WO2023179646A1 - Module photovoltaïque, système photovoltaïque et procédé de fabrication de module photovoltaïque - Google Patents

Module photovoltaïque, système photovoltaïque et procédé de fabrication de module photovoltaïque Download PDF

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Publication number
WO2023179646A1
WO2023179646A1 PCT/CN2023/083002 CN2023083002W WO2023179646A1 WO 2023179646 A1 WO2023179646 A1 WO 2023179646A1 CN 2023083002 W CN2023083002 W CN 2023083002W WO 2023179646 A1 WO2023179646 A1 WO 2023179646A1
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WO
WIPO (PCT)
Prior art keywords
battery
edge
photovoltaic module
battery sheet
sheet
Prior art date
Application number
PCT/CN2023/083002
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English (en)
Chinese (zh)
Inventor
陈登运
孙俊
周华明
石刚
Original Assignee
通威太阳能（合肥）有限公司
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Publication of WO2023179646A1 publication Critical patent/WO2023179646A1/fr

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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
    • H01L31/05—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
    • H01L31/0504—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module
    • 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
    • H01L31/04—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
    • H01L31/18—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
    • 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

Definitions

  • the present application relates to the field of solar photovoltaic module packaging technology, and in particular to a photovoltaic module, a photovoltaic system and a manufacturing method of photovoltaic modules.
  • this application attempts to optimize the interconnection method of photovoltaic modules, further increase the proportion of cells, and improve the efficiency of photovoltaic modules.
  • a photovoltaic module a photovoltaic system, and a manufacturing method of the photovoltaic module are provided.
  • a photovoltaic component including at least two adjacently arranged battery sheets and a plurality of welding strips; the battery sheets have a first edge structure and a second edge structure, the second edge structure has a wavy structure, and the The wavy structure has multiple trough substructures and multiple crest substructures;
  • the welding strip is connected between any two adjacent battery sheets, and the wave peak substructure of any battery sheet at least overlaps with the first edge structure of the adjacent battery sheet. .
  • a gap is formed between the valley substructure of any battery sheet and the first edge structure of the adjacent battery sheet;
  • the welding strip is used to pass through the gap to connect two adjacent battery sheets.
  • the battery sheet also has a plurality of auxiliary grid lines, the extending direction of the auxiliary grid lines is parallel to the first edge structure, and the auxiliary grid lines are used to collect current on the battery sheet. .
  • the second edge structure of each battery sheet also has a linear structure connected to the wavy structure.
  • the wavy structure is a sinusoidal curve.
  • a groove is provided in the linear structure, and the welding strip is used to pass through the groove to connect two adjacent battery sheets.
  • a first U-shaped structure is provided at the valley substructure and the groove of each battery piece, and each of the first U-shaped structures is connected to at least one of the auxiliary grid lines. connection, the first U-shaped structure is used to collect current on the connected auxiliary grid lines.
  • the first edge structure of each battery piece also has a second U-shaped structure opposite to the first U-shaped structure, and the second U-shaped structure is connected with at least one of the The auxiliary gate lines are connected, and the second U-shaped structure is used to collect current on the connected auxiliary gate lines.
  • the battery sheet further includes a plurality of main grid lines, and both ends of each main grid line are respectively connected to the first U-shaped structure and the second U-shaped structure.
  • the gate line is used to collect current on the secondary gate line.
  • the battery sheet further includes a plurality of metal welding points, each of which is located on each of the first U-shaped structure and the second U-shaped structure, for fixed connection.
  • the auxiliary grid line is located on each of the first U-shaped structure and the second U-shaped structure, for fixed connection.
  • each main grid line includes a plurality of metal welding points, and the metal welding points on each main grid line are spacedly distributed on the connected main grid lines.
  • each of the auxiliary grid lines includes a plurality of metal welding points, and each of the metal welding points is spacedly distributed on the connected auxiliary grid lines.
  • a photovoltaic system includes the above photovoltaic component.
  • a method for manufacturing photovoltaic modules including:
  • the silicon wafers having a first edge structure and a second edge structure
  • any soldering ribbon to connect any two adjacent battery sheets to obtain a photovoltaic module.
  • the wave peak substructure of any battery sheet intersects with the first edge structure of the adjacent battery sheet at least. Stack settings.
  • a method for manufacturing photovoltaic modules including:
  • the half-cell cells Obtaining at least two half-cell cells arranged adjacently, the half-cell cells having a first edge structure and a second edge structure;
  • the wavy structure has a plurality of trough substructures and a plurality of crest substructures, to obtain a plurality of battery sheets;
  • any soldering ribbon to connect any two adjacent battery sheets to obtain a photovoltaic module.
  • the wave peak substructure of any battery sheet intersects with the first edge structure of the adjacent battery sheet at least. Stack settings.
  • a photovoltaic component including at least two battery sheets and a plurality of welding strips, each of the battery sheets includes opposite front and back sides;
  • the battery sheets include:
  • a plurality of auxiliary grid lines are respectively provided on the battery sheet, the extending direction of the auxiliary grid lines is parallel to the first edge, and the auxiliary grid lines are used to collect current on the battery sheet;
  • the reverse side of the first battery sheet is used to provide a plurality of the auxiliary grid lines, and the front side of the second battery sheet is used to provide a plurality of the auxiliary grid lines;
  • the first end of the welding ribbon is disposed on the reverse side of the first battery sheet, the second end of the welding ribbon is disposed on the front side of the second battery sheet, and the wave crest of the first battery sheet is in contact with the second battery sheet.
  • the first edges of the two battery sheets are at least overlapped.
  • Figure 1 is a schematic structural diagram of a battery cell in an embodiment
  • Figure 2 is a partially enlarged schematic diagram of the metal welding point on the first U-shaped structure in Figure 1;
  • Figure 3 is a second structural schematic diagram of a battery cell in an embodiment
  • Figure 4 is a schematic structural diagram of a photovoltaic module in an embodiment
  • Figure 5(a) is one of the partially enlarged schematic diagrams of the photovoltaic module shown in Figure 4;
  • Figure 5(b) is the second partial enlarged schematic diagram of the photovoltaic module shown in Figure 4;
  • Figure 5(c) is the third partial enlarged schematic diagram of the photovoltaic module shown in Figure 4.
  • Figure 6 is a schematic cross-sectional view of photovoltaic module connections in an embodiment
  • Figure 7 is a third schematic structural diagram of a battery cell in an embodiment
  • Figure 8 is a fourth schematic structural diagram of a battery cell in an embodiment
  • Figure 9 is a schematic flow diagram of a manufacturing method of a photovoltaic module in an embodiment
  • FIG. 10 is a second schematic flow diagram of a manufacturing method of a photovoltaic module in an embodiment.
  • FIG. 1 a schematic diagram of a battery sheet 100 is provided.
  • the battery sheet 100 includes a first edge structure and a second edge structure.
  • the second edge structure has a wavy structure, and the wavy structure has Multiple trough substructures and multiple crest substructures.
  • the wavy structure can be understood as a wave-like structure.
  • the second edge structure of the battery sheet 100 in the figure is a wavy structure, and the wavy structure can be a periodically changing curve. It can also be a non-periodic changing curve. If it is a periodic curve, the line segment of a periodic curve can only include one amplitude or two amplitudes, that is, the peak substructure of the periodic curve.
  • the absolute values of the coordinate positions of the highest point and the lowest point of the trough substructure may be the same or different. In this way, a wavy curve-like structure is formed on the second edge structure of the battery sheet 100, and the wavy structure includes a plurality of trough substructures and a plurality of crest substructures.
  • the wavy structure may be sinusoidal.
  • the sinusoidal curve has a continuous smooth curve segment, and the distance between the highest point of the crest substructure and the lowest point of the trough substructure relative to the symmetrical line segment in the middle is equal.
  • the sinusoidal wave peak substructure forms a good spacing with the edge structure of another cell piece 100, which increases the cell density of the photovoltaic module and reduces the window rate of the photovoltaic module.
  • the first edge structure of the battery sheet 100 can be a straight line as shown in Figure 1, or it can also be a wavy curve structure with multiple peak substructures and trough substructures; and the first edge
  • the crest substructure of the structure and the crest substructure of the second edge structure are relatively staggered, that is, the trough substructure of the first edge structure corresponds to the crest substructure of the second edge structure, and the crest substructure of the first edge structure corresponds to the crest substructure of the second edge structure.
  • the valley substructure of the second edge structure is relatively staggered, that is, the trough substructure of the first edge structure corresponds to the crest substructure of the second edge structure, and the crest substructure of the first edge structure corresponds to the crest substructure of the second edge structure.
  • one of the edge structures of the cell sheet is set into a wavy structure, so that when forming the photovoltaic module, the wave peak substructure of the wavy structure overlaps with another cell sheet. This in turn increases the density of photovoltaic modules and improves efficiency.
  • the above-mentioned battery sheet 100 also has a plurality of auxiliary grid lines 110 .
  • the extending direction of the auxiliary grid lines 110 is parallel to the first edge structure.
  • the auxiliary grid lines 110 are used to collect the surface of the battery sheet 100 . of current.
  • the auxiliary grid lines 110 are parallel to the first edge structure, as shown in FIG. 1 .
  • the extension direction of the sub-grid line 110 is parallel to the central axis of the first edge structure to collect current on the battery sheet 100 .
  • the above-mentioned photovoltaic module 100 further includes a plurality of U-shaped structure pairs, each U-shaped structure pair includes two U-shaped structures respectively, and one U-shaped structure in the same U-shaped structure pair is disposed on the second edge. At the wave trough, another U-shaped structure is provided at a position opposite to the first edge. Each U-shaped structure is connected to at least one auxiliary grid line, and the U-shaped structure is used to collect current on the connected auxiliary grid lines.
  • a first U-shaped structure 121 is also provided at the valley substructure of the battery sheet 100 . Each first U-shaped structure 121 is connected to at least one auxiliary grid line 110 . connection, the first U-shaped structure 121 is used to collect current on the connected auxiliary gate lines 110 .
  • the first U-shaped structure 121 can also be called a harpoon-shaped structure in this field.
  • the first U-shaped structure 121 is shaped like the U in the letter. Please refer to the schematic diagram in Figure 1.
  • Each first U-shaped structure 121 The two edge structures are respectively connected to at least one auxiliary gate line, and the first U-shaped structure 121 is used to collect current on the auxiliary gate lines connected to it.
  • the first edge structure of the cell sheet also has a second U-shaped structure 122 arranged opposite to the first U-shaped structure 121.
  • the second U-shaped structure 122 is connected to at least one auxiliary grid line.
  • the openings of the first U-shaped structure 121 and the second U-shaped structure 122 are arranged opposite to each other, and the second U-shaped structure 122 is used to collect current on the connected auxiliary grid lines.
  • the first U-shaped structures 121 in this application can be arranged in pairs. If the second edge structure in this application is provided with the first U-shaped structure 121, correspondingly, the first edge structure and the first U-shaped structure 121 are arranged in pairs.
  • a second U-shaped structure 122 is also provided at a position opposite to the first U-shaped structure 121.
  • the battery sheet 100 further includes a plurality of metal Welding points 130, each metal welding point 130 is located on each first U-shaped structure 121.
  • each metal welding point 130 is located on each first U-shaped structure 121.
  • Figure 2 a partial enlarged schematic diagram of the metal welding points on the first U-shaped structure 121 in Figure 1, each metal welding point is Point 130 is used to make an electrically conductive connection.
  • the plurality of auxiliary grid lines 110 of the battery piece 100 in this embodiment also includes a plurality of metal welding points 130 respectively. Each metal welding point 130 is distributed at intervals on the connected auxiliary grid lines 110 .
  • a battery sheet 100 is provided.
  • the battery sheet 100 further includes a plurality of main grid lines 140 , and both ends of each main grid line 140 are connected to each first U-shaped structure. 121 is connected to the second U-shaped structure 122, and the main grid line 140 is used to collect the current on the auxiliary grid line 110.
  • each main grid line 140 in this embodiment includes a plurality of metal welding points 130 , and the metal welding points 130 on each main grid line 140 are spacedly distributed on the connected main grid lines 140 .
  • the distribution of the metal welding points 130 on the main grid line 140 may be located only on the connected main grid line 140 , or may be located on the connection point between the main grid line 140 and the auxiliary grid line 110 .
  • the metal welding point 130 of the present application is mainly used for conductive connection to realize the conduction of current on the battery sheet 100. Therefore, the position of the metal welding point 130 is not limited here. Technicians can set the position of the metal welding point 130 according to actual needs.
  • main grid line 140 in this embodiment is arranged perpendicular to the above-mentioned auxiliary grid line 110, and the two end points of the main grid line 140 are connected to the metal welding points 130 provided on the above-mentioned first U-shaped structure 121. to conduct current.
  • the same auxiliary grid line 110 , the first U-shaped structure 121 and the second U-shaped structure 122 are provided on both the front and back sides of the cell 100 , and the pair of auxiliary grid lines 110 and the first U-shaped structure 122
  • the connection relationship between 121 and the second U-shaped structure 122 is as defined above. That is, by flipping the battery sheet 100 horizontally in FIG. 1 , the same structural schematic diagram of the battery sheet 100 can be obtained.
  • the same auxiliary grid line 110, the first U-shaped structure 121, the second U-shaped structure 122 and the main grid line 140 are provided on both the front and back sides of the cell sheet 100, and the auxiliary grid lines 110,
  • the connection relationship between the first U-shaped structure 121, the second U-shaped structure 122 and the main gate line 140 is as defined above. That is, by flipping the battery sheet 100 horizontally in FIG. 3 , the same structural schematic diagram of the battery sheet 100 can be obtained.
  • FIG. 4 a schematic diagram of a photovoltaic module 200 is provided.
  • the photovoltaic module 200 in the drawings of this application includes two cells, namely the first cell 101 and the second cell 102. It can be understood that the photovoltaic module 200 described in this application does not It must only include two cells, it can be three, it can be four, or it can be any other number. That is, in this embodiment, the photovoltaic module 200 includes at least two adjacently arranged battery sheets and a plurality of welding strips 150.
  • the battery sheets have a first edge structure and a second edge structure, and the second edge structure has a wavy structure, and the waves are
  • the shape structure has multiple trough substructures and multiple crest substructures; the solder ribbon 150 is connected between any two adjacent battery sheets, and the crest substructure of any battery sheet is connected to the first edge structure of the adjacent battery sheet. At least overlap settings.
  • the first end of the welding ribbon 150 is connected to the reverse side of the first battery piece 101
  • the second end of the welding ribbon 150 is connected to the front side of the second battery piece 102
  • the wave crest substructure of the first battery piece 101 is connected to The first edge structures of the second battery sheet 102 are at least overlapped.
  • the first battery sheet 101 and the second battery sheet 102 in this embodiment are consistent with the battery sheet 100 in the above-mentioned embodiment, and may also include auxiliary grid lines 110 extending in a direction parallel to the first edge structure; they may also include The first U-shaped structure 121 is disposed at the valley substructure of the second edge structure of the battery piece 100, and when the first U-shaped structure 121 is included, the first end of the welding ribbon 150 is opposite to the first U-shaped structure of the battery piece 101 Connection; it may also include a second U-shaped structure 122 disposed at the first edge structure of the battery piece 100 and opposite to the first U-shaped structure 121.
  • the two ends are connected to the second U-shaped structure 122 on the front side of the adjacent cell piece 102 to realize the connection of the photovoltaic module 200 .
  • the battery sheet 100 in this embodiment includes two sides, one of which is the front side, and the opposite side to the front side is the back side. Please refer to Figure 1.
  • the battery cell 100 in Figure 1 can be either a back schematic view of the first cell chip 101 in this embodiment, or a front schematic view of the second cell chip 102 in this embodiment. It only needs to be turned horizontally for observation. .
  • the first battery sheet 101 and the second battery sheet 102 are combined.
  • the front surface of the first battery sheet 101 and the front surface of the second battery sheet 102 are located on the same plane. That is, the front surface of the first battery sheet 101 is located on the same plane. Different planes.
  • the second edge structure and the second battery of the first battery piece 101 The first edge structures of the cell sheets 102 are arranged adjacently, and the second edge structures of the first battery sheet 101 and the first edge structures of the second battery sheet 102 are at least overlapped.
  • FIG. 5(a) is an enlarged partial schematic diagram of the photovoltaic module 200 .
  • the wave peak substructure of the second edge structure of the first battery sheet 101 is overlapped with the first edge structure of the second battery sheet 102 to achieve a negative spacing distance, that is, they overlap each other; at the same time, at least they are overlapped It can also be that the wave peak substructure of the second edge structure of the first cell sheet 101 offsets the first edge structure of the second cell sheet 102 to achieve zero spacing distance, that is, zero gap.
  • Figure 5(b) for a photovoltaic module.
  • the peak substructure of the second edge structure of the first cell piece 101 is slightly spaced from the first edge structure of the second cell piece 102 to achieve a small distance, that is, a positive gap, please refer to 5(c) is the third partially enlarged schematic diagram of the photovoltaic module 200.
  • the first end of the soldering ribbon 150 is connected to the first U-shaped structure 121 disposed on the second edge structure of the first battery sheet 101 on the opposite side of the first battery sheet 101, and the second end of the soldering ribbon 150 Then it is connected to the first U-shaped structure 121 provided on the first edge structure of the first battery sheet 101 on another plane, thereby connecting the first battery sheet 101 and the second battery sheet 102.
  • Figure 6 is a schematic cross-sectional view of the photovoltaic module 100 connection.
  • the battery piece 102 is connected.
  • the process window for small-pitch cells is increased, defects during series welding are reduced, the cell proportion of the photovoltaic module is increased, and the Overall component efficiency.
  • the welding strip 150 can be a flat welding strip, or a combination of a flat welding strip and a round welding strip, where the flat welding strip is used to connect the reverse side of the first battery piece 101 and the round welding strip is used to connect the back side of the second battery piece 102 just surface; it can also be shaped into a round welding strip, that is, the middle part of the round welding strip is used to cross between the back side of the first cell piece 101 and the front side of the second cell piece 102, which is a flat type; it can also be a flat shape.
  • Welding strip is a segmented combination of welding strip and round welding strip.
  • the soldering tape 150 includes copper foil, copper tape, tinned soldering tape, conductive tape, and conductive wire.
  • Suitable alloy materials for welding can be used during welding.
  • a battery manufactured by a low-temperature process such as a heterojunction battery (HIT)
  • a low-melting point alloy material can be used for welding
  • a high-melting point alloy material can be used for welding
  • the welding ribbon 150 is connected to the battery.
  • Composite can use welding (high and low temperature), adhesive, tape, modified film, etc.
  • the photovoltaic module 200 in this embodiment includes multiple battery slices 100
  • the first end of the welding ribbon 150 and the first battery slice 100 The back side is connected, and the second end of the welding ribbon 150 is connected to the front side of the second battery piece 100.
  • the first battery piece 100 corresponds to the above-mentioned first battery piece 101
  • the second battery piece corresponds to the above-mentioned second battery piece.
  • the photovoltaic module 200 composed of three battery sheets 100 includes a third battery sheet.
  • the above-mentioned second battery sheet 100 is used as the first battery sheet 101, and the third battery sheet is 100 serves as the second cell piece 102, and the welding ribbon 150 repeats the above connection relationship to complete the connection of the photovoltaic module 200.
  • I won’t go into details here. It can be understood that those skilled in the art can assemble the photovoltaic module 200 with more than three cells 100 according to the above content. All fall within the protection scope of this application.
  • This embodiment implements the connection of high-density photovoltaic modules by arranging cell sheets 100 with a wavy structure, and arranging the wave peak substructure of one cell sheet 100 to overlap with another cell sheet 100, thereby increasing the efficiency of the cells.
  • the cell sheet 100 in the photovoltaic module 200 in the above embodiment also includes a plurality of metal welding points 130, and each metal welding point 130 is located at each of the first U-shaped structure 121 and the second U-shaped structure.
  • the auxiliary grid line 110 is used for fixed connection.
  • the metal welding points 130 provided on the first U-shaped structure 121 can also be used to fix the auxiliary grid lines 110 connected to the first U-shaped structure 121 .
  • the metal welding point 130 is also used to fix the soldering strip 150 .
  • the plurality of auxiliary grid lines 110 of the battery piece 100 in this embodiment also include a plurality of metal welding points 130 respectively. Each metal welding point is distributed at 130 intervals in the connected connected to the auxiliary gate line 110 for conductive connection.
  • the cell 100 in the photovoltaic module 200 in the above embodiment also includes a plurality of main grid lines 140, and both ends of each main grid line 140 are respectively connected to the first U-shaped structure pair 121 and the second U-shaped structure pair 121.
  • the U-shaped structure 122 is connected, and the main grid line 140 is used to collect the current on the auxiliary grid line 110 .
  • each main grid line 140 in this embodiment includes a plurality of metal welding points 130 .
  • the battery sheet 100 in this embodiment is consistent with the battery sheet 100 in the above-mentioned embodiment. Please refer to the description in the above-mentioned embodiment for specific limitations, which will not be described again here.
  • FIG. 7 a schematic structural diagram of a cell sheet 100 is provided.
  • the second edge structure in the cell sheet 100 in the above-mentioned photovoltaic module 200 also has a straight line structure connected to the wavy structure; the straight line At least one first U-shaped structure 121 is provided at the structure.
  • the linear structure in this embodiment can be located at any position on the second edge structure of the battery sheet 100, and can be at both ends of the wavy structure, or in the middle of the wavy structure, and at least one linear structure is also provided.
  • the first U-shaped structure 121 is used to be connected in series to the second U-shaped structure 122 of the first edge structure on another battery to achieve connection of high-efficiency components.
  • FIG. 8 a schematic structural diagram of a battery sheet 100 is provided.
  • a groove is provided in the linear structure, and a first U-shaped structure 121 is provided at the groove.
  • the welding strip 150 is used to pass through the groove to connect the first battery piece 101 and the second battery piece 102.
  • the linear groove of the second edge structure of the first battery sheet 101 and the first edge structure of the second battery sheet 102 will form a gap, as in the above embodiment.
  • the soldering ribbon 150 can pass through the gap to connect the two cells 100 in series, increasing the proportion of the cells 100 in the photovoltaic module and improving efficiency.
  • the groove in this embodiment can be obtained by drilling. Therefore, the specific shape of the groove is not limited here, as long as the linear edge structure can form a perforation with the edge structure of another cell sheet 100 .
  • the grooves in Figure 8 of this application are only used for schematic description.
  • a photovoltaic system including the photovoltaic component 200 as described above.
  • the photovoltaic system in this embodiment includes the above-mentioned high-density photovoltaic modules, making full use of the sun's
  • the electrical energy that can be converted achieves the purpose of energy conservation and environmental protection.
  • a method for manufacturing a photovoltaic module including steps S110 to S140.
  • Step S110 Obtain at least two adjacent silicon wafers.
  • the silicon wafers have a first edge structure and a second edge structure.
  • Step S120 Cut the second edge structure of the silicon wafer into a wavy structure, and the wavy structure has multiple trough substructures and multiple crest substructures to obtain multiple battery sheets.
  • step S130 any two adjacent cell sheets are connected with a welding ribbon to obtain a photovoltaic module.
  • the wave peak substructure of any cell sheet at least overlaps with the first edge structure of the adjacent cell sheet.
  • the battery sheets and photovoltaic components in this embodiment are consistent with those in the above-mentioned embodiments. Please refer to the limitations on the battery sheets and then the photovoltaic components in the above-mentioned embodiments, which will not be described again here.
  • the cells are prefabricated by silicon wafers, and the wavy structure and secondary grid lines are set in the cells, and the two cells are connected through soldering ribbons to achieve the manufacturing of high-density components, and the cells can all be set It can be in the form of large or small chamfered pieces, small chamfered pieces, square pieces, rectangular pieces, quasi-square pieces, quasi-rectangular pieces, etc., which are not limited here.
  • a method for manufacturing a photovoltaic module including steps S210 to S230.
  • Step S210 Obtain at least two adjacent half-cell batteries, and the half-cell batteries have a first edge structure and a second edge structure.
  • Step S220 Cut the second edge structure of the half-cell battery into a wavy structure.
  • the wavy structure has multiple trough substructures and multiple crest substructures to obtain multiple battery sheets.
  • Step S230 Connect any two adjacent cell sheets with a solder ribbon to obtain a photovoltaic module.
  • the wave peak substructure of any cell sheet at least overlaps with the first edge structure of the adjacent cell sheet.
  • the battery sheets and photovoltaic components in this embodiment are consistent with those in the above-mentioned embodiments. Please refer to the limitations on the battery sheets and then the photovoltaic components in the above-mentioned embodiments, which will not be described again here.
  • a half-cell cell is obtained by cutting the entire cell. One edge structure of the half-cell cell is set to a wavy structure, and the two cell cells are connected through a welding ribbon to realize the manufacturing of high-density components.
  • a method for manufacturing a photovoltaic component including the steps S310 ⁇ S340.
  • Step S310 Obtain at least two silicon wafers.
  • the silicon wafers have first and second edges that are parallel to each other and opposite front and back surfaces.
  • Step S320 Cut the second edge of the silicon wafer into a wavy structure, and the wavy structure has multiple troughs and multiple crests.
  • Step S330 set a plurality of sub-grid lines on the back side of the first silicon wafer, and set a plurality of sub-grid lines on the front side of the second silicon wafer to respectively obtain the first cell piece and the second cell piece, wherein the extension of the sub-grid line The direction is parallel to the first edge, and the secondary grid line is used to collect current on the cell sheet.
  • Step S340 use the first end of the soldering ribbon to connect the back side of the first cell piece, and the second end of the soldering strip to connect the U-shaped structure on the front side of the second cell piece at the first edge to obtain the photovoltaic module and the first cell piece.
  • the crest of the wave at least overlaps with the first edge of the second cell sheet.
  • a method for manufacturing a photovoltaic module including steps S410 to S430.
  • Step S410 Obtain two half-cell batteries.
  • the half-cell batteries have first and second edges that are parallel to each other and opposite front and back surfaces.
  • a plurality of auxiliary grid lines are provided on the back of the first half-cell battery, and the front of the second half-cell battery is
  • a plurality of auxiliary grid lines are provided, wherein the extension direction of the auxiliary grid lines is parallel to the first edge, and the auxiliary grid lines are used to collect current on the battery sheet.
  • Step S420 Cut the second edge of the half-cell battery into a wavy structure with multiple troughs and multiple crests to obtain the first battery sheet and the second battery sheet respectively.
  • Step S430 use the first end of the soldering ribbon to connect the back side of the first battery sheet, and the second end of the soldering ribbon to connect the front side of the second battery sheet to obtain the photovoltaic module. At least one edge should overlap.

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  • Engineering & Computer Science (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Manufacturing & Machinery (AREA)
  • Sustainable Energy (AREA)
  • Photovoltaic Devices (AREA)

Abstract

L'invention concerne un module photovoltaïque, un système photovoltaïque et un procédé de fabrication d'un module photovoltaïque. Le module photovoltaïque (200) comprend au moins deux éléments cellulaires (100) adjacents et une pluralité de bandes de soudage (150), chaque élément cellulaire étant pourvu d'une première structure marginale et d'une seconde structure marginale, la seconde structure marginale se présentant sous la forme d'une structure ondulée, et la structure ondulée étant pourvue d'une pluralité de sous-structures formant cavités et d'une pluralité de sous-structures en saillie ; et les bandes de soudage (150) faisant la liaison entre deux quelconques éléments cellulaires adjacents, et les sous-structures en saillie de l'un quelconque des éléments cellulaires se chevauchant au moins avec la première structure marginale de l'élément cellulaire adjacent.
PCT/CN2023/083002 2022-03-22 2023-03-22 Module photovoltaïque, système photovoltaïque et procédé de fabrication de module photovoltaïque WO2023179646A1 (fr)

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