Battery Testing- Monitoring

A Battery Tester provides meaningful data on battery health without significant expense or reduction in remaining battery capacity. A Battery Tester is typically designed for on-line ac impedance and dc terminal voltage measurement of secondary batteries. The battery tester works by applying a test current across the battery string while on-line, then measuring the total current (ac ripple + test current) and the voltage drop of each cell. It then calculates the impedance. They also measure dc voltage and interconnection (strap) resistance to help determine the overall condition of the entire battery string^^s electrical path from terminal plate to terminal plate.

A Battery Tester is designed to tell us things we want to know about individual cells and batteries.

Some typical questions are:

Is it fully charged?
How much charge is left in the battery?
Does it meet the manufacturer^^s specification?
Has there been any deterioration in performance since it was new?
How long will it last?
Do the safety devices all work?
Does it generate interference or electrical noise?
Is it affected by interference or electrical noise?

An improved battery tester for determining the acceptability of a Lithium Sulfur Dioxide (LiSO2) storage battery at a given temperature and with one or more cells therein. The tester is generally made up of a first comparison circuit having a series of series interconnected components, namely a comparator, first and second flip-flops, and an AND gat. A first resistor is parallel connected to the first comparison circuit.