Attractive laser welding solutions for e-mobility

The heart of the car

Precise battery production

Strength, electrical conductivity and tightness

For very small components such as the round cell, the prismatic battery cell or the pouch cell, the focus is on the precise and accurate production. The laser works without contact and is a safe tool for this. With low and locally limited heat input, distortion-free seams are created. The quality of each individual welded battery contact is monitored online. The laser welding process is therefore extremely stable.

One of the most critical errors in the contacting of the individual battery cells to cell models are called "false friends": Seen purely visually, the weld seam looks good, but there are no electrical contacts. The detection of these faults is therefore essential.
In the following step, individual battery modules are combined in battery boxes. Due to desired weight reductions of car bodies, these are made of high-strength aluminum alloys of the 5xxx and 6xxx series. Hot cracks are the biggest challenge at this point. For this reason, the use of high-precision monitoring systems is essential for the low-crack and low-pore laser welding of aluminum structures.

Stator production

Laser welding of hairpins

Reproducible copper welding with minimal spatter

For electric mobile drive technology, the series production of electric traction motors is to be made possible in a flexible manner and in large quantities. This requires high-precision, process-stable systems. In the production of so-called hairpins, hairpin-like copper wires are inserted into grooves, twisted and laser-welded. The monitoring of the copper welding process leads to reproducible and high-quality welded joints. A high bonding cross section, minimum spattering and the reduction of pore formation are achieved.

Solutions for measuring the layer thickness of Hairpin copper wires before paint stripping as well as the downstream high-precision measurement of the Hairpins provide further information regarding quality and efficiency.

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CHRodocile CLS | CLS HS

Fuel cell

Laser welding of bipolar plates

Tight welding of complex structural channels

The central task in the production of fuel cells is the gas-tight laser welding of components such as bipolar plates. These are made of stainless steel or titanium and have a complex structure of channels in which liquids or gases are transferred. By using process monitoring systems, conclusions can be drawn about the tightness of the plates. Defects such as humping, burn-through or insufficient welding depth are reliably detected and thus guarantee the quality of the weld. 

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MiniCutter CHRodocile CLS | CLS HS

In the world of copper

Power electronics

Spatter reduction

When manufacturing small components such as connections or plugs for power electronics, the focus is on precise and accurate contacting. Green and blue laser sources are suitable for laser welding of copper. Spatter is extremely unpleasant when laser welding copper components for power electronics. Particles cause short circuits and thus render the components unusable. Reliable detection of spatter during laser welding, control of the welding depth and monitoring of the welding process itself is an essential part of process monitoring systems.

Laser welding of lightweight construction materials

Bodywork made easy

The lightweight construction opens up new possibilities in the automotive industry. Topics such as weight and cost savings are increasingly leading to the use of high-strength aluminium alloys of the 5xxx/6xxx series. In the production of electric cars, for example, battery boxes and associated cooling structures as well as the underride guard are welded with high-precision laser welding. Intelligent and automated monitoring systems ensure that the weld seam is optimally shaped at high welding speeds, joints are low in cracks and pores and components are absolutely leak-proof.