CN101924377A - A distributed modular DC charging system for electric vehicles - Google Patents

Abstract

The invention relates to a distributed modular DC charging system for electric vehicles. The system includes a background subsystem and a user terminal system. The background subsystem is connected to the user terminal system; the background subsystem includes a high-power rectification module, 1 to 4 DC power supply control modules, 1 to 4 DC output control modules, the user terminal system includes 1 to 4 charging management modules, and the DC output control module passes CAN communication lines, connection confirmation wires, DC The output wire and the six-pin plug are connected to the charged vehicle, and the user terminal system is connected to the DC power supply control module through the CAN communication line. The advantages of the present invention include: modular design concept, easy expansion, DC output control module is set to 30kW, multiple parallel connections can be performed according to needs, and the output power of the equipment is improved. It has good portability, versatility, and scalability. Suitable for various charging systems.

Description

A distributed modular DC charging system for electric vehicles

technical field

The invention relates to an electric vehicle charging system, in particular to a distributed modular DC charging system for an electric vehicle.

Background technique

Facing the huge challenges of energy and environment, the technological change of automobile energy power system has become the focus and core of automobile technology development, which provides a historical opportunity for independent innovation and leapfrog development of my country's automobile industry. Electric vehicles are powered by electricity, can achieve "zero emission" and have low noise, which is an important means to solve energy and environmental problems. The charging device provides energy supply for the operation of electric vehicles. It is an important basic support for electric vehicles and an important link in the commercialization and industrialization of electric vehicles. It has a significant impact on the development of the electric vehicle industry.

Famous automobile manufacturers in countries all over the world (such as France, Japan, the United States, Israel, etc.) are stepping up the development of various electric vehicles and supporting charging devices, and have achieved a certain degree of progress and breakthroughs. Domestically, some colleges and universities and scientific research institutions have also achieved certain results in electric vehicles and supporting charging facilities. During the Beijing 2008 Olympic and Paralympic Games, which attracted worldwide attention, the world's largest electric vehicle battery quick replacement charging station was established to provide charging services for electric vehicles.

However, most of the charging devices currently developed are in the stage of theoretical research and experimentation, and are mainly aimed at specific demonstration projects and specific models, with different technical indicators, no unified standards, incomplete functions, poor portability, and no generalization , Standardized conditions are not conducive to the industrialization of electric vehicles.

Contents of the invention

The object of the present invention is to provide a distributed modular DC charging system for electric vehicles with complete functions and convenient operation in order to overcome the above-mentioned defects in the prior art.

The purpose of the present invention can be achieved through the following technical solutions: a distributed modular DC charging system for electric vehicles, the system includes a background subsystem and a user terminal system, the background subsystem is connected to the user terminal system; the described The background subsystem includes a high-power rectification module, 1 to 4 DC power supply control modules, and 1 to 4 DC output control modules. The positive and negative output terminals of the high-power rectification module are respectively connected to the positive and negative input terminals of the DC power supply control module The positive and negative output terminals of the DC power supply control module are respectively connected to the positive and negative input terminals of the DC output control module. The user terminal system includes 1 to 4 charging management modules, which are characterized in that the The DC output control module is connected to the charged vehicle through the CAN communication line, the connection confirmation wire, the DC output wire and the six-pin plug, and the user terminal system is connected to the DC power supply control module through the CAN communication line.

There are two DC power supply control modules.

There are two DC output control modules.

There are two charging management modules.

Compared with the prior art, the advantages of the present invention include: adopting the concept of modular design, easy to expand capacity, the DC output control module is set to 30kW, multiple units can be connected in parallel according to needs, the output power of the equipment can be improved, and it has good portability, Versatility, scalability, can be applied to a variety of charging systems.

Description of drawings

Fig. 1 is a schematic structural view of a distributed modular DC charging system for an electric vehicle of the present invention;

Fig. 2 is a schematic diagram of a distributed structure of a distributed modular DC charging system for an electric vehicle according to the present invention.

Detailed ways

The present invention will be further described below in conjunction with specific examples.

As shown in Figure 1 and Figure 2, the high-power rectifier module rectifies the three-phase 380V AC power into a DC650V output, which is used as the input of the DC power supply control module, and the DC power supply control module measures the input and accepts the start-up charge from the charging management module Or stop the charging control command, control the on-off of the input terminal of the DC power supply control module, the output terminal of the DC power supply control module is connected with the input terminal of the DC output control module, and the DC output control module obtains the charging information from the on-board battery management system (BMS) through CAN communication ( Including the maximum withstand voltage and current of the battery pack, the current voltage of the battery pack, the SOC of the battery pack, the current required charging current and other information), adopting the control method of constant current limiting voltage and constant voltage limiting current, outputting the voltage and current required by the load, At the same time, the DC output control module sends charging information to the charging management module through CAN communication.

The charging management module adopts the WINCE5.0 operating system development platform, which mainly realizes charging fee collection, charging plug connection detection, charging time selection setting, charging mode selection setting, starting charging control, stopping charging control, charging status display, charging consumption information printing, etc. Function. The software interface process is described as follows:

(1) The main interface is the welcome interface, and the animation prompts the user to insert the card. The interface includes two controls: "use help" and "read card to enter".

(2) When the user inserts the card and clicks "read card to enter", the system reads the card information and performs identification. After the identification is successful, it enters the corresponding operation interface according to the card attribute (administrator card or user card):

If the card is an administrator card, enter the management configuration interface, where you can export charging logs and write configuration information;

If the card is a user card, the system can display the corresponding screen according to the card status: when the card status is initial charging, enter the IC card information interface, and follow the interface prompts to perform operations such as socket connection, charging time selection, and charging mode selection to complete charging settings and Start charging; when the status of the card is charging, it will directly enter the charging status display interface, and the user can stop charging or checkout after charging as needed. After the checkout is completed, the interface will display detailed charging information (including charging mode, Charging time, charging power, consumption amount, consumption date and other information), and can choose to print charging information receipts and other operations.

Claims (4)

1. A distributed modular DC charging system for electric vehicles, the system includes a background subsystem and a user terminal system, the background subsystem is connected to the user terminal system; the background subsystem includes a high-power rectification module, 1 ~4 DC power supply control modules, 1~4 DC output control modules, the positive and negative output terminals of the high-power rectification module are respectively connected to the positive and negative input terminals of the DC power supply control module, and the DC power supply control module The positive and negative output terminals of the DC output control module are respectively connected to the positive and negative input terminals of the DC output control module. The user terminal system includes 1 to 4 charging management modules, and it is characterized in that the DC output control module passes CAN communication lines, The connection confirmation lead, the DC output lead and the six-pin plug are connected to the charged vehicle, and the user terminal system is connected to the DC power supply control module through the CAN communication line. 2. A distributed modular DC charging system for electric vehicles according to claim 1, wherein there are two DC power supply control modules. 3. A distributed modular DC charging system for electric vehicles according to claim 1, wherein there are two DC output control modules. 4. A distributed modular DC charging system for electric vehicles according to claim 1, wherein there are two charging management modules.

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