Smart battery algorithm for reporting battery parameters to an external device

Patent 5606242 Issued on February 25, 1997. Estimated Expiration Date:

October 4, 2014. 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 testing apparatus
Patent #: 3971980
Issued on: 07/27/1976
Inventor: Jungfer , et al.

Laser programmable read only memory
Patent #: 4238839
Issued on: 12/09/1980
Inventor: Redfern , et al.

Rechargeable electric battery system
Patent #: 4289836
Issued on: 09/15/1981
Inventor: Lemelson

Method and device for monitoring the state of charge of a storage battery
Patent #: 4307330
Issued on: 12/22/1981
Inventor: Belot

Microprocessor-based state of charge gauge for secondary batteries
Patent #: 4333149
Issued on: 06/01/1982
Inventor: Taylor , et al.

System for measuring state of charge of storage battery
Patent #: 4377787
Issued on: 03/22/1983
Inventor: Kikuoka , et al.

Battery monitor circuit
Patent #: 4387334
Issued on: 06/07/1983
Inventor: Loper

Monitoring apparatus and method for battery power supply
Patent #: 4390841
Issued on: 06/28/1983
Inventor: Martin , et al.

Method of charging batteries and apparatus therefor
Patent #: 4392101
Issued on: 07/05/1983
Inventor: Saar , et al.

Portable battery powered system
Patent #: 4455523
Issued on: 06/19/1984
Inventor: Koenck

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Inventors

Assignee

Duracell Inc.

Application

No. 318004 filed on 10/04/1994

US Classes:

320/106, MEANS TO IDENTIFY CELL OR BATTERY TYPE320/151, Detection of current or voltage differential (e.g., slope, etc.)324/426, Using a battery testing device429/40, Catalytic electrode structure or composition702/63Battery monitoring

Examiners

Primary: Wong, Peter S.
Assistant: Toatley, Gregory J. Jr.

Attorney, Agent or Firm

Scully, Scott, Murphy & Presser

International Class

H02J 007/04

Abstract

A smart battery which provides electrical power and which reports predefined battery parameters to an external device having a power management system, includes: at least one rechargeable cell connected to a pair of terminals to provide electrical power to an external device during a discharge mode and to receive electrical power during a charge mode, as provided or determined by the remote device; a data bus for reporting predefined battery identification and charge parameters to the external device; analog devices for generating analog signals representative of battery voltage and current at said terminals, and an analog signal representative of battery temperature at said cell; a hybrid integrated circuit (IC) having a microprocessor for receiving the analog signals and converting them to digital signals representative of battery voltage, current and temperature, and calculating actual charge parameters over time from the digital signals, the calculations including one calculation according to the following algorithm;CAPrem =CAPFC -ΣId Ɗtd -ΣIs Ɗt+Σ&3xb5;c Ic Ɗtcwherein &3xb5;c is a function of battery current and temperature; and Is is a function of battery temperature and CAPFC. Superimposed on this equation is reset logic, that self corrects the value of CAPFC with a capacity calculation at each full charge (EOC) and each end of full discharge.

Other References

M. Bullinger, "Quick Charging with Intelligence an IC Controls NiCd and NiHM Battery Chargers", Elektronik, vol. 42, No. 6, pp. 74-77 (1993)
P. Guerile, "Integrated Circuits for Rapid Chargers", Electronique Radio Plans, No. 543, pp. 57-64 (1993