當(dang)蓄(xu)(xu)電(dian)(dian)(dian)池(chi)充(chong)(chong)足(zu)電(dian)(dian)(dian)后，充(chong)(chong)電(dian)(dian)(dian)機必(bi)須適時(shi)地(di)切斷充(chong)(chong)電(dian)(dian)(dian)電(dian)(dian)(dian)流，否則蓄(xu)(xu)電(dian)(dian)(dian)池(chi)將出(chu)現大量出(chu)氣、失水(shui)和溫升等過充(chong)(chong)反應，直接危及蓄(xu)(xu)電(dian)(dian)(dian)池(chi)的(de)使用壽命。因此，必(bi)須隨時(shi)監測蓄(xu)(xu)電(dian)(dian)(dian)池(chi)的(de)充(chong)(chong)電(dian)(dian)(dian)狀況(kuang)，保證電(dian)(dian)(dian)池(chi)充(chong)(chong)足(zu)電(dian)(dian)(dian)而又不過充(chong)(chong)電(dian)(dian)(dian)。主(zhu)要的(de)停充(chong)(chong)控制方法有(you)：

（1）定(ding)時控制(zhi)采用恒(heng)流充(chong)電(dian)(dian)(dian)(dian)(dian)法時，電(dian)(dian)(dian)(dian)(dian)池(chi)所需充(chong)電(dian)(dian)(dian)(dian)(dian)時間可(ke)根據電(dian)(dian)(dian)(dian)(dian)池(chi)容量和充(chong)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)流的大小很容易地確定(ding)，因此只要預(yu)先(xian)設定(ding)好充(chong)電(dian)(dian)(dian)(dian)(dian)時間，一旦時間一到，定(ding)時器(qi)即可(ke)發出信號停(ting)充(chong)或降為涓流充(chong)電(dian)(dian)(dian)(dian)(dian)。定(ding)時器(qi)可(ke)由時間繼電(dian)(dian)(dian)(dian)(dian)器(qi)充(chong)當(dang)，或者由單片機承(cheng)擔其功能。這種方法簡(jian)單，但(dan)充(chong)電(dian)(dian)(dian)(dian)(dian)時間不能根據電(dian)(dian)(dian)(dian)(dian)池(chi)充(chong)電(dian)(dian)(dian)(dian)(dian)前狀態(tai)而(er)自(zi)動調(diao)整，因此實際充(chong)電(dian)(dian)(dian)(dian)(dian)時，可(ke)能會出現有時欠充(chong)、有時過充(chong)的現象(xiang)；

（2）電(dian)(dian)池(chi)(chi)溫(wen)度(du)(du)控制(zhi)對Ni-cd電(dian)(dian)池(chi)(chi)而言，正(zheng)常充電(dian)(dian)時(shi)，蓄電(dian)(dian)池(chi)(chi)的(de)溫(wen)度(du)(du)變(bian)化(hua)(hua)并(bing)不明顯，但(dan)是(shi)，當電(dian)(dian)池(chi)(chi)過充時(shi)，其內(nei)部氣體(ti)壓力(li)將(jiang)迅(xun)速(su)增大，負極(ji)板上氧化(hua)(hua)反應(ying)使內(nei)部發(fa)熱(re)，溫(wen)度(du)(du)迅(xun)速(su)上升(sheng)(sheng)（每(mei)分鐘可升(sheng)(sheng)高幾個攝氏度(du)(du)）。因(yin)此，觀察電(dian)(dian)池(chi)(chi)溫(wen)度(du)(du)的(de)變(bian)化(hua)(hua)，即可判(pan)斷電(dian)(dian)池(chi)(chi)是(shi)否已經充滿。通常采用兩只熱(re)敏電(dian)(dian)阻分別檢(jian)測電(dian)(dian)池(chi)(chi)溫(wen)度(du)(du)和(he)環境溫(wen)度(du)(du)，當兩者溫(wen)差達到一定(ding)值時(shi)，即發(fa)出(chu)停充信號。由于熱(re)敏電(dian)(dian)阻動態(tai)響(xiang)應(ying)速(su)度(du)(du)較慢，故不能(neng)及時(shi)準確地檢(jian)測到電(dian)(dian)池(chi)(chi)的(de)滿充狀態(tai)；

（3）電(dian)(dian)池(chi)(chi)端電(dian)(dian)壓(ya)(ya)(ya)負(fu)增(zeng)量控(kong)制(zhi)一般而(er)言，當電(dian)(dian)池(chi)(chi)充(chong)(chong)(chong)足電(dian)(dian)后(hou)，其端電(dian)(dian)壓(ya)(ya)(ya)將(jiang)呈現(xian)下降趨勢(shi)，據(ju)此(ci)可(ke)將(jiang)電(dian)(dian)池(chi)(chi)電(dian)(dian)壓(ya)(ya)(ya)出現(xian)負(fu)增(zeng)長的(de)時(shi)刻作為停充(chong)(chong)(chong)時(shi)刻。與溫度(du)控(kong)制(zhi)法(fa)(fa)相比，這種方(fang)法(fa)(fa)響應速度(du)快(kuai)，此(ci)外，電(dian)(dian)壓(ya)(ya)(ya)的(de)負(fu)增(zeng)量與電(dian)(dian)壓(ya)(ya)(ya)的(de)絕對值無關，因此(ci)這種停充(chong)(chong)(chong)控(kong)制(zhi)方(fang)法(fa)(fa)可(ke)適應具有不同單格電(dian)(dian)池(chi)(chi)數的(de)蓄電(dian)(dian)池(chi)(chi)組充(chong)(chong)(chong)電(dian)(dian)。此(ci)方(fang)法(fa)(fa)的(de)缺(que)點是一般的(de)檢測(ce)器靈敏度(du)和可(ke)靠性(xing)不高，同時(shi)，當環(huan)境溫度(du)較高時(shi)，電(dian)(dian)池(chi)(chi)充(chong)(chong)(chong)足電(dian)(dian)后(hou)電(dian)(dian)壓(ya)(ya)(ya)的(de)減小(xiao)并不明顯，因而(er)難(nan)以控(kong)制(zhi)。