Title:
内部インピーダンス検出装置、内部インピーダンス検出方法、劣化度検出装置および劣化度検出方法
Document Type and Number:
Japanese Patent JP4778431
Kind Code:
B2
Abstract:
An internal impedance detecting apparatus for detecting the internal impedance of a secondary battery with high accuracy is provided. Processor 106 divides the variation of each voltage detected by voltage change detector 103 by the variation of the current detected by current change detector 105 for the same detecting time as that for the voltage variations to compute the internal impedances. Judging unit 107 checks the variations of the internal impedances computed by processor 106 and judges from the check result whether or not the internal impedances have reliability. Only when judging unit 107 judges that the internal impedances have reliability, generator 109 generates output internal impedance according to the internal impedances.
Inventors:
Mitsunori Ishii
Application Number:
JP2006531311A
Publication Date:
September 21, 2011
Filing Date:
June 23, 2005
Export Citation:
Assignee:
NEC
Fuji Heavy Industries Ltd.
Fuji Heavy Industries Ltd.
International Classes:
G01R31/36; B60R16/04
Attorney, Agent or Firm:
Akio Miyazaki
Ishibashi Masayuki
Masaaki Ogata
Ishibashi Masayuki
Masaaki Ogata