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:
Apr. 14, 2015
Filed:
Aug. 12, 2011
Atsushi Sakurai, Chiba, JP;
Toshiyuki Koike, Chiba, JP;
Kazuaki Sano, Chiba, JP;
Fumihiko Maetani, Chiba, JP;
Atsushi Sakurai, Chiba, JP;
Toshiyuki Koike, Chiba, JP;
Kazuaki Sano, Chiba, JP;
Fumihiko Maetani, Chiba, JP;
Seiko Instruments Inc., Chiba, JP;
Abstract
Provided is a battery device including, in a charge/discharge protection circuit for controlling charge/discharge of a secondary battery by a single bidirectionally conductive field effect transistor, a charge/discharge control circuit with which the number of elements to be used is reduced to reduce the layout area. The charge/discharge control circuit includes a switch circuit for controlling a gate of the bidirectionally conductive field effect transistor based on an output of a control circuit for controlling the charge/discharge of the secondary battery, the switch circuit including a first terminal connected to a back gate of the bidirectionally conductive field effect transistor.