Dynamic beam lasers may provide the automotive industry with a technological solution for economically mass-producing clean energy engines through an increased feed rate for bipolar welding, according to recent findings from the Eureka Project, based at Fraunhofer Labs in Aachen, Germany.
Electric cars require a fuel cell stack built of approximately 200 bipolar plates.
As the automotive industry shifts to e-mobility, manufacturers are also shifting from combustion engines to fuel cell engines. The challenge to efficiently produce fuel cells lies in welding the bipolar plates -- thin plates of just hundreds of microns. Each cell contains 300 to 400 plates with a weld seam of 3 to 6 meters. While there are many efforts to increase welding speed to keep up with demand, increasing the feed rate to more than 0.5 m/sec results in welding defects, leading to faulty parts and a backlog of materials.
The three companies driving the Eureka Project -- Civan Lasers in Israel, the Fraunhofer Institute for Laser Technology in Germany, and Smart Move in Germany -- are international leaders in the field of laser welding. They aim to solve the welding problem by implementing Civan Lasers' dynamic beam laser technology, which can wobble the beam in MHz frequencies, creating a faster, more accurate weld of the bipolar plates.
First 3D Dynamic Beam Laser cutting and welding machine
In response to these findings, Dr. Eyal Shekel, Civan's CEO, shared, "We are confident that the unique capabilities of the dynamic beam laser will be able to solve this challenge."
Dr. Alexander Olowinsky, a researcher with Fraunhofer ILT, added, "We look to reach a breakthrough in this project by using advanced sensors and complex beam shapes in high frequencies that were not available in the past."
As testing continues, it is becoming clear that dynamic beam lasers could be the game-changing solution for fuel cell engine manufacturers.
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