Conductive adhesive for over-temperature overcurrent protective element and production method thereof

A technology for protecting components, over-temperature and over-current, applied in the direction of electrical components, conductive adhesives, circuits, etc., can solve problems such as occupying a large volume, unable to meet surface mount requirements, etc., and achieve improved safety factor and circuit safety protection Enhanced action and low production cost

Active Publication Date: 2013-12-11
NANJING SART SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a conductive adhesive for over-temperature and over-current protection elements with dual functions of over-temperature and over-current and its manufacturing method, so as to solve the existing need of over-temperature protection elements to be set as a The problem of shape, occupying a large volume, and unable to meet the requirements of surface mount,

Method used

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  • Conductive adhesive for over-temperature overcurrent protective element and production method thereof
  • Conductive adhesive for over-temperature overcurrent protective element and production method thereof
  • Conductive adhesive for over-temperature overcurrent protective element and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The addition ratio of all raw materials is calculated based on the weight of low melting point alloy powder;

[0052] a. Put the low-melting alloy powder with an average particle size of 10 μm into a 10wt% alkali solution and stir for 5 minutes for alkali washing to remove oil stains on the surface of the alloy powder, then wash with deionization for 3 to 5 times until neutral, and then filter ,drying;

[0053] b. Put the alloy powder obtained in step a into the carbonic acid solution of 1wt% concentration and stir for 5 minutes, carry out pickling, remove the oxide on the surface of the alloy powder, then wash 3 to 5 times with deionized water to neutrality, and then use Rinse once with acetone, filter and dry for later use;

[0054] C, take by weighing silver nitrate according to the 20% proportioning of low-melting-point alloy powder weight, and add deionized water to dissolve, then add the ethylenediamine of 15% of above-mentioned low-melting-point alloy powder wei...

Embodiment 2

[0061] a. Put the low-melting alloy powder with an average particle size of 4 μm into a 15wt% alkali solution and stir for 5 minutes for alkali washing to remove the oil stains on the surface of the alloy powder, then wash with deionization for 3 to 5 times until neutral, and then filter ,drying;

[0062] b. Put the alloy powder obtained in step a into the 0.2wt% concentration of acetic acid solution and stir for 5min, carry out pickling, remove the oxides on the surface of the alloy powder, then wash with deionized water 3 to 5 times until neutral, and then Rinse once with acetone, filter and dry for later use;

[0063] C, take by weighing silver acetate according to the 10% proportioning of low-melting-point alloy powder weight, and add deionized water to dissolve, then add the diethylenetriamine of 25% of above-mentioned low-melting-point alloy powder weight, prepare silver amine solution;

[0064] d, based on the weight of the low-melting point alloy powder, take 0.1% ben...

Embodiment 3

[0071] A conductive adhesive for over-temperature and over-current protection components, which is composed of matrix resin and conductive filler, the matrix resin is epoxy resin, and the conductive filler is low-melting-point alloy metal powder plated with silver on the surface. One of tin-copper alloy, tin-silver-copper alloy, tin-bismuth alloy, tin-bismuth-silver alloy and tin-indium alloy between ℃, the average particle size is 10μm, and the added amount is 50wt by weight %~80wt%

[0072] The preparation method of the conductive adhesive for the above-mentioned over-temperature and over-current protection element comprises the following steps:

[0073] The addition ratio of all raw materials is calculated based on the weight of low melting point alloy powder;

[0074] a. Put the low-melting alloy powder with an average particle size of 20 μm into a 3wt% alkali solution and stir for 5 minutes for alkali washing to remove oil stains on the surface of the alloy powder, then ...

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Abstract

The invention provides conductive adhesive for an over-temperature overcurrent protective element with over-temperature and overcurrent dual functions and a production method thereof, in order to solve the problems that the existing over-temperature protective element needs to be provided with pins, occupied volume is large and the surface mounting requirement can not be met. The conductive adhesive for the over-temperature overcurrent protective element is composed of matrix resin and a conductive filler, wherein the matrix resin is at least one of systems of epoxy resin, organic silicon resin, polyimide resin, phenolic resin, polyurethane and acrylic resin; the conductive filler is at least one of gold, silver, copper, aluminium and nickel metal powders or a graphite conductive compound. A protective element prepared from the conductive adhesive has over-temperature and overcurrent dual functions, electrical conductivity of an inner-layer low-melting-point alloy is at least two orders of magnitude lower than that of a silver surface; in a circuit, current is only conducted by virtue of the silver surface, and the electrical conductivity of the conductive adhesive can not be obviously reduced due to shunting effect of a low-melting-point alloy.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a method for preparing conductive adhesive mainly composed of silver-plated low-melting-point alloy powder and matrix resin, and a method for using the conductive adhesive as fuse paste to make over-temperature and over-current protection components. Background technique [0002] With the continuous advancement of science and technology, various portable electronic devices, such as mobile phones, digital cameras, camcorders, notebook computers, tablet computers, handheld game consoles, players, etc., have gradually penetrated into people's daily lives and become an indispensable part of them. . As a matter of course, the safety of batteries, which are an important part of these portable devices, has been paid more and more attention by people. Lithium-ion batteries occupy the mainstream position in the battery market due to their significant advantages of large cap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J9/02C09J163/00C09J183/04C09J179/08C09J161/06C09J175/04C09J133/00H01M2/34H01M50/581H01M50/583H01M50/59
CPCY02E60/12Y02E60/10
Inventor 南式荣刘明龙
Owner NANJING SART SCI & TECH DEV
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