Efficient battery production process capable of avoiding wiping of liquid injection opening and realizing direct welding of sealing piece

Abstract

The invention discloses an efficient battery production process capable of avoiding the wiping of a liquid injection opening and realizing the direct welding of a sealing piece. A transition glue nozzle is inserted into the liquid injection opening, and electrolyte overflowing in a primary liquid injection process and a secondary liquid injection process is retained in the transition glue nozzle, so that the cleanliness around the liquid injection opening of a battery shell is improved. According to the efficient battery production process of the invention, the transition glue nozzle is placed at the liquid injection opening of the battery shell, and the electrolyte is injected into the battery shell through the transition glue nozzle, so that the periphery of the liquid injection opening of the battery shell is not polluted by the electrolyte after the liquid injection work is completed, the wiping process is reduced, the overall working efficiency is improved, and the requirement of improving the productivity is met.

Description

technical field [0001] The invention relates to the technical field of automatic production of lithium batteries, in particular to an efficient battery production process in which a wipe-free liquid injection port can be directly welded to a sealing sheet. Background technique [0002] Lithium batteries are a type of batteries that use lithium metal or lithium alloys as positive / negative electrode materials and use non-aqueous electrolyte solutions. With the development of microelectronics technology in the 20th century, miniaturized equipment is increasing day by day, which puts forward high requirements on power supply, and lithium battery components are popularized along with it. With the development of science and technology, lithium batteries have become the mainstream. In the production process of lithium batteries, it is necessary to inject the electrolyte into the casing through liquid injection equipment, then perform chemical formation, and then perform secondary ...

AI Technical Summary

Problems solved by technology

However, after the liquid injection is completed, there will be problems of electrolyte overflow or contamination around the liquid injection port, which needs to be wiped, but in the existing liquid injection equipment, it is usually wiped by a wiping mechanism, which is easy to leave a small amount of electrolyte residue around the injection port

After chemical formation and secondary injection, the residual electrolyte will crystallize, making it difficult to clean through the wiping mechanism, requiring manual wiping, which is inefficient and not suitable for high-speed automated production

Therefore, after the second liquid injection, laser cleaning is usually required, but the residual electrolyte cannot be completely cleaned, and dust is easily generated

When welding the sealing sheet, the yield rate can only be maintained at 97%-98% due to the residual electrolyte, which cannot be further improved.

At the same time, due to the problem of electrolyte residue, only pulse welding can be used instead of continuous optical fiber welding with higher efficiency, resulting in low production efficiency

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