Battery monitoring system

  • US 4,820,966 A
  • Filed: 06/13/1988
  • Issued: 04/11/1989
  • Est. Priority Date: 06/13/1988
  • Status: Expired due to Fees
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First Claim
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1. A device for monitoring charging and discharging currents of a storage battery together with its controls, said device comprising:

  • a current sensing resistor (shunt) adapted to be connnected in series with a battery, the voltage and its polarity across said resistor being proportional to charging and discharging current through the battery and the direction of its flow,a first amplifier means responsive only to signals across said resistor indicating discharge current flow through the battery for providing a first amplified voltage,a second amplifier means responsive only to signals across said resistor indicating charging current flow through the battery for providing a second amplified voltage,first and second voltage to frequency converters one for each of said first and said second amplifier means, each providing a train of pulses at a frequency proportional to the value of the first and second amplified voltage,a microprocessor connected to receive the train of pulses from each of the first and second frequency converters and embodying a stored program for interpreting the first and second train of pulses and generating signals responsive thereto, andrelay means connected to said microprocessor for responding to said generated signals.

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