High Power Density Battery Charger for Plug-In Micro EV

Shinichiro Hattori, Haruhi Eto, Fujio Kurokawa

Abstract


Household distributed power systems that the renewable energy such as the PV and the wind power are introduced as energy sources are expected to spread in the future as efforts for global decarbonization. EV has already been recognized the role as a battery for the energy management of the household distributed power system.

The Micro EV which is a kind of EV requires frequent charging from a household AC outlet due to its small capacity, so it is necessary to suppress the harmonics of the AC power source and charge the battery at an appropriate power factor. For this reason, the charger of micro EV generally has two stages of a converter which performs input control with a PFC (power factor correction) function and a converter which performs charge control. However, the reduction in size and the weight is an important factor for the traveling performance of EVs, and the miniaturization and the weight reduction are also required for the onboard charger. Therefore, in this paper, a method to control the input current and charge control to the battery with a single converter is proposed. By using the proposed single-stage converter, it is possible to dramatically improve the energy density and the power conversion efficiency. Moreover, it is confirmed that the proposed circuit can cope with dc input from the dc bus, and is also an effective application in the dc bus based household distributed power system which is expected to spread in the future.

Keywords


renewable energy; electrical vehicles

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References


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DOI (PDF): https://doi.org/10.20508/ijrer.v8i2.7864.g7387

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