In new energy vehicles, the domain controller is an electronic control unit used to manage and coordinate the vehicle’s various electronic systems to enable various functions and optimize vehicle performance. It controls key components such as the battery management system, motor controller, and power converters to optimize energy efficiency and ensure precise control of power output. It also coordinates the braking system, suspension system, and powertrain to provide better vehicle stability and driving safety.

A smart key for new energy vehicles is a type of car key based on wireless technology and intelligent features, offering greater functionality and convenience compared to traditional mechanical keys. Smart keys typically allow users to unlock the car doors and start the engine without physically inserting a key. Through wireless signal recognition, the car doors automatically unlock when the smart key is near the vehicle, and the start button allows the engine to be started. The key also enables owners to remotely control certain vehicle functions—such as turning the headlights on and off, activating the air conditioning, and locking the doors—using buttons on the key.