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處理蓄電池充電機突然停電的方法

2019/4/18 14:37:44??????點擊:
當蓄(xu)(xu)電(dian)(dian)池(chi)充(chong)(chong)(chong)足(zu)電(dian)(dian)后,充(chong)(chong)(chong)電(dian)(dian)機(ji)必(bi)須(xu)適時地(di)切斷充(chong)(chong)(chong)電(dian)(dian)電(dian)(dian)流,否則(ze)蓄(xu)(xu)電(dian)(dian)池(chi)將出(chu)(chu)現大量出(chu)(chu)氣(qi)、失水和溫升(sheng)等過充(chong)(chong)(chong)反應,直接危及蓄(xu)(xu)電(dian)(dian)池(chi)的使用壽命。因此,必(bi)須(xu)隨時監測蓄(xu)(xu)電(dian)(dian)池(chi)的充(chong)(chong)(chong)電(dian)(dian)狀況,保證電(dian)(dian)池(chi)充(chong)(chong)(chong)足(zu)電(dian)(dian)而又不過充(chong)(chong)(chong)電(dian)(dian)。主(zhu)要的停充(chong)(chong)(chong)控(kong)制方法(fa)有:
(1)定(ding)(ding)時(shi)控制采用恒流(liu)充(chong)(chong)電(dian)(dian)法時(shi),電(dian)(dian)池所需充(chong)(chong)電(dian)(dian)時(shi)間(jian)可根據(ju)電(dian)(dian)池容量和(he)充(chong)(chong)電(dian)(dian)電(dian)(dian)流(liu)的(de)大小很(hen)容易地確定(ding)(ding),因(yin)此(ci)只(zhi)要預(yu)先(xian)設(she)定(ding)(ding)好充(chong)(chong)電(dian)(dian)時(shi)間(jian),一旦(dan)時(shi)間(jian)一到,定(ding)(ding)時(shi)器(qi)即可發出(chu)信號停充(chong)(chong)或降為涓流(liu)充(chong)(chong)電(dian)(dian)。定(ding)(ding)時(shi)器(qi)可由(you)時(shi)間(jian)繼電(dian)(dian)器(qi)充(chong)(chong)當,或者由(you)單片機(ji)承擔其功(gong)能。這種方法簡(jian)單,但充(chong)(chong)電(dian)(dian)時(shi)間(jian)不能根據(ju)電(dian)(dian)池充(chong)(chong)電(dian)(dian)前狀態而自動調整,因(yin)此(ci)實際(ji)充(chong)(chong)電(dian)(dian)時(shi),可能會出(chu)現(xian)有時(shi)欠(qian)充(chong)(chong)、有時(shi)過充(chong)(chong)的(de)現(xian)象;
(2)電(dian)(dian)池(chi)(chi)(chi)溫(wen)(wen)度(du)控(kong)制(zhi)對Ni-cd電(dian)(dian)池(chi)(chi)(chi)而言,正(zheng)常充電(dian)(dian)時,蓄電(dian)(dian)池(chi)(chi)(chi)的溫(wen)(wen)度(du)變化并不明顯(xian),但是(shi),當電(dian)(dian)池(chi)(chi)(chi)過(guo)充時,其內部氣體壓力將迅(xun)速增大,負極板上(shang)氧化反(fan)應(ying)使(shi)內部發(fa)熱,溫(wen)(wen)度(du)迅(xun)速上(shang)升(sheng)(每(mei)分鐘可升(sheng)高(gao)幾個攝氏度(du))。因此,觀(guan)察電(dian)(dian)池(chi)(chi)(chi)溫(wen)(wen)度(du)的變化,即可判斷電(dian)(dian)池(chi)(chi)(chi)是(shi)否已經充滿。通常采用兩只熱敏電(dian)(dian)阻分別(bie)檢測(ce)電(dian)(dian)池(chi)(chi)(chi)溫(wen)(wen)度(du)和環境溫(wen)(wen)度(du),當兩者溫(wen)(wen)差達到一定值時,即發(fa)出(chu)停充信號。由于熱敏電(dian)(dian)阻動態(tai)響應(ying)速度(du)較慢,故不能及(ji)時準確(que)地檢測(ce)到電(dian)(dian)池(chi)(chi)(chi)的滿充狀態(tai);
(3)電池端電壓負增量控制一般而言,當電池充足電后,其端電壓將呈現下降趨勢,據此可將電池電壓出現負增長的時刻作為停充時刻。與溫度控制法相比,這種方法響應速度快,此外,電壓的負增量與電壓的絕對值無關,因此這種停充控制方法可適應具有不同單格電池數的蓄電池組充電。此方法的缺點是一般的檢測器靈敏度和可靠性不高,同時,當環境溫度較高時,電池充足電后電壓的減小并不明顯,因而難以控制。上海(hai)施能電器設備有限(xian)公司始建(jian)于1984年,上海市高新技術企業,中國工業車輛優秀配套供應商,上海電器行業名優產品,主要生產工頻系列充電機,高頻系列充電機,鋰電池充電機系列放電機系列充放電機等電器產品。
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