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Modularized Simulation Tool to Evaluate Battery Solutions for 12 V Advanced Start Stop Vehicles
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 03, 2018 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
The 12 V advanced start stop systems can offer 5-8% fuel economy improvement over a conventional vehicle. Although the fuel economy is not as high as those of mild to full hybrids, its low implementation cost makes it an attractive electrification solutions for vehicles. As a result, the 12 V advanced start stop technology has been evolving fast in recent years.
On one hand, battery suppliers are offering a variety of energy storage solutions such as stand-alone lead acid, stand-alone LFP/Graphite, dual batteries of lead acid parallel with NMC/LTO, LMO/LTO, NMC/Graphite, and capacitors, etc. For dual battery solutions, the architecture also varies from passive parallel connection to active switching. On the other hand, OEM are considering to leverage a lot more use out of traditional 12 V SLI (start, light, and ignition) for functions such as power steering, air conditioning, heater, etc. Depending on battery architecture and vehicle functioning design, the energy management strategy can easily become complicated.
Since many variables are involved in the design of 12 V advanced start stop systems, an integrated simulation tool with a couple of modularized models including vehicle, batteries, and performance characterization have been developed. The modularized tool would help to evaluate many aspects of the design from motor size selection, power network management, battery evaluation, testing standardization. As a specific demonstration, in this work, we use the tool to compare three chemistries: stand-alone AGM, stand-alone LFP, and dual batteries of lead acid and LTO for different driving cycles including NEDC, WLTP, FTP72, and HWFET as function of motor size.
CitationZhang, Z., Jin, Z., and Watson, T., "Modularized Simulation Tool to Evaluate Battery Solutions for 12 V Advanced Start Stop Vehicles," SAE Technical Paper 2018-01-0446, 2018, https://doi.org/10.4271/2018-01-0446.
Data Sets - Support Documents
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- Zhang, Z., Rick, A., and Sisk, B. , “Model Development and Simulations of 12 V Dual Batteries Towards Design Optimization of Microhybrid Vehicles,” SAE Technical Paper 2015-01-1199 , 2015, doi:10.4271/2015-01-1199.
- Zhang, Z., Jin, Z., and Wyatt, P. , “Model-Based Evaluation of Chemistry Selection for Dual Energy Storages for 12 V Advanced Start Stop Vehicles,” SAE Technical Paper 2016-01-1209 , 2016, doi:10.4271/2016-01-1209.