Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Electrical signal parameter measurement system
Reexamination Certificate
2007-03-08
2011-10-11
Nghiem, Michael (Department: 2857)
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Electrical signal parameter measurement system
C320S136000, C340S636190
Reexamination Certificate
active
08036839
ABSTRACT:
A battery state determining apparatus is provided which can accurately determine a state of a lead battery in an automotive vehicle. The apparatus calculates a corrected engine starting voltage Vst1from an open-circuit voltage (OCV) measuring section that measures the open circuit voltage Vst of the lead battery at an engine starting time in accordance with a temperature of the vehicle. The apparatus further calculates 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. The apparatus then determines the battery state of the lead battery by determining whether the corrected engine starting voltage Vst1is larger than the battery determination voltage Vst_th and whether the corrected engine starting voltage Vst1belongs to a predetermined region on a characteristic map.
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Hara Takashi
Machiyama Yoshiaki
Yamada Keizo
Yamada Yoshifumi
Le Toan
Nghiem Michael
Roberts Mlotkowski Safran & Cole P.C.
Shin-Kobe Electric Machinery Co. Ltd.
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