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Method for winding multi-pole-piece lithium battery winding core

A lithium battery, battery roll technology, applied in the direction of secondary batteries, circuits, electrical components, etc., can solve the problems such as long distance is not conducive to welding, two roll cores are overlapped and easily dislocated, and the quality is different.

Active Publication Date: 2013-02-13
湖北宇隆新能源有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 2) The winding efficiency is slow, and two winding cores are required
[0006] 3) It is easy to dislocate when the two cores overlap, and it also increases the process
[0007] 4) After winding, two pairs of positive and negative tabs are welded in parallel respectively, and the distance is not conducive to welding
[0008] 5) Purely connect the two winding cores in parallel, if the quality of the two winding cores is different, it will affect the overall rate discharge performance
[0011] 2) This process has high requirements on the size of the pole piece, mainly the coating length of the pole piece, the length of the empty foil and the overall length of the pole piece. If the size exceeds the standard, it will cause the parallel dislocation of the two pole ears

Method used

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  • Method for winding multi-pole-piece lithium battery winding core
  • Method for winding multi-pole-piece lithium battery winding core
  • Method for winding multi-pole-piece lithium battery winding core

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Experimental program
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Effect test

Embodiment Construction

[0036] A winding method for a multi-pole sheet lithium battery winding core, comprising the following steps,

[0037] 1) Completely overlap the three diaphragms (1), and pass the overlapped diaphragm (1) through the middle gap (2.1) of the U-shaped needle (2), as figure 2 shown.

[0038] The overlapped diaphragm (1) is tightened on one side of the U-shaped coil needle (2), and folded in half by hand to tighten, as in image 3 shown.

[0039] Turn on the switch of the winding machine, and the U-shaped winding needle (2) rotates half a circle, such as Figure 4 shown.

[0040] 2) Insert the first positive electrode sheet (3) between the first layer of separator and the second layer of separator, the tab (3.1) of the first positive electrode sheet (3) is exposed, and the U-shaped needle (2) rotates half a circle; Such as Figure 5 shown.

[0041] 3) Insert the first negative electrode sheet (4) between the second layer of separator and the third layer of separator, the tab...

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Abstract

Disclosed is a method for winding a multi-pole-piece lithium battery winding core. N pairs of positive pole pieces and negative pole pieces are sequentially inserted in diaphragms in an intersected mode and wound by a U-shaped winding needle in a rotation mode to obtain the battery winding core. According to the method for winding the multi-pole-piece lithium battery winding core, the existing U-shaped winding needle is used, a plurality of the diaphragms are stacked, same pairs of the positive pole pieces and the negative pole pieces are inserted in the diaphragms in an intersected mode in steps, and a plurality of positive pole lugs and negative pole plugs which correspond to the positive pole pieces and the negative pole pieces are stacked respectively and then wound into the winding core. According to the method, procedures are not increased, working hours are saved, and the method is particularly suitable for preparing various battery winding cores with high rates.

Description

technical field [0001] The invention relates to a winding method for a multi-pole sheet lithium battery winding core, belonging to the field of lithium battery preparation. Background technique [0002] At present, the general rate-type winding batteries have the following winding methods: [0003] The first method adopts the double winding core method, which has the following disadvantages: [0004] 1) More materials are needed, and the two winding cores need to be individually wrapped, such as: diaphragms, copper and aluminum foils, and insulating tapes. [0005] 2) The winding efficiency is slow, and two winding cores are required. [0006] 3) It is easy to dislocate when the two roll cores overlap, and it also increases the process. [0007] 4) After winding, the two pairs of positive and negative tabs are welded in parallel, and the distance is not conducive to welding. Insulation tape should also be used in the middle. [0008] 5) Purely connect the two winding co...

Claims

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Application Information

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IPC IPC(8): H01M10/0587
CPCY02E60/12Y02E60/10Y02P70/50
Inventor 胡远升刘辉
Owner 湖北宇隆新能源有限公司
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