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Arc-shaped laminated lithium battery and lamination method thereof

A lithium battery and arc technology, which is applied in the field of arc laminated lithium batteries and their laminations, can solve the problems of difficulty in controlling the flatness of laminations, hidden dangers of battery safety, and short circuits of batteries, so as to improve stability and safety, Improved performance, improved flatness effect

Pending Publication Date: 2021-09-17
HUIZHOU HENGTAI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, there are also some shortcomings in the production of laminated cells. During the die-cutting and lamination process of pouch batteries, the burrs and dust generated are likely to cause short circuits in the batteries, causing great battery safety hazards.
Secondly, the lamination of arc-shaped cells still has the problem of complex process and difficult control of the flatness of the lamination.

Method used

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  • Arc-shaped laminated lithium battery and lamination method thereof
  • Arc-shaped laminated lithium battery and lamination method thereof
  • Arc-shaped laminated lithium battery and lamination method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0059] Make continuous arc positive electrode strips, continuous arc negative electrode strips and continuous arc diaphragm strips. The continuous arc positive electrode strips include multiple mirror-symmetrical positive electrode sheets, and the continuous arc-shaped negative electrode strips include multiple mirror-image symmetrical negative electrode strips. The continuous arc-shaped The membrane strip includes a plurality of mirror-symmetrical membranes. A hot-melt adhesive coating operation is performed on the diaphragm, and the continuous arc-shaped positive electrode strip, the continuous arc-shaped diaphragm strip with a hot-melt adhesive coating layer, and the continuous arc-shaped negative electrode strip are sequentially stacked to form a laminated core. A baking operation was performed on the laminated core body, wherein the baking temperature was 120°C. The laminated core is alternately folded, and then the folded laminated chip is placed in an aluminum-plastic s...

Embodiment 2

[0061] Make continuous arc positive electrode strips, continuous arc negative electrode strips and continuous arc diaphragm strips. The continuous arc positive electrode strips include multiple mirror-symmetrical positive electrode sheets, and the continuous arc-shaped negative electrode strips include multiple mirror-image symmetrical negative electrode strips. The continuous arc-shaped The membrane strip includes a plurality of mirror-symmetrical membranes. A hot-melt adhesive coating operation is performed on the diaphragm, and the continuous arc-shaped positive electrode strip, the continuous arc-shaped diaphragm strip with a hot-melt adhesive coating layer, and the continuous arc-shaped negative electrode strip are sequentially stacked to form a laminated core. A baking operation was performed on the laminated core body, wherein the baking temperature was 140°C. The laminated core is alternately folded, and then the folded laminated chip is placed in an aluminum-plastic s...

Embodiment 3

[0063] Make continuous arc positive electrode strips, continuous arc negative electrode strips and continuous arc diaphragm strips. The continuous arc positive electrode strips include multiple mirror-symmetrical positive electrode sheets, and the continuous arc-shaped negative electrode strips include multiple mirror-image symmetrical negative electrode strips. The continuous arc-shaped The membrane strip includes a plurality of mirror-symmetrical membranes. A hot-melt adhesive coating operation is performed on the diaphragm, and the continuous arc-shaped positive electrode strip, the continuous arc-shaped diaphragm strip with a hot-melt adhesive coating layer, and the continuous arc-shaped negative electrode strip are sequentially stacked to form a laminated core. A baking operation was performed on the laminated core body, wherein the baking temperature was 130°C. The laminated core is alternately folded, and then the folded laminated chip is placed in an aluminum-plastic s...

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Abstract

The invention provides an arc-shaped laminated lithium battery and a lamination method thereof. The lamination method of the arc-shaped laminated lithium battery comprises the following steps that a continuous arc-shaped positive electrode belt, a continuous arc-shaped negative electrode belt and a continuous arc-shaped diaphragm belt are manufactured, the continuous arc-shaped positive electrode belt comprises a plurality of positive plates in mirror symmetry, and the continuous arc-shaped negative electrode belt comprises a plurality of negative electrode belts in mirror symmetry; the continuous arc-shaped diaphragm belt comprises a plurality of diaphragms in mirror symmetry; the continuous arc-shaped positive electrode belt, the continuous arc-shaped diaphragm belt and the continuous arc-shaped negative electrode belt are sequentially laminated to form a laminated core body; alternate folding operation is carried out on the laminated core body to obtain an arc-shaped laminated cell; and the arc-shaped laminated battery cell is put into an aluminum plastic sleeve, and the hot-pressing packaging operation is carried out to obtain the arc-shaped laminated lithium battery. According to the lamination method of the arc-shaped laminated lithium battery, burrs and dust can be effectively reduced or avoided, and the lamination flatness and stability are improved.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to an arc-shaped stacked lithium battery and a stacking method thereof. Background technique [0002] Due to the advantages of high energy density, high output voltage, and high output power, lithium-ion batteries are widely used. The current lithium-ion batteries are mainly in the shape of cylinders, squares, buttons, etc., but as the application of lithium-ion batteries continues to expand to various fields, other shapes of lithium-ion batteries are also receiving more and more attention, such as those used in pedometers battery, a curved lithium-ion battery is required. In addition, non-prismatic battery cells usually use the winding method, while pouch cells usually use the lamination process. Laminated batteries have many advantages and are widely used, such as: high energy density, higher discharge platform and volume specific capacity than winding process batt...

Claims

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Application Information

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IPC IPC(8): H01M10/0583H01M10/052H01M10/0525
CPCH01M10/0583H01M10/052H01M10/0525Y02P70/50Y02E60/10
Inventor 戴建勇刘志伟李路强曾贤华
Owner HUIZHOU HENGTAI TECH
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