Xiaomi patents solid-state EV battery with a layered electrode design

Xiaomi, a multinational consumer and tech company headquartered in Beijing, has received a patent for a solid-state EV battery using a layered electrode design.

Xiaomi’s patent for a solid-state battery features a layered electrode structure designed to enhance ionic conductivity and energy density, reports CarNewsChina. The design integrates a current collector with multiple electrode layers composed of active materials, conductive agents, binders and a solid electrolyte made of polymers and metal salts. The solid electrolyte penetrates the electrode layer along its thickness, shortening ion transport paths to improve performance, particularly for fast-charging applications.

Xiaomi claims that the new technology is compatible with existing lithium battery manufacturing processes. And a prototype pack features a Cell-to-Body (CTB) design with 77.8% volume efficiency that has demonstrated a China Light-Duty Vehicle Test Cycle (CLTC)-rated range of 745 miles (1,199 km) and current fast charging systems can add 500 miles (805 km) worth of range to the battery in 10 minutes.

In addition, the battery pack measures only 4.7” (120 mm) in height, which could allow for better space utilization in on- and off-road battery-electric vehicles as well as for improved weight distribution.

Source: Xiaomi, CarNewsChina