LITHIUM BATTERY WINDING NEEDLE

WIPO Patent Application WO/2022/267293

A1

Disclosed is a lithium battery winding needle. A first arc-shaped cylinder, a second arc-shaped cylinder, a third arc-shaped cylinder and a fourth arc-shaped cylinder are sequentially enclosed into a cylindrical hollow chamber structure. The first arc-shaped cylinder and the second arc-shaped cylinder are hinged to one another by means of a first hinge point. The second arc-shaped cylinder and the third arc-shaped cylinder are hinged to one another by means of a second hinge point. The third arc-shaped cylinder and the fourth arc-shaped cylinder are hinged to one another by means of a third hinge point. The fourth arc-shaped cylinder and the first arc-shaped cylinder are hinged to one another by means of a fourth hinge point. A first separator clip and second separator clip are provided in the cylindrical hollow chamber structure. The following technical effects are achieved: the lithium battery winding needle of the present invention may solve the problem in the prior art of changes in an expansion force being difficult to control when a pole piece and a separator are wound around a winding needle; the processing efficiency and quality are significantly improved; and processing costs are greatly reduced.

SI SHENGKE (CN)

PCT/CN2021/128024

December 29, 2022

November 02, 2021

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SHENZHEN TIAN HAO EQUIPMENT PTY LTD (CN)

H01M10/0587

CN113540482A	2021-10-22
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CN213042933U	2021-04-23
KR101686771B1	2016-12-14
CN110752381A	2020-02-04

BEIJING ZHIGUAGUA INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)

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