Electrical

Inside a Battery Management System (BMS)

Electrical Diagrams · made in Skemio

Block diagram of a Battery Management System showing cell series taps, NTC thermistors, an analog front end, MCU, balancing shunts, and primary contactors.
Block diagram of a Battery Management System showing cell series taps, NTC thermistors, an analog front end, MCU, balancing shunts, and primary contactors.
Open it in SkemioMake your own

What it shows

  • Sense lines tap each cell series boundary to measure millivolt shifts.
  • Passive shunts bleed excess charge through resistors as thermal waste.
  • Main contactors disconnect under load within milliseconds of faults.

The takeaway

BMS protects pack health by bleeding high cells and isolating faults instantly.

More electrical diagrams