Battery power control method and device and electronic equipment

Abstract

The embodiment of the invention provides a battery power control method and device and electronic equipment, and the method comprises the steps: obtaining battery parameters of a power battery in a current state, and the battery parameters comprise a first battery power threshold value; in the process that the discharge power of the power battery changes from zero to a first battery power threshold value, motor driving power corresponding to the multiple discharge powers is determined based on the system efficiency; determining the discharge power corresponding to the maximum motor driving power as a second battery power threshold value; and limiting the actual discharge power of the power battery based on the second battery power threshold value in the running process of the vehicle. The upper limit of the discharge power of the battery is dynamically adjusted on the premise of ensuring the safety of the battery through the characteristics of the cooperative power battery and the driving motor, so that the final output power of the whole vehicle driving system is maximized, and the energy utilization efficiency is improved while the dynamic property of the vehicle is improved.

Description

Technical Field

[0001] This application relates to the field of computer technology, and more specifically to a battery power control method, device, and electronic device. Background Technology

[0002] The overall power performance of current pure electric or hybrid vehicles is constrained by the characteristics of both the power battery and the drive motor. The power battery has an inherent characteristic: under the same state of charge and temperature, the higher the discharge current, the lower the output voltage. Simultaneously, the efficiency of the drive motor is closely related to the input voltage; when the battery voltage drops to a low level due to high-current discharge, the motor's operating efficiency decreases significantly. This coupling relationship leads to a systemic problem: in certain high-power demand scenarios, even if the battery provides greater discharge power, the reduced output voltage may prevent the drive motor's final output power from being effectively increased, or even result in energy waste, thus limiting the vehicle's overall power performance and energy efficiency. Summary of the Invention

[0003] In view of this, this application provides a battery power control method, device, and electronic device to help solve the problem that in high-power battery discharge scenarios, the efficiency of the drive motor is reduced due to the drop in battery voltage, which in turn causes the actual output power of the whole vehicle system to be limited and the energy utilization to be insufficient.

[0004] In a first aspect, embodiments of this application provide a battery power control method, including: Obtain the battery parameters of the power battery in the current state, the battery parameters including: a first battery power threshold; During the process of the power battery's discharge power changing from zero to the first battery power threshold, the motor drive power corresponding to multiple discharge powers is determined based on system efficiency; The discharge power corresponding to the maximum motor drive power is determined as the second battery power threshold. During vehicle operation, the actual discharge power of the power battery is limited based on the second battery power threshold.

[0005] In one optional embodiment, the battery parameters further include: open-circuit voltage and total internal resistance; During the process of the power battery's discharge power changing from zero to the first battery power threshold, the motor drive power corresponding to multiple discharge powers is determined based on system efficiency, including: During the process of the power battery's discharge power changing from zero to the first battery power threshold, the battery operating voltage corresponding to multiple discharge powers is calculated based on the open circuit voltage and the total internal resistance. The motor drive power corresponding to multiple discharge powers is determined based on the system efficiency corresponding to different battery operating voltages.

[0006] In one optional embodiment, determining the motor drive power corresponding to multiple discharge powers based on the system efficiency corresponding to different battery operating voltages includes: The system efficiency corresponding to different battery power voltages is obtained based on the pre-stored mapping relationship; The corresponding motor drive power is obtained by multiplying the discharge power by the corresponding system efficiency.

[0007] In one optional embodiment, limiting the actual discharge power of the power battery based on the second battery power threshold includes: In response to the fact that the power demand of the power battery does not exceed the second battery power threshold, the discharge power of the power battery is set to be the same as the power demand. In response to the power demand of the power battery being greater than the second battery power threshold, the discharge power of the power battery is set to be the same as the second battery power threshold.

[0008] In an optional embodiment, the method further includes: When the discharge power of the power battery is detected to be greater than or equal to the product of the second battery power threshold and the power coefficient, and the battery operating voltage is greater than the voltage threshold, the second battery power threshold is increased. The power coefficient is between 0 and 1, and the voltage threshold is the battery operating voltage corresponding to the second battery power threshold.

[0009] In one optional embodiment, during the process of increasing the second battery power threshold, the adjustment stops when any of the following conditions are met: The discharge power of the power battery is less than the product of the second battery power threshold and the power coefficient; or, The battery operating voltage is less than or equal to the voltage threshold; or... The second battery power threshold is equal to the first battery power threshold.

[0010] In one optional embodiment, obtaining the battery parameters of the power battery in its current state includes: Obtain the current temperature and state of charge of the power battery; The open-circuit voltage, total internal resistance, and first battery power threshold of the power battery under the current temperature and state of charge are determined by referring to a table.

[0011] Secondly, embodiments of this application provide a battery power control device, including: The acquisition module is used to acquire the battery parameters of the power battery in the current state, the battery parameters including: a first battery power threshold; The determination module is used to determine the motor drive power corresponding to multiple discharge powers based on system efficiency during the process of the discharge power of the power battery changing from zero to the first battery power threshold. The determining module is further configured to determine the discharge power corresponding to the maximum motor drive power as the second battery power threshold. The control module is used to limit the actual discharge power of the power battery based on the second battery power threshold during vehicle operation.

[0012] Thirdly, embodiments of this application provide an electronic device, including a memory for storing computer program instructions and a processor for executing the program instructions, wherein when the computer program instructions are executed by the processor, the electronic device is triggered to execute the method described in any of the first aspects above.

[0013] Fourthly, embodiments of this application provide a computer-readable storage medium including a stored program, wherein, when the program is executed, it controls the device where the computer-readable storage medium is located to perform the method described in any of the first aspects.

[0014] Fifthly, embodiments of this application provide a computer program product comprising executable instructions that, when executed on a computer, cause the computer to perform the method described in any of the first aspects.

[0015] The solution provided in this application obtains the battery parameters of the power battery in its current state. These parameters include: a first battery power threshold; during the change of the power battery's discharge power from zero to the first battery power threshold, determining the motor drive power corresponding to multiple discharge powers based on system efficiency; determining the discharge power corresponding to the maximum motor drive power as a second battery power threshold; and limiting the actual discharge power of the power battery based on the second battery power threshold during vehicle operation. By coordinating the characteristics of the power battery and the drive motor, the upper limit of the battery discharge power is dynamically adjusted while ensuring battery safety, maximizing the final output power of the entire vehicle drive system, thereby improving energy utilization efficiency while enhancing vehicle power performance. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic flowchart of a battery power control method provided in an embodiment of this application; Figure 2 A schematic flowchart of another battery power control method provided in an embodiment of this application; Figure 3 This is a schematic diagram of the structure of a battery power control device provided in an embodiment of this application; Figure 4 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0018] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0019] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0020] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0021] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0022] Figure 1 This is a flowchart illustrating a battery power control method provided in an embodiment of this application. The method can be executed by an electronic device (such as the processor of a battery management system), such as... Figure 1 As shown, the method may include: Step 101: Obtain the battery parameters of the power battery in its current state.

[0023] Electronic devices monitor the current state of the power battery in real time, which mainly includes the battery temperature and state of charge (SOC). Based on the currently monitored temperature and SOC values, the corresponding battery parameters under the current state can be obtained by querying a pre-calibrated and stored battery characteristic parameter table.

[0024] Optionally, battery parameters may include: First battery power threshold: refers to the maximum instantaneous discharge power allowed under the current battery temperature and SOC, based on the battery's own safety and lifespan. This value is the upper limit of the power range calculated subsequently.

[0025] Open circuit voltage: refers to the terminal voltage of a battery when it is at rest or under no load.

[0026] Total internal resistance: refers to the DC internal resistance of the battery in its current state, and is a key parameter that determines the voltage drop during discharge.

[0027] Step 102: During the process of the power battery's discharge power changing from zero to the first battery power threshold, determine the motor drive power corresponding to multiple discharge powers based on system efficiency.

[0028] The process of calculating motor drive power based on system efficiency for electronic devices may include: during the process of the power battery's discharge power changing from zero to a first battery power threshold, calculating the battery operating voltage corresponding to multiple discharge powers based on the open circuit voltage and total internal resistance, and then determining the motor drive power corresponding to multiple discharge powers based on the system efficiency corresponding to different battery operating voltages.

[0029] The calculation of the battery operating voltage refers to the following formula: V_work = V_ocv - I R_internal, I=Px / V_work, where V_work is the battery operating voltage, V_ocv is the open circuit voltage, R_internal is the total internal resistance, Px is the discharge power, and I is the current.

[0030] Combining the two formulas above, we can obtain the relationship between discharge power, battery operating voltage, open-circuit voltage, and total internal resistance: Px = (V_work) V_ocv- V_work V_work) / R_internal.

[0031] In this embodiment, system efficiency refers to the energy conversion efficiency of electrical energy after the power battery discharges, which is then converted into motor drive power by the vehicle's electric drive system. It is a core indicator for measuring the energy utilization capability of the electric drive system, and its value is affected by the battery operating voltage, motor torque, and motor speed. After obtaining the relationship between different discharge powers and battery operating voltage through the above formula, the electronic device can further determine the system efficiency corresponding to different discharge powers by looking up a table.

[0032] Specifically, the electronic device pre-stores a system efficiency table calibrated through bench testing. This table records the correlation between battery operating voltage, motor speed, motor torque, and system efficiency, which includes losses in the motor itself and its controller. For each calculated battery operating voltage, combined with the vehicle's current motor speed and torque, the system efficiency at that discharge power and battery operating voltage can be obtained by looking up the table. The electronic device multiplies the discharge power by the corresponding system efficiency to obtain the corresponding motor drive power. Through the above calculations, the electronic device can obtain a set of mapping data between discharge power and motor drive power.

[0033] Step 103: Determine the discharge power corresponding to the maximum motor drive power as the second battery power threshold.

[0034] Discharge power and motor drive power are not always positively correlated. As discharge power increases and battery operating voltage decreases, system efficiency will decrease. Eventually, when the discharge power exceeds a certain threshold, the motor drive power will actually decrease. To avoid the situation where increasing discharge power leads to a decrease in motor drive power, electronic devices can set the discharge power corresponding to the maximum motor drive power calculated above as a second battery power threshold.

[0035] Step 104: During vehicle operation, the actual discharge power of the power battery is limited based on the second battery power threshold.

[0036] Specifically, if the power demand from the battery does not exceed the second battery power threshold, the electronic device can set the battery discharge power to be the same as the demand power. If the power demand from the battery exceeds the second battery power threshold, the electronic device can set the battery discharge power to be the same as the second battery power threshold. It can be understood that when the demand power exceeds the second battery power threshold, further increasing the discharge power will not only fail to obtain greater motor drive power but will also increase system energy consumption. Therefore, the electronic device sets the second battery power threshold to the maximum value of the battery discharge power, thereby achieving intelligent control of battery power output.

[0037] This application embodiment solves the problem that the reduction in motor efficiency and the limitation of system output caused by the drop in battery voltage under high power demand by dynamically optimizing the upper limit of battery discharge power and coordinating the voltage drop characteristics of the power battery and the efficiency characteristics of the drive motor. Thus, under the premise of ensuring battery safety, the vehicle can obtain continuous and maximum actual driving power output, and simultaneously improve the vehicle's power performance and energy utilization efficiency.

[0038] In one optional embodiment, when the electronic device detects that the discharge power of the power battery is greater than or equal to the product of a second battery power threshold and a power coefficient, and the battery operating voltage is greater than a voltage threshold, the second battery power threshold can be increased. Here, the power coefficient is between 0 and 1 (e.g., 0.9), and the voltage threshold is the battery operating voltage corresponding to the second battery power threshold. The power coefficient is used to quantify the difference between the theoretical model and the actual output. For example, when the second battery power threshold is set to 100kW and the power coefficient is set to 0.9, the maximum discharge power of the power battery is likely to be around 90kW.

[0039] In scenarios such as vehicle climbing hills, the power demand of the vehicle increases dramatically. When the actual discharge power of the power battery approaches the second power threshold, if the battery power voltage is still greater than the voltage threshold, it indicates that the power battery is still in a safe state. To ensure that the discharge power can truly reach the initially calculated second power threshold, the electronic equipment can increase the second power threshold. For example, when the second battery power threshold is increased to 111kW, the maximum discharge power can reach 100kW (111kW). 0.9), which is the maximum value that the power battery can reach under the current state.

[0040] To ensure the safety of the power battery, the adjustment will stop when any of the following conditions are met during the process of increasing the power threshold of the second battery: (1) The discharge power of the power battery is less than the product of the second battery power threshold and the power coefficient: The vehicle's power demand is not high, and the electronic equipment does not need to adjust the second battery power threshold.

[0041] (2) The battery operating voltage is less than or equal to the voltage threshold: This means that the actual operating point of the power battery has reached the moment when the system efficiency is at its maximum. If the power continues to increase, the system efficiency may drop sharply, resulting in a decrease in the motor drive power.

[0042] (3) The second battery power threshold is equal to the first battery power threshold: This means that the optimized power limit has reached the absolute safety boundary of the battery itself, and the upward adjustment process must be stopped to ensure battery safety.

[0043] The above process enables vehicles to dynamically tap the instantaneous potential of the power battery, allowing the actual available driving power to approach or even reach the theoretical global optimal driving power point as closely as possible, thereby continuously maximizing the vehicle's power performance and energy efficiency under complex and ever-changing actual working conditions.

[0044] Figure 2 This is a flowchart illustrating another battery power control method provided in an embodiment of this application. This method can be executed by a battery management system, such as... Figure 2 As shown, the method may include: Step 201: Monitor battery status.

[0045] The system collects key state parameters of the power battery in real time through sensors, such as battery temperature (T): 25°C, state of charge (SOC): 65%.

[0046] Step 202: Look up the table to obtain the first battery power threshold, open circuit voltage and total internal resistance.

[0047] The system has a three-dimensional lookup table pre-stored based on battery characteristics. Based on T=25°C and SOC=65% obtained in step 201, the core battery parameters corresponding to the current state are obtained by looking up the table: first battery power threshold: 150kW, open circuit voltage: 400V, total internal resistance: 0.4Ω.

[0048] Step 203: Calculate the operating voltage of multiple batteries.

[0049] The system analyzes the battery state at different discharge powers from 0 to 150 kW. A series of discrete candidate discharge power values ​​Px(i) are defined (e.g., in steps of 10 kW: 0, 10, 20, ..., 150 kW). For each Px(i), the state is determined according to the formula Px = (V_ocv) / (V_ocv). The corresponding battery operating voltage V_work(i) is obtained by solving for V_work - V_work²) / R_internal. For example, when Pm = 100 kW, V_work ≈ 368V is calculated; when Pm = 140 kW, V_work ≈ 352V is calculated. Based on the above steps, a set of (Px, V_work) data pairs can be generated.

[0050] Step 204: Obtain system efficiency.

[0051] The system has a pre-stored system efficiency table. For each V_work(i) calculated in step 203, the system efficiency η(i) under that voltage and operating condition can be obtained by looking up the table, taking into account the actual motor speed and torque of the current vehicle. Continuing the previous example, when V_work=368V, it may correspond to η=0.93; when V_work=352V, it may correspond to η=0.88. This step matches a system efficiency for each candidate discharge power, generating a set of (Px, V_work, η) data.

[0052] Step 205: Calculate the driving power of multiple motors.

[0053] According to the formula P_drive(i) = Pm(i) η(i) is used to calculate the final motor drive power that can be transferred to the wheel end for each candidate discharge power. Continuing the previous example, when Pm = 100kW and η = 0.93, P_drive = 93 kW; when Pm = 140kW and η = 0.88, P_drive = 123.2 kW. By iteratively calculating, the system can obtain the curve data of P_drive as a function of Pm.

[0054] Step 206: Determine the second battery power threshold.

[0055] Among all P_drive(i) obtained in step 205, the maximum value P_drive_max is found. Assuming that in this example, P_drive_max = 124.5 kW, its corresponding battery discharge power Pm = 130 kW, the system sets the second battery power threshold to 130 kW. This value is the optimal battery discharge power limit that maximizes the motor drive power under the current battery condition, considering the impact of motor efficiency. The system sends this second battery power threshold to the vehicle control unit (VCU) as the current power upper limit.

[0056] Step 207: Determine whether the adjustment conditions are met.

[0057] The system sets the power coefficient to 0.9, the second battery power threshold to 130kW, and the corresponding voltage threshold to 360V. If a discharge power of 120kW and a battery operating voltage of 366V are detected at a certain moment, the adjustment conditions are met, and the process proceeds to step 208. If the adjustment conditions are not met, the process proceeds to step 209.

[0058] Step 208: Adjust the power threshold of the second battery.

[0059] Increase the power threshold of the second battery to bring the actual discharge power closer to 130kW.

[0060] Step 209: No adjustment is made.

[0061] If the condition is not met in the judgment in step 207 (e.g., the actual power is low, or the actual voltage is not high), the system maintains the current second battery power threshold, and the VCU continues to use this value as a limit for power allocation.

[0062] The above process achieves closed-loop optimization control of the power battery discharge power, which not only finds the static optimal point of system efficiency, but also dynamically and safely taps the battery potential based on real-time operating data, thereby continuously ensuring the best power performance and energy efficiency of the whole vehicle.

[0063] Figure 3This is a schematic diagram of a battery power control device provided in an embodiment of this application. Figure 3 As shown, the device may include: The acquisition module 310 is used to acquire the battery parameters of the power battery in the current state.

[0064] The determination module 320 is used to determine the motor drive power corresponding to multiple discharge powers based on system efficiency during the process of the power battery's discharge power changing from zero to the first battery power threshold.

[0065] The determination module 320 is also used to determine the discharge power corresponding to the maximum motor drive power as the second battery power threshold.

[0066] The control module 330 is used to limit the actual discharge power of the power battery based on the second battery power threshold during vehicle operation.

[0067] Corresponding to the above embodiments, this application also provides an electronic device. Figure 4 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. The electronic device 400 may include a processor 401, a memory 402, and a communication unit 403. These components communicate through one or more buses. Those skilled in the art will understand that the structure of the electronic device shown in the figure does not constitute a limitation on the embodiment of this application. It may be a bus-shaped structure or a star-shaped structure, and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0068] The communication unit 403 is used to establish a communication channel, enabling the electronic device to communicate with other devices. It receives user data from other devices or sends user data to other devices.

[0069] The processor 401 serves as the control center of the electronic device, connecting various parts of the device via interfaces and lines. It executes software programs, instructions, and / or modules stored in the memory 402, and calls data stored in the memory to perform various functions and / or process data. The processor may be composed of integrated circuits (ICs), such as a single packaged IC or multiple packaged ICs with the same or different functions connected together. For example, the processor 401 may consist only of a central processing unit (CPU). In this embodiment, the CPU may have a single processing core or include multiple processing cores.

[0070] The memory 402 is used to store the execution instructions of the processor 401. The memory 402 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk or optical disk.

[0071] When the execution instructions in memory 402 are executed by processor 401, the electronic device 400 is able to perform some or all of the steps in the above embodiments.

[0072] In a specific implementation, this application also provides a computer storage medium, wherein the computer storage medium may store a program, which, when executed, may include some or all of the steps of the various embodiments of the battery power control method provided in this application. The storage medium may be a magnetic disk, optical disk, read-only memory (ROM), or random access memory (RAM), etc.

[0073] In a specific implementation, this application also provides a computer program product, wherein the computer program product includes executable instructions, which, when executed on a computer, cause the computer to perform some or all of the steps in various embodiments of the battery power control method provided in this application.

[0074] This application also provides a non-transitory computer-readable storage medium that stores computer instructions that cause the computer to execute the battery power control method provided in this application.

[0075] The aforementioned non-transitory computer-readable storage medium may be any combination of one or more computer-readable media. A computer-readable medium may be a computer-readable signal medium or a computer-readable storage medium. A computer-readable storage medium may be, for example,—but not limited to—an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of computer-readable storage media (a non-exhaustive list) include: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), or flash memory, optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this document, a computer-readable storage medium may be any tangible medium containing or storing a program that may be used by or in connection with an instruction execution system, apparatus, or device.

[0076] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such propagated data signals may take various forms, including—but not limited to—electromagnetic signals, optical signals, or any suitable combination thereof. Computer-readable signal media may also be any computer-readable medium other than computer-readable storage media, capable of transmitting, propagating, or transmitting programs for use by or in connection with an instruction execution system, apparatus, or device.

[0077] The program code contained on a computer-readable medium may be transmitted using any suitable medium, including—but not limited to—wireless, wire, optical fiber, RF, etc., or any suitable combination thereof.

[0078] Those skilled in the art will clearly understand that the techniques in the embodiments of this application can be implemented using software plus necessary general-purpose hardware platforms. Based on this understanding, the technical solutions in the embodiments of this application, or the parts that contribute to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments of this application or some parts of the embodiments.

[0079] The same or similar parts between the various embodiments in this specification can be referred to mutually. In particular, the device embodiments and terminal embodiments are basically similar to the method embodiments, so the description is relatively simple, and the relevant parts can be referred to the description in the method embodiments.

Claims

1. A battery power control method, characterized in that, include: Obtain the battery parameters of the power battery in the current state, the battery parameters including: a first battery power threshold; During the process of the power battery's discharge power changing from zero to the first battery power threshold, the motor drive power corresponding to multiple discharge powers is determined based on system efficiency; The discharge power corresponding to the maximum motor drive power is determined as the second battery power threshold. During vehicle operation, the actual discharge power of the power battery is limited based on the second battery power threshold.

2. The method according to claim 1, characterized in that, The battery parameters also include: open-circuit voltage and total internal resistance; During the process of the power battery's discharge power changing from zero to the first battery power threshold, the motor drive power corresponding to multiple discharge powers is determined based on system efficiency, including: During the process of the power battery's discharge power changing from zero to the first battery power threshold, the battery operating voltage corresponding to multiple discharge powers is calculated based on the open circuit voltage and the total internal resistance. The motor drive power corresponding to multiple discharge powers is determined based on the system efficiency corresponding to different battery operating voltages.

3. The method according to claim 2, characterized in that, The determination of motor drive power corresponding to multiple discharge powers based on system efficiency at different battery operating voltages includes: The system efficiency corresponding to different battery power voltages is obtained based on the pre-stored mapping relationship; The corresponding motor drive power is obtained by multiplying the discharge power by the corresponding system efficiency.

4. The method according to claim 1, characterized in that, The limitation of the actual discharge power of the power battery based on the second battery power threshold includes: In response to the fact that the power demand of the power battery does not exceed the second battery power threshold, the discharge power of the power battery is set to be the same as the power demand. In response to the power demand of the power battery being greater than the second battery power threshold, the discharge power of the power battery is set to be the same as the second battery power threshold.

5. The method according to claim 2, characterized in that, The method further includes: When the discharge power of the power battery is detected to be greater than or equal to the product of the second battery power threshold and the power coefficient, and the battery operating voltage is greater than the voltage threshold, the second battery power threshold is increased. The power coefficient is between 0 and 1, and the voltage threshold is the battery operating voltage corresponding to the second battery power threshold.

6. The method according to claim 5, characterized in that, During the process of increasing the second battery power threshold, the adjustment will stop when any of the following conditions are met: The discharge power of the power battery is less than the product of the second battery power threshold and the power coefficient; or, The battery operating voltage is less than or equal to the voltage threshold; or... The second battery power threshold is equal to the first battery power threshold.

7. The method according to claim 2, characterized in that, The acquisition of battery parameters of the power battery in its current state includes: Obtain the current temperature and state of charge of the power battery; The open-circuit voltage, total internal resistance, and first battery power threshold of the power battery under the current temperature and state of charge are determined by referring to a table.

8. A battery power control device, characterized in that, include: The acquisition module is used to acquire the battery parameters of the power battery in the current state, the battery parameters including: a first battery power threshold; The determination module is used to determine the motor drive power corresponding to multiple discharge powers based on system efficiency during the process of the discharge power of the power battery changing from zero to the first battery power threshold. The determining module is further configured to determine the discharge power corresponding to the maximum motor drive power as the second battery power threshold. The control module is used to limit the actual discharge power of the power battery based on the second battery power threshold during vehicle operation.

9. An electronic device, characterized in that, The device includes a memory for storing computer program instructions and a processor for executing the program instructions, wherein when the computer program instructions are executed by the processor, the electronic device performs the method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored program, wherein, when the program is executed, it controls the device on which the computer-readable storage medium is located to perform the method according to any one of claims 1 to 7.

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