Anti-explosion device of lithium battery and lithium battery with anti-explosion device

Abstract

The invention discloses an anti-explosion device of a lithium battery. The anti-explosion device comprises a substrate and an anti-explosion mechanism arranged on the substrate, wherein the anti-explosion mechanism comprises a pressure release hole, a baffle plate, air inlet holes, connection holes, extrusion holes and an extrusion balloons; the substrate is provided with the air inlet holes on both sides of the baffle plate; one side which is close to the baffle plate of each connection hole is provided with an extrusion hole; the extrusion balloons are arranged on lower mounting sleeves. Theinvention further discloses a lithium battery. The lithium battery comprises a lithium battery body and an anti-explosion device of the lithium battery body, wherein the lithium battery body is fixedto the substrate through a screw. According to the anti-explosion device disclosed by the invention, the balloons are provided, and opening and closing of the pressure release hole are realized in cooperation with the baffle plate, so that anti-explosion pressure release can be performed; the balloons can be used repeatedly, have flexible structures, and are free from friction and abrasion, so that airtightness is not influenced; the anti-explosion device is very worthy of popularization; the anti-explosion performance of the lithium battery provided with the anti-explosion device can be improved better and more stably; the anti-explosion device is very effective.

Description

technical field [0001] The invention relates to the technical field of lithium batteries, in particular to an explosion-proof device for lithium batteries and a lithium battery with the explosion-proof device. Background technique [0002] Lithium-ion batteries are the power storage components of lithium batteries. When they are in use, due to factors such as charger failure and overcharging, abnormal gases will be generated along with the internal chemical reactions of the battery, resulting in excessive internal pressure of the battery, resulting in battery failure. The consequences of explosion accidents range from damage to equipment to serious injuries to users. Therefore, when the internal pressure of the battery is too high, in order to prevent the battery from exploding, the gas in the battery must be leaked. The protective measure is usually to install a protective device on the battery cover. [0003] In the prior art, the application number is "201710360653.4", a...

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Problems solved by technology

[0004] In the above two application documents, lithium batteries can be well protected against explosion, but there are still obvious defects: 1. The use of the explosion-proof diaphragm is disposable. When the diaphragm is broken by the high-pressure gas inside the battery , although the air pressure can be released inside the battery, it is necessary to replace the explosion-proof membrane, which is very troublesome and costly; 2. Use a ball valve for exhaust gas pressure relief. Contact friction, long-term use will cause wear to the ball valve itself, and when the wear degree is too high, it will lead to a decrease in air tightness and affect battery performance

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