POWER SUPPLY SYSTEM, POWER SUPPLY MODULE USED IN THE SAME, AND PORTABLE EQUIPMENT HAVING THE SYSTEM AND MODULE

PROBLEM TO BE SOLVED: To provide a power supply system which responds to an instantaneous high energy requirement, and suppresses early deterioration of a lithium ion capacitor while achieving maximum use of power capacity. SOLUTION: The power supply system 10 includes a lithium ion secondary batter...

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Bibliographische Detailangaben
1. Verfasser:	TSUBATA TOSHIO
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS CAPACITORS CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES ORLIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY SYSTEMS FOR STORING ELECTRIC ENERGY
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a power supply system which responds to an instantaneous high energy requirement, and suppresses early deterioration of a lithium ion capacitor while achieving maximum use of power capacity. SOLUTION: The power supply system 10 includes a lithium ion secondary battery 3, a monitoring circuit 6 which monitors terminal voltage of the battery 3, a lithium ion capacitor 4 connected in parallel to the battery 3, an FET 9 which opens and closes to connect and disconnect the capacitor 4, and a protective circuit 5 which monitors the terminal voltage of the capacitor 4. The protective circuit 5 opens and closes the FET 9 to control the full charge voltage of the capacitor 4 to be equal to or lower than an upper-limit voltage determined to be lower than the maximum operating voltage of the lithium ion secondary battery 3. COPYRIGHT: (C)2011,JPO&INPIT