LOW-VOLTAGE BATTERY CHARGING SYSTEM AND METHOD

This application relates to the technical field of electric vehicles, and in particular, to a low-voltage battery charging system and method. The charging system includes: a low-voltage battery capable of supplying power to a low-voltage electrical device of a vehicle; a power battery module; a dire...

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Bibliographische Detailangaben
Hauptverfasser:	SUN, Jian, YANG, Lulu, WANG, Hui, SONG, Tianzhu
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	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 SYSTEMS FOR STORING ELECTRIC ENERGY TRANSPORTING VEHICLES IN GENERAL
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Beschreibung
Zusammenfassung:	This application relates to the technical field of electric vehicles, and in particular, to a low-voltage battery charging system and method. The charging system includes: a low-voltage battery capable of supplying power to a low-voltage electrical device of a vehicle; a power battery module; a direct current-to-direct current converter capable of receiving a voltage supplied by the power battery module when a positive relay and a negative relay of the power battery module are closed, and converting the voltage into a charging voltage of the low-voltage battery, so as to charge the low-voltage battery; and a DC-DC controller electrically connected to the low-voltage battery and capable of monitoring the voltage of the low-voltage battery when the vehicle is in a dormant state, where the DC-DC controller is communicatively connected to a battery management system of the vehicle, to wake up the battery management system when the voltage of the low-voltage battery is lower than a first threshold, such that the battery management system closes the positive relay and the negative relay of the power battery module.