Method for detecting a fault state of a battery cell, detection device, and motor vehicle
AssigneeAudi AG
InventorsSebastian Koch, Christian Roettinger, Markus Goebel
Life of this patent
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Abstract
A method for detecting a fault state of at least one battery cell of a battery having multiple battery cells. A cell voltage of a respective battery cell of the multiple battery cells is registered at a measurement time and a comparison value is determined as a function of at least one of the cell voltages and is compared to a provided first reference value. The fault state is detected as a function of a result of the comparison. A scatter value is determined, which represents a scatter of at least part of the cell voltages registered at the specific measurement time, and the fault state is determined as a function of the scatter value.
Claims10
A method for detecting a fault state of at least one of a plurality of battery cells of a battery, the method comprising:
- registering, by a detection device and for each of the plurality of battery cells, a cell voltage of a respective battery cell at a specific measurement timepoint,
- determining, for each of the plurality of battery cells, a comparison value of the cell voltage relative to a first reference value, and
- determining a scatter value, the scatter value representing a scatter of at least part of the plurality of cell voltages,
- wherein the fault state is identified based on the plurality of comparison values and/or based on the scatter value.
A detection device for detecting a fault state of at least one of a plurality of battery cells of a battery, wherein the detection device is configured to:
- register, for each of the plurality of battery cells, a cell voltage of a respective battery cell at a specific measurement timepoint,
- determine, for each of the plurality of battery cells, a comparison value of the cell voltage relative to a first reference value, and
- determine a scatter value, the scatter value representing a scatter of at least part of the plurality of cell voltages,
- wherein the fault state is identified based on the plurality of comparison values and/or based on the scatter value.
Dependencies are inferred from the claim text.