Optimizing Lithium-Ion Batteries - Tailoring Electrodes for Microhybrid Vehicle Applications

Paper #:
  • 2014-01-1836

Published:
  • 2014-04-01
DOI:
  • 10.4271/2014-01-1836
Citation:
Sisk, B. and Zhang, Z., "Optimizing Lithium-Ion Batteries - Tailoring Electrodes for Microhybrid Vehicle Applications," SAE Int. J. Alt. Power. 3(1):86-97, 2014, https://doi.org/10.4271/2014-01-1836.
Pages:
12
Abstract:
Design of batteries for automotive applications requires a careful balance between vehicle requirements - as driven by automakers - and cost. Typically, for batteries, the goal is to meet the most stringent requirement at a competitive cost. The real challenge in doing so is understanding how the battery-level requirements vary with changes in the vehicle, powertrain, and drive cycle.In this work, we consider the relationship between vehicle-level and battery-level requirements of microhybrid vehicles and their linkage with battery design. These vehicle platforms demand high-power pulses for impractical durations - over 60 seconds on some drive cycles.We demonstrate a method for optimizing the battery design for fuel economy against any specific drive cycle, whether regulatory, consumer, or otherwise. This method allows for a high degree of customization against manufacturer or consumer value. Electrochemical modeling and vehicle modeling, coupled with experimental validation, is used to investigate the effects of key battery design parameters - such as particle size and coating thickness - on the energy and power capability of lithium ion batteries.
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