Power battery protection method, storage medium, electronic equipment and vehicle

Abstract

The invention relates to a power battery protection method, a storage medium, electronic equipment and a vehicle. The method comprises the steps that under the condition that starting conditions of an overcharge early warning mode are met, a vehicle is controlled to enter the overcharge early warning mode; in the overcharge early warning mode, according to the highest single voltage of the power battery, a first voltage threshold value and the current maximum allowable charging power, an update value of the maximum allowable charging power is determined, and the update value is smaller than the maximum allowable charging power before update; and controlling the power battery according to the updated value. Therefore, the charging power of the power battery can be reduced by reducing the maximum allowable charging power, so that the risk of overcharging of the power battery is reduced, the service life of the power battery is prolonged, and potential safety risks are avoided.

Description

Technical Field

[0001] The present disclosure relates to the field of vehicles, and in particular, to a power battery protection method, a storage medium, an electronic device, and a vehicle. Background Art

[0002] In recent years, hydrogen energy technology and fuel cell vehicles have developed rapidly. In this type of vehicle, the energy form mostly adopts a hybrid power form combining a fuel cell system and a power battery system. This type of vehicle can achieve common power supply through the complementary advantages of the fuel cell and the power battery, provide stable power output for the whole vehicle, and provide a longer cruising range for the vehicle.

[0003] However, the capacity of the power battery system in fuel cell vehicles is usually relatively small, and it can only assist the power of the whole vehicle when the vehicle is in high-power demand working conditions such as acceleration, or store energy when the vehicle is in the states of driving power generation, idling power generation, and braking energy recovery. Especially when the vehicle is stationary, the output power of the fuel cell is used to charge the power battery. Due to the small capacity of the power battery system, if the charging time is too long, the problem of overcharging of the power battery will occur. Summary of the Invention

[0004] The purpose of the present disclosure is to provide a power battery protection method, a storage medium, an electronic device, and a vehicle to reduce the risk of overcharging of the power battery and improve the safety of the vehicle.

[0005] To achieve the above purpose, the first aspect of the present disclosure provides a power battery protection method, including: When the starting conditions of the overcharge warning mode are met, control the vehicle to enter the overcharge warning mode; In the overcharge warning mode, determine an updated value of the maximum allowable charging power according to the highest single-cell voltage of the power battery, a first voltage threshold, and the current maximum allowable charging power, wherein the updated value is less than the maximum allowable charging power before the update; Control the power battery according to the updated value.

[0006] Optionally, the determining the updated value of the maximum allowable charging power according to the highest single-cell voltage of the power battery, a first voltage threshold, and the current maximum allowable charging power in the overcharge warning mode includes: Determine the current maximum allowable charging power according to the real-time temperature and real-time SOC value of the power battery; Determine the ratio of the highest single-cell voltage to the first voltage threshold as a fault coefficient; Determine the updated value according to the current maximum allowable charging power and the fault coefficient.

[0007] Optionally, determining the updated value according to the current maximum allowable charging power and the fault factor includes: If the fault factor is within a first preset range, determining the updated value according to the current maximum allowable charging power and the fault factor; If the fault factor is not within the first preset range, determining the previous updated value as the current updated value.

[0008] Optionally, determining the updated value according to the current maximum allowable charging power and the fault factor includes: Determining the updated value through the following formula :

[0009] where is the current maximum allowable charging power, is the fault factor, is a pre-calibrated coefficient.

[0010] Optionally, in the overcharge warning mode, the method further includes: Obtaining the lowest cell temperature and the highest cell temperature of the power battery; If the lowest cell temperature is greater than the temperature threshold, controlling the power battery system to refrigerate; If the highest cell temperature is less than the temperature threshold, controlling the power battery system to heat; When the power battery system is refrigerating or heating, controlling the fuel cell system to perform a shutdown operation.

[0011] Optionally, in the overcharge warning mode, the method further includes: If the highest cell voltage is greater than a second voltage threshold, controlling the high-voltage circuit of the power battery system to be disconnected through the vehicle controller, where the second voltage threshold is greater than the first voltage threshold; If the information indicating that the high-voltage circuit has been disconnected sent by the vehicle controller is not received within a preset duration, independently cutting off the high-voltage circuit.

[0012] Optionally, the method further includes: If the difference between the real-time SOC value and the SOC threshold characterized by the SOC information is greater than a preset value, the current information indicates that there is a continuous charging current for charging the power battery, and the connection state indicates that the vehicle is not connected to an external charging device, it is determined that the start condition of the overcharge warning mode is satisfied.

[0013] The second aspect of the present disclosure provides a power battery protection device, including: A first control module, configured to control the vehicle to enter the overcharge warning mode when the startup conditions of the overcharge warning mode are met; A first determination module, configured to determine an updated value of the maximum allowable charging power according to the highest single-cell voltage of the power battery, a first voltage threshold, and the current maximum allowable charging power in the overcharge warning mode, where the updated value is less than the maximum allowable charging power before the update; A second control module, configured to control the power battery according to the updated value.

[0014] A third aspect of the present disclosure provides an electronic device, including: A memory, on which a computer program is stored; A processor, configured to execute the computer program in the memory to implement the steps of the method provided in the first aspect of the present disclosure.

[0015] A fourth aspect of the present disclosure provides a non-transitory computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, the steps of the method provided in the first aspect of the present disclosure are implemented.

[0016] A fifth aspect of the present disclosure provides a computer program product, including a computer program, and when the computer program is executed by a processor, the steps provided in the first aspect of the present disclosure are implemented.

[0017] A sixth aspect of the present disclosure provides a vehicle, including the device provided in the second aspect of the present disclosure or the electronic device provided in the third aspect of the present disclosure.

[0018] In the above technical solution, when the vehicle enters the overcharge warning mode, the highest single-cell voltage of the power battery and the first voltage threshold can be used to accurately adjust the current maximum allowable charging power, and the power battery is controlled by using the updated and smaller maximum allowable charging power. In this way, by reducing the maximum allowable charging power, the charging power of the power battery can be effectively reduced, thereby reducing the risk of overcharging of the power battery, prolonging the service life of the power battery, and avoiding potential safety risks.

[0019] Other features and advantages of the present disclosure will be described in detail in the subsequent specific implementation part. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings are used to provide a further understanding of the present disclosure, and constitute a part of the specification, and are used to explain the present disclosure together with the following specific implementation manners, but do not constitute a limitation to the present disclosure. In the drawings: Figure 1 is a flowchart of a power battery protection method provided by an exemplary embodiment of the present disclosure; Figure 2 is a flowchart of a power battery protection method provided by an exemplary embodiment of the present disclosure; Figure 3 is a block diagram of a power battery protection device provided by an exemplary embodiment of the present disclosure; Figure 4 is a block diagram of an electronic device provided by an exemplary embodiment of the present disclosure. Detailed Embodiments

[0021] The following will describe in detail the detailed embodiments of the present disclosure with reference to the accompanying drawings. It should be understood that the detailed embodiments described herein are only for explaining and illustrating the present disclosure, and are not used to limit the present disclosure.

[0022] Figure 1 is a flowchart of a power battery protection method provided by an exemplary embodiment of the present disclosure. This method can be applied to a battery management system (BMS, Battery Management System) on a vehicle. As Figure 1 shown, this method may include S101 to S103.

[0023] S101, when the start condition of the overcharge warning mode is satisfied, control the vehicle to enter the overcharge warning mode.

[0024] Among them, the overcharge warning mode is a mode set to prevent the fuel cell from overcharging the power battery.

[0025] In one embodiment, it is possible to determine whether the start condition of the overcharge warning mode is satisfied according to the state information of the power battery and the connection state between the vehicle and the external charging device. The state information of the power battery may include SOC information and current information. Through the SOC information, it can be judged whether the remaining power of the power battery is relatively high, and through the current information, it can be judged whether the power battery is in a charging state. Through the connection state between the vehicle and the external charging device, it can be judged whether the power battery is charged by the fuel cell of the vehicle or an external charging device (such as a charging pile).

[0026] In this way, by using the monitored state information of the power battery and the connection state with the external charging device, potential overcharge risks of the power battery can be discovered in a timely manner. If a potential overcharge risk of the power battery is found, it is determined that the start condition of the overcharge warning mode is satisfied.

[0027] S102, in the overcharge warning mode, determine an updated value of the maximum allowable charging power according to the highest single-cell voltage of the power battery, the first voltage threshold, and the current maximum allowable charging power.

[0028] Among them, the updated value is less than the maximum allowable charging power before the update.

[0029] S103. Control the power battery according to the updated value.

[0030] Exemplarily, all the cell voltages and the highest voltage of the power battery are detected and reported by the BMS. The first voltage threshold can be preset based on actual requirements, for example, it can be set to 3.6V. Exemplarily, in the overcharge warning mode, within each cycle, the updated value of the maximum allowable charging power can be obtained according to the highest cell voltage of the power battery, the first voltage threshold, and the current maximum allowable charging power to update the maximum allowable charging power. Among them, the length of each cycle can be pre-calibrated based on actual requirements. For example, it can be 10s. Exemplarily, the ratio of the highest cell voltage to the first voltage threshold can be determined, and the updated value of the maximum allowable charging power can be obtained according to this ratio and the current maximum allowable charging power. By using the highest cell voltage and the first voltage threshold of the power battery, a smaller maximum allowable charging power can be determined. Controlling the power battery based on the determined value can reduce the charging power of the power battery, thereby reducing the overcharge risk of the power battery.

[0031] In the above technical solution, when the vehicle enters the overcharge warning mode, the highest cell voltage and the first voltage threshold of the power battery can be used to accurately adjust the current maximum allowable charging power, and the power battery is controlled by using the updated and smaller maximum allowable charging power. In this way, by reducing the maximum allowable charging power, the charging power of the power battery can be effectively reduced, thereby reducing the overcharge risk of the power battery, extending the service life of the power battery, and avoiding potential safety risks.

[0032] In an optional embodiment, the power battery protection method provided by the present disclosure may further include: If the difference between the real-time SOC value and the SOC threshold characterized by the SOC information is greater than the preset value, the current information indicates that there is a continuous charging current for the power battery, and the connection status indicates that the vehicle is not connected to an external charging device, it is determined that the start condition of the overcharge warning mode is satisfied.

[0033] Exemplarily, the real-time SOC value can be determined by using the current integration method or the open circuit voltage method. The SOC threshold can be determined according to the working efficiency and heating power of the power battery. For example, the SOC threshold can be any value between 50% and 70%. At this time, the internal resistance of the power battery is small, the heat generation is low, and the working efficiency is high, which can optimize the energy utilization effect and reduce energy consumption; and the discharge power and the charging power are moderate, which can meet the fuel cell parking charging and the power battery auxiliary discharge requirements, and effectively extend the service life of the power battery. The preset value can be set based on actual requirements. For example, it can be set to 20%. If the real-time SOC value - the SOC threshold > the preset value, it can be determined that the real-time SOC value is high. At this time, if the power battery continues to be charged, there may be an overcharge risk.

[0034] Exemplarily, a current sensor pre-installed in the high-voltage circuit can be used to monitor the charging current. If a charging current for charging the power battery is continuously detected, it can be determined that the power battery is in a charging state.

[0035] Exemplarily, an external charging gun charging signal can be used to determine whether the vehicle is connected to an external charging device. If an external charging gun charging signal is received, it can be determined that the vehicle is connected to the external charging device. At this time, if the power battery is in a charging state, it can be determined that the external charging device is charging the power battery. If the external charging gun charging signal is not received, it can be determined that the vehicle is not connected to the external charging device. At this time, if the power battery is in a charging state, it can be determined that the fuel cell is charging the power battery.

[0036] If the difference between the real-time SOC value and the SOC threshold characterized by the SOC information is greater than the preset value, the current information indicates that there is a continuous charging current for charging the power battery, and the connection state indicates that the vehicle is not connected to the external charging device, it can be determined that the real-time SOC value of the power battery is relatively high, and the fuel cell is charging the power battery. Continuing to charge the power battery may cause overcharging of the power battery. At this time, it can be determined that the starting condition of the overcharge warning mode is satisfied. In this way, by using the monitored state information of the power battery and the connection state with the external charging device, the potential overcharge risk of the power battery can be detected in time, so as to control the vehicle to enter the overcharge warning mode when it is determined that there is a potential overcharge risk of the power battery.

[0037] Figure 2 It is a flowchart of a power battery protection method provided by an exemplary embodiment of the present disclosure. Through this Figure 2 , the implementation process of the power battery protection method provided by the present disclosure can be more clearly understood. As Figure 2 shown, the method may include S201 to S210.

[0038] S201, obtain the connection state between the vehicle and the external charging device, as well as the SOC information and current information of the power battery.

[0039] S202, determine whether the difference between the real-time SOC value and the SOC threshold is greater than the preset value. If so, execute S203; if not, execute S204.

[0040] S203, determine whether the vehicle is connected to the external charging device. If so, execute S205; if not, execute S204.

[0041] S204, determine the current maximum allowable charging power according to the real-time temperature and real-time SOC value of the power battery, and control the power battery according to the current maximum allowable charging power.

[0042] Exemplarily, the correspondence relationship between the temperature, SOC value, and maximum allowable charging power of the power battery can be preset through test results. This correspondence relationship can be represented, for example, by functions, mapping tables, etc. By looking up the preset correspondence relationship, the current maximum allowable charging power corresponding to the real-time temperature and real-time SOC value can be determined, and the charging process of the power battery can be restricted according to the current maximum allowable charging power to ensure the charging safety of the power battery.

[0043] S205, determine whether there is a continuous charging current for charging the power battery. If so, execute S206; if not, execute S204.

[0044] S206, control the vehicle to enter the overcharge warning mode.

[0045] S207, determine the current maximum allowable charging power according to the real-time temperature and real-time SOC value of the power battery.

[0046] S208, determine the ratio of the highest single-cell voltage to the first voltage threshold as the fault coefficient.

[0047] S209, confirm the updated value according to the current maximum allowable charging power and the fault coefficient.

[0048] In one embodiment, the updated value can be confirmed in the following manner: If the fault coefficient is within the first preset range, determine the updated value according to the current maximum allowable charging power and the fault coefficient; If the fault coefficient is not within the first preset range, determine the previous updated value as the current updated value.

[0049] Exemplarily, the first preset range can be pre-calibrated. For example, it can be from 0.9 to 1. If the fault coefficient is within the first preset range, it can be determined that the current maximum allowable charging power of the power battery does not match the current state of the power battery. Continuing to charge at the current maximum allowable charging power poses an overcharge risk. At this time, the updated value can be determined to control the power battery with the updated and smaller maximum allowable charging power to reduce the overcharge risk of the power battery. If the fault coefficient is not within the first preset range, it can be determined that there is no overcharge risk in continuing to charge at the current maximum allowable charging power. At this time, the previous updated value can be determined as the current updated value to keep the current maximum allowable charging power of the power battery unchanged.

[0050] In another embodiment, when the fault coefficient is obtained, the updated value can be directly determined based on the current maximum allowable charging power and the fault coefficient. If the updated value is greater than or equal to the set value (such as 1), the calculated updated value is discarded and the previous updated value is determined as the current updated value; if the updated value is less than the set value, the power battery is controlled according to the calculated updated value.

[0051] Exemplarily, the updated value can be determined by the following formula :

[0052] where is the current maximum allowable charging power, is the fault coefficient, is a pre-calibrated coefficient. For example, the value of can be 10.

[0053] S210, control the power battery according to the updated value.

[0054] In one embodiment, the power battery can be controlled in the following manner: If the difference between the updated value and the current maximum allowable charging power is greater than the reference value, the current maximum allowable charging power is updated according to the updated value, and the power battery is controlled based on the updated maximum allowable charging power.

[0055] If the difference between the updated value and the current maximum allowable charging power is less than or equal to the reference value, continue to control the power battery according to the current maximum allowable charging power.

[0056] Exemplarily, the reference value can be preset based on actual requirements. If the difference between the updated value and the current maximum allowable charging power is greater than the reference value, it can be determined that the current maximum allowable charging power of the power battery does not match the current state of the power battery. To avoid the risk of overcharging the power battery, the updated and smaller maximum allowable charging power can be used to control the power battery. If the difference between the updated value and the current maximum allowable charging power is less than or equal to the reference value, it can be determined that the overcharging risk is small. At this time, the power battery can continue to be controlled according to the current maximum allowable charging power to avoid unnecessary adjustment of the maximum allowable charging power and thus avoid waste of energy.

[0057] Based on Figure 2The battery power protection method shown can, in the non-overcharge warning mode, determine the current maximum allowable charging power suitable for the current state of the power battery based on the real-time temperature and real-time SOC value of the power battery, so as to realize the safe use of the power battery. In the overcharge warning mode, the highest single-cell voltage and the first voltage threshold of the power battery can be used to accurately adjust the current maximum allowable charging power, and the updated maximum allowable charging power is less than the maximum allowable charging power before the update. In this way, by reducing the maximum allowable charging power, the charging power of the power battery can be effectively reduced, thereby reducing the risk of overcharging of the power battery and avoiding potential safety risks. In addition, the specific implementation of some of the above steps has been described in detail above, and the repeated content will not be elaborated here.

[0058] In an optional embodiment, in the overcharge warning mode, the battery power protection method provided by the present disclosure further includes: Obtain the lowest single-cell temperature and the highest single-cell temperature of the power battery; If the lowest single-cell temperature is greater than the temperature threshold, control the power battery system to refrigerate; If the highest single-cell temperature is less than the temperature threshold, control the power battery system to heat; When the power battery system refrigerates or heats, control the fuel cell system to perform a shutdown operation.

[0059] Exemplarily, the lowest single-cell temperature and the highest single-cell temperature of the power battery can be obtained by using temperature sensors pre-set on the power battery. The temperature threshold can be pre-set based on actual needs. For example, it can be set to 0°C. If the lowest single-cell temperature is greater than the temperature threshold, it can be determined that the overall temperature of the power battery is too high, and at this time, the power battery system can be controlled to refrigerate; if the highest single-cell temperature is less than the temperature threshold, it can be determined that the overall temperature of the power battery is too low, and at this time, the power battery system can be controlled to heat. In this way, on the one hand, the temperature of the power battery can be adjusted to make its operating state more ideal, and on the other hand, the current charging power can be consumed to further reduce the possibility of overcharging of the power battery.

[0060] By increasing the power consumption and buffering of heating and refrigeration, the problem of overcharging of the power battery caused by the slow dynamic response of the fuel cell system can be solved, a response cycle can be provided for the shutdown operation of the fuel cell, and the life attenuation caused by the emergency shutdown of the fuel cell system can be avoided.

[0061] In an embodiment, if the overcharge warning mode is exited, the power battery system can be controlled to stop refrigerating and heating.

[0062] In an optional embodiment, in the overcharge warning mode, the battery power protection method provided by the present disclosure further includes: If the highest single-cell voltage is greater than the second voltage threshold, the vehicle controller controls the disconnection of the high-voltage circuit of the power battery system.

[0063] If the information indicating that the high-voltage circuit has been disconnected sent by the vehicle controller is not received within the preset duration, the high-voltage circuit is autonomously cut off.

[0064] Wherein, the second voltage threshold is greater than the first voltage threshold.

[0065] Exemplarily, if the highest single-cell voltage is greater than the second voltage threshold, it can be determined that the power battery voltage is too high, which is very likely to cause damage to the power battery and there is a risk of thermal runaway. By cutting off the high-voltage circuit of the power battery system, the possibility of power battery damage can be reduced, the safety of the vehicle power battery system can be ensured, and the maintenance and replacement costs can be reduced. First, the vehicle controller is used to control the disconnection of the high-voltage circuit of the power battery system, which can ensure that the disconnection of the high-voltage circuit will not affect the operation of other vehicle functions. If the information indicating that the high-voltage circuit has been disconnected sent by the vehicle controller is not received within the preset duration, it can be determined that the vehicle controller fails to control the disconnection of the high-voltage circuit of the power battery system. At this time, the BMS can autonomously cut off the high-voltage circuit to avoid thermal runaway of the power battery.

[0066] In an optional embodiment, in the overcharge warning mode, the power battery protection method provided by the present disclosure further includes: Determining the number of times that the highest single-cell voltage is greater than the first voltage threshold; if the number of times reaches the number threshold, a prompt message for prompting the user that the vehicle power battery has an overcharge risk is generated.

[0067] Exemplarily, the number threshold can be preset based on actual needs. For example, it can be set to 3 times. The single-cell voltage of the power battery can be collected once in each cycle, and the number of times that the highest single-cell voltage is greater than the first voltage threshold is determined. If the number of times reaches the number threshold, it can be determined that the power battery has an overcharge risk, and at this time, a corresponding prompt message can be generated. For example, a prompt message "The vehicle power battery has an overcharge risk" can be displayed on the in-vehicle display screen. Alternatively, a speaker can be provided in the vehicle, and the above prompt message can be broadcast through the speaker to prompt the driver. For another example, the generated prompt message can be uploaded to the vehicle warning platform through the in-vehicle T-BOX for warning.

[0068] In this way, through the generation of the prompt message, the user can be prompted when the vehicle power battery has an overcharge risk, improving the safety of the vehicle.

[0069] In an optional embodiment, the vehicle speed is less than the vehicle speed threshold.

[0070] Among them, the vehicle speed threshold can be preset. If the vehicle speed is less than the vehicle speed threshold, it can be determined that the vehicle is running at an extremely low speed or is in a stationary state. At this time, the output power of the fuel cell is used to charge the power battery. Since the capacity of the power battery system is small, if the charging time is too long, the problem of overcharging of the power battery will occur. Therefore, for vehicles with a vehicle speed less than the vehicle speed threshold, by using the power battery protection method provided by the present disclosure, the risk of overcharging caused by the continuous charging of the power battery by the fuel cell and the problems such as the influence on the service life caused by the emergency shutdown of the fuel cell can be effectively avoided.

[0071] Based on the same inventive concept, the present disclosure also provides a power battery protection device. Figure 3 is a block diagram of a power battery protection device 300 provided by an exemplary embodiment of the present disclosure. Refer to Figure 3 and the power battery protection device 300 may include: A first control module 301, configured to control the vehicle to enter the overcharge warning mode when the start condition of the overcharge warning mode is satisfied; A first determination module 302, configured to determine an updated value of the maximum allowable charging power according to the highest single-cell voltage of the power battery, a first voltage threshold, and the current maximum allowable charging power in the overcharge warning mode, where the updated value is less than the maximum allowable charging power before the update; A second control module 303, configured to control the power battery according to the updated value.

[0072] In the above technical solution, when the vehicle enters the overcharge warning mode, the highest single-cell voltage of the power battery and the first voltage threshold can be used to accurately adjust the current maximum allowable charging power, and the updated and smaller maximum allowable charging power is used to control the power battery. In this way, by reducing the maximum allowable charging power, the charging power of the power battery can be effectively reduced, thereby reducing the risk of overcharging of the power battery, extending the service life of the power battery, and avoiding potential safety risks.

[0073] Optionally, the first determination module 302 includes: A first determination sub-module, configured to determine the current maximum allowable charging power according to the real-time temperature and real-time SOC value of the power battery; A second determination sub-module, configured to determine the ratio of the highest single-cell voltage to the first voltage threshold as a fault coefficient; A third determination sub-module, configured to determine the updated value according to the current maximum allowable charging power and the fault coefficient.

[0074] Optionally, the third determination sub-module includes: A fourth determination sub-module, configured to determine the update value according to the current maximum allowable charging power and the fault coefficient if the fault coefficient is within a first preset range; A fifth determination sub-module, configured to determine the previous update value as the current update value if the fault coefficient is not within the first preset range.

[0075] Optionally, the fourth determination sub-module is configured to determine the update value through the following formula :

[0076] where is the current maximum allowable charging power, is the fault coefficient, is a pre-calibrated coefficient.

[0077] Optionally, the device 300 further includes: A second determination module, configured to obtain the lowest cell temperature and the highest cell temperature of the power battery in the overcharge warning mode; if the lowest cell temperature is greater than a temperature threshold, control the power battery system to refrigerate; if the highest cell temperature is less than the temperature threshold, control the power battery system to heat; when the power battery system is refrigerating or heating, control the fuel cell system to perform a shutdown operation.

[0078] Optionally, the device 300 further includes: A third control module, configured to, in the overcharge warning mode, if the highest cell voltage is greater than a second voltage threshold, control the high-voltage circuit of the power battery system to be disconnected through the vehicle controller, where the second voltage threshold is greater than the first voltage threshold; if information indicating that the high-voltage circuit has been disconnected sent by the vehicle controller is not received within a preset duration, independently cut off the high-voltage circuit.

[0079] Optionally, the device 300 further includes: A third determination module, configured to determine that the start condition of the overcharge warning mode is satisfied if the difference between the real-time SOC value and the SOC threshold indicated by the SOC information is greater than a preset value, the current information indicates that a charging current for charging the power battery continuously exists, and the connection state indicates that the vehicle is not connected to an external charging device.

[0080] Regarding the device in the above embodiments, the specific manners in which each module performs operations have been described in detail in the embodiments related to the method, and will not be elaborated here.

[0081] Figure 4 is a block diagram of an electronic device 700 provided by an exemplary embodiment of the present disclosure. As Figure 4As shown, the electronic device 700 may include: a processor 701 and a memory 702. The electronic device 700 may also include one or more of a multimedia component 703, an input / output (I / O) interface 704, and a communication component 705.

[0082] Among them, the processor 701 is used to control the overall operation of the electronic device 700 to complete all or part of the steps in the above-mentioned power battery protection method. The memory 702 is used to store various types of data to support the operation of the electronic device 700. These data may include, for example, instructions for any application or method operating on the electronic device 700, as well as application-related data, such as contact data, sent and received messages, pictures, audio, video, and so on. The memory 702 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 memory, flash memory, a magnetic disk, or an optical disc. The multimedia component 703 may include a screen and an audio component. The screen may be a touch screen, for example, and the audio component is used to output and / or input audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signal may be further stored in the memory 702 or sent through the communication component 705. The audio component also includes at least one speaker for outputting audio signals. The I / O interface 704 provides an interface between the processor 701 and other interface modules, and the other interface modules may be a keyboard, a mouse, buttons, etc. These buttons may be virtual buttons or physical buttons. The communication component 705 is used for wired or wireless communication between the electronic device 700 and other devices. Wireless communication, such as Wi-Fi, Bluetooth, Near Field Communication (NFC), 2G, 3G, or 4G, or a combination of one or more of them. Accordingly, the communication component 705 may include: a Wi-Fi module, a Bluetooth module, and an NFC module.

[0083] In an exemplary embodiment, the electronic device 700 may be implemented by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components, and is used to execute the above-mentioned power battery protection method.

[0084] In another exemplary embodiment, there is also provided a computer-readable storage medium including program instructions. When the program instructions are executed by a processor, the steps of the above-mentioned power battery protection method are implemented. For example, the computer-readable storage medium may be the above-mentioned memory 702 including program instructions, and the above-mentioned program instructions may be executed by the processor 701 of the electronic device 700 to complete the above-mentioned power battery protection method.

[0085] In another exemplary embodiment, there is also provided a computer program product. The computer program product includes a computer program that can be executed by a processor. When the computer program is executed by the processor, the steps of the above-mentioned power battery protection method are implemented.

[0086] In another exemplary embodiment, there is also provided a computer program product. The computer program product includes a computer program that can be executed by a processor. When the computer program is executed by the processor, the steps of the above-mentioned power battery protection method are implemented.

[0087] The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings. However, the present disclosure is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0088] In addition, it should be noted that, in the above specific embodiments, the various specific technical features described can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the present disclosure does not separately describe various possible combination manners.

[0089] In addition, any combination can be made between various different embodiments of the present disclosure as long as it does not violate the idea of the present disclosure, and it should also be regarded as the content disclosed by the present disclosure.

Claims

1. A power battery protection method, characterized in that: include: When the start condition of the overcharge warning mode is met, controlling the vehicle to enter the overcharge warning mode; In the overcharge warning mode, an updated value of the maximum allowable charging power is determined according to the highest single cell voltage of the power battery, the first voltage threshold, and the current maximum allowable charging power, wherein the updated value is less than the maximum allowable charging power before the update; The power battery is controlled according to the updated value.

2. The method according to claim 1, characterized in that In the overcharge warning mode, determining an updated value of the maximum allowable charging power according to the highest single cell voltage of the power battery, the first voltage threshold, and the current maximum allowable charging power includes: Determining the current maximum allowable charging power according to the real-time temperature and the real-time SOC value of the power battery; Determine the ratio of the highest cell voltage to the first voltage threshold as a fault coefficient; The updated value is determined according to the current maximum allowable charging power and the fault coefficient.

3. The method according to claim 2, characterized in that The determining the update value according to the current maximum allowable charging power and the fault coefficient includes: If the fault coefficient is within a first preset range, determining the update value according to the current maximum allowable charging power and the fault coefficient; If the fault coefficient is not within the first preset range, the previous update value is determined as the current update value.

4. The method according to claim 3, characterized in that The determining the update value according to the current maximum allowable charging power and the fault coefficient includes: The update value is determined by the following formula : in, is the current maximum allowed charging power, is the failure coefficient, are pre-calibrated coefficients.

5. The method according to claim 1, characterized in that In the overcharge warning mode, the method further includes: Obtaining the lowest cell temperature and the highest cell temperature of the power battery; If the lowest cell temperature is greater than the temperature threshold, controlling the power battery system to cool; If the highest cell temperature is lower than the temperature threshold, controlling the power battery system to heat; When the power battery system is cooling or heating, the fuel cell system is controlled to perform a shutdown operation.

6. The method according to claim 1, characterized in that In the overcharge warning mode, the method further includes: If the highest cell voltage is greater than a second voltage threshold, the high-voltage circuit of the power battery system is disconnected by controlling the vehicle controller, wherein the second voltage threshold is greater than the first voltage threshold; If the information indicating that the high-voltage circuit has been disconnected is not received from the vehicle controller within a preset time period, the high-voltage circuit is automatically disconnected.

7. The method according to claim 1, characterized in that The method further comprises: If the SOC information indicates that the difference between the real-time SOC value and the SOC threshold is greater than a preset value, the current information indicates that there is a continuous charging current for charging the power battery, and the connection status indicates that the vehicle is not connected to an external charging device, it is determined that the start conditions of the overcharge warning mode are met.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the method described in any one of claims 1 to 7 are implemented.

9. An electronic device, characterized in that: include: a memory having a computer program stored thereon; A processor, configured to execute the computer program in the memory to implement the steps of the method according to any one of claims 1 to 7.

10. A vehicle, characterized in that: Comprising the electronic device as claimed in claim 9.

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