公开(公告)号：EP1995123A4

公开(公告)日：2010-05-05

申请号：EP07738043

申请日：2007-03-08

申请人： SHIN KOBE ELECTRIC MACHINERY

发明人： MACHIYAMA YOSHIAKI ,  YAMADA KEIZO ,  YAMADA YOSHIFUMI ,  HARA TAKASHI

IPC分类号： B60R16/04 ,  B60L3/00 ,  G01R31/36 ,  H01M10/48

CPC分类号： G01R31/3668 ,  B60L11/1861 ,  G01R31/362 ,  G01R31/3648 ,  G01R31/3662 ,  G01R31/3675 ,  H01M10/06 ,  H01M10/48 ,  H01M10/486 ,  Y02E60/126 ,  Y02T10/7016 ,  Y02T10/7044 ,  Y02T10/705

摘要： The present invention provides a battery state determining apparatus which can determine a battery state of a lead battery from an engine starting voltage accurately considering influence of a temperature of a vehicle. An engine starting voltage Vst1 obtained by correcting an engine starting voltage Vst of a lead battery at an engine starting time is calculated based upon an open-circuit voltage OCV and a temperature of a vehicle(S112), a battery determination voltage Vst_th representing a voltage of the lead battery at an engine starting time when a growth rate of internal resistance of the lead battery reaches a predetermined value from the open-circuit voltage OCV is calculated (S126), and a battery state of the lead battery is determined by determining whether an engine starting voltage Vst1 belongs to a predetermined region on a characteristic map (S132). A temperature of the lead battery measured after at least a predetermined time elapsing from engine stopping is regarded as temperature of the vehicle so that the engine starting voltage Vst1 is calculated.