Erik discusses BMS safety and fault management. He looks at the conditions the BMS monitors, using a system diagram to understand cell voltage reporting. Using a chart with voltage and temperature, Erik explains the safe operating area for the battery pack cells. The BMS monitors the minimum safe temperature, maximum safe operating temperature, minimum safe voltage and maximum safe voltage, depending on chemistry. The BMS will work to keep battery cells within the safe operating area and report any faults that threaten overtemperature or overcharge, which can lead to thermal runaway. The BMS will also prevent overdischarge or under temperature that can also threatened the battery cell.
The BMS manages the cell performance and communicates this information to the external application. The BMS can also disconnect the from the external application to protect the battery pack to prevent unsafe operation, triggering a fault.
