Battery charging apparatus
AssigneeSanyo Electric Co., Ltd.
InventorKazuhiro Tsujino
Life of this patent
Estimating the term…
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 (.DELTA.V), 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.
Claims13
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.
A battery charging apparatus, comprising:
- 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.
A battery charging apparatus, comprising:
- 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.
Dependencies are inferred from the claim text.