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(dong)力電(dian)池(chi)熱安全(quan)問題是影響電(dian)動(dong)汽車行駛安全(quan)的(de)關(guan)鍵。在國家重點研(yan)發計劃(hua)“新能源汽車”專項2016年度立(li)項項目“高(gao)比(bi)能量動(dong)力鋰離(li)子電(dian)池(chi)開發與(yu)產業化技術攻(gong)關(guan)”的(de)實施中，研(yan)發團(tuan)隊針(zhen)對高(gao)比(bi)能量鋰離(li)子動(dong)力電(dian)池(chi)熱安全(quan)機理和安全(quan)設計開展了(le)深(shen)入研(yan)究，目前取得了(le)階段(duan)性進展。
項目(mu)團隊圍繞鋰(li)離子電(dian)(dian)池(chi)(chi)在充(chong)放電(dian)(dian)過程(cheng)中(zhong)的(de)(de)產熱(re)(re)(re)(re)過程(cheng)、各(ge)成分的(de)(de)熱(re)(re)(re)(re)穩(wen)(wen)定(ding)(ding)性(xing)，以1Ah鋰(li)離子電(dian)(dian)池(chi)(chi)單體(ti)為(wei)研(yan)究對(dui)象，通過實驗(yan)獲得(de)表觀(guan)導熱(re)(re)(re)(re)系數、各(ge)向異性(xing)導熱(re)(re)(re)(re)系數、恒(heng)壓比熱(re)(re)(re)(re)容、溫度(du)系數及(ji)室溫內阻，從而計算出生熱(re)(re)(re)(re)速率。定(ding)(ding)性(xing)分析了(le)電(dian)(dian)池(chi)(chi)在100%電(dian)(dian)量(liang)和(he)0%電(dian)(dian)量(liang)兩個狀態(tai)下正負(fu)極(ji)材料的(de)(de)熱(re)(re)(re)(re)穩(wen)(wen)定(ding)(ding)性(xing)以及(ji)電(dian)(dian)解液對(dui)其熱(re)(re)(re)(re)穩(wen)(wen)定(ding)(ding)性(xing)的(de)(de)影響。在電(dian)(dian)池(chi)(chi)的(de)(de)熱(re)(re)(re)(re)失控(kong)部分采用加速量(liang)熱(re)(re)(re)(re)方法對(dui)100%電(dian)(dian)量(liang)的(de)(de)軟包(bao)鋰(li)離子電(dian)(dian)池(chi)(chi)進行熱(re)(re)(re)(re)失控(kong)實驗(yan)，確(que)定(ding)(ding)了(le)電(dian)(dian)池(chi)(chi)的(de)(de)熱(re)(re)(re)(re)失控(kong)起始溫度(du)、最高(gao)溫度(du)以及(ji)自升溫速率。相(xiang)關研(yan)究成果和(he)試(shi)驗(yan)結果為(wei)動力(li)電(dian)(dian)池(chi)(chi)的(de)(de)熱(re)(re)(re)(re)安全結構設計提供了(le)理(li)論和(he)數據基礎。
該(gai)項目(mu)團(tuan)隊(dui)圍(wei)繞熱固性(xing)(xing)聚(ju)合物(wu)(wu)材(cai)料(liao)(liao)(liao)(liao)(liao)(liao)和(he)正溫度(du)系數熱敏材(cai)料(liao)(liao)(liao)(liao)(liao)(liao)（PTC材(cai)料(liao)(liao)(liao)(liao)(liao)(liao)）在電(dian)池(chi)(chi)(chi)單(dan)體中(zhong)的(de)(de)應(ying)(ying)(ying)用(yong)(yong)(yong)(yong)工藝(yi)與技術，結合理化分析測(ce)試(shi)(shi)、電(dian)化學(xue)測(ce)試(shi)(shi)、電(dian)性(xing)(xing)能(neng)測(ce)試(shi)(shi)和(he)電(dian)池(chi)(chi)(chi)安全(quan)性(xing)(xing)能(neng)測(ce)試(shi)(shi)等手(shou)段(duan)，研究(jiu)了(le)熱固性(xing)(xing)聚(ju)合物(wu)(wu)材(cai)料(liao)(liao)(liao)(liao)(liao)(liao)在電(dian)池(chi)(chi)(chi)中(zhong)的(de)(de)應(ying)(ying)(ying)用(yong)(yong)(yong)(yong)工藝(yi)，達到了(le)優化應(ying)(ying)(ying)用(yong)(yong)(yong)(yong)工藝(yi)流程的(de)(de)目(mu)的(de)(de)；研究(jiu)了(le)正溫度(du)系數熱敏材(cai)料(liao)(liao)(liao)(liao)(liao)(liao)（PTC材(cai)料(liao)(liao)(liao)(liao)(liao)(liao)）的(de)(de)修飾(shi)(shi)液(ye)濃(nong)度(du)、修飾(shi)(shi)方式和(he)涂層厚(hou)度(du)對電(dian)池(chi)(chi)(chi)電(dian)性(xing)(xing)能(neng)和(he)安全(quan)性(xing)(xing)能(neng)的(de)(de)影響，進(jin)而(er)優化PTC材(cai)料(liao)(liao)(liao)(liao)(liao)(liao)的(de)(de)應(ying)(ying)(ying)用(yong)(yong)(yong)(yong)工藝(yi)和(he)技術。目(mu)前(qian)，項目(mu)研究(jiu)成(cheng)果為熱固性(xing)(xing)聚(ju)合物(wu)(wu)材(cai)料(liao)(liao)(liao)(liao)(liao)(liao)和(he)PTC材(cai)料(liao)(liao)(liao)(liao)(liao)(liao)在電(dian)池(chi)(chi)(chi)單(dan)體中(zhong)的(de)(de)應(ying)(ying)(ying)用(yong)(yong)(yong)(yong)提(ti)供了(le)工藝(yi)和(he)技術指(zhi)導，解(jie)決(jue)了(le)熱固性(xing)(xing)聚(ju)合物(wu)(wu)材(cai)料(liao)(liao)(liao)(liao)(liao)(liao)和(he)PTC材(cai)料(liao)(liao)(liao)(liao)(liao)(liao)在電(dian)池(chi)(chi)(chi)單(dan)體中(zhong)應(ying)(ying)(ying)用(yong)(yong)(yong)(yong)的(de)(de)基(ji)礎技術和(he)關(guan)鍵技術，為解(jie)決(jue)電(dian)池(chi)(chi)(chi)單(dan)體的(de)(de)熱失(shi)控(kong)問題(ti)奠定了(le)良(liang)好(hao)的(de)(de)基(ji)礎。
項目(mu)團隊圍繞鋰(li)離子電(dian)(dian)池(chi)(chi)在充(chong)放電(dian)(dian)過程(cheng)中(zhong)的(de)(de)產熱(re)(re)(re)(re)過程(cheng)、各(ge)成分的(de)(de)熱(re)(re)(re)(re)穩(wen)(wen)定(ding)(ding)性(xing)，以1Ah鋰(li)離子電(dian)(dian)池(chi)(chi)單體(ti)為(wei)研(yan)究對(dui)象，通過實驗(yan)獲得(de)表觀(guan)導熱(re)(re)(re)(re)系數、各(ge)向異性(xing)導熱(re)(re)(re)(re)系數、恒(heng)壓比熱(re)(re)(re)(re)容、溫度(du)系數及(ji)室溫內阻，從而計算出生熱(re)(re)(re)(re)速率。定(ding)(ding)性(xing)分析了(le)電(dian)(dian)池(chi)(chi)在100%電(dian)(dian)量(liang)和(he)0%電(dian)(dian)量(liang)兩個狀態(tai)下正負(fu)極(ji)材料的(de)(de)熱(re)(re)(re)(re)穩(wen)(wen)定(ding)(ding)性(xing)以及(ji)電(dian)(dian)解液對(dui)其熱(re)(re)(re)(re)穩(wen)(wen)定(ding)(ding)性(xing)的(de)(de)影響。在電(dian)(dian)池(chi)(chi)的(de)(de)熱(re)(re)(re)(re)失控(kong)部分采用加速量(liang)熱(re)(re)(re)(re)方法對(dui)100%電(dian)(dian)量(liang)的(de)(de)軟包(bao)鋰(li)離子電(dian)(dian)池(chi)(chi)進行熱(re)(re)(re)(re)失控(kong)實驗(yan)，確(que)定(ding)(ding)了(le)電(dian)(dian)池(chi)(chi)的(de)(de)熱(re)(re)(re)(re)失控(kong)起始溫度(du)、最高(gao)溫度(du)以及(ji)自升溫速率。相(xiang)關研(yan)究成果和(he)試(shi)驗(yan)結果為(wei)動力(li)電(dian)(dian)池(chi)(chi)的(de)(de)熱(re)(re)(re)(re)安全結構設計提供了(le)理(li)論和(he)數據基礎。
該(gai)項目(mu)團(tuan)隊(dui)圍(wei)繞熱固性(xing)(xing)聚(ju)合物(wu)(wu)材(cai)料(liao)(liao)(liao)(liao)(liao)(liao)和(he)正溫度(du)系數熱敏材(cai)料(liao)(liao)(liao)(liao)(liao)(liao)（PTC材(cai)料(liao)(liao)(liao)(liao)(liao)(liao)）在電(dian)池(chi)(chi)(chi)單(dan)體中(zhong)的(de)(de)應(ying)(ying)(ying)用(yong)(yong)(yong)(yong)工藝(yi)與技術，結合理化分析測(ce)試(shi)(shi)、電(dian)化學(xue)測(ce)試(shi)(shi)、電(dian)性(xing)(xing)能(neng)測(ce)試(shi)(shi)和(he)電(dian)池(chi)(chi)(chi)安全(quan)性(xing)(xing)能(neng)測(ce)試(shi)(shi)等手(shou)段(duan)，研究(jiu)了(le)熱固性(xing)(xing)聚(ju)合物(wu)(wu)材(cai)料(liao)(liao)(liao)(liao)(liao)(liao)在電(dian)池(chi)(chi)(chi)中(zhong)的(de)(de)應(ying)(ying)(ying)用(yong)(yong)(yong)(yong)工藝(yi)，達到了(le)優化應(ying)(ying)(ying)用(yong)(yong)(yong)(yong)工藝(yi)流程的(de)(de)目(mu)的(de)(de)；研究(jiu)了(le)正溫度(du)系數熱敏材(cai)料(liao)(liao)(liao)(liao)(liao)(liao)（PTC材(cai)料(liao)(liao)(liao)(liao)(liao)(liao)）的(de)(de)修飾(shi)(shi)液(ye)濃(nong)度(du)、修飾(shi)(shi)方式和(he)涂層厚(hou)度(du)對電(dian)池(chi)(chi)(chi)電(dian)性(xing)(xing)能(neng)和(he)安全(quan)性(xing)(xing)能(neng)的(de)(de)影響，進(jin)而(er)優化PTC材(cai)料(liao)(liao)(liao)(liao)(liao)(liao)的(de)(de)應(ying)(ying)(ying)用(yong)(yong)(yong)(yong)工藝(yi)和(he)技術。目(mu)前(qian)，項目(mu)研究(jiu)成(cheng)果為熱固性(xing)(xing)聚(ju)合物(wu)(wu)材(cai)料(liao)(liao)(liao)(liao)(liao)(liao)和(he)PTC材(cai)料(liao)(liao)(liao)(liao)(liao)(liao)在電(dian)池(chi)(chi)(chi)單(dan)體中(zhong)的(de)(de)應(ying)(ying)(ying)用(yong)(yong)(yong)(yong)提(ti)供了(le)工藝(yi)和(he)技術指(zhi)導，解(jie)決(jue)了(le)熱固性(xing)(xing)聚(ju)合物(wu)(wu)材(cai)料(liao)(liao)(liao)(liao)(liao)(liao)和(he)PTC材(cai)料(liao)(liao)(liao)(liao)(liao)(liao)在電(dian)池(chi)(chi)(chi)單(dan)體中(zhong)應(ying)(ying)(ying)用(yong)(yong)(yong)(yong)的(de)(de)基(ji)礎技術和(he)關(guan)鍵技術，為解(jie)決(jue)電(dian)池(chi)(chi)(chi)單(dan)體的(de)(de)熱失(shi)控(kong)問題(ti)奠定了(le)良(liang)好(hao)的(de)(de)基(ji)礎。
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