CN117141319A

CN117141319A - Performance recovery method and performance recovery device for fuel cell, and vehicle

Info

Publication number: CN117141319A
Application number: CN202311269631.9A
Authority: CN
Inventors: 郗富强; 张同华; 刘晓辉; 李玉赛; 景世强
Original assignee: Weichai Power Co Ltd
Current assignee: Weichai Power Co Ltd
Priority date: 2023-09-27
Filing date: 2023-09-27
Publication date: 2023-12-01

Abstract

The application provides a performance recovery method, a performance recovery device and a vehicle of a fuel cell, wherein the method comprises the following steps: acquiring a target mark, and acquiring a target vehicle speed under the condition that the target mark is that the engine is in an operating state and the recovery accumulation time is longer than a first threshold value and/or the battery performance loss is greater than a second threshold value; acquiring a target reserve and a target electric quantity under the condition that the target vehicle speed is 0, and activating a recovery function under the condition that the target reserve is larger than a third threshold and the target electric quantity is smaller than a fourth threshold and larger than a fifth threshold; and acquiring the target electric quantity and the target reserve capacity under the condition that the target vehicle speed is not 0, and activating a recovery function under the condition that the target electric quantity is larger than a sixth threshold value and the target reserve capacity is larger than a third threshold value. The application solves the problem of fuel cell performance attenuation caused by oxidation of the fuel cell catalyst under the working conditions of idling, low speed and the like of the vehicle.

Description

Performance recovery method and performance recovery device for fuel cell, and vehicle

Technical Field

The present application relates to the field of battery control technology, and in particular, to a performance recovery method, a performance recovery apparatus, a computer-readable storage medium, and a vehicle for a fuel cell.

Background

In the long-term running process of the whole fuel cell, the high-potential working conditions such as idling, low speed and the like occupy a large proportion, the high potential can lead to platinum oxidation, the active area of a catalyst layer is reduced, the oxidation-reduction reaction rate is reduced, and therefore the performance of the fuel cell engine is reduced. Therefore, periodic recovery of fuel cell performance is critical to the operation of the whole vehicle. The cathode is reduced in air supply under the working state of the fuel cell by a cathode undergas method, the cathode voltage is controlled to be in a low potential state, the oxidation layer of the cathode is promoted to generate reduction reaction, the oxidant on the surface of the cathode catalyst is reduced, and the activity of the catalyst is recovered so as to recover the performance of the fuel cell.

Disclosure of Invention

The application aims to provide a performance recovery method, a performance recovery device, a computer readable storage medium and a vehicle for a fuel cell, which at least solve the problem that in the prior art, the oxidation of a catalyst of the fuel cell causes the performance attenuation of the fuel cell under the high-potential working conditions of idling, low speed and the like.

In order to achieve the above object, according to one aspect of the present application, there is provided a performance recovery method of a fuel cell, comprising: obtaining a target mark, and obtaining a target vehicle speed when the target mark is in a running state of an engine and a recovery accumulated time length is greater than a first threshold value and/or a battery performance loss is greater than a second threshold value, wherein the target mark is used for representing whether the engine is in the running state, the target vehicle speed is a running speed of a current moment of a vehicle, the recovery accumulated time length is an accumulated time from a moment when a fuel battery performs performance recovery last time to the current moment, the battery performance loss is a percentage of reduction of an average value of an output voltage of a battery cell in the fuel battery at the current moment and an average value of the output voltage of the battery cell in the fuel battery at a target moment, and the target moment is a preset time length before the current moment and is spaced from the current moment; acquiring a target reserve and a target electric quantity under the condition that the target vehicle speed is 0, and activating a recovery function under the condition that the target reserve is larger than a third threshold value and the target electric quantity is smaller than a fourth threshold value and larger than a fifth threshold value, wherein the target reserve is the residual quantity of hydrogen in the fuel cell, the target electric quantity is the residual quantity of a power cell, and the recovery function is used for recovering the performance of the fuel cell by enabling a cathode of the fuel cell to be in an underinflated state and reducing an oxide layer on the surface of a cathode catalyst; and acquiring the target electric quantity and the target reserve quantity under the condition that the target vehicle speed is not 0, and activating the recovery function under the condition that the target electric quantity is larger than a sixth threshold value and the target reserve quantity is larger than a third threshold value.

Optionally, before obtaining the target power and the target reserve, the method further comprises: calculating a first average value according to a first output voltage and a target number, and calculating a second average value according to a second output voltage and the target number, wherein the first output voltage is the output voltage of the fuel cell at a target moment, the second output voltage is the output voltage of the fuel cell at the current moment, and the target number is the number of battery cells in the fuel cell; and calculating the difference value of the second average value and the first average value to obtain a voltage drop, and calculating the ratio of the voltage drop to the first average value to obtain the battery performance loss.

Optionally, acquiring the target identifier and the target vehicle speed includes: acquiring a first fault identifier, wherein the first fault identifier is used for judging whether the fuel cell has a fault or not; adding an invalid identifier to the recovery accumulated time length and the battery performance loss and sending out first alarm information when the first fault identifier is a fault, and not allowing the target identifier to be acquired when the recovery accumulated time length and the battery performance have the invalid identifier; and under the condition that the first fault identification is fault-free, acquiring the target identification.

Optionally, after acquiring the target electric quantity and the target reserve in the case where the target vehicle speed is not 0, the method further includes: and switching a driving mode of the vehicle to a target mode, wherein the target mode is that the vehicle consumes energy and is provided by the residual electric quantity of the power battery, under the condition that the target electric quantity is larger than a sixth threshold value and the target reserve is larger than the third threshold value.

Optionally, activating the recovery function includes: acquiring a second fault identifier under the condition that the driving mode is the target mode, wherein the second fault identifier is used for representing whether the vehicle has a fault or not; sending out second alarm information under the condition that the second fault mark is a fault; and activating the recovery function in the event that the second fault is identified as no fault.

Optionally, activating the recovery function includes: inquiring a first mapping relation according to the battery performance loss to obtain a target voltage corresponding to the battery performance loss, wherein the target voltage is the output voltage of the fuel battery, and the first mapping relation is the mapping relation between the battery performance loss and the target voltage; inquiring a second mapping relation according to the battery performance loss to obtain a target temperature corresponding to the battery performance loss, wherein the target temperature is the cooling liquid temperature of the fuel battery, and the second mapping relation is the mapping relation between the battery performance loss and the target temperature; inquiring a third mapping relation according to the battery performance loss to obtain a second target rotating speed corresponding to the battery performance loss, wherein the second target rotating speed is the rotating speed of an air compressor, the air compressor is used for supplying air to a cathode of the fuel cell, and the third mapping relation is the mapping relation between the battery performance loss and the second target rotating speed; and under the condition that the input temperature of the cooling liquid is the target temperature and the rotating speed of the air compressor is the second target rotating speed, adjusting the opening degree of a ventilation valve according to the target voltage to ensure that the difference value between the actual output voltage of the fuel cell and the target voltage is smaller than a seventh threshold value, wherein the ventilation valve is used for controlling the flow rate of air supplied to the cathode by the air compressor.

Optionally, after activating the recovery function, the method further comprises: inquiring a fourth mapping relation according to the battery performance loss and the corresponding target voltage to obtain a target recovery time length, wherein the target recovery time length is a recovery time length corresponding to the battery performance loss and the corresponding target voltage, the recovery time length is the maximum duration action time length of the recovery function, and the fourth mapping relation is a mapping relation of the battery performance loss, the target voltage and the recovery time length; and acquiring a recovery duration, and closing the recovery function under the condition that the recovery duration is longer than or equal to the target recovery duration, wherein the recovery duration is the duration of action after the recovery function is activated.

According to another aspect of the present application, there is provided a performance recovery apparatus for a fuel cell, the apparatus comprising: a first obtaining unit, configured to obtain a target identifier, and obtain a target vehicle speed when the target identifier is in an engine running state and a recovery accumulated time length is greater than a first threshold value and/or a battery performance loss is greater than a second threshold value, where the target identifier is used to characterize whether the engine is in the running state, the target vehicle speed is a running speed at a current time of a vehicle, the recovery accumulated time length is an accumulated time from a time point when a fuel cell performs performance recovery last time to the current time point, and the battery performance loss is a percentage of a decrease between an average value of an output voltage of a battery cell in the fuel cell at the current time point and an average value of the output voltage of the battery cell in the fuel cell at a target time point, and the target time point is a preset time length before the current time point and spaced from the current time point; a second obtaining unit configured to obtain a target reserve and a target electric quantity when the target vehicle speed is 0, and activate a recovery function when the target reserve is greater than a third threshold and the target electric quantity is less than a fourth threshold and greater than a fifth threshold, the target reserve being a remaining amount of hydrogen in the fuel cell, the target electric quantity being a remaining amount of the power cell, the recovery function being configured to recover performance of the fuel cell by causing the fuel cell cathode to be in an underinflated state, and reducing an oxide layer on a cathode catalyst surface; and a third obtaining unit configured to obtain the target electric quantity and the target reserve capacity when the target vehicle speed is not 0, and activate the recovery function when the target electric quantity is greater than a sixth threshold and the target reserve capacity is greater than the third threshold.

According to still another aspect of the present application, there is provided a computer readable storage medium including a stored program, wherein the program when run controls a device in which the computer readable storage medium is located to perform any one of the methods.

According to still another aspect of the present application, there is provided a vehicle including: one or more processors, memory, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs comprising instructions for performing any of the methods.

In the performance recovery method of the fuel cell, firstly, a target mark is obtained, and when the target mark is that an engine is in an operating state and a recovery accumulated time is longer than a first threshold value and/or a battery performance loss is longer than a second threshold value, a target vehicle speed is obtained, wherein the target mark is used for representing whether the engine is in the operating state, the target vehicle speed is a running speed of a current moment of a vehicle, the recovery accumulated time length is an accumulated time from the moment when the performance recovery of the fuel cell is last performed to the current moment, the battery performance loss is a percentage of reduction of an average value of an output voltage of a battery monomer in the fuel cell at the current moment and an average value of the output voltage of the battery monomer in the fuel cell at the target moment, and the target moment is a preset time interval before the current moment; then, when the target vehicle speed is 0, acquiring a target reserve and a target electric quantity, and when the target reserve is greater than a third threshold value and the target electric quantity is less than a fourth threshold value and greater than a fifth threshold value, activating a recovery function, wherein the target reserve is a remaining amount of hydrogen in the fuel cell, the target electric quantity is a remaining amount of the power cell, and the recovery function is used for recovering the performance of the fuel cell by reducing an oxide layer on a surface of a cathode catalyst by putting the cathode of the fuel cell in an underinflated state; finally, the target electric quantity and the target reserve are acquired when the target vehicle speed is not 0, and the recovery function is activated when the target electric quantity is greater than a sixth threshold and the target reserve is greater than the third threshold. According to the application, the performance recovery of the fuel cell or the cell performance attenuation of the fuel cell is periodically carried out or monitored by setting the interval time, and the recovery of the fuel cell is carried out under the condition that the cell performance attenuation meets the condition, so that the autonomous recovery function of the fuel cell is realized. Furthermore, the application provides the method for detecting the rotating speed of the transmitter under the condition of meeting the recovery condition of the fuel cell, and determining whether the current working condition meets the activation condition of the recovery function or not by monitoring different parameters so as to determine whether the recovery function is activated or not, thereby realizing the recovery of the battery performance in the driving process or the whole vehicle process and improving the driving comfort. The application solves the problem of fuel cell performance attenuation caused by oxidation of the fuel cell catalyst under the working conditions of idling, low speed and the like of the vehicle.

Drawings

Fig. 1 is a block diagram showing a hardware configuration of a mobile terminal for performance recovery of a fuel cell provided in an embodiment according to the present application;

fig. 2 is a flow chart schematically showing a performance recovery method of a fuel cell according to an embodiment of the present application;

fig. 3 is a flowchart of a restoration function activation determination method according to an embodiment of the present application;

FIG. 4 is a flow diagram of a recovery function provided in accordance with an embodiment of the present application;

FIG. 5 is a flow chart illustrating a specific fuel cell performance recovery method according to an embodiment of the present application;

fig. 6 shows a block diagram of a performance recovery apparatus of a fuel cell according to an embodiment of the present application.

Wherein the above figures include the following reference numerals:

102. a processor; 104. a memory; 106. a transmission device; 108. and an input/output device.

Detailed Description

It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.

In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the application herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

For convenience of description, the following will describe some terms or terminology involved in the embodiments of the present application:

proton exchange membrane fuel cells: one type of fuel cell employs an ion-conductive polymeric membrane as the electrolyte.

Air starvation: also called a cathode undergas method, is a fuel cell performance recovery method. That is, the supply of air to the cathode is reduced during the operation state of the fuel cell, and the oxide layer on the surface of the catalyst is reduced at a low potential.

FCU: a Fuel cell main controller (Fuel-cell Control Unit).

VCU: and the whole vehicle controller.

SOC: state of charge of the power cell.

As described in the background art, in the prior art, during the long-term operation of the fuel cell, the catalyst of the cathode will undergo oxidation reaction, and an oxide layer is formed on the surface of the catalyst of the cathode, so that the active area of the catalyst is reduced, and the performance of the fuel cell is reduced.

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application.

The method embodiments provided in the embodiments of the present application may be performed in a mobile terminal, a computer terminal or similar computing device. Taking a mobile terminal as an example, fig. 1 is a block diagram of a hardware structure of a mobile terminal of a performance recovery method of a fuel cell according to an embodiment of the present application. As shown in fig. 1, a mobile terminal may include one or more (only one is shown in fig. 1) processors 102 (the processor 102 may include, but is not limited to, a microprocessor MCU or a processing device such as a programmable logic device FPGA) and a memory 104 for storing data, wherein the mobile terminal may also include a transmission device 106 for communication functions and an input-output device 108. It will be appreciated by those skilled in the art that the structure shown in fig. 1 is merely illustrative and not limiting of the structure of the mobile terminal described above. For example, the mobile terminal may also include more or fewer components than shown in fig. 1, or have a different configuration than shown in fig. 1.

The memory 104 may be used to store a computer program, for example, a software program of application software and a module, such as a computer program corresponding to a display method of device information in an embodiment of the present invention, and the processor 102 executes the computer program stored in the memory 104 to perform various functional applications and data processing, that is, to implement the above-described method. Memory 104 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include memory remotely located relative to the processor 102, which may be connected to the mobile terminal via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof. The transmission device 106 is used to receive or transmit data via a network. Specific examples of the network described above may include a wireless network provided by a communication provider of the mobile terminal. In one example, the transmission device 106 includes a network adapter (Network Interface Controller, simply referred to as NIC) that can connect to other network devices through a base station to communicate with the internet. In one example, the transmission device 106 may be a Radio Frequency (RF) module, which is configured to communicate with the internet wirelessly.

In the present embodiment, a performance recovery method of a fuel cell operating on a mobile terminal, a computer terminal, or a similar computing device is provided, it is to be noted that the steps shown in the flowcharts of the drawings may be executed in a computer system such as a set of computer executable instructions, and that although a logical order is shown in the flowcharts, in some cases the steps shown or described may be executed in an order different from that shown here.

Fig. 2 is a flowchart of a performance recovery method of a fuel cell according to an embodiment of the present application. As shown in fig. 2, the method comprises the steps of:

step S201, obtaining a target mark, and obtaining a target vehicle speed when the target mark is in an operating state of an engine and the recovery accumulated time length is larger than a first threshold value and/or the battery performance loss is larger than a second threshold value, wherein the target mark is used for representing whether the engine is in the operating state, the target vehicle speed is the running speed of the current moment of the vehicle, the recovery accumulated time length is the accumulated time from the moment when the fuel cell performs performance recovery last time to the current moment, the battery performance loss is the percentage of reduction of the average value of the output voltage of a battery cell in the fuel cell at the current moment and the average value of the output voltage of the battery cell in the fuel cell at the target moment, and the target moment is a preset time length before the current moment and at intervals from the current moment;

Specifically, the operation state of the fuel cell is monitored by the fuel cell controller, as shown in fig. 3, after a time T1 has elapsed from the end time of the last performance recovery state or within a preset period of time before the current time, the average voltage of the cells in the stack is reduced by a percentage reaching a, it is determined that the performance recovery of the cell is required, and at this time, the operation state of the transmitter and the vehicle speed are obtained, and the operation state of the current vehicle is determined.

Step S202, obtaining a target reserve and a target electric quantity when the target vehicle speed is 0, and activating a recovery function when the target reserve is greater than a third threshold value and the target electric quantity is less than a fourth threshold value and greater than a fifth threshold value, wherein the target reserve is the residual quantity of hydrogen in the fuel cell, the target electric quantity is the residual quantity of the power cell, and the recovery function is used for recovering the performance of the fuel cell by making the cathode of the fuel cell in an underinflated state and reducing an oxide layer on the surface of a cathode catalyst;

specifically, as shown in fig. 3, when the engine is in a running state and the target vehicle speed is 0, it is determined that the vehicle is in a complete vehicle process, the vehicle has no running requirement, at this time, the hydrogen remaining amount of the fuel cell is obtained and the remaining electric quantity of the power cell is obtained, and when it is determined that the hydrogen storage amount and the remaining electric quantity, that is, the target storage amount is greater than a corresponding preset value and the target electric quantity is within a preset range, it is determined that the remaining hydrogen is sufficient to support completion of a performance recovery process and the electric quantity in the power cell is sufficient to maintain the engine in the running state, the recovery function is activated, so that the cathode is in an underinflated state, a reduction reaction occurs at the cathode, an oxide layer on the surface of the catalyst is reduced, and the active area of the catalyst is further increased.

Step S203, when the target vehicle speed is not 0, acquiring the target electric quantity and the target reserve, and when the target electric quantity is greater than a sixth threshold value and the target reserve is greater than the third threshold value, activating the recovery function.

Specifically, as shown in fig. 3, in the case where the rotational speed of the engine is not 0, it is determined that the recovery process is required to be performed during the running process, because the fuel cell cannot normally supply power during the recovery process, it is also ensured that the remaining amount of electricity in the power cell needs to be sufficient to support the running of the vehicle in the case where the target amount of electricity is greater than a preset value in addition to determining whether the remaining amount of hydrogen in the fuel cell satisfies the requirement, it is determined that the remaining amount of electricity in the power cell can support the normal running of the vehicle before the recovery of the fuel cell is completed, and the recovery function is activated to recover the performance of the fuel cell. It should be noted that the sixth threshold is greater than the fourth threshold.

Through the embodiment, first, a target identifier is obtained, and a target vehicle speed is obtained when the target identifier is in an operating state of an engine and a recovery accumulated time length is greater than a first threshold value and/or a battery performance loss is greater than a second threshold value, where the target identifier is used for representing whether the engine is in the operating state, the target vehicle speed is a running speed of a current moment of the vehicle, the recovery accumulated time length is an accumulated time from a moment when the fuel cell performs performance recovery last time to the current moment, and the battery performance loss is a percentage of reduction of an average value of an output voltage of a battery cell in the fuel cell at the current moment compared with an average value of the output voltage of the battery cell in the fuel cell at the target moment, and the target moment is a preset time length before the current moment and at a preset time interval from the current moment; then, when the target vehicle speed is 0, acquiring a target reserve and a target electric quantity, and when the target reserve is greater than a third threshold value and the target electric quantity is less than a fourth threshold value and greater than a fifth threshold value, activating a recovery function, wherein the target reserve is a remaining amount of hydrogen in the fuel cell, the target electric quantity is a remaining amount of the power cell, and the recovery function is used for recovering the performance of the fuel cell by reducing an oxide layer on a surface of a cathode catalyst by putting the cathode of the fuel cell in an underinflated state; finally, the target electric quantity and the target reserve are acquired when the target vehicle speed is not 0, and the recovery function is activated when the target electric quantity is greater than a sixth threshold and the target reserve is greater than the third threshold. According to the application, the performance recovery of the fuel cell or the cell performance attenuation of the fuel cell is periodically carried out or monitored by setting the interval time, and the recovery of the fuel cell is carried out under the condition that the cell performance attenuation meets the condition, so that the autonomous recovery function of the fuel cell is realized. Furthermore, the application provides the method for detecting the rotating speed of the transmitter under the condition of meeting the recovery condition of the fuel cell, and determining whether the current working condition meets the activation condition of the recovery function or not by monitoring different parameters so as to determine whether the recovery function is activated or not, thereby realizing the recovery of the battery performance in the driving process or the whole vehicle process and improving the driving comfort. The application solves the problem of fuel cell performance attenuation caused by oxidation of the fuel cell catalyst under the working conditions of idling, low speed and the like of the vehicle.

To determine the degree of depletion of the fuel cell catalyst, in an alternative embodiment, the method further comprises, prior to obtaining the target electrical quantity and the target reserve:

step S301 of calculating a first average value from a first output voltage and a target number, and calculating a second average value from a second output voltage and the target number, wherein the first output voltage is the output voltage of the fuel cell at a target time, the second output voltage is the output voltage of the fuel cell at the current time, and the target number is the number of the battery cells in the fuel cell;

specifically, the total output voltage of the fuel cell at the current time, that is, the second output voltage, is obtained, and the total output voltage of the fuel cell at the time before the preset time period from the current time, that is, the first output voltage, is obtained. Further, according to the number of the single units in the electric pile of the fuel cell, determining the average output voltage of each single unit, and obtaining the first average value and the second average value.

Step S302, calculating the difference between the second average value and the first average value to obtain a voltage drop, and calculating the ratio of the voltage drop to the first average value to obtain the battery performance loss.

Specifically, the reduced output voltage of the fuel cell can be determined according to the difference between the first average value and the second average value, and then the percentage of the reduced voltage to the first average value is calculated, and the loss degree of the cell performance is represented by the percentage of the reduced voltage.

In order to ensure that the activation condition of the recovery process is determined accurately, in an alternative embodiment, the step S201 includes:

step S2011, a first fault identifier is obtained, wherein the first fault identifier is used for judging whether the fuel cell has a fault or not;

specifically, as shown in fig. 3, in order to ensure the accuracy of the decision, it is necessary to ensure that the working condition satisfying the condition is not caused by a fault, on the basis of determining that the fuel cell at the current moment satisfies the condition for activating the recovery function, so that it is necessary to confirm whether the fuel cell is faulty, that is, to acquire the first fault identifier.

Step S2012, when the first fault identifier is a fault, adding an invalid identifier to the recovery accumulated time length and the battery performance loss and sending out first alarm information, wherein when the recovery accumulated time length and the battery performance have the invalid identifier, the acquisition of the target identifier is not allowed;

Specifically, as shown in fig. 3, in the case of a fuel cell failure, since performance degradation of the fuel cell may be caused by a failure such as pile leakage, instead of aging in the adaptation process of the cell itself, relevant alarm information, that is, the first alarm information, is sent to prompt a driver to overhaul or replace the fuel cell, so that the inaccuracy of the decision data at the current moment can be determined, and further, invalid identifiers are added to the recovery accumulation duration and the cell performance loss, so that a subsequent recovery process is not performed.

Step S2013, obtaining the target identifier when the first fault identifier is fault-free.

Specifically, as shown in fig. 3, in the case where the degradation of the performance of the fuel cell is caused by the aging of the cell itself during use, it is determined that the activation of the recovery function is required at the present time to recover the cell function. And allowing the target identifier to be acquired, and carrying out the next judging process.

In order to ensure normal running of the vehicle during the recovery function, in an alternative embodiment, after the target electric quantity and the target reserve are obtained in the case where the target vehicle speed is not 0, the method further includes:

In step S401, when the target electric quantity is greater than the sixth threshold value and the target reserve amount is greater than the third threshold value, the driving mode of the vehicle is switched to a target mode, and the target mode is the vehicle energy consumption provided by the remaining electric quantity of the power battery.

Specifically, in the case where it is determined that the hydrogen storage amount in the fuel cell satisfies the consumption in the recovery process and the remaining amount in the above-described power cell satisfies the running demand in the recovery process, the driving power supply of the vehicle is switched, the function of the fuel cell is cut off, and the energy consumption in the running process of the vehicle is supported with the remaining amount of the above-described power cell.

In order to determine that the recovery function can operate normally, in an alternative embodiment, the step S203 includes:

step S2031, when the driving mode is the target mode, acquiring a second failure identifier, where the second failure identifier is used to indicate whether the vehicle has a failure;

specifically, when it is determined that the current running state of the fuel cell meets the activation requirement of the recovery function, the overall running state of the vehicle is verified after the power mode of the vehicle is switched, so as to ensure the safety in the driving process, and the second fault identifier is obtained.

Step S2032, when the second failure is identified as a failure, sending out second alarm information;

specifically, after the power mode of the driving is switched, if the vehicle cannot normally run, relevant alarm information, namely the second alarm information, is sent out, so that a driver is prompted to overhaul the vehicle, and potential safety hazards are eliminated.

Step S2033, activating the recovery function when the second failure is identified as no failure.

Specifically, in the case where the vehicle can normally run after the power mode of the drive is switched, it is determined that the vehicle can be supported by the remaining amount of electricity in the power battery for normal running, and at this time, the above-described recovery function is activated to perform recovery of the battery performance.

In order to restore the performance of the fuel cell, in an alternative embodiment, as shown in fig. 4, the step S203 further includes:

step S2034 of obtaining a target voltage corresponding to the battery performance loss by searching a first map of the battery performance loss, the target voltage being the output voltage of the fuel cell, the first map being a map of the battery performance loss and the target voltage;

specifically, a first mapping relation is queried according to the battery performance loss to obtain a target voltage corresponding to the battery performance loss, namely, an optimal total output voltage for performance recovery is determined according to the aging degree of the fuel battery at the current moment.

In a specific implementation, in order to ensure that the oxidant reduction process on the surface of the catalyst proceeds smoothly, it is necessary to keep the cathode in a low level state, i.e., to control the target voltage to be less than a preset value.

Step S2035, obtaining a target temperature corresponding to the battery performance loss by querying a second mapping relationship according to the battery performance loss, where the target temperature is a coolant temperature of the fuel cell, and the second mapping relationship is a mapping relationship between the battery performance loss and the target temperature;

specifically, a second mapping relation is queried according to the battery performance loss to obtain a target temperature corresponding to the battery performance loss, namely, an optimal cooling liquid input temperature for performance recovery is determined according to the aging degree of the fuel battery at the current moment so as to meet the heat dissipation of the fuel battery in the reduction reaction process.

Step S2036, obtaining a second target rotation speed corresponding to the battery performance loss according to the battery performance loss query third mapping relationship, where the second target rotation speed is a rotation speed of an air compressor, the air compressor is used for supplying air to a cathode of the fuel cell, and the third mapping relationship is a mapping relationship between the battery performance loss and the second target rotation speed;

Specifically, a third mapping relation is queried according to the battery performance loss to obtain a second target rotating speed corresponding to the battery performance loss, namely, the optimal air input flow rate for performance recovery is determined according to the aging degree of the fuel battery at the current moment, so that the cathode is in an underinflated state.

In particular, in order to ensure the smooth progress of the oxidant reduction process on the catalyst surface, it is necessary to suppress the flow rate of the input air, and the actual purpose is to control the amount of oxygen input to the cathode, so that the above-mentioned second target rotation speed is ensured to be lower than a preset value.

In step S2037, when the input temperature of the coolant is the target temperature and the rotational speed of the air compressor is the second target rotational speed, the opening degree of a vent valve for controlling the flow rate of the air supplied from the air compressor to the cathode is adjusted according to the target voltage so that the difference between the actual output voltage of the fuel cell and the target voltage is smaller than a seventh threshold value.

Specifically, when the stable working condition of the fuel cell is maintained, that is, when the input temperature of the coolant is maintained at the target temperature and the rotational speed of the air compressor is maintained at the second target rotational speed, the opening of the vent valve of the fuel cell is adjusted to adjust the air flow rate of the cathode for reaction, so that the total output voltage of the fuel cell is equal to the target voltage.

In a specific implementation, the target current value can be calibrated in the recovery process, and the voltage change of the fuel cell is adjusted along with the vent valve by monitoring, so that the total output current of the fuel cell reaches the target current.

In order to prevent damage to the fuel cell caused by excessive durations of the recovery process, in an alternative embodiment, after activating the recovery function, the method further comprises:

step S501, inquiring a fourth mapping relation according to the battery performance loss and the corresponding target voltage to obtain a target recovery time length, where the target recovery time length is a recovery time length corresponding to the battery performance loss and the corresponding target voltage, the recovery time length is a maximum duration action time length of the recovery function, and the fourth mapping relation is a mapping relation of the battery performance loss, the target voltage and the recovery time length;

specifically, a preset table is queried according to the working condition for performance recovery, and the maximum time allowed for performance recovery under the current working condition is determined.

Step S502, obtaining a recovery duration, where the recovery duration is a duration after the recovery function is activated, and closing the recovery function when the recovery duration is greater than or equal to the target recovery duration.

Specifically, since the performance recovery process of the fuel cell requires that the cathode be in an underinflated state, maintaining the underinflated state for a long time may cause the life of the fuel cell to be reduced, and thus the recovery function is turned off and normal gas supply to the cathode is resumed in the case where the duration of the recovery function reaches the maximum duration of action under the current operating conditions.

In order to enable those skilled in the art to more clearly understand the technical solution of the present application, the implementation procedure of the performance recovery method of a fuel cell of the present application will be described in detail with reference to specific embodiments.

The present embodiment relates to a specific performance recovery method of a fuel cell, as shown in fig. 5, including the steps of:

step S1: the FCU judges the running state of the fuel cell and the running state of the vehicle, and sends a performance recovery request instruction to the VCU when the running state of the engine (condition A) is satisfied, the average output voltage of the single body in the fuel cell is reduced by a percentage which is equal to or less than the time period of T2 when the accumulated running time after the last performance recovery instruction of the FCU reaches T1 or the same output current reaches A (condition B) and the engine is free of faults (condition C);

Step S2: the VCU judges the running state of the whole vehicle, and executes the performance recovery instruction under the condition that the performance recovery request instruction (condition D), the SOC electric quantity is more than or equal to B (condition E), the hydrogen residual quantity is more than or equal to C (condition F) and the whole vehicle has no fault (condition G) are received;

step S3: the VCU judges in the performance recovery process, and terminates the performance recovery instruction when the continuous recovery time exceeds the target time (condition H) or the FCU or VCU reports a fault (condition I);

step S4: recording the termination time t of the performance recovery instruction, accumulating the time of the next cycle, and jumping to step S1.

It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer executable instructions, and that although a logical order is illustrated in the flowcharts, in some cases the steps illustrated or described may be performed in an order other than that illustrated herein.

The embodiment of the application also provides a performance recovery device of the fuel cell, and the performance recovery device of the fuel cell can be used for executing the performance recovery method for the fuel cell. The device is used for realizing the above embodiments and preferred embodiments, and is not described in detail. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. While the means described in the following embodiments are preferably implemented in software, implementation in hardware, or a combination of software and hardware, is also possible and contemplated.

The performance recovery device of the fuel cell provided by the embodiment of the application is described below.

Fig. 6 is a block diagram of a performance recovery apparatus of a fuel cell according to an embodiment of the present application. As shown in fig. 6, the apparatus includes:

a first obtaining unit 10 configured to obtain a target vehicle speed, where the target vehicle speed is a running speed at a current time of a vehicle, and where the target vehicle speed is a running speed at the current time of the vehicle, and where a recovery integrated time period is an integrated time period from a time point at which performance recovery of the fuel cell is last performed to the current time point, and where the battery performance loss is a percentage of a decrease in an average value of an output voltage of a battery cell in the fuel cell at the current time point and an average value of the output voltage of the battery cell in the fuel cell at the target time point, the target time point being a preset time period before the current time point and at an interval from the current time point, when the target vehicle speed is the running state where the target vehicle speed is the running speed at the current time point and the recovery integrated time period is greater than the first threshold value and/or where the battery performance loss is greater than the second threshold value;

A second obtaining unit 20 configured to obtain a target reserve and a target electric quantity when the target vehicle speed is 0, and activate a recovery function when the target reserve is greater than a third threshold value and the target electric quantity is less than a fourth threshold value and greater than a fifth threshold value, the target reserve being a remaining amount of hydrogen in the fuel cell, the target electric quantity being a remaining amount of the power cell, the recovery function being configured to recover performance of the fuel cell by reducing an oxide layer on a surface of a cathode catalyst by causing the fuel cell cathode to be in an underinflated state;

And a third acquiring unit 30 configured to acquire the target electric quantity and the target reserve quantity when the target vehicle speed is not 0, and activate the recovery function when the target electric quantity is greater than a sixth threshold value and the target reserve quantity is greater than the third threshold value.

Specifically, as shown in fig. 3, in the case where the rotational speed of the engine is not 0, it is determined that the recovery process is required to be performed during the running because the fuel cell cannot normally supply power during the recovery process, it is also ensured that the remaining amount of electricity in the power cell needs to be sufficient to support the running of the vehicle in addition to determining whether the remaining amount of hydrogen in the fuel cell satisfies the requirement, and in the case where the target amount of electricity is greater than a preset value, it is determined that the remaining amount of electricity in the power cell can support the running of the vehicle normally before the recovery of the fuel cell is completed, and the recovery function is activated to recover the performance of the fuel cell. It should be noted that the sixth threshold is greater than the fourth threshold.

According to the embodiment, a first obtaining unit obtains a target identifier, and obtains a target vehicle speed when the target identifier is in an operating state of an engine and a recovery accumulated time length is greater than a first threshold value and/or a battery performance loss is greater than a second threshold value, wherein the target identifier is used for representing whether the engine is in the operating state, the target vehicle speed is a running speed of a current moment of a vehicle, the recovery accumulated time length is an accumulated time from a moment when the fuel cell performs performance recovery last time to the current moment, the battery performance loss is a percentage of reduction of an average value of an output voltage of a battery cell in the fuel cell at the current moment and an average value of the output voltage of the battery cell in the fuel cell at the target moment, and the target moment is a preset time length before the current moment and at a preset time interval from the current moment; the second obtaining unit obtains a target reserve and a target electric quantity when the target vehicle speed is 0, and activates a recovery function when the target reserve is greater than a third threshold value and the target electric quantity is less than a fourth threshold value and greater than a fifth threshold value, the target reserve being a remaining amount of hydrogen in the fuel cell, the target electric quantity being a remaining amount of the power cell, the recovery function being configured to recover performance of the fuel cell by causing the fuel cell cathode to be in an underinflated state and reducing an oxide layer on a surface of a cathode catalyst; and a third acquisition unit that acquires the target electric quantity and the target reserve amount when the target vehicle speed is not 0, and activates the recovery function when the target electric quantity is greater than a sixth threshold value and the target reserve amount is greater than the third threshold value. According to the application, the performance recovery of the fuel cell or the cell performance attenuation of the fuel cell is periodically carried out or monitored by setting the interval time, and the recovery of the fuel cell is carried out under the condition that the cell performance attenuation meets the condition, so that the autonomous recovery function of the fuel cell is realized. Furthermore, the application provides the method for detecting the rotating speed of the transmitter under the condition of meeting the recovery condition of the fuel cell, and determining whether the current working condition meets the activation condition of the recovery function or not by monitoring different parameters so as to determine whether the recovery function is activated or not, thereby realizing the recovery of the battery performance in the driving process or the whole vehicle process and improving the driving comfort. The application solves the problem of fuel cell performance attenuation caused by oxidation of the fuel cell catalyst under the working conditions of idling, low speed and the like of the vehicle.

In order to determine the degree of depletion of the fuel cell catalyst, in an alternative embodiment, the apparatus further comprises:

a first calculation unit configured to calculate a first average value from a first output voltage and a target number of cells before acquiring a target electric quantity and a target reserve, and calculate a second average value from a second output voltage and the target number of cells, the first output voltage being the output voltage of the fuel cell at a target time, the second output voltage being the output voltage of the fuel cell at the current time, the target number being the number of the cells in the fuel cell;

And the second calculation unit is used for calculating the difference value between the second average value and the first average value to obtain a voltage drop, and calculating the ratio of the voltage drop to the first average value to obtain the battery performance loss.

In order to ensure that the activation condition of the recovery process is determined accurately, in an alternative embodiment, the first obtaining unit includes:

the first acquisition module is used for acquiring a first fault identifier, wherein the first fault identifier is used for judging whether the fuel cell has a fault or not;

The first alarm module is used for adding an invalid identifier to the recovery accumulated time length and the battery performance loss and sending out first alarm information when the first fault identifier is a fault, and not allowing the target identifier to be acquired when the recovery accumulated time length and the battery performance are the invalid identifier;

And the second acquisition module is used for acquiring the target identifier under the condition that the first fault identifier is fault-free.

Specifically, as shown in fig. 3, in the case where the degradation of the performance of the fuel cell is caused by the aging of the cell itself during use, it is determined that the activation of the recovery function is required at the present time to recover the cell function. And allowing the target identifier to be acquired for the next judging process.

In order to ensure proper running of the vehicle during the restoration function, in an alternative embodiment, the apparatus further comprises:

and a switching unit configured to, when the target vehicle speed is not 0, acquire a target electric quantity and the target reserve quantity, and then switch a driving mode of the vehicle to a target mode when the target electric quantity is greater than a sixth threshold value and the target reserve quantity is greater than the third threshold value, the target mode being the vehicle energy consumption provided by a remaining electric quantity of the power battery.

In order to determine that the recovery function can operate normally, in an alternative embodiment, the third obtaining unit includes:

the third acquisition module is used for acquiring a second fault identifier which is used for representing whether the vehicle has a fault or not under the condition that the driving mode is the target mode;

The second alarm module is used for sending out second alarm information under the condition that the second fault mark is a fault;

And the activation module is used for activating the recovery function under the condition that the second fault mark is no fault.

In order to restore the performance of the fuel cell, in an alternative embodiment, as shown in fig. 4, the third obtaining unit further includes:

a first query module configured to query a first map of the battery performance loss to obtain a target voltage corresponding to the battery performance loss, where the target voltage is the output voltage of the fuel cell, and the first map is a map of the battery performance loss and the target voltage;

A second query module configured to query a second mapping relationship according to the battery performance loss to obtain a target temperature corresponding to the battery performance loss, where the target temperature is a coolant temperature of the fuel cell, and the second mapping relationship is a mapping relationship between the battery performance loss and the target temperature;

A third query module, configured to query a third mapping relationship according to the battery performance loss to obtain a second target rotation speed corresponding to the battery performance loss, where the second target rotation speed is a rotation speed of an air compressor, the air compressor is configured to supply air to a cathode of the fuel cell, and the third mapping relationship is a mapping relationship between the battery performance loss and the second target rotation speed;

And an adjustment module configured to adjust an opening of a vent valve according to the target voltage so that a difference between an actual output voltage of the fuel cell and the target voltage is smaller than a seventh threshold value when an input temperature of the coolant is the target temperature and a rotational speed of the air compressor is a second target rotational speed, the vent valve being configured to control a flow rate of the air supplied from the air compressor to the cathode.

In order to prevent damage to the fuel cell caused by excessive durations of the recovery process, in an alternative embodiment, the apparatus further comprises:

the inquiring unit is used for inquiring a fourth mapping relation to obtain a target recovery time length according to the battery performance loss and the corresponding target voltage after the recovery function is activated, wherein the target recovery time length is a recovery time length corresponding to the battery performance loss and the corresponding target voltage, the recovery time length is the maximum duration action time length of the recovery function, and the fourth mapping relation is a mapping relation of the battery performance loss, the target voltage and the recovery time length;

And the closing unit is used for acquiring the recovery duration, closing the recovery function under the condition that the recovery duration is longer than or equal to the target recovery duration, wherein the recovery duration is the duration after the recovery function is activated.

The performance recovery device of the fuel cell includes a processor and a memory, the first, second, third, and the like are stored as program units in the memory, and the processor executes the program units stored in the memory to realize corresponding functions. The modules are all located in the same processor; alternatively, the above modules may be located in different processors in any combination.

The processor includes a kernel, and the kernel fetches the corresponding program unit from the memory. The kernel may be provided with one or more kernel parameters to provide for recovery of fuel cell performance.

The memory may include volatile memory, random Access Memory (RAM), and/or nonvolatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM), among other forms in computer readable media, the memory including at least one memory chip.

The embodiment of the invention provides a computer readable storage medium, which comprises a stored program, wherein the device where the computer readable storage medium is located is controlled to execute the performance recovery method of the fuel cell when the program runs.

Specifically, the performance recovery method of the fuel cell includes:

specifically, as shown in fig. 3, when the engine is in a running state and the target vehicle speed is 0, it is determined that the vehicle is in a complete vehicle process, the vehicle has no running requirement, at this time, the hydrogen remaining amount of the fuel cell is obtained and the remaining electric quantity of the power cell is obtained, and when it is determined that the hydrogen storage amount and the remaining electric quantity, that is, the target storage amount is greater than the corresponding preset values, it is determined that the remaining hydrogen is sufficient to support completion of the performance recovery process and the electric quantity in the power cell is sufficient to maintain the engine in the running state, the recovery function is activated, the cathode is in an underinflated state, a reduction reaction occurs at the cathode, an oxide layer on the surface of the catalyst is reduced, and the active area of the catalyst is further increased.

The embodiment of the invention provides a processor, which is used for running a program, wherein the performance recovery method of the fuel cell is executed when the program runs.

Specifically, the performance recovery method of the fuel cell includes:

Step S202, obtaining a target reserve and a target electric quantity when the target vehicle speed is 0, and activating a recovery function when the target reserve is greater than a third threshold value and the target electric quantity is less than a fourth threshold value and greater than a sixth threshold value, wherein the target reserve is the residual quantity of hydrogen in the fuel cell, the target electric quantity is the residual quantity of the power cell, and the recovery function is used for recovering the performance of the fuel cell by making the cathode of the fuel cell in an underinflated state and reducing an oxide layer on the surface of a cathode catalyst;

The embodiment of the invention provides a vehicle, which comprises a processor, a memory and a program stored on the memory and capable of running on the processor, wherein the processor realizes at least the following steps when executing the program:

The application also provides a computer program product adapted to perform, when executed on a data processing device, a program initialized with at least the following method steps:

It will be appreciated by those skilled in the art that the modules or steps of the invention described above may be implemented in a general purpose computing device, they may be concentrated on a single computing device, or distributed across a network of computing devices, they may be implemented in program code executable by computing devices, so that they may be stored in a storage device for execution by computing devices, and in some cases, the steps shown or described may be performed in a different order than that shown or described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple modules or steps of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.

It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

In one typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.

The memory may include volatile memory in a computer-readable medium, random Access Memory (RAM) and/or nonvolatile memory, etc., such as Read Only Memory (ROM) or flash RAM. Memory is an example of a computer-readable medium.

Computer readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of storage media for a computer include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape disk storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by a computing device. Computer-readable media, as defined herein, does not include transitory computer-readable media (transmission media), such as modulated data signals and carrier waves.

It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises an element.

From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:

1) The performance recovery method of the fuel cell of the application, at first, obtain the target label, and in the situation that the above-mentioned target label is in the running state of the engine and resume the cumulative time length is greater than the first threshold value and/or battery performance loss is greater than the second threshold value, obtain the target speed, the above-mentioned target label is used for representing whether the engine is in the running state, the above-mentioned target speed is the running speed of the present moment of the vehicle, the above-mentioned resume cumulative time length is the cumulative time from moment to moment that the fuel cell resumes the performance last time, the above-mentioned battery performance loss is the above-mentioned average value of the battery monomer in the above-mentioned fuel cell of the above-mentioned present moment and above-mentioned average value of the battery monomer in the above-mentioned fuel cell of the target moment, the above-mentioned target moment is before the above-mentioned present moment and with the above-mentioned present moment interval presets the duration; then, when the target vehicle speed is 0, acquiring a target reserve and a target electric quantity, and when the target reserve is greater than a third threshold value and the target electric quantity is less than a fourth threshold value and greater than a fifth threshold value, activating a recovery function, wherein the target reserve is a remaining amount of hydrogen in the fuel cell, the target electric quantity is a remaining amount of the power cell, and the recovery function is used for recovering the performance of the fuel cell by reducing an oxide layer on a surface of a cathode catalyst by putting the cathode of the fuel cell in an underinflated state; finally, the target electric quantity and the target reserve are acquired when the target vehicle speed is not 0, and the recovery function is activated when the target electric quantity is greater than a sixth threshold and the target reserve is greater than the third threshold. According to the application, the performance recovery of the fuel cell or the cell performance attenuation of the fuel cell is periodically carried out or monitored by setting the interval time, and the recovery of the fuel cell is carried out under the condition that the cell performance attenuation meets the condition, so that the autonomous recovery function of the fuel cell is realized. Furthermore, the application provides the method for detecting the rotating speed of the transmitter under the condition of meeting the recovery condition of the fuel cell, and determining whether the current working condition meets the activation condition of the recovery function or not by monitoring different parameters so as to determine whether the recovery function is activated or not, thereby realizing the recovery of the battery performance in the driving process or the whole vehicle process and improving the driving comfort. The application solves the problem of fuel cell performance attenuation caused by oxidation of the fuel cell catalyst under the working conditions of idling, low speed and the like of the vehicle.

2) In the performance recovery device for a fuel cell of the present application, the first obtaining unit obtains a target identifier, and obtains a target vehicle speed when the target identifier is in an operating state of the engine and a recovery accumulated time period is longer than a first threshold value and/or a battery performance loss is longer than a second threshold value, the target identifier is used for representing whether the engine is in the operating state, the target vehicle speed is a running speed at a current time of the vehicle, the recovery accumulated time period is an accumulated time from a time point when the fuel cell performs performance recovery last time to the current time point, the battery performance loss is a percentage of a decrease compared with an average value of an output voltage of a battery cell in the fuel cell at the current time point and an average value of the output voltage of the battery cell in the fuel cell at the target time point, and the target time point is a preset time period before the current time point and at the current time point; the second obtaining unit obtains a target reserve and a target electric quantity when the target vehicle speed is 0, and activates a recovery function when the target reserve is greater than a third threshold value and the target electric quantity is less than a fourth threshold value and greater than a fifth threshold value, the target reserve being a remaining amount of hydrogen in the fuel cell, the target electric quantity being a remaining amount of the power cell, the recovery function being configured to recover performance of the fuel cell by causing the fuel cell cathode to be in an underinflated state and reducing an oxide layer on a surface of a cathode catalyst; and a third acquisition unit that acquires the target electric quantity and the target reserve amount when the target vehicle speed is not 0, and activates the recovery function when the target electric quantity is greater than a sixth threshold value and the target reserve amount is greater than the third threshold value. According to the application, the performance recovery of the fuel cell or the cell performance attenuation of the fuel cell is periodically carried out or monitored by setting the interval time, and the recovery of the fuel cell is carried out under the condition that the cell performance attenuation meets the condition, so that the autonomous recovery function of the fuel cell is realized. Furthermore, the application provides the method for detecting the rotating speed of the transmitter under the condition of meeting the recovery condition of the fuel cell, and determining whether the current working condition meets the activation condition of the recovery function or not by monitoring different parameters so as to determine whether the recovery function is activated or not, thereby realizing the recovery of the battery performance in the driving process or the whole vehicle process and improving the driving comfort. The application solves the problem of fuel cell performance attenuation caused by oxidation of the fuel cell catalyst under the working conditions of idling, low speed and the like of the vehicle.

The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A performance recovery method of a fuel cell, characterized by comprising:

obtaining a target mark, and obtaining a target vehicle speed when the target mark is in a running state of an engine and a recovery accumulated time length is greater than a first threshold value and/or a battery performance loss is greater than a second threshold value, wherein the target mark is used for representing whether the engine is in the running state, the target vehicle speed is a running speed of a current moment of a vehicle, the recovery accumulated time length is an accumulated time from a moment when a fuel battery performs performance recovery last time to the current moment, the battery performance loss is a percentage of reduction of an average value of an output voltage of a battery cell in the fuel battery at the current moment and an average value of the output voltage of the battery cell in the fuel battery at a target moment, and the target moment is a preset time length before the current moment and is spaced from the current moment;

Acquiring a target reserve and a target electric quantity under the condition that the target vehicle speed is 0, and activating a recovery function under the condition that the target reserve is larger than a third threshold value and the target electric quantity is smaller than a fourth threshold value and larger than a fifth threshold value, wherein the target reserve is the residual quantity of hydrogen in the fuel cell, the target electric quantity is the residual quantity of a power cell, and the recovery function is used for recovering the performance of the fuel cell by enabling a cathode of the fuel cell to be in an underinflated state and reducing an oxide layer on the surface of a cathode catalyst;

and acquiring the target electric quantity and the target reserve quantity under the condition that the target vehicle speed is not 0, and activating the recovery function under the condition that the target electric quantity is larger than a sixth threshold value and the target reserve quantity is larger than a third threshold value.

2. The method of claim 1, wherein prior to obtaining the target charge and the target reserve, the method further comprises:

calculating a first average value according to a first output voltage and a target number, and calculating a second average value according to a second output voltage and the target number, wherein the first output voltage is the output voltage of the fuel cell at a target moment, the second output voltage is the output voltage of the fuel cell at the current moment, and the target number is the number of battery cells in the fuel cell;

And calculating the difference value of the second average value and the first average value to obtain a voltage drop, and calculating the ratio of the voltage drop to the first average value to obtain the battery performance loss.

3. The method of claim 1, wherein obtaining the target identification and the target vehicle speed comprises:

acquiring a first fault identifier, wherein the first fault identifier is used for judging whether the fuel cell has a fault or not;

adding an invalid identifier to the recovery accumulated time length and the battery performance loss and sending out first alarm information when the first fault identifier is a fault, and not allowing the target identifier to be acquired when the recovery accumulated time length and the battery performance have the invalid identifier;

and under the condition that the first fault identification is fault-free, acquiring the target identification.

4. The method according to claim 1, wherein, in the case where the target vehicle speed is not 0, after acquiring the target electric quantity and the target reserve, the method further comprises:

and switching a driving mode of the vehicle to a target mode, wherein the target mode is that the vehicle consumes energy and is provided by the residual electric quantity of the power battery, under the condition that the target electric quantity is larger than a sixth threshold value and the target reserve is larger than the third threshold value.

5. The method of claim 4, wherein activating the resume function comprises:

acquiring a second fault identifier under the condition that the driving mode is the target mode, wherein the second fault identifier is used for representing whether the vehicle has a fault or not;

sending out second alarm information under the condition that the second fault mark is a fault;

and activating the recovery function in the event that the second fault is identified as no fault.

6. The method of claim 1, wherein activating the resume function comprises:

inquiring a first mapping relation according to the battery performance loss to obtain a target voltage corresponding to the battery performance loss, wherein the target voltage is the output voltage of the fuel battery, and the first mapping relation is the mapping relation between the battery performance loss and the target voltage;

inquiring a second mapping relation according to the battery performance loss to obtain a target temperature corresponding to the battery performance loss, wherein the target temperature is the cooling liquid temperature of the fuel battery, and the second mapping relation is the mapping relation between the battery performance loss and the target temperature;

Inquiring a third mapping relation according to the battery performance loss to obtain a second target rotating speed corresponding to the battery performance loss, wherein the second target rotating speed is the rotating speed of an air compressor, the air compressor is used for supplying air to a cathode of the fuel cell, and the third mapping relation is the mapping relation between the battery performance loss and the second target rotating speed;

and under the condition that the input temperature of the cooling liquid is the target temperature and the rotating speed of the air compressor is the second target rotating speed, adjusting the opening degree of a ventilation valve according to the target voltage to ensure that the difference value between the actual output voltage of the fuel cell and the target voltage is smaller than a seventh threshold value, wherein the ventilation valve is used for controlling the flow rate of air supplied to the cathode by the air compressor.

7. The method of claim 6, wherein after activating the resume function, the method further comprises:

inquiring a fourth mapping relation according to the battery performance loss and the corresponding target voltage to obtain a target recovery time length, wherein the target recovery time length is a recovery time length corresponding to the battery performance loss and the corresponding target voltage, the recovery time length is the maximum duration action time length of the recovery function, and the fourth mapping relation is a mapping relation of the battery performance loss, the target voltage and the recovery time length;

And acquiring a recovery duration, and closing the recovery function under the condition that the recovery duration is longer than or equal to the target recovery duration, wherein the recovery duration is the duration of action after the recovery function is activated.

8. A performance recovery apparatus for a fuel cell, the apparatus comprising:

a first obtaining unit, configured to obtain a target identifier, and obtain a target vehicle speed when the target identifier is in an engine running state and a recovery accumulated time length is greater than a first threshold value and/or a battery performance loss is greater than a second threshold value, where the target identifier is used to characterize whether the engine is in the running state, the target vehicle speed is a running speed at a current time of a vehicle, the recovery accumulated time length is an accumulated time from a time point when a fuel cell performs performance recovery last time to the current time point, and the battery performance loss is a percentage of a decrease between an average value of an output voltage of a battery cell in the fuel cell at the current time point and an average value of the output voltage of the battery cell in the fuel cell at a target time point, and the target time point is a preset time length before the current time point and spaced from the current time point;

A second obtaining unit configured to obtain a target reserve and a target electric quantity when the target vehicle speed is 0, and activate a recovery function when the target reserve is greater than a third threshold and the target electric quantity is less than a fourth threshold and greater than a fifth threshold, the target reserve being a remaining amount of hydrogen in the fuel cell, the target electric quantity being a remaining amount of the power cell, the recovery function being configured to recover performance of the fuel cell by causing the fuel cell cathode to be in an underinflated state, and reducing an oxide layer on a cathode catalyst surface;

and a third obtaining unit configured to obtain the target electric quantity and the target reserve capacity when the target vehicle speed is not 0, and activate the recovery function when the target electric quantity is greater than a sixth threshold and the target reserve capacity is greater than the third threshold.

9. A computer readable storage medium, characterized in that the computer readable storage medium comprises a stored program, wherein the program, when run, controls a device in which the computer readable storage medium is located to perform the method of any one of claims 1 to 7.

10. A vehicle, characterized by comprising: one or more processors, memory, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs comprising instructions for performing the method of any of claims 1-7.