The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 15, 1998
Filed:
Dec. 19, 1996
Applicant:
Inventor:
John W Lundstrom, Glendora, CA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01M / ; G01N / ;
U.S. Cl.
CPC ...
320 32 ; 320 21 ; 320 48 ; 324433 ;
Abstract
A backup battery charger measures charging capacitor voltage and charging battery current to calculate battery charging circuit resistance and open circuit float battery voltage. Microcontroller computation of the backup battery float battery voltage and battery charging circuit resistance changes enable efficient charging and monitoring of battery conditions.