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計量規范 | 可溯源的電池等溫量熱儀校準方案
2024-07-19

前沿鋰電(dian)(dian)池(chi)充放(fang)(fang)電(dian)(dian)過(guo)程中(zhong)會產生(sheng)大量熱(re)量,使其內部(bu)溫度(du)上升直接影響鋰電(dian)(dian)池(chi)的性(xing)能與壽命,溫度(du)過(guo)高(gao)甚至會導致電(dian)(dian)池(chi)熱(re)失控,引發安全事故(gu)。因此,對充放(fang)(fang)電(dian)(dian)產熱(re)進行研(yan)究,并(bing)以(yi)此為基礎開展鋰電(dian)(dian)池(chi)熱(re)仿(fang)真模(mo)擬,對于(yu)提(ti)高(gao)鋰電(dian)(dian)池(chi)安全性(xing)十分重要。電(dian)(dian)池(chi)等溫量熱(re)儀與電(dian)(dian)池(chi)絕...

  • 2022-01-27

    TAC-500A絕熱(re)(re)加速(su)(su)量熱(re)(re)儀快速(su)(su)、靈敏、精(jing)確的(de)絕熱(re)(re)跟蹤性能確保獲得絕熱(re)(re)熱(re)(re)失控過程真實(shi)完整(zheng)的(de)熱(re)(re)和壓(ya)力變化數(shu)據,推算(suan)(suan)準確的(de)TD24、TMRad、SADT等(deng)熱(re)(re)安全(quan)關(guan)鍵指標。1.保持環境(jing)與(yu)反應(ying)體(ti)系溫(wen)度相等(deng)2.獲取絕熱(re)(re)狀態下樣品反應(ying)過程的(de)熱(re)(re)力學(xue)和動(dong)力學(xue)數(shu)據3.推算(suan)(suan)TD24、TMRad、SADT等(deng)熱(re)(re)安全(quan)關(guan)鍵指標4.幫(bang)助確定(ding)化學(xue)品加工、貯存和運(yun)輸的(de)安全(quan)條件助您評估風險(xian)、優化工藝(yi)便捷:配備專業(ye)的(de)數(shu)據分析軟件,可實(shi)現參(can)數(shu)實(shi)時跟蹤計算(suan)(suan)精(jing)確:溫(wen)度分辨率0.001℃,檢測閾(yu)值<0.01℃/min一...

  • 2022-01-26

    【預覽(lan)】本文利(li)用爆(bao)(bao)炸(zha)(zha)(zha)極限(xian)試驗儀對(dui)磷酸鐵鋰電(dian)池單體(3.2V/265Ah)熱(re)(re)失控(kong)產(chan)氣(qi)的爆(bao)(bao)炸(zha)(zha)(zha)極限(xian)與極限(xian)氧(yang)濃(nong)(nong)度進行了研究,相關爆(bao)(bao)炸(zha)(zha)(zha)特性參數(shu)可為(wei)(wei)儲(chu)能(neng)電(dian)站等(deng)應用場景的防爆(bao)(bao)抑爆(bao)(bao)設(she)計(ji)提供(gong)理論依據(ju)(ju)。一、前言鋰離(li)子電(dian)池熱(re)(re)失控(kong)過程會產(chan)生由多種可燃組分構成(cheng)的混合氣(qi)體,這種熱(re)(re)解(jie)氣(qi)一旦(dan)被(bei)點燃會出現不可控(kong)的嚴重后果。測定鋰電(dian)池熱(re)(re)失控(kong)產(chan)氣(qi)的爆(bao)(bao)炸(zha)(zha)(zha)極限(xian)與極限(xian)氧(yang)濃(nong)(nong)度,可為(wei)(wei)儲(chu)能(neng)電(dian)站等(deng)爆(bao)(bao)炸(zha)(zha)(zha)性環境的氧(yang)濃(nong)(nong)度控(kong)制提供(gong)理論依據(ju)(ju),有效預防爆(bao)(bao)炸(zha)(zha)(zha)和(he)火災事故;也可為(wei)(wei)地下車庫等(deng)應用場景的通(tong)風設(she)計(ji)提供(gong)數(shu)據(ju)(ju)支持,提高(gao)公(gong)共安全性。2021...

  • 2022-01-07

    按照封裝方式的(de)(de)(de)不(bu)同,鋰離子(zi)電(dian)(dian)(dian)池(chi)可以(yi)分為軟(ruan)包、方形(xing)(xing)、圓柱形(xing)(xing)。其(qi)中(zhong)軟(ruan)包鋰電(dian)(dian)(dian)池(chi)與(yu)(yu)我(wo)們的(de)(de)(de)日常生活密切相關,被廣泛(fan)應用于3C電(dian)(dian)(dian)子(zi)產品以(yi)及新能源汽車領(ling)域。利(li)用3D熱(re)(re)物(wu)性分析儀(yi)測(ce)量軟(ruan)包鋰電(dian)(dian)(dian)池(chi)導(dao)熱(re)(re)系(xi)(xi)數,并研究(jiu)了導(dao)熱(re)(re)系(xi)(xi)數隨(sui)電(dian)(dian)(dian)池(chi)溫度的(de)(de)(de)變化(hua)。結果表(biao)明,電(dian)(dian)(dian)池(chi)面(mian)向與(yu)(yu)縱向導(dao)熱(re)(re)系(xi)(xi)數均隨(sui)溫度窄(zhai)幅上升(sheng)。在鋰電(dian)(dian)(dian)池(chi)熱(re)(re)管(guan)理設計與(yu)(yu)開發(fa)過程(cheng)中(zhong),熱(re)(re)仿真是主要(yao)(yao)的(de)(de)(de)輔助開發(fa)手(shou)段及驗證工(gong)具。導(dao)熱(re)(re)系(xi)(xi)數是熱(re)(re)仿真所(suo)需的(de)(de)(de)最重要(yao)(yao)熱(re)(re)物(wu)性參(can)數之一(yi),直接影響電(dian)(dian)(dian)池(chi)的(de)(de)(de)散(san)熱(re)(re)特性。軟(ruan)包電(dian)(dian)(dian)池(chi)是由鋁塑(su)膜(mo)(mo)、正負(fu)極材料、隔膜(mo)(mo)、集流體和電(dian)(dian)(dian)解質(zhi)組成的(de)(de)(de)多層復合結構,...

  • 2021-12-10

    背景介(jie)紹(shao)作為驅(qu)動(dong)能(neng)源革命的(de)(de)重(zhong)要力量,鋰離(li)子電(dian)池(chi)(chi)迅速成為了電(dian)動(dong)汽車、便攜式(shi)電(dian)子設備等的(de)(de)主要儲能(neng)介(jie)質。然而鋰電(dian)池(chi)(chi)的(de)(de)進一步(bu)發(fa)展仍面臨(lin)多重(zhong)挑戰,除去基本的(de)(de)成本等經濟因素外,熱(re)(re)(re)安(an)全性是鋰電(dian)池(chi)(chi)飽受詰難(nan)的(de)(de)問題之一。在動(dong)力電(dian)池(chi)(chi)的(de)(de)系(xi)統(tong)集(ji)成開(kai)發(fa)過程中,電(dian)池(chi)(chi)的(de)(de)熱(re)(re)(re)管(guan)理與(yu)安(an)全防護是其設計(ji)核心。優秀的(de)(de)熱(re)(re)(re)管(guan)理系(xi)統(tong)在設計(ji)時,離(li)不開(kai)仿真(zhen)軟(ruan)件的(de)(de)模擬和分析,而進行精確(que)仿真(zhen)的(de)(de)前提(ti)條件則是能(neng)夠輸(shu)入準確(que)的(de)(de)電(dian)池(chi)(chi)熱(re)(re)(re)物性參數(shu),這其中包括(kuo)電(dian)池(chi)(chi)的(de)(de)密(mi)度、比熱(re)(re)(re)容、接(jie)觸熱(re)(re)(re)阻和導熱(re)(re)(re)系(xi)數(shu)(或熱(re)(re)(re)擴(kuo)散系(xi)數(shu))等。其中導熱(re)(re)(re)系(xi)數(shu)是最重(zhong)要的(de)(de)熱(re)(re)(re)物性參數(shu)...

  • 2021-12-10

    閃(shan)(shan)點(dian)(dian)(dian)(dian)是(shi)在規定的(de)(de)試驗(yan)條(tiao)件(jian)下,點(dian)(dian)(dian)(dian)火源能夠引發(fa)可(ke)(ke)(ke)燃(ran)液(ye)體(ti)表(biao)面蒸氣發(fa)生閃(shan)(shan)火時的(de)(de)最小(xiao)溫(wen)度。閃(shan)(shan)點(dian)(dian)(dian)(dian)是(shi)化(hua)學品行業,特別是(shi)油品行業的(de)(de)一項(xiang)重要安全標(biao)準與(yu)質量(liang)指(zhi)標(biao),關系到(dao)可(ke)(ke)(ke)燃(ran)液(ye)體(ti)的(de)(de)使用(yong)、存儲和運(yun)輸安全。閃(shan)(shan)點(dian)(dian)(dian)(dian)測(ce)(ce)試方法可(ke)(ke)(ke)以(yi)(yi)分(fen)(fen)為閉(bi)口(kou)(kou)(kou)(kou)(kou)(kou)閃(shan)(shan)點(dian)(dian)(dian)(dian)和開口(kou)(kou)(kou)(kou)(kou)(kou)閃(shan)(shan)點(dian)(dian)(dian)(dian)兩種。開口(kou)(kou)(kou)(kou)(kou)(kou)閃(shan)(shan)點(dian)(dian)(dian)(dian)實驗(yan)由于可(ke)(ke)(ke)燃(ran)液(ye)體(ti)蒸氣不(bu)易積(ji)累,所(suo)以(yi)(yi)其閃(shan)(shan)點(dian)(dian)(dian)(dian)測(ce)(ce)試結果會高于閉(bi)口(kou)(kou)(kou)(kou)(kou)(kou)閃(shan)(shan)點(dian)(dian)(dian)(dian)。為了(le)在評(ping)估過程中獲得更大(da)的(de)(de)安全裕(yu)量(liang),通常采用(yong)閉(bi)口(kou)(kou)(kou)(kou)(kou)(kou)閃(shan)(shan)點(dian)(dian)(dian)(dian)測(ce)(ce)試的(de)(de)數據。閉(bi)口(kou)(kou)(kou)(kou)(kou)(kou)閃(shan)(shan)點(dian)(dian)(dian)(dian)測(ce)(ce)試方法主要分(fen)(fen)為賓(bin)斯基-馬(ma)丁閉(bi)口(kou)(kou)(kou)(kou)(kou)(kou)杯法(GB/T261、ASTMD93)、常閉(bi)式閉(bi)口(kou)(kou)(kou)(kou)(kou)(kou)杯法(ASTMD6450、SH/...

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