Control methods, devices, electronic equipment and vehicles for fuel cells

Abstract

This disclosure relates to a control method, apparatus, electronic device, and vehicle for a fuel cell. The method includes: acquiring the stack outlet temperature of the vehicle's fuel cell; when the stack outlet temperature is lower than a preset start-up temperature threshold, determining the individual cell voltage of the fuel cell based on the stack outlet temperature, so as to control the fuel cell to enter a reduction state through the individual cell voltage and restore the reversible degradation of the fuel cell; when the stack outlet temperature is greater than or equal to the preset start-up temperature threshold, acquiring the state of charge (SOC) of the vehicle's power battery, and when the power battery SOC is greater than the preset SOC threshold, determining the individual cell voltage of the fuel cell, so as to control the fuel cell to enter a reduction state through the individual cell voltage and restore the reversible degradation of the fuel cell. This method can reduce the fuel cell degradation rate, improve the fuel cell's lifespan and power generation efficiency, thereby reducing vehicle hydrogen consumption and improving economic efficiency and vehicle safety.

Description

Technical Field

[0001] This disclosure relates to the field of fuel cell vehicle control technology, specifically to a fuel cell control method, device, electronic equipment, and vehicle. Background Technology

[0002] Currently, hydrogen fuel cell vehicles are in a phase of rapid development. Reversible degradation of the fuel cell system in these vehicles is a common phenomenon during operation; this temporary performance decline can be recovered under appropriate conditions. The occurrence of reversible degradation involves a variety of complex factors that can affect fuel cell performance simultaneously or individually. If reversible degradation of the fuel cell system is not addressed for an extended period, it may evolve into irreversible degradation, accelerating the degradation rate. Therefore, how to recover from partial reversible degradation in fuel cells is a pressing technical problem that needs to be solved. Summary of the Invention

[0003] To overcome the problems existing in the related technologies, this disclosure provides a control method, device, electronic equipment and vehicle for a fuel cell.

[0004] According to a first aspect of the present disclosure, a method for controlling a fuel cell is provided, comprising:

[0005] Obtain the stack outlet temperature of the vehicle's fuel cell;

[0006] When the stack temperature is lower than the preset start-up temperature threshold, the cell voltage of the fuel cell is determined based on the stack temperature, so as to control the fuel cell to enter the reduction state and restore the reversible degradation of the fuel cell by controlling the cell voltage.

[0007] When the stack temperature is greater than or equal to a preset start-up temperature threshold, the SOC of the vehicle's power battery is obtained, and when the SOC of the power battery is greater than the preset SOC threshold, the voltage of a single cell of the fuel cell is determined, so as to control the fuel cell to enter the reduction state through the voltage of the single cell and restore the reversible degradation of the fuel cell.

[0008] Optionally, when the stack exit temperature is lower than a preset start-up temperature threshold, determining the individual cell voltage of the fuel cell based on the stack exit temperature, and controlling the fuel cell to enter a reduction state through the individual cell voltage to restore the reversible degradation of the fuel cell, includes:

[0009] When the discharge temperature is lower than the preset start-up temperature threshold, the discharge temperature is compared with the first preset temperature threshold.

[0010] When the stack temperature is greater than or equal to the first preset temperature threshold, the DC controller is controlled not to draw current, and the fuel cell is controlled to enter the reduction state to restore the reversible degradation of the fuel cell according to the voltage of the single cell, or the fuel cell is controlled to shut down due to a fault.

[0011] When the stack temperature is lower than the first preset temperature threshold, the fuel cell stack is heated by the vehicle's PTC heater. After heating the stack, the DC controller is controlled not to draw current, and the fuel cell is controlled to enter the reduction state to restore the reversible degradation of the fuel cell according to the voltage of the individual cells, or the fuel cell is controlled to shut down due to a fault.

[0012] Optionally, the control DC controller does not draw current and controls the fuel cell to enter a reduction state to restore the reversible degradation of the fuel cell based on the voltage of the individual cells, or controls the fuel cell to shut down due to a fault, including:

[0013] After controlling the DC controller to prevent it from drawing load current, the voltage of the single battery cell is compared with a first preset voltage threshold.

[0014] When the voltage of the single cell is greater than or equal to the first preset voltage threshold, the DC controller controls the voltage of the single cell to be reduced to the second preset voltage threshold so that the fuel cell enters the reduction state. Until the stack temperature and / or the reduction state meet the first set condition, the DC controller reduces the current to adjust the voltage of the single cell so that the fuel cell responds to the target power of the vehicle.

[0015] When the voltage of a single cell is less than the first preset voltage threshold and the voltage of a single cell meets the second set condition, the fuel cell is controlled to shut down due to a fault.

[0016] Optionally, the step of obtaining the SOC of the vehicle's power battery when the stack temperature is greater than or equal to a preset start-up temperature threshold, and determining the individual cell voltage of the fuel cell when the SOC of the vehicle's power battery is greater than the preset SOC threshold, so as to control the fuel cell to enter a reduction state through the individual cell voltage and restore the reversible degradation of the fuel cell, includes:

[0017] When the discharge temperature is greater than or equal to a preset start-up temperature threshold, the SOC of the vehicle's power battery and the first number of times the vehicle is started are obtained.

[0018] When the SOC of the power battery is less than or equal to the preset SOC threshold, the first number of startups is incremented by one to obtain the updated first number of startups of the fuel cell;

[0019] When the SOC of the power battery is greater than the preset SOC threshold, and the first number of power-on cycles is zero, the voltage of a single cell of the fuel cell is determined, so as to control the fuel cell to enter the restoration state through the voltage of the single cell and restore the reversible degradation of the fuel cell.

[0020] Optionally, when the SOC of the power battery is greater than the preset SOC threshold and the first number of power-on cycles is zero, determining the individual cell voltage of the fuel cell to control the fuel cell to enter a reduction state and restore the reversible degradation of the fuel cell through the individual cell voltage includes:

[0021] When the SOC of the vehicle's power battery is greater than the preset SOC threshold and the first number of power-on cycles is zero, the DC controller is controlled to not draw current, and the voltage of the single battery cell is compared with the first preset voltage threshold.

[0022] When the voltage of the single cell is greater than or equal to the first preset voltage threshold, the DC controller controls the voltage of the single cell to be reduced to the second preset voltage threshold so that the fuel cell enters the reduction state. Until the stack temperature and / or the reduction state meet the first set condition, the DC controller reduces the current to adjust the voltage of the single cell so that the fuel cell responds to the target power of the vehicle.

[0023] When the voltage of a single cell is less than the first preset voltage threshold and the voltage of a single cell meets the second set condition, the fuel cell is controlled to shut down due to a fault.

[0024] Optionally, obtaining the first number of times the vehicle's fuel cell is powered on includes:

[0025] When the vehicle is in the start-up state, the first number of times the fuel cell is started is determined based on a preset period and whether the fuel cell of the vehicle has entered the restoration state in the current period.

[0026] When the fuel cell has not entered the restoration state, the first number of times the fuel cell is turned on is set to zero;

[0027] When the fuel cell enters the recovery state, it is determined whether the current cycle of the vehicle is the same as the cycle of the vehicle in the previous start-up state;

[0028] When the current cycle of the vehicle is different from the cycle of the vehicle's previous start-up state, the first start-up count of the fuel cell is set to zero;

[0029] When the current cycle of the vehicle is the same as the cycle when the vehicle was previously started, the first start-up count is incremented by one to obtain the updated first start-up count of the fuel cell.

[0030] Optionally, the method further includes:

[0031] When the rocker switch of the fuel cell is in the closed state, the vehicle controller generates a shutdown command, which instructs the fuel cell controller to shut down the fuel cell engine.

[0032] According to a second aspect of the present disclosure, a control device for a fuel cell is provided, comprising:

[0033] The acquisition module is used to acquire the stack outlet temperature of the vehicle's fuel cell;

[0034] The first control module is used to determine the cell voltage of the fuel cell based on the stack temperature when the stack temperature is less than the preset start-up temperature threshold, so as to control the fuel cell to enter the reduction state through the cell voltage and restore the reversible degradation of the fuel cell.

[0035] The second control module acquires the SOC of the vehicle's power battery when the stack temperature is greater than or equal to a preset start-up temperature threshold, and determines the individual 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 the reduction state through the individual cell voltage and restore the reversible degradation of the fuel cell.

[0036] According to a third aspect of the present disclosure, an electronic device is provided, comprising:

[0037] A memory on which computer programs are stored;

[0038] A processor is 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 present disclosure.

[0039] According to a fourth aspect of the present disclosure, a vehicle is provided, including: the electronic device described in the third aspect of the present disclosure.

[0040] In the above technical solution, the stack outlet temperature of the vehicle fuel cell is obtained. When the stack outlet temperature is lower than a preset start-up temperature threshold, the individual cell voltage of the fuel cell is determined based on the stack outlet temperature. The individual cell voltage is used to control the fuel cell to enter a reduction state, restoring the reversible degradation of the fuel cell. When the stack outlet temperature is greater than or equal to the preset start-up temperature threshold, the state of charge (SOC) of the vehicle's power battery is obtained. When the SOC of the power battery is greater than the preset SOC threshold, the individual cell voltage of the fuel cell is determined. The individual cell voltage is used to control the fuel cell to enter a reduction state, restoring the reversible degradation of the fuel cell. Through this technical solution, the fuel cell can be controlled to enter a reduction state to restore the reversible degradation of the fuel cell, thereby reducing the fuel cell degradation rate, increasing the fuel cell's lifespan, improving fuel cell power generation efficiency, reducing vehicle hydrogen consumption, improving economic efficiency and competitive advantage, and enhancing overall vehicle safety.

[0041] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0042] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0043] Figure 1 This is a flowchart illustrating a control method for a fuel cell according to an exemplary embodiment.

[0044] Figure 2 This is a flowchart illustrating another control method for a fuel cell according to an exemplary embodiment.

[0045] Figure 3 This is a flowchart illustrating another control method for a fuel cell according to an exemplary embodiment.

[0046] Figure 4 This is a flowchart illustrating another control method for a fuel cell according to an exemplary embodiment.

[0047] Figure 5 This is a flowchart illustrating yet another control method for a fuel cell according to an exemplary embodiment.

[0048] Figure 6 This is a flowchart illustrating yet another control method for a fuel cell according to an exemplary embodiment.

[0049] Figure 7 This is a block diagram illustrating a control device for a fuel cell according to an exemplary embodiment.

[0050] Figure 8 This is a block diagram illustrating an electronic device 800 according to an exemplary embodiment.

[0051] Figure 9 This is a block diagram illustrating an electronic device 900 according to an exemplary embodiment. Detailed Implementation

[0052] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0053] It is understood that the terms "first," "second," etc., used in this disclosure are used to describe various types of information, but such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another and do not indicate a particular order or degree of importance.

[0054] It is further understood that although operations are described in a specific order in the accompanying drawings in the embodiments of this disclosure, this should not be construed as requiring these operations to be performed in the specific order or serial order shown, or requiring all of the shown operations to be performed to obtain the desired result. In certain environments, multitasking and parallel processing may be advantageous.

[0055] It should be noted that all actions involving the acquisition of signals, information, or data in this disclosure are carried out in compliance with the relevant data protection laws and policies of the country where the location is situated, and with authorization from the owner of the relevant device.

[0056] The applicant has observed that in existing technologies, reversible degradation of fuel cell systems is a common phenomenon during operation. The primary influencing factor is the state change of the platinum catalyst. At high potentials, the platinum catalyst may be reduced to platinum oxide, which may temporarily affect the catalyst's activity and thus the fuel cell's performance. When the potential increases further, platinum may also be oxidized to platinum ions, potentially leading to platinum loss and further exacerbating the performance decline, directly impacting the overall performance of the fuel cell. Secondly, during startup, undergassing of individual cells can cause membrane dryness during loading, which may also trigger reverse polarity. Reverse polarity refers to the reversal of positive and negative electrodes due to abnormal potentials within some individual cells during operation. This phenomenon not only leads to a sharp decline in the performance of individual cells but may also cause irreversible damage to the entire fuel cell system. Reverse polarity accelerates electrolyte membrane degradation and catalyst deactivation, further deteriorating fuel cell performance. Therefore, the applicant proposes a fuel cell control method to address these issues. The fuel cell control method provided in this disclosure is described below.

[0057] Figure 1 This is a flowchart illustrating a control method for a fuel cell according to an exemplary embodiment, such as... Figure 1 As shown, the method includes:

[0058] In step S101, the stack outlet temperature of the vehicle fuel cell is obtained.

[0059] In step S102, when the stack exit temperature is lower than the preset start-up temperature threshold, the cell voltage of the fuel cell is determined based on the stack exit temperature, so as to control the fuel cell to enter the reduction state through the cell voltage and restore the reversible degradation of the fuel cell.

[0060] In step S103, when the stack temperature is greater than or equal to the preset start-up temperature threshold, the SOC of the vehicle's power battery is obtained, and when the SOC of the power battery is greater than the preset SOC threshold, the voltage of a single cell of the fuel cell is determined, so as to control the fuel cell to enter the reduction state through the voltage of the single cell and restore the reversible degradation of the fuel cell.

[0061] For example, when the vehicle is in the start-up state, the stack temperature of the vehicle's fuel cell is acquired. Based on the stack temperature and a preset start-up temperature threshold, it is determined whether the vehicle's fuel cell should enter a reduction state. When the stack temperature is lower than the preset start-up temperature threshold, the vehicle needs to enter the reduction state. Based on the stack temperature, the individual cell voltage of the fuel cell is determined, and the individual cell voltage is used to control the fuel cell to enter the reduction state and restore the reversible degradation of the fuel cell. When the stack temperature is greater than or equal to the preset start-up temperature threshold, the state of charge (SOC) of the vehicle's power battery is acquired. When the power battery SOC is greater than the preset SOC threshold, the individual cell voltage of the fuel cell is determined, and the individual cell voltage is used to control the fuel cell to enter the reduction state and restore the reversible degradation of the fuel cell. In order to avoid damage caused by the vehicle's fuel cell frequently entering the reduction state when the power battery SOC is greater than the preset SOC threshold, the reduction state is only executed once per cycle when the power battery SOC is greater than the preset SOC threshold.

[0062] For example, when a vehicle is running and the rocker switch of its fuel cell is on, the vehicle's fuel cell outlet temperature is acquired. The vehicle controller compares this outlet temperature with a preset start-up temperature threshold. If the preset start-up temperature threshold is 0°C, and the outlet temperature is less than 0°C, the fuel cell must enter a recovery state. Based on the outlet temperature, the individual cell voltage of the fuel cell is determined, and the fuel cell is controlled to enter the recovery state to restore its reversible degradation. If the outlet temperature is greater than or equal to 0°C, the vehicle's battery SOC is acquired and compared with a preset SOC threshold. Assuming the preset SOC threshold is 30%, if the battery SOC is greater than 30%, it is determined whether the vehicle has entered a recovery state in the current cycle. If the fuel cell has not entered a recovery state in the current cycle, the individual cell voltage is determined, and the fuel cell is controlled to enter the recovery state to restore its reversible degradation. This reduces the fuel cell degradation rate and increases its lifespan.

[0063] The above technical solution can control the vehicle's fuel cell to enter a reduction state, thereby restoring the reversible degradation of the fuel cell, reducing the fuel cell degradation rate, increasing the fuel cell's service life, improving fuel cell power generation efficiency, reducing vehicle hydrogen consumption, enhancing economic efficiency and competitive advantage, and improving overall vehicle safety.

[0064] Figure 2 This is a flowchart illustrating another control method for a fuel cell according to an exemplary embodiment, such as... Figure 2As shown, step S102 includes:

[0065] In step S1021, when the discharge temperature is lower than the preset start-up temperature threshold, the discharge temperature is compared with the first preset temperature threshold.

[0066] In step S1022, when the stack temperature is greater than or equal to the first preset temperature threshold, the DC controller is controlled not to draw current, and the fuel cell is controlled to enter the reduction state to restore the reversible degradation of the fuel cell according to the voltage of the single cell, or the fuel cell is controlled to shut down due to a fault.

[0067] 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. After heating the stack, the DC controller is controlled not to draw current, and the fuel cell is controlled to enter the reduction state to restore the reversible degradation of the fuel cell according to the voltage of the single cell, or the fuel cell is controlled to shut down due to a fault.

[0068] For example, when the stack temperature is lower than a preset start-up temperature threshold, the vehicle's fuel cell must enter a reduction state. The stack temperature is compared with a first preset temperature threshold, and the start-up mode of the fuel cell is determined 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, the DC controller is controlled not to draw current, and the fuel cell is controlled to enter a reduction state to restore the reversible degradation of the fuel cell according to the voltage of the individual 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 vehicle's fuel cell performs a low-temperature cold start. The vehicle's PTC (Positive Temperature Coefficient) heater and water pump heat the fuel cell stack. After heating the stack, the DC controller is controlled not to draw current, and the fuel cell is controlled to enter a reduction state to restore the reversible degradation of the fuel cell according to the voltage of the individual cell, or the fuel cell is controlled to shut down due to a fault. When the vehicle's fuel cell performs a low-temperature cold start, the heat generated by the fuel cell in the reduction state, along with the vehicle's PTC heater, heats the fuel cell stack, saving the vehicle's power battery power, shortening the heating time, and reducing the fuel cell's start-up time. In winter, when the ambient temperature is low and the temperature difference is large, the benefits of heating by the heat generated by the fuel cell in the reduction state are greater than in summer when the temperature difference is smaller. In summer, when the temperature difference is small, the benefits of reducing platinum oxide when the fuel cell is in the reduction state are greater than in winter when the ambient temperature is low and the temperature difference is large.

[0069] The above-mentioned scheme can determine the start-up mode of the vehicle's fuel cell based on the stack temperature and a first preset threshold when the vehicle has not performed reversible degradation recovery of the fuel cell in the current cycle during fuel cell operation. It can then perform reversible degradation recovery of the fuel cell or control the fuel cell to shut down due to malfunction. This avoids the reduction of platinum catalyst to platinum oxide at high potential, which affects the activity of the catalyst and thus affects the performance of the fuel cell or leads to platinum loss. It can avoid aggravating the decline in fuel cell performance and avoid affecting the overall performance of the fuel cell.

[0070] Figure 3 This is a flowchart illustrating another control method for a fuel cell according to an exemplary embodiment, such as... Figure 3 As shown, in steps S1022 and S1023, the DC controller does not draw current and controls the fuel cell to enter a reduction state to restore the reversible degradation of the fuel cell based on the voltage of the single cell, or controls the fuel cell to shut down due to a fault, including:

[0071] In step S10203, after controlling the DC controller to not draw current, the voltage of the single battery cell is compared with the first preset voltage threshold.

[0072] For example, after controlling the DC controller to not draw current, the voltage of a single cell in the fuel cell system is kept stable for a first preset time. After the voltage of a single cell is stable, the voltage of the single cell is compared with a first preset voltage threshold.

[0073] In step S10204, when the voltage of the single cell is greater than or equal to the first preset voltage threshold, the DC controller controls the voltage of the single cell to be reduced to the second preset voltage threshold so that the fuel cell enters the reduction state. Until the stack temperature and / or the reduction state meet the first set conditions, the DC controller reduces the current to adjust the voltage of the single cell so that the fuel cell responds to the target power of the vehicle.

[0074] In step S10205, when the voltage of the single cell is less than the first preset voltage threshold and the voltage of the single cell meets the second set condition, the fuel cell is controlled to shut down due to a fault.

[0075] For example, the first setting condition includes the restoration state lasting for a second preset duration. The second setting condition is that when the voltage of a single battery cell is less than the first preset voltage threshold for a third preset duration, the voltage of the single battery cell is compared with the first preset voltage threshold again. If the voltage of the single battery cell is still less than the first preset voltage threshold, then the second setting condition is satisfied.

[0076] Optionally, in another embodiment, the first setting condition may be that the discharge temperature is greater than a second preset temperature threshold and / or the reduction state lasts for a second preset duration. The second setting condition may be that when the voltage of a single cell is less than the first preset voltage threshold for a third preset duration, the voltage of the single cell is compared with the first preset voltage threshold again, and the voltage of the single cell is still less than the first preset voltage threshold. Accordingly, when the fuel cell of the vehicle is started normally, step S104 may include:

[0077] In step S10406, when the stack temperature is greater than or equal to the first preset temperature threshold and the updated first power-on count is zero, the DC controller is controlled not to draw current and continues for a first preset duration to compare the single cell voltage with the first preset voltage threshold.

[0078] In step S10407, when the voltage of the single cell is greater than or equal to the first preset voltage threshold, the DC controller controls the voltage of the single cell to be reduced to the second preset voltage threshold so that the fuel cell enters the reduction state. Until the stack temperature is greater than the second preset temperature threshold and / or the reduction state lasts for a second preset duration, 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 vehicle, and the first start-up count is incremented by one.

[0079] In step S10408, when the voltage of the single cell is less than the first preset voltage threshold and continues for a third preset time, the voltage of the single cell is compared with the first preset voltage threshold again. If the voltage of the single cell is less than the first preset voltage threshold, the fuel cell is controlled to shut down due to a fault.

[0080] For example, when the first preset temperature threshold is 0℃, the second preset temperature threshold is 60℃, the first preset duration is 1s, the second preset duration is 1min, the third preset duration is 3s, the first preset voltage threshold is 0.6V, and the second preset voltage threshold is 0.2V, the vehicle's FCU determines the magnitude of the discharge temperature relative to the first preset temperature threshold. When the discharge temperature is greater than or equal to 0℃ and the updated first power-on count is 0, a single-cell battery voltage is established, the DC controller is controlled not to draw current for 1s, and the magnitude of the single-cell battery voltage relative to 0.6V is determined. When the voltage of a single cell is greater than or equal to 0.6V, based on an oxygen starvation control strategy, the DC controller reduces the voltage of the single cell to 0.2V, causing the fuel cell to enter a reduction state. This reduces the platinum oxide generated at high voltage and rapidly heats the stack, generating a large amount of water. This weakens the adsorption of sulfonic acid groups in the proton exchange membrane by the catalyst, restoring reversible degradation. The process continues until the stack exit temperature exceeds 60°C and / or the reduction state lasts for 1 minute. At this point, the DC controller reduces the current to control the voltage of the single cell, enabling the fuel cell to respond to the vehicle's target power, and the first start-up count is incremented. When the voltage of a single cell is less than 0.6V and remains below 0.6V for 3 seconds, the vehicle's FCU again checks the voltage relative to 0.6V. If the voltage is less than 0.6V, the fuel cell is shut down due to a fault. The above process enables the fuel cell to enter a reduced state, preventing the platinum catalyst from being reduced to platinum oxide at high potential, which would affect the catalyst's activity and thus impact fuel cell performance or lead to platinum loss. This prevents further degradation of fuel cell performance and avoids affecting the overall performance of the fuel cell. Optionally, in another embodiment, the vehicle's fuel cell undergoes a low-temperature cold start. Step S104 further includes:

[0081] In step S10408, when the stack temperature is less than the first preset temperature threshold, the fuel cell is controlled to start cold 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 the preset start temperature, the DC controller is controlled not to draw current, and after a first preset duration, the voltage of the single cell is compared with the first preset voltage threshold.

[0082] In step S10409, when the voltage of the single cell is greater than or equal to the first preset voltage threshold, the DC controller controls the voltage of the single cell to be reduced to the second preset voltage threshold so that the fuel cell enters the reduction state. Until the stack temperature is greater than the second preset temperature threshold, 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 vehicle and the first start-up count is incremented by one.

[0083] In step S10410, when the voltage of the single cell is less than the first preset voltage threshold and continues for a third preset time, the voltage of the single cell is compared with the first preset voltage threshold again. If the voltage of the single cell is less than the first preset voltage threshold, the fuel cell is controlled to shut down due to a fault.

[0084] For example, when the outlet temperature is below 0°C, the fuel cell is controlled for low-temperature cold start, and the fuel cell stack is heated by the vehicle's PTC heater and water pump. When the outlet temperature is above the preset start-up temperature, the individual cell voltage is established, and the DC controller is controlled not to draw current. After 1 second, the individual cell voltage is compared with 0.6V. When the individual cell voltage is greater than or equal to 0.6V, the DC controller controls the individual cell voltage to decrease to 0.2V, so that the fuel cell enters a reduction state, reducing the platinum oxide generated by the high voltage, and... The fuel cell stack rapidly heats up, generating a large amount of water. This weakens the catalyst's adsorption of sulfonic acid groups in the proton exchange membrane, reversibly restoring the degradation process. Once the stack exit temperature exceeds 60°C, the DC controller reduces the current, re-establishing the individual cell voltage to enable the fuel cell to respond to the vehicle's target power. The fuel cell then switches to operating mode, and the first start-up count is incremented. If the individual cell voltage is less than 0.6V for 3 seconds, the vehicle's FCU again checks the voltage against 0.6V. If the voltage is still less than 0.6V, the fuel cell is shut down. This process allows the fuel cell to enter a reduced state, preventing the platinum catalyst from being reduced to platinum oxide at high potential, which could affect catalyst activity and thus fuel cell performance or lead to platinum loss. This prevents further degradation of fuel cell performance and avoids impacting the overall performance of the fuel cell.

[0085] Figure 4 This is a flowchart illustrating another control method for a fuel cell according to an exemplary embodiment, such as... Figure 4 As shown, step S103 includes:

[0086] In step S1031, when the stack temperature is greater than or equal to the preset start-up temperature threshold, the SOC of the vehicle's power battery and the first number of times the vehicle is started are obtained.

[0087] In step S1032, when the SOC of the power battery is less than or equal to the preset SOC threshold, the first start-up count is incremented by one to obtain the first start-up count of the fuel cell after the update.

[0088] In step S1033, when the SOC of the power battery is greater than the preset SOC threshold and the first number of start-ups is zero, the voltage of a single cell of the fuel cell is determined so as to control the fuel cell to enter the reduction state through the voltage of the single cell and restore the reversible degradation of the fuel cell.

[0089] For example, when the discharge temperature is greater than or equal to a first preset temperature threshold, the SOC of the vehicle's power battery and the first number of times the vehicle is started are obtained. When the SOC of the power battery is less than or equal to the preset SOC threshold, the first number of times the vehicle is started is incremented by one to obtain the updated first number of times the fuel cell is started. 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 number of times the vehicle is started is incremented by 1 and recorded as the updated first number of times the vehicle is started. That is, when the first number of times the vehicle is started is 0, the updated first number of times the vehicle is started is recorded as 1, or when the first number of times the vehicle is started is N, the updated first number of times the vehicle is started is recorded as N+1. When the discharge temperature is greater than or equal to the first preset temperature threshold and the first number of times the vehicle is started is zero, the voltage of a single cell of the fuel cell is determined so as to control the fuel cell to enter the reduction state through the voltage of the single cell and restore the reversible degradation of the fuel cell. When the outlet temperature is greater than or equal to a first preset temperature threshold, and the vehicle has not performed reversible degradation recovery of the fuel cell in the current cycle, the individual cell voltage of the fuel cell can be determined based on the outlet temperature. The individual cell voltage can be used to control the fuel cell to enter a reduction state to recover the reversible degradation of the fuel cell. This avoids the reduction of platinum catalyst to platinum oxide at high potential, which affects the activity of the catalyst and thus affects the performance of the fuel cell or causes platinum loss. It can avoid aggravating the decline in fuel cell performance and avoid affecting the overall performance of the fuel cell.

[0090] Figure 5 This is a flowchart illustrating yet another control method for a fuel cell according to an exemplary embodiment, such as... Figure 5 As shown, step S1033 includes:

[0091] In step S10331, when the SOC of the vehicle's power battery is greater than the preset SOC threshold and the first number of power-on cycles is zero, the DC controller is controlled to not draw current, and then the voltage of the single battery cell is compared with the first preset voltage threshold.

[0092] In step S10332, when the voltage of the single cell is greater than or equal to the first preset voltage threshold, the DC controller controls the voltage of the single cell to be reduced to the second preset voltage threshold so that the fuel cell enters the reduction state. Until the stack temperature and / or the reduction state meet the first set condition, the DC controller reduces the current to adjust the voltage of the single cell so that the fuel cell responds to the target power of the vehicle.

[0093] In step S10333, when the voltage of the single cell is less than the first preset voltage threshold and the voltage of the single cell meets the second set condition, the fuel cell is controlled to shut down due to a fault.

[0094] For example, when the SOC of the vehicle's power battery is greater than a preset SOC threshold and the first number of power-on cycles is zero, the DC controller is controlled to stop drawing current, and the voltage of the single cell is compared with a first preset voltage threshold. When the voltage of the single cell is greater than or equal to the first preset voltage threshold, the DC controller controls the voltage of the single cell to be reduced to a second preset voltage threshold, so that the fuel cell enters a reduction state. Until the stack temperature and / or the reduction state meet the first set condition, the DC controller reduces the current to adjust the voltage of the single cell, so that the fuel cell responds to the target power of the vehicle. When the voltage of the single cell is less than the first preset voltage threshold and the voltage of the single cell meets the second set condition, the fuel cell is controlled to shut down due to a fault.

[0095] For example, when the preset SOC threshold is 30%, the first preset voltage threshold is 0.6V, the second preset voltage threshold is 0.2V, and the first and second setting conditions are time thresholds (1 minute and 3 seconds respectively), when the vehicle's power battery SOC is greater than 30% and the first number of power-on cycles is zero, a single-cell battery voltage is established, the DC controller is controlled not to draw current, and the vehicle's FCU determines the magnitude of the single-cell battery voltage relative to 0.6V. When the single-cell battery voltage is greater than or equal to 0.6V... At voltage v, based on an oxygen starvation control strategy, the DC controller reduces the voltage of the single cell to 0.2V, putting the fuel cell into a reduction state. This reduces the platinum oxide generated at high voltage and rapidly heats the stack, generating a large amount of water. This weakens the adsorption of sulfonic acid groups in the proton exchange membrane by the catalyst, restoring reversible degradation. The reduction continues until the stack exit temperature exceeds 60°C and / or the reduction state lasts for 1 minute. At this point, the DC controller reduces the current to control the voltage of the single cell, allowing the fuel cell to respond to the vehicle's target power, and the first start-up count is incremented. The vehicle's FCU again checks the single cell voltage against 0.6V. If the voltage is less than 0.6V for 3 seconds, the fuel cell is shut down. This process allows the fuel cell to enter a reduction state, preventing the reduction of the platinum catalyst to platinum oxide at high potential, which could affect catalyst activity and lead to platinum loss, thus avoiding further performance degradation and impacting the overall fuel cell performance.

[0096] Figure 6This is a flowchart illustrating yet another control method for a fuel cell according to an exemplary embodiment, such as... Figure 6 As shown, step S1031 includes:

[0097] In step S10311, when the vehicle is in the start-up state, the first number of times the fuel cell is started is determined based on a preset cycle and whether the fuel cell of the vehicle has entered the restoration state in the current cycle.

[0098] In step S10312, when the fuel cell has not entered the restoration state, the first number of times the fuel cell is turned on is set to zero.

[0099] In step S10313, when the fuel cell has entered the restoration state, it is determined whether the current cycle of the vehicle is the same as the cycle of the vehicle in the previous start-up state.

[0100] In step S10314, when the current cycle of the vehicle is different from the cycle of the vehicle in the previous start-up state, the first start-up count of the fuel cell is set to zero.

[0101] In step S10315, when the current cycle of the vehicle is the same as the cycle when the vehicle was in the previous start-up state, the first start-up count is incremented by one to obtain the updated first start-up count of the fuel cell.

[0102] For example, the first number of times the fuel cell is started is determined based on a preset period and whether the vehicle's fuel cell has entered the restoration state in the current period. When the fuel cell has not entered the restoration state, the vehicle must enter the restoration state if the conditions for entering the restoration state are met in any period. When the fuel cell has entered the restoration state, the vehicle obtains the first number of times the vehicle's fuel cell is started. The preset period is set according to the vehicle's battery status.

[0103] Optionally, in another embodiment, the current date is used as a preset period, and step S1031 includes:

[0104] In step S10316, when the vehicle is in the start state, the current date is obtained and compared with the date when the vehicle was last in the start state.

[0105] In step S10317, when the current date increases 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 start-up count of the fuel cell is set to zero.

[0106] 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 start-up count of the fuel cell remains the current start-up count.

[0107] For example, the vehicle first applies low power, the instrument panel starts, and then the vehicle applies high power. When the vehicle is in the starting state, the current date is obtained. This current date is the date and time when the vehicle is connected to the network. The current date is compared with the date when the vehicle was previously in the starting state. If the current date is longer than the date when the vehicle was previously in the starting state, it is determined that there is a jump span in the current date, and the first start count of the fuel cell is set to zero. If the current date is the same as the date when the vehicle was previously in the starting state, it is determined that there is no jump span in the current date, and the first start count of the fuel cell remains at the current start count. For example, if the obtained current date is M, if the date when the vehicle was previously in the starting state is longer than M, the first start count of the fuel cell is recorded as 0. If the date when the vehicle was previously in the starting state is the same as M, the current start count N is obtained, and the first start count is recorded as N. This allows the vehicle's vehicle controller to refresh the fuel cell start count of the vehicle every day.

[0108] Alternatively, in another embodiment, it includes:

[0109] In step S10319, when the first number of startups is zero, the SOC of the vehicle's power battery is obtained. When the SOC of the power battery is less than or equal to a preset SOC threshold, the first number of startups is incremented by one to obtain the first number of startups after the fuel cell is updated. When the SOC of the power battery is greater than the preset SOC threshold, the first number of startups is used as the first number of startups after the fuel cell is updated.

[0110] For example, when the first power-on count is zero and the rocker switch of the fuel cell is in the open state, the SOC of the vehicle's power battery is obtained. When the SOC of the power battery is less than or equal to a preset SOC threshold, the first power-on count is incremented by one to obtain the updated first power-on count. When the SOC of the power battery is greater than the preset SOC threshold, the first power-on count is used as the updated first power-on count. For example: when the preset SOC threshold is 30%, if the current SOC of the vehicle's power battery is less than or equal to 30%, then the vehicle's first power-on count is incremented by 1 and recorded as the updated first power-on count; that is, when the first power-on count is 0, the updated first power-on count is recorded as 1, or when the first power-on count is N, the updated first power-on count is recorded as N+1; when the current SOC of the vehicle's power battery is greater than 30%, the vehicle's first power-on count is recorded as the updated first power-on count, that is, when the first power-on count is 0, the updated first power-on count is recorded as 0, or when the first power-on count is N, the updated first power-on count is recorded as N.

[0111] Optionally, the method further includes:

[0112] When the rocker switch of the fuel cell is in the closed state, the vehicle controller generates a shutdown command, which instructs the fuel cell controller to shut down the fuel cell engine.

[0113] For example, when the rocker switch of the fuel cell is in the closed state, the circuit to which the fuel cell belongs in the vehicle is in the open state, and the vehicle controller generates a shutdown command, which is used to instruct the fuel cell controller to control the engine of the fuel cell to stop.

[0114] The above technical solution can control the vehicle's fuel cell to enter a reduction state, thereby restoring the reversible degradation of the fuel cell, reducing the fuel cell degradation rate, increasing the fuel cell's service life, improving fuel cell power generation efficiency, reducing vehicle hydrogen consumption, enhancing economic efficiency and competitive advantage, and improving overall vehicle safety.

[0115] Figure 7 This is a block diagram illustrating a control device for a fuel cell according to an exemplary embodiment, such as... Figure 7 As shown, the control device 700 for the fuel cell includes: an acquisition module 701, a first control module 702, and a second control module 703;

[0116] The acquisition module 701 is used to acquire the stack outlet temperature of the vehicle fuel cell;

[0117] The first control module 702 is used to determine the cell voltage of the fuel cell based on the stack temperature when the stack temperature is lower than the preset start-up temperature threshold, so as to control the fuel cell to enter the reduction state and restore the reversible degradation of the fuel cell through the cell voltage; and to determine the vehicle target power according to the first number of start-ups and the state of the rocker switch of the fuel cell, and generate a start-up command.

[0118] The second control module 703 is used to acquire the SOC of the vehicle's power battery when the stack temperature is greater than or equal to a preset start-up temperature threshold, and to determine the cell voltage of the fuel cell when the SOC of the power battery is greater than the preset SOC threshold, so as to control the fuel cell to enter the reduction state through the cell voltage and restore the reversible degradation of the fuel cell.

[0119] Optionally, the first control module 702 includes: a first comparison submodule, a first control submodule, and a second control submodule;

[0120] The first comparison submodule is used to compare the discharge temperature with a first preset temperature threshold when the discharge temperature is lower than the preset start-up temperature threshold.

[0121] The first control submodule is used to control the DC controller not to draw current when the stack temperature is greater than or equal to the first preset temperature threshold, and to control the fuel cell to enter the reduction state to restore the reversible degradation of the fuel cell according to the voltage of the single cell, or to control the fuel cell to shut down due to fault.

[0122] The second control submodule is used to heat the fuel cell stack through the vehicle's PTC heater when the stack temperature is lower than the first preset temperature threshold. After heating the stack, it controls the DC controller not to draw current and controls the fuel cell to enter the reduction state to restore the reversible degradation of the fuel cell according to the voltage of the single cell, or controls the fuel cell to shut down due to a fault.

[0123] Optionally, the first control submodule and the second control submodule include: a second comparison submodule, a first restoration submodule, and a shutdown submodule;

[0124] The second comparison submodule is used to compare the voltage of the single battery with the first preset voltage threshold after the DC controller stops drawing current.

[0125] The first reduction submodule is used to control the voltage of the single cell to decrease to a second preset voltage threshold through the DC controller when the voltage of the single cell is greater than or equal to the first preset voltage threshold, so that the fuel cell enters the reduction state. Until the stack temperature and / or the reduction state meet the first set conditions, the DC controller reduces the current to adjust the voltage of the single cell so that the fuel cell responds to the target power of the vehicle.

[0126] The shutdown submodule is used to control the fuel cell to shut down due to a fault when the voltage of the single cell is less than the first preset voltage threshold and the voltage of the single cell meets the second set condition.

[0127] Optionally, the first control submodule includes: a power-on count acquisition submodule, an update submodule, and a second restore submodule;

[0128] The power-on count acquisition submodule is used to acquire the SOC of the vehicle's power battery and the first power-on count of the vehicle when the output temperature is greater than or equal to the preset start-up temperature threshold.

[0129] The update submodule is used to increment the first start-up count by one when the SOC of the power battery is less than or equal to the preset SOC threshold to obtain the updated first start-up count of the fuel cell.

[0130] The second restoration submodule is used to determine the cell voltage of the fuel cell when the SOC of the power battery is greater than the preset SOC threshold and the first number of power-on cycles is zero, so as to control the fuel cell to enter the restoration state through the cell voltage and restore the reversible degradation of the fuel cell.

[0131] Optionally, the second restoration submodule is also used for:

[0132] When the SOC of the vehicle's power battery is greater than the preset SOC threshold and the first number of power-on cycles is zero, the DC controller is controlled to not draw current, and then the voltage of the single battery cell is compared with the first preset voltage threshold.

[0133] When the voltage of the single cell is greater than or equal to the first preset voltage threshold, the DC controller controls the voltage of the single cell to be reduced to the second preset voltage threshold so that the fuel cell enters the reduction state. Until the stack temperature and / or the reduction state meet the first set conditions, the DC controller reduces the current to adjust the voltage of the single cell so that the fuel cell responds to the target power of the vehicle.

[0134] When the voltage of a single cell is less than the first preset voltage threshold and the voltage of a single cell meets the second set condition, the fuel cell is controlled to shut down due to a fault.

[0135] Optionally, this power-on count acquisition submodule is also used for:

[0136] When the vehicle is in the start-up state, the first number of times the fuel cell is started is determined based on a preset cycle and whether the fuel cell of the vehicle has entered the restoration state in the current cycle.

[0137] When the fuel cell has not entered the restoration state, the first number of times the fuel cell is turned on is set to zero.

[0138] When the fuel cell has entered the recovery state, it is determined whether the current cycle of the vehicle is the same as the cycle of the vehicle in the previous start-up state.

[0139] When the current cycle of the vehicle is different from the cycle when the vehicle was last started, the first start-up count of the fuel cell is set to zero.

[0140] When the current cycle of the vehicle is the same as the cycle when the vehicle was last started, the first start-up count is incremented by one to obtain the updated first start-up count of the fuel cell.

[0141] Optionally, the device further includes: a shutdown module;

[0142] The shutdown module is used to generate a shutdown command through the vehicle controller when the rocker switch of the fuel cell is in the closed state. The shutdown command is used to instruct the fuel cell controller to shut down the engine of the fuel cell.

[0143] The above technical solution can control the vehicle's fuel cell to enter a reduction state, thereby restoring the reversible degradation of the fuel cell, reducing the fuel cell degradation rate, increasing the fuel cell's service life, improving fuel cell power generation efficiency, reducing vehicle hydrogen consumption, enhancing economic efficiency and competitive advantage, and improving overall vehicle safety.

[0144] Regarding the apparatus in the above embodiments, the specific manner in which each module performs its operation has been described in detail in the embodiments related to the method, and will not be elaborated upon here.

[0145] Figure 8 This is a block diagram illustrating an electronic device 800 according to an exemplary embodiment. For example... Figure 8 As shown, the electronic device 800 may include a processor 801 and 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.

[0146] The processor 801 controls the overall operation of the electronic device 800 to complete all or part of the steps in the aforementioned fuel cell control method. The memory 802 stores various types of data to support the operation of the electronic device 800. This data may include, for example, instructions for any application or method operating on the electronic device 800, and 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 (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The multimedia component 803 may include a screen and audio components. The screen may be, for example, a touchscreen, 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 signals may be further stored in memory 802 or transmitted via communication component 805. The audio component also includes at least one speaker for outputting audio signals. I / O interface 804 provides an interface between processor 801 and other interface modules, such as a keyboard, mouse, buttons, etc. These buttons may be virtual or physical buttons. 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 technologies, or combinations thereof, is not limited here. Therefore, the corresponding communication component 805 may include: a Wi-Fi module, a Bluetooth module, an NFC module, etc.

[0147] In an exemplary embodiment, the electronic device 800 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to execute the above-described fuel cell control method.

[0148] In another exemplary embodiment, a computer-readable storage medium including program instructions is also provided, which, when executed by a processor, implement the steps of the fuel cell control method described above. For example, the computer-readable storage medium may be the memory 802 including program instructions described above, which may be executed by the processor 801 of the electronic device 800 to complete the fuel cell control method described above.

[0149] Figure 9 This is a block diagram illustrating an electronic device 900 according to an exemplary embodiment. For example, the electronic device 900 may be provided as a server. (Refer to...) Figure 9 The electronic device 900 includes a processor 922, which may be one or more, and a memory 932 for storing computer programs executable by the processor 922. The computer programs stored in the memory 932 may include one or more modules, each corresponding to a set of instructions. Furthermore, the processor 922 may be configured to execute the computer program to perform the aforementioned fuel cell control method.

[0150] Additionally, the electronic device 900 may also include a power supply component 926 and a communication component 950. The power supply component 926 can be configured to perform power management of the electronic device 900, and the communication component 950 can be configured to enable communication of the electronic device 900, such as wired or wireless communication. Furthermore, the electronic device 900 may also include an input / output (I / O) interface 958. The electronic device 900 can operate on an operating system stored in a memory 932.

[0151] In another exemplary embodiment, a computer-readable storage medium including program instructions is also provided, which, when executed by a processor, implement the steps of the fuel cell control method described above. For example, the non-transitory computer-readable storage medium may be the memory 932 including program instructions described above, which may be executed by the processor 922 of the electronic device 900 to complete the fuel cell control method described above.

[0152] In another exemplary embodiment, a computer program product is also provided, which includes a computer program executable by a programmable device, the computer program having a code portion for performing the above-described control method for a fuel cell when executed by the programmable device.

[0153] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0154] 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, this disclosure will not describe the various possible combinations separately.

[0155] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A control method for a fuel cell, characterized in that, include: Obtain the stack outlet temperature of the vehicle's fuel cell; When the stack temperature is lower than the preset start-up temperature threshold, the cell voltage of the fuel cell is determined based on the stack temperature, so as to control the fuel cell to enter the reduction state and restore the reversible degradation of the fuel cell by controlling the cell voltage. When the discharge temperature is greater than or equal to a preset start-up temperature threshold, the SOC of the vehicle's power battery and the first number of times the vehicle is started are obtained. When the SOC of the power battery is less than or equal to a preset SOC threshold, the first number of startups is incremented by one to obtain the updated first number of startups of the fuel cell; When the SOC of the power battery is greater than the preset SOC threshold and the first number of power-on cycles is zero, the voltage of a single cell of the fuel cell is determined so as to control the fuel cell to enter the reduction state through the voltage of the single cell and restore the reversible degradation of the fuel cell. The step of obtaining the first number of times the vehicle's fuel cell is powered on includes: When the vehicle is in the start-up state, the first number of times the fuel cell is started is determined based on a preset period and whether the fuel cell of the vehicle has entered the restoration state in the current period. When the fuel cell enters the recovery state, it is determined whether the current cycle of the vehicle is the same as the cycle of the vehicle in the previous start-up state; When the current cycle of the vehicle is different from the cycle of the vehicle's previous start-up state, the first start-up count of the fuel cell is set to zero. When the current cycle of the vehicle is the same as the cycle when the vehicle was previously started, the first start-up count is incremented by one to obtain the updated first start-up count of the fuel cell.

2. The method according to claim 1, characterized in that, When the stack exit temperature is lower than a preset start-up temperature threshold, the individual 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 and restore the reversible degradation of the fuel cell by means of the individual cell voltage, including: When the discharge temperature is lower than the preset start-up temperature threshold, the discharge temperature is compared with the first preset temperature threshold. When the stack temperature is greater than or equal to the first preset temperature threshold, the DC controller is controlled not to draw current, and the fuel cell is controlled to enter the reduction state to restore the reversible degradation of the fuel cell according to the voltage of the single 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. After heating the stack, the DC controller is controlled not to draw current, and the fuel cell is controlled to enter the reduction state to restore the reversible degradation of the fuel cell according to the voltage of the individual cells, or the fuel cell is controlled to shut down due to a fault.

3. The method according to claim 2, characterized in that, The control of the DC controller to prevent current traction and to control the fuel cell to enter a reduction state to restore the reversible degradation of the fuel cell based on the voltage of the individual cells, or to control the fuel cell to shut down due to a fault, includes: After controlling the DC controller to prevent it from drawing load current, the voltage of the single battery cell is compared with a first preset voltage threshold. When the voltage of the single cell is greater than or equal to the first preset voltage threshold, the DC controller controls the voltage of the single cell to be reduced to the second preset voltage threshold so that the fuel cell enters the reduction state. Until the stack temperature and / or the reduction state meet the first set condition, the DC controller reduces the current to adjust the voltage of the single cell so that the fuel cell responds to the target power of the vehicle. When the voltage of a single cell is less than the first preset voltage threshold and the voltage of a single cell meets the second set condition, the fuel cell is controlled to shut down due to a fault.

4. The method according to claim 1, characterized in that, The step of determining the individual cell voltage of the fuel cell when the SOC of the power battery is greater than the preset SOC threshold and the first number of power-on cycles is zero, so as to control the fuel cell to enter the reduction state through the individual cell voltage and restore the reversible degradation of the fuel cell, includes: When the SOC of the vehicle's power battery is greater than the preset SOC threshold and the first number of power-on cycles is zero, the DC controller is controlled not to draw current, and the voltage of the single battery cell is compared with the first preset voltage threshold. When the voltage of the single cell is greater than or equal to the first preset voltage threshold, the DC controller controls the voltage of the single cell to be reduced to the second preset voltage threshold so that the fuel cell enters the reduction state. Until the stack temperature and / or the reduction state meet the first set condition, the DC controller reduces the current to adjust the voltage of the single cell so that the fuel cell responds to the target power of the vehicle. When the voltage of a single cell is less than the first preset voltage threshold and the voltage of a single cell meets the second set condition, the fuel cell is controlled to shut down due to a fault.

5. The method according to claim 1, characterized in that, The method further includes: When the rocker switch of the fuel cell is in the closed state, the vehicle controller generates a shutdown command, which is used to instruct the fuel cell controller to shut down the engine of the fuel cell.

6. A control device for a fuel cell, characterized in that, include: The acquisition module is used to acquire the stack outlet temperature of the vehicle's fuel cell; The first control module is used to determine the cell voltage of the fuel cell based on the stack temperature when the stack temperature is less than the preset start-up temperature threshold, so as to control the fuel cell to enter the reduction state through the cell voltage and restore the reversible degradation of the fuel cell. The second control module is used to acquire the SOC of the vehicle's power battery and the first number of times the vehicle is started when the stack temperature is greater than or equal to a preset start-up temperature threshold. When the SOC of the power battery is less than or equal to a preset SOC threshold, the first number of startups is incremented by one to obtain the updated first number of startups of the fuel cell; When the SOC of the power battery is greater than the preset SOC threshold and the first number of power-on cycles is zero, the voltage of a single cell of the fuel cell is determined so as to control the fuel cell to enter the reduction state through the voltage of the single cell and restore the reversible degradation of the fuel cell. The step of obtaining the first number of times the vehicle's fuel cell is powered on includes: When the vehicle is in the start-up state, the first number of times the fuel cell is started is determined based on a preset period and whether the fuel cell of the vehicle has entered the restoration state in the current period. When the fuel cell enters the recovery state, it is determined whether the current cycle of the vehicle is the same as the cycle of the vehicle in the previous start-up state; When the current cycle of the vehicle is different from the cycle of the vehicle's previous start-up state, the first start-up count of the fuel cell is set to zero. When the current cycle of the vehicle is the same as the cycle when the vehicle was previously started, the first start-up count is incremented by one to obtain the updated first start-up count of the fuel cell.

7. An electronic device, characterized in that, include: A memory on which computer programs are stored; A processor for executing the computer program in the memory to implement the steps of the method according to any one of claims 1-5.

8. A vehicle, characterized in that, include: The electronic device according to claim 7.

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