Scientific and technical competence center 1AK-GROUP: developments in the field of energy storage systems

The results of scientific and practical developments carried out by the Scientific and Technical Competence Center 1AK-GROUP, in cooperation with the Joint Institute of Mechanical Engineering of the National Academy of Sciences of Belarus and the Belarusian National Technical University, in 2024, have been published in specialized journals and collections of scientific papers. The works are devoted to the issues of energy and economic efficiency of the use of energy storage systems, as well as the development of a traction battery for the BelGee EX-50 electric vehicle.

The Scientific and Technical Competence Center (STC Center) 1AK-GROUP was created to develop advanced solutions in the field of chemical current sources and energy storage systems. The Center combines expert knowledge, modern laboratories and scientific developments of the holding’s employees, which allows for effective solution of problems of design, testing and implementation of innovative technologies. The STC Center 1AK-GROUP actively cooperates with leading scientific organizations of the country, including the United Institute of Mechanical Engineering of the National Academy of Sciences of Belarus, the Belarusian National Technical University, the Belarusian State Technological University, etc.

As part of joint research, methods for assessing the energy and economic efficiency of energy storage systems are developed and tested.

In the work [1], in particular, it is shown that depending on the tariffs applied at the enterprise, the features of the technical process and the need for emergency backup of electricity supply, the payback period of the energy storage system can be quite low — 3-5 years. A method for calculating the economic effect has been developed and the features of such a calculation have been analyzed.

The article [2] discusses a methodology for accelerated testing of lithium-ion NMC cells to assess their service life. The authors propose an approach based on an experimental study of cell degradation under one operating mode with subsequent extrapolation of the results to other temperature and current conditions. During the tests, changes in the internal resistance and capacity of the cells are analyzed. It is shown that internal resistance is not a reliable indicator of the cell condition, and a universal model is proposed for capacity degradation. A method for extrapolating the results to elevated temperatures is proposed. The developed degradation model can be integrated into battery management systems for monitoring the cell condition. The article [3] presents a methodology for temperature parameterization of the Roscher-Sauer model for calculating the state of charge (SOC) of lithium-ion batteries in electric vehicles. The authors propose an approach that takes into account the effect of temperature on the parameters of the battery equivalent circuit. The developed model allows for a more accurate determination of SOC under variable temperatures, which is important for the safe operation and durability of batteries. The results of the study can be used to improve battery management algorithms in electric vehicles.

The article [4] discusses the need to create a methodological framework for justifying the use of energy storage systems (ESS) in industry and energy. The authors consider the features of calculating the levelized cost of electricity storage (LCOS) and propose methods for assessing the economic effect of using ES in industrial enterprises. Examples are given of comparing the efficiency of various types of batteries and calculating the economic benefit of ES functions, such as reducing peak loads and ensuring uninterruptible power supply. The results of the study can be used to develop a regulatory framework and improve the efficiency of using ES in power systems.

The article [5] considers a methodology for calculating the cost of electricity storage in energy storage systems (ESS) operating in buffer mode. The features of calculating the levelized cost of electricity (LCOE) are indicated, and a modified LCOSbuf indicator for the buffer mode of ES operation is substantiated. An example of comparing the efficiency of lead-acid (AGM) and lithium-ion (LFP) batteries is given, showing the advantage of LFP cells in terms of economic and technical parameters. The results of the study can be used to calculate the efficiency of using energy storage systems in the energy and industrial sectors.

The main achievements of the 1AK-GROUP Scientific and Technical Competence Center in 2024:
1. Development of methods for calculating the economic efficiency of using energy storage systems, which allow estimating the payback period of such systems within 3-5 years, depending on tariffs and features of production processes.
2. Creation of models for accelerated testing of lithium-ion batteries, which allows predicting their service life and optimizing operation.
3. Temperature parameterization of models for accurate calculation of the state of charge (SOC) of batteries, which is critical for the safety and durability of batteries in electric vehicles.
4. Comparative analysis of the efficiency of various types of batteries, including lead-acid and lithium-ion, which helps to choose the best solutions for specific tasks.

The 1AK-GROUP Scientific and Technical Competence Center continues to develop, introducing new technologies and strengthening cooperation with scientific and educational institutions. This allows us to create innovative products and train highly qualified specialists who can accelerate the development of the Belarusian energy and industry.

Promising areas of work for the 1AK-GROUP Scientific and Technical Competence Center for 2025:
• Expanding research in the field of new materials for batteries.
• Developing intelligent battery management systems.
• Participating in international projects and conferences to exchange experience and technologies.
List of publications based on the results of developments in 2024, co-authored with the employees of the 1AK-GROUP Scientific and Technical Competence Center:

1. On the methodology for calculating the economic efficiency of using energy storage systems
K. V. Dobrego1), S. A. Fursov1), S. S. Dubnovitsky2), V. L. Chervinsky3)
In the Energy journal. News of Universities and Energy Associations of the CIS

2. Methodological aspects of testing lithium-ion nmc cells for cycling resource
K. V. Dobrego, Doctor of Physical and Mathematical Sciences, A. V. Belevich Deputy General Director for Highly Automated Electric Transport,
I. V. Ignatchik, A. A. Ananchikov,
In the journal Mechanics of Machines, Mechanisms and Materials.

3. Temperature parameterization of the Roscher-Sauer model for calculating SOC by an on-board computer of a car
K. V. Dobrego, Doctor of Physical and Mathematical Sciences, A. V. Belevich Deputy General Director for Highly Automated Electric Transport,
I. V. Ignatchik, A. A. Ananchikov,
PUBLICATION Actual issues of mechanical engineering 2024, issue 13

4. Creation of a methodological basis for substantiating the use of energy storage systems in industry and energy
Dobrego K. V., Chervinsky V. L., Head of the Department of Energy Saving BNTU
In the collection of reports of the III International scientific conf. «Sustainable Development of Energy in the Republic of Belarus: Status and Prospects» October 1-4, 2024

5. On the use of electrical energy storage systems in traction power supply of rail transport and rail-tube transport
A. A. Mashkov, K. V. Dobrego
In the collection of reports of the III International scientific conf. «Sustainable Development of Energy in the Republic of Belarus: Status and Prospects» October 1-4, 2024