A non-stop fuel cell power generation system

Abstract

The present invention discloses a non-stop fuel cell power generation system, which relates to the technical field of battery power generation, and includes: a drainage pipeline, which is located in the electrolyte membrane, and the water inlet ends are respectively located on both sides of the lower part of the electrolyte membrane, and the water outlet end is located below the electrolyte membrane; a water-gas separation component, which is located below the electrolyte membrane, and the water outlet end of the drainage pipeline is connected to the water-gas separation component for water-gas separation and discharge; an exhaust pipeline, the air inlet end is located in communication with the water-gas separation component, and is used to discharge the gas in the water-gas separation component, and the air outlet end is connected to the hydrogen gas supply pipeline of the fuel cell through a valve body assembly. The reactants can be discharged effectively and timely according to the working conditions of the fuel cell, and hydrogen will not be discharged when the reactants are discharged, thereby effectively saving battery fuel. In addition, since a drainage structure is set up at the anode, the anode will no longer experience the "flooding" phenomenon, further ensuring the stable operation of the fuel cell.

Description

Technical Field

[0001] The present invention relates to the technical field of battery power generation, and in particular to a non-stop fuel cell power generation system. Background Art

[0002] A fuel cell is a chemical battery that converts the chemical energy of a fuel (usually hydrogen) and an oxidant (usually oxygen) into electrical energy through a redox reaction. Unlike most batteries, a fuel cell requires a continuous source of fuel and oxygen (usually from the air) to maintain the chemical reaction, whereas in batteries, the chemical energy usually comes from metals and their ions or oxides already present in the battery. In theory, a fuel cell can generate electricity continuously as long as there is a fuel cell box and oxygen supply.

[0003] The only reactant in a hydrogen fuel cell is water, which is mainly produced at the cathode. However, due to the influence of the concentration gradient between the anode and cathode, the water produced at the cathode will penetrate through the proton exchange membrane to the anode. If the water and gas cannot be separated in time, it will affect the normal operation of the anode components and systems, and thus affect the life of the fuel cell stack.

[0004] Currently, pulse emission is widely used. Although this method is simple to operate, the power generation of the fuel cell changes according to external demand, and there are fluctuations in high and low power, which may cause drainage blockage or discharge of some hydrogen during drainage. Summary of the invention

[0005] The purpose of the present invention is to overcome the technical problems in the prior art that reactants are difficult to discharge effectively and timely according to the operating conditions of the fuel cell, and hydrogen will not be discharged when the reactants are discharged. A non-stop fuel cell power generation system is provided, and the fuel cell has the advantages of efficiently and stably discharging reactants according to the operating conditions.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A non-stop fuel cell power generation system, comprising:

[0008] A drainage pipeline is located in the electrolyte membrane, with water inlet ends respectively located at two sides of the lower part of the electrolyte membrane, and a water outlet end located below the electrolyte membrane;

[0009] A water-gas separation component is located below the electrolyte membrane, and the water outlet end of the drainage pipeline is connected to the water-gas separation component for water-gas separation and discharge;

[0010] An exhaust pipeline, the air inlet end of which is connected to the water-gas separation component, is used to discharge the gas in the water-gas separation component, and the air outlet end is connected to the hydrogen supply pipeline of the fuel cell through the valve body component.

[0011] Preferably, the electrolyte membrane is an inverted T-shaped structure, the positive and negative electrodes are located on both sides, and the bottom ends are placed on the bosses on both sides, and the water inlet ends of the drainage pipeline are respectively located on the sides of the two bosses;

[0012] The drainage pipeline is an inverted U-shaped structure.

[0013] Preferably, a plurality of drainage pipelines are provided and symmetrically arranged on the electrolyte membrane, and water inlet ends of adjacent drainage pipelines are located on both sides of the electrolyte membrane.

[0014] Preferably, the water-gas separation component comprises:

[0015] The water outlet end of the drainage pipeline extends below the liquid surface inside the box body, and the air inlet end of the exhaust pipeline is located at the top of the inner side of the box body;

[0016] A drain control valve, located at the drain port on the bottom surface of the box body, used to open or close the drain port;

[0017] The sensor is located on the inner wall of the box and above the water outlet of the drainage pipeline, and is used to detect whether the liquid level in the box is higher than the water outlet of the drainage pipeline, and the signal output end is connected to the drainage control valve signal.

[0018] Preferably, the valve body assembly comprises:

[0019] A first valve body, located on the hydrogen supply pipeline, used to adjust the opening and closing degree of the first valve body;

[0020] A second valve body, located on the exhaust pipeline, used to open or close the exhaust pipeline;

[0021] The third valve body is used to connect the first valve body and the second valve body.

[0022] Preferably, the third valve body comprises:

[0023] A first flow cavity, for gas to pass through;

[0024] A first regulating cavity is located in the middle of the first circulation cavity and has an inner diameter greater than the inner diameter of the first circulation cavity;

[0025] The valve ball is located in the first regulating cavity, and is in clearance fit with the inner wall of the first regulating cavity, and is sealingly fitted with the two end positions of the first regulating cavity.

[0026] Preferably, the third valve body further includes:

[0027] A spring, the top end of which is fixedly connected to the valve ball, and the bottom end of which is fixed to the step surface on the first flow channel;

[0028] In a normal state, the spring is in a stretched state, and the valve ball is in sealing cooperation with the bottom end of the first regulating cavity.

[0029] Preferably, the third valve body further includes:

[0030] A bronchus, the outlet end of which extends into the second regulating cavity in the first valve body;

[0031] The second regulating cavity is located on the second circulation cavity in the first valve body, and the inner diameter of the second regulating cavity is greater than the inner diameter of the second circulation cavity.

[0032] Preferably, the portion of the bronchus extending into the second regulating cavity is in an inverted L-shape, and the upper horizontal portion and the gas outlet are arranged along the gas flow direction inside the second flow cavity.

[0033] Preferably, the signal input end of the second valve body is signal-connected to the signal output end of the sensor.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] In the present invention, the water inlet end of the drainage pipeline is located on both sides of the lower part of the electrolyte membrane, that is, on both sides of the electrolyte membrane, corresponding to the cathode and anode positions respectively. According to the ratio of the amount of water produced, the number of water inlet ends on both sides of the electrolyte membrane is appropriately allocated. Since the cathode produces more water and continuously produces water, the water inlet end there is basically immersed in water, while the amount of water produced on the anode side is less. During the drainage process, part of the hydrogen will enter the water-gas separation component with the drainage pipeline, and will be directly discharged by water after separation, while the hydrogen will be sent back to the hydrogen supply pipeline through the exhaust pipeline. Since the hydrogen concentration in the hydrogen supply pipeline is high, in order to allow the separated hydrogen to stably enter the hydrogen supply pipeline, the discharge of water is regulated by the valve body assembly. Through the above structure, the reactants can be effectively and timely discharged according to the working conditions of the fuel cell, and hydrogen will not be discharged when the reactants are discharged, thereby effectively saving battery fuel. In addition, since a drainage structure is set up at the anode, the anode will no longer experience the "flooding" phenomenon, further ensuring the stable operation of the fuel cell.

[0036] Since the hydrogen concentration in the hydrogen supply pipeline is relatively high, flowing to the anode is a dilution process. Therefore, when the second valve body is opened, the first valve body enters the hydrogen supply pipeline under the siphon effect during the flow of hydrogen inside the hydrogen supply pipeline. The greater the hydrogen flow rate inside the hydrogen supply pipeline, the faster the hydrogen is discharged through the first valve body, thereby creating a negative pressure inside the box, forcing the water at the anode and cathode to quickly pass through the drainage pipeline, thereby achieving the corresponding adjustment of high and low power and the adjustment of drainage efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a working principle diagram of an existing gas battery;

[0038] Figure 2 It is an axial side view of a non-stop fuel cell power generation system in one embodiment of the present invention;

[0039] Figure 3 This is a schematic diagram of the overall structure of a non-stop fuel cell power generation system in one embodiment of the present invention;

[0040] Figure 4 A front view of a non-stop fuel cell power generation system in one embodiment of the present invention;

[0041] Figure 5 for Figure 4 Sectional view at AA in the middle;

[0042] Figure 6 for Figure 5 Sectional view at the middle BB;

[0043] Figure 7 for Figure 4 Sectional view at CC;

[0044] Figure 8 It is a schematic diagram of the internal structure of a valve body assembly in a non-stop fuel cell power generation system according to one embodiment of the present invention.

[0045] In the figure:

[0046] 1. Drainage pipeline;

[0047] 2. Water-gas separation component; 21. Box; 22. Drain control valve; 23. Sensor;

[0048] 3. Exhaust pipe;

[0049] 4. Valve body assembly; 41. First valve body; 411. Second regulating cavity; 412. Second circulation cavity; 42. Second valve body; 43. Third valve body; 431. First circulation cavity; 432. First regulating cavity; 433. Valve ball; 434. Spring; 435. Bronchus;

[0050] 5. Hydrogen supply pipeline. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] Figure 1 This is a working principle diagram of an existing gas battery; Figure 2 It is an axial side view of a non-stop fuel cell power generation system in one embodiment of the present invention; Figure 3 This is a schematic diagram of the overall structure of a non-stop fuel cell power generation system in one embodiment of the present invention; Figure 4 A front view of a non-stop fuel cell power generation system in one embodiment of the present invention; Figure 5 for Figure 4 Sectional view at AA in the middle; Figure 6 for Figure 5 Sectional view at the middle BB; Figure 7 for Figure 4 Sectional view at CC; Figure 8 It is a schematic diagram of the internal structure of a valve body assembly in a non-stop fuel cell power generation system according to one embodiment of the present invention.

[0053] Combined with the accompanying drawings, in this embodiment, a non-stop fuel cell power generation system includes: a drainage pipeline 1, a water-gas separation component 2, an exhaust pipeline 3, a valve body component 4 and a hydrogen gas supply pipeline 5. Among them, the drainage pipeline 1 is located in the electrolyte membrane, and the water inlet ends are respectively located on both sides of the lower part of the electrolyte membrane, and the water outlet end is located below the electrolyte membrane; the water-gas separation component 2 is located below the electrolyte membrane, and the water outlet end of the drainage pipeline 1 is connected to the water-gas separation component 2 for water-gas separation and discharge; the exhaust pipeline 3 has an air inlet end located in communication with the water-gas separation component 2 for discharging the gas in the water-gas separation component 2, and the air outlet end is connected to the hydrogen gas supply pipeline 5 of the fuel cell through the valve body component 4.

[0054] Since the oxidation reaction mainly occurs at the cathode, the product is mainly water, and some water will enter the anode through the electrolyte membrane. Conventional fuel cells do not have a drainage structure at the anode, which is bound to cause "flooding", and in severe cases, will cause a short circuit between the two electrode plates. Therefore, in this solution, the water inlet ends of the drainage pipeline 1 are located on both sides of the lower part of the electrolyte membrane, that is, on both sides of the electrolyte membrane, corresponding to the cathode and anode positions respectively. According to the ratio of the amount of water produced, the number of water inlet ends on both sides of the electrolyte membrane is appropriately allocated. Since the amount of water produced at the cathode is large and continues to be produced, the water inlet end there is basically immersed in water, while the amount of water produced on the anode side is small. During the drainage process, part of the hydrogen will enter the water-gas separation component 2 along the drainage pipeline 1, and will be directly discharged by water after separation, while the hydrogen will be sent back to the hydrogen supply pipeline 5 through the exhaust pipeline 3. Since the hydrogen concentration in the hydrogen supply pipeline 5 is high, in order to allow the separated hydrogen to stably enter the hydrogen supply pipeline 5, the discharge of water is regulated by the valve body component 4. Through the above structure, the reactants can be discharged effectively and timely according to the working conditions of the fuel cell, and hydrogen will not be discharged when the reactants are discharged, thereby effectively saving battery fuel. In addition, since a drainage structure is set up at the anode, the anode will no longer be "flooded", further ensuring the stable operation of the fuel cell.

[0055] In this embodiment, in order to further avoid the "flooding" phenomenon of the positive and negative electrodes, the electrolyte membrane is set to an inverted T-shaped structure, the positive and negative electrodes are placed on both sides of the electrolyte membrane, and the bottoms of the positive and negative electrodes are placed on the bosses on both sides of the electrolyte membrane to play a role of padding. The water inlet end of the drainage pipe 1 is located on the side of the two bosses. Under this structure, "flooding" will only occur when the water submerges the bosses on both sides of the electrolyte membrane. However, due to the presence of the water inlet end, the water will be discharged from the drainage pipe 1, thereby avoiding the above-mentioned problem. In this embodiment, the drainage pipe 1 adopts an inverted U-shaped structure. When discharging water on the cathode side, due to the relatively low concentration on this side, oxygen is not suitable to enter the water-gas separation component 2 through the drainage pipe 1.

[0056] In this embodiment, there are multiple drainage pipes 1, which are symmetrically arranged on the electrolyte membrane, and the water inlet ends of adjacent drainage pipes 1 are located on both sides of the electrolyte membrane. By arranging a certain amount of water inlet ports on both sides, it is beneficial to quickly discharge water.

[0057] In order to facilitate those skilled in the art to understand how the water-gas separation component 2 works, the structure of the water-gas separation component 2 is further described. In this embodiment, the water-gas separation component 2 may include: a box body 21, a drain control valve 22 and a sensor 23. Among them, the water outlet end of the drainage pipeline 1 extends below the liquid level inside the box body 21, and the air inlet end of the exhaust pipeline 3 is located at the top of the inner side of the box body 21; the drain control valve 22 is located at the drainage port on the bottom surface of the box body 21, and is used to open or close the drainage port; the sensor 23 is located on the inner wall of the box body 21, and is located above the water outlet end of the drainage pipeline 1, and is used to detect whether the liquid level in the box body 21 is higher than the water outlet end of the drainage pipeline 1, and the signal output end is connected to the drain control valve 22 signal.

[0058] Through the above structure, the outlet end of the drainage pipeline 1 extends below the liquid surface inside the box 21, which can prevent the hydrogen entering the water-gas separation component 2 from entering the cathode through other drainage pipelines 1, thereby bypassing the positive and negative electrodes. The drainage control valve 22 is used for drainage control. In this embodiment, automatic control can be adopted, that is, when the liquid level detected by the sensor 23 is higher than the position where the sensor 23 is located (that is, higher than the outlet end of the drainage pipeline 1), the drainage control valve 22 can be opened, and when the liquid level detected by the sensor 23 is lower than the position where the sensor 23 is located, the drainage control valve 22 is closed, thereby ensuring that the water level inside the box 21 is always at a height position, achieving a water seal effect, so as to prevent hydrogen from entering the anode through other drainage pipelines 1, and at the same time, forcing the hydrogen entering the water-gas separation component 2 to be discharged from the exhaust pipeline 3 to the hydrogen supply pipeline 5 to achieve recycling and reuse.

[0059] In order to achieve stable control of the valve body assembly 4 and ensure that the exhaust pipeline 3 can stably deliver hydrogen to the hydrogen supply pipeline 5, the structure of the valve body assembly 4 is further described. In this embodiment, the valve body assembly 4 may include: a first valve body 41, a second valve body 42 and a third valve body 43. Among them, the first valve body 41 is located on the hydrogen supply pipeline 5, and is used to adjust the opening and closing degree of the first valve body 41; the second valve body 42 is located on the exhaust pipeline 3, and is used to open or close the exhaust pipeline 3; the third valve body 43 is used to connect the first valve body 41 and the second valve body 42. Specifically, the first valve body 41 is used to adjust the opening and closing degree of the first valve body 41, and the concentration of the anode hydrogen can be adjusted by changing the opening and closing degree, thereby achieving high and low power adjustment. The signal input end of the second valve body 42 is connected to the signal output end of the sensor 23. When the liquid level detected by the sensor 23 is lower than the position of the sensor 23, the second valve body 42 is closed; when the liquid level detected by the sensor 23 is higher than the position of the sensor 23, the second valve body 42 is opened. Since the hydrogen concentration in the hydrogen supply pipeline 5 is relatively high, flowing to the anode is a dilution process (a process of reducing pressure). Therefore, when the second valve body 42 is opened, the first valve body 41 enters the hydrogen supply pipeline 5 under the siphon effect during the flow of hydrogen inside the hydrogen supply pipeline 5. The greater the flow speed of hydrogen inside the hydrogen supply pipeline 5 (that is, the greater the opening and closing degree), the faster the speed of hydrogen discharge through the first valve body 41, thereby creating a negative pressure inside the box body 21, forcing the water at the anode and cathode to quickly pass through the drainage pipeline 1, thereby achieving the correspondence between the adjustment of high and low power and the adjustment of drainage efficiency.

[0060] In order to further explain how the third valve body 43 realizes the above-mentioned adjustment function, the structure of the third valve body 43 is further explained. In this embodiment, the third valve body 43 may include: a first circulation cavity 431, a first regulating cavity 432 and a valve ball 433. Among them, the first circulation cavity 431 is used for gas to pass; the first regulating cavity 432 is located in the middle of the first circulation cavity 431, and the inner diameter is larger than the inner diameter of the first circulation cavity 431; the valve ball 433 is located in the first regulating cavity 432, and is in clearance with the inner wall of the first regulating cavity 432, and is sealed with the two ends of the first regulating cavity 432. Specifically, the valve ball 433 normally relies on its own gravity to seal with the bottom end of the first regulating chamber 432. When the second valve body 42 is opened, the siphon effect during the flow of hydrogen inside the first valve body 41 will suck up the valve ball 433, thereby causing the third valve body 43 to open. At this time, the hydrogen in the exhaust pipe 3 can be discharged into the hydrogen supply pipe 5, thereby completing the recovery and reuse of the hydrogen.

[0061] To further ensure that the third valve body 43 remains in a closed state in normal state, in this embodiment, the third valve body 43 may further include: a spring 434. The top end of the spring 434 is fixedly connected to the valve ball 433, and the bottom end is fixed to the first circulation channel 431. In order to make the bottom end of the spring 434 better match with the first circulation channel 431 so that the spring 434 is better stressed, in this embodiment, a step surface may be provided on the first circulation channel 431, and the bottom end of the spring 434 is fixedly connected to the step surface. In normal state, the spring 434 is in a stretched state, and the valve ball 433 is sealed and matched with the bottom end of the first regulating channel 432.

[0062] In order to further ensure that the valve ball 433 is sucked up by the siphon effect during the flow of hydrogen inside the first valve body 41, in this embodiment, the third valve body 43 may also include: a bronchus 435. The outlet end of the bronchus 435 extends into the second regulating cavity 411 inside the first valve body 41. Specifically, a second regulating cavity 411 is provided on the second flow cavity 412 inside the first valve body 41, and the inner diameter of the second regulating cavity 411 is larger than the inner diameter of the second flow cavity 412, so as to ensure that the bronchus 435 can be arranged in the second regulating cavity 411, and will not cause the effective flow cross-section in the cavity to change, that is, will not affect the flow rate of hydrogen, and when the high-speed airflow flows through the outlet port of the bronchus 435, a negative pressure area will be formed here, thereby causing the hydrogen in the exhaust pipe 3 to be sucked out.

[0063] To further ensure that a stable negative pressure is formed at the outlet port of the bronchus 435, in this embodiment, the portion of the bronchus 435 extending into the second regulating cavity 411 is set to be an inverted L-shape, the upper portion is located at the horizontal portion, and this portion is coaxial with the second regulating cavity 411, that is, arranged along the airflow direction, and the outlet port of the bronchus 435 maintains the same direction as the first valve body 41. When hydrogen flows through the outlet port of the bronchus 435, a negative pressure area is formed there, thereby causing the hydrogen in the exhaust pipeline 3 to be sucked out.

[0064] In the present invention, the water inlet ends of the drainage pipeline 1 are respectively located on both sides of the lower part of the electrolyte membrane, that is, on both sides of the electrolyte membrane, corresponding to the cathode and anode positions respectively. According to the ratio of the amount of water produced, the number of water inlet ends on both sides of the electrolyte membrane is appropriately allocated. Since the amount of water produced at the cathode is relatively large and water is continuously produced, the water inlet end there is basically immersed in water, while the amount of water produced on the anode side is relatively small. During the drainage process, part of the hydrogen will enter the water-gas separation component 2 along the drainage pipeline 1, and will be directly discharged by water after separation, while the hydrogen will be sent back to the hydrogen supply pipeline 5 through the exhaust pipeline 3. Since the hydrogen concentration in the hydrogen supply pipeline 5 is relatively high, in order to allow the separated hydrogen to stably enter the hydrogen supply pipeline 5, the discharge of water is regulated by the valve body assembly 4. Through the above structure, the reactants can be effectively and timely discharged according to the working conditions of the fuel cell, and hydrogen will not be discharged when the reactants are discharged, thereby effectively saving battery fuel. In addition, since a drainage structure is set up at the anode, the anode will no longer experience the "flooding" phenomenon, further ensuring the stable operation of the fuel cell.

[0065] Since the hydrogen concentration in the hydrogen supply pipeline 5 is relatively high, the flow to the anode is a dilution process. Therefore, when the second valve body 42 is opened, the first valve body 41 enters the hydrogen supply pipeline 5 under the siphon effect during the flow of hydrogen inside the hydrogen supply pipeline 5. The greater the flow speed of hydrogen inside the hydrogen supply pipeline 5, the faster the speed of hydrogen discharge through the first valve body 41, thereby creating a negative pressure inside the box body 21, forcing the water at the anode and cathode to quickly pass through the drainage pipeline 1, thereby achieving the correspondence between the adjustment of high and low power and the adjustment of drainage efficiency.

[0066] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A non-stop fuel cell power generation system, characterized in that: include: A drainage pipeline (1) is located inside the electrolyte membrane, with water inlet ends located at two sides of the lower part of the electrolyte membrane, and water outlet ends located below the electrolyte membrane; A water-gas separation component (2) is located below the electrolyte membrane, and a water outlet end of the drainage pipeline (1) is connected to the water-gas separation component (2) for water-gas separation and discharge; An exhaust pipeline (3), the air inlet end of which is connected to the water-gas separation component (2) and is used to discharge the gas in the water-gas separation component (2), and the air outlet end of which is connected to the hydrogen supply pipeline (5) of the fuel cell through the valve body component (4); The electrolyte membrane is an inverted T-shaped structure, with positive and negative electrodes located on both sides, and the bottom ends are placed on the bosses on both sides, and the water inlet ends of the drainage pipeline (1) are respectively located on the sides of the two bosses; The drainage pipeline (1) is an inverted U-shaped structure.

2. The non-stop fuel cell power generation system according to claim 1, characterized in that: The drainage pipelines (1) are provided in plurality and are symmetrically arranged on the electrolyte membrane, and the water inlet ends of adjacent drainage pipelines (1) are located on both sides of the electrolyte membrane.

3. The non-stop fuel cell power generation system according to claim 1, characterized in that: The water-gas separation component (2) comprises: A box body (21), wherein the water outlet end of the drainage pipeline (1) extends below the liquid surface inside the box body (21), and the air inlet end of the exhaust pipeline (3) is located at the top inside the box body (21); A drainage control valve (22), located at a drainage port on the bottom surface of the box body (21), and used to open or close the drainage port; The sensor (23) is located on the inner wall of the box (21) and above the water outlet of the drainage pipeline (1), and is used to detect whether the liquid level in the box (21) is higher than the water outlet of the drainage pipeline (1), and the signal output end is connected to the drainage control valve (22) for signal.

4. The non-stop fuel cell power generation system according to claim 3, characterized in that: The valve body assembly (4) comprises: A first valve body (41), located on the hydrogen supply pipeline (5), and used for adjusting the opening and closing degree of the first valve body (41); A second valve body (42), located on the exhaust pipeline (3), and used to open or close the exhaust pipeline (3); a third valve body (43), used for connecting the first valve body (41) and the second valve body (42); The third valve body (43) comprises: A first flow cavity (431) for gas to pass through; A first regulating cavity (432), located in the middle of the first circulation cavity (431), and having an inner diameter greater than the inner diameter of the first circulation cavity (431); A valve ball (433) is located in the first regulating cavity (432), is gap-matched with the inner wall of the first regulating cavity (432), and is sealingly matched with the two ends of the first regulating cavity (432); The third valve body (43) further comprises: A spring (434), the top end of which is fixedly connected to the valve ball (433), and the bottom end of which is fixed to a stepped surface on the first flow channel (431); In a normal state, the spring (434) is in a stretched state, and the valve ball (433) is in sealing cooperation with the bottom end of the first regulating cavity (432); A bronchus (435), the gas outlet end of which extends into the second regulating cavity (411) in the first valve body (41); The second regulating cavity (411) is located on the second circulation cavity (412) in the first valve body (41), and the inner diameter of the second regulating cavity (411) is greater than the inner diameter of the second circulation cavity (412); The portion of the bronchus (435) extending into the second regulating cavity (411) is in an inverted L-shape, and the upper horizontal portion and the gas outlet end are arranged along the gas flow direction inside the second flow cavity (412).

5. The non-stop fuel cell power generation system according to claim 4, characterized in that: The signal input end of the second valve body (42) is signal-connected to the signal output end of the sensor (23).

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