Protection element

Abstract

The invention relates to a protection element. The protection element comprises a substrate, an upper electrode, a lower electrode, a terminal electrode, a metal block and a solder layer. The upper electrode is arranged on a first surface of the substrate and is provided with a third sub-electrode and a fourth sub-electrode. The lower electrode is arranged on a second surface of the substrate. The terminal electrode is connected with the upper electrode and the lower electrode. The metal block is arranged on the first surface of the substrate and is connected with the third sub-electrode and the fourth sub-electrode. The solder layer is arranged between the metal block and the third sub-electrode and between the metal block and the fourth sub-electrode. The protection element can effectively prevent overcurrent and overvoltage and is very practical.

Description

technical field [0001] The invention relates to a protection element applied in an electronic device, in particular to a protection element capable of preventing overcurrent and overvoltage. Background technique [0002] In recent years, information technology has advanced by leaps and bounds. Information products such as mobile phones, computers, and personal mobile assistants can be seen everywhere. People's dependence on information products is increasing day by day. However, recently there are often news about the batteries of portable electronic products such as mobile phones exploding during charging and discharging. Therefore, the industry has begun to strengthen protection measures for batteries during charging and discharging to prevent the batteries from exploding due to overvoltage or overcurrent during charging and discharging. [0003] The protection method of the protective element proposed in the prior art is to connect the thermal fuse in the protective ele...

AI Technical Summary

Problems solved by technology

[0005] However, since the surface of the insulating layer 130 is almost flat, there is little difference between the maximum height H1 of the electrode layer 160 relative to the substrate 110 and the maximum height H2 of the insulating layer 130 relative to the substrate 110, and the molten metal layer 140 still has a certain viscosity

Therefore, the molten metal layer 140 is not easy to flow, so that the heater 120 cannot effectively fuse the metal layer 140, and cannot meet the requirements of overvoltage protection.

[0006] This shows that above-mentioned existing protective element obviously still has inconvenience and defect in use, and urgently needs to be further improved

In order to solve the above-mentioned problems, the relevant manufacturers have tried their best to find a solution, but no suitable design has been developed for a long time, and generally there is no suitable design that can solve the above-mentioned problems. This is obviously the relevant industry. Urgent problem

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