一、車載手機充電器原理是什么

車載手機充電器即車載充電器，是(shi)指(zhi)用(yong)于安裝在(zai)車上給手機(ji)(ji)等智能(neng)設(she)備(bei)提供充(chong)(chong)電(dian)(dian)(dian)的(de)(de)設(she)備(bei)，車載(zai)充(chong)(chong)電(dian)(dian)(dian)器的(de)(de)工作(zuo)(zuo)原理是(shi)：用(yong)汽車點煙器作(zuo)(zuo)為電(dian)(dian)(dian)源(yuan)插座直(zhi)接為手機(ji)(ji)充(chong)(chong)電(dian)(dian)(dian)，一般情況下，汽車點煙器插座的(de)(de)電(dian)(dian)(dian)壓為12V或24V，車載(zai)充(chong)(chong)電(dian)(dian)(dian)器的(de)(de)作(zuo)(zuo)用(yong)就是(shi)將12V或24V的(de)(de)直(zhi)流電(dian)(dian)(dian)轉換為5V的(de)(de)USB電(dian)(dian)(dian)壓直(zhi)流電(dian)(dian)(dian)，并通過(guo)充(chong)(chong)電(dian)(dian)(dian)線給電(dian)(dian)(dian)子產品(pin)充(chong)(chong)電(dian)(dian)(dian)。

用車載(zai)(zai)(zai)充(chong)電(dian)(dian)(dian)器(qi)要注(zhu)意的(de)是，由于汽車提供的(de)電(dian)(dian)(dian)壓較低，所以車載(zai)(zai)(zai)充(chong)電(dian)(dian)(dian)器(qi)內部需要有(you)過載(zai)(zai)(zai)保(bao)(bao)(bao)護(hu)電(dian)(dian)(dian)路：車載(zai)(zai)(zai)充(chong)電(dian)(dian)(dian)器(qi)的(de)前端設(she)計有(you)一個保(bao)(bao)(bao)險管，當電(dian)(dian)(dian)流(liu)超過過載(zai)(zai)(zai)保(bao)(bao)(bao)護(hu)電(dian)(dian)(dian)路可承(cheng)受范圍時，保(bao)(bao)(bao)險絲立即熔斷(duan)，起(qi)到保(bao)(bao)(bao)護(hu)作用。不過保(bao)(bao)(bao)險絲熔斷(duan)就會導致車載(zai)(zai)(zai)充(chong)電(dian)(dian)(dian)器(qi)被燒掉，那么車載(zai)(zai)(zai)充(chong)電(dian)(dian)(dian)器(qi)燒掉了怎么辦(ban)呢？

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二、車載usb充電器燒壞了怎么辦

車載(zai)usb充電器燒壞了的原因和解決方(fang)法有(you)：

1、車載充電器質量問題

質量問題導致(zhi)電(dian)壓(ya)不穩，燒壞是很正(zheng)常的(de)，還(huan)有一些劣(lie)質車載充(chong)電(dian)器甚至(zhi)沒有保險絲，一旦發生故(gu)障(zhang)可能燒壞的(de)不是車載充(chong)電(dian)器，而(er)是手機或是汽車電(dian)瓶，因此(ci)一定要(yao)購買正(zheng)規的(de)車載充(chong)電(dian)器。

2、車載充電器保險絲斷了

車(che)載(zai)充電器的電流超過保(bao)(bao)護電路承(cheng)受范圍(wei)時，保(bao)(bao)險(xian)(xian)絲會熔斷保(bao)(bao)護，這時候一般更(geng)換一根保(bao)(bao)險(xian)(xian)絲即可，不(bu)過要注(zhu)意的是，許多車(che)主擔心會再(zai)次(ci)熔斷，圖方便(bian)選(xuan)擇更(geng)換更(geng)大安數的保(bao)(bao)險(xian)(xian)絲，但(dan)這是非常危(wei)險(xian)(xian)的，很(hen)可能造成(cheng)下(xia)次(ci)保(bao)(bao)險(xian)(xian)絲熔斷不(bu)及時引(yin)發更(geng)危(wei)險(xian)(xian)的后果(guo)。

3、車載充電器插頭設計不合理

車(che)充(chong)插(cha)頭設計(ji)有(you)問(wen)題，導致插(cha)頭插(cha)入(ru)后，插(cha)頭內的(de)(de)保(bao)險絲金屬(shu)帽后縮(suo)，會(hui)與插(cha)頭側的(de)(de)兩個(ge)彈(dan)片接觸而造成短路。遇上(shang)這種問(wen)題，解(jie)決方法(fa)時給買(mai)來的(de)(de)車(che)充(chong)在保(bao)險管周加上(shang)一層絕緣層，保(bao)證保(bao)險絲金屬(shu)帽不會(hui)與插(cha)頭側的(de)(de)兩個(ge)彈(dan)片接觸即可。