Junction box of solar photovoltaic component

Abstract

The invention discloses a junction box of a solar photovoltaic component and belongs to the technical field of solar battery components. The junction box comprises a junction box body, a box cover, a group of bypass diodes and a group of conductive connection mechanisms, wherein the junction box body is provided with a box cavity and an embedding pin seat; the box cover is provided with an embedding pin; the group of bypass diodes are provided with first pins and second pins and arranged in the box cavity; the group of conductive connection mechanisms are arranged in the box cavity; and at least one bypass diode is arranged between each two adjacent conductive connection mechanisms. The junction box is characterized in that: a conductive connection mechanism seat is formed in the box cavity; the conductive connection mechanism seat comprises a lower pressing plate seat and a conductive connecting plate fitting seat; and the conductive connection mechanisms comprise upper and lower pressing plates, a conductive connecting plate, a first wire clamp and a second wire clamp. The junction box has the advantages of reducing contact resistance and temperature rise, prolonging the service life of each bypass diode, always guaranteeing the clamping effects on the first and second pins of the bypass diodes without influence of deformation of the heated junction box body, shortening the length of the embedding pin, and contributing to enhancement of the rigidity of the embedding pin to avoid breakage.

Description

technical field [0001] The invention belongs to the technical field of solar cell components, and in particular relates to a solar photovoltaic component junction box. Background technique [0002] The solar photovoltaic junction box is an important part of outputting solar power. It is a transitional device that connects the solar cell leads with the external leads. It usually consists of a box cover, a junction box body, a bypass diode installed in the junction box body, wires and cables and The conductive connection mechanism is formed. The function of the aforementioned bypass diode is to avoid damage to the solar photovoltaic cell due to reverse charging and to prevent the normal operation of the entire solar photovoltaic cell assembly from being compromised due to a short circuit of one solar photovoltaic cell. [0003] As is well known in the industry, when solar photovoltaic power generation, the current will flow through the aforementioned bypass diodes in the body...

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Problems solved by technology

[0006] In short, the above-mentioned patents and patent application schemes have positive significance for the heat dissipation of the junction box, but there are still the following shortcomings: one is that the extension is formed on the box cover The inlays are easily damaged, because the above-mentioned prior art often uses the inlays and the bottom of the inlays formed on the junction box body to be fitted or hooked, that is to say, the inlays are matched with the bottom of the insets , so when the bypass diode in the junction box body needs to be replaced, it is easy to break due to the lengthy inlays; the second is that the fixing method of the conductive connection mechanism in the junction box body is unreasonable, and the nuts are usually pre-armored On the bottom wall of the junction box body, it is integrated with the junction box body, or screw holes are provided on the bottom wall of the junction box body (lines 3 to 9 of paragraph 0024 on page 3 of the instruction manual of CN101944546A), After the fixing screw passes through the hole on the conductive connection plate, the fixing screw is screwed into the nut armored on the bottom wall of the junction box or screwed into the screw hole on the bottom wall, so that the conductive connection mechanism fixed in the junction box

However, when heated (heat generated by the bypass diode), the nut pressed together with the bottom wall of the junction box will loosen, which will lose its effect on the positioning of the bypass diode, affect the electrical connection effect, and even cause an open circuit; The third is that the structure of the conductive connection mechanism is unreasonable, so that the contact resistance of the bypass diode is large, the temperature rise is large when the bypass diode flows through the current, and the current bearing capacity is weak, which affects the service life of the bypass diode

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