Patent ID: 11936068
Assignee: MURATA MANUFACTURING CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  B  Y | IPC B  H

Claim 0:
1. A battery comprising a wound electrode body including a positive electrode, a negative electrode, and a separator interposed therebetween,
wherein,
in an inner circumferential part of the wound electrode body, an insulator is configured to cover at least a partial surface of the separator or a negative electrode collector in a first space or a second space,
the negative electrode collector includes a first portion, a second portion, a third portion, fourth portion, a fifth portion, and a sixth portion that are sequentially connected from a center of the wound electrode,
the first portion is disposed in the center of the wound electrode body and has a plate-like shape having a first principle surface and a second principle surface opposite to the first principle surface,
one end of the first portion in an extending direction of the first portion has no connection,
the second portion is connected to the other end of the first portion and extends in a direction crossing the first principle surface,
the third portion is connected to the second portion and has a plate-like shape disposed facing and apart from the first principle surface of the first portion,
the fourth portion is connected to the third portion,
the fourth portion is disposed at an opposite side of the second portion and extends in the direction crossing the first principle surface,
the fifth portion is connected to the fourth portion and has a plate-like shape disposed facing and apart from the second principle surface of the first portion,
the sixth portion is connected to the fifth portion and disposed overlapping an outer side of the second portion, and
the positive electrode or a positive electrode collector is absent in the first space surrounded by the first portion, the second portion, and part of the third portion of the negative electrode collector or the negative electrode; and
in the second space surrounded by the second principle surface of the first portion, part of the third portion, the fourth portion, the fifth portion, and part of the sixth portion, and
the insulator is disposed at a surface of the third portion, the surface facing the first principle surface of the first portion, in the first space where the positive electrode or the positive electrode collector is absent.