Adhesive tape, electrochemical device containing the adhesive tape

An electrochemistry and tape technology, applied in the field of electrochemistry, can solve the problems of battery thermal runaway, battery heat generation, lithium evolution, etc., and achieve the effect of strong resistance to electrolyte corrosion and improved overcharge safety.

Active Publication Date: 2020-11-06
CONTEMPORARY AMPEREX TECH CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the limiting mechanism fails and the voltage exceeds its safe voltage, there will be problems of anode lithium deposition, cathode oxygen release, and battery heat generation, which will seriously cause thermal runaway inside the battery, causing serious safety accidents such as fire and explosion.

Method used

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  • Adhesive tape, electrochemical device containing the adhesive tape
  • Adhesive tape, electrochemical device containing the adhesive tape
  • Adhesive tape, electrochemical device containing the adhesive tape

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] How to make tape:

[0050] Select suitable insulating viscous polymer material and suitable plasticizing material as the matrix material, select conductive carbon black Super P as the conductive material, and dissolve the two in toluene solution according to the ratio of Super P: matrix material = 99:1 by weight , mix evenly, apply it on the PET release film by a coating machine, and apply a certain thickness (1 μm) to form a conductive layer. Then coat a matrix material layer with a certain thickness (1 μm) on the surface of the conductive layer to form the first adhesive layer. Transfer the two-layer structure to the PET release film, the first adhesive layer is to the PET release film, and then coat a matrix material layer with a certain thickness (1 μm) on the other surface of the conductive layer to form the second adhesive layer. Paste a release film on the second bonding layer to obtain a temperature-sensitive conductive adhesive tape.

[0051] The lithium io...

Embodiment 2-8

[0070] Examples 2-8 The adhesive tape and battery were prepared according to the method of Example 1. The material components and parts by weight in each layer of the adhesive tape and the thickness of each layer are shown in Table 1.

[0071] Table I

[0072]

[0073]

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PUM

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Abstract

The invention relates to an adhesive tape, and an electrochemical device containing the adhesive tape. The adhesive tape comprises a first bonding layer, a second bonding layer, and a conductive layerarranged between the first bonding layer and the second bonding layer; the adhesive tape is electrically insulative at normal temperature; the conductive layer comprises a matrix, and a conductive material dispersed in the matrix; at 60 to 120 DEG C, inter-miscible of the matrix with the first bonding layer and the second bonding layer is realized, so that the conductive material is dispersed inthe first bonding layer and the second bonding layer. The adhesive tape is a temperature sensitive adhesive tape, after temperature increasing, electric insulation performance can be converted to be conductive performance; the adhesive tape can be taken as an electric core head part or tail part adhesive tape, battery overcharging and heating are avoided, and overcharging safety is improved.

Description

technical field [0001] The invention relates to the field of electrochemical technology, in particular to an adhesive tape and an electrochemical device containing the adhesive tape. Background technique [0002] Electrochemical devices, such as lithium-ion batteries, have many repeated charging and discharging processes during use. During the charging process, the charging upper limit voltage is controlled by programs, chips, etc. When the limiting mechanism fails and the voltage exceeds its safe voltage, problems such as anode lithium deposition, cathode oxygen release, and battery heat generation will occur, which will seriously cause internal thermal runaway of the battery, resulting in serious safety accidents such as fire and explosion. Improving overcharge safety is an urgent problem for lithium-ion batteries. Contents of the invention [0003] In view of this, the first aspect of the present invention provides an adhesive tape, which can effectively improve the b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J9/02
CPCC09J9/02C09J2301/124C09J2301/312
Inventor 钟泽戴璐魏奕民柳娜赵丰刚
Owner CONTEMPORARY AMPEREX TECH CO
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