Since the use requirements of electric vehicle charging cables are different from those of conventional wire and cable, the current wire and cable standards are difficult to cover all the requirements of charging cables, so it is necessary to develop independent charging cable product standards to promote the healthy development of the industry.
Since the use requirements of the electric vehicle charging cable are different from those of the conventional wire and cable, the current wire and cable standard is difficult to cover all the use requirements of the charging cable, so it is necessary to develop an independent charging cable product standard to promote the healthy development of the industry. Considering the mechanical performance requirements, electrical performance requirements, safety, environmental protection and service life of charging cables, new low-smoke halogen-free flame retardant materials, polyester elastomers, polyurethane materials, etc. are more suitable for charging cables. Insulation materials and sheath materials have become the development direction of charging cable products. The new halogen-free material is halogen-free, produces no harmful gases and corrosive gases when burned, and has low smoke generation and good flame retardant properties. It has high safety; in terms of mechanical properties, halogen-free materials and polymerization Compared with the materials specified in IEC60245 and IEC60227 standards, ester-based materials have higher mechanical properties, ensuring reliability and longevity during the use of charging cables, and the main technical specifications of new materials and the materials specified in the IEC60245 standard. The index pairs are shown in Tables 2 and 3, in which IEV-1 is a halogen-free thermoplastic polyolefin material or a polyester material, and EVI-2 is a halogen-free thermosetting polyolefin or ethylene-propylene rubber mixture. The charging cable jacket layer has the function of protecting the cable and may encounter a large external force during use, so it requires higher mechanical properties, a new polyurethane sheathing material and a halogen-free flame-retardant thermosetting polyolefin. Or the sheath material such as ethylene-propylene rubber mixture has high tensile strength, which is obviously higher than the performance of materials in IEC60245 and IEC60227 standards. The main technical indexes are shown in Table 4, where EVM-1 is polyurethane sheathing material. EVM-2 is a halogen-free flame-retardant thermosetting polyolefin or ethylene-propylene rubber blend. The new materials have good mechanical properties, and IEC does not currently have wire and cable product standards for these two materials. At present, new insulating materials and sheath materials have become the development trend of charging cable product materials, with broad development space and development potential; in addition, PVC materials, cross-linked polyethylene materials, etc. have already been fixed in charging cables. Applications. In order to ensure the development of the specification of charging cable products, the corresponding charging cable standards should be established as soon as possible to provide a basis for the research and production of charging cable products.
February 23, 2023
