Raws li kev txheeb cais, lub ntiaj teb kev thov rau cov roj teeb lithium-ion tau mus txog 1.3 billion, thiab nrog kev nthuav dav ntxiv ntawm thaj chaw thov, daim duab no tau nce xyoo los ntawm xyoo. Vim tias qhov no, nrog kev nce nrawm hauv kev siv cov roj teeb lithium-ion hauv ntau qhov kev lag luam, kev nyab xeeb ntawm lub roj teeb tau nce zuj zus, yuav tsum tsis yog tsuas yog kev them nyiaj zoo thiab kev ua haujlwm ntawm cov roj teeb lithium-ion, tab sis kuj yuav tsum muaj qib siab dua. ntawm kev nyab xeeb kev ua haujlwm. Cov roj teeb lithium thaum kawg yog vim li cas hluav taws kub thiab tawg, qhov ntsuas twg tuaj yeem zam thiab tshem tawm?
Ua ntej tshaj plaws, cia peb nkag siab cov khoom siv ntawm lithium roj teeb. Kev ua tau zoo ntawm cov roj teeb lithium-ion feem ntau yog nyob ntawm cov qauv thiab kev ua haujlwm ntawm cov khoom siv sab hauv ntawm cov roj teeb uas siv. Cov khoom siv roj teeb sab hauv no suav nrog cov khoom siv tsis zoo electrode, electrolyte, diaphragm thiab cov khoom zoo electrode. Ntawm lawv, kev xaiv thiab qhov zoo ntawm cov ntaub ntawv zoo thiab tsis zoo ncaj qha txiav txim siab txog kev ua haujlwm thiab tus nqi ntawm lithium-ion roj teeb. Yog li ntawd, kev tshawb fawb ntawm pheej yig thiab kev ua haujlwm siab zoo thiab tsis zoo electrode cov ntaub ntawv tau ua kom pom tseeb ntawm kev txhim kho ntawm lithium-ion roj teeb kev lag luam.
Cov khoom siv tsis zoo electrode feem ntau yog xaiv los ua cov khoom siv carbon, thiab kev loj hlob kuj tseem paub tab tam sim no. Txoj kev loj hlob ntawm cov ntaub ntawv cathode tau dhau los ua ib qho tseem ceeb uas txwv qhov kev txhim kho ntxiv ntawm lithium-ion roj teeb kev ua tau zoo thiab txo nqi. Hauv kev lag luam tam sim no ntawm cov roj teeb lithium-ion, tus nqi ntawm cov khoom siv cathode suav txog li 40% ntawm tag nrho cov nqi roj teeb, thiab txo tus nqi ntawm cov khoom siv cathode ncaj qha txiav txim siab txo tus nqi ntawm lithium-ion roj teeb. Qhov no yog qhov tseeb tshwj xeeb rau cov roj teeb lithium-ion fais fab. Piv txwv li, lub roj teeb lithium-ion me me rau lub xov tooj ntawm tes yuav tsum tsuas yog kwv yees li 5 grams ntawm cov khoom siv cathode, thaum lub roj teeb lithium-ion fais fab rau kev tsav tsheb npav yuav xav tau txog li 500 kg ntawm cov khoom cathode.
Txawm hais tias muaj ntau hom khoom siv uas siv tau los ua qhov zoo electrode ntawm Li-ion roj teeb, lub ntsiab tseem ceeb ntawm cov khoom siv electrode zoo yog LiCoO2. Thaum them nyiaj, lub peev xwm hluav taws xob ntxiv rau ob tug ncej ntawm lub roj teeb ua rau cov khoom sib xyaw ntawm qhov zoo electrode tso tawm lithium ions, uas tau muab tso rau hauv cov pa roj carbon ntawm cov electrode tsis zoo nrog cov qauv lamellar. Thaum tso tawm, cov lithium ions precipitate tawm ntawm lub lamellar qauv ntawm cov pa roj carbon thiab recombine nrog cov compound ntawm lub zoo electrode. Lub zog ntawm lithium ions ua rau hluav taws xob tam sim no. Qhov no yog lub hauv paus ntsiab lus ntawm lithium roj teeb ua haujlwm li cas.
Txawm hais tias lub hauv paus ntsiab lus yog qhov yooj yim, hauv kev tsim khoom lag luam tiag tiag, muaj ntau yam teeb meem xav tau: cov khoom siv ntawm cov khoom siv hluav taws xob zoo xav tau cov khoom siv ntxiv los tswj cov kev ua haujlwm ntawm ntau qhov kev them nyiaj thiab tawm, thiab cov khoom siv ntawm cov electrode tsis zoo yuav tsum tau tsim ntawm. qib molecular qauv kom haum rau ntau lithium ions; cov electrolyte muaj nyob nruab nrab ntawm qhov zoo thiab qhov tsis zoo electrodes, ntxiv rau kev tswj kev ruaj ntseg, kuj yuav tsum muaj cov hluav taws xob zoo thiab txo cov roj teeb sab hauv.
Txawm hais tias lub roj teeb lithium-ion muaj tag nrho cov txiaj ntsig tau hais los saum toj no, tab sis nws cov kev xav tau rau kev tiv thaiv Circuit Court yog qhov siab, hauv kev siv cov txheej txheem yuav tsum nruj me ntsis kom tsis txhob overcharge, over-discharge tshwm sim, qhov paug tawm tam sim no yuav tsum tsis txhob muaj. yuav loj dhau, feem ntau, qhov paug tawm yuav tsum tsis txhob siab tshaj 0.2 C. Cov txheej txheem them nyiaj ntawm lithium roj teeb yog qhia hauv daim duab. Nyob rau hauv lub voj voog them, cov roj teeb lithium-ion yuav tsum tau kuaj xyuas qhov voltage thiab kub ntawm lub roj teeb ua ntej them pib txiav txim seb nws puas tuaj yeem them. Yog hais tias lub roj teeb voltage los yog qhov kub thiab txias nyob sab nraum qhov chaw tso cai los ntawm cov chaw tsim khoom, kev them nyiaj yog txwv. Qhov tso cai them hluav taws xob ntau yog: 2.5V ~ 4.2V ib lub roj teeb.
Nyob rau hauv rooj plaub uas lub roj teeb nyob rau hauv qhov tob tob, lub charger yuav tsum tau ua kom muaj cov txheej txheem them ua ntej kom lub roj teeb ua tau raws li cov kev cai rau kev them nyiaj ceev; tom qab ntawd, raws li tus nqi them ceev tau pom zoo los ntawm cov chaw tsim khoom roj teeb, feem ntau 1C, lub charger them lub roj teeb nrog qhov tam sim no thiab lub roj teeb voltage nce qeeb; Thaum lub roj teeb hluav taws xob nce mus txog qhov teeb tsa qhov hluav taws xob (feem ntau 4.1V lossis 4.2V), qhov kev them nqi tas mus li raug txiav tawm thiab them tam sim no Thaum lub roj teeb hluav taws xob nce mus txog qhov teeb tsa hluav taws xob (feem ntau 4.1V lossis 4.2V), qhov them tam sim no tsis tu ncua terminates, lub them tam sim no decays sai heev thiab lub charging nkag mus rau tag nrho cov txheej txheem them; Thaum lub sij hawm tag nrho cov txheej txheem them, cov nqi them tam sim no maj mam mus txog rau thaum tus nqi them poob qis qis dua C / 10 lossis lub sijhawm them tag nrho yog overrun, ces nws tig mus rau sab saum toj txiav tawm them; Thaum lub sij hawm them nyiaj txiav tawm sab saum toj, lub charger rov ntxiv lub roj teeb nrog lub them tam sim no me me. Tom qab ib lub sij hawm ntawm kev txiav tawm saum toj kawg nkaus, tus nqi raug muab tua.
Post lub sij hawm: Nov-15-2022