Vehicle charging method, device and equipment and storage medium

Abstract

The invention relates to a vehicle charging method, device and equipment and a storage medium, and relates to the technical field of new energy electric vehicles. The method comprises the steps that a battery management system determines a charging mode in response to charging connection between an electric vehicle and a charging pile; under the condition that the charging mode is direct-current charging and the insulation detection of the battery pack of the electric vehicle is passed, the required voltage and the required current of the battery pack are determined; indication information is sent to the charging pile; the indication information is used for indicating the required voltage and the required current, so that the charging pile charges the electric vehicle according to the required voltage and the required current. Wherein the required voltage is greater than the output voltage of the battery pack. Therefore, direct-current charging of the medium-voltage platform electric vehicle can be realized.

Description

Technical Field

[0001] This application relates to the technical field of new energy electric vehicles, and particularly to a vehicle charging method, device, equipment and storage medium. Background Art

[0002] For most batteries of new energy A00-class pure electric vehicles, the output voltage range is 70-160V, and an AC charging pile is usually used for charging.

[0003] However, the AC charging pile is for slow charging and the charging time is relatively long. If a DC charging pile is used for charging, the charging voltage of the DC charging pile is generally higher than 220V, which does not match the output voltage of the vehicle battery and cannot meet DC charging. Summary of the Invention

[0004] This application provides a vehicle charging method, device, equipment and storage medium, so that pure electric vehicles on a medium-voltage platform can be charged through a DC charging pile. The technical solution of this application is as follows:

[0005] According to the first aspect involved in this application, a vehicle charging method is provided, which is applied to the battery management system of an electric vehicle. The battery management system is used to manage the battery pack of the electric vehicle. The method includes: in response to the charging connection between the charging end of the vehicle and the charging pile, determining the charging mode; when the charging mode is DC charging and the insulation detection of the battery pack of the electric vehicle passes, determining the required voltage and required current of the battery pack; the required voltage is greater than the output voltage of the battery pack; and sending an indication message to the charging pile; the indication message is used to indicate the required voltage and required current, so that the charging pile charges the electric vehicle according to the required voltage and required current.

[0006] According to the above technical means, this application can determine the charging mode of the electric vehicle after the electric vehicle is connected to the charging pile. When the charging mode is DC charging and the insulation detection is passed, the required voltage and required current of the battery pack are determined, and then the battery pack is charged based on the required voltage and required current. Therefore, it is possible to charge the battery pack under high voltage conditions by adjusting the output voltage of the charging pile to the required voltage.

[0007] In a possible implementation manner, the above "the charging mode includes DC charging and AC charging; in response to the charging connection between the charging end of the vehicle and the charging pile, determining the charging mode" method includes: determining the charging mode according to the interface resistance between the charging gun of the charging pile and the charging port of the electric vehicle; if the interface resistance is greater than a preset value, determining that the charging mode is DC charging; if the interface resistance is less than or equal to the preset value, determining that the charging mode is AC charging.

[0008] According to the above technical means, the present application can determine the charging mode based on the interface resistance between the charging gun of the charging pile and the charging port of the electric vehicle. Therefore, the charging mode of the electric vehicle can be accurately obtained.

[0009] In a possible implementation manner, the above method of "the charging mode is DC charging" further includes: receiving a detection instruction from the charging pile, where the detection instruction is used to indicate whether the battery pack passes the insulation detection; in the case where the battery pack passes the insulation detection, controlling the DC charging relay of the electric vehicle to close; the DC charging relay is used to control the charging and power-off of the battery pack.

[0010] According to the above technical means, the present application can operate the DC relay of the electric vehicle after receiving the instruction that the insulation detection of the charging pile passes. Therefore, damages such as internal transverse cracks, break-off and rupture of the battery pack of the electric vehicle can be avoided, effectively avoiding the failure problems of power outage or power-off during operation, and ensuring the safe operation of the battery pack of the electric vehicle.

[0011] In a possible implementation manner, the above method of "sending indication information to the charging pile; the indication information is used to indicate the required voltage and the required current so that the charging pile charges the electric vehicle according to the required voltage and the required current" further includes: determining the charging voltage of the battery pack according to the required voltage; determining the charging current of the battery pack according to the pre-stored state of charge-charging current relationship table; sending the charging voltage and the charging current to the charging pile so that the charging pile charges the battery pack according to the charging voltage and the charging current.

[0012] According to the above technical means, the present application can determine the charging current of the battery pack according to the pre-stored state of charge-charging current relationship table; and charge the battery pack based on the charging voltage and the charging current.

[0013] In a possible implementation manner, the above method further includes: the charging interface configured by the electric vehicle is different from the charging interface of the charging pile; wherein, the charging connection between the electric vehicle and the charging pile means that the electric vehicle is connected to the charging pile through a conversion connector; one end of the conversion connector has an interface that is consistent with the output interface of the charging pile, and the other end of the conversion connector has an interface that is consistent with the charging interface of the electric vehicle.

[0014] According to the above technical means, the present application can connect the DC charging pile and the charging interface of the electric vehicle through a conversion connector to realize the charging of the seven-hole charging interface of the electric vehicle by the DC charging pile. And AC charging and DC charging can be realized through the seven-hole charging interface. Therefore, the electric vehicle can realize AC charging and DC charging through one charging interface, saving costs.

[0015] According to a second aspect provided by the present application, there is provided a vehicle charging device, including a determination unit configured to determine a charging mode in response to the charging connection between the charging end of the vehicle and the charging pile; the determination unit is further configured to determine the required voltage and required current of the battery pack when the charging mode is DC charging and the insulation detection of the battery pack of the electric vehicle passes; the required voltage is greater than the output voltage of the battery pack; a sending unit configured to send an indication message to the charging pile; the indication message is used to indicate the required voltage and required current, so that the charging pile charges the electric vehicle according to the required voltage and required current.

[0016] In a possible implementation manner, the above determination unit is specifically configured to determine the charging mode according to the interface resistance between the charging gun of the charging pile and the charging port of the electric vehicle; if the interface resistance is greater than a preset value, it is determined that the charging mode is DC charging; if the interface resistance is less than or equal to the preset value, it is determined that the charging mode is AC charging.

[0017] In a possible implementation manner, the above control unit is specifically configured to, when the charging mode is DC charging, receive a detection instruction from the charging pile, and the detection instruction is used to indicate whether the battery pack passes the insulation detection; when the battery pack passes the insulation detection, control the DC charging relay of the electric vehicle to close; the DC charging relay is used to control the charging and power-off of the battery pack.

[0018] In a possible implementation manner, the above determination unit is specifically further configured to determine the charging voltage of the battery pack according to the required voltage; determine the charging current of the battery pack according to a pre-stored state of charge-charging current relationship table; send the charging voltage and charging current to the charging pile, so that the charging pile charges the battery pack according to the charging voltage and charging current.

[0019] In a possible implementation manner, the above determination unit specifically further includes that the charging interface configured by the electric vehicle is different from the charging interface of the charging pile; wherein, the charging connection between the electric vehicle and the charging pile means that the electric vehicle is connected to the charging pile through a conversion connector; one end interface of the conversion connector is consistent with the output end interface of the charging pile, and the other end interface of the conversion connector is consistent with the charging end interface of the electric vehicle.

[0020] According to a third aspect provided by the present application, there is provided an electronic device, including: a processor; a memory for storing processor-executable instructions; wherein, the processor is configured to execute the instructions to implement the method according to the first aspect and any one of its possible implementation manners.

[0021] According to a fourth aspect provided by the present application, there is provided a vehicle including the electronic device provided by the third aspect.

[0022] According to a fifth aspect provided by the present application, there is provided a computer-readable storage medium. When the instructions in the computer-readable storage medium are executed by a processor of an electronic device, the electronic device can execute the method according to the first aspect and any possible implementation manner thereof above.

[0023] According to a sixth aspect provided by the present application, there is provided a computer program product. The computer program product includes computer instructions. When the computer instructions run on an electronic device, the electronic device executes the method according to the first aspect and any possible implementation manner thereof above.

[0024] Thus, the above technical features of the present application have the following beneficial effects:

[0025] (1) After the electric vehicle is connected to the charging pile, the charging mode of the electric vehicle can be determined. When the charging mode is DC charging and the insulation detection is passed, the required voltage and required current of the battery pack are determined, and then the battery pack is charged based on the required voltage and required current. Therefore, the battery pack can be charged under high voltage conditions by adjusting the output voltage of the charging pile to the required voltage.

[0026] (2) The charging mode can be determined by the interface resistance between the charging gun of the charging pile and the charging port of the electric vehicle. Therefore, the charging mode of the electric vehicle can be accurately obtained.

[0027] (3) After receiving the instruction that the insulation detection of the charging pile is passed, the DC relay of the electric vehicle can be operated. Therefore, damages such as internal transverse cracks, break-off and rupture of the battery pack of the electric vehicle can be avoided, and the failure problems of power outage or power cut during operation can be effectively avoided, ensuring the safe operation of the battery pack of the electric vehicle.

[0028] (4) The charging current of the battery pack can be determined according to the pre-stored state of charge-charging current relationship table of the battery; and the battery pack is charged based on the charging voltage and the charging current.

[0029] (5) The DC charging pile and the charging interface of the electric vehicle can be connected through a conversion connector to realize the charging of the seven-hole charging interface of the electric vehicle by the DC charging pile. And DC charging and AC charging can be realized through the seven-hole charging interface. Therefore, the electric vehicle can realize AC charging and DC charging through one charging interface, saving costs.

[0030] It should be noted that the technical effects brought by any implementation manner in the second aspect to the sixth aspect can be referred to the technical effects brought by the corresponding implementation manner in the first aspect, which will not be elaborated here.

[0031] It should be understood that the above general description and the following detailed description are merely exemplary and explanatory, and do not limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings herein are incorporated into and constitute a part of this specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application, and do not constitute an improper limitation to the present application.

[0033] Figure 1 is a schematic framework diagram of a vehicle charging system shown according to an exemplary embodiment;

[0034] Figure 2 is a schematic structural diagram of a conversion connector shown according to an exemplary embodiment;

[0035] Figure 3 is a flowchart of a vehicle charging method shown according to an exemplary embodiment;

[0036] Figure 4 is a block diagram of a vehicle charging device shown according to an exemplary embodiment;

[0037] Figure 5 is a block diagram of an electronic device shown according to an exemplary embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0038] In order to enable those of ordinary skill in the art to better understand the technical solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification. The present application can also be implemented or applied through other different specific embodiments, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the present application.

[0039] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above accompanying drawings are used to distinguish similar objects, and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order different from those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0040] With the rapid development of new energy electric vehicle technology, DC charging can be achieved through the following solutions. Specifically, the following method is adopted:

[0041] An AC / DC gun head adapter and a DC / AC charging adapter for new energy vehicles belong to the field of new energy vehicle charging conversion. First, an AC / DC gun head adapter including a DC voltage transmission line DC+, a DC voltage transmission line DC-, a communication bus S+, and a communication bus S- is designed. When using a DC charging pile to charge a new energy vehicle, the AC / DC gun head adapter is connected between the charging gun head of the DC charging pile and the AC charging socket on the body of the new energy vehicle, and the new energy vehicle can be quickly charged with DC. On the same vehicle, only one AC charging socket can be used to achieve both DC charging and AC charging, reducing the fast and slow charging costs of new energy vehicles compared with the two charging sockets in the prior art.

[0042] Currently, the existing solutions do not solve the problem of DC charging for medium-voltage platform vehicles. To solve the above problems, the present application provides a vehicle charging method. The method includes: the battery management system determines the charging mode in response to the charging connection between the electric vehicle and the charging pile; when the charging mode is DC charging and the insulation detection of the battery pack of the electric vehicle passes, the battery management system determines the required voltage and required current of the battery pack; and sends an indication message to the charging pile; the indication message is used to indicate the required voltage and required current, so that the charging pile charges the electric vehicle according to the required voltage and required current.

[0043] For ease of understanding, the following specifically introduces a vehicle charging method provided by the present application in conjunction with the accompanying drawings.

[0044] Figure 1 is a schematic framework diagram of a vehicle charging system shown according to an exemplary embodiment, as Figure 1 shown, the vehicle 100 includes a battery pack 101, a charger 102, a battery management system 103, and a vehicle controller 104.

[0045] Among them, the battery pack 101 is a power source composed of multiple single cells, which is used to provide power for the electric vehicle. The charger 102 is used to dynamically adjust the charging current and voltage parameters based on the data provided by the battery management system 103. The battery management system 103 is used to monitor relevant parameters such as the temperature, voltage, and current of the battery pack 101 in real time. The vehicle controller 104 is used to manage, coordinate, and monitor each link of the electric vehicle power chain to improve the overall vehicle energy utilization efficiency and ensure safety and reliability.

[0046] Specifically, the vehicle controller, battery management system, and charger communicate with each other by transmitting Controller Area Network (CAN) signals. The vehicle controller stores signals such as charging permission. The battery management system stores signals such as charging mode, charging status, charging current request, voltage request, battery level, current, voltage, boost request, and buck request. The charger stores signals such as DC charging relay status, transformer required voltage, and required current. The vehicle controller, battery management system, and charger determine the next execution status based on the received signals.

[0047] Figure 2 FIG. 4 is a schematic structural diagram of a conversion connector shown according to an exemplary embodiment, as Figure 2 shown, the conversion connector is used to connect a charging pile and the charging interface of an electric vehicle.

[0048] Among them, one end of the conversion connector has nine holes, including: CC1, CC2, S+, DC+, A+, PE, A-, DC-, S-. One end of the conversion connector has seven holes, including: PE, CP, N, L1, CC, L2, L3. The connection method is as follows: CC1 is connected to PE; CC2 is connected to CC; S+ is connected to L2; DC+ is connected to L1; A+ and A- are connected to CP; DC- is connected to N; S- is connected to L3.

[0049] Specifically, CC1, CC2, and CC are used for charging connection confirmation between the charging pile and the electric vehicle charging interface; S+ and S- are communication lines connecting the charger and the electric vehicle; DC+ is used to connect the positive pole of the DC power supply of the charging pile to the positive pole of the battery; DC- is used to connect the negative pole of the DC power supply of the charging pile to the negative pole of the battery; A+ and A- are used to connect the charger to provide a low-voltage auxiliary power supply for the electric vehicle; PE is for protective grounding and is used to connect the ground wire of the power supply equipment to the vehicle platform; CP is for charging control guidance and is used to determine the maximum charging current supported by the current power supply equipment; N is used to connect the neutral wire of the AC power supply; L1 is used to connect the live wire of the AC power supply. L2 and L3 are spare contacts.

[0050] In a possible implementation, the pins L2 and L3 of the conversion connector are lengthened, and the pins L2 and L3 of the vehicle charging interface are shortened. It can ensure that when the vehicle is charging with DC, the pins L2 and L3 are connected through the conversion connector. When charging with AC, the conversion connector is not required, and the pins L2 and L3 are not in a connected state.

[0051] As Figure 3 shown, the flowchart of a vehicle charging method provided by an embodiment of the present application is applied to the battery management system of an electric vehicle and includes the following S301-S303.

[0052] S301. In response to the charging connection between the charging terminal of the vehicle and the charging pile, the battery management system determines the charging mode of the electric vehicle based on the interface resistance.

[0053] Among them, the charging mode includes DC charging and AC charging. DC charging is also known as fast charging. During DC charging, the charging power of the vehicle can range from 20kW, 40kW, 60kW to 200kW, 250kW, and 350kW, etc. AC charging is also known as slow charging, and the charging power is relatively small, generally 7kW.

[0054] In a possible implementation, the charging pile is a nine-hole DC charging pile, and the electric vehicle charging interface is a seven-hole charging interface. The electric vehicle connects to the charging gun of the charging pile through a conversion connector. After the electric vehicle is connected to the charging pile, the pin CP connected to A+ outputs a voltage through the internal hardware circuit to activate the charger. The charger outputs a voltage of 12V to activate the vehicle controller, and the vehicle controller outputs a voltage to activate controllers such as the battery management system.

[0055] After the battery management system responds to the connection between the charging pile and the electric vehicle charging interface, it determines the charging mode based on the interface resistance between the CC and PE of the electric vehicle charging interface; if the interface resistance is greater than the preset value, it determines that the charging mode is DC charging; if the interface resistance is less than or equal to the preset value, it determines that the charging mode is AC charging. Among them, the preset value is generally 3000 ohms.

[0056] Under normal circumstances, there are the following five situations for the interface resistance:

[0057] Situation 1: The resistance value of the interface resistance is 1.5 ± 3% kΩ, and the maximum allowable charging current is 10A, which is AC charging.

[0058] Situation 2: The resistance value of the interface resistance is 680 ± 3% Ω, and the maximum allowable charging current is 16A, which is AC charging.

[0059] Situation 3: The resistance value of the interface resistance is 220 ± 3% Ω, and the maximum allowable charging current is 32A, which is AC charging.

[0060] Situation 4: The resistance value of the interface resistance is 100 ± 3% Ω, and the maximum allowable charging current is 64A, which is AC charging.

[0061] Situation 5: The resistance value of the interface resistance is 5000 ± 3% Ω, and the allowable charging current is above 64A, which is DC charging.

[0062] S302. When the charging mode is DC charging and the insulation detection of the battery pack of the electric vehicle passes, the battery management system determines the required voltage and current of the battery pack.

[0063] Among them, the required voltage is greater than the output voltage of the battery pack. The product of the required voltage and the required current should be less than the maximum charging power of the battery pack.

[0064] In a possible implementation, when the charging mode of the electric vehicle is DC charging, the battery management system sends the DC charging mode to the vehicle controller. At the same time, the battery management system establishes communication with the charging pile through a handshake message and sends an insulation detection instruction to the charging pile. After receiving the insulation detection instruction, the charging pile calculates the insulation resistance values of the positive and negative poles of the electric vehicle's battery pack with respect to PE through an insulation detection device, and determines whether the insulation detection passes based on the calculated insulation resistance values.

[0065] Among them, the insulation resistance value can be the smaller value of the insulation resistance value corresponding to the positive pole and the insulation resistance value corresponding to the negative pole.

[0066] In one example, the insulation detection can include the following three cases:

[0067] Case 1: Safe: R > 500Ω / V;

[0068] Case 2: Warning, but can charge normally: 100Ω / V < R ≤ 500Ω / V;

[0069] Case 3: Fault, stop charging: R ≤ 100Ω / V.

[0070] Among them, Case 1 and Case 2 are the cases where the insulation detection passes. R > 500Ω / V means that at a voltage of 1V, the insulation resistance needs to be greater than 500 ohms.

[0071] Based on the above Case 1, if the voltage is 220V, when the insulation resistance value is greater than 220 * 500Ω, it means that the insulation detection of the charging pile for the electric vehicle's battery pack passes.

[0072] Based on the above Case 2, if the voltage is 220V, when the insulation resistance value is greater than 220 * 100 and less than or equal to 220 * 500Ω, it means that the insulation detection of the charging pile for the electric vehicle's battery pack passes.

[0073] Based on the above Case 3, if the voltage is 220V, when the insulation resistance value is less than or equal to 220 * 100Ω, it means that the insulation detection of the charging pile for the electric vehicle's battery pack does not pass and charging cannot be performed.

[0074] In the case where the insulation detection passes, the charging pile sends an insulation detection pass message to the battery management system. After receiving the insulation detection pass message, the battery management system requests the charger to close the DC charging relay and sends the closed state of the DC charging relay to the vehicle controller. After receiving the closed state of the DC charging relay, the vehicle controller detects whether the DC charging relay is in the closed state.

[0075] When the vehicle controller determines that the DC charging relay is closed, it sends a charging permission instruction to the battery management system. After receiving the charging permission instruction, the battery management system sends a request for boosting voltage instruction to the charger.

[0076] After receiving the request for boosting voltage instruction, the charger sets the required voltage of the electric vehicle based on a preset value and sends the required voltage to the battery management system. After receiving the required voltage, the battery management system sends the required voltage to the charging pile. Among them, the preset value is within a certain range, generally greater than 200V and less than or equal to 300V.

[0077] In one example, after receiving the request for boosting voltage instruction, the charger sets the required voltage of the electric vehicle based on a preset value. For example, the preset value can be 300V, and sends the required voltage to the battery management system.

[0078] In another possible implementation, the battery management system determines the required current of the battery pack according to a pre-stored state of charge (SOC)-charging current relationship table and sends the required current to the charging pile. Then, the charging pile charges the battery pack based on the required voltage and the required current. Among them, the SOC-charging current relationship table is shown in Table 1.

[0079] Table 1

[0080] SOC 100％ 70％ 50％ 10％ Charging current 10A 50A 65A 70A

[0081] S303. The battery management system sends indication information to the charging pile; so that the charging pile charges the electric vehicle according to the required voltage and the required current.

[0082] Among them, the indication information is used to indicate the charging voltage and the charging current when the electric vehicle battery pack is charged.

[0083] In one possible implementation, the battery management system sends the required voltage and the required current to the charging pile. After receiving the required voltage and the required current sent by the battery management system, the charging pile adjusts the charging voltage of the charging pile according to the required voltage and adjusts the charging current of the charging pile according to the required current. Then, the battery pack is charged based on the charging current and the charging voltage.

[0084] Through the above technical solutions, the present application can determine the charging mode of the electric vehicle after the electric vehicle is connected to the charging pile. When the charging mode is DC charging and after passing the insulation detection, the required voltage and the required current of the battery pack are determined, and then the battery pack is charged based on the required voltage and the required current. Therefore, it is possible to realize the charging of the electric vehicle with a medium-voltage platform by a DC charging pile.

[0085] The above mainly introduced the solution provided by the embodiments of the present application from the perspective of methods. To implement the above functions, a vehicle charging device or an electronic device includes corresponding hardware structures and / or software modules for performing various functions. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of each example described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed in the way of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present application.

[0086] The embodiments of the present application can, according to the above method, exemplarily divide the functional modules of a vehicle charging device or an electronic device. For example, a vehicle charging device or an electronic device may include respective functional modules corresponding to each functional division, or two or more functions may be integrated into one processing module. The above integrated module can be implemented in the form of hardware or in the form of a software functional module. It should be noted that the division of modules in the embodiments of the present application is illustrative, merely a logical functional division, and there may be other division methods in actual implementation.

[0087] Figure 4 is a block diagram of a vehicle charging device shown according to an exemplary embodiment. Referring to Figure 4 , the vehicle charging device 400 includes: a determination unit 401 and a sending unit 402.

[0088] The determination unit 401 is configured to determine a charging mode in response to the charging connection between the charging end of the vehicle and the charging pile.

[0089] The determination unit 401 is further configured to determine the required voltage and required current of the battery pack when the charging mode is DC charging and the insulation detection of the battery pack of the electric vehicle passes; the required voltage is greater than the output voltage of the battery pack.

[0090] The sending unit 402 is configured to send indication information to the charging pile; the indication information is used to indicate the required voltage and required current, so that the charging pile charges the electric vehicle according to the required voltage and required current.

[0091] In a possible implementation manner, the determination unit 401 is specifically configured to determine the charging mode according to the interface resistance between the charging gun of the charging pile and the charging port of the electric vehicle; if the interface resistance is greater than a preset value, it is determined that the charging mode is DC charging; if the interface resistance is less than or equal to the preset value, it is determined that the charging mode is AC charging.

[0092] In a possible implementation, the control unit 402 is specifically configured to receive a detection instruction from a charging pile when the charging mode is DC charging. The detection instruction is used to indicate whether the battery pack passes an insulation detection. When the battery pack passes the insulation detection, the control unit closes the DC charging relay of the electric vehicle. The DC charging relay is used to control the charging and power-off of the battery pack.

[0093] In a possible implementation, the determination unit 401 is specifically further configured to determine the charging voltage of the battery pack according to the required voltage; determine the charging current of the battery pack according to a pre-stored state of charge-charging current relationship table of the battery; and send the charging voltage and the charging current to the charging pile, so that the charging pile charges the battery pack according to the charging voltage and the charging current.

[0094] In a possible implementation, the determination unit 401 specifically further includes that the charging interface configured by the electric vehicle is different from the charging interface of the charging pile. The charging connection between the electric vehicle and the charging pile means that the electric vehicle is connected to the charging pile through a conversion connector. One end of the conversion connector has an interface that is consistent with the output interface of the charging pile, and the other end of the conversion connector has an interface that is consistent with the charging interface of the electric vehicle.

[0095] Regarding the device in the above embodiments, the specific manners in which each module performs operations have been described in detail in the embodiments related to the method, and will not be elaborated here.

[0096] Figure 5 is a block diagram of an electronic device shown according to an exemplary embodiment. As Figure 5 shown, the electronic device 500 includes, but is not limited to, a processor 501 and a memory 502.

[0097] Among them, the above-mentioned memory 502 is used to store executable instructions of the above-mentioned processor 501. It can be understood that the above-mentioned processor 501 is configured to execute instructions to implement the vehicle charging method in the above embodiments.

[0098] It should be noted that those skilled in the art can understand that Figure 5 the structure of the electronic device shown in Figure 5 does not constitute a limitation on the electronic device. The electronic device may include more or fewer components than those shown in

[0099] The processor 501 is the control center of the electronic device, connecting various parts of the entire electronic device through various interfaces and circuits. By running or executing software programs and / or modules stored in the memory 502, as well as invoking data stored in the memory 502, it executes various functions of the electronic device and processes data, thereby controlling the electronic device as a whole. The processor 501 may include one or more processing units. Optionally, the processor 501 may integrate an application processor and a modem processor. Among them, the application processor mainly processes the operating system, user interface, application programs, etc., and the modem processor mainly processes wireless communication. It can be understood that the above-mentioned modem processor may not be integrated into the processor 501 either.

[0100] The memory 502 can be used to store software programs and various data. The memory 502 mainly includes a program storage area and a data storage area. Among them, the program storage area can store the operating system, application programs required by at least one functional module (such as a determination unit, a processing unit, etc.). In addition, the memory 502 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state storage devices.

[0101] In an exemplary embodiment, there is also provided a computer-readable storage medium including instructions, such as the memory 502 including instructions. The above instructions can be executed by the processor 501 of the electronic device 500 to implement the method in the above embodiment.

[0102] In actual implementation, Figure 4 the functions of the determination unit 401 and the sending unit 402 in Figure 5 can both be implemented by the processor 501 in

[0103] invoking the computer program stored in the memory 502. The specific execution process can refer to the description of the method part in the above embodiment, and will not be elaborated here.

[0104] In an exemplary embodiment, the embodiment of the present application also provides a computer program product including one or more instructions, and the one or more instructions can be executed by the processor 501 of the electronic device to complete the method in the above embodiment.

[0105] It should be noted that when one or more instructions in the above computer-readable storage medium or in the computer program product are executed by the processor of the electronic device, the various processes of the above method embodiments are implemented, and the same technical effects as the above method can be achieved. To avoid repetition, they will not be elaborated here.

[0106] From the description of the above embodiments, those skilled in the art can clearly understand that for the convenience and brevity of description, only the above division of each functional module is used as an example. In actual applications, the above functions can be allocated to different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above.

[0107] In several embodiments provided in the present application, it should be understood that the disclosed device and method can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of modules or units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or direct coupling or communication connection to each other can be through some interfaces. The indirect coupling or communication connection of the device or unit can be in electrical, mechanical or other forms.

[0108] The units described as separate components may or may not be physically separated. The components displayed as units may be one physical unit or multiple physical units, that is, they may be located in one place, or they may be distributed to multiple different places. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0109] In addition, in each embodiment of the present application, the functional units can be integrated in one processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

[0110] When the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on such an understanding, the technical solution of the embodiments of the present application, in essence, or the part that contributes to the prior art, or all or part of this technical solution can be embodied in the form of a software product. This software product is stored in a storage medium and includes several instructions for causing a device (which can be a single-chip microcomputer, a chip, etc.) or a processor to execute all or part of the steps of the methods of the various embodiments of the present application. The aforementioned storage medium includes: various media such as USB flash drives, mobile hard disks, ROM, RAM, magnetic disks, or optical discs that can store program codes.

[0111] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A vehicle charging method, characterized in that, A battery management system applied to an electric vehicle, the battery management system being used to manage a battery pack of the electric vehicle, the method comprising: Determining a charging mode in response to a charging connection between a charging terminal of the vehicle and a charging pile; When the charging mode is DC charging and the insulation detection of the battery pack of the electric vehicle passes, determining a required voltage and a required current of the battery pack; the required voltage is greater than an output voltage of the battery pack; Sending an indication message to the charging pile; the indication message is used to indicate the required voltage and the required current, so that the charging pile charges the electric vehicle according to the required voltage and the required current.

2. The method according to claim 1, characterized in that The charging mode further includes AC charging; the determining a charging mode in response to a charging connection between a charging terminal of the vehicle and a charging pile includes: Determining the charging mode according to an interface resistance between a charging gun of the charging pile and a charging port of the electric vehicle; If the interface resistance is greater than a preset value, determining that the charging mode is DC charging; If the interface resistance is less than or equal to the preset value, determining that the charging mode is AC charging.

3. The method according to claim 1 or 2, characterized in that, When the charging mode is DC charging, the method further includes: Receiving a detection instruction from the charging pile, the detection instruction being used to indicate whether the battery pack passes an insulation detection; When the battery pack passes the insulation detection, controlling a DC charging relay of the electric vehicle to close; the DC charging relay is used to control charging and power-off of the battery pack.

4. The method according to claim 1 or 2, characterized in that, The sending an indication message to the charging pile; the indication message is used to indicate the required voltage and the required current, so that the charging pile charges the electric vehicle according to the required voltage and the required current includes: Determining a charging voltage of the battery pack according to the required voltage; Determining a charging current of the battery pack according to a pre-stored state of charge-charging current relationship table of the battery; Sending the charging voltage and the charging current to the charging pile, so that the charging pile charges the battery pack according to the charging voltage and the charging current.

5. The method according to claim 2, wherein A charging interface configured by the electric vehicle is different from a charging interface of the charging pile; Wherein, the charging connection between the electric vehicle and the charging pile means that the electric vehicle is connected to the charging pile through a conversion connector; an interface at one end of the conversion connector is consistent with an interface at an output end of the charging pile, and an interface at the other end of the conversion connector is consistent with an interface at a charging terminal of the electric vehicle.

6. A vehicle charging device, characterized in that, The device includes: A determining unit, configured to determine a charging mode in response to a charging connection between a charging terminal of the vehicle and a charging pile; The determining unit is further configured to, when the charging mode is DC charging and the insulation detection of the battery pack of the electric vehicle passes, determine a required voltage and a required current of the battery pack; the required voltage is greater than an output voltage of the battery pack; A sending unit, configured to send an indication message to the charging pile; the indication message is used to indicate the required voltage and the required current, so that the charging pile charges the electric vehicle according to the required voltage and the required current.

7. The device according to claim 6, characterized in that, The determining unit is specifically configured to: Determine the charging mode according to the interface resistance between the charging gun of the charging pile and the charging port of the electric vehicle; If the interface resistance is greater than the preset value, determine that the charging mode is DC charging; If the interface resistance is less than or equal to the preset value, determine that the charging mode is AC charging.

8. An electronic device, characterized in that, It includes a memory and a processor: The memory and the processor are coupled; The memory is used to store computer program code, and the computer program code includes computer instructions; When the processor executes the computer instructions, the electronic device executes the method described in any one of claims 1-5.

9. A vehicle, characterized in that, The vehicle includes the electronic device described in claim 8.

10. A computer-readable storage medium, on which instructions are stored, characterized in that, When the instructions in the computer-readable storage medium are executed by the processor of the electronic device, the electronic device is enabled to execute the method described in any one of claims 1-5.

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