China has more solid-state battery patents than anyone else, yet still fears falling behind for one reason: Japan

China leads in the volume of solid-state battery patents and publications, but Japan still has the edge in international filings, portfolio quality, and industrial coordination.

Toyota remains the key IP leader, while Chinese firms like CATL, BYD, SVOLT, Gotion, and Ganfeng are rapidly advancing prototypes and production plans.

Several Chinese players are targeting limited testing around 2027 and broader deployment by 2030, as competition to industrialize the technology intensifies.

The outcome could reshape EVs, electronics, and energy storage, with patent and manufacturing leadership setting the pace for the next decade.