鋰離子電池充放電過程之離子遷移模型與模擬

Modeling and Simulation of Ion Immigration in Lithium-Ion Battery during Charging or Discharging

劉孔翔(Kong-Hsiang Liu)

指導教授 ： 林巍聳

國立臺灣大學/電機資訊學院/電機工程學研究所/碩士(2011年)

https://doi.org/10.6342/NTU.2011.00416

摘要

電動車的潛在需求與手持電子裝置的廣泛使用，使鋰離子電池新技術與新材料的研發變得很迫切，而鋰離子電池的電腦模擬系統可以快速觀察新設計或新材料的效果，可以明顯的提升研究工作的效率，縮短產品的研發時程。本論文針對鋰離子電池在充放電程序中，鋰離子在正電極板固態粒子、電解液、穿透膜、負電極板固態粒子等媒介之間的遷移過程，進行建模並設計電腦模擬程式。此模型與模擬程式可應用於協助發展快速充電技術、電能等化技術、殘電量估測技術、電池生命期的估測技術等。本論文所建立的鋰離子電池電化學模型模擬程式，可以清楚描述電池內部各個位置的鋰離子濃度和電位的變動，設定標準型鈷酸鋰離子電池的模型參數後，所產生的模擬數據與標準型鈷酸鋰離子電池取得的實驗數據頗為吻合，驗證了電池模型的正確性與模擬程式的可用性，最後將鋰離子電池的模擬程式應用於估測鋰離子電池的殘電量，以展示電池模型與模擬程式的功用。

關鍵字

鋰離子電池 ； 電化學模型 ； 殘電量 ； 離子遷移

並列摘要

Electric vehicles and hand-held electronic devices have urgent demand for new technologies and new materials on Lithium-ion battery to provide more energy density and more power density. Modeling Lithium-ion battery to build a battery simulation system can assist the research works on developing the relevant technologies. Based on an electrochemical model of Lithium-ion battery cell, this thesis develops a battery simulation system to investigate the process of moving Lithium ions from the cathode via the electrolyte though the separator till reaching the anode. The battery simulation system enables examining local potential and ion concentration during charging or discharging. Researches on the fast charging, cell equalization, state-of-charge estimation, and state-of-health estimation may acquire variables from the battery simulation system to test the methods. Dedicating the model parameters and boundary conditions to a commercially available Lithium-Cobalt battery, the simulation results are confirmed with the test results of the battery. Applying to estimate the State of Charge (SoC) of the test battery, the battery simulation system is shown useful in assisting research works.

並列關鍵字

Li-ion battery ； electrochemical model ； state-of-charge ； battery simulation

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