Cell sheet assembly, cell sheet matrix and solar cell assembly

Abstract

The invention discloses a cell sheet assembly, a cell sheet matrix and a solar cell assembly. The solar sheet assembly comprises cell sheets and conductive belts. The cell sheets and the conductive belts are successively arranged longitudinally. Each cell sheet comprises a silicon sheet, a front conductive piece arranged on a light receiving face of the silicon sheet, two electrodes arranged on abacklight face of the silicon sheet and a side conductive piece which is arranged on the side surface of the silicon sheet and electrically connected between the front conductive piece and one electrode. The two electrodes of each cell sheet longitudinally extend and are separated at an interval transversally. The extension direction of the conductive belts is the same as that of the electrodes, the conductive belts conduct two electrodes which are close to each other and arranged on adjacent two cell sheets so as to allow the adjacent cell sheets to be serially or parallelly connected. According to the invention, use length of the conductive belts can be effectively reduced; use quantity of the conductive belts can be reduced; heat effects caused by the conductive belts are reduced; and the whole power of the cell sheet assembly is improved.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a cell assembly, a cell matrix and a solar cell assembly. Background technique [0002] In the crystalline silicon solar cell in the related art, there are 2-3 silver busbars on the light-receiving side and the backlight side respectively as the positive and negative electrodes of the cell. These silver busbars not only consume a large amount of silver paste, but also block the incident light. As a result, the efficiency of the battery sheet is reduced. In addition, since the positive and negative electrodes are respectively distributed on the light-receiving surface and the backlight surface of the cell, when the cells are connected in series, it is necessary to use a conductive tape to weld the negative electrode on the light-receiving surface of the cell to the positive electrode on the backlight surface of the adjacent cell. As a result, the welding process is cumbersome...

AI Technical Summary

Problems solved by technology

[0002] In the crystalline silicon solar cell in the related art, there are 2-3 silver busbars on the light-receiving side and the backlight side respectively as the positive and negative electrodes of the cell. These silver busbars not only consume a large amount of silver paste, but also block the incident light. resulting in a decrease in the efficiency of the cell

In addition, since the positive and negative electrodes are respectively distributed on the light-receiving surface and the backlight surface of the cell, when the cells are connected in series, it is necessary to use a conductive tape to weld the negative electrode on the light-receiving surface of the cell to the positive electrode on the backlight surface of the adjacent cell. As a result, the welding process is cumbersome and the use of more welding materials is problematic. Moreover, it is easy to cause damage to the battery sheet and the conductive strip during welding and subsequent lamination processes.

[0003] In addition, the cell matrix in the related art is usually composed of 72 or 60 cells connected in series to form three loops consisting of six strings of cells. At this time, at least three diodes are generally required to make each loop A diode is added for bypass protection. Since the diode is usually placed in the junction box of the battery, the cost of the integrated junction box is increased, which increases the structural complexity of the battery. When connecting in series again, the amount of connecting cables is very large, and a lot of materials are wasted, resulting in an increase in the cost of the power station

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