Intelligent photovoltaic module and junction box thereof

Abstract

The invention provides an intelligent photovoltaic module and a junction box thereof. An intelligent controller is arranged in the junction box; the intelligent controller comprises a current voltage acquisition module, a temperature acquisition module and a communication module; the junction box is further provided with a current detecting element and a voltage detecting element used for detecting the current and the voltage of the photovoltaic module, and sending the detecting signal to the current voltage acquisition module; a temperature sensor is arranged in the junction box and on the back plate of the photovoltaic module separately; the temperature sensor sends the detecting signal to the temperature acquisition module; and the communication module sends the information of the intelligent photovoltaic module to a photovoltaic monitoring system. Compared with the conventional photovoltaic module and the junction box thereof, the intelligent photovoltaic module and the junction box thereof havefunctions of data acquisition, communication and the like; the management function on the photovoltaic module is reinforced, and a data reference source is provided for problem analysis for the photovoltaic module.

Description

technical field [0001] The invention belongs to the technical field of photovoltaic power generation, and in particular relates to an intelligent photovoltaic module and a junction box thereof. Background technique [0002] Solar (photovoltaic) cells are devices that directly convert light energy into electrical energy through the photoelectric effect. Sunlight shines on the semiconductor p-n junction to form new hole-electron pairs. Under the action of the p-n junction electric field, holes flow from the n region to the p region, electrons flow from the p region to the n region, and a current is formed after the circuit is turned on. At present, it is mainly divided into monocrystalline silicon, polycrystalline silicon, and amorphous silicon solar cells. Because the current and voltage of a single solar cell are small, it is necessary to connect the photovoltaic cells in series and parallel to obtain a higher and larger current before they can be used directly. The device...

AI Technical Summary

Problems solved by technology

The main problems that may occur in the use of photovoltaic modules are: hidden cracks, poor contact or breakage of bus bars and solder strips, poor heat dissipation of junction boxes, poor contact of junction boxes, etc.

There are many reasons for these problems, but the main impact on battery components is the reduction of power generation efficiency and heat burnout

Because the photovoltaic module does not have measures to detect current and temperature, it can only be discovered after the problem occurs during use, and measures cannot be taken in advance to deal with it

[0005] It can be seen that the existing conventional photovoltaic modules have the following defects: 1) cannot detect the module temperature

When the inside of the junction box is insufficiently filled with glue or the terminals are in poor contact, it will cause the junction box and components to be burned; 2) There is no detection method for the efficiency attenuation process

The attenuation of photovoltaic modules is a gradual process. The junction box does not have current and voltage detection components, so it is impossible to detect the components, and problems cannot occur in advance and should be dealt with

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