當蓄(xu)電(dian)(dian)(dian)(dian)池充(chong)足電(dian)(dian)(dian)(dian)后(hou)，充(chong)電(dian)(dian)(dian)(dian)機必(bi)須適(shi)時地切斷充(chong)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)流，否則(ze)蓄(xu)電(dian)(dian)(dian)(dian)池將出現大量出氣(qi)、失水和溫升等過充(chong)反應，直接危及蓄(xu)電(dian)(dian)(dian)(dian)池的(de)使(shi)用壽命。因此，必(bi)須隨時監測蓄(xu)電(dian)(dian)(dian)(dian)池的(de)充(chong)電(dian)(dian)(dian)(dian)狀況(kuang)，保證電(dian)(dian)(dian)(dian)池充(chong)足電(dian)(dian)(dian)(dian)而又(you)不過充(chong)電(dian)(dian)(dian)(dian)。主要的(de)停(ting)充(chong)控制(zhi)方(fang)法(fa)有(you)：

（1）定時(shi)(shi)(shi)(shi)控制采用恒流充(chong)電法(fa)時(shi)(shi)(shi)(shi)，電池所需充(chong)電時(shi)(shi)(shi)(shi)間(jian)可(ke)根(gen)據(ju)電池容(rong)量(liang)和(he)充(chong)電電流的大小很容(rong)易(yi)地確定，因此(ci)只要預先設定好(hao)充(chong)電時(shi)(shi)(shi)(shi)間(jian)，一旦時(shi)(shi)(shi)(shi)間(jian)一到，定時(shi)(shi)(shi)(shi)器即可(ke)發出信號停(ting)充(chong)或(huo)降為涓流充(chong)電。定時(shi)(shi)(shi)(shi)器可(ke)由時(shi)(shi)(shi)(shi)間(jian)繼電器充(chong)當，或(huo)者由單片(pian)機承(cheng)擔其(qi)功能(neng)。這種方法(fa)簡單，但充(chong)電時(shi)(shi)(shi)(shi)間(jian)不能(neng)根(gen)據(ju)電池充(chong)電前狀態而自動調(diao)整(zheng)，因此(ci)實(shi)際充(chong)電時(shi)(shi)(shi)(shi)，可(ke)能(neng)會出現(xian)有時(shi)(shi)(shi)(shi)欠充(chong)、有時(shi)(shi)(shi)(shi)過(guo)充(chong)的現(xian)象；

（2）電池(chi)溫(wen)度控(kong)制對Ni-cd電池(chi)而(er)言(yan)，正常充(chong)(chong)電時，蓄電池(chi)的(de)溫(wen)度變化(hua)(hua)并不(bu)明(ming)顯，但(dan)是，當(dang)電池(chi)過充(chong)(chong)時，其內部(bu)氣體(ti)壓力將迅速增大，負極板上氧化(hua)(hua)反應使內部(bu)發(fa)熱，溫(wen)度迅速上升(sheng)（每分鐘可(ke)升(sheng)高幾個攝氏度）。因此，觀察電池(chi)溫(wen)度的(de)變化(hua)(hua)，即(ji)可(ke)判斷電池(chi)是否已(yi)經充(chong)(chong)滿。通常采用(yong)兩只熱敏電阻(zu)分別檢(jian)測電池(chi)溫(wen)度和環境溫(wen)度，當(dang)兩者溫(wen)差達到一定(ding)值時，即(ji)發(fa)出停充(chong)(chong)信號(hao)。由于熱敏電阻(zu)動態響應速度較慢，故不(bu)能及時準確地檢(jian)測到電池(chi)的(de)滿充(chong)(chong)狀態；

（3）電(dian)(dian)池(chi)(chi)端電(dian)(dian)壓負增量控(kong)制(zhi)一(yi)般而言，當(dang)電(dian)(dian)池(chi)(chi)充足(zu)電(dian)(dian)后，其端電(dian)(dian)壓將呈現下降趨(qu)勢(shi)，據此可將電(dian)(dian)池(chi)(chi)電(dian)(dian)壓出現負增長的時(shi)(shi)刻作為(wei)停(ting)充時(shi)(shi)刻。與溫度(du)控(kong)制(zhi)法(fa)相比，這種方法(fa)響應速(su)度(du)快，此外，電(dian)(dian)壓的負增量與電(dian)(dian)壓的絕對值(zhi)無關，因(yin)此這種停(ting)充控(kong)制(zhi)方法(fa)可適應具有不同單格電(dian)(dian)池(chi)(chi)數的蓄電(dian)(dian)池(chi)(chi)組充電(dian)(dian)。此方法(fa)的缺點是(shi)一(yi)般的檢測器靈敏(min)度(du)和(he)可靠(kao)性不高(gao)，同時(shi)(shi)，當(dang)環(huan)境溫度(du)較高(gao)時(shi)(shi)，電(dian)(dian)池(chi)(chi)充足(zu)電(dian)(dian)后電(dian)(dian)壓的減小(xiao)并不明(ming)顯，因(yin)而難以控(kong)制(zhi)。