Method for monitoring the state of a battery in a motor vehicle

The disclosure relates to a method for monitoring the state of a battery. In the process, the internal temperature of the battery during a charging process is determined in defined intervals at different time points, and an evaluation unit continuously determines a temperature gradient at least from...

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Bibliographische Detailangaben
Hauptverfasser:	Karden, Eckhard, Eifert, Mark
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES ELECTRICITY ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL GENERATION MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES PERFORMING OPERATIONS PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY SYSTEMS FOR STORING ELECTRIC ENERGY TRANSPORTING VEHICLES IN GENERAL
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Beschreibung
Zusammenfassung:	The disclosure relates to a method for monitoring the state of a battery. In the process, the internal temperature of the battery during a charging process is determined in defined intervals at different time points, and an evaluation unit continuously determines a temperature gradient at least from the temperature values. At least one limit value for the temperature gradient is stored in the evaluation unit, and the evaluation unit generates a signal when the temperature gradient which is determined by the evaluation unit reaches this limit value. When this signal from the evaluation unit is present, the charging voltage of the battery is driven such that there is no battery current, while the internal temperature of the battery is further periodically detected, and the evaluation unit generates an alarm signal when the temperature has fallen after suppression of the battery current.