Intelligent hot-spot resistant photovoltaic assembly

Abstract

The invention discloses an intelligent hot-spot resistant photovoltaic assembly, and the assembly comprises an aluminum alloy frame, a first cover plate layer, a first package layer, a battery piece layer, a second package layer, a second cover plate layer, and a junction box. The battery piece layer is provided with a plurality of power optimization chips and a diode chip, and the battery piece layer comprises a plurality of battery strings. Each battery string is formed by the series connection of a plurality of battery pieces welded through a plurality of solder strips, and the battery strings are connected with each other through convergence strips. A power optimization chip is in parallel connection with the battery strings, and the diode chip is in reverse parallel connection with the battery pieces. The diode chip is in reverse parallel connection with each battery piece, thereby completely eliminating the hot-spot effect which may happen to the assembly, and improving the reliability of the assembly. The power optimization chip is connected with each battery string, thereby eliminating the mismatching between the battery strings, and enabling the power output of the batterystrings and the overall power output of the assembly to be maximized.

Description

technical field [0001] The invention relates to the field of solar photovoltaic power generation, in particular to an intelligent anti-hot spot photovoltaic module. Background technique [0002] In recent years, the photovoltaic power generation system composed of photovoltaic modules, inverters, controllers and batteries has received more and more attention, and its application fields have become more and more extensive. Photovoltaic power generation systems can be applied to various environments, such as residential roofs, industrial roofs, mountains, deserts, lakes, remote areas, islands, etc., and use solar resources in the environment to convert light energy into clean electrical energy, which greatly reduces Environmental pressure and energy pressure brought by thermal power generation. [0003] Photovoltaic modules are the basic components of photovoltaic power generation systems. At present, the widely used photovoltaic modules are basically made of ultra-white low-...

AI Technical Summary

Problems solved by technology

[0006] Due to the limitations of the current technology and process, the diodes of the components are generally set in the junction box, and the number is generally about 3. Each diode is connected in reverse parallel with a string of battery slices, and its protection function is limited.

When shading occurs, the shaded battery will still consume a large amount of power, and its temperature will also increase significantly, which has potential hidden dangers, and the overall output power of the module will also be significantly reduced

In addition, because each string of cells is connected in series, when the electrical performance parameters of each string of cells are inconsistent, there will be a large mismatch, especially in the case of shading, which will further increase the power loss of the module

Images