BATTERY CHARGER WITH CELL FAILURE WARNING CIRCUIT

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...

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1. Verfasser: YOKOGAWA, TAKESHI
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Sprache:eng
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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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creator YOKOGAWA, TAKESHI
description 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.
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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.</description><edition>5</edition><language>eng</language><subject>CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER ; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ; ELECTRICITY ; GENERATION ; SYSTEMS FOR STORING ELECTRIC ENERGY</subject><creationdate>1992</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&amp;date=19921209&amp;DB=EPODOC&amp;CC=EP&amp;NR=0488426A3$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25564,76547</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&amp;date=19921209&amp;DB=EPODOC&amp;CC=EP&amp;NR=0488426A3$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>YOKOGAWA, TAKESHI</creatorcontrib><title>BATTERY CHARGER WITH CELL FAILURE WARNING CIRCUIT</title><description>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. 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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.</abstract><edition>5</edition><oa>free_for_read</oa></addata></record>
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subjects CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRICITY
GENERATION
SYSTEMS FOR STORING ELECTRIC ENERGY
title BATTERY CHARGER WITH CELL FAILURE WARNING CIRCUIT
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