Integrated hydrogen circulation system, control method and control device thereof and electronic equipment

Abstract

The present invention relates to the technical field of fuel cells, and discloses an integrated hydrogen circulation system, a control method and a control device thereof, and an electronic device, the system comprises: an integrated housing, the integrated housing comprises an upper ejector housing and a lower water segregator housing; a hydrogen pump is arranged at the top end in the ejector shell, a hydrogen circulating device is arranged in the ejector shell, a gas-liquid separation cavity is formed between the hydrogen circulating device and the ejector shell, the hydrogen pump is communicated with the top end of the hydrogen circulating device, a circulating hydrogen inlet is formed in the bottom of the hydrogen circulating device, and an ejector is arranged on the side face of the ejector shell. The ejector is communicated with the hydrogen pump; a water storage cavity is formed in the water segregator shell, a drain valve is arranged at the bottom of the water storage cavity, and an exhaust valve is arranged on the side face of the water segregator shell. The system provided by the invention can realize heat preservation of the hydrogen pump in a low-temperature environment, saves the arrangement space, reduces the risk of gas leakage, and ensures the coverage range of the hydrogen cycle power of the high-power fuel cell.

Description

Technical Field

[0001] The present invention relates to the field of fuel cell technology, and in particular to an integrated hydrogen circulation system, a control method for an integrated hydrogen circulation system, a control device for an integrated hydrogen circulation system, an electronic device, and a computer-readable storage medium. Background Art

[0002] The fuel cell engine system mainly consists of an air supply subsystem, a hydrogen circulation supply subsystem, a cooling system, a fuel cell stack, a DC-DC converter, etc. The hydrogen circulation supply subsystem is an important subsystem to ensure hydrogen transmission. In order to improve the reaction efficiency of the fuel cell and the response rate during dynamic rapid loading, it is often necessary to introduce an excess of hydrogen into the anode side of the fuel cell stack. After the reaction is completed, it is discharged from the outlet on the anode side of the fuel cell stack. At this time, the discharged substances contain not only a small amount of impurity gas and water, but also some incompletely reacted hydrogen. At this time, this part of hydrogen needs to be circulated to the inlet on the anode side of the fuel cell stack to participate in the reaction again. To achieve this function, the hydrogen circulation supply system needs to use a hydrogen circulation pump or ejector to circulate hydrogen. After the reaction in the fuel cell stack is completed, the mixed gas needs to separate the water vapor before entering the ejector and hydrogen circulation pump. The separation process generally uses a gas-liquid separator. A drain valve is also required at the bottom of the hydrogen circulation circuit to drain any accumulated liquid water. If this is not done, the accumulated liquid water will flow into the fuel cell stack through the hydrogen circulation pump, causing flooding. A nitrogen drain valve is also required in the hydrogen circulation circuit of the fuel cell system. It should be opened regularly to drain the mixed gas and maintain the hydrogen concentration in the hydrogen circulation circuit.

[0003] In related technologies, the gas-liquid separator, ejector, and hydrogen circulation pump are generally designed as separate components. Each component is connected by pipes, resulting in long transmission distances, increased gas pressure loss, and a large space occupation. The pipe design is complex, and improper layout can cause liquid water to remain inside the hydrogen circulation pump when the system is shut down. When the temperature drops below zero degrees Celsius, liquid water easily freezes, causing the hydrogen circulation pump to malfunction. Furthermore, hydrogen fuel cells are developing toward high-power systems, employing a dual-stack design. This requires the hydrogen circulation to cover an increasingly wide power range. Neither a single hydrogen circulation pump solution nor a single ejector solution can meet current hydrogen circulation power requirements. Summary of the Invention

[0004] The present invention aims to at least partially address one of the technical problems in the related art. To this end, a first object of the present invention is to provide an integrated hydrogen circulation system that can address the problems of low integration, excessive volume, high pressure loss, and poor control accuracy in fuel cell systems. This system can insulate the hydrogen pump in low-temperature environments, save layout space, reduce the number of components, lower pressure loss, and mitigate the risk of leakage, while ensuring the coverage of the hydrogen circulation power of high-power fuel cells.

[0005] The second object of the present invention is to provide a control method for an integrated hydrogen circulation system.

[0006] The third object of the present invention is to provide a control device for an integrated hydrogen circulation system.

[0007] A fourth object of the present invention is to provide an electronic device.

[0008] A fifth object of the present invention is to provide a computer-readable storage medium.

[0009] To achieve the above-mentioned objectives, an embodiment of the first aspect of the present invention proposes an integrated hydrogen circulation system, comprising: an integrated shell, the integrated shell comprising an upper ejector shell and a lower water separator shell; a hydrogen pump is provided at the top of the ejector shell, a hydrogen circulation device is provided in the ejector shell, a gas-liquid separation chamber is formed between the hydrogen circulation device and the ejector shell, the hydrogen pump is connected to the top of the hydrogen circulation device, a circulating hydrogen inlet is provided at the bottom of the hydrogen circulation device, an ejector is provided on the side of the ejector shell, and the ejector is connected to the hydrogen pump; a water storage chamber is provided inside the water separator shell, a drain valve is provided at the bottom of the water storage chamber, and an exhaust valve is provided on the side of the water separator shell.

[0010] In addition, the integrated hydrogen circulation system according to the above embodiment of the present invention may also have the following additional technical features:

[0011] According to some embodiments of the present invention, a circulating liquid flow channel is provided between the hydrogen pump and the ejector housing, and a circulating liquid inlet and a circulating liquid outlet are provided on the side of the ejector housing.

[0012] According to some embodiments of the present invention, the ejector includes a first ejector and a second ejector, the first ejector is provided with a first control valve, and the second ejector is provided with a second control valve.

[0013] According to some embodiments of the present invention, a mixing discharge valve is further provided at the bottom of the water storage chamber, and an inlet of the mixing discharge valve is connected to the drain valve and the exhaust valve.

[0014] According to an embodiment of the present invention, the integrated hydrogen circulation system comprises: an integrated shell, the integrated shell comprising an upper ejector shell and a lower water separator shell; a hydrogen pump is provided at the top of the ejector shell, a hydrogen circulation device is provided in the ejector shell, a gas-liquid separation chamber is formed between the hydrogen circulation device and the ejector shell, the hydrogen pump is connected to the top of the hydrogen circulation device, a circulating hydrogen inlet is provided at the bottom of the hydrogen circulation device, an ejector is provided on the side of the ejector shell, the ejector is connected to the hydrogen pump; a water storage chamber is provided inside the water separator shell, a drain valve is provided at the bottom of the water storage chamber, and an exhaust valve is provided on the side of the water separator shell. Thus, the system can solve the problems of low integration, large space volume, large pressure loss and poor control accuracy of the hydrogen circulation system in the fuel cell system, and can realize the heat preservation of the hydrogen pump in a low temperature environment, save layout space, reduce the number of components, reduce pressure loss, reduce the risk of leakage, and ensure the coverage of the hydrogen circulation power of the high-power fuel cell.

[0015] The second purpose of the present invention is to propose a control method for an integrated hydrogen circulation system, which can solve the problems of large pressure loss and poor control accuracy of the hydrogen circulation system in the fuel cell system. It can more accurately control the intake flow and intake pressure of the fuel cell stack, so that the water content in the proton exchange membrane of the fuel cell stack meets the set requirements, and realize the insulation of the hydrogen pump in a low-temperature environment, reduce pressure loss, reduce the risk of leakage, and ensure the coverage range of the hydrogen circulation power of the high-power fuel cell.

[0016] To achieve the above-mentioned purpose, the second embodiment of the present invention proposes a control method for an integrated hydrogen circulation system, which is applied to the above-mentioned integrated hydrogen circulation system. The above-mentioned method includes: determining whether the required hydrogen flow rate of the fuel cell is lower than a preset flow rate threshold, and in response to the required hydrogen flow rate of the fuel cell being lower than the preset flow rate threshold, starting the first control valve to open the first ejector or starting the second control valve to open the second ejector; detecting whether the water content in the proton exchange membrane of the fuel cell is lower than the preset water content threshold, and in response to the water content being lower than the preset water content threshold and the cell voltage of the fuel cell being not greater than the first preset voltage, closing the flow valve at the circulating liquid inlet; continuing to detect the cell voltage of the fuel cell, and in response to the cell voltage of the fuel cell being greater than the first preset voltage and the cell voltage of the fuel cell being consistent with the voltage under the output power of the current fuel cell engine, opening the flow valve at the circulating liquid inlet.

[0017] In addition, the control method of the integrated hydrogen circulation system according to the above embodiment of the present invention may also have the following additional technical features:

[0018] According to some embodiments of the present invention, after detecting whether the water content in the proton exchange membrane of the fuel cell stack is not greater than a preset water content threshold, the above method also includes: in response to the water content being greater than the preset water content threshold, starting the flow valve at the circulating liquid inlet and the PTC heater of the fuel cell stack, and detecting the cell voltage of the fuel cell stack; in response to the cell voltage being greater than a second preset voltage and the cell voltage of the fuel cell stack being consistent with the voltage under the output power of the current fuel cell stack engine, turning off the PTC heater of the fuel cell stack and controlling the flow valve to enter automatic control mode.

[0019] According to some embodiments of the present invention, the above method also includes: in response to the hydrogen flow rate required by the fuel cell stack being higher than a preset flow rate threshold, starting the first control valve to open the first ejector and starting the second control valve to open the second ejector; detecting whether the water content in the proton exchange membrane of the fuel cell stack is lower than the preset water content threshold, and in response to the water content being lower than the preset water content threshold and the cell voltage of the fuel cell stack being not greater than a second preset voltage, closing the flow valve at the circulating liquid inlet; continuing to detect the cell voltage of the fuel cell stack, and in response to the cell voltage of the fuel cell stack being greater than the second preset voltage and the cell voltage of the fuel cell stack being consistent with the voltage under the output power of the current fuel cell stack engine, opening the flow valve at the circulating liquid inlet.

[0020] According to an embodiment of the present invention, a control method for an integrated hydrogen circulation system includes: determining whether the required hydrogen flow of the fuel cell stack is lower than a preset flow threshold, and in response to the required hydrogen flow of the fuel cell stack being lower than the preset flow threshold, starting the first control valve to open the first ejector or starting the second control valve to open the second ejector; detecting whether the water content in the proton exchange membrane of the fuel cell stack is lower than the preset water content threshold, and in response to the water content being lower than the preset water content threshold and the cell voltage of the fuel cell stack being not greater than a first preset voltage, closing the flow valve at the circulating liquid inlet; continuing to detect the cell voltage of the fuel cell stack, and in response to the cell voltage of the fuel cell stack being greater than the first preset voltage and the cell voltage of the fuel cell stack being consistent with the voltage under the output power of the current fuel cell stack engine, opening the flow valve at the circulating liquid inlet. Therefore, this method can solve the problems of large pressure loss and poor control accuracy of the hydrogen circulation system in the fuel cell system. It can more accurately control the intake flow and intake pressure of the fuel cell stack, so that the water content in the proton exchange membrane of the fuel cell stack meets the set requirements, and realize the insulation of the hydrogen pump in a low-temperature environment, reduce pressure loss, reduce the risk of leakage, and ensure the coverage range of the hydrogen circulation power of the high-power fuel cell.

[0021] The third purpose of the present invention is to propose a control device for an integrated hydrogen circulation system, which can solve the problems of large pressure loss and poor control accuracy of the hydrogen circulation system in the fuel cell system. It can more accurately control the intake flow and intake pressure of the fuel cell stack, so that the water content in the proton exchange membrane of the fuel cell stack meets the set requirements, and realize the insulation of the hydrogen pump in a low-temperature environment, reduce pressure loss, reduce the risk of leakage, and ensure the coverage range of the hydrogen circulation power of the high-power fuel cell.

[0022] To achieve the above-mentioned objectives, the third embodiment of the present invention proposes a control device for an integrated hydrogen circulation system, comprising: a determination module, configured to determine whether the required hydrogen flow of the fuel cell stack is lower than a preset flow threshold, and in response to the required hydrogen flow of the fuel cell stack being lower than the preset flow threshold, starting the first control valve to open the first ejector or starting the second control valve to open the second ejector; a detection module, configured to detect whether the water content in the proton exchange membrane of the fuel cell stack is lower than the preset water content threshold, and in response to the water content being lower than the preset water content threshold and the cell voltage of the fuel cell stack being not greater than the first preset voltage, closing the flow valve at the circulating liquid inlet; a control module, configured to continue detecting the cell voltage of the fuel cell stack, and in response to the cell voltage of the fuel cell stack being greater than the first preset voltage and the cell voltage of the fuel cell stack being consistent with the voltage under the output power of the current fuel cell stack engine, opening the flow valve at the circulating liquid inlet.

[0023] According to an embodiment of the present invention, the control device of the integrated hydrogen circulation system includes: a determination module, configured to determine whether the required hydrogen flow of the fuel cell stack is lower than a preset flow threshold, and in response to the required hydrogen flow of the fuel cell stack being lower than the preset flow threshold, starting the first control valve to open the first ejector or starting the second control valve to open the second ejector; a detection module, configured to detect whether the water content in the proton exchange membrane of the fuel cell stack is lower than the preset water content threshold, and in response to the water content being lower than the preset water content threshold and the cell voltage of the fuel cell stack being not greater than the first preset voltage, closing the flow valve at the circulating liquid inlet; a control module, configured to continue detecting the cell voltage of the fuel cell stack, and in response to the cell voltage of the fuel cell stack being greater than the first preset voltage and the cell voltage of the fuel cell stack being consistent with the voltage under the output power of the current fuel cell stack engine, opening the flow valve at the circulating liquid inlet. Therefore, this device can solve the problems of large pressure loss and poor control accuracy of the hydrogen circulation system in the fuel cell system. It can more accurately control the intake flow and intake pressure of the fuel cell stack, so that the water content in the proton exchange membrane of the fuel cell stack meets the set requirements, and realize the insulation of the hydrogen pump in a low-temperature environment, reduce pressure loss, reduce the risk of leakage, and ensure the coverage of the hydrogen circulation power of the high-power fuel cell.

[0024] To achieve the above-mentioned objectives, an embodiment of the fourth aspect of the present invention proposes an electronic device, comprising: a processor and a memory, the memory storing programs or instructions that can be run on the processor, and the steps of the control method of the above-mentioned integrated hydrogen circulation system are implemented when the program or instructions are executed by the processor.

[0025] According to the electronic device of an embodiment of the present invention, by executing the above-mentioned control method of the integrated hydrogen circulation system, it is possible to solve the problems of large pressure loss and poor control accuracy of the hydrogen circulation system in the fuel cell system, and can more accurately control the intake flow and intake pressure of the fuel cell stack, so that the water content in the proton exchange membrane of the fuel cell stack meets the set requirements, and realize the insulation of the hydrogen pump in a low-temperature environment, reduce pressure loss, reduce the risk of leakage, and ensure the coverage range of the hydrogen circulation power of the high-power fuel cell.

[0026] To achieve the above-mentioned purpose, the fifth embodiment of the present invention proposes a computer-readable storage medium, characterized in that a program or instruction is stored on the readable storage medium, and when the program or instruction is executed by the processor, the steps of the control method of the above-mentioned integrated hydrogen circulation system are implemented.

[0027] According to the computer-readable storage medium of an embodiment of the present invention, by executing the above-mentioned control method of the integrated hydrogen circulation system, it is possible to solve the problems of large pressure loss and poor control accuracy of the hydrogen circulation system in the fuel cell system, and the intake flow and intake pressure of the fuel cell stack can be controlled more accurately, so that the water content in the proton exchange membrane of the fuel cell stack meets the set requirements, and the hydrogen pump can be kept warm in a low-temperature environment, reducing pressure loss and the risk of leakage, thereby ensuring the coverage range of the hydrogen circulation power of the high-power fuel cell.

[0028] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a block diagram of an integrated hydrogen circulation system according to some embodiments of the present invention;

[0030] Figure 2 is a top view schematically cut away diagram of a secondary flow of a hydrogen cycle according to some embodiments of the present invention;

[0031] Figure 3 is a schematic front view cutaway diagram of a secondary flow of a hydrogen cycle according to some embodiments of the present invention;

[0032] Figure 4 is a cross-sectional schematic diagram of an exhaust valve and a drain valve according to some embodiments of the present invention;

[0033] Figure 5is a schematic diagram of a circulating liquid flow channel according to some embodiments of the present invention;

[0034] Figure 6 is a schematic diagram of an ejector flow channel according to some embodiments of the present invention;

[0035] Figure 7 is a flow chart of a control method of an integrated hydrogen circulation system according to some embodiments of the present invention;

[0036] Figure 8 is a flow chart of a control method of an integrated hydrogen circulation system according to other embodiments of the present invention;

[0037] Figure 9 is a flow chart of a control method of an integrated hydrogen circulation system according to yet other embodiments of the present invention;

[0038] Figure 10 is a block diagram of a control device of an integrated hydrogen circulation system according to some embodiments of the present invention;

[0039] Figure 11 is a block diagram of an electronic device according to some embodiments of the present invention.

[0040] Description of reference numerals:

[0041] 100-hydrogen circulation system, 10-ejector housing, 11-water separator housing, 12-secondary flow gas inlet, 13-ejector outlet, 14-primary flow gas inlet, 15-exhaust and drainage outlet, 16-process pressure plate, 17-hydrogen pump, 18-hydrogen circulation device, 19-gas-liquid separation chamber, 20-first ejector, 21-second ejector, 22-water storage chamber, 23-drain valve, 24-exhaust valve, 25-circulating liquid flow channel, 26-circulating liquid inlet, 27-circulating liquid outlet, 28-flow valve, 29-temperature sensor, 30-first control valve, 31-second control valve. DETAILED DESCRIPTION

[0042] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0043] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present invention should have the usual meanings understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the embodiments of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0044] As mentioned in the background technology section, the fuel cell engine system is mainly composed of an air supply subsystem, a hydrogen circulation supply subsystem, a cooling system, a stack, a DC-DC converter, etc. The hydrogen circulation supply subsystem is an important subsystem to ensure hydrogen transmission. In order to improve the reaction efficiency of the fuel cell and the response rate during dynamic rapid loading, it is often necessary to introduce an excess of hydrogen into the anode side of the stack, and discharge it from the outlet on the anode side of the stack after the reaction is completed. At this time, the discharged substances contain not only a small amount of impurity gas and water, but also some incompletely reacted hydrogen. At this time, this part of hydrogen needs to be circulated to the inlet on the anode side of the stack to participate in the reaction again. To achieve this function, the hydrogen circulation supply system needs to use a hydrogen circulation pump or ejector to circulate hydrogen. After the reaction in the stack is completed, the mixed gas needs to separate the water vapor before entering the ejector and the hydrogen circulation pump. The separation process generally uses a gas-liquid separator. A drain valve is also required at the bottom of the hydrogen circulation circuit to drain any accumulated liquid water. If this is not done, the accumulated liquid water will flow into the fuel cell stack through the hydrogen circulation pump, causing flooding. A nitrogen drain valve is also required in the hydrogen circulation circuit of the fuel cell system. It should be opened regularly to drain the mixed gas and maintain the hydrogen concentration in the hydrogen circulation circuit.

[0045] In the process of realizing the present invention, the applicant discovered that in the related art, the gas-liquid separator, the ejector, and the hydrogen circulation pump are generally designed in a separate arrangement, and the various components are connected by pipelines. The transmission distance is long, which easily increases the gas pressure loss, occupies a large space, and the pipeline design is complex. If the layout is unreasonable, liquid water will remain inside the hydrogen circulation pump when the system is shut down. When the temperature drops to below zero degrees Celsius, liquid water easily freezes, causing the hydrogen circulation pump to malfunction. In addition, hydrogen fuel cells are developing towards high-power systems, using a dual-stack design, requiring the power coverage of the hydrogen cycle to be larger and larger. The use of a single hydrogen circulation pump solution or a single ejector solution cannot meet the current hydrogen circulation power requirements.

[0046] Specifically, the degree of integration between the cyclone gas-liquid separator and the hydrogen circulation pump is low. The hydrogen circulation pump and the cyclone gas-liquid separator are designed and arranged separately, which occupies a relatively large space and has poor overall thermal insulation effect, which will reduce the system efficiency under low-temperature conditions. For the dual-stack system, when only a single hydrogen circulation pump and a single ejector are used, the power range of the hydrogen circulation system is too small to meet the performance of the dual-stack system, and the series mode of the single hydrogen circulation pump and the single ejector cannot accurately control the intake pressure and flow of the two stacks.

[0047] Therefore, the present invention can solve the problems of low integration, excessive space, high pressure loss, and poor control accuracy of the hydrogen circulation system in the fuel cell system in the integrated hydrogen circulation system. It can achieve the insulation of the hydrogen pump in a low-temperature environment, save layout space, reduce the number of components, reduce pressure loss, reduce the risk of leakage, and ensure the coverage of the hydrogen circulation power of high-power fuel cells. The present invention can more accurately control the intake flow rate and intake pressure of the fuel cell stack in the control method of the integrated hydrogen circulation system, so that the water content in the proton exchange membrane of the fuel cell stack meets the set requirements.

[0048] The following describes an integrated hydrogen circulation system, a control method for an integrated hydrogen circulation system, a control device for an integrated hydrogen circulation system, an electronic device, and a storage medium according to embodiments of the present invention with reference to the accompanying drawings.

[0049] refer to Figure 1 , is a block diagram of an integrated hydrogen circulation system according to some embodiments of the present invention.

[0050] The integrated hydrogen circulation system 100 of the present invention includes an integrated housing, which further includes an upper ejector housing 10 and a lower water separator housing 11 .

[0051] Furthermore, a secondary flow gas inlet 12 , an ejector outlet 13 , a primary flow gas inlet 14 and an exhaust and drainage outlet 15 are provided on the side of the ejector housing 10 , and a process pressure plate 16 is provided on the top outer end of the ejector housing 10 .

[0052] refer to Figure 2 , which is a top view schematic cross-sectional diagram of the secondary flow of hydrogen circulation according to some embodiments of the present invention, and with reference to Figure 3 , is a schematic front view cross-sectional diagram of a hydrogen circulation secondary flow according to some embodiments of the present invention. A hydrogen pump 17 is disposed at the top of the ejector housing 10. A hydrogen circulation device 18 is disposed within the ejector housing 10. A gas-liquid separation chamber 19 is formed between the hydrogen circulation device 18 and the ejector housing 10. The hydrogen pump 17 is connected to the top of the hydrogen circulation device 18. A circulating hydrogen inlet is provided at the bottom of the hydrogen circulation device 18 to allow the circulating hydrogen to enter the hydrogen pump 17. An ejector is disposed on the side of the ejector housing 10 and is connected to the hydrogen pump 17. The gas-liquid separation chamber 19 is circular and located outside the hydrogen pump 17.

[0053] Preferably, the gas-liquid separation chamber 19 can be a cyclone type gas-liquid separation chamber. The cyclone type gas-liquid separation chamber generates a strong centrifugal force in the cyclone chamber by utilizing the high-speed rotating gas-liquid mixed fluid, so that the liquid (oil, water, etc.) is thrown to the wall and collected and discharged, and the gas flows out from the center, with high separation efficiency.

[0054] Further, refer to Figure 4 , is a schematic cross-sectional view of an exhaust valve and a drain valve according to some embodiments of the present invention. A water storage chamber 22 is provided within the manifold housing 11, a drain valve 23 is provided at the bottom of the water storage chamber 22, and an exhaust valve 24 is provided on the side of the manifold housing 11. The water storage chamber 22 may be a water tank, and the exhaust valve 24 may be a nitrogen exhaust valve. A mixed exhaust valve is also provided at the bottom of the water storage chamber 22. The inlet of the mixed exhaust valve is connected to the drain valve 23 and the exhaust valve 24, that is, the drainage channel and the exhaust channel are connected to the mixed exhaust channel. The water in the drainage channel and the gas in the exhaust channel merge in the mixed exhaust channel and are discharged outward. By arranging the drain valve 23, the exhaust valve 24, and the mixed exhaust valve on the manifold housing 11, the structure is compact and the integration is high, which saves piping layout and reduces the probability of gas leakage.

[0055] Specifically, continue to refer to Figure 2 and Figure 3 The arrow indicates the flow direction of the mixed gas. After the secondary gas enters the cyclonic gas-liquid separation chamber 19, the mixed gas spirals downward and then upward through the upper outlet (which also serves as the hydrogen pump 17 inlet). The separated liquid water flows under gravity into the water storage chamber 22 below, thus separating the mixed gas and liquid water. The cyclonic gas-liquid separation chamber 19 surrounds the hydrogen pump 17, which not only insulates the hydrogen pump 17 in low-temperature environments but also saves layout space and reduces the number of components.

[0056] refer to Figure 5, is a schematic diagram of a circulating liquid flow channel according to some embodiments of the present invention, a circulating liquid flow channel 25 is provided between the hydrogen pump 17 and the ejector housing 10, wherein the circulating liquid flow channel 25 may be a water jacket, and a circulating liquid inlet 26 and a circulating liquid outlet 27 are provided on the side of the ejector housing 10, wherein a flow valve 28 is provided at the circulating liquid inlet 26, and a temperature sensor 29 is provided at the circulating liquid outlet 27.

[0057] Specifically, a circulating liquid channel 25 is arranged above the cyclonic gas-liquid separation chamber 19 and outside the pump body of the hydrogen pump 17. Circulating liquid flows through the circulating liquid channel 25. When the temperature sensor 29 detects a low-temperature environment or low-temperature startup, the circulating liquid channel 25 can heat and defrost the pump body of the hydrogen pump 17. It can also heat or cool the cyclonic gas-liquid separation chamber 19 to control the temperature and, consequently, the humidity of the gas within the cyclonic gas-liquid separation chamber 19.

[0058] The ejector includes a first ejector 20 and a second ejector 21 . The first ejector 20 is provided with a first control valve 30 , and the second ejector 21 is provided with a second control valve 31 .

[0059] Specifically, refer to Figure 6 , a schematic diagram of the ejector flow path according to some embodiments of the present invention. A first ejector 20 and a second ejector 21 are arranged outside the pump body of the hydrogen pump 17. The flow path is split within the pump body of the hydrogen pump 17, entering the first ejector 20 and the second ejector 21 respectively. No intermediate piping is required, which reduces pressure loss and the risk of gas leakage while also making the space layout more compact. The hydrogen circulation design using dual ejectors and a hydrogen pump 17 ensures the coverage of the hydrogen cycle power of the high-power fuel cell and improves the overall pressure rise. At the same time, the two ejectors, combined with the two control valves, can more accurately control the fuel cell stack's intake flow rate and intake pressure.

[0060] In summary, the integrated hydrogen circulation system according to the embodiment of the present invention includes: an integrated shell, the integrated shell includes an upper ejector shell and a lower water separator shell; a hydrogen pump is provided at the top of the ejector shell, a hydrogen circulation device is provided in the ejector shell, a cyclone gas-liquid separation chamber is formed between the hydrogen circulation device and the ejector shell, the hydrogen pump is connected to the top of the hydrogen circulation device, a circulating hydrogen inlet is provided at the bottom of the hydrogen circulation device, an ejector is provided on the side of the ejector shell, and the ejector is connected to the hydrogen pump; a water storage chamber is provided inside the water separator shell, a drain valve is provided at the bottom of the water storage chamber, and an exhaust valve is provided on the side of the water separator shell. Therefore, the system can solve the problems of low integration, large space volume, large pressure loss and poor control accuracy of the hydrogen circulation system in the fuel cell system, and can realize the insulation of the hydrogen pump in a low temperature environment, save layout space, reduce the number of components, reduce pressure loss, reduce the risk of leakage, and ensure the coverage of the hydrogen circulation power of the high-power fuel cell.

[0061] refer to Figure 7 , which is a flow chart of a control method for an integrated hydrogen circulation system according to some embodiments of the present invention.

[0062] like Figure 7 As shown, the control method of the integrated hydrogen circulation system according to the embodiment of the present invention may include the following steps:

[0063] S701, determine whether the required hydrogen flow rate of the fuel cell is lower than the preset flow rate threshold, and in response to the required hydrogen flow rate of the fuel cell being lower than the preset flow rate threshold, start the first control valve to open the first ejector or start the second control valve to open the second ejector, wherein the preset flow rate threshold can be calibrated according to actual conditions.

[0064] Specifically, the required hydrogen flow rate of the fuel cell stack is obtained to determine whether the required hydrogen flow rate of the fuel cell stack is lower than the preset flow rate threshold. When the required hydrogen flow rate of the fuel cell stack is lower than the preset flow rate threshold and when the output power of the fuel cell engine is relatively small, it can be said that the required hydrogen flow rate is relatively low. At this time, the first control valve is started to open the first ejector or the second control valve is started to open the second ejector. It can be understood that any one of the control valves can be started, the fuel cell engine starts to run, and the hydrogen pump starts to work at the same time.

[0065] S702, detect whether the water content in the proton exchange membrane of the fuel cell stack is lower than the preset water content threshold, and in response to the water content being lower than the preset water content threshold and the cell voltage of the fuel cell stack being no greater than a first preset voltage, close the flow valve at the circulating liquid inlet, wherein the preset water content threshold and the first preset voltage can be calibrated according to actual conditions, for example, the first preset voltage can be 0.35V.

[0066] Specifically, during the operation of the fuel cell engine, the water content in the proton exchange membrane of the fuel stack is determined based on parameters such as the cell voltage, cell impedance, inlet and outlet humidity of the entire battery pack, and dew point temperature in the fuel stack. It is detected whether the water content in the proton exchange membrane of the fuel stack is lower than a preset water content threshold. When the water content is lower than the preset water content threshold, it can be said that the proton exchange membrane is relatively dry. It is judged whether the cell voltage of the fuel stack is not greater than a first preset voltage. When the cell voltage of the fuel stack is not greater than the first preset voltage, the flow valve at the circulating liquid inlet is closed. At this time, since the circulating liquid no longer heats the secondary flow gas, the secondary flow gas begins to cool down. Therefore, the secondary flow gas temperature of the integrated hydrogen circulation system decreases. When the secondary flow gas temperature reaches the dew point temperature, liquid water is generated. After the liquid water is mixed with the primary flow gas, the humidity of the primary flow gas of the fuel stack increases, and the water content in the proton exchange membrane increases.

[0067] S703, continue to detect the cell voltage of the fuel cell stack, and in response to the cell voltage of the fuel cell stack being greater than the first preset voltage and the cell voltage of the fuel cell stack meeting the voltage under the output power of the current fuel cell stack engine, open the flow valve of the circulating liquid inlet.

[0068] Specifically, the voltage sensor provided on the fuel cell stack can be used to continuously detect the cell voltage of the fuel cell stack to determine whether the cell voltage of the fuel cell stack is greater than a first preset voltage. When the cell voltage of the fuel cell stack is greater than the first preset voltage, it is determined whether the cell voltage of the fuel cell stack meets the voltage under the output power of the current fuel cell stack engine. When the cell voltage of the fuel cell stack does not meet the voltage under the output power of the current fuel cell stack engine, it can be indicated that the water content in the proton exchange membrane of the fuel cell stack is low and the proton exchange membrane of the fuel cell stack needs to be humidified. The flow valve at the circulating liquid inlet continues to remain closed until the cell voltage of the fuel cell stack meets the voltage under the output power of the current fuel cell stack engine. It can be indicated that the proton exchange membrane of the fuel cell stack does not need to be humidified and the flow valve at the circulating liquid inlet is opened. This enables more accurate control of the intake flow and intake pressure of the fuel cell stack, so that the water content in the proton exchange membrane of the fuel cell stack meets the set requirements.

[0069] After opening the flow valve at the circulating liquid inlet, the PTC (Positive Temperature Coefficient) heater of the fuel cell stack is started. The temperature of the circulating hydrogen at the circulating hydrogen inlet can be detected by a temperature sensor to determine whether the temperature of the circulating hydrogen at the circulating hydrogen inlet has reached a preset temperature. When the temperature of the circulating hydrogen at the circulating hydrogen inlet reaches the preset temperature, it can be indicated that the secondary flow gas of the integrated hydrogen circulation system has returned to normal temperature. At this time, the PTC heater of the fuel cell stack is turned off and the flow valve is controlled to enter automatic control mode. By providing a PTC heater on the fuel cell stack, heating can be automatically stopped when the set temperature is reached, avoiding safety issues such as fire caused by overheating. It also has the characteristics of strong anti-interference ability, low cost, and the ability to maintain a relatively stable working state under different environmental conditions.

[0070] PTC heaters utilize the resistance-temperature characteristics of PTC materials to achieve automatic constant-temperature heating. When current flows through a PTC element, its resistance increases nonlinearly with increasing temperature. At low temperatures, the PTC element's resistance is low, while the current is high, generating significant heat and causing a rapid temperature rise. When the temperature reaches the Curie temperature (a set threshold), the resistance rises sharply, the current decreases, and the heat generation power decreases, ultimately reaching a dynamic equilibrium and maintaining a constant temperature. This characteristic enables the element to adapt to varying ambient temperatures and automatically adjust its output power, eliminating the need for an external temperature control system.

[0071] In some embodiments, after the humidity of the primary flow gas of the fuel cell stack increases, the cell voltage of the fuel cell stack is still not greater than the first preset voltage, which prompts the driver that the water content in the proton exchange membrane of the fuel cell stack is very low, resulting in a proton exchange membrane over-drying failure.

[0072] In some embodiments of the present invention, after detecting whether the water content in the proton exchange membrane of the fuel cell stack is not greater than a preset water content threshold, the method further includes: in response to the water content being greater than the preset water content threshold, starting the flow valve at the circulating fluid inlet and the PTC heater of the fuel cell stack, detecting the cell voltage of the fuel cell stack; in response to the cell voltage being greater than a second preset voltage and the cell voltage of the fuel cell stack being consistent with the voltage at the output power of the current fuel cell stack engine, turning off the PTC heater of the fuel cell stack and controlling the flow valve to enter an automatic control mode. The second preset voltage can be calibrated according to actual conditions, for example, the second preset voltage can be 0.5V.

[0073] Specifically, whether the water content in the proton exchange membrane of the fuel stack is greater than the preset water content threshold is determined based on parameters such as the cell voltage, cell impedance, inlet and outlet humidity of the entire battery pack, and dew point temperature in the fuel stack. When the water content in the proton exchange membrane of the fuel stack is greater than the preset water content threshold, it can indicate that the water content in the proton exchange membrane is high, and multiple cell voltages of the fuel stack collapse. The collapse of cell voltage can refer to a sudden drop in multiple cell voltages, and each cell voltage is different. At this time, the flow valve at the circulating liquid inlet and the PTC heater of the fuel stack are started, and the water content of the secondary flow gas of the integrated hydrogen circulation system remains unchanged, the gas volume increases, the temperature rises, and the dew point temperature decreases. Since the humidity of the secondary flow gas is low, the humidity of the primary flow gas of the fuel stack decreases after the secondary flow gas is mixed with the primary flow gas, and the water content in the proton exchange membrane decreases. Detect the cell voltage of the fuel cell stack and determine whether the cell voltage is greater than a second preset voltage. When the cell voltage is greater than the second preset voltage, determine again whether the cell voltage of the fuel cell stack meets the voltage under the output power of the current fuel cell stack engine. When the cell voltage of the fuel cell stack meets the voltage under the output power of the current fuel cell stack engine, turn off the PTC heater of the fuel cell stack and control the flow valve to enter the automatic control mode. At this time, the temperature of the secondary flow gas returns to normal. When the cell voltage of the fuel cell stack does not meet the voltage under the output power of the current fuel cell stack engine, the PTC heater of the fuel cell stack continues to remain in the on state until the cell voltage of the fuel cell stack meets the voltage under the output power of the current fuel cell stack engine. Then, turn off the PTC heater of the fuel cell stack and control the flow valve to enter the automatic control mode. This can more accurately control the intake flow and intake pressure of the fuel cell stack, so that the water content in the proton exchange membrane of the fuel cell stack meets the set requirements.

[0074] In some embodiments, after the humidity of the primary flow gas of the fuel cell stack decreases, the cell voltage of the fuel cell stack is still not greater than the second preset voltage, which prompts the driver that the water content in the proton exchange membrane of the fuel cell stack is very high, resulting in a proton exchange membrane humidity failure.

[0075] As a specific embodiment, Figure 8 As shown in FIG. 1 , the flow chart of the control method of the integrated hydrogen circulation system of the present invention may include the following steps:

[0076] S801, in response to the fuel cell stack's demand for hydrogen flow being lower than a preset flow threshold.

[0077] S802: Start the first control valve to open the first ejector or start the second control valve to open the second ejector.

[0078] S803: Determine whether the water content in the proton exchange membrane of the fuel cell stack is lower than a preset water content threshold. If yes, execute step S804; if not, execute step S812.

[0079] S804: Determine whether the cell voltage of the fuel cell stack is not greater than a first preset voltage. If yes, execute step S805; if not, execute step S807.

[0080] S805, close the flow valve at the circulating fluid inlet.

[0081] S806, continue to detect the cell voltage of the fuel cell stack.

[0082] S807: Determine whether the cell voltage of the fuel cell stack meets the voltage under the current fuel cell stack engine output power. If yes, execute step S808; if not, execute step S816.

[0083] S808, open the flow valve at the circulating fluid inlet.

[0084] S809: Start the PTC heater of the fuel cell stack and detect the temperature of the circulating hydrogen at the circulating hydrogen inlet.

[0085] S810: Determine whether the temperature of the circulating hydrogen reaches a preset temperature. If yes, execute step S811; if not, return to step S809.

[0086] S811, control the flow valve to enter automatic control mode.

[0087] S812, start the flow valve of the circulating fluid inlet and the PTC heater of the fuel cell stack, and detect the cell voltage of the fuel cell stack.

[0088] S813: Determine whether the cell voltage is greater than a second preset voltage. If yes, proceed to step S814; if not, return to step S812.

[0089] S814: Determine whether the cell voltage of the fuel cell stack meets the voltage under the current fuel cell stack engine output power. If yes, execute step S815; if not, execute step S816.

[0090] S815, turn off the PTC heater of the fuel cell stack and control the flow valve to enter the automatic control mode.

[0091] S816, the PTC heater of the fuel cell stack continues to remain on.

[0092] Therefore, when the required hydrogen flow rate of the fuel cell stack is low, the present invention turns on the first ejector or the second ejector, controls the flow valve of the circulating liquid inlet and the opening or closing of the PTC heater of the fuel cell stack and continuously detects the cell voltage of the fuel cell stack, so that the water content in the proton exchange membrane of the fuel cell stack reaches a preset water content threshold, so that the proton exchange membrane of the fuel cell stack is neither too wet nor too dry.

[0093] In some embodiments of the present invention, the above method also includes: in response to the hydrogen flow rate required by the fuel cell stack being higher than a preset flow rate threshold, starting the first control valve to open the first ejector and starting the second control valve to open the second ejector; detecting whether the water content in the proton exchange membrane of the fuel cell stack is lower than the preset water content threshold, and in response to the water content being lower than the preset water content threshold and the cell voltage of the fuel cell stack being not greater than the second preset voltage, closing the flow valve at the circulating liquid inlet; continuing to detect the cell voltage of the fuel cell stack, and in response to the cell voltage of the fuel cell stack being greater than the second preset voltage and the cell voltage of the fuel cell stack being consistent with the voltage under the output power of the current fuel cell stack engine, opening the flow valve at the circulating liquid inlet.

[0094] Specifically, when the required hydrogen flow rate of the fuel cell stack is higher than the preset flow rate threshold and at the rated power output of the fuel cell engine, the first control valve is started to open the first ejector and the second control valve is started to open the second ejector, that is, both control valves are opened at the same time, the fuel cell engine starts to run, and the hydrogen pump stops working. Continue to detect the water content in the proton exchange membrane of the fuel stack, and determine whether the water content in the proton exchange membrane of the fuel stack is lower than the preset water content threshold. When the water content in the proton exchange membrane of the fuel stack is lower than the preset water content threshold, it can be said that the water content in the proton exchange membrane of the fuel stack is small. Determine whether the single cell voltage of the fuel stack is not greater than the second preset voltage. When the single cell voltage of the fuel stack is not greater than the second preset voltage, the fuel cell engine operates at 90% of the rated power, and the flow valve at the circulating liquid inlet is closed. At this time, since the circulating liquid no longer heats the secondary flow gas, the secondary flow gas begins to cool down. Therefore, the secondary flow gas temperature of the integrated hydrogen circulation system decreases. When the gas temperature reaches the dew point temperature, liquid water is generated. After the liquid water is mixed with the primary flow gas, the humidity of the primary flow gas of the fuel stack increases, and the water content in the proton exchange membrane increases. Continue to detect the cell voltage of the fuel cell stack to determine whether the cell voltage of the fuel cell stack is greater than the second preset voltage. When the cell voltage of the fuel cell stack is greater than the second preset voltage, determine whether the cell voltage of the fuel cell stack meets the voltage under the output power of the current fuel cell stack engine. When the cell voltage of the fuel cell stack meets the voltage under the output power of the current fuel cell stack engine, turn on the PTC heater of the fuel cell stack and the flow valve at the circulating liquid inlet. After the secondary flow gas returns to normal temperature, turn off the PTC heater of the fuel cell stack and control the flow valve to enter automatic control mode.

[0095] In some embodiments, when the fuel cell voltage of the fuel cell stack is no greater than 0.6V, the fuel cell engine operates at 90% of rated power, and the flow valve at the circulating fluid inlet is closed. When the fuel cell voltage of the fuel cell stack is greater than 0.6V and less than 0.65V, the flow valve at the circulating fluid inlet is closed. When the fuel cell voltage of the fuel cell stack is not greater than 0.6V and less than 0.65V, the water content in the proton exchange membrane is very low, and the proton exchange membrane enters a dry state.

[0096] When the water content in the proton exchange membrane of the fuel cell stack is greater than a preset water content threshold, it can indicate that the water content in the proton exchange membrane is high, and the voltage of multiple cells of the fuel cell stack collapses. At this time, the flow valve at the circulating liquid inlet and the PTC heater of the fuel cell stack are activated. The water content of the secondary flow gas of the integrated hydrogen circulation system remains unchanged, the gas volume increases, the temperature rises, and the dew point temperature decreases. Because the humidity of the secondary flow gas is low, the humidity of the primary flow gas of the fuel cell stack decreases after the secondary flow gas mixes with the primary flow gas, and the water content in the proton exchange membrane decreases. The cell voltage of the fuel cell stack is detected to determine whether the cell voltage is greater than a second preset voltage. When the cell voltage is greater than the second preset voltage, it is again determined whether the cell voltage of the fuel cell stack meets the voltage at the output power of the current fuel cell stack engine. When the cell voltage of the fuel cell stack meets the voltage at the output power of the current fuel cell stack engine, the PTC heater of the fuel cell stack is turned off, and the flow valve is controlled to enter automatic control mode. At this time, the temperature of the secondary flow gas returns to normal. When the cell voltage of the fuel cell stack does not meet the voltage under the current output power of the fuel cell stack engine, the PTC heater of the fuel cell stack continues to remain on until the cell voltage of the fuel cell stack meets the voltage under the current output power of the fuel cell stack engine. Then, the PTC heater of the fuel cell stack is turned off, and the flow valve is controlled to enter the automatic control mode, and the temperature of the secondary flow gas returns to normal. At this time, after the humidity of the primary flow gas of the fuel cell stack decreases, the cell voltage of the fuel cell stack is still not greater than the second preset voltage. At this time, the driver is prompted that the water content in the proton exchange membrane of the fuel cell stack is very high, resulting in a proton exchange membrane humidity failure. The fuel cell stack's intake flow and intake pressure can be controlled more accurately to ensure that the water content in the proton exchange membrane of the fuel cell stack meets the set requirements.

[0097] As another specific embodiment, Figure 9 As shown in FIG. 1 , the flow chart of the control method of the integrated hydrogen circulation system of the present invention may include the following steps:

[0098] S901, in response to the fuel cell stack's demand for hydrogen flow being higher than a preset flow threshold.

[0099] S902: Start the first control valve to open the first ejector and start the second control valve to open the second ejector.

[0100] S903: Determine whether the water content in the proton exchange membrane of the fuel cell stack is lower than a preset water content threshold. If yes, proceed to step S904.

[0101] S904: Determine whether the cell voltage of the fuel cell stack is not greater than a second preset voltage. If yes, execute step S905; if not, execute step S907.

[0102] S905, close the flow valve at the circulating fluid inlet.

[0103] S906, continue to detect the cell voltage of the fuel cell stack.

[0104] S907: Determine whether the cell voltage of the fuel cell stack meets the voltage under the current output power of the fuel cell stack engine. If yes, execute step S908; if not, execute step S909.

[0105] S908, open the flow valve at the circulating fluid inlet.

[0106] S909, the PTC heater of the fuel cell stack continues to remain on.

[0107] Therefore, when the required hydrogen flow rate of the fuel cell stack is high, the present invention turns on the first ejector and the second ejector, controls the flow valve of the circulating liquid inlet and the opening or closing of the PTC heater of the fuel cell stack and continuously detects the cell voltage of the fuel cell stack, so that the water content in the proton exchange membrane of the fuel cell stack reaches a preset water content threshold, so that the proton exchange membrane of the fuel cell stack is neither too wet nor too dry.

[0108] In summary, the control method of the integrated hydrogen circulation system according to an embodiment of the present invention includes: determining whether the required hydrogen flow of the fuel cell stack is lower than a preset flow threshold, and in response to the required hydrogen flow of the fuel cell stack being lower than the preset flow threshold, starting the first control valve to open the first ejector or starting the second control valve to open the second ejector; detecting whether the water content in the proton exchange membrane of the fuel cell stack is lower than the preset water content threshold, and in response to the water content being lower than the preset water content threshold and the cell voltage of the fuel cell stack being not greater than the first preset voltage, closing the flow valve at the circulating liquid inlet; continuing to detect the cell voltage of the fuel cell stack, and in response to the cell voltage of the fuel cell stack being greater than the first preset voltage and the cell voltage of the fuel cell stack being consistent with the voltage under the output power of the current fuel cell stack engine, opening the flow valve at the circulating liquid inlet. Therefore, this method can solve the problems of large pressure loss and poor control accuracy of the hydrogen circulation system in the fuel cell system. It can more accurately control the intake flow and intake pressure of the fuel cell stack, so that the water content in the proton exchange membrane of the fuel cell stack meets the set requirements, and realize the insulation of the hydrogen pump in a low-temperature environment, reduce pressure loss, reduce the risk of leakage, and ensure the coverage range of the hydrogen circulation power of the high-power fuel cell.

[0109] It should be noted that the method of the embodiment of the present invention can be performed by a single device, such as a computer or server. The method of this embodiment can also be applied in a distributed scenario, where multiple devices cooperate to perform the method. In such a distributed scenario, one of the multiple devices may only perform one or more steps of the method of the embodiment of the present invention, and the multiple devices will interact with each other to complete the above method.

[0110] It should be noted that the above description is limited to some embodiments of the present invention. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims may be performed in an order different from that described in the above embodiments and still achieve the desired results. Furthermore, the processes depicted in the accompanying drawings do not necessarily require the specific order or sequential order shown to achieve the desired results. In certain embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0111] Corresponding to the above embodiment, the present invention further proposes a control device for an integrated hydrogen circulation system.

[0112] like Figure 10 As shown, the control device of the integrated hydrogen circulation system according to the embodiment of the present invention includes: a determination module 1010 , a detection module 1020 and a control module 1030 .

[0113] Among them, the determination module 1010 is configured to determine whether the required hydrogen flow of the fuel cell stack is lower than a preset flow threshold, and in response to the required hydrogen flow of the fuel cell stack being lower than the preset flow threshold, start the first control valve to open the first ejector or start the second control valve to open the second ejector; the detection module 1020 is configured to detect whether the water content in the proton exchange membrane of the fuel cell stack is lower than the preset water content threshold, and in response to the water content being lower than the preset water content threshold and the cell voltage of the fuel cell stack being not greater than the first preset voltage, close the flow valve at the circulating liquid inlet; the control module 1030 is configured to continue to detect the cell voltage of the fuel cell stack, and in response to the cell voltage of the fuel cell stack being greater than the first preset voltage and the cell voltage of the fuel cell stack being consistent with the voltage under the output power of the current fuel cell stack engine, open the flow valve at the circulating liquid inlet.

[0114] In some embodiments of the present invention, after detecting whether the water content in the proton exchange membrane of the fuel cell stack is not greater than a preset water content threshold, the detection module 1020 is also used to, in response to the water content being greater than the preset water content threshold, start the flow valve at the circulating liquid inlet and the PTC heater of the fuel cell stack, and detect the cell voltage of the fuel cell stack; in response to the cell voltage being greater than a second preset voltage and the cell voltage of the fuel cell stack being consistent with the voltage under the output power of the current fuel cell stack engine, turn off the PTC heater of the fuel cell stack and control the flow valve to enter automatic control mode.

[0115] In some embodiments of the present invention, the determination module 1010 is also used to, in response to the hydrogen flow rate required by the fuel cell stack being higher than a preset flow rate threshold, start the first control valve to open the first ejector and start the second control valve to open the second ejector; detect whether the water content in the proton exchange membrane of the fuel cell stack is lower than a preset water content threshold, and in response to the water content being lower than the preset water content threshold and the cell voltage of the fuel cell stack being not greater than a second preset voltage, close the flow valve at the circulating liquid inlet; continue to detect the cell voltage of the fuel cell stack, and in response to the cell voltage of the fuel cell stack being greater than the second preset voltage and the cell voltage of the fuel cell stack being consistent with the voltage under the output power of the current fuel cell stack engine, open the flow valve at the circulating liquid inlet.

[0116] It should be noted that for details not disclosed in the control device of the integrated hydrogen circulation system in the embodiment of the present invention, please refer to the details disclosed in the control method of the integrated hydrogen circulation system in the embodiment of the present invention, and no further details will be given.

[0117] In summary, the control device of the integrated hydrogen circulation system according to an embodiment of the present invention includes: a determination module, configured to determine whether the required hydrogen flow of the fuel cell stack is lower than a preset flow threshold, and in response to the required hydrogen flow of the fuel cell stack being lower than the preset flow threshold, starting the first control valve to open the first ejector or starting the second control valve to open the second ejector; a detection module, configured to detect whether the water content in the proton exchange membrane of the fuel cell stack is lower than the preset water content threshold, and in response to the water content being lower than the preset water content threshold and the cell voltage of the fuel cell stack being not greater than the first preset voltage, closing the flow valve at the circulating liquid inlet; a control module, configured to continue to detect the cell voltage of the fuel cell stack, and in response to the cell voltage of the fuel cell stack being greater than the first preset voltage and the cell voltage of the fuel cell stack being consistent with the voltage under the output power of the current fuel cell stack engine, opening the flow valve at the circulating liquid inlet. Therefore, this device can solve the problems of large pressure loss and poor control accuracy of the hydrogen circulation system in the fuel cell system. It can more accurately control the intake flow and intake pressure of the fuel cell stack, so that the water content in the proton exchange membrane of the fuel cell stack meets the set requirements, and realize the insulation of the hydrogen pump in a low-temperature environment, reduce pressure loss, reduce the risk of leakage, and ensure the coverage of the hydrogen circulation power of the high-power fuel cell.

[0118] For the convenience of description, the above system is described as being divided into various modules according to their functions. Of course, when implementing the present invention, the functions of each module can be implemented in the same or multiple software and / or hardware.

[0119] The system of the above embodiment is used to implement the corresponding method in any of the above embodiments, and has the beneficial effects of the corresponding method embodiment, which will not be described in detail here.

[0120] Corresponding to the above embodiment, the present invention further provides an electronic device.

[0121] refer to Figure 11 , is a block diagram of an electronic device according to some embodiments of the present invention, illustrating a more specific hardware structure of an electronic device provided by this embodiment. The electronic device may include: a processor 1110, a memory 1120, an input / output interface 1130, a communication interface 1140, and a bus 1150. The processor 1110, the memory 1120, the input / output interface 1130, and the communication interface 1140 are communicatively connected to each other within the electronic device via the bus 1150.

[0122] The processor 1110 can be implemented using a general-purpose CPU (Central Processing Unit), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of this specification.

[0123] The memory 1120 can be implemented in the form of ROM (Read Only Memory), RAM (Random Access Memory), static storage devices, dynamic storage devices, etc. The memory 1120 can store an operating system and other application programs. When the technical solutions provided in the embodiments of this specification are implemented through software or firmware, the relevant program code is stored in the memory 1120 and is called and executed by the processor 1110.

[0124] The input / output interface 1130 is used to connect an input / output module to implement information input and output. The input / output module can be configured as a component in the electronic device (not shown in the figure), or it can be externally connected to the electronic device to provide corresponding functions. The input electronic device may include a keyboard, mouse, touch screen, microphone, various sensors, etc., and the output electronic device may include a display, speaker, vibrator, indicator light, etc.

[0125] The communication interface 1140 is used to connect to a communication module (not shown) to enable communication between the electronic device and other electronic devices. The communication module can communicate via a wired method (such as USB, network cable, etc.) or a wireless method (such as mobile network, WiFi, Bluetooth, etc.).

[0126] The bus 1150 includes a path that transmits information between various components of the electronic device (eg, the processor 1110 , the memory 1120 , the input / output interface 1130 , and the communication interface 1140 ).

[0127] It should be noted that although the above electronic device only shows the processor 1110, the memory 1120, the input / output interface 1130, the communication interface 1140, and the bus 1150, in a specific implementation, the electronic device may also include other components necessary for normal operation. In addition, those skilled in the art will understand that the above electronic device may only include the components necessary to implement the embodiments of this specification, and does not necessarily include all the components shown in the figures.

[0128] The electronic device of the above embodiment is used to implement the corresponding method in any of the above embodiments, and has the beneficial effects of the corresponding method embodiment, which will not be described in detail here.

[0129] Based on the same inventive concept, corresponding to the method of any of the above embodiments, the present invention further provides a computer-readable storage medium, which stores computer instructions, and the computer instructions are used to enable a computer to execute the method of any of the above embodiments.

[0130] The above-mentioned computer-readable storage medium can be any available medium or data storage device that can be accessed by a computer, including but not limited to magnetic storage (such as floppy disks, hard disks, magnetic tapes, magneto-optical disks (MO)), optical storage (such as CDs, DVDs, BDs, HVDs, etc.), and semiconductor storage (such as ROMs, EPROMs, EEPROMs, non-volatile memories (NANDFLASH), solid-state drives (SSDs)), etc.

[0131] The computer instructions stored in the storage medium of the above embodiment are used to enable a computer to execute the method of any embodiment in the above exemplary method section, and have the beneficial effects of the corresponding method embodiment, which will not be repeated here.

[0132] Furthermore, although the operations of the present method are described in a particular order in the accompanying drawings, this does not require or imply that the operations must be performed in that particular order, or that all of the operations shown must be performed to achieve the desired results. Rather, the steps depicted in the flowcharts may be performed in a different order. Additionally or alternatively, certain steps may be omitted, multiple steps may be combined into a single step, and / or a single step may be broken down into multiple steps.

[0133] It should be understood that various parts of the present invention can be implemented using hardware, software, firmware, or a combination thereof. In the above-described embodiments, multiple steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application-specific integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0134] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present invention should have the usual meanings understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the embodiments of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0135] Although the spirit and principles of the present invention have been described with reference to several specific embodiments, it should be understood that the present invention is not limited to the specific embodiments disclosed, and the division into various aspects does not mean that the features of these aspects cannot be combined to benefit. Such division is merely for the convenience of expression. The present invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. The scope of the appended claims is to be accorded the broadest interpretation so as to encompass all such modifications and equivalent structures and functions.

Claims

1. An integrated hydrogen circulation system, characterized in that: include: An integrated housing, the integrated housing comprising an upper ejector housing (10) and a lower water separator housing (11); A hydrogen pump (17) is provided at the top end of the ejector housing (10), a hydrogen circulation device (18) is provided in the ejector housing (10), a gas-liquid separation chamber (19) is formed between the hydrogen circulation device (18) and the ejector housing (10), the hydrogen pump (17) is communicated with the top end of the hydrogen circulation device (18), a circulating hydrogen inlet is provided at the bottom of the hydrogen circulation device (18), an ejector is provided on the side of the ejector housing (10), and the ejector is communicated with the hydrogen pump (17); A water storage chamber (22) is provided inside the water separator housing (11), a drain valve (23) is provided at the bottom of the water storage chamber (22), and an exhaust valve (24) is provided on the side of the water separator housing (11).

2. The integrated hydrogen circulation system according to claim 1, characterized in that: A circulating liquid flow channel (25) is provided between the hydrogen pump (17) and the ejector housing (10), and a circulating liquid inlet (26) and a circulating liquid outlet (27) are provided on the side of the ejector housing (10).

3. The integrated hydrogen circulation system according to claim 1, characterized in that: The ejector comprises a first ejector (20) and a second ejector (21), wherein the first ejector (20) is provided with a first control valve (30), and the second ejector (21) is provided with a second control valve (31).

4. The integrated hydrogen circulation system according to claim 1, characterized in that: A mixed discharge valve is also provided at the bottom of the water storage chamber (22), and the inlet of the mixed discharge valve is communicated with the drain valve (23) and the exhaust valve (24).

5. A control method for an integrated hydrogen circulation system, characterized in that: Applied to the integrated hydrogen circulation system according to any one of claims 1 to 4, the method comprises: determining whether a required hydrogen flow rate of the fuel cell stack is lower than a preset flow rate threshold, and in response to the required hydrogen flow rate of the fuel cell stack being lower than the preset flow rate threshold, starting the first control valve to open the first ejector or starting the second control valve to open the second ejector; detecting whether the water content in the proton exchange membrane of the fuel cell stack is lower than a preset water content threshold, and closing a flow valve at a circulating liquid inlet in response to the water content being lower than the preset water content threshold and the cell voltage of the fuel cell stack being no greater than a first preset voltage; Continue to detect the cell voltage of the fuel cell stack, and in response to the cell voltage of the fuel cell stack being greater than the first preset voltage and the cell voltage of the fuel cell stack being consistent with the voltage under the output power of the current fuel cell stack engine, open the flow valve of the circulating liquid inlet.

6. The control method of the integrated hydrogen circulation system according to claim 5, characterized in that: After detecting whether the water content in the proton exchange membrane of the fuel cell stack is not greater than a preset water content threshold, the method further includes: In response to the water content being greater than the preset water content threshold, starting a flow valve at a circulating fluid inlet and a PTC heater of the fuel cell stack, and detecting a cell voltage of the fuel cell stack; In response to the cell voltage being greater than a second preset voltage and the cell voltage of the fuel cell stack meeting the voltage at the output power of the current fuel cell stack engine, the PTC heater of the fuel cell stack is turned off and the flow valve is controlled to enter an automatic control mode.

7. The control method of the integrated hydrogen circulation system according to claim 5, characterized in that: The method further comprises: In response to the hydrogen flow rate required by the fuel cell stack being higher than the preset flow rate threshold, starting the first control valve to open the first ejector and starting the second control valve to open the second ejector; detecting whether the water content in the proton exchange membrane of the fuel cell stack is lower than a preset water content threshold, and closing a flow valve at a circulating liquid inlet in response to the water content being lower than the preset water content threshold and the cell voltage of the fuel cell stack being no greater than a second preset voltage; Continue to detect the cell voltage of the fuel cell stack, and in response to the cell voltage of the fuel cell stack being greater than the second preset voltage and the cell voltage of the fuel cell stack being consistent with the voltage under the output power of the current fuel cell stack engine, open the flow valve of the circulating liquid inlet.

8. A control device for an integrated hydrogen circulation system, characterized in that: include: a determination module configured to determine whether a required hydrogen flow rate of the fuel cell stack is lower than a preset flow rate threshold, and in response to the required hydrogen flow rate of the fuel cell stack being lower than the preset flow rate threshold, activate the first control valve to open the first ejector or activate the second control valve to open the second ejector; a detection module configured to detect whether the water content in the proton exchange membrane of the fuel cell stack is lower than a preset water content threshold, and in response to the water content being lower than the preset water content threshold and the cell voltage of the fuel cell stack being no greater than a first preset voltage, close a flow valve at a circulating liquid inlet; The control module is configured to continue detecting the cell voltage of the fuel cell stack, and in response to the cell voltage of the fuel cell stack being greater than the first preset voltage and the cell voltage of the fuel cell stack being consistent with the voltage under the output power of the current fuel cell stack engine, open the flow valve of the circulating liquid inlet.

9. An electronic device, characterized in that: include: A processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the control method of the integrated hydrogen circulation system according to any one of claims 5 to 7 are implemented.

10. A computer-readable storage medium, characterized in that The readable storage medium stores a program or instruction, and when the program or instruction is executed by the processor, the steps of the control method of the integrated hydrogen circulation system according to any one of claims 5 to 7 are implemented.

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