Air shut-off valve module

Abstract

Air shut-off valve module of a system of a fuel cell vehicle with a fuel cell stack, characterized in that the air shut-off valve module comprises the following parts: a lower housing (10) having an air inlet (11) and an air outlet (12) formed separately from each other and attached to a stack so as to correspond to an air inlet and an air outlet of the stack; a main housing (20) connected to the sub-housing (10) and having an inlet pipe side space (21a) communicating with the air inlet (11) and an outlet pipe side space (22a) communicating with the air outlet (12) of the sub-housing (10), wherein an air inlet pipe (21) and an air outlet pipe (22) are formed, which in turn are connected through the respective spaces; a housing cover (40) attached to the main housing (20) and formed with a bypass flow channel (41) connected to the space (21a, 22a) of the air inlet pipe side and the air outlet pipe side, respectively; and Valve plates (71, 72) each installed in the space (21a, 22a) of the air inlet pipe side and the air outlet pipe side of the main casing (20) for opening and closing inlets (11) and outlets (12) of the sub-casing (10) and the bypass flow channel (41), that the inlet (11) and the outlet (12) of the lower housing (10) are blocked by the valve plates (71, 72) when the stack stops, and that the valve plates (71, 72) are open in an intermediate state when starting the stack, and all inlets (11) and outlets (12) of the lower housing (10) and the bypass flow channel (41) are open.

Description

[Technical field of the invention]

[0001] The present invention relates to an air shutoff valve module, specifically an air shutoff valve module for opening and closing air inlet piping and air outlet piping of a stack in a fuel cell vehicle, and a control method thereof. [Technical background of the invention]

[0002] A fuel cell vehicle is a vehicle whose engine is powered by electrical energy generated by a fuel cell stack.

[0003] In the stack, hydrogen reacts with oxygen in the air to generate electricity, producing water (steam) and heat.

[0004] As in Fig. 1, an air inlet duct 2 and an air outlet duct 3 are connected to the stack 1. A blower 4 is installed on the air inlet duct 2 to uniformly supply the outside air to the stack 1. As the supply air flows in through a humidifier 5, it is humidified so that the electrolytic membranes within the stack 1 can be sufficiently moistened, whereby the hydrogen ion movement from the anode to the cathode actively takes place, thereby accelerating the electrochemical reaction of the stack.

[0005] In the stack 1, air not used for the reaction is vented to the atmosphere through the air outlet pipe 3, which also passes the humidifier 5.

[0006] At the same time, the air shut-off valves 6 and 7 are installed on the air inlet pipe 2 and the air outlet pipe 3, respectively.

[0007] The air shut-off valves 6 and 7 serve to prevent the durability of the stack from being impaired by the outside air being distributed through the air inlet pipe 2 and the air outlet pipe 3 inside the stack 1 (air electrode) when the stack 1 is actuated.

[0008] As described above, since the air shutoff valves 6 and 7 are conventionally mounted on the air inlet piping 2 and the air outlet piping 3, respectively, and the air shutoff valves 6 and 7 are also provided with the driving devices, the size of the part related to the air shutoff valves 6 and 7 is increased and the structure thereof is complicated.

[0009] This has resulted in a problem that even if the air shutoff valves 6 and 7 are far away from the stack 1 and are closed during the actuation adjustment of a stack, the air between the stack 1 and the air shutoff valves 6 and 7 is admitted into the stack 1, causing an unnecessary reaction.

[0010] In the prior art, there was also the problem that, since the air in stack 1, which contains hydrogen, is simply discharged through the air outlet piping 3 when the air shutoff valves 6 and 7 are opened during stack 1 startup, the hydrogen concentration in the exhaust gas was higher than the regulated level. (To prevent fire, the hydrogen concentration in the exhaust gas is usually regulated to less than 4%.)

[0011] (Patent document 1) Publication KR 10-1134646 B1 (02.04.2012)

[0012] US 2016 / 0141661 A1 describes an integrated valve mounted on an air inlet and an air outlet formed integrally with a fuel cell stack. The amount of air introduced into and discharged from the stack can thereby be adjusted. The valve has an inlet channel, an outlet channel, and a bypass channel. A valve plate is provided in each of the inlet channel and the outlet channel. In one state, the inlet channel and outlet channel are fully open, in another state, they are partially open, and in another state, they are fully closed. [Content of the invention][Object of the invention]

[0013] Accordingly, the present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an air shutoff valve module in which a part related to an air shutoff valve of a stack is constructed compactly, and which is capable of, on the one hand, not impairing the durability of a stack by causing unnecessary reaction of the air between the stack and the air shutoff valve during an actuation adjustment of a stack, and, on the other hand, reducing a concentration of hydrogen gas by discharging the hydrogen gas through an air discharge piping at the time of starting up of a stack.

[0014] Furthermore, a control method for the air shutoff valve module is described, which can reduce the concentration of hydrogen gas using the air shutoff valve module by expelling the hydrogen gas through the air outlet piping when starting a stack. [Technical solution]

[0015] The invention provides an air shut-off valve module according to claim 1. Further developments of the invention are set out in the dependent claims.

[0016] To achieve the above-mentioned purpose, an air cut valve module as a system of a fuel cell vehicle according to the present invention is equipped with a fuel cell stack, and is characterized in that the air cut valve module comprises the following parts: a sub-case in which an air inlet and an air outlet are formed separately from each other and attached to a stack so as to correspond to an air inlet and an air outlet of the stack; a main case connected to the sub-case and having an inlet pipe side space communicating with the air inlet and an outlet pipe side space communicating with the air outlet of the sub-case, wherein an air inlet piping and an air outlet piping are formed, which in turn are connected through the respective spaces;a casing cover attached to the main casing and formed with a bypass flow channel connected to the space of the air inlet pipe side and the air outlet pipe side, respectively, and the valve plates installed in the space of the air inlet pipe side and the air outlet pipe side, respectively, to open and close the inlet and outlet of the bypass flow channel, and (also characterized in that) the inlet and outlet of the main casing are blocked by the valve plates during an actuation setting of the stack, and that the valve plates are opened in an intermediate state when the stack is started, with all the inlets and outlets of the main casing and the bypass flow channel open.; [Effects of the invention]

[0017] According to the present invention, as described above, the shut-off valves of the air inlet piping and the air outlet piping, and drive mechanisms including the motors for driving their shut-off valves, and a controller are formed in one module.

[0018] As a result, one effect is that the construction of the part related to the air shut-off valve of the stack becomes compact.

[0019] In addition, since the base body of the module is mounted directly on the stack, the distance between the air shut-off valve and the stack is very short, thus reducing the deterioration of the durability of the stack caused by the air between the air shut-off valve and the stack during the actuation adjustment of the stack.

[0020] Furthermore, since the module is equipped with a bypass flow channel near a position adjacent to the air shutoff valve, which is connected to the air inlet channel and the air outlet channel, there is an effect that the concentration of hydrogen gas can be reduced by bypassing the air supplied from the outside when starting a stack, thus diluting the hydrogen gas which is subsequently discharged through the air outlet piping. [Brief descriptions of the invention]

[0021] They show: Fig. 1: a schematic view illustrating a construction of an air inlet duct and air outlet duct of a stack according to the prior art; Fig. 2: a perspective view of an air shut-off valve module according to the present invention; Fig. 3: a longitudinal sectional view of Fig. 2, the view illustrating the internal structure of the air shut-off valve module according to the present invention. Fig. 4 to 6: the sectional views on the line I - I of the Fig. 2, where Fig. 4 is a drawing showing a state in which an air shut-off valve shuts off an air inlet and an air outlet of a sub-case, and Fig. 5 is a drawing showing a state in which an air shut-off valve shuts off a bypass flow passage of the main body, and Fig. 6 is a drawing showing a state in which an air shutoff valve opens both an air inlet and an air outlet of a sub-case and a bypass flow passage of the case cover; and Fig. 7: A block diagram showing a construction of a control method of an air shut-off valve module according to the present invention. [Embodiments of the invention]

[0022] The specific embodiments of the present invention will be described in more detail with reference to the accompanying drawings. Since various modifications and equivalent other embodiments can be made in the present invention, it should be understood, however, that the invention is not limited to the specific embodiments, but includes all modifications, equivalents, and alternatives that fall within the spirit and technical scope of the invention. Incidentally, the thickness of the lines and the sizes of the components shown in the accompanying drawings may be exaggerated for clarity and convenience of explanation.

[0023] Furthermore, terms described below, which are defined in consideration of the functions of the present invention, may vary depending on the user, operator intent, or precedent. Therefore, the definitions of these terms should be referenced based on the contents of the entire patent specification.

[0024] Hereinafter, the preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

[0025] As in the Fig. 2 to 4, an air shutoff valve module according to the present invention comprises the following parts: a sub-housing 10, a main housing 20, a controller 30, a housing cover 40, a shaft 50, a motor 60, and valve plates 71 and 72.

[0026] The sub-housing 10 is a part for directly attaching the air shut-off valve module to the stack, and is formed with an air inlet duct and an air outlet duct separated from each other with the main housing 20.

[0027] A plurality of flanges 10a are formed on the outer periphery of a sub-housing 10 for attachment to a stack. Bolt holes are formed for bolt mounting on the flanges 10a.

[0028] Within the sub-housing 10, an inlet 11 and an outlet 12 are formed, separated from each other by a partition wall. When the sub-housing 10 is attached to the stack, the inlet 11 and the outlet 12 are each connected to an inlet and an outlet of the stack's cathode.

[0029] A main body 20 is formed with an inlet pipe 21 connected to an air intake duct and an outlet pipe 22 connected to an air outlet duct. The interior spaces 21a and 22a of the main body 20 are connected to the inlet pipe 21 and the outlet pipe 22 and separated from each other by a partition wall. That is, an inlet pipe side space 21a connected to the inlet pipe 21 and an outlet pipe side space 22a connected to the outlet pipe 22 are separated from each other.

[0030] The spaces of the two sides 21a and 22a are open on the back of the main housing 20 (on one side on which the sub-housing 10 is mounted), and on the edge of the respective open side there is an attachment part of the sub-housing 25 (see Fig. 4) protruding.

[0031] The attachment part 25 of the lower case is formed in a shape into which the inlet 11 and the outlet 12 of the lower case 10 can be inserted, respectively. That is, an attachment part 25 to which the inlet 11 of the lower case 10 is connected and an attachment part 25 to which the outlet 12 is connected are formed separately.

[0032] The inlet 11 and the outlet 12 of the sub-housing 10 are inserted into the attachment part 25 and their end parts are exposed to the spaces 21a and 22a of the main housing 20.

[0033] According to the above-described construction, an air intake duct is formed sequentially within the module, following the intake pipe 21, the space 21a, and the intake 11, and an air exhaust duct is formed sequentially within the module, following the intake duct 12, the space 22a, and the exhaust pipe 22. As described above, the air intake duct and the exhaust duct are separated from each other.

[0034] A shaft 50 is mounted in the main housing 20, traversing one side portion of the spaces 21a and 22a (the opposite side portion of the adjacent end portion in the inlet pipe 21 and the outlet pipe 22). A shaft hole 23, through which the shaft 50 passes, is formed on the boundary wall of two spaces of both sides 21a and 22a.

[0035] The end portions of both sides of the shaft 50 are supported on bearings installed in the main housing 20.

[0036] A valve plate 71 for blocking the air inlet channel and a valve plate 72 for blocking the air outlet channel are mounted on the shaft 50 by means of screws. In the spaces 21a and 22a, the valve plates 71 and 72 are rotated together at the same angle by the rotation of the shaft 50.

[0037] A sealing element 73 made of a plastic material may be attached to the surfaces of the valve plates 71 and 72 to improve the tightness of the valve plates 71 and 72 (see Fig. 4).

[0038] On a side portion of the main body 20 (at the opposite portion to the position where the intake pipe 21 and the exhaust pipe 22 are formed), a motor 24 is inserted, and a motor 60 is insertedly installed on the motor 24. Optionally, a gear set 61 for reducing the output speed of the motor 60 and increasing the torque may be installed internally. The gear set 61 may be a planetary gear set.

[0039] A pinion gear 62 is installed on the output shaft of the motor 60 (or gear set 61), and a segment gear 51 is installed on one side end of the shaft 50, with the pinion gear 62 and the segment gear 51 meshing with each other. Accordingly, the rotational force of the motor 60 is transmitted to the shaft 50, and the shaft 50 is rotated in either direction depending on the driving direction of the motor 60.

[0040] The control unit 30 is installed on another side of the main body 20. The control unit 30 controls the drive of the motor 60, communicating with a fuel cell control unit (FCU) and controlling the motor 60 according to the ON / OFF state of the stack, so that the valve plates 71 and 72 are actuated to open and close the air intake and exhaust passages. A control circuit board 31 enabling such electronic control is constructed within the control unit 30.

[0041] The front side of the main housing 20 (the opposite side of a side on which the sub-housing 10 is mounted) is open to mount the valve plates 71 and 72 on the shaft 50, and to cover this open side is provided with the housing cover 40.

[0042] A U-shaped bypass flow channel 41 is formed inside the housing cover 40. The bypass flow channel 41 is connected from the inside of the main housing 20 to the space 21a on the inlet pipe 21 side and the space 22a on the outlet pipe 22 side.

[0043] The operation of the air shut-off valve module according to the present invention is described below.

[0044] Since the motor 60 is rotated in the forward and reverse directions by the controller 30, the valve plates 71 and 72 are rotated together with the shaft 50 to open and close the air inlet passage and the air outlet passage and the bypass flow passage 41.

[0045] As in Fig. 4, the valve plates 71 and 72 are rotated together with the shaft 50 while the motor 60 is actuated (Since Fig. 4 a sectional view on the line I - I in Fig. 2, only the valve plate 71 on the air inlet duct side is shown, but the valve plate 72 on the opposite side of the air outlet duct is also operated in the same state).

[0046] When the valve plates 71 and 72 are rotated toward the lower casing 10, the valve plates 71 and 72 tightly adhere to the end portions of the inlet 11 and the outlet 12 of the lower casing 10, and then they block the inlet 11 and the outlet 12, and then they block the air inlet passage and the air outlet passage.

[0047] As in Fig. 5, when the valve plates 71 and 72 are rotated toward the housing cover 40, the valve plates 71 and 72 close the inlet 41a and the outlet of the bypass flow passage 41 (it is obvious that there is an outlet on the opposite side connected to the space 22a on the side of the outlet pipe 22 of the main body 20), and thus they block the bypass flow passage 41 for the air inlet passage and the air outlet passage.

[0048] As in Fig. As shown in Fig. 6, since the actuation amount of the motor 60 is controlled by the controller 30, it is possible to freely adjust the opening degree of the valve plates 71 and 72 in the range from the blocking positions of the inlet 11 and outlet 12 of the lower casing 10 to the inlet 41a and outlet of the bypass flow passage 41. According to the adjustment of the opening degree of the valve plates 71 and 72, the flow amount and discharge amount of the stack, as well as the bypass flow amount, can be adjusted as needed.

[0049] As described above, in an air shutoff valve module according to the present invention, an air inlet duct and an air outlet duct are formed approximately to each other, wherein the valve plates 71 and 72, which respectively open and close the air inlet duct and the air outlet duct, are actuated by a motor 50 and a shaft 60. That is, the valve plates 71 and 72 of the air inlet duct and the air outlet duct are actuated by the same drive mechanism. The shaft 50 and the motor 60 are housed in the module-based main body 20, on the side of which the controller 30, which controls the actuation of the motor 60, is also mounted.

[0050] As a result, a structure related to an air shutoff valve can be designed as a highly compact module, with the air shutoff valve blocking an air inlet piping and an air outlet piping of the stack. Therefore, the layout of the stack periphery of the fuel cell vehicle can be designed even more compactly, and the resulting free space can be used for the arrangement of other devices.

[0051] In addition, the air shut-off valve module is designed such that, since the lower housing 10 is directly connected to the air inlet and air outlet of the stack, a piping from the position shut off by the valve plates 71 and 72 to the stack is very short when the air inlet channel and the air outlet channel are in a state of Fig. 4 are cordoned off.

[0052] Since the amount of air supplied inside the piping and then dispersed into the air electrode (cathode) of the stack is almost nonexistent, it can be prevented from affecting the durability of the stack by causing unnecessary reaction during an actuation adjustment of a stack.

[0053] In addition, in order to enable the bypass of the supplied air through the bypass flow channel 41, the air shut-off valve module is in a state in which the valve plates 71 and 72 shut off the inlet 11 and the outlet 12 of the lower housing 10 during an actuation setting of the stack, and upon starting the drive of a stack, the module sets the valve plates 71 and 72 to be in a predetermined angle open state as in Fig. 6 should be located.

[0054] In this case, the valve plate 72 opens the outlet 12 of the lower casing 10, and then the hydrogen remaining in the stack is discharged through the outlet 12 into the space 22a on the outlet pipe 22 side, and then the hydrogen gas is mixed with the outside air (the air not passed the stack) which is bypassed from the space 21a on the inlet pipe 21 side into the space 22a through the bypass flow passage 41, so that the hydrogen concentration of the exhaust gas discharged through the air outlet piping can be reduced.

[0055] A control method of the air shutoff valve module for reducing the hydrogen concentration of the exhaust gas is described in more detail below.

[0056] As in Fig. 7, a control method of the air shutoff valve module according to the present invention includes a shutoff stage of the air inlet and air outlet S10, a middle opening stage of the valve S20, and a shutoff stage of the bypass flow channel S30.

[0057] An execution of a shut-off stage of the air inlet and air outlet S10 takes place in an actuation setting of the stack, wherein the control unit 30 first receives the information about the actuation setting of the stack from the fuel cell control unit (FCU) and then actuates the motor 60 so that it opens the valve plates 71 and 72, as in Fig.4, is set in rotational motion relative to the lower housing 10 to shut off the inlet 11 and the outlet 12 of the lower housing 10. In this state, the actual purpose of the air shutoff valve is to be achieved, whereby the valve prevents air from being admitted into the stack from the outside during the actuation adjustment of the stack, thus causing unnecessary reaction in the stack.

[0058] Next, when the stack is started, a mid-stage valve opening operation S20 is performed, in which the valve plates 71 and 72 are opened at a predetermined angle. In this state, since the blower installed on the air intake piping is already operating, outside air flows in through the intake pipe 21 and is supplied into the stack through the inlet 11 of the opened lower casing 10. The air containing the hydrogen in the stack is discharged through the outlet 12 of the lower casing 10 into the space 22a adjacent to the outlet pipe 22 of the main casing 20. In addition, since the bypass flow passage 41 is opened by the middle opening stage of the valve plates 71 and 72, the air in the space 21a on the inlet pipe 21 side of the main body 20 is bypassed through the bypass flow passage 41 and then directly discharged into the space 22a on the outlet pipe 22 side.

[0059] As a result, the concentration of hydrogen in the exhaust gas is reduced by mixing the air with the hydrogen discharged through the outlet 12 of the lower casing 10 and the bypassed air.

[0060] In this way, when the stack is started, the valve plates 71 and 72 are controlled by the intermediate opening state to ensure the bypass flow rate, and the hydrogen concentration of the exhaust gas can be reduced by diluting the air discharged from the stack. (Accordingly) In addition, since the opening degrees of the valve plates 71 and 72 are appropriately controlled to regulate the bypass flow rate, the hydrogen concentration of the exhaust gas at engine start-up can be reduced to less than the regulation level (usually 4%).

[0061] Consequently, in the middle opening stage of the valve S20, air is supplied into the stack through the inlet 11 of the opened lower housing 10, and this air is also diluted with air within the stack, thus reducing the hydrogen concentration.

[0062] When the stack startup process is completed, a bypass flow channel shutoff stage S30 is performed. In the bypass flow channel shutoff stage S30, the controller 30 controls the motor 50, fully rotating the valve plates 71 and 72 toward the housing cover 40, thereby shutting off the inlet 41a and outlet of the bypass flow channel 41.

[0063] In a normal driving state of the stack, not only is the hydrogen discharged through the air exhaust port reduced, but a large amount of air (oxygen) is also required for the reaction within the stack. Accordingly, a bypass flow channel shutoff step S30 is performed, so that the bypass flow channel 41 is shut off. Since the inlet 11 and outlet 12 of the lower casing 10 are fully opened, all the air flowing in from the outside can be supplied into the stack, and the air discharged from the stack can also be smoothly discharged.

[0064] Furthermore, the hydrogen purification device provided in the fuel cell system can be actuated before the intermediate opening stage of the valve (S20), so that hydrogen purification of the stack can be performed first. When hydrogen purification is performed, hydrogen within the stack is eliminated, thus further reducing the hydrogen content in the air discharged through the outlet on the air electrode side to even a minute amount, and hydrogen purification can help reduce the hydrogen concentration of the exhaust gas.

[0065] As detailed above, although the present invention will be described with reference to the embodiments shown in the drawings, these embodiments are merely examples, and it is understood that various modifications or equivalent alternative embodiments are possible by those of ordinary skill in the art. Accordingly, the true scope of the present invention should be determined by the appended claims. [List of reference symbols] 10 lower housing 11 Entrance 12 Outlet 20 main housing 21 Inlet pipe 22 Outlet pipe 21a Space on the side of the inlet pipe 22a Space on the side of the outlet pipe 23 shaft hole 24 Insert part of the motor 30 Control unit 31 Control circuit board 40 Housing cover 41 Bypass flow channel 50 wave 51 Segment gear 60 engine 61 gear set 62 pinions 71, 72 valve plate 73 Sealing element

Claims

[1] Air shut-off valve module of a fuel cell vehicle system with a fuel cell stack, characterized by that the air shut-off valve module includes the following parts: a sub-housing (10) having an air inlet (11) and an air outlet (12) formed separately from each other and attached to a stack so as to correspond to an air inlet and an air outlet of the stack; a main housing (20) connected to the sub-housing (10) and having an inlet pipe side space (21a) communicating with the air inlet (11) and an outlet pipe side space (22a) communicating with the air outlet (12) of the sub-housing (10), wherein an air inlet pipe (21) and an air outlet pipe (22) are formed, which in turn are connected through the respective spaces; a housing cover (40) attached to the main housing (20) and formed with a bypass flow channel (41) connected to the space (21a, 22a) of the air inlet pipe side and the air outlet pipe side, respectively; and Valve plates (71, 72) each installed in the space (21a, 22a) of the air inlet pipe side and the air outlet pipe side of the main casing (20) for opening and closing inlets (11) and outlets (12) of the sub-casing (10) and the bypass flow channel (41), that the inlet (11) and the outlet (12) of the lower housing (10) are blocked by the valve plates (71, 72) when the stack stops, and that the valve plates (71, 72) are open in an intermediate state when starting the stack, and all inlets (11) and outlets (12) of the lower housing (10) and the bypass flow channel (41) are open. [2] Air shut-off valve module of a fuel cell vehicle system according to claim 1, characterized by that the two spaces (21a, 22a) of the air inlet pipe side and the air outlet pipe side are open on the back of the main body (20), and an attachment part of the sub-case (10) is formed protrudingly at the edge of the respective opening, and that the inlet (11) and the outlet (12) of the sub-case (10) are inserted into the attachment part, the respective end parts of which are exposed to the spaces (21a, 22a) of the air inlet pipe side and the air outlet pipe side. [3] Air shut-off valve module of a fuel cell vehicle system according to claim 1, characterized by that the module further comprises a shaft (50) installed through the two spaces (21a, 22a) of the air inlet pipe side and the air outlet pipe side of the main body (20), and that the valve plates (71, 72) are attached to the shaft (50). [4] Air shut-off valve module of a fuel cell vehicle system according to claim 3, characterized by that a motor insertion part (24) is formed on one side of the main housing (20), wherein a motor (60) which actuates the valve plates (71, 72) is installed in a push-fit manner on the motor insertion part (24) by means of the shaft (50). [5] Air shut-off valve module of a fuel cell vehicle system according to claim 4, characterized by that a pinion (62) is installed on the output shaft of the motor (60), and a segment gear (51) meshed with the pinion (62) is installed on one side end of the shaft (50). [6] Air shut-off valve module of a fuel cell vehicle system according to claim 4, characterized bythat a gear set (61) for reducing the output speed of the motor (60) and increasing the torque is connected to the output shaft of the motor (60), and that a pinion (62) is installed on the output shaft of the motor (60), and a segment gear (51) which is meshed with the pinion (62) is installed on one side end of the shaft (50). [7] Air shut-off valve module of a fuel cell vehicle system according to claim 6, characterized by that the gear set (61) is a planetary gear set. [8] Air shut-off valve module of a fuel cell vehicle system according to claim 4, characterized by that a control unit (30) is installed on one side of the main housing (20), wherein it communicates with a fuel cell control unit of the system of the fuel cell vehicle and controls an actuation of the motor (60). [9] Air shut-off valve module of a fuel cell vehicle system according to claim 1, characterized bythat a sealing element (73) is attached to the valve plates (71, 72). [10] Air shut-off valve module of a fuel cell vehicle system according to claim 8, characterized by that the control unit is configured to actuate the motor after completion of the stack start-up process to rotate the valve plates (71, 72) towards the housing cover (40) so that the valve plates block the inlet and outlet of the bypass flow channel, and all the air flowing in from the outside is fed into the stack through the inlet (11) of the lower housing (10).

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