Fuel cell humidifier having bypass-type baffle

Abstract

The present invention relates to a fuel cell humidifier having a bypass-type baffle, the humidifier being characterized by comprising: a mid-case having an exhaust gas inlet through which exhaust gas discharged from a fuel cell stack flows in and an exhaust gas outlet for discharging the exhaust gas; a cartridge disposed inside the mid-case and including an inner case in which a humidification film is disposed and a fixing unit for fixing the humidification film from one side and the other side of the inner case; a bypass flow path formed between the inner wall of the mid-case and the outside of the inner case; and a baffle that is disposed in an inner space of the mid-case and partitions the bypass flow path, wherein the baffle is provided with a movement hole through which a fluid moves.

Description

Humidifier for fuel cells with bypass baffle

[0001] The present invention relates to a fuel cell humidifier equipped with a bypass-type baffle, and more particularly, to a fuel cell humidifier equipped with a bypass-type baffle capable of reducing differential pressure by bypassing exhaust gas through a bypass path and increasing the effective area of ​​a humidifying film by diversifying the fluid movement path through the baffle.

[0002] A fuel cell is a power-generating battery that combines hydrogen and oxygen to produce electricity. Unlike conventional chemical cells like batteries or accumulators, fuel cells can continuously produce electricity as long as hydrogen and oxygen are supplied. They also have the advantage of no heat loss, making them about twice as efficient as internal combustion engines.

[0003] A fuel cell system includes a stack, which is an electricity-generating assembly of unit fuel cells composed of an air electrode and a fuel electrode, an air supply device for supplying air to the air electrode of the fuel cell, and a hydrogen supply device for supplying hydrogen to the fuel electrode of the fuel cell.

[0004] In order for the ion exchange membrane of the membrane-electrode assembly (MEA) of the polymer fuel cell of the fuel cell system to function smoothly, an appropriate amount of moisture is required, and for this purpose, a humidifier is provided in the air supply device of the fuel cell system to humidify the air supplied to the fuel cell.

[0005] The humidifier uses the moisture in the high-temperature, humid exhaust gas discharged from the cathode of the fuel cell to humidify the dry gas supplied through the air compressor of the air supply device, and supplies the humidified air to the cathode of the fuel cell.

[0006] Fuel cell humidifiers utilize a membrane humidification method. These humidifiers achieve membrane humidification through a gas-to-gas moisture exchange process between the high-temperature, humid exhaust gas discharged from the fuel cell's cathode and the dry gas supplied by the air compressor.

[0007] A fuel cell humidifier may include a cartridge in which a humidifying membrane composed of hollow fiber membranes is arranged as a unit module. Drying gas passes through the hollow fiber membranes through one side and the other side of the cartridge, and an opening (window) is provided on the side of the cartridge that opens to the outside.

[0008] Exhaust gas flows into the cartridge through the above-mentioned opening of the cartridge, and the exhaust gas flowing into the cartridge exchanges moisture with the dry gas passing through the hollow fiber membrane.

[0009] However, cartridges like this have the following problems. Generally, the openings on the side of the cartridge are formed at the point where the exhaust gas flows in, and as the flow rate increases due to concentration at the point where the exhaust gas flows in, the humidifying film is damaged, which reduces durability.

[0010] Additionally, because the flue gas path within the cartridge is fixed, the membrane is not uniformly utilized in sections where the flue gas path is not formed within the cartridge. This reduces the effective membrane area, reducing humidification efficiency and increasing differential pressure.

[0011] The present invention is intended to solve the above-described problem, and more specifically, relates to a fuel cell humidifier equipped with a bypass-type baffle capable of reducing differential pressure by bypassing exhaust gas through a bypass path and increasing the effective area of ​​a humidifying film by diversifying the fluid movement path through a baffle.

[0012] The above-described fuel cell humidifier having a bypass-type baffle of the present invention is a fuel cell humidifier, comprising: a mid-case having an exhaust gas inlet for introducing exhaust gas discharged from a fuel cell stack and an exhaust gas outlet for discharging the exhaust gas; an inner case in which a humidifying membrane is disposed, and a cartridge including fixing members for fixing the humidifying membrane at one side and the other side of the inner case, the cartridge being disposed inside the mid-case; a bypass channel formed between an inner wall of the mid-case and an outer side of the inner case; and a baffle disposed in an inner space of the mid-case and partitioning the bypass channel, wherein the baffle is characterized in that a moving hole through which a fluid moves is disposed.

[0013] In the side of the inner case of the fuel cell humidifier equipped with the bypass-type baffle of the present invention described above, an opening may be provided continuously from one side of the inner case to the other side of the inner case.

[0014] The bypass flow path of the fuel cell humidifier equipped with the bypass-type baffle of the present invention described above includes a first bypass flow path formed between the upper inner wall of the mid-case and the upper outer side of the inner case, and a second bypass flow path formed between the lower inner wall of the mid-case and the lower outer side of the inner case, wherein the baffle is formed in a plate shape to partition the first bypass flow path and the second bypass flow path, and the moving hole of the baffle can be provided at a point where the first bypass flow path or the second bypass flow path is formed.

[0015] The baffle of the fuel cell humidifier equipped with the bypass-type baffle of the present invention described above is formed in a plate shape and has a mounting hole into which the inner case is inserted, and the moving hole may be provided at the upper or lower portion of the mounting hole.

[0016] The baffle of the fuel cell humidifier equipped with the bypass-type baffle of the present invention described above includes a first baffle having the movable hole provided only in the upper portion of the mounting hole, and a second baffle having the movable hole provided only in the lower portion of the mounting hole, and the first baffle and the second baffle can be arranged in the internal space of the mid-case.

[0017] In the internal space of the mid-case of the fuel cell humidifier equipped with the bypass-type baffle of the present invention described above, the first baffle and the second baffle can be arranged alternately.

[0018] The baffle of the fuel cell humidifier equipped with the bypass-type baffle of the present invention described above includes a first baffle in which the movable hole is provided only on the upper portion of the mounting hole, and a plurality of the first baffles are arranged in the internal space of the mid-case so that the first bypass path can be opened and the second bypass path can be closed.

[0019] The baffle of the fuel cell humidifier equipped with the bypass-type baffle of the present invention described above includes a second baffle in which the movable hole is provided only at the lower portion of the mounting hole, and a plurality of second baffles are arranged in the internal space of the mid-case, so that the second bypass path can be opened and the first bypass path can be closed.

[0020] The present invention relates to a fuel cell humidifier equipped with a bypass-type baffle, which has the advantage of reducing differential pressure by forming a permanent bypass path between the inner case of a cartridge and the inner wall of a mid-case to bypass exhaust gas.

[0021] In addition, the present invention has the advantage of increasing the effective area of ​​the humidifying film by diversifying the fluid movement path through the baffle that divides the bypass path, thereby improving the humidifying efficiency while reducing the differential pressure.

[0022] FIG. 1 is an exploded perspective view of a fuel cell humidifier equipped with a bypass-type baffle according to an embodiment of the present invention.

[0023] FIG. 2 is a drawing showing a cartridge according to an embodiment of the present invention being mounted in a mid-case.

[0024] FIG. 3 is a drawing showing a cartridge having openings on the entire side of the inner case according to an embodiment of the present invention.

[0025] FIG. 4 is a drawing showing that the movement path of exhaust gas is changed by alternately arranging the first baffle and the second baffle inside the mid-case according to an embodiment of the present invention.

[0026] FIG. 5 is a drawing showing an embodiment of the present invention in which only the first baffle is placed inside the mid-case so that the first bypass path is open and the second bypass path is closed.

[0027] FIG. 6 is a drawing showing an embodiment of the present invention in which only the second baffle is placed inside the mid-case so that the second bypass path is open and the first bypass path is closed.

[0028] This specification clarifies the scope of the present invention and explains the principles of the invention and discloses embodiments thereof to enable those skilled in the art to practice the invention. The disclosed embodiments may be implemented in various forms.

[0029] Expressions such as “includes” or “may include” that may be used in various embodiments of the present invention indicate the existence of the disclosed function, operation, or component, etc., and do not limit one or more additional functions, operations, or components, etc. In addition, in various embodiments of the present invention, it should be understood that terms such as “includes” or “has” are intended to specify the existence of a feature, number, step, operation, component, part, or combination thereof described in the specification, and do not exclude in advance the possibility of the existence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0030] When a component is referred to as being "connected, coupled" to another component, it should be understood that while the component may be directly connected or coupled to the other component, there may also be a new component between the component and the other component. Conversely, when a component is referred to as being "directly connected" or "directly coupled" to another component, it should be understood that no new component exists between the component and the other component.

[0031] The terms first, second, etc. used in this specification may be used to describe various components, but the components should not be limited by the terms. The terms are used only to distinguish one component from another.

[0032] The present invention relates to a fuel cell humidifier equipped with a bypass-type baffle, which reduces differential pressure by bypassing exhaust gas through a bypass path, and increases the effective area of ​​a humidifying membrane by diversifying the fluid movement path through the baffle. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

[0033] A fuel cell humidifier equipped with a bypass-type baffle according to an embodiment of the present invention includes a mid-case (110), a cartridge (130), a bypass path (150), and a baffle (160).

[0034] A humidifier according to an embodiment of the present invention can humidify gas to be supplied to a fuel cell stack. Referring to FIG. 1, the mid-case (110) may be an external housing of the humidifier, and a humidifying membrane (132) for humidifying air may be provided within the mid-case (110).

[0035] The above mid-case (110) may be provided with an exhaust gas inlet (111) and an exhaust gas outlet (112). The above mid-case (110) may be provided with an exhaust gas inlet (111) through which high-temperature and humid exhaust gas discharged from a fuel cell stack may be introduced, and an exhaust gas outlet (112) through which the exhaust gas may be discharged.

[0036] According to an embodiment of the present invention, an end cap (120) may be coupled to the mid-case (110). The end cap (120) is coupled to one side and the other side of the mid-case (110).

[0037] The above end cap (120) may be provided with an air inlet (121) capable of supplying dry air to the mid-case (110) and an air outlet (122) capable of discharging humidified air from the mid-case (110).

[0038] Specifically, the end cap (120) coupled to one side of the mid-case (110) may be provided with the air outlet (122), and the end cap (120) coupled to the other side of the mid-case (110) may be provided with the air inlet (121). The air outlet (122) is connected to a fuel cell stack, and humidified air discharged through the air outlet (122) may be supplied to the fuel cell stack.

[0039] High temperature and humid exhaust gas discharged from the fuel cell stack can be introduced into the mid-case (110) through the exhaust gas inlet (111) provided in the mid-case (110).

[0040] The exhaust gas flowing into the mid-case (110) supplies moisture to the dry air supplied to the mid-case (110) through the air inlet (121) of the end cap (120).

[0041] The exhaust gas that has supplied moisture to the dry air can be discharged to the outside through the exhaust gas discharge port (112) provided in the mid-case (110). The dry air humidified through the mid-case (110) is discharged through the air discharge port (122), and the humidified air is supplied to the fuel cell stack.

[0042] According to an embodiment of the present invention, the end cap (120) may be coupled to one side and the other side of the mid-case (110), but the end cap (120) may also be formed integrally with the mid-case (110).

[0043] Referring to FIGS. 2 and 3, the cartridge (130) may include an inner case (140) in which a humidifying film (132) is placed and a fixing member (131) that fixes the humidifying film (132) on one side and the other side of the inner case (140).

[0044] The above cartridge (130) may be placed inside the mid-case (110). Referring to FIG. 2, the inner case (140) may be a case having a space inside, and one or more inner cases (140) may be placed inside the mid-case (110).

[0045] The above humidifying film (132) may be placed inside the inner case (140). The above humidifying film (132) may be a humidifying film that exchanges moisture between exhaust gas and dry air, and one or more humidifying films (132) may be provided inside the inner case (140).

[0046] According to an embodiment of the present invention, the humidifying membrane (132) may be formed of a hollow fiber membrane. However, the present invention is not limited thereto, and the humidifying membrane (132) may be formed of various types of humidifying membranes as long as they can exchange moisture between exhaust gas and dry air.

[0047] The above fixing part (131) fixes the humidifying film (132) to the inner case (140) on one side of the inner case (140), and the above fixing part (131) may be formed of a potting layer.

[0048] The above-mentioned fixing member (131) can be formed on one side of a plurality of the above-mentioned humidifying films (132), and one side of the plurality of the above-mentioned humidifying films (132) can be fixed to one side of the above-mentioned inner case (140) through the above-mentioned fixing member (131).

[0049] In addition, the fixing member (131) can also fix a plurality of humidifying films (132) to the inner case (140) on the other side of the inner case (140). The fixing member (131) can also be formed on the other side of the plurality of humidifying films (132), and the other side of the plurality of humidifying films (132) can be fixed to the other side of the inner case (140) through the fixing member (131).

[0050] The above-mentioned fixed part (131) can isolate the internal space of the inner case (140), and by providing the fixed part (131) on one side and the other side of the inner case (140), dry air can move only through the inside of the humidifying film (132) or the hollow space of the humidifying film (132).

[0051] A fuel cell humidifier equipped with a bypass-type baffle according to an embodiment of the present invention may further include a packing member (133). Referring to FIG. 1, the packing member (133) is inserted between the cartridge (130) and the mid-case (110) to seal the space between the cartridge (130) and the mid-case (110).

[0052] The above packing member (133) can prevent the dry air supplied through the end cap (120) and the exhaust gas supplied to the mid-case (110) from being directly mixed.

[0053] Referring to Fig. 1, the packing member (133) is provided on one side and the other side of the cartridge (130), and can isolate the points where dry air is introduced and discharged and the points where exhaust gas is introduced and discharged.

[0054] By dividing the points where dry air is introduced and discharged and the points where exhaust gas is introduced and discharged through the above packing member (133), it is possible to prevent the dry air supplied through the end cap (120) and the exhaust gas supplied to the mid-case (110) from being directly mixed.

[0055] The above packing member (133) may be made of a rubber member, but is not limited thereto, and the packing member (133) may include various members. For example, the packing member (133) may include a soft member, a hard member, and may also include a metal member.

[0056] Referring to FIG. 3, an opening (134) (window) may be provided continuously along the side of the inner case (140) according to an embodiment of the present invention from one side of the inner case (140) to the other side of the inner case (140). The opening (134) may be a portion that is open to the outside, and exhaust gas may flow into the cartridge (130) through the opening (134).

[0057] The above opening (134) may be provided only on one side and the other side of the inner case (140). However, in such a case, as the inflow of exhaust gas is concentrated into the opening (134) provided on one side and the other side of the inner case (140), there is a problem in that the humidifying film is damaged as the flow velocity increases in the opening (134).

[0058] In order to prevent such a problem, a fuel cell humidifier equipped with a bypass-type baffle according to an embodiment of the present invention may be provided with an opening (134) (window) continuously from one side of the inner case (140) to the other side of the inner case (140). That is, the opening (134) may be provided on the entire side surface of the inner case (140).

[0059] In this way, by providing the openings (134) on the entire side of the inner case (140), it is possible to prevent the flow rate from being concentrated in a specific opening (134) and the flow rate from becoming too fast.

[0060] When the openings (134) are provided on the entire side of the inner case (140), the humidification efficiency can be improved by introducing exhaust gas into various points of the openings (134). To this end, a fuel cell humidifier equipped with a bypass-type baffle according to an embodiment of the present invention may be equipped with the bypass path (150) and the baffle (160).

[0061] Referring to FIG. 4, the bypass flow path (150) may be formed between the inner wall of the mid-case (110) and the outer side of the inner case (140). The bypass flow path (150) may be a flow path formed between the inner wall of the mid-case (110) and the outer side of the inner case (140), and exhaust gas may move from the outside of the cartridge (130) through the bypass flow path (150).

[0062] The above bypass path (150) may be a permanent bypass path formed between the inner case (140) of the cartridge (130) and the inner wall of the mid-case (110), and exhaust gas can be bypassed through the bypass path (150).

[0063] A fuel cell humidifier equipped with a bypass-type baffle according to an embodiment of the present invention can reduce differential pressure by forming the bypass path (150) to bypass exhaust gas.

[0064] According to an embodiment of the present invention, the bypass flow path (150) may include a first bypass flow path (151) formed between the upper inner wall (113) of the mid-case (110) and the outer side of the upper part (141) of the inner case (140), and a second bypass flow path (152) formed between the lower inner wall (114) of the mid-case (110) and the outer side of the lower part (142) of the inner case (140).

[0065] Here, the upper inner wall (113) of the mid-case (110) may be an inner wall provided on the upper side of the mid-case (110) based on FIG. 4, and the lower inner wall (114) of the mid-case (110) may be an inner wall provided on the lower side of the mid-case (110) based on FIG. 4.

[0066] In addition, the upper part (141) of the inner case (140) may be the upper part of the inner case (140) based on FIG. 4, and the lower part (142) of the inner case (140) may be the lower part of the inner case (140) based on FIG. 4.

[0067] The side surface (143) of the inner case (140) may be a surface formed between the upper part (141) and the lower part (142) of the inner case (140) based on FIG. 4, and the opening (134) may be provided on the entire side surface (143) of the inner case (140).

[0068] Referring to Fig. 4, the baffle (160) may be arranged in the internal space of the mid-case (110) to partition the bypass flow path (150). The baffle (160) is formed in a plate shape and can be installed inside the mid-case (110), so that the bypass flow path (150) can be partitioned through the baffle (160) formed in a plate shape.

[0069] Referring to Fig. 4, the baffle (160) may be provided with a moving hole (161) through which a fluid moves, and the fluid may move through the moving hole (161). The moving hole (161) may be a hole penetrating the baffle (160).

[0070] The above baffle (160) may include a point where the moving hole (161) is provided and a point where the moving hole (161) is not provided. The fluid can move through the point where the moving hole (161) is provided in the baffle (160), and the fluid cannot move through the point where the moving hole (161) is not provided in the baffle (160).

[0071] When dividing the bypass path (150) through the baffle (160), the fluid movement path can be diversified by changing the point at which the movement hole (161) is provided, thereby changing the path along which the fluid moves.

[0072] Specifically, by partitioning the bypass path (150) through the baffle (160) and changing the point at which the moving hole (161) is provided, the path along which the exhaust gas moves between the bypass path (150) and the opening (134) can be changed.

[0073] Referring to FIG. 4, the baffle (160) according to an embodiment of the present invention may be provided with a mounting hole (162) into which the inner case (140) is inserted. The mounting hole (162) may be a hole penetrating the baffle (160), and the inner case (140) may be inserted into the mounting hole (162).

[0074] When the baffle (160) is placed inside the mid-case (110), the baffle (160) can be placed so that the inner case (140) is inserted through the mounting hole (162) of the baffle (160).

[0075] According to an embodiment of the present invention, the moving hole (161) of the baffle (160) may be provided above or below the mounting hole (162). The moving hole (161) of the baffle (160) may be selectively provided above or below the mounting hole (162). If necessary, the moving hole (161) may be provided at both the upper and lower portions of the mounting hole (162).

[0076] Referring to FIG. 4, a plurality of baffles (160) may be arranged inside the mid-case (110), and the baffles (160) may partition the first bypass path (151) and the second bypass path (152).

[0077] The moving hole (161) of the baffle (160) may be provided at a point where the first bypass flow path (151) or the second bypass flow path (152) is formed, thereby changing the path of the fluid passing through the first bypass flow path (151) and the second bypass flow path (152).

[0078] According to an embodiment of the present invention, the baffle (160) may include a first baffle (171) in which the moving hole (161) is provided only in the upper portion of the mounting hole (162) and a second baffle (172) in which the moving hole (161) is provided only in the lower portion of the mounting hole (162).

[0079] When the first bypass flow path (151) and the second bypass flow path (152) are partitioned through the first baffle (171) in which the moving hole (161) is provided only on the upper portion of the mounting hole (162), the first bypass flow path (151) can be in a state in which fluid can move by the moving hole (161), and the second bypass flow path (152) can be in a state in which fluid cannot move.

[0080] When the first bypass flow path (151) and the second bypass flow path (152) are partitioned through the second baffle (172) in which the moving hole (161) is provided only at the lower portion of the mounting hole (162), the second bypass flow path (152) can be in a state in which fluid can move by the moving hole (161), and the first bypass flow path (151) can be in a state in which fluid cannot move.

[0081] A plurality of baffles (160) may be arranged in the internal space of the mid-case (110), and one or more first baffles (171) and one or more second baffles (172) may be arranged in the internal space of the mid-case (110). By arranging the first baffle (171) and the second baffle (172) in the internal space of the mid-case (110), the movement path of the exhaust gas can be diversified.

[0082] Referring to FIG. 4, the first baffle (171) and the second baffle (172) may be arranged alternately in the internal space of the mid-case (110) according to an embodiment of the present invention.

[0083] When the first baffle (171) and the second baffle (172) are alternately arranged inside the mid-case (110), as shown in FIG. 4, the exhaust gas introduced through the exhaust gas inlet (111) moves alternately between the upper and lower parts of the outside of the cartridge (130) through the first bypass path (151) and the second bypass path (152).

[0084] When moving alternately between the upper and lower parts of the outer side of the cartridge (130) through the first bypass passage (151) and the second bypass passage (152), exhaust gas can flow in from the entire side of the inner case (140) because the opening (134) is provided on the entire side of the inner case (140).

[0085] By introducing exhaust gas from the entire side of the inner case (140) through the first baffle (171), the second baffle (172), the first bypass passage (151), and the second bypass passage (152), the effective area of ​​the humidifying film (132) can be increased. This allows the humidifying efficiency of the fuel cell humidifier to be improved while reducing the differential pressure.

[0086] That is, a fuel cell humidifier equipped with a bypass-type baffle according to an embodiment of the present invention uses the inner case (140) having the opening (134) provided on the entire side, and changes the movement path of the exhaust gas moving through the first bypass path (151) and the second bypass path (152) through the first baffle (171) and the second baffle (172), thereby increasing the effective area of ​​the humidifying film (132), thereby improving the humidifying efficiency.

[0087] In the internal space of the mid-case (110) of the fuel cell humidifier equipped with a bypass-type baffle according to an embodiment of the present invention, a plurality of first baffles (171) may be arranged, each of which has the moving hole (161) provided only on the upper portion of the mounting hole (162).

[0088] Referring to FIG. 5, only the first baffle (171) can be arranged in multiple numbers in the internal space of the mid-case (110), thereby opening the first bypass path (151) and closing the second bypass path (152).

[0089] In addition, in the internal space of the mid-case (110) of the fuel cell humidifier equipped with a bypass-type baffle according to an embodiment of the present invention, a plurality of second baffles (172) having the moving hole (161) provided only at the lower portion of the mounting hole (162) may be arranged.

[0090] Referring to Fig. 6, only the second baffle (172) can be arranged in multiple numbers in the internal space of the mid-case (110), thereby opening the second bypass path (152) and closing the first bypass path (151).

[0091] A fuel cell humidifier equipped with a bypass-type baffle according to an embodiment of the present invention can change the movement path of the exhaust gas moving through the first bypass path (151) and the second bypass path (152) depending on the position and shape of the exhaust gas inlet (111) and the exhaust gas outlet (112) and the hydraulic pressure of the exhaust gas.

[0092] A fuel cell humidifier equipped with a bypass-type baffle according to an embodiment of the present invention can move exhaust gas only through the first bypass passage (151) formed on the upper portion of the inner case (140) by opening the first bypass passage (151) and closing the second bypass passage (152) through the first baffle (171) as shown in FIG. 5.

[0093] In addition, a fuel cell humidifier equipped with a bypass-type baffle according to an embodiment of the present invention can open the second bypass path (152) through the second baffle (172) and close the first bypass path (151), as shown in FIG. 6, so that exhaust gas can be moved only through the second bypass path (152) formed at the lower portion of the inner case (140).

[0094] A fuel cell humidifier equipped with a bypass-type baffle according to the embodiment of the present invention described above has the following effects.

[0095] A fuel cell humidifier equipped with a bypass-type baffle according to an embodiment of the present invention has the advantage of reducing differential pressure by forming a permanent bypass path between the inner case of the cartridge and the inner wall of the mid-case to bypass exhaust gas.

[0096] In addition, a fuel cell humidifier equipped with a bypass-type baffle according to an embodiment of the present invention can increase the effective area of ​​a humidifying film by diversifying the fluid movement path through the baffle that divides the bypass path, thereby having the advantage of reducing differential pressure while improving humidifying efficiency.

[0097] While the present invention has been described with reference to the embodiments illustrated in the drawings, these are merely exemplary, and those skilled in the art will appreciate that various modifications and variations of the embodiments are possible. Therefore, the true scope of technical protection of the present invention should be determined by the technical spirit of the appended claims.

Claims

1. In a humidifier for fuel cells, A mid-case having an exhaust gas inlet for receiving exhaust gas discharged from a fuel cell stack and an exhaust gas outlet for discharging the exhaust gas; A cartridge disposed inside the mid-case, comprising an inner case in which a humidifying film is disposed and a fixing member for fixing the humidifying film on one side and the other side of the inner case; A bypass path formed between the inner wall of the mid-case and the outer side of the inner case; A baffle is disposed in the internal space of the mid-case and divides the bypass path; A fuel cell humidifier equipped with a bypass-type baffle, characterized in that the baffle is provided with a moving hole through which a fluid moves.

2. In paragraph 1, A fuel cell humidifier equipped with a bypass-type baffle, characterized in that an opening is continuously provided on the side of the inner case from one side of the inner case to the other side of the inner case.

3. In paragraph 1, The above bypass euro is, It includes a first bypass flow path formed between the upper inner wall of the mid-case and the upper outer side of the inner case, and a second bypass flow path formed between the lower inner wall of the mid-case and the lower outer side of the inner case. The above baffle is formed in a plate shape and divides the first bypass flow path and the second bypass flow path, A fuel cell humidifier equipped with a bypass-type baffle, characterized in that the moving hole of the baffle is provided at a point where the first bypass path or the second bypass path is formed.

4. In paragraph 3, The above baffle is formed in a plate shape and has a mounting hole into which the inner case is inserted. A fuel cell humidifier equipped with a bypass-type baffle, characterized in that the moving hole is provided at the upper or lower portion of the above-mentioned mounting hole.

5. In paragraph 4, The above baffle includes a first baffle in which the moving hole is provided only at the upper portion of the mounting hole, and a second baffle in which the moving hole is provided only at the lower portion of the mounting hole. A fuel cell humidifier equipped with a bypass-type baffle, characterized in that the first baffle and the second baffle are arranged in the internal space of the mid-case.

6. In paragraph 5, A fuel cell humidifier equipped with a bypass-type baffle, characterized in that the first baffle and the second baffle are arranged alternately in the internal space of the mid-case.

7. In paragraph 4, The above baffle includes a first baffle in which the moving hole is provided only on the upper portion of the above mounting hole, A fuel cell humidifier equipped with a bypass-type baffle, characterized in that a plurality of first baffles are arranged in the internal space of the mid-case, and the first bypass path is opened and the second bypass path is closed.

8. In paragraph 4, The above baffle includes a second baffle in which the moving hole is provided only at the lower portion of the above mounting hole, A fuel cell humidifier equipped with a bypass-type baffle, characterized in that a plurality of second baffles are arranged in the internal space of the mid-case, and the second bypass path is opened and the first bypass path is closed.

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