A battery cell balancing method with linear mode bypass current control

A study of a novel control method for a battery cell equaliser, based on the shunting transistor method is presented. The method allows cell balancing in both battery operating modes, recharging and driving modes. To verify the applicability of the method, computer simulation was conducted analysing how the system balances during a driving period, by following a real current profile measured from a real REVAi driving. The obtained results show how at the end of the driving period the system is already balanced, allowing a subsequent high speed charge and avoiding a later equalisation stage. Finally, the integration of the balancing system into a higher level system, based on a multiport converter topology is discussed.

[1]  P.T. Krein,et al.  Electrical properties and equalization of lithium-ion cells in automotive applications , 2005, 2005 IEEE Vehicle Power and Propulsion Conference.

[2]  Alfred Rufer,et al.  Power interfaces and storage selection for an ultrafast EV charging station , 2012 .

[3]  Enrique Romero-Cadaval,et al.  Battery equalization active methods , 2014 .

[4]  A. Emadi,et al.  Battery balancing methods: A comprehensive review , 2008, 2008 IEEE Vehicle Power and Propulsion Conference.

[5]  Wei Zhu,et al.  Modularized battery management for large lithium ion cells , 2011 .

[6]  J. L. Duarte,et al.  Multiport Converter for Fast Charging of Electrical Vehicle Battery , 2011, IEEE Transactions on Industry Applications.

[7]  T. Gottwald,et al.  Equalization of EV and HEV batteries with a ramp converter , 1997, IEEE Transactions on Aerospace and Electronic Systems.

[8]  Joeri Van Mierlo,et al.  Passive and active battery balancing comparison based on MATLAB simulation , 2011, 2011 IEEE Vehicle Power and Propulsion Conference.

[9]  Masatoshi Uno,et al.  Single-Switch Multioutput Charger Using Voltage Multiplier for Series-Connected Lithium-Ion Battery/Supercapacitor Equalization , 2013, IEEE Transactions on Industrial Electronics.

[10]  Enrique Romero-Cadaval,et al.  Digest of "Active Battery Balancing for Electric Vehicles Battery Pack" , 2013 .

[11]  Donald W. Novotny,et al.  Design considerations for charge equalization of an electric vehicle battery system , 1995, Proceedings of 1995 IEEE Applied Power Electronics Conference and Exposition - APEC'95.

[12]  Masatoshi Uno,et al.  Influence of High-Frequency Charge–Discharge Cycling Induced by Cell Voltage Equalizers on the Life Performance of Lithium-Ion Cells , 2011, IEEE Transactions on Vehicular Technology.

[13]  J. McDowall,et al.  Lithium ion: the next generation of long life batteries characteristics, life predictions, and integration into telecommunication systems , 2000, INTELEC. Twenty-Second International Telecommunications Energy Conference (Cat. No.00CH37131).

[14]  Cheng Shukang,et al.  Comparison and Evaluation of Charge Equalization Technique for Series Connected Batteries , 2006 .

[15]  T. Jalakas,et al.  Electric vehicle fast charger high voltage input multiport converter topology analysis , 2013, 2013 International Conference-Workshop Compatibility And Power Electronics.