An interconnection structure applied to a photovoltaic module and a photovoltaic module

Abstract

This utility model discloses an interconnection structure and a photovoltaic module for use in photovoltaic modules, relating to the field of photovoltaic module manufacturing technology. It includes: a main body, elongated in shape, for electrically connecting multiple solar cells of the photovoltaic module; at least one dispensing port penetrating the main body in its thickness direction; and at least one additional connecting portion, each additional connecting portion disposed around the dispensing port between the main body and the solar cells of the photovoltaic module. This embodiment, by providing multiple dispensing ports along the length direction of the interconnection structure and the additional connecting portions surrounding the dispensing ports, restricts the flow of adhesive, ensuring the welding performance of the welding points on the fine grid.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic module manufacturing technology, and in particular to an interconnection structure for photovoltaic modules and a photovoltaic module. Background Technology

[0002] In existing gridless photovoltaic (PV) modules, interconnecting strips are typically used to replace the main grid lines in conventional solar cells. The interconnecting strips are pre-fixed to the gridless cells, and then further soldered between the interconnecting strips and the fine grid lines on the gridless cells during the PV module lamination process. Existing methods for pre-fixing the interconnecting strips include dispensing adhesive, such as placing the interconnecting strip first and then dispensing adhesive between the interconnecting strip and the cell, or dispensing adhesive onto the cell first and then placing the interconnecting strip, with the adhesive positioned between the cell and the interconnecting strip. Adhesive with a certain degree of fluidity can easily flow to the solder joints between the interconnecting strip and the fine grid lines, thus affecting the contact between the solder joints and the interconnecting strip, causing loose connections in the module. Utility Model Content

[0003] In view of this, the present invention provides an interconnection structure and a photovoltaic module for use in photovoltaic modules. By providing multiple dispensing ports and additional connecting portions around the dispensing ports along the length direction of the interconnection structure perpendicular to the grid, the flow of adhesive is restricted, thus ensuring the welding performance of the welding sites on the grid.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0005] In a first aspect, the present invention provides an interconnection structure for photovoltaic modules, comprising: a body, which is elongated and used to electrically connect multiple solar cells of the photovoltaic module; at least one dispensing port that penetrates the body in the thickness direction of the body; and at least one additional connecting portion, each of the additional connecting portions being disposed around the dispensing port between the body and the solar cells of the photovoltaic module.

[0006] Optionally, each of the additional connection portions includes: a first enclosure member disposed around the dispensing port between the body and the battery cell.

[0007] Optionally, each of the additional connecting portions further includes a second enclosure member, which is disposed around the first enclosure member and spaced apart from the first enclosure member between the body and the battery cell.

[0008] Optionally, each of the additional connecting parts further includes an overflow groove formed between the first enclosure member and the second enclosure member.

[0009] Optionally, the thickness of the first enclosure member and the second enclosure member are equal, and / or the depth of the overflow groove is greater than the thickness of the first enclosure member and the second enclosure member.

[0010] Optionally, the opening size of the end of the first enclosure member away from the battery cell matches the opening size of the dispensing port at the end closer to the battery cell.

[0011] Optionally, the area of ​​the dispensing nozzle along the cross-section perpendicular to the thickness direction of the body is equal to or gradually decreases from the end away from the battery cell to the end near the battery cell, and / or, the area of ​​the inner wall of the first enclosure member along the cross-section perpendicular to the thickness direction of the body is equal to or gradually decreases from the end away from the battery cell to the end near the battery cell.

[0012] Optionally, the first enclosure component is integrally formed with the main body.

[0013] Secondly, this utility model provides a photovoltaic module, comprising: a backsheet, a backing film, a cell array, a fronting film, and a cover plate stacked from bottom to top, wherein the cell array includes a plurality of cells and a plurality of interconnect structures connecting adjacent cells in series, wherein the cells are provided with a plurality of first grids having a first polarity and a plurality of second grids having a second polarity, the first grids and the second grids extending along a first direction and alternately arranged along a second direction perpendicular to the first direction; the interconnect structures are any of the above-described interconnect structures, extending along the second direction and the plurality of interconnect structures are spaced apart in the first direction; one of two adjacent interconnect structures is connected to each of the first grids through a conductive material and insulated from each of the second grids through an insulating material; the other of two adjacent interconnect structures is connected to each of the second grids through a conductive material and insulated from each of the first grids through an insulating material.

[0014] The first aspect of the above-mentioned utility model has the following advantages or beneficial effects: by providing at least one dispensing port in the length direction of the interconnect structure, and surrounding each dispensing port with an additional connecting part, the dispensing port can be used for dispensing, and the surrounding additional connecting part restricts the flow of adhesive, prevents the adhesive from contacting the solder joint, and ensures the welding performance of the soldering points on the fine grid. Attached Figure Description

[0015] The accompanying drawings are provided to better understand this utility model and do not constitute an undue limitation thereof. Wherein:

[0016] Figure 1 This is a schematic diagram of the overall structure of the interconnection structure applied to a photovoltaic module according to an embodiment of the present utility model;

[0017] Figure 2 This is a partially enlarged structural diagram of region A according to an embodiment of the present invention;

[0018] Figure 3 This is a partially enlarged structural diagram of region A according to another embodiment of the present invention;

[0019] Figure 4 This is a bottom view of an interconnection structure according to an embodiment of the present invention;

[0020] Figure 5 This is a bottom view of the interconnection structure according to another embodiment of the present invention;

[0021] Figure 6 This is a graph showing the electroluminescence test results of existing photovoltaic modules;

[0022] Figure 7 This is a graph showing the electroluminescence test results of the photovoltaic module provided by this utility model;

[0023] Figure 8 This is a schematic diagram of the overall structure of a photovoltaic module according to an embodiment of the present utility model;

[0024] Figure 9 This is a schematic diagram showing the positional relationship between the interconnect structure and the battery cell according to an embodiment of the present invention;

[0025] Figure 10 This is a top view of the battery cell according to an embodiment of the present invention.

[0026] The attached figures are labeled as follows:

[0027] 1-Main body; 2-Glue dispensing port; 3-Additional connecting part; 31-First enclosure; 32-Second enclosure; 33-Glue overflow groove; 4-Battery cell; 5-Conductive material; 6-Insulating material;

[0028] 100 - Backplate; 200 - Rear adhesive film; 300 - Battery array; 400 - Front adhesive film; 500 - Cover plate. Detailed Implementation

[0029] To facilitate and clearly describe the fabrication method and the solar cell of this invention, exemplary embodiments of this invention are described below with reference to the accompanying drawings. These include various details of the embodiments to aid understanding and should be considered merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this invention. Similarly, for clarity and brevity, descriptions of well-known functions and structures are omitted in the following description.

[0030] Figure 1 A schematic diagram of the interconnection structure applied to photovoltaic modules provided by an embodiment of this utility model is shown. Figure 1 As shown, the interconnection structure for photovoltaic modules provided by this utility model includes: a main body 1, which is elongated and used to electrically connect multiple solar cells 4 of the photovoltaic module; at least one dispensing port 2, which penetrates the main body 1 in the thickness direction; and at least one additional connecting part 3, each additional connecting part 3 being disposed around the dispensing port 2 between the main body 1 and the solar cells 4 of the photovoltaic module. In an optional embodiment, the interconnection structure is used to electrically connect two adjacent solar cells 4 of the photovoltaic module together.

[0031] Existing interconnect structures typically refer to long strip-shaped connections where two adjacent solar cells are welded together to form an electrical connection. First, adhesive is applied to the interconnect structure or solar cells using a dispensing method to fix the interconnect structure. Then, the interconnect structure is welded to a fine grid to allow current to be drawn from the grid. Specifically, because adhesive has a certain degree of fluidity, in existing technologies, the adhesive can flow to the welding point between the interconnect structure and the fine grid, causing poor soldering of the interconnect structure.

[0032] This invention, by setting up a dispensing port 2 and an additional connecting part 3, ensures the reliability of the connection between the interconnect structure and the battery cell 4 by using the additional connecting part 3 around the dispensing port 2 to restrict the flow space between the bottom of the dispensing port 2 and the welding point 5 after the adhesive is poured into the dispensing port 2.

[0033] The following is based on Figure 2 Taking an example, the interconnection structure provided by this utility model will be described in detail. Among them, Figure 2 It shows Figure 1 A magnified view of a portion of region A, particularly to illustrate the specific structure near the dispensing port 2. In an alternative embodiment, each additional connection 3 includes a first containment member 31 disposed around the dispensing port 2 between the body 1 and the battery 4. Figure 1 and Figure 2 As can be seen, in this utility model, the inner wall of the first baffle 31 near the dispensing port is on the same plane as the inner wall of the dispensing port 2, and they are continuous and smooth with each other. That is, the depth of the dispensing port 2 is continued by the inner wall of the first baffle 31, so that after the adhesive is poured into the dispensing port 2, the gap between the dispensing port 2 and the battery cell 4 is reduced, thereby restricting the flow space of the adhesive.

[0034] To prevent misalignment between the inner wall of the first barrier 31 near the dispensing port and the inner wall of the dispensing port 2 during installation, in a further optional embodiment, the opening at the end of the first barrier 31 furthest from the battery cell 4 matches the opening at the end of the dispensing port 2 closest to the battery cell 4, ensuring a continuous and smooth transition between the inner walls of the first barrier 31 and the dispensing port 2. In a further optional embodiment, the first barrier 31 is integrally formed with the main body 1.

[0035] In addition, after the adhesive is poured into the dispensing port 2, the lower surface of the adhesive can contact the battery cell 4, and the side surface of the adhesive can contact the wall of the dispensing port 2, thereby fixing the interconnect structure to the battery cell 4. Compared with the prior art, the adhesive only contacts between the battery cell and the interconnect structure. The contact area between the adhesive and the battery cell and the interconnect structure in this technical solution is increased, which improves the bonding effect. Furthermore, during the subsequent welding process at the welding point 5, the movement of the interconnect structure is reduced, and the welding efficiency is improved.

[0036] In one optional embodiment, the area of ​​the dispensing port 2 along the cross-sectional direction perpendicular to the thickness direction of the body 1 gradually decreases from the end away from the battery cell 4 to the end closer to the battery cell; for example, the dispensing port 2 can be a pedestal structure, wherein the pedestal structure is a circular pedestal or a prismatic pedestal, that is, the cross-section of the dispensing port 2 along the cross-sectional direction perpendicular to the thickness direction of the body 1 is circular or square. For example, as... Figure 2 As shown, to facilitate dispensing at the dispensing port 2, the dispensing port 2 is designed as an inverted frustum shape. This prevents the adhesive from forming protrusions after curing. Furthermore, since the area of ​​the first end face of the dispensing port 2 adjacent to the battery cell 4 is smaller than the area of ​​the second end face away from the battery cell 4, the adhesive can be fully exposed to ultraviolet light from the side away from the battery cell 4 after dispensing, preventing incomplete curing. Specifically, in a further optional embodiment, the first end face is circular with a diameter of 0.5mm to 1mm, for example, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, or 1mm; the second end face is also circular with a diameter of 1mm to 2mm. In another optional embodiment, it can also be as follows... Figure 3 As shown, the area of ​​the dispensing port 2 along the cross-section perpendicular to the thickness direction of the main body 1 is equal from the end away from the battery cell 4 to the end close to the battery cell 4. The dispensing port 2 is set as a cylinder or a cube, and the cross-section along the thickness direction of the main body 1 is circular or square. That is, the area of ​​the first end face of the dispensing port 2 adjacent to the battery cell 4 is the same as the area of ​​the second end face away from the battery cell 4. For the setting of dispensing ports 2 with different shapes, as long as it does not affect the convenience of glue dispensing and the curing efficiency, it can be set according to actual needs. This utility model does not make specific limitations in this regard.

[0037] In an optional embodiment, the area of ​​the cross-section of the inner wall of the first enclosure 31 along the thickness direction perpendicular to the main body 1 is equal or gradually decreases from the end away from the battery cell 4 to the end near the battery cell 4, and the cross-section of the inner wall of the first enclosure 31 along the thickness direction perpendicular to the main body 1 can be circular or square. That is, the inner wall of the first enclosure 31 can be in the shape of a pillar, cylinder, cube, etc.

[0038] In the embodiments of this utility model, such as Figures 1 to 3 As shown, each additional connecting part 3 further includes a second blocking member 32, each second blocking member 32 being disposed around the first blocking member 31 and spaced apart from the first blocking member 31 between the main body 1 and the battery cell 4. That is to say, the present invention also provides a second blocking structure (i.e., the second blocking member 32) between the dispensing port 2 and the welding point 5, which can further limit the position of the adhesive overflowing from the dispensing port 2.

[0039] Understandably, to ensure that the adhesive in the dispensing port 2 does not overflow along the lower surface of the interconnect structure, it is preferable to have both the first blocking member 31 and the second blocking member 32 surrounding the edge of the dispensing port 2. Since both the first blocking member 31 and the second blocking member 32 surrounding the edge of the dispensing port 2 constitute a sealing structure, this arrangement is more effective than simply placing the first blocking member 31 and the second blocking member 32 between the dispensing port 2 and the welding point 5. However, in practical applications, the amount of adhesive overflowing from the dispensing port 2 is relatively small and has weak flowability. Therefore, placing the first blocking member 31 and the second blocking member 32 only between the dispensing port 2 and its adjacent fine grid can also achieve the desired technical effect, reduce material consumption costs, and is more suitable for industrial production.

[0040] It should be noted that when the adhesive overflows from the lower end of the first retaining member 31 along the battery cell 4, it cannot continue to spread due to the obstruction of the second retaining member 32. Therefore, a certain storage space is needed to store the overflowing adhesive. Thus, in a further optional embodiment, the additional connecting part 3 also includes at least one overflow groove 33, each overflow groove 33 being formed between the first retaining member 31 and the second retaining member 32. It should be noted that when there is a certain distance between the first retaining member 31 and the second retaining member 32, the gap between the lower surface of the interconnect structure body 1 and the upper surface of the battery cell 4 can itself store a certain volume of adhesive. However, when the amount of adhesive overflowing is large, it will lift up the interconnect structure, resulting in an excessively large adhesive gap between the interconnect structure and the battery cell 4. Therefore, in this utility model, an overflow groove 33 is provided on the lower surface of the interconnect structure (i.e., the side facing the battery cell 4), and in an optional embodiment, the depth of the overflow groove 33 is greater than the thickness of the first retaining member 31 and the second retaining member 32. By limiting the depth of the overflow groove 33, sufficient overflow space is reserved for the overflowing adhesive.

[0041] In one optional embodiment, the first enclosure member 31 and the second enclosure member 32 have the same thickness. This is because both the first enclosure member 31 and the second enclosure member 32 are disposed on one side of the lower surface of the main body 1. Only when the first enclosure member 31 and the second enclosure member 32 have the same thickness can the main body 1 be guaranteed to be placed horizontally without affecting the overall structure of the solar cell. If the first enclosure member 31 and the second enclosure member 32 have different thicknesses, it will cause the main body 1 to have a wavy shape with varying heights in the horizontal direction, which is not only detrimental to welding stability, but also to the realization of the subsequent lamination process.

[0042] In one optional embodiment, the overflow groove 33 has an arched cross-section perpendicular to the thickness direction of the main body 1, with the open end of the arch facing the battery cell 4. By providing an arched overflow groove 33, the space provided for the overflowing adhesive can further limit the flow area of ​​the adhesive, preventing it from affecting the welding between the interconnect structure and the battery cell 4. Furthermore, for cases where the arched structure is circular, the diameter of the arch of the overflow groove 33 is 0.1mm to 0.2mm, for example, 0.1mm, 0.15mm, 0.5mm, etc. The size of the arch can be set according to the thickness and length of the interconnect structure, the distance between adjacent grids on the battery cell 4, and the location of the solder joints, to ensure sufficient space is provided for the overflow groove 33.

[0043] In another optional embodiment, the shapes of the first barrier 31, the second barrier 32, and the overflow groove 33 can be the same or different, and can also be the same or different from the shape of the dispensing port 2. For example, the shapes of the first barrier 31, the second barrier 32, and the overflow groove 33 can be the same as the shape of the cross-section of the dispensing port 2, all being rectangular (or square), or the shapes of the first barrier 31, the overflow groove 33, and the cross-section of the dispensing port 2 can be circular, while the shape of the second barrier 32 is square. The shapes of the first barrier 31, the second barrier 32, the overflow groove 33, and the cross-section of the dispensing port 2 can be selected as needed. For example, when the cross-section of the dispensing port 2 is a rectangular (or square) structure, the overflow groove 33 is arched, and the first barrier 31 and the second barrier 32 are respectively rectangular-like structures, the cross-sectional structure of the interconnection structure is as follows: Figure 3 As shown, the structure viewed from below is as follows Figure 4 As shown. From Figure 3 and Figure 4 It can be seen that, around the dispensing port 2 of the cuboid, a first retaining member 31, an overflow groove 33, and a second retaining member 32 are arranged from the inside out. For example, when the cross-sectional structure of the interconnection structure is as shown... Figure 2 In the case shown, the top view of the interconnect structure is as follows: Figure 5 As shown, from Figure 2 and Figure 5 It can be seen that around the dispensing port 2 of the cylinder, a first enclosure 31, an overflow groove 33, and a second enclosure 32 are arranged from the inside to the outside.

[0044] In a further optional embodiment, the thickness of the interconnect structure is 0.1mm to 0.4mm, for example, 0.1mm, 0.2mm, 0.3mm, and 0.4mm. The purpose of the interconnect structure is to conduct current from the solar cell 4. If it is too thick, the resistance will be relatively high, generating unnecessary heat and causing current loss; therefore, the thickness of the interconnect structure should not be too thick. If it is too thin, the contact area between the sidewalls of the adhesive and the interconnect structure will be too small, which may lead to poor fixation between the interconnect structure and the solar cell 4. Therefore, the thickness of the interconnect structure should not be too thin either.

[0045] To illustrate the actual effect of this invention, the inventors conducted electroluminescence (EL) tests on photovoltaic modules assembled using conventional interconnect structures and on the photovoltaic module provided by this invention. The test results are as follows: Figure 6 and Figure 7 As shown, where, Figure 6 This is an image showing the EL test results for photovoltaic modules assembled using conventional solder ribbons. Figure 7 This is an image showing the EL test results for the photovoltaic module disclosed in this utility model. (Comparison) Figure 6 and Figure 7 It can be seen that, Figure 6 Multiple strip-shaped shadows appeared, which is because the adhesive spread to the weld points, resulting in incomplete welding. Figure 7 The absence of striped shadows in the middle indicates that the occurrence of cold solder joints can be reduced.

[0046] In summary, the interconnection structure for photovoltaic modules provided by this utility model embodiment restricts the flow of adhesive by setting multiple dispensing ports and additional connecting parts around the dispensing ports along the length direction of the interconnection structure perpendicular to the grid, thus ensuring the welding performance of the welding sites on the grid.

[0047] The following is based on Figure 8 and Figure 9 Taking this as an example, the photovoltaic module provided by this utility model will be specifically described, wherein, Figure 8 A schematic diagram of the overall structure of the photovoltaic module is shown. Figure 9A schematic diagram of the structure showing two adjacent solar cells 4 electrically connected by an interconnection structure is shown. Specifically, the photovoltaic module provided by this utility model includes: a backsheet 100, a backing film 200, a solar cell array 300, a front encapsulant film 400, and a cover plate 500 stacked from bottom to top. The solar cell array 300 includes multiple solar cells 4 and multiple interconnection structures connecting two adjacent solar cells 4 in series. Each solar cell 4 is provided with multiple first grids 41 having a first polarity and multiple second grids 42 having a second polarity. The first grids 41 and second grids 42 extend along a first direction and are alternately arranged along a second direction perpendicular to the first direction. The interconnection structure can be any of the aforementioned interconnection structures, extending along the second direction and the multiple interconnection structures are spaced apart in the first direction. One of two adjacent interconnection structures is connected to each first grid 41 through a conductive material and insulated from each second grid 42 through an insulating material. The other of two adjacent interconnection structures is connected to each second grid 42 through a conductive material and insulated from each first grid 41 through an insulating material.

[0048] from Figure 8 As can be seen, the backplate 100, rear adhesive film 200, battery array 300, front adhesive film 400 and cover plate 500 are actually multi-layer structures stacked together. Common conventional structures can be used for the structure of the backplate 100, rear adhesive film 200, front adhesive film 400 and cover plate 500, and this utility model does not limit them.

[0049] The relative positional relationship between the interconnection structure and the battery cell 4 from a top-view perspective is as follows: Figure 9 As shown, each interconnect structure connects two adjacent solar cells 4. Figure 9 As can be seen, the battery cell 4 in this utility model is an interdigitated back-contact battery cell, that is, each battery cell 4 is provided with first fine grids 41 and second fine grids 42 of different polarities at intervals; and insulating material 6 is alternately provided on each first fine grid 41 and second fine grid 42, so that each interconnection structure is connected only to multiple first fine grids 41 or second fine grids 42 of a single polarity. For ease of understanding, Figure 10 A schematic diagram of the structure of cell 4 without interconnecting structures is shown. From Figure 10 As can be seen, for the interconnection structure corresponding to the first fine grid 41, since the first fine grid 41 and the second fine grid 42 are arranged at intervals, the position that contacts the first fine grid 41 is the conductive material 5, while the position that contacts the second fine grid 42 is the insulating material 6. In this way, after the interconnection structure is soldered, it will only connect with the first fine grid 41 arranged at intervals on the battery cell 4, and will not contact the second fine grid 42.

[0050] In an optional embodiment, the additional connection portion 3 in the interconnect structure is located between adjacent conductive material 5 and insulating material 6. Figure 9and Figure 10 For example, since the purpose of this utility model is to ensure that the adhesive in the dispensing port 2 does not overflow to the conductive material 5 to ensure welding quality, the additional connecting part 3 provided in this embodiment of the utility model will be located at... Figure 10 Between the insulating material 6 and the conductive material 5, that is, between the adjacent first fine grid 41 and the second fine grid 42.

[0051] Therefore, in order to ensure that there is enough space between adjacent first grids 41 and second grids 42 to accommodate additional adhesive portions 3, in an optional embodiment, the spacing between adjacent grids on the battery cell 4 is 0.7mm to 1.4mm, for example, 0.7mm, 1.0mm, 1.2mm, 1.4mm, etc.

[0052] Furthermore, the number of additional connecting parts 3 can be selected according to actual needs. One additional connecting part 3 can be provided between every two adjacent fine grids (i.e., adjacent first fine grid 41 and second fine grid 42), or only a few additional connecting parts 3 can be provided at a few locations for a single battery cell 4. The difference lies only in the quantity of consumables used. Therefore, while minimizing consumable costs, the additional connecting parts 3 in this invention are located near the end of the battery cell 4 in the second direction. That is, only two additional connecting parts 3 can be provided, and the two additional connecting parts 3 are respectively located on two opposite edges of the battery cell 4; wherein the distance between each additional connecting part 3 and its adjacent edge is 0.05mm~0.1mm. It is understandable that, to ensure the interconnection structure can be fixed to the battery cell 4 as much as possible, fixing it at both ends of the battery cell 4 is the simplest method.

[0053] In summary, the photovoltaic module provided by this utility model embodiment can perform adhesive dispensing by providing at least one dispensing port 2 and at least one additional connecting part 3 in the length direction perpendicular to the interconnection structure of the fine grid, and the flow of adhesive is restricted by the additional connecting part 3, thus ensuring the welding performance at the conductive material position on the fine grid.

[0054] The above steps are provided only to help understand the structure, method, and core idea of ​​this utility model. For those skilled in the art, various improvements and modifications can be made to this utility model without departing from its principles, and these improvements and modifications also fall within the scope of protection of the claims of this utility model.

Claims

1. An interconnect structure for application to a photovoltaic module, characterized by, include: The main body (1) is long and narrow, and is used to electrically connect multiple solar cells (4) of the photovoltaic module; At least one dispensing port (2) penetrates the body (1) in the thickness direction of the body (1); At least one additional connection part (3), each of the additional connection parts (3) being disposed between the body (1) and the battery cell (4) around the dispensing port (2).

2. The interconnect structure of claim 1, wherein, Each of the additional connecting parts (3) includes: The first enclosure (31) is disposed around the dispensing port (2) between the main body (1) and the battery cell (4).

3. The interconnect structure of claim 2, wherein, Each of the additional connecting parts (3) further includes: The second enclosure (32) is disposed around the first enclosure (31) and spaced apart from the first enclosure (31) between the main body (1) and the battery cell (4).

4. The interconnect structure of claim 3, wherein, Each of the additional connecting parts (3) further includes: An overflow groove (33) is formed between the first enclosure member (31) and the second enclosure member (32).

5. The interconnection structure according to claim 4, characterized in that, The first enclosure member (31) and the second enclosure member (32) have the same thickness. And / or, The depth of the overflow groove (33) is greater than the thickness of the first enclosure (31) and the second enclosure (32).

6. The interconnect structure of claim 2, wherein, The opening at the end of the first enclosure (31) away from the battery cell (4) matches the opening at the end of the dispensing port (2) near the battery cell (4).

7. The interconnection structure according to claim 6, characterized in that, The area of ​​the dispensing port (2) along the cross-section perpendicular to the thickness direction of the main body (1) is equal or gradually decreases from the end away from the battery cell (4) to the end closer to the battery cell (4). And / or, The area of ​​the cross section of the inner wall of the first enclosure (31) along the thickness direction perpendicular to the main body (1) is equal or gradually decreases from the end away from the battery cell (4) to the end near the battery cell (4).

8. The interconnect structure of claim 7, wherein, The first enclosure component (31) is integrally formed with the main body (1).

9. A photovoltaic module, characterized by, include: The backplate (100), rear adhesive film (200), battery array (300), front adhesive film (400), and cover plate (500) are stacked from bottom to top. The battery array (300) includes multiple battery cells (4) and multiple interconnect structures connecting two adjacent battery cells (4) in series, wherein, The battery cell (4) is provided with a plurality of first fine grids (41) having a first polarity and a plurality of second fine grids (42) having a second polarity. The first fine grids (41) and the second fine grids (42) extend along a first direction and are alternately arranged along a second direction perpendicular to the first direction. The interconnection structure is the interconnection structure according to any one of claims 1-8, extending along the second direction and the plurality of the interconnection structures are spaced apart in the first direction; One of two adjacent interconnect structures is connected to each of the first fine gates (41) through a conductive material and is insulated from each of the second fine gates (42) through an insulating material; The other of the two adjacent interconnect structures is connected to each of the second fine gates (42) by a conductive material and is insulated from each of the first fine gates (41) by an insulating material.

10. The photovoltaic module according to claim 9, characterized in that, The additional connection portion (3) in the interconnect structure is located between adjacent conductive materials and insulating materials. And / or, The additional connection (3) is located near the end of the battery cell (4) in the second direction.

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