![]() The dc/dc converter then converts dc-link voltage to a regulated output voltage for battery charging. The rectified voltage is fed to a regulated intermediate dc-link bus. ![]() The input voltage is first filtered out and fed to the PFC integrated ac/dc converter. A simplified universal two-stage battery charger for BEVs/PHEVs is shown in Fig. Conversely, multistage conversion configuration (ac-dc and dc-dc) inherently offers low-voltage ripple and relatively high power rating and hence is suitably adopted for lithium-ion and Ni-MH batteries, which are being used in PHEVs. Single-stage conversion (ac/dc) configuration suffers with large low-frequency ripple in the output current, and hence, its application is limited to lead-acid batteries only. The battery charger should be designed according to IEEE-1547, SAE-J2894, and similar standards such that the amount of harmonic and dc current injected into the utility grid must be controlled within the preset limit.Ī variety of PEC configurations and control methods have been developed as BEVs/PHEVs battery chargers, which includes single-stage and multistage power conversion. A BEV/PHEV charger must ensure the operation at unity power factor or close to unity power factor to draw maximum amount of real power from utility grid with less distortion in current to minimize the power quality impact on grid. Its operation depends on power electronics component, switching strategies, and control algorithms. ![]() A battery charger composed of several PECs should be reliable and efficient with high power delivery capacity at low cost and weight. In order to improve convenience and increase charging efficiency, a number of charging schemes have been proposed as house charging, solar charging station, park and charge (PAC), move and charge (MAC), and regenerative charging as shown in Fig. The challenge of transforming BEVs/PHEVs from concept to reality is to make it safe, convenient, and affordable for consumers to charge batteries. ![]() ![]() PEC configuration for battery chargers plays a critical role in the sustainable development of BEVs/PHEVs. ![]()
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