CN111816724B - Photovoltaic module, back plate of photovoltaic module and manufacturing method of photovoltaic module - Google Patents

Photovoltaic module, back plate of photovoltaic module and manufacturing method of photovoltaic module Download PDF

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Publication number
CN111816724B
CN111816724B CN202010712100.2A CN202010712100A CN111816724B CN 111816724 B CN111816724 B CN 111816724B CN 202010712100 A CN202010712100 A CN 202010712100A CN 111816724 B CN111816724 B CN 111816724B
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layer
photovoltaic module
battery
heat
conductive layer
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CN202010712100.2A
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CN111816724A (en
Inventor
陈道远
薛文娟
周艳方
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Shanghai Ja Solar Pv Technology Co ltd
JA Solar Technology Yangzhou Co Ltd
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Shanghai Ja Solar Pv Technology Co ltd
JA Solar Technology Yangzhou Co Ltd
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Priority to CN202010712100.2A priority Critical patent/CN111816724B/en
Priority to PCT/CN2020/112082 priority patent/WO2022016662A1/en
Priority to US17/614,310 priority patent/US20220320356A1/en
Priority to EP20931723.9A priority patent/EP3971994B1/en
Publication of CN111816724A publication Critical patent/CN111816724A/en
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    • 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
    • H01L31/052—Cooling means directly associated or integrated with the PV cell, e.g. integrated Peltier elements for active cooling or heat sinks directly associated with the 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
    • H01L31/049—Protective back sheets
    • 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
    • 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
    • H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/52—PV systems with concentrators
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Abstract

At least some embodiments of the present disclosure provide photovoltaic modules and methods of making the same. The photovoltaic module includes: a plurality of battery cells arranged in an array and configured to receive light and generate power; the heat conduction layer is in a net shape and comprises a framework part and a hollowed-out part surrounded by the framework part. In the thickness direction of the photovoltaic module, at least one part of the framework part is overlapped with a gap between adjacent battery units, and the hollowed-out part is overlapped with the battery units. The photovoltaic module can timely conduct heat at the hot spots of the photovoltaic module while ensuring the power generation efficiency of the photovoltaic module, so that the stability of the photovoltaic module is improved.

Description

Photovoltaic module, back plate of photovoltaic module and manufacturing method of photovoltaic module
Technical Field
The present disclosure relates to a photovoltaic module, a back sheet of a photovoltaic module, and a method of manufacturing a photovoltaic module.
Background
Nowadays, with the increasing demand of high-power components in the photovoltaic industry, the power of the components has been developed to be more than 500W, and increasing the size of the battery piece is the simplest way, and 210mm battery pieces are already available in the industry. After the battery piece is enlarged, even if a half slicing mode is adopted, the temperature of hot spots of the assembly can be increased due to the increase of current; in order to ensure the output power of the assembly, a manufacturer adopts a one third slicing mode, and thirty one third slicing battery pieces are used for each string, so that the temperature of hot spots can be increased due to excessive battery pieces in each string. The hot spot effect of the photovoltaic module refers to the phenomenon that under a certain condition, the shaded solar cell modules in the series branch are used as loads to consume energy generated by other illuminated solar cell modules, and the shaded solar cell modules generate heat at the moment. The hot spot temperature can reach more than 170 degrees.
The damage caused by the hot spot effect of the photovoltaic module is great, and the shielded photovoltaic module consumes part of energy or all energy generated by the illuminated photovoltaic module, reduces the output power, and seriously and permanently damages the solar cell module, even burns out the module. Therefore, lowering the hot spot temperature of large-sized components is an urgent problem to be solved.
At present, in order to reduce the hot spot temperature, a photovoltaic module adopts a heat dissipation aluminum backboard structure to dissipate heat of the photovoltaic module. In recent years, with the improvement of the efficiency of the photovoltaic module, a bifacial photovoltaic cell unit, that is, a photovoltaic cell unit that can generate electricity by receiving sunlight not only on the front surface of the photovoltaic cell but also on the back surface of the photovoltaic cell, has been increasingly adopted. However, since the aluminum layer is opaque, shielding of the aluminum layer will affect the power generation of the back side of the double sided cell of the photovoltaic module when the double sided cell is employed by the photovoltaic module. Accordingly, there is an urgent need to provide a novel structure to overcome the problems currently encountered.
Disclosure of Invention
At least some embodiments of the present disclosure provide a photovoltaic module comprising: a battery layer comprising a plurality of battery cells arranged in an array and configured to receive light and generate power; and a thermally conductive layer formed of or comprising a thermally conductive material and in thermal communication with the battery layer. The heat conduction layer is net-shaped and comprises a framework part and a hollowed-out part surrounded by the framework part. And in the thickness direction of the photovoltaic module, at least a part of the skeleton part is overlapped with a gap between adjacent battery cells, and the hollowed-out part is overlapped with the battery cells.
Since the heat conductive layer includes a skeleton portion extending at least partially along the gap between adjacent cells and a hollowed-out portion overlapping the battery cells. Therefore, on one hand, the heat at the battery unit can be conducted away along the framework part of the heat conducting layer to reduce the temperature at the hot spots, and on the other hand, the light can be allowed to penetrate the photovoltaic module through the hollowed-out part of the heat conducting layer, so that the influence on the illumination quantity of the back surface of the photovoltaic module is reduced. The stability of the photovoltaic module is improved while the power generation efficiency of the photovoltaic module is ensured.
For example, in some embodiments, the photovoltaic module further comprises a first backsheet, the thermally conductive layer being sandwiched between the first backsheet and the cell layer.
For example, in some embodiments, the photovoltaic assembly further includes a first backsheet, the thermally conductive layer being disposed on a side of the first backsheet facing away from the cell layer.
For example, in some embodiments, the photovoltaic module further includes a thermally conductive layer adhesive layer disposed between the first backsheet and the thermally conductive layer to adhere the thermally conductive layer to the first backsheet.
For example, in some embodiments, the photovoltaic module further includes a first adhesive layer disposed between the first backsheet and the cell layer to adhere the cell layer to the first backsheet.
For example, in some embodiments, the skeletal portion of the thermally conductive layer is configured to reflect light.
Therefore, the heat conduction layer can reflect light irradiated onto the heat conduction layer to the battery cell, thereby enhancing the power generation efficiency of the photovoltaic module.
For example, in some embodiments, the skeletal portion of the thermally conductive layer is aluminum foil or copper foil.
The aluminum foil and the copper foil have good heat conduction characteristics, and are favorable for the heat conduction layer to conduct heat.
For example, in some embodiments, the skeletal portion of the thermally conductive layer is plated with tin or nickel.
The skeleton portion plated with tin or nickel will have a higher reflectivity, thereby reflecting more light to the cell, further improving the power generation efficiency of the photovoltaic module.
For example, in some embodiments, a surface of the skeletal portion of the thermally conductive layer facing the battery layer is toothed.
The toothed surface of the backbone portion of the thermally conductive layer facing the battery layer may act as a prism to better reflect light to the battery cells, increasing the power generation efficiency of the photovoltaic module.
For example, in some embodiments, the at least a portion of the backbone portion also overlaps with an edge of the battery cell in the thickness direction.
For example, in some embodiments, the skeletal section includes a plurality of first strip-shaped heat conducting sections extending in a first direction and a plurality of second strip-shaped heat conducting sections extending in a second direction that intersects the first direction.
For example, in some embodiments, the first direction is perpendicular to the second direction.
For example, in some embodiments, the first and second strip-shaped thermally conductive portions have the same width.
For example, in some embodiments, the thermally conductive layer may be formed by stamping a sheet material.
The formation of the heat conductive layer by stamping is advantageous in simplifying the manufacturing process.
For example, in some embodiments, the thermally conductive layer is in a grid-like mesh pattern, and the backbone portion includes a plurality of sub-strip-shaped thermally conductive portions overlapping the battery cells, the plurality of sub-strip-shaped thermally conductive portions overlapping the main grid of the battery cells.
Therefore, the heat at the main grid can be conducted out better.
For example, in some embodiments, the photovoltaic module further comprises a protective layer disposed on a side of the thermally conductive layer facing away from the first backsheet.
For example, in some embodiments, the photovoltaic assembly further includes a second backsheet disposed on a side of the cell layer facing away from the first backsheet and sandwiching the cell layer between the first backsheet and the second backsheet.
For example, in some embodiments, the photovoltaic module further comprises a first backsheet to which the thermally conductive layer is bonded by at least one of screen printing, coating, spraying, sintering.
For example, in some embodiments, the first backsheet comprises a glass layer.
For example, in some embodiments, the first backsheet includes at least one of an insulating barrier layer, a fluorine-containing weatherable layer, an adhesive layer, and a transitional bonding layer.
There is also provided, in accordance with at least some embodiments of the present disclosure, a backsheet for a photovoltaic module, including: the heat conduction layer is in a net shape and comprises a framework part and a hollowed-out part surrounded by the framework part.
The heat conducting layer can be integrally formed with other parts of the first backboard in the manufacturing process of the first backboard, and manufacturing cost is simplified.
For example, in some embodiments, the backsheet further comprises an adhesive layer; and at least one of an insulating barrier layer, a fluorine-containing weatherable layer, and a transitional bonding layer. The thermally conductive layer is adjacent to at least one of the adhesive layers.
There is also provided, in accordance with at least some embodiments of the present disclosure, a photovoltaic module, including: a battery layer including a plurality of battery cells arranged in an array; and a back sheet as described above, the battery layer being bonded to the back sheet by a first adhesive layer.
There is also provided, in accordance with at least some embodiments of the present disclosure, a method of manufacturing a photovoltaic module, including: providing a back plate as described above; and laminating a battery layer on the adhesive layer of the first back sheet, wherein the battery layer comprises a plurality of battery cells, the battery cells are arranged in an array form, the lamination is carried out so that at least a part of the framework part overlaps with gaps between adjacent battery cells in the thickness direction of the photovoltaic module, and the hollowed-out part overlaps with the battery cells.
There is also provided, in accordance with at least some embodiments of the present disclosure, a method of manufacturing a photovoltaic module, including: providing a first backboard; laminating a heat conducting layer on the first backboard, wherein the heat conducting layer is net-shaped and comprises a framework part and a hollowed-out part surrounded by the framework part; and stacking a battery layer including a plurality of battery cells on the heat conductive layer, the plurality of battery cells being arranged in an array such that at least a portion of the frame portion overlaps with gaps between adjacent battery cells in a thickness direction of the photovoltaic module, and the hollowed-out portion overlaps with the battery cells.
There is also provided, in accordance with at least some embodiments of the present disclosure, a method of manufacturing a photovoltaic module, including: providing a first backboard; laminating a battery layer on a first side of the first back plate, wherein the battery layer comprises a plurality of battery cells, and the battery cells are arranged in an array form; and laminating a heat conductive layer on a second side of the first back sheet opposite to the first side, the heat conductive layer being in a mesh shape including a skeleton portion and a hollowed portion surrounded by the skeleton portion, and the lamination being such that at least a part of the skeleton portion overlaps with a gap between adjacent battery cells in a thickness direction of the photovoltaic module, the hollowed portion overlapping with the battery cells.
Drawings
Fig. 1 shows a plan view from one side of a photovoltaic module according to an embodiment of the present disclosure;
fig. 2 shows a plan view of the photovoltaic module of fig. 1 from the other side;
FIG. 3 shows a cross-sectional view of the photovoltaic module of FIG. 1;
FIG. 4 shows a plan view of a thermally conductive layer of the photovoltaic module of FIG. 1;
FIG. 5 illustrates a plan view of a first backsheet of the photovoltaic module of FIG. 1;
FIG. 6 illustrates a cross-sectional view of a skeletal portion of a thermally conductive layer and a thermally conductive layer bonding layer in accordance with an embodiment of the present disclosure;
FIG. 7 illustrates a cross-sectional view of a skeletal portion of a thermally conductive layer and a thermally conductive layer bonding layer in accordance with another embodiment of the present disclosure;
fig. 8 illustrates a plan view of a thermally conductive layer according to another embodiment of the present disclosure;
fig. 9 illustrates a plan view of a thermally conductive layer according to another embodiment of the present disclosure;
fig. 10 illustrates a plan view of a thermally conductive layer according to another embodiment of the present disclosure;
FIG. 11 illustrates a cross-sectional view of a photovoltaic module according to another embodiment of the present disclosure;
fig. 12 shows a cross-sectional view of a photovoltaic module according to another embodiment of the present disclosure;
13A-13C illustrate cross-sectional views of a first backsheet of a photovoltaic module according to another embodiment of the present disclosure;
14A-14B illustrate cross-sectional views of a first backsheet of a photovoltaic module according to another embodiment of the present disclosure;
fig. 15 illustrates a cross-sectional view of a first backsheet of a photovoltaic module according to another embodiment of the present disclosure;
fig. 16 illustrates a cross-sectional view of a first backsheet of a photovoltaic module according to another embodiment of the present disclosure;
fig. 17 illustrates a cross-sectional view of a first backsheet of a photovoltaic module according to another embodiment of the present disclosure;
fig. 18 illustrates a cross-sectional view of a first backsheet of a photovoltaic module according to another embodiment of the present disclosure;
Fig. 19 shows a cross-sectional view of a double sided battery cell.
Detailed Description
Photovoltaic modules are generally plate-like or sheet-like, which extend substantially in a plane and have a certain thickness. For convenience and clarity in describing the photovoltaic module according to the present disclosure, a direction perpendicular to a plane in which the photovoltaic module extends is defined as a "thickness direction". In the following description and in the appended claims, a feature is "in thermal communication" or "thermally coupled" with another feature to include not only the one feature being in thermal communication with the other feature, but also an intermediate feature between the one feature and the other feature through which heat from the one feature is transferred to the other feature, the heat transfer including not only heat conduction, but also various forms of heat transfer including heat radiation, heat convection, and the like, and the invention is not limited to any particular form.
A photovoltaic module generally includes a backsheet and a cell layer disposed on the backsheet in which a plurality of cells are arranged in an array. The battery cell may be a single sided battery cell or a double sided battery cell. A single-sided battery cell is a battery cell that can receive light from only one side and convert the light into electric power. The double sided battery cell is a battery cell capable of receiving light from both sides and converting the light into electric power. The photovoltaic module including the double-sided battery cell can receive not only direct irradiation of sunlight from one side (i.e., the front side) to convert it into electric power, but also light such as reflected light or scattered light from the ground from the other side (i.e., the rear side), thereby improving the power generation efficiency of the photovoltaic module. For example, fig. 19 shows a cross-sectional view of a double sided battery cell. As shown, the double-sided battery cell includes a metal front electrode 141, a front surface anti-reflection film 142, a boron doped emission layer 143, an n-type silicon layer 145, a phosphorus doped back field (BSF) layer 146, a back anti-reflection film 147, and a metal back electrode 148. The battery cells may have other configurations as well, and the present disclosure is not limited thereto.
As mentioned above, the photovoltaic module may generate hot spots that damage the photovoltaic module, and it is necessary to reduce the temperature of the photovoltaic module when the hot spots occur, thereby improving the reliability of the photovoltaic module. A photovoltaic module adopts a heat dissipation aluminum backboard structure to dissipate heat of the photovoltaic module, however, because aluminum is opaque, when the photovoltaic module adopts a double-sided battery unit, shielding of an aluminum layer affects the generated energy of the back surface of the double-sided battery unit of the photovoltaic module.
A photovoltaic module according to embodiments of the present disclosure has a thermally conductive layer in a mesh shape that is in thermal communication with a cell layer and includes a backbone portion and a hollowed-out portion surrounded by the backbone portion. The skeleton portion is made of or comprises a thermally conductive material. In the thickness direction of the photovoltaic module, at least one part of the skeleton part of the heat conducting layer is overlapped with a gap between adjacent battery units, and the hollowed-out part of the heat conducting layer is overlapped with the battery units. That is, at least a portion of the skeleton portion extends along the gap between adjacent battery cells, and the hollowed-out portion is provided at the battery cells. Therefore, on the one hand, the heat generated by the battery cells can be conducted away along the skeleton portion of the heat conducting layer, and on the other hand, light (such as reflected light from the ground, scattered light, etc.) can be allowed to pass through the hollowed-out portion of the heat conducting layer from one side (back surface) toward the other side (front surface) of the photovoltaic module to be received by the back surface of the battery cells, so that the influence on the illumination amount of the back surface of the photovoltaic module is reduced. The heat at the hot spots of the photovoltaic module is conducted out in time while the back power generation capacity of the photovoltaic module with double-sided power generation is guaranteed, and the temperature of the photovoltaic cell at the hot spots is restrained. Therefore, the stability of the photovoltaic module is improved while the power generation efficiency of the photovoltaic module is ensured.
It should be noted that, although the photovoltaic module according to the embodiment of the present disclosure is described specifically with reference to the double-sided battery cell as an example, the present disclosure is not limited thereto.
Fig. 1 illustrates a plan view of a photovoltaic module according to an embodiment of the present disclosure, viewed from one side (front), fig. 2 illustrates a plan view of the photovoltaic module of fig. 1, viewed from the other side (back), fig. 3 illustrates a cross-sectional view of the photovoltaic module of fig. 1, fig. 4 illustrates a plan view of the heat conductive layer 130 of the photovoltaic module of fig. 1, and fig. 5 illustrates a plan view of the first backsheet 110 of the photovoltaic module of fig. 1. In fig. 1, in order to clearly show the first back plate 110 and the heat conductive layer 130 disposed thereon, only the first back plate 110, the heat conductive layer 130, and the battery layer 140 (taking one battery cell in the battery layer as an example) are shown, and other components are omitted. In fig. 2, only the battery layer 140 and the heat conductive layer 130 are shown, and other components are omitted.
As shown in fig. 1 to 5, a photovoltaic module according to an embodiment of the present disclosure includes a first back sheet 110, a heat conductive layer 130 disposed on the first back sheet 110, a battery layer 140 including a plurality of battery cells disposed on the heat conductive layer 130, a second back sheet 150 covering the battery layer 140, the battery layer 140 being bonded to the second back sheet 150 by a second adhesive layer 122 and to the first back sheet 110 by a first adhesive layer 121, thereby being packaged into a photovoltaic module.
For example, the first and second backsheets 110, 150 may be glass backsheets or the like, or the first backsheet 110 may be of other materials, such as a high molecular polymer material including, for example, an insulating barrier layer, a fluorine-containing weatherable layer, an adhesive layer, or a transitional bonding layer, or the like. For example, the first adhesive layer 121 and the second adhesive layer 122 may be EVA (ethylene vinyl acetate) or POE (polyethylene-octene elastomer) or the like.
The heat conducting layer 130 is in a net shape, and comprises a skeleton portion 130a and a hollowed-out portion 130b surrounded by the skeleton portion 130a, wherein the skeleton portion 130a is formed by or contains a heat conducting material. As shown in fig. 3, in the thickness direction of the photovoltaic module, at least a portion of the backbone portion 130a overlaps with a gap between the battery cells and covers an edge portion of an adjacent battery cell, thereby forming thermal communication with the battery cell, and the hollowed-out portion 130b overlaps with the battery cell. In an embodiment, the hollowed-out portion 130b is filled with the first adhesive layer 121.
In one aspect, when hot spots occur, the temperature of the battery cells at which the hot spots occur is, for example, 105 ℃ or higher, and the temperature of the battery cells at the periphery is, for example, about 60 ℃, and due to the presence of a temperature gradient, heat will be thermally conductively diffused from a high temperature region to a low temperature region at the hot spots through the skeletal portion 130a of the heat conductive layer 130, thereby reducing the temperature at the hot spots.
On the other hand, light can pass through the hollowed-out portion 130b of the heat conducting layer 130 and be transmitted through the photovoltaic module, so that the influence on the illumination quantity of the back surface of the photovoltaic module is reduced, and the back surface generating capacity of the photovoltaic module is ensured.
In the present embodiment, the skeletal part 130a of the heat conductive layer 130 includes a plurality of first strip-shaped heat conductive parts 132 extending in a first direction (up-down direction in fig. 1, 2 and 4) and a plurality of second strip-shaped heat conductive parts 133 extending in a second direction (left-right direction in fig. 1, 2 and 4) perpendicular to the first direction, the first strip-shaped heat conductive parts 132 and the second strip-shaped heat conductive parts 133 forming a mesh shape. As shown in fig. 3, in the thickness direction of the photovoltaic module, the first or second strip-shaped heat conductive portions 132 or 133 of the heat conductive layer 130 overlap with gaps between adjacent battery cells. That is, the first and second bar-shaped heat conductive parts 132 and 133 are arranged to extend along the gaps between the adjacent battery cells. And the hollowed-out portion 130b of the heat conductive layer 130 formed between the first and second bar-shaped heat conductive portions 132 and 133 overlaps the battery cells in the thickness direction. Accordingly, the heat conductive layer 130 can reduce the influence on the light transmission photovoltaic module and the back side power generation efficiency of the photovoltaic module while conducting heat at the battery cells.
As shown in fig. 3, in the present embodiment, in order to be able to better conduct heat at the battery cells of the battery layer 140 out, the first and second strip-shaped heat conductive portions 132 and 133 of the heat conductive layer 130 may be arranged to overlap with edges of the battery cells adjacent thereto. However, it will be appreciated by those skilled in the art that in other embodiments, the first and second strip-shaped heat conductive portions 132 and 133 may not overlap with the edges of adjacent battery cells.
In some embodiments, to ensure good thermal conductivity, the thickness of the thermally conductive layer 130 may be in the range of 0.01-1 mm. Further, the widths of the first and second strip-shaped heat conductive portions 132 and 133 may be in the range of 5-50 mm.
Further, the heat conductive layer 130 is also configured to be capable of reflecting light, and therefore, as shown in fig. 3, the light irradiated onto the heat conductive layer 130 can be reflected and then irradiated to the front side of the battery cell by, for example, the reflection of the back side of the second back sheet 150, thereby enhancing the front power generation efficiency of the photovoltaic module. For example, the thermally conductive layer 130 is configured to reflect at least 50%, at least 60%, at least 70%, at least 80%, or at least 90% of light incident thereon.
For example, the heat conductive layer 130 may be a heat conductive material such as aluminum foil, copper foil, or the like. To enhance the reflective properties of the thermally conductive layer 130, the thermally conductive layer 130 may be tin plated or nickel plated.
Fig. 6 illustrates a cross-sectional view of the skeletal portion 130a of the thermally conductive layer 130 and the thermally conductive layer adhesive layer 131 in accordance with an embodiment of the present disclosure. The heat conductive layer adhesive layer 131 (not shown in fig. 3) is disposed between the first back plate 110 and the heat conductive layer 130. As shown in fig. 6, the heat conductive layer 130 (specifically, the skeletal portion 130a thereof) is bonded to the first back plate 110 by a heat conductive layer bonding layer 131. The surface of the backbone portion 130a of the heat conductive layer 130 facing the battery layer 140 may be a flat surface. Fig. 7 illustrates a cross-sectional view of a skeletal portion 130a of a thermally conductive layer 130 and a thermally conductive layer adhesive layer 131 according to another embodiment of the present disclosure. As shown in fig. 7, the surface of the backbone portion 130a of the heat conductive layer 130 facing the battery layer 140 may also be toothed, which serves as a prism to better reflect light to the battery cells of the battery layer 140, increasing the power generation efficiency of the front side of the photovoltaic module.
For example, the heat conductive layer adhesive layer 131 may include EVA, POE, EAA, EEA (ethylene-ethyl acrylate), PP (polypropylene), SIS (styrene-isoprene-styrene), SBS (styrene-butadiene-styrene), and the like. For example, the heat conductive adhesive layer 131 may be EVA, POE, PP, which may be pressed onto the first back plate 110 at high temperature. Alternatively, the heat conductive layer adhesive layer 131 may be a blend resin of EVA, EAA (ethylene acrylic acid), SIS, which may be pressed onto the first back sheet 110 at high temperature. For example, such a thermally conductive layer adhesive layer 131 may be heat-pressed together with the first adhesive layer 121 and the second adhesive layer 122 to form a photovoltaic module. Alternatively, the heat conductive layer adhesive layer 131 may be a blend resin of EVA, EEA, SBS, which may be pressed onto the first back plate 110 at a low temperature or a normal temperature. The present disclosure is not limited thereto.
The thermally conductive layer 130 in the embodiment shown in fig. 1-5 may be formed by a variety of methods. In one embodiment, the first and second strip-shaped heat conductive portions 132 and 133 are adhered to the first back plate 110, respectively, to form a heat conductive layer. For example, a rolled band of a strip-shaped aluminum foil may be unrolled and attached to the first back plate 110 to form the first strip-shaped heat conductive portion 132, and then the rolled band of the strip-shaped aluminum foil may be unrolled and attached to the first back plate 110 to form the second strip-shaped heat conductive portion 133, the first strip-shaped heat conductive portion 132 and the second strip-shaped heat conductive portion 133 intersecting each other to form a mesh pattern, thereby forming the skeleton portion 130a of the heat conductive layer 130, and the portions surrounded by the first strip-shaped heat conductive portion 132 and the second strip-shaped heat conductive portion 133 form the hollowed-out portion 130b of the heat conductive layer 130. For example, the first and second strip-shaped heat conductive portions 132 and 133 may have the same width. Thereby, the first and second strip-shaped heat conductive portions 132 and 133 can be formed using the same winding tape, reducing costs and facilitating manufacturing. The first and second strip-shaped heat conductive parts 132 and 133 may also have different widths as required.
In another embodiment, the pattern of the heat conductive layer 130 composed of the skeleton portion 130a and the hollowed-out portion 130b may also be formed by punching a sheet material. However, the present invention is not limited thereto, and the heat conductive layer may be formed on the first back plate 110 by other means such as screen printing, coating, spraying, sintering, etc.
The heat conductive layer 130 shown in fig. 4 is in a rectangular mesh pattern, but the present disclosure is not limited thereto. Fig. 8-10 illustrate plan views of the thermally conductive layer 130 according to other embodiments of the present disclosure. As shown in fig. 8, the heat conductive layer 130 has a "rice" shaped mesh pattern. As shown in fig. 9, the heat conductive layer 130 is in a honeycomb mesh pattern. As shown in fig. 10, the heat conductive layer 130 is in a grid-like mesh pattern. The patterns shown in fig. 8 and 10 add a frame portion 130a overlapping the battery cells on the basis of the first and second bar-shaped heat conductive portions 132 and 133 shown in fig. 4. The rectangular mesh pattern shown in fig. 4 has less influence on the back side power generation efficiency of the photovoltaic module, and the heat conductive layer 130 shown in fig. 8 to 10 has a larger overlapping area with the battery cells, so that the heat conductive efficiency is higher. The specific pattern of the thermally conductive layer 130 may be designed according to different needs.
The heat conductive layer 130 shown in fig. 10 is in a grid-like mesh pattern, and a light shielding region where the frame portion 130a overlaps the battery cells includes a plurality of sub-strip-shaped heat conductive portions 134, and the plurality of sub-strip-shaped heat conductive portions 134 preferably overlap the main grid of the battery cells. Since the plurality of sub-strip-shaped heat conductive parts 134 are overlapped with the main grid of the battery cell, they can rapidly conduct heat at the main grid, so that the phenomenon of melting solder at the main grid due to local overheating can be maximally reduced. Here, the main grid is a bus line connected to the fine grid (e.g., front electrode, back electrode of the battery cell) to collect current from the fine grid.
The photovoltaic module may also have other laminated structures.
Fig. 11 shows a cross-sectional view of a photovoltaic module according to another embodiment of the present disclosure. As shown in fig. 11, the photovoltaic module includes a first back sheet 210, a first adhesive layer 221 disposed on a first surface of the first back sheet 210, a battery layer 240 including a plurality of battery cells disposed on the first adhesive layer 221, a second adhesive layer 222 covering the battery layer 240, a second back sheet 250 disposed on the second adhesive layer 222, and a heat conductive layer 230 disposed on a second surface of the first back sheet 210 opposite to the first surface. In order to increase the heat conduction efficiency of the heat conduction layer 230, the frame portion of the heat conduction layer 230 overlaps with the edge of the battery cell adjacent thereto in the thickness direction. Alternatively, since the heat conductive layer 230 is exposed to the atmosphere, in order to protect the heat conductive layer 230, a fluorine resin layer 260 serving as a protective layer may be provided on the opposite side of the heat conductive layer 230 from the first back plate 210, for example, by spraying.
Fig. 12 shows a cross-sectional view of an assembly according to another embodiment of the present disclosure. As shown in fig. 12, the photovoltaic module includes a first back sheet 310, a first adhesive layer 321 disposed on a first surface of the first back sheet 310, a battery layer 340 including a plurality of battery cells disposed on the first adhesive layer 321, a second adhesive layer 322 covering the battery layer 340, a second back sheet 350 disposed on the second adhesive layer 322, and a heat conductive layer 330 disposed on a second surface of the first back sheet 310 opposite to the first surface. In order to increase the heat conduction efficiency of the heat conduction layer 330, the frame portion of the heat conduction layer 330 overlaps with the edge of the battery cell adjacent thereto in the thickness direction. Unlike the photovoltaic module shown in fig. 11, in order to protect the heat conductive layer 330, a fluorine-containing weather resistant layer 380 serving as a protective layer may be provided on the opposite side of the heat conductive layer 330 from the first back sheet 310, the fluorine-containing weather resistant layer 380 being attached to the heat conductive layer 330 by an adhesive layer 370. For example, the adhesive layer 370 may be a blend resin of polyurethane, EVA, POE, PP or EVA, EAA, SIS or a blend resin of EVA, EEA, SBS.
Fig. 13A-18 respectively illustrate cross-sectional views of a first backsheet of a photovoltaic module according to another embodiment of the present disclosure. As shown in fig. 13A-18, the thermally conductive layer may also be incorporated into the first back plate rather than being disposed on the first back plate separately from the first back plate. In the embodiment shown in fig. 13A-18, the thermally conductive layer in the first back plate is mesh-shaped, and a battery layer including a plurality of battery cells is disposed on the first back plate. At least a part of the skeleton portion of the heat conductive layer overlaps with a gap between adjacent battery cells and an edge of the battery cell adjacent thereto in the thickness direction, and the hollowed-out portion of the heat conductive layer overlaps with the battery cell in the thickness direction.
As shown in fig. 13A, in an example, the first back sheet may include a stacked heat conductive layer 407, a first adhesive layer 406, a fluorine-containing weather resistant layer 405, a second adhesive layer 404, an insulating barrier layer 403, a third adhesive layer 402, and a transitional adhesive layer 401 in this order. The battery layer may be attached to the transition adhesive layer 401, for example, by a first adhesive layer (e.g., first adhesive layer 121 shown in fig. 3). The transitional bonding layer facilitates bonding of the first backsheet to the battery layer. As shown in fig. 13B and 13C, since the heat conductive layer 407 is net-shaped, including a skeleton portion and a hollowed portion, the hollowed portion may be filled with air (see fig. 13B) or with the first adhesive layer 406 adjacent thereto (see fig. 13C).
As shown in fig. 14A, in another example, the first back sheet may include a laminated fluorine-containing weather resistant layer 507, a first adhesive layer 506, an insulating barrier layer 505, a second adhesive layer 504, a heat conductive layer 503, a third adhesive layer 502, and a transitional adhesive layer 501 in this order. The battery layer may be attached to the transition adhesive layer 501, for example, by a first adhesive layer. As shown in fig. 14B, since the heat conductive layer 503 is net-shaped, including a skeleton portion and a hollowed portion, the hollowed portion may be filled with the third adhesive layer 502 and/or the second adhesive layer 504 adjacent thereto.
As shown in fig. 15, in another example, the first back sheet may include a fluorine-containing weather-resistant layer 607, a first adhesive layer 606, a heat conductive layer 605, a second adhesive layer 604, an insulating barrier layer 603, a third adhesive layer 602, and a transitional adhesive layer 601, which are laminated in this order. The battery layer may be attached to the transition adhesive layer 601, for example, by a first adhesive layer.
As shown in fig. 16, in another example, the first back sheet may include a fluorine-containing weatherable layer 706, a first adhesive layer 705, an insulating barrier layer 704, a second adhesive layer 703, a heat conductive layer 702, and a transitional adhesive layer 701, which are laminated in this order. The battery layer may be attached to the transition adhesive layer 701 by a first adhesive layer, for example.
As shown in fig. 17, in another example, the first back sheet may include a fluorine-containing weatherable layer 806, a first adhesive layer 805, a heat conductive layer 804, a second adhesive layer 803, an insulating barrier layer 802, and a transitional adhesive layer 801, which are laminated in this order. The battery layer may be attached to the transition adhesive layer 801 by a first adhesive layer, for example.
As shown in fig. 18, in another example, the first back sheet may include a thermally conductive layer 906, a first adhesive layer 905, a fluorine-containing weather-resistant layer 904, a second adhesive layer 903, an insulating barrier layer 902, and a transitional adhesive layer 901, which are stacked in this order. The battery layer may be attached to the transition adhesive layer 901, for example, by a first adhesive layer.
For example, the fluorine-containing weathering layer may be a fluorine film such as PVDF (polyvinylidene fluoride) film, TEDLAR (registered trademark) film (polyvinyl fluoride film), fluorocarbon resin, or the like. For example, the first, second, and third adhesive layers may be polyurethane, etc. For example, the insulating barrier layer may be PET (polyethylene terephthalate) or the like. For example, the transitional bonding layer may be EVA, POE, LDPE (low density polyethylene), PVDF film, TEDLAR film (e.g., as shown in fig. 13A-15), or may be a fluororesin such as a fluorocarbon resin (e.g., as shown in fig. 16-18), or the like.
At least one embodiment of the present disclosure also provides a method of manufacturing a photovoltaic module, which may be used to manufacture a photovoltaic module such as described with reference to fig. 3. The manufacturing method may include the steps of: s11, providing a first backboard; s12, laminating a heat conduction layer on the first backboard; and S13, stacking a battery layer comprising a plurality of battery units on the heat conduction layer. The heat conducting layer is net-shaped and comprises a framework part and a hollowed-out part surrounded by the framework part. The plurality of battery cells are arranged in an array. In the thickness direction of the photovoltaic module, at least one part of the framework part is overlapped with a gap between adjacent battery units, and the hollowed-out part is overlapped with the battery units.
At least one embodiment of the present disclosure also provides a method of manufacturing a photovoltaic module, which may be used to manufacture a photovoltaic module such as described with reference to fig. 11 and 12. The manufacturing method may include the steps of: s11, providing a first backboard; s12, stacking a battery layer on the first side of the first backboard; and S13, stacking the heat conduction layer on a second side of the first backboard opposite to the first side. The battery cells are arranged in an array. The heat conducting layer is net-shaped and comprises a framework part and a hollowed-out part surrounded by the framework part. In the thickness direction of the photovoltaic module, at least one part of the framework part is overlapped with a gap between adjacent battery units, and the hollowed-out part is overlapped with the battery units.
At least one embodiment of the present disclosure also provides a method of manufacturing a photovoltaic module, which may be used to manufacture a photovoltaic module such as described with reference to fig. 13A-18. The manufacturing method may include the steps of: s21, providing a first backboard; and S22, stacking the battery unit numbers on the first backboard in an array. The heat conduction layer is in a net shape and comprises a framework part and a hollowed-out part surrounded by the framework part, and in the thickness direction of the photovoltaic module, at least one part of the framework part is overlapped with a gap between adjacent battery units, and the hollowed-out part is overlapped with the battery units. The step S21 of providing the first back sheet includes, for example, laminating a heat conductive layer with at least one of an insulating barrier layer, a fluorine-containing weather-resistant layer, and a transitional bonding layer to form the first back sheet. According to the embodiment, the heat conducting layer can be formed together with the first backboard in the manufacturing process of the first backboard, and manufacturing cost is simplified.
The present specification describes at least the following:
(1) A photovoltaic module, comprising:
a battery layer comprising a plurality of battery cells arranged in an array and configured to receive light and generate power; and
a thermally conductive layer formed of or comprising a thermally conductive material and in thermal communication with the battery layer,
the heat conduction layer is in a net shape and comprises a framework part and a hollowed-out part surrounded by the framework part, and in the thickness direction of the photovoltaic module, at least one part of the framework part is overlapped with a gap between adjacent battery units, and the hollowed-out part is overlapped with the battery units.
(2) The photovoltaic module of item (1), further comprising a first backsheet, the thermally conductive layer being sandwiched between the first backsheet and the cell layer.
(3) The photovoltaic assembly of item (1), further comprising a first backsheet, the thermally conductive layer disposed on a side of the first backsheet facing away from the cell layer.
(4) The photovoltaic module of item (2) or (3), further comprising a thermally conductive layer adhesive layer disposed between the first backsheet and the thermally conductive layer to adhere the thermally conductive layer to the first backsheet.
(5) The photovoltaic module according to item (2) or (3), further comprising a first adhesive layer disposed between the first backsheet and the cell layer to adhere the cell layer to the first backsheet.
(6) The photovoltaic module according to any one of items (1) to (5), wherein
The skeletal portion of the thermally conductive layer is configured to reflect light.
(7) The photovoltaic module according to any one of items (1) to (6), wherein
The skeleton part of the heat conducting layer is aluminum foil or copper foil.
(8) The photovoltaic module according to any one of items (1) to (7), wherein
The skeletal portion of the thermally conductive layer is plated with tin or nickel.
(9) The photovoltaic module according to any one of items (1) to (8), wherein
The surface of the skeleton portion of the heat conduction layer facing the battery layer is toothed.
(10) The photovoltaic module according to any one of items (1) to (9), wherein
In the thickness direction, the at least a part of the skeleton portion overlaps with an edge of the battery cell.
(11) The photovoltaic module according to any one of items (1) to (10), wherein,
the skeletal section includes a plurality of first strip-shaped heat conducting sections extending in a first direction and a plurality of second strip-shaped heat conducting sections extending in a second direction intersecting the first direction.
(12) The photovoltaic module according to item (11), wherein,
the first direction is perpendicular to the second direction.
(13) The photovoltaic module according to item (11) or (12), wherein the first and second strip-shaped heat conductive portions have the same width.
(14) The photovoltaic module according to any one of items (1) to (13), wherein,
the thermally conductive layer may be formed by stamping a sheet material.
(15) The photovoltaic module according to any one of items (1) to (14), wherein,
the heat conduction layer is in a grid-shaped net pattern, the framework part comprises a plurality of sub-strip-shaped heat conduction parts overlapped with the battery units, and the sub-strip-shaped heat conduction parts are overlapped with the main grids of the battery units.
(16) The photovoltaic module according to item (3), further comprising:
and the protective layer is arranged on one side of the heat conduction layer, which is away from the first backboard.
(17) The photovoltaic module according to item (2) or (3), further comprising:
the second backboard is arranged on one side, away from the first backboard, of the battery layer, and the battery layer is clamped between the first backboard and the second backboard.
(18) The photovoltaic module according to item (1), further comprising:
The heat conductive layer is bonded to the first back plate by at least one of screen printing, coating, spraying, sintering.
(19) The assembly according to item (2) or (3), wherein,
the first backsheet includes a glass layer.
(20) The photovoltaic module according to item (2) or (3), wherein,
the first backsheet includes at least one of an insulating barrier layer, a fluorine-containing weatherable layer, an adhesive layer, and a transitional bonding layer.
(21) A backsheet for a photovoltaic module, comprising:
the heat conduction layer is in a net shape and comprises a framework part and a hollowed-out part surrounded by the framework part.
(22) The back sheet of item (21), further comprising:
a subsequent layer; and
at least one of an insulating barrier layer, a fluorine-containing weather-resistant layer and a transitional bonding layer,
the thermally conductive layer is adjacent to at least one of the adhesive layers.
(23) The backsheet of item (22), wherein the adhesive layer extends into the hollowed-out portion of the thermally conductive layer.
(24) A photovoltaic module, comprising:
a battery layer including a plurality of battery cells arranged in an array; and
the back sheet according to any one of items (21) to (23), the battery layer being bonded to the back sheet by a first adhesive layer.
(25) A method of manufacturing a photovoltaic module, comprising:
providing a first backboard;
laminating a heat conducting layer on the first backboard, wherein the heat conducting layer is net-shaped and comprises a framework part and a hollowed-out part surrounded by the framework part; and
and stacking a battery layer comprising a plurality of battery cells on the heat conducting layer, wherein the plurality of battery cells are arranged in an array form, so that at least a part of the framework part overlaps with gaps between adjacent battery cells in the thickness direction of the photovoltaic module, and the hollowed-out part overlaps with the battery cells.
(26) A method of manufacturing a photovoltaic module, comprising:
providing a first backboard;
laminating a battery layer on a first side of the first back plate, wherein the battery layer comprises a plurality of battery cells, and the battery cells are arranged in an array form; and
a heat conductive layer is laminated on a second side of the first back sheet opposite to the first side, the heat conductive layer is in a mesh shape, which includes a skeleton portion and a hollowed portion surrounded by the skeleton portion, and the lamination is such that at least a part of the skeleton portion overlaps with a gap between adjacent battery cells in a thickness direction of the photovoltaic module, the hollowed portion overlaps with the battery cells.
(27) A method of manufacturing a photovoltaic module, comprising:
providing a back sheet according to any one of items (21) to (23); and
and stacking a battery layer on the adhesive layer of the first back plate, wherein the battery layer comprises a plurality of battery units, the battery units are arranged in an array mode, the stacking is performed in the thickness direction of the photovoltaic module, at least one part of the framework part is overlapped with gaps between adjacent battery units, and the hollowed-out part is overlapped with the battery units.
The scope of the present disclosure is defined not by the above-described embodiments but by the appended claims and their equivalents.

Claims (26)

1. A photovoltaic module, comprising:
a battery layer comprising a plurality of battery cells arranged in an array and configured to receive light and generate power; and
a thermally conductive layer formed of or comprising a thermally conductive material and in thermal communication with the battery layer to diffuse heat from a high temperature region to a low temperature region; and
a first back plate, the heat conduction layer being interposed between the first back plate and the battery layer,
the heat conduction layer is in a net shape and comprises a framework part and a hollowed-out part surrounded by the framework part, and in the thickness direction of the photovoltaic module, at least one part of the framework part is overlapped with a gap between adjacent battery units, and the hollowed-out part is overlapped with the battery units.
2. A photovoltaic module, comprising:
a battery layer comprising a plurality of battery cells arranged in an array and configured to receive light and generate power; and
a thermally conductive layer formed of or comprising a thermally conductive material and in thermal communication with the battery layer to diffuse heat from a high temperature region to a low temperature region;
a first back plate, the heat conduction layer is arranged on one side of the first back plate, which is away from the battery layer,
the heat conduction layer is in a net shape and comprises a framework part and a hollowed-out part surrounded by the framework part, and in the thickness direction of the photovoltaic module, at least one part of the framework part is overlapped with a gap between adjacent battery units, and the hollowed-out part is overlapped with the battery units.
3. The photovoltaic assembly of claim 1 or 2, further comprising a thermally conductive layer adhesive layer disposed between the first backsheet and the thermally conductive layer to adhere the thermally conductive layer to the first backsheet.
4. The photovoltaic assembly of claim 1 or 2, further comprising a first adhesive layer disposed between the first backsheet and the cell layer to adhere the cell layer to the first backsheet.
5. The photovoltaic module according to claim 1 or 2, wherein
The skeletal portion of the thermally conductive layer is configured to reflect light.
6. The photovoltaic module according to claim 1 or 2, wherein
The skeleton part of the heat conducting layer is aluminum foil or copper foil.
7. The photovoltaic module according to claim 1 or 2, wherein
The skeletal portion of the thermally conductive layer is plated with tin or nickel.
8. The photovoltaic module according to claim 1 or 2, wherein
The surface of the skeleton portion of the heat conduction layer facing the battery layer is toothed.
9. The photovoltaic module according to claim 1 or 2, wherein
In the thickness direction, the at least a part of the skeleton portion overlaps with an edge of the battery cell.
10. The photovoltaic module according to claim 1 or 2, wherein,
the skeletal section includes a plurality of first strip-shaped heat conducting sections extending in a first direction and a plurality of second strip-shaped heat conducting sections extending in a second direction intersecting the first direction.
11. The photovoltaic module of claim 10, wherein,
the first direction is perpendicular to the second direction.
12. The photovoltaic assembly of claim 10, wherein the first and second thermally conductive strip portions have the same width.
13. The photovoltaic module according to claim 1 or 2, wherein,
the thermally conductive layer may be formed by stamping a sheet material.
14. The photovoltaic module according to claim 1 or 2, wherein,
the heat conduction layer is in a grid-shaped net pattern, the framework part comprises a plurality of sub-strip-shaped heat conduction parts overlapped with the battery units, and the sub-strip-shaped heat conduction parts are overlapped with the main grids of the battery units.
15. The photovoltaic assembly of claim 2, further comprising:
and the protective layer is arranged on one side of the heat conduction layer, which is away from the first backboard.
16. The photovoltaic module according to claim 1 or 2, further comprising:
the second backboard is arranged on one side, away from the first backboard, of the battery layer, and the battery layer is clamped between the first backboard and the second backboard.
17. The photovoltaic assembly of claim 1, further comprising:
the heat conductive layer is bonded to the first back plate by at least one of screen printing, coating, spraying, sintering.
18. The assembly of claim 1 or 2, wherein,
the first backsheet includes a glass layer.
19. The photovoltaic module according to claim 1 or 2, wherein,
the first backsheet includes at least one of an insulating barrier layer, a fluorine-containing weatherable layer, an adhesive layer, and a transitional bonding layer.
20. A backsheet for a photovoltaic module, comprising:
the heat conduction layer is in a net shape and comprises a framework part and a hollowed-out part surrounded by the framework part, and the heat conduction layer is used for diffusing heat from a high-temperature area to a low-temperature area.
21. The back plate of claim 20, further comprising:
a subsequent layer; and
at least one of an insulating barrier layer, a fluorine-containing weather-resistant layer and a transitional bonding layer,
the thermally conductive layer is adjacent to at least one of the adhesive layers.
22. The backsheet of claim 21, wherein the adhesive layer extends into the hollowed-out portion of the thermally conductive layer.
23. A photovoltaic module, comprising:
a battery layer including a plurality of battery cells arranged in an array; and
the backsheet of any one of claims 20 to 22, the battery layer being bonded to the backsheet by a first adhesive layer.
24. A method of manufacturing a photovoltaic module, comprising:
providing a first backboard;
laminating a heat conducting layer on the first backboard, wherein the heat conducting layer is net-shaped and comprises a framework part and a hollowed-out part surrounded by the framework part, and the heat conducting layer is used for diffusing heat from a high-temperature area to a low-temperature area; and
And stacking a battery layer comprising a plurality of battery cells on the heat conducting layer, wherein the plurality of battery cells are arranged in an array form, so that at least a part of the framework part overlaps with gaps between adjacent battery cells in the thickness direction of the photovoltaic module, and the hollowed-out part overlaps with the battery cells.
25. A method of manufacturing a photovoltaic module, comprising:
providing a first backboard;
laminating a battery layer on a first side of the first back plate, wherein the battery layer comprises a plurality of battery cells, and the battery cells are arranged in an array form; and
laminating a heat conductive layer on a second side of the first back sheet opposite to the first side, the heat conductive layer being in a mesh shape including a skeleton portion and a hollowed-out portion surrounded by the skeleton portion, and the lamination being such that at least a part of the skeleton portion overlaps with a gap between adjacent battery cells in a thickness direction of the photovoltaic module, the hollowed-out portion overlaps with the battery cells, wherein the heat conductive layer is for diffusing heat from a high temperature region to a low temperature region.
26. A method of manufacturing a photovoltaic module, comprising:
providing a back plate according to any one of claims 20 to 22; and
And stacking a battery layer on the adhesive layer of the back plate, wherein the battery layer comprises a plurality of battery units, the battery units are arranged in an array mode, the stacking is performed in such a way that at least one part of the framework part is overlapped with gaps between adjacent battery units in the thickness direction of the photovoltaic module, and the hollowed-out part is overlapped with the battery units.
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US17/614,310 US20220320356A1 (en) 2020-07-22 2020-08-28 Photovoltaic module, back sheet of photovoltaic module and manufacturing method of photovoltaic module
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Publication number Priority date Publication date Assignee Title
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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102569454A (en) * 2010-12-31 2012-07-11 阿特斯(中国)投资有限公司 Backplane material, photovoltaic module using backplane material and manufacture method of photovoltaic module
CN202888215U (en) * 2012-11-01 2013-04-17 乐凯胶片股份有限公司 Radiating solar battery back film
CN106531832A (en) * 2016-12-22 2017-03-22 苏州高德辰光电科技有限公司 Backing plate applied to photovoltaic battery module and photovoltaic battery module
CN106935674A (en) * 2017-04-21 2017-07-07 江苏天雄电气自动化有限公司 A kind of SiGeSn solar cell photovoltaics component
CN207183291U (en) * 2017-09-01 2018-04-03 上海海优威新材料股份有限公司 Two-side transparent photovoltaic module structure with reflection bar
CN110634976A (en) * 2018-05-31 2019-12-31 上海海优威新材料股份有限公司 Transparent easy-bonding polycarbonate solar cell backboard with grid structure
CN211743167U (en) * 2020-03-17 2020-10-23 江苏荣马新能源有限公司 Solar cell with good weather resistance

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102569454A (en) * 2010-12-31 2012-07-11 阿特斯(中国)投资有限公司 Backplane material, photovoltaic module using backplane material and manufacture method of photovoltaic module
CN202888215U (en) * 2012-11-01 2013-04-17 乐凯胶片股份有限公司 Radiating solar battery back film
CN106531832A (en) * 2016-12-22 2017-03-22 苏州高德辰光电科技有限公司 Backing plate applied to photovoltaic battery module and photovoltaic battery module
CN106935674A (en) * 2017-04-21 2017-07-07 江苏天雄电气自动化有限公司 A kind of SiGeSn solar cell photovoltaics component
CN207183291U (en) * 2017-09-01 2018-04-03 上海海优威新材料股份有限公司 Two-side transparent photovoltaic module structure with reflection bar
CN110634976A (en) * 2018-05-31 2019-12-31 上海海优威新材料股份有限公司 Transparent easy-bonding polycarbonate solar cell backboard with grid structure
CN211743167U (en) * 2020-03-17 2020-10-23 江苏荣马新能源有限公司 Solar cell with good weather resistance

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