Nonaqueous electrolyte secondary battery
OwnerKenichiro Hosoda, Yoshihiro Dokkoinventors
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Abstract
A nonaqueous electrolyte secondary battery includes a wound electrode body structured by spirally winding electrodes with a separator in between, the electrode having a strip shape and being formed by forming a mixture layer on a current collector having a strip shape, a hollow cylindrical center pin that is inserted into a center hole of the wound electrode body, and a battery can, in which the wound electrode body having the center pin inserted therein is stored. The center pin is formed in such a way that the center pin does not crash by a force equal to 34N or less.
Claims14
A nonaqueous electrolyte secondary battery, comprising:
- a wound electrode body that is structured by spirally winding electrodes with a separator in between, said electrode having a strip shape and being formed by forming a mixture layer on a current collector having a strip shape;
- a hollow cylindrical center pin that is inserted into a center hole of said wound electrode body;
- and
- a battery can, in which said wound electrode body having said center pin inserted therein is stored;
- wherein said center pin is formed to have a strength in such a way that said center pin does not crash by a force equal to 34N or less.
A nonaqueous electrolyte secondary battery, comprising:
- a wound electrode body that is structured by spirally winding electrodes with a separator in between, said electrode having a strip shape and being formed by forming mixture layers on both sides of a current collector having a strip shape;
- and
- a battery can, in which said wound electrode body is stored;
- wherein said wound electrode body further comprises a current collector exposed portion in which said mixture layers are not formed on neither side of the surfaces of said current collector, said current collector exposed portion being provided to start at the end portion of said electrode at the outer circumference side in the winding direction and extend over a range of at least one lap from an end portion of said current collector having said mixture layers on both sides.
Dependencies are inferred from the claim text.