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Proceedings Paper

Density measurement in automotive batteries by means of optoelectronic sensors
Author(s): Ana Cao Paz; Jorge Marcos Acevedo; Jesus Doval Gandoy
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Paper Abstract

Lead-acid batteries are an energy storage system used in automotive sector, electric traction, communication remote control, etc. In all of this applications, and specially in remote control, is interested to know, among other variables, the electrolyte density. This measurement allow us to manage a battery or a set of batteries. In this work we present an optoelectronic sensor developed for the measurement of the lead-acid electrolyte density. The sensor has an optical emitter-receiver pair, two plastic optical fibers and the electronic circuit. One fiber is used like a reference in order to minimize the possible common mode errors, due temperature, power supplies, etc. The other fiber is the sensitive fiber and the measurements are taken with it, the functioning principle is an U bend configuration which allows losses due the refraction to the surrounding liquid, this losses depends on the liquid density (electrolyte density). Several tests were done with different conditions and different charging and discharging strategies, the results demonstrate the validity of this technique for the lead-acid electrolyte density measurement with a good stability in the time.

Paper Details

Date Published: 9 June 2004
PDF: 5 pages
Proc. SPIE 5502, Second European Workshop on Optical Fibre Sensors, (9 June 2004); doi: 10.1117/12.566615
Show Author Affiliations
Ana Cao Paz, Univ. of Vigo (Spain)
Jorge Marcos Acevedo, Univ. of Vigo (Spain)
Jesus Doval Gandoy, Univ. de Vigo (Spain)

Published in SPIE Proceedings Vol. 5502:
Second European Workshop on Optical Fibre Sensors
Jose Miguel Lopez-Higuera; Brian Culshaw, Editor(s)

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