Battery charging method and device, computer equipment, storage medium and program product

Abstract

The invention relates to a battery charging method and device, computer equipment, a storage medium and a program product. The method comprises the following steps: in response to a constant-voltage charging instruction, obtaining a configuration code of a vehicle-mounted charger and a CC signal sent by an AC charging pile; determining a corresponding cable current value according to the configuration code and the CC signal; determining a target charging strategy according to the cable current value, the current input voltage value, the output power capability of the vehicle-mounted charger, the output power capability of the AC charging pile, the BMS request voltage value and the BMS request current value; and controlling a vehicle-mounted charger to charge a power battery according to the target charging strategy. The method can be suitable for charging pile scenes with different capacities, and the charging efficiency and safety of the power battery are improved.

Description

Technical Field

[0001] The present application relates to the field of new energy vehicle technology, and in particular to a battery charging method, device, computer equipment, storage medium and program product. Background Art

[0002] With the continuous development of the new energy vehicle industry, the application scenarios of new energy vehicles on the market are becoming more and more extensive, such as snowy weather, rainy weather and hot weather. Among them, snowy weather has a greater impact on the range and charging speed of power batteries. When the temperature is low in snowy weather, the power battery will fail to charge due to the low temperature.

[0003] Currently, the mainstream methods of heating power batteries include adding heating films to the battery cell system, heating coolant, etc., but the heating film method requires additional components and has more failure points, while the heating coolant method cannot be applied to charging pile scenarios with different capacities. Summary of the invention

[0004] Based on this, it is necessary to provide a battery charging method, device, computer equipment, storage medium and program product for heating coolant that can be suitable for charging pile scenarios with different capacities in order to solve the above technical problems.

[0005] In a first aspect, the present application provides a battery charging method, comprising:

[0006] In response to the constant voltage charging instruction, obtain the configuration code of the on-board charger and the CC signal sent by the AC charging pile;

[0007] Determine the corresponding cable current value according to the configuration code and CC signal;

[0008] Determine the target charging strategy based on the cable current value, current input voltage value, output power capability of the onboard charger, output power capability of the AC charging pile, BMS requested voltage value, and BMS requested current value;

[0009] According to the target charging strategy, the on-board charger is controlled to charge the power battery.

[0010] In one embodiment, a target charging strategy is determined according to the cable current value, the current input voltage value, the output power capability of the on-board charger, the output power capability of the AC charging pile, the BMS requested voltage value, and the BMS requested current value, including:

[0011] Determine the maximum allowable power of the on-board charger based on the cable current value, the current input voltage value, the output power capacity of the on-board charger, the output power capacity of the AC charging pile, the BMS requested voltage value, and the BMS requested current value;

[0012] Determine the PTC available power based on the maximum allowable power, DC voltage value and current DC power;

[0013] If the PTC available power is greater than the PTC required power, the target charging strategy is determined to be charging according to the PTC required power;

[0014] If the PTC available power is not greater than the PTC required power, the target charging strategy is determined to be charging according to the PTC available power.

[0015] In one embodiment, the maximum allowable power of the on-board charger is determined according to the cable current value, the current input voltage value, the output power capacity of the on-board charger, the output power capacity of the AC charging pile, the BMS requested voltage value and the BMS requested current value, including:

[0016] The minimum value of the product of the cable current value and the current input voltage value, the output power capacity of the on-board charger, the output power capacity of the AC charging pile, and the product of the BMS requested voltage value and the BMS requested current value is used as the maximum allowable power of the on-board charger.

[0017] In one embodiment, determining the PTC available power according to the maximum allowable power, the DC voltage value and the current DC power includes:

[0018] The ratio of the DC voltage value to the current DC power is used as the current power consumption of the basic electrical equipment;

[0019] Determine the PTC available power based on the current power consumption, maximum allowable power and reserved power of the basic electrical equipment.

[0020] In one embodiment, before determining the target charging strategy according to the cable current value, the current input voltage value, the output power capability of the on-board charger, the output power capability of the AC charging pile, the BMS requested voltage value, and the BMS requested current value, the method further includes:

[0021] The ratio of the PTC required power to the BMS requested voltage value and the sum of the current battery allowable charging current value are used as the BMS requested current value.

[0022] In one embodiment, according to the target charging strategy, controlling the on-board charger to charge the power battery includes:

[0023] According to the target charging strategy, the on-board charger is controlled to convert the AC power output by the AC charging pile into DC power, and the PTC thermistor is charged by the DC power to realize charging of the power battery; wherein, the PTC thermistor is used to heat the coolant of the power battery.

[0024] In a second aspect, the present application also provides a battery charging device, comprising:

[0025] The command response module is used to respond to the constant voltage charging command and obtain the configuration code of the on-board charger and the CC signal sent by the AC charging pile;

[0026] A current value determination module, used to determine the corresponding cable current value according to the configuration code and the CC signal;

[0027] A strategy determination module is used to determine the target charging strategy according to the cable current value, the current input voltage value, the output power capacity of the on-board charger, the output power capacity of the AC charging pile, the BMS requested voltage value and the BMS requested current value;

[0028] The battery charging module is used to control the on-board charger to charge the power battery according to the target charging strategy.

[0029] In a third aspect, the present application further provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the following steps are implemented:

[0030] In response to the constant voltage charging instruction, obtain the configuration code of the on-board charger and the CC signal sent by the AC charging pile;

[0031] Determine the corresponding cable current value according to the configuration code and CC signal;

[0032] Determine the target charging strategy based on the cable current value, current input voltage value, output power capability of the onboard charger, output power capability of the AC charging pile, BMS requested voltage value, and BMS requested current value;

[0033] According to the target charging strategy, the on-board charger is controlled to charge the power battery.

[0034] In a fourth aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the following steps are implemented:

[0035] In response to the constant voltage charging instruction, obtain the configuration code of the on-board charger and the CC signal sent by the AC charging pile;

[0036] Determine the corresponding cable current value according to the configuration code and CC signal;

[0037] Determine the target charging strategy based on the cable current value, current input voltage value, output power capability of the onboard charger, output power capability of the AC charging pile, BMS requested voltage value, and BMS requested current value;

[0038] According to the target charging strategy, the on-board charger is controlled to charge the power battery.

[0039] In a fifth aspect, the present application further provides a computer program product, including a computer program, which implements the following steps when executed by a processor:

[0040] In response to the constant voltage charging instruction, obtain the configuration code of the on-board charger and the CC signal sent by the AC charging pile;

[0041] Determine the corresponding cable current value according to the configuration code and CC signal;

[0042] Determine the target charging strategy based on the cable current value, current input voltage value, output power capability of the onboard charger, output power capability of the AC charging pile, BMS requested voltage value, and BMS requested current value;

[0043] According to the target charging strategy, the on-board charger is controlled to charge the power battery.

[0044] The above-mentioned battery charging method, device, computer equipment, storage medium and program product, in response to the constant voltage charging instruction, obtain the configuration code of the on-board charger and the CC signal sent by the AC charging pile; determine the corresponding cable current value according to the configuration code and CC signal; determine the target charging strategy according to the cable current value, the current input voltage value, the output power capacity of the on-board charger, the output power capacity of the AC charging pile, the BMS request voltage value and the BMS request current value; according to the target charging strategy, control the on-board charger to charge the power battery. The present application determines the corresponding cable current value through the configuration code and CC signal, thereby identifying the capacity of the AC charging pile, and then combines various data to identify the own capacity of the on-board charger, the pile end capacity of the AC charging pile and the battery request requirements, etc., and adopts a digitized method to provide the entire vehicle system with a target charging strategy that matches the maximum output capacity, which can not only be applied to charging pile scenarios of different capacities, but also improve the efficiency and safety of charging the power battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the drawings required for use in the embodiments of the present application or related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0046] FIG1 is a diagram showing an application environment of a battery charging method according to an embodiment;

[0047] FIG2 is a schematic diagram of a flow chart of a battery charging method in one embodiment;

[0048] FIG3 is a schematic diagram of a process for determining a target charging strategy in one embodiment;

[0049] FIG4 is a schematic diagram of a process for determining the available power of a PTC in one embodiment;

[0050] FIG5 is a schematic flow chart of a battery charging method in another embodiment;

[0051] FIG6 is a block diagram of a battery charging device according to an embodiment;

[0052] FIG. 7 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0054] The battery charging method provided in the embodiment of the present application can be applied in the application environment shown in FIG1. ​​Among them, the on-board controller 102 communicates with the server 104 through the network. The data storage system can store the data that the server 104 needs to process. The data storage system can be integrated on the server 104, or it can be placed on the cloud or other network servers. The on-board controller 102 responds to the constant voltage charging instruction, obtains the configuration code of the on-board charger and the CC (Connector Control, charging connection confirmation) signal sent by the AC charging pile; determines the corresponding cable current value according to the configuration code and the CC signal; determines the target charging strategy according to the cable current value, the current input voltage value, the output power capacity of the on-board charger, the output power capacity of the AC charging pile, the BMS (Battery Management System, Battery Management System) request voltage value and the BMS request current value; according to the target charging strategy, the on-board charger is controlled to charge the power battery. The server 104 can be an independent physical server, or a server cluster or distributed system composed of multiple physical servers, or a cloud server that provides cloud computing services.

[0055] In an exemplary embodiment, as shown in FIG. 2 , a battery charging method is provided, which is described by taking the method applied to the vehicle-mounted controller 102 in FIG. 1 as an example, including:

[0056] S201, in response to a constant voltage charging instruction, obtaining a configuration code of the onboard charger and a CC signal sent by the AC charging pile.

[0057] The constant voltage charging instruction is a charging instruction issued by the vehicle control system in the constant voltage charging mode. The vehicle controller responds to the constant voltage charging instruction and charges the vehicle's power battery according to the steps provided in this embodiment. Specifically, first obtain the configuration code of the vehicle charger and the CC signal sent by the AC charging pile.

[0058] Among them, the specifications of the on-board chargers on different vehicles are different. The configuration code can be used to identify the current on-board charger, which can be obtained by reading the on-board charger. The CC signal is a signal sent by the AC charging pile to the vehicle to inform the AC charging pile of its support capabilities and charging methods. Different CC signals indicate different support capabilities and charging methods.

[0059] Optionally, the on-board controller first receives the charging instruction, then identifies whether it is a constant voltage charging instruction, and then executes the steps provided in this embodiment when it is determined to be in constant voltage mode. Exemplarily, after receiving the AC charging instruction, it is determined whether it is in constant current mode. If so, the upper high voltage process is executed to close the main positive and main negative relays to charge the power battery. If not, it continues to determine whether it is in constant voltage mode; further, if it is in constant voltage mode, it is determined that the charging instruction is a constant voltage charging instruction, and the steps provided in this embodiment are executed. If it is not in constant voltage mode, it means that it is neither in constant current mode nor in constant voltage mode, and charging is stopped.

[0060] S202: Determine a corresponding cable current value according to the configuration code and the CC signal.

[0061] The configuration code is a fixed number compiled by the manufacturer for different types and configurations of vehicle status. It can be used to identify the configuration status of the vehicle. The cable current value can be found based on the configuration code and CC signal.

[0062] Optionally, a configuration status table corresponding to the vehicle is determined according to the configuration code, and then a cable current value matched by the CC signal is searched in the configuration status table, where the cable current value is the charging cable capacity represented by the current CC signal.

[0063] S203, determining a target charging strategy according to the cable current value, the current input voltage value, the output power capacity of the on-board charger, the output power capacity of the AC charging pile, the BMS requested voltage value, and the BMS requested current value.

[0064] Specifically, the self-capacity is identified based on the cable current value and the current input voltage value; the gun-end capacity is identified based on the output power capacity of the on-board charger; the pile-end capacity is identified based on the output power capacity of the AC charging pile; and the battery request demand is identified based on the BMS request voltage value and the BMS request current value. Then, the corresponding values ​​of the above four capabilities are compared to determine the maximum output capacity that the vehicle system can carry, and the target charging strategy that matches the maximum output capacity is selected.

[0065] The target charging strategy is used to indicate the power at which the vehicle's power battery is charged.

[0066] Optionally, the current input voltage value can be obtained through real-time collection; the output power capacity of the AC charging pile can be determined by reading the CP (Control Pilot) signal sent by the AC charging pile; the BMS requested voltage value can be obtained by reading, and then the BMS requested current value can be calculated based on the BMS requested voltage value, the PTC required power and the current battery allowable charging current value.

[0067] S204: Control the onboard charger to charge the power battery according to the target charging strategy.

[0068] The on-board charger is controlled to convert the AC power input from the AC charging pile into DC power of the power indicated by the target charging strategy to charge the vehicle's power battery.

[0069] In the above-mentioned battery charging method, in response to the constant voltage charging instruction, the configuration code of the on-board charger and the CC signal sent by the AC charging pile are obtained; according to the configuration code and the CC signal, the corresponding cable current value is determined; according to the cable current value, the current input voltage value, the output power capacity of the on-board charger, the output power capacity of the AC charging pile, the BMS request voltage value and the BMS request current value, the target charging strategy is determined; according to the target charging strategy, the on-board charger is controlled to charge the power battery. This embodiment determines the corresponding cable current value through the configuration code and the CC signal, thereby identifying the capacity of the AC charging pile, and then combines various data to identify the own capacity of the on-board charger, the pile end capacity of the AC charging pile and the battery request requirements, etc., and adopts a digitized method to provide the entire vehicle system with a target charging strategy that matches the maximum output capacity, which can not only be applicable to charging pile scenarios of different capacities, but also can improve the efficiency and safety of charging the power battery.

[0070] As an optional implementation in this embodiment, the ratio between the PTC required power and the BMS requested voltage value and the sum of the current battery allowed charging current value are used as the BMS requested current value.

[0071] Among them, the BMS requested voltage value and the current battery allowed charging current value can both be obtained by reading.

[0072] Exemplarily, the PTC required power / BMS requested voltage value+the current battery allowed charging current value is the BMS requested current value.

[0073] In this way, the BMS requested current value can be calculated more accurately, which is conducive to the digital identification of the maximum output capacity for charging the power battery.

[0074] In an exemplary embodiment, as shown in FIG3 , the above S203 includes:

[0075] S301, determining the maximum allowable power of the on-board charger according to the cable current value, the current input voltage value, the output power capacity of the on-board charger, the output power capacity of the AC charging pile, the BMS requested voltage value and the BMS requested current value.

[0076] According to the cable current value and the current input voltage value, determine the first value characterizing its own capacity; according to the output power capacity of the on-board charger, determine the second value characterizing the gun end capacity; according to the output power capacity of the AC charging pile, determine the third value characterizing the pile end capacity; according to the BMS request voltage value and the BMS request current value, determine the fourth value characterizing the battery request demand, and then select one of the above four values ​​as the maximum allowable power of the on-board charger.

[0077] Specifically, in order to fit the actual application scenario and ensure the safety of charging the power battery, the minimum value of the above four values ​​is used as the maximum allowable power of the on-board charger.

[0078] Optionally, the minimum value of the product of the cable current value and the current input voltage value, the output power capacity of the on-board charger, the output power capacity of the AC charging pile, and the product of the BMS requested voltage value and the BMS requested current value is used as the maximum allowable power of the on-board charger.

[0079] Exemplarily, the output power capacity of the on-board charger and the product of the cable current value and the current input voltage value are first compared, and then the smaller value of the two is compared with the output power capacity of the AC charger. Further, the new smaller value is compared with the product of the BMS requested voltage value and the BMS requested current value to obtain the minimum value of the above four values, which is the maximum allowable power of the on-board charger.

[0080] S302, determining the PTC available power according to the maximum allowable power, the DC voltage value and the current DC power.

[0081] According to the DC voltage value and the current DC power, the power consumed by other electrical equipment on the high-voltage side under the current working conditions is determined, and then the power consumed by other electrical equipment is subtracted from the maximum allowable power to obtain the PTC available power.

[0082] S303, determining whether the PTC available power is greater than the PTC required power.

[0083] If yes, execute S304; if no, execute S305.

[0084] S304, determining the target charging strategy to charge according to the power required by the PTC.

[0085] S305, determining the target charging strategy to be charging according to the PTC available power.

[0086] In this embodiment, the PTC available power is determined by the maximum allowable power, and then the PTC available power is compared with the PTC required power, and the smaller value is determined as the charging power indicated by the target charging strategy, thereby improving the charging efficiency and ensuring the safety of charging.

[0087] In an exemplary embodiment, as shown in FIG4 , the above S302 includes:

[0088] S401, taking the ratio between the DC voltage value and the current DC power as the current power consumption of the basic electrical equipment.

[0089] The DC voltage value is represented as DC, and the current DC power is represented as DC current power.

[0090] The ratio between the DC voltage value and the current DC power, that is, the DC / DC current power, is the power consumed by other electrical equipment on the high-voltage side under the current working conditions, and is taken as the current power consumption of the basic electrical equipment.

[0091] S402: Determine the PTC available power according to the current power consumption, maximum allowable power and reserved power of the basic electrical equipment.

[0092] The reserved power is a preset value, which can be set to 500 W. This embodiment does not impose any specific restrictions on this. It is understandable that in order to fit the actual application scenario and ensure the safety of charging the power battery, a reserved power needs to be set to avoid charging the power battery at full power.

[0093] Specifically, the PTC available power can be obtained by subtracting the current power consumption and reserved power of the basic electrical equipment from the maximum allowable power.

[0094] In this embodiment, by introducing the current power consumption and reserved power of basic power-consuming equipment, it is suitable for actual application scenarios and can more accurately obtain the PTC available power, which is conducive to ensuring the accuracy of determining the target charging strategy.

[0095] In an exemplary embodiment, the above S204 includes:

[0096] According to the target charging strategy, the on-board charger is controlled to convert the AC power output by the AC charging pile into DC power, and the PTC thermistor is charged by the DC power to realize charging of the power battery; wherein, the PTC thermistor is used to heat the coolant of the power battery.

[0097] The on-board charger receives the AC power output by the AC charging pile and converts it into DC power to power the PTC. Specifically, the vehicle-side controller controls the on-board charger to convert the AC power into DC power indicated by the target charging strategy, and then charges the PTC thermistor. After the PTC works, it will be the coolant of the power battery. The heated coolant will be passed into the power battery through the water inlet, and then the coolant flowing out of the power battery will be input into the PTC through the outlet for further heating, thereby completing the charging of the power battery.

[0098] In this embodiment, the vehicle-mounted charger is controlled to charge the PTC thermistor, thereby charging the power battery, thereby improving the charging procedure of the vehicle's power battery.

[0099] In an exemplary embodiment, as shown in FIG5 , a battery charging method is provided, comprising:

[0100] S501, in response to a constant voltage charging instruction, obtaining a configuration code of the onboard charger and a CC signal sent by the AC charging pile.

[0101] S502: Determine a corresponding cable current value according to the configuration code and the CC signal.

[0102] S503: The ratio of the PTC required power to the BMS requested voltage value and the sum of the current battery allowed charging current value are used as the BMS requested current value.

[0103] S504: The minimum value of the product of the cable current value and the current input voltage value, the output power capacity of the on-board charger, the output power capacity of the AC charging pile, and the product of the BMS requested voltage value and the BMS requested current value is used as the maximum allowable power of the on-board charger.

[0104] S505: Taking the ratio of the DC voltage value to the current DC power as the current power consumption of the basic electrical equipment.

[0105] S506: Determine the PTC available power according to the current power consumption, the maximum allowable power and the reserved power of the basic electrical equipment.

[0106] S507, determining whether the PTC available power is greater than the PTC required power.

[0107] If yes, execute S508; if no, execute S509.

[0108] S508: Determine the target charging strategy to charge according to the power required by the PTC.

[0109] S509, determining the target charging strategy to be charging according to the PTC available power.

[0110] S510, according to the target charging strategy, controlling the on-board charger to convert the AC power output by the AC charging pile into DC power, and charging the PTC thermistor through the DC power to realize charging of the power battery; wherein the PTC thermistor is used to heat the coolant of the power battery.

[0111] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0112] Based on the same inventive concept, the embodiment of the present application also provides a battery charging device for implementing the battery charging method involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in one or more battery charging device embodiments provided below can refer to the limitations on the battery charging method above, and will not be repeated here.

[0113] In an exemplary embodiment, as shown in FIG6 , a battery charging device is provided, comprising:

[0114] The command response module 10 is used to respond to the constant voltage charging command and obtain the configuration code of the on-board charger and the CC signal sent by the AC charging pile;

[0115] The current value determination module 20 is used to determine the corresponding cable current value according to the configuration code and the CC signal;

[0116] A strategy determination module 30, for determining a target charging strategy according to a cable current value, a current input voltage value, an output power capability of an on-board charger, an output power capability of an AC charging pile, a BMS requested voltage value, and a BMS requested current value;

[0117] The battery charging module 40 is used to control the on-board charger to charge the power battery according to the target charging strategy.

[0118] In an exemplary embodiment, the above-mentioned strategy determination module 30 includes:

[0119] The permissible power determination unit is used to determine the maximum permissible power of the on-board charger according to the cable current value, the current input voltage value, the output power capacity of the on-board charger, the output power capacity of the AC charging pile, the BMS requested voltage value and the BMS requested current value;

[0120] An available power determination unit, used to determine the PTC available power according to the maximum allowable power, the DC voltage value and the current DC power;

[0121] A first strategy determination unit is used to determine the target charging strategy to charge according to the power required by the PTC when the available power of the PTC is greater than the power required by the PTC;

[0122] The second strategy determination unit is used to determine the target charging strategy to charge according to the PTC available power when the PTC available power is not greater than the PTC required power.

[0123] In an exemplary embodiment, the above-mentioned allowable power determination unit is specifically used to use the minimum value of the product of the cable current value and the current input voltage value, the output power capacity of the on-board charger, the output power capacity of the AC charging pile, and the product of the BMS requested voltage value and the BMS requested current value as the maximum allowable power of the on-board charger.

[0124] In an exemplary embodiment, the available power determination unit includes:

[0125] The power consumption determination subunit is used to use the ratio between the DC voltage value and the current DC power as the current power consumption of the basic electrical equipment;

[0126] The available power determination subunit is used to determine the PTC available power according to the current power consumption, maximum allowable power and reserved power of the basic electrical equipment.

[0127] In an exemplary embodiment, the battery charging device further includes:

[0128] The current value determination module is used to take the ratio between the PTC required power and the BMS requested voltage value and the sum of the current battery allowed charging current value as the BMS requested current value.

[0129] In an exemplary embodiment, the battery charging module 40 is specifically used to control the on-board charger to convert the AC power output by the AC charging pile into DC power according to the target charging strategy, and charge the PTC thermistor through the DC power to realize charging of the power battery; wherein the PTC thermistor is used to heat the coolant of the power battery.

[0130] Each module in the above-mentioned battery charging device can be implemented in whole or in part by software, hardware or a combination thereof. Each module can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute the operations corresponding to each module.

[0131] In an exemplary embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be shown in FIG7. The computer device includes a processor, a memory, an input / output interface (Input / Output, referred to as I / O) and a communication interface. Among them, the processor, the memory and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store data such as a target charging strategy. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a battery charging method is implemented.

[0132] Those skilled in the art will understand that the structure shown in FIG. 7 is merely a block diagram of a partial structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have a different arrangement of components.

[0133] In an exemplary embodiment, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and the processor implements the steps of the above-mentioned battery charging method when executing the computer program.

[0134] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps of the above-mentioned battery charging method are implemented.

[0135] In one embodiment, a computer program product is provided, comprising a computer program, which implements the steps of the above-mentioned battery charging method when executed by a processor.

[0136] A person of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, an artificial intelligence (AI) processor, etc., but are not limited to this.

[0137] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0138] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A battery charging method, characterized in that: The method comprises: In response to the constant voltage charging instruction, obtain the configuration code of the on-board charger and the charging connection confirmation CC signal sent by the AC charging pile; Determine a corresponding cable current value according to the configuration code and the CC signal; Determine a target charging strategy according to the cable current value, the current input voltage value, the output power capacity of the on-board charger, the output power capacity of the AC charging pile, the battery management system BMS requested voltage value and the BMS requested current value; According to the target charging strategy, the on-board charger is controlled to charge the power battery.

2. The method according to claim 1, characterized in that The determining of the target charging strategy according to the cable current value, the current input voltage value, the output power capability of the on-board charger, the output power capability of the AC charging pile, the battery management system BMS requested voltage value and the BMS requested current value includes: Determine the maximum allowable power of the on-board charger according to the cable current value, the current input voltage value, the output power capacity of the on-board charger, the output power capacity of the AC charging pile, the BMS requested voltage value and the BMS requested current value; Determine the positive temperature coefficient PTC available power according to the maximum allowable power, the DC voltage value and the current DC power; If the PTC available power is greater than the PTC required power, determining the target charging strategy to charge according to the PTC required power; If the PTC available power is not greater than the PTC required power, the target charging strategy is determined to be charging according to the PTC available power.

3. The method according to claim 2, characterized in that The determining the maximum allowable power of the on-board charger according to the cable current value, the current input voltage value, the output power capacity of the on-board charger, the output power capacity of the AC charging pile, the BMS requested voltage value and the BMS requested current value includes: The minimum value of the product of the cable current value and the current input voltage value, the output power capacity of the on-board charger, the output power capacity of the AC charging pile, and the product of the BMS requested voltage value and the BMS requested current value is used as the maximum allowable power of the on-board charger.

4. The method according to claim 2, characterized in that: The determining of the positive temperature coefficient PTC available power according to the maximum allowable power, the DC voltage value and the current DC power includes: The ratio between the DC voltage value and the current DC power is used as the current power consumption of the basic electrical equipment; The PTC available power is determined according to the current power consumption of the basic electrical equipment, the maximum allowable power and the reserved power.

5. The method according to claim 1, characterized in that Before determining the target charging strategy according to the cable current value, the current input voltage value, the output power capability of the on-board charger, the output power capability of the AC charging pile, the battery management system BMS requested voltage value and the BMS requested current value, the method further includes: The ratio of the PTC required power to the BMS requested voltage value and the sum of the current battery allowable charging current value are used as the BMS requested current value.

6. The method according to any one of claims 1 to 5, characterized in that The controlling the on-board charger to charge the power battery according to the target charging strategy includes: According to the target charging strategy, the on-board charger is controlled to convert the AC power output by the AC charging pile into DC power, and the PTC thermistor is charged by the DC power to realize charging of the power battery; wherein the PTC thermistor is used to heat the coolant of the power battery.

7. A battery charging device, characterized in that: The device comprises: The command response module is used to respond to the constant voltage charging command and obtain the configuration code of the on-board charger and the CC signal sent by the AC charging pile; A current value determination module, used to determine a corresponding cable current value according to the configuration code and the CC signal; A strategy determination module, configured to determine a target charging strategy according to the cable current value, the current input voltage value, the output power capability of the on-board charger, the output power capability of the AC charging pile, the BMS requested voltage value, and the BMS requested current value; The battery charging module is used to control the on-board charger to charge the power battery according to the target charging strategy.

8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 6 are implemented.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

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