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Heat-conducting adhesive and secondary battery containing heat-conducting adhesive

A technology of thermal conductive adhesive and hot melt adhesive, applied in the field of lithium ion batteries, can solve problems such as insufficient adhesion and poor thermal conductivity, achieve good thermal conductivity and improve overcharge safety performance.

Active Publication Date: 2016-06-15
DONGGUAN AMPEREX TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, double-sided adhesive tape is mainly used for bonding in the market, which has the defects of poor thermal conductivity and insufficient adhesion

Method used

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  • Heat-conducting adhesive and secondary battery containing heat-conducting adhesive
  • Heat-conducting adhesive and secondary battery containing heat-conducting adhesive
  • Heat-conducting adhesive and secondary battery containing heat-conducting adhesive

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0066] The preparation method of the heat-conducting adhesive of the present application is as follows: in a moisture-free inert gas protection environment, after heating the raw materials, add heat-conducting fillers, stir and disperse evenly, and then seal.

[0067] The present application also relates to the use of the heat-conducting adhesive. The heat-conducting adhesive of the present application can be used in secondary batteries, suitable for any position in the secondary battery that needs to be bonded, and is preferably installed between the battery cell and the safety component. Among them, the safety components include circuit breakers, PTC (Positive Temperature Coefficient) and fuses.

[0068] The present application also relates to a secondary battery, comprising a battery cell, a safety component fixed on the battery cell, and a thermally conductive glue between the battery cell and the safety component, wherein the thermally conductive glue is the thermally cond...

Embodiment 1～9

[0077] Prepare a thermally conductive adhesive according to the hot melt adhesive and thermally conductive filler shown in Table 1, and apply the prepared thermally conductive adhesive between the battery cell and the safety component, and test the performance of the battery cell.

[0078] Preparation method of heat-conducting adhesive: In a moisture-free inert gas protection environment, heat the raw materials, add heat-conducting fillers, stir and disperse evenly, and then seal.

[0079] The preparation method of the battery: apply heat-conducting glue on the safety component, or apply heat-conducting glue on the battery cell, and apply a pressure of 0.1-100N to make the safety component and the battery cell bond firmly; the operating temperature of the heat-conducting glue is 150-200°C.

[0080] Table 1:

[0081]

[0082] The detection method is:

[0083] (1) Initial adhesion test method: Prepare samples with 0.03mg / mm glue drop, cut 3mm×20mm samples, stick TCO after gl...

Embodiment 2

[0093] Prepare a thermally conductive adhesive according to the hot melt adhesive and thermally conductive filler shown in Table 4, and apply the prepared thermally conductive adhesive between the battery cell and the safety component, and test the performance of the battery cell. The preparation method is the same as in Example 1.

[0094] Table 4:

[0095]

[0096]

[0097] The properties of the thermally conductive adhesives of Examples 10 to 26 and the batteries prepared using the thermally conductive adhesive are shown in Table 5 and Table 6:

[0098] table 5:

[0099]

[0100] Table 6:

[0101]

[0102]

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Abstract

The invention relates to the field of lithium ion batteries, particularly a heat-conducting adhesive and a lithium ion battery containing the heat-conducting adhesive. The heat-conducting filler is added into the hot-melt adhesive system to prepare the heat-conducting adhesive. The heat-conducting adhesive has favorable heat-conducting property and adhesive property, and can be used for firmly bonding a protector and an electric core; and meanwhile, heat of the electric core is quickly transferred to the protector through the heat-conducting adhesive, so that the protector is quickly shut down, thereby improving the overcharging safety and protecting the electric core. The heat-conducting adhesive has high initial viscosity, so that the protector can keep good contact with the electric core by the aid of the high viscosity, thereby preventing the heat-conducting adhesive from departing from the electric core under the condition of inflation, deformation or the like of the electric core.

Description

technical field [0001] The present application relates to the field of lithium-ion batteries, in particular, to a heat-conducting glue and a secondary battery containing the heat-conducting glue. Background technique [0002] Lithium-ion batteries have many advantages such as high energy density, long cycle life, environmental friendliness and reproducibility, and have been widely used in various consumer electronics products. However, due to the different chemical systems of lithium ions, the abuse safety performance represented by overcharge is an important difficulty faced by lithium ion batteries. At present, the commonly used measures to improve the safety of lithium-ion batteries when they are abused are through external protection devices, which can greatly improve the safety of lithium-ion batteries when they are abused. [0003] At present, commercial lithium-ion batteries generally have thermal fuses, circuit breakers, and PTCs welded on the outside of the battery...

Claims

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Application Information

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IPC IPC(8): C09J175/08C09J175/06C09J123/08C09J177/02C09J123/06C09J177/12C09J153/02C09J183/04C09J163/00C09J167/00C09J11/04H01M10/613H01M10/653
CPCH01M10/613H01M10/653C08K3/02C08K3/04C08K3/08C08K3/22C08K3/28C08K3/34C08K3/36C08K3/38C08K7/18C08K7/24C09J11/04C09J123/06C09J123/0853C09J153/02C09J163/00C09J167/00C09J175/06C09J175/08C09J177/02C09J177/12C09J183/04C08K2003/222C08K2003/2231C08K2003/2227C08K2003/023C08K2003/0806C08K2003/2296C08K2003/282C08K2201/011C08K2003/385C08K3/14C08K2201/001C09J9/00H01M2200/10H01M10/052H01M2200/106H01M2200/103Y02E60/10H01M50/131C09J129/04H01M10/0525H01M10/4235
Inventor 明帮生高伟赵德强贾士强赵丰刚耿继斌
Owner DONGGUAN AMPEREX TECH
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