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:
Nov. 09, 1999
Filed:
Mar. 05, 1998
Applicant:
Inventors:
Assignee:
Sony Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02J / ; G05B / ; H02M / ;
U.S. Cl.
CPC ...
320164 ; 323354 ; 363 47 ;
Abstract
A battery charging system detects a secondary battery terminal voltage and selectively controls a first switch to connect/disconnect a series-connected smoothing capacitor and resistor to ground to present an impedance greater than the battery impedance and further controls a second switch to connect/disconnect a charging control circuit in series between the voltage supply and the secondary battery being charged.