US 11,380,964 B2Granted

Wound electrode assembly

AssigneeNingde Amperex Technology Limited

InventorsQiao Zeng, Kefei Wang, Liangzhen Xiao

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Abstract

The embodiments of the present application provides a wound electrode assembly formed by winding a first electrode sheet, a second electrode sheet, and an isolating membrane disposed therebetween. The wound electrode assembly includes: a first surface having a first protrusion in the thickness direction of the wound electrode assembly; a first wound electrode assembly; a second wound electrode assembly wrapping the first wound electrode assembly, the first wound electrode assembly and the second wound electrode assembly sharing the first electrode sheet and the second electrode sheet; an adhesive layer disposed between the first electrode sheet and the isolating membrane, and/or between the second electrode sheet and the isolating membrane. The purpose of the present application is at least to provide a wound electrode assembly capable of reducing the risk of misalignment of the internal structures of the electrode assembly during the falling, and retaining the shape of the electrode assembly.

Claims19

Dependent claims

A wound electrode assembly formed by winding a first electrode sheet, a second electrode sheet, and an isolating membrane disposed therebetween, wherein the wound electrode assembly comprises:

a first surface having a first protrusion in a thickness direction of the wound electrode assembly;
a first wound electrode assembly;
a second wound electrode assembly wrapping the first wound electrode assembly, the first wound electrode assembly and the second wound electrode assembly sharing the first electrode sheet and the second electrode sheet and having the same winding direction wherein the second wound electrode assembly is different in shape from the first wound electrode assembly in a first region, and a protective adhesive layer is disposed at least in the first region;
and
an adhesive layer disposed between a portion of the first electrode sheet constituting the first wound electrode assembly and a portion of the isolating membrane constituting a transition from the first wound electrode assembly to the second wound electrode assembly, and/or between a portion of the second electrode sheet constituting the second wound electrode assembly and the portion of the isolating membrane constituting the transition from the first wound electrode assembly to the second wound electrode assembly.

2 more elements

Dependencies are inferred from the claim text.