Beijing-headquartered multinational technology conglomerate Xiaomi has secured a significant patent for a solid-state electric vehicle (EV) battery, featuring an innovative layered electrode design. This development marks a strategic advancement for Xiaomi as it deepens its foray into the competitive EV market, promising enhanced energy density and superior fast-charging capabilities crucial for next-generation electric mobility. The patent underscores a growing industry focus on solid-state battery technology as a key enabler for longer-range, quicker-charging electric vehicles.

According to reports from CarNewsChina, Xiaomi's patented solid-state battery design integrates a current collector with multiple electrode layers. These layers are composed of active materials, conductive agents, and binders, all permeated by a solid electrolyte made of polymers and metal salts. This unique structure allows the solid electrolyte to penetrate the electrode layer along its thickness, critically shortening ion transport paths. This design innovation is engineered to significantly improve ionic conductivity and overall battery performance, particularly benefiting fast-charging applications by reducing internal resistance and heat generation.

Xiaomi asserts that this new technology is fully compatible with existing lithium-ion battery manufacturing processes, a crucial factor for scalable production and cost efficiency. A prototype battery pack, incorporating a Cell-to-Body (CTB) design, has demonstrated impressive specifications. This CTB architecture achieves a volume efficiency of 77.8%, optimizing space utilization within the vehicle chassis. Performance testing indicates a China Light-Duty Vehicle Test Cycle (CLTC)-rated range of 1,199 kilometers (approximately 745 miles). Furthermore, the battery boasts remarkable fast-charging capabilities, reportedly able to add 805 kilometers (500 miles) of range in just 10 minutes using current fast-charging systems.

The physical dimensions of the battery pack also present a notable advantage, measuring only 120 millimeters (4.7 inches) in height. This compact profile offers greater flexibility for vehicle designers, enabling better space utilization in both on-road and off-road battery-electric vehicles. Such a low-profile design can also contribute to improved weight distribution, enhancing vehicle dynamics and safety. This patent positions Xiaomi not just as an EV manufacturer but as a potential innovator in core EV component technology, signaling a broader ambition within the clean energy sector.