鉛(qian)(qian)酸電(dian)(dian)池成(cheng)本低、技術成(cheng)熟、使用(yong)性能(neng)穩(wen)定、原料來源豐富(fu)、鉛(qian)(qian)回收率高成(cheng)為各電(dian)(dian)動車生(sheng)產商的首選，與鉛(qian)(qian)酸電(dian)(dian)池相(xiang)對應(ying)的充電(dian)(dian)器也繁榮(rong)于市場。

　　目(mu)前市場上電(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)車鉛酸(suan)(suan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)的(de)(de)(de)設計方案(an)大(da)致(zhi)有兩類：第一(yi)類是(shi)二(er)階(jie)段式(shi)，即先恒壓(ya)(ya)充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)，充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流隨鉛酸(suan)(suan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)上升而逐漸減少（即充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流先大(da)后(hou)(hou)小），當鉛酸(suan)(suan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)能補充(chong)(chong)(chong)(chong)到一(yi)定程(cheng)度(du)后(hou)(hou)，鉛酸(suan)(suan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)也(ye)會上升至(zhi)充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)的(de)(de)(de)設定值，充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)的(de)(de)(de)紅色指(zhi)(zhi)示二(er)極(ji)(ji)管(guan)熄(xi)滅，綠(lv)色指(zhi)(zhi)示二(er)極(ji)(ji)管(guan)隨即點亮，充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)自動(dong)轉(zhuan)入第二(er)階(jie)段的(de)(de)(de)涓電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流浮充(chong)(chong)(chong)(chong)充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)；第二(er)類是(shi)三階(jie)段式(shi)，即先恒流充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)，而后(hou)(hou)恒壓(ya)(ya)充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)，當鉛酸(suan)(suan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)上升至(zhi)充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)的(de)(de)(de)設定值，充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)的(de)(de)(de)紅色指(zhi)(zhi)示二(er)極(ji)(ji)管(guan)熄(xi)滅，綠(lv)色指(zhi)(zhi)示二(er)極(ji)(ji)管(guan)隨即點亮，充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)自動(dong)轉(zhuan)入第三階(jie)段的(de)(de)(de)涓電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流浮充(chong)(chong)(chong)(chong)充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)。

　　從以(yi)上(shang)設(she)計方案可知：無論是兩(liang)階(jie)(jie)段式充(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)還是三階(jie)(jie)段式充(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，最(zui)后階(jie)(jie)段都(dou)是涓(juan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流浮充(chong)(chong)(chong)(chong)(chong)充(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)。實踐證(zheng)(zheng)明：對(dui)鉛(qian)酸(suan)(suan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)適當(dang)時(shi)間的(de)(de)涓(juan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流浮充(chong)(chong)(chong)(chong)(chong)充(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，不僅是更進一(yi)步充(chong)(chong)(chong)(chong)(chong)足電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)量，更重(zhong)要的(de)(de)是對(dui)鉛(qian)酸(suan)(suan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)的(de)(de)修復和保(bao)養，防止(zhi)鉛(qian)酸(suan)(suan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)形成不可逆(ni)的(de)(de)硫(liu)酸(suan)(suan)鹽(yan)化(hua)，簡稱“硫(liu)化(hua)”。實踐驗證(zheng)(zheng)，一(yi)般以(yi) 2~3小時(shi)的(de)(de)涓(juan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流浮充(chong)(chong)(chong)(chong)(chong)充(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)為(wei)宜，過充(chong)(chong)(chong)(chong)(chong)或充(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)不足都(dou)會嚴重(zhong)危害(hai)鉛(qian)酸(suan)(suan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)的(de)(de)正(zheng)極板，大(da)大(da)縮短鉛(qian)酸(suan)(suan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)的(de)(de)使用(yong)壽命(ming)。筆者針(zhen)對(dui)以(yi)上(shang)充(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)情況，自制了一(yi)款簡易的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)動車(che)鉛(qian)酸(suan)(suan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)充(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)智(zhi)能定(ding)(ding)時(shi)插(cha)(cha)(cha)座，該智(zhi)能定(ding)(ding)時(shi)插(cha)(cha)(cha)座能對(dui)充(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)最(zui)后階(jie)(jie)段涓(juan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流浮充(chong)(chong)(chong)(chong)(chong)進行定(ding)(ding)時(shi)，當(dang)涓(juan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流浮充(chong)(chong)(chong)(chong)(chong)到達(da)設(she)定(ding)(ding)值后，智(zhi)能定(ding)(ding)時(shi)插(cha)(cha)(cha)座自動切(qie)斷(duan)(duan)充(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)及自身(shen)的(de)(de)交流電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源，結束充(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，不必再人(ren)(ren)工(gong)斷(duan)(duan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)。本人(ren)(ren)將智(zhi)能定(ding)(ding)時(shi)插(cha)(cha)(cha)座應用(yong)于自己森地牌YBC-48L型（14Ah）充(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)，深感方便。隨(sui)后相繼給許多親戚朋友(you)的(de)(de)充(chong)(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)也(ye)設(she)計制作了同(tong)樣的(de)(de)定(ding)(ding)時(shi)插(cha)(cha)(cha)座，通過使用(yong)，大(da)家(jia)都(dou)覺得(de)既延長鉛(qian)酸(suan)(suan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)的(de)(de)使用(yong)壽命(ming)，也(ye)免(mian)除了天天人(ren)(ren)工(gong)斷(duan)(duan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)之苦。

　　一、智能充電器定時插座(zuo)如何(he)工作(zuo)

　　智能定(ding)(ding)時插座的(de)電(dian)(dian)(dian)路(lu)(lu)見圖1，共由(you)交(jiao)流(liu)(liu)電(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)開關、電(dian)(dian)(dian)磁(ci)脫鉤線圈(quan)驅(qu)動電(dian)(dian)(dian)路(lu)(lu)、定(ding)(ding)時電(dian)(dian)(dian)路(lu)(lu)、直流(liu)(liu)電(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)電(dian)(dian)(dian)路(lu)(lu)4部(bu)分組成(cheng)。將(jiang)該(gai)電(dian)(dian)(dian)路(lu)(lu)插上電(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)插頭，按(an)(an)下(xia)交(jiao)流(liu)(liu)電(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)開關S1按(an)(an)鈕，接(jie)通220V交(jiao)流(liu)(liu)電(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)即可(ke)(ke)開始工作。220V交(jiao)流(liu)(liu)電(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)一(yi)路(lu)(lu)經(jing)14V電(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)變壓器T降壓、橋(qiao)式整(zheng)流(liu)(liu)電(dian)(dian)(dian)路(lu)(lu)整(zheng)流(liu)(liu)、濾(lv)(lv)(lv)波電(dian)(dian)(dian)容 C1濾(lv)(lv)(lv)波、三端穩(wen)壓集成(cheng)電(dian)(dian)(dian)路(lu)(lu)IC1穩(wen)壓、濾(lv)(lv)(lv)波電(dian)(dian)(dian)容C2濾(lv)(lv)(lv)波產生(sheng)穩(wen)定(ding)(ding)的(de)+12V直流(liu)(liu)電(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)，該(gai)+12V分三路(lu)(lu)輸出：（1）經(jing)R4加到(dao)LED2作+12V直流(liu)(liu)電(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)工作指示(shi)(shi)。（2）經(jing)R3、VD2、LED3串(chuan)聯穩(wen)壓后經(jing)C3濾(lv)(lv)(lv)波加到(dao)穩(wen)壓調整(zheng)管VT4基極，使(shi)VT4將(jiang)+12V穩(wen)壓為(wei)(wei)2.1V，由(you)VT4發射極輸出，該(gai) 2.1V經(jing)C4濾(lv)(lv)(lv)波后加到(dao)石英小鬧(nao)鐘(zhong)電(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)正負極為(wei)(wei)其提供直流(liu)(liu)電(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)（提示(shi)(shi)一(yi)點：2.1V高了些(xie)，石英小鬧(nao)鐘(zhong)走時稍快一(yi)些(xie)，定(ding)(ding)時值按(an)(an)4~5小時即可(ke)(ke)）。（3）加到(dao)開關S1的(de)電(dian)(dian)(dian)磁(ci)脫鉤線圈(quan)上。

　　220V交流電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)另一路經(jing)定時(shi)插(cha)座加到(dao)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)器，當(dang)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)器還未轉入浮充(chong)(chong)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)狀態時(shi)，充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)器的紅(hong)燈LED1得電(dian)(dian)(dian)(dian)(dian)(dian)發(fa)光，LED1兩端(duan)的2V電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)經(jing)插(cha)頭 P1、插(cha)孔J1、電(dian)(dian)(dian)(dian)(dian)(dian)阻R2加到(dao)VT3基極(ji)，VT3飽和導(dao)通，將2.1V穩壓(ya)(ya)調(diao)整管(guan)(guan)VT4基極(ji)短(duan)路到(dao)地，穩壓(ya)(ya)調(diao)整管(guan)(guan)VT4截(jie)止(zhi)，石英小(xiao)鬧鐘(zhong)(zhong)無直(zhi)流電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)供(gong)給(gei)而不工作(zuo)，當(dang)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)器轉入涓電(dian)(dian)(dian)(dian)(dian)(dian)流浮充(chong)(chong)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)階段(duan)時(shi)，充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)器紅(hong)色(se)二極(ji)管(guan)(guan)LED1兩端(duan)變為(wei)零(ling)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)熄滅(mie)（充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)器綠色(se)二極(ji)管(guan)(guan)則(ze)發(fa)光），此時(shi)VT3也因基極(ji)零(ling)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)而截(jie)止(zhi)，電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)調(diao)整管(guan)(guan)VT4正常導(dao)通，輸(shu)出2.1V直(zhi)流電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)，石英小(xiao)鬧鐘(zhong)(zhong)得電(dian)(dian)(dian)(dian)(dian)(dian)開(kai)始計時(shi)，當(dang)計時(shi)到(dao)預先設定值時(shi)，石英小(xiao)鬧鐘(zhong)(zhong)輸(shu)出低(di)電(dian)(dian)(dian)(dian)(dian)(dian)平音頻脈(mo)沖(chong)訊響信號(hao)，該低(di)電(dian)(dian)(dian)(dian)(dian)(dian)平音頻脈(mo)沖(chong)信號(hao)通過(guo)VT2放大整流經(jing)電(dian)(dian)(dian)(dian)(dian)(dian)容C5濾波輸(shu)出一直(zhi)流電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)，使VT1飽和導(dao)通，開(kai)關(guan)S1電(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)脫(tuo)鉤線圈得電(dian)(dian)(dian)(dian)(dian)(dian)產生磁(ci)力，使開(kai)關(guan)按鈕脫(tuo)鉤跳開(kai)，斷開(kai)交流電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)，從而實現自動(dong)結束(shu)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)。

　　二、元件選擇

　　元(yuan)件選(xuan)(xuan)(xuan)(xuan)(xuan)擇如(ru)電(dian)路(lu)原(yuan)理圖上(shang)的(de)(de)標注：VT1、VT3、VT4 選(xuan)(xuan)(xuan)(xuan)(xuan)用(yong)(yong)S8050 型三(san)極(ji)管，VT2 選(xuan)(xuan)(xuan)(xuan)(xuan)用(yong)(yong)S8550 型三(san)極(ji)管，IC1選(xuan)(xuan)(xuan)(xuan)(xuan)用(yong)(yong)LM7812，VD1 選(xuan)(xuan)(xuan)(xuan)(xuan)用(yong)(yong)IN4148 型二(er)(er)極(ji)管，VD2～D6選(xuan)(xuan)(xuan)(xuan)(xuan)用(yong)(yong)IN4007型二(er)(er)極(ji)管，LED1、 LED2選(xuan)(xuan)(xuan)(xuan)(xuan)用(yong)(yong)普(pu)(pu)(pu)通(tong)(tong)紅色發光(guang)二(er)(er)極(ji)管，LED3 選(xuan)(xuan)(xuan)(xuan)(xuan)用(yong)(yong)普(pu)(pu)(pu)通(tong)(tong)綠色發光(guang)二(er)(er)極(ji)管，R1選(xuan)(xuan)(xuan)(xuan)(xuan)用(yong)(yong)2kΩ 普(pu)(pu)(pu)通(tong)(tong)電(dian)阻，R2 選(xuan)(xuan)(xuan)(xuan)(xuan)用(yong)(yong)10kΩ普(pu)(pu)(pu)通(tong)(tong)電(dian)阻，R3、R4 選(xuan)(xuan)(xuan)(xuan)(xuan)用(yong)(yong)1kΩ 普(pu)(pu)(pu)通(tong)(tong)電(dian)阻，開關S1 選(xuan)(xuan)(xuan)(xuan)(xuan)用(yong)(yong)KDC-A01-06Y 型的(de)(de)，P1和J1 分別(bie)選(xuan)(xuan)(xuan)(xuan)(xuan)用(yong)(yong)普(pu)(pu)(pu)通(tong)(tong)單聲道耳機插頭、插孔。變壓(ya)器(qi)T 選(xuan)(xuan)(xuan)(xuan)(xuan)用(yong)(yong)3W/14V 電(dian)源變壓(ya)器(qi)， C1 選(xuan)(xuan)(xuan)(xuan)(xuan)用(yong)(yong)1000μF/25V 電(dian)解(jie)電(dian)容(rong)(rong)，C2、C3、C4 選(xuan)(xuan)(xuan)(xuan)(xuan)470μF/25V電(dian)解(jie)電(dian)容(rong)(rong)， C5 選(xuan)(xuan)(xuan)(xuan)(xuan)用(yong)(yong)47μF/25V 電(dian)解(jie)電(dian)容(rong)(rong)。實物如(ru)圖2所示。焊好(hao)的(de)(de)電(dian)路(lu)見圖3。

　　三、智能定時插座(zuo)的(de)安裝與使(shi)用說明

　　筆者利用萬(wan)能印(yin)制板(ban)來(lai)焊接(jie)本(ben)定(ding)時(shi)(shi)(shi)插座電(dian)路，安裝時(shi)(shi)(shi)注意(yi)，一定(ding)要(yao)將石英小(xiao)鬧鐘內的小(xiao)揚聲器拆除，小(xiao)揚聲器正極(ji)所(suo)(suo)接(jie)位(wei)置接(jie)三(san)極(ji)管(guan)VT2發射極(ji)，小(xiao)揚聲器負極(ji)所(suo)(suo)接(jie)位(wei)置接(jie)三(san)極(ji)管(guan)VT2基極(ji)，引線(xian)見圖4。本(ben)人焊接(jie)成(cheng)的定(ding)時(shi)(shi)(shi)插座電(dian)路與充電(dian)器連接(jie)如圖5所(suo)(suo)示。

　　在(zai)充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)前(qian)，先將定(ding)時(shi)(shi)值設(she)好，將充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)控制信號(hao)輸(shu)出(chu)插(cha)頭(tou)(tou)P1和(he)定(ding)時(shi)(shi)控制信號(hao)引入(ru)插(cha)孔(kong)J1連接好，充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)與蓄電(dian)(dian)(dian)(dian)(dian)(dian)瓶連好，插(cha)好交流電(dian)(dian)(dian)(dian)(dian)(dian)源插(cha)頭(tou)(tou)，最后按下開關S1按鈕，智能定(ding)時(shi)(shi)插(cha)座(zuo)會自(zi)動(dong)在(zai)充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)轉(zhuan)入(ru)浮(fu)充(chong)充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)狀態時(shi)(shi)開始(shi)計(ji)時(shi)(shi)，并在(zai)定(ding)時(shi)(shi)值達到時(shi)(shi)結(jie)束充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)。當充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)因蓄電(dian)(dian)(dian)(dian)(dian)(dian)瓶出(chu)問題(ti)（比如過度失水）而無法轉(zhuan)入(ru)浮(fu)充(chong)充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)狀態時(shi)(shi)，將充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)插(cha)頭(tou)(tou)P1和(he)定(ding)時(shi)(shi)插(cha)座(zuo)間的插(cha)孔(kong)J1斷開，定(ding)時(shi)(shi)插(cha)座(zuo)則通(tong)電(dian)(dian)(dian)(dian)(dian)(dian)開始(shi)計(ji)時(shi)(shi)， 當定(ding)時(shi)(shi)值達到時(shi)(shi)自(zi)動(dong)結(jie)束充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)。