Automatic Measurement for Internal Resistance of Battery in Uninterruptible Power Source

This paper considers the approach to the measurement of internal resistance of the battery in the uninterruptible power sources (UPSs [1]). Advantages of the approach are the measurements in power supplies without switching-off the battery, simplicity in realization of algorithm. The basic expressions of the theory used in the method about internal resistance of the storage battery are considered. The function chart of construction of an analog part of the scheme, and also algorithm of action of the scheme of logic of decision-making are considered. Construction of the tracing generator of load, the important part in realization of the method is stated. The use of the analog machine for processing of the results of measurements and a differential method of measurement with the purpose of increase the accuracy of the method is offered. Key wordsUPS, internal resistance of battery, measuring algorithm, tracing load generator, analog machine, decision logic, differential measuring.