蓄(xu)電(dian)池(chi)不(bu)能(neng)直(zhi)接(jie)貯(zhu)存(cun)電(dian)能(neng),而(er)是(shi)將(qiang)電(dian)能(neng)轉(zhuan)變(bian)為(wei)化(hua)學(xue)能(neng)貯(zhu)存(cun)起(qi)來(lai),使(shi)用(yong)時(shi)將(qiang)化(hua)學(xue)能(neng)轉(zhuan)變(bian)為(wei)電(dian)能(neng)輸(shu)送(song)出(chu)去(qu)。
1.放(fang)電(dian)過(guo)程(cheng)
一(yi)個(ge)完(wan)全(quan)充(chong)電(dian)的(di)蓄(xu)電(dian)池(chi),正(zheng)扭(niu)板(pan)上(shang)的(di)活(huo)性(xing)物(wu)質(zhi)是(shi)二(er)氧(yang)化(hua)鉛(qian),負(fu)極(ji)板(pan)上(shang)的(di)活(huo)性(xing)物(wu)質(zhi)是(shi)海(hai)綿(mian)狀(zhuang)純(chun)鉛(qian)。電(dian)解(xie)液(ye)由(you)硫(liu)酸(suan)和(hu)蒸(zheng)餾(liu)水(shui)配(pei)製(zhi)而(er)成(cheng),當(dang)硫(liu)酸(suan)溶(rong)於(yu)水(shui)中(zhong),則(ze)產(chan)生(sheng)帶(dai)電(dian)荷(he)酌(zhuo)正(zheng)、負(fu)離(li)子(zi),如(ru)用(yong)導(dao)線(xian)持(chi)正(zheng)、負(fu)極(ji)連(lian)按(an)起(qi)來(lai),帶(dai)負(fu)電(dian)的(di)離(li)子(zi)移(yi)向(xiang)負(fu)極(ji)扳(pan),把(ba)電(dian)子(zi)交(jiao)給(ji)鉛(qian)板(pan)並(bing)與(yu)鉛(qian)板(pan)上(shang)的(di)鑷(nie)起(qi)化(hua)學(xue)反(fan)應(ying)生(sheng)成(cheng)硫(liu)酸(suan)鉛(qian),附(fu)著(zhuo)在(zai)鉛(qian)板(pan)上(shang),而(er)鉛(qian)板(pan)上(shang)得(dei)到(dao)的(di)電(dian)子(zi),沿(yan)導(dao)線(xian)流(liu)向(xiang)正(zheng)報(bao),經(jing)過(guo)用(yong)電(dian)設(she)備(bei),燈(deng)發(fa)亮(liang)。與(yu)此(ci)同(tong)時(shi),電(dian)解(xie)液(ye)中(zhong)的(di)帶(dai)正(zheng)電(dian)的(di)離(li)子(zi)移(yi)向(xiang)正(zheng)極(ji),接(jie)受(shou)從(zong)負(fu)極(ji)傳(zhuan)來(lai)的(di)電(dian)子(zi)與(yu)正(zheng)極(ji)板(pan)上(shang)的(di)二(er)氧(yang)化(hua)鉛(qian)、電(dian)液(ye)中(zhong)的(di)硫(liu)酸(suan)共(gong)同(tong)作(zuo)用(yong)生(sheng)成(cheng)硫(liu)酸(suan)鉛(qian)。而(er)電(dian)路(lu)中(zhong)電(dian)子(zi)連(lian)續(xu)運(yun)動(dong)形(xing)成(cheng)電(dian)流(liu),直(zhi)到(dao)正(zheng)、負(fu)極(ji)板(pan)上(shang)的(di)活(huo)性(xing)物(wu)質(zhi)都(du)變(bian)成(cheng)硫(liu)酸(suan)鉛(qian)後(hou),化(hua)學(xue)反(fan)應(ying)停(ting)止(zhi),電(dian)流(liu)消(xiao)失(shi),電(dian)油(you)比(bi)重(chong)不(bu)再(zai)下(xia)降(xiang),放(fang)電(dian)結(jie)束(shu)。
2.充(chong)電(dian)過(guo)程(cheng)
將(qiang)已(yi)放(fang)電(dian)的(di)蓄(xu)電(dian)池(chi)的(di)正(zheng)、負(fu)極(ji)分(fen)別(bie)與(yu)直(zhi)流(liu)電(dian)源(yuan)的(di)正(zheng)、負(fu)極(ji)接(jie)通(tong),充(chong)電(dian)電(dian)流(liu)由(you)電(dian)源(yuan)正(zheng)極(ji)經(jing)導(dao)線(xian)進(jin)入(ru)蓄(xu)電(dian)池(chi)正(zheng)極(ji),這(zhe)時(shi)蓄(xu)電(dian)池(chi)內(nei)部(bu)兩(liang)極(ji)極(ji)和(hu)電(dian)解(xie)掖(ye)就(jiu)發(fa)生(sheng)與(yu)放(fang)電(dian)相(xiang)反(fan)的(di)化(hua)學(xue)反(fan)應(ying)。電(dian)解(xie)液(ye)中(zhong)的(di)負(fu)離(li)子(zi)移(yi)向(xiang)正(zheng)極(ji)板(pan),交(jiao)出(chu)電(dian)子(zi),並(bing)和(hu)正(zheng)極(ji)板(pan)上(shang)的(di)硫(liu)酸(suan)鉛(qian)越(yue)作(zuo)用(yong),轉(zhuan)變(bian)成(cheng)二(er)氧(yang)化(hua)鉛(qian)和(hu)硫(liu)酸(suan)。電(dian)子(zi)沿(yan)導(dao)線(xian)經(jing)電(dian)源(yuan)回(hui)蓄(xu)電(dian)他(ta)的(di)負(fu)極(ji),電(dian)解(xie)液(ye)中(zhong)的(di)正(zheng)離(li)子(zi)移(yi)向(xiang)負(fu)極(ji)板(pan),接(jie)受(shou)電(dian)於(yu),與(yu)負(fu)極(ji)板(pan)上(shang)艙(cang)硫(liu)酸(suan)鉛(qian)起(qi)作(zuo),轉(zhuan)變(bian)成(cheng)純(chun)鉛(qian)和(hu)硫(liu)酸(suan),正(zheng)、負(fu)極(ji)板(pan)轉(zhuan)變(bian)產(chan)生(sheng)的(di)硫(liu)酸(suan)全(quan)部(bu)溶(rong)解(xie)於(yu)電(dian)解(xie)液(ye)中(zhong)。所(suo)以(yi),在(zai)充(chong)電(dian)終(zhong)了(liao)時(shi),正(zheng)、負(fu)極(ji)板(pan)分(fen)別(bie)恢(hui)複(fu)成(cheng)二(er)氧(yang)化(hua)鉛(qian)和(hu)鉛(qian),電(dian)解(xie)液(ye)中(zhong)硫(liu)酸(suan)增(zeng)加(jia),比(bi)重(chong)上(shang)升(sheng)。
由(you)於(yu)充(chong)、放(fang)電(dian)過(guo)程(cheng)中(zhong),電(dian)解(xie)液(ye)比(bi)重(chong)隨(sui)之(zhi)變(bian)化(hua),因(yin)而(er)在(zai)使(shi)用(yong)過(guo)程(cheng)中(zhong)通(tong)過(guo)測(ce)定(ding)電(dian)解(xie)液(ye)比(bi)重(chong)的(di)變(bian)化(hua),就(jiu)可(ke)以(yi)判(pan)斷(duan)蓄(xu)電(dian)池(chi)充(chong)、放(fang)電(dian)的(di)程(cheng)度(duo)。蓄(xu)電(dian)池(chi)在(zai)靜(jing)止(zhi)狀(zhuang)態(tai)時(shi),電(dian)動(dong)勢(shi)與(yu)電(dian)解(xie)校(jiao)比(bi)重(chong)成(cheng)正(zheng)比(bi)。
電(dian)動(dong)勢(shi)=0.84+比(bi)重(chong)(15℃)
在(zai)充(chong)、放(fang)電(dian)過(guo)程(cheng)中(zhong),由(you)於(yu)電(dian)解(xie)液(ye)比(bi)重(chong)的(di)變(bian)化(hua),電(dian)動(dong)勢(shi)也(ye)就(jiu)發(fa)生(sheng)相(xiang)應(ying)的(di)變(bian)化(hua)。
蓄(xu)電(dian)池(chi)的(di)端(duan)電(dian)壓(ya)在(zai)放(fang)電(dian)時(shi)是(shi)不(bu)斷(duan)下(xia)降(xiang)的(di),且(qie)總(zong)是(shi)小(xiao)於(yu)電(dian)動(dong)勢(shi),因(yin)蓄(xu)電(dian)池(chi)有(you)內(nei)阻(zu)壓(ya)降(xiang)。蓄(xu)電(dian)池(chi)的(di)內(nei)阻(zu)包(bao)括(kuo)電(dian)解(xie)液(ye)的(di)電(dian)阻(zu)、極(ji)板(pan)電(dian)阻(zu)、陰(yin)極(ji)電(dian)阻(zu)和(hu)極(ji)校(jiao)接(jie)觸(chu)電(dian)阻(zu)等(deng)。其(qi)中(zhong),電(dian)解(xie)液(ye)的(di)電(dian)阻(zu)與(yu)電(dian)解(xie)波(bo)的(di)比(bi)重(chong)和(hu)溫(wen)度(duo)有(you)關(guan)。比(bi)重(chong)或(huo)溫(wen)度(duo)下(xia)降(xiang),內(nei)阻(zu)增(zeng)加(jia);比(bi)重(chong)或(huo)溫(wen)度(duo)升(sheng)高(gao),內(nei)阻(zu)減(jian)小(xiao)。因(yin)此(ci),隨(sui)著(zhuo)溫(wen)度(duo)降(xiang)低(di),蓄(xu)電(dian)池(chi)的(di)放(fang)電(dian)性(xing)能(neng)也(ye)將(qiang)降(xiang)低(di)。此(ci)外(wai),大(dai)電(dian)流(liu)放(fang)電(dian)也(ye)能(neng)使(shi)蓄(xu)電(dian)池(chi)的(di)放(fang)電(dian)能(neng)力(li)顯(xian)著(zhuo)降(xiang)低(di),這(zhe)是(shi)因(yin)為(wei)極(ji)校(jiao)孔(kong)隙(xi)小(xiao)電(dian)解(xie)液(ye)變(bian)稀(xi),濃(nong)度(duo)大(dai)的(di)電(dian)解(xie)液(ye)來(lai)不(bu)及(ji)滲(shen)入(ru)內(nei)部(bu),從(zong)而(er)影(ying)響(xiang)了(liao)蓄(xu)電(dian)池(chi)的(di)電(dian)動(dong)勢(shi)。在(zai)蓄(xu)電(dian)池(chi)不(bu)工(gong)作(zuo)一(yi)些(xie)時(shi)間(jian)後(hou),電(dian)動(dong)勢(shi)有(you)所(suo)恢(hui)複(fu)。
在(zai)放(fang)電(dian)允(yun)許(xu)範(fan)圍(wei)內(nei),蓄(xu)電(dian)池(chi)輸(shu)出(chu)的(di)電(dian)量(liang)叫(jiao)做(zuo)蓄(xu)電(dian)池(chi)的(di)容(rong)量(liang),它(ta)是(shi)放(fang)電(dian)電(dian)流(liu)和(hu)時(shi)間(jian)的(di)乘(sheng)積(ji),單(shan)位(wei)為(wei)“安(an)時(shi)”。通(tong)常(chang)所(suo)說(shui)蓄(xu)電(dian)池(chi)的(di)額(e)定(ding)容(rong)量(liang)是(shi)在(zai)電(dian)解(xie)液(ye)平(ping)均(jun)溫(wen)度(duo)為(wei)30℃時(shi),以(yi)10小(xiao)時(shi)放(fang)電(dian)率(shuai)的(di)放(fang)電(dian)電(dian)流(liu),連(lian)續(xu)放(fang)電(dian)10小(xiao)時(shi),單(shan)格(ge)電(dian)壓(ya)降(xiang)到(dao)1.7伏(fu)(終(zhong)止(zhi)電(dian)壓(ya))所(suo)輸(shu)出(chu)的(di)電(dian)量(liang)。蓄(xu)電(dian)池(chi)的(di)起(qi)動(dong)容(rong)量(liang)用(yong)來(lai)表(biao)示(shi)蓄(xu)電(dian)池(chi)向(xiang)起(qi)動(dong)電(dian)動(dong)機(ji)的(di)供(gong)電(dian)能(neng)力(li)。就(jiu)是(shi)在(zai)30℃的(di)條(tiao)件(jian)下(xia),以(yi)3倍(bei)於(yu)額(e)定(ding)容(rong)量(liang)的(di)電(dian)流(liu)放(fang)電(dian),連(lian)續(xu)放(fang)電(dian)至(zhi)單(shan)掐(qia)電(dian)壓(ya)降(xiang)到(dao)1.5伏(fu)時(shi)所(suo)輸(shu)出(chu)的(di)電(dian)量(liang)。
蓄(xu)電(dian)池(chi)的(di)容(rong)量(liang)和(hu)放(fang)電(dian)電(dian)流(liu)、溫(wen)度(duo)、電(dian)解(xie)液(ye)的(di)比(bi)重(chong)有(you)關(guan)。放(fang)電(dian)電(dian)流(liu)加(jia)大(dai),蓄(xu)電(dian)池(chi)的(di)容(rong)且(qie)減(jian)小(xiao)。所(suo)以(yi),連(lian)續(xu)長(zhang)時(shi)間(jian)使(shi)用(yong)起(qi)動(dong)電(dian)動(dong)機(ji),特(te)使(shi)蓄(xu)電(dian)池(chi)的(di)電(dian)壓(ya)迅(xun)速(su)降(xiang)至(zhi)終(zhong)止(zhi)電(dian)壓(ya),輸(shu)出(chu)容(rong)量(liang)迅(xun)速(su)減(jian)小(xiao),並(bing)使(shi)蓄(xu)電(dian)池(chi)早(zao)期(qi)損(sun)壞(huai)。
電(dian)解(xie)液(ye)溫(wen)度(duo)降(xiang)低(di),蓄(xu)電(dian)池(chi)容(rong)量(liang)減(jian)小(xiao)。每(mei)當(dang)溫(wen)度(duo)降(xiang)低(di)1℃時(shi),容(rong)量(liang)減(jian)小(xiao)約(yao)1—2%,但(dan)溫(wen)度(duo)不(bu)宜(yi)過(guo)高(gao)(大(dai)於(yu)45℃),否(pi)則(ze)會(kuai)使(shi)極(ji)板(pan)供(gong)曲(qu)。
電(dian)解(xie)液(ye)比(bi)重(chong)降(xiang)低(di),蓄(xu)電(dian)池(chi)容(rong)量(liang)減(jian)小(xiao)。所(suo)以(yi),增(zeng)大(dai)電(dian)解(xie)液(ye)比(bi)重(chong),可(ke)提(ti)高(gao)蓄(xu)電(dian)他(ta)的(di)容(rong)量(liang),但(dan)比(bi)重(chong)過(guo)大(dai),摻(can)透(tou)進(jin)度(duo)降(xiang)低(di),反(fan)而(er)使(shi)容(rong)量(liang)減(jian)小(xiao)和(hu)損(sun)壞(huai)隔(ge)板(pan)。