Battery Management System Functions (Flowchart of BMS Operations)

Imagine your EV battery pack as a powerful orchestra. To create beautiful music, all the instruments (battery cells) need to be in perfect harmony. The BMS acts as the conductor, ensuring everything runs smoothly.

Data Acquisition: The conductor constantly listens (measures) the volume (current), pitch (voltage), and mood (temperature) of each instrument (cell) and the entire orchestra (battery pack).
Cell Balancing: If a particular instrument gets too loud (high voltage) or quiet (low voltage), the conductor adjusts its settings to bring it back in tune, ensuring balanced playing (charging and discharging) for a longer performance (battery life).
State of Charge (SOC) & State of Health (SOH) Estimation: By listening to the overall sound, the conductor estimates how much power remains in the orchestra (SOC) and how well-rehearsed they are (SOH).
Thermal Management: The conductor keeps a watchful eye on the mood (temperature) of the orchestra. If things get too heated (high temperature), the conductor might adjust the performance space (cooling system) to keep everyone comfortable for optimal performance and safety.
Power Optimization: The conductor skillfully directs the flow of music (power) between the orchestra (battery pack) and the audience (vehicle), ensuring every note (energy) is used efficiently.
Communication: The conductor uses a special language (CAN bus) to communicate with the concert hall manager (Vehicle Management System) and other backstage crew (vehicle modules). This real-time communication ensures flawless performance (optimal vehicle operation).

1. Discharger
Cell #2
Cell #1
Battery Management System Functions
Flowchart of BMS Operations
Battery Pack
Current
Voltage
Temparature
Battery Management System
Cell Balancing
Measurement
State of Charge (SOC)
State of Health (SOH)
Thermal Management
Power Optimization
CAN bus Controller
Vehicle Management
System and other vehicle
modules
Real time
communication system