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Naehyuck Chang

2-5-6 Project Director

Project : Power design and energy harvesting/conversion/management technique for low-power ubiquitous sensor systems
Purpose This year project attempt three challenging research topics. First, we will commercialize the storage-less and converter-less maximum power point tracking circuit and its application for a ultraviolet sending patch (SmartPatch). Second, we will develop Korean environment friendly, reconfigurable, supercapacitor and Li-ion Phosphate battery hybrid solar energy harvesting systems. Third, we will develop fast dynamic reconfigurable photovoltaic array systems for light-weight partially solar powered full electric vehicles.
Contents o Commercialization of SmartPatch
- Tuning the SmartPatch photovoltaic cell for actual seasonal solar irradiance
- Form factor and weight reduction
- Field test
o Korean environment friendly solar energy harvesting and storage systems
- Design and implementation of a reconfigurable photovoltaic cell array against seasonal weather and partial shading change
- Design and implementation of a reconfigurable photovoltaic cell array against seasonal and daily temperature change
- General power supply (conversion) circuits and joint power management
- Supercapacitor and Li-ion Phosphate battery hybrid systems
o Fast dynamic reconfigurable photovoltaic cell array for light-weight partially solar powered full electric vehicles
- High-voltage, fast photovoltaic cell reconfiguration circuits and algorithms
- Interface design between the reconfigurable photovoltaic array controller and the vehicle network
- The optimal reconfiguration algorithm while driving and parking
- Field test on a real electric vehicle
Expected Contribution We expect the following contributions to the academia and industry by focusing on implementation and verification of actual sensor systems.
- Commercialization technologies for low-cost and maintenance free SmartPatch.
- Solar energy harvesting and storage system technologies for Korean weather aiming at higher efficiency and longer battery life
- Maximum energy harvesting of solar energy for onboard photovoltaic cells on electric vehicles
Publication
No Title Year Phase
2 A Statistical Model-Based Cell-to-Cell Variability Management of Li-ion Battery Pack 2015.02. Phase 2
2nd year
1 Optimizing the Power Delivery Network in a Smartphone Platform 2014.01. Phase 2
1st year
1
Patent
No Title Country Date Phase
2 전력변환기가 없는 에너지 공급 회로 및 이를 이용한 전자장치 PCT 2014-10-21 Phase 2
2nd year
1 전력변환기가 없는 에너지 공급 회로 및 이를 이용한 전자장치 KR 2013-10-21 Phase 2
1st year
1
Conference
No title Conference Name Date Phase
13 Energy Management Techniques for Hybrid Energy Storage Systems in Electric Vehicles PhD Forum at DAC 2014-06-01 Phase 2
1st year
12 Design and Runtime Optimization of Hybrid Electrical Energy Storage Systems EDAA Outstanding Dissertation Award 2014-03-25 Phase 2
1st year
11 FEPMA: Fine-Grained Event-Driven Power Meter forAndroidSmartphonesBasedonD⇤eviceDriver Design Automation and Test in Europe (DATE) 2014-03-24 Phase 2
1st year
10 Storage-less and converter-less maximum power point tracking of photovoltaic cells for a nonvolatile microprocessor Asia South Pacific Design Automation Conference (ASP-DAC) 2014-01-20 Phase 2
1st year
9 Analysis of Storage- and Converter-less Maximum Power Point Tracking of Photovoltaic Cells ACM SIGDA Student Reserach Competition 2013-11-19 Phase 2
1st year
8 Computer-Aided Design of Electrical Energy Systems IEEE/ACM International Conference on Computer-Aided Design (ICCAD) 2013-11-18 Phase 2
1st year
7 Designing a Residential Hybrid Electrical Energy Storage System Based on the Energy Buffering Strategy International Conference on Hardware/Software Codesign and System Synthesis (CODES+ISSS) 2013-09-29 Phase 2
1st year
6 Maximum Power Transfer Tracking in a Solar USB Charger for Smartphones International Symposium on Low Power Electronics and Design (ISLPED) 2013-09-04 Phase 2
1st year
5 A Statistical Model of Cell-to-Cell Variation in Li-ion Batteries for System-Level Design International Symposium on Low Power Electronics and Design (ISLPED) 2013-09-04 Phase 2
1st year
4 A Framework of Concurrent Task Scheduling and Dynamic Voltage and Frequency Scaling in Real-Time Embedded Systems with Energy Harvesting International Symposium on Low Power Electronics and Design (ISLPED) 2013-09-04 Phase 2
1st year
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