Electric vehicle battery high voltage power-on and power-off sequence
- Normal high voltage power-on sequence
The normal high-voltage power-on requirement starts from the key on/Crank and is completed within 1s. The DC/DC should be required to enter the working mode (buck) after the high-voltage power-on is completed, and the integrated power unit (IPU) should be required to enter the working mode (TorqControl) after the high-voltage power-on is completed. Table 1 shows the requirements for each time point of high-voltage power-on, and Figure 2 shows the normal high-voltage power-on sequence.
- Normal high voltage power-off sequence
The normal high-voltage power-off process starts from the key off, and each node completes the high-voltage power-off process within a few seconds. Table 3 and Table 4 shows the requirements for each time point, and Figure 5 shows the normal high-voltage power-off sequence.
- Emergency high voltage power-off sequence
Table 6 shows the requirements for each time point of emergency high-voltage power-off, and Figure 7 shows the emergency high-voltage power-off sequence.
It should be noted that, in the T6 time period, when the VCU requests the IPU to enter the emergency discharge mode, if the motor speed is less than 100rpm, the IPU enters the emergency discharge mode within 50ms; if the motor speed is not lower than 100rpm, when the motor speed drops to After 100rmp or less, the IPU enters the emergency discharge mode within 50ms.
