Multi-slice photovoltaic module

Abstract

The utility model relates to the technical field of solar energy, disclose a multi slice photovoltaic module, include: by the cutting of cell piece formed two pieces of edge piece and at least one piece of middle piece, a plurality of pieces of edge piece along the first cell string that connects in turn is formed, a plurality of pieces of middle piece connects in turn and forms second cell string, first module unit includes two first cell strings and at least one second cell string that are arranged in parallel, the multi slice photovoltaic module includes a plurality of series connection first module units, a plurality of first module units are sequentially arranged along the second direction, and the edge of adjacent first module unit is overlapped and set, and the multi slice photovoltaic module still includes insulating strip, and the insulating strip is connected between adjacent first module unit and is set to corresponding overlapping position. The utility model makes a plurality of pieces of edge piece string welding and forms the first cell string, makes a plurality of pieces of middle piece string welding and forms the second cell string, to separate the edge piece and middle piece, can reduce the mismatch problem caused by the inconsistent efficiency, improves the power of photovoltaic module.

Description

Technical Field

[0001] This utility model relates to the field of solar energy technology, specifically to multi-slice photovoltaic modules. Background Technology

[0002] With the widespread application of solar energy, the solar photovoltaic panel industry has also flourished. Traditional solar panel production involves welding multiple cells into strings using solder strips, due to the structural characteristics of the cells, before assembling the strings with other components. Currently, mainstream multi-slice technologies include three-slice and four-slice solutions. However, the cutting losses of both heterojunction and TOPCon high-efficiency cells are significant, and multi-slice technology exacerbates these losses, affecting the power output of the photovoltaic module. Utility Model Content

[0003] In view of this, the present invention provides a multi-slice photovoltaic module to solve the problem of low power in existing multi-slice photovoltaic modules.

[0004] In a first aspect, this utility model provides a multi-slice photovoltaic module, comprising: two edge slices and at least one middle slice formed by cutting solar cells, wherein a plurality of the edge slices are sequentially connected along a first direction to form a first battery string, and a plurality of the middle slices are sequentially connected along the first direction to form a second battery string; a first module unit, comprising two first battery strings and at least one second battery string arranged in parallel; the multi-slice photovoltaic module comprises a plurality of first module units arranged in series, the plurality of first module units are arranged sequentially along a second direction, and the edges of adjacent first module units overlap; the multi-slice photovoltaic module further comprises an insulating strip, the insulating strip being connected between adjacent first module units and arranged at corresponding overlapping positions.

[0005] In one optional implementation, along the second direction, the overlap width of adjacent first module units is a, satisfying 0.2mm≤a≤1mm.

[0006] In one alternative embodiment, the width of the insulating strip along the second direction is b, which satisfies 6mm ≤ b ≤ 20mm.

[0007] In one optional embodiment, the insulating strip includes an insulating layer and an adhesive layer, with the adhesive layer disposed on both opposite sides of the insulating layer, and the adhesive layer being connected to the first module unit.

[0008] In one alternative embodiment, the multi-slice photovoltaic module further includes a busbar disposed between the first module unit and the insulating strip.

[0009] In one alternative implementation, in a first battery string, two adjacent edge pieces are overlapped, each edge piece includes a non-cut surface and a cut surface disposed opposite to each other along a first direction, and the non-cut surface of one edge piece is located below the adjacent edge piece; In one of the second battery strings, two adjacent intermediate sheets are overlapped, and each intermediate sheet includes two cut surfaces arranged opposite each other along a first direction.

[0010] In one optional implementation, along the first direction, the overlap width of two adjacent edge pieces is c, satisfying 0.4mm≤c≤1.5mm; Along the first direction, the overlap width of two adjacent intermediate pieces is d, which satisfies 0.4mm≤d≤1.5mm.

[0011] In one optional implementation, in one of the first module units, the two battery strings along the first direction are respectively a first battery string and a second battery string, and the two battery strings along the second direction are either both first battery strings or both second battery strings; or, In one of the first module units, the two battery strings along the first direction are respectively the first battery string and the second battery string, and the two battery strings along the second direction are respectively the first battery string and the second battery string; and / or, In one of the first module units, the edges of two adjacent battery strings are overlapped along the second direction.

[0012] Secondly, this utility model also provides a multi-slice photovoltaic module, comprising: two edge slices and at least one middle slice formed by cutting solar cells, wherein a plurality of the edge slices are sequentially connected along a first direction to form a first battery string, and a plurality of the middle slices are sequentially connected along the first direction to form a second battery string; a second module unit, comprising at least two first battery strings arranged in parallel; the multi-slice photovoltaic module comprises a plurality of second module units arranged in series, the plurality of second module units are arranged sequentially along a second direction, and the edges of adjacent second module units overlap; the multi-slice photovoltaic module further comprises an insulating strip, the insulating strip being connected between adjacent second module units and arranged at corresponding overlapping positions.

[0013] Thirdly, this utility model also provides a multi-slice photovoltaic module, comprising: two edge slices and at least one middle slice formed by cutting solar cells, wherein a plurality of the edge slices are sequentially connected along a first direction to form a first battery string, and a plurality of the middle slices are sequentially connected along the first direction to form a second battery string; a third module unit, comprising at least two second battery strings arranged in parallel; the multi-slice photovoltaic module comprises a plurality of the third module units arranged in series, the plurality of the third module units are arranged sequentially along a second direction, and the edges of adjacent third module units overlap; the multi-slice photovoltaic module further comprises an insulating strip, the insulating strip being connected between adjacent third module units and arranged at corresponding overlapping positions.

[0014] The technical solution of this application has the following advantages: Cutting a single solar cell into smaller pieces creates two edge pieces and at least one intermediate piece between the two edge pieces. This results in at least three smaller pieces, producing two types of pieces: edge pieces and intermediate pieces with different efficiencies. Therefore, several edge pieces are wired together to form a first battery string, and several intermediate pieces are wired together to form a second battery string, separating the edge and intermediate pieces. The first and second battery strings can be connected in parallel, or they can be used to assemble two different types of photovoltaic modules. This reduces mismatch issues caused by efficiency inconsistencies and increases the power output of the photovoltaic modules. Furthermore, overlapping the edges of adjacent module units increases the effective area of ​​the cells within the module, further improving the module's power. Insulating strips are used to connect adjacent module units at the overlapping locations. These insulating strips not only provide insulation but also serve a connecting function, simplifying the overall structure and manufacturing process. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of a battery cell cut into four small pieces according to an embodiment of the present invention; Figure 2 This is a schematic diagram of a battery cell cut into three small pieces according to an embodiment of the present invention; Figure 3 This is a schematic diagram of a first battery string according to an embodiment of the present utility model; Figure 4This is a schematic diagram of a second battery string according to an embodiment of the present utility model; Figure 5 This is a schematic diagram of a first module unit according to an embodiment of the present utility model; Figure 6 for Figure 5 A schematic diagram of a photovoltaic module formed by combining the first module units shown; Figure 7 This is a schematic diagram of another first module unit according to an embodiment of the present utility model; Figure 8 for Figure 7 A schematic diagram of a photovoltaic module formed by combining the first module units shown; Figure 9 This is a schematic diagram of a second module unit according to an embodiment of the present utility model; Figure 10 for Figure 9 A schematic diagram of a photovoltaic module formed by combining the second module units is shown. Figure 11 This is a schematic diagram of a third module unit according to an embodiment of the present utility model; Figure 12 for Figure 11 A schematic diagram of a photovoltaic module formed by combining the third module units is shown. Figure 13 This is a circuit diagram of the four-slice assembly according to an embodiment of the present invention; Figure 14 This is a circuit diagram of the three-slice assembly according to an embodiment of the present invention; Figure 15 for Figure 6 The diagram shows an insulating strip installed between the first module units. Figure 16 This is a schematic diagram of the stacked battery string according to an embodiment of the present invention; Figure 17 This is a schematic diagram of the structure of the insulating strip according to an embodiment of the present utility model.

[0017] Explanation of reference numerals in the attached figures: 1. Solar cell; 11. Edge sheet; 12. Middle sheet; 13. Uncut surface; 14. Cut surface; 10. First battery string; 20. Second battery string; 100, First module unit; 200, Second module unit; 300, Third module unit; 400, Insulating strip; 410, Insulating layer; 420, Adhesive layer; 500, Busbar. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0019] The following is combined Figures 1 to 17 The following describes embodiments of the present invention.

[0020] like Figures 1 to 4 As shown, the multi-slice photovoltaic module includes: two edge slices 11 and at least one middle slice 12 formed by cutting the cell 1, a number of edge slices 11 are connected in sequence along a first direction to form a first cell string 10, and a number of middle slices 12 are connected in sequence along the first direction to form a second cell string 20.

[0021] A multi-slice photovoltaic module includes a first module unit 100. For example... Figure 5 and Figure 7 As shown, the first module unit 100 includes two first battery strings 10 and at least one second battery string 20 arranged in parallel.

[0022] Another type of multi-slice photovoltaic module includes a second module unit 200. For example... Figure 9 As shown, the second module unit 200 includes at least two first battery strings 10 arranged in parallel.

[0023] In another type of multi-slice photovoltaic module, a third module unit 300 is included. For example... Figure 11 As shown, the third module unit 300 includes at least two second battery strings 20 arranged in parallel.

[0024] In the multi-slice photovoltaic module of this embodiment, after the whole cell 1 is cut into small slices, two edge slices 11 and at least one middle slice 12 located between the two edge slices 11 are formed. That is, the whole cell 1 is cut into at least three small slices, and two types of small slices are generated. The edge slices 11 and the middle slices 12 have different efficiencies. Therefore, several edge slices 11 are wired together to form a first cell string 10, and several middle slices 12 are wired together to form a second cell string 20, so as to separate the edge slices 11 and the middle slices 12. Furthermore, the first cell string 10 and the second cell string 20 are set in parallel, or the first cell string 10 and the second cell string 20 are used to assemble two different photovoltaic modules respectively, thereby reducing the mismatch problem caused by efficiency inconsistency and improving the power of the photovoltaic module.

[0025] It is worth noting that, such as Figure 1 and Figure 2 As shown, the edge sheet 11 has only one side cut surface 14, while the middle sheet 12 has cut surfaces 14 on both sides. After the battery cell 1 is cut, the passivation deteriorates, leading to a decrease in efficiency; the more cut surfaces 14 there are, the greater the impact on efficiency. Therefore, the edge sheet 11 has a higher efficiency than the middle sheet 12. In related technologies, edge passivation of the cut surfaces 14 can reduce cutting losses, thereby recovering the efficiency loss caused by cutting losses to some extent; however, due to the limitations of passivation, it cannot completely recover the cutting losses. Therefore, even after edge passivation, the efficiency of the edge sheet 11 is still higher than that of the middle sheet 12.

[0026] It is understandable that passivation technology refers to the process of passivating the cut edges of a battery to reduce the impact on battery efficiency caused by severe edge recombination and decreased passivation effect due to cutting. Currently, passivation technologies include: (i) Atomic Layer Deposition (ALD) passivation, which uses materials such as Al2O3 to deposit an ultrathin passivation layer (1-10nm) and achieves monolayer control through chemical adsorption; (ii) Thermal Laser Separation (TLS) assisted passivation, which achieves a surface roughness of <1μm after cutting and can reduce the edge recombination rate by more than 40% when combined with ALD passivation; and (iii) Plasma Enhanced Chemical Vapor Deposition (PECVD) passivation, which deposits SiNx thin films (80-120nm thick) and has both passivation and anti-reflection functions.

[0027] The following describes various multi-slice photovoltaic modules through multiple embodiments.

[0028] Example 1 According to an embodiment of this utility model, a multi-slice photovoltaic module is provided, such as... Figures 5 to 8 As shown, the multi-slice photovoltaic module includes several first module units 100 connected in series. The several first module units 100 are arranged sequentially along the second direction, and the edges of adjacent first module units 100 overlap. The multi-slice photovoltaic module also includes an insulating strip 400, which is connected between adjacent first module units 100 and is arranged at corresponding overlapping positions.

[0029] This configuration, which overlaps the edges of adjacent module units, increases the effective area of ​​the battery within the module, further enhancing the module's power. Furthermore, an insulating strip 400 is used to connect adjacent module units at the overlapping locations. The insulating strip 400 not only provides insulation but also serves as a connection, simplifying the overall structure and manufacturing process.

[0030] Furthermore, in a first module unit 100, the edges of two adjacent battery strings along the second direction can also be overlapped. This allows for a further increase in the effective area of ​​the batteries within the module.

[0031] It is worth noting that the edge of the insulating strip 400 does not extend beyond the edge of the corresponding battery string (which may be the first battery string 10 or the second battery string 20) to prevent the front of the battery from being blocked and affecting the power.

[0032] It should be noted that, along the first direction, the length of the insulating strip 400 is not less than the length of the corresponding battery string.

[0033] When battery strings are stacked, and two battery strings are connected using an insulating strip 400, the insulating strip 400 is first placed on the back edge of one battery string, with the edge of the insulating strip 400 not extending beyond the edge of the battery string. Then, the adjacent battery string is placed on top of the insulating strip 400 and overlaps with the edge of the previous battery string. This process is repeated to complete the placement of all battery strings.

[0034] Furthermore, in this embodiment, as Figure 16 As shown, along the second direction, the overlap width of adjacent first module units 100 is a, which satisfies 0.2mm≤a≤1mm.

[0035] Furthermore, in this embodiment, as Figure 16 As shown, along the second direction, the width of the insulating strip 400 is b, which satisfies 6mm≤b≤20mm.

[0036] Furthermore, in this embodiment, as Figure 17 As shown, the insulating strip 400 includes an insulating layer 410 and an adhesive layer 420. The adhesive layer 420 is provided on both opposite sides of the insulating layer 410, and the adhesive layer 420 is connected to the first module unit 100.

[0037] It should be noted that the insulating strip 400 has a three-layer structure. The inner and outer layers are made of materials that have an adhesive effect after heat melting, such as EVA, POE, and hot melt adhesive. After the battery string is placed, the insulating strip 400 can be heated by a heating device using hot air or hot pressing to bond and fix the insulating strip 400 to the battery string. Alternatively, a fixing material such as tape or glue can be used to initially fix the insulating strip 400 to the battery string, and then the heating during the lamination process can be used to bond and fix the insulating strip 400 to the battery string.

[0038] In this embodiment, as Figure 15 and Figure 16 As shown, the multi-slice photovoltaic module also includes a busbar 500, which is disposed between the first module unit 100 and the insulating strip 400.

[0039] It is worth noting that, along the second direction, the width of the busbar 500 does not exceed the width of the insulating strip 400. The busbar 500 is arranged parallel to the battery string, and the insulating strip 400 can connect and fix the busbar 500 to the corresponding battery string and isolate it from adjacent battery strings.

[0040] It should be noted that in related technologies, the busbar 500 (jump wire) is placed on the insulating strip, which serves as an insulating barrier. However, the insulating strip cannot secure the busbar 500 and the battery string, requiring additional fixing methods, resulting in a complex overall structure and manufacturing process. In this embodiment, however, a multi-layered insulating strip 400 is used to isolate the busbar 500 and the battery string. The insulating strip 400, busbar 500, and battery string are then fixed together through hot pressing or hot air heating, eliminating the need for additional materials and simplifying the structure and process.

[0041] In this embodiment, as Figure 3 As shown, in a first battery string 10, two adjacent edge pieces 11 are arranged overlappingly. Each edge piece 11 includes a non-cut surface 13 and a cut surface 14 arranged opposite to each other along a first direction. The non-cut surface 13 of one edge piece 11 is located below the adjacent edge piece 11.

[0042] Furthermore, in this embodiment, as Figure 3 As shown, along the first direction, the overlap width of two adjacent edge pieces 11 is c, which satisfies 0.4mm≤c≤1.5mm.

[0043] It is worth noting that a chamfer is usually formed at the end of the edge piece 11 on the side of the non-cut surface 13, and the side of the edge piece 11 on the side of the non-cut surface 13 is located at the edge of the large battery cell 1. Due to the uniformity of the battery coating, the battery efficiency of the edge part usually deviates. Therefore, when stacking cells, placing the non-cut surface 13 of the edge piece 11 below the adjacent cell can effectively avoid the problems of poor edge efficiency and small area caused by the chamfer on the edge, which affect the module power.

[0044] In this embodiment, as Figure 4 As shown, in a second battery string 20, two adjacent intermediate pieces 12 are overlapped, and each intermediate piece 12 includes two cut surfaces 14 arranged opposite each other along a first direction.

[0045] Furthermore, in this embodiment, as Figure 4 As shown, along the first direction, the overlap width of two adjacent intermediate pieces 12 is d, which satisfies 0.4mm≤d≤1.5mm.

[0046] Example 2 According to an embodiment of this utility model, a multi-slice photovoltaic module is provided, such as... Figure 9 and Figure 10 As shown, the multi-slice photovoltaic module includes several second module units 200 connected in series. The several second module units 200 are arranged sequentially along a second direction, and the edges of adjacent second module units 200 overlap. The multi-slice photovoltaic module also includes an insulating strip 400, which is connected between adjacent second module units 200 and is arranged at corresponding overlapping positions.

[0047] With this configuration, in the multi-slice photovoltaic module of this embodiment, only the first cell string 10 exists, while the second cell string 20 does not. Since the edge slices 11 are concentrated in one photovoltaic module, the power of the module can be significantly increased.

[0048] Furthermore, in a second module unit 200, the edges of two adjacent battery strings along the second direction can also be overlapped. This allows for a further increase in the effective area of ​​the batteries within the module.

[0049] It is worth noting that the edge of the insulating strip 400 does not extend beyond the edge of the corresponding battery string (first battery string 10) to prevent the front of the battery from being blocked and affecting the power.

[0050] It should be noted that, along the first direction, the length of the insulating strip 400 is not less than the length of the corresponding battery string.

[0051] Furthermore, in this embodiment, along the second direction, the overlap width of adjacent second module units 200 is a, which satisfies 0.2mm≤a≤1mm.

[0052] Furthermore, in this embodiment, along the second direction, the width of the insulating strip 400 is b, which satisfies 6mm≤b≤20mm.

[0053] Furthermore, in this embodiment, the insulating strip 400 includes an insulating layer 410 and an adhesive layer 420. The adhesive layer 420 is provided on both opposite sides of the insulating layer 410, and the adhesive layer 420 is connected to the second module unit 200.

[0054] In this embodiment, the multi-slice photovoltaic module also includes a busbar 500, which is disposed between the second module unit 200 and the insulating strip 400.

[0055] It is worth noting that, along the second direction, the width of the busbar 500 does not exceed the width of the insulating strip 400. The busbar 500 is arranged parallel to the battery string, and the insulating strip 400 can connect and fix the busbar 500 to the corresponding battery string and isolate it from adjacent battery strings.

[0056] In this embodiment, in a first battery string 10, two adjacent edge pieces 11 are overlapped. Each edge piece 11 includes a non-cut surface 13 and a cut surface 14 arranged opposite to each other along a first direction. The non-cut surface 13 of one edge piece 11 is located below the adjacent edge piece 11.

[0057] Furthermore, in this embodiment, along the first direction, the overlap width of two adjacent edge pieces 11 is c, which satisfies 0.4mm≤c≤1.5mm.

[0058] Example 3 According to an embodiment of this utility model, a multi-slice photovoltaic module is provided, such as... Figure 11 and Figure 12 As shown, the multi-slice photovoltaic module includes several third module units 300 connected in series. The several third module units 300 are arranged sequentially along the second direction, and the edges of adjacent third module units 300 overlap. The multi-slice photovoltaic module also includes an insulating strip 400, which is connected between adjacent third module units 300 and is arranged at corresponding overlapping positions.

[0059] With this configuration, in the multi-slice photovoltaic module of this embodiment, there is only the second battery string 20, and the first battery string 10 is not present.

[0060] Furthermore, in a third module unit 300, the edges of two adjacent battery strings along the second direction can also be overlapped. This allows for a further increase in the effective area of ​​the batteries within the module.

[0061] It is worth noting that the edge of the insulating strip 400 does not extend beyond the edge of the corresponding battery string (second battery string 20) to prevent the front of the battery from being blocked and affecting the power.

[0062] It should be noted that, along the first direction, the length of the insulating strip 400 is not less than the length of the corresponding battery string.

[0063] Furthermore, in this embodiment, along the second direction, the overlap width of adjacent third module units 300 is a, which satisfies 0.2mm≤a≤1mm.

[0064] Furthermore, in this embodiment, along the second direction, the width of the insulating strip 400 is b, which satisfies 6mm≤b≤20mm.

[0065] Furthermore, in this embodiment, the insulating strip 400 includes an insulating layer 410 and an adhesive layer 420. The adhesive layer 420 is provided on both opposite sides of the insulating layer 410, and the adhesive layer 420 is connected to the third module unit 300.

[0066] In this embodiment, the multi-slice photovoltaic module also includes a busbar 500, which is disposed between the third module unit 300 and the insulating strip 400.

[0067] It is worth noting that, along the second direction, the width of the busbar 500 does not exceed the width of the insulating strip 400. The busbar 500 is arranged parallel to the battery string, and the insulating strip 400 can connect and fix the busbar 500 to the corresponding battery string and isolate it from adjacent battery strings.

[0068] In this embodiment, in a second battery string 20, two adjacent intermediate pieces 12 are overlapped, and each intermediate piece 12 includes two cut surfaces 14 arranged opposite each other along a first direction.

[0069] Furthermore, in this embodiment, along the first direction, the overlap width of two adjacent intermediate pieces 12 is d, which satisfies 0.4mm≤d≤1.5mm.

[0070] The following describes the layout design of battery strings using the above embodiments for the three-slice and four-slice schemes commonly used in multi-slice technology.

[0071] I. Four-slice component like Figure 1 As shown, a single battery cell 1 is cut into four smaller pieces, two of which are edge pieces 11 and the other two are middle pieces 12. Cutting n single battery cells 1 in the same manner will result in 2n edge pieces 11 and 2n middle pieces 12. The n edge pieces 11 are then wired together to form a first battery string 10, and the n middle pieces 12 are wired together to form a second battery string 20, thus creating two first battery strings 10 and two second battery strings 20.

[0072] In the first typesetting method, such as Figure 5 As shown, two first battery strings 10 and two second battery strings 20 are connected in parallel to form a first module unit 100. In a first module unit 100, the two battery strings along the first direction are respectively the first battery string 10 and the second battery string 20, and the two battery strings along the second direction are either both the first battery string 10 or both the second battery string 20.

[0073] That is, such as Figure 6 As shown, the first battery string 10 and the second battery string 20 are respectively located on the left and right sides of the assembly. Specifically, the left side consists entirely of the second battery string 20, and the right side consists entirely of the first battery string 10. Figure 15 As shown, in two adjacent first module units 100, the edges of the two first battery strings 10 overlap and are provided with insulating strips 400, and the edges of the two second battery strings 20 overlap and are provided with insulating strips 400.

[0074] For further details, please refer to Figure 5 In a first module unit 100, along the second direction, two adjacent first battery strings 10 can also be edge-overlapping, and two adjacent second battery strings 20 can also be edge-overlapping.

[0075] In the second typesetting method, such as Figure 7 As shown, two first battery strings 10 and two second battery strings 20 are connected in parallel to form a first module unit 100. The two battery strings along the first direction are the first battery string 10 and the second battery string 20, respectively, and the two battery strings along the second direction are the first battery string 10 and the second battery string 20, respectively.

[0076] That is, such as Figure 8 As shown, on the left side of the component, the first battery string 10 and the second battery string 20 are alternately arranged in sequence, and on the right side of the component, the first battery string 10 and the second battery string 20 are alternately arranged in sequence. This arrangement facilitates the left-right symmetrical design of the component and improves the consistency of appearance. In two adjacent first module units 100, the edges of the first battery string 10 and the second battery string 20 are overlapped and an insulating strip 400 is placed there.

[0077] For further details, please refer to Figure 7 In a first module unit 100, along the second direction, adjacent first battery strings 10 and second battery strings 20 can also be configured to overlap at the edges.

[0078] In the third typesetting method, such as Figure 10 and Figure 12 As shown, one photovoltaic module includes only a second module unit 200 formed by combining the first battery strings 10, and another photovoltaic module includes only a third module unit 300 formed by combining the second battery strings 20.

[0079] For further details, please refer to Figure 9 In a second module unit 200, along the second direction, two adjacent first battery strings 10 can also be configured with edge overlap. (See also...) Figure 11 In a third module unit 300, along the second direction, two adjacent second battery strings 20 can also be set to overlap at the edges.

[0080] Two- or three-slice components like Figure 2 As shown, a single battery cell 1 is cut into three smaller pieces, two of which are edge pieces 11 and one is a middle piece 12. Cutting n single battery cells 1 in the same way will result in 2n edge pieces 11 and n middle pieces 12. The n edge pieces 11 are then wired together to form a first battery string 10, and the n middle pieces 12 are wired together to form a second battery string 20, thus creating two first battery strings 10 and one second battery string 20.

[0081] In the first layout, two first battery strings 10 and one second battery string 20 are connected in parallel to form a first module unit 100.

[0082] In the second layout, one photovoltaic module includes only a second module unit 200 formed by combining the first battery strings 10, and the other photovoltaic module includes only a third module unit 300 formed by combining the second battery strings 20.

[0083] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A multi-slice photovoltaic module, characterized in that, include: Two edge pieces (11) and at least one middle piece (12) are cut from a battery cell (1). Several edge pieces (11) are connected in sequence along a first direction to form a first battery string (10), and several middle pieces (12) are connected in sequence along a first direction to form a second battery string (20). The first module unit (100) includes two first battery strings (10) and at least one second battery string (20) arranged in parallel. The multi-slice photovoltaic module includes a plurality of first module units (100) arranged in series. The plurality of first module units (100) are arranged sequentially along a second direction. The edges of adjacent first module units (100) overlap. The multi-slice photovoltaic module also includes an insulating strip (400). The insulating strip (400) is connected between adjacent first module units (100) and is arranged at corresponding overlapping positions.

2. The multi-slice photovoltaic module according to claim 1, characterized in that, Along the second direction, the overlap width of adjacent first module units (100) is a, which satisfies 0.2mm≤a≤1mm.

3. The multi-slice photovoltaic module according to claim 1, characterized in that, Along the second direction, the width of the insulating strip (400) is b, which satisfies 6mm≤b≤20mm.

4. The multi-slice photovoltaic module according to any one of claims 1 to 3, characterized in that, The insulating strip (400) includes an insulating layer (410) and an adhesive layer (420). The adhesive layer (420) is provided on both opposite sides of the insulating layer (410). The adhesive layer (420) is connected to the first module unit (100).

5. The multi-slice photovoltaic module according to any one of claims 1 to 3, characterized in that, The multi-slice photovoltaic module also includes a busbar (500), which is disposed between the first module unit (100) and the insulating strip (400).

6. The multi-slice photovoltaic module according to any one of claims 1 to 3, characterized in that, In a first battery string (10), two adjacent edge pieces (11) are arranged overlappingly, each edge piece (11) includes a non-cut surface (13) and a cut surface (14) arranged opposite to each other along a first direction, and the non-cut surface (13) of one edge piece (11) is located below the adjacent edge piece (11); In a second battery string (20), two adjacent intermediate pieces (12) are arranged in an overlapping manner, and each intermediate piece (12) includes two cut surfaces (14) arranged opposite to each other along a first direction.

7. The multi-slice photovoltaic module according to claim 6, characterized in that, Along the first direction, the overlap width of two adjacent edge pieces (11) is c, which satisfies 0.4mm≤c≤1.5mm; Along the first direction, the overlap width of two adjacent intermediate pieces (12) is d, which satisfies 0.4mm≤d≤1.5mm.

8. The multi-slice photovoltaic module according to any one of claims 1 to 3, characterized in that, In one of the first module units (100), the two battery strings along the first direction are respectively a first battery string (10) and a second battery string (20), and the two battery strings along the second direction are either both the first battery string (10) or both the second battery string (20); or, In one of the first module units (100), the two battery strings along the first direction are respectively a first battery string (10) and a second battery string (20), and the two battery strings along the second direction are respectively a first battery string (10) and a second battery string (20); and / or, In one of the first module units (100), the edges of two adjacent battery strings are overlapped along the second direction.

9. A multi-slice photovoltaic module, characterized in that, include: Two edge pieces (11) and at least one middle piece (12) are cut from a battery cell (1). Several edge pieces (11) are connected in sequence along a first direction to form a first battery string (10), and several middle pieces (12) are connected in sequence along a first direction to form a second battery string (20). The second module unit (200) includes at least two first battery strings (10) arranged in parallel. The multi-slice photovoltaic module includes a plurality of second module units (200) arranged in series. The plurality of second module units (200) are arranged sequentially along a second direction. The edges of adjacent second module units (200) overlap. The multi-slice photovoltaic module also includes an insulating strip (400). The insulating strip (400) is connected between adjacent second module units (200) and is arranged at corresponding overlapping positions.

10. A multi-slice photovoltaic module, characterized in that, include: Two edge pieces (11) and at least one middle piece (12) are cut from a battery cell (1). Several edge pieces (11) are connected in sequence along a first direction to form a first battery string (10), and several middle pieces (12) are connected in sequence along a first direction to form a second battery string (20). The third module unit (300) includes at least two second battery strings (20) arranged in parallel. The multi-slice photovoltaic module includes a plurality of third module units (300) arranged in series. The plurality of third module units (300) are arranged sequentially along a second direction. The edges of adjacent third module units (300) overlap. The multi-slice photovoltaic module also includes an insulating strip (400). The insulating strip (400) is connected between adjacent third module units (300) and is arranged at corresponding overlapping positions.

Images