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Patent Searching and Data


Title:
BATTERY SYSTEM FOR VEHICLE
Document Type and Number:
WIPO Patent Application WO2010109990
Kind Code:
A1
Abstract:
A battery system for a vehicle is provided with discharge circuits (R1, 129A - 129D, 128A - 128D) which discharge battery cells (BC1 - BC4) via measurement lines of said battery cells (BC1 - BC4). A control circuit transmits to an integrated circuit (3A) a first discharge command which causes the odd numbered battery cells (BC1, BC3) in a cell group (GB1) to discharge; a first transmission command which causes the terminal voltage of only the odd numbered battery cells (BC1, BC3) measured at the time of execution of the first discharge command to be transmitted to the control circuit; a second discharge command which causes the even numbered battery cells (BC2, BC4) in the cell group (GB1) to discharge; and a second transmission command which causes the terminal voltage of only the even numbered battery cells (BC2, BC4) measured at the time of execution of the second discharge command to be transmitted to the control circuit. Based on the terminal voltages variously transmitted to the integrated circuit (3A), the control circuit diagnoses abnormalities in the system which includes the battery cells, measurement lines, and discharge circuits.

Inventors:
KIKUCHI MUTSUMI (JP)
KUDO AKIHIKO (JP)
SHIBAHARA GOSUKE (JP)
AOSHIMA YOSHINORI (JP)
KUBO KENJI (JP)
UEMURA YASUO (JP)
Application Number:
PCT/JP2010/052467
Publication Date:
September 30, 2010
Filing Date:
February 18, 2010
Export Citation:
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Assignee:
HITACHI LTD (JP)
HITACHI VEHICLE ENERGY LTD (JP)
KIKUCHI MUTSUMI (JP)
KUDO AKIHIKO (JP)
SHIBAHARA GOSUKE (JP)
AOSHIMA YOSHINORI (JP)
KUBO KENJI (JP)
UEMURA YASUO (JP)
International Classes:
B60R16/04; B60L3/00; G01R31/02; G01R31/36; H01M10/48; H02J7/00; H02J7/02
Foreign References:
JP2003134684A2003-05-09
JP2003134685A2003-05-09
JP2007129864A2007-05-24
JP2005318751A2005-11-10
JP2006294339A2006-10-26
JP2009076785A2009-04-09
Other References:
See also references of EP 2412581A4
Attorney, Agent or Firm:
NAGAI, Fuyuki (JP)
Fuyuki Nagai (JP)
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