Waterproof and anti-explosion electric quantity display device for lithium ion battery

Abstract

The invention relates to a waterproof and anti-explosion electric quantity display device for a lithium ion battery. The existing electric quantity display device for batteries has no waterproof and anti-explosion functions and accordingly reduces safety performance of the batteries. The waterproof and anti-explosion electric quantity display device comprises a battery cover and an electric quantity display mechanism, wherein the electric quantity display mechanism is fixed at the bottom of the battery cover. The waterproof and anti-explosion electric quantity display device is characterized by further comprising a check safety valve and a valve rod, wherein the electric quantity display mechanism comprises a circuit board, a light-emitting diode (LED) lamp and a switch button. The LED lamp is installed on the circuit board and matched with the battery cover, and the switch button is connected with the circuit board. A button hole with a through hole structure is arranged in the valve rod, and the valve rod is fixed in the battery cover, the button hole is sleeved on the switch button. The check safety valve is covered on the valve rod and forms a unidirectional channel, and the top of the switch button is matched with the check safety valve. The waterproof and anti-explosion electric quantity display device is reasonable in design and good in safety performance and has the waterproof and anti-explosion function.

Description

technical field [0001] The invention relates to a power display device, in particular to a waterproof and explosion-proof power display device for lithium ion batteries, mainly used in the field of lithium ion storage batteries. Background technique [0002] During the use, storage and maintenance of the battery, it is necessary to easily judge the state of charge of the battery. Usually, various methods are used to display the state of charge of the battery. For example, the state of charge of the battery can be indicated by LED lights. When pressing When the switch button is pressed, the indicator light is on, which can display the charging status of the battery. However, the general display method destroys the sealing property of the battery, or uses a complicated sealing method. [0003] At present, there are also some power display devices specially used in batteries. For example, in a Chinese patent with a publication date of January 21, 2009 and a publication number ...

AI Technical Summary

Problems solved by technology

[0004] However, when the battery is charging, thermally expanding, or even having an internal failure, the internal gas needs to be discharged in time to prevent the battery from exploding, and external water and other substances are not allowed to enter the interior of the battery. None of the power display devices have waterproof and explosion-proof functions, which reduces the safety performance of the battery

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