BYD, the world's second-largest EV battery maker, expects to launch its first electric vehicles powered by all-solid-state batteries in 2027. The Chinese EV giant's CTO of battery business, Sun Huajun, revealed this updated timeline at the 2nd annual China All-Solid-State Battery and Development Summit.

Between 2027 and 2029, BYD plans to use the new battery technology in a limited production demonstration phase. It expects large-scale adoption and mass production to begin around 2030. In the initial phase, BYD will use sulfide-based solid-state batteries, which offer longer lifespan, faster charging, and greater stability, mainly in higher-end vehicles.

BYD has been researching all-solid-state batteries since 2013 and has already verified the possibility of mass production with various cell systems, materials, and other supporting tech. Last year, it began testing solid-state battery cells with 20 Ah and 60 Ah capacity.

Despite this progress, BYD plans to continue making LFP batteries over the next 15 to 20 years due to supply and cost constraints. The all-solid-state batteries will initially be used in luxury models, such as BYD's Denza or Yangwang brands.

CATL, the top EV battery maker with a 37.9% market share, is also developing sulfide-based all-solid-state EV batteries and plans to begin producing them in small volumes in 2027.