BMS and active-balancing boards

Scope

• Altium schematic and layout for an SSR active-balancing hat board (V1, December 2024 — with Christopher Reid and Samuel Breslin) and the BMS.
• Protection: over/under-current, voltage, temperature.
• Trip conditions programmed in C++ and brought up on the vehicle.

Monitor IC	TI BQ76952
ADCs	ADS7138
Primary cells	16
Pack thermistors	20 primary
Cell voltage window	2.50–4.20 V
Current trips	50 A discharge / 26 A charge
Temperature trips	45 °C charge / 60 °C discharge

Limits above are from the bms_config struct in the Car-IV firmware.