Title:
SECONDARY BATTERY STATE DETECTION DEVICE
Document Type and Number:
Japanese Patent JP2017032349
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a secondary battery state detection device with which it is possible to accurately detect the states of a plurality of secondary batteries constituting a battery pack.SOLUTION: One pole plate of each of first and second capacitors Co1, Co2 is connected to one pole of one secondary battery Cen out of a plurality of secondary batteries Ce1-Ce4. First switches SW11, SW12 connect the other pole of one secondary battery Cen to the other pole plate of one of the first capacitor Co1 and the second capacitor Co2. An MUC 5 connects, controlling the first switches SW11, SW12, the other pole of one secondary battery Cen to the other pole plate of the first capacitor Co1 when the plurality of secondary batteries Ce1-Ce4 are in a first state, and then connects the other pole of one secondary battery Cen to the other pole plate of the second capacitor when the plurality of secondary batteries Ce1-Ce4 are in a second state. A differential amplification circuit 6 outputs a differential voltage of the other pole plate voltages of the first capacitor Co1 and second capacitor Co2. A battery monitoring IC 7 detects the state of the secondary batteries Ce1-Ce4 on the basis of the differential voltage.SELECTED DRAWING: Figure 1
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Inventors:
TAKAHASHI YUICHI
SHODA TAKAHIRO
TAKAHASHI NOBUYUKI
SAITO AYAKO
SAIGO TSUTOMU
FUJII HIRONAO
WANG JIAN
SHODA TAKAHIRO
TAKAHASHI NOBUYUKI
SAITO AYAKO
SAIGO TSUTOMU
FUJII HIRONAO
WANG JIAN
Application Number:
JP2015150918A
Publication Date:
February 09, 2017
Filing Date:
July 30, 2015
Export Citation:
Assignee:
YAZAKI CORP
International Classes:
G01R31/36; H01M10/44; H01M10/48; H02J7/00; H02J7/02
Domestic Patent References:
| JP2014219311A | 2014-11-20 | |||
| JP2001178008A | 2001-06-29 | |||
| JPH10225005A | 1998-08-21 | |||
| JP2014169913A | 2014-09-18 | |||
| JP2007060792A | 2007-03-08 |
Foreign References:
| US20080084217A1 | 2008-04-10 |
Attorney, Agent or Firm:
Hideo Takino
Takao Kawasaki
Fumio Takino
Toshiaki Tsuda
Masashi Torino
Takao Kawasaki
Fumio Takino
Toshiaki Tsuda
Masashi Torino