In-situ monitoring method of state of charge of anode electrolyte of vanadium battery

A positive electrolyte and state of charge technology, which is applied in the field of monitoring the state of charge of the positive electrolyte of the all-vanadium redox flow battery, can solve the problems of long time consumption, cumbersome operation, and unsuitability for SOC in-situ monitoring, etc., and achieves convenience The effect of in situ monitoring

Inactive Publication Date: 2011-02-09
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for in-situ monitoring of the state of charge of the vanadium battery cathode electrolyte, to solve the problems in the prior art that the operation is cumbersome and time-consuming, and it is not suitable for in-situ monitoring of SOC.

Method used

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  • In-situ monitoring method of state of charge of anode electrolyte of vanadium battery
  • In-situ monitoring method of state of charge of anode electrolyte of vanadium battery
  • In-situ monitoring method of state of charge of anode electrolyte of vanadium battery

Examples

Experimental program
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Effect test

Embodiment 1

[0068] Place a digital pH meter with a redox composite electrode and a digital thermometer in a well-functioning vanadium battery positive electrolyte reservoir to monitor ORP a The value is 958mV at a temperature of 10°C. Substitute into formula (6) to calculate the state of charge SOC a，c The value is 92.30%.

Embodiment 2

[0070] Place a digital pH meter with a redox composite electrode and a digital thermometer in a well-functioning vanadium battery positive electrolyte reservoir to monitor ORP a The value is 940mV and the temperature is 15°C. Substitute into formula (6) to calculate the state of charge SOC a，c The value is 84.79%.

Embodiment 3

[0072] Place a digital pH meter with a redox composite electrode and a digital thermometer in a well-functioning vanadium battery positive electrolyte reservoir to monitor ORP a The value is 924mV and the temperature is 20°C. Substitute into formula (6) to calculate the state of charge SOC a， c The value is 74.23%.

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Abstract

The invention relates to the monitoring technology of the state of charge (SOC) of electrolyte of a vanadium redox flow battery, in particular to an in-situ monitoring method of the SOC of the anode electrolyte of the battery. The method comprises the following steps: measuring the oxidation reduction potential value ORPa of the anode electrolyte of the vanadium redox flow battery; establishing a relation equation according to the principle that the ORPa value is in linear relation with SOCa (the SOC of the anode electrolyte) in an open interval (0,100%), and then performing temperature correction and temperature substitution on the equation to obtain an ORPa-SOCa relation equation which has universality on the temperature of the anode electrolyte; and comparing the SOCa value calculated by the equation with the SOCa value measured by a potentiometric titration method to obtain the error of less than plus or minus 1.50%, thus finally realizing in-situ monitoring of the SOC of the anode electrolyte.

Description

technical field [0001] The invention relates to a monitoring technology for the state of charge of the positive electrolyte of a vanadium redox flow battery (vanadium redox flow battery, hereinafter referred to as a vanadium battery), specifically an in-situ monitoring of the state of charge (SOC, State) of the positive electrolyte of a vanadium battery. of Charge) method. In addition, the present invention also relates to the specific application of the method in the in-situ monitoring process of the positive electrode electrolyte during the operation of the vanadium battery. Background technique [0002] All-vanadium ion redox flow battery is based on with V 2+ / V 3+ Compared with the traditional lead-acid battery, the new secondary battery and energy storage technology based on the potential difference of the electric pair and the oxidation-reduction reaction has many advantages such as fast and large-capacity charge and discharge, low self-discharge rate, simple stru...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/36G01R31/36H01M8/18
CPCY02E60/528Y02E60/10Y02E60/50
Inventor 刘建国管勇秦野任爽严川伟
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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