Compared to traditional lithium-ion cells, the new sulphide-based solid-state battery will have energy densities between 400 and 500 Wh/kg, or two to three times higher.
In an effort to improve its energy storage, Huawei has submitted a patent application for a battery with a 3,000-kilometre range and a five-minute charging time. Compared to traditional lithium-ion cells, the new sulphide-based solid-state battery will have energy densities between 400 and 500 Wh/kg, or two to three times higher.
The invention proposes doping sulphide electrolytes with nitrogen to increase electrochemical stability and address problems like side reactions at the lithium interface.
Huawei has shown an increasing interest in upstream battery components even though it does not produce power batteries. Earlier in 2025, the company filed a separate patent application for the manufacturing of sulphide electrolytes, a vital material that is costly and sometimes more costly than gold because of its strong conductivity.
Huawei’s claims of a 3,000-kilometre range and a five-minute charge have drawn a lot of attention, but experts warn that these figures are only theoretical and would require charging infrastructure that is not yet commercially available.
According to CarNewsChina, the business still faces a few obstacles. Interfacial resistance still limits efficiency even though ionic conductivity is generally lower in solid electrolytes than in liquid ones. Furthermore, the high production costs, which are currently between 8,000 and 10,000 yuan per kWh (about 1,100–1,400 USD), often prevent mass-market adoption.