Solar photovoltaic module spring contact type junction box and installation method thereof

Abstract

The invention discloses a solar photovoltaic module spring contact type junction box which comprises a junction box body, the external structure of the junction box body mainly comprises a box body and a box base, an electric conductor is arranged in the junction box body, the front end of the electric conductor is connected with a cable, the middle end of the electric conductor is connected witha diode, and the rear end of the electric conductor is fixedly provided with a metal ejector pin with a spring. The pouring sealant is poured into the junction box body, and the bottom surface of thebox base is provided with a double faced adhesive tape. The junction box is mainly characterized in that the box bottom is provided with an annular groove and an overflow groove, a mode of combining the adhesive and the double faced adhesive tape is adopted to replace an existing mode of simply using the double faced adhesive tape, and when the junction box body is installed on the backboard glass, the double faced adhesive tape ensures that the metal thimble and the bus bar are in close contact before the adhesive is cured; the cured adhesive ensures the long-term sealing performance betweenthe junction box body and the backboard glass and the contact stability between the metal thimble and the bus bar, and overcomes the defect of instability in the prior art.

Description

technical field [0001] The invention belongs to the technical field of junction boxes, and in particular relates to a spring contact junction box of a solar photovoltaic module and an installation method thereof. Background technique [0002] Solar photovoltaic cells are devices that directly convert solar radiation energy into electrical energy. Photovoltaic modules are products made of multiple photovoltaic cells connected in series and parallel, and then packaged. They are the basic units in photovoltaic power generation systems. The photovoltaic module junction box is a key device for introducing the electric energy generated by solar photovoltaic cells into the power supply system. The function of the junction box is to ensure the reliable connection of the circuit. To achieve this, on the one hand, the connection between the conductor inside the junction box and the photovoltaic module bus belt must be reliable and stable, and the contact impedance is the lowest. On th...

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Problems solved by technology

The usual method is to open a hole in the bottom plate of the photovoltaic junction box, and paste double-sided tape on the surface of the bottom plate of the junction box, and the conductor with the spring passes through the opening on the bottom plate of the junction box and the opening on the back glass of the solar cell module. The bus strip attached to the module battery is in contact, and the conductor of the junction box and the bus strip of the photovoltaic module are connected together by the adhesive force of the double-sided adhesive and the tension of the spring. The method depends on the quality of the double-sided adhesive, the double-sided adhesive The bonding force and bonding quality with the back glass and the bottom plate of the junction box have the risk of the junction box falling off due to the weakened bonding force, and there are also poor bonding. There are residual air bubbles between the double-sided adhesive tape and the back glass, and water seepage occurs. , the risk of leakage

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