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Secondary battery and production method thereof

A secondary battery and cell technology, applied in the field of lithium-ion batteries, can solve the problems of insufficient adhesion and poor thermal conductivity, achieve good thermal conductivity, improve overcharge safety performance, and avoid the effect of detaching from the surface of the cell

Inactive Publication Date: 2016-06-08
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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  • Secondary battery and production method thereof
  • Secondary battery and production method thereof
  • Secondary battery and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0086] The preparation method of the heat-conducting adhesive of this application is as follows: in a moisture-free inert gas protection environment, heat the raw materials, add heat-conducting fillers, stir and disperse evenly, and then seal.

[0087] As an improvement of the secondary battery of this application, the area of ​​the thermal conductive glue is 1mm 2 ~500mm 2 , the thickness of the heat-conducting adhesive is 0.05-5 mm.

[0088] The present application also relates to a preparation method of the secondary battery. Applying heat-conducting glue on the safety component, or applying heat-conducting glue on the battery cell, and applying a pressure of 0.1-100N to make the safety component and the battery cell adhere firmly. Preferably, the operating temperature of the thermally conductive adhesive is 150-200°C.

[0089] In this application, the application method of thermal conductive adhesive can be coating, coating, sticking, placing, etc.; the coating method ca...

Embodiment 1～9

[0095] Prepare a thermally conductive adhesive according to the hot melt adhesive and 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.

[0096] 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.

[0097] The preparation method of the battery: apply heat-conducting glue on the safety component, or apply heat-conducting glue on the battery core, and apply a pressure of 0.1-100N to make the safety component and the battery core adhere firmly. Preferably, the operating temperature of the thermally conductive adhesive is 150-200°C.

[0098] Table 1:

[0099]

[0100] The properties of the thermally conductive adhesives of Examples 1-9 and Comparative Examples 1-3 are shown in Table 2:

[0101] Table 2...

Embodiment 2

[0113] Prepare a thermally conductive adhesive according to the hot melt adhesive and 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.

[0114] Table 4:

[0115]

[0116]

[0117] The properties of the thermally conductive adhesives of Examples 10-30 are shown in Table 5:

[0118] table 5:

[0119]

[0120] The performance of the detected battery is shown in Table 6:

[0121] Table 6:

[0122]

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Abstract

The invention relates to the field of lithium ion batteries, in particular to a secondary battery. The secondary battery comprises a core, a safety component and a heat-conducting adhesive, wherein the safety component is fixed on the core, the heat-conducting adhesive is positioned between the core and the safety component and contains at least one of hot melt adhesive, silicone adhesive or epoxy resin adhesive as well as heat-conducting filler. The secondary battery has the advantages that a protective device and the core can be firmly adhered by the heat-conducting adhesive with excellent heat-conducting performance and adhesive performance; core heat can be transferred to the protective device by the heat-conducting adhesive to enable the protective device to be disconnected quickly, so that overcharge safety is improved, the core is protected, and the heat-conducting adhesive is prevented from being separated from the core when the core swells or deforms and the like.

Description

technical field [0001] The present application relates to the field of lithium ion batteries, in particular, to a secondary battery containing thermally conductive glue and a preparation method thereof. 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. This measure 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/08C09J175/06C09J123/08C09J177/02C09J123/06C09J177/12C09J153/02C09J183/04C09J163/00C09J167/00C09J11/04H01M10/613H01M10/653
CPCH01M10/613H01M10/653C08K3/02C08K3/04C08K3/08C08K3/22C08K3/28C08K3/34C08K3/36C08K3/38C08K7/18C08K7/24C09J11/04C09J123/06C09J123/0853C09J153/02C09J163/00C09J167/00C09J175/06C09J175/08C09J177/02C09J177/12C09J183/04C08K2003/2227C08K2003/222C08K2003/2231C08K2003/2296C08K2003/282C08K2201/011C08K2003/385C08K2003/023C08K2003/0806C08G18/4825C08G18/73C08G18/7621C08G18/7664C08G18/7671C08G18/4238C09J175/04C08G2170/20C08K2003/382H01M2200/10C09J177/00C09K5/14C09J9/00C09J1/00H01M2200/106H01M2200/103Y02E60/10H01M50/581Y02P70/50C08G18/10C08G18/307C08K3/14
Inventor 明帮生赵德强高伟汪颖项春江陈绍宇
Owner DONGGUAN AMPEREX TECH
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