Lithium-ion battery diagnostic and prognostic techniques

Exemplary embodiments provide a method and a system for determining cell imbalance condition of a multi-cell battery (190) including a plurality of cell strings (180a-b). To determine a cell imbalance condition, a charge current is applied to the battery (190) and is monitored during charging. The c...

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Bibliographische Detailangaben
1. Verfasser:	SINGH HARMOHAN N
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BASIC ELECTRIC ELEMENTS CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY SYSTEMS FOR STORING ELECTRIC ENERGY
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Beschreibung
Zusammenfassung:	Exemplary embodiments provide a method and a system for determining cell imbalance condition of a multi-cell battery (190) including a plurality of cell strings (180a-b). To determine a cell imbalance condition, a charge current is applied to the battery (190) and is monitored during charging. The charging time for each cell string (180) is determined based on monitoring of the charge current. A charge time difference (T) of any two cell strings (180a-b) in the battery (190) is used to determine the cell imbalance condition by comparing with a predetermined acceptable charge time difference (T acpt ) for the cell strings (180a-b).