Modelling of Multi Inductor based Balancing of Battery Pack for Electrical Mobility

Abstract

The pre requisite for success of electrical mobility is driven by development of battery technologies. Reliable performance of electrical mobility necessitates for high energy density battery packs. The advent of Li ion cell chemistry revolutionised the electric and hybrid vehicle advancement due to its high energy density, lighter weight and wide range of temperature performance. Higher operating voltages of the battery are achieved by configuration of the cells in series and parallel combinations. The performance of these battery packs are affected by operating temperature and imperfections in manufacturability which causes mismatches in cell impedance, cell potential and state of charge (SOC) imbalance. These performance issues are overcome by cell and battery balancing techniques. In this paper, a dynamic battery pack balancing circuit by using multi inductor with SOC based logic controller for both cell and battery balancing are presented. The battery pack balancing performances during static, charging, discharging conditions are analysed.

A review: Energy storage system and balancing circuits for electric vehicle application

“…When the imbalance occurred in the cell string then the control circuit executes the balancing system and energy transfer through of capacitor, inductor, or converter. This balancing topologies are single capacitor [80,81], double-tiered switched capacitor [19,82], single inductor [19,83], multi inductor [40,84], single winding transformer [40,85], single resonant converter [64,86] based balancing circuit that shown in Figure 7. All of the circuits are bidirectional and work on charging and discharging mode.…”

“…Besides, this balancing circuit has been strong scalability, but it required a large number of switches, balancing components. C2C balancing topology can be divided into two groups: Adjacent cell balancing and direct cell‐to‐cell balancing [19, 40, 72–86].…”

Efficient Battery Cell Balancing Methods for Low-Voltage Applications: A Review

“…Second, considering the circuit topology, balancing circuits can be classified into six types: cell bypass, cell-to-cell, cell-to pack, pack-to-cell, cell-to-pack-to-cell and proactive designs [25]- [27]. Several sophisticated active balancing methods, based on capacitive [19], [28]- [31] or inductive [32]- [35] charge transfer mechanisms can be found. Furthermore, in [35], [36] and [37] different transformer or converter based balancing topologies are shown, respectively.…”

“…Several sophisticated active balancing methods, based on capacitive [19], [28]- [31] or inductive [32]- [35] charge transfer mechanisms can be found. Furthermore, in [35], [36] and [37] different transformer or converter based balancing topologies are shown, respectively. Various review papers have studied LIB balancing techniques in general [23], [33], [38]- [42].…”