Pre-charging circuit protection design
Because there are a large number of capacitive loads at the input end of the high-voltage equipment controller, directly connecting the high-voltage main circuit may cause high-voltage shocks. High voltage devices are precharged.
Overload/short circuit protection design for high voltage equipment
When the high-voltage accessory equipment of the car is overloaded or the line is short-circuited, the relevant high-voltage circuit should be able to automatically cut off the power supply to ensure that the high-voltage accessory equipment is not damaged and ensure the safety of the car and the passengers. Therefore, overload or short-circuit protection components should be installed in the design of high-voltage systems, such as insurance and contactors in relevant circuits. Comprehensive judgment is made with the effective command of the relevant control contactor closing. If a relevant circuit fault is detected, the high-voltage management system will send out an audible and visual alarm to remind the driver.