阅读说明：本技术 一种消除光伏组件无效区域光能损失的方法及光伏组件 (Method for eliminating light energy loss of photovoltaic module invalid area and photovoltaic module ) 是由 姜冲 吴新社 杨睿 于 2019-10-09 设计创作，主要内容包括：本发明公开了一种消除光伏组件无效区域光能损失的方法及光伏组件,在光伏组件的玻璃面板上与电池片上的主栅线对应的位置以及电池片阵列拼接间隙和无效边缘对应的位置处,设置复合抛物面将经过复合抛物面的光线反射到电池片的有效区域,以消除电池片的主栅线、拼接间隙及无效边缘处的光能损失。本发明通过在电池片主栅线位置的复合抛物面不仅可以减少这部分区域的光能损失而且还能适当增加主栅线的宽度或者调整主栅线的数目来减少光伏组件中焊带造成的电能损耗。(The invention discloses a method for eliminating light energy loss of an invalid area of a photovoltaic assembly and the photovoltaic assembly. According to the invention, the compound paraboloid at the position of the main grid line of the cell can reduce the optical energy loss of the partial area, and the width of the main grid line can be properly increased or the number of the main grid lines can be adjusted to reduce the electric energy loss caused by welding strips in the photovoltaic module.)

1. The method for eliminating the light energy loss of the ineffective area of the photovoltaic module is characterized in that a composite paraboloid is arranged on a glass panel of the photovoltaic module, the composite paraboloid is arranged at the position, corresponding to a main grid line on a cell piece, on the glass panel and at the position, corresponding to a splicing gap and an ineffective edge of a cell piece array, of the glass panel, light rays passing through the composite paraboloid are reflected to the effective area of the cell piece so as to eliminate the light energy loss of the main grid line, the splicing gap and the ineffective edge of the cell piece, and the composite paraboloid is a total reflection or mirror reflection composite paraboloid.

2. The method of claim 1, wherein a compound parabolic solder strip for collecting current is further disposed on the cell segment busbar.

3. The method of claim 1, wherein the compound paraboloid at the splicing gap of the cell array is made of an insulating and high-reflectivity material.

4. The method of claim 1, wherein a triangular boss, paraboloid or compound paraboloid is used on the glass panel at the cell array gap or the dead edge of the photovoltaic module to reduce the loss of light energy at the dead edge.

5. The method of claim 1, wherein the convex portion of the compound paraboloid is convex to one side of the cell.

6. The photovoltaic module is characterized by comprising a battery piece, a glass panel and a back plate, wherein the glass panel is located above the battery piece, the back plate is located below the battery piece, a welding strip used for collecting current is further arranged on a main grid line on the battery piece, the main grid line or the welding strip is located between the battery piece and the glass panel, a compound paraboloid is arranged on the glass panel, the compound paraboloid is arranged at a position corresponding to the main grid line and a position corresponding to a splicing gap and an invalid edge of the battery piece array, and the compound paraboloid is a total reflection or mirror reflection compound paraboloid.

7. The photovoltaic module for eliminating the light energy loss of the ineffective area according to claim 6, characterized in that a compound parabolic solder strip for collecting the current is further arranged on the main grid line, and the compound parabolic solder strip is a total reflection or mirror reflection compound parabolic surface.

8. The photovoltaic module of claim 6, wherein the compound paraboloid at the splicing gap of the cell array is made of an insulating and high-reflectivity material.

9. The photovoltaic module of claim 6, wherein the inactive edge is a triangular boss, a paraboloid or a compound paraboloid.

10. The photovoltaic module of claim 6, wherein the convex portion of the compound paraboloid protrudes toward one side of the cell.

Technical Field

The invention relates to a method for eliminating light energy loss of an invalid area of a photovoltaic module and the photovoltaic module, and belongs to the technical field of photovoltaics.

Background

The photovoltaic module generally includes a cell for photoelectric conversion, and a glass panel and a back plate for encapsulating the cell, the glass panel is located above the cell, the back plate is located below the cell, a solder strip for collecting current is further disposed on the cell, the solder strip is located on the main grid line, and the solder strip is located between the cell and the glass panel.

The welding strip is an important raw material in the welding process of the photovoltaic module, is positioned at the position of the main grid line and is used for connecting the cell and the cell, and the collection efficiency of the current of the photovoltaic module is directly influenced by the quality of the welding strip, so that the power of the photovoltaic module is greatly influenced. The photovoltaic solder strip is applied to connection between the photovoltaic module cells and plays an important role in electric conduction. In the production of photovoltaic modules, in order to improve the efficiency of photovoltaic modules, the loss of light energy is generally reduced by reducing the width of the main grid lines and by adopting the appropriate number of the main grid lines. The light collection rate is improved by reflecting part of light rays at the main grating line position by adopting the welding strip with a circular or triangular cross section, so that part of light loss is reduced.

However, this method can only be applied to the main grid line position, and cannot play a role in reducing the light energy loss for the cell array gaps and the ineffective edges. Moreover, the reflectivity is low due to the high light absorptivity of the metal reflecting surface of the welding strip, the reflecting surface is easy to damage in the welding process, and the manufacturing cost is increased.

Disclosure of Invention

In order to overcome the above technical problems, the present invention provides a method for eliminating light energy loss in an inactive area of a photovoltaic module and a photovoltaic module.

According to one object of the invention, the invention provides the following technical scheme:

a method for eliminating optical energy loss of an invalid area of a photovoltaic assembly is characterized in that a composite paraboloid is arranged on a glass panel of the photovoltaic assembly, the composite paraboloid is arranged at a position, corresponding to a main grid line on a battery piece, on the glass panel and at a position, corresponding to a splicing gap and an invalid edge of a battery piece array, and light rays passing through the composite paraboloid are reflected to the valid area of the battery piece so as to eliminate optical energy loss of the main grid line, the splicing gap and the invalid edge of the battery piece, and the composite paraboloid is a total reflection or mirror reflection composite paraboloid.

Furthermore, a compound parabolic welding strip for collecting current is further arranged on the main grid line of the battery piece.

Further, the compound paraboloid at the splicing gap of the cell array is made of an insulating and high-reflectivity material.

Further, a boss, a paraboloid or a compound paraboloid with a triangular section is adopted on the glass panel at the cell array gap or the ineffective edge of the photovoltaic module to reduce the light energy loss of the ineffective edge.

Further, the convex part of the compound paraboloid protrudes to one side of the battery piece.

According to another object of the invention, the invention provides the following technical scheme:

the photovoltaic module comprises a cell, a glass panel and a back plate, wherein the glass panel is located above the cell, the back plate is located below the cell, a welding strip used for collecting current is further arranged on a main grid line on the cell, the main grid line or the welding strip is located between the cell and the glass panel, a compound paraboloid is arranged on the glass panel, the compound paraboloid is arranged at a position corresponding to the main grid line and a position corresponding to an invalid edge of a cell array splicing gap, and the compound paraboloid is a total reflection or mirror reflection compound paraboloid.

Furthermore, a composite parabolic welding strip for collecting current is arranged on the main grid line, and the composite parabolic welding strip is a total reflection or mirror reflection composite parabolic surface.

Further, the compound paraboloid at the splicing gap of the cell array is made of an insulating and high-reflectivity material.

Further, a boss, a paraboloid or a compound paraboloid with a triangular section are adopted at the invalid edge.

Further, the convex part of the compound paraboloid protrudes to one side of the battery piece.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the method for eliminating the light energy loss of the ineffective area of the photovoltaic assembly, the composite paraboloid structure is arranged at the position of the main grid line of the cell corresponding to the protective glass panel of the photovoltaic assembly and at the position corresponding to the splicing gap and the ineffective edge of the cell array, so that the light energy loss of the main grid line, the splicing gap and the ineffective edge of the cell is eliminated, and the part of light rays of the ineffective area which is newly increased can be collected by the cell through the composite paraboloid. Meanwhile, the width of a main grid line can be properly increased, the sectional area of a welding strip is increased, and the resistance of a lead is reduced, so that the electric energy loss caused by the welding strip in the photovoltaic module is reduced.

2. According to the method for eliminating the light energy loss of the photovoltaic module invalid area, the light collection range is expanded to the whole receiving surface of the photovoltaic module and then converged to the effective area of the cell array, the compound paraboloid adopted on the protective glass panel collects the light rays of the invalid area in a mirror reflection or total reflection mode, and the light collection rate is far higher than that of a triangular solder strip in the splicing technology. The composite paraboloid can reduce the absorption of stray light by using the edge ray principle, and is beneficial to reducing the dark current generated by the photoelectric effect of the cell.

Drawings

FIG. 1 is a longitudinal partial cross-sectional view of a glass panel of a photovoltaic module according to the present invention.

Fig. 2 is a light path diagram of a composite paraboloid of the splicing gap and the ineffective edge of the cell piece.

FIG. 3 is a schematic view of the reflection of light from the glass panel of the photovoltaic module through the compound parabolic reflector according to the present invention.

In the figure, 1-glass panel, 2-compound paraboloid at main grid line, 3-compound paraboloid at longitudinal gap, 4-critical light, 5-incident light, 6-transverse gap compound paraboloid emission light path, and 7-cell main grid line compound paraboloid light path.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.