筆記本電(dian)池電(dian)量越用(yong)越少正常嗎 筆記本電(dian)池電(dian)量計量方法(fa)
筆記(ji)本(ben)電(dian)(dian)池電(dian)(dian)量越(yue)用(yong)越(yue)少正常嗎(ma)?要(yao)解釋這個(ge)問題,就得從電(dian)(dian)池的(de)自身結(jie)構談起(qi)。我(wo)們(men)之(zhi)前了(le)(le)解了(le)(le)電(dian)(dian)池的(de)基本(ben)結(jie)構,筆記(ji)本(ben)電(dian)(dian)池是(shi)(shi)由電(dian)(dian)芯(xin)和管理(li)(li)芯(xin)片構成(cheng)的(de)。電(dian)(dian)芯(xin)是(shi)(shi)電(dian)(dian)量的(de)存儲“倉庫”,管理(li)(li)芯(xin)片則能計算電(dian)(dian)量和管理(li)(li)充(chong)放電(dian)(dian)過程。電(dian)(dian)芯(xin)中起(qi)作用(yong)的(de)主要(yao)元素是(shi)(shi)鋰(li),這是(shi)(shi)一種(zhong)活躍的(de)元素,為(wei)了(le)(le)保障(zhang)安全,只能以(yi)離(li)子(zi)態存在(zai)在(zai)電(dian)(dian)池中。鋰(li)電(dian)(dian)池電(dian)(dian)芯(xin)外(wai)形跟普通電(dian)(dian)池差不多,但做(zuo)筆記(ji)本(ben)電(dian)(dian)池時,往(wang)往(wang)是(shi)(shi)成(cheng)組出現的(de)。我(wo)們(men)常看(kan)到的(de)“四芯(xin)”、“六芯(xin)”電(dian)(dian)池就是(shi)(shi)指電(dian)(dian)池里的(de)電(dian)(dian)芯(xin)數。
電(dian)(dian)(dian)(dian)芯(xin)多,意味著(zhu)容量(liang)也大,高容電(dian)(dian)(dian)(dian)池(chi)的(de)電(dian)(dian)(dian)(dian)芯(xin)數量(liang)一般都(dou)在八個左(zuo)右。之所以談到電(dian)(dian)(dian)(dian)芯(xin)組,是(shi)因為成組的(de)電(dian)(dian)(dian)(dian)芯(xin)正是(shi)導致電(dian)(dian)(dian)(dian)池(chi)電(dian)(dian)(dian)(dian)量(liang)減少(shao)的(de)“罪魁禍(huo)首”。電(dian)(dian)(dian)(dian)芯(xin)組中的(de)各個電(dian)(dian)(dian)(dian)芯(xin),其品質和放(fang)電(dian)(dian)(dian)(dian)水平不盡(jin)相同。在放(fang)電(dian)(dian)(dian)(dian)以后,為了(le)保持(chi)電(dian)(dian)(dian)(dian)壓穩定,管理芯(xin)片會(hui)(hui)檢測到最差的(de)那一個電(dian)(dian)(dian)(dian)芯(xin)進行(xing)充電(dian)(dian)(dian)(dian)保護。常(chang)此以往,整個電(dian)(dian)(dian)(dian)池(chi)的(de)電(dian)(dian)(dian)(dian)量(liang)自然會(hui)(hui)逐漸減少(shao)。出現這種現象后就(jiu)可以使用電(dian)(dian)(dian)(dian)池(chi)校正的(de)功(gong)能了(le),這個功(gong)能可以平衡多節(jie)電(dian)(dian)(dian)(dian)池(chi)所負擔的(de)“工作”。
在這里應該提一下電池電量的計量方(fang)(fang)式,常見(jian)的方(fang)(fang)法(fa)(fa)有4種(zhong),但一般來說都(dou)是綜(zong)合幾種(zhong)方(fang)(fang)法(fa)(fa)使用(yong),以(yi)其(qi)中(zhong)一種(zhong)為主(zhu)要計算(suan)方(fang)(fang)法(fa)(fa),其(qi)余輔(fu)助計算(suan)的方(fang)(fang)式實現(xian)電量計算(suan)、管(guan)理。
開路電壓測量法
這種方(fang)法是通過測量(liang)電池(chi)(chi)在靜止(zhi)(zhi)狀(zhuang)態(tai)下的(de)電壓數值來(lai)計(ji)算(suan)電池(chi)(chi)的(de)剩(sheng)余容(rong)量(liang),不(bu)過由(you)于鋰離子電池(chi)(chi)的(de)靜止(zhi)(zhi)時(shi)電壓與剩(sheng)余容(rong)量(liang)間的(de)關系屬(shu)于非線性,因(yin)此這種方(fang)法的(de)測量(liang)值并不(bu)準確,絕大部(bu)分手機電池(chi)(chi)都采(cai)用這種計(ji)算(suan)方(fang)法。
庫侖計算法
該(gai)方(fang)法(fa)是通過(guo)測(ce)量(liang)電(dian)(dian)池充電(dian)(dian)和放(fang)電(dian)(dian)的(de)電(dian)(dian)流,將電(dian)(dian)流值與時間(jian)值的(de)乘積進行積分后(hou)計算得到電(dian)(dian)池所(suo)充進的(de)電(dian)(dian)量(liang)和所(suo)放(fang)出的(de)電(dian)(dian)量(liang),庫(ku)侖計算法(fa)是一種較為精確的(de)電(dian)(dian)量(liang)計算方(fang)法(fa)。
阻抗測量法
它通過測(ce)量電(dian)池(chi)內阻(zu)值得到電(dian)池(chi)的(de)剩余容(rong)量值。
綜合查表法
通過設置一個相關表,將(jiang)電(dian)壓(ya)、電(dian)流、溫度等參數輸入,就(jiu)可以查(cha)詢得到電(dian)池的剩余容量。
但不論哪種方法,在充(chong)電時管理芯片都(dou)遵循“木桶原(yuan)理”,以狀態(tai)最(zui)差(cha)的(de)電芯為準來進(jin)行(xing)保護。因此經常進(jin)行(xing)電池校正能在一定程度上保護電池、延(yan)長(chang)電池整體壽命(ming)。