Patent ID: 11936003
Assignee: PRIME PLANET ENERGY & SOLUTIONS, INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 5:
6. A battery comprising:
a wound electrode assembly, wherein
the wound electrode assembly has a flat shape,
the wound electrode assembly includes a first separator, a positive electrode plate,

a second separator, and a negative electrode plate,
the first separator, the positive electrode plate, the second separator, and the negative electrode plate are stacked in this order and then wound spirally,
in a cross section perpendicular to a winding axis of the wound electrode assembly,
the first separator has a first winding start edge inside an innermost circumference of the wound electrode assembly,
the second separator has a second winding start edge inside the innermost circumference of the wound electrode assembly,
the first winding start edge faces the second winding start edge with the winding axis interposed therebetween, and
the first winding start edge is located apart from the second winding start edge,

wherein
in the cross section perpendicular to the winding axis,
the wound electrode assembly is divided into four equal parts in a longitudinal direction, the four equal parts being a first region, a second region, a third region, and a fourth region,
in the longitudinal direction, the first region, the second region, the third region, and the fourth region are arranged in this order,
the first separator starts winding in the second region and ends winding in the third region,
the second separator starts winding in the third region and ends winding in the third region,
the positive electrode plate starts winding in the second region and ends winding in the second region, and
the negative electrode plate starts winding in the third region and ends winding in the second region.