Advantages of Laser in Lithium Ion Battery Welding Process

There are many reasons why Laser is suitable for the battery welding process. As we all Know, lasers are highly focused, concentrated beams of light. When integrated with automation, and suitable optics, the beam size, power, intensity, direction can be precisely controlled, so we get precise control over the energy output and the overall process.

These properties of Laser make it suitable for Welding batteries.

1. Freedom of welding dissimilar material combinations:

 Lasers can be used for welding of various dissimilar material combinations found in battery contacts such as Al-Cu, Cu-Al, Cu-Ni coated steel, Al-Ni coated steel etc. This gives lasers an edge of ultrasonic or resistance spot welding methods.

2. Penetration:

While battery welding, weld must penetrate entirely through the busbar and halfway through the terminal,if it goes any further, the impact may reach inside the chemicals and it may cause overheating, chemical reactions, and damage the battery or also cause harm. Laser, being a precisely controlled process helps to solve this problem, and we get the exact penetration required. So, we get excellent weld quality without having to worry about damaging the battery.

3. Temperature:

Similar to above, we also need to maintain the temperature range up to which our workpiece is heated, if the temperature is below required range, it is not enough to melt the material and form the weld and if it is above required, it may cause explosion. Ability of a Laser Battery welding machine to have precise control over energy output and heat helps maintain required temperature range.

4. HAZ:

In the Laser Welding process, heat input is lower than other welding processes, so the Heat Affected Zone is less. That is why, the distortion due to thermal effects is the least.

5. Contact less Process:

Being a Non Contact process, there is no wear and tear in the Laser Battery Welding Machine.

6. Speed:

When integrated with automation, it is a high speed process which enhances efficiency and productivity.

7. Focused:

Laser beam is a highly focused beam, we can get spot size in microns. So, it is possible to weld in small areas.

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