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處理充電機突然停電的方法

2020/3/24 16:48:54??????點擊:

 當蓄(xu)(xu)電(dian)池(chi)(chi)充(chong)足電(dian)后,充(chong)電(dian)機必須適時地切斷(duan)充(chong)電(dian)電(dian)流,否則蓄(xu)(xu)電(dian)池(chi)(chi)將出現大量出氣、失水和溫(wen)升等過充(chong)反應(ying),直接危及蓄(xu)(xu)電(dian)池(chi)(chi)的使用(yong)壽命(ming)。因此,必須隨時監(jian)測(ce)蓄(xu)(xu)電(dian)池(chi)(chi)的充(chong)電(dian)狀況,保(bao)證電(dian)池(chi)(chi)充(chong)足電(dian)而(er)又不過充(chong)電(dian)。主要(yao)的停充(chong)控制(zhi)方法(fa)有:

(1)定(ding)時(shi)控制采用恒流(liu)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)法(fa)時(shi),電(dian)(dian)(dian)(dian)(dian)(dian)池(chi)所(suo)需充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)時(shi)間可(ke)根據(ju)電(dian)(dian)(dian)(dian)(dian)(dian)池(chi)容量和充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)的(de)大小很容易(yi)地確定(ding),因此(ci)只(zhi)要(yao)預先(xian)設(she)定(ding)好充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)時(shi)間,一(yi)旦時(shi)間一(yi)到,定(ding)時(shi)器即(ji)可(ke)發出信號停充(chong)(chong)(chong)或降(jiang)為(wei)涓流(liu)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)。定(ding)時(shi)器可(ke)由時(shi)間繼(ji)電(dian)(dian)(dian)(dian)(dian)(dian)器充(chong)(chong)(chong)當,或者由單片機承擔其功能。這種方法(fa)簡(jian)單,但充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)時(shi)間不能根據(ju)電(dian)(dian)(dian)(dian)(dian)(dian)池(chi)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)前狀(zhuang)態而自(zi)動調(diao)整,因此(ci)實(shi)際充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)時(shi),可(ke)能會出現(xian)有時(shi)欠充(chong)(chong)(chong)、有時(shi)過(guo)充(chong)(chong)(chong)的(de)現(xian)象;

(2)電池(chi)(chi)(chi)溫(wen)(wen)(wen)度(du)(du)(du)(du)控制對Ni-cd電池(chi)(chi)(chi)而(er)言,正常充電時,蓄電池(chi)(chi)(chi)的溫(wen)(wen)(wen)度(du)(du)(du)(du)變(bian)化并不明顯,但是,當(dang)電池(chi)(chi)(chi)過(guo)充時,其(qi)內部(bu)(bu)氣體壓力(li)將(jiang)迅(xun)速增大,負極板上氧化反應使內部(bu)(bu)發(fa)熱(re),溫(wen)(wen)(wen)度(du)(du)(du)(du)迅(xun)速上升(sheng)(sheng)(每分鐘可升(sheng)(sheng)高幾(ji)個攝(she)氏(shi)度(du)(du)(du)(du))。因此(ci),觀(guan)察電池(chi)(chi)(chi)溫(wen)(wen)(wen)度(du)(du)(du)(du)的變(bian)化,即(ji)可判斷電池(chi)(chi)(chi)是否(fou)已經充滿。通常采用兩只熱(re)敏電阻分別檢(jian)測(ce)電池(chi)(chi)(chi)溫(wen)(wen)(wen)度(du)(du)(du)(du)和環境(jing)溫(wen)(wen)(wen)度(du)(du)(du)(du),當(dang)兩者溫(wen)(wen)(wen)差達到一(yi)定值時,即(ji)發(fa)出停充信(xin)號(hao)。由于熱(re)敏電阻動態響應速度(du)(du)(du)(du)較慢,故不能及時準確地檢(jian)測(ce)到電池(chi)(chi)(chi)的滿充狀(zhuang)態;

(3)電(dian)(dian)(dian)(dian)池(chi)(chi)端(duan)電(dian)(dian)(dian)(dian)壓(ya)負(fu)增(zeng)(zeng)量控(kong)(kong)制(zhi)一般(ban)而言,當(dang)電(dian)(dian)(dian)(dian)池(chi)(chi)充(chong)足電(dian)(dian)(dian)(dian)后,其端(duan)電(dian)(dian)(dian)(dian)壓(ya)將呈現下降趨勢,據此(ci)(ci)可將電(dian)(dian)(dian)(dian)池(chi)(chi)電(dian)(dian)(dian)(dian)壓(ya)出現負(fu)增(zeng)(zeng)長的(de)時刻(ke)作為(wei)停(ting)充(chong)時刻(ke)。與溫度(du)控(kong)(kong)制(zhi)法相比,這(zhe)種(zhong)方法響應(ying)速(su)度(du)快,此(ci)(ci)外,電(dian)(dian)(dian)(dian)壓(ya)的(de)負(fu)增(zeng)(zeng)量與電(dian)(dian)(dian)(dian)壓(ya)的(de)絕對值無關,因此(ci)(ci)這(zhe)種(zhong)停(ting)充(chong)控(kong)(kong)制(zhi)方法可適應(ying)具有不同單格電(dian)(dian)(dian)(dian)池(chi)(chi)數的(de)蓄電(dian)(dian)(dian)(dian)池(chi)(chi)組(zu)充(chong)電(dian)(dian)(dian)(dian)。此(ci)(ci)方法的(de)缺點是一般(ban)的(de)檢測器靈敏度(du)和(he)可靠性不高,同時,當(dang)環境(jing)溫度(du)較高時,電(dian)(dian)(dian)(dian)池(chi)(chi)充(chong)足電(dian)(dian)(dian)(dian)后電(dian)(dian)(dian)(dian)壓(ya)的(de)減小并(bing)不明顯,因而難以(yi)控(kong)(kong)制(zhi)。

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