Welding vs Crimping for Current Over 200A

# Welding vs Crimping for Current Over 200A

## Core Conclusion

Crimping is the preferred choice for current above 200A, with welding as an auxiliary option. Only high-power laser welding applies to narrow and irregular terminals; ordinary soldering and spot welding cannot withstand heavy current.

## Performance Comparison

1. **Heat Generation**

Crimping features compact contact surface and low resistance, resulting in slight temperature rise under heavy current. Weld joints tend to have voids, which easily cause overheating and burnout at 200A.

2. **Vibration Resistance**

Crimped connections are mechanically locked, resistant to vibration and tension, ideal for drone and power battery applications. Welded solder is brittle and prone to cracking under frequent vibration.

3. **Conductivity Stability**

Crimping delivers stable performance and low voltage drop. Common welding has inconsistent quality and risks arcing under high current.

4. **Cost & Efficiency**

Crimping ensures high production efficiency and low rework rate. Welding costs more labor with lower yield.

## Application Scope

- Above 200A: Copper lug crimping, terminal pressing and busbar connection

- Limited narrow space: High-power laser welding

- Not applicable: Common soldering and low-power spot welding

## Selection Advice

Crimping is recommended for power batteries, heavy-duty drone wires and energy storage cables. Adopt laser welding only when crimping is structurally unfeasible.