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    Electrode assembly for a redox flow battery
    91.
    发明授权
    Electrode assembly for a redox flow battery 有权

    公开(公告)号：US12255370B2

    公开(公告)日：2025-03-18

    申请号：US18296170

    申请日：2023-04-05

    Applicant: ESS TECH, INC.

    Inventor： Sean Casey ,  Craig Evans ,  Thiago Groberg ,  Yang Song

    IPC: H01M8/248 ,  H01M8/0247 ,  H01M8/18

    Abstract: Methods and systems are provided for a redox flow battery system. In one example, the redox flow battery system includes a cell stack compressed between terminal structures defining ends of the redox flow battery. The cell stack may be formed of a plurality of cells where each cell includes a deformable positive electrode in contact with a first face of a membrane separator and a negative electrode configured to be less compressible than the positive electrode and arranged at a second face of the membrane separator.

    Hybrid redox fuel cell system
    92.
    发明授权
    Hybrid redox fuel cell system 有权

    公开(公告)号：US12191548B2

    公开(公告)日：2025-01-07

    申请号：US17929623

    申请日：2022-09-02

    Applicant: ESS TECH, INC.

    Inventor： Yang Song ,  Craig Evans

    IPC: H01M8/18 ,  H01M8/06 ,  H01M8/22

    Abstract: A hybrid redox fuel cell system includes a hybrid redox fuel cell including an anode side through which a reductant is flowed and a cathode side through which liquid electrolyte is flowed, and a trickle bed reactor including a catalyst bed fluidly connected to the cathode side of the hybrid redox fuel cell. Furthermore, 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 way of 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.

    HYBRID REDOX FUEL CELL SYSTEM
    93.
    发明申请
    HYBRID REDOX FUEL CELL SYSTEM 有权

    公开(公告)号：US20250006966A1

    公开(公告)日：2025-01-02

    申请号：US18829070

    申请日：2024-09-09

    Applicant: ESS TECH, INC.

    Inventor： Yang Song ,  Craig Evans

    IPC: H01M8/18 ,  H01M4/90 ,  H01M8/06

    Abstract: A hybrid redox fuel cell system includes a hybrid redox fuel cell and an electrochemical cell. The hybrid redox fuel cell includes an anode side through which hydrogen is flowed and a cathode side through which liquid electrolyte is flowed, the liquid electrolyte including a metal ion at a higher oxidation state and the metal ion at a lower oxidation state. An anode side of the electrochemical cell is fluidly connected to the cathode side of the hybrid redox fuel cell. At the hybrid redox fuel cell, power is generated 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. At the anode side of the electrochemical cell, the metal ion at the lower oxidation state is oxidized to the higher oxidation state while the power is generated.

    SYSTEMS AND METHODS FOR MAINTAINING ELECTROLYTE HEALTH
    96.
    发明公开
    SYSTEMS AND METHODS FOR MAINTAINING ELECTROLYTE HEALTH 审中-公开

    公开(公告)号：US20240243328A1

    公开(公告)日：2024-07-18

    申请号：US18409691

    申请日：2024-01-10

    Applicant: ESS TECH, INC.

    Inventor： Joseph Brindle ,  Sean Kissick ,  Timothy J McDonald ,  Yang Song

    IPC: H01M8/18 ,  H01M16/00

    CPC classification number: H01M8/188 ,  H01M16/006

    Abstract: Systems and methods are provided for maintaining electrolyte health of a redox flow battery system. The redox flow battery system comprising a redox flow battery cell having a positive electrode compartment and a negative electrolyte compartment, an electrolyte storage tank storing positive and negative electrolyte, the positive and negative electrolyte circulated between the electrolyte storage tank and respective positive and negative electrode compartments. The redox flow battery system further comprises a rebalancing battery including a positive electrode arranged in a flow path of the positive electrolyte and a negative electrode arranged in a flow path of the negative electrolyte.

    METHODS AND SYSTEMS FOR PRETREATING BIPOLAR PLATE AND USE THEREOF IN REDOX FLOW BATTERY
    100.
    发明公开
    METHODS AND SYSTEMS FOR PRETREATING BIPOLAR PLATE AND USE THEREOF IN REDOX FLOW BATTERY 审中-公开

    公开(公告)号：US20230378482A1

    公开(公告)日：2023-11-23

    申请号：US18363576

    申请日：2023-08-01

    Applicant: ESS TECH, INC.

    Inventor： Yang Song ,  Yan Wu ,  Brady Thompson

    IPC: H01M8/0247 ,  H01M8/0228 ,  H01M8/18

    CPC classification number: H01M8/0247 ,  H01M8/0228 ,  H01M8/188

    Abstract: Systems and methods are provided for electrochemical and/or chemical pretreatment of bipolar plates, for example, for plating electrodes in redox flow batteries. In one example, a method may include pretreating a bipolar plate for the redox flow battery by disrupting a surface of the bipolar plate. In some examples, pretreating the bipolar plate may include positioning the bipolar plate within the redox flow battery, and thereafter charging the redox flow battery at multiple discrete plating current densities for each of one or more initial charging cycles to electrochemically etch the surface. In additional or alternative examples, pretreating the bipolar plate may include soaking the bipolar plate in solution to chemically treat the surface. In this way, the bipolar plate may be pretreated via electrochemical etching and/or chemical treatment so as to reduce electrochemical performance losses and dendrite formation in the redox flow battery.

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