Performance comparison of active balancing techniques for lithium-ion batteries
By Federico Baronti, R. Roncella, R. Saletti. 2014
171 citations recorded by the source corpus.
Abstract A simple but effective analysis to calculate the performances achievable by a balancing circuit for series-connected lithium-ion batteries ( i.e., the time required to equalise the battery and the energy lost during this process) is described in this paper. Starting from the simple passive technique, in which extra energy is dissipated on a shunt resistor, active techniques, aiming at an efficient energy transfer between battery cells, are investigated. The basic idea is to consider the balancing circuit as a DC/DC converter capable of transferring energy between its input and output with a certain efficiency and speed. As the input and output of the converter can be either a single cell or the entire battery pack, four main active topologies are identified: cell to cell, cell to pack, pack to cell and cell to/from pack ( i.e. , the combination of the cell to pack and pack to cell topologies when the converter is bidirectional). The different topologies are compared by means of statistical simulations. They clearly show that the cell to cell topology is the quickest and most efficient one. Moreover, the pack to cell topology is the least effective one and surprisingly dissipates more energy than the passive technique, if the converter efficiency is below 50%.
Subfields: Automotive Engineering, Electrical and Electronic Engineering
View Paper: https://www.semanticscholar.org/paper/871d955620c254d09a5f1443b16df4f918f4e2fb
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In Automotive Engineering
In Electrical and Electronic Engineering
Citations in the corpus
- A MultiWinding Transformer Cell-to-Cell Active Equalization Method for Lithium-Ion Batteries With Reduced Number of Driving Circuits (2016, background): “Therefore, the equalization circuits are required for a series-connected battery string to prevent these problems and increase the lifetime of the battery string [5], [6].”