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Low-deformation rolling type flexible package lithium-ion battery and production method thereof

A lithium-ion battery, wound-type technology, applied in the direction of secondary batteries, circuits, electrical components, etc., can solve the problems affecting the appearance and performance of the battery cell, large tension, battery arching deformation, etc., to achieve simple structure, Reduce the degree of deformation and ease of use

Inactive Publication Date: 2015-10-14
深圳市动力聚能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the separator paper is mainly divided into PE and PP materials. These two materials will be heated and shrunk during the subsequent baking process of the core, resulting in a large tension. The main surface of the battery will appear arched and deformed due to the shrinkage of the separator. Seriously affect the appearance flatness and performance of the battery

Method used

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  • Low-deformation rolling type flexible package lithium-ion battery and production method thereof
  • Low-deformation rolling type flexible package lithium-ion battery and production method thereof
  • Low-deformation rolling type flexible package lithium-ion battery and production method thereof

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Embodiment 1

[0034] In the embodiment of the present invention, a manufacturing method of a winding-type soft-packaged lithium-ion battery with small deformation, the specific steps are as follows:

[0035] 1) Prepare positive electrode sheet 1 and negative electrode sheet 2 according to conventional methods;

[0036] 2) Put the separator 4 on the winding needle 3, so that the positive electrode 1 and the negative electrode 2 are respectively placed between two layers of separator 4, and the separator 4 plays the role of insulation;

[0037] 3) Turn the winding needle 3, the tension device 5 releases the diaphragm 4 under the action of tension, and the diaphragm 4 is always under tension control during the rotation of the winding needle 3;

[0038] 4) After winding the needle 3 6 times, place the spacer 6 on the diaphragm 4, the thickness of the spacer 6 is 1mm;

[0039] 5) Continue to turn the coiling needle 3 to wind the gasket 6 together with the positive electrode sheet 1, the negativ...

Embodiment 2

[0043] In the embodiment of the present invention, a manufacturing method of a winding-type soft-packaged lithium-ion battery with small deformation, the specific steps are as follows:

[0044] 1) Prepare positive electrode sheet 1 and negative electrode sheet 2 according to conventional methods;

[0045] 2) Put the separator 4 on the winding needle 3, so that the positive electrode 1 and the negative electrode 2 are respectively placed between two layers of separator 4, and the separator 4 plays the role of insulation;

[0046] 3) Turn the winding needle 3, the tension device 5 releases the diaphragm 4 under the action of tension, and the diaphragm 4 is always under tension control during the rotation of the winding needle 3;

[0047] 4) After winding the needle 3 for 8 turns, place the insert 6 on the diaphragm 4, the thickness of the insert 6 is 2mm;

[0048] 5) Continue to turn the winding needle 3 to make the insert 6, the positive electrode sheet 1, the negative electro...

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Abstract

The present invention discloses a low-deformation rolling type flexible package lithium-ion battery and a production method thereof. The low-deformation rolling type flexible package lithium-ion battery comprises a positive electrode sheet, a negative electrode sheet, a rolling pin, separation membranes, a tension device, a space manufacturing device and ending glue paper, wherein the separation membrane is fixed on the tension device in a material rolling form, and the positive electrode sheet and the negative electrode sheet are respectively placed between the two layers of the separation membranes. The production method comprises: during the separation membrane rolling process, placing the space manufacturing device into a rolling core, then completing the remaining separation membrane rolling, adhering the ending glue paper, and then taking out the space manufacturing device. According to the present invention, the structure is simple, the use is easy, the production way, the process and the efficiency of the current rolling type lithium-ion battery are not changed, the space is manufactured in the rolling core by using the space manufacturing device, the tension force formed through rolling and the tension force formed through the separation membrane contraction are released, and the deformation degree of the main body surface after the battery finished product forming is reduced.

Description

technical field [0001] The invention relates to the technical field of lithium-ion battery production, in particular to a winding-type soft-pack lithium-ion battery with small deformation and a manufacturing method thereof. Background technique [0002] As the application range of lithium-ion batteries becomes wider and wider, its production scale is also increasing year by year. At present, lithium-ion batteries are divided according to the assembly form, mainly divided into laminated type and winding type. Stacked batteries can provide a high rate of discharge current, but because the production efficiency of stacked sheets is extremely low, stacked batteries are only selected in the application field of lithium-ion batteries with specific needs. At present, the vast majority of lithium-ion batteries are still wound-type batteries, ranging from small digital products such as Bluetooth headsets and mobile phones to large electric vehicles such as electric vehicles and elec...

Claims

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Application Information

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IPC IPC(8): H01M10/0525H01M10/0587
CPCH01M10/0525H01M10/0587Y02E60/10Y02P70/50
Inventor 胡成东
Owner 深圳市动力聚能科技有限公司