Low-melting point alloy wire and temperature fuse adopting the same

A thermal fuse and alloy wire technology, applied in emergency protection devices, electrical components, circuits, etc., can solve the problem of high resistivity of alloy wire, achieve the effect of improving the accuracy of fusing temperature and eliminating the uncertainty of fusing temperature
CN101197230AActive Publication Date: 2008-06-11BYD CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
BYD CO LTD
Publication Date
2008-06-11

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Abstract

The invention relates to a low molten point alloy wire and a temperature fuse using the alloy wire, wherein the temperature fuse comprises two electrode sheets (1), an insulation bottom film (21) and an insulation upper film (22), a flux (3) and a low motel point allow wire (4). Two electrode sheets (1) are positioned on the insulation bottom film (21). Two ends of the low motel point alloy wire (4) are respectively connected with two electrode sheets (1). The molten flux (3) is coated on the low motel point alloy wire (4) and is coated with the insulation upper film (22). The mass percentages of the low motel point alloy wire (4) include: 50 percent to 56 percent In, 30 percent to 38 percent Sn, 6 percent to 15 percent Bi and a small quantity of Ag, Cu, and Zn. The flux (3) is constituted by rosin, stearine acid, liquid alcohol and small molecule acid. The temperature fuse of the invention can work for longer time on 8A current, thereby improving the blow-out temperature accuracy of the temperature fuse at the same time.
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Description

Technical field

[0001] The invention belongs to the technical field of circuit protection, in particular to an alloy sheet-shaped thermal fuse used in a notebook computer battery. technical background

[0002] Various electronic and electrical products often cause circuit damage due to overcurrent, overheating, etc. during use, thereby affecting the normal use of the product. Existing electronic products such as mobile phones and digital cameras mostly use lithium-ion batteries. In order to ensure the safety of lithium batteries, most lithium batteries are equipped with thermal fuses. When the above situation occurs, the thermal fuse is blown to protect the circuit and the product. Generally, the fuse is a low melting point alloy wire wrapped with a flux.

[0003] If the electrical device equipped with the fuse generates heat abnormally, the heat released will melt the low melting point alloy wire. When a certain amount of alloy wire transforms into the liquid phase, the liquid m...

Claims

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