Battery module and battery management system design and tests for electric racecar drive system

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Dr. Balázs Gergely György
Department of Electric Power Engineering

One may think of the phenomena of electrical driven vehicles as a revolutionary thing, however they are approximately the same age as internal combustion engines. Even in 1890, at the beginning of the motorized transport people could meet such vehicles in Europe and America. Nowadays many manufacturers and research institutes are dealing with the development of accumulator cells of Lithium-ion technology. The goal is still the same, as was with the early cell types. Developing safer, lighter, less polluting cells, which have higher capacitance, lower self-discharging index, and may be used in our cell phones, notebooks and electrically driven vehicles.

The thesis discusses the models of the car manufacturers, which are the forefront of the development of electric cars, we learn about the LiFePO4 cell type and the design, production and evaluation of a complete accumulator-module and its battery management system.

The main topic of the thesis is the accumulator-module made for the electrical racecar team bme-motion, which is a complete energy storage unit built-up from Lithium Iron Phosphate cells, and its battery management system. The rules and regulations of the Formula Student Electric, which is valid for electrically driven racecars, is discussing the requirements of this module. After introducing the main points regarding the accumulator-module, the production phases of the module are discussed. In the thesis the connection technology of the cells, the development steps of a complete demo-accumulator, and the production and testing of the battery management system are explained.


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