JP2014101058A - Fuel cell vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a fuel cell stack from being removed from a mount mechanism as much as possible when an external load is applied to a vehicle.SOLUTION: A fuel cell vehicle 10 includes a mount mechanism 84 on which a fuel cell stack 14 is mounted. The mount mechanism 84 includes a rear side holding part 88 which fixes the rear side of the fuel cell stack 14 to a vehicle body frame 86; and a front side holding part 90 which is attached to a vehicle body sub frame 86a forming the vehicle body frame 86 and holds the front side of the fuel cell stack 14, the front side holding part 90 bending its shape when an external load is applied to maintain a function for holding the front side of the fuel cell stack 14.

Description

  The present invention includes a fuel cell that generates power by an electrochemical reaction between a fuel gas and an oxidant gas, and a fuel cell stack in which a plurality of the fuel cells are stacked is mounted on a vehicle body frame in a vehicle front box. Regarding vehicles.

  For example, a polymer electrolyte fuel cell is a power generation cell in which an electrolyte membrane / electrode structure (MEA) in which an anode electrode and a cathode electrode are arranged on both sides of an electrolyte membrane made of a polymer ion exchange membrane is sandwiched by separators. It has. This type of fuel cell is usually used as an in-vehicle fuel cell stack by stacking a predetermined number of power generation cells.

  In a fuel cell vehicle equipped with the above fuel cell stack, for example, when an impact (external load) from the front acts on the fuel cell stack, it is necessary to protect each component such as the fuel cell stack.

  For this reason, for example, an auxiliary equipment mounting structure for a fuel cell vehicle disclosed in Patent Document 1 is known. In this auxiliary machine mounting structure, as shown in FIG. 12, a drive motor 2 is provided in the lower part of the motor room 1.

  Above the drive motor 2, a power manager 3 is fixed to the side member 5 via four mounting members 4. An auxiliary machine mounting frame 6 is bridged along the vehicle width direction on the vehicle front side of the drive motor 2 and the power manager 3, and the auxiliary machine of the vehicle is mounted on the auxiliary machine mounting frame 6.

JP 2004-243892 A

  In the above-mentioned Patent Document 1, the power manager 3 is fixed to the side member 5 via the four mounting members 4. For this reason, when an external load is applied, such as when a vehicle collides, there is a difference between the amount of retraction of the power manager 3 and the amount of retraction of the four mounting members 4 mounted on the side members 5. Easy to do. Therefore, an excessive load may be applied to the mounting member 4. As a result, the mounting member 4 may be broken, and there is a problem that the power manager 3 cannot be held.

  The present invention solves this type of problem, and suppresses the fuel cell stack from detaching from the mount mechanism as much as possible when an external load is applied to the vehicle, and simplifies the configuration. It is an object of the present invention to provide a fuel cell vehicle capable of achieving the above.

  The present invention includes a fuel cell that generates power by an electrochemical reaction between a fuel gas and an oxidant gas, and a fuel cell stack in which a plurality of the fuel cells are stacked is mounted on a vehicle body frame in a vehicle front box. It relates to vehicles.

  This fuel cell vehicle includes a mount mechanism on which the fuel cell stack is mounted. The mount mechanism holds the rear of the fuel cell stack in the vehicle vehicle length direction with respect to the vehicle body frame, holds the front of the fuel cell stack in the vehicle vehicle length direction, and is applied with an external load. At this time, a front holding portion that deforms the shape and maintains the holding function of the fuel cell stack is provided.

  Further, in this fuel cell vehicle, the front holding portion has a link structure that can be bent and deformed to fix the front of the fuel cell stack in the vehicle vehicle length direction to the vehicle body frame, and a slide structure that is movable in the vehicle length direction. It is preferable.

  Further, in this fuel cell vehicle, it is preferable that the link structure is set such that the bending angle forward in the vehicle vehicle length direction is larger than the bending angle backward in the vehicle vehicle length direction.

  Furthermore, in this fuel cell vehicle, the front holding portion includes an extendable cylinder structure that fixes the front of the fuel cell stack in the vehicle vehicle length direction to the vehicle body frame, and a fluid release structure that releases the fluid in the cylinder structure. The cylinder structure preferably includes a slide structure that is movable in the vehicle length direction.

  According to the present invention, when an external load is applied to the mount mechanism from the front in the vehicle longitudinal direction of the fuel cell vehicle, the external load acts on the front holding portion constituting the mount mechanism.

  Here, the front holding portion is deformed rearward in the vehicle vehicle length direction and maintains the holding function of the fuel cell stack in the vehicle vehicle length direction front. For this reason, when an external load is applied to the vehicle, it is possible to suppress the separation of the fuel cell stack from the mount mechanism as much as possible, and to simplify the configuration.

It is principal part side surface explanatory drawing of the fuel cell vehicle which concerns on the 1st Embodiment of this invention. It is a principal part disassembled perspective explanatory drawing of the said fuel cell vehicle. It is a fuel cell stack which comprises the said fuel cell vehicle, and the principal part disassembled perspective explanatory drawing of a housing | casing. It is a principal part disassembled perspective view of the fuel cell which comprises the said fuel cell stack. It is a disassembled perspective explanatory drawing of the front holding part which comprises the mount mechanism provided in the said fuel cell vehicle. It is operation | movement explanatory drawing of the said front holding | maintenance part. It is operation | movement explanatory drawing of the said front holding | maintenance part when an external load is provided. It is principal part side explanatory drawing of the fuel cell vehicle which concerns on the 2nd Embodiment of this invention. It is a principal part disassembled perspective explanatory drawing of the front holding part which comprises the mount mechanism provided in the said fuel cell vehicle. It is principal part side explanatory drawing of the fuel cell vehicle which concerns on the 3rd Embodiment of this invention. It is operation | movement explanatory drawing of the front holding part which comprises the mount mechanism at the time of an external load being provided. It is a plane explanatory view of the auxiliary equipment mounting structure currently indicated by patent documents 1.

  As shown in FIGS. 1 and 2, the fuel cell vehicle 10 according to the first embodiment of the present invention includes a fuel cell stack 14 accommodated in a vehicle front box (so-called motor room) 12.

  The fuel cell stack 14 is housed in a housing 16 and, as shown in FIG. 3, a vehicle width direction (arrow) in which a plurality of fuel cells 18 intersect the vehicle length direction (arrow L direction) of the fuel cell vehicle 10. (H direction).

  As shown in FIG. 3, in the fuel cell stack 14, a plurality of fuel cells 18 are stacked in the horizontal direction (in the direction of arrow H) in a standing posture. At one end in the stacking direction of the plurality of fuel cells 18, a first terminal plate 20a, a first insulating plate 22a, and a first end plate 24a are sequentially disposed outward. At the other end in the stacking direction of the fuel cell 18, a second terminal plate 20b, a second insulating plate 22b, and a second end plate 24b are sequentially disposed outward.

  A first output terminal 26a connected to the first terminal plate 20a extends from the central portion of the first end plate 24a. A second output terminal 26b connected to the second terminal plate 20b extends from the center of the second end plate 24b.

  Both ends of a connecting bar (fastening member) 28 are fixed by screws 30 between the long sides of the first end plate 24a and the second end plate 24b. Both ends of the connecting bar 28 are fixed by screws 30 between the short sides of the first end plate 24a and the second end plate 24b. Each connecting bar 28 applies a tightening load in the stacking direction (arrow H direction) to the plurality of stacked fuel cells 18 of the fuel cell stack 14.

  As shown in FIG. 4, the fuel cell 18 has a horizontally long rectangular shape, and the electrolyte membrane / electrode structure 40 is sandwiched between the first separator 42 and the second separator 44. The 1st separator 42 and the 2nd separator 44 are comprised by metal separators and carbon separators, such as a steel plate, a stainless steel plate, an aluminum plate, or a plating treatment steel plate, for example.

  One end edge of the fuel cell 18 in the arrow L direction (horizontal direction in FIG. 4) communicates with each other in the arrow H direction, which is the stacking direction, to oxidize for supplying an oxidant gas, for example, an oxygen-containing gas An agent gas inlet communication hole 46a and a fuel gas outlet communication hole 48b for discharging a fuel gas, for example, a hydrogen-containing gas, are arranged in the arrow T direction (vertical direction).

  The other end edge of the fuel cell 18 in the arrow L direction communicates with each other in the arrow H direction, and a fuel gas inlet communication hole 48a for supplying fuel gas and an oxidant gas for discharging oxidant gas. The outlet communication holes 46b are arranged in the arrow T direction.

  A pair of cooling medium inlet communication holes 50a for supplying a cooling medium is provided at the upper end edge in the arrow T direction of the fuel cell 18, and the lower end edge in the arrow T direction of the fuel cell 18 A pair of cooling medium outlet communication holes 50b for discharging the cooling medium is provided.

  An oxidant gas flow path 52 communicating with the oxidant gas inlet communication hole 46a and the oxidant gas outlet communication hole 46b is provided on the surface 42a of the first separator 42 facing the electrolyte membrane / electrode structure 40. A fuel gas passage 54 communicating with the fuel gas inlet communication hole 48 a and the fuel gas outlet communication hole 48 b is provided on the surface 44 a of the second separator 44 facing the electrolyte membrane / electrode structure 40.

  A cooling medium that connects the cooling medium inlet communication hole 50a and the cooling medium outlet communication hole 50b between the surface 42b of the first separator 42 and the surface 44b of the second separator 44 that constitute the fuel cells 18 adjacent to each other. A flow path 56 is provided.

  The first separator 42 and the second separator 44 are respectively provided with seal members 58 and 60 integrally or individually. The sealing members 58 and 60 are made of, for example, EPDM, NBR, fluorine rubber, silicone rubber, fluorosilicone rubber, butyl rubber, natural rubber, styrene rubber, chloroplane, acrylic rubber, or other sealing material, cushioning material, packing material, etc. A sealing member having elasticity is used.

  The electrolyte membrane / electrode structure 40 includes, for example, a solid polymer electrolyte membrane 62 in which a perfluorosulfonic acid thin film is impregnated with water, and a cathode electrode 64 and an anode electrode 66 that sandwich the solid polymer electrolyte membrane 62. Prepare.

  The cathode electrode 64 and the anode electrode 66 are an electrode catalyst formed by uniformly applying a gas diffusion layer made of carbon paper or the like and porous carbon particles having a platinum alloy supported on the surface thereof to the surface of the gas diffusion layer. And having a layer. The electrode catalyst layers are formed on both surfaces of the solid polymer electrolyte membrane 62.

  As shown in FIG. 3, the housing 16 has a plurality of, for example, two split members 70 a and 70 b having split surfaces along the length direction (arrow H direction) on the long side of the fuel cell 18. The divided members 70a and 70b are configured by, for example, a member obtained by press-molding an aluminum plate material, a member obtained by press-forming a steel plate (stainless steel plate), or the like. Note that the housing 16 is not limited to the shape of the two divided members 70a and 70b, and may have a shape as the housing 16 as a whole, and a plurality of divided members having various shapes are employed. can do.

  Flange portions 72a and 72a projecting outward (vertical direction) are provided at the opening side end portions extending in the length direction of the dividing member 70a, and the flange portion 72a constitutes a dividing surface. Each flange portion 72a is provided with a plurality of hole portions 74a separated by a predetermined interval.

  Similarly, the split member 70b is provided with an outwardly projecting flange portion 72b at an opening side end portion extending in the length direction, and the flange portion 72b constitutes a split surface.

  Each flange portion 72b is formed with a plurality of hole portions 74b disposed coaxially with each hole portion 74a. Bolts 76 are integrally inserted into the holes 74a and 74b arranged coaxially, and the nuts 77 are screwed into the bolts 76, so that the divided members 70a and 70b are joined together.

  The first end plate 24a includes an oxidant gas inlet communication hole 46a, an oxidant gas outlet communication hole 46b, an oxidant gas supply manifold 80a communicating with the fuel gas inlet communication hole 48a and the fuel gas outlet communication hole 48b, and an oxidant gas. A discharge manifold 80b, a fuel gas supply manifold 82a, and a fuel gas discharge manifold 82b are attached.

  The second end plate 24b includes a pair of cooling medium inlet communication holes 50a, a pair of cooling medium supply manifolds (not shown) communicating with the pair of cooling medium outlet communication holes 50b, and a pair of cooling medium discharge manifolds (not shown). ) Is attached

  Instead of the above configuration, all the manifolds (oxidant gas supply manifold 80a, oxidant gas discharge manifold 80b, fuel gas supply manifold 82a, fuel gas discharge manifold 82b, and a pair of cooling media are provided on the first end plate 24a. A supply manifold and a pair of cooling medium discharge manifolds) may be provided.

  As shown in FIGS. 1 and 2, the fuel cell vehicle 10 includes a mount mechanism 84 on which the fuel cell stack 14 is mounted. The mounting mechanism 84 includes a rear holding portion 88 that fixes the fuel cell stack 14 rearward in the vehicle vehicle length direction with respect to the vehicle body frame 86 that is a vehicle side component member, and a vehicle body subframe that constitutes the vehicle body frame 86. 86a is a front holding portion that holds the front of the fuel cell stack 14 in the longitudinal direction of the vehicle and that is bent and deformed when an external load F is applied and maintains the holding function of the fuel cell stack 14. 90.

  The rear holding portion 88 includes a pair of fixing members 92 that are fixed to both sides of the lower portion on the rear end side of the housing 16. Each fixing member 92 has a hole 92 a, and a bolt 94 is inserted into the hole 92 a, and when the bolt 94 is screwed into the vehicle body frame 86, the rear holding portion 88 moves to the vehicle body frame 86. Fixed to impossible. Note that the rear holding portion 88 may be fixed to the vehicle body subframe 86a through a bracket so as not to move. Further, the fuel cell stack 14 itself may be directly fixed to the vehicle body frame 86.

  The front holding unit 90 includes a link structure 96 that can be bent and deformed and fixed to the vehicle body sub-frame 86a in front of the fuel cell stack 14 in the vehicle vehicle length direction, and a slide structure 98 that is movable in the vehicle length direction.

  As shown in FIG. 5, the link structure 96 swings to the upper link member 100 that is fixed to a substantially central portion in the width direction (arrow H direction) with respect to the front bottom portion of the housing 16. And a lower link member 102 connected so as to be capable of (rotating). Two upper link members 100 may be provided on both sides of the casing 16 in the vehicle width direction. The slide structure 98 includes a lower link member 102 and an attachment portion 104 provided on the vehicle body subframe 86a.

  Specifically, the upper link member 100 integrally has a plate-like fixing portion 100a that is screwed to the bottom portion of the housing 16 on one end side (upper end side). In the upper link member 100, engagement surfaces 106a and 106b having predetermined inclination angles are formed at the other end (lower end) opposite to the plate-like fixing portion 100a. A hole 108 is provided between the engagement surfaces 106a and 106b.

  Engagement surfaces 110a and 110b each having a predetermined angle are provided at one end of the lower link member 102 on the upper link member 100 side. A plate-like portion 112a is bulged and formed at one end of the lower link member 102, and a hole 114 is formed in the plate-like portion 112a. A plate-like portion 112b bulges out at the other end of the lower link member 102, and a long elongated hole 116 is formed in the plate-like portion 112b in parallel with the width direction (arrow L direction).

  A plate member 118 is disposed on the side surface of the lower link member 102 opposite to the plate-like portions 112a and 112b. The plate member 118 is provided with a hole 120 coaxially with the hole 114 of the lower link member 102 on one end side, and a long hole 122 is formed on the other end side so as to face the long hole 116. Note that the lower link member 102 and the plate member 118 may be integrally formed.

  The upper link member 100 is interposed between the plate-like portion 112a of the lower link member 102 and the upper portion of the plate member 118, and the bolts 124 are integrally inserted into the holes 114, 108 and 120, and the nut 126 is inserted. Screwed onto the bolt 124. In place of the bolt 124, a pin (not shown) that does not move in the axial direction may be used.

  A hole 128 is formed in the attachment portion 104, and the attachment portion 104 is sandwiched between the plate-like portion 112 b and the plate member 118 of the lower link member 102. A bolt 130 is integrally inserted into the long hole 116, the hole 128, and the long hole 122, and a nut 132 is screwed into the bolt 130. Instead of the bolt 130, a pin (not shown) that does not move in the axial direction may be used.

  As shown in FIG. 6, in the link structure 96, the engagement surfaces 106a and 106b of the upper link member 100 and the engagement surfaces 110a and 110b of the lower link member 102 are separated from each other in a normal attachment state. At this time, the angle α1 ° formed by the engagement surfaces 106a and 110a is set to be larger than the angle α2 ° formed by the engagement surfaces 106b and 110b (α1 °> α2 °). That is, the lower link member 102 can be largely bent and deformed forward (see the two-dot chain line) with respect to the upper link member 100, while the bending deformation is restricted on the rear side.

  As shown in FIG. 7, when the external load F is applied, the vehicle body subframe 86a is bent or crushed, so that the fuel cell stack 14 side can be receded linearly. When the vehicle body subframe 86a is bent or crushed, the long holes 116 and 122 are arranged in a posture extending along the arrow T direction. Therefore, the slide structure 98 can be reduced in the arrow T direction.

  As shown in FIG. 1, the body frame 86 is provided with various devices as necessary in addition to the traveling motor 134. A fuel cell cooling radiator 136 and the like are disposed on the vehicle body subframe 86a.

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

  First, as shown in FIGS. 3 and 4, an oxidant gas such as an oxygen-containing gas is supplied from the oxidant gas supply manifold 80a to the oxidant gas inlet communication hole 46a, and the fuel gas inlet from the fuel gas supply manifold 82a. A fuel gas such as a hydrogen-containing gas is supplied to the communication hole 48a. Further, a cooling medium such as pure water, ethylene glycol, or oil is supplied from the cooling medium supply manifold to the cooling medium inlet communication hole 50a.

  Therefore, as shown in FIG. 4, the oxidant gas is introduced into the oxidant gas flow path 52 of the first separator 42 from the oxidant gas inlet communication hole 46a. The oxidant gas is supplied to the cathode electrode 64 constituting the electrolyte membrane / electrode structure 40 while moving in the arrow L direction.

  On the other hand, the fuel gas is introduced into the fuel gas channel 54 of the second separator 44 from the fuel gas inlet communication hole 48a. This fuel gas is supplied to the anode electrode 66 constituting the electrolyte membrane / electrode structure 40 while moving in the direction of arrow L.

  Therefore, in the electrolyte membrane / electrode structure 40, the oxidant gas supplied to the cathode electrode 64 and the fuel gas supplied to the anode electrode 66 are consumed by an electrochemical reaction in the electrode catalyst layer to generate power. Is called. As a result, since electric power is supplied to the traveling motor 134, the fuel cell vehicle 10 can travel.

  Next, the oxidant gas consumed by being supplied to the cathode electrode 64 flows in the direction of arrow H along the oxidant gas outlet communication hole 46b, and is discharged from the oxidant gas discharge manifold 80b (see FIG. 3). On the other hand, the consumed fuel gas supplied to the anode electrode 66 flows in the direction of arrow H along the fuel gas outlet communication hole 48b, and is discharged from the fuel gas discharge manifold 82b.

  The cooling medium supplied to the pair of cooling medium inlet communication holes 50 a is introduced into the cooling medium flow path 56 between the first separator 42 and the second separator 44, and then flows in the direction of arrow T. The cooling medium cools the electrolyte membrane / electrode structure 40, then flows through the pair of cooling medium outlet communication holes 50b, and is discharged from the cooling medium discharge manifold.

  The fuel cell vehicle 10 travels while being supplied with electric power from the fuel cell stack 14 as described above. At that time, as shown in FIG. 1, when an external load F that is an impact is applied to the fuel cell vehicle 10 from the front in the direction of the arrow Lb, the front portion of the fuel cell vehicle 10 is easily deformed inside.

  In this case, in the first embodiment, the mount mechanism 84 on which the fuel cell stack 14 is mounted includes a rear holding portion 88 and a front holding portion 90. The rear holding portion 88 is fixed in a state in which the pair of fixing members 92 cannot move to the vehicle body frame 86. The front holding unit 90 includes a link structure 96 and a slide structure 98.

  Therefore, when an external load F is applied to the fuel cell vehicle 10 and the vehicle body subframe 86a is deformed rearward in the vehicle vehicle length direction, the distance between the vehicle body subframe 86a and the fuel cell stack 14 approaches.

  Here, in the link structure 96, the upper link member 100 and the lower link member 102 are connected to each other so as to be rotatable (swingable) with a bolt 124 as a fulcrum. Accordingly, as shown by a two-dot chain line in FIG. 6, the lower link member 102 swings forward (bend deformation) with respect to the upper link member 100. Thus, the external load F applied to the vehicle body subframe 86a is not directly transmitted to the fuel cell stack 14, but can be absorbed by the bending deformation of the link structure 96.

  Moreover, the front holding portion 90 constitutes a slide structure 98. Therefore, when the vehicle body sub-frame 86a is deformed inward, the lower link member 102 and the plate member 118 are engaged with the elongated holes 116 and 122 and the bolts 130, and the lower side is relative to the vehicle body sub-frame 86a. The position is adjusted in the vehicle length direction (arrow L direction).

  Therefore, the link structure 96 can be reliably bent and deformed to reliably absorb the external load F. Thereby, the effect that the state connected with the attaching part 104 and the vehicle body sub-frame 86a is maintained, without removing the fuel cell stack 14 from the mount mechanism 84 is acquired.

  FIG. 8 is an explanatory side view of a main part of a fuel cell vehicle 140 according to the second embodiment of the present invention. Note that the same components as those of the fuel cell vehicle 10 according to the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. Similarly, in the third embodiment described below, detailed description thereof is omitted.

  The fuel cell vehicle 140 includes a mount mechanism 142 on which the fuel cell stack 14 is mounted. The mount mechanism 142 is attached to the rear holding portion 88 and the vehicle body subframe 86a, holds the front of the fuel cell stack 14 in the vehicle vehicle length direction, and expands and contracts in shape when an external load F is applied. A front holding portion 144 that maintains the holding function of the fuel cell stack 14 is provided.

  As shown in FIGS. 8 and 9, the front holding portion 144 includes an extendable cylinder structure 146 that fixes the front of the fuel cell stack 14 in the vehicle vehicle length direction to the vehicle body subframe 86 a, and fluid in the cylinder structure 146. A fluid release structure 148 to be opened and a slide structure 150 capable of moving the cylinder structure 146 in the vehicle length direction are provided.

  The cylinder structure 146 includes a cylinder portion 152 and a rod portion 154 that is disposed so as to be movable back and forth with respect to the cylinder portion 152. A plate-like fixing portion 152a fixed to the bottom surface of the housing 16 is integrally provided at the upper end portion of the cylinder portion 152, and a fluid such as air or oil is introduced into the inside thereof.

  A chamber portion 156 constituting the fluid release structure 148 is formed to bulge out on the side portion of the cylinder portion 152. The chamber portion 156 communicates with the cylinder portion 152, and a breaking portion 158 that opens the chamber portion 156 to the outside is attached to a side portion of the chamber portion 156.

  The breaking portion 158 is driven, for example, via an actuator (not shown), and pierces the chamber portion 156 to open the chamber portion 156 outward. The breaking portion 158 may be disposed in the fuel cell vehicle 140 and may adopt a mechanical structure that pushes the breaking portion 158 against the chamber portion 156 at the time of collision.

  An attachment portion 160 constituting the slide structure 150 is provided at the distal end portion of the rod portion 154, and the attachment portion 160 is formed with a long hole 162 extending in the vehicle length direction. The vehicle body sub-frame 86a is provided with support plate portions 164 disposed on both sides of the attachment portion 160, and the support plate portion 164 has holes 166 formed therein.

  A mounting portion 160 is disposed between the pair of support plate portions 164. In this state, the bolt 168 is integrally inserted into the hole 166, the long hole 162, and the hole 166, and the nut 170 is screwed into the bolt 168. Instead of the bolt 168, a pin (not shown) that does not move in the axial direction may be used.

  In the second embodiment configured as described above, when the external load F is applied to the fuel cell vehicle 140 from the front and the vehicle body subframe 86a is deformed to the inside, the chamber portion 156 is externally connected via the fracture portion 158. Released. For this reason, the air or oil enclosed in the cylinder part 152 is discharged | emitted outside, and a damper function is cancelled | released.

  Accordingly, the rod portion 154 enters the inside of the cylinder portion 152, and the attachment portion 160 on which the slide structure 150 is installed slides inward. As a result, the front holding portion 144 expands and contracts and maintains the front holding function of the fuel cell stack 14 in the vehicle vehicle length direction.

  For this reason, when an external load F is applied to the fuel cell vehicle 140, the fuel cell stack 14 is not detached from the mount mechanism 142, and the state where the fuel cell stack 14 is connected to the attachment portion 160 and the vehicle body subframe 86a is maintained. The same effect as the first embodiment is obtained.

  FIG. 10 is an explanatory side view of a main part of a fuel cell vehicle 180 according to the third embodiment of the present invention.

  The fuel cell vehicle 180 includes a mount mechanism 182 on which the fuel cell stack 14 is mounted. The mount mechanism 182 is attached to the rear holding portion 88 and the vehicle body subframe 86a, holds the front of the fuel cell stack 14 in the vehicle vehicle length direction, and expands and contracts in shape when an external load F is applied. A front holding portion 184 that maintains the holding function of the fuel cell stack 14 is provided.

  The front holding portion 184 has a link structure 186 that can be bent and deformed and fixed to the vehicle body sub-frame 86a in front of the fuel cell stack 14 in the vehicle vehicle length direction, and a slide structure 98 that is movable in the vehicle length direction.

  The link structure 186 includes an upper link member 100, a lower link member 102, and an intermediate link member 188 disposed between the upper link member 100 and the lower link member 102. The connection structure between the upper link member 100 and the intermediate link member 188 and the connection structure between the intermediate link member 188 and the lower link member 102 are the connection between the upper link member 100 and the lower link member 102 of the first embodiment. The structure is the same.

  Therefore, as shown in FIG. 11, when the external load F is applied, the vehicle body sub-frame 86a is bent or crushed, whereby the fuel cell stack 14 side can be receded linearly. In addition, since the number of dividing members is increased, it is possible to cope with the deformation ahead of the fuel cell stack 14 more greatly, and the effect that the fuel cell stack 14 can be more reliably protected is obtained.

DESCRIPTION OF SYMBOLS 10, 140, 180 ... Fuel cell vehicle 12 ... Vehicle front box 14 ... Fuel cell stack 18 ... Fuel cells 24a, 24b ... End plate 40 ... Electrolyte membrane electrode assembly 42, 44 ... Separator 46a ... Oxidant gas inlet communication hole 46b ... Oxidant gas outlet communication hole 48a ... Fuel gas inlet communication hole 48b ... Fuel gas outlet communication hole 50a ... Cooling medium inlet communication hole 50b ... Cooling medium outlet communication hole 52 ... Oxidant gas flow channel 54 ... Fuel gas flow channel 56 ... Cooling medium flow path 62 ... Solid polymer electrolyte membrane 64 ... Cathode electrode 66 ... Anode electrode 84, 142, 182 ... Mount mechanism 86 ... Car body frame 86a ... Car body sub-frame 88 ... Rear holding part 90, 144,184 ... Holding front Portion 92 ... Fixing member 96, 186 ... Link structure 98, 150 ... Slide structure 100 ... Upper link Material 102 ... Lower link member 104, 160 ... Mounting portion 106a, 106b, 110a, 110 ... Engagement surface 116, 122, 162 ... Long hole 118 ... Plate member 146 ... Cylinder structure 148 ... Fluid release structure 152 ... Cylinder portion 154 ... Rod portion 156 ... Chamber portion 164 ... Support plate portion 188 ... Intermediate link member

Claims (4)

A fuel cell vehicle having a fuel cell that generates electricity by an electrochemical reaction between a fuel gas and an oxidant gas, and mounting a fuel cell stack in which a plurality of the fuel cells are stacked on a vehicle body frame in a vehicle front box. ,
A mounting mechanism on which the fuel cell stack is mounted;
The mount mechanism includes a rear holding portion that fixes the rear of the fuel cell stack in the vehicle vehicle length direction with respect to the vehicle body frame;
A front holding portion that holds the front of the fuel cell stack in the vehicle longitudinal direction and deforms the shape when an external load is applied, and maintains the holding function of the fuel cell stack;
A fuel cell vehicle comprising: 2. The fuel cell vehicle according to claim 1, wherein the front holding portion has a link structure that can be bent and deformed to fix a front of the fuel cell stack in the vehicle vehicle length direction to the vehicle body frame,
A slide structure that can move in the vehicle length direction,
A fuel cell vehicle comprising:   3. The fuel cell vehicle according to claim 2, wherein the link structure has a bending angle forward in the vehicle vehicle length direction larger than a bending angle backward in the vehicle vehicle length direction. Fuel cell vehicle. 2. The fuel cell vehicle according to claim 1, wherein the front holding portion is a telescopic cylinder structure that fixes the front of the fuel cell stack in the vehicle vehicle length direction to the vehicle body frame;
A fluid release structure for releasing fluid in the cylinder structure;
A slide structure capable of moving the cylinder structure in a vehicle length direction;
A fuel cell vehicle comprising:

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