SYSTEMS AND METHODS FOR DETECTING LEAKAGE PATHS IN A BATTERY SENSING CIRCUIT
First Claim
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1. A method for detecting a leakage path in a battery sensing circuit, the method comprising:
- measuring a first change in voltage over time of a first cell in a battery stack;
measuring a second change in voltage over time of a second cell in the battery stack;
determining that the first change in voltage and the second change in voltage are different;
measuring a first voltage of the first cellmeasuring a second voltage of the second cell;
determining that the first voltage and the second voltage are different by at least a first threshold amount; and
implementing a protective action in response to determining that the first voltage and the second voltage are different by at least the first threshold amount.
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Abstract
System and methods for detecting electrical leakages in a battery sensing are presented. In certain embodiments, the systems and methods allow a vehicle battery sensing circuit and/or other associated system to detect certain electrical leakages and implement one or more actions to protect vehicle systems from damage resulting from such leakages.
24 Citations
20 Claims
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1. A method for detecting a leakage path in a battery sensing circuit, the method comprising:
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measuring a first change in voltage over time of a first cell in a battery stack; measuring a second change in voltage over time of a second cell in the battery stack; determining that the first change in voltage and the second change in voltage are different; measuring a first voltage of the first cell measuring a second voltage of the second cell; determining that the first voltage and the second voltage are different by at least a first threshold amount; and implementing a protective action in response to determining that the first voltage and the second voltage are different by at least the first threshold amount. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system comprising:
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a first battery cell; a battery sensing circuit coupled to the first battery cell by a first sense line, a first resistor, and a first fuse disposed in series and a second sense line, a second resistor, and a second fuse disposed in series, wherein the battery sensing circuit is configured to; measure a first change in voltage over time of the first battery cell; measure a second change in voltage over time of a second battery cell disposed adjacent to the first battery cell in a battery stack; determine that the first change in voltage and the second change in voltage are different; measure a first voltage of the first battery cell; measure a second voltage of the second battery cell; determine that the first voltage and the second voltage are different by at least a first threshold amount; and implement a protective action in response to determining that the first voltage and the second voltage are different by at least the first threshold amount. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification