Air bag support for improving formation performance of flexible-packaging lithium-ion battery and application method of air bag support

A lithium-ion battery and flexible packaging technology, which is applied in the direction of non-aqueous electrolyte battery, electrolyte battery manufacturing, and climate sustainability. The effect of high efficiency, saving production cost and simple structure

Active Publication Date: 2013-11-20
HUNAN GAOYUAN BATTERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the vacuum pre-sealing is performed after the electrolyte is injected, part of the PP in the inner layer of the aluminum-plastic film of the air bag will fuse together due to the heat diffusion of the head, resulting in a decrease in the effective gas storage volume of

Method used

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  • Air bag support for improving formation performance of flexible-packaging lithium-ion battery and application method of air bag support
  • Air bag support for improving formation performance of flexible-packaging lithium-ion battery and application method of air bag support
  • Air bag support for improving formation performance of flexible-packaging lithium-ion battery and application method of air bag support

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Embodiment 1

[0027] see figure 1 , The battery of this embodiment is a polymer cell 354364 type (cell thickness 3.5mm, width 43mm, length 64mm), the length of the air bag 7 is 64±0.5mm, and the width is 45.0±2.0mm. When the bracket body 1 is not used, the effective width of the air bag 7 is reduced by 10.0mm due to the thermal diffusion of the head when the vacuum pre-sealing is performed after liquid injection, the effective gas storage space is significantly reduced, and the cell body 6 is seriously flatulent after pre-charging , the proportion of rupture of the air bag 7 caused by the smaller volume of the air bag 7 during plastic surgery was 0.10%. The stent body 1 used in the present invention has a base material of PP, a stent size of 40.0±1.0mm in length, 5.0±1.0mm in width, and 1.2±0.1mm in thickness. After using the bracket body 1, the heat radiation of the head is reduced to 2 mm during pre-sealing, and the rupture ratio of the air bag 7 is 0 during plastic surgery.

Embodiment 2

[0029] The battery in this embodiment is a 1072170 type polymer cell (thickness 10mm, width 72mm, length 170mm), the length of the air bag 7 is 170±0.5mm, and the width is 60.0±2.0mm. When the bracket body 1 is not used, the effective width of the air bag 7 is reduced by 15.0mm due to the thermal diffusion of the head when the vacuum pre-sealing is performed after liquid injection, the effective gas storage space is significantly reduced, and the cell body 6 is seriously flatulent after pre-charging , the proportion of rupture of the air bag 7 caused by the smaller volume of the air bag 7 during plastic surgery was 0.17%. The stent body 1 used in the present invention has a base material of PE, a stent size of 140.0±1.0mm in length, 4.0±0.5mm in width, and 9.8±0.1mm in thickness. After using the bracket body 1, the heat radiation of the head is reduced to 1.0 mm during pre-sealing, and the rupture ratio of the air bag 7 is 0 during plastic surgery.

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Abstract

The invention discloses an air bag support for improving the formation performance of a flexible-packaging lithium-ion battery and an application method of the air bag support. A support body (1) is composed of a support frame (2) and division bars (3) which are arranged in the support frame (2) in a staggered way, and the division bars (3) which are arranged in the staggered way divide the support body (1) into a plurality of small channels (4). The air bag support has the functions that the support body (1) is pasted to one side of a flexible-packaging lithium-ion battery air bag through an adhesive tape to support two outer-packaging aluminum plastic films so as to effectively avoid the phenomenon that the inner layers of the aluminum plastic films are fused together due to thermal diffusion when the edge of the air bag is packaged after a solution is injected into a battery core, therefore the effective air storage space of the air bag is increased, the possibility that the battery core cracks due to more gases during shaping after pre-filling is reduced, the interface properties of the positive pole and the negative pole of the battery during the pre-filling of the battery core are improved, and the support is of great help to promoting the electrochemical performance of the battery. The air bag support has the advantages of novel design, simple structure and stable and reliable working performance.

Description

technical field [0001] The invention relates to an air bag support, in particular to an air bag support for a lithium-ion battery using aluminum-plastic film as a packaging material, and also relates to a method for using the air bag support for improving the formation performance of a soft-pack lithium-ion battery. Background technique [0002] At present, in the production process of lithium-ion batteries, especially soft-packed ion batteries using aluminum-plastic film, a large amount of gas will be generated due to the oxidation and reduction of the electrolyte during the pre-charging process of the battery. Existing in the form of air bubbles will seriously affect the electrochemical performance and safety performance of the battery, so an air bag will be reserved during the production process of the soft-packed lithium-ion battery to store the gas generated during the pre-charging process. However, when the vacuum pre-sealing is performed after the electrolyte is injec...

Claims

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Application Information

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IPC IPC(8): H01M10/058
CPCY02E60/12Y02E60/10Y02P70/50
Inventor 唐杰雄李阳春
Owner HUNAN GAOYUAN BATTERY
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