Butterfly welding equipment

Abstract

The invention discloses butterfly welding equipment. The equipment comprises: a welding platform and a positioning platform, wherein the positioning platform can horizontally act on the welding platform, a welding pressure head is arranged on the positioning platform, and a laser flow guide channel is arranged on the welding pressure head; a first flow guide channel communicated with the laser flow guide channel and used for introducing inert gas; and a second flow guide channel communicated with the laser flow guide channel and used for discharging inert gas and welding slag. The welding platform is further provided with a pressing plate capable of relatively moving up and down, and the pressing plate is provided with a laser protective cover in butt joint with the laser flow guide channel and a smoke and dust removal pipe in butt joint with the second flow guide channel. In order to solve the technical problem that the quality of a battery cell welded by butterfly welding is not high, the invention provides the butterfly welding equipment which has the effects of cooling, heat dissipation, oxidation prevention and over-welding prevention, further prevents shrinkage of a battery cell diaphragm, effectively avoids the phenomena of aging of a tab sealing ring, battery cell liquid leakage and the like, and improves the welding yield and the battery safety.

Description

technical field [0001] The invention relates to the technical field of lithium batteries, in particular to a butterfly welding device. Background technique [0002] The main core components of the aluminum shell battery include the battery cell, the aluminum shell, the cover plate, the electrolyte, the connecting piece, the PET film, the adhesive tape, etc. The performance and safety of the battery cell are self-evident, and the assembly quality of the battery cell directly Determine battery safety, electrical performance (capacity, energy, internal resistance, etc.) and electrochemical reaction, the battery assembly method mainly directly affects the quality of dry battery assembly, ultrasonic welding quality, laser welding quality and related raw material quality decisions. [0003] In addition, with the development of the industry and the requirements of national new energy-related standards, the demand for battery energy density is getting higher and higher. Lithium batt...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the technical problem that the quality of the electric cores for butterfly welding is not high, the present invention provides a butterfly welding equipment. During welding, the welding pressure head is equipped with a protective gas (referring to an inert gas), and the laser beam directly hits the welding surface. The protective gas function of the welding head can cool down and dissipate heat, prevent oxidation, avoid over-soldering, and then prevent the cell diaphragm from shrinking, effectively avoiding the aging of the lug seal ring and the leakage of the cell, and improving the welding yield and battery safety

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