A fuel cell system control method, device, equipment and medium

Abstract

The application discloses a fuel cell system control method, device, equipment and medium, which is applied to the technical field of fuel cell and comprises the following steps: in the process of thermal shutdown of a fuel cell system, a heat dissipation loop in a cooling system of the fuel cell system is controlled to be opened to make the heat dissipation loop communicate with a heat transfer loop of a heat transfer jacket of a hydrogen circulation pump in an anode system of the fuel cell system, and the cooling liquid in the heat transfer loop is controlled to be cooled by the heat dissipation loop according to the current hydrogen temperature flowing into the hydrogen circulation pump, so that the temperature difference between the current cooling liquid temperature flowing through the heat transfer jacket and the current hydrogen temperature flowing into the hydrogen circulation pump is reduced to a target range, thereby effectively solving the problem of ice formation of the hydrogen circulation pump after thermal shutdown, ensuring that the fuel cell system can be started smoothly in a low-temperature environment, and further improving the cold start performance of the fuel cell system.

Description

Technical Field

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

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

[0003] This application provides a fuel cell system control method, apparatus, equipment, and medium to solve the problem that fuel cell systems in the prior art often fail to start during cold start due to internal icing. Specifically, the technical solution provided by this application is as follows:

[0004] On the one hand, this application provides a fuel cell system control method, including:

[0005] During the thermal shutdown process of the fuel cell system, the heat dissipation circuit in the cooling system of the fuel cell system is opened to connect the heat transfer circuit of the heat transfer jacket of the hydrogen circulation pump in the anode system of the fuel cell system with the heat dissipation circuit.

[0006] Based on the current hydrogen temperature 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 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.

[0007] In one possible implementation, the cooling circuit is controlled to cool the coolant in the heat transfer circuit according to the current hydrogen temperature flowing into the hydrogen circulation pump, 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 a target range, including:

[0008] Determine the target operating parameters corresponding to the current hydrogen temperature and the current coolant temperature;

[0009] According to the target operating parameters, control the operation of the heat dissipation circuit to reduce 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 to the target range.

[0010] In one possible implementation, the target operating parameters include the target fan speed and the 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 heat dissipation circuit and the temperature of the hydrogen flowing into the hydrogen circulation pump and the temperature of the coolant 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 pump speed of the cooling water pump in the heat dissipation circuit and the temperature of the hydrogen flowing into the hydrogen circulation pump and the temperature of the coolant flowing through the heat transfer jacket, the pump speed corresponding to the current hydrogen temperature and the current coolant temperature is determined as the target pump speed of the cooling water pump.

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

[0014] Obtain the target fan speed of the cooling fan in the heat dissipation circuit during the pre-set thermal shutdown process of the fuel cell system;

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

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

[0017] Obtain the target water pump speed of the cooling water pump in the heat dissipation circuit during the pre-set thermal shutdown process of the fuel cell system;

[0018] Based on the pre-calibrated correspondence between the fan speed of the cooling fan in the heat dissipation circuit and the temperature of the hydrogen flowing into the hydrogen circulation pump and the temperature of the coolant flowing through the heat transfer jacket under the condition of the target water pump speed, 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; according to the target operating parameters, the operation of the heat dissipation circuit is controlled to reduce 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 to a target range, including:

[0020] The cooling fan in the heat dissipation circuit is controlled based on the target fan speed, and the cooling water pump in the heat dissipation circuit is controlled based on the target water pump speed, so as to reduce 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 to the target range through the heat dissipation circuit.

[0021] In one possible implementation, after controlling the cooling circuit to cool the coolant in the heat transfer circuit according to the current hydrogen temperature flowing into the hydrogen circulation pump, 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 a target range, the method further includes:

[0022] Control the shutdown of the heat dissipation circuit within the cooling system of the fuel cell system.

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

[0024] The loop control unit is used to control the opening of the heat dissipation loop in the cooling system of the fuel cell system during the thermal shutdown process of the fuel cell system so that the heat transfer loop of the heat transfer jacket of the hydrogen circulation pump in the anode system of the fuel cell system is connected to the heat dissipation loop.

[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 hydrogen temperature flowing into the hydrogen circulation pump, 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.

[0026] On the other hand, this 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, it implements the above-described fuel cell system control method.

[0027] On the other hand, this application also provides a computer-readable storage medium storing computer instructions that, when executed by a processor, implement the above-described fuel cell system control method.

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

[0029] This application adds a heat transfer jacket to the hydrogen circulation pump and a heat transfer circuit that connects to the cooling system via the heat transfer jacket. During the thermal shutdown of the fuel cell system, the heat transfer circuit and the heat dissipation circuit are connected by opening the heat dissipation circuit in the cooling system. This allows the heat dissipation circuit to cool the coolant, which then circulates in both circuits. This rapidly reduces 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. This ensures that the internal and external temperature difference of the hydrogen circulation pump remains within a small range after the fuel cell system's thermal shutdown. It effectively prevents the accumulation of condensate inside the hydrogen circulation pump due to a large temperature difference, which could lead to icing inside the pump at low temperatures. This ensures smooth start-up of the fuel cell system at low temperatures and improves its cold start performance.

[0030] Other features and advantages of this application will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the application. The objectives and other advantages of this application may be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings. Attached Figure Description

[0031] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0032] Figure 1 This is a schematic diagram of the composition structure of the fuel cell system in the embodiments of this application;

[0033] Figure 2 This is a schematic flowchart of a fuel cell system control method in an embodiment of this application;

[0034] Figure 3 This is another overview flowchart of the fuel cell system control method in the embodiments of this application;

[0035] Figure 4 This is a schematic flowchart illustrating the fuel cell system control method in the embodiments of this application;

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

[0037] Figure 6 This is a schematic diagram of the hardware structure of the fuel cell control device in the embodiments of this application. Detailed Implementation

[0038] To make the objectives, technical solutions, and beneficial effects of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0039] To facilitate a better understanding of this application by those skilled in the art, the technical terms used in this application will be briefly introduced below.

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

[0042] A heat transfer circuit is a circuit used to heat or dissipate heat from a heat transfer jacket located between the outer casing and the pump body of a hydrogen circulation pump by means of the temperature of the coolant in the cooling system. In this application, the heat transfer circuit consists of at least a heat transfer 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 the target fan speed and the target water pump speed, etc.

[0044] After introducing the technical terms used in this application, the application scenarios and design concepts of this application will be briefly introduced next.

[0045] To address the issue of fuel cell systems failing to start due to internal icing in low-temperature environments, special designs are typically added to improve the system. 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 cold starts, the heater heats the coolant, causing it to circulate within the stack. This allows the internal temperature of the stack to rise rapidly to the required starting temperature, thus enabling low-temperature startup. However, this improvement does not resolve the problem of the hydrogen circulation pump in the anode system easily freezing in low-temperature environments, and the technical issue of the fuel cell system failing to start in low-temperature conditions remains.

[0046] To address this, this application adds a heat transfer jacket between the outer casing and the pump body of the hydrogen circulation pump, and the heat transfer jacket forms a heat transfer circuit that connects with the heating and heat dissipation circuits in the cooling system. During the cold start of the fuel cell system, the heating circuit in the cooling system is controlled to open, so that the heat transfer circuit via the heat transfer jacket of the hydrogen circulation pump is connected to the heating circuit. The heating circuit in the cooling system heats the coolant, causing the heated coolant to circulate in the heat transfer and heating circuits, thereby achieving rapid temperature rise of the fuel cell stack and the hydrogen circulation pump, and thus improving the cold start performance of the fuel cell system. During the hot shutdown of the fuel cell system, the heat dissipation circuit in the cooling system is controlled to open, so that the heat transfer circuit via the heat transfer jacket of the hydrogen circulation pump is connected to the heat dissipation circuit. The cooling system controls the heat dissipation circuit within the cooling system to cool the coolant, allowing the cooled coolant to circulate in the heat transfer and heat dissipation circuits. This rapidly reduces 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. This ensures that the temperature difference between the inside and outside of the hydrogen circulation pump remains within a small range after the fuel cell system is thermally shut down. Consequently, it effectively prevents the accumulation of condensate between the heat transfer jacket and the pump body due to a large temperature difference between the coolant temperature in the heat transfer jacket and the hydrogen temperature in the pump body, which could lead to icing inside the hydrogen circulation pump at low temperatures. This further ensures that the fuel cell system can start smoothly at low temperatures and improves the cold start performance of the fuel cell system.

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

[0048] This 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, cathode system, and cooling system; wherein, see reference Figure 1 As shown, the cooling system includes at least a cooling bypass valve, a cooling fan, a cooling water pump, and a heater; the cooling bypass valve, cooling fan, and cooling water pump form a heat dissipation circuit; the cooling bypass valve, heater, and cooling water pump form a heating circuit; the anode system includes at least a hydrogen circulation pump with a heat transfer jacket disposed between the outer casing and the pump body; the heat transfer jacket forms a heat transfer circuit and is connected to the cooling system; in one embodiment, the coolant inlet of the heat transfer jacket is connected to the coolant outlet of the cooling water pump, and the coolant outlet of the heat transfer jacket is connected to the coolant inlet of the cooling water pump, thereby realizing the connection between the heat transfer circuit and the cooling system; in another embodiment, the coolant inlet of the heat transfer jacket is connected to the coolant outlet of the cooling water pump, and the coolant outlet of the heat transfer jacket is connected to the coolant inlet of the cooling bypass valve, thereby realizing the connection between the heat transfer circuit and the cooling system.

[0049] This 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 fuel cell system provided in this application.

[0050] Based on the above embodiments, this application provides a fuel cell system control method, 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 cold start and a fuel cell system control method during hot shutdown, wherein:

[0051] See Figure 2 As shown in the embodiments of this application, the general flow of the fuel cell system control method during the cold start process is as follows:

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

[0053] In this embodiment of the 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 via the heater, coolant pump and fuel cell stack, and connect the heat transfer circuit via the heat transfer jacket of the hydrogen circulation pump to the heating circuit.

[0054] Step 202: According to the target coolant temperature required for the start-up of the fuel cell system, control the heating circuit to raise the temperature of the coolant so that the current coolant temperature flowing through the stack and heat transfer jacket reaches the target coolant temperature, thereby enabling the hydrogen circulation pump and the stack to start up and operate successfully.

[0055] In this embodiment, 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 the start-up of the fuel cell system. The heater is controlled to operate according to the target operating power, and the cooling water pump is controlled to operate according to the target water pump speed, so that the heating circuit can heat up the coolant. This allows the hydrogen circulation pump and fuel cell stack to be successfully started when the current coolant temperature flowing through the stack and heat transfer jacket reaches the target coolant temperature.

[0056] During the cold start of a fuel cell system, by opening the heating circuit in the cooling system to connect the heat transfer circuit of the heat transfer jacket via the hydrogen circulation pump with the heating circuit, the coolant can be heated using the heating circuit in the cooling system. This allows the heated coolant to circulate in both the heat transfer circuit and the heating circuit, thereby enabling rapid heating of the fuel cell stack and the hydrogen circulation pump, which in turn improves the cold start performance of the fuel cell system. However, when the coolant temperature in the heat transfer circuit and heating circuit rises, the coolant inside the heat transfer jacket of the hydrogen circulation pump is at a high temperature. Sometimes, the coolant temperature inside the heat transfer jacket is higher than the hydrogen temperature inside the pump body. When the temperature difference between the coolant temperature inside the heat transfer jacket and the hydrogen temperature inside the pump body is too large, the low-temperature environment will cause an increase in condensate between the heat transfer jacket and the pump body inside the hydrogen circulation pump, which will then cause icing between the heat transfer jacket and the pump body. Since the icing point is opposite to the hydrogen pipeline of the hydrogen circulation pump, purging cannot be completed during the shutdown process of the fuel cell system, resulting in the problem of the hydrogen circulation pump icing again after the fuel cell system is shut down. To solve this technical problem, this application provides a fuel cell system control method during the hot shutdown process. See reference. Figure 3 As shown in the embodiments of this application, the general flow of the fuel cell system control method during the thermal shutdown process is as follows:

[0057] Step 301: During the thermal shutdown process of the fuel cell system, control the opening of the heat dissipation circuit in the cooling system of the fuel cell system so that the heat transfer circuit of the heat 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 this embodiment of the 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 via the cooling fan, coolant water pump and fuel cell stack, and connect the heat transfer circuit of the heat transfer jacket via the hydrogen circulation pump with the heat dissipation circuit.

[0059] Step 302: Based on the current hydrogen temperature flowing into the hydrogen circulation pump, control the heat dissipation circuit to cool the coolant, 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.

[0060] In this embodiment of the application, the fuel cell control device controls the heat dissipation circuit to cool the coolant according to the current hydrogen temperature flowing into the hydrogen circulation pump, 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 a target range. This can be achieved, but is not limited to, the following methods:

[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 hydrogen temperature flowing into the hydrogen circulation pump through a first temperature sensor installed 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 coolant temperature flowing through the heat transfer jacket through a second temperature sensor installed 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 equipment determines the target operating parameters corresponding to the current hydrogen temperature and the current coolant temperature; wherein the target operating parameters include at least the target fan speed and the target water pump speed.

[0064] Specifically, the fuel cell control device can 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 heat dissipation circuit and 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; and based on the pre-calibrated correspondence between the pump speed of the cooling water pump in the heat dissipation circuit and the hydrogen temperature flowing into the hydrogen circulation pump and the coolant temperature flowing through the heat transfer jacket, the pump speed corresponding to the current hydrogen temperature and the current coolant temperature is determined as the target pump speed of the cooling water pump.

[0066] The second method involves obtaining the target fan speed of the cooling fan in the heat dissipation circuit during the thermal shutdown process of the fuel cell system, where 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 heat dissipation circuit and the hydrogen temperature flowing into the hydrogen circulation pump and the coolant temperature flowing through the heat transfer jacket under the condition of the target fan speed, 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 involves obtaining the target water pump speed of the cooling water pump in the heat dissipation circuit during the pre-set thermal shutdown process of the fuel cell system. The target water pump speed can be a fixed speed, such as the maximum water pump speed. Based on the pre-calibrated correspondence between the fan speed of the cooling fan in the heat dissipation circuit under the target water pump speed and the temperature of the hydrogen flowing into the hydrogen circulation pump and the temperature of the coolant 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.

[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 as to reduce 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 to the target range.

[0069] Specifically, the fuel cell control device can control the operation of the cooling fan in the heat dissipation circuit based on the target fan speed, and control the operation of the cooling water pump in the heat dissipation circuit based on the target water pump speed, so as to reduce 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 to the target range through the heat dissipation circuit.

[0070] Furthermore, the fuel cell control device controls the cooling circuit to cool the coolant according to the current hydrogen temperature flowing into the hydrogen circulation pump. After 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, the cooling fan and cooling water pump can be shut down. In this embodiment, the coolant cooling strategy and the shutdown purging strategy are independent of each other. During the thermal shutdown of the fuel cell system, the coolant cooling strategy and the shutdown purging strategy are performed simultaneously. After both the coolant cooling strategy and the shutdown purging strategy are completed, the fuel cell system shutdown is completed.

[0071] The following specific embodiment will be used to further illustrate the fuel cell system control method provided in this application. See reference [link to relevant documentation]. Figure 4 As shown, the specific flow of the fuel cell system control method provided in this application embodiment is as follows:

[0072] Step 401: During the cold start process 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, coolant pump and stack, and connect the heat transfer circuit through the heat transfer jacket of 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 pump speed of the cooling water pump based on the target coolant temperature required for the start-up of the fuel cell system.

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

[0075] Step 404: During the thermal shutdown process 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, coolant water pump and fuel cell stack, and connect the heat transfer circuit of the heat transfer jacket through the hydrogen circulation pump with the heat dissipation circuit.

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

[0077] Step 406: The fuel cell control device controls the operation of the cooling fan in the heat dissipation circuit based on the target fan speed, and controls the operation of the cooling water pump in the heat dissipation circuit based on the target water pump speed, so as to reduce 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 to the target range through the heat dissipation circuit.

[0078] Step 407: The fuel cell control device shuts down the cooling fan and cooling water pump.

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

[0080] The loop control unit 501 is used to control the opening of the heat dissipation loop in the cooling system of the fuel cell system during the thermal shutdown process of the fuel cell system so that the heat transfer loop of the heat transfer jacket of the hydrogen circulation pump in the anode system of the fuel cell system is connected to the heat dissipation loop.

[0081] The temperature difference control unit 502 is used to control the heat dissipation circuit to cool the coolant according to the current hydrogen temperature flowing into the hydrogen circulation pump, 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 a target range.

[0082] In one possible implementation, 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; and to control 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 jacket and the current hydrogen temperature flowing into the hydrogen circulation pump is reduced to the target range.

[0083] In one possible implementation, the target operating parameters include the target fan speed and the 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 the pre-calibrated correspondence between the fan speed of the cooling fan in the heat dissipation circuit and the hydrogen temperature flowing into the hydrogen circulation pump and the coolant temperature flowing through the heat transfer jacket; and to 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 based on the pre-calibrated correspondence between the water pump speed of the cooling water pump in the heat dissipation circuit and the hydrogen temperature flowing into the hydrogen circulation pump and the coolant temperature flowing through the heat transfer jacket.

[0084] In one possible implementation, the target operating parameters include the target fan speed and the target water pump speed; the temperature difference control unit 502 is specifically used to acquire the target fan speed of the cooling fan in the heat dissipation circuit during the pre-set 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 heat dissipation 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 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 implementation, the target operating parameters include the target fan speed and the target water pump speed; the temperature difference control unit 502 is specifically used to acquire the target water pump speed of the cooling water pump in the heat dissipation circuit during the pre-set 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 temperature of the hydrogen flowing into the hydrogen circulation pump and the temperature of the coolant 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.

[0086] In one possible implementation, the target operating parameters include the target fan speed and the target water pump speed; the temperature difference control unit 502 is specifically used to control the operation of the cooling fan in the heat dissipation circuit based on the target fan speed, and to control the operation of the cooling water pump in the heat dissipation circuit based on the target water pump speed, so as to reduce 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 to the target range through the heat dissipation circuit.

[0087] In one possible implementation, the loop control unit 501 is also used to control the shutdown of the heat dissipation loop in the cooling system of the fuel cell system.

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

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

[0090] The fuel cell control device provided in this application embodiment may be, but is not limited to, a fuel cell controller (FCU) in a fuel cell system, etc. See [reference needed]. Figure 6 As shown, the fuel cell control device 600 provided in this application embodiment 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, it implements the above-described fuel cell system control method provided in this application embodiment.

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

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

[0093] Processor 601 can be a single processing element or a collective term for multiple processing elements. For example, processor 601 can 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 this application. Specifically, processor 601 can be a general-purpose processor, including but not limited to CPUs, application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), 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 allow users to interact with it (e.g., mobile phones, computers, etc.), and / or with various external devices 604 that enable it to communicate with one or more other fuel cell control devices (e.g., routers, modems, etc.). This communication can be performed via an input / output (I / O) interface 605. Furthermore, the fuel cell control device 600 can also communicate with one or more networks (e.g., local area networks (LANs), wide area networks (WANs), and / or public networks, such as the Internet) via a network adapter 606. Figure 6 As shown, network adapter 606 communicates with other modules of fuel cell control device 600 via bus 603. It should be understood that, although... Figure 6 As not shown, other hardware and / or software modules can 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, 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 impose any limitations on the functionality and scope of use of the embodiments of this application.

[0096] Furthermore, this application also provides a computer-readable storage medium storing computer instructions that, when executed by a processor, implement the fuel cell system control method provided in this application. Specifically, the computer instructions can be built into or installed in a processor, so that the processor can implement the aforementioned fuel cell system control method provided in this application by executing the built-in or installed computer instructions.

[0097] Furthermore, the fuel cell system control method provided in this application embodiment 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 this application embodiment.

[0098] The program product provided in this application embodiment can be any combination of one or more readable media, wherein the readable media can be a readable signal medium or a readable storage medium, and the readable storage medium can be, but is not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or apparatus, or any combination thereof. Specifically, more specific examples of readable storage media (a non-exhaustive list) include electrical connections with one or more wires, portable disks, hard disks, RAM, ROM, erasable programmable read-only memory (EPROM), optical fibers, portable compact disc read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0099] The program product provided in this application embodiment can be a CD-ROM and include program code, and can also run on fuel cell control devices such as FCUs. However, the program product provided in this application embodiment is not limited to this. In this application embodiment, the readable storage medium can be any tangible medium that contains or stores a program, which can be used by or in conjunction with an instruction execution system, device, or apparatus.

[0100] It should be noted that although several units or sub-units of the device have been mentioned in the detailed description above, this division is merely exemplary and not mandatory. In fact, according to embodiments of this application, the features and functions of two or more units described above can be embodied in one unit. Conversely, the features and functions of one unit described above can be further divided and embodied by multiple units.

[0101] Furthermore, although the operations of the method of this application are described in a specific order in the accompanying drawings, this does not require or imply that these operations must be performed in that specific order, or that all the operations shown must be performed to achieve the desired result. Additionally or alternatively, certain steps may be omitted, multiple steps may be combined into one step, and / or one step may be broken down into multiple steps.

[0102] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

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

Claims

1. A control method for a fuel cell system, characterized in that, The cooling system in the fuel cell system includes at least a cooling bypass valve, a cooling fan, a cooling water pump, and a heater; the cooling bypass valve, cooling fan, and cooling water pump form a heat dissipation circuit; the cooling bypass valve, heater, and cooling water pump form a heating circuit; the control method of the fuel cell system includes: During the thermal shutdown process of the fuel cell system, the heat dissipation circuit in the cooling system of the fuel cell system is opened to connect the heat transfer circuit of the heat transfer jacket of the hydrogen circulation pump in the anode system of the fuel cell system with the heat dissipation circuit. According to the current hydrogen temperature flowing into the hydrogen circulation pump, the heat dissipation circuit is controlled to cool the coolant 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. Specifically, controlling the heat dissipation circuit to cool the coolant according to the current hydrogen temperature flowing into the hydrogen circulation pump, so as to reduce 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 to a target range, includes: Determine the target operating parameters corresponding to the current hydrogen temperature and the current coolant temperature; According to the target operating parameters, control the operation of the heat dissipation circuit to reduce 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 to the target range. The target operating parameters include the target fan speed and the target water pump speed. Controlling the heat dissipation circuit according to the target operating parameters reduces 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 to a target range, including: The cooling fan in the heat dissipation circuit is controlled to operate based on the target fan speed, and the cooling water pump in the heat dissipation circuit is controlled to operate based on the target water pump speed, so as to reduce 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 to the target range through the heat dissipation circuit.

2. The fuel cell system control method as described in claim 1, characterized in that, The target operating parameters include the target fan speed and the target water pump speed; determining the target operating parameters corresponding to the current hydrogen temperature and the current coolant temperature includes: Based on the pre-calibrated correspondence between the fan speed of the cooling fan in the heat dissipation circuit and 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. Based on the pre-calibrated correspondence between the pump speed of the cooling water pump in the heat dissipation circuit and the temperature of the hydrogen flowing into the hydrogen circulation pump and the temperature of the coolant flowing through the heat transfer jacket, the pump speed corresponding to the current hydrogen temperature and the current coolant temperature is determined as the target pump speed of the cooling water pump.

3. The fuel cell system control method as described in claim 1, characterized in that, The target operating parameters include the target fan speed and the target water pump speed; determining the target operating parameters corresponding to the current hydrogen temperature and the current coolant temperature includes: Obtain the target fan speed of the cooling fan in the heat dissipation circuit during the pre-set thermal shutdown process of the fuel cell system; Based on the pre-calibrated correspondence between the pump speed of the cooling water pump in the heat dissipation circuit and the temperature of the hydrogen flowing into the hydrogen circulation pump and the temperature of the coolant flowing through the heat transfer jacket under the condition of the target fan speed, the pump speed corresponding to the current hydrogen temperature and the current coolant temperature is determined as the target pump speed of the cooling water pump.

4. The fuel cell system control method as described in claim 1, characterized in that, The target operating parameters include the target fan speed and the target water pump speed; determining the target operating parameters corresponding to the current hydrogen temperature and the current coolant temperature includes: Obtain the target water pump speed of the cooling water pump in the heat dissipation circuit during the pre-set 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 and the temperature of the hydrogen flowing into the hydrogen circulation pump and the temperature of the coolant flowing through the heat transfer jacket under the condition of the target water pump speed, 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.

5. The fuel cell system control method as described in claim 1, characterized in that, Based on the current hydrogen temperature flowing into the hydrogen circulation pump, the heat dissipation circuit is controlled to cool the coolant 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 a target range. The process further includes: Control the shutdown of the heat dissipation circuit within the cooling system of the fuel cell system.

6. A fuel cell system control device, characterized in that, For implementing the fuel cell system control method as described in any one of claims 1-5; the fuel cell system control device includes: A loop control unit is used to control the opening of the heat dissipation loop in the cooling system of the fuel cell system during the thermal shutdown process of the fuel cell system so that the heat transfer loop of the heat transfer water jacket of the hydrogen circulation pump in the anode system of the fuel cell system is connected to the heat dissipation loop. The temperature difference control unit is used to control the heat dissipation circuit to cool the coolant according to the current hydrogen temperature flowing into the hydrogen circulation pump, 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 a target range.

7. A fuel cell control device, characterized in that, It includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the fuel cell system control method as described in any one of claims 1-5.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that, when executed by a processor, implement the fuel cell system control method as described in any one of claims 1-5.

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