Ukulawula kanjani ukulahlekelwa okushisayo kwamabhethri e-lithium ion?

2022/04/08

Umbhali :Iflowpower -Umhlinzeki Wesiteshi Samandla Esiphathekayo

1. I-Electrolytic liquid flame retardant electrolyte flame retardant iyindlela ephumelela kakhulu yokunciphisa ukuphuma kwebhethri okushisayo, kodwa lezi zinciphisi zamalangabi zivame ukuba nomthelela omkhulu kuzakhiwo ze-electrochemical zamabhethri e-lithium ion, ngakho kunzima ukuzisebenzisa ngempela. Ukuze kuxazululwe le nkinga, ithimba le-Yuqiao laseSheng Diego, eCalifornia, eChina [1] ligcina i-DBA (dibenzylamine) evimbela ilangabi phakathi kwama-microcapsules esimweni sephakheji le-capsule, ukuhlakazeka ku-electrolyte, ngeke Nini izakhiwo zikagesi zebhethri ye-lithium-ion, i-flame retardant kulawa ma-capsules izokhululwa lapho ibhethri libhujiswa yi-extrusion, futhi ibhethri ibangele ukwehluleka kwebhethri, ngaleyo ndlela ukuvela kokulahlekelwa ukushisa.

Ithimba le-Yuqiao lika-2018 [2] liphinde lisebenzisa le nqubo engenhla, i-ethylene glycol ne-ethylenediamine isetshenziswa njenge-flame retardant, futhi ingxenye yangaphakathi yebhethri ye-lithium ion ilayishwe ebhethrini le-lithium-ion yehle ngo-70% ekuhlolweni kwe-acupuncture. . Kunciphise kakhulu ubungozi bokungalawuleki kokushisa kwamabhethri e-lithium ion. Indlela eshiwo ngenhla iwukuzibhubhisa, okungukuthi, uma isinqamuleli somlilo sesisetshenzisiwe, lonke ibhethri le-lithium-ion lizochithwa, futhi ithimba le-Atsuoyamada laseTokyo University, eJapane [3] lenze uhlobo lomphumela we-lithium Flame. i-electrolyte eyi-retardant yezakhiwo zebhethri ye-ion, isixazululo se-electrolytic sisebenzisa ukugxila okuphezulu kwe-NaN (SO2F) 2 (Nafsa) orlin (SO2F) 2 (LIFSA) njengosawoti we-lithium, kanye ne-flame retardant evamile yengezwa lapho.

I-ester TMP ikwandisa kakhulu ukuzinza okushisayo kwebhethri ye-lithium ion, enamandla kakhulu. Ukwengezwa kwe-flame retardant akuphazamisi ukusebenza komjikelezo webhethri ye-lithium ion, futhi ibhethri yamukela i-electrolyte ingasakazwa ngokuzinzile izikhathi ezingaphezu kuka-1000 (C / 5) izikhathi ezingu-1200 ekujikelezeni, izinga lokugcinwa kwamandla 95%). Ngokusebenzisa okungeziwe, ibhethri ye-lithium ion inesici sokubuyiswa komlilo ingenye yezindlela zokulahlekelwa ukushisa kwebhethri ye-lithium ion, futhi abanye abantu banenye indlela, bezama ukwenzeka i-short-circuited ebhethri ye-lithium-ion kusukela empandeni. yezimpande, ngaleyo ndlela kufezwe inhloso phansi kwegedlela, Susa Ngokuphelele ukuvela kokushisa okungalawuleki.

Endabeni yebhethri ye-lithium-ion enamandla, ingase ibhekane nomthelela wodlame uma isetshenziswa. U-Gabrielm.veith we-American Oak Ridge National Laboratory uklame i-electrolyte enezici zokuqina kwe-shear [4], i-electrolyte isebenzisa okungeyona i-Newton Uketshezi lubonakala, esimweni esivamile, i-electrolyte yethulwa isesimweni soketshezi, kodwa esimweni esivamile. umthelela ongazelelwe, isimo esiqinile sivezwa, siba siqine ngendlela engavamile, futhi singakwazi ngisho nokufeza umphumela we-bulletproof, kusukela kusixwayiso sempande emandleni e-lithium Ingozi ye-short-circuit ebangelwa ukushisa kwebhethri lapho i-ion ibhethri liyashayisa.

2. Isakhiwo sebhethri Okulandelayo, sizobona indlela yokunikeza ukushisa ngaphandle kokulawula, futhi ibhethri ye-lithium-ion yamanje icubungula inkinga yokungalawuleki kwe-thermal ekwakhiweni kwesakhiwo, njengebhethri le-18650. Kuzoba khona i-valve yokukhulula ingcindezi kukhava, futhi ingakhululwa ngesikhathi lapho ukushisa kungalawuleki, futhi kuzoba ne-coefficient yokushisa ephozithivu impahla kukhava yebhethri yesibili ephezulu.

Ukumelana nogesi kwezinto ze-PTC kukhuphuke kakhulu ngesikhathi sokushisa kokulahlekelwa ukushisa. Okukhulu ukunciphisa ukuncishiswa kwamanje. Ngaphezu kwalokho, ekwakhiweni kwesakhiwo seseli, cabanga ngomklamo wesifunda esifushane phakathi kwama-electrode alungile noma angalungile, futhi isixwayiso sibangelwa amaphutha, futhi izinto zensimbi ngokweqile zenza ibhethri libe nesifunda esifushane sangaphandle, okubangela izingozi zokuphepha. .

Okwesibili, lapho ibhethri lakhiwe, kusetshenziswa i-diaphragm evikeleke kakhudlwana, isibonelo, i-diaphragm enezingqimba ezintathu ye-shuttle ezenzakalelayo emazingeni okushisa aphezulu, kodwa eminyakeni yamuva nje, ngokuthuthuka okuqhubekayo kwamandla ebhethri, i-diaphragm enezingqimba ezintathu. bekulokhu I-ceramic coating diaphragm eyasuswa kancane kancane, i-ceramic coating ingasetshenziswa ukusekela i-diaphragm, ukunciphisa ukuncipha kwesihlukanisi ekushiseni okuphezulu, ukuthuthukisa ukuzinza okushisayo kwebhethri ye-lithium ion, ukunciphisa ingozi yokushisa ngaphandle kokulawula. amabhethri e-lithium ion. 3. Idizayini yokuphepha kokushisa kwephakethe lebhethri Ibhethri lamandla e-lithium-ion livamise ukusuka emashumini, amakhulu noma ezinkulungwaneni zamabhethri ahlanganiswe ngokuhambisana, njengamaphakethe ebhethri e-Tesla's Models.

Ngaphezu kuka-7,000 18650, uma elinye lamabhethri lingalawuleki, lingase lisakazeke kuphakethe lebhethri, kubangele imiphumela emibi. Ngokwesibonelo, ngo-January 2013, inkampani yase-Japan yase-Boston, e-U.S.A., inkampani yaseJapane, iyinhlolovo ye-US National Transport Safety Commission, ngenxa yebhethri ye-lithium-ion yesikwele engu-75AH ephaketheni lebhethri. Ngemuva kokuthi ukushisa kwebhethri okuseduze kungalawuleki, i-Boeing idinga izinyathelo zokwengeza ukusabalala okuphuma ekulawuleni okushisayo kuwo wonke amaphakethe ebhethri.

Ukuze uvimbele ukuphuma ekulawuleni okushisayo ngaphakathi kwebhethri ye-lithium ion, i-US AllCelltechnology isungule ibhethri ye-lithium-ion yebhethri eshisayo ephuma ngaphandle kokulawula okusekelwe ezintweni zokushintsha isigaba [5]. Izinto ze-PCC zigcwaliswa phakathi kwebhethri le-lithium ion le-monomer, futhi lapho iphakethe lebhethri le-lithium ion livamile, ukushisa kwephakethe lebhethri kungadluliselwa ngokushesha kuphakethe lebhethri ngokusebenzisa impahla ye-PCC, futhi impahla ye-PCC iku-ion ye-lithium. ibhethri. Ingancibilika ngezinto zikapharafini lapho isetshenziselwa khona ukumunca ukushisa okukhulu, kuvimbele izinga lokushisa lebhethri ukuthi liqhubeke likhuphuka, ukuze ukushisa kungapheli ephaketheni lebhethri.

Ekuhlolweni kwe-acupuncture, iphakethe lebhethri elipakishwe lisuka kumabhethri angu-18650, futhi uma ingekho into ye-PCC, ibhethri elishisayo eliphuma ekulawuleni ekugcineni lizoholela kumabhethri angu-20 kuphakethe lebhethri, futhi lisebenzise izinto ze-PCC. Ephaketheni lebhethri, i-thermal yebhethri engalawuleki ayiwaqali amanye amaphakethe ebhethri. .

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