US 11,929,534 B2
Method and system for redox flow battery performance recovery
Yang Song, West Linn, OR (US); Craig E. Evans, West Linn, OR (US); and Brady Thompson, Canby, OR (US)
Assigned to ESS TECH, INC., Wilsonville, OR (US)
Filed by ESS TECH, INC., Wilsonville, OR (US)
Filed on Oct. 14, 2020, as Appl. No. 17/070,852.
Claims priority of provisional application 62/931,117, filed on Nov. 5, 2019.
Prior Publication US 2021/0135269 A1, May 6, 2021
Int. Cl. H01M 8/18 (2006.01)
CPC H01M 8/188 (2013.01) 20 Claims
OG exemplary drawing
 
1. A method for a redox flow battery, comprising:
interrupting cycling of the redox flow battery, including,
charging the redox flow battery to a threshold charge condition,
draining positive and negative electrolyte from the redox flow battery,
circulating a wash solution through the redox flow battery, and
returning the positive and negative electrolyte to the redox flow battery, and
resuming cycling of the redox flow battery.