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充電機如何控制過充?

2019/3/12 9:04:12??????點擊:
  當蓄(xu)電(dian)(dian)池充滿電(dian)(dian)以后,充電(dian)(dian)機(ji)需(xu)要適(shi)時(shi)地(di)堵截充電(dian)(dian)電(dian)(dian)流,否(fou)則蓄(xu)電(dian)(dian)池將出(chu)現大量(liang)出(chu)氣(qi)、失(shi)水和(he)溫升等(deng)過充的(de)(de)(de)反應,這將危及到蓄(xu)電(dian)(dian)池的(de)(de)(de)使用(yong)壽命。因此,隨時(shi)監測蓄(xu)電(dian)(dian)池的(de)(de)(de)充電(dian)(dian)情況是非常有(you)必要的(de)(de)(de),確保電(dian)(dian)池能夠把(ba)電(dian)(dian)充足并且又不(bu)過充電(dian)(dian)。主要的(de)(de)(de)停充操控辦(ban)法(fa)有(you):
  第一(yi)、定(ding)時控制選用恒流(liu)(liu)充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)法時,電(dian)(dian)(dian)(dian)池(chi)(chi)所需充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)時間(jian)(jian)可(ke)(ke)依據(ju)電(dian)(dian)(dian)(dian)池(chi)(chi)容(rong)量和充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)流(liu)(liu)的大(da)小很容(rong)易地(di)確定(ding),因此只需預先設定(ding)好充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)時間(jian)(jian),一(yi)旦時間(jian)(jian)一(yi)到,守時器(qi)即(ji)可(ke)(ke)發布信號停(ting)充(chong)(chong)(chong)(chong)或降為涓流(liu)(liu)充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)。定(ding)時器(qi)可(ke)(ke)由時間(jian)(jian)繼電(dian)(dian)(dian)(dian)器(qi)充(chong)(chong)(chong)(chong)當(dang)(dang),或許(xu)由單片(pian)機承當(dang)(dang)其功用。這種辦法簡(jian)單,但(dan)充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)時間(jian)(jian)不(bu)能依據(ju)電(dian)(dian)(dian)(dian)池(chi)(chi)充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)前(qian)狀況而自動調整(zheng),因此實際充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)時,可(ke)(ke)能會出現有(you)時欠充(chong)(chong)(chong)(chong)、有(you)時過充(chong)(chong)(chong)(chong)的表象;
  第二、電(dian)池(chi)溫(wen)(wen)(wen)度(du)(du)操控(kong)對Ni-cd電(dian)池(chi)而言(yan),正常(chang)(chang)充(chong)電(dian)時(shi)(shi),蓄電(dian)池(chi)的(de)溫(wen)(wen)(wen)度(du)(du)改(gai)變并不顯(xian)著,可(ke)是,當電(dian)池(chi)過充(chong)時(shi)(shi),其(qi)內部(bu)氣體壓力將快速增大,負極板上氧(yang)化反響使內部(bu)發熱(re),溫(wen)(wen)(wen)度(du)(du)快速上升(每分鐘可(ke)升高幾(ji)個(ge)攝氏度(du)(du))。因此,調查(cha)電(dian)池(chi)溫(wen)(wen)(wen)度(du)(du)的(de)改(gai)變,即可(ke)判別電(dian)池(chi)是否現(xian)已充(chong)溢。通常(chang)(chang)選(xuan)用兩(liang)只熱(re)敏電(dian)阻別離(li)檢測電(dian)池(chi)溫(wen)(wen)(wen)度(du)(du)和環(huan)境溫(wen)(wen)(wen)度(du)(du),當兩(liang)者溫(wen)(wen)(wen)差到達(da)一定值時(shi)(shi),即宣布(bu)停充(chong)信號。因為熱(re)敏電(dian)阻動態響應(ying)速度(du)(du)較慢,故不能及(ji)時(shi)(shi)精確地檢測到電(dian)池(chi)的(de)滿充(chong)狀況;
  第三(san)、電(dian)(dian)(dian)(dian)池端電(dian)(dian)(dian)(dian)壓(ya)負增(zeng)量(liang)一(yi)(yi)般(ban)而言,當電(dian)(dian)(dian)(dian)池充(chong)(chong)(chong)足(zu)電(dian)(dian)(dian)(dian)后,其端電(dian)(dian)(dian)(dian)壓(ya)將呈現(xian)降低趨勢,據此可將電(dian)(dian)(dian)(dian)池電(dian)(dian)(dian)(dian)壓(ya)出現(xian)負增(zeng)長的(de)(de)時(shi)間作(zuo)為停充(chong)(chong)(chong)時(shi)間。與溫度操(cao)(cao)控法比較,這種(zhong)辦(ban)法呼應(ying)速度快,此外(wai),電(dian)(dian)(dian)(dian)壓(ya)的(de)(de)負增(zeng)量(liang)與電(dian)(dian)(dian)(dian)壓(ya)的(de)(de)絕(jue)對值(zhi)無關,因此這種(zhong)停充(chong)(chong)(chong)操(cao)(cao)控辦(ban)法可適應(ying)具有不(bu)一(yi)(yi)樣單格電(dian)(dian)(dian)(dian)池數的(de)(de)蓄電(dian)(dian)(dian)(dian)池組充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)。此辦(ban)法的(de)(de)缺陷是一(yi)(yi)般(ban)的(de)(de)檢測(ce)器靈敏度和(he)可靠(kao)性不(bu)高(gao),同(tong)時(shi),當環(huan)境溫度較高(gao)時(shi),電(dian)(dian)(dian)(dian)池足(zu)夠電(dian)(dian)(dian)(dian)后電(dian)(dian)(dian)(dian)壓(ya)的(de)(de)減(jian)小并不(bu)顯著,因此難以操(cao)(cao)控;
  第四、使用極化電壓操控通常情況下,蓄電池的極化電壓出現在電池剛好充滿后,通常在50mV~100mV數量級,選用有關專利技術來測量每個單格電池的極化電壓,這樣就使每個電池都可充電到它自身所需求的程度。研討表明,因為每個電池在幾何結構、化學性質及電學特性等方面至少存在一些細微的不同,那么依據每個單格電池的特性來斷定它所需求的充電水平會比把蓄電池組作為一個整體來操控的辦法更加適宜一些。上海施能電器(qi)設備有限公司始建于1984年(nian),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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