Active balancing system for electric vehicles with incorporated low voltage bus

Daniel Costinett, Kelly Hathaway, Muneeb Ur Rehman, Michael Evzelman, Regan Zane, Yoash Levron, Dragan Maksimovic

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

38 Scopus citations

Abstract

Electric-drive vehicles, including hybrid (HEV), plug-in hybrid (PHEV) and electric vehicles (EV), require a high-voltage (HV) battery pack for propulsion, and a low-voltage (LV) dc bus for auxiliary loads. This paper presents an architecture that uses modular dc-dc bypass converters to perform active battery cell balancing and to supply current to auxiliary loads, eliminating the need for a separate HV-to-LV high step-down dc-dc converter. The modular architecture, which achieves continuous balancing of all cells, can be used with an arbitrary number of cells in series, requires no control communications between converters, and naturally shares the auxiliary load current according to the relative state-of-charge (SOC) and capacities of the battery cells. Design and control details are provided for low-voltage, low-power dual active bridge (DAB) power converters serving as bypass converter modules. Experimental results are presented for a system consisting of two series 3.6 Ah NMC battery cells and two DAB bypass converters, with combined outputs rated to supply a 12 V, 35 W auxiliary load.

Original languageEnglish
Title of host publicationAPEC 2014 - 29th Annual IEEE Applied Power Electronics Conference and Exposition
PublisherInstitute of Electrical and Electronics Engineers
Pages3230-3236
Number of pages7
ISBN (Print)9781479923250
DOIs
StatePublished - 1 Jan 2014
Externally publishedYes
Event29th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2014 - Fort Worth, TX, United States
Duration: 16 Mar 201420 Mar 2014

Publication series

NameConference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC

Conference

Conference29th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2014
Country/TerritoryUnited States
CityFort Worth, TX
Period16/03/1420/03/14

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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