Fully automatic vacuum capper for square lithium ion battery and its capping method

Abstract

The invention discloses a square type lithium cell full automation vacuum capper that includes rack, high speed pressure unit, cell clamp and steel ball distributing device which is between the high speed pressure unit and cell clamp; the steel ball distributing device includes pin guiding unit of the press pin and steel ball distributing unit; the pin guiding unit includes several press pins; the steel ball distributing unit includes giving ball plate which can horizontal shift, several steel ball holes which are corresponding with said press pins are set on the giving ball plate; the other limit position of the giving ball plate is that the steel ball holes are corresponding with steel ball storehouse mouth; the pin guiding unit, cell storehouse and the press pin are separately shift under the drive of movement unit; using the cell sealing craft of the capper, when the steel ball is given and the press pin is pressed to seal, the cell is always in vacuum condition. It avoids the phenomenon of rebound of cell thickness and tympanites, and guarantees perfect vacuum and reliable tightness.

Description

technical field [0001] The invention relates to a battery sealing device and a sealing method thereof, in particular to a lithium ion battery sealing device and a sealing method thereof. Background technique [0002] With the development of miniaturization of portable electrical appliances, prismatic lithium-ion batteries, which occupy less equipment space and are more convenient to manufacture, are widely used. At present, the production process of a square lithium-ion battery is usually: winding of the pole piece group - the pole piece group is put into the shell - welding of the electrode and the battery cover - seamless welding of the battery shell and the cover - injection of electrolyte - formation ——Vacuum sealing——Manual sealing——Secondary formation——Cleaning. Since there is no equipment suitable for sealing square lithium-ion batteries with mature technology, the vacuum sealing method involved in the above-mentioned production process still adopts a simple and orig...

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the technical problems of poor pre-sealing vacuum degree in the process of producing square lithium-ion batteries in the prior art, and the inability to accurately control the sealing height in the secondary manual sealing, thereby causing electrolyte leakage, battery thickness rebound and swelling after sealing, and provides A fully automatic vacuum sealing machine and sealing method for a square lithium-ion battery that ensures no deformation of the battery, high vacuum, and reliable sealing

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