WO2015096488A1 - 双玻光伏电池组件及其边框 - Google Patents

双玻光伏电池组件及其边框 Download PDF

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Publication number
WO2015096488A1
WO2015096488A1 PCT/CN2014/084531 CN2014084531W WO2015096488A1 WO 2015096488 A1 WO2015096488 A1 WO 2015096488A1 CN 2014084531 W CN2014084531 W CN 2014084531W WO 2015096488 A1 WO2015096488 A1 WO 2015096488A1
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WO
WIPO (PCT)
Prior art keywords
frame
layer
glass
photovoltaic cell
double
Prior art date
Application number
PCT/CN2014/084531
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
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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
Publication of WO2015096488A1 publication Critical patent/WO2015096488A1/zh

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor 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
    • H01L31/04—Semiconductor 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
    • H01L31/042—PV modules or arrays of single PV cells
    • H01L31/048—Encapsulation of modules
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor 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
    • H01L31/04—Semiconductor 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
    • H01L31/054—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means
    • H01L31/0547—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means comprising light concentrating means of the reflecting type, e.g. parabolic mirrors, concentrators using total internal reflection
    • 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
    • H02S30/00—Structural details of PV modules other than those related to light conversion
    • H02S30/10—Frame structures
    • 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
    • H02S40/36—Electrical components characterised by special electrical interconnection means between two or more PV modules, e.g. electrical module-to-module connection
    • 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

  • This invention relates to the field of solar cells, and more particularly to a bezel for a dual glass photovoltaic cell assembly and a dual glass photovoltaic cell assembly having the same. Background technique
  • solar cell modules As a clean energy power generation device, solar cell modules have been widely used worldwide.
  • the most common photovoltaic module structure currently used is a laminate of glass, EVA encapsulant film, cell sheet, and polymer backsheet, and then the laminate is mounted in an aluminum frame (Fig. 13).
  • Fig. 13 Then, according to the need, several pieces of aluminum frame embedded with the panel are integrated into one frame, and the frame is fixed on a support to form a completed solar cell front.
  • the firmness of the solar cell front is critically determined by the aluminum frame structure that is fixed and directly in contact with the panel.
  • the existing aluminum frame structure can basically meet the installation requirements.
  • the aluminum frame structure of the conventional component consumes a large amount of aluminum material, and the cost is high, and special equipment is required for installation, and the process is complicated. Aluminum frames of this construction are also difficult to use on double glass components.
  • the double glass structural components currently on the market are generally borderless, acrylic tape borders, or directly with silicone edge protection.
  • Double-glass components whether it is borderless or using acrylic tape to protect the frame, can not protect the components very well. Since the upper and lower layers are both tempered glass, when there is an external force impacting the edge or the four corners of the component, the component is easily broken, which will give The packaging, transportation, installation and use of components poses significant risks. It is therefore necessary to design a structure that provides optimum protection for the double glass components. At present, some organizations have developed structural silica gel protection component edges, but the process is very complicated and the consistency is poor. Summary of the invention
  • the present invention aims to solve at least one of the technical problems existing in the prior art. To this end, it is an object of the present invention to provide a bezel for a dual glass photovoltaic cell assembly that facilitates transportation and reliability of the battery assembly.
  • Another object of the present invention is to provide a dual glass photovoltaic cell assembly having the bezel.
  • a frame for a double-glass photovoltaic cell assembly is an integral frame formed by bending a package strip, the frame is formed as a frame structure, and a cross section of the frame is Has a U-shaped groove.
  • the bezel according to the present invention has a groove that can cover the outer edge of the body, so that when there is an external force impacting the battery assembly When the edge or the four corners are used, the first glass layer and the second glass layer of the body are prevented from being crushed to the greatest extent, thereby protecting the battery assembly, facilitating transportation and long life, and, in addition, the frame according to the present invention, the structure Simple and low cost.
  • a dual glass photovoltaic cell assembly comprising: a body, the body comprising a first glass layer, a first encapsulation layer, a cell stack layer, a second encapsulation layer, and
  • the second glass layer is the frame according to the first aspect of the present invention, the frame enclosing the outer edge of the body, and the slot width of the U-shaped groove of the frame is larger than the thickness of the body to cover On the outer edge of the body.
  • 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 utmost extent, thereby protecting the battery assembly, facilitating the transmission and having a 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 double-glass photovoltaic cell assembly shown in Figure 9, showing the receiving groove;
  • Figure 13 is a schematic view of a frame of a conventional battery assembly. Reference mark:
  • 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;
  • connection should be understood broadly, and may be either fixed or detachable, unless explicitly stated or defined otherwise.
  • Connected, or connected integrally can be mechanical or electrical; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of the two components.
  • the specific meaning of the above terms in the present invention can be understood in the specific case for 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, the cell stack layer 13, and the second encapsulation layer 14. Specifically, the double-glass photovoltaic cell assembly is pressed by the first glass layer 11, 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 frame 6 is encapsulated on the outer periphery of the body 1 by a sealant.
  • 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.
  • By providing a 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 greatest extent, thereby protecting the battery assembly and facilitating transportation. long life.
  • the bus bar 131 can be effectively taken out from the edge of the body through the bezel 6.
  • the bezel 6 according to an embodiment of the present invention will be specifically described below with reference to Figs.
  • the frame 6 is an integral frame 6 formed by bending a package strip.
  • the frame 6 is formed as a frame structure, and the cross section of the frame 6 has a U-shaped groove.
  • the width of the slot of the U-shaped groove is larger than the thickness of the body 1 to cover the body 1.
  • the bezel 6 may be fixed to the outside of the outer edge of the body 1 by silicone glue, butyl rubber or double-sided tape.
  • 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 side frame 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 can only cover three sides of the body 1 , and of course, only a small portion can be packaged on the fourth side, that is, it may not be a complete frame structure, that is, a notch is formed in the middle of the frame 6 so that Install the junction box.
  • the package strip is a continuous conductor, wherein 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 forming can be directly bent and formed, so that the bent 90-degree V-shaped groove 63 just forms the corner 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 bezel according to the present invention has a U-shaped groove that can cover the outer edge of the body 1, so that when an external force strikes the edge or four corners of the battery assembly, the first glass layer 1 1 and the first body of the body 1 can be avoided to the utmost extent.
  • the two glass layers 15 are crushed, thereby protecting the battery pack, which is easy to transport and has a long life.
  • the bezel according to the present invention is simple in structure and low in cost.
  • 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. It is used on the battery chip, which 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 1 1 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 Interconnected by a package connector 8, the package connector 8 encloses an outer edge of the body 1 corresponding to the notch 60, whereby the package connector 8 and the bezel 6 collectively protect the edge 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 bezel 6 and the package connector 8 can each be made of a variety of materials.
  • the frame 6 is an aluminum member, and the package connector 8 is an insulating member. At this time, 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 disposed in each of the package connectors 8 between adjacent two junction boxes 4.
  • the present invention is not limited thereto, and the bezel 6 and the package connector 8 may both be insulating members. At this time, the bezel 6 and the package connector 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 module 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 11 and the second glass layer 15 In between, it prevents the battery from burning off when the hot spot effect is encountered, and prevents current from flowing back when there is no light.
  • the number of partitions 42a is two, and the two partitions 42a divide the chamber 410 into three sub-chambers, namely a first sub-chamber 401 a, a second sub-chamber 402a, and The 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. Thereby, it is possible to maintain a potting material with good thermal conductivity around the diode 44a, which can lower the temperature of the diode and protect the diode in time.
  • the cavity may be held in the first sub-chamber 401a and the third sub-chamber 403a, and the potting glue may also be poured.
  • the casing 41a includes a box base and a cover (not shown) that are fastened to each other, and the cover and the base 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 accommodating groove 16 is a square groove, and the length of the side of the receiving groove 16 is greater than the side length of the diode 9 0. 2mm.
  • the diode 9 is substantially in close contact with the first glass layer 1 1 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). Grounding, the threading hole 11 is 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 sheet 42b may be welded 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. Of course, the assembly can also be sealed without the use of a sealing block 3.
  • 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).
  • 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 1:1 and then laminated at 50 °C to cure into a thermosetting transparent silica gel. The lamination temperature is low, saving Energy, and help 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 back sheet of polymer material.
  • the thermosetting polyolefin or the thermoplastic polyolefin When the first encapsulation layer 12 and When the second encapsulation 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, thermoplastic film will soften, have a certain flow) Sex, while thermoset films do not have 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及其边框（6）。所述边框（6）为一条封装条弯折形成的一体边框，所述边框（6）形成为框架结构，且所述边框（6）的横截面具有U形槽（61）。

Description

双玻光伏电池组件及其边框
技术领域
本发明涉及太阳能电池领域，尤其是涉及一种用于双玻光伏电池组件的边框和具有 其的双玻光伏电池组件。 背景技术
太阳能电池组件作为一种清洁能源发电装置， 已经在全球范围内广泛应用。 目前使 用最普遍的光伏组件结构是将玻璃、 EVA封装胶膜、 电池片、 高分子材料背板层压后的 层压件， 然后将层压件安装在一个铝边框 （如图 13 ) 内， 然后根据需要再将若干块镶 嵌了电池板的铝边框集成在一个框架内， 框架又固定于一个支座上而组成一个完成的 太阳能电池阵面。 此时太阳能电池阵面的牢固度关键取决于固定并直接与电池板接触 的铝边框结构， 现有铝边框结构基本上能够满足安装要求。
常规组件的铝边框结构消耗大量的铝材，成本较高，并且安装时需要用专用的设备， 工序复杂。 这种结构的铝框也很难使用在双玻组件上。
另外， 现在市场上存在的双玻结构组件一般是无边框、 亚克力胶带边框、 或直接用 硅胶护边。
双玻组件无论是无边框还是使用亚克力胶带保护边框都不能很好的保护组件，由于 上下两层都是钢化玻璃， 当有外力冲击组件边缘或四角时， 组件很容易被撞碎， 这会 给组件的包装、 运输、 安装和使用带来很大的风险。 因此需要设计出一种结构给双玻 组件最佳的保护。 目前也有机构开发出结构硅胶保护组件边缘， 但是工艺非常复杂， 并且 一致性很差。 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 于提出一种用于双玻光伏电池组件的边框， 所述边框使得所述电池组件便于运输且保 护可靠。
本发明的另一个目的在于提出一种具有所述边框的双玻光伏电池组件。
根据本发明第一方面实施例的一种用于双玻光伏电池组件的边框，所述边框为一条 封装条弯折形成的一体边框， 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。
根据本发明的边框， 具有可以包覆本体外边缘的形槽， 这样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， 根据本发明的边框， 结构简单且成 本低。
根据本发明第二方面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、 以及第二玻璃 层； 根据本发明第一方面实施例所述的边框， 所述边框封装本体的外边缘， 且所述边 框的所述 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。
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 容纳槽；
图 13是现有电池组件的边框示意图。 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 "长度"、 "宽度"、 "厚度"、 "上"、 "下" 、 "前" 、 "后" 、 "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" 、 "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。
下面首先参考图 1-图 12简单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 11、 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。
边框 6通过密封胶封装在本体 1的外周边上。 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。 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。
下面参考图 1-图 4具体地描述根据本发明实施例的边框 6。边框 6为一条封装条弯 折形成的一体边框 6， 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。 可选地， 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。
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。
可选地，边框 6可以只封装本体 1的三边，当然也可以在第四边上只封装一小部分， 即可以不是一个完整的框架结构， 也就是说， 缺口形成在边框 6 中间， 以便于安装接 线盒。 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。
根据本发明的边框， 具有可以包覆本体 1外边缘的 U形槽， 这样当有外力冲击电池 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 1 1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， 另外， 根据本发明的边框， 结 构简单且成本低。
下面接着描述具有上述边框的双玻光伏电池组件。
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 /6-5 Π /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 1 1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 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 410分成三个子腔室、 即第一子腔室 401 a、 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。
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。 当然， 组件也可以不使用密封块 3密封。
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。
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(T130 °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 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。

Claims

权利要求书
1、 一种用于双玻光伏电池组件的边框， 其特征在于， 所述边框为一条封装条弯折形成 的一体边框， 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。
2、 根据权利要求 1所述的用于双玻光伏电池组件的边框， 其特征在于， 所述封装条具 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。
3、 根据权利要求 1所述的用于双玻光伏电池组件的边框， 其特征在于， 所述边框的厚 度为 l-2mm。
4、 根据权利要求 1所述的用于双玻光伏电池组件的边框， 其特征在于， 所述边框的外 表面上形成有凸条。
5、 根据权利要求 4所述的用于双玻光伏电池组件的边框， 其特征在于， 所述凸条沿所 述边框的长度方向延伸。
6、 根据权利要求 5所述的用于双玻光伏电池组件的边框， 其特征在于， 所述凸条沿所 述边框的长度方向直线或曲线延伸。
7、 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、 以及第二玻璃层；
根据权利要求 1-6 中任一项所述的边框， 所述边框封装本体的外边缘， 且所述边框的 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。
8、 根据权利要求 7所述的双玻光伏电池组件， 其特征在于， 所述边框通过密封胶设在 所述光伏电池组件的外周边上。
9、 根据权利要求 7所述的双玻光伏电池组件， 其特征在于， 所述边框上设置接地孔。
10、根据权利要求 9所述的双玻光伏电池组件，其特征在于，所述接地孔的直径为 2-4mm。
11、 根据权利要求 7所述的双玻光伏电池组件， 其特征在于， 所述边框为铝材件。
12、 根据权利要求 7 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、 根据权利要求 7 所述的双玻光伏电池组件， 其特征在于， 还包括反光涂层， 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。
14、 根据权利要求 7 所述的双玻光伏电池组件， 其特征在于， 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；
所述双玻光伏电池组件还包括：
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。
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CN203746872U (zh) * 2013-12-27 2014-07-30 比亚迪股份有限公司 双玻电池组件
CN203746873U (zh) * 2013-12-27 2014-07-30 比亚迪股份有限公司 光伏电池组件
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