Small sealant filling photovoltaic junction box

Abstract

The invention discloses a small sealant filling photovoltaic junction box. The small sealant filling photovoltaic junction box comprises a base and an upper cover which are buckled with each other; a bottom plate is mounted in the base; terminals are mounted on the bottom plate; diodes are mounted on the terminals; photovoltaic cables pass through wire fasteners in the base and are connected with the terminals; the upper part of the bottom plate in the base is filled with sealant. The hottest part of the photovoltaic junction box is not in direct contact with a solar rear panel, a convection cavity is formed in the bottom of the base, a height difference exits between the bottom surface of the base and the bottom plate, and vent holes are formed in the upper cover, so that a good radiating effect is achieved; the inner cavity of a box body is filled with metal parts, the radiating area of the photovoltaic junction box filled with the sealant is large, and the heat distribution is uniform; the periphery of the base is bent to form coamings, and cavities are defined by the coamings, so that the radiating speed is increased while the sealant filling amount is reduced.

Description

technical field [0001] The invention relates to the field of photovoltaic power generation, in particular to a small glue-filled photovoltaic junction box used in a photovoltaic power generation system. Background technique [0002] In the electrical connection technology of photovoltaic power generation systems, photovoltaic junction boxes are usually used to realize the electrical connection between photovoltaic modules and inverters. Since the application of the photovoltaic junction box is usually an outdoor environment, it is an important consideration in the design of the photovoltaic junction box to prevent the infiltration of rainwater and other media from affecting the internal electrical connection. The glue-filled photovoltaic junction box is sealed and waterproof by filling glue, which is a better solution at present. The current glue-filled photovoltaic junction box is the same as the ordinary junction box, and an installation cavity is provided between the box...

AI Technical Summary

Problems solved by technology

Since the diode will generate a higher temperature during operation, as the temperature of the diode continues to rise, the resistance in the diode will continue to increase, causing the diode to generate more heat, thereby wasting more power resources and entering a vicious circle

In order to ensure better heat dissipation of the photovoltaic junction box, the method of increasing the volume of the installation cavity in the photovoltaic junction box is generally adopted, thereby increasing the thickness and volume of the entire photovoltaic junction box. More importantly, it is difficult to achieve good heat dissipation by using this method cooling effect

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