CN107681008A - A kind of photovoltaic module convergent belt - Google Patents

Abstract

The invention provides a confluence belt for photovoltaic modules, comprising: a confluence part and a folded part, a linear structure is provided between the confluence part and the folded part to facilitate the folded part, and the linear structure and the confluence Belt edges are parallel. Compared with the prior art, the present invention adopts a linear structure parallel to the confluence belt, which is directly punched or semi-punched, and the processing is simple, no punching waste is generated, raw materials are saved, and the internal stress of the folded part after punching is relatively small. Small, the battery chip is not easy to break.

Description

Convergence belt for photovoltaic module

technical field

The invention relates to the field of welding strips, in particular to a bus strip for photovoltaic modules.

Background technique

As the current lead-out wire in the solar module, the bus belt plays an important role in guiding the current collected by the solar cells into the junction box. At present, a few battery modules use folded welding ribbons. In the patent document with the notification number CN205488166U, a bus strip is disclosed. As shown in Figure 1, the bus strip 1 is welded to both ends of the battery string 2, and the part that is not connected to the battery string is folded over to the battery On the back of the string, this method can increase the effective light area of the front of the cell and improve the utilization rate of light energy. However, due to the thick material of the bus strip itself and the large internal stress, it is easy to cause wrinkles on the folded edge and the appearance of the battery after being folded. Broken phenomenon.

In the patent document with the notification number CN206163503U, a foldable welding ribbon with a hollow part is disclosed, which makes it easier to fold the welding ribbon. However, the hollowed out portion increases the width of the raw material for welding the ribbon, and a large amount of waste is generated during punching, which increases the production cost.

Contents of the invention

In order to overcome the shortcomings of the above-mentioned prior art, the object of the present invention is to provide a busbar for photovoltaic modules.

In order to achieve the above purpose, the technical solution adopted by the present invention to solve the technical problems is: a confluence belt for photovoltaic modules, including: a confluence part and a turning part, and a The folding part is a linear structure that is turned over, and the linear structure is parallel to the edge of the bus belt.

Compared with the prior art, the present invention adopts a linear structure parallel to the confluence belt, which is directly punched or semi-punched, and the processing is simple, no punching waste is generated, raw materials are saved, and the internal stress of the folded part after punching is relatively small. Small, the battery chip is not easy to break.

Further, the linear structure is formed by discontinuous arrangement of cutting lines.

Further, the ratio of the total length of the cutting lines to the total length of the confluence belt is 1/2-2/3.

Using the above-mentioned preferred solution, the thin blade is used for direct punching and forming, and the appropriate cutting line length can effectively reduce the internal stress of the folding, and at the same time ensure the connection strength between the confluence part and the folding part.

Further, one or more linear structures are arranged in parallel on the confluence belt.

Further, when multiple linear structures are arranged in parallel on the confluence belt, the cutting lines on adjacent linear structures are arranged in a staggered state.

Using the above-mentioned optimal solution, punching multiple linear structures can meet the model requirements of more battery sheets, improve versatility, and reduce manufacturing costs; the staggered arrangement of cutting lines improves the overall strength of the confluence strip.

Further, the linear structure is formed by arranging cutting lines and half-cutting lines alternately.

By adopting the above preferred solution, the internal stress of folding can be eliminated to the greatest extent, the cells are not easy to be damaged, and the overall durability of the photovoltaic module is improved.

Further, the linear structure is formed by discontinuous arrangement of half punching lines.

By adopting the above preferred solution, the connection strength between the confluence part and the folded part of the welding strip can be ensured.

Further, the linear structure is an entire half-cutting line.

By adopting the above preferred solution, the punching is more convenient and the processing cost is reduced.

Further, the cross-section of the linear structure is a continuous combination of multiple parabolic grooves, and the opening of a single parabolic groove matches the thickness of the photovoltaic module cell sheet.

Using the above-mentioned preferred scheme, it can adapt to the errors of various types of cells or welding fixtures. The continuous parabolic groove greatly eliminates the internal stress at the fold. One of the parabolic grooves fits the edge of the cell and is adjacent The parabolic groove is deformed under pressure, and the edge of the groove is pressed more tightly with the battery sheet, which improves the welding firmness of the confluence part and the battery sheet, and improves the current exporting ability.

Further, the surface of the bus section is coated with a layer of conductive silver paste.

Using the above preferred solution, the use of the conductive silver paste layer can effectively reduce the welding temperature between the bus belt and the battery sheet, prevent the battery sheet from being broken by high temperature, and improve the yield of photovoltaic modules.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Figure 1 is a schematic diagram of the connection between the busbar and the battery string;

Figure 2a is a schematic structural view of an embodiment of the present invention;

Fig. 2b is a sectional view along A-A in Fig. 2a;

Fig. 2c is a B-B cross-sectional view in Fig. 2a;

Figure 3a is a schematic structural view of another embodiment of the present invention;

Fig. 3b is a sectional view along C-C in Fig. 3a;

Fig. 3c is a D-D cross-sectional view in Fig. 3a;

Fig. 4a is a schematic structural view of another embodiment of the present invention;

Figure 4b is a cross-sectional view of E-E in Figure 4a;

Figure 4c is a cross-sectional view of F-F in Figure 4a;

Figure 5a is a schematic structural view of another embodiment of the present invention;

Fig. 5b is a cross-sectional view along G-G in Fig. 5a;

Figure 5c is a cross-sectional view of H-H in Figure 5a;

Figure 6a is a schematic structural view of another embodiment of the present invention;

Figure 6b is a cross-sectional view of I-I in Figure 6a;

Figure 7a is a schematic structural view of another embodiment of the present invention;

Fig. 7b is a J-J cross-sectional view among Fig. 7a;

Figure 7c is a schematic diagram of the structure of the combination of the bus strip and the battery sheet;

Fig. 8 is a schematic structural diagram of another embodiment of the present invention.

Names of corresponding parts indicated by numbers and letters in the figure:

1-convergence belt; 11-confluence part; 111-conductive silver paste layer; 12-folding part; 13-linear structure; 131-cutting line; 132-half punching line; 133-parabolic groove; 2-battery string ; 21-battery sheet.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

As shown in Figure 2a, one embodiment of the present invention is: a confluence belt for photovoltaic modules, including: a confluence part 11, a folded part 12, and an The linear structure 13 that is folded over the part 12 is parallel to the edge of the bus belt.

The beneficial effect of adopting the above-mentioned technical solution is: the linear structure 13 parallel to the confluence belt is adopted, directly punched or semi-punched, the processing is simple, no punching waste is generated, raw materials are saved, and the internal stress of the folded part after punching is reduced. Smaller, the battery chip is not easy to break.

As shown in Figures 2a, 2b, and 2c, in other embodiments of the present invention, in order to achieve both easy folding and connection strength, the linear structure 13 is formed by discontinuous arrangement of cutting lines 131; the total length of cutting lines 131 accounts for The ratio of the total length of the confluence belt is 1/2-2/3. The beneficial effect of adopting the above technical solution is: the thin blade is used for direct punching and forming, and the appropriate cutting line length can not only effectively reduce the internal stress of the folding, but also ensure the connection strength between the confluence part and the folding part.

As shown in Figures 3a, 3b, and 3c, in other embodiments of the present invention, in order to achieve the purpose of improving adaptability, multiple linear structures 13 are arranged in parallel on the confluence belt; The lines 131 are arranged in a staggered state. The beneficial effects of adopting the above technical solution are: punching multiple linear structures 13 can meet the model requirements of more cells, improve versatility, and reduce manufacturing costs; the staggered arrangement of cutting lines 131 improves the overall strength of the confluence strip.

As shown in Figures 4a, 4b, and 4c, in other embodiments of the present invention, in order to achieve the purpose of easy folding, the linear structure 13 is formed by an arrangement of cutting lines 131 and half-punching lines 132 alternately. The beneficial effect of adopting the above technical solution is that the internal stress of folding can be eliminated to the greatest extent, the cells are not easy to be damaged, and the overall durability of the photovoltaic module is improved.

As shown in Figures 5a, 5b, and 5c, in other embodiments of the present invention, in order to ensure the connection strength, the linear structure 13 is formed by discontinuous arrangement of half-cutting lines 132 . The beneficial effect of adopting the above technical solution is that the connection strength between the confluence part and the folded part of the welding strip can be ensured.

As shown in FIGS. 6 a and 6 b , in other embodiments of the present invention, the linear structure 13 is a whole half-cutting line 132 for the purpose of making it convenient. The beneficial effect of adopting the above technical solution is that punching is easier and the processing cost is reduced.

As shown in Figures 7a, 7b, and 7c, in other embodiments of the present invention, in order to achieve the purpose of optimizing the folded structure, the cross section of the linear structure 13 is a continuous combination of multiple parabolic grooves 133, and a single parabolic groove The opening of 133 matches the thickness of the cell sheet 21 of the photovoltaic module. The beneficial effect of adopting the above technical solution is: it can adapt to the errors of various types of battery sheets or welding fixtures, and the continuous parabolic groove greatly eliminates the internal stress at the folded place, and one of the parabolic grooves 133 is in contact with the edge of the battery sheet 21 Fitting, the adjacent parabolic grooves are deformed under pressure, and the edges of the grooves are pressed more tightly with the battery sheets, which improves the welding firmness of the confluence part and the battery sheets, and improves the current exporting ability.

As shown in FIG. 8 , in some other embodiments of the present invention, in order to achieve the purpose of improving soldering performance, the surface of the bus part 11 is coated with a conductive silver paste layer 111 . The beneficial effect of adopting the above technical solution is: the use of the conductive silver paste layer 111 can effectively reduce the welding temperature between the busbar and the battery sheet, prevent the battery sheet from being broken by high temperature, and improve the yield of photovoltaic modules.

The above-described embodiments are only to illustrate the technical concept and characteristics of the present invention, and its purpose is to allow those of ordinary skill in the art to understand the content of the present invention and implement it, and cannot limit the protection scope of the present invention with this. All equivalent changes or modifications shall fall within the protection scope of the present invention.

Claims (10)

1. A kind of 1. photovoltaic module convergent belt, it is characterised in that including：Conflux portion, folding portion, the portion of confluxing, folding portion it Between be provided with and be easy to the linear structure that is turned down to folding portion, the linear structure is parallel with convergent belt edge.
2. 2. photovoltaic module convergent belt according to claim 1, it is characterised in that the linear structure is interrupted for cutting line Arrangement forms.
3. 3. photovoltaic module convergent belt according to claim 2, it is characterised in that it is total that cut-out line length summation accounts for convergent belt Long ratio is 1/2-2/3.
4. 4. photovoltaic module convergent belt according to claim 3, it is characterised in that be arranged with one in parallel on the convergent belt Bar or a plurality of linear structure.
5. 5. photovoltaic module convergent belt according to claim 4, it is characterised in that be arranged with parallel when on the convergent belt During a plurality of linear structure, the cross-shaped state arrangement of cutting line in the adjacent linear structure.
6. 6. photovoltaic module convergent belt according to claim 1, it is characterised in that the linear structure is cutting line, half Die-cut line one forms every an arrangement.
7. 7. photovoltaic module convergent belt according to claim 1, it is characterised in that the linear structure is between half die-cut line Disconnected arrangement forms.
8. 8. photovoltaic module convergent belt according to claim 1, it is characterised in that the linear structure is that whole piece half is punched Line.
9. 9. photovoltaic module convergent belt according to claim 1, it is characterised in that the cross section of the linear structure is more The continuous combination of individual parabola groove, opening and the photovoltaic module cell piece thickness of the single parabola groove match.
10. 10. according to any described photovoltaic module convergent belts of claim 1-9, it is characterised in that the portion surface painting of confluxing It is covered with conductive silver slurry layer.