Battery overcharging automatic power-off device and battery with same

Abstract

The invention discloses a battery overcharging automatic power-off device and a battery with the same. The power-off device is overlaid on the battery and then electrically connected with the battery. The power-off device comprises an insulating frame, a conducting sheet and two conductive poles, wherein an annular space enclosed by frame sides is arranged in the insulating frame, one frame side is provided with two grooves which are opposite to each other, the opposite frame side is provided with a flexible plate which extends inwards, the tail end of the flexible plate is provided with an opening, and a blade part is formed in one side of the opening adjacent to the tail end of the flexible plate; the conducting sheet is folded in half and provided with two half pieces, a folding part is formed between the two half pieces, and the conducting sheet penetrates through the opening of the flexible plate, so that the two half pieces are arranged on the tail end of the flexible plate in a clamping mode and the folding part is opposite to the blade part; and the two conducting poles are respectively provided with a guide part and a connecting part which extends from the corresponding guide part, the two guide parts are respectively arranged in the two grooves, and the two connecting parts are respectively electrically connected and fixed with the two half pieces.

Description

technical field [0001] The invention relates to an automatic power-off device for a battery, in particular to a battery overcharge automatic power-off device and a battery with the overcharge automatic power-off device. Background technique [0002] Currently, with the popularization and high performance of mobile electronic devices, storage batteries with high energy density are expected. In this context, lithium-ion batteries that use electrochemically doped and dedoped carbon materials that can be used as negative electrode active materials for lithium, and that use lithium-containing transition metal compounds as positive electrode active materials are rapidly becoming popular. [0003] However, in this secondary lithium battery, if it is overcharged, it will form an overcharged state, and excess lithium ions will be extracted from the positive electrode, and excessive insertion of lithium ions will occur at the negative electrode to precipitate lithium metal. On the po...

AI Technical Summary

Problems solved by technology

[0005] However, although the above-mentioned lithium battery overcharge protection structure can protect the battery to a certain extent from overcharging, the components and circuits will inevitably cause damage and wear of some components and lose the original function when the components and circuits are used for a long time. function; and the mechanical safety protection device of the cylindrical hard-shell lithium battery cannot be used for the soft-shell lithium battery; and the above-mentioned various protective structures or devices are quite complicated and cumbersome in terms of the combination and configuration of components; Therefore, if the above-mentioned components or circuits are damaged, the battery can still be safely powered off, and the problem of high cost can be overcome with a simple structure, which is the problem to be solved by the present invention.

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