Battery cell structure and battery with battery cell structure

A cell and battery technology, which is applied in the field of batteries and lithium batteries, can solve problems such as low production efficiency, cell deformation, and low yield, and achieve the effects of uniform tension control, large effective width, and high production efficiency

Pending Publication Date: 2018-03-30
CHINA AVIATION LITHIUM BATTERY RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are the following problems in its structural form: 1. The laminated structure cell needs to be cut into sections of the positive electrode, negative electrode, and diaphragm during production, and then stacked, and the production efficiency is low; 2. The winding cell The production efficiency of the structure is high, but the tension of the pole piece and the diaphragm is difficult to control, which will easily lead to deformation of the battery cell and low yield

Method used

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  • Battery cell structure and battery with battery cell structure
  • Battery cell structure and battery with battery cell structure
  • Battery cell structure and battery with battery cell structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Such as figure 1 As shown, a cell structure of the present invention includes a positive electrode sheet 1, a negative electrode sheet 2 and a separator 3. The positive electrode sheet 1 has a discontinuous structure, the corresponding negative electrode sheet 2 has a continuous structure, and the positive electrode sheet 1 has a discontinuous structure. The two sides are respectively compounded with the separator 3 into one body, and then wound with the corresponding continuous structure of the negative electrode sheet 2 to form a battery core, forming a structure in which the positive electrode sheet 1 and the negative electrode sheet 2 and the separator 3 are alternately stacked, and the positive electrode of the discontinuous structure The different segments of the sheet 1 are located in different layers of the cell. The positive electrode sheet 1 with a non-continuous structure is formed by a plurality of pole pieces separated by a certain distance, and the separator...

Embodiment 2

[0024] Such as figure 2 As shown, the difference between this embodiment and the first embodiment is that the negative electrode sheet 2 is a discontinuous structure, and the corresponding positive electrode sheet 1 is a continuous structure. When making, first, both sides of the negative electrode sheet 2 of the non-continuous structure are combined with the separator 3 as a whole, and then It is then wound together with the positive electrode sheet 1 of the continuous structure to form a battery cell. In the discontinuous structure, the distance between adjacent negative electrode sheets 2 gradually increases from the beginning of the winding to the end of the winding, which can make the tension control of the separator 3 and the pole pieces more uniform.

[0025] A battery includes the cell structure described in the first embodiment or the second embodiment.

[0026] Such as image 3 with Figure 4 As shown, the positive electrode sheet 1 is used as a discontinuous structure ...

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Abstract

The invention provides a battery cell structure and a battery with the battery cell structure. The battery cell structure comprises positive plates, negative plates and diaphragms, wherein the positive plates or the negative plates are of a discontinuous structure, the corresponding negative plates or the positive plates are of a continuous structure, the two sides of the positive plates or the negative plates of the discontinuous structure are respectively and integrally compounded with the diaphragms, the positive plates or the negative plates of the discontinuous structure are wound with the corresponding negative plates or the positive plates of the continuous structure into a battery cell after being compounded, a structure that the positive plates, the negative plates and the diaphragms are alternatively stacked is formed, and different sections of the positive plates or the negative plates of the discontinuous structure are arranged in different layers of the battery cell. The positive plates or the negative plates of the discontinuous structure are formed by a plurality of sections of pole pieces which are arranged at intervals in certain distance, and the diaphragms are ofa continuous structure. According to the battery cell structure, one pole piece is of the continuous structure, and another pole piece is of the discontinuous structure; thus, a winding manufacturingtechnology can be utilized, and the characteristics of high production efficiency and even tension are achieved.

Description

Technical field [0001] The present invention relates to the technical field of lithium batteries, in particular to a cell structure and a battery using the cell structure. Background technique [0002] Lithium-ion battery is a battery with high energy density and good environmental performance. It has the advantages of high energy, high reliability and good processability, so it is widely used in various portable electronic devices. [0003] The cell in a lithium-ion battery generally includes a positive electrode sheet, a separator, and a negative electrode sheet that are superimposed or wound on each other. The separator is spaced between the adjacent positive and negative sheets to insulate and isolate the positive and negative sheets and retain the electrolyte. The structural form has the following problems: 1. The laminated structure battery cell, because during production, it is necessary to cut the positive electrode sheet, the negative electrode sheet and the separator into...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): H01M10/0525H01M10/058
CPCH01M10/0525H01M10/058Y02E60/10Y02P70/50
Inventor殷久山于申军黄兴龙冯小平
OwnerCHINA AVIATION LITHIUM BATTERY RES INST CO LTD