本(ben)文設計了一種多功能、高效(xiao)、低功耗(hao)、安全的隨(sui)身移動電(dian)源，以(yi)滿(man)足戶外需求，將有很大(da)的實(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(zhong)，DC-DC升壓(ya)電(dian)(dian)(dian)(dian)(dian)路(lu)主要(yao)由MAX1771構成，該控(kong)制(zhi)(zhi)器采(cai)(cai)用(yong)獨特的(de)(de)(de)(de)控(kong)制(zhi)(zhi)方(fang)案，結合PFM（脈沖頻率(lv)(lv)調制(zhi)(zhi)）及PWM（脈沖寬度調制(zhi)(zhi)）的(de)(de)(de)(de)優越性，提供一(yi)個高效(xiao)(xiao)、較(jiao)(jiao)寬電(dian)(dian)(dian)(dian)(dian)壓(ya)調節范圍的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)源。前者具有(you)較(jiao)(jiao)小的(de)(de)(de)(de)靜(jing)態電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)，負載(zai)(zai)小的(de)(de)(de)(de)情(qing)況下(xia)效(xiao)(xiao)率(lv)(lv)較(jiao)(jiao)高，但紋波(bo)較(jiao)(jiao)大(da)。后(hou)者在(zai)負載(zai)(zai)大(da)的(de)(de)(de)(de)情(qing)況下(xia)具有(you)較(jiao)(jiao)高的(de)(de)(de)(de)效(xiao)(xiao)率(lv)(lv)，噪(zao)聲小。該控(kong)制(zhi)(zhi)器采(cai)(cai)用(yong)的(de)(de)(de)(de)是(shi)一(yi)種改進型的(de)(de)(de)(de)限流(liu)(liu)PFM控(kong)制(zhi)(zhi)方(fang)式，控(kong)制(zhi)(zhi)電(dian)(dian)(dian)(dian)(dian)路(lu)限制(zhi)(zhi)電(dian)(dian)(dian)(dian)(dian)感(gan)充電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)，使其不超過(guo)某一(yi)峰值電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)。既保持(chi)了(le)傳統PFM的(de)(de)(de)(de)低靜(jing)態電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)，同時(shi)在(zai)較(jiao)(jiao)大(da)負載(zai)(zai)的(de)(de)(de)(de)情(qing)況下(xia)，也具有(you)很高的(de)(de)(de)(de)效(xiao)(xiao)率(lv)(lv)。而(er)且由于限制(zhi)(zhi)了(le)峰值電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)，采(cai)(cai)用(yong)很小體積的(de)(de)(de)(de)外圍元件就可獲得滿(man)意(yi)的(de)(de)(de)(de)輸出紋波(bo)，這樣(yang)便于降低電(dian)(dian)(dian)(dian)(dian)路(lu)成本(ben)及尺(chi)寸。

　　如圖2所(suo)示，將4腳接(jie)(jie)地，可使其工作在閉環(huan)狀態(tai)。芯片由(you)引腳2上(shang)的電(dian)(dian)(dian)壓(ya)供電(dian)(dian)(dian)，同(tong)時(shi)也是輸出電(dian)(dian)(dian)壓(ya)。輸入電(dian)(dian)(dian)壓(ya)可以進行從2V到輸出電(dian)(dian)(dian)壓(ya)的變化。外(wai)接(jie)(jie)MOS管柵(zha)極1腳上(shang)的電(dian)(dian)(dian)壓(ya)，從輸出電(dian)(dian)(dian)平(ping)到零電(dian)(dian)(dian)平(ping)跳變，這樣可以提供更人的柵(zha)極驅動(dong)，從而(er)減(jian)小外(wai)接(jie)(jie)MOS管的開(kai)啟電(dian)(dian)(dian)阻。

　　MAX1771外(wai)接MOS管(guan)平時(shi)是關閉(bi)的(de)，此時(shi)電感儲能(neng)。關閉(bi)期(qi)間，MAX1771會檢測(ce)外(wai)部輸入電壓(ya)，一(yi)(yi)旦降低到了一(yi)(yi)定限度(du)，MAX1771就會開啟(qi)外(wai)部MOS管(guan)，電感釋放(fang)能(neng)量，重(zhong)新提供驅動(dong)電壓(ya)。開關頻率(lv)隨(sui)負載(zai)電流和輸入電壓(ya)而定。5V電壓(ya)通過兩個反饋電阻(zu)分壓(ya)得到。

　　此外，續(xu)流二極(ji)管(guan)選(xuan)用肖特基二極(ji)管(guan)SS34，該器件正向(xiang)導(dao)通電壓小，響應時(shi)間(jian)短。

鋰芯容量指示電路

　　本系統電(dian)(dian)路設計采用了(le)一種(zhong)比較簡單且實用的方(fang)法(fa)，即通過測(ce)試(shi)鋰芯電(dian)(dian)池放電(dian)(dian)的時間(jian)電(dian)(dian)壓特性曲線(xian)，選取(qu)整個(ge)放電(dian)(dian)過程的四個(ge)位點電(dian)(dian)壓，用電(dian)(dian)壓來估(gu)算電(dian)(dian)池的容(rong)量。

　　如圖3所(suo)示，當按(an)下電(dian)(dian)(dian)(dian)壓容量指示的(de)(de)功能按(an)鍵，鋰芯(xin)的(de)(de)電(dian)(dian)(dian)(dian)池(chi)(chi)(chi)電(dian)(dian)(dian)(dian)壓會加(jia)到XC61系(xi)列芯(xin)片的(de)(de)VIN與VSS引腳上。當電(dian)(dian)(dian)(dian)壓高丁4.1V，四(si)(si)個(ge)(ge)芯(xin)片同時(shi)工(gong)作，電(dian)(dian)(dian)(dian)池(chi)(chi)(chi)與限流(liu)電(dian)(dian)(dian)(dian)阻、LED發(fa)光(guang)管形(xing)(xing)成四(si)(si)個(ge)(ge)回路。此時(shi)四(si)(si)個(ge)(ge)發(fa)光(guang)管同時(shi)發(fa)亮，表(biao)示電(dian)(dian)(dian)(dian)池(chi)(chi)(chi)容量飽和。當電(dian)(dian)(dian)(dian)池(chi)(chi)(chi)電(dian)(dian)(dian)(dian)壓在4.1V～3.8V之間(jian)，只(zhi)有三(san)個(ge)(ge)芯(xin)片工(gong)作，4102不工(gong)作，此時(shi)形(xing)(xing)成三(san)個(ge)(ge)回路，三(san)個(ge)(ge)發(fa)光(guang)管發(fa)亮，表(biao)示電(dian)(dian)(dian)(dian)池(chi)(chi)(chi)容量有所(suo)下降。同理可知其(qi)它的(de)(de)兩種情況。

鋰芯保護電路

　　如圖1所示，電芯保(bao)護電路主要(yao)由R5402和HAT2027共(gong)同組成。除(chu)此之外，自(zi)恢復保(bao)險絲起到了(le)最后一層保(bao)護的作(zuo)用(yong)。

　　R5402是(shi)一種高精度、基于CMOS的(de)鋰芯電(dian)(dian)池電(dian)(dian)壓保(bao)護芯片。HAT2027是(shi)具有電(dian)(dian)流(liu)流(liu)通方向(xiang)可調的(de)雙MOS產品(pin)。

　　充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)時，電(dian)(dian)(dian)(dian)池(chi)(chi)電(dian)(dian)(dian)(dian)壓(ya)從低到高上升，當電(dian)(dian)(dian)(dian)池(chi)(chi)電(dian)(dian)(dian)(dian)壓(ya)大于4.25V時，充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)狀態被鎖(suo)(suo)存(cun)，引腳COUT就(jiu)會從高電(dian)(dian)(dian)(dian)平跳為低電(dian)(dian)(dian)(dian)平，HAT2027內置(zhi)二極管發揮單(dan)向導(dao)通(tong)作(zuo)用。電(dian)(dian)(dian)(dian)流方向只能從1腳到3腳，充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)源(yuan)無法繼續(xu)(xu)給鋰芯(xin)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)。如果充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)源(yuan)繼續(xu)(xu)加載在(zai)鋰芯(xin)電(dian)(dian)(dian)(dian)池(chi)(chi)組(zu)兩端，即(ji)使鋰芯(xin)電(dian)(dian)(dian)(dian)壓(ya)在(zai)4.25V以下，R5402具有(you)的過(guo)充(chong)(chong)(chong)鎖(suo)(suo)存(cun)狀態也不會被釋放(fang)。這樣(yang)就(jiu)保證(zheng)了電(dian)(dian)(dian)(dian)池(chi)(chi)組(zu)在(zai)連續(xu)(xu)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)飽和之后，能鎖(suo)(suo)存(cun)在(zai)過(guo)充(chong)(chong)(chong)狀態，隔離充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)源(yuan)對高能量電(dian)(dian)(dian)(dian)池(chi)(chi)組(zu)持續(xu)(xu)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)。只有(you)當過(guo)充(chong)(chong)(chong)時，斷開充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)源(yuan)，過(guo)充(chong)(chong)(chong)鎖(suo)(suo)存(cun)狀態才會被釋放(fang)，COUT重新變為高電(dian)(dian)(dian)(dian)平，HAT2027的1、3引腳此時雙向導(dao)通(tong)，鋰芯(xin)才能正(zheng)常工作(zuo)。

　　放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)(dian)時(shi)(shi)(shi)，電(dian)(dian)(dian)(dian)(dian)(dian)池(chi)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)下降，當小于2.3V時(shi)(shi)(shi)，放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)(dian)狀態被(bei)鎖存(cun)(cun)，引腳DOUT的輸出從(cong)高(gao)電(dian)(dian)(dian)(dian)(dian)(dian)平(ping)跳為低(di)電(dian)(dian)(dian)(dian)(dian)(dian)平(ping)，HAT2027內(nei)置(zhi)二極管發(fa)揮(hui)單(dan)向導通作用(yong)。電(dian)(dian)(dian)(dian)(dian)(dian)流方向只能(neng)從(cong)3腳到1腳，鋰(li)芯電(dian)(dian)(dian)(dian)(dian)(dian)池(chi)組(zu)(zu)無法繼續給負載放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)(dian)。如果沒有(you)接上充電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)源，即使(shi)鋰(li)芯電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)高(gao)于過(guo)放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)的最大(da)值，放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)(dian)鎖存(cun)(cun)狀態也(ye)不會(hui)被(bei)釋(shi)放(fang)(fang)(fang)，這就保(bao)證了電(dian)(dian)(dian)(dian)(dian)(dian)池(chi)組(zu)(zu)在經(jing)過(guo)長(chang)時(shi)(shi)(shi)間(jian)放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)(dian)，電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)下降到2.3V之后，能(neng)鎖存(cun)(cun)在過(guo)放(fang)(fang)(fang)狀態，隔(ge)離低(di)能(neng)量電(dian)(dian)(dian)(dian)(dian)(dian)池(chi)組(zu)(zu)持(chi)續放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)(dian)。只有(you)當過(guo)放(fang)(fang)(fang)時(shi)(shi)(shi)，接上充電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)源，鋰(li)芯電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)開始高(gao)于過(guo)放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)時(shi)(shi)(shi)，過(guo)放(fang)(fang)(fang)鎖存(cun)(cun)狀態才會(hui)被(bei)釋(shi)放(fang)(fang)(fang)，同時(shi)(shi)(shi)引腳DOUT的電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)重新(xin)變為高(gao)電(dian)(dian)(dian)(dian)(dian)(dian)平(ping)，HAT2027的1、3引腳雙向導通，鋰(li)芯既能(neng)工(gong)(gong)作在放(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)(dian)狀態，又能(neng)工(gong)(gong)作在充電(dian)(dian)(dian)(dian)(dian)(dian)狀態。

　　當(dang)鋰芯(xin)(xin)短(duan)(duan)(duan)路(lu)時(shi)(shi)，D。，跳到(dao)低電(dian)平。此時(shi)(shi)，鋰芯(xin)(xin)受HAT2027控(kong)制(zhi)無法放電(dian)，起到(dao)鋰芯(xin)(xin)保護作用(yong)。與此同(tong)時(shi)(shi)，自恢(hui)復保險絲由于短(duan)(duan)(duan)路(lu)的大電(dian)流，會受熱膨脹(zhang)，電(dian)路(lu)切斷，起到(dao)最(zui)后(hou)一(yi)層(ceng)保護的作用(yong)。當(dang)短(duan)(duan)(duan)路(lu)故障排(pai)除(chu)，白恢(hui)復保險絲恢(hui)復，R5402檢電(dian)器釋放，D。，，重新(xin)恢(hui)復高(gao)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電(dian)時，繼電(dian)器(qi)令CN3066開始工作，CN3066將整個充電(dian)管理過(guo)程分為四個部分，即預充電(dian)、恒流充電(dian)、恒壓充電(dian)以及維(wei)護充電(dian)。

　　當CN3066開始工作時，CN3066會檢(jian)測電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)是(shi)否(fou)較低，如果是(shi)，則采用涓流(liu)(liu)(liu)(liu)充(chong)(chong)(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)，即一個(ge)(ge)比較小(xiao)的(de)恒定電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)對電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)進(jin)行充(chong)(chong)(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)，直至電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)上升到一個(ge)(ge)安全值。之(zhi)(zhi)后，充(chong)(chong)(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)保持較大(da)(da)值不變(bian)，通(tong)常是(shi)涓流(liu)(liu)(liu)(liu)充(chong)(chong)(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)的(de)10倍或更大(da)(da)。1000mAh的(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)采用700mA電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)充(chong)(chong)(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)，這(zhe)可以(yi)避免(mian)大(da)(da)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)充(chong)(chong)(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)對鋰(li)(li)芯的(de)損(sun)壞。在(zai)(zai)恒流(liu)(liu)(liu)(liu)充(chong)(chong)(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)和涓流(liu)(liu)(liu)(liu)充(chong)(chong)(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)狀(zhuang)態(tai)(tai)(tai)下(xia)，充(chong)(chong)(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)管理芯片連(lian)續監控電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)的(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)，當單節(jie)鋰(li)(li)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)的(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)達到4.2V，恒流(liu)(liu)(liu)(liu)充(chong)(chong)(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)狀(zhuang)態(tai)(tai)(tai)結束(shu)，轉入恒壓(ya)充(chong)(chong)(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)狀(zhuang)態(tai)(tai)(tai)。在(zai)(zai)該(gai)狀(zhuang)態(tai)(tai)(tai)下(xia)，充(chong)(chong)(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)恒定在(zai)(zai)4.2V。當鋰(li)(li)芯的(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)下(xia)降(jiang)為原(yuan)來(lai)的(de)1／10之(zhi)(zhi)后，恒壓(ya)充(chong)(chong)(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)狀(zhuang)態(tai)(tai)(tai)結束(shu)。在(zai)(zai)維護(hu)充(chong)(chong)(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)狀(zhuang)態(tai)(tai)(tai)，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)充(chong)(chong)(chong)(chong)(chong)(chong)(chong)足電(dian)(dian)(dian)(dian)(dian)(dian)(dian)后，若移動電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)仍插在(zai)(zai)充(chong)(chong)(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器上，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)會由于自放電(dian)(dian)(dian)(dian)(dian)(dian)(dian)而損(sun)失電(dian)(dian)(dian)(dian)(dian)(dian)(dian)量。CN3066以(yi)非常小(xiao)的(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)對鋰(li)(li)芯充(chong)(chong)(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)或監測電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)位，以(yi)備對鋰(li)(li)芯再充(chong)(chong)(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)，這(zhe)種狀(zhuang)態(tai)(tai)(tai)稱為維護(hu)充(chong)(chong)(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)狀(zhuang)態(tai)(tai)(tai)。

　　在本電(dian)(dian)(dian)(dian)(dian)路中，CN3066會實(shi)時(shi)(shi)監測鋰(li)芯的(de)電(dian)(dian)(dian)(dian)(dian)壓(ya)、溫度(du)、充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)流和充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)時(shi)(shi)間。一旦(dan)電(dian)(dian)(dian)(dian)(dian)池的(de)溫度(du)達到(dao)60℃，或鋰(li)離子電(dian)(dian)(dian)(dian)(dian)池的(de)電(dian)(dian)(dian)(dian)(dian)壓(ya)達到(dao)4.2V，恒壓(ya)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)狀態自動終止。此外，還應設置(zhi)最長恒壓(ya)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)時(shi)(shi)間。在溫度(du)和電(dian)(dian)(dian)(dian)(dian)壓(ya)檢測失敗的(de)情(qing)況(kuang)下，可以保(bao)證(zheng)鋰(li)電(dian)(dian)(dian)(dian)(dian)池安全充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)。

　　當拔掉充電器，CN3066關(guan)閉，隨身電源處于預(yu)放電狀態。多功能(neng)擴展電路

高亮照明功能

　　戶外活動時，特別是夜間(jian)活動，需要一個高(gao)(gao)亮(liang)的光(guang)源。如圖(tu)5所示，夜行高(gao)(gao)亮(liang)照明(ming)系統(tong)，在USB輸(shu)出口可得到(dao)5V電壓，加上(shang)高(gao)(gao)亮(liang)發光(guang)二(er)極(ji)管(guan)(guan)和一個小的限流電阻(zu)共同(tong)組成。高(gao)(gao)亮(liang)管(guan)(guan)足夠5米內的照明(ming)光(guang)程(cheng)。

戶外報警功能

　　戶(hu)(hu)外出行，個人財(cai)物的防盜(dao)至關重要。安全可(ke)靠的報警系(xi)統有助于保障個人財(cai)物的安全，特別是(shi)戶(hu)(hu)外野營(ying)，靈敏的防盜(dao)措(cuo)施在(zai)夜間將發揮其巨大(da)功效。

　　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(tu)6所(suo)示，由(you)左邊555合成的振蕩頻率約為22KHz，再由(you)右邊555單(dan)穩態電路產生(sheng)一個50Hz，占(zhan)空(kong)比為50％的方波輸(shu)入左邊555的5腳，合成一種噪聲，用于驅趕蚊于。

　　電路測試

DC-DC電路測試

　　由圖7可見，移(yi)動電源(yuan)連續放電的總能(neng)量(liang)在2200mAh以上，輸(shu)出(chu)穩定。

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(shi)驗(yan)結果證明(ming)，多(duo)功能隨身電源(yuan)能對(dui)市面上大多(duo)數(shu)手機連續充電5次以(yi)上，對(dui)MP3、MP4充電12次以(yi)上，表明(ming)隨身電源(yuan)在(zai)戶外活動中有充足的能量儲備。

　　本系統方(fang)案設(she)計將多功(gong)(gong)能(neng)、低功(gong)(gong)耗(hao)、安全性、高容量、重(zhong)量輕等諸多特點(dian)整(zheng)合在一起，使整(zheng)個產品(pin)的(de)設(she)計符合實際使用要求，具有廣闊的(de)市場前景。

　　該方案科學縝密地排除了(le)(le)鋰芯在使用過程中出現的(de)各種安全隱(yin)患，與此(ci)同時，還巧妙地設計了(le)(le)幾個人(ren)性化(hua)的(de)功(gong)能(neng)模塊，滿足(zu)了(le)(le)戶(hu)外活動(dong)的(de)常見需求。