Rotating Current Collector Welding for Uniform Battery Cell Laser Seams

The patent transitions from a static welding approach (stopping the rotating plate) to a dynamic welding approach (welding while rotating). The laser welder is positioned to weld the current collecting plate during its rotation, eliminating the need to stop the plate for welding. This dynamic approach maintains welding precision while significantly improving process efficiency by eliminating idle time.

The patent implements continuous welding action by welding the current collecting plate during its rotation rather than stopping it. The laser welder operates continuously as the plate passes through the welding position, eliminating the start-stop cycle. This continuous action removes the time delay associated with stopping and restarting the rotation, thereby improving productivity without sacrificing welding quality.

The patent employs feedback control by using an encoder to detect the rotation angle of the rotating plate and adjusting the laser output timing accordingly. The control unit receives feedback from the encoder about the actual rotation position and speed, then compensates for acceleration and deceleration effects by precisely controlling when the laser fires. This feedback mechanism ensures uniform welding quality even when rotation speed varies, while maintaining ease of operation.

The patent changes the timing parameter of laser emission based on the rotation angle detected by the encoder. By adjusting the laser output timing according to the actual rotation position and speed, the system compensates for variations caused by acceleration and deceleration. This dynamic parameter adjustment ensures consistent welding uniformity while allowing the rotary welder to operate with variable speeds for ease of operation.