[go: up one dir, main page]

WO2022033322A1 - 光伏组件 - Google Patents

光伏组件 Download PDF

Info

Publication number
WO2022033322A1
WO2022033322A1 PCT/CN2021/109336 CN2021109336W WO2022033322A1 WO 2022033322 A1 WO2022033322 A1 WO 2022033322A1 CN 2021109336 W CN2021109336 W CN 2021109336W WO 2022033322 A1 WO2022033322 A1 WO 2022033322A1
Authority
WO
WIPO (PCT)
Prior art keywords
photovoltaic module
welding
module according
bonding
members
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2021/109336
Other languages
English (en)
French (fr)
Inventor
邓士锋
许涛
夏正月
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canadian Solar Inc
CSI Cells Co Ltd
Canadian Solar Manufacturing Changshu Inc
Original Assignee
Canadian Solar Inc
CSI Cells Co Ltd
Canadian Solar Manufacturing Changshu Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202021650935.1U external-priority patent/CN212676285U/zh
Priority claimed from CN202010797061.0A external-priority patent/CN114078983B/zh
Application filed by Canadian Solar Inc, CSI Cells Co Ltd, Canadian Solar Manufacturing Changshu Inc filed Critical Canadian Solar Inc
Publication of WO2022033322A1 publication Critical patent/WO2022033322A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
    • H10F19/00—Integrated devices, or assemblies of multiple devices, comprising at least one photovoltaic cell covered by group H10F10/00, e.g. photovoltaic modules
    • H10F19/90—Structures for connecting between photovoltaic cells, e.g. interconnections or insulating spacers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
    • H10F77/00—Constructional details of devices covered by this subclass
    • H10F77/20—Electrodes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy

Definitions

  • the present disclosure relates to the technical field of photovoltaic power generation, and in particular, to a photovoltaic assembly.
  • an object of the present disclosure is to provide a photovoltaic module, which can improve the contact force between the cell and the welding tape, and improve the reliability of the photovoltaic module.
  • a photovoltaic module includes: a plurality of cell sheets, each of which is provided with a plurality of auxiliary grid lines arranged at intervals; a plurality of welding strips, the plurality of the welding strips are arranged along the auxiliary grid lines They are arranged at intervals in the length direction of each of the welding strips, each of the welding strips extends along the arrangement direction of a plurality of the auxiliary grid lines, each of the welding strips is electrically connected to a plurality of the auxiliary grid lines, and each of the welding strips is electrically connected to the plurality of the auxiliary grid lines.
  • the tape is bonded to the battery sheet through a plurality of bonding members, and at least one of the auxiliary grid lines is provided along the length direction of the bonding tape between two adjacent bonding members.
  • each welding strip is electrically connected to a plurality of sub-grid lines, and each welding strip is bonded to the battery sheet through a plurality of adhesive members, and along the length direction of the welding strip, At least one auxiliary grid line is arranged between two adjacent bonding parts, which can increase the contact force between the battery sheet and the welding tape, and at the same time improve the connection reliability between the welding tape and the auxiliary grid line, thereby improving the Reliability of PV modules.
  • the usage of silver paste can be reduced and the cost can be reduced.
  • the shielding of the cells by the busbars can be avoided, and the optical utilization rate of photovoltaic modules can be further improved.
  • each of the bonding members is located between two adjacent sub grid lines.
  • At least one of the adhesive members is located between an edge of the battery sheet and an outermost one of the plurality of sub grid lines.
  • a part of the plurality of bonding members is located between the edge of the battery sheet and one side of all the sub grid lines, and another part of the plurality of bonding members between the edge of the cell and the other side of all the secondary grid lines.
  • a plurality of the bonding members include at least one first bonding member and at least one second bonding member, and the first bonding member is located between an edge of the battery sheet and the plurality of bonding members. Between the outermost one of the sub grid lines, the second adhesive member is located between two adjacent sub grid lines.
  • the width of the bonding member along the length direction of the secondary grid line is less than or equal to the width of the bonding strip.
  • the height of the bonding member is less than or equal to the height of the sub-grid line.
  • the distance between two adjacent adhesive members adjacent to the edge of the battery sheet along the length direction of the welding tape is smaller than the distance between two adjacent bonding members located in the middle of the battery sheet the distance between the adhesives.
  • each of the bonding members is an insulating member, and each of the bonding members is spaced apart from the adjacent sub-grid lines, or each of the bonding members is adjacent to the sub-grid line. of at least one of the secondary gate line contacts.
  • each of the adhesive members is printed on the battery sheet; or each of the adhesive members is coated on the welding tape.
  • each of the adhesives is a resin adhesive.
  • each of the binders includes one of conductive particles and non-conductive particles, and a resin.
  • each of the bonding members includes conductive particles and a resin
  • the conductive particles are at least one of Au, Ag, Cu, and Sn.
  • a plurality of the bonding members are arranged in an array on the battery sheet.
  • the number of the adhesive members is X
  • the number of the adhesive members is Y
  • the X and Y respectively satisfy: 2 ⁇ X ⁇ 130, 5 ⁇ Y ⁇ 30.
  • the solder tape includes a conductive base and a solder layer, the solder layer is wrapped outside the conductive base, and the melting point temperature of the solder layer is T, where T satisfies: 110° C. ⁇ T ⁇ 145°C.
  • the ribbons are circular ribbons, triangular ribbons, rectangular ribbons, or a combination of triangular ribbons and rectangular ribbons.
  • the solder ribbon includes a conductive base and a solder layer, the solder layer is wrapped outside the conductive base, and when the solder ribbon is a circular solder ribbon, the diameter of the solder ribbon is d, the thickness of the solder layer is t, wherein the d and t respectively satisfy: 0.15mm ⁇ d ⁇ 0.35mm, 10 ⁇ m ⁇ t ⁇ 20 ⁇ m.
  • the solder tape includes: a conductive base; a solder layer, the solder layer is wrapped around the conductive base, the solder layer is composed of Sn and Bi; or the solder layer is composed of Sn , Bi and Pb; wherein, the content of Bi is 7.5%-40%, the content of Sn is 35%-65%, and the content of Pb is 10%-40%.
  • the content of Sn is 40%-65%.
  • the content of the Pb is 25%-40%.
  • FIG. 1 is a schematic structural diagram of a battery sheet according to an embodiment of the present disclosure
  • FIG. 2a is a schematic structural diagram of a battery sheet according to an embodiment of the present disclosure
  • FIG. 2b is a schematic structural diagram of a battery sheet according to another embodiment of the present disclosure.
  • 2c is a schematic structural diagram of a battery sheet according to still another embodiment of the present disclosure.
  • FIG. 3 is a schematic structural diagram of a photovoltaic assembly according to an embodiment of the present disclosure.
  • Fig. 4 is a partial cross-sectional view along line A-A in Fig. 3;
  • FIG. 5 is a schematic cross-sectional view of a welding ribbon according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic cross-sectional view of a welding ribbon according to another embodiment of the present disclosure.
  • FIG. 7 is a schematic cross-sectional view of a welding ribbon according to yet another embodiment of the present disclosure.
  • FIG. 8 is a schematic cross-sectional view of a welding ribbon according to yet another embodiment of the present disclosure.
  • the photovoltaic module can be a heterojunction (a special PN junction, which is formed by successively depositing more than two layers of different semiconductor material films on the same base, these materials have different energy band gaps, and these materials can be It is a compound such as gallium arsenide, or a semiconductor alloy such as silicon-germanium) components.
  • a heterojunction a special PN junction, which is formed by successively depositing more than two layers of different semiconductor material films on the same base, these materials have different energy band gaps, and these materials can be It is a compound such as gallium arsenide, or a semiconductor alloy such as silicon-germanium) components.
  • a photovoltaic module includes a plurality of cell sheets 1 and a plurality of welding ribbons 2 .
  • “plurality” means two or more.
  • Each cell 1 is provided with a plurality of auxiliary grid lines 11 arranged at intervals.
  • the cell 1 may be a single crystal cell, the cell 1 is generally rectangular, and the four corners of the cell 1 are arc-shaped.
  • the plurality of sub gate lines 11 may extend in the left-right direction and be arranged at regular intervals in the up-down direction.
  • the plurality of sub grid lines 11 can be parallel to each other and are parallel to two opposite sides of the battery sheet 1 . Therefore, by arranging the above-mentioned plurality of sub-grid lines 11 , the plurality of sub-grid lines 11 can lead out the current generated by the photovoltaic effect of the cell 1 .
  • busbars there is no need to set busbars on the cell 1.
  • the amount of silver paste used can be reduced and the cost can be reduced.
  • the shielding of the cell 1 by the busbars can be avoided, and the optical utilization rate of the photovoltaic module can be improved. .
  • the plurality of solder ribbons 2 are arranged at intervals along the length direction of the sub-grid lines 11 , and each solder ribbon 2 extends along the arrangement direction of the plurality of sub-grid lines 11 .
  • the example of FIG. 3 shows seven welding strips 2 , all of the seven welding strips 2 extend in the up-down direction and are spaced from left to right, and the seven welding strips 2 are parallel to each other and parallel to the other two pairs of the battery sheet 1 .
  • the plurality of solder ribbons 2 are perpendicular to the plurality of auxiliary gate lines 11 .
  • Each of the ribbons 2 is electrically connected to the plurality of sub-grid lines 11 . Thereby, the plurality of welding strips 2 thus arranged can transmit the electric currents guided by the plurality of sub-grid lines 11 .
  • each welding strip 2 is bonded to the battery sheet 1 through a plurality of adhesive members 3, and along the length direction of the welding strip 2, at least one adhesive member 3 is provided between two adjacent adhesive members 3.
  • Auxiliary gate line 11 . Therefore, when a secondary grid line 11 is provided between two adjacent adhesive members 3 along the length direction of the welding tape 2, an adhesive member is provided between every two adjacent secondary grid lines 11 3.
  • the number of adhesive parts 3 is one less than the number of auxiliary grid lines 11, which can effectively ensure the reliable connection between the welding tape 2 and the battery sheet 1;
  • the number of the bonding members 3 is relatively small, so that the shielding of the cell 1 can be reduced and the optical utilization rate of the photovoltaic module can be ensured.
  • the contact force between the cell 1 and the welding strip 2 can be increased, and the connection between the welding strip 2 and the auxiliary grid line 11 can be made more reliable, so that the reliability of the photovoltaic module can be improved. .
  • each welding strip 2 is electrically connected to a plurality of sub-grid lines 11, and each welding strip 2 is bonded to the battery sheet 1 through a plurality of adhesive members 3, and along the welding
  • the connection reliability between the grid lines 11 is improved, thereby improving the reliability of the photovoltaic module.
  • the amount of silver paste used can be reduced and the cost can be reduced.
  • the shielding of the cell 1 by the busbars can be avoided, and the optical utilization of the photovoltaic module can be further improved. Rate.
  • each bonding member 3 is located between two adjacent sub grid lines 11 .
  • the plurality of adhesive members 3 can increase the contact force between the battery sheet 1 and the welding tape 2, and at the same time make the structure of the photovoltaic module simple and convenient for arrangement.
  • At least one adhesive member 3 is located between the edge of the battery sheet 1 and the outermost one of the plurality of sub grid lines 11 .
  • the two edges of the battery sheet 1 that are parallel to the sub grid lines 11 may be the first edge and the second edge, respectively, and the two outermost edges of the plurality of sub grid lines 11 may be respectively The first sub-grid line and the second sub-grid line, the first sub-grid line is arranged adjacent to the first edge, and the second sub-grid line is arranged adjacent to the second edge.
  • Each ribbon 2 can be bonded to the battery sheet 1 by two bonding members 3 .
  • One of the two adhesive members 3 may be located between the first edge and the first sub-grid, and the other of the two adhesive members 3 may be located between the second edge and the second secondary grid. In this way, the shielding area of the adhesive member 3 to the cell sheet 1 is small, thereby ensuring that the photovoltaic module has a high optical utilization rate.
  • a part of the plurality of bonding members 3 is located between the edge of the battery sheet 1 and one side of all the sub grid lines 11 , and some of the plurality of bonding members 3 are located between the edge of the battery sheet 1 and one side of all the sub grid lines 11 The other part is located between the edge of the cell 1 and the other side of all the secondary grid lines 11 .
  • each welding tape 2 can be bonded to the battery sheet 1 by two bonding members 3 .
  • One of the two bonding members 3 is located between the first edge and the first sub-grid, and the other of the two bonding members 3 may be located between the second edge and the second secondary grid.
  • a plurality of adhesive members 3 can be arranged adjacent to the edge of the battery sheet 1 , and the light-shielding area of the adhesive member 3 can be further reduced while ensuring that the welding tape 2 and the battery sheet 1 are firmly connected.
  • the plurality of adhesive members 3 include at least one first adhesive member and at least one second adhesive member.
  • the first adhesive member Located between the edge of the battery sheet 1 and the outermost one of the plurality of sub grid lines 11
  • the second adhesive member is located between two adjacent sub grid lines 11 .
  • the plurality of adhesive members 3 can connect the welding tape 2 and the middle of the battery sheet 1 and the edge of the welding tape 2 and the battery sheet 1, so that the connection between the welding tape 2 and the battery sheet 1 can be more reliable.
  • FIG. 2a and FIG. 2b there are multiple second bonding members, and at least one secondary bonding member is provided along the length direction of the welding tape 2 between two adjacent second bonding members. gate line 11 . Therefore, when a secondary grid line 11 is provided along the length direction of the welding tape 2 between two adjacent second bonding members, a second secondary grid line 11 is provided between every two adjacent secondary grid lines 11 .
  • the number of the second adhesive parts is one less than the number of the auxiliary grid lines 11, which can effectively ensure the reliable connection between the welding tape 2 and the battery sheet 1;
  • the number of the second bonding members is relatively small, so that the shielding of the cell 1 can be reduced and the optical utilization rate of the photovoltaic module can be ensured.
  • the bonding member 3 may include only the first bonding member, only the second bonding member, or both the first bonding member and the second bonding member.
  • the width of the adhesive member 3 along the length direction of the sub grid line 11 may be smaller than or equal to the width of the bonding strip 2 .
  • the light-shielding area of the bonding member 3 can be effectively reduced while ensuring the reliable connection between the welding tape 2 and the battery sheet 1 .
  • the height of the bonding member 3 may be less than or equal to the height of the sub-grid line 11 . In this way, the welding between the welding strip 2 and the auxiliary grid line 11 can be avoided due to the excessive height of the adhesive member 3, thereby ensuring the reliability of welding.
  • the distance between the two adjacent adhesive members 3 adjacent to the edge of the battery sheet 1 along the length direction of the welding tape 2 is smaller than the distance between the two adjacent adhesive members 3 located in the middle of the battery sheet 1 . distance between.
  • the middle of the battery sheet 1 should be understood in a broad sense, and refers to the part close to the middle of the battery sheet 1 relative to the edge of the battery sheet 1, and is not limited to only the center of the battery sheet 1. Therefore, through the above arrangement, the distribution of the adhesive members 3 adjacent to the edge of the battery sheet 1 is relatively dense, and the distribution of the adhesive members 3 located in the middle of the battery sheet 1 is relatively sparse, which ensures the reliability of the welding tape 2 and the battery sheet 1. At the same time of connection, the welding tension between the welding strip 2 and the auxiliary grid line 11 can be effectively improved, so that the photovoltaic module has excellent electrical performance.
  • each bonding member 3 is an insulating member, and each bonding member 3 is spaced apart from the adjacent sub grid lines 11 .
  • the bonding member 3 and the adjacent sub grid lines 11 are arranged at intervals; when the bonding member 3 is the second bonding member, the bonding member 3 is adjacent to The two auxiliary gate lines 11 are arranged at intervals, as shown in FIG. 4 . Therefore, by spacing each of the insulating adhesive members 3 and the adjacent sub grid lines 11 from each other, it can be avoided that the adhesive members 3 cover the sub grid lines 11 and affect the connection between the sub grid lines 11 and the corresponding solder strips 2 . The electrical connection between them can ensure the normal output of the current, so that the photovoltaic module has a higher output power.
  • each bonding member 3 is in contact with at least one adjacent sub-grid line 11 .
  • the bonding member 3 can be conductive
  • the bonding member 3 can be in contact with an adjacent sub grid line 11;
  • the adhesive member 3 may be in contact with at least one of the two adjacent sub gate lines 11 .
  • the adhesive member 3 is electrically connected to both the contacting sub-grid lines 11 and the bonding strips 2 .
  • the current can be transferred from the secondary grid line 11 in contact with the bonding member 3 to the bonding member 3, and finally to the welding tape 2, so as to realize the output of the current.
  • the resistance between the auxiliary grid line 11 and the welding strip 2 can be reduced while ensuring the reliable connection between the welding strip 2 and the battery sheet 1, which is beneficial to the normal output of the current, and the structure is simple and the processing is convenient.
  • the machining accuracy of the adhesive member 3 can be lowered.
  • each adhesive member 3 may be printed on the battery sheet 1 .
  • a plurality of adhesive elements 3 can be printed on the surface of the battery sheet 1 facing the plurality of solder ribbons 2 , and then the solder ribbons 2 and the auxiliary grid lines 11 are welded and bonded to the battery sheet 1 . Therefore, through the above arrangement, while achieving a solid connection between the welding tape 2 and the battery sheet 1, each adhesive member 3 can be accurately printed between two adjacent auxiliary grid lines 11, and the operation is convenient .
  • each adhesive member 3 may also be coated on the welding tape 2 .
  • a firm connection between the welding tape 2 and the battery sheet 1 can also be achieved, and an excessively large printing area of the adhesive member 3 can be avoided, thereby reducing the cost of materials.
  • each bond 3 may be a resin bond.
  • each bonding member 3 may be a polyvinyl acetal member, a polycarbonate member, a nylon member, a polysulfone member, or the like. But not limited to this. In this way, each adhesive member 3 has better heat resistance, which can further ensure the connection reliability between the welding tape 2 and the battery sheet 1 .
  • each bond 3 may include one of conductive particles and non-conductive particles, and resin. That is, each bonding member 3 may include conductive particles and resin, or non-conductive particles and resin.
  • the conductive particles may be at least one of Au, Ag, Cu, and Sn. But not limited to this. Therefore, when each bonding member 3 includes conductive particles and resin, the bonding member 3 has good electrical conductivity, so as to ensure the reliable connection between the welding tape 2 and the battery sheet 1, and at the same time facilitate the photovoltaic module production.
  • a plurality of bonding elements 3 are arranged in an array on the battery sheet 1 .
  • the adhesive member 3 thus provided has a simple structure, is convenient to process, and has a relatively uniform distribution, so that the contact force between the plurality of welding strips 2 and the battery sheet 1 is relatively uniform.
  • the number of the adhesive members 3 is X
  • the number of the adhesive members 3 is Y
  • X and Y are respectively Satisfaction: 2 ⁇ X ⁇ 130, 5 ⁇ Y ⁇ 30.
  • a plurality of solder ribbons 2 are arranged along the length direction of the sub grid lines 11 , and the arrangement direction of the solder ribbons 2 is perpendicular to the length direction of the solder ribbons 2 .
  • the number Y of the adhesive members 3 in the longitudinal direction of the sub-grid line 11 is the number of the solder tapes 2 .
  • the number of adhesive members 3 in the length direction of the auxiliary grid line 11 is too small, that is, the number of welding strips 2 is too small, and the current collected at the auxiliary grid line 11 may not be well transported
  • the number of adhesive members 3 in the length direction of the auxiliary grid line 11 is too large, that is, the number of welding strips 2 is too large, which may block the cell 1 too much, and may The structural strength of the cell 1 will be reduced, and the optical utilization rate and yield of the photovoltaic module will be reduced. Therefore, by making X and Y respectively satisfy: 2 ⁇ X ⁇ 130, 5 ⁇ Y ⁇ 30, while ensuring the firm connection between the welding tape 2 and the battery sheet 1, the number of the bonding element 3 to the battery sheet can be reduced. 1 shielding area, so that the current can be output well, which can improve the yield of photovoltaic modules and facilitate processing.
  • the solder ribbon 2 includes a conductive base 21 and a solder layer 22 , and the solder layer 22 wraps the conductive base 21 .
  • the conductive substrate 21 may be a copper substrate, a copper-aluminum alloy substrate, a copper-silver alloy substrate, or a copper-silver aluminum alloy substrate or the like. But not limited to this.
  • the solder layer 22 may be composed of Sn (tin, a metallic element, a metallic element with silvery white luster) and Bi (bismuth, an element of Group VA No. 83 in the sixth period of the periodic table).
  • Sn has a low melting point, soft texture and ductility, and plays an important role in the welding between the ribbon 2 and the auxiliary grid line 11 .
  • the Bi element can reduce the melting point temperature of the solder layer 22 , thereby reducing the soldering temperature of the solder ribbon 2 , improving the yield of the photovoltaic module, and avoiding the occurrence of virtual soldering. And pollution-free, environmentally friendly.
  • the solder layer 22 may also be composed of Sn, Bi and Pb. Therefore, by adding Pb to the solder layer 22, the surface tension and viscosity of the solder layer 22 can be reduced, so that the solder layer 22 has better wettability and can well absorb the thermal stress generated by the temperature change .
  • the content of Bi is 7.5% to 70%
  • the content of Sn is 35% to 65%
  • the content of Pb is 10% to 40%.
  • the content of Sn can be fixed, and the melting point temperature of the solder layer 22 is different when the content of Bi is different.
  • the content of Bi increases by 1%
  • the content of Pb decreases by 1%
  • the melting point temperature can be reduced by about 2°C.
  • the content of Bi should not be too high.
  • the content of Bi is too high, the reliability risk will be greater, and the solder ribbon 2 will be brittle and easily oxidized.
  • the content of Bi is 7.5% to 70%
  • the melting point of the solder layer 22 can be lowered, the low-temperature brittleness of the solder ribbon 2 can be reduced, and the oxidation of the solder ribbon 2 can be prevented.
  • the content of Bi is 10% to 70%
  • the content of Sn is 35% to 65%
  • the content of Pb is 10% to 40%.
  • the content of Sn can be fixed, and the melting point temperature of the solder layer 22 is different when the content of Bi is different.
  • the content of Bi increases by 1%
  • the content of Pb decreases by 1%
  • the melting point temperature can be reduced by about 2°C.
  • the content of Bi should not be too high.
  • the content of Bi is too high, the reliability risk will be greater, and the solder ribbon 2 will be brittle and easily oxidized.
  • the content of Bi is 10% to 70%
  • the melting point of the solder layer 22 can be lowered, the low temperature brittleness of the solder ribbon 2 can be reduced, and the oxidation of the solder ribbon 2 can be prevented.
  • the content of Bi is 8% to 40%
  • the content of Sn is 40% to 65%
  • the content of Pb is 25% to 40%.
  • the melting point temperature of the solder layer 22 may be higher; when the Bi content is greater than 40%, the reliability risk may be increased, the brittleness of the solder ribbon 2 may be increased, and oxidation may occur. Therefore, through the above arrangement, the melting point of the solder layer 22 can be further lowered, the low-temperature brittleness of the solder ribbon 2 can be reduced, and the oxidation of the solder ribbon 2 can be prevented.
  • the melting point temperature of the solder layer 22 is T, where T satisfies: 110°C ⁇ T ⁇ 145°C. Specifically, for example, when T ⁇ 110°C, the melting point temperature of the solder layer 22 is too low, and the brittleness is high, so that the reliability of the solder tape 2 is low; when T>145°C, the melting point temperature of the solder layer 22 is too high. If the value is high, the welding temperature of the welding strip 2 is higher, which may lead to a higher defect rate of the photovoltaic module, and there may be a virtual welding spot.
  • T satisfy: 110°C ⁇ T ⁇ 145°C
  • the melting point temperature of the solder layer 22 is relatively reasonable
  • the soldering tape 2 is a low-temperature soldering tape, so that the yield rate of the photovoltaic module can be improved, the false soldering can be avoided, and the Reduce low temperature brittleness and improve the reliability of the ribbon 2.
  • the welding strip 2 may be a circular welding strip, a triangular welding strip, a rectangular welding strip, or the like. Therefore, when the welding strip 2 is a circular welding strip, continuous welding with the cell 1 can be realized, and the series resistance can be reduced, thereby reducing the risk of cracking of the cell 1; when the welding strip 2 is a triangular welding strip, the welding The strip 2 has better welding performance and better reflective effect, which can improve the photoelectric conversion efficiency; when the welding strip 2 is a rectangular welding strip, the welding strip 2 is relatively flat and the thickness is small, so that the welding strip 2 can be enlarged.
  • the welding strip 2 may also be a combination of a triangular welding strip and a rectangular welding strip.
  • the ribbon 2 includes a triangular ribbon segment 23 and a rectangular ribbon segment 24 that are connected to each other in the length direction of the ribbon 2 .
  • the rectangular welding strip section 24 can be connected to the back of the cell 1, and the welding area between the rectangular welding strip section 24 and the cell 1 is large, which can improve the welding tension, thereby ensuring the reliability of the photovoltaic module, and the rectangular welding strip section 24 does not occupy the front area of the cell 1 .
  • the triangular welding strip section 23 can be connected to the front side of the adjacent cell 1, and the light irradiated on the triangular welding strip section 23 can finally be reflected on the cell 1, which can effectively improve the optical utilization rate of the front of the photovoltaic module and improve the photovoltaic module. power. In this way, while ensuring that the welding strip 2 has good welding performance, continuous welding with the cell 1 can be achieved, and the optical utilization rate of the photovoltaic module can be effectively improved.
  • the diameter of the welding strip 2 is d
  • the thickness of the solder layer 22 is t
  • d and t respectively satisfy: 0.15mm ⁇ d ⁇ 0.35mm , 10 ⁇ m ⁇ t ⁇ 20 ⁇ m.
  • the diameter of the welding strip 2 is too small, which may cause problems such as poor welding; when d>0.35 mm, the diameter of the welding strip 2 is too large, which may increase
  • the shielding area of the cell 1 affects the photoelectric conversion efficiency of the photovoltaic module.
  • t 1 ⁇ 10 ⁇ m the thickness of the solder layer 22 is too small, which may reduce the welding quality between the solder ribbon 2 and the secondary grid line 11 , and when t 1 >20 ⁇ m, the cost of the entire solder ribbon 2 is too high.
  • d and t 1 satisfy: 0.15mm ⁇ d ⁇ 0.35mm and 10 ⁇ m ⁇ t 1 ⁇ 20 ⁇ m respectively, while ensuring the welding quality between the ribbon 2 and the battery sheet 1, it is possible to reduce the impact on the battery sheet. 1 occlusion, and the cost is lower.
  • the photovoltaic assembly may include an upper glass layer, a front adhesive film layer, a solar cell module, a back adhesive film layer and a lower cover sheet.
  • the front adhesive film and the back adhesive film layer can be POE (ethylene-octene copolymer, which is a new polyolefin thermoplastic with narrow relative molecular mass distribution and narrow comonomer distribution and controllable structure developed with metallocene as catalyst. Elastomer) layer or EVA (ethylene-vinyl acetate copolymer is a general high molecular polymer) layer, etc.
  • the lower cover plate can be glass or back plate.
  • the solar cell module can be connected by a plurality of cell sheets 1 through soldering tapes 2 such as low-temperature soldering tapes, so as to realize the output of electric current.
  • a first feature being "above” or “beneath” a second feature may include the first and second features in direct contact, or may include the first and second features not in direct contact but through them Additional feature contacts between.

Landscapes

  • Photovoltaic Devices (AREA)

Abstract

一种光伏组件，包括：多个电池片（1），每个电池片（1）上设有间隔设置的多个副栅线（11）；多个焊带（2），多个焊带（2）沿副栅线（11）的长度方向间隔排布，每个焊带（2）沿多个副栅线（11）的排布方向延伸，每个焊带（2）与多个副栅线（11）均电连接，每个焊带（2）通过多个粘结件（3）与电池片（1）粘接，沿焊带（2）的长度方向、相邻两个粘结件（3）之间设有至少一个所述副栅线（11）。

Description

光伏组件 技术领域
本公开涉及光伏发电技术领域，尤其是涉及一种光伏组件。
背景技术
制作光伏组件时，通常需要采用焊带将多个电池片焊接连接成电池串，再将多个电池串铺设在玻璃与背板之间并用汇流条串联，然后进行层压、装框。相关技术中，焊带与电池片之间的接触力较小，从而使光伏组件的可靠性较低。
公开内容
本公开旨在至少解决现有技术中存在的技术问题之一。为此，本公开的一个目的在于提出一种光伏组件，可以提高电池片与焊带之间的接触力，提高光伏组件的可靠性。
根据本公开实施例的光伏组件，包括：多个电池片，每个所述电池片上设有间隔设置的多个副栅线；多个焊带，多个所述焊带沿所述副栅线的长度方向间隔排布，每个所述焊带沿多个所述副栅线的排布方向延伸，每个所述焊带与多个所述副栅线均电连接，每个所述焊带通过多个粘结件与所述电池片粘接，沿所述焊带的长度方向、相邻两个所述粘结件之间设有至少一个所述副栅线。
根据本公开实施例的光伏组件，通过使每个焊带与多个副栅线均电连接，并使每个焊带通过多个粘结件与电池片粘接且沿焊带的长度方向、相邻两个粘结件之间设有至少一个副栅线，可以在增大电池片与焊带之间的接触力的同时，提高焊带与副栅线之间的连接牢靠性，从而提高光伏组件的可靠性。另外，电池片上可以无需设置主栅线，一方面，可以减少银浆的使用量，降低成本，另一方面，可以避免主栅线对电池片的遮挡，进一步提高光伏组件的光学利用率。
根据本公开的一些实施例，每个所述粘结件位于相邻两个所述副栅线之间。
根据本公开的一些实施例，至少一个所述粘结件位于所述电池片的边缘与所述多个所述副栅线中最外侧的一个之间。
根据本公开的一些实施例，多个所述粘结件中的一部分位于所述电池片的边缘与所有的所述副栅线的一侧之间，多个所述粘结件中的另一部分位于所述电池片的边缘与所有的所述副栅线的另一侧之间。
根据本公开的一些实施例，多个所述粘结件包括至少一个第一粘结件和至少一个第二粘结件，所述第一粘结件位于所述电池片的边缘与所述多个所述副栅线中最外侧的一个之间，所述第二粘结件位于相邻两个所述副栅线之间。
根据本公开的一些实施例，所述第二粘结件为多个，沿所述焊带的长度方向、相邻两个所 述第二粘结件之间设有至少一个所述副栅线。
根据本公开的一些实施例，所述粘结件在沿所述副栅线的长度方向上的宽度小于或等于所述焊带的宽度。
根据本公开的一些实施例，所述粘结件的高度小于或等于所述副栅线的高度。
根据本公开的一些实施例，沿所述焊带的长度方向、邻近所述电池片的边缘的相邻两个所述粘结件之间的距离小于位于所述电池片中部的相邻两个所述粘结件之间的距离。
根据本公开的一些实施例，每个所述粘结件为绝缘件，每个所述粘结件与相邻的所述副栅线均间隔设置，或每个所述粘结件与相邻的至少一个所述副栅线接触。
根据本公开的一些实施例，每个所述粘结件印刷在所述电池片上；或每个所述粘结件涂覆在所述焊带上。
根据本公开的一些实施例，每个所述粘结件为树脂粘结剂。
根据本公开的一些实施例，每个所述粘结件包括导电粒子和非导电粒子中的其中一种、以及树脂。
根据本公开的一些实施例，当每个所述粘结件包括导电粒子和树脂时，所述导电粒子为Au、Ag、Cu和Sn中的至少一种。
根据本公开的一些实施例，多个所述粘结件在所述电池片上呈阵列排布。
根据本公开的一些实施例，沿所述焊带的长度方向、所述粘结件的个数为X，沿所述副栅线的长度方向、所述粘结件的个数为Y，其中所述X、Y分别满足：2≤X≤130，5≤Y≤30。
根据本公开的一些实施例，所述焊带包括导电基体和焊锡层，所述焊锡层包覆在所述导电基体外，所述焊锡层的熔点温度为T，其中所述T满足：110℃≤T≤145℃。
根据本公开的一些实施例，所述焊带为圆形焊带、三角形焊带、矩形焊带、或三角形焊带和矩形焊带的组合。
根据本公开的一些实施例，所述焊带包括导电基体和焊锡层，所述焊锡层包覆在所述导电基体外，当所述焊带为圆形焊带时，所述焊带的直径为d，所述焊锡层的厚度为t，其中所述d、t分别满足：0.15mm≤d≤0.35mm、10μm≤t≤20μm。
根据本公开的一些实施例，所述焊带包括：导电基体；焊锡层，所述焊锡层包覆在所述导电基体外，所述焊锡层由Sn和Bi组成；或所述焊锡层由Sn、Bi和Pb组成；其中，所述Bi的含量为7.5％～40％，所述Sn的含量为35％～65％，所述Pb的含量在10％～40％。
根据本公开的一些实施例，所述Sn的含量为40％～65％。
根据本公开的一些实施例，所述Pb的含量为25％～40％。
本公开的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本公开的实践了解到。
本公开的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本公开的实践了解到。
附图说明
本公开的上述和/或附加的方面和优点从结合下面附图对实施例的描述中将变得明显和容易理解，其中：
图1是根据本公开实施例的电池片的结构示意图；
图2a是根据本公开一个实施例的电池片的结构示意图；
图2b是根据本公开另一个实施例的电池片的结构示意图；
图2c是根据本公开再一个实施例的电池片的结构示意图；
图3是根据本公开实施例的光伏组件的结构示意图；
图4是沿图3中A-A线的局部剖面图；
图5是根据本公开一个实施例的焊带的横截面示意图；
图6是根据本公开另一个实施例的焊带的横截面示意图；
图7是根据本公开再一个实施例的焊带的横截面示意图；
图8是根据本公开又一个实施例的焊带的横截面示意图。
附图标记：
1：电池片；11：副栅线；2：焊带；
21：导电基体；22：焊锡层；23：三角形焊带段；
24：矩形焊带段；3：粘结件。
具体实施方式
下面详细描述本公开的实施例，参考附图描述的实施例是示例性的，下面详细描述本公开的实施例。
下面参考图1-图8描述根据本公开实施例的光伏组件。其中，光伏组件可以为异质结(一种特殊的PN结，由多于两层的不同的半导体材料薄膜依次沉积在同一基座上形成，这些材料具有不同的能带隙，且这些材料可以是砷化镓之类的化合物，也可以是硅-锗之类的半导体合金)组件。
如图3和图4所示，根据本公开实施例的光伏组件，包括多个电池片1和多个焊带2。在本公开的描述中，“多个”的含义是两个或多于两个。
每个电池片1上设有间隔设置的多个副栅线11。例如，在图1-图3的示例中，电池片1可以为单晶电池片，电池片1大体为矩形，电池片1的四个角处呈圆弧状。多个副栅线11可以沿左右方向延伸并在上下方向上均匀间隔设置。多个副栅线11可以相互平行且均平行于电池片1的其中两条对边。由此，通过设置上述的多个副栅线11，多个副栅线11可以将电池片1通过光生伏特效应所产生的电流引导出来。而且，电池片1上可以无需设置主栅线，一方面， 可以减少银浆的使用量，降低成本，另一方面，可以避免主栅线对电池片1的遮挡，提高光伏组件的光学利用率。
多个焊带2沿副栅线11的长度方向间隔排布，每个焊带2沿多个副栅线11的排布方向延伸。例如，图3的示例中示出了七个焊带2，七个焊带2均沿上下方向延伸且左右间隔设置，七个焊带2相互平行且均平行于电池片1的另外两条对边，此时多个焊带2与多个副栅线11垂直。每个焊带2与多个副栅线11均电连接。由此，如此设置的多个焊带2可以将多个副栅线11所引导的电流输送出去。
如图2a-图2c所示，每个焊带2通过多个粘结件3与电池片1粘接，沿焊带2的长度方向、相邻两个粘结件3之间设有至少一个副栅线11。由此，当沿焊带2的长度方向、相邻两个粘结件3之间设有一个副栅线11时，每两个相邻的副栅线11之间均设有一个粘结件3，此时粘结件3的数量比副栅线11的数量少一个，可以有效保证焊带2与电池片1之间的牢靠连接；当沿焊带2的长度方向、相邻两个粘结件3之间设有多个副栅线11时，粘结件3的数量相对较少，从而可以减少对电池片1的遮挡，保证光伏组件的光学利用率。与现有的光伏组件相比，可以增大电池片1与焊带2之间的接触力，且使焊带2与副栅线11之间的连接更加牢靠，从而可以提高光伏组件的可靠性。
需要说明的是，图3中显示了七个焊带2用于示例说明的目的，但是普通技术人员在阅读了本申请的技术方案之后、显然可以理解将该方案应用到其它数量的焊带2的技术方案中，这也落入本公开的保护范围之内。
根据本公开实施例的光伏组件，通过使每个焊带2与多个副栅线11均电连接，并使每个焊带2通过多个粘结件3与电池片1粘接且沿焊带2的长度方向、相邻两个粘结件3之间设有至少一个副栅线11，可以在增大电池片1与焊带2之间的接触力的同时，提高焊带2与副栅线11之间的连接牢靠性，从而提高光伏组件的可靠性。另外，电池片1上可以无需设置主栅线，一方面，可以减少银浆的使用量，降低成本，另一方面，可以避免主栅线对电池片1的遮挡，进一步提高光伏组件的光学利用率。
在本公开的一些实施例中，参照图2a和图3，每个粘结件3位于相邻两个副栅线11之间。如此设置，多个粘结件3可以在增大电池片1与焊带2之间的接触力的同时，使光伏组件的结构简单，方便布置。
在本公开的另一些实施例中，结合图2c，至少一个粘结件3位于电池片1的边缘与上述多个副栅线11中最外侧的一个之间。例如，在图2c的示例中，电池片1的与副栅线11相平行的两个边缘可以分别为第一边缘和第二边缘，多个副栅线11中最外侧的两个可以分别为第一副栅线和第二副栅线，第一副栅线邻近第一边缘设置，第二副栅线邻近第二边缘设置。每个焊带2可以通过两个粘结件3与电池片1粘接。两个粘结件3中的其中一个可以位于第一边缘与第一副栅线之间，两个粘结件3中的另一个可以位于第二边缘与第二副栅线之间。如此设置，粘结件3对电池片1的遮挡面积较小，从而可以保证光伏组件具有较高的光学利用 率。
在本公开的一些具体实施例中，结合图2c，多个粘结件3中的一部分位于电池片1的边缘与所有的副栅线11的一侧之间，多个粘结件3中的另一部分位于电池片1的边缘与所有的副栅线11的另一侧之间。例如，在图2c的示例中，每个焊带2可以通过两个粘结件3与电池片1粘接。两个粘结件3中的其中一个位于第一边缘与第一副栅线之间，两个粘结件3中的另一个可以位于第二边缘与第二副栅线之间。由此，通过上述设置，多个粘结件3可以均邻近电池片1的边缘设置，在保证焊带2与电池片1牢靠连接的同时，可以进一步减小粘结件3的遮光面积。
当然，本公开不限于此，在本公开的另一些实施例中，参照图2b，多个粘结件3包括至少一个第一粘结件和至少一个第二粘结件，第一粘结件位于电池片1的边缘与多个副栅线11中最外侧的一个之间，第二粘结件位于相邻两个副栅线11之间。如此设置，多个粘结件3可以连接焊带2与电池片1的中部以及焊带2与电池片1的边缘处，从而可以使焊带2与电池片1之间的连接更加牢靠。
在本公开的一些具体实施例中，参照图2a和图2b，第二粘结件为多个，沿焊带2的长度方向、相邻两个第二粘结件之间设有至少一个副栅线11。由此，当沿焊带2的长度方向、相邻两个第二粘结件之间设有一个副栅线11时，每两个相邻的副栅线11之间均设有一个第二粘结件，此时第二粘结件的数量比副栅线11的数量少一个，可以有效保证焊带2与电池片1之间的牢靠连接；当沿焊带2的长度方向、相邻两个第二粘结件之间设有多个副栅线11时，第二粘结件的数量相对较少，从而可以减少对电池片1的遮挡，保证光伏组件的光学利用率。
可以理解的是，本公开的描述中，粘结件3可以仅包括第一粘结件，也可以仅包括第二粘结件，或者同时包括第一粘结件和第二粘结件。
可选地，粘结件3在沿副栅线11的长度方向上的宽度可以小于或等于焊带2的宽度。这样，在保证焊带2与电池片1之间的牢靠连接的同时，可以有效减小粘结件3的遮光面积。
在本公开的一些可选实施例中，粘结件3的高度可以小于或等于副栅线11的高度。如此设置，可以避免由于粘结件3的高度过大而影响焊带2与副栅线11之间的焊接，从而可以保证焊接的牢靠性。
进一步地，参照图2b，沿焊带2的长度方向、邻近电池片1的边缘的相邻两个粘结件3之间的距离小于位于电池片1中部的相邻两个粘结件3之间的距离。这里，需要说明的是，“电池片1中部”应作广义理解，指的是相对于电池片1的边缘靠近电池片1中间的部分，而不限于仅指电池片1的中央。由此，通过上述设置，邻近电池片1的边缘处的粘结件3分布较密集，位于电池片1的中部的粘结件3的分布较为稀疏，在保证焊带2与电池片1的牢靠连接的同时，可以有效提升焊带2与副栅线11之间的焊接拉力，从而使光伏组件具有优异的电性能。
在本公开的一些实施例中，每个粘结件3为绝缘件，每个粘结件3与相邻的副栅线11均 间隔设置。例如，当粘结件3为第一粘结件时，粘结件3与相邻的副栅线11间隔设置；当粘结件3为第二粘结件时，粘结件3与相邻两个副栅线11均间隔设置，如图4所示。由此，通过使绝缘的每个粘结件3与相邻的副栅线11均彼此间隔开，可以避免粘结件3覆盖副栅线11而影响副栅线11与对应的焊带2之间的电连接，从而可以保证电流的正常输出，使光伏组件具有较高的输出功率。
当然，本公开不限于此，在本公开的另一些实施例中，每个粘结件3与相邻的至少一个副栅线11接触。例如，当粘结件3可以导电时，如果粘结件3为第一粘结件，粘结件3可以与相邻的一个副栅线11接触；如果粘结件3为第二粘结件，粘结件3可以与相邻两个副栅线11中的至少一个接触。此时粘结件3与相接触的副栅线11和焊带2均电连接。电流可以从与粘结件3接触的副栅线11传递至粘结件3，并最终传递至焊带2，以实现电流的输出。如此设置，在保证焊带2与电池片1之间的牢靠连接的同时，可以减小副栅线11与焊带2之间的电阻，有利于电流的正常输出，且结构简单，加工方便，可以降低粘结件3的加工精度。
可选地，每个粘结件3可以印刷在电池片1上。例如，制作时，可以在电池片1的面向多个焊带2的一侧表面上印刷多个粘结件3，然后使焊带2与副栅线11焊接连接且与电池片1粘接。由此，通过上述设置，在实现焊带2与电池片1之间的牢靠连接的同时，使每个粘结件3可以准确地印刷在相邻两个副栅线11之间，且操作方便。
当然，本公开不限于此，每个粘结件3还可以涂覆在焊带2上。如此设置，同样可以实现焊带2与电池片1之间的牢靠连接，且可以避免粘结件3的印刷面积过大，从而可以降低用料成本。
可选地，每个粘结件3可以为树脂粘结剂。例如，每个粘结件3可以为聚乙烯醇缩醛件、聚碳酸醋件、尼龙件或聚砜件等。但不限于此。如此设置，每个粘结件3具有较好的耐热性，可以进一步保证焊带2与电池片1之间的连接牢靠性。
或者可选地，每个粘结件3可以包括导电粒子和非导电粒子中的其中一种、以及树脂。也就是说，每个粘结件3可以包括导电粒子和树脂，或非导电粒子和树脂。例如，当每个粘结件3包括导电粒子和树脂时，导电粒子可以为Au、Ag、Cu和Sn中的至少一种。但不限于此。由此，当每个粘结件3包括导电粒子和树脂时，粘结件3具有很好的导电性，从而在保证焊带2与电池片1之间的牢靠连接的同时，方便了光伏组件的制作。
在本公开的一些实施例中，如图2a和图3所示，多个粘结件3在电池片1上呈阵列排布。例如，在图2a和图3的示例中，电池片1与焊带2之间设有六排七列粘结件3，七列粘结件3与七个焊带2分别对应，每列包括六个粘结件3。由此，如此设置的粘结件3结构简单，加工方便，且分布较均匀，从而使多个焊带2与电池片1之间的接触力较为均匀。
可选地，结合图3，沿焊带2的长度方向、粘结件3的个数为X，沿副栅线11的长度方向、粘结件3的个数为Y，其中X、Y分别满足：2≤X≤130，5≤Y≤30。例如，在图3的示例中，多个焊带2沿副栅线11的长度方向排布，且焊带2的排布方向与焊带2的长度方向相垂直。 粘结件3在副栅线11的长度方向上的个数Y即为焊带2的个数。具体地，当X＜2时，每个焊带2与电池片1之间的粘结件3个数过少，可能不能实现焊带2与电池片1之间的牢靠连接；当X＞130时，每个焊带2与电池片1之间的粘结件3个数过多，遮光面积过大，且结构复杂，成本较高，且不方便操作。当Y＜5时，粘结件3在副栅线11的长度方向上的个数过少，也就是焊带2的数量过少，可能不能很好地将副栅线11处汇集的电流输送出去；当Y＞30时，粘结件3在副栅线11的长度方向上的个数过多，也就是焊带2的数量过多，可能对电池片1的遮挡面积过大，且可能会降低电池片1的结构强度，降低光伏组件的光学利用率和良率。由此，通过使X、Y分别满足：2≤X≤130，5≤Y≤30，在保证焊带2与电池片1之间的牢靠连接的同时，可以减小粘结件3对电池片1的遮挡面积，使电流可以很好地输出，可以提高光伏组件的良率，且方便加工。
在本公开的一些实施例中，焊带2包括导电基体21和焊锡层22，焊锡层22包覆在导电基体21外。其中，导电基体21可以为铜基体、铜铝合金基体、铜银合金基体或铜银铝合金基体等。但不限于此。
具体而言，焊锡层22可以由Sn(锡，金属元素，一种有银白色光泽的金属元素)和Bi(铋，元素周期表第六周期VA族83号元素)组成。其中，Sn的熔点较低，且质地柔软，富有延展性，在焊带2与副栅线11之间的焊接中起重要作用。Bi元素可以降低焊锡层22的熔点温度，从而可以降低焊带2的焊接温度，提高光伏组件的良率，避免产生虚焊。且无污染，环境友好。
或者，焊锡层22还可以由Sn、Bi和Pb组成。由此，通过在焊锡层22中增加Pb，可以减小焊锡层22表面的张力和粘度，从而使焊锡层22具有较好的润湿性，且可以很好地吸收温度变化而产生的热应力。
其中，Bi的含量为7.5％～70％，Sn的含量为35％～65％，Pb的含量为10％～40％。具体地，例如，当焊锡层22由Sn、Bi和Pb组成时，Sn的含量可以固定不变，Bi的含量不同，焊锡层22的熔点温度不同。Bi的含量每增加1％，Pb的含量相应下降1％，熔点温度可以降低约2℃。但Bi的含量不能过高，当Bi含量过高时，可靠性风险越大，焊带2易脆，且易氧化。由此，通过使Bi的含量为7.5％～70％，可以在降低焊锡层22的熔点的同时，可以降低焊带2的低温脆性，防止焊带2氧化。
进一步地，Bi的含量为10％～70％，Sn的含量为35％～65％，Pb的含量在10％～40％。具体地，例如，当焊锡层22由Sn、Bi和Pb组成时，Sn的含量可以固定不变，Bi的含量不同，焊锡层22的熔点温度不同。Bi的含量每增加1％，Pb的含量相应下降1％，熔点温度可以降低约2℃。但Bi的含量不能过高，当Bi含量过高时，可靠性风险越大，焊带2易脆，且易氧化。由此，通过使Bi的含量为10％～70％，可以在降低焊锡层22的熔点的同时，可以降低焊带2的低温脆性，防止焊带2氧化。
再进一步地，Bi的含量为8％～40％，Sn的含量为40％～65％，Pb的含量为25％～40％。例如， 当Bi的含量小于8％时，可能会使焊锡层22的熔点温度偏高；当Bi的含量大于40％时，可能会增大可靠性风险，提高焊带2的脆性，出现氧化。由此，通过上述设置，可以进一步降低焊锡层22的熔点，降低焊带2的低温脆性，防止焊带2氧化。
可选地，焊锡层22的熔点温度为T，其中T满足：110℃≤T≤145℃。具体地，例如，当T＜110℃时，焊锡层22的熔点温度过低，脆性较大，从而使焊带2的可靠性较低；当T＞145℃时，焊锡层22的熔点温度过高，使焊带2的焊接温度较高，从而可能导致光伏组件的不良率较高，且可能存在虚焊处。由此，通过使T满足：110℃≤T≤145℃，焊锡层22的熔点温度较为合理，使焊带2为低温焊带，从而可以提高光伏组件的良率，避免产生虚焊，且可以降低低温脆性，提高焊带2的可靠性。
可选地，如图5-图7所示，焊带2可以为圆形焊带、三角形焊带或矩形焊带等。由此，当焊带2为圆形焊带时，可以实现与电池片1的连续焊接，且可以降低串联电阻，降低电池片1隐裂的风险；当焊带2为三角形焊带时，焊带2具有较好的焊接性能，且具有较好的反光效果，可以提高光电转换效率；当焊带2为矩形焊带时，焊带2较扁平，厚度较小，从而可以增大焊带2与电池片1的接触面积，从而实现焊带2与电池片1之间的牢靠连接。
当然，本公开不限于此，参照图8，焊带2还可以为三角形焊带和矩形焊带的组合。例如，在图8的示例中，焊带2包括三角形焊带段23和矩形焊带段24，三角形焊带段23和矩形焊带段24在焊带2的长度方向上彼此相连。例如，矩形焊带段24可以连接在电池片1的背面，矩形焊带段24与电池片1的焊接面积较大，可以提高焊接拉力，从而可以保证光伏组件的可靠性，且矩形焊带段24不占用电池片1的正面区域。三角形焊带段23可以连接在相邻电池片1的正面，照射到三角形焊带段23上的光线最终可以反射到电池片1上，可以有效提高光伏组件正面的光学利用率，提高光伏组件的功率。如此设置，在保证焊带2具有较好的焊接性能的同时，可以实现与电池片1的连续焊接，且可以有效提高光伏组件的光学利用率。
在本公开的一些实施例中，当焊带2为圆形焊带时，焊带2的直径为d，焊锡层22的厚度为t，其中d、t分别满足：0.15mm≤d≤0.35mm、10μm≤t≤20μm。
具体地，例如，当d＜0.15mm时，焊带2的直径过小，可能产生虚焊等焊接不良的问题；当d＞0.35mm时，焊带2的直径过大，从而可能会增大对电池片1的遮挡面积，影响光伏组件的光电转换效率。当t 1＜10μm时，焊锡层22的厚度过小，从而可能降低焊带2与副栅线11之间的焊接质量，当t 1＞20μm时，会导致整个焊带2的成本过高。由此，通过使d、t 1分别满足：0.15mm≤d≤0.35mm、10μm≤t 1≤20μm，在保证焊带2与电池片1之间的焊接质量的同时，可以减小对电池片1的遮挡，且成本较低。
可选地，光伏组件可以包括上层玻璃、正面胶膜层、太阳能电池模块、背面胶膜层和下层盖板。其中,正面胶膜和背面胶膜层可以为POE(乙烯-辛稀共聚物，是以茂金属作催化剂开发的具有窄相对分子质量分布和窄共聚单体分布、结构可控的新型聚烯烃热塑性弹性体)层或EVA(乙烯-醋酸乙烯酯共聚物是一种通用高分子聚合物)层等。下层盖板可以为玻璃或者背 板。太阳能电池模块可以由多个电池片1通过焊带2例如低温焊带连接，以实现电流的输出。
根据本公开实施例的光伏组件的其他构成以及操作对于本领域普通技术人员而言都是已知的，这里不再详细描述。
在本公开的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”、“轴向”、“径向”、“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本公开和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本公开的限制。
在本公开的描述中，第一特征在第二特征“之上”或“之下”可以包括第一和第二特征直接接触，也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。
在本说明书的描述中，参考术语“一个实施例”、“一些实施例”、“示意性实施例”、“示例”、“具体示例”、或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本公开的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施例或示例。
尽管已经示出和描述了本公开的实施例，本领域的普通技术人员可以理解：在不脱离本公开的原理和宗旨的情况下可以对这些实施例进行多种变化、修改、替换和变型，本公开的范围由权利要求及其等同物限定。

Claims (22)

  1. 一种光伏组件，其特征在于，包括：
    多个电池片，每个所述电池片上设有间隔设置的多个副栅线；
    多个焊带，多个所述焊带沿所述副栅线的长度方向间隔排布，每个所述焊带沿多个所述副栅线的排布方向延伸，每个所述焊带与多个所述副栅线均电连接，每个所述焊带通过多个粘结件与所述电池片粘接，沿所述焊带的长度方向、相邻两个所述粘结件之间设有至少一个所述副栅线。
  2. 根据权利要求1所述的光伏组件，其特征在于，每个所述粘结件位于相邻两个所述副栅线之间。
  3. 根据权利要求1所述的光伏组件，其特征在于，
    至少一个所述粘结件位于所述电池片的边缘与所述多个所述副栅线中最外侧的一个之间。
  4. 根据权利要求3所述的光伏组件，其特征在于，多个所述粘结件中的一部分位于所述电池片的边缘与所有的所述副栅线的一侧之间，多个所述粘结件中的另一部分位于所述电池片的边缘与所有的所述副栅线的另一侧之间。
  5. 根据权利要求1所述的光伏组件，其特征在于，多个所述粘结件包括至少一个第一粘结件和至少一个第二粘结件，所述第一粘结件位于所述电池片的边缘与所述多个所述副栅线中最外侧的一个之间，所述第二粘结件位于相邻两个所述副栅线之间。
  6. 根据权利要求5所述的光伏组件，其特征在于，所述第二粘结件为多个，沿所述焊带的长度方向、相邻两个所述第二粘结件之间设有至少一个所述副栅线。
  7. 根据权利要求1-6中任一项所述的光伏组件，其特征在于，所述粘结件在沿所述副栅线的长度方向上的宽度小于或等于所述焊带的宽度。
  8. 根据权利要求1-7中任一项所述的光伏组件，其特征在于，所述粘结件的高度小于或等于所述副栅线的高度。
  9. 根据权利要求1-8中任一项所述的光伏组件，其特征在于，沿所述焊带的长度方向、邻近所述电池片的边缘的相邻两个所述粘结件之间的距离小于位于所述电池片中部的相邻两个所述粘结件之间的距离。
  10. 根据权利要求1-9中任一项所述的光伏组件，其特征在于，每个所述粘结件为绝缘件，每个所述粘结件与相邻的所述副栅线均间隔设置；或
    每个所述粘结件与相邻的至少一个所述副栅线接触。
  11. 根据权利要求1-10中任一项所述的光伏组件，其特征在于，每个所述粘结件印刷在所述电池片上；或
    每个所述粘结件涂覆在所述焊带上。
  12. 根据权利要求1-11中任一项所述的光伏组件，其特征在于，每个所述粘结件为树脂 粘结剂。
  13. 根据权利要求1-11中任一项所述的光伏组件，其特征在于，每个所述粘结件包括导电粒子和非导电粒子中的其中一种、以及树脂。
  14. 根据权利要求13所述的光伏组件，其特征在于，当每个所述粘结件包括导电粒子和树脂时，所述导电粒子为Au、Ag、Cu和Sn中的至少一种。
  15. 根据权利要求1-14中任一项所述的光伏组件，其特征在于，多个所述粘结件在所述电池片上呈阵列排布。
  16. 根据权利要求1-15中任一项所述的光伏组件，其特征在于，沿所述焊带的长度方向、所述粘结件的个数为X，沿所述副栅线的长度方向、所述粘结件的个数为Y，其中所述X、Y分别满足：2≤X≤130，5≤Y≤30。
  17. 根据权利要求1-16中任一项所述的光伏组件，其特征在于，所述焊带包括导电基体和焊锡层，所述焊锡层包覆在所述导电基体外，所述焊锡层的熔点温度为T，其中所述T满足：110℃≤T≤145℃。
  18. 根据权利要求1-17中任一项所述的光伏组件，其特征在于，所述焊带为圆形焊带、三角形焊带、矩形焊带、或三角形焊带和矩形焊带的组合。
  19. 根据权利要求1-16中任一项所述的光伏组件，其特征在于，所述焊带包括导电基体和焊锡层，所述焊锡层包覆在所述导电基体外，
    当所述焊带为圆形焊带时，所述焊带的直径为d，所述焊锡层的厚度为t，其中所述d、t分别满足：0.15mm≤d≤0.35mm、10μm≤t≤20μm。
  20. 根据权利要求1-16中任一项所述的光伏组件，其特征在于，所述焊带包括：
    导电基体；
    焊锡层，所述焊锡层包覆在所述导电基体外，
    所述焊锡层由Sn和Bi组成；或
    所述焊锡层由Sn、Bi和Pb组成；
    其中，所述Bi的含量为7.5％～40％，所述Sn的含量为35％～65％，所述Pb的含量在10％～40％。
  21. 根据权利要求20所述的光伏组件，其特征在于，所述Sn的含量为40％～65％。
  22. 根据权利要求20所述的光伏组件，其特征在于，所述Pb的含量为25％～40％。
PCT/CN2021/109336 2020-08-10 2021-07-29 光伏组件 Ceased WO2022033322A1 (zh)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN202010797061.0 2020-08-10
CN202021650935.1U CN212676285U (zh) 2020-08-10 2020-08-10 光伏组件
CN202021650935.1 2020-08-10
CN202010797061.0A CN114078983B (zh) 2020-08-10 2020-08-10 光伏组件

Publications (1)

Publication Number Publication Date
WO2022033322A1 true WO2022033322A1 (zh) 2022-02-17

Family

ID=80247681

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2021/109336 Ceased WO2022033322A1 (zh) 2020-08-10 2021-07-29 光伏组件

Country Status (1)

Country Link
WO (1) WO2022033322A1 (zh)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115172484A (zh) * 2022-06-28 2022-10-11 浙江晶科能源有限公司 太阳能电池及光伏组件
WO2023016582A1 (zh) * 2021-08-13 2023-02-16 中能创光电科技(常州)有限公司 光伏电池串及其制备方法、串焊设备和光伏组件
WO2023197764A1 (zh) * 2022-04-15 2023-10-19 无锡奥特维科技股份有限公司 一种电池串焊接机及电池串焊接方法
CN117102780A (zh) * 2023-08-31 2023-11-24 浙江晶科能源有限公司 一种焊接工装、光伏组件的串焊方法和焊接装置
CN117283191A (zh) * 2023-09-19 2023-12-26 晶科能源(义乌)有限公司 光伏电池片焊接系统以及光伏电池片焊接方法
WO2025001453A1 (zh) * 2023-06-28 2025-01-02 隆基绿能科技股份有限公司 一种电池串及光伏组件
CN119486352A (zh) * 2024-11-07 2025-02-18 晶科能源股份有限公司 光伏组件
WO2025035974A1 (zh) * 2023-08-17 2025-02-20 隆基绿能科技股份有限公司 一种背接触电池串组及光伏组件
WO2025044664A1 (zh) * 2023-08-30 2025-03-06 隆基绿能科技股份有限公司 电池片、电池串及光伏组件
WO2025055516A1 (zh) * 2023-09-13 2025-03-20 隆基绿能科技股份有限公司 一种光伏组件
WO2025066421A1 (zh) * 2023-09-27 2025-04-03 隆基绿能科技股份有限公司 一种光伏组件及其制备方法
WO2026008033A1 (zh) * 2024-07-05 2026-01-08 隆基绿能科技股份有限公司 一种光伏组件、光伏组件的制备方法及网版

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120214271A1 (en) * 2009-03-23 2012-08-23 Sanyo Electric Co., Ltd. Manufacture method for photovoltaic module
CN105576057A (zh) * 2014-10-31 2016-05-11 比亚迪股份有限公司 太阳能电池组件及其制备方法
CN209544361U (zh) * 2018-10-24 2019-10-25 君泰创新（北京）科技有限公司 太阳能电池片的栅线结构、太阳能电池片及太阳能电池
CN110993733A (zh) * 2019-12-04 2020-04-10 通威太阳能（合肥）有限公司 一种光伏组件制作方法
CN210607282U (zh) * 2019-10-09 2020-05-22 西南石油大学 一种异质结太阳电池的金属电极组件
CN112420854A (zh) * 2020-11-02 2021-02-26 苏州阿特斯阳光电力科技有限公司 光伏组件
CN212676285U (zh) * 2020-08-10 2021-03-09 苏州阿特斯阳光电力科技有限公司 光伏组件

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120214271A1 (en) * 2009-03-23 2012-08-23 Sanyo Electric Co., Ltd. Manufacture method for photovoltaic module
CN105576057A (zh) * 2014-10-31 2016-05-11 比亚迪股份有限公司 太阳能电池组件及其制备方法
CN209544361U (zh) * 2018-10-24 2019-10-25 君泰创新（北京）科技有限公司 太阳能电池片的栅线结构、太阳能电池片及太阳能电池
CN210607282U (zh) * 2019-10-09 2020-05-22 西南石油大学 一种异质结太阳电池的金属电极组件
CN110993733A (zh) * 2019-12-04 2020-04-10 通威太阳能（合肥）有限公司 一种光伏组件制作方法
CN212676285U (zh) * 2020-08-10 2021-03-09 苏州阿特斯阳光电力科技有限公司 光伏组件
CN112420854A (zh) * 2020-11-02 2021-02-26 苏州阿特斯阳光电力科技有限公司 光伏组件

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023016582A1 (zh) * 2021-08-13 2023-02-16 中能创光电科技(常州)有限公司 光伏电池串及其制备方法、串焊设备和光伏组件
WO2023197764A1 (zh) * 2022-04-15 2023-10-19 无锡奥特维科技股份有限公司 一种电池串焊接机及电池串焊接方法
CN115172484A (zh) * 2022-06-28 2022-10-11 浙江晶科能源有限公司 太阳能电池及光伏组件
WO2025001453A1 (zh) * 2023-06-28 2025-01-02 隆基绿能科技股份有限公司 一种电池串及光伏组件
WO2025035974A1 (zh) * 2023-08-17 2025-02-20 隆基绿能科技股份有限公司 一种背接触电池串组及光伏组件
WO2025044664A1 (zh) * 2023-08-30 2025-03-06 隆基绿能科技股份有限公司 电池片、电池串及光伏组件
CN117102780A (zh) * 2023-08-31 2023-11-24 浙江晶科能源有限公司 一种焊接工装、光伏组件的串焊方法和焊接装置
WO2025055516A1 (zh) * 2023-09-13 2025-03-20 隆基绿能科技股份有限公司 一种光伏组件
CN117283191A (zh) * 2023-09-19 2023-12-26 晶科能源(义乌)有限公司 光伏电池片焊接系统以及光伏电池片焊接方法
WO2025066421A1 (zh) * 2023-09-27 2025-04-03 隆基绿能科技股份有限公司 一种光伏组件及其制备方法
WO2026008033A1 (zh) * 2024-07-05 2026-01-08 隆基绿能科技股份有限公司 一种光伏组件、光伏组件的制备方法及网版
CN119486352A (zh) * 2024-11-07 2025-02-18 晶科能源股份有限公司 光伏组件

Similar Documents

Publication Publication Date Title
WO2022033322A1 (zh) 光伏组件
CN114078983B (zh) 光伏组件
CN113851550B (zh) 一种太阳能电池串及其制备方法和应用
CN112420854A (zh) 光伏组件
JP5410050B2 (ja) 太陽電池モジュール
CN212659550U (zh) 光伏组件
CN212676285U (zh) 光伏组件
EP4557378A1 (en) Photovoltaic cell unit and preparation methods therefor
US20240194809A1 (en) Photovoltaic module
CN107195719A (zh) 叠瓦式太阳能光伏组件及生产设备
WO2011024662A1 (ja) 太陽電池ストリング及びそれを用いた太陽電池モジュール
WO2024012161A1 (zh) 无主栅ibc电池组件单元及制作方法、电池组件、电池组串
CN111403490A (zh) 太阳能电池互联结构制备方法
CN114068733B (zh) 电池片和具有其的光伏组件
CN218160412U (zh) 一种防遮挡光伏电池组件
CN218827159U (zh) 复合膜和无主栅太阳能电池组件
CN116247129A (zh) 一种无主栅xbc电池组件的制备方法及其电池组件
CN110707167A (zh) 背接触太阳能电池组件生产方法及背接触太阳能电池组件
CN111725335A (zh) Hbc高效太阳能电池背电极连接及封装一体化结构
CN215183991U (zh) 电池片和具有其的光伏组件
CN217983371U (zh) 电池片和具有其的光伏组件
CN111739969A (zh) 一种光伏模组及其串联方法
CN119092576A (zh) 光伏组件
CN114093969A (zh) 电池片和具有其的光伏组件及光伏组件的制作方法
CN116454151B (zh) 光伏组件

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21855375

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 21855375

Country of ref document: EP

Kind code of ref document: A1