Photovoltaic module

Abstract

The invention relates to the photovoltaic field, and provides a photovoltaic module, which comprises a first middle bus bar provided with a first lead-out part; the second middle bus bar is provided with a second lead-out part, and the first lead-out part and the second lead-out part are arranged at an interval in the first direction; the first jumper wire extends in the second direction, and at least part of the first jumper wire is in lap joint with the first middle bus bar and is electrically connected with the first middle bus bar; wherein the first jumper wire is provided with a notch part, and when the first jumper wire is in lap joint with the first middle bus bar, the first lead-out part is arranged in the notch part in a penetrating manner; the first direction intersects the second direction. The gap part can provide an accommodating space for the first lead-out part, and the first lead-out part can move in the direction away from the second lead-out part, so that a reasonable distance can be kept between the first lead-out part and the second lead-out part, and the risk of short circuit caused by too short distance between the first lead-out part and the second lead-out part is reduced; and the electrical connection reliability of the photovoltaic module is improved.

Description

Technical Field

[0001] The present application relates to the field of photovoltaics, and in particular to a photovoltaic module. Background Art

[0002] Solar energy is an inexhaustible renewable energy source for mankind. Photovoltaic modules are the core and most important part of solar power generation systems. Their function is to convert solar energy into electrical energy and store it in batteries or drive loads.

[0003] A photovoltaic module is equipped with at least a junction box and first and second intermediate busbars connected to the junction box, respectively. The first and second intermediate busbars have opposite polarities. In existing photovoltaic module structures, the lead ends of the first and second intermediate busbars are too close to each other, which can easily cause contact short circuits and affect the normal operation of the photovoltaic module. Summary of the Invention

[0004] In view of this, the present application provides a photovoltaic module to solve the problem in the prior art that the lead-out ends of the first intermediate bus bar and the lead-out ends of the second intermediate bus bar are easily short-circuited due to being too close to each other.

[0005] An embodiment of the present application provides a photovoltaic assembly, including: a first intermediate bus bar, provided with a first lead-out portion; a second intermediate bus bar, provided with a second lead-out portion, the first lead-out portion and the second lead-out portion being spaced apart in a first direction; a first jumper wire, extending along a second direction, at least a portion of the first jumper wire being overlapped with the first intermediate bus bar and electrically connected to the first intermediate bus bar; wherein the first jumper wire is provided with a notch portion, and when the first jumper wire is overlapped with the first intermediate bus bar, the first lead-out portion is passed through the notch portion; the first direction intersects with the second direction.

[0006] In a possible implementation, along the first direction, the width W1 of the notch is 3 mm to 6 mm.

[0007] In a possible implementation, along a direction from the first lead-out portion to the second lead-out portion, a length of the notch portion in the second direction gradually increases.

[0008] In one possible implementation, the first intermediate bus bar further includes a first main body portion, the first main body portion extends along the first direction, the first jumper is overlapped on the first main body portion, and the first lead-out portion is arranged at an end portion of the first main body portion; along the first direction, a distance L1 between the first lead-out portion and a side wall of the notch portion is 1 mm to 3 mm.

[0009] In a possible implementation, the second intermediate busbar further includes a second main body portion extending along the first direction; and the second lead portion is provided at an end of the second main body portion close to the first lead portion.

[0010] In one possible implementation, the second intermediate busbar further includes a second main body portion and a connecting portion, both of which extend along the first direction; the connecting portion overlaps the second main body portion, and the connecting portion is fixedly connected to the second main body portion and the second lead-out portion, respectively; along the first direction, there is a gap between one end of the second main body portion close to the first intermediate busbar and the second lead-out portion.

[0011] In one possible implementation, the connecting portion and the second lead-out portion are an integrated structure, and along the thickness direction of the connecting portion, the bottom surface of the connecting portion is fixedly connected to the second main body portion; along the first direction, the second lead-out portion is arranged at one end of the connecting portion close to the first intermediate bus bar.

[0012] In one possible implementation, the second main body, the connecting portion and the second lead-out portion are an integrated structure; along the first direction, one end of the connecting portion is arranged at an end of the second main body close to the first intermediate bus bar; and the second lead-out portion is arranged at an end of the connecting portion away from the first intermediate bus bar.

[0013] In a possible implementation, along the first direction, a distance L2 between an end of the second main portion close to the first middle bus bar and the second lead portion is 2 mm to 8 mm.

[0014] In a possible implementation, along the first direction, a distance L3 between the second main body portion and the first lead-out portion is 2 mm to 10 mm.

[0015] In a possible implementation, the photovoltaic assembly further includes a first battery string group and a second battery string group arranged in sequence along a first direction, and further includes a first end bus bar, a second end bus bar, a third end bus bar and a fourth end bus bar; along the second direction, the two ends of the first battery string group are electrically connected to the first end bus bar and the second end bus bar, respectively, the first battery string group includes a first upper battery string group and a first lower battery string group distributed along the second direction, and the first upper battery string group and the first lower battery string group are connected in parallel through the first intermediate bus bar; along the second direction, the two ends of the second battery string group are electrically connected to the third end bus bar and the fourth end bus bar, respectively, the second battery string group includes a second upper battery string group and a second lower battery string group distributed along the second direction, and the second upper battery string group and the second lower battery string group are connected in parallel through the second intermediate bus bar; the two ends of the first jumper along the second direction are electrically connected to the third end bus bar and the fourth end bus bar, respectively.

[0016] In one possible implementation, the first upper battery string group, the first lower battery string group, the second upper battery string group, and the second lower battery string group each include a plurality of battery strings, each of which includes a plurality of battery cells connected in series; and along the second direction, two adjacent battery cells are overlapped.

[0017] In a possible implementation, the photovoltaic assembly further includes a first isolation bar, and the first isolation bar is disposed between the first jumper and the solar cell along a thickness direction of the photovoltaic assembly.

[0018] The present application has the beneficial effect of providing space for the first lead portion by providing a notch, allowing the first lead portion to move away from the second lead portion, thereby ensuring a reasonable spacing between the first and second lead portions, reducing the risk of short circuiting caused by contact between the first and second lead portions due to their proximity. It also ensures that the spacing between the first and second lead portions meets the opening distance requirements of the first junction box, thereby improving the electrical connection reliability of the photovoltaic module. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0020] Figure 1 A schematic diagram of the structure of a photovoltaic module provided in an embodiment of the present application; Figure 2 for Figure 1 Circuit diagram of the photovoltaic module in; Figure 3 for Figure 1 Schematic diagram of the structure of the battery string in FIG; Figure 4 for Figure 1 Schematic diagram of the cross-sectional structure of a local photovoltaic module; Figure 5 for Figure 1 A schematic structural diagram of the first intermediate bus bar, the second intermediate bus bar and the first jumper in the first embodiment; Figure 6 for Figure 5 A top view of the structure in FIG; Figure 7 for Figure 6 A schematic diagram of the local structure of the first jumper in FIG; Figure 8 for Figure 1 A schematic structural diagram of the first intermediate bus bar, the second intermediate bus bar and the first jumper in the second embodiment; Figure 9 for Figure 1 A schematic structural diagram of the first intermediate bus bar, the second intermediate bus bar and the first jumper in a third embodiment; Figure 10 for Figure 1 Schematic diagram of the cross-sectional structure of the photovoltaic module.

[0021] Reference numerals: 100-encapsulation layer; 200-cover plate; 10-first battery string group; 101-first upper battery string group; 102-first lower battery string group; 20- second battery string group; 201-second upper battery string group; 202-second lower battery string; 30-third battery string; 301-the third upper battery string; 302-third lower battery string; 40-battery string; 401-battery cell; 401a-first edge busbar; 401b-second edge main grid; 402-welding strip; 50-first isolation strip; 60-first bypass diode; 70- second bypass diode; 80- third bypass diode; 90-second isolation strip; 1- first intermediate bus bar; 11- first lead-out portion; 12- first main body; 2-second intermediate bus bar; 21- second lead-out portion; 22- second main body; 23-connecting part; 3- First jumper; 31- notch; 4-first end bus bar; 5-second end bus bar; 6-third end bus bar; 7- fourth end bus bar; 8- Second jumper; 9- Third intermediate bus bar. DETAILED DESCRIPTION

[0022] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0023] It should be clear that the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0024] The terms used in the embodiments of the present application are for the purpose of describing specific embodiments only and are not intended to limit the present application. The singular forms "a", "an", "the" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise.

[0025] It should be understood that the term "and / or" as used herein simply describes a relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A alone, A and B together, or B alone. Furthermore, the character " / " in this document generally indicates an "or" relationship between the associated objects.

[0026] It should be noted that the directional words such as "upper", "lower", "left", and "right" described in the embodiments of the present application are described based on the angles shown in the accompanying drawings and should not be understood as limiting the embodiments of the present application. In addition, in the context, it should be understood that when it is mentioned that an element is connected to another element "on" or "under", it can not only be directly connected to the other element "on" or "under", but also be indirectly connected to the other element "on" or "under" through an intermediate element.

[0027] The embodiment of the present application provides a photovoltaic module, such as Figure 1 As shown, the photovoltaic module includes a third battery string group 30, a first battery string group 10, and a second battery string group 20 arranged in sequence along a first direction X, and also includes a first intermediate bus bar 1, a second intermediate bus bar 2, a third intermediate bus bar 9, a first end bus bar 4, a second end bus bar 5, a third end bus bar 6, and a fourth end bus bar 7. Along the second direction Y, both ends of the third battery string group 30 are electrically connected to the first end bus bar 4 and the second end bus bar 5, respectively. The third battery string group 30 includes a third upper battery string group 301 and a third lower battery string group 302 distributed along the second direction Y. The third upper battery string group 301 and the third lower battery string group 302 are connected in parallel via the third intermediate bus bar 9. Along the second direction Y. The two ends of the first battery string group 10 are electrically connected to the first end bus bar 4 and the second end bus bar 5, respectively. The first battery string group 10 includes a first upper battery string group 101 and a first lower battery string group 102 distributed along the second direction Y. The first upper battery string group 101 and the first lower battery string group 102 are connected in parallel via a first intermediate bus bar 1. Along the second direction Y, the two ends of the second battery string group 20 are electrically connected to the third end bus bar 6 and the fourth end bus bar 7, respectively. The second battery string group 20 includes a second upper battery string group 201 and a second lower battery string group 202 distributed along the second direction Y. The second upper battery string group 201 and the second lower battery string group 202 are connected in parallel via a second intermediate bus bar 2.

[0028] The first upper battery string group 101, the first lower battery string group 102, the second upper battery string group 201, the second lower battery string group 202, the third upper battery string group 301 and the third lower battery string group 302 respectively include at least two parallel battery strings 40, and each battery string 40 includes a plurality of battery cells 401 connected in series. Figure 2 As shown, the polarity of the third upper battery string group 301 and the battery strings 40 adjacent to the first upper battery string group 101 are opposite, and the third upper battery string group 301 and the first upper battery string group 101 are connected in series via the first end bus bar 4; the polarity of the third lower battery string group 302 and the battery strings 40 adjacent to the first lower battery string group 102 are opposite, and the third lower battery string group 302 and the first lower battery string group 102 are connected in series via the second end bus bar 5.

[0029] It should be noted that the first direction X intersects with the second direction Y. Figure 1 As shown, one of the first direction X and the second direction Y may be the length direction of the photovoltaic component, and the other may be the width direction of the photovoltaic component.

[0030] In some embodiments, as Figure 3 As shown, in the same battery string 40, multiple battery cells 401 are sequentially connected in series via welding ribbons 402. Two adjacent battery cells 401 along the second direction Y are arranged in an overlapping manner, that is, at least portions of the two adjacent battery cells 401 overlap in the thickness direction Z of the photovoltaic module. When the battery cells 401 are arranged in this manner, the spacing between two adjacent battery cells 401 can be reduced, allowing more battery cells 401 to be arranged within a limited area of ​​the photovoltaic module, reducing the blank area of ​​the photovoltaic module layout, and increasing the light-receiving area of ​​the photovoltaic module per unit area, thereby increasing the power generation per unit area of ​​the photovoltaic module and further improving the photovoltaic module's photoelectric conversion efficiency.

[0031] The embodiments of the present application do not limit the types of the battery cell 401. The types of the battery cell 401 include, but are not limited to, Passivated Emitter Rear Cell (PERC), Tunnel Oxide Passivated Contact (TOPCon), Heterojunction with Intrinsic Thin-film (HJT), Interdigitated Back Contact (IBC), Heterojunction Back Contact (HBC), Tunnel Oxide Back Contact (TBC), Perovskite Cell, etc.

[0032] A PERC cell, along its thickness, consists of a front surface silver electrode, a front surface silicon nitride passivation layer, a phosphorus emitter layer, a P-type silicon substrate layer, a local aluminum back field, a metal aluminum back electrode, and a back passivation layer (Al2O3 / SiNx). PERC cells use a passivation film to passivate the back surface, replacing the all-aluminum back field. This enhances internal back reflection of light from the silicon substrate, reduces the back recombination rate, and increases cell efficiency by 0.5%-1%.

[0033] A TOPCon cell, along its thickness, consists of a silver electrode, a front silicon nitride passivation layer, a boron-doped emitter, an N-type base silicon layer, a diffused doped layer, an ultrathin silicon oxide layer, doped polysilicon, silicon nitride, and a silver electrode. The back of the cell consists of an ultrathin silicon oxide layer (1nm-2nm) and a phosphorus-doped microcrystalline amorphous hybrid silicon thin film, which together form a passivated contact structure. This structure blocks minority carrier-hole recombination, improving the cell's open-circuit voltage and short-circuit current. The ultrathin oxide layer allows majority electrons to tunnel into the polysilicon layer while blocking minority carrier-hole recombination. The excellent passivation effect of the ultrathin silicon oxide and heavily doped silicon film causes surface band bending of the silicon wafer, creating a field passivation effect. This significantly increases the probability of electron tunneling and reduces contact resistance, thereby increasing the cell's open-circuit voltage and short-circuit current, and thus improving the cell's conversion efficiency.

[0034] For HJT cells, along their thickness direction, the HJT cells include a front low-temperature silver electrode, a front conductive film, an N-type amorphous silicon film, an intrinsic amorphous silicon film, an N-type base silicon layer, an intrinsic amorphous silicon film, a P-type amorphous silicon film, a back conductive film, and a back low-temperature silver electrode.

[0035] An IBC cell, along its thickness, consists of a silicon nitride inversion layer, an N+ front surface field, an N-type base silicon layer, a P+ emitter, an N+ back field, an aluminum oxide passivation layer, a silicon nitride anti-reflection layer, and a metallic silver electrode. IBC cells utilize ion implantation technology to achieve P and N regions with excellent uniformity and precisely controllable junction depth. The front of the cell is free of grid lines, eliminating current losses from metal electrode shading and maximizing the utilization of incident photons. This improves short-circuit current by approximately 7% compared to conventional solar cells. Due to the back-contact structure, grid line shading is not a concern, allowing for a wider grid line ratio, reducing series resistance and achieving a high fill factor. Surface passivation and surface light trapping structures can be optimized, resulting in a lower front-surface recombination rate and surface reflection.

[0036] HBC cells combine the advantages of IBC cells and heterojunction cells. Their front surface passivation layer utilizes hydrogenated amorphous silicon, while N-type and P-type amorphous silicon thin films are deposited on the back surface to form a heterojunction. HBC cells fully utilize the superior surface passivation properties of amorphous silicon. The heterojunction structure formed on the back surface has excellent passivation, enabling both higher short-circuit current and open-circuit voltage, thereby improving photoelectric conversion efficiency.

[0037] For TBC batteries, TBC batteries have the advantages of Topcon's tunneling oxide layer technology and IBC's back-arranged electrodes. The passivation effect and open-circuit voltage are significantly improved, which can achieve higher battery conversion efficiency while being economical. The complete production process of TBC batteries mainly includes depositing tunneling oxide layers and P+ polysilicon, depositing passivation films, and printing electrodes on the back of silicon wafers. On the basis of the TOPCon production process, TBC batteries need to add related processes such as masks, laser grooving, PN area preparation, and etching of the back electrodes. The mask is mainly completed by APCVD or PECVD, the preparation of the PN area is mainly completed by PECVD, the etching mainly uses traditional wet equipment, and the grooving process needs to be completed by laser equipment.

[0038] A perovskite cell, along its thickness, consists of a substrate material, a conductive film, an electron transport layer (titanium dioxide), a perovskite absorption layer (hole transport layer), and a metal cathode. Perovskite materials have a high light absorption coefficient and a long carrier diffusion distance. After photons absorbed by the perovskite material are converted into electrons, they are easily collected by the electrode with minimal loss. This results in a high photogenerated voltage and current, giving perovskites high photoelectric conversion efficiency.

[0039] In addition, cell 401 may also be a back-contact stacked cell, comprising a back-contact bottom cell and a perovskite top cell, wherein the perovskite top cell is electrically connected to the light-facing surface of the back-contact bottom cell. The back-contact bottom cell may be one of the IBC, HBC, or TBC cells described above, and the perovskite top cell is a thin-film solar cell using a perovskite material as the photoactive layer. The structure of a perovskite cell primarily consists of the following key components: a transparent conductive substrate, an electron transport layer, a perovskite light-absorbing layer, a hole transport layer, and a metal electrode. These components work together to enable the perovskite cell to effectively absorb sunlight and convert it into electrical energy. The perovskite material in the perovskite light-absorbing layer has excellent light absorption properties, can absorb a wider spectral range, and effectively convert short-wavelength spectra, resulting in a high photoelectric conversion efficiency for the perovskite top cell.

[0040] Among them, if the battery cell 401 is one of PERC batteries, TOPCon batteries, HJT batteries or perovskite batteries, when two adjacent battery cells 401 are electrically connected through the welding ribbon 402, one end of the welding ribbon 402 is welded to the grid line on the light-facing surface of one of the battery cells 401, and the other end is welded to the grid line on the backlight surface of the other battery cell 401; if the battery cell 401 is one of IBC batteries, HBC batteries, TBC batteries or back-contact stacked batteries, when two adjacent battery cells 401 are electrically connected through the welding ribbon 402, the two ends of the welding ribbon 402 are respectively welded to the grid lines on the backlight surfaces of the two battery cells 401.

[0041] In some embodiments, the battery cell 401 is a sliced ​​battery, specifically a two-slice battery, a three-slice battery, a four-slice battery, or an eight-slice battery, which is not limited in this embodiment of the present application.

[0042] In the embodiment of the present application, the photovoltaic assembly further includes a first junction box and a second junction box. A first lead portion 11 is provided at one end of the first intermediate bus bar 1 and the second intermediate bus bar 2, and a second lead portion 21 is provided at the end of the second intermediate bus bar 2 proximate to the first intermediate bus bar 1. The first lead portion 11 and the second lead portion 21 are spaced apart in a first direction X. The first lead portion 11 and the second lead portion 21 are used to electrically connect to the first junction box. A third lead portion is provided at one end of the third intermediate bus bar 9 proximate to the first intermediate bus bar 1, and a fourth lead portion is provided at one end of the first intermediate bus bar 1 proximate to the third intermediate bus bar 9. The third and fourth lead portions are used to electrically connect to the second junction box. The first and second junction boxes are used to connect to external devices.

[0043] The first lead portion 11 and the second lead portion 21 may extend perpendicularly to the plane where the battery cell 401 is located, or may extend obliquely relative to the plane where the battery cell 401 is located. That is, the angle between the first lead portion 11 and the plane where the battery cell 401 is located may not be 90°, and the angle between the second lead portion 21 and the plane where the battery cell 401 is located may not be 90°. The first lead portion 11 and the second lead portion 21 are preferably arranged parallel to each other.

[0044] Similarly, the third lead portion and the fourth lead portion may extend perpendicular to the plane where the battery cell 401 is located, or may extend obliquely relative to the plane where the battery cell 401 is located. That is, the angle between the third lead portion and the plane where the battery cell 401 is located may not be 90°, and the angle between the fourth lead portion and the plane where the battery cell 401 is located may not be 90°. The third lead portion and the fourth lead portion are preferably arranged parallel to each other.

[0045] like Figure 1 As shown, the photovoltaic assembly further includes a first jumper 3 and a second jumper 8 extending along the second direction Y. The first jumper 3 is located between the first battery string group 10 and the second battery string group 20, and the second jumper 8 is located between the third battery string group 30 and the first battery string group 10. The two ends of the first jumper 3 along the second direction Y are electrically connected to the third end bus bar 6 and the fourth end bus bar 7 respectively. The first jumper 3 is also electrically connected to the first intermediate bus bar 1, thereby enabling a series connection between the second battery string group 20 and the first battery string group 10, and further enabling a series connection between the first battery string group 10, the second battery string group 20 and the third battery string group 30. The two ends of the second jumper 8 along the second direction Y are electrically connected to the first end bus bar 4 and the second end bus bar 5 respectively. Combined Figure 2As shown, a first bypass diode 60 and a second bypass diode 70 are provided in the second junction box, a third bypass diode 80 is provided in the first junction box, the third battery string group 30 is connected in reverse parallel to the first bypass diode 60 via the second jumper 8, the first battery string group 10 is connected in reverse parallel to the second bypass diode 70 via the second jumper 8, and the second battery string group 20 is connected in reverse parallel to the third bypass diode 80 via the first jumper 3.

[0046] In the embodiment of the present application, a second jumper 8 electrically connected to the first end bus bar 4 and the second end bus bar 5 is provided between the third battery string group 30 and the first battery string group 10, so that the first bypass diode 60 can be connected in reverse parallel with the third battery string group 30 through the second jumper 8 (that is, the first bypass diode 60 is connected in parallel with the third battery string group 30, but with opposite polarity). When the battery cell 401 on any battery string 40 in the third battery string group 30 exhibits a hot spot effect due to obstruction or failure, the first bypass diode 60 can form a forward bias, so that the current bypasses the obstructed or faulty battery string 40 and flows through the first bypass diode 60, without affecting the normal power generation of other battery strings 40 in the third battery string group 30. Furthermore, the first battery string group 10 is connected in reverse parallel to the second bypass diode 70 via the second jumper 8 (i.e., the second bypass diode 70 is connected in parallel to the first battery string group 10 but with opposite polarity). When a hot spot effect occurs on the battery cells 401 on any battery string 40 within the first battery string group 10 due to obstruction or failure, the second bypass diode 70 can form a forward bias, allowing current to bypass the obstructed or failed battery string 40 and flow through the second bypass diode 70, without affecting the normal power generation of other battery strings 40 within the first battery string group 10. At the same time, the second battery string group 20 is connected in reverse parallel with the third bypass diode 80 via the first jumper 3 (i.e., the third bypass diode 80 is connected in parallel with the second battery string group 20, but with opposite polarity). When a hot spot effect occurs on the battery cells 401 on any battery string 40 within the second battery string group 20 due to obstruction or failure, the third bypass diode 80 can form a forward bias, allowing the current to bypass the obstructed or failed battery string 40 and flow through the third bypass diode 80, without affecting the normal power generation of other battery strings 40 within the second battery string group 20.

[0047] The first jumper 3 and the second jumper 8 are conductors made of conductive materials, specifically conductive metal strips.

[0048] In some embodiments, as Figure 4As shown, the width W2 of the first jumper 3 is 5mm-10mm, and the thickness H1 of the first jumper 3 is 0.1mm-0.3mm. When W2 and H1 respectively meet the above ranges, the first jumper 3 can achieve the effect of being wide and thin. A larger width W2 of the first jumper 3 is conducive to increasing the cross-sectional area of ​​the first jumper 3, thereby reducing the resistance of the first jumper 3; a thinner thickness H1 of the first jumper 3 can prevent the first jumper 3 from applying excessive stress to the edge of the battery cell 401 during the lamination process, thereby reducing the risk of hidden cracks in the battery cell 401.

[0049] Optionally, the width W2 of the first jumper 3 is 5mm~8mm, and W1 can be 5mm, 5.1mm, 5.2mm, 5.3mm, 5.4mm, 5.5mm, 5.6mm, 5.7mm, 5.8mm, 5.9mm, 6mm, 6.1mm, 6.2mm, 6.3mm, 6.4mm, 6.5mm, 6.6mm, 6.7mm, 6.8mm, 6.9mm, 7mm, 7.1mm, 7.2mm, 7.3mm, 7.4mm, 7.5mm, 7.6mm, 7.7mm, 7.8mm, 7.9mm or 8mm, or other values ​​within the above range, which is not limited in the embodiments of the present application.

[0050] Optionally, the width W2 of the first jumper 3 is 8mm~10mm, and W1 can be 8mm, 8.1mm, 8.2mm, 8.3mm, 8.4mm, 8.5mm, 8.6mm, 8.7mm, 8.8mm, 8.9mm, 9mm, 9.1mm, 9.2mm, 9.3mm, 9.4mm, 9.5mm, 9.6mm, 9.7mm, 9.8mm, 9.9mm or 10mm, or other values ​​within the above range, which is not limited in the embodiments of the present application.

[0051] Optionally, the thickness H1 of the first jumper 3 is 0.1mm~0.2mm, and H1 can be 0.1mm, 0.11mm, 0.12mm, 0.13mm, 0.14mm, 0.15mm, 0.16mm, 0.17mm, 0.18mm, 0.19mm or 0.2mm, or other values ​​within the above range. The embodiment of the present application is not limited to this.

[0052] Optionally, the thickness H1 of the first jumper 3 is 0.2mm~0.3mm, and H1 can be 0.2mm, 0.21mm, 0.22mm, 0.23mm, 0.24mm, 0.25mm, 0.26mm, 0.27mm, 0.28mm, 0.29mm or 0.3mm, or other values ​​within the above range. The embodiment of the present application is not limited to this.

[0053] like Figure 4 As shown, the string spacing between the first cell string group 10 and the second cell string group 20 is W3, and the width W2 of the first jumper 3 is greater than W3, that is, at least a portion of the first jumper 3 will overlap the cell 401 of the first cell string group 10 and the cell 401 of the second cell string group 20. To prevent the first jumper 3 from contacting the cell 401 in the first cell string group 10 or the cell 401 in the second cell string group 20 and causing a short circuit, a first isolation bar 50 is further provided between the first jumper 3 and the cell 401. The first isolation bar 50 is made of an insulating material. Along the thickness direction Z of the photovoltaic module, the two surfaces of the first isolation bar 50 can be bonded and fixed to the first jumper 3 and the cell 401, respectively.

[0054] In some embodiments, as Figure 4 As shown, the thickness H2 of the first isolation bar 50 is greater than or equal to 150 μm. The first isolation bar 50 provides insulation between the first jumper 3 and the battery cell 401. The insulation performance of the first isolation bar 50 decreases as the thickness H2 of the first isolation bar 50 decreases. If the thickness H2 of the first isolation bar 50 is less than 150 μm, the insulation performance of the first isolation bar 50 is poor, and the possibility of a short circuit between the first jumper 3 and the battery cell 401 is high. Therefore, when the thickness H2 of the first isolation bar 50 falls within the above range, the insulation effect between the first jumper 3 and the battery cell 401 can be ensured. However, the thickness H2 of the first isolation bar 50 should not be too large to avoid the first isolation bar 50 applying excessive stress to the edge of the battery cell 401 during the lamination process.

[0055] Optionally, the thickness H2 of the first isolation strip 50 is 150 μm, 155 μm, 160 μm, 165 μm, 170 μm, 175 μm or 180 μm, or other values ​​within the above range, which is not limited in the embodiment of the present application.

[0056] In some embodiments, as Figure 4 As shown, along the width direction of the first jumper 3, the spacing W4 between one end of the first jumper 3 and the end of the first isolation strip 50 is 2mm~3mm, and the spacing W5 between the other end of the first jumper 3 and the other end of the first isolation strip 50 is 2mm~3mm, that is, the two sides of the first isolation strip 50 are respectively 2mm~3mm wider than the first jumper 3, so as to reduce the risk of the first jumper 3 contacting the battery cell 401 due to offset and causing a short circuit, which is beneficial to improve the insulation effect between the first jumper 3 and the battery cell 401.

[0057] Optionally, W4 can be 2mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm or 3mm, or other values ​​within the above range, which is not limited in the embodiments of the present application.

[0058] Similarly, W5 can be 2mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm or 3mm, or other values ​​within the above range, which is not limited in the embodiments of the present application.

[0059] Among them, W4 and W5 can be equal or different.

[0060] In some embodiments, the cell 401 of the cell string 40 adjacent to the second cell string group 20 in the first cell string group 10 has a first edge busbar 401a, and the cell 401 of the cell string 40 adjacent to the first cell string group 10 in the second cell string group 20 has a second edge busbar 401b. Along the width direction of the first separator 50, a spacing W6 between the edge of the first separator 50 and the first edge busbar 401a is greater than 3 mm, and a spacing W7 between the edge of the first separator 50 and the second edge busbar 401b is greater than 3 mm. Because high-temperature adhesive tape is required for pre-fixing the first jumper 3, the first separator 50, and the cell string 40, when W6 and W7 are both greater than 3 mm, the high-temperature adhesive tape is prevented from adhering to the first and second edge busbars 401a, 401b, or to the soldering tape connected to the first and second edge busbars 401a, 401b, thereby preventing bubbles from forming during the lamination process of the photovoltaic module.

[0061] Optionally, W6 can be 3.1mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm or 6mm, or other values ​​within the above range, which is not limited in the embodiments of the present application.

[0062] Similarly, W7 can be 3.1mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm or 6mm, or other values ​​within the above range, which is not limited in the embodiments of the present application.

[0063] Among them, W6 and W7 can be equal or different.

[0064] In some embodiments, a second isolation bar 90 is further provided between the second jumper 8 and the cells 401 of the third cell string 30 and the cells 401 of the first cell string 10. The second isolation bar 90 is made of an insulating material. Along the thickness direction Z of the photovoltaic module, the two surfaces of the second isolation bar 90 can be bonded to the second jumper 8 and the cells 401, respectively.

[0065] The thickness of the second isolation strip 90, the spacing requirement between the end of the second isolation strip 90 and the end of the second jumper 8, and the spacing requirement between the end of the second isolation strip 90 and the edge main grid of the battery cell 401 can refer to the thickness of the first isolation strip 50, the spacing requirement between the end of the first isolation strip 50 and the end of the first jumper 3, and the spacing requirements between the end of the first isolation strip 50 and the first edge main grid 401a and the end of the first isolation strip 50 and the second edge main grid 401b described above, and will not be repeated here.

[0066] In the embodiment of this application, Figure 5 As shown, at least a portion of the first jumper 3 overlaps the first intermediate busbar 1 to form an electrical connection with the first intermediate busbar 1. When the width W2 of the first jumper 3 is large, the first lead portion 11 needs to move closer to the second lead portion 21 to accommodate the first jumper 3. This will result in the distance between the first lead portion 11 and the second lead portion 21 being too close, not meeting the opening spacing of the first junction box. In addition, when the distance between the first lead portion 11 and the second lead portion 21 is too close, there is a risk of overlapping and shorting.

[0067] In order to avoid the distance between the first lead-out portion 11 and the second lead-out portion 21 being too close, the embodiment of the present application improves the structures of the first jumper 3, the first intermediate bus bar 1 and the second intermediate bus bar 2, which are described in detail below with reference to the accompanying drawings.

[0068] like Figure 5 As shown, the first jumper 3 is provided with a notch 31. When the first jumper 3 is connected to the first intermediate busbar 1, the first lead portion 11 is inserted into the notch 31. The notch 31 provides space for the first lead portion 11, allowing it to move away from the second lead portion 21. This ensures that a reasonable distance is maintained between the first lead portion 11 and the second lead portion 21, reducing the risk of contact short circuit caused by the first lead portion 11 and the second lead portion 21 being too close. It also ensures that the distance between the first lead portion 11 and the second lead portion 21 meets the opening distance requirements of the first junction box, improving the electrical connection reliability of the photovoltaic module.

[0069] In some embodiments, as Figure 6 and Figure 7As shown, the width W1 of the notch 31 is 3 mm to 6 mm along the first direction X. When the width W1 of the notch 31 falls within the above range, on the one hand, the notch 31 can provide sufficient accommodation space for the first lead-out portion 11, thereby ensuring that the spacing between the first lead-out portion 11 and the second lead-out portion 21 meets the opening spacing requirements of the junction box. On the other hand, the width of the notch 31 is not too large, ensuring sufficient welding area between the remaining portion of the first jumper 3 and the first intermediate busbar 1. At the same time, the structural strength of the first jumper 3 is not affected by an excessively wide notch 31, thereby preventing the first jumper 3 from breaking due to the provision of the notch 31.

[0070] Optionally, the width W1 of the notch portion 31 is 3 mm to 4.5 mm, and W1 can be 3 mm, 3.1 mm, 3.2 mm, 3.3 mm, 3.4 mm, 3.5 mm, 3.6 mm, 3.7 mm, 3.8 mm, 3.9 mm, 4 mm, 4.1 mm, 4.2 mm, 4.3 mm, 4.4 mm or 4.5 mm, or other values ​​within the above range. The embodiments of the present application are not limited to this.

[0071] Optionally, the width W1 of the notch portion 31 is 4.5 mm to 6 mm, and W1 can be 4.5 mm, 4.6 mm, 4.7 mm, 4.8 mm, 4.9 mm, 5 mm, 5.1 mm, 5.2 mm, 5.3 mm, 5.4 mm, 5.5 mm, 5.6 mm, 5.7 mm, 5.8 mm, 5.9 mm or 6 mm, or other values ​​within the above range. The embodiments of the present application are not limited to this.

[0072] In some embodiments, as Figure 6 and Figure 7 As shown, the length of the notch 31 in the second direction Y gradually increases along the direction from the first lead portion 11 to the second lead portion 21. That is, the notch 31 has a trapezoidal structure, and the open end of the notch 31 is longer to facilitate the placement of the first lead portion 11 within the notch 31 and reduce assembly difficulty. Furthermore, along the first direction X, the length L4 of the notch 31 away from the second lead portion 21 should be greater than the width of the first lead portion 11 to facilitate the placement of the first lead portion 11.

[0073] In some embodiments, a spacing L1 between the first lead portion 11 and the sidewall of the notch portion 31 is 1 mm to 3 mm along the first direction X. Reserving the spacing L1 between the first lead portion 11 and the sidewall of the notch portion 31 facilitates welding the first jumper 3 to the first main body 12, thereby reducing the difficulty of photovoltaic module production.

[0074] Optionally, the spacing L1 between the first lead-out portion 11 and the side wall of the notch portion 31 can be 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm or 3mm, or other values ​​within the above range, which is not limited in the embodiments of the present application.

[0075] In some embodiments, as Figure 5 and Figure 6 As shown, the first intermediate busbar 1 further includes a first main body 12, which extends along a first direction X and is configured to electrically connect to the first upper battery string group 101 and the first lower battery string group 102. The first jumper 3 is overlapped on the surface of the first main body 12, and the first lead portion 11 is provided at the end of the first main body 12. The first lead portion 11 and the first main body 12 can be an integral structure, formed by bending, or the first lead portion 11 and the first main body 12 can be a separate structure, fixedly connected together by welding to form an electrical connection.

[0076] In some embodiments, as Figure 5 As shown, the second intermediate busbar 2 also includes a second main body 22, which extends along the first direction X and is used to electrically connect to the second upper battery string group 201 and the second lower battery string group 202. Along the first direction X, the second lead portion 21 is provided at one end of the second main body 22 close to the first lead portion 11. The second lead portion 21 and the second main body 22 can be an integral structure, formed by bending the second lead portion 21. Alternatively, the second lead portion 21 and the second main body 22 can be a separate structure, and the two are fixedly connected together by welding to form an electrical connection.

[0077] In other embodiments, the structure of the second intermediate bus bar 2 may be improved to further increase the distance between the first lead-out portion 11 and the second lead-out portion 21. Figure 8As shown, the second intermediate busbar 2 further includes a connecting portion 23. Both the second main portion 22 and the connecting portion 23 extend along the first direction X. The connecting portion 23 overlaps the surface of the second main portion 22, and the two ends of the connecting portion 23 are respectively fixedly connected to the second main portion 22 and the second lead portion 21. Furthermore, along the first direction X, there is a gap between the end of the second main portion 22 closest to the first intermediate busbar 1 and the second lead portion 21. In other words, the provision of the connecting portion 23 can move the second lead portion 21 away from the first lead portion 11, thereby ensuring a reasonable spacing between the first lead portion 11 and the second lead portion 21, further reducing the risk of contact short circuits caused by the first lead portion 11 and the second lead portion 21 being too close.

[0078] Among them, Figure 8 As shown, along the first direction X, the distance L2 between the end of the second main body 22 close to the first intermediate bus bar 1 and the second lead-out portion 21 is 2 mm to 8 mm, so as to ensure that the distance between the second lead-out portion 21 and the first lead-out portion 11 is within a reasonable range, which will neither cause the second lead-out portion 21 and the first lead-out portion 11 to contact and short-circuit, nor cause the second lead-out portion 21 and the first lead-out portion 11 to be inconvenient to connect with the first junction box due to the excessive distance.

[0079] Optionally, the distance L2 between one end of the second main body 22 close to the first intermediate bus bar 1 and the second lead-out portion 21 is 2 mm to 5 mm, and L2 can be 2 mm, 2.2 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.8 mm, 3 mm, 3.2 mm, 3.4 mm, 3.5 mm, 3.6 mm, 3.8 mm, 4 mm, 4.2 mm, 4.4 mm, 4.5 mm, 4.6 mm, 4.8 mm, 5 mm, or other values ​​within the above range, which is not limited in the embodiments of the present application.

[0080] Optionally, the distance L2 between one end of the second main body 22 close to the first intermediate bus bar 1 and the second lead-out portion 21 is 5mm~8mm, and L2 can be 5mm, 5.2mm, 5.4mm, 5.5mm, 5.6mm, 5.8mm, 6mm, 6.2mm, 6.4mm, 6.5mm, 6.6mm, 6.8mm, 7mm, 7.2mm, 7.4mm, 7.5mm, 7.6mm, 7.8mm, 8mm, or other values ​​within the above range, which is not limited in the embodiments of the present application.

[0081] In one embodiment, Figure 8As shown, the connecting portion 23 can be integrally formed with the second lead portion 21, which is formed by bending. Along the thickness direction Z of the connecting portion 23, the bottom surface of the connecting portion 23 is fixedly connected to the second main body 22, so that the second main body 22 and the second lead portion 21 are fixedly connected and electrically connected. Along the first direction X, the second lead portion 21 can be disposed at the end of the connecting portion 23 that is closer to the first intermediate bus bar 1, or at the end of the connecting portion 23 that is farther from the first intermediate bus bar 1. When the second lead portion 21 is disposed at the end of the connecting portion 23 that is closer to the first intermediate bus bar 1, the connecting portion 23 will not obstruct the second lead portion 21 when the second lead portion 21 approaches the first lead portion 11, making it easier to adjust the bending angle of the second lead portion 21 relative to the first connecting portion 23, thereby increasing the flexibility of the second lead portion 21.

[0082] In another embodiment, Figure 9 As shown, the second main body 22, the connecting portion 23, and the second lead portion 21 form an integrated structure. The connecting portion 23 and the second lead portion 21 are both bent, resulting in the structure of the second intermediate busbar 2 being formed by bending the second main body 22 twice. Along the first direction X, one end of the connecting portion 23 is located at the end of the second main body 22 that is closer to the first intermediate busbar 1, and the second lead portion 21 is located at the end of the connecting portion 23 that is farther from the first intermediate busbar 1, ensuring that the second lead portion 21 is away from the first lead portion 11. When the second main body 22, the connecting portion 23, and the second lead portion 21 are configured as an integrated structure, the positional relationship of the connecting portion 23 and the second lead portion 21 relative to the second main body 22 can be adjusted by adjusting the bending position. This allows the position of the second lead portion 21 to be adjusted according to the size of the first junction box and the positions of the first jumper 3 and the first lead portion 11, making the second lead portion 21 more flexible.

[0083] In the above embodiments, Figure 6 As shown, along the first direction X, the distance L3 between the second main body 22 and the first lead-out portion 11 is 2 mm to 10 mm. When L3 meets the above range, the risk of overlapping short circuit between the first lead-out portion 11 and the second main body 22 can be reduced, thereby further improving the electrical reliability of the photovoltaic module.

[0084] Optionally, the spacing L3 between the second main body 22 and the first lead-out portion 11 is 2 mm to 5 mm, and L3 can be 2 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.7 mm, 2.8 mm, 2.9 mm, 3 mm, 3.1 mm, 3.2 mm, 3.3 mm, 3.4 mm, 3.5 mm, 3.6 mm, 3.7 mm, 3.8 mm, 3.9 mm, 4 mm, 4.1 mm, 4.2 mm, 4.3 mm, 4.4 mm, 4.5 mm, 4.6 mm, 4.7 mm, 4.8 mm, 4.9 mm or 5 mm, or other values ​​within the above range, which is not limited in the embodiments of the present application.

[0085] Optionally, the distance L3 between the second main body 22 and the first lead-out portion 11 is 5mm~8mm, and L3 can be 5mm, 5.1mm, 5.2mm, 5.3mm, 5.4mm, 5.5mm, 5.6mm, 5.7mm, 5.8mm, 5.9mm, 6mm, 6.1mm, 6.2mm, 6.3mm, 6.4mm, 6.5mm, 6.6mm, 6.7mm, 6.8mm, 6.9mm, 7mm, 7.1mm, 7.2mm, 7.3mm, 7.4mm, 7.5mm, 7.6mm, 7.7mm, 7.8mm, 7.9mm or 8mm, or other values ​​within the above range, which is not limited in the embodiments of the present application.

[0086] Optionally, the spacing L3 between the second main body 22 and the first lead-out portion 11 is 8mm~10mm, and L3 can be 8mm, 8.1mm, 8.2mm, 8.3mm, 8.4mm, 8.5mm, 8.6mm, 8.7mm, 8.8mm, 8.9mm, 9mm, 9.1mm, 9.2mm, 9.3mm, 9.4mm, 9.5mm, 9.6mm, 9.7mm, 9.8mm, 9.9mm or 10mm, or other values ​​within the above range, which is not limited in the embodiments of the present application.

[0087] In the above embodiments, Figure 6 As shown, the distance L5 between the second main body 22 and the first jumper 3 is greater than or equal to 2 mm. When L5 meets the above range, the risk of overlapping short circuit between the first jumper 3 and the second main body 22 can be reduced, thereby further improving the electrical reliability of the photovoltaic module.

[0088] Optionally, the spacing L5 between the second main body 22 and the first jumper 3 is 2.1mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm or 7mm, or other values ​​within the above range, which is not limited in the embodiments of the present application.

[0089] In the above embodiments, Figure 6 As shown, along the first direction X, the distance L6 that the second main body 22 extends beyond the second edge main grid 401b is 1mm~3mm. This can increase the welding connection area between the second main body 22 and the welding strip 402 on the second edge main grid 401b, thereby ensuring that the second intermediate bus bar 2 can form a reliable connection with the welding strip 402.

[0090] Optionally, the distance L6 that the second main body 22 extends beyond the second edge main grid 401b can be 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm or 3mm, or other values ​​within the above range, which is not limited in the embodiments of the present application.

[0091] The photovoltaic module structure provided in the embodiment ensures that the distance between the first lead-out portion 11 and the second lead-out portion 21 can meet the range of 5 mm to 15 mm to meet the requirements of the opening spacing of the first junction box.

[0092] like Figure 10 As shown, the photovoltaic module provided in the embodiment of the present application further includes an encapsulation layer 100 and a cover plate 200. The encapsulation layer 100 is used to cover the light-facing and backlight-facing surfaces of the cell string 40, and the cover plate 200 is used to cover the side of the encapsulation layer 100 away from the cell string 40. During the lamination process of the photovoltaic module, the encapsulation layer 100 is used to encapsulate and protect the cell 401 and the soldering ribbon 402, preventing the external environment from affecting the performance of the cell 401 and the soldering ribbon 402. At the same time, it can also bond the cover plate 200, the cell 401, and the soldering ribbon 402 into a whole.

[0093] The cover plate 200 can be made of a rigid material such as tempered glass, polyethylene terephthalate (PET), or polycarbonate (PC), or a flexible material such as polyvinyl fluoride (PVF), ethylene-tetrafluoroethylene (ETFE), or polyvinylidene fluoride (PVDF). The encapsulation layer 100 is a film made of ethylene-vinyl acetate (EVA), polyolefin elastomer (POE), or polyvinyl butyral (PVB). Alternatively, the encapsulation layer 100 can be an EPE film (EVA-POE-EVA co-extruded structure) or an EP film (EVA-POE co-extruded structure).

[0094] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A photovoltaic module, characterized in that: include: A first intermediate bus bar (1) is provided with a first lead-out portion (11); A second intermediate bus bar (2) is provided with a second lead-out portion (21), wherein the first lead-out portion (11) and the second lead-out portion (21) are spaced apart in a first direction; a first jumper (3) extending along the second direction, wherein at least a portion of the first jumper (3) overlaps the first intermediate bus bar (1) and is electrically connected to the first intermediate bus bar (1); The first jumper (3) is provided with a notch (31), and when the first jumper (3) is connected to the first intermediate bus bar (1), the first lead-out portion (11) is passed through the notch (31); The first direction intersects the second direction.

2. The photovoltaic module according to claim 1, characterized in that Along the first direction, the width W1 of the notch portion (31) is 3 mm to 6 mm.

3. The photovoltaic module according to claim 1, characterized in that Along the direction from the first lead-out portion (11) to the second lead-out portion (21), the length of the notch portion (31) in the second direction gradually increases.

4. The photovoltaic module according to claim 1, characterized in that The first intermediate busbar (1) further comprises a first main body portion (12), the first main body portion (12) extending along the first direction, the first jumper (3) being overlapped on the first main body portion (12), and the first lead portion (11) being arranged at an end portion of the first main body portion (12); Along the first direction, a distance L1 between the first lead-out portion (11) and the side wall of the notch portion (31) is 1 mm to 3 mm.

5. The photovoltaic module according to claim 1, characterized in that The second intermediate bus bar (2) further comprises a second main body portion (22), and the second main body portion (22) extends along the first direction; The second lead-out portion (21) is arranged at an end of the second main body portion (22) close to the first lead-out portion (11).

6. The photovoltaic module according to claim 1, characterized in that The second intermediate busbar (2) further comprises a second main body portion (22) and a connecting portion (23), wherein both the second main body portion (22) and the connecting portion (23) extend along the first direction; The connecting portion (23) is overlapped with the second main body portion (22), and the connecting portion (23) is fixedly connected to the second main body portion (22) and the second lead-out portion (21) respectively; Along the first direction, there is a gap between the second main body portion (22) and one end close to the first intermediate bus bar (1) and the second lead portion (21).

7. The photovoltaic module according to claim 6, characterized in that: The connecting portion (23) and the second lead-out portion (21) are an integrated structure, and along the thickness direction of the connecting portion (23), the bottom surface of the connecting portion (23) is fixedly connected to the second main body portion (22); Along the first direction, the second lead-out portion (21) is arranged at one end of the connecting portion (23) close to the first intermediate bus bar (1).

8. The photovoltaic module according to claim 6, characterized in that: The second main body portion (22), the connecting portion (23) and the second lead-out portion (21) are an integrated structure; Along the first direction, one end of the connecting portion (23) is arranged at one end of the second main body portion (22) close to the first intermediate bus bar (1); The second lead-out portion (21) is arranged at an end of the connecting portion (23) away from the first intermediate bus bar (1).

9. The photovoltaic module according to claim 6, characterized in that: Along the first direction, a distance L2 between an end of the second main body portion (22) close to the first intermediate bus bar (1) and the second lead portion (21) is 2 mm to 8 mm.

10. The photovoltaic module according to claim 5 or 6, characterized in that: Along the first direction, a distance L3 between the second main body portion (22) and the first lead portion (11) is 2 mm to 10 mm.

11. The photovoltaic module according to claim 1, characterized in that: The photovoltaic assembly further includes a first battery string group (10) and a second battery string group (20) arranged in sequence along a first direction, and further includes a first end bus bar (4), a second end bus bar (5), a third end bus bar (6) and a fourth end bus bar (7); Along the second direction, both ends of the first battery string group (10) are electrically connected to the first end bus bar (4) and the second end bus bar (5), respectively. The first battery string group (10) comprises a first upper battery string group (101) and a first lower battery string group (102) distributed along the second direction. The first upper battery string group (101) and the first lower battery string group (102) are connected in parallel via the first intermediate bus bar (1); Along the second direction, both ends of the second battery string group (20) are electrically connected to the third end bus bar (6) and the fourth end bus bar (7), respectively. The second battery string group (20) comprises a second upper battery string group (201) and a second lower battery string group (202) distributed along the second direction. The second upper battery string group (201) and the second lower battery string group (202) are connected in parallel via the second intermediate bus bar (2). Two ends of the first jumper (3) along the second direction are electrically connected to the third end bus bar (6) and the fourth end bus bar (7) respectively.

12. The photovoltaic module according to claim 11, characterized in that: The first upper battery string group (101), the first lower battery string group (102), the second upper battery string group (201), and the second lower battery string group (202) respectively include a plurality of battery strings (40), and the battery strings (40) include a plurality of battery cells (401) connected in series. Along the second direction, two adjacent battery slices (401) are arranged in an overlapping manner.

13. The photovoltaic module according to claim 12, characterized in that: The photovoltaic assembly further comprises a first isolation bar (50), and along the thickness direction of the photovoltaic assembly, the first isolation bar (50) is arranged between the first jumper (3) and the battery cell (401).

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