Cylindrical Battery Parts 21700 Battery Cap

Difficulties in welding: The material is thin, easy to burn through, and the strength is not reached.

Solution: Control the consistency of incoming materials; design clamps with excellent performance and controls the clamping gap; use small-core fiber lasers and use galvanometers for high-speed (above 300mms) welding.

Module

Difficulties in welding: high penetration requirements and poor weld formation.

Solution: Choose a laser fiber core of 50μm~100μm, and use higher power for high-speed (above 80mms) welding.

Difficulties in welding the liquid injection hole, flip piece, pole, and explosion-proof valve of square battery components: there are many pores, which are prone to explosion points, resulting in insufficient sealing.

Solution: Improve the cleanliness of the parts to be welded; use a fiber laser with a 50μm core, and the welding speed can be increased appropriately.

Shell seal

Difficulties in welding: there are many pores and explosion points are prone to occur, resulting in insufficient sealing.

Solution: Improve the cleanliness of the parts to be welded; use a fiber laser with a 50μm core, and the welding speed can be increased appropriately; use a small core fiber laser + semiconductor laser for composite welding.

Difficulties in welding: The four corners of the square weld are easy to burn through, resulting in insufficient sealing.

Solution: Choose a welding platform with better acceleration performance; use a higher welding speed to shorten the laser irradiation time at the corner.

Welding difficulties: uneven weld formation and insufficient processing efficiency.

Solution: Use small core fiber laser + semiconductor laser for hybrid welding.

Busbar

Difficulties in welding: The material is thin, and multiple pieces are easily welded together, resulting in insufficient strength and poor conductivity.

Solution: Control the flatness of incoming materials; design clamps with excellent performance and control the clamping gap. Difficulties in welding: Insufficient width of weld connection leads to insufficient strength. Solution: Choose a small core fiber laser and use swing welding.

Side panels

Difficulties in welding: there are many welding parts and high efficiency requirements.

Solution: Choose high-power fiber laser for remote scanning welding.

Soft connection

Difficulties in welding: The material is thin, and multiple pieces are easily welded together, resulting in insufficient strength and poor conductivity.

Solution: Control the flatness of incoming materials; design clamps with excellent performance and control the clamping gap.

Difficulties in welding: Insufficient width of weld connection leads to insufficient strength.

Solution: Choose a small core fiber laser and use swing welding.