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Cells and Batteries

A cell and electrical connection technology, applied in the field of electrochemistry, can solve the problem of unsolved battery safety risks

Active Publication Date: 2022-05-24
NINGDE AMPEREX TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the development of battery commercialization, the market demand for batteries is becoming stronger and stronger, but the safety risks caused by battery deformation and expansion are still unresolved

Method used

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Examples

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Embodiment Construction

[0021] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the following embodiments may be combined with each other or partially replaced in any possible manner.

[0022] In practical applications, various types of cells are usually required to meet different needs, such as chunky cells (length-to-width ratio≤1), wide cells (width≥70mm, length≥110mm) and ultra-thin cells (Thickness≤2.3mm) etc. The length direction of the battery cell refers to the direction in which the positive and negative electrode tabs of the battery cell are flush, and the width direction of the battery cell refers to the direction perpendicular to the positive and negative electrode tabs of the battery cell. However, these cells present a large degree of safety risk.

[0023] For large cells and ultra-thin cells, the lateral tension of the separator per unit area during winding is also large, and the probabilit...

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PUM

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Abstract

The invention provides an electric core and a battery, the electric core comprises a first pole piece and a second pole piece, the first pole piece comprises a first current collector and a first active material layer arranged on the first current collector; The pole piece includes a second current collector and a second active material layer disposed on the second current collector; the first current collector has a first initial section from the initial end to the first bending region, and the second current collector has a From the starting end to the second starting section of the region where the bending occurs for the first time; wherein, the surface of the first starting section facing the second starting section is not provided with the first active material layer, and the second starting section faces the first starting section The surface of the segment is not provided with a second active material layer, and the surface of the first initial segment facing away from the second initial segment is provided with a first active material layer. The object of the present invention is to provide an electric cell to at least reduce the deformation of the electric cell and the wrinkling of the single membrane sheet, and improve the electrochemical performance and safety performance of the electric cell.

Description

technical field [0001] The invention relates to the field of electrochemistry, and more particularly to a battery cell and a battery. Background technique [0002] With the development of battery commercialization, the market demand for batteries has become stronger and stronger, but the safety risks caused by battery deformation and expansion have not been resolved. SUMMARY OF THE INVENTION [0003] Aiming at the problems existing in the related art, the purpose of the present invention is to provide a battery cell, which can at least reduce the deformation of the battery cell and the wrinkling of the single film sheet, and improve the electrochemical performance and safety performance of the battery cell. [0004] In order to achieve the above purpose, the present invention provides a battery cell, including a first pole piece and a second pole piece, the first pole piece includes a first current collector and a first active electrode disposed on the first current collec...

Claims

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Application Information

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IPC IPC(8): H01M10/0587
CPCH01M10/0587H01M10/0431
Inventor 董文明
Owner NINGDE AMPEREX TECH