A wedge-shaped electrode for connecting crystalline silicon solar cells
A technology for solar cells and solar cells, applied in welding media, welding equipment, welding/cutting media/materials, etc., which can solve the problem that the equivalent impedance of the electrode is not optimized to the minimum value, and the different current densities in the welding section are not considered, etc. problem, to achieve the effect of simple structure, reducing electrode wire resistance and reducing shading area
Active Publication Date: 2016-09-21
吉木萨尔县嘉瑞宇邦半导体材料有限公司
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Problems solved by technology
Generally speaking, we use metal electrodes to connect crystalline silicon solar cells in series and package them into modules to increase their output voltage and make them meet the corresponding application requirements. The traditional electrode shape is a long strip of equal width. This electrode The disadvantage of the shape is that the current density of the welding section of the electrode is not considered to be different, resulting in that the equivalent impedance of the electrode is not optimized to the minimum value
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[0007] As shown in the figure, the specific embodiment of the present invention is as follows: a wedge electrode for connecting crystalline silicon solar cells, which includes an electrode wedge section 1 and an electrode section 2, and the electrode wedge section 1 and the electrode section 2 are connected together , The joint between electrode wedge section 1 and electrode section 2 is arc-shaped. The electrode wedge segment 1 is in contact with the front of the crystalline silicon solar cell sheet 31 and welded together, the electrode segment 2 is in contact with the back side of the crystalline silicon solar cell sheet 32 and welded together, the electrode wedge segment 1 is wedge-shaped, and the electrode segment 2 is wedge-shaped or rectangular shape.
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The invention discloses a wedge-shaped welding rod for connecting crystalline silicon solar cells. The wedge-shaped welding rod comprises a welding rod wedge-shaped section and a welding rod section. The welding rod wedge-shaped section is connected with the welding rod section, is in contact with the front surface of a crystalline silicon solar cell and is welded with the front surface of the crystalline silicon solar cell, the welding rod section is in contact with the back surface of another crystalline silicon solar cell and is welded with the back surface of the other crystalline silicon solar cell, the welding rod wedge-shaped section is wedge-shaped, and the welding rod section is wedge-shaped or rectangular. The wedge-shaped welding rod has the advantages that the wedge-shaped welding rod is simple in structure, wire resistance of the welding rod is reduced, the shading area of the front surface of each cell is reduced, output power of each cell is greatly increased, power loss which is caused in an area from each cell to an assembly due to the wire resistance of the welding rod is reduced, and accordingly the quality of products is improved.
Description
technical field [0001] The invention belongs to the field of new energy, and in particular relates to a wedge-shaped welding rod for connecting crystalline silicon solar cells. Background technique [0002] Since the output voltage of monolithic crystalline silicon solar cells is less than 1 volt, and the output current often reaches several amperes, the independent application range of monolithic solar cells is very limited. Generally speaking, we use metal electrodes to connect crystalline silicon solar cells in series and package them into modules to increase their output voltage and make them meet the corresponding application requirements. The traditional electrode shape is a long strip of equal width. This electrode The disadvantage of the shape is that the current density of the welding section of the electrode is not considered to be different, resulting in that the equivalent impedance of the electrode is not optimized to the minimum value. Contents of the inventi...
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IPC IPC(8): B23K35/02
Inventor 朱旭东刘峰何金华
Owner 吉木萨尔县嘉瑞宇邦半导体材料有限公司