System and Method for Verifying a Reference Voltage for Battery Cell Monitoring
First Claim
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1. A system for assessing an analog to digital converter reference voltage for monitoring a battery cell voltage, comprising:
- a reference voltage;
a first analog to digital converter, the first analog to digital converter in electrical communication with the reference voltage, the first analog to digital converter configured to sample a voltage of at least one battery cell; and
a controller, the controller in electrical communication with the first analog to digital converter, the controller including a second analog to digital converter and an internal band-gap voltage, the internal band-gap voltage responsive to the reference voltage, the controller including instructions for monitoring the internal band-gap voltage to verify the reference voltage is a desired voltage.
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Abstract
Systems and methods for verifying a reference voltage within a battery pack are disclosed. In one example, an assessment of a reference voltage is made via a band-gap voltage of a microcontroller. The system and method may be particularly useful determining whether or not the reference voltage has drifted from a desired voltage.
5 Citations
20 Claims
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1. A system for assessing an analog to digital converter reference voltage for monitoring a battery cell voltage, comprising:
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a reference voltage; a first analog to digital converter, the first analog to digital converter in electrical communication with the reference voltage, the first analog to digital converter configured to sample a voltage of at least one battery cell; and a controller, the controller in electrical communication with the first analog to digital converter, the controller including a second analog to digital converter and an internal band-gap voltage, the internal band-gap voltage responsive to the reference voltage, the controller including instructions for monitoring the internal band-gap voltage to verify the reference voltage is a desired voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system for assessing an analog to digital converter reference voltage for monitoring a battery cell voltage, comprising:
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a reference voltage; a first analog to digital converter, the first analog to digital converter in electrical communication with the reference voltage, the first analog to digital converter configured to sample a voltage of at least one battery cell, the first analog to digital converter configured to determine a voltage of the at least one battery cell referenced with respect to the reference voltage; and a controller, the controller in electrical communication with the first analog to digital converter, the controller including a second analog to digital converter and an internal band-gap voltage, the internal band-gap voltage responsive to the reference voltage, the second analog to digital converter configured to determine a reference voltaged with respect to the reference voltage, the controller including instructions for monitoring the internal band-gap voltage via the second analog to digital converter to verify the reference voltage is a desired voltage. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method for verifying a reference voltage for battery cell voltage monitoring, comprising:
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referencing a first analog to digital converter to a reference voltage; providing a band-gap voltage from the reference voltage; and indicating degradation of the reference voltage when the band-gap reference voltage varies from a predetermined voltage range. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification