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深度剖析蓄電池容量測試方法

2018-08-22   |  來源:煒業通科技

蓄電池的容(rong)(rong)量問題是使用者(zhe)非常(chang)關心的問題,商家(jia)說一個(ge)電池的容(rong)(rong)量的多少到底(di)可靠不?今天(tian)鋰(li)電池廠家(jia)跟大家(jia)一起來剖析蓄電池容(rong)(rong)量的測(ce)試方法,我(wo)們自己可以來測(ce)試蓄電池的容(rong)(rong)量:

  蓄(xu)電(dian)(dian)(dian)(dian)池(chi)(chi)的(de)(de)(de)(de)(de)自(zi)行放(fang)電(dian)(dian)(dian)(dian)和(he)極板逐(zhu)漸硫化(hua)是(shi)鉛(qian)酸蓄(xu)電(dian)(dian)(dian)(dian)池(chi)(chi)不(bu)可避(bi)免的(de)(de)(de)(de)(de)"漸生故(gu)(gu)障(zhang)",只是(shi)隨著對產品材料和(he)工(gong)藝日趨嚴格的(de)(de)(de)(de)(de)要(yao)(yao)求,如(ru)變鉛(qian)銻合金(jin)為(wei)鉛(qian)鈣(gai)合金(jin),又逐(zhu)步變為(wei)"全程免維(wei)護"而(er)已(yi)。有些人(ren)習(xi)慣僅(jin)使用電(dian)(dian)(dian)(dian)壓(ya)表或萬用表的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)壓(ya)檔不(bu)加負載來(lai)檢查蓄(xu)電(dian)(dian)(dian)(dian)池(chi)(chi)的(de)(de)(de)(de)(de)存電(dian)(dian)(dian)(dian)是(shi)否充足,這是(shi)很不(bu)可靠的(de)(de)(de)(de)(de)。因(yin)為(wei)即(ji)使是(shi)啟動放(fang)電(dian)(dian)(dian)(dian)終了的(de)(de)(de)(de)(de)蓄(xu)電(dian)(dian)(dian)(dian)池(chi)(chi),只要(yao)(yao)一旦停止(zhi)放(fang)電(dian)(dian)(dian)(dian),蓄(xu)電(dian)(dian)(dian)(dian)池(chi)(chi)的(de)(de)(de)(de)(de)正負極板和(he)電(dian)(dian)(dian)(dian)解液之間馬(ma)上就能夠達到開路電(dian)(dian)(dian)(dian)壓(ya)--電(dian)(dian)(dian)(dian)動勢,馬(ma)上就能恢復它們之間的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)位差,每單(dan)格約2.1V,整個(ge)電(dian)(dian)(dian)(dian)池(chi)(chi)約12.6V以(yi)上。單(dan)單(dan)測(ce)量電(dian)(dian)(dian)(dian)壓(ya)時,消(xiao)耗電(dian)(dian)(dian)(dian)流極少,故(gu)(gu)而(er)不(bu)會(hui)在電(dian)(dian)(dian)(dian)池(chi)(chi)內(nei)部(bu)產生大的(de)(de)(de)(de)(de)壓(ya)降,所以(yi)顯示電(dian)(dian)(dian)(dian)壓(ya)并不(bu)低,但(dan)若(ruo)加上相當的(de)(de)(de)(de)(de)負載,如(ru)前照燈(deng)(10~15A)、喇(la)(la)叭(6~12A),電(dian)(dian)(dian)(dian)瓶便會(hui)使燈(deng)光暗淡、喇(la)(la)叭沙(sha)啞,從而(er)顯示出(chu)存電(dian)(dian)(dian)(dian)不(bu)足。

  當電解液液面過低時,兩只小球都(dou)將下(xia)落到極限位置,此時觀測(ce)孔(kong)上呈(cheng)"外紅(hong)內(nei)無色(se)"(中心(xin)呈(cheng)無色(se)透(tou)明(ming)(ming)圓點,周圍是(shi)紅(hong)色(se)圓環),表示(shi)(shi)電解液不足,說明(ming)(ming)蓄電池(chi)不能(neng)繼(ji)續使用,必(bi)須(xu)更(geng)換。如果(guo)這種檢測(ce)栓(shuan)裝在干荷蓄電池(chi)上,則(ze)表示(shi)(shi)必(bi)須(xu)添加蒸餾水。英文(wen)說明(ming)(ming)標示(shi)(shi)為"Adddistilledwater".

  蓄(xu)(xu)電池(chi)是(shi)一種(zhong)易損耗的大型零(ling)部(bu)件,其壽命(ming)長的可達3~4年,短(duan)的1~2年,而(er)且越是(shi)經常(chang)行駛的汽(qi)車(尤其是(shi)長途使用),蓄(xu)(xu)電池(chi)壽命(ming)越長;越是(shi)經常(chang)停(ting)放(fang)的汽(qi)車或公共(gong)汽(qi)車,經常(chang)放(fang)電卻又充電不足(zu),蓄(xu)(xu)電池(chi)壽命(ming)反(fan)而(er)更短(duan)。

  蓄(xu)電(dian)(dian)池(chi)工(gong)作原(yuan)理:充電(dian)(dian)時(shi)利用外部的(de)電(dian)(dian)能使(shi)內(nei)部活性物質再生(sheng),把電(dian)(dian)能儲存(cun)為(wei)(wei)化學能,需要放(fang)電(dian)(dian)時(shi)再次把化學能轉(zhuan)換為(wei)(wei)電(dian)(dian)能輸出(chu)。當蓄(xu)電(dian)(dian)池(chi)電(dian)(dian)量不足,電(dian)(dian)解(jie)液密度(du)過(guo)低時(shi),藍色(se)小(xiao)球下沉到(dao)極限位置(zhi),則觀察孔呈(cheng)現"內(nei)紅外無色(se)"(中心呈(cheng)紅色(se)圓點,周圍是無色(se)透明圓環),表示蓄(xu)電(dian)(dian)池(chi)虧電(dian)(dian)嚴重,必(bi)須立即充電(dian)(dian),英文說明標為(wei)(wei)"chargingnecessary".

  蓄電池日常維護方法解析:

  一、測(ce)量浮充電壓法(fa)

  二、容量測量法

  三、內阻或電(dian)導測試法(fa)

  四、傳統(tong)的離線(xian)容量測試法

  此(ci)種檢測方法測量電(dian)池(chi)的(de)容量數值準確(que),能夠清晰(xi)的(de)判別電(dian)池(chi)是否(fou)為失(shi)效電(dian)池(chi)。但此(ci)種方法存在下列缺陷(xian):

  1、電(dian)池(chi)須脫(tuo)離系(xi)統(tong),若這期(qi)間市電(dian)突然中(zhong)斷,另一組電(dian)池(chi)能否(fou)獨撐?增(zeng)加系(xi)統(tong)癱瘓風險(xian)。

  2、笨(ben)重的電熱絲需(xu)要(yao)多人(ren)搬運,且(qie)至少須一人(ren)測量一人(ren)記錄數據。

  3、個別電池端電壓可能在兩次(ci)測量間隔期間突(tu)然(ran)降至截止電壓以(yi)下,造成過度放電,如圖三所示(shi)。工作(zuo)量過大,難(nan)于全面進行(xing)。

  4、整(zheng)組(zu)電池須(xu)花費(fei)二十(shi)幾(ji)小時(shi)充電,有時(shi)需離線之整(zheng)流器,且易(yi)造(zao)成(cheng)某幾(ji)個電池過充。

  5、須消耗大量之(zhi)電能與熱能。

  五(wu)、傳統的在(zai)線(xian)容量測試法

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