Device and storage medium

Abstract

Electronic device (10) comprising: at least one processor (11); and a memory in communication with the at least one processor (11); wherein the memory stores a computer program that can be executed by the at least one processor (11), characterized in that when the computer program is executed by the at least one processor (11), the at least one processor (11) is configured to to record a real-time voltage of the energy battery during a charging and discharging process of the energy battery; to perform a current limiting operation on the power battery when the real-time voltage exceeds a permissible voltage range, wherein an upper limit of the permissible voltage range is less than a high-voltage protection threshold of the power battery and a lower limit of the permissible voltage range is greater than a low-voltage protection threshold of the power battery; and to interrupt the current limiting operation after restoring the real-time voltage to a voltage recovery range, where the voltage recovery range is within the allowable voltage range and smaller than the allowable voltage range.

Description

Technical area

[0001] The application relates to the technical field of energy storage battery control, in particular to a method for power limitation for energy batteries, a device and a storage medium. State of the art

[0002] Energy batteries operating in high-power mode for extended periods are very likely to reach their upper and lower voltage limits, triggering the battery's overvoltage protection mechanism. Furthermore, electric vehicles place high demands on the characteristics of their energy batteries in terms of power response and power cycling.

[0003] Against this backdrop, existing technology typically limits the power battery's output before it reaches the upper and lower voltage limits. However, the existing power limiting method has deficiencies in setting the limiting timing, which often causes performance jitter and reduces the driving experience. Disclosure of the application

[0004] The present application provides a power limiting method for power batteries, a device, and a storage medium to improve the reliability of power limiting, reduce the occurrence of power jitter, and improve the driving experience.

[0005] According to a first aspect, a method for limiting the power of an energy battery is provided, the method comprising the following steps:

[0006] Capturing a real-time voltage of the energy battery during a charging and discharging process of the energy battery;

[0007] Performing a current limiting operation on the power battery when the real-time voltage exceeds a permissible voltage range, wherein an upper limit of the permissible voltage range is less than a high-voltage protection threshold of the power battery and a lower limit of the permissible voltage range is greater than a low-voltage protection threshold of the power battery; and

[0008] Interrupting the current limiting operation after restoring the real-time voltage to a voltage recovery range, where the voltage recovery range is within the allowable voltage range and smaller than the allowable voltage range.

[0009] Optionally, the upper limit of the permissible voltage range is greater than an open-circuit voltage of the energy battery at a 100% state of charge and the lower limit of the permissible voltage range is less than the open-circuit voltage of the energy battery at a 0% state of charge; and

[0010] wherein, according to the upper limit and the lower limit of the allowable voltage range, an upper limit of the voltage recovery range is equal to the open circuit voltage of the power battery at a 90% state of charge and a lower limit of the voltage recovery range is equal to the open circuit voltage of the power battery at a 10% state of charge.

[0011] Optionally, in case the power battery is a lithium iron phosphate battery, the allowable voltage range is 2.5V to 3.6V and the voltage recovery range is 3.2V to 3.33V.

[0012] Optionally, the high voltage protection threshold is equal to an upper limit of a dynamic working voltage of the energy battery and the low voltage protection threshold is equal to a lower limit of the dynamic working voltage of the energy battery.

[0013] Optionally, the step of performing a current limiting operation on the power battery when the real-time voltage exceeds an allowable voltage range includes:

[0014] Performing a current reduction of the energy battery when the real-time voltage is within a limit range, wherein the limit range comprises a feedback limit range and a discharge limit range, wherein a lower limit of the feedback limit range is greater than the upper limit of the allowable voltage range and an upper limit of the feedback limit range is less than the high-voltage protection threshold, and an upper limit of the discharge limit range is less than the lower limit of the allowable voltage range and a lower limit of the discharge limit range is greater than the low-voltage protection threshold; and

[0015] Performing current zeroing of the energy battery when the real-time voltage is in a prohibited range, the prohibited range including a feedback prohibited range and a discharge prohibited range, a lower limit of the feedback prohibited range being greater than or equal to the high voltage protection threshold and an upper limit of the discharge limit range being less than or equal to the low voltage protection threshold.

[0016] Optionally, the step of performing a power battery current reduction when the real-time voltage is within a limit range includes:

[0017] Reducing a power battery working current to a preset value or a preset percentage.

[0018] Optionally, the step of performing a power battery current reduction when the real-time voltage is within a limit range includes:

[0019] Reducing a working current of the energy battery to a limited percentage corresponding to an overshoot value of the real-time voltage relative to the allowable voltage range, wherein the limited percentage is negatively correlated with the overshoot value.

[0020] Optionally, in case the power battery is a lithium iron phosphate battery, the high voltage protection threshold is 3.65V and the low voltage protection threshold is 2.0V.

[0021] According to a second aspect, an electronic device is provided, the electronic device comprising: at least one processor; and a memory in communication with the at least one processor; wherein the memory stores a computer program executable by the at least one processor, and the at least one processor executes the energy battery power limiting method according to an embodiment of the application when the computer program is executed by the at least one processor.

[0022] According to a third aspect, a computer-readable storage medium is provided, the computer-readable storage medium storing computer instructions configured to implement the energy battery power limiting method according to an embodiment of the application when executed by the processor.

[0023] According to the power battery power limiting method, electronic device, and computer-readable storage medium provided in this application, the real-time voltage of the power battery is detected during the charging and discharging process of the power battery. If the real-time voltage exceeds the allowable voltage range, the power battery is subjected to current limiting operation, where the upper limit of the allowable voltage range is less than the high-voltage protection threshold of the power battery and the lower limit of the allowable voltage range is greater than the low-voltage protection threshold of the power battery.After the real-time voltage is restored to the voltage recovery range, the current limiting operation is interrupted. The voltage recovery range is within the allowable voltage range and is smaller than the allowable voltage range, thereby realizing the power limitation of the power battery. In one aspect, the allowable voltage range is set so that current limiting is performed before the protection threshold is reached and the battery voltage drops. In another aspect, the voltage recovery range is set smaller than the allowable voltage range, so that normal control is restored in time after the voltage drops, thereby improving the reliability of the power limiting, reducing the occurrence of power jitter, and improving the driving experience.

[0024] It should be understood that the content described in this section is not intended to identify the essential or important features of the embodiments of the application, nor is it intended to limit the scope of the application. Other features of the application will be readily understood from the following description. Brief description of the drawings

[0025] To more clearly illustrate the technical solutions in the embodiments of the application, the accompanying drawings required for use in the description of the embodiments are briefly presented below. The accompanying drawings in the following description represent only some embodiments of the application. Those skilled in the relevant technical field can obtain other accompanying drawings based on these accompanying drawings without any creative effort. Fig. Figure 1 is a schematic diagram of parameter changes of a power battery before and after the occurrence of power jitter in the prior art. Fig. 2 is a schematic flow diagram of a method for power limiting for energy batteries according to an embodiment of the application. Fig. 3 is a schematic flow diagram of a method for power limiting for energy batteries according to another embodiment of the application. Fig. 4 is a schematic diagram for setting a voltage range according to an embodiment of the application. Fig. 5 is a SOC-OCV relationship of a lithium iron phosphate battery according to an embodiment of the application. Fig. 6 is a schematic diagram of voltage changes before and after a current limiting operation performed during charging of a lithium iron phosphate battery at different temperatures according to an embodiment of the application. Fig. 7 is a schematic diagram of voltage changes before and after a current limiting operation performed during discharging of a lithium iron phosphate battery at different temperatures according to an embodiment of the application. Fig. 8 shows a schematic diagram of a structure of an electronic device according to an embodiment of the application. Detailed embodiments

[0026] In order to better understand the solutions of the application, the technical solutions in the embodiments of the application are described clearly and completely below in conjunction with the drawings in the embodiments of the application. The described embodiments are only a part of the embodiments of the application, not all of them. Based on the embodiments of the application, all other embodiments obtained by those skilled in the relevant technical field without creative work should fall within the scope of the application.

[0027] It should be noted that the terms "first," "second," etc., are used in the specification and claims, and in the above-referenced drawings of the application, to distinguish similar subject matter and are not necessarily used to describe a particular order or sequence. It should be understood that the data used in this manner may be interchanged, if desired, so that the embodiments of the application described herein may be implemented in a different order than that shown or described herein.In addition, the terms "including" and "comprising" and all variations thereof are intended to encompass non-exclusive inclusions; for example, a process, procedure, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are unclearly listed or that are inherent in that process, procedure, system, product, or device.

[0028] Fig. Figure 1 is a schematic diagram of parameter changes of a power battery before and after the occurrence of power jitter in the prior art. As described in the prior art, the prior art typically limits the power of the power battery before it reaches the upper and lower voltage limits. However, when an electric vehicle suddenly accelerates and decelerates due to inappropriate setting of the power limitation and recovery mechanism using the existing power limitation method, power jitter of the power battery is often caused, as shown in Fig. 1. In conjunction with Fig. 1. During the power jitter process, the engine speed changes repeatedly in a short period of time, causing the vehicle speed to change unpredictably and greatly reducing the driving experience. Of particular importance is how to set a reasonable power limiting strategy to ensure stable power changes while protecting the battery. Another prior art solution is to set multi-stage current limiting voltages separately under different temperature conditions. With such a method, the current limiting voltages to which the power battery corresponds are different at different temperatures, the limiting currents are also different, and the recovery voltages are also different.Not only does it require a large amount of parameter calibration work, but the control logic is also prone to confusion, which is not conducive to the logical combing and calculation of the power limiting method, and the reliability is poor.

[0029] To solve the above problem, an embodiment of the application provides a power limiting method for energy batteries. Fig. 2 is a schematic flow diagram of a method for power limitation for an energy battery according to an embodiment of the application. With reference to Fig. 2, the method for power limitation for energy battery comprises steps of S101-S103.

[0030] S101: Capturing a real-time voltage of the power battery during a charging and discharging process of the power battery.

[0031] Specifically, a power battery refers to an energy storage battery that provides a power source for driving an electric vehicle. For example, the power battery may comprise a lithium-ion battery. The charging and discharging process includes a charging process and a discharging process. The charging process refers to the process of charging the power battery using a charging device. The current and voltage of the power battery increase during the charging process; the discharging process refers to the process of discharging the power battery to the outside, or it may be the process of the power battery supplying power to the power motor of an electric vehicle. During the discharging process, the current and voltage of the power battery decrease. The real-time voltage of a power battery refers to the voltage at both ends of the power battery during the charging and discharging process.The real-time voltage can be determined using a voltage sampling device or a voltage sampling circuit.

[0032] S102: Perform current limiting operation on the power battery when the real-time voltage exceeds an allowable voltage range.

[0033] Specifically, the allowable voltage range refers to the working voltage range under which the power battery operates normally, and the current limiting operation will not be triggered within this range. The working voltage range is the safe voltage range of the power battery, and its upper limit is the high-voltage protection threshold, and its lower limit is the low-voltage protection threshold. The upper limit of the allowable voltage range is less than the high-voltage protection threshold of the power battery, and the lower limit of the allowable voltage range is greater than the low-voltage protection threshold of the power battery. Current limiting operation refers to the operation of reducing the charging and discharging current of the power battery based on the original charging and discharging current.For example, if the real-time voltage exceeds the allowable voltage range, the output current of the power battery may be limited to 50% of a first current in current limiting mode, where the first current is an output current from the power battery when the real-time voltage exceeds the allowable voltage range. In another example, if the real-time voltage exceeds the allowable voltage range, the output current of the power battery may be limited to a second current that is smaller than the first current in current limiting mode, where the first current is the output current of the power battery when the real-time voltage exceeds the allowable voltage range.

[0034] S103: Interrupt the current limit operation after restoring the real-time voltage to a voltage recovery range.

[0035] Specifically, the voltage recovery range is a smaller voltage range within the allowable voltage range. When the real-time voltage is restored to this range, the current limiting operation of the power battery is interrupted, and the normal current control mechanism functions. The voltage recovery range is within the allowable voltage range and is smaller than the allowable voltage range. For example, during current limiting operation, the real-time voltage of the power battery is continuously detected and monitored; once it is detected that the real-time voltage has been restored to the voltage recovery range, the current limiting operation is interrupted, and normal current control functions.

[0036] According to the power battery power limiting method provided in this embodiment, the real-time voltage of the power battery is detected during the charging and discharging process of the power battery. When the real-time voltage exceeds the allowable voltage range, the power battery is subjected to current limiting operation, where the upper limit of the allowable voltage range is less than the high-voltage protection threshold of the power battery and the lower limit of the allowable voltage range is greater than the low-voltage protection threshold of the power battery. After the real-time voltage is restored to the voltage recovery range, the current limiting operation is interrupted, where the voltage recovery range is within the allowable voltage range and less than the allowable voltage range, thereby realizing power battery power limiting.In one aspect, the allowable voltage range is set so that current limiting is performed before the protection threshold is reached and the battery voltage drops. In another aspect, the voltage recovery range is set smaller than the allowable voltage range so that normal control is restored in a timely manner after the voltage drops, thereby improving the reliability of power limiting, reducing the occurrence of power jitter, and improving the driving experience.

[0037] Fig. 3 is a schematic flow diagram of a method for power limiting for energy batteries according to another embodiment of the application. Fig. Figure 4 is a schematic diagram for setting a voltage range according to an embodiment of the application. Based on the above embodiments, the method for power limitation for energy batteries in combination with Fig. 3 and Fig. 4 steps from S201-S204.

[0038] S201: Detecting a real-time voltage of a power battery during a charging and discharging process of the power battery.

[0039] Step S201 is the same as the above-mentioned step S101 and will not be described again here.

[0040] Step S102 includes steps S202-S203 as follows.

[0041] S202: Perform power battery current reduction when the real-time voltage is within a limit range.

[0042] Specifically, there are two situations where the real-time voltage exceeds the allowable voltage range. One is that the real-time voltage is within the limit range, and the other is that the real-time voltage is within a prohibited range. Let's first explain the limit range. The limit range refers to the area outside the allowable voltage range but does not exceed the high-voltage and low-voltage protection thresholds. The limit range includes a feedback limit range and a discharge limit range. The feedback limit range has a lower limit greater than the upper limit of the allowable voltage range and an upper limit smaller than the high-voltage protection threshold; and the discharge limit range has an upper limit smaller than the lower limit of the allowable voltage range and a lower limit greater than the low-voltage protection threshold.Current reduction refers to the reduction of the real-time current of the power battery. The real-time current includes a charging current and a discharging current. According to the feedback limit range and the discharge limit range, the current reduction includes a reduction during the feedback process and a reduction during the discharge process. For example, during the charging process of the power battery, feedback is given to the current of the power battery. Once the voltage at both ends of the power battery is higher than the upper limit of the allowable voltage range and enters the feedback limit range, the charging current of the power battery is reduced to achieve reduction control of the charging power. When the power battery supplies power to the electric motor, the power battery is in a discharging state.Once the voltage at both ends of the power battery is lower than the lower limit of the allowable voltage range and enters the discharge limit range, the current supplied by the power battery is reduced to achieve current output reduction control.

[0043] In one aspect, current reduction allows the working current of the power battery to be reduced to a preset value or a preset percentage, where the preset value is smaller than the current working current and can be measured according to experimental data; and the preset percentage is less than 100%. For example, the preset value may be 1 / 3C and the preset percentage may be 50%. Reducing the current to a fixed value or a fixed ratio is accurate and reliable, with low computational effort and high stability. In another aspect, current reduction allows the working current of the power battery to be reduced to a limited percentage corresponding to the overshoot value of the real-time voltage relative to the allowable voltage range, where the limited percentage is less than 100% and negatively correlated with the overshoot value.When the real-time voltage is higher than the upper limit of the allowable voltage range, the overshoot value is equal to the difference between the real-time voltage and the upper limit of the allowable voltage range; when the real-time voltage is lower than the lower limit of the allowable voltage range, the overshoot value is equal to the difference between the lower limit of the allowable voltage range and the real-time voltage. The limited percentage is negatively correlated with the overshoot value, making the current reduction more adaptable to the real-time voltage overshoot value, so the reduction is faster and better.

[0044] S203: Perform current zeroing of the power battery when the real-time voltage is in a prohibited range.

[0045] Specifically, the prohibited area refers to the area whose upper or lower limit exceeds or is equal to the high-voltage and low-voltage protection thresholds. The prohibited area includes a feedback prohibited area and a discharge prohibited area. A lower limit of the feedback prohibited area is greater than or equal to the high-voltage protection threshold, and an upper limit of the discharge limit range is less than or equal to the low-voltage protection threshold. Current zeroing 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 feedback prohibited area and the discharge prohibited area, current zeroing includes zeroing during the feedback process and zeroing during the discharging process. For example, feedback is given to the current of the power battery during the charging process of the power battery.Once the voltage at both ends of the power battery exceeds the allowable voltage range and enters the feedback prohibited area, the charging current of the power battery is set to zero to achieve the reduction control of the charging power.

[0046] S204: Interrupt current limit operation after restoring the real-time voltage to a voltage recovery range.

[0047] Step S204 is the same as the above-mentioned step S103 and is not repeated here.

[0048] In the power battery power limiting method according to this embodiment, current reduction is performed on the power battery when the real-time voltage is within the limit range. When the real-time voltage is within the forbidden range, current zeroing is performed on the power battery. This implements different current limiting methods for different situations. During current reduction, on the one hand, the working current of the power battery can be reduced to a preset value or a preset percentage, thereby achieving accurate and reliable current reduction with low computational effort and high stability.On the other hand, the working current of the power battery can be reduced to a limited percentage according to the overshoot value of the real-time voltage relative to the allowable voltage range, so that the reduction is more adaptable to the current overshoot value of the real-time voltage and the reduction is faster and better.

[0049] Optionally, based on the aforementioned embodiments, the upper limit of the allowable voltage range is not only less than the high-voltage protection threshold, but also greater than the open-circuit voltage of the power battery at 100% charge. The lower limit of the allowable voltage range is not only greater than the low-voltage protection threshold, but also less than the open-circuit voltage of the power battery at 0% charge. According to the upper limit and the lower limit of the allowable voltage range, the upper limit of the voltage recovery range is equal to the open-circuit voltage of the power battery at 90% charge, and the lower limit of the voltage recovery range is equal to the open-circuit voltage of the power battery at 10% charge.

[0050] Fig. Figure 5 is a SOC-OCV relationship of a lithium iron phosphate battery according to an embodiment of the application, where SOC is the state of charge and OCV is the open circuit voltage of the battery. Referring to Fig. 5, for example, the open circuit voltage of the lithium iron phosphate battery ranges from 2.669V to 3.442V between 0% SOC and 100% SOC, and its dynamic working voltage is measured at 2.0V to 3.65V. The high-voltage protection threshold may 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, and the low-voltage protection threshold may 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. If the power battery is a lithium iron phosphate battery, the allowable voltage range can be set to 2.5V to 3.6V, and the voltage recovery range can be set to 3.2V to 3.33V.

[0051] Fig. 6 is a schematic diagram of voltage changes before and after a current limiting operation performed during charging of a lithium iron phosphate battery at different temperatures according to an embodiment of the application. Fig. Figure 7 is a schematic diagram of voltage changes before and after a current limiting operation performed during discharging of a lithium iron phosphate battery at different temperatures according to an embodiment of the application. Fig. 6 and Fig. The energy batteries shown in Figure 7 have an allowable voltage range of 2.5V to 3.6V and a voltage recovery range of 3.2V to 3.33V. The high-voltage protection threshold is equal to the upper limit of the dynamic working voltage of the energy battery, which is 3.65V, and the low-voltage protection threshold is equal to the lower limit of the dynamic working voltage of the energy battery, which is 2.0V. The two curves of the charging process (also called feedback process) at the same temperature correspond to different states of charge of the energy 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 energy battery, which are 50% and 10%, respectively. In conjunction with Fig. 1, Fig. 6 and Fig. 7, the power battery power limiting method according to the embodiments of the application can reduce the occurrence rate of power jitter at different temperatures, thereby quickly and effectively reducing the power of the power battery and significantly improving the user's driving experience.

[0052] Fig. Figure 8 shows a schematic diagram of a structure of an electronic device according to an embodiment of the application. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workbenches, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device may also represent various forms of mobile devices, such as personal digital processors, mobile phones, smartphones, wearable devices (such as helmets, eyeglasses, wristwatches, etc.), and other similar computing devices. The components depicted herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the application described and / or claimed herein.

[0053] As in Fig.As shown in Figure 8, the electronic device 10 comprises at least one processor 11 and a memory in communication and connection with the at least one processor 11, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 11 can perform various suitable actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 into the random access memory (RAM) 13. Various programs and data used for the operation of the electronic device 10 can be stored in the RAM 13. The processor 11, the ROM 12, and the RAM 13 are interconnected via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0054] Several components in the electronic device 10 are connected to the I / O interface 15, which includes: an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, e.g., 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 enables the electronic device 10 to exchange information / data with other devices via a computer network such as the Internet and / or various telecommunications networks.

[0055] Processor 11 may be various general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence computing chips, various processors executing a machine learning model algorithm, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. Processor 11 performs the various methods and processes described above, such as the power battery limiting method.

[0056] In some embodiments, the energy battery power limiting method may be implemented as a computer program embodied in a computer-readable storage medium, such as a memory unit 18. In some embodiments, part or all of the computer program may be loaded and / or installed on the electronic device 10 via ROM 12 and / or the communication unit 19. When the computer program is loaded into RAM 13 and executed by the processor 11, one or more steps of the energy battery power limiting method described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured to perform the energy battery power limiting method in another suitable manner (e.g., via firmware).

[0057] Various embodiments of the systems and techniques described above may be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof.These various embodiments may include: implementing in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be an application-specific or general purpose programmable processor, that can receive data and instructions from a storage system, at least one input device, and at least one output device, and can communicate data and instructions to the storage system, the at least one input device, and the at least one output device.

[0058] The computer programs for implementing the method of the application may be written in any combination of one or more programming languages. These computer programs may be provided to the processor of a general-purpose computer, a special-purpose computer, or other programmable data processing apparatus such that the computer programs, when executed by the processor, implement the function / operation specified in the flowchart and / or block diagram. The computer programs may be executed entirely or partially on the machine, may be executed as a standalone software package partially on the machine and partially on the remote machine, or entirely on the remote machine or on the server.

[0059] In the context of the application, a computer-readable storage medium may be a tangible medium capable of containing or storing a computer program used for, or in combination with, an instruction execution system, apparatus, or equipment. The computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or equipment, or any suitable combination of the above. Alternatively, the computer-readable storage medium may be a machine-readable signal medium.More specific examples of the machine-readable storage medium may include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable read-only memory in compact disk (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the above.

[0060] To provide interaction with a user, the systems and techniques described herein may be implemented on an electronic device that includes: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) for displaying information to a user; a keyboard and a directional device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices may also be used to provide interaction with the user. For example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and user input may be received in any form (including auditory, voice, or tactile input).

[0061] The systems and techniques described herein may be implemented in a computing system (e.g., a data server) including a back-end component, or in a computing system (e.g., an application server) including an intermediate component, or in a computing system (e.g., a user computer having a graphical user interface or a web browser through which the user can interact with an embodiment of the systems and techniques described herein) including a front-end component, or in a computing system including any combination of such back-end component, intermediate component, or front-end component. The components of the system may be interconnected by digital data communications in any form or medium (e.g., a communications network). Examples of the communications network include a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0062] The computing system may include a client and a server. The client and server are usually remote from each other and typically interact via a communications network. The client-server relationship is created by computer programs running on the respective computers, which have a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in a cloud computing service system designed to solve the shortcomings of difficult management and weak business scalability in traditional physical hosts and VPS services.

[0063] It should be understood that the various forms of processes shown above can be used to reorder, add, or delete steps. For example, the steps described in the application can be performed in parallel, sequentially, or in different orders, as long as the desired results of the technical solutions of the application can be achieved, and are not limited here.

Claims

[1] Electronic device (10) comprising: at least one processor (11); and a memory in communication with the at least one processor (11); wherein the memory stores a computer program that can be executed by the at least one processor (11), characterized by that when the computer program is executed by the at least one processor (11), the at least one processor (11) is configured to to record a real-time voltage of the energy battery during a charging and discharging process of the energy battery; to perform a current limiting operation on the power battery when the real-time voltage exceeds a permissible voltage range, wherein an upper limit of the permissible voltage range is less than a high-voltage protection threshold of the power battery and a lower limit of the permissible voltage range is greater than a low-voltage protection threshold of the power battery; and to interrupt the current limiting operation after restoring the real-time voltage to a voltage recovery range, where the voltage recovery range is within the allowable voltage range and smaller than the allowable voltage range. [2] The electronic device (10) according to claim 1, wherein the upper limit of the allowable voltage range is greater than an open circuit voltage of the power battery at a 100% charge level, and the lower limit of the allowable voltage range is less than the open circuit voltage of the power battery at a 0% charge level; and wherein, according to the upper limit and the lower limit of the allowable voltage range, an upper limit of the voltage recovery range is equal to the open circuit voltage of the power battery at a 90% charge level, and a lower limit of the voltage recovery range is equal to the open circuit voltage of the power battery at a 10% charge level. [3] The electronic device (10) according to claim 2, wherein, in case the power battery is a lithium iron phosphate battery, the allowable voltage range is 2.5V to 3.6V and the voltage recovery range is 3.2V to 3.33V. [4] The electronic device (10) according to any one of claims 1 to 3, 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] Electronic device (10) according to one of claims 1 to 4, wherein the at least one processor (11) is further configured, when performing the current limiting operation on the energy battery, to perform a current reduction of the energy battery when the real-time voltage is within a limit range, wherein the limit range comprises a feedback limit range and a discharge limit range, wherein a lower limit of the feedback limit range is greater than the upper limit of the allowable voltage range and an upper limit of the feedback limit range is less than the high-voltage protection threshold, and an upper limit of the discharge limit range is less than the lower limit of the allowable voltage range and a lower limit of the discharge limit range is greater than the low-voltage protection threshold; and to perform current zeroing of the energy battery when the real-time voltage is in a prohibited range, wherein the prohibited range includes a feedback prohibited range and a discharge prohibited range, wherein a lower limit of the feedback prohibited range is greater than or equal to the high-voltage protection threshold and an upper limit of the discharge limit range is less than or equal to the low-voltage protection threshold. [6] The electronic device (10) of claim 5, wherein the at least one processor (11) is further configured to, when performing the current reduction of the power battery, reduce a working current of the power battery to a preset value or a preset percentage. [7] The electronic device (10) of claim 5, wherein the at least one processor (11) is further configured, when performing the current reduction of the power battery, to reduce a working current of the power battery to a limited percentage corresponding to an excess value of the real-time voltage relative to the allowable voltage range, wherein the limited percentage is negatively correlated with the excess value. [8] The electronic device (10) according to claim 5, wherein, in case the power battery is a lithium iron phosphate battery, the high voltage protection threshold is 3.65V and the low voltage protection threshold is 2.0V. [9] Computer-readable storage medium, characterized by that the computer-readable storage medium stores the following computer instructions for implementing a method for limiting power for the energy battery: Capturing a real-time voltage of the energy battery during a charging and discharging process of the energy battery; Performing a current limiting operation on the power battery when the real-time voltage exceeds a permissible voltage range, wherein an upper limit of the permissible voltage range is less than a high-voltage protection threshold of the power battery and a lower limit of the permissible voltage range is greater than a low-voltage protection threshold of the power battery; and Interrupting the current limiting operation after restoring the real-time voltage to a voltage recovery range, where the voltage recovery range is within the allowable voltage range and smaller than the allowable voltage range. [10] The computer-readable storage medium according to claim 9, wherein the upper limit of the allowable voltage range is greater than an open-circuit voltage of the power battery at a 100% state of charge, and the lower limit of the allowable voltage range is less than the open-circuit voltage of the power battery at a 0% state of charge; and wherein, according to the upper limit and the lower limit of the allowable voltage range, an upper limit of the voltage recovery range is equal to the open-circuit voltage of the power battery at a 90% state of charge, and a lower limit of the voltage recovery range is equal to the open-circuit voltage of the power battery at a 10% state of charge. [11] The computer-readable storage medium according to claim 10, wherein, in case the power battery is a lithium iron phosphate battery, the allowable voltage range is 2.5V to 3.6V and the voltage recovery range is 3.2V to 3.33V. [12] The computer-readable storage medium of any one of claims 9 to 11, 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. [13] A computer-readable storage medium according to any one of claims 9 to 12, wherein, when performing the current limiting operation on the power battery, the computer-readable storage medium stores the following computer instructions for implementing the power limiting method for the power battery: Performing a current reduction of the energy battery when the real-time voltage is within a limit range, wherein the limit range comprises a feedback limit range and a discharge limit range, wherein a lower limit of the feedback limit range is greater than the upper limit of the allowable voltage range and an upper limit of the feedback limit range is less than the high-voltage protection threshold, and an upper limit of the discharge limit range is less than the lower limit of the allowable voltage range and a lower limit of the discharge limit range is greater than the low-voltage protection threshold; and Performing current zeroing of the energy battery when the real-time voltage is in a prohibited range, the prohibited range including a feedback prohibited range and a discharge prohibited range, a lower limit of the feedback prohibited range being greater than or equal to the high voltage protection threshold and an upper limit of the discharge limit range being less than or equal to the low voltage protection threshold. [14] The computer-readable storage medium of claim 13, wherein, when performing the power reduction of the power battery, the computer-readable storage medium stores a subsequent computer instruction for implementing the power limitation method for the power battery: Reducing a power battery working current to a preset value or a preset percentage. [15] The computer-readable storage medium of claim 13, wherein, when performing the power reduction of the power battery, the computer-readable storage medium stores a subsequent computer instruction for implementing the power limitation method for the power battery: Reducing a working current of the energy battery to a limited percentage corresponding to an overshoot value of the real-time voltage relative to the allowable voltage range, wherein the limited percentage is negatively correlated with the overshoot value. [16] The computer-readable storage medium according to claim 13, wherein, in case the power battery is a lithium iron phosphate battery, the high voltage protection threshold is 3.65V and the low voltage protection threshold is 2.0V.

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