Simulation results demonstrate the effectiveness of the proposed approach in balancing the energy stored in parallel-connected battery cells in which the state of charge (SoC) estimation error is found to be only 1.15%. References is not available for this document. Need Help?
Traditionally, boost converters (BC) are required to operate as an intermediate interface to drive high power loads through available low voltage (LV) sources such as a fuel cell (FC), photovoltaic or battery based energy system.
Abstract: While several recent studies have focused on eliminating the imbalance of energy stored in series-connected battery cells, very little attention has been given to balancing the energy stored in parallel-connected battery cells. As such, this paper aims at presenting a new balancing approach for parallel LiFePO 4 battery cells.
Cells in a battery pack are grouped in series and parallel to provide high voltage and high capacity as needed. Due to capacity fading, a cell may readily attain maximum charge capacity when charging, causing a risk.
In contrast to series-connected cells, parallel-connected cells experience current variations due to differences in internal resistance, leading to disparities in discharge performance and aging (Gallardo-Lozano et al., 2015). The impedance of a battery decreases as it matures over time (Wei et al., 2018, Song et al., 2017).
The research delved into the characteristics of active and passive cell balancing processes, providing a comprehensive analysis of different cell balancing methodologies and their effectiveness in optimizing battery efficiency.