Fuel cell stack
AssigneeHonda Motor Co., Ltd.
InventorsYuta Ikeda, Naoki Inoue, Yosuke Yoshizawa, Masashi Wada
Life of this patent
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Abstract
A fuel cell stack includes a stack body formed by stacking a plurality of power generation cells. A first seal line of a first metal separator and a second seal line of a second metal separator protrude in a stacking direction of the stack body in a manner to contact a resin film. An insulator is provided with a first elastic seal member which contacts a second end seal line. The width of the first elastic seal member is larger than the maximum width of the second end seal line.
Claims11
A fuel cells stack comprising a stack body including a plurality of power generation cells stacked in a stacking direction, the power generation cells each including a membrane electrode assembly and metal separators provided on both sides of the membrane electrode assembly, the membrane electrode assembly including an electrolyte membrane and electrodes on both sides of the electrolyte membrane,
- wherein a seal bead protruding in the stacking direction of the stack body is formed in the metal separator in a manner that the seal bead contacts an outer portion of the membrane electrode assembly or a frame provided on the outer portion of the membrane electrode assembly;
- and
- insulators and end plates sandwiching the stack body in the stacking direction are provided at both ends of the stack body in the stacking direction in a manner that the seal bead is deformed elastically, and
- wherein the stack body includes end metal separators positioned at both ends in the stacking direction;
- an end seal bead protruding outward in the stacking direction is formed in each of the end metal separators;
- each of the seal beads and the end seal beads extends in a wavy pattern in a plan view viewed in the stacking direction;
- a seal member configured to contact the end seal bead is provided in an outer portion of the insulator or the end plate;
- and
- a width of the seal member is larger than a maximum width of the end seal bead.
Dependencies are inferred from the claim text.