I am looking at including a traction battery monitor on the controller board.
Here are 2 options
1. Monitor the whole battery pack voltage using a linear optocoupler cct fed to an a/d input of the atmega. This would be used to shut off the main contactor or reduce motor current when minimum pack voltage is reached. This would not take into account low voltages on individual cells.
2. Use a commercial battery management system with an alarm output that operates a digital input on the controller to reduce motor current when any cell reaches it's minimum voltage.
What does everybody think?
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