中国物理B ›› 2014, Vol. 23 ›› Issue (2): 28801-028801.doi: 10.1088/1674-1056/23/2/028801

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇    下一篇

Analysis of each branch current of serial solar cells by using an equivalent circuit model

易施光a, 张万辉a b, 艾斌a, 宋经纬a, 沈辉a   

  1. a Institute for Solar Energy Systems, State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics and Engineering, Sun Yat-Sen University, Guangzhou 510275, China;
    b Guangdong Testing Institute of Product Quality Supervision, Foshan 528300, China
  • 收稿日期:2013-01-29 修回日期:2013-05-23 出版日期:2013-12-12 发布日期:2013-12-12
  • 基金资助:
    Project supported by the National High Technology Research and Development Program of China (Grant No. 2012AA050302), the National Natural Science Foundation of China (Grant Nos. 61076059 and 51202301), and the Science & Technology Research Project of Guangdong Province, China (Grant No. 2011A032304001).

Analysis of each branch current of serial solar cells by using an equivalent circuit model

Yi Shi-Guang (易施光)a, Zhang Wan-Hui (张万辉)a b, Ai Bin (艾斌)a, Song Jing-Wei (宋经纬)a, Shen Hui (沈辉)a   

  1. a Institute for Solar Energy Systems, State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics and Engineering, Sun Yat-Sen University, Guangzhou 510275, China;
    b Guangdong Testing Institute of Product Quality Supervision, Foshan 528300, China
  • Received:2013-01-29 Revised:2013-05-23 Online:2013-12-12 Published:2013-12-12
  • Contact: Shen Hui E-mail:shenhui1956@163.com
  • About author:88.40.-j; 88.40.fc; 88.40.jj; 88.40.H-
  • Supported by:
    Project supported by the National High Technology Research and Development Program of China (Grant No. 2012AA050302), the National Natural Science Foundation of China (Grant Nos. 61076059 and 51202301), and the Science & Technology Research Project of Guangdong Province, China (Grant No. 2011A032304001).

摘要: In this paper, based on the equivalent single diode circuit model of the solar cell, an equivalent circuit diagram for two serial solar cells is drawn. Its equations of current and voltage are derived from Kirchhoff’s current and voltage law. First, parameters are obtained from the I–V (current–voltage) curves for typical monocrystalline silicon solar cells (125 mm×125 mm). Then, by regarding photo-generated current, shunt resistance, serial resistance of the first solar cell, and resistance load as the variables. The properties of shunt currents (Ish1 and Ish2), diode currents (ID1 and ID2), and load current (IL) for the whole two serial solar cells are numerically analyzed in these four cases for the first time, and the corresponding physical explanations are made. We find that these parameters have different influences on the internal currents of solar cells. Our results will provide a reference for developing higher efficiency solar cell module and contribute to the better understanding of the reason of efficiency loss of solar cell module.

关键词: solar cell, equivalent circuit, current property

Abstract: In this paper, based on the equivalent single diode circuit model of the solar cell, an equivalent circuit diagram for two serial solar cells is drawn. Its equations of current and voltage are derived from Kirchhoff’s current and voltage law. First, parameters are obtained from the I–V (current–voltage) curves for typical monocrystalline silicon solar cells (125 mm×125 mm). Then, by regarding photo-generated current, shunt resistance, serial resistance of the first solar cell, and resistance load as the variables. The properties of shunt currents (Ish1 and Ish2), diode currents (ID1 and ID2), and load current (IL) for the whole two serial solar cells are numerically analyzed in these four cases for the first time, and the corresponding physical explanations are made. We find that these parameters have different influences on the internal currents of solar cells. Our results will provide a reference for developing higher efficiency solar cell module and contribute to the better understanding of the reason of efficiency loss of solar cell module.

Key words: solar cell, equivalent circuit, current property

中图分类号:  (Solar energy)

  • 88.40.-j
88.40.fc (Modeling and analysis) 88.40.jj (Silicon solar cells) 88.40.H- (Solar cells (photovoltaics))