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Fast battery equalization with isolated bidirectional DC-DC converter for PHEV applications

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2 Author(s)
Ziling Nie ; Dept. of Electr. & Comput. Eng., Univ. of Michigan-Dearborn, Dearborn, MI, USA ; Mi, C.

Battery systems in plug-in hybrid electric vehicles (PHEV) suffer from voltage imbalance. This imbalance reduces the available capacity of certain charge/discharge cycles and shortens the battery life cycle. A new topology and smart balancing strategy for PHEV battery systems are proposed in this paper, which uses a bidirectional DC-DC converter to reduce balancing time and the number of switches needed. The simulation on a ten series connected battery cell is compared to a traditional switched capacitor equalizer.

Published in:

Vehicle Power and Propulsion Conference, 2009. VPPC '09. IEEE

Date of Conference:

7-10 Sept. 2009