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Open AccessArticle

Add-On Type Pulse Charger for Quick Charging Li-Ion Batteries

1
EV Component & Materials R&D Group, Korea Institute of Industrial Technology, Gwangju 61012, Korea
2
Department of Electrical Engineering, Chungnam National University, Daejeon 34134, Korea
*
Author to whom correspondence should be addressed.
Electronics 2020, 9(2), 227; https://doi.org/10.3390/electronics9020227
Received: 31 December 2019 / Revised: 21 January 2020 / Accepted: 28 January 2020 / Published: 30 January 2020
(This article belongs to the Special Issue Power Converters in Power Electronics)
In this paper, an add-on type pulse charger is proposed to shorten the charging time of a lithium ion battery. To evaluate the performance of the proposed pulse charge method, an add-on type pulse charger prototype is designed and implemented. Pulse charging is applied to 18650 cylindrical lithium ion battery packs with 10 series and 2 parallel structures. The proposed pulse charger is controlled by pulse duty, frequency and magnitude. Various experimental conditions are applied to optimize the charging parameters of the pulse charging technique. Battery charging data are analyzed according to the current magnitude and duty at 500 Hz and 1000 Hz and 2000 Hz frequency conditions. The proposed system is similar to the charging speed of the constant current method under new battery conditions. However, it was confirmed that as the battery performance is degraded, the charging speed due to pulse charging increases. Thus, in applications where battery charging/discharging occurs frequently, the proposed pulse charger has the advantage of fast charging in the long run over conventional constant current (CC) chargers. View Full-Text
Keywords: add-on pulse charger; quick charge; pulse charging; Li-ion battery add-on pulse charger; quick charge; pulse charging; Li-ion battery
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Kwak, B.; Kim, M.; Kim, J. Add-On Type Pulse Charger for Quick Charging Li-Ion Batteries. Electronics 2020, 9, 227.

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