Methods and systems for surface disruption of bipolar plate and subsequent use thereof in redox flow battery

    公开(公告)号:US12095130B2

    公开(公告)日:2024-09-17

    申请号:US17823932

    申请日:2022-08-31

    Applicant: ESS TECH, INC.

    Inventor: Sean Casey

    CPC classification number: H01M8/188 H01M4/8631 H01M4/8875 H01M2004/8694

    Abstract: Systems and methods are provided for mechanical pretreatment of bipolar plates, for example, for plating electrodes in redox flow batteries. In one example, a method for disrupting surfaces of a bipolar plate may include pressing the bipolar plate between imprint plates, and removing the pressed bipolar plate from the imprint plates prior to use in a redox flow battery. In some examples, the pressed bipolar plate may include negative indentations from at least one of the imprint plates. In some examples, the imprint plates may be patterned meshes, such that the negative indentations may include patterns of asymmetric protrusions. In this way, the bipolar plate may be pretreated via pressing so as to reduce wear to manufacturing equipment (relative to other mechanical pretreatment processes, for example) while maintaining electrochemical performance of the redox flow battery.

    ELECTROMAGNETIC MIXING
    108.
    发明公开

    公开(公告)号:US20240238743A1

    公开(公告)日:2024-07-18

    申请号:US18409674

    申请日:2024-01-10

    Applicant: ESS TECH, INC.

    Inventor: Nicholas Chen

    CPC classification number: B01F33/453 B01F2101/59

    Abstract: Systems and methods are provided for an external electromagnetic mixing system. The external electromagnetic mixing system includes a plurality of electromagnetics spaced externally around a production tank which contains a liquid and a ferromagnetic and/or ferrimagnetic solid. The plurality of electromagnets are configured to move the ferromagnetic and/or ferrimagnetic solid within the liquid.

    HYDROGEN PUMP FOR A REDOX FLOW BATTERY
    110.
    发明公开

    公开(公告)号:US20240194907A1

    公开(公告)日:2024-06-13

    申请号:US18537641

    申请日:2023-12-12

    Applicant: ESS TECH, INC.

    Abstract: Systems and methods are provided for actively directing hydrogen flow in an electrochemical cell system. The electrochemical cell system includes a component configured to receive hydrogen gas, one or more hydrogen blower assemblies positioned upstream and/or downstream of the component. The one or more hydrogen blowers include at least one sensor positioned on an outer surface of the one or more hydrogen blower assemblies and a controller including instructions to generate a notification in response to an output of the at least one sensor being outside of a target range.

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