Photovoltaic module

Abstract

The application relates to the photovoltaic field, and provides a photovoltaic module. The photovoltaic module comprises a first intermediate busbar provided with a first lead-out part; a second intermediate busbar provided with a second lead-out part, the first lead-out part and the second lead-out part being arranged at intervals in a first direction; and a first jumper wire extending in a second direction, at least part of the first jumper wire being overlapped on the first intermediate busbar and being electrically connected with the first intermediate busbar; wherein the first jumper wire is provided with a notch part, the first lead-out part is arranged in the notch part when the first jumper wire is overlapped on the first intermediate busbar; and the first direction intersects the second direction. The notch part can provide a containing space for the first lead-out part, the first lead-out part can move away from the second lead-out part, so that a reasonable distance between the first lead-out part and the second lead-out part can be ensured, the risk of short circuit of the first lead-out part and the second lead-out part due to too close distance can be reduced, and the electrical connection reliability of the photovoltaic module is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of photovoltaic, in particular to a photovoltaic module. BACKGROUND

[0002] Solar energy is inexhaustible and renewable, and a photovoltaic module is a core part of a solar power generation system and the most important part of the solar power generation system. The photovoltaic module converts solar energy into electric energy and sends the electric energy to a storage battery for storage or drives a load to work.

[0003] The photovoltaic module is provided with a junction box and first and second intermediate bus bars connected with the junction box respectively, and the first and second intermediate bus bars have opposite polarities. In the existing photovoltaic module structure, the distance between the lead-out end of the first intermediate bus bar and the lead-out end of the second intermediate bus bar is too close, which easily causes contact short circuit, affecting the normal use of the photovoltaic module. SUMMARY

[0004] Therefore, the present application provides a photovoltaic module to solve the problem that the lead-out end of the first intermediate bus bar and the lead-out end of the second intermediate bus bar are too close to easily cause contact short circuit.

[0005] The present application provides a photovoltaic module, which comprises a first intermediate bus bar provided with a first lead-out part, a second intermediate bus bar provided with a second lead-out part, the first lead-out part and the second lead-out part being spaced apart in a first direction, and a first jumper wire extending in a second direction, at least part of the first jumper wire being overlapped with the first intermediate bus bar and electrically connected with the first intermediate bus bar, wherein the first jumper wire is provided with a notch part, the first lead-out part is arranged in the notch part when the first jumper wire is overlapped with the first intermediate bus bar, and the first direction intersects the second direction.

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

[0007] In a possible implementation, the length of the notch part in the second direction gradually increases in the direction in which the first lead-out part points to the second lead-out part.

[0008] In a possible implementation, the first intermediate bus bar further comprises a first main part, the first main part extends in the first direction, the first jumper wire is overlapped with the first main part, and the first lead-out part is arranged at the end of the first main part; the spacing L1 between the first lead-out part and the side wall of the notch part in the first direction is 1mm-3mm.

[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-out portion is arranged at one end of the second main body portion close to the first lead-out portion.

[0010] In a possible implementation, the second intermediate busbar further includes a second main body portion and a connecting portion, both extending along the first direction; the connecting portion is overlapped on the second main body portion, and is fixedly connected with the second main body portion and the second lead-out portion respectively; and 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 a possible implementation, the connecting portion and the second lead-out portion are in an integrated structure, and along the thickness direction of the connecting portion, the bottom surface of the connecting portion is fixedly connected with the second main body portion; and along the first direction, the second lead-out portion is arranged at one end of the connecting portion close to the first intermediate busbar.

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

[0013] In a possible implementation, along the first direction, the gap between one end of the second main body portion close to the first intermediate busbar and the second lead-out portion is 2 mm to 8 mm.

[0014] In a possible implementation, along the first direction, the gap 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 module further includes a first cell string group and a second cell string group arranged in sequence along a first direction, and further includes a first end busbar, a second end busbar, a third end busbar and a fourth end busbar; along the second direction, two ends of the first cell string group are electrically connected with the first end busbar and the second end busbar respectively, the first cell string group includes a first upper cell string group and a first lower cell string group distributed along the second direction, and the first upper cell string group and the first lower cell string group are connected in parallel through the first intermediate busbar; along the second direction, two ends of the second cell string group are electrically connected with the third end busbar and the fourth end busbar respectively, the second cell string group includes a second upper cell string group and a second lower cell string group distributed along the second direction, and the second upper cell string group and the second lower cell string group are connected in parallel through the second intermediate busbar; two ends of the first jumper along the second direction are electrically connected with the third end busbar and the fourth end busbar respectively.

[0016] In a possible implementation, the first upper cell string group, the first lower cell string group, the second upper cell string group and the second lower cell string group each include a plurality of cell strings, and each of the cell strings includes a plurality of cell pieces connected in series with each other; along the second direction, two adjacent cell pieces are arranged in an overlapping manner.

[0017] In a possible implementation, the photovoltaic module further includes a first isolation strip, and along the thickness direction of the photovoltaic module, the first isolation strip is arranged between the first jumper and the cell piece.

[0018] The beneficial effects of the present application are: by arranging the notch part, a space is provided for the first lead-out part, so that the first lead-out part can move away from the second lead-out part, thereby ensuring that the first lead-out part and the second lead-out part can maintain a reasonable distance, reducing the risk of contact short circuit of the first lead-out part and the second lead-out part due to too close distance. It can also ensure that the distance between the first lead-out part and the second lead-out part meets the opening distance requirement of the first junction box, and improves the electrical connection reliability of the photovoltaic module. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0020] Figure 1 The structural schematic diagram of the photovoltaic module provided by the embodiments of the present application;

[0021] Figure 2 for Figure 1 a circuit diagram of the photovoltaic module in

[0022] Figure 3 for Figure 1 a structural diagram of the battery string in

[0023] Figure 4 for Figure 1 a sectional structural diagram of the photovoltaic module in

[0024] Figure 5 for Figure 1 a structural diagram of the first intermediate busbar, the second intermediate busbar and the first jumper in the first embodiment in

[0025] Figure 6 for Figure 5 a top view of the structure in

[0026] Figure 7 for Figure 6 a partial structural diagram of the first jumper in

[0027] Figure 8 for Figure 1 a structural diagram of the first intermediate busbar, the second intermediate busbar and the first jumper in the second embodiment in

[0028] Figure 9 for Figure 1 a structural diagram of the first intermediate busbar, the second intermediate busbar and the first jumper in the third embodiment in

[0029] Figure 10 for Figure 1 a sectional structural diagram of the photovoltaic module in

[0030] Reference signs:

[0031] 100 - encapsulation layer

[0032] 200 - cover plate

[0033] 10 - first battery string group

[0034] 101 - first upper battery string group

[0035] 102 - first lower battery string group

[0036] 20 - second battery string group

[0037] 201 - second upper battery string group

[0038] 202 - second lower battery string group

[0039] 30 - third battery string group;

[0040] 301 - third upper battery string group;

[0041] 302 - third lower battery string group;

[0042] 40 - battery string;

[0043] 401 - cell;

[0044] 401a - first edge main busbar;

[0045] 401b - second edge main busbar;

[0046] 402 - solder strip;

[0047] 50 - first isolation bar;

[0048] 60 - first bypass diode;

[0049] 70 - second bypass diode;

[0050] 80 - third bypass diode;

[0051] 90 - second isolation bar;

[0052] 1 - first intermediate busbar;

[0053] 11 - first lead-out portion;

[0054] 12 - first main body portion;

[0055] 2 - second intermediate busbar;

[0056] 21 - second lead-out portion;

[0057] 22 - second main body portion;

[0058] 23 - connection portion;

[0059] 3 - first jumper;

[0060] 31 - notch portion;

[0061] 4 - first end busbar;

[0062] 5 - second end busbar;

[0063] 6 - third end busbar;

[0064] 7 - fourth end busbar;

[0065] 8 - second jumper;

[0066] 9 - third intermediate busbar. DETAILED DESCRIPTION

[0067] In order to better understand the technical solutions of the present application, the embodiments of the present application are described in detail below with reference to the drawings.

[0068] It should be clear that the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0069] The terms used in the embodiments of the present application are only for the purpose of describing the specific embodiments, and are not intended to limit the present application. The singular forms "a", "an" and "the" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0070] It should be understood that the term "and / or" used herein is only to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0071] It should be noted that the "up", "down", "left", "right" and other directional words described in the embodiments of the present application are described from the angle shown in the drawings, and should not be understood as limiting the embodiments of the present application. In addition, in the context, it should also be understood that when referring to an element connected to another element "on" or "under", it can not only be directly connected to another element "on" or "under", but also indirectly connected to another element "on" or "under" through an intermediate element.

[0072] The embodiments of the present application provide a photovoltaic module, which comprises a backboard, a front board and a plurality of photovoltaic cells arranged between the backboard and the front board. Figure 1As shown, the photovoltaic module includes the third cell string group 30, the first cell string group 10 and the second cell string group 20 arranged in sequence along the first direction X, and further includes the first intermediate busbar 1, the second intermediate busbar 2, the third intermediate busbar 9, the first end busbar 4, the second end busbar 5, the third end busbar 6 and the fourth end busbar 7. Along the second direction Y, two ends of the third cell string group 30 are electrically connected with the first end busbar 4 and the second end busbar 5 respectively, and the third cell string group 30 includes the third upper cell string group 301 and the third lower cell string group 302 distributed along the second direction Y, and the third upper cell string group 301 and the third lower cell string group 302 are connected in parallel through the third intermediate busbar 9. Along the second direction Y, two ends of the first cell string group 10 are electrically connected with the first end busbar 4 and the second end busbar 5 respectively, and the first cell string group 10 includes the first upper cell string group 101 and the first lower cell string group 102 distributed along the second direction Y, and the first upper cell string group 101 and the first lower cell string group 102 are connected in parallel through the first intermediate busbar 1. Along the second direction Y, two ends of the second cell string group 20 are electrically connected with the third end busbar 6 and the fourth end busbar 7 respectively, and the second cell string group 20 includes the second upper cell string group 201 and the second lower cell string group 202 distributed along the second direction Y, and the second upper cell string group 201 and the second lower cell string group 202 are connected in parallel through the second intermediate busbar 2.

[0073] Each of the first upper cell string group 101, the first lower cell string group 102, the second upper cell string group 201, the second lower cell string group 202, the third upper cell string group 301 and the third lower cell string group 302 includes at least two parallel cell strings 40, and each cell string 40 includes a plurality of cell pieces 401 connected in series. Figure 2 As shown, the polarities between the adjacent cell strings 40 of the third upper cell string group 301 and the first upper cell string group 101 are opposite, and the third upper cell string group 301 and the first upper cell string group 101 are connected in series through the first end busbar 4; the polarities between the adjacent cell strings 40 of the third lower cell string group 302 and the first lower cell string group 102 are opposite, and the third lower cell string group 302 and the first lower cell string group 102 are connected in series through the second end busbar 5.

[0074] It should be noted that the first direction X intersects with the second direction Y, for example, Figure 1 As shown, one of the first direction X and the second direction Y can be the length direction of the photovoltaic module, and the other can be the width direction of the photovoltaic module.

[0075] In some embodiments, as shown in FIG. 2, Figure 3As shown, in the same battery string 40, a plurality of battery pieces 401 are connected in series by a welding strip 402 in turn. Two adjacent battery pieces 401 along the second direction Y are arranged in an overlapping manner, that is, at least part of the two adjacent battery pieces 401 are arranged in the thickness direction Z of the photovoltaic module. When the battery pieces 401 are arranged in this way, the inter-piece spacing between the two adjacent battery pieces 401 can be reduced, more battery pieces 401 can be arranged in a limited area, the blank area of the photovoltaic module layout is reduced, the light receiving area of the photovoltaic module per unit area is increased, thereby improving the power generation per unit area of the photovoltaic module, and further improving the photoelectric conversion efficiency of the photovoltaic module.

[0076] The embodiments of the present application do not limit the type of battery piece 401, which includes but is not limited to a passivated emitter rear cell (PERC), a tunnel oxide passivated contact (TOPCon), a heterojunction with intrinsic thin-film (HJT), an interdigitated back contact (IBC), a heterojunction back contact (HBC), a tunnel oxide back contact (TBC), a perovskite cell, etc.

[0077] For a PERC cell, along its thickness direction, the PERC cell includes a front surface metal silver electrode, a front surface silicon nitride passivation layer, a phosphorus layer emitter, a P-type base silicon layer, a local aluminum back field, a metal aluminum back electrode, and a back passivation layer (Al2O3 / SiNx) in turn. The PERC cell uses a passivation film to passivate the back surface, replaces the full aluminum back field, enhances the internal back reflection of light on the silicon base, reduces the recombination rate of the back surface, and improves the efficiency of the cell by 0.5%-1%.

[0078] For the TOPCon cell, along its thickness direction, the TOPCon cell includes, in sequence, a metal silver electrode, a front surface silicon nitride passivation layer, a boron-doped emitter, an N-type base silicon layer, a diffusion-doped layer, an ultra-thin silicon oxide, a doped polysilicon, a silicon nitride, and a metal silver electrode. The back surface of the cell is composed of an ultra-thin silicon oxide layer (1 nm-2 nm) and a phosphorus-doped microcrystalline-amorphous mixed Si thin film, which together form a passivation contact structure. This structure can block the recombination of minority carriers, and improve the open-circuit voltage and short-circuit current of the cell. The ultra-thin oxide layer allows the tunneling of majority carriers into the polysilicon layer while blocking the recombination of minority carriers. The good passivation effect of the ultra-thin silicon oxide and the heavily doped silicon thin film causes the energy band of the silicon wafer surface to bend, thereby forming a field passivation effect. The probability of electron tunneling is greatly increased, the contact resistance is reduced, and the open-circuit voltage and short-circuit current of the cell are improved, thereby improving the conversion efficiency of the cell.

[0079] For the HJT cell, along its thickness direction, the HJT cell includes, in sequence, a front surface low-temperature silver electrode, a front surface conductive thin film, an N-type amorphous silicon thin film, an intrinsic amorphous silicon thin film, an N-type base silicon layer, an intrinsic amorphous silicon thin film, a P-type amorphous silicon thin film, a back surface conductive thin film, and a back surface low-temperature silver electrode.

[0080] For the IBC cell, along its thickness direction, the IBC cell includes, in sequence, a silicon nitride back 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 metal silver electrode. The IBC cell uses ion implantation technology to obtain P and N regions with good uniformity and accurately controllable junction depth. The cell has no grid line on the front surface, which can eliminate the shading current loss of the metal electrode, maximize the utilization of incident photons, and increase the short-circuit current by about 7% compared with conventional solar cells. Due to the back contact structure, the grid line proportion can be appropriately widened, thereby reducing the series resistance and having a high fill factor. The surface passivation and surface light trapping structure can be optimally designed to obtain a lower front surface recombination rate and surface reflection.

[0081] For the HBC cell, the HBC cell combines the advantages of the IBC cell and the heterojunction cell. The front surface passivation layer of the HBC cell is made of hydrogenated amorphous silicon, and the back surface is deposited with N-type and P-type amorphous silicon thin films to form a heterojunction. The HBC cell fully utilizes the superior surface passivation performance of amorphous silicon, and the heterojunction structure formed on the back surface has good passivation effect, which can simultaneously achieve higher short-circuit current and open-circuit voltage, thereby improving the photoelectric conversion efficiency.

[0082] For TBC cells, TBC cells have the advantages of Topcon's tunneling oxide layer technology and IBC back electrode arrangement, the passivation effect and open circuit voltage are significantly improved, which can realize higher cell conversion efficiency while having economy. The complete production process of TBC cell mainly includes deposition of tunneling oxide layer and P+ polysilicon, deposition of passivation film, printing of electrode on the back of silicon wafer, etc. TBC cell needs to increase the related processes of back electrode such as mask, laser grooving, PN region preparation, etching, etc. on the basis of TOPCon production process. The mask is mainly completed by APCVD or PECVD, the preparation of PN region is mainly completed by PECVD, etching mainly uses traditional wet process equipment, and the grooving process needs to be completed by laser equipment.

[0083] For perovskite cells, along its thickness direction, perovskite cells include substrate material, conductive film, electron transport layer (titanium dioxide), perovskite absorption layer (hole transport layer), and metal cathode. Perovskite material has a high light absorption coefficient and a long carrier diffusion distance. After the absorbed photons are converted into electrons, they are easily collected by the electrode with less loss, so a higher photovoltage and current can be generated, making perovskite exhibit high photoelectric conversion efficiency.

[0084] In addition, the cell sheet 401 can also be a back contact stacked cell, which includes a back contact bottom cell and a perovskite top cell, and the perovskite top cell is electrically connected to the light-receiving surface of the back contact bottom cell. The back contact bottom cell can be one of the IBC cell, HBC, TBC cell described above, and the perovskite top cell is a thin-film solar cell with perovskite material as the light active layer. The structure of the perovskite cell mainly consists of the following key parts: transparent conductive substrate, electron transport layer, perovskite light absorption layer, hole transport layer and 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 absorption layer has excellent light absorption performance, can absorb a wider spectrum range, and effectively convert short-wavelength spectrum, so that the perovskite top cell has high photoelectric conversion efficiency.

[0085] If the cell sheet 401 is one of a PERC cell, a TOPCon cell, a HJT cell or a perovskite cell, when two adjacent cell sheets 401 are electrically connected by a solder strip 402, one end of the solder strip 402 is welded to the grid line on the light-receiving surface of one of the cell sheets 401, and the other end is welded to the grid line on the back surface of the other cell sheet 401. If the cell sheet 401 is one of an IBC cell, an HBC cell, a TBC cell or a back contact stacked cell, when two adjacent cell sheets 401 are electrically connected by a solder strip 402, both ends of the solder strip 402 are welded to the grid lines on the back surfaces of the two cell sheets 401.

[0086] 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. This application embodiment does not limit this.

[0087] In this embodiment, the photovoltaic module further includes a first junction box and a second junction box. A first lead-out portion 11 is provided at one end of the first intermediate busbar 1 and the second intermediate busbar 2, and a second lead-out portion 21 is provided at the end of the second intermediate busbar 2 near the first intermediate busbar 1. The first lead-out portion 11 and the second lead-out portion 21 are spaced apart in a first direction X. The first lead-out portion 11 and the second lead-out portion 21 are used for electrical connection with the first junction box. A third lead-out portion is provided at the end of the third intermediate busbar 9 near the first intermediate busbar 1, and a fourth lead-out portion is provided at the end of the first intermediate busbar 1 near the third intermediate busbar 9. The third lead-out portion and the fourth lead-out portion are used for electrical connection with the second junction box. The first junction box and the second junction box are used for connection with external devices.

[0088] The first lead-out portion 11 and the second lead-out portion 21 can extend perpendicularly to the plane containing the battery cell 401, or they can extend obliquely relative to the plane containing the battery cell 401. That is, the angle between the first lead-out portion 11 and the plane containing the battery cell 401 can be other than 90°, and the angle between the second lead-out portion 21 and the plane containing the battery cell 401 can be other than 90°. The first lead-out portion 11 and the second lead-out portion 21 are preferably arranged parallel to each other.

[0089] Similarly, the third and fourth leads can extend perpendicularly to the plane containing the battery cell 401, or they can extend obliquely relative to the plane containing the battery cell 401. That is, the angle between the third lead and the plane containing the battery cell 401 can be other than 90°, and the angle between the fourth lead and the plane containing the battery cell 401 can be other than 90°. The third and fourth leads are preferably arranged parallel to each other.

[0090] like Figure 1 As shown, the photovoltaic module also 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 cell string group 10 and the second cell string group 20, and the second jumper 8 is located between the third cell string group 30 and the first cell string group 10. The two ends of the first jumper 3 along the second direction Y are electrically connected to the third end busbar 6 and the fourth end busbar 7, respectively. The first jumper 3 is also electrically connected to the first intermediate busbar 1, thereby enabling a series connection between the second cell string group 20 and the first cell string group 10, and further enabling a series connection between the first cell string group 10, the second cell string group 20, and the third cell string group 30. The two ends of the second jumper 8 along the second direction Y are electrically connected to the first end busbar 4 and the second end busbar 5, respectively. Figure 2As shown, the second junction box is provided with a first bypass diode 60 and a second bypass diode 70, the first junction box is provided with a third bypass diode 80, the third battery string group 30 is reversely connected in parallel with the first bypass diode 60 through the second jumper wire 8, the first battery string group 10 is reversely connected in parallel with the second bypass diode 70 through the second jumper wire 8, and the second battery string group 20 is reversely connected in parallel with the third bypass diode 80 through the first jumper wire 3.

[0091] In the embodiment, the second jumper wire 8 electrically connecting the first end busbar 4 and the second end busbar 5 is arranged between the third battery string group 30 and the first battery string group 10, so that the first bypass diode 60 can be reversely connected in parallel with the third battery string group 30 through the second jumper wire 8 (i.e., the first bypass diode 60 is connected in parallel with the third battery string group 30, but the polarity is opposite). When the cell piece 401 on any battery string 40 in the third battery string group 30 is shaded or fails to generate electricity due to hot spot effect, the first bypass diode 60 can form a forward bias to make the current bypass the shaded or failed battery string 40 and flow through the first bypass diode 60, without affecting the normal power generation of other battery strings 40 in the third battery string group 30. Moreover, the first battery string group 10 is reversely connected in parallel with the second bypass diode 70 through the second jumper wire 8 (i.e., the second bypass diode 70 is connected in parallel with the first battery string group 10, but the polarity is opposite). When the cell piece 401 on any battery string 40 in the first battery string group 10 is shaded or fails to generate electricity due to hot spot effect, the second bypass diode 70 can form a forward bias to make the current bypass the shaded or failed battery string 40 and flow through the second bypass diode 70, without affecting the normal power generation of other battery strings 40 in the first battery string group 10. Meanwhile, the second battery string group 20 is reversely connected in parallel with the third bypass diode 80 through the first jumper wire 3 (i.e., the third bypass diode 80 is connected in parallel with the second battery string group 20, but the polarity is opposite). When the cell piece 401 on any battery string 40 in the second battery string group 20 is shaded or fails to generate electricity due to hot spot effect, the third bypass diode 80 can form a forward bias to make the current bypass the shaded or failed battery string 40 and flow through the third bypass diode 80, without affecting the normal power generation of other battery strings 40 in the second battery string group 20.

[0092] In some embodiments, the first jumper wire 3 and the second jumper wire 8 are conductors made of conductive materials, which can be conductive metal strips.

[0093] In some embodiments, the first jumper wire 3 and the second jumper wire 8 are conductors made of conductive materials, which can be conductive metal strips. Figure 4As shown, the width W2 of the first jumper wire 3 is 5mm-10mm, and the thickness H1 of the first jumper wire 3 is 0.1mm-0.3mm. When W2 and H1 respectively meet the above ranges, the first jumper wire 3 can achieve the effect of being wide and thin, and when the width W2 of the first jumper wire 3 is larger, it is beneficial to increase the cross-sectional area of the first jumper wire 3, thereby reducing the resistance of the first jumper wire 3; when the thickness H1 of the first jumper wire 3 is thinner, it can avoid that the first jumper wire 3 exerts excessive stress on the edge of the battery piece 401 in the lamination process, thereby reducing the risk of hidden cracking of the battery piece 401.

[0094] Optionally, the width W2 of the first jumper wire 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, and can also be other values within the above range, which are not limited by the embodiments of the present application.

[0095] Optionally, the width W2 of the first jumper wire 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, and can also be other values within the above range, which are not limited by the embodiments of the present application.

[0096] Optionally, the thickness H1 of the first jumper wire 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, and can also be other values within the above range, which are not limited by the embodiments of the present application.

[0097] Optionally, the thickness H1 of the first jumper wire 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, and can also be other values within the above range, which are not limited by the embodiments of the present application.

[0098] As shown in FIG. 4, the first jumper wire 3 is arranged on the first surface 4011 of the battery piece 401, and the second jumper wire 4 is arranged on the second surface 4012 of the battery piece 401.Figure 4 As shown, the inter-string spacing between the first battery string group 10 and the second battery string group 20 is W3, and the width W2 of the first jumper wire 3 is greater than W3, that is, at least part of the first jumper wire 3 will overlap the battery piece 401 of the first battery string group 10 and the battery piece 401 of the second battery string group 20. In order to avoid the first jumper wire 3 contacting the battery piece 401 in the first battery string group 10 or the battery piece 401 in the second battery string group 20 to cause short circuit, a first isolation strip 50 is further arranged between the first jumper wire 3 and the battery piece 401, and the first isolation strip 50 is made of insulating material. In the thickness direction Z of the photovoltaic module, the two surfaces of the first isolation strip 50 can be respectively bonded and fixed with the first jumper wire 3 and the battery piece 401.

[0099] In some embodiments, as shown in Figure 4 The thickness H2 of the first isolation strip 50 is greater than or equal to 150 μm. The first isolation strip 50 plays an insulating role between the first jumper wire 3 and the battery piece 401, and the insulating performance of the first isolation strip 50 decreases as the thickness H2 of the first isolation strip 50 decreases. If the thickness H2 of the first isolation strip 50 is less than 150 μm, the insulating performance of the first isolation strip 50 is poor, and the possibility of short circuit between the first jumper wire 3 and the battery piece 401 is greater. Therefore, when the thickness H2 of the first isolation strip 50 satisfies the above range, the insulating effect between the first jumper wire 3 and the battery piece 401 can be ensured. However, the thickness H2 of the first isolation strip 50 should not be too large, so as to avoid the first isolation strip 50 exerting excessive stress on the edge of the battery piece 401 during the lamination process.

[0100] 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 in the above range, which are not limited in the embodiments of the present application.

[0101] In some embodiments, as shown in Figure 4 As shown, along the width direction of the first jumper wire 3, the spacing W4 between one end of the first jumper wire 3 and the end of the first isolation strip 50 is 2 mm to 3 mm, and the spacing W5 between the other end of the first jumper wire 3 and the other end of the first isolation strip 50 is 2 mm to 3 mm, that is, the two sides of the first isolation strip 50 are respectively wider than the first jumper wire 3 by 2 mm to 3 mm, so as to reduce the risk of the first jumper wire 3 contacting the battery piece 401 due to deviation and causing short circuit, and facilitate improving the insulating effect between the first jumper wire 3 and the battery piece 401.

[0102] Optionally, W4 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 or 3 mm, or other values in the above range, which are not limited in the embodiments of the present application.

[0103] Similarly, W5 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 or 3 mm, or other values within the above range, which are not limited in the embodiments of the present application.

[0104] W4 and W5 can be equal or not equal.

[0105] In some embodiments, the cell piece 401 of the battery string 40 close to the second battery string group 20 in the first battery string group 10 has a first edge main grid 401a, and the cell piece 401 of the battery string 40 close to the first battery string group 10 in the second battery string group 20 has a second edge main grid 401b. Wherein, along the width direction of the first isolation strip 50, the distance W6 between the edge of the first isolation strip 50 and the first edge main grid 401a is greater than 3 mm, and the distance W7 between the edge of the first isolation strip 50 and the second edge main grid 401b is greater than 3 mm. Since high-temperature tape is needed for pre-fixing between the first jumper 3, the first isolation strip 50 and the battery string 40, when W6 and W7 are greater than 3 mm respectively, it can be ensured that the high-temperature tape will not be pasted on the first edge main grid 401a and the second edge main grid 401b, and will not be pasted on the solder strip connected with the first edge main grid 401a and the second edge main grid 401b, thereby avoiding the generation of bubbles in the laminating process of the photovoltaic module.

[0106] Optionally, W6 can be 3.1 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, 5.5 mm or 6 mm, or other values within the above range, which are not limited in the embodiments of the present application.

[0107] Similarly, W7 can be 3.1 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, 5.5 mm or 6 mm, or other values within the above range, which are not limited in the embodiments of the present application.

[0108] W6 and W7 can be equal or not equal.

[0109] In some embodiments, the second jumper 8 and the cell piece 401 of the third battery string group 30, the cell piece 401 of the first battery string group 10 are also provided with a second isolation strip 90, and the second isolation strip 90 is made of insulating material. Along the thickness direction Z of the photovoltaic module, the two surfaces of the second isolation strip 90 can be respectively bonded and fixed with the second jumper 8 and the cell piece 401.

[0110] 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 piece 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 requirement between the end of the first isolation strip 50 and the first edge main grid 401a, the end of the first isolation strip 50 and the second edge main grid 401b described above, which will not be repeated here.

[0111] In the embodiments of the present application, as shown in Figure 5 At least part of the first jumper 3 is overlapped on the first intermediate bus bar 1 to form an electrical connection with the first intermediate bus bar 1. When the width W2 of the first jumper 3 is large, the first lead-out portion 11 needs to be close to the direction of the second lead-out portion 21 to accommodate the first jumper 3, which will cause the distance between the first lead-out portion 11 and the second lead-out portion 21 to be too close, not meeting the hole spacing requirement of the first junction box, and there is also a risk of mutual short circuit when the distance between the first lead-out portion 11 and the second lead-out portion 21 is too close.

[0112] In order to avoid the distance between the first lead-out portion 11 and the second lead-out portion 21 being too close, the structure of the first jumper 3, the first intermediate bus bar 1 and the second intermediate bus bar 2 is improved in the embodiments of the present application, which will be described in detail below in conjunction with the drawings.

[0113] As shown in Figure 5 The first jumper 3 is provided with a notch portion 31, and the first lead-out portion 11 is arranged in the notch portion 31 when the first jumper 3 is overlapped on the first intermediate bus bar 1. By providing the notch portion 31, a space is provided for the first lead-out portion 11, so that the first lead-out portion 11 can move away from the second lead-out portion 21, thereby ensuring that the distance between the first lead-out portion 11 and the second lead-out portion 21 can be kept reasonable, reducing the risk of contact short circuit between the first lead-out portion 11 and the second lead-out portion 21 due to the distance being too close. It can also ensure that the distance between the first lead-out portion 11 and the second lead-out portion 21 meets the hole distance requirement of the first junction box, improving the electrical connection reliability of the photovoltaic module.

[0114] In some embodiments, as shown in Figure 6 and Figure 7As shown, the width W1 of the notch portion 31 is 3mm-6mm along the first direction X. When the width W1 of the notch portion 31 meets the above range, on the one hand, the notch portion 31 can provide sufficient accommodation space for the first lead-out portion 11, so as to ensure that the spacing between the first lead-out portion 11 and the second lead-out portion 21 meets the opening spacing requirement of the terminal box; on the other hand, the width of the notch portion 31 is not too large, so as to ensure that the first jumper 3 has sufficient welding area between the remaining part and the first intermediate busbar 1, and meanwhile, the structure strength of the first jumper 3 is not affected due to the notch portion 31 being too wide, and the first jumper 3 is prevented from being broken due to the notch portion 31.

[0115] Optionally, the width W1 of the notch portion 31 is 3mm-4.5mm, and W1 can be 3mm, 3.1mm, 3.2mm, 3.3mm, 3.4mm, 3.5mm, 3.6mm, 3.7mm, 3.8mm, 3.9mm, 4mm, 4.1mm, 4.2mm, 4.3mm, 4.4mm or 4.5mm, or other values within the above range, which are not limited in the embodiments of the present application.

[0116] Optionally, the width W1 of the notch portion 31 is 4.5mm-6mm, and W1 can be 4.5mm, 4.6mm, 4.7mm, 4.8mm, 4.9mm, 5mm, 5.1mm, 5.2mm, 5.3mm, 5.4mm, 5.5mm, 5.6mm, 5.7mm, 5.8mm, 5.9mm or 6mm, or other values within the above range, which are not limited in the embodiments of the present application.

[0117] In some embodiments, as shown in Figs. 1 and 2, the length of the notch portion 31 along the second direction Y gradually increases in the direction in which the first lead-out portion 11 points to the second lead-out portion 21, that is, the notch portion 31 has a trapezoidal structure, and the length of the opening end of the notch portion 31 is large, so as to facilitate the placement of the first lead-out portion 11 in the notch portion 31 and reduce the assembly difficulty. Figure 6 and Figure 7 In some embodiments, as shown in Figs. 1 and 2, the length of the notch portion 31 along the second direction Y gradually increases in the direction in which the first lead-out portion 11 points to the second lead-out portion 21, that is, the notch portion 31 has a trapezoidal structure, and the length of the opening end of the notch portion 31 is large, so as to facilitate the placement of the first lead-out portion 11 in the notch portion 31 and reduce the assembly difficulty.

[0118] In some embodiments, the spacing L1 between the first lead-out portion 11 and the side wall of the notch portion 31 is 1mm-3mm along the first direction X. When the spacing L1 is reserved between the first lead-out portion 11 and the side wall of the notch portion 31, the first jumper 3 and the first main body portion 12 can be welded, which is beneficial to reduce the production difficulty of the photovoltaic module.

[0119] Optionally, the spacing L1 between the first lead-out portion 11 and the side wall of the notch portion 31 can be 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 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, or 3 mm, and can also be other values within the above range, which is not limited in the embodiments of the present application.

[0120] In some embodiments, as shown in Figure 5 and Figure 6 The first intermediate busbar 1 further includes a first main body portion 12 extending along the first direction X for electrical connection with the first upper battery string group 101 and the first lower battery string group 102. The first jumper wire 3 is lapped on the surface of the first main body portion 12, and the first lead-out portion 11 is arranged at the end of the first main body portion 12. The first lead-out portion 11 and the first main body portion 12 can be an integral structure, and the first lead-out portion 11 is formed by bending. Alternatively, the first lead-out portion 11 and the first main body portion 12 can be a split structure, and are fixedly connected together by welding and form an electrical connection.

[0121] In some embodiments, as shown in Figure 5 The second intermediate busbar 2 further includes a second main body portion 22 extending along the first direction X for electrical connection with the second upper battery string group 201 and the second lower battery string group 202. Along the first direction X, the second lead-out portion 21 is arranged at one end of the second main body portion 22 close to the first lead-out portion 11. The second lead-out portion 21 and the second main body portion 22 can be an integral structure, and the second lead-out portion 21 is formed by bending. Alternatively, the second lead-out portion 21 and the second main body portion 22 can be a split structure, and are fixedly connected together by welding and form an electrical connection.

[0122] In other embodiments, the structure of the second intermediate busbar 2 can also be improved to further increase the spacing between the first lead-out portion 11 and the second lead-out portion 21. As shown in Figure 8As shown, the second intermediate busbar 2 further comprises a connecting portion 23, the second main portion 22 and the connecting portion 23 both extend along the first direction X, the connecting portion 23 is overlapped on the surface of the second main portion 22, and both ends of the connecting portion 23 are fixedly connected with the second main portion 22 and the second lead-out portion 21 respectively. And along the first direction X, there is a gap between the one end of the second main portion 22 close to the first intermediate busbar 1 and the second lead-out portion 21, that is, by arranging the connecting portion 23, the position of the second lead-out portion 21 can be moved away from the first lead-out portion 11, so as to ensure that the first lead-out portion 11 and the second lead-out portion 21 can maintain a reasonable distance, and further reduce the risk of contact short circuit of the first lead-out portion 11 and the second lead-out portion 21 due to too close distance.

[0123] In the embodiment, as shown in the figure, Figure 8 As shown, along the first direction X, the distance L2 between the one end of the second main portion 22 close to the first intermediate busbar 1 and the second lead-out portion 21 is 2mm~8mm, 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 contact short circuit of the second lead-out portion 21 and the first lead-out portion 11, nor cause the inconvenience of connecting the second lead-out portion 21 and the first junction box due to too far distance.

[0124] Optionally, the distance L2 between the one end of the second main portion 22 close to the first intermediate busbar 1 and the second lead-out portion 21 is 2mm~5mm, and L2 can be 2mm, 2.2mm, 2.4mm, 2.5mm, 2.6mm, 2.8mm, 3mm, 3.2mm, 3.4mm, 3.5mm, 3.6mm, 3.8mm, 4mm, 4.2mm, 4.4mm, 4.5mm, 4.6mm, 4.8mm, 5mm, or other values within the above range, which are not limited in the embodiment of the present application.

[0125] Optionally, the distance L2 between the one end of the second main portion 22 close to the first intermediate busbar 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 are not limited in the embodiment of the present application.

[0126] In an embodiment, as shown in the figure, Figure 8As shown, the connecting portion 23 can be specifically integrated with the second leading-out portion 21, and the second leading-out portion 21 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 with the second main body portion 22, so as to fixedly connect the second main body portion 22 with the second leading-out portion 21 and form an electrical connection. Along the first direction X, the second leading-out portion 21 can be arranged at one end of the connecting portion 23 close to the first intermediate busbar 1, or arranged at one end of the connecting portion 23 away from the first intermediate busbar 1. When the second leading-out portion 21 is arranged at one end of the connecting portion 23 close to the first intermediate busbar 1, the connecting portion 23 will not hinder the second leading-out portion 21 when the second leading-out portion 21 is close to the first leading-out portion 11, and it is more convenient to adjust the bending angle of the second leading-out portion 21 relative to the first connecting portion 23, so that the flexibility of the second leading-out portion 21 is higher.

[0127] In another embodiment, as shown in Figure 9 the second main body portion 22, the connecting portion 23 and the second leading-out portion 21 are integrated as a whole, the connecting portion 23 and the second leading-out portion 21 are both formed by bending, and the structure of the second intermediate busbar 2 is obtained by twice bending the second main body portion 22. Along the first direction X, one end of the connecting portion 23 is arranged at one end of the second main body portion 22 close to the first intermediate busbar 1, and the second leading-out portion 21 is arranged at one end of the connecting portion 23 away from the first intermediate busbar 1, so as to ensure that the second leading-out portion 21 can be away from the first leading-out portion 11. When the second main body portion 22, the connecting portion 23 and the second leading-out portion 21 are arranged as an integrated structure, the positional relationship between the connecting portion 23 and the second leading-out portion 21 relative to the second main body portion 22 can be changed by adjusting the bending position, so as to adjust the position of the second leading-out portion 21 according to the size of the first terminal box and the position of the first jumper 3 and the first leading-out portion 11, so that the flexibility of the second leading-out portion 21 is higher.

[0128] In the above embodiments, as shown in Figure 6 the distance L3 between the second main body portion 22 and the first leading-out portion 11 along the first direction X is 2mm~10mm, and when L3 satisfies the above range, the risk of lap joint short circuit between the first leading-out portion 11 and the second main body portion 22 can be reduced, so as to further improve the electrical reliability of the photovoltaic module.

[0129] Optionally, the distance L3 between the second main body part 22 and the first lead-out part 11 is 2mm-5mm, L3 can be 2mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3mm, 3.1mm, 3.2mm, 3.3mm, 3.4mm, 3.5mm, 3.6mm, 3.7mm, 3.8mm, 3.9mm, 4mm, 4.1mm, 4.2mm, 4.3mm, 4.4mm, 4.5mm, 4.6mm, 4.7mm, 4.8mm, 4.9mm or 5mm, and can also be other values within the above range, which is not limited in the embodiments of the present application.

[0130] Optionally, the distance L3 between the second main body part 22 and the first lead-out part 11 is 5mm-8mm, 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, and can also be other values within the above range, which is not limited in the embodiments of the present application.

[0131] Optionally, the distance L3 between the second main body part 22 and the first lead-out part 11 is 8mm-10mm, 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, and can also be other values within the above range, which is not limited in the embodiments of the present application.

[0132] In the above embodiments, as shown in the drawings, Figure 6 the distance L5 between the second main body part 22 and the first jumper 3 is greater than or equal to 2mm, and when L5 satisfies the above range, the risk of short circuit caused by the first jumper 3 and the second main body part 22 can be reduced, thereby further improving the electrical reliability of the photovoltaic module.

[0133] Optionally, the distance L5 between the second main body 22 and the first jumper 3 is 2.1 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, 5.5 mm, 6 mm, 6.5 mm, or 7 mm, or other values within the above range, which are not limited in the embodiments of the present application.

[0134] In the above embodiments, as shown in Figure 6 the first direction X, the length L6 of the distance by which the second main body 22 exceeds the second edge main grid 401b is 1 mm~3 mm, which can increase the welding connection area between the second main body 22 and the solder strip 402 on the second edge main grid 401b, so as to ensure that the second intermediate busbar 2 can form reliable connection with the solder strip 402.

[0135] Optionally, the length L6 of the distance by which the second main body 22 exceeds the second edge main grid 401b can be 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 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, or 3 mm, or other values within the above range, which are not limited in the embodiments of the present application.

[0136] The photovoltaic module structure provided by the embodiments ensures that the distance between the first lead-out part 11 and the second lead-out part 21 can meet the range of 5 mm~15 mm, so as to adapt to the opening distance requirement of the first junction box.

[0137] As shown in Figure 10 the photovoltaic module provided by the embodiments 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-receiving surface and the back surface of the cell string 40, and the cover plate 200 is used to cover the surface of 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 sheet 401 and the solder strip 402, so as to prevent the external environment from affecting the performance of the cell sheet 401 and the solder strip 402, and meanwhile, the cover plate 200, the cell sheet 401 and the solder strip 402 can be bonded into an integral whole.

[0138] The material of the cover plate 200 can be one of tempered glass, polyethylene terephthalate (PET), polycarbonate (PC), etc. rigid material or one of polyvinyl fluoride (PVF), ethylene-tetra-fluoro-ethylene (ETFE), polyvinylidene fluoride (PVDF), etc. flexible material. The encapsulation layer 100 is a film, and the material of the film can be one of ethylene-vinyl acetate copolymer (EVA), polyolefin elastomer (POE), polyvinyl butyral (PVB), etc. The encapsulation layer 100 can also be an EPE film (EVA-POE-EVA co-extrusion structure) or an EP film (EVA-POE co-extrusion structure).

[0139] The preferred embodiments of the present application have been described above with the preferred embodiments, but the present application is not limited to the above examples. It will be appreciated by those skilled in the art that the present application can be variously changed and modified. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of the present application.

Claims

1. A photovoltaic module, characterized by, The utility model relates to a battery cell busbar structure, including: The first intermediate busbar (1) is provided with the first outgoing portion (11); The second intermediate busbar (2) is provided with the second outgoing portion (21), the second main body portion (22) and the connecting portion (23), the second main body portion (22) and the connecting portion (23) all extend along the first direction, the connecting portion (23) is overlapped on the second main body portion (22), the connecting portion (23) is fixedly connected with the second main body portion (22) and the second outgoing portion (21) respectively, and there is a spacing between the second main body portion (22) and the second outgoing portion (21) along the first direction close to one end of the first intermediate busbar (1); The first jumper wire (3) extends along the second direction, and at least part of the first jumper wire (3) is overlapped on the first intermediate busbar (1) and is electrically connected with the first intermediate busbar (1); Wherein, the first outgoing portion (11) and the second outgoing portion (21) are spaced apart in the first direction; The first jumper wire (3) is provided with a notch portion (31), and when the first jumper wire (3) is overlapped on the first intermediate busbar (1), the first outgoing portion (11) is arranged in the notch portion (31); The first direction intersects with the second direction.

2. The photovoltaic module of claim 1, wherein, Along the first direction, the width W1 of the notch portion (31) is 3mm~6mm.

3. The photovoltaic module of claim 1, wherein, Along the direction of the first outgoing portion (11) pointing to the second outgoing portion (21), the length of the notch portion (31) in the second direction gradually increases.

4. The photovoltaic module of claim 1, wherein, The first intermediate busbar (1) further includes a first main body portion (12), the first main body portion (12) extends along the first direction, the first jumper wire (3) is overlapped on the first main body portion (12), and the first outgoing portion (11) is arranged at the end of the first main body portion (12); Along the first direction, the spacing L1 between the first outgoing portion (11) and the side wall of the notch portion (31) is 1mm~3mm.

5. The photovoltaic module of claim 1, wherein, The connecting portion (23) and the second outgoing portion (21) are an integral structure, and along the thickness direction of the connecting portion (23), the bottom surface of the connecting portion (23) is fixedly connected with the second main body portion (22); Along the first direction, the second outgoing portion (21) is arranged at one end of the connecting portion (23) close to the first intermediate busbar (1).

6. The photovoltaic module of claim 1, wherein, The second main body portion (22), the connecting portion (23) and the second outgoing portion (21) are an integral 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 busbar (1); The second outgoing portion (21) is arranged at one end of the connecting portion (23) away from the first intermediate busbar (1).

7. The photovoltaic module of claim 1, wherein, Along the first direction, the spacing L2 between one end of the second main body portion (22) close to the first intermediate busbar (1) and the second outgoing portion (21) is 2mm~8mm.

8. The photovoltaic module of claim 1, wherein, The distance L3 between the second main body part (22) and the first lead-out part (11) in the first direction is 2-10 mm.

9. The photovoltaic module of claim 1, wherein, The photovoltaic module further comprises a first cell string group (10) and a second cell string group (20) arranged in sequence in a first direction, and further comprises a first end busbar (4), a second end busbar (5), a third end busbar (6), and a fourth end busbar (7); In the second direction, two ends of the first cell string group (10) are electrically connected to the first end busbar (4) and the second end busbar (5) respectively, the first cell string group (10) comprises a first upper cell string group (101) and a first lower cell string group (102) distributed in the second direction, and the first upper cell string group (101) and the first lower cell string group (102) are connected in parallel through the first intermediate busbar (1); In the second direction, two ends of the second cell string group (20) are electrically connected to the third end busbar (6) and the fourth end busbar (7) respectively, the second cell string group (20) comprises a second upper cell string group (201) and a second lower cell string group (202) distributed in the second direction, and the second upper cell string group (201) and the second lower cell string group (202) are connected in parallel through the second intermediate busbar (2); The two ends of the first jumper (3) in the second direction are electrically connected to the third end busbar (6) and the fourth end busbar (7) respectively.

10. The photovoltaic module of claim 9, wherein, The first upper cell string group (101), the first lower cell string group (102), the second upper cell string group (201), and the second lower cell string group (202) each comprise a plurality of cell strings (40), and the cell string (40) comprises a plurality of cell pieces (401) connected in series with each other. In the second direction, two adjacent cell pieces (401) are arranged in an overlapping manner.

11. The photovoltaic module of claim 10, wherein, The photovoltaic module further comprises a first isolation strip (50), and the first isolation strip (50) is arranged between the first jumper (3) and the cell piece (401) in the thickness direction of the photovoltaic module.

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