A New Topology for Electric All-Terrain Vehicle Hybrid Battery Systems Using Low-Frequency Discrete Cell Switching

This article presents an investigation into the feasibility of a novel discrete-switched topology for an electric all-terrain vehicle (e-ATV) hybrid battery system (HBS) that avoids expensive and bulky dc–dc converters using a simpler discrete-switched structure together with an intelligent low-frequency switching algorithm. Hardware is simplified at the expense of more complex control. The algorithm switches cells in and out of series strings, based on their state of charge relative to other cells in the pack and the power being drawn from the pack. The principles are demonstrated using a simulated model combining lithium-titanate-oxide (LTO) and lithium-iron-phosphate (LFP) cells together in an e-ATV battery pack. Despite its simplicity, the intelligent switching algorithm successfully allocates power to different elements of the battery and ensures that the state of charge remains broadly balanced throughout discharge, with the pack ending up in good balance: the LFP cells are in balance to within 0.01% of each other and the LTO cells within 0.1% of each other. While the article focuses on the essential feasibility of the concept, it also identifies future research for including thermal effects, uncertainties in state estimation, cell aging and nonuniformly, and consideration of other powertrain components, for example, motor and power electronics.

• Record URL:
  • http://dx.doi.org/10.1109/TTE.2022.3190167
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/23327782
• Supplemental Notes:
  • Copyright © 2023, IEEE.
• Authors:
  • Gong, You
  • 0000-0002-2850-4943
  • Auger, Daniel J
  • 0000-0002-6199-4251
  • Fotouhi, Abbas
  • 0000-0002-5402-8629
  • Hale, Christopher J
• Publication Date: 2023-3

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: pp 609-621
• Serial:
  • IEEE Transactions on Transportation Electrification
  • Volume: 9
  • Issue Number: 1
  • Publisher: Institute of Electrical and Electronics Engineers (IEEE)
  • ISSN: 2332-7782
  • Serial URL: http://ieeexplore.ieee.org/servlet/opac?punumber=6687316

Subject/Index Terms

• TRT Terms: All terrain vehicles; Control system applications; Electric vehicles; Energy conservation; Lithium batteries; Topology
• Subject Areas: Energy; Highways; Vehicles and Equipment;

Filing Info

• Accession Number: 01929026
• Record Type: Publication
• Files: TRIS
• Created Date: Aug 28 2024 1:22PM