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:
Jul. 20, 1993
Filed:
Jul. 30, 1991
Tadashi Kato, Chiba, JP;
Nippon Densan Corporation, Kyoto, JP;
Abstract
A charging control circuit having a controller including a microcomputer, a charging circuit, detectors for detecting the voltages between the terminals of batteries, and memories for storing charge control data. The controller determines that quick charging is completed when the voltage between the terminals of each battery drops from a peak value to an extent corresponding to a predetermined value stored in the memory, and then terminates the charging operation. During a predetermined period of insensible time immediately after the start of charging stored in the memory, the controller does not detect the voltage to determine whether or not each battery is fully charged, thereby preventing an error in determining a fully charged state of the battery. If a full charge of each battery is not detected while quick charging is continued for a certain period of time stored in the memory, the controller forcibly terminates the quickly charging operation. Desired data is selected from the control data stored in the memories in response to an external signal, and the charge control is optimized according to the number of batteries and other factors.