對汽車電瓶有心得的朋友請進 - 汽車
By Steve
at 2022-04-05T16:45
at 2022-04-05T16:45
Table of Contents
大家好,這裡要討論的是傳統油車,而不是電或油電車
最近因為放到沒電,重新充電,和有電池專業的同學討論
發現一個問題:這段電路是不是沒有仔細檢討?
(油電或電車是較新的設計,會有完整檢討)
原因在於,當我對汽車電瓶充電時
同學對我科普充電電池的常識,所謂的 CC/CV 充電曲線
還有最後的涓流保養
因為我的充電器是充隨身電源的,不是專充汽車電瓶的
所以我同學說:拿電錶驗,萬一充到 13.2V 以上就拔掉,別再充了,再充是過充
後來我發現我的充電器其開路電壓是 12.5V,所以就算了
它會過早進入 CV 充電曲線,但不會過充;我安心睡覺去就算了
可是當我發動汽車,由汽車發電機向汽車電瓶(其實就是鉛酸充電電池)充電
我發現發電機供電高達 14.5V !!
若說 13.2V 以上充電是過充,那麼 14.5V 當然過充了
是不是這段電路都在因循守舊,沒人檢討過呢?
另外放電放到無法發動,再新的電池也會快速老化
(我是去年 12 月換的,明明很新,但同學說沒用了,放到一次全沒就是老電池)
這也是沒檢討電路吧!現在比如鋰電科技,大家都很熟了,就會設計過放保護電路
明明只要在電池輸出加一個過放保護,提早截斷不要輸出
就可以保護這顆鉛酸電池不要過放,使壽命長長久久(保用兩年是很基本的啊)
為什麼不設計?當然啦,設計是擋修車廠財路嘛
你電池常壞才會常去換啊!
可是我現在已經有基本知識,我檢討到了啊!
請問我的檢討有沒有錯誤?有人可以附議一下嗎?
謝謝
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