Cov roj teeb lithium-ion tau siv dav hauv ntau qhov chaw, xws li tsheb hluav taws xob, khoom siv hluav taws xob, lub zog cia thiab aerospace. Kev ua tau zoo thiab zoo ntawm lithium-ion roj teeb nyob ntawm seb cov khoom siv electrode thiab lawv txoj kev ua. Ib qho ntawm cov txheej txheem tseem ceeb hauv kev tsim hluav taws xob yog calendering, uas yog compression ntawm cov electrode slurry coated ntawm cov ntawv sau tam sim no los ntawm ib khub ntawm cov menyuam. Calendering tuaj yeem txhim kho qhov ceev, conductivity, adhesion, thiab txhua yam lub zog ntawm electrode, nrog rau txo cov thickness thiab porosity. Txawm li cas los xij, calendering kuj muaj qee qhov tsis zoo, xws li tawg, delamination, kev ntxhov siab ntau ntxiv thiab tsis muaj peev xwm. Yog li ntawd, nws yog ib qho tseem ceeb rau optimize lub calendering tsis thiab xaiv cov khoom tsim nyog rau ntau hom electrode thiab specifications.
A roj teeb electrode calendering tshuab(rolling xovxwm tshuab)yog ib qho khoom siv uas muaj ob los yog ntau dua cov menyuam uas tig mus rau qhov sib txawv thiab siv lub zog rau cov khoom uas dhau los ntawm lawv. Muaj ntau hom calendering tshuab, xws li ob-yob, peb-yob, plaub-yob thiab ntau-yob calenders. Ntawm lawv, ob-yob calender yog feem ntau siv ib qho rau lithium-ion roj teeb electrode calendering. Lub calender ob-yob muaj ob lub cylindrical rollers nrog adjustable qhov sib txawv thiab siab. Cov ntawv ci electrode yog pub rau hauv qhov sib txawv thiab compressed los ntawm rollers. Lub thickness thiab ntom ntawm cov electrode tuaj yeem tswj tau los ntawm kev kho qhov sib txawv thiab siab.
Daim ntawv thov ntawm ob-yob calendering tshuab rau lithium-ion roj teeb electrodes nyob ntawm ntau yam, xws li cov khoom siv electrode, txheej txheej, txheej thickness, cov khoom siv rau cov menyuam, cov menyuam txoj kab uas hla, cov menyuam ceev thiab cov menyuam kub. Feem ntau hais lus, ob-yob calendering tshuab yog haum rau electrodes nrog nruab nrab txheej thickness (10-50 microns), siab ceev (1. Cov khoom siv rau cov menyuam yuav tsum yog tawv thiab du, xws li steel lossis chrome-plated steel. Cov menyuam txoj kab uas hla yuav tsum loj txaus kom tsis txhob muaj kev ntxhov siab ntau dhau ntawm cov ntawv ci electrode. Cov menyuam ceev yuav tsum sib phim nrog kev pub noj ceev kom tsis txhob ntog lossis tawg. Cov menyuam kub yuav tsum tau khaws cia rau hauv chav tsev kub lossis siab dua me ntsis kom tsis txhob thermal expansion lossis contraction ntawm electrode.
Lub hauv paus ntsiab lus ua haujlwm ntawm ob-yob calendering tshuab rau lithium-ion roj teeb electrodes yog raws li kev xav ntawm elastic-yas deformation txoj kev xav. Thaum cov ntawv ci electrode nkag mus rau qhov sib txawv ntawm cov chais, nws nkag mus rau elastic deformation ua ntej, uas txhais tau hais tias nws tuaj yeem rov qab tau nws cov duab qub tom qab tshem tawm. Raws li lub siab nce, cov ntawv ci electrode nce mus txog nws qhov taw tes tawm los thiab ua rau cov yas deformation, uas txhais tau hais tias nws khaws qee qhov deformation mus tas li tom qab tshem tawm. Cov yas deformation tuaj yeem txo qhov tuab thiab ua kom qhov ntom ntom ntawm cov electrode. Txawm li cas los xij, yog tias qhov siab dhau lawm, nws yuav ua rau tsis muaj kev puas tsuaj rau cov qauv electrode thiab cov khoom, xws li tawg, delamination lossis lub peev xwm poob.
Cov cuab yeej ua haujlwm ntawm lubroj teeb electrodecalendering tshuabrau lithium-ion roj teeb electrodes yog los txhim kho kev ua tau zoo thiab zoo ntawm electrodes los ntawm optimizing lawv lub cev tsis. Los ntawm kev siv lub tshuab ob-yob calendering, ib tus tuaj yeem ua tiav:
- Siab dua:Calendering tuaj yeem nce cov ntim ntom ntom ntom ntawm cov khoom siv nquag thiab txo qhov chaw tsis muaj chaw nyob nruab nrab ntawm lawv. Qhov no tuaj yeem txhim kho qhov conductivity, muaj peev xwm, thiab lub neej voj voog ntawm electrode.
- Tsawg thickness:Calendering tuaj yeem txo qhov tuab ntawm electrode thiab ua kom nws lub peev xwm tshwj xeeb (muaj peev xwm ntawm ib cheeb tsam). Qhov no tuaj yeem txo qhov hnyav thiab ntim ntawm lub roj teeb thiab txhim kho nws lub zog ceev.
- Zoo adhesion:Calendering tuaj yeem txhim kho qhov adhesion ntawm cov khoom siv hluav taws xob thiab cov ntawv sau tam sim no, nrog rau cov txheej txheem sib txawv ntawm cov electrode (xws li binder, conductive additive, thiab separator). Qhov no tuaj yeem txhim kho lub zog txhua yam thiab kev ruaj ntseg ntawm electrode.
- Uniform porosity:Calendering tuaj yeem tsim kom muaj qhov sib txawv ntawm qhov pore faib hauv cov electrode, uas tuaj yeem pab txhawb cov electrolyte infiltration thiab ion thauj. Qhov no tuaj yeem txhim kho tus nqi kev ua haujlwm thiab kev nyab xeeb ntawm lub roj teeb.
