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:
May. 03, 1977
Filed:
Mar. 17, 1975
Applicant:
Inventors:
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02J / ; H02M / ;
U.S. Cl.
CPC ...
320 39 ; 321-2 ; 321 18 ; 320 21 ; 320 23 ;
Abstract
There is provided a charging system for secondary batteries comprising a high-frequency power supply circuit consisting of a transistor DC-DC converter and a control circuit for preventing the overcharging of a battery to be charged, whereby the oscillation of the high-frequency power supply circuit is controlled by the control circuit. Thus, the size and weight of the charging system of this invention are reduced.