Photovoltaic half-piece assembly confluence welding structure

Abstract

The utility model discloses a confluence welding structure of a photovoltaic half-piece assembly. The confluence welding structure comprises a first half-piece battery piece, a second half-piece battery piece, a confluence belt and a welding belt, the bus bar is arranged between the first half battery piece and the second half battery piece; the first half battery piece and the second half battery piece are connected with the bus bar through the welding strips; the welding strip is provided with a connecting part welded with the bus bar; the connecting part is of a spiral structure; the two corresponding connecting parts share one spiral center point and are arranged on the bus bar in a staggered mode. According to the utility model, the welding strip with the connecting part is arranged, the connecting part is of the spiral structure, and the connection between the welding strip and the bus bar is completed through the connecting part, so that the contact area between the welding strip and the bus bar can be increased more in a set area, the firmness during welding is enhanced, and the conditions such as insufficient welding are prevented.

Description

Technical Field

[0001] The utility model relates to the photovoltaic field, in particular to a photovoltaic half-cell assembly convergence welding structure. Background Art

[0002] Solar power generation is a technology that uses the photovoltaic effect of semiconductor interfaces to directly convert light energy into electrical energy. Half-cell modules are a module structure that can greatly reduce internal consumption. Its basic principle is to cut the cell into two halves to reduce internal circuit losses. In the prior art, half-cell modules are designed to be divided into two parts, and both parts must converge the circuit to the middle convergence belt. Currently, common convergence methods include the following two methods.

[0003] Method 1: The upper and lower welding strips are aligned and welded on the busbar. This welding method makes the welding area small and there is a risk of welding failure.

[0004] Method 2: The upper and lower welding strips are overlapped and welded on the busbar. Although this welding method has sufficient welding area, the thickness of the overlapping part will increase, affecting the reliability of the product.

[0005] Therefore, a photovoltaic half-cell assembly busbar welding structure is needed to solve the above problems. Utility Model Content

[0006] The utility model aims to provide a photovoltaic half-cell assembly busbar welding structure to increase the contact area between the welding strip and the busbar and enhance the firmness during welding.

[0007] In order to solve the above technical problems, the utility model provides a photovoltaic half-cell assembly busbar welding structure, comprising a first half-cell cell, a second half-cell cell, a busbar and a welding strip;

[0008] The busbar is arranged between the first half cell and the second half cell;

[0009] The first half of the battery cell and the second half of the battery cell are both connected to the busbar through the welding tape;

[0010] The welding strip has a connection portion welded to the busbar;

[0011] The connecting portion is configured as a spiral structure;

[0012] The two corresponding connection parts share a spiral center point and are arranged in a staggered manner on the busbar.

[0013] Furthermore, the busbar is provided with a spiral groove matching the connecting portion.

[0014] Furthermore, the connecting portion is embedded in the spiral groove, and the outer surface is exposed outside the spiral groove.

[0015] Furthermore, the depth of the spiral groove is one half to two thirds of the thickness of the connecting portion.

[0016] Furthermore, the connecting portion and the welding belt are integrally formed.

[0017] Furthermore, a plurality of welding strips are provided, and the positions of the welding strips on the first half of the battery cell and the second half of the battery cell correspond to each other one by one.

[0018] Furthermore, the width of the connecting portion is greater than the width of the welding band.

[0019] Furthermore, the connecting portion is configured as a flat structure.

[0020] Furthermore, a spacing is preset between two corresponding connecting parts.

[0021] Compared with the prior art, the utility model has at least the following beneficial effects:

[0022] By providing a welding strip with a connecting portion, and the connecting portion is in a spiral structure, and the connection between the welding strip and the busbar is completed through the connecting portion, the contact area between the welding strip and the busbar can be increased more within a given area, so as to enhance the firmness during welding and prevent the occurrence of cold welding and the like. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a top view of the photovoltaic half-cell assembly busbar welding structure of the utility model;

[0024] Figure 2 For this utility model Figure 1 Enlarged view of point A in the middle;

[0025] Figure 3 It is a top view of the cross-sectional view of the busbar in the busbar welding structure of the photovoltaic half-cell module of the utility model;

[0026] Figure 4 It is a side cross-sectional view of the busbar in the busbar welding structure of the photovoltaic half-cell module of the present invention.

[0027] Figure numbers: 1, first half of the battery cell; 2, second half of the battery cell; 3, busbar; 31, spiral groove; 4, welding belt; 41, connecting part. DETAILED DESCRIPTION

[0028] The photovoltaic half-cell assembly busbar welding structure of the utility model will be described in more detail below in conjunction with the schematic diagram, wherein the preferred embodiment of the utility model is shown. It should be understood that those skilled in the art can modify the utility model described herein and still achieve the beneficial effects of the utility model. Therefore, the following description should be understood as being widely known to those skilled in the art and not as a limitation to the utility model.

[0029] The present invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the accompanying drawings are in very simplified form and in non-precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0030] like Figures 1 to 4 As shown, an embodiment of the utility model proposes a photovoltaic half-cell assembly busbar welding structure, including a first half-cell battery cell 1, a second half-cell battery cell 2, a busbar ribbon 3 and a welding ribbon 4.

[0031] The busbar 3 is disposed between the first half cell 1 and the second half cell 2 , and is used to return the circuits in the first half cell 1 and the second half cell 2 to the busbar 3 .

[0032] The first half cell 1 and the second half cell 2 are both connected to the busbar 3 via the welding ribbon 4 .

[0033] The welding strip 4 has a connection portion 41 welded to the busbar 3 , that is, the contact area between the welding strip 4 and the busbar 3 is mainly located at the connection portion 41 .

[0034] It should be noted that the connecting portion 41 is configured as a spiral structure, so that the contact area between the welding strip 4 and the busbar 3 can be increased within a given area, so as to enhance the firmness of welding and effectively prevent the occurrence of cold welding.

[0035] It should be noted that the two corresponding connecting portions 41 share a spiral center point (eg Figure 2 The two connecting portions 41 are arranged in a staggered manner on the busbar 3, that is, the two connecting portions 41 are arranged mutually, without occupying an additional area of ​​the busbar 3, that is, the contact area between the welding belt 4 and the busbar 3 can be increased as much as possible within a limited area.

[0036] like Figure 3 and Figure 4As shown, in other embodiments, in order to facilitate the welding operation of the connecting portion 41 and ensure that the connecting portion 41 will not be misaligned during welding, thereby improving the stability during welding, a spiral groove 31 matching the connecting portion 41 is provided on the busbar 3 for installing the connecting portion 41 in the spiral groove 31.

[0037] Specifically, the connecting portion 41 is embedded in the spiral groove 31, and the outer surface is exposed outside the spiral groove 31, that is, the connecting portion 41 is arranged in a protruding shape on the busbar 3 to facilitate the operator to perform welding, and under the limiting effect of the spiral groove 31, the connecting portion 41 will not shake or misalign due to interference from external factors during the welding process, thereby improving the stability during welding.

[0038] The depth of the spiral groove 31 is one-half to two-thirds of the thickness of the connecting portion 41 , so that the connecting portion 41 can protrude to the outside of the busbar 3 to facilitate welding.

[0039] The connecting portion 41 and the welding belt 4 are integrally formed.

[0040] In a further embodiment, a plurality of welding bands 4 are provided, and the positions of the welding bands 4 on the first half-cell battery cell 1 and the second half-cell battery cell 2 correspond one to one.

[0041] In order to further increase the contact area between the welding strip 4 and the busbar 3 , the size of the connecting portion 41 is further limited. Specifically, the width of the connecting portion 41 is greater than the width of the welding strip 4 . In addition, the connecting portion 41 can also be set to a flat structure.

[0042] It should be noted that a preset interval is provided between two corresponding connecting portions 41 to reserve a welding interval to prevent interference during welding.

[0043] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A photovoltaic half-cell assembly busbar welding structure, characterized in that: It includes a first half cell, a second half cell, a busbar and a welding strip; The busbar is arranged between the first half cell and the second half cell; The first half of the battery cell and the second half of the battery cell are both connected to the busbar through the welding tape; The welding strip has a connection portion welded to the busbar; The connecting portion is configured as a spiral structure; The two corresponding connection parts share a spiral center point and are arranged in a staggered manner on the busbar.

2. The photovoltaic half-cell assembly busbar welding structure according to claim 1, characterized in that: The busbar is provided with a spiral groove matching the connecting portion.

3. The photovoltaic half-cell assembly busbar welding structure according to claim 2, characterized in that: The connecting portion is embedded in the spiral groove, and an outer surface is exposed outside the spiral groove.

4. The photovoltaic half-cell assembly busbar welding structure according to claim 2, characterized in that: The depth of the spiral groove is one half to two thirds of the thickness of the connecting portion.

5. The photovoltaic half-cell assembly busbar welding structure according to claim 1, characterized in that: The connecting portion and the welding belt are integrally formed.

6. The photovoltaic half-cell assembly busbar welding structure according to claim 1, characterized in that: A plurality of welding strips are provided, and the positions of the welding strips on the first half of the battery cell and the second half of the battery cell correspond to each other.

7. The photovoltaic half-cell assembly busbar welding structure according to claim 1, characterized in that: The width of the connecting portion is greater than the width of the welding strip.

8. The photovoltaic half-cell assembly busbar welding structure according to claim 1, characterized in that: The connecting portion is configured as a flat structure.

9. The photovoltaic half-cell assembly busbar welding structure according to claim 1, characterized in that: A distance is preset between two corresponding connecting parts.

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