WO2021203984A1 - 光伏组件 - Google Patents

光伏组件 Download PDF

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Publication number
WO2021203984A1
WO2021203984A1 PCT/CN2021/083146 CN2021083146W WO2021203984A1 WO 2021203984 A1 WO2021203984 A1 WO 2021203984A1 CN 2021083146 W CN2021083146 W CN 2021083146W WO 2021203984 A1 WO2021203984 A1 WO 2021203984A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery
reflective
string
photovoltaic module
adjacent
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2021/083146
Other languages
English (en)
French (fr)
Inventor
毛剑宇
刘宣宣
董经兵
潘秀娟
黄甫阳
许涛
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canadian Solar Inc
CSI Cells Co Ltd
Canadian Solar Manufacturing Changshu Inc
Original Assignee
Canadian Solar Inc
CSI Cells Co Ltd
Canadian Solar Manufacturing Changshu Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202020493920.2U external-priority patent/CN211828793U/zh
Priority claimed from CN202120492359.0U external-priority patent/CN214505505U/zh
Application filed by Canadian Solar Inc, CSI Cells Co Ltd, Canadian Solar Manufacturing Changshu Inc filed Critical Canadian Solar Inc
Priority to EP21785021.3A priority Critical patent/EP4135054A4/en
Priority to JP2022561677A priority patent/JP7434600B2/ja
Publication of WO2021203984A1 publication Critical patent/WO2021203984A1/zh
Priority to US17/936,066 priority patent/US12107179B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
    • H10F19/00—Integrated devices, or assemblies of multiple devices, comprising at least one photovoltaic cell covered by group H10F10/00, e.g. photovoltaic modules
    • H10F19/70—Integrated devices, or assemblies of multiple devices, comprising at least one photovoltaic cell covered by group H10F10/00, e.g. photovoltaic modules comprising bypass diodes
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
    • H10F19/00—Integrated devices, or assemblies of multiple devices, comprising at least one photovoltaic cell covered by group H10F10/00, e.g. photovoltaic modules
    • H10F19/80—Encapsulations or containers for integrated devices, or assemblies of multiple devices, having photovoltaic cells
    • H10F19/807—Double-glass encapsulation, e.g. photovoltaic cells arranged between front and rear glass sheets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
    • H02S40/30—Electrical components
    • H02S40/34—Electrical components comprising specially adapted electrical connection means to be structurally associated with the PV module, e.g. junction boxes
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
    • H10F19/00—Integrated devices, or assemblies of multiple devices, comprising at least one photovoltaic cell covered by group H10F10/00, e.g. photovoltaic modules
    • H10F19/80—Encapsulations or containers for integrated devices, or assemblies of multiple devices, having photovoltaic cells
    • H10F19/85—Protective back sheets
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
    • H10F19/00—Integrated devices, or assemblies of multiple devices, comprising at least one photovoltaic cell covered by group H10F10/00, e.g. photovoltaic modules
    • H10F19/90—Structures for connecting between photovoltaic cells, e.g. interconnections or insulating spacers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
    • H10F77/00—Constructional details of devices covered by this subclass
    • H10F77/40—Optical elements or arrangements
    • H10F77/42—Optical elements or arrangements directly associated or integrated with photovoltaic cells, e.g. light-reflecting means or light-concentrating means
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
    • H02S40/20—Optical components
    • H02S40/22—Light-reflecting or light-concentrating means
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
    • H10F19/00—Integrated devices, or assemblies of multiple devices, comprising at least one photovoltaic cell covered by group H10F10/00, e.g. photovoltaic modules
    • H10F19/80—Encapsulations or containers for integrated devices, or assemblies of multiple devices, having photovoltaic cells
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
    • H10F77/00—Constructional details of devices covered by this subclass
    • H10F77/40—Optical elements or arrangements
    • H10F77/42—Optical elements or arrangements directly associated or integrated with photovoltaic cells, e.g. light-reflecting means or light-concentrating means
    • H10F77/488—Reflecting light-concentrating means, e.g. parabolic mirrors or concentrators using total internal reflection
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/52—PV systems with concentrators

Definitions

  • the present disclosure relates to the field of photovoltaic technology, and in particular, to a photovoltaic module.
  • the present disclosure aims to solve at least one of the technical problems existing in the prior art.
  • one purpose of the present disclosure is to provide a photovoltaic module, which can reduce the current mismatch effect of the cells and improve the reliability of the photovoltaic module.
  • the photovoltaic module includes: a battery cell layer, the battery cell layer includes a plurality of battery cells arranged along the battery sheet arrangement direction in the string, each of the battery cells includes A plurality of battery strings arranged in a string arrangement direction perpendicular to the arrangement direction of the battery slices, each battery string includes a plurality of battery slices connected in series and arranged along the arrangement direction of the battery slices in the string; a back cover plate , The back cover is provided on the back side of the battery cell layer, and at least one junction box is provided on the side of the back cover away from the battery cell layer, and the junction boxes are located in two adjacent Between the battery cells, and the junction box shields at least one of the battery slices of at least one of the battery cells; a light-reflecting layer, the light-reflecting layer is provided between the battery cell layer and the back cover, the The light-reflective layer includes a plurality of light-reflective longitudinal strips, the plurality of the light-reflective longitudinal strips are spaced apart from
  • a battery cell layer, a back cover plate, and a reflective layer including a plurality of reflective longitudinal strips are provided, and each reflective longitudinal strip covers the edge of at least one cell in the battery string. At least one of the reflective longitudinal strips is cut off adjacent to the battery slice that is blocked by the junction box to form at least one opening.
  • the opening can avoid blocking the battery slice, thereby effectively reducing the current mismatch effect of the battery slice and ensuring The reliability of photovoltaic modules; on the other hand, it can reduce the material cost of photovoltaic modules.
  • the opening is located at the battery slice that is blocked by the junction box, and the light-receiving area of the battery slice in the battery cell that is blocked by the junction box is related to the light-receiving area of the battery cell.
  • the light-receiving areas of the other cells are the same.
  • two adjacent battery slices of each battery string adjacent to the junction box are a first battery slice and a second battery slice, and the second battery slice is located in the The side of the first battery piece away from the junction box; the two adjacent battery units are the first battery unit and the second battery unit respectively; one end of the opening is located at the battery of the first battery unit Between the first battery slice and the second battery slice of the string, the other end of the opening is located at the first battery slice and the second battery slice of the battery string of the second battery unit between.
  • the width of the battery sheet in the arrangement direction of the battery sheet in the string is D
  • the length of the portion of the opening located in the first battery cell is d
  • all the reflective longitudinal bars have one opening.
  • the plurality of the reflective longitudinal strips includes: two edge reflective strips, the two edge reflective strips are located at the edge of the battery cell layer along the string arrangement direction, and each The edge reflective strips cover the edges of the battery slices in the corresponding battery string; at least one middle reflective strip, the middle reflective strip is located between the two edge reflective strips, and the middle reflective strips are located on two adjacent ones. Between two of the battery strings and covering the edges of the battery pieces in the two adjacent battery strings.
  • the light-reflecting layer further includes: a plurality of first light-reflecting horizontal bars, and the plurality of first light-reflecting horizontal bars are connected in two spaced apart from each other along the array direction of the cells in the string. Between the edge reflective strips, each of the first reflective horizontal strips extends along the string arrangement direction and covers the edge of the corresponding battery sheet.
  • the first reflective horizontal bar is provided between every two adjacent battery slices along the arrangement direction of the battery slices in the string, so The first reflective horizontal strip covers the edges of the corresponding two adjacent battery slices in all battery strings.
  • the width of each of the first reflective horizontal bars is smaller than the width of each of the reflective vertical bars.
  • the width of the first reflective horizontal bar is W 1 , wherein the W 1 satisfies: 0mm ⁇ W 1 ⁇ 6mm.
  • the light-reflecting layer further includes: a second light-reflecting horizontal bar, the second light-reflecting horizontal bar is located between two adjacent battery cells, and the second light-reflecting horizontal bar extends along the The string arrangement direction extends, and the second reflective horizontal strip covers the edges of the adjacent battery sheets of the two adjacent battery cells.
  • the junction box is opposite to one of the plurality of reflective longitudinal bars, the opening is formed on the one of the plurality of reflective longitudinal bars, and the opening is A penetrating wire-passing hole, the wire-passing hole is directly opposite to the junction box.
  • the plurality of reflective longitudinal strips includes a plurality of first reflective strips and a plurality of second reflective strips, and one of the first reflective strips is provided between two adjacent second reflective strips.
  • each of the first reflective strips has the opening, and the length of the opening of the first reflective strip is smaller than the length of the opening of the second reflective strip.
  • the length of the opening is L, where the L satisfies: 0mm ⁇ L ⁇ 500mm.
  • the distance between two adjacent battery slices in each battery string is d, where d satisfies: 0mm ⁇ d ⁇ 2mm.
  • the width of each reflective longitudinal strip is W 2, wherein W 2 satisfies: 2mm ⁇ W 2 ⁇ 15mm.
  • the reflective layer is a reflective coating coated on a side surface of the back cover adjacent to the battery cell layer; or between the back cover and the battery cell layer An encapsulation adhesive film is arranged in between, and the reflective layer is arranged on the encapsulation adhesive film.
  • the length of each of the reflective longitudinal strips is a
  • the maximum distance between the two solar cells with the furthest distance in the arrangement direction of the cells in the string is b
  • the a and b satisfy: 0.7 ⁇ a/b ⁇ 1.3.
  • each battery cell there are two battery cells, the two battery cells are connected in parallel, and each battery cell includes six battery strings connected in series, along the string arrangement direction, Every two adjacent battery strings is a battery string group; the number of the junction boxes is three, and each of the junction boxes is respectively located between the two battery strings of the corresponding battery string group.
  • FIG. 1 is a schematic diagram of the structure of a light-reflecting layer according to an embodiment of the present disclosure
  • FIG. 2 is a schematic diagram of the front structure of a photovoltaic module according to an embodiment of the present disclosure
  • Fig. 3 is a schematic circuit diagram of a photovoltaic module according to an embodiment of the present disclosure
  • Fig. 4 is a schematic diagram of an exploded structure of a photovoltaic module according to an embodiment of the present disclosure
  • FIG. 5 is a schematic structural diagram of a light-reflecting layer according to another embodiment of the present disclosure.
  • Fig. 6 is a schematic view from another angle of a photovoltaic module according to an embodiment of the present disclosure.
  • 100 photovoltaic module
  • 10 battery cell layer
  • 1111 the first cell
  • 1112 the second cell
  • 412 Middle reflective strip
  • 413 Wire hole
  • 414 First reflective strip
  • 415 second reflective bar; 42: first reflective horizontal bar; 43: second reflective horizontal bar;
  • first and second are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined with “first” and “second” may explicitly or implicitly include one or more of these features. Further, in the description of the present disclosure, unless otherwise specified, “plurality” means two or more.
  • the photovoltaic module 100 according to an embodiment of the present disclosure will be described below with reference to FIGS. 1 to 6.
  • the photovoltaic module 100 includes a battery cell layer 10, a back cover 2 and a light reflecting layer 4.
  • the battery cell layer 10 includes a plurality of battery cells 1 arranged along the arrangement direction of the battery sheets 111 in the string, and each battery cell 1 includes a plurality of battery cells 1 arranged along the string arrangement direction perpendicular to the arrangement direction of the battery sheets 111 in the string.
  • "plurality" means two or more.
  • the "arrangement direction of battery slices 111 in a string” can be understood as the arrangement direction of a plurality of battery slices 111 in each battery string 11 (for example, the up-down direction in FIGS. 1 and 2);
  • the "string arrangement direction” is a direction perpendicular to the "string arrangement direction of the battery pieces 111" (for example, the left-right direction in FIGS. 1 and 2).
  • each battery cell 1 can be connected in parallel, each battery cell 1 includes six battery strings 11, and each battery cell 1 has six battery strings 11 Can be connected in series.
  • Each battery string 11 may include eleven battery pieces 111 connected in series, and two adjacent battery pieces 111 in each battery string 11 may be connected by a special-shaped solder ribbon.
  • the photovoltaic module 100 may include a front transparent plate 7, and the battery cell layer 10 is provided under the front transparent plate 7.
  • the above-mentioned front surface refers to the main light-receiving surface of the cell 111, that is, the surface of the cell 111 or the photovoltaic module 100 that directly receives sunlight, and the back surface is the surface opposite to the front surface.
  • FIG. 2 shows two battery cells 1, each battery cell 1 includes six battery strings 11 and each battery string 11 includes eleven battery slices 111 for illustrative purposes, but ordinary technicians read this After applying the technical solution, it is obviously understandable that the solution is applied to technical solutions of other numbers of battery cells 1, battery strings 11, and battery slices 111, and this also falls within the protection scope of the present disclosure.
  • the back cover 2 is provided on the back side of the battery cell layer 10, and at least one junction box 3 is provided on the side of the back cover 2 away from the battery cell layer 10, and the junction box 3 is located between two adjacent battery cells 1, and
  • the junction box 3 shields at least one battery sheet 111 of at least one battery unit 1.
  • the junction box 3 can shield at least one battery slice 111 in one battery unit 1, and can also shield at least one battery slice 111 in two adjacent battery units 1 at the same time.
  • the back cover 2 may be a transparent plate such as a glass plate, so that both the front and back of the photovoltaic module 100 can effectively absorb and scatter sunlight, thereby effectively improving the efficiency of power generation.
  • every two adjacent battery strings 11 is a battery string group 12, and each battery unit 1 includes three battery strings arranged in sequence along the string arrangement direction.
  • the light-reflecting layer 4 is provided between the battery cell layer 10 and the back cover 2.
  • the light-reflecting layer 4 includes a plurality of light-reflecting longitudinal strips 41 which are spaced apart from each other along the string arrangement direction.
  • the battery strips 111 in the string extend in the arrangement direction, and each reflective longitudinal strip 41 covers at least one edge of the battery strips 111 in the battery string 11.
  • seven reflective longitudinal strips 41 are shown, and the seven reflective longitudinal strips 41 can be arranged at even intervals along the string arrangement direction.
  • each reflective vertical strip 41 covers the edge of the cell 111 in at least one cell string 11, the photovoltaic module 100 can be prevented from being exposed, so that the power of the photovoltaic module 100 can be further increased, and the sun's light from the edge of the cell string 11 can be avoided.
  • the gaps between the reflective longitudinal bars 41 are transmitted through.
  • At least one of the plurality of reflective longitudinal bars 41 is cut off adjacent to the battery sheet 111 shielded by the junction box 3 to form at least one opening 5.
  • the reflective longitudinal strip 41 when the reflective longitudinal strip 41 shields the battery string 11, the reflective longitudinal strip 41 will shield all the cells 111 of the battery string 11, which will result in the battery that is blocked by the junction box 3.
  • the shielding area of the sheet 111 is too large, which consumes the power of the other battery sheets 111 that are not shielded in the battery unit 1, thereby causing the temperature of the shielding position to rise, and a hot spot phenomenon occurs.
  • the opening 5 can be avoided.
  • the shielding of the cell 111 is used to balance the shielding of the cell 111 by the junction box 3, which effectively reduces the current mismatch effect of the cell 111, improves the long-term reliability of the photovoltaic module 100, and ensures the double-sidedness of the photovoltaic module 100 Rate.
  • the opening 5 can reduce the area of the reflective layer 4, thereby reducing the consumption of auxiliary materials of the back cover 2 and effectively reducing the cost.
  • the battery cell layer 10, the back cover 2 and the reflective layer 4 including a plurality of reflective longitudinal strips 41 are provided, and each reflective longitudinal strip 41 covers at least one battery in the battery string 11
  • the edge of the sheet 111, and at least one of the plurality of reflective longitudinal strips 41 is cut off adjacent to the battery sheet 111 shielded by the junction box 3 to form at least one opening 5.
  • the opening 5 can prevent the battery sheet 111 from being damaged.
  • the shielding can effectively reduce the current mismatch effect of the cell 111 and ensure the reliability of the photovoltaic module 100; on the other hand, the material cost of the photovoltaic module 100 can be reduced.
  • the opening 5 is located at the cell 111 covered by the junction box 3.
  • the light-receiving area of the cell 111 in the cell 1 covered by the junction box 3 and the battery cell The light-receiving areas of the other cells 111 in 1 are equal.
  • the shielding area of the battery sheet 111 shielded by the junction box 3 can be equal to the shielding area of the remaining battery sheets 111 in the battery unit 1 that are shielded by the reflective vertical bars 41, so that the battery unit 1 shielded by the junction box 3
  • the light-receiving area of all the solar cells 111 inside are equal, which can effectively avoid the current mismatch effect of the solar cells 111 and improve the long-term reliability of the photovoltaic module 100.
  • the adjacent two battery slices 111 of each battery string 11 adjacent to the junction box 3 are the first battery slice 1111 and the second battery slice 1112, and the second battery slice 1112 It is located on the side of the first cell 1111 away from the junction box 3.
  • Two adjacent battery units 1 are the first battery unit and the second battery unit respectively.
  • One end of the opening 5 is located between the first battery piece 1111 and the second battery piece 1112 of the battery string 11 of the first battery unit.
  • the other end is located between the first cell piece 1111 and the second cell piece 1112 of the battery string 11 of the second battery unit.
  • two adjacent battery slices 111 of each battery string 11 can be spaced apart, and at this time, the above-mentioned end of the opening 5 can be connected to the first battery slice 1111 of the first battery unit adjacent to the second battery.
  • One side edge of the sheet 1112 is flush; or, the above-mentioned end of the opening 5 is located at the gap between the first battery sheet 1111 and the second battery sheet 1112 of the first battery unit; of course, the above-mentioned end of the opening 5 can also be connected to the first battery
  • the edge of the second cell 1112 of the unit adjacent to the first cell 1111 is flush.
  • the above-mentioned other end of the opening 5 may be flush with the edge of the first battery piece 1111 of the second battery unit adjacent to the second battery piece 1112 and with the edge of the second battery piece 1112 of the second battery unit adjacent to the first battery unit.
  • One side edge of the battery sheet 1111 is flush or located at the gap between the first battery sheet 1111 and the second battery sheet 1112 of the second battery unit.
  • the entire first battery sheet 1111 blocked by the junction box 3 can correspond to the opening 5, so that the first reflective longitudinal strip 41 can completely avoid the first battery sheet 1111 blocked by the junction box 3, thereby
  • the opening 5 can effectively balance the shielding of the first cell 1111 by the junction box 3, so that the shielding area of all the cells 111 in the battery unit 1 is consistent, and the double-sided ratio of the photovoltaic module 100 is ensured.
  • first opening The opening 5 between the second battery pieces 1112 is referred to as the "first opening”. It should be noted that when there are a plurality of openings 5 and the plurality of openings 5 include the first opening, all the openings 5 may be the first opening, or a part of the plurality of openings 5 may be the first opening.
  • all the reflective longitudinal strips 41 have an opening 5.
  • all the first battery slices 1111 of each battery cell 1 can avoid the shielding of the reflective longitudinal bars 41, so that the area of each first battery slice 1111 blocked by the junction box 3 is the same as that of the same battery cell.
  • the remaining solar cells 111 in 1 have the same area covered by the reflective vertical bars 41, which can effectively reduce the current mismatch effect of the solar cells 111 and ensure the output power of the photovoltaic module 100.
  • the width of the battery sheet 111 in the arrangement direction of the battery sheet 111 in the string is D
  • the length of the portion of the opening 5 located in the first battery cell is d
  • the cell 111 can be one-half of the complete cell 111, which can reduce internal loss, increase the output power of the photovoltaic module 100, help reduce the cost per watt, and facilitate the battery Processing of slice 111.
  • the plurality of reflective longitudinal strips 41 include two edge reflective strips 411 and at least one middle reflective strip 412.
  • two edge reflective strips 411 are located at the edge of the battery cell layer 10 along the string arrangement direction, each edge reflective strip 411 covers the edge of the battery sheet 111 in the corresponding battery string 11, and the middle reflective strip 412 is located at the two edge reflective edges.
  • the middle reflective bar 412 is located between the two adjacent battery strings 11 and covers the edges of the battery sheets 111 in the two adjacent battery strings 11 described above.
  • seven reflective longitudinal strips 41 are shown, and the seven reflective longitudinal strips 41 include two edge reflective strips 411 and five middle reflective strips 412.
  • each edge reflective strip 411 may be greater than the width of the middle reflective strip 412. Since the edge of the battery cell layer 10 has an electrical gap to ensure the safety of the photovoltaic module 100, by making the width of the edge reflective strip 411 larger, the electrical gap can be effectively covered. Thus, by arranging the edge reflective strips 411 and the middle reflective strips 412, the edge reflective strips 411 can reduce the amount of sunlight transmitted from the edge of the battery cell layer 10 along the string arrangement direction, and the middle reflective strips 412 can reduce the sun. The amount of light transmitted from the gap between two adjacent battery strings 11 can improve the light utilization rate of the photovoltaic module 100 while ensuring the uniformity of the appearance of the photovoltaic module 100, making the appearance of the photovoltaic module 100 more neat and beautiful .
  • electrical clearance refers to the shortest spatial distance measured between two conductive parts or between the conductive parts and the equipment protection interface, that is, through the air under the condition of ensuring stable and safe electrical performance.
  • the reflective layer 4 further includes a plurality of first reflective horizontal bars 42 which are arranged along the array direction of the cells 111 in the string. Spacedly connected between the two edge reflective strips 411, each first reflective horizontal strip 42 extends along the string arrangement direction and covers the edge of the corresponding battery sheet 111.
  • the two edge reflective strips 411 may be a first edge reflective strip and a second edge reflective strip, respectively.
  • the plurality of first reflective horizontal bars 42 includes two edge horizontal bars and a plurality of middle horizontal bars, and the plurality of middle horizontal bars are located between the two edge horizontal bars.
  • one end of one of the two edge horizontal strips is connected to one end of the first edge reflective strip, and the other end is connected to one end of the second edge reflective strip, and one end of the other of the two edge horizontal strips is connected to the first edge reflective strip.
  • the other end of the edge reflective strip is connected, and the other end is connected with the other end of the second edge reflective strip.
  • the width of each edge horizontal bar may be greater than the width of the middle horizontal bar to cover the electrical gap. Therefore, by arranging the above-mentioned multiple first reflective horizontal bars 42, it is possible to reduce the sunlight from the edge of the battery cell layer 10 along the arrangement direction of the battery slices 111 in the string and/or the two adjacent batteries in the battery string 11.
  • the amount of transmission at the gaps between the sheets 111 can further increase the light utilization rate, thereby increasing the power and bifacial ratio of the photovoltaic module 100.
  • a first reflective horizontal line is provided between every two adjacent battery slices 111.
  • the strip 42, the first reflective horizontal strip 42 covers the edges of the corresponding two adjacent battery slices 111 in all the battery strings 11.
  • This arrangement can effectively prevent the photovoltaic module 100 from being white in the gap between the two adjacent cells 111 in the battery string 11, and can effectively prevent the sunlight incident on the front of the photovoltaic module 100 from coming from two adjacent ones in the battery string 11.
  • the gaps between the cells 111 are transmitted away, so that the front power of the photovoltaic module 100 can be effectively increased, and the appearance consistency of the photovoltaic module 100 can be further improved.
  • the width of each first reflective horizontal strip 42 may be smaller than the width of each reflective vertical strip 41. Therefore, by making the width of the first reflective horizontal strips 42 smaller, the consumption of auxiliary materials of the back cover 2 can be further reduced, so that the cost of the photovoltaic module 100 can be further reduced. Moreover, the gap between two adjacent battery slices 111 in each battery string 11 can be smaller, so that the arrangement of the battery slices 111 can be more compact, and a larger number of battery slices can be arranged in a space of a certain size. 111, in turn, the output power of the photovoltaic module 100 can be effectively increased.
  • each first reflective horizontal bar 42 can be understood as each first reflective horizontal bar 42 (that is, each middle horizontal bar) located between two adjacent battery sheets 111. It can be understood that the width of each edge horizontal strip may be greater than or equal to the width of the reflective vertical strip 41.
  • the width of the first reflective horizontal bar 42 is W 1 , where W 1 satisfies: 0 mm ⁇ W 1 ⁇ 6 mm.
  • W 1 satisfies: 0 mm ⁇ W 1 ⁇ 6 mm.
  • W 1 satisfies: 0 mm ⁇ W 1 ⁇ 6 mm.
  • W 1 satisfies: 0 mm ⁇ W 1 ⁇ 6 mm.
  • W 1 satisfies: 0 mm ⁇ W 1 ⁇ 6 mm.
  • W 1 satisfies: 0 mm ⁇ W 1 ⁇ 6 mm.
  • the reflective layer 4 further includes a second reflective horizontal bar 43, the second reflective horizontal bar 43 is located between two adjacent battery cells 1, and the second reflective horizontal bar 43 runs along the string The arrangement direction extends, and the second reflective horizontal strip 43 covers the edges of the adjacent battery sheets 111 of the two adjacent battery cells 1.
  • the width of the second reflective horizontal bar 43 is equal to the width of the gap between two adjacent battery cells 1.
  • the two battery cells 1 The plurality of first battery pieces 1111 cover the corresponding edges of the second reflective horizontal bar 43; when viewed from the back of the photovoltaic module 100, the width of the second reflective horizontal bar 43 is greater than the gap between two adjacent battery cells 1 At this time, the second reflective horizontal strip 43 covers the edges of the first battery slices 1111 of the two battery units 1. Therefore, by arranging the above-mentioned second reflective horizontal bars 43, the sunlight incident on the front of the photovoltaic module 100 can be prevented from being transmitted from the gap between two adjacent battery cells 1, thereby further improving the light utilization rate and improving The front power of the photovoltaic module 100.
  • the width of the second reflective horizontal bar 43 is greater than the width of each first reflective horizontal bar 42, and the width of the second reflective horizontal bar 43 is greater than the width of each reflective vertical bar.
  • the width of strip 41 Therefore, since the junction box 3 is arranged between two adjacent battery units 1, by making the width of the second reflective horizontal bar 43 greater than the width of the first reflective horizontal bar 42 and the reflective vertical bar 41, on the one hand, the adjacent Leave enough space between the two battery cells 1 to place the junction box 3 to prevent the junction box 3 from shielding the cell 111 from being too large. On the other hand, it is ensured that the second reflective horizontal strip 43 can cover the corresponding cell 111. Edge, so as to ensure the front power of the photovoltaic module 100.
  • a central bus bar 6 is provided in the battery cell layer 10, and the central bus bar 6 is located between two adjacent battery cells 1.
  • the central bus bars 6 are connected in parallel, the central bus bars 6 extend along the string arrangement direction, and the width of the central bus bars 6 is smaller than the width of the second reflective horizontal bars 43.
  • the width of the central bus bar 6 may be smaller than the width of the gap between two adjacent battery cells 1.
  • the central bus bar 6 may include a first lead-out section, a second lead-out section, and two central confluence sections.
  • the two adjacent battery strings 11 of the two adjacent battery string groups 12 on the same side of the bar 6 are connected in series by a central busbar.
  • the battery strings 11 are connected in parallel through a central bus section.
  • the three junction boxes 3 are respectively located between the first lead-out section and the adjacent central confluence section, between two adjacent central confluence sections, and between the second lead-out section and the adjacent central confluence section. Therefore, by providing the above-mentioned central bus bar 6, the central bus bar 6 can realize the parallel connection between two adjacent battery cells 1, which is beneficial to reduce the design and process difficulty, and has a simple structure.
  • the junction box 3 is opposed to one of the plurality of reflective longitudinal bars 41, and the above-mentioned opening 5 is formed on one of the plurality of reflective longitudinal bars 41, and the above-mentioned opening 5 is The through hole 413 is directly opposite to the junction box 3.
  • the wire hole 413 can avoid blocking the battery sheet 111, thereby reducing the total shielding area of the battery sheet 111 shielded by the junction box 3, and reducing the battery sheet 111 Current mismatch effect; on the other hand, the above-mentioned wire hole 413 can enable the junction box 3 to protect the photovoltaic module 100 while conducting the current generated by the photovoltaic module 100 for use by the user.
  • the plurality of reflective longitudinal strips 41 includes a plurality of first reflective strips 414 and a plurality of second reflective strips 415, and two adjacent second reflective strips A first reflective strip 414 is provided between 415.
  • the photovoltaic module 100 uses a three-part junction box 3, that is to say, there are three junction boxes 3.
  • the reflective layer 4 includes seven reflective longitudinal strips 41, and the seven reflective longitudinal strips 41 include three first reflective stripes 414 and four second reflective stripes 415.
  • the three first reflective strips 414 and the four second reflective strips 415 are arranged alternately.
  • the three junction boxes 3 are opposite to the three first reflective strips 414.
  • the four second reflective strips 415 are all disconnected and form four openings 5.
  • each second reflective strip 415 has an opening 5
  • each first reflective strip 414 has an opening 5 (not shown in the figure), and the length of the opening 5 of the first reflective strip 414 is smaller than the length of the opening 5 of the second reflective strip 415.
  • the opening 5 of the first reflective strip 414 can also avoid blocking the cell 111, further ensuring that the blocking area of all the cells 111 in the cell unit 1 that is blocked by the junction box 3 is equal, and ensuring the reliability of the photovoltaic module 100 sex.
  • the length of the opening 5 is L, where L satisfies: 0mm ⁇ L ⁇ 500mm. Therefore, by making L satisfy: 0mm ⁇ L ⁇ 500mm, and the length of the opening 5 is reasonable, while ensuring that the shielding area of all the cells 111 in the battery unit 1 that is shielded by the junction box 3 is equal, it can be ensured that the photovoltaic module 100 has Higher power.
  • L further satisfies: 100mm ⁇ L ⁇ 300mm.
  • L ⁇ 100mm the length of the opening 5 is too small, which may cause the reflective longitudinal strip 41 to shield the battery sheet 111 that is blocked by the junction box 3 too large, so that the battery sheet blocked by the junction box 3
  • the light-receiving area of 111 is smaller than the light-receiving area of the remaining cells 111 in the battery unit 1, resulting in current mismatch; when L>300mm, the length of the opening 5 is too long, so that the length of the reflective longitudinal strip 41 except for the opening 5 is too short.
  • the power of the photovoltaic module 100 may be reduced.
  • the distance between two adjacent battery slices 111 in each battery string 11 is d, where d satisfies: 0mm ⁇ d ⁇ 2mm.
  • d satisfies: 0mm ⁇ d ⁇ 2mm.
  • the distance between two adjacent battery slices 111 in the same battery string 11 is zero, that is to say, there is no distance between two adjacent battery slices 111 in each battery string 11 Spacing connection;
  • the distance d satisfy: 0mm ⁇ d ⁇ 2mm, the gap between two adjacent battery slices 111 in each battery string 11 is small or no gap, and the arrangement of multiple battery slices 111 is more compact and convenient With the electrical connection between adjacent cells 111, the size of the photovoltaic module 100 can be smaller, so that the efficiency of the photovoltaic module 100 can be improved and the cost of auxiliary materials of the photovoltaic module 100 can be reduced.
  • each reflector 41 is vertical bar width W 2, wherein W 2 satisfies: 2mm ⁇ W 2 ⁇ 15mm.
  • W 2 satisfies: 2mm ⁇ W 2 ⁇ 15mm.
  • W 2 satisfies: 2mm ⁇ W 2 ⁇ 15mm.
  • W 2 satisfies: 2mm ⁇ W 2 ⁇ 15mm.
  • W 2 satisfies: 2mm ⁇ W 2 ⁇ 15mm.
  • W 2 satisfies: 2mm ⁇ W 2 ⁇ 15mm.
  • W 2 may further satisfy 2mm ⁇ W 2 ⁇ 10mm. But it is not limited to this.
  • the width of the outermost two first reflective horizontal strips 42 in the arrangement direction of the battery sheets 111 in the string may be greater than the width of the middle reflective strip 412.
  • the width of the two edge horizontal strips is greater than the width of the middle reflective strip 412. Since the outermost two first reflective horizontal bars 42 in the arrangement direction of the battery slices 111 in the string are located at the edge of the battery cell layer 10, the two outermost first reflective bars 42 in the arrangement direction of the battery slices 111 in the string are thus arranged.
  • the reflective horizontal bars 42 can cover the above-mentioned electrical gaps to ensure the light utilization rate of the photovoltaic module 100.
  • the light-reflective layer 4 may be a light-reflective coating (not shown in the figure) coated on a surface of the back cover 2 adjacent to the battery cell layer 10.
  • the reflective layer 4 can increase the front power and the back power at the same time, thereby improving the double-sided ratio of the photovoltaic module 100, and the reflective layer 4 and the back cover 2 are integrated into an integrated structure, which is convenient for processing.
  • an encapsulating adhesive film 9 is provided between the back cover 2 and the battery cell layer 10, and the reflective layer 4 is provided on the encapsulating adhesive film 9.
  • the light-reflecting layer 4 may be embedded in the packaging adhesive film 9, and the surface of the light-reflecting layer 4 is flush with the surface on one side in the thickness direction of the packaging adhesive film 9.
  • a white polymer material can be compounded in a transparent polymer material using the shape of the reflective layer 4 as a template.
  • the packaging adhesive film 9 may be one or more of ethylene-vinyl acetate, polyolefin materials, and polyethylene foamed cotton. In this way, there is no difference in thickness between the reflective layer 4 and the encapsulating adhesive film 9, which can effectively avoid the problem of laminate cracks of the photovoltaic module 100, and can improve the yield of the photovoltaic module 100.
  • the present disclosure is not limited to this, and the light-reflecting layer 4 can also be adhesively connected to the back cover 2 through an adhesive.
  • the back cover 2 is made of glass and the line holes 413 are processed on the reflective longitudinal strip 41, the back cover 2 is likely to burst.
  • the reflective layer 4 can be processed in advance, and then the reflective layer 4 can be glued to the back cover 2. As a result, it is possible to avoid affecting the structural strength of the back cover 2 and thus to ensure the structural stability of the photovoltaic module 100.
  • the reflective layer 4 can also be printed on one side surface of the encapsulation film 9. It should be understood by those skilled in the art that the preparation method of the reflective layer 4 is not limited here, as long as it is ensured that the reflective layer 4 is provided on the back side of the battery cell layer 10.
  • the reflective layer 4 may be a titanium dioxide piece, a white glaze piece or a white polymer material piece.
  • the back cover 2 or the encapsulation film 9 can have a white reflective layer 4, which can increase the light utilization rate, increase the power and double-sided ratio of the photovoltaic module 100, and increase the power on the back of the double-glass photovoltaic module 100 Gain.
  • the material of the reflective layer 4 can also be other materials similar to white glaze, which is not limited here.
  • the photovoltaic module 100 may have a symmetrical structure that is symmetrical in the arrangement direction of the cells 111 in the string.
  • the photovoltaic module 100 has a symmetrical structure up and down.
  • the photovoltaic module 100 may be symmetrical (as shown in FIG. 2 and FIG. 3), or asymmetrical, as long as the photovoltaic module 100 has a vertical symmetrical structure. Therefore, by making the photovoltaic module 100 a symmetrical structure, the structure is simple, easy to process, and has a high aesthetic appearance.
  • At least one end of the vertical bar 41 extends beyond the outermost edge of at least one of the two battery slices 111 furthest apart in the arrangement direction of the battery slices 111 in the string. Such a setting can ensure that the photovoltaic module 100 has a better light utilization rate.
  • the manufacturing process of the photovoltaic module 100 will be described below with reference to FIG. 4.
  • the packaging adhesive film 9 is a back packaging adhesive film 9.
  • the photovoltaic module 100 includes a front transparent plate 7, a front encapsulation film 8, a battery cell layer 10, an encapsulation film 9 and a back cover 2 in order from top to bottom.
  • the laminated five-layer structure including the front transparent plate 7, the front encapsulation film 8, the battery cell layer 10, the encapsulation film 9 and the back cover 2 is vacuum-heated and laminated to make the front encapsulation film 8 It is cross-linked and cured with the encapsulation film 9 to protect the battery cell layer 10, and finally realize a five-layer structure (that is, the front transparent plate 7, the front encapsulation film 8, the battery cell layer 10, the encapsulation film 9 and the back cover 2 ) Is firmly bonded, and the photovoltaic module 100 is completed by adding an aluminum alloy frame (not shown in the figure), the junction box 3, and sealing with silica gel.

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Abstract

一种光伏组件(100)，包括电池单元层(10)、背面盖板(2)和反光层(4)。背面盖板(2)设在电池单元层(10)的背面侧，背面盖板(2)的远离电池单元层(10)的一侧设有至少一个接线盒(3)，反光层(4)设在电池单元层(10)和背面盖板(2)之间，反光层(4)包括多个反光纵条(41)，每个反光纵条(41)覆盖至少一个电池串(11)内电池片(111)的边缘，多个反光纵条(41)中的至少一个在邻近被接线盒(3)遮挡的电池片(111)处断开以形成至少一个开口(5)。

Description

光伏组件 技术领域
本公开涉及光伏技术领域，具体而言，涉及一种光伏组件。
背景技术
随着光伏组件市场需求的迅速增长，用户对光伏组件的要求越来越高，在保证光伏组件具有较高的效率的同时，需要光伏组件也可以满足多种场地、不同安装环境的要求。因此，双玻光伏组件应运而生。相关技术中，双玻光伏组件背面由于接线盒遮挡电池片，容易出现电池片电流失配的问题，从而导致光伏组件的可靠性较低。
发明内容
本公开旨在至少解决现有技术中存在的技术问题之一。为此，本公开的一个目的在于提出一种光伏组件，所述光伏组件可以降低电池片的电流失配效应，提高光伏组件的可靠性。
根据本公开实施例的光伏组件，包括：电池单元层，所述电池单元层包括沿串内电池片排布方向排布的多个电池单元，每个所述电池单元包括沿与所述串内电池片排布方向垂直的串排布方向排布的多个电池串，每个所述电池串包括串联连接且沿所述串内电池片排布方向排布的多个电池片；背面盖板，所述背面盖板设在所述电池单元层的背面侧，所述背面盖板的远离所述电池单元层的一侧设有至少一个接线盒，所述接线盒位于相邻两个所述电池单元之间，且所述接线盒遮挡至少一个所述电池单元的至少一个所述电池片；反光层，所述反光层设在所述电池单元层和所述背面盖板之间，所述反光层包括多个反光纵条，多个所述反光纵条沿所述串排布方向彼此间隔开，每个所述反光纵条沿所述串内电池片排布方向延伸，每个所述反光纵条覆盖至少一个所述电池串内所述电池片的边缘，多个所述反光纵条中的至少一个在邻近被所述接线盒遮挡的所述电池片处断开以形成至少一个开口。
根据本公开实施例的光伏组件，通过设置电池单元层、背面盖板和包括多个反光纵条的反光层，并使每个反光纵条覆盖至少一个电池串内电池片的边缘，且多个反光纵条中的至少一个在邻近被接线盒遮挡的电池片处断开以形成至少一个开口，一方面，开口处可以避免对电池片的遮挡，从而有效降低电池片的电流失配效应，保证光伏组件的可靠性；另一方面，可以降低光伏组件的用料成本。
根据本公开的一些实施例，所述开口位于被所述接线盒遮挡的所述电池片处，被所述接线盒遮挡的所述电池单元内的所述电池片的受光面积与所述电池单元内的其它所述电池片的受光面积相等。
根据本公开的一些实施例，每个所述电池串的邻近所述接线盒的相邻两个所述电池片分别为第一电池片和第二电池片，所述第二电池片位于所述第一电池片的远离所述接线盒的一侧； 相邻两个所述电池单元分别为第一电池单元和第二电池单元；所述开口的一端位于所述第一电池单元的所述电池串的所述第一电池片和所述第二电池片之间，所述开口的另一端位于所述第二电池单元的所述电池串的所述第一电池片和所述第二电池片之间。
根据本公开的一些实施例，所述电池片的在所述串内电池片排布方向上的宽度为D，所述开口的位于所述第一电池单元内的部分的长度为d，其中，所述d、D满足：d＝D，82mm≤D≤120mm。
根据本公开的一些实施例，所有的所述反光纵条均具有一个所述开口。
根据本公开的一些实施例，多个所述反光纵条包括：两个边缘反光条，两个所述边缘反光条位于所述电池单元层的沿所述串排布方向的边缘，每个所述边缘反光条覆盖对应的所述电池串内所述电池片的边缘；至少一个中间反光条，所述中间反光条位于两个所述边缘反光条之间，所述中间反光条位于相邻两个所述电池串之间且覆盖所述相邻两个所述电池串内所述电池片的边缘。
根据本公开的一些实施例，所述反光层进一步包括：多个第一反光横条，多个所述第一反光横条沿所述串内电池片排布方向彼此间隔开地连接在两个所述边缘反光条之间，每个所述第一反光横条沿所述串排布方向延伸且覆盖对应的所述电池片的边缘。
根据本公开的一些实施例，每个所述电池单元内，沿所述串内电池片排布方向、每相邻两个所述电池片之间均设有所述第一反光横条，所述第一反光横条覆盖所有电池串中对应的相邻两个所述电池片的边缘。
根据本公开的一些实施例，每个所述第一反光横条的宽度小于每个所述反光纵条的宽度。
根据本公开的一些实施例，所述第一反光横条的宽度为W 1，其中，所述W 1满足：0mm＜W 1≤6mm。
根据本公开的一些实施例，所述反光层进一步包括：第二反光横条，所述第二反光横条位于相邻两个所述电池单元之间，所述第二反光横条沿所述串排布方向延伸，所述第二反光横条覆盖所述相邻两个所述电池单元的相邻的所述电池片的边缘。
根据本公开的一些实施例，所述接线盒与多个所述反光纵条中的其中一个相对，多个所述反光纵条中的所述其中一个上形成有所述开口，所述开口为贯通的过线孔，所述过线孔与所述接线盒正对。
根据本公开的一些实施例，多个所述反光纵条包括多个第一反光条和多个第二反光条，相邻两个所述第二反光条之间设有一个所述第一反光条；所述接线盒为多个，多个所述接线盒与多个所述第一反光条一一对应设置，每个所述第二反光条均具有所述开口。
根据本公开的一些实施例，每个所述第一反光条均具有所述开口，且所述第一反光条的所述开口的长度小于所述第二反光条的所述开口的长度。
根据本公开的一些实施例，所述开口的长度为L，其中所述L满足：0mm＜L≤500mm。
根据本公开的一些实施例，每个所述电池串中的相邻两个所述电池片之间的距离为d，其 中所述d满足：0mm≤d≤2mm。
根据本公开的一些实施例，每个所述反光纵条的宽度为W 2，其中所述W 2满足：2mm≤W 2≤15mm。
根据本公开的一些实施例，所述反光层为涂覆在所述背面盖板的邻近所述电池单元层的一侧表面的反光涂层；或所述背面盖板与所述电池单元层之间设有封装胶膜，所述反光层设在所述封装胶膜上。
根据本公开的一些实施例，每个所述反光纵条的长度为a，在所述串内电池片排布方向上、距离最远的两个所述电池片之间的最大距离为b，其中，所述a，b满足：0.7≤a/b≤1.3。
根据本公开的一些实施例，所述电池单元为两个，两个所述电池单元并联连接，每个所述电池单元包括串联连接的六个所述电池串，沿所述串排布方向、每相邻两个所述电池串为一个电池串组；所述接线盒为三个，每个所述接线盒分别位于对应的所述电池串组的两个所述电池串之间。
本公开的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本公开的实践了解到。
附图说明
本公开的上述和/或附加的方面和优点从结合下面附图对实施例的描述中将变得明显和容易理解，其中：
图1是根据本公开实施例的反光层的结构示意图；
图2是根据本公开实施例的光伏组件的正面结构示意图；
图3是根据本公开实施例的光伏组件的电路示意图；
图4是根据本公开实施例的光伏组件的爆炸结构示意图；
图5是根据本公开另一个实施例的反光层的结构示意图；
图6是根据本公开实施例的光伏组件的另一个角度的示意图。
附图标记：
100：光伏组件；10：电池单元层；
1：电池单元；11：电池串；111：电池片；
1111：第一电池片；1112：第二电池片；
12：电池串组；2：背面盖板；3：接线盒；
4：反光层；41：反光纵条；411：边缘反光条；
412：中间反光条；413：过线孔；414：第一反光条；
415：第二反光条；42：第一反光横条；43：第二反光横条；
5：开口；6：中心汇流条；7：正面透明板；
8：正面封装胶膜；9：封装胶膜。
具体实施方式
下面详细描述本公开的实施例，所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，仅用于解释本公开，而不能理解为对本公开的限制。
在本公开的描述中，需要理解的是，术语“中心”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本公开和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本公开的限制。
需要说明的是，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。进一步地，在本公开的描述中，除非另有说明，“多个”的含义是两个或两个以上。
下面详细描述本公开的实施例，参考附图描述的实施例是示例性的，下面详细描述本公开的实施例。
下面参考图1-图6描述根据本公开实施例的光伏组件100。
如图2所示，根据本公开实施例的光伏组件100，包括电池单元层10、背面盖板2和反光层4。
其中，电池单元层10包括沿串内电池片111排布方向排布的多个电池单元1，每个电池单元1包括沿与串内电池片111排布方向垂直的串排布方向排布的多个电池串11，每个电池串11包括串联连接且沿串内电池片111排布方向排布的多个电池片111。在本公开的描述中，“多个”的含义是两个或两个以上。
这里，需要说明的是，“串内电池片111排布方向”可以理解为每个电池串11内的多个电池片111的排布方向(例如，图1和图2中的上下方向)；“串排布方向”为与“串内电池片111排布方向”垂直的方向(例如，图1和图2中的左右方向)。
例如，在图2的示例中示出了两个电池单元1，两个电池单元1可以并联连接，每个电池单元1包括六个电池串11，且每个电池单元1的六个电池串11可以串联连接。每个电池串11可以包括串联连接的十一个电池片111，每个电池串11内相邻两个电池片111之间可以通过异形焊带连接。可选地，光伏组件100可以包括正面透明板7，电池单元层10设在正面透明板7的下方。其中，上述正面指的是电池片111的主要受光面，即，电池片111或光伏组件100直接接收太阳光的面，背面是与正面相对的面。
图2中显示了两个电池单元1、每个电池单元1包括六个电池串11且每个电池串11包括 十一个电池片111用于示例说明的目的，但是普通技术人员在阅读了本申请的技术方案之后、显然可以理解将该方案应用到其它数量的电池单元1、电池串11和电池片111的技术方案中，这也落入本公开的保护范围之内。
背面盖板2设在电池单元层10的背面侧，背面盖板2的远离电池单元层10的一侧设有至少一个接线盒3，接线盒3位于相邻两个电池单元1之间，且接线盒3遮挡至少一个电池单元1的至少一个电池片111。也就是说，接线盒3可以遮挡一个电池单元1中的至少一个电池片111，也可以同时遮挡相邻两个电池单元1中的至少一个电池片111。可选地，背面盖板2可以为透明板例如玻璃板，这样光伏组件100的正面和背面均可以有效地吸收和散射太阳光，从而可以有效提高发电效益。
例如，在图1和图2的示例中，沿串排布方向、每相邻两个电池串11为一个电池串组12，每个电池单元1包括沿串排布方向依次排布的三个电池串组12。接线盒3为三个，每个接线盒3分别位于对应的电池串组12的两个电池串11之间。这样，分体式的接线盒3可以减少线缆的数量，降低结温。由此，通过设置上述的接线盒3，可以对线缆起到较好的保护作用，防止外部的水以及灰尘等杂质进入接线盒3内，可以提高光伏组件100的可靠性。
反光层4设在电池单元层10和背面盖板2之间，反光层4包括多个反光纵条41，多个反光纵条41沿串排布方向彼此间隔开，每个反光纵条41沿串内电池片111排布方向延伸，每个反光纵条41覆盖至少一个电池串11内电池片111的边缘。例如，在图2的示例中示出了七个反光纵条41，七个反光纵条41可以沿串排布方向均匀间隔设置。由此，通过设置上述的反光层4，可以避免入射到光伏组件100正面的太阳光被大量透射掉，提高光伏组件100的正面功率，从而可以有效提高光线利用率，提高光伏组件100的功率和双面率。而且，由于每个反光纵条41覆盖至少一个电池串11内的电池片111的边缘，可以避免光伏组件100露白，从而可以进一步提高光伏组件100的功率，避免太阳光从电池串11的边缘和反光纵条41之间的间隙透射掉。
多个反光纵条41中的至少一个在邻近被接线盒3遮挡的电池片111处断开以形成至少一个开口5。例如，对于现有的光伏组件100而言，当反光纵条41遮挡电池串11时，反光纵条41会遮挡该电池串11的所有电池片111，这样就会导致被接线盒3遮挡的电池片111的遮挡面积过多，消耗该电池单元1中未被遮挡的其他电池片111的功率，从而导致该遮挡位置温度升高，出现热斑现象。
由此，通过多个反光纵条41中的至少一个在邻近被接线盒3遮挡的电池片111处断开以形成至少一个开口5，与现有的光伏组件100相比，开口5处可以避免对电池片111的遮挡，以用于平衡接线盒3对电池片111的遮挡，有效降低了电池片111的电流失配效应，提高了光伏组件100的长期可靠性，保证光伏组件100的双面率。而且，开口5可以减小反光层4的面积，从而可以降低背面盖板2的辅材的消耗量，有效降低成本。
根据本公开实施例的光伏组件100，通过设置电池单元层10、背面盖板2和包括多个反光 纵条41的反光层4，并使每个反光纵条41覆盖至少一个电池串11内电池片111的边缘，且多个反光纵条41中的至少一个在邻近被接线盒3遮挡的电池片111处断开以形成至少一个开口5，一方面，开口5处可以避免对电池片111的遮挡，从而有效降低电池片111的电流失配效应，保证光伏组件100的可靠性；另一方面，可以降低光伏组件100的用料成本。
在本公开的一些实施例中，结合图1和图2，开口5位于被接线盒3遮挡的电池片111处，被接线盒3遮挡的电池单元1内的电池片111的受光面积与电池单元1内的其它电池片111的受光面积相等。如此设置，被接线盒3遮挡的电池片111的遮挡面积可以与该电池单元1内的其余被反光纵条41遮挡的电池片111的遮挡面积相等，从而使被接线盒3遮挡的电池单元1内的所有电池片111的受光面积均相等，可以有效避免电池片111出现电流失配效应，提高光伏组件100的长期可靠性。
在本公开的一些实施例中，参照图2，每个电池串11的邻近接线盒3的相邻两个电池片111分别为第一电池片1111和第二电池片1112，第二电池片1112位于第一电池片1111的远离接线盒3的一侧。相邻两个电池单元1分别为第一电池单元和第二电池单元，开口5的一端位于第一电池单元的电池串11的第一电池片1111和第二电池片1112之间，开口5的另一端位于第二电池单元的电池串11的第一电池片1111和第二电池片1112之间。
例如，结合图1和图2，每个电池串11的相邻两个电池片111可以间隔设置，此时开口5的上述一端可以与第一电池单元的第一电池片1111的邻近第二电池片1112的一侧边缘平齐；或者，开口5的上述一端位于第一电池单元的第一电池片1111和第二电池片1112的间隙处；当然，开口5的上述一端也可以与第一电池单元的第二电池片1112的邻近第一电池片1111的一侧边缘平齐。类似地，开口5的上述另一端可以与第二电池单元的第一电池片1111的邻近第二电池片1112的一侧边缘平齐、与第二电池单元的第二电池片1112的邻近第一电池片1111的一侧边缘平齐或位于第二电池单元的第一电池片1111和第二电池片1112的间隙处。由此，通过上述设置，被接线盒3遮挡的整个第一电池片1111可以均与开口5对应，使第一反光纵条41可以完全避开被接线盒3遮挡的第一电池片1111，从而使开口5可以有效平衡接线盒3对第一电池片1111的遮挡，使电池单元1内的所有电池片111的遮挡面积一致，保证光伏组件100的双面率。
为了方便描述，将上述“一端位于第一电池单元的电池串11的第一电池片1111和第二电池片1112之间且另一端位于第二电池单元的电池串11的第一电池片1111和第二电池片1112之间”的开口5称为“第一开口”。需要说明的是，当开口5为多个且多个开口5包括第一开口时，可以是所有的开口5均为第一开口，也可以是多个开口5中的其中一部分为第一开口。
在本公开的进一步实施例中，结合图1和图2，所有的反光纵条41均具有一个开口5。例如，在图1和图2的示例中示出了七个开口5，七个开口5均为第一开口，七个开口5的位于接线盒3同一侧的端部可以平齐。由此，通过上述设置，每个电池单元1的所有第一电池片 1111均可以避开反光纵条41的遮挡，从而使每个第一电池片1111被接线盒3遮挡的面积与同一电池单元1内的其余电池片111被反光纵条41遮挡的面积相等，可以有效降低电池片111的电流失配效应，保证光伏组件100的输出功率。
在本公开的一些实施例中，电池片111的在串内电池片111排布方向上的宽度为D，开口5的位于第一电池单元内的部分的长度为d，其中，d、D满足：d＝D，82mm≤D≤120mm。由此，通过使d＝D，开口5可以与第一电池单元内被接线盒3遮挡的电池片111彼此相对，从而使第一电池单元内的所有电池片111的受光面积可以均相等，保证光伏组件100的可靠性。而且，通过使82mm≤D≤120mm，电池片111可以为完整电池片111的二分之一，从而可以减少内损，提高光伏组件100的输出功率，有助于降低单瓦成本，且方便电池片111的加工。
在本公开的一些实施例中，参照图2，多个反光纵条41包括两个边缘反光条411和至少一个中间反光条412。其中，两个边缘反光条411位于电池单元层10的沿串排布方向的边缘，每个边缘反光条411覆盖对应的电池串11内电池片111的边缘，中间反光条412位于两个边缘反光条411之间，中间反光条412位于相邻两个电池串11之间且覆盖上述相邻两个电池串11内电池片111的边缘。例如，在图2的示例中示出了七个反光纵条41，七个反光纵条41包括两个边缘反光条411和五个中间反光条412。其中，每个边缘反光条411的宽度可以大于中间反光条412的宽度。由于电池单元层10的边缘有电气间隙以保证光伏组件100的安全性，通过使边缘反光条411的宽度较大，可以有效覆盖电气间隙。由此，通过设置上述的边缘反光条411和中间反光条412，边缘反光条411可以降低太阳光从电池单元层10的沿串排布方向的边缘处的透射量，中间反光条412可以降低太阳光从相邻两个电池串11之间的间隙处的透射量，在提高光伏组件100的光线利用率的同时，可以保证光伏组件100的外观的一致性，使光伏组件100的外观更加整齐美观。
需要说明的是，上述“电气间隙”是指在两个导电零部件之间或导电零部件与设备防护界面之间测得的最短空间距离，即在保证电气性能稳定和安全的情况下，通过空气能实现绝缘的最短距离。
在本公开的进一步实施例中，如图1和图2所示，反光层4进一步包括多个第一反光横条42，多个第一反光横条42沿串内电池片111排布方向彼此间隔开地连接在两个边缘反光条411之间，每个第一反光横条42沿串排布方向延伸且覆盖对应的电池片111的边缘。例如，在图2的示例中，两个边缘反光条411可以分别为第一边缘反光条和第二边缘反光条。多个第一反光横条42包括两个边缘横条和多个中间横条，多个中间横条位于两个边缘横条之间。其中，两个边缘横条中的其中一个的一端与第一边缘反光条的一端相连、且另一端与第二边缘反光条的一端相连，两个边缘横条中的另一个的一端与第一边缘反光条的另一端相连、且另一端与第二边缘反光条的另一端相连。每个边缘横条的宽度可以大于中间横条的宽度，以覆盖电气间隙。由此，通过设置上述的多个第一反光横条42，可以降低太阳光从电池单元层10的沿 串内电池片111排布方向的边缘和/或电池串11内的相邻两个电池片111之间的间隙处的透射量，可以进一步提高光线利用率，从而提高光伏组件100的功率和双面率。
在本公开的一些实施例中，结合图1和图2，每个电池单元1内，沿串内电池片111排布方向、每相邻两个电池片111之间均设有第一反光横条42，第一反光横条42覆盖所有电池串11中对应的相邻两个电池片111的边缘。如此设置，可以有效避免光伏组件100在电池串11内相邻两个电池片111之间的间隙处露白，可以有效避免入射到光伏组件100正面的太阳光从电池串11内的相邻两个电池片111之间的间隙处被透射掉，从而可以有效提高光伏组件100的正面功率，且可以进一步提高光伏组件100的外观一致性。
可选地，参照图1和图2，每个第一反光横条42的宽度可以小于每个反光纵条41的宽度。由此，通过使第一反光横条42的宽度较小，可以进一步降低背面盖板2辅材的消耗量，从而可以进一步降低光伏组件100的成本。而且，每个电池串11内相邻两个电池片111之间的间隙可以较小，从而使电池片111的排布可以更加紧凑，在一定尺寸的空间内可以排布更多数量的电池片111，进而可以有效提高光伏组件100的输出功率。
需要说明的是，上述“每个第一反光横条42”可以理解为位于相邻两个电池片111之间的每个第一反光横条42(即每个中间横条)。可以理解的是，每个边缘横条的宽度可以大于或等于反光纵条41的宽度。
在本公开的一些可选实施例中，第一反光横条42的宽度为W 1，其中，W 1满足：0mm＜W 1≤6mm。例如，当W 1＞6mm时，每个第一反光横条42的宽度过大，可能会导致对对应的电池片111的遮挡面积过大，且会提高光伏组件100的成本。由此，通过使W 1满足：0mm＜W 1≤6mm，在保证光伏组件100的光线利用率，提高光伏组件100的输出功率的同时，可以有效避免对电池片111的遮挡面积过大，且可以有效降低成本。
在本公开的一些实施例中，参照图2，反光层4进一步包括第二反光横条43，第二反光横条43位于相邻两个电池单元1之间，第二反光横条43沿串排布方向延伸，第二反光横条43覆盖上述相邻两个电池单元1的相邻的电池片111的边缘。例如，结合图1和图2，当从光伏组件100的正面进行观察时，第二反光横条43的宽度与相邻两个电池单元1之间的间隙宽度相等，此时两个电池单元1的多个第一电池片1111覆盖第二反光横条43的对应边缘；当从光伏组件100的背面进行观察时，第二反光横条43的宽度大于相邻两个电池单元1之间的间隙的宽度，此时第二反光横条43覆盖两个电池单元1的多个第一电池片1111的边缘。由此，通过设置上述的第二反光横条43，可以避免入射到光伏组件100正面的太阳光从相邻两个电池单元1之间的间隙处透射掉，从而可以进一步提高光线利用率，提高光伏组件100的正面功率。
在本公开的一些可选实施例中，如图2所示，第二反光横条43的宽度大于每个第一反光横条42的宽度，第二反光横条43的宽度大于每个反光纵条41的宽度。由此，由于接线盒3设在相邻两个电池单元1之间，通过使第二反光横条43的宽度大于第一反光横条42和反光 纵条41的宽度，一方面可以使相邻两个电池单元1之间预留足够的间隙以放置接线盒3，避免接线盒3对电池片111的遮挡面积过大，另一方面保证第二反光横条43可以覆盖对应的电池片111的边缘，从而保证光伏组件100的正面功率。
在本公开的一些实施例中，参照图1和图2，电池单元层10内设有中心汇流条6，中心汇流条6位于相邻两个电池单元1之间，相邻两个电池单元1通过中心汇流条6并联连接，中心汇流条6沿串排布方向延伸，中心汇流条6的宽度小于第二反光横条43的宽度。
例如，在图1的示例中，中心汇流条6的宽度可以小于相邻两个电池单元1之间的间隙宽度。其中，中心汇流条6可以包括第一引出段、第二引出段和两个中心汇流段，第一引出段、两个中心汇流段和第二引出段沿串排布方向依次设置，位于中心汇流条6同一侧的相邻两个电池串组12的相邻两个电池串11之间通过中心汇流段串联连接，沿串内电池片111排布方向、位于中心汇流条6异侧的两个电池串11通过中心汇流段并联连接。三个接线盒3分别位于第一引出段与相邻的中心汇流段之间、相邻两个中心汇流段之间、以及第二引出段与相邻的中心汇流段之间。由此，通过设置上述的中心汇流条6，中心汇流条6可以实现相邻两个电池单元1之间的并联连接，有利于降低设计和工艺难度，且结构简单。
可选地，参照图5并结合图6，接线盒3与多个反光纵条41中的其中一个相对，多个反光纵条41中的上述其中一个上形成有上述开口5，上述开口5为贯通的过线孔413，过线孔413与接线盒3正对。由此，通过设置上述的过线孔413，一方面，过线孔413可以避免对电池片111的遮挡，从而减小被接线盒3遮挡的电池片111的总遮挡面积，降低电池片111的电流失配效应；另一方面，上述过线孔413可以使接线盒3在保护光伏组件100的同时，将光伏组件100产生的电流传导出来供用户使用。
在本公开的一些具体实施例中，如图5和图6所示，多个反光纵条41包括多个第一反光条414和多个第二反光条415，相邻两个第二反光条415之间设有一个第一反光条414。接线盒3为多个，多个接线盒3与多个第一反光条414一一对应设置，每个第二反光条415均具有开口5。
例如，在图5和图6的示例中，光伏组件100采用三分体接线盒3，也就是说接线盒3为三个。反光层4包括七个反光纵条41，七个反光纵条41包括三个第一反光条414和四个第二反光条415。三个第一反光条414和四个第二反光条415交错设置。三个接线盒3与三个第一反光条414相对。四个第二反光条415均断开并形成四个开口5。由此，通过使每个第二反光条415均具有开口5，可以保证被接线盒3遮挡的电池单元1内的所有电池片111的遮挡面积相等，从而有效避免接线盒3遮挡背面电池片111带来的可靠性风险。
可选地，每个第一反光条414均具有开口5(图未示出)，且第一反光条414的开口5的长度小于第二反光条415的开口5的长度。如此设置，第一反光条414的开口5同样可以避免对电池片111的遮挡，进一步保证了被接线盒3遮挡的电池单元1内的所有电池片111的遮挡面积相等，保证光伏组件100的可靠性。
在本公开的一些实施例中，开口5的长度为L，其中L满足：0mm＜L≤500mm。由此，通过使L满足：0mm＜L≤500mm，开口5的长度合理，在保证被接线盒3遮挡的电池单元1内的所有电池片111的遮挡面积相等的同时，可以保证光伏组件100具有较高的功率。
在本公开的进一步实施例中，L进一步满足：100mm≤L≤300mm。具体地，例如，当L＜100mm时，开口5的长度过小，可能导致反光纵条41对被接线盒3遮挡的电池片111的遮挡面积过大，从而使被接线盒3遮挡的电池片111的受光面积小于电池单元1内其余电池片111的受光面积，产生电流失配；当L＞300mm时，开口5的长度过长，使反光纵条41的除开口5以外的长度过短，可能会降低光伏组件100的功率。由此，通过使L满足：100mm≤L≤300mm，开口5的长度合理，一方面，可以保证被接线盒3遮挡的电池单元1内的所有电池片111的受光面积均相等；另一方面，可以进一步提高光伏组件100的输出功率。
在本公开的一些实施例中，每个电池串11中的相邻两个电池片111之间的距离为d，其中d满足：0mm≤d≤2mm。例如，当距离d＝0mm时，同一个电池串11中的相邻两个电池片111之间的距离为零，也就是说每个电池串11中的相邻两个电池片111之间无间距连接；当d＝2mm时，同一个电池串11中的相邻两个电池片111之间的距离为2mm，每个电池串11中的多个电池片111间隔设置；当0mm＜d＜2mm时，同一个电池串11中的相邻两个电池片111之间小间距连接。由此，通过使距离d满足：0mm≤d≤2mm，每个电池串11中的相邻两个电池片111之间间隙较小或无间隙，多个电池片111的排布更加紧凑，便于相邻电池片111之间的电连接，光伏组件100的尺寸可以较小，从而可以提高光伏组件100的效率，降低光伏组件100的辅料成本。
可选地，每个反光纵条41的宽度为W 2，其中W 2满足：2mm≤W 2≤15mm。例如，当宽度W 2＜2mm时，每个反光纵条41的宽度过小，可能会无法覆盖相邻两个电池串11之间的间隙，降低光伏组件100的功率；当W 2＞15mm时，每个反光纵条41的宽度过大，可能会导致对电池片111的遮挡面积过大。由此，通过使W 2满足：2mm≤W 2≤15mm，在保证光伏组件100具有较高的功率的同时，可以有效避免对电池片111的遮挡面积过大。进一步可选地，W 2可以进一步满足2mm≤W 2≤10mm。但不限于此。
在本公开的一些实施例中，结合图2和图5，在串内电池片111排布方向上最外侧的两个第一反光横条42的宽度可以大于中间反光条412的宽度。例如，在图2和图5的示例中，两个边缘横条的宽度均大于中间反光条412的宽度。由于在串内电池片111排布方向上最外侧的两个第一反光横条42位于电池单元层10的边缘，如此设置的在串内电池片111排布方向上最外侧的两个第一反光横条42可以覆盖上述电气间隙，保证光伏组件100的光线利用率。
可选地，反光层4可以为涂覆在背面盖板2的邻近电池单元层10的一侧表面的反光涂层(图未示出)。如此设置，反光层4可以同时提高正面功率和背面功率，从而提升光伏组件100的双面率，且反光层4与背面盖板2为一体结构，便于加工。
或者可选地，如图4所示，背面盖板2与电池单元层10之间设有封装胶膜9，反光层4 设在封装胶膜9上。具体地，反光层4可以嵌设在封装胶膜9内，且反光层4的表面与封装胶膜9的厚度方向上一侧的表面平齐。例如，可以在透明的高分子材料中以反光层4的形状为模板复合进白色的高分子材料。其中，封装胶膜9可以为乙烯-醋酸乙烯酯、聚烯烃类材料和聚乙烯发泡棉中的一种或多种。如此，反光层4与封装胶膜9之间不存在厚度差，可以有效避免出现光伏组件100层压裂片的问题，可以提高光伏组件100的良率。
当然，本公开不限于此，反光层4还可以通过粘接剂与背面盖板2粘接连接。例如，当背面盖板2为玻璃且在反光纵条41上加工过线孔413时，背面盖板2容易爆裂。此时可以将反光层4提前加工好，然后将反光层4粘到背面盖板2上。由此，可以避免影响背面盖板2的结构强度，从而可以保证光伏组件100的结构稳定性。
当然，反光层4还可以印刷在封装胶膜9的一侧表面上。本领域技术人员应当理解的是，在这里对反光层4的制备方式不作任何限定，只要保证反光层4设在电池单元层10的背面侧即可。
可选地，反光层4可以为二氧化钛件、白釉件或白色高分子材料件。如此设置，使背面盖板2或封装胶膜9上可以具有白色反光层4，从而可以提高光线利用率，提高光伏组件100的功率和双面率，且可以提高双玻光伏组件100背面的功率增益。当然，反光层4的材料也可以为其它类似白釉的材料，在这里不作限定。
可选地，光伏组件100可以为在串内电池片111排布方向上对称的对称结构。例如，在图2和图3的示例中，光伏组件100为上下对称结构。其中，光伏组件100可以左右对称(如图2和图3所示)，也可以左右不对称，只要保证光伏组件100为上下对称结构即可。由此，通过使光伏组件100为对称结构，结构简单，便于加工，且具有较高的外形美观性。
在本公开的一些可选实施例中，每个反光纵条41的长度为a，在串内电池片111排布方向上、距离最远的两个电池片111之间的最大距离为b，其中，a，b满足：0.7≤a/b≤1.3。具体地，例如，当a/b＝0.7时，反光纵条41的长度小于在串内电池片111排布方向上、距离最远的两个电池片111之间的最大距离，例如反光纵条41可以具有开口5；当a/b＝1.3时，反光纵条41的长度大于在串内电池片111排布方向上、距离最远的两个电池片111之间的最大距离，此时反光纵条41的至少一端超出在串内电池片111排布方向上、距离最远的两个电池片111中的至少一个的最外侧的边缘。如此设置，可以保证光伏组件100具有较好的光线利用率。
下面结合图4描述光伏组件100的制作过程。
如图4所示，封装胶膜9为背面封装胶膜9。光伏组件100从上而下依次为正面透明板7、正面封装胶膜8、电池单元层10、封装胶膜9和背面盖板2。制作光伏组件100时，首先将正面透明板7、正面封装胶膜8、电池单元层10、封装胶膜9和背面盖板2依次摆放好，以完成双玻光伏组件100的层压前准备工作。然后将叠层好的包括正面透明板7、正面封装胶膜8、电池单元层10、封装胶膜9和背面盖板2的五层结构经过抽真空加热层压后，使正面封装胶膜8和封装胶膜9交联固化，以将电池单元层10保护起来，最终实现五层结构(即正面透明 板7、正面封装胶膜8、电池单元层10、封装胶膜9和背面盖板2)的牢靠粘接，并通过加装铝合金边框(图未示出)、接线盒3以及采用硅胶密封后完成光伏组件100的制作。
根据本公开实施例的光伏组件100的其他构成以及操作对于本领域普通技术人员而言都是已知的，这里不再详细描述。
在本说明书的描述中，参考术语“一个实施例”、“一些实施例”、“示意性实施例”、“示例”、“具体示例”、或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本公开的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任何的一个或多个实施例或示例中以合适的方式结合。
尽管已经示出和描述了本公开的实施例，本领域的普通技术人员可以理解：在不脱离本公开的原理和宗旨的情况下可以对这些实施例进行多种变化、修改、替换和变型，本公开的范围由权利要求及其等同物限定。

Claims (20)

  1. 一种光伏组件，其特征在于，包括：
    电池单元层，所述电池单元层包括沿串内电池片排布方向排布的多个电池单元，每个所述电池单元包括沿与所述串内电池片排布方向垂直的串排布方向排布的多个电池串，每个所述电池串包括串联连接且沿所述串内电池片排布方向排布的多个电池片；
    背面盖板，所述背面盖板设在所述电池单元层的背面侧，所述背面盖板的远离所述电池单元层的一侧设有至少一个接线盒，所述接线盒位于相邻两个所述电池单元之间，且所述接线盒遮挡至少一个所述电池单元的至少一个所述电池片；
    反光层，所述反光层设在所述电池单元层和所述背面盖板之间，所述反光层包括多个反光纵条，多个所述反光纵条沿所述串排布方向彼此间隔开，每个所述反光纵条沿所述串内电池片排布方向延伸，每个所述反光纵条覆盖至少一个所述电池串内所述电池片的边缘，多个所述反光纵条中的至少一个在邻近被所述接线盒遮挡的所述电池片处断开以形成至少一个开口。
  2. 根据权利要求1所述的光伏组件，所述开口位于被所述接线盒遮挡的所述电池片处，被所述接线盒遮挡的所述电池单元内的所述电池片的受光面积与所述电池单元内的其它所述电池片的受光面积相等。
  3. 根据权利要求1或2所述的光伏组件，其特征在于，每个所述电池串的邻近所述接线盒的相邻两个所述电池片分别为第一电池片和第二电池片，所述第二电池片位于所述第一电池片的远离所述接线盒的一侧；
    相邻两个所述电池单元分别为第一电池单元和第二电池单元；
    所述开口的一端位于所述第一电池单元的所述电池串的所述第一电池片和所述第二电池片之间，所述开口的另一端位于所述第二电池单元的所述电池串的所述第一电池片和所述第二电池片之间。
  4. 根据权利要求3所述的光伏组件，所述电池片的在所述串内电池片排布方向上的宽度为D，所述开口的位于所述第一电池单元内的部分的长度为d，其中，所述d、D满足：d＝D，82mm≤D≤120mm。
  5. 根据权利要求3或4所述的光伏组件，其特征在于，所有的所述反光纵条均具有一个所述开口。
  6. 根据权利要求1-5中任一项所述的光伏组件，其特征在于，多个所述反光纵条包括：
    两个边缘反光条，两个所述边缘反光条位于所述电池单元层的沿所述串排布方向的边缘，每个所述边缘反光条覆盖对应的所述电池串内所述电池片的边缘；
    至少一个中间反光条，所述中间反光条位于两个所述边缘反光条之间，所述中间反光条位于相邻两个所述电池串之间且覆盖所述相邻两个所述电池串内所述电池片的边缘。
  7. 根据权利要求6所述的光伏组件，其特征在于，所述反光层进一步包括：
    多个第一反光横条，多个所述第一反光横条沿所述串内电池片排布方向彼此间隔开地连接在两个所述边缘反光条之间，每个所述第一反光横条沿所述串排布方向延伸且覆盖对应的所述电池片的边缘。
  8. 根据权利要求7所述的光伏组件，其特征在于，每个所述电池单元内，
    沿所述串内电池片排布方向、每相邻两个所述电池片之间均设有所述第一反光横条，所述第一反光横条覆盖所有电池串中对应的相邻两个所述电池片的边缘。
  9. 根据权利要求7或8所述的光伏组件，其特征在于，每个所述第一反光横条的宽度小于每个所述反光纵条的宽度。
  10. 根据权利要求7-9中任一项所述的光伏组件，其特征在于，所述第一反光横条的宽度为W 1，其中，所述W 1满足：0mm＜W 1≤6mm。
  11. 根据权利要求7-10中任一项所述的光伏组件，其特征在于，所述反光层进一步包括：
    第二反光横条，所述第二反光横条位于相邻两个所述电池单元之间，所述第二反光横条沿所述串排布方向延伸，所述第二反光横条覆盖所述相邻两个所述电池单元的相邻的所述电池片的边缘。
  12. 根据权利要求1-11中任一项所述的光伏组件，其特征在于，所述接线盒与多个所述反光纵条中的其中一个相对，多个所述反光纵条中的所述其中一个上形成有所述开口，所述开口为贯通的过线孔，所述过线孔与所述接线盒正对。
  13. 根据权利要求1-12中任一项所述的光伏组件，其特征在于，多个所述反光纵条包括多个第一反光条和多个第二反光条，相邻两个所述第二反光条之间设有一个所述第一反光条；
    所述接线盒为多个，多个所述接线盒与多个所述第一反光条一一对应设置，每个所述第二反光条均具有所述开口。
  14. 根据权利要求13所述的光伏组件，其特征在于，每个所述第一反光条均具有所述开口，且所述第一反光条的所述开口的长度小于所述第二反光条的所述开口的长度。
  15. 根据权利要求1-14中任一项所述的光伏组件，其特征在于，所述开口的长度为L，其中所述L满足：0mm＜L≤500mm。
  16. 根据权利要求1-15中任一项所述的光伏组件，其特征在于，每个所述电池串中的相邻两个所述电池片之间的距离为d，其中所述d满足：0mm≤d≤2mm。
  17. 根据权利要求1-16中任一项所述的光伏组件，其特征在于，每个所述反光纵条的宽度为W 2，其中所述W 2满足：2mm≤W 2≤15mm。
  18. 根据权利要求1-17中任一项所述的光伏组件，其特征在于，所述反光层为涂覆在所述背面盖板的邻近所述电池单元层的一侧表面的反光涂层；或
    所述背面盖板与所述电池单元层之间设有封装胶膜，所述反光层设在所述封装胶膜上。
  19. 根据权利要求1-18中任一项所述的光伏组件，其特征在于，每个所述反光纵条的长 度为a，在所述串内电池片排布方向上、距离最远的两个所述电池片之间的最大距离为b，其中，所述a，b满足：0.7≤a/b≤1.3。
  20. 根据权利要求1-19中任一项所述的光伏组件，其特征在于，所述电池单元为两个，两个所述电池单元并联连接，每个所述电池单元包括串联连接的六个所述电池串，沿所述串排布方向、每相邻两个所述电池串为一个电池串组；
    所述接线盒为三个，每个所述接线盒分别位于对应的所述电池串组的两个所述电池串之间。
PCT/CN2021/083146 2020-04-07 2021-03-26 光伏组件 Ceased WO2021203984A1 (zh)

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