METHOD OF DIAGNOSING DETERIORATION OF CELL OF BATTERY FOR VEHICLE
First Claim
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1. A method of diagnosing deterioration of a cell of a battery for a vehicle, the method comprising:
- measuring current and voltage of the cells and estimating internal resistance of the cells using the method of least squares based on the measured current and voltage;
using a stored data table to calculate available capacity and available output based on the estimated internal resistancediagnosing cell deterioration based on the calculated available capacity and available output.
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Abstract
Provided is a method of diagnosing deterioration of a cell of a battery for a vehicle. The present method makes it possible to prevent deterioration of a battery pack and reduction of performance due to degradation. The methods include calculating internal resistance in the method of least squares based on current and voltage of each cell in a battery pack, calculating available capacity and power of the cells from the internal resistance, determining whether the cells are deteriorated on the basis of the available capacity and power, and instructing a driver to check and repair the battery pack if needed.
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5 Claims
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1. A method of diagnosing deterioration of a cell of a battery for a vehicle, the method comprising:
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measuring current and voltage of the cells and estimating internal resistance of the cells using the method of least squares based on the measured current and voltage; using a stored data table to calculate available capacity and available output based on the estimated internal resistance diagnosing cell deterioration based on the calculated available capacity and available output. - View Dependent Claims (2, 3)
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4. A method of diagnosing deterioration of a cell of a battery for a vehicle, the method comprising:
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measuring the current and voltage of the cells and estimating internal resistance of the cells by using the method of least squares based on the measured current and voltage; calculating an average of the internal resistance of all of the cells; and determining whether the estimated internal resistance of the cells is abnormally larger than the average of the internal resistance of all the cells; wherein cells having an estimated internal resistance abnormally larger than the average of the internal resistance of all the cells are diagnosed as deteriorated. - View Dependent Claims (5)
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Specification