CHARGER AND CHARGING METHOD

PROBLEM TO BE SOLVED: To solve the problem that it takes time for a battery discharged to some extent to increase the charging on-period voltage to a certain voltage level or above since the open voltage when the battery is connected to a charger is low and a completely discharged battery is charged...

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Bibliographische Detailangaben
Hauptverfasser:	NAGASHIMA TATEAKI, MAEKAWA NOBUAKI, YANAGISAKO MANABU, SUMITOMO SHOGO, HASHIMOTO ZENICHI
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS GENERATION MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES PHYSICS PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION SYSTEMS FOR STORING ELECTRIC ENERGY TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TESTING
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To solve the problem that it takes time for a battery discharged to some extent to increase the charging on-period voltage to a certain voltage level or above since the open voltage when the battery is connected to a charger is low and a completely discharged battery is charged with the possibility of liquid spill since the charging on-period voltage does not increase to such a value. SOLUTION: The charger calculates the internal impedance of a battery based on a voltage difference of the battery between the battery voltage during a charging current on-period and the battery voltage during a charging current-off period and a charging current to determine a primary battery such as a dry cell or a battery which has been degraded by cycle or a battery which has become inactive after a long-time unused period or for other reasons. Based on a relationship with the open voltage of the battery, if the battery is judged an inactive battery after a long-time unused period or for other reasons, it is continuously charged to reduce the degradation by cycle. COPYRIGHT: (C)2010,JPO&INPIT