Raws li Tesla's Q3 daim ntawv tshaj tawm, lub tuam txhab tab tom hloov mus rau LFP (Lithium Iron Phospate) roj teeb rau tag nrho nws cov qauv qauv Model Y thiab Model 3 tsheb. Tesla tseem npaj siab yuav coj LFP roj teeb ntau lawm rau tib qhov chaw uas nws tsim nws lub tsheb (Giga Texas, Giga Berlin), raws li cov ntaub ntawv tshiab muaj.
"Peb lub hom phiaj yog txhawm rau txheeb xyuas txhua qhov tseem ceeb ntawm cov tsheb nyob rau sab av loj - tsawg kawg yog lub teb chaws, yog tias tsis nyob ze dua, mus rau qhov chaw tsim tsheb," Drew Baglino, tus lwm thawj coj ntawm lub zog hluav taws xob thiab hluav taws xob engineering ntawm Tesla, tau hais thaum Q3 nyiaj tau los hu. "Qhov ntawd yog peb lub hom phiaj. Peb tab tom ua haujlwm sab hauv nrog peb cov neeg xa khoom kom ua tiav lub hom phiaj, thiab tsis yog nyob rau theem kawg ntawm kev sib dhos tab sis kom deb li deb li sai tau."
Kev piav qhia ceev ceev ntawm LFP roj teeb yuav ua raws li hauv qab no: piv rau lwm cov roj teeb uas muaj txiaj ntsig zoo (nickel-cadmium lossis nickel-hlau-hydride), Li-ion roj teeb muaj ntau qhov zoo. Rau qhov pib, lawv muaj ib lub zog siab tshaj plaws ntawm txhua lub roj teeb technology niaj hnub no (100-265 Wh/kg lossis 250-670 Wh/L). Tsis tas li ntawd, Li-ion roj teeb hlwb tuaj yeem xa mus txog 3.6 Volts, 3 zaug siab dua li cov thev naus laus zis xws li Ni-Cd lossis Ni-MH. Qhov no txhais tau hais tias lawv tuaj yeem xa cov tam sim no ntau heev rau kev siv hluav taws xob siab, thiab ntxiv rau Li-ion roj teeb kuj tseem muaj kev saib xyuas qis, tsis tas yuav caij tsheb kauj vab los tswj lawv lub roj teeb.
Lwm qhov zoo dua yog tias cov roj teeb Li-ion tsis muaj "nco nyhuv", cov txheej txheem kev puas tsuaj uas rov ua dua ib feem ntawm kev tso tawm / kev them nqi tuaj yeem ua rau lub roj teeb "nco" qis dua. Qhov no yog qhov zoo dua li Ni-Cd thiab Ni-MH, uas tso tawm cov nyhuv no. Li-ion roj teeb kuj muaj tus nqi qis tus kheej tawm ntawm ib ncig ntawm 1.5-2 feem pua ntawm ib hlis. Lawv tsis muaj tshuaj lom cadmium, uas ua rau lawv yooj yim dua pov tseg dua li Ni-Cd roj teeb.
Lub roj teeb LFP (lithium ferrophosphate), yog ib hom lithium-ion roj teeb uas siv lithium hlau phosphate (LiFePO4) ua cov khoom siv cathode (li no lub npe), thiab cov graphitic carbon electrode nrog cov hlau nplaum ua cov anode. Nws yog ib hom lithium-ion roj teeb uas muaj peev xwm them taus thiab tawm ntawm kev kub ceev piv rau lwm hom roj teeb.
Lub zog ceev ntawm LiFePO yog qis dua lithium cobalt oxide (LiCoO), thiab tseem muaj qhov ua haujlwm qis dua. Tus nqi-tso tawm profiles ntawm LFP hlwb feem ntau tiaj tus. Lub ntsiab drawback ntawm LiFePO yog nws cov hluav taws xob conductivity tsawg. Yog li ntawd, tag nrho cov LiFePO cathodes nyob rau hauv kev txiav txim siab yog tiag tiag LiFePO / C (composite ua nrog carbon). Vim yog tus nqi qis, tsis muaj tshuaj lom, kev ua haujlwm zoo, kev ruaj ntseg mus ntev, thiab lwm yam LiFePO tab tom nrhiav ntau lub luag haujlwm hauv kev siv tsheb, tab sis kuj tseem siv cov khoom siv hluav taws xob nyob ruaj ruaj, thiab lub zog thaub qab.
Cov roj teeb LFP tsis muaj npib tsib xee lossis cobalt, ob qho tib si yog cov khoom siv-kev txwv thiab kim. Raws li nrog lithium, tib neeg txoj cai thiab kev txhawj xeeb ib puag ncig tau raug tsa txog kev siv cobalt. Ib qho tseem ceeb kom zoo dua lwm yam lithium-ion chemistry yog thermal thiab tshuaj lom neeg ruaj khov, uas txhim kho roj teeb kev nyab xeeb. LiFePO yog cov khoom siv cathode muaj kev nyab xeeb dua li LiCoO thiab manganese dioxide spinels los ntawm kev tshem tawm ntawm cobalt, nrog rau nws qhov tsis zoo kub coefficient ntawm kev tiv thaiv uas tuaj yeem txhawb nqa thermal khiav. P-O daim ntawv cog lus nyob rau hauv (PO4)- ion muaj zog dua Co-O daim ntawv cog lus nyob rau hauv (CoO2)- ion, yog li ntawd thaum tsim txom (luv-circuited, overheated, thiab lwm yam), cov pa atoms yog tso tawm maj mam. . Qhov kev ruaj khov ntawm lub zog redox no kuj txhawb nqa ion tsiv teb tsaws sai.
Raws li peb tuaj yeem pom, kev sib xyaw ua ke ntawm tag nrho cov lus tseeb no tau pab Tesla txiav txim siab txav roj teeb los ze zog rau lawv cov chaw tsim khoom tsheb. Raws li Washington Post cov lus hais tias "... qhov kev xav tau zoo, muaj txiaj ntsig thiab muaj tiag. Rau ib qho, cov no tsis yog cov roj teeb pheej yig dua xwb; lawv muaj kev nyab xeeb dua thiab yooj yim siv. Qhov ntawd txhais tau tias txawm tias lawv tsis mus coj Teslas. Ntau pua mais deb ntawm ib tus nqi, lawv yuav tsav lub tuam txhab mus rau kev muag khoom ntau dua thiab, thaum kawg, kev siv dav dav ntawm cov tsheb ntsuab. Ib Tesla Model 3 ntawm cov lithium hlau-phosphate, lossis LFP, cov khoom siv hluav taws xob tseem tuaj yeem mus txog 468 mais (290 mais. ). Qhov ntawd tsis yog qhov luv luv - cov roj teeb no yuav ua haujlwm. "
Ntawm qee qhov taw tes hauv 2022 Tesla yuav tuaj yeem pib ua haujlwm ntawm nws tus kheej 4680 roj teeb hlwb thiab pob khoom rau Model Y thiab Model 3 uas yuav tsim nyob rau hauv Texas thiab hauv Berlin, raws li kuv tau hais ua ntej; thiab tej zaum lawv yuav siv lawv cov kev daws teeb meem tam sim no nrog rau 2170- hom hlwb kom txog thaum kev tsim khoom tiav.
Nico Caballero yog VP ntawm Nyiaj Txiag ntawm Cogency Power, tshwj xeeb hauv hnub ci zog. Nws kuj tau txais daim Diploma hauv Hluav Taws Xob Tsheb los ntawm Delft University of Technology hauv Netherlands, thiab nyiam ua kev tshawb fawb txog Tesla thiab EV roj teeb. Nws tuaj yeem hu tau ntawm @NicoTorqueNews ntawm Twitter. Nico npog Tesla thiab hluav taws xob tsheb tshiab tshwm sim ntawm Torque Xov Xwm.
