Active Battery Balancing for Battery Packs
نویسندگان
چکیده
منابع مشابه
Active Balancing Method for Battery Cell Equalization
The emerging need for more power has led to the development of series-parallel connected battery cells. Having a more complex system also brought with it new challenges. One of these is the problem of cell imbalance. Balancing algorithms are based on extracting or adding charge in order to have balanced cells. Their goal is to protect the battery from damage and to help prolong the battery’s li...
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Li-ion batteries are promoting the development of more and more performing electric vehicles (EVs) and hybrid EVs (HEVs). Thanks to their high energy density and increased current capabilities which permit to use a relative light and space saving battery packthese batteries are replacing almost all older battery chemistries in vehicle applications. Despite the advantages these cells provide, be...
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Battery packs containing multiple cells in series require a balancing system in order to ensure energy and power requirements for the battery pack are maintained throughout its life. Based on the equivalent circuit model (ECM) of a cell, a new framework is proposed which can accommodate a controloriented model of a balancing system while maintaining the same measured input and output as an ECM....
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Battery management systems (BMS) in hybrid-electric-vehicle (HEV) battery packs must estimate values descriptive of the pack’s present operating condition. These include: battery state of charge, power fade, capacity fade, and instantaneous available power. The estimation mechanism must adapt to changing cell characteristics as cells age and therefore provide accurate estimates over the lifetim...
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This paper describes advances in models and methods used to estimate hybrid-electric-vehicle (HEV) battery-pack state-of-charge (SOC) using extended Kalman filtering (EKF). The electrochemical cells in the battery pack are Lithium Ion Polymer based, have a nominal capacity of about 7.5 Ah, and are optimized for power-needy applications. The discharge curve of these cells is very flat, which is ...
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ژورنال
عنوان ژورنال: Electrical, Control and Communication Engineering
سال: 2013
ISSN: 2255-9159,2255-9140
DOI: 10.2478/ecce-2013-0006