Apparatus for detecting batteries in an uninterruptible power supply by utilizing voltage drop rate

Abstract

In order to maintain normal states of machines during cutoff of electric power, an uninterruptible power supply (UPS) is required for a short time before a power generator starts to send out electric power. For normal functioning of a UPS, it is necessary to periodically detect the state of each battery thereof. In addition to measuring the variation of voltage and current of a battery by using a microprocessor, a sensor, and an analog-to-digital converter (ADC), the variation of voltage versus time (i.e., the voltage drop rate) of the battery during discharge is also measured. In other words, the voltage drop rate of a battery is measured as a standard for determining whether the battery is applicable to the UPS.

Dependencies are inferred from the claim text.