| CPC H01M 8/2475 (2013.01) [H01M 8/248 (2013.01); H01M 8/2485 (2013.01)] | 17 Claims |
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1. A fuel cell, comprising:
a cell stack including a plurality of unit cells stacked in a first direction of the cell stack;
an enclosure surrounding side portions of the cell stack, wherein the enclosure includes at least one opening to open at least one of first and second end portions of the cell stack;
first and second end plates respectively disposed at the first and second end portions of the cell stack;
a clamping member configured to clamp the plurality of unit cells in the first direction together with the first and second end plates; and
a coupling screw configured to couple the clamping member to a target end plate disposed at the at least one opening in the enclosure, among the first and second end plates,
wherein the target end plate includes:
a body including a first internal surface, facing the cell stack, and an external surface formed opposite to the first internal surface; and
a partition wall spaced from at least a portion of the external surface in the first direction to form a gap between the partition wall and the external surface, the partition wall being coupled to the enclosure and being made of metal,
wherein the coupling screw passes through the partition wall and couples the clamping member and the body to each other via the gap,
wherein the partition wall includes a first recess portion having a first through-hole formed therein to allow the coupling screw to pass therethrough,
wherein the first recess portion includes:
a second internal surface; and
a bottom surface having therein the first through-hole, and
wherein the coupling screw includes:
a head disposed in the first recess portion;
a first protruding portion protruding from the head toward the second internal surface in a direction intersecting the first direction,
a sealing seat surface facing the bottom surface; and
a bearing surface formed to be in contact with the clamping member in the gap.
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