Development of measures to increase the cruising range of electric buses by installing thermal control system based on phase transitional heat acumulating materials

Abstract

Introduction. The problems of the mass use of electric buses on urban routes are low operational indicators, including the life of traction batteries (TAB), a significant limited autonomous travel compared to motor vehicles based on internal combustion engines, high cost of batteries, limited implementation of charging infrastructure, deterioration of efficient operation at low ambient temperatures, etc. Most operating parameters depend on the efficiency of replenishment, storage and consumption of electricity on board the electric bus, which include: power reserve, TAB life and economic costs for operation.Materials and methods. The work uses methods of numerical modelling of the movement of the KAMAZ 6282 electric bus under the conditions of the SORT 2: MIXED test cycle.Result. In this work, the balance of electric energy on board the КАМАZ 6282 electric bus during its operation on the city route was analyzed, and the search for the most rational ways of its consumption was carried out due to the introduction of thermal control systems for the passenger compartment and the driver’s workplace based on the installation of a heat accumulator (HA) with phase transfer heat accumulating materials (PFTAM).Discussion and conclusion. The installation of the proposed PFTAM-based system, provided that the range is provided at the level of the serial model, enables to reduce the battery capacity by 24% (up to 549 MJ) or, while maintaining the capacity of 720 MJ, increase the range by 44% up to 130 km.

Keywords

• urban route
• electric bus
• electric energy balance
• thermoregulation system
• phase-transfer heat-accumulating materials