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)行(xing)(xing)(xing)恒(heng)流快(kuai)速(su)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流可以(yi)(yi)根據蓄電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)的(de)具體容量進(jin)(jin)行(xing)(xing)(xing)設定，本機(ji)(ji)(ji)可以(yi)(yi)輸出20A以(yi)(yi)下的(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流，隨著充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)時(shi)間的(de)推移，蓄電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)的(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)逐漸上升，容量逐漸充(chong)(chong)滿，當蓄電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)達(da)到預定的(de)端電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)時(shi)，充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)進(jin)(jin)入恒(heng)壓(ya)小電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，使蓄電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)的(de)容量進(jin)(jin)一(yi)步充(chong)(chong)滿，而且充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器內(nei)部的(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)比較器輸出指示(shi)信號(hao)，綠色(se)發光二極管點亮，在進(jin)(jin)行(xing)(xing)(xing)一(yi)段時(shi)間充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)后，充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)過程(cheng)可以(yi)(yi)結束，本機(ji)(ji)(ji)可以(yi)(yi)對48伏(fu)以(yi)(yi)下的(de)蓄電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)進(jin)(jin)行(xing)(xing)(xing)快(kuai)速(su)全(quan)自動充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)功率最大可以(yi)(yi)達(da)到600瓦(wa)，充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器的(de)體積為200x180x65毫米，重量約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。
當開始充(chong)電(dian)(dian)(dian)時，蓄電(dian)(dian)(dian)池(chi)的(de)(de)(de)(de)電(dian)(dian)(dian)壓(ya)較低，與充(chong)電(dian)(dian)(dian)機(ji)(ji)(ji)的(de)(de)(de)(de)壓(ya)差較大，初(chu)始充(chong)電(dian)(dian)(dian)電(dian)(dian)(dian)流(liu)(liu)很大，如(ru)果不(bu)加以(yi)限制，可(ke)能會(hui)損(sun)壞蓄電(dian)(dian)(dian)池(chi)和(he)充(chong)電(dian)(dian)(dian)機(ji)(ji)(ji)，所以(yi)本機(ji)(ji)(ji)中由LM358的(de)(de)(de)(de)一(yi)(yi)個運放和(he)電(dian)(dian)(dian)流(liu)(liu)取(qu)樣(yang)(yang)電(dian)(dian)(dian)阻組(zu)成一(yi)(yi)個自動限流(liu)(liu)電(dian)(dian)(dian)路，當充(chong)電(dian)(dian)(dian)電(dian)(dian)(dian)流(liu)(liu)超(chao)過設(she)定的(de)(de)(de)(de)值時（例如(ru)10安培）電(dian)(dian)(dian)流(liu)(liu)取(qu)樣(yang)(yang)電(dian)(dian)(dian)阻上(shang)的(de)(de)(de)(de)壓(ya)降(jiang)使LM358的(de)(de)(de)(de)一(yi)(yi)個運放輸(shu)(shu)出(chu)(chu)(chu)低電(dian)(dian)(dian)平，控制PWM脈(mo)寬控制驅動模(mo)塊(kuai)STK702-015輸(shu)(shu)出(chu)(chu)(chu)的(de)(de)(de)(de)脈(mo)沖寬度變窄，從而輸(shu)(shu)出(chu)(chu)(chu)電(dian)(dian)(dian)壓(ya)降(jiang)低，充(chong)電(dian)(dian)(dian)電(dian)(dian)(dian)流(liu)(liu)減小(xiao)。當蓄電(dian)(dian)(dian)池(chi)充(chong)滿后(hou)（一(yi)(yi)般充(chong)滿后(hou)的(de)(de)(de)(de)蓄電(dian)(dian)(dian)池(chi)電(dian)(dian)(dian)壓(ya)為標稱電(dian)(dian)(dian)壓(ya)的(de)(de)(de)(de)1.3倍(bei)）LM358的(de)(de)(de)(de)另一(yi)(yi)個運放組(zu)成的(de)(de)(de)(de)電(dian)(dian)(dian)壓(ya)比(bi)較器輸(shu)(shu)出(chu)(chu)(chu)低電(dian)(dian)(dian)平，這時綠色發光二極管(guan)點(dian)亮，同時切斷(duan)PWM脈(mo)寬控制驅動模(mo)塊(kuai)的(de)(de)(de)(de)直流(liu)(liu)工作電(dian)(dian)(dian)壓(ya)。表示充(chong)電(dian)(dian)(dian)完(wan)成，此時的(de)(de)(de)(de)充(chong)電(dian)(dian)(dian)機(ji)(ji)(ji)只有輔(fu)助電(dian)(dian)(dian)源供電(dian)(dian)(dian)，功耗很小(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(fang)止在通風較好的(de)地方，便于散熱。