US 2024/0204371 A1 · CYLINDRICAL BATTERY CELL, BATTERY AND METHOD FOR FORMING CYLINDRICAL BATTERY CELL

Abstract

A cylindrical battery cell, a battery and a method for forming cylindrical battery cell are provided. In the cylindrical cell, an opening is created on a bottom side of the cell housing and a copper plate is forged with the cell housing to form a bi-metal plate on the bottom side of the cell housing, and the copper plate is welded with the jellyroll structure. Therefore, joining/welding the cell housing with the jellyroll structure is achieved by using a laser from outside of the cell housing, while risk of corrosion of cell housing is not introduced.

Claims20

Dependent claims

A cylindrical battery cell, at least comprising a cell housing and a jellyroll structure which is arranged inside the cell housing,

wherein an opening is created on a bottom side of the cell housing and a copper plate is forged with the cell housing to form a bi-metal plate on the bottom side of the cell housing, and the copper plate is welded with the jellyroll structure.

Dependencies are inferred from the claim text.

Facts

Application

18/287,179Filed 28 Jun 2021

Published

20 Jun 2024

Term ends

Not estimatedThe source records don’t support an estimate.

Classification18 codes

H01M 50/536
Electrode connections inside a battery casing: characterised by the method of fixing the leads to the electrodes, e.g. by welding
H01M 10/0422
Construction or manufacture in general: cells or battery with cylindrical casing
H01M 10/0431
Construction or manufacture in general: cells with wound or folded electrodes
H01M 50/107
Characterised by their shape or physical structure: having curved cross-section, e.g. round or elliptic

Cylindrical battery cell, battery and method for forming cylindrical battery cell

Life of this patent

Cylindrical battery cell, battery and method for forming cylindrical battery cell

Life of this patent

Abstract

Claims20