BATTERY CHARGER WITH CELL FAILURE WARNING CIRCUIT

In a battery charger, a barging current is supplied to a rechargeable battery and a load current to a load circuit from a DC voltage source during a charging mode and the battery is allowed to supply a load current to the load circuit during a subsequent discharging mode. The battery voltage is comp...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	YOKOGAWA, TAKESHI
Format:	Patent
Sprache:	eng
Schlagworte:	CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION SYSTEMS FOR STORING ELECTRIC ENERGY
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Beschreibung
Zusammenfassung:	In a battery charger, a barging current is supplied to a rechargeable battery and a load current to a load circuit from a DC voltage source during a charging mode and the battery is allowed to supply a load current to the load circuit during a subsequent discharging mode. The battery voltage is compared with a reference voltage for detecting a low voltage condition, whereupon a counter is triggered and a warning signal is generated if the low voltage condition continues for an interval longer than a specified value. According to a second embodiment, the battery voltage is compared with low and high reference voltages and a first comparison signal is generated when it is lower than the former and a second comparison signal is generated when it is higher than the latter. The high reference voltage is set equal to a value which is lower than a voltage to which the battery can be charged during a normal condition, but higher than a maximum voltage to which it can be charged during an abnormal condition. A warning signal is generated if the first comparison signal is not followed by the second comparison signal.