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1. (WO2018201079) METHODS AND SYSTEM FOR A BATTERY

Pub. No.:    WO/2018/201079    International Application No.:    PCT/US2018/030007
Publication Date: Fri Nov 02 00:59:59 CET 2018 International Filing Date: Sat Apr 28 01:59:59 CEST 2018
IPC: H01M 8/18
H01M 8/04276
H01M 8/04746
Applicants: ESS TECH, INC.
Inventors: SONG, Yang
DOREMUS, Evan
Title: METHODS AND SYSTEM FOR A BATTERY
Abstract:
Systems and methods for operating a redox flow battery system may include switching the redox flow battery system to an idle mode, wherein the idle mode includes operation of the redox flow battery system outside of a charging mode and outside of a discharge mode; in response to switching to the idle mode, repeatedly cycling operation of an electrolyte pump between an idling threshold flow rate less than a charging threshold flow rate and a deactivation threshold flow rate; and in response to switching to the charging mode, maintaining operation of the electrolyte pump at the charging threshold flow rate greater than the idling threshold flow rate. In this way, a responsiveness of the redox flow battery system to charging and discharging commands can be maintained while in idle, while reducing parasitic pumping losses due to pumping and heating, and reducing shunt current losses.