Startup control method, device, equipment and medium for hydrogen fuel cell stack

Abstract

The present application discloses a method, device, equipment and medium for starting control of a hydrogen fuel cell stack, and relates to the technical field of starting control of multiple hydrogen fuel cell stacks. The method includes: determining the starting priority of each hydrogen fuel cell stack corresponding to the vehicle; starting the current hydrogen fuel cell stack; during the starting process of the current hydrogen fuel cell stack, determining that the net power generation of the current hydrogen fuel cell stack is greater than the preset starting threshold within a preset duration, and if the starting conditions are still met during the starting process, starting the next hydrogen fuel cell stack until all hydrogen fuel cell stacks are started. The present application is used to solve a series of problems in the prior art such as starting failure, false alarm of low voltage fault and system voltage shock when multiple hydrogen stacks are started at the same time, and by starting multiple hydrogen stacks in sequence, the successful starting of multiple hydrogen stacks is achieved while reducing the impact on the vehicle system.

Description

Technical Field

[0001] The present application relates to the technical field of startup control of multiple hydrogen fuel cell stacks, and in particular to a startup control method, device, equipment and medium for a hydrogen fuel cell stack. Background Art

[0002] In hydrogen-electric hybrid vehicles, a single hydrogen fuel cell stack (hydrogen stack) cannot meet the vehicle's power requirements, and multiple hydrogen stacks are required to work together to meet the vehicle's power requirements.

[0003] In the prior art, the distribution problem of the power generation of multiple hydrogen stacks is considered, but the problem of coordinated starting of multiple hydrogen stacks is not considered. The starting strategy of multiple hydrogen stacks starting simultaneously is adopted to start multiple hydrogen stacks. However, when multiple hydrogen stacks are started simultaneously, multiple high-voltage components of the vehicle, such as air compressors, water pumps, proportional valves and other loads, will suddenly start working, resulting in instantaneous high-power output of the battery, and even exceeding the discharge capacity of the power battery at low power, causing the start-up of multiple hydrogen stacks to fail. In addition, when multiple hydrogen stacks are started simultaneously, the large current reduces the output voltage of the power battery, resulting in a false alarm of a low voltage fault. Moreover, when multiple hydrogen stacks start to generate electricity at the same time, the output power is large, which will have an impact on the voltage of the entire vehicle system. Summary of the invention

[0004] In response to the above-mentioned problems and technical needs, the applicant has proposed a startup control method, device, equipment and medium for a hydrogen fuel cell stack, so as to solve a series of problems in the prior art such as startup failure, false alarm of low voltage fault and system voltage shock when multiple hydrogen stacks are started simultaneously. By starting multiple hydrogen stacks in sequence, the successful startup of multiple hydrogen stacks can be achieved while reducing the impact on the vehicle system.

[0005] The present application provides a method for starting a hydrogen fuel cell stack, the method comprising:

[0006] When it is determined that the vehicle is powered on, determining the startup priority of each hydrogen fuel cell stack corresponding to the vehicle, wherein the startup priority is obtained based on the operation and power generation time of each hydrogen fuel cell stack;

[0007] Upon receiving a stack start instruction and in the case that the current hydrogen fuel cell stack determined based on the start priority meets the start condition, start the current hydrogen fuel cell stack, wherein the start condition includes: there is no start failure in the current hydrogen fuel cell stack, the required power generation power of the current hydrogen fuel cell stack is greater than a first preset threshold, the remaining power of the vehicle's power battery is greater than a second preset threshold, the remaining power is less than a third preset threshold, and the remaining amount of hydrogen in the current hydrogen fuel cell stack is greater than a fourth preset threshold;

[0008] During the startup of the current hydrogen fuel cell stack, if it is determined that the net power generated by the current hydrogen fuel cell stack is greater than a preset startup threshold within a preset duration, and if the startup conditions are still met during the startup process, the next hydrogen fuel cell stack is started until all hydrogen fuel cell stacks are started.

[0009] According to a startup control method for a hydrogen fuel cell stack according to an embodiment of the present application, the startup priority of each hydrogen fuel cell stack corresponding to a vehicle is determined, including:

[0010] Determine whether the current vehicle power-on is the first power-on;

[0011] In the case where it is determined that the current vehicle power-on is the first power-on, obtaining a preset initial startup priority, and determining the initial startup priority as the startup priority;

[0012] When it is determined that the current vehicle power-on is not the first power-on, the total operating and power generation time of each hydrogen fuel cell stack is obtained; the startup priority is determined based on the total operating and power generation time, wherein the total operating and power generation time is inversely proportional to the startup priority.

[0013] According to a startup control method for a hydrogen fuel cell stack according to an embodiment of the present application, the startup priority is determined based on the total duration of power generation operation, including:

[0014] Determine whether there is a same duration in the total running and power generation duration corresponding to the current vehicle power-on;

[0015] In the case where it is determined that there is no same duration for the current vehicle power-on, the priority of each hydrogen fuel cell stack is determined in sequence according to the total power generation time, to obtain the startup priority;

[0016] When it is determined that the current vehicle is powered on for the same duration, the previous startup priority corresponding to the last vehicle power-on is obtained; the candidate priority of each hydrogen fuel cell stack is determined in turn according to the total power generation duration; for hydrogen fuel cell stacks with the same duration, the candidate priority is adjusted based on the previous startup priority to obtain the startup priority;

[0017] Among them, for a hydrogen fuel cell stack of the same duration, the previous startup priority is consistent with the current startup priority.

[0018] According to a method for starting a hydrogen fuel cell stack according to an embodiment of the present application, after determining that the vehicle is powered on and determining the starting priority of each hydrogen fuel cell stack corresponding to the vehicle, the method further includes:

[0019] Obtain the vehicle's required power;

[0020] Determining the number of hydrogen fuel cell stacks to be started based on the minimum power generation of each hydrogen fuel cell stack and the required power of the entire vehicle;

[0021] Until all hydrogen fuel cell stacks are started, including:

[0022] Until the startup of the said number of hydrogen fuel cell stacks is completed.

[0023] According to a method for starting a hydrogen fuel cell stack according to an embodiment of the present application, after determining that the vehicle is powered on and determining the starting priority of each hydrogen fuel cell stack corresponding to the vehicle, the method further includes:

[0024] Obtaining threshold determination parameters, wherein the threshold determination parameters include: the vehicle's required power, the first maximum discharge power of the power battery, the required power generation power corresponding to each hydrogen fuel cell stack, and the second maximum discharge power corresponding to the hydrogen fuel cell stack;

[0025] In the case where it is determined that the threshold determination parameter meets the first determination condition, or in the case where it is determined that the threshold determination parameter meets the second determination condition, the second preset threshold is the preset start threshold corresponding to the current hydrogen fuel cell stack;

[0026] Wherein, the preset start threshold is pre-calibrated;

[0027] Wherein, the first determination condition includes: the difference between the vehicle required power and the first maximum discharge power is less than or equal to the second maximum discharge power; the second determination condition includes: the change rate of the required total power generation is less than or equal to the preset change rate;

[0028] Wherein, the total power generation required is equal to the sum of the power generation required;

[0029] When it is determined that the threshold determination parameters do not meet the first determination condition and do not meet the second determination condition, the final second preset threshold and the final preset start threshold are determined based on the difference between the preset vehicle demand power and the first maximum discharge power and the change rate of the required total power generation and the correspondence between the second preset threshold and the preset start threshold.

[0030] According to a startup control method for a hydrogen fuel cell stack according to an embodiment of the present application, the greater the difference between the vehicle's required power and the first maximum discharge power and the rate of change of the required total power generation, the greater the second preset threshold and the smaller the preset startup threshold.

[0031] According to a startup control method for a hydrogen fuel cell stack according to an embodiment of the present application, the startup priority of each hydrogen fuel cell stack corresponding to a vehicle is determined, including:

[0032] Determine whether the current vehicle power-on is the first power-on;

[0033] In the case where it is determined that the current vehicle power-on is the first power-on, obtaining a preset initial startup priority, and determining the initial startup priority as the startup priority;

[0034] When it is determined that the current vehicle power-on is not the first time, obtain the previous startup priority corresponding to the last time the vehicle was powered on, the hydrogen fuel cell stack that last generated electricity, and the last power generation time of each hydrogen fuel cell stack that last generated electricity; adjust the previous startup priority based on the size of the last power generation time to obtain the startup priority.

[0035] The embodiment of the present application also provides a startup control device for a hydrogen fuel cell stack, comprising:

[0036] A determination module, for determining the startup priority of each hydrogen fuel cell stack corresponding to the vehicle when it is determined that the vehicle is powered on, wherein the startup priority is obtained based on the operation and power generation time of each hydrogen fuel cell stack;

[0037] a first starting module, configured to start the current hydrogen fuel cell stack upon receiving a stack starting instruction and the current hydrogen fuel cell stack determined based on the starting priority meets the starting conditions, wherein the starting conditions include: the current hydrogen fuel cell stack does not have a starting fault, the required power generation power of the current hydrogen fuel cell stack is greater than a first preset threshold, the remaining power of the vehicle's power battery is greater than a second preset threshold, the remaining power is less than a third preset threshold, and the remaining amount of hydrogen in the current hydrogen fuel cell stack is greater than a fourth preset threshold;

[0038] The second starting module is used to determine during the startup of the current hydrogen fuel cell stack that the net power generated by the current hydrogen fuel cell stack is greater than a preset starting threshold within a preset duration, and if the starting conditions are still met during the startup process, start the next hydrogen fuel cell stack until all hydrogen fuel cell stacks are started.

[0039] An embodiment of the present application also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the steps of the startup control method for a hydrogen fuel cell stack as described in any one of the above items are implemented.

[0040] An embodiment of the present application also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the startup control method for a hydrogen fuel cell stack as described in any one of the above items.

[0041] The startup control method, device, equipment and medium of the hydrogen fuel cell stack provided in the embodiments of the present application determine the startup priority of each hydrogen fuel cell stack corresponding to the current time each time the vehicle is powered on, so as to start the hydrogen fuel cell stack based on the startup priority; when the stack startup instruction is received and the current hydrogen fuel cell stack determined based on the startup priority meets the startup conditions, the current hydrogen fuel cell stack is started; during the startup process of the current hydrogen fuel cell stack, it is determined that the net power generated by the current hydrogen fuel cell stack is greater than the preset startup threshold within a preset duration, and the startup conditions are still met during the startup process, the next hydrogen fuel cell stack is started until all hydrogen fuel cell stacks are started. The present application further performs pre-startup judgment and startup process judgment on each hydrogen fuel cell stack in turn based on the startup priority to ensure that the hydrogen fuel cell can be started safely and successfully, solving a series of problems in the prior art such as startup failure, false alarm of low voltage fault and system voltage shock when multiple hydrogen stacks are started at the same time, and achieving the purpose of successfully starting multiple hydrogen stacks while reducing the impact on the vehicle system. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] 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, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0043] Figure 1 It is a flow chart of a method for starting and controlling a hydrogen fuel cell stack provided in an embodiment of the present application;

[0044] Figure 2 This is a schematic diagram of the startup process of a hydrogen fuel cell stack provided in an embodiment of the present application;

[0045] Figure 3 It is a structural schematic diagram of a start-up control device for a hydrogen fuel cell stack provided in an embodiment of the present application;

[0046] Figure 4 It is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] The embodiment of the present application provides a method for starting and controlling a hydrogen fuel cell stack. The method can be applied to a hydrogen fuel cell controller. Some other descriptions in the embodiment of the present application are for illustrative purposes only and are not intended to limit the scope of protection of the present application. They will not be described one by one in the following. The specific implementation of the method is as follows Figure 1 As shown:

[0049] Step 101, when it is determined that the vehicle is powered on, determine the startup priority of each hydrogen fuel cell stack corresponding to the vehicle.

[0050] Among them, the startup priority is obtained based on the operating power generation time of each hydrogen fuel cell stack.

[0051] Step 102, when a stack start instruction is received and the current hydrogen fuel cell stack meets the start condition determined based on the start priority, start the current hydrogen fuel cell stack.

[0052] Among them, the starting conditions include: there is no starting failure in the current hydrogen fuel cell stack, the required power generation power of the current hydrogen fuel cell stack is greater than the first preset threshold, the remaining power of the vehicle's power battery is greater than the second preset threshold, the remaining power is less than the third preset threshold, and the remaining hydrogen amount of the current hydrogen fuel cell stack is greater than the fourth preset threshold.

[0053] Specifically, if the current hydrogen stack meets all the items in the start-up conditions, it will be started. If any one or more items are not met, the next hydrogen stack will be directly determined. The hydrogen stack will not be started during this driving, and the relevant information of the hydrogen stack that failed to start will be sent to the VCU.

[0054] Specifically, determine whether the required power generation power of the current hydrogen fuel cell stack is greater than the first preset threshold, whether the remaining power is greater than the second preset threshold, whether the remaining power is less than the third preset threshold, and whether the remaining hydrogen is greater than the fourth preset threshold. If all of them are true, start the current hydrogen fuel cell stack.

[0055] Among them, the first preset threshold is the minimum power generation corresponding to the current hydrogen stack.

[0056] In order to prevent frequent switching of judgment results under boundary conditions, the present application adopts a hysteresis judgment control strategy and solves the problem by setting a hysteresis offset.

[0057] Among them, different thresholds correspond to different hysteresis offsets, which are pre-calibrated. For example, the first preset threshold corresponds to the first hysteresis offset, the second preset threshold corresponds to the second hysteresis offset, the third preset threshold corresponds to the third hysteresis offset, and the fourth preset threshold corresponds to the fourth hysteresis offset.

[0058] The requirement that the remaining power is less than a third preset threshold value (the value is calibrated in advance) is to prevent the problem of overcharging the power battery when the hydrogen stack is started when the remaining power of the power battery is too high.

[0059] The reason why the remaining amount of hydrogen is greater than a fourth preset threshold value (the value is calibrated in advance) is to prevent the problem of startup failure due to insufficient hydrogen.

[0060] Among them, the required power generation power is obtained through the fault system. The fault system will evaluate each hydrogen stack to obtain the required power generation power of each hydrogen stack. The FCU can obtain the required starting power of each hydrogen stack through the fault system.

[0061] Step 103, during the startup of the current hydrogen fuel cell stack, determine that the net power generated by the current hydrogen fuel cell stack is greater than a preset startup threshold within a preset duration, and if the startup conditions are still met during the startup process, start the next hydrogen fuel cell stack until all hydrogen fuel cell stacks are started.

[0062] Specifically, the vehicle controller (VCU) identifies the vehicle's required power based on the driver's brake pedal, accelerator pedal, cruise and intelligent driving signals, distributes power to the power battery and hydrogen stack, and sends start-stop instructions and starting power requests to the hydrogen fuel cell controller (FCU). The FCU starts the hydrogen stack and generates electricity based on the instructions sent by the VCU.

[0063] Specifically, during the startup of the current hydrogen stack, if the value is not continuously greater than the preset startup threshold within the preset duration, it is determined that the startup of the current hydrogen stack has failed, and the startup operation of the next hydrogen stack is performed. The startup operation of the next hydrogen stack includes: judging whether the next mild hydrogen stack meets the startup conditions, and if it is determined that the next hydrogen stack meets the startup conditions, starting the next hydrogen stack and executing step 103.

[0064] For details, please refer to Figure 2 , the power-on time is taken as the coordinate origin, and the stack is started after receiving the start-up command. As the execution of the start-up process requires more and more power generation, it needs to be greater than the preset start-up threshold within the preset duration (T1). The time from the start-up to meeting all conditions and starting the next hydrogen stack is T2. Figure 2 After reaching the target power, it becomes flat.

[0065] Specifically, during the current hydrogen stack startup process, if the net power generation is not continuously greater than the preset startup threshold within the preset duration, the hydrogen stack can be restarted. If the net power generation is continuously greater than the preset startup threshold for the preset number of times, it is determined that the current hydrogen stack startup has failed.

[0066] Specifically, during the current hydrogen stack startup process, if the startup conditions are not met, it is determined that the current hydrogen stack startup has failed.

[0067] In addition, for the hydrogen stack that failed to start, the hydrogen stack will not be started during this driving, and relevant information of the hydrogen stack that failed to start will be sent to the VCU.

[0068] It should also be noted that if the current hydrogen stack is started successfully, starting the next hydrogen stack does not mean that the current hydrogen stack remains unchanged. When determining the next hydrogen stack and the startup process, the current hydrogen stack will continue to start until the target power is reached.

[0069] The startup control method of the hydrogen fuel cell stack provided in the embodiment of the present application determines the startup priority of each hydrogen fuel cell stack corresponding to the current time each time the vehicle is powered on, so as to start the hydrogen fuel cell stack based on the startup priority; when the stack startup instruction is received and the current hydrogen fuel cell stack determined based on the startup priority meets the startup conditions, the current hydrogen fuel cell stack is started; during the startup process of the current hydrogen fuel cell stack, if it is determined that the net power generated by the current hydrogen fuel cell stack is greater than a preset startup threshold within a preset duration, and the startup conditions are still met during the startup process, the next hydrogen fuel cell stack is started until all hydrogen fuel cell stacks are started. The present application further performs pre-startup judgment and startup process judgment on each hydrogen fuel cell stack in turn based on the startup priority to ensure that the hydrogen fuel cell can be started safely and successfully, solving a series of problems in the prior art such as startup failure, false alarm of low voltage fault and system voltage shock when multiple hydrogen stacks are started at the same time, and achieving the purpose of successfully starting multiple hydrogen stacks while reducing the impact on the vehicle system.

[0070] In a specific embodiment, the specific implementation of determining the startup priority of each hydrogen fuel cell stack corresponding to the vehicle includes:

[0071] Determine whether the current vehicle power-on is the first power-on; if it is determined that the current vehicle power-on is the first power-on, obtain a preset initial startup priority, and determine the initial startup priority as the startup priority; if it is determined that the current vehicle power-on is not the first power-on, obtain the total operating and power generation time of each hydrogen fuel cell stack; determine the startup priority based on the total operating and power generation time.

[0072] Among them, the total operating power generation time is inversely proportional to the startup priority.

[0073] In a specific embodiment, the specific implementation of determining the startup priority based on the total duration of power generation includes:

[0074] Determine whether there is an identical duration in the total running and power generation duration corresponding to the current vehicle power-on; when it is determined that there is no identical duration in the current vehicle power-on, determine the priority of each hydrogen fuel cell stack in turn according to the total running and power generation duration to obtain the startup priority; when it is determined that there is an identical duration in the current vehicle power-on, obtain the previous startup priority corresponding to the previous vehicle power-on; determine the candidate priority of each hydrogen fuel cell stack in turn according to the total running and power generation duration; for hydrogen fuel cell stacks with the same duration, adjust the candidate priority based on the previous startup priority to obtain the startup priority.

[0075] Among them, for a hydrogen fuel cell stack of the same duration, the previous startup priority is consistent with the current startup priority.

[0076] Specifically, an initial startup priority is set for the hydrogen stack. Each hydrogen stack corresponding to the vehicle is numbered, for example, from 1 to N, where N is the number of hydrogen stacks. The startup priority is set according to the number of the hydrogen stack, for example, the larger the number, the lower the corresponding startup priority.

[0077] In the initial state, that is, when the hydrogen stack is powered on for the first time, the startup priority of hydrogen stack numbered 1 is 1, the startup priority of hydrogen stack numbered 2 is 2, ..., and the startup priority of hydrogen stack numbered N is N. After receiving the stack startup instruction, the startup priority of 1 is started first, followed by the startup priority of 2, and then the startup priority of 3, until all hydrogen stacks are started.

[0078] In addition, the timing is started each time each hydrogen stack is started, and its running power generation time is recorded. If it is the first start, the timing can be started from zero; if it is not the first start, it is necessary to start the timing based on the running power generation time (total running power generation time) obtained by the cumulative timing of the last start, and obtain the running power generation time obtained by the cumulative timing of this start.

[0079] Specifically, as the running power generation time of the hydrogen stack increases, the performance of the hydrogen stack will gradually decline. Therefore, in order to balance the performance of the hydrogen fuel cell, it is necessary to balance the running power generation time of the hydrogen stack, that is, the longer the total running power generation time, the lower the startup priority.

[0080] In the case of the same total operating power generation time, referring to the previous startup priority, the hydrogen stack with a higher startup priority in the previous startup will also have a higher priority when the current startup priority is confirmed.

[0081] The present application determines the startup priority by the operating power generation time of the hydrogen stack, thereby ensuring that the performance of each hydrogen stack is relatively consistent and providing stable energy for the vehicle system.

[0082] In a specific embodiment, when the vehicle is powered on, after determining the startup priority of each hydrogen fuel cell stack corresponding to the vehicle, the vehicle's total vehicle power requirement is obtained; based on the minimum power generation power of each hydrogen fuel cell stack and the vehicle's total vehicle power requirement, the number of hydrogen fuel cell stacks to be started is determined; and finally, the startup of this number of hydrogen fuel cell stacks is completed.

[0083] Specifically, the quotient obtained by dividing the vehicle required power and the minimum power generation is used as the number of hydrogen fuel cell stacks to be started. If the quotient is a decimal, it is rounded up to obtain the final result.

[0084] In a specific embodiment, when it is determined that the vehicle is powered on, after determining the start priority of each hydrogen fuel cell stack corresponding to the vehicle, a threshold determination parameter is obtained; when it is determined that the threshold determination parameter meets the first determination condition, or when it is determined that the threshold determination parameter meets the second determination condition, the second preset threshold is the preset start threshold corresponding to the current hydrogen fuel cell stack, wherein the preset start threshold is pre-calibrated; when it is determined that the threshold determination parameter does not meet the first determination condition and does not meet the second determination condition, based on the difference between the preset vehicle demand power and the first maximum discharge power and the change rate of the required total power generation and the correspondence between the second preset threshold and the preset start threshold, the final second preset threshold and the final preset start threshold are determined.

[0085] Among them, the first determination condition includes: the difference between the vehicle demand power and the first maximum discharge power is less than or equal to the second maximum discharge power; the second determination condition includes: the change rate of the required total power generation is less than or equal to the preset change rate.

[0086] Among them, the total power generation required is equal to the sum of the power generation required for each item.

[0087] Among them, the threshold determination parameters include: the vehicle's required power, the first maximum discharge power of the power battery, the required power generation power corresponding to each hydrogen fuel cell stack, and the second maximum discharge power corresponding to the hydrogen fuel cell stack.

[0088] In a specific embodiment, the greater the difference between the vehicle's required power and the first maximum discharge power and the rate of change of the required total power generation, the greater the second preset threshold and the smaller the preset start threshold.

[0089] Specifically, starting the hydrogen stack based on the starting priority can reduce the remaining power of the power battery at startup, prevent startup failure, and reduce the impact on the vehicle system at startup. However, compared with the simultaneous startup of the hydrogen stack, the FCU startup speed will be slowed down, and it may not be able to respond to the power demand of the vehicle in time. To address this problem, the present application determines the corresponding second preset threshold and preset startup threshold based on the threshold determination parameter to solve it.

[0090] Specifically, when the power demanded by the whole vehicle is small, that is, the difference between the power demanded by the whole vehicle and the first maximum discharge power is less than or equal to the second maximum discharge power, or when the FCU demand is slow, that is, the rate of change of the required total power generation is less than or equal to the preset rate of change, the second preset threshold is the preset start threshold corresponding to the current hydrogen fuel cell stack, and the preset start threshold is pre-calibrated, and the calibrated value is the start value corresponding to the vehicle when it starts normally.

[0091] Specifically, when the normal demand power is large, that is, the difference between the vehicle demand power and the first maximum discharge power is greater than the second maximum discharge power, and when the FCU demand is urgent, that is, the change rate of the required total power generation is greater than the preset change rate, the second preset threshold and the preset start threshold corresponding to the difference between the vehicle demand power and the first maximum discharge power and the required total power generation are obtained according to the corresponding relationship.

[0092] Specifically, the greater the difference between the vehicle's required power and the first maximum discharge power and the change rate of the required total power generation, the greater the second preset threshold and the smaller the preset start threshold. The specific data is pre-calibrated based on the performance of the power battery and the performance of the hydrogen stack.

[0093] Specifically, the larger the second preset threshold, the greater the electric energy that can be provided for starting the hydrogen stack, which can meet the start-up of multiple hydrogen stacks; the smaller the preset start-up threshold, the shorter the hydrogen stack start-up interval, and the faster the start-up and response speed of the hydrogen stack. The problem of slow FCU start-up speed and inability to respond to the power demand of the entire vehicle in time can be solved by adjusting the second preset threshold and the preset start-up threshold.

[0094] In a specific embodiment, the specific implementation of determining the startup priority of each hydrogen fuel cell stack corresponding to the vehicle includes:

[0095] Determine whether the current vehicle power-on is the first power-on; if it is determined that the current vehicle power-on is the first power-on, obtain a preset initial startup priority, and determine the initial startup priority as the startup priority; if it is determined that the current vehicle power-on is not the first power-on, obtain the previous startup priority corresponding to the last vehicle power-on, the last hydrogen fuel cell stack that ran for power generation, and the last power generation time of each hydrogen fuel cell stack that ran for power generation; adjust the previous startup priority based on the size of the last power generation time to obtain the startup priority.

[0096] Specifically, the present application determines the current startup priority by the previous startup priority and the previous power generation duration.

[0097] The present application determines the startup priority each time, and starts the hydrogen stacks in sequence according to the startup priority, so as to achieve the purpose of successfully starting multiple hydrogen stacks while reducing the impact on the vehicle system.

[0098] The present application also provides a startup control device for a hydrogen fuel cell stack. The specific implementation of the device can refer to the description of the startup control method for a hydrogen fuel cell stack, and the repeated parts will not be repeated. Figure 3 As shown, the device comprises:

[0099] The determination module 301 is used to determine the start-up priority of each hydrogen fuel cell stack corresponding to the vehicle when it is determined that the vehicle is powered on, wherein the start-up priority is obtained based on the operating power generation time of each hydrogen fuel cell stack.

[0100] The first start-up module 302 is used to start the current hydrogen fuel cell stack when a stack start-up instruction is received and the current hydrogen fuel cell stack determined based on the start-up priority meets the start-up conditions, wherein the start-up conditions include: there is no start-up failure in the current hydrogen fuel cell stack, the required power generation power of the current hydrogen fuel cell stack is greater than a first preset threshold, the remaining power of the vehicle's power battery is greater than a second preset threshold, the remaining power is less than a third preset threshold, and the remaining hydrogen amount of the current hydrogen fuel cell stack is greater than a fourth preset threshold.

[0101] The second starting module 303 is used to determine during the startup of the current hydrogen fuel cell stack that the net power generated by the current hydrogen fuel cell stack is greater than a preset startup threshold within a preset duration, and if the startup conditions are still met during the startup process, start the next hydrogen fuel cell stack until all hydrogen fuel cell stacks are started.

[0102] In a specific embodiment, the determination module 301 is used to determine whether the current vehicle power-on is the first power-on; when it is determined that the current vehicle power-on is the first power-on, obtain a preset initial startup priority, and determine the initial startup priority as the startup priority; when it is determined that the current vehicle power-on is not the first power-on, obtain the total operating and power generation time of each hydrogen fuel cell stack; determine the startup priority based on the total operating and power generation time, wherein the total operating and power generation time is inversely proportional to the startup priority.

[0103] In a specific embodiment, the determination module 301 is used to determine whether there is an identical duration in the total running and power generation duration corresponding to the current vehicle power-on; when it is determined that there is no identical duration in the current vehicle power-on, the priority of each hydrogen fuel cell stack is determined in turn according to the total running and power generation duration to obtain the startup priority; when it is determined that there is an identical duration in the current vehicle power-on, the previous startup priority corresponding to the previous vehicle power-on is obtained; the candidate priority of each hydrogen fuel cell stack is determined in turn according to the total running and power generation duration; for hydrogen fuel cell stacks of the same duration, the candidate priority is adjusted based on the previous startup priority to obtain the startup priority; wherein, for hydrogen fuel cell stacks of the same duration, the level of the previous startup priority is consistent with the level of the current startup priority.

[0104] In a specific embodiment, the determination module 301 is also used to obtain the vehicle's required power; based on the minimum power generation power of each hydrogen fuel cell stack and the vehicle's required power, the number of hydrogen fuel cell stacks to be started is determined; the second starting module 303 is used to complete the startup of a number of hydrogen fuel cell stacks.

[0105] In a specific embodiment, the determination module 301 is also used to obtain threshold determination parameters, wherein the threshold determination parameters include: the vehicle's whole vehicle demand power, the first maximum discharge power of the power battery, the demand power generation corresponding to each hydrogen fuel cell stack, and the second maximum discharge power corresponding to the hydrogen fuel cell stack; when the threshold determination parameter is determined to meet the first determination condition, or when the threshold determination parameter is determined to meet the second determination condition, the second preset threshold is the preset start threshold corresponding to the current hydrogen fuel cell stack; wherein the preset start threshold is pre-calibrated; wherein the first determination condition includes: the difference between the whole vehicle demand power and the first maximum discharge power is less than or equal to the second maximum discharge power; the second determination condition includes: the change rate of the total power generation required is less than or equal to the preset change rate; wherein the total power generation required is equal to the sum of the power generation required; when the threshold determination parameter is determined not to meet the first determination condition and does not meet the second determination condition, the final second preset threshold and the final preset start threshold are determined based on the difference between the preset whole vehicle demand power and the first maximum discharge power and the change rate of the total power generation required and the corresponding relationship between the second preset threshold and the preset start threshold.

[0106] In a specific embodiment, the greater the difference between the vehicle's required power and the first maximum discharge power and the rate of change of the required total power generation, the greater the second preset threshold and the smaller the preset start threshold.

[0107] In a specific embodiment, the determination module 301 is used to determine whether the current vehicle power-on is the first power-on; when it is determined that the current vehicle power-on is the first power-on, obtain a preset initial startup priority, and determine the initial startup priority as the startup priority; when it is determined that the current vehicle power-on is not the first power-on, obtain the previous startup priority corresponding to the last vehicle power-on, the last hydrogen fuel cell stack that ran for power generation, and the last power generation time of each hydrogen fuel cell stack that ran for power generation; adjust the previous startup priority based on the size of the last power generation time to obtain the startup priority.

[0108] Figure 4 An example of a physical structure diagram of an electronic device is shown in FIG. Figure 4 As shown, the electronic device may include: a processor (processor) 401, a communication interface (Communications Interface) 402, a memory (memory) 403 and a communication bus 404, wherein the processor 401, the communication interface 402, and the memory 403 communicate with each other through the communication bus 404. The processor 401 may call the logic instructions in the memory 403 to execute the startup control method of the hydrogen fuel cell stack.

[0109] In addition, the logic instructions in the above-mentioned memory 403 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on such an understanding, the technical solution of the present invention can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0110] On the other hand, the present invention also provides a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium, and the computer program includes program instructions. When the program instructions are executed by a computer, the computer can execute the startup control method of the hydrogen fuel cell stack provided by the above-mentioned methods.

[0111] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which is implemented when the computer program is executed by a processor to execute the startup control method of the hydrogen fuel cell stack provided in the above-mentioned embodiments.

[0112] The device embodiments described above are schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0113] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0114] Finally, it should be noted that the above is only the preferred implementation of the present application, and the present application is not limited to the above embodiments. Other improvements and changes directly derived or associated by those skilled in the art without departing from the spirit and concept of the present application should be considered to be included in the scope of protection of the present application.

Claims

1. A startup control method for a hydrogen fuel cell stack, characterized in that: The method comprises: When it is determined that the vehicle is powered on, determining the startup priority of each hydrogen fuel cell stack corresponding to the vehicle, wherein the startup priority is obtained based on the operation and power generation time of each hydrogen fuel cell stack; Upon receiving a stack start instruction and in the case that the current hydrogen fuel cell stack determined based on the start priority meets the start condition, start the current hydrogen fuel cell stack, wherein the start condition includes: there is no start failure in the current hydrogen fuel cell stack, the required power generation power of the current hydrogen fuel cell stack is greater than a first preset threshold, the remaining power of the vehicle's power battery is greater than a second preset threshold, the remaining power is less than a third preset threshold, and the remaining amount of hydrogen in the current hydrogen fuel cell stack is greater than a fourth preset threshold; During the startup of the current hydrogen fuel cell stack, if it is determined that the net power generated by the current hydrogen fuel cell stack is greater than a preset startup threshold within a preset duration, and if the startup conditions are still met during the startup process, the next hydrogen fuel cell stack is started until all hydrogen fuel cell stacks are started.

2. The startup control method of a hydrogen fuel cell stack according to claim 1, characterized in that: Determine the startup priority of each hydrogen fuel cell stack corresponding to the vehicle, including: Determine whether the current vehicle power-on is the first power-on; In the case where it is determined that the current vehicle power-on is the first power-on, obtaining a preset initial startup priority, and determining the initial startup priority as the startup priority; When it is determined that the current vehicle power-on is not the first power-on, the total operating and power generation time of each hydrogen fuel cell stack is obtained; the startup priority is determined based on the total operating and power generation time, wherein the total operating and power generation time is inversely proportional to the startup priority.

3. The startup control method of a hydrogen fuel cell stack according to claim 2, characterized in that: The startup priority is determined based on the total duration of power generation operation, including: Determine whether there is a same duration in the total running and power generation duration corresponding to the current vehicle power-on; In the case where it is determined that there is no same duration for the current vehicle power-on, the priority of each hydrogen fuel cell stack is determined in sequence according to the total power generation time, to obtain the startup priority; When it is determined that the current vehicle is powered on for the same duration, the previous startup priority corresponding to the last vehicle power-on is obtained; the candidate priority of each hydrogen fuel cell stack is determined in turn according to the total power generation duration; for hydrogen fuel cell stacks with the same duration, the candidate priority is adjusted based on the previous startup priority to obtain the startup priority; Among them, for a hydrogen fuel cell stack of the same duration, the previous startup priority is consistent with the current startup priority.

4. The startup control method of a hydrogen fuel cell stack according to any one of claims 1 to 3, characterized in that: When the vehicle is powered on, after determining the start priority of each hydrogen fuel cell stack corresponding to the vehicle, the method further includes: Obtain the vehicle's required power; Determining the number of hydrogen fuel cell stacks to be started based on the minimum power generation of each hydrogen fuel cell stack and the required power of the entire vehicle; Until all hydrogen fuel cell stacks are started, including: Until the startup of the said number of hydrogen fuel cell stacks is completed.

5. The startup control method of a hydrogen fuel cell stack according to any one of claims 1 to 3, characterized in that: When the vehicle is powered on, after determining the start priority of each hydrogen fuel cell stack corresponding to the vehicle, the method further includes: Obtaining threshold determination parameters, wherein the threshold determination parameters include: the vehicle's required power, the first maximum discharge power of the power battery, the required power generation power corresponding to each hydrogen fuel cell stack, and the second maximum discharge power corresponding to the hydrogen fuel cell stack; In the case where it is determined that the threshold determination parameter meets the first determination condition, or in the case where it is determined that the threshold determination parameter meets the second determination condition, the second preset threshold is the preset start threshold corresponding to the current hydrogen fuel cell stack; Wherein, the preset start threshold is pre-calibrated; Wherein, the first determination condition includes: the difference between the vehicle required power and the first maximum discharge power is less than or equal to the second maximum discharge power; the second determination condition includes: the change rate of the required total power generation is less than or equal to the preset change rate; Wherein, the total power generation required is equal to the sum of the power generation required; When it is determined that the threshold determination parameters do not meet the first determination condition and do not meet the second determination condition, the final second preset threshold and the final preset start threshold are determined based on the difference between the preset vehicle demand power and the first maximum discharge power and the change rate of the required total power generation and the correspondence between the second preset threshold and the preset start threshold.

6. The startup control method of a hydrogen fuel cell stack according to claim 5, characterized in that: The greater the difference between the vehicle's required power and the first maximum discharge power and the rate of change of the required total power generation, the greater the second preset threshold and the smaller the preset start threshold.

7. The startup control method of a hydrogen fuel cell stack according to claim 1, characterized in that: Determine the startup priority of each hydrogen fuel cell stack corresponding to the vehicle, including: Determine whether the current vehicle power-on is the first power-on; In the case where it is determined that the current vehicle power-on is the first power-on, obtaining a preset initial startup priority, and determining the initial startup priority as the startup priority; When it is determined that the current vehicle power-on is not the first time, obtain the previous startup priority corresponding to the last time the vehicle was powered on, the hydrogen fuel cell stack that last generated electricity, and the last power generation time of each hydrogen fuel cell stack that last generated electricity; adjust the previous startup priority based on the size of the last power generation time to obtain the startup priority.

8. A startup control device for a hydrogen fuel cell stack, characterized in that: The device comprises: A determination module, for determining the startup priority of each hydrogen fuel cell stack corresponding to the vehicle when it is determined that the vehicle is powered on, wherein the startup priority is obtained based on the operation and power generation time of each hydrogen fuel cell stack; a first starting module, configured to start the current hydrogen fuel cell stack upon receiving a stack starting instruction and the current hydrogen fuel cell stack determined based on the starting priority meets the starting conditions, wherein the starting conditions include: the current hydrogen fuel cell stack does not have a starting fault, the required power generation power of the current hydrogen fuel cell stack is greater than a first preset threshold, the remaining power of the vehicle's power battery is greater than a second preset threshold, the remaining power is less than a third preset threshold, and the remaining amount of hydrogen in the current hydrogen fuel cell stack is greater than a fourth preset threshold; The second starting module is used to determine during the startup of the current hydrogen fuel cell stack that the net power generated by the current hydrogen fuel cell stack is greater than a preset starting threshold within a preset duration, and if the starting conditions are still met during the startup process, start the next hydrogen fuel cell stack until all hydrogen fuel cell stacks are started.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the steps of the startup control method of the hydrogen fuel cell stack as described in any one of claims 1 to 7 are implemented.

10. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the startup control method of the hydrogen fuel cell stack as described in any one of claims 1 to 7 are implemented.

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