Temperature fuse and manufacturing method thereof

Abstract

The invention relates to a temperature fuse and a manufacturing method thereof. The temperature fuse comprises metal conductive members, low-temperature fusible alloy and insulating films, wherein the fronts and the backs of the metal conductive members are connected by two layers of low-temperature fusible alloy, the surface of the low-temperature fusible alloy is coated with fluxing resin, the ends of the metal conductive members, the low-temperature fusible alloy and the fluxing resign are covered with the insulating films, an under layer of a middle insulating film separates the two layers of low-temperature fusible alloy and is connected with the metal conductive members. The manufacturing method of the temperature fuse comprises the following steps of: welding the metal conductive members on the middle insulating film and reserving gaps at the ends; welding the two layers of low-temperature fusible alloy on the fronts and the backs of the ends of the metal conductive members; coating the fluxing resin on the surface of the low-temperature fusible alloy; covering two insulating films on the middle insulating film and covering the ends of the metal conductive members, the low-temperature fusible alloy and the fluxing resign with the insulating films. The temperature fuse is suitable to working occasions with small size and large current and has the function approximate to the function of two fuses which are connected in parallel, is superior to two fuses which are connected in parallel in action consistency and has the advantages of small size and space and cost saving.

Description

technical field [0001] The invention relates to a temperature fuse for electronic products and a manufacturing method thereof, in particular to a temperature fuse element of a mobile phone battery. Background technique [0002] In recent years, the communication industry has developed day by day, especially in radio communication, the market of mobile phones has been popularized to almost everyone has one. The popularity of mobile phones has directly led to the expansion of the market for mobile phone components, especially mobile phone batteries. [0003] With the development of 3G (third-generation communication) technology, mobile phones are developing towards multi-functionality. Multi-functionality requires a further increase in the battery capacity of mobile phones. The capacity has surged from the previous 600mAh to the current maximum of 3600mAh (model DB736). Such a high capacity The explosive power of the battery can be seen. [0004] At present, most mobile phon...

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Problems solved by technology

[0005] Alloy type temperature fuse is a relatively reliable protection element, and it is non-recoverable. Although it has the disadvantage of only acting once, on the other hand, its safety is greatly improved. It is better not to use the battery whose thermal fuse is blown due to high temperature, because the probability of the thermal fuse blowing is very small under normal use environment.

[0006] However, with the development of miniaturization of electronic components, the size of the thermal fuse is also required to be smaller and smaller. The smaller the size, the normal operating current of the thermal fuse is also limited.

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