Namuhla, izinkampani ezihlukahlukene zezimoto zisebenzisa amabhethri e-lithium ngezinga elikhulu emabhethri anamandla, futhi ukuminyana kwamandla kuya ngokuya kukhuphuka, kodwa abantu basanemibala ngokuphepha kwamabhethri, futhi akusona isisombululo esihle sokuphepha kwebhethri. amabhethri.I-Thermal Runaway iyinhloko yocwaningo yokuphepha kwebhethri yamandla, futhi kufanelekile ukugxila kuyo.
Okokuqala, ake siqonde ukuthi yini i-thermal runaway.I-Thermal Runaway yinto yokusabela kweketango ebangelwa izibangeli ezihlukahlukene, okuholela enanini elikhulu lokushisa namagesi ayingozi akhishwa ibhethri phakathi nesikhathi esifushane, angabangela nokuba ibhethri libambe umlilo futhi liqhume ezimeni ezibucayi.Kunezizathu eziningi zokuvela kokushisa okushisayo, njengokushisisa ngokweqile, ukushaja ngokweqile, ukujikeleza okufushane kwangaphakathi, ukushayisana, njll. ye-diaphragm, okuholela e-electrode engalungile kanye ne-electrolyte, kulandelwa ukubola kwakho kokubili i-electrode eqondile kanye ne-electrolyte, ngaleyo ndlela kubangele i-short circuit yangaphakathi enkulu, okubangela ukushisa kwe-electrolyte, ebese isakazekela kwamanye amaseli, okubangela ukubaleka okushisayo okukhulu nokuvumela lonke iphakethe lebhethri ukuthi likhiqize ukusha okuzenzakalelayo.
Izimbangela zokubaleka okushisayo zingahlukaniswa zibe yizimbangela zangaphakathi nangaphandle.Izimbangela zangaphakathi zivame ukubangelwa amasekethe amafushane angaphakathi;izimbangela zangaphandle kungenxa yokuhlukunyezwa kwemishini, ukusetshenziswa kabi kukagesi, ukuhlukunyezwa kokushisa, njll.
Isekhethi yangaphakathi emfishane, okuwukuxhumana okuqondile phakathi kwamatheminali aphozithivu nenegethivu ebhethri, iyahlukahluka kakhulu ngezinga lokuxhumana kanye nokusabela okulandelwayo okucushiwe.Ngokuvamile isifunda esikhulu sangaphakathi esifushane esibangelwa ukuhlukumeza komshini kanye nokushisa kuzobangela ngokuqondile ukubaleka okushisayo.Ngokuphambene, amasekhethi amafushane angaphakathi azenzela ngokwawo mancane uma kuqhathaniswa, futhi ukushisa okukhiqizayo kuncane kangangokuthi akuqalisi ngokushesha ukuphuma kokushisa.Ukuzithuthukisa kwangaphakathi kuvame ukuhlanganisa amaphutha okukhiqiza, ukuwohloka kwezakhiwo ezahlukahlukene okubangelwa ukuguga kwebhethri, njengokunyuka ukumelana kwangaphakathi, idiphozithi yensimbi ye-lithium ebangelwa ukusetshenziswa kabi okuthambile kwesikhathi eside, njll. Njengoba isikhathi sinqwabelana, ingozi yokujikeleza okufushane kwangaphakathi okubangelwa lokho izimbangela zangaphakathi zizokhula kancane kancane.
Ukuhlukumeza ngomshini, kubhekisela ekushintshashintsheni kwebhethri le-lithium monomer kanye nephakethe lebhethri ngaphansi kwesenzo samandla angaphandle, kanye nokugudluzwa okuhlobene kwezingxenye zayo ezihlukene.Amafomu amakhulu ngokumelene neseli kagesi ahlanganisa ukungqubuzana, ukukhishwa kanye nokubhoboza.Isibonelo, into yangaphandle ethintwe imoto ngesivinini esiphezulu iholele ngokuqondile ekugoqekeni kwe-diaphragm yangaphakathi yebhethri, yona edale ukujikeleza okufushane ngaphakathi kwebhethri futhi yabangela ukusha okuzenzakalelayo phakathi nesikhathi esifushane.
Ukusetshenziswa kabi kukagesi kwamabhethri e-lithium ngokuvamile kuhlanganisa ukujikeleza okufushane kwangaphandle, ukushajwa ngokweqile, ukukhulula izinhlobo ezimbalwa, okungenzeka ukuthi kuthuthuke kube indlela eshisayo yokushaja ngokweqile.Isifunda esifushane sangaphandle senzeka lapho amakhondakta amabili anengcindezi ehlukile exhunywe ngaphandle kweseli.Izikhindi zangaphandle emaphaketheni ebhethri zingabangelwa ukuguga okubangelwa ukushayisana kwezimoto, ukucwiliswa emanzini, ukungcoliswa kwekhondatha noma ukushaqeka kukagesi ngesikhathi sokulungiswa.Ngokuvamile, ukushisa okukhishwe kumjikelezo omfishane wangaphandle akushisi ibhethri ngokuphambene nokubhoboza.Isixhumanisi esibalulekile phakathi kwesifunda esifushane sangaphandle kanye nokubaleka okushisayo izinga lokushisa elifinyelela endaweni yokushisa ngokweqile.Kulapho ukushisa okukhiqizwa isifunda esifushane sangaphandle kungakwazi ukuhlakazeka kahle lapho izinga lokushisa lebhethri liyenyuka futhi izinga lokushisa eliphezulu libangele ukubaleka kwe-thermal.Ngakho-ke, ukusika i-short-circuit current noma ukuqeda ukushisa okweqile kuyizindlela zokuvimbela i-short circuit yangaphandle ekukhiqizeni omunye umonakalo.Ukushaja ngokweqile, ngenxa yokugcwala kwawo amandla, kungenye yezingozi eziphakeme kakhulu zokusetshenziswa kabi kukagesi.Ukukhiqizwa kokushisa negesi yizici ezimbili ezivamile zenqubo yokushaja ngokweqile.Ukukhiqiza ukushisa kuvela ekushiseni kwe-ohmic nokusabela okuseceleni.Okokuqala, i-lithium dendrites ikhula endaweni ye-anode ngenxa yokushumeka kwe-lithium ngokweqile.
Izinyathelo zokuvikela ukugijima kwe-thermal:
Esigabeni sokushisa okuzenzelayo ukuze kuvinjwe ukugijima okushisayo kwenkango, sinezinketho ezimbili, eyodwa ukuthuthukisa nokuthuthukisa impahla ewumgogodla, ingqikithi ye-thermal runaway ikakhulukazi ilele ekuzinzeni kwezinto ezibonakalayo ze-electrode ezinhle nezimbi futhi i-electrolyte.Esikhathini esizayo, sidinga futhi ukwenza ukuphumelela okuphezulu ekuhlanganiseni kwezinto ezibonakalayo ze-cathode, ukuguqulwa, ukuhambisana kwe-electrolyte e-homogeneous kanye ne-electrode, kanye nokwenza ngcono ukuqhutshwa kwe-thermal ye-core.Noma khetha i-electrolyte ngokuphepha okuphezulu ukuze udlale umthelela we-flame retardant.Okwesibili, kuyadingeka ukwamukela izixazululo ezisebenzayo zokuphatha ukushisa (I-PTC Coolant heater/ I-PTC Air heater) kusuka ngaphandle ukucindezela ukuphakama kwezinga lokushisa kwebhethri ye-Li-ion, ukuze kuqinisekiswe ukuthi ifilimu ye-SEI yeseli ngeke ikhuphuke ekushiseni kokuhlakazeka, futhi ngokwemvelo, ukubalekela okushisayo ngeke kwenzeke.
Isikhathi sokuthumela: Mar-17-2023
