US 2025/0167306 A1Published application

Nonaqueous electrolyte secondary battery

AssigneePanasonic Energy Co., Ltd.

InventorsRyoma MISAWA, Kei KOBAYASHI, Fumikazu MIZUKOSHI

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Abstract

According to the present invention, a cylindrical battery comprises: an electrode assembly in which a long positive electrode and a long negative electrode are wound with a separator therebetween. The positive electrode has a positive electrode core exposed section exposed so that both surfaces of a positive electrode core body overlap each other. In a first surface of the positive electrode, a positive electrode lead is joined to the positive electrode core exposed section, and a first insulating tape is adhered to the positive electrode core exposed section so as to cover the positive electrode lead. In a second surface on the opposite side to the first surface of the positive electrode, a second insulating tape is adhered to the positive electrode core body exposed section. The thickness of the first insulating tape is greater than the thickness of the second insulating tape.

Claims4

Dependent claims

A non-aqueous electrolyte secondary battery, comprising

an electrode assembly in which a first electrode including a long strip-shaped first electrode core and first electrode mixture layers provided on both surfaces of the first electrode core and a second electrode including a long strip-shaped second electrode core and second electrode mixture layers provided on both surfaces of the second electrode core are wound via a separator, wherein the first electrode has a first electrode core exposed portion that both surfaces of the first electrode core are exposed from,
on a first surface of the first electrode, a first electrode lead is joined to the first electrode core exposed portion and a first insulating tape is pasted on the first electrode core exposed portion so as to cover the first electrode lead,
on a second surface on an opposite side to the first surface of the first electrode, a second insulating tape is pasted on the first electrode core exposed portion, and
a thickness of the first insulating tape is larger than a thickness of the second insulating tape.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 18/729,011Filed 23 Jan 2023
Priority: JP 2022-01156128 Jan 2022
Published: 22 May 2025
Term ends: Not estimatedThe source records don’t support an estimate.

Classification12 codes

H01M 10/0525
Li-accumulators: rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
H01M 10/0587
Construction or manufacture: of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes…
H01M 10/0431
Construction or manufacture in general: cells with wound or folded electrodes
H01M 50/536
Electrode connections inside a battery casing: characterised by the method of fixing the leads to the electrodes, e.g. by welding

Family

No related US applications are recorded in the indexed filing history.

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