Battery charger capable of charging a variety of batteries with varying cell numbers
First Claim
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1. A battery charger comprising:
- a battery voltage detector for detecting a voltage of a battery being charged and outputting a first battery voltage signal indicative of the voltage of the battery;
a battery voltage converter for converting the first battery voltage signal to a second battery voltage that changes within a predetermined range corresponding to a variable range of the voltage of the battery being charged, the second battery voltage being in a form of an analog signal;
an analog-to-digital converter for converting the second battery voltage to a digital value; and
a full charge detector for detecting, based on the digital value, that the battery has reached a fully charged condition.
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Abstract
A battery charger having a battery charger converter, which converter consists of a battery voltage detector for detecting the voltage of a secondary battery and a differential amplifier disposed between the battery voltage detector and an A/D converter. This battery charger is capable of reliably detecting when any battery has become fully charged, including inactive batteries such as batteries that are still warm from recently being discharged and batteries that have been inactive for a long period of time.
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7 Claims
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1. A battery charger comprising:
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a battery voltage detector for detecting a voltage of a battery being charged and outputting a first battery voltage signal indicative of the voltage of the battery; a battery voltage converter for converting the first battery voltage signal to a second battery voltage that changes within a predetermined range corresponding to a variable range of the voltage of the battery being charged, the second battery voltage being in a form of an analog signal; an analog-to-digital converter for converting the second battery voltage to a digital value; and a full charge detector for detecting, based on the digital value, that the battery has reached a fully charged condition. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification