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Fusing agent and temperature fuse containing the same

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

Active Publication Date: 2008-06-11
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 prepared according to the following process: Weigh 6g stearic acid into 10g n-butanol, put it in a thermostat at 120°C until it dissolves, then add 40g ordinary rosin, stir and mix evenly, and put it into the heating furnace Heat it in the medium until it boils, take it out and add 1 g of glacial acetic acid until it cools to room temperature, spot the above flux on the cover film with a dispenser, and ultrasonically weld it to form.

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

[0028] According to the components of the thermal fuse, the thermal fuse is prepared and packaged.

Embodiment 2

[0030] Weigh 6.5g stearic acid into 10g n-butanol, put it in a thermostat at 120°C until it dissolves, then add 30g ordinary rosin, stir and mix evenly, put it in a heating furnace and heat it until it boils, take it out and add 1g The glacial acetic acid was cooled to room temperature until it was cooled to room temperature.

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

Embodiment 3

[0033] Weigh 7g stearic acid into 10g n-butanol, put it in a thermostat at 120℃ until it dissolves, then add 30g ordinary rosin, stir and mix evenly, put it in a heating furnace and heat it until boiling, take it out and add 1g ice Acetic acid until it is cooled to room temperature, and other preparation processes are the same as in Example 1. After placing the flux 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 the protection of electronic products, in particular to a thermal fuse containing the flux for the protection of 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 circuit damage due to overcurrent, overheating, etc. during use, thereby affecting the normal use of the product. The same goes for lithium-ion batteries that are widely used today. Therefore, in order to ensure the safety of the lithium battery, a temperature safety element is provided on the lithium battery. When the above situation occurs, the thermal fuse is blown to protect the circuit and the product. Flux must be added to the thermal fuse to ensure that when the alloy wire is melted, it can shrink into a ball and pull it apart to cut off the current. In order to form an ov...

Claims

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Application Information

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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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