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Keywords: Li-ion battery E-Cart charge balancing hybrid car
The automotive system engineering group of Infineon Technologies AG was assigned the task of developing an E-Cart. The drivable vehicle was to be used to demonstrate the electrical features of a hybrid car and was to be powered by a big Li-ion battery stack.The need for battery management with charge balancing was understood immediately. The simple conventional solution—dissipating power for charge equalisation—would need to be replaced by an active energy shift between the cells.
A fruitless search through the available literature—only basic principles have been published—forced the team to develop its own know-how.
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