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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)電(dian)(dian)(dian)池(chi)(chi)充足電(dian)(dian)(dian)后,充電(dian)(dian)(dian)機必須適時地切斷充電(dian)(dian)(dian)電(dian)(dian)(dian)流,否則蓄(xu)電(dian)(dian)(dian)池(chi)(chi)將(jiang)出(chu)現大量(liang)出(chu)氣、失水和溫升等過充反應(ying),直接危(wei)及蓄(xu)電(dian)(dian)(dian)池(chi)(chi)的(de)使用壽(shou)命。因此,必須隨時監測蓄(xu)電(dian)(dian)(dian)池(chi)(chi)的(de)充電(dian)(dian)(dian)狀(zhuang)況(kuang),保證電(dian)(dian)(dian)池(chi)(chi)充足電(dian)(dian)(dian)而又不過充電(dian)(dian)(dian)。主要的(de)停充控制(zhi)方(fang)法(fa)有:

(1)定時控制采用恒流(liu)充(chong)(chong)(chong)電(dian)(dian)法(fa)時,電(dian)(dian)池所(suo)需充(chong)(chong)(chong)電(dian)(dian)時間可(ke)根據(ju)電(dian)(dian)池容量和充(chong)(chong)(chong)電(dian)(dian)電(dian)(dian)流(liu)的大小很(hen)容易(yi)地確定,因此只要預先設定好充(chong)(chong)(chong)電(dian)(dian)時間,一旦時間一到,定時器即可(ke)發出信號停充(chong)(chong)(chong)或降為涓(juan)流(liu)充(chong)(chong)(chong)電(dian)(dian)。定時器可(ke)由時間繼電(dian)(dian)器充(chong)(chong)(chong)當(dang),或者由單(dan)(dan)片機(ji)承擔其(qi)功能(neng)。這種方法(fa)簡(jian)單(dan)(dan),但充(chong)(chong)(chong)電(dian)(dian)時間不能(neng)根據(ju)電(dian)(dian)池充(chong)(chong)(chong)電(dian)(dian)前(qian)狀態而自動(dong)調(diao)整(zheng),因此實(shi)際充(chong)(chong)(chong)電(dian)(dian)時,可(ke)能(neng)會(hui)出現有時欠(qian)充(chong)(chong)(chong)、有時過充(chong)(chong)(chong)的現象;

(2)電(dian)(dian)池(chi)溫度(du)控制對Ni-cd電(dian)(dian)池(chi)而言,正常充電(dian)(dian)時(shi),蓄(xu)電(dian)(dian)池(chi)的溫度(du)變化(hua)(hua)并不明顯,但是,當電(dian)(dian)池(chi)過充時(shi),其內部(bu)氣(qi)體(ti)壓力(li)將迅速(su)增大,負極(ji)板(ban)上氧化(hua)(hua)反(fan)應使(shi)內部(bu)發熱(re),溫度(du)迅速(su)上升(每分鐘可升高幾個攝(she)氏度(du))。因此,觀察電(dian)(dian)池(chi)溫度(du)的變化(hua)(hua),即可判斷電(dian)(dian)池(chi)是否(fou)已經充滿(man)。通常采用(yong)兩只熱(re)敏(min)電(dian)(dian)阻分別檢測(ce)電(dian)(dian)池(chi)溫度(du)和環境(jing)溫度(du),當兩者(zhe)溫差達到(dao)一(yi)定值時(shi),即發出停充信(xin)號。由于熱(re)敏(min)電(dian)(dian)阻動態(tai)響應速(su)度(du)較慢,故不能(neng)及時(shi)準確(que)地檢測(ce)到(dao)電(dian)(dian)池(chi)的滿(man)充狀態(tai);

(3)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)端電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓負增量(liang)(liang)控(kong)制(zhi)一般而(er)言,當電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)充(chong)(chong)足電(dian)(dian)(dian)(dian)(dian)(dian)(dian)后,其端電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓將呈現(xian)下降(jiang)趨(qu)勢,據此(ci)可將電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓出現(xian)負增長的(de)時刻作為停(ting)充(chong)(chong)時刻。與溫度(du)(du)控(kong)制(zhi)法(fa)(fa)相比,這種方(fang)(fang)法(fa)(fa)響應(ying)速度(du)(du)快,此(ci)外,電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓的(de)負增量(liang)(liang)與電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓的(de)絕對(dui)值(zhi)無關(guan),因(yin)(yin)此(ci)這種停(ting)充(chong)(chong)控(kong)制(zhi)方(fang)(fang)法(fa)(fa)可適應(ying)具有不同單(dan)格(ge)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)數的(de)蓄電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)組充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)。此(ci)方(fang)(fang)法(fa)(fa)的(de)缺點是一般的(de)檢測器靈敏(min)度(du)(du)和可靠性不高,同時,當環(huan)境溫度(du)(du)較高時,電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)充(chong)(chong)足電(dian)(dian)(dian)(dian)(dian)(dian)(dian)后電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓的(de)減小并不明顯,因(yin)(yin)而(er)難以控(kong)制(zhi)。

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