A method for calculating the charge to balance for cells in a multi-cell battery. The method determines a depletion-goal state of charge (SOC) for the battery cells. The method determines a corresponding set of depletion-goal charges and usable charges for the set of cells, where the depletion-goal charge is calculated using the corresponding charge capacity and depletion-goal SOC and the usable charge is calculated using the corresponding actual charge and depletion-goal charge. The method determines a charge-bias using the set of usable charges. The method determines for the set of cells a corresponding set of charges to balance from the set of usable charges and the charge-bias.
Method for performing cell balancing of a battery system based on cell capacity values
2016-06-28
Patent
Electronic Resource
English
IPC: | H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / G06F ELECTRIC DIGITAL DATA PROCESSING , Elektrische digitale Datenverarbeitung / 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 |