LI-ION BATTERY TECHNOLOGIES FOR NEXT GENERATION HYBRID AND ELECTRIC POWERTRAINS - DEVELOPMENTS OF A CHEMICAL TIER 2 SUPPLIERS

摘要

Publrc discussion of global warming and fuel price trends trigger governmental initiatives for CO_2 Reduction and alternative Powcrtrain incentives. Big global and start up Vehicle Manufacturers and their Suppliers accordingly push the development of next generation low CO_2 Emission powertrains. Depending on target driving cycle and vehicle category new developments focus on parallel and serial Hybrid Electric Powertrains or pure Electric Powertrains.Function, reliability, longevity, safety, packaging, weight and most importantly efficiency of such alternative Powertrains depend on the Energy Storage technology applied. The chemistry of Li-Ion battery materials gives highly attractive and promising key data for packaging, weight and efficiency.The first lecture section details the screening and development of suitable battery materials, cell configurations and first performance test results of 2Ah cells. Cell sizes suitable for HEV and EV application had to be significant enlarged to reduce complexity of the final vehicle Battery Pack design. The process of scaling up the cell size is shown, giving examples for both Powcrtrain types, HEV and EV.The second lecture section covers principle design options and selected solutions regarding components and packaging of a typlcal EV Battery Pack. Fixation, Cooling and Connecting of cells and final battery pack assembly is shown in detail.The last lecture section describes the lay out, design and development of a complete City EV Powcrtrain and its integration into a typlcal European Passenger Car. The initial target list and related performance calculation were used to select and apply market and available powertrain components. The final assembly of the Prototype City EV is demonstrated. The lecture concludes and discusses gained development experiences.An outlook of future EV Powertrains finalizes the lecture.