Photovoltaic module
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINT NEW ENERGY TECH CO LTD
- Filing Date
- 2025-06-30
- Publication Date
- 2026-07-07
Smart Images
Figure CN224473664U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of photovoltaic power generation technology, and in particular to a photovoltaic module. Background Technology
[0002] A photovoltaic module includes a cell unit, which includes an upper cell module and a lower cell module. The upper cell module and the lower cell module are electrically connected by a conductive strip. The conductive strip is set on the upper cell module and the lower cell module through an insulating film. In the prior art, when the lead wire is set on the conductive strip, a gap will appear between the bottom surface of the conductive strip and the insulating film. This gap makes it easy for air bubbles to be generated in the cell unit and reduces the reliability of the electrical connection. Utility Model Content
[0003] The purpose of this invention is to provide a photovoltaic module that reduces the generation of bubbles and improves the reliability of electrical connections.
[0004] To achieve this objective, the present invention adopts the following technical solution:
[0005] Photovoltaic modules, including:
[0006] The battery unit includes an upper battery module and a lower battery module;
[0007] The upper end busbar is connected to the upper end of the upper battery module;
[0008] The lower end busbar is connected to the lower end of the lower battery module;
[0009] The first conductive strip includes an upper conductive strip and a lower conductive strip. The first ends of the upper conductive strip and the lower conductive strip that are opposite to each other are respectively connected to the upper end busbar and the lower end busbar. The second ends of the upper conductive strip and the lower conductive strip that are facing each other are directly connected or indirectly connected. The second end of the upper conductive strip and / or the second end of the lower conductive strip are provided with a fourth lead extending away from the battery cell. The upper conductive strip and the lower conductive strip are flush with the side facing the battery cell.
[0010] As an alternative, both the second end of the upper conductive strip and the second end of the lower conductive strip are provided with the fourth lead wire, and the two fourth lead wires are attached and connected on opposite sides; or the two fourth lead wires are spaced apart and connected through a photovoltaic junction box.
[0011] As an alternative, one of the upper conductive strip and the lower conductive strip is provided with the fourth lead, and the second end of the upper conductive strip or the lower conductive strip with the fourth lead is provided with a first bend that is bent away from the battery cell. The fourth lead is provided on the first bend, and the side of the first bend facing the battery cell forms a mounting groove. The second end of the other of the upper conductive strip or the lower conductive strip is provided in the mounting groove.
[0012] As an alternative, the length of the mounting groove along the length direction of the first conductive strip is 3mm-12mm.
[0013] As an optional solution, the photovoltaic module further includes a third central busbar and a second central busbar connecting the upper battery module and the lower battery module, and the third central busbar and the second central busbar are respectively provided with a third lead and a second lead distributed in parallel to each other at their opposite ends;
[0014] The fourth lead is disposed between the third lead and the second lead, and the fourth lead is perpendicular to both the third lead and the second lead.
[0015] Photovoltaic modules, including:
[0016] The battery unit includes an upper battery module and a lower battery module;
[0017] The upper end busbar is connected to the upper end of the upper battery module;
[0018] The lower end busbar is connected to the lower end of the lower battery module;
[0019] A first conductive strip, the two ends of which are respectively connected to the upper end busbar and the lower end busbar, and a fifth lead wire is provided on the side of the first conductive strip away from the battery cell, the width of the fifth lead wire being smaller than the width of the first conductive strip.
[0020] As an optional solution, the photovoltaic module further includes a third central busbar and a second central busbar connecting the upper battery module and the lower battery module, and the third central busbar and the second central busbar are respectively provided with a third lead and a second lead distributed in parallel to each other at their opposite ends;
[0021] The fifth lead is disposed between the third lead and the second lead. The fifth lead includes a connecting portion and a lead portion that are perpendicularly distributed to each other. The connecting portion is connected to the first conductive strip, and the lead portion is parallel to both the third lead and the second lead.
[0022] As an alternative, the thickness of the fifth lead is greater than the thickness of the first conductive strip.
[0023] As an optional feature, the photovoltaic module further includes:
[0024] The second central busbar connects the upper battery module and the lower battery module;
[0025] The second conductive strip has its two ends connected to the upper busbar and the lower busbar, respectively, and the second conductive strip has a first groove with an opening facing the battery cell, and the second middle busbar portion is partially confined within the first groove.
[0026] As an alternative, at least one end of the first conductive strip and the second conductive strip is provided with a second bend. The second bend includes an extension and a connecting end that are perpendicularly distributed to each other. The extension is perpendicularly disposed on the corresponding first conductive strip or second conductive strip and extends toward the battery cell. The connecting end is disposed at the end of the extension that faces the battery cell and extends along the length direction of the first conductive strip.
[0027] The beneficial effects of this utility model are:
[0028] The photovoltaic module provided by this utility model sets the first conductive strip as an upper conductive strip and a lower conductive strip that are connected to each other. When the upper conductive strip and the lower conductive strip are connected, the sides of the upper conductive strip and the lower conductive strip facing the battery cell are set to be flush. This avoids the height difference between the upper conductive strip and the lower conductive strip, thereby avoiding the generation of gaps, reducing the generation of air bubbles in the battery cell, and improving the safety and reliability of the electrical connection. Attached Figure Description
[0029] Figure 1 These are schematic diagrams of the photovoltaic modules described in Embodiments 1 and 2 of this utility model;
[0030] Figure 2 This is a schematic diagram of the first connection structure of the upper conductive strip and the lower conductive strip according to Embodiment 1 of this utility model;
[0031] Figure 3 This is a schematic diagram of the second connection structure of the upper conductive strip and the lower conductive strip according to Embodiment 1 of this utility model;
[0032] Figure 4 This is a schematic diagram of the lower conductive strip according to Embodiment 1 of this utility model;
[0033] Figure 5 This is a schematic diagram of the connection structure of the second conductive strip and the second middle busbar involved in Embodiments 1 and 2 of this utility model;
[0034] Figure 6 This is a schematic diagram of the first structure of the second conductive strip involved in Embodiments 1 and 2 of this utility model;
[0035] Figure 7 This is a schematic diagram of the structure of the second bend of the first conductive strip involved in Embodiments 1 and 2 of this utility model;
[0036] Figure 8 This is a schematic diagram of the third connection structure of the upper conductive strip and the lower conductive strip according to Embodiment 1 of this utility model;
[0037] Figure 9 This is a schematic diagram of the structure of the first conductive strip and the fifth lead wire involved in Embodiment 2 of this utility model;
[0038] Figure 10 This is a schematic diagram of the second structure of the second conductive strip involved in Embodiment 1 and Embodiment 2 of this utility model;
[0039] Figure 11 This is a schematic diagram of the third structure of the second conductive strip involved in Embodiment 1 and Embodiment 2 of this utility model.
[0040] In the picture:
[0041] 1. Battery cell; 11. Upper battery module; 111. First upper battery string group; 112. Second upper battery string group; 113. Third upper battery string group; 12. Lower battery module; 121. First lower battery string group; 122. Second lower battery string group; 123. Third lower battery string group;
[0042] 2. Upper busbar; 21. First upper busbar; 22. Second upper busbar;
[0043] 3. Lower busbar; 31. First lower busbar; 32. Second lower busbar;
[0044] 4. Second conductive strip; 41. First groove; 42. Z-shaped lead wire;
[0045] 5. First central busbar; 51. First lead-out line;
[0046] 6. Second central busbar; 61. Second lead-out line;
[0047] 7. Third central busbar; 71. Third lead-out line;
[0048] 8. First conductive strip; 81. Upper conductive strip; 82. Lower conductive strip; 821. Fourth lead wire; 822. First bend; 8221. Mounting groove; 83. Second bend; 831. Extension; 832. Connecting end; 84. Fifth lead wire; 841. Connecting part; 842. Lead wire part;
[0049] 9. Insulating film. Detailed Implementation
[0050] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar parts or parts having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.
[0051] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0052] In the description of this utility model, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0053] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.
[0054] Example 1
[0055] like Figures 1-8 As shown, this utility model provides a photovoltaic module, which includes a battery cell 1, an upper busbar 2, a lower busbar 3, and a first conductive strip 8.
[0056] Battery unit 1 includes an upper battery module 11 and a lower battery module 12. An upper busbar 2 is connected to the upper end of the upper battery module 11, and a lower busbar 3 is connected to the lower end of the lower battery module 12. A first conductive strip 8 includes an upper conductive strip 81 and a lower conductive strip 82. The first ends of the upper conductive strip 81 and the lower conductive strip 82, facing away from each other, are connected to the upper busbar 2 and the lower busbar 3, respectively. The second ends of the upper conductive strip 81 and the lower conductive strip 82, facing each other, are connected to each other. A fourth lead 821 extending away from battery unit 1 is provided at the second end of the upper conductive strip 81 and / or the second end of the lower conductive strip 82. After the second ends of the upper conductive strip 81 and the lower conductive strip 82 are connected to each other, the upper conductive strip 81 and the lower conductive strip 82 are flush with the sides of battery unit 1.
[0057] The photovoltaic module sets the first conductive strip 8 as an upper conductive strip 81 and a lower conductive strip 82 that are connected to each other. When the upper conductive strip 81 and the lower conductive strip 82 are connected, the sides of the upper conductive strip 81 and the lower conductive strip 82 facing the battery cell 1 are set to be flush. This avoids the height difference between the upper conductive strip 81 and the lower conductive strip 82, thereby avoiding the generation of gaps, reducing the generation of air bubbles in the battery cell 1, and improving the safety and reliability of the electrical connection.
[0058] In this embodiment, the upper battery module 11 includes a first upper battery string group 111, a second upper battery string group 112, and a third upper battery string group 113. The lower battery module 12 includes a first lower battery string group 121, a second lower battery string group 122, and a third lower battery string group 123. The upper busbar 2 includes a first upper busbar 21 and a second upper busbar 22. The lower busbar 3 includes a first lower busbar 31 and a second lower busbar 32. Two battery strings in the first upper battery string group 111 are connected in series through the first upper busbar 21. Two battery strings in the first lower battery string group 121 are connected in series through the first lower busbar 31. The second upper battery string group 112 and the third upper battery string group 113 are connected in series through the second upper busbar 22. The second lower battery string group 122 and the third lower battery string group 123 are connected in series through the second lower busbar 32.
[0059] The photovoltaic module also includes a first central busbar 5, a second central busbar 6, and a third central busbar 7. The first upper battery string group 111 and the first lower battery string group 121 are connected in parallel through the first central busbar 5. The second upper battery string group 112 and the second lower battery string group 122 are connected in parallel through the second central busbar 6. The third upper battery string group 113 and the third lower battery string group 123 are connected in parallel through the third central busbar 7. The first central busbar 5 and the second central busbar 6 are respectively provided with a first lead 51 and a second lead 61 that are parallel to each other at their opposite ends. The other end of the second central busbar 6 is also provided with a second lead 61. The third central busbar 7 is provided with a third lead 71 at its end facing the second central busbar 6. The first lead 51, the second lead 61, and the third lead 71 are all used to connect to the photovoltaic junction box. Furthermore, the first central busbar 5 and the first lead-out line 51 are integral structures, that is, the first lead-out line 51 is formed by bending the first central busbar 5; the second central busbar 6 and the second lead-out line 61 are integral structures, that is, the second lead-out line 61 is formed by bending the second central busbar 6; the third central busbar 7 and the third lead-out line 71 are integral structures, that is, the third lead-out line 71 is formed by bending the third central busbar 7.
[0060] Optionally, such as Figure 2 As shown, the upper conductive strip 81 and the lower conductive strip 82 each have a fourth lead 821 at their opposite second ends, and the two fourth leads 821 are directly connected (can be welded) to each other on opposite sides, so that the upper conductive strip 81 and the lower conductive strip 82 form a U-shape. In this U-shaped structure, the upper conductive strip 81 and the lower conductive strip 82 have the same structure, and the fourth lead 821 on the upper conductive strip 81 is perpendicular to the upper conductive strip 81, and the fourth lead 821 on the lower conductive strip 82 is perpendicular to the lower conductive strip 82. The processing is relatively simple, and after the upper conductive strip 81 and the lower conductive strip 82 are connected, it can be ensured that the upper conductive strip 81 and the lower conductive strip 82 are flush with the side facing the battery cell 1. Specifically, the fourth leads 821 on the upper conductive strip 81 and the lower conductive strip 82 are both formed by bending. Furthermore, by welding the two fourth leads 821 together, the welding area is made perpendicular to the thickness direction of the battery cell 1, and the welding area is not on the same plane as the battery cell 1, which can prevent the welding process from putting pressure on the battery cell 1.
[0061] like Figure 8 As shown, the two fourth leads 821 can also be set at intervals. When the two fourth leads 821 are set at intervals, they can simultaneously extend into the photovoltaic junction box and be indirectly connected through the connectors in the photovoltaic junction box to achieve circuit conduction.
[0062] Optionally, such as Figures 3-4As shown, only one of the upper conductive strip 81 and the lower conductive strip 82 may be provided with a fourth lead 821. For example, the lower conductive strip 82 is provided with a fourth lead 821, and the second end of the lower conductive strip 82 is provided with a first bend 822 that bends away from the battery cell 1. The fourth lead 821 is provided on the first bend 822. The side of the first bend 822 facing the battery cell 1 forms a mounting groove 8221. The depth of the mounting groove 8221 along the thickness direction of the first conductive strip 82 is the same as the thickness of the upper conductive strip 81. The second end of the upper conductive strip 81 is provided in the mounting groove 8221. Within 221, the upper conductive strip 81 and the lower conductive strip 82 can be connected by welding. By placing the upper conductive strip 81 within the mounting groove 8221, after the upper conductive strip 81 and the lower conductive strip 82 are connected, they are flush with the side of the battery cell 1, avoiding the problem of air bubbles not being completely discharged due to the height difference between the upper conductive strip 81 and the lower conductive strip 82, thus improving the reliability of the electrical connection. This structural design also allows for deformation space to accommodate thermal expansion and contraction during the manufacturing and actual operation of the photovoltaic module. Furthermore, the lower conductive strip 82 is an integral structure, formed by bending to form a first bend 822, which is then bent again to form a fourth lead 821. Alternatively, the upper conductive strip 81 can have a first bend 822 and a fourth lead 821, with the same structure as described above, which will not be repeated here.
[0063] Optionally, the length of the mounting groove 8221 along the length direction of the first conductive strip 8 is 3mm-12mm, that is, the length of the overlapping part of the upper conductive strip 81 and the lower conductive strip 82 is 3mm-12mm, so as to ensure the connection between the upper conductive strip 81 and the lower conductive strip 82.
[0064] In this embodiment, the fourth lead 821 is located between the third lead 71 and the second lead 61, and the fourth lead 821 is vertically distributed between the third lead 71 and the second lead 61. By setting the fourth lead 821 between the third lead 71 and the second lead 61, the third lead 71 and the second lead 61 can limit the first conductive strip 8 to prevent the first conductive strip 8 from swaying.
[0065] In this embodiment, as Figures 5-6 and combined Figure 1As shown, the photovoltaic module also includes a second conductive strip 4. The two ends of the second conductive strip 4 are connected to the first upper busbar 21 and the first lower busbar 31, respectively. Simultaneously, the second conductive strip 4 is welded to the second middle busbar 6. To avoid a height difference between the second conductive strip 4 and the second middle busbar 6, the second conductive strip 4 is provided with a first groove 41 opening towards the battery cell 1. The first groove 41 can be formed by bending the second conductive strip 4. The second middle busbar 6 and the second conductive strip 4 are vertically distributed, and the portion of the second middle busbar 6 connected to the second conductive strip 4 is confined within the first groove 41, so that the second conductive strip 4 and the second middle busbar 6 are flush with the side facing the battery cell 1. By providing the first groove 41 on the second conductive strip 4 and confining the second middle busbar 6 within the first groove 41, the contact between the second conductive strip 4 and the second middle busbar 6 is tighter, and a height difference between the second conductive strip 4 and the second middle busbar 6 is avoided, preventing air bubble problems and improving the reliability of the electrical connection.
[0066] like Figures 10-11 As shown, the second conductive strip 4 can also be configured in a U-shape. The end of the second central busbar 6 near the first central busbar 5 may not have a second lead 61. The U-shaped lead 42 of the second conductive strip 4 is soldered to the end of the second central busbar 6 facing the first central busbar 5, or the second central busbar 6 is soldered to the second conductive strip 4, so that the U-shaped lead 42 of the second conductive strip 4 replaces the second lead 61 of the second central busbar 6. Further, when the second conductive strip 4 is soldered to the second central busbar 6, the second conductive strip 4 can be bent to form a second groove, and the second central busbar 6 is disposed within the second groove, so that the second central busbar 6 and the second conductive strip 4 are flush. When the second central busbar 6 is soldered to the second conductive strip 4, the second central busbar 6 can be bent to form a third groove, and the second conductive strip 4 is disposed within the third groove, so that the second central busbar 6 and the second conductive strip 4 are flush.
[0067] Optionally, such as Figure 7As shown, both ends of the first conductive strip 8 (i.e., the first ends of the upper conductive strip 81 and the lower conductive strip 82) are provided with second bending portions 83. The second bending portions 83 include mutually perpendicularly distributed extension portions 831 and connecting ends 832. The extension portions 831 are vertically disposed on the first conductive strip 8 and extend toward the battery cell 1. The connecting ends 832 are disposed at the end of the extension portions 831 near the battery cell 1 and extend along the length direction of the first conductive strip 8. The connecting ends 832 at both ends of the first conductive strip 8 are respectively connected to the second upper busbar 22 and the second lower busbar 32. This structure creates a height difference between the connecting ends 832 and the first conductive strip 8. The height difference range can be set to 0.2mm-0.35mm, which can effectively reduce the pressure of the first conductive strip 8 on the battery string during the lamination process and reduce the probability of the battery string cracking.
[0068] The second conductive strip 4 also has a second bend 83 at both ends. The connecting ends 832 at both ends of the second conductive strip 4 are connected to the first upper busbar 21 and the first lower busbar 31, respectively. This structure creates a height difference between the connecting ends 832 and the second conductive strip 4. The height difference can be set to 0.2mm-0.35mm, which can effectively reduce the pressure of the second conductive strip 4 on the battery string during the lamination process and reduce the probability of the battery string cracking.
[0069] In this embodiment, the width of the first conductive strip 8 and the second conductive strip 4 can be set to 4mm-12mm, and the thickness can be set to 0.1mm-0.3mm. Both the first conductive strip 8 and the second conductive strip 4 include a metal base and a welding layer. The metal base has a polygonal, waist-shaped, or elliptical cross-section, and its surface can be flat or uneven, which can increase light reflection and improve power. The welding layer is disposed on the surface of the metal base. Adding the welding layer makes the surfaces of the first conductive strip 8 and the second conductive strip 4 flat, ensuring effective welding while reducing the resistance of the first conductive strip 8 and the second conductive strip 4, thus increasing power.
[0070] Optionally, the connecting ends 832 of the first conductive strip 8 and the second conductive strip 4 can be flattened and shaped so that the total thickness of the connecting ends 832 of the first conductive strip 8 after welding, together with the second upper busbar 22 and the second lower busbar 32, is 0.3mm-0.5mm, and the total thickness of the connecting ends 832 of the second conductive strip 4 after welding, together with the first upper busbar 21 and the first lower busbar 31, is 0.3mm-0.5mm. Furthermore, the portion where the second conductive strip 4 connects to the second middle busbar 6 is flattened and shaped so that the total thickness of the second conductive strip 4 and the second middle busbar 6 after welding is 0.3mm-0.5mm.
[0071] In this embodiment, refer again Figure 1As shown, insulating films 9 are provided between the upper conductive strip 81 and the battery unit 1, between the lower conductive strip 82 and the battery unit 1, and between the second conductive strip 4 and the battery unit 1. The width of the insulating film 9 is greater than or equal to the width of the corresponding first conductive strip 8 and the second conductive strip 4, and the length of the insulating film 9 is less than the length of the corresponding first conductive strip 8 and the second conductive strip 4.
[0072] Example 2
[0073] like Figure 1 and Figure 8 As shown, the photovoltaic module provided in this embodiment includes a battery cell 1, an upper busbar 2, a lower busbar 3, and a first conductive strip 4.
[0074] The battery unit 1 includes an upper battery module 11 and a lower battery module 12. The upper end busbar 2 is connected to the upper end of the upper battery module 11, and the lower end busbar 3 is connected to the lower end of the lower battery module 12. The two ends of the first conductive strip 4 are respectively connected to the upper end busbar 2 and the lower end busbar 3, and a fifth lead wire 84 is provided on the side of the first conductive strip 8 away from the battery unit 1. The width of the fifth lead wire 84 is smaller than the width of the first conductive strip 8.
[0075] In this photovoltaic module, the first conductive strip 8 is an integral structure, ensuring no height difference on the side of the first conductive strip 8 facing the battery cell 1, reducing the generation of air bubbles and improving the reliability of the electrical connection. Furthermore, a fifth lead 84 with a different specification than the first conductive strip 8 is provided on the first conductive strip 8 (it can be soldered). Specifically, the width of the fifth lead 84 is set to be smaller than the width of the first conductive strip 8. This reduces the size of the connecting hole on the photovoltaic junction box that connects to the fifth lead 84, decreasing the probability of moisture entering the photovoltaic junction box through the connecting hole and improving the reliability of the electrical connection. The smaller width of the fifth lead 84 also makes it easier for it to enter the connecting hole, improving process convenience. It is understood that in this embodiment, the first conductive strip 8 and the fifth lead 84 are separate structures.
[0076] In this embodiment, the upper battery module 11 includes a first upper battery string group 111, a second upper battery string group 112, and a third upper battery string group 113. The lower battery module 12 includes a first lower battery string group 121, a second lower battery string group 122, and a third lower battery string group 123. The upper busbar 2 includes a first upper busbar 21 and a second upper busbar 22. The lower busbar 3 includes a first lower busbar 31 and a second lower busbar 32. Two battery strings in the first upper battery string group 111 are connected in series through the first upper busbar 21. Two battery strings in the first lower battery string group 121 are connected in series through the first lower busbar 31. The second upper battery string group 112 and the third upper battery string group 113 are connected in series through the second upper busbar 22. The second lower battery string group 122 and the third lower battery string group 123 are connected in series through the second lower busbar 32.
[0077] The photovoltaic module also includes a first central busbar 5, a second central busbar 6, and a third central busbar 7. The first upper battery string group 111 and the first lower battery string group 121 are connected in parallel through the first central busbar 5. The second upper battery string group 112 and the second lower battery string group 122 are connected in parallel through the second central busbar 6. The third upper battery string group 113 and the third lower battery string group 123 are connected in parallel through the third central busbar 7. The first central busbar 5 and the second central busbar 6 are respectively provided with a first lead 51 and a second lead 61 that are parallel to each other at their opposite ends. The other end of the second central busbar 6 is also provided with a second lead 61. The third central busbar 7 is provided with a third lead 71 at its end facing the second central busbar 6. The first lead 51, the second lead 61, and the third lead 71 are all used to connect to the photovoltaic junction box. Furthermore, the first central busbar 5 and the first lead-out line 51 are integral structures, that is, the first lead-out line 51 is formed by bending the first central busbar 5; the second central busbar 6 and the second lead-out line 61 are integral structures, that is, the second lead-out line 61 is formed by bending the second central busbar 6; the third central busbar 7 and the third lead-out line 71 are integral structures, that is, the third lead-out line 71 is formed by bending the third central busbar 7.
[0078] Optionally, the fifth lead 84 is located between the third lead 71 and the second lead 61. The fifth lead 84 includes a connecting part 841 and a lead part 842 that are perpendicularly distributed to each other. The connecting part 841 is connected to the first conductive strip 8. The lead part 842 is parallel to both the third lead 71 and the second lead 61. By setting the lead part 842, the second lead 61 and the third lead 71 to be distributed in a parallel manner, three connecting holes corresponding to the lead part 842, the second lead 61 and the third lead 71 can be provided on the photovoltaic junction box. The three connecting holes can be designed according to the corresponding lead part 842, the second lead 61 and the third lead 71, which can effectively control the size of the connecting holes and reduce the risk of water vapor passing through the connecting holes.
[0079] Optionally, the thickness of the fifth lead 84 is greater than the thickness of the first conductive strip 8. By appropriately increasing the thickness of the fifth lead 84, the structural strength of the fifth lead 84 can be enhanced, and the connection firmness of the fifth lead 84 can be improved.
[0080] Of course, the lead portion 842 can also be perpendicular to both the third lead 71 and the second lead 61.
[0081] In this embodiment, as Figures 5-6 and combined Figure 1 As shown, the photovoltaic module also includes a second conductive strip 4. The two ends of the second conductive strip 4 are connected to the first upper busbar 21 and the first lower busbar 31, respectively. Simultaneously, the second conductive strip 4 is welded to the second middle busbar 6. To avoid a height difference between the second conductive strip 4 and the second middle busbar 6, the second conductive strip 4 is provided with a first groove 41 opening towards the battery cell 1. The first groove 41 can be formed by bending the second conductive strip 4. The second middle busbar 6 and the second conductive strip 4 are vertically distributed, and the portion of the second middle busbar 6 connected to the second conductive strip 4 is confined within the first groove 41, so that the second conductive strip 4 and the second middle busbar 6 are flush with the side facing the battery cell 1. By providing the first groove 41 on the second conductive strip 4 and confining the second middle busbar 6 within the first groove 41, the contact between the second conductive strip 4 and the second middle busbar 6 is tighter, and a height difference between the second conductive strip 4 and the second middle busbar 6 is avoided, preventing air bubble problems and improving the reliability of the electrical connection.
[0082] like Figures 10-11 As shown, the second conductive strip 4 can also be configured in a U-shape. The end of the second central busbar 6 near the first central busbar 5 may not have a second lead 61. The U-shaped lead 42 of the second conductive strip 4 is soldered to the end of the second central busbar 6 facing the first central busbar 5, or the second central busbar 6 is soldered to the second conductive strip 4, so that the U-shaped lead 42 of the second conductive strip 4 replaces the second lead 61 of the second central busbar 6. Further, when the second conductive strip 4 is soldered to the second central busbar 6, the second conductive strip 4 can be bent to form a second groove, and the second central busbar 6 is disposed within the second groove, so that the second central busbar 6 and the second conductive strip 4 are flush. When the second central busbar 6 is soldered to the second conductive strip 4, the second central busbar 6 can be bent to form a third groove, and the second conductive strip 4 is disposed within the third groove, so that the second central busbar 6 and the second conductive strip 4 are flush.
[0083] Optionally, such as Figure 7As shown, both ends of the first conductive strip 8 are provided with second bending portions 83. The second bending portion 83 includes mutually perpendicularly distributed extension portions 831 and connecting ends 832. The extension portions 831 are vertically disposed on the first conductive strip 8 and extend toward the battery cell 1. The connecting ends 832 are disposed at one end of the extension portions 831 facing the battery cell 1 and extend along the length direction of the first conductive strip 8. The connecting ends 832 at both ends of the first conductive strip 8 are respectively connected to the second upper busbar 22 and the second lower busbar 32. This structure creates a height difference between the connecting ends 832 and the first conductive strip 8. The height difference range can be set to 0.2mm-0.35mm, which can effectively reduce the pressure of the first conductive strip 8 on the battery string during the lamination process and reduce the probability of the battery string cracking.
[0084] The second conductive strip 4 also has a second bend 83 at both ends. The connecting ends 832 at both ends of the second conductive strip 4 are connected to the first upper busbar 21 and the first lower busbar 31, respectively. This structure creates a height difference between the connecting ends 832 and the second conductive strip 4. The height difference can be set to 0.2mm-0.35mm, which can effectively reduce the pressure of the second conductive strip 4 on the battery string during the lamination process and reduce the probability of the battery string cracking.
[0085] In this embodiment, the width of the first conductive strip 8 and the second conductive strip 4 can be set to 4mm-12mm, and the thickness can be set to 0.1mm-0.3mm. Both the first conductive strip 8 and the second conductive strip 4 include a metal base and a welding layer. The metal base has a polygonal, waist-shaped, or elliptical cross-section, and its surface can be flat or uneven, which can increase light reflection and improve power. The welding layer is disposed on the surface of the metal base. Adding the welding layer makes the surfaces of the first conductive strip 8 and the second conductive strip 4 flat, ensuring effective welding while reducing the resistance of the first conductive strip 8 and the second conductive strip 4, thus increasing power.
[0086] Optionally, the connecting ends 832 of the first conductive strip 8 and the second conductive strip 4 can be flattened and shaped so that the total thickness of the connecting ends 832 of the first conductive strip 8 after welding, together with the second upper busbar 22 and the second lower busbar 32, is 0.3mm-0.5mm, and the total thickness of the connecting ends 832 of the second conductive strip 4 after welding, together with the first upper busbar 21 and the first lower busbar 31, is 0.3mm-0.5mm. Furthermore, the portion where the second conductive strip 4 connects to the second middle busbar 6 is flattened and shaped so that the total thickness of the second conductive strip 4 and the second middle busbar 6 after welding is 0.3mm-0.5mm.
[0087] In this embodiment, refer again Figure 1As shown, an insulating film 9 is provided between the first conductive strip 8 and the battery cell 1, and between the second conductive strip 4 and the battery cell 1. The width of the insulating film 9 is greater than or equal to the width of the corresponding first conductive strip 8 and the second conductive strip 4, and the length of the insulating film 9 is less than the length of the corresponding first conductive strip 8 and the second conductive strip 4.
[0088] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A photovoltaic module, characterized in that, include: The battery unit (1) includes an upper battery module (11) and a lower battery module (12); The upper end busbar (2) is connected to the upper end of the upper battery module (11); The lower end busbar (3) is connected to the lower end of the lower battery module (12); The first conductive strip (8) includes an upper conductive strip (81) and a lower conductive strip (82). The first ends of the upper conductive strip (81) and the lower conductive strip (82) facing away from each other are respectively connected to the upper end busbar (2) and the lower end busbar (3). The second ends of the upper conductive strip (81) and the lower conductive strip (82) facing each other are directly connected or indirectly connected. The second end of the upper conductive strip (81) and / or the second end of the lower conductive strip (82) are provided with a fourth lead (821) extending away from the battery cell (1). The upper conductive strip (81) and the lower conductive strip (82) are flush with the side of the battery cell (1).
2. The photovoltaic module according to claim 1, characterized in that, The second end of the upper conductive strip (81) and the second end of the lower conductive strip (82) are both provided with the fourth lead (821), and the two fourth lead (821) are attached and connected on opposite sides; or the two fourth lead (821) are distributed at intervals and connected through a photovoltaic junction box.
3. The photovoltaic module according to claim 1, characterized in that, One of the upper conductive strip (81) and the lower conductive strip (82) is provided with the fourth lead wire (821), and the second end of the upper conductive strip (81) or the lower conductive strip (82) where the fourth lead wire (821) is provided is provided with a first bend (822) that bends away from the battery cell (1). The fourth lead wire (821) is provided on the first bend (822). The side of the first bend (822) facing the battery cell (1) forms a mounting groove (8221). The second end of the other of the upper conductive strip (81) or the lower conductive strip (82) is provided in the mounting groove (8221).
4. The photovoltaic module according to claim 3, characterized in that, The length of the mounting groove (8221) along the length direction of the first conductive strip (8) is 3mm-12mm.
5. The photovoltaic module according to claim 1, characterized in that, The photovoltaic module also includes a third middle busbar (7) and a second middle busbar (6) connecting the upper battery module (11) and the lower battery module (12), and the third middle busbar (7) and the second middle busbar (6) are respectively provided with a third lead (71) and a second lead (61) that are parallel to each other at their opposite ends; The fourth lead (821) is disposed between the third lead (71) and the second lead (61), and the fourth lead (821) is perpendicular to both the third lead (71) and the second lead (61).
6. A photovoltaic module, characterized in that, include: The battery unit (1) includes an upper battery module (11) and a lower battery module (12); The upper end busbar (2) is connected to the upper end of the upper battery module (11); The lower end busbar (3) is connected to the lower end of the lower battery module (12); The first conductive strip (8) has two ends connected to the upper end busbar (2) and the lower end busbar (3) respectively, and a fifth lead (84) is provided on the side of the first conductive strip (8) away from the battery cell (1), and the width of the fifth lead (84) is smaller than the width of the first conductive strip (8).
7. The photovoltaic module according to claim 6, characterized in that, The photovoltaic module also includes a third middle busbar (7) and a second middle busbar (6) connecting the upper battery module (11) and the lower battery module (12), and the third middle busbar (7) and the second middle busbar (6) are respectively provided with a third lead (71) and a second lead (61) that are parallel to each other at their opposite ends; The fifth lead (84) is disposed between the third lead (71) and the second lead (61). The fifth lead (84) includes a connecting part (841) and a lead part (842) that are perpendicularly distributed to each other. The connecting part (841) is connected to the first conductive strip (8), and the lead part (842) is parallel to both the third lead (71) and the second lead (61).
8. The photovoltaic module according to claim 6, characterized in that, The thickness of the fifth lead (84) is greater than the thickness of the first conductive strip (8).
9. The photovoltaic module according to claim 1 or the photovoltaic module according to claim 6, characterized in that, The photovoltaic module also includes: The second central busbar (6) connects the upper battery module (11) and the lower battery module (12); The second conductive strip (4) is connected to the upper end busbar (2) and the lower end busbar (3) at both ends, and the second conductive strip (4) is provided with a first groove (41) with an opening facing the battery unit (1), and the second middle busbar (6) is partially confined within the first groove (41).
10. The photovoltaic module according to claim 9, characterized in that, At least one end of the first conductive strip (8) and the second conductive strip (4) is provided with a second bending portion (83). The second bending portion (83) includes an extension portion (831) and a connecting end portion (832) that are perpendicularly distributed to each other. The extension portion (831) is perpendicularly disposed on the corresponding first conductive strip (8) or second conductive strip (4) and extends toward the battery cell (1). The connecting end portion (832) is disposed at one end of the extension portion (831) toward the battery cell (1) and extends along the length direction of the first conductive strip (8).