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Sensors 2010, 10(4), 2587-2608; doi:10.3390/s100402587

A Multi-Point Sensor Based on Optical Fiber for the Measurement of Electrolyte Density in Lead-Acid Batteries

Department of Electronic Technology, University of Vigo, 36310 Vigo, Spain
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Received: 26 January 2010 / Revised: 10 March 2010 / Accepted: 16 March 2010 / Published: 25 March 2010
(This article belongs to the Section Chemical Sensors)

Abstract

This article describes a multi-point optical fiber-based sensor for the measurement of electrolyte density in lead-acid batteries. It is known that the battery charging process creates stratification, due to the different densities of sulphuric acid and water. In order to study this process, density measurements should be obtained at different depths. The sensor we describe in this paper, unlike traditional sensors, consists of several measurement points, allowing density measurements at different depths inside the battery. The obtained set of measurements helps in determining the charge (SoC) and state of health (SoH) of the battery.
Keywords: plastic optical fiber; bending losses; electrolyte density; liquid level; lead acid batteries; state of charge; battery maintenance plastic optical fiber; bending losses; electrolyte density; liquid level; lead acid batteries; state of charge; battery maintenance
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This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Cao-Paz, A.M.; Marcos-Acevedo, J.; Del Río-Vázquez, A.; Martínez-Peñalver, C.; Lago-Ferreiro, A.; Nogueiras-Meléndez, A.A.; Doval-Gandoy, J. A Multi-Point Sensor Based on Optical Fiber for the Measurement of Electrolyte Density in Lead-Acid Batteries. Sensors 2010, 10, 2587-2608.

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