BYD plans to build about 1,000 electric vehicles fitted with solid-state batteries in 2027, according to company executive Stella Li. The small initial run is intended to test the technology before any wider deployment. The project also involves FinDreams, BYD’s battery subsidiary, and uses a sulfide-based solid electrolyte.
The company’s longer-term aim is to use solid-state batteries in most of its electric vehicles by 2030. A new flagship from BYD’s Yangwang brand, previewed in a teaser and positioned to challenge Rolls-Royce, could be the first model to receive the technology; the article does not identify a specific vehicle name.
Solid-state cells could store more energy than conventional lithium-ion batteries for the same weight and size, while eliminating liquid electrolyte may reduce some safety risks. Scaling production remains difficult: solid materials need consistent contact inside cells, and moisture can disrupt battery operation. BYD produced batteries with 194.8 GWh of capacity in 2025, equivalent to 16.4% of the global market, but that experience does not guarantee success with a different technology. Toyota is targeting series production in 2027–28, CATL expects limited production in 2027 and larger-scale output around 2030, while Mercedes has tested an EQS prototype that reportedly covered about 1,200 km without recharging.