Device and method for ascertaining the temperature in an electrical battery
First Claim
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1. A method for ascertaining the temperature in an electrical battery using a measuring circuit comprising:
- receiving at least one temperature value from a temperature sensor at a temperature measuring point outside the battery in the vicinity of the battery;
determining at least one electrical power value in dependence on a characteristic power variable associated with the operation of the battery;
using the measuring circuit to assign the power values and the temperature values with a weighting factor; and
using the measuring circuit to ascertain the temperature in the electrical battery from an energy balance equation in dependence on the at least one weighted temperature value and the weighted electrical power values.
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Abstract
A method for ascertaining the temperature in an electrical battery includes determining at least one temperature value at a temperature measuring point outside the battery in the vicinity of the battery; determining at least one electrical power value in dependence on a characteristic power variable associated with the operation of the battery; weighting the power values and the temperature values with an assigned weighting factor; and ascertaining the temperature in the electrical battery from an energy balance in dependence on the at least one weighted temperature value and the weighted electrical power values.
16 Citations
20 Claims
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1. A method for ascertaining the temperature in an electrical battery using a measuring circuit comprising:
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receiving at least one temperature value from a temperature sensor at a temperature measuring point outside the battery in the vicinity of the battery; determining at least one electrical power value in dependence on a characteristic power variable associated with the operation of the battery; using the measuring circuit to assign the power values and the temperature values with a weighting factor; and using the measuring circuit to ascertain the temperature in the electrical battery from an energy balance equation in dependence on the at least one weighted temperature value and the weighted electrical power values. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A device for ascertaining the temperature in an electrical battery comprising:
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at least one temperature sensor arranged outside a battery in the vicinity of the battery; a voltmeter for measuring battery terminal voltage; and a device for ascertaining battery terminal current and having an evaluation unit, which is connected to the at least one temperature sensor, the voltmeter, and the device for ascertaining the battery terminal current, and is designed for carrying out a method comprising the steps of; determining at least one temperature value at a temperature measuring point outside the battery in the vicinity of the battery; determining at least one electrical power value in dependence on a characteristic power variable associated with the operation of the battery; assigning the power values and the temperature values with a weighting factor; and determining the temperature in the electrical battery from an energy balance equation in dependence on the at least one weighted temperature value and the weighted electrical power values.
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Specification