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Single-sided hot-melt termination adhesive tape for lithium battery and preparation method of single-sided hot-melt termination adhesive tape

A technology for terminating tapes and lithium batteries, applied in the direction of adhesives, adhesive types, film/sheet adhesives, etc. The effect of excellent electrolyte aging resistance

Pending Publication Date: 2022-02-15
YANTAI DARBOND TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing solution is to use hot-melt adhesive tape to fix the inner surface of the lithium battery cell and the outer packaging aluminum-plastic film. The Chinese invention patent CN104610883 discloses that polyethylene terephthalate is used as the base material and coated with synthetic rubber Ethylene-isoprene-styrene copolymer (SIS), low-molecular-weight polyolefin rubber, and petroleum resin rubber-type pressure-sensitive adhesives are cross-linked with initiators, and the tapes made have the following disadvantages: (1) tapes The overall thickness is thicker, which affects the energy density of lithium batteries to a certain extent; (2) Use polyethylene terephthalate (PET) as the tape base material, and after bonding under a certain temperature and pressure, it is resistant to electrolyte sticking Poor connection performance, which has potential impact on battery performance and safety

Method used

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  • Single-sided hot-melt termination adhesive tape for lithium battery and preparation method of single-sided hot-melt termination adhesive tape
  • Single-sided hot-melt termination adhesive tape for lithium battery and preparation method of single-sided hot-melt termination adhesive tape
  • Single-sided hot-melt termination adhesive tape for lithium battery and preparation method of single-sided hot-melt termination adhesive tape

Examples

Experimental program
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Effect test

Embodiment 1

[0030] A single-sided hot-melt terminated adhesive tape for lithium batteries, with a total thickness of 25um, including a first pressure-sensitive adhesive layer, a second adhesive layer, and a third substrate layer arranged in sequence from top to bottom;

[0031] The coating thickness of the first pressure-sensitive adhesive layer is 10 μm, and includes the following components in parts by weight:

[0032] Hydrogenated styrene block copolymer SEBS G1654 (Kraton) 45 parts, amorphous α-olefin copolymer Vestoplast 408 (Evonik) 5 parts, hydrogenated petroleum resin ARKON P90 (Arakawa) 40 parts, modified terpene resin 5 parts, Antioxidant Irganox 1010 1 part;

[0033] The coating thickness of the second adhesive layer is 5 μm, and includes the following components in parts by weight:

[0034] Hydrogenated styrene block copolymer SEBS G1654 (Kraton) 40 parts, amorphous α-olefin copolymer Vestoplast 408 (Evonik) 35 parts, hydrogenated petroleum resin ARKON P125 (Arakawa) 15 parts...

Embodiment 2

[0037] A single-sided hot-melt terminated tape for lithium batteries, with a total thickness of 20um, including a first pressure-sensitive adhesive layer, a second adhesive layer, and a third substrate layer arranged in sequence from top to bottom;

[0038] The coating thickness of the first pressure-sensitive adhesive layer is 5 μm, and includes the following components in parts by weight:

[0039] Hydrogenated styrene block copolymer SEBS G1650 (Kraton) 47 parts, amorphous α-olefin copolymer Vestoplast 308 (Evonik) 5 parts, hydrogenated petroleum resin ARKON P100 (Arakawa) 40 parts, modified terpene resin 5 parts, Antioxidant Irganox 1010 1 part;

[0040] The coating thickness of the second adhesive layer is 5 μm, and includes the following components in parts by weight:

[0041] Hydrogenated styrene block copolymer SEBS G1650 (Kraton) 42 parts, amorphous α-olefin copolymer Vestoplast 308 (Evonik) 35 parts, hydrogenated petroleum resin ARKON P125 (Arakawa) 15 parts, oxidize...

Embodiment 3

[0044] A single-sided hot-melt terminated tape for lithium batteries, with a total thickness of 16um, including a first pressure-sensitive adhesive layer, a second adhesive layer, and a third substrate layer arranged in sequence from top to bottom;

[0045] The coating thickness of the first pressure-sensitive adhesive layer is 3 μm, and includes the following components in parts by weight:

[0046] Hydrogenated styrene block copolymer SEPS G1657 (Kraton) 45 parts, amorphous α-olefin copolymer Vestoplast 508 (Evonik) 10 parts, hydrogenated petroleum resin ARKON P115 (Arakawa) 39 parts, modified terpene resin 5 parts, Antioxidant Irganox 1076 1 part;

[0047] The coating thickness of the second adhesive layer is 3 μm, and includes the following components in parts by weight:

[0048] Hydrogenated styrene block copolymer SEPS G1657 (Kraton) 42 parts, amorphous α-olefin copolymer Vestoplast 508 (Evonik) 35 parts, hydrogenated petroleum resin ARKON P140 (Arakawa) 15 parts, oxidized...

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Abstract

The invention relates to a single-sided hot-melt termination adhesive tape for a lithium battery and a preparation method of the single-sided hot-melt termination adhesive tape. The single-sided hot-melt termination adhesive tape comprises a first pressure-sensitive adhesive layer and a second adhesive layer which are sequentially arranged from top to bottom; the first pressure-sensitive adhesive layer has viscidity at normal temperature and is used for bonding the outer surface of a lithium battery cell, and the second adhesive layer has low viscidity at normal temperature and is used for connecting the first pressure-sensitive adhesive layer and a base material; the total thickness of the single-sided hot melt adhesive tape for the lithium battery is 8-25 microns; materials used in the adhesive tape do not react with electrolyte, good stability can be kept in an electrolyte, the lithium battery cell and an outer package aluminum plastic film are bonded mainly through heating and pressurizing, and the adhesive strength is high after electrolyte aging resistance; and meanwhile, the thickness of the adhesive tape is reduced to be 25 microns or less through the design, and the energy density of the battery is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of adhesives, in particular to a single-sided hot-melt termination adhesive tape for lithium batteries and a preparation method thereof. Background technique [0002] Lithium-ion battery is a kind of rechargeable battery. Due to its high working voltage, small size, light weight, high energy, no memory effect, small self-discharge, and long cycle life, it is widely used in portable fields such as mobile phones and notebooks. In addition, since lithium-ion batteries do not contain heavy metal chromium, compared with nickel-chromium batteries, the pollution to the environment is greatly reduced. [0003] With the development of science and technology, the requirements for lithium batteries in various application fields are getting higher and higher, especially the trend of high energy density and lightweight, and the anti-drop performance of lithium batteries determines the stability and safety of lithium batt...

Claims

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Application Information

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IPC IPC(8): C09J7/38C09J7/10C09J153/02C09J123/00C09J157/02C09J145/00C09J123/30C09J11/06
CPCC09J7/387C09J7/10C09J153/025C09J11/06C09J2203/33C09J2203/326C09J2301/122C09J2301/208C09J2301/302C08L23/00C08L57/02C08L45/00C08K5/1345C08L23/30
Inventor 李龙王建斌陈田安徐友志
Owner YANTAI DARBOND TECH
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