Fiber optic in-situ sensor for accurate monitoring the discharge quantity of lead-acid batteries

Yunxin Hu; Zifan Huang; Siyu Qian; Shengchun Liu

doi:10.1117/12.2690783

17 August 2023 Fiber optic in-situ sensor for accurate monitoring the discharge quantity of lead-acid batteries

Yunxin Hu, Zifan Huang, Siyu Qian, Shengchun Liu

Proceedings Volume 12757, 3rd International Conference on Laser, Optics, and Optoelectronic Technology (LOPET 2023); 1275733 (2023) https://doi.org/10.1117/12.2690783
Event: 3rd International Conference on Laser, Optics and Optoelectronic Technology (LOPET 2023), 2023, Kunming, China

Abstract

Contemporary battery management systems (BMS) rely on monitoring external parameters such as voltage and current to ensure that the battery operates safely and has the required performance, often resulting in overdesign and inefficient capacity usage. Embedded sensors can be used for internal battery condition monitoring to provide accurate operating status information and state of charge. This paper presents an embedded optical sensing method using a tiny fiber optic sensor implanted inside a lead-acid battery. Under the premise of not affecting the performance of the battery, the refractive index sensitive characteristics of the inclined grating are used to monitor and feedback the electrolyte concentration in the process of battery discharge in real time. The tilted fiber Bragg grating(TFBG) sensor can provide on-line feedback of discharge through transmission spectrum. And it can also realize the high sensitivity online monitoring of the discharge quantity of lead-acid battery, which provides a convenient method for researchers and engineers to manage the battery.

Citation Download Citation

Yunxin Hu, Zifan Huang, Siyu Qian, and Shengchun Liu "Fiber optic in-situ sensor for accurate monitoring the discharge quantity of lead-acid batteries", Proc. SPIE 12757, 3rd International Conference on Laser, Optics, and Optoelectronic Technology (LOPET 2023), 1275733 (17 August 2023); https://doi.org/10.1117/12.2690783

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