當蓄(xu)電(dian)(dian)池充(chong)足電(dian)(dian)后，充(chong)電(dian)(dian)機必須適時(shi)地切斷充(chong)電(dian)(dian)電(dian)(dian)流，否則蓄(xu)電(dian)(dian)池將出現大量(liang)出氣、失水(shui)和溫(wen)升(sheng)等(deng)過(guo)充(chong)反應，直接危及蓄(xu)電(dian)(dian)池的使(shi)用壽命。因此，必須隨時(shi)監測蓄(xu)電(dian)(dian)池的充(chong)電(dian)(dian)狀況，保證電(dian)(dian)池充(chong)足電(dian)(dian)而(er)又不過(guo)充(chong)電(dian)(dian)。主要的停充(chong)控(kong)制(zhi)方(fang)法(fa)有：

（1）定(ding)時(shi)(shi)(shi)(shi)控制采用恒流充(chong)(chong)(chong)(chong)(chong)(chong)電(dian)(dian)法(fa)時(shi)(shi)(shi)(shi)，電(dian)(dian)池(chi)所需充(chong)(chong)(chong)(chong)(chong)(chong)電(dian)(dian)時(shi)(shi)(shi)(shi)間可(ke)根(gen)據(ju)電(dian)(dian)池(chi)容量和充(chong)(chong)(chong)(chong)(chong)(chong)電(dian)(dian)電(dian)(dian)流的大小很容易地確(que)定(ding)，因(yin)(yin)此只要預(yu)先設定(ding)好(hao)充(chong)(chong)(chong)(chong)(chong)(chong)電(dian)(dian)時(shi)(shi)(shi)(shi)間，一(yi)旦(dan)時(shi)(shi)(shi)(shi)間一(yi)到，定(ding)時(shi)(shi)(shi)(shi)器(qi)即可(ke)發出信號停充(chong)(chong)(chong)(chong)(chong)(chong)或降為涓流充(chong)(chong)(chong)(chong)(chong)(chong)電(dian)(dian)。定(ding)時(shi)(shi)(shi)(shi)器(qi)可(ke)由時(shi)(shi)(shi)(shi)間繼(ji)電(dian)(dian)器(qi)充(chong)(chong)(chong)(chong)(chong)(chong)當(dang)，或者由單片機承擔其功(gong)能。這(zhe)種方法(fa)簡單，但充(chong)(chong)(chong)(chong)(chong)(chong)電(dian)(dian)時(shi)(shi)(shi)(shi)間不能根(gen)據(ju)電(dian)(dian)池(chi)充(chong)(chong)(chong)(chong)(chong)(chong)電(dian)(dian)前狀態而自(zi)動調(diao)整，因(yin)(yin)此實際充(chong)(chong)(chong)(chong)(chong)(chong)電(dian)(dian)時(shi)(shi)(shi)(shi)，可(ke)能會出現有時(shi)(shi)(shi)(shi)欠充(chong)(chong)(chong)(chong)(chong)(chong)、有時(shi)(shi)(shi)(shi)過充(chong)(chong)(chong)(chong)(chong)(chong)的現象；

（2）電池(chi)溫(wen)(wen)(wen)度(du)控(kong)制對Ni-cd電池(chi)而言(yan)，正(zheng)常充(chong)電時(shi)，蓄(xu)電池(chi)的溫(wen)(wen)(wen)度(du)變化(hua)并不(bu)明(ming)顯，但是(shi)，當電池(chi)過(guo)充(chong)時(shi)，其(qi)內(nei)部氣體壓力將(jiang)迅速增大，負極(ji)板(ban)上氧化(hua)反應(ying)使內(nei)部發(fa)熱，溫(wen)(wen)(wen)度(du)迅速上升（每分鐘可(ke)升高幾個攝氏度(du)）。因此，觀察電池(chi)溫(wen)(wen)(wen)度(du)的變化(hua)，即可(ke)判(pan)斷電池(chi)是(shi)否(fou)已經充(chong)滿(man)。通常采(cai)用(yong)兩只熱敏電阻分別檢(jian)測電池(chi)溫(wen)(wen)(wen)度(du)和(he)環境(jing)溫(wen)(wen)(wen)度(du)，當兩者(zhe)溫(wen)(wen)(wen)差(cha)達到一定(ding)值時(shi)，即發(fa)出停充(chong)信號(hao)。由(you)于(yu)熱敏電阻動態響應(ying)速度(du)較(jiao)慢，故不(bu)能(neng)及(ji)時(shi)準確地檢(jian)測到電池(chi)的滿(man)充(chong)狀態；

（3）電(dian)池(chi)端(duan)電(dian)壓(ya)(ya)(ya)負(fu)(fu)增(zeng)量控(kong)(kong)制(zhi)一般而言，當電(dian)池(chi)充足電(dian)后，其端(duan)電(dian)壓(ya)(ya)(ya)將呈現下降趨勢，據此(ci)可將電(dian)池(chi)電(dian)壓(ya)(ya)(ya)出現負(fu)(fu)增(zeng)長的(de)時刻作為停(ting)充時刻。與溫(wen)度控(kong)(kong)制(zhi)法(fa)相(xiang)比，這(zhe)種方(fang)法(fa)響應(ying)速度快(kuai)，此(ci)外(wai)，電(dian)壓(ya)(ya)(ya)的(de)負(fu)(fu)增(zeng)量與電(dian)壓(ya)(ya)(ya)的(de)絕(jue)對值無關，因此(ci)這(zhe)種停(ting)充控(kong)(kong)制(zhi)方(fang)法(fa)可適應(ying)具(ju)有不(bu)同單格電(dian)池(chi)數的(de)蓄電(dian)池(chi)組充電(dian)。此(ci)方(fang)法(fa)的(de)缺點(dian)是(shi)一般的(de)檢測器(qi)靈敏度和可靠性不(bu)高，同時，當環境(jing)溫(wen)度較高時，電(dian)池(chi)充足電(dian)后電(dian)壓(ya)(ya)(ya)的(de)減小并不(bu)明(ming)顯，因而難(nan)以(yi)控(kong)(kong)制(zhi)。