Intelligent Electrification
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HIGH-VOLTAGE AND 48 -V SYSTEMS
Intelligent Electrification
Supercapacitors – 16 Automotive Solutions for Comfort, Safety, and CO2 Reduction Massimo Venturi, Fabian Brauss, Hans-Peter Daub [Eberspächer]
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“The Path toward More Powerful 22 Battery Systems with Long Life”
Tackling the Challenges of 26 Electric Vehicle Fast Charging
Interview with Sebastian Pohlmann
Pradip Chatterjee, Markus Hermwille
[Skeleton Technologies]
[Infineon Technologies]
Increasing comfort requirements, autonomous driving and reductions in CO2 lead to a growing demand for electrical power in a vehicle with a simultaneous rise in system variations. Additionally, increasing transient loads and the growing requirement for high cycle rates and redundant safeguarding require new ways of storing energy in the vehicle’s electrical system. This is where supercapacitors have huge advantages, both as individual cells for low-voltage storage as well as interconnected as a module for energy storage in 12-V, 24-V or 48-V electrical systems. The systems are normally not in competition with conventional lead or lithium-ion batteries, but offer themselves as a cost-effective and easy supplement for conventional batteries in specific use-cases, as Eberspächer shows. A fast DC charging infrastructure is a critical criteria for the success of electric mobility, because otherwise, the use of BEVs will be limited to shorter distances. Infineon describes how Si/SiC power electronics and the optimally designed topologies based on them, in combination with appropriate microcontrollers and sophisticated authentication and security solutions, will drive the DC charging infrastructure forward for future traffic requirements. Recuperation processes frequently last less than 5 s, a period of time that is too short for batteries to recuperate energy, but not for ultracapacitors. Sebastian Pohlmann, Vice President of Innovation at Skeleton Technologies, discusses in the interview the combination of systems consisting of batteries or fuel cells and super-/ultracapaci tors and holds the view that they can help both variants function more efficiently. The approach for heavy-duty vehicles or local public transport is of particular interest regarding the use of recuperated energy. © Siberian Art | stock.adobe.com
Alexander Heintzel
ATZ electronics worldwide 10|2020
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