基于单片机的智能充电器设计.pdf

基於單片機的鋰電池充電器設計 摘 要 電子技術的快速發展使得各種各樣的電子產品都朝著可攜式和小型輕量化的方向 發展，也使得更多的電氣化產品採用基於電池的供電系統。目前，較多使用的電池有鎳 鎘、鎳氫、鉛蓄電池和鋰電池。它們的各自特點決定了它們將在相當長的時期內共存發 展。由於不同類型電池的充電特性不同，通常對不同類型，甚至不同電壓、容量等級的 電池使用不同的充電器，但這在實際使用中有諸多不便。 本課題設計是一種基於單片機的鋰離子電池充電器，在設計上，選擇了簡潔、高效 的硬體，設計穩定可靠的軟體，詳細說明了系統的硬體組成，包括單片機電路、充電控 制電路、電壓轉換及光耦隔離電路，並對本充電器的核心器件— MAX1898 充電晶片、 AT89C2051 單片機進行了較詳細的介紹。闡述了系統的軟硬體設計。以 C 語言為開發 工具，進行了詳細設計和編碼。實現了系統的可靠性、穩定性、安全性和經濟性。 該智能充電器具有檢測鋰離子電池的狀態； 自動切換充電模式以滿足充電電池的充 電需要；充電器短路保護功能； 充電狀態顯示的功能。 在生活中更好的維護了充電電池， 延長了它的使用壽命。 關鍵字 ：充電器；單片機；鋰電池； MAX1898 Lithium Battery Charger Design Based On Single Chip Abstract Electronic technologys fast development causesvarious electronic products develops toward portable and the small lightweight direction, It also causesthe more electrification products to use based on batterys power supply system. At present, the many uses batteries have the nickel cadmium, the nickel hydrogen, the lead accumulator and the lithium battery. Their respective characteristic had decided they will coexist in a long time develop. Because the different type batterys charge characteristic is different, usually to different type, even different voltage, capacity rank battery use different battery charger, but this has many inconveniences in the actual use. This topic design is one kind lithium ion battery charger which is based on Single Chip, in the design, it has chosen succinctly, the highly effective hardware, the design stable reliable software, explained in detail systems hardware composition, including the monolithic integrated circuit electric circuit, the charge control electric circuit, the voltage transformation and the light pair isolating circuit, and to this battery chargers core co