Soc balancing control method, vehicle controller, device and readable storage medium

Abstract

The application discloses a fuel cell vehicle SOC balance control method, comprising: obtaining vehicle signals, the vehicle signals comprising an ambient temperature, a battery SOC value, a torque management mode and a vehicle consumption power; extracting an SOC balance power according to the ambient temperature and the battery SOC value; calculating a theoretical request power of a fuel cell according to the torque management mode, the vehicle consumption power and the SOC balance power; performing correction processing on the theoretical request power to generate an actual request power of the fuel cell; and sending the actual request power to a fuel cell vehicle controller to drive the fuel cell to respond to the actual request power. The application also discloses a vehicle controller, a computer device and a computer readable storage medium. By using the application, the output power of the fuel cell can be adjusted in real time, so that the SOC of the fuel cell vehicle is maintained in a reasonable range.

Description

Technical Field

[0001] This invention relates to the field of fuel cell vehicle technology, and in particular to a fuel cell vehicle SOC balance control method, vehicle controller, computer equipment, and computer-readable storage medium. Background Technology

[0002] With the continuous depletion of traditional fossil fuels, the development and utilization of new energy vehicles has gradually become a trend, and fuel cell vehicles are one type of new energy vehicle. The power generation of a fuel cell vehicle is mainly determined by the vehicle controller based on the remaining charge (State of Charge, SOC) of the power battery. Therefore, the SOC balancing strategy of fuel cell vehicles is a key factor affecting their driving range and the lifespan of the fuel cell.

[0003] Currently, battery SOC balancing strategies primarily adjust the requested power of the fuel cell based on the vehicle's power demand, without considering the impact of low-temperature environments on the fuel cell. Therefore, existing battery SOC balancing strategies use the same requested power and balancing rate across all temperature conditions, failing to make optimal decisions for vehicle performance and battery lifespan protection. Furthermore, they cannot achieve the functionality of allowing for longer charging cycles at lower power at normal temperatures and quickly restoring the SOC to a reasonable range at low temperatures.

[0004] In summary, how to rationally control the energy of fuel cells is an urgent problem to be solved in order to better utilize fuel cell vehicles. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a fuel cell vehicle SOC balance control method, a vehicle controller, a computer device and a computer-readable storage medium, which can adjust the output power of the fuel cell in real time to ensure that the vehicle fuel cell SOC is maintained within a reasonable range.

[0006] To address the aforementioned technical problems, this invention provides a fuel cell vehicle SOC balance control method, comprising: acquiring vehicle signals, the vehicle signals including ambient temperature, battery SOC value, torque management mode, and vehicle power consumption; extracting SOC balance power based on the ambient temperature and battery SOC value; calculating the theoretical requested power of the fuel cell based on the torque management mode, vehicle power consumption, and SOC balance power; correcting the theoretical requested power to generate the actual requested power of the fuel cell; and sending the actual requested power to the fuel cell vehicle controller to drive the fuel cell to respond to the actual requested power.

[0007] As an improvement to the above scheme, the relationship between the battery SOC value and the SOC balance power includes: when the battery SOC value is higher than the upper limit of the preset ideal balance SOC range, the SOC balance power is negative; when the battery SOC value is lower than the lower limit of the preset ideal balance SOC range, the SOC balance power is positive.

[0008] As an improvement to the above scheme, both the upper and lower limits of the ideal equilibrium SOC range increase as the ambient temperature decreases.

[0009] As an improvement to the above solution, the step of calculating the theoretical requested power of the fuel cell based on the torque management mode, fuel cell request, accessory power consumption, vehicle power consumption, and SOC balance power includes: determining whether the torque management mode is a driving mode; the accessory power consumption includes motor power, auxiliary power, accessory power, accelerator pedal correction power, and OBC external discharge power; when the torque management mode is a driving mode, the theoretical requested power is the sum of motor power, auxiliary power, accessory power, and SOC balance power; when the torque management mode is not a driving mode, determining whether the torque management mode is an idle mode. In idle mode, the theoretical requested power is the sum of accessory power, accelerator pedal correction power, and SOC balance power. When the torque management mode is not idle mode, it is determined whether the vehicle is in a discharge condition and whether the fuel cell discharge condition is a fuel cell start request. When the vehicle is in a discharge condition and the fuel cell discharge condition is a fuel cell start request, the theoretical requested power is the sum of accessory power, motor power, OBC external discharge power, and SOC balance power. Otherwise, when the discharge condition is a fuel cell start request, the theoretical requested power is 0.

[0010] As an improvement to the above scheme, the step of correcting the theoretical requested power to generate the actual requested power of the fuel cell includes: correcting the theoretical requested power of the fuel cell based on the rechargeable power of the power battery, the limited power generation of the fuel cell, and the temperature of the fuel cell, thereby generating the actual requested power of the fuel cell.

[0011] As an improvement to the above scheme, the step of correcting the theoretical requested power to generate the actual requested power of the fuel cell includes: extracting the fuel cell rated power based on the fuel cell temperature; extracting the minimum power from the fuel cell rated power, the rechargeable power of the power battery, the fuel cell limited power generation, and the fuel cell theoretical requested power; and using the minimum power as the actual requested power of the fuel cell.

[0012] Accordingly, the present invention also provides a vehicle controller, comprising: an acquisition module for acquiring vehicle signals, the vehicle signals including ambient temperature, battery SOC value, torque management mode, and vehicle power consumption; an extraction module for extracting SOC balance power based on the ambient temperature and battery SOC value; a calculation module for calculating the theoretical requested power of the fuel cell based on the torque management mode, vehicle power consumption, and SOC balance power; a correction module for correcting the theoretical requested power to generate the actual requested power of the fuel cell; and a transmission module for transmitting the actual requested power to the fuel cell vehicle controller to drive the fuel cell to respond to the actual requested power.

[0013] As an improvement to the above solution, the calculation module includes: a first judgment unit, used to determine whether the torque management mode is a driving mode, wherein the total vehicle power consumption includes motor power, accessory power, accelerator pedal correction power, and OBC external discharge power; a first processing unit, used to set the theoretical requested power to the sum of motor power, accessory power, and SOC balance power when the first judgment unit determines that the torque management mode is a driving mode; a second judgment unit, used to determine whether the torque management mode is an idling mode when the first judgment unit determines that the torque management mode is not a driving mode; and a second processing unit, used to determine whether the torque management mode is an idling mode when the second judgment unit determines that the torque management mode is an idling mode. In idle mode, the theoretical requested power is set to the sum of accessory power, accelerator pedal correction power, and SOC balance power; the third judgment unit is used to determine whether the vehicle is in a discharge condition and whether the fuel cell needs to be started when the second judgment unit determines that the torque management mode is not idle mode; the third processing unit is used to set the theoretical requested power to the sum of accessory power, OBC external discharge power, and SOC balance power when the third judgment unit determines that the vehicle is in a discharge condition and the fuel cell needs to be started; the fourth processing unit is used to set the theoretical requested power to 0 when the third judgment unit determines that the vehicle is not in a discharge condition and / or the fuel cell does not need to be started.

[0014] As an improvement to the above solution, the correction module includes: an extraction unit for extracting the fuel cell rated power based on the fuel cell temperature; a correction unit for extracting the minimum power among the fuel cell rated power, the rechargeable power of the power battery, the fuel cell limited power generation, and the fuel cell theoretical requested power; and a setting unit for setting the minimum power as the actual requested power of the fuel cell.

[0015] Accordingly, the present invention also provides a computer device, including a memory and a processor, wherein the memory stores a computer program and the processor executes the steps of the above-described fuel cell vehicle SOC balance control method.

[0016] Accordingly, the present invention also provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of the above-described fuel cell vehicle SOC balance control method.

[0017] Implementing this invention has the following beneficial effects:

[0018] This invention can dynamically adjust the SOC balance power according to the current vehicle status (such as ambient temperature and battery SOC value), so that the power battery charge can be restored to the optimal range more quickly, so as to adapt to the vehicle performance under various temperatures and protect the fuel cell to the greatest extent.

[0019] Meanwhile, the present invention can adaptively adjust the power consumption of the vehicle according to the current driver's operating state (such as torque management mode) to adapt to the real-time state of the vehicle.

[0020] Therefore, from the perspective of vehicle control, the present invention adjusts the output power of the fuel cell in real time according to the current vehicle status and the driver's operating status, thereby ensuring that the SOC of the fuel cell vehicle is maintained within a reasonable range. Attached Figure Description

[0021] Figure 1 This is a flowchart illustrating an embodiment of the fuel cell vehicle SOC balance control method of the present invention;

[0022] Figure 2 This is a flowchart illustrating an embodiment of the present invention that calculates the theoretical requested power of a fuel cell based on torque management mode, vehicle power consumption, and SOC balance power.

[0023] Figure 3 This is a schematic diagram of the vehicle controller of the present invention;

[0024] Figure 4 This is a schematic diagram of the computing module in the vehicle controller of the present invention;

[0025] Figure 5 This is a schematic diagram of the correction module in the vehicle controller of the present invention. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings.

[0027] See Figure 1 , Figure 1 A flowchart illustrating an embodiment of the fuel cell vehicle SOC balance control method of the present invention is shown, which includes:

[0028] S101, Obtain vehicle signal.

[0029] The vehicle signals include ambient temperature, battery SOC value, torque management mode, and total vehicle power consumption.

[0030] S102 extracts the SOC balance power based on the ambient temperature and battery SOC value.

[0031] In low-temperature environments, fuel cells require a high-pressure heater to heat them before starting. Since the amount of electricity required for heating varies with ambient temperature, the State of Charge (SOC) balance point should be higher than at room temperature in low-temperature environments to ensure a smooth cold start for subsequent startups. However, existing SOC balancing strategies use the same SOC balancing power at different ambient temperatures, preventing the fuel cell from achieving the function of "allowing longer charging cycles at lower power at room temperature and quickly restoring the SOC to a reasonable range at low temperatures." Unlike existing technologies, this invention adjusts the SOC balancing power based on ambient temperature and the battery's SOC value, ensuring that the fuel cell can more rationally and quickly adjust its SOC value to the optimal range within its power generation capacity, thus guaranteeing both vehicle performance and fuel cell lifespan.

[0032] In this invention, the inventors construct a relationship table between ambient temperature, battery SOC value, and SOC balance power according to preset rules. During the control process, the vehicle controller can extract the corresponding SOC balance power from the relationship table based on the real-time acquired ambient temperature and battery SOC value.

[0033] Specifically, the preset rules include: when the battery SOC value is higher than the upper limit of the preset ideal balance SOC range, the SOC balance power is negative, thereby discharging the power battery and decreasing the battery SOC value; when the battery SOC value is lower than the lower limit of the preset ideal balance SOC range, the SOC balance power is positive, thereby charging the power battery and increasing the battery SOC value.

[0034] Meanwhile, to achieve balanced SOC control in fuel cell vehicles, this invention dynamically adjusts the ideal balanced SOC range based on ambient temperature. Specifically, both the upper and lower limits of the ideal balanced SOC range increase as the ambient temperature decreases. That is, in non-low-temperature environments, the upper and lower limits of the ideal balanced SOC range can be appropriately lowered, and within a certain range, the balancing cycle can be appropriately extended, using less power to balance the SOC, ensuring the fuel cell charges the power battery with a smaller current, thus protecting the fuel cell's lifespan. In low-temperature environments, the upper and lower limits of the ideal balanced SOC range can be appropriately raised (i.e., the SOC threshold limiting the SOC balancing power will be higher), using a faster rate and greater power to balance the SOC (i.e., reserving more SOC to ensure a successful cold start for the next fuel cell cycle), ensuring the vehicle's driving and starting performance at low temperatures.

[0035] For example, when the ambient temperature is 15°C, the ideal balance SOC range can be set to 50%-70%; when the ambient temperature drops to 5°C, the ideal balance SOC range can be set to 55%-75%; and when the ambient temperature rises to 25°C, the ideal balance SOC range can be set to 45%-65%.

[0036] Therefore, the present invention can adjust the SOC balance power according to the ambient temperature and the battery SOC value, so that the power battery charge can be restored to the optimal range more quickly, so as to adapt to the vehicle performance under various temperatures and protect the fuel cell to the greatest extent.

[0037] S103 calculates the theoretical requested power of the fuel cell based on the torque management mode, the power consumption of the whole vehicle, and the SOC balance power.

[0038] Generally, the theoretically requested power is the sum of the real-time vehicle power consumption and the SOC (State of Charge) balanced power. The vehicle power consumption can be adaptively adjusted according to the driver's operating state (such as torque management mode). Simultaneously, since the SOC balanced power is dynamically adjusted, the theoretically requested power is also dynamically adjusted according to the actual situation.

[0039] S104, the theoretical requested power is corrected to generate the actual requested power of the fuel cell.

[0040] This invention can adjust the theoretical power demand of the fuel cell based on the rechargeable power of the power battery, the limited power generation of the fuel cell, and the temperature of the fuel cell, thereby generating the actual power demand of the fuel cell to ensure the safe operation of the fuel cell.

[0041] Specifically, the step of correcting the theoretical requested power to generate the actual requested power of the fuel cell includes:

[0042] (1) Extract the rated power of the fuel cell based on the fuel cell temperature.

[0043] It should be noted that those skilled in the art can construct a relationship table between fuel cell temperature and fuel cell rated power according to preset rules. Through the relationship table, the corresponding fuel cell rated power can be extracted based on the obtained fuel cell temperature.

[0044] (2) Extract the minimum power from the fuel cell rated power, the power battery rechargeable power, the fuel cell limited power generation power, and the fuel cell theoretical requested power.

[0045] (3) The minimum power is taken as the actual requested power of the fuel cell.

[0046] S105, the actual requested power is sent to the fuel cell vehicle controller to drive the fuel cell to respond to the actual requested power.

[0047] The vehicle controller can send the actual requested power to the fuel cell vehicle controller (FCCU) through the Controller Area Network (CAN). Then, the fuel cell gradually responds to the actual requested power from the vehicle controller to generate electricity. The power generated by the fuel cell is used not only for the vehicle but also to charge the power battery to ensure that the battery's SOC value can be balanced within a reasonable range.

[0048] Therefore, from the perspective of vehicle control, the present invention adjusts the output power of the fuel cell in real time according to the current vehicle status and the driver's operating status, thereby ensuring that the SOC of the vehicle's power battery is maintained within a reasonable range.

[0049] See Figure 2 , Figure 2 This invention illustrates a flowchart of an embodiment for calculating the theoretical requested power of a fuel cell based on torque management mode, vehicle power consumption, and SOC balance power, which includes:

[0050] S201, determine whether the torque management mode is a driving mode.

[0051] The total power consumption of the vehicle includes motor power, accessory power, accelerator pedal correction power, and OBC (on-board charger) power for external discharge.

[0052] S202, when the torque management mode is driving mode, the theoretically requested power is the sum of motor power, accessory power and SOC balance power.

[0053] The sum of the motor power and the accessory power represents the real-time power consumption of the entire vehicle. In other words, when the torque management mode is driving mode, the theoretically requested power is the sum of the real-time power consumption of the entire vehicle and the SOC (State of Charge) balance power.

[0054] Therefore, when the battery SOC value is higher than the upper limit of the preset ideal balance SOC range, the SOC balance power is negative. At this time, the theoretically requested power is less than the power consumed by the vehicle, causing the power battery to discharge and the battery SOC value to decrease. When the battery SOC value is lower than the lower limit of the preset ideal balance SOC range, the SOC balance power is positive. At this time, the theoretically requested power is greater than the power consumed by the vehicle, and the excess power is used to charge the power battery, increasing the battery SOC value.

[0055] S203, when the torque management mode is not driving mode, determine whether the torque management mode is idling mode.

[0056] S204, when the torque management mode is idle mode, the theoretically requested power is the sum of accessory power, accelerator pedal correction power and SOC balance power.

[0057] The sum of the accessory power and the accelerator pedal correction power is the real-time power consumption of the entire vehicle. In other words, when the torque management mode is idle mode, the theoretically requested power is the sum of the real-time power consumption of the entire vehicle and the SOC balance power.

[0058] Therefore, when the battery SOC value is higher than the upper limit of the preset ideal balance SOC range, the SOC balance power is negative. At this time, the theoretically requested power is less than the power consumed by the vehicle, causing the power battery to discharge and the battery SOC value to decrease. When the battery SOC value is lower than the lower limit of the preset ideal balance SOC range, the SOC balance power is positive. At this time, the theoretically requested power is greater than the power consumed by the vehicle, and the excess power is used to charge the power battery, increasing the battery SOC value.

[0059] S205, when the torque management mode is not idle mode, determine whether the vehicle is in discharge mode and whether the fuel cell needs to be started.

[0060] S206, When the vehicle is in discharge mode and the fuel cell needs to be started, the theoretically requested power is the sum of the accessory power, the OBC external discharge power, and the SOC balance power.

[0061] The sum of the accessory power and the OBC external discharge power is the real-time power consumption of the entire vehicle. In other words, when the vehicle is in discharge mode and needs to start the fuel cell, the theoretically requested power is the sum of the real-time power consumption of the entire vehicle and the SOC balance power.

[0062] Therefore, when the battery SOC value is higher than the upper limit of the preset ideal balance SOC range, the SOC balance power is negative. At this time, the theoretically requested power is less than the power consumed by the vehicle, causing the power battery to discharge and the battery SOC value to decrease. When the battery SOC value is lower than the lower limit of the preset ideal balance SOC range, the SOC balance power is positive. At this time, the theoretically requested power is greater than the power consumed by the vehicle, and the excess power is used to charge the power battery, increasing the battery SOC value.

[0063] S207, when the vehicle is not in a discharge condition and / or the fuel cell does not need to be started, the theoretically requested power is 0.

[0064] In summary, the present invention can adjust the output power of the fuel cell in real time according to the current vehicle status and the driver's operating status, thereby ensuring that the vehicle fuel cell SOC is maintained within a reasonable range.

[0065] See Figure 3 , Figure 3 The specific structure of the vehicle controller 100 of the present invention is shown, which includes an acquisition module 1, an extraction module 2, a calculation module 3, a correction module 4, and a transmission module 5, specifically:

[0066] Acquisition module 1 is used to acquire vehicle signals. The vehicle signals include ambient temperature, battery SOC value, torque management mode, and overall vehicle power consumption.

[0067] Extraction module 2 is used to extract the SOC balance power based on the ambient temperature and battery SOC value. Specifically, extraction module 2 stores a relationship table between ambient temperature, battery SOC value, and SOC balance power. This relationship table is set by technicians according to preset rules. During the control process, extraction module 2 can extract the corresponding SOC balance power from the relationship table based on the real-time acquired ambient temperature and battery SOC value.

[0068] The calculation module 3 is used to calculate the theoretical requested power of the fuel cell based on the torque management mode, the power consumption of the whole vehicle, and the SOC balance power.

[0069] Correction module 4 is used to correct the theoretical requested power to generate the actual requested power of the fuel cell. Specifically, correction module 4 can correct the theoretical requested power of the fuel cell based on the rechargeable power of the power battery, the limited power generation of the fuel cell, and the fuel cell temperature to generate the actual requested power of the fuel cell, thereby ensuring the safe operation of the fuel cell.

[0070] The transmitting module 5 is used to send the actual requested power to the fuel cell vehicle controller to drive the fuel cell to respond to the actual requested power. Specifically, the transmitting module 5 can send the actual requested power to the fuel cell vehicle controller (FCCU) via the Controller Area Network (CAN); then, the fuel cell gradually responds to the actual requested power from the vehicle controller to generate electricity; the power generated by the fuel cell is used not only for the consumption of the vehicle but also to charge the power battery to ensure that the battery's SOC value can be balanced within a reasonable range.

[0071] Therefore, the present invention can adjust the theoretical power demand of the fuel cell according to the ambient temperature, battery SOC value and driver's operating status, so that the power battery charge can be restored to the optimal range more quickly, so as to adapt to vehicle performance under various temperatures and protect the fuel cell to the greatest extent.

[0072] like Figure 4 As shown, the computing module 3 includes:

[0073] The first judgment unit 31 is used to determine whether the torque management mode is a driving mode. The total vehicle power consumption includes motor power, accessory power, accelerator pedal correction power, and OBC external discharge power.

[0074] The first processing unit 32 is configured to set the theoretical requested power as the sum of motor power, accessory power and SOC balance power when the first judgment unit 31 determines that the torque management mode is driving mode.

[0075] The second judgment unit 33 is used to determine whether the torque management mode is an idle mode when the first judgment unit 31 determines that the torque management mode is not a driving mode.

[0076] The second processing unit 34 is used to set the theoretical requested power as the sum of accessory power, accelerator pedal correction power and SOC balance power when the second judgment unit 33 determines that the torque management mode is idle mode.

[0077] The third judgment unit 35 is used to determine whether the vehicle is in a discharge condition and needs to start the fuel cell when the second judgment unit 33 determines that the torque management mode is not an idle mode.

[0078] The third processing unit 36 ​​is used to set the theoretical requested power as the sum of the accessory power, the OBC external discharge power, and the SOC balance power when the third judgment unit 35 determines that the vehicle is in a discharge condition and the fuel cell needs to be started.

[0079] The fourth processing unit 37 is used to set the theoretical requested power to 0 when the third judgment unit 35 determines that the vehicle is not in a discharge condition and / or does not need to start the fuel cell.

[0080] It should be noted that when the SOC balance power obtained from the query table is negative, the theoretically requested power is less than the power consumed by the vehicle, causing the power battery to discharge and the battery SOC value to decrease; when the SOC balance power obtained from the query table is positive, the theoretically requested power is greater than the power consumed by the vehicle, and the excess power is used to charge the power battery, increasing the battery SOC value.

[0081] Therefore, the power consumption of the vehicle can be adaptively adjusted according to the driver's operating status. At the same time, since the SOC balanced power is dynamically adjusted, the theoretically requested power is also dynamically adjusted according to the actual situation.

[0082] like Figure 5 As shown, the correction module 4 includes:

[0083] Extraction unit 41 is used to extract the rated power of the fuel cell based on the fuel cell temperature. It should be noted that extraction unit 41 stores a relationship table between fuel cell temperature and rated power, and can extract the corresponding rated power of the fuel cell based on the acquired fuel cell temperature.

[0084] The correction unit 42 is used to extract the minimum power from the fuel cell rated power, the power battery rechargeable power, the fuel cell limited power generation power, and the fuel cell theoretically requested power.

[0085] Setting unit 43 is used to set the minimum power as the actual requested power of the fuel cell.

[0086] In summary, by correcting the theoretical power demand using correction module 4, the safe operation of the fuel cell can be effectively guaranteed.

[0087] Accordingly, the present invention also provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps of the above-described fuel cell vehicle SOC balance control method. Simultaneously, the present invention also provides a computer-readable storage medium storing a computer program thereon, wherein the computer program, when executed by a processor, implements the steps of the above-described fuel cell vehicle SOC balance control method.

[0088] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A fuel cell vehicle SOC balancing control method characterized by, The method comprises the following steps: acquiring vehicle signals, wherein the vehicle signals comprise an ambient temperature, a battery SOC value, a torque management mode, and a total vehicle consumption power; the torque management mode comprises a driving mode and an idling mode; extracting an SOC balance power according to the ambient temperature and the battery SOC value, so as to adjust the SOC balance power according to the ambient temperature and the battery SOC value, and restore the power of the power battery to an optimal region; calculating a theoretical request power of a fuel cell according to the torque management mode, the total vehicle consumption power, and the SOC balance power; correcting the theoretical request power to generate an actual request power of the fuel cell; sending the actual request power to a fuel cell vehicle controller to drive the fuel cell to respond to the actual request power.

2. The fuel cell vehicle SOC balancing control method according to claim 1, characterized by, The relationship between the battery SOC value and the SOC balance power comprises: when the battery SOC value is higher than an upper limit of a preset ideal balance SOC range, the SOC balance power is a negative value; when the battery SOC value is lower than a lower limit of the preset ideal balance SOC range, the SOC balance power is a positive value.

3. The fuel cell vehicle SOC balancing control method according to claim 2, characterized by, The upper limit and the lower limit of the ideal balance SOC range are both increased with the decrease of the ambient temperature.

4. The fuel cell vehicle SOC balancing control method according to claim 1, characterized by, The step of calculating the theoretical request power of the fuel cell according to the torque management mode, the total vehicle consumption power, and the SOC balance power comprises: judging whether the torque management mode is the driving mode, wherein the total vehicle consumption power comprises a motor power, an accessory power, an acceleration pedal correction power, and an OBC external discharge power; when the torque management mode is the driving mode, the theoretical request power is the sum of the motor power, the accessory power, and the SOC balance power; when the torque management mode is not the driving mode, judging whether the torque management mode is the idling mode; when the torque management mode is the idling mode, the theoretical request power is the sum of the accessory power, the acceleration pedal correction power, and the SOC balance power; when the torque management mode is not the idling mode, judging whether the vehicle is in a discharge working condition and whether the fuel cell needs to be started; when the vehicle is in the discharge working condition and the fuel cell needs to be started, the theoretical request power is the sum of the accessory power, the OBC external discharge power, and the SOC balance power, otherwise, the theoretical request power is 0.

5. The fuel cell vehicle SOC balancing control method according to claim 1, characterized by, The step of correcting the theoretical request power to generate the actual request power of the fuel cell comprises: correcting the theoretical request power of the fuel cell according to a chargeable power of the power battery, a fuel cell limit power generation, and a fuel cell temperature to generate the actual request power of the fuel cell.

6. The fuel cell vehicle SOC balancing control method according to claim 5, characterized by, The step of correcting the theoretical request power to generate the actual request power of the fuel cell comprises: extracting a fuel cell rated power according to the fuel cell temperature; extracting a minimum power from the fuel cell rated power, the chargeable power of the power battery, the fuel cell limit power generation, and the theoretical request power of the fuel cell; taking the minimum power as the actual request power of the fuel cell.

7. A vehicle control unit, characterized by, The method comprises the following steps: an acquiring module is configured to acquire vehicle signals, wherein the vehicle signals comprise an ambient temperature, a battery SOC value, a torque management mode, and a total vehicle consumption power; The torque management mode comprises a driving mode and an idling mode; The extraction module is configured to extract an SOC balance power according to the ambient temperature and the battery SOC value, and adjust the SOC balance power according to the ambient temperature and the battery SOC value, so that the power of the power battery returns to an optimal region; The calculation module is configured to calculate a theoretical request power of the fuel cell according to the torque management mode, the vehicle consumption power and the SOC balance power; The correction module is configured to correct the theoretical request power to generate an actual request power of the fuel cell; The sending module is configured to send the actual request power to a fuel cell vehicle controller to drive the fuel cell to respond to the actual request power.

8. The vehicle control unit according to claim 7, characterized in that, The calculation module comprises: The first judgment unit is configured to judge whether the torque management mode is the driving mode, and the vehicle consumption power comprises a motor power, an accessory power, an acceleration pedal correction power and an OBC external discharge power; The first processing unit is configured to set the theoretical request power as a sum of the motor power, the accessory power and the SOC balance power when the first judgment unit judges that the torque management mode is the driving mode; The second judgment unit is configured to judge whether the torque management mode is the idling mode when the first judgment unit judges that the torque management mode is not the driving mode; The second processing unit is configured to set the theoretical request power as a sum of the accessory power, the acceleration pedal correction power and the SOC balance power when the second judgment unit judges that the torque management mode is the idling mode; The third judgment unit is configured to judge whether the vehicle is in a discharge working condition and whether the fuel cell needs to be started when the second judgment unit judges that the torque management mode is not the idling mode; The third processing unit is configured to set the theoretical request power as a sum of the accessory power, the OBC external discharge power and the SOC balance power when the third judgment unit judges that the vehicle is in the discharge working condition and the fuel cell needs to be started; The fourth processing unit is configured to set the theoretical request power as 0 when the third judgment unit judges that the vehicle is not in the discharge working condition and / or the fuel cell does not need to be started.

9. The vehicle control unit according to claim 7, characterized in that, The correction module comprises: The extraction unit is configured to extract a fuel cell rated power according to a fuel cell temperature; The correction unit is configured to extract a minimum power among the fuel cell rated power, a chargeable power of the power battery, a fuel cell limit power generation and the theoretical request power of the fuel cell; The setting unit is configured to set the minimum power as the actual request power of the fuel cell. 10.A computer device, comprising a memory and a processor, wherein the memory stores a computer program, and the computer device is configured to perform the method according to any one of claims 1-9. The processor executes the computer program to realize the steps of the method in any one of claims 1 to 6.

11. A computer readable storage medium having stored thereon a computer program, characterized in that, The computer program is executed by the processor to realize the steps of the method in any one of claims 1 to 6.

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