The busbar accessory is mainly composed of T2 electrolytic copper profiles and can be used to provide thermal expansion compensation, avoiding bending deformation of the sliding contact line system due to temperature changes. The dataset includes major raw materials, energy inputs, and wastes from the production process; infrastructure such as production equipment and factory construction is not included within the system boundary of the dataset. The life cycle inventory is compiled from data obtained from multiple sources. The manufacturing process of the busbar accessory includes cutting to specified lengths, chamfering and deburring, punching and edge finishing, and packaging.