Monitoring system and method
First Claim
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1. A method for monitoring one or more batteries, comprising:
- measuring a voltage of a first cell of a first battery using a first monitoring unit to generate a first measurement result, wherein measuring the voltage of the first cell of the first battery includes using a first reference voltage and simultaneously inputting the first reference voltage and a voltage generated in response to the voltage of the first cell into a first analog-to-digital (A/D) converter;
measuring the first reference voltage using a controller to generate a second measurement result, wherein measuring the first reference voltage includes using a precise external reference voltage and simultaneously inputting the external reference voltage and a voltage generated in response to the first reference voltage into a second A/D converter, the second A/D converter in the controller; and
using the first measurement result and the second measurement result to calculate a first correction factor suitable for use in correcting a set of measurements from at least one of the first and second monitoring units.
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Abstract
A method and system for monitoring a voltage of a battery cell or a battery stack. A first monitoring unit has a first plurality of battery monitoring nodes, first and second data ports, a first supply port switchably coupled to the first plurality of battery monitoring nodes, a second supply port switchably coupled to the first plurality of battery monitoring nodes, and a third supply port. A controller is connected to the first monitoring unit. Alternatively, a reference voltage may be connected to the controller or it may be connected to the first monitoring unit.
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Citations
20 Claims
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1. A method for monitoring one or more batteries, comprising:
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measuring a voltage of a first cell of a first battery using a first monitoring unit to generate a first measurement result, wherein measuring the voltage of the first cell of the first battery includes using a first reference voltage and simultaneously inputting the first reference voltage and a voltage generated in response to the voltage of the first cell into a first analog-to-digital (A/D) converter; measuring the first reference voltage using a controller to generate a second measurement result, wherein measuring the first reference voltage includes using a precise external reference voltage and simultaneously inputting the external reference voltage and a voltage generated in response to the first reference voltage into a second A/D converter, the second A/D converter in the controller; and using the first measurement result and the second measurement result to calculate a first correction factor suitable for use in correcting a set of measurements from at least one of the first and second monitoring units. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for monitoring one or more batteries, comprising:
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configuring at least one of a first monitoring unit and a second monitoring unit to measure a voltage across a first cell or a group of cells; providing a selectable input port to at least one of the first and second monitoring units, the selectable input port for coupling to a controller, the controller adjacent to at least one of the first and second monitoring units; measuring a voltage of the first cell of a first battery using the first monitoring unit to generate a first measurement result, wherein measuring the voltage of the first cell of the first battery includes using a first reference voltage and simultaneously inputting the first reference voltage and a voltage generated in response to the measured voltage of the first cell into a first analog-to-digital (A/D) converter; measuring the first reference voltage using the controller to generate a second measurement result, wherein measuring the first reference voltage includes using a precise external reference voltage and simultaneously inputting the external reference voltage and a voltage generated in response to the first reference voltage into a second A/D converter, the second A/D converter in the controller; and using the first measurement result and the second measurement result to calculate a first correction factor suitable for use in correcting a set of measurements from at least one of the first and second monitoring units. - View Dependent Claims (13, 14, 15)
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16. A method for monitoring one or more batteries, comprising:
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coupling a controller to at least one of a first monitoring unit and a second monitoring unit; coupling a first reference voltage of the first monitoring unit to a selectable port to measure a voltage of the first reference voltage; measuring a voltage of a first cell of a first battery using the first monitoring unit to generate a first measurement result, wherein measuring the voltage of the first cell of the first battery includes using the first reference voltage and simultaneously inputting the first reference voltage and a voltage generated in response to the measured voltage of the first cell into a first analog-to-digital (A/D) converter; measuring the first reference voltage using the second monitoring unit to generate a second measurement result, wherein measuring the first reference voltage includes using a precise external reference voltage, and simultaneously inputting the external reference voltage and a voltage generated in response to the measured first reference voltage into a second A/D converter in the second monitoring unit; and using the first measurement result and the second measurement result to calculate a first correction factor suitable for use in correcting a set of measurements from at least one of the first and second monitoring units. - View Dependent Claims (17, 18, 19, 20)
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Specification