本文設計了(le)一(yi)種多功能(neng)、高效、低功耗(hao)、安全(quan)的(de)隨身移動電源，以(yi)滿足戶外需求，將有很大的(de)實(shi)用價值。

　　本文論述的電路系統設計由五部分組成：鋰芯容量指示電路、電芯保護電路、電充電管理路、DC-DC升壓電路和功能擴展電路。
多功能隨身電源的系統設計

　　鋰芯容量指示電路由XC61CC系列的電壓監控芯片組成。電芯保護電路由過充保護、過放保護、過溫保護三部分組成，HAT2027、R5402、自恢復保險絲構建了三重保護，使鋰芯安全性大大增強。充電管理電路采用了CN3066，將充電過程分為涓流充電、恒流充電、恒壓充電和維護充電四個部分，使移動隨身電源能夠最大程度地儲備能量。DC-DC升壓電路采用了MAX1771集成芯片，可將鋰芯容量在安全范圍內最大限度釋放，達到對多種數碼設備供電的目的。功能擴展涵蓋了戶外活動所涉及的常見需求，具有應急夜間高亮照、戶外防盜安全警報、野營驅蚊等功能。多功能隨身電源的電路實現
 

DC-DC升壓電路

　　本(ben)系統中，DC-DC升壓電(dian)(dian)路(lu)(lu)主(zhu)要由MAX1771構(gou)成，該控制(zhi)器(qi)采(cai)(cai)用(yong)獨特的(de)(de)(de)控制(zhi)方案，結合PFM（脈沖(chong)頻率(lv)調(diao)制(zhi)）及(ji)PWM（脈沖(chong)寬度調(diao)制(zhi)）的(de)(de)(de)優越性，提(ti)供(gong)一(yi)個高效、較寬電(dian)(dian)壓調(diao)節范圍的(de)(de)(de)電(dian)(dian)源。前(qian)者(zhe)具有較小(xiao)的(de)(de)(de)靜(jing)態電(dian)(dian)流(liu)(liu)，負(fu)載小(xiao)的(de)(de)(de)情況下(xia)效率(lv)較高，但紋波較大。后者(zhe)在負(fu)載大的(de)(de)(de)情況下(xia)具有較高的(de)(de)(de)效率(lv)，噪聲小(xiao)。該控制(zhi)器(qi)采(cai)(cai)用(yong)的(de)(de)(de)是一(yi)種改進型的(de)(de)(de)限流(liu)(liu)PFM控制(zhi)方式(shi)，控制(zhi)電(dian)(dian)路(lu)(lu)限制(zhi)電(dian)(dian)感充(chong)電(dian)(dian)電(dian)(dian)流(liu)(liu)，使其不超(chao)過某一(yi)峰值電(dian)(dian)流(liu)(liu)。既保持了(le)傳統PFM的(de)(de)(de)低靜(jing)態電(dian)(dian)流(liu)(liu)，同(tong)時在較大負(fu)載的(de)(de)(de)情況下(xia)，也具有很(hen)高的(de)(de)(de)效率(lv)。而且(qie)由于限制(zhi)了(le)峰值電(dian)(dian)流(liu)(liu)，采(cai)(cai)用(yong)很(hen)小(xiao)體積的(de)(de)(de)外圍元件就可獲得滿意(yi)的(de)(de)(de)輸出(chu)紋波，這樣便于降低電(dian)(dian)路(lu)(lu)成本(ben)及(ji)尺(chi)寸。

　　如(ru)圖2所示(shi)，將4腳(jiao)接(jie)地(di)，可使其工作(zuo)在(zai)閉環狀態。芯(xin)片由引(yin)腳(jiao)2上(shang)的(de)電(dian)壓供電(dian)，同(tong)時也是輸(shu)出(chu)電(dian)壓。輸(shu)入(ru)電(dian)壓可以進行(xing)從2V到輸(shu)出(chu)電(dian)壓的(de)變化。外接(jie)MOS管柵極(ji)1腳(jiao)上(shang)的(de)電(dian)壓，從輸(shu)出(chu)電(dian)平到零電(dian)平跳變，這樣可以提(ti)供更人的(de)柵極(ji)驅動，從而減小外接(jie)MOS管的(de)開啟(qi)電(dian)阻(zu)。

　　MAX1771外(wai)接MOS管(guan)(guan)平時(shi)是(shi)關閉(bi)的(de)，此時(shi)電(dian)(dian)感儲能(neng)。關閉(bi)期間，MAX1771會檢測外(wai)部輸入(ru)電(dian)(dian)壓(ya)(ya)，一(yi)旦降低到了一(yi)定限度，MAX1771就會開(kai)啟外(wai)部MOS管(guan)(guan)，電(dian)(dian)感釋放能(neng)量，重新(xin)提供驅動電(dian)(dian)壓(ya)(ya)。開(kai)關頻率(lv)隨負載電(dian)(dian)流(liu)和輸入(ru)電(dian)(dian)壓(ya)(ya)而(er)定。5V電(dian)(dian)壓(ya)(ya)通過兩個反饋電(dian)(dian)阻分壓(ya)(ya)得到。

　　此外，續流二極(ji)管(guan)選用肖(xiao)特(te)基二極(ji)管(guan)SS34，該器(qi)件正(zheng)向導通電壓小(xiao)，響應(ying)時(shi)間短。

鋰芯容量指示電路

　　本(ben)系統電(dian)路設計采用了一種比(bi)較簡單(dan)且(qie)實用的(de)方法，即通過測試鋰(li)芯電(dian)池(chi)放電(dian)的(de)時間電(dian)壓特性(xing)曲(qu)線，選取(qu)整個放電(dian)過程的(de)四個位點電(dian)壓，用電(dian)壓來估算(suan)電(dian)池(chi)的(de)容(rong)量。

　　如圖3所(suo)(suo)示(shi)(shi)，當(dang)按下電(dian)(dian)(dian)壓(ya)容量(liang)指示(shi)(shi)的(de)功能按鍵(jian)，鋰芯(xin)的(de)電(dian)(dian)(dian)池(chi)電(dian)(dian)(dian)壓(ya)會加到XC61系列芯(xin)片的(de)VIN與(yu)(yu)VSS引腳(jiao)上。當(dang)電(dian)(dian)(dian)壓(ya)高丁4.1V，四個(ge)芯(xin)片同時(shi)工(gong)作，電(dian)(dian)(dian)池(chi)與(yu)(yu)限流電(dian)(dian)(dian)阻、LED發(fa)光管(guan)形(xing)成四個(ge)回(hui)(hui)路。此(ci)(ci)時(shi)四個(ge)發(fa)光管(guan)同時(shi)發(fa)亮，表示(shi)(shi)電(dian)(dian)(dian)池(chi)容量(liang)飽(bao)和。當(dang)電(dian)(dian)(dian)池(chi)電(dian)(dian)(dian)壓(ya)在4.1V～3.8V之(zhi)間(jian)，只有三個(ge)芯(xin)片工(gong)作，4102不(bu)工(gong)作，此(ci)(ci)時(shi)形(xing)成三個(ge)回(hui)(hui)路，三個(ge)發(fa)光管(guan)發(fa)亮，表示(shi)(shi)電(dian)(dian)(dian)池(chi)容量(liang)有所(suo)(suo)下降。同理(li)可知其它的(de)兩種情況。

鋰芯保護電路

　　如圖1所示，電芯保護(hu)電路(lu)主要由R5402和(he)HAT2027共同組成。除此之外，自(zi)恢復(fu)保險絲起到(dao)了最(zui)后一層保護(hu)的(de)作用。

　　R5402是(shi)一(yi)種高精度、基于CMOS的鋰芯電(dian)(dian)池電(dian)(dian)壓(ya)保護芯片。HAT2027是(shi)具有電(dian)(dian)流(liu)(liu)流(liu)(liu)通(tong)方向可調的雙MOS產品。

　　充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)時，電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)電(dian)(dian)(dian)(dian)(dian)壓從(cong)(cong)低到高(gao)上升，當電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)電(dian)(dian)(dian)(dian)(dian)壓大于4.25V時，充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)狀(zhuang)態(tai)被鎖存(cun)，引腳(jiao)COUT就(jiu)會(hui)從(cong)(cong)高(gao)電(dian)(dian)(dian)(dian)(dian)平跳為低電(dian)(dian)(dian)(dian)(dian)平，HAT2027內置二極管發揮(hui)單(dan)向(xiang)導(dao)通作(zuo)用。電(dian)(dian)(dian)(dian)(dian)流方(fang)向(xiang)只(zhi)能(neng)從(cong)(cong)1腳(jiao)到3腳(jiao)，充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)源(yuan)無(wu)法(fa)繼(ji)續(xu)給鋰芯(xin)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)。如果充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)源(yuan)繼(ji)續(xu)加載在鋰芯(xin)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)組(zu)兩(liang)端，即使鋰芯(xin)電(dian)(dian)(dian)(dian)(dian)壓在4.25V以(yi)下，R5402具有(you)的過(guo)充(chong)(chong)(chong)鎖存(cun)狀(zhuang)態(tai)也不會(hui)被釋(shi)放。這樣(yang)就(jiu)保證了電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)組(zu)在連續(xu)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)飽(bao)和之后(hou)，能(neng)鎖存(cun)在過(guo)充(chong)(chong)(chong)狀(zhuang)態(tai)，隔離充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)源(yuan)對高(gao)能(neng)量電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)組(zu)持(chi)續(xu)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)。只(zhi)有(you)當過(guo)充(chong)(chong)(chong)時，斷開充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)源(yuan)，過(guo)充(chong)(chong)(chong)鎖存(cun)狀(zhuang)態(tai)才會(hui)被釋(shi)放，COUT重(zhong)新變為高(gao)電(dian)(dian)(dian)(dian)(dian)平，HAT2027的1、3引腳(jiao)此時雙向(xiang)導(dao)通，鋰芯(xin)才能(neng)正常工作(zuo)。

　　放(fang)(fang)(fang)(fang)(fang)電(dian)(dian)(dian)(dian)時，電(dian)(dian)(dian)(dian)池電(dian)(dian)(dian)(dian)壓下降(jiang)，當小(xiao)于2.3V時，放(fang)(fang)(fang)(fang)(fang)電(dian)(dian)(dian)(dian)狀態被鎖存(cun)，引(yin)腳(jiao)(jiao)(jiao)DOUT的輸(shu)出(chu)從(cong)高(gao)電(dian)(dian)(dian)(dian)平跳為低(di)電(dian)(dian)(dian)(dian)平，HAT2027內置二極管(guan)發(fa)揮單向(xiang)(xiang)導通(tong)作用。電(dian)(dian)(dian)(dian)流方向(xiang)(xiang)只(zhi)(zhi)能(neng)從(cong)3腳(jiao)(jiao)(jiao)到1腳(jiao)(jiao)(jiao)，鋰(li)芯(xin)電(dian)(dian)(dian)(dian)池組(zu)無法繼續給負(fu)載(zai)放(fang)(fang)(fang)(fang)(fang)電(dian)(dian)(dian)(dian)。如果沒有接(jie)上充(chong)(chong)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)源，即使鋰(li)芯(xin)電(dian)(dian)(dian)(dian)壓高(gao)于過放(fang)(fang)(fang)(fang)(fang)電(dian)(dian)(dian)(dian)壓的最大值，放(fang)(fang)(fang)(fang)(fang)電(dian)(dian)(dian)(dian)鎖存(cun)狀態也不會被釋(shi)放(fang)(fang)(fang)(fang)(fang)，這就保證(zheng)了(le)電(dian)(dian)(dian)(dian)池組(zu)在(zai)(zai)經過長時間放(fang)(fang)(fang)(fang)(fang)電(dian)(dian)(dian)(dian)，電(dian)(dian)(dian)(dian)壓下降(jiang)到2.3V之后，能(neng)鎖存(cun)在(zai)(zai)過放(fang)(fang)(fang)(fang)(fang)狀態，隔(ge)離低(di)能(neng)量電(dian)(dian)(dian)(dian)池組(zu)持續放(fang)(fang)(fang)(fang)(fang)電(dian)(dian)(dian)(dian)。只(zhi)(zhi)有當過放(fang)(fang)(fang)(fang)(fang)時，接(jie)上充(chong)(chong)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)源，鋰(li)芯(xin)電(dian)(dian)(dian)(dian)壓開始高(gao)于過放(fang)(fang)(fang)(fang)(fang)電(dian)(dian)(dian)(dian)壓時，過放(fang)(fang)(fang)(fang)(fang)鎖存(cun)狀態才會被釋(shi)放(fang)(fang)(fang)(fang)(fang)，同(tong)時引(yin)腳(jiao)(jiao)(jiao)DOUT的電(dian)(dian)(dian)(dian)壓重(zhong)新(xin)變為高(gao)電(dian)(dian)(dian)(dian)平，HAT2027的1、3引(yin)腳(jiao)(jiao)(jiao)雙(shuang)向(xiang)(xiang)導通(tong)，鋰(li)芯(xin)既能(neng)工作在(zai)(zai)放(fang)(fang)(fang)(fang)(fang)電(dian)(dian)(dian)(dian)狀態，又能(neng)工作在(zai)(zai)充(chong)(chong)電(dian)(dian)(dian)(dian)狀態。

　　當(dang)鋰(li)芯(xin)短(duan)路(lu)時(shi)，D。，跳到(dao)(dao)低電(dian)平。此時(shi)，鋰(li)芯(xin)受(shou)HAT2027控制無法放電(dian)，起到(dao)(dao)鋰(li)芯(xin)保(bao)(bao)護作(zuo)用。與(yu)此同時(shi)，自(zi)恢復保(bao)(bao)險(xian)絲(si)由于短(duan)路(lu)的大(da)電(dian)流，會受(shou)熱膨脹(zhang)，電(dian)路(lu)切斷，起到(dao)(dao)最后一層保(bao)(bao)護的作(zuo)用。當(dang)短(duan)路(lu)故障(zhang)排除，白恢復保(bao)(bao)險(xian)絲(si)恢復，R5402檢(jian)電(dian)器釋放，D。，，重新恢復高電(dian)平。

　　該電路還增設了“休眠”的功能。當電路工作在過放狀態，補充電流將會保持非常低的值，從而停止內部電路的工作，使低能量的鋰芯不會被R5402和系統后級回路繼續消耗能量。該電路還具有瞬時監控功能。在鋰芯負極取一個電壓接到R5402的V引腳，內置檢電器的延時可以減少大概1／57秒。因此，可以監測電池容量瞬時狀態。
 

充電管理電路

　　充電管理電路由CN3066和繼電器構成，如圖4所示。當隨身電源監測到有充電器對其充(chong)(chong)電(dian)時(shi)，繼電(dian)器令CN3066開始(shi)工作，CN3066將整個(ge)(ge)充(chong)(chong)電(dian)管理(li)過(guo)程分為四個(ge)(ge)部(bu)分，即預充(chong)(chong)電(dian)、恒流充(chong)(chong)電(dian)、恒壓充(chong)(chong)電(dian)以及維護充(chong)(chong)電(dian)。

　　當(dang)CN3066開始工作(zuo)時，CN3066會(hui)檢測(ce)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)是(shi)否較低，如(ru)果(guo)是(shi)，則采(cai)用涓流(liu)(liu)(liu)(liu)充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，即一個比(bi)較小(xiao)的(de)(de)(de)恒(heng)定電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)對電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)進(jin)行充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，直(zhi)至(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)上升到一個安全值。之后(hou)，充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)保持較大(da)值不變(bian)，通常是(shi)涓流(liu)(liu)(liu)(liu)充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)的(de)(de)(de)10倍或更大(da)。1000mAh的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)采(cai)用700mA電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，這(zhe)可(ke)以避免大(da)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)對鋰(li)芯的(de)(de)(de)損壞(huai)。在(zai)恒(heng)流(liu)(liu)(liu)(liu)充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)和涓流(liu)(liu)(liu)(liu)充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)狀(zhuang)(zhuang)(zhuang)態(tai)(tai)下(xia)，充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)管理芯片(pian)連續監(jian)(jian)控電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)，當(dang)單(dan)節鋰(li)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)達到4.2V，恒(heng)流(liu)(liu)(liu)(liu)充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)狀(zhuang)(zhuang)(zhuang)態(tai)(tai)結束(shu)，轉入(ru)恒(heng)壓(ya)充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)狀(zhuang)(zhuang)(zhuang)態(tai)(tai)。在(zai)該狀(zhuang)(zhuang)(zhuang)態(tai)(tai)下(xia)，充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)恒(heng)定在(zai)4.2V。當(dang)鋰(li)芯的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)下(xia)降為原來的(de)(de)(de)1／10之后(hou)，恒(heng)壓(ya)充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)狀(zhuang)(zhuang)(zhuang)態(tai)(tai)結束(shu)。在(zai)維護充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)狀(zhuang)(zhuang)(zhuang)態(tai)(tai)，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)充(chong)(chong)(chong)(chong)足(zu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)后(hou)，若移動電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源仍(reng)插在(zai)充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器上，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)會(hui)由于自放電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)而損失電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)量。CN3066以非常小(xiao)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)對鋰(li)芯充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)或監(jian)(jian)測(ce)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)位，以備(bei)對鋰(li)芯再充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，這(zhe)種(zhong)狀(zhuang)(zhuang)(zhuang)態(tai)(tai)稱為維護充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)狀(zhuang)(zhuang)(zhuang)態(tai)(tai)。

　　在本(ben)電(dian)(dian)(dian)(dian)路中，CN3066會實時(shi)(shi)監測鋰芯(xin)的電(dian)(dian)(dian)(dian)壓(ya)、溫(wen)度(du)、充(chong)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)流和充(chong)電(dian)(dian)(dian)(dian)時(shi)(shi)間。一旦電(dian)(dian)(dian)(dian)池的溫(wen)度(du)達到60℃，或鋰離子電(dian)(dian)(dian)(dian)池的電(dian)(dian)(dian)(dian)壓(ya)達到4.2V，恒壓(ya)充(chong)電(dian)(dian)(dian)(dian)狀態自動終止(zhi)。此(ci)外，還應設置最(zui)長恒壓(ya)充(chong)電(dian)(dian)(dian)(dian)時(shi)(shi)間。在溫(wen)度(du)和電(dian)(dian)(dian)(dian)壓(ya)檢測失敗的情況下，可以保(bao)證鋰電(dian)(dian)(dian)(dian)池安(an)全充(chong)電(dian)(dian)(dian)(dian)。

　　當拔掉充電器，CN3066關閉，隨身電源處(chu)于預放電狀態。多功能擴展電路

高亮照明功能

　　戶外活動(dong)時，特別(bie)是夜間(jian)活動(dong)，需要一(yi)個高(gao)亮的(de)光(guang)源。如圖(tu)5所示，夜行高(gao)亮照明(ming)系統，在USB輸出口可得(de)到5V電(dian)壓，加(jia)上高(gao)亮發光(guang)二極管和一(yi)個小的(de)限流電(dian)阻共(gong)同組成(cheng)。高(gao)亮管足(zu)夠5米(mi)內的(de)照明(ming)光(guang)程。

戶外報警功能

　　戶(hu)外出(chu)行，個人財(cai)物的防盜至關(guan)重要(yao)。安全可靠的報警(jing)系統有助于保障(zhang)個人財(cai)物的安全，特(te)別是戶(hu)外野營，靈敏的防盜措施在夜間將(jiang)發揮(hui)其巨大(da)功(gong)效。

　　如圖5所示，當按下預報警功能鍵時，USB輸出電壓加載在報警系統上，此時移動隨身電源處于“預報警”狀態。當水銀開關B1位置偏移正常的斷開位置，將觸發繼電器工作，使KD9561音樂片工作，發出報警響聲，提醒注意安全。
 

 野外驅蚊功能

　　如圖6所示，由左邊555合成的振蕩頻率約(yue)為22KHz，再由右(you)邊555單穩態電路產(chan)生一(yi)個50Hz，占(zhan)空比為50％的方波輸入左邊555的5腳，合成一(yi)種噪(zao)聲，用于驅趕蚊于。

　　電路測試

DC-DC電路測試

　　由(you)圖7可見，移(yi)動電(dian)(dian)源連續放電(dian)(dian)的總能量在2200mAh以上，輸(shu)出穩(wen)定。

擴展功能模塊的測試

　　夜行高亮燈管的有效光程為6米。報警系統能夠正常工作。驅蚊系統發出21KHz的噪聲，對蚊子具有明顯的驅趕作用。
總體測試

　　實驗結(jie)果證明，多功能(neng)(neng)隨身電(dian)源能(neng)(neng)對市面上(shang)大(da)多數手(shou)機連續充(chong)電(dian)5次(ci)以上(shang)，對MP3、MP4充(chong)電(dian)12次(ci)以上(shang)，表明隨身電(dian)源在戶外活動中有充(chong)足的能(neng)(neng)量儲備。

　　本(ben)系統方案設計將多功(gong)能、低功(gong)耗(hao)、安全(quan)性、高容量(liang)、重量(liang)輕等諸多特點整合在(zai)一起，使(shi)整個產品的設計符合實際(ji)使(shi)用(yong)要求，具(ju)有廣闊(kuo)的市場前景。

　　該(gai)方案科學縝密(mi)地排(pai)除了(le)(le)鋰芯在使用過程中出現(xian)的(de)各種(zhong)安全隱患，與此同時，還巧(qiao)妙地設計了(le)(le)幾個人性(xing)化的(de)功能模(mo)塊，滿(man)足了(le)(le)戶外(wai)活動的(de)常見需求。