Title:
電池電圧検出装置
Document Type and Number:
Japanese Patent JP6593226
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To ensure that the cell voltages of a plurality of cells connected in series do not significantly vary between each cell.SOLUTION: Provided is a battery voltage detector including a plurality of cells connected in series and also including for each cell a differential amplification circuit operating on the basis of the potential of a lowest order detection line as a point of reference that is connected to the negative pole of a lowest order cell whose potential is lowest among the plurality of cells, and differentially amplifying the cell voltage of a corresponding cell among the plurality of cells. A connection point between adjacent cells among the plurality of cells is connected, via an intercell detection line connected to the connection point, to a differential amplification circuit for differentially amplifying the cell voltage of a cell out of the adjacent cells whose potential is lower and a differential amplification circuit for differentially amplifying the cell voltage of a cell out of the adjacent cells whose potential is higher. A resistive element for pulling up the intercell detection line to a highest order detection line connected to the positive pole of a highest order cell whose potential is highest among the plurality of cells is provided for each intercell detection line.SELECTED DRAWING: Figure 1
Inventors:
Minoru Hida
Application Number:
JP2016040350A
Publication Date:
October 23, 2019
Filing Date:
March 02, 2016
Export Citation:
Assignee:
TOYOTA JIDOSHA KABUSHIKI KAISHA
International Classes:
G01R19/00; G01R31/3835; G01R31/385; G01R31/396; H01M10/44; H01M10/48; H02J7/02
Domestic Patent References:
| JP11233154A | ||||
| JP2000356656A | ||||
| JP2000014027A | ||||
| JP2015036649A | ||||
| JP2007010465A |
Foreign References:
| US5313152 |
Attorney, Agent or Firm:
Tadashige Ito
Tadahiko Ito
Tadahiko Ito