Xiaomi files solid-state EV battery patent with layered electrode design

Chinese tech giant Xiaomi has filed a patent for a solid-state battery featuring a novel layered electrode design aimed at addressing key challenges in ionic conductivity and energy density. The design incorporates multiple electrode layers around a current collector, with a solid polymer-metal salt electrolyte penetrating vertically to shorten ion travel distance and enhance performance. Xiaomi’s prototype boasts a cell-to-body (CTB) structure with a volume efficiency of 77.8%, a compact 120 mm battery pack height integrated into the vehicle floor, and delivers a CLTC-rated range exceeding 745 miles. It also supports fast charging, adding 500 miles of range in just 10 minutes. The design is reportedly compatible with existing lithium battery manufacturing lines, facilitating potential mass production and easing the transition to solid-state technology. Xiaomi’s move reflects growing momentum in the automotive industry toward solid-state batteries, which promise improvements in safety, energy density, and thermal stability compared to traditional lithium-ion cells. Major automakers like BMW, Toyota, SAIC, and battery