Battery charging apparatus which determines a time to completion of charging
First Claim
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1. A battery charging apparatus comprising:
- a memory circuit to pre-store data characterizing a correlation between rechargeable battery charge capacity and time to completion of charging;
a charge capacity measuring circuit to measure a rechargeable battery charge capacity during charging; and
a calculating circuit to calculate, during charging, a time to completion of rechargeable battery charging based on the rechargeable battery charge capacity measured by said charge capacity measuring circuit and the correlation data stored in said memory circuit.
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Abstract
The battery charging apparatus is provided with a memory circuit for pre-storing correlation data between rechargeable battery charge capacity and time to completion of charging, a charge capacity measuring circuit to measure rechargeable battery charge capacity, and a calculating circuit to calculate, during charging, the time to completion of charging based on charge capacity determined by the charge capacity measuring circuit and correlation data stored in the memory circuit.
20 Citations
22 Claims
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1. A battery charging apparatus comprising:
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a memory circuit to pre-store data characterizing a correlation between rechargeable battery charge capacity and time to completion of charging; a charge capacity measuring circuit to measure a rechargeable battery charge capacity during charging; and a calculating circuit to calculate, during charging, a time to completion of rechargeable battery charging based on the rechargeable battery charge capacity measured by said charge capacity measuring circuit and the correlation data stored in said memory circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A battery charging apparatus comprising:
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a memory circuit to pre-store a plurality of data-sets characterizing a correlation between rechargeable battery charge capacity and time to completion of charging for each of a plurality of rechargeable battery temperatures; a charge capacity measuring circuit to measure a rechargeable battery charge capacity during charging; a temperature sensing circuit to measure a rechargeable battery temperature during charging; a calculating circuit to calculate, during charging, a time to completion of rechargeable battery charging based on the rechargeable battery charge capacity measured by said charge capacity measuring circuit, the battery temperature measured by said temperature sensing circuit, and the correlation data stored in said memory circuit. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A battery charging apparatus for charging rechargeable batteries with constant current and constant voltage comprising:
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a memory circuit to pre-store a plurality of data-sets characterizing a correlation between rechargeable battery charge capacity and time to completion of charging for each of a plurality of charging currents during constant current charging; a charge capacity measuring circuit to measure a rechargeable battery charge capacity during charging; a calculating circuit to calculate, during charging, a time to completion of rechargeable battery charging based on charging current during the constant current charging, the rechargeable battery charge capacity measured by said charge capacity measuring circuit, and the correlation data stored in said memory circuit. - View Dependent Claims (17, 18, 19, 20, 21, 22)
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Specification