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.

公开(公告)号：US12160025B2

公开(公告)日：2024-12-03

申请号：US17821759

申请日：2022-08-23

Applicant: ESS TECH, INC.

Inventor： Sean Casey ,  Craig Evans

IPC: H01M8/248 ,  H01M8/18

Abstract: Methods and systems are provided for a redox flow battery system. In one example, the redox flow battery system has a first redox flow battery and a second redox flow battery, stacked above and in contact with the first redox flow battery along a vertical axis of the redox flow battery system. The second redox flow battery may be coupled to the first redox flow battery via nesting detents. Furthermore, operation of the first redox flow battery and the second redox flow battery may be adjustable according to a power demand.

公开(公告)号：US20240396064A1

公开(公告)日：2024-11-28

申请号：US18674401

申请日：2024-05-24

Applicant: ESS TECH, INC.

Inventor： Craig Evans

IPC: H01M8/04276 ,  H01M8/04082 ,  H01M8/0444 ,  H01M8/04537 ,  H01M8/04746 ,  H01M8/18

Abstract: Systems and methods are provided for a redox flow battery system. In one example, the redox flow battery system includes an electrolyte storage tank having a first chamber and a second chamber, and a mixing valve fluidically coupling the first chamber to the second chamber. The mixing valve may be selectively opened according to predetermined duty cycles to allow exchange of electrolyte between the first chamber and the second chamber.

公开(公告)号：US11233299B2

公开(公告)日：2022-01-25

申请号：US16548500

申请日：2019-08-22

Applicant: ESS TECH, INC.

Inventor： Craig Evans ,  Yang Song

IPC: H01M50/60 ,  H01M8/18 ,  H01M8/20 ,  H01M8/04186

Abstract: In one example, a system for a flow cell for a flow battery, comprising: a first flow field; and a polymeric frame, comprising: a top face; a bottom face, opposite the top face; a first side; a second side, opposite the first side; a first electrolyte inlet located on the top face and the first side of the polymeric frame; a first electrolyte outlet located on the top face and the second side of the polymeric frame; a first electrolyte inlet flow path located within the polymeric frame and coupled to the first electrolyte inlet; and a first electrolyte outlet flow path located within the polymeric frame and coupled to the first electrolyte outlet. In this way, shunt currents may be minimized by increasing the length and/or reducing the cross-sectional area of the electrolyte inlet and electrolyte outlet flow paths.

公开(公告)号：US20210359331A1

公开(公告)日：2021-11-18

申请号：US17209084

申请日：2021-03-22

Applicant: ESS Tech, Inc.

Inventor： Sean Casey ,  Craig Evans

IPC: H01M8/248 ,  H01M8/18

Abstract: Methods and systems are provided for a redox flow battery system. In one example, the redox flow battery system has a set of pressure plates with a sub-stack separator plate arranged between the first pressure plate and the second pressure plate and a first cell stack positioned between the first pressure plate and the sub-stack separator plate. The redox flow battery system may further include a second cell stack positioned between the second pressure plate and the sub-stack separator plate.

公开(公告)号：US20200006744A1

公开(公告)日：2020-01-02

申请号：US16548500

申请日：2019-08-22

Applicant: ESS TECH, INC.

Inventor： Craig Evans ,  Yang Song

IPC: H01M2/36 ,  H01M8/18 ,  H01M8/20 ,  H01M8/04186

Abstract: In one example, a system for a flow cell for a flow battery, comprising: a first flow field; and a polymeric frame, comprising: a top face; a bottom face, opposite the top face; a first side; a second side, opposite the first side; a first electrolyte inlet located on the top face and the first side of the polymeric frame; a first electrolyte outlet located on the top face and the second side of the polymeric frame; a first electrolyte inlet flow path located within the polymeric frame and coupled to the first electrolyte inlet; and a first electrolyte outlet flow path located within the polymeric frame and coupled to the first electrolyte outlet. In this way, shunt currents may be minimized by increasing the length and/or reducing the cross-sectional area of the electrolyte inlet and electrolyte outlet flow paths.

公开(公告)号：US10439197B2

公开(公告)日：2019-10-08

申请号：US15476795

申请日：2017-03-31

Applicant: ESS TECH, INC.

Inventor： Craig Evans ,  Yang Song

IPC: H01M2/36 ,  H01M8/18 ,  H01M8/20 ,  H01M8/04186

Abstract: In one example, a system for a flow cell for a flow battery, comprising: a first flow field; and a polymeric frame, comprising: a top face; a bottom face, opposite the top face; a first side; a second side, opposite the first side; a first electrolyte inlet located on the top face and the first side of the polymeric frame; a first electrolyte outlet located on the top face and the second side of the polymeric frame; a first electrolyte inlet flow path located within the polymeric frame and coupled to the first electrolyte inlet; and a first electrolyte outlet flow path located within the polymeric frame and coupled to the first electrolyte outlet. In this way, shunt currents may be minimized by increasing the length and/or reducing the cross-sectional area of the electrolyte inlet and electrolyte outlet flow paths.

公开(公告)号：US20250046849A1

公开(公告)日：2025-02-06

申请号：US18922195

申请日：2024-10-21

Applicant: ESS Tech, Inc.

Inventor： Sean Casey ,  Craig Evans

IPC: H01M8/248 ,  H01M8/18

Abstract: Methods and systems are provided for a redox flow battery system. In one example, the redox flow battery system has a first redox flow battery and a second redox flow battery, stacked above and in contact with the first redox flow battery along a vertical axis of the redox flow battery system. The second redox flow battery may be coupled to the first redox flow battery via nesting detents. Furthermore, operation of the first redox flow battery and the second redox flow battery may be adjustable according to a power demand.

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.

Inventor： Thiago Groberg ,  Craig Evans

IPC: H01M8/04082 ,  H01M8/0438 ,  H01M8/04746 ,  H01M8/04858

CPC classification number: H01M8/04201 ,  H01M8/04388 ,  H01M8/04753 ,  H01M8/04947 ,  H01M8/188

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.

公开(公告)号：US11677093B2

公开(公告)日：2023-06-13

申请号：US17308913

申请日：2021-05-05

Applicant: ESS Tech, Inc.

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

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

CPC classification number: H01M8/248 ,  H01M8/0247 ,  H01M8/188

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.