公开(公告)号：US11996597B2

公开(公告)日：2024-05-28

申请号：US17929625

申请日：2022-09-02

Applicant: ESS TECH, INC.

Inventor： Yang Song ,  Craig Evans

IPC: H01M8/18 ,  H01M8/04186

CPC classification number: H01M8/188 ,  H01M8/04194

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 catalyst bed fluidly connected to the cathode side of the hybrid redox fuel cell, the catalyst bed including a substrate layer and a catalyst layer spiral wound into a jelly roll structure. 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 from the higher oxidation state to the lower oxidation state at the cathode side while oxidizing the reductant at the anode side.

公开(公告)号：US20230343980A1

公开(公告)日：2023-10-26

申请号：US18179262

申请日：2023-03-06

Applicant: ESS TECH, INC.

Inventor： Yang Song ,  Craig Evans ,  Brady Thompson

IPC: H01M8/18 ,  H01M8/04537

CPC classification number: H01M8/188 ,  H01M8/04552

Abstract: Systems and methods are provided for a redox flow battery. In one example, a method of operating a redox flow battery includes charging the redox flow battery, including supplying a pulsed power signal to the redox flow battery in response to the redox flow battery state of charge (SOC) decreasing below a lower threshold redox flow battery SOC, wherein supplying the pulsed power signal includes supplying a pulse-width-modulated (PWM) charging voltage signal to the redox flow battery, the PWM charging voltage signal fluctuating between an upper threshold charging voltage and an open circuit voltage (OCV).

公开(公告)号：US20230088434A1

公开(公告)日：2023-03-23

申请号：US17929627

申请日：2022-09-02

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：US20230062928A1

公开(公告)日：2023-03-02

申请号：US18045021

申请日：2022-10-07

Applicant: ESS TECH, INC.

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

IPC: H01M8/18 ,  H01M8/0438

Abstract: A redox flow battery and battery system are provided. In one example, the redox flow battery includes a set of pressure plates having a first pressure plate at a first terminal end and a second pressure plate at a second terminal end, the second terminal end and the first terminal end positioned on opposing longitudinal sides of the redox flow battery. The redox flow battery further includes a first cell stack positioned longitudinally between the first pressure plate and the second pressure plate, each of the first and second pressure plates includes a plurality stacking detents on a first flange and a plurality of stacking protrusions on a second flange, and the first flange and the second flange arranged on opposing vertical sides of the redox flow battery.

公开(公告)号：US11462764B2

公开(公告)日：2022-10-04

申请号：US17209084

申请日：2021-03-22

Applicant: ESS Tech, Inc.

Inventor： Sean Casey ,  Craig Evans

IPC: H01M8/18 ,  H01M8/248

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：US20240194922A1

公开(公告)日：2024-06-13

申请号：US18537673

申请日：2023-12-12

Applicant: ESS TECH, INC.

Inventor： Thiago Groberg ,  Craig Evans

IPC: H01M8/18 ,  F04D25/02 ,  F04D29/28 ,  F04D29/42 ,  F04D29/66 ,  H01M8/04082 ,  H01M8/04089 ,  H01M8/06

CPC classification number: H01M8/188 ,  F04D25/02 ,  F04D29/281 ,  F04D29/4206 ,  F04D29/662 ,  H01M8/04089 ,  H01M8/04201 ,  H01M8/0693

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：US20240162722A1

公开(公告)日：2024-05-16

申请号：US18504908

申请日：2023-11-08

Applicant: ESS TECH, INC.

Inventor： Yang Song ,  Craig Evans ,  Timothy J. McDonald

IPC: H02J7/00 ,  H01M8/04858 ,  H01M8/04992 ,  H01M8/18

CPC classification number: H02J7/0013 ,  H01M8/04895 ,  H01M8/04992 ,  H01M8/188 ,  H02J7/0068

Abstract: Systems and methods are provided for operating a battery power module. In one example, the method may include constraining an electrical parameter of the battery power module to be constant among a plurality of battery stacks of the battery power module and determining current setpoints for each of the plurality of battery stacks of the battery power module based on an estimated overpotential of each of the plurality of battery stacks of the battery power module.

公开(公告)号：US20230261238A1

公开(公告)日：2023-08-17

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

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.

公开(公告)号：US20230253572A1

公开(公告)日：2023-08-10

申请号：US18149910

申请日：2023-01-04

Applicant: ESS TECH, INC.

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

IPC: H01M4/88 ,  H01M4/86

CPC classification number: H01M4/8875 ,  H01M4/8668 ,  H01M4/8673 ,  H01M8/188 ,  H01M2004/8694

Abstract: Systems and methods are provided for a redox flow battery. In one example, the redox flow battery includes a bipolar plate assembly including a bipolar plate formed of a thermoplastic composite material. The thermoplastic composite material of the bipolar plate allows the bipolar plate to be directly bonded to a dielectric frame of the bipolar plate assembly, thereby simplifying a manufacturing process of the bipolar plate assembly.

公开(公告)号：US11715840B2

公开(公告)日：2023-08-01

申请号：US17450970

申请日：2021-10-14

Applicant: ESS Tech, Inc.

Inventor： Craig Evans ,  Yang Song

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

CPC classification number: H01M8/188 ,  H01M8/04186 ,  H01M8/20 ,  H01M50/60 ,  Y02E60/50 ,  Y10T137/4757

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.