Thin structure of anti-pressure over-temperature protection element

Abstract

The invention discloses a novel thin compressive overtemperature protection element structure which comprises an insulating slot body and a metal area, wherein the operating temperature of the structure is 70-120 DEG C; the upper surface and the lower surface of the insulating slot body are in symmetric structures, and are provided with periphery bulges; low-lying areas are formed in the middles of the upper surface and the lower surface; two discontinuous metal areas are arranged in each low-lying area; the two metal areas of the upper surface are connected by a low-melting-point alloy; the low-melting-point alloy is coated with a fluxing agent; tin coatings are arranged on the metal areas; the metal areas of the upper surface and the lower surface are communicated by blind holes of the insulating slot body; the total thickness of the tin coatings and the low-melting-point alloy coated with the fluxing agent is not greater than the depth of the low-lying areas of the insulating slot body; the upper surface of the insulating slot body is covered with an insulating layer; the insulating layer covers the tin coatings and the low-melting-point alloy coated with the fluxing agent on the insulating slot body to form a fuse; and the thickness of the fuse is less than 0.7mm. The structure is ultrathin and high in compressive capacity.

Description

technical field [0001] The invention relates to an over-temperature protection thin component structure for electronic products, in particular to a thin-type pressure-resistant over-temperature protection component structure applied to lithium ion batteries that can be charged and discharged many times. 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] However, during the rapid development of the market, frequent quality problems occurred, such as mobile phone battery explosions all over the world, Nokia recalling 46 million batteries made by Panasonic, etc., making the safety of mobile phone batteries a focus. In addition, with the develop...

AI Technical Summary

Problems solved by technology

[0005] Thin thermal fuses are developing rapidly as the main over-temperature protection component of mobile phone batteries. Looking at all existing thin thermal fuse products and their patents, there are two common problems: (1) The insulation area of ​​thin thermal fuses is not resistant to external pressure, Poor rigidity; (2) Most recoverable thermal fuses are large in size and complex in structure

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