Vehicle level. In the early phases of the ID4EV project it was the goal to structure the domain of an EV with the help of a feature model. In this phase of the development also use cases and requirement documents were worked out by the partners. The main emphasis was given the definition of the requirements, but also use cases and features were discussed. On model level there is no direct linking from requirements, use cases, or features to the analysis and design model. This work could not be done within the ID4EV or MAENAD project.
Vehicle level. The main feature of a fully electric vehicle (FEV) is the using of high voltage electrical energy for driving, provided by a battery. The High Voltage Junction Box is distributing the energy to different consumers or providers. The main consumer is the drivetrain, consisting of power electronic and e- machine. But there are others as heater or compressor. These consumers are not part of this model. The energy is provided by a charger. There might be different chargers connected to the high voltage junction box. They are not modeled either. It has to be assured that no one touches high voltage unintentionally. Furthermore it is important to supervise the proper function of all high voltage connections. For this reason the interlock line is established. That is every high voltage connector has two additional contacts which are connected to each other as long as the connector is plugged in completely. As soon as one connector is released the interlock is opened. When this occurs the high voltage supply is disconnected immediately. This function is required to assure that persons do not have contact to the high voltage under all circumstances. Maybe a connector is damaged after an accident. Then the high voltage supply has to be stopped to avoid any further damage of persons. It is dangerous to stop the emachine in case the interlock line was opened by mistake. If this happens during a takeover maneuver the vehicle will lose driving energy immediately. As the Electric Vehicle Controller is the main controller for many powertrain functions of an electric vehicle. It provides the information to feed the interlock line to the HVJB. This is done by a dedicated signal on the connection Feed interlock between EVC and HVJB. Thus the EVC is the beginning of the interlock line. Furthermore the EVC is then the endpoint of the interlock line – connection Evaluate interlock between HVJB and EVC. In the EVC the evaluation of the status of the interlock line is done. As a result of this evaluation the EVC may decide to shut down the high voltage which is done with the connection PowerSourceEnable and to stop the torque request from the Powerelectronic.
