Design of acid-lead battery stage-of-charge detection system based on refractive index detection technology

Junyao Chen; Kecheng Yang; Min Xia; Lei Li; Xianjiang Zeng

doi:10.1117/12.2199904

15 October 2015 Design of acid-lead battery stage-of-charge detection system based on refractive index detection technology

Junyao Chen, Kecheng Yang, Min Xia, Lei Li, Xianjiang Zeng

Author Affiliations +

Proceedings Volume 9674, AOPC 2015: Optical and Optoelectronic Sensing and Imaging Technology; 967429 (2015) https://doi.org/10.1117/12.2199904
Event: Applied Optics and Photonics China (AOPC2015), 2015, Beijing, China

Abstract

Based on optical total reflection critical Angle method, we have designed a refractive index measurement system. It adopted a divergent light source and a CCD camera as the occurrence and receiver of the signal. The divergent light source sent out a bunch of tapered beam, exposure to the interface of optical medium and sulfuric acid solution. Light intensity reflected from the interface could be detected by the CCD camera and then sent to the embedded system. In the DSP embedded system, we could obtain the critical edge position through the light intensity distribution curve and converted it to critical angle. Through experiment, we concluded the relation between liquid refractive index and the critical angle edge position. In this system, the detecting precision of the refractive index of sulfuric acid solution reached 10^-4. Finally, through the conversion of the refractive index and density, we achieved high accuracy online measurement of electrolyte density in lead-acid battery.

Citation Download Citation

Junyao Chen, Kecheng Yang, Min Xia, Lei Li, and Xianjiang Zeng "Design of acid-lead battery stage-of-charge detection system based on refractive index detection technology", Proc. SPIE 9674, AOPC 2015: Optical and Optoelectronic Sensing and Imaging Technology, 967429 (15 October 2015); https://doi.org/10.1117/12.2199904

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