According to Huawei, they have created a ground-breaking solid-state EV battery that can provide more than 3,000 kilometres of driving range between charges. It is said that this battery may be fully recharged in just five minutes. The battery uses a nitrogen-doped sulphide electrolyte, which significantly increases energy density to 400–500 Wh/kg—two to three times higher than that of existing lithium-ion batteries, according to the company’s recently filed patent. A 0–100% charge can be achieved in five minutes thanks to the fast-charging feature.
Stabilising the lithium interface and reducing hazardous side reactions are now two of the largest challenges facing the commercialisation of solid-state batteries. According to Huawei’s patent, these problems are resolved by nitrogen-doping sulphide electrolytes.
Industry analysts warn that although the test results are encouraging, it is still improbable that mass-produced EVs would be able to achieve such performance at this time. Another significant obstacle is the high cost of production; sulphide electrolytes alone cost over $1,400 per kWh (₹1.2 lakh). Furthermore, there is currently insufficient infrastructure to enable such ultra-fast charging.
Although Huawei does not yet produce power batteries, its large investments in battery materials and research suggest that it hopes to play a major role in the industry. Notably, the 3,000+ km range is based on the CLTC (China Light-Duty Vehicle Test Cycle); under the EPA cycle, this would decrease to around 2,000 km, which is still far more than the current mainstream EVs in the world.
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