Johannes Betz
Postdoc @ Penn
Publications
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VEM - Virtuelle Elektromobilität im Taxi - und Gewerbeverkehr München : neuartiger Ansatz zur Untersuchung von technischen, wirtschaftlichen und ökologischen Gesichtspunkten einer elektrifizierten Fahrzeugflotte : Schlussbericht für das BMWi-Förderprojekt IKT für Elektromobilität II
Within the project „VEM – Virtual Electromobility in Taxi and Commercial Traffic Munich“, vehicle and infrastructure concepts of a vehicle fleet to be electrified were simulated. Vehicles of the second largest German cab fleet and selected companies of the Chamber of Crafts for Munich and Upper Bavaria, whose employees depend on the commercial use of vehicles, were equipped with smartphones. The sensors in the smartphones were used to record the signals required for the simulation. The aim was to investigate various vehicle and infrastructure concepts for cab and commercial traffic in the Munich area. By varying the virtual vehicle architecture with regard to energy storage and drive in the simulation model, it was possible to obtain information about suitable electromobility concepts. In addition, different charging options and locations were to be specified in the simulation program during the course of the experiment and the influence on the infrastructure network evaluated. A statement about the effectiveness and costs of an electrification of larger vehicle fleets regarding technical, ecological and economic aspects should be made possible within the scope of this project.
Schlussbericht für das BMWi-Förderprojekt IKT für Elektromobilität II : Teilvorhaben der Handwerkskammer für München und Oberbayern (HWK)
Evaluation of the potential of integrating battery electric vehicles into the energy structure of a commercial company
This paper presents the evaluation of the potential of integrating battery electric vehicles into the energy structure of a commercial company. First, this evaluation is done by analyzing fleet test data of 35 commercial vehicles. The goal is to evaluate how long and how often a commercial vehicle is parked at the company location. Second, smart meter data which was recorded over a period of three years for one commercial company is analyzed. The recorded data displays the time dependent energy flow of energy producers (photovoltaic systems, combined heat and power systems), energy consumers (base load of the company, different household consumers) and energy used to charge a battery electric vehicle. The goal is to evaluate the potential of a technically and economically rewarding integration of battery electric vehicles in commercial companies. The energy used to charge the electric vehicles will be evaluated to define the degree of integration into the total energy structure. It will be compared to the total energy within the system to determine the potential of enhancing profitability while charging. Furthermore those results will be compared to an exemplary private household (smart home).
Approach for the development of a method for the integration of battery electric vehicles in commercial companies, including intelligent management systems
Current analyses of electric mobility reveal that the electrification of the powertrain of vehicles will change the entire automotive value chain. This paper presents the approach for the development of a method for the evaluation of an economically and ecologically rewarding integration of electric vehicles in commercial companies. First, this method focuses on the analysis of the driving behavior of a commercial vehicle fleet and the energy flow (consumption and production) in a company. Second, it is the goal to evaluate the potential of integrating battery electric vehicles in a commercial company using a new developed fleet-management system in combination with an energy- and charging-management system. The potential of integration will be depicted by the number of battery electric vehicles that can be integrated, the reduction of the total costs of ownership, and the reduction of the produced CO2 emissions.
Visio.M – Leichtfahrzeugkonzept für die urbane Elektromobilität
In the Visio.M joint project presented here, the aim was to find ways of building small, efficient electric vehicles so safely and inexpensively that they could achieve a significant share of the mass market. The visionary mobility concept to be derived from this is to be a vehicle that meets the requirements of registration class L7e with an output of 15 kilowatts and a maximum unladen weight of 450 kilograms (without battery). In order to implement electromobility in a meaningful way, it is necessary to adapt the entire vehicle concept both to the changed boundary conditions of the drive system and to the planned application scenario. The biggest challenge is to reduce costs to a competitive level. The biggest cost driver is currently the energy storage system. In order to keep it as small as possible, the vehicle was designed efficiently. By consistently minimizing the driving resistances, reducing the total weight and increasing the efficiency, it is already possible to represent an inexpensive electric vehicle at today’s energy storage costs. A low vehicle mass is achieved through the structural-mechanical optimization of the body and has a direct effect on the energy consumption required for acceleration and thus on the necessary capacity of the energy storage system carried along. Since the reduced vehicle mass means that the chassis and powertrain can also be made smaller, the weight saved counts several times over for the same range requirement. The project differs in particular by an intensive consideration
EE-Architektur für mobile Dienste
The Visio.M project meets the requirements from the increasing networking of electronic components in the vehicle with the central architecture design, among other things. A central control unit manages the entire vehicle. Through a component-oriented development process, the Automotive Service Bus enables the simple and fast integration of new information sources and their linkage with information from the vehicle and also offers a uniform user interface.