Method and device for preventing overcharge of power battery, vehicle, medium and program product

Abstract

The invention relates to the technical field of power battery control, in particular to a method and device for preventing overcharging of a power battery, a vehicle, a medium and a program product, and the method comprises the steps: obtaining the current charging capability of the power battery; judging whether the power battery meets a certain overshoot prevention condition or not according to the current charging capacity and the maximum charging capacity of the power battery; and if the power battery meets a certain overshoot prevention condition, at least one state parameter of the driving motor and the fuel cell system is obtained, an electric energy consumption strategy of the vehicle for preventing overcharge is matched in combination with the at least one state parameter, the current charging capacity and the maximum charging capacity, and the vehicle is controlled to execute the electric energy consumption strategy. According to the embodiment of the invention, the risk that the power battery approaches or reaches the overcharge state can be found in time by monitoring the current charging capacity and the maximum charging capacity of the power battery in real time, so that the service life is prolonged, and the safety of the vehicle is improved.

Description

Technical Field

[0001] The present application relates to the field of power battery control technology, and in particular to a method, device, vehicle, medium and program product for preventing power battery overcharging. Background Art

[0002] At present, the output power of the fuel cell vehicle stack rises and falls slowly. If the stack is running at high power, the power consumption of the drive motor will drop rapidly after the driver releases the accelerator. The power generation rate of the stack is much lower than the power drop rate of the drive motor. The excess energy will inevitably be charged into the power battery. When the available charging capacity of the power battery is relatively small, it will cause overcharging of the power battery, resulting in lithium deposition in the power battery, affecting the safety and service life of the power battery.

[0003] In the related technology, the available power and reserved power of the motor can be determined according to the status data of the power battery and the operating data of the vehicle, and the current target power can be obtained by using the above available power and reserved power, and then the motor can be controlled based on the current target power, thereby avoiding overcharging of the power battery; after determining that the power battery is at risk of overcharging or over-discharging, the output power of the PTC (Positive Temperature Coefficient) can be used to determine the compensation value of the PTC output power, and the output power of the power battery or the charging power of the power battery, and then the output power of the PTC can be adjusted to consume the excess output power of the range extender, thereby avoiding overcharging or over-discharging of the power battery.

[0004] However, in the related art, when the driver releases the accelerator, the drive motor still has driving power, causing unexpected acceleration. It is impossible to perfectly avoid battery overcharging and unexpected acceleration, and improvement is urgently needed. Summary of the invention

[0005] The present application provides a method, device, vehicle, medium and program product for preventing power battery overcharging, so as to solve the problem in the related art that when the driver releases the accelerator, the drive motor still has driving power, causing unexpected acceleration, and the battery overcharging and unexpected acceleration cannot be perfectly avoided.

[0006] The first aspect of the present application provides a method for preventing overcharging of a power battery, the method comprising the following steps: obtaining a current charging capacity of the power battery; judging whether the power battery meets a preset overcharge prevention condition based on the current charging capacity and the maximum charging capacity of the power battery; if the power battery meets the preset overcharge prevention condition, obtaining at least one state parameter of a drive motor and a fuel cell system, so as to match an energy consumption strategy of the vehicle for preventing overcharging in combination with the at least one state parameter, the current charging capacity and the maximum charging capacity, and controlling the vehicle to execute the energy consumption strategy.

[0007] Through the above technical solution, it is possible to determine whether the current charging capacity and the maximum charging capacity of the power battery meet certain overcharge prevention conditions, and when certain overcharge prevention conditions are met, the vehicle's energy consumption strategy for preventing overcharging is matched with at least one state parameter of the drive motor and the fuel cell system, the current charging capacity and the maximum charging capacity, and then executed. By real-time monitoring of the current charging capacity and the maximum charging capacity of the power battery, the risk of the power battery approaching or reaching an overcharge state is discovered in time, and the performance degradation of the battery due to long-term overcharging is avoided, thereby extending the service life, improving vehicle safety, improving energy utilization efficiency, and reducing unnecessary energy waste.

[0008] Optionally, in one embodiment of the present application, judging whether the power battery meets the preset overshoot prevention condition based on the current charging capacity and the maximum charging capacity of the power battery includes: obtaining the maximum charging capacity of the power battery; judging whether the difference between the current charging capacity and the maximum charging capacity is greater than a preset overshoot value; if the difference is greater than the preset overshoot value, judging that the power battery meets the preset overshoot prevention condition, and obtaining at least one state parameter of the drive motor and the fuel cell system; otherwise, judging that the power battery does not meet the preset overshoot prevention condition, and obtaining the charging capacity of the power battery at the next moment.

[0009] Through the above technical solution, when the difference is greater than a certain overcharge value, it can be determined that the power battery meets certain overcharge prevention conditions and the state parameters can be obtained. When the difference is not greater than a certain overcharge value, it can be determined that the power battery does not meet certain overcharge prevention conditions and the charging capacity at the next moment can be obtained. By directly comparing the difference between the current charging capacity and the maximum charging capacity with a certain overcharge value, it can be very accurately determined whether the battery is close to or has reached an overcharge state. The judgment is simpler and more accurate, and the overcharge of the power battery can be prevented more effectively, which can significantly reduce the safety risks caused by overcharging of the power battery.

[0010] Optionally, in one embodiment of the present application, if the power battery meets the preset overcharge prevention condition, at least one state parameter of the drive motor and the fuel cell system is obtained, so as to match the vehicle's energy consumption strategy for preventing overcharging in combination with the at least one state parameter, the current charging capacity and the maximum charging capacity, and control the vehicle to execute the energy consumption strategy, including: judging whether the difference is less than the maximum absorbed electric energy of the drive motor; if the difference is less than the maximum absorbed electric energy, determining the energy consumption strategy to be based on the current charging capacity and the maximum charging capacity Calculate the first target working efficiency of the drive motor, and use the first target working efficiency to control the drive motor to execute the energy consumption strategy, otherwise, judge whether the difference is less than the maximum absorbed electric energy of the drive motor and the the sum of the maximum absorbed electric energy of the fuel cell system; if the difference is less than the sum of the maximum absorbed electric energy of the drive motor and the maximum absorbed electric energy of the fuel cell system, then the electric energy consumption strategy is determined to be calculated based on the current charging capacity and the maximum charging capacity. The second target working efficiency is used to control the drive motor to execute the electric energy consumption strategy, and the third target working efficiency is used to control the fuel cell system to execute the electric energy consumption strategy; otherwise, the electric energy consumption strategy is determined to be calculated based on the current charging capacity and the maximum charging capacity. The fourth target working efficiency is used to control the fuel cell system to execute the electric energy consumption strategy.

[0011] Through the above technical scheme, when the difference is less than the maximum absorbed electric energy, the first target working efficiency of the drive motor can be calculated; when the difference is greater than the maximum absorbed electric energy but less than the sum of the maximum absorbed electric energy of the drive motor and the maximum absorbed electric energy of the fuel cell system, the second target working efficiency of the drive motor and the third target working efficiency of the fuel cell system can be calculated; when the difference is greater than the maximum absorbed electric energy of the drive motor and the sum of the maximum absorbed electric energy of the fuel cell system, the fourth target working efficiency of the fuel cell system can be calculated, and then the corresponding energy consumption strategy can be executed. The generated energy consumption strategy not only takes into account the charging state of the power battery, but also combines the energy absorption capacity of other key systems of the vehicle, thereby realizing the optimal distribution of electric energy, improving energy utilization efficiency, extending the service life of the power battery, and improving the health of the power battery.

[0012] Optionally, in one embodiment of the present application, controlling the vehicle to execute the power consumption strategy includes: determining whether the ambient temperature of the current environment of the power battery meets a preset temperature condition; if the ambient temperature does not meet the preset temperature condition, controlling the vehicle to execute the power consumption strategy until the ambient temperature meets the preset temperature condition.

[0013] Through the above technical solution, it is possible to judge in real time whether the ambient temperature of the power battery meets certain temperature conditions, and when the ambient temperature does not meet certain temperature conditions, the vehicle is controlled to execute the power consumption strategy until the ambient temperature meets certain temperature conditions, thereby avoiding the power battery from operating in a higher or lower temperature environment, affecting the working efficiency, charging speed and capacity of the power battery, etc., thereby improving the stability of the power battery and reducing performance fluctuations or failures caused by temperature fluctuations.

[0014] Optionally, in one embodiment of the present application, after controlling the vehicle to execute the electric energy consumption strategy, it also includes: storing the electric energy consumption strategy, the charging capacity of the power battery corresponding to the electric energy consumption strategy and the at least one state parameter as a set of historical data in a preset database; based on multiple sets of historical data in the preset database, generating corresponding optimization strategies for the power battery and / or the drive motor and the fuel cell system to optimize the power battery and / or the drive motor and the fuel cell system.

[0015] Through the above technical solution, the power consumption strategy, the charging capacity of the power battery corresponding to the power consumption strategy and at least one state parameter can be stored as a set of historical data in a certain database, and then the corresponding optimization strategy of the power battery, drive motor and / or fuel cell system can be generated based on the certain database, so as to identify the optimal power consumption strategy under different working conditions, guide actual operation, reduce unnecessary energy waste, improve energy utilization efficiency, extend battery life, and realize intelligent management.

[0016] A second aspect of the present application provides a device for preventing overcharging of a power battery, the device comprising: an acquisition module for acquiring a current charging capacity of the power battery; a judgment module for judging whether the power battery meets a preset overcharge prevention condition based on the current charging capacity and the maximum charging capacity of the power battery; a generation module for acquiring at least one state parameter of a drive motor and a fuel cell system when the power battery meets the preset overcharge prevention condition, so as to match an energy consumption strategy of the vehicle for preventing overcharging in combination with the at least one state parameter, the current charging capacity and the maximum charging capacity, and control the vehicle to execute the energy consumption strategy.

[0017] Through the above technical solution, it is possible to determine whether the current charging capacity and the maximum charging capacity of the power battery meet certain overcharge prevention conditions, and when certain overcharge prevention conditions are met, the vehicle's energy consumption strategy for preventing overcharging is matched with at least one state parameter of the drive motor and the fuel cell system, the current charging capacity and the maximum charging capacity, and then executed. By real-time monitoring of the current charging capacity and the maximum charging capacity of the power battery, the risk of the power battery approaching or reaching an overcharge state is discovered in time, and the performance degradation of the battery due to long-term overcharging is avoided, thereby extending the service life, improving vehicle safety, improving energy utilization efficiency, and reducing unnecessary energy waste.

[0018] Optionally, in one embodiment of the present application, the judgment module includes: an acquisition unit, used to acquire the maximum charging capacity of the power battery; a first judgment unit, used to judge whether the difference between the current charging capacity and the maximum charging capacity is greater than a preset overshoot value; a generation unit, used to determine that the power battery meets the preset overshoot prevention condition if the difference is greater than the preset overshoot value, and obtain at least one state parameter of the drive motor and the fuel cell system; otherwise, determine that the power battery does not meet the preset overshoot prevention condition, and obtain the charging capacity of the power battery at the next moment.

[0019] Through the above technical solution, when the difference is greater than a certain overcharge value, it can be determined that the power battery meets certain overcharge prevention conditions and the state parameters can be obtained. When the difference is not greater than a certain overcharge value, it can be determined that the power battery does not meet certain overcharge prevention conditions and the charging capacity at the next moment can be obtained. By directly comparing the difference between the current charging capacity and the maximum charging capacity with a certain overcharge value, it can be very accurately determined whether the battery is close to or has reached an overcharge state. The judgment is simpler and more accurate, and the overcharge of the power battery can be prevented more effectively, which can significantly reduce the safety risks caused by overcharging of the power battery.

[0020] Optionally, in one embodiment of the present application, the generating module includes: a second judging unit, used to judge whether the difference is less than the maximum absorbed electric energy of the driving motor; a first determining unit, used to determine, when the difference is less than the maximum absorbed electric energy, that the electric energy consumption strategy is to calculate the first target working efficiency of the driving motor based on the current charging capacity and the maximum charging capacity, and use the first target working efficiency to control the driving motor to execute the electric energy consumption strategy; otherwise, judging whether the difference is less than the sum of the maximum absorbed electric energy of the driving motor and the maximum absorbed electric energy of the fuel cell system; a second determining unit, used to determine, when the difference is less than the maximum absorbed electric energy of the driving motor and the maximum absorbed electric energy of the fuel cell system, When the sum of the maximum absorbed electric energy of the fuel cell system is reached, the electric energy consumption strategy is determined to be calculated based on the current charging capacity and the maximum charging capacity as the second target operating efficiency of the drive motor and the third target operating efficiency of the fuel cell system, and the second target operating efficiency is used to control the drive motor to execute the electric energy consumption strategy, and the third target operating efficiency is used to control the fuel cell system to execute the electric energy consumption strategy; otherwise, the electric energy consumption strategy is determined to be calculated based on the current charging capacity and the maximum charging capacity as the fourth target operating efficiency, and the fourth target operating efficiency is used to control the fuel cell system to execute the electric energy consumption strategy.

[0021] Through the above technical scheme, when the difference is less than the maximum absorbed electric energy, the first target working efficiency of the drive motor can be calculated; when the difference is greater than the maximum absorbed electric energy but less than the sum of the maximum absorbed electric energy of the drive motor and the maximum absorbed electric energy of the fuel cell system, the second target working efficiency of the drive motor and the third target working efficiency of the fuel cell system can be calculated; when the difference is greater than the maximum absorbed electric energy of the drive motor and the sum of the maximum absorbed electric energy of the fuel cell system, the fourth target working efficiency of the fuel cell system can be calculated, and then the corresponding energy consumption strategy can be executed. The generated energy consumption strategy not only takes into account the charging state of the power battery, but also combines the energy absorption capacity of other key systems of the vehicle, thereby realizing the optimal distribution of electric energy, improving energy utilization efficiency, extending the service life of the power battery, and improving the health of the power battery.

[0022] Optionally, in one embodiment of the present application, the generation module includes: a third judgment unit, used to judge whether the ambient temperature of the current environment of the power battery meets the preset temperature condition; a control unit, used to control the vehicle to execute the power consumption strategy when the ambient temperature does not meet the preset temperature condition until the ambient temperature meets the preset temperature condition.

[0023] Through the above technical solution, it is possible to judge in real time whether the ambient temperature of the power battery meets certain temperature conditions, and when the ambient temperature does not meet certain temperature conditions, the vehicle is controlled to execute the power consumption strategy until the ambient temperature meets certain temperature conditions, thereby avoiding the power battery from operating in a higher or lower temperature environment, affecting the working efficiency, charging speed and capacity of the power battery, etc., thereby improving the stability of the power battery and reducing performance fluctuations or failures caused by temperature fluctuations.

[0024] Optionally, in one embodiment of the present application, it also includes: a storage module, which is used to store the power consumption strategy, the charging capacity of the power battery corresponding to the power consumption strategy and the at least one state parameter as a set of historical data in a preset database after controlling the vehicle to execute the power consumption strategy; an optimization module, which is used to generate corresponding optimization strategies for the power battery and / or the drive motor and the fuel cell system based on multiple sets of historical data in the preset database, so as to optimize the power battery and / or the drive motor and the fuel cell system.

[0025] Through the above technical solution, the power consumption strategy, the charging capacity of the power battery corresponding to the power consumption strategy and at least one state parameter can be stored as a set of historical data in a certain database, and then the corresponding optimization strategy of the power battery, drive motor and / or fuel cell system can be generated based on the certain database, so as to identify the optimal power consumption strategy under different working conditions, guide actual operation, reduce unnecessary energy waste, improve energy utilization efficiency, extend battery life, and realize intelligent management.

[0026] A third aspect of the present application provides a vehicle, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the method for preventing power battery overcharging as described in the above embodiment.

[0027] A fourth aspect of the present application provides a computer-readable storage medium, which stores a computer program that, when executed by a processor, implements the above method for preventing overcharging of a power battery.

[0028] A fifth aspect of the present application provides a computer program product, including a computer program, which implements the above method for preventing power battery overcharging when executed.

[0029] The embodiment of the present application can determine whether the current charging capacity and maximum charging capacity of the power battery meet certain overcharge prevention conditions, and when certain overcharge prevention conditions are met, the power consumption strategy of the vehicle for preventing overcharge is matched and executed in combination with at least one state parameter of the drive motor and the fuel cell system, the current charging capacity and the maximum charging capacity. By real-time monitoring of the current charging capacity and the maximum charging capacity of the power battery, the risk of the power battery approaching or reaching an overcharge state is promptly discovered, and the performance degradation of the battery due to long-term overcharge is avoided, thereby extending the service life, improving vehicle safety, improving energy utilization efficiency, and reducing unnecessary energy waste. Thus, the technical problems in the related art that the drive motor still has driving power when the driver releases the accelerator, causing unexpected acceleration, and the inability to perfectly avoid battery overcharge and unexpected acceleration are solved.

[0030] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0032] Figure 1 A block diagram of a power battery system provided according to an embodiment of the present application;

[0033] Figure 2 A flowchart of a method for preventing overcharging of a power battery provided according to an embodiment of the present application;

[0034] Figure 3 A flowchart of controlling a vehicle to execute an electric energy consumption strategy according to an embodiment of the present application;

[0035] Figure 4 A block diagram of a device for preventing power battery overcharging provided according to an embodiment of the present application;

[0036] Figure 5 It is a schematic diagram of the structure of a vehicle provided according to an embodiment of the present application.

[0037] Reference numerals:

[0038] Among them, 100-vehicle controller, 101-hydrogen cylinder, 102-fuel cell control system, 103-fuel cell system, 104-DC / DC (Direct Current to Direct Current Converter), 105-battery management system, 106-power battery, 107-motor controller, 108-inverter, 109-drive motor; 40-device for preventing power battery overcharging; 401-acquisition module, 402 judgment module, 403-generation module; 501-memory, 502-processor, 503-communication interface. DETAILED DESCRIPTION

[0039] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0040] The following describes the method, device, vehicle, medium and program product for preventing power battery overcharge in the embodiment of the present application with reference to the accompanying drawings. In view of the problem mentioned in the above background technology that when the driver releases the accelerator, the drive motor still has driving power, causing unexpected acceleration, and cannot perfectly avoid battery overcharge and unexpected acceleration, the embodiment of the present application provides a method for preventing power battery overcharge, in which it can be judged whether the current charging capacity and maximum charging capacity of the power battery meet certain overcharge prevention conditions, and when certain overcharge prevention conditions are met, the power consumption strategy of the vehicle for preventing overcharge is matched with at least one state parameter, current charging capacity and maximum charging capacity of the drive motor and the fuel cell system, and executed, and the current charging capacity and maximum charging capacity of the power battery are monitored in real time, and the risk of the power battery approaching or reaching the overcharge state is timely discovered, and the performance degradation of the battery due to long-term overcharge is avoided, thereby extending the service life, improving vehicle safety, improving energy utilization efficiency, and reducing unnecessary energy waste. Thus, the technical problems such as the drive motor still having driving power and causing unexpected acceleration when the driver releases the accelerator in the related technology are solved, and the technical problems such as the overcharge and unexpected acceleration of the battery cannot be perfectly avoided are solved.

[0041] Before explaining the method for preventing power battery overcharging proposed in the embodiment of the present application, the power battery system provided in the embodiment of the present application is first introduced.

[0042] Specifically, Figure 1 The present invention is a block diagram of a power battery system provided according to one embodiment of the present application.

[0043] like Figure 1 As shown, 100 is the vehicle controller, 101 is the hydrogen cylinder, 102 is the fuel cell control system, 103 is the fuel cell system, 104 is the DC / DC, 105 is the battery management system, 106 is the power battery, 107 is the motor controller, 108 is the inverter, and 109 is the drive motor.

[0044] Specifically, the vehicle controller 100 collects the maximum charging capacity and current charging capacity of the power battery 106 reported by the battery management system 105 through CAN (Controller Area Network), and then the fuel cell system 103 generates electricity through the redox reaction of hydrogen and oxygen in the hydrogen bottle 101. The generated electricity is converted by DC / DC 104 and inverter 108, and then directly transmitted to the drive motor 109 or the power battery 106 for driving or charging. The drive motor 109 can obtain electrical energy from the power battery 106 or the fuel cell system 103, and the drive motor 109 and the fuel cell system 103 reduction mechanism are engaged through gears.

[0045] Specifically, Figure 2 The present invention is a flowchart of a method for preventing overcharging of a power battery provided according to an embodiment of the present application.

[0046] like Figure 2 As shown, the method for preventing power battery overcharging includes the following steps:

[0047] In step S201 , the current charging capacity of the power battery is obtained.

[0048] It is understandable that the current charging capacity of the power battery in the embodiment of the present application may be affected by battery materials, charging facilities, vehicle design and charging technology, which can be manifested as follows: in terms of battery materials, for example, lithium iron phosphate batteries have higher safety and stability, but their energy density is relatively low, which limits the charging speed to a certain extent; in terms of charging facilities, for example, if the charging facilities cannot meet the fast charging requirements of the power battery, then it will affect its charging speed; in terms of vehicle design, for example, the layout of the battery pack, the design of the heat dissipation system, etc. will affect the charging speed and safety of the battery; in terms of charging technology, for example, there may be battery products with higher charging rates and shorter charging times.

[0049] As a possible implementation method, the embodiment of the present application can obtain the current power capacity of the power battery in real time. The acquisition method may include but is not limited to the official website address, technical specifications, battery management system, professional charging test equipment, etc., which can be set by technicians in this field according to actual conditions, and this application does not make specific restrictions.

[0050] For example, Figure 1 As shown, the embodiment of the present application can utilize CAN to obtain the current charging capacity of the power battery reported by the battery management system in real time through the vehicle controller.

[0051] In step S202 , it is determined whether the power battery meets a preset overcharge prevention condition according to the current charging capacity and the maximum charging capacity of the power battery.

[0052] It should be noted that the maximum charging capacity of the embodiment of the present application can be understood as the maximum charging power or current that the power battery can safely accept under specific conditions (such as temperature, battery health status, etc.). It is a comprehensive indicator that is affected by multiple factors such as battery type, technology, materials, thermal management, and battery management system.

[0053] In addition, the maximum charging capacity of the embodiment of the present application can be obtained by those skilled in the art according to actual conditions, and this application does not impose any specific restrictions. Figure 1 As shown, the embodiment of the present application can utilize CAN to obtain the maximum charging capacity of the power battery reported by the battery management system in real time through the vehicle controller.

[0054] In the actual implementation process, the embodiment of the present application can determine whether the power battery meets certain overcharge prevention conditions according to the current charging capacity and the maximum charging capacity of the power battery, and then perform corresponding operations. Among them, the certain overcharge prevention conditions can be set by technicians in this field according to actual conditions, and this application does not make specific restrictions.

[0055] Optionally, in one embodiment of the present application, whether the power battery meets the preset overcharge prevention condition is judged according to the current charging capacity and the maximum charging capacity of the power battery, including: obtaining the maximum charging capacity of the power battery; judging whether the difference between the current charging capacity and the maximum charging capacity is greater than a preset overcharge value; if the difference is greater than the preset overcharge value, it is judged that the power battery meets the preset overcharge prevention condition, and at least one state parameter of the drive motor and the fuel cell system is obtained, otherwise, it is judged that the power battery does not meet the preset overcharge prevention condition, and the charging capacity of the power battery at the next moment is obtained.

[0056] In some embodiments, the embodiment of the present application can determine whether the power battery meets the preset overcharge prevention condition based on the difference between the current charging capacity and the maximum charging capacity. For example, in the embodiment of the present application, if the difference is greater than a certain overcharge value, it is determined that the power battery meets the certain overcharge prevention condition, and at least one state parameter of the drive motor and the fuel cell system is obtained. Otherwise, it is determined that the power battery does not meet the certain overcharge prevention condition, and the charging capacity of the power battery at the next moment is obtained. Among them, the certain overcharge value can be set by a person skilled in the art according to actual conditions, and this application does not make specific restrictions.

[0057] For example, in the embodiment of the present application, if the current charging capacity of the power battery minus the maximum charging capacity is greater than -3kw, it is determined that the power battery meets certain overcharge prevention conditions, indicating that the power battery has an overcharge risk, and at least one state parameter of the drive motor and the fuel cell system is obtained, thereby appropriately reducing the working efficiency of the high-voltage components.

[0058] In addition, in the embodiment of the present application, if the current charging capacity of the battery minus the maximum charging capacity is less than or equal to -3kw, it is determined that the power battery does not meet certain overcharge prevention conditions, indicating that there is no overcharge risk for the power battery, and the charging capacity of the power battery at the next moment is obtained to determine in real time whether there is an overcharge risk for the power battery.

[0059] In step S203, if the power battery meets the preset overcharge prevention condition, at least one state parameter of the drive motor and the fuel cell system is obtained to match the vehicle's energy consumption strategy for preventing overcharging in combination with at least one state parameter, the current charging capacity and the maximum charging capacity, and the vehicle is controlled to execute the energy consumption strategy.

[0060] It can be understood that whether the power battery in the embodiment of the present application is overcharged plays an important role in the working efficiency of the drive motor and the fuel cell system. Therefore, when the power battery meets certain overcharge prevention conditions, the embodiment of the present application obtains the state parameters of the drive motor and the fuel cell system in real time, which may include but are not limited to voltage, current, temperature, power, etc., which can be specifically set by technicians in this field according to actual conditions, and this application does not impose specific restrictions.

[0061] It will be understood by those skilled in the art that, in the embodiment of the present application, when the power battery meets certain overcharging prevention conditions, the corresponding power consumption strategy can be matched in real time for the vehicle with overcharging according to the current charging capacity and maximum charging capacity of the power battery and at least one state parameter of the drive motor and the fuel cell system, and the power consumption strategy can be executed to control the overcharging of the power battery. The power consumption strategy will be described in detail below and will not be elaborated here.

[0062] Optionally, in one embodiment of the present application, if the power battery meets a preset overcharge prevention condition, at least one state parameter of the drive motor and the fuel cell system is obtained to match the vehicle's energy consumption strategy for preventing overcharging in combination with at least one state parameter, the current charging capacity and the maximum charging capacity, and control the vehicle to execute the energy consumption strategy, including: judging whether the difference is less than the maximum absorbed electric energy of the drive motor; if the difference is less than the maximum absorbed electric energy, determining the energy consumption strategy to calculate the first target working efficiency of the drive motor based on the current charging capacity and the maximum charging capacity, and using the first target working efficiency to control the drive motor to execute the energy consumption strategy; otherwise, judging whether the difference is less than the maximum absorbed electric energy of the drive motor energy and the maximum absorbed electric energy of the fuel cell system; if the difference is less than the sum of the maximum absorbed electric energy of the drive motor and the maximum absorbed electric energy of the fuel cell system, the electric energy consumption strategy is determined to be based on the current charging capacity and the maximum charging capacity to calculate the second target working efficiency of the drive motor and the third target working efficiency of the fuel cell system, and the second target working efficiency is used to control the drive motor to execute the electric energy consumption strategy, and the third target working efficiency is used to control the fuel cell system to execute the electric energy consumption strategy; otherwise, the electric energy consumption strategy is determined to be based on the current charging capacity and the maximum charging capacity to calculate the fourth target working efficiency of the fuel cell system, and the fourth target working efficiency is used to control the fuel cell system to execute the electric energy consumption strategy.

[0063] During the actual implementation process, when the difference between the current charging capacity and the maximum charging capacity of the power battery is greater than a certain overshoot value, the embodiment of the present application determines whether the difference is less than the maximum absorbed electric energy of the drive motor. If the difference is less than the maximum absorbed electric energy, the electric energy consumption strategy is determined to be a first target working efficiency of the drive motor calculated based on the current charging capacity and the maximum charging capacity, and the first target working efficiency is used to control the drive motor to execute the electric energy consumption strategy.

[0064] If the difference is greater than or equal to the maximum electric energy absorbed by the drive motor, determine whether the difference is less than the sum of the maximum electric energy absorbed by the drive motor and the maximum electric energy absorbed by the fuel cell system. If the difference is less than the sum of the maximum electric energy absorbed by the drive motor and the maximum electric energy absorbed by the fuel cell system, determine the electric energy consumption strategy to calculate the second target working efficiency of the drive motor and the third target working efficiency of the fuel cell system based on the current charging capacity and the maximum charging capacity, and use the second target working efficiency to control the drive motor to execute the electric energy consumption strategy, and use the third target working efficiency to control the fuel cell system to execute the electric energy consumption strategy.

[0065] If the difference is greater than or equal to the sum of the maximum absorbed electric energy of the drive motor and the maximum absorbed electric energy of the fuel cell system, the electric energy consumption strategy is determined to use the current charging capacity and the maximum charging capacity to calculate the fourth target working efficiency of the fuel cell system, and use the fourth target working efficiency to control the fuel cell system to execute the electric energy consumption strategy.

[0066] Among them, the first target work efficiency, the second target work efficiency, the third target work efficiency, and the fourth target work efficiency can be set by technical personnel in this field according to actual conditions, and this application does not make any specific restrictions.

[0067] For example, Figure 3 As shown, the process of controlling the vehicle to execute the electric energy consumption strategy in the embodiment of the present application can be:

[0068] Step S301: Obtain the maximum charging capacity and current charging capacity of the power battery.

[0069] Step S302: The vehicle controller determines whether the difference between the current charging capacity and the maximum charging capacity of the power battery is greater than -3kw. If so, execute step S304; otherwise, execute step S303.

[0070] Step S303: There is no need to execute the power consumption strategy for the high voltage components.

[0071] Step S304: The vehicle controller determines whether the difference between the current charging capacity and the maximum charging capacity of the power battery is less than the maximum absorbed electric energy of the drive motor. If so, execute step S305; otherwise, execute step S306.

[0072] It can be understood that, in the embodiment of the present application, when the efficiency reduction flag is sent to the motor controller, the motor controller still responds to the torque request of the vehicle controller. After receiving the efficiency reduction flag, the motor controller calculates the current minimum efficiency that can be achieved and feeds it back to the vehicle controller. The vehicle controller calculates the maximum electric energy E1 that can be absorbed by the drive motor based on its minimum efficiency.

[0073] Step S305: using the first target working efficiency to control the drive motor to execute the power consumption strategy.

[0074] It can be understood that when the current charging capacity-maximum charging capacity of the embodiment of the present application is greater than -3kw and less than E1, the driving motor absorbs excess electric energy.

[0075] Step S306: The vehicle controller determines whether the difference between the current charging capacity and the maximum charging capacity of the power battery is less than the sum of the maximum absorbed electric energy of the drive motor and the maximum absorbed electric energy of the fuel cell system. If so, execute step S307; otherwise, execute step S308.

[0076] Step S307: using the second target working efficiency to control the drive motor to execute the power consumption strategy, and using the third target working efficiency to control the fuel cell system to execute the power consumption strategy.

[0077] It can be understood that, in the embodiment of the present application, when the current charging capacity minus the maximum charging capacity is greater than E1 and less than E1+E2, the excess electric energy is absorbed by the drive motor and the high-voltage components inside the fuel cell system.

[0078] Step S308: The vehicle controller determines whether the difference between the current charging capacity and the maximum charging capacity of the power battery is greater than the sum of the maximum absorbed electric energy of the drive motor and the maximum absorbed electric energy of the fuel cell system. If so, execute step S309; ​​otherwise, execute step S307.

[0079] Step S309: using the fourth target working efficiency to control the fuel cell system to execute the power consumption strategy.

[0080] It can be understood that when the current charging capacity minus the maximum charging capacity is greater than E1+E2 in the embodiment of the present application, the power of the fuel cell system is limited to no more than the battery charging capacity E1+E2 to prevent overcharging of the power battery.

[0081] It can be seen from this that in the embodiment of the present application, when the current charging capacity - the maximum charging capacity is greater than -3kw and less than E1, the excess electric energy is absorbed by the drive motor; when the current charging capacity - the maximum charging capacity is greater than E1 and less than E1+E2, the excess electric energy is absorbed by the drive motor and the high-voltage components inside the fuel cell; when the current charging capacity - the maximum charging capacity is greater than E1+E2, the power of the fuel cell system is limited to no more than the battery charging capacity E1+E2 to prevent overcharging of the power battery.

[0082] Optionally, in one embodiment of the present application, controlling the vehicle to execute an energy consumption strategy includes: determining whether the ambient temperature of the current environment of the power battery meets a preset temperature condition; if the ambient temperature does not meet the preset temperature condition, controlling the vehicle to execute the energy consumption strategy until the ambient temperature meets the preset temperature condition.

[0083] In the actual implementation process, the embodiment of the present application also includes: judging whether the ambient temperature of the current environment of the power battery meets a certain temperature condition, and if the ambient temperature does not meet the certain temperature condition, controlling the vehicle to execute the energy consumption strategy until the ambient temperature meets the certain temperature condition. The certain temperature condition can be set by a person skilled in the art according to the actual situation, and this application does not make any specific restrictions.

[0084] For example, the reduced efficiency of the drive motor and fuel cell system in the embodiment of the present application can be dissipated in the form of heat energy. When the ambient temperature of the current environment in which the power battery is located is low and does not meet certain temperature conditions, heat can be provided for the thermal management system and the heating system; when the ambient temperature is high and does not meet certain temperature conditions, the fan, water pump and other components of the thermal management system can be operated at high power to consume electrical energy.

[0085] Optionally, in one embodiment of the present application, after controlling the vehicle to execute the electric energy consumption strategy, it also includes: storing the electric energy consumption strategy, the charging capacity of the power battery corresponding to the electric energy consumption strategy, and at least one state parameter as a set of historical data in a preset database; based on multiple sets of historical data in the preset database, generating corresponding optimization strategies for the power battery and / or drive motor and fuel cell system to optimize the power battery and / or drive motor and fuel cell system.

[0086] As a possible implementation method, after controlling the vehicle to execute the power consumption strategy, the embodiment of the present application can store the power consumption strategy, the charging capacity of the power battery corresponding to the power consumption strategy, and at least one state parameter as a set of historical data in a certain database, thereby generating a corresponding optimization strategy for the power battery and / or drive motor and fuel cell system, and optimizing the power battery and / or drive motor and fuel cell system. Among them, the certain database can be set by a person skilled in the art according to actual conditions, and this application does not impose specific restrictions.

[0087] That is to say, the embodiment of the present application can generate an energy consumption strategy under different vehicle driving conditions (such as city driving, high-speed driving, acceleration, deceleration, etc., which are not specifically limited in this application), including the current charging capacity of the power battery, the maximum charging capacity, the state parameters of the drive motor, the state parameters of the fuel cell system, etc., and store them in a certain database for subsequent analysis.

[0088] Furthermore, in an embodiment of the present application, when the power battery meets certain overcharge prevention conditions, a corresponding optimization strategy can be generated based on multiple sets of historical data in a certain database to optimize the power battery, drive motor and / or fuel cell system.

[0089] Combine the following Figure 3 , the working principle of the method for preventing power battery overcharging proposed in the embodiment of the present application is introduced in detail with a specific embodiment.

[0090] in, Figure 3 A flowchart of controlling a vehicle to execute an electric energy consumption strategy according to an embodiment of the present application.

[0091] Step S301: Obtain the maximum charging capacity and current charging capacity of the power battery.

[0092] Step S302: The vehicle controller determines whether the difference between the current charging capacity and the maximum charging capacity of the power battery is greater than -3kw. If so, execute step S304; otherwise, execute step S303.

[0093] Step S303: There is no need to execute the power consumption strategy for the high voltage components.

[0094] Step S304: The vehicle controller determines whether the difference between the current charging capacity and the maximum charging capacity of the power battery is less than the maximum absorbed electric energy of the drive motor. If so, execute step S305; otherwise, execute step S306.

[0095] Step S305: using the first target working efficiency to control the drive motor to execute the power consumption strategy.

[0096] Step S306: The vehicle controller determines whether the difference between the current charging capacity and the maximum charging capacity of the power battery is less than the sum of the maximum absorbed electric energy of the drive motor and the maximum absorbed electric energy of the fuel cell system. If so, execute step S307; otherwise, execute step S308.

[0097] Step S307: using the second target working efficiency to control the drive motor to execute the power consumption strategy, and using the third target working efficiency to control the fuel cell system to execute the power consumption strategy.

[0098] Step S308: The vehicle controller determines whether the difference between the current charging capacity and the maximum charging capacity of the power battery is greater than the sum of the maximum absorbed electric energy of the drive motor and the maximum absorbed electric energy of the fuel cell system. If so, execute step S309; ​​otherwise, execute step S307.

[0099] Step S309: using the fourth target working efficiency to control the fuel cell system to execute the power consumption strategy.

[0100] It can be seen from this that in the embodiment of the present application, when the current charging capacity - the maximum charging capacity is greater than -3kw and less than E1, the excess electric energy is absorbed by the drive motor; when the current charging capacity - the maximum charging capacity is greater than E1 and less than E1+E2, the excess electric energy is absorbed by the drive motor and the high-voltage components inside the fuel cell; when the current charging capacity - the maximum charging capacity is greater than E1+E2, the power of the fuel cell system is limited to no more than the battery charging capacity + E1+E2 to prevent overcharging of the power battery.

[0101] According to the method for preventing power battery overcharge proposed in the embodiment of the present application, it is possible to determine whether the current charging capacity and maximum charging capacity of the power battery meet certain overcharge prevention conditions, and when certain overcharge prevention conditions are met, the power consumption strategy of the vehicle for preventing overcharge is matched and executed in combination with at least one state parameter of the drive motor and the fuel cell system, the current charging capacity and the maximum charging capacity. By real-time monitoring of the current charging capacity and the maximum charging capacity of the power battery, the risk of the power battery approaching or reaching the overcharge state is promptly discovered, and the performance degradation of the battery due to long-term overcharge is avoided, thereby extending the service life, improving vehicle safety, improving energy utilization efficiency, and reducing unnecessary energy waste. Thus, the technical problems in the related art that when the driver releases the accelerator, the drive motor still has driving power, causing unexpected acceleration, and cannot perfectly avoid battery overcharge and unexpected acceleration are solved.

[0102] Next, a device for preventing power battery overcharging proposed in an embodiment of the present application will be described with reference to the accompanying drawings.

[0103] Figure 4 A block diagram of a device for preventing power battery overcharging provided according to an embodiment of the present application.

[0104] like Figure 4 As shown, the device 40 for preventing power battery overcharging includes: an acquisition module 401 , a judgment module 402 and a generation module 403 .

[0105] The acquisition module 401 is used to acquire the current charging capacity of the power battery.

[0106] The judgment module 402 is used to judge whether the power battery meets the preset overcharge prevention condition according to the current charging capacity and the maximum charging capacity of the power battery.

[0107] The generation module 403 is used to obtain at least one state parameter of the drive motor and the fuel cell system when the power battery meets the preset overcharge prevention condition, so as to match the vehicle's power consumption strategy for preventing overcharging in combination with at least one state parameter, the current charging capacity and the maximum charging capacity, and control the vehicle to execute the power consumption strategy.

[0108] Optionally, in one embodiment of the present application, the judgment module 402 includes: an acquisition unit, a first judgment unit and a generation unit.

[0109] The acquisition unit is used to acquire the maximum charging capacity of the power battery.

[0110] The first judging unit is used to judge whether the difference between the current charging capacity and the maximum charging capacity is greater than a preset overshoot value.

[0111] A generating unit is used to determine that the power battery meets the preset overshoot prevention condition if the difference is greater than the preset overshoot value, and obtain at least one state parameter of the drive motor and the fuel cell system; otherwise, determine that the power battery does not meet the preset overshoot prevention condition, and obtain the charging capacity of the power battery at the next moment.

[0112] Optionally, in an embodiment of the present application, the generation module 403 includes: a second judgment unit, a first determination unit and a second determination unit.

[0113] The second judgment unit is used to judge whether the difference is less than the maximum absorbed electric energy of the driving motor.

[0114] The first determination unit is used to determine the energy consumption strategy to be a first target working efficiency of the drive motor calculated based on the current charging capacity and the maximum charging capacity when the difference is less than the maximum absorbed electric energy, and use the first target working efficiency to control the drive motor to execute the energy consumption strategy; otherwise, determine whether the difference is less than the sum of the maximum absorbed electric energy of the drive motor and the maximum absorbed electric energy of the fuel cell system.

[0115] The second determination unit is used to determine the energy consumption strategy to be to calculate the second target working efficiency of the drive motor and the third target working efficiency of the fuel cell system based on the current charging capacity and the maximum charging capacity when the difference is less than the sum of the maximum absorbed electric energy of the drive motor and the maximum absorbed electric energy of the fuel cell system, and to use the second target working efficiency to control the drive motor to execute the energy consumption strategy, and to use the third target working efficiency to control the fuel cell system to execute the energy consumption strategy, otherwise, determine the energy consumption strategy to be to calculate the fourth target working efficiency of the fuel cell system using the current charging capacity and the maximum charging capacity, and use the fourth target working efficiency to control the fuel cell system to execute the energy consumption strategy.

[0116] Optionally, in one embodiment of the present application, the generation module 403 includes: a third judgment unit and a control unit.

[0117] The third judgment unit is used to judge whether the ambient temperature of the current environment of the power battery meets the preset temperature condition.

[0118] The control unit is used to control the vehicle to execute an electric energy consumption strategy when the ambient temperature does not meet the preset temperature condition until the ambient temperature meets the preset temperature condition.

[0119] Optionally, in one embodiment of the present application, it also includes: a storage module and an optimization module.

[0120] Among them, the storage module is used to store the power consumption strategy, the charging capacity of the power battery corresponding to the power consumption strategy and at least one state parameter as a set of historical data in a preset database after controlling the vehicle to execute the power consumption strategy.

[0121] The optimization module is used to generate corresponding optimization strategies for the power battery and / or drive motor and fuel cell system based on multiple groups of historical data in a preset database to optimize the power battery and / or drive motor and fuel cell system.

[0122] It should be noted that the aforementioned explanation of the embodiment of the method for preventing overcharging of a power battery is also applicable to the device for preventing overcharging of a power battery in this embodiment, and will not be repeated here.

[0123] According to the device for preventing power battery overcharge proposed in the embodiment of the present application, it is possible to determine whether the current charging capacity and maximum charging capacity of the power battery meet certain overcharge prevention conditions, and when certain overcharge prevention conditions are met, the power consumption strategy of the vehicle for preventing overcharge is matched and executed in combination with at least one state parameter of the drive motor and the fuel cell system, the current charging capacity and the maximum charging capacity. By real-time monitoring of the current charging capacity and the maximum charging capacity of the power battery, the risk of the power battery approaching or reaching the overcharge state is promptly discovered, and the performance degradation of the battery due to long-term overcharge is avoided, thereby extending the service life, improving vehicle safety, improving energy utilization efficiency, and reducing unnecessary energy waste. Thus, the technical problems in the related art that when the driver releases the accelerator, the drive motor still has driving power, causing unexpected acceleration, and cannot perfectly avoid battery overcharge and unexpected acceleration are solved.

[0124] Figure 5 This is a schematic diagram of the structure of a vehicle provided according to an embodiment of the present application. The vehicle may include:

[0125] A memory 501 , a processor 502 , and a computer program stored in the memory 501 and executable on the processor 502 .

[0126] When the processor 502 executes the program, the method for preventing power battery overcharging provided in the above embodiment is implemented.

[0127] Furthermore, the vehicle also includes:

[0128] The communication interface 503 is used for communication between the memory 501 and the processor 502 .

[0129] The memory 501 is used to store computer programs that can be executed on the processor 502 .

[0130] The memory 501 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

[0131] If the memory 501, the processor 502 and the communication interface 503 are implemented independently, the communication interface 503, the memory 501 and the processor 502 can be connected to each other through a bus and communicate with each other. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 5 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0132] Optionally, in a specific implementation, if the memory 501, the processor 502 and the communication interface 503 are integrated on a chip, the memory 501, the processor 502 and the communication interface 503 can communicate with each other through an internal interface.

[0133] The processor 502 may be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application.

[0134] An embodiment of the present application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the above method for preventing power battery overcharging.

[0135] An embodiment of the present application also provides a computer program product, including a computer program, which implements the above method for preventing power battery overcharging when executed.

[0136] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0137] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0138] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or N executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0139] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purpose of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or N wirings (electronic devices), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways as necessary and then storing it in a computer memory.

[0140] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above embodiment, the N steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. If implemented by hardware, as in another embodiment, it can be implemented by any one or a combination of multiple of the following technologies known in the art: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0141] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0142] In addition, each functional unit in each embodiment of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0143] The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application. A person of ordinary skill in the art may change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A method for preventing power battery overcharging, It is characterized in that The following steps are involved: Get the current charging capacity of the power battery; Determining whether the power battery meets a preset overcharge prevention condition according to the current charging capacity and the maximum charging capacity of the power battery; If the power battery meets the preset overcharge prevention condition, at least one state parameter of the drive motor and the fuel cell system is obtained to match the vehicle's energy consumption strategy for preventing overcharging in combination with the at least one state parameter, the current charging capacity and the maximum charging capacity, and the vehicle is controlled to execute the energy consumption strategy.

2. The method according to claim 1, It is characterized in that The determining whether the power battery meets a preset overcharge prevention condition according to the current charging capacity and the maximum charging capacity of the power battery includes: Obtaining the maximum charging capacity of the power battery; Determining whether a difference between the current charging capacity and the maximum charging capacity is greater than a preset overshoot value; If the difference is greater than the preset overshoot value, it is determined that the power battery meets the preset overshoot prevention condition, and at least one state parameter of the drive motor and the fuel cell system is obtained; otherwise, it is determined that the power battery does not meet the preset overshoot prevention condition, and the charging capacity of the power battery at the next moment is obtained.

3. The method according to claim 2, It is characterized in that If the power battery satisfies the preset overcharge prevention condition, at least one state parameter of the drive motor and the fuel cell system is obtained, so as to match the electric energy consumption strategy of the vehicle for preventing overcharge in combination with the at least one state parameter, the current charging capacity and the maximum charging capacity, and control the vehicle to execute the electric energy consumption strategy, including: Determining whether the difference is less than the maximum absorbed electric energy of the drive motor; If the difference is less than the maximum absorbed electric energy, determining that the electric energy consumption strategy is to calculate the first target working efficiency of the drive motor based on the current charging capacity and the maximum charging capacity, and using the first target working efficiency to control the drive motor to execute the electric energy consumption strategy, otherwise, determining whether the difference is less than the sum of the maximum absorbed electric energy of the drive motor and the maximum absorbed electric energy of the fuel cell system; If the difference is less than the sum of the maximum absorbed electric energy of the drive motor and the maximum absorbed electric energy of the fuel cell system, the electric energy consumption strategy is determined to be to calculate the second target operating efficiency of the drive motor and the third target operating efficiency of the fuel cell system based on the current charging capacity and the maximum charging capacity, and the second target operating efficiency is used to control the drive motor to execute the electric energy consumption strategy, and the third target operating efficiency is used to control the fuel cell system to execute the electric energy consumption strategy; otherwise, the electric energy consumption strategy is determined to be to calculate the fourth target operating efficiency of the fuel cell system using the current charging capacity and the maximum charging capacity, and the fourth target operating efficiency is used to control the fuel cell system to execute the electric energy consumption strategy.

4. The method according to claim 1, It is characterized in that The controlling the vehicle to execute the electric energy consumption strategy includes: Determining whether the ambient temperature of the current environment of the power battery meets a preset temperature condition; If the ambient temperature does not satisfy the preset temperature condition, the vehicle is controlled to execute the electric energy consumption strategy until the ambient temperature satisfies the preset temperature condition.

5. The method according to claim 1, It is characterized in that After controlling the vehicle to execute the electric energy consumption strategy, the method further includes: Storing the electric energy consumption strategy, the charging capacity of the power battery corresponding to the electric energy consumption strategy, and the at least one state parameter as a set of historical data in a preset database; Based on the multiple groups of historical data in the preset database, corresponding optimization strategies for the power battery and / or the drive motor and the fuel cell system are generated to optimize the power battery and / or the drive motor and the fuel cell system.

6. A device for preventing power battery from overcharging, It is characterized in that include: An acquisition module is used to acquire the current charging capacity of the power battery; A judgment module, used for judging whether the power battery meets a preset overcharge prevention condition according to the current charging capacity and the maximum charging capacity of the power battery; A generation module is used to obtain at least one state parameter of the drive motor and the fuel cell system when the power battery meets the preset overcharge prevention condition, so as to match the vehicle's power consumption strategy for preventing overcharging in combination with the at least one state parameter, the current charging capacity and the maximum charging capacity, and control the vehicle to execute the power consumption strategy.

7. The device according to claim 6, It is characterized in that The judging module comprises: An acquisition unit, used to acquire the maximum charging capacity of the power battery; a judging unit, configured to judge whether a difference between the current charging capacity and the maximum charging capacity is greater than a preset overshoot value; A generating unit is used to determine that the power battery meets the preset overshoot prevention condition if the difference is greater than the preset overshoot value, and obtain at least one state parameter of the drive motor and the fuel cell system; otherwise, determine that the power battery does not meet the preset overshoot prevention condition, and obtain the charging capacity of the power battery at the next moment.

8. A vehicle, It is characterized in that include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the method for preventing overcharging of a power battery as described in any one of claims 1 to 5.

9. A computer-readable storage medium having a computer program stored thereon, It is characterized in that The program is executed by a processor to implement the method for preventing power battery overcharging as described in any one of claims 1 to 5.

10. A computer program product comprising a computer program, It is characterized in that When the computer program is executed, it is used to implement the method for preventing power battery overcharging as described in any one of claims 1 to 5.

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