【正文】 /過放電檢測比較器、過流檢測比較器和負載短路檢測電路 )及邏輯控 制部分。 保護模塊 內蒙古工業(yè)大學畢業(yè)論文外文翻譯 芯片內部保護電路模塊框 圖如圖 3所示。 當電池電壓或電流過低時，充電啟動比較器控制充電。但是 由于 不同的過放電電流對蓄電池的容量和壽命所產(chǎn)生的影響不盡相同，所以對蓄電池的過放電電流檢測也要分別對待。這對于 將蓄電池作為備用電源使用的場合具有重要意義，它既可以保證外部電源給蓄電池供電，又可以在蓄電池過充、過流以及外部電源斷開蓄電池處于過放狀態(tài)時提供保護，將充電和保護功能集于一身使得電路簡化， 并且 減少寶貴的而積資源浪費。 由于 密封免維護鉛酸蓄電池具有密封好、無泄漏、無污染、免維護、價格低廉、供電可靠，在電池的整個壽命期間電壓穩(wěn)定且不需要維護等優(yōu)點，所以在各類需要不間斷供電的電子設備和便攜式儀器儀表中有著廣泛的應用。采用適當?shù)母〕潆妷?，在正常使?(防止過放、過充、過流 )時，免維護 鉛酸蓄電池的浮充壽命可達12~16年，如果浮充電壓偏差 5%則使用壽命縮短 1/2。圖 1是此Ic 在光伏發(fā)電系統(tǒng)中的具體應用，也是此設計的來源。當電池處于過充電 狀態(tài)的時間較長，則會嚴重降低電池的容量，縮短電池的壽命。電器進入涓流充電狀態(tài)，當 驅動 器截止時，該比較器還能輸出 20 mA左右，進入涓流充電電流。該電路包括控制邏輯電路、取樣電路、過充電檢測電路、過放電檢測比較器、過電流檢測比較器、負載短路檢測電路、電平轉換電路和基準電路 (BGR)。 文中主要介紹欠壓檢測電路設計 (圖 5) ，并 給出帶隙基準電路 (圖 6) 。 本 設計電路采用 CSMC μm數(shù)字 CMOS工藝對電路進行仿真分析。 內蒙古工業(yè)大學畢業(yè)論文外文翻譯 Design of a LeadAcid Battery Charging and Protecting IC in Photovoltaic System Solar energy as an inexhaustible, inexhaustible source of energy more and more attention. Solar power has bee popular in many countries and regions, solar lighting has also been put into use in many cities in China. As a key part of the solar lighting, battery charging and protection is particularly important. Sealed maintenancefree leadacid battery has a sealed, leakfree, pollutionfree, maintenancefree, lowcost, reliable power supply during the entire life of the battery voltage is stable and no maintenance, the need for uninterrupted for the various types of has wide application in power electronic equipment, and portable instrumentation. Appropriate float voltage, in normal use (to prevent overdischarge, overcharge, overcurrent), maintenancefree leadacid battery float life of up to 12 ~ 16 years float voltage deviation of 5% shorten the life of 1/2. Thus, the charge has a major impact on this type of battery life. Photovoltaic, battery does not need regular maintenance, the correct charge and reasonable protection, can effectively extend battery life. Charging and protection IC is the separation of the occupied area and the peripheral circuit plexity. Currently, the market has not yet real, charged with the protection function is integrated on a single chip. For this problem, design a set of battery charging and protection functions in one IC is very necessary. design and considerations The system mainly includes two parts: the battery charger module and the protection module. Of great significance for the battery as standby power use of the occasion, It can ensure that the external power supply to the batterypowered, but also in the battery overcharge, overcurrent and an external power supply is disconnected the battery is to put the state to provide protection, the charge and protection rolled into one to make the circuit to simplify and reduce valuable product waste of resources. Figure 1 is a specific application of this Ic in the photovoltaic power 內蒙古工業(yè)大學畢業(yè)論文外文翻譯 generation system, but also the source of this design. Maintenancefree leadacid battery life is usually the cycle life and float life factors affecting the life of the battery charge rate, discharge rate, and float volta ge. Some manufacturers said that if the overcharge protection circuit, the charging rate can be achieved