Novel flexibly-packaged lithium ion battery and preparation method therefor

A lithium-ion battery and soft pack technology, which is used in the manufacture of electrolyte batteries, secondary batteries, battery pack components, etc. The effect of improving the service life and improving the safety performance

Active Publication Date: 2016-04-13
SHANDONG GOLDENCELL ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the outer packaging of soft-pack lithium-ion batteries is aluminum-plastic film, which will inevitably infiltrate into the air during long-term use after vacuum packaging. Moisture and impurities in the air will inevitably affect the service life of lithium-ion batteries. In addition, lithium-ion batteries will be damaged. When the internal air pressure is too high, the aluminum-plastic film packaging part expands, and the inside of the lithium-ion battery contacts the air, and the lithium inside the battery reacts with the air, causing danger. In order to improve the service life of the soft-pack lithium-ion battery and reduce the safety hazard of the soft-pack lithium-ion battery , first of all, it is necessary to improve the structure of the soft-pack lithium-ion battery

Method used

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  • Novel flexibly-packaged lithium ion battery and preparation method therefor
  • Novel flexibly-packaged lithium ion battery and preparation method therefor
  • Novel flexibly-packaged lithium ion battery and preparation method therefor

Examples

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Effect test

Embodiment 1

[0028] A new type of aluminum-plastic film for soft-packed lithium-ion batteries such as figure 1 and figure 2 shown. The aluminum-plastic film is formed by adding a circle of pits around the periphery on the basis of traditional aluminum-plastic film forming, that is, the outer edge banding 104 . The cross-sectional view of the new flexible packaging lithium-ion battery is as follows image 3 As shown, the glued lug 201 on the battery cell 2 is a structure of two layers of glue distributed up and down.

[0029] Firstly, the new soft-packed lithium-ion battery cell 2 is packaged with inner bottom sealing edge 1021, inner side sealing edge 1022 and inner top sealing edge 1023. When top sealing, two layers of aluminum-plastic film are sandwiched between the first glue of the two glues. Then carry out conventional battery baking, liquid injection, chemical formation and other processes. After formation, the soft-packed lithium-ion battery is sealed twice. When sealing, first...

Embodiment 2

[0032] A new type of aluminum-plastic film for soft-packed lithium-ion batteries such as figure 1 and figure 2 shown. The aluminum-plastic film is formed by adding a circle of pits around the periphery on the basis of traditional aluminum-plastic film forming, that is, the outer edge banding 104 . The cross-sectional view of the new flexible packaging lithium-ion battery is as follows Figure 4 As shown, the glued lug 201 on the internal cell 2 of the new soft-pack lithium-ion battery is a wide glue structure.

[0033] Firstly, the battery cell 2 of the new soft-packed lithium ion is packaged with inner bottom sealing edge 1021, inner side sealing edge 1022 and inner top sealing edge 1023, and one end of the wide glue is sandwiched between two layers of aluminum-plastic film during top sealing. Then carry out conventional battery baking, liquid injection, chemical formation and other processes. After formation, the soft-packed lithium-ion battery is sealed twice. When sea...

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Abstract

The invention discloses a novel flexibly-packaged lithium ion battery and a preparation method therefor. The service life of the flexibly-packaged lithium ion battery can be prolonged, and the safety performance can be improved; two rings of sealed packaging edges are arranged on the periphery of an aluminium plastic film cell of the flexibly-packaged lithium ion battery; the two packaging edges comprise an inner side packaging edge and an outer side packaging edge; and an inert gas airbag is arranged between the inner side packaging edge and the outer side packaging edge. According to the novel flexibly-packaged lithium ion battery, the inert gas airbag is arranged around the cell part of the novel flexibly-packaged lithium ion battery, so that the internal cell is isolated from the external; moisture in the outside is hard to penetrate the packaging part and enter the interior of the cell, so that the service life of the battery is prolonged, and the production cost is saved; the inert gas airbag is arranged around the cell part of the novel flexibly-packaged lithium ion battery; the inner side packaging is relatively thick and the outer side packaging is relatively thin, so that when the interior of the battery cell is inflated, the inner side packaging part is inflated to be opened firstly, and the inert gas enters the cell part; therefore, a large amount of air is prevented from entering the interior of the cell to react with lithium to result in danger, and the safety performance of the battery is improved.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion batteries, and relates to a soft-pack lithium-ion battery with high safety performance and long service life. Background technique [0002] Soft-pack lithium-ion batteries have high energy density, good safety performance and rate performance, and have become the most ideal power source at present. With the rapid development of new energy sources, people put forward higher and higher requirements for lithium-ion battery performance, especially safety performance. and service life requirements. [0003] At present, the outer packaging of soft-pack lithium-ion batteries is aluminum-plastic film, which will inevitably infiltrate into the air during long-term use after vacuum packaging. Moisture and impurities in the air will inevitably affect the service life of lithium-ion batteries. In addition, lithium-ion batteries will be damaged. When the internal air pressure is too high, the aluminum-pla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0525H01M2/02H01M10/058H01M50/10H01M50/183
CPCH01M10/0525H01M10/058H01M50/124H01M50/116Y02E60/10Y02P70/50
Inventor 关成善宗继月张敬捧王勇李涛
Owner SHANDONG GOLDENCELL ELECTRONICS TECH
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