10001981_Discussion of the backsheet function for PV module and how to design a innovated backsheet in DSM-solarbe文库

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Discussion of the backsheet function for PV module and How to design a innovated backsheet in DSM Jack Li 15th May 2018 Confidential Outlines Backsheet evolution What we talk about when we talk about backsheet New backsheet designed by DSM The technical trend of PV backsheet About Cells Page 1 Confidential 光伏组件封装材料的发展组件结构第一代封装方式， 1970-1975 铝制模具电池绝缘层浇注液体硅胶环氧基或玻璃纤维增强树脂的基板第二代封装方式， 1976-1980 1. 脱层； 2. 水渗透； 3. 尘土覆盖在硅胶弹性体上； 4. 衬板老化； 5. 裂片； 6. 短路； 7. 脱焊； 8. 过热。硬质硅塑料弹性衬垫玻璃玻璃液体硅胶 or PVB 封装液体硅胶封装多种结构及材料在 10年间被不断的尝试，清晰的材料性能要求及成本要求逐渐形成。 Confidential - 美国政府立项； - Jet Propulsion Laboratory （喷气推进实验室 JPL）主持； - 旨在建立晶硅组件户外使用 30年的寿命， 10的组件效率及达到 0.5 USD/W 的价格（ in 1975 dollar）。 The Flat-Plate Solar Array FSA Project（ 1975-1985）光伏组件封装材料的发展背板选材 Confidential Confidential Outlines Backsheet evolution What we talk about when we talk about backsheet New backsheet designed by DSM Future technical trend About Cells Page 6 Confidential To Increase Power, Module Components must Endure More UV Light 2001 Removal of Cerium doping from glass Increasing levels of UV dosage available to a solar module over the past 14years 2010 “UV Through” Encapsulants Resulting in 60 more damaging UV dosage to the underlying module components, such as backsheet. Modules at greater risk for UV damage 0 20 40 60 80 100 200 250 300 350 400 450 500 T Wavelength nm Source 1STR, AFG Confidential Confidential Page 10 Confidential 背板抗紫外耐水解高阻隔不黄变高反光高低温粘结力好抗酸碱耐摩擦背板核心性能和技术指标之间的区别 Confidential 背板核心性能和技术指标之间的区别抗紫外耐黄变不脱层不鼓泡耐水解抗酸碱耐磨擦阻隔绝缘反光组件对于背板所提出的要求只有三个。而我们经常讨论的黄变，耐紫外，粘接性等是为了满足背板核心性能而对其提出的技术指标。技术指标满足核心性能的方式多种多样，可以为设计不同性能和成本低廉的背板提供空间。实际上， PET虽然刚性好，但是耐水解性能一直是劣势。而所有含氟背板在 PET的耐水解性能上并没有多少帮助 Confidential 背板核心性能和技术指标之间的区别抗紫外耐黄变不脱层不鼓泡耐水解抗酸碱耐磨擦阻隔绝缘反光抗冲击钢化度耐盐碱尺寸规格透光率耐磨擦阻隔绝缘反光玻璃背板复合背板围绕背板的核心性能，基于不同背板材料的特性去设计实验评估相应的技术指标是评价一款背板的有效方式 Confidential Outlines Backsheet evolution What we talk about when we talk about backsheet New backsheet designed by DSM Future technical trend About Cells Page 14 Confidential15 WVTR B05 B10 TPT TPP KPE KPf PYE CPC Initial 0.8 0.6 1.7 1.9 1.4 1.8 1.3 2.0 0.0 0.5 1.0 1.5 2.0 2.5 WVTR g/m2,24h 1. DSM backsheet showed lowest WVTR. Confidential Page 16 0 20 40 60 80 100 B05 B10 TPT KPE KPf TPP PYE CPC Elongation retention after PCT48 MD TD 0 20 40 60 80 100 B05 B10 TPT KPE KPf TPP PYE CPC Elongation retention after PCT96 MD TD Durability, PCT 1. DSM backsheet showed the best performance after PCT aging. 2. After PCT96, only DSM backsheet showed mechanical properties. Confidential Page 17 CPVT 背板综合老化评估中， DSM 背板名列前茅。唯一通过杜邦序列测试的非杜邦型号背板。 DHUV测试，可以承受 120kwh的辐照剂量，而同时 PET结构背板很难通过 60kwh DSM背板反射率在所有背板中，以成本最低的方式达到最高的反射率层间剥离强度在加速老化中的表现优异背板在组件层面的阻燃性能。 Confidential背板反射率 ② DSM测试结果东洋铝测试 Confidential 背板和封装材料的结合思路镀膜玻璃二次镀膜防灰玻璃 EVA 低结晶度高折射率三层共挤型封装一体化背板外层抗摩擦和紫外中间层骨架材料耐水解内层低模量高反光不交联或者辐照低交联电池目标＜ 1.3 usd/m2 不开裂，不分层，高阻隔，可拓展防火性能，可高透光也可高反光解决内层材料和正面封装材料以及电池的粘接性能 DISCLAIMER Although DSM has used diligent care to ensure that the information provided herein is accurate and up to date, DSM makes no representation or warranty of the accuracy, reliability, or completeness of the information. This publication is distributed without warranty of any kind, either expressly or implied. In no event shall DSM be liable for any damages arising from the reader’s reliance upon, or use of, these materials. The reader shall be solely responsible for any interpretation or use of the material contained herein.