US Patent 10914212 48V electrically heated catalyst system for a vehicle

A method is provided for powering a 48V electrically heated catalyst of a catalytic converter of a vehicle without using a 48V battery. The method provides a 12V battery. An electrical energy storage device is electrically connected between the electrically heated catalyst and the 12V battery. The electrical energy storage device is charged by the 12V battery so as to store a voltage of 12V that can then be switched to 48V. The electrically heated catalyst is powered with 48V supplied by the charged electrical energy storage device. A system for performing the method is also disclosed.