Voltage Detection and Troubleshooting
The power source of pure electric vehicles is the power battery, and the voltage of the power battery has a great relationship with its discharge capacity and discharge efficiency. When the power battery voltage is at a low voltage, it is still discharged with a large current, which will damage the high-voltage electrical equipment and seriously affect the service life of the battery. When the voltage is detected to be too high or too low, the relevant circuit should be cut off in time. Therefore, in order to ensure the safety of electrical appliances, power batteries and drivers and passengers of pure electric vehicles when the power battery is low voltage, it is necessary to design a voltage detection circuit for real-time and accurate detection of the working voltage of the high-voltage circuit system and safe and reasonable fault handling
Due to the influence of the running road environment and the driver’s control, the running state of the car will change at any time, and the discharge current of the power battery will change significantly with the driver’s control. When the current exceeds the preset allowable range, it will cause excessive temperature rise, which not only affects the life of the battery, but also causes abnormal reactions in extreme cases, causing damage to automotive power devices and endangering the safety of the automotive high-voltage system.