A kind of soft package lithium-ion battery with positioning explosion-proof function and its manufacturing method

A lithium ion battery and a manufacturing method technology are applied in the field of lithium ion batteries to achieve the effects of simple structure, high barrier property and strong exhausting ability

Active Publication Date: 2020-03-27
浙江超恒动力科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of positioning explosion-proof soft-pack lithium-ion batteries, to provide a soft-pack lithium-ion battery with positioning explosion-proof function and its manufacturing method

Method used

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  • A kind of soft package lithium-ion battery with positioning explosion-proof function and its manufacturing method
  • A kind of soft package lithium-ion battery with positioning explosion-proof function and its manufacturing method

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Embodiment one: if figure 2 As shown, the size of the soft pack lithium-ion battery: thickness 10mm, height 227mm, width 161mm. For aluminum-plastic film edge sealing, the aluminum-plastic film packaging heat sealing head is designed to have a V-shaped groove defect structure, which is close to the inner side of the edge sealing. The size of the V-shaped structure is side sealing edge width a: 7mm, and the limit edge sealing width of the defect area b: 3mm, c: 15mm opening length of defect area. The rest of the production process is carried out in accordance with the production process of lithium-ion batteries.

Embodiment 2

[0030] Embodiment 2: The priority blasting defect is that when the aluminum-plastic film is edge-sealed, a packaging barrier is provided between the two layers of aluminum-plastic film. The size of the soft pack lithium-ion battery is: thickness 10mm, height 227mm, width 161mm. When sealing the edge of the aluminum-plastic film, paste a semicircular polyimide plastic sheet or tape on the edge-sealing part, and rely on the high melting point of polyimide to prevent the adhesion of the aluminum-plastic film at the edge after heat-sealing. The specific dimensions of the polyimide plastic are side edge width a: 7mm, limit edge width b of the defect area: 2mm, opening length c of the defect area: 50mm, and the thickness of the polyimide plastic sheet or tape is 0.3mm. The rest of the production process is carried out in accordance with the production process of lithium-ion batteries.

[0031] Use experimental comparison:

[0032] The size of the soft-pack lithium-ion battery is 1...

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Abstract

The invention discloses a soft package lithium-ion battery with location and explosion-proof functions and a manufacturing method of the soft package lithium-ion battery. In order to solve the location and explosion-proof problems of the soft package lithium-ion battery, the soft package lithium-ion battery comprises a battery main body; the soft package lithium-ion battery is characterized in that an explosion-proof region is arranged on the lateral sealing edge of the battery main body; a priority blasting defect is set in the explosion-proof region in the thickness direction of the lateral sealing edge; the battery is firstly torn from the position of the priority blasting defect during thermal runaway; and the priority blasting defect part has high barrier property on external moisture. The explosion-proof region is firstly damaged when the battery is in thermal runaway to play exhaust and explosion-proof roles; the exhaust capability is high; the structure of the explosion-proof region is selectable and controllable according to product requirements; the soft package lithium-ion battery has position fixity; a safety guarantee is provided for packaged design of the battery and the used target object; high barrier property of an original aluminum-plastic film sealing edge on the external moisture is ensured; the manufacturing process is simple; and the comprehensive cost is low.

Description

technical field [0001] The invention relates to lithium-ion battery technology, in particular to a soft-pack lithium-ion battery with a positioning explosion-proof function and a manufacturing method thereof. Background technique [0002] With the increasingly serious problems of environmental pollution and energy consumption, the new energy industry has received widespread attention from all over the world. Lithium-ion batteries have become a research hotspot in recent years due to their environmental friendliness, high energy density, long cycle life, and affordable price. It has been widely used in digital, energy storage, communication, electric vehicles and other fields, especially in the electric vehicle industry, and has been rapidly promoted. [0003] At present, lithium-ion power batteries can be divided into soft-pack batteries, cylindrical batteries, and square metal-shell batteries according to their appearance specifications and shell materials. Among them, sof...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/10H01M2/12H01M10/0525H01M10/058
CPCH01M10/0525H01M10/058H01M50/24H01M50/3425Y02E60/10Y02P70/50
Inventor 李洪涛任宁童祥李玉停孙延先
Owner 浙江超恒动力科技有限公司
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