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Lithium ion battery composite PET adhesive tape

A lithium-ion battery and adhesive tape technology, applied in the field of lithium-ion batteries, can solve the problems of loose packaging structure, battery removal, waste, etc., and achieve the effects of environmental protection, no pollution and waste, convenient and safe operation

Inactive Publication Date: 2020-12-11
WANXIANG 123 CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to overcome the problems of the traditional lithium-ion battery PET tape packaging structure being loose, the pasting place hindering the direct and effective infiltration of the electrolyte, and the tape still needs to be removed and discarded when the battery cell is disassembled to cause waste of resources, the invention provides a lithium-ion battery composite PET The tape not only retains the advantages of the original PET tape, but also has the characteristics of heat sealing, which is more conducive to the direct and effective infiltration of the electrolyte and improves the performance of lithium-ion batteries

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A lithium-ion battery composite PET tape, including a PET polyester substrate layer and an acrylic adhesive layer and a polypropylene (PP) thermoplastic layer coated on both sides of the PET polyester substrate layer; the coating layer passes through the slit Type coating machine roll coating, set the speed of the running machine to 350m / min, the curing temperature to 200°C, one side is made of acrylic adhesive material, the other side is made of polypropylene (PP) material, and the width of the composite PET tape is 6.0 mm. The thickness is 0.09 mm, of which the thickness of the PET polyester substrate layer is 0.02 mm, and the peel strength is 0.5 kgf / in; the thickness of the PP layer is 0.03 mm, and the peel strength is 1.0 kgf / in.

[0029] The above-mentioned lithium-ion battery composite PET tape was applied as a soft pack NCM111 / graphite lithium-ion battery tape with a rated capacity of 26Ah. After the battery cell was left for 4 hours after filling the electrolyte...

Embodiment 2

[0031] A lithium-ion battery composite PET adhesive tape, comprising a PET polyester substrate layer and an acrylic adhesive layer and a thermoplastic layer coated on both sides of the PET polyester substrate layer; the coating layer passes through a slit coater roll For coating, set the speed of the running machine to 350m / min, and the curing temperature to 200°C. One side is made of acrylic adhesive material, and the other side is made of ethylene-vinyl acetate copolymer (EVA resin). The width of the composite PET tape is 5.7 mm, and the thickness is The thickness of the PET polyester substrate layer is 0.03 mm, and the peel strength is 0.6kgf / in; the thickness of the EVA resin layer is 0.03 mm, and the peel strength is 0.85 kgf / in.

[0032] The above-mentioned lithium-ion battery composite PET tape was applied as a soft pack NCM111 / graphite lithium-ion battery tape with a rated capacity of 26Ah. After the battery cell was left for 4 hours after filling the electrolyte, it wa...

Embodiment 3

[0034] A lithium-ion battery composite PET adhesive tape, comprising a PET polyester substrate layer and an adhesive layer and a thermoplastic layer coated on both sides of the PET polyester substrate layer; coated by a slit coater roll coating, set The speed of the running machine is 350m / min, the curing temperature is 200°C, one side is made of acrylic adhesive material, and the other side is made of silicone surfactant modified EVA resin material, the width of the composite PET tape is 6.3 mm, and the thickness is 0.1 mm, of which The thickness of the PET polyester substrate layer is 0.03 mm, and the peel strength is 0.6 kgf / in; the thickness of the silicone surfactant-modified EVA resin layer is 0.03 mm, and the peel strength is 1.0 kgf / in.

[0035]The above-mentioned lithium-ion battery composite PET tape was applied as a soft pack NCM111 / graphite lithium-ion battery tape with a rated capacity of 26Ah. After the battery cell was left for 4 hours after filling the electroly...

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Abstract

The invention relates to the technical field of lithium ion batteries, provides a lithium ion battery composite PET adhesive tape, and aims to solve the problems that a traditional lithium ion batteryPET adhesive tape is loose in packaging structure, the pasting position hinders direct and effective infiltration of an electrolytic solution, the adhesive tape still needs to be removed when a battery cell is disassembled, and resource waste is caused by discarding. The lithium ion battery composite PET adhesive tape comprises a base material layer, and a bonding layer and a thermoplastic layerwhich are coated on the two sides of the base material layer. According to the invention, the advantages and characteristics of the original PET adhesive tape are retained, the heat sealing characteristic is also realized, the residual space in the battery cell is reduced, and the structure is more compact; the vacuum liquid injection effect, the electrolytic solution infiltration effect and the evacuation effect of the battery core are promoted; and the cycle performance of the battery core is improved, so that the performance of the lithium-ion battery is improved.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a lithium ion battery composite PET adhesive tape. Background technique [0002] As a kind of green energy, lithium-ion battery has attracted much attention due to its unique advantages such as high specific energy, high working voltage, wide application temperature range, low self-discharge rate, long cycle life, and no pollution. It has the characteristics of the current battery industry development, The development of the telecommunications and information markets, especially the massive use of mobile phones and notebook computers, has huge market opportunities. [0003] At present, during the assembly and production process of lithium-ion batteries, the tape used for pouch batteries is basically PET tape, and the main application process is stacking and welding. The purpose of using PET tape for the lamination section is to bond and fix the diaphragm and the ba...

Claims

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Application Information

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IPC IPC(8): C09J7/25C08J7/04H01M10/0525H01M10/058C08L67/02
CPCC09J7/255H01M10/0525H01M10/058C09J2467/006C09J2433/00C09J2203/33C08J2367/02C08J2423/12Y02E60/10Y02P70/50
Inventor 赵翊鸣宋有志张志剑饶绍建刘涛宋明李凡群
Owner WANXIANG 123 CO LTD
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