基于封装胶膜优化的TOPCon电池极化型PID抑制机制研究  

Research on Polarization PID Suppression Mechanism of TOPCon Battery Based on Encapsulation Film Optimization

作　　者：刘苗苗 李陶 魏晓勇 张彪 阮建成[2] LIU Miaomiao;LI Tao;WEI Xiaoyong;ZHANG Biao;RUAN Jiancheng(Zhejiang Sinopont Technology Co.,Ltd.,311254;College of Chemical and Biological Engineering at Zhejiang University,310027,Hangzhou)

机构地区：[1]浙江祥邦科技股份有限公司,311254 [2]浙江大学化学工程与生物工程学院,杭州310027

出　　处：《化工生产与技术》2025年第2期1-6,I0002,共7页Chemical Production and Technology

摘　　要：针对N型TOPCon电池在负偏压下易发生极化型电势诱导衰减(PID-p)的问题,从封装胶膜配方优化的角度出发,提出了3种改善策略:使用高体积电阻率/低水汽透过率的树脂、添加钠离子捕获剂、减少液体助剂总量。PID 96 h测试和电性能分析结果表明,聚烯烃弹性体(POE)胶膜能够完全抑制PID-p现象,电致发光(EL)图像衰减显著改善,电性能显著优于乙烯-醋酸乙烯共聚物(EVA)胶膜与EVE-POE-EVE胶膜(EPE胶膜);添加钠离子捕获剂可减少游离Na^(+)迁移量,但会导致透光率略有下降(约1%);减少液体助剂总量仅微弱改善PID-p现象。研究表明,减少胶膜中阳离子总量和减缓阳离子迁移速率是抑制PID-p的关键策略。本研究为TOPCon组件抗PID-p封装提供了技术支撑。In response to the problem of polarization induced potential decay(PID-p)in N-type TOPCon batteries under negative bias,three improvement strategies were proposed from the perspective of optimizing the encapsulation film formula:using high volume resistance/low water permeability resin,adding sodium ion scavenger,and reducing the total amount of liquid assistant.The results of PID 96 h testing and electrical performance analysis show that polyolefin elastomer(POE)film can completely suppress the PID-p phenomenon,significantly alleviate the attenuation of electroluminescence(EL)images,and have significantly better electrical performance than ethylene vinyl acetate copolymer(EVA)film and EVE-PEE-EVE film(EPE film);Adding sodium ion scavengers can reduce the migration of free Na^(+),but it can cause a slight decrease in transmittance(about 1%);Reducing the total amount of liquid additives only slightly improves the PID-p phenomenon.Research has shown that reducing the total amount of cations in the adhesive film and slowing down the migration rate of cations are key strategies for inhibiting PID-p.This study provides technical support for the anti PID-p packaging of TOPCon components.

关 键 词：封装胶膜 隧穿氧化层钝化接触 电势诱导衰减 极化 光伏 聚烯烃弹性体 

分 类 号：TB383.2[一般工业技术—材料科学与工程] TM914.4[电气工程—电力电子与电力传动]