| 摘要 |
A system for the monitoring of the state of a battery used in a vehicle and to which electrical elements comprising at least one electrical consumer and/or at least one electrical generator are connected comprises means for the detection of the battery voltage, means for the extraction of voltage frequency components from the detected battery voltage at different frequencies, means for the detection of the current flowing out of or into the battery, means for the extraction of current frequency components from the detected battery current at the same frequencies at which the voltage frequency components were extracted, means for the determination of internal impedances of the battery from the voltage frequency components and current frequency components extracted at a respective frequency, means for the storage of predetermined relationships between the internal impedance and the battery state for each of the respective frequencies and means for the determination of the battery state from the determined internal impedances and the predetermined relationships. In this connection, means are provided for the monitoring of the state of at least some of the electrical elements as well as means in order to select the time for a respective voltage and current detection in dependence on the detected state of the electrical elements and/or to fix the conditions for a respective voltage and current detection.
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