Lithium-ion battery diagnostic and prognostic techniques

Details Lithium-ion battery diagnostic and prognostic techniques Lithium-ion battery diagnostic and prognostic techniques

2006-10-24

2009-11-03

Tso, Edward (Department: 2858)

Electricity: battery or capacitor charging or discharging

Battery or cell charging

With detection of current or voltage amplitude

C320S126000

Reexamination Certificate

active

07612540

ABSTRACT:
Embodiments provide a method and a system for determining cell imbalance condition of a multi-cell battery including a plurality of cell strings. To determine a cell imbalance condition, a charge current is applied to the battery and is monitored during charging. The charging time for each cell string is determined based on the monitor of the charge current. A charge time difference of any two cell strings in the battery is used to determine the cell imbalance condition by comparing with a predetermined acceptable charge time difference for the cell strings.

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European Search Report dated Feb. 21, 2008.

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