Method for manufacturing electricity storage device and electricity storage device
AssigneePrime Planet Energy & Solutions, Inc.
InventorSatoshi MIKI
Life of this patent
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Abstract
A method for manufacturing an electricity storage device includes a case body preparing step, a closing plate preparing step, and a welding step. The closing plate prepared in the step of preparing the closing plate includes: a closing portion that covers the opening of the case body, while overlapping an edge of the opening; and an insertion portion inserted into the opening along an inner side of the case body with the closing plate closing the opening. In the step of laser-welding the case body and the closing plate, an area located on the closing portion side relative to a boundary between the edge of the opening and the closing portion is irradiated with laser light, thereby welding the edge of the opening and the closing portion at their boundary.
Claims7
A method for manufacturing an electricity storage device, comprising the steps of:
- preparing a case body having an opening on at least one side thereof;
- preparing a closing plate for closing the opening;
- and
- laser-welding the case body and the closing plate with the closing plate mounted on the case body so as to close the opening, wherein
- the closing plate prepared in the step of preparing the closing plate comprises:
- a closing portion that covers the opening, while overlapping an edge of the opening;
- and
- an insertion portion inserted into the opening along an inner side of the case body with the closing plate closing the opening, and
- in the step of laser-welding the case body and the closing plate,
- an area located on the closing portion side relative to a boundary between the edge of the opening and the closing portion is irradiated with laser light, thereby welding the edge of the opening and the closing portion at the boundary.
An electricity storage device comprising:
- a case body having an opening on at least one side thereof;
- and
- a closing plate that closes the opening, wherein
- the closing plate comprises:
- a closing portion that covers the opening, while overlapping an edge of the opening;
- and
- an insertion portion inserted into the opening along an inner side of the case body, and
- an edge of the opening and the closing portion are welded at a boundary therebetween, and an area located on the closing portion side relative to the boundary between the edge of the opening and the closing portion has a peak of a penetration depth.
Dependencies are inferred from the claim text.