AN ENGINEERING DESIGN APPROACH TO LITHIUM-ION CELLS - MODULAR KIT CONFIGURATION FOR AN INNOVATIVE TECHNOLOGY APPLICATION
Year: 2015
Editor: Christian Weber, Stephan Husung, Gaetano Cascini, Marco CantaMESsa, Dorian Marjanovic, Frederico Rotini
Author: Tschech, Matthias; Vietor, Thomas
Series: ICED
Institution: TU Braunschweig, Germany
Section: Product Modularisation, Product Architecture, Systems Engineering, Product Service Systems
Page(s): 115-124
ISBN: 978-1-904670-70-4
ISSN: 2220-4334
Abstract
Introducing a significant fleet share of electric or plug-in hybrid electric vehicles seems indispensable for vehicle manufacturers to fulfil CO2-emission regulations. The cost situation for lithium-ion batteries is one of the key limitations for the market potential of electric vehicles. This work introduces a value based engineering approach for the application in this specific technology.
General quantitative relations between cost and function are determined by using a detailed lithium-ion cell model, which links material properties, design parameters and costs to the key functions storable energy and available power. The optimal cost situation is identified when the power to energy ratio of the cell directly matches the power and energy requirement of the vehicle. For a multiple project portfolio this implies a specific cell for each vehicle project. The potentially large number of cell types seems unfavorable for OEMs especially due to onetime expenses in development and validation. Therefore a genetic algorithm optimization is applied to determine the cost optimal electrode designs and number of cell versions to address an exemplary vehicle portfolio case.
Keywords: Design Costing, Platform Strategies, Optimisation, Lithium-Ion Batteries, Electric Vehicles