Fuel cell reactor start-stop control method, device and equipment of hydrogen fuel vehicle and storage medium

Abstract

The invention discloses a fuel cell reactor start-stop control method, device and equipment of a hydrogen fuel vehicle and a storage medium, relates to the technical field of vehicle battery management, and discloses the fuel cell reactor start-stop control method of the hydrogen fuel vehicle, which comprises the following steps: controlling the vehicle to be electrified at high voltage, and detecting whether a fuel cell meets a reactor start condition or not; when it is detected that the fuel cell meets the stack starting condition, the stack operation state sent by the fuel cell control unit is received; stacking the fuel cell according to the running state of the electric pile, and detecting whether the fuel cell meets a shutdown condition or not; when it is detected that the fuel cell meets the shutdown condition, a high-voltage power-off permission state sent by the fuel cell control unit is received; and shutting down the fuel cell according to the shutting down condition and the high-voltage power-off permissible state. The reliability and the service life of the fuel cell system are effectively improved and prolonged by monitoring and responding to the high-voltage power-on state of the vehicle, the running state of the electric pile and the state signal sent by the fuel cell control unit in real time.

Description

Technical Field

[0001] The present application relates to the field of vehicle battery management technology, and in particular to a fuel cell start-stop stack control method, device, equipment and storage medium for a hydrogen fuel vehicle. Background Art

[0002] With the continuous development of the economy, the issue of energy security has become particularly important. The starting and stopping of current hydrogen fuel cell vehicles are basically controlled based on the battery state of charge (SOC) of the power battery being lower than a certain value, such as 70%, or higher than a certain value, such as 80%. There is no strategy developed in combination with the current actual maximum energy recovery power available for the power battery, the operating status of the fuel cell system, and the status of the vehicle's drive system.

[0003] However, the SOC value of the power battery will deviate as the vehicle is used for a longer time and needs to be corrected by charging at a charging station. Fuel cell vehicles convert chemical energy into electrical energy for the entire vehicle through a chemical reaction between hydrogen and oxygen in the fuel cell system under the action of a catalyst. In actual operation, most vehicles only go to hydrogen stations to refuel and not to charging stations. As time goes by, the SOC deviation will gradually increase and cannot truly reflect the current charging capacity of the power battery.

[0004] The above contents are only used to assist in understanding the technical solution of the present application and do not constitute an admission that the above contents are prior art. Summary of the invention

[0005] The main purpose of this application is to provide a fuel cell start-stop stack control method, device, equipment and storage medium for a hydrogen fuel cell vehicle, aiming to solve the technical problems of inaccuracy and unsafety caused by the start-stop control strategy of hydrogen fuel cell vehicles relying solely on the SOC value of the power battery.

[0006] To achieve the above objectives, the present application proposes a fuel cell start-stop stack control method for a hydrogen fuel vehicle, the method comprising:

[0007] Control the vehicle's high voltage power supply and detect whether the fuel cell meets the stacking conditions;

[0008] When it is detected that the fuel cell meets the stack starting condition, receiving the stack operation status sent by the fuel cell control unit;

[0009] Starting up the fuel cell stack according to the stack operation status, and detecting whether the fuel cell stack meets the shutdown condition;

[0010] When it is detected that the fuel cell meets the shutdown condition, receiving the high voltage power-off permission state sent by the fuel cell control unit;

[0011] The fuel cell is shut down according to the shutdown condition and the high voltage power-off permission state.

[0012] In one embodiment, the step of controlling the vehicle high voltage to be powered on and detecting whether the fuel cell meets the stacking conditions includes:

[0013] Control vehicle high voltage power-up;

[0014] Obtain the switch status of the vehicle's electric vehicle mode, the battery state of charge, the preset state of charge, the communication status of the fuel cell control unit, and the charging power and preset charging power of the battery management system;

[0015] When the switch state is an invalid state, the battery state of charge is less than the preset state of charge, the communication state is a preset communication state, and the charging power is greater than a preset charging power, it is determined that the fuel cell meets the stacking condition.

[0016] In one embodiment, the step of starting up the fuel cell stack according to the operating state of the fuel cell stack includes:

[0017] When the stack operation state is the first operation state, the second operation state and the third operation state, sending a stack start instruction to the fuel cell control unit so that the fuel cell control unit feeds back a new stack operation state and records the instruction sending time;

[0018] Obtaining the instruction sending time period according to the instruction sending time;

[0019] When the instruction sending time period is less than the preset sending time period and the new stack operating state is the second operating state or the fourth operating state, a stack start instruction is sent to the fuel cell control unit so that the fuel cell control unit starts the fuel cell stack according to the stack start instruction.

[0020] In one embodiment, the step of detecting whether the fuel cell meets the shutdown condition comprises:

[0021] Obtain the switch state of the vehicle's electric vehicle mode, the battery state of charge, the preset state of charge, the communication state of the fuel cell control unit, the communication state retention time, and the charging power of the battery management system and the preset charging power;

[0022] When the vehicle is in a non-high-voltage power-on state, the switch state is in a valid state, the battery charge state is greater than or equal to the preset charge state, the charging power is less than the preset charging power, the communication state is the preset communication state and the communication state is maintained for a time greater than the preset communication time, and the stack operating state is not at least one of the second operating state, the third operating state, and the fourth operating state, it is determined that the fuel cell meets the shutdown conditions.

[0023] In one embodiment, the step of shutting down the fuel cell stack according to the shutdown condition and the high voltage power-off permission state comprises:

[0024] When the shutdown condition is that the communication state is a preset communication state and the communication state is maintained for a time greater than the preset communication time, a shutdown instruction is sent to the fuel cell control unit according to the high-voltage power-off permission state, so that the fuel cell control unit controls the vehicle to power off the high voltage according to the shutdown instruction and completes the shutdown operation.

[0025] In one embodiment, the step of shutting down the fuel cell stack according to the shutdown condition and the high voltage power-off permission state further includes:

[0026] When the shutdown condition is that the vehicle is in a non-high-voltage powered-on state, obtaining a high-voltage powered-off state of the vehicle;

[0027] According to the high voltage power-off permission state, a preset high voltage permission state receiving time is obtained;

[0028] The fuel cell stack is shut down according to the high voltage power-down state and the preset high voltage permission state receiving time.

[0029] In one embodiment, the step of shutting down the fuel cell stack according to the high voltage power-down state and the high voltage permission state receiving time comprises:

[0030] Acquire a first preset receiving time and a second preset receiving time, wherein the first preset receiving time is less than the second preset receiving time;

[0031] When the high-voltage power-off state is non-high-voltage power-off and the preset high-voltage permission state reception time is greater than the first preset reception time, sending a shutdown instruction to the fuel cell control unit so that the fuel cell control unit completes the fuel cell shutdown according to the shutdown instruction;

[0032] When the high-voltage power-off state is high-voltage power-off and the preset high-voltage permission state receiving time is greater than the second preset receiving time, the high-voltage circuit between the fuel cell and the vehicle is cut off to complete the fuel cell shutdown.

[0033] In addition, to achieve the above-mentioned purpose, the present application also proposes a fuel cell start-stop stack control device for a hydrogen fuel vehicle, the fuel cell start-stop stack control device for a hydrogen fuel vehicle comprises: a power-on module, used to control the high voltage power-on of the vehicle and detect whether the fuel cell meets the stack start-up conditions;

[0034] A receiving module, used for receiving a fuel cell stack operation status sent by a fuel cell control unit when it is detected that the fuel cell meets the stack starting condition;

[0035] A stacking module, used to stack the fuel cell according to the operating state of the fuel cell stack and detect whether the fuel cell meets the shutdown condition;

[0036] The receiving module is further used to receive the high voltage power-off permission state sent by the fuel cell control unit when it is detected that the fuel cell meets the shutdown condition;

[0037] A shutdown module is used to shut down the fuel cell according to the shutdown condition and the high voltage power-off permission state.

[0038] In addition, to achieve the above-mentioned purpose, the present application also proposes a fuel cell start-stop stack control device for a hydrogen fuel vehicle, the device comprising: a memory, a processor, and a computer program stored on the memory and executable on the processor, the computer program being configured to implement the steps of the fuel cell start-stop stack control method for a hydrogen fuel vehicle as described above.

[0039] In addition, to achieve the above-mentioned purpose, the present application also proposes a storage medium, which is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by the processor, the steps of the fuel cell start-stop stack control method for a hydrogen fuel vehicle as described above are implemented.

[0040] In addition, to achieve the above-mentioned purpose, the present application also provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, it implements the steps of the fuel cell start-stop stack control method for a hydrogen fuel vehicle as described above.

[0041] One or more technical solutions proposed in this application have at least the following technical effects:

[0042] The technical means of controlling the vehicle high voltage power-on and detecting whether the fuel cell meets the starting conditions; receiving the stack operation status sent by the fuel cell control unit when detecting that the fuel cell meets the starting conditions; starting the fuel cell according to the stack operation status and detecting whether the fuel cell meets the stopping conditions; receiving the high voltage power-off permission status sent by the fuel cell control unit when detecting that the fuel cell meets the stopping conditions; stopping the fuel cell according to the stopping conditions and the high voltage power-off permission status solves the limitation of relying only on the power battery SOC value for start-stop control, and avoids the problems of overcharging of the power battery and frequent start-stop of the fuel cell system caused by SOC deviation. More accurate and reliable start-stop control of the fuel cell system is achieved, the service life of the fuel cell system and the energy management efficiency of the whole vehicle are improved, thereby enhancing the operating safety and economy of hydrogen fuel cell vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0044] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0045] Figure 1 A flow chart of a method for controlling a fuel cell start-stop stack of a hydrogen fuel vehicle according to an embodiment of the present invention;

[0046] Figure 2 A schematic diagram of a stacking process provided in Example 1 of a fuel cell start-stop stack control method for a hydrogen fuel vehicle of the present application;

[0047] Figure 3 A flow chart of a second embodiment of a fuel cell start-stop stack control method for a hydrogen fuel vehicle of the present application;

[0048] Figure 4 A schematic diagram of a fuel cell shutdown process provided in Embodiment 2 of the fuel cell start-stop control method for a hydrogen fuel vehicle of the present application;

[0049] Figure 5 This is a schematic diagram of the module structure of a fuel cell start-stop stack control device for a hydrogen fuel vehicle according to an embodiment of the present application;

[0050] Figure 6 Schematic diagram of the equipment structure of the hardware operating environment involved in the fuel cell start-stop stack control method for a hydrogen fuel vehicle in an embodiment of the present application.

[0051] The purpose, features and advantages of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0052] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application and are not used to limit the present application.

[0053] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0054] The main solution of the embodiment of the present application is: control the vehicle high voltage power-on and detect whether the fuel cell meets the stack starting conditions; when it is detected that the fuel cell meets the stack starting conditions, receive the stack operation status sent by the fuel cell control unit; stack the fuel cell according to the stack operation status, and detect whether the fuel cell meets the stack shutdown conditions; when it is detected that the fuel cell meets the stack shutdown conditions, receive the high voltage power-off permission status sent by the fuel cell control unit; shut down the fuel cell according to the stack shutdown conditions and the high voltage power-off permission status.

[0055] In this embodiment, for the convenience of description, the vehicle controller is used as the execution subject for explanation below.

[0056] Due to the inaccuracy and insecurity caused by the existing hydrogen fuel cell vehicle start-stop control strategy relying only on the power battery SOC value, this application provides a solution, which adopts the control of vehicle high voltage power-on and detects whether the fuel cell meets the stacking conditions; when it is detected that the fuel cell meets the stacking conditions, the stack operation state sent by the fuel cell control unit is received; the fuel cell stack is started according to the stack operation state, and whether the fuel cell meets the stacking conditions is detected; when it is detected that the fuel cell meets the stacking conditions, the high voltage power-off permission state sent by the fuel cell control unit is received; the technical means of fuel cell stacking is stopped according to the stacking conditions and the high voltage power-off permission state, which solves the limitation of relying only on the power battery SOC value for start-stop control, and avoids the problems of overcharging of the power battery and frequent start-stop of the fuel cell system caused by SOC deviation. A more accurate and reliable fuel cell system start-stop control is achieved, the service life of the fuel cell system and the energy management efficiency of the whole vehicle are improved, thereby enhancing the operating safety and economy of hydrogen fuel cell vehicles.

[0057] It should be noted that the execution subject of this embodiment can be a computing service device with data processing, network communication and program running functions, such as a tablet computer, a personal computer, a mobile phone, etc., or an electronic device capable of realizing the above functions, a fuel cell start-stop stack control device of a hydrogen fuel vehicle, and a vehicle controller, etc. The following takes the vehicle controller as an example to illustrate this embodiment and the following embodiments.

[0058] Based on this, the embodiment of the present application provides a fuel cell start-stop stack control method for a hydrogen fuel vehicle, referring to Figure 1 , Figure 1 This is a flow chart of the first embodiment of the fuel cell start-stop stack control method for a hydrogen fuel vehicle of the present application.

[0059] In this embodiment, the fuel cell start-stop stack control method of the fuel vehicle includes steps S10 to S50:

[0060] Step S10, controlling the vehicle to be powered on with high voltage, and detecting whether the fuel cell meets the stacking conditions;

[0061] It should be noted that a fuel cell is a device that directly converts the chemical energy of hydrogen and oxygen into electrical energy. It generates electricity through electrochemical reactions and is often used in hydrogen fuel cell vehicles as one of the power sources. The starting conditions refer to a series of pre-set conditions. Only when all these conditions are met will the fuel cell system start. These conditions include but are not limited to the pressure, temperature, hydrogen and oxygen supply conditions, system fault conditions, etc. of the fuel cell system.

[0062] It can be understood that controlling the vehicle's high voltage power-on means issuing a command through the vehicle's control unit to connect the vehicle's high voltage power supply system so that the vehicle's high voltage battery starts to supply power to the vehicle's electrical system. High voltage power-on is the basis for the operation of electric vehicles and their high voltage systems, ensuring that the vehicle's electrical equipment can work normally.

[0063] In a feasible implementation, step S10 may include steps S11 to S13:

[0064] Step S11, controlling the vehicle to be powered on with high voltage;

[0065] It is understandable that the steps of controlling the high voltage power-on of the vehicle can be: after detecting that the vehicle key is powered on, the fuel cell control unit (FCU) and the hydrogen management system (HMS) are awakened through the low voltage relay, and after the FCU and HMS are turned on, the FCU can receive instructions from the vehicle control unit (VCU). Then the main negative relay, the main positive relay and the auxiliary drive relay are closed to complete the high voltage power-on of the vehicle.

[0066] The low-voltage wake-up source of FCU and HMS is controlled by VCU, which delays power-off to avoid the low-voltage power supply being cut off directly when the key is turned off and FCU and HMS have not completed the work required before shutdown, such as purge and blowing.

[0067] Step S12, obtaining the switch state of the vehicle electric vehicle mode, the battery state of charge, the preset state of charge, the communication state of the fuel cell control unit, and the charging power and preset charging power of the battery management system;

[0068] It should be noted that the switch state of the electric vehicle mode refers to the current state of the EV (electric vehicle) mode switch in the vehicle cab. The battery state of charge (SOC) is a percentage representation of the current remaining power of the battery and is one of the important parameters monitored by the battery management system (BMS). The preset state of charge is the SOC value preset in the control strategy, which is used as the basis for starting the fuel cell system. For example, if the preset SOC is lower than a certain value (such as 80%), the fuel cell system may be started to replenish the battery power. The communication status of the fuel cell control unit refers to the communication status between the fuel cell control unit (FCU) and the vehicle controller (VCU). Whether the communication status is normal is very important to ensure that the fuel cell system can receive instructions from the VCU. Charging power of the battery management system This is the charging power that the current battery management system allows the battery to accept, provided by the BMS. Preset charging power This is the charging power value preset in the control strategy, which is used to compare with the charging power.

[0069] Step S13, determining that the fuel cell meets the stacking condition when the switch state is an invalid state, the battery charge state is less than the preset charge state, the communication state is a preset communication state, and the charging power is greater than a preset charging power.

[0070] It is understandable that after step S11, it can be determined that the vehicle is in a pure electric high voltage power-on state. The switch state is an invalid state, indicating that it is necessary to determine whether the EV switch is invalid, that is, the vehicle needs to enter the fuel-electric mode.

[0071] Determine whether the battery state of charge is less than a preset state of charge. In this embodiment, the preset state of charge is 80%. When the battery SOC reaches 80%, the fuel cell system is shut down, that is, the fuel cell power generation is stopped to avoid overcharging. When the battery SOC drops from 80% to 70%, the fuel cell system is restarted to replenish the battery power.

[0072] In this embodiment, the preset communication state is a non-communication timeout state. Therefore, the communication state being the preset communication state indicates that normal communication between the VCU and the FCU is ensured so as to correctly transmit control signals.

[0073] The charging power is greater than the preset charging power, which means that if the charging power of the battery is greater than the preset value, it indicates that the battery can accept more charging. The charging power allowed by BMS can be expressed as: BMS allowed charging power = BMS available energy feedback power - motor energy feedback power. The preset charging power is set according to the power of the power battery, the battery at a certain temperature such as 10°C, and the battery soc at a certain value such as 90%. In this embodiment, the specific value of the preset charging power is not limited. The strategy here is to solve the problem of SOC deviation caused by the vehicle not being charged at the charging pile for a long time. When this condition is not met, the stacking is not allowed to avoid overcharging caused by the available energy feedback power of the battery being lower than the minimum net output power allowed by the fuel cell, and the combustion control battery system is immediately stopped after the stacking. The number of starts of the fuel cell system is limited, and frequent starts and stops will reduce reliability and service life.

[0074] It should be noted that energy regeneration power refers to the power that the battery can receive during the energy regeneration process. When the car slows down or brakes, the vehicle's kinetic energy is converted into electrical energy by the motor and then stored back in the battery. The BMS available energy regeneration power specifically refers to the maximum power that the battery can accept in its current state without exceeding the battery's charging limit or causing the battery to overheat. The BMS will evaluate this power based on the battery's current temperature, SOC and other parameters.

[0075] When the vehicle is decelerating or braking, the motor converts the vehicle's kinetic energy into electrical energy, a process called energy recovery or regenerative braking. The motor energy recovery power refers to the electrical energy power generated by the motor during the energy recovery process. This depends on the vehicle's deceleration, the efficiency of the motor and the current state of the battery.

[0076] Step S20, when it is detected that the fuel cell meets the stacking condition, receiving the stack operation status sent by the fuel cell control unit;

[0077] It should be noted that the stack operation status indicates the stack system operation status, which includes but is not limited to the ready state (ready), the starting state, the power-on self-test state and the operating state. The ready state indicates that the stack is in a ready state, has completed the self-test, and the stack is ready to receive the start-up command. The starting state indicates that the stack is in the process of starting, and may be heating to the operating temperature, building pressure, or executing other startup procedures. This stage is a transitional state, indicating that the stack has not been fully started, but is in progress. The power-on self-test state indicates that the stack is performing a self-check before starting. This stage may include checking electrical connections, fluid lines, sensor readings, etc. to ensure that all components are in normal condition and ready for the next start. The operating state indicates that the stack is currently in normal operation and is generating electrical energy. This is the state after the stack is successfully started, which means that the stack has completed the startup process and all system parameters are within the normal working range.

[0078] It is understandable that when it is detected that the fuel cell meets the stacking conditions, a stacking start instruction is sent to the FCU, and the FCU coordinates the various controllers of the fuel cell system to complete the stacking process. However, when the fuel cell does not meet the stacking conditions, the VCU sends a stacking stop instruction to the FCU, and returns to the detection step to repeatedly detect whether the stacking conditions are met.

[0079] Step S30, starting up the fuel cell stack according to the fuel cell stack operation state, and detecting whether the fuel cell stack meets the shutdown condition;

[0080] It can be understood that starting the fuel cell stack according to the stack operation status means that the VCU receives the stack system operation status (FCU_Sts) from the FCU in real time, and determines whether the stack is successful through FCU_Sts. If successful, the whole vehicle enters the fuel-electric mode. FCU_Sts=0 indicates the ready state (ready), FCU_Sts=1 indicates the starting state, FCU_Sts=7 indicates the power-on self-test state, and FCU_Sts=2 indicates the running state.

[0081] In addition, it can be understood that detecting whether the fuel cell meets the shutdown condition means that during and after the stacking process, it is possible to detect in real time whether the fuel cell meets the shutdown condition, and then shut down the stack in time.

[0082] In a feasible implementation, step S30 may include steps A31 to A33:

[0083] Step A31, when the stack operation state is the first operation state, the second operation state and the third operation state, sending a stack start instruction to the fuel cell control unit so that the fuel cell control unit feeds back a new stack operation state, and recording the instruction sending time;

[0084] It should be noted that the first operating state, the second operating state and the third operating state represent a ready state, a starting state and a power-on self-test state respectively.

[0085] It can be understood that sending a stacking instruction to the fuel cell control unit means that when the VCU receives any of the above states fed back by the FCU, it will send a stacking instruction to the FCU to try to start the stack to the operating state again. After the FCU receives the stacking instruction, the FCU will restart the stacking or continue to start the stacking, and feed back the new operating state to the VCU so that the VCU can understand whether the stack is successfully started.

[0086] In addition, it can be understood that recording the instruction sending time means that the VCU records the time when the stacking instruction is sent. This time point is used for subsequent monitoring and diagnosis. In particular, if the expected operating status update is not received within the predetermined time, the VCU may need to take further measures.

[0087] Step A32, obtaining the instruction sending time period according to the instruction sending time;

[0088] It should be noted that the instruction sending time period refers to the time period from sending the stack starting instruction to the time when the fuel cell control unit returns to a certain operating state, such as a stable operating state.

[0089] It is understandable that when the VCU sends a stacking instruction to the FCU, it records the time when the instruction was sent. This can be achieved through a timestamp, which marks the specific date and time when the instruction was sent. By comparing the current time with the instruction sending time, the VCU calculates the time period after the instruction was sent. This time period is used to evaluate whether the battery stack startup process is within the normal time range. If the difference between the current time and the instruction sending time (i.e., the time period) exceeds the preset time period, but the battery stack still does not reach the expected operating state, the VCU may judge that the stacking has failed or been delayed, and take corresponding measures, such as reissuing the instruction, sending a fault diagnosis instruction, or recording fault information.

[0090] Step A33, when the instruction sending time period is less than the preset sending time period and the new stack operating state is the second operating state or the fourth operating state, send a stack start instruction to the fuel cell control unit so that the fuel cell control unit starts the fuel cell stack according to the stack start instruction.

[0091] It should be noted that the preset sending time period is a time period preset according to the startup characteristics of the battery stack, and is used to evaluate whether the battery stack responds to the stacking instruction within a reasonable time. In this embodiment, the preset sending time period is 60 seconds.

[0092] It can be understood that the instruction sending time period being less than the preset sending time period means that the VCU will compare the instruction sending time period with the preset sending time period to determine whether the battery stack responds to the stacking instruction within a reasonable time.

[0093] In addition, it is understandable that, if a new battery stack operating status is received within the preset sending time period, and the new battery stack operating status is in the starting state or the running state, the VCU continues to send the battery stack start command to the FCU, and the stack is successfully started. If this condition is not met, the VCU sends the battery stack shutdown command to the FCU to enter the stack shutdown process, and the stack startup process ends if the stack startup fails.

[0094] Reference Figure 2 , Figure 2This is a schematic diagram of the stacking process of the first embodiment of the fuel cell start-stop stack control method for a hydrogen fuel vehicle of the present application, as shown in FIG. Figure 2 As shown:

[0095] After the start, the key is powered on, the VCU wakes up, and the high-voltage process of pure electric driving is executed. The VCU wakes up the FCU and HIMS through the low-voltage relay. The FCU wakes up and performs the pre-stack preparation work. The FCU receives the battery stack control status instruction (VCU_cmdFCu) from the VCU. After the FCU is started, it can send the FCU operation status message (FCU_RuSts) with ID 0x18FFA1D1, and also send the battery stack system operation status (FCU_Sts). When the main negative relay is closed, the main positive relay is closed, and the auxiliary drive relay is closed, the vehicle is ready for driving. If none of them is closed, the VCU is woken up again and the high-voltage process of pure electric driving is executed. After the vehicle is ready, that is, VCU_ReadyStatus is equal to 1, which means that the high-voltage power-on of pure electric driving is completed. When it is determined whether the SOC is less than 80%, the EV switch is invalid, the FCU communication is not exceeded, and the BMS allows the charging power to be greater than the set value, the VCU enters the fuel-electric management mode. Send VCU_cmdFCU=0 to shut down the fuel cell stack and initialize the VCU demand power, that is, VCU_DemandPower=the minimum net output power allowed by the fuel cell. When fcuSts is equal to 2, the VCU stacking is completed and VCU_cmdFCU=1 is sent to start the fuel cell stack. And the required power of the whole vehicle is assigned. At this time, the stacking is completed and the fuel-electricity mode is entered. When fcuSts is equal to 0 or equal to 1 or equal to 7, send VCU_cmdFCU=1 to start the fuel cell stack. If the instruction that fcuSts is equal to 2 is received within 60 seconds, the VCU stacking is completed. When fcuSts is not equal to 0 and not equal to 1 and not equal to 2 and not equal to 7, the stacking is completed and the VCU controls to shut down the fuel cell stack. And send VCU_cmdFCU=0 to shut down the fuel cell stack and assign VCU_DemandPower=0.

[0096] In a feasible implementation manner, step S30 may further include steps B31 to B32:

[0097] Step B31, obtaining the switch state of the vehicle electric vehicle mode, the battery state of charge, the preset state of charge, the communication state of the fuel cell control unit, the communication state retention time, and the charging power of the battery management system and the preset charging power;

[0098] It should be noted that the communication status holding time refers to how long the communication status between the FCU and the VCU lasts. If the communication times out or lasts too long, it may indicate that there is a problem with the system.

[0099] Step B32, determining that the fuel cell meets the shutdown conditions when the vehicle is in a non-high-voltage power-on state, the switch state is in a valid state, the battery charge state is greater than or equal to the preset charge state, the charging power is less than the preset charging power, the communication state is the preset communication state and the communication state is maintained for a time greater than the preset communication time, and the stack operating state is not at least one of the second operating state, the third operating state, and the fourth operating state.

[0100] It should be noted that the preset communication time refers to the time during which the good communication state between the FCU and the VCU (not a communication timeout) has lasted. In the present embodiment, the preset communication time is 60 seconds.

[0101] It can be understood that the vehicle is in a non-high-voltage power-on state, which means that the vehicle's high-voltage system is not activated, that is, the vehicle may have stopped or is not ready to drive. The switch state is in a valid state, which means that the EV switch is in a valid state, that is, the vehicle needs to enter the pure electric mode. The charging power is less than the preset charging power, which means that the battery SOC is ≥ 80%.

[0102] The charging power less than the preset charging power indicates that the BMS allows the charging power, that is, the BMS available energy feedback power - the motor energy feedback power < the minimum net output power allowed by the fuel cell. The strategy here is to solve the SOC deviation problem caused by the vehicle not being charged at the charging station for a long time. When the battery SOC is still less than 80%, but its actual available energy feedback power is lower than the minimum net output power allowed by the fuel cell, the VCU control needs to shut down the fuel cell system in advance to avoid the power battery overcharging and reporting serious faults, which will cause unnecessary high voltage of the whole vehicle. The VCU demand power (VCU_DemandPower) is calculated based on the BMS available charging power, the vehicle drive system and the power required by the high-voltage accessories. The FCU receives the VCU power request and executes it as required.

[0103] The communication status is the preset communication status, which means that the communication between the fuel cell control unit (FCU) and the vehicle control unit (VCU) is in the preset state, which indicates that the communication system is normal. The communication status is maintained for a time greater than the preset communication time, which means that the communication between the VCU and the FCU is continuous and normal during this 60 seconds or longer period.

[0104] The stack operation state is not the second operation state, the third operation state and the fourth operation state. The stack operation state is not the starting state, the power-on self-test state and the operation state.

[0105] It can be understood that if at least one of the above conditions is met, it is determined that the fuel cell meets the shutdown condition, that is, the fuel cell can be safely stopped.

[0106] Step S40, when it is detected that the fuel cell meets the shutdown condition, receiving the high voltage power-off permission state sent by the fuel cell control unit;

[0107] It should be noted that the high voltage power-off permission state (FCU_HVShutdownAllow) is a signal sent by the FCU to indicate whether the system is allowed to disconnect the high voltage power supply. This state is usually determined based on system safety and operational requirements. When FCU_HVShutdownAllow is 0, it means that the power can be disconnected.

[0108] Step S50, shutting down the fuel cell according to the shutdown condition and the high voltage power-off permission state.

[0109] It should be noted that once the fuel cell shutdown conditions are met and the FCU confirms that the high voltage power outage is allowed, the VCU will send a shutdown instruction to the FCU, instructing it to start the shutdown process.

[0110] In a feasible implementation manner, step S50 may further include step A51:

[0111] Step A51, when the shutdown condition is that the communication state is a preset communication state and the communication state is maintained for a time greater than the preset communication time, a shutdown instruction is sent to the fuel cell control unit according to the high-voltage power-off permission state, so that the fuel cell control unit controls the vehicle to power off the high voltage according to the shutdown instruction and completes the shutdown operation.

[0112] It can be understood that when the shutdown condition is that the communication state is the preset communication state and the communication state is maintained for a time greater than the preset communication time, it means that if the FCU is not communicating for a timeout, then when the high-voltage power-off permission state is power-off permission, the VCU continues to send a shutdown command to the FCU, and the VCU allows the high voltage to be lowered internally, and the shutdown is completed.

[0113] The present embodiment provides a fuel cell start-stop stack control method for a hydrogen fuel cell vehicle, which solves the problem that hydrogen fuel cell vehicles cannot accurately control the start and stop of fuel cells under different operating conditions through technical means of comprehensive monitoring and intelligent judgment of key parameters such as the vehicle's high-voltage power-on status, the status of the fuel cell system, the battery's state of charge, the charging power, and the communication status. It optimizes the start-up and shutdown operations of the fuel cell while ensuring system safety, improves the reliability and service life of the fuel cell system, and avoids the problem of overcharging of the power battery or frequent start-stopping of the fuel cell system due to SOC deviation, thereby achieving the beneficial effect of improving the energy efficiency and performance of the entire vehicle.

[0114] Based on the first embodiment of the present application, in the second embodiment of the present application, the same or similar contents as those in the above-mentioned embodiment 1 can be referred to the above introduction, and will not be repeated in the following. Figure 3 The step S50 of the fuel cell start-stop stack control method for a hydrogen fuel vehicle includes steps S51 to S53:

[0115] Step S51, when the shutdown condition is that the vehicle is in a non-high-voltage powered-on state, obtaining a high-voltage powered-off state of the vehicle;

[0116] It should be noted that the vehicle is in a non-high-voltage power-on state, which means that the vehicle's high-voltage system is not in an activated state, that is, the vehicle may have stopped or is not in a state of preparing to drive. If the shutdown condition is that the vehicle is in a non-high-voltage power-on state, proceed to the subsequent steps. Obtaining the high-voltage power-off state means that it is necessary to confirm whether the vehicle is already in a high-voltage power-off state.

[0117] Step S52, obtaining a preset high voltage permission state receiving time according to the high voltage power-off permission state;

[0118] It should be noted that the preset high-voltage permission state receiving time is a pre-set time value used to determine how long the fuel cell system should wait before performing a power-off operation after receiving a high-voltage power-off permission state signal.

[0119] Step S53 , shutting down the fuel cell stack according to the high voltage power-down state and the preset high voltage permission state receiving time.

[0120] It is understandable that the specific operation of stopping the stack needs to be determined based on the current high voltage power-off state and the preset high voltage allowable state receiving time.

[0121] In a feasible implementation, step S53 may include steps S531 to S533:

[0122] Step S531, obtaining a first preset receiving time and a second preset receiving time, wherein the first preset receiving time is less than the second preset receiving time;

[0123] It should be noted that the first preset receiving time is a preset time value, which is used to determine how long the fuel cell system should wait to perform the shutdown operation after the high-voltage power-off permission state signal sent by the fuel cell control unit (FCU). This time value is usually set shorter to enable a quick response when the state allows. The second preset receiving time has the same function as the first preset receiving time, but is longer than the first preset receiving time. In this embodiment, the first preset receiving time is 300s and the second preset receiving time is 600s.

[0124] Step S532, when the high-voltage power-off state is non-high-voltage power-off and the preset high-voltage permission state reception time is greater than the first preset reception time, sending a shutdown instruction to the fuel cell control unit, so that the fuel cell control unit completes the fuel cell shutdown according to the shutdown instruction;

[0125] It can be understood that when the high-voltage power-off state is non-high-voltage power-off and the preset high-voltage allowed state reception time is greater than the first preset reception time, it means that the vehicle is in a non-high-voltage state, and the VCU has not received FCU_HVShutdownAllow==0 (power off allowed) within 300s.

[0126] In addition, it is understandable that when it is judged that this is the case, the VCU continues to send the shutdown command of the fuel cell stack to the FCU after 300 seconds, and the high voltage is allowed to be lowered inside the VCU, and the shutdown of the stack is completed.

[0127] Step S533, when the high voltage power-off state is high voltage power-off and the preset high voltage permission state receiving time is greater than the second preset receiving time, the high voltage circuit between the fuel cell and the vehicle is cut off to complete the fuel cell shutdown.

[0128] It can be understood that the high voltage power-off state is high voltage power-off and the preset high voltage allowed state reception time is greater than the second preset reception time, indicating that the vehicle is in the low voltage state and FCU_HVShutdownAllow==0 (power off allowed) is not received within 600s.

[0129] It should be noted that a DCDC converter (Direct Current to Direct Current converter) is a power conversion device that is used to convert direct current at one voltage level into direct current at another voltage level. The DCDC converter plays a vital role in the fuel cell system, allowing the system to work properly under different voltage requirements. DCDC enable refers to the working state of activating or starting the DCDC converter. In the enabled state, the DCDC converter will begin to perform its power conversion function.

[0130] In addition, it is understandable that when it is judged that this is the case, after 600s, the VCU continues to send the stack shutdown command to the FCU. The VCU allows the high voltage to be lowered, that is, the vehicle is allowed to disconnect the main positive relay, cutting off the fuel cell system from the vehicle's high-voltage circuit. The DCDC enable is then stopped, the auxiliary drive relay is disconnected, the main negative relay is disconnected, and the high-voltage power is turned off. After that, the VCU disconnects the FCU and HMS wake-up power supplies by controlling the low-voltage relay to complete the stack shutdown.

[0131] It is understandable that, by disconnecting the main positive relay after the FCU high voltage power-off is allowed, it is possible to avoid forcibly disconnecting the high voltage output circuit of the stack when the FCU still has power output, thereby damaging the stack system. By stopping the DCDC enable after the FCU low voltage power-off is allowed, it is possible to avoid the battery feeding caused by the long-term purge of the FCU.

[0132] Reference Figure 4 , Figure 4 This is a schematic diagram of the shutdown process of the second embodiment of the fuel cell start-stop control method for a hydrogen fuel vehicle of the present application. Figure 4 As shown:

[0133] After the VCU stack startup is completed, the fuel cell mode sends VCU_cmdFCU=1 to start the stack. After the FCU is started, it continuously sends the FCU operation status message with ID 0x18FFA1D1, which contains the operation status of the stack system, namely FCU_Sts. Determine whether FCU Sts is not equal to 0 or not equal to 2 or not equal to 7, and whether VCU_ReadyStatus is equal to 0, and whether ReadyStatus is equal to 1 and the EV switch is valid, whether the FCU communication timeout exceeds 60s, and whether the BMS allows the charging power to be less than the minimum net output power allowed by the fuel cell battery. If one of the above judgment conditions is met, enter the step of shutting down the stack. The VCU controls the shutdown of the stack and sends VCU_cmdFCU=0 to shut down the stack, and assigns VCU_DemandPower to 0. After receiving the high-voltage power-off permission FCU_HVShutdowA1low sent by FCU, determine whether the FCU is not in communication timeout and receives the FCU_HVShutdowA1low signal, determine whether the signal reception time in the non-high-voltage state exceeds 300s, and determine whether the signal reception time in the high-voltage state exceeds 600s. When any of the above conditions is met, enter the VCU internal high-voltage state.

[0134] This embodiment provides a fuel cell start-stop stack control method for a hydrogen fuel vehicle, which obtains the high-voltage power-off state of the vehicle in a non-high-voltage power-on state, and determines the specific timing of executing the shutdown according to the preset high-voltage permission state reception time, thereby realizing a delay control of waiting for 300 seconds in a non-high-voltage state or waiting for 600 seconds in a high-voltage state, thereby ensuring that the high-voltage circuit is safely cut off after the fuel cell system completes all necessary operations, avoiding damage to the stack system, and reducing the battery feeding problem caused by long-term purge of the FCU. The problem of ensuring that the fuel cell stops working safely and efficiently before the high-voltage system is powered off is solved, and the beneficial effect of improving the reliability of the fuel cell system and extending its service life is achieved. If the whole vehicle is not in a low-voltage state, the stack is shut down. If the whole vehicle is in a low-voltage state, the whole vehicle disconnects the main positive relay and cuts off the fuel-electricity and the high-voltage circuit of the whole vehicle. The VCU exits the fuel-electricity management mode, sends VCUcmdFCU=0, and assigns VCU DemandPower equal to 0. Stop DCDC enable, disconnect the auxiliary drive relay, disconnect the main negative relay, and the high-voltage power-off is completed. After the vehicle is powered off at low voltage, the VCU disconnects the FCU and HMS wake-up sources through the low-voltage relay, the VCU goes into sleep mode, and the shutdown of the stack is completed.

[0135] It should be noted that the above examples are only used to understand the present application and do not constitute a limitation on the fuel cell start-stop stack control method for the hydrogen fuel vehicle of the present application. More simple transformations based on this technical concept are all within the scope of protection of the present application.

[0136] This application also provides a fuel cell start-stop stack control device for a hydrogen fuel vehicle, please refer to Figure 5 , the fuel cell start-stop stack control device of the hydrogen fuel vehicle comprises:

[0137] The power-on module 10 is used to control the high voltage power-on of the vehicle and detect whether the fuel cell meets the stacking conditions;

[0138] The receiving module 20 is used to receive the stack operation status sent by the fuel cell control unit when it is detected that the fuel cell meets the stack starting condition;

[0139] A stacking module 30 is used to stack the fuel cell according to the operating state of the fuel cell stack and detect whether the fuel cell meets the shutdown condition;

[0140] The receiving module 20 is further used to receive the high voltage power-off permission state sent by the fuel cell control unit when it is detected that the fuel cell meets the shutdown condition;

[0141] The shutdown module 40 is used to shut down the fuel cell according to the shutdown condition and the high voltage power-off permission state.

[0142] The fuel cell start-stop stack control device for a hydrogen fuel vehicle provided in the present application adopts the fuel cell start-stop stack control method for a hydrogen fuel vehicle in the above-mentioned embodiment, which can solve the technical problem of inaccuracy and insecurity caused by the hydrogen fuel cell vehicle start-stop control strategy relying only on the power battery SOC value. Compared with the prior art, the beneficial effects of the fuel cell start-stop stack control device for a hydrogen fuel vehicle provided in the present application are the same as the beneficial effects of the fuel cell start-stop stack control method for a hydrogen fuel vehicle provided in the above-mentioned embodiment, and the other technical features in the fuel cell start-stop stack control device for a hydrogen fuel vehicle are the same as the features disclosed in the above-mentioned embodiment method, which will not be repeated here.

[0143] In one embodiment, the power-on module 10 is also used to control the high-voltage power-on of the vehicle; obtain the switch state of the vehicle's electric vehicle mode, the battery charge state, the preset charge state, the communication state of the fuel cell control unit, and the charging power of the battery management system and the preset charging power; when the switch state is invalid, the battery charge state is less than the preset charge state, the communication state is the preset communication state, and the charging power is greater than the preset charging power, it is determined that the fuel cell meets the stacking conditions.

[0144] In one embodiment, the stacking module 30 is also used to send a stacking instruction to the fuel cell control unit when the stack operating state is the first operating state, the second operating state, and the third operating state, so that the fuel cell control unit feeds back the new stack operating state and records the instruction sending time; obtains the instruction sending time period according to the instruction sending time; and sends a stack start instruction to the fuel cell control unit when the instruction sending time period is less than the preset sending time period and the new stack operating state is the second operating state or the fourth operating state, so that the fuel cell control unit stacks the fuel cells according to the stack start instruction.

[0145] In one embodiment, the stacking module 30 is also used to obtain the switch state of the vehicle's electric vehicle mode, the battery charge state, the preset charge state, the communication state of the fuel cell control unit, the communication state retention time, and the charging power of the battery management system and the preset charging power; when the vehicle is in a non-high-voltage power-on state, the switch state is a valid state, the battery charge state is greater than or equal to the preset charge state, the charging power is less than the preset charging power, the communication state is a preset communication state and the communication state retention time is greater than the preset communication time, and the stack operating state is not at least one of the second operating state, the third operating state, and the fourth operating state, it is determined that the fuel cell meets the shutdown condition.

[0146] In one embodiment, the shutdown module 40 is further used to send a shutdown instruction to the fuel cell control unit according to the high-voltage power-off permission state when the shutdown condition is that the communication state is a preset communication state and the communication state is maintained for a time greater than the preset communication time, so that the fuel cell control unit controls the vehicle to power off the high voltage according to the shutdown instruction and completes the shutdown operation.

[0147] In one embodiment, the shutdown module 40 is further used to obtain the high-voltage power-off state of the vehicle when the shutdown condition is that the vehicle is in a non-high-voltage power-on state; obtain a preset high-voltage permission state receiving time according to the high-voltage power-off permission state; and shut down the fuel cell according to the high-voltage power-off state and the preset high-voltage permission state receiving time.

[0148] In one embodiment, the shutdown module 40 is also used to obtain a first preset receiving time and a second preset receiving time, wherein the first preset receiving time is less than the second preset receiving time; when the high-voltage power-off state is non-high-voltage power-off and the preset high-voltage allowable state receiving time is greater than the first preset receiving time, a shutdown instruction is sent to the fuel cell control unit so that the fuel cell control unit completes the fuel cell shutdown according to the shutdown instruction; when the high-voltage power-off state is high-voltage power-off and the preset high-voltage allowable state receiving time is greater than the second preset receiving time, the high-voltage circuit between the fuel cell and the vehicle is cut off to complete the fuel cell shutdown.

[0149] The present application provides a fuel cell start-stop stack control device for a hydrogen fuel vehicle, and the fuel cell start-stop stack control device for a hydrogen fuel vehicle includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the fuel cell start-stop stack control method for a hydrogen fuel vehicle in the above-mentioned embodiment one.

[0150] Reference below Figure 6 , which shows a schematic diagram of the structure of a fuel cell start-stop stack control device for a hydrogen fuel vehicle suitable for implementing an embodiment of the present application. The fuel cell start-stop stack control device for a hydrogen fuel vehicle in the embodiment of the present application may include but is not limited to mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. Figure 6The fuel cell start-stop stack control device for a hydrogen fuel vehicle shown is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0151] like Figure 6 As shown, the fuel cell start-stop stack control device of the hydrogen fuel vehicle may include a processing device 1001 (such as a central processing unit, a graphics processor, etc.), which can perform various appropriate actions and processes according to the program stored in the read-only memory (ROM: Read Only Memory) 1002 or the program loaded from the storage device 1003 to the random access memory (RAM: Random Access Memory) 1004. In RAM1004, various programs and data required for the operation of the fuel cell start-stop stack control device of the hydrogen fuel vehicle are also stored. The processing device 1001, ROM1002 and RAM1004 are connected to each other through a bus 1005. The input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems can be connected to the I / O interface 1006: input devices 1007 including, for example, a touch screen, a touchpad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; output devices 1008 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; storage devices 1003 including, for example, a magnetic tape, a hard disk, etc.; and communication devices 1009. The communication device 1009 can allow the fuel cell start-stop stack control device of a hydrogen fuel vehicle to communicate wirelessly or wired with other devices to exchange data. Although the figure shows a fuel cell start-stop stack control device of a hydrogen fuel vehicle with various systems, it should be understood that it is not required to implement or have all the systems shown. More or fewer systems may be implemented or provided alternatively.

[0152] In particular, according to the embodiments disclosed in the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication device, or installed from a storage device 1003, or installed from a ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are executed.

[0153] The fuel cell start-stop stack control device for hydrogen fuel vehicles provided in the present application adopts the fuel cell start-stop stack control method for hydrogen fuel vehicles in the above-mentioned embodiment, which can solve the inaccurate and unsafe technical problems caused by the hydrogen fuel cell vehicle start-stop control strategy relying only on the power battery SOC value. Compared with the prior art, the beneficial effects of the fuel cell start-stop stack control device for hydrogen fuel vehicles provided in the present application are the same as the beneficial effects of the fuel cell start-stop stack control method for hydrogen fuel vehicles provided in the above-mentioned embodiment, and the other technical features in the fuel cell start-stop stack control device for hydrogen fuel vehicles are the same as the features disclosed in the method of the previous embodiment, which will not be repeated here.

[0154] It should be understood that the various parts disclosed in this application can be implemented by hardware, software, firmware or a combination thereof. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0155] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0156] The present application provides a computer-readable storage medium having computer-readable program instructions (ie, computer programs) stored thereon, and the computer-readable program instructions are used to execute the fuel cell start-stop stack control method for a hydrogen fuel vehicle in the above-mentioned embodiment.

[0157] The computer-readable storage medium provided in the present application may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, systems or devices, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, system or device. The program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination of the above.

[0158] The computer-readable storage medium may be included in the fuel cell start-stop stack control device of the hydrogen fuel vehicle; or may exist independently without being assembled into the fuel cell start-stop stack control device of the hydrogen fuel vehicle.

[0159] The above-mentioned computer-readable storage medium carries one or more programs. When the above-mentioned one or more programs are executed by the fuel cell start-stop stack control device of the hydrogen fuel vehicle, the fuel cell start-stop stack control device of the hydrogen fuel vehicle: controls the vehicle high voltage power-on, and detects whether the fuel cell meets the stack starting conditions; when it is detected that the fuel cell meets the stack starting conditions, receives the stack operation status sent by the fuel cell control unit; starts the fuel cell according to the stack operation status, and detects whether the fuel cell meets the stack stopping conditions; when it is detected that the fuel cell meets the stack stopping conditions, receives the high voltage power-off permission status sent by the fuel cell control unit; and shuts down the fuel cell according to the stack stopping conditions and the high voltage power-off permission status.

[0160] Computer program code for performing the operations of the present application may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0161] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present application. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0162] The modules involved in the embodiments described in this application may be implemented by software or hardware, wherein the name of the module does not constitute a limitation on the unit itself in some cases.

[0163] The readable storage medium provided in this application is a computer-readable storage medium, which stores computer-readable program instructions (i.e., computer programs) for executing the above-mentioned hydrogen fuel cell vehicle start-stop stack control method, which can solve the inaccurate and unsafe technical problems caused by the hydrogen fuel cell vehicle start-stop control strategy relying only on the power battery SOC value. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided in this application are the same as the beneficial effects of the hydrogen fuel cell vehicle start-stop stack control method provided in the above-mentioned embodiment, and will not be repeated here.

[0164] The present application also provides a computer program product, including a computer program, which, when executed by a processor, implements the steps of the fuel cell start-stop stack control method for a hydrogen fuel vehicle as described above.

[0165] The computer program product provided by the present application can solve the technical problem that the start-stop control strategy of hydrogen fuel cell vehicles only relies on the SOC value of the power battery, which is inaccurate and unsafe. Compared with the prior art, the beneficial effects of the computer program product provided by the present application are the same as the beneficial effects of the fuel cell start-stop stack control method for hydrogen fuel vehicles provided in the above embodiment, and will not be repeated here.

[0166] The above descriptions are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A method for controlling the start and stop of a fuel cell stack of a hydrogen fuel vehicle, characterized in that: The method comprises: Control the vehicle's high voltage power supply and detect whether the fuel cell meets the stacking conditions; When it is detected that the fuel cell meets the stack starting condition, receiving the stack operation status sent by the fuel cell control unit; Starting up the fuel cell stack according to the stack operation status, and detecting whether the fuel cell stack meets the shutdown condition; When it is detected that the fuel cell meets the shutdown condition, receiving the high voltage power-off permission state sent by the fuel cell control unit; The fuel cell is shut down according to the shutdown condition and the high voltage power-off permission state.

2. The method according to claim 1, wherein The steps of controlling the vehicle high voltage power-up and detecting whether the fuel cell meets the stacking conditions include: Control vehicle high voltage power-up; Obtain the vehicle's electric vehicle mode switch status, battery state of charge, preset state of charge, fuel cell control unit communication status, and battery management system charging power and preset charging power; When the switch state is an invalid state, the battery state of charge is less than the preset state of charge, the communication state is a preset communication state, and the charging power is greater than a preset charging power, it is determined that the fuel cell meets the stacking condition.

3. The method according to claim 1, wherein The step of starting up the fuel cell stack according to the operating state of the fuel cell stack comprises: When the stack operating state is the first operating state, the second operating state, and the third operating state, sending a stack start instruction to the fuel cell control unit so that the fuel cell control unit feeds back the new stack operating state and records the time when the instruction is sent; Obtaining the instruction sending time period according to the instruction sending time; When the instruction sending time period is less than the preset sending time period and the new stack operating state is the second operating state or the fourth operating state, a stack start instruction is sent to the fuel cell control unit so that the fuel cell control unit starts the fuel cell stack according to the stack start instruction.

4. The method according to claim 1, wherein The step of detecting whether the fuel cell meets the shutdown condition comprises: Obtain the vehicle's electric vehicle mode switch status, battery state of charge, preset state of charge, fuel cell control unit communication status, communication state retention time, and battery management system charging power and preset charging power; When the vehicle is in a non-high-voltage power-on state, the switch state is in a valid state, the battery state of charge is greater than or equal to the preset state of charge, the charging power is less than the preset charging power, the communication state is a preset communication state and the communication state is maintained for a time greater than the preset communication time, and the stack operating state is not at least one of the second operating state, the third operating state, and the fourth operating state, it is determined that the fuel cell meets the shutdown conditions.

5. The method according to claim 1, wherein The step of shutting down the fuel cell according to the shutdown condition and the high voltage power-off permission state comprises: When the shutdown condition is that the communication state is a preset communication state and the communication state is maintained for longer than the preset communication time, a shutdown instruction is sent to the fuel cell control unit according to the high-voltage power-off permission state, so that the fuel cell control unit controls the vehicle to power off the high voltage according to the shutdown instruction and completes the shutdown operation.

6. The method according to claim 1, wherein The step of shutting down the fuel cell according to the shutdown condition and the high voltage power-off permission state further includes: When the shutdown condition is that the vehicle is in a non-high-voltage powered state, obtaining a high-voltage powered-off state of the vehicle; According to the high-voltage power-off permission state, a preset high-voltage permission state reception time is obtained; The fuel cell stack is shut down according to the high-voltage power-off state and the preset high-voltage permission state reception time.

7. The method according to claim 6, wherein The step of shutting down the fuel cell stack according to the high-voltage power-off state and the high-voltage enabling state receiving time comprises: Obtain a first preset receiving time and a second preset receiving time, wherein the first preset receiving time is less than the second preset receiving time; When the high-voltage power-off state is non-high-voltage power-off and the preset high-voltage permission state reception time is greater than the first preset reception time, sending a shutdown instruction to the fuel cell control unit, so that the fuel cell control unit completes the fuel cell shutdown according to the shutdown instruction; When the high-voltage power-off state is high-voltage power-off and the preset high-voltage permission state reception time is greater than the second preset reception time, the high-voltage circuit between the fuel cell and the vehicle is cut off to complete the fuel cell shutdown.

8. A fuel cell start-stop stack control device for a hydrogen fuel vehicle, characterized in that: The device comprises: The power-on module is used to control the vehicle's high-voltage power supply and detect whether the fuel cell meets the stacking conditions; A receiving module, configured to receive a stack operation status sent by a fuel cell control unit when detecting that the fuel cell meets a stack start-up condition; A stacking module, configured to stack the fuel cell according to the operating state of the fuel cell stack and detect whether the fuel cell stack meets the shutdown condition; The receiving module is further configured to receive a high voltage power-off permission status sent by the fuel cell control unit when it is detected that the fuel cell meets a shutdown condition; A shutdown module is used to shut down the fuel cell according to the shutdown condition and the high-voltage power-off permission state.

9. A fuel cell start-stop stack control device for a hydrogen fuel vehicle, characterized in that: The device includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program is configured to implement the steps of the fuel cell start-stop stack control method for a hydrogen fuel vehicle according to any one of claims 1 to 7.

10. A storage medium, characterized in that: The storage medium is a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the fuel cell start-stop stack control method for a hydrogen fuel vehicle according to any one of claims 1 to 7 are implemented.

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