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Conventional electric vehicle (EV) battery chargers suffer from severe power quality (PQ) issues at AC mains, due to non‐linear nature of a diode‐bridge rectifier, used for AC–DC conversion. Here, a power factor correction (PFC) circuit based on an isolated discontinuous conduction mode (DCM) zeta converter topology is designed and implemented for charging a 100 Ah, 48 V lead–acid EV battery. Test results, for charging an EV battery with constant current‐constant voltage mode (CC‐CV) control, are shown with a 1 kW zeta converter prototype. Test results show that the proposed zeta converter conforms to the improved PQ standard such as the IEC 61000–3–2, as well as, a unity power factor (UPF) input current with low harmonic distortion factor is achieved. Moreover, a smooth battery current is obtained during charging, even when there are fluctuations in the supply voltage hence enhanced lifetime of the battery is achieved.
Kushwaha et al. (2019) studied this question.
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