- 學位論文
智慧型鋰電池電源管理與充電系統
Intelligent Power Management and Charging System for Lithium Battery Pack
摘要
本研究針對由12顆磷酸鋰鐵電池組成之36V/9Ah鋰電池組，設計與製作出一智慧型鋰電池電源管理與充電系統。此系統包含電池管理系統、電源轉換系統與電池充電系統三大部分。電池管理系統之成品為電池保護板，其功能包含：1.鋰電池組過充電及過放電保護、2.電池組殘電量估測、3.具備RS232通訊界面與監控介面、4.具備電池組主動式平衡充電功能、5.具備省電休眠功能。電源轉換系統之成品為電源轉換器，可提供機器人5V、12V、19V等三組電源，分別可提供系統周邊模組、小型伺服馬達、與機器人電腦所需，各組輸出最大可提供5A之輸出電流，且轉換效率在半載時皆可達到85%以上，而滿載時皆可達到90%以上，並且具備輸出短路保護功能。電池充電系統之成品為電池充電器，其內部包含前級功率因數校正與後級數位式LLC半橋串聯諧振轉換器；充電器可接受100-240V寬電壓市電輸入，並提供電池組最大20A的充電電流；其轉換效率在110V輸入時可達到87.8%，而220V輸入時可達到90.6%，並具備輸入欠電壓、輸入過電壓、輸出過電壓、過電流、輸出短路、電池反接與過溫度等保護；充電器可在電池組能量耗盡時於半小時內將電池組容量補充至95%。
並列摘要
In this study, the intelligent lithium battery management and charging system including battery management system, power conversion system and battery charging system is design and achieve for the twelve lithium iron phosphate batteries. The battery management system is the battery protection board, its features including: 1. Battery pack overcharge and over-discharge protection. 2. Battery pack residual estimation. 3. RS232 communication interface and monitoring software. 4. Active cell balancing in battery pack. 5. Low-power sleep mode. The power conversion system is the power converter, it can provide three different output voltages such as 5V for peripheral modules, 12V for servo motors and 19V for notebook computer. All outputs can provide a maximum output current of 5A and its conversion efficiency reaches more than 85% at half load, 90% at full load. It also has the basic protection functions such as the input under-voltage lockout and the output short circuit detection. The battery charging system is the battery charger, it contains with the power factor corrector and the LLC half-bridge series resonant converter. The charger can accepts 100 to 240V wide range ac inputs, and provides a maximum 20A charging current which can charge the battery pack from 0% to 95% within half an hour. Its conversion efficiency reaches more than 87.8% at 110V ac input, and 90.6% at 220V ac input, it also has the complete protection functions such as input under-voltage, input over-voltage, output over-voltage, output over-current, output short circuit, battery pack reverse polarity, and over-temperature protection.