Lithium ion battery lamination unit, battery cell, battery cell preparing method and lithium ion battery

A lithium-ion battery and lamination technology, applied in the field of lithium-ion batteries, can solve the problems of low production efficiency, unable to meet the production needs of lithium-ion power batteries, etc., and achieve the advantages of improving production efficiency, saving production time, and improving the qualified rate of finished products. Effect

Inactive Publication Date: 2016-02-17
DO FLUORIDE NEW ENERGY TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the production efficiency of this method is extremely low and cannot meet the production needs of lithium-ion power batteries.

Method used

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  • Lithium ion battery lamination unit, battery cell, battery cell preparing method and lithium ion battery
  • Lithium ion battery lamination unit, battery cell, battery cell preparing method and lithium ion battery
  • Lithium ion battery lamination unit, battery cell, battery cell preparing method and lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The lithium-ion battery laminated unit of this embodiment is a positive electrode laminated unit or a negative electrode laminated unit;

[0038] Such as figure 1 As shown, the positive electrode stack unit is composed of a positive electrode sheet 1, a separator 3 and a negative electrode sheet 2. The two sides of the positive electrode sheet 1 are respectively bonded with a separator 3 by an adhesive, and the outer surface of the separator 3 on each side is A negative electrode sheet 2 is bonded by a binder; as figure 2 As shown, the negative electrode laminate unit is composed of a negative electrode sheet 2, a separator 3 and a positive electrode sheet 1. The two sides of the negative electrode sheet 2 are respectively bonded with a separator 3 by an adhesive, and the outer surface of the separator 3 on each side is The positive electrode sheet 2 is bonded by a binder;

[0039] The positive electrode sheet 1 is composed of aluminum foil and the positive electrode...

Embodiment 2

[0053] The lithium-ion battery laminated unit of the present embodiment is a positive pole laminated unit or a negative pole laminated unit; Diaphragm, the outer surface of the diaphragm on each side is bonded with a negative electrode sheet by an adhesive; the stacked sheet unit is composed of a negative electrode sheet, a separator and a positive electrode sheet, and the two sides of the negative electrode sheet are bonded by an adhesive There is a separator, and the outer surface of the separator on each side is bonded with a positive electrode sheet through an adhesive;

[0054] The positive electrode sheet is composed of aluminum foil and the positive electrode active material layer coated on both sides of the aluminum foil. The thickness of the positive electrode sheet is 120 μm. The negative electrode sheet is composed of copper foil and the negative electrode active material layer coated on both sides of the copper foil. The thickness of the negative electrode sheet is ...

Embodiment 3

[0068] The lithium-ion battery laminated unit of the present embodiment is a positive pole laminated unit or a negative pole laminated unit; Diaphragm, the outer surface of the diaphragm on each side is bonded with a negative electrode sheet by an adhesive; the stacked sheet unit is composed of a negative electrode sheet, a separator and a positive electrode sheet, and the two sides of the negative electrode sheet are bonded by an adhesive There is a separator, and the outer surface of the separator on each side is bonded with a positive electrode sheet through an adhesive;

[0069] The positive electrode sheet is composed of aluminum foil and the positive electrode active material layer coated on both sides of the aluminum foil. The thickness of the positive electrode sheet is 120 μm. The negative electrode sheet is composed of copper foil and the negative electrode active material layer coated on both sides of the copper foil. The thickness of the negative electrode sheet is ...

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Abstract

The invention relates to a lithium ion battery lamination unit, a battery cell, a battery cell preparing method and a lithium ion battery and belongs to the technical field of lithium ion batteries. The lithium ion battery lamination unit comprises an inner electrode slice, membranes and outer electrode slices, wherein the polarity of the inner electrode slice and the polarity of the outer electrode slices are opposite, the membranes are attached to the two side faces of the inner electrode slice respectively through a binder, and the outer electrode slices are attached to the outer side faces of the membranes through the binder. According to the lithium ion battery lamination unit, on one hand, dislocation of the membranes relative to the electrode slices can be prevented, and a short circuit between a positive plate and a negative plate can not be formed; on the other hand, during battery cell manufacturing, due to the fact that part of procedures of clamping membranes in the electrode slices are omitted, battery cell manufacturing time is shortened greatly, and the production efficiency of the lithium ion battery is improved.

Description

technical field [0001] The invention relates to a lithium-ion battery laminated unit, a battery cell and a preparation method thereof, and a lithium-ion battery, belonging to the technical field of lithium-ion batteries. Background technique [0002] Lithium-ion batteries have become the mainstream power batteries used in electric vehicles due to their high operating voltage, high energy density, long cycle life, and no memory effect. At present, my country's new energy automobile industry has ushered in a period of rapid growth, and the demand for lithium-ion power batteries has soared. However, at present, the output of lithium-ion power batteries of many enterprises cannot meet the rapidly growing demand of electric vehicles. The electrochemical performance and safety of lithium-ion batteries have a crucial impact, which leads to low production efficiency of large-capacity lithium-ion power batteries. [0003] Cell preparation is an important process in the lithium-ion ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/04H01M10/058H01M10/0525
CPCH01M10/0413H01M10/0525H01M10/058H01M2220/20Y02E60/10Y02P70/50
Inventor 许飞李小涛张向举
Owner DO FLUORIDE NEW ENERGY TECHNOLOGY CO LTD
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