Third, the application functions mainly include high-voltage power-up and power-off, low-voltage power-on and power-off, AC charging and DC charging, battery system thermal management, and battery system fault diagnosis.
Among them, high-voltage power-on and low-voltage power-on and power-off require other controllers, such as the cooperation of VCU and BMS. After the BMS completes high-voltage power-on, it can supply power or charge to the high-voltage load of the vehicle (there are also manufacturers with high integration, BMS can handle the power-on and power-off process by itself).
AC charging is to charge the power battery through an AC charging pile and on-board charger; DC charging is to charge the power battery through a DC charging pile. The charging function has relevant national standards. Battery thermal management is mainly to ensure that the battery is in a reasonable temperature range and that the charge and discharge functions are in the best state.
The fault diagnosis section contains a lot of content, and the safety of the battery depends on this section, including over-voltage and under-voltage protection, over-current protection, relay stickiness detection, battery pressure difference protection, and other functions.
Highfive BMS implements the following functions: