當蓄電(dian)(dian)池(chi)充(chong)(chong)(chong)足(zu)電(dian)(dian)后(hou)，充(chong)(chong)(chong)電(dian)(dian)機必須適(shi)時地切斷充(chong)(chong)(chong)電(dian)(dian)電(dian)(dian)流，否則(ze)蓄電(dian)(dian)池(chi)將(jiang)出現大量(liang)出氣、失水和溫(wen)升等過充(chong)(chong)(chong)反應，直(zhi)接危及蓄電(dian)(dian)池(chi)的(de)使用壽命。因此，必須隨時監測蓄電(dian)(dian)池(chi)的(de)充(chong)(chong)(chong)電(dian)(dian)狀況，保證電(dian)(dian)池(chi)充(chong)(chong)(chong)足(zu)電(dian)(dian)而又不(bu)過充(chong)(chong)(chong)電(dian)(dian)。主要的(de)停充(chong)(chong)(chong)控(kong)制方法有：

（1）定時(shi)(shi)(shi)(shi)控制采用(yong)恒(heng)流(liu)充(chong)(chong)電(dian)(dian)法時(shi)(shi)(shi)(shi)，電(dian)(dian)池(chi)所(suo)需充(chong)(chong)電(dian)(dian)時(shi)(shi)(shi)(shi)間可(ke)(ke)根(gen)據電(dian)(dian)池(chi)容(rong)量和充(chong)(chong)電(dian)(dian)電(dian)(dian)流(liu)的大小(xiao)很(hen)容(rong)易地(di)確定，因此(ci)只要預先設定好充(chong)(chong)電(dian)(dian)時(shi)(shi)(shi)(shi)間，一(yi)旦時(shi)(shi)(shi)(shi)間一(yi)到，定時(shi)(shi)(shi)(shi)器即可(ke)(ke)發出信號(hao)停(ting)充(chong)(chong)或降為涓流(liu)充(chong)(chong)電(dian)(dian)。定時(shi)(shi)(shi)(shi)器可(ke)(ke)由時(shi)(shi)(shi)(shi)間繼電(dian)(dian)器充(chong)(chong)當，或者由單片機(ji)承擔其(qi)功能。這種(zhong)方法簡單，但充(chong)(chong)電(dian)(dian)時(shi)(shi)(shi)(shi)間不能根(gen)據電(dian)(dian)池(chi)充(chong)(chong)電(dian)(dian)前狀態(tai)而自動調整，因此(ci)實際(ji)充(chong)(chong)電(dian)(dian)時(shi)(shi)(shi)(shi)，可(ke)(ke)能會出現(xian)有時(shi)(shi)(shi)(shi)欠(qian)充(chong)(chong)、有時(shi)(shi)(shi)(shi)過充(chong)(chong)的現(xian)象；

（2）電池(chi)溫(wen)(wen)度(du)控(kong)制(zhi)對Ni-cd電池(chi)而言，正常充(chong)(chong)電時，蓄電池(chi)的(de)溫(wen)(wen)度(du)變(bian)化并不明顯(xian)，但是(shi)，當(dang)電池(chi)過充(chong)(chong)時，其內(nei)(nei)部(bu)氣體壓(ya)力將(jiang)迅(xun)速(su)增大，負極板上氧(yang)化反(fan)應(ying)使內(nei)(nei)部(bu)發熱，溫(wen)(wen)度(du)迅(xun)速(su)上升（每分鐘(zhong)可升高幾個(ge)攝(she)氏度(du)）。因此，觀察電池(chi)溫(wen)(wen)度(du)的(de)變(bian)化，即可判斷電池(chi)是(shi)否已經(jing)充(chong)(chong)滿。通(tong)常采用兩(liang)只(zhi)熱敏(min)電阻分別檢測電池(chi)溫(wen)(wen)度(du)和環境(jing)溫(wen)(wen)度(du)，當(dang)兩(liang)者溫(wen)(wen)差達(da)到一定(ding)值(zhi)時，即發出停充(chong)(chong)信(xin)號。由于熱敏(min)電阻動(dong)態(tai)響應(ying)速(su)度(du)較慢，故不能及(ji)時準確地檢測到電池(chi)的(de)滿充(chong)(chong)狀態(tai)；

（3）電(dian)(dian)(dian)池(chi)端電(dian)(dian)(dian)壓負(fu)增量(liang)控(kong)制(zhi)一(yi)般而言，當電(dian)(dian)(dian)池(chi)充足(zu)電(dian)(dian)(dian)后，其端電(dian)(dian)(dian)壓將呈現下降趨勢，據此可將電(dian)(dian)(dian)池(chi)電(dian)(dian)(dian)壓出現負(fu)增長的時(shi)刻作為停(ting)充時(shi)刻。與溫度控(kong)制(zhi)法相比，這種(zhong)方法響應(ying)(ying)速度快，此外，電(dian)(dian)(dian)壓的負(fu)增量(liang)與電(dian)(dian)(dian)壓的絕對(dui)值(zhi)無關，因此這種(zhong)停(ting)充控(kong)制(zhi)方法可適應(ying)(ying)具(ju)有不同(tong)單格(ge)電(dian)(dian)(dian)池(chi)數的蓄電(dian)(dian)(dian)池(chi)組充電(dian)(dian)(dian)。此方法的缺點是(shi)一(yi)般的檢測器靈敏度和(he)可靠性不高，同(tong)時(shi)，當環境溫度較(jiao)高時(shi)，電(dian)(dian)(dian)池(chi)充足(zu)電(dian)(dian)(dian)后電(dian)(dian)(dian)壓的減小并(bing)不明顯，因而難以控(kong)制(zhi)。