Patent ID: 9093697
Filing Date: 2015-07-28
Classification: H01M,Y02E

Abstract:
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: a pair of separators sandwiching the membrane electrode assembly therebetween; a plurality of insulation members each configured to cover an outer periphery of each of the plurality of single cells to insulate between an inside and an outside of the fuel cell stack, each of the plurality of insulation members having a protruding portion protruding from a frame portion in the stacking direction and each being connected to an outer peripheral portion of a corresponding one of the membrane electrode assemblies, the plurality of insulation members being electrically insulating; a first displacement absorbing member disposed between each insulation member and an adjacent insulation member between corresponding protruding portions and 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 stack in the stacking direction; and a pair of tie rods extending in the stacking direction and being in direct contact with outer sides of the insulation members, so as to sandwich the single cells therebetween and thus restrain the single cells from moving in a direction perpendicular to the stacking direction; wherein the membrane electrode assembly includes an electrolyte membrane; and wherein each of the insulation members includes the frame portion defining a slot into which an outer edge of the electrolyte membrane is inserted.