a lithium battery

Abstract

The name of the invention is a lithium battery. It belongs to the technical field of lithium primary batteries. It mainly solves the problems in existing lithium batteries that the bottom of the battery case is easy to bulge and deform, and the sealing of the liquid injection hole is easy to damage the metal glass sealing part. Its main features are: including a battery case, a positive pole, a cover plate, lithium metal, a separator, a positive electrode and an electrolyte; the battery case is cylindrical, and the bottom thickness of the battery case is 1mm; the cover plate and the positive electrode The columns are sealed and connected by glass; the separator is a cylinder that separates the positive electrode from the lithium metal, and the positive electrode column penetrates the positive electrode; the cover plate or the bottom of the battery shell is provided with a liquid injection hole, and the outer port of the liquid injection hole is sealed . The invention has the characteristics of increasing the strength of the battery against internal pressure and preventing the impact force from damaging the metal glass seal of the battery when the liquid injection hole is sealed. It is mainly used for lithium source batteries such as lithium thionyl batteries, lithium sulfur dioxide batteries and lithium manganese dioxide batteries. Battery.

Description

technical field [0001] The invention belongs to the technical field of lithium primary batteries, and in particular relates to a lithium battery structure. Background technique [0002] The shell of the lithium primary battery is composed of a battery shell and a cover that includes a metal glass seal. The battery shell is generally stretched into a cylindrical shape with a stainless steel strip or a low-carbon steel strip by stamping and stretching, and then cut. Due to the small thickness of the bottom of the battery case, when the internal pressure of the battery is too large, the bottom of the battery case is easy to bulge and deform, and the conventional design is that there is a liquid injection hole on the cover for filling electrolyte, which needs to be sealed after filling , Excessive pressure during sealing will cause great damage to the glass sealing part, resulting in liquid leakage. According to the conventional design, it is difficult to design liquid injection...

AI Technical Summary

Problems solved by technology

[0002] The shell of the lithium primary battery is composed of a battery shell and a cover that includes a metal glass seal. The battery shell is generally stretched into a cylindrical shape with a stainless steel strip or a low-carbon steel strip by stamping and stretching, and then cut. Due to the small thickness of the bottom of the battery case, when the internal pressure of the battery is too large, the bottom of the battery case is easy to bulge and deform, and the conventional design is that there is a liquid injection hole on the cover for filling electrolyte, which needs to be sealed after filling , Excessive pressure during sealing will cause great damage to the glass sealing part, resulting in liquid leakage. According to the conventional design, it is difficult to design liquid injection holes on the steel shell to meet the reliability requirements. People have long wanted unresolved problems

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