Abnormality detection device for assembled battery

Each detection unit (20(i)) is configured to compare a voltage output from a battery cell (CL(i)) associated therewith with a predetermined criterion voltage. A plurality of detection units (20) operate sequentially in response to a start trigger (TRG) and also sequentially transmit a signal (OD) th...

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Bibliographic Details
Main Author ISHISHITA TERUO
Format Patent
LanguageEnglish
Published 25.03.2015
Subjects
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
TESTING
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Abstract Each detection unit (20(i)) is configured to compare a voltage output from a battery cell (CL(i)) associated therewith with a predetermined criterion voltage. A plurality of detection units (20) operate sequentially in response to a start trigger (TRG) and also sequentially transmit a signal (OD) that reflects a result of comparing the voltages to detect whether a battery pack (10) has a low cell voltage fault. A fault monitoring device (30) detects an internal resistance fault when it receives from a transmission circuit (25) a determination signal (FV) indicating that the battery pack when electrically discharged has any of its battery cells (CLs) outputting a voltage decreased to be lower than the criterion voltage and if a current detected has a value (Ib) smaller in magnitude than a criterion current corresponding to a value of a current obtained by dividing a difference in voltage between an open circuit voltage of the battery cell and the criterion voltage by an upper limit value for internal resistance.
AbstractList Each detection unit (20(i)) is configured to compare a voltage output from a battery cell (CL(i)) associated therewith with a predetermined criterion voltage. A plurality of detection units (20) operate sequentially in response to a start trigger (TRG) and also sequentially transmit a signal (OD) that reflects a result of comparing the voltages to detect whether a battery pack (10) has a low cell voltage fault. A fault monitoring device (30) detects an internal resistance fault when it receives from a transmission circuit (25) a determination signal (FV) indicating that the battery pack when electrically discharged has any of its battery cells (CLs) outputting a voltage decreased to be lower than the criterion voltage and if a current detected has a value (Ib) smaller in magnitude than a criterion current corresponding to a value of a current obtained by dividing a difference in voltage between an open circuit voltage of the battery cell and the criterion voltage by an upper limit value for internal resistance.
Author ISHISHITA TERUO
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Snippet Each detection unit (20(i)) is configured to compare a voltage output from a battery cell (CL(i)) associated therewith with a predetermined criterion voltage....
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SubjectTerms MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
TESTING
Title Abnormality detection device for assembled battery
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