A method and device for optimizing vehicle fuel cell life attenuation

Abstract

The present invention relates to a method and device for optimizing the lifespan degradation of a vehicle fuel cell, belonging to the field of fuel cell technology. The method includes: when the vehicle is in park, controlling the output voltage of a single cell to be less than a preset threshold value of 0.65V, and reducing platinum oxide in the catalyst of the single cell to elemental platinum. This method slows the performance degradation of the single cell, optimizes the lifespan degradation of the fuel cell, and reduces maintenance costs for users.

Description

Technical Field

[0001] The present invention relates to the field of fuel cell technology, and in particular to a method and device for optimizing the life attenuation of a vehicle fuel cell. Background Art

[0002] Fuel cell system performance degradation is the result of the degradation of various materials within a chemical system. The fuel cell stack is the weakest link in fuel cell system durability, and degradation of the catalyst in the membrane electrode is the primary cause of stack performance degradation. Catalyst components primarily consist of a carbon support and the precious metal Pt, and Pt degradation is the primary cause of performance degradation.

[0003] Repeated fluctuations in the stack voltage can cause Pt to dissolve and redeposit, resulting in Pt particle size growth. Pt dissolves at high potentials, forming ions. When the potential drops, the ionic Pt deposits. Under these repeated cycles of high and low potentials, small Pt particles gradually dissolve, while larger particles grow. This gradually reduces the electrochemically active surface area (ECSA), leading to a decrease in stack performance and even degradation.

[0004] Under the current circumstances, the power of a vehicle's fuel cell system is adjusted only according to the state of charge (SOC) of the power battery. The battery voltage fluctuates repeatedly between high and low potentials, causing small Pt particles in the battery catalyst to gradually dissolve, large particles to gradually grow, the ECSA area to gradually decrease, and the fuel cell performance to decay rapidly. Summary of the Invention

[0005] In view of this, it is necessary to provide a vehicle fuel cell life attenuation optimization method and device to solve the problem that the power of the current vehicle fuel cell system is only adjusted according to the SOC of the power battery, resulting in the gradual dissolution of small Pt particles in the battery catalyst, the gradual growth of large particles, the gradual reduction of ECSA area, and the rapid attenuation of fuel cell system performance, which in turn leads to the rapid attenuation of fuel cell life.

[0006] In order to solve the above problems, the present invention provides a method for optimizing the life attenuation of a vehicle fuel cell, comprising:

[0007] When it is determined that the vehicle gear is in the parking gear, the output voltage of the single cell is controlled to be less than a preset threshold value, and the platinum oxide in the catalyst of the single cell is reduced to elemental platinum. The preset threshold value is 0.65V.

[0008] In a possible implementation, controlling the output voltage of a single battery cell includes:

[0009] The output voltage of the single battery is controlled to be greater than or equal to 0.15V and less than or equal to 0.25V.

[0010] In a possible implementation, the method further includes:

[0011] The gas valve based on the anode of the single cell controls the air flow rate of the anode of the single cell to be less than or equal to the first flow rate threshold, the gas valve based on the cathode of the single cell controls the hydrogen flow rate of the cathode of the single cell to be less than or equal to the second flow rate threshold, and controls the hydrogen pressure of the cathode of the single cell.

[0012] In one possible implementation, controlling the hydrogen pressure at the cathode of the single cell includes:

[0013] The gas valve on the cathode of the single cell controls the hydrogen pressure at the cathode of the single cell to be greater than or equal to 20 kPa and less than or equal to 35 kPa.

[0014] In a possible implementation, the method further includes:

[0015] At the start of each preset period, the first flow threshold is adjusted based on a first preset step length, and the second flow threshold is adjusted based on a second preset step length.

[0016] In a possible implementation, the method further includes:

[0017] When the duration of the catalyst reduction process of the single cell is longer than a preset duration, the reduction of platinum oxide in the catalyst of the single cell into elemental platinum is stopped.

[0018] In a possible implementation, the method further includes:

[0019] When it is determined that the gear position of the vehicle is not in the parking gear, the output power of the fuel cell system is determined based on the state of charge of the fuel cell system.

[0020] The present invention also provides a vehicle fuel cell life attenuation optimization device, comprising:

[0021] The control module is used to control the output voltage of the single cell to be less than a preset threshold value when it is determined that the vehicle gear is in the parking gear, and reduce the platinum oxide in the catalyst of the single cell to elemental platinum. The preset threshold value is 0.65V.

[0022] The present invention also provides an electronic device comprising a memory and a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, the vehicle fuel cell life attenuation optimization method as described above is implemented.

[0023] The present invention also provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the vehicle fuel cell life attenuation optimization method as described above is implemented.

[0024] The beneficial effects of the present invention are as follows: the vehicle fuel cell life attenuation optimization method and device provided by the present invention first determine the vehicle gear position. When the vehicle is in P gear, the output voltage of the single cell is controlled to be less than a preset threshold value, so that the PtO in the catalyst of the single cell is reduced to Pt. When the vehicle is in P gear, the output power of the fuel cell system can be prevented from being too large to affect the catalyst reduction. By controlling the cell voltage, the reaction conditions of the catalyst can be controlled, and the reduction of the ECSA area caused by repeated changes in high and low potentials can be avoided, thereby delaying the performance attenuation rate of the single cell, realizing the life attenuation optimization of the fuel cell, and reducing the user's maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic flow chart of an embodiment of a method for optimizing the lifespan attenuation of a vehicle fuel cell provided by the present invention;

[0026] Figure 2 A schematic flow chart of another embodiment of the vehicle fuel cell life attenuation optimization method provided by the present invention;

[0027] Figure 3 A schematic structural diagram of an embodiment of a vehicle fuel cell life attenuation optimization device provided by the present invention;

[0028] Figure 4 This is a structural diagram of an embodiment of an electronic device provided by the present invention. DETAILED DESCRIPTION

[0029] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, and are not used to limit the scope of the present invention.

[0030] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. Furthermore, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0031] In the description of the present invention, reference to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute a separate or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the described embodiment may be combined with other embodiments.

[0032] Fuel cell system performance degradation is the result of the degradation of various materials within a chemical system. The fuel cell stack is the weakest link in fuel cell system durability, and degradation of the catalyst in the membrane electrode is the primary cause of stack performance degradation. Catalyst components primarily consist of a carbon support and the precious metal Pt, and Pt degradation is the primary cause of performance degradation.

[0033] Repeated fluctuations in the stack voltage can lead to the dissolution and redeposition of Pt, causing the Pt particles to grow in size. Pt dissolves at high potentials, forming ions. When the potential drops, the ionic Pt deposits. Under these repeated fluctuations in potential, small Pt particles gradually dissolve, while larger particles grow. This decreases the ECSA area, leading to a decrease in stack performance and even degradation.

[0034] Under the current circumstances, the power of the vehicle fuel cell system is only adjusted according to the SOC of the power battery, and the battery voltage fluctuates repeatedly between high and low potentials, causing the small Pt particles in the battery catalyst to gradually dissolve, the large particles to gradually grow, the ECSA area to gradually decrease, and the fuel cell performance to decay rapidly.

[0035] In order to optimize the life of a fuel cell system, the present invention provides a vehicle fuel cell life attenuation optimization method.

[0036] The specific embodiments are described in detail below:

[0037] A specific embodiment of the present invention discloses a vehicle fuel cell life attenuation optimization method, combined with Figure 1 Come and see, Figure 1 This is a flow chart of an embodiment of a vehicle fuel cell life degradation optimization method provided by the present invention, including step S101, wherein:

[0038] In step S101 , when it is determined that the vehicle is in the parking gear, the output voltage of the single cell is controlled to be less than a preset threshold value, and the platinum oxide in the catalyst of the single cell is reduced to elemental platinum. The preset threshold value is 0.65V.

[0039] During implementation, the vehicle gear position can be judged first. When it is determined that the vehicle gear is in the parking gear (i.e., P gear), the platinum oxide (PtO) in the catalyst of the single cell can be reduced to elemental platinum (Pt) by controlling the output voltage of the single cell to be less than 0.65V.

[0040] Currently, the output voltage of a single cell during normal operation is between 0.65V and 0.85V. Controlling the output voltage of a single cell below 0.65V allows the reduction rate of Pt in the cell's catalyst to exceed its oxidation rate. When the vehicle is in P gear, no battery power is required, and the output voltage of the single cell can be controlled at a relatively low level without affecting vehicle operation.

[0041] Reducing PtO in the catalyst of a single cell to Pt can reduce the amount of Pt in the ionic state, thereby slowing the precipitation of Pt in the ionic state. Delaying the precipitation of Pt in the ionic state can further reduce the rate of reduction of the ECSA area, thereby slowing the performance degradation of the single cell and optimizing the lifespan of the fuel cell.

[0042] When the vehicle is in other gears, since the fuel cell needs to provide driving power for the vehicle, the output voltage of the single cell needs to be kept within the normal range. At this time, the power of the vehicle fuel cell system can be adjusted according to the power battery SOC by referring to the solutions in the prior art.

[0043] The vehicle fuel cell life attenuation optimization method provided by the present invention can be applied to the fuel cell system life optimization scenario of commercial vehicles, and can also be applied to the fuel cell system life optimization scenario of other types of vehicles. The present invention does not make specific limitations on this.

[0044] Compared with the prior art, the vehicle fuel cell life attenuation optimization method provided in this embodiment first determines the vehicle gear position. When the vehicle is in P gear, the output voltage of the single cell is controlled to be less than a preset threshold value, so that the PtO in the catalyst of the single cell is reduced to Pt. When the vehicle is in P gear, the output power of the fuel cell system can be prevented from being too large and affecting the catalyst reduction. By controlling the cell voltage, the reaction conditions of the catalyst can be controlled, and the reduction of the ECSA area caused by repeated changes in high and low potentials can be avoided, thereby delaying the performance attenuation rate of the single cell, realizing the life attenuation optimization of the fuel cell, and reducing the user's maintenance costs.

[0045] Exemplarily, controlling the output voltage of a single battery cell includes:

[0046] The output voltage of the single battery is controlled to be greater than or equal to 0.15V and less than or equal to 0.25V.

[0047] Specifically, when controlling the output voltage of a single cell, the output voltage of the single cell can be maintained at 0.15 V to 0.25 V. Within this voltage range, the PtO reduction rate can be maintained while minimizing the re-oxidation of the reduced Pt, thereby ensuring the effect of optimizing the fuel cell life attenuation.

[0048] Exemplarily, the method further includes:

[0049] The gas valve based on the anode of the single cell controls the air flow rate of the anode of the single cell to be less than or equal to the first flow rate threshold, the gas valve based on the cathode of the single cell controls the hydrogen flow rate of the cathode of the single cell to be less than or equal to the second flow rate threshold, and controls the hydrogen pressure of the cathode of the single cell.

[0050] Specifically, while controlling the output voltage of the single cell, the air flow at the anode of the single cell can be controlled to be less than or equal to a first flow threshold through the gas valve at the anode of the single cell, and the hydrogen flow at the cathode of the single cell can be controlled to be less than or equal to a second flow threshold through the gas valve at the cathode of the single cell, and the hydrogen pressure at the cathode of the single cell can be controlled, thereby controlling the oxidation rate of the catalyst of the single cell to avoid the catalyst being rapidly oxidized while being reduced. The air flow and hydrogen flow can be monitored by the airflow sensor provided on the single cell, and the hydrogen pressure can be monitored by the pressure sensor provided on the single cell.

[0051] By controlling the air flow to the cell anode and the hydrogen flow to the cell cathode by controlling the gas valve at the cell anode, the reduced Pt can be further prevented from being oxidized again, improving the PtO reduction effect and thus optimizing the fuel cell lifespan degradation. Controlling the hydrogen pressure at the cell cathode also achieves the same effect and will not be detailed here.

[0052] Exemplarily, controlling the hydrogen pressure at the cathode of the single cell includes:

[0053] The gas valve on the cathode of the single cell controls the hydrogen pressure at the cathode of the single cell to be greater than or equal to 20 kPa and less than or equal to 35 kPa.

[0054] Specifically, when controlling the hydrogen pressure at the cathode of a single cell, the hydrogen pressure can be controlled within a range of greater than or equal to 20 kPa and less than or equal to 35 kPa through the gas valve at the cathode of the single cell. Within this pressure range, the re-oxidation of the reduced Pt can be minimized, improving the effect of PtO reduction and thus ensuring the optimization of fuel cell life attenuation.

[0055] Exemplarily, the method further includes:

[0056] At the start of each preset period, the first flow threshold is adjusted based on a first preset step length, and the second flow threshold is adjusted based on a second preset step length.

[0057] Specifically, since the catalyst of the single cell will produce gas and water during reduction, a preset cycle can be set (for example, every 10 seconds). Then, at the starting moment of each preset cycle, the first flow threshold is adjusted based on the first preset step length, and the second flow threshold is adjusted based on the second preset step length to strengthen the flow of gas, thereby speeding up the drainage and exhaust speed, and avoiding the gas and water generated during reduction affecting the reduction speed, thereby affecting the life attenuation optimization effect.

[0058] Exemplarily, the method further includes:

[0059] When the duration of the catalyst reduction process of the single cell is longer than a preset duration, the reduction of platinum oxide in the catalyst of the single cell into elemental platinum is stopped.

[0060] Specifically, since prolonged reduction may affect the battery's ability to provide power, when reducing the catalyst of a single cell, if the duration of the catalyst reduction process of the single cell is greater than a preset time (for example, the preset time can be set to 4 minutes), the reduction of platinum oxide in the catalyst of the single cell to elemental platinum can be stopped, thereby ensuring the user experience.

[0061] Exemplarily, the method further includes:

[0062] When it is determined that the gear position of the vehicle is not in the parking gear, the output power of the fuel cell system is determined based on the state of charge of the fuel cell system.

[0063] Specifically, when determining the vehicle gear, if the vehicle gear is not in the parking gear or the vehicle is switched from the parking gear to another gear, the output power of the fuel cell system can be determined according to the SOC of the fuel cell system, and power output can be performed according to the existing scheme.

[0064] The following is a specific application scenario to better illustrate the technical solution of the present invention:

[0065] Fuel cell system performance degradation is the result of the degradation of various materials within a chemical system. The fuel cell stack is the weakest link in fuel cell system durability, and degradation of the catalyst in the membrane electrode is the primary cause of stack performance degradation. Catalyst components primarily consist of a carbon support and the precious metal Pt, and Pt degradation is the primary cause of performance degradation.

[0066] Repeated fluctuations in the stack voltage can lead to the dissolution and redeposition of Pt, causing the Pt particles to grow in size. Pt dissolves at high potentials, forming ions. When the potential drops, the ionic Pt deposits. Under these repeated fluctuations in potential, small Pt particles gradually dissolve, while larger particles grow. This decreases the ECSA area, leading to a decrease in stack performance and even degradation.

[0067] Under normal circumstances, the voltage of a single cell is controlled at 0.85-0.65V. Under such conditions, the Pt surface is easily oxidized to form PtO. In order to reduce the further generation of PtO Dissolution and redeposition occur. The present invention reduces the battery voltage by a "flushing" operation in the P gear of the vehicle to reduce PtO to Pt.

[0068] Combine Figure 2 Come and see, Figure 2 This is a flow chart of another embodiment of the vehicle fuel cell life attenuation optimization method provided by the present invention, and the specific steps are as follows:

[0069] 1. When the vehicle is detected to be in P gear, the "flushing" strategy is activated to prepare to reduce the PtO in the catalyst of the single cell to Pt.

[0070] 2. The battery anode adopts oxygen starvation control to limit the air flow; the battery cathode limits the hydrogen flow and pressure, and controls the hydrogen pressure between [20kPa, 35kPa]. By controlling the external conditions, the Pt obtained by reduction is prevented from being oxidized again, which affects the life attenuation optimization effect.

[0071] 3. Control DCDC to maintain the voltage of the battery stack at around 0.2V. By controlling the output voltage of the single cell, the Pt obtained by reduction is prevented from being oxidized again, which affects the life attenuation optimization effect.

[0072] 4. Periodically increase the hydrogen circulation pump and air flow every 10 seconds to strengthen drainage and exhaust to prevent the water and gas generated by the reaction from affecting the reduction rate.

[0073] 5. When it is detected that the P gear is exited or the "flushing" time is longer than 4 minutes, the "flushing" strategy process is exited and the output power of the fuel cell system is controlled according to the battery SOC.

[0074] The present invention utilizes the vehicle's P gear operating condition and a "flushing" control strategy to promote PtO reduction while the vehicle is idling in P gear. This reduces the amount of Pt in an ionic state and, in turn, slows the sedimentation of the ionic Pt. Delaying the sedimentation of the ionic Pt further reduces the rate of ECSA area reduction, thereby slowing the performance degradation of the individual cells and optimizing the fuel cell's lifespan. Furthermore, during the PtO reduction process, a series of measures are implemented to prevent the reduced Pt from being re-oxidized, ensuring the optimized fuel cell's lifespan.

[0075] The embodiment of the present invention also provides a vehicle fuel cell life attenuation optimization device, combined with Figure 3 Come and see, Figure 3 This is a schematic structural diagram of an embodiment of a vehicle fuel cell life degradation optimization device provided by the present invention. The vehicle fuel cell life degradation optimization device 300 includes:

[0076] The control module 301 is used to control the output voltage of the single cell to be less than a preset threshold value when determining that the vehicle gear is in the parking gear, and reduce the platinum oxide in the catalyst of the single cell to elemental platinum. The preset threshold value is 0.65V.

[0077] The specific implementation of each module of the vehicle fuel cell life attenuation optimization device can be found in the description of the above-mentioned vehicle fuel cell life attenuation optimization method, and has similar beneficial effects, which will not be repeated here.

[0078] It should be noted that the vehicle fuel cell life attenuation optimization device can be installed on an existing fuel cell system control device or as an independent device, and the present invention does not impose any specific restrictions on this.

[0079] The embodiment of the present invention further provides an electronic device, Figure 4 Come and see, Figure 4 This is a structural diagram of an embodiment of an electronic device provided by the present invention. The electronic device 400 includes a processor 401, a memory 402, and a computer program stored in the memory 402 and executable on the processor 401. When the processor 401 executes the program, the vehicle fuel cell life attenuation optimization method described above is implemented.

[0080] As a preferred embodiment, the electronic device 400 further includes a display 403 for displaying the vehicle fuel cell life attenuation optimization method executed by the processor 401 .

[0081] For example, the computer program can be divided into one or more modules / units, one or more of which are stored in the memory 402 and executed by the processor 401 to implement the present invention. One or more modules / units can be a series of computer program instruction segments capable of performing specific functions, and the instruction segments are used to describe the execution process of the computer program in the electronic device 400. For example, the computer program can be divided into the control module 301 in the above embodiment. The specific functions of each module are as described above and are not repeated here.

[0082] The electronic device 400 may be a desktop computer, notebook, PDA, or smart phone with an adjustable camera module.

[0083] Processor 401 may be an integrated circuit chip with signal processing capabilities. The processor 401 may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), or a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the various methods, steps, and logic block diagrams disclosed in the embodiments of the present invention. The general-purpose processor may be a microprocessor or any conventional processor.

[0084] The memory 402 may be, but is not limited to, a random access memory (RAM), a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), etc. The memory 402 is used to store programs. The processor 401 executes the programs after receiving an execution instruction. The process definition method disclosed in any of the aforementioned embodiments of the present invention may be applied to the processor 401 or implemented by the processor 401.

[0085] The display 403 may be an LCD display or an LED display, for example, a display on a vehicle-mounted device.

[0086] It is understandable that Figure 4 The structure shown is only a schematic diagram of the structure of the electronic device 400. The electronic device 400 may also include Figure 4 More or fewer components as shown. Figure 4 Each component shown in the figure can be implemented by hardware, software or a combination thereof.

[0087] The electronic device provided according to the above-mentioned embodiment of the present invention can be implemented with reference to the specific description of the vehicle fuel cell life attenuation optimization method according to the present invention, and has similar beneficial effects as the vehicle fuel cell life attenuation optimization method described above, which will not be repeated here.

[0088] An embodiment of the present invention further provides a computer-readable storage medium having a computer program stored thereon. When the program is executed by a processor, the vehicle fuel cell life attenuation optimization method described above is implemented.

[0089] Generally speaking, computer instructions for implementing the method of the present invention may be carried by any combination of one or more computer-readable storage media. Non-transitory computer-readable storage media may include any computer-readable media except for signals that are temporarily propagating.

[0090] A computer-readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples (a non-exhaustive list) of computer-readable storage media include: an electrical connection having one or more conductors, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In this document, a computer-readable storage medium may be any tangible medium that can contain or store a program for use by or in connection with an instruction execution system, apparatus, or device.

[0091] Computer program code for performing the operations of the present invention can be written in one or more programming languages, or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, as well as conventional procedural programming languages ​​such as C or similar programming languages. In particular, Python, which is suitable for neural network computing, and platform frameworks such as TensorFlow and PyTorch can be used. The program code can be executed entirely on the user's computer, partially on the user's computer, as a stand-alone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer can be connected to the user's computer via any type of network, including a local area network (LAN) or a wide area network (WAN), or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0092] Those skilled in the art will appreciate that all or part of the process steps of the above-described embodiments can be implemented by instructing related hardware through a computer program, and the program can be stored in a computer-readable storage medium, such as a magnetic disk, an optical disk, a read-only memory, or a random access memory.

[0093] The present invention discloses a method and device for optimizing the life attenuation of a vehicle fuel cell. First, the vehicle gear position is determined. When the vehicle is in gear P, the output voltage of the single cell is controlled to be less than a preset threshold, so that the PtO in the catalyst of the single cell is reduced to Pt. When the vehicle is in gear P, the output power of the fuel cell system can be prevented from being too high and affecting the reduction of the catalyst. By controlling the cell voltage, the reaction conditions of the catalyst can be controlled, and the reduction in the ECSA area caused by repeated changes in high and low potentials can be avoided, thereby delaying the performance attenuation rate of the single cell, achieving optimization of the life attenuation of the fuel cell, and reducing the maintenance cost for users.

[0094] The present invention can make the reduction rate of Pt in the catalyst of the single cell greater than the oxidation rate by controlling the output voltage of the single cell to be less than a preset threshold. When the vehicle is in P gear, there is no need for the battery to provide power. At this time, the output voltage of the single cell can be controlled at a relatively low level without affecting the operation of the vehicle. Reducing the PtO in the catalyst of the single cell to Pt can reduce the amount of Pt in the ionic state, thereby delaying the sedimentation process of Pt in the ionic state. Delaying the sedimentation process of Pt in the ionic state can further reduce the rate of reduction of the ECSA area, thereby delaying the performance decay rate of the single cell and optimizing the life decay of the fuel cell. When the vehicle is in other gears, since the fuel cell needs to provide driving power for the vehicle, it is necessary to keep the output voltage of the single cell within a normal range. At this time, the solution in the prior art can be referred to and the power of the vehicle fuel cell system can be adjusted according to the SOC of the power battery.

[0095] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed by the present invention should be covered by the scope of protection of the present invention.

Claims

1. A method for optimizing the life attenuation of a vehicle fuel cell, characterized in that: include: When the vehicle is in the parking gear, the output voltage of the single cell is controlled to be less than a preset threshold value, and the platinum oxide in the catalyst of the single cell is reduced to elemental platinum. The preset threshold value is 0.65V. The method further comprises: The air valve based on the anode of the single cell controls the air flow rate of the anode of the single cell to be less than or equal to a first flow rate threshold, the air valve based on the cathode of the single cell controls the hydrogen flow rate of the cathode of the single cell to be less than or equal to a second flow rate threshold, and controls the hydrogen pressure of the cathode of the single cell; The method further comprises: At the start of each preset period, the first flow threshold is adjusted based on a first preset step length, and the second flow threshold is adjusted based on a second preset step length.

2. The vehicle fuel cell life attenuation optimization method according to claim 1, characterized in that: The controlling the output voltage of the single cell includes: The output voltage of the single battery is controlled to be greater than or equal to 0.15V and less than or equal to 0.25V.

3. The vehicle fuel cell life attenuation optimization method according to claim 1, characterized in that: The controlling of the hydrogen pressure at the cathode of the single cell comprises: The gas valve on the cathode of the single cell controls the hydrogen pressure at the cathode of the single cell to be greater than or equal to 20 kPa and less than or equal to 35 kPa.

4. The vehicle fuel cell life attenuation optimization method according to claim 1, characterized in that: The method further comprises: When the duration of the catalyst reduction process of the single cell is longer than a preset duration, the reduction of platinum oxide in the catalyst of the single cell into elemental platinum is stopped.

5. The vehicle fuel cell life attenuation optimization method according to any one of claims 1 to 4, characterized in that: The method further comprises: When it is determined that the gear position of the vehicle is not in the parking gear, the output power of the fuel cell system is determined based on the state of charge of the fuel cell system.

6. A vehicle fuel cell life attenuation optimization device, characterized in that: include: a control module configured to control the output voltage of the single cell to be less than a preset threshold value when determining that the vehicle is in the park gear, thereby reducing platinum oxide in the catalyst of the single cell to elemental platinum, wherein the preset threshold value is 0.65V; The air valve based on the anode of the single cell controls the air flow rate of the anode of the single cell to be less than or equal to a first flow rate threshold, the air valve based on the cathode of the single cell controls the hydrogen flow rate of the cathode of the single cell to be less than or equal to a second flow rate threshold, and controls the hydrogen pressure of the cathode of the single cell; At the start of each preset period, the first flow threshold is adjusted based on a first preset step length, and the second flow threshold is adjusted based on a second preset step length.

7. An electronic device, characterized in that: The invention comprises a memory and a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, the vehicle fuel cell life attenuation optimization method according to any one of claims 1 to 5 is implemented.

8. A computer-readable storage medium, characterized in that A computer program is stored thereon, and when the computer program is executed by a processor, the vehicle fuel cell life attenuation optimization method according to any one of claims 1 to 5 is implemented.

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