Gas-water separator, its preparation method and fuel cell device

Abstract

The present invention discloses a gas-water separator, a preparation method thereof, and a fuel cell device. The gas-water separator includes a water separator cavity, a heating and drainage solenoid valve, and a heat insulation material; the water separator cavity includes an inner cavity, an outer cavity, and a hollow cavity; the hollow cavity is arranged between the inner cavity and the outer cavity, and the hollow cavity is filled with the heat insulation material; a liquid storage chamber is provided at the bottom of the inner cavity; a hydrogen inlet, a hydrogen return outlet, and a drainage outlet connected to the inner cavity are provided on the outer cavity; a first baffle and a second baffle are provided in the inner cavity; a connection hole shell is provided at the bottom end of the water separator cavity to install the heating and drainage solenoid valve, the inlet of the heating and drainage solenoid valve is connected to the connection hole, and the heating and drainage solenoid valve has functions of timed drainage, exhaust, and efficient heating. The gas-water separator, the preparation method thereof, and the fuel cell device proposed by the present invention can improve the separation efficiency and reduce the fluid pressure loss.

Description

Technical Field

[0001] The present invention belongs to the technical field of new energy, and relates to a fuel cell, in particular to a fuel cell gas-water separator and a preparation method thereof. Background Art

[0002] A fuel cell engine is a power generation device that directly converts the chemical energy of the reaction between hydrogen and oxygen inside the stack into electrical energy. In order to improve the hydrogen utilization rate of the fuel cell system, the current mainstream method is to adopt a hydrogen closed-end circulation mode. This method can not only improve the hydrogen utilization rate, but also ensure uniform hydrogen distribution on the anode side.

[0003] Existing hydrogen return devices cannot effectively separate the unreacted remaining hydrogen from water, resulting in a large amount of water entering the stack and causing flooding, which reduces the stack power. At the same time, when an electrochemical reaction occurs inside the stack, it is required that the fluids on the anode and cathode have a certain temperature to ensure the stable performance of the fuel cell system; moreover, after shutdown, the water will freeze in a low-temperature environment and block the drain outlet of the gas-water separator, resulting in abnormal low-temperature startup of the fuel cell system.

[0004] In view of this, there is an urgent need to design a new fuel cell gas-water separator today to overcome at least some of the above-mentioned defects existing in the existing gas-water separators. Summary of the Invention

[0005] The present invention provides a gas-water separator, a preparation method thereof, and a fuel cell device, which can improve the separation efficiency and reduce the fluid pressure loss.

[0006] To solve the above technical problems, according to one aspect of the present invention, the following technical solution is adopted:

[0007] A gas-water separator, the gas-water separator includes: a water separator cavity, a heating drain solenoid valve, and a polymer thermal insulation foam material;

[0008] The water separator cavity includes an outer cavity, an inner cavity, and a cavity; the cavity is arranged between the outer cavity and the inner cavity, and the cavity is filled with a polymer thermal insulation foam material; filling the cavity of the gas-water separator with a polymer thermal insulation foam material can avoid a large amount of heat dissipation in a low-temperature situation and achieve heat preservation;

[0009] The water separator cavity is provided with a hydrogen inlet, a hydrogen return port, a drain outlet, a connection hole, a liquid storage chamber, a first baffle, and a second baffle;

[0010] The top of the outer cavity is provided with a hydrogen return port, the side is provided with a hydrogen inlet, and the bottom is provided with a drain port and a connection hole; the hydrogen inlet, the hydrogen return port, and the drain port are connected to the inner cavity;

[0011] A liquid storage chamber is provided at the bottom of the inner cavity body; the inner cavity body is provided with a first baffle and a second baffle. The first baffle is close to the hydrogen inlet of the outer cavity body, and the second baffle is close to the hydrogen return port of the outer cavity body.

[0012] The sealing gasket is located between the upper end of the inner cavity body and the lower end of the cover plate; the sealing gasket is located between the upper end of the outer cavity body and the lower end of the cover plate.

[0013] The gas-liquid mixture of unreacted hydrogen and water at the anode of the fuel cell stack enters the inner cavity body of the gas-water separator from the hydrogen inlet. The gas-liquid mixture undergoes the first gas-liquid separation by using the rotation separation principle through the first baffle. The first baffle and the arc-shaped wall surface form a swirling air flow to increase the collision probability of liquid droplets, prompting small liquid droplets to grow into large liquid droplets. The large liquid droplets cold-condense and aggregate and then flow along the wall surface into the liquid storage chamber.

[0014] The remaining gas-liquid mixture after the first separation by the first baffle is blocked by the second baffle again. The second baffle can make the air flow downward along the arc surface, and the liquid droplets gather and drip downward under the action of gravity into the liquid storage chamber; the separated hydrogen, due to its relatively small density, returns to the fuel cell stack through the hydrogen return port with the air flow for reaction.

[0015] The first baffle is provided with a first attitude adjustment mechanism for adjusting the attitude of the first baffle in the inner cavity body; the second baffle is provided with a second attitude adjustment mechanism for adjusting the attitude of the second baffle in the inner cavity body.

[0016] A medium flow rate detection module is provided in the cavity body of the water separator for detecting the fluid condition in the cavity body of the water separator; the first attitude adjustment mechanism is used to adjust the attitude of the first baffle in the inner cavity body according to the detected fluid condition in the cavity body of the water separator, and the second attitude adjustment mechanism is used to adjust the attitude of the second baffle in the inner cavity body according to the detected fluid condition in the cavity body of the water separator.

[0017] The fluid condition includes at least one of the temperature, pressure, flow rate, and humidity of the fluid; the attitude includes at least one of the position of the corresponding baffle in the set area and the arc surface radian.

[0018] A connection hole is provided at the bottom end of the cavity body of the water separator. The heating and drainage solenoid valve is connected to the cavity body of the water separator through the connection hole; the heating and drainage solenoid valve is provided with a heating and drainage solenoid valve inlet, and the heating and drainage solenoid valve inlet is connected to the connection hole. The liquid water stored in the liquid storage chamber flows into the heating and drainage solenoid valve inlet through the water flow channel; the heating and drainage solenoid valve has the functions of timed drainage, exhaust, and self-heating.

[0019] The heating and drainage solenoid valve has a drainage port, and the heating and drainage solenoid valve is controlled by the control device to open the drainage port, so as to timely drain the water in the liquid storage chamber.

[0020] The heating and drain solenoid valve also has a heating function. When the ambient temperature is below 0 degrees Celsius, the water in the liquid storage chamber has a risk of freezing. The heating and drain solenoid valve is controlled by the control device to turn on the heating function to solve the cold start problem of the fuel cell system at low temperatures;

[0021] The water separator cavity is an injection molded part; a first sealing gasket is provided between the inner cavity and the first cover plate; the first sealing gasket is 0.5 mm higher than the installation groove; after installing the first sealing gasket, maintain a nitrogen pressure of 2 bar for 10 minutes without pressure drop; the cavity is filled with a polymer thermal insulation foam material; a second sealing gasket is provided between the outer cavity and the second cover plate; the thickness of the second sealing gasket is 1 mm; after installing the second sealing gasket, maintain a nitrogen pressure of 2 bar for 10 minutes without pressure drop.

[0022] According to another aspect of the present invention, the following technical solution is adopted: a gas-water separator, the gas-water separator includes: a water separator cavity, a heating and drain solenoid valve, and a thermal insulation material;

[0023] The gas-water separator cavity includes an inner cavity, an outer cavity, and a cavity; the cavity is arranged between the inner cavity and the outer cavity, and the cavity is filled with a thermal insulation material;

[0024] The bottom of the inner cavity has a liquid storage chamber; the outer cavity is provided with a hydrogen inlet, a hydrogen return port, and a drain outlet connected to the inner cavity; the inner cavity is provided with a first baffle and a second baffle;

[0025] The bottom end of the water separator cavity is provided with a connection hole shell to install the heating and drain solenoid valve. The inlet of the heating and drain solenoid valve is connected to the connection hole, and the heating and drain solenoid valve has functions of timed drainage, exhaust, and efficient heating.

[0026] As an embodiment of the present invention, the water separator cavity is a hydrophobic plastic injection molded part.

[0027] As an embodiment of the present invention, the polymer thermal insulation foam material filled between the inner cavity and the outer cavity of the water separator has a low thermal conductivity coefficient; a large service temperature range; small deformation and corrosion resistance and not easy to age.

[0028] As an embodiment of the present invention, the position of the first baffle is close to the hydrogen inlet of the outer cavity; the position of the second baffle is close to the hydrogen return port of the outer cavity.

[0029] As an embodiment of the present invention, the bottom of the outer cavity of the water separator is provided with a connection hole to install the heating and drain solenoid valve.

[0030] As an embodiment of the present invention, the water separator cavity is an injection molded part; a first sealing gasket is provided between the inner cavity and the first cover plate; the first sealing gasket is 0.5 mm higher than the installation groove; after installing the first sealing gasket, maintain a nitrogen pressure of 2 bar for 10 minutes without pressure drop; inject a polymer thermal insulation foam material into the cavity; a second sealing gasket is provided between the outer cavity and the second cover plate; the thickness of the second sealing gasket is 1 mm; after installing the second sealing gasket, maintain a nitrogen pressure of 2 bar for 10 minutes without pressure drop.

[0031] As an embodiment of the present invention, the first baffle is provided with a first attitude adjustment mechanism for adjusting the attitude of the first baffle within the inner cavity; the second baffle is provided with a second attitude adjustment mechanism for adjusting the attitude of the second baffle within the inner cavity.

[0032] A medium flow rate detection module is provided within the water separator cavity for detecting the fluid condition within the water separator cavity; the first attitude adjustment mechanism is used to adjust the attitude of the first baffle within the inner cavity according to the fluid condition detected by the water separator cavity, and the second attitude adjustment mechanism is used to adjust the attitude of the second baffle within the inner cavity according to the fluid condition detected by the water separator cavity.

[0033] The fluid condition includes at least one of the temperature, pressure, flow rate, and humidity of the fluid; the attitude includes at least one of the position of the corresponding baffle within a set area and the arc surface radian.

[0034] According to another aspect of the present invention, the following technical solution is adopted: A preparation method of the above-mentioned gas-water separator, the preparation method includes the following steps:

[0035] Inject the water separator cavity.

[0036] Set a first sealing gasket between the inner cavity of the water separator cavity and the first cover plate.

[0037] After installing the first sealing gasket, maintain nitrogen at a set air pressure, keep the pressure for a set time without pressure drop.

[0038] Inject a thermal insulation material into the cavity.

[0039] Set a second sealing gasket between the outer cavity and the second cover plate.

[0040] After installing the second sealing gasket, maintain nitrogen at a set air pressure, keep the pressure for a set time without pressure drop.

[0041] According to another aspect of the present invention, the following technical solution is adopted: A fuel cell device, the fuel cell device includes the above-mentioned fuel cell gas-water separator.

[0042] The beneficial effects of the present invention are as follows: The gas-water separator, its preparation method, and the fuel cell device proposed by the present invention can improve the separation efficiency and reduce the fluid pressure loss.

[0043] The working principle of the gas-water separator of the present invention is to utilize the different gravities of hydrogen, impurity gas, and liquid droplets themselves. During the process of passing through the baffle, the flow field changes, reducing the forward kinetic energy of the liquid droplets, causing them to fall to the bottom of the cavity of the gas-water separator and gather together; it has the characteristics of high separation efficiency, reducing fluid pressure loss, and small volume; in addition, the integrated gas-water separator with a heatable drain solenoid valve solves the cold start problem of the fuel cell system at low temperatures; moreover, the cavity between the inner cavity and the outer cavity of the gas-water separator is filled with a polymer thermal insulation foam material to avoid a large amount of heat dissipation, ensuring that the fluid entering the anode of the fuel cell stack has a certain temperature and improving the performance of the fuel cell system. Brief Description of the Drawings

[0044] Figure 1 It is a perspective view of the fuel cell gas-water separator in an embodiment of the present invention.

[0045] Figure 2 It is a schematic structural diagram of the cavity of the fuel cell gas-water separator in an embodiment of the present invention.

[0046] Figure 3 It is a cross-sectional view of the cavity of the fuel cell gas-water separator in an embodiment of the present invention.

[0047] The reference numerals are as follows:

[0048] 1. Moisture cavity; 2. First sealing gasket; 3. First cover plate; 4. Second sealing gasket;

[0049] 5. Second cover plate; 6. Heatable drain solenoid valve; 7. Hydrogen return port; 8. Hydrogen inlet;

[0050] 9. Drain outlet; 10. Connection hole; 11. Inlet of the heatable drain solenoid valve; 12. Outer cavity;

[0051] 13. Inner cavity; 14. Cavity; 15. Liquid storage chamber; 16. First-stage baffle;

[0052] 17. Second-stage baffle. Detailed Embodiments

[0053] The preferred embodiments of the present invention will be described in detail below with reference to the drawings.

[0054] To further understand the present invention, the preferred implementation schemes of the present invention will be described below in conjunction with embodiments. However, it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, rather than limiting the claims of the present invention.

[0055] The description of this part is only for several typical embodiments, and the present invention is not limited to the scope described in the embodiments. The mutual replacement of the same or similar prior art means and some technical features in the embodiments is also within the scope of the description and protection of the present invention.

[0056] "Connection" in the specification includes both direct connection and indirect connection.

[0057] The present invention discloses a gas-water separator, which includes: a water separator cavity, a heating and drainage solenoid valve, and a heat preservation material. The water separator cavity includes an inner cavity, an outer cavity, and a cavity; the cavity is arranged between the inner cavity and the outer cavity, and the cavity is filled with the heat preservation material. The bottom of the inner cavity has a liquid storage chamber; the outer cavity is provided with a hydrogen inlet, a hydrogen return port, and a drainage outlet connected to the inner cavity; the inner cavity is provided with a first baffle and a second baffle. A connection hole shell is arranged at the bottom end of the water separator cavity to install the heating and drainage solenoid valve, the inlet of the heating and drainage solenoid valve is connected to the connection hole, and the heating and drainage solenoid valve has functions of timed drainage, exhaust, and efficient heating.

[0058] Figures 1 to 3 Disclosed is the structure of a fuel cell gas-water separator in an embodiment of the present invention; please refer to Figures 1 to 3 , a gas-water separator, which includes: a water separator cavity 1, a heating and drainage solenoid valve 6, and a polymer heat preservation foam material.

[0059] The water separator cavity 1 includes an outer cavity 12, an inner cavity 13, and a cavity 14; the cavity 14 is arranged between the outer cavity 12 and the inner cavity 13, and the cavity 14 is filled with the polymer heat preservation foam material; filling the polymer heat preservation foam material in the cavity 14 of the gas-water separator can avoid a large amount of heat dissipation in low-temperature situations, achieve heat preservation; ensure that the hydrogen returned to the fuel cell stack for reaction meets the optimal temperature requirement of the entire fuel cell system for the hydrogen entering the stack, and optimize the efficiency of the fuel cell system.

[0060] The water separator cavity 1 is provided with a hydrogen inlet 8, a hydrogen return port 7, a drainage outlet 9, a connection hole 10, a liquid storage chamber 15, a first baffle 16, and a second baffle 17. The top of the outer cavity 12 is provided with a hydrogen return port 7, the side is provided with a hydrogen inlet 8, and the bottom is provided with a drainage port 9 and a connection hole 10; the hydrogen inlet 8, the hydrogen return port 7, and the drainage port 9 are connected to the inner cavity 13. The bottom of the inner cavity 13 is provided with a liquid storage chamber 15; the inner cavity 13 is provided with a first baffle 16 and a second baffle 17, the first baffle 16 is arranged close to the hydrogen inlet 8 of the outer cavity 12, and the second baffle 17 is arranged close to the hydrogen return port 7 of the outer cavity 12.

[0061] The first sealing gasket 2 is located between the upper end of the inner cavity 13 and the lower end of the cover plate; the second sealing gasket 4 is located between the upper end of the outer cavity 12 and the lower end of the cover plate.

[0062] The gas-liquid mixture of unreacted hydrogen and water at the anode of the stack enters the inner cavity 13 of the gas-water separator 1 from the hydrogen inlet 8. The gas-liquid mixture undergoes the first gas-liquid separation using the rotary separation principle through the first-stage baffle 16. The first-stage baffle 16 and the arc-shaped wall form a swirling airflow to increase the collision probability of liquid droplets, prompting small liquid droplets to grow into large liquid droplets. After the large liquid droplets are cold-condensed and aggregated, they flow along the wall surface into the liquid storage chamber 15.

[0063] The remaining gas-liquid mixture separated by the first-stage baffle 16 is blocked again by the second-stage baffle 17. The second-stage baffle 17 enables the airflow to move downward along the arc surface, and the liquid droplets gather and drip downward under the action of gravity into the liquid storage chamber 15. The separated hydrogen, due to its relatively small density, returns to the stack through the hydrogen return port 7 with the airflow for reaction.

[0064] In one embodiment, the first-stage baffle 16 is provided with a first attitude adjustment mechanism for adjusting the attitude of the first-stage baffle 16 in the inner cavity 13; the second-stage baffle 17 is provided with a second attitude adjustment mechanism for adjusting the attitude of the second-stage baffle 17 in the inner cavity 13. A medium flow rate detection module is provided in the water separator cavity 1 for detecting the fluid condition in the water separator cavity 1. The first attitude adjustment mechanism is used to adjust the attitude of the first baffle 16 in the inner cavity 13 according to the fluid condition detected by the water separator cavity 1, and the second attitude adjustment mechanism is used to adjust the attitude of the second-stage baffle 17 in the inner cavity 13 according to the fluid condition detected by the water separator cavity 1. The fluid condition may include at least one of the temperature, pressure, flow rate, and humidity of the fluid; the attitude may include at least one of the position of the corresponding baffle in the set area and the arc surface radian.

[0065] A connection hole 10 is provided at the bottom end of the water separator cavity 1. The heating and drainage solenoid valve 6 is connected to the water separator cavity 1 through the connection hole 10. The heating and drainage solenoid valve 6 is provided with a heating and drainage solenoid valve inlet 11, and the heating and drainage solenoid valve inlet 11 is connected to the connection hole. The liquid water stored in the liquid storage chamber 15 flows into the heating and drainage solenoid valve inlet 11 through the water flow channel. The heating and drainage solenoid valve 6 has functions of timed drainage, exhaust, and efficient heating.

[0066] The heating and drainage solenoid valve 6 has a drainage port 9. The heating and drainage solenoid valve 6 is controlled by the control device to open the drainage port, thereby discharging the water in the liquid storage chamber 15 in a timely manner.

[0067] The heating and drainage solenoid valve 6 also has a heating function. When the ambient temperature is below 0 degrees Celsius, the water in the liquid storage chamber 15 has a risk of freezing. The heating and drainage solenoid valve 6 is controlled by the control device to turn on the heating function to solve the cold start problem of the fuel cell system at low temperatures.

[0068] The water separator cavity 1 is an injection molded part; a first sealing gasket 2 is provided between the inner cavity 13 and the first cover plate 3; the first sealing gasket 2 protrudes 0.5 mm above the installation groove; after installing the first sealing gasket 2, maintain a nitrogen pressure of 2 bar for 10 minutes without pressure drop; inject a polymer thermal insulation foam material into the cavity 14; a second sealing gasket 4 is provided between the outer cavity 12 and the second cover plate 5; the thickness of the second sealing gasket 4 is 1 mm; after installing the second sealing gasket 4, maintain a nitrogen pressure of 2 bar for 10 minutes without pressure drop.

[0069] The present invention further discloses a preparation method of the above-mentioned gas-water separator, and the preparation method includes the following steps:

[0070] Inject the water separator cavity 1; set a first sealing gasket 2 between the inner cavity 13 of the water separator cavity 1 and the first cover plate 3; in one embodiment, the first sealing gasket 2 protrudes 0.5 mm above the installation groove;

[0071] After installing the first sealing gasket 2, maintain a nitrogen pressure of 2 bar (it can also be other set pressures, such as it can be under a pressure of 1.8 - 3 bar) for 10 minutes (it can also be other times, such as it can be 5 - 60 minutes) without pressure drop; inject a polymer thermal insulation foam material into the cavity 14;

[0072] Set a second sealing gasket 4 between the outer cavity 12 and the second cover plate 5; in one embodiment, the thickness of the second sealing gasket 4 is 1 mm; after installing the second sealing gasket 4, maintain a nitrogen pressure of 2 bar (it can also be other set pressures, such as it can be under a pressure of 1.8 - 3 bar) for 10 minutes (it can also be other times, such as it can be 5 - 60 minutes) without pressure drop.

[0073] The present invention further discloses a fuel cell device, and the fuel cell device includes the above-mentioned fuel cell gas-water separator.

[0074] In summary, the gas-water separator, its preparation method, and the fuel cell device proposed by the present invention can improve the separation efficiency and reduce the fluid pressure loss.

[0075] The technical features of the above-mentioned embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as the combinations of these technical features do not conflict, they should all be considered as the scope described in this specification.

[0076] The description and application of the present invention herein are illustrative and are not intended to limit the scope of the present invention to the above embodiments. The effects or advantages involved in the embodiments may not be reflected in the embodiments due to various factors, and the description of the effects or advantages is not used to limit the embodiments. Variations and changes to the disclosed embodiments are possible, and various components of substitution and equivalence of the embodiments are known to those of ordinary skill in the art. Those skilled in the art should be clear that the present invention can be implemented in other forms, structures, arrangements, proportions, and with other components, materials, and parts without departing from the spirit or essential characteristics of the present invention. Other variations and changes can be made to the disclosed embodiments without departing from the scope and spirit of the present invention.

Claims

1. A gas-water separator, characterized in that, The gas-water separator includes: a water separator cavity, a heating and drainage solenoid valve, and a heat-insulating material; The gas-water separator cavity includes an inner cavity, an outer cavity, and a cavity; the cavity is arranged between the inner cavity and the outer cavity, and the cavity is filled with a heat-insulating material; The bottom of the inner cavity has a liquid storage chamber; the outer cavity is provided with a hydrogen inlet, a hydrogen return port, and a drainage outlet connected to the inner cavity; the inner cavity is provided with a first baffle and a second baffle; A connection hole shell is provided at the bottom end of the water separator cavity to install a heating and drainage solenoid valve. The inlet of the heating and drainage solenoid valve is connected to the connection hole, and the heating and drainage solenoid valve has functions of timed drainage, exhaust, and efficient heating.

2. The gas-water separator according to claim 1, wherein: The water separator cavity is a hydrophobic plastic injection molding.

3. The gas-water separator according to claim 1, wherein: The polymer heat-insulating foam material filled between the inner cavity and the outer cavity of the water separator has a low thermal conductivity; a large service temperature range; small deformation, and is corrosion-resistant and not easily aged.

4. The gas-water separator according to claim 1, wherein: The first baffle is arranged near the hydrogen inlet of the outer cavity; the second baffle is arranged near the hydrogen return port of the outer cavity.

5. The gas-water separator according to claim 1, wherein: A connection hole is provided at the bottom of the outer cavity of the water separator to install a heating and drainage solenoid valve.

6. The gas-water separator according to claim 1, wherein: The water separator cavity is an injection molding; a first sealing gasket is provided between the inner cavity and the first cover plate; the first sealing gasket protrudes 0.5 mm above the installation groove; after installing the first sealing gasket, maintain a nitrogen pressure of 2 bar for 10 minutes without pressure drop; the cavity is injected with polymer heat-insulating foam material; a second sealing gasket is provided between the outer cavity and the second cover plate; the thickness of the second sealing gasket is 1 mm; after installing the second sealing gasket, maintain a nitrogen pressure of 2 bar for 10 minutes without pressure drop.

7. The gas-water separator according to claim 1, wherein: The first baffle is provided with a first attitude adjustment mechanism for adjusting the attitude of the first baffle in the inner cavity; the second baffle is provided with a second attitude adjustment mechanism for adjusting the attitude of the second baffle in the inner cavity; A medium flow detection module is provided in the water separator cavity for detecting the fluid condition in the water separator cavity; the first attitude adjustment mechanism is used to adjust the attitude of the first baffle in the inner cavity according to the fluid flow detected by the water separator cavity, and the second attitude adjustment mechanism is used to adjust the attitude of the second baffle in the inner cavity according to the fluid flow detected by the water separator cavity; The fluid condition includes at least one of the temperature, pressure, flow rate, and humidity of the fluid; the attitude includes at least one of the position of the corresponding baffle in the set area and the arc curvature.

8. A method for preparing the gas-water separator according to any one of claims 1 to 7, characterized in that, The preparation method includes the following steps: Inject the water separator cavity; Set a first sealing gasket between the inner cavity of the water separator cavity and the first cover plate; After installing the first sealing gasket, maintain nitrogen at a set pressure, keep the pressure for a set time without pressure drop; Inject a heat-insulating material into the cavity; Set a second sealing gasket between the outer cavity and the second cover plate; After installing the second sealing gasket, maintain nitrogen at the set air pressure for the set holding time without pressure drop.

9. A fuel cell device, characterized in that, The fuel cell device includes the gas-water separator according to any one of claims 1 to 7.

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