近年來鋰離子電池的應用範圍愈加廣泛，不管是手持式電子產品亦或是電動載具，其大多採用鋰離子電池作為能量儲存裝置，故如何快速對電池充電並兼顧足過放電容量以及安全性為良好充電方法之關鍵。本文以四階段定電流充電法作為鋰離子電池之充電方式，提出利用粒子群最佳化演算法搭配兩個改良機制來搜尋四階段定電流充電法之最佳電流模式，同時紀錄實驗數據並加以分析，進而得出各階段最佳電流值。
本文亦由實驗比較四階段定電流充電法與傳統定電流定電壓充電法之充電時間與放電容量兩種特性，前者以四種不同大小的定電流組合模式對電池進行充電，經實測，雖然其使用較大充電電流能大幅縮短充電時間，但因損失較大而導致可被使用之放電容量較差；反之，較小充電電流則能提升電池放電容量但又拉長整體充電時間，故如何組合出最佳之充電電流模式以達兼具兩者間之優點是重要的。本論文所提出之四階段定電流充電法相對於傳統定電流定電壓充電法，雖然會損失約5%之電池放電容量，但可縮減充電時間約43%。

Nowadays lithium-ion batteries have become more increasingly used in various kinds of applications. Whether they are for handheld consumer electronics or electric vehicles, they all play a critical role in energy storage. Therefore, a well charging method of batteries is important and essential. To be a well charging method that delivers enough discharged capacity within shorter charge time and takes battery safety into account, this thesis applies a four-stage constant current charge (4SCC) method to charge lithium-ion batteries based on a hybrid Taguchi-based Particle Swarm Optimization (PSO) to find out the optimal charge pattern. In addition, experimental data were analyzed in order to obtain the optimal charge current in each stage for the 4SCC charge method.
In addition, this thesis studies the characteristics of charge time and discharge capacity for lithium-ion batteries with the 4SCC charge method as compared to the conventional constant current – constant voltage (CCCV) charge method. Although the charge time will be shorter when charging with the higher charge current based on the experimental results, batteries charged with larger currents may decrease their life. In contrast, smaller charge currents may increase charge time but may increase battery life. Hence, it is important to find the correct charge current pattern to optimize both charge time and battery life. For the proposed 4SCC charge method, it remains 95% of battery usage capacity with a decrease of 43% recharge time when comparing to the CCCV charge method.

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