A hybrid electric vehicle having battery packs coupled to the vehicle in parallel, which each include series-connected cells, a single contactor, a battery pack controller that detects cell voltages, and at least one controller coupled to a bus contactor and the packs. Responsive to a vehicle key on signal, the at least one controller closes the single battery pack contactor for at least one of the battery packs that includes voltage balanced cells. The bus contactor is then closed to deliver electrical power to the vehicle, and may include a precharge contactor that is closed in advance of and until the bus contactor open circuit voltage is reduced to a contactor voltage difference. The battery pack controllers are further configured to detect voltage, current, and temperature of each cell, to open the single contactor, and to adjust the state of charge of unbalanced cells until balanced relative with the others.
VEHICLES WITH MODULAR PARALLEL HIGH VOLTAGE BATTERIES
2019-06-13
Patent
Elektronische Ressource
Englisch
IPC: | B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion / H01M Verfahren oder Mittel, z.B. Batterien, für die direkte Umwandlung von chemischer in elektrische Energie , PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY |
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