Fotovoltaik: modul yoriqlari, issiq nuqtalar va PID effektlari kristalli silikon fotovoltaik modullarning ishlashiga ta'sir qiluvchi uchta muhim omildir. Bugun men sizga hujayra yorilishining sabablarini, ularni qanday aniqlash va oldini olishni ko'rsataman.
1. Fotovoltaik modullarda yoriqlarning shakllanishi va tasnifi
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
Tashqi kuch: Batareyaga payvandlash, laminatsiyalash, ramkalash yoki ishlov berish, sinov va hokazolar paytida tashqi kuch ta'sir qiladi. Parametrlar noto'g'ri o'rnatilganda, uskunaning ishlamay qolishi yoki noto'g'ri ishlashi yorilishlarga olib keladi.
Yuqori harorat: Hujayra past haroratda oldindan qizdirilmaydi va keyin to'satdan qisqa vaqt ichida yuqori haroratga duch keladi va keyin kengayadi, bu esa ortiqcha payvandlash harorati, laminatsiya haroratining asossiz o'rnatilishi va boshqa parametrlar kabi yoriqlar paydo bo'lishiga olib keladi.
Xom ashyo: Xom ashyoning nuqsonlari ham yorilishga olib keladigan asosiy omillardan biridir.
Hujayra yorilishi shakliga ko'ra, uni taxminan 5 turga bo'lish mumkin: daraxt yorilishi, keng qamrovli yoriq, qiya yoriq, shinaga parallel, to'rga perpendikulyar va butun hujayraga kirib boradigan yoriqlar.
2. The impact of "cracking" on component performance
Kristalli kremniy quyosh xujayralari tomonidan ishlab chiqarilgan oqim, asosan, sirtlari bir-biriga perpendikulyar bo'lgan shina liniyalari va nozik panjara chiziqlari tomonidan to'planadi va eksport qilinadi. Shuning uchun, yoriqlar (asosan, shinalarga parallel ravishda yoriqlar) ingichka panjara liniyalarining uzilishiga olib kelganda, oqim shinalarga samarali etkazib berilmaydi, natijada hujayraning qisman yoki hatto ishdan chiqishiga olib kelishi mumkin, shuningdek, qoldiqlar, issiq joylar va h.k. ., bir vaqtning o'zida komponentlarning quvvatini susaytirishiga olib keladi.
Third, the method of identifying "cracks"
EL (Electroluminescence, electroluminescence) - quyosh batareyalari yoki komponentlarining ichki nuqsonlarini aniqlash uskunasining bir turi bo'lib, yoriqlarni aniqlashning oddiy va samarali usuli hisoblanadi. Kristalli kremniyning elektrolyuminesans printsipidan foydalanib, komponentning nuqsonlarini olish va aniqlash uchun{0}}komponentning yaqin infraqizil tasviri yuqori-ravshanlikdagi infraqizil kamera tomonidan olinadi. U yuqori sezuvchanlik, tez aniqlash tezligi va intuitiv natijalarning afzalliklariga ega. Quyidagi rasmda turli nuqsonlar va yoriqlar aniq ko'rsatilgan EL test natijasidir.
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.
Beshta, fotovoltaik modullarda yoriqlar oldini olishning asosiy nuqtalari
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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