Abstract
Keywords - DC/DC Converter, Supercaps, Fuel and CO2-emission reduction, Hybridization, Power- Electronics
In the light of increasing hybridization of future vehicle generations mainly those functionalities will be realized which contribute to fuel- and at the end emission-reduction. Recuperation, Start-Stop, E-steering and EDS-stabilization therefore constitute applications for which an efficient energy management has to be provided.
In this context ALCOA / AFL Europe GmbH developed a patent pending system solution, by which in one single unit a powerful DC/DC converter is integrated with the storage medium EDLC or Super-/Ultracap - on the one hand the restrictive packaging and on the other hand high performance requirements of the OEM can be met in a high degree. Possible issues arising from the compact integration of the supercaps such as heat dissipation and EMI are solved in a unique way - even the impacts in case of a defect cell are eliminated by a sophisticated balancing.
The main performance characteristics of the currently finished 1 KW solution that is in test status at various OEMs are:
- Output: 1 KW bidirectional
- Capacity: 29,8 F / 12 Cells a 350 F
- Additional fused power output
- Optional output for consumers during motor start
- Protection class IP 6K7
- Buck/Boost converter 2-phases
- Operating frequency 125 kHz
- Current control and phase monitoring realized in HW
With its scaleable approach and the possibility to be integrated rapidly and cost-efficiently in new carlines, the ECM just today combines the advantages of an intelligent electric power management. New prospective application-ranges - i.e. up to 5 KW for commercial vehicles and/or buses - are right now under development and should move its way in to series implementation soon.