The overall goal of high-voltage electrical system control and safety management and fault diagnosis is to ensure the safety of high-voltage power consumption in the whole process of pure electric vehicles, including stationary, running and charging.
Safety Design of High Voltage Electrical System
According to the requirements of pure electric vehicle safety standards, and considering the aspects of on-board energy storage device, functional safety, fault protection, personnel electric shock protection and high voltage safety management and control strategy, the following four aspects should be designed for the high voltage system of electric vehicles.
High Voltage Electromagnetic Compatibility Design
Since there is a high-voltage AC system on a pure electric vehicle, which has strong electromagnetic interference, the power line and signal line should be isolated or separately wired as much as possible when designing the high-voltage wiring harness; the two ends of the power line should be considered to be isolated and grounded to prevent the grounding loop from forming a common Impedance coupling couples noise to the signal line; input and output signal lines should avoid being arranged together to cause interference; input and output signal lines should be avoided on the same connector as much as possible, if it cannot be avoided, the input and output signal lines should be staggered.