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.