CN216002227U

CN216002227U - Charging machine

Info

Publication number: CN216002227U
Application number: CN202121891452.5U
Authority: CN
Inventors: 叶平; 李佳俊
Original assignee: Zhejiang CFMOTO Power Co Ltd
Current assignee: Zhejiang CFMOTO Power Co Ltd
Priority date: 2021-08-13
Filing date: 2021-08-13
Publication date: 2022-03-11
Anticipated expiration: 2031-08-13

Abstract

The utility model provides a charger, charge to the vehicle carried battery of a vehicle, the charger has vehicle carried charge mode and portable charge mode, the charger includes: a communication module for receiving a signal from a vehicle or a vehicle-mounted battery; the control module receives the signal received by the communication module and controls at least one parameter in the charging process; the switching circuit comprises a first resistor, a second resistor and a control switch; when the charger is in a portable charging mode, the vehicle-mounted battery outputs a first signal to the control switch, so that the first resistor and the second resistor are connected; when the charger is in the vehicle-mounted charging mode, the vehicle outputs a second signal to the control switch, so that the first resistor and the second resistor are disconnected. The vehicle-mounted charging and portable charging device can be simultaneously adapted to vehicle-mounted charging and portable charging, so that a user can use the device in different scenes, the battery can be alternately used, and the endurance is improved.

Description

Charging machine

Technical Field

The utility model relates to a charging device, in particular to a charger.

Background

Nowadays, a CAN (Controller Area Network) communication protocol is widely applied to the new energy automobile industry due to its advantages of high performance and high reliability. In the signal transmission circuit, since various transmission lines have characteristic impedances, when an impedance mismatch occurs between a signal transmitted to a terminal in the transmission line, a reflection is caused, thereby distorting a signal waveform (concave or convex). The presence of this distortion may result in incorrect data transmission, and termination resistors must be added. The termination resistor functions to eliminate impedance mismatch that occurs in the CAN bus. In practical use, 2 termination resistors of 120 ohms must be connected across the two physically furthest nodes on the CAN communication bus.

In the field of new energy vehicles, the capacity, safety, health state and endurance of a battery are important concerns. A Battery Management System (BMS System) is a System for monitoring and controlling a Battery. In the BMS system, when data transmission abnormality occurs in the CAN communication bus, the BMS system controls the battery to ensure safety, which may cause the vehicle to fail to operate normally. Therefore, it is a vital part of the BMS system that the CAN communication bus transmits signals accurately and timely.

Nowadays, a CAN communication network is included in a vehicle, and a storage battery is used as a power source of the vehicle and is connected to a node in the CAN communication network. In order to eliminate the impedance mismatching phenomenon of the CAN bus, in practical application, a terminal resistor is respectively arranged at the two farthest terminals of a CAN communication network of a vehicle. However, when the storage battery is taken down for charging, the CAN communication network formed by connecting the storage battery and the charger has no terminal resistor, and thus the storage battery cannot be charged due to impedance mismatch.

Therefore, a technical solution is needed to solve the technical problem that the charger cannot adapt to vehicle charging and portable charging at the same time.

Disclosure of Invention

The utility model aims to provide a charger, which solves the problem that the existing charger cannot be adapted to vehicle-mounted charging and portable charging at the same time.

Based on the technical problem, the present invention provides a charger for charging a storage battery of a vehicle, the vehicle includes a CAN communication network, the storage battery CAN be connected to the CAN communication network, the storage battery of the vehicle is a vehicle-mounted battery or a portable battery, the charger includes:

the communication module comprises a CAN communication interface, the CAN communication interface CAN be accessed to a CAN communication network of a vehicle to form a communication network topology, or the CAN communication interface CAN be connected with a portable battery to form the communication network topology; it is characterized in that the preparation method is characterized in that,

the charger comprises a vehicle-mounted charging mode and a portable charging mode, the vehicle-mounted charging mode comprises that the charger charges a vehicle-mounted battery, and the portable charging mode comprises that the charger charges a portable battery; the machine that charges still includes:

the communication network topology switching circuit comprises a first resistor, a second resistor and a control switch for controlling whether the first resistor and the second resistor are connected to a communication network topology or not;

when the CAN communication interface is accessed to a CAN communication network of a vehicle to form a communication network topology, the control switch controls the first resistor and the second resistor to be disconnected in the communication network topology; when the CAN communication interface is connected with the portable battery to form a communication network topology, the control switch controls the first resistor and the second resistor to be connected into the communication network topology.

The control switch is provided with an addressing signal input port; when the CAN communication interface is accessed to a CAN communication network of a vehicle to form a communication network topology, the addressing signal input port is grounded, and the control switch controls the first resistor and the second resistor to be disconnected in the communication network topology; when the CAN communication interface is connected with the portable battery to form a communication network topology, the addressing signal input port is suspended, and the control switch controls the first resistor and the second resistor to be connected into the communication network topology.

The control switch comprises a first MOS tube and a second MOS tube.

The source electrode of the first MOS tube is connected with the addressing signal input port, when the addressing signal input port is grounded, the first MOS tube is conducted, and when the addressing signal input port is suspended, the first MOS tube is cut off;

the drain electrode of the first MOS tube is connected with the grid electrode of the second MOS tube, the first resistor is connected with the drain electrode of the second MOS tube, and the second resistor is connected with the drain electrode of the second MOS tube;

when the first MOS tube is conducted, the second MOS tube is cut off, and the first resistor and the second resistor are disconnected in the communication network topology; when the first MOS tube is cut off, the second MOS tube is conducted, and the first resistor and the second resistor are connected into a communication network topology.

And under the condition that the first resistor and the second resistor are connected in parallel, the common end of the first resistor and the second resistor is connected with the drain electrode of the second MOS tube.

The control switch further comprises a protection resistor, the drain electrode of the first MOS tube and the grid electrode of the second MOS tube are connected to one end of the protection resistor, and the other end of the protection resistor is connected with a power supply.

The charger also comprises a first voltage output port electrically connected with the battery management module under the condition that the storage battery comprises the battery management module, and the first voltage output port is used for awakening the battery management module; the first voltage output port is connected with the grid electrode of the first MOS tube.

The storage battery further comprises a battery management module, wherein the battery management module sends a charging application to the communication module, and the charging application comprises a battery charging characteristic curve, a request voltage and/or a request current.

The charger further comprises a control module, wherein the control module is used for receiving the charging application received by the communication module and controlling at least one parameter in the charging process, and the parameter comprises one or more of output voltage and output current of the charger.

The communication module further comprises a CAN transceiver, and the CAN transceiver is an interface between the CAN controller and a CAN bus.

The technical scheme provided by the utility model has the following advantages: the vehicle-mounted charging device can be simultaneously adapted to vehicle-mounted charging and portable charging, so that a user can use the vehicle-mounted charging device in different scenes, the battery can be alternately used, and the endurance is improved.

Drawings

FIG. 1 is a schematic diagram illustrating a blind charging method in the prior art;

FIG. 2 is a schematic diagram of a prior art vehicle charging system;

FIG. 3 is a diagram illustrating a portable charging method in the prior art;

FIG. 4 is a schematic diagram of an internal structure of a charger according to the present application;

fig. 5 is a schematic view of a charging process according to the present application.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While alternative implementations of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

In recent years, new energy vehicles have been rapidly developed, and various manufacturers have introduced new energy vehicles of various models to meet market demands, and at present, the following charging methods are mainly used for various types of new energy vehicles:

as shown in fig. 1, the battery is charged by a blind charging method, that is, the charger 100 directly outputs the output voltage to the battery for charging, and there is no cut-off control for controlling the charging voltage, the charging current, and other abnormal states, so the blind charging method is dangerous. Because the blind charging mode cannot control the charging voltage and current and cannot adapt to the charging characteristics of the battery, the blind charging mode can cause the service life of the battery to be rapidly reduced.

As shown in fig. 2, the battery is charged in an on-board charging manner, that is, the battery is mounted inside the vehicle and is charged through a charging interface designed for the vehicle. During charging, charging is firstly confirmed, output is started after confirmation is completed, and functions of controlling charging voltage, charging current, other abnormal state cut-off control and the like are provided in the charging process.

However, with the development of technology, in-vehicle charging cannot fully exploit the advantage of the alternate use of small lithium batteries, and therefore, there are other charging methods.

As shown in fig. 3, the battery is charged in a portable charging manner, i.e., the lithium battery is detached to charge the battery. Different from the first blind charging mode, the lithium battery is provided with a battery management module. When the portable charging mode is adopted for charging, firstly, charging confirmation is carried out, output is started after the confirmation is completed, and control functions of controlling charging voltage, charging current, cutting off other abnormal states and the like are provided in the charging process, so that the charging safety is guaranteed, and the service life of the battery is prevented from being rapidly reduced.

In practical applications, people usually want to have multiple charging modes selectable in order to adapt to different scenes. Therefore, there are also vehicles on the market that can perform both in-vehicle charging and portable charging. However, this charging method has problems to be solved. The portable charging and the vehicle-mounted charging have the problem that the matching is difficult at the same time.

Aiming at the problem that the portable charging and the vehicle-mounted charging are difficult to adapt simultaneously, the utility model provides a charger 100 for charging a vehicle-mounted battery of a vehicle, wherein the charger 100 comprises a vehicle-mounted charging mode and a portable charging mode.

The vehicle is used as a first charging object of the charger 100 provided by the utility model, and the first charging object is provided with an energy storage unit which can be a storage battery. The battery serves as a power source of the vehicle, and for convenience of reference, the battery in a state of being connected to the vehicle is referred to as an on-vehicle battery in the present application. A battery disconnected from a vehicle and taken out of the vehicle is referred to as a portable battery. The battery includes a battery management module for managing charging and/or discharging of the battery. The vehicle-mounted battery is used as a first charging object of the charger 100 provided in this embodiment of the application, and the first charging object is provided with a communication Network, specifically, in an embodiment of the present invention, the communication Network is, for example, a CAN (Controller Area Network) communication Network. The battery management module is connected with the communication network as a communication node. The communication network is designed with an external communication access port for expanding the access of the communication nodes. First charging object still is provided with the module of charging, and the module of charging includes: and the external power supply equipment is electrically connected with the energy storage unit through the first charging interface to charge the energy storage unit. As an optional implementation manner, the external communication access port of the communication network and the first charging interface of the charging module may be centrally arranged, so that the charger 100 provided by the present invention can be accessed to the communication network as a communication node when providing the charging service.

The portable battery is used as a second charging object of the charger 100 provided by the present invention, and the second charging object is provided with a battery management module and a second charging interface. The battery management module is used for managing charging and/or discharging of a second charging object, and the second charging interface is used for connecting the external power supply equipment with the second charging object. The battery management module may be accessed as a communication node in a communication network connection.

As shown in fig. 4, the present application provides a charger 100 for charging a battery of a vehicle, the vehicle includes a CAN communication network, the battery CAN access the CAN communication network, the charger 100 includes: a communication module 11 and a control module 12. The communication module 11 includes a CAN communication interface 111, and the CAN communication interface 111 CAN be connected to a CAN communication network of the vehicle to form a communication network topology, or the CAN communication interface 111 CAN be connected to the portable battery to form a communication network topology. The control module 12 is configured to receive the signal received by the communication module 11 and control at least one parameter in the charging process. The charger 100 further includes: the switching circuit 13, the switching circuit 13 includes a first resistor 131, a second resistor 132, and a control switch 133 for controlling whether the first resistor 131 and the second resistor 132 are connected to the communication network topology.

The charger 100 provided by the utility model comprises a first charging mode and a second charging mode. The first charging mode is specifically a portable charging mode for charging the portable battery. The second charging mode is specifically an on-vehicle charging mode for charging an on-vehicle battery. The user can choose to use a more convenient charging method in different scenes. Moreover, after the charger 100 is adapted to portable charging, a user can select to use the storage batteries alternately, so that the endurance of the vehicle is improved. Moreover, the vehicle-mounted chargers need to be in one-to-one correspondence, namely one vehicle needs to have one vehicle-mounted charger. However, the charger 100 provided by the present invention can realize one-to-many charging, that is, the charger 100 of the present invention can be used for a plurality of wheel flows, so that the cost of the vehicle can be reduced to a certain extent, and the waste of resources can be reduced.

When the charger charges the vehicle-mounted battery, the CAN communication interface 111 is connected to a CAN communication network of the vehicle to form a communication network topology, and the control switch 133 controls the first resistor 131 and the second resistor 132 to be disconnected in the communication network topology. When the charger charges the portable battery, the CAN communication interface 111 is connected with the portable battery to form a communication network topology, and the control switch 133 controls the first resistor 131 and the second resistor 132 to access the communication network topology.

As shown in fig. 4, in one embodiment of the utility model, the communication network is, for example, a CAN communication network. The communication module 11 includes a CAN transceiver 112 and a CAN bus including a CANH bus 111a and a CANL bus 111 b. In the present invention, the CAN communication interface 111 is an external expansion interface of the CAN bus. During charging, the CAN communication interface 111 is coupled to the first charging object or the second charging object, so that the charger 100 CAN communicate with the first charging object and/or the second charging object. As an alternative implementation manner, when the charger 100 provides a service for the first charging object, the CAN communication interface 111 of the charger 100 is connected to an external communication access port of the first charging object. At this time, the charger 100 is connected as one communication node to the communication network of the first charging target, and forms a first communication network topology. As an optional implementation manner, when the charger 100 provides a service for a second charging object, the CAN communication interface 111 of the charger 100 is connected to a battery management module of the second charging object, and the battery management module is connected to a CAN bus of the charger 100 as a communication node to form a second communication network topology.

In order to avoid data being reflected back during transmission in the communication network, there are, and only two terminating resistors connected in parallel to the CAN bus. In the first communication network topology, two terminal resistors are preset in the first charging object and connected in parallel on the first communication network topology. When the charger 100 provides services, the first resistor 131 and the second resistor 132 in the charger 100 are disconnected from the first communication network topology without the charger 100 additionally providing a terminal resistor. In the second communication network topology, the charger 100 provides service to the second charging object. At this time, the first resistor 131 and the second resistor 132 are connected to the second communication network topology, and as an optional implementation manner, when the first resistor 131 and the second resistor 132 are connected to the second communication network topology, they are connected in parallel to a CAN bus inside the charger 100. According to the utility model, the switching circuit 13 is designed in the charger 100, so that the purpose that the charger 100 is simultaneously adaptive to vehicle-mounted charging and portable charging is realized. Moreover, due to the existence of the switching circuit 13, when the charger 100 performs vehicle charging, the terminal resistor inside the charger 100 is isolated from the communication network of the vehicle, and the connection state of the terminal resistor on the communication network inside the vehicle does not need to be considered.

In order to control the connection or disconnection state of the first resistor 131 and the second resistor 132, the present invention provides a control switch 133, and when the control switch 133 inputs a first signal, the first resistor 131 and the second resistor 132 are connected to the second communication network topology. When the control switch 133 inputs the second signal, the first resistor 131 and the second resistor 132 are disconnected from the first communication network topology.

As an alternative implementation, the control switch 133 is provided with an address signal input port 1331. When the CAN communication interface 111 is connected to a CAN communication network of the vehicle to form a communication network topology, the addressing signal input port 1331 is grounded, and the control switch 133 controls the first resistor 131 and the second resistor 132 to be disconnected in the communication network topology; when the CAN communication interface 111 is connected with the portable battery to form a communication network topology, the addressing signal input port 1331 is suspended, and the control switch 133 controls the first resistor 131 and the second resistor 132 to access the communication network topology. Through the implementation manner, the charging objects provided by the charger 100 can be accurately distinguished according to whether the charger 100 is grounded, that is, when the charger 100 is grounded, the charger 100 serves a first charging object to start a vehicle-mounted charging mode, and when the charger 100 is suspended, the charger 100 serves a second charging object to start a portable charging mode.

As an alternative implementation, the control switch 133 includes: a first MOS transistor 1332 and a second MOS transistor 1333. The input signal of the address signal input port 1331 controls the on and off states of the first MOS transistor 1332. The on and off states of the second MOS transistor 1333 are affected by the first MOS transistor 1332, the second MOS transistor 1333 is turned off when the first MOS transistor 1332 is turned on, and the second MOS transistor 1333 is turned on when the first MOS transistor 1332 is turned off, that is, the states of the first MOS transistor 1332 and the second MOS transistor 1333 are different.

The first resistor 131 and the second resistor 132 are respectively connected to the second MOS transistor 1333, and when the second MOS transistor 1333 is turned on, the first resistor 131 and the second resistor 132 are connected in parallel to the communication network topology. When the second MOS transistor 1333 is turned off, the first resistor 131 and the second resistor 132 are disconnected from the communication network topology.

As shown in fig. 4, as an implementation manner of the optional switching circuit 13, a gate of the first MOS transistor 1332 is connected to a voltage output port, and a source of the first MOS transistor 1332 is connected to the address signal input port 1331. The voltage output port to which the gate of the first MOS transistor 1332 is connected has a limitation condition, where the limitation condition is: at least a first voltage exists, and when the addressing signal input port 1331 is connected to the first voltage, the gate-source voltage of the first MOS transistor 1332 is greater than the starting voltage of the first MOS transistor 1332. The gate of the second MOS transistor 1333 is connected to the drain of the first MOS transistor 1332. There is a protection resistor 1334, the drain of the first MOS transistor 1332 and the gate of the second MOS transistor 1333 are commonly connected to one end of the protection resistor 1334, and the other end of the protection resistor 1334 is connected to a power supply. The source of the second MOS 1333 is connected to the CANL bus 111b, one end of each of the first resistor 131 and the second resistor 132 is connected to the drain of the second MOS 1333, and the other end of each of the first resistor 131 and the second resistor 132 is connected to the CANH bus 111 a.

As an alternative implementation, the first voltage is a ground voltage. When the address signal input port 1331 is connected to a ground signal, a second signal is input to the control switch 133, and the second signal is a voltage signal when the address signal input port 1331 is connected to a ground. At this time, the gate-source voltage of the first MOS transistor 1332 is greater than the start voltage, the first MOS transistor 1332 is turned on, and the gate voltage of the second MOS transistor 1333 changes, so that the second MOS transistor 1333 is turned off. When the address signal input port 1331 is empty, a first signal is input to the control switch 133, and the first signal is a voltage signal when the address signal input port 1331 is empty. At this time, the gate-source voltage of the first MOS transistor 1332 is less than the start voltage, the first MOS transistor 1332 is turned off, and the second MOS transistor 1333 is turned on.

As shown in fig. 4, the charger 100 provided by the present invention further includes: the power module 14 is controlled by the control module 12 during the charging process.

The power module 14 is provided with a high-voltage ac input port for connecting an external power source, and a first voltage output port 141, and the output voltage of the first voltage output port 141 may be 12V for waking up the battery management module. To avoid error, the first voltage output port 141 is different from the first voltage input port 1331.

As an implementation, the gate of the first MOS transistor 1332 may be connected to the first voltage output port 141, so that the first MOS transistor 1332 may perform the functions of the present invention. That is, after the gate of the first MOS transistor 1332 is connected to the first voltage output port 141, the gate of the first MOS transistor 1332 obtains a stable voltage, and the on and off states of the first MOS transistor 1332 can be controlled by adjusting the voltage of the source of the first MOS transistor 1332, so that the first MOS transistor 1332 can perform the functions of the present invention.

As shown in fig. 5, a usage flow of the present invention is provided. First, the charger 100 is connected to a charging object to provide a charging service to the charging object. The charging object is a first charging object or a second charging object. The connection between the charger 100 and the charging object includes: the CAN communication interface 111 of the charger 100 is connected to a charging object, and as a specific embodiment, a CAN bus in the charger 100 is used as a physical link connecting the charger 100 and the charging object.

After the physical link connection between the charger 100 and the charging object is realized, handshaking between the charger 100 and the charging object needs to be realized, and data transmission can be performed only after an agreement is reached in a protocol layer. Specifically, the communication module 11 and the vehicle-mounted battery carry out CAN communication handshake, and after the handshake is successful, the battery management module sends a signal to the communication module 11, wherein the signal is used as a charging application, and the charging application comprises a battery charging characteristic curve, a request voltage and/or a request current.

The control module 12 receives the charging application received by the communication module 11, and controls at least one parameter in the charging process according to the charging application, where the parameter includes one or more of output voltage, output current, and output power of the charger 100. As a specific embodiment, the parameter controlled in the charging process of the present invention is the output current.

When the charging application exceeds the maximum voltage and \ or current output range of the charger 100, the control module 12 controls the charger 100 to output according to the maximum voltage and \ or current of the charger 100. When the charging application is in the maximum voltage and/or current output range of the charger 100, the control module 12 controls the charger 100 to output according to the charging application.

Communication module 11 and on-vehicle battery carry out CAN communication and handshake, send the charging data to battery management module after shaking successfully, and the charging data includes: the voltage output value and the current output value of the charger 100, the electric quantity of the alternating current end of the charger 100 and the reason of charging stopping fault of the charger 100.

The reasons for the charging failure of the charger 100 include: insulation faults, output connector over-temperature faults, BMS element over-temperature faults, charging connector over-temperature faults, battery pack over-temperature faults, high voltage relay faults, and other faults. These charge interruption failure causes are transmitted to the battery management module through the communication module 11 in a format conforming to the communication standard.

When the charger 100 fails, the control module 12 controls the charger 100 to stop charging output.

When the charger 100 works normally, the control module 12 controls at least one parameter in the charging process in real time according to the charging application, and when the vehicle-mounted battery finishes charging, the control module 12 controls the charger 100 to stop charging output.

The control module 12 includes a data processing unit and a CAN controller, and as an optional implementation manner, the control module 12 may be a single chip microcomputer integrating a chip MCU and a CAN controller. The CAN controller is used for converting the message to be transmitted and received into a CAN frame meeting CAN standards, and exchanging information on a CAN bus through the CAN transceiver.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A charger for charging a battery of a vehicle, the vehicle including a CAN communication network, the battery being accessible to the CAN communication network, the battery of the vehicle being a vehicle-mounted battery or a portable battery, the charger comprising:

the communication module comprises a CAN communication interface, the CAN communication interface CAN be accessed to a CAN communication network of the vehicle to form a communication network topology, or the CAN communication interface CAN be connected with the portable battery to form the communication network topology; it is characterized in that the preparation method is characterized in that,

the charger comprises a vehicle-mounted charging mode and a portable charging mode, the vehicle-mounted charging mode comprises the charger charging the vehicle-mounted battery, and the portable charging mode comprises the charger charging the portable battery; the charger still includes:

the communication network topology switching circuit comprises a first resistor, a second resistor and a control switch for controlling whether the first resistor and the second resistor are connected to the communication network topology or not;

when the CAN communication interface is accessed to a CAN communication network of the vehicle to form the communication network topology, the control switch controls the first resistor and the second resistor to be disconnected in the communication network topology; when the CAN communication interface is connected with the portable battery to form the communication network topology, the control switch controls the first resistor and the second resistor to be connected to the communication network topology.

2. The charger according to claim 1, characterized in that: the control switch is provided with an addressing signal input port; when the CAN communication interface is connected to a CAN communication network of the vehicle to form the communication network topology, the addressing signal input port is grounded, and the control switch controls the first resistor and the second resistor to be disconnected in the communication network topology; when the CAN communication interface is connected with the portable battery to form the communication network topology, the addressing signal input port is suspended, and the control switch controls the first resistor and the second resistor to be connected to the communication network topology.

3. The charger according to claim 2, characterized in that said control switch comprises: the MOS transistor comprises a first MOS transistor and a second MOS transistor.

4. The charger according to claim 3, characterized in that:

when the first MOS tube is conducted, the second MOS tube is cut off, and the first resistor and the second resistor are disconnected in the communication network topology; when the first MOS tube is cut off, the second MOS tube is conducted, and the first resistor and the second resistor are connected into the communication network topology.

5. The charger according to claim 4, characterized in that the first resistor is connected in parallel with the second resistor, and when the first resistor is connected in parallel with the second resistor, a common terminal of the first resistor and the second resistor is connected to a drain of the second MOS transistor.

6. The charger according to claim 4, characterized in that: the control switch further comprises a protection resistor, the drain electrode of the first MOS tube and the grid electrode of the second MOS tube are connected to one end of the protection resistor, and the other end of the protection resistor is connected with a power supply.

7. The charger according to claim 4, wherein the battery further comprises a battery management module, and in the case that the battery comprises the battery management module, the charger further comprises a first voltage output port electrically connected to the battery management module, the first voltage output port being configured to wake up the battery management module; the first voltage output port is connected with the grid electrode of the first MOS tube.

8. The charger according to claim 1, characterized in that: the storage battery further comprises a battery management module, wherein the battery management module sends a charging application to the communication module, and the charging application comprises a battery charging characteristic curve, a request voltage and/or a request current.

9. The charger according to claim 8, characterized in that: the charger further comprises a control module, wherein the control module is used for receiving the charging application received by the communication module and controlling at least one parameter in the charging process, and the parameter comprises one or more of output voltage and output current of the charger.

10. The charger according to claim 9, characterized in that: the control module group includes data processing unit and with the CAN controller that data processing unit links to each other, communication module group still includes the CAN transceiver, the CAN transceiver is interface between CAN controller and the CAN bus.