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Development and Validation of an Energy Management System for an Electric Vehicle with a split Battery Storage System
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 Title & Authors
Development and Validation of an Energy Management System for an Electric Vehicle with a split Battery Storage System
Becker, Jan; Schaeper, Christoph; Rothgang, Susanne; Sauer, Dirk Uwe;
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Within the project `e performance` supported by the German Ministry of Education and Research (BMBF) an electric vehicle, powered by two lithium-ion battery packs of different capacity and voltage has been developed. The required Energy Management System (EMS) in this system controls the current flows of both packs independently by means of two individual dc-dc converters. It acts as an intermediary between energy storage (battery management systems-BMS) and the drivetrain controller on the vehicle control unit (VCU) as well as the on-board charger. This paper describes the most important tasks of the EMS and its interfaces to the BMS and the VCU. To validate the algorithms before integrating them into the vehicle prototype, a detailed Matlab / Simulink-model was created in the project. Test procedures and results from the simulation as well as experiences and comparisons from the real car are presented at the end.
Electric vehicle;Li-Ion battery system;Energy management system;Battery management system;
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