Non-aqueous electrolyte secondary battery
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsAkira Kano, Takahiro Inoue
Life of this patent
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Abstract
Disclosed is a non-aqueous electrolyte secondary battery including: a wound electrode group 10 in which a positive electrode 11 and a negative electrode 12 are spirally wound in a winding direction with a separator 13 interposed therebetween; and a non-aqueous electrolyte. The negative electrode 12 includes a reverse winding portion 12A at an end of the wound electrode group 10 at a starting side of winding, the reverse winding portion 12A being a portion that does not oppose the positive electrode 11 and is spirally wound in a direction opposite to the winding direction.
Claims8
A non-aqueous electrolyte secondary battery comprising:
- a wound electrode group in which a positive electrode and a negative electrode are spirally wound in a winding direction with a separator interposed therebetween;
- and
- a non-aqueous electrolyte,
- wherein the negative electrode includes a reverse winding portion at an end portion of the wound electrode group at a starting side of winding, the reverse winding portion being a portion that does not oppose the positive electrode and is spirally wound in a direction opposite to the winding direction.
Dependencies are inferred from the claim text.