ELECTRICAL DEVICE SYSTEM AND BATTERY PACK
First Claim
1. An electrical device system provided with a battery pack having a rechargeable battery, an electrical device of which a power source is the battery pack, and a charging device that charges the battery pack, the system comprising:
- a current detecting unit that detects a battery current flowing through the battery during a charge to or a discharge from the battery;
a battery state detecting unit that detects at least one of a battery voltage and a temperature of a heat generating unit that generates heat when the battery current flows,a determining unit that estimates an amount of change in at least one of the battery voltage detected by the battery state detecting unit and the temperature of the heat generating unit based on the battery current detected by the current detecting unit during a charge to or a discharge from the battery, and calculates an actual amount of change in at least one of the battery voltage detected by the battery state detecting unit and the temperature of the heat generating unit, wherein the determining unit determines that the current detecting unit is abnormal when a difference between the calculated actual amount of change and the estimated amount of change is a default value or more.
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Abstract
An electrical device system having a battery pack, an electrical device, and a charging device, includes: a current detecting unit that detects a battery current flowing through the battery during a charge to or a discharge from the battery; a battery state detecting unit that detects at least one of a battery voltage and a temperature of a heat generating unit; and a determining unit that estimates an amount of change in at least one of the battery voltage and the temperature of the heat generating unit, based on the battery current, and calculates an amount of actual change in at least one of the battery voltage and the temperature of the heat generating unit, wherein the determining unit determines that the current detecting unit is abnormal, when the difference between the calculated amount of actual change and the estimated amount of change is a default value or more.
33 Citations
6 Claims
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1. An electrical device system provided with a battery pack having a rechargeable battery, an electrical device of which a power source is the battery pack, and a charging device that charges the battery pack, the system comprising:
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a current detecting unit that detects a battery current flowing through the battery during a charge to or a discharge from the battery; a battery state detecting unit that detects at least one of a battery voltage and a temperature of a heat generating unit that generates heat when the battery current flows, a determining unit that estimates an amount of change in at least one of the battery voltage detected by the battery state detecting unit and the temperature of the heat generating unit based on the battery current detected by the current detecting unit during a charge to or a discharge from the battery, and calculates an actual amount of change in at least one of the battery voltage detected by the battery state detecting unit and the temperature of the heat generating unit, wherein the determining unit determines that the current detecting unit is abnormal when a difference between the calculated actual amount of change and the estimated amount of change is a default value or more. - View Dependent Claims (2, 3, 4, 5)
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6. A battery pack having a rechargeable battery, the battery pack comprising:
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a current detecting unit that detects a battery current flowing through the battery; a battery state detecting unit that detects at least one of a battery voltage and a temperature of the battery; and a determining unit that estimates an amount of change in at least one of the battery voltage and the temperature detected by the battery state detecting unit, based on the battery current detected by the current detecting unit, and calculates an actual amount of change in at least one of the battery voltage and the temperature detected by the battery state detecting unit, wherein the determining unit determines that the current detecting unit is abnormal when a difference between the calculated actual amount of change and the estimated amount of change is a default value or more.
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Specification