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(xing)恒流(liu)快速充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)，充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)流(liu)可以(yi)(yi)(yi)根據蓄(xu)電(dian)(dian)(dian)(dian)(dian)池的(de)(de)(de)具體(ti)容量(liang)(liang)進(jin)行(xing)設定(ding)(ding)，本機可以(yi)(yi)(yi)輸出20A以(yi)(yi)(yi)下的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)流(liu)，隨(sui)著(zhu)充(chong)(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)池的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)壓逐漸上升，容量(liang)(liang)逐漸充(chong)(chong)(chong)滿(man)，當蓄(xu)電(dian)(dian)(dian)(dian)(dian)池電(dian)(dian)(dian)(dian)(dian)壓達到(dao)(dao)預定(ding)(ding)的(de)(de)(de)端(duan)電(dian)(dian)(dian)(dian)(dian)壓時(shi)，充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)機進(jin)入恒壓小(xiao)電(dian)(dian)(dian)(dian)(dian)流(liu)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)，使蓄(xu)電(dian)(dian)(dian)(dian)(dian)池的(de)(de)(de)容量(liang)(liang)進(jin)一步充(chong)(chong)(chong)滿(man)，而(er)且充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)器內部的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)壓比較器輸出指示信號(hao)，綠色發光二(er)極管點亮，在進(jin)行(xing)一段(duan)時(shi)間(jian)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)后，充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)過程可以(yi)(yi)(yi)結束，本機可以(yi)(yi)(yi)對48伏(fu)以(yi)(yi)(yi)下的(de)(de)(de)蓄(xu)電(dian)(dian)(dian)(dian)(dian)池進(jin)行(xing)快速全自動充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)，充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)功(gong)率最大可以(yi)(yi)(yi)達到(dao)(dao)600瓦，充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)器的(de)(de)(de)體(ti)積為200x180x65毫米，重量(liang)(liang)約(yue)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。
當開(kai)始(shi)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)時(shi)，蓄(xu)電(dian)(dian)(dian)(dian)(dian)池(chi)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)較(jiao)低(di)，與充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)機的(de)(de)(de)壓(ya)(ya)(ya)差(cha)較(jiao)大(da)，初始(shi)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)很大(da)，如果(guo)不加(jia)以(yi)限制(zhi)，可能會(hui)損壞蓄(xu)電(dian)(dian)(dian)(dian)(dian)池(chi)和(he)(he)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)機，所以(yi)本機中由(you)LM358的(de)(de)(de)一個(ge)(ge)運放(fang)和(he)(he)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)取樣電(dian)(dian)(dian)(dian)(dian)阻(zu)組(zu)成(cheng)一個(ge)(ge)自動(dong)限流(liu)(liu)電(dian)(dian)(dian)(dian)(dian)路，當充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)超過設定的(de)(de)(de)值時(shi)（例如10安培）電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)取樣電(dian)(dian)(dian)(dian)(dian)阻(zu)上的(de)(de)(de)壓(ya)(ya)(ya)降使LM358的(de)(de)(de)一個(ge)(ge)運放(fang)輸(shu)出低(di)電(dian)(dian)(dian)(dian)(dian)平(ping)，控(kong)制(zhi)PWM脈寬(kuan)控(kong)制(zhi)驅(qu)動(dong)模(mo)(mo)塊STK702-015輸(shu)出的(de)(de)(de)脈沖(chong)寬(kuan)度(du)變窄，從而輸(shu)出電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)降低(di)，充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)減小(xiao)。當蓄(xu)電(dian)(dian)(dian)(dian)(dian)池(chi)充(chong)(chong)滿(man)后（一般(ban)充(chong)(chong)滿(man)后的(de)(de)(de)蓄(xu)電(dian)(dian)(dian)(dian)(dian)池(chi)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)為標(biao)稱電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)的(de)(de)(de)1.3倍）LM358的(de)(de)(de)另一個(ge)(ge)運放(fang)組(zu)成(cheng)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)比較(jiao)器(qi)輸(shu)出低(di)電(dian)(dian)(dian)(dian)(dian)平(ping)，這時(shi)綠色發光二極管點(dian)亮(liang)，同時(shi)切斷PWM脈寬(kuan)控(kong)制(zhi)驅(qu)動(dong)模(mo)(mo)塊的(de)(de)(de)直流(liu)(liu)工作電(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)。表示充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)完成(cheng)，此(ci)時(shi)的(de)(de)(de)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)機只有(you)輔(fu)助電(dian)(dian)(dian)(dian)(dian)源(yuan)供電(dian)(dian)(dian)(dian)(dian)，功耗(hao)很小(xiao)。

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。充電機(ji)要防止在(zai)通風(feng)較好的(de)地方，便(bian)于散熱。