Method for verifying smart battery failures by measuring input charging voltage and associated systems
First Claim
1. A method for verifying failures in a battery for an information handling system, comprising:
- monitoring a battery for a charging current, the battery including a discharge transistor (D-FET) coupled between an input for the battery and a cell pack for the battery;
when a positive charging current into the battery above a desired current threshold level is detected when the battery is not in charge mode and when the information handling system is configured to receive power from the battery and not from another power source, the method further comprising;
tuning off the D-FET, if it is on;
measuring an input terminal voltage level for the battery; and
utilizing the input terminal Voltage level measurement to facilitate a determination of whether or not the detected positive charging current into the battery represents a positive battery failure indication or a false battery failure indication.
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Abstract
A method and associated system are disclosed for verifying charging failures for smart batteries by measuring input charging voltage and associated systems. In one embodiment, a determination is made whether or not a charging current is indicative of a battery failure by utilizing an analog-to-digital (A/D) port to measure the input charging voltage. As long as the measured input charging voltage is below the cell pack voltage or some set voltage value, whichever is higher, the BMU considers a charging current detection to be a false failure indication. If the measured charging voltage is above the cell pack voltage and the set voltage value, the BMU considers the charging current detection to be a positive failure indication. The BMU can then disable the battery or implement other verification steps before disabling the battery, as desired.
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Citations
18 Claims
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1. A method for verifying failures in a battery for an information handling system, comprising:
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monitoring a battery for a charging current, the battery including a discharge transistor (D-FET) coupled between an input for the battery and a cell pack for the battery; when a positive charging current into the battery above a desired current threshold level is detected when the battery is not in charge mode and when the information handling system is configured to receive power from the battery and not from another power source, the method further comprising; tuning off the D-FET, if it is on; measuring an input terminal voltage level for the battery; and utilizing the input terminal Voltage level measurement to facilitate a determination of whether or not the detected positive charging current into the battery represents a positive battery failure indication or a false battery failure indication. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification