BMW has started testing an i7 EV equipped with a large-format solid-state battery pack.Solid-state batteries offer benefits like improved energy density, range, charging characteristics, and safety.The BMW i7 prototype is currently being tested in Munich and utilizes all-solid-state batteries.BMW aims to focus on its Gen6 batteries initially and doesn't foresee the need for solid-state technology in its EVs until the mid-2030s.