當蓄電(dian)(dian)池(chi)(chi)(chi)充(chong)足電(dian)(dian)后(hou)，充(chong)電(dian)(dian)機必須(xu)適時地切(qie)斷充(chong)電(dian)(dian)電(dian)(dian)流，否則蓄電(dian)(dian)池(chi)(chi)(chi)將(jiang)出現大量出氣(qi)、失水和溫升等(deng)過充(chong)反應，直(zhi)接危及蓄電(dian)(dian)池(chi)(chi)(chi)的(de)使用壽命(ming)。因此，必須(xu)隨時監測蓄電(dian)(dian)池(chi)(chi)(chi)的(de)充(chong)電(dian)(dian)狀(zhuang)況，保證電(dian)(dian)池(chi)(chi)(chi)充(chong)足電(dian)(dian)而(er)又(you)不過充(chong)電(dian)(dian)。主(zhu)要的(de)停充(chong)控制方法有：

（1）定時控制(zhi)采用恒流充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)法時，電(dian)(dian)(dian)(dian)池所(suo)需充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)時間(jian)可根(gen)據電(dian)(dian)(dian)(dian)池容量(liang)和(he)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)流的大小(xiao)很容易地確定，因(yin)此只要預先(xian)設(she)定好充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)時間(jian)，一(yi)旦(dan)時間(jian)一(yi)到，定時器(qi)即可發出信號停充(chong)(chong)(chong)或降(jiang)為(wei)涓流充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)。定時器(qi)可由時間(jian)繼電(dian)(dian)(dian)(dian)器(qi)充(chong)(chong)(chong)當，或者由單(dan)片機(ji)承(cheng)擔(dan)其功能(neng)。這種方法簡單(dan)，但充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)時間(jian)不能(neng)根(gen)據電(dian)(dian)(dian)(dian)池充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)前(qian)狀態(tai)而自動調(diao)整，因(yin)此實際充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)時，可能(neng)會出現(xian)有時欠充(chong)(chong)(chong)、有時過充(chong)(chong)(chong)的現(xian)象；

（2）電(dian)(dian)池(chi)(chi)溫(wen)(wen)(wen)度(du)(du)(du)控制對Ni-cd電(dian)(dian)池(chi)(chi)而言，正常充(chong)(chong)電(dian)(dian)時(shi)，蓄(xu)電(dian)(dian)池(chi)(chi)的溫(wen)(wen)(wen)度(du)(du)(du)變化(hua)并不(bu)明(ming)顯(xian)，但是，當(dang)電(dian)(dian)池(chi)(chi)過充(chong)(chong)時(shi)，其內(nei)部(bu)氣體壓力將迅(xun)(xun)速增(zeng)大，負極板上氧化(hua)反(fan)應(ying)使內(nei)部(bu)發熱(re)，溫(wen)(wen)(wen)度(du)(du)(du)迅(xun)(xun)速上升（每分(fen)鐘可升高幾個攝氏度(du)(du)(du)）。因此，觀察電(dian)(dian)池(chi)(chi)溫(wen)(wen)(wen)度(du)(du)(du)的變化(hua)，即可判(pan)斷電(dian)(dian)池(chi)(chi)是否已經充(chong)(chong)滿。通(tong)常采用兩(liang)(liang)只熱(re)敏電(dian)(dian)阻分(fen)別檢(jian)測電(dian)(dian)池(chi)(chi)溫(wen)(wen)(wen)度(du)(du)(du)和環境溫(wen)(wen)(wen)度(du)(du)(du)，當(dang)兩(liang)(liang)者(zhe)溫(wen)(wen)(wen)差達到一定值時(shi)，即發出停充(chong)(chong)信號。由(you)于熱(re)敏電(dian)(dian)阻動態響應(ying)速度(du)(du)(du)較(jiao)慢，故不(bu)能及(ji)時(shi)準確地檢(jian)測到電(dian)(dian)池(chi)(chi)的滿充(chong)(chong)狀態；

（3）電(dian)(dian)池(chi)端(duan)電(dian)(dian)壓(ya)負增量控(kong)制一般而言，當電(dian)(dian)池(chi)充足電(dian)(dian)后，其端(duan)電(dian)(dian)壓(ya)將呈現下(xia)降趨(qu)勢，據此(ci)可(ke)將電(dian)(dian)池(chi)電(dian)(dian)壓(ya)出(chu)現負增長的(de)(de)(de)時刻(ke)作為停充時刻(ke)。與溫度(du)(du)控(kong)制法相比，這種(zhong)方(fang)法響應速度(du)(du)快，此(ci)外，電(dian)(dian)壓(ya)的(de)(de)(de)負增量與電(dian)(dian)壓(ya)的(de)(de)(de)絕對(dui)值無關，因(yin)此(ci)這種(zhong)停充控(kong)制方(fang)法可(ke)適應具有不(bu)同(tong)單(dan)格(ge)電(dian)(dian)池(chi)數的(de)(de)(de)蓄電(dian)(dian)池(chi)組充電(dian)(dian)。此(ci)方(fang)法的(de)(de)(de)缺點(dian)是一般的(de)(de)(de)檢(jian)測(ce)器靈敏度(du)(du)和可(ke)靠性(xing)不(bu)高(gao)，同(tong)時，當環境溫度(du)(du)較高(gao)時，電(dian)(dian)池(chi)充足電(dian)(dian)后電(dian)(dian)壓(ya)的(de)(de)(de)減小并(bing)不(bu)明顯，因(yin)而難(nan)以控(kong)制。