Affiliation:
1. Belarusian National Technical University
2. A.V. Luikov Heat and Mass Transfer Institute of National Academy of Sciences of Belarus
Abstract
Due to the development of electric transport and the growth of “green” energy, electric energy storage systems (ESS) are increasingly being used in the world. The growth of the battery market in the last decade has been 20-30%. One of the ways to increase the efficiency of an electric power storage device is its hybridization, i.e. the use of heterogeneous battery units. The paper examines the features of passive coupling of lead-acid and lithium-ion batteries in a hybrid storage device. A model is presented for calculating the electrical characteristics of these units during operation. The possibility of choosing a hybrid drive structure that provides a comparable operating voltage range of the units (operation without voltage converters) is demonstrated. The modes of operation of a hybrid energy storage system are modeled both for simple parallel connection and for switching blocks according to a threshold algorithm. It is demonstrated that in order to equalize the discharge rate of the main and additional units, it is necessary to coordinate the capacity of the ESS, the degree of hybridization, the type of load and the electrical parameters of the batteries, which is impossible without modeling the system. When the threshold switching of the blocks takes place, additional control parameters, making it possible to change the discharge rate of the additional block and increase the economic efficiency of the hybrid ESS. Estimates of the economic efficiency of hybrid ESSs have been made for different values of the threshold switching voltage of the lithium-ion unit, as well as for three characteristic loads: an electric forklift truck, a 30-apartment apartment building and a 300-apartment residential complex. The results demonstrate the features and technical and economic potential of passive hybridization, can be used for the design of hybrid ESSs for small power systems with solar and wind power plants, in the calculation and design of generator – storage – consumer systems.
Publisher
Belarusian National Technical University
Reference12 articles.
1. 1H 2023 Energy Storage Market Outlook. Available at: https://about.bnef.com/blog/1h-2023-energy-storage-market-outlook (accessed 07 April 2023) (in Russian).
2. Dobrego K. V., Koznacheev I. A. (2023) Modelling of Functional Interaction of Hybrid Energy Storage System Battery Units. Energetika. Izvestiya Vysshikh Uchebnykh Zavedenii i Energeticheskikh Ob’edinenii SNG = Energetika. Proceedings of CIS Higher Education Institutions and Power Engineering Associations, 66 (5), 405–422. https://doi.org/10.21122/1029-7448-2023-66-5-405-422 (in Russian).
3. Dobrego K. V. (2023) On the Problem of Arrangement of Hybrid Energy Storage Systems. Energetika. Izvestiya Vysshikh Uchebnykh Zavedenii i Energeticheskikh Ob’edinenii SNG = Energetika. Proceedings of CIS Higher Education Institutions and Power Engineering Associations, 66 (3), 215–232. https://doi.org/10.21122/1029-7448-2023-66-3-215-232 (in Russian).
4. Ragone D. V. (1968) Review of Battery Systems for Electrically Powered Vehicles. SAE Technical Paper, 680453. https://doi.org/10.4271/680453.
5. Varkin I. N., Klementov A. D., Litvinenko S. V., Starodubtsev N. F., Stepanov A. B. Application of Ultracapacitors as Traction Energy Sources. Proceedings of the 7th International Seminar on Double Layer Capacitors and Similar Energy Storage Devices 1997 Dec 8. Florida Educational Seminars, Boca Raton, 742–749.