Cylindrical lithium battery with protective function

Abstract

The invention discloses a cylindrical lithium battery with a protective function and aims to improve the using safety and reduce the using cost of the lithium battery. The cylindrical lithium battery comprises a cylindrical single lithium battery, a circular protective circuit board, a circular insulating gasket, an anode battery cap and a heat-shrinkable tubing, wherein the diameter of the circular protective circuit board is the same as that of the cylindrical single lithium battery; a piece is arranged on one surface of the circular protective circuit board, and the other surface of the circular protective circuit board adopts a cathode output end; at least one of a short-circuit protection circuit, an overcharge protection circuit, an over discharge protection circuit and an overcurrent protection circuit is arranged on the circular protective circuit board; the circular protective circuit board is connected with the anode and the cathode of the cylindrical single lithium battery through a nickel strap; the circular insulating gasket is arranged between one side of the circular insulating gasket, on which the piece is arranged, and the cathode end face of the cylindrical single lithium battery; the anode battery cap is arranged on the anode end face of the cylindrical single lithium battery in a spot welding manner; the circular insulating gasket is mounted on the anode battery cap; the external of the complete battery is packaged by the heat-shrinkable tubing. According to the invention, as the protection circuits are added, the using safety is improved.

Description

technical field [0001] The invention relates to the technical field of lithium batteries, in particular to a cylindrical lithium battery with protection function. Background technique [0002] Lithium-ion batteries have the advantages of high voltage, high specific energy, many cycle times, and long storage time. They are not only widely used in portable electronic devices such as mobile phones, digital cameras and laptop computers, but also widely used in electric vehicles, electric Large and medium-sized electric equipment such as bicycles and electric tools. [0003] Due to the design of the existing single lithium-ion battery's own structure, at present, the single lithium-ion battery itself does not have a protective function, but there are overcharge, over-discharge, over-current, short-circuit, etc. protect the circuit. When used in some small power reserve space, it is easy to cause the lithium-ion battery to be scrapped due to misuse. Due to the high energy and h...

AI Technical Summary

Problems solved by technology

When used in some small power reserve space, it is easy to cause the lithium-ion battery to be scrapped due to misuse

Due to the high energy and high price of lithium batteries, the batteries will be scrapped due to misuse, causing economic losses to users.

Images