APPARATUS AND METHOD CONTROLLING SEQUENCINGS FOR MULTIPLE ELECTROLYTE STORAGE TANKS IN A REDUCTION-OXIDATION FLOW BATTERY

摘要

A flow battery system and method are provided. The flow battery system includes first and second storage tanks initially respectively storing first and second electrolyte and a battery stack that includes a half-cell configured to charge and/or discharge a positive or negative liquid electrolyte provided from the first and second storage tanks. Electrolytes returned from the battery stack are returned with a higher SOC when the selected mode indicates a charging mode and electrolytes are returned from the battery stack with a lower SOC when the selected mode indicates a discharging mode. The flow battery system and method control a defined sequence for a selected mode of one of charging or discharging of the first and second electrolytes to charge or discharge the first electrolyte before charging or discharging the second electrolyte, based on the selected mode.

主权项

1. A flow battery system comprising:
a first battery stack including a first half-cell configured to charge and/or discharge a positive or negative liquid electrolyte; a first feed system to provide electrolyte to the first battery stack, including at least a first storage tank initially storing a first electrolyte having a first state of charge (SOC) and a second storage tank initially storing a second electrolyte having a second SOC; a first return system to return one of the positive electrolyte or negative liquid electrolyte from the first half-cell of the first battery stack to one of the first storage tank and the second storage tank with a higher SOC during a charging of the first or second electrolytes and with a lower SOC during a discharging of the first or second electrolytes; and a controller to control a defined sequence for a selected mode of one of charging or discharging of the first and second electrolytes, so as to accordingly charge or discharge the first electrolyte before charging or discharging the second electrolyte based on the selected mode.