Metal shell button type lithium ion battery
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHONGQING VDL ELECTRONICS
- Publication Date
- 2020-09-18
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Abstract
Description
technical field
[0001] The invention relates to the field of lithium batteries, in particular to a metal shell button lithium ion battery. Background technique
[0002] At present, when most battery manufacturers make thin metal shell lithium secondary batteries, the outer shell of the battery cell adopts a circular metal shell, and its structure is divided into three layers: an inner shell, an outer shell, and a sealing ring. Therefore, in the prior art Lithium-ion batteries occupy a lot of space in the radial direction, resulting in that the battery product cannot make full use of the space in the radial direction, so there is a technical problem of low energy density of the battery. The seal between the inner shell and the outer shell adopts an R angle Sealing technology, which relies on compressed plastic sealing rings to achieve sealing. However, the existing technical means are not very accurate in measuring the R angle, so the good sealing between the inner shell and...