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車用動力電池熱安全研究取得階段性進展

2019/3/4 10:12:58??????點擊:
  動力(li)電(dian)池熱安全(quan)問(wen)題(ti)是影響電(dian)動汽(qi)車(che)(che)行駛安全(quan)的關鍵(jian)。在國家重點研(yan)(yan)發計(ji)劃“新能(neng)源汽(qi)車(che)(che)”專(zhuan)項2016年(nian)度立(li)項項目“高比能(neng)量動力(li)鋰(li)離(li)子(zi)電(dian)池開(kai)發與產業化技(ji)術(shu)攻關”的實施中,研(yan)(yan)發團(tuan)隊針對高比能(neng)量鋰(li)離(li)子(zi)動力(li)電(dian)池熱安全(quan)機理和安全(quan)設計(ji)開(kai)展了(le)深入研(yan)(yan)究,目前(qian)取得了(le)階段(duan)性進(jin)展。
  項目(mu)團(tuan)隊圍繞鋰離(li)子(zi)(zi)電(dian)池(chi)在充放電(dian)過程中的產熱過程、各成(cheng)分(fen)的熱穩定(ding)(ding)性(xing)(xing),以(yi)(yi)1Ah鋰離(li)子(zi)(zi)電(dian)池(chi)單體為研(yan)究對象,通過實驗(yan)獲得表(biao)觀(guan)導(dao)熱系數、各向(xiang)異性(xing)(xing)導(dao)熱系數、恒壓比熱容、溫(wen)度系數及(ji)室溫(wen)內阻,從而(er)計(ji)算出生熱速(su)率。定(ding)(ding)性(xing)(xing)分(fen)析(xi)了(le)電(dian)池(chi)在100%電(dian)量(liang)和(he)0%電(dian)量(liang)兩(liang)個狀態下正負極材料(liao)的熱穩定(ding)(ding)性(xing)(xing)以(yi)(yi)及(ji)電(dian)解液對其熱穩定(ding)(ding)性(xing)(xing)的影(ying)響(xiang)。在電(dian)池(chi)的熱失(shi)控部分(fen)采用(yong)加速(su)量(liang)熱方(fang)法對100%電(dian)量(liang)的軟(ruan)包鋰離(li)子(zi)(zi)電(dian)池(chi)進(jin)行熱失(shi)控實驗(yan),確定(ding)(ding)了(le)電(dian)池(chi)的熱失(shi)控起始溫(wen)度、最高溫(wen)度以(yi)(yi)及(ji)自升(sheng)溫(wen)速(su)率。相關研(yan)究成(cheng)果和(he)試驗(yan)結果為動力電(dian)池(chi)的熱安全結構(gou)設計(ji)提供(gong)了(le)理論(lun)和(he)數據基(ji)礎(chu)。
  該項目(mu)團(tuan)隊圍繞熱(re)(re)固性(xing)(xing)聚(ju)合(he)(he)物(wu)材(cai)(cai)(cai)(cai)料(liao)(liao)(liao)(liao)(liao)和(he)正溫度系數(shu)熱(re)(re)敏材(cai)(cai)(cai)(cai)料(liao)(liao)(liao)(liao)(liao)(PTC材(cai)(cai)(cai)(cai)料(liao)(liao)(liao)(liao)(liao))在(zai)電(dian)(dian)池(chi)(chi)(chi)單(dan)(dan)(dan)體中的(de)(de)應(ying)(ying)(ying)用(yong)工(gong)藝(yi)與技術(shu),結合(he)(he)理化分析測(ce)(ce)試(shi)(shi)(shi)、電(dian)(dian)化學(xue)測(ce)(ce)試(shi)(shi)(shi)、電(dian)(dian)性(xing)(xing)能測(ce)(ce)試(shi)(shi)(shi)和(he)電(dian)(dian)池(chi)(chi)(chi)安全性(xing)(xing)能測(ce)(ce)試(shi)(shi)(shi)等(deng)手段(duan),研究了(le)熱(re)(re)固性(xing)(xing)聚(ju)合(he)(he)物(wu)材(cai)(cai)(cai)(cai)料(liao)(liao)(liao)(liao)(liao)在(zai)電(dian)(dian)池(chi)(chi)(chi)中的(de)(de)應(ying)(ying)(ying)用(yong)工(gong)藝(yi),達到了(le)優化應(ying)(ying)(ying)用(yong)工(gong)藝(yi)流程的(de)(de)目(mu)的(de)(de);研究了(le)正溫度系數(shu)熱(re)(re)敏材(cai)(cai)(cai)(cai)料(liao)(liao)(liao)(liao)(liao)(PTC材(cai)(cai)(cai)(cai)料(liao)(liao)(liao)(liao)(liao))的(de)(de)修(xiu)飾(shi)液(ye)濃度、修(xiu)飾(shi)方式和(he)涂層(ceng)厚度對電(dian)(dian)池(chi)(chi)(chi)電(dian)(dian)性(xing)(xing)能和(he)安全性(xing)(xing)能的(de)(de)影響,進而優化PTC材(cai)(cai)(cai)(cai)料(liao)(liao)(liao)(liao)(liao)的(de)(de)應(ying)(ying)(ying)用(yong)工(gong)藝(yi)和(he)技術(shu)。目(mu)前,項目(mu)研究成果為熱(re)(re)固性(xing)(xing)聚(ju)合(he)(he)物(wu)材(cai)(cai)(cai)(cai)料(liao)(liao)(liao)(liao)(liao)和(he)PTC材(cai)(cai)(cai)(cai)料(liao)(liao)(liao)(liao)(liao)在(zai)電(dian)(dian)池(chi)(chi)(chi)單(dan)(dan)(dan)體中的(de)(de)應(ying)(ying)(ying)用(yong)提供了(le)工(gong)藝(yi)和(he)技術(shu)指導,解(jie)決了(le)熱(re)(re)固性(xing)(xing)聚(ju)合(he)(he)物(wu)材(cai)(cai)(cai)(cai)料(liao)(liao)(liao)(liao)(liao)和(he)PTC材(cai)(cai)(cai)(cai)料(liao)(liao)(liao)(liao)(liao)在(zai)電(dian)(dian)池(chi)(chi)(chi)單(dan)(dan)(dan)體中應(ying)(ying)(ying)用(yong)的(de)(de)基礎技術(shu)和(he)關(guan)鍵技術(shu),為解(jie)決電(dian)(dian)池(chi)(chi)(chi)單(dan)(dan)(dan)體的(de)(de)熱(re)(re)失控問題奠定(ding)了(le)良好的(de)(de)基礎。
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