Fotovoltaik: fant modil, tach cho, ak efè PID yo se twa faktè enpòtan ki afekte pèfòmans nan modil fotovoltaik Silisyòm cristalline. Jodi a, mwen pral montre w rezon ki fè fant selil yo, ki jan yo idantifye ak anpeche yo.
1. Fòmasyon ak klasifikasyon fant nan modil fotovoltaik
Cracks are a relatively common defect in crystalline silicon photovoltaic modules. In layman's terms, they are micro-cracks that are invisible to the naked eye. Due to the characteristics of its own crystal structure, crystalline silicon components are very prone to cracking. In the process flow of crystalline silicon module production, many links may cause cell cracks. The root cause of cracks
Fòs ekstèn: batri a pral afekte pa fòs ekstèn pandan soude, laminasyon, ankadre oswa manyen, tès, elatriye Lè paramèt yo mal fikse, echèk ekipman oswa move operasyon pral lakòz fant.
Tanperati segondè: Selil la pa prechofe nan tanperati ki ba, ak Lè sa a toudenkou rankontre tanperati ki wo nan yon ti tan ak Lè sa a, elaji, ki pral lakòz fant, tankou tanperati soude twòp, anviwònman ki pa rezonab nan tanperati laminasyon ak lòt paramèt.
Matyè premyè: Defo nan matyè premyè yo se tou youn nan faktè prensipal ki mennen nan fann.
Dapre fòm nan fant selil la, li ka apeprè divize an 5 kalite: krak pye bwa, krak konplè, krak oblik, paralèl ak busbar la, pèpandikilè ak kadriyaj la ak fant ki antre nan tout selil la.
2. The impact of "cracking" on component performance
Kouran an ki te pwodwi pa selil solè cristalline Silisyòm se sitou kolekte epi ekspòte pa liy busbar yo ak liy grid mens ki gen sifas pèpandikilè youn ak lòt. Se poutèt sa, lè fant (sitou fant paralèl ak busbars yo) lakòz gridlines mens yo kraze, aktyèl la pa pral efektivman delivre nan busbars yo, sa ki lakòz echèk pasyèl oswa menm nan selil la, epi li ka lakòz tou debri, tach cho, elatriye. ., an menm tan an lakòz atenuasyon pouvwa a nan eleman yo.
Third, the method of identifying "cracks"
EL (Electroluminescence, electroluminescence) se yon kalite ekipman deteksyon defo entèn nan selil solè oswa konpozan, ki se yon metòd senp epi efikas pou detekte fant. Sèvi ak prensip elektwoluminesans nan Silisyòm kristalin, se yon imaj enfrawouj tou pre -konpozan an kaptire pa yon kamera enfrawouj segondè-rezolisyon pou jwenn ak detèmine domaj yo nan eleman an. Li gen avantaj ki genyen nan gwo sansiblite, vitès deteksyon rapid, ak rezilta entwisyon. Foto ki anba a se rezilta tès EL, ki montre klèman divès kalite domaj ak fant.
Fourth, the reasons for the formation of "cracks"
There are many factors that cause module cracks, and there are many types of cracks, but not all cracks will affect the cells, not to mention "hidden" discoloration, as long as scientific prevention can properly prevent the modules from cracking. During the production process, improper external force intervention should be avoided for the cells, and attention should be paid to the temperature range of the storage environment. During the welding process, the battery should be kept warm in advance (hand welding). The temperature of the soldering iron should meet the requirements. In the process of module production, transportation, installation and maintenance, considering the cracking characteristics of crystalline silicon modules, it is necessary to pay attention to and improve the operation process in each process of installing the power station to minimize the occurrence of module cracks.
Senk, pwen prensipal yo nan anpeche fant nan modil fotovoltaik
In the production process and subsequent storage, transportation, and installation, avoid improper external force intervention on the battery cells, and also pay attention to the temperature change range of the storage environment.
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