JP2007087760A - Vehicle-mounted fuel cell system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable simplified management of piping and shorten a piping length in a superb way and easily perform curtailment of pressure loss and saving of piping weight. <P>SOLUTION: The fuel cell system 10 is provided with a fuel cell stack loaded on a fuel cell vehicle 12, a cooling medium supply mechanism 16, and a fuel gas supply mechanism 20. The cooling medium supply mechanism 16 is provided with a cooling medium supply piping 28 and a cooling medium exhaust piping 30 further toward a front side in a forward direction than the fuel cell stack 14, and on the other hand, the fuel gas supply mechanism 20 is provided with a fuel gas supply piping 45 further backward in the forward direction than the fuel cell stack 14. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an in-vehicle fuel cell system including a plurality of power generation cells and a fuel cell stack mounted on a fuel cell vehicle.

  For example, in a polymer electrolyte fuel cell, an electrolyte membrane / electrode structure (electrolyte / electrode structure) in which an anode side electrode and a cathode side electrode are disposed on both sides of an electrolyte membrane (electrolyte) made of a polymer ion exchange membrane, respectively. ) Is held by a separator. This type of fuel cell is normally used as a fuel cell stack by stacking a predetermined number of power generation cells.

  In general, this type of fuel cell stack is often mounted on a vehicle such as an automobile to constitute a fuel cell vehicle (vehicle equipped with a fuel cell). In this fuel cell vehicle, various devices have been made in order to mount a fuel cell stack and a cooling medium supply mechanism and a reaction gas supply mechanism connected to the fuel cell stack.

  For example, in the fuel cell stack vehicle mounting structure disclosed in Patent Document 1, the fuel cell stack 1 is mounted on the vehicle 2 as shown in FIG. The end plate 3 disposed on the vehicle front side of the fuel cell stack 1 is supplied with a refrigerant pipe 4 for supplying and discharging a cooling medium into the fuel cell stack 1 and a reaction gas is supplied into the fuel cell stack 1. And a gas pipe 5 for discharging.

  The gas pipe 5 includes a fuel gas pipe 5 a for supplying and discharging the fuel gas to and from the fuel cell stack 1 and an oxidizing gas pipe 5 b for supplying and discharging the oxidizing gas to and from the fuel cell stack 1. Yes.

  The refrigerant pipe 4, the fuel gas pipe 5a, and the oxidizing gas pipe 5b are disposed so as to be positioned on the vehicle front side with respect to the fuel cell stack 1, and the refrigerant pipe 4, the fuel gas pipe 5a, and the oxidizing gas pipe are arranged. 5b is connected to the compressor 6, respectively. A radiator fan 7 is disposed in front of the vehicle in order to supply cooling air to the refrigerant exhaust pipe 4, the fuel gas pipe 5 a, and the oxidizing gas pipe 5 b that are heated by the compressor 6.

Japanese Patent Laying-Open No. 2003-63257 (FIG. 4)

  By the way, in the above prior art, the refrigerant pipe 4, the fuel gas pipe 5a, and the oxidizing gas pipe 5b are connected to one end plate 3 of the fuel cell stack 1, and the refrigerant pipe 4, the fuel gas pipe 5a, and The oxidizing gas pipes 5b are all disposed on the vehicle front side. For this reason, there is a problem that piping is considerably complicated and the space for piping is enlarged.

  In addition to the various auxiliary machines, for example, a humidifier for humidifying the reaction gas is arranged on the vehicle front side. As a result, it has been pointed out that the piping becomes more complicated, and the length of the piping is considerably increased, causing the occurrence of pressure loss and the increase in the weight of the piping.

  The present invention solves this type of problem and simplifies the handling of piping, and can shorten the length of piping well, and can easily reduce pressure loss and reduce the weight of piping. An object is to provide an in-vehicle fuel cell system.

  The present invention includes a plurality of power generation cells stacked, a fuel cell stack mounted on a fuel cell vehicle, a cooling medium supply mechanism for supplying a cooling medium to the fuel cell stack, and a reaction gas to the fuel cell stack. And a reaction gas supply mechanism for supplying the reaction gas.

  The cooling medium supply mechanism arranges the cooling medium pipe on the front side in the traveling direction of the fuel cell vehicle with respect to the fuel cell stack, while the reactive gas supply mechanism reacts on the rear side in the traveling direction of the fuel cell vehicle with respect to the fuel cell stack. Gas piping is arranged.

  The fuel cell stack is preferably located on the center side in the vehicle width direction of the fuel cell vehicle, and the power generation cells are stacked in the vehicle length direction.

  Furthermore, the power generation cell preferably includes an electrolyte / electrode structure in which a pair of electrodes are provided on both sides of the electrolyte, and a separator, and is configured in a vertically long shape that is long in the vertical direction.

  Furthermore, the reaction gas supply mechanism includes a fuel gas supply mechanism for supplying fuel gas, and the fuel gas supply mechanism is disposed on the rear side in the traveling direction of the fuel cell vehicle with respect to the fuel cell stack, and It is preferable to provide a fuel gas pipe, which is a reaction gas pipe connecting the fuel cell stack and the fuel tank.

  In addition, a hollow fiber type humidifier is connected to the fuel cell stack at a position behind the fuel cell vehicle in the traveling direction of the fuel cell vehicle. It is preferable to be installed extending in the direction.

  According to the present invention, the cooling medium supply mechanism disposes the cooling medium pipe on the front side in the traveling direction of the fuel cell vehicle with respect to the fuel cell stack. For example, a radiator (heat exchanger) disposed in front of the fuel cell vehicle. Thus, the cooling medium can be supplied to and discharged from the fuel cell stack with a short pipe length. Thereby, the pressure loss in the pipe can be effectively reduced, and the weight of the pipe can be reduced well.

  In addition, since the reaction gas supply mechanism is provided with the reaction gas piping behind the fuel cell stack in the traveling direction of the fuel cell vehicle, for example, the fuel cell can be configured with a short pipe length from a fuel tank disposed behind the fuel cell vehicle. Fuel gas can be supplied to the stack. Therefore, efficient supply of fuel gas can be performed. Furthermore, the cooling medium piping and the reaction gas piping are distributed before and after the fuel cell stack, and the piping is simplified. For this reason, reduction of pressure loss and weight reduction of a piping are achieved easily.

  FIG. 1 is a schematic side view of a fuel cell vehicle 12 on which an in-vehicle fuel cell system 10 according to an embodiment of the present invention is mounted, and FIG. 2 is the fuel cell vehicle mainly composed of the fuel cell system 10. FIG. 3 is a schematic plan view of the fuel cell system 10.

  In FIG. 3, for the sake of explanation, the arrangement positions of the constituent elements described later are shown at positions different from the actual arrangement positions. The actual arrangement position is shown in FIGS.

  The fuel cell system 10 includes a fuel cell stack 14, a cooling medium supply mechanism 16 for supplying a cooling medium to the fuel cell stack 14, and an oxidant gas (reactive gas) for supplying the fuel cell stack 14. An oxidant gas supply mechanism (reactive gas supply mechanism) 18 and a fuel gas supply mechanism (reactive gas supply mechanism) 20 for supplying fuel gas (reactive gas) to the fuel cell stack 14 are provided.

  The fuel cell stack 14 is located in the center of the fuel cell vehicle 12 in the vehicle width direction (arrow W direction in FIG. 2), and the stacking direction to be described later is set in the vehicle length direction (arrow L direction). Located on the center console 22.

  As shown in FIGS. 1 to 3, the cooling medium supply mechanism 16 includes a radiator 24 disposed on the front side in the traveling direction of the fuel cell vehicle 12 (in the direction of the arrow L <b> 1). A cooling medium supply pipe 28 and a cooling medium discharge pipe 30 are connected to the radiator 24 via a refrigerant pump 26. The cooling medium supply pipe 28 and the cooling medium discharge pipe 30 are arranged on the front side in the traveling direction of the fuel cell vehicle 12 with respect to the fuel cell stack 14.

  The oxidant gas supply mechanism 18 includes an air pump 32 disposed close to the refrigerant pump 26. An air supply pipe 34 having one end connected to the air pump 32 is connected to the humidifier 36, and the fuel cell stack 14 is connected to the humidifier 36 via a humidified air supply pipe 38. Is done. The fuel cell stack 14 and the humidifier 36 are connected to an off-gas supply pipe 40 for supplying a used oxidant gas (hereinafter referred to as off-gas) as a humidified fluid. In the humidifier 36, a back pressure valve 42 is disposed on the discharge side of the off gas supplied through the off gas supply pipe 40 (see FIG. 3).

  The fuel gas supply mechanism 20 includes a fuel gas tank (fuel tank) 44 in which hydrogen gas is stored as fuel gas. One end of a fuel gas supply pipe 45 is connected to the fuel gas tank 44, and the other end of the fuel gas supply pipe 45 is connected to the fuel cell stack 14 via a shut-off valve 46, a regulator 48 and an ejector 50.

  An exhaust fuel gas pipe 52 through which used fuel gas is discharged is connected to the fuel cell stack 14. The exhaust fuel gas pipe 52 is connected to the ejector 50 via a return pipe 54 and partly communicates with the purge valve 56.

  As shown in FIG. 4, the fuel cell stack 14 has a plurality of power generation cells 60 stacked in the horizontal direction (arrow A direction), which is the vehicle length direction, and terminal plates (not shown) at both ends in the stacking direction. Further, metal end plates 62a and 62b are disposed through the insulating plate. The fuel cell stack 14 includes a casing 64 that includes end plates 62a and 62b configured as squares that are long (vertically long) in the vertical direction (arrow C direction).

  As shown in FIG. 5, each power generation cell 60 includes an electrolyte membrane / electrode structure (electrolyte / electrode structure) 66 and first and second metal having a thin plate wave shape that sandwiches the electrolyte membrane / electrode structure 66. The separators 68 and 70 are provided and are configured to be vertically long. For example, a carbon separator may be used instead of the first and second metal separators 68 and 70.

  One end edge of the power generation cell 60 in the short side direction (arrow B direction) communicates with each other in the arrow A direction, and an oxidant gas supply communication hole 72a for supplying an oxidant gas, for example, an oxygen-containing gas. A cooling medium discharge communication hole 74b for discharging the cooling medium and a fuel gas discharge communication hole 76b for discharging a fuel gas, for example, a hydrogen-containing gas, are provided.

  The other end edge of the power generation cell 60 in the short side direction communicates with each other in the direction of the arrow A, the fuel gas supply communication hole 76a for supplying the fuel gas, and the cooling medium supply communication hole for supplying the cooling medium. 74a and an oxidant gas discharge communication hole 72b for discharging the oxidant gas are provided. The cooling medium supply communication hole 74a and the cooling medium discharge communication hole 74b are set in a vertically long shape.

  The electrolyte membrane / electrode structure 66 includes, for example, a solid polymer electrolyte membrane 78 in which a thin film of perfluorosulfonic acid is impregnated with water, and an anode side electrode 80 and a cathode side electrode 82 that sandwich the solid polymer electrolyte membrane 78. With.

  A fuel gas flow path 84 that connects the fuel gas supply communication hole 76a and the fuel gas discharge communication hole 76b is formed on the surface 68a of the first metal separator 68 facing the electrolyte membrane / electrode structure 66. The fuel gas channel 84 is constituted by, for example, a groove extending in the direction of arrow C. A cooling medium flow path 86 that connects the cooling medium supply communication hole 74 a and the cooling medium discharge communication hole 74 b is formed on the surface 68 b of the first metal separator 68. The cooling medium flow path 86 is constituted by a groove portion extending in the arrow B direction.

  The surface 70a of the second metal separator 70 facing the electrolyte membrane / electrode structure 66 is provided with, for example, an oxidant gas flow path 88 formed of a groove extending in the direction of arrow C, and the oxidant gas flow path 88. Communicates with the oxidant gas supply communication hole 72a and the oxidant gas discharge communication hole 72b. A cooling medium flow path 86 is integrally formed on the surface 70 b of the second metal separator 70 so as to overlap the surface 68 b of the first metal separator 68. Although not shown, a seal member is integrally formed on the first and second metal separators 68 and 70 as necessary.

  As shown in FIG. 4, the casing 64 includes end plates 62 a and 62 b that are end plates, four panel members 90 a to 90 d disposed on the side portions of the stacked power generation cells 60, and the panel members 90 a to 90 d. 90d includes an angle member 92 that connects adjacent ends of the 90d with a bolt 91, and connecting pins 94a and 94b having different lengths that connect the end plates 62a and 62b and the panel members 90a to 90d. Panel members 90a-90d are formed of thin metal plates.

  A cooling medium inlet manifold 96a and a cooling medium outlet manifold 96b are attached to the end plate 62a so as to extend in the direction of arrow C, respectively. The cooling medium inlet manifold 96a communicates with the cooling medium supply communication hole 74a, while the cooling medium outlet manifold 96b communicates with the cooling medium discharge communication hole 74b. The cooling medium inlet manifold 96 a and the cooling medium outlet manifold 96 b communicate with the radiator 24 through the cooling medium supply pipe 28 and the cooling medium discharge pipe 30.

  A mount bracket 98 is screwed to the lower side of the end plate 62a. The mount bracket 98 is screwed to the attachment portion 102 of the fuel cell vehicle 12 via a bolt 100.

  As shown in FIGS. 6 and 7, a metal casing 104 constituting the humidifier 36 is fixed to the end plate 62 b of the fuel cell stack 14. The casing 104 is, for example, cast-molded, and a plurality of bolts 108 are inserted into the flange portion 106 that is in contact with the end plate 62b. As the bolt 108 is screwed into the end plate 62b, the casing 104 is fixed to the end plate 62b.

  Mount portions 110a and 110b are provided on both left and right sides (in the direction of arrow W) at both ends of the casing 104 in the arrow L direction. A predetermined number of bolts 112 are inserted into the mounting portions 110 a and 110 b, respectively, and the casing 112 is fixed to the mounting portion 102 by the bolts 112 being screwed into the mounting portion 102.

  As shown in FIGS. 8 and 9, an air passage pipe 114 connected to the air supply pipe 34 is provided in the casing 104, and the air passage pipe 114 is provided in the first and second humidifying sections 116a and 116b. Communicate with. The first and second humidifying portions 116a and 116b are arranged in the vertical direction, and a branch pipe branched from the off-gas supply pipe 40 is provided at the other end opposite to the connection side one end of the air passage pipe 114. 40a, 40b and a humidified air supply pipe 38 are provided.

  A return pipe 54 that connects the exhaust fuel gas pipe 52 and the fuel gas supply pipe 45 is provided in the casing 104 (see FIG. 8). The air passage pipe 114, the branch pipes 40a and 40b, the humidified air supply pipe 38, the exhaust fuel gas pipe 52, and the return pipe 54 are integrally molded with the casing 104, for example.

  As shown in FIG. 9, the 1st and 2nd humidification parts 116a and 116b are provided with the cylindrical bodies 118a and 118b. Porous tubular bodies 120a and 120b having a large number of holes are disposed at substantially the center in the cylindrical bodies 118a and 118b, and a plurality of hollow fiber membranes 122a and 122b are disposed on the outer circumferences of the porous tubular bodies 120a and 120b. It extends and accommodates in the vehicle length direction (arrow L direction). Off gas is supplied into the porous tube bodies 120a and 120b in communication with the branch tubes 40a and 40b.

  Air before reaction is supplied into the hollow fiber membranes 122 a and 122 b through a chamber 124 communicating with the air passage pipe 114. The outlet sides of the hollow fiber membranes 122 a and 122 b communicate with the humidified air supply pipe 38 through the chamber 126.

  The casing 104 is integrated with each auxiliary machine constituting the fuel gas supply mechanism 20. As shown in FIG. 6, the shut-off valve 46 is screwed and fixed to the casing 104 via a bolt 130, and the regulator 48 is screwed to the casing 104 via a bolt 132 in the vicinity of the shut-off valve 46. .

  The ejector 50 is screwed to a fuel gas introduction pipe 45a that constitutes a downstream side of the fuel gas supply pipe 45 via a bolt 134. A back pressure valve 42, which is an auxiliary machine constituting the oxidant gas supply mechanism 18, is screwed to the end of the casing 104 via a bolt 136. In addition, various other accessories can be integrated into the casing 104 by screwing or the like as necessary.

  In this embodiment, as shown in FIG. 3, a purge valve (not shown) is provided between the air supply pipe 34 constituting the oxidant gas supply mechanism 18 and the downstream side of the ejector 50 constituting the fuel gas supply mechanism 20. ) May be provided, and the fuel gas remaining in the fuel gas flow path system of the fuel cell stack 14 may be exhausted (purged) using air.

  The operation of the fuel cell system 10 configured as described above will be described below.

  First, as shown in FIG. 3, the air pump 32 that constitutes the oxidant gas supply mechanism 18 is driven, and external air that is an oxidant gas is sucked and introduced into the air supply pipe 34. This air is introduced from the air supply pipe 34 into the humidifier 36 through the air passage pipe 114.

  In the humidifier 36, as shown in FIG. 9, air is supplied from the chamber 124 into the first and second humidifiers 116a, 116b. This air passes through the insides of the plurality of hollow fiber membranes 122a and 122b accommodated in the first and second humidifying sections 116a and 116b, respectively, and moves in one axial direction (in the direction of the arrow L1) of the cylindrical bodies 118a and 118b. Then, it is supplied to the humidified air supply pipe 38.

  At that time, off-gas, which is an oxidant gas used in the reaction, is supplied from the off-gas supply pipe 40 to the branch pipes 40a and 40b. This off gas moves from the inside to the outside of the porous tube bodies 120a and 120b of the first and second humidifying sections 116a and 116b, and passes outside the plurality of hollow fiber membranes 122a and 122b, respectively. The off-gas moves to the other axial direction of the cylindrical bodies 118a and 118b (in the direction of the arrow L2), and then is released from the back pressure valve 42 to the outside.

  For this reason, moisture contained in the off-gas moves to the air before use through the hollow fiber membranes 122a and 122b, and the air before use is humidified. The humidified air is supplied from the humidified air supply pipe 38 to the oxidant gas supply communication hole 72a in the fuel cell stack 14 through the end plate 62b.

  On the other hand, in the fuel gas supply mechanism 20, as shown in FIG. 3, the fuel gas (hydrogen gas) in the fuel gas tank 44 is lowered by the regulator 48 under the opening action of the shutoff valve 46, and then passes through the ejector 50. The fuel gas supply pipe 45 is introduced into the fuel gas supply communication hole 76a in the fuel cell stack 14 through the end plate 62b.

  Further, in the cooling medium supply mechanism 16, under the action of the refrigerant pump 26, the cooling medium is introduced from the cooling medium supply pipe 28 through the end plate 62 a to the cooling medium supply communication hole 74 a in the fuel cell stack 14.

  As shown in FIG. 5, the air supplied to the power generation cell 60 in the fuel cell stack 14 is introduced into the oxidant gas flow path 88 of the second metal separator 70 from the oxidant gas supply communication hole 72a, and the electrolyte membrane / It moves along the cathode side electrode 82 of the electrode structure 66. On the other hand, the fuel gas is introduced into the fuel gas flow path 84 of the first metal separator 68 from the fuel gas supply communication hole 76 a and moves along the anode side electrode 80 of the electrolyte membrane / electrode structure 66.

  Therefore, in each electrolyte membrane / electrode structure 66, the oxygen in the air supplied to the cathode side electrode 82 and the fuel gas (hydrogen) supplied to the anode side electrode 80 undergo an electrochemical reaction in the electrode catalyst layer. To generate electricity.

  Next, the air consumed by being supplied to the cathode side electrode 82 flows along the oxidant gas discharge communication hole 72b, and then is discharged as off-gas from the end plate 62b to the off-gas supply pipe 40 (see FIG. 3).

  Similarly, the fuel gas consumed by being supplied to the anode side electrode 80 is discharged and flows into the fuel gas discharge communication hole 76b, and is discharged from the end plate 62b to the discharged fuel gas pipe 52 as discharged fuel gas. Part of the discharged fuel gas discharged to the discharged fuel gas pipe 52 is returned to the fuel gas supply pipe 45 through the return pipe 54 under the suction action of the ejector 50. The discharged fuel gas is mixed with new fuel gas and supplied into the fuel cell stack 14 from the fuel gas introduction pipe 45a. The remaining discharged fuel gas is discharged under the action of opening the purge valve 56.

  Further, as shown in FIG. 5, the cooling medium is introduced into the cooling medium flow path 86 between the first and second metal separators 68 and 70 from the cooling medium supply communication hole 74a, and then flows along the arrow B direction. To do. After cooling the electrolyte membrane / electrode structure 66, the cooling medium moves through the cooling medium discharge communication hole 74b and is discharged from the cooling medium outlet manifold 96b of the end plate 62a to the cooling medium discharge pipe 30. As shown in FIGS. 3 and 4, the cooling medium is cooled by the radiator 24 and then supplied from the cooling medium supply pipe 28 to the fuel cell stack 14 under the action of the refrigerant pump 26.

  In this case, in this embodiment, as shown in FIG. 2, the fuel cell stack 14 is mounted on the center console 22 of the fuel cell vehicle 12, and the cooling medium supply mechanism 16 travels in the direction of travel relative to the fuel cell stack 14. On the other hand, the fuel gas supply mechanism 20 is disposed on the rear side in the traveling direction (arrow L2 direction) with respect to the fuel cell stack 14 while disposed on the front side (arrow L1 direction).

  The cooling medium supply mechanism 16 is provided with a cooling medium supply pipe 28 and a cooling medium discharge pipe 30 in front of the fuel cell stack 14 in the traveling direction. For this reason, the cooling medium supply pipe 28 and the cooling medium discharge pipe 30 that connect the radiator 24 and the fuel cell stack 14 have a simplified pipe shape, and the pipe length is effectively shortened. Thereby, the pressure loss in the cooling medium supply pipe 28 and the cooling medium discharge pipe 30 can be effectively reduced, and the effect that the weight of the pipe can be favorably reduced is obtained.

  Moreover, the fuel gas supply mechanism 20 is provided with a fuel gas supply pipe 45 on the rear side of the fuel cell stack 14 in the traveling direction. Therefore, the length of the fuel gas supply pipe 45 extending from the fuel gas tank 44 to the fuel cell stack 14 is effectively shortened, and there is an advantage that fuel gas can be supplied efficiently.

  Furthermore, the power generation cell 60 is configured to be vertically long and stacked in the vehicle length direction (arrow L direction), and the humidifier 36 fixed to the fuel cell stack 14 includes hollow fiber membranes 122a and 122b in the vehicle length direction. It is configured to extend. For this reason, the fuel cell stack 14 and the humidifier 36 are configured to be narrow in the vehicle width direction (arrow W direction) and long in the vehicle length direction. A good layout can be achieved. At that time, since the fuel cell stack 14 is arranged on the center side in the vehicle width direction, the left and right weight balance of the fuel cell vehicle 12 becomes uniform.

  Moreover, the humidifier 36 is integrated with the fuel cell stack 14 directly by screwing. As a result, it is possible to satisfactorily prevent condensation from being generated by cooling the supplied air and the fuel gas (reactive gas), and to easily reduce the number of parts and reduce the weight.

1 is a schematic side view of a fuel cell vehicle on which an in-vehicle fuel cell system according to an embodiment of the present invention is mounted. FIG. 2 is a partial plan view of the fuel cell vehicle mainly including the fuel cell system. It is a schematic structure explanatory view of the fuel cell system. It is a principal part perspective explanatory drawing of the cooling-medium supply mechanism and fuel cell stack which comprise the said fuel cell system. It is a disassembled perspective explanatory drawing of the electric power generation cell which comprises the said fuel cell stack. It is a perspective explanatory view of the humidifier and the fuel cell stack which constitute the fuel cell system. It is a side view of the humidifier and the fuel cell stack. It is a front view from the attachment side of the humidifier. It is a partially notched inside explanatory drawing of the said humidifier. 6 is an explanatory diagram of a fuel cell stack vehicle mounting structure of Patent Document 1. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Fuel cell system 12 ... Fuel cell vehicle 14 ... Fuel cell stack 16 ... Coolant supply mechanism 18 ... Oxidant gas supply mechanism 20 ... Fuel gas supply mechanism 22 ... Center console 24 ... Radiators 26, 32 ... Pump 28 ... Coolant Supply pipe 30 ... Cooling medium discharge pipe 34 ... Air supply pipe 36 ... Humidifier 38 ... Humidified air supply pipe 40 ... Off gas supply pipe 42 ... Back pressure valve 44 ... Fuel gas tank 45 ... Fuel gas supply pipe 45a ... Fuel gas introduction pipe 46 ... Shut-off valve 48 ... Regulator 50 ... Ejector 52 ... Exhaust fuel gas pipe 54 ... Return pipe 60 ... Power generation cell 62a, 62b ... End plate 64, 104 ... Casing 66 ... Electrolyte membrane / electrode structure 68, 70 ... Metal separator 72a ... Oxidation Oxidant gas supply communication hole 72b ... Oxidant gas discharge communication hole 74a ... Cooling Medium supply communication hole 74b ... Cooling medium discharge communication hole 76a ... Fuel gas supply communication hole 76b ... Fuel gas discharge communication hole 78 ... Solid polymer electrolyte membrane 80 ... Anode side electrode 82 ... Cathode side electrode 84 ... Fuel gas flow path 86 ... Cooling medium flow path 88 ... Oxidant gas flow path 98 ... Mount bracket 102 ... Mounting portion 91, 100, 108, 112, 130, 132, 134, 136 ... Bolt 110a, 110b ... Mount portion 114 ... Air passage piping 116a, 116b ... Humidifying parts 122a, 122b ... Hollow fiber membrane

Claims (5)

A plurality of power generation cells are stacked, and a fuel cell stack mounted on a fuel cell vehicle;
A cooling medium supply mechanism for supplying a cooling medium to the fuel cell stack;
A reaction gas supply mechanism for supplying a reaction gas to the fuel cell stack;
With
While the cooling medium supply mechanism arranges a cooling medium pipe on the front side in the traveling direction of the fuel cell vehicle with respect to the fuel cell stack,
The in-vehicle fuel cell system, wherein the reaction gas supply mechanism has a reaction gas pipe disposed behind the fuel cell stack in the traveling direction of the fuel cell vehicle.   2. The on-vehicle fuel cell system according to claim 1, wherein the fuel cell stack is positioned on a center side in a vehicle width direction of the fuel cell vehicle, and the power generation cells are stacked in the vehicle length direction. In-vehicle fuel cell system. The fuel cell system for vehicles according to claim 2, wherein the power generation cell has an electrolyte / electrode structure in which a pair of electrodes are provided on both sides of the electrolyte, and a separator,
An in-vehicle fuel cell system characterized by being configured in a vertically long shape elongated in the vertical direction. The in-vehicle fuel cell system according to claim 1, wherein the reaction gas supply mechanism includes a fuel gas supply mechanism for supplying fuel gas,
The fuel gas supply mechanism includes a fuel tank disposed behind the fuel cell stack in the traveling direction of the fuel cell vehicle;
A fuel gas pipe which is the reaction gas pipe connecting the fuel cell stack and the fuel tank;
An in-vehicle fuel cell system comprising: 5. The in-vehicle fuel cell system according to claim 1, wherein the fuel cell stack is positioned at a rear side in a traveling direction of the fuel cell vehicle with respect to the fuel cell stack, and is a hollow fiber humidifier. As the vessels are connected,
The in-vehicle fuel cell system, wherein the hollow fiber type humidifier is installed with a hollow fiber extending in a vehicle length direction.

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