A kind of solar cell module and its manufacturing method

Abstract

The invention provides a solar cell module. The solar cell module comprises: an installation frame which is provided with an installation groove for installing a cell panel therein, wherein the bottom wall of the installation groove is provided with a penetrating bar-shaped lead wire lead-out hole; and a junction box arranged at the outer surface of the bottom wall of the installation groove, wherein a lead wire passing through the lead wire lead-out hole electrically conducts the cell panel and the junction box. The solar cell module provided by the invention has the following advantages: on one hand, the junction box is installed on the installation frame rather than the back surface of the cell panel, such that the influence caused by heat dissipation of the junction box to the output power of a cell is avoided, the application of a cell module manufacturer is facilitated, the labor cost is decreased, and the installation efficiency is improved; and on the other hand, compared to a conventional solar cell module whose junction box is installed on a back plate, the photoelectric conversion efficiency of the cell module provided by the invention in actual application is improved. The invention further provides a manufacture method of the solar cell module.

Description

technical field [0001] The present invention relates to the field of solar photovoltaic technology, and more specifically, relates to a solar cell assembly. The present invention also provides a manufacturing method of the solar cell assembly. Background technique [0002] As an important part of the solar cell assembly, the junction box is a connector between the solar cell array formed by the solar cell assembly and the solar cell charging control device, that is, the junction box is used to realize the The device for the electrical connection between the inverter and the controller. [0003] Currently commonly used photovoltaic junction boxes include a box cover and a base, and a conductive sheet installation cavity is provided between the box cover and the base, and a conductive sheet with a diode is arranged therein. In practical application, on the one hand, the place where the junction box is installed has a large thermal resistance and poor heat dissipation; on the ...

AI Technical Summary

Problems solved by technology

In practical applications, on the one hand, the thermal resistance of the junction box is large and the heat dissipation is poor; on the other hand, the diode will generate heat and cause the temperature to rise during operation. As the temperature of the diode continues to rise, the resistance of the diode will continue to increase. Larger, resulting in more heat generated by the diode, this vicious cycle makes the junction box in a high temperature state, the cells in the battery module are connected in series, and the output characteristics of the solar cell module composed of series cells are restricted by the worst performance cells , that is, the output power of the entire battery assembly depends on the output power of the worst-performing cell, and the electric energy output power of the cell exhibits a negative temperature characteristic, that is, the higher the temperature, the smaller the output power of the cell

[0004] In the traditional technology, the junction box is set on the back of the battery module. In application, due to the poor heat dissipation performance of the junction box, from the picture of the battery module in normal operation taken by the infrared imager, each photovoltaic module has There is a small "heat island" (the heat island mentioned in this application, that is, the part where the battery module overheats the cells during normal operation), this "heat island" is exactly where the junction box is located, so that the solar cells adjacent to the junction box The power is significantly lower than that of other solar cells in the same module, and in severe cases, it may even cause the shift of the working point of the solar cell module in this square array

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