Battery charger for charging a plurality of batteries
May 9, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesCharging system and method for multicell storage batteries Method of equalizing the voltages of the individual cells of storage batteries Uninterruptible power supply Standby power system AC-DC Switching regulator uninterruptible power supply Battery charger for plural cell holding modules Unique computer power system with backup power Patent #: 4885521 InventorAssigneeApplicationNo. 349309 filed on 05/09/1989US Classes:320/119, With individual charging of plural batteries or cells307/46, Storage battery or accumulator-type source320/124, SEQUENTIAL CHARGING OR DISCHARGING OF BATTERIES OR CELLS320/130Cycling (e.g., discharge/charge cycle, etc.)ExaminersPrimary: Wong, Peter S.Assistant: Peckman, Kristine Attorney, Agent or FirmInternational ClassH02J 007/08AbstractA battery charging apparatus that charges a plurality of batteries to equal voltage levels. The apparatus has a transformer that acts as a flyback circuit to charge the plurality of batteries. The transformer has a primary winding and a plurality of secondary winding circuits, each secondary winding circuit having a secondary winding and a diode. A different secondary winding circuit is coupled across each battery. The diodes cause only the battery having the lowest voltage among the plurality of batteries to receive energy on a transformer pulse. This occurs until that battery is charged to the level of the next lowest voltage battery, at which time both batteries will receive energy during the pulse. The sequence is followed until all the batteries are charged equally and to a predetermined threshold level. | |
