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Bidirectional battery state-of-charge monitor

  • US 4,740,754 A
  • Filed: 01/13/1986
  • Issued: 04/26/1988
  • Est. Priority Date: 01/13/1986
  • Status: Expired due to Term
First Claim
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1. A bidirectional battery state-of-charge monitor comprising a circuit including an integrator for storing a state-of-charge measurement;

  • and a charge signal channel and a separate discharge signal channel both connected to said integrator and both arranged for connection to receive a battery terminal voltage signal, said charge signal channel including comparison means operable in response to a battery terminal voltage signal above a charge threshold function voltage to produce a charge output signal to change the integrated measurement in the integrator in a first direction to indicate an increased charge, the discharge signal channel including comparison means operable in response to a battery terminal voltage signal below a discharge threshold function voltage to produce a discharge output signal to change the integrated measurement in the integrator in a second direction to indicate a decreased charge, both said charge and discharge threshold function voltages being functions of the stored integrator state-of-charge measurement.

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