Patent ID: 11936075
Assignee: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A stack for fuel cells, comprising a unit cell interposed between a pair of separators, wherein each of the separators has a polygonal shape and comprises:
a first surface and a second surface;
a first inlet manifold and a first outlet manifold respectively formed to penetrate through the separator along a pair of opposite sides and being spaced apart from each other by a predetermined distance; and
a second inlet manifold and a second outlet manifold respectively formed to penetrate through the separator along a remaining pair of opposite sides and being spaced apart from each other by a predetermined distance; and wherein
the first surface comprises:
a central portion recessed to a predetermined depth;
a peripheral portion surrounding the central portion; and
a first flow path recessed in the central portion, the first flow path connecting the first inlet manifold to the first outlet manifold, and
the second surface comprises:
a receiving portion recessed in a center thereof to provide a space in which a unit cell is loaded; and
a second flow path recessed in the receiving portion, the second flow path connecting the second inlet manifold to the second outlet manifold; and
wherein the stack for fuel cells further comprises:
a current collector interposed between the unit cell and each separator;
a sealant disposed to surround an outside of the unit cell; and
a metal sheet interposed between the sealant and one separator,
wherein the metal sheet is loaded in a central portion of a first surface of one separator; and
wherein the metal sheet has a same shape as the central portion of the separator, and
the metal sheet comprises, in a center thereof, a first through-hole formed along a formation direction of the first flow path of the separator, a second through-hole formed to communicate with the first inlet manifold, and a third through-hole formed to communicate with the second inlet manifold.