Redox flow battery with floating power module under imbalanced charge conditions

• Main Authors: BEVERAGE, Kevin Hartley, HOLMQUEST, Kyra Coffey, HAMEL, Jonathan
• Format: Patent
• Language: English
• Published: 14.09.2023
• Subjects: BASIC ELECTRIC ELEMENTS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; SYSTEMS FOR STORING ELECTRIC ENERGY

REDOX FLOW BATTERY WITH FLOATING POWER MODULE UNDER IMBALANCED CHARGE CONDITIONS The present disclosure is directed, in certain embodiments, to a flow cell battery system. A battery management system detects that a first power module and a second power module located adjacent to the first power module are operating at different states of charge. After determining that the second power module is at the lower state of charge than the first power module, a negative-side switch associated with the second power module is adjusted to an open position, thereby preventing flow of electrical current from a negative terminal of the second power module to electrical ground. 206b- . Closed During Charge Open During -- 206a T To Eletrolyte Tanksr -- 126 Shutdown 20 220b__________ <220a 208 - - 202A 20-4b - .. .. ... z - '-f--204a Iu~ 204b I ... ... 204a .. ...Iu I IaI - I I .. . .. . . +200 :216-n > 20-4b ... ... .. I I .. ... ...