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US 10,096,864 B2Granted
Non-aqueous electrolyte secondary battery
AssigneeSanyo Electric Co., Ltd.
InventorsKeisuke Minami, Toyoki Fujihara, Toshiyuki Nohma
Life of this patent
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Abstract
A nonaqueous electrolyte secondary battery includes a pressure-sensitive current interrupt mechanism, and a flat wound electrode body that is inserted in an outer casing with a winding axis of the flat wound electrode body arranged to extend in a horizontal direction. A positive electrode plate, a negative electrode plate, and a separator in a winding end portion of the flat wound electrode body are all directed toward a top side.
Claims12
A nonaqueous electrolyte secondary battery comprising:
- a positive electrode plate including a positive electrode mixture layer formed on a positive electrode core;
- a negative electrode plate including a negative electrode mixture layer formed on a negative electrode core;
- a flat wound electrode body in which the positive electrode plate and the negative electrode plate are wound into a flat roll shape in a state insulated from each other with a separator interposed between the positive electrode plate and the negative electrode plate;
- a nonaqueous electrolyte;
- and
- an outer casing that has an opening and a sealing member to seal the opening,
- wherein a positive electrode core exposed portion is formed in a form of wound multilayers in one end portion of the flat wound electrode body,
- a negative electrode core exposed portion is formed in a form of wound multilayers in the other end portion of the flat wound electrode body,
- the wound multilayers of the positive electrode core exposed portion are bundled and connected to a positive electrode current collector,
- the wound multilayers of the negative electrode core exposed portion are bundled and connected to a negative electrode current collector,
- the nonaqueous electrolyte secondary battery includes a pressure-sensitive current interrupt mechanism electrically connected to at least one of the positive electrode current collector and the negative electrode current collector,
- the pressure-sensitive current interrupt mechanism is located closer to the opening than the flat wound electrode body,
- the positive electrode mixture layer contains lithium carbonate,
- the flat wound electrode body is inserted in the outer casing with a winding axis of the flat wound electrode body arranged to extend in a horizontal direction, and
- a winding end edge of the positive electrode plate, a winding end edge of the negative electrode plate, and a winding end edge of the separator are all directed toward the sealing member.
12 more elements
A nonaqueous electrolyte secondary battery comprising:
- a positive electrode plate including a positive electrode mixture layer formed on a positive electrode core;
- a negative electrode plate including a negative electrode mixture layer formed on a negative electrode core;
- a flat wound electrode body in which the positive electrode plate and the negative electrode plate are wound into a flat roll shape in a state insulated from each other with a separator interposed between the positive electrode plate and the negative electrode plate;
- a nonaqueous electrolyte;
- and
- an outer casing that has an opening and a sealing member to seal the opening,
- wherein a positive electrode core exposed portion is formed in a form of wound multilayers in one end portion of the flat wound electrode body,
- a negative electrode core exposed portion is formed in a form of wound multilayers in the other end portion of the flat wound electrode body,
- the wound multilayers of the positive electrode core exposed portion are bundled and connected to a positive electrode current collector,
- the wound multilayers of the negative electrode core exposed portion are bundled and connected to a negative electrode current collector,
- the nonaqueous electrolyte secondary battery includes a pressure-sensitive forced short-circuiting mechanism,
- the pressure-sensitive forced short-circuiting mechanism is located closer to the opening than the flat wound electrode body,
- the positive electrode mixture layer contains lithium carbonate,
- the flat wound electrode body is inserted in the outer casing with a winding axis of the flat wound electrode body arranged to extend in a horizontal direction, and
- a winding end edge of the positive electrode plate, a winding end edge of the negative electrode plate, and a winding end edge of the separator are all directed toward the sealing member.
12 more elements
Dependencies are inferred from the claim text.