以DSP實現之鋰離子電池快速充電器的研製

Design and Implementation of DSP-Based Fast Charger for Li-ion Battery

田振浤(Chen-Hung Tien)

指導教授 ： 歐勝源

國立臺北科技大學/電資學院/電力電子產業研發碩士專班/碩士(2010年)

摘要

本論文提出一全數位化控制之鋰離子電池快速充電器，電路架構採用降壓型直流/直流轉換器，其中具有電池充放電之閉迴路控制電流迴路與電壓迴路，並使用德州儀器之DSP TMS320F2812為控制平台，藉由設計數位化控制器實現包含有定電流與定電壓充電樣態之快速充電法則。電路設計規格為輸入為直流電壓9V，定電流輸出為1A，輸出電壓範圍為3V~5V。
本論文選用容量大、充電電壓範圍大、不具記憶效應的鋰離子電池當作充電電池。充電法選用Motorola快速充電法，充電週期包括充電時間，並加入休息和放電時間加速電池化學反應，讓可充電電流變大，充電時間縮短。充電時間在50分鐘內，充電溫度變化在1.1oC之內，充電效率為85.71%。以上結果驗證實驗和設計之正確性。

關鍵字

數位訊號處理器 ； Motorola快速充電法 ； 鋰離子電池

並列摘要

The main theme of this thesis presents a fully-digital controlled fast charger for Li-ion battery. The DC/DC buck converter is used as the charger circuit and a DSP TMS320F2812 by Texas Instruments is adopted to control current and voltage closed loops. By designing the digital controller, the fast charging method is achieved, including the charging pattern comprised of CC mode and CV mode. The specifications are as follows: input voltage is 9V, output constant current is 1A, and output voltage is from 3V to 5V.
The Li-ion battery is used as the secondary battery because of its advantages including high energy density, high operation voltage and no memory effect. Motorola charging method is utilized to implement the fast charging functionality in which a charging period includes the charging time, the rest time and the discharging time. The rest time and the discharging time can speed up the chemical reaction to increase the endurable charging current and shorten the charging time. The charging time is within 50 mins in experiment, the increase in charging temperature is within 1.1oC, and the charging efficiency is up to 87.51%. Experimental results confirm the accuracy of the design and the implementation.

並列關鍵字

Digital signal Processor (DSP) ； Motorola charging method ； Li-ion battery

參考文獻

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