Power-limiting method for power battery, device, and storage medium

Abstract

A power-limiting method for a power battery, a device, and a storage medium. The method comprises: during charging and discharging of a power battery, collecting real-time voltage of the power battery (S101); when the real-time voltage exceeds an allowable voltage range, performing a current-limiting operation on the power battery, wherein the upper limit of the allowable voltage range is less than a high-voltage protection threshold of the power battery, and the lower limit of the allowable voltage range is greater than a low-voltage protection threshold of the power battery (S102); and when the real-time voltage returns to a voltage recovery range, stopping the current-limiting operation, wherein the voltage recovery range falls within the allowable voltage range, and the voltage recovery range is narrower than the allowable voltage range (S103), thereby implementing power limitation on the power battery. On the one hand, an allowable voltage range is set so that current limiting is applied before the real-time voltage of the power battery reaches a protection threshold, enabling the battery voltage to drop back down; and on the other hand, a voltage recovery range narrower than the allowable voltage range is set so that normal control is promptly restored once the voltage drops back down, thereby improving the reliability of power limitation, reducing power fluctuation, and improving driving experience.

Description

Power limiting method, device and storage medium of power battery

[0001] The present application claims priority to the Chinese patent application No. 202411369214.6, filed on September 27, 2024, to the Chinese Patent Office, the content of which is incorporated herein by reference in its entirety.

[0002] TECHNICAL FIELD

[0003] The present application relates to energy storage battery control, for example, to a power limiting method, device and storage medium of a power battery.

[0004] BACKGROUND

[0005] The power battery in a high-power running state for a long time is prone to reach the upper and lower voltage limits, thereby triggering the overvoltage protection mechanism of the battery. At the same time, the electric vehicle has a high requirement on the performance of the power battery in terms of power response and power change.

[0006] TECHNICAL PROBLEM

[0007] The related art usually limits the power of the power battery before it reaches the upper and lower voltage limits. However, this power limiting method has disadvantages, often causing power jitter phenomenon and reducing the driving experience.

[0008] TECHNICAL SOLUTION

[0009] In a first aspect, the present application provides a power limiting method of a power battery, comprising:

[0010] During the charging and discharging process of the power battery, the real-time voltage of the power battery is collected;

[0011] In response to the real-time voltage exceeding the voltage allowable interval, a current limiting operation is performed on the power battery; wherein the upper limit of the voltage allowable interval is less than the high voltage protection threshold of the power battery, and the lower limit of the voltage allowable interval is greater than the low voltage protection threshold of the power battery;

[0012] After the real-time voltage returns to the voltage recovery interval, the current limiting operation is stopped; wherein the voltage recovery interval belongs to the voltage allowable interval, and the range of the voltage recovery interval is less than the range of the voltage allowable interval.

[0013] In a second aspect, the present application further provides an electronic device, comprising:

[0014] at least one processor; and

[0015] The memory is in communication connection with the at least one processor; wherein the memory stores a computer program which can be executed by the at least one processor, and the computer program is executed by the at least one processor to enable the at least one processor to execute the power limiting method of the power battery.

[0016] In a third aspect, the present application further provides a computer readable storage medium, which stores computer instructions, and the computer instructions are configured to enable a processor to implement the power limiting method of the power battery when executed by the processor.

[0017] Advantages

[0018] Advantages of the present application:

[0019] The power limiting method of the power battery, the device and the storage medium provided by the present application collect the real-time voltage of the power battery during the charging and discharging process of the power battery. In the case that the real-time voltage exceeds the voltage allowable interval, the current limiting operation is performed on the power battery; wherein the upper limit of the voltage allowable interval is less than the high voltage protection threshold of the power battery, and the lower limit of the voltage allowable interval is greater than the low voltage protection threshold of the power battery. After the real-time voltage recovers to the voltage recovery interval, the current limiting operation is stopped; wherein the voltage recovery interval belongs to the voltage allowable interval, and the range of the voltage recovery interval is less than the range of the voltage allowable interval, which realizes the power limitation of the power battery. On the one hand, the voltage allowable interval is set to limit the current before the real-time voltage of the power battery reaches the protection threshold, so that the battery voltage falls back, and on the other hand, the voltage recovery interval smaller than the voltage allowable interval is set to recover the normal control in time after the voltage falls back, which improves the reliability of the power limitation, reduces the occurrence of power jitter, and improves the driving experience.

[0020] BRIEF DESCRIPTION OF DRAWINGS

[0021] Fig. 1 is a schematic diagram of parameter changes before and after power jitter of a power battery according to some implementation modes of the present application;

[0022] Fig. 2 is a flowchart of a power limiting method of a power battery according to some implementation modes of the present application;

[0023] Fig. 3 is a flowchart of another power limiting method of a power battery according to some implementation modes of the present application;

[0024] Fig. 4 is a schematic diagram of setting of a voltage interval according to some implementation modes of the present application;

[0025] Fig. 5 is a SOC-OCV curve diagram of a lithium iron phosphate battery according to some implementation modes of the present application;

[0026] FIG. 6 is a schematic diagram of voltage variation of a lithium iron phosphate battery before and after current limiting operation in charging process at multiple temperatures according to some embodiments of the present application;

[0027] FIG. 7 is a schematic diagram of voltage variation of a lithium iron phosphate battery before and after current limiting operation in discharging process at multiple temperatures according to some embodiments of the present application;

[0028] FIG. 8 is a schematic diagram of an electronic device according to some embodiments of the present application.

[0029] Embodiments of the present application

[0030] FIG. 1 is a schematic diagram of parameter variation of a power battery before and after power fluctuation according to an embodiment of the present application. The related art usually limits the power of the power battery before the power battery reaches the upper and lower limit voltages. However, if the power limitation and recovery mechanism is not reasonably set, the power fluctuation of the power battery as shown in FIG. 1 often occurs when the electric vehicle accelerates or decelerates rapidly. In combination with FIG. 1, the motor speed changes repeatedly in a short time during the power fluctuation, so that the vehicle speed changes frequently, which greatly reduces the driving experience. Another solution is to set multiple levels of current limiting voltages at multiple temperature conditions. In such a method, the current limiting voltages corresponding to the power battery at different temperatures are different, the limiting currents are different, and the recovery voltages are different. Not only does it require a large amount of parameter calibration, but the control logic is also prone to confusion, which is not conducive to the logical analysis and calculation of the power limitation method, and the reliability is poor.

[0031] The power limitation method of the power battery provided in the embodiments of the present application can stabilize the power change while protecting the battery. FIG. 2 is a flowchart of a power limitation method of a power battery according to an embodiment of the present application. Referring to FIG. 2, the power limitation method of the power battery includes the following steps.

[0032] S101, collecting real-time voltage of the power battery in the charging and discharging process of the power battery.

[0033] The power battery refers to an energy storage battery that provides energy source for driving of the electric vehicle. For example, the power battery can include a lithium ion battery. The charging and discharging process includes a charging process and a discharging process. The charging process refers to a process of charging the power battery by using a charging facility. In the charging process, the power and voltage of the power battery increase. The discharging process refers to a process of discharging the power battery to the outside, or a process of supplying power to the power motor of the electric vehicle. In the discharging process, the power and voltage of the power battery decrease. The real-time voltage of the power battery refers to the voltage between the two ends of the power battery in the charging and discharging process. The real-time voltage can be obtained by using a voltage sampling device or a voltage sampling circuit.

[0034] S102, in the case that the real-time voltage exceeds the voltage allowable interval, performing a current limiting operation on the power battery.

[0035] The voltage allowable interval refers to a normal working interval in a working voltage range of the power battery, and the current limiting operation is not triggered in the interval. The working voltage range is a safe voltage range of the power battery, and the upper limit of the working voltage range is a high voltage protection threshold, and the lower limit of the working voltage range is a low voltage protection threshold. The upper limit of the voltage allowable interval is less than the high voltage protection threshold of the power battery, and the lower limit of the voltage allowable interval is greater than the low voltage protection threshold of the power battery. The current limiting operation refers to an operation of reducing the charging and discharging current of the power battery on the basis of the original charging and discharging current. For example, it can be judged whether the collected real-time voltage exceeds the voltage allowable interval. In the case that the real-time voltage exceeds the voltage allowable interval, if the battery output current is a first current, the output current of the power battery can be limited to 50% of the first current in the current limiting operation. Alternatively, in the case that the real-time voltage exceeds the voltage allowable interval, if the battery output current is a first current, the output current of the power battery can be limited to a second current less than the first current in the current limiting operation.

[0036] S103, after the real-time voltage recovers to a voltage recovery interval, stopping the current limiting operation.

[0037] The voltage recovery interval is a smaller voltage interval in the voltage allowable interval. When the real-time voltage recovers to the interval, the current limiting of the power battery is stopped, and the normal current control mechanism is recovered. The voltage recovery interval belongs to the voltage allowable interval, and the range of the voltage recovery interval is smaller than the range of the voltage allowable interval. For example, during the current limiting operation, the real-time voltage of the power battery is still collected. Once it is monitored that the real-time voltage of the power battery recovers to the voltage recovery interval, the limitation of the current is stopped, and the normal current control is recovered.

[0038] The power limiting method of the power battery provided in the embodiment includes the following steps. The real-time voltage of the power battery is collected during the charging and discharging process of the power battery. In the case that the real-time voltage exceeds the voltage allowable interval, a current limiting operation is performed on the power battery. The upper limit of the voltage allowable interval is less than the high voltage protection threshold of the power battery, and the lower limit of the voltage allowable interval is greater than the low voltage protection threshold of the power battery. After the real-time voltage recovers to a voltage recovery interval, the current limiting operation is stopped. The voltage recovery interval belongs to the voltage allowable interval, and the range of the voltage recovery interval is smaller than the range of the voltage allowable interval. The power limitation of the power battery is realized. On the one hand, the voltage allowable interval is set, so that the current limiting is performed before the real-time voltage of the power battery reaches the protection threshold, and the battery voltage is recovered. On the other hand, the voltage recovery interval smaller than the voltage allowable interval is set, so that the normal control is recovered after the voltage is recovered, the reliability of the power limitation is improved, the occurrence of power jitter is reduced, and the driving experience is improved.

[0039] FIG. 3 is a flow diagram of another power limiting method of a power battery according to an embodiment of the present application, and FIG. 4 is a diagram of setting a voltage interval according to an embodiment of the present application. In combination with FIG. 3 and FIG. 4, the power limiting method of the power battery includes:

[0040] S201, collecting a real-time voltage of the power battery in a charging and discharging process of the power battery.

[0041] S201 is the same as S101, and will not be repeated here.

[0042] S202, performing current derating limitation on the power battery in a case that the real-time voltage exceeds the voltage allowed interval and is in the limitation interval.

[0043] There are two cases that the real-time voltage exceeds the voltage allowed interval, one is that the real-time voltage is in the limitation interval, and the other is that the real-time voltage is in the prohibited interval. Here, the limitation interval is described first. The limitation interval refers to an interval outside the voltage allowed interval and not exceeding the high / low voltage protection threshold. The limitation interval includes a feedback limitation interval and a discharging limitation interval. The feedback limitation interval is greater than the upper limit of the voltage allowed interval and less than the high voltage protection threshold. The discharging limitation interval is less than the lower limit of the voltage allowed interval and greater than the low voltage protection threshold. The current derating limitation refers to reducing the real-time current of the power battery, and the real-time current includes charging current and discharging current. Corresponding to the feedback limitation interval and the discharging limitation interval, the current derating limitation includes derating in the feedback process and derating in the discharging process. For example, in the process of charging the power battery, the power battery is fed back. Once the voltage across the power battery is higher than the upper limit of the voltage allowed interval and enters the feedback limitation interval, the charging current of the power battery is reduced to achieve the reduction control of the charging power. In the process of supplying power to the motor by the power battery, the power battery is in the discharging state. Once the voltage across the power battery is lower than the lower limit of the voltage allowed interval and enters the discharging limitation interval, the supply current of the power battery is reduced to achieve the reduction control of the supply power.

[0044] In one aspect, the current reduction limit can be reducing the working current of the power battery to a preset value or a preset percentage, wherein the preset value is less than the current working current and can be determined according to experimental data; and the preset percentage is less than 100%. For example, the preset value can be equal to 1 / 3C, and the preset percentage can be equal to 50%. Using such a reduction method with a fixed value or a fixed percentage of the reduction amount can achieve accurate and reliable reduction of the current, with small calculation amount and high stability. In another aspect, the current reduction limit can be reducing the working current of the power battery to a limit percentage according to the exceeding value of the real-time voltage relative to the voltage allowable interval, wherein the limit percentage is less than 100% and negatively correlated with the exceeding value. In the case where the real-time voltage is higher than the upper limit of the voltage allowable interval, the exceeding value is equal to the difference between the real-time voltage and the upper limit of the voltage allowable interval; in the case where the real-time voltage is lower than the lower limit of the voltage allowable interval, the exceeding value is equal to the difference between the lower limit of the voltage allowable interval and the real-time voltage. Using a reduction method with a reduction percentage negatively correlated with the voltage exceeding value can make the reduction amount more adaptive to the current voltage exceeding situation, so that the reduction effect is faster and better.

[0045] S203, in the case where the real-time voltage exceeds the voltage allowable interval and is in the prohibited interval, performing current zeroing limitation on the power battery.

[0046] Here, the prohibited interval is described again, which refers to the interval exceeding or equal to the high / low voltage protection threshold. The prohibited interval includes the feedback prohibited interval and the discharge prohibited interval, the feedback prohibited interval is greater than or equal to the high voltage protection threshold, and the discharge prohibited interval is less than or equal to the low voltage protection threshold. The current zeroing limitation refers to setting the real-time current of the power battery to 0, and the real-time current includes the charging current and the discharging current. Corresponding to the two prohibited intervals, the feedback prohibited interval and the discharge prohibited interval, the current zeroing limitation includes zeroing in the feedback process and zeroing in the discharging process. For example, in the process of charging the power battery, the power of the power battery is fed back, and once the voltage across the power battery exceeds the voltage allowable interval and enters the feedback prohibited interval, the charging current of the power battery is zeroed to achieve reduction control of the charging power.

[0047] S204, after the real-time voltage recovers to the voltage recovery interval, stopping the current limitation operation.

[0048] Step S204 has the same content as step S103, which will not be described here.

[0049] The power limiting method of the power battery provided in the embodiment is used to limit the current of the power battery in the case that the real-time voltage is in the limiting interval. In the case that the real-time voltage is in the prohibited interval, the current of the power battery is set to zero, and different limiting modes are realized in different cases. In the current limiting mode, on the one hand, the working current of the power battery can be limited to a preset value or a preset percentage, so that the current can be accurately and reliably limited, and the calculation amount is small and the stability is high. On the other hand, the working current of the power battery can be limited to a limiting percentage according to the exceeding value of the real-time voltage relative to the voltage allowed interval, so that the limiting amount is more suitable for the current voltage exceeding situation, and the limiting effect is faster and better.

[0050] Optionally, the upper limit of the voltage allowed interval is not only less than the high-voltage protection threshold, but also greater than the open-circuit voltage of the power battery at 100% state of charge. The lower limit of the voltage allowed interval is not only greater than the low-voltage protection threshold, but also less than the open-circuit voltage of the power battery at 0% state of charge. Corresponding to the upper and lower limits of the voltage allowed interval, the upper limit of the voltage recovery interval is equal to the open-circuit voltage of the power battery at 90% state of charge, and the lower limit of the voltage recovery interval is equal to the open-circuit voltage of the power battery at 10% state of charge.

[0051] Fig. 5 is a State of Charge (SOC)-Open Circuit Voltage (OCV) curve of a lithium iron phosphate battery provided in the embodiment of the application. SOC is the state of charge, and OCV is the open-circuit voltage of the battery. Referring to Fig. 5, the open-circuit voltage of the lithium iron phosphate battery corresponding to 0% SOC to 100% SOC is 2.669V to 3.442V. In addition, the dynamic working voltage of the lithium iron phosphate battery is 2.0V to 3.65V. The high-voltage protection threshold can be equal to the upper limit of the dynamic working voltage of the power battery, so the high-voltage protection threshold of the lithium iron phosphate battery is equal to 3.65V. The low-voltage protection threshold can be equal to the lower limit of the dynamic working voltage of the power battery, so the low-voltage protection threshold of the lithium iron phosphate battery is equal to 2.0V. Therefore, in the case that the power battery is a lithium iron phosphate battery, the voltage allowed interval can be set to 2.5V to 3.6V, and the voltage recovery interval can be set to 3.2V to 3.33V.

[0052] Fig. 6 is a schematic diagram of voltage variation of a lithium iron phosphate battery before and after current limiting operation in charging process at multiple temperatures according to an embodiment of the present application, Fig. 7 is a schematic diagram of voltage variation of a lithium iron phosphate battery before and after current limiting operation in discharging process at multiple temperatures according to an embodiment of the present application, the voltage range of 2.5V to 3.6V and the voltage recovery range of 3.2V to 3.33V are shown in Figs. 6 and 7, the high voltage protection threshold is equal to the upper limit of the dynamic working voltage of the power battery 3.65V, and the low voltage protection threshold is equal to the lower limit of the dynamic working voltage of the power battery 2.0V. The two curves of the charging process (also referred to as feedback) at the same temperature correspond to different states of charge of the power battery, which are 50% and 90% respectively, and the two curves of the discharging process at the same temperature correspond to different states of charge of the power battery, which are 50% and 10% respectively. In combination with Figs. 1, 6 and 7, the power limiting method of the power battery according to the embodiment of the present application can reduce the occurrence rate of power jitter at multiple temperatures, greatly improve the driving experience of the user on the basis of quickly and effectively reducing the power of the power battery.

[0053] Fig. 8 shows a structural schematic diagram of an electronic device that can be used to implement embodiments of the present application. The electronic device can be any form of digital computer, such as a laptop computer, a desktop computer, a workstation, a personal digital assistant, a server, a blade server, a mainframe computer, and other suitable computers. The electronic device can also be any form of mobile device, such as a personal digital processor, a cellular phone, a smart phone, a wearable device (such as a helmet, glasses, a watch, etc.), and other similar computing devices. The components shown herein, their connections, and relationships, and their functions, can be examples and are not intended to limit the implementation described and / or claimed herein.

[0054] As shown in Fig. 8, the electronic device 10 includes at least one processor 11, and a memory, such as a Read-Only Memory (ROM) 12, a Random Access Memory (RAM) 13, etc., which is communicatively connected to the at least one processor 11, wherein the memory stores a computer program that can be executed by the at least one processor. The processor 11 can perform various appropriate actions and processes according to the computer program stored in the Read-Only Memory (ROM) 12 or loaded from the storage unit 18 into the Random Access Memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other through a bus 14. An Input / Output (I / O) interface 15 is also connected to the bus 14.

[0055] A plurality of components in the electronic device 10 are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, a speaker, etc.; a storage unit 18, such as a magnetic disk, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information / data with other devices through a computer network, such as the Internet, and / or various types of telecommunication networks.

[0056] The processor 11 can be any general and / or special-purpose processing component with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a Central Processing Unit (CPU), a Graphic Processing Unit (GPU), any kind of special-purpose Artificial Intelligence (AI) computing chip, any kind of processor running machine learning model algorithms, a Digital Signal Processing (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 11 performs the methods and processes described above, such as the power limiting method for a power battery.

[0057] In some embodiments, the power limiting method for a power battery can be implemented as a computer program tangibly embodied in a computer readable storage medium, such as the storage unit 18. In some embodiments, part or all of the computer program can be loaded and / or installed onto the electronic device 10 via the ROM 12 and / or the communication unit 19. When the computer program is loaded onto the RAM 13 and executed by the processor 11, one or more steps of the power limiting method for a power battery described above can be performed. Alternatively, in other embodiments, the processor 11 can be configured to perform the power limiting method for a power battery by any other appropriate means, such as by means of firmware.

[0058] Various implementations of the systems and techniques described above can be realized in digital electronic circuitry, integrated circuitry, a Field Programmable Gate Array (FPGA), an Application Specific Integrated Circuit (ASIC), an Application Specific Standard Product (ASSP), a System on Chip (SOC), a Complex Programmable Logic Device (CPLD), computer hardware, firmware, software, and / or combinations thereof. These implementations can include implementation in one or more computer programs that are executable and / or interpretable on a programmable system including at least one programmable processor, which can be special or general purpose, coupled to receive data and instructions from, and to transmit data and instructions to, a storage system, at least one input device, and at least one output device.

[0059] Computer programs implementing methods of the present application can be written in any combination of one or more programming languages. These computer programs can be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the computer program, when executed by the processor, implements the functions / acts specified in the flowcharts and / or block diagrams. The computer program can be executed entirely on a machine, partially on a machine, partially on a machine as part of a standalone software package, partially on a machine and partially on a remote machine or entirely on a remote machine or server.

[0060] In the context of this application, a computer-readable storage medium can be a tangible medium that can contain or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. A computer-readable storage medium can include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium can be a machine-readable signal medium. A machine-readable signal medium can include a transitory signal, based one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), or a flash memory, a fiber-optic medium, a compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0061] To provide for interaction with a user, the systems and techniques described here can be implemented on an electronic device having a display device (e.g., a Cathode Ray Tube (CRT) or a Liquid Crystal Display (LCD) monitor) for displaying information to the user and a keyboard and a pointing device (e.g., a mouse or a trackball) by which the user can provide input to the electronic device. Other kinds of devices can be used to provide for interaction with a user as well; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form, including acoustic, speech, or tactile input.

[0062] The systems and techniques described here can be implemented in a computing system that includes a back end component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front end component (e.g., a user computer having a graphical user interface or a Web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such back end, middleware, or front end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0063] The computing system can include clients and servers. A client and server are generally remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system, and solves the defects of large management difficulty and weak business scalability in traditional physical host and virtual private server (VPS) services.

Claims

1. A power limiting method of a power battery, comprising: acquiring a real-time voltage of the power battery during a charging and discharging process of the power battery; performing a current limiting operation on the power battery in response to the real-time voltage exceeding a voltage allowable interval, wherein an upper limit of the voltage allowable interval is less than a high voltage protection threshold of the power battery, and a lower limit of the voltage allowable interval is greater than a low voltage protection threshold of the power battery; stopping the current limiting operation after the real-time voltage returns to a voltage recovery interval, wherein the voltage recovery interval belongs to the voltage allowable interval, and a range of the voltage recovery interval is less than a range of the voltage allowable interval.

2. The power limiting method of a power battery according to claim 1, wherein, the upper limit of the voltage allowable interval is greater than an open circuit voltage of the power battery at 100% state of charge, and the lower limit of the voltage allowable interval is less than the open circuit voltage of the power battery at 0% state of charge; an upper limit of the voltage recovery interval is equal to the open circuit voltage of the power battery at 90% state of charge, and a lower limit of the voltage recovery interval is equal to the open circuit voltage of the power battery at 10% state of charge.

3. The power limiting method of a power battery according to claim 2, wherein, in a case where the power battery is a lithium iron phosphate battery, the voltage allowable interval is 2.5V to 3.6V, and the voltage recovery interval is 3.2V to 3.33V.

4. The power limiting method of a power battery according to claim 1, wherein, the high voltage protection threshold is equal to an upper limit of a dynamic working voltage of the power battery, and the low voltage protection threshold is equal to a lower limit of the dynamic working voltage of the power battery.

5. The power limiting method of a power battery according to any one of claims 1-4, wherein, the current limiting operation on the power battery in response to the real-time voltage exceeding the voltage allowable interval comprises: performing a current derating limiting on the power battery in response to the real-time voltage exceeding the voltage allowable interval and being in a limiting interval, wherein the limiting interval includes a feedback limiting interval greater than the upper limit of the voltage allowable interval and less than the high voltage protection threshold, and a discharging limiting interval less than the lower limit of the voltage allowable interval and greater than the low voltage protection threshold; performing a current zero limiting on the power battery in response to the real-time voltage exceeding the voltage allowable interval and being in a prohibited interval, wherein the prohibited interval includes a feedback prohibited interval greater than or equal to the high voltage protection threshold, and a discharging prohibited interval less than or equal to the low voltage protection threshold.

6. The power limiting method of a power battery according to claim 5, wherein, the current derating limiting on the power battery in response to the real-time voltage being in the limiting interval comprises: derating a working current of the power battery to a preset value or a preset percentage.

7. The power limiting method of a power battery according to claim 5, wherein, the current derating limiting on the power battery in response to the real-time voltage being in the limiting interval comprises: derating the working current of the power battery to a limiting percentage according to an exceeding value of the real-time voltage relative to the voltage allowable interval, wherein the limiting percentage is negatively correlated with the exceeding value.

8. The power limiting method of a power battery according to claim 5, wherein, in a case where the power battery is a lithium iron phosphate battery, the high voltage protection threshold is equal to 3.65V, and the low voltage protection threshold is equal to 2.0V. 9.An electronic device, comprising: at least one processor; and ​ A memory connected in communication with the at least one processor; wherein the memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor to enable the at least one processor to perform the power limiting method of the power battery according to any one of claims 1-8. 10.A computer readable storage medium, the computer readable storage medium storing computer instructions configured to cause a processor to implement the power limiting method of the power battery according to any one of claims 1-8 when executed by the processor.

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