Kev lag luam photovoltaic thoob ntiaj teb tau pib lub voj voog tshiab ntawm kev vam meej. Kev ua kom sov sai ntawm kev lag luam photovoltaic hauv Suav teb, Nyiv thiab Tebchaws Meskas txhawb nqa lub voj voog kev lag luam no. Kev kawm tas mus li ntawm photovoltaic thev naus laus zis txhawb kev nce ntxiv hauv qib ntawm segmentation ntawm kev lag luam photovoltaic. Ntxiv nrog rau daim ntawv thov hom kev tsim hluav taws xob photovoltaic, kev sib xyaw ua ke ntawm photovoltaic thev naus laus zis thiab cov khoom siv pej xeem tau pib qhia qhov tseem ceeb. Kab lus no sib piv thiab txheeb xyuas cov yam ntxwv ntawm ob cov khoom siv raw, EVA thiab PVB, rau cov khoom siv hluav taws xob photovoltaic, thiab tshuaj xyuas lawv cov txheej txheem cov yam ntxwv.
EVA nplaum zaj duab xis qhia tau hais tias nws qhov zoo nyob rau hauv lub tshav pob hnub ci encapsulation
Lub encapsulation bonding khoom siv nyob rau hauv crystalline silicon solar cell kev lag luam yog ib tug nplaum. Ua ntej xyoo 1980s, kua silicone resin thiab polyvinyl butyral resin sheet (PVB) tau sim hauv tsev thiab txawv teb chaws, tab sis lawv tau raug tshem tawm vim yog tus nqi siab, kev tsim kho hnyav thiab lub cev tsis zoo. Txij li xyoo 1980s, EVA zaj duab xis tau tsim tawm txawv teb chaws. Nws yog ib tug kub-melt nplaum zaj duab xis. Nws tsis yog nplaum thiab tiv thaiv kev thaiv ntawm chav tsev kub. Nws tau txais txiaj ntsig zoo heev hauv kev ntim khoom hnub ci thiab siv sab nraum zoov.
EVA (Ethylene Vinyl Acetate: ethylene-vinyl acetate copolymer).
EVA yog ib hom kub yaj nplaum, uas yog, nyob rau hauv chav tsev kub, EVA yog khoom, tsis muaj viscosity, tsis zoo lub teeb transmittance Thaum lub EVA yog rhuab mus rau ib tug tej yam kub, EVA yuav yaj thiab khi rau cov khoom nyob rau hauv kev sib cuag nrog nws. EVA siv rau hnub ci cell encapsulation yog ib qho tshwj xeeb tsim thermosetting kub yaj nplaum, uas yog, qhov sib txuas sib txuas tshwm sim thaum cua sov thiab yaj. Thaum qhov kub thiab txias tsis tshua muaj, qhov ceev ntawm qhov sib txuas ntawm cov tshuaj tiv thaiv yog qeeb heev, thiab lub sij hawm yuav tsum tau ua kom tiav cov curing yog ntev, txwv tsis pub lub sij hawm yuav tsum tau luv luv. Yog li ntawd, nws yog ib qho tsim nyog los xaiv qhov tsim nyog lamination kub kom EVA tuaj yeem tau txais cov dej ntws hauv cov yaj, thiab tib lub sijhawm muaj cov tshuaj tiv thaiv kho. Raws li cov tshuaj tiv thaiv zoo zuj zus tuaj, qib ntawm kev sib txuas sib txuas ntxiv, thiab EVA poob nws cov dej ntws thiab ua raws li kev ntim khoom.
Kev ua haujlwm ntawm qhov kub sib txawv yog: melting kub (70-80 degree ). Lub sijhawm no, EVA yog rhuab thiab yaj, thiab lub fluidity yog qhov zoo, uas yog lub sijhawm zoo tshaj plaws rau lub tshuab nqus tsev. Ntawm qhov kub thiab txias, tus neeg sawv cev sib txuas uas muaj nyob hauv EVA tsim cov dawb radicals, thiab kev sib txuas sib txuas tshwm sim ntawm EVA molecules, uas ua rau muaj peb-dimensional network qauv, tsis zoo fluidity, thiab siab viscosity. Qhov kub no yog tsim rau laminating Cheebtsam kom lawv cov qauv nruj dua thiab siab dua daim ntawv cog lus rau iav thiab rov qab. Thaum qhov kub siab tshaj qhov ntsuas kub, tus neeg sawv cev sib txuas sib txuas decomposes roj, uas yooj yim ua npuas hauv cov khoom, thiab tib lub sijhawm, qhov sib txuas ntawm EVA txo qis, thiab nws yooj yim rau vulcanize thiab tig daj, ua rau shrinkage.
PVB (Poly vinyl butyral: polyethylene butyral).
Xyoo 1935, Asmeskas cov kws tshawb fawb tau tsim cov khoom siv polymer uas tuaj yeem sib xyaw ntawm ob txheej iav zoo tib yam - polyvinyl butyral, lub npe Askiv yog POLYVINLBUTARAL, luv luv li PVB. Nws yog ib tug polymer tsim los ntawm condensation cov tshuaj tiv thaiv ntawm siab molecular polyvinyl cawv thiab butyraldehyde, thiab muaj ze li ntawm 23 feem pua ntawm qhov hnyav ntawm vinyl cawv pawg hauv cov polymer kawg. Qhov no polyvinyl butyral yog plasticized nrog ib tug tshwj xeeb plasticizer (feem ntau triethylene glycol esters), thiab ib tug nruam 0.38 yog tsim los ntawm ib tug extruder system thiab meej thickness tswj. ~1. 52mm tuab zaj duab xis.
Qhov txawv ntawm PVB zaj duab xis thiab EVA zaj duab xis
1. Daim ntawv thov teb
EVA feem ntau yog siv rau encapsulation ntawm crystalline silicon hlwb, thiab ib tug me me ntawm cov yeeb yaj duab nyias kuj tau siv, feem ntau ua si lub luag hauj lwm ntawm kev tiv thaiv lub roj teeb thiab zoo haum lub cell mus rau lub hau npog. Tam sim no, cov khoom siv hauv kev ua lag luam yog cov paub zoo tshaj plaws hauv Dupont's Telaar, tab sis kuj tseem muaj ntau lwm cov tuam txhab lag luam thoob ntiaj teb hauv kev tsim cov khoom lag luam ntau yam, xws li 3M, thiab lwm yam, thiab muaj ntau lub tuam txhab hauv tsev uas tuaj yeem siv tau. rau hnub ci zog, xws li Foster, Swick, Hayworth, thiab lwm yam.; Jinwei EVA kub hnub ci encapsulating zaj duab xis ntau lawm kab yog nyob rau hauv ib tug monopoly txoj hauj lwm nyob rau hauv photovoltaic zaj duab xis kev lag luam.
PVB yog tam sim no tsuas yog siv nyob rau hauv nyias zaj duab xis roj teeb, ob chav iav modules, lub tsev integration (BIPV) thiab lwm yam teb, ntau lawm qhauj thiab cov khoom qauv muaj tsawg, tam sim no Dupont, Kuraray thiab hais txog, kuj muaj ib tug neeg lag luam nyob rau hauv Tuam Tshoj uas tab tom sim rau tsim, xws li Xinfu Pharmaceutical.
2. txheej txheem lamination
Qhov ntsuas kub ntawm PVB thiab EVA yog qhov sib txawv. EVA muaj cov thermoplasticity zoo thiab tsis muaj cov khoom siv siab dua li PVB. PVB muaj qhov yuav tsum tau kub siab dua (kwv yees li 155 degree) thiab cov kev xav tau siab dua rau cov laminators.
3. Lwm tus
PVB yog cov khoom siv hauv tsev, uas muaj cov khoom siv roj hmab zoo heev, thiab kev ua haujlwm adhesion zoo heev, thiab huab cua tiv taus zoo dua. Qhov tsis zoo yog tias qhov thaiv kev ua haujlwm rau dej vapor yog qhov tsis zoo, uas yog qhov tsim nyog rau lub hnub ci hlwb. Thiab mos heev tsis yooj yim rau kev khiav lag luam. Tus nqi kuj tseem ntau dua 3 npaug ntawm EVA.
