Battery charging apparatus
First Claim
1. A battery charging apparatus, comprising:
- sampling means for sampling a terminal voltage of a battery being charged at time intervals;
storing means for storing a maximum sampled value;
outputting means for outputting a full-charge signal when a new sampled value is smaller than the maximum sampled value by a predetermined value or more; and
updating means for updating the maximum sampled value of said storing means when a condition where said new sampled value is larger than said maximum sampled value continues for a predetermined time or more.
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Accused Products
Abstract
A battery charging apparatus includes a charger to which a battery to be charged is loaded and a charge controller which controls a charge in the charger. A terminal voltage of the battery loaded in the charger is sampled and A/D converted by a microcomputer of the charge controller at time intervals. At every timing when a new sampled value is stored in a memory, the new sampled value is compared with a maximum sampled value which has been stored in the memory before that time. When the new sampled value is smaller than the maximum sampled value by a predetermined value (ΔV), a full-charge signal is outputted. In addition, when a state where the new sampled value is larger than the maximum sampled value continues for a predetermined time period or more, the maximum sampled value is updated.
41 Citations
13 Claims
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1. A battery charging apparatus, comprising:
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sampling means for sampling a terminal voltage of a battery being charged at time intervals; storing means for storing a maximum sampled value; outputting means for outputting a full-charge signal when a new sampled value is smaller than the maximum sampled value by a predetermined value or more; and updating means for updating the maximum sampled value of said storing means when a condition where said new sampled value is larger than said maximum sampled value continues for a predetermined time or more. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A battery charging apparatus, comprising:
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sampling means for a sampling a terminal voltage of a battery being charged at time intervals; storing means for storing a maximum sampled value; comparing means for comparing a new sampler value with said maximum sampled value of said storing means; updating means for updating said maximum sampled value when said new sampled value is larger than said maximum sampled value; detecting means responsive to the sampled values of said sampling means for detecting that said terminal voltage continuously decreases for a predetermined time or more; and outputting means for outputting a full-charge signal in response to a detection of said detecting means when said new sampled value is smaller than said maximum sampled value by a predetermined value or more.
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8. A battery charging apparatus, comprising:
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sampling means for sampling a terminal voltage of a battery being charged at time intervals to obtain sampled values; storing means for storing a maximum sampled value; means for comparing a new sampled value with the maximum sampled value and outputting a full-charge signal when a new sampled value is smaller than the maximum sampled value by a predetermined value or more; and means for generating a predetermined time and updating the maximum sampled value of said storing means when a condition where said new sampled value is larger than said maximum sampled value continues for the predetermined time or more. - View Dependent Claims (9, 10, 11, 12, 13)
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Specification