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:
Mar. 13, 2012
Filed:
Jul. 25, 2007
Kazuki Morita, Osaka, JP;
Kazuki Morita, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
An electric storage device is disclosed, this device can balance voltages across each one of energy storage devices with each other in a short time even if the voltages disperse in a wide range, and also it can reduce needless power consumption. This device includes the energy storage devices and an equalizing voltage circuit coupled in parallel with the energy storage devices. The equalizing voltage circuit includes a balancing resistor, a balancing switch coupled between respective energy storage devices and respective balancing resistors, a discharging resistor coupled in parallel with the respective energy storage devices and having a smaller resistance value than the balancing resistor, and a discharging switch coupled between the respective energy storage devices and the respective discharging resistors. All the balancing switches and all the discharging switches are turned on during the charge to the energy storage devices, and after the voltages across the respective energy storage devices can be balanced with each other, all the discharging switches alone are turned off.
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