ACTIVE BALANCING OF LITHIUM BATTERIES VIA REDISTRIBUTION OF EXCESS ENERGY ACROSS ALL CELLS

• Дата: 2025
• Автори: Yandulskiy , О., Tymokhin , О., Tymokhina , А., Hulyi , V.
• Формат: Стаття
• Мова: Ukrainian
• Опубліковано: Institute of Renewable Energy National Academy of Sciences of Ukraine 2025
• Теми: lithium battery; active balancing; BMS; energy storage systems; renewable energy sources; batteries.
• Онлайн доступ: https://ve.org.ua/index.php/journal/article/view/548
• Назва журналу: Vidnovluvana energetika

The article considers the issue of increasing the efficiency of lithium battery operation by implementing new methods of active cell balancing. Such batteries are the basis of modern energy storage systems, often used in combination with renewable energy sources (RES) to ensure balanced and reliable operation of power systems.  Modern battery cells usually consist of a large number of series or series-parallel connected cells, each of which has individual characteristics and different aging rates. This leads to uneven charge distribution, reduced efficiency and reduced battery life.  The paper proposes an improved approach to active balancing, which ensures effective redistribution of excess energy from recharged cells to other cells. Unlike common solutions, the proposed method provides global balance without the use of expensive or specialized components.  The architecture of a balancing device implemented on the basis of standard electronic elements is described, which reduces the cost and simplifies implementation. The advantage of this approach is the absence of the need for complex current management for each cell, which is especially important for industrial energy storage systems.  Simulations have shown that excess energy is distributed evenly, and its return to the source cell is minimized with increasing number of cells in the battery.  The proposed solution demonstrates high efficiency, scalability and suitability for use in backup power systems, renewable energy storage, electric transport and other areas where battery reliability and durability are important.