Method and device for controlling shutdown purging of fuel cell, electronic equipment and vehicle

Abstract

The invention relates to a method and device for controlling shutdown purging of a fuel cell, electronic equipment and a vehicle, and relates to the field of hydrogen fuel cell vehicles, and the method comprises the steps: when the vehicle receives a shutdown instruction, obtaining the rechargeable power of a power cell of the vehicle, the remaining capacity of the power cell and the environmental data of the fuel cell in real time, the environment data comprises one or more of the environment temperature, the electric pile temperature and the electric pile humidity of the fuel cell; determining shutdown purging power and target shutdown purging time of the fuel cell based on one or more of the rechargeable power of the power cell, the remaining capacity of the power cell and the environmental data; and performing purging operation on the fuel cell according to the shutdown purging power and the target shutdown purging time. The method can avoid pile flooding or membrane over-drying caused by insufficient shutdown purging of the fuel cell, and can avoid overcharge of the power cell caused by large operation power or overlong operation time.

Description

Technical Field

[0001] The present disclosure relates to the field of hydrogen fuel cell vehicles, and in particular, to a method, device, electronic device, and vehicle for controlling the shutdown purge of a fuel cell. Background Art

[0002] Fuel cell vehicles among new energy vehicles have prominent advantages such as high energy conversion efficiency, good fuel economy, low noise, zero pollutants, zero emissions, and wide sources of hydrogen. Currently, fuel cells are in a stage of rapid development. In actual use, insufficient shutdown purge of the fuel cell easily leads to situations such as flooding of the stack and excessive dryness of the membrane. If the operating power is large or the operating time is long, it will also cause the problem of overcharging of the power battery, thereby damaging the life of the stack and the power battery, which is a technical problem that needs to be solved urgently at present. Summary of the Invention

[0003] To overcome the problems existing in the related art, the present disclosure provides a method, device, electronic device, and vehicle for controlling the shutdown purge of a fuel cell.

[0004] According to a first aspect of an embodiment of the present disclosure, a method for controlling the shutdown purge of a fuel cell is provided, including: When the vehicle receives a shutdown instruction, the rechargeable power of the vehicle's power battery, the remaining power of the power battery, and the environmental data of the fuel cell are obtained in real time, where the environmental data includes one or more of the environmental temperature, stack temperature, and stack humidity of the fuel cell; Based on one or more of the rechargeable power of the power battery, the remaining power of the power battery, and the environmental data, the shutdown purge power and the target shutdown purge time of the fuel cell are determined; The fuel cell is purged according to the shutdown purge power and the target shutdown purge time.

[0005] Optionally, the determining the shutdown purge power and the target shutdown purge time of the fuel cell based on one or more of the rechargeable power of the power battery, the remaining power of the power battery, and the environmental data includes: The shutdown purge power is determined according to at least one of the rechargeable power of the power battery, the environmental temperature, the stack temperature, and the stack humidity; The target shutdown purge time is determined according to the remaining power of the power battery and the shutdown purge power.

[0006] Optionally, the determining the target shutdown purge time according to the remaining power of the power battery and the shutdown purge power includes: Determine the maximum shutdown purge time of the fuel cell according to at least one of the ambient temperature, the stack temperature, the stack humidity, and the shutdown purge power; Determine the maximum rechargeable time of the power battery according to the remaining power of the power battery and the shutdown purge power; Determine the target shutdown purge time according to the maximum shutdown purge time and the maximum rechargeable time.

[0007] Optionally, the determining the target shutdown purge time according to the maximum shutdown purge time and the maximum rechargeable time includes: Take the minimum value of the maximum shutdown purge time and the maximum rechargeable time as the target shutdown purge time.

[0008] Optionally, the purging the fuel cell according to the shutdown purge power and the target shutdown purge time includes: When the stack temperature of the fuel cell is not equal to the preset shutdown purge target temperature, control the fuel cell to vaporize the liquid in the fuel cell at the shutdown purge power; When the stack temperature is equal to the preset shutdown purge target temperature, or the cumulative operation duration of the fuel cell running at the shutdown purge power is greater than the first preset duration, control the fuel cell to purge the vaporized liquid at the shutdown purge power; wherein, the first preset duration is less than the target shutdown purge time; When the preset condition is satisfied, control the fuel cell to reduce the load to zero power output to stop the purging operation.

[0009] Optionally, the preset condition includes any one of the following conditions: The cumulative operation duration of the fuel cell running at the shutdown purge power is greater than or equal to the target shutdown purge time; The AC impedance value of the stack of the fuel cell is greater than or equal to the target AC impedance value; The shutdown purge power is greater than or equal to the rechargeable power of the power battery.

[0010] Optionally, the controlling the fuel cell to reduce the load to zero power output to stop the purging operation includes: Control the fuel cell to reduce the load at a set load reduction rate; When the fuel cell is reduced to zero power output, detect the hydrogen end pressure and the air end pressure of the fuel cell; When the hydrogen end pressure and the air end pressure of the fuel cell are in an equilibrium state, control the fuel cell to shut down to stop the purging operation.

[0011] According to a second aspect of the embodiments of the present disclosure, a device for controlling the shutdown purge of a fuel cell is provided, including: An acquisition module, configured to, when the vehicle receives a shutdown instruction, acquire in real time the rechargeable power of the vehicle's power battery, the remaining power of the power battery, the vehicle position altitude, and the environmental data of the fuel cell, where the environmental data includes one or more of the environmental temperature, the stack temperature, and the stack humidity of the fuel cell; A determination module, configured to determine the shutdown purge power and the target shutdown purge time of the fuel cell based on one or more of the rechargeable power of the power battery, the remaining power of the power battery, and the environmental data; A control module, configured to perform a purge operation on the fuel cell according to the shutdown purge power and the target shutdown purge time.

[0012] According to a third aspect of the embodiments of the present disclosure, an electronic device is provided, including: A memory, on which a computer program is stored; A processor, configured to execute the computer program in the memory to implement the steps of the method for controlling the shutdown purge of the fuel cell according to the first aspect of the embodiments of the present disclosure.

[0013] According to a fourth aspect of the embodiments of the present disclosure, a vehicle is provided, including: the electronic device according to the third aspect of the embodiments of the present disclosure.

[0014] In the above technical solution, when the vehicle receives a shutdown instruction, the rechargeable power of the vehicle's power battery, the remaining power of the power battery, and the environmental data of the fuel cell are acquired in real time, where the environmental data includes one or more of the environmental temperature, the stack temperature, and the stack humidity of the fuel cell; the shutdown purge power and the target shutdown purge time of the fuel cell are determined based on one or more of the rechargeable power of the power battery, the remaining power of the power battery, and the environmental data; and a purge operation is performed on the fuel cell according to the shutdown purge power and the target shutdown purge time. Through the above technical solution, a sufficient purge operation can be performed on the fuel cell, which can avoid the stack waterlogging or membrane over-drying caused by insufficient shutdown purge of the fuel cell, and at the same time avoid overcharging of the power battery caused by the large operating power or long operating time of the fuel cell.

[0015] Other features and advantages of the present disclosure will be described in detail in the subsequent specific implementation part. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings are used to provide a further understanding of the present disclosure, and constitute a part of the specification, and are used to explain the present disclosure together with the following specific implementation, but do not constitute a limitation to the present disclosure. In the drawings: Figure 1 It is a flowchart of a method for controlling fuel cell shutdown purge shown according to an exemplary embodiment.

[0017] Figure 2 It is a flowchart of another method for controlling fuel cell shutdown purge shown according to an exemplary embodiment.

[0018] Figure 3 It is a flowchart of another method for controlling fuel cell shutdown purge shown according to an exemplary embodiment.

[0019] Figure 4 It is a flowchart of yet another method for controlling fuel cell shutdown purge shown according to an exemplary embodiment.

[0020] Figure 5 It is a flowchart of yet another method for controlling fuel cell shutdown purge shown according to an exemplary embodiment.

[0021] Figure 6 It is a block diagram of a device 600 for controlling fuel cell shutdown purge shown according to an exemplary embodiment.

[0022] Figure 7 It is a block diagram of an electronic device 700 shown according to an exemplary embodiment. Detailed implementation

[0023] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0024] It can be understood that although the operations are described in a specific order in the drawings in the embodiments of the present disclosure, it should not be construed as requiring the operations to be performed in the specific order shown or in a serial order, or requiring all the operations shown to obtain the desired result. In a specific environment, multitasking and parallel processing may be advantageous.

[0025] It should be noted that all actions of obtaining signals, information, or data in the present disclosure are carried out on the premise of complying with the corresponding data protection regulations and policies of the country where the location is located and obtaining the authorization given by the owner of the corresponding device.

[0026] The electrification of automotive power sources fundamentally breaks away from the dependence on fossil fuels, which is of decisive significance for alleviating the energy crisis and air pollution caused by the overuse of fossil fuels. Among new energy vehicles, fuel cell vehicles have prominent advantages such as high energy conversion efficiency, good fuel economy, low noise, zero pollutants, zero emissions, and a wide range of hydrogen sources. Currently, fuel cells have been widely used in commercial vehicles due to their advantages such as long endurance and environmental friendliness. Fuel cell technology is in a stage of rapid development. However, there are still many problems in the actual use process. Especially during the shutdown purge process, insufficient purging is likely to cause situations such as flooding of the fuel cell stack, excessive dryness of the membrane, and overcharging, which will damage the fuel cell stack and the service life of the power battery. The applicant proposes a method for controlling the shutdown purge of fuel cells. Based on the rechargeable power of the power battery, the remaining power of the power battery, and the environmental data of the fuel cell, the shutdown purge power and the target shutdown purge time of the fuel cell are determined, so as to control the fuel cell to perform a purge operation through the shutdown purge power and the target shutdown purge time. This can avoid the problems of flooding of the fuel cell stack or excessive dryness of the membrane caused by insufficient shutdown purge of the fuel cell, and at the same time avoid the problem of overcharging of the power battery caused by the large operating power or long operating time of the fuel cell. The method for controlling the shutdown purge of the fuel cell provided by the present disclosure will be described below.

[0027] Figure 1 is a flowchart of a method for controlling the shutdown purge of a fuel cell shown according to an exemplary embodiment, as Figure 1 shown, the method includes: In step S11, when the vehicle receives a shutdown instruction, the rechargeable power of the vehicle's power battery, the remaining power of the power battery, the vehicle position height, and the environmental data of the fuel cell are obtained in real time. The environmental data includes one or more of the environmental temperature, the stack temperature, and the stack humidity of the fuel cell.

[0028] In step S12, based on one or more of the rechargeable power of the power battery, the remaining power of the power battery, and the environmental data, the shutdown purge power and the target shutdown purge time of the fuel cell are determined.

[0029] In step S13, the fuel cell is purged according to the shutdown purge power and the target shutdown purge time.

[0030] Exemplarily, when the fuel cell vehicle is powered on and off and the vehicle is under high voltage, the vehicle's VCU (Vehicle Control Unit) determines the EV (Electric Vehicle) switch state. When the EV switch of the vehicle is in the EV mode, the fuel cell vehicle is in the pure electric mode. When the EV switch of the vehicle is in the FCV (Fuel Cell Vehicles) mode, the fuel cell vehicle is in the hybrid mode, and the fuel cell starts to start. According to the target power sent by the VCU to the FCU (Fuel-cell Control Unit), the fuel cell power is self-regulated and output externally to jump to the working state. When the FCU receives the shutdown instruction from the VCU, the fuel cell starts to execute the shutdown purge strategy. At this time, the vehicle can obtain power battery related parameters such as the rechargeable power of the power battery and the remaining power of the power battery through the VCU and feedback the parameters to the FCU; and can obtain the environmental data of the fuel cell of the vehicle through the FCU. The environmental data may include one or more of the environmental temperature, stack temperature, and stack humidity of the fuel cell. The FCU of the vehicle can determine the shutdown purge power and the target shutdown purge time of the fuel cell based on one or more of the obtained environmental data of the fuel cell, the rechargeable power of the power battery, and the remaining power of the power battery, so as to control the fuel cell to perform the purge operation within the target shutdown purge time through the shutdown purge power. In addition, as the vehicle position height increases, the environmental temperature usually decreases and the air pressure also decreases. Therefore, in a low temperature environment, the moisture inside the fuel cell is more likely to freeze, which may increase the purge difficulty and the required purge time, and the lower air pressure will affect the flow rate and flow of the purge gas, thereby affecting the purge efficiency. Therefore, when determining the shutdown purge power and the target shutdown purge time of the fuel cell based on one or more of the obtained environmental data of the fuel cell, the rechargeable power of the power battery, and the remaining power of the power battery, the influence of the vehicle position height on the shutdown purge power and the target shutdown purge time can be considered simultaneously (that is, the shutdown purge power and the target shutdown purge time of the fuel cell are determined based on one or more of the vehicle position height, the environmental data of the fuel cell, the rechargeable power of the power battery, and the remaining power of the power battery).

[0031] Through the above technical solution, it is possible to determine the shutdown purge power and the target shutdown purge time of the fuel cell based on one or more of the obtained environmental data of the fuel cell, the rechargeable power of the power battery, and the remaining power of the power battery, so as to control the fuel cell to perform the purge operation through the shutdown purge power and the target shutdown purge time, which can avoid the stack flooding or membrane over-drying caused by insufficient shutdown purge of the fuel cell, and at the same time avoid overcharging of the power battery caused by the large operating power or long operating time of the fuel cell.

[0032] Figure 2 is a flowchart of another method for controlling the shutdown purge of a fuel cell shown according to an exemplary embodiment, as Figure 2 shown. In step S12, it includes: In step S121, determine the shutdown purge power according to at least one of the rechargeable power of the power battery, the ambient temperature, the stack temperature, and the stack humidity.

[0033] In step S122, determine the target shutdown purge time according to the remaining power of the power battery and the shutdown purge power.

[0034] Exemplarily, the fuel cell still has a certain power generation power during the shutdown purge process. When the shutdown purge time and / or the shutdown purge power are set too large, it may cause over-purging of the fuel cell, resulting in over-drying of the proton exchange membrane of the fuel cell, thereby affecting the stack life, and the electrical energy generated by the fuel cell during the purge process exceeds the remaining capacity of the power battery, thus causing overcharging of the power battery and affecting the power battery life; while when the shutdown purge time and / or the shutdown purge power are set too small, it may cause insufficient purging of the fuel cell, resulting in flooding of the fuel cell stack and affecting the stack life. In summary, when performing the fuel cell purge operation, it is necessary to determine a reasonable shutdown purge power and a target shutdown purge time.

[0035] The shutdown purge power of the fuel cell should generally be less than the rechargeable power of the power battery, and the shutdown purge power is affected by the ambient temperature, the stack temperature, and the stack humidity of the fuel cell. Therefore, the shutdown purge power of the fuel cell can be determined according to at least one of the rechargeable power of the power battery, the ambient temperature, the stack temperature, and the stack humidity. The present disclosure does not limit the specific scheme for determining the shutdown purge power. It can be understood that, in the case of determining the shutdown purge power, the target shutdown purge time can be determined according to the remaining power of the power battery.

[0036] Figure 3 is a flowchart of another method for controlling the shutdown purge of a fuel cell shown according to an exemplary embodiment, as Figure 3 shown. In step S122, it includes: In step S1221, determine the maximum shutdown purge time of the fuel cell according to at least one of the ambient temperature, the stack temperature, the stack humidity, and the shutdown purge power.

[0037] In step S1222, determine the maximum rechargeable time of the power battery according to the remaining power of the power battery and the shutdown purge power.

[0038] In step S1223, determine the target shutdown purge time according to the maximum shutdown purge time and the maximum rechargeable time.

[0039] Exemplarily, without considering overcharging of the power battery, the maximum shutdown purge time can be determined according to the shutdown purge power and at least one of the ambient temperature, the stack temperature, and the stack humidity. For example, in the vehicle system, preset the maximum shutdown purge time for each shutdown purge power at different stack temperatures or different stack temperature ranges; when considering overcharging of the power battery, the maximum rechargeable time of the power battery can be determined according to the remaining power of the power battery and the shutdown purge power. Therefore, when the maximum shutdown purge time is used as the target shutdown purge time, there may be a situation where the fuel cell operates for too long and the power battery is overcharged; when the maximum rechargeable time is used as the target shutdown purge time, there may be a situation where the proton exchange membrane of the stack is too dry due to too long a purge time; in summary, the target shutdown purge time can be determined according to the maximum shutdown purge time and the maximum rechargeable time. For example, the average value of the maximum shutdown purge time and the maximum rechargeable time can be used as the target shutdown purge time.

[0040] Alternatively, optionally, use the minimum value of the maximum shutdown purge time and the maximum rechargeable time as the target shutdown purge time.

[0041] Among them, the maximum rechargeable time can be expressed as:

[0042]

[0043] Among them, is the maximum rechargeable energy of the power battery, is the shutdown purge power, is the rated capacity of the power battery, is the state of charge (SOC) value of the remaining power of the power battery, is the maximum available SOC value of the power battery.

[0044] Figure 4 is a flowchart showing another method for controlling the shutdown purge of a fuel cell according to an exemplary embodiment. As Figure 4 shown, in step S13, it includes: In step S131, when the stack temperature of the fuel cell is not equal to the preset shutdown purge target temperature, control the fuel cell to vaporize the liquid in the fuel cell at the shutdown purge power.

[0045] Exemplarily, when the fuel cell performs a purge operation at the shutdown purge power, if the purge is performed when the stack temperature is relatively low, the liquid water generated by the electrochemical reaction may block the flow channels and the purge may not be clean, resulting in a flooding situation. If the ambient temperature is too low, it may also cause the engine to freeze. When the stack temperature is too high, purging may blow the proton exchange membrane drier, affecting the stack life. Therefore, when the fuel cell performs a shutdown purge operation, in the first stage of the purge operation, the fuel cell stack temperature can be controlled to reach a preset shutdown purge target temperature to vaporize the liquid in the stack.

[0046] In step S132, when the stack temperature is equal to the preset shutdown purge target temperature, or the cumulative operating duration of the fuel cell operating at the shutdown purge power is greater than a first preset duration, control the fuel cell to purge the vaporized liquid at the shutdown purge power; wherein, the first preset duration is less than the target shutdown purge time.

[0047] Exemplarily, when the stack temperature is equal to the preset shutdown purge target temperature, enter the second stage of the purge operation. At this time, the fuel cell can perform a purge operation on the vaporized liquid at the shutdown purge power to blow out the vaporized liquid from the fuel cell. In addition, to avoid the situation that the time for the stack temperature to reach the preset shutdown purge target temperature is too long, resulting in too short a purge time for the vaporized liquid and insufficient purging, the first preset duration can be set as the maximum value of the time used for the stack temperature to reach the preset shutdown purge target temperature. That is, when the stack temperature is equal to the preset shutdown purge target temperature, or the cumulative operating duration of the fuel cell operating at the shutdown purge power is greater than the first preset duration, enter the second stage of the purge operation, wherein the first preset duration is less than the target shutdown purge time. In addition, it can be understood that after entering the second stage of the purge operation, it is necessary to maintain the stack temperature equal to the preset shutdown purge target temperature.

[0048] In step S133, when a preset condition is satisfied, control the fuel cell to reduce the load to zero power output to stop the purge operation.

[0049] Optionally, the preset condition includes any one of the following conditions: The cumulative operating duration of the fuel cell operating at the shutdown purge power is greater than or equal to the target shutdown purge time; The AC impedance value of the fuel cell stack is greater than or equal to the target AC impedance value; The shutdown purge power is greater than or equal to the rechargeable power of the power battery.

[0050] Exemplarily, when the cumulative operation duration of the fuel cell operating at the shutdown purge power is greater than or equal to the target shutdown purge time, in order to avoid over-drying of the proton exchange membrane of the fuel cell or overcharging of the power battery, the fuel cell can be controlled to reduce its load to zero power output to stop the purge operation.

[0051] When the shutdown purge power is greater than or equal to the rechargeable power of the power battery, it may cause overcharging of the power battery, or the power battery cannot fully absorb the energy generated by the fuel cell, resulting in energy waste. Therefore, when the shutdown purge power is greater than or equal to the rechargeable power of the power battery, the fuel cell can be controlled to reduce its load to zero power output to stop the purge operation.

[0052] The AC impedance value of the fuel cell stack can be used to reflect the water content in the stack. When the water content in the stack increases, the proton conductivity of the proton exchange membrane (such as Nafion membrane) will increase, resulting in a decrease in the AC impedance value; conversely, when the water content in the stack decreases, the proton conductivity of the proton exchange membrane decreases, and the AC impedance value increases. A target AC impedance value can be set to represent the standard water content of the fuel cell stack. Therefore, when the AC impedance value of the fuel cell stack is greater than or equal to the target AC impedance value, it can be indicated that the water content of the fuel cell stack has reached the target water content, and the fuel cell can be controlled to reduce its load to zero power output to stop the purge operation.

[0053] Figure 5 is a flowchart of another method for controlling the shutdown purge of a fuel cell shown according to an exemplary embodiment, as Figure 5 shown, in this step S133, it includes: In step S1331, control the fuel cell to reduce its load at a set load reduction rate.

[0054] In step S1332, when the fuel cell reduces its load to zero power output, detect the hydrogen end pressure and the air end pressure of the fuel cell.

[0055] In step S1333, when the hydrogen end pressure and the air end pressure of the fuel cell are in an equilibrium state, control the fuel cell to shut down to stop the purge operation.

[0056] Exemplarily, when preset conditions are met, the fuel cell can be controlled to reduce its load at a set load reduction power. When the fuel cell is reduced to zero power output, the hydrogen end pressure and the air end pressure of the fuel cell are detected. If the pressures do not reach the equilibrium pressure, a pressure regulation operation is performed to make the hydrogen end pressure and the air end pressure of the fuel cell in an equilibrium state. When the hydrogen end pressure and the air end pressure of the fuel cell are in an equilibrium state, the fuel cell is controlled to shut down, which can prevent the occurrence of hydrogen-air interface phenomenon inside the stack and damage the stack performance.

[0057] In the above technical solution, when the vehicle receives a shutdown instruction, the rechargeable power of the vehicle's power battery, the remaining power of the power battery, and the environmental data of the fuel cell are obtained in real time. The environmental data includes one or more of the environmental temperature, stack temperature, and stack humidity of the fuel cell; based on one or more of the rechargeable power of the power battery, the remaining power of the power battery, and the environmental data, the shutdown purge power and the target shutdown purge time of the fuel cell are determined; the fuel cell is purged according to the shutdown purge power and the target shutdown purge time. Through the above technical solution, a sufficient purge operation can be performed on the fuel cell, which can avoid stack flooding or membrane over-drying caused by insufficient shutdown purge of the fuel cell, and at the same time avoid overcharging of the power battery caused by the large operating power or long operating time of the fuel cell.

[0058] Figure 6 is a block diagram of a device 600 for controlling the shutdown purge of a fuel cell shown according to an exemplary embodiment, as Figure 6 shown, the device 600 for controlling the shutdown purge of the fuel cell includes: an acquisition module 601, a determination module 602, and a control module 603; The acquisition module 601 is configured to, when the vehicle receives a shutdown instruction, obtain in real time the rechargeable power of the vehicle's power battery, the remaining power of the power battery, the vehicle position height, and the environmental data of the fuel cell. The environmental data includes one or more of the environmental temperature, stack temperature, and stack humidity of the fuel cell; The determination module 602 is configured to determine the shutdown purge power and the target shutdown purge time of the fuel cell based on one or more of the rechargeable power of the power battery, the remaining power of the power battery, and the environmental data; The control module 603 is configured to perform a purge operation on the fuel cell according to the shutdown purge power and the target shutdown purge time.

[0059] Optionally, the determination module 602 includes: a power determination sub-module and a time determination sub-module; The power determination sub-module is used to determine the shutdown purge power according to at least one of the rechargeable power of the power battery, the ambient temperature, the stack temperature, and the stack humidity; The time determination sub-module is used to determine the target shutdown purge time according to the remaining power of the power battery and the shutdown purge power; Optionally, the time determination sub-module is further used to: Determine the maximum shutdown purge time of the fuel cell according to at least one of the ambient temperature, the stack temperature, the stack humidity, and the shutdown purge power; Determine the maximum rechargeable time of the power battery according to the remaining power of the power battery and the shutdown purge power; Determine the target shutdown purge time according to the maximum shutdown purge time and the maximum rechargeable time.

[0060] Optionally, the time determination sub-module is further used to take the minimum value of the maximum shutdown purge time and the maximum rechargeable time as the target shutdown purge time.

[0061] Optionally, the control module 603 is used to: When the stack temperature of the fuel cell is not equal to the preset shutdown purge target temperature, control the fuel cell to vaporize the liquid in the fuel cell at the shutdown purge power; When the stack temperature is equal to the preset shutdown purge target temperature, or the cumulative operating duration of the fuel cell operating at the shutdown purge power is greater than the first preset duration, control the fuel cell to purge the vaporized liquid at the shutdown purge power; wherein, the first preset duration is less than the target shutdown purge time; When the preset condition is met, control the fuel cell to reduce the load to zero power output to stop the purge operation.

[0062] Optionally, the preset condition includes any one of the following conditions: The cumulative operating duration of the fuel cell operating at the shutdown purge power is greater than or equal to the target shutdown purge time; The AC impedance value of the stack of the fuel cell is greater than or equal to the target AC impedance value; The shutdown purge power is greater than or equal to the rechargeable power of the power battery.

[0063] Optionally, the control module 603 is further used to: Control the fuel cell to reduce the load at a set load reduction rate; When the fuel cell reduces the load to zero power output, detect the hydrogen end pressure and the air end pressure of the fuel cell; When the pressure at the hydrogen end of the fuel cell is in equilibrium with the pressure at the air end of the fuel cell, control the fuel cell to shut down to stop the purging operation.

[0064] In the above technical solution, when the vehicle receives a shutdown instruction, the rechargeable power of the vehicle's power battery, the remaining power of the power battery, and the environmental data of the fuel cell are obtained in real time. The environmental data includes one or more of the environmental temperature, stack temperature, and stack humidity of the fuel cell; based on one or more of the rechargeable power of the power battery, the remaining power of the power battery, and the environmental data, determine the shutdown purge power and the target shutdown purge time of the fuel cell; perform a purge operation on the fuel cell according to the shutdown purge power and the target shutdown purge time. Through the above technical solution, a sufficient purge operation can be performed on the fuel cell, which can avoid flooding of the stack or excessive dryness of the membrane caused by insufficient shutdown purging of the fuel cell, and at the same time avoid overcharging of the power battery caused by a large operating power or a long operating time of the fuel cell.

[0065] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment related to the method, and will not be elaborated here.

[0066] Figure 7 is a block diagram of an electronic device 700 shown according to an exemplary embodiment. As Figure 7 shown, the electronic device 700 may include: a processor 701, a memory 702. The electronic device 700 may further include one or more of a multimedia component 703, an input / output (I / O) interface 704, and a communication component 705.

[0067] Among them, the processor 701 is used to control the overall operation of the electronic device 700 to complete all or part of the steps in the above method for controlling the shutdown and purging of the fuel cell. The memory 702 is used to store various types of data to support the operation of the electronic device 700. These data may include, for example, instructions for any application or method operating on the electronic device 700, as well as application-related data, such as contact data, messages sent and received, pictures, audio, video, and so on. The memory 702 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (ROM), magnetic memory, flash memory, a magnetic disk, or an optical disc. The multimedia component 703 may include a screen and an audio component. The screen can be, for example, a touch screen, and the audio component is used to output and / or input audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signal can be further stored in the memory 702 or sent through the communication component 705. The audio component also includes at least one speaker for outputting audio signals. The I / O interface 704 provides an interface between the processor 701 and other interface modules, and the above other interface modules can be a keyboard, a mouse, buttons, etc. These buttons can be virtual buttons or physical buttons. The communication component 705 is used for wired or wireless communication between the electronic device 700 and other devices. Wireless communication, such as Wi-Fi, Bluetooth, Near Field Communication (NFC), 2G, 3G, or 4G, or a combination of one or more of them. Accordingly, the communication component 705 may include: a Wi-Fi module, a Bluetooth module, and an NFC module.

[0068] In an exemplary embodiment, the electronic device 700 may be implemented by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors or other electronic components, and is used to execute the above method for controlling the shutdown and purge of the fuel cell.

[0069] In another exemplary embodiment, a computer-readable storage medium including program instructions is further provided. When the program instructions are executed by a processor, the steps of the above method for controlling the shutdown and purge of the fuel cell are implemented. For example, the computer-readable storage medium may be the above-mentioned memory 702 including program instructions, and the above program instructions may be executed by the processor 701 of the electronic device 700 to complete the above method for controlling the shutdown and purge of the fuel cell.

[0070] In another exemplary embodiment, a vehicle is further provided, and the vehicle includes the electronic device 700 described in the above embodiment.

[0071] In another exemplary embodiment, a computer program product is further provided. The computer program product includes a computer program that can be executed by a processor. When the computer program is executed by the processor, the steps of the above method for controlling the shutdown and purge of the fuel cell are implemented.

[0072] The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings. However, the present disclosure is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0073] In addition, it should be noted that, in the above specific embodiments, the various specific technical features described can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the present disclosure will not separately describe various possible combination methods.

[0074] Furthermore, any combination can be made between various different embodiments of the present disclosure as long as it does not violate the idea of the present disclosure, and it should also be regarded as the content disclosed by the present disclosure.

Claims

1. A method for controlling the shutdown purge of a fuel cell, characterized in that, Including: When the vehicle receives a shutdown instruction, it obtains in real time the rechargeable power of the vehicle's power battery, the remaining power of the power battery, and the environmental data of the fuel cell. The environmental data includes one or more of the environmental temperature, stack temperature, and stack humidity of the fuel cell; Determine the shutdown purge power and the target shutdown purge time of the fuel cell based on one or more of the rechargeable power of the power battery, the remaining power of the power battery, and the environmental data; Perform a purge operation on the fuel cell according to the shutdown purge power and the target shutdown purge time.

2. The method according to claim 1, wherein The determining the shutdown purge power and the target shutdown purge time of the fuel cell based on one or more of the rechargeable power of the power battery, the remaining power of the power battery, and the environmental data includes: Determine the shutdown purge power according to at least one of the rechargeable power of the power battery, the environmental temperature, the stack temperature, and the stack humidity; Determine the target shutdown purge time according to the remaining power of the power battery and the shutdown purge power.

3. The method according to claim 2, wherein The determining the target shutdown purge time according to the remaining power of the power battery and the shutdown purge power includes: Determine the maximum shutdown purge time of the fuel cell according to at least one of the environmental temperature, the stack temperature, the stack humidity, and the shutdown purge power; Determine the maximum rechargeable time of the power battery according to the remaining power of the power battery and the shutdown purge power; Determine the target shutdown purge time according to the maximum shutdown purge time and the maximum rechargeable time.

4. The method according to claim 3, wherein The determining the target shutdown purge time according to the maximum shutdown purge time and the maximum rechargeable time includes: Take the minimum value of the maximum shutdown purge time and the maximum rechargeable time as the target shutdown purge time.

5. The method according to claim 1, characterized in that, The performing a purge operation on the fuel cell according to the shutdown purge power and the target shutdown purge time includes: When the stack temperature of the fuel cell is not equal to the preset shutdown purge target temperature, control the fuel cell to vaporize the liquid in the fuel cell at the shutdown purge power; When the stack temperature is equal to the preset shutdown purge target temperature, or the cumulative operation duration of the fuel cell running at the shutdown purge power is greater than a first preset duration, control the fuel cell to purge the vaporized liquid at the shutdown purge power; where the first preset duration is less than the target shutdown purge time; When a preset condition is met, control the fuel cell to reduce the load to zero power output to stop the purge operation.

6. The method according to claim 5, wherein The preset condition includes any one of the following conditions: The cumulative operation duration of the fuel cell running at the shutdown purge power is greater than or equal to the target shutdown purge time; The stack AC impedance value of the fuel cell is greater than or equal to the target AC impedance value; The shutdown purge power is greater than or equal to the rechargeable power of the power battery.

7. The method according to claim 5, wherein The controlling the fuel cell to reduce the load to zero power output to stop the purge operation includes: Control the fuel cell to reduce the load at a set load reduction rate; When the fuel cell is downscaled to zero power output, detect the hydrogen terminal pressure of the fuel cell and the air terminal pressure of the fuel cell; When the hydrogen terminal pressure of the fuel cell and the air terminal pressure of the fuel cell are in an equilibrium state, control the fuel cell to shut down to stop the purging operation.

8. A device for controlling the shutdown purge of a fuel cell, characterized in that, Comprising: An acquisition module, configured to, when the vehicle receives a shutdown instruction, acquire in real time the rechargeable power of the vehicle's power battery, the remaining power of the power battery, the vehicle position altitude, and the environmental data of the fuel cell, where the environmental data includes one or more of the environmental temperature of the fuel cell, the stack temperature, and the stack humidity; A determination module, configured to determine the shutdown purge power and the target shutdown purge time of the fuel cell based on one or more of the rechargeable power of the power battery, the remaining power of the power battery, and the environmental data; A control module, configured to perform a purging operation on the fuel cell according to the shutdown purge power and the target shutdown purge time.

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

10. A vehicle, characterized in that, Comprising: The electronic device according to claim 9.

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