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. 06, 2014
Filed:
Oct. 27, 2011
Masatoshi Uno, Sagamihara, JP;
Akio Kukita, Sagamihara, JP;
Kazushige Ito, Fussa, JP;
Tsutomu Sekido, Fussa, JP;
Kaoru Nagata, Fussa, JP;
Kazuhiro Shoji, Fussa, JP;
Masatoshi Uno, Sagamihara, JP;
Akio Kukita, Sagamihara, JP;
Kazushige Ito, Fussa, JP;
Tsutomu Sekido, Fussa, JP;
Kaoru Nagata, Fussa, JP;
Kazuhiro Shoji, Fussa, JP;
Japan Aerospace Exploration Agency, Tokyo, JP;
Japan Capacitor Industrial Co., Ltd., Tokyo, JP;
Abstract
It is an object to provide a circuit for equalizing voltages of energy storage cells, with less number of element and simpler circuit configuration than ever before. A plurality of field-effect transistors are arranged such that each of a plurality of parallel circuits formed, in one of connection states attained by switching of the switches, by connecting in parallel energy storage cells to perform mutual charging and discharging, includes a field-effect transistor adapted to avoid blocking a current having one of opposite polarities in the each of the plurality of parallel circuits, and a field-effect transistor adapted to avoid blocking a current having the other polarity in the each of the plurality of parallel circuits. This makes it possible to perform a voltage equalization operation using a small number of transistors.