Battery assembly and photovoltaic tile

Abstract

The utility model provides a battery assembly and a photovoltaic tile. The battery assembly comprises a base plate; the plurality of battery pieces are arranged on the bottom plate, the plurality of battery pieces at least comprise a first battery piece and a second battery piece which are adjacent to each other, and a part of the first battery piece is overlapped with a part of the second battery piece; and the flexible piece is arranged at the overlapped part of the first battery piece and the second battery piece and is positioned between the first battery piece and the second battery piece.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic equipment, in particular to a battery assembly and a photovoltaic tile. Background Art

[0002] At present, photovoltaic building integration has become a trend in building development. The roof is an important part for receiving sunlight, and related photovoltaic products are also diverse. Curved photovoltaic tiles have become one of the most popular products. While generating electricity, they can be installed on buildings and can be used as multifunctional building materials to constitute actual building components. The market prospects are broad.

[0003] Most of the curved photovoltaic tiles in related technologies are single-cell or conventional cell spacing technology, with poor appearance consistency. The stacked cell technology is difficult to apply and has a low yield rate due to the curvature. Utility Model Content

[0004] The embodiments of the utility model are intended to solve at least one of the technical problems existing in the prior art.

[0005] To this end, a first aspect of an embodiment of the utility model provides a battery assembly.

[0006] A second aspect of the embodiments of the present invention provides a photovoltaic tile.

[0007] In view of this, according to the first aspect of an embodiment of the utility model, a battery assembly is provided, the battery assembly comprising: a base plate; a plurality of battery cells, arranged on the base plate, the plurality of battery cells at least comprising adjacent first battery cells and second battery cells, a portion of the first battery cell overlapping a portion of the second battery cell; a flexible member, arranged at the overlapping portion of the first battery cell and the second battery cell, and located between the first battery cell and the second battery cell.

[0008] The battery assembly provided by the embodiment of the utility model includes a base plate, a plurality of battery cells and a flexible member. Specifically, the plurality of battery cells are arranged on the base plate, and the plurality of battery cells include at least adjacent first and second battery cells, and a portion of the first battery cell overlaps with a portion of the second battery cell, that is, any two adjacent battery cells among the plurality of battery cells partially overlap.

[0009] That is, the plurality of battery cells are stacked battery cells. Compared with the single-cell battery cells and the battery cells with conventional cell spacing in the related art, the consistency of the appearance of the battery assembly can be ensured.

[0010] The flexible component is arranged at the overlapping position of the first battery cell and the second battery cell, and the flexible component is located between the first battery cell and the second battery cell. That is to say, the flexible component is arranged at the overlapping position of any two adjacent battery cells, and the flexible component is located between the adjacent battery cells, thereby avoiding rigid contact between the two adjacent battery cells during the bending process of the battery assembly, significantly improving the problem of excessive local stress at the overlapping position of the battery cells during the bending process, playing a certain protective role on the battery cells, and thus effectively reducing the risk of hidden cracks in the battery cells, improving the yield of the battery assembly, reducing the application difficulty of the stacked battery cells, and expanding the application prospects of the stacked battery cells.

[0011] Optionally, the flexible member includes one of ethylene-vinyl acetate copolymer (EVA), polyolefin elastomer (POE), polyvinyl butyral (PVB) and 2,4,6-trimethylbenzoyl-diphenylphosphine oxide (TPO).

[0012] Optionally, a flexible member is provided at the overlapping position of any two adjacent battery sheets.

[0013] Optionally, the base plate comprises a rigid curved plate or a flexible plate.

[0014] Optionally, each cell is a crystalline silicon cell with an unobstructed front side, that is, the positive electrode and the negative electrode of each cell are both led out through the backlight side of the cell.

[0015] Optionally, the cell comprises an XBC (Interdigitated Back Contact Solar Cell).

[0016] In addition, the battery assembly provided by the above technical solution of the utility model also has the following additional technical features:

[0017] In some technical solutions, optionally, along the width direction of the flexible member, the first end of the flexible member exceeds the outer edge of the first battery cell; and / or along the width direction of the flexible member, the second end of the flexible member exceeds the outer edge of the second battery cell.

[0018] In this technical solution, along the width direction of the flexible member, the first end of the flexible member exceeds the outer edge of the first battery cell, and / or, along the width direction of the flexible member, the second end of the flexible member exceeds the outer edge of the second battery cell.

[0019] That is to say, in the width direction of the flexible member, at least one end of the flexible member exceeds the outer edge of the first battery cell and / or the second battery cell. This can further avoid the rigid contact between two adjacent battery cells during the bending process of the battery assembly, significantly improve the problem of excessive local stress at the overlapping position of the battery cells during the bending process, play a certain protective role on the battery cells, further reduce the risk of hidden cracks in the battery cells, and improve the yield of the battery assembly.

[0020] In some technical solutions, optionally, along the length direction of the flexible member, the flexible member extends to at least two ends of the first battery cell.

[0021] In this technical solution, along the length direction of the flexible member, the flexible member extends at least to the two ends of the first battery cell, that is, along the length direction of the flexible member, the flexible member extends to the two ends of the first battery cell, or, along the length direction of the flexible member, the flexible member extends beyond the two ends of the first battery cell.

[0022] That is, the flexible component is laid throughout the overlapping position of the first battery cell and the second battery cell, thereby avoiding rigid contact at any overlapping position of adjacent battery cells, and further avoiding rigid contact between two adjacent battery cells during the bending process of the battery assembly, reducing the risk of battery cell breakage and improving the yield of the battery assembly.

[0023] In some technical solutions, optionally, the battery assembly further includes a thickening member, which is disposed on a side of the overlapping portion of the first battery cell and the second battery cell away from the bottom plate and is connected to the first battery cell and the second battery cell.

[0024] In this technical solution, it is defined that the battery assembly also includes a thickening member. Specifically, the thickening member is arranged on the side of the overlapping portion of the first battery cell and the second battery cell away from the bottom plate, and the thickening member is connected to the first battery cell and the second battery cell. That is to say, the thickening member is arranged in front of the overlapping position of the first battery cell and the second battery cell, thereby increasing the thickness of the overlapping position of the first battery cell and the second battery cell. When the battery assembly is bent, the curvature of the overlapping position can be reduced, and the deformation of the overlapping position can be reduced, thereby effectively reducing the risk of hidden cracks during the bending of the battery cell, and improving the process yield of the battery assembly.

[0025] Optionally, a thickening member is arranged before the first battery cell and the second battery cell overlap by using a pre-treatment process or a tooling process.

[0026] Specifically, the pretreatment process is to first lay a thickening member at the overlapping position of the first battery cell and the second battery cell, and then use a heating device such as an electric soldering iron to fix the thickening member in front of the overlapping position of the first battery cell and the second battery cell.

[0027] The tooling process is specifically to use the tooling to position multiple thickening parts, and then laminate the first plate, the first adhesive film, multiple thickening parts, multiple battery cells, the bottom plate, the second adhesive film and the second plate to obtain photovoltaic tiles.

[0028] In some technical solutions, optionally, along the length direction of the flexible member, the thickening member extends at least to two ends of the first battery cell.

[0029] In this technical solution, the thickening member extends at least to both ends of the first battery cell along the length direction of the flexible member, that is, the thickening member extends to both ends of the first battery cell along the length direction of the flexible member, or, along the length direction of the flexible member, the thickening member extends beyond both ends of the first battery cell.

[0030] That is, the thickening member is laid throughout the entire length before the overlapping position of the first battery cell and the second battery cell, thereby increasing the thickness of any overlapping position of adjacent battery cells, further reducing the risk of the battery assembly breaking during bending, and improving the process yield of the battery assembly.

[0031] In some technical solutions, optionally, the width b of the thickening member satisfies 2mm≤b≤10mm; and / or the thickness d1 of the thickening member satisfies 0.3mm≤d1≤0.7mm; and / or the thickening member includes one of an ethylene-vinyl acetate member, a polyolefin elastomer, a polyvinyl butyral member and a 2,4,6-trimethylbenzoyl-diphenylphosphine oxide member.

[0032] In this technical solution, the range of the width of the thickening member is limited. Specifically, the width of the thickening member is between 2 mm and 10 mm. This can save the amount of the thickening member while covering any overlapping position of adjacent battery cells, thereby ensuring the production cost of the battery assembly.

[0033] It is understandable that if the width of the thickening piece is too small, that is, the width of the thickening piece is less than 2mm, it will not be able to effectively increase the thickness of the overlapping position of adjacent battery cells, increasing the risk of battery cell breakage during the bending process of the battery assembly. If the width of the thickening piece is too large, that is, the width of the thickening piece is greater than 10mm, it will cause material waste and increase the production cost of the battery assembly.

[0034] The thickness of the thickening piece is between 0.3 mm and 0.7 mm, ensuring that the thickness of the overlapping position of adjacent battery cells is effectively increased.

[0035] The thickening member includes one of ethylene-vinyl acetate member, polyolefin elastomer, polyvinyl butyral member and 2,4,6-trimethylbenzoyl-diphenylphosphine oxide member. That is, the thickening member includes one of ethylene-vinyl acetate copolymer (EVA) material, polyolefin elastomer (POE), polyvinyl butyral (PVB) material and 2,4,6-trimethylbenzoyl-diphenylphosphine oxide (TPO) material.

[0036] According to the second aspect of the utility model, a photovoltaic tile is provided, including a battery assembly provided by any of the above technical solutions, thereby having all the beneficial technical effects of the battery assembly, which will not be repeated here.

[0037] Furthermore, the photovoltaic tile also includes a first plate body, a first adhesive film, a second plate body and a second adhesive film, wherein the first adhesive film is arranged between the first plate body and the battery assembly, the multiple battery cells are located on the side of the base plate facing the first adhesive film, the second plate body is located on the side of the base plate away from the multiple battery cells, and the second adhesive film is arranged between the second plate body and the base plate.

[0038] The photovoltaic tile provided by the embodiment of the utility model includes a first plate body, a second plate body, a first adhesive film, a second adhesive film and a battery assembly. Specifically, the first adhesive film is arranged between the first plate body and the battery assembly, and the plurality of battery cells are located on the side of the base plate facing the first adhesive film, that is, the light-receiving side of the plurality of battery cells faces the first adhesive film.

[0039] The second adhesive film is located between the second plate body and the bottom plate.

[0040] It can be understood that after the first plate body, the first adhesive film, the battery assembly, the second adhesive film and the second plate body are stacked, vacuum lamination is used to form a whole, namely, a photovoltaic tile.

[0041] Optionally, the first plate body comprises a rigid curved plate, wherein the texture and color of the first plate body can be set according to actual needs.

[0042] Optionally, the first plate includes ultra-clear curved tempered glass.

[0043] In addition, the photovoltaic tile provided according to the above technical solution of the utility model also has the following additional technical features:

[0044] In some technical solutions, optionally, a water-blocking and weather-resistant layer is provided on a side of the second plate body facing away from the second adhesive film.

[0045] In this technical solution, it is defined that a water-blocking and weather-resistant layer is provided on the side of the second plate body facing away from the second adhesive film, so that the photovoltaic tile has water-blocking and weather-resistant properties.

[0046] Optionally, the water-blocking and weather-resistant layer is a polymer material layer.

[0047] Optionally, the second plate body is a composite PVDF / PET / PVDF three-layer coating structure, that is, the second plate body uses PET (polyester resin) material as a substrate, and PVDF (polyvinylidene fluoride) material is coated on the outside of the substrate.

[0048] In some technical schemes, optionally, the thickness d2 of the first adhesive film satisfies 0.3mm≤d2≤0.7mm; and / or the first adhesive film includes one of ethylene-vinyl acetate parts, polyolefin elastomers, polyvinyl butyral parts and 2,4,6-trimethylbenzoyl-diphenylphosphine oxide parts; and / or the thickness d3 of the second adhesive film satisfies 0.3mm≤d3≤0.7mm; and / or the second adhesive film includes one of ethylene-vinyl acetate parts, polyolefin elastomers, polyvinyl butyral parts and 2,4,6-trimethylbenzoyl-diphenylphosphine oxide parts.

[0049] In this technical solution, the thickness of the first adhesive film is between 0.3 mm and 0.7 mm.

[0050] The thickness of the second adhesive film is between 0.3 mm and 0.7 mm.

[0051] The first adhesive film includes one of ethylene-vinyl acetate parts, polyolefin elastomers, polyvinyl butyral parts and 2,4,6-trimethylbenzoyl-diphenylphosphine oxide parts, that is, the first adhesive film includes one of ethylene-vinyl acetate copolymer (EVA) material, polyolefin elastomer (POE), polyvinyl butyral (PVB) material and 2,4,6-trimethylbenzoyl-diphenylphosphine oxide (TPO) material.

[0052] The second adhesive film includes one of ethylene-vinyl acetate parts, polyolefin elastomers, polyvinyl butyral parts and 2,4,6-trimethylbenzoyl-diphenylphosphine oxide parts, that is, the second adhesive film includes one of ethylene-vinyl acetate copolymer (EVA) material, polyolefin elastomer (POE), polyvinyl butyral (PVB) material and 2,4,6-trimethylbenzoyl-diphenylphosphine oxide (TPO) material.

[0053] In some technical solutions, optionally, at least one of the bottom plate, the first plate body and the second plate body is constructed as a rigid curved plate.

[0054] In this technical solution, at least one of the bottom plate, the first plate body and the second plate body is constructed as a rigid curved plate, that is, the bottom plate is a rigid curved plate, and the first plate body and the second plate body are both flexible plates. Alternatively, the bottom plate and the first plate body are both rigid curved plates, and the second plate body is a flexible plate. Alternatively, the first plate body is a rigid curved plate, and the bottom plate and the second plate body are both flexible plates. They are not listed here one by one.

[0055] By constructing at least one of the bottom plate, the first plate body and the second plate body as a rigid curved plate, the manufactured photovoltaic tile is made into a curved photovoltaic tile, thereby improving the aesthetics of the photovoltaic tile.

[0056] It can be understood that after the first plate, the first adhesive film, the battery assembly, the second adhesive film and the second plate are laminated, the curvatures of the materials fit together.

[0057] In some technical solutions, optionally, a radius R of a curved surface of the rigid curved panel satisfies 26 mm≤R≤200 mm; and / or the rigid curved panel includes a curved portion, and the number n of the curved portions satisfies 1≤n≤10.

[0058] In this technical solution, the radius of the curved surface of the rigid curved panel is between 26 mm and 200 mm.

[0059] The rigid curved panel includes a curved portion, and the number of the curved portions is between 1 and 10. It is understood that when the number of the curved portions is 1, the rigid curved panel is a single-peak curved panel. When the number of the curved portions is 2, the rigid curved panel is a single-peak-trough curved panel. When the number of the curved portions is greater than 2, the rigid curved panel is a multi-peak curved panel.

[0060] Additional aspects and advantages of the present invention will be given in the following description, and some will become apparent from the following description, or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0062] Figure 1 One of the partial structural schematic diagrams of a battery assembly according to an embodiment of the utility model is shown;

[0063] Figure 2 A second partial structural schematic diagram of a battery assembly according to an embodiment of the utility model is shown;

[0064] Figure 3 A third partial structural schematic diagram of a battery assembly according to an embodiment of the utility model is shown;

[0065] Figure 4 A fourth partial structural schematic diagram of a battery assembly according to an embodiment of the utility model is shown;

[0066] Figure 5 A schematic structural diagram of a photovoltaic tile according to an embodiment of the utility model is shown.

[0067] in, Figures 1 to 5 The corresponding relationship between the reference numerals and the component names is as follows:

[0068] 100 battery assembly, 110 bottom plate, 120 battery cell, 121 first battery cell, 122 second battery cell, 130 flexible component, 131 first end, 132 second end, 140 thickening component, 200 photovoltaic tile, 210 first plate body, 220 first adhesive film, 230 second plate body, 231 water-blocking and weather-resistant layer, 240 second adhesive film. DETAILED DESCRIPTION

[0069] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0070] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0071] Refer to the following Figures 1 to 5 The battery assembly 100 and the photovoltaic tile 200 provided according to some embodiments of the present invention are described.

[0072] In one embodiment according to the present application, Figure 1 and Figure 2 As shown, a battery assembly 100 is proposed, and the battery assembly 100 includes: a base plate 110; a plurality of battery cells 120, which are arranged on the base plate 110, and the plurality of battery cells 120 include at least adjacent first battery cells 121 and second battery cells 122, and a portion of the first battery cell 121 overlaps a portion of the second battery cell 122; a flexible member 130, which is arranged at the overlapping portion of the first battery cell 121 and the second battery cell 122, and is located between the first battery cell 121 and the second battery cell 122.

[0073] The battery assembly 100 provided in the embodiment of the utility model includes a base plate 110, a plurality of battery cells 120 and a flexible member 130. Specifically, the plurality of battery cells 120 are arranged on the base plate 110, and the plurality of battery cells 120 include at least adjacent first battery cells 121 and second battery cells 122, and a portion of the first battery cell 121 overlaps with a portion of the second battery cell 122, that is, any two adjacent battery cells 120 among the plurality of battery cells 120 partially overlap.

[0074] That is, the plurality of battery cells 120 are stacked battery cells, which can ensure the consistency of the appearance of the battery assembly 100 compared to the single-chip battery cells and the battery cells with conventional inter-chip spacing in the related art.

[0075] The flexible member 130 is arranged at the overlapping position of the first battery cell 121 and the second battery cell 122, and the flexible member 130 is located between the first battery cell 121 and the second battery cell 122. That is to say, the flexible member 130 is arranged at the overlapping position of any two adjacent battery cells 120, and the flexible member 130 is located between the adjacent battery cells 120, thereby avoiding rigid contact between two adjacent battery cells 120 during the bending process of the battery assembly 100, significantly improving the problem of excessive local stress at the overlapping position of the battery cell 120 during the bending process, playing a certain protective role for the battery cell 120, and then effectively reducing the risk of hidden cracks in the battery cell 120, improving the yield of the battery assembly 100, reducing the application difficulty of the laminated battery cells, and expanding the application prospects of the laminated battery cells.

[0076] Optionally, the flexible member 130 includes one of ethylene vinyl acetate copolymer (EVA), polyolefin elastomer (POE), polyvinyl butyral (PVB) and 2,4,6-trimethylbenzoyl-diphenylphosphine oxide (TPO).

[0077] Optionally, a flexible member 130 is provided at the overlapping position of any two adjacent battery cells 120 .

[0078] Optionally, the base plate 110 includes a rigid curved plate or a flexible plate.

[0079] Optionally, each cell 120 is a crystalline silicon cell 120 with no obstruction on the front side, that is, the positive electrode and the negative electrode of each cell 120 are both led out through the backlight side of the cell 120 .

[0080] Optionally, the cell 120 comprises an XBC (Interdigitated Back Contact Solar Cell).

[0081] like Figure 1 As shown, in some embodiments, optionally, along the width direction of the flexible member 130, the first end 131 of the flexible member 130 exceeds the outer edge of the first battery cell 121; and / or along the width direction of the flexible member 130, the second end 132 of the flexible member 130 exceeds the outer edge of the second battery cell 122.

[0082] In this embodiment, along the width direction of the flexible member 130 , the first end 131 of the flexible member 130 exceeds the outer edge of the first battery cell 121 , and / or, along the width direction of the flexible member 130 , the second end 132 of the flexible member 130 exceeds the outer edge of the second battery cell 122 .

[0083] That is to say, in the width direction of the flexible member 130, at least one end of the flexible member 130 exceeds the outer edge of the first battery cell 121 and / or the second battery cell 122. This can further avoid the rigid contact between two adjacent battery cells 120 during the bending process of the battery assembly 100, significantly improve the problem of excessive local stress at the overlapping position of the battery cell 120 during the bending process, play a certain protective role for the battery cell 120, further reduce the risk of hidden cracks in the battery cell 120, and improve the yield of the battery assembly 100.

[0084] like Figure 2 As shown, in some embodiments, optionally, along the length direction of the flexible member 130 , the flexible member 130 at least extends to two ends of the first battery cell 121 .

[0085] In this embodiment, along the length direction of the flexible member 130, the flexible member 130 extends at least to the two ends of the first battery cell 121, that is, along the length direction of the flexible member 130, the flexible member 130 extends to the two ends of the first battery cell 121, or, along the length direction of the flexible member 130, the flexible member 130 extends beyond the two ends of the first battery cell 121.

[0086] That is, the flexible component 130 is laid throughout the length of the overlapping position of the first battery cell 121 and the second battery cell 122, thereby avoiding rigid contact at any overlapping position of adjacent battery cells 120, and further avoiding rigid contact between two adjacent battery cells 120 during the bending process of the battery assembly 100, thereby reducing the risk of battery cell 120 breakage and improving the yield of the battery assembly 100.

[0087] like Figure 3 and Figure 4 As shown, in some embodiments, optionally, the battery assembly 100 further includes a thickening member 140 , which is disposed on a side of the overlapping portion of the first battery cell 121 and the second battery cell 122 away from the bottom plate 110 , and is connected to the first battery cell 121 and the second battery cell 122 .

[0088] In this embodiment, it is defined that the battery assembly 100 also includes a thickening member 140. Specifically, the thickening member 140 is arranged on the side of the overlapping portion of the first battery cell 121 and the second battery cell 122 away from the bottom plate 110, and the thickening member 140 is connected to the first battery cell 121 and the second battery cell 122. That is to say, the thickening member 140 is arranged in front of the overlapping position of the first battery cell 121 and the second battery cell 122, thereby increasing the thickness of the overlapping position of the first battery cell 121 and the second battery cell 122. When the battery assembly 100 is bent, the curvature of the overlapping position can be reduced, and the deformation of the overlapping position can be reduced, thereby effectively reducing the risk of hidden cracks in the battery cell 120 during the bending process, thereby improving the process yield of the battery assembly 100.

[0089] Optionally, a pre-treatment or tooling process is used to arrange the thickening member 140 before the first battery cell 121 and the second battery cell 122 overlap.

[0090] Specifically, the pretreatment process is to first lay the thickening member 140 at the overlapping position of the first battery cell 121 and the second battery cell 122, and then fix the thickening member 140 before the overlapping position of the first battery cell 121 and the second battery cell 122 using a heating device such as a soldering iron.

[0091] Specifically, the tooling process uses the tooling to position the plurality of thickening parts 140 , and then laminates the first plate 210 , the first adhesive film 220 , the plurality of thickening parts 140 , the plurality of battery cells 120 , the bottom plate 110 , the second adhesive film 240 and the second plate 230 to obtain the photovoltaic tile 200 .

[0092] like Figure 4 As shown, in some embodiments, optionally, along the length direction of the flexible member 130 , the thickening member 140 extends at least to two ends of the first battery cell 121 .

[0093] In this embodiment, along the length direction of the flexible member 130, the thickening member 140 extends at least to the two ends of the first battery cell 121, that is, along the length direction of the flexible member 130, the thickening member 140 extends to the two ends of the first battery cell 121, or, along the length direction of the flexible member 130, the thickening member 140 extends beyond the two ends of the first battery cell 121.

[0094] That is, the thickening member 140 is laid throughout the entire length before the overlapping position of the first battery cell 121 and the second battery cell 122 , thereby increasing the thickness of any overlapping position of adjacent battery cells 120 , further reducing the risk of the battery assembly 100 breaking during bending, and improving the process yield of the battery assembly 100 .

[0095] like Figure 3 As shown, in some embodiments, optionally, the width b of the thickening member 140 satisfies 2mm≤b≤10mm; and / or the thickness d1 of the thickening member 140 satisfies 0.3mm≤d1≤0.7mm; and / or the thickening member 140 includes one of an ethylene-vinyl acetate member, a polyolefin elastomer, a polyvinyl butyral member and a 2,4,6-trimethylbenzoyl-diphenylphosphine oxide member.

[0096] In this embodiment, the value range of the width of the thickening member 140 is limited. Specifically, the width of the thickening member 140 is between 2 mm and 10 mm. Thus, while covering the overlapping position of any adjacent battery cells 120, the amount of the thickening member 140 can be saved, thereby ensuring the production cost of the battery assembly 100.

[0097] It is understandable that if the width of the thickening member 140 is too small, that is, the width of the thickening member 140 is less than 2 mm, the thickness of the overlapping position of the adjacent battery cells 120 cannot be effectively increased, and the risk of the battery cells 120 breaking during the bending process of the battery assembly 100 increases. If the width of the thickening member 140 is too large, that is, the width of the thickening member 140 is greater than 10 mm, it will cause material waste and increase the production cost of the battery assembly 100.

[0098] The thickness of the thickening member 140 is between 0.3 mm and 0.7 mm, ensuring that the thickness of the overlapping position of adjacent battery cells 120 is effectively increased.

[0099] The thickening member 140 includes one of ethylene-vinyl acetate member, polyolefin elastomer, polyvinyl butyral member and 2,4,6-trimethylbenzoyl-diphenylphosphine oxide member. That is, the thickening member 140 includes one of ethylene-vinyl acetate copolymer (EVA) material, polyolefin elastomer (POE), polyvinyl butyral (PVB) material and 2,4,6-trimethylbenzoyl-diphenylphosphine oxide (TPO) material.

[0100] According to the second aspect of the utility model, a photovoltaic tile 200 is provided, including a battery assembly 100 as provided in any of the above embodiments, and thus has all the beneficial technical effects of the battery assembly 100, which will not be repeated here.

[0101] like Figure 5 As shown, further, the photovoltaic tile 200 also includes a first plate body 210, a first adhesive film 220, a second plate body 230 and a second adhesive film 240, wherein the first adhesive film 220 is arranged between the first plate body 210 and the battery assembly 100, the multiple battery cells 120 are located on the side of the bottom plate 110 facing the first adhesive film 220, the second plate body 230 is located on the side of the bottom plate 110 away from the multiple battery cells 120, and the second adhesive film 240 is arranged between the second plate body 230 and the bottom plate 110.

[0102] The photovoltaic tile 200 provided in the embodiment of the utility model includes a first plate body 210, a second plate body 230, a first adhesive film 220, a second adhesive film 240 and a battery assembly 100. Specifically, the first adhesive film 220 is arranged between the first plate body 210 and the battery assembly 100, and the plurality of battery cells 120 are located on the side of the bottom plate 110 facing the first adhesive film 220, that is, the light-receiving side of the plurality of battery cells 120 faces the first adhesive film 220.

[0103] The second adhesive film 240 is located between the second plate body 230 and the bottom plate 110 .

[0104] It can be understood that after the first plate 210 , the first adhesive film 220 , the battery assembly 100 , the second adhesive film 240 and the second plate 230 are stacked, vacuum lamination is used to form a whole, namely the photovoltaic tile 200 .

[0105] Optionally, the first plate body 210 includes a rigid curved plate, wherein the texture and color of the first plate body 210 can be set according to actual needs.

[0106] Optionally, the first plate body 210 includes ultra-clear curved tempered glass.

[0107] like Figure 5 As shown, in some embodiments, optionally, a water-blocking and weather-resistant layer 231 is provided on a side of the second plate 230 facing away from the second adhesive film 240 .

[0108] In this embodiment, a water-blocking and weather-resistant layer 231 is provided on one side of the second plate 230 facing away from the second adhesive film 240 , so that the photovoltaic tile 200 has water-blocking and weather-resistant properties.

[0109] Optionally, the water-blocking and weather-resistant layer 231 is a polymer material layer.

[0110] Optionally, the second plate body 230 is a composite PVDF / PET / PVDF three-layer coating structure, that is, the second plate body 230 uses PET (polyester resin) material as a substrate, and PVDF (polyvinylidene fluoride) material is coated on the outer side of the substrate.

[0111] In some embodiments, optionally, the thickness d2 of the first adhesive film 220 satisfies 0.3 mm ≤ d2 ≤ 0.7 mm; and / or the first adhesive film 220 includes one of ethylene-vinyl acetate parts, polyolefin elastomers, polyvinyl butyral parts and 2,4,6-trimethylbenzoyl-diphenylphosphine oxide parts; and / or the thickness d3 of the second adhesive film 240 satisfies 0.3 mm ≤ d3 ≤ 0.7 mm; and / or the second adhesive film 240 includes one of ethylene-vinyl acetate parts, polyolefin elastomers, polyvinyl butyral parts and 2,4,6-trimethylbenzoyl-diphenylphosphine oxide parts.

[0112] In this embodiment, the thickness of the first adhesive film 220 is between 0.3 mm and 0.7 mm.

[0113] The thickness of the second adhesive film 240 is between 0.3 mm and 0.7 mm.

[0114] The first adhesive film 220 includes one of ethylene-vinyl acetate parts, polyolefin elastomers, polyvinyl butyral parts and 2,4,6-trimethylbenzoyl-diphenylphosphine oxide parts, that is, the first adhesive film 220 includes one of ethylene-vinyl acetate copolymer (EVA) material, polyolefin elastomer (POE), polyvinyl butyral (PVB) material and 2,4,6-trimethylbenzoyl-diphenylphosphine oxide (TPO) material.

[0115] The second adhesive film 240 includes one of ethylene-vinyl acetate parts, polyolefin elastomers, polyvinyl butyral parts and 2,4,6-trimethylbenzoyl-diphenylphosphine oxide parts, that is, the second adhesive film 240 includes one of ethylene-vinyl acetate copolymer (EVA) material, polyolefin elastomer (POE), polyvinyl butyral (PVB) material and 2,4,6-trimethylbenzoyl-diphenylphosphine oxide (TPO) material.

[0116] In some embodiments, optionally, at least one of the bottom plate 110 , the first plate body 210 , and the second plate body 230 is configured as a rigid curved plate.

[0117] In this embodiment, at least one of the bottom plate 110, the first plate body 210, and the second plate body 230 is configured as a rigid curved plate, that is, the bottom plate 110 is a rigid curved plate, and the first plate body 210 and the second plate body 230 are both flexible plates. Alternatively, the bottom plate 110 and the first plate body 210 are both rigid curved plates, and the second plate body 230 is a flexible plate. Alternatively, the first plate body 210 is a rigid curved plate, and the bottom plate 110 and the second plate body 230 are both flexible plates. They are not listed here one by one.

[0118] By configuring at least one of the bottom plate 110 , the first plate body 210 and the second plate body 230 as a rigid curved plate, the manufactured photovoltaic tile 200 is a curved photovoltaic tile, thereby improving the aesthetics of the photovoltaic tile 200 .

[0119] It can be understood that after the first plate 210 , the first adhesive film 220 , the battery assembly 100 , the second adhesive film 240 and the second plate 230 are laminated, the curvatures of the materials fit each other.

[0120] In some embodiments, optionally, a radius R of curvature of the rigid curved panel satisfies 26 mm≤R≤200 mm; and / or the rigid curved panel includes a curved portion, and the number n of the curved portions satisfies 1≤n≤10.

[0121] In this embodiment, the radius of curvature of the rigid curved plate is between 26 mm and 200 mm.

[0122] The rigid curved panel includes a curved portion, and the number of the curved portions is between 1 and 10. It is understood that when the number of the curved portions is 1, the rigid curved panel is a single-peak curved panel. When the number of the curved portions is 2, the rigid curved panel is a single-peak-trough curved panel. When the number of the curved portions is greater than 2, the rigid curved panel is a multi-peak curved panel.

[0123] In the description of this specification, the terms "connection", "installation", "fixation" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0124] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0125] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A battery assembly, characterized in that: include: Base plate; A plurality of battery cells are disposed on the bottom plate, wherein the plurality of battery cells at least include a first battery cell and a second battery cell adjacent to each other, and a portion of the first battery cell overlaps a portion of the second battery cell; The flexible member is arranged at the overlapping portion of the first battery sheet and the second battery sheet and is located between the first battery sheet and the second battery sheet.

2. The battery assembly according to claim 1, characterized in that: Along the width direction of the flexible member, the first end of the flexible member exceeds the outer edge of the first battery cell; and / or Along the width direction of the flexible member, the second end of the flexible member exceeds the outer edge of the second battery sheet.

3. The battery assembly according to claim 1, characterized in that: Along the length direction of the flexible member, the flexible member at least extends to two ends of the first battery sheet.

4. The battery assembly according to any one of claims 1 to 3, characterized in that: The battery assembly further comprises: The thickening member is arranged at a side of the overlapped portion of the first battery cell and the second battery cell away from the bottom plate, and is connected to the first battery cell and the second battery cell.

5. The battery assembly according to claim 4, characterized in that: Along the length direction of the flexible member, the thickening member at least extends to two ends of the first battery sheet.

6. The battery assembly according to claim 4, characterized in that: The width b of the thickening member satisfies 2mm≤b≤10mm; and / or The thickness d1 of the thickening member satisfies 0.3 mm ≤ d1 ≤ 0.7 mm; and / or The thickening member includes one of an ethylene-vinyl acetate member, a polyolefin elastomer, a polyvinyl butyral member and a 2,4,6-trimethylbenzoyl-diphenylphosphine oxide member.

7. A photovoltaic tile, characterized in that: include: The battery assembly according to any one of claims 1 to 6; A first plate body; A first adhesive film is provided between the first plate and the battery assembly, and the plurality of battery cells are located on a side of the bottom plate facing the first adhesive film; A second plate body and a second adhesive film, wherein the second plate body is located at a side of the bottom plate away from the plurality of battery cells, and the second adhesive film is disposed between the second plate body and the bottom plate.

8. The photovoltaic tile according to claim 7, characterized in that: A water-blocking and weather-resistant layer is provided on a side of the second plate body facing away from the second adhesive film.

9. The photovoltaic tile according to claim 7, characterized in that: The thickness d2 of the first adhesive film satisfies 0.3 mm ≤ d2 ≤ 0.7 mm; and / or The first adhesive film comprises one of ethylene-vinyl acetate, polyolefin elastomer, polyvinyl butyral and 2,4,6-trimethylbenzoyl-diphenylphosphine oxide; and / or The thickness d3 of the second adhesive film satisfies 0.3 mm ≤ d3 ≤ 0.7 mm; and / or The second adhesive film includes one of ethylene vinyl acetate, polyolefin elastomer, polyvinyl butyral and 2,4,6-trimethylbenzoyl-diphenylphosphine oxide.

10. The photovoltaic tile according to any one of claims 7 to 9, characterized in that: At least one of the bottom plate, the first plate body, and the second plate body is configured as a rigid curved plate.

11. The photovoltaic tile according to claim 10, characterized in that: The curved surface radius R of the rigid curved plate satisfies 26 mm ≤ R ≤ 200 mm; and / or The rigid curved plate includes a curved portion, and the number n of the curved portions satisfies 1≤n≤10.

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