The automotive industry is undergoing a transformative shift towards sustainable and eco-friendly transportation, with electric vehicles (EVs) playing a pivotal role in this revolution. Among the many components contributing to the efficiency and safety of electric vehicles, power relays stand out as critical elements in their electrical systems.

Relays are widely used in electric vehicles to control high current loads. Because of the low cost and excellent fault immunity of solid state relays, it is a useful and reliable solution in the automotive application environment.

Relays can be used in different parts of the electric car. For example, the horn buttons are installed on the steering wheel. In order to protect the button contacts, there are generally horn relays to protect the main circuit. In order to improve reliability, all kinds of lights use relays to work together to control the high current circuit of lights. In order to protect the ignition switch and prolong its life, a starting intermediate relay is used to control the main circuit of the starter. When a diesel vehicle is cold started, a glow plug is used to help start, and the glow plug is generally protected by a relay. There are also door control relays, compartment lighting relays, power main relays, etc.

Safety is paramount in electric vehicles, and relays contribute significantly to this aspect. In the event of a fault or emergency situation, relays can quickly disconnect the power supply, preventing potential hazards and ensuring the safety of the vehicle occupants and surrounding environment. This feature is particularly important in EVs where high-voltage systems are present, requiring rapid response mechanisms for potential risks.

Moreover, relays play a vital role in managing charging processes in electric vehicles. As EVs continue to gain popularity, efficient and reliable charging infrastructure is crucial.  Relays facilitate the connection and disconnection of the charging cable, ensuring a smooth and secure charging process. Additionally, they help protect the battery by managing the charging current and voltage, contributing to the longevity and performance of the electric vehicle.