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. 03, 2018
Filed:
Aug. 06, 2014
Hitachi Automotive Systems, Ltd., Hitachinaka-shi, Ibaraki, JP;
Hiroshi Iwasawa, Tokyo, JP;
Akihiko Kudo, Hitachinaka, JP;
Mitsuo Noda, Hitachinaka, JP;
Mutsumi Kikuchi, Hitachinaka, JP;
Tomonori Kanai, Hitachinaka, JP;
HITACHI AUTOMOTIVE SYSTEMS, LTD., Ibaraki, JP;
Abstract
Even with a large ripple voltage superposed on a voltage of a battery cell, the voltage of the battery cell can be measured accurately. In a battery monitoring device, a supply circuit, based on a reference voltage inputted from an assembled battery, generates a driving voltage for driving each of switching elements, of a selection circuit and supplies the driving voltage to the selection circuit. The reference voltage is inputted from the assembled battery to the supply circuit via a detecting filter circuit. As a result, a time constant of a route through which the reference voltage is inputted from the assembled battery to the supply circuit is approximately equal to time constants of detecting filter circuits.