Fuel cell control method and device, electronic equipment and vehicle

Abstract

The invention relates to a control method and device of a fuel cell, electronic equipment and a vehicle. The method comprises the following steps: acquiring a stack-out temperature of the fuel cell of the vehicle; when the out-of-stack temperature is smaller than a preset starting temperature threshold value, the single cell voltage of the fuel cell is determined based on the out-of-stack temperature, so that the fuel cell is controlled to enter a reduction state through the single cell voltage, and reversible attenuation of the fuel cell is recovered; when the out-of-stack temperature is larger than or equal to a preset starting temperature threshold value, the power battery SOC of the vehicle is obtained, and when the power battery SOC is larger than a preset SOC threshold value, the single battery voltage of the fuel battery is determined, so that the fuel battery is controlled to enter a reduction state through the single battery voltage, and reversible attenuation of the fuel battery is recovered. The fuel cell attenuation rate can be reduced, the service life of the fuel cell is prolonged, the power generation efficiency of the fuel cell is improved, vehicle hydrogen consumption is reduced, and economical efficiency and vehicle safety are improved.

Description

Technical Field

[0001] The present disclosure relates to the field of fuel cell vehicle control technology, and in particular, to a fuel cell control method, device, electronic equipment and vehicle. Background Art

[0002] At present, hydrogen fuel cell vehicles are in a stage of rapid development, and the reversible attenuation of the fuel cell system in hydrogen fuel cell vehicles is a common phenomenon in the operation of fuel cells. This temporary decline in performance can be restored under appropriate conditions. The generation of reversible attenuation involves a variety of complex factors, which can affect the performance of fuel cells simultaneously or individually. When the reversible attenuation of the fuel cell system is not restored for a long time, it may evolve into irreversible attenuation and accelerate the attenuation rate. How to achieve the partial reversible attenuation of the fuel cell can be restored is a technical problem that needs to be solved urgently. Summary of the invention

[0003] In order to overcome the problems existing in the related art, the present disclosure provides a fuel cell control method, device, electronic equipment and vehicle.

[0004] According to a first aspect of an embodiment of the present disclosure, there is provided a method for controlling a fuel cell, comprising: Obtaining the outlet temperature of the vehicle fuel cell; When the stack exit temperature is less than a preset start-up temperature threshold, determining a single cell voltage of the fuel cell based on the stack exit temperature, so as to control the fuel cell to enter a reduction state through the single cell voltage, and restore the reversible attenuation of the fuel cell; When the stack temperature is greater than or equal to a preset starting temperature threshold, the power battery SOC of the vehicle is obtained, and when the power battery SOC is greater than a preset SOC threshold, the single-cell voltage of the fuel cell is determined, so as to control the fuel cell to enter a reduction state through the single-cell voltage to restore the reversible attenuation of the fuel cell.

[0005] Optionally, when the stack exit temperature is less than a preset start-up temperature threshold, determining a single cell voltage of the fuel cell based on the stack exit temperature, so as to control the fuel cell to enter a reduction state through the single cell voltage, and recover the reversible attenuation of the fuel cell, comprises: When the stack exit temperature is less than a preset start temperature threshold, comparing the stack exit temperature with a first preset temperature threshold; When the stack temperature is greater than or equal to a first preset temperature threshold, the DC controller is controlled not to load current, and the fuel cell is controlled to enter a reduction state according to the single-chip battery voltage to restore the reversible attenuation of the fuel cell, or the fuel cell is controlled to shut down due to a fault; When the stack temperature is lower than the first preset temperature threshold, the fuel cell stack is heated by the vehicle's PTC heater, and after the stack is heated, the DC controller is controlled not to draw current, and the fuel cell is controlled to enter a reduction state according to the single-chip cell voltage to restore the reversible attenuation of the fuel cell, or the fuel cell is controlled to shut down due to a fault.

[0006] Optionally, the controlling the DC controller not to pull current, and controlling the fuel cell to enter a reduction state to restore the reversible attenuation of the fuel cell according to the voltage of the single-chip battery, or controlling the fuel cell to shut down due to a fault, includes: After controlling the DC controller not to draw current, comparing the single-chip battery voltage with a first preset voltage threshold; When the single cell voltage is greater than or equal to the first preset voltage threshold, the DC controller is used to control the single cell voltage to decrease to a second preset voltage threshold, so that the fuel cell enters a reduction state, until the stack temperature and / or the reduction state meets a first set condition, the DC controller is used to reduce the current to adjust the single cell voltage, so that the fuel cell responds to the target power of the entire vehicle; When the single cell voltage is less than the first preset voltage threshold and the single cell voltage meets a second set condition, the fuel cell is controlled to fail and shut down.

[0007] Optionally, when the stack temperature is greater than or equal to a preset start-up temperature threshold, the SOC of the power battery of the vehicle is obtained, and when the SOC of the power battery of the vehicle is greater than a preset SOC threshold, the single-chip cell voltage of the fuel cell is determined, so as to control the fuel cell to enter a reduction state through the single-chip cell voltage, and restore the reversible attenuation of the fuel cell, including: When the stack temperature is greater than or equal to a preset start-up temperature threshold, obtaining the power battery SOC of the vehicle and the first start-up number of the vehicle; When the SOC of the power battery is less than or equal to the preset SOC threshold, adding one to the first startup number to obtain an updated first startup number of the fuel cell; When the power battery SOC is greater than the preset SOC threshold and the first startup number is zero, the single cell voltage of the fuel cell is determined to control the fuel cell to enter a reduction state through the single cell voltage to restore the reversible attenuation of the fuel cell.

[0008] Optionally, when the power battery SOC is greater than the preset SOC threshold and the first startup number is zero, determining the single cell voltage of the fuel cell, so as to control the fuel cell to enter a reduction state through the single cell voltage, and restore the reversible attenuation of the fuel cell, comprises: When the SOC of the power battery of the vehicle is greater than a preset SOC threshold and the first startup number is zero, the DC controller is controlled not to load current, and then the single-chip battery voltage is compared with a first preset voltage threshold; When the single cell voltage is greater than or equal to the first preset voltage threshold, the DC controller is used to control the single cell voltage to decrease to a second preset voltage threshold, so that the fuel cell enters a reduction state, until the stack temperature and / or the reduction state meets a first set condition, the DC controller is used to reduce the current to adjust the single cell voltage, so that the fuel cell responds to the target power of the entire vehicle; When the single cell voltage is less than the first preset voltage threshold and the single cell voltage meets a second set condition, the fuel cell is controlled to fail and shut down.

[0009] Optionally, obtaining a first startup number of the fuel cell of the vehicle includes: When the vehicle is in a startup state, determining a first startup number of the fuel cell based on a preset cycle and whether the fuel cell of the vehicle has entered a reduction state in a current cycle; When the fuel cell has not entered the reduction state, setting the first startup number of the fuel cell to zero; When the fuel cell enters a reduction state, determining whether a current cycle of the vehicle is the same as a cycle of a previous start-up state of the vehicle; When the current cycle of the vehicle is different from the cycle of the vehicle in the previous startup state, setting the first startup number of the fuel cell to zero; When the current cycle of the vehicle is the same as the cycle of the vehicle in the previous startup state, the first startup number is increased by one to obtain an updated first startup number of the fuel cell.

[0010] Optionally, the method further comprises: When the rocker switch of the fuel cell is in the off state, a shutdown instruction is generated by the vehicle controller of the vehicle, and the shutdown instruction is used to instruct the fuel cell controller to control the engine of the fuel cell to shut down.

[0011] According to a second aspect of an embodiment of the present disclosure, there is provided a control device for a fuel cell, comprising: An acquisition module, used to obtain the out-of-stack temperature of a vehicle fuel cell; A first control module, configured to determine a single cell voltage of the fuel cell based on the stack outlet temperature when the stack outlet temperature is less than a preset start-up temperature threshold, so as to control the fuel cell to enter a reduction state through the single cell voltage to restore the reversible attenuation of the fuel cell; The second control module obtains the SOC of the power battery of the vehicle when the stack temperature is greater than or equal to a preset starting temperature threshold, and determines the single-cell voltage of the fuel cell when the power battery SOC is greater than a preset SOC threshold, so as to control the fuel cell to enter a reduction state through the single-cell voltage to restore the reversible attenuation of the fuel cell.

[0012] According to a third aspect of an embodiment of the present disclosure, there is provided an electronic device, including: a memory having a computer program stored thereon; A processor, configured to execute the computer program in the memory to implement the steps of the fuel cell control method according to the first aspect of the embodiment of the present disclosure. According to a fourth aspect of an embodiment of the present disclosure, a vehicle is provided, comprising: the electronic device described in the third aspect of an embodiment of the present disclosure.

[0013] In the above technical solution, the out-of-stack temperature of the vehicle fuel cell is obtained; when the out-of-stack temperature is less than the preset start-up temperature threshold, the single-cell voltage of the fuel cell is determined based on the out-of-stack temperature, so as to control the fuel cell to enter a reduction state through the single-cell voltage and restore the reversible decay of the fuel cell; when the out-of-stack temperature is greater than or equal to the preset start-up temperature threshold, the power battery SOC of the vehicle is obtained, and when the power battery SOC is greater than the preset SOC threshold, the single-cell voltage of the fuel cell is determined, so as to control the fuel cell to enter a reduction state through the single-cell voltage and restore the reversible decay of the fuel cell. Through the above technical solution, the fuel cell can be controlled to enter a reduction state to restore the reversible decay of the fuel cell, thereby reducing the decay rate of the fuel cell and increasing the service life of the fuel cell. At the same time, the power generation efficiency of the fuel cell can be improved, the hydrogen consumption of the vehicle can be reduced, the economy and competitive advantage can be improved, and the safety of the whole vehicle can be improved.

[0014] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings: Figure 1 is a flow chart of a method for controlling a fuel cell according to an exemplary embodiment.

[0016] Figure 2 is a flow chart showing another method for controlling a fuel cell according to an exemplary embodiment.

[0017] Figure 3 is a flow chart showing another method for controlling a fuel cell according to an exemplary embodiment.

[0018] Figure 4 is a flow chart showing another method for controlling a fuel cell according to an exemplary embodiment.

[0019] Figure 5 is a flow chart of yet another method for controlling a fuel cell according to an exemplary embodiment.

[0020] Figure 6 is a flow chart of yet another method for controlling a fuel cell according to an exemplary embodiment.

[0021] Figure 7 is a block diagram of a control device for a fuel cell according to an exemplary embodiment.

[0022] Figure 8 is a block diagram of an electronic device 800 according to an exemplary embodiment.

[0023] Fig. 9 is a block diagram of an electronic device 900 according to an exemplary embodiment. DETAILED DESCRIPTION

[0024] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0025] It is understood that the terms "first", "second", etc. in the present disclosure are used to describe various information, but these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other, and do not indicate a specific order or importance.

[0026] It is further understood that, although the operations are described in a specific order in the drawings in the embodiments of the present disclosure, it should not be understood as requiring the operations to be performed in the specific order shown or in a serial order, or requiring the execution of all the operations shown to obtain the desired results. In certain environments, multitasking and parallel processing may be advantageous.

[0027] It should be noted that all actions of acquiring signals, information or data in the present disclosure are carried out in compliance with the relevant data protection laws and policies of the country where the device is located and with the authorization given by the owner of the corresponding device.

[0028] The applicant has found that in the prior art, during the operation of the fuel cell, the reversible attenuation of the fuel cell system is a common phenomenon. The primary influencing factor is the change in the state of the platinum catalyst. The platinum catalyst may be reduced to platinum oxide at a high potential. This change may temporarily affect the activity of the catalyst, thereby affecting the performance of the fuel cell; when the potential is further increased, the platinum may also be oxidized into platinum ions, which may lead to the loss of platinum, thereby exacerbating the decline in the performance of the fuel cell, thereby directly affecting the overall performance of the fuel cell. Secondly, when the fuel cell is started, the membrane will dry out during the loading process due to the lack of gas in the local monolithic cell, and the membrane dryness phenomenon may also cause the reverse polarity phenomenon. Reverse polarity refers to the fact that during the operation of the fuel cell, due to the abnormal internal potential of some monolithic cells, the positive and negative electrodes are reversed. This phenomenon not only causes a sharp decline in the performance of the monolithic cell, but also may cause irreversible damage to the entire fuel cell system. The reverse polarity phenomenon will aggravate the degradation of the electrolyte membrane and the deactivation of the catalyst, and further deteriorate the performance of the fuel cell. Therefore, the applicant has proposed a control method for a fuel cell in response to the above problems. The control method of the fuel cell provided by the present disclosure is described below.

[0029] Figure 1 is a flow chart of a method for controlling a fuel cell according to an exemplary embodiment. Figure 1 As shown, the method includes: In step S101 , the out-of-stack temperature of a vehicle fuel cell is obtained.

[0030] In step S102, when the stack temperature is less than a preset start-up temperature threshold, the single cell voltage of the fuel cell is determined based on the stack temperature, so as to control the fuel cell to enter a reduction state through the single cell voltage to restore the reversible attenuation of the fuel cell.

[0031] In step S103, when the stack temperature is greater than or equal to a preset starting temperature threshold, the power battery SOC of the vehicle is obtained, and when the power battery SOC is greater than a preset SOC threshold, the single-chip cell voltage of the fuel cell is determined, so as to control the fuel cell to enter a reduction state through the single-chip cell voltage and restore the reversible attenuation of the fuel cell.

[0032] Exemplarily, when the vehicle is in a starting state, the stack outlet temperature of the fuel cell of the vehicle is obtained, and based on the stack outlet temperature and a preset starting temperature threshold, it is determined whether the fuel cell of the vehicle enters a reduction state; when the stack outlet temperature is less than the preset starting temperature threshold, the vehicle needs to enter a reduction state, and the single-chip cell voltage of the fuel cell is determined based on the stack outlet temperature, and the fuel cell is controlled to enter a reduction state by the single-chip cell voltage to restore the reversible attenuation of the fuel cell; when the stack outlet temperature is greater than or equal to the preset starting temperature threshold, the SOC of the power battery of the vehicle is obtained, and when the power battery SOC is greater than the preset SOC threshold, the single-chip cell voltage of the fuel cell is determined, and the fuel cell is controlled to enter a reduction state by the single-chip cell voltage to restore the reversible attenuation of the fuel cell, wherein, in order to avoid the fuel cell of the vehicle being damaged by frequent reduction state when the power battery SOC satisfies a condition greater than the preset SOC threshold, the reduction state is entered only once when the power battery SOC satisfies a condition greater than the preset SOC threshold within one cycle.

[0033] For example: when the vehicle is in the starting state and the rocker switch of the fuel cell of the vehicle is in the on state, the stack temperature of the fuel cell of the vehicle is obtained, and the vehicle controller of the vehicle compares the stack temperature of the fuel cell of the vehicle with the preset starting temperature threshold. When the preset starting temperature threshold is 0°C, when the stack temperature is less than 0°C, the fuel cell of the vehicle must enter the reduction state, and the single-chip cell voltage of the fuel cell is determined based on the stack temperature. The fuel cell is controlled to enter the reduction state by the single-chip cell voltage to restore the reversible attenuation of the fuel cell; when the stack temperature is greater than or equal to 0°C, the power battery SOC of the vehicle is obtained, and the power battery SOC of the vehicle is compared with the preset SOC threshold. Assuming that the preset SOC threshold is 30%, when the power battery SOC is greater than 30%, it is determined whether the vehicle has entered the reduction state in the current cycle. If the fuel cell of the vehicle has not entered the reduction state in the current cycle, the single-chip cell voltage of the fuel cell is determined, and the fuel cell is controlled to enter the reduction state by the single-chip cell voltage to restore the reversible attenuation of the fuel cell, which can reduce the attenuation rate of the fuel cell and increase the service life of the fuel cell.

[0034] Through the above technical solution, the fuel cell of the vehicle can be controlled to enter a reduction state to restore the reversible attenuation of the fuel cell, thereby reducing the fuel cell attenuation rate and increasing the service life of the fuel cell. At the same time, the fuel cell power generation efficiency can be improved, the vehicle's hydrogen consumption can be reduced, the economy and competitive advantage can be improved, and the safety of the entire vehicle can be improved.

[0035] Figure 2 is a flow chart showing another method for controlling a fuel cell according to an exemplary embodiment. Figure 2 As shown, step S102 includes: In step S1021, when the stack-out temperature is less than the preset start-up temperature threshold, the stack-out temperature is compared with a first preset temperature threshold; In step S1022, when the stack temperature is greater than or equal to a first preset temperature threshold, the DC controller is controlled not to load current, and the fuel cell is controlled to enter a reduction state according to the single cell voltage to restore the reversible attenuation of the fuel cell, or the fuel cell is controlled to shut down due to a fault; In step S1023, when the stack temperature is lower than the first preset temperature threshold, the fuel cell stack is heated by the vehicle's PTC heater, and after the stack is heated, the DC controller is controlled not to draw current, and the fuel cell is controlled to enter a reduction state according to the single-chip cell voltage to restore the reversible attenuation of the fuel cell, or the fuel cell is controlled to shut down due to a fault.

[0036] Exemplarily, when the stack temperature is less than a preset starting temperature threshold, the fuel cell of the vehicle must enter a reduction state, compare the stack temperature with a first preset temperature threshold, and determine the starting mode of the fuel cell based on the comparison result; when the stack temperature is greater than or equal to the first preset temperature threshold, the fuel cell starts normally, controls the DC controller not to load current, and controls the fuel cell to enter a reduction state to restore the reversible attenuation of the fuel cell according to the single-chip battery voltage, or controls the fuel cell to shut down in case of a fault; when the stack temperature is less than the first preset temperature threshold, the fuel cell of the vehicle performs a low-temperature cold start, heats the fuel cell stack through the vehicle's PTC (Positive Temperature Coefficient) heater and water pump, and after heating the stack, controls the DC controller not to load current, and controls the fuel cell to enter a reduction state to restore the reversible attenuation of the fuel cell according to the single-chip battery voltage, or controls the fuel cell to shut down in case of a fault. When the fuel cell of the vehicle performs a low-temperature cold start, when the fuel cell of the vehicle is in a reduction state, the heat energy generated by the fuel cell in the reduction state and the PTC heater of the vehicle are used to heat the fuel cell stack, which can save the power of the vehicle's power battery, shorten the heating time and shorten the start-up time of the fuel cell; in winter when the ambient temperature is low and the temperature difference is large, the benefit of heating through the heat energy generated by the fuel cell in the reduction state is greater than in summer when the temperature difference is small, and the benefit of platinum oxide reduction when the fuel cell is in the reduction state in summer when the temperature difference is small is greater than in winter when the ambient temperature is low and the temperature difference is large.

[0037] The above scheme can determine the starting mode of the fuel cell of the vehicle according to the stack temperature and the first preset threshold value during the operation of the fuel cell, and restore the reversible decay of the fuel cell or control the fuel cell to shut down due to a fault, when the vehicle has not performed the recovery of the reversible decay of the fuel cell in the current cycle, thereby avoiding the platinum catalyst being reduced to platinum oxide at a high potential to affect the activity of the catalyst, thereby affecting the performance of the fuel cell or causing the loss of platinum, and can avoid aggravating the decline in fuel cell performance and affecting the overall performance of the fuel cell.

[0038] Figure 3 is a flow chart showing another method for controlling a fuel cell according to an exemplary embodiment. Figure 3 As shown, the DC controller in steps S1022 and S1023 does not load current, and controls the fuel cell to enter a reduction state to restore the reversible attenuation of the fuel cell according to the voltage of the single-chip battery, or controls the fuel cell to shut down due to a fault, including: In step S10203, after controlling the DC controller not to draw current, the voltage of the single-chip battery is compared with a first preset voltage threshold.

[0039] Exemplarily, after controlling the DC controller not to pull current, a first preset time period is continued to allow the single-chip battery voltage in the fuel cell system to reach a stable state. After the single-chip battery voltage reaches a stable state, the single-chip battery voltage is compared with a first preset voltage threshold.

[0040] In step S10204, when the single-chip battery voltage is greater than or equal to the first preset voltage threshold, the DC controller is used to control the single-chip battery voltage to drop to the second preset voltage threshold so that the fuel cell enters a reduction state, until the stack temperature and / or the reduction state meets the first set condition, the DC controller is used to reduce the current to adjust the single-chip battery voltage so that the fuel cell responds to the target power of the entire vehicle.

[0041] In step S10205, when the single-chip battery voltage is less than the first preset voltage threshold and the single-chip battery voltage meets the second set condition, the fuel cell is controlled to perform a fault shutdown.

[0042] Exemplarily, the first setting condition includes that the restoration state continues for a second preset time period, and the second setting condition is that when the single-chip battery voltage is less than the first preset voltage threshold for a third preset time period, the single-chip battery voltage is compared with the first preset voltage threshold again. If the single-chip battery voltage is still less than the first preset voltage threshold, the second setting condition is met.

[0043] Optionally, in another embodiment, the first setting condition may be that the stack temperature is greater than a second preset temperature threshold and / or the reduction state lasts for a second preset time, and the second setting condition may be that when the single cell voltage is less than the first preset voltage threshold for a third preset time, the single cell voltage is compared with the first preset voltage threshold again, and the single cell voltage is still less than the first preset voltage threshold; accordingly, when the fuel cell of the vehicle is started normally, step S104 may include: In step S10406, when the stack temperature is greater than or equal to the first preset temperature threshold and the updated first startup number is zero, the DC controller is controlled not to load current for a first preset time period, and the single cell voltage is compared with the first preset voltage threshold.

[0044] In step S10407, when the single-chip battery voltage is greater than or equal to the first preset voltage threshold, the DC controller is used to control the single-chip battery voltage to decrease to the second preset voltage threshold, so that the fuel cell enters a reduction state, until the stack temperature is greater than the second preset temperature threshold and / or the reduction state lasts for a second preset time, the DC controller is used to reduce the current to control the single-chip battery voltage, so that the fuel cell responds to the target power of the whole vehicle, and the first startup number is increased by one.

[0045] In step S10408, when the single-chip battery voltage is less than the first preset voltage threshold and lasts for a third preset time, the single-chip battery voltage is compared with the first preset voltage threshold again. If the single-chip battery voltage is less than the first preset voltage threshold, the fuel cell is controlled to shut down due to a fault.

[0046] Exemplarily, when the first preset temperature threshold is 0°C, the second preset temperature threshold is 60°C, the first preset time is 1s, the second preset time is 1min, the third preset time is 3s, the first preset voltage threshold is 0.6v, and the second preset voltage threshold is 0.2v, the FCU of the vehicle determines the difference between the stack temperature and the first preset temperature threshold. When the stack temperature is greater than or equal to 0°C and the updated first startup number is 0, the single-chip battery voltage is established, the DC controller is controlled not to load current and lasts for 1s, and the difference between the single-chip battery voltage and 0.6v is determined. When the voltage of the single cell is greater than or equal to 0.6v, based on the oxygen starvation control strategy, the DC controller controls the voltage of the single cell to be reduced to 0.2v, so that the fuel cell enters a reduction state, reduces the platinum oxide generated by the high voltage, and quickly heats the stack to generate a large amount of water, weakens the adsorption of the catalyst on the sulfonic acid group in the proton exchange membrane, and restores reversible decay until the stack temperature is greater than 60°C and / or the reduction state lasts for 1min, and the DC controller reduces the current to control the voltage of the single cell, so that the fuel cell responds to the target power of the whole vehicle, and the first startup number is increased by one. When the voltage of the single cell is less than 0.6v and lasts for 3s, the FCU of the vehicle is used to judge the size of the voltage of the single cell and 0.6v again. If the voltage of the single cell is less than 0.6v, the fuel cell is controlled to shut down due to a fault. The above process can make the fuel cell enter a reduction state, avoiding the platinum catalyst being reduced to platinum oxide at a high potential to affect the activity of the catalyst, thereby affecting the performance of the fuel cell or causing the loss of platinum, thereby avoiding aggravating the decline in fuel cell performance and avoiding affecting the overall performance of the fuel cell. Optionally, in another embodiment, the fuel cell of the vehicle is cold-started at a low temperature, and the step S104 also includes: In step S10408, when the stack temperature is lower than a first preset temperature threshold, the fuel cell is controlled to be cold-started at a low temperature, and the fuel cell stack is heated by the vehicle's PTC heater and water pump. When the stack temperature is higher than a preset start temperature, the DC controller is controlled not to draw current, and after a first preset time period, the single-cell battery voltage is compared with a first preset voltage threshold.

[0047] In step S10409, when the single-chip battery voltage is greater than or equal to the first preset voltage threshold, the DC controller is used to control the single-chip battery voltage to decrease to the second preset voltage threshold, so that the fuel cell enters a reduction state, until the stack temperature is greater than the second preset temperature threshold, the DC controller is used to reduce the current to control the single-chip battery voltage, so that the fuel cell responds to the target power of the whole vehicle, and the first startup number is increased by one.

[0048] In step S10410, when the single-chip battery voltage is less than the first preset voltage threshold and lasts for a third preset time, the single-chip battery voltage is compared with the first preset voltage threshold again. If the single-chip battery voltage is less than the first preset voltage threshold, the fuel cell is controlled to shut down due to a fault.

[0049] Exemplarily, when the stack temperature is less than 0°C, the fuel cell is controlled to start at low temperature, and the fuel cell stack is heated by the vehicle's PTC heater and water pump. When the stack temperature is greater than a preset start-up temperature, the single-chip battery voltage is established, the DC controller is controlled not to load current, and after 1 second, the single-chip battery voltage is compared with 0.6V. When the single-chip battery voltage is greater than or equal to 0.6V, the DC controller is used to control the single-chip battery voltage to drop to 0.2V, so that the fuel cell enters a reduction state, reduces the platinum oxide generated by the high voltage, and The stack heats up quickly, generating a large amount of water, weakening the adsorption of the catalyst on the sulfonic acid group in the proton exchange membrane, and restoring reversible decay until the stack temperature is greater than 60°C, and the DC controller reduces the current and re-establishes the single-chip battery voltage, so that the fuel cell responds to the target power of the vehicle, the fuel cell jumps to the operating state, and the first startup number is increased by one; when the single-chip battery voltage is less than 0.6v and lasts for 3s, the FCU of the vehicle again determines the size of the single-chip battery voltage and 0.6v. If the single-chip battery voltage is less than 0.6v, the fuel cell is controlled to shut down due to a fault. The above process can make the fuel cell enter a reduction state, avoiding the reduction of the platinum catalyst to platinum oxide at a high potential, which affects the activity of the catalyst, thereby affecting the performance of the fuel cell or causing the loss of platinum, thereby avoiding aggravating the decline in fuel cell performance and avoiding affecting the overall performance of the fuel cell.

[0050] Figure 4is a flow chart showing another method for controlling a fuel cell according to an exemplary embodiment. Figure 4 As shown, step S103 includes: In step S1031, when the stack temperature is greater than or equal to a preset start-up temperature threshold, the power battery SOC of the vehicle and the first start-up number of the vehicle are obtained.

[0051] In step S1032, when the SOC of the power battery is less than or equal to the preset SOC threshold, the first startup number is increased by one to obtain the updated first startup number of the fuel cell.

[0052] In step S1033, when the power battery SOC is greater than the preset SOC threshold and when the first startup number is zero, the single-chip cell voltage of the fuel cell is determined to control the fuel cell to enter a reduction state through the single-chip cell voltage to restore the reversible attenuation of the fuel cell.

[0053] Exemplarily, when the stack temperature is greater than or equal to the first preset temperature threshold, the SOC of the power battery of the vehicle and the first startup number of the vehicle are obtained, and when the SOC of the power battery is less than or equal to the preset SOC threshold, the first startup number is added by one to obtain the first startup number after the fuel cell is updated. For example: when the preset SOC threshold is 30%, the SOC of the current power battery of the vehicle is less than or equal to 30%, then the first startup number of the vehicle is +1, and recorded as the updated first startup number; that is, when the first startup number is 0, the updated first startup number is recorded as 1, or, when the first startup number is N, the updated first startup number is recorded as N+1; when the stack temperature is greater than or equal to the first preset temperature threshold, and when the first startup number is zero, the single-chip cell voltage of the fuel cell is determined, so as to control the fuel cell to enter a reduction state through the single-chip cell voltage, and restore the reversible attenuation of the fuel cell. When the stack outlet temperature is greater than or equal to a first preset temperature threshold and the vehicle has not performed recovery of the reversible decay of the fuel cell in the current cycle, the single-chip cell voltage of the fuel cell can be determined based on the stack outlet temperature, and the fuel cell can be controlled to enter a reduction state through the single-chip cell voltage to recover the reversible decay of the fuel cell, thereby avoiding the platinum catalyst being reduced to platinum oxide at a high potential to affect the activity of the catalyst, thereby affecting the performance of the fuel cell or causing the loss of platinum, and can avoid aggravating the decline in fuel cell performance and avoiding affecting the overall performance of the fuel cell.

[0054] Figure 5 is a flow chart of another method for controlling a fuel cell according to an exemplary embodiment. Figure 5 As shown, step S1033 includes: In step S10331, when the SOC of the power battery of the vehicle is greater than a preset SOC threshold and the first startup number is zero, the DC controller is controlled not to load current, and then the single-chip battery voltage is compared with a first preset voltage threshold.

[0055] In step S10332, when the single-chip battery voltage is greater than or equal to the first preset voltage threshold, the DC controller is used to control the single-chip battery voltage to drop to the second preset voltage threshold so that the fuel cell enters a reduction state. Until the stack temperature and / or the reduction state meets the first set condition, the DC controller is used to reduce the current to adjust the single-chip battery voltage so that the fuel cell responds to the target power of the vehicle.

[0056] In step S10333, when the single-chip battery voltage is less than the first preset voltage threshold and the single-chip battery voltage meets the second set condition, the fuel cell is controlled to perform a fault shutdown.

[0057] Exemplarily, when the SOC of the vehicle's power battery is greater than a preset SOC threshold and the first number of startup times is zero, the DC controller is controlled not to draw current, and then the single-chip battery voltage is compared with the first preset voltage threshold; when the single-chip battery voltage is greater than or equal to the first preset voltage threshold, the DC controller is used to control the single-chip battery voltage to decrease to a second preset voltage threshold, so that the fuel cell enters a reduction state, until the stack temperature and / or the reduction state meets a first set condition, and the DC controller is used to reduce the current to adjust the single-chip battery voltage, so that the fuel cell responds to the target power of the entire vehicle; when the single-chip battery voltage is less than the first preset voltage threshold, and the single-chip battery voltage meets the second set condition, the fuel cell is controlled to shut down due to a fault.

[0058] Exemplarily, when the preset SOC threshold is 30%, the first preset voltage threshold is 0.6v, the second preset voltage threshold is 0.2v, the first setting condition and the second setting condition are time thresholds, the first setting condition is 1min, and the second setting condition is 3s, the SOC of the power battery of the vehicle is greater than 30% and the first startup number is zero, the single-chip battery voltage is established, the DC controller is controlled not to load current, and the FCU of the vehicle determines the size of the single-chip battery voltage and 0.6v. When the single-chip battery voltage is greater than or equal to 0.6 v, based on the oxygen starvation control strategy, the DC controller controls the voltage of the single-chip battery to be reduced to 0.2v, so that the fuel cell enters a reduction state, reduces the platinum oxide generated by the high voltage, and quickly heats the stack to generate a large amount of water, weakens the adsorption of the catalyst on the sulfonic acid group in the proton exchange membrane, and restores reversible decay until the stack temperature is greater than 60°C and / or the reduction state lasts for 1min, and the DC controller reduces the current to control the voltage of the single-chip battery, so that the fuel cell responds to the target power of the whole vehicle, and the first startup number is increased by one. The FCU of the vehicle is used to judge the size of the single-chip battery voltage and 0.6v again. If the single-chip battery voltage is less than 0.6v and lasts for 3s, the fuel cell is controlled to shut down due to a fault. Through the above process, the fuel cell can enter a reduction state, avoiding the reduction of the platinum catalyst to platinum oxide at a high potential to affect the activity of the catalyst, thereby affecting the performance of the fuel cell or causing the loss of platinum, thereby avoiding aggravating the decline in fuel cell performance and avoiding affecting the overall performance of the fuel cell.

[0059] Figure 6 is a flow chart of another method for controlling a fuel cell according to an exemplary embodiment. Figure 6 As shown, step S1031 includes: In step S10311, when the vehicle is in the startup state, the first startup number of the fuel cell is determined based on a preset cycle and whether the fuel cell of the vehicle has entered a reduction state in the current cycle.

[0060] In step S10312, when the fuel cell has not entered the reduction state, the first startup times of the fuel cell are set to zero.

[0061] In step S10313, when the fuel cell enters the reduction state, it is determined whether the current cycle of the vehicle is the same as the cycle when the vehicle was last started.

[0062] In step S10314, when the current cycle of the vehicle is different from the cycle of the last startup state of the vehicle, the first startup number of the fuel cell is set to zero.

[0063] In step S10315, when the current cycle of the vehicle is the same as the cycle of the last startup state of the vehicle, the first startup number is increased by one to obtain an updated first startup number of the fuel cell.

[0064] Exemplarily, the first number of startups of the fuel cell is determined based on a preset cycle and whether the fuel cell of the vehicle has entered a reduction state in the current cycle. When the fuel cell has not entered a reduction state, the vehicle must enter a reduction state if the conditions for entering a reduction state are met in any cycle. When the fuel cell has entered a reduction state, if the vehicle obtains the first number of startups of the fuel cell of the vehicle, the preset cycle is set according to the battery status of the vehicle.

[0065] Optionally, in another embodiment, taking the current date as a preset period, step S1031 includes: In step S10316, when the vehicle is in the startup state, the current date is obtained and compared with the date when the vehicle was last in the startup state.

[0066] In step S10317, when the current date is increased compared to the date when the vehicle was last started, it is determined that there is a jump span in the current date, and the first startup times of the fuel cell are set to zero.

[0067] In step S10318, when the current date is the same as the date when the vehicle was last started, it is determined that there is no jump span in the current date, and the first startup number of the fuel cell remains the current startup number.

[0068] Exemplarily, the vehicle is first powered on at low voltage, the instrument is started, and then the vehicle is powered on at high voltage. When the vehicle is in the startup state, the current date is obtained, and the current date is the time date in the networking state, and the current date is compared with the date when the vehicle was last in the startup state. When the current date is compared with the date when the vehicle was last in the startup state, there is a jump span in the current date, and the first startup number of the fuel cell is set to zero. When the current date is the same as the date when the vehicle was last in the startup state, it is determined that there is no jump span in the current date, and the first startup number of the fuel cell remains the current startup number; for example: the current date obtained is M, when the date when the vehicle was last in the startup state increases compared to M, the first startup number of the fuel cell is recorded as 0, and when the date when the vehicle was last in the startup state is the same as M, the current startup number N is obtained, and the first startup number is recorded as N; the startup number of the fuel cell of the vehicle is refreshed every day through the vehicle controller of the vehicle.

[0069] Optionally, in another embodiment, comprising: In step S10319, when the first startup number is zero, the power battery SOC of the vehicle is obtained; when the power battery SOC is less than or equal to a preset SOC threshold, the first startup number is increased by one to obtain the first startup number after the fuel cell is updated; when the power battery SOC is greater than the preset SOC threshold, the first startup number is used as the first startup number after the fuel cell is updated.

[0070] Exemplarily, when the first startup number is zero and the rocker switch of the fuel cell is in the on state, the power battery SOC of the vehicle is obtained. When the power battery SOC is less than or equal to a preset SOC threshold, the first startup number is increased by one to obtain the updated first startup number. When the power battery SOC is greater than the preset SOC threshold, the first startup number is used as the updated first startup number. For example: when the preset SOC threshold is 30%, and the SOC of the vehicle's current power battery is less than or equal to 30%, the first startup number of the vehicle is +1, and recorded as the updated first startup number; that is, when the first startup number is 0, the updated first startup number is recorded as 1, or, when the first startup number is N, the updated first startup number is recorded as N+1; when the SOC of the vehicle's current power battery is greater than 30%, the first startup number of the vehicle is recorded as the updated first startup number, that is, when the first startup number is 0, the updated first startup number is recorded as 0, or, when the first startup number is N, the updated first startup number is recorded as N.

[0071] Optionally, the method further comprises: When the rocker switch of the fuel cell is in the off state, a shutdown command is generated by the vehicle controller of the vehicle, and the shutdown command is used to instruct the fuel cell controller to control the engine of the fuel cell to shut down.

[0072] Exemplarily, when the rocker switch of the fuel cell is in the off state, the circuit to which the fuel cell of the vehicle belongs is in the disconnected state, and a shutdown command is generated by the vehicle controller of the vehicle, and the shutdown command is used to instruct the fuel cell controller to control the engine of the fuel cell to shut down.

[0073] Through the above technical solution, the fuel cell of the vehicle can be controlled to enter a reduction state to restore the reversible attenuation of the fuel cell, thereby reducing the fuel cell attenuation rate and increasing the service life of the fuel cell. At the same time, the fuel cell power generation efficiency can be improved, the vehicle's hydrogen consumption can be reduced, the economy and competitive advantage can be improved, and the safety of the entire vehicle can be improved.

[0074] Figure 7 is a block diagram of a control device for a fuel cell according to an exemplary embodiment. Figure 7As shown, the control device 700 of the fuel cell includes: an acquisition module 701, a first control module 702 and a second control module 703; An acquisition module 701 is used to acquire the out-of-stack temperature of a vehicle fuel cell; The first control module 702 is used to determine the single cell voltage of the fuel cell based on the stack temperature when the stack temperature is less than a preset start-up temperature threshold, so as to control the fuel cell to enter a reduction state through the single cell voltage to restore the reversible attenuation of the fuel cell; and to determine the whole vehicle target power of the vehicle according to the first startup number and the state of the rocker switch of the fuel cell, and generate a startup instruction; The second control module 703 is used to obtain the power battery SOC of the vehicle when the stack temperature is greater than or equal to the preset starting temperature threshold, and to determine the single-chip cell voltage of the fuel cell when the power battery SOC is greater than the preset SOC threshold, so as to control the fuel cell to enter a reduction state through the single-chip cell voltage to restore the reversible attenuation of the fuel cell.

[0075] Optionally, the first control module 702 includes: a first comparison submodule, a first control submodule, and a second control submodule; A first comparison submodule, configured to compare the stack exit temperature with a first preset temperature threshold when the stack exit temperature is less than a preset start temperature threshold; A first control submodule is used to control the DC controller not to load current when the stack temperature is greater than or equal to a first preset temperature threshold, and to control the fuel cell to enter a reduction state to restore the reversible attenuation of the fuel cell according to the single-chip battery voltage, or to control the fuel cell to shut down due to a fault; The second control submodule is used for heating the fuel cell stack through the vehicle's PTC heater when the stack temperature is lower than the first preset temperature threshold, controlling the DC controller not to draw current after heating the stack, and controlling the fuel cell to enter a reduction state according to the single-chip cell voltage to restore the reversible attenuation of the fuel cell, or controlling the fuel cell to shut down due to a fault.

[0076] Optionally, the first control submodule and the second control submodule include: a second comparison submodule, a first restoration submodule, and a shutdown submodule; A second comparison submodule, used for comparing the single-chip battery voltage with a first preset voltage threshold after controlling the DC controller not to pull current; A first reduction submodule is used for, when the voltage of the single cell is greater than or equal to the first preset voltage threshold, controlling the voltage of the single cell to decrease to a second preset voltage threshold through the DC controller, so that the fuel cell enters a reduction state, until the stack temperature and / or the reduction state meets a first set condition, reducing the current through the DC controller to adjust the voltage of the single cell, so that the fuel cell responds to the target power of the whole vehicle; The shutdown submodule is used to control the fuel cell to perform a fault shutdown when the voltage of the single-chip battery is less than the first preset voltage threshold and the voltage of the single-chip battery meets a second set condition.

[0077] Optionally, the first control submodule includes: a boot times acquisition submodule, an update submodule, and a second restoration submodule; A startup times acquisition submodule, used for acquiring the power battery SOC of the vehicle and the first startup times of the vehicle when the stack temperature is greater than or equal to a preset startup temperature threshold; An updating submodule, configured to, when the SOC of the power battery is less than or equal to the preset SOC threshold, add one to the first startup number to obtain an updated first startup number of the fuel cell; The second reduction submodule is used to determine the single-chip cell voltage of the fuel cell when the power battery SOC is greater than the preset SOC threshold and when the first startup number is zero, so as to control the fuel cell to enter a reduction state through the single-chip cell voltage and restore the reversible attenuation of the fuel cell.

[0078] Optionally, the second restoring submodule is further used to: When the SOC of the power battery of the vehicle is greater than a preset SOC threshold and the first startup number is zero, the DC controller is controlled not to load current, and then the single-chip battery voltage is compared with a first preset voltage threshold; When the single cell voltage is greater than or equal to the first preset voltage threshold, the DC controller is used to control the single cell voltage to decrease to a second preset voltage threshold, so that the fuel cell enters a reduction state, until the stack temperature and / or the reduction state meets a first set condition, the DC controller is used to reduce the current to adjust the single cell voltage, so that the fuel cell responds to the target power of the entire vehicle; When the single cell voltage is less than the first preset voltage threshold and the single cell voltage meets a second set condition, the fuel cell is controlled to perform a fault shutdown.

[0079] Optionally, the boot times acquisition submodule is further used for: When the vehicle is in a startup state, determining a first startup number of the fuel cell based on a preset cycle and whether the fuel cell of the vehicle has entered a reduction state in a current cycle; When the fuel cell has not entered the reduction state, the first startup number of the fuel cell is set to zero; When the fuel cell enters the reduction state, determining whether the current cycle of the vehicle is the same as the cycle of the vehicle in the previous startup state; When the current cycle of the vehicle is different from the cycle of the vehicle in the previous startup state, setting the first startup number of the fuel cell to zero; When the current cycle of the vehicle is the same as the cycle of the vehicle in the previous startup state, the first startup number is increased by one to obtain an updated first startup number of the fuel cell.

[0080] Optionally, the device further comprises: a shutdown module; The shutdown module is used to generate a shutdown instruction through the vehicle controller of the vehicle when the rocker switch of the fuel cell is in the closed state. The shutdown instruction is used to instruct the fuel cell controller to control the engine of the fuel cell to shut down.

[0081] Through the above technical solution, the fuel cell of the vehicle can be controlled to enter a reduction state to restore the reversible attenuation of the fuel cell, thereby reducing the fuel cell attenuation rate and increasing the service life of the fuel cell. At the same time, the fuel cell power generation efficiency can be improved, the vehicle's hydrogen consumption can be reduced, the economy and competitive advantage can be improved, and the safety of the entire vehicle can be improved.

[0082] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0083] Figure 8 FIG. 8 is a block diagram of an electronic device 800 according to an exemplary embodiment. Figure 8 As shown, the electronic device 800 may include: a processor 801 , a memory 802 . The electronic device 800 may also include one or more of a multimedia component 803 , an input / output (I / O) interface 804 , and a communication component 805 .

[0084] The processor 801 is used to control the overall operation of the electronic device 800 to complete all or part of the steps in the above-mentioned fuel cell control method. The memory 802 is used to store various types of data to support the operation of the electronic device 800, and these data may include instructions for any application or method used to operate on the electronic device 800, as well as application-related data, such as contact data, sent and received messages, pictures, audio, video, etc. The memory 802 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (Static Random Access Memory, referred to as SRAM), electrically erasable programmable read-only memory (Electrically Erasable Programmable Read-Only Memory, referred to as EEPROM), erasable programmable read-only memory (Erasable Programmable Read-Only Memory, referred to as EPROM), programmable read-only memory (Programmable Read-Only Memory, referred to as PROM), read-only memory (Read-Only Memory, referred to as ROM), magnetic memory, flash memory, magnetic disk or optical disk. The multimedia component 803 may include a screen and an audio component. The screen may be, for example, a touch screen, and the audio component is used to output and / or input audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signal may be further stored in the memory 802 or sent through the communication component 805. The audio component also includes at least one speaker for outputting audio signals. The I / O interface 804 provides an interface between the processor 801 and other interface modules, and the above-mentioned other interface modules may be keyboards, mice, buttons, etc. These buttons may be virtual buttons or physical buttons. The communication component 805 is used for wired or wireless communication between the electronic device 800 and other devices. Wireless communication, such as Wi-Fi, Bluetooth, Near Field Communication (NFC), 2G, 3G, 4G, NB-IOT, eMTC, or other 5G, etc., or a combination of one or more of them, is not limited here. Therefore, the corresponding communication component 805 may include: Wi-Fi module, Bluetooth module, NFC module, etc.

[0085] In an exemplary embodiment, the electronic device 800 can be implemented by one or more application specific integrated circuits (ASIC), digital signal processors (DSP), digital signal processing devices (DSPD), programmable logic devices (PLD), field programmable gate arrays (FPGA), controllers, microcontrollers, microprocessors or other electronic components to execute the above-mentioned fuel cell control method.

[0086] In another exemplary embodiment, a computer-readable storage medium including program instructions is also provided, and when the program instructions are executed by a processor, the steps of the above-mentioned fuel cell control method are implemented. For example, the computer-readable storage medium can be the above-mentioned memory 802 including program instructions, and the above-mentioned program instructions can be executed by the processor 801 of the electronic device 800 to complete the above-mentioned fuel cell control method.

[0087] Fig. 9 is a block diagram of an electronic device 900 according to an exemplary embodiment. For example, the electronic device 900 may be provided as a server. Fig. 9 The electronic device 900 includes a processor 922, which may be one or more, and a memory 932 for storing a computer program executable by the processor 922. The computer program stored in the memory 932 may include one or more modules each corresponding to a set of instructions. In addition, the processor 922 may be configured to execute the computer program to perform the above-mentioned fuel cell control method.

[0088] In addition, the electronic device 900 may further include a power supply component 926 and a communication component 950, wherein the power supply component 926 may be configured to perform power management of the electronic device 900, and the communication component 950 may be configured to implement communication of the electronic device 900, for example, wired or wireless communication. In addition, the electronic device 900 may further include an input / output (I / O) interface 958. The electronic device 900 may operate based on an operating system stored in the memory 932.

[0089] In another exemplary embodiment, a computer-readable storage medium including program instructions is also provided, and when the program instructions are executed by the processor, the steps of the above-mentioned fuel cell control method are implemented. For example, the non-transitory computer-readable storage medium can be the above-mentioned memory 932 including program instructions, and the above-mentioned program instructions can be executed by the processor 922 of the electronic device 900 to complete the above-mentioned fuel cell control method.

[0090] In another exemplary embodiment, a computer program product is also provided. The computer program product includes a computer program executable by a programmable device. The computer program has a code portion for executing the above-mentioned fuel cell control method when executed by the programmable device.

[0091] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0092] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0093] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A method for controlling a fuel cell, characterized in that: include: Obtaining the outlet temperature of the vehicle fuel cell; When the stack exit temperature is less than a preset start-up temperature threshold, determining a single cell voltage of the fuel cell based on the stack exit temperature, so as to control the fuel cell to enter a reduction state through the single cell voltage, and restore the reversible attenuation of the fuel cell; When the stack temperature is greater than or equal to a preset starting temperature threshold, the power battery SOC of the vehicle is obtained, and when the power battery SOC is greater than a preset SOC threshold, the single-cell voltage of the fuel cell is determined, so as to control the fuel cell to enter a reduction state through the single-cell voltage to restore the reversible attenuation of the fuel cell.

2. The method according to claim 1, characterized in that: When the stack exit temperature is less than a preset start-up temperature threshold, the single cell voltage of the fuel cell is determined based on the stack exit temperature, so as to control the fuel cell to enter a reduction state through the single cell voltage, and restore the reversible attenuation of the fuel cell, including: When the stack exit temperature is less than a preset start temperature threshold, comparing the stack exit temperature with a first preset temperature threshold; When the stack temperature is greater than or equal to a first preset temperature threshold, the DC controller is controlled not to load current, and the fuel cell is controlled to enter a reduction state according to the single-chip battery voltage to restore the reversible attenuation of the fuel cell, or the fuel cell is controlled to shut down due to a fault; When the stack temperature is lower than the first preset temperature threshold, the fuel cell stack is heated by the vehicle's PTC heater, and after the stack is heated, the DC controller is controlled not to draw current, and the fuel cell is controlled to enter a reduction state according to the single-chip cell voltage to restore the reversible attenuation of the fuel cell, or the fuel cell is controlled to shut down due to a fault.

3. The method according to claim 2, characterized in that The controlling DC controller does not pull current, and controls the fuel cell to enter a reduction state to restore the reversible attenuation of the fuel cell according to the voltage of the single-chip battery, or controls the fuel cell to shut down due to a fault, including: After controlling the DC controller not to draw current, comparing the single-chip battery voltage with a first preset voltage threshold; When the single cell voltage is greater than or equal to the first preset voltage threshold, the DC controller is used to control the single cell voltage to decrease to a second preset voltage threshold, so that the fuel cell enters a reduction state, until the stack temperature and / or the reduction state meets a first set condition, the DC controller is used to reduce the current to adjust the single cell voltage, so that the fuel cell responds to the target power of the entire vehicle; When the single cell voltage is less than the first preset voltage threshold and the single cell voltage meets a second set condition, the fuel cell is controlled to fail and shut down.

4. The method according to claim 1, characterized in that: When the stack temperature is greater than or equal to a preset start-up temperature threshold, the SOC of the power battery of the vehicle is obtained, and when the SOC of the power battery of the vehicle is greater than a preset SOC threshold, the single-chip cell voltage of the fuel cell is determined, so as to control the fuel cell to enter a reduction state through the single-chip cell voltage, and restore the reversible attenuation of the fuel cell, including: When the stack temperature is greater than or equal to a preset start-up temperature threshold, obtaining the power battery SOC of the vehicle and the first start-up number of the vehicle; When the power battery SOC is greater than the preset SOC threshold and the first startup number is zero, the single cell voltage of the fuel cell is determined to control the fuel cell to enter a reduction state through the single cell voltage to restore the reversible attenuation of the fuel cell.

5. The method according to claim 4, characterized in that When the power battery SOC is greater than the preset SOC threshold and the first startup number is zero, determining the single cell voltage of the fuel cell, so as to control the fuel cell to enter a reduction state through the single cell voltage, and restore the reversible attenuation of the fuel cell, comprising: When the SOC of the power battery of the vehicle is greater than a preset SOC threshold and the first startup number is zero, the DC controller is controlled not to load current, and then the single-chip battery voltage is compared with a first preset voltage threshold; When the single cell voltage is greater than or equal to the first preset voltage threshold, the DC controller is used to control the single cell voltage to decrease to a second preset voltage threshold, so that the fuel cell enters a reduction state, until the stack temperature and / or the reduction state meets a first set condition, the DC controller is used to reduce the current to adjust the single cell voltage, so that the fuel cell responds to the target power of the entire vehicle; When the single cell voltage is less than the first preset voltage threshold and the single cell voltage meets a second set condition, the fuel cell is controlled to fail and shut down.

6. The method according to claim 4, characterized in that The obtaining of a first startup number of the fuel cell of the vehicle includes: When the vehicle is in a startup state, determining a first startup number of the fuel cell based on a preset cycle and whether the fuel cell of the vehicle has entered a reduction state in a current cycle; When the fuel cell enters a reduction state, determining whether a current cycle of the vehicle is the same as a cycle of a previous start-up state of the vehicle; When the current cycle of the vehicle is different from the cycle of the vehicle in the previous startup state, setting the first startup number of the fuel cell to zero; When the current cycle of the vehicle is the same as the cycle of the vehicle in the previous startup state, the first startup number is increased by one to obtain an updated first startup number of the fuel cell.

7. The method according to claim 1, characterized in that The method further comprises: When the rocker switch of the fuel cell is in the off state, a shutdown instruction is generated by the vehicle controller of the vehicle, and the shutdown instruction is used to instruct the fuel cell controller to control the engine of the fuel cell to shut down.

8. A control device for a fuel cell, characterized in that: include: An acquisition module, used to obtain the out-of-stack temperature of a vehicle fuel cell; A first control module, configured to determine a single cell voltage of the fuel cell based on the stack outlet temperature when the stack outlet temperature is less than a preset start-up temperature threshold, so as to control the fuel cell to enter a reduction state through the single cell voltage to restore the reversible attenuation of the fuel cell; The second control module obtains the SOC of the power battery of the vehicle when the stack temperature is greater than or equal to a preset starting temperature threshold, and determines the single-cell voltage of the fuel cell when the power battery SOC is greater than a preset SOC threshold, so as to control the fuel cell to enter a reduction state through the single-cell voltage to restore the reversible attenuation of the fuel cell.

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

10. A vehicle, characterized in that: include: The electronic device as claimed in claim 9.

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