公开(公告)号：US20240194921A1

公开(公告)日：2024-06-13

申请号：US18065576

申请日：2022-12-13

Applicant: ESS TECH, INC.

Inventor： Sean Kissick ,  Yang Song ,  Timothy J McDonald

IPC: H01M8/18 ,  H01M8/04089 ,  H01M8/04537 ,  H01M8/04746

CPC classification number: H01M8/188 ,  H01M8/04089 ,  H01M8/04611 ,  H01M8/04753

Abstract: Systems and methods are provided for rebalancing cells in a redox flow battery. In one example, a method of operating a rebalancing cell in a redox flow battery system includes measuring a state-of-charge (SOC) of a redox flow battery in the redox flow battery system, calculating an electrolyte concentration from the measured SOC of the redox flow battery, and maintaining a rebalancing reaction rate at the rebalancing cell. In one example, maintaining the rebalancing includes, responsive to a change in the electrolyte concentration, adjusting an electrolyte flow rate to the rebalancing cell and adjusting a hydrogen flow rate to the rebalancing cell.

公开(公告)号：US20240243328A1

公开(公告)日：2024-07-18

申请号：US18409691

申请日：2024-01-10

Applicant: ESS TECH, INC.

Inventor： Joseph Brindle ,  Sean Kissick ,  Timothy J McDonald ,  Yang Song

IPC: H01M8/18 ,  H01M16/00

CPC classification number: H01M8/188 ,  H01M16/006

Abstract: Systems and methods are provided for maintaining electrolyte health of a redox flow battery system. The redox flow battery system comprising a redox flow battery cell having a positive electrode compartment and a negative electrolyte compartment, an electrolyte storage tank storing positive and negative electrolyte, the positive and negative electrolyte circulated between the electrolyte storage tank and respective positive and negative electrode compartments. The redox flow battery system further comprises a rebalancing battery including a positive electrode arranged in a flow path of the positive electrolyte and a negative electrode arranged in a flow path of the negative electrolyte.