Battelle Memorial Institute

Xiaoqin Zang

Wei Wang

Zimin Nie

Jun Lu

Z Daniel Deng

Huilin Pan

Litao Yan

Yang Yang

This document describes techniques and systems for in operando, non-invasive SOC monitoring of redox flow batteries. The described techniques and systems allow for accurate, inexpensive, portable, and real-time methods to measure the SOC of redox flow batteries. System operators can monitor the SOC by measuring an acoustic attenuation coefficient of the electrolyte in the redox flow battery. The acoustic attenuation coefficient is measured using an ultrasonic transducer attached to a probing cell, which is connected to an electrolyte flow of a redox flow battery. The acoustic attenuation coefficient provides an accurate, real-time SOC measurement that is generally insensitive to varying operational temperatures of the electrolyte solution.

In operando, non-invasive state-of-charge monitoring for redox flow batteries

Growing community of inventors

Richland, WA, United States of America

Xiaoqin Zang