US 12,191,548 B2
Hybrid redox fuel cell system
Yang Song, West Linn, OR (US); and Craig Evans, West Linn, OR (US)
Assigned to ESS TECH, INC., Wilsonville, OR (US)
Filed by ESS TECH, INC., Wilsonville, OR (US)
Filed on Sep. 2, 2022, as Appl. No. 17/929,623.
Claims priority of provisional application 63/261,406, filed on Sep. 20, 2021.
Prior Publication US 2023/0089941 A1, Mar. 23, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H01M 8/18 (2006.01); H01M 8/06 (2016.01); H01M 8/22 (2006.01)
CPC H01M 8/188 (2013.01) [H01M 8/0693 (2013.01); H01M 8/225 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A hybrid redox fuel cell system, comprising:
a hybrid redox fuel cell including an anode side through which a reductant is flowed and a cathode side through which a liquid electrolyte is flowed,
a trickle bed reactor including a catalyst bed fluidly connected to the cathode side, and
a plurality of flow control devices, each of the plurality of flow control devices comprising one or more of a control valve, a flow meter and a pressure regulator, the plurality of flow control devices comprising:
a first flow control device located between a reductant supply line, the reductant supply line fluidly connecting a reductant source and the anode side, and a reductant discharge line; and
a second flow control device located between a first oxidant supply line, the first oxidant supply line fluidly connecting an outlet of the catalyst bed and the cathode side, and an oxidant discharge line, the oxidant discharge line fluidly connecting the cathode side and an inlet of the catalyst bed;
wherein,
the liquid electrolyte includes a metal ion at a higher oxidation state and the metal ion at a lower oxidation state, and
power is generated at the hybrid redox fuel cell by reducing the metal ion at the higher oxidation state to the lower oxidation state at the cathode side while oxidizing the reductant at the anode side.