Junction box

Abstract

The invention provides a junction box which comprises a shell, a plurality of wire connectors, a plurality of power supply changeover units, a first guide part element and a second guide element, wherein the shell is provided with an opening and used for introducing a plurality of wire pairs through the opening; the shell is provided with a first power output end and a first power output end; the wire connectors are arranged in the shell and used for connecting with the multiple wire pairs; the power supply changeover units are detachably connected with the wire connectors; each power supply changeover unit is provided with a first guide part and a second guide part; the first guide element is connected with the first guide parts of the power supply changeover units and the first power output end; and the second guide element is connected with the second guide parts of the power supply changeover units and the second power output end. The electric connection mechanism provided by the invention has the advantage of simple structure, has cost benefit, and is easier for installation and maintenance.

Description

Technical field [0001] The invention relates to a junction box, in particular to a junction box applied to solar or photovoltaic modules. Background technique [0002] Because photovoltaic solar energy has many advantages, it has become one of the most promising renewable energy sources in the world today. Basically, photovoltaic solar energy is freely available, it does not require fuel, does not generate waste or pollution, and the solar generator it uses requires only a small amount of effort to maintain, and it can be used continuously at low operating costs without special management20 To 30 years. On the other hand, solar generators can also be easily installed in general homes, schools or business premises, and there is no need for special handling construction or additional floor space at the location where they are equipped with assembly equipment. Safe and quiet operation. In remote areas, it is easier to construct a system of the required size to produce its own sup...

AI Technical Summary

Problems solved by technology

[0005] However, the existing electrical connection mechanism of the junction box cannot meet the requirements of distributed maximum power tracking (Distributed MPPT, DMPPT) technology, and because the electrical connection mechanism in the junction box has positive and negative output terminals, it is desired to transmit through the electrical connection mechanism If the power supply is connected to the power output terminal of the junction box, a wiring circuit must be added in the junction box to electrically connect the positive output terminal of the electrical connection mechanism to the positive output terminal of the junction box, and electrically connect the negative output terminal of the electrical connection mechanism. To the negative output of the junction box

Adding a wiring circuit in the junction box not only complicates the structure and increases the difficulty of the internal circuit of the junction box, but also increases the cost

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