Bus bar, photovoltaic module and photovoltaic power generation system

Abstract

The utility model discloses a bus bar, a photovoltaic assembly and a photovoltaic power generation system. The bus bar comprises a first surface and a second surface. The first surface and the second surface are opposite to each other along the thickness direction of the bus bar body, at least one of the first surface and the second surface is provided with a plurality of mutually parallel grooves, the plurality of grooves extend from one side of the bus bar to the other side of the bus bar and penetrate through the edge of at least one side, and the grooves are suitable for being matched with a welding strip. The plurality of mutually parallel grooves are formed in at least one of the first surface and the second surface of the bus bar, so that the contact area between the welding strip and the bus bar can be increased, the welding area between the welding strip and the bus bar is increased, the welding stability and reliability between the welding strip and the bus bar are effectively improved, the probability of poor pseudo soldering is reduced, and the service life of the bus bar is prolonged. And the product quality and power are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to photovoltaic module production technical field especially is related to a busbar, photovoltaic module and photovoltaic power generation system. BACKGROUND

[0002] In prior art, the busbar is rectangular, the surface of the busbar contacting with the solder strip is a plane, the solder strip contacts with the busbar and is welded, the welding area is small, and the welding is unstable. SUMMARY

[0003] The utility model discloses at least one of the technical problems in prior art is solved. To this end, one purpose of the utility model is to provide a busbar, which can improve the stability and reliability of welding.

[0004] A second purpose of the utility model is to provide a photovoltaic module, which comprises a cell sheet, a plurality of solder strips and the busbar according to any one of the first aspect embodiments.

[0005] A third purpose of the utility model is to provide a photovoltaic power generation system, which comprises the busbar according to any one of the first aspect embodiments or the photovoltaic module according to the second aspect embodiments.

[0006] According to the busbar of the first aspect embodiments of the utility model, the busbar comprises a first surface and a second surface, the first surface and the second surface are opposite along the thickness direction of the busbar body, at least one of the first surface and the second surface is formed with a plurality of mutually parallel grooves, a plurality of the grooves extend from one side to the other side of the busbar and penetrate at least one side edge, and the grooves are adapted to cooperate with the solder strip.

[0007] According to the busbar of the embodiments of the utility model, by forming a plurality of mutually parallel grooves in at least one of the first surface and the second surface of the busbar, the contact area of the solder strip and the busbar can be increased, the welding area between the solder strip and the busbar is increased, the welding stability and reliability between the solder strip and the busbar are effectively improved, the probability of false welding defects is reduced, and the product quality and power are improved.

[0008] In some embodiments, the grooves are recessed from the first surface to the second surface; and / or, the grooves are recessed from the second surface to the first surface.

[0009] In some embodiments, the busbar comprises a plurality of body parts and a bending part, the bending part is arranged between two adjacent body parts, the bending part is connected with the two adjacent body parts, and the grooves are recessed from the first surface to the second surface of the bending part.

[0010] In some embodiments, the second surface of the bending portion protrudes from the second surface of the body portion.

[0011] In some embodiments, the second surface of the bending portion is flush with the second surface of the body portion.

[0012] In some embodiments, the cross-sectional shape of the groove is polygonal, the polygonal shape comprising at least: a first contact surface and a second contact surface, the first and second contact surfaces being adapted to contact the solder strip simultaneously.

[0013] In some embodiments, the first and second contact surfaces are formed with an included angle a, the a satisfying: 0 < a < 180°.

[0014] In some embodiments, the cross-sectional shape of the groove is arc-shaped.

[0015] The photovoltaic module according to the second aspect of the present application comprises: a cell, a plurality of solder strips and a bus bar, the cell is provided with a plurality of grid lines; the plurality of solder strips are respectively connected perpendicularly to the plurality of grid lines; the bus bar is arranged on a side of the solder strip away from the cell, the bus bar is connected with the plurality of solder strips, and the bus bar is the bus bar according to any one of the first aspect of the present application.

[0016] The photovoltaic power generation system according to the third aspect of the present application comprises the bus bar according to any one of the first aspect of the present application or the photovoltaic module according to the second aspect of the present application.

[0017] Additional aspects and advantages of the present application will be partially given in the following description, partially will become obvious from the following description, or will be understood by the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0018] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

[0019] Figure 1 is a schematic view of the cross-sectional shape of the groove according to the first aspect of the present application, the cross-sectional shape of the groove being polygonal;

[0020] Figure 2 is a schematic view of the cross-sectional shape of the groove according to the first aspect of the present application, the cross-sectional shape of the groove being arc-shaped;

[0021] Figure 3 is a schematic view of the photovoltaic module according to the second aspect of the present application.

[0022] LIST OF REFERENCE NUMERALS:

[0023] 100, busbar;

[0024] 10, first surface; 11, second surface;

[0025] 20, groove; 21, first contact surface; 22, second contact surface;

[0026] 30, solder strip;

[0027] 40, body part; 41, bending part;

[0028] 200, photovoltaic module;

[0029] 50, cell. DETAILED DESCRIPTION

[0030] The embodiments of the present application are described in detail below with reference to the accompanying drawings. The embodiments described with reference to the accompanying drawings are exemplary, and the following description is made with reference to Figures 1-3 The busbar 100 according to the embodiments of the present application is described. The busbar 100 comprises a first surface 10 and a second surface 11.

[0031] Specifically, as shown in Figure 1 and Figure 2 The first surface 10 and the second surface 11 are opposite along the thickness direction of the body of the busbar 100. At least one of the first surface 10 and the second surface 11 is formed with a plurality of grooves 20 parallel to each other. The plurality of grooves 20 extend from one side to the other side of the busbar 100 and penetrate at least one side edge. The grooves 20 are adapted to cooperate with the solder strip 30.

[0032] That is, the solder strip 30 can be arranged adjacent to at least one of the first surface 10 and the second surface 11 of the busbar 100. The first surface 10 or the second surface 11 adjacent to the solder strip 30 is formed with a plurality of grooves 20. The plurality of grooves 20 are arranged at intervals along the length direction of the busbar 100. The grooves 20 are adapted to form a soldering cooperation with the solder strip 30. The grooves 20 extend along the width direction of the busbar 100. The grooves 20 can penetrate the partial surface of the one side and the partial surface of the other side opposite to the one side along the width direction of the busbar 100. The two ends of the grooves 20 along the width direction of the busbar 100 are respectively opposite to the solder strip 30, so as to facilitate the cooperation and contact of the solder strip 30 with the busbar 100 and the installation of the solder strip 30, and improve the assembly efficiency. The length direction and the width direction of the busbar 100 are perpendicular.

[0033] According to the bus bar 100, the plurality of recesses 20 are formed in at least one of the first surface 10 and the second surface 11 of the bus bar 100, the contact area between the solder strip 30 and the bus bar 100 is increased, the welding area between the solder strip 30 and the bus bar 100 is increased, the welding stability and reliability between the solder strip 30 and the bus bar 100 are effectively improved, the probability of false welding is reduced, and the product quality and power are improved.

[0034] According to some embodiments of the utility model, as shown in Figure 1 and Figure 2 The recess 20 is recessed from the first surface 10 to the second surface 11, or the recess 20 is recessed from the second surface 11 to the first surface 10, or the recess 20 is recessed from the first surface 10 to the second surface 11, and the recess 20 is recessed from the second surface 11 to the first surface 10.

[0035] In the embodiment, the first surface 10 is provided with the recess 20, the solder strip 30 is arranged adjacent to the first surface 10, and the recess 20 is formed by recessing from the first surface 10 of the bus bar 100 to the second surface 11 along the thickness direction of the bus bar 100. For the recess 20 formed by recessing from the second surface 11 to the first surface 10, it is not repeated here.

[0036] Optionally, the recess 20 can be formed on the first surface 10 and the second surface 11 at the same time, that is, the recess 20 is formed by recessing from the first surface 10 to the second surface 11, and at the same time, the recess 20 is formed by recessing from the second surface 11 to the first surface 10.

[0037] Therefore, by arranging on the first surface 10 and / or the second surface 11 adjacent to the solder strip 30, the contact area between the solder strip 30 and the bus bar 100 can be increased, and at the same time, the height of the solder strip 30 after welding with the bus bar 100 can be reduced, and the space utilization rate can be improved.

[0038] According to some embodiments of the utility model, as shown in Figure 1 The bus bar 100 comprises a plurality of body portions 40 and a bending portion 41, the bending portion 41 is arranged between two adjacent body portions 40, the bending portion 41 is connected with the two adjacent body portions 40, and the recess 20 is formed by recessing from the first surface 10 to the second surface 11 of the bending portion 41.

[0039] That is, the bending part 41 is connected with two adjacent body parts 40 at two ends of the busbar 100 along the length direction of the busbar 100, and the bending part 41 is formed by bending the first surface 10 of the busbar 100 along the thickness direction of the busbar 100 towards the second surface 11, and the first surface 10 of the bending part 41 is recessed towards the second surface 11 to form the groove 20. That is, the groove 20 can be directly formed by bending the busbar 100. Thus, the bending part 41 is arranged between the two adjacent body parts 40, the bending part 41 is connected with the two adjacent body parts 40, the groove 20 is formed by recessing the first surface 10 of the bending part 41 towards the second surface 11, the groove 20 can be defined on the busbar 100, the formation of the groove 20 is facilitated, the process of forming the groove 20 is simplified, and the processing efficiency of arranging the groove 20 is improved.

[0040] According to some embodiments of the present application, as shown in Figure 1 the second surface 11 of the bending part 41 protrudes from the second surface 11 of the body part 40.

[0041] That is, in the present embodiment, the second surface 11 of the bending part 41 protrudes from the second surface 11 of the body part 40 along the thickness direction of the busbar 100 and away from the first surface 10. The busbar 100 is bent at a position opposite to the solder strip 30 to form the groove 20, thereby cooperating with the solder strip 30. Thus, the second surface 11 of the bending part 41 protrudes from the second surface 11 of the body part 40, the first surface 10 of the bending part 41 can be matched with the arc surface of the solder strip 30, the contact area between the solder strip 30 and the first surface 10 of the busbar 100 is increased, the reliability of the soldering between the busbar 100 and the solder strip 30 is effectively improved, the process of forming the groove 20 is facilitated, and the structural strength of the formed groove 20 is increased.

[0042] According to some embodiments of the present application, as shown in Figure 2 the second surface 11 of the bending part 41 is flush with the second surface 11 of the body part 40.

[0043] Optionally, in the present embodiment, the second surface 11 of the bending part 41 can be flush with the second surface 11 of the body part 40 along the thickness direction of the busbar 100, that is, the first surface 10 of the bending part 41 can be directly formed into a recessed area by using a scraper or the like. Thus, the second surface 11 of the bending part 41 is flush with the second surface 11 of the body part 40, the structural strength of the busbar 100 is increased while the contact area between the busbar 100 and the solder strip 30 is increased, the service life of the busbar 100 is prolonged, the soldering efficiency between the busbar 100 and the solder strip 30 is improved, the thickness of the photovoltaic module 200 using the above busbar 100 is reduced, the use of the adhesive film for bonding the busbar 100 and the cell sheet 50 in the photovoltaic module 200 is reduced, the cost is reduced, the light and thin design of the photovoltaic module 200 is realized.

[0044] According to some embodiments of the present utility model, as shown in Figure 1 The cross-sectional shape of the groove 20 is a polygon, and the polygon at least includes a first contact surface 21 and a second contact surface 22, and the first contact surface 21 and the second contact surface 22 are adapted to simultaneously contact the solder strip 30.

[0045] That is, in the present embodiment, after the groove 20 is formed on the first surface 10 of the bus bar 100, the cross-sectional shape of the groove 20 is a rectangle or a triangle, and the solder strip 30 simultaneously contacts the first contact surface 21 and the second contact surface 22 of the groove 20. Thus, the solder strip 30 simultaneously contacts the first contact surface 21 and the second contact surface 22 included in the groove 20, which can avoid the solder strip 30 only contacting the bottom of the groove 20, thereby avoiding the situation that the solder strip 30 and the bus bar 100 cannot be firmly welded, and simultaneously making the solder strip 30 and the groove 20 form line contact at multiple positions, increasing the contact area of the bus bar 100 and the solder strip 30, which can improve the welding strength of the solder strip 30 and the bus bar 100, and further improve the reliability and stability of the welding of the solder strip 30 and the bus bar 100.

[0046] According to some embodiments of the present utility model, as shown in Figure 1 The first contact surface 21 and the second contact surface 22 form an included angle α, and α satisfies: 0 < α < 180°.

[0047] If the included angle formed by the first contact surface 21 and the second contact surface 22 is equal to 180°, the first contact surface 21 and the second contact surface 22 extend in a direction away from each other, the first contact surface 21 and the second contact surface 22 are coplanar, and the solder strip 30 line contacts one of the first contact surface 21 or the second contact surface 22, which is not conducive to improving the welding strength of the solder strip 30 and the bus bar 100. Thus, the range of the included angle formed by the first contact surface 21 and the second contact surface 22 is limited, which facilitates reasonable setting of the size of the groove 20, realizes limiting the solder strip 30, and simultaneously improves the welding efficiency of the solder strip 30 and the bus bar 100. Moreover, since the solder strip 30 directly contacts the groove 20, the processing precision of the solder strip 30 and the groove 20 can be reduced, the processing efficiency of the solder strip 30 and the bus bar 100 is improved, and thus the assembly efficiency of the photovoltaic module 200 is improved.

[0048] According to some embodiments of the present utility model, as shown in Figure 2 The cross-sectional shape of the groove 20 is an arc.

[0049] Optionally, in the embodiment, the cross-sectional shape of the groove 20 can be arc-shaped. The arc shape can be adjusted according to the cross-sectional shape of the solder strip 30, so that the solder strip 30 is tightly fitted with the groove 20. Thus, the cross-sectional shape of the groove 20 is arc-shaped, which can form an arc surface contact between the groove 20 and the solder strip 30, increase the contact area of the bus bar 100 and the solder strip 30, ensure the welding reliability of the bus bar 100 and the solder strip 30, and avoid the occurrence of virtual welding between the bus bar 100 and the solder strip 30, thereby improving the production quality.

[0050] According to the photovoltaic module 200 of the second aspect of the present application, as shown in Figure 3 The photovoltaic module 200 includes a cell sheet 50, a plurality of solder strips 30, and a bus bar 100. The cell sheet 50 is provided with a plurality of grid lines. The plurality of solder strips 30 are respectively connected perpendicularly to the plurality of grid lines. The bus bar 100 is arranged on the side of the solder strip 30 away from the cell sheet 50. The bus bar 100 is connected to the plurality of solder strips 30. The bus bar 100 is the bus bar 100 of any one of the first aspect of the present application.

[0051] According to the photovoltaic module 200 of the present application, the cell sheet 50 is provided with a plurality of grid lines. The plurality of solder strips 30 are arranged perpendicularly to the plurality of grid lines. Each solder strip 30 is connected to a plurality of grid lines. The plurality of solder strips 30 respectively extend out of the edges of the cell sheet 50. The bus bar 100 is connected to the plurality of solder strips 30 extending out of the edges of the cell sheet 50. The same bus bar 100 can be connected to the solder strips 30 on the plurality of cell sheets 50 to realize the collection and output of current on the plurality of cell sheets 50, thereby improving the power of the photovoltaic module 200. In addition, the groove 20 is arranged on the bus bar 100 to enable the solder strip 30 to be located in the groove 20, thereby increasing the contact area of the solder strip 30 and the bus bar 100, improving the welding effect of the solder strip 30 and the bus bar 100, effectively preventing the displacement of the solder strip 30 during the lamination process of the photovoltaic module 200, ensuring the quality of lamination and welding, reducing the internal resistance of the structural member in the photovoltaic module 200, and improving the reliability of the photovoltaic module 200.

[0052] According to the photovoltaic power generation system of the third aspect of the present application, the bus bar 100 is according to any one of the first aspect of the present application, or the photovoltaic module 200 is according to the second aspect of the present application.

[0053] According to the photovoltaic power generation system of the present application, the reliability of the photovoltaic power generation system can be improved, the service life of the photovoltaic power generation system can be prolonged, and the output power of the photovoltaic power generation system can be improved.

[0054] In the description of the utility model, need understanding is, the term "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and so on the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawing, just is for the convenience of describing the utility model and simplifying the description, and not indicate or imply the device or element indicated must have a particular orientation, with a particular orientation configuration and operation, therefore can not be understood as the restriction of the utility model.

[0055] In the description of the utility model, "first feature", "second feature" can include one or more features.In the description of the utility model, "multiple" means two or more than two.In the description of the utility model, the first feature is "on" or "below" the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them.In the description of the utility model, the first feature is "on", "above" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature.

[0056] In the description of the specification, the description of the reference terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model.In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example.

[0057] Although the embodiments of the utility model have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the utility model, and the scope of the utility model is defined by the claims and its equivalents.

Claims

1. A busbar, characterized in that, The bus bar comprises: a first surface and a second surface opposite to each other along the thickness direction of the bus bar body, at least one of the first surface and the second surface is formed with a plurality of mutually parallel grooves, the plurality of grooves extend from one side to the other side of the bus bar and penetrate at least one side edge, the grooves are adapted to cooperate with the solder strip, the grooves comprise a first contact surface and a second contact surface, the first contact surface and the second contact surface are adapted to contact the solder strip at the same time, the cross-sectional shape of the grooves is triangular, the first contact surface and the second contact surface form an included angle α, and the α satisfies: 0 < α < 180; The bus bar comprises: a plurality of body parts; a bending part provided between two adjacent body parts, the bending part is connected with the two adjacent body parts, and the second surface of the bending part protrudes from the second surface of the body part.

2. The busbar of claim 1, wherein The grooves are recessed from the first surface to the second surface; and / or, The grooves are recessed from the second surface to the first surface.

3. The busbar of claim 1, wherein The second surface of the bending part is flush with the second surface of the body part.

4. The busbar of claim 1, wherein The cross-sectional shape of the grooves is polygonal, and the polygonal shape at least comprises: a first contact surface; a second contact surface, the first contact surface and the second contact surface are adapted to contact the solder strip at the same time.

5. The busbar of claim 1, wherein The cross-sectional shape of the grooves is arc-shaped.

6. A photovoltaic module, characterized by, Comprise: a battery piece provided with a plurality of grid lines; a plurality of solder strips, each of the plurality of solder strips is connected perpendicularly to a plurality of grid lines; a bus bar provided on the side of the solder strip away from the battery piece, the bus bar is connected with a plurality of solder strips, and the bus bar is the bus bar according to any one of claims 1-5.

7. A photovoltaic power system, characterized by, Comprise the bus bar according to any one of claims 1-5, or the photovoltaic module according to claim 6.

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