Kev ua tau zoo ntawm Lithium{0}}Ion Fais Fab Roj Teeb Li Cas?
Lub hli tas los peb muaj ib tus neeg siv khoom xa rov qab ib pawg ntawm cov hlwb thov "kev ua haujlwm tsis zoo." Thaum peb pab neeg soj ntsuam tau khiav qhov kev kuaj mob, cov hlwb tau zoo - qhov teeb meem yog tias lawv lub cev tawm ntawm 2C tsis tu ncua hauv 40℃ib puag ncig ib puag ncig, ces lawv muab cov txiaj ntsig sib piv cov ntaub ntawv cov lej ntsuas ntawm 0.5C thiab 25℃. Hom kev tsis sib haum no tshwm sim ntau dua li kev lag luam nyiam lees paub, thiab nws taw qhia rau qhov teeb meem tseem ceeb: lithium- ion roj teeb kev ua tau zoo tsis yog ib tus lej. Nws yog qhov chaw teb uas hloov nrog qhov kub thiab txias, thauj khoom profile, lub xeev tus nqi, thiab hnub nyoog.
CC-CV them raws tu qauv- qhov tam sim no rau qhov voltage txwv, tom qab ntawd qhov hluav taws xob tas mus li kom txog thaum tam sim no tapers- yog tus qauv kev coj ua, tab sis qhov tseem ceeb hauv daim ntawv thov yog qhov tsis tu ncua - tam sim no. Qhov ntawd yog qhov uas koj tau txais feem ntau ntawm koj lub peev xwm rov qab sai. Peb tau khiav kev sib piv ntawm 242 Ah NCM hlwb ntawm tus nqi sib txawv: mus ntawm 0.1C txog 0.5C txiav lub sijhawm CC los ntawm 80%. Qhov kev sib pauv yog I²R poob, uas ntsuas nrog tam sim no squared. Rau cov neeg tsav nkoj uas xav tau tsheb rov qab los ntawm txoj kev, qhov kev ua haujlwm tau zoo yog qhov ua tau. Rau ib daim phiaj cia system optimizing puag ncig -trip efficiency mus rau tus lej, nws tsis yog.
Kev ua haujlwm kub yog qhov uas peb siv sijhawm ntau ntawm peb cov kev pabcuam kev pabcuam, tshwj xeeb tshaj yog nrog cov neeg siv khoom nyob rau sab qaum teb huab cua thiab cov khw muag khoom Esxias yav Qab teb sab hnub tuaj -cov teeb meem tsis sib haum, tib lub hauv paus ntsiab lus. Ntawm -20 degree, LFP hlwb poob mus rau ib ncig ntawm 60% muaj peev xwm siv tau. NMC tuav tau zoo dua ntawm kwv yees li 85%, uas yog vim li cas koj pom nws nyob rau hauv hwm EVs ua lag luam rau tag nrho - lub caij siv. Cov txheej txheem tau nkag siab zoo: electrolyte viscosity nce, SEI txheej impedance nce, nqi hloov pauv qeeb ntawm txhua qhov sib cuam tshuam. CATL's Shenxing Pro thov 478 km ntawm 20 feeb ntawm -20℃them (catl.com), uas sawv cev rau qhov kev vam meej ntawm lub hauv ntej.
High -kev ua haujlwm kub ua rau mob taub hau sib txawv. Cells ua haujlwm zoo-qee zaus zoo dua- ntawm 35-40℃, tab sis daim ntawv teev hnub laus nrawm nrawm heev. Peb tau taug qab cov pob khoom hauv kub- huab cua xa tawm uas poob 8-10% muaj peev xwm hauv thawj xyoo piv rau 3-4% rau cov pob khoom zoo tib yam hauv cov huab cua sov. Cov khoom sib xyaw degradation: SEI txheej thickens, siv lithium cov khoom muag, nce impedance, ua kom muaj cua sov ntau dua thaum caij tsheb kauj vab, uas ua rau kom muaj kev puas tsuaj ntxiv. Ib tus neeg siv khoom hauv Middle East tau kawm txog qhov nyuaj no thaum lawv qhov kev lees paub thib ob xyoo dhau los.
Lub voj voog lub neej ntawm cov ntawv teev cov ntaub ntawv xav tias cov xwm txheej tshwj xeeb -feem ntau yog 25℃, 1C / 1C nqi - tso tawm, 100% qhov tob ntawm qhov tso tawm. Hloov txhua qhov sib txawv thiab cov lej hloov pauv loj heev. Peb qhia rau cov neeg siv khoom tias 50% DOD kev ua haujlwm feem ntau txuas ntxiv lub neej voj voog los ntawm 3-5x piv rau qhov tob tob tob. Qhov sib txawv ntawm 500-1,000 cycles ntawm 100% DOD thiab 3,000-5,000 cycles ntawm 50% DOD muaj qhov cuam tshuam loj heev rau tag nrho cov nqi ntawm cov tswv, tab sis nws yuav tsum tau oversizing lub pob, uas ntxiv cov nqi pem hauv ntej thiab qhov hnyav. Engineering yog hais txog kev sib pauv; roj teeb xaiv tsis muaj qhov zam.
Kev nyab xeeb kev ua tau zoo los ntawm thermal stability, thiab thermal stability los ntawm chemistry. LFP tus qauv olivine tuav cov pa atoms nruj heev -thermal decomposition tsis pib txog li ntawm 270 degree, piv rau 210℃rau NMC. Qhov no yog vim li cas LFP cov hlwb dhau qhov kev ntsuam xyuas ntsia hlau nkag mus uas yuav xa siab -nickel hlwb mus rau hauv thermal runaway. Nws yog crystallography, tsis yog kev lag luam. Tuam Tshoj tus tshiab GB38031-2025 tus qauv, pib lub Xya hli ntuj 2026, yuav tsum tau ob teev tsis muaj hluav taws kub thiab tsis tawg tom qab thermal runaway pib. Raws li kev tshawb fawb kev lag luam, kwv yees li 78% ntawm cov tuam txhab lag luam twb tau ua raws li kev siv tshuab (greencarcongress.com). Qhov seem 22% muaj kev ua haujlwm engineering ua ntej lawv.
Kev tsim khoom zoo yog qhov tseem ceeb tshaj li cov neeg yuav khoom feem ntau paub txog-txheej txheej txheej, kom qhuav tiav, tswj kev sib kis. Lub Tsev Kawm Qib Siab Roj Teeb sau tseg tias "tsis muaj txoj hauv kev siv tau los txheeb xyuas txhua yam kev mob ntawm lub roj teeb hauv kev sim luv luv," uas yog vim li cas tus neeg muag khoom taug qab cov ntaub ntawv tseem ceeb nrog rau cov lus qhia tshwj xeeb.
Khoom- xeev, silicon anodes, sodium- ion- cov thev naus laus zis no tau nce qib los ntawm kev sim mus rau kev tsim tawm. Amprius tau pom 500 Wh / kg nrog silicon anodes. CATL's sodium-ion Naxtra ua tiav 175 Wh/kg nrog 10,000- lub neej voj voog. Txawm hais tias cov no hloov pauv kev lag luam hauv peb xyoos lossis tsib xyoos, tam sim no - tiam lithium-ion yuav tseem yog tus neeg ua haujlwm rau feem ntau daim ntawv thov mus txog kaum xyoo no. Lub hnab ntawv kev ua tau zoo txuas ntxiv, tab sis cov ntsiab lus ntawm kev sib txuam ntawm cov yam ntxwv ntawm tes rau cov ntawv thov tsis tau hloov pauv.
