CN116566004A - A charging device and electronic equipment - Google Patents

Abstract

The application provides a charging device and electronic equipment, include: the wireless charging module is used for providing a first charging voltage for the charging voltage conversion module when wireless charging is performed; the wired charging interface is connected with the charging voltage conversion module through the first switch and is used for providing a second charging voltage for the charging voltage conversion module when wired charging is performed; the second switch is connected with the power supply voltage conversion module to output a third voltage provided by the power supply voltage conversion module; the charging voltage conversion module is used for carrying out voltage conversion on the second charging voltage input by the wired charging interface and outputting the second charging voltage to the battery when wired charging is carried out; when wireless charging is performed, the first charging voltage input by the wireless charging module is subjected to voltage conversion and then output to the battery; and the power supply voltage conversion module is used for converting the voltage of the battery into a third voltage when the wired reverse charging is performed, and outputting the third voltage through the wired charging interface.

Description

A charging device and electronic equipment

technical field

The present application relates to the field of circuit technology, in particular to a charging device and electronic equipment.

Background technique

With the development of wireless charging technology, more and more electronic devices have the wireless charging function. Taking mobile phones as an example, mobile phones manufactured by various mobile phone manufacturers are equipped with wireless charging functions. Wireless charging is often implemented together with wired charging, that is, electronic devices that support wireless charging usually also support wired charging. For this reason, a charging device in an electronic device usually includes a wireless charging module and a wired charging module. Electronic devices that support both wired charging and wireless charging generally also support wired reverse charging and wireless reverse charging. Since the electronic device supports wired charging and wireless charging at the same time, the charging device needs to support too many functions, so more devices and software processes are often required to realize function switching, resulting in more complicated circuit design.

Contents of the invention

Embodiments of the present application provide a charging device and electronic equipment, which are used to reduce the complexity of the charging device while maintaining the functions of the existing charging device.

In a first aspect, the present application provides a charging device including: a wireless charging module, a wired charging interface, a charging voltage conversion module, a power supply voltage conversion module, a first switch and a second switch. Exemplarily, the wireless charging module is configured to provide the charging voltage conversion module with the first charging voltage when receiving a wireless charging control instruction from the central processor;

The wired charging interface is connected to the charging voltage conversion module through the first switch, and is used to provide the second charging voltage for the charging voltage conversion module during wired charging; it is connected to the power voltage conversion module through the second switch, and the power voltage conversion module providing a third voltage output;

The charging voltage conversion module is used to convert the second charging voltage input by the wired charging interface to the battery after receiving the wired charging control command from the central processing unit; outputting the first charging voltage to the battery after voltage conversion;

The power supply voltage conversion module is used to convert the voltage of the battery into a third voltage when receiving the wired reverse charging control command from the central processor, and output the third voltage through the wired charging interface.

Exemplarily, in the embodiment of the present application, the charging voltage conversion module includes at least one of a BUCK module and a charge pump module;

During wired charging or wireless charging, the voltage conversion is performed through the BUCK module or the charge pump module.

In a possible implementation manner, the charging voltage conversion module is also used for:

When receiving the wireless reverse charging control instruction from the central processing unit, the voltage of the battery is converted into a fourth voltage through the BUCK module, and the fourth voltage is output through the wireless charging module.

In a possible implementation manner, the charging voltage conversion module further includes a protection circuit module, and the protection circuit module is used to obtain the charging voltage output from the charging voltage conversion module to the battery;

The charging voltage conversion module is also used for: when the charging voltage is greater than the second threshold, the protection circuit module interrupts the charging of the battery.

In a possible implementation manner, when wired charging is performed, the first switch is in an on state, and when wireless charging is performed, the first switch is in an off state;

When wired reverse charging is performed, the second switch is in an on state, and when wireless reverse charging is performed, the second switch is in an off state.

In a possible implementation manner, the first switch includes two metal-oxide-semiconductor field-effect transistor MOSFETs connected in series.

In a possible implementation manner, the first switch includes a first N-channel metal oxide semiconductor field effect transistor (NMOSFET) and a second NMOSFET;

Wherein, the source of the first NMOSFET is electrically connected to the source of the second NMOSFET, the gate of the first NMOSFET is electrically connected to the gate of the second NMOSFET to form a control terminal of the first switch, and the gate of the first NMOSFET is electrically connected to the gate of the second NMOSFET. The drain is electrically connected to the wired charging interface, and the drain of the second NMOSFET is electrically connected to an input terminal of the charging voltage conversion module.

In a possible implementation manner, the second switch includes two MOSFETs connected in series.

In a possible implementation manner, the second switch includes a first P-channel metal oxide semiconductor field effect transistor (PMOSFET) and a second PMOSFET;

Wherein, the source of the first PMOSFET is electrically connected to the source of the second PMOSFET, the gate of the first PMOSFET is electrically connected to the gate of the second PMOSFET to form a control terminal of the second switch, and the gate of the first PMOSFET is electrically connected to the gate of the second PMOSFET. The drain is electrically connected to the wired charging interface, and the drain of the second PMOSFET is electrically connected to an input terminal of the power voltage conversion module.

In a possible implementation manner, the wired charging interface is a universal serial bus (USB) interface.

In a possible implementation manner, a voltage module is further included between the wireless charging module and the charging voltage conversion module;

The voltage module is used to increase the output voltage of the wireless charging module.

In a possible implementation manner, the ratio between the input voltage and the output voltage of the voltage module is 1:2 or 1:4.

In a possible implementation manner, the wireless charging module supports wireless charging using the Qi standard or the PMA standard of the Power Matters Alliance.

In a possible implementation manner, the central processing unit is located in a system on chip SoC.

In a possible implementation manner, the central processing unit is respectively connected to the wireless charging module, the charging voltage conversion module and the power supply voltage conversion module through an integrated circuit I2C bus.

In a second aspect, the present application further provides an electronic device, including any charging device according to the first aspect.

Description of drawings

Fig. 1 is a schematic structural diagram of a charging device provided by an embodiment of the present application;

FIG. 2 is a schematic connection diagram provided by an embodiment of the present application;

Fig. 3 is a schematic structural diagram of a wireless charging module provided by an embodiment of the present application;

Fig. 4 is a schematic structural diagram of a charging voltage conversion module provided by another embodiment of the present application;

FIG. 5 is a schematic structural diagram of a first switch provided by an embodiment of the present application;

FIG. 6 is a schematic structural diagram of a second switch provided by an embodiment of the present application;

Fig. 7 is a schematic diagram of reverse charging provided by an embodiment of the present application;

FIG. 8 is a schematic structural diagram of another charging device provided by an embodiment of the present application.

Detailed ways

The application will be described in further detail below in conjunction with the accompanying drawings. The specific operation methods in the method embodiments can also be applied to the device embodiments or system embodiments. It should be noted that, in the description of the following embodiments of the present application, "at least one" refers to one or more, wherein a plurality refers to two or more. In view of this, "plurality" may also be understood as "at least two" in the embodiments of the present invention. "And/or" describes the association relationship of associated objects, indicating that there may be three types of relationships, for example, A and/or B may indicate: A exists alone, A and B exist simultaneously, and B exists independently. In addition, the character "/", unless otherwise specified, generally indicates that the associated objects before and after are in an "or" relationship. In addition, it should be understood that in the description of this application, words such as "first" and "second" are only used for the purpose of distinguishing descriptions, and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating or imply order.

In addition, in the embodiments of the present application, the word "exemplary" is used as an example, illustration or description. Any embodiment or design described herein as "example" is not to be construed as preferred or advantageous over other embodiments or designs. Rather, the use of the word example is intended to present concepts in a concrete manner.

It should be noted that the circuit structures and business scenarios described in the embodiments of the present application are for more clearly illustrating the technical solutions of the embodiments of the present application, and do not constitute limitations on the technical solutions provided by the embodiments of the present application.

It should be pointed out that "connection" in the embodiment of this application refers to the electrical connection between the two interfaces, and the corresponding pins of the two interfaces are connected one by one, but the embodiment of the application does not refer to the two interfaces There are not many restrictions on the specific connection mode between them. For example, the connection may be plugging, docking, and the like. Taking insertion as an example, when port 1 is connected to port 2, port 1 may be inserted into port 2, or port 2 may be inserted into port 1.

The charging device provided in the following embodiments of the present application can not only be used to charge the battery inside the electronic device, but also can use the battery as a power source to supply power to the outside, that is, reverse charging. The so-called reverse charging means that an electronic device (such as a mobile phone, a tablet computer, etc.) can use the electric energy stored in its own battery to charge another electronic device (such as another mobile phone) in a wired/wireless manner (such as through a wired Or provide power wirelessly). When using reverse charging in a wired manner, the device to be charged can be connected via a universal serial bus (universal serial bus, USB) active (on the go, OTG) to realize wired reverse charging. When wireless reverse charging is adopted, a wireless charging signal can be transmitted through the coil to realize wireless reverse charging.

The charging device provided by the embodiment of the present application can be applied to various electronic devices including batteries, including but not limited to mobile phones, tablet computers, computers with wireless transceiver functions, virtual reality (virtual reality, VR) terminals, augmented reality (augmented reality) , AR) terminals, wireless terminals in industrial control, wireless terminals in self driving, wireless terminals in remote medical, wireless terminals in smart grid, Wireless terminals in transportation safety, wireless terminals in smart city, wireless terminals in smart home, etc.

As shown in FIG. 1 , it is a schematic structural diagram of a charging device provided by an embodiment of the present application. FIG. 1 shows the main modules of the charging device provided by the present application, including a wireless charging module 101 , a wired charging interface 102 , a first switch 103 , a charging voltage conversion module 104 , a second switch 105 and a power supply voltage conversion module 106 .

In an embodiment of the present application, the wireless charging module 101 , the charging voltage conversion module 104 and the power supply voltage conversion module 106 can be controlled by the central processing unit to work.

Specifically, when wireless charging is required, for example, when the central processing unit detects a wireless charging signal through a coil, the central processing unit may send a wireless charging control command to the wireless charging module 101, thereby instructing the wireless charging module 101 to perform wireless charging.

When wireless reverse charging is required, for example, when the central processor detects a wireless reverse charging request sent by an external device through a coil, the central processor can send a wireless reverse charging control command to the wireless charging module 101, thereby instructing the wireless The charging module 101 performs wireless reverse charging.

Wherein, when performing wireless charging, the wireless charging module 101 obtains electric energy through a coil to provide a charging voltage for the battery. When performing wireless reverse charging, the wireless charging module 101 charges other devices with the electric energy provided by the battery through the coil.

Further, when wired charging is required, for example, when the central processing unit detects that the wired charging interface 102 is connected to an external charger, the central processing unit sends a wired charging control command to the charging voltage conversion module 104, thereby instructing the charging voltage conversion module 104 to 104 converts the voltage input by the wired charging interface 102 into a charging voltage for charging the battery.

When wired reverse charging is required, for example, when the central processing unit detects a wired reverse charging request sent by an external device connected to the wired charging interface 102, the central processing unit sends a wired reverse charging control to the charging voltage conversion module 104. command, thereby instructing the charging voltage conversion module 104 to convert the voltage provided by the battery into a charging voltage for charging the device connected to the wired charging interface 102 .

It should be noted that the central processing unit may be independent of the charging device shown in FIG. 1. For example, when the charging device shown in FIG. SoC). The SOC can be used for operations such as processing instructions and processing data in computer software.

The central processing unit may be connected with various modules in the charging device, as shown in FIG. 2 , for example. In FIG. 2 , the central processing unit may be connected to the wireless charging module, the charging voltage conversion module, the power supply voltage conversion module and the voltage module through an integrated circuit bus (Inter-Integrated Circuit, I2C) bus.

The central processing unit can transmit control instructions to the wireless charging module, the charging voltage conversion module, the power supply voltage conversion module and the voltage module through the I2C bus.

The central processing unit may also be connected to the first switch and the second switch, so as to control the first switch and the second switch to be turned on or off.

The wireless charging module 101 is connected to the output end of the coil 108 and connected to one end of the charging voltage conversion module 104 . When the electronic device performs wireless charging, the wireless charging module 101 can provide the charging voltage conversion module 104 with a charging voltage, which is referred to as a first charging voltage for convenience of description. The first charging voltage provided by the wireless charging module 101 is relatively high, and cannot directly charge the battery 107 . The charging voltage converting module 104 can convert the first charging voltage provided by the wireless charging module 101 into a voltage suitable for charging the battery 107 .

In some other embodiments, a voltage module 109 may be included between the wireless charging module 101 and the charging voltage conversion module 104, or a plurality of voltage modules 109 connected in series. Figure 1 takes a voltage module as an example for illustration. The voltage module 109 can increase the output voltage of the wireless charging module 101, and the ratio between the input voltage and the output voltage of the voltage module 109 can include but not limited to 1:2 or 1:4. By increasing the output voltage of the wireless charging module 101, the wireless charging power level can be increased, and the efficiency of wireless charging can be improved. The specific implementation manner of the voltage module 109 is not limited in the embodiment of the present application, and will not be repeated here.

The wired charging interface 102 is connected to the charging voltage conversion module 104 through the first switch 103, and is used to provide the charging voltage for the charging voltage conversion module 104 during wired charging. For the convenience of description, the charging voltage is referred to as the first 2. Charging voltage. Similarly, the second charging voltage provided by the wired charging interface 102 is relatively high, and cannot directly charge the battery 107 . The charging voltage converting module 104 can convert the second charging voltage into a voltage suitable for charging the battery 107 .

The embodiment of the present application does not limit the specific type of the wired charging interface 102. For example, the wired charging interface 102 can be a Universal Serial Bus (Universal Serial Bus, USB) interface, such as a USB type-c interface, or a Micro (Micro ) Type B USB interface and other interfaces that conform to the USB standard specification.

When the wired charging interface 102 is a USB interface, it may include a ground (GND) pin, a trigger pin, a data positive (DP) pin, a data negative (DM) pin and a power supply bus (VBUS) pin. Wherein, the DP pin may also be called a D+ pin, and the DM pin may also be called a D− pin. Each of the above-mentioned pins has different functions, which specifically include referring to descriptions in the prior art, and will not be repeated here.

The wired charging interface 102 can also be other types of interfaces, such as lightning (lightning) interface, etc., which will not be repeated here.

In some other embodiments, the above-mentioned wired charging interface 102 may also be connected to the power voltage conversion module 106 through the second switch 105 . When wired charging is performed, the first switch 103 is in an on state, and when wireless charging is performed, the first switch 103 is in an off state; correspondingly, when wired reverse charging is performed, the second switch 103 105 is in an on state, and when performing wireless reverse charging, the second switch 105 is in an off state.

It should be understood that when the battery 107 is being charged, the wired charging interface 102 can be used to connect to a charger to receive electric energy provided by the outside. When supplying power to the outside, that is, when charging in reverse, the wired charging interface 102 is connected to other electronic devices, and the wired charging interface 102 can also output electric energy to charge other electronic devices.

The power voltage conversion module 106 is connected to the battery 107 at one end and to the second switch 105 at the other end. When wired reverse charging is performed, the power supply voltage conversion module 106 can convert the voltage provided by the battery 107 and output it to the charged device through the wired charging interface 102 .

It should be noted that there may be some peripheral circuits that cooperate with the above-mentioned modules in the charging device in FIG. 1 . The specific implementation of these peripheral circuits is not limited by the embodiment of the present application and will not be shown here. The function and structure of each module in the charging device will be described respectively below.

In the embodiment of the present application, the coil 108 supports wireless forward charging and wireless reverse charging. Wherein, the wireless forward charging refers to converting the received wireless charging signal into a charging voltage for charging the battery in a wireless manner, and charging the battery through the charging voltage. Wireless reverse charging refers to using the electric energy stored in the battery to charge another electronic device (such as another mobile phone) wirelessly.

During wireless forward charging, the coil 108 is used to receive the electromagnetic wave generated by the wireless charging transmitting coil on the wireless charger, and convert the received electromagnetic wave into current based on the principle of electromagnetic induction or electromagnetic resonance, and output it to the wireless charging module 101 . During wireless reverse charging, the coil 108 is used to convert the current provided by the wireless charging module 101 into electromagnetic waves and emit them.

The coil 108 is usually provided with a protective layer, a coil layer, an adhesive layer and a shielding layer successively on the substrate, wherein the protective layer is used to prevent the metal coil in the protective layer from being corroded by water vapor and external stress, and can insulate the metal coil , the adhesive layer is used to fix the shielding layer on the coil layer. The coil layer may be in the form of a flexible printed circuit (FPC) or wire winding, and the shielding material in the shielding layer may be in the form of nanocrystalline or ferrite, or other forms, which are not limited in the embodiment of the present application.

The above are just examples, and the specific structure of the coil 108 may also exist in other forms, which are not limited by the embodiment of the present application.

In the embodiment of the present application, when performing wireless charging for the battery, the wireless charging module 101 can convert the AC power output by the coil 108 into a DC power, and then output the voltage to the charging voltage conversion module 104 after voltage conversion.

When wireless reverse charging is performed, the wireless charging module 101 can convert the DC power reversely output by the charging voltage conversion module 104 into AC power, and output the voltage to the coil 108 after voltage conversion.

The structure of the wireless charging module 101 may be shown in FIG. 3 . The wireless charging module 101 shown in FIG. 3 may include a rectifier bridge 201 , an inverter bridge 202 and a main low dropout regulator (low dropout regulator, LDO) 203 .

When wirelessly charging the battery, the AC power provided by the coil 108 can be converted into DC power through the rectifier bridge 201 . Correspondingly, when performing wireless reverse charging, the DC power provided by the charging voltage conversion module 104 can be converted into AC power through the inverter bridge 202 .

Furthermore, the quality of the power converted into direct current may not be good enough, and the amplitude may fluctuate easily. After being processed by the main LDO203, a voltage with stable amplitude and the function of current limiting and voltage limiting can be obtained. Of course, this embodiment of the present application is not limited to using the main LDO 203 to implement the above functions, and there is no specific limitation thereto.

The wireless charging module 101 can support wireless charging using various wireless charging standards, including but not limited to Qi standard, Power Matters Alliance (Power Matters Alliance, PMA) standard and the like.

In addition to the above modules, the wireless charging module 101 may also include a communication module 204, a power supply module 205, a protection module 206, a processing module 207, a storage module 208, a detection module 209 and the like. The connection relationship among the various modules included in the wireless charging module 101 is not limited by the embodiment of the present application, and for details, reference may be made to the description in the prior art, which will not be repeated here. The functionality of these modules is described below.

The power supply module 205 can provide various modules inside the wireless charging module 101 with voltage required for operation.

The communication module 204 is configured to analyze various wireless charging standards, such as Wireless Power Consortium (English: Wireless Power Consortium, WPC for short) standards and the like.

The processing module 207 can control the operation, timing and input and output status of each module inside the wireless charging module 101 .

The storage module 208 can store data and configuration information related to wireless charging.

The detection module 209 can detect information such as current, voltage and temperature of each module inside the wireless charging module 101 .

The protection module 206 can provide overvoltage, short circuit, overcurrent, overtemperature and other protection functions according to the current, voltage and temperature detected by the detection module 209 to ensure that the wireless charging module 101 will not be damaged.

It should be noted that the above are just examples, and the structure of the wireless charging module 101 is not limited to the structure shown in FIG. 2 , and no further examples are given here.

In some embodiments of the present application, the charging voltage conversion module may also be called a charging integrated circuit (Integrated Circuit, IC), and the embodiment of the present application does not limit the name of the charging voltage conversion module.

In some embodiments of the present application, the structure of the charging voltage conversion module 104 may be as shown in FIG. 4 . The charging voltage conversion module 104 shown in FIG. 4 may include a BUCK module 301 , a charge pump module 302 , a detection module 303 , a protocol module 304 , a protection circuit module 305 and a control module 306 .

Wherein, FIG. 4 is only an example. In the embodiment of the present application, the charging voltage conversion module 104 may also include only one of the BUCK module 301 and the charge pump module 302 , for example, only include the BUCK module 301 . Alternatively, both the BUCK module 301 and the charge pump module 302 may not be integrated in the charging voltage conversion module 104, but are implemented by separate chips outside the charging voltage conversion module 104, for example, the charging voltage conversion module 104 includes a BUCK module 301 , but in addition to the charging voltage conversion module 104, a discrete chip corresponding to the charge pump module 302 is also included; or a combination of multiple BUCK modules and charge pump modules is used, which is not limited in this embodiment of the present application.

It should be noted that the charging voltage conversion module 104 may include other modules besides the above modules, which is not limited in this embodiment of the present application. The connection relationship among the various modules included in the charging voltage conversion module 104 is not limited by the embodiment of the present application, and details can be referred to the description in the prior art, which will not be repeated here. The functionality of these modules is described below.

Since the first charging voltage provided by the wireless charging module 101 or the second charging voltage input through the wired charging interface 102 is relatively high, the first charging voltage or the second charging voltage cannot be directly used as the charging voltage of the battery when charging the battery. For this reason, the charging voltage conversion module 104 can convert the input higher voltage into a lower voltage, so as to avoid excessive charging voltage for the battery.

The BUCK module 301 in the charging voltage conversion module 104 can realize voltage conversion. When charging the battery, the BUCK module 301 can convert the first charging voltage provided by the wireless charging module 101 or the second charging voltage input through the wired charging interface 102 into a low voltage matching the battery for charging the battery.

Further, the BUCK module 301 can also convert low voltage to high voltage. Specifically, the BUCK module 301 can convert the voltage of the battery into a fourth voltage, the fourth voltage is greater than the voltage of the battery, and output the fourth voltage through the wireless charging module 101, thereby realizing wireless reverse charging.

In the charging voltage conversion module 104 , voltage conversion can also be implemented by the charge pump module 302 .

The charge pump module 302 adopts capacitor charging and discharging, and utilizes the principle that the voltage at both ends of the capacitor cannot change abruptly to realize step-up or step-down. The biggest feature of the charge pump module 302 is that the ratio of the input voltage to the output voltage is fixed, because the voltage ratio is fixed, so as the battery voltage rises during the charging process, the detection module 303 and the control module 306 need to cooperate to keep the input voltage basically constant. ratio.

In the embodiment of the present application, when the charging voltage conversion module 104 includes a BUCK module 301 and a charge pump module 302, when charging the battery, the BUCK module 301 or the charge pump module 302 can be used for voltage conversion according to actual conditions.

For example, which module to use for voltage conversion can be determined according to multiple factors such as the current magnitude of the charging voltage conversion module 104 , battery voltage, temperature, charger, and charging line. For example, when the battery voltage is low and the charging voltage conversion module 104 and the charging line support the fast charging protocol, the charge pump module 302 can be used for voltage conversion.

It should be noted that the charging efficiency of the charge pump module 302 is higher than that of the BUCK module 301 , so the charge pump module 302 can be preferentially used for voltage conversion to charge the battery. When the battery is charging, when the power is high, the voltage of the battery will also increase. Since the ratio of the input voltage to the output voltage of the charge pump module 302 is a fixed value, when the voltage of the battery is too high for the charge pump module 302 to perform voltage conversion according to the fixed value, it can switch to the BUCK module 301 for voltage conversion.

Detection module 303 : detecting the working status of the charging voltage conversion module 104 such as the input voltage, input current, output voltage, and output current.

Protocol module 304 : used to analyze the protocol for communication between the charging voltage conversion module 104 and the electronic device, the Universal Serial Bus (USB) protocol, the Power Delivery (PD) protocol, and the fast charging protocol.

Protection circuit module 305 : according to information such as current and voltage detected by the detection module 303 , provide protection functions such as overcurrent, overvoltage, overtemperature, and short circuit for the charging voltage conversion module 104 .

Control module 306: During the entire charging process, control the current and voltage output by the charging voltage conversion module 104, etc.

In the embodiment of the present application, the first switch 103 may be implemented by a Metal Oxide Semiconductor Field-Effect Transistor (MOSFET) transistor, for example, the first switch 103 may include two MOSFET transistors connected in series. Realized by MOSFET, it can ensure low impedance and better charging effect.

When the first switch 103 includes two MOSFETs connected in series, the two MOSFETs may be P-channel Metal Oxide Semiconductor Field-Effect Transistors (P-channel Metal Oxide Semiconductor Field-Effect Transistor, PMOSFET) or N-channel metal Oxide semiconductor (N-channel Metal Oxide Semiconductor Field-Effect Transistor, N MOSFET) tube.

For example, when the two series-connected MOSFETs included in the first switch 103 are NMOSFETs, they may include the first NMOSFET and the second NMOSFET. Specifically, as shown in FIG. 5 , it is a schematic structural diagram of a first switch provided in the embodiment of the present application. In FIG. 5 , the first switch 103 includes a first NMOSFET 1031 and a second NMOSFET 1032 . The source of the first NMOSFET 1031 is electrically connected to the source of the second NMOSFET 1032, and the gate of the first NMOSFET 1031 is electrically connected to the gate of the second NMOSFET 1032 to form the first switch 103 The drain of the first NMOSFET 1031 is electrically connected to the wired charging interface, and the drain of the second NMOSFET 1032 is electrically connected to an input terminal of the charging voltage conversion module. In FIG. 5 , when the control terminal of the first switch 103 inputs a high level, the first switch 103 is in an on state; when the control terminal of the first switch 103 inputs a low level, the first switch 103 is in an off state.

In the embodiment of the present application, the second switch 105 may also include two MOSFETs connected in series. When the second switch 105 includes two MOSFETs connected in series, the two MOSFETs may be PMOSFETs or NMOSFETs.

For example, when the two series-connected MOSFETs included in the second switch 105 are PMOSFETs, they may include the first PMOSFET and the second PMOSFET. Specifically, as shown in FIG. 6 , it is a schematic structural diagram of a second switch provided in the embodiment of the present application. In Fig. 6, the source of the first PMOSFET 1051 is electrically connected to the source of the second PMOSFET 1052, and the gate of the first PMOSFET 1051 is electrically connected to the gate of the second PMOSFET 1052 to form the The control end of the first switch, the drain of the first PMOSFET 1051 is electrically connected to the wired charging interface 102, the drain of the second PMOSFET 1052 is electrically connected to an input end of the power supply voltage conversion module 106 connect. In Fig. 6, when the control terminal of the second switch 105 inputs a low level, the gates of the first PMOSFET 1051 and the second PMOSFET 1052 are connected to the low level at the same time, and the first PMOSFET 1051 and the second PMOSFET 1052 will simultaneously conduct is turned on, the second switch 105 is turned off and is in a conducting state, thereby forming a path among the wired charging interface 102 , the first PMOSFET 1051 , the second PMOSFET 1052 , and the power voltage conversion module 106 .

When the control terminal of the second switch 105 inputs a high level, the gates of the first PMOSFET 1051 and the second PMOSFET 1052 are connected to a high level at the same time, and the first PMOSFET 1051 and the second PMOSFET 1052 are simultaneously disconnected, and the second The switch 105 is in an off state, thereby forming an open circuit between the wired charging interface 102 , the first PMOSFET 1051 , the second PMOSFET 1052 , and the power voltage conversion module 106 .

In some embodiments of the present application, the control end of the second switch 105 may include an NMOSFET 1053 . The source of the NMOSFET 1053 is grounded, the drain of the NMOSFET 1053 is connected to the gates of the first PMOSFET 1051 and the second PMOSFET 1052, and when the gate of the NMOSFET 1053 is connected to a high level, the source of the NMOSFET 1051 is connected to the gate of the second PMOSFET 1052. Conduction between the drains, so that the first PMOSFET tube 1051 and the second PMOSFET tube 1052 will be grounded at the same time, so that the first PMOSFET tube 1051 and the second PMOSFET tube 1052 will be turned on at the same time; the gate of the NMOSFET tube 1053 is connected to a low voltage Normally, the source and drain of the NMOSFET 1051 are disconnected, so that the first PMOSFET 1051 and the second PMOSFET 1052 are turned on at the same time.

In the above circuit, since there is a delay of several milliseconds when the NMOSFET and PMOSFET are turned on, after the NMOSFET 1053, the first PMOSFET 1051 and the second PMOSFET 1052 are turned on in turn, the charging from the wired charging interface 102 can be realized. The discharge of electrostatic charges, so as to achieve electrostatic protection, so as to avoid the impact of static electricity on the circuit.

The power supply voltage conversion module 106 may also be called a BOOST boost circuit module or the like. The charging device provided in the embodiment of the present application can also support wired reverse charging. During wired reverse charging, because the voltage of the battery 107 is low, it cannot meet the voltage requirements of the wired reverse power supply. It is necessary to use the power supply voltage conversion module 106 to boost the voltage of the battery so that the battery can be used as a power supply for external power supply. The embodiment of the present application does not limit the specific circuit of the power supply voltage conversion module 106 , for details, reference may be made to the description in the prior art, which will not be repeated here.

Battery 107: The battery 107 in the embodiment of the present application may be a lithium battery or a battery made of other materials, which is not limited in the embodiment of the present application.

Combined with the foregoing description, the charging device provided by the embodiment of the present application can realize the following functions:

1. Wired charging.

When performing wired charging, the first switch 103 is turned on, the second switch 105 is turned off, and the wired charging interface 102 is connected to an external power supply to provide the charging voltage conversion module 104 with a second charging voltage. The charging voltage conversion module 104 converts the second charging voltage into a lower voltage required for charging the battery 107 , and charges the battery 107 through the converted voltage.

2. Wireless charging.

When performing wireless charging, the first switch 103 is in an off state, and the second switch 105 is in an off state.

The wireless charging module 101 provides the charging voltage converting module 104 with a first charging voltage. The charging voltage converting module 104 converts the first charging voltage into a lower voltage required for charging the battery 107 and charges the battery 107 through the converted voltage.

3. Wireless reverse charging.

In the embodiment of the present application, the electronic device that provides power is referred to as a host device, and the electronic device to be charged may be referred to as a slave device.

When performing wireless reverse charging, the first switch 103 is in an off state, and the second switch 105 is in an off state. The charging voltage conversion module 104 converts the voltage of the battery into a higher voltage, namely the third voltage. The current provided by the charging voltage conversion module 104 is DC. Therefore, the wireless charging module 101 converts the DC power into AC power, and then converts it into a wireless signal through the coil 108 and transmits it to the electronic device to be charged, that is, the slave device.

4. Wired reverse charging.

The wired reverse charging process can also be called the OTG charging process. During OTG charging, the first switch 103 is in an off state, and the second switch 105 is in an on state. The wired charging interface 102 of the master device is connected to the charging interface of the slave device through a charging cable. After the master device determines to connect the slave device, it can convert the voltage of the battery to a higher voltage through the power supply voltage conversion module 106 and charge the slave device through the wired charging interface 102 .

Exemplarily, as shown in FIG. 7 , the master device 601 charges the slave device 602 . Before charging, the wired charging interface 102 of the master device 601 is connected to the charging interface 603 of the slave device through a charging cable 604 . During OTG charging, the master device 601 can output power from the wired charging interface 102 to the charging line 604 , and the power received by the charging line 604 is transmitted to the charging interface 603 of the slave device 602 . The slave device 602 can then use the electric energy input by the charging interface 603 to work or charge. It should be pointed out that the shape of the charging line 604 in the embodiment of the present application can be linear or non-linear such as square or circular, and the shape of the charging line 604 is not limited in the embodiment of the present application.

In combination with the foregoing description, the following describes the strategy when the charging device provided by the embodiment of the present application implements two functions at the same time, specifically refer to Table 1.

Table 1

It can be seen from Table 1 that when wireless charging and wired charging are performed at the same time, because the efficiency of priority charging is higher than that of wireless charging, wired charging can be prioritized.

From Table 1, it can be known that the charging device provided by the embodiment of the present application can provide functions of wireless reverse charging and wired reverse charging at the same time; it can also provide functions of wireless charging and wired reverse charging at the same time.

In addition, when wireless reverse charging and wired charging are performed at the same time, the electric energy required for wireless reverse charging can be obtained through wired charging. Specifically, in this case, the electric energy input by the wired charging interface 102 is not only output to the battery 107, but the electric energy input from the wired charging interface 102 is also output to the wireless charging module 101 through the first switch 103, and finally output to the charged battery through the coil 108. The power of the device, that is, the wireless reverse charging is not provided by the battery 107 , but by the wired charging interface 102 . It should be noted that in this case, the power of wireless reverse charging needs to be lower than that of wired charging, otherwise wireless reverse charging and wired charging cannot be performed at the same time.

From the foregoing description, it can be seen that the charging device provided by the embodiment of the present application can satisfy functions such as wireless forward charging, wireless reverse charging, wired forward charging, wired reverse charging, etc. The structure of the charging device provided by the embodiment of the present application is simple, Realize low-cost design, reduce control process, and improve charging efficiency.

It can be understood that the embodiment of the present application does not limit the specific structure of the charging device shown in FIG. 1 . In other embodiments of the present application, the charging device may further include more or less components than those shown in FIG. 1 . For example, as shown in FIG. 8 , on the basis of FIG. 1 , the charging device provided by the embodiment of the present application may further include a third switch 110 and a fourth switch 111 .

Wherein, in FIG. 8 , the voltage module 109 may or may not exist, which is not limited in this embodiment of the present application.

When the voltage module 109 does not exist, the wireless charging module 101 is connected to the charging voltage conversion module 104 through the third switch 110 ; the wireless charging module 101 is connected to the power voltage conversion module 106 through the fourth switch 111 .

When wireless charging is not performed, the third switch 110 can be controlled to be turned off; when wireless charging is performed, the third switch 110 can be controlled to be turned on, so that the wireless charging module 101 provides the electric energy required for battery charging.

Correspondingly, when wireless reverse charging is not performed, the fourth switch 111 can be controlled to be turned off; when wireless reverse charging is performed, the fourth switch 111 can be controlled to be turned on, so that the power supply voltage conversion module 106 can convert the voltage of the battery to After conversion, it is output to the wireless charging module 101, so that the wireless charging module 101 can provide the electric energy required for wireless reverse charging.

For the specific implementation manners of the third switch 110 and the fourth switch 111 , reference may be made to the implementation manners of the first switch 103 or the second switch 105 , which will not be repeated here.

In an embodiment of the present application, an electronic device is also provided, including the charging device shown in FIG. 1 above. An electronic device may also be called user equipment (UE), access terminal, subscriber unit, subscriber station, mobile station, remote station, remote terminal, mobile device, user terminal, user agent, or user device. In practical applications, the terminal device in the embodiment of the present application may be a mobile phone, a tablet computer (Pad), a computer with a wireless transceiver function, a virtual reality (virtual reality, VR) terminal, an augmented reality (augmented reality) , AR) terminals, wireless terminals in industrial control, wireless terminals in self driving, wireless terminals in remote medical, wireless terminals in smart grid, Wireless terminals in transportation safety, wireless terminals in smart city, wireless terminals in smart home, etc. The embodiments of the present application do not limit the application scenarios.

It can be understood that, the embodiment of the present application does not limit the specific structure of the electronic device. In other embodiments of the present application, the electronic device may include more or fewer components than those shown in FIG. 1 , or combine certain components, or separate certain components, or arrange different components.

For example, an electronic device may also include a central processing unit, an external memory interface, an internal memory, an antenna, a mobile communication module, a wireless communication module, an audio module, a speaker, a receiver, a microphone, an earphone jack, a sensor module, buttons, a motor, an indicator, A camera, a display screen, and a subscriber identification module (subscriber identification module, SIM) card interface, etc. Among them, the sensor module may include a pressure sensor, a gyroscope sensor, an air pressure sensor, a magnetic sensor, an acceleration sensor, a distance sensor, a proximity light sensor, a fingerprint sensor, a temperature sensor, a touch sensor, an ambient light sensor, a bone conduction sensor, and the like.

Those skilled in the art should understand that the embodiments of the present application may be provided as methods, systems, or computer program products. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, optical storage, etc.) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to the present application. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a An apparatus for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

Apparently, those skilled in the art can make various changes and modifications to the present application without departing from the scope of the present application. In this way, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims (25)

1. A charging device, characterized in that the charging device is applied to electronic equipment, and the charging device includes: a wireless charging module, a wired charging interface, a charging voltage conversion module, a power supply voltage conversion module, a first switch, a second a switch, a third switch and a fourth switch; The wired charging interface is connected to the charging voltage conversion module through the first switch, and is connected to the power voltage conversion module through the second switch; the wireless charging module is connected to the charging voltage conversion module through the third switch. The charging voltage conversion module is connected, and is connected to the power supply voltage conversion module through the fourth switch; The power supply voltage conversion module is used to convert the voltage provided by the battery when the electronic device is performing wired reverse charging and wireless reverse charging at the same time; The wireless charging module is configured to receive the electric energy provided by the power voltage conversion module when the electronic device is performing wired reverse charging and wireless reverse charging at the same time; The wired charging interface is used to output the electric energy provided by the power supply voltage conversion module when the electronic device is performing wired reverse charging and wireless reverse charging at the same time. 2. The charging device according to claim 1, wherein the wired charging interface is also used to provide a second charging voltage for the charging voltage conversion module when the electronic device is wired charging; The charging voltage conversion module is further configured to convert the second charging voltage input from the wired charging interface and output it to the battery during wired charging. 3. The charging device according to claim 1 or 2, wherein the charging voltage conversion module is also used to convert the voltage of the battery to a third voltage when the electronic device performs wireless reverse charging. Voltage; The wireless charging module is further configured to receive the third voltage when performing wireless reverse charging. 4. The charging device according to claim 1 or 2, wherein the power conversion module is also used to convert the voltage provided by the battery and output it when the electronic device performs wireless reverse charging Electric energy is sent to the wireless charging module; The wireless charging module is further configured to receive the voltage provided by the power supply voltage conversion module when the electronic device is performing wireless reverse charging, and provide electric energy required for wireless reverse charging. 5. The charging device according to any one of claims 1-4, characterized in that the charging voltage conversion module is also used to convert the voltage provided by the battery when the electronic device performs wired reverse charging. voltage conversion; The wired charging interface is also used to output the electric energy provided by the charging voltage conversion module when the electronic device is performing wired reverse charging, and charge the device connected to the wired charging interface. 6. The charging device according to any one of claims 1-4, characterized in that, the power supply voltage conversion module is also used to convert the power provided by the battery when the electronic device performs wired reverse charging voltage conversion; The wired charging interface is also used for outputting the electric energy provided by the power supply voltage conversion module when the electronic device is performing wired reverse charging, and charging the device connected to the wired charging interface. 7. The charging device according to any one of claims 1-6, characterized in that, The wired charging interface is also used to connect to an external power supply when the electronic device performs wired charging and wireless reverse charging at the same time; The charging voltage conversion module is further configured to convert the second charging voltage provided by the wired charging interface to charge the battery when the electronic device is performing wired charging and wireless reverse charging at the same time; The power supply voltage conversion module is also used to convert the voltage provided by the battery and output electric energy to the wireless charging module when the electronic device performs wired charging and wireless reverse charging at the same time; The wireless charging module is also used to receive the voltage provided by the power supply voltage conversion module when the electronic device is performing wired charging and wireless reverse charging at the same time, and provide electric energy required for wireless reverse charging. 8. The charging device according to any one of claims 1-7, characterized in that, the charging device further comprises a coil; The wireless charging module is also used to convert the alternating current output by the coil into direct current and provide the first charging voltage for the charging voltage conversion module when the electronic device is performing wireless charging and wired reverse charging at the same time; The charging voltage conversion module is further configured to convert the first charging voltage provided by the wireless charging module to output electric energy to the battery when the electronic device is performing wireless charging and wired reverse charging at the same time; The power supply voltage conversion module is also used to convert the voltage provided by the battery into a first voltage when the electronic device is performing wireless charging and wired reverse charging at the same time, so that the battery can be used as a power supply for external power supply ; The wired charging interface is also used to output the first voltage provided by the power supply voltage conversion module to output electric energy when the electronic device is performing wireless charging and wired reverse charging at the same time. 9. The charging device according to any one of claims 1-8, wherein the charging voltage conversion module includes at least one of a BUCK module and a charge pump module; When performing wired charging or wireless charging, voltage conversion is performed by the BUCK module or the charge pump module. 10. The charging device according to claim 9, wherein the charging voltage conversion module is further used for: When receiving the wireless reverse charging control instruction from the central processing unit, the voltage of the battery is converted into the second voltage through the BUCK module, and the second voltage is output through the wireless charging module. 11. The charging device according to any one of claims 1 to 10, characterized in that, the charging voltage conversion module further includes a protection circuit module, and the protection circuit module is used to obtain the output of the charging voltage conversion module to the The charging voltage of the battery; The charging voltage conversion module is also used for: when the charging voltage is greater than a second threshold, the charging of the battery is interrupted by the protection circuit module. 12. The charging device according to any one of claims 1 to 11, characterized in that, when wired charging is performed, the first switch is in an on state, and when wireless charging is performed, the first switch is turned off state; When wired reverse charging is performed, the second switch is in an on state, and when wireless reverse charging is performed, the second switch is in an off state. 13. The charging device according to any one of claims 1 to 12, wherein the first switch comprises two metal oxide semiconductor field effect transistor MOSFETs connected in series. 14. The charging device according to claim 13, wherein the first switch comprises a first N-channel metal-oxide-semiconductor field-effect transistor (NMOSFET) and a second NMOSFET; Wherein, the source of the first NMOSFET is electrically connected to the source of the second NMOSFET, and the gate of the first NMOSFET is electrically connected to the gate of the second NMOSFET to form the first NMOSFET. At the control end of the switch, the drain of the first NMOSFET is electrically connected to the wired charging interface, and the drain of the second NMOSFET is electrically connected to an input terminal of the charging voltage conversion module. 15. The charging device according to any one of claims 1 to 14, wherein the second switch comprises two MOSFETs connected in series. 16. The charging device according to claim 15, wherein the second switch comprises a first P-channel metal-oxide-semiconductor field-effect transistor (PMOSFET) and a second PMOSFET; Wherein, the source of the first PMOSFET is electrically connected to the source of the second PMOSFET, and the gate of the first PMOSFET is electrically connected to the gate of the second PMOSFET to form the second PMOSFET. At the control end of the switch, the drain of the first PMOSFET is electrically connected to the wired charging interface, and the drain of the second PMOSFET is electrically connected to an input end of the power voltage conversion module. 17. The charging device according to any one of claims 1 to 16, wherein the wired charging interface is a Universal Serial Bus (USB) interface. 18. The charging device according to any one of claims 1 to 17, wherein a voltage module is further included between the wireless charging module and the charging voltage conversion module; The voltage module is used to increase the output voltage of the wireless charging module. 19. The charging device according to claim 18, wherein the ratio between the input voltage and the output voltage of the voltage module is 1:2 or 1:4. 20. The charging device according to any one of claims 1 to 19, wherein the wireless charging module supports wireless charging using the Qi standard or the Power Matters Alliance PMA standard. 21. The charging device according to any one of claims 1 to 20, wherein the central processing unit is located in a system on chip (SoC). 22. The charging device according to any one of claims 1 to 21, wherein the central processing unit communicates with the wireless charging module, the charging voltage conversion module and the power supply voltage conversion module through an integrated circuit I2C bus. module connection. 23. The charging device according to any one of claims 1-22, wherein the power conversion module is a BOOST boost circuit module. 24. An electronic device, characterized by comprising the charging device according to any one of claims 1-23. 25. A system, characterized by comprising a first device, a second device and a third device; The first device includes a coil and the charging device according to any one of claims 1-23, the coil is connected to a wireless charging module of the charging device; The first device is connected to the second device through a charging cable, and is used to charge the second device when the first device performs wired reverse charging and wireless reverse charging at the same time; The first device is further configured to charge the third device through the coil when the first device is performing wired reverse charging and wireless reverse charging at the same time.