BATTERY VOLTAGE DETECTION CIRCUIT

PROBLEM TO BE SOLVED: To provide a battery voltage detection circuit using a multiplexer system, in which an influence of detection voltage differences due to parasitic capacitance is reduced and detection voltage accuracy is improved.SOLUTION: The battery voltage detection circuit for monitoring th...

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Bibliographische Detailangaben
1. Verfasser:	SANO KAZUAKI
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES PHYSICS PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY SYSTEMS FOR STORING ELECTRIC ENERGY TESTING
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a battery voltage detection circuit using a multiplexer system, in which an influence of detection voltage differences due to parasitic capacitance is reduced and detection voltage accuracy is improved.SOLUTION: The battery voltage detection circuit for monitoring the voltages of a plurality of series-connected batteries comprises: a flying capacitor; a multiplexer switch sequentially connecting the flying capacitor to the plurality of batteries; voltage detection means detecting a voltage of the flying capacitor; first reference potential connection means connected to one terminal of the flying capacitor; second reference potential connection means connected to the other terminal of the flying capacitor; and a control circuit controlling the multiplexer switch, the first reference potential connection means and the second reference potential connection means.