BATTERY PACK, ELECTRICAL DEVICE, AND CONTROL METHOD THEREFOR
First Claim
1. A battery pack comprising:
- a battery unit that includes secondary battery cells;
a determination unit that measures, as index values pertaining to a deterioration state of the battery unit, at least two or more from among;
a capacity reduction rate that is a reduction rate of a full-charge capacity of the battery unit from an initial value;
a cycle count representing the number of times that a cycle, in which the battery unit is charged until a cumulative value of charge quantities charged to the battery unit reaches a prescribed charge quantity, has been performed;
the number of times that the battery unit has been charged;
time elapsed from manufacturing of the battery unit; and
cell voltages that are voltages of the secondary battery cells; and
determines whether the battery unit has reached its end of life by using the measured index values; and
a suspension unit that suspends use of the battery unit when the battery unit has reached its end of life,wherein the determination unit measures, as the index values, at least the cycle count and the elapsed time.
3 Assignments
0 Petitions
Accused Products
Abstract
Provided is a battery pack capable of more reliably preventing adverse effects from being externally exerted. MCU (26) measures, as index values pertaining to the deterioration state of battery unit (1), at least two or more from among: a capacity reduction rate that is the reduction rate of the full-charge capacity of battery unit (1) from an initial value; a cycle count representing the number of times that a cycle, in which battery unit (1) is charged until the cumulative value of charge quantities charged to battery unit (1) reaches a prescribed charge quantity, has been performed; the number of times that battery unit (1) has been charged; time elapsed from the manufacturing of battery unit (1); cell voltages that are the voltages of secondary battery cells 11; and determines whether battery unit (1) has reached its end of life by using the measured index values. Monitoring IC 25 suspends the use of battery unit (1) when battery unit (1) has reached its end of life.
12 Citations
10 Claims
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1. A battery pack comprising:
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a battery unit that includes secondary battery cells; a determination unit that measures, as index values pertaining to a deterioration state of the battery unit, at least two or more from among;
a capacity reduction rate that is a reduction rate of a full-charge capacity of the battery unit from an initial value;
a cycle count representing the number of times that a cycle, in which the battery unit is charged until a cumulative value of charge quantities charged to the battery unit reaches a prescribed charge quantity, has been performed;
the number of times that the battery unit has been charged;
time elapsed from manufacturing of the battery unit; and
cell voltages that are voltages of the secondary battery cells; and
determines whether the battery unit has reached its end of life by using the measured index values; anda suspension unit that suspends use of the battery unit when the battery unit has reached its end of life, wherein the determination unit measures, as the index values, at least the cycle count and the elapsed time. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9)
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2. (canceled)
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10. A method for controlling a battery pack including a battery unit that includes secondary battery cells,
the method comprising the steps of: -
measuring step that measures, as index values pertaining to a deterioration state of the battery unit, at least two or more from among;
a capacity reduction rate that is a reduction rate of a full-charge capacity of the battery unit from an initial value;
a cycle count representing the number of times that a cycle, in which the battery unit is charged until a cumulative value of charge quantities charged to the battery unit reaches a prescribed charge quantity, has been performed;
the number of times that the battery unit has been charged;
time elapsed from manufacturing of the battery unit; and
a cell voltage that is a voltage between both electrodes of the secondary battery cell;determining step that determines whether the battery unit has reached its end of life by using the measured index values; and suspending step that suspends use of the battery unit when the battery unit has reached its end of life, wherein said measuring step measures, as the index values, at least the cycle count and the elapsed time.
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Specification