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：US20230253584A1

公开(公告)日：2023-08-10

申请号：US18301935

申请日：2023-04-17

Applicant: ESS TECH, INC.

Inventor： Yang Song ,  Timothy J. McDonald ,  Kenneth Fisher

IPC: H01M8/04276 ,  H01M8/04298 ,  H01M8/18 ,  H01M8/04119

CPC classification number: H01M8/04283 ,  H01M8/04298 ,  H01M8/188 ,  H01M8/04119

Abstract: Methods and systems are provided for a redox flow battery system. In one example, the redox flow battery system includes a power module, an electrolyte pump, and a power control system. The power control system may include instructions to switch the redox flow battery system to an idle mode, activate an electrolyte pump when a first threshold period of time elapses, deactivate the electrolyte pump when a second threshold period of time elapses, and drain, purge, and refill one or more electrode compartments when a third threshold period of time elapses.

公开(公告)号：US20210242479A1

公开(公告)日：2021-08-05

申请号：US17234509

申请日：2021-04-19

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：US20210143455A1

公开(公告)日：2021-05-13

申请号：US17081695

申请日：2020-10-27

Applicant: ESS TECH, INC.

Inventor： Yang Song ,  Craig E. Evans ,  Timothy J. McDonald ,  Kenneth Fisher ,  Sean Kissick

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

Abstract: A rebalancing reactor for a redox flow battery system may include a plurality of reactor vessels arranged in stages, each vessel of the plurality of reactor vessels housing a catalyst bed. In one example, the rebalancing reactor is fluidly coupled to an electrolyte storage tank and configured to flow electrolyte through the plurality of reactor vessels, enabling a chemical rebalancing of electrolyte in the redox flow battery cell.

公开(公告)号：US12087981B2

公开(公告)日：2024-09-10

申请号：US18361626

申请日：2023-07-28

Applicant: ESS TECH, INC.

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

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

CPC classification number: H01M8/0693 ,  H01M8/04186 ,  H01M8/0444 ,  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：US20230378505A1

公开(公告)日：2023-11-23

申请号：US18361626

申请日：2023-07-28

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 ,  H01M8/188 ,  H01M8/0444 ,  H01M8/04753 ,  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：US20230253583A1

公开(公告)日：2023-08-10

申请号：US18301927

申请日：2023-04-17

Applicant: ESS TECH, INC.

Inventor： Yang Song ,  Timothy J. McDonald ,  Kenneth Fisher

IPC: H01M8/04276 ,  H01M8/04298 ,  H01M8/18 ,  H01M8/04119

CPC classification number: H01M8/04283 ,  H01M8/04298 ,  H01M8/188 ,  H01M8/04119

Abstract: Methods and systems are provided for a redox flow battery system. In one example, a method of operating a redox flow battery system includes, responsive to switching the redox flow battery system to an idle mode, initiating a first timer monitoring a first threshold period of time. An electrolyte pump may be activated when the first threshold period of time elapses, the electrolyte pump driving circulation of electrolytes through one or more electrode compartments.

公开(公告)号：US11664512B2

公开(公告)日：2023-05-30

申请号：US17308890

申请日：2021-05-05

Applicant: ESS Tech, Inc.

Inventor： Yang Song ,  Timothy J. McDonald ,  Kenneth Fisher

IPC: H01M8/04276 ,  H01M8/04298 ,  H01M8/18 ,  H01M8/04119

CPC classification number: H01M8/04283 ,  H01M8/04119 ,  H01M8/04298 ,  H01M8/188

Abstract: Methods and systems are provided for a redox flow battery system. In one example, a method of operating a redox flow battery system includes switching the redox flow battery system to an idle mode and completely draining electrolytes from one or more electrode compartments of the redox flow battery system. The one or more electrode compartments may be purged with a gas and refilled with fresh electrolytes.

公开(公告)号：US20210359315A1

公开(公告)日：2021-11-18

申请号：US17308890

申请日：2021-05-05

Applicant: ESS Tech, Inc.

Inventor： Yang Song ,  Timothy J. McDonald ,  Kenneth Fisher

IPC: H01M8/04276 ,  H01M8/04119 ,  H01M8/18 ,  H01M8/04298

Abstract: Methods and systems are provided for a redox flow battery system. In one example, a method of operating a redox flow battery system includes switching the redox flow battery system to an idle mode and completely draining electrolytes from one or more electrode compartments of the redox flow battery system. The one or more electrode compartments may be purged with a gas and refilled with fresh electrolytes.

公开(公告)号：US20210075039A1

公开(公告)日：2021-03-11

申请号：US17099191

申请日：2020-11-16

Applicant: ESS TECH, INC.

Inventor： Yang Song ,  Timothy J. McDonald ,  Thiago Groberg

IPC: H01M8/04537 ,  H01M8/18 ,  H01M8/04858 ,  H01M8/04955

Abstract: Systems and methods for operating an electric energy storage device are described. The systems and methods may generate a state of charge estimate that is based on negative electrode plating. An overall state of charge may be determined from the state of charge estimate that is based on negative electrode plating and a state of charge estimate that is not based on negative electrode plating.