What are the battery module welding parameter indicators?

1. Welding material parameters

Material type: aluminum sheet, copper sheet, nickel sheet, etc. Different materials have different welding performance and requirements. For example, aluminum and copper sheets cannot be directly laser welded, and adapters are required, while copper-nickel sheet laser welding can only be applied to materials with nickel sheet thickness below 0.5mm.

Material thickness: The thickness of the material will affect the energy demand and welding effect of welding. For example, aluminum sheets can be welded 3-4mm, copper sheets can be welded more than 1mm, and nickel sheets can be welded more than 2mm.

2. Welding process parameters

Welding method: such as continuous laser welding, CMT welding, etc. Different welding methods are suitable for different materials and welding requirements.

Welding energy: The energy of laser welding directly affects the welding depth and welding quality. It needs to be adjusted according to the type and thickness of the material.

Welding speed: The welding speed will affect the width and depth of the weld, as well as the strength and toughness of the welded joint. It is necessary to increase the welding speed as much as possible to improve production efficiency while ensuring the welding quality.

3. Welding quality indicators

Weld quality: The dimensions of the weld, such as excess height, width, and length, need to meet certain standards. At the same time, the weld needs to be free of defects such as pores and cracks to ensure the strength and sealing of the welded joint.

Welding pass rate: The welding pass rate is one of the important indicators to measure welding quality. Strict testing and quality control measures are needed to improve the welding pass rate. 

4. Equipment performance parameters

Equipment efficiency: The efficiency of the entire line needs to meet certain standards to meet production needs. For example, the entire line efficiency of the battery module laser welding production line requires the battery cell processing beat ≥ 8 ppm and the entire line beat ≥ 1 module/120S (based on 8 batteries per module).

Equipment load-bearing capacity: The equipment needs to be able to withstand a certain weight to ensure the stability and safety of the equipment during the welding process.

Noise control: The noise generated by the equipment during operation needs to be controlled within a certain range to protect the hearing health of the operator.

5. Other parameters

Safety: The equipment needs to be equipped with safety measures such as safety guards and emergency stop devices to ensure the safety of the operator.

Maintainability: The equipment needs to be easy to maintain and maintain to reduce downtime and repair costs.

In summary, the battery module welding parameter indicators involve multiple aspects, and the appropriate parameter values need to be determined according to the specific welding requirements and material types. At the same time, strict testing and control measures are also required to ensure welding quality and production efficiency.