DE102022118203A1 - Method for evaluating or selecting a charging device, motor vehicle, device and system - Google Patents

Abstract

A first method for evaluating a charging device (150; 150a), which is used to charge electrical energy storage devices (111) of electrically driven motor vehicles (110), is proposed, the method comprising the following steps:
- Charging an energy storage device (111) of a motor vehicle (110; 110a) at a charging device (150; 150a);
- Detecting at least one condition (B), under which the charging device (150; 150a) is used or can be used to charge the energy storage (111), by means of the motor vehicle (110; 110a) and/or a sensor (116; 116';116'') or otherwise; and
- Transmitting the recorded condition (B) to a central instance (130) and/or to a collection (140) which holds conditions (B') collected for a large number of charging devices (150; 150a; 150b; 150c) for their evaluation .
A second method is used to select a charging device (150; 150a).

Description

The registration concerns a method for evaluating a charging device and a motor vehicle set up for this purpose. The application further relates to a method for selecting a charging device and a device and a system set up for this purpose.

Road traffic increasingly consists of motor vehicles that can be driven electrically and for this purpose have an electrical energy storage device, i.e. a drive battery that is designed as a rechargeable battery. This drive battery is often referred to as high-voltage storage (HVS) because of the typical battery voltage of 400, 800 or 900 volts; also in contrast to mere supply batteries for fuel-consuming vehicles, which with voltages of 12 volts are only used to start and provide basic power to other electrical auxiliary systems such as lighting, display elements, etc.

When it comes to electric vehicles, i.e. vehicles that can be powered electrically, a distinction is made between battery-electric vehicles (BEV; Battery Electric Vehicle) and hybrid-electric vehicles, i.e. vehicles that can be powered either with fuel or with electricity (HEV = Hybrid Electric Vehicle; PHEV = Plug-in Hybrid Electric Vehicle). To recharge the electrical energy or high-voltage storage of electrically powered motor vehicles, charging devices or charging stations are used to electrically charge the high-voltage storage of the vehicle using a charging cable. These charging devices are preferably DC charging devices (direct current), which work with direct current and therefore enable very short charging times; On DC charging devices, the typical charging time is usually only around 15 to 30 minutes. There are practically only DC charging facilities at motorway rest stops. AC charging devices powered by alternating current, on the other hand, are designed for overnight charging processes lasting several hours; for example in residential areas. The present application does not exclusively, but in particular relate to charging at DC charging devices; This is also referred to as fast charging facilities.

When charging an electrically operated motor vehicle at a charging device, the problem is that decision-relevant conditions that prevail at a charging device for charging vehicles are often not known, not completely known, not applicable or not fully valid, or are not adhered to in practice become.

The most important of these conditions is the information about how quickly, i.e. with what maximum charging power and thus charging speed, typically specified in kW, the recharging of a motor vehicle or its high-voltage storage device can be carried out at a specific charging device. In particular, if an assured electrical charging power of a charging device or a maximum value for this is not adhered to by the charging device or is too low for other reasons, charging processes taking place at this charging device take an unnecessarily long time and require even longer charging stop breaks, i.e. travel interruptions during a car journey.

In addition to the mostly known maximum charging power, the mostly unknown maximum charging current that a charging station or charging device, a specific charging station of this charging station or one of several charging points of a charging station provides is also important for the charging time, since the maximum charging power at some charging stations with current limitations For example, this can only be achieved with an 800V high-voltage storage device, but not with a 400V high-voltage storage device. If the charging current is not available as requested by the high-voltage battery, but is only available at a reduced level, the charging time increases.

On the one hand, the maximum charging current strength of the charging point can be lower than the maximum possible charging current strength of the high-voltage battery of the vehicle to be charged; on the other hand, it can be dynamically adjusted by a possible power split capability of a charging station with several charging points by connecting another vehicle, by a power limitation of the charging park or the charging station or reduce it by overloading the charging station.

Without sufficient or sufficiently reliable information about the charging conditions that prevail during recharging at the charging facilities, which are located nationwide, across Europe or elsewhere on the regional road network, it is difficult to optimally optimize the time and place of the next recharging process Selecting routes and, in particular, making longer journeys as efficient as possible.

It is the object of the present application to enable a more reliable assessment of the charging conditions that prevail at the available charging devices when recharging electrical energy storage devices in motor vehicles, and based on this also to enable a better selection of the charging devices to be used. For this purpose, appropriate procedures and a corresponding approach should be implemented oriented vehicle and a suitable device and system are provided.

This task is solved by the subject matter of independent claims 1, 9, 10, 14 and 15. The subclaims reflect some of the preferred embodiments.

• - Aufladen eines Energiespeichers eines Kraftfahrzeugs an einer Ladeeinrichtung;
• - Erfassen wenigstens einer Bedingung, unter welcher die Ladeeinrichtung zum Aufladen des Energiespeichers genutzt wird oder nutzbar ist, mittels des Kraftfahrzeugs und/oder eines Sensors oder anderweitig; und
• - Übermitteln der erfassten Bedingung an eine zentrale Instanz und/oder an eine Sammlung, die zu einer Vielzahl von Ladeeinrichtungen gesammelte Bedingungen zu deren Bewertung bereithält.

According to a first method aspect, this application proposes a method for evaluating a charging device that is used to charge electrical energy storage devices of electrically powered motor vehicles, the method comprising the following steps:

• - Charging an energy storage unit of a motor vehicle at a charging device;
• - Detecting at least one condition under which the charging device is used or can be used to charge the energy storage device, by means of the motor vehicle and/or a sensor or otherwise; and
• - Transmitting the recorded condition to a central instance and/or to a collection that holds conditions collected for a large number of charging devices for their evaluation.

The information about which conditions or states prevail at a charging device during charging is, as proposed here, obtained by the vehicle itself, when its electrical energy storage is being charged there, and / or a sensor of the vehicle at least one condition, in particular charging condition during charging at this charging device is recorded, in particular measured and/or stored. In addition, the vehicle transmits this recorded condition to a central instance in which such conditions can be collected and stored. The vehicle therefore acts as a mobile measuring station for general conditions relating to recharging at the respective charging facilities. These conditions can in particular also be recorded automatically, i.e. unnoticed by the driver.

As a result, when simply charging the energy or high-voltage storage device, i.e. during or at least on the occasion of a specific charging process, one or more conditions that characterize the circumstances surrounding the recharging at this charging device can be detected - in particular by the vehicle or its sensor - and at a central location which enables the information about these conditions to be used across vehicles and/or charging facilities and/or their locations.

• - Sammeln von Bedingungen, die durch eine Vielzahl von Kraftfahrzeugen bei der Nutzung einer Vielzahl von Ladeeinrichtungen erfasst wurden, durch die zentrale Instanz und/oder die Sammlung; und
• - Bewerten einer Ladeeinrichtung der Vielzahl von Ladeeinrichtungen auf der Basis mehrerer durch die zentrale Instanz und/oder durch die Sammlung bereitgestellter Bedingungen, unter denen diese Ladeeinrichtung genutzt wurde und/oder nutzbar ist.

Preferably the method may further comprise:

• - Collecting, through the central authority and/or the collection, conditions recorded by a plurality of motor vehicles when using a plurality of charging devices; and
• - Evaluate a charging device of the plurality of charging devices on the basis of several conditions provided by the central entity and/or by the collection under which this charging device was used and/or can be used.

These conditions are stored and/or transmitted by the respective vehicle in conjunction with the date, time and/or type of vehicle and/or high-voltage battery and/or with GPS data from the charging station, by collection or by the central authority , which maintains and/or manages this collection, is assigned to the charging device used together with this and, if necessary, other information and stored centrally. However, an assignment to the respective vehicle can be rejected or deleted and/or excluded from storage.

When detecting, a condition is preferably detected that is related to the charging process of the energy storage device that took place at the charging device. For example, the condition can include a maximum charging current strength of the charging device and/or the difference between the charging current strength provided at the charging point and the requested charging current strength of the energy storage device of the motor vehicle, and this maximum charging current strength of the charging device can be determined by the motor vehicle and/or the sensor depending on various electrical, electrochemical and temporal variables can be determined.

Furthermore, the motor vehicle and/or the sensor can be used to determine whether a charging station of the charging device, whose charging current intensity can only be read on the nameplate, provides a nominal maximum charging power when used multiple times by several charging points or not, and/or what the actual maximum charging power and Maximum charging current strength provided by the charging station at the charging point used by the measuring vehicle for multiple uses.

Through these measurements, the current intensity or maximum current intensity that is actually used for charging by the charging device and, if applicable, the charging point and/or the charging column can be determined independently and objectively and in conjunction with case distinctions, which are stated in the following of an operator or operator association of charging stations is not taken into account or is not differentiated or is not sufficiently differentiated according to vehicle or battery models or other circumstances such as double occupancy of one and the same charging station.

Furthermore, a condition can be detected that relates to a parking space provided at the charging device for the charging process. A roof or lighting on the charging device can be measurable using rain or light sensors on the vehicle. Furthermore, conditions can also be recorded that relate to a service offer for users of the charging device and/or the motor vehicle; such as the presence and/or spatial or temporal distance to a toilet or to a catering service.

• - wenigstens eine Bedingung zu erfassen, unter welcher die Ladeeinrichtung zum Aufladen des Energiespeichers genutzt wird und/oder nutzbar ist, und
• - die erfasste Bedingung an eine zentrale Instanz und/oder eine Sammlung, die zu einer Vielzahl von Ladeeinrichtungen gesammelte Bedingungen zu deren Bewertung bereithält, zu übermitteln.

Here, a motor vehicle is further provided which is electrically drivable and has a rechargeable electrical energy storage device, wherein the motor vehicle has at least one sensor and wherein the motor vehicle and/or the sensor is set up to charge the energy storage device at a charging device

• - to detect at least one condition under which the charging device is used and/or can be used to charge the energy storage device, and
• - to transmit the recorded condition to a central instance and/or a collection that holds conditions collected for a large number of charging devices for their evaluation.

The vehicle can therefore take on tasks and work steps and ultimately make them unnecessary, which would otherwise have to be carried out by other technical devices such as navigation devices, by operators of charging stations and/or by drivers. At the same time, these tasks can be carried out automatically without any visible additional effort for the driver and even without the driver's knowledge.

• - Vorgeben einer Bedingung, unter welcher eine noch auszuwählende Ladeeinrichtung zum Aufladen eines Energiespeichers eines Kraftfahrzeugs benutzt oder priorisiert werden soll; und
• - Auswählen einer Ladeeinrichtung durch
  • - Vergleichen der vorgegebenen Bedingung mit zu einer Vielzahl von Ladeeinrichtungen gesammelten Bedingungen, die mittels Kraftfahrzeugen und/oder Sensoren oder anderweitig erfasst wurden und in einer zentralen Instanz und/oder Sammlung bereitgehalten werden, und/oder durch
  • - Abfragen einer auf den gesammelten Bedingungen basierenden Bewertung.

According to a second method aspect, this application proposes a method for selecting a charging device, the method comprising the following steps:

• - specifying a condition under which a charging device yet to be selected should be used or prioritized for charging an energy storage unit of a motor vehicle; and
• - Select a charging device
  • - Comparing the specified condition with conditions collected from a large number of charging devices, which were recorded using motor vehicles and/or sensors or otherwise and are kept available in a central instance and/or collection, and/or by
  • - Query a rating based on the conditions collected.

This process enables the use of information collected from vehicles and collected centrally about the conditions prevailing at charging facilities for charging the high-voltage storage systems of motor vehicles. This information can be used in particular for car journeys in order to plan them more efficiently; They can be used, for example, to determine a route before the journey or for navigation during the journey.

• - den Typ eines Kraftfahrzeugs oder Energiespeichers,
• - eine Ladeeinrichtung,
• - einen Aufladevorgang an der Ladeeinrichtung,
• - einen an der Ladeeinrichtung vorgesehenen Stellplatz und/oder
• - ein Service-Angebot für Nutzer der Ladeeinrichtung und/oder des Kraftfahrzeugs,
• - eine Kundenbewertung und/oder
• - Energiekosten betrifft.

In the first or second method it can be provided that a condition is specified or specified, which

• - the type of motor vehicle or energy storage device,
• - a charging device,
• - a charging process at the charging device,
• - a parking space provided at the loading facility and/or
• - a service offer for users of the charging device and/or the motor vehicle,
• - a customer review and/or
• - Energy costs are concerned.

• - eine maximale Ladestromstärke der Ladeeinrichtung, des Ladevorgangs und/oder des Energiespeichers - vorzugsweise für Gleichstrom - und/oder
• - eine maximale Ladeleistung der Ladeeinrichtung, des Ladevorgangs und/oder des Energiespeichers und/oder
• - eine Spannung - vorzugsweise eine Gleichspannung - der Ladeeinrichtung und/oder des Energiespeichers

umfassen; ferner die Information, ob eine Ladesäule der Ladeeinrichtung eine nominelle maximale Ladeleistung bei Mehrfachnutzung durch mehrere Ladepunkte zur Verfügung stellt oder nicht; und/oder die Angabe, welche tatsächliche maximale Ladeleistung und/oder welche tatsächliche Ladestromstärke die Ladesäule bei Mehrfachnutzung zur Verfügung stellt.This given condition can

• - a maximum charging current of the charging device, the charging process and / or the energy storage - preferably for direct current - and / or
• - a maximum charging power of the charging device, the charging process and/or the energy storage and/or
• - a voltage - preferably a direct voltage - of the charging device and / or the energy storage

include; further information as to whether a charging station provides the charging device with a nominal maximum charging power when used multiple times by several charging points or not; and/or information about what actual maximum charging power and/or what actual charging current the charging station provides when used multiple times.

Furthermore, a device is proposed here which is used to select a charging device is set up using this method to select a charging device. The device can in particular be a navigation device, a smartphone or something else, a smart device such as SmartWatch, Apple Glasses, Microsoft HoloLens, or a motor vehicle or a motor vehicle component.

• - eine zentrale Instanz und/oder eine Sammlung, die eingerichtet ist, für eine Vielzahl von Ladeeinrichtungen Bedingungen zu deren Nutzung und/oder darauf basierende Bewertungen der Ladeeinrichtungen zu sammeln und/oder bereitzuhalten, und
• - eine Anzahl von Kraftfahrzeugen, die jeweils elektrisch antreibbar sind und einen aufladbaren Energiespeicher sowie mindestens einen Sensor aufweisen.

Finally, a system for evaluating and/or selecting charging devices is proposed here, on which electrical energy storage devices of electrically driven motor vehicles can be charged. The system includes at least the following:

• - a central instance and/or a collection that is set up to collect and/or provide conditions for the use of a large number of charging devices and/or assessments of the charging devices based thereon, and
• - a number of motor vehicles, each of which can be driven electrically and has a rechargeable energy storage device and at least one sensor.

• - eine an einer Ladeeinrichtung erfasste Bedingung zu ihrer Nutzung an die zentrale Instanz und/oder die Sammlung zu übermitteln und/oder
• - für einen Vergleich mit einer vorgegebenen Bedingung von der zentralen Instanz und/oder der Sammlung dort bereitgehaltene Bedingungen der Nutzung von Ladeeinrichtungen und/oder darauf basierende Bewertungen der Ladeeinrichtungen abzurufen.

The respective motor vehicle is set up to

• - to transmit a condition recorded on a charging device to the central authority and/or the collection for its use and/or
• - to retrieve conditions for the use of charging devices and/or assessments of the charging devices based on them for a comparison with a predetermined condition from the central instance and/or the collection.

In principle, all road traffic, to the extent that it consists of electrically powered vehicles, can benefit from a more efficient, more realistic and/or more differentiated assessment and/or selection of charging devices, in particular the locations of the charging stations, charging columns and/or charging points. This eliminates the need for and/or shortens travel interruptions that are caused by charging the high-voltage batteries.

Parts of the methods presented can be carried out by one or more processing devices, and the respective processing device can be set up to carry out a method described herein in whole or in part. For this purpose, the processing device can comprise a programmable microcomputer or microcontroller, and the method can be in the form of a computer program product with program code means or in the cloud. The computer program product can also be stored on a computer-readable data carrier. Features or advantages of the first and/or second method can be transferred to the device, the vehicle and/or the system or vice versa.

• 1 ein exemplarisches, schematisch dargestelltes System zum Bewerten und/oder Auswählen von Ladeeinrichtungen,
• 2 ein ebenfalls schematisches und lediglich exemplarisches Ablaufdiagramm eines ersten Verfahrens zum Bewerten von Ladeeinrichtungen, eines zweiten Verfahrens zum Auswählen von Ladeeinrichtungen sowie eines aus beiden Verfahren kombinierten Verfahrens,
• 3A einen beispielhaften Verlauf des Ladestroms beim Aufladen eines Energiespeichers eines Fahrzeugs, wenn die Ladeeinrichtung einen genügend hohen Ladestrom bereitstellt,
• 3B einen beispielhaften Verlauf des Ladestroms beim Aufladen eines Energiespeichers eines Fahrzeugs, wenn die Ladeeinrichtung einen zu geringen Ladestrom bereitstellt,
• 4A einen beispielhaften Verlauf des Ladestroms beim Aufladen eines Energiespeichers eines ersten Fahrzeugs, wenn der Ladepunkt an der Ladeeinrichtung bei Ankunft eines zweiten aufzuladenden Fahrzeugs keinen genügend hohen Ladestrom mehr bereitstellt, und
• 4B einen beispielhaften Verlauf des Ladestroms beim Aufladen eines Energiespeichers eines ersten Fahrzeugs, wenn der Ladepunkt an der Ladeeinrichtung einen genügend hohen Ladestrom nur bereitstellt, wenn und/oder solange an einem weiteren Ladepunkt derselben Ladeeinrichtung und/oder derselben Ladesäule kein zweites Fahrzeug aufgeladen wird.

Some exemplary embodiments will now be explained with reference to the figures. Show it:

• 1 an exemplary, schematically represented system for evaluating and/or selecting charging devices,
• 2 a likewise schematic and merely exemplary flowchart of a first method for evaluating charging devices, a second method for selecting charging devices and a method combined from both methods,
• 3A an exemplary course of the charging current when charging an energy storage unit of a vehicle when the charging device provides a sufficiently high charging current,
• 3B an exemplary course of the charging current when charging an energy storage device of a vehicle when the charging device provides a charging current that is too low,
• 4A an exemplary course of the charging current when charging an energy storage device of a first vehicle if the charging point at the charging device no longer provides a sufficiently high charging current when a second vehicle to be charged arrives, and
• 4B an exemplary course of the charging current when charging an energy storage device of a first vehicle if the charging point at the charging device only provides a sufficiently high charging current if and / or as long as no second vehicle is charged at another charging point of the same charging device and / or the same charging station.

1 shows, in a purely schematic representation, a system 180 for evaluating and/or selecting charging devices 150; 150a; 150b; 150c, i.e. charging stations or their locations, which can, for example, be distributed regionally, statewide or nationwide, across Europe or in any other geographical area of the world and are connected to a road network. If any vehicle 110; 110a; 110b; 110c visits any charging facility, it can transmit its location using the vehicle's own GPS signal and/or using the GPS signal of a smart device linked to the vehicle. This allows any information to be assigned, in particular of technical and other conditions B that occur during a charging process at this charging device 150; 150a; 150b; 150c rule or have ruled. The conditions B recorded by any vehicle can thus be transmitted assigned to the respective charging device; for example to a central instance 130 or central location; in particular one that contains, maintains and/or manages a collection 140. In this collection 140 there are a variety of charging devices 150; 150a; 150b; 150c may contain collected conditions B', such as those conditions B' or information about such conditions B' that were recorded by motor vehicles 110 during previous or previous visits to charging facilities 150 and sent to the central instance 130 or to the collection 140 were transmitted. The central instance 130 or the collection 140 can alternatively or additionally also contain evaluations of the charging devices and also have them available for retrieval for future charging processes by selected or any vehicles, drivers or other user groups. As far as a charging device 150 is mentioned here, a specific charging station, a specific charging column 160; 160a; 160b; 160c and/or a specific charging point 170a, 170b, i.e. a specific charging hose. Of the three in 1 Charging columns 160a to 160c shown, the second 160b has two separate charging points 170a, 170b, which can also be used at the same time. The question often arises here as to whether a specified value of the maximum charging power is also provided during dual use of this charging station, or whether instead there is a temporarily lower charging power and/or a lower maximum charging current than is only stated on the charging station's nameplate.

Current current currents range from 120A to 500A for the CCS 2.0 standard for motor vehicles or up to 600A for the Chinese ChaoJi standard, and the voltage range of the charging stations usually ranges from 250V to 1000V).

Below are exemplary details of a vehicle 110 proposed in accordance with this application; 110a explains that it is set up to record - in particular to measure - the conditions B or B * that prevail at charging stations when recharging the drive battery or its electrical high-voltage energy storage 111 and to the central point 130 and / or the collection or retrieve it later. The vehicle 110 set up in this way; 110a is thereby enabled to carry out the first and second methods described here.

The vehicle 110; 110a has an electrical high-voltage energy storage 111, namely a rechargeable high-voltage storage device as a drive battery. In addition, one or more sensors 116; 116', 116'' provided; For example, a sensor 116 for detecting a current or maximum charging current and / or a current or maximum electrical power of the charging device 150 used, i.e. the charging station 150a, the charging column 160a or the charging point during the charging process. Immediately the loading device 150; 160; 170 relevant circumstances or conditions B, which primarily include electrical conditions or electrical or other measured values, are designated in this application partly by L, insofar as they characterize the charging process, and partly by E, insofar as they are a property of the charging device 150; 160; 170 mark.

The electrically driven motor vehicle 110; 110a can have a navigation device 115, which can also be part of an infotainment device. The navigation device 115 can be equipped with a SIM or E-SIM card 112, with a display 113, an audio interface 114 and/or with one or more of the sensors 116; 116'; 116'' connected; either wired or wireless. One or more conditions B, which were detected by the vehicle 110 or a sensor 116 of the vehicle, can be stored at least temporarily in the navigation device 115 or another unit or vehicle component of the vehicle 110 and can be transmitted. The units listed here above or one or some of them may also include a detection unit 117 and/or a storage unit 118, in which one or more conditions B; E; L are stored or storable.

Such conditions B; E; L, which relate to recharging or in the narrower sense the charging device and/or the charging process or other circumstances, are preferably handled by a central unit 130 in the collection 140 for a plurality of charging devices 150, 160; 170 filed and kept ready. There these conditions can B; B'; E; L for a large number of vehicles 110, navigation devices 105, 115, users of the vehicles and / or charging devices or for other groups of people. Whenever any vehicle 110 or its sensor 116 transmits a condition B newly detected at any charging device 150, 160, 170 to the central entity 130, this condition B is stored in it or in the collection; preferably stored as a separate data record relating to the respective charging device, i.e. assigned to it and, if necessary, combined with further information, as explained above.

In 1 the vehicle is 110; 110a also represents any other vehicle 110b, 110c. The electrical energy or high-voltage storage 111 of the vehicle 110; 110a each has a current state of charge. This state of charge, which is symbolized in the figures by the reference symbol SoC, is usually given as a percentage of the charging capacity. The memory 111 is usually only charged quickly up to approximately 80% of its charging capacity, because further charging can only take place with a significantly reduced charging current intensity and therefore only with a significantly increased charging time for reasons of service life. When the charge level is 10% or 5% at the latest, it is time to go to the nearest charging facility 150, 160, 170. In the case of an electric vehicle route, the so-called e-route contains information about the locations of available charging facilities, which, however, does not traditionally contain complete and/or reliable information about the actual conditions that prevail at these charging facilities during charging processes; in particular the maximum charging current intensity actually provided during charging by the charging station 150, the charging column 160 and/or the charging point 170a; 170b or also the maximum charging current intensity provided during powersplit (cf. the 3A until 4B) is often unknown or incorrectly stated; The same applies to the actual value of the maximum charging current on the part of the charging device. The setpoint of the charging current is usually requested by the battery management system at the charging station, and the vehicle receives the actual value for charging the drive battery from the charging station.

If this current intensity is smaller than the maximum charging current intensity of the drive battery 111, charging takes place more slowly than actually possible. The break planned for the purpose of the charging stop is extended, and a route that is calculated to be optimal may actually be more disadvantageous, more expensive, slower and/or less suitable for other reasons than another.

Each of the vehicles 110 set up as proposed here; 110a; 110b; 110c, but also a navigation device 105 used and/or set up instead of a specific vehicle 110a or in addition to it; 115 can communicate with the central entity 130 to provide it with data specific to the collection 140, i.e. conditions B; B'; B'', E; L or information that relates to any boundary or general conditions when recharging at any or selected charging facilities and/or to transmit such data, i.e. conditions B; B'; B'', E; L or to retrieve information. However, there is normally no direct communication between the vehicles regarding the recharging conditions.

2 shows purely schematically and only as an example a flowchart of a first method 200 for evaluating charging devices 150; 150a; 150b; 150c and a flowchart of a second method 200'' for selecting charging devices 150; 150a; 150b; 150c. Both methods 200, 200'' can be combined with one another for one or many vehicles. The overall process 200' can therefore contain both processes 200; 200'' combine together; comprising at least one embodiment of the first method - carried out by means of a first vehicle 110a at a first charging device 150a - and further comprising at least one embodiment of the second method - carried out by means of any, for example second, vehicle 110b at any charging device 150; be it the same charging device 150a or a different charging device 150b; 150c. The central instance 130 or the collection 140 of conditions B managed by it is preferably also present on both the first method 200 and/or the second method 200'';B';B'' involved. Down in 2 is the respective unit that carries out the procedural steps above it, namely a first vehicle 110a, the central entity 130 and a further, second vehicle 110b.

• - Aufladen S201 des Hochvolt-Energiespeichers 111 des ersten Kraftfahrzeugs 110a an der ersten Ladeeinrichtung 150a;
• - Erfassen S202 wenigstens einer Bedingung B, unter welcher die erste Ladeeinrichtung 150a zum Aufladen des Energiespeichers 111 genutzt wird oder nutzbar ist, mittels des ersten Kraftfahrzeugs 110a und/oder seines Sensors 116; 116'; 116'' oder anderweitig; und
• - Übermitteln S203 der erfassten Bedingung B an eine zentrale Instanz 130 und/oder an eine Sammlung 140, die zu einer Vielzahl von Ladeeinrichtungen 150a; 150b; 150c gesammelte Bedingungen B' für deren Bewertung bereithält.

The first method 200 is used to evaluate a first charging device 150a on the occasion of a charging process in which the electrical high-voltage energy storage 111 of a first electrically driven motor vehicle 110 is charged at this first charging device 150a. The first method 200 includes the following steps:

• - Charging S201 of the high-voltage energy storage device 111 of the first motor vehicle 110a at the first charging device 150a;
• - Detecting S202 at least one condition B, under which the first charging device 150a is used or can be used to charge the energy storage 111, by means of the first motor vehicle 110a and/or its sensor 116; 116';116'' or otherwise; and
• - Transmit S203 the recorded condition B to a central instance 130 and/or to a collection 140, which belongs to a plurality of charging devices 150a; 150b; 150c collected conditions B' for their evaluation.

This first method can be repeated many times and can therefore be carried out in particular by a large number of vehicles for a large number of charging devices. By transmitting respective information regarding the conditions B that existed during charging at the respective charging devices to the central instance 130 over a longer period of time, respective vehicles 110 build up a central collection 140 of charging process conditions that are reliable Information about actual usage or charging conditions, ie charging conditions, namely the new condition B freshly transmitted by any vehicle supplements the inventory of previously collected conditions B' and can be queried by any vehicles in the future (conditions B''). Preferably, all conditions B″ queried at some point remain in the central instance or collection 130; 140 is stored, as are all new conditions B that have been transmitted here as well as the inventory B' of old conditions B'. In vehicles 110a; 110b, on the other hand, the respective conditions B; B'' or information about it will be deleted after transmission or use.

Thus, the first method preferably also includes collecting S204 conditions B; B', which is represented by a plurality of motor vehicles 110a; 110b when using a variety of charging devices 150a; 150b were recorded by the central instance 130 and/or the collection 140. According to a further development, the central instance 130, which has the most data, can also carry out an evaluation S205 of one or many charging devices 150; 150a; 150b; 150c are carried out on the basis of several conditions B provided by the central entity 130 and/or by the collection 140; B', under which the respective charging device 150 was used and/or can be used. These conditions are saved associated with the corresponding charging device; preferably with further information such as date, time, vehicle and/or battery type, etc.

• - Vorgeben S206'' einer Bedingung B'', unter welcher eine noch auszuwählende Ladeeinrichtung zum Aufladen eines Energiespeichers 111b eines Kraftfahrzeugs 110b benutzt und/oder priorisiert werden soll; und
• - Auswählen S207'' einer Ladeeinrichtung 150; 150a durch
  • - Vergleichen der vorgegebenen Bedingung B'' mit zu einer Vielzahl von Ladeeinrichtungen 150; 150a; 150b; 150c gesammelten Bedingungen B; B', die mittels Kraftfahrzeugen 110 und/oder Sensoren 116; 116'; 116'' oder anderweitig erfasst wurden und in einer zentralen Instanz 130 und/oder Sammlung 140 bereitgehalten werden, und/oder durch
  • - Abfragen einer auf den gesammelten Bedingungen B; B' basierenden Bewertung.

The second method 200'' - which is carried out below as an example by another, second vehicle 110b, but here as an example for selecting the same charging device 150a previously used in the first method - is used to select a charging device 150 by this other vehicle and includes the following steps:

• - specifying S206'' a condition B'' under which a charging device yet to be selected should be used and/or prioritized for charging an energy storage device 111b of a motor vehicle 110b; and
• - Selecting S207'' a charging device 150; 150a through
  • - Comparing the predetermined condition B'' with a plurality of charging devices 150; 150a; 150b; 150c collected conditions B; B ', by means of motor vehicles 110 and/or sensors 116; 116';116'' or otherwise recorded and held in a central instance 130 and/or collection 140, and/or by
  • - Querying a condition based on the collected conditions B; B' based evaluation.

In this way, a first charging device 150a, at which a first vehicle was recharged at a first, earlier time, can be selected for recharging a second vehicle at a second, later time using the information B recorded, transmitted and collected thereby, the information B (now as B'') is queried in the second procedure. However, the information B can also lead to the first charging device 150a not being selected later in the second method 200'', for example if a condition there that was announced does not exist in practice, no longer exists or only exists to a limited extent; For example, if the charging current is too low or another disadvantageous condition has been detected there.

The second method 200″ can be carried out with the same first vehicle 110a and/or the same first charging device 150a as the first method; for example to plan a later return trip. In the general case, however, if at some point, somewhere and/or by some vehicle the second method 200'' is carried out, in practice this second method will usually be a different charging device 150; 150a; 150b; 150c relate and are carried out by a different vehicle or its sensor than the first method, as in 2 is sketched as an example for simplification. But after at least the first method for a large number of charging devices 150; 150a; 150b; 150c and by a variety of vehicles 110; 110a; 110b; 110c has been carried out, there is a sufficiently extensive collection 140 of the conditions B, B ', B'' prevailing at the charging devices in the central instance 130 after an initial period at the latest, in order to better optimize this collection 140 at any charging devices and by any vehicles can be used conventionally. The second method therefore also delivers the fastest, most efficient, cheapest and/or in other respects optimal results in order to always select the most suitable charging device from now on - be it for a one-off recharging or for a longer route with several charging breaks.

The total procedure 200` in 2 in practice therefore includes a multiple number of executions of the first method 200 and the second method 200'' - carried out by any motor vehicles 110; 110a; 110b; 110c. The total procedure 200` in 2 is therefore often recursive.

Preferred conditions for evaluating and/or selecting charging devices 150 for charging the vehicle batteries 111 are the electrical parameters during charging. High-voltage storage systems usually have a battery voltage of 400, 800 or 900 volts. The charging devices 150; 160; 170; In particular, the quick-charging columns 160 can apply voltages of currently up to 1000 volts when charging and can therefore in particular charge both high-voltage storage devices to 400 volts and those to 800 volts. The maximum current required for charging by the high-voltage storage system or its battery management system (BMS), which controls charging and other processes, is usually 500 A (CCS 2.0 standard). The one from a charging station 150; However, the available charging current is currently typically between 125 and 500 amps. Depending on the case, this may be too little or sufficient for recharging. The electrical charging power is the product of the charging current and the charging voltage, ie the current is the quotient of the charging power and the charging voltage.

Of these three variables, charging power, charging voltage and charging current, only one variable is often known from the charging station; and only those vehicle users who have already contractually bound themselves to a specific operator or network of operators of the charging facilities and only then receive the geodata of the locations of their charging facilities as well as rudimentary information on the electrical variables of the charging processes.

• - eine Ladesäule 160 mit nur einem Ladepunkt 170 oder
• - eine Ladesäule 160 mit zwei Ladepunkten 170a, 170b (s. weiter unten).

3A shows an exemplary course of the charging current when charging an energy storage unit of a vehicle if the charging device provides a sufficiently high charging current. Here is the DC charger 150 for example

• - a charging station 160 with only one charging point 170 or
• - a charging station 160 with two charging points 170a, 170b (see below).

The steps in the time-dependent course of the target value (dashed line) of the charging current I _target (t) in 3A correspond to a specification controlled by the BMS system, ie by the energy storage 111, which gradually lowers this time-dependent setpoint in several stages as the state of charge SoC of the high-voltage energy storage 111 increases. Alternatively, the lowering can also take place continuously or in a larger number of stages or quasi-continuously. An example with only a few relatively large stages is used below and charging is only assumed up to a state of charge of SoC = 80% of the total capacity of the high-voltage energy storage device 111 or slightly less.

• I_Soll (t) = Sollwert der Ladestromstärke (seitens des Hochvolt-Energiespeichers) und
• I_Ist (t) = Istwert der Ladestromstärke (Ladeeinrichtung und/oder Ladevorgang).

As in 3A can be seen, follows the charging device 150a; 160a; 170a (as condition B and/or property E; see above) or the actual value (solid line) of the charging current intensity I _Ist (t) made possible by the charging process (as condition B and/or L; see above) at any time, ie at each time-dependent state of charge SoC (t) over the entire charging period t the setpoint I _setpoint (t) (represented by the dashed line), which was requested by the energy storage 111 or its BMS system and / or is requested during charging; i.e. I _Actual (t) = I _Target (t) applies at all times

• I _target (t) = target value of the charging current (on the part of the high-voltage energy storage unit) and
• I _Actual (t) = actual value of the charging current (charging device and/or charging process).

• I_Soll-max = Sollwert der maximalen Ladestromstärke (seitens des Hochvolt-Energiespeichers)
• I_Ist-max = Istwert der max. Ladestromstärke (Ladeeinrichtung und/oder Ladevorgang).

This agreement also applies to the maximum values I _{actual max} = I _{target max} with

• I _{target max} = target value of the maximum charging current (on the part of the high-voltage energy storage unit)
• I _Actual-max = Actual value of the maximum charging current (charging device and/or charging process).

The battery management system BMS can measure the actual value of the maximum charging current I _Actual-max of the charging device and/or the charging process; in 3A The values for current intensity, charging power and/or charging voltage required by the energy storage device 111 or its BMS system and/or promised by the provider are apparently adhered to.

• - eine Ladesäule 160a mit nur einem einzigen vorhandenen Ladepunkt,
• - für eine Ladesäule 160b mit zwei Ladepunkten 170a, 170b, von denen aber nur ein einziger Hochvolt-Energiespeicher 111 eines ersten Fahrzeugs 110a an den ersten Ladepunkt 170a angeschlossen ist, wobei während des gesamten Ladevorgangs kein zweites Fahrzeug an den anderen Ladepunkt 170b angeschlossen ist (Powersplit-Funktion vorhanden oder auch nicht, aber nicht benötigt), oder
• - für das Aufladen eines ersten Hochvolt-Energiespeichers 111 eines ersten Fahrzeugs 110a an einer Ladesäule 160b mit zwei Ladepunkten 170a, 170b, wobei die Ladesäule 160b und/oder der benutzte erste Ladepunkt 170a trotz der Powersplit-Funktion auch dann jederzeit die angeforderte Stromstärke liefert. Mit Powersplit ist die Fähigkeit der Ladesäule gemeint, den maximale Ladestrom der Ladesäule auf zwei Ladepunkte aufzuteilen. Somit kann, wenn ein erstes Fahrzeug lädt und ein zweites Fahrzeug auch noch an dieselbe Ladesäule angesteckt wird, nicht mehr der von dem ersten Fahrzeug angeforderte Sollwert erreicht werden. Die Powersplit-Fähigkeit einer Ladesäule verhindert daher das tatsächliche Erreichen der in der Navigation eingeplante Ladeleistung und verzögert somit die tatsächliche Ladedauer für den Hochvolt-Energiespeicher eines ersten Fahrzeugs 110a, wenn zeitweise oder die ganze Zeit über auch noch ein Hochvolt-Energiespeicher eines zweiten Fahrzeugs 110b an den zweiten Ladepunkt 170b angeschlossen war, angeschlossen ist und/oder angeschlossen wird.

The diagram according to 3A For example, can apply to

• - a charging station 160a with only a single charging point,
• - for a charging station 160b with two charging points 170a, 170b, of which only a single high-voltage energy storage device 111 of a first vehicle 110a is connected to the first charging point 170a, with no second vehicle being connected to the other charging point 170b during the entire charging process ( Power split function available or not, but not needed), or
• - for charging a first high-voltage energy storage device 111 of a first vehicle 110a at a charging station 160b with two charging points 170a, 170b, whereby the charging station 160b and/or the first charging point 170a used also delivers the requested current at all times despite the power split function. Powersplit refers to the ability of the charging station to divide the maximum charging current of the charging station between two charging points. This means that if a first vehicle is charging and a second vehicle Even if the vehicle is plugged into the same charging station, the target value requested by the first vehicle can no longer be achieved. The power split capability of a charging station therefore prevents the charging power planned in the navigation from actually being achieved and thus delays the actual charging time for the high-voltage energy storage of a first vehicle 110a if there is also a high-voltage energy storage of a second vehicle 110b at times or all of the time was connected, is connected and/or will be connected to the second charging point 170b.

3B shows an exemplary course of the charging current when charging a high-voltage energy storage unit of a vehicle if the charging device provides a charging current that is too low. Here, for example, there is a DC charging station 160b with two charging points 170a, 170b, but with a power split function, ie without the possibility of the promised charging current, charging voltage and / or charging power when both charging cables or charging points 170a, 170b are occupied for both charging points 170a, 170b at the same time. 3B shows, for example, the time-dependent charging current intensity provided by the charging station 160b at its first charging point 170a for a first vehicle 110a as an actual value and a setpoint. As can be seen, only after reaching a state of charge of 50% of the battery capacity, ie only from the point in time at which the BMS system of the high-voltage storage unit 111 of the first vehicle 110a reaches the requested setpoint I _target (t) of the charging current, for example of 500 A 300 A, the actual value I _Act (t) of the charging current of the charging device and/or the charging process follows this specification. In 3B It is assumed that during the entire charging process of the first vehicle 110a at the first charging point 170a of the charging station 160b, a second vehicle 110b is connected in parallel to the other, second charging point 170b of this charging station 160b, the charging current of which is in 3B However, it is not shown, but with a time delay it should look the same or similar to the course shown in 3B , 4A or 4B for charging the high-voltage storage of the first vehicle 110a.

Alternatively, in 3B It can be assumed that the first vehicle can tolerate and/or requires a maximum charging current of, for example, 500A, but a charging station with a charging point and without a power split can only provide a maximum charging current of 300A and therefore the charging power promised by the operator can only be achieved, for example, with an 800V High-voltage energy storage, but cannot be achieved with 400V high-voltage energy storage.

In 3B The setpoint I _target-max of the maximum charging current intensity on the part of the drive battery of 500 A is obviously significantly above the actual value I _actual-max of the maximum charging current intensity of 300 A, which the charging device and/or the charging process taking place there can deliver, if in parallel second charging point is occupied. Instead of exactly two charging points, another plurality of charging points 170 can also be present and/or occupied on this charging station 160b, ie on this charging device 150b.

4A shows an exemplary course of the charging current when charging a high-voltage energy storage device of a first vehicle 110a at the first charging point 170a, if the charging device 150b or charging station 160b _{does not have a sufficiently high charging current I when a second vehicle to be charged is} later connected to the other existing charging point 170b ( t) provides more. Apparently the charging station is capable of power splitting, which means that from the time the second vehicle 110b is connected, the setpoint requested by the first 110a is no longer achieved, since part of the charging current is provided to the second vehicle 110b. According to 4A The first vehicle is the only vehicle connected to the charging station 160b until it reaches a charging state SoC, ie a charge of 50%. Coincidentally, a second vehicle is then connected to the other charging point 170b of the same charging device 150b, 160b, as a result of which the time-dependent actual value I _Actual (t) of the charging current, which can be achieved by the charging device and / or the charging process, falls below the time-dependent setpoint I _Target (t) the charging current required by the drive battery decreases. This applies at least to the period during which the state of charge increases from 50% to 60%. Only if the time-dependent setpoint I _target (t) of the charging current intensity drops to below 300 A by chance at a charge level of 60%, will the charging device and/or the charging process there be able to follow the specification again. The period of time during which a second vehicle whose charging history is in 4A is currently not shown, is connected to the other charging point of the same charging station 160b, is in 4A indicated by a broad right arrow. It can be seen that in this example the second vehicle was randomly connected at the time when the first vehicle had reached the state of charge of SoC = 50%.

4B shows an exemplary course of the charging current when charging an energy storage device of the first vehicle 110a when the charging device 150b, 160b at the first charging point 170a only provides a sufficiently high charging current if and/or as long as there is no second one at the same charging device and/or the same charging station vehicle is being charged. Here comes the first vehicle 110a, whose charging history is in 4B is shown, only after the other, second vehicle 110b at the charging station 160b or is only connected to this charging station after this, for example again at its first charging point 170a.

• - entweder der zeitabhängige Sollwert I_Soll (t) der Ladestromstärke seitens der Antriebsbatterie auf einen Wert von 300 A abgesenkt wird
• - und/oder das zweite Fahrzeug 110b den anderen Ladepunkt 170b wieder verlässt,

vermag der zeitabhängige Istwert I_Ist (t) der Ladestromstärke, der seitens der Ladeeinrichtung beim Aufladen des ersten Fahrzeugs erreichbar ist, dieser Vorgabe zu folgen.During the increase in the state of charge of the high-voltage storage device 111 of the first vehicle 110a, the setpoint I _target-max of the maximum charging current intensity, which the drive battery requires or the operator of the charging device promises, can be recognized by the actual value I _actual-max of the maximum charging current intensity, which is determined by the Charging device and / or the charging process is provided in this state of the charging device or charging column 150b, 160b. Only when

• - either the time-dependent setpoint I _setpoint (t) of the charging current on the drive battery is reduced to a value of 300 A
• - and/or the second vehicle 110b leaves the other charging point 170b again,

The time-dependent actual value I _Act (t) of the charging current, which can be achieved by the charging device when charging the first vehicle, can follow this specification.

During the first period of the charging process at the first charging point 170a, in which the required target value corresponds to the maximum value I _target-max of the maximum charging current of 500 A, this value is undercut by the maximum actual value I _actual-max of the charging current of 300 A. One reason for this is that a second vehicle is initially connected to the other charging point, but the charging station has a powersplit function. This is the main cause here. But in addition, according to 4B also that coincidentally, during exactly this period, the first vehicle needs and requests the maximum value I _target-max of the charging current of 500 A; This temporary additional demand cannot be covered during this period due to double occupancy. In the general case, the periods of double occupancy and the requirement for the maximum value I _target-max of the charging current for the first vehicle can also differ in time or only partially overlap in time. In this example, the two possible causes for the deviation only coincide completely by chance.

The measurements that the vehicle's BMS system itself can make include the maximum charging current of the charging point on the charging device, the charging column and/or the charging point or charging cable or plug and the maximum charging current during the deviation between the actual and Setpoint. The battery is preconditioned by the BMS system to an optimal charging temperature for charging in order to enable the absorption of a maximum charging current.

In addition to those based on the 3A until 4B explained conditions B, namely the values of electrical quantities such as current, voltage or electrical charging power, or in addition to this, other conditions B or B '' can also be included; for example those that relate to a parking space provided at the charging facility and/or a service offer for users of a charging facility and/or a motor vehicle. Even this information or conditions can be measured by a motor vehicle or its sensor; For example, the presence of a roof over the charging device by means of a rain sensor in the vehicle or the presence of night-time lighting of the charging device by means of a brightness sensor in the vehicle. The geographical position, ie the geodata of the charging device, can also be recorded by the GPS sensor of the motor vehicle.

In addition to such conditions, customer reviews of previous charging processes at charging facilities can also be recorded as conditions, transmitted to the central authority, kept in its collection and/or later requested or queried by vehicles; as well as other information from the Internet. This also includes information provided on portals of the operators or operator associations of charging facilities and/or information stored somewhere as “swarm knowledge”; such as conditions regarding the presence or absence of a toilet, restaurant or other catering service; if applicable, the distance there; whether the charging facility belongs to a specific charging network; any internet connection at the charging device; the charging costs or pricing (kWh price) at this charging facility; Reviews by other, previous customers and/or the maximum available charging power or other physical information.

• - zur Filterung in Frage kommender Ladeeinrichtungen nach diesen Bedingungen;
• - zur Priorisierung der Ladeeinrichtungen gemäß nach diesen Bedingungen in einer Reihenfolge und/oder Rangfolge; und/oder
• - als Ausschlusskriterium zum Ausschließen oder Zulassen von Ladeeinrichtungen nach diesen Bedingungen.

Any information or conditions used to evaluate and/or select charging devices may be used optionally

• - to filter possible charging devices according to these conditions;
• - to prioritize the charging facilities in accordance with these conditions in a sequence and/or ranking; and or
• - as an exclusion criterion for excluding or allowing charging facilities according to these conditions.

• - als Einzelvorgang betreffend nur eine einzige Ladeeinrichtung,
• - als Mehrfachvorgang betreffend eine Gruppe oder ein Cluster von Ladeeinrichtung oder
• - als Mischung aus beiden.

Each of these options can be used optionally

• - as an individual process concerning only a single charging device,
• - as a multiple operation concerning a group or a cluster of charging devices or
• - as a mixture of both.

• - der Zugehörigkeit zu bestimmten Betreibern oder Betreiberverbänden,
• - dem Modelltyp des Fahrzeugs oder seiner Hochvolt-Batterie,
• - dem Fahrzeughersteller oder
• - nach sonstigen Eigenschaften, Bewertungen und/oder Arten von Bedingungen.

In the case of clustering, the clusters of charging devices to be excluded or permitted can, for example, be formed according to

• - membership of certain operators or operator associations,
• - the model type of the vehicle or its high-voltage battery,
• - the vehicle manufacturer or
• - by other characteristics, ratings and/or types of conditions.

Reference symbols

100

contraption

105

navigation device

110; 110a, ...

Motor vehicle (electrically powered)

111

Energy storage (drive battery)

112

E-SIM card

113

display

114

Audio interface

115

navigation device

116; 116'; 116''

sensor

117

Acquisition unit

118

Storage unit

120

Smartphone

130

central authority

140

collection

150; 150a, ...

Loading facility

160; 160a, ...

Charging station

170a; 170b

charging point

180

system

200

Procedure (for evaluation)

S201, ..., S205

Procedural step

200''

Method (for selecting)

S206''; S207''

Procedural step

B; B'; B''

Condition

E

Property (charging facility)

HV

High-voltage energy storage (drive battery)

Iact (t)

Actual value of the charging current (charging device; charging process)

Iactual max

Actual value of the maximum charging current (charging device; process)

Itarget (t)

Target value of the charging current (drive battery)

Itarget max

Setpoint of the maximum charging current (charging device)

SoC

charging status

t

Charging time

Claims (15)

Method (200) for evaluating a charging device (150; 150a) which is used to charge electrical energy storage devices (111) of electrically driven motor vehicles (110), the method (200) comprising the following steps: - Charging (S201) an energy storage device (111) of a motor vehicle (110; 110a) at a charging device (150; 150a); - Detecting (S202) at least one condition (B) under which the charging device (150; 150a) is used or can be used to charge the energy storage (111) by means of the motor vehicle (110; 110a) and/or a sensor (116; 116'; 116'') or otherwise; and - Transmitting (S203) the recorded condition (B) to a central instance (130) and/or to a collection (140) which collects conditions (B') for a plurality of charging devices (150; 150a; 150b; 150c). their evaluation provides. Procedure (200) according to Claim 1 , further comprising: - collecting (S204) conditions (B; B') that are detected by a plurality of motor vehicles (110; 110a; 110b; 110c) when using a plurality of charging devices (150; 150a; 150b; 150c). were, by the central authority (130) and/or the collection (140); and - evaluating (S205) a charging device of the plurality of charging devices (150; 150a; 150b; 150c) on the basis of several conditions (B; B') provided by the central entity (130) and/or by the collection (140) under which this charging device was used and/or can be used. Procedure (200) according to Claim 1 or 2 , wherein a condition (B; E; L) is detected which is related to the charging process of the energy storage device (111) which took place at the charging device (150; 150a). Method (200) according to one of the preceding claims, wherein the condition (B; E; L) is a maximum charging current intensity at a charging point (170; 170a) of the charging device (150; 150a) and/or its relation to a maximum charging current intensity of the energy storage device ( 111) of the motor vehicle (110; 110a) and/or a provided maximum charging current of a charging point. Method (200) according to one Claim 4 , wherein the maximum charging current strength of a charging point of the charging device (150; 150a) by the motor vehicle (110; 110a) and / or the sensor (116) depending on - a charging power of the charging device (150; 150a), - a charging current strength of the drive battery ( 111), - the charging time and/or - the charge status of the drive battery (111) is determined. Method (200) according to one of the preceding claims, wherein it is determined by the motor vehicle (110; 110a) and/or the sensor (116; 116'; 116''), - whether or not a charging station (160; 160a) provides the charging device (150; 150a) at the charging point with a nominal maximum charging current for multiple use by several charging points (170a; 170b), and/or - what actual maximum charging current strength a charging point provides to the charging station (160; 160a) when the charging station (160; 160a) is used multiple times. Method (200) according to one of the preceding claims, wherein a condition (B) is detected which relates to a parking space provided at the charging device (150; 150a) for the charging process. Method (200) according to one of the preceding claims, wherein a condition (B) is detected which relates to a service offer for users of the charging device (150; 150a) and/or the motor vehicle (110; 110a). Motor vehicle (110; 110a), which can be driven electrically and has a rechargeable electrical energy storage device (111), the motor vehicle (110; 110a) having at least one sensor (116; 116'; 116'') and wherein the motor vehicle (110; 110; 110a) and/or the sensor (116; 116'; 116'') is set up on the occasion of charging the energy storage device (111) at a charging device (150; 150a) - to detect at least one condition (B) under which the charging device (150; 150a) is used and/or can be used at a charging point for charging the energy storage (111), and - the recorded condition (B) to a central instance (130) and/or a collection (140) which has collected conditions (B') for a plurality of charging devices (150; 150a; 150b; 150c) for their evaluation to transfer. Method (200'') for selecting a charging point at a charging device (150; 150a), the method (200'') comprising the following steps: - specifying (S206'') a condition (B'') for a charging point of a charging device to be selected for charging an energy storage device (111) of a motor vehicle (110; 110a) and - Selecting (S207'') a charging point of a charging device (150; 150a). - Comparing the predetermined condition (B'') with conditions (B; B') collected for a plurality of charging devices (150; 150a; 150b; 150c), which are generated by means of motor vehicles (110) and/or sensors (116; 116'; 116'') or otherwise recorded and kept available in a central instance (130) and/or collection (140), and/or by - Querying a rating based on the collected conditions (B; B'). Procedure (500). Claim 10 , whereby the predetermined condition (B'') - a vehicle type of the motor vehicle (110; 110a) or its energy storage device (111), - a condition (E) relating to a charging point on the charging device (150; 150a), - a charging process a condition (L) relating to a charging point of the charging device (150; 150a), - a condition relating to a parking space provided at a charging point of the charging device (150; 150a) and/or - a service offer for users of the charging device (150; 150a) and/or the condition relating to the motor vehicle (110; 110a) is and/or includes. Procedure (500). Claim 10 or 11 , where the predetermined condition (B'';E; L), - a maximum charging current of a charging point the charging device (150; 150a), - a maximum charging current of the energy storage (111) and / or - a maximum charging power of the charging point of the charging device (150; 150a) - a maximum charging current of the charging point during multiple occupancy - a maximum charging power of the charging point during multiple occupancy . Method (500) according to one of the Claims 10 until 12 , wherein the predetermined condition (B'';E; L) includes - whether a charging point at a charging station (160; 160a) of the charging device (150; 150a) has a nominal maximum charging current strength for multiple use by several charging points (170a; 170b). available or not; and/or - what actual maximum charging current the charging station (160; 160a) provides for multiple use. Device (100), set up for selecting a charging device (150; 150a) and/or a charging point of a charging device (150; 150a) by means of a method according to one of Claims 10 until 13 , wherein the device is - a navigation device (105), - a smartphone (120) or other smart device, - a motor vehicle (110) or - another motor vehicle component. System (180) for evaluating and/or selecting charging devices (150; 150a; 150b; 150c) and/or charging points at which electrical energy storage devices (111) of electrically driven motor vehicles (110; 110; 110b; 110c) can be charged, wherein the system (180) includes the following: - a central instance (130) and/or a collection (140) which is set up for a large number of charging devices (150; 150a; 150b; 150c) conditions (B; B'; B'') for their use and/ or to collect and/or keep available assessments of the charging devices (150; 150a; 150b; 150c), and - a number of motor vehicles (110; 110; 110b; 110c), each of which can be driven electrically and has a rechargeable energy storage (111) and at least one sensor (116; 116'; 116''), the respective motor vehicle (110; 110; 110b; 110c) is set up, - a condition (B) recorded at a charging device (150; 150a; 150b; 150c) and/or at a charging point (170a, 170b) for its use to the central entity (130) and/or the collection (140). transmit and/or - conditions (B; B') of the use of charging devices (150; 150a; 150b; 150c) provided there by the central instance (130) and/or the collection (140) for a comparison with a predetermined condition (B'') and/or to retrieve assessments of the charging point and/or the charging devices (150; 150a; 150b; 150c) based thereon.

Images