Ib qho kev txhawj xeeb loj tshaj plaws ntawm EVs yog tias cov roj teeb yuav xav tau hloov tom qab ob peb xyoos, ntawm kev siv nyiaj ntau. Tom qab tag nrho, koj lub roj teeb smartphone zoo li yuav pom cov hnub zoo dua hauv tsawg li peb xyoos. Tab sis tus kws tshawb fawb Tesla tau npaj txhij los ncaws lub tswv yim no rau hauv kov ib zaug thiab rau tag nrho, tom qab ua kom pom cov roj teeb uas tuaj yeem ua rau tib neeg feem coob.
Tesla cov neeg txhawb siab yuav zoo li tau hnov ntawm Jeff Dahn lawm. Nws yog tus xibfwb ntawm Dalhousie University thiab tau ua tus koom tes tshawb fawb nrog Tesla txij li xyoo 2016. Nws lub hom phiaj yog txhawm rau ua kom lub zog ceev thiab lub neej ntawm lithium-ion roj teeb, nrog rau txo lawv cov nqi. Dahn zoo li tau ntaus tus niam txiv nrog rau cov npoj yaig ntawm nws pab pawg tshawb fawb. Hauv ib daim ntawv luam tawm nyob rau hauv Phau ntawv Journal ntawm Electrochemical Society, pawg neeg thov kom tau tsim lub roj teeb tsim uas tuaj yeem kav ntev txog 100 xyoo raws li qhov raug cai.
Txaus siab rau EV uas yuav kav ntev txog 100 xyoo thiab 4 lab mais? Ib tus kws tshawb fawb Tesla tej zaum yuav muaj qhov koj … [+]
txais
Dahn daim ntawv sib piv cov hlwb raws li Li[Ni0.5Mn0.3Co0.2]O2 chemistry (“NMC 532”) rau LiFePO4. Cov tom kawg yog "Lithium Iron Phosphate" (aka LFP) chemistry uas Tesla tam sim no siv hauv Suav-tsim qauv Model 3 tsheb tuaj rau Tebchaws Europe. LFP chemistry muaj lub zog qis dua li kev hloov pauv lithium-Ion ntau dua, tab sis pheej yig dua, ruaj khov dua, thiab raug liam tias muaj kev nyab xeeb dua, thiab. LFP tuaj yeem kav ntev txog li 12,000 lub voj voog them nqi, yog li kev ntaus nws hauv qhov no tsis yog qhov ua tau zoo. Dahn's NMC 532 hlwb tsis pom muaj peev xwm poob tom qab ze li 2,000 lub voj voog. Daim ntawv nthuav tawm qhov no los qhia txog 100-xyoo lub neej (lawv pom tseeb tsis tau sim lub roj teeb ntev).
Dahn kuj tau nthuav tawm cov lus tseem ceeb hauv lub Peb Hlis ntawm lub rooj sib tham thoob ntiaj teb roj teeb hauv Orlando, Florida, qhov chaw nws tham txog "4-million-mais roj teeb". Qhov no suav nrog qee qhov kev tshawb pom hauv daim ntawv, ua ntej nws tso tawm lub hlis no. Dahn muaj yav dhau los tau cog lus rau "ntau lab mais roj teeb", thiab tau sim cov hlwb raws li nws cov chemistry hloov kho txij li lub Kaum Hlis 2017. Pom tau tias, lawv tau muaj zog thiab tom qab 4.5 xyoo ntawm kev caij tsheb kauj vab tsis tu ncua ntawm chav tsev kub, lawv tsuas pom 5% degradation. Qhov no txhais tau tias lawv tuaj yeem siv hluav taws xob EV rau 4 lab mais ua ntej yuav tsum tau hloov.
Ib feem ntawm cov laj thawj rau lub neej ntev yog qhov hloov ntawm polycrystalline mus rau ib leeg-crystal cathodes, uas tsis tawg sai heev thaum lub sij hawm them nqi-kho tawm. NMC 532 chemistry Dahn siv qhov sib piv nrog NMC 811 chemistry tam sim no ua haujlwm los ntawm LG Chem, uas muaj yim ntu nickel hauv nws cov cathodes rau txhua feem ntawm manganese thiab cobalt. Xyoo tas los Tesla Model Y hloov los ntawm NMC 811 rau LG Chem's NCMA chemistry hlwb, aka "high nickel". Cov no yog kim piv rau LFP lossis NMC 811 tab sis muab qhov ceev tshaj plaws rau qhov ntev tshaj plaws. NCMA chemistry siv nickel, cobalt, manganese, thiab txhuas rau nws cov cathodes, tab sis feem ntau yog npib tsib xee (89%).
Cov txiv kab ntxwv pob zeb diamond hauv daim duab a) qhia tias NMC 532 chemistry tsis pom muaj peev xwm txo qis … [+]
Jeff Dahn
NMC 532 chemistry Dahn tau sim cog lus rau lwm qhov kev vam meej hauv roj teeb thev naus laus zis. Txawm li cas los xij, tsheb tsis tas yuav kav 100 xyoo, thiab lawv tsis tas yuav mus 4 lab mais ib yam nkaus. Xav txog qhov ntawd lub hnub nyoog nruab nrab ntawm lub tsheb nyob rau hauv Teb Chaws Asmeskas yog 12 xyoo ua 14,000 mais tauj ib xyoos, qhov nruab nrab ntawm lub neej uas tau tsav los ntawm lub tsheb Asmeskas yog 168,000 mais, thiab hauv Tebchaws Europe nws tsawg dua. Yog li, hauv kev muaj tiag, cov roj teeb uas muaj 4-million-mais durability yuav pab tau cov kev siv xws li tsheb-rau-daim phiaj, uas yuav ua rau kom tus nqi them-tso tawm cycling. Tab sis lawv yuav muaj txiaj ntsig zoo tshaj plaws rau cov khoom siv hluav taws xob zoo li qub hauv tsev thiab rau cov kab sib chaws tsis muaj peev xwm los ntawm cov khoom siv txuas ntxiv txuas ntxiv.
Hydrogen enthusiasts feem ntau sib cav hais tias cov roj teeb tsuas yog ib qho chaw nres tsheb kom txog thaum Lub Tsheb Hluav Taws Xob Hluav Taws Xob thiab cov tshuab hydrogen cia ntaus lub ntsiab. Tab sis nrog rau tag nrho cov kev loj hlob tshwm sim nyob rau hauv lub roj teeb technology ua qhov chaw, hydrogen yog zoo li yuav tsawg heev, lig dhau lawm thaum nws los txog rau hauv ntim rau kev thauj mus los. Cov thev naus laus zis zoo li Dahn ua haujlwm nrog, nrog rau lithium sulfur txhim kho xws li los ntawm Theion thiab ultra-ceev them thev naus laus zis xws li StoreDot's, yuav txhais tau hais tias nyob rau hauv ob peb xyoos xwb 'lub sij hawm roj teeb tau daws tag nrho cov teeb meem tawm tsam lawv.
Source: https://www.forbes.com/sites/jamesmorris/2022/05/28/tesla-researcher-demonstrates-100-year-4-million-mile-battery/