公开(公告)号：US20180013164A1

公开(公告)日：2018-01-11

申请号：US15711879

申请日：2017-09-21

Applicant: ESS TECH, INC.

Inventor： Craig E. Evans ,  Yang Song

IPC: H01M8/18 ,  H01M8/20

CPC classification number: H01M8/188 ,  H01M8/20 ,  H01M2300/0002 ,  H01M2300/0005 ,  Y02E60/528

Abstract: An iron redox flow battery system, comprising a redox electrode, a plating electrolyte tank, a plating electrode, a redox electrolyte tank with additional acid additives that may be introduced into the electrolytes in response to electrolyte pH. The acid additives may act to suppress undesired chemical reactions that create losses within the battery and may be added in response to sensor indications of these reactions.

公开(公告)号：US20170256803A1

公开(公告)日：2017-09-07

申请号：US15601560

申请日：2017-05-22

Applicant: ESS TECH, INC.

Inventor： Craig E. Evans ,  Sean Casey ,  Yang Song

IPC: H01M8/0258 ,  H01M8/18

CPC classification number: H01M8/0258 ,  H01M4/8803 ,  H01M4/8817 ,  H01M4/8828 ,  H01M8/0239 ,  H01M8/0245 ,  H01M8/188 ,  H01M8/20 ,  Y02E60/528

Abstract: A redox flow battery may include: a membrane interposed between a first electrode positioned at a first side of the membrane and a second electrode positioned at a second side of the membrane opposite to the first side; a first flow field plate comprising a plurality of positive flow field ribs, each of the plurality of positive flow field ribs contacting the first electrode at first supporting regions on the first side; and the second electrode, including an electrode spacer positioned between the membrane and a second flow field plate, the electrode spacer comprising a plurality of main ribs, each of the plurality of main ribs contacting the second flow field plate at second supporting regions on the second side, each of the second supporting regions aligned opposite to one of the plurality of first supporting regions. As such, a current density distribution at a plating surface may be reduced.

公开(公告)号：US20170040630A1

公开(公告)日：2017-02-09

申请号：US15297011

申请日：2016-10-18

Applicant: ESS TECH, INC.

Inventor： Yang Song ,  Craig E. Evans

IPC: H01M8/06 ,  H01M8/18 ,  H01M8/20

CPC classification number: H01M8/0693 ,  H01M8/188 ,  H01M8/20 ,  Y02E60/528

Abstract: A redox flow battery system is provided. The system includes a positive electrode in fluid communication with a positive electrolyte comprising a first metal ion and a negative electrode in fluid communication with a negative electrolyte comprising a second metal ion. An electrically insulating ion conducting surface is provided separating the positive electrode from the negative electrode. Further, the system includes a catalyst surface in fluid communication with the first metal ion, the second metal ion, or a combination thereof, and hydrogen gas, wherein the hydrogen gas and the first metal ion, the second metal ion, or a combination thereof are fluidly contacted at the catalyst surface.

Abstract translation: 提供氧化还原液流电池系统。 该系统包括与包含与包含第二金属离子的负电解质流体连通的第一金属离子和负极的正电解质流体连通的正电极。 提供了将正极与负极分离的电绝缘离子传导表面。 此外，该系统包括与第一金属离子，第二金属离子或其组合流体连通的催化剂表面和氢气，其中氢气和第一金属离子，第二金属离子或其组合 在催化剂表面流体接触。

公开(公告)号：US20160293992A1

公开(公告)日：2016-10-06

申请号：US15182543

申请日：2016-06-14

Applicant: ESS TECH, INC.

Inventor： Yang Song ,  Craig E. Evans

IPC: H01M8/18 ,  H01M8/06 ,  H01M8/00 ,  H01M8/20

CPC classification number: H01M8/188 ,  H01M8/004 ,  H01M8/20 ,  Y02E60/528

Abstract: A method of rebalancing electrolytes in a redox flow battery system comprises directing hydrogen gas generated on the negative side of the redox flow battery system to a catalyst surface, and fluidly contacting the hydrogen gas with an electrolyte comprising a metal ion at the catalyst surface, wherein the metal ion is chemically reduced by the hydrogen gas at the catalyst surface, and a state of charge of the electrolyte and pH of the electrolyte remain substantially balanced.

Abstract translation: 在氧化还原液流电池系统中重新平衡电解质的方法包括将在氧化还原液流电池系统的负极侧产生的氢气引导到催化剂表面，并且在催化剂表面处将氢气与包含金属离子的电解液流体接触，其中 金属离子被催化剂表面的氢气化学还原，并且电解质的电荷状态和电解液的pH保持基本平衡。

公开(公告)号：US12283730B2

公开(公告)日：2025-04-22

申请号：US17229719

申请日：2021-04-13

Applicant: ESS Tech, Inc.

Inventor： Yang Song

IPC: H01M8/18 ,  H01M4/36 ,  H01M4/58 ,  H01M8/02 ,  H01M8/1018

Abstract: Methods and systems are provided for a redox flow battery system. In one example, the redox flow battery is adapted with an additive included in a battery electrolyte and an anion exchange membrane separator dividing positive electrolyte from negative electrolyte. An overall system cost of the battery system may be reduced while a storage capacity, energy density and performance may be increased.

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：US20240151572A1

公开(公告)日：2024-05-09

申请号：US18481083

申请日：2023-10-04

Applicant: ESS TECH, INC.

Inventor： Joseph M. Cooley

IPC: G01F23/28 ,  G01F23/284 ,  G01F23/2962 ,  H01M8/04082 ,  H01M8/04298 ,  H01M8/18

CPC classification number: G01F23/28 ,  G01F23/284 ,  G01F23/2962 ,  H01M8/04201 ,  H01M8/04298 ,  H01M8/188

Abstract: Systems and methods are provided for a non-contact level sensor system for a liquid tank. The non-contact level sensor system includes a non-contact level sensor positioned above a maximum level of liquid in the liquid tank, a float configured to float on a surface of the liquid and reflect and/or scatter energy emitted by the non-contact level sensor. The position of the float in a plane perpendicular to the energy emitted by the non-contact level sensor is confined within a housing, and the vertical distance between the float and the non-contact level sensor is related to an amount of liquid inside the liquid tank.

公开(公告)号：US11929534B2

公开(公告)日：2024-03-12

申请号：US17070852

申请日：2020-10-14

Applicant: ESS TECH, INC.

Inventor： Yang Song ,  Craig E. Evans ,  Brady Thompson

IPC: H01M8/18

CPC classification number: H01M8/188

Abstract: A method for a redox flow battery may include, interrupting cycling of the redox flow battery, including charging the redox flow battery to a threshold charge condition, draining positive and negative electrolyte from the redox flow battery, circulating a wash solution through the redox flow battery, and returning the positive and negative electrolyte to the redox flow battery, and resuming cycling of the redox flow battery. In this way, contamination of the redox flow battery system can be reduced, thereby prolonging the life and increasing performance of the redox flow battery system.

公开(公告)号：US20240063410A1

公开(公告)日：2024-02-22

申请号：US18495580

申请日：2023-10-26

Applicant: ESS TECH, INC.

Inventor： Isaac Walker-Stern ,  Aaron Vanderzanden

IPC: H01M8/04186 ,  H01M8/04276 ,  H01M8/04537 ,  H01M8/04955 ,  H01M8/18

CPC classification number: H01M8/04186 ,  H01M8/04276 ,  H01M8/04574 ,  H01M8/04955 ,  H01M8/188

Abstract: Systems and methods for operating an electric energy storage device are described. The systems and methods may reduce a voltage potential between a ground reference and terminals of an electric energy storage device. By lowering the voltage potential, a possibility of unintentionally discharging the electrical energy storage device to ground may be reduced.