WO2015096492A1 - 光伏电池组件 - Google Patents
光伏电池组件 Download PDFInfo
- Publication number
- WO2015096492A1 WO2015096492A1 PCT/CN2014/084561 CN2014084561W WO2015096492A1 WO 2015096492 A1 WO2015096492 A1 WO 2015096492A1 CN 2014084561 W CN2014084561 W CN 2014084561W WO 2015096492 A1 WO2015096492 A1 WO 2015096492A1
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- WIPO (PCT)
- Prior art keywords
- photovoltaic cell
- cell module
- module according
- layer
- frame
- Prior art date
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- 229920000098 polyolefin Polymers 0.000 claims abstract description 53
- 238000005538 encapsulation Methods 0.000 claims abstract description 26
- 238000007789 sealing Methods 0.000 claims abstract description 9
- 239000011521 glass Substances 0.000 claims description 15
- 239000005341 toughened glass Substances 0.000 claims description 11
- 238000005452 bending Methods 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 229920005549 butyl rubber Polymers 0.000 claims description 5
- 229920001187 thermosetting polymer Polymers 0.000 claims description 4
- 239000000565 sealant Substances 0.000 claims description 3
- 229920002367 Polyisobutene Polymers 0.000 claims description 2
- 229920001971 elastomer Polymers 0.000 claims description 2
- 229920002397 thermoplastic olefin Polymers 0.000 claims description 2
- 238000004806 packaging method and process Methods 0.000 claims 3
- 239000011248 coating agent Substances 0.000 description 14
- 238000000576 coating method Methods 0.000 description 14
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- -1 acetic acid Chemical class 0.000 description 8
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- 230000000694 effects Effects 0.000 description 5
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- PYGSKMBEVAICCR-UHFFFAOYSA-N hexa-1,5-diene Chemical group C=CCCC=C PYGSKMBEVAICCR-UHFFFAOYSA-N 0.000 description 2
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- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
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- 229920002981 polyvinylidene fluoride Polymers 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
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- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
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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
- H01L31/0488—Double glass encapsulation, e.g. photovoltaic cells arranged between front and rear glass sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
- B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
- B32B17/10009—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
- B32B17/10036—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising two outer glass sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
- B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
- B32B17/10165—Functional features of the laminated safety glass or glazing
- B32B17/10293—Edge features, e.g. inserts or holes
- B32B17/10302—Edge sealing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
- B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
- B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
-
- 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
- H01L31/02—Details
- H01L31/02002—Arrangements for conducting electric current to or from the device in operations
- H01L31/02005—Arrangements for conducting electric current to or from the device in operations for device characterised by at least one potential jump barrier or surface barrier
- H01L31/02008—Arrangements 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
-
- 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
- H01L31/02—Details
- H01L31/02002—Arrangements for conducting electric current to or from the device in operations
- H01L31/02005—Arrangements for conducting electric current to or from the device in operations for device characterised by at least one potential jump barrier or surface barrier
- H01L31/02008—Arrangements 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
- H01L31/0201—Arrangements 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
-
- 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
-
- 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
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/048—Encapsulation of modules
- H01L31/0481—Encapsulation of modules characterised by the composition of the encapsulation material
-
- 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
- H02S40/34—Electrical components comprising specially adapted electrical connection means to be structurally associated with the PV module, e.g. junction boxes
-
- 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
Definitions
- the present invention relates to the field of solar cells, and more particularly to a 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.
- an object of the present invention is to provide a photovoltaic cell module which is excellent in weather resistance, long in life, and high in ultraviolet absorption rate.
- a photovoltaic cell assembly comprising: a light-transmissive upper cover layer, a first polyolefin encapsulating layer, a cell sheet group layer, a second polyolefin encapsulating layer, and a backing plate disposed in sequence, on the light transmission
- An outer edge of the cover plate and the back plate exceeds an outer edge of the first polyolefin encapsulating layer, the cell stack layer, and the second polyolefin encapsulating layer, and an end portion is disposed between the transparent upper cover and the back plate a sealing block, the end seal block being located on an outer circumference of the first polyolefin encapsulating layer, the cell stack layer, and the second polyolefin encapsulating layer.
- the advantage is that the ultraviolet light absorbed by the EVA ultraviolet absorber can be converted.
- the output of the photovoltaic component is increased; and the first polyolefin encapsulating layer and the second polyolefin encapsulating layer are stable under ultraviolet light irradiation, do not degrade to generate small molecules such as acetic acid, corrode the cell sheet, and have better weather resistance.
- an end seal block it can make up for the deficiency of the traditional photovoltaic module edge to expose the package material, and combine the upper and lower layers of the transparent light-transmissive upper cover plate and the back plate, which can well block the water vapor and corrosiveness in the environment. Gas entry component Internally, slows component degradation and extends component life.
- the light transmissive upper cover and the back plate are both glass plates. Therefore, the polyolefin film in the first polyolefin encapsulating layer and the second polyolefin encapsulating layer not only overcomes the problem of insufficient adhesion between the polyolefin and the polymer back sheet in the use of the conventional component, but is prone to occur after prolonged use. Problems such as delamination, polyolefins can establish good adhesion to glass, and can be well combined with dual-wave components.
- FIG. 1 is a cross-sectional view of a photovoltaic cell assembly in accordance with an embodiment of the present invention
- FIG. 2 is a schematic illustration of the photovoltaic cell assembly shown in Figure 1;
- Figure 3 is a schematic cross-sectional view of the frame of the 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 photovoltaic cell assembly shown in Figure 1;
- FIG. 6 is a schematic view of a junction box in a 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 photovoltaic cell assembly in accordance with another embodiment of the present invention.
- Figure 9 is a partial enlarged view of the 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 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 backing plate of the photovoltaic cell assembly shown in Figure 9, showing the receiving groove. Reference mark:
- a second polyolefin encapsulation layer 14 a second polyolefin encapsulation layer 14; a backing plate 15; a receiving groove 16;
- Reflective coating 2 Reflective coating 2 ; end seal block 3 ;
- 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.
- a photovoltaic cell module comprises: a body 1 and an end seal block 3.
- the body 1 includes a light-transmissive upper cover 11 , a first polyolefin encapsulation layer 12 , a cell stack layer 13 , a second polyolefin encapsulation layer 14 , and a back plate 15 which are sequentially stacked and disposed in a stack.
- the outer edges of the light transmissive upper cover 1 1 and the back plate 15 exceed the first polyolefin encapsulation layer 12, the cell stack layer 13 and the second polyolefin encapsulation layer 14 The outer edge.
- the light transmissive upper cover 11 and the back plate 15 are both glass plates.
- the light-transmissive upper cover 11 may be ordinary low-iron ultra-white embossed tempered glass or coated low-iron ultra-white embossed tempered glass
- the back plate 15 may be ordinary low-iron ultra-white embossed tempered glass or ordinary tempered glass.
- the end seal block 3 is disposed between the light transmissive upper cover 11 and the back plate 15, and the end seal block 3 is located on the outer periphery of the first polyolefin encapsulation layer 12, the cell stack layer 13, and the second polyolefin encapsulation layer 14. .
- the photovoltaic cell module is pressed by the light-transmitting upper cover 11, the first polyolefin encapsulating layer 12, the cell stack 13, the second polyolefin encapsulating layer 14, the backing plate 15, and the end seal block.
- the photovoltaic cell module of the present invention since the first polyolefin encapsulating layer 12 and the second polyolefin encapsulating layer 14 are used, compared with the conventional EVA encapsulating film, it is advantageous in that it can transmit ultraviolet light absorbed by the EVA ultraviolet absorbent. Converting to electrical energy, increasing the output of the photovoltaic module; and the first polyolefin encapsulating layer 12 and the second polyolefin encapsulating layer 14 are stable under ultraviolet light, do not degrade to produce small molecules such as acetic acid, corrode the cell, and have weather resistance. better.
- an end seal block it can make up for the deficiency of the traditional photovoltaic module edge to expose the package material, and combine the upper and lower layers of the transparent light-transmissive upper cover plate and the back plate, which can well block the water vapor and corrosiveness in the environment. Gas enters the interior of the assembly, slowing component degradation and extending component life.
- the method further includes: a reflective coating 2, a junction box 4, and a bezel 6.
- the reflective coating 2 is provided on the side surface of the back sheet 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 network, and the light-transmissive upper cover 11 is frosted glass.
- 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 battery panel layer 13 leads the bus bar 131 from between the transparent upper cover 11 and the back plate 15.
- the junction box 4 is electrically connected to the bus bar 131 to extract the energy of the battery chip.
- 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.
- the light entering from the light-transmitting upper cover 11 into the gap of the cell sheet is The triangular reflective coating 2 with a circular chamfer is reflected, and the reflected light is incident on the light-transmissive upper cover 1 1 and continues to be reflected onto the battery, thereby further improving the utilization of photons and improving the output of the battery assembly. power.
- 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 a polymer layer and a silica gel has high reflectivity and excellent aging resistance.
- the reflective coating 2 is closely attached 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. Therefore, the junction box 3 is mounted on the edge of the battery pack, instead of being opened or slotted in the back of the assembly, maintaining the complete structure of the back panel 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.
- one side of the junction box 4 facing the body 1 is provided with two engaging legs (not shown), and the two engaging legs are respectively engaged at the outer edge of the body 1.
- the junction box 4 is glued to the light transmissive upper cover 1 1 and the back plate 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 photovoltaic cell assembly according to the embodiment of the present invention is protected by the U-shaped rigid frame and the package connector 8, the edge of the battery assembly and the impact resistance of the four corners are greatly improved. And further strengthen the sealing effect of the battery assembly.
- 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 module according to the present embodiment may further include a chip type sheet diode 9 soldered on the bus bar 131 and laminated between the light transmissive upper cover plate 1 1 and the back plate 15 , to prevent the battery from burning off when the hot spot effect is encountered, and to prevent current from flowing back when there is no light.
- a chip type sheet diode 9 soldered on the bus bar 131 and laminated between the light transmissive upper cover plate 1 1 and the back plate 15 , to prevent the battery from burning off when the hot spot effect is encountered, and to prevent 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 photovoltaic cell assembly includes a chip-type thin film diode 9 and a thin-film diode 9 is soldered on the bus bar 131 and laminated between the light-transmitting upper cover 11 and the back plate 15. , to prevent the battery from burning off when the hot spot effect is encountered, and to prevent current 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.
- 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 side length of the thin film diode 9 is 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 it will withstand the light transmissive upper cover 11 and the back plate 15 located above and below it.
- the thickness H of the diode 9 is 0.8-2 mm, and at this time, at least one of the opposite sides of the light-transmitting upper cover 11 and the back plate 15 is formed with the receiving groove 16
- the receiving groove 16 is formed on the backing plate 15.
- the receiving groove 16 is a square groove, and the side length of the receiving groove 16 is greater than the side length of the diode 9 by 0. 2 mm.
- the diode 9 is substantially the same as the light-transmitting upper cover 11 and the back plate 15 located above and below it. The close contact makes it possible to conduct the heat generated by the diode 9 very quickly.
- 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 photovoltaic cell assembly according to the embodiment of the present 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 of the butyl rubber member or the polyisobutylene rubber member, or the water vapor transmission rate of less than 0.01 g / m 2 / day, by the photovoltaic module, according to some embodiments of the present invention This makes up for the deficiency of the traditional photovoltaic module edge to expose the packaging material.
- the water vapor and corrosive gas in the environment can be well blocked from entering the component. Slow down component degradation and extend component life.
- the double glass battery module according to the present invention has good weather resistance, high structural strength, long life, and high ultraviolet absorption.
- the photovoltaic cell assembly according to the present invention may further comprise a plurality of fixing devices 5 disposed on a side surface of the backing plate 15 remote from the cell stack layer 13 for fixing Device 5 mounts the entire battery pack somewhere.
- 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 load-bearing capacity of the components, 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 backing plate 15, i.e., the back of the entire battery pack. Thereby, it is convenient to mount the entire battery assembly to a certain mounting surface or mounting bracket (not shown).
- a bezel in a photovoltaic cell module according to an embodiment of the present invention will be described in detail below with reference to Figs. 1 to 4, wherein three of the 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 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 is an integral frame 6 formed by bending a package strip.
- the package strip is a continuous conductor
- the middle 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 provided on 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 the cost and is difficult to install.
- the grounding hole 64 has a diameter of 2-4 mm.
- three 90-degree V-shaped grooves 63 are formed by forming the package strip at a predetermined right angle position so that the package 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 first polyolefin encapsulating layer 12 and the second polyolefin encapsulating layer 14 are a transparent silica gel layer or a polyolefin layer. 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 the temperature rises.
- 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 components are rigid glass, which is easier to apply and laminate than the conventional backsheet of polymer materials.
- thermosetting polyolefin or the thermoplastic polyolefin When the layer 12 and the second polyolefin encapsulating layer 14 are polyolefin layers, the thermosetting polyolefin or the thermoplastic polyolefin.
- the temperature of the component may reach 8 in practical use (T lO (TC, thermoplastic film will soften, have certain fluidity) However, the thermosetting film does not have this problem, and the component has higher temperature resistance.
- the photovoltaic cell module according to the present invention has good weather resistance, high structural strength, long life, and high ultraviolet absorption rate.
- Particular features, structures, materials or features described in the examples or examples are included in at least one embodiment or example of the invention.
- the schematic representation of the above terms does not necessarily mean the same embodiment or example.
- the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.
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- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
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Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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US15/107,377 US9997658B2 (en) | 2013-12-27 | 2014-08-15 | Photovoltaic cell module |
EP14873269.6A EP3089219A4 (en) | 2013-12-27 | 2014-08-15 | Photovoltaic cell module |
KR1020167016826A KR101858374B1 (ko) | 2013-12-27 | 2014-08-15 | 광전지 모듈 |
JP2016542935A JP2017500751A (ja) | 2013-12-27 | 2014-08-15 | 光電池モジュール |
Applications Claiming Priority (2)
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CN201320877710.3U CN203774347U (zh) | 2013-12-27 | 2013-12-27 | 光伏电池组件 |
CN201320877710.3 | 2013-12-27 |
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WO2015096492A1 true WO2015096492A1 (zh) | 2015-07-02 |
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PCT/CN2014/084561 WO2015096492A1 (zh) | 2013-12-27 | 2014-08-15 | 光伏电池组件 |
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US (1) | US9997658B2 (zh) |
EP (1) | EP3089219A4 (zh) |
JP (1) | JP2017500751A (zh) |
KR (1) | KR101858374B1 (zh) |
CN (1) | CN203774347U (zh) |
WO (1) | WO2015096492A1 (zh) |
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Also Published As
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JP2017500751A (ja) | 2017-01-05 |
US20170005215A1 (en) | 2017-01-05 |
KR20160090355A (ko) | 2016-07-29 |
EP3089219A4 (en) | 2017-01-04 |
KR101858374B1 (ko) | 2018-05-15 |
EP3089219A1 (en) | 2016-11-02 |
US9997658B2 (en) | 2018-06-12 |
CN203774347U (zh) | 2014-08-13 |
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