Charging current control method and device of power battery, vehicle and storage medium

Abstract

The application relates to the technical field of power batteries, in particular to a power battery charging current control method and device, a vehicle and a storage medium, wherein the method comprises the following steps: detecting an actual charging working condition of a power battery, and judging whether the actual charging working condition meets preset current control conditions; in the case that the actual charging working condition meets the preset current control conditions, obtaining a maximum chargeable power of the power battery; calculating a maximum chargeable current of the vehicle according to the maximum chargeable power, a power deviation of a PID controller and a power consumption of an accessory consumer, and controlling the charging of the power battery by using the maximum chargeable current of the vehicle. According to the application, the accurate calculation result of the maximum chargeable current of the vehicle can be obtained by constructing the power deviation of the PID controller, so that the charging rate of the vehicle is improved, the use experience of the user is guaranteed, and the vehicle is more intelligent.

Description

Technical Field

[0001] This application relates to the field of power battery technology, and in particular to a method, device, vehicle, and storage medium for controlling the charging current of a power battery. Background Technology

[0002] As the electric vehicle market continues to expand, the number of electric vehicle drivers is also increasing, and users' requirements for the energy consumption of electric vehicles are also increasing. Reducing energy loss and increasing charging speed to achieve rapid recharging of electric vehicles is one of the goals of current electric vehicle technology development.

[0003] In related technologies, the vehicle control unit (VCU) of an electric vehicle can calculate the maximum allowable charging current by superimposing the maximum dynamic charging power of the battery pack and the power consumption of the vehicle's electrical appliances during DC charging. The battery management system (BMS) then feeds back the maximum allowable charging current to the charging pile and outputs the corresponding charging current for charging.

[0004] However, in related technologies, the charging current is affected not only by the hardware limitations of the battery pack, but also by factors such as the aging of vehicle accessories, charging harnesses, and charging piles. In the process of obtaining the current of vehicle accessories and the actual charging current of the charging pile, it is difficult to accurately collect data, which makes it impossible to ensure that the battery pack charging current is in the expected state of maximum dynamic charging current under the current battery pack condition. This makes it difficult to maximize the vehicle battery charging current under the current environment, reduces the charging speed of the vehicle battery, and urgently needs to be solved. Summary of the Invention

[0005] This application provides a method, device, vehicle, and storage medium for controlling the charging current of a power battery, in order to solve the problems in related technologies where the charging current is affected not only by the hardware limitations of the battery pack, but also by factors such as the aging of vehicle accessories, charging harnesses, and charging piles. Furthermore, it is difficult to accurately collect data in the process of obtaining the current of vehicle accessories and the actual charging current of the charging pile, which makes it impossible to ensure that the battery pack charging current is in the expected state of maximum dynamic charging current under the current battery pack condition, making it difficult to maximize the vehicle battery charging current under the current environment, and reducing the charging speed of the vehicle battery.

[0006] The first aspect of this application provides a method for controlling the charging current of a power battery, comprising the following steps: detecting the actual charging condition of the power battery and determining whether the actual charging condition meets a preset current control condition; if the actual charging condition meets the preset current control condition, obtaining the maximum rechargeable power of the power battery; calculating the maximum rechargeable current of the vehicle based on the maximum rechargeable power, the power deviation of the PID (Proportional Integral Derivative) controller, and the power consumption of the accessory electrical appliances, and using the maximum rechargeable current of the vehicle to control the charging of the power battery.

[0007] Optionally, in one embodiment of this application, obtaining the maximum rechargeable power of the power battery includes: obtaining the actual operating parameters of the power battery; confirming the maximum rechargeable current of the power battery based on the actual operating parameters; and calculating the maximum rechargeable power using the maximum rechargeable current.

[0008] Optionally, in one embodiment of this application, before calculating the maximum rechargeable current of the vehicle based on the maximum rechargeable power, the power deviation of the PID controller, and the power consumption of the accessory electrical appliances, the method further includes: obtaining the current charging current value of the power battery; and inputting the current charging current value and the maximum rechargeable current value into the PID controller to obtain the power deviation output by the PID controller.

[0009] Optionally, in one embodiment of this application, before controlling the charging of the power battery using the maximum rechargeable current of the vehicle, the method further includes: determining whether the power battery meets preset DC charging conditions; if the power battery meets the preset DC charging conditions, then controlling the charging pile to charge the power battery according to the maximum rechargeable current of the vehicle, otherwise ending the charging of the power battery.

[0010] Optionally, in one embodiment of this application, the preset DC charging condition is the actual charging condition of the power battery that allows DC charging.

[0011] Optionally, in one embodiment of this application, the preset current control condition is that the power battery is in a charging power supply connected state.

[0012] A second aspect of this application provides a charging current control device for a power battery, comprising: a detection module for detecting the actual charging conditions of the power battery and determining whether the actual charging conditions meet preset current control conditions; an acquisition module for acquiring the maximum rechargeable power of the power battery when the actual charging conditions meet the preset current control conditions; and a control module for calculating the maximum rechargeable current of the vehicle based on the maximum rechargeable power, the power deviation of the PID controller, and the power consumption of the accessory electrical appliances, and controlling the charging of the power battery using the maximum rechargeable current of the vehicle.

[0013] Optionally, in one embodiment of this application, the acquisition module includes: a first acquisition unit, configured to acquire the actual operating parameters of the power battery; and a calculation unit, configured to determine the maximum rechargeable current of the power battery based on the actual operating parameters, and calculate the maximum rechargeable power using the maximum rechargeable current.

[0014] Optionally, in one embodiment of this application, the control module includes: a second acquisition unit, configured to acquire the current charging current value of the power battery before calculating the maximum rechargeable current of the vehicle based on the maximum rechargeable power, the power deviation of the PID controller, and the power consumption of the accessory electrical appliances; and an input unit, configured to input the current charging current value and the maximum rechargeable current value into the PID controller to obtain the power deviation output by the PID controller.

[0015] Optionally, in one embodiment of this application, it further includes: a judgment module, used to determine whether the power battery meets preset DC charging conditions before charging the power battery using the maximum rechargeable current of the vehicle; and an end module, used to control the charging pile to charge the power battery according to the maximum rechargeable current of the vehicle if the power battery meets the preset DC charging conditions, otherwise end the charging of the power battery.

[0016] Optionally, in one embodiment of this application, the preset DC charging condition is the actual charging condition of the power battery that allows DC charging.

[0017] Optionally, in one embodiment of this application, the preset current control condition is that the power battery is in a charging power supply connected state.

[0018] A third aspect of this application provides a vehicle, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the charging current control method for a power battery as described in the above embodiments.

[0019] A fourth aspect of this application provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described method for controlling the charging current of a power battery.

[0020] A fifth aspect of this application provides a computer program that, when executed, implements the above-described method for controlling the charging current of a power battery.

[0021] This application embodiment can obtain the accurate calculation result of the maximum rechargeable current of the vehicle by constructing the power deviation of the PID controller, thereby improving the charging rate of the vehicle, ensuring the user experience, and making it more intelligent. This solves the problems in related technologies, where the charging current is affected not only by the battery pack hardware limitations but also by factors such as vehicle accessories, aging charging harnesses, and aging charging piles. Furthermore, it is difficult to accurately collect data on the current of vehicle accessories and the actual charging current of the charging pile, resulting in the inability to guarantee that the battery pack charging current is in the expected state of maximum dynamic charging current under the current battery pack conditions. This makes it difficult to maximize the vehicle battery charging current under the current environment, thus reducing the charging speed of the vehicle battery.

[0022] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0023] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0024] Figure 1 This is a flowchart of a charging current control method for a power battery according to an embodiment of this application;

[0025] Figure 2 This is a schematic diagram of the charging current control process of a prior art power battery according to an embodiment of this application;

[0026] Figure 3 This is a schematic diagram of the improved charging current control process of a power battery according to an embodiment of this application;

[0027] Figure 4 This is a schematic diagram of the charging current control device for a power battery according to an embodiment of this application;

[0028] Figure 5 This is a structural schematic diagram of a vehicle according to an embodiment of this application. Detailed Implementation

[0029] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0030] The following description, with reference to the accompanying drawings, outlines a method, apparatus, vehicle, and storage medium for controlling the charging current of a power battery according to embodiments of this application. In the related technologies mentioned in the background section, the charging current is affected not only by the hardware limitations of the battery pack but also by factors such as the aging of vehicle accessories, charging harnesses, and charging piles. Furthermore, accurate data acquisition is difficult when obtaining the current of vehicle accessories and the actual charging current of the charging pile. This makes it impossible to guarantee that the battery pack charging current is in the desired state of maximum dynamic charging current under the current battery pack conditions, hindering the maximization of the vehicle battery charging current under the current environment and reducing the charging speed of the vehicle battery. This application provides a method for controlling the charging current of a power battery. By constructing the power deviation of a PID controller, the precise calculation result of the maximum rechargeable current of the entire vehicle can be obtained, thereby improving the overall vehicle charging rate, ensuring a better user experience, and making the system more intelligent. This solves the problem that in related technologies, the charging current is affected not only by the hardware limitations of the battery pack, but also by factors such as the aging of vehicle accessories, charging harnesses, and charging piles. Furthermore, it is difficult to accurately collect data in the process of obtaining the current of vehicle accessories and the actual charging current of the charging pile, which makes it impossible to ensure that the battery pack charging current is in the expected state of maximum dynamic charging current under the current battery pack condition. This makes it difficult to maximize the vehicle battery charging current under the current environment and reduces the charging speed of the vehicle battery.

[0031] Specifically, Figure 1 This is a schematic flowchart illustrating a method for controlling the charging current of a power battery, as provided in an embodiment of this application.

[0032] like Figure 1 As shown, the charging current control method for this power battery includes the following steps:

[0033] In step S101, the actual charging condition of the power battery is detected, and it is determined whether the actual charging condition meets the preset current control conditions.

[0034] It should be noted that the preset current control conditions can be set by those skilled in the art according to the actual situation, and no specific limitations are made here.

[0035] It is understood that, in the embodiments of this application, the voltage, current, temperature and other parameters of the battery can be monitored and managed by the power battery management and protection system. The power battery management and protection system can obtain charging current, voltage and other data in real time and compare them with preset current control conditions to determine whether the actual charging conditions meet the preset current control conditions.

[0036] Optionally, in one embodiment of this application, the preset current control condition is that the power battery is in a charging power supply connected state.

[0037] In actual operation, the charging gun or charging pile used for charging the vehicle's power battery has a data interface that can provide real-time data during the charging process, such as current, voltage, and charging time. Therefore, it can be used to determine whether the actual charging conditions meet the preset current control conditions, that is, whether the vehicle's power battery has been connected to the charging gun or charging pile or other charging equipment.

[0038] In step S102, the maximum rechargeable power of the power battery is obtained when the actual charging conditions meet the preset current control conditions.

[0039] It is understood that, in the embodiments of this application, the vehicle controller can obtain relevant data of the power battery on the CAN (Controller Area Network) bus to calculate the maximum rechargeable power of the power battery.

[0040] Optionally, in one embodiment of this application, obtaining the maximum rechargeable power of the power battery includes: obtaining the actual operating parameters of the power battery; confirming the maximum rechargeable current of the power battery based on the actual operating parameters; and calculating the maximum rechargeable power using the maximum rechargeable current.

[0041] In actual operation, the maximum rechargeable current of the power battery can be calculated based on its actual operating parameters, and then the maximum rechargeable power can be calculated from the maximum rechargeable current. This helps to ensure the safety of the charging process and improve charging efficiency and accuracy.

[0042] In step S103, the maximum rechargeable current of the vehicle is calculated based on the maximum rechargeable power, the power deviation of the PID controller, and the power consumption of the accessory electrical appliances, and the maximum rechargeable current of the vehicle is used to control the charging of the power battery.

[0043] It is understood that, in the embodiments of this application, the maximum rechargeable power obtained by the above steps can be superimposed with the power consumption of electrical appliances in the vehicle accessories and the power deviation of the PID controller to obtain the maximum rechargeable current of the whole vehicle for the charging control of the power battery.

[0044] Optionally, in one embodiment of this application, before calculating the maximum rechargeable current of the vehicle based on the maximum rechargeable power, the power deviation of the PID controller, and the power consumption of the accessory electrical appliances, the method further includes: obtaining the current charging current value of the power battery; and inputting the current charging current value and the maximum rechargeable current value into the PID controller to obtain the power deviation output by the PID controller.

[0045] In actual implementation, the battery management system can be used to obtain the current charging current value of the power battery in real time. The current charging current value and the maximum rechargeable current value are input into the PID controller. The PID controller can continuously adjust the output to minimize the deviation between the input signal and the set value, so as to obtain the power deviation output by the PID controller for the control of the vehicle charging current.

[0046] Optionally, in one embodiment of this application, before controlling the charging of the power battery using the maximum rechargeable current of the vehicle, the method further includes: determining whether the power battery meets the preset DC charging conditions; if the power battery meets the preset DC charging conditions, then controlling the charging pile to charge the power battery according to the maximum rechargeable current of the vehicle, otherwise ending the charging of the power battery.

[0047] It should be noted that the preset DC charging conditions can be set by those skilled in the art according to the actual situation, and no specific limitations are made here.

[0048] In actual operation, the battery management system can monitor various parameters of the power battery to determine whether the power battery meets the preset conditions for DC charging. The preset conditions may include, but are not limited to, the battery's status and health, as well as the current charging environment of the power battery. If the power battery does not meet the preset DC charging conditions, the charging process needs to be terminated in time and the problem needs to be addressed and diagnosed.

[0049] Optionally, in one embodiment of this application, the preset DC charging condition is that the actual charging conditions of the power battery allow DC charging.

[0050] In actual operation, the power battery management and protection system can detect whether the current power battery meets the operating conditions for DC charging. For example, if the ambient temperature of the current charging battery is too high, it is considered that the actual charging conditions of the power battery do not allow DC charging, and a corresponding alarm can be issued to the user through the vehicle interaction device.

[0051] The following detailed description of the work content of the embodiments of this application is based on a specific example. Figure 2 This is a schematic diagram of the charging current control process of a prior art power battery according to an embodiment of this application. Figure 3 This is a schematic diagram of the improved charging current control process of a power battery according to an embodiment of this application. Figure 3 The method shown specifically includes:

[0052] Step S301: Begin.

[0053] Among these measures, the charging current control of the power battery is initiated.

[0054] Step S302: Determine whether DC charging is plugged in.

[0055] If the DC charging gun is plugged in, proceed to step S303; otherwise, proceed to step S309.

[0056] Step S303: The VCU obtains the maximum allowable dynamic charging current of the battery pack from the CAN and then calculates the maximum dynamic charging power.

[0057] The maximum dynamic charging power of the power battery is calculated based on the maximum allowable dynamic charging current of the power battery pack.

[0058] Step S304: The VCU superimposes the power consumption of the accessory electrical appliances, the maximum dynamic charging power, and the power deviation of the PID integral controller to calculate the maximum allowable dynamic charging current of the whole vehicle, and sends it to the CAN network.

[0059] The maximum rechargeable current of the vehicle is obtained by superimposing the power consumption of the auxiliary electrical appliances and the power deviation of the PID integral controller onto the maximum dynamic charging power, thereby satisfying the actual charging conditions.

[0060] Step S305: Determine whether the BMS allows DC charging.

[0061] If DC charging is allowed, proceed to step S306; otherwise, proceed to step S309.

[0062] Step S306: The BMS obtains the maximum allowable dynamic charging current of the entire vehicle from the CAN network and sends it to the charging pile.

[0063] Among them, the power battery management system obtains the maximum dynamic charging current that the vehicle can be allowed in real time and sends it to the charging pile.

[0064] Step S307: The charging station outputs current and begins charging.

[0065] The charging pile outputs current based on the maximum allowable dynamic charging current of the vehicle and begins charging the power battery.

[0066] Step S308: PID controller (using the actual charging current of the battery pack and the maximum allowable dynamic charging current of the battery pack as an integral controller).

[0067] Specifically, a PID controller is constructed based on the actual charging current of the battery pack and the maximum allowable dynamic charging current of the battery pack.

[0068] Step S309: End.

[0069] Among them, the charging current control of the power battery is terminated.

[0070] The power battery charging current control method proposed in this application can accurately calculate the maximum rechargeable current of the vehicle by constructing the power deviation of the PID controller, thereby improving the vehicle charging rate, ensuring a better user experience, and making the system more intelligent. This solves the problems in related technologies where the charging current is affected not only by battery pack hardware limitations but also by factors such as vehicle accessories, aging charging harnesses, and aging charging piles. Furthermore, it is difficult to accurately collect data on the current of vehicle accessories and the actual charging current of the charging pile, leading to the inability to guarantee that the battery pack charging current is in the desired state of maximum dynamic charging current under the current battery pack conditions. This makes it difficult to maximize the vehicle battery charging current under the current environment, thus reducing the vehicle battery charging speed.

[0071] Next, referring to the accompanying drawings, a charging current control device for a power battery according to an embodiment of this application is described.

[0072] Figure 4 This is a schematic diagram of the charging current control device for a power battery according to an embodiment of this application.

[0073] like Figure 4 As shown, the charging current control device 10 of the power battery includes: a detection module 100, an acquisition module 200, and a control module 300.

[0074] The detection module 100 is used to detect the actual charging conditions of the power battery and determine whether the actual charging conditions meet the preset current control conditions.

[0075] The acquisition module 200 is used to acquire the maximum rechargeable power of the power battery when the preset current control conditions are met in the actual charging operation.

[0076] The control module 300 is used to calculate the maximum rechargeable current of the vehicle based on the maximum rechargeable power, the power deviation of the PID controller and the power consumption of the accessory electrical appliances, and to control the charging of the power battery using the maximum rechargeable current of the vehicle.

[0077] Optionally, in one embodiment of this application, the acquisition module 200 includes a first acquisition unit and a calculation unit.

[0078] The first acquisition unit is used to acquire the actual operating parameters of the power battery.

[0079] The calculation unit is used to determine the maximum rechargeable current of the power battery based on actual operating parameters, and to calculate the maximum rechargeable power using the maximum rechargeable current.

[0080] Optionally, in one embodiment of this application, the control module 300 includes a second acquisition unit and an input unit.

[0081] The second acquisition unit is used to acquire the current charging current value of the power battery before calculating the maximum rechargeable current of the vehicle based on the maximum rechargeable power, the power deviation of the PID controller, and the power consumption of the accessory electrical appliances.

[0082] The input unit is used to input the current charging current value and the maximum rechargeable current value into the PID controller to obtain the power deviation output by the PID controller.

[0083] Optionally, in one embodiment of this application, the device 10 further includes a determination module and an end module.

[0084] The judgment module is used to determine whether the power battery meets the preset DC charging conditions before using the maximum rechargeable current of the whole vehicle to control the charging of the power battery.

[0085] The termination module is used to control the charging pile to charge the power battery according to the maximum charging current of the whole vehicle if the power battery meets the preset DC charging conditions; otherwise, the charging of the power battery will be terminated.

[0086] Optionally, in one embodiment of this application, the preset DC charging condition is that the actual charging conditions of the power battery allow DC charging.

[0087] Optionally, in one embodiment of this application, the preset current control condition is that the power battery is in a charging power supply connected state.

[0088] It should be noted that the foregoing explanation of the embodiment of the charging current control method for power batteries also applies to the charging current control device for power batteries in this embodiment, and will not be repeated here.

[0089] The charging current control device for a power battery proposed in this application can obtain an accurate calculation result of the maximum rechargeable current of the vehicle by constructing the power deviation of the PID controller, thereby improving the charging rate of the vehicle, ensuring the user experience, and making it more intelligent. This solves the problems in related technologies where the charging current is affected not only by the battery pack hardware limitations but also by factors such as vehicle accessories, aging charging harnesses, and aging charging piles. Furthermore, it is difficult to accurately collect data on the current of vehicle accessories and the actual charging current of the charging pile, resulting in the inability to guarantee that the battery pack charging current is in the desired state of maximum dynamic charging current under the current battery pack conditions, making it difficult to maximize the vehicle battery charging current under the current environment, and reducing the charging speed of the vehicle battery.

[0090] Figure 5 A schematic diagram of the structure of a vehicle provided in an embodiment of this application. The vehicle may include:

[0091] The memory 501, the processor 502, and the computer program stored on the memory 501 and capable of running on the processor 502.

[0092] When the processor 502 executes the program, it implements the power battery charging current control method provided in the above embodiments.

[0093] Furthermore, the vehicle also includes:

[0094] Communication interface 503 is used for communication between memory 501 and processor 502.

[0095] The memory 501 is used to store computer programs that can run on the processor 502.

[0096] The memory 501 may include high-speed RAM memory, and may also include non-volatile memory, such as at least one disk storage device.

[0097] If the memory 501, processor 502, and communication interface 503 are implemented independently, then the communication interface 503, memory 501, and processor 502 can be interconnected via a bus to complete communication between them. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. The bus can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 5The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0098] Optionally, in a specific implementation, if the memory 501, processor 502, and communication interface 503 are integrated on a single chip, then the memory 501, processor 502, and communication interface 503 can communicate with each other through an internal interface.

[0099] Processor 502 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of this application.

[0100] This embodiment also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described method for controlling the charging current of a power battery.

[0101] This embodiment also provides a computer program that, when executed, implements the above-described method for controlling the charging current of a power battery.

[0102] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0103] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0104] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or N executable instructions for implementing custom logic functions or processes, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as should be understood by those skilled in the art to which embodiments of this application pertain.

[0105] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Alternatively, the computer-readable medium may be paper or other suitable media on which the program can be printed, since the program can be obtained electronically by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0106] It should be understood that the various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, the N steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0107] Those skilled in the art will understand that all or part of the steps of the methods in the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.

[0108] Furthermore, the functional units in the various embodiments of this application can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

[0109] The storage medium mentioned above can be a read-only memory, a disk, or an optical disk, etc. Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application.

Claims

1. A method for controlling the charging current of a power battery, characterized in that, Includes the following steps: The actual charging conditions of the power battery are detected, and it is determined whether the actual charging conditions meet the preset current control conditions. Under the condition that the actual charging conditions meet the preset current control conditions, the maximum rechargeable power of the power battery is obtained. The maximum rechargeable power, the power deviation of the PID controller, and the power consumption of the accessory electrical appliances are used to calculate the maximum rechargeable current of the vehicle, and the maximum rechargeable current of the vehicle is used to control the charging of the power battery. Obtaining the maximum rechargeable power of the power battery includes: Obtain the actual operating parameters of the power battery; Based on the actual operating parameters, the maximum rechargeable current of the power battery is determined, and the maximum rechargeable power is calculated using the maximum rechargeable current. Before calculating the maximum rechargeable current of the vehicle based on the maximum rechargeable power, the power deviation of the PID controller, and the power consumption of the accessory electrical appliances, the method further includes: Obtain the current charging current value of the power battery; The current charging current value and the maximum rechargeable current value are input into the PID controller to obtain the power deviation output by the PID controller; Before using the maximum rechargeable current of the vehicle to control the charging of the power battery, the method further includes: Determine whether the power battery meets the preset DC charging conditions; If the power battery meets the preset DC charging conditions, the charging pile is controlled to charge the power battery according to the maximum rechargeable current of the whole vehicle; otherwise, the charging of the power battery is terminated.

2. The method according to claim 1, characterized in that, The preset DC charging conditions are the actual charging conditions of the power battery that allow DC charging.

3. The method according to claim 1, characterized in that, The preset current control condition is that the power battery is in a charging power supply connected state.

4. A charging current control device for a power battery, characterized in that, include: The detection module is used to detect the actual charging conditions of the power battery and determine whether the actual charging conditions meet the preset current control conditions. The acquisition module is used to acquire the maximum rechargeable power of the power battery when the actual charging conditions meet the preset current control conditions. The control module is used to calculate the maximum rechargeable current of the vehicle based on the maximum rechargeable power, the power deviation of the PID controller and the power consumption of the accessory electrical appliances, and to control the charging of the power battery using the maximum rechargeable current of the vehicle. Obtaining the maximum rechargeable power of the power battery includes: Obtain the actual operating parameters of the power battery; Based on the actual operating parameters, the maximum rechargeable current of the power battery is determined, and the maximum rechargeable power is calculated using the maximum rechargeable current. Before calculating the maximum rechargeable current of the vehicle based on the maximum rechargeable power, the power deviation of the PID controller, and the power consumption of the accessory electrical appliances, the method further includes: Obtain the current charging current value of the power battery; The current charging current value and the maximum rechargeable current value are input into the PID controller to obtain the power deviation output by the PID controller; Before using the maximum rechargeable current of the vehicle to control the charging of the power battery, the method further includes: Determine whether the power battery meets the preset DC charging conditions; If the power battery meets the preset DC charging conditions, the charging pile is controlled to charge the power battery according to the maximum rechargeable current of the whole vehicle; otherwise, the charging of the power battery is terminated.

5. The apparatus according to claim 4, characterized in that, The acquisition module includes: The first acquisition unit is used to acquire the actual operating parameters of the power battery; The calculation unit is used to determine the maximum rechargeable current of the power battery based on the actual operating parameters, and to calculate the maximum rechargeable power using the maximum rechargeable current.

6. A vehicle, characterized in that, include: A memory, a processor, and a computer program stored in the memory and executable on the processor, the processor executing the program to implement the charging current control method for a power battery as described in any one of claims 1-3.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that, The program is executed by the processor to implement the charging current control method for the power battery as described in any one of claims 1-3.

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