電動汽車、電動三輪車、高爾夫球車等都采用大容量鉛酸蓄電池組作為動力，大功率充電機可以對大容量的蓄電池組進行快速、安全的全自動充電，充電機采用恒流恒壓的原理對蓄電池進行安全快速充電，在充電開始階段，蓄電池的電壓較低，充電器進(jin)行恒(heng)流(liu)快(kuai)速充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)，充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)流(liu)可(ke)(ke)(ke)以(yi)(yi)根據蓄(xu)電(dian)(dian)(dian)(dian)(dian)池(chi)的(de)(de)(de)具體(ti)容(rong)量(liang)(liang)進(jin)行設定，本機(ji)可(ke)(ke)(ke)以(yi)(yi)輸(shu)出20A以(yi)(yi)下(xia)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)流(liu)，隨著充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)時(shi)間(jian)的(de)(de)(de)推移，蓄(xu)電(dian)(dian)(dian)(dian)(dian)池(chi)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)壓(ya)逐(zhu)漸(jian)上升，容(rong)量(liang)(liang)逐(zhu)漸(jian)充(chong)(chong)滿(man)，當蓄(xu)電(dian)(dian)(dian)(dian)(dian)池(chi)電(dian)(dian)(dian)(dian)(dian)壓(ya)達到(dao)預定的(de)(de)(de)端電(dian)(dian)(dian)(dian)(dian)壓(ya)時(shi)，充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)機(ji)進(jin)入恒(heng)壓(ya)小電(dian)(dian)(dian)(dian)(dian)流(liu)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)，使蓄(xu)電(dian)(dian)(dian)(dian)(dian)池(chi)的(de)(de)(de)容(rong)量(liang)(liang)進(jin)一步充(chong)(chong)滿(man)，而且(qie)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)器(qi)內部的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)壓(ya)比較(jiao)器(qi)輸(shu)出指示(shi)信號，綠色發光(guang)二(er)極管點(dian)亮，在進(jin)行一段(duan)時(shi)間(jian)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)后，充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)過程可(ke)(ke)(ke)以(yi)(yi)結(jie)束，本機(ji)可(ke)(ke)(ke)以(yi)(yi)對48伏以(yi)(yi)下(xia)的(de)(de)(de)蓄(xu)電(dian)(dian)(dian)(dian)(dian)池(chi)進(jin)行快(kuai)速全自動充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)，充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)功(gong)率最大可(ke)(ke)(ke)以(yi)(yi)達到(dao)600瓦(wa)，充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)器(qi)的(de)(de)(de)體(ti)積為200x180x65毫米，重量(liang)(liang)約1公斤。

 STK702-015是一片功能強大的大規模厚膜開關電源電路，內含輔助電源、PWM控制、輸出驅動電路、功率場效應管輸出電路等。它和簡單而且專用的外圍電路一起組成性能可靠的開關穩壓電路。交流電源通過電源濾波器后分成兩路：一路經整流濾波后供給PWM脈寬控制驅動模塊STK702-015的31、32腳，內部PWM開始工作，產生70KHZ的開關信號并驅動功率場效應管作強勁的D類放大后由25、26腳輸出，經過特殊的LC電路推動高頻變壓器工作，經次級降壓后由快恢復二極管MOR3040PT半波整流后輸出，這里沒有濾波電容，這和普通的開關電源有些區別，理論和實踐告訴我們：脈動直流比平滑的直流對蓄電池的充電效果更好，而本機的充電脈沖頻率高達70KHZ，所以充電效果更好，充電速度更快。300伏直流另一路向輔助開關電源供電，輔助電源輸出的直流電壓通過一個開關電路后給PWM脈寬控制驅動模塊提供直流工作電壓。
當(dang)開始(shi)充(chong)電(dian)(dian)(dian)時，蓄(xu)電(dian)(dian)(dian)池(chi)(chi)的電(dian)(dian)(dian)壓(ya)(ya)較(jiao)低，與充(chong)電(dian)(dian)(dian)機的壓(ya)(ya)差較(jiao)大，初始(shi)充(chong)電(dian)(dian)(dian)電(dian)(dian)(dian)流(liu)很(hen)大，如果不(bu)加以(yi)限(xian)制(zhi)(zhi)，可(ke)能會損(sun)壞蓄(xu)電(dian)(dian)(dian)池(chi)(chi)和(he)充(chong)電(dian)(dian)(dian)機，所(suo)以(yi)本機中由LM358的一個(ge)運(yun)放和(he)電(dian)(dian)(dian)流(liu)取樣(yang)(yang)電(dian)(dian)(dian)阻組成一個(ge)自動限(xian)流(liu)電(dian)(dian)(dian)路，當(dang)充(chong)電(dian)(dian)(dian)電(dian)(dian)(dian)流(liu)超過(guo)設定的值(zhi)時（例如10安培）電(dian)(dian)(dian)流(liu)取樣(yang)(yang)電(dian)(dian)(dian)阻上的壓(ya)(ya)降使(shi)LM358的一個(ge)運(yun)放輸出低電(dian)(dian)(dian)平(ping)，控制(zhi)(zhi)PWM脈寬控制(zhi)(zhi)驅(qu)動模塊(kuai)STK702-015輸出的脈沖寬度(du)變(bian)窄，從而輸出電(dian)(dian)(dian)壓(ya)(ya)降低，充(chong)電(dian)(dian)(dian)電(dian)(dian)(dian)流(liu)減(jian)小。當(dang)蓄(xu)電(dian)(dian)(dian)池(chi)(chi)充(chong)滿后(hou)（一般(ban)充(chong)滿后(hou)的蓄(xu)電(dian)(dian)(dian)池(chi)(chi)電(dian)(dian)(dian)壓(ya)(ya)為標稱電(dian)(dian)(dian)壓(ya)(ya)的1.3倍）LM358的另一個(ge)運(yun)放組成的電(dian)(dian)(dian)壓(ya)(ya)比較(jiao)器輸出低電(dian)(dian)(dian)平(ping)，這時綠色發光二極管點亮，同時切斷PWM脈寬控制(zhi)(zhi)驅(qu)動模塊(kuai)的直流(liu)工作電(dian)(dian)(dian)壓(ya)(ya)。表示充(chong)電(dian)(dian)(dian)完成，此時的充(chong)電(dian)(dian)(dian)機只有輔助(zhu)電(dian)(dian)(dian)源供電(dian)(dian)(dian)，功耗很(hen)小。

使用注意事項：

1。充電前先作空載檢查，接通220伏交流電源后，充電器上的紅色和綠色發光二極管均點亮，用萬用表測量一下空載輸出電壓，電壓應為待充電的蓄電池的電壓的1.2～1.3倍左右。
2。充電機輸出的正極接蓄電池的正極，負極接蓄電池的負極，不能接錯
3。充電時，蓄電池接到充電器上后，紅色發光二極管仍然點亮，而綠色發光二極管熄滅，當蓄電池充滿后當紅色和綠色發光二極管均點亮，說明蓄電池充電已經完成，這時可以切斷充電器電源，取下蓄電池。
4。充(chong)電機要防止在(zai)通風較好的地方(fang)，便(bian)于散(san)熱。