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research-article

Electrical contact resistance estimation with application to electric vehicle charging cable

[+] Author and Article Information
Jocelyn Sabatier

Professor, IMS Laboratory, Bordeaux University, Talence, 33405, France
jocelyn.sabatier@u-bordeaux.fr

Mathieu Chevrie

Ph.D., IMS Laboratory, Bordeaux University, Talence, 33405, France
mathieu.chevrie@u-bordeaux.fr

Christophe Farges

Associate Professor, IMS Laboratory, Bordeaux University, Talence, 33405, France
christophe.farges@u-bordeaux.fr

Franck Guillemard

Ph.D., Scientific and Future Technologies Department, PSA Groupe, Vélizy-Villacoublay, 78943, France
franck.guillemard@mpsa.com

Laetitia Pradere

Research Engineer, Scientific and Future Technologies Department, PSA Groupe, Vĺizy-Villacoublay, 78943, France
laetitia.pradere@mpsa.com

1Corresponding author.

ASME doi:10.1115/1.4037531 History: Received November 09, 2016; Revised August 01, 2017

Abstract

The paper proposes a method to estimate the contact resistance inside the outlet between a charging cable and an electric vehicle. First, an electrothermal model of some components close to the contact area inside the vehicle outlet (in the female part of the outlet) and of the harness inside the vehicle is proposed. The charging cable and the associated components are the male parts of the outlet and are not modeled as these components are not identical for each charging. They also depend on the mode and the charging infrastructure used. It is only supposed that the charging cable evacuates an unknown thermal heat flux. A linear approximation of the electrothermal model is then obtained and used to design a closed-loop estimator of the total heat flux at the contact area. Using this information, a least square method is used to estimate the contact resistance that can be deduced from the first values of the total heat flux after a step variation of the current in the charging cable.

Copyright (c) 2017 by ASME
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