Chemical, Thermal, and Mechanical Characterization of Thermally Oxidized Crosslinked Polyolefin (XLPO) High-Voltage Battery Cable Insulation

The insulation and jacket of a model automotive battery cable (150°C-rated) was characterized. Samples were subjected to increased thermal oxidation in a laboratory oven at 175°C for 9 weeks with samples removed weekly. Champlain Cable’s EXRAD® ERGOFLEX ISO 19642-9 Thin Wall Shielded Battery Cable was selected as a model cable for its accessibility, history, safety significance, and environment. The presentation will include multiple characterization methods to assess chemical, mechanical, and thermal properties. One of the highlights, Laser Induced Breakdown Spectroscopy (LIBS) will be presented as a valuable data collection method to assess changes in elemental composition over time. Examples will focus on elements related to cable oxidation, flame retardant changes, compositional differences between the insulation and the jacket.