Is BYD dmi an expired patent of Toyota?

No, according to car home's inquiry, the current BYD dmi technology can be traced back to F3dm around 2008, and now it is an improvement of F3dm or an optimization and innovation based on it, so BYD dmi is BYD's own technology. BYD brand was born in Shenzhen and was founded in 1995. Its business spans four major industries: automobile, rail transit, new energy and electronics.