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(kuai)速充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)，充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)可以(yi)(yi)(yi)根據蓄(xu)(xu)電(dian)(dian)(dian)(dian)(dian)(dian)池(chi)的(de)(de)(de)(de)具(ju)體容(rong)(rong)量(liang)進(jin)行(xing)設定，本機(ji)可以(yi)(yi)(yi)輸出20A以(yi)(yi)(yi)下的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)，隨著(zhu)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)時間(jian)的(de)(de)(de)(de)推移，蓄(xu)(xu)電(dian)(dian)(dian)(dian)(dian)(dian)池(chi)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)壓逐漸(jian)(jian)上升，容(rong)(rong)量(liang)逐漸(jian)(jian)充(chong)(chong)滿(man)，當蓄(xu)(xu)電(dian)(dian)(dian)(dian)(dian)(dian)池(chi)電(dian)(dian)(dian)(dian)(dian)(dian)壓達(da)到預(yu)定的(de)(de)(de)(de)端電(dian)(dian)(dian)(dian)(dian)(dian)壓時，充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)進(jin)入恒壓小電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)，使蓄(xu)(xu)電(dian)(dian)(dian)(dian)(dian)(dian)池(chi)的(de)(de)(de)(de)容(rong)(rong)量(liang)進(jin)一(yi)步充(chong)(chong)滿(man)，而且充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)器(qi)內部(bu)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)壓比較器(qi)輸出指示信號(hao)，綠(lv)色發(fa)光二極管點(dian)亮(liang)，在(zai)進(jin)行(xing)一(yi)段時間(jian)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)后，充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)過程可以(yi)(yi)(yi)結束，本機(ji)可以(yi)(yi)(yi)對(dui)48伏以(yi)(yi)(yi)下的(de)(de)(de)(de)蓄(xu)(xu)電(dian)(dian)(dian)(dian)(dian)(dian)池(chi)進(jin)行(xing)快(kuai)速全自動充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)，充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)功率最大可以(yi)(yi)(yi)達(da)到600瓦，充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)器(qi)的(de)(de)(de)(de)體積為200x180x65毫米，重量(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)開始充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)時(shi)(shi)，蓄電(dian)(dian)(dian)(dian)(dian)(dian)池的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)較低(di)，與充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)的(de)(de)壓(ya)差(cha)較大(da)，初(chu)始充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)流很大(da)，如果不加以限制(zhi)，可能會損壞蓄電(dian)(dian)(dian)(dian)(dian)(dian)池和充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)，所以本機(ji)(ji)中由(you)LM358的(de)(de)一(yi)個(ge)運(yun)(yun)放(fang)和電(dian)(dian)(dian)(dian)(dian)(dian)流取樣(yang)電(dian)(dian)(dian)(dian)(dian)(dian)阻組成一(yi)個(ge)自動(dong)(dong)(dong)限流電(dian)(dian)(dian)(dian)(dian)(dian)路，當(dang)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)流超過設(she)定的(de)(de)值(zhi)時(shi)(shi)（例(li)如10安培）電(dian)(dian)(dian)(dian)(dian)(dian)流取樣(yang)電(dian)(dian)(dian)(dian)(dian)(dian)阻上的(de)(de)壓(ya)降使LM358的(de)(de)一(yi)個(ge)運(yun)(yun)放(fang)輸出(chu)低(di)電(dian)(dian)(dian)(dian)(dian)(dian)平，控制(zhi)PWM脈寬(kuan)控制(zhi)驅動(dong)(dong)(dong)模塊STK702-015輸出(chu)的(de)(de)脈沖寬(kuan)度變窄(zhai)，從(cong)而輸出(chu)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)降低(di)，充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)流減(jian)小。當(dang)蓄電(dian)(dian)(dian)(dian)(dian)(dian)池充(chong)(chong)(chong)滿后(hou)(hou)（一(yi)般充(chong)(chong)(chong)滿后(hou)(hou)的(de)(de)蓄電(dian)(dian)(dian)(dian)(dian)(dian)池電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)為標稱電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)的(de)(de)1.3倍）LM358的(de)(de)另一(yi)個(ge)運(yun)(yun)放(fang)組成的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)比較器輸出(chu)低(di)電(dian)(dian)(dian)(dian)(dian)(dian)平，這時(shi)(shi)綠色(se)發光(guang)二極管(guan)點亮，同(tong)時(shi)(shi)切斷PWM脈寬(kuan)控制(zhi)驅動(dong)(dong)(dong)模塊的(de)(de)直流工作(zuo)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)。表示充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)完成，此時(shi)(shi)的(de)(de)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)只有輔助(zhu)電(dian)(dian)(dian)(dian)(dian)(dian)源供電(dian)(dian)(dian)(dian)(dian)(dian)，功耗很小。

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。充電機(ji)要防止在通風(feng)較好的地(di)方，便于散熱。