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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)池充放電(dian)過(guo)程中會(hui)產生大量熱(re)量,使其內部溫(wen)度上升直(zhi)接影響鋰電(dian)池的性能與壽命,溫(wen)度過(guo)高甚至會(hui)導(dao)致電(dian)池熱(re)失控,引發安全事故。因此(ci),對充放電(dian)產熱(re)進行(xing)研究,并以此(ci)為基礎開展鋰電(dian)池熱(re)仿真模擬(ni),對于提高鋰電(dian)池安全性十分重要(yao)。電(dian)池等溫(wen)量熱(re)儀與電(dian)池絕...

  • 2019-06-05

    室(shi)溫離(li)子(zi)液體(ti)(ti)是指由(you)尺寸(cun)較大(da)(da)的(de)有機陽離(li)子(zi)(如咪唑、吡啶、季(ji)銨和季(ji)鏻(lin))和尺寸(cun)較小的(de)無機陰離(li)子(zi)如PF6-,BF4-,N(CN)2-,Cl-,Br-,NO3-組成(cheng),在室(shi)溫下呈(cheng)液態(tai)的(de)離(li)子(zi)化(hua)合(he)物。離(li)子(zi)液體(ti)(ti)因蒸氣(qi)壓低、對水和空氣(qi)穩(wen)定、易于(yu)回收利用(yong)而被(bei)稱為“綠色溶劑”。近(jin)年來,在實驗(yan)室(shi)合(he)成(cheng)的(de)離(li)子(zi)液體(ti)(ti)種(zhong)類繁多(duo),并被(bei)廣(guang)泛應用(yong)于(yu)化(hua)工分離(li)、有機合(he)成(cheng)、電化(hua)學、材料加工等領域。由(you)于(yu)離(li)子(zi)液體(ti)(ti)是一種(zhong)新型離(li)子(zi)化(hua)合(he)物且不同種(zhong)類之間(jian)的(de)性質差(cha)異較大(da)(da),其理化(hua)參數(shu)缺乏(fa)統一的(de)標準。其中(zhong)閃點值關系到離(li)子(zi)液體(ti)(ti)在使用(yong)中(zhong)的(de)安(an)全性...

  • 2019-04-25

    鋰(li)(li)(li)(li)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)熱(re)安全評估實驗室儀器解決(jue)方(fang)案(an)1.鋰(li)(li)(li)(li)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)熱(re)失(shi)控(kong)(kong)研(yan)(yan)究(jiu)(jiu)(jiu)隨著(zhu)鋰(li)(li)(li)(li)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)的(de)大規模應(ying)(ying)用(yong),其安全性(xing)(xing)能(neng)成(cheng)為社會關注(zhu)的(de)重點(dian)。明(ming)確(que)鋰(li)(li)(li)(li)離子(zi)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)發生熱(re)失(shi)控(kong)(kong)及(ji)熱(re)擴散(san)等行(xing)為的(de)表征方(fang)法,系統(tong)地研(yan)(yan)究(jiu)(jiu)(jiu)鋰(li)(li)(li)(li)離子(zi)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)熱(re)失(shi)控(kong)(kong)及(ji)熱(re)擴散(san)機制(zhi),可實現對(dui)鋰(li)(li)(li)(li)離子(zi)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)安全性(xing)(xing)的(de)全面(mian)認(ren)識和電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)安全性(xing)(xing)能(neng)可靠監管。現有的(de)鋰(li)(li)(li)(li)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)熱(re)失(shi)控(kong)(kong)研(yan)(yan)究(jiu)(jiu)(jiu)主要分為兩個(ge)方(fang)面(mian):一方(fang)面(mian)為鋰(li)(li)(li)(li)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)熱(re)失(shi)控(kong)(kong)機制(zhi)的(de)研(yan)(yan)究(jiu)(jiu)(jiu),包(bao)括鋰(li)(li)(li)(li)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)熱(re)失(shi)控(kong)(kong)誘(you)因(yin)、材料熱(re)穩定性(xing)(xing)及(ji)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)系統(tong)反(fan)應(ying)(ying)熱(re)動力學等;另一方(fang)面(mian)為鋰(li)(li)(li)(li)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)熱(re)擴散(san)和熱(re)蔓(man)延(yan)性(xing)(xing)能(neng)研(yan)(yan)究(jiu)(jiu)(jiu),包(bao)括鋰(li)(li)(li)(li)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)自身熱(re)擴散(san)能(neng)力、鋰(li)(li)(li)(li)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)組熱(re)蔓(man)延(yan)的(de)機制(zhi)和防(fang)治...

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