Design and development of a battery cell voltage monitoring system

Abstract

The purpose of this project was to investigate various methods that would allow accurate measurement of individual cell voltages that are all connected in series to make up a battery pack. Methods such as isolation amplifiers, opto-isolaters, DC-to-DC converters and a series of new chips designed specifically to do this task, were all evaluated in terms of complexity, performance, measurement range, accuracy, size and in particular cost.