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Battery bag with explosion-proof security and manufacture method thereof

A manufacturing method and technology of battery bags, which are applied in battery pack parts, battery boxes/jackets, chemical instruments and methods, etc., can solve the problems of poor interlayer adhesion, thermal bonding strength of sealant layer 2 (poor tightness). , exposure to explosion hazards and other issues, to achieve the effects of preventing explosion hazards, improving interlayer adhesion, and excellent thermal bonding strength

Active Publication Date: 2014-12-10
YOULCHON CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such high heat and pressure can cause an explosion, and the existing battery pack P does not have technical means capable of preventing the explosion hazard as described above, therefore, there is a problem of being exposed to the explosion hazard
[0009] In addition, the battery pouch P according to the prior art has the problem of poor interlayer adhesion due to poor thermal bonding strength (sealing) of the sealant layer 2
In particular, the gas barrier layer 1 is made of a metal such as Al, which has a problem of poor interlayer adhesion between the gas barrier layer 1 and the sealant layer 2.

Method used

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  • Battery bag with explosion-proof security and manufacture method thereof
  • Battery bag with explosion-proof security and manufacture method thereof
  • Battery bag with explosion-proof security and manufacture method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0066] A sealant layer comprising 100 parts by weight of a sealant resin (acrylic resin) and 10 parts by weight of microcapsules was coated on the gas barrier layer (aluminum foil) to manufacture a battery pouch. The size of the microcapsule is 20-30 μm, the heat-expandable substance of the microcapsule core is hydrocarbon, and the shell material is acrylonitrile copolymer. The shell thickness is 2-5 μm.

[0067] Figure 7 These are electron micrographs of microcapsules 25 used in Examples of the present invention before and after expansion (170° C.).

[0068] and, Figure 8 Indicates the expansion factor (times) of the battery bag manufactured according to the embodiment of the present invention with temperature. which is, Figure 8 The expansion factor (times) of the microcapsules with each temperature is shown graphically. in addition, Figure 8 , which are enlarged photographs of the battery pouch manufactured according to an example of the present invention, are sho...

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Abstract

The invention provides a battery bag with explosion-proof security and a manufacture method thereof. The battery bag comprises a gas barrier layer and a sealant layer. The sealant layer comprises sealing resin and heat-expandable microcapsules wherein gas holes are formed through heat expansion. Heat or pressure generated by the battery is conducted to the exterior through the heat-expandable microcapsules, and thereby explosion danger is prevented.

Description

technical field [0001] The present invention relates to a battery pouch and a manufacturing method thereof, and more particularly relates to a battery pack that, when there is a danger of explosion caused by heat or pressure, etc., is discharged to the outside through pores formed in a sealant layer and poses a threat to the explosion hazard. Safety battery pouch and manufacturing method thereof. Background technique [0002] Usually, batteries (cells) such as lithium ion secondary batteries are built in metal cans (metal cans). Aluminum (Al) is mainly used for metal cans, and it has a cylindrical or square (cuboid, etc.) shape by press working. [0003] However, since the outer wall of the metal can is hard, the shape of the battery itself is determined by the shape of the metal can, which is restricted. To overcome such constraints, flexible cell pouches are being developed and used. Generally, battery pouches are manufactured with a multilayer structure in consideratio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/02B32B1/02B32B5/30B32B1/00
CPCY02E60/10H01M10/52B32B27/08H01M50/105H01M50/124H01M50/121H01M50/119H01M50/183H01M50/579H01M50/581
Inventor 韩喜植金暻灿杜胜均
Owner YOULCHON CHEM