公开(公告)号：US20240396067A1

公开(公告)日：2024-11-28

申请号：US18792266

申请日：2024-08-01

Applicant: ESS TECH, INC.

Inventor： Yang Song ,  Timothy J. McDonald ,  Alexandria Behr

IPC: H01M8/06 ,  H01M8/04186 ,  H01M8/0444 ,  H01M8/04746 ,  H01M8/18

Abstract: Methods and systems are provided for a rebalancing reactor of a flow battery system. In one example, a pH of a battery electrolyte may be maintained by the rebalancing reactor by applying a negative potential to a catalyst bed of the rebalancing reactor. A performance of the rebalancing reactor may further be maintained by treating the catalyst bed with deionized water.

公开(公告)号：US20240063416A1

公开(公告)日：2024-02-22

申请号：US17821400

申请日：2022-08-22

Applicant: ESS Tech, Inc.

Inventor： Sean Kissick ,  Yang Song ,  Timothy J. McDonald

IPC: H01M8/18 ,  H01M8/22

CPC classification number: H01M8/188 ,  H01M8/225

Abstract: Systems and methods are provided for rebalancing cells in a redox flow battery. In one example, a rebalancing cell system includes a first rebalancing cell in series fluidic communication with a second rebalancing cell and a hydrogen source, the first rebalancing cell includes a first electrode assembly stack with hydrogen flow paths extending therethrough and having a higher pressure than an electrolyte in the first electrode assembly stack. Further, the second rebalancing cell includes a second electrode assembly stack with hydrogen flow paths that extend therethrough and have a higher pressure than an electrolyte in the second electrode assembly stack.

公开(公告)号：US20240055643A1

公开(公告)日：2024-02-15

申请号：US18358877

申请日：2023-07-25

Applicant: ESS TECH, INC.

Inventor： Sean Kissick ,  Timothy J. McDonald ,  Yang Song

IPC: H01M8/18 ,  H01M8/04276 ,  H01M8/0438 ,  H01M8/04746 ,  F17C5/06

CPC classification number: H01M8/188 ,  H01M8/04276 ,  H01M8/04425 ,  H01M8/04776 ,  F17C5/06 ,  F17C2201/018 ,  F17C2205/0134 ,  F17C2223/031 ,  F17C2225/033 ,  F17C2205/0332 ,  F17C2250/043 ,  F17C2221/012 ,  F17C2250/0647 ,  F17C2250/03

Abstract: Systems and methods are provided for managing health of electrolytes of redox flow battery system. Components of the system may include a redox rebalancing cells and a gas storage system. The redox rebalancing cell may be operated by plating iron on a plating electrode, treating a negative electrolyte of the redox flow battery system with the plated iron and returning the negative electrolyte to an electrolyte tank. The gas storage system may include a set of expandable gas storage tanks coupled to at least one electrolyte storage tank and an electrolyte rebalancing system of the redox flow battery system.

公开(公告)号：US11764380B2

公开(公告)日：2023-09-19

申请号：US17453993

申请日：2021-11-08

Applicant: ESS Tech, Inc.

Inventor： Yang Song ,  Timothy J. McDonald ,  Alexandria Behr

IPC: H01M8/06 ,  H01M8/18 ,  H01M8/0444 ,  H01M8/04746 ,  H01M8/04186

CPC classification number: H01M8/0693 ,  H01M8/0444 ,  H01M8/04186 ,  H01M8/04753 ,  H01M8/188

Abstract: Methods and systems are provided for a rebalancing reactor of a flow battery system. In one example, a pH of a battery electrolyte may be maintained by the rebalancing reactor by applying a negative potential to a catalyst bed of the rebalancing reactor. A performance of the rebalancing reactor may further be maintained by treating the catalyst bed with deionized water.

公开(公告)号：US11749827B2

公开(公告)日：2023-09-05

申请号：US17080702

申请日：2020-10-26

Applicant: ESS TECH, INC.

Inventor： Yang Song ,  Brady Thompson ,  Timothy J. McDonald

IPC: H01M8/18 ,  H01M8/04537 ,  H01M8/04858 ,  H01M4/52

CPC classification number: H01M8/188 ,  H01M4/521 ,  H01M8/04604 ,  H01M8/04895

Abstract: Methods and systems are provided for iron preformation in a redox flow battery. In one example, a method may include, in a first condition, discharging and then charging the redox flow battery, and in a second condition, charging the redox flow battery including preforming iron metal at a negative electrode of the redox flow battery, and thereafter entering an idle mode of the redox flow battery including adjusting one or more electrolyte conditions. In some examples, each of preforming the iron metal and adjusting the one or more electrolyte conditions may increase a battery charge capacity to greater than a threshold battery charge capacity.

公开(公告)号：US20220123339A1

公开(公告)日：2022-04-21

申请号：US17453993

申请日：2021-11-08

Applicant: ESS Tech, Inc.

Inventor： Yang Song ,  Timothy J. McDonald ,  Alexandria Behr

IPC: H01M8/06 ,  H01M8/18 ,  H01M8/0444 ,  H01M8/04746 ,  H01M8/04186

Abstract: Methods and systems are provided for a rebalancing reactor of a flow battery system. In one example, a pH of a battery electrolyte may be maintained by the rebalancing reactor by applying a negative potential to a catalyst bed of the rebalancing reactor. A performance of the rebalancing reactor may further be maintained by treating the catalyst bed with deionized water.

公开(公告)号：US20210135270A1

公开(公告)日：2021-05-06

申请号：US17080702

申请日：2020-10-26

Applicant: ESS TECH, INC.

Inventor： Yang Song ,  Brady Thompson ,  Timothy J. McDonald

IPC: H01M8/18 ,  H01M4/52 ,  H01M8/04858 ,  H01M8/04537

Abstract: Methods and systems are provided for iron preformation in a redox flow battery. In one example, a method may include, in a first condition, discharging and then charging the redox flow battery, and in a second condition, charging the redox flow battery including preforming iron metal at a negative electrode of the redox flow battery, and thereafter entering an idle mode of the redox flow battery including adjusting one or more electrolyte conditions. In some examples, each of preforming the iron metal and adjusting the one or more electrolyte conditions may increase a battery charge capacity to greater than a threshold battery charge capacity.