27. Case Study: Thermal System Development for High-Voltage Battery Electric Vehicles

The case study deals with a systems engineering approach applied to a thermal system for a battery electric vehicle. Systems engineering processes, methods, and tools related to the thermal system are discussed. The first part of the chapter describes the overall process of thermal system development, followed by the definition of vehicle use cases and the derivation of vehicle requirements. These requirements are then taken to define the vehicle specification, the configuration, and the relevant thermal systems and their features. The vehicle specification defines the requirements for the vehicle thermal management system. The thermal system specification discusses the feature definition under consideration of the hardware architecture and software control functions, based on the defined use cases. System simulation methods are shown for analysis support during the phases of design and virtual verification and validation. The thermal system integration deals with the integration of hardware and software according to the function-based release plan and the design verification and validation plan and report. Finally, an overview is given of the thermal system verification and validation on a system and vehicle level.