University of Twente Student Theses


A Comprehensive Study on System Level Active Balancing Methods for Lithium Iron Phosphate Batteries

Rijkeboer, Maaike F. (2024) A Comprehensive Study on System Level Active Balancing Methods for Lithium Iron Phosphate Batteries.

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Abstract:This research has been executed to present the advantages of active battery balancing. The research focuses on active balancing on system level rather than on cell level. The study focusses on the balancing process of Lithium Iron Phosphate batteries. Evaluating different active balancing methods showed that the buck-boost converter based topology gives the best result for system level balancing. The topology is chosen because it scores good on modularity, economically feasibility, its ease of integration and its capability to balance regardless of voltage levels. Active balancing in general showed system improvements in the field of gained efficiency, less heat production, decreasing of weight and faster balancing times. It also showed that balancing with this topology on system level has financial benefits over balancing on cell level and is also more efficient. The study shows that the balancing time can be reduced down to 75% compared to passive balancing. The total system efficiency is increased, less heat is produced during the balancing process and weight can be saved on the battery system. To implement the balancer only one additional cable for each battery is required, combined with a few additional components which can be implemented on the existing battery management system.
Item Type:Essay (Master)
Super B, Hengelo, The Netherlands
Faculty:EEMCS: Electrical Engineering, Mathematics and Computer Science
Subject:53 electrotechnology
Programme:Electrical Engineering MSc (60353)
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