Composite Sinusoidal Waveform Generated by Direct Digital Synthesis for Healthy Charging of Lithium-Ion Batteries

Po-Tuan Chen, Fu-Yen Zeng, Xuan-Hao Zhang, Ren-Jei Chung, Cheng-Jung Yang and K. David Huang
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Po-Tuan Chen: Center for Condensed Matter Sciences, National Taiwan University, Taipei 10617, Taiwan
Fu-Yen Zeng: Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei 10608, Taiwan
Xuan-Hao Zhang: Department of Vehicle Engineering, National Taipei University of Technology, Taipei 10608, Taiwan
Ren-Jei Chung: Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei 10608, Taiwan
Cheng-Jung Yang: Department of Mechanical Engineering, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan
K. David Huang: Department of Vehicle Engineering, National Taipei University of Technology, Taipei 10608, Taiwan

Energies, 2020, vol. 13, issue 4, 1-13

Abstract: To address the defects in lithium-ion battery lifespan, this paper proposes a composite waveform generation strategy that offers capacity-recovering effect. Based on digital architecture, this study exploits direct digital synthesis (DDS) to generate data, which are then processed in an analog-to-digital converter to produce a predefined voltage waveform signal. In the process, an arbitrary waveform is converted to digital voltage waveform signal through pulse width modulation (PWM) technology, thus realizing waveform generation through DDS. Subsequently, analog-to-digital conversion is accomplished by going through a buck circuit, resulting in a composite sinusoidal waveform that is used to charge the battery with a recovering effect. This paper comprises an introduction of effective waveforms for capacity recovering, methods of generating composite sinusoidal waveforms, and an example of the application of composite sinusoidal waveform generation. The waveform produced by the circuit may recover the capacity of an aged 18650 lithium-ion battery by about 8%.

Keywords: composite sinusoidal waveform charging; direct digital synthesis; pulse width modulation; lithium-ion battery (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
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