Response to detection of an overdischarge event in a series connected battery element

A microprocessor-implemented response system for an exceptional charge event including an overdischarge of a particular one battery element in an energy storage system having a plurality of series-connected battery elements, comprising:

• a first charge imbalance detection system monitoring, using the microprocessor, the energy storage system for a charge imbalance using a first detection modality, said first charge imbalance detection system initiating a reduction of said charge imbalance using a first response modality;
• a second charge imbalance detection system monitoring, using the microprocessor, the energy storage system for the overdischarge of the particular one battery element using a second detection modality different from said first detection modality;
• and
• a remediation system initiating a response to said overdischarge using a second response modality different from said first response modality, said response decreasing a risk associated with said overdischarge;
• wherein said first detection modality includes a measurement of a voltage level of each battery element of the plurality of battery elements establishing a plurality of voltage imbalances between individual ones of the plurality of battery elements;
• wherein said first response modality includes adjusting said voltage levels to reduce said plurality of voltage imbalances;
• and
• wherein said second detection modality includes a statistical evaluation of a parameter of each battery element.