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Battery equalization circuit with ramp converter

  • US 5,666,041 A
  • Filed: 08/27/1996
  • Issued: 09/09/1997
  • Est. Priority Date: 08/27/1996
  • Status: Expired due to Fees
First Claim
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1. An electronic battery equalization circuit for equalizing voltages of a plurality of batteries in a battery pack, comprising:

  • a current source for supplying a charging current during a first half cycle and a second half cycle;

    a transformer connected to said current source;

    a primary circuit connected to said transformer, said primary circuit comprising a primary winding, an inductor connected in series to the primary winding, a current transformer connected in series to the inductor and a pair of semiconductor devices; and

    at least one secondary circuit connected to said transformer comprising a secondary winding being coupled to a different pair of batteries of the plurality of batteries, a pair of diodes connected in series, each diode being connected to a different battery of the plurality of batteries, and a capacitor being connected across the different battery of the plurality of batteries,wherein the charging current from said current source is supplied to at least one battery in a first half of the battery pack during the first half cycle, andwherein a charging current from said current source is supplied to at least one battery in a second half of the battery pack during the second half cycle.

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