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:
Dec. 15, 2009
Filed:
Jun. 23, 2005
Mitsunori Ishii, Sagamihara, JP;
Mitsunori Ishii, Sagamihara, JP;
NEC Corporation, Tokyo, JP;
Fuji Jukogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
An internal impedance detecting apparatus for detecting the internal impedance of a secondary battery with high accuracy is provided. Processordivides the variation of each voltage detected by voltage change detectorby the variation of the current detected by current change detectorfor the same detecting time as that for the voltage variations to compute the internal impedances. Judging unitchecks the variations of the internal impedances computed by processorand judges from the check result whether or not the internal impedances have reliability. Only when judging unitjudges that the internal impedances have reliability, generatorgenerates output internal impedance according to the internal impedances.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile