Temperature fuse capable of being soldered through reflow

Abstract

The invention relates to a temperature fuse capable of being soldered through reflow, which comprises a shell and two metallic electrodes, wherein the shell can be used for containing a low-temperature alloy, and the low-temperature alloy is connected with the end heads of the two electrodes. The temperature fuse is characterized by also comprising an upper cover, wherein the upper cover is used for stopping the low-temperature alloy from being fused, the shell is a frame-shaped shell, the metallic electrodes are respectively arranged at the bottom or at both sides of the frame-shaped shell, a space of 0.5 to 2.5mm is left between the electrodes, the low-temperature alloy is filled in the frame-shaped shell, the length and width sizes of the low-temperature alloy are smaller than or equal to the inner length and width of the frame-shaped shell, the thickness size of the alloy is smaller than or equal to the depth of the frame-shaped shell, and the upper cover is buckled and pressed on the low-temperature alloy. The invention also relates to a manufature method of temperature fuse. By removing the upper cover of the temperature fuse, the pressurized state above the low-temperature alloy is released, the temperature inducing and fusing functions of the fuse are activated, the temperature fuse is convenient to manufacture, and the qualified rate of finished products is improved.

Description

technical field [0001] The invention relates to a thermal fuse capable of reflow soldering and a manufacturing method thereof. Background technique [0002] In recent years, the communication industry has developed day by day, especially in the aspect of radio communication, the market of mobile phones has been popularized to almost everyone has a mobile phone. 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 further increase in battery capacity of mobile phones. The capacity has surged from 600mAh in the past to the current maximum of 3600mAh. The explosive power of such a high-capacity battery It can be seen. [0004] At present, most mobile phone batteries only rely on over-current protection, that is to say, th...

AI Technical Summary

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, a common disadvantage of thermal fuse products is that they can only be welded by local welding methods such as spot welding and laser welding, and reflow welding cannot be used, and the product cannot realize chip components.

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