DETECTION AND PREVENTION OF SHORT FORMATION IN BATTERY CELLS
First Claim
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1. A method, comprising:
- monitoring a voltage of at least a battery cell;
recording a length of time the cell voltage is below a voltage threshold;
detecting when the length of time exceeds a time threshold; and
disabling charging of the battery cell when the length of time has exceeded the time threshold.
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Abstract
Failure mechanisms of a battery cell may be detected and prevented by monitoring a voltage of the battery cell, and detecting when the cell voltage falls below a voltage threshold. The length of time that the voltage remains below the voltage threshold may be monitored to detect when the length of time exceeds a time threshold. When the length of time has exceeded the time threshold, the battery pack may be disabled from further charging.
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Citations
18 Claims
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1. A method, comprising:
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monitoring a voltage of at least a battery cell; recording a length of time the cell voltage is below a voltage threshold; detecting when the length of time exceeds a time threshold; and disabling charging of the battery cell when the length of time has exceeded the time threshold. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A computer program product, comprising:
a non-transitory computer readable medium comprising code to perform the steps comprising; monitoring a voltage of at least a battery cell; recording a length of time the cell voltage is below a voltage threshold; detecting when the length of time exceeds a time threshold; and disabling charging of the battery cell when the length of time has exceeded the time threshold. - View Dependent Claims (8, 9, 10, 11, 12, 18)
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13. An apparatus, comprising:
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a battery pack coupled to a first terminal, wherein the battery pack comprises at least one battery cell and at least one charge switch coupled to the at least one battery cell; and a control module coupled to each of the at least one battery cells and each of the at least one charge switches, wherein the control module is configured to perform the steps comprising; monitoring a voltage of the at least a battery cell; recording a length of time the cell voltage is below a voltage threshold; detecting when the length of time exceeds a time threshold; and disabling charging of the at least battery cell when the length of time has exceeded the time threshold. - View Dependent Claims (14, 15, 16, 17)
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Specification