Photovoltaic junction box

Abstract

The invention discloses a photovoltaic junction box which comprises an upper cover, a shell, a diode and a conducting bar, wherein the upper cover is provided with a breathable film, and the breathable film is fixed on the upper cover through a breathable film sealing plug. The photovoltaic junction box has the following benefits of good heat dissipation performance and capability of avoiding hot mark effect of a solar panel; the junction box can be used for locking a bus bar tightly without using a tool, has high locking force and low contact resistance, and is convenient to operate; and the upper cover is buckled by utilizing the diagonal bracing principle, thus thermal deformation of the upper cover is avoided in the long-term usage. The upper cover is utilized to lock a waterproof nut so as to avoid the waterproof nut loosening in the long-term usage.

Description

technical field [0001] The invention relates to a solar photovoltaic junction box. Background technique [0002] The solar photovoltaic junction box is a key component of the energy output of the solar panel. Its quality and performance directly affect its energy conversion efficiency. At present, the products produced by the manufacturers of the solar photovoltaic junction box have backward technology and unstable product quality. The outstanding problems are: 1. The internal temperature of the junction box is high and the waterproof performance is poor. Due to the high internal temperature, the solar panel is damaged due to the hot spot effect, which affects the service life of the solar panel; 2. The confluence belt Tools are needed for installation, and the contact area is small and the contact resistance is large, which is easy to cause heat damage and increase resistance; 3. The connection between the upper cover and the shell is mostly connected by the upper cover as ...

AI Technical Summary

Problems solved by technology

[0002] The solar photovoltaic junction box is a key component of the energy output of the solar panel. Its quality and performance directly affect its energy conversion efficiency. At present, the products produced by the manufacturers of the solar photovoltaic junction box have backward technology and unstable product quality. The outstanding problems are: 1. The internal temperature of the junction box is high and the waterproof performance is poor. Due to the high internal temperature, the solar panel is damaged due to the hot spot effect, which affects the service life of the solar panel; 2. The confluence belt Tools are needed for installation, and the contact area is small and the contact resistance is large, which is easy to cause heat damage and increase resistance; 3. The connection between the upper cover and the shell is mostly connected by the upper cover as a buckle of the deformable body. After a period of thermal deformation, it is very fast It is easy to open or loosen without tools, resulting in the reduction or failure of waterproof performance; 4. The waterproof nut cannot be self-locked and easy to open by hand

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