對手機充電器的基本認識
所有手機充電器其實都是由一個穩定電源（主要是穩壓電源、提供穩定工作電壓和足夠的電流）加上必要的恒流、限壓(ya)、限時等控制電路構成。
原裝充電器（指(zhi)線(xian)充）上所(suo)標注的輸出(chu)參數(shu)：比如輸出(chu)4。4V/1A、輸出(chu)5.9V/400mA……就是(shi)指(zhi)內部穩壓電(dian)源的相(xiang)關參數(shu)。明白了這(zhe)個(ge)道理，你(ni)很會知(zhi)道一個(ge)（品質好的）手機充電(dian)器很容易改成一個(ge)質量優良(liang)的穩壓電(dian)源！ 比如輸出(chu)4.4V可以給(gei)4.5V的設備用，5.9V的可以給(gei)6V的設備用……
手機常用鋰離子（lion）電池的充電器采(cai)用的是恒流(liu)限壓(ya)充電制，充電電流(liu)一般采(cai)用C2左右----即采(cai)用兩小(xiao)時(shi)充電率，比如500mah電池采(cai)用250ma充電大約兩小(xiao)時(shi)達(da)到4。2V后再恒壓(ya)充電。
lion電(dian)(dian)(dian)(dian)池(chi)并不適(shi)合采用NIMH電(dian)(dian)(dian)(dian)池(chi)高(gao)級快速充(chong)(chong)電(dian)(dian)(dian)(dian)器所用的-DV/DT檢測(ce)快速充(chong)(chong)電(dian)(dian)(dian)(dian)方式(shi)，因為(wei)lion電(dian)(dian)(dian)(dian)池(chi)對充(chong)(chong)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)流有嚴格的限制.鋰離(li)子（Li+）非常活潑，大電(dian)(dian)(dian)(dian)流充(chong)(chong)電(dian)(dian)(dian)(dian)很容易(yi)產生危險。
有機會(hui)接(jie)觸國內(nei)最著名的lion離子電(dian)芯廠家的技術(shu)人員，根據(ju)他們提供的破壞性實驗報告情(qing)況(kuang)(kuang)：一般(ban)情(qing)況(kuang)(kuang)下lion電(dian)池（電(dian)芯）在(zai)放電(dian)情(qing)況(kuang)(kuang)（包括短路）一般(ban)都不會(hui)發生爆炸，但有可(ke)能出現(xian)過(guo)熱和燃(ran)燒(shao)，但在(zai)比較嚴重的過(guo)流(liu)充電(dian)情(qing)況(kuang)(kuang)，就非常容易發生爆炸！
目前市(shi)場上出(chu)現標稱可以適合(he)250mah---2500mah電(dian)(dian)(dian)(dian)(dian)池充電(dian)(dian)(dian)(dian)(dian)的“萬(wan)能手機充電(dian)(dian)(dian)(dian)(dian)器”，其實(shi)是(shi)(shi)非(fei)常危(wei)險的，它缺乏對(dui)電(dian)(dian)(dian)(dian)(dian)池容量的檢測，采用固定的輸出(chu)電(dian)(dian)(dian)(dian)(dian)流，對(dui)不同(tong)的電(dian)(dian)(dian)(dian)(dian)池而(er)言，不是(shi)(shi)導致充電(dian)(dian)(dian)(dian)(dian)時間過(guo)長就是(shi)(shi)導致過(guo)流充電(dian)(dian)(dian)(dian)(dian)。
現在的(de)USB手機充電(dian)(dian)(dian)器，只不利用了電(dian)(dian)(dian)腦(nao)USB口(kou)所(suo)(suo)具備的(de)比較(jiao)穩定的(de)來自電(dian)(dian)(dian)腦(nao)電(dian)(dian)(dian)源(yuan)的(de)5。0v電(dian)(dian)(dian)壓(ya)作為充電(dian)(dian)(dian)電(dian)(dian)(dian)壓(ya)源(yuan)，再(zai)同樣輔(fu)以相關的(de)電(dian)(dian)(dian)路(lu)而構成(cheng)USB手機充電(dian)(dian)(dian)器，其輸出(chu)(chu)品質(zhi)除受(shou)制(zhi)于USB口(kou)最大輸出(chu)(chu)電(dian)(dian)(dian)流(liu)外，關鍵就是(shi)取決(jue)于充電(dian)(dian)(dian)電(dian)(dian)(dian)路(lu)本身的(de)設計和材料(liao)的(de)優劣了。所(suo)(suo)以，大家要買設計比較(jiao)合理(li)、信譽好的(de)名牌大廠的(de)產品。
本文摘自于全球電池網(wang)