BATTERY INTERNAL SHORT-CIRCUIT DETECTION APPARATUS AND METHOD, AND BATTERY PACK
First Claim
1. A battery internal short-circuit detection apparatus, comprising:
- a voltage detection unit for detecting a terminal voltage of the battery;
a current detection unit for detecting a discharging current of the battery;
a voltage drop and recovery detection unit for detecting a momentary voltage drop of the battery and a recovery from the voltage drop, in response to a result of detection performed by the voltage detection unit; and
a determination unit for determining that an internal short circuit has occurred, when a maximum value of the discharging current detected by the current detection unit between the voltage drop and the recovery is equal to or lower than a threshold current.
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Abstract
A battery internal short-circuit detection apparatus includes: a voltage detection unit for detecting a terminal voltage of the battery; a current detection unit for detecting a discharging current of the battery; a voltage drop and recovery detection unit for detecting a momentary voltage drop of the battery and a recovery from the voltage drop, in response to a result of detection performed by the voltage detection unit; and a determination unit for determining that an internal short circuit has occurred, when a maximum value of the discharging current detected by the current detection unit between the voltage drop and the recovery is equal to or lower than a threshold current.
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Citations
13 Claims
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1. A battery internal short-circuit detection apparatus, comprising:
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a voltage detection unit for detecting a terminal voltage of the battery; a current detection unit for detecting a discharging current of the battery; a voltage drop and recovery detection unit for detecting a momentary voltage drop of the battery and a recovery from the voltage drop, in response to a result of detection performed by the voltage detection unit; and a determination unit for determining that an internal short circuit has occurred, when a maximum value of the discharging current detected by the current detection unit between the voltage drop and the recovery is equal to or lower than a threshold current. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A battery pack, comprising:
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a battery; and an internal short-circuit detection apparatus, which has voltage detection means for detecting a voltage of the battery, current detection means for detecting a discharging current, voltage drop and recovery detection means for detecting a momentary voltage drop of the battery and a recovery from the voltage drop, in response to a result of detection performed by the voltage detection means, and determination means for determining that an internal short circuit has occurred, when a maximum value of the discharging current detected by the current detection means between the voltage drop and the recovery is equal to a threshold current.
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8. A battery internal short-circuit detection method, comprising:
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a detection step of detecting a momentary voltage drop of the battery and a recovery from the voltage drop; and a determination step of determining that an internal short circuit has occurred, when a maximum value of a discharging current between the voltage drop and the recovery is equal to or lower than a threshold current. - View Dependent Claims (9, 10, 11, 12, 13)
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Specification