Wiring box for solar photovoltaic electrification component

Abstract

The invention relates to a junction box of a solar photovoltaic generating unit and belongs to the technical field of solar power component. The junction box comprises a box cover, a box body and an electric switching device consisting of a set of bypass diodes; the electric switching device is arranged inside the box body; the box cover is arranged on the box body; the electric switching device also comprises a set of radiating ribs which at least have the same number with the bypass diodes; each bypass diode is arranged on the radiating rib; two sides of the length direction of the box body form a box wing respectively; the bottom of the outer side of the middle part in the length direction of the box body is alternately extended with convex strips; a ventilating channel is formed between two convex strips; and the ventilating channel is communicated with a ventilating port which is arranged on the box body and is communicated with outside. The junction box has the advantages that the bypass diode is fixed on the radiating rib; heat produced by the bypass diode is evenly dissipated through the radiating rib; the bottom of the box body is extended with the convex strips; and after the box body is arranged on a solar photovoltaic cell plate, the box body does not shade the solar photovoltaic cell plate so as to facilitate heat dissipation.

Description

technical field [0001] The invention belongs to the technical field of solar power components, and in particular relates to a junction box of a solar photovoltaic power generation component. Background technique [0002] There is no shortage of junction boxes for solar photovoltaic power generation modules in the published Chinese patent documents, for example: A. Authorized announcement number CN2716748Y recommends an improved structure for solar module junction boxes; another example is B. Publication number CN101138098A recommends solar modules The junction box of the output line and the installation method of the junction box; also as C. Authorized announcement number CN200941388Y introduced the plug-in box of solar photovoltaic power generation components; another example D. Authorized announcement number CN201075856Y disclosed a new type of solar photovoltaic metal junction box, etc. Wait. The technical purpose of the above document A is to solve the ventilation in th...

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Problems solved by technology

[0003] The above-mentioned patents or patent applications have the following disadvantages: First, because the bypass diodes of the electrical switching device that perform the transfer between the lead wires of the solar photovoltaic power generation silicon crystal plate and the external lead wires are directly bonded or fitted Therefore, when the junction box of the solar photovoltaic power generation module is working in solar photovoltaic power generation, the current flowing through the bypass diode will cause the bypass diode to heat up, and the heat dissipation of the bypass diode often shows serious inhomogeneity. Bypass diodes are open-circuited at high temperatures and lose their function, which will eventually affect the safe operation of solar photovoltaic power generation silicon crystal panels, and even burn the solar power generation silicon crystal panels; In the state, it is attached to the solar photovoltaic panel, that is, it is attached to the back of the solar photovoltaic panel. Therefore, the junction box of any structure described in the above patent will give the solar photovoltaic panel (silicon panel for short). Partial shading is caused, which is not conducive to the heat dissipation of the silicon plate, and ultimately affects the service life of the silicon plate

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