Fuel cell system control method, device, equipment and medium

Abstract

The invention discloses a fuel cell system control method, a fuel cell system control device, fuel cell system control equipment and a medium, which are applied to the technical field of fuel cells. A heat dissipation loop in a cooling system in the fuel cell system is controlled to be opened, so that a heat transfer loop passing through a heat transfer water jacket of a hydrogen circulating pump in an anode system in the fuel cell system is communicated with the heat dissipation loop, and the heat dissipation loop is controlled to cool cooling liquid in the heat transfer loop according to the current hydrogen temperature flowing into the hydrogen circulating pump; the temperature difference between the current cooling liquid temperature flowing through the heat transfer water jacket and the current hydrogen temperature flowing into the hydrogen circulating pump is reduced to a target range, so that the problem that the hydrogen circulating pump is frozen after heat shutdown can be effectively solved, and the fuel cell system can be smoothly started in a low-temperature environment; and thus, the cold start performance of the fuel cell system can be improved.

Description

Technical Field

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

[0002] In fuel cell systems, low-temperature starting performance is a very important indicator. Under low-temperature conditions, the fuel cell system is limited by the system architecture and product performance, and during the cold start process, the system often fails to start due to internal icing. Summary of the Invention

[0003] This application provides a fuel cell system control method, device, equipment, and medium to address the problem in the prior art of fuel cell systems frequently failing to start due to internal icing during cold start. Specifically, the technical solutions provided by this application are as follows:

[0004] In one aspect, the present application provides a fuel cell system control method, comprising:

[0005] During thermal shutdown of the fuel cell system, controlling to open a heat dissipation circuit in a cooling system of the fuel cell system so that a heat transfer circuit through a heat transfer water jacket of a hydrogen circulation pump in an anode system of the fuel cell system is connected to the heat dissipation circuit;

[0006] According to the current temperature of the hydrogen flowing into the hydrogen circulation pump, the heat dissipation circuit is controlled to cool the coolant in the heat transfer circuit so that the temperature difference between the current temperature of the coolant flowing through the heat transfer water jacket and the current temperature of the hydrogen flowing into the hydrogen circulation pump is reduced to a target range.

[0007] In one possible embodiment, according to the current temperature of hydrogen flowing into the hydrogen circulation pump, the heat dissipation circuit is controlled to cool the coolant in the heat transfer circuit so that the temperature difference between the current temperature of the coolant flowing through the heat transfer water jacket and the current temperature of the hydrogen flowing into the hydrogen circulation pump is reduced to a target range, including:

[0008] determining target operating parameters corresponding to a current hydrogen temperature and a current coolant temperature;

[0009] According to the target operating parameters, the heat dissipation circuit operation is controlled so that the temperature difference between the current coolant temperature flowing through the heat transfer water jacket and the current hydrogen temperature flowing into the hydrogen circulation pump is reduced to a target range.

[0010] In one possible implementation, the target operating parameters include a target fan speed and a target water pump speed; determining the target operating parameters corresponding to the current hydrogen temperature and the current coolant temperature includes:

[0011] Based on the pre-calibrated correspondence between the fan speed of the cooling fan in the cooling circuit, the hydrogen temperature flowing into the hydrogen circulation pump, and the coolant temperature flowing through the heat transfer jacket, the fan speed corresponding to the current hydrogen temperature and the current coolant temperature is determined as the target fan speed of the cooling fan;

[0012] Based on the pre-calibrated correspondence between the water pump speed of the cooling water pump in the heat dissipation circuit, the hydrogen temperature flowing into the hydrogen circulation pump, and the coolant temperature flowing through the heat transfer jacket, the water pump speed corresponding to the current hydrogen temperature and the current coolant temperature is determined as the target water pump speed of the cooling water pump.

[0013] In one possible implementation, the target operating parameters include a target fan speed and a target water pump speed; determining the target operating parameters corresponding to the current hydrogen temperature and the current coolant temperature includes:

[0014] Obtaining a preset target fan speed of a cooling fan in a cooling circuit during a thermal shutdown process of the fuel cell system;

[0015] Based on the pre-calibrated correspondence between the water pump speed of the cooling water pump in the heat dissipation circuit under the condition of the target fan speed, the hydrogen temperature flowing into the hydrogen circulation pump, and the coolant temperature flowing through the heat transfer jacket, the water pump speed corresponding to the current hydrogen temperature and the current coolant temperature is determined as the target water pump speed of the cooling water pump.

[0016] In one possible implementation, the target operating parameters include a target fan speed and a target water pump speed; determining the target operating parameters corresponding to the current hydrogen temperature and the current coolant temperature includes:

[0017] Obtaining a preset target water pump speed of a cooling water pump in a heat dissipation circuit during a thermal shutdown of the fuel cell system;

[0018] Based on the pre-calibrated correspondence between the fan speed of the cooling fan in the cooling circuit under the condition of the target water pump speed, the hydrogen temperature flowing into the hydrogen circulation pump, and the coolant temperature flowing through the water transfer jacket, the fan speed corresponding to the current hydrogen temperature and the current coolant temperature is determined as the target fan speed of the cooling fan.

[0019] In one possible implementation, the target operating parameters include a target fan speed and a target water pump speed. Controlling the operation of the heat dissipation circuit according to the target operating parameters so that the temperature difference between the current coolant temperature flowing through the heat transfer water jacket and the current hydrogen temperature flowing into the hydrogen circulation pump is reduced to a target range includes:

[0020] The operation of the cooling fan in the cooling circuit is controlled based on the target fan speed, and the operation of the cooling water pump in the cooling circuit is controlled based on the target water pump speed, so as to reduce the temperature difference between the current coolant temperature flowing through the water transfer jacket and the current hydrogen temperature flowing into the hydrogen circulation pump through the cooling circuit to within a target range.

[0021] In one possible embodiment, according to the current temperature of hydrogen flowing into the hydrogen circulation pump, the heat dissipation circuit is controlled to cool the coolant in the heat transfer circuit so that the temperature difference between the current temperature of the coolant flowing through the heat transfer water jacket and the current temperature of the hydrogen flowing into the hydrogen circulation pump is reduced to a target range, further comprising:

[0022] Control and close the heat dissipation circuit in the cooling system of the fuel cell system.

[0023] On the other hand, the present application also provides a fuel cell system control device, comprising:

[0024] A circuit control unit, configured to control opening of a heat dissipation circuit in a cooling system of the fuel cell system during thermal shutdown of the fuel cell system so as to connect the heat transfer circuit through a heat transfer water jacket of a hydrogen circulation pump in an anode system of the fuel cell system to the heat dissipation circuit;

[0025] The temperature difference control unit is used to control the heat dissipation circuit to cool the coolant in the heat transfer circuit according to the current temperature of the hydrogen flowing into the hydrogen circulation pump, so that the temperature difference between the current temperature of the coolant flowing through the heat transfer water jacket and the current temperature of the hydrogen flowing into the hydrogen circulation pump is reduced to a target range.

[0026] On the other hand, the present application also provides a fuel cell control device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the above-mentioned fuel cell system control method is implemented.

[0027] On the other hand, the present application also provides a computer-readable storage medium, which stores computer instructions. When the computer instructions are executed by a processor, the above-mentioned fuel cell system control method is implemented.

[0028] The beneficial effects of this application are as follows:

[0029] The present application adds a heat transfer water jacket to the hydrogen circulation pump and adds a heat transfer circuit that passes through the heat transfer water jacket and is connected to the cooling system. During the thermal shutdown process of the fuel cell system, the heat transfer circuit and the heat dissipation circuit can be connected by opening the heat dissipation circuit in the cooling system, so that the coolant can be cooled by the heat dissipation circuit so that the cooled coolant circulates in the heat transfer circuit and the heat dissipation circuit, thereby achieving a rapid reduction in the temperature difference between the current coolant temperature flowing through the heat transfer water jacket and the current hydrogen temperature flowing into the hydrogen circulation pump, ensuring that the internal and external temperature difference of the hydrogen circulation pump is maintained within a small range after the fuel cell system is thermally shut down, thereby effectively avoiding the problem of increased condensation water inside the hydrogen circulation pump due to the large internal and external temperature difference of the hydrogen circulation pump, which in turn causes the hydrogen circulation pump to be easily frozen in a low-temperature environment, thereby ensuring that the fuel cell system can be started smoothly in a low-temperature environment, thereby improving the cold start performance of the fuel cell system.

[0030] Other features and advantages of the present application will be described in the following description, and in part will become apparent from the description or be understood by practicing the present application. The purposes and other advantages of the present application can be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0032] Figure 1 A schematic diagram of the structure of a fuel cell system in an embodiment of the present application;

[0033] Figure 2 A schematic flow chart of an overview of a fuel cell system control method according to an embodiment of the present application;

[0034] Figure 3 This is another schematic flow chart of an overview of the fuel cell system control method according to an embodiment of the present application;

[0035] Figure 4 This is a schematic diagram of a specific flow chart of a fuel cell system control method in an embodiment of the present application;

[0036] Figure 5 This is a functional structure diagram of a fuel cell system control device in an embodiment of the present application;

[0037] Figure 6 Schematic diagram of the hardware structure of the fuel cell control device in the embodiment of the present application. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and beneficial effects of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0039] In order to facilitate those skilled in the art to better understand this application, the technical terms involved in this application are briefly introduced below.

[0040] The heat dissipation circuit is a circuit in the cooling system of the fuel cell system used to dissipate heat from the coolant to cool the fuel cell stack and other related components. In this application, the heat dissipation circuit is composed of at least a cooling bypass valve, a cooling fan and a cooling water pump.

[0041] The heating circuit is a circuit in the cooling system of the fuel cell system used to heat the coolant to increase the temperature of the fuel cell stack and other related components. In this application, the heating circuit is composed of at least a cooling bypass valve, a heater and a cooling water pump.

[0042] The heat transfer circuit is a circuit used to heat or dissipate heat from the heat transfer water jacket disposed between the outer casing and the pump body of the hydrogen circulation pump through the temperature of the coolant in the cooling system. In this application, the heat transfer circuit is composed of at least the heat transfer water jacket.

[0043] The target operating parameters are parameters used to control the operation of the heat dissipation circuit. In this application, the target operating parameters include target fan speed and target water pump speed, etc.

[0044] After introducing the technical terms involved in this application, we will briefly introduce the application scenarios and design concepts of this application.

[0045] In order to solve the problem of fuel cell system being unable to start due to internal freezing in low temperature environments, special designs are usually added to the fuel cell system for improvement. For example, a heater is added between the cooling bypass valve and the cooling water pump in the cooling system to form a heating circuit. During the cold start process, the coolant is heated by the heater so that the heated coolant circulates in the fuel cell stack, so that the internal temperature of the fuel cell stack can be quickly raised to the temperature required for starting, thereby achieving low temperature starting. However, this improvement method for the fuel cell system does not solve the problem that the hydrogen circulation pump in the anode system is extremely easy to freeze in low temperature environments, and there is still a technical problem that the fuel cell system cannot be started in low temperature environments.

[0046] To this end, the present application adds a heat transfer water jacket between the outer casing and the pump body of the hydrogen circulation pump, and the heat transfer water jacket forms a heat transfer circuit that is connected to the heating circuit and the heat dissipation circuit in the cooling system; during the cold start process of the fuel cell system, the heating circuit in the cooling system is controlled to be opened so that the heat transfer circuit through the heat transfer water jacket of the hydrogen circulation pump is connected to the heating circuit, and the heating circuit in the cooling system is controlled to heat the coolant so that the heated coolant circulates in the heat transfer circuit and the heating circuit, thereby achieving rapid heating of the fuel cell stack and the hydrogen circulation pump, thereby improving the cold start performance of the fuel cell system; during the thermal shutdown process of the fuel cell system, the heat dissipation circuit in the cooling system is controlled to be opened so that the heat transfer circuit through the heat transfer water jacket of the hydrogen circulation pump is connected to the heat dissipation circuit. , controlling the heat dissipation circuit in the cooling system to cool the coolant so that the cooled coolant circulates in the heat transfer circuit and the heat dissipation circuit, thereby achieving a rapid reduction in the temperature difference between the current coolant temperature flowing through the heat transfer water jacket and the current hydrogen temperature flowing into the hydrogen circulation pump, ensuring that the temperature difference between the inside and outside of the hydrogen circulation pump is maintained within a small range after the fuel cell system is thermally shut down, thereby effectively avoiding the increase of condensed water between the heat transfer water jacket and the pump body in the hydrogen circulation pump due to the large temperature difference between the coolant temperature in the heat transfer water jacket of the hydrogen circulation pump and the hydrogen temperature in the pump body, and then causing the problem of easy freezing inside the hydrogen circulation pump in a low temperature environment, further ensuring that the fuel cell system can be started smoothly in a low temperature environment, and improving the cold start performance of the fuel cell system.

[0047] After introducing the application scenarios and design ideas of this application, the technical solutions provided by this application are described in detail below.

[0048] The embodiment of the present application provides a fuel cell system, which includes at least a fuel cell stack, an anode system for supplying hydrogen to the fuel cell stack, a cathode system for supplying air to the fuel cell stack, a cooling system for cooling the fuel cell stack, and a fuel cell control device for coordinating and controlling the anode system, the cathode system, and the cooling system; wherein, referring to Figure 1 As shown, the cooling system at least includes a cooling bypass valve, a cooling fan, a cooling water pump and a heater; the cooling bypass valve, the cooling fan and the cooling water pump form a heat dissipation loop; the cooling bypass valve, the heater and the cooling water pump form a heating loop; the anode system at least includes a hydrogen circulation pump provided with a heat transfer water jacket between the housing and the pump body; the heat transfer water jacket forms a heat transfer loop and is connected to the cooling system; in one embodiment, the coolant inlet of the heat transfer water jacket is connected to the coolant outlet of the cooling water pump, and the coolant outlet of the heat transfer water jacket is connected to the coolant inlet of the cooling water pump, thereby realizing the connection between the heat transfer loop and the cooling system; in another embodiment, the coolant inlet of the heat transfer water jacket is connected to the coolant outlet of the cooling water pump, and the coolant outlet of the heat transfer water jacket is connected to the coolant inlet of the cooling bypass valve, thereby realizing the connection between the heat transfer loop and the cooling system.

[0049] An embodiment of the present application also provides a hydrogen fuel cell vehicle, which includes at least a body, a chassis frame, wheels, a vehicle control system, and a power system, wherein the power system includes at least an electric motor and the above-mentioned fuel cell system provided in an embodiment of the present application.

[0050] Based on the above embodiments, embodiments of the present application provide a fuel cell system control method, which is applied to a fuel cell control device in a fuel cell system. The fuel cell system control method includes a fuel cell system control method during a cold start process and a fuel cell system control method during a hot shutdown process, wherein:

[0051] See Figure 2 As shown, the overview process of the fuel cell system control method during the cold start process provided by the embodiment of the present application is as follows:

[0052] Step 201: During a cold start of a fuel cell system, control opening of a heating circuit in a cooling system of the fuel cell system so that the heat transfer circuit of a heat transfer water jacket of a hydrogen circulation pump in an anode system of the fuel cell system is connected to the heating circuit.

[0053] In an embodiment of the present application, during the cold start process of the fuel cell system, the fuel cell control device can control the cooling bypass valve in the cooling system to open the coolant inlet 1 and the first coolant outlet 2 and close the second coolant outlet 3, so as to open the heating circuit through the heater, the coolant water pump and the fuel cell stack, and connect the heat transfer circuit of the water transfer jacket through the hydrogen circulation pump with the heating circuit.

[0054] Step 202: According to the target coolant temperature required for starting the fuel cell system, the heating circuit is controlled to heat the coolant so that the current coolant temperature flowing through the fuel cell stack and the heat transfer jacket reaches the target coolant temperature, thereby successfully starting the hydrogen circulation pump and the fuel cell stack.

[0055] In an embodiment of the present application, the fuel cell control device can determine the target operating power of the heater in the heating circuit and the target water pump speed of the cooling water pump based on the target coolant temperature required for starting the fuel cell system, control the operation of the heater according to the target operating power, and control the operation of the cooling water pump according to the target water pump speed, so that the heating circuit heats the coolant, so that the hydrogen circulation pump and the fuel cell stack can be successfully started when the current coolant temperature flowing through the fuel cell stack and the heat transfer water jacket reaches the target coolant temperature.

[0056] During the cold start process of the fuel cell system, the heating circuit in the cooling system is opened to connect the heat transfer circuit of the heat transfer water jacket of the hydrogen circulation pump with the heating circuit. The heating circuit in the cooling system can be used to heat the coolant so that the heated coolant circulates in the heat transfer circuit and the heating circuit, thereby achieving rapid heating of the fuel cell stack and the hydrogen circulation pump, thereby improving the cold start performance of the fuel cell system. However, when the temperature of the coolant in the heat transfer circuit and the heating circuit rises, the coolant inside the heat transfer water jacket of the hydrogen circulation pump is in a high temperature state, and sometimes the temperature of the coolant inside the heat transfer water jacket is higher than the temperature of the hydrogen inside the pump body. When the temperature difference between the temperature of the coolant inside the heat transfer water jacket and the temperature of the hydrogen inside the pump body is too large, the low temperature environment will cause an increase in condensed water between the heat transfer water jacket inside the hydrogen circulation pump and the pump body, which will then cause ice to form between the heat transfer water jacket inside the hydrogen circulation pump and the pump body. Moreover, since the freezing point is facing away from the hydrogen pipeline of the hydrogen circulation pump, the fuel cell system cannot be purged during shutdown, which will cause the hydrogen circulation pump to freeze again after the fuel cell system is thermally shut down. In order to solve this technical problem, the embodiment of the present application provides a fuel cell system control method during thermal shutdown, refer to Figure 3 As shown, the overview process of the fuel cell system control method during the thermal shutdown process provided by the embodiment of the present application is as follows:

[0057] Step 301: During thermal shutdown of the fuel cell system, control opening of a heat dissipation circuit in a cooling system of the fuel cell system so that the heat transfer circuit of the water transfer jacket of the hydrogen circulation pump in the anode system of the fuel cell system is connected to the heat dissipation circuit.

[0058] In an embodiment of the present application, during the thermal shutdown process of the fuel cell system, the fuel cell control device can control the cooling bypass valve in the cooling system to open the coolant inlet 1 and the second coolant outlet 3 and close the first coolant outlet 2, so as to open the heat dissipation circuit through the cooling fan, the coolant water pump and the fuel cell stack, and connect the heat transfer circuit of the water transfer jacket through the hydrogen circulation pump with the heat dissipation circuit.

[0059] Step 302: According to the current temperature of hydrogen flowing into the hydrogen circulation pump, the heat dissipation circuit is controlled to cool the coolant so that the temperature difference between the current temperature of the coolant flowing through the heat transfer water jacket and the current temperature of the hydrogen flowing into the hydrogen circulation pump is reduced to a target range.

[0060] In the embodiment of the present application, the fuel cell control device controls the heat dissipation circuit to cool the coolant according to the current temperature of the hydrogen flowing into the hydrogen circulation pump, so that the temperature difference between the current temperature of the coolant flowing through the heat transfer jacket and the current temperature of the hydrogen flowing into the hydrogen circulation pump is reduced to a target range. The following methods may be used, but are not limited to:

[0061] First, the fuel cell control device obtains the current hydrogen temperature and the current coolant temperature.

[0062] Specifically, the fuel cell control device can collect the current temperature of the hydrogen flowing into the hydrogen circulation pump through a first temperature sensor arranged on the hydrogen pipeline between the hydrogen outlet of the fuel cell stack and the hydrogen inlet of the hydrogen circulation pump, and collect the current temperature of the coolant flowing through the heat transfer water jacket through a second temperature sensor arranged on the coolant pipeline between the coolant inlet of the fuel cell stack and the coolant outlet of the cooling water pump.

[0063] Then, the fuel cell control device determines target operating parameters corresponding to the current hydrogen temperature and the current coolant temperature; wherein the target operating parameters at least include a target fan speed and a target water pump speed.

[0064] Specifically, the fuel cell control device may adopt, but is not limited to, any of the following methods:

[0065] The first method: based on the pre-calibrated correspondence between the fan speed of the cooling fan in the cooling circuit, the hydrogen temperature flowing into the hydrogen circulation pump, and the coolant temperature flowing through the heat transfer water jacket, the fan speed corresponding to the current hydrogen temperature and the current coolant temperature is determined as the target fan speed of the cooling fan; and based on the pre-calibrated correspondence between the water pump speed of the cooling water pump in the cooling circuit, the hydrogen temperature flowing into the hydrogen circulation pump, and the coolant temperature flowing through the heat transfer water jacket, the water pump speed corresponding to the current hydrogen temperature and the current coolant temperature is determined as the target water pump speed of the cooling water pump.

[0066] The second method is to obtain a preset target fan speed of the cooling fan in the cooling circuit during the thermal shutdown process of the fuel cell system, wherein the target fan speed can be a fixed speed, such as the maximum fan speed; and based on the pre-calibrated correspondence between the water pump speed of the cooling water pump in the cooling circuit under the condition of the target fan speed and the hydrogen temperature flowing into the hydrogen circulation pump and the coolant temperature flowing through the heat transfer water jacket, the water pump speed corresponding to the current hydrogen temperature and the current coolant temperature is determined as the target water pump speed of the cooling water pump.

[0067] The third method: obtaining a preset target water pump speed of the cooling water pump in the heat dissipation circuit during the thermal shutdown process of the fuel cell system, wherein the target water pump speed can be a fixed speed, such as the maximum water pump speed; and based on the pre-calibrated correspondence between the fan speed of the cooling fan in the heat dissipation circuit under the condition of the target water pump speed and the hydrogen temperature flowing into the hydrogen circulation pump and the coolant temperature flowing through the heat transfer water jacket, the fan speed corresponding to the current hydrogen temperature and the current coolant temperature is determined as the target fan speed of the cooling fan.

[0068] Finally, the fuel cell control device controls the operation of the heat dissipation circuit according to the target operating parameters of the heat dissipation circuit, so that the temperature difference between the current coolant temperature flowing through the heat transfer jacket and the current hydrogen temperature flowing into the hydrogen circulation pump is reduced to the target range.

[0069] Specifically, the fuel cell control device can control the operation of the cooling fan in the cooling circuit based on the target fan speed, and control the operation of the cooling water pump in the cooling circuit based on the target water pump speed, so as to reduce the temperature difference between the current coolant temperature flowing through the water transfer jacket and the current hydrogen temperature flowing into the hydrogen circulation pump to a target range through the cooling circuit.

[0070] Furthermore, the fuel cell control device controls the heat dissipation circuit to cool the coolant according to the current temperature of the hydrogen flowing into the hydrogen circulation pump, so that the temperature difference between the current temperature of the coolant flowing through the heat transfer jacket and the current temperature of the hydrogen flowing into the hydrogen circulation pump is reduced to a target range, and then the heat dissipation fan and the cooling water pump can be controlled to be turned off; wherein, the coolant heat dissipation strategy and the shutdown purge strategy provided in the embodiment of the present application are independent of each other. During the thermal shutdown process of the fuel cell system, the coolant heat dissipation strategy and the shutdown purge strategy are carried out simultaneously. After the coolant heat dissipation strategy and the shutdown purge strategy are both executed, the fuel cell system shutdown is completed.

[0071] The fuel cell system control method provided in the embodiment of the present application is further described in detail using a specific embodiment. Figure 4 As shown, the specific process of the fuel cell system control method provided in the embodiment of the present application is as follows:

[0072] Step 401: During the cold start of the fuel cell system, the fuel cell control device controls the cooling bypass valve in the cooling system to open the coolant inlet 1 and the first coolant outlet 2 and close the second coolant outlet 3, so as to open the heating circuit through the heater, the coolant water pump and the fuel cell stack, and connect the heat transfer circuit of the water transfer jacket through the hydrogen circulation pump with the heating circuit.

[0073] Step 402: The fuel cell control device determines the target operating power of the heater in the heating circuit and the target water pump speed of the cooling water pump based on the target coolant temperature required for starting the fuel cell system.

[0074] Step 403: The fuel cell control device controls the operation of the heater according to the target operating power, and controls the operation of the cooling water pump according to the target water pump speed, so that the heating circuit heats the coolant. When the current coolant temperature flowing through the fuel cell stack and the water transfer jacket reaches the target coolant temperature, the hydrogen circulation pump and the fuel cell stack are successfully started, so that the fuel cell system starts to operate.

[0075] Step 404: During the thermal shutdown of the fuel cell system, the fuel cell control device controls the cooling bypass valve in the cooling system to open the coolant inlet 1 and the second coolant outlet 3 and close the first coolant outlet 2, so as to open the heat dissipation circuit through the cooling fan, the coolant water pump and the fuel cell stack, and connect the heat transfer circuit of the water transfer jacket through the hydrogen circulation pump with the heat dissipation circuit.

[0076] Step 405: The fuel cell control device determines the fan speed corresponding to the current hydrogen temperature and the current coolant temperature as the target fan speed of the cooling fan based on the pre-calibrated correspondence between the fan speed of the cooling fan in the cooling circuit, the hydrogen temperature flowing into the hydrogen circulation pump, and the coolant temperature flowing through the heat transfer water jacket; and determines the water pump speed corresponding to the current hydrogen temperature and the current coolant temperature as the target water pump speed of the cooling water pump based on the pre-calibrated correspondence between the water pump speed of the cooling water pump in the cooling circuit, the hydrogen temperature flowing into the hydrogen circulation pump, and the coolant temperature flowing through the heat transfer water jacket.

[0077] Step 406: The fuel cell control device controls the operation of the cooling fan in the cooling circuit based on the target fan speed, and controls the operation of the cooling water pump in the cooling circuit based on the target water pump speed, so as to reduce the temperature difference between the current coolant temperature flowing through the water transfer jacket and the current hydrogen temperature flowing into the hydrogen circulation pump to a target range through the cooling circuit.

[0078] Step 407: The fuel cell control device controls to turn off the cooling fan and the cooling water pump.

[0079] Based on the above embodiments, the present application provides a fuel cell system control device, which is applied to a fuel cell control device in a fuel cell system. Figure 5 As shown, the fuel cell system control device 500 provided in the embodiment of the present application includes at least:

[0080] a circuit control unit 501 for controlling, during a thermal shutdown of the fuel cell system, opening a heat dissipation circuit in the cooling system of the fuel cell system so that the heat transfer circuit through the heat transfer water jacket of the hydrogen circulation pump in the anode system of the fuel cell system communicates with the heat dissipation circuit;

[0081] The temperature difference control unit 502 is used to control the heat dissipation circuit to cool the coolant according to the current temperature of the hydrogen flowing into the hydrogen circulation pump, so that the temperature difference between the current temperature of the coolant flowing through the heat transfer water jacket and the current temperature of the hydrogen flowing into the hydrogen circulation pump is reduced to a target range.

[0082] In one possible embodiment, the temperature difference control unit 502 is specifically used to determine target operating parameters corresponding to the current hydrogen temperature and the current coolant temperature; according to the target operating parameters, the heat dissipation circuit operation is controlled to reduce the temperature difference between the current coolant temperature flowing through the heat transfer water jacket and the current hydrogen temperature flowing into the hydrogen circulation pump to within a target range.

[0083] In one possible embodiment, the target operating parameters include a target fan speed and a target water pump speed; the temperature difference control unit 502 is specifically used to determine the fan speed corresponding to the current hydrogen temperature and the current coolant temperature as the target fan speed of the cooling fan based on a pre-calibrated correspondence between the fan speed of the cooling fan in the cooling circuit, the hydrogen temperature flowing into the hydrogen circulation pump, and the coolant temperature flowing through the heat transfer water jacket; based on a pre-calibrated correspondence between the water pump speed of the cooling water pump in the cooling circuit, the hydrogen temperature flowing into the hydrogen circulation pump, and the coolant temperature flowing through the heat transfer water jacket, determine the water pump speed corresponding to the current hydrogen temperature and the current coolant temperature as the target water pump speed of the cooling water pump.

[0084] In one possible embodiment, the target operating parameters include a target fan speed and a target water pump speed; the temperature difference control unit 502 is specifically used to obtain a preset target fan speed of the cooling fan in the cooling circuit during the thermal shutdown process of the fuel cell system; based on the pre-calibrated correspondence between the water pump speed of the cooling water pump in the cooling circuit under the condition of the target fan speed and the hydrogen temperature flowing into the hydrogen circulation pump and the coolant temperature flowing through the heat transfer water jacket, the water pump speed corresponding to the current hydrogen temperature and the current coolant temperature is determined as the target water pump speed of the cooling water pump.

[0085] In one possible embodiment, the target operating parameters include a target fan speed and a target water pump speed; the temperature difference control unit 502 is specifically used to obtain a preset target water pump speed of the cooling water pump in the heat dissipation circuit during the thermal shutdown process of the fuel cell system; based on the pre-calibrated correspondence between the fan speed of the cooling fan in the heat dissipation circuit under the condition of the target water pump speed and the hydrogen temperature flowing into the hydrogen circulation pump and the coolant temperature flowing through the heat transfer water jacket, the fan speed corresponding to the current hydrogen temperature and the current coolant temperature is determined as the target fan speed of the cooling fan.

[0086] In one possible embodiment, the target operating parameters include a target fan speed and a target water pump speed; the temperature difference control unit 502 is specifically used to control the operation of the cooling fan in the cooling circuit based on the target fan speed, and to control the operation of the cooling water pump in the cooling circuit based on the target water pump speed, so as to reduce the temperature difference between the current coolant temperature flowing through the water transfer jacket and the current hydrogen temperature flowing into the hydrogen circulation pump to a target range through the cooling circuit.

[0087] In a possible implementation, the circuit control unit 501 is further configured to control the closing of a heat dissipation circuit in a cooling system of the fuel cell system.

[0088] It should be noted that the principle of solving technical problems by the fuel cell system control device 500 provided in the embodiment of the present application is similar to the fuel cell system control method provided in the embodiment of the present application. Therefore, the implementation of the fuel cell system control device 500 provided in the embodiment of the present application can refer to the implementation of the fuel cell system control method provided in the embodiment of the present application, and the repeated parts will not be repeated.

[0089] After introducing the fuel cell system and its control method and device provided in the embodiments of the present application, the fuel cell control device provided in the embodiments of the present application is briefly introduced next.

[0090] The fuel cell control device provided in the embodiment of the present application may be, but is not limited to, a fuel cell controller (FCU) in a fuel cell system, etc. Figure 6 As shown, the fuel cell control device 600 provided in the embodiment of the present application includes at least a processor 601, a memory 602, and a computer program stored in the memory 602 and executable on the processor 601. When the processor 601 executes the computer program, the above-mentioned fuel cell system control method provided in the embodiment of the present application is implemented.

[0091] The fuel cell control device 600 provided in the embodiment of the present application may further include a bus 603 connecting different components (including the processor 601 and the memory 602). The bus 603 represents one or more of several types of bus structures, including a memory bus, a peripheral bus, a local bus, and the like.

[0092] The memory 602 may include a readable medium in the form of a volatile memory, such as a random access memory (RAM) 6021 and / or a cache memory 6022, and may further include a read-only memory (ROM) 6023. The memory 602 may also include a program tool 6025 having a set (at least one) of program modules 6024. The program modules 6024 include, but are not limited to, an operating subsystem, one or more application programs, other program modules, and program data. Each of these examples or some combination thereof may include the implementation of a network environment.

[0093] The processor 601 may be a processing element or a collective term for multiple processing elements. For example, the processor 601 may be a microcontroller unit (MCU), a central processing unit (CPU), or one or more integrated circuits configured to implement the fuel cell system control method provided in the embodiments of the present application. Specifically, the processor 601 may be a general-purpose processor, including but not limited to a CPU, an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.

[0094] The fuel cell control device 600 can communicate with one or more devices that enable a user to interact with the fuel cell control device 600 (e.g., a mobile phone, a computer, etc.), and / or various external devices 604 such as devices that enable the fuel cell control device 600 to communicate with one or more other fuel cell control devices (e.g., a router, a modem, etc.). Such communication can be performed through an input / output (I / O) interface 605. In addition, the fuel cell control device 600 can also communicate with one or more networks (e.g., a local area network (LAN), a wide area network (WAN), and / or a public network, such as the Internet) through a network adapter 606. Figure 6 As shown, the network adapter 606 communicates with other modules of the fuel cell control device 600 via the bus 603. Figure 6 Not shown, other hardware and / or software modules may be used in conjunction with the fuel cell control device 600, including but not limited to microcode, device drivers, redundant processors, external disk drive arrays, disk arrays (Redundant Arrays of Independent Disks, RAID) subsystems, tape drives, and data backup storage subsystems.

[0095] It should be noted that Figure 6 The fuel cell control device 600 shown is merely an example and should not limit the functions and scope of use of the embodiments of the present application.

[0096] In addition, embodiments of the present application further provide a computer-readable storage medium storing computer instructions. When executed by a processor, these computer instructions implement the fuel cell system control method provided in embodiments of the present application. Specifically, the computer instructions may be built into or installed in the processor. Thus, the processor can implement the fuel cell system control method provided in embodiments of the present application by executing the built-in or installed computer instructions.

[0097] Moreover, the fuel cell system control method provided in the embodiment of the present application can also be implemented as a program product, which includes program code. When the program code is executed by a processor, it implements the above-mentioned fuel cell system control method provided in the embodiment of the present application.

[0098] The program product provided in the embodiments of the present application may adopt any combination of one or more readable media, wherein the readable medium may be a readable signal medium or a readable storage medium, and the readable storage medium may be, but is not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus or device, or any combination of the above. Specifically, more specific examples of readable storage media (a non-exhaustive list) include an electrical connection with one or more wires, a portable disk, a hard disk, RAM, ROM, Erasable Programmable Read Only Memory (EPROM), optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0099] The program product provided in the embodiments of the present application may be a CD-ROM and include program code, and may also be run on a fuel cell control device, such as an FCU. However, the program product provided in the embodiments of the present application is not limited thereto. In the embodiments of the present application, the readable storage medium may be any tangible medium containing or storing a program, which may be used by or in conjunction with an instruction execution system, apparatus, or device.

[0100] It should be noted that although several units or subunits of the device are mentioned in the detailed description above, this division is merely exemplary and not mandatory. In fact, depending on the embodiment of the application, the features and functions of two or more units described above can be embodied in a single unit. Conversely, the features and functions of a single unit described above can be further divided and embodied by multiple units.

[0101] Furthermore, although the operations of the method of the present application are described in a particular order in the accompanying drawings, this does not require or imply that the operations must be performed in this particular order, or that all illustrated operations must be performed to achieve the desired results. Additionally or alternatively, some steps may be omitted, multiple steps may be combined into one step, and / or one step may be decomposed into multiple steps.

[0102] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they become aware of the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present application.

[0103] Obviously, those skilled in the art may make various changes and modifications to the embodiments of the present application without departing from the spirit and scope of the embodiments of the present application. Thus, if these modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalents, the present application also intends to include such modifications and variations.

Claims

1. A fuel cell system control method, characterized in that: include: During a thermal shutdown of the fuel cell system, controlling to open a heat dissipation circuit in a cooling system of the fuel cell system so that a heat transfer circuit through a heat transfer water jacket of a hydrogen circulation pump in an anode system of the fuel cell system communicates with the heat dissipation circuit; According to the current temperature of the hydrogen flowing into the hydrogen circulation pump, the heat dissipation circuit is controlled to cool the coolant so that the temperature difference between the current temperature of the coolant flowing through the heat transfer water jacket and the current temperature of the hydrogen flowing into the hydrogen circulation pump is reduced to a target range.

2. The fuel cell system control method according to claim 1, wherein: According to the current temperature of the hydrogen flowing into the hydrogen circulation pump, the heat dissipation circuit is controlled to cool the coolant so that the temperature difference between the current temperature of the coolant flowing through the heat transfer jacket and the current temperature of the hydrogen flowing into the hydrogen circulation pump is reduced to a target range, including: determining target operating parameters corresponding to the current hydrogen temperature and the current coolant temperature; According to the target operating parameters, the heat dissipation circuit is controlled to operate so that the temperature difference between the current coolant temperature flowing through the heat transfer water jacket and the current hydrogen temperature flowing into the hydrogen circulation pump is reduced to a target range.

3. The fuel cell system control method according to claim 2, wherein: The target operating parameters include a target fan speed and a target water pump speed; determining the target operating parameters corresponding to the current hydrogen temperature and the current coolant temperature includes: Based on a pre-calibrated correspondence between a fan speed of the cooling fan in the cooling circuit, a temperature of the hydrogen flowing into the hydrogen circulation pump, and a temperature of the coolant flowing through the heat transfer jacket, determining a fan speed corresponding to the current hydrogen temperature and the current coolant temperature as a target fan speed of the cooling fan; Based on a pre-calibrated correspondence between the water pump speed of the cooling water pump in the heat dissipation circuit, the temperature of the hydrogen flowing into the hydrogen circulation pump, and the temperature of the coolant flowing through the heat transfer jacket, the water pump speed corresponding to the current hydrogen temperature and the current coolant temperature is determined as the target water pump speed of the cooling water pump.

4. The fuel cell system control method according to claim 2, wherein: The target operating parameters include a target fan speed and a target water pump speed; determining the target operating parameters corresponding to the current hydrogen temperature and the current coolant temperature includes: Obtaining a preset target fan speed of a cooling fan in the cooling circuit during a thermal shutdown process of the fuel cell system; Based on a pre-calibrated correspondence between the water pump speed of the cooling water pump in the heat dissipation circuit under the condition of the target fan speed, the hydrogen temperature flowing into the hydrogen circulation pump, and the coolant temperature flowing through the heat transfer jacket, the water pump speed corresponding to the current hydrogen temperature and the current coolant temperature is determined as the target water pump speed of the cooling water pump.

5. The fuel cell system control method according to claim 2, wherein: The target operating parameters include a target fan speed and a target water pump speed; determining the target operating parameters corresponding to the current hydrogen temperature and the current coolant temperature includes: Obtaining a preset target water pump speed of the cooling water pump in the heat dissipation circuit during a thermal shutdown process of the fuel cell system; Based on a pre-calibrated correspondence between the fan speed of the cooling fan in the cooling circuit under the condition of the target water pump speed, the temperature of the hydrogen flowing into the hydrogen circulation pump, and the temperature of the coolant flowing through the heat transfer water jacket, the fan speed corresponding to the current hydrogen temperature and the current coolant temperature is determined as the target fan speed of the cooling fan.

6. The fuel cell system control method according to any one of claims 2 to 5, wherein: The target operating parameters include a target fan speed and a target water pump speed; and controlling the operation of the heat dissipation circuit according to the target operating parameters so that the temperature difference between the current coolant temperature flowing through the heat transfer water jacket and the current hydrogen temperature flowing into the hydrogen circulation pump is reduced to a target range, including: The operation of the cooling fan in the cooling circuit is controlled based on the target fan speed, and the operation of the cooling water pump in the cooling circuit is controlled based on the target water pump speed, so as to reduce the temperature difference between the current coolant temperature flowing through the water transfer jacket and the current hydrogen temperature flowing into the hydrogen circulation pump through the cooling circuit to a target range.

7. The fuel cell system control method according to claim 1, wherein: According to the current temperature of the hydrogen flowing into the hydrogen circulation pump, the heat dissipation circuit is controlled to cool the coolant so that the temperature difference between the current temperature of the coolant flowing through the heat transfer water jacket and the current temperature of the hydrogen flowing into the hydrogen circulation pump is reduced to a target range, and further comprising: The heat dissipation circuit in the cooling system of the fuel cell system is controlled to be closed.

8. A fuel cell system control device, characterized in that: include: a circuit control unit, configured to control opening of a heat dissipation circuit in a cooling system of the fuel cell system during thermal shutdown of the fuel cell system so that a heat transfer circuit passing through a heat transfer water jacket of a hydrogen circulation pump in an anode system of the fuel cell system communicates with the heat dissipation circuit; The temperature difference control unit is used to control the heat dissipation circuit to cool the coolant according to the current temperature of the hydrogen flowing into the hydrogen circulation pump, so that the temperature difference between the current temperature of the coolant flowing through the heat transfer water jacket and the current temperature of the hydrogen flowing into the hydrogen circulation pump is reduced to a target range.

9. A fuel cell control device, characterized in that: The method comprises a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the fuel cell system control method according to any one of claims 1 to 7 when executing the computer program.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer instructions, and when the computer instructions are executed by a processor, the fuel cell system control method according to any one of claims 1 to 7 is implemented.

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