Universal battery charging system and a method

Patent 4843299 Issued on June 27, 1989. Estimated Expiration Date:

June 1, 2007. 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

3517294

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Inventor

Hutchings, Phillip D.

Assignee

Power-Tech Systems Corporation

Application

No. 07/055795 filed on 06/01/1987

US Classes:

320/125, DIVERSE CHARGING OR DISCHARGING RATES FOR PLURAL BATTERIES320/127, BATTERY OR CELL DISCHARGING320/142, Phase controlled320/152, Detection of current or voltage amplitude320/160Multi-rate charging (e.g., plural charge rates before a maintenance charge, etc.)

Examiners

Primary: Hickey, R. J.

Attorney, Agent or Firm

International Class

H02J 7/00 (20060101)

Abstract

A universal battery charger and recharger for electric batteries having different charging characteristics. The battery charger includes a microprocessor receiving inputs from current, voltage and temperature sensors for controlling the battery charging profile. A replaceable memory may be included to provide an appropriate charging profile for the battery to be charged. The supply current is varied responsively to the voltage across the battery which is measured when the supply current reaches a predetermined level or after a predetermined time.