Square shell of lithium battery or power lithium battery

Abstract

The invention relates to a square shell of a lithium battery or a power lithium battery. The square shell is a square cavity with one end opened, a safety wire is arranged on a side surface of the cavity and is internally sunken from the surface of the cavity, a surface, which is expanded when the lithium battery is failure, is right corresponding to an inner wall, of a side wherein the safety wire is pressed, of the shell, thus, the inner wall of the cavity of the square shell is extruded and the safety wire also begins to be torn outwards when a chemical material in the battery begins to be failure and is expanded outwards; when the inner wall is extruded to a certain extent, the safety wire will be broken to achieve effects of pressure relief and explosion prevention; and in such a case, the reaction time of the safety wire which is broken is short, a user is easy to found that the battery begins to be failure or not from appearance when the shell is extruded outwards, at the moment, the lithium battery can be timely replaced, and thus, the safety of the lithium battery or the power lithium battery is improved. Therefore, the square shell is more reasonable in structure and higher in safety performance.

Description

technical field [0001] The invention relates to a power lithium battery. Background technique [0002] We know that lithium batteries can be used for pressure relief and explosion protection by setting safety aluminum foil or safety wire. The safety aluminum foil or safety thread of the traditional lithium battery is set on the sealing plug of the shell. When the positive and negative electrodes of the chemical materials in the lithium battery fail, a large amount of gas is generated, and the gas slowly diffuses in the shell. When the gas pressure in the shell reaches To a certain extent, the aluminum foil can be burst or the safety wire can be split open to relieve pressure and prevent explosion. Therefore, the explosion-proof action can only be achieved when the air pressure in the traditional lithium battery reaches its peak value, so its response to pressure relief and explosion protection is slow. And the user can't find out whether the battery starts to fail from the ...

AI Technical Summary

Problems solved by technology

The safety aluminum foil or safety thread of the traditional lithium battery is set on the sealing plug of the shell. When the positive and negative electrodes of the chemical materials in the lithium battery fail, a large amount of gas is generated, and the gas slowly diffuses in the shell. When the gas pressure in the shell reaches To a certain extent, the aluminum foil can be burst or the safety wire can be split open to relieve pressure and prevent explosion. Therefore, the explosion-proof action can only be achieved when the air pressure in the traditional lithium battery reaches its peak value, so its response to pressure relief and explosion protection is slow. Moreover, the user cannot find out whether the battery has begun to fail from the surface of the casing, which leads to the low safety of the current lithium battery

For the plug with safety aluminum foil, the inner core material of the battery is likely to block the explosion-proof hole where the aluminum foil is located, resulting in loss of explosion-proof effect

Images