An Optimized Topology for Next-to-Next Balancing of Series-Connected Lithium-ion Cells

Voltage balancing between series-connected cells of rechargeable lithium-ion batteries is important for battery life, autonomy, and safety. Active balancing is the designated choice for applications that are sensitive to energy losses and maximized autonomy. First, a well-known next-to-next balancin...

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Bibliographic Details
Published in:IEEE transactions on power electronics 2014-09, Vol.29 (9), p.4603-4613
Main Authors: Thanh Hai Phung, Collet, Alexandre, Crebier, Jean-Christophe
Format: Article
Language:English
Subjects:
Active balancing
Applied sciences
Autonomy
Balancing
Batteries
CMOS integrated circuits
Coils
Convertors
Design. Technologies. Operation analysis. Testing
Direct energy conversion and energy accumulation
Disturbances. Regulation. Protection
Electric currents
Electric power
Electrical engineering. Electrical power engineering
Electrical machines
Electrical power engineering
Electrochemical conversion: primary and secondary batteries, fuel cells
Electronics
Engineering Sciences
Evolution
Exact sciences and technology
Filtering
Inductors
Integrated circuits
Ions
Lithium batteries
lithium-ion
next-to-next balancing
power integrated circuits
Power networks and lines
Product safety
Rechargeable batteries
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Topology
Transistors
Voltage
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Description
Summary:Voltage balancing between series-connected cells of rechargeable lithium-ion batteries is important for battery life, autonomy, and safety. Active balancing is the designated choice for applications that are sensitive to energy losses and maximized autonomy. First, a well-known next-to-next balancing technique is presented and its design and operating limitations are analyzed. Then, the paper focuses on an evolution of the converter's architecture offering better performances while being more compact, requiring fewer and smaller filtering needs and still, being simple to implement. The experimental results of the balancing operation of a pack of eight cells connected in series show demonstrative and satisfactory results.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2013.2284797