CHARGER AND METHOD FOR DETECTING COMPLETION OF CHARGING

CHARGER AND METHOD FOR DETECTING COMPLETION OF CHARGING

PURPOSE:To prevent shortening of the service life of a battery by measuring the inner resistance of the battery at a predetermine period and ending the charging operation at a moment when an inner resistance for ending the charging operation is detected. CONSTITUTION:A charge control circuit section...

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1. Verfasser: MIIDOKORO NOBUO
Format: Patent
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 MIIDOKORO NOBUO
description PURPOSE:To prevent shortening of the service life of a battery by measuring the inner resistance of the battery at a predetermine period and ending the charging operation at a moment when an inner resistance for ending the charging operation is detected. CONSTITUTION:A charge control circuit section 7 measures the open voltage of a battery 2 through an A/D converter 4 and turns the contact of a common terminal in a relay switch 5 to the terminal (d) side thus measuring the load connection voltage, i.e., the voltage when a load 6 is connected with the battery 2, through a relay switch 3 and the A/D converter 4. The charge control circuit section 7 then calculates the inner resistance of the battery 2 based on the open voltage and the load connection voltage thus measured. When the calculated inner resistance represents a charge end resistance, the residual charging amount is presented on a display section 8 and then the charging is ended and switched to trickle charging. This method prevents overcharge and thereby prevents shortening of the service life of battery 2.
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CONSTITUTION:A charge control circuit section 7 measures the open voltage of a battery 2 through an A/D converter 4 and turns the contact of a common terminal in a relay switch 5 to the terminal (d) side thus measuring the load connection voltage, i.e., the voltage when a load 6 is connected with the battery 2, through a relay switch 3 and the A/D converter 4. The charge control circuit section 7 then calculates the inner resistance of the battery 2 based on the open voltage and the load connection voltage thus measured. When the calculated inner resistance represents a charge end resistance, the residual charging amount is presented on a display section 8 and then the charging is ended and switched to trickle charging. 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CONSTITUTION:A charge control circuit section 7 measures the open voltage of a battery 2 through an A/D converter 4 and turns the contact of a common terminal in a relay switch 5 to the terminal (d) side thus measuring the load connection voltage, i.e., the voltage when a load 6 is connected with the battery 2, through a relay switch 3 and the A/D converter 4. The charge control circuit section 7 then calculates the inner resistance of the battery 2 based on the open voltage and the load connection voltage thus measured. When the calculated inner resistance represents a charge end resistance, the residual charging amount is presented on a display section 8 and then the charging is ended and switched to trickle charging. This method prevents overcharge and thereby prevents shortening of the service life of battery 2.</abstract><edition>6</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 CHARGER AND METHOD FOR DETECTING COMPLETION OF CHARGING
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