Fuel cell stack
AssigneeNissan Motor Co., Ltd.
InventorsYosuke Fukuyama, Keita Iritsuki
Life of this patent
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Abstract
A fuel cell stack is formed by stacking unit cells and each unit cell is formed by sandwiching a membrane electrode assembly between a pair of separators having depression parts and protrusion parts. A cooling liquid flow space is formed between the unit cells, and a displacement absorption member which absorbs displacement between the unit cells is disposed in the flow space. The displacement absorption member includes a spring function part having a free end and a fixed end, and an intrusion prevention means which prevents the free end of the spring function part from intruding into the depression part. A displacement absorption function between the unit cells is well maintained, while size reduction of the fuel cell stack is achieved.
Claims24
A fuel cell stack formed by stacking unit cells, said unit cell being formed by sandwiching a membrane electrode assembly between a pair of separators having a depression part and a protrusion part;
- wherein
- a cooling liquid flow space is formed between the unit cells,
- a displacement absorption member which absorbs displacement between the unit cells is disposed in the flow space,
- the displacement absorption member includes a spring function part having a free end and a fixed end, and
- an intrusion prevention means, which prevents the free end of the spring function part from intruding into the depression part, is provided.
Dependencies are inferred from the claim text.