Analysis of the Effect of the Variable Charging Current Control Method on Cycle Life of Li-ion Batteries

In-Ho Cho, Pyeong-Yeon Lee and Jong-Hoon Kim
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In-Ho Cho: Smart Electrical & Signaling Division, Korea Railroad Research Institute, Uiwang-si 16105, Korea
Pyeong-Yeon Lee: Department of Electrical Engineering, Chungnam National University, Daejeon 34134, Korea
Jong-Hoon Kim: Department of Electrical Engineering, Chungnam National University, Daejeon 34134, Korea

Energies, 2019, vol. 12, issue 15, 1-11

Abstract: Applications of rechargeable batteries have recently expanded from small information technology (IT) devices to a wide range of other industrial sectors, including vehicles, rolling stocks, and energy storage system (ESS), as a part of efforts to reduce greenhouse gas emissions and enhance convenience. The capacity of rechargeable batteries adopted in individual products is meanwhile increasing and the price of the batteries in such products has become an important factor in determining the product price. In the case of electric vehicles, the price of batteries has increased to more than 40% of the total product cost. In response, various battery management technologies are being studied to increase the service life of products with large-capacity batteries and reduce maintenance costs. In this paper, a charging algorithm to increase the service life of batteries is proposed. The proposed charging algorithm controls charging current in anticipation of heating inside the battery while the battery is being charged. The validity of the proposed charging algorithm is verified through an experiment to compare charging cycles using high-capacity type lithium-ion cells and high-power type lithium-ion cells.

Keywords: battery charging; cycle-life; state-of-health (SOH); battery cycle-life extension (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: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (10)

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