...
In rev 2, a "fuel-gauge" IC was added (to measure the SoC more accurately)
V2 Requirements - 2023/06/25
Disconnect aux batt if battery voltage falls below certain threshold
monitor battery using fuel gauge (& send info to MCU)
power horn (x1) and fans (x2?)
supply power to main power switch relay
supply power to LV in the case of BPS fault
Maybe requirements:
supply power to BPS on startup ???????
power itself ????????
(regulation requirements for reference)
...
Reading Material
https://www.edn.com/designing-battery-management-systems/
...