quantumscape backed by bill gates and volkswagen has said it has contracts with six electric vehicle makers including volkswagen automotive cells co a venture between mercedesbenz stellantis and totalenergies has an agreement to develop solidstate batteries with taiwanbased battery maker prologium technology ford and bmw have invested in usbased startup solid power which is producing prototype batteries hyundai motor another solid power investor has said it plans to mass produce solidstate batteries by 2030 tesla has not detailed solidstate battery development plans the ev market leader has been focused on the rollout of more powerful 4680 cells for its cybertruck and other vehicles