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本期預覽仰儀(yi)科技BAC系列(lie)全尺寸(cun)大型電(dian)(dian)池絕(jue)(jue)熱(re)(re)(re)(re)(re)量熱(re)(re)(re)(re)(re)儀(yi)可(ke)針對長(chang)邊≤1500mm范圍內的(de)電(dian)(dian)芯開展安全、精準(zhun)、可(ke)靠的(de)絕(jue)(jue)熱(re)(re)(re)(re)(re)熱(re)(re)(re)(re)(re)失控(kong)(kong)測試。與目前國內外廠(chang)家(jia)的(de)標準(zhun)產品(pin)相比(bi)，BAC系列(lie)具有(you)更大的(de)量熱(re)(re)(re)(re)(re)腔容量、更高的(de)安全防護和(he)更豐(feng)富的(de)測試功(gong)能。電(dian)(dian)池絕(jue)(jue)熱(re)(re)(re)(re)(re)量熱(re)(re)(re)(re)(re)儀(yi)應用電(dian)(dian)池絕(jue)(jue)熱(re)(re)(re)(re)(re)量熱(re)(re)(re)(re)(re)儀(yi)（BatteryAcceleratingCalorimeter）是(shi)用于評價鋰離子電(dian)(dian)池熱(re)(re)(re)(re)(re)穩定性和(he)熱(re)(re)(re)(re)(re)失控(kong)(kong)過(guo)程(cheng)熱(re)(re)(re)(re)(re)動力學參數(shu)的(de)重要(yao)儀(yi)器。通(tong)過(guo)電(dian)(dian)池絕(jue)(jue)熱(re)(re)(re)(re)(re)量熱(re)(re)(re)(re)(re)儀(yi)可(ke)以有(you)效獲取鋰電(dian)(dian)池的(de)自放(fang)熱(re)(re)(re)(re)(re)起始(shi)溫度(Tonset)、熱(re)(re)(re)(re)(re)失控(kong)(kong)起始(shi)溫度(TTR)、熱(re)(re)(re)(re)(re)...

前言(yan)自加速分解溫度(du)(SADT)是(shi)一(yi)定包裝(zhuang)材料(liao)和尺寸的(de)反應(ying)性化(hua)(hua)(hua)(hua)學物質(zhi)在實際應(ying)用(yong)過(guo)程中(zhong)的(de)最(zui)高(gao)允(yun)許環境(jing)(jing)溫度(du)，是(shi)實際包裝(zhuang)品中(zhong)的(de)反應(ying)性化(hua)(hua)(hua)(hua)學物質(zhi)在7日(ri)內發(fa)生(sheng)自加速分解的(de)ZUI低環境(jing)(jing)溫度(du)，一(yi)旦儲(chu)存環境(jing)(jing)溫度(du)高(gao)于SADT，該物質(zhi)就有發(fa)生(sheng)火(huo)災、爆炸(zha)事故(gu)的(de)風險。SADT反映(ying)化(hua)(hua)(hua)(hua)學品的(de)熱危(wei)險性，也是(shi)衡量和規范化(hua)(hua)(hua)(hua)學品儲(chu)運(yun)安全(quan)的(de)重要參數。江蘇響水3.21硝化(hua)(hua)(hua)(hua)廢料(liao)爆炸(zha)等重特(te)大事故(gu)促使(shi)國家和社會愈發(fa)關(guan)注(zhu)化(hua)(hua)(hua)(hua)學品儲(chu)運(yun)安全(quan)。2022年8月16日(ri)，應(ying)急管(guan)理部(bu)危(wei)化(hua)(hua)(hua)(hua)監管(guan)一(yi)司(si)發(fa)布了《關(guan)于征(zheng)求精細化(hua)(hua)(hua)(hua)工“四個(ge)清零”問題釋義(yi)（征(zheng)...

前言鋰離子電(dian)(dian)(dian)(dian)池(chi)(chi)在充放(fang)電(dian)(dian)(dian)(dian)過(guo)程中存(cun)在明顯的(de)(de)(de)熱效應，包括(kuo)電(dian)(dian)(dian)(dian)極(ji)反應熱、極(ji)化熱、焦耳(er)熱和副反應熱等(deng)[1]。這些熱量(liang)使電(dian)(dian)(dian)(dian)池(chi)(chi)內部溫(wen)度上升，一旦溫(wen)度過(guo)高將影(ying)響(xiang)電(dian)(dian)(dian)(dian)池(chi)(chi)性(xing)能(neng)(neng)和壽命，甚至會導致電(dian)(dian)(dian)(dian)池(chi)(chi)發生熱失控。因此，電(dian)(dian)(dian)(dian)池(chi)(chi)充放(fang)電(dian)(dian)(dian)(dian)產(chan)熱數據是進行電(dian)(dian)(dian)(dian)池(chi)(chi)熱管理設計的(de)(de)(de)必要(yao)參數。目前，基于功(gong)(gong)率補償等(deng)溫(wen)量(liang)熱原理的(de)(de)(de)等(deng)溫(wen)量(liang)熱儀和基于絕(jue)熱追蹤(zong)原理的(de)(de)(de)絕(jue)熱加速量(liang)熱儀是測量(liang)電(dian)(dian)(dian)(dian)池(chi)(chi)充放(fang)電(dian)(dian)(dian)(dian)產(chan)熱的(de)(de)(de)主要(yao)儀器(qi)。如(ru)圖1所示(shi)，等(deng)溫(wen)量(liang)熱儀能(neng)(neng)夠(gou)控制電(dian)(dian)(dian)(dian)池(chi)(chi)溫(wen)度保(bao)持恒定，并利用電(dian)(dian)(dian)(dian)功(gong)(gong)率對電(dian)(dian)(dian)(dian)池(chi)(chi)產(chan)熱功(gong)(gong)率進行等(deng)效補償；絕(jue)熱量(liang)熱儀能(neng)(neng)夠(gou)進行電(dian)(dian)(dian)(dian)池(chi)(chi)溫(wen)度追蹤(zong)，獲得電(dian)(dian)(dian)(dian)池(chi)(chi)在充...

前言鎳(nie)(nie)鈷(gu)錳或鎳(nie)(nie)鈷(gu)鋁三元(yuan)(yuan)鋰(li)離子電(dian)(dian)池(chi)具有能量密(mi)度(du)高(gao)(gao)、低溫及循環性(xing)能好(hao)等優勢(shi)[1]，被廣泛應(ying)用于新(xin)能源(yuan)汽(qi)車(che)等領域。與此(ci)同時，三元(yuan)(yuan)鋰(li)電(dian)(dian)池(chi)也存(cun)在著熱(re)穩定(ding)性(xing)較差的(de)(de)缺點，三元(yuan)(yuan)正極(ji)(ji)材料(liao)在250-300℃的(de)(de)高(gao)(gao)溫下會發生劇烈的(de)(de)分解反應(ying)，同時釋(shi)放氧分子，誘發電(dian)(dian)解液燃燒和電(dian)(dian)池(chi)爆(bao)燃。為(wei)滿足(zu)新(xin)能源(yuan)汽(qi)車(che)日益增長的(de)(de)續航里程需求，部(bu)分電(dian)(dian)池(chi)廠商致力于不斷提高(gao)(gao)電(dian)(dian)池(chi)的(de)(de)能量密(mi)度(du)，因此(ci)三元(yuan)(yuan)鋰(li)電(dian)(dian)池(chi)從低鎳(nie)(nie)3系(xi)電(dian)(dian)池(chi)不斷發展到(dao)高(gao)(gao)鎳(nie)(nie)8系(xi)以及超(chao)高(gao)(gao)鎳(nie)(nie)9系(xi)電(dian)(dian)池(chi)。理論(lun)上伴隨(sui)著活性(xing)金屬(shu)成分的(de)(de)不斷提升，正極(ji)(ji)材料(liao)和電(dian)(dian)池(chi)的(de)(de)熱(re)穩定(ding)性(xing)下降，熱(re)失控風(feng)...

前(qian)言為了確保(bao)鋰離子電(dian)池(chi)(chi)的(de)安全(quan)使用，需要(yao)獲取電(dian)池(chi)(chi)熱(re)(re)(re)(re)失(shi)控特(te)征參(can)數作為電(dian)池(chi)(chi)熱(re)(re)(re)(re)管理系統的(de)設計輸入，實現對電(dian)池(chi)(chi)熱(re)(re)(re)(re)失(shi)控的(de)預防(fang)與早期預警。目前(qian)，行業(ye)內對鋰電(dian)池(chi)(chi)熱(re)(re)(re)(re)失(shi)控的(de)測試(shi)主要(yao)依托于電(dian)池(chi)(chi)絕熱(re)(re)(re)(re)量(liang)熱(re)(re)(re)(re)儀（ARC）。該儀器能(neng)夠測定電(dian)池(chi)(chi)自(zi)放(fang)熱(re)(re)(re)(re)絕熱(re)(re)(re)(re)溫(wen)升(sheng)(sheng)曲(qu)線(xian)，并得到電(dian)池(chi)(chi)自(zi)放(fang)熱(re)(re)(re)(re)起始溫(wen)度(du)(du)（Tonset）、熱(re)(re)(re)(re)失(shi)控起始溫(wen)度(du)(du)（TTR）、最高溫(wen)度(du)(du)（Tmax）、泄壓溫(wen)度(du)(du)（TV）、最大溫(wen)升(sheng)(sheng)速率(lv)（(dT/dt)max）和最大壓升(sheng)(sheng)速率(lv)(（dP/dt)max)等(deng)特(te)征參(can)數。鋰電(dian)池(chi)(chi)熱(re)(re)(re)(re)失(shi)控絕熱(re)(re)(re)(re)量(liang)熱(re)(re)(re)(re)測試(shi)方法目前(qian)尚未形成統一(yi)的(de)技術標準或(huo)...