WO2015096490A1 - 双玻光伏电池组件 - Google Patents

双玻光伏电池组件 Download PDF

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Publication number
WO2015096490A1
WO2015096490A1 PCT/CN2014/084543 CN2014084543W WO2015096490A1 WO 2015096490 A1 WO2015096490 A1 WO 2015096490A1 CN 2014084543 W CN2014084543 W CN 2014084543W WO 2015096490 A1 WO2015096490 A1 WO 2015096490A1
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WO
WIPO (PCT)
Prior art keywords
layer
glass
double
photovoltaic cell
cell module
Prior art date
Application number
PCT/CN2014/084543
Other languages
English (en)
French (fr)
Inventor
王申存
孙翔
姜占锋
何龙
Original Assignee
深圳市比亚迪汽车研发有限公司
比亚迪股份有限公司
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
Application filed by 深圳市比亚迪汽车研发有限公司, 比亚迪股份有限公司 filed Critical 深圳市比亚迪汽车研发有限公司
Priority to US15/107,816 priority Critical patent/US10186625B2/en
Priority to JP2016543178A priority patent/JP2017501584A/ja
Priority to KR1020167017236A priority patent/KR20160090898A/ko
Priority to EP14875670.3A priority patent/EP3089355A4/en
Publication of WO2015096490A1 publication Critical patent/WO2015096490A1/zh

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/042PV modules or arrays of single PV cells
    • H01L31/048Encapsulation of modules
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/02Details
    • H01L31/02002Arrangements for conducting electric current to or from the device in operations
    • H01L31/02005Arrangements for conducting electric current to or from the device in operations for device characterised by at least one potential jump barrier or surface barrier
    • H01L31/02008Arrangements for conducting electric current to or from the device in operations for device characterised by at least one potential jump barrier or surface barrier for solar cells or solar cell modules
    • H01L31/0201Arrangements for conducting electric current to or from the device in operations for device characterised by at least one potential jump barrier or surface barrier for solar cells or solar cell modules comprising specially adapted module bus-bar structures
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/02Details
    • H01L31/0216Coatings
    • H01L31/02161Coatings for devices characterised by at least one potential jump barrier or surface barrier
    • H01L31/02167Coatings for devices characterised by at least one potential jump barrier or surface barrier for solar cells
    • H01L31/02168Coatings for devices characterised by at least one potential jump barrier or surface barrier for solar cells the coatings being antireflective or having enhancing optical properties for the solar cells
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/042PV modules or arrays of single PV cells
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/042PV modules or arrays of single PV cells
    • H01L31/048Encapsulation of modules
    • H01L31/0488Double glass encapsulation, e.g. photovoltaic cells arranged between front and rear glass sheets
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/054Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means
    • H01L31/0543Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means comprising light concentrating means of the refractive type, e.g. lenses
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02SGENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S30/00Structural details of PV modules other than those related to light conversion
    • H02S30/10Frame structures
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02SGENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S40/00Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
    • H02S40/30Electrical components
    • H02S40/34Electrical components comprising specially adapted electrical connection means to be structurally associated with the PV module, e.g. junction boxes
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy
    • Y02E10/52PV systems with concentrators

Definitions

  • the present invention relates to the field of solar cells, and more particularly to a dual glass photovoltaic cell assembly. Background technique
  • the existing double glass components use tempered glass as the back sheet, UV high permeability EVA or PVB on the front side, and white EVA or PVB on the back side EVA.
  • tempered glass As the back sheet, UV high permeability EVA or PVB on the front side, and white EVA or PVB on the back side EVA.
  • the back of the double glass assembly uses an airtight, impervious glass to prevent moisture from entering the assembly, but the gap between the edges of the two sheets of glass is still a weak link, and moisture can still enter the assembly through the encapsulation film, and Due to the sealing effect of the glass, it is difficult to diffuse out. Under the action of ultraviolet light, the small molecules of acetic acid produced by the decomposition of the EVA encapsulating film will still corrode the cell and reduce the life of the module. In the case of PVB packages, the problem is exacerbated by the high water absorption of PVB.
  • the problem with white EVA or PVB on the back is that the white part is likely to spread to the front side of the cell after long-term use, which blocks the cell sheet, causing hot spots and affecting component efficiency.
  • a solar photovoltaic module including a glass layer, a front film, a plurality of cells arranged in a spacer array, a back film, and a photovoltaic back plate, the photovoltaic back plate including a specular reflection covered by the cell sheet
  • the reflective layer structure is an isosceles trapezoid, when the upper bottom surface is exposed to the front surface of the sunlight, the light is directly reflected, and this portion of the light is not utilized, thereby affecting the photoelectric conversion efficiency.
  • the reflective layer has a trapezoidal structure
  • the corners of the trapezoidal layer tend to cause a certain degree of damage to the package film and the edge of the cell during the lamination process, thereby reducing the life of the entire solar cell module.
  • an object of the present invention is to provide a dual-glass photovoltaic cell assembly that improves the output power of the photovoltaic module, has good weather resistance, long life, high absorption rate to ultraviolet light, and good stability. High security.
  • a dual glass photovoltaic cell assembly includes: a body, the body comprising a first glass layer, a first encapsulation layer, a cell stack layer, a second encapsulation layer, and a second glass which are sequentially stacked a layer, an outer edge of the first glass layer and the second glass layer exceeds the first encapsulation layer, the cell stack layer, and the second encapsulation layer
  • 1 PIDM136468P An outer edge; a reflective coating disposed on a side surface of the second glass layer facing the battery panel layer; an end seal block, the end seal block being disposed on Between the first glass layer and the second glass layer, and the end seal block is located at an outer circumference of the first encapsulation layer, the cell stack layer, and the second encapsulation layer; and a frame, the frame is encapsulated by a sealant On the outer periphery of the body, the frame has a notch; a junction box, the junction box is disposed at the notch, the junction box is sealed with the body and the frame, and the battery panel layer is A bus bar is drawn between the first glass layer and the second glass layer, and the junction box is electrically connected to the bus bar.
  • the double-glass photovoltaic cell assembly of the present invention by providing the end seal block, the deficiency of the conventional photovoltaic module edge to expose the package material is compensated, and the first glass layer and the second glass layer which are densely packed with the upper and lower layers can be well combined.
  • the moisture and corrosive gases in the barrier environment enter the inside of the module, slow down the attenuation of the components and extend the life of the components.
  • the reflective coating the light passing through the gap of the cell can be reflected back to reduce the package loss.
  • the first glass layer and the second glass layer of the body can be prevented from being crushed to the greatest extent, thereby protecting the battery assembly, facilitating transportation and long life.
  • the bus bar can be effectively led out from the edge of the body through the bezel.
  • FIG. 1 is a cross-sectional view of a dual glass photovoltaic cell assembly in accordance with an embodiment of the present invention
  • FIG. 2 is a schematic illustration of the dual glass photovoltaic cell assembly shown in Figure 1;
  • Figure 3 is a schematic cross-sectional view of the frame of the double-glass photovoltaic cell assembly shown in Figure 1;
  • Figure 4 is a developed perspective view of the frame of Figure 2;
  • Figure 5 is a schematic diagram of light reflection of a backing layer in the double-glass photovoltaic cell assembly shown in Figure 1;
  • FIG. 6 is a schematic view of a junction box in a dual glass photovoltaic cell assembly in accordance with one embodiment of the present invention.
  • Figures 7a and 7b are top and bottom views of the junction box shown in Figure 1;
  • Figure 8 is a schematic illustration of a dual glass photovoltaic cell assembly in accordance with another embodiment of the present invention.
  • Figure 9 is a partial enlarged view of the double-glass photovoltaic cell assembly shown in Figure 8, showing the assembly of the diode and the junction box;
  • Figure 10 is a schematic view showing the positive and negative junction boxes respectively taken out in the double-glass photovoltaic cell assembly shown in Figure 9;
  • Figure 11 is a side view in the direction of A in Figure 10;
  • Figure 12 is a partial schematic view of the second glass layer of the dual glass photovoltaic cell assembly shown in Figure 9, showing
  • first glass layer 11 a first glass layer 11; a first encapsulation layer 12; a cell stack layer 13; a bus bar 131;
  • a second encapsulation layer 14 a second glass layer 15; a receiving groove 16;
  • a casing 41a a chamber 40a; sub-chambers 401a, 402a and 403a;
  • a casing 41b a chamber 410b; a threading hole 411b; a conductive sheet 42b;
  • PIDM136468P Connected and “connected” should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or passed through The intermediate medium is indirectly connected and can be internal to the two components.
  • the specific meanings of the above terms in the present invention can be understood in the specific circumstances by those skilled in the art.
  • the double glass photovoltaic cell assembly comprises: a body 1, a reflective coating 2, an end seal block 3, a side frame 6, and a junction box 4.
  • the body 1 includes a first glass layer 11 , a first encapsulation layer 12 , a cell stack layer 13 , a second encapsulation layer 14 , and a second glass layer 15 , which are sequentially stacked and disposed in sequence.
  • the outer edges of the glass layer 11 and the second glass layer 15 exceed the outer edges of the first encapsulation layer 12, the cell stack layer 13, and the second encapsulation layer 14.
  • the first glass layer 11 may be ordinary low-iron ultra-white embossed tempered glass or coated low-iron ultra-white embossed tempered glass
  • the second glass layer 15 may be ordinary low-iron ultra-white embossed tempered glass or ordinary tempered glass. glass.
  • the strength of the body 1 is increased, and the ability of the body 1 to withstand the load is improved. Due to its excellent weatherability, aging resistance, insulation and fire resistance, the glass has a much higher wear resistance than the polymer backsheet.
  • the use of glass as a back sheet can well enhance the aging resistance of the battery pack, and the pressure resistance and fire resistance of the double glass photovoltaic cell module according to the present invention are also improved.
  • the reflective coating 2 is provided on the side surface of the second glass layer 15 facing the cell stack layer 13 (the lower surface as shown in Figs. 1 and 5).
  • the reflective coating 2 is in the form of a flat web, and the first glass layer 11 is frosted glass.
  • the end seal block 3 is disposed between the first glass layer 1 1 and the second glass layer 15, and the end seal block 3 is located on the outer periphery of the first encapsulation layer 12 / cell stack layer 13 / second encapsulation layer 14. Specifically, the double-glass photovoltaic cell assembly is pressed by the first glass layer 110, the first encapsulation layer 12, the cell stack layer 13, the second encapsulation layer 14, the second glass layer 15, and the end seal block.
  • the symbol " / " used in the description of the present application means "and”.
  • the frame 6 is encapsulated on the outer periphery of the body 1 by a sealant. Alternatively, the frame is fixed to the outside of the outer edge of the body 1 by silicone, butyl rubber or double-sided tape.
  • the frame 6 has a notch 60, the junction box 4 is disposed at the notch 60, the junction box 4 is sealed with the body 1 and the frame 6, and the cell stack 13 leads the bus bar 131 from between the first glass layer 11 and the second glass layer 15.
  • the junction box 4 is electrically connected to the bus bar 131 to extract the energy of the battery chip.
  • the double-glass photovoltaic cell assembly of the present invention by providing the end seal block, the deficiency of the conventional photovoltaic module edge to expose the package material is compensated, and the first glass layer and the second glass layer which are densely packed with the upper and lower layers can be well combined.
  • the moisture and corrosive gases in the barrier environment enter the inside of the module, slow down the attenuation of the components and extend the life of the components.
  • the reflective coating the light passing through the gap of the cell can be reflected back to reduce the package loss.
  • the first glass layer 11 and the second glass layer 15 of the body 1 can be prevented from being crushed to the utmost extent, thereby protecting the battery assembly, facilitating transportation and long life.
  • bus bar 131 can be effectively taken out from the edge of the body through the bezel 6.
  • the cross section of the reflective coating 2 is formed into a substantially triangular shape having a vertex angle, and the reflective coating 2 corresponds to an adjacent battery in the battery panel layer 13. Inter-gap, and/or cell edge position settings. Therefore, referring to FIG. 5, the light entering the gap between the first glass layer 11 and the cell sheet is reflected by the triangular reflective coating 2 with a circular chamfer, and the reflected light is incident on the first glass layer 11 to continue to be reflected.
  • the use of the battery chip further improves the utilization of photons and improves the output power of the battery components.
  • the triangular reflective coating 2 with rounded chamfer does not damage the edge of the cell and the encapsulation film, and can fit well in the battery assembly, increasing the safety and mechanical of the battery assembly. Stability and extended service life.
  • the reflective layer corresponding to the gap between adjacent cells in the cell stack layer 13 and/or the edge position of the cell sheet constitutes an integrated network board structure
  • the apex angle of the triangle formed by the cross section of the reflective coating 2 is ⁇ /6-5 ⁇ /6. Further, the apex angle of the triangle is ⁇ /4- ⁇ /2. More preferably, the apex angle of the triangle is ⁇ /3.
  • the cross section of the reflective coating 2 forms a triangle having a base angle ⁇ of 15-85 degrees. Further, the triangle has a base angle ⁇ angle of 30-70 degrees. More preferably, the triangle has a base angle ⁇ angle of 60 degrees. It will be understood by those skilled in the art that the apex angle and the bottom angle of the above triangle can be used arbitrarily.
  • the reflective coating 2 is a white organic polymer layer, including but not limited to a fluorocarbon resin layer, a diallyl polyisophthalate layer, a polyvinylidene fluoride layer, a polyethylene layer, and a polytetrafluoroethylene layer.
  • At least one of the polymer layer and the white silica gel layer has high reflectivity and excellent aging resistance.
  • the reflective coating 2 is adhered to one side of the transparent layer by processes including, but not limited to, spraying, coating, printing, and the like.
  • the junction box 4 is engaged with the outer edge of the body 1 and is glued to the frame 6.
  • the junction box 3 is mounted on the edge of the battery assembly instead of being perforated or slotted in the back of the assembly, maintaining the complete structure of the second glass layer 15, which does not form a stress concentration point and is more secure.
  • this distribution of the junction box 3 can reduce the length of the internal bus bar and the external cable of the component with respect to the conventional components, saves cost, and reduces the resistance to increase the power output.
  • two sides of the junction box 4 facing the body 1 are provided with two engaging legs (not shown), and the two engaging legs are respectively engaged at the outer edges of the body 1.
  • the junction box 4 is glued to the first glass layer 11 and the second glass layer 15 of the body 1.
  • the body 1 is formed in a rectangular shape, and the junction box 4 is three and spaced apart from each other on one of the short sides of the body 1, and each adjacent two junction boxes 4 Between the package connectors 8 being connected, the package connector 8 encapsulating the outer edge of the body 1 corresponding to the notch 60, thereby encapsulating the connector 8 and
  • the bezel 6 collectively protects the edges of the body 1.
  • the outer edges of conventional battery components are usually not protected or only protected by tape.
  • the components of this structure are easily broken due to the corners of the tempered glass, which is less safe, and is dangerous during transportation and installation. Larger.
  • the edge of the battery assembly and the impact resistance of the four corners are greatly improved, and the sealing of the battery assembly is further enhanced. effect.
  • the bezel 6 and the package connector 8 can be made of a plurality of materials, respectively.
  • the frame 6 is an aluminum member
  • the package connector 8 is an insulating member.
  • the frame 6 needs to have a grounding hole 64.
  • the bezel 6 and the package connector 8 are both aluminum members, and a grounding hole 64 may be provided in each of the package connectors 8 between adjacent two junction boxes 4.
  • the present invention is not limited thereto, and both the side frame 6 and the package connector 8 may be insulating members. At this time, the bezel 6 and the package connecting member 8 will not need to be provided with the grounding holes 64.
  • the junction box 4 includes: a casing 41a, at least two partitions 42a, a conductive block 43a, a diode 44a, and a connector 45a.
  • the casing 41a has a chamber 410.
  • the side wall of the chamber 410 has a plurality of threading holes 41.
  • the bus bar 131 led out by the battery sheet in the photovoltaic module is adapted to enter the cavity through the threading hole 41 1 .
  • Within chamber 410 as shown in Figures 6 and 7b.
  • At least two partitions 42a are disposed within the chamber 410 to divide the chamber 410 into at least three sub-chambers, for example, the partition 42a may be a plastic piece.
  • a threading hole 41 1 is provided on the side walls of the two sub-chambers of the outermost ends of at least three sub-chambers.
  • the threading hole 41 1 is a rectangular hole as shown in Fig. 7b.
  • a conductive block 43a is disposed in the chamber 410 and extends through at least three sub-chambers to lengthen the length of the conductive block 43a.
  • the bus bar 131 is adapted to be soldered to the conductive block 43a to extract energy from the battery.
  • Diode 44a is disposed in the intermediate subchamber of at least three of the subchambers to prevent the cell from burning out when a hot spot effect is encountered and to prevent current backflow when there is no illumination.
  • the diode 44a is electrically connected to the conductive block 43a, and preferably, the diode 44a is soldered to the conductive block 43a.
  • the connector 45a is located outside the casing 41a and is connected to the conductive block 43a via a cable 46a.
  • the chamber 410 is divided into a plurality of sub-chambers by the partition plate 42a, and the diode 44a is disposed in the intermediate sub-chamber, and the welded portion at the diode 44a is welded when the bus bar 131 is welded. Will not melt, avoiding diode desoldering.
  • the diode 44a fails or the junction box 4 fails, it is only necessary to solder the bus bar 131, or the bus bar 131 can be taken out from the threading hole 41 1 to remove the junction box, which is convenient and time-saving, facilitates maintenance of the power station, and extends the component. life.
  • the double glass photovoltaic cell assembly according to the present embodiment may further include a chip type sheet diode 9 soldered on the bus bar 131 and laminated on the first glass layer 1 1 and the second glass layer 15 Between the two, the battery is prevented from burning off when the hot spot effect is encountered, and the current is prevented from flowing back when there is no light.
  • the number of partitions 42a is two and the two partitions 42a will chamber
  • 6 PIDM136468P 410 is divided into three sub-chambers, namely a first sub-chamber 401a, a second sub-chamber 402a, and a third sub-chamber 403a, wherein the diode 44a is disposed in the most intermediate sub-chamber 402a, as shown in FIG.
  • the subchamber in which the diode 44a is located that is, the second subchamber 402a, is sealed by a potting glue.
  • a potting glue may also be poured.
  • the casing 41a includes a casing and a cover (not shown) that are fastened to each other, and the casing and the casing are sealed by a butyl rubber to ensure waterproofness of the junction box.
  • junction box according to the embodiment of the present invention will be specifically described below with reference to Fig. 6, and the welding of the bus bar 131 and the conductive block 43a will be described as an example.
  • the bus bar 131 led out from the battery piece in the photovoltaic module extends through the threading hole 41 1 into the first sub-chamber 401a and the third sub-chamber 403a, as shown in FIG.
  • the solder remaining in the sub-chamber 401a and the third sub-chamber 403a is heated to solder the bus bar 131 to the conductive block 43a.
  • the potting compound is injected into the second sub-chamber 402a where the diode 44a is located, thereby completing the installation of the junction box.
  • junction box according to the embodiment of the present invention solves the problem that the existing junction box is difficult to replace, and the welding bus bar easily causes the diode to be desoldered, prolonging the service life, and achieving a 40-year long warranty.
  • a double-glass photovoltaic cell assembly includes a chip-type thin-film diode 9 soldered on a bus bar 131 and laminated on a first glass layer 11 and a second glass. Between the layers 15, the battery sheet is prevented from burning off when the hot spot effect is encountered, and the current is prevented from flowing back when there is no light.
  • the junction box 4 is two and formed in an L shape, and the junction box 4 is disposed at two adjacent corners of the body 1, and the bus bar 131 extends into the junction box 4 to take out the energy of the battery sheet.
  • the chip diode 9 is directly soldered to the bus bar 131, and the bus bar 131 is taken out from both ends and soldered to the positive and negative wires at the two corners of the body 1 respectively.
  • the sheet diode 9 has a side length of 8-12 mm.
  • the material of the junction box 4 may be ceramic, thereby improving the tolerance to the environment.
  • the material of the junction box 4 can also be plastic.
  • the thickness H of the diode 9 is less than 0.8 mm, otherwise the first glass layer 11 and the second glass layer 15 above and below it will be held against.
  • the receiving groove 16 is formed on the second glass layer 15.
  • the side of the length of the side of the diode 9 is 0. 2mm.
  • the diode 9 is substantially in close contact with the first glass layer 11 and the second glass layer 15 located above and below it, so that the heat generated by the diode 9 can be quickly conducted.
  • the junction box 4 includes: a casing 41b, a conductive piece 42b, and a connector 43b.
  • the casing 41b has a chamber 410b therein, and the side wall of the chamber 410b has a threading hole 411b (as shown in FIG. 5).
  • the threading hole 11 is a rectangular hole.
  • the conductive strip 42b is disposed in the chamber 410b, wherein the bus bar 131 extends through the threading hole 411b into the chamber 410b and is connected to the conductive sheet 42b.
  • the plug 43b is located outside the box 41b and is connected to the conductive block through the cable 44b. .
  • the bus bar 131 and the conductive strip 42b may be soldered or snap-fit connections.
  • the double-glass photovoltaic cell assembly according to the embodiment of the invention solves the problem that the existing junction box is difficult to replace, and the solder bus bar easily causes the diode to be desoldered, and the service life is prolonged.
  • the junction box is simple to install, requires fewer cables and bus bars, reduces resistance and increases power output.
  • the adhesive seal member having a water vapor transmission rate of less than 0.01 g/m 2 /day may be a butyl rubber member or a polyisobutylene rubber member, or a water vapor transmission rate of less than 0.01 g / m 2 / day in accordance with the embodiment of the present invention. Therefore, the deficiency of the traditional photovoltaic module edge to expose the packaging material is compensated for, and the first glass layer 11 and the second glass layer 15 which are densely packed with the upper and lower layers can well block the water vapor and corrosive gas entering the component in the environment. Internally, slows component degradation and extends component life. Thereby, the double glass battery module according to the present invention has good weather resistance, high structural strength, long life, and high ultraviolet absorption rate.
  • the dual glass photovoltaic cell assembly according to the present invention may further comprise a plurality of fixing devices 5 disposed on a side surface of the second glass layer 15 remote from the cell stack layer 13, It is used to mount the entire battery assembly to somewhere by the fixing device 5.
  • the back side of the battery assembly is bonded to the four fixing devices 5 by using a high-strength adhesive, whereby the fixing device 5 can be fixed to the bracket for fixing the battery assembly by screws (not shown). Out).
  • This type of installation ensures a more uniform force on the battery components, enhances the ability of the components to withstand loads, and is safer and more reliable.
  • the fixture 5 is provided with a positioning member for fixing the double glass battery assembly to the external carrier.
  • the fixing means 5 are four and evenly distributed on the surface of the second glass layer 15, i.e., the back of the entire battery assembly. Thereby, it is convenient to mount the entire battery assembly to a certain mounting surface or mounting bracket (not shown).
  • a bezel in a double-glass photovoltaic cell assembly according to an embodiment of the present invention will be described in detail below with reference to Figs. 1 to 4, in which three junction boxes are provided on the short side of the main body as an example.
  • the frame 6 can be fixed to the outside of the outer edge of the body 1 by silicone, butyl rubber or double-sided tape.
  • the frame 6 is formed as a frame structure, and the cross section of the frame 6 has a U-shaped groove, and the width of the groove of the U-shaped groove is larger than the thickness of the body 1 to cover the outer edge of the body 1.
  • the thickness of the frame 6 is l_2 mm, that is, the thickness of each side of the U-shaped groove of the frame 6 is l_2 mm.
  • the outer surface of the bezel 6 is formed with ridges 62 as shown in FIG.
  • the ribs 62 extend along the length of the bezel 6.
  • the ridges 62 extend straight or curved along the length of the frame 6, for example, may also extend in a spiral. By providing the ridges, the overall strength of the bezel 6 can be increased, and the appearance of the bezel 6 can be made more beautiful.
  • the frame 6 is an integral frame 6 formed by bending a package strip.
  • the package strip is a continuous conductor in which the package strip has at least two predetermined bending positions, a 90-degree V-shaped groove 63 is formed at each predetermined bending position, and a grounding hole 64 is formed in the package strip.
  • a continuous bezel conductor is used because if each side of the bezel conductor is not continuous, the battery assembly needs to be grounded at each side of the installation, which increases cost and is difficult to install.
  • the grounding hole 64 has a diameter of 2-4 mm.
  • the assembly can be directly bent and formed, so that the bent 90-degree V-shaped grooves 63 just form the corners of the frame.
  • the frame 6 and the connecting member 4 are both insulating polymer materials, it is not necessary to open the grounding hole 64 and the plurality of V-shaped grooves 63 on the frame 6, but directly cut out the required size segments for installation, that is, the frame 6 is connected to the connecting member 4 in sequence.
  • the first encapsulation layer 12 and the second encapsulation layer 14 are transparent silica gel layers or polyolefin layers. Therefore, compared with the conventional EVA packaging film, the advantage is that the ultraviolet light absorbed by the EVA ultraviolet absorber can be converted into electric energy to increase the output of the photovoltaic module; in addition, the transparent silica layer or the polyolefin layer is irradiated by ultraviolet light. It is very stable, does not degrade to produce small molecules such as acetic acid, corrodes the battery, and has better weather resistance.
  • the transparent silica gel is a film-like structure which is thermoplastic, solid at room temperature, and gradually softens after an increase in temperature.
  • Transparent liquid silica gel is a two-component silica gel. It is liquid at room temperature. The two components are uniformly mixed in a ratio of 1:1. After lamination at 5 °C (T 130 °C, it can be cured into a thermosetting transparent silica gel with low lamination temperature. It saves energy and helps to extend the life of the laminator.
  • the back and front plates of the double-glass assembly are rigid glass, which is easier to apply and laminate than the conventional backsheet of polymer materials.
  • the second encapsulating layer 14 is a polyolefin layer, the thermosetting polyolefin or the thermoplastic polyolefin.
  • the temperature of the component may reach 8 in actual use (TlO (TC, the thermoplastic film will soften, have certain fluidity, and the thermosetting film does not There will be this problem, and the components have higher temperature resistance.
  • the double-glass photovoltaic cell assembly according to the present invention has good weather resistance, high structural strength, long life, and high ultraviolet absorption rate.

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Abstract

一种双玻光伏电池组件,包括:本体(1),所述本体(1)包括依次层叠设置的第一玻璃层(11)、第一封装层(12)、电池片组层(13)、第二封装层(14)、和第二玻璃层(15),第一玻璃层(11)和第二玻璃层(15)的外边缘超过电池片组层(13)的外边缘;设在第二玻璃层(15)上的反光涂层;端部密封块,所述端部密封块设在第一玻璃层(11)和第二玻璃层(15)之间位于第一封装层(12)、电池片组层(13)、第二封装层(14)的外周;封装在本体(1)外周边的边框(6),边框(6)具有缺口(60);设在缺口(60)处的接线盒(4)。

Description

双玻光伏电池组件
技术领域
本发明涉及太阳能电池领域, 尤其是涉及一种双玻光伏电池组件。 背景技术
现有的双玻组件使用钢化玻璃作为背板, 正面使用紫外高透 EVA或 PVB, 背面一层 EVA使用的是白色 EVA或 PVB。 这种组件以下几个方面的缺陷:
第一, 双玻组件背面使用不透气, 不透水的玻璃, 可以防止水汽进入组件, 但是两 片玻璃的边缘之间的缝隙仍然是一个薄弱环节, 水汽仍然可以透过封装膜进入组件内 部, 并且由于玻璃的密闭作用, 很难扩散出去。 在紫外线作用下, EVA封装膜分解产生 的醋酸小分子仍然会腐蚀电池片, 降低组件寿命。 如果是 PVB封装, 由于 PVB吸水性 很高, 问题会更严重。
第二,背面使用白色 EVA或 PVB存在的问题是白色部分长期使用后很有可能扩散到 电池片的正面, 对电池片形成遮挡, 造成热斑, 影响组件效率。
第三, 组件边缘无框存在安全隐患, 因为钢化玻璃最脆弱的地方在于边缘和四角, 如果保护不当, 很容易造成组件碎裂。
另外, 目前已公开一种太阳能光伏组件, 包括玻璃层、 前层胶膜、 间隔阵列布置的 若干电池片、 后层胶膜和光伏背板, 所述光伏背板包括被电池片覆盖的镜面反射部和 位于电池片间隙的漫反射部, 其中, 公开了漫反射部的截面为等腰梯形或者漫反射部 为球面漫反射部。 但是, 由于反射层结构为等腰梯形, 上底面在接受太阳光的正面照 射时, 光线会直接反射出去, 这部分光就得不到利用, 从而影响光电转化效率。 另一 方面, 由于反射层为梯形结构, 在层压工艺过程中, 梯形的棱角势必会对封装胶膜及 电池片边缘造成一定程度的破坏, 从而降低整个太阳能电池组件的寿命。 发明内容
本发明旨在至少解决现有技术中存在的技术问题之一。为此, 本发明的一个目的在 于提出一种双玻光伏电池组件, 所述双玻光伏电池组件提高了光伏组件的输出功率, 耐候性好、 寿命长且对紫外线吸收率高, 稳定性好, 安全性高。
根据本发明实施例的一种双玻光伏电池组件, 包括: 本体, 所述本体包括依次层叠 设置的第一玻璃层、 第一封装层、 电池片组层、 第二封装层、 和第二玻璃层, 所述第 一玻璃层和所述第二玻璃层的外边缘超过所述第一封装层、 电池片组层和第二封装层
1 PIDM136468P 的外边缘; 反光涂层, 所述反光涂层设在所述第二玻璃层的朝向所述电池片组层的一 侧表面上; 端部密封块, 所述端部密封块设在所述第一玻璃层和所述第二玻璃层之间, 且所述端部密封块位于第一封装层、 电池片组层、 第二封装层的外周; 以及边框, 所 述边框通过密封胶封装在所述本体的外周边上, 所述边框具有缺口; 接线盒, 所述接 线盒设置在所述缺口处, 所述接线盒与所述本体和所述边框封接, 所述电池片组层从 所述第一玻璃层和所述第二玻璃层之间引出汇流条, 所述接线盒与汇流条电连接。
根据本发明的双玻光伏电池组件, 通过设置端部密封块, 弥补了传统的光伏组件边 缘将封装材料暴露在外的不足, 结合上下层密实的第一玻璃层和第二玻璃层, 能够很 好的阻隔环境中的水汽、 腐蚀性气体进入组件内部, 减慢组件衰减, 延长组件寿命; 通过设置反光涂层, 能够将透过电池片间隙的光线反射回去以减少封装损失; 通过设 置边框, 当有外力冲击电池组件的边缘或四个拐角时, 可以最大程度地避免本体的第 一玻璃层和第二玻璃层被撞碎, 由此保护了电池组件, 便于运输且寿命长。 另外, 可 以有效地将汇流条从本体的边缘通过边框引出。
本发明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, 或通过本发明的实践了解到。 附图说明
本发明的上述和 /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是根据本发明实施例的双玻光伏电池组件的剖视图;
图 2是图 1中所示的双玻光伏电池组件的示意图;
图 3是图 1中所示的双玻光伏电池组件的边框截面示意图;
图 4是图 2中边框的展开示意图;
图 5是图 1中所示的双玻光伏电池组件中背板层的光反射原理图;
图 6是根据本发明一个实施例的双玻光伏电池组件中接线盒的示意图;
图 7a和图 7b是图 1中所示的接线盒的俯视图和仰视图;
图 8是根据本发明另一个实施例的双玻光伏电池组件的示意图;
图 9是图 8中所示的双玻光伏电池组件中的局部放大图,其中示出了二极管和接线 盒的装配;
图 10是图 9中所示的双玻光伏电池组件中分别引出正极和负极接线盒的示意图; 图 11是图 10中 A向侧视图;
图 12是图 9中所示的双玻光伏电池组件中第二玻璃层的局部示意图, 其中示出了
2 PIDM136468P 容纳槽。 附图标记:
本体 1;
第一玻璃层 11; 第一封装层 12; 电池片组层 13; 汇流条 131;
第二封装层 14; 第二玻璃层 15; 容纳槽 16;
反光涂层 2; 端部密封块 3;
接线盒 4;
第一实施例:
盒体 41a; 腔室 40a; 子腔室 401a、 402a和 403a;
穿线孔 411a; 隔板 42a; 导电块 43a; 二极管 44a;
接插件 45a; 线缆 46a;
第二实施例:
盒体 41b; 腔室 410b; 穿线孔 411b; 导电片 42b;
插接件 43b; 线缆 44b;
固定装置 5;
边框 6; 缺口 60; U形槽 61; 凸条 62; V形槽 63; 接地孔 64;
密封胶 7; 封装连接件 8; 薄片二极管 9 具体实施方式
下面详细描述本发明的实施例, 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, 仅用于解释本发明, 而不能理解为对本发明的限制。
在本发明的描述中, 需要理解的是, 术语"上"、 "下"、 "前"、 "后"、 "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发明和简化描述, 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发明的限制。 此外, 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。 在本发明的描述中, 除非另有说明, "多个" 的含义是两个或两个以上。
在本发明的描述中, 需要说明的是, 除非另有明确的规定和限定, 术语 "安装" 、
PIDM136468P "相连" 、 "连接" 应做广义理解, 例如, 可以是固定连接, 也可以是可拆卸连接, 或一体地连接; 可以是机械连接, 也可以是电连接; 可以是直接相连, 也可以通过中 间媒介间接相连, 可以是两个元件内部的连通。 对于本领域的普通技术人员而言, 可 以具体情况理解上述术语在本发明中的具体含义。
下面参考图 1-图 12描述根据本发明实施例的一种双玻光伏电池组件。
根据本发明的双玻光伏电池组件, 包括: 本体 1、 反光涂层 2、 端部密封块 3、 边 框 6和接线盒 4。
如图 1所示, 本体 1包括依次层叠设置的依次层叠设置的第一玻璃层 11、 第一封 装层 12、 电池片组层 13、 第二封装层 14、 以及第二玻璃层 15, 第一玻璃层 11和第二 玻璃层 15的外边缘超过第一封装层 12、 电池片组层 13和第二封装层 14的外边缘。可 选地,第一玻璃层 11可以是普通低铁超白压花钢化玻璃或镀膜低铁超白压花钢化玻璃, 第二玻璃层 15可以是普通低铁超白压花钢化玻璃或普通钢化玻璃。通过采用第一玻璃 层 11和第二玻璃层 15, 提高了本体 1的强度, 提高了本体 1的承受载荷的能力。 由于 玻璃有超强的耐候性、 耐老化性能、 绝缘性能和防火性能, 耐磨性能也比高分子背板 高出许多。 使用玻璃作为背板能够很好地增强电池组件的耐老化性能, 而且根据本发 明的双玻光伏电池组件的耐压性能和防火性能也因此得到提高。
反光涂层 2设在第二玻璃层 15的朝向电池片组层 13的一侧表面上(如图 1和图 5 中所示的下表面) 。 可选地, 反光涂层 2为平板网络状, 第一玻璃层 11为毛玻璃。
端部密封块 3设在第一玻璃层 1 1和第二玻璃层 15之间,且端部密封块 3位于第一 封装层 12/电池片组层 13/第二封装层 14的外周。 具体而言, 双玻光伏电池组件为第 一玻璃层 1 1、 第一封装层 12、 电池片组层 13、 第二封装层 14、 第二玻璃层 15及端部 密封块 3层压制得。 其中, 本申请的描述中采用的符号 " / "表示 "和" 。
边框 6通过密封胶封装在本体 1的外周边上, 可选地, 边框通过硅胶、 丁基橡胶或 双面胶带固定在本体 1的外边缘的外部。 边框 6具有缺口 60, 接线盒 4设置在缺口 60 处, 接线盒 4与本体 1和边框 6封接, 电池片组层 13从第一玻璃层 11和第二玻璃层 15之间引出汇流条 131, 接线盒 4与汇流条 131电连接以将电池片的能量引出。
根据本发明的双玻光伏电池组件, 通过设置端部密封块, 弥补了传统的光伏组件边 缘将封装材料暴露在外的不足, 结合上下层密实的第一玻璃层和第二玻璃层, 能够很 好的阻隔环境中的水汽、 腐蚀性气体进入组件内部, 减慢组件衰减, 延长组件寿命; 通过设置反光涂层, 能够将透过电池片间隙的光线反射回去以减少封装损失; 通过设 置边框, 当有外力冲击电池组件的边缘或四个拐角时, 可以最大程度地避免本体 1 的 第一玻璃层 11和第二玻璃层 15被撞碎, 由此保护了电池组件, 便于运输且寿命长。
4 PIDM136468P 另外, 可以有效地将汇流条 131从本体的边缘通过边框 6引出。
根据本发明的一些实施例, 如图 5所示, 反光涂层 2的截面形成为顶角为圆弧的大 体三角形形状, 反光涂层 2对应于电池片组层 13 中的相邻电池片之间的间隙、 和 /或 电池片边缘位置设置。 由此, 参考图 5, 从第一玻璃层 11入到电池片间隙的光线, 在 带圆弧倒角的三角形反光涂层 2进行反射, 反射后的光线入射到第一玻璃层 11继续反 射到电池片上利用, 这样就进一步提高了光子的利用率, 提高了电池组件的输出功率。 此外, 在层压工艺中, 带圆弧倒角的三角形反光涂层 2 不会对电池片边缘及封装胶膜 造成破坏, 能够很好的契合在电池组件中, 增加电池组件的安全性及机械稳定性, 延 长了使用寿命。
优选地, 对应于电池片组层 13中的相邻电池片之间的间隙、和 /或电池片边缘位置 设置的反光层组成一体网络板结构,
可选地, 反光涂层 2的截面形成的三角形的顶角弧度为 Π /6-5Π /6。 进一步地, 该 三角形的顶角弧度为 Π /4-Π /2。 更优选地, 该三角形的顶角弧度为 Π /3。 可选地, 反 光涂层 2的截面形成的三角形的底角 α角度为 15-85度。 进一步地, 该三角形的底角 α角度为 30-70度。 更优选地, 该三角形的底角 α角度为 60度。 本领域内普通技术人 员可以理解, 上述三角形的顶角弧度和底角角度可以任意配合使用。
在一些实施例中, 反光涂层 2为白色有机高分子层, 包括但不限于氟碳树脂层、 聚 间苯二甲酸二烯丙酯层、 聚偏氟乙烯层、 聚乙烯层、 聚四氟乙烯层、 氟碳树脂改性聚 合物层、 聚间苯二甲酸二烯丙酯改性聚合物层、 聚偏氟乙烯改性聚合物层、 聚乙烯改 性聚合物层、 聚四氟乙烯改性聚合物层和白色硅胶层中的至少一种, 具有高反射性, 耐老化性优异等特点。 反光涂层 2 通过包括但不限制于喷涂、 涂覆、 印刷等加工工艺 紧密附着在透明层一面。
如图 2和图 8所示, 接线盒 4卡合在本体 1的外边缘, 且与边框 6通过胶封接。 由 此, 接线盒 3 安装在电池组件的边缘, 而不是在组件背面开孔或开槽, 保持了第二玻 璃层 15的完整结构, 不会形成应力集中点, 安全性更高。 另外, 接线盒 3的这种分布 相对于传统组件可以减少组件内部汇流条和外部线缆的长度, 节省了成本, 并且减少 了电阻增加功率输出。 可选地, 接线盒 4的朝向本体 1 的一侧设有两个卡合脚 (图未 示出) , 两个卡合脚分别卡合在本体 1 的外边缘处。 进一步地, 在一个可选示例中, 接线盒 4胶粘在本体 1的第一玻璃层 11和第二玻璃层 15上。
根据本发明的一个实施例, 如图 2所示, 本体 1形成为矩形, 接线盒 4为三个且彼 此间隔开地设在本体 1的其中一个短边上,每相邻两个接线盒 4之间通过封装连接件 8 相连, 封装连接件 8封装对应于缺口 60处的本体 1的外边缘, 由此, 封装连接件 8和
PIDM136468P 边框 6共同对本体 1 的边缘进行保护。 相较而言, 传统的电池组件的外缘通常不做保 护或仅仅使用胶带保护, 这种结构的组件由于钢化玻璃的边角容易受力而碎裂, 安全 性较低, 运输和安装时风险较大。 而根据本发明实施例的双玻光伏电池组件使用 U 型 的刚性边框和封装连接件 8保护后, 电池组件的边缘和四角的抗撞击能力有了大大的 提高, 并且进一步加强了电池组件的密封效果。
在本实施例中, 边框 6和封装连接件 8可以分别为多种材料制成。 其中, 在一个可 选示例中, 边框 6为铝材件, 封装连接件 8为绝缘件, 此时边框 6上需要具有一个接 地孔 64。 在另一个可选示例中, 边框 6和封装连接件 8均为铝材件, 每相邻两个接线 盒 4之间的封装连接件 8上可以均设有一个接地孔 64。 当然, 本发明并不限于此, 边 框 6和封装连接件 8可以都为绝缘件, 此时, 边框 6和封装连接件 8都将不需要设置 接地孔 64。
下面具体描述本实施例的接线盒 4的结构。 接线盒 4包括: 盒体 41 a、 至少两个隔 板 42a、导电块 43a、二极管 44a和接插件 45a。如图 6所示,盒体 41a内具有腔室 410, 腔室 410的侧壁上具有多个穿线孔 41 1,光伏组件中电池片引出的汇流条 131适于穿过 穿线孔 41 1进入腔室 410内, 如图 6和图 7b所示。 至少两个隔板 42a设在腔室 410内 以将腔室 410分成至少三个子腔室, 例如隔板 42a可以为塑料件。 穿线孔 41 1设在至 少三个子腔室中最外端的两个子腔室的侧壁上。 可选地, 穿线孔 41 1 为矩形孔, 如图 7b所示。
导电块 43a设在腔室 410内且贯穿至少三个子腔室, 加长了导电块 43a的长度。汇 流条 131适于与导电块 43a焊接连接从而将电池片的能量引出。 二极管 44a设在至少 三个子腔室中的中间子腔室内, 使得在遇到热斑效应时防止电池片烧掉, 且在没有光 照时防止电流倒流。 二极管 44a与导电块 43a电连接, 优选地, 二极管 44a焊接至导 电块 43a上。 接插件 45a位于盒体 41a外且通过线缆 46a与导电块 43a连接。
由此, 根据本发明实施例的接线盒 4, 通过隔板 42a将腔室 410分成多个子腔室, 且二极管 44a设在中间子腔室内, 在焊接汇流条 131时, 二极管 44a处的焊接处不会 融化, 避免了二极管脱焊。 另外, 当二极管 44a失效或接线盒 4失效时, 只需焊下汇 流条 131, 或将汇流条 131从穿线孔 41 1取出就可以取下接线盒, 操作简便省时, 便于 电站维护, 延长组件寿命。 进一步可选地, 根据本实施例的双玻光伏电池组件还可以 包括贴片式薄片二极管 9, 薄片二极管 9焊接在汇流条 131上且层压在第一玻璃层 1 1 和第二玻璃层 15之间, 使得在遇到热斑效应时防止电池片烧掉, 且在没有光照时防止 电流倒流。
根据本发明的一个优选生示例, 隔板 42a 的数量为两个, 且两个隔板 42a将腔室
6 PIDM136468P 410分成三个子腔室、 即第一子腔室 401a、 第二子腔室 402a和第三子腔室 403a, 其中 二极管 44a设在最中间的子腔室 402a内, 如图 6所示。 二极管 44a所在的子腔室即第 二子腔室 402a内通过灌封胶密封。 由此, 可以保持二极管 44a周围有导热性良好的灌 封胶, 能够及时降低二极管的温度, 保护二极管。 可选地, 第一子腔室 401a和第三子 腔室 403a内可以保持空腔, 也可以灌入灌封胶。
可选地, 盒体 41a包括相互扣合的盒座和盒盖 (图未示出) , 盒盖和盒座之间通过 丁基橡胶密封, 从而保证接线盒的防水性。
下面参考图 6具体描述根据本发明实施例的接线盒的安装过程,以汇流条 131和导 电块 43a焊接为例进行说明。
如图 6所示,从光伏组件中电池片引出的汇流条 131穿过穿线孔 41 1伸入到第一子 腔室 401a和第三子腔室 403a内, 如图 6所示, 在第一子腔室 401a和第三子腔室 403a 内预留的焊锡加热时将汇流条 131焊接到导电块 43a上。 最后将灌封胶注入到二极管 44a所在的第二子腔室 402a内, 从而完成了接线盒的安装。
根据本发明实施例的接线盒, 解决了现有的接线盒难以更换、 以及焊接汇流条容易 造成二极管脱焊的问题, 延长使用寿命, 可以实现 40年超长质保。
如图 6所示, 根据本发明的另一个实施例, 双玻光伏电池组件包括贴片式薄片二极 管 9,薄片二极管 9焊接在汇流条 131上且层压在第一玻璃层 11和第二玻璃层 15之间, 使得在遇到热斑效应时防止电池片烧掉, 且在没有光照时防止电流倒流。 此时, 接线 盒 4为两个且分别形成为 L形, 接线盒 4设在本体 1的其中两个相邻拐角处, 汇流条 131伸入接线盒 4内从而将电池片的能量引出。具体而言, 在铺设电池片组层中的电池 片矩阵时, 直接将薄片二极管 9焊接至汇流条 131上, 汇流条 131从两端引出, 分别 焊接至本体 1两个拐角处的正负接线盒上, 如图 8-图 10所示。 可选地, 薄片二极管 9 的边长为 8-12mm。
可选地, 接线盒 4的材料可以为陶瓷, 由此可以提高对环境的耐受能力。 当然, 接 线盒 4的材料也可以为塑料。
在其中一个可选示例中, 二极管 9的厚度 H小于 0. 8mm, 否则将会顶住位于其上方 和下方的第一玻璃层 11和第二玻璃层 15。 而在本发明的另一个可选示例中, 二极管 9 的厚度 H为 0. 8-2mm,此时在第一玻璃层 11和第二玻璃层 15的相对的侧面中至少一个 上形成有容纳槽 16, 容纳槽 16 的总深度 h=H-0. 8mm。 也就是说, 如果第一玻璃层 1 1 和第二玻璃层 15中的其中一个上设有容纳槽 16时, 该容纳槽的深度为 h=H-0. 8mm; 如 果第一玻璃层 1 1和第二玻璃层 15上都具有相对应的容纳槽 16时, 两个容纳槽的总深 度为 h=H-0. 8mm。 可选地, 如图 6所示, 容纳槽 16形成在第二玻璃层 15上。
7 PIDM136468P 优选地, 容纳槽 16为正方形槽, 且容纳槽 16的边长比二极管 9的边长大 0. 2mm。 这样, 二极管 9基本上和位于其上方和下方的第一玻璃层 1 1和第二玻璃层 15近距离 接触, 从而可以很快地将二极管 9产生的热量传导出去。
具体地, 接线盒 4包括: 盒体 41b、 导电片 42b和插接件 43b, 盒体 41b内具有腔 室 410b, 腔室 410b的侧壁上具有穿线孔 411b (如图 5所示) , 可选地, 穿线孔 11为 矩形孔。导电片 42b设在腔室 410b内,其中汇流条 131穿过穿线孔 411b伸入腔室 410b 内且与导电片 42b连接, 插接件 43b位于盒体 41b外且通过线缆 44b与导电块连接。 可选地, 汇流条 131和导电片 42b可以为焊接连接或卡合连接。
根据本发明实施例的双玻光伏电池组件, 解决了现有的接线盒难以更换、 以及焊接 汇流条容易造成二极管脱焊的问题, 延长使用寿命。 另外, 接线盒的安装简单, 所需 线缆和汇流条少, 减小了电阻且增大了功率输出。
根据本发明一些实施例的双玻光伏电池组件中,端部密封块 3可以为丁基橡胶件或 聚异丁烯橡胶件、或水汽透过率低于 0. 01g/m2/天的粘结胶件, 由此弥补了传统的光伏 组件边缘将封装材料暴露在外的不足, 结合上下层密实的第一玻璃层 11和第二玻璃层 15, 能够很好的阻隔环境中的水汽、 腐蚀性气体进入组件内部, 减慢组件衰减, 延长 组件寿命。 由此, 使得根据本发明的双玻电池组件, 耐候性好、 结构强度高, 寿命长, 对紫外线吸收率高。
在进一步的实施例中, 根据本发明的双玻光伏电池组件还可以包括多个固定装置 5, 多个固定装置 5设在第二玻璃层 15的远离电池片组层 13的一侧表面上, 用于通过 固定装置 5将整个电池组件安装至某处。 具体而言, 如图 2所示, 电池组件的背面使用 高强度粘结胶粘接四块固定装置 5, 由此可以将固定装置 5通过螺钉固定在用于固定电池 组件的支架 (图未示出) 上。 这种方式的安装保证电池组件的受力更加均匀, 增强了组件 承受载荷的能力, 更加安全可靠。
如图 2所示, 固定装置 5上设置有用于将双玻电池组件固定在外部载体上的定位件。 可选地, 固定装置 5为四个且均匀分布在第二玻璃层 15的表面上, 即整个电池组件的 背面。 由此, 可以方便地将整个电池组件安装至某个安装表面或安装支架 (图未示出) 上。
下面参考图 1-图 4详细描述根据本发明实施例的双玻光伏电池组件中的边框, 其 中以接线盒为设在本体短边上的三个为例进行说明。
如图 1所示, 边框 6可以通过硅胶、 丁基橡胶或双面胶带固定在本体 1的外边缘的 外部。 边框 6形成为框架结构, 且边框 6的横截面具有 U形槽, U形槽的槽口宽度大于 本体 1的厚度以罩在本体 1的外边缘上。
8 PIDM136468P 可选地, 边框 6的厚度为 l_2mm, 即边框 6的 U形槽的每条边的厚度为 l_2mm。 在 一些实施例中, 边框 6的外表面上形成有凸条 62, 如图 3所示。 可选地, 凸条 62沿边 框 6的长度方向延伸。 进一步地, 凸条 62沿边框 6的长度方向直线或曲线延伸, 例如 还可以为螺旋延伸。 通过设置凸条, 可以增加边框 6的整体强度, 并且使得边框 6的 外观更加美观。
边框 6为一条封装条弯折形成的一体边框 6。 具体而言, 该封装条为连续导体, 其 中封装条具有至少两个预定弯折位置, 在每个预定弯折位置处形成 90度的 V形槽 63, 且在封装条上设置接地孔 64。 采用一个连续的边框导体, 原因在于, 如果边框导体的 每段边不连续, 则电池组件在安装时, 每段边都需要接地, 增加成本且安装困难。 优 选地, 接地孔 64的直径为 2-4mm。 另外, 通过将封装条在预定直角位置出形成三个 90 度的 V形槽 63, 使得安装时可以直接折弯成形, 这样折弯后的 90度的 V形槽 63刚好 形成边框的拐角处。
当边框 6和连接件 4均为绝缘的高分子材料件时, 在边框 6上无需开出接地孔 64 和多个 V形槽 63, 而是直接切出需要的尺寸分段进行安装, 即将边框 6与连接件 4依 次连接。
此外,在一些实施例中,第一封装层 12和第二封装层 14为透明硅胶层或聚烯烃层。 由此, 相对于传统的 EVA封装膜, 其优点在于能够透过被 EVA紫外吸收剂吸收的紫外 光线, 转换为电能, 增加光伏组件的输出; 另外, 透明硅胶层或聚烯烃层在紫外光照 射下很稳定, 不会降解产生醋酸等小分子, 腐蚀电池片, 耐候性更好。 具体而言, 透 明硅胶是一种膜状结构, 为热塑性, 常温下为固态, 温度升高后逐渐软化。 透明液体 硅胶是一种双组份硅胶, 常温下为液态, 两个组分以 1 : 1均匀混合好后在 5(T 130 °C下 层压可以固化成为热固性的透明硅胶, 层压温度低, 节省能源, 且有助于延长层压机 寿命。 双玻组件的背板和前板都是刚性的玻璃, 比高分子材料的常规背板更便于涂胶 和层压。 当第一封装层 12和第二封装层 14为聚烯烃层时, 热固性聚烯烃或热塑性聚 烯烃。 组件在实际使用时温度可能达到 8(TlO(TC, 热塑性的膜会软化, 有一定的流动 性, 而热固性膜不会有这个问题, 组件耐温性能更高。
根据本发明的双玻光伏电池组件, 耐候性好、 结构强度高, 寿命长, 对紫外线吸收 率高。
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发明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
9 PIDM136468P 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发明的实施例, 本领域的普通技术人员可以理解: 在不 脱离本发明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, 本发明的范围由权利要求及其等同物限定。
10 PIDM136468P

Claims

权利要求书
1、 一种双玻光伏电池组件, 其特征在于, 包括:
本体, 所述本体包括依次层叠设置的第一玻璃层、 第一封装层、 电池片组层、 第二 封装层、 和第二玻璃层, 所述第一玻璃层和所述第二玻璃层的外边缘超过所述第一封 装层、 电池片组层和第二封装层的外边缘;
反光涂层, 所述反光涂层设在所述第二玻璃层的朝向所述电池片组层的一侧表面 上;
端部密封块, 所述端部密封块设在所述第一玻璃层和所述第二玻璃层之间, 且所述 端部密封块位于第一封装层 /电池片组层 /第二封装层的外周; 以及
边框, 所述边框封装在所述本体的外周边上, 所述边框具有缺口;
接线盒, 所述接线盒设置在所述缺口处, 所述接线盒与所述本体和所述边框封接, 所述电池片组层从所述第一玻璃层和所述第二玻璃层之间引出汇流条, 所述接线盒与 汇流条电连接。
2、 根据权利要求 1所述的双玻光伏电池组件, 其特征在于, 所述反光层对应于所 述电池片组层中的相邻电池片之间的间隙、 和 /或电池片边缘位置设置, 反光涂层为平 板网络状, 所述第一玻璃层为毛玻璃。
3、 根据权利要求 1所述的双玻光伏电池组件, 其特征在于, 所述反光层的截面形 成为顶角为圆弧的大体三角形形状, 所述反光层对应于所述电池片组层中的相邻电池 片之间的间隙、 和 /或电池片边缘位置设置。
4、 根据权利要求 3所述的双玻光伏电池组件, 其特征在于, 对应于所述电池片组 层中的相邻电池片之间的间隙、 和 /或电池片边缘位置设置的所述反光层组成一体网络 板结构。
5、 根据权利要求 3所述的双玻光伏电池组件, 其特征在于, 所述反光涂层为白色 有机高分子涂层。
6、 根据权利要求 3所述的双玻光伏电池组件, 其特征在于, 所述三角形的顶角弧 度为 Π /4-Π /2。
7、 根据权利要求 3所述的双玻光伏电池组件, 其特征在于, 所述三角形的顶角弧 度为 Π /3。
8、 根据权利要求 3所述的双玻光伏电池组件, 其特征在于, 所述三角形的底角角 度为 30-70度。
9、 根据权利要求 8所述的双玻光伏电池组件, 其特征在于, 所述三角形的底角角
11 PIDM136468P 度为 60度。
10、 根据权利要求 1所述的双玻光伏电池组件, 其特征在于, 所述接线盒卡合在所 述本体的外边缘, 且与所述边框通过胶封接。
11、 根据权利要求 10所述的双玻光伏电池组件, 其特征在于, 所述接线盒胶粘在 本体的所述第一玻璃层和所述第二玻璃层上。
12、 根据权利要求 10所述的双玻光伏电池组件, 其特征在于, 所述接线盒的朝向 所述本体的一侧设有两个卡合脚, 所述两个卡合脚卡合在所述本体的外边缘处。
13、根据权利要求 1所述的双玻光伏电池组件,其特征在于,所述本体形成为矩形, 所述接线盒为三个且彼此间隔开地设在所述本体的其中一个短边上, 每相邻两个所述 接线盒之间通过封装连接件相连, 所述封装连接件封装对应于所述缺口处的所述本体 的外边缘。
14、 根据权利要求 13所述的双玻光伏电池组件, 其特征在于, 所述边框为铝材件, 所述封装连接件为绝缘件, 所述边框上具有一个接地孔。
15、 根据权利要求 13所述的双玻光伏电池组件, 其特征在于, 所述边框和所述封 装连接件均为铝材件, 每相邻两个所述接线盒之间的所述封装连接件上均设有一个接 地孔。
16、 根据权利要求 13所述的双玻光伏电池组件, 其特征在于, 所述边框为绝缘件, 所述封装连接件为绝缘件。
17、 根据权利要求 1所述的双玻光伏电池组件, 其特征在于, 所述接线盒为两个且 分别形成为 L形, 所述接线盒设在所述本体的其中两个相邻拐角处, 所述汇流条伸入 所述接线盒内。
18、 根据权利要求 13-17中任一项所述的双玻光伏电池组件, 其特征在于, 所述双 玻光伏电池组件还包括二极管, 所述二极管为贴片式薄片二极管, 所述二极管焊接在 所述汇流条上且层压在所述第一玻璃层和所述第二玻璃层之间。
19、 根据权利要求 1所述的双玻光伏电池组件, 其特征在于, 所述双玻光伏电池组 件为第一玻璃层、 第一封装层、 电池片组层、 第二封装层、 第二玻璃层及端部密封块 层压制得。
20、 根据权利要求 1所述的双玻光伏电池组件, 其特征在于, 所述端部密封块为丁 基橡胶件或聚异丁烯橡胶件。
21、根据权利要求 1所述的双玻光伏电池组件,其特征在于,还包括多个固定装置, 所述多个固定装置设在所述第二玻璃层的远离所述电池片组层的一侧表面上。
22、 根据权利要求 21 所述的双玻光伏电池组件, 其特征在于, 所述固定装置上设
12 PIDM136468P 置有用于将双玻电池组件固定在外部载体上的定位件。
23、 根据权利要求 21 所述的双玻光伏电池组件, 其特征在于, 所述固定装置为四 个且均匀分布在所述第二玻璃层的所述表面上。
24、 根据权利要求 1所述的双玻光伏电池组件, 其特征在于, 所述边框通过硅胶、 丁基橡胶或双面胶带固定在所述本体的外边缘的外部。
25、 根据权利要求 1所述的双玻光伏电池组件, 其特征在于, 所述边框形成为框架 结构, 且所述边框的横截面具有 U形槽, 所述 U形槽的槽口宽度大于所述本体的厚度 以罩在所述本体的外边缘上。
26、 根据权利要求 25所述的双玻光伏电池组件, 其特征在于, 所述边框的厚度为 l_2mm。
27、 根据权利要求 25所述的双玻光伏电池组件, 其特征在于, 所述边框的外表面 上形成有凸条, 所述凸条沿所述边框的长度方向延伸。
28、 根据权利要求 25所述的双玻光伏电池组件, 其特征在于, 所述边框为一条封 装条弯折形成的一体边框。
29、 根据权利要求 1所述的双玻光伏电池组件, 其特征在于, 所述第一封装层和第 二封装层为透明硅胶层或聚烯烃层。
13 PIDM136468P
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KR20160090898A (ko) 2016-08-01
EP3089355A4 (en) 2017-01-11

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