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Method for manufacturing soft-packing lithium ion battery in natural environment

A battery and diversion ring technology, which is applied to secondary batteries, battery pack components, circuits, etc., can solve problems such as low labor efficiency, affecting the health of operators, and inconvenient operation, and achieves an excellent effect in an anhydrous and oxygen-free environment

Inactive Publication Date: 2007-06-20
吉林省巨力电池有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 3. All items entering and exiting the glove box must pass through the intermediate tank, especially the intermediate tank for the incoming objects. It must first be vacuumized and filled with dry inert gas for many times to make the atmosphere in the tank reach the atmospheric condition of the glove box before moving the items from the intermediate tank into the glove box. glove box, very inconvenient
[0006] 4. It is very inconvenient to operate with long-arm gloves in the glove box, the accuracy is low, the labor efficiency is low, and the product repeatability is poor
[0007] 5. It affects the health of the operator, especially when the human arm is stretched into the airtight glove with the long arm. After the water discharged from the human body condenses in the glove, it will not only make people feel uncomfortable, but also easily cause dermatitis and herpes and other diseases.

Method used

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  • Method for manufacturing soft-packing lithium ion battery in natural environment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Battery blank sealing bag:

[0034] Referring to Figure 1, the battery blank envelope 1 is made of aluminum-plastic composite film, a part of which is used to form the shell of the soft-packed lithium-ion battery. Sealed battery pack. The battery blank sealing bag can also be heat-sealed around two pieces of composite film, or one piece of composite film can be folded back and then heat-sealed. For this kind of battery blank sealing bag, only three peripheries can be heat-sealed. The size of the battery blank sealing bag It is determined by the size of the battery blank 2 and the guide ring 4, but there must be a distance of more than two heat-sealing strips 6 between the battery blank 2 and the guide ring 4. Cut radial through holes 5 on a plane corresponding to the guide ring 4 battery blank envelope 1, and press the cut aluminum-plastic composite film into the inner hole of the guide ring 4 to assist the guide ring 4 in positioning. Hole cutting and positioning can...

Embodiment 2

[0036] The guide ring 4 can have multiple shapes, the simplest cylindrical ring is the best, the size is not strictly limited, preferably a short ring with a height of 2-5 mm, the inner diameter of the ring is preferably 2-10 mm, and the outer diameter Preferably 4-15mm. There are several diversion holes on the cylindrical surface of the ring, or several diversion grooves on one end surface. The function of the diversion ring is to form a fluid channel and facilitate the sealing of the positioning opening.

Embodiment 3

[0038] The process of manufacturing soft-packed lithium-ion batteries in the natural environment is:

[0039] 1. Battery blank sealing bag: see embodiment 1.

[0040] 2. Sealing the battery blank and punching holes: see Example 1.

[0041] 3. Deep drying and filling with inert gas: Put the sealed battery bag into a vacuum oven that can be evacuated and inflated, and dry it in vacuum for more than 8 hours at 80 ° C, with a vacuum degree of less than 10 Pa, and then fill it with nitrogen or argon with a purity of 0.9999 or higher. Normal pressure, then evacuated to 10pa, then filled with argon or nitrogen of the above purity to normal pressure, and lowered to room temperature. Complete a vacuum to 10pa, and then inflate to 1.01325×10 5 pa (standard air pressure), the residual gas in the battery bag will reach 10pa / (1.01325×10 5 pa) 2 =9.869×10 -5 Below; it is also possible to perform a second vacuum-inflation to make the residual gas in the bag reach the original (9.869×10 ...

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PUM

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Abstract

The invention discloses a method for making lithium battery of soft package in natural environment. On the internal top of battery bag are pre-packed battery body and conductive ring, after deep drying and filling inactive gas, connecting a normal closed gate on the conductive ring to keep waterless and oxygenless in the battery bag; and then evacuating, injecting electrolytic solution, activating actions and other needed chemical actions are performed in the evacuated battery bag; the normal closed gate is the channel for exchanging substance between battery bag and outside.

Description

technical field [0001] The invention relates to a manufacturing process of a lithium-ion battery using an aluminum-plastic composite film as the outer package of the battery, discloses a method for manufacturing a soft-packed lithium-ion battery in a natural environment, and belongs to the technical field of lithium-ion battery manufacturing. Background technique [0002] The flexible packaging lithium-ion battery uses aluminum-plastic composite film as the battery case packaging material. The positive electrode sheet is composed of the positive electrode current collector and the positive electrode film material, and the negative electrode sheet is composed of the negative electrode current collector and the negative electrode film material. A separator is added between the positive and negative electrodes to form the basic battery structure—the battery blank, and the gap of the battery blank is filled with electrolyte to become a battery. Although the manufacturing process...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/02H01M10/38H01M10/40H01M50/105
CPCY02E60/122Y02E60/10
Inventor 张兆谟
Owner 吉林省巨力电池有限公司