US 11,699,909 B1
Controllers for managing a plurality of stacks of electrochemical cells, and associated methods
Seth Marshall Kahn, San Francisco, CA (US); Corrado Cammi, Mountain View, CA (US); Anthony John Stratakos, San Anselmo, CA (US); and Rainer Johannes Fasching, Mill Valley, CA (US)
Assigned to Element Energy, Inc., Menlo Park, CA (US)
Filed by Element Energy, Inc., Meno Park, CA (US)
Filed on Feb. 9, 2022, as Appl. No. 17/650,472.
Int. Cl. H02J 7/00 (2006.01)
CPC H02J 7/0013 (2013.01) [H02J 7/007 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A method for managing a plurality of stacks of electrochemical cells, the plurality of stacks being electrically coupled in parallel in a battery, the method comprising:
operating the plurality of stacks to execute a global operating strategy of the battery;
controlling one or more first power converters to change operation of one or more first stacks of the plurality of stacks to execute a first local operating strategy for determining one or more of (a) open circuit voltage of the one or more first stacks and (b) leakage current of the one or more first stacks; and
controlling one or more second power converters to change operation of one or more second stacks of the plurality of stacks to compensate for change in operation of the one or more first stacks caused by executing the first local operating strategy for determining one or more of (a) open circuit voltage of the one or more first stacks and (b) leakage current of the one or more first stacks, and thereby maintain the global operating strategy of the battery while executing the first local operating strategy.