Method and device for detecting charging state of vanadium redox battery

A charge state and detection method technology, applied in the field of measurement, can solve the problems of long detection time, difficulty in detecting high concentration of vanadium batteries, complex steps of potentiometric titration and chromatography, etc., and achieve the effect of fast detection speed

CN102621078BActive Publication Date: 2014-03-05SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2014-03-05

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Abstract

The invention discloses a method for detecting charging state of a vanadium redox battery, which includes the following steps of firstly, detecting electrolyte of the vanadium redox battery by a spectral type surface plasma resonance sensor to obtain surface plasma resonance spectral information of the electrolyte and computing surface plasma resonance wavelength and / or refractive index of the electrolyte; and secondly, inquiring or computing charging state of the vanadium redox battery by a prebuilt database of relation between the surface plasma resonance wavelength and / or refractive index of the electrolyte with various parameters and the charging state. The method can detect the charging state of the vanadium redox battery online, can acquire imbalance degree in real time and can adjust the system when the vanadium redox battery is not at the perfect state.
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Description

technical field

[0001] The invention belongs to the field of measurement technology, in particular to a method and device for detecting the state of charge of a vanadium battery based on a spectral surface plasmon resonance detection technology. Background technique

[0002] Invented in the 1980s (J. Electrochem. Soc. 1986, 133:1057), the vanadium redox flow battery (VRB or vanadium battery for short) has the advantages of easy scale, long service life, Environmental friendliness and other advantages have attracted wide attention in the field of energy storage technology.

[0003] In vanadium batteries, the working substances in the positive and negative electrodes are electrolytes containing vanadium ions. During the charging process, the +4 valence vanadium ions in the positive electrode are transformed into +5 valence vanadium ions, and the +3 valence vanadium ions in the negative electrode are transformed into +2 valence vanadium ions; the reverse is true during the dis...

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Embodiment Construction

[0037] The present invention will be described in detail below with reference to the accompanying drawings and in combination with preferred specific embodiments.

[0038] Based on the SPR technology, the detection of the electrolyte of the vanadium battery in the present invention can measure the positive electrode or the negative electrode electrolyte alone, and can also measure the positive and negative electrode electrolytes simultaneously.

[0039] The invention provides a method for detecting the state of charge of a vanadium battery, such as figure 1 As shown, in one embodiment, the detection method includes the steps of:

[0040] (1) Use a spectral SPR sensor to detect the electrolyte of the vanadium battery, obtain the SPR spectrum information of the electrolyte, and calculate the surface plasmon resonance wavelength (referred to as the SPR resonance wavelength) and / or refractive index of the electrolyte;

[0041] (2) The state of charge of the vanadium battery is ob...