Charging system for traction batteries of the electric car «OKA-E»

The research area is electric drives for agricultural vehicles. Often, small farms use transport that is not commensurate with needs, as a rule, for personal movement, transportation of small cargoes, heavy equipment or products, the same vehicle is used, purchased on the principle of transportation of the possible heaviest cargo, even if it is is extremely rare. It is proposed to use an electric vehicle powered by rechargeable batteries for personal movement and transportation of small loads. The article describes the battery charging system, which was developed and implemented on the basis of an experimental model of the Oka-E electric vehicle. This system is exclusive, since the proposed voltage level of storage batteries does not correspond to well-known foreign and domestic counterparts and is combined with the installed electronic-conversion equipment available on the Russian market. A kinematic diagram for an electric vehicle for agricultural purposes was developed and calculated, according to which the gasoline engine was dismantled and a standard asynchronous electric motor was installed, connected to the clutch unit and the original gearbox. A new control system for the frequency-converting device has been developed and manufactured, while maintaining the controls familiar to the driver. An algorithm for charging traction batteries has been determined, an electrical circuit of a charger for batteries of an electric vehicle has been developed. Their capacity was calculated in accordance with the technical parameters of the electric vehicle. Comparison of rechargeable batteries and their selection is made. Experimental research on charging a storage battery with the developed charger has been carried out, sea trials have been carried out. The main advantages of the proposed electric vehicle are low operating costs associated with cheap maintenance of the mechanical part, a high degree of reliability of the power unit and electronic conversion devices, low cost of electricity, which can be obtained from its own solar power plant or centralized power supply using the night tariff. The main consumers can be farmers, livestock specialists, agronomists, postmen and other employees.

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