當蓄(xu)(xu)電(dian)(dian)池充(chong)足電(dian)(dian)后，充(chong)電(dian)(dian)機必須(xu)適時(shi)地切斷充(chong)電(dian)(dian)電(dian)(dian)流，否則蓄(xu)(xu)電(dian)(dian)池將出現(xian)大(da)量(liang)出氣、失(shi)水和溫(wen)升(sheng)等過充(chong)反應，直接危及蓄(xu)(xu)電(dian)(dian)池的(de)使(shi)用壽命。因(yin)此，必須(xu)隨時(shi)監測蓄(xu)(xu)電(dian)(dian)池的(de)充(chong)電(dian)(dian)狀況，保證電(dian)(dian)池充(chong)足電(dian)(dian)而(er)又不過充(chong)電(dian)(dian)。主(zhu)要的(de)停充(chong)控制方法(fa)有：

（1）定時(shi)控(kong)制采用恒流充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)法(fa)時(shi)，電(dian)(dian)(dian)(dian)池所(suo)需(xu)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)時(shi)間(jian)可根(gen)據電(dian)(dian)(dian)(dian)池容量和充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)流的大小很容易地(di)確定，因(yin)此只要預先設定好充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)時(shi)間(jian)，一(yi)旦(dan)時(shi)間(jian)一(yi)到，定時(shi)器即可發出信號停(ting)充(chong)(chong)(chong)或降(jiang)為涓流充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)。定時(shi)器可由(you)時(shi)間(jian)繼電(dian)(dian)(dian)(dian)器充(chong)(chong)(chong)當，或者由(you)單(dan)片機承擔其功(gong)能(neng)。這種方法(fa)簡單(dan)，但充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)時(shi)間(jian)不能(neng)根(gen)據電(dian)(dian)(dian)(dian)池充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)前狀(zhuang)態而自動調整，因(yin)此實際充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)時(shi)，可能(neng)會(hui)出現有時(shi)欠充(chong)(chong)(chong)、有時(shi)過(guo)充(chong)(chong)(chong)的現象；

（2）電(dian)(dian)(dian)池溫(wen)度(du)控(kong)制(zhi)對(dui)Ni-cd電(dian)(dian)(dian)池而言，正常充(chong)電(dian)(dian)(dian)時(shi)，蓄電(dian)(dian)(dian)池的(de)(de)(de)溫(wen)度(du)變(bian)(bian)化并不(bu)(bu)明顯(xian)，但(dan)是(shi)(shi)，當(dang)電(dian)(dian)(dian)池過充(chong)時(shi)，其內部氣體壓(ya)力將(jiang)迅速(su)增大，負極(ji)板上氧(yang)化反(fan)應使內部發熱，溫(wen)度(du)迅速(su)上升（每分鐘可(ke)升高幾個攝(she)氏(shi)度(du)）。因此，觀察(cha)電(dian)(dian)(dian)池溫(wen)度(du)的(de)(de)(de)變(bian)(bian)化，即(ji)可(ke)判斷(duan)電(dian)(dian)(dian)池是(shi)(shi)否已經充(chong)滿。通常采用兩只(zhi)熱敏電(dian)(dian)(dian)阻(zu)分別(bie)檢(jian)測電(dian)(dian)(dian)池溫(wen)度(du)和(he)環境溫(wen)度(du)，當(dang)兩者溫(wen)差達到一定值時(shi)，即(ji)發出停充(chong)信號。由于熱敏電(dian)(dian)(dian)阻(zu)動態響應速(su)度(du)較慢，故(gu)不(bu)(bu)能及時(shi)準確地(di)檢(jian)測到電(dian)(dian)(dian)池的(de)(de)(de)滿充(chong)狀態；

（3）電(dian)(dian)(dian)(dian)池(chi)端(duan)電(dian)(dian)(dian)(dian)壓(ya)(ya)負增(zeng)(zeng)量控(kong)(kong)(kong)制(zhi)一(yi)般而言(yan)，當電(dian)(dian)(dian)(dian)池(chi)充(chong)(chong)(chong)足電(dian)(dian)(dian)(dian)后(hou)，其端(duan)電(dian)(dian)(dian)(dian)壓(ya)(ya)將呈現下降趨勢(shi)，據此可將電(dian)(dian)(dian)(dian)池(chi)電(dian)(dian)(dian)(dian)壓(ya)(ya)出現負增(zeng)(zeng)長(chang)的(de)時(shi)刻(ke)作為(wei)停充(chong)(chong)(chong)時(shi)刻(ke)。與溫(wen)度(du)控(kong)(kong)(kong)制(zhi)法相比，這種(zhong)方法響應(ying)速度(du)快，此外，電(dian)(dian)(dian)(dian)壓(ya)(ya)的(de)負增(zeng)(zeng)量與電(dian)(dian)(dian)(dian)壓(ya)(ya)的(de)絕(jue)對值無關，因此這種(zhong)停充(chong)(chong)(chong)控(kong)(kong)(kong)制(zhi)方法可適(shi)應(ying)具有不同單格(ge)電(dian)(dian)(dian)(dian)池(chi)數的(de)蓄電(dian)(dian)(dian)(dian)池(chi)組充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)。此方法的(de)缺(que)點是一(yi)般的(de)檢測(ce)器靈敏度(du)和(he)可靠性不高，同時(shi)，當環境溫(wen)度(du)較高時(shi)，電(dian)(dian)(dian)(dian)池(chi)充(chong)(chong)(chong)足電(dian)(dian)(dian)(dian)后(hou)電(dian)(dian)(dian)(dian)壓(ya)(ya)的(de)減小并不明(ming)顯，因而難(nan)以控(kong)(kong)(kong)制(zhi)。