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)(jin)(jin)行恒(heng)流快速充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)，充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流可(ke)以(yi)根(gen)據蓄(xu)(xu)(xu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)的(de)具體容(rong)量(liang)進(jin)(jin)(jin)行設定(ding)(ding)，本機(ji)可(ke)以(yi)輸出(chu)20A以(yi)下的(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流，隨著(zhu)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)時(shi)間的(de)推移，蓄(xu)(xu)(xu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)的(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)逐漸上升，容(rong)量(liang)逐漸充(chong)(chong)(chong)滿，當蓄(xu)(xu)(xu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)達(da)到預定(ding)(ding)的(de)端電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)時(shi)，充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)機(ji)進(jin)(jin)(jin)入恒(heng)壓(ya)小(xiao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)，使蓄(xu)(xu)(xu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)的(de)容(rong)量(liang)進(jin)(jin)(jin)一步充(chong)(chong)(chong)滿，而且充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器內部的(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)比較器輸出(chu)指示信號，綠色發光二極管(guan)點(dian)亮，在進(jin)(jin)(jin)行一段時(shi)間充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)后，充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)過(guo)程可(ke)以(yi)結束，本機(ji)可(ke)以(yi)對48伏以(yi)下的(de)蓄(xu)(xu)(xu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)進(jin)(jin)(jin)行快速全(quan)自(zi)動充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)，充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)功(gong)率最大可(ke)以(yi)達(da)到600瓦，充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器的(de)體積為200x180x65毫米，重量(liang)約1公(gong)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)(chong)(chong)(chong)電(dian)(dian)時(shi)，蓄(xu)電(dian)(dian)池(chi)(chi)的(de)(de)電(dian)(dian)壓(ya)較低(di)(di)，與充(chong)(chong)(chong)(chong)電(dian)(dian)機(ji)(ji)的(de)(de)壓(ya)差較大(da)，初始(shi)充(chong)(chong)(chong)(chong)電(dian)(dian)電(dian)(dian)流(liu)(liu)很(hen)大(da)，如(ru)果(guo)不(bu)加以限(xian)制(zhi)，可能會損壞(huai)蓄(xu)電(dian)(dian)池(chi)(chi)和(he)充(chong)(chong)(chong)(chong)電(dian)(dian)機(ji)(ji)，所以本機(ji)(ji)中由(you)LM358的(de)(de)一(yi)個運(yun)放(fang)和(he)電(dian)(dian)流(liu)(liu)取樣電(dian)(dian)阻組(zu)成(cheng)(cheng)一(yi)個自動限(xian)流(liu)(liu)電(dian)(dian)路，當(dang)充(chong)(chong)(chong)(chong)電(dian)(dian)電(dian)(dian)流(liu)(liu)超過設定的(de)(de)值時(shi)（例(li)如(ru)10安培(pei)）電(dian)(dian)流(liu)(liu)取樣電(dian)(dian)阻上的(de)(de)壓(ya)降使(shi)LM358的(de)(de)一(yi)個運(yun)放(fang)輸出(chu)低(di)(di)電(dian)(dian)平，控制(zhi)PWM脈(mo)寬控制(zhi)驅動模(mo)塊(kuai)STK702-015輸出(chu)的(de)(de)脈(mo)沖寬度(du)變窄，從而輸出(chu)電(dian)(dian)壓(ya)降低(di)(di)，充(chong)(chong)(chong)(chong)電(dian)(dian)電(dian)(dian)流(liu)(liu)減(jian)小。當(dang)蓄(xu)電(dian)(dian)池(chi)(chi)充(chong)(chong)(chong)(chong)滿(man)后(hou)（一(yi)般充(chong)(chong)(chong)(chong)滿(man)后(hou)的(de)(de)蓄(xu)電(dian)(dian)池(chi)(chi)電(dian)(dian)壓(ya)為標稱電(dian)(dian)壓(ya)的(de)(de)1.3倍(bei)）LM358的(de)(de)另(ling)一(yi)個運(yun)放(fang)組(zu)成(cheng)(cheng)的(de)(de)電(dian)(dian)壓(ya)比(bi)較器輸出(chu)低(di)(di)電(dian)(dian)平，這時(shi)綠色發(fa)光二(er)極管點亮，同時(shi)切斷PWM脈(mo)寬控制(zhi)驅動模(mo)塊(kuai)的(de)(de)直流(liu)(liu)工作(zuo)電(dian)(dian)壓(ya)。表示(shi)充(chong)(chong)(chong)(chong)電(dian)(dian)完成(cheng)(cheng)，此時(shi)的(de)(de)充(chong)(chong)(chong)(chong)電(dian)(dian)機(ji)(ji)只有輔助電(dian)(dian)源供電(dian)(dian)，功(gong)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。充電(dian)機要(yao)防止(zhi)在通(tong)風較(jiao)好的地方(fang)，便于散熱(re)。