Empirical Capacity Degradation Model for a Lithium-Ion Battery Based on Various C-Rate Charging Conditions

Lithium-ion batteries are widely used in many applications due to their high energy density, high efficiency, and excellent cycle ability. Once an unknown Li-ion battery is reusable, it is important to measure its lifetime and state of health. The most favorable measurement method is the cycle test,...

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Bibliographic Details
Published in:Journal of Electrochemical Science and Technology 2024-08, Vol.15 (3), p.414-420
Main Authors: Kim, Dong Hyun, Lee, Juhyung, Shin, Kyungseop, Kim, Kwang-Bum, Chung, Kyung Yoon
Format: Article
Language:English
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Summary:Lithium-ion batteries are widely used in many applications due to their high energy density, high efficiency, and excellent cycle ability. Once an unknown Li-ion battery is reusable, it is important to measure its lifetime and state of health. The most favorable measurement method is the cycle test, which is accurate but time- and capacity-consuming. In this study, instead of a cycle test, we present an empirical model based on the C-rate test to understand the state of health of the battery in a short time. As a result, we show that the partially accelerated charge/discharge condition of the Li-ion battery is highly effective for the degradation of battery capacity, even when half of the charge/discharge conditions are the same. This observation provides a measurable method for predicting battery reuse and future capacity degradation.
ISSN:2093-8551
2288-9221
DOI:10.33961/jecst.2024.00241