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In lithium-ion battery system for hybrid electric vehicle, charge equalizer is essential to enhance the battery life cycle and safety. However, for a large number of battery cells, a conventional equalizer has the difficulty of individual cell balancing and the implementation size problem as well as the cost. Moreover, it shows high voltage stress of electrical elements in the equalization converter...
This paper proposes a modularized charge equalizer using intelligent voltage sensing scheme. In proposed circuit, a central equalization converter is shared by every battery cells through the cell selection switch, instead of a dedicated charge equalizer for each cell. Each cell voltage can be sequentially obtained by operating the cell selection switches. These switches are effectively used for a...
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