Photovoltaic: Module tawg, kub qhov chaw, thiab PID teebmeem yog peb yam tseem ceeb uas cuam tshuam rau kev ua haujlwm ntawm crystalline silicon photovoltaic modules. Hnub no, kuv yuav qhia koj txog cov laj thawj ntawm kev tawg ntawm tes, yuav ua li cas txheeb xyuas thiab tiv thaiv lawv.
1. Tsim thiab faib cov kab nrib pleb hauv photovoltaic modules
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
Kev quab yuam sab nraud: Lub roj teeb yuav raug cuam tshuam los ntawm kev quab yuam sab nraud thaum vuam, lamination, framing lossis tuav, kev sim, thiab lwm yam. Thaum cov kev ntsuas tsis raug teeb tsa, cov khoom siv tsis ua haujlwm lossis kev ua haujlwm tsis raug yuav ua rau tawg.
Kub kub: Lub xov tooj ntawm tes tsis yog preheated ntawm qhov kub thiab txias, thiab mam li nco dheev ntsib qhov kub thiab txias nyob rau hauv ib lub sij hawm luv luv thiab nthuav dav, uas yuav ua rau tawg, xws li vuam kub ntau dhau, tsis tsim nyog qhov chaw ntawm lamination kub thiab lwm yam tsis.
Cov khoom siv raw: Cov khoom tsis zoo hauv cov khoom siv raw kuj yog ib qho tseem ceeb ua rau tawg.
Raws li cov duab ntawm lub cell tawg, nws tuaj yeem muab faib ua 5 hom: ntoo tawg, kev tawg yooj yim, oblique tawg, mus rau lub busbar, perpendicular mus rau kab sib chaws thiab cov kab nrib pleb uas nkag mus rau tag nrho ntawm tes.
2. The impact of "cracking" on component performance
Cov tam sim no generated los ntawm crystalline silicon hnub ci hlwb yog tsuas yog sau thiab xa tawm los ntawm busbar kab thiab nyias gridlines uas nws nto yog perpendicular rau ib leeg. Yog li ntawd, thaum cov kab nrib pleb (feem ntau cov kab nrib pleb sib npaug rau cov busbars) ua rau cov kab sib chaws nyias nyias tawg, qhov tam sim no yuav tsis zoo xa mus rau cov busbars, ua rau ib nrab lossis txawm tias tsis ua hauj lwm ntawm tes, thiab tseem tuaj yeem ua rau cov khib nyiab, kub kub, thiab lwm yam. ., tib lub sij hawm ua rau lub hwj chim attenuation ntawm lub Cheebtsam.
Third, the method of identifying "cracks"
EL (Electroluminescence, electroluminescence) yog ib yam khoom siv kho qhov muag pom ntawm lub hnub ci lossis cov khoom, uas yog ib txoj hauv kev yooj yim thiab siv tau los xyuas cov kab nrib pleb. Siv lub hauv paus ntsiab lus ntawm electroluminescence ntawm crystalline silicon, qhov ze ntawm -infrared duab ntawm cov khoom yog ntes los ntawm lub siab - daws teeb meem infrared lub koob yees duab kom tau txais thiab txiav txim qhov tsis xws luag ntawm cov khoom. Nws muaj qhov zoo ntawm qhov siab rhiab heev, kev tshawb nrhiav ceev ceev, thiab cov txiaj ntsig zoo. Daim duab hauv qab no yog qhov ntsuas ntawm EL, uas qhia meej txog ntau yam tsis xws luag thiab tawg.
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.
Tsib, cov ntsiab lus tseem ceeb ntawm kev tiv thaiv cov kab nrib pleb hauv photovoltaic modules
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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