A fuel cell stack is provided in which a plurality of single cells each including a membrane electrode assembly are stacked in a stacking direction. The fuel cell stack includes a plurality of electrical insulation members each connected to an outer peripheral portion of a corresponding one of the m
A fuel cell stack is provided in which a plurality of single cells each including a membrane electrode assembly are stacked in a stacking direction. The fuel cell stack includes a plurality of electrical insulation members each connected to an outer peripheral portion of a corresponding one of the membrane electrode assemblies. The fuel cell stack further includes a first displacement absorbing member disposed between each insulation member and an adjacent insulation member.
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1. A fuel cell stack having a plurality of single cells, each including a membrane electrode assembly, that are stacked in a stacking direction, the fuel cell stack comprising: an anode separator and a cathode separator sandwiching the membrane electrode assembly of each single cell therebetween,whe
1. A fuel cell stack having a plurality of single cells, each including a membrane electrode assembly, that are stacked in a stacking direction, the fuel cell stack comprising: an anode separator and a cathode separator sandwiching the membrane electrode assembly of each single cell therebetween,wherein the anode separator is a corrugated panel of electroconductive material forming a gas passage for supplying anode gas to the anode, on the side of the anode separator which contacts an anode, and forming a cooling water channel, on the opposite side other anode separator, through which cooling water flows, andwherein the cathode separator is a corrugated panel of electroconductive material forming a gas passage for supplying cathode gas to the cathode, on the side of the cathode separator which contacts a cathode, and forming a cooling water channel, on the opposite side of the cathode separator, through which cooling water flows;a plurality of insulation members each connected to an outer peripheral portion of a corresponding one of the membrane electrode assemblies, the plurality of insulation members being electrically insulating, wherein each insulating member has a portion extending in a plane perpendicular to the stacking direction and a pair of protruding portions extending opposite to one another along the stacking direction; anda first plurality of displacement absorbing members each of which being disposed between each pair of adjacent insulation members between corresponding producing portions directly in contact with the corresponding protruding portions, wherein each displacement absorbing member is configured to deform so that insulating members can follow displacement of the fuel cell stack in the stacking direction. 2. The fuel cell stack according to claim 1, wherein the Young's modulus of each of the plurality of first displacement absorbing members is lower than the Young's modulus of the insulation members. 3. The fuel cell stack according to claim 1, wherein each of the plurality of first displacement absorbing members are bonding members bonding adjacent insulation members to each other. 4. The fuel cell stack according claim 1, wherein each of the insulation members includes a frame portion formed along an outer periphery of the membrane electrode assembly. 5. The fuel cell stack according to claim 4, wherein the thickness of the protruding portion in the stacking direction is smaller than the sum of the thickness of the membrane electrode assembly in the stacking direction and the thickness of the pair of separators in the stacking direction. 6. The fuel cell stack according to claim 4, wherein the membrane electrode assembly includes an electrolyte membrane, and wherein the frame portion defines a slot into which an outer edge of the electrolyte membrane is inserted. 7. The fuel cell stack according to claim 4, further comprising: a second plurality of displacement absorption members each disposed between the frame portion and the separators. 8. The fuel cell stack according to claim 7, wherein the Young's modulus of each of the plurality of second displacement absorbing members is lower than the Young's modulus of the insulation members. 9. The fuel cell stack according to claim 8, wherein each of the plurality of second displacement absorbing members are bonding members bonding the frame portion to the separators. 10. The fuel cell stack according to claim 1, further comprising a pair of tie rods extending in the stacking direction and sandwiching the single cells therebetween from outer sides of the insulation members. 11. A fuel cell stack having a plurality of single cells, each including a membrane electrode assembly including an electrolyte membrane, that are stacked in a stacking direction, the fuel cell comprising: an anode separator and a cathode separator sandwiching the membrane electrode assembly of each single cell therebetween,wherein the anode separator is a corrugated panel of electroconductive material forming a gas passage for supplying anode gas to the anode, on the side of the anode separator which contacts an anode, and forming a cooling water channel, on the opposite side of the anode separator, through which cooling water flows, andwherein the cathode separator is a corrugated panel of electroconductive material forming a gas passage for supplying cathode gas to the cathode, on the side of the cathode separator which contacts a cathode, and forming a cooling water channel, on the opposite side of the cathode separator, through which cooling water flows; andouter peripheral members configured and arranged to deform so as to allow displacement between the plurality of single cells along the stacking direction, each of the outer peripheral members being connected to an outer peripheral portion of a corresponding one of the plurality of membrane electrode assemblies,wherein each of the outer peripheral members includes an insulation member that is electrically insulating and a displacement absorbing member that absorbs displacement,wherein each the insulation member has a portion extending in a plane perpendicular to the stacking direction, and a pair of protruding portions extending opposite to one another along the stacking direction, andwherein the displacement absorption member is disposed between corresponding protruding portions of the insulation members of adjacent outer peripheral members directly in contact with the corresponding protruding portions. 12. The fuel cell stack according to claim 11, wherein the Young's modulus of the displacement absorption member is lower than the Young's modulus of the insulation member. 13. The fuel cell stack according to claim 11, wherein the displacement absorption member is a bonding member bonding the insulation members to each other. 14. The fuel cell stack according claim 11, wherein each of the insulation members includes a frame portion formed along an outer periphery of the membrane electrode assembly. 15. A fuel cell stack comprising: a plurality of single cells, each including a membrane electrode assembly;an anode separator and a cathode separator sandwiching the membrane electrode assembly of each single cell therebetween,wherein the anode separator is a corrugated panel of electro conductive material forming a gas passage for supplying anode gas to the anode, on the side of the anode separator which contacts the anode, and forming a cooling water channel, on the opposite side of the anode separator, through which cooling water flows, andwherein the cathode separator is a corrugated panel of electroconductive material forming a gas passage for supplying cathode gas to the cathode, on the side of the cathode separator which contacts the cathode, and forming a cooling water channel, on the opposite side of the cathode separator, through which cooling water flows; andouter peripheral members configured and arranged to deform so as to allow displacement between the plurality of single cells along stacking direction, each of the outer peripheral members being connected to an outer peripheral portion of a corresponding one of the plurality of membrane electrode assemblies,wherein each of the outer peripheral members includes an insulation member that is electrically insulating and a displacement absorbing member that absorbs displacement,wherein each insulation member has a portion extending in a plane perpendicular to the stacking direction and a pair of protruding portions extending opposite to one another along the stacking direction, andwherein the displacement absorption member is disposed between corresponding protruding portions of the insulation members of adjacent outer peripheral members directly in contact with the corresponding protruding portions.
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Neutzler Jay Kevin, Brazed bipolar plates for PEM fuel cells.
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