Secondary battery and method for manufacturing the same
AssigneeSanyo Electric Co., Ltd.
InventorsYohei Muroya, Hiroyuki Inoue
Life of this patent
Estimating the term…
Abstract
A secondary battery includes an electrode body that includes a positive-electrode sheet and a negative-electrode sheet, a prismatic exterior body that accommodates the electrode body, a metallic sealing plate that seals an opening of the prismatic exterior body, and a positive-electrode current collector that is electrically connected to the positive-electrode sheet and the sealing plate. The positive-electrode current collector includes a base that faces the sealing plate and a lead that is disposed on an end portion of the base. A projection is formed on the sealing plate. The projection is fitted in a connection opening that is formed in the base. The projection and the base are welded to each other.
Claims12
A secondary battery comprising:
- an electrode body that includes a first electrode sheet and a second electrode sheet having a polarity different from a polarity of the first electrode sheet;
- an exterior body that has an opening and that accommodates the electrode body;
- a sealing plate that seals the opening;
- and
- a current collector that is electrically connected to the first electrode sheet,
- wherein the current collector includes a base that faces the sealing plate,
- wherein a projection is formed on a surface of the sealing plate on an electrode body side,
- wherein a connection opening or a connection notch is formed in the base,
- wherein the projection is fitted in the connection opening or the connection notch, and
- wherein the projection and the base are welded to each other, and a weld nugget is formed.
A method for manufacturing a secondary battery including an electrode body that includes a first electrode sheet and a second electrode sheet having a polarity different from a polarity of the first electrode sheet, an exterior body that has an opening and that accommodates the electrode body, a sealing plate that seals the opening, and a current collector that is electrically connected to the first electrode sheet, the current collector including a base that faces the sealing plate, the method comprising:
- a step of disposing a projection that is formed on the sealing plate in a connection opening or a connection notch that is formed in the base;
- and
- a step of welding the projection and the base to each other to form a weld nugget in a manner in which the projection and the base are irradiated with energy rays.
Dependencies are inferred from the claim text.