The Precharge Relay for EV is primarily designed to address one of the most critical challenges in an electric vehicle’s electrical system: controlling the initial charging current when the battery is first connected to the electric motor or other high-voltage components. When a vehicle is powered on, the battery pack typically has a higher or lower voltage compared to the system it is connecting to. If this voltage difference is too high, it can cause a sudden surge of electrical current, which can potentially damage sensitive electronic components and circuits in the powertrain. The Precharge Relay mitigates this by initially limiting the current flow, allowing for a smoother voltage transition and reducing the risk of damage.