JP6090996B2 - Fuel cell stack - Google Patents

Description

  The present invention relates to a fuel cell stack including a fuel cell that generates electric power by an electrochemical reaction between a fuel gas and an oxidant gas, wherein a plurality of the fuel cells are stacked and end plates are disposed at both ends in the stacking direction. .

  For example, in a polymer electrolyte fuel cell, an electrolyte membrane / electrode structure in which an anode electrode is disposed on one side of an electrolyte membrane made of a polymer ion exchange membrane and a cathode electrode is disposed on the other side of the electrolyte membrane ( MEA). The MEA is sandwiched between separators to constitute a power generation cell. This fuel cell is usually used as, for example, an in-vehicle fuel cell stack by stacking a predetermined number of power generation cells.

  In this fuel cell stack, in particular, when used for in-vehicle use, an external load is easily applied in addition to shaking and vibration. Therefore, it is necessary to firmly fix the fuel cell stack to the vehicle. For this reason, for example, a vehicle-mounted fuel cell stack disclosed in Patent Document 1 is known.

  The fuel cell stack includes a mount structure for mounting the fuel cell stack on a vehicle. The mount structure is provided on one end plate disposed on one end side in the stacking direction of the fuel cell stack, and includes a fixing support means for holding the one end plate side on the vehicle via a rubber mount. The mount structure is provided on the other end plate disposed on the other end side in the stacking direction of the fuel cell stack, and the other end plate side is held movably in the stacking direction with respect to the vehicle via a rubber mount. Movable support means is provided.

JP 2001-143742 A

By the way, in the above-mentioned Patent Document 1, the fixed support means is provided protruding outward from one end plate, and the movable support means is provided protruding outward from the other end plate. For this reason, a space for providing the fixed support means and the movable support means as the mount members at the installation site (for example, in the vehicle) of the fuel cell stack is required. Accordingly, the installation space for the fuel cell stack may be increased.

  The present invention solves this type of problem, and an object thereof is to provide a fuel cell stack capable of reliably installing a fuel cell stack at a desired installation site with a compact and simple configuration. .

  The present invention relates to a fuel cell stack including a fuel cell that generates electric power by an electrochemical reaction between a fuel gas and an oxidant gas, wherein a plurality of the fuel cells are stacked and end plates are disposed at both ends in the stacking direction. Is.

  This fuel cell stack includes a mount structure for mounting the fuel cell stack on an installation site. The mount structure includes two stacked plates provided between the bottoms of a pair of end plates, and a plate member interposed between the two plates, and a fuel cell stack is installed on the plate member A fastening portion for fixing to the site is provided.

Further, in this fuel cell stack, end plates has a rectangular shape, the plate member has first a first plate member disposed on one side of each end plate is positioned opposite side of the one side of each end plate And a two-plate member.

  Furthermore, in this fuel cell stack, it is preferable that one or two fastening portions are provided on the first plate member, and two fastening portions are provided on the second plate member.

  Furthermore, in this fuel cell stack, the fastening portion is preferably fixed to the installation site via a connecting member having an elastic body.

  In this fuel cell stack, the installation site is preferably a vehicle-side frame that constitutes a fuel cell vehicle.

  According to the present invention, the mount structure is provided with two stacked plates between the bottom portions of the pair of end plates, and a plate member provided with a fastening portion is interposed between the two plates. Yes. For this reason, the mount structure is made compact and the configuration is easily simplified. Accordingly, the fuel cell stack can be reliably installed at a desired installation site with a compact and simple configuration.

1 is a schematic plan view of a fuel cell electric vehicle equipped with a fuel cell stack according to a first embodiment of the present invention. It is a schematic perspective view of the fuel cell stack. It is a partially exploded perspective view of the fuel cell stack. It is a principal part disassembled perspective explanatory drawing of the fuel cell which comprises the said fuel cell stack. FIG. 5 is a cross-sectional explanatory view taken along a line VV in FIG. 2 of a casing constituting the fuel cell stack. It is a disassembled perspective explanatory drawing of the upper side panel which comprises the said casing. It is a disassembled perspective explanatory drawing of the lower side panel which comprises the said casing. FIG. 8 is a sectional view of the lower side panel taken along line VIII-VIII in FIG. 7. It is a partial cross section perspective explanatory view of a mount structure and the casing. It is side surface explanatory drawing of FIG. FIG. 5 is a schematic perspective explanatory view of a fuel cell stack according to a second embodiment of the present invention. It is a disassembled perspective explanatory drawing of the lower side panel which comprises a casing. It is side surface explanatory drawing of the said casing and mount structure. It is a schematic perspective view of a fuel cell stack according to a third embodiment of the present invention. It is a disassembled perspective explanatory drawing of the lower side panel which comprises a casing.

  As shown in FIG. 1, the fuel cell stack 10 according to the first embodiment of the present invention is accommodated in a front box (so-called motor room) 12f of a fuel cell electric vehicle (fuel cell vehicle) 12, for example. The fuel cell stack 10 includes a fuel cell 14 and a casing 16 that houses the plurality of stacked fuel cells 14 (see FIGS. 1 to 3). As shown in FIG. 2, the casing 16 is mounted on a vehicle body frame (installation site) 12 </ b> S constituting the fuel cell electric vehicle 12 via a mount structure 18. In addition, the accommodation place of the fuel cell stack 10 is not limited to the front box 12f, and may be, for example, the vehicle center part under the floor or the vicinity of the rear trunk.

  As shown in FIG. 3, the fuel cell 14 is stacked in the vehicle width direction (arrow B direction) intersecting the vehicle length direction (vehicle traveling direction) (arrow A direction) of the fuel cell electric vehicle 12 in the standing position. . At one end in the stacking direction of the fuel cell 14, a first terminal plate 20a, a first insulating plate 22a, and a first end plate 24a are sequentially arranged outward. At the other end of the fuel cell 14 in the stacking direction, a second terminal plate 20b, a second insulating plate 22b, and a second end plate 24b are sequentially disposed outward.

  The first power output terminal 26a connected to the first terminal plate 20a faces outward from a substantially central portion (which may be eccentric from the central portion) of the horizontally long (rectangular) first end plate 24a. Extend. A second power output terminal 26b connected to the second terminal plate 20b extends outward from a substantially central portion of the horizontally long (rectangular) second end plate 24b.

  Between each side of the first end plate 24a and the second end plate 24b, a connecting bar 28 having a certain length corresponding to the center position of each side is arranged. Both ends of the connecting bar 28 are fixed by screws 30 to apply a tightening load in the stacking direction (arrow B direction) to the plurality of stacked fuel cells 14.

  As shown in FIG. 4, the fuel cell 14 includes an electrolyte membrane / electrode structure 32, and a cathode separator 34 and an anode separator 36 that sandwich the electrolyte membrane / electrode structure 32.

  The cathode-side separator 34 and the anode-side separator 36 are made of, for example, a steel plate, a stainless steel plate, an aluminum plate, a plated steel plate, or a metal plate that has been subjected to a corrosion-proof surface treatment. The cathode-side separator 34 and the anode-side separator 36 have a rectangular planar shape, and are formed into a concavo-convex shape by pressing a metal thin plate into a wave shape. For example, a carbon separator may be used for the cathode side separator 34 and the anode side separator 36 instead of the metal separator.

  The cathode side separator 34 and the anode side separator 36 have a horizontally long shape, the long side extends in the horizontal direction (arrow A direction), and the short side extends in the gravity direction (arrow C direction). In addition, you may arrange | position so that a short side may extend in a horizontal direction and a long side may extend in a gravitational direction.

  An oxidant gas supply communication hole 38a for supplying an oxidant gas, for example, an oxygen-containing gas, communicates with each other in the arrow B direction at one end edge of the long side direction (arrow A direction) of the fuel cell 14. A fuel gas supply communication hole 40a for supplying a fuel gas, for example, a hydrogen-containing gas, is provided.

  The other end edge in the long side direction of the fuel cell 14 communicates with each other in the direction of arrow B, and a fuel gas discharge communication hole 40b for discharging the fuel gas, and an oxidant gas for discharging the oxidant gas. A discharge communication hole 38b is provided.

  The fuel cell 14 is in communication with each other in the direction of arrow B on one side of both ends in the short side direction (arrow C direction), that is, on the side of the oxidant gas supply communication hole 38a and the fuel gas supply communication hole 40a. Two cooling medium supply communication holes 42a for supplying the cooling medium are provided on opposite sides. The cooling medium is discharged by communicating with each other in the direction of arrow B on the other side of both ends in the short side direction of the fuel cell 14, that is, on the fuel gas discharge communication hole 40b and the oxidant gas discharge communication hole 38b side. Two cooling medium discharge communication holes 42b are provided on opposite sides.

  The electrolyte membrane / electrode structure 32 includes, for example, a solid polymer electrolyte membrane 44 in which a perfluorosulfonic acid thin film is impregnated with water, and a cathode electrode 46 and an anode electrode 48 that sandwich the solid polymer electrolyte membrane 44. Prepare.

  The cathode electrode 46 and the anode electrode 48 are formed by uniformly applying a gas diffusion layer (not shown) made of carbon paper or the like and porous carbon particles carrying a platinum alloy on the surface thereof to the surface of the gas diffusion layer. And an electrode catalyst layer (not shown) to be formed. The electrode catalyst layer is formed on both surfaces of the solid polymer electrolyte membrane 44, for example.

  An oxidant gas flow path 50 that connects the oxidant gas supply communication hole 38a and the oxidant gas discharge communication hole 38b is formed on the surface 34a of the cathode separator 34 facing the electrolyte membrane / electrode structure 32. The oxidant gas channel 50 is formed by a plurality of wavy channel grooves (or straight channel grooves) extending in the direction of arrow A.

  A fuel gas flow path 52 that connects the fuel gas supply communication hole 40a and the fuel gas discharge communication hole 40b is formed on the surface 36a of the anode separator 36 facing the electrolyte membrane / electrode structure 32. The fuel gas channel 52 is formed by a plurality of wave-like channel grooves (or straight channel grooves) extending in the direction of arrow A.

  Between the surface 36b of the anode side separator 36 and the surface 34b of the adjacent cathode side separator 34, there is a cooling medium flow channel 54 communicating with the cooling medium supply communication holes 42a, 42a and the cooling medium discharge communication holes 42b, 42b. It is formed. The cooling medium flow channel 54 circulates the cooling medium over the electrode range of the electrolyte membrane / electrode structure 32.

  A first seal member 56 is integrally formed on the surfaces 34 a and 34 b of the cathode side separator 34 around the outer peripheral edge of the cathode side separator 34. A second seal member 58 is integrally formed on the surfaces 36 a and 36 b of the anode side separator 36 around the outer peripheral edge of the anode side separator 36.

  As the first seal member 56 and the second seal member 58, for example, EPDM, NBR, fluorine rubber, silicone rubber, fluorosilicone rubber, butyl rubber, natural rubber, styrene rubber, chloroprene or acrylic rubber or the like, cushion material Alternatively, an elastic seal member such as a packing material is used.

  As shown in FIG. 3, the oxidant gas communicating with the oxidant gas supply communication hole 38a, the oxidant gas discharge communication hole 38b, the fuel gas supply communication hole 40a, and the fuel gas discharge communication hole 40b is connected to the first end plate 24a. A supply manifold 60a, an oxidant gas discharge manifold 60b, a fuel gas supply manifold 62a, and a fuel gas discharge manifold 62b are attached.

  As shown in FIG. 1, a cooling medium supply manifold 64a and a cooling medium discharge manifold 64b communicating with the pair of cooling medium supply communication holes 42a and the pair of cooling medium discharge communication holes 42b are attached to the second end plate 24b.

  The casing 16 includes a first end plate 24a and a second end plate 24b at two sides (surfaces) at both ends in the vehicle width direction (arrow B direction). As shown in FIGS. 3 and 5, two sides (surfaces) at both ends in the vehicle length direction (arrow A direction) of the casing 16 are constituted by a front side panel 66 and a rear side panel 68. Two sides (surfaces) at both ends in the vehicle height direction (arrow C direction) of the casing 16 are constituted by an upper side panel 70 and a lower side panel 72.

  The front side panel 66 and the rear side panel 68 are formed by, for example, extrusion molding, casting, machining, or the like. The front side panel 66 has a horizontally long plate shape arranged in the vertical direction, and has inner bulging portions 66 a and 66 b that bulge inward of the casing 16. The inner bulging portions 66 a and 66 b have a function of transmitting a load from the outside (a load from the front) to the upper side panel 70 and the lower side panel 72. The upper side panel 70 and the lower side panel 72 have a function of protecting the fuel cell stack 10 against loads from above and below.

  The rear side panel 68 has a horizontally long plate shape arranged in the vertical direction, and is formed with inner bulging portions 68 a and 68 b bulging inward of the casing 16. In addition, you may comprise the front side panel 66 and the back side panel 68 by a flat plate member arrange | positioned between a pair of press plates similarly to the upper side panel 70 mentioned later.

  As shown in FIGS. 5 and 6, the upper side panel 70 includes an outer plate 74 and an inner plate 76 that are a pair of press plates (press-formed plates) that are joined to each other. The outer plate 74 and the inner plate 76 are formed of metal thin plates whose surfaces are press-molded in an uneven shape. Flat plate members 78a and 78b are interposed between the outer plate 74 and the inner plate 76 corresponding to both ends of the plate (both ends in the direction of arrow A) extending along the stacking direction (arrow B direction).

  The outer plate 74 constitutes the upper surface of the casing 16 and has a thin plate shape. On the surface of the outer plate 74, rib portions 80a and 80b are provided with the diagonal position interposed therebetween (or connecting the diagonal position and the opposite side position). The surface positions of the rib portions 80a and 80b are different from the other surface positions of the outer plate 74 in the thickness direction, that is, set to a position that is higher in the height direction (position that bulges upward).

  The inner plate 76 constitutes the inner peripheral surface of the casing 16, has a thin plate shape, and has a curved shape, a bent shape, or both shapes along the outer peripheral shape of the fuel cell 14. For example, the inner plate 76 is provided with curved portions 76 a and 76 b at both edge portions in the direction of arrow A along the curved shape of the corner portion of the fuel cell 14. A deformed portion 76 c that is curved (or bent) upward along the outer peripheral shape of the fuel cell stack 10, for example, along the connection bar 28, is provided on the center side in the arrow A direction of the inner plate 76.

  The flat plate members 78 a and 78 b have a substantially rectangular bar shape elongated in the direction of arrow B, and are formed thicker than the outer plate 74 and the inner plate 76. As shown in FIG. 5, it is preferable that the thickness ta of the flat plate members 78a and 78b is set to be approximately the same as the thickness tb of the inner bulged portions 66a and 68a.

  The flat plate members 78a and 78b are fixed to the outer plate 74 and the inner plate 76 by MIG welding or TIG welding (or spot welding, brazing, friction stir welding, or the like). At both ends of the outer plate 74 and the inner plate 76 in the direction of arrow A, for example, two line-shaped welding parts WP1 extending in the direction of arrow B are provided. The flat plate members 78a and 78b are each provided with two line-shaped welding parts WP2 corresponding to the welding parts WP1. The welding parts WP1 and WP2 are joined.

  Similarly, the outer plate 74 and the inner plate 76 are fixed by MIG welding, TIG welding, or the like. The outer plate 74 is provided with two rectangular welded portions WP3 that face each other along the arrow B direction. The inner plate 76 is provided with two rectangular welded portions WP4 that face each other along the arrow B direction. The welding parts WP3 and WP4 are joined. Bolt insertion holes 82 are formed at desired positions in the outer plate 74, the inner plate 76, and the flat plate members 78a and 78b.

  The lower side panel 72 constitutes the mount structure 18 and includes an outer plate 84 and an inner plate 86 which are a pair of press plates (plate forming plates) joined to each other as shown in FIGS. 5 and 7. The outer plate 84 and the inner plate 86 are composed of thin metal plates whose surfaces are press-formed in an uneven shape. Between the outer plate 84 and the inner plate 86, the first plate member 88a and the second plate member 88b correspond to plate both ends (both ends in the arrow A direction) extending along the stacking direction (arrow B direction). Is installed.

  As shown in FIG. 5, the thickness tc of the first plate member 88a and the second plate member 88b may be set to a width dimension (thickness) larger than the thickness tb of the inner bulging portions 66b and 68b. preferable. The outer plate 84 and the inner plate 86 are configured similarly to the outer plate 74 and the inner plate 76 described above.

  The outer plate 84 forms the lower surface of the casing 16 and has a thin plate shape. On the surface of the outer plate 84, rib portions 90 a and 90 b are provided connecting diagonal positions (or connecting diagonal positions and opposite side positions). The surface positions of the rib portions 90a and 90b are set to positions that are lower in the height direction than the other surface positions of the outer plate 84 (positions that bulge downward).

  The inner plate 86 constitutes the inner peripheral surface of the casing 16 and has a thin plate shape, and has a curved shape, a bent shape, or both shapes along the outer peripheral shape of the fuel cell 14. For example, the inner plate 86 is provided with curved portions 86 a and 86 b at both edge portions in the direction of arrow A along the curved shape of the corner portion of the fuel cell 14. A deforming portion 86c that curves (or bends) downward along the outer peripheral shape of the fuel cell stack 10, for example, along the connecting bar 28, is provided on the center side of the inner plate 86 in the arrow A direction.

  As shown in FIG. 7, the first plate member 88 a and the second plate member 88 b extend in the arrow B direction and are formed thicker than the outer plate 84 and the inner plate 86. The 1st board member 88a arrange | positioned at a vehicle length direction front (arrow Af direction) has a substantially flat plate shape, and provides a pair of 1st fastening part 92 in the both-ends edge part of a length direction.

  The first fastening portion 92 is provided with three (or two or four) attachment boss portions 92a. A screw hole 94 is formed in each mounting boss portion 92a (see FIG. 8). The length of the female screw portion can be set large by the mounting boss portion 92a. The attachment boss portion 92a may be integrated with the first plate member 88a, or another part may be joined. In place of the screw hole 94, for example, a stud bolt may be provided.

  The 2nd board member 88b arrange | positioned at a vehicle length direction back (arrow Ab direction) has a substantially flat plate shape, and provides a pair of 2nd fastening part 98 in the both-ends edge part of a length direction. The second fastening portion 98 has three (or two or four) attachment boss portions 98a. A screw hole 102 is formed in each mounting boss portion 98a. The length of the female screw portion can be set large by the mounting boss portion 98a. The attachment boss portion 98a may be integrated with the second plate member 88b, or another part may be joined.

  The outer plate 84 is formed with a pair of openings (or holes) 106a and 106b for inserting the mounting bosses 92a and 98a at both ends in the direction of arrow A, respectively.

  The first plate member 88a and the second plate member 88b are fixed to the outer plate 84 and the inner plate 86 by MIG welding or TIG welding (or spot welding, brazing, friction stir welding, or the like). At both ends of the outer plate 84 and the inner plate 86 in the direction of arrow A, for example, two line-shaped welding parts WP5 extending in the direction of arrow B are provided, while the first plate member 88a and the second plate member member 88b is provided with two line-shaped welded parts WP6 corresponding to the welded parts WP5. The welding parts WP5 and WP6 are joined.

  The outer plate 84 and the inner plate 86 are similarly fixed by MIG welding, TIG welding, or the like. The outer plate 84 is provided with two rectangular welded portions WP7 that face each other along the arrow B direction. The inner plate 86 is provided with two rectangular welded portions WP8 that face each other along the arrow B direction. The welding parts WP7 and WP8 are joined. The outer plate 84, the inner plate 86, the first plate member 88a, and the second plate member member 88b are formed with bolt insertion holes 82 at desired positions.

  As shown in FIG. 2, the mount structure 18 includes a substantially rectangular frame 110. In the frame 110, four leg portions 112 each having a predetermined length are fixed to the vehicle body frame 12 </ b> S of the fuel cell electric vehicle 12. The frame 110 is provided with attachment portions 124 at both end positions in the front in the vehicle length direction (arrow Af direction) and both end positions in the rear in the vehicle length direction (arrow Ab direction).

  As shown in FIGS. 9 and 10, the attachment portion 124 includes two plates 126 and 128 that are screwed onto the frame 110. The plate 126 has a substantially U-shaped cross section, and is embedded in an elastic body, for example, a rubber member 130, and is provided with a female screw member 132. The plate 128 is disposed in a gate shape so as to cover the top of the plate 126. An elastic body, for example, a rubber member 134 is provided on the inner surface of the plate 128.

  A hole 136 is formed in the upper part of the plate 128 coaxially with the female screw of the female screw member 132. A screw 138 is inserted from the hole 136, and the connecting member 140 is attached to the attachment portion 124 via the screw 138. The connecting member 140 has one end 140 a disposed between the plates 126 and 128, a screw 138 is inserted into a hole 142 formed in the one end 140 a, and the screw 138 is screwed into the female screw member 132. The one end 140a is held by the elasticity of the rubber members 130 and 134, and the upper surface of the one end 140a is in contact with the lower surface of the rubber member 134 without a gap.

  In the other end portion 140b of the connecting member 140, for example, three (number is appropriately set) hole portions 144 are formed. A screw 146 is inserted into each hole 144. Each screw 146 is screwed into the screw hole 94 of each mounting boss portion 92a and the screw hole 102 of each mounting boss portion 98a. The connecting member 140 has a bent portion 140c between the one end portion 140a and the other end portion 140b.

  As shown in FIGS. 2 and 3, the upper side panel 70 is fixed to the upper portions of the front side panel 66 and the rear side panel 68 via screws 148. The lower side panel 72 is fixed to the lower portions of the front side panel 66, the rear side panel 68, the first end plate 24a, and the second end plate 24b via screws 148. The upper side panel 70, the lower side panel 72, the front side panel 66, and the rear side panel 68 are fixed to the first end plate 24a and the second end plate 24b via screws 148.

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

  First, as shown in FIG. 2, an oxidant gas such as an oxygen-containing gas is supplied from the oxidant gas supply manifold 60a of the first end plate 24a to the oxidant gas supply communication hole 38a. A fuel gas such as a hydrogen-containing gas is supplied from the fuel gas supply manifold 62a of the first end plate 24a to the fuel gas supply communication hole 40a. Further, as shown in FIG. 1, in the second end plate 24b, a cooling medium such as pure water, ethylene glycol, or oil is supplied from the cooling medium supply manifold 64a to the pair of cooling medium supply communication holes 42a.

  Therefore, as shown in FIG. 4, the oxidant gas is introduced into the oxidant gas flow path 50 of the cathode-side separator 34 from the oxidant gas supply communication hole 38a. The oxidant gas moves in the direction of arrow A along the oxidant gas flow path 50 and is supplied to the cathode electrode 46 of the electrolyte membrane / electrode structure 32.

  On the other hand, the fuel gas is supplied to the fuel gas flow path 52 of the anode separator 36 from the fuel gas supply communication hole 40a. The fuel gas moves in the direction of arrow A along the fuel gas passage 52 and is supplied to the anode electrode 48 of the electrolyte membrane / electrode structure 32.

  Therefore, in the electrolyte membrane / electrode structure 32, the oxidizing gas supplied to the cathode electrode 46 and the fuel gas supplied to the anode electrode 48 are consumed by an electrochemical reaction in the electrode catalyst layer to generate power. Is called.

  Next, the oxidant gas consumed by being supplied to the cathode electrode 46 of the electrolyte membrane / electrode structure 32 is discharged in the direction of arrow B along the oxidant gas discharge communication hole 38b. On the other hand, the fuel gas supplied to and consumed by the anode electrode 48 of the electrolyte membrane / electrode structure 32 is discharged in the direction of arrow B along the fuel gas discharge communication hole 40b.

  The cooling medium supplied to the pair of cooling medium supply communication holes 42 a is introduced into the cooling medium flow path 54 between the cathode side separator 34 and the anode side separator 36. The cooling medium once flows in the direction of arrow C and then moves in the direction of arrow A to cool the electrolyte membrane / electrode structure 32. The cooling medium moves outward in the direction of arrow C, and is then discharged in the direction of arrow B along the pair of cooling medium discharge communication holes 42b.

  In this case, in the first embodiment, the mount structure 18 includes a lower side panel 72 that constitutes the casing 16. The lower side panel 72 includes an outer plate 84 and an inner plate 86 disposed between the first end plate 24a and the second end plate 24b, and a first interposed between the outer plate 84 and the inner plate 86. A plate member 88a and a second plate member 88b are provided.

  The first plate member 88a is provided with a pair of first fastening portions 92 for fixing the fuel cell stack 10 to the vehicle body frame 12S. On the other hand, the second plate member 88b is provided with a pair of second fastening portions 98 for fixing the fuel cell stack 10 to the vehicle body frame 12S.

  For this reason, the mount structure 18 is disposed below the fuel cell stack 10 and does not protrude greatly outward in the horizontal direction of the fuel cell stack 10. Accordingly, the entire mount structure 18 is made compact, the configuration is easily simplified, and the fuel cell stack 10 can be reliably installed at a desired installation site (for example, the vehicle body frame 12S). can get.

  Further, as shown in FIGS. 9 and 10, the mount structure 18 is attached to the attachment portion 124 provided with rubber members 130 and 134 and the attachment portion 124 in order to fix the lower side panel 72 to the frame 110. And a connecting member 140. As a result, the entire fuel cell stack 10 is held elastically with respect to the frame 110 and further with respect to the vehicle body frame 12S, thereby improving vibration proofing and impact resistance.

  Further, the first plate member 88a is provided with a first fastening portion 92 that is two fastening portions, and the second plate member 88b is provided with a second fastening portion 98 that is two fastening portions. . For this reason, the fuel cell stack 10 is favorably held with respect to the frame 110.

  FIG. 11 is a schematic perspective explanatory view of a fuel cell stack 150 according to the second embodiment of the present invention. The same components as those of the fuel cell stack 10 according to the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  The mounting structures 152 constituting the fuel cell stack 150 are provided with attachment portions 164 at both front end positions in the vehicle length direction and both rear end positions in the vehicle length direction of the frame 110. The mounting portion 164 includes a plate 166 fixed on the frame 110. The plate 166 is bent upward, and two screws 146 are inserted on the tip side.

  As shown in FIG. 12, the pair of first fastening portions 92 provided on the first plate member 88a has two mounting boss portions 92a, while the pair of second fastening portions 98 provided on the second plate member 88b includes There are two mounting boss portions 98a. As shown in FIGS. 12 and 13, the screw 146 is screwed into the screw hole 94 of each mounting boss portion 92 a and the screw hole 102 of each mounting boss portion 98 a to fix the casing 16 to the frame 110.

  In the second embodiment configured as described above, the structure of the mount structure 152 is further simplified, and the effect that the mount structure 152 can be made compact and space-saving can be obtained.

  FIG. 14 is a schematic perspective explanatory view of a fuel cell stack 170 according to the third embodiment of the present invention.

  The mounting structure 172 constituting the fuel cell stack 170 is provided with attachment portions 124 at approximately the center position in the front of the frame 110 in the vehicle length direction and at both end positions in the rear of the vehicle length direction. As shown in FIG. 15, the 1st fastening part 92 is provided in the approximate center vicinity of the length direction of the 1st board member 88a. The outer plate 84 is formed with three holes 174 for inserting the mounting bosses 92a.

  In the third embodiment configured as described above, since there are three mounting locations, the mounting structure 172 is further simplified, and the same effects as those of the first and second embodiments described above can be obtained. .

DESCRIPTION OF SYMBOLS 10, 150, 170 ... Fuel cell stack 12 ... Fuel cell electric vehicle 12f ... Front box 14 ... Fuel cell 16 ... Casing 18, 152, 172 ... Mount structure 24a, 24b ... End plate 28 ... Connection bar 32 ... Electrolyte membrane * electrode Structure 34 ... Cathode side separator 36 ... Anode side separator 38a ... Oxidant gas supply communication hole 38b ... Oxidant gas discharge communication hole 40a ... Fuel gas supply communication hole 40b ... Fuel gas discharge communication hole 42a ... Cooling medium supply communication hole 42b ... Cooling medium discharge communication hole 44 ... Solid polymer electrolyte membrane 46 ... Cathode electrode 48 ... Anode electrode 50 ... Oxidant gas channel 52 ... Fuel gas channel 54 ... Cooling medium channel 66 ... Front side panels 66a, 66b, 68a 68b ... inner bulging portion 68 ... rear side panel 70 ... upper side panel 7 ... lower side panels 74, 84 ... outer plates 76, 86 ... inner plates 76a, 76b, 86a, 86b ... curved portions 76c, 86c ... deformed portions 78a, 78b, 88a, 88b ... flat plate members 80a, 80b, 90a, 90b ... Ribs 92, 98 ... Fastening portions 92a, 98a ... Mounting boss portions 110 ... Frame 112 ... Leg portions 124, 164 ... Mounting portions 126, 128, 166 ... Plates 130, 134 ... Rubber members 132 ... Female screw members 138, 146, 148 ... Screw 140 ... Connecting member

Claims (5)

A fuel cell stack comprising a fuel cell that generates electricity by an electrochemical reaction between a fuel gas and an oxidant gas, wherein a plurality of the fuel cells are stacked, and end plates are disposed at both ends in the stacking direction,
A mounting structure for mounting the fuel cell stack on an installation site;
The mount structure includes two stacked plates provided between the bottoms of the pair of end plates;
A plate member interposed between the two plates;
With
The plate member is provided with a fastening portion for fixing the fuel cell stack to the installation site. The fuel cell stack according to claim 1, wherein the end plate has a rectangular shape,
The plate member is a first plate member disposed on one side of each end plate;
A second plate member disposed on the opposite side of the one side of each end plate;
A fuel cell stack comprising: The fuel cell stack according to claim 2, wherein the first plate member is provided with one or two fastening portions,
The fuel cell stack, wherein the second plate member is provided with two fastening portions.   The fuel cell stack according to any one of claims 1 to 3, wherein the fastening portion is fixed to the installation site via a connecting member having an elastic body.   The fuel cell stack according to any one of claims 1 to 4, wherein the installation site is a vehicle-side frame that constitutes a fuel cell-equipped vehicle.

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