Development of DC-DC Converter with AC Impedance Diagnosis Function of Energy Devices

2016 Fiscal Year Final Research Report

• Project/Area Number: 15K18027
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Power engineering/Power conversion/Electric machinery
• Research Institution: Tokyo University of Science
• Principal Investigator: Katayama Noboru 東京理科大学, 理工学部電気電子情報工学科, 講師 (00609373)
• Project Period (FY): 2015-04-01 – 2017-03-31
• Keywords: 交流インピーダンス / 燃料電池 / 太陽電池

Outline of Final Research Achievements

In this study, we introduced wavelet transformation to the DC-DC converter with impedance diagnosis function we have developed to obtain time-dependent impedance in order to improve the measurement accuracy, and compared with short time Fourier transformation, which is also used as time-frequency analysis method. Next, to apply our method to various energy devices and to improve its capacity, we realized measurement for each cell in a fuel cell stack, and investigated the relationship between the SoC and the impedance of a lithium-ion battery under various charge-discharge cycle conditions.

Free Research Field

エネルギー工学