公开(公告)号：US11415552B2

公开(公告)日：2022-08-16

申请号：US16893953

申请日：2020-06-05

Applicant: Battelle Memorial Institute

Inventor： Zhiqun Deng ,  Wei Wang ,  Xiaoqin Zang ,  Litao Yan ,  Yang Yang ,  Huilin Pan ,  Zimin Nie ,  Jun Lu

IPC: G01N29/032 ,  G01N29/30 ,  H01M8/04537 ,  H01M8/18 ,  G01N29/34

Abstract: 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.

公开(公告)号：US20240210356A1

公开(公告)日：2024-06-27

申请号：US18541396

申请日：2023-12-15

Applicant: BATTELLE MEMORIAL INSTITUTE

Inventor： Xiaoqin Zang ,  Zhiqun Deng ,  Wei Wang ,  Litao Yan ,  Zimin Nie

IPC: G01N29/032 ,  G01N29/024 ,  G01N29/24 ,  H01M8/04313 ,  H01M8/18

CPC classification number: G01N29/032 ,  G01N29/024 ,  G01N29/2475 ,  H01M8/04313 ,  H01M8/188 ,  G01N2291/02416

Abstract: This document describes techniques and systems for in operando, non-invasive monitoring of byproducts that commonly arise within redox flow batteries. The described techniques and systems allow for accurate, inexpensive, portable, and real-time methods to measure evolution of gas bubbles and precipitates within the electrolyte solutions of redox flow batteries. System operators can monitor and maintain the amount of byproducts within the electrolyte solution by measuring an acoustic attenuation coefficient of the electrolyte solution and changes in the speed at which ultrasonic echoes propagate through the solution. 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 identification of byproducts that is generally insensitive to varying operational temperatures of the electrolyte solution. The probing cell also allows examination of the sound speed as it detects echoes of the transmitted frequencies.