Cylindrical battery and method for manufacturing cylindrical battery
AssigneePanasonic Energy Co., Ltd.
InventorSoh ADACHI
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Abstract
This cylindrical battery includes an electrode body, an exterior can, and a sealing body swaged and fixed to the opening of the exterior can via a gasket. The exterior can has: a tip bent part bent so as to extend inward in the radial direction in an opening adjacent to the gasket; and a tip cylindrical part extending in the axial direction. The gasket has a non-continuous part that can be separated in the axial direction at an opposing part that faces the radially inner side of the tip cylindrical part.
Claims9
A cylindrical battery, comprising:
- an electrode assembly having a positive electrode and a negative electrode wound through a separator;
- a bottomed cylindrical outer housing can that houses the electrode assembly;
- and
- a sealing assembly that is crimped and fixed to an opening portion of the outer housing can through a gasket, wherein
- the outer housing can includes a tip bent portion that is bent so as to extend inward in a radial direction and a tip tubular portion extending in an axial direction in the opening portion adjacent to the gasket, and
- the gasket has a non-continuous portion that is separable in the axial direction in a facing portion that faces a radially inner side of the tip tubular portion.
A method for manufacturing a cylindrical battery, the cylindrical battery comprising an electrode assembly having a positive electrode and a negative electrode wound through a separator, a bottomed cylindrical outer housing can that houses the electrode assembly, and a sealing assembly that is crimped and fixed to an opening portion of the outer housing can through a gasket, the method comprising:
- arranging the gasket adjacent to inside of the opening portion of the outer housing can and bending a tip portion of the outer housing can greater than or equal to 90 degrees from a state of extending in an axial direction to a state of facing radially inward to form a tip bent portion and a tip tubular portion that is provided on a bottom portion side in relation to the tip bent portion and that extends in the axial direction;
- and
- compressing the gasket in the axial direction through the tip bent portion from a state where the gasket is separated in the axial direction through a gap in a facing portion facing a radially inner side of the tip tubular portion.
Dependencies are inferred from the claim text.