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 programed to measure, as index values pertaining to a deterioration state of the battery unit, time elapsed from when the battery unit was manufactured, and said determination unit programed to determine whether the battery unit has reached its end of life by using the measured index values;
a suspension unit programed to suspend use of the battery unit when the battery unit has been determined to have reached its end of life; and
a temperature detection unit programed to detect a temperature of the battery unit,wherein the determination unit is programed to correct the measured elapsed time based on the temperature and is programed to determine whether the battery unit has reached its end life by using corrected that is the corrected 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.
16 Citations
9 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 programed to measure, as index values pertaining to a deterioration state of the battery unit, time elapsed from when the battery unit was manufactured, and said determination unit programed to determine whether the battery unit has reached its end of life by using the measured index values; a suspension unit programed to suspend use of the battery unit when the battery unit has been determined to have reached its end of life; and a temperature detection unit programed to detect a temperature of the battery unit, wherein the determination unit is programed to correct the measured elapsed time based on the temperature and is programed to determine whether the battery unit has reached its end life by using corrected that is the corrected elapsed time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 9)
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8. A method for controlling a battery pack including a battery unit that includes secondary battery cells,
the method comprising the steps of: -
measuring, as index values pertaining to a deterioration state of the battery unit, time elapsed from when the battery unit was manufactured; detecting a tem erasure of the battery unit; correcting the measured elapsed time based on the temperature; determining whether the battery unit has reached its end of life by using corrected time that is corrected elapsed time; and suspending use of the battery unit when the battery unit has been determined to have reached its end of life.
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Specification