DEVICE AND METHOD FOR CURRENT FLOW CONTROL FOR DUAL BATTERY VEHICLE ARCHITECTURE

• Main Authors: GRILLS, Reginald C, TOFILESCU, Pompilian
• Format: Patent
• Language: English; French; German
• Published: 06.09.2023
• Subjects: BASIC ELECTRONIC CIRCUITRY; BLASTING; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; COMBUSTION ENGINES; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; PULSE TECHNIQUE; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDEDFOR; STARTING OF COMBUSTION ENGINES; SYSTEMS FOR STORING ELECTRIC ENERGY; TRANSPORTING; VEHICLES IN GENERAL; VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISEPROVIDED FOR; WEAPONS

Described herein is a device and method for current flow control for dual battery vehicle architecture. The dual battery vehicle architecture includes a second energy source that is used to support electrical loads, such as radio and navigation systems, during re-cranking in stop-start situations. A quasi-diode device is configured to effectively split a main battery and starter circuit from the rest of the vehicle electrical system including the second energy source. The quasi-diode device includes a plurality of field effect transistors (FET) that conducts current in both directions between the main battery and starter circuit and the rest of the vehicle electrical system when the FETs are turned on and conducts current only from the main battery and starter circuit to the rest of the vehicle electrical system when the FETs are turned off, i.e. when re-cranking is occurring during a start-stop situation.