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Winding type battery cell and battery

A winding, cell technology, applied in non-aqueous electrolyte batteries, non-aqueous electrolyte battery electrodes, secondary batteries, etc., can solve problems such as lithium precipitation

Pending Publication Date: 2021-07-06
ZHUHAI COSMX BATTERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] A winding battery cell and battery provided by this application can alleviate the problem of lithium precipitation caused by the existing negative electrode sheet due to the existence of a single-sided paste area

Method used

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  • Winding type battery cell and battery
  • Winding type battery cell and battery
  • Winding type battery cell and battery

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Embodiment Construction

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

[0029] The terms "first", "second" and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific sequence or sequence. It should be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application can be practiced in sequences other than those illustrated or described herein, and that references to "first," "second," et...

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Abstract

The invention discloses a winding type battery cell and a battery, and belongs to the technical field of batteries. The winding type battery cell comprises a positive plate and a negative plate, the positive plate comprises a first section and a second section, and the negative plate comprises a third section; the first section and the third section are respectively wound along a first direction to form a winding structure; the outermost ring of the first section is located on the inner side of the outermost ring of the third section, and the second section is wound in the second direction from the tail end of the first section so as to wrap the outermost ring of the third section; wherein the two sides of the third section are coated with symmetrically distributed negative electrode active material layers, and the surfaces of the first section and the second section are coated with positive electrode active material layers opposite to the negative electrode active material layers respectively. According to the scheme provided by the embodiment of the invention, the problem of lithium precipitation caused by the existence of a single-sided paste region in the existing negative plate can be relieved.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a winding battery cell and battery. Background technique [0002] At present, in the manufacturing process of the winding cell structure, when coating the active material on the negative electrode sheet, the active material layers coated on both sides of the negative electrode sheet are not completely symmetrical, that is, there is only one side of the negative electrode sheet coated with active material. The position of the material layer. For example, when there is no positive electrode sheet opposite to the outermost ring of the negative electrode sheet, the outermost ring of the negative electrode sheet is set as a single-sided pasting area, that is, only the inner side of the outermost ring of the negative electrode sheet is coated Active materials, in this way, can increase the energy density of batteries. [0003] However, adopting the above-mentioned one-sided pasting...

Claims

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Application Information

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IPC IPC(8): H01M10/0587H01M10/052H01M4/13H01M50/531
CPCH01M4/13H01M10/052H01M10/0587Y02E60/10Y02P70/50
Inventor 余正发彭冲胡贤飞许延苹李俊义
Owner ZHUHAI COSMX BATTERY CO LTD
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