How does resistance spot welding work?

When using resistance spot welding, careful consideration of the current path between the electrodes must be considered. The electrons will always flow along the path of least resistance, thus as the tabs get thicker, the energy will travel directly between the electrodes with little to no energy at the desired interface.

Can a laser be used for battery module welding?

Laser welding is significantly faster showing the allure of the laser for battery module welding. Cycle time can be reduced even further with the use of a galvo scanning system, where some motion is handled by quick motions in the galvo head, and then indexed after all cells within the welding field are addressed.

Can laser welding be used in EV battery production?

Of these, laser and ultrasonic welding processes dominate in EV battery manufacture – with laser welding the preferred solution for mass production – and continue to be improved and refined. “We see a lot of laser welding and ultrasonic wedge bonding for the larger packs,” says Boyle at Amada Weld Tech.

How does resistance welding work?

Resistance welding passes an electric current between a pair of electrodes and though the materials to be joined, relying on the heat generated by ohmic resistance to melt and fuse them. It is a proven and relatively cheap process, but has limitations in the applications and geometries to which it is suited.

Do welding processes need a power source?

Traditionally, welding processes in the construction sector have relied on conventional power sources, presenting a myriad of challenges. From erratic power supply to high operational costs and environmental concerns, the limitations of these traditional solutions have been evident.

What types of welding do EV batteries need?

“In these situations, cooperative development and reliable relationships are of high value.” While there many kinds of welding, in EV battery applications the most common are resistance welding and laser welding, along with ultrasonic welding and wire bonding, and benefit from standardisation for mass production.