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)恒流快速(su)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)，充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流可(ke)(ke)以(yi)根據蓄電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)的(de)(de)具(ju)體容量(liang)進(jin)(jin)行(xing)設定(ding)(ding)，本機可(ke)(ke)以(yi)輸出(chu)20A以(yi)下的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流，隨(sui)著充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)時(shi)間(jian)的(de)(de)推移，蓄電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)逐漸上升，容量(liang)逐漸充(chong)(chong)滿，當蓄電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)達(da)(da)到(dao)預定(ding)(ding)的(de)(de)端電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)時(shi)，充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)機進(jin)(jin)入恒壓(ya)(ya)小電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)，使蓄電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)的(de)(de)容量(liang)進(jin)(jin)一步(bu)充(chong)(chong)滿，而且(qie)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)內部(bu)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)比較器(qi)(qi)輸出(chu)指示信號，綠色(se)發(fa)光二極管點亮，在進(jin)(jin)行(xing)一段時(shi)間(jian)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)后，充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)過(guo)程可(ke)(ke)以(yi)結束，本機可(ke)(ke)以(yi)對48伏以(yi)下的(de)(de)蓄電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)進(jin)(jin)行(xing)快速(su)全自動充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)，充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)功率最大可(ke)(ke)以(yi)達(da)(da)到(dao)600瓦，充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)的(de)(de)體積為200x180x65毫米，重(zhong)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。
當開始充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)時(shi)，蓄(xu)(xu)(xu)電(dian)(dian)(dian)(dian)(dian)池的(de)電(dian)(dian)(dian)(dian)(dian)壓(ya)較低，與充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)機(ji)的(de)壓(ya)差較大，初(chu)始充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)流(liu)很(hen)大，如果不加以限制(zhi)，可(ke)能會(hui)損(sun)壞蓄(xu)(xu)(xu)電(dian)(dian)(dian)(dian)(dian)池和充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)機(ji)，所以本機(ji)中由LM358的(de)一(yi)(yi)(yi)個(ge)(ge)運(yun)放(fang)和電(dian)(dian)(dian)(dian)(dian)流(liu)取(qu)樣電(dian)(dian)(dian)(dian)(dian)阻(zu)組(zu)成(cheng)一(yi)(yi)(yi)個(ge)(ge)自(zi)動限流(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)超過設定的(de)值時(shi)（例如10安(an)培）電(dian)(dian)(dian)(dian)(dian)流(liu)取(qu)樣電(dian)(dian)(dian)(dian)(dian)阻(zu)上(shang)的(de)壓(ya)降使LM358的(de)一(yi)(yi)(yi)個(ge)(ge)運(yun)放(fang)輸出(chu)(chu)(chu)低電(dian)(dian)(dian)(dian)(dian)平，控制(zhi)PWM脈寬控制(zhi)驅(qu)動模(mo)塊STK702-015輸出(chu)(chu)(chu)的(de)脈沖寬度變(bian)窄，從而(er)輸出(chu)(chu)(chu)電(dian)(dian)(dian)(dian)(dian)壓(ya)降低，充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)流(liu)減小。當蓄(xu)(xu)(xu)電(dian)(dian)(dian)(dian)(dian)池充(chong)(chong)滿后（一(yi)(yi)(yi)般(ban)充(chong)(chong)滿后的(de)蓄(xu)(xu)(xu)電(dian)(dian)(dian)(dian)(dian)池電(dian)(dian)(dian)(dian)(dian)壓(ya)為標稱電(dian)(dian)(dian)(dian)(dian)壓(ya)的(de)1.3倍）LM358的(de)另一(yi)(yi)(yi)個(ge)(ge)運(yun)放(fang)組(zu)成(cheng)的(de)電(dian)(dian)(dian)(dian)(dian)壓(ya)比較器輸出(chu)(chu)(chu)低電(dian)(dian)(dian)(dian)(dian)平，這時(shi)綠色發光(guang)二(er)極管點亮，同時(shi)切(qie)斷PWM脈寬控制(zhi)驅(qu)動模(mo)塊的(de)直流(liu)工(gong)作電(dian)(dian)(dian)(dian)(dian)壓(ya)。表示充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)完成(cheng)，此時(shi)的(de)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)機(ji)只有輔助(zhu)電(dian)(dian)(dian)(dian)(dian)源供電(dian)(dian)(dian)(dian)(dian)，功耗(hao)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。充電機要防止在(zai)通風較好的(de)地方，便于(yu)散(san)熱。