Charge equalizer or series of connected battery strings

Patent 6008623 Issued on December 28, 1999. Estimated Expiration Date:

March 16, 2019. 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.

Abstract Claims Description Full Text

Patent References

Battery charging using a transformer with a single primary winding and plural secondary windings Patent #: 5659237
Issued on: 08/19/1997
Inventor: Divan, et al.

Inventors

Application

No. 270651 filed on 03/16/1999

US Classes:

320/118, With discharge of cells or batteries320/119With individual charging of plural batteries or cells

Examiners

Primary: Tso, Edward H.

Attorney, Agent or Firm

Smith, Gambrell & Russell, LLP

International Class

H01M 010/46

Foreign Application Priority Data

1998-11-30 TW

Abstract

A charge equalizer adapted a battery charger to equally charge series of connected battery strings, comprising battery voltage sensing circuits, a microcontroller, logic and driving circuits, and flyback converters, operates to prevent the batteries of the series of connected battery strings from overcharging by activating the flyback converters to draw out the overcharging currents of the batteries in the series of connected battery strings and charging the whole battery strings by recharging currents which proportion to said drawn out currents as detecting each of the battery voltages in the battery strings being higher than a pre-determined voltage value during charging and digitizing the detected battery voltage signals; so as to achieve the purposes of equal charge in each battery and hence to improve the life of the battery strings as a whole.