CPC H01M 16/006 (2013.01) [H01M 8/04283 (2013.01); H01M 8/04313 (2013.01); H01M 8/04746 (2013.01); H01M 8/188 (2013.01)] | 20 Claims |
1. A device for managing a state of health of an electrolyte in a redox flow battery system comprising:
at least one rechargeable cell comprising a positive electrode, a negative electrode, and a separator positioned between the positive electrode and the negative electrode, a positive electrolyte tank comprising a positive electrolyte in fluid communication with the positive electrode in a primary positive electrolyte loop, and a negative electrolyte tank comprising a negative electrolyte in fluid communication with the negative electrode in a primary negative electrolyte loop;
a diffusion cell comprising a positive chamber and a negative chamber separated by a proton conducting membrane, the positive chamber in fluid communication with the primary positive electrolyte loop and the positive electrolyte tank in a secondary positive electrolyte loop, the negative chamber in selective fluid communication with the primary negative electrolyte loop and the negative electrolyte tank in a secondary negative electrolyte loop; and
a controller on the secondary negative electrolyte loop between the negative electrolyte tank and the negative chamber, the controller selectively allowing the negative electrolyte to flow to the negative chamber when a measured property is outside a predetermined operating range and preventing the negative electrolyte from flowing to the negative chamber when the measured property is within the predetermined operating range.
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