A battery protection device and protection method

Abstract

The invention discloses a battery protection device and a protection method, wherein the protection device includes a casing, and the material of the casing is a heat-conducting insulating material; a conductive sheet, a shrapnel and a metal wire are arranged on the inside of the casing, the conductive sheet contacts the shrapnel, and the shrapnel One end of the metal wire is fixedly connected, and the other end of the metal wire is fixed on the shell; the metal wire is made of memory alloy; there are two wires on the outside of the shell, one is electrically connected to the conductive sheet, and the other is connected to the shrapnel Electrical connection; the protection method uses the protection device to absorb the heat of the battery, electrically connects one wire to the positive pole of the battery, and the other as the positive output wire of the battery. After the battery heats up, the memory alloy is deformed, the battery positive pole is disconnected from the battery positive output wire, and the battery positive pole is short-circuited; when the battery cools down, the memory alloy is restored, the battery positive pole is connected to the battery positive output wire, and the battery positive pole is put into use. Therefore, the invention effectively protects the battery, and has low cost, sensitive induction, small volume and convenient use.

Description

technical field [0001] The invention relates to the technical field of battery protection, in particular to a battery protection device and a protection method. Background technique [0002] At present, in the electronics industry, lithium batteries are used more and more widely, so battery safety issues are becoming increasingly prominent. In view of the above-mentioned technical problems of battery safety, the measures currently taken are mainly to set up a triple protection mechanism in the single lithium-ion battery. One is to use switching elements. When the temperature inside the battery rises, its resistance value will rise accordingly. When the temperature is too high, the power supply will be automatically stopped; the other is to choose an appropriate separator material. When the temperature rises to a certain value, The micron-sized pores on the separator will automatically dissolve, so that lithium ions cannot pass through, and the internal reaction of the batte...

AI Technical Summary

Problems solved by technology

[0003] However, in the long-term use process, it is found that the battery heating or even explosion caused by the short circuit of the external circuit of the battery is an important risk and hidden danger.

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