Establishment of transition point in operating mode for Constant Current Constant Voltage (CC-CV) charging of Li-ion batteries
1 Electrical and Electronics Engineering, Birla Institute of Technology, Mesra, Ranchi, India.
2 Mineral Processing Division, CSIR-National Metallurgical Laboratory, India.
Research Article
World Journal of Advanced Engineering Technology and Sciences, 2021, 03(01), 072-083.
Article DOI: 10.30574/wjaets.2021.3.1.0053
Publication history:
Received on 23 June 2021; revised on 22 August 2021; accepted on 24 August 2021
Abstract:
The present-day Li-ion batteries when operated, needs precise monitoring of the charging voltage. Several charging techniques have been tested so far with varying degrees of success. One of the most widely used charging techniques is the CC-CV (constant current constant voltage) charging. When performing this, the safety considerations must be maintained with respect to over voltage charging which is a very common problem during constant current charging. In order to prevent over voltage charging, the charging mode must be then shifted from CC to CV mode. So, this transition point of the charging mode from CC to CV is very crucial for the safe operation and health of the battery in the long run. The problem is that, this transition point doesn’t remain the same for the battery. So, in this paper the factors on which it depends are discussed and a Li-ion battery was charged in a few different charging rates using the CC-CV technique to demonstrate the process.
Keywords:
Constant current charging; Constant voltage charging; SoC estimation; Battery safety; Charging rate
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