Energy storage device and energy storage device production method
AssigneeGS Yuasa International Ltd.
InventorsKenji Kawate, Takao Maki, Takeshi Kawahara
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Abstract
An energy storage device includes: an electrode body including curved portions formed by winding an electrode; a container in which the electrode body is accommodated; and a cover plate structure including a cover plate closing the container. The electrode body is accommodated in the container while one end portion in a winding axis direction of the electrode body faces the cover plate structure. The energy storage device includes spacers (side spacers) that are attached to curved portions, and one end portion of the spacer abuts on a part of the cover plate structure.
Claims11
An energy storage device, comprising:
- an electrode body in which an electrode is stacked;
- a container in which the electrode body is accommodated;
- a cover plate structure including a cover plate that closes the container;
- and
- a first spacer and a second spacer abutting opposing sides of the electrode body, one end portion of each of the first spacer and the second spacer abutting on a part of the cover plate structure in a first direction,
- wherein the electrode body includes a body portion and a tab projecting from one end portion of the body portion toward the cover plate,
- wherein the electrode body is disposed between the first spacer and the second spacer in a second direction that intersects with the first direction,
- wherein the first spacer includes a top plate interposed between the one end portion of the body portion and the one end portion of the first spacer in a winding axis direction of the electrode body, and
- wherein the top plate extends in the second direction toward the second spacer.
An energy storage device, comprising:
- an electrode body in which an electrode is stacked;
- a container in which the electrode body is accommodated;
- a cover plate structure including a cover plate that closes the container;
- a current collector electrically connected to the electrode body;
- and
- a first spacer and a second spacer abutting opposing sides of that abuts the electrode body, one end portion of each of the first spacer and the second spacer abutting on a part of the cover plate structure in a first direction,
- wherein the electrode body includes a body portion and a tab, the tab being electrically connected to the current collector on one end portion of the electrode body in the first direction,
- wherein the first spacer includes a top plate interposed between one end portion of the body portion and the one end portion of the first spacer in the first direction and covers a part of the one end portion of the body portion, and
- wherein the first spacer is a unitary piece that includes the top plate and a wall extending from a surface of the top plate in the first direction.
Dependencies are inferred from the claim text.