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Lithium-ion battery and manufacturing method

A manufacturing method and technology of lithium-ion batteries, which are applied in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, secondary batteries, etc., can solve the problems of low assembly efficiency, poor safety, and easy misalignment of electrodes, and achieve high assembly efficiency and difficult Misalignment, stable bonding effect

Pending Publication Date: 2020-07-31
DO FLUORIDE NEW ENERGY TECHNOLOGY CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Power lithium-ion batteries, electric vehicles (EV), hybrid electric vehicles (HEV), parallel hybrid electric vehicles ( PHEV) and other power batteries have attracted much attention; the assembly process of power batteries is currently mainly two types: winding type and laminated type. Due to the special needs of the market for high power and high energy of power batteries, the stacking process has gradually become the mainstream assembly of the industry. However, the current "Z"-shaped lamination process or pocket lamination process has two major problems of low assembly efficiency and poor safety due to easy electrode dislocation; therefore, it is necessary to provide a lithium battery with high assembly efficiency and low dislocation Electronic batteries and manufacturing methods are very necessary

Method used

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  • Lithium-ion battery and manufacturing method
  • Lithium-ion battery and manufacturing method

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Embodiment 1

[0032] Such as Figure 1-7 As shown, a lithium-ion battery includes a negative plate 2, a U-shaped diaphragm plate 3, and a positive plate 1. The positive plate 1 is wrapped by a U-shaped diaphragm plate 3, and the U-shaped diaphragm plate 3 and its wrapped positive plate 1 is a half-electrode unit formed by hot-pressing composite process, such as figure 1 , the negative plate 2 and the half-electrode unit are stacked in sequence to form a basic electrode unit, such as figure 2 , the basic electrode units are stacked and covered by the separator 4 to form a multi-element electrode unit, such as image 3 , the multi-element electrode unit contains at least two basic electrode units, and the multi-element electrode unit forms a battery cell, such as Figure 4 .

[0033] The surface of the base film of the U-shaped diaphragm plate 3 is also coated with a coating layer that enhances the safety of the diaphragm. The safe material components are at least one or more of Al2O3 and...

Embodiment 2

[0038] The manufacture method of lithium ion battery of the present invention, comprises the following steps:

[0039] Step 1): coating the surface of both sides of the U-shaped diaphragm plate with an adhesive coating substance, and bonding the positive plate and the U-shaped diaphragm plate;

[0040] Step 2): Apply temperature and pressure to the positive plate and U-shaped diaphragm plate while bonding, that is, hot pressing composite process, the temperature range is 50-150°C, and the applied pressure is 0-1000Kg / cm 2 , the time is 0-300s;

[0041] Step 3): the above steps form a half-electrode unit;

[0042] Step 4): Alternately stack the half-electrode units formed above and their corresponding electrodes of the opposite sex in turn, that is, the polarity of the electrode wrapped by the U-shaped diaphragm plate is opposite to that of the adjacent electrode on the outside. When the wrapped electrode unit is positive, the U-shaped diaphragm plate Both sides are negative ...

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Abstract

The invention relates to a lithium ion battery and a manufacturing method. The lithium ion battery comprises a negative plate, a U-shaped diaphragm plate and a positive plate; and the positive plate is wrapped by a U-shaped diaphragm plate, the U-shaped diaphragm plate and the positive plate wrapped by the U-shaped diaphragm plate are a half-electrode unit formed by hot-pressing composite processtreatment, the negative plate and the half-electrode units are sequentially stacked to form a basic electrode unit, the basic electrode units are stacked and coated by a diaphragm to form a multi-element electrode unit, the multi-element electrode unit at least comprises two basic electrode units, and the multi-element electrode unit forms a battery monomer. The lithium ion battery has the advantages of being high in assembly efficiency and not prone to dislocation.

Description

technical field [0001] The invention relates to the technical field of lithium electronic batteries, in particular to a lithium electronic battery and a manufacturing method. Background technique [0002] Power lithium-ion batteries, electric vehicles (EV), hybrid electric vehicles (HEV), parallel hybrid electric vehicles ( PHEV) and other power batteries have attracted much attention; the assembly process of power batteries is currently mainly two types: winding type and laminated type. Due to the special needs of the market for high power and high energy of power batteries, the stacking process has gradually become the mainstream assembly of the industry. However, the current "Z"-shaped lamination process or pocket lamination process has two major problems of low assembly efficiency and poor safety due to easy electrode dislocation; therefore, it is necessary to provide a lithium battery with high assembly efficiency and low dislocation Electronic batteries and manufactur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0525H01M10/058
CPCH01M10/0525H01M10/058Y02E60/10Y02P70/50
Inventor 王攀马红涛许飞赵永锋刘兴丹申东风许四龙杲绍芒
Owner DO FLUORIDE NEW ENERGY TECHNOLOGY CO LTD
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