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

Abstract

The application 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 alternating current 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, a current input voltage value, an output power capability of the vehicle-mounted charger, an output power capability of the alternating current charging pile, a BMS request voltage value and a BMS request current value; and controlling the vehicle-mounted charger to charge a power battery according to the target charging strategy. The method can be applied to different capacity charging pile scenes, and the efficiency and safety of power battery charging 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 cruising range and charging speed of the power battery. 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 and heating coolant. However, 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 applied to charging pile scenarios with different capacities to address 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 based on 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 based on the cable current value, the current input voltage value, the output power capability of the onboard 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, current input voltage value, output power capability of the on-board charger, output power capability of the AC charging pile, BMS requested voltage value, and BMS requested current value.

[0012] determine the PTC available power according to the maximum allowable power, the DC voltage value and the current DC power;

[0013] if the PTC available power is greater than the PTC required power, determine the target charging strategy as charging according to the PTC required power;

[0014] if the PTC available power is not greater than the PTC required power, determine the target charging strategy as charging according to the PTC available power.

[0015] In one of the embodiments, 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 capability of the on-board charger, the output power capability of the AC charging pile, the BMS request voltage value and the BMS request current value, comprising:

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

[0017] In one of the embodiments, the PTC available power is determined according to the maximum allowable power, the DC voltage value and the current DC power, comprising:

[0018] the ratio before the DC voltage value and the current DC power is taken as the current consumption power of the basic power-consuming equipment;

[0019] the PTC available power is determined according to the current consumption power of the basic power-consuming equipment, the maximum allowable power and the reserved power.

[0020] In one of the embodiments, before the 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 request voltage value and the BMS request current value, the method further comprises:

[0021] the ratio between the PTC required power and the BMS request voltage value is taken as the BMS request current value.

[0022] In one of the embodiments, the on-board charger is controlled to charge the power battery according to the target charging strategy, comprising:

[0023] the on-board charger is controlled to convert the AC power output by the AC charging pile into DC power, and charge the PTC thermistor through the DC power, so as to realize charging the power battery, wherein the PTC thermistor is used to heat the cooling liquid of the power battery.

[0024] In a second aspect, the present application further 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 is used to determine the corresponding cable current value according to the configuration code and CC signal;

[0027] A strategy determination module is used to determine the target charging strategy based on 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;

[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 comprising 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 based on 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, which, when executed by a processor, implements the following steps:

[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 based on 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, comprising a computer program, which, when executed by a processor, implements the following steps:

[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 based on 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, obtains the configuration code of the on-board charger and the CC signal sent by the AC charging pile; determines the corresponding cable current value according to the configuration code and 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 requested voltage value and the BMS requested current value; controls the on-board charger to charge the power battery according to the target charging strategy. 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 approach to provide the entire vehicle system with a target charging strategy that matches the maximum output capacity. It is not only applicable to charging pile scenarios of different capacities, but also can 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 following briefly introduces the drawings required for use in the embodiments of the present application or related technical descriptions. 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 any creative work.

[0046] Figure 1 A diagram illustrating an application environment of a battery charging method according to an embodiment;

[0047] Figure 2 A schematic flow chart of a battery charging method according to an embodiment;

[0048] Figure 3 A schematic diagram of a process for determining a target charging strategy in one embodiment;

[0049] Figure 4 FIG1 is a flow chart of determining the available power of a PTC according to an embodiment;

[0050] Figure 5 A schematic flow chart of a battery charging method according to another embodiment;

[0051] Figure 6 is a structural block diagram of a battery charging device in one embodiment;

[0052] Figure 7 FIG. 1 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0054] The battery charging method provided in the embodiment of the present application can be applied to Figure 1 In the application environment shown, the onboard controller 102 communicates with the server 104 via a network. A data storage system can store data that the server 104 needs to process. The data storage system can be integrated with the server 104, or located in the cloud or on another network server. In response to a constant voltage charging command, the onboard controller 102 obtains the configuration code of the onboard charger and the CC (Connector Control) signal sent by the AC charging pile. Based on the configuration code and CC signal, it determines the corresponding cable current value. Based on the cable current value, the current input voltage value, the output power capability of the onboard charger, the output power capability of the AC charging pile, and the battery management system (BMS) requested voltage and current values, it determines the target charging strategy. Based on the target charging strategy, the onboard charger is controlled to charge the power battery. The server 104 can be a standalone physical server, a server cluster or distributed system consisting of multiple physical servers, or a cloud server providing cloud computing services.

[0055] In an exemplary embodiment, Figure 2 As shown, a battery charging method is provided, which is applied to Figure 1 The vehicle controller 102 in FIG. 1 is used as an example to illustrate the invention, 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 command is a charging command issued by the vehicle control system in constant voltage charging mode. The onboard controller responds to this constant voltage charging command and charges the vehicle's power battery according to the steps provided in this embodiment. Specifically, the onboard charger configuration code and the CC signal sent by the AC charging station are first obtained.

[0058] The specifications of the onboard chargers on different vehicles vary. The configuration code can be used to identify the current onboard charger and can be obtained by reading the onboard charger. The CC signal is sent by the AC charging station to the vehicle to inform the AC charging station of its supported capabilities and charging methods. Different CC signals indicate different supported capabilities and charging methods.

[0059] Optionally, the on-board controller first receives a charging instruction, then identifies whether it is a constant voltage charging instruction, and then executes the steps provided in this embodiment if it is determined to be in constant voltage mode. Exemplarily, after receiving an AC charging instruction, it determines whether it is in constant current mode. If so, it executes the high voltage process and closes 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 determines that the charging instruction is a constant voltage charging instruction and executes the steps provided in this embodiment. If it is not in constant voltage mode, it indicates that it is neither constant current mode nor 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. The cable current value is the charging cable capacity represented by the current CC signal.

[0063] S203 : Determine a target charging strategy based on the cable current value, the current input voltage value, the output power capability of the onboard charger, the output power capability of the AC charging pile, the BMS requested voltage value, and the BMS requested current value.

[0064] Specifically, the system identifies its own capabilities based on the cable current and current input voltage. It also identifies the charging station's capabilities based on the onboard charger's output power. It also identifies the charging station's capabilities based on the AC charging station's output power. And it identifies the battery's requested requirements based on the BMS's requested voltage and current. By comparing these four capabilities, the system determines the maximum output capacity it can handle, and selects a target charging strategy that matches that maximum output capacity.

[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 request voltage value can be obtained by reading, and then the BMS request current value can be calculated based on the BMS request 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 a constant voltage charging instruction, the configuration code of the on-board charger and the CC signal sent by the AC charging pile are obtained; the corresponding cable current value is determined based on the configuration code and CC signal; the target charging strategy is determined based on 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; and 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 CC signal, thereby identifying the capacity of the AC charging pile. Then, combining various data to identify the on-board charger's own capabilities, the AC charging pile's pile terminal capabilities, and the battery request requirements, etc., uses a digitized approach to provide the entire vehicle system with a target charging strategy that matches the maximum output capacity. This is not only applicable to charging pile scenarios with different capacities, but also improves the efficiency and safety of power battery charging.

[0070] As an optional implementation in this embodiment, 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.

[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 digital identification of the maximum output capacity for charging the power battery.

[0074] In an exemplary embodiment, Figure 3 As shown, the above S203 includes:

[0075] S301 , determining the maximum allowable power of the on-board charger based on 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.

[0076] Based on the cable current value and the current input voltage value, determine the first value representing its own capacity; based on the output power capacity of the on-board charger, determine the second value representing the gun end capacity; based on the output power capacity of the AC charging pile, determine the third value representing the pile end capacity; based on the BMS request voltage value and the BMS request current value, determine the fourth value representing 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 capability of the on-board charger, the output power capability 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] For example, the output power capability of the on-board charger and the product of the cable current and the current input voltage are first compared. The smaller of the two is then compared with the output power capability of the AC charger. Furthermore, the new smaller value is compared with the product of the BMS requested voltage and the BMS requested current. The minimum of the four values ​​is the maximum allowable power of the on-board charger.

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

[0081] Based on 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. Then, the power consumed by other electrical equipment is subtracted from the maximum allowable power to obtain the PTC available power.

[0082] S303: Determine whether the PTC available power is greater than the PTC required power.

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

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

[0085] S305: Determine the target charging strategy as 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. The smaller value is determined as the charging power indicated by the target charging strategy, thereby improving charging efficiency while ensuring charging safety.

[0087] In an exemplary embodiment, Figure 4 As shown, 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 expressed as DC, and the current DC power is expressed 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 used 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 and can be set to 500W. 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, it is necessary to set a reserved power 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 electrical 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 DC power is used to charge the PTC thermistor to charge the power battery; among them, the PTC thermistor is used to heat the coolant of the power battery.

[0097] The onboard charger receives AC power from the AC charging station and converts it to DC power to power the PTC. Specifically, the vehicle-side controller controls the onboard charger to convert the AC power to DC power at the power level indicated by the target charging strategy, thereby charging the PTC thermistor. The PTC, after operation, heats the power battery's coolant, passing the heated coolant through the water inlet into the power battery. The coolant then flows out of the power battery and is fed into the PTC through the outlet for further heating, thus 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 steps of the vehicle's power battery.

[0099] In an exemplary embodiment, Figure 5 As shown, 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] In step S504 , the minimum value of the product of the cable current value and the current input voltage value, the output power capability of the on-board charger, the output power capability 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: The ratio of the DC voltage value to the current DC power is used as the current power consumption of the basic electrical equipment.

[0105] S506: Determine the PTC available power according to the current power consumption, maximum allowable power and 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 as charging according to the power required by the PTC.

[0109] S509: Determine the target charging strategy as charging according to the PTC available power.

[0110] S510 , according to the target charging strategy, controls the on-board charger to convert the AC power output by the AC charging pile into DC power, and charges the PTC thermistor via the DC power to charge 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 various embodiments described above are displayed in sequence according to the instructions of the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least a portion of the steps in the flowcharts involved in the various embodiments described above can include multiple steps or multiple stages, and these steps or stages are not necessarily executed and completed 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 portion of steps or stages in other steps.

[0112] Based on the same inventive concept, embodiments of the present application further provide a battery charging device for implementing the aforementioned battery charging method. The solution provided by this device is similar to the solution described in the aforementioned method. Therefore, the specific limitations of one or more battery charging device embodiments provided below can be found in the aforementioned limitations of the battery charging method and will not be further elaborated here.

[0113] In an exemplary embodiment, Figure 6 As shown, 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 is configured to determine a target charging strategy based on the cable current value, the current input voltage value, the output power capability of the onboard charger, the output power capability of the AC charging pile, the BMS requested voltage value, and the BMS requested current value;

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

[0118] In an exemplary embodiment, the policy determination module 30 includes:

[0119] The allowable power determination unit is used to determine the maximum allowable power of the on-board charger based on 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;

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

[0121] a first strategy determining unit, configured to determine, when the PTC available power is greater than the PTC required power, that the target charging strategy is to charge according to the PTC required power;

[0122] The second strategy determining unit is configured to determine, when the PTC available power is not greater than the PTC required power, that the target charging strategy is to charge according to the PTC available 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 capability of the on-board charger, the output power capability 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 determining unit includes:

[0125] The power consumption determination subunit is used to use the ratio of the DC voltage value to 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 allowable 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 charge the power battery; wherein the PTC thermistor is used to heat the coolant of the power battery.

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

[0131] In an exemplary embodiment, a computer device is provided. The computer device may be a server, and its internal structure diagram may be as shown in FIG. Figure 7 As shown. The computer device includes a processor, a memory, an input / output interface (Input / Output, abbreviated as I / O) and a communication interface. The processor, memory and input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. 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 computer program in the non-volatile storage medium. The database of the computer device is used to store data such as target charging strategies. 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 Figure 7 The structure shown in the figure is only a block diagram of a part of the 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 component arrangement.

[0133] In an exemplary embodiment, a computer device is provided, including a memory and a processor. The memory stores a computer program, 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] Those skilled in the art will understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program. 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. In particular, any reference to memory, database, or other media used in the embodiments provided in this 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. By way of illustration and not limitation, RAM can take various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The databases involved in the various embodiments provided herein may include at least one of a relational database and a non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the various embodiments provided herein may be, but are not limited to, general-purpose processors, central processing units (CPUs), graphics processing units (GPUs), digital signal processors (DSPs), programmable logic devices (PLDs), quantum computing-based data processing logic devices, artificial intelligence (AI) processors, and the like.

[0137] The technical features of the above embodiments can be combined arbitrarily. In order 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 are merely illustrative of several embodiments of the present application, and the description is relatively specific and detailed, but should not be understood as a limitation on the scope of the patent. It should be noted that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the scope of the present application. Therefore, the scope of protection of the present application should be subject to the appended 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 the maximum allowable power of the on-board charger based on 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 ratio between the DC voltage value and the current DC power is used as the current power consumption of the basic electrical equipment; Determining the PTC available power according to the current power consumption of the basic electrical equipment, the maximum allowable power and the reserved power; If the PTC available power is greater than the PTC required power, determining the target charging strategy to be charging according to the PTC required power; If the PTC available power is not greater than the PTC required power, determining the target charging strategy to be charging according to the PTC available power; 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 the maximum allowable power of the on-board charger 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 includes: The minimum value of the product of the cable current value and the current input voltage value, the output power capability of the on-board charger, the output power capability 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.

3. The method according to claim 1, characterized in that Before determining the target charging strategy based on 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.

4. The method according to any one of claims 1 to 3, 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 charge the power battery; wherein the PTC thermistor is used to heat the coolant of the power battery.

5. 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, configured to determine a corresponding cable current value according to the configuration code and the CC signal; A strategy determination module is configured to determine the maximum allowable power of the on-board charger based on 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; use the ratio between the DC voltage value and the current DC power as the current power consumption of the basic electrical equipment; determine the PTC available power based on the current power consumption of the basic electrical equipment, the maximum allowable power, and the reserved power; if the PTC available power is greater than the PTC required power, determine the target charging strategy to be charging according to the PTC required power; if the PTC available power is not greater than the PTC required power, determine the target charging strategy to be charging according to the PTC available power; The battery charging module is used to control the on-board charger to charge the power battery according to the target charging strategy.

6. 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 4 are implemented.

7. 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 4 are implemented.

8. 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 4 are implemented.

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