Bloom Energy Corporation

Enervault Corparation

Deepak Bose

Matthias Gottmann

Darren Bawden Hickey

Stephen Couse

Dien Nguyen

Ian Russell

Tad Armstrong

Craig R Horne

Kim Kinoshita

Jay E Sha

A reduction/oxidation ('redox') flow battery system includes a series of electrochemical cells arranged in a cascade, whereby liquid electrolyte reacts in a first electrochemical cell (or group of cells) before being directed into a second cell (or group of cells) where it reacts before being directed to subsequent cells. The cascade includes 2 to n stages, each stage having one or more electrochemical cells. During a charge reaction, electrolyte entering a first stage will have a lower state-of-charge than electrolyte entering the nth stage. In some embodiments, cell components and/or characteristics may be configured based on a state-of-charge of electrolytes expected at each cascade stage. Such engineered cascades provide redox flow battery systems with higher energy efficiency over a broader range of current density than prior art arrangements.

Cascade redox flow battery systems

Various embodiments include a fuel cell stack including a plurality of fuel cells including a cell anode electrode, a cell electrolyte, and a cell cathode electrode and separated by a plurality of conductive interconnects and at least one material located in a cell anode electrode of the plurality of fuel cells which provides a conductive path between adjacent interconnects when the cell anode electrode between the adjacent interconnects fails.

Fuel cell stack components and materials

An interconnect for a fuel cell stack includes a first set of gas flow channels in a first portion of the interconnect, and a second set of gas flow channels in second portion of the interconnect. The channels of the first set have a larger cross sectional area than the channels of the second set.

Fuel cell stack components

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Fremont, CA, United States of America

Deepak Bose