BATTERY PACK ANOMALY DETECTING METHOD AND BATTERY PACK
First Claim
1. An anomaly detecting method for a battery pack including a secondary battery made up of at least one cell and a voltage detecting circuit for measuring cell voltage of said secondary battery, said battery pack anomaly detecting method comprising the steps of:
- measuring said cell voltage; and
judging by using said measured cell voltage whether predefined anomaly judgment conditions to be used in determining that at least one of an internal short circuit of said cell and an anomaly of said voltage detecting circuit has occurred are satisfied, and determining that at least one of the internal short circuit of said cell and the anomaly of said voltage detecting circuit has occurred if the anomaly judgment conditions are judged to have been satisfied.
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Accused Products
Abstract
An anomaly detecting method for a battery pack including a secondary battery made up of at least one cell and a voltage detecting circuit for measuring cell voltage of the secondary battery comprises the steps of measuring the cell voltage, judging by using the measured cell voltage whether predefined anomaly judgment conditions to be used in determining that at least one of an internal short circuit of the cell and an anomaly of the voltage detecting circuit has occurred are satisfied, and determining that at least one of the internal short circuit of the cell and the anomaly of the voltage detecting circuit has occurred if the anomaly judgment conditions are judged to have been satisfied. The anomaly detecting method prevents in advance continued execution of charge operation when the cell voltage does not reach a threshold voltage due to an internal short circuit of the cell or an anomaly of the voltage detecting circuit.
36 Citations
14 Claims
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1. An anomaly detecting method for a battery pack including a secondary battery made up of at least one cell and a voltage detecting circuit for measuring cell voltage of said secondary battery, said battery pack anomaly detecting method comprising the steps of:
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measuring said cell voltage; and judging by using said measured cell voltage whether predefined anomaly judgment conditions to be used in determining that at least one of an internal short circuit of said cell and an anomaly of said voltage detecting circuit has occurred are satisfied, and determining that at least one of the internal short circuit of said cell and the anomaly of said voltage detecting circuit has occurred if the anomaly judgment conditions are judged to have been satisfied. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A battery pack comprising:
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a secondary battery made up of at least one cell; a voltage detecting circuit for measuring cell voltage of said secondary battery; and a charge controller for controlling a charge current supplied to said secondary battery in accordance with the result of detection by said voltage detecting circuit; wherein said charge controller judges by using the cell voltage measured by said voltage detecting circuit whether predefined anomaly judgment conditions to be used in determining that at least one of an internal short circuit of said cell and an anomaly of said voltage detecting circuit has occurred are satisfied and then determines that at least one of the internal short circuit of said cell and the anomaly of said voltage detecting circuit has occurred if the anomaly judgment conditions are judged to have been satisfied. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification