The effect of elastic and plastic stresses on the electrical resistivity of conductive materials

• Published in: IOP conference series. Materials Science and Engineering Vol. 1307; no. 1; pp. 12046 - 12053
• Main Authors: Steinlehner, F., Ott, M., Stiegeler, B., Maier, L., Nguyen, Q., Volk, W.
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 01.05.2024
• Subjects: Charging; Electric cables; Electric potential; Electric vehicles; Electrical resistivity; Greenhouse gases; Manufacturing; Voltage
• ISSN: 1757-8981; 1757-899X
• DOI: 10.1088/1757-899X/1307/1/012046

Abstract The mobility sector has been responsible for large emissions of harmful greenhouse gases worldwide for years. E-mobility can contribute to a reduction of these emissions. For a faster spread and acceptance of electric vehicles, the achievable range and thus the efficiency of the individual components in the drive and charging train is essential. In addition to the battery and the electric machine, losses in the cables and bus bars are playing an increasingly important role. The cross-sectional shape, material and manufacturing technology of these conductive materials depends on the voltage and power to be transmitted and may still change in the future, especially in the field of fast charging and increased voltage. The aim of this work is to investigate the influence of the mechanical stress condition of copper, brass and aluminium materials on their electrical conductivity. The conductivity is measured by means of 4-wire measurements under defined tensile and compressive loads. The effects of elastic and plastic strains are taken into account. The findings can be used for an optimized manufacturing strategy for conductive components for future applications.