Chinese telecom giant Huawei has filed a patent for a sulfide-based solid-state battery that claims to deliver a driving range of up to 3,000 kilometers (about 1,860 miles) with full charging in just five minutes.
The patent details an innovative battery architecture with energy densities between 400–500 Wh/kg—two to three times greater than current lithium-ion cells. It also describes nitrogen-doping of sulfide electrolytes to stabilize the lithium interface and reduce side reactions that typically degrade battery performance.
Though Huawei does not manufacture power batteries, it has increasingly entered upstream battery research. In early 2025, the company also filed a patent for sulfide electrolyte synthesis—a costly yet high-conductivity material critical to solid-state battery performance.
Industry experts caution that the bold range and fast-charging claims remain theoretical. They emphasize that charging infrastructure and mass production solutions are not yet available. Solid electrolytes still face challenges like low ionic conductivity, high interfacial resistance, and steep production costs—between 8,000–10,000 yuan (~US $1,100–1,400) per kWh.
Huawei’s patent submission has reinforced China’s position at the forefront of next-generation battery development. The country now accounts for around 36.7% of global solid-state battery patent filings, with about 7,600 annually. Companies like CATL are also progressing toward pilot solid-state production by 2027.
Traditional industry leaders—Toyota, Panasonic, Samsung—have long pursued solid-state breakthroughs. Toyota introduced a prototype in 2023 with a 1,200 km range and 10-minute charging, with commercialization anticipated mid-decade. Huawei’s aggressive patent ambitions are intensifying global competition in the race for ultra-fast, long-range batteries.
Despite commercial hurdles ahead, Huawei’s move signals a strategic push into battery innovation. If its theoretical performance can be realized, the battery could redefine electric mobility by addressing range anxiety, dramatically shortening charge times, and enhancing energy independence.
