Dab tsi yog lithium{0}}ion roj teeb electrode slitting?
Electrode Slitting Methods
Slitting yog hu ua shearing nyob rau hauv mechanical processing, thiab raws li daim ntawv ntawm cov cuab yeej txiav, nws yuav muab faib ua shearing txoj kev xws li oblique- hniav shearing, tiaj- hniav shearing, teb shearing (los yog yob txiav), thiab disc shearing.
Hauv oblique- hniav shearing, muaj lub kaum sab xis ntawm sab sauv thiab sab qis, thiab lub kaum sab xis feem ntau yog 1℃~ 6℃. Feem ntau, cov hniav sab saud yog inclined, raws li qhia hauv daim duab 7-2(a). Txij li cov hniav sab sauv thiab sab qis tsis sib luag, muaj lub zog raws li cov kev taw qhia txiav, uas yooj yim ua rau distortion ntawm ntug txiav. Txawm li cas los xij, thaj chaw shearing yog me me, thiab lub zog shearing thiab lub zog siv tsawg dua li ntawm lub tiaj- hniav shearing, yog li nws yog siv rau shearing tuab daim hlau nyob rau hauv loj thiab nruab nrab-qhov loj me shearing tshuab, thiab feem ntau tsis siv rau electrode slitting.
Pav ca- blade shearing muaj cov qauv zoo ib yam li oblique- hniav shearing, tshwj tsis yog tias cov npoo sab sauv thiab sab qis yog sib npaug, raws li pom hauv daim duab 7-2(b). Nws ua tiav kev txiav yam tsis muaj kev cuam tshuam thiab muaj kev txiav zoo, tab sis lub zog shearing yog qhov loj, thiab feem ntau yog siv rau hauv cov tshuab txiav me me thiab rau blanking nyias daim hlau thiab cov yeeb yaj kiab [1-2], nrog rau electrode cross-cutting.
Rotary shearing tseem hu ua arc-ntug yob txiav, uas siv cov cuab yeej nrog arc-zoo li tus ntug. Cov cuab yeej ua tiav cov txheej txheem shearing los ntawm kev tig thiab dov ib ncig ntawm ob lub axes ruaj khov, raws li pom hauv daim duab 7-2(c). Nws yog tsuas yog siv los paub txog qhov ruaj khov-ntev hla- txiav, taub hau thiab tus Tsov tus tw hlais, thiab ntug slitting. Feem ntau, thaum shearing nruab nrab thiab tuab daim hlau, nws nta zoo, tsis muaj zog noj, lub neej ntev, thiab siab tso zis [3].
Disc shearing yog ua tiav los ntawm kev sib hloov tas mus li ntawm ob lub disc -zoo li tus cutter log, ib qho saum toj thiab ib qho hauv qab, raws li pom hauv daim duab 7-3. Thaum lub sij hawm shearing, lub uncoiled electrode daim ntawv nkag mus rau hauv lub disc cutter qhib thiab muab faib ua ntau strips tom qab txiav[1]. Disc shearing yog dav siv rau longitudinal slitting ntawm nyias daim hlau, nyias zaj duab xis, thiab hlau foils.
Hauv kev tsim cov roj teeb lithium-ion roj teeb, qhov kev txiav ntev ntev (slitting) ntawm cov ntawv electrode feem ntau siv disc shearing, thaum hla- txiav siv tiaj- hniav shearing. Automated ntau lawm kab feem ntau ua slitting ua ntej, thiab ces hla - txiav. Feem ntau, cov kev cai hauv qab no tau muab tso rau ntawm qhov sib tsoo ntawm lithium-ion roj teeb electrode nplooj ntawv:
① Siab qhov tseeb ntawm daim ntawv electrode;
② Cov nplooj ntawv electrode yog tiaj thiab tsis muaj burrs, muaj ob peb yam tsis xws luag, thiab cov txheej electrode txheej tsis puas;
③ High yield thiab ntau lawm efficiency.
Electrode Sheet Shearing txheej txheem
Rau cov ntaub ntawv yas, cov txheej txheem shearing tuaj yeem muab faib ua peb theem [5-6]:
① Cov hniav pib nias rau hauv lub phaj, thiab cov khoom siv phaj nruab nrab ntawm qhov kev txiav tau ua rau cov yas deformation thiab ntws mus txog thaum cov yas deformation mus txog qhov txwv ntawm cov yas yas. Qhov no yog hu ua thawj theem. Thaum lub sij hawm no, cov ntaub ntawv phaj yog sheared, tsim ib tug du shear nto, saib daim duab 7-4(a).
② Cov hniav txuas ntxiv mus rau hauv lub phaj, thiab tawg nucleate, propagate, thiab nkag mus rau hauv cov khoom siv phaj nruab nrab ntawm kev txiav. Cov khoom siv phaj nruab nrab ntawm qhov kev txiav yog rub tawm los ntawm qhov kev txiav txim ntawm tensile kev nyuaj siab kom txog rau thaum lub sab sauv thiab sab hniav nyob rau tib lub dav hlau kab rov tav. Qhov no yog hu ua theem ob. Nyob rau theem no, cov ntaub ntawv phaj yog torn, tsim ib tug dull fracture nto, saib daim duab 7-4(b) thiab (c);
③ Cov hniav txuas ntxiv nias. Vim yog cov yas ntws, cov khoom siv phaj nruab nrab ntawm kev txiav yog extruded rau hauv qhov sib txawv me me uas cov hniav sib tshooj. Raws li kev sib tshooj ntawm cov hniav ntuag nce, cov khoom siv phaj hauv qhov sib txawv yog torn thiab rub tawm, tsim burrs ntawm ntug, saib daim duab 7-4(d), kom txog thaum cov cuab yeej sib cais. Qhov no yog hu ua burr formation theem. Thaum lub sij hawm kev sib cais ntawm cov cuab yeej, cov cuab yeej yuav muaj ib tug smoothing los yog extruding nyhuv ntawm cov khoom phaj, ua rau lub morphology ntawm dull fracture nto thiab burrs hloov, tab sis qhov kev hloov me me.
Cov hlais hlais- ntu tom qab txiav yog pom hauv daim duab 7-5, uas muaj peb ntu: lub npoo npoo du, dull tawg nto, thiab ntug burr[5-6]. Lub dull tawg nto kuj hu ua brittle fracture nto. Nws qhov dav yog cuam tshuam nrog cov khoom siv plasticity. Rau cov ntaub ntawv nrog cov yas zoo dua, qhov dull tawg nto yog me dua, lub npoo du yog loj dua, thiab cov hlau ntws tau tsim ntau dua, ua rau nws yooj yim rau burrs. Conversely, rau cov ntaub ntawv nkig, tsis muaj tus shear nto.
