Steel shell lithium battery provided with spiral linear anti-explosion valve and manufacturing method of steel shell lithium battery

Abstract

The invention discloses a steel shell lithium battery provided with a spiral linear anti-explosion valve and a manufacturing method of the steel shell lithium battery. The steel shell lithium battery comprises a shell, wherein a sealed space is formed in the shell, a battery cell is arranged in the shell, the shell comprises a positive electrode shell and a negative electrode shell, an insulating glue layer is arranged between the positive electrode shell and the negative electrode shell, and the positive electrode shell and the negative electrode shell are insulated and sealed through the insulating glue layer; the battery cell is connected with the positive electrode shell through a positive electrode lug and is connected with the negative electrode shell through a negative electrode lug; and the positive electrode shell or the negative electrode shell is provided with a linear anti-explosion valve, and the linear anti-explosion valve surrounds the positive electrode shell or the negative electrode shell and is spiral. Equivalently, a plurality of small anti-explosion valves are arranged at different positions and different angles of the whole steel shell lithium battery, so that the safety and the anti-explosion effect of the steel shell lithium battery are improved, and the greater safety problem caused by battery explosion can be effectively avoided.

Description

technical field [0001] The invention relates to the technical field of steel-case lithium batteries, in particular to a steel-case lithium battery provided with a spiral linear explosion-proof valve and a manufacturing method thereof. Background technique [0002] In the prior art, in order to prevent the steel case lithium battery from exploding, an explosion-proof valve is usually provided above or below the battery case, and the explosion-proof valve can also be called a safety valve; The pressure value that other parts of the battery can withstand, when the internal pressure of the steel case lithium battery is abnormal, causing the internal pressure to rise abnormally to a certain extent, the explosion-proof valve will be compressed by the internal pressure and cause the explosion-proof valve to be destroyed. Therefore, the internal pressure of the steel-case lithium battery can be released in time to prevent the steel-case lithium battery from exploding due to excessiv...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the shape of the explosion-proof valve is O-shaped, C-shaped, cross-shaped, or a single device. When the steel-cased lithium battery is squeezed, internally or externally short-circuited, resulting in high-temperature expansion, due to the steel-cased lithium battery Only a single part is equipped with an explosion-proof valve. During the irregular expansion or movement of the internal battery core, the internal battery core may block the explosion-proof valve, and explosions often occur due to the failure of the explosion-proof valve.

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