Vehicle-mounted energy storage system and electric vehicle

The invention provides a vehicle-mounted energy storage system and an electric vehicle, and belongs to the technical field of energy storage, and the system comprises a main battery pack which is electrically connected with high-voltage electric equipment through a main battery pack contactor and an output end contactor in sequence; the electromagnetic cross-linking part comprises an input coil and an output coil matched with the input coil; the voltage conversion device comprises an AC-AC conversion device or a DC-AC conversion device, and the AC end of the voltage conversion device is electrically connected with the output coil; the AC end of the AC-DC conversion device is electrically connected with the input coil, and the DC end of the AC-DC conversion device is electrically connected with the main battery pack through the wireless electric energy transmission contactor and the main battery pack contactor in sequence. By adopting the voltage conversion device, the electromagnetic crosslinking component an