Title:
CURRENT DETECTION CIRCUIT AND STORAGE BATTERY SYSTEM
Document Type and Number:
Japanese Patent JP2014228487
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a current detection circuit capable of highly accurately detecting currents without causing the complication of a circuit and a significant cost increase.SOLUTION: A current detection circuit 12 includes: an amplifier circuit 22a in which an operational amplifier OP1 is disposed for amplifying currents detected by a current detection element 21a; an amplifier circuit 22b in which an operational amplifier OP2 having temperature characteristics equivalent to those of the operational amplifier OP1 is disposed for amplifying the currents detected by the current detection element 21b; inversion means (polarity inversion part 24a or the like) for inverting the polarity of the input of one of the amplifier circuits 22a and 22b, and for inverting the polarity of the output of one of the amplifier circuits 22a and 22b; and an arithmetic part 24 for calculating the mean value of the output of one of the amplifier circuits 22a and 22b whose polarity has been inserted by the inversion means and the output of the other of the amplifier circuits 22a and 22b.
Inventors:
TOMARU NOZOMI
NAKAGAWA MASAYO
SASAKI YUJI
NAKAGAWA MASAYO
SASAKI YUJI
Application Number:
JP2013110253A
Publication Date:
December 08, 2014
Filing Date:
May 24, 2013
Export Citation:
Assignee:
IHI CORP
International Classes:
G01R19/00; H01M10/48; H02J7/00
Attorney, Agent or Firm:
Mitsuo Teramoto
Masatake Shiga
Hisanori Takahashi
Masatake Shiga
Hisanori Takahashi