A solar cell module

Abstract

The utility model relates to the technical field of solar energy, disclose a solar cell module. Including the cell piece layer, wiring structure and a plurality of bypass diode, the cell piece layer includes a plurality of cell string group, oppositely arranged light receiving surface and back light surface, and there is clearance space between adjacent cell string group, wiring structure sets up in clearance space, series or parallel cell string group, a plurality of bypass diodes are arranged on wiring structure, respectively parallel a plurality of cell string group, and wiring structure has the connecting end that is bent and protruding from the surface of cell piece layer towards the back light surface side in the end part with bypass diode connection. The connecting portion protrudes from the plane where the cell piece layer or the wiring structure itself is located, provides good connection positioning, reduces the connection difficulty with the bypass diode, avoids the damage of the same plane welding to the cell piece layer and the connection failure caused by directly burning the wiring structure, increases the process fault tolerance and the connection reliability, effectively guarantees the power generation performance of solar cell module.

Description

Technical Field

[0001] This utility model relates to the field of solar energy technology, specifically to a solar cell module. Background Technology

[0002] Solar photovoltaic (PV) modules are the core and most important component of a solar power system. Their function is to convert solar energy into electrical energy, which is then stored in batteries or used to power loads. With the continuous development of solar cell technology, slab-cell technology has gained increasing attention. Slab-cell technology involves cutting standard solar cells into multiple smaller pieces (such as half-cells, 1 / 3-cells, or smaller), and then reconnecting them in series or parallel to reduce resistance losses, minimize hot spots, and improve module efficiency. Correspondingly, slab-cell technology should also refine its circuit layout and process control to pursue improved module performance.

[0003] In related technologies, when forming photovoltaic modules, bypass diodes are typically integrated into the junction box. These bypass diodes are connected in series and parallel with the photovoltaic module's cells. This way, when a local cell is damaged or shaded, the bypass diodes can provide an alternative current path, preventing damage to the shaded area due to overheating caused by reverse current. This ensures that the unshaded cells can still generate electricity normally, reducing power loss. However, because the current path of the cells is shortened after segmentation, the current distribution uniformity is poor, and the mechanical strength of the cells is reduced, the welding process for connecting bypass diodes in photovoltaic modules based on segmented cell technology is more difficult. This can easily lead to stress concentration, micro-displacement, and other issues, thus affecting the photoelectric conversion efficiency of the cell layers and ultimately the power generation efficiency of the solar module. Utility Model Content

[0004] In view of this, the present invention provides a solar cell module to solve the problem that the welding process is difficult when setting bypass diodes on the cell layers composed of segmented cells, which can easily affect the power generation performance of the cell module.

[0005] In a first aspect, this utility model provides a solar cell module, comprising: a cell layer, a wiring structure, and a plurality of bypass diodes. The cell layer includes a plurality of cell strings, with gaps between adjacent cell strings. The cell layer has a light-receiving surface and a backlight surface arranged opposite to each other. The wiring structure is disposed in the gaps and is suitable for connecting the cell strings in series or in parallel. The plurality of bypass diodes are disposed on the wiring structure to connect the plurality of cell strings in parallel respectively. At the end of the wiring structure connected to the bypass diodes, there is a connecting end that bends and protrudes from the surface of the cell layer toward the backlight surface.

[0006] In one optional embodiment, the battery cell layer includes at least two battery arrays spaced apart along a second direction, with bypass diodes disposed between adjacent battery arrays; each battery array includes multiple battery string groups arranged along a first direction, the first direction and the second direction forming a preset angle, and the multiple battery string groups are connected in series through a wiring structure; each battery string group includes multiple battery strings arranged in parallel; each battery string includes multiple battery segments arranged in series.

[0007] In one alternative implementation, the wiring structure includes:

[0008] A first wire extends along a first direction and is disposed in the gap space beside the battery string;

[0009] The second conductor extends along the second direction and is disposed in the gap space between adjacent battery strings.

[0010] In one alternative embodiment, the system further includes: multiple junction boxes disposed between the battery arrays on one side of the backlight surface, suitable for connecting the battery cell layer to external circuitry; and bypass diodes integrated into the junction boxes.

[0011] In one alternative embodiment, the junction box includes: a first junction box having a first bypass diode and a second bypass diode, the first bypass diode and the second bypass diode being disposed in the intersection area of ​​the first conductor and the second conductor, and adapted to be connected in parallel with battery strings located on both sides of the intersection area in a first direction, respectively.

[0012] The first conductor has two first connecting ends spaced apart along a first direction in the intersection area, and the second conductor has two second connecting ends spaced apart along a second direction, or the second conductor has a second connecting end between the two first connecting ends.

[0013] In one optional embodiment, the junction box further includes: a second junction box having a third bypass diode, wherein the intersection area of ​​the third bypass diode and the first conductor and the second conductor is staggered, and is suitable for parallel connection with a battery string located next to the third bypass diode in the second direction; the first conductor includes two first connection terminals spaced apart along the first direction.

[0014] In one alternative embodiment, the device further includes an insulating layer disposed between the battery cell layer and the second conductor to isolate the second conductor from the battery cell layer.

[0015] In one optional embodiment, the width of the second conductor ranges from 2 mm to 3 mm; the width of the insulation layer ranges from 6 mm to 10 mm.

[0016] In one optional embodiment, it further includes: a first protective layer disposed on the light-receiving surface of the battery cell layer; and a second protective layer disposed on the backlight surface of the battery cell layer and located between the battery cell layer and the insulating layer.

[0017] In one optional embodiment, the thickness of the first protective layer and the second protective layer ranges from 50 μm to 150 μm.

[0018] The beneficial effects of this utility model are as follows: This utility model sets the end of the wiring structure and the bypass diode that needs to be fixed as a bent connection part. The connection part that protrudes from the plane of the cell layer or the wiring structure itself provides good connection positioning, which greatly reduces the difficulty of connecting with the bypass diode. At the same time, it avoids damage to the cell layer caused by welding in the same plane, and also avoids connection failure caused by directly burning off the wiring structure due to process precision issues. The process fault tolerance and the connection reliability between the bypass diode and the wiring structure are greatly increased, effectively ensuring the power generation performance of the solar cell module. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of one side of the back surface of the solar cell module according to an embodiment of the present invention;

[0021] Figure 2 This is a circuit diagram of a solar cell module according to an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the wiring structure with four outgoing lines in an embodiment of this utility model;

[0023] Figure 4 This is a schematic diagram of the wiring structure with three outgoing lines in an embodiment of this utility model;

[0024] Figure 5 This is a schematic diagram of the battery string structure in an embodiment of this utility model;

[0025] Figure 6 This is a schematic diagram of the battery string assembly in an embodiment of this utility model;

[0026] Figure 7 This is a schematic diagram of the structure of the battery cell layer in an embodiment of this utility model;

[0027] Figure 8 This is a schematic diagram of the circuit connection of each battery string group of the solar cell module when it is working normally in an embodiment of this utility model;

[0028] Figure 9 This is a schematic diagram of the circuit connection when the battery string on the left side of the solar cell module fails in an embodiment of this utility model;

[0029] Figure 10 This is a circuit connection diagram of the solar cell module in the embodiment of this utility model when the battery string in the middle fails;

[0030] Figure 11 This is a schematic diagram of the circuit connection when the battery string on the right side of the solar cell module fails in an embodiment of this utility model.

[0031] Figure 12 This is a schematic diagram of the structure of the battery cell layer, the first protective layer, the second protective layer and the insulating layer in this embodiment of the present invention.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Cell layer; 11. Gap space; 12. Light-receiving surface; 13. Backlight surface; A. Cell array; B. Cell string group; C. Cell string; D. Cell segment;

[0034] 2. Wiring structure; 21. First conductor; 211. First connector; 22. Second conductor; 221. Second connector;

[0035] 31. First bypass diode; 32. Second bypass diode; 33. Third bypass diode;

[0036] 41. First junction box; 42. Second junction box;

[0037] 51. Positive electrode side; 52. Negative electrode side;

[0038] 61. First protective layer; 62. Second protective layer;

[0039] 7. Insulation layer. Detailed Implementation

[0040] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. It should also be noted that, for ease of description, only the parts relevant to the present invention are shown in the drawings, not all of the structures. In the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessarily obscuring the concept of the present invention. The accompanying drawings show various structural schematic diagrams according to embodiments of the present invention. These drawings are not drawn to scale, and some details are enlarged for clarity and may be omitted. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from actual practices due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed. In the context of the present invention, when a layer / element is referred to as being "on" another layer / element, the layer / element may be directly on the other layer / element, or there may be an intermediate layer / element between them. Additionally, if one layer / component is "above" another layer / component in one orientation, then when the orientation is reversed, that layer / component can be "below" that other layer / component.

[0041] refer to Figures 1 to 12 This embodiment provides a solar cell module, including: a cell layer 1, a wiring structure 2, and a plurality of bypass diodes. The cell layer 1 includes a plurality of cell strings B, with a gap space 11 between adjacent cell strings B. The cell layer 1 has a light-receiving surface 12 and a backlight surface 13 disposed opposite to each other. The wiring structure 2 is disposed in the gap space 11 and is suitable for connecting the cell strings B in series or in parallel. The plurality of bypass diodes are disposed on the wiring structure 2 to connect the plurality of cell strings B in parallel respectively. At the end of the wiring structure 2 connected to the bypass diodes, there is a connection end that bends and protrudes from the surface of the cell layer 1 toward the backlight surface 13.

[0042] Specifically, there are gap spaces 11 between several battery strings B in the battery cell layer 1, the light-receiving surface 12 of the battery cell layer 1 is used to receive sunlight, and the opposite side of the light-receiving surface 12 is the backlight surface 13. Figure 1 and Figure 2The backlight surface 13 of the battery cell layer 1 is shown. A wiring structure 2 is provided in the gap space 11 to partition each battery string group B. The wiring structure 2 includes several conductive wires to connect multiple battery string groups B in series or parallel. A bypass diode is placed in the connected path of the wiring structure 2 to achieve parallel connection with the battery string groups B. Typically, one bypass diode can achieve parallel connection with one or more battery string groups B, so that even if a part of the battery string group B fails and short-circuits, the bypass diode can still ensure the circuit continuity, short-circuiting the non-energized battery string group B, allowing the current to continue flowing to one end, thus forming a loop and not affecting the overall power generation of the battery pack. Therefore, the bypass diode needs to be fixed to the wiring structure 2 by methods such as welding. In this embodiment, the end of the wiring structure 2 where the bypass diode needs to be welded is set as a bent connection part, as shown in the reference. Figure 3 and Figure 4 The connection part protruding from the plane of the cell layer 1 or wiring structure 2 provides good connection positioning, which greatly reduces the difficulty of connecting with the bypass diode. At the same time, it avoids damage to the cell layer 1 caused by welding in the same plane, and also avoids connection failure caused by directly burning off the wiring structure 2 due to process precision issues. The process fault tolerance and the connection reliability between the bypass diode and the wiring structure 2 are greatly increased, effectively ensuring the power generation performance of the solar cell module.

[0043] refer to Figure 1 , Figure 2 as well as Figures 5 to 7 The battery cell layer 1 includes at least two battery arrays A spaced apart along a second direction, with bypass diodes disposed between adjacent battery arrays A; each battery array A includes multiple battery string groups B arranged along a first direction, with the first and second directions forming a preset angle, and the multiple battery string groups B connected in series through wiring structure 2; each battery string group B includes multiple battery strings C arranged in parallel; each battery string C includes multiple battery segments D arranged in series.

[0044] Specifically, the aforementioned battery segment D can be of various types, such as two-segment, three-segment, or four-segment. A two-segment refers to cutting a complete solar cell into two smaller sub-segments; similarly, a three-segment refers to cutting a complete solar cell into three smaller sub-segments; and a four-segment refers to cutting a complete solar cell into four smaller sub-segments. (Reference) Figures 5 to 7 For example, in this embodiment, six identical quarter-cell batteries are connected in series via solder strips to form a battery string C, as shown below. Figure 5 As shown; then, the two battery strings C are connected in parallel as a group to obtain a battery string group B, as shown. Figure 6As shown; then, the three battery string groups B are arranged along the first direction and connected in series to form a battery array A. Finally, two battery arrays A arranged symmetrically along the second direction are selected to form the battery layer 1 in this embodiment. The first direction and the second direction are perpendicular to each other in this embodiment. From a top view, the first direction is horizontal and the second direction is vertical. Figure 1 and Figure 2 As shown, the positive electrode side 51 and the negative electrode side 52 are represented on both sides of the battery cell layer 1 in the first direction to facilitate characterizing the current flow direction. It should be understood that in practice, the terminal of the junction box closer to the positive electrode side 51 is designated as the positive lead-out terminal, and the terminal closer to the negative electrode side is designated as the negative lead-out terminal. The positive and negative leads of the junction box are connected to an external circuit to supply the electrical energy generated by the solar cell module to the load or store it in the battery. In this embodiment, this layout helps reduce the current loss of a single battery cell and improves the overall power generation efficiency.

[0045] Traditional two-cell battery technology has become widespread. In order to seek greater breakthroughs, two-cell battery technology is being upgraded to four-cell and more-cell battery technology. The corresponding circuit layout will also change. This embodiment is a circuit layout designed for four-cell and more-cell technology based on the traditional layout, in order to improve power generation efficiency.

[0046] In this embodiment, reference Figures 1 to 4 The wiring structure 2 described above includes: a first conductor 21 and a second conductor 22. The first conductor 21 extends along a first direction and is disposed in the gap space 11 on the side of the battery string group B; the second conductor 22 extends along a second direction and is disposed in the gap space 11 between adjacent battery string groups B.

[0047] Specifically, in this embodiment, the first conductor 21 is a busbar structure extending along a first direction. The first conductor 21 includes a central busbar structure disposed between the two battery arrays A, and edge busbar structures disposed at both ends of the battery arrays A relatively far from the central busbar in a second direction, thereby collecting and discharging the current in the battery string group B. The second conductor 22 is a flying wire structure extending along a second direction. The flying wire structure is disposed on the back side of the battery cell layer 1, reducing the space occupied on the front side and enhancing the absorption of sunlight and aesthetics on the front side. The second conductor 22 divides the multiple battery string groups B into zones, ensuring that with the bypass diodes installed, the bypass diodes can control the battery string groups B in each zone. Even if a battery string group B in a certain zone is open-circuited, the overall module can still generate electricity.

[0048] In one embodiment, the solar cell module further includes: a plurality of junction boxes disposed between the cell array A on one side of the backlight surface 13, suitable for connecting the cell layer 1 to an external circuit; and a bypass diode integrated in the junction box.

[0049] Specifically, the junction box is the connection hub between the battery pack and the external circuit, safely and reliably transmitting the electrical energy generated by the battery pack to the external circuit. It also has overcurrent and overvoltage protection functions. The external circuit can be an inverter, energy storage system, etc. In this embodiment, the bypass diode is integrated in the junction box, which provides waterproof and dustproof protection for the bypass diode.

[0050] refer to Figure 1 and Figure 2 Based on the above configuration of two battery arrays A, each with three battery string groups B, this embodiment uses two junction boxes. One junction box integrates two bypass diodes, and the other integrates one bypass diode. Of course, the number of bypass diodes and junction boxes can be adjusted depending on the configuration of different battery string groups B.

[0051] Specifically, refer to Figure 1 and Figure 2 The first junction box 41 integrates a first bypass diode 31 and a second bypass diode 32. (See also...) Figure 3 and Figure 4 The first bypass diode 31 and the second bypass diode 32 are disposed at the intersection of the first conductor 21 and the second conductor 22, and are adapted to be connected in parallel with the battery string group B located on both sides of the intersection in a first direction, respectively. Specifically, refer to Figure 1 and Figure 2 The first bypass diode 31 is connected in parallel to the leftmost two battery string groups B in the first direction (hereinafter referred to as the left battery string group B), and the second bypass diode 32 is connected in parallel to the middle two battery string groups B in the first direction (hereinafter referred to as the middle battery string group B). The first conductor 21 has two first connection terminals 211 spaced apart in the first direction in the intersection area, and the second conductor 22 has two second connection terminals 221 spaced apart in the second direction, as shown below. Figure 3 As shown, the wiring structure 2 forms a four-way junction in this intersection area; or the second conductor 22 has a second connection terminal 221 between the two first connection terminals 211, as shown. Figure 4 As shown, wiring structure 2 forms three outgoing lines in the secondary intersection area.

[0052] refer to Figure 3When wiring structure 2 is configured with four outgoing lines in the aforementioned intersection area to house the first bypass diode 31 and the second bypass diode 32, the two second connection terminals 221 of the second conductor 22 are connected as a single unit. One end of the first bypass diode 31 is connected to the second connection terminal 221 of the single unit, and the other end is connected to the first connection terminal 211 of the battery string group B near the left side, thus achieving parallel connection with the battery string group B on the left. One end of the second bypass diode 32 is connected to the second connection terminal 221 of the single unit, and the other end is connected to another first connection terminal 211, thus achieving parallel connection with the battery string group B in the middle. (Reference) Figure 4 When the wiring structure 2 is configured with three outgoing lines in the aforementioned intersection area to house the first bypass diode 31 and the second bypass diode 32, one end of the first bypass diode 31 is connected to the second connection terminal 221, and the other end is connected to the first connection terminal 211 near the left-side battery string group B, thus achieving parallel connection with the left-side battery string group B; one end of the second bypass diode 32 is connected to the integrated second connection terminal 221, and the other end is connected to another first connection terminal 211, thus achieving parallel connection with the middle battery string group B. The wiring structure 2 is configured with three or four outgoing lines in the area integrating the two bypass diodes, and the outgoing line ends form protruding connection terminals, improving the installation reliability of the bypass diodes. The larger gap space 11 in the intersection area further avoids damage to the battery cell layer 1 during installation and fixation, ensuring the power generation performance of the solar cell module.

[0053] In this embodiment, a bypass diode is integrated in the second junction box 42. The intersection area of ​​the third bypass diode 33 with the first wire 21 and the second wire 22 is staggered, which is suitable for parallel connection with the battery string group B located next to the third bypass diode 33 in the second direction. That is, the third bypass diode 33 is connected in parallel to the upper and lower battery string groups B on the rightmost side in the first direction (hereinafter referred to as the right battery string group B). The first wire 21 includes two first connection terminals 211 arranged at intervals along the first direction. The two ends of the third bypass diode 33 are respectively connected to the two first connection terminals 211.

[0054] Of course, it cannot be ruled out that the third bypass diode 33 is located in the intersection area between the middle battery string group B and the right battery string group B.

[0055] In the second direction, the upper and lower battery arrays A are connected in parallel. Therefore, the current flow direction of the lower battery array is symmetrical to that of the upper battery array. The bold lines indicate the current flow path. (Reference) Figure 8 When all battery string groups B are working normally, all bypass diodes are in the off state, and current flows from the negative side 52 to the positive side 51.

[0056] refer to Figure 9When the battery string B on the left fails, the first bypass diode 31 is turned on, and the battery string B on the left is short-circuited by the first bypass diode 31. The current does not pass through this area, and the overall current still flows normally.

[0057] refer to Figure 10 When the middle battery string B fails, the second bypass diode 32 is turned on, and the middle battery string B is short-circuited by the second bypass diode 32. The current does not pass through this area, and the overall current still flows normally.

[0058] refer to Figure 11 When the middle battery string group B fails, the third bypass diode 33 is turned on, and the right battery string group B is short-circuited by the third bypass diode 33. The current does not pass through this area, and the overall current still flows normally.

[0059] Based on the above plan, and referring to Figure 12 The aforementioned solar cell module further includes an insulating layer 7 disposed between the cell layer 1 and the second conductor 22 to isolate the second conductor 22 from the cell layer 1.

[0060] An insulating layer 7 is used on the backlight surface 13 to separate the battery cell layer 1 from the flying wire structure, preventing short circuits caused by contact. The material of the insulating layer 7 can be organic materials such as polytetrafluoroethylene (PTFE), rubber, polyethylene (PE), and polyester (PET). Polyethylene (PE) is a thermoplastic with good insulation and corrosion resistance, low cost, and easy processing; polytetrafluoroethylene (PTFE) has extremely high chemical corrosion resistance and high temperature resistance, especially in applications requiring resistance to harsh environments such as strong acids and alkalis; polyester (PET) not only has good insulation properties but also high mechanical strength and heat resistance.

[0061] The width of the second conductor 22 is 2mm to 3mm; the width of the insulating layer 7 is 6mm to 10mm. Limiting the width of the insulating strip to 6mm to 10mm ensures that the width of the insulating strip can completely cover the second conductor 22, while avoiding excessive shading of the backlight side 13 of the battery cell layer 1 by the insulating strip.

[0062] The second conductor 22 and the insulating layer 7 are both centrally located in the gap space 11, which reduces the shading of the grid lines on the back surface 13 of the cell layer 1 and increases the bifaciality of the module.

[0063] Further, refer to Figure 12 The aforementioned solar cell module further includes: a first protective layer 61 and a second protective layer 62. The first protective layer 61 is disposed on the light-receiving surface 12 of the cell layer 1; the second protective layer 62 is disposed on the back-lighting surface 13 of the cell layer 1 and is located between the cell layer 1 and the insulating layer 7.

[0064] Specifically, the first protective layer 61 and the second protective layer 62 are respectively attached to the light-receiving surface 12 and the backlight surface 13 of the battery cell layer 1, serving as an adhesive cross-linking agent, which can reduce the breakage rate of the battery cell; it can also prevent the pressure of the superimposed insulating layer 7 and wiring structure 2 from causing microcracks in the battery cell. The first protective layer 61 and the second protective layer 62 can be EVA films.

[0065] Furthermore, the thickness of the first protective layer 61 and the second protective layer 62 ranges from 50μm to 150μm. An excessively thick protective layer can easily increase the pressure on the battery cell layer 1, while an excessively thin protective layer can not adequately protect the battery cell layer 1.

[0066] Further functional descriptions of the above structures are the same as those of the corresponding embodiments described above, and will not be repeated here.

[0067] The above description does not provide detailed explanations of the technical aspects of each layer's patterning, etching, etc. However, those skilled in the art should understand that various technical means can be used to form layers and regions of the desired shape. Furthermore, to form the same structure, those skilled in the art can also design methods that are not entirely identical to those described above. Additionally, although various embodiments have been described above, this does not mean that the measures in the various embodiments cannot be used advantageously in combination.

[0068] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A solar cell module, characterized in that, include: A battery cell layer, the battery cell layer comprising multiple battery string groups, with gaps between adjacent battery string groups; The battery cell layer also has a light-receiving surface and a backlighting surface that are arranged opposite to each other; A wiring structure, disposed in the gap space, is suitable for connecting the battery string group in series or in parallel; Multiple bypass diodes are disposed on the wiring structure to connect multiple battery string groups in parallel respectively; The wiring structure has a connection end that bends and protrudes from the surface of the battery cell layer toward the backlight surface at the end connected to the bypass diode.

2. The solar cell module according to claim 1, characterized in that, The battery cell layer includes at least two battery arrays spaced apart along a second direction, and the bypass diodes are disposed between adjacent battery arrays; each battery array includes multiple battery string groups arranged along a first direction, the first direction and the second direction forming a preset angle, and the multiple battery string groups are connected in series through the wiring structure; each battery string group includes multiple battery strings arranged in parallel; each battery string includes multiple battery segments arranged in series.

3. The solar cell module according to claim 2, characterized in that, The wiring structure includes: A first conductor extends along a first direction and is disposed in the gap space beside the battery string; The second conductor extends along the second direction and is disposed in the gap space between adjacent battery strings.

4. The solar cell module according to claim 3, characterized in that, Also includes: Multiple junction boxes are disposed between the battery array on one side of the backlight surface, and are suitable for connecting the battery cell layer to external circuitry; The bypass diode is integrated in the junction box.

5. The solar cell module according to claim 4, characterized in that, The junction box includes: a first junction box having a first bypass diode and a second bypass diode, wherein the first bypass diode and the second bypass diode are disposed in the intersection area of ​​the first conductor and the second conductor, and are adapted to be connected in parallel with battery strings located on both sides of the intersection area in a first direction, respectively; The first conductor has two first connection ends spaced apart in a first direction in the intersection area, and the second conductor has two second connection ends spaced apart in a second direction, or the second conductor has a second connection end between the two first connection ends.

6. The solar cell module according to claim 5, characterized in that, The junction box further includes: a second junction box having a third bypass diode, wherein the third bypass diode is offset from the intersection area of ​​the first conductor and the second conductor, and is suitable for parallel connection with a battery string located next to the third bypass diode in the second direction; the first conductor includes two first connection terminals spaced apart along the first direction.

7. The solar cell module according to any one of claims 3-6, characterized in that, Also includes: An insulating layer is disposed between the battery cell layer and the second conductor to isolate the second conductor from the battery cell layer.

8. The solar cell module according to claim 7, characterized in that, The width of the second conductor ranges from 2mm to 3mm; the width of the insulation layer ranges from 6mm to 10mm.

9. The solar cell module according to claim 8, characterized in that, Also includes: The first protective layer is disposed on the light-receiving surface of the battery cell layer; The second protective layer is disposed on the back surface of the battery cell layer and is located between the battery cell layer and the insulating layer.

10. The solar cell module according to claim 9, characterized in that, The thickness of the first protective layer and the second protective layer ranges from 50 μm to 150 μm.

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