How to view spot welding and laser welding？

Spot welding technology has always been the preferred process for lithium battery assembly, especially suitable for nickel busbars and cylindrical batteries. The principle is to fuse the metal through rapid electrical pulses, forming a firm contact while minimizing thermal damage to the surrounding area.

 

Why choose spot welding?

 

• Verified by mass production, this process is fast, stable, and cost-effective, making it an ideal choice for large-scale manufacturing of electric vehicles and consumer batteries.

 

• Suitable for nickel - it performs particularly well on common nickel busbar materials in battery packs.

 

We specialize in precision spot welding equipment to ensure repeatable high-quality welding for both small lithium-ion batteries and large electric vehicle battery packs.

 

Laser welding achieves extremely high precision by melting and connecting materials through a focused beam of light. For prismatic batteries and pouch batteries, this process is the preferred solution due to its strict tolerance requirements and clean welds.

 

When is laser welding applicable?

 

• Aluminum welding - Unlike spot welding, laser welding can efficiently process aluminum materials.

 

• Applicable scenarios - Suitable for thin metal busbars, with aluminum busbars being the most common.

 

• Applicable battery types - prismatic batteries and pouch batteries are the most common. Partial cylindrical batteries can also be laser welded. This mainly depends on the characteristics of the battery casing and the positive and negative electrode materials.

 

However, the initial investment cost of laser systems is relatively high, and the operation requires more professional technical knowledge.

1) Processing nickel based cylindrical batteries: spot welding is the best choice - economical, efficient, and time tested.

 

2) Facing aluminum shell or soft pack batteries: laser welding is undoubtedly the preferred solution.