Fusing agent and temperature fuse containing the same

A thermal fuse and flux technology, which is applied in emergency protection devices, circuits, electrical components, etc., can solve the problems affecting the appearance of thermal fuses, lack of flux, flux bubbles, etc., to improve fusing performance and eliminate corrosion , the effect of maintaining stability

Active Publication Date: 2011-11-16
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The thermal fuse made of the above-mentioned flux can have good electrical fusing performance, but the flux containing simethicone oil is easy to form bubbles, which affects the shape of the thermal fuse, and is also prone to deterioration during long-term storage. Does not work as a flux

Method used

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  • Fusing agent and temperature fuse containing the same
  • Fusing agent and temperature fuse containing the same
  • Fusing agent and temperature fuse containing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The flux of the present invention is obtained by the following process: take 6g of stearic acid and add it to 10g of n-butanol, put it into a thermostat at 120°C until it dissolves, then add 40g of common rosin, stir and mix evenly, and put it into a heating furnace Heat it until it boils, take it out and add 1g of glacial acetic acid until it cools down to room temperature, put the above-mentioned flux on the cover film with a glue dispenser, and ultrasonically weld it into shape.

[0027] Molding the cylindrical first alloy wire in a mold to form a low-melting-point alloy wire (4), the diameter of the cylindrical first alloy wire is 0.4mm, and the main components are In, Sn, and Bi; the molded low-melting-point alloy wire The cross-sectional area is 0.126mm 2 .

[0028] The components of the thermal fuse are packaged to prepare the thermal fuse.

Embodiment 2

[0030] Weigh 6.5g of stearic acid and add it to 10g of n-butanol, put it in a thermostat at 120°C until it dissolves, then add 30g of ordinary rosin, stir and mix evenly, put it in a heating furnace and heat until it boils, take it out and add 1g Glacial acetic acid is until it is cooled to room temperature, and other preparation techniques are with embodiment 1.

[0031] The cylindrical first alloy wire is molded in a mold to form a low melting point alloy wire (4). The diameter of the cylindrical first alloy wire used in the present invention is 0.5 mm, and the main components are In, Sn, and Bi; the low melting point alloy wire formed by molding The cross-sectional area of ​​the alloy wire is 0.196mm 2 .

Embodiment 3

[0033] Weigh 7g of stearic acid and add it to 10g of n-butanol, put it in a constant temperature box at 120°C until it dissolves, then add 30g of ordinary rosin, stir and mix evenly, put it in a heating furnace and heat it until it boils, take it out and add 1g of ice Acetic acid is until it is cooled to room temperature, and other preparation techniques are with embodiment 1. After the flux was placed in the air for 4 days, it was made into a thermal fuse to test its performance.

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Abstract

The invention relates to a flux and a temperature fuse with the flux, wherein the flux is formed by mixing common rosin, stearic acid, liquid alcohol and minim small molecule acid in the following mixing ratio (weight percent): 50 percent to 70 percent rosin, 5 percent to 20 percent stearic acid, 10 percent to 40 percent liquid alcohol and 0.5 percent to 16 percent small molecule acid. The temperature fuse element comprises an electrode slice (1), an insulation bottom film (21) and insulation upper film (22), the flux (3) and a lower melting point alloy wire (4). Compared with the prior flux,the flux of the invention obviously improves the thermal-link performance and does not decompose during storage, and well maintain the activity of the flux. The thermal-link performance of the temperature fuse element used by lithium ion cell produced by the invention is obviously improved, thus forming better protection for lithium cell.

Description

technical field [0001] The invention relates to an electric fuse element for protecting electronic products, in particular to a temperature fuse containing the flux for protecting a lithium ion battery. Background technique [0002] With the rapid development of the IT industry, various electronic and electrical products are more and more widely used in people's lives. Such products often cause damage to the circuit due to overcurrent, overheating and other reasons during use, thus affecting the normal use of the product. The same is true for lithium-ion batteries, which are now widely used. Therefore, in order to ensure the safety of the lithium battery, the lithium battery is equipped with a temperature insurance element. When the above situation occurs, the thermal fuse will blow to protect the circuit and the product. Flux needs to be added to the thermal fuse to ensure that when the alloy wire melts, it can shrink into a ball and pull away from both ends to cut off t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H37/00H01H37/76H01H85/00H01H85/055H01H85/06
Inventor 乐海霞徐恺刘子岳
Owner BYD CO LTD
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