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. 13, 2018
Filed:
May. 16, 2016
Sii Semiconductor Corporation, Chiba-shi, Chiba, JP;
Hiroyuki Masuko, Chiba, JP;
ABLIC INC., Chiba, JP;
Abstract
To provide a constant current charging device capable of shortening a total charging time of a secondary battery even if an internal impedance of the secondary battery becomes high. A constant current charging device is provided which is equipped with a charging completion voltage detector, a battery voltage drop detector, an up-down counter which adds data when the up-down counter receives a detection signal of the charging completion voltage detector, subtracts the data when the up-down counter receives a detection signal of the battery voltage drop detector, and outputs the subtracted data, and a constant current generating circuit which switches a charging current to a secondary battery according to the data outputted from the up-down counter.