Rotary welding positioning device of lithium ion cylindrical battery cover plate

Abstract

The invention provides a rotary welding positioning device of a lithium ion cylindrical battery cover plate. The rotary welding positioning device comprises a base, and a front clamping piece, a positioning assembly and a rear clamping piece are fixedly arranged on the central axis of the base in sequence, wherein the positioning assembly comprises an outer cylinder, at least two positioning plates are arranged inside the outer cylinder along the axial direction of the outer cylinder, and the back face of the positioning plate is fixedly connected with a cylinder wall of the outer cylinder through a spring; the positioning plate comprises a positioning plate body which the front surface is in an inwards-concave shape, the two ends of the positioning plate body are correspondingly connectedwith arc-shaped end plates extending towards the cylinder wall direction of the outer cylinder, and all the end plates are located outside the outer cylinder to form an outer trumpet shape; and a fixing part is fixedly arranged at the inner concave part of the positioning plate body, the fixing part comprises a hoop and a connecting rod, and freely-rotating balls are sleeved with the hoop. According to the device, the cylindrical battery with different diameters can be positioned in a floating mode, the rotating center of the cylindrical battery can be accurately positioned, so that the welding quality is improved; and a laser welding area is provided with a welding dust removal interface, so that the environmental pollution is reduced.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a rotary welding positioning device for a cover plate of a lithium ion cylindrical battery. Background technique [0002] At present, the laser welding process of the cover plate of the lithium-ion cylindrical battery is as follows: first assemble the aluminum shell of the battery and the cover plate together, then perform overall positioning of the battery, and then the laser emitting head welds the front and rear cover plates of the cylindrical battery at the same time, And the cylindrical battery is rotated to complete the battery aluminum case and cover plate. [0003] Since the laser emitting head remains still during the welding process, the cylindrical battery is rotated. Therefore, the positioning of the battery after the cover plate is assembled is very important. At present, the fixed V-shaped block is mostly used to position the battery, and then the m...

AI Technical Summary

Problems solved by technology

However, due to the deviation of the outer diameter of the aluminum shell of the incoming battery, the motor cannot accurately locate the rotation center of the battery during the battery rotation welding process. Occurrence of virtual welding, non-welding and other phenomena

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