BMW is testing solid-state batteries

BMW is testing solid-state batteries

Since 2022, the BMW Group and the company Solid Power have been investing together in the development of ASSB solid-state batteries (all-solid-state batteries) as part of their technology transfer agreement. The advantages of ASSB technology: higher energy density in a very compact storage compared to today's technologies. John Van Scoter, President and Chief Executive Officer of Solid Power, is excited about the next milestone: “Solid Power is very proud that our partnership with BMW has resulted in the first demonstration of true solid-state battery cells in a vehicle.” Martin Schuster, Vice President Battery Cell and Cell Module at the BMW Group says: "Our BMW i7 ASSB test vehicle on the road is a perfect example of the BMW Group's technology-open mindset. We are continually pushing forward the development of new battery cell technologies and are constantly deepening our know-how with valuable partners such as Solid Power."

Valuable insights

The concept battery integrated in the BMW i7 test vehicle combines proven Gen5 construction principles (prismatic cells in modules) with new, innovative module concepts for integrating ASSB cells from Solid Power. The management of cell expansion will be investigated here. In addition: how is the operating pressure controlled and how the temperature boundary conditions are adjusted. The use of Solid Power cells with sulfide-based electrolytes and their complete integration into a battery pack will provide the BMW Group with further important findings in the test program in the coming months. The innovative cells were developed and manufactured by Solid Power in collaboration with experts from the BMW Group. In order to realize ASSB technology in a competitive overall storage system, further development steps are required.