Air cooling device of fuel cell system using hydrogen gas

Abstract

The present invention relates to an air cooling device of a fuel cell system, using hydrogen gas and, more specifically, to an air cooling device of a fuel cell system, using hydrogen gas, the air cooling device comprising: a first cooling jacket which accommodates a motor of an air blower supplying air (Air) to a fuel cell stack and has a first hydrogen passage (HP1) through which hydrogen supplied by a hydrogen supply unit passes; a first hydrogen pipe having one end connected to the first cooling jacket; and a second cooling jacket including a second hydrogen passage (HP2) and a first air passage (AP1), wherein the second hydrogen passage (HP2) is connected to the other end of the first hydrogen pipe (20) to allow the hydrogen having passed through the first hydrogen passage (HP1) to pass therethrough, and is connected to the fuel cell stack, and the first air passage (AP1) is surrounded by the second hydrogen passage (HP2) and allows the air (Air) supplied by the air blower to pass therethrough, and is connected to the fuel cell stack.

Description

Air cooling device for fuel cell systems using hydrogen gas

[0001] The present invention relates to an air cooling device for a fuel cell system using hydrogen gas.

[0002] Fuel cell systems are divided into air-cooled fuel cell systems that supply air to the fuel cell stack and water-cooled fuel cell systems that supply water to the fuel cell stack, depending on the cooling method.

[0003] Additionally, the fuel cell system consists of a fuel cell stack, peripheral devices for stack operation (Balance of Plant, BOP), and a system controller that controls the overall operation of the system.

[0004] The peripheral devices of the fuel cell system (Balance of Plant, BOP) are composed of a hydrogen supply device (Fuel Process System, FPS) that supplies hydrogen gas (H2) as fuel to the fuel cell stack, an air supply device (Air Process System, APS) that supplies oxygen necessary for the reaction, and a thermal management system (Thermal Management System, TMS) that controls the operating temperature of the fuel cell stack.

[0005] In a fuel cell system with high power generation, not only the fuel cell stack where power generation takes place, but also peripheral devices (Balance of Plant, BOP) are essential components for efficient and stable power generation of the fuel cell stack.

[0006] However, if the temperature of the inlet air of the fuel cell system increases, the relative humidity decreases, making the inside of the fuel cell stack very dry, which may cause irreversible damage to the fuel cell stack.

[0007] Therefore, it is necessary to develop an air cooling device for a fuel cell stack to prevent irreversible damage to the fuel cell stack due to high-temperature air.

[0008] The present invention has been devised to solve the above problems, and the present invention provides an air cooling device that can prevent irreversible damage to the fuel cell stack by high-temperature air by lowering the temperature of air supplied to the fuel cell stack from an air blower using hydrogen gas (H2) supplied to the fuel cell stack.

[0009] The problems to be solved by the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description below.

[0010] According to one embodiment of the present invention, a fuel cell system air cooling device using hydrogen gas may include a first cooling jacket in which a motor of an air blower supplying air (Air) to a fuel cell stack is accommodated and a first hydrogen passage (HP1) through which hydrogen supplied from a hydrogen supply unit passes is formed, a first hydrogen pipe having one end connected to the first cooling jacket, a second hydrogen passage (HP2) connected to the other end of the first hydrogen pipe (20) through which hydrogen passing through the first hydrogen passage (HP1) passes and which is connected to the fuel cell stack, and a second cooling jacket having a first air passage (AP1) surrounded by the second hydrogen passage (HP2) and through which air supplied from the air blower passes and which is connected to the fuel cell stack is formed.

[0011] Additionally, the first cooling jacket may include a first cooling member having one end coupled to the air blower and through which hydrogen gas (H2) is introduced and discharged via a first hydrogen passage (HP1), and a second cooling member having one end coupled to the air blower at a distance from the first cooling member so as to form the first hydrogen passage (HP1) and accommodating a motor of the air blower.

[0012] Additionally, the first cooling member may include a first cooling member body having one end coupled to an air blower, a first hydrogen inlet formed on a side surface of the first cooling member body, and a second hydrogen inlet formed on the side surface of the first cooling member body spaced apart from the first hydrogen inlet.

[0013] Additionally, the second cooling member may include a second cooling member body having a hollow portion formed to be coupled to an air blower at one end and to accommodate a motor, and a second cooling protrusion formed to protrude from the second cooling member body.

[0014] In addition, the second cooling jacket may include a 21st cooling member having a 21st hydrogen passage (HP21) connected to the other end of the 1st hydrogen pipe and through which hydrogen passes to form a second hydrogen passage (HP2), a 21st air passage (AP21) formed by surrounding the 21st hydrogen passage (HP21) and through which air (Air) supplied from an air blower passes to form a first air passage (AP1), a 22nd cooling member connected to the 21st cooling member and fluidly connected to the 21st air passage (AP21) and forming a 22nd air passage (AP22) formed to form the first air passage (AP1), and a 23rd cooling member connected to the 21st cooling member and fluidly connected to the 21st hydrogen passage (HP21) and forming a second hydrogen passage (HP2), the 22nd hydrogen passage (HP22) formed between the 22nd cooling member (32).

[0015] In addition, the 21st cooling member may include a 211th cooling member body having a 211th hydrogen passage (HP21) formed therein, a 211th hydrogen inlet formed on a side of the 211th cooling member body and connected to a first hydrogen pipe, and a 212th cooling member having a 211th air passage (AP21) formed therein, which is accommodated in the 21st hydrogen passage (HP21) of the 211th cooling member body and through which air (Air) supplied from an air blower passes.

[0016] Additionally, an air flow control valve installed in the 21st air passage (AP21) of the 212th cooling member may be further included.

[0017] Additionally, the 23rd cooling member may include a 231st cooling member body connected to the 21st cooling member and having a 22nd hydrogen passage (AP22) formed therein, and a 231st hydrogen discharge member including a 23rd hydrogen discharge port protruding from the 231st cooling member body and formed at the other end.

[0018] In addition, a third cooling jacket may further be included, which is connected to the second hydrogen passage (HP1) of the second cooling jacket and has a third hydrogen passage (HP3) formed in a joining groove formed in the end plate (3a) of the fuel cell stack.

[0019] According to an air cooling device for a fuel cell system using hydrogen gas according to one embodiment of the present invention, the temperature of air supplied from an air blower to a fuel cell stack is lowered using hydrogen supplied to the fuel cell stack, thereby preventing irreversible damage to the fuel cell stack caused by high-temperature air.

[0020] In addition, according to the air cooling device for a fuel cell system using hydrogen gas according to one embodiment of the present invention, a plurality of parts can be made into one module, so that the air cooling device can be miniaturized, and a compact fuel cell stack with a reduced overall volume can be provided.

[0021] FIG. 1 is a block diagram schematically showing a fuel cell system to which an air cooling device is applied for a fuel cell system using hydrogen gas according to a first embodiment of the present invention.

[0022] FIG. 2 is a perspective view of an air cooling device of a fuel cell system using hydrogen gas according to a first embodiment of the present invention.

[0023] FIG. 3 is an exploded perspective view of the first cooling jacket of the air cooling device of the fuel cell system using hydrogen gas of FIG. 2.

[0024] Figure 4 is a cross-sectional view of the first cooling jacket of Figure 3.

[0025] Fig. 5 is an exploded perspective view of the second cooling jacket of the air cooling device of the fuel cell system using hydrogen gas of Fig. 2.

[0026] Figure 6 is a cross-sectional view of the second cooling jacket of Figure 5.

[0027] Fig. 7 is a cross-sectional view of the 21st cooling member of the second cooling jacket of Fig. 5.

[0028] Fig. 8 is a cross-sectional view of the 22nd cooling member and the 23rd cooling member of the 2nd cooling jacket of Fig. 5 combined.

[0029] Fig. 9 is a perspective view of an air cooling device of a fuel cell system using hydrogen gas according to a second embodiment of the present invention.

[0030] Fig. 10 is an exploded perspective view of an air cooling device of a fuel cell system using hydrogen gas of Fig. 9.

[0031] Fig. 11 is a cross-sectional view of an air cooling device of a fuel cell system using hydrogen gas of Fig. 9.

[0032] The advantages and features of the present invention, and the methods for achieving them, will become clearer with reference to the embodiments described below in detail, along with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and may be implemented in various different forms.

[0033] Hereinafter, the technical features of the present invention will be described in detail with reference to the attached drawings.

[0034] FIG. 1 is a block diagram schematically showing a fuel cell system to which an air cooling device of a fuel cell system using hydrogen gas according to a first embodiment of the present invention is applied, and FIG. 2 is a perspective view of an air cooling device of a fuel cell system using hydrogen gas according to the first embodiment of the present invention.

[0035] Referring to FIGS. 1 and 2, the air cooling device (100) of the fuel cell system using hydrogen gas according to the present embodiment may include a first cooling jacket (10), a first hydrogen pipe (20), and a second cooling jacket (30).

[0036] A first hydrogen passage (HP1) may be formed in the first cooling jacket (10) according to the present embodiment, and a motor (2a) of an air blower (2) that supplies air (Air) to the fuel cell stack (3) may be accommodated in the first cooling jacket (10).

[0037] According to this embodiment, excessive temperature rise of air (Air) caused by the motor (2a) of the air blower (2) can be prevented by the first cooling jacket (10) in which the first hydrogen passage (HP1) is formed.

[0038] In detail, according to the present embodiment, the heat generated from the motor (2a) of the air blower (2) accommodated in the first cooling jacket (10) is absorbed by the hydrogen gas (H2) supplied from the hydrogen supply unit (1) and passing through the first hydrogen passage (HP1), and thus the temperature of the air (Air) supplied from the air blower (2) to the fuel cell stack (3) can be prevented from rising excessively due to the heat generated by the operation of the motor (2a) of the air blower (2).

[0039] According to the present embodiment, one end of the hydrogen pipe (20) is connected to the first cooling jacket (10) and the other end is connected to the second cooling jacket (30), and hydrogen gas (H2) passing through the first hydrogen passage (HP1) of the first cooling jacket (10) can move to the second cooling jacket (30) through the hydrogen pipe (20).

[0040] In addition, a second cooling jacket (30) according to the present embodiment may be connected to the other end of the first hydrogen pipe (20) to form a second hydrogen passage (HP2) through which hydrogen gas (H2) passing through the first hydrogen passage (HP1) passes and is connected to the fuel cell stack (3).

[0041] In addition, a second cooling jacket (30) according to the present embodiment may be formed with a first air passage (AP1) that is surrounded by a second hydrogen passage (HP2) and through which air (Air) supplied from an air blower (1) passes and is connected to a fuel cell stack (3).

[0042] According to this embodiment, the temperature of air (Air) supplied from the air blower (1) can be lowered by the second cooling jacket (10) in which the second hydrogen passage (HP2) and the first air passage (AP1) are formed.

[0043] In detail, according to the present embodiment, when air (Air) supplied from an air blower (1) passes through a first air passage (AP1), the heat of the air (Air) supplied from the air blower (2) is absorbed by hydrogen gas (H2) passing through a second hydrogen passage (HP2) surrounding the first air passage (AP1), so that the temperature of the air (Air) can be lowered.

[0044] Therefore, according to the air cooling device (100) of the fuel cell system using hydrogen gas according to the present embodiment, the heat generated by the operation of the motor (2a) of the air blower (2) is absorbed by the first cooling jacket (10), thereby preventing excessive temperature rise of the air (Air), and the temperature of the air (Air) supplied from the air blower (2) is lowered by the second cooling jacket (30), thereby supplying the air (Air) to the fuel cell stack (3), thereby preventing the inside of the fuel cell stack (3) from being dried by the high-temperature air (Air), thereby preventing irreversible damage to the fuel cell stack (3).

[0045] FIG. 3 is an exploded perspective view of the first cooling jacket of the air cooling device of the fuel cell system using hydrogen gas of FIG. 2, and FIG. 4 is a cross-sectional view of the first cooling jacket of FIG. 3.

[0046] Referring to FIGS. 3 and 4, the first cooling jacket (10) according to the present embodiment may include a first cooling member (11) and a second cooling member (12).

[0047] The first cooling member (11) according to the present embodiment is connected at one end to an air blower (2) and hydrogen gas (H2) can be introduced into and discharged from the first hydrogen passage (HP1).

[0048] In addition, the second cooling member (12) may be connected at one end to the air blower at a distance from the first cooling member (11), so that a first hydrogen passage (HP1) may be formed between the first cooling member (11) and the second cooling member (12), and the motor (2a) of the air blower (2) may be accommodated in the second cooling member (12).

[0049] The first cooling member (11) according to the present embodiment may include a first cooling member body (111) having one end coupled to an air blower (2), a first hydrogen inlet (112) formed on a side of the first cooling member body (111), and a first hydrogen outlet (113) formed on a side of the first cooling member body (111) spaced apart from the first hydrogen inlet.

[0050] In addition, the second cooling member (12) according to the present embodiment may include a second cooling member body (121) having a hollow portion formed by being coupled to an air blower (2) at one end and accommodating a motor (2a), and a second cooling protrusion (122) formed by protruding from the second cooling member body (121).

[0051] According to the present embodiment, hydrogen gas (H2) supplied from the hydrogen supply unit (1) may be introduced through the first hydrogen inlet (112), pass through the first hydrogen passage (HP1) formed between the first cooling member (11) and the second cooling member (12), that is, between the first cooling member body (111) and the second cooling member body (121), and then be discharged through the first hydrogen outlet (113).

[0052] Here, heat generated from the motor (2a) accommodated in the second cooling member body (121) can be absorbed by hydrogen gas (H2) passing through the first hydrogen passage (HP1) according to the present embodiment.

[0053] In addition, the contact area of ​​hydrogen gas (H2) is increased by the second cooling protrusion (122) protruding from the second cooling member body (121) according to the present embodiment, so that the heat dissipation efficiency by hydrogen gas (H2) can be improved.

[0054] Ultimately, according to the present embodiment, the heat generated by the operation of the motor (2a) of the air blower (2) is absorbed by the first cooling jacket (10), thereby preventing excessive temperature rise of the air (Air) discharged from the air blower (2).

[0055] FIG. 5 is an exploded perspective view of a second cooling jacket of an air cooling device of a fuel cell system using hydrogen gas of FIG. 2, and FIG. 6 is a cross-sectional view of the second cooling jacket of FIG. 5.

[0056] Referring to FIGS. 5 and 6, the second cooling jacket (30) according to the present embodiment may include a 21st cooling member (31), a 22nd cooling member (32), and a 23rd cooling member (33).

[0057] The 21st cooling member (31) according to the present embodiment can be connected to the other end of the first hydrogen pipe (20), and a 21st hydrogen passage (HP21) through which hydrogen gas (H2) passes and forms a second hydrogen passage (HP2) can be formed in the 21st cooling member (31).

[0058] In addition, a 21st air passage (AP21) may be formed in the 21st cooling member (31) surrounded by a 21st hydrogen passage (HP21) and through which air (Air) supplied from an air blower (2) passes to form a first air passage (AP1).

[0059] The 22nd cooling member (32) according to the present embodiment can be connected to the 21st cooling member (31), and the 22nd cooling member (32) can be formed with a 22nd air passage (AP22) that is fluidly connected to the 21st air passage (AP21) and forms the first air passage (AP1).

[0060] In addition, the 23rd cooling member (33) according to the present embodiment can be connected to the 21st cooling member (31), and the 23rd cooling member (33) can be formed with a 22nd hydrogen passage (HP22) that is fluidly connected to the 21st hydrogen passage (HP21) and forms the second hydrogen passage (HP2).

[0061] Below, the mechanism by which the temperature of air (Air) supplied by the air blower is lowered by each of the components forming the second cooling jacket (30) according to the present embodiment is described in detail.

[0062] FIG. 7 is a cross-sectional view of the 21st cooling member of the second cooling jacket of FIG. 5, and FIG. 8 is a cross-sectional view of the 22nd cooling member and the 23rd cooling member of the second cooling jacket of FIG. 5 combined.

[0063] The 21st cooling member (31) according to the present embodiment may include a 211th cooling member (311) and a 212th cooling member (312).

[0064] Additionally, the 211th cooling member (311) may include a 211th cooling member body (3111) in which a 21st hydrogen passage (HP21) is formed and a 211th hydrogen inlet (3112) formed on a side of the 211th cooling member body (3111) and to which a first hydrogen pipe is connected.

[0065] In addition, the 212th cooling member (312) may be accommodated in the 21st hydrogen passage (HP21) of the 211th cooling member body (3111), and a 21st air passage (AP21) through which air (Air) supplied from an air blower (2) passes may be formed on the inside of the 212th cooling member (312).

[0066] The 23rd cooling member (33) according to the present embodiment may be connected to the 21st cooling member (31), and may include a 231st cooling member body (331) in which a 22nd hydrogen passage (AP22) is formed, and a 231st hydrogen discharge member (332) that protrudes from the 231st cooling member body (331) and includes a 23rd hydrogen discharge port (3321) formed at the other end.

[0067] According to the present embodiment, air (Air) supplied from the air blower (2) passes through the 21st air passage (AP21) formed on the inside of the 212th cooling member (312), and hydrogen gas (H2) supplied through the first hydrogen pipe (20) from the first hydrogen passage (HP1) of the first cooling jacket (10) can pass through the 21st hydrogen passage (HP21) of the 211th cooling member body (3111) in which the 212th cooling member (312) is accommodated.

[0068] Therefore, according to the present embodiment, the heat of the air (Air) passing through the 21st air passage (AP21) can be absorbed by the hydrogen gas (H2) passing through the 21st hydrogen passage (HP21), thereby lowering the temperature of the air (Air).

[0069] In addition, according to the present embodiment, air (Air) passing through the 21st air passage (AP21) can be supplied to the fuel cell stack (3) by passing through the 22nd air passage (AP22) formed in the 22nd cooling member (32) and fluidly connected to the 21st air passage (AP21).

[0070] Additionally, hydrogen gas (H2) passing through the 21st hydrogen passage (HP21) can be supplied to the fuel cell stack (3) by passing through the 22nd hydrogen passage (HP22) formed in the 231st cooling member body (331) in which the 22nd cooling member (32) is accommodated.

[0071] Therefore, according to the present embodiment, the heat of the air (Air) passing through the 22nd air passage (AP22) can be absorbed by the hydrogen gas (H2) passing through the 22nd hydrogen passage (HP22), thereby lowering the temperature of the air (Air) supplied to the fuel cell stack.

[0072] Ultimately, according to the air cooling device (100) of the fuel cell system using hydrogen gas according to the present embodiment, the heat generated by the operation of the motor (2a) of the air blower (2) is absorbed by the first cooling jacket (10), thereby preventing excessive temperature rise of the air (Air), and the temperature of the air (Air) supplied from the air blower (2) is lowered by the second cooling jacket (30), thereby supplying the air (Air) to the fuel cell stack (3), thereby preventing the inside of the fuel cell stack (3) from being dried by the high-temperature air (Air), thereby preventing irreversible damage to the fuel cell stack (3).

[0073] The air cooling device (100) of the fuel cell system using hydrogen gas (H2) according to the present embodiment may further include an air flow control valve (313) installed in the 21st air passage (AP21) of the 212th cooling member (312).

[0074] Accordingly, since the 212th cooling member (312) can be installed inside the 211th cooling member (311) and the air flow control valve (313) can be installed inside the 212th cooling member (312), according to one embodiment of the present invention, a plurality of components can be combined into one module, and a miniaturized fuel cell system with a miniaturized air cooling device and a miniaturized modularized air cooling device can be provided.

[0075] Fig. 10 is an exploded perspective view of an air cooling device of a fuel cell system using hydrogen gas of Fig. 9, and Fig. 11 is a cross-sectional view of an air cooling device of a fuel cell system using hydrogen gas of Fig. 9.

[0076] Referring to FIGS. 10 and 11, the air cooling device (200) of a fuel cell system using hydrogen gas according to the second embodiment of the present invention may include a first cooling jacket (210), a first hydrogen pipe (220), a second cooling jacket (230) including a twenty-first cooling member (231), a twenty-second cooling member (232), and a twenty-third cooling member (233), and a third cooling jacket (240).

[0077] Here, the air cooling device (200) of the fuel cell system using hydrogen gas according to the present embodiment has the same configuration as the air cooling device (100) of the fuel cell system using hydrogen gas according to the first embodiment of the present invention, except for the third cooling jacket (240).

[0078] Therefore, in the following, a detailed description of the same configuration as the air cooling device (100) of the fuel cell system using hydrogen gas according to the first embodiment of the present invention will be omitted.

[0079] The third cooling jacket (240) according to the present embodiment has a third hydrogen passage (HP3) formed therein and can be connected to the second hydrogen passage (HP1) of the second cooling jacket (230).

[0080] Additionally, the third cooling jacket (240) can be installed in a joining groove (3a1) formed in the end plate (3a) of the fuel cell stack (3).

[0081] Additionally, the third hydrogen passage (HP3) formed in the third cooling jacket (240) is fluidly connected to the second hydrogen passage (HP1) of the second cooling jacket (230), so that hydrogen gas (H2) passing through the second hydrogen passage (HP1) can pass through.

[0082] According to this embodiment, hydrogen passing through the third hydrogen passage (HP3) of the third cooling jacket (240) absorbs heat generated in the fuel cell stack (3) and transferred to the end plate (3a), thereby preventing a temperature rise due to operation of the fuel cell stack (3).

[0083] In addition, since the third cooling jacket (240) through which hydrogen gas (H2) is supplied to the fuel cell stack (3) is not installed outside the fuel cell stack (3) but is inserted into the end plate (3a), the fuel cell system can be made compact and its volume can be reduced according to the present embodiment.

[0084] Therefore, according to the air cooling device (200) of the fuel cell system using hydrogen gas according to the present embodiment, the temperature of the fuel cell stack (3) in operation can be lowered by absorbing the heat generated in the fuel cell stack (3), and a compact fuel cell stack with a reduced overall volume can be provided.

[0085] Although the present invention has been described with reference to specific embodiments, those skilled in the art will appreciate that the present invention can be implemented in other specific forms without altering the technical concept or essential features thereof. Therefore, the embodiments described above should be understood to be illustrative in all respects and not restrictive.

Claims

1. A first cooling jacket in which a motor of an air blower supplying air to a fuel cell stack is accommodated and a first hydrogen passage (HP1) through which hydrogen gas (H2) supplied from a hydrogen supply unit passes is formed; A first hydrogen pipe having one end connected to the first cooling jacket; An air cooling device for a fuel cell system using hydrogen gas, comprising: a second cooling jacket connected to the other end of the first hydrogen pipe, through which the low-temperature hydrogen passing through the first hydrogen passage (HP1) passes and is connected to the fuel cell stack; and a first air passage (AP1) formed by being surrounded by the second hydrogen passage (HP2) and through which the air supplied from the air blower passes and is connected to the fuel cell stack.

2. In paragraph 1, The above first cooling jacket, A first cooling member having one end connected to the air blower and through which hydrogen gas (H2) is introduced and discharged through the first hydrogen passage (HP1); and An air cooling device for a fuel cell system using hydrogen gas, comprising: a second cooling member having one end connected to the air blower at a distance from the first cooling member so as to form the first hydrogen passage (HP1) and accommodating the motor of the air blower; 3. In paragraph 2, The above first cooling member, An air cooling device for a fuel cell system using hydrogen gas, comprising: a first cooling member body having one end coupled to the air blower; a first hydrogen inlet formed on a side surface of the first cooling member body; and a second hydrogen inlet formed on a side surface of the first cooling member body spaced apart from the first hydrogen inlet.

4. In paragraph 2, The above second cooling member, An air cooling device for a fuel cell system using hydrogen gas, comprising a second cooling member body having one end coupled to the air blower and a hollow portion formed to accommodate the motor, and a second cooling projection formed to protrude from the second cooling member body.

5. In paragraph 1, The above second cooling jacket, A 21st cooling member having a 21st hydrogen passage (HP21) connected to the other end of the first hydrogen pipe and through which the hydrogen gas (H2) passes and forms the second hydrogen passage (HP2), and a 21st air passage (AP21) surrounded by the 21st hydrogen passage (HP21) and through which the air (Air) supplied from the air blower passes and forms the first air (Air) passage (AP1); A 22nd cooling member having a 22nd air passage (AP22) formed therein, which is connected to the 21st cooling member and fluidly connected to the 21st air passage (AP21) and forms the first air passage (AP1); and An air cooling device for a fuel cell system using hydrogen gas, comprising a 23rd cooling member connected to the 21st cooling member, accommodating the 22nd cooling member, and having a 22nd hydrogen passage (HP22) formed therein, the 23rd cooling member being fluidly connected to the 21st hydrogen passage (HP21) and forming the 2nd hydrogen passage (HP2).

6. In paragraph 5, The above 21st cooling member is, A 211th cooling member including a 211th cooling member body having the 21st hydrogen passage (HP21) formed therein and a 211th hydrogen inlet formed on a side of the 211th cooling member body and to which the first hydrogen pipe is connected; and An air cooling device for a fuel cell system using hydrogen gas, including a 212th cooling member having a 21st air passage (AP21) formed on the inside thereof, through which air (Air) supplied from the air blower passes and which is accommodated in the 21st hydrogen passage (HP21) of the 211th cooling member body.

7. In paragraph 6, An air cooling device for a fuel cell system using hydrogen gas, further comprising an air flow control valve installed in the 21st air passage (AP21) of the above 212th cooling member.

8. In paragraph 5, The above 23rd cooling member is, An air cooling device for a fuel cell system using hydrogen gas, comprising a 231st cooling member body connected to the 21st cooling member and having the 22nd hydrogen passage (HP22) formed therein, and a 231st hydrogen discharge member protruding from the 231st cooling member body and having a 23rd hydrogen discharge port formed at the other end.

9. In paragraph 1, An air cooling device for a fuel cell system using hydrogen gas, further comprising a third cooling jacket having a third hydrogen passage (HP3) formed therein, the third hydrogen passage (HP3) being connected to the second hydrogen passage (HP1) of the second cooling jacket and installed in a joining groove formed in an end plate (3a) of a fuel cell stack.

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