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Development of Novel MSCCCTCV Charging Strategy for Health

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2025-08-20 02:48

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Abstract:

This research introduces a new charging methodology, the multistep constant-current constant-temperature constant-voltage (MSCCCTCV) strategy. The main objective of this ...Show More

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Abstract:

This research introduces a new charging methodology, the multistep constant-current constant-temperature constant-voltage (MSCCCTCV) strategy. The main objective of this approach is to achieve rapid battery charging while giving utmost importance to maintaining battery longevity. The thermoelectric aging cell model (TEACM) is introduced, which incorporates impedance, thermal, and aging models within a robust semi-empirical framework. The accuracy of voltage detection, current detection, and cycle life prediction by the TEACM was found to be 91%, 97%, and 99%, respectively, as evidenced by experimental results obtained from a cell cycling test bench. A personalized charging strategy is developed by employing a quad-objective genetic algorithm (QOGA) based on the TEACM parameters. The optimization process employed by the QOGA considers the maximum allowable temperature and charging rate values, aiming to minimize charging time, degradation rate, energy loss, and temperature increase. Additionally, this research presents three novel charging strategies based on the number of CC steps employed, namely single-step, dual-step, and triple-step. The findings indicate that implementing the triple-step CCCTCV approach leads to a reduction of 31% in charging time and an enhancement of 66% in cycle life compared to the conventional 1C CC-CV charging technique.

Page(s): 4432 - 4440

Date of Publication: 11 September 2023

ISSN Information:

I. Introduction

The popularity of battery-fast charging technologies has been attributed to the extended charging duration of electric vehicles (EVs). The traditional approach to fast charging entails augmenting the current rate during the CC CV charging process [1]. The aforementioned phenomenon results in a temperature elevation in the battery pack, increasing lithium and SEI layer formation, thereby accelerating the degradation process [2]. Several forms of CC-CV charging, such as MCC and MCC-CV, have demonstrated significantly enhanced charging speeds compared to CC-CV [3], [4]. The application of an NP subsequent CC in a CC-NP-CV protocol has been found to increase lifespan by delaying the process of polarization, as reported in previous studies [5], [6]. The use of the principle of delayed polarization is implemented in both pulsed and trickle charging methodologies, as documented in the literature [7], [8]. Nevertheless, the continuous flow of current through the cell increases the deposition of the SEI layer and accelerates the degradation process, as noted in previous studies [9]. Several alternative charging techniques have been developed, such as CT, CP, and SRC, among others, due to the drawbacks associated with the aforementioned method. The benefits of SRC have been emphasized in the literature [9]; however, the intricate regulation and prompt reaction pose a formidable obstacle to its execution. The operational efficiency of batteries is reduced by the low Coulombic efficiency and low potency of the response exhibited by CP [10], [11].