Accurate battery temperature measurement by compensating self heating

A method for accurately measuring a battery temperature using a temperature sensor embodied in a battery monitoring integrated circuit is disclosed. The method includes performing calibration to estimate a thermal resistance between the battery monitoring integrated circuit and a terminal of a batte...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	Boezen, Hendrik, van Lammeren, Joop Petrus Maria, Büthker, Henricus Cornelis Johannes, van Dongen, Marijn Nicolaas
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES MEASURING QUANTITY OF HEAT MEASURING TEMPERATURE PHYSICS PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY SYSTEMS FOR STORING ELECTRIC ENERGY TESTING THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
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Beschreibung
Zusammenfassung:	A method for accurately measuring a battery temperature using a temperature sensor embodied in a battery monitoring integrated circuit is disclosed. The method includes performing calibration to estimate a thermal resistance between the battery monitoring integrated circuit and a terminal of a battery, measuring a temperature using the temperature sensor, measuring a voltage at the terminal or at a supply pin of the battery monitoring integrated circuit while a current is being used to charge or discharge the battery, calculating a power by multiplying the voltage and the current, and calculating a self-heating temperature adjustment to the temperature by multiplying the power and the thermal resistance.