茄子视频APP官网

施能百科

充電機在設計過程中需要注意什么事項?

2020/3/10 14:18:53??????點擊:

為了可(ke)以(yi)提高電(dian)(dian)(dian)(dian)池(chi)再充(chong)電(dian)(dian)(dian)(dian)期間的(de)可(ke)靠性和(he)穩(wen)定性,電(dian)(dian)(dian)(dian)池(chi)充(chong)電(dian)(dian)(dian)(dian)機,我(wo)(wo)們(men)將使用電(dian)(dian)(dian)(dian)源管(guan)理(li)芯片以(yi)控制(zhi)電(dian)(dian)(dian)(dian)池(chi)充(chong)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)壓和(he)電(dian)(dian)(dian)(dian)流,但是使用的(de)電(dian)(dian)(dian)(dian)池(chi)充(chong)電(dian)(dian)(dian)(dian)機充(chong)電(dian)(dian)(dian)(dian)的(de)電(dian)(dian)(dian)(dian)源管(guan)理(li)電(dian)(dian)(dian)(dian)路的(de)芯片設計時(shi),我(wo)(wo)們(men)往往電(dian)(dian)(dian)(dian)池(chi)充(chong)電(dian)(dian)(dian)(dian)有(you)工作充(chong)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)路有(you)些混亂機的(de)各個(ge)時(shi)期的(de)狀態和(he)電(dian)(dian)(dian)(dian)路設計方面的(de)考慮(lv)。

??電池(chi)充電方式簡介

??理論上為了防止因充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)不當(dang)而(er)造成電(dian)(dian)(dian)(dian)(dian)池壽命縮短,我們(men)將電(dian)(dian)(dian)(dian)(dian)池的充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)過程分為四個階(jie)段:涓流(liu)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(低壓(ya)預充(chong)(chong)(chong),此狀態的電(dian)(dian)(dian)(dian)(dian)池電(dian)(dian)(dian)(dian)(dian)壓(ya)比較(jiao)低,實際使用(yong)時,建議將鋰電(dian)(dian)(dian)(dian)(dian)池欠壓(ya)保護點提高,避免電(dian)(dian)(dian)(dian)(dian)池出現過放(fang)電(dian)(dian)(dian)(dian)(dian)現象)、恒流(liu)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)、恒壓(ya)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)以(yi)及充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)終止。

??典型(xing)的(de)(de)(de)蓄電(dian)(dian)(dian)(dian)(dian)(dian)池充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)方式(shi)是:先(xian)檢測待充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)池的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya),在(zai)電(dian)(dian)(dian)(dian)(dian)(dian)池電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)較低情況下(xia),先(xian)進(jin)行預充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian),充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)為(wei)設(she)定的(de)(de)(de)最(zui)大(da)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)的(de)(de)(de)1/10,當(dang)電(dian)(dian)(dian)(dian)(dian)(dian)池電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)升(sheng)到一定值后,進(jin)入標準充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)過(guo)程。標準充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)過(guo)程為(wei):以(yi)最(zui)大(da)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)進(jin)行恒流(liu)(liu)(liu)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian),電(dian)(dian)(dian)(dian)(dian)(dian)池電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)持續穩(wen)定上升(sheng),當(dang)電(dian)(dian)(dian)(dian)(dian)(dian)池電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)升(sheng)到接近設(she)定的(de)(de)(de)最(zui)大(da)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)時,改為(wei)恒壓(ya)(ya)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian),此時,充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)逐漸下(xia)降(jiang),當(dang)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)下(xia)降(jiang)至(zhi)最(zui)大(da)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)的(de)(de)(de)1/10時,充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)結束。

??但在實(shi)際應用中,為增(zeng)加電(dian)(dian)池(chi)充(chong)放電(dian)(dian)循環(huan)次數和縮短充(chong)電(dian)(dian)時間,我(wo)們會將鋰(li)電(dian)(dian)池(chi)欠(qian)壓保護點提高,同時設(she)定(ding)的充(chong)電(dian)(dian)終(zhong)止電(dian)(dian)壓低于標稱值,這樣電(dian)(dian)池(chi)便不會存在過充(chong)與過放現象,且(qie)可以(yi)避開“預充(chong)電(dian)(dian)”階段(duan),直接進(jin)行(xing)大電(dian)(dian)流充(chong)電(dian)(dian),縮短充(chong)電(dian)(dian)時間。

??充電機電路設計應(ying)注意的(de)事項

??若設(she)計(ji)的(de)蓄電(dian)(dian)(dian)(dian)池(chi)(chi)充電(dian)(dian)(dian)(dian)機充電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)路(lu)沒有(you)防倒灌保護(hu),將(jiang)(jiang)會(hui)產生(sheng)許多危害(hai)。以輸(shu)(shu)(shu)出(chu)端(duan)(duan)接2節(jie)鋰(li)電(dian)(dian)(dian)(dian)池(chi)(chi)串聯為例,若僅將(jiang)(jiang)電(dian)(dian)(dian)(dian)源去除,蓄電(dian)(dian)(dian)(dian)池(chi)(chi)充電(dian)(dian)(dian)(dian)機沒有(you)移除,電(dian)(dian)(dian)(dian)池(chi)(chi)內(nei)的(de)電(dian)(dian)(dian)(dian)流(liu)倒灌至充電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)路(lu)中,導致電(dian)(dian)(dian)(dian)池(chi)(chi)電(dian)(dian)(dian)(dian)量白(bai)白(bai)損失。且更嚴重的(de)安全隱(yin)患(huan)是:對于(yu)(yu)降(jiang)壓(ya)(ya)電(dian)(dian)(dian)(dian)源芯(xin)(xin)片(pian)來說(shuo)(shuo),電(dian)(dian)(dian)(dian)池(chi)(chi)電(dian)(dian)(dian)(dian)流(liu)從輸(shu)(shu)(shu)出(chu)端(duan)(duan),經(jing)芯(xin)(xin)片(pian)內(nei)部功率管寄生(sheng)的(de)二極管倒灌至芯(xin)(xin)片(pian)的(de)VIN端(duan)(duan),當(dang)電(dian)(dian)(dian)(dian)路(lu)的(de)輸(shu)(shu)(shu)出(chu)端(duan)(duan)電(dian)(dian)(dian)(dian)壓(ya)(ya)(電(dian)(dian)(dian)(dian)池(chi)(chi)電(dian)(dian)(dian)(dian)壓(ya)(ya))低于(yu)(yu)設(she)定值(zhi)時,芯(xin)(xin)片(pian)FB點電(dian)(dian)(dian)(dian)壓(ya)(ya)相應(ying)的(de)也(ye)會(hui)低于(yu)(yu)標稱值(zhi),芯(xin)(xin)片(pian)開(kai)始工作來提高輸(shu)(shu)(shu)出(chu)端(duan)(duan)電(dian)(dian)(dian)(dian)壓(ya)(ya);由(you)于(yu)(yu)輸(shu)(shu)(shu)入端(duan)(duan)電(dian)(dian)(dian)(dian)壓(ya)(ya)幾乎與輸(shu)(shu)(shu)出(chu)端(duan)(duan)相等,對于(yu)(yu)降(jiang)壓(ya)(ya)芯(xin)(xin)片(pian)來說(shuo)(shuo),輸(shu)(shu)(shu)入端(duan)(duan)無法給(gei)輸(shu)(shu)(shu)出(chu)端(duan)(duan)提供能量,導致FB點電(dian)(dian)(dian)(dian)壓(ya)(ya)一(yi)直(zhi)低于(yu)(yu)標稱值(zhi),芯(xin)(xin)片(pian)進入占(zhan)空比(bi)100%的(de)工作狀態。

??如(ru)果(guo)輸入(ru)端(duan)的(de)(de)電(dian)源(yuan)突然(ran)恢復,則輸入(ru)端(duan)的(de)(de)電(dian)源(yuan)將(jiang)通(tong)過已接通(tong)的(de)(de)電(dian)源(yuan)管將(jiang)能量直(zhi)接傳輸到輸出端(duan)。由(you)(you)于輸入(ru)和輸出之間的(de)(de)壓差,一(yi)個相對較(jiao)大的(de)(de)電(dian)流(liu)(liu)會在瞬間流(liu)(liu)過功率管。如(ru)果(guo)此(ci)(ci)時(shi)由(you)(you)于其他不可(ke)控制(zhi)的(de)(de)原因(yin),導(dao)致(zhi)核心不能及(ji)時(shi)有效地響應關閉電(dian)源(yuan)管,則大電(dian)流(liu)(liu)可(ke)能導(dao)致(zhi)芯片至部(bu)分開關管損壞。因(yin)此(ci)(ci),在蓄電(dian)池充電(dian)電(dian)路(lu)的(de)(de)設計中需(xu)要增加防回流(liu)(liu)措施(shi)。

公司概況 - 公司產品 - 熱點新聞
lutube-lutube下载-lutube下载地址-lutube最新地址 lutube-lutube下载-lutube下载地址-lutube最新地址 lutube-lutube下载-lutube下载地址-lutube最新地址