The work gives a detailed description of lithium-ion batteries and methods of their use in technical devices of various purposes. The basic technical characteristics of the main types of industrial lithium batteries are presented and it is shown that lithium-iron-phosphate, lithium-titanate and lithium-carbon-titanate batteries are currently used in autonomous electric vehicles. The work also analyzed the results of bench tests of lithium-titanate and lithium-carbon-titanate batteries in terms of their temperature state at different values of external temperature and different levels of charge-discharge currents. The results of the tests showed the limit values of the battery heating temperature, as well as a change in the charging process at sub-zero ambient temperatures, which requires the necessary measures - cooling or heating - when assembling the traction battery from the tested elements. Bibl. 8, figure, table 12.
A prototype of a wireless charger of inductive type with serial resonance in the circuits of the transmitting and receiving coils has been developed and manufactured, and experimental studies of the efficiency of power transmission from an external source to a storage battery have been carried out. It is shown that the efficiency of the created sample takes values in the range 39% - 78 % and depends on the operating frequency and the distance between the coils. It is also shown that when using coils with an outer diameter of 500 mm, the positioning of these coils in the process of charging the battery at a distance of up to 10 cm does not lead to a significant decrease in efficiency. The experimental values of the efficiency are compared with the calculated ones obtained on a simplified model that takes into account only resistive losses in the coils, and it is shown that the experimental values of the efficiency are 15-20 % less than the calculated ones. References. 8, figures. 5, table 1.
Розглянуто питання енергетичної ефективності тягових акумуляторних батарей електромобілів під час їх експлуатації в міжміському ци клі руху для оцінки економічності застосування електротранспортних засобів і визначення оптимальної відстані між станціями «швидкої зарядки» тягових акумуляторних батарей, що встановлюються на міжміських дорогах загального користування. Бібл. 12, рис. 3, таблиця. Kлючові слова: електромобіль, тягова акумуляторна батарея, енергоємність, енергоефективність.
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