Txij li thaum lub roj teeb lithium-ion nkag mus rau hauv kev lag luam, nws tau siv dav vim nws qhov zoo xws li lub neej ntev, muaj peev xwm loj thiab tsis muaj kev nco. Kev siv cov roj teeb lithium-ion kub tsawg muaj teeb meem xws li lub peev xwm tsis tshua muaj peev xwm, kev txo qis, kev ua haujlwm tsis zoo, kev hloov pauv lithium pom tseeb, thiab tsis sib npaug lithium deintercalation. Txawm li cas los xij, nrog kev nthuav dav ntxiv ntawm thaj chaw thov, cov kev txwv coj los ntawm kev ua haujlwm qis ntawm lithium-ion roj teeb tau dhau los ua qhov pom tseeb dua.
Raws li cov lus ceeb toom, lub peev xwm tso tawm ntawm lithium-ion roj teeb ntawm -20 ° C tsuas yog kwv yees li 31.5% ntawm qhov kub ntawm chav tsev. Kev ua haujlwm kub ntawm cov roj teeb lithium-ion ib txwm nyob nruab nrab ntawm -20 txog +60 ° C. Txawm li cas los xij, hauv thaj chaw ntawm aerospace, kev lag luam tub rog, thiab tsheb fais fab, cov roj teeb yuav tsum ua haujlwm ib txwm nyob ntawm -40 ° C. Yog li ntawd, kev txhim kho qhov ntsuas kub qis ntawm lithium-ion roj teeb yog qhov tseem ceeb heev.
Cov yam ntxwv txwv tsis pub muaj qhov kub thiab txias ntawm lithium-ion roj teeb:
1. Nyob rau hauv ib puag ncig uas tsis muaj qhov kub thiab txias, qhov viscosity ntawm cov electrolyte nce, los yog ib nrab solidifies, ua rau txo qis hauv cov conductivity ntawm lithium-ion roj teeb.
2. Kev sib raug zoo ntawm cov electrolyte, qhov tsis zoo electrode thiab cov diaphragm ua rau tsis zoo nyob rau hauv ib puag ncig uas tsis tshua muaj kub.
3. Nyob rau hauv ib puag ncig uas tsis tshua muaj kub, lithium-ion roj teeb tsis zoo electrodes yog hnyav heev, thiab cov precipitated hlau lithium reacts nrog cov electrolyte, thiab cov khoom deposition ua rau cov thickness ntawm cov khoom electrolyte interface (SEI) nce.
4. Nyob rau hauv ib puag ncig uas tsis tshua muaj kub, lub diffusion system ntawm lithium ion roj teeb nyob rau hauv cov khoom nquag txo qis, thiab tus nqi hloov pauv tsis kam (Rct) nce ntau.
Kev sib tham txog yam cuam tshuam rau kev ua haujlwm ntawm qhov kub thiab txias ntawm lithium-ion roj teeb:
Cov kws tshaj lij lub tswv yim 1: Cov electrolyte muaj qhov cuam tshuam loj tshaj plaws ntawm kev ua haujlwm kub ntawm cov roj ntsha lithium-ion, thiab cov khoom muaj pes tsawg leeg thiab lub cev thiab tshuaj lom neeg ntawm cov electrolyte muaj qhov cuam tshuam tseem ceeb rau kev ua haujlwm kub ntawm lub roj teeb. Cov teeb meem tshwm sim los ntawm lub voj voog roj teeb ntawm qhov kub qis yog: viscosity ntawm electrolyte yuav nce, thiab ion conduction ceev yuav qeeb, uas ua rau muaj kev tsis sib haum xeeb hauv electron tsiv teb tsaws ceev ntawm sab nraud Circuit Court. Yog li ntawd, lub roj teeb yuav raug polarized hnyav heev thiab tus nqi thiab lub peev xwm tawm yuav poob qis heev. Tshwj xeeb tshaj yog thaum them nyiaj ntawm qhov kub qis, lithium ions tuaj yeem yooj yim tsim lithium dendrites rau ntawm qhov chaw ntawm cov electrode tsis zoo, ua rau lub roj teeb tsis zoo.
Qhov kub tsis tshua muaj kev ua haujlwm ntawm electrolyte yog ze ze rau qhov conductivity ntawm electrolyte nws tus kheej. Lub siab conductivity ntawm electrolyte thauj ions sai dua, thiab nws tuaj yeem ua kom muaj peev xwm ntau dua ntawm qhov kub thiab txias. Qhov ntau dua lithium ntsev nyob rau hauv cov electrolyte dissociated, qhov ntau ntawm kev tsiv teb tsaws thiab cov conductivity ntau dua. Qhov siab dua ntawm cov hluav taws xob conductivity, qhov ceev ntawm ion conductivity, qhov me dua polarization, thiab qhov ua tau zoo ntawm lub roj teeb ntawm qhov kub thiab txias. Yog li ntawd, kev siv hluav taws xob ntau dua yog qhov tsim nyog rau kev ua tiav qhov kev ua tau zoo ntawm cov roj teeb lithium-ion.
Lub conductivity ntawm cov electrolyte muaj feem xyuam rau cov muaj pes tsawg leeg ntawm cov electrolyte, thiab txo cov viscosity ntawm cov kuab tshuaj yog ib txoj hauv kev los txhim kho cov conductivity ntawm electrolyte. Qhov zoo ntawm cov kuab tshuaj ntawm qhov kub thiab txias yog qhov lav ntawm ion thauj, thiab cov khoom electrolyte membrane tsim los ntawm cov electrolyte ntawm cov electrode tsis zoo ntawm qhov kub thiab txias kuj yog tus yuam sij rau cuam tshuam lithium ion conduction, thiab RSEI yog lub ntsiab impedance ntawm lithium. ion roj teeb nyob rau hauv qhov kub thiab txias.
Cov kws tshaj lij lub tswv yim 2: Qhov tseem ceeb tshaj plaws txwv qhov ntsuas kub qis ntawm lithium-ion roj teeb yog qhov ua kom muaj zog Li + diffusion tsis kam ntawm qhov kub qis, tsis yog SEI zaj duab xis.
Yog li, yuav ua li cas kho cov roj teeb lithium kom raug thaum lub caij ntuj no?
1. Tsis txhob siv cov roj teeb lithium nyob rau hauv qhov kub thiab txias
Qhov kub thiab txias muaj qhov cuam tshuam zoo rau cov roj teeb lithium. Qhov ntsuas kub qis dua, qhov kev ua haujlwm ntawm lithium roj teeb qis, uas ncaj qha ua rau txo qis hauv kev them nqi thiab kev ua haujlwm tawm. Feem ntau hais lus, kev khiav hauj lwm kub ntawm lithium roj teeb nyob nruab nrab ntawm -20 degrees thiab -60 degrees.
Thaum qhov kub thiab txias qis dua 0 ℃, ceev faj tsis txhob them sab nraum zoov, koj tsis tuaj yeem them nws txawm tias koj them nws, peb tuaj yeem nqa lub roj teeb rau hauv tsev (ceeb toom, nco ntsoov nyob deb ntawm cov khoom siv hluav taws xob !!! ), thaum qhov kub thiab txias qis dua -20 ℃, lub roj teeb yuav cia li nkag mus rau lub xeev dormant thiab tsis tuaj yeem siv ib txwm. Yog li ntawd, sab qaum teb yog tshwj xeeb tshaj yog cov neeg siv nyob rau hauv qhov chaw txias.
Yog tias tsis muaj kev them nyiaj hauv tsev tiag tiag, koj yuav tsum siv tag nrho cov hluav taws kub uas seem thaum lub roj teeb tawm, thiab them rau lub hnub tam sim tom qab nres tsheb kom nce lub peev xwm thiab tsis txhob muaj lithium evolution.
2. Tsim tus cwj pwm ntawm kev siv thiab them nyiaj
Thaum lub caij ntuj no, thaum lub roj teeb hluav taws xob tsawg dhau lawm, peb yuav tsum them nws raws sijhawm thiab txhim kho tus cwj pwm zoo ntawm kev them nyiaj sai li sai tau thaum nws siv. Nco ntsoov, tsis txhob kwv yees lub roj teeb lub zog thaum lub caij ntuj no raws li lub roj teeb lub neej ib txwm muaj.
Lithium roj teeb kev ua haujlwm txo qis rau lub caij ntuj no, uas yooj yim heev ua rau overdischarge thiab overcharge, uas yuav cuam tshuam rau lub neej kev pab cuam ntawm lub roj teeb thiab ua rau muaj kev kub ntxhov hauv qhov phem tshaj plaws. Yog li ntawd, nyob rau lub caij ntuj no, peb yuav tsum tau them nyiaj ntau dua rau kev them nyiaj nrog qhov tso tawm ntiav thiab ntiav ntiav. Tshwj xeeb, nws yuav tsum tau taw qhia tias tsis txhob nres lub tsheb ntev ntev hauv txoj kev them nyiaj txhua lub sijhawm kom tsis txhob overcharge.
3. Tsis txhob nyob deb thaum them nyiaj, nco ntsoov tsis txhob them lub sijhawm ntev
Tsis txhob tso lub tsheb mus rau hauv lub xeev them nyiaj rau lub sijhawm ntev rau kev yooj yim, tsuas yog rub tawm thaum nws them tag nrho. Nyob rau lub caij ntuj no, qhov chaw them nyiaj yuav tsum tsis txhob qis dua 0 ℃, thiab thaum them nyiaj, tsis txhob tawm mus deb dhau los tiv thaiv kev kub ntxhov thiab cuam tshuam rau lub sijhawm.
4. Siv lub charger tshwj xeeb rau cov roj teeb lithium thaum them
Lub khw yog dej nyab nrog ntau tus nqi qis dua. Siv cov chargers qis dua tuaj yeem ua rau lub roj teeb puas thiab ua rau hluav taws kub. Tsis txhob npau taws los yuav cov khoom pheej yig yam tsis muaj kev lees paub, thiab tsis txhob siv cov roj teeb txhuas-acid chargers; Yog tias koj lub charger tsis tuaj yeem siv ib txwm, nres siv tam sim ntawd, thiab tsis txhob pom nws.
5. Ua tib zoo mloog lub roj teeb lub neej thiab hloov nws nrog lub sijhawm tshiab
Lithium roj teeb muaj lub neej ntev. Cov kev qhia tshwj xeeb thiab cov qauv sib txawv muaj cov roj teeb sib txawv. Ntxiv nrog rau kev siv tsis raug txhua hnub, lub roj teeb lub neej ntev nws txawv ntawm ob peb lub hlis mus rau peb xyoos. Yog tias lub tsheb raug kaw lossis muaj lub roj teeb luv luv, thov hu rau peb hauv lub sijhawm Lithium roj teeb tu cov neeg ua haujlwm tuav nws.
6. Cia cov hluav taws xob seem kom ciaj sia lub caij ntuj no
Txhawm rau siv lub tsheb ib txwm nyob rau lub caij nplooj ntoo hlav xyoo tom ntej, yog tias lub roj teeb tsis siv ntev, nco ntsoov them 50% -80% ntawm lub roj teeb, thiab tshem tawm ntawm lub tsheb rau kev khaws cia, thiab them nyiaj tsis tu ncua, txog ib hlis ib zaug. Lus Cim: Lub roj teeb yuav tsum muab cia rau hauv qhov chaw qhuav.
7. Muab lub roj teeb kom raug
Tsis txhob muab lub roj teeb tso rau hauv dej lossis ua kom lub roj teeb ntub; tsis txhob muab lub roj teeb ntau tshaj 7 txheej, lossis tig lub roj teeb rov qab.
Post lub sij hawm: Dec-24-2021