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充電機如何控制過充?

2020/3/26 17:29:49??????點擊:

 我們(men)(men)平時(shi)給充(chong)(chong)電(dian)(dian)機充(chong)(chong)電(dian)(dian),當(dang)蓄(xu)電(dian)(dian)池充(chong)(chong)滿電(dian)(dian)后我們(men)(men)就直接(jie)把充(chong)(chong)電(dian)(dian)機線(xian)拔(ba)掉,其實這(zhe)樣的作(zuo)法(fa)是完(wan)全錯誤(wu)的。充(chong)(chong)電(dian)(dian)工作(zuo)完(wan)成(cheng)后,需要給充(chong)(chong)電(dian)(dian)機堵截(jie)充(chong)(chong)電(dian)(dian)電(dian)(dian)流,否(fou)則(ze)蓄(xu)電(dian)(dian)池將(jiang)出(chu)現大量出(chu)氣、失水和溫升等過充(chong)(chong)的反應,這(zhe)將(jiang)危(wei)及(ji)到蓄(xu)電(dian)(dian)池的使(shi)用壽(shou)命。因此,隨(sui)時(shi)監測蓄(xu)電(dian)(dian)池的充(chong)(chong)電(dian)(dian)情況是非常有(you)必要的,確保電(dian)(dian)池能(neng)夠把電(dian)(dian)充(chong)(chong)足并且又(you)不過充(chong)(chong)電(dian)(dian)。主要的停(ting)充(chong)(chong)操控辦法(fa)有(you):

  1、恒流充電(dian)(dian)(dian)(dian)定(ding)(ding)時控(kong)制法,電(dian)(dian)(dian)(dian)池充電(dian)(dian)(dian)(dian)充滿時,我們(men)可(ke)(ke)以(yi)看(kan)電(dian)(dian)(dian)(dian)池的容量大小,根據(ju)電(dian)(dian)(dian)(dian)流大小來確(que)認。這樣我們(men)就(jiu)要先(xian)預定(ding)(ding)好(hao)充電(dian)(dian)(dian)(dian)的時間,預定(ding)(ding)的充電(dian)(dian)(dian)(dian)時間一(yi)到,充電(dian)(dian)(dian)(dian)機就(jiu)發布信號停(ting)充。定(ding)(ding)時器(qi)可(ke)(ke)由(you)時間繼電(dian)(dian)(dian)(dian)器(qi)充當,或許由(you)單片機承(cheng)當其功用。這種(zhong)辦法簡單,但充電(dian)(dian)(dian)(dian)時間不能(neng)依據(ju)電(dian)(dian)(dian)(dian)池充電(dian)(dian)(dian)(dian)前狀況而(er)自動調整,因此實際充電(dian)(dian)(dian)(dian)時,可(ke)(ke)能(neng)會出現有(you)(you)時欠充、有(you)(you)時過充的表象;

  2、電(dian)池(chi)溫(wen)(wen)度操,正常(chang)充電(dian)情況下,蓄(xu)電(dian)池(chi)的溫(wen)(wen)度變(bian)化(hua)并不明顯,當電(dian)池(chi)過(guo)充時(shi),內部氣(qi)體壓力將快速(su)增大,負極(ji)板上氧(yang)化(hua)反(fan)響(xiang)使內部發熱,溫(wen)(wen)度快速(su)上升(sheng)。因此,調查電(dian)池(chi)溫(wen)(wen)度的改變(bian),即可(ke)判別(bie)電(dian)池(chi)是否(fou)現已充溢(yi)。通(tong)常(chang)選用兩(liang)只(zhi)熱敏電(dian)阻別(bie)離檢(jian)測電(dian)池(chi)溫(wen)(wen)度和環境溫(wen)(wen)度,當兩(liang)者(zhe)溫(wen)(wen)差到達一定值(zhi)時(shi),即宣布停充信(xin)號。因為(wei)熱敏電(dian)阻動態(tai)響(xiang)應速(su)度較慢(man),故不能及時(shi)精(jing)確地檢(jian)測到電(dian)池(chi)的滿充狀況

                                                                                                                               

  3、電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池端(duan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓負增量一般而言(yan),當(dang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池充足電(dian)(dian)(dian)(dian)(dian)(dian)(dian)后,其(qi)端(duan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓將呈現降低趨勢,據(ju)此(ci)可(ke)將電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓出現負增長的(de)時間作為停充時間。與(yu)溫度(du)(du)操(cao)控(kong)(kong)法(fa)(fa)比較,這(zhe)種辦法(fa)(fa)呼應速度(du)(du)快(kuai),此(ci)外,電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓的(de)負增量與(yu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓的(de)絕對(dui)值(zhi)無(wu)關(guan),因此(ci)這(zhe)種停充操(cao)控(kong)(kong)辦法(fa)(fa)可(ke)適應具有不(bu)一樣單(dan)格電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池數的(de)蓄電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池組(zu)充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)。此(ci)辦法(fa)(fa)的(de)缺陷是一般的(de)檢測器(qi)靈敏(min)度(du)(du)和可(ke)靠(kao)性不(bu)高,同時,當(dang)環境(jing)溫度(du)(du)較高時,電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池足夠電(dian)(dian)(dian)(dian)(dian)(dian)(dian)后電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓的(de)減小并(bing)不(bu)顯(xian)著,因此(ci)難以操(cao)控(kong)(kong);

  4、使用(yong)極(ji)(ji)化(hua)電(dian)壓操(cao)控通常情況下,蓄(xu)(xu)電(dian)池(chi)(chi)的(de)(de)(de)極(ji)(ji)化(hua)電(dian)壓出現(xian)在電(dian)池(chi)(chi)剛好充(chong)滿后,選用(yong)有關專利技術來測量每個(ge)單格電(dian)池(chi)(chi)的(de)(de)(de)極(ji)(ji)化(hua)電(dian)壓,這樣就使每個(ge)電(dian)池(chi)(chi)都可充(chong)電(dian)到它自(zi)身所需求的(de)(de)(de)程度。研討表明,因為每個(ge)電(dian)池(chi)(chi)在幾(ji)何結構(gou)、化(hua)學性(xing)質及電(dian)學特(te)(te)性(xing)等(deng)方面至少存在一些細微的(de)(de)(de)不同,那么依據(ju)每個(ge)單格電(dian)池(chi)(chi)的(de)(de)(de)特(te)(te)性(xing)來斷定它所需求的(de)(de)(de)充(chong)電(dian)水平會比把蓄(xu)(xu)電(dian)池(chi)(chi)組(zu)作為一個(ge)整(zheng)體來操(cao)控的(de)(de)(de)辦法更加適宜(yi)一些。

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