Battery (electricity)

Quantum mechanics

Engineering

State of charge

Materials science

Lead–acid battery

Optical fiber

Applied mathematics

Telecommunications

Power (physics)

Computer science

Physical chemistry

Physics

Mathematics

Multi point

Chemistry

Electrode

Electrolyte

Electrical engineering

Sensors

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.

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