WO2022007313A1 - 汇流条、光伏组件及电池串的连接方法 - Google Patents

汇流条、光伏组件及电池串的连接方法 Download PDF

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Publication number
WO2022007313A1
WO2022007313A1 PCT/CN2020/131857 CN2020131857W WO2022007313A1 WO 2022007313 A1 WO2022007313 A1 WO 2022007313A1 CN 2020131857 W CN2020131857 W CN 2020131857W WO 2022007313 A1 WO2022007313 A1 WO 2022007313A1
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Prior art keywords
adhesive film
conductive adhesive
bus bar
folded portion
conductive
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PCT/CN2020/131857
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English (en)
French (fr)
Inventor
薛斌斌
王彬源
解舜栋
郑记红
王振浩
吕志文
Original Assignee
咸阳隆基乐叶光伏科技有限公司
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Publication of WO2022007313A1 publication Critical patent/WO2022007313A1/zh

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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
    • H01L31/02—Details
    • H01L31/02002—Arrangements for conducting electric current to or from the device in operations
    • H01L31/02005—Arrangements for conducting electric current to or from the device in operations for device characterised by at least one potential jump barrier or surface barrier
    • H01L31/02008—Arrangements for conducting electric current to or from the device in operations for device characterised by at least one potential jump barrier or surface barrier for solar cells or solar cell modules
    • H01L31/0201—Arrangements for conducting electric current to or from the device in operations for device characterised by at least one potential jump barrier or surface barrier for solar cells or solar cell modules comprising specially adapted module bus-bar structures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/02—Details
    • 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
    • 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
    • H01L31/1876—Particular processes or apparatus for batch treatment of the devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
    • H02S40/30—Electrical components
    • H02S40/34—Electrical components comprising specially adapted electrical connection means to be structurally associated with the PV module, e.g. junction boxes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • 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 disclosure relates to the technical field of photovoltaic components, and in particular, to a connection method of a bus bar, a photovoltaic component and a battery string.
  • Photovoltaic modules using solar energy as a green renewable energy have been widely used.
  • a plurality of solar cells are connected in series to form a battery string, and the plurality of battery strings are connected by bus bars.
  • the battery strings and the bus bars are usually connected by welding ribbons, and the welding ribbons and the bus bars are connected by welding.
  • Embodiments of the present disclosure provide a method for connecting a bus bar, a photovoltaic module, and a battery string, so as to solve the problems of difficulty in solder connection alignment operation and easy generation of solder slag.
  • an embodiment of the present disclosure provides a bus bar, comprising: a first folded portion and a second folded portion that are relatively foldable; wherein,
  • One end of the first folded portion is connected to one end of the second folded portion
  • the first folding portion includes: a conductive substrate and a first conductive adhesive film, and the first conductive adhesive film is attached to the conductive substrate;
  • the second folding portion includes a protective substrate and a second conductive adhesive film, and the protective substrate is attached with the second conductive adhesive film.
  • first conductive adhesive film is attached to the side of the conductive substrate close to the second folded portion
  • the second conductive adhesive film is attached to one side of the protective substrate close to the first folded portion.
  • first folded portion and one end of the second folded portion are connected through the first conductive adhesive film and the second conductive adhesive film.
  • the conductive substrate is a copper foil substrate
  • the protective substrate is a PET board or a copper foil substrate
  • the first conductive adhesive film and the second conductive adhesive film are both a combination of an adhesive and conductive particles .
  • the adhesive is sub-sensitive conductive adhesive or acrylic adhesive
  • the conductive particles are silver powder particles.
  • the thickness of the conductive substrate is 0.1-1 mm, and the thickness of the first folded portion is 0.15-1.5 mm;
  • the thickness of the protective substrate is 0.1-1 mm, and the thickness of the second folding portion is 0.15-1.5 mm.
  • an embodiment of the present disclosure further provides a photovoltaic module, which is characterized by comprising: a battery string, a welding ribbon, and the bus bar according to any one of claims 1-6; wherein,
  • One end of the welding tape is connected to the end of the battery string, and the other end of the welding tape is bonded and connected to the bus bar.
  • the welding strip is a perforated welding strip.
  • an embodiment of the present disclosure further provides a method for connecting a battery string, where the battery string is the battery string in the above-mentioned photovoltaic module, and the connecting method includes:
  • a plurality of the welding tapes are sequentially bonded and connected to the first folded portion or the second folded portion of the bus bar;
  • the first folded portion and the second folded portion are folded relative to each other, so that a plurality of the welding tapes are bonded and connected to the first and second folded portions, so as to connect multiple each of the battery strings.
  • FIG. 1 shows a schematic diagram of a connection structure of a conductive connector provided by an embodiment of the present disclosure
  • FIG. 2 is a schematic structural diagram of a bus bar provided by an embodiment of the present disclosure
  • FIG. 3 is a schematic structural diagram of the bus bar provided in an embodiment of the present disclosure before bonding
  • FIG. 4 shows a schematic structural diagram of the bus bar provided in an embodiment of the present disclosure after bonding
  • FIG. 5 is a schematic diagram showing the connection structure of the bus bar and the battery string provided by the embodiment of the present disclosure
  • FIG. 6 is a schematic structural diagram of a photovoltaic module provided by an embodiment of the present disclosure.
  • FIG. 7 shows a flowchart of steps of a method for connecting a battery string provided by an embodiment of the present disclosure.
  • Embodiments of the present disclosure provide a conductive connector and a bus bar for bonding photovoltaic modules.
  • the conductive connector and the bus bar can be adhesively connected in a normal temperature or low temperature environment. Compared with the traditional welding connection, There is no need for high temperature curing, which saves the processing cost, and avoids the deformation and cracking of the cell due to high temperature stress, and also avoids the occurrence of solder slag.
  • FIG. 1 a schematic diagram of a connection structure of a conductive connector provided by an embodiment of the present disclosure is shown.
  • the conductive connector 20 provided by the embodiment of the present disclosure is mainly used in a photovoltaic assembly, and the photovoltaic assembly includes a plurality of cell sheets 10 , and the conductive connector 20 includes: a conductive substrate 201 and a first conductive adhesive film 202; wherein, the first conductive adhesive film 202 is attached to the conductive substrate 201, and the conductive substrate 201 is bonded and connected to two adjacent photovoltaic modules through the first conductive adhesive film 202.
  • the battery sheet 10; the first conductive adhesive film 202 is a combination of adhesive and conductive particles.
  • the adhesive in the adhesive can play the role of adhesive connection, which can connect the conductive substrate 201 and the battery sheet 10 .
  • Adhesive connection; the conductive particles can play a conductive role, and at the same time, the conductive substrate 201 can also conduct electricity, so that the conductive connector 20 formed by laminating the conductive substrate 201 and the first conductive adhesive film 202 can not only adhere
  • Connecting the battery sheets 10 can also conduct electricity between two adjacent battery sheets 10 to achieve the purpose of transferring current.
  • the conductive connector 20 provided by the embodiment of the present disclosure can connect two adjacent battery sheets 10 in a normal temperature or low temperature environment, and has adhesion at the beginning, so the alignment and bonding operation is simple. Moreover, high temperature curing is not required, which not only reduces the processing cost, but also avoids the occurrence of cracks and fragments of the battery sheet 10 caused by the stress caused by the high temperature. At the same time, there is no problem of glue overflow, which simplifies the processing procedure, improves the processing efficiency, and improves the process yield of photovoltaic modules.
  • the conductive connectors 20 described in the embodiments of the present disclosure can not only be used to connect two adjacent cell sheets 10 in a conventional photovoltaic module, but also can be used to connect cell sheets 10 in a shingled module.
  • the width of the conductive connector 20 may be determined according to the width of the battery sheet 10 .
  • the depth of the laminated can be adjusted by using different widths of the conductive connectors 20 to reduce the shaded part of the light-receiving surface of the cell 10 and improve the conversion efficiency of the photovoltaic assembly.
  • the first conductive adhesive film 202 is attached to the first surface and the second surface opposite to the conductive substrate 201 ; the first conductive adhesive located on the first surface The film 202 is used for bonding and connecting the back of one of the battery sheets 10 , and the first conductive adhesive film 202 on the second side is used for bonding and connecting the front side of the adjacent battery sheets 10 .
  • the first conductive adhesive film 202 on the two sides can be used to connect different On the front or back of the cell 10, when connecting the two adjacent cells 10, the positive and negative electrodes of the two adjacent cells 10 can be connected, so as to achieve the purpose of connecting the cells 10 in series to obtain a photovoltaic module. 40 in the battery string.
  • the conductive substrate 201 may be a metal substrate, which not only plays a role of supporting the first conductive adhesive film 202 but also plays a role of conducting electricity.
  • the adhesive can be sub-sensitive conductive adhesive or acrylic adhesive
  • the conductive particles can be silver powder particles such as silver-coated copper particles, silver-coated glass micropowder particles, and silver-coated nickel particles.
  • the conductive substrate 201 is a copper foil substrate, and the copper foil has good flexibility while conducting electricity, and the shape of the conductive connector 20 can be changed as required.
  • the adhesive is acrylic glue, and the acrylic glue has ideal bonding effects such as fast bonding speed, high strength, no bubbles, no whitening, no yellowing, no cracking, and excellent transparency.
  • the conductive substrate 201 not only needs to have a certain strength, but also needs to have a certain flexibility, so that it can be bent into different angles to connect two parts of adjacent battery sheets 10 at different positions.
  • the thickness of 201 should not be too large or too small.
  • the thickness of the conductive substrate 201 may be 0.1-1 mm, which not only meets the above requirements, but also has certain aesthetics.
  • the thickness of the obtained conductive connecting member 20 may be 0.15-1.5 mm.
  • the conductive connectors provided by the embodiments of the present disclosure have the following advantages:
  • the conductive connector obtained by the conductive substrate and the first conductive adhesive film can be attached to two adjacent cells in the photovoltaic module under normal temperature or low temperature environment, and has adhesion at the beginning, so
  • the alignment and fitting operation is simple.
  • high-temperature curing is not required, which not only reduces the processing cost, but also avoids the occurrence of cracks and fragments of the cell due to stress caused by high temperature.
  • glue overflow which simplifies the processing procedure, improves the processing efficiency, and improves the process yield of photovoltaic modules.
  • FIG. 2 a schematic structural diagram of a bus bar provided by an embodiment of the present disclosure is shown.
  • an embodiment of the present disclosure further provides a bus bar, and the bus bar 30 specifically includes: a second folded portion 301 and a first folded portion 302 that can be folded relatively; One end of the folded portion 301 is connected to one end of the first folded portion 302; the first folded portion 302 includes: the above-mentioned conductive substrate 201 and the first conductive adhesive film 202, and the conductive substrate 201 is attached to the There is the first conductive adhesive film 202 ; the second folding portion 301 includes a protective substrate 3011 and a second conductive adhesive film 3012 , and the second conductive adhesive film 3012 is attached to the protective substrate 3011 .
  • the bus bar 30 is composed of a second folded portion 301 and a first folded portion 302 that are foldable relative to each other, and one end of the second folded portion 301 is connected to one end of the first folded portion 302 , when bonding and connecting components such as the welding tape, the welding tape can be attached between the second folding part 301 and the first folding part 302 by relatively folding the second folding part 301 and the first folding part 302 and the welding tape is bonded through the first conductive adhesive film 202 and the second conductive adhesive film 3012, so that the purpose of connecting the bus bar 30 and the welding tape can be achieved, and the operation is convenient.
  • the bus bar 30 provided by the embodiment of the present disclosure does not require a high temperature environment or other complicated operations during the connection process, thereby reducing the processing cost, and the first conductive adhesive film 202 or the second conductive adhesive film 3012 can be used for preliminary Alignment provides convenience for subsequent lamination operations. At the same time, during the operation, no solder slag is generated, and there is no problem of glue overflow, which simplifies the processing process, improves the processing efficiency, and improves the process yield of the photovoltaic module.
  • the second folded portion 301 and the first folded portion 302 can also form a “V”-shaped bus bar 30 as shown in FIG. 3 .
  • the "V"-shaped bus bar 30 When the "V"-shaped bus bar 30 is connected with other components, it can be deformed.
  • the second folded part 301 and the first folded part 302 are kneaded between the parts 302, so that the purpose of connecting the bus bar 30 and the welding tape can be achieved.
  • the first conductive adhesive film 202 of the first folded portion 302 is attached to the side of the conductive substrate 201 close to the second folded portion 301 ; the protective substrate 3011 is close to the
  • the second conductive adhesive film 3012 is attached to one side of the first folded portion 302 .
  • the solder tape embedded between the second folded portion 301 and the first folded portion 302 can be directly bonded to the first conductive adhesive film 202 and the second conductive adhesive film 3012 to achieve a fixed connection between the solder tape and the bus bar 30 purpose.
  • the welding tape can be bonded and connected to one of the first conductive adhesive film 202 and the second conductive adhesive film 3012 first, so as to play a role in positioning, making the alignment operation more convenient .
  • the first folded portion 302 formed by laminating the conductive substrate 201 and the first conductive adhesive film 202 has adhesion and conductivity.
  • the second folded portion 301 formed by laminating the protective substrate 3011 and the second conductive adhesive film 3012 also has adhesion and conductivity.
  • one end of the first folded portion 302 and one end of the second folded portion 301 are connected through the first conductive adhesive film 202 and the second conductive adhesive film 3012 , the flexibility of the connection becomes larger, so that the angle between the first folded portion 302 and the second folded portion 301 can be changed, and the operation is more labor-saving.
  • the second folded portion 301 and one end of the first folded portion 302 can be connected, that is, the second folded portion 301 is located in the second folded portion 302.
  • the first conductive adhesive film 202 at one end of the folded portion 301 is connected to the second conductive adhesive film 3012 at one end of the second folded portion 301 , so that the bus bars 30 are easily folded relative to each other.
  • the adhesive can be sub-sensitive conductive adhesive or acrylic adhesive
  • the conductive particles can be silver powder particles such as silver-coated copper particles, silver-coated glass micropowder particles, and silver-coated nickel particles.
  • the thickness of the conductive substrate 201 may be 0.1-1 mm, and the thickness of the first folded portion 302 obtained after attaching a certain thickness of the first conductive adhesive film 202 on the conductive substrate 201 may be 0.15-1.5 mm.
  • the thickness of the protective substrate 3011 may be 0.1-1 mm. After the second conductive adhesive film 3012 with a certain thickness is attached to the protective substrate 3011, the thickness of the second folded portion 301 obtained is 0.15-1.5 mm. mm.
  • the protective substrate 3011 can be a copper foil substrate or a PET board (Polyethylene terephthalate board, polyester board), and the PET board has good mechanical strength, stiffness and hardness. In addition, the sliding performance and wear resistance are good, and the electrical insulation is good, and the bus bar 30 can be protected from oxidation and water vapor.
  • the second conductive adhesive film 3012 is also a combination of adhesive and conductive particles, and the specific material of the second conductive adhesive film 3012 will not be repeated here.
  • connection process of the bus bar 30 will be described by taking the bus bar 30 connected to the welding tape 50 at the end of the battery string 40 as an example.
  • FIG. 3 a schematic structural diagram of a bus bar provided by an embodiment of the present disclosure is shown before bonding.
  • FIG. 4 a schematic structural diagram of the bus bar provided by an embodiment of the present disclosure is shown. As shown in FIG. 3 , before the bus bar 30 is connected to the welding tape 50 at the end of the battery string 40 , the welding tape 50 can be clamped between the first folded portion 302 and the second folded portion of the “V”-shaped bus bar 30 .
  • the second conductive adhesive film 3012 of the second folded part 301 is bonded and connected to the welding tape 50 for alignment, and then the first folded part 302 can be oriented toward the folded part 302 by pressing the tool 60 .
  • the welding tape 50 is pressed together, so that the first conductive adhesive film 202 of the first folded portion 302 is bonded and connected to the welding tape 50.
  • the bus bar 30 is deformed into a “U”-shaped bus bar 30, as shown in FIG. 4 . .
  • FIG. 5 a schematic diagram of the connection structure of the bus bar and the battery string provided by the embodiment of the present disclosure is shown.
  • the welding tape 50 can also be bonded and connected to the first conductive adhesive film 202 of the first folded portion 302 for alignment.
  • the whole operation process does not require high temperature, and the operation process is simple, which improves the processing efficiency and saves money. cost.
  • the welding ribbon 50 is not only the welding ribbon 50 in the common assembly, but also the perforated welding ribbon 50 in the shingled assembly.
  • bus bars provided by the embodiments of the present disclosure have the following advantages:
  • the connected piece only needs to be sandwiched between the first folded portion and the second folded portion and then kneaded and then bonded and connected, and no high temperature environment is required. There is no need for other complicated operations, thereby reducing the processing cost, and preliminary alignment can be performed through the first conductive adhesive film or the second conductive adhesive film, which provides convenience for subsequent lamination operations. At the same time, during the operation, no solder slag is generated, and there is no problem of glue overflow, which simplifies the processing process, improves the processing efficiency, and improves the process yield of the photovoltaic module.
  • FIG. 6 a schematic structural diagram of a photovoltaic assembly provided by an embodiment of the present disclosure is shown.
  • an embodiment of the present disclosure further provides a photovoltaic module, which may specifically include: a battery string 40 , a welding ribbon 50 and the above-mentioned bus bar 30 ; wherein one end of the welding ribbon 50 is connected to the battery string. The other end of the welding tape 50 is connected to the bus bar 30 by adhesive bonding.
  • the battery string 40 includes a plurality of battery sheets 10 , and the adjacent battery sheets 10 can be bonded and connected by the conductive connecting piece 20 , and the ends of the battery string 40 can also be connected to the welding tape through the conductive connecting piece 20 . 50 adhesive connections.
  • the battery strings 40 are obtained by bonding and connecting adjacent battery sheets 10 through the conductive connectors 20 , and then the ends of the battery strings 40 and the welding tapes 50 are bonded and connected by the conductive connectors 20 , and finally the above-mentioned confluence
  • the strips 30 and the welding tapes 50 are bonded and connected, and the adjacent battery strings 40 can also be bonded and connected by the conductive connectors 20, and finally the photovoltaic module is obtained.
  • the welding tape 50 may be a welding tape 50 for common photovoltaic modules, or a perforated welding tape for a shingled module, and the adjacent solar cells 10 may pass through the The conductive connectors 20 are bonded and connected in a shingled manner.
  • the photovoltaic modules provided by the embodiments of the present disclosure have the following advantages:
  • the photovoltaic modules provided by the embodiments of the present disclosure are all connected to the bus bars through conductive connectors during the processing process, that is, the first conductive adhesive film or the second conductive adhesive film is bonded and connected, and the whole process does not require a high temperature environment, nor does Other complex operations reduce the processing cost and avoid the occurrence of cracks and fragments of the cells caused by the stress caused by high temperature. At the same time, there will be no glue overflow problem. And through the first conductive adhesive film or the second conductive adhesive film, preliminary alignment can be performed, which provides convenience for subsequent lamination operations, simplifies processing procedures, and improves processing efficiency. At the same time, during the operation, no solder slag will be generated. , which improves the process yield of photovoltaic modules.
  • connection method of the battery string provided by the embodiment of the present disclosure is used to connect the battery string in the photovoltaic module described in the above-mentioned embodiment, and the connection method may specifically include:
  • Step S01 connecting the battery string and the edge portion of the welding tape; wherein one end of the battery string is connected to the welding tape.
  • the edge parts of the battery string and the welding tape can be bonded and connected through the conductive connection piece under normal temperature conditions.
  • two ends of each battery string are respectively connected with one of the welding strips.
  • Step S02 Adhering and connecting a plurality of the welding tapes to the first folded portion or the second folded portion of the bus bar in sequence under normal temperature conditions.
  • a preliminary The function of alignment is to facilitate the connection between the back welding strip and the bus bar.
  • Step S03 folding the first folded portion and the second folded portion relative to each other, so that a plurality of the welding tapes are bonded and connected to the first folded portion and the second folded portion, to connect a plurality of the battery strings.
  • the welding tape can be sandwiched between the first and second folded parts, and welded
  • the tape will be bonded and connected with the first conductive adhesive film and the second conductive adhesive film, so that it can be fixed in the middle of the bus bar, so that the purpose of connecting a plurality of battery strings can be achieved through the bus bar.
  • the bus bar can also realize electrical connection to a plurality of battery sheets, so as to achieve the purpose of transmitting current.
  • the plurality of battery strings may be connected in parallel or in series.
  • parallel connection it is only necessary to connect the welding ribbons of the same polarity of each battery string to the same bus bar.
  • series connection it is only necessary to connect the welding ribbons of two adjacent battery strings with different poles to the same bus bar.
  • the electrical connection of multiple battery strings is realized through the above-mentioned bus bars, the entire operation process is simple, no high temperature environment, and no other complicated operations are required, and the first conductive adhesive film or the second conductive adhesive is used.
  • the film can be preliminarily aligned, which provides convenience for subsequent lamination operations.
  • no solder slag is generated, and there is no problem of glue overflow, which simplifies the processing process, improves the processing efficiency, and improves the process yield of the photovoltaic module.
  • the device embodiments described above are only illustrative, wherein the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in One place, or it can be distributed over multiple network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution in this embodiment. Those of ordinary skill in the art can understand and implement it without creative effort.
  • any reference signs placed between parentheses shall not be construed as limiting the claim.
  • the word “comprising” does not exclude the presence of elements or steps not listed in a claim.
  • the word “a” or “an” preceding an element does not exclude the presence of a plurality of such elements.
  • the present disclosure may be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means may be embodied by one and the same item of hardware.
  • the use of the words first, second, and third, etc. do not denote any order. These words can be interpreted as names.

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Abstract

一种汇流条(30)、光伏组件及电池串(40)的连接方法，涉及光伏组件技术领域。汇流条(30)在连接的过程中，只需要将被连接件夹设在第一翻折部(301)和第二翻折部(302)之间并捏合后粘接连接即可，无需高温环境，也无需其他的复杂操作，从而降低了加工成本，并且通过第一导电胶膜(202)或者第二导电胶膜(3012)可以进行初步对位，为之后的贴合操作提供了便利。同时，操作过程中，不会产生焊锡渣，也不存在溢胶的问题，简化了加工工序，提高了加工效率，提升了光伏组件的制程良率。

Description

汇流条、光伏组件及电池串的连接方法
本申请要求在2020年07月08日提交中国专利局、申请号为202010653412.0、名称为“汇流条、光伏组件及电池串的连接方法”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本公开涉及光伏组件技术领域，尤其涉及一种汇流条、光伏组件及电池串的连接方法。
背景技术
随着能源短缺这一严峻问题的凸显，世界各国越来越关注清洁、无污染的可再生能源，以太阳能作为一种绿色的可再生能源的光伏组件得到了大规模的应用，在光伏组件中，通常通过多个太阳能电池片串联成电池串，多个电池串之间再通过汇流条连接。
现有技术中，电池串与汇流条之间通常通过焊带连接，而焊带与汇流条之间则采用焊接连接。
然而，在焊接过程中，由于焊带没有初粘性，对位贴合操作困难。并且焊接过程中需要进行高温固化，不仅增加了加工成本；而且在焊接过程中容易产生焊锡渣，降低光伏组件的质量。
概述
本公开实施例提供一种汇流条、光伏组件及电池串的连接方法，以解决焊接连接对位操作困难以及容易产生焊锡渣的问题。
为了解决上述技术问题，本公开是这样实现的：
第一方面，本公开实施例提供一种汇流条，包括：可相对折叠的第一翻折部和第二翻折部；其中，
所述第一翻折部的一端和所述第二翻折部的一端相连；
所述第一翻折部包括：导电基板和第一导电胶膜，所述导电基板上贴合 有所述第一导电胶膜；
所述第二翻折部包括防护基板和第二导电胶膜，所述防护基板上贴合有所述第二导电胶膜。
进一步地，所述导电基板靠近所述第二翻折部的一面贴合有所述第一导电胶膜；
所述防护基板靠近所述第一翻折部的一面贴合有所述第二导电胶膜。
进一步地，所述第一翻折部的一端和所述第二翻折部的一端通过所述第一导电胶膜和所述第二导电胶膜相连。
进一步地，所述导电基板为铜箔基板，所述防护基板为PET板或铜箔基板，所述第一导电胶膜、所述第二导电胶膜均为粘合剂和导电颗粒的结合体。
进一步地，所述粘合剂为亚敏导电胶或亚克力胶，所述导电颗粒为银粉颗粒。
进一步地，所述导电基板的厚度为0.1-1mm，所述第一翻折部的厚度为0.15-1.5mm；
所述防护基板的厚度为0.1-1mm，所述第二翻折部的厚度为0.15-1.5mm。
第二方面，本公开实施例还提供了一种光伏组件，其特征在于，包括：电池串、焊带、如权利要求1-6任一项所述的汇流条；其中，
所述焊带的一端与所述电池串的端部连接，所述焊带的另一端与所述汇流条粘接连接。
进一步地，所述焊带为打孔焊带。
第三方面，本公开实施例还提供了一种电池串的连接方法，所述电池串是上述的光伏组件中的电池串，所述连接方法包括：
连接电池串和焊带的边缘部分；其中，一个所述电池串的一端连接一个所述焊带；
在常温条件下，将多个所述焊带顺次粘接连接在汇流条的第一翻折部或第二翻折部上；
相对折叠所述第一翻折部和所述第二翻折部，以使多个所述焊带均与所 述第一翻折部和所述第二翻折部粘接连接，以连接多个所述电池串。
在本公开实施例中，汇流条在连接的过程中，只需要将被连接件夹设在第一翻折部和第二翻折部之间并捏合后粘接连接即可，无需高温环境，也无需其他的复杂操作，从而降低了加工成本，并且通过第一导电胶膜或者第二导电胶膜可以进行初步对位，为之后的贴合操作提供了便利。同时，操作过程中，不会产生焊锡渣，也不存在溢胶的问题，简化了加工工序，提高了加工效率，提升了光伏组件的制程良率。
上述说明仅是本公开技术方案的概述，为了能够更清楚了解本公开的技术手段，而可依照说明书的内容予以实施，并且为了让本公开的上述和其它目的、特征和优点能够更明显易懂，以下特举本公开的具体实施方式。
附图简述
为了更清楚地说明本公开实施例的技术方案，下面将对本公开实施例的描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本公开的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1表示本公开实施例提供的一种导电连接件的连接结构示意图；
图2表示本公开实施例提供的一种汇流条的结构示意图；
图3表示本公开实施例提供的汇流条粘接前的结构示意图；
图4表示本公开实施例提供的汇流条粘接后的结构示意图；
图5表示本公开实施例提供的汇流条与电池串的连接结构示意图；
图6表示本公开实施例提供的一种光伏组件的结构示意图；
图7表示本公开实施例提供的一种电池串的连接方法的步骤流程图。
附图标记说明：
1-光伏组件；10-电池片；20-导电连接件；201-导电基板；202-第一导电胶膜；30-汇流条；301-第二翻折部；3011-防护基板；3012-第二导电胶膜；302-第一翻折部；40-电池串；50-焊带；60-压合工装。
详细描述
下面将结合本公开实施例中的附图，对本公开实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本公开一部分实施例，而不是全部的实施例。基于本公开中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本公开保护的范围。
应理解，说明书通篇中提到的“一个实施例”或“一实施例”意味着与实施例有关的特定特征、结构或特性包括在本公开的至少一个实施例中。因此，在整个说明书各处出现的“在一个实施例中”或“在一实施例中”未必一定指相同的实施例。此外，这些特定的特征、结构或特性可以任意适合的方式结合在一个或多个实施例中。
在本公开的各种实施例中，应理解，下述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本公开实施例的实施过程构成任何限定。
本公开实施例提供了一种用于光伏组件贴合的导电连接件和汇流条，所述导电连接件和汇流条可以在常温或者低温环境下进行粘接连接，相比于传统的焊接连接，无需进行高温固化，节约了加工成本，而且避免了电池片因高温受应力而发生变形及隐裂的问题，同时也避免了产生焊锡渣的情况发生。
参见图1，示出了本公开实施例提供的一种导电连接件的连接结构示意图。如图1所示，本公开实施例提供的导电连接件20主要用于光伏组件中，所述光伏组件包括多个电池片10，所述导电连接件20包括：导电基板201和第一导电胶膜202；其中，所述导电基板201上贴合有所述第一导电胶膜202，所述导电基板201通过所述第一导电胶膜202粘接连接光伏组件中相邻的两个所述电池片10；所述第一导电胶膜202为粘合剂和导电颗粒的结合体。
在本公开的实施例中，由于第一导电胶膜202为粘合剂和导电颗粒的结合体，其中的粘合剂可以起到粘接连接的作用，其可以将导电基板201和电池片10粘接连接；其中的导电颗粒则可以起到导电的作用，同时，导电基板201也可以导电，从而使得由导电基板201和第一导电胶膜202贴合而成 的导电连接件20不仅可以粘接连接电池片10，还可以在相邻的两个电池片10之间导电，达到传递电流的目的。
本公开实施例提供的导电连接件20，可以在常温或者低温环境下连接相邻的两个电池片10，在初始就具有粘连性，所以对位贴合操作简单。并且无需进行高温固化，不仅降低了加工成本，而且避免了因高温导致的应力使电池片10产生隐裂及破片的情况发生。同时，也不会存在溢胶的问题，简化了加工工序，提高了加工效率，提升了光伏组件的制程良率。
本公开实施例所述的导电连接件20，不仅可以用于连接常规的光伏组件中相邻的两个电池片10，还可以用于连接叠瓦组件中的电池片10。在实际应用中，可以根据电池片10的宽度来确定导电连接件20的宽度。并且在用于叠片组件中的时候，可以通过使用不同导电连接件20的宽度来调整叠片的深度，以减少电池片10的受光面被遮挡的部分，提高了光伏组件的转换效率。
可选地，本公开实施例中，所述第一导电胶膜202贴合在所述导电基板201相背的第一面和第二面；位于所述第一面的所述第一导电胶膜202用于粘接连接其中一个所述电池片10的背面，位于所述第二面的所述第一导电胶膜202用于粘接连接相邻的所述电池片10的正面。
在本公开的实施例中，通过在导电基板201相背的两面，即第一面和第二面分别贴合第一导电胶膜202，可以通过两面上的第一导电胶膜202分别连接不同的电池片10的正面或背面，在连接相邻的两个电池片10的同时，可以将相邻两个电池片10的正极和负极连接，从而达到串联电池片10的目的，以获得光伏组件中的电池串40。
在实际应用中，导电基板201可以是金属基板，在起到支撑第一导电胶膜202的作用的同时，还可以起到导电的作用。粘合剂可以是亚敏导电胶或者亚克力胶，导电颗粒可以是银包铜颗粒、银包玻璃微粉颗粒、银包镍颗粒等银粉颗粒。
可选地，本公开实施例中，所述导电基板201为铜箔基板，铜箔在导电的同时，具有较好的柔性，可根据需要改变导电连接件20的形状。所述粘合剂为亚克力胶，亚克力胶具有粘接速度快、强度大、无气泡、不发白、不 发黄、不发裂、透明度极佳等理想的粘接效果。
在实际应用中，导电基板201不仅需要具备一定的强度，而且需要具备一定的柔性，以便于弯折成不同的角度，连接处于不同位置的相邻电池片10的两个部分，因此，导电基板201的厚度不能太大也不能太小。
可选地，本公开实施例中，所述导电基板201的厚度可以为0.1-1mm，在满足上述需求的同时，还具有一定的美观性。在导电基板201上贴合一定厚度的第一导电胶膜202后，得到的所述导电连接件20的厚度可以为0.15-1.5mm。
综上，本公开实施例提供的导电连接件具有以下优点：
在本公开实施例中，通过导电基板、第一导电胶膜获得的导电连接件，可以在常温或者低温环境下贴合光伏组件中相邻的两个电池片，在初始就具有粘连性，所以对位贴合操作简单。并且无需进行高温固化，不仅降低了加工成本，而且避免了因高温导致的应力使电池片产生隐裂及破片的情况发生。同时，也不会存在溢胶的问题，简化了加工工序，提高了加工效率，提升了光伏组件的制程良率。
参见图2，示出了本公开实施例提供的一种汇流条的结构示意图。如图2所示，本公开实施例还提供了一种汇流条，所述汇流条30具体包括：可相对折叠的第二翻折部301和第一翻折部302；其中，所述第二翻折部301的一端和所述第一翻折部302的一端相连；所述第一翻折部302包括：上述的导电基板201和第一导电胶膜202，所述导电基板201上贴合有所述第一导电胶膜202；所述第二翻折部301包括防护基板3011和第二导电胶膜3012，所述防护基板3011上贴合有所述第二导电胶膜3012。
在本公开的实施例中，汇流条30通过可相对折叠的第二翻折部301和第一翻折部302组成，并且第二翻折部301的一端和第一翻折部302的一端相连，在粘接连接焊带等部件的时候，可以通过相对折叠第二翻折部301和第一翻折部302，将焊带贴合在第二翻折部301和第一翻折部302之间，并通过第一导电胶膜202和第二导电胶膜3012粘接焊带，从而可以达到连接汇流条30和焊带的目的，操作便利。
本公开实施例提供的汇流条30，在连接的过程中无需高温环境，也无需其他的复杂操作，从而降低了加工成本，并且通过第一导电胶膜202或者第二导电胶膜3012可以进行初步对位，为之后的贴合操作提供了便利。同时，操作过程中，不会产生焊锡渣，也不存在溢胶的问题，简化了加工工序，提高了加工效率，提升了光伏组件的制程良率。
在实际应用中，第二翻折部301和第一翻折部302还可以组成一个如图3所示的“V”字型汇流条30。“V”字型汇流条30在与其他部件连接的时候，可以发生变形，通过将焊带等其他部件嵌设在“V”字型汇流条30的第二翻折部301和第一翻折部302之间，并捏合第二翻折部301和第一翻折部302，从而可以达到连接汇流条30和焊带的目的。
可选地，本公开实施例中，导电基板201靠近所述第二翻折部301的一面贴合有所述第一翻折部302的第一导电胶膜202；所述防护基板3011靠近所述第一翻折部302的一面贴合有所述第二导电胶膜3012。嵌设在第二翻折部301和第一翻折部302之间的焊带，可以直接与第一导电胶膜202和第二导电胶膜3012粘接连接，达到固定连接焊带和汇流条30的目的。
并且，在实际操作过程中，可以先将焊带与第一导电胶膜202和第二导电胶膜3012中的一个粘接连接，从而可以起到定位的作用，使得对位贴合操作更加便利。
在本公开的实施例中，由上述可知，由导电基板201和第一导电胶膜202贴合而成的第一翻折部302具有粘连性和导电性。由防护基板3011和第二导电胶膜3012贴合而成的第二翻折部301同样具有粘连性和导电性。通过在第二翻折部301和第一翻折部302相互靠近的两面上分别设置第二导电胶膜3012和第一导电胶膜202，使得汇流条30在与其他部件连接的过程中，通过捏合汇流条30，即可使得第二导电胶膜3012和第一导电胶膜202粘连在其他部件上，从而达到连接的目的，并且还具有导电的作用。
可选地，本公开实施例中，所述第一翻折部302的一端和所述第二翻折部301的一端通过所述第一导电胶膜202和所述第二导电胶膜3012相连，连接处柔性变大，以便于改变第一翻折部302和所述第二翻折部301之间的夹角，操作更省力。
在本公开的实施例中，通过第一导电胶膜202和第二导电胶膜3012相连，可以将第二翻折部301的一端和第一翻折部302的一端连接起来，即位于第二翻折部301的一端的第一导电胶膜202和位于第二翻折部301的一端的第二导电胶膜3012相连，使得汇流条30易于相对折叠。
在实际应用中，粘合剂可以是亚敏导电胶或者亚克力胶，导电颗粒可以是银包铜颗粒、银包玻璃微粉颗粒、银包镍颗粒等银粉颗粒。所述导电基板201的厚度可以为0.1-1mm，在导电基板201上贴合一定厚度的第一导电胶膜202后，得到的所述第一翻折部302的厚度可以为0.15-1.5mm。
同样的，所述防护基板3011的厚度可以为0.1-1mm，在防护基板3011上贴合一定厚度的第二导电胶膜3012后，得到的所述第二翻折部301的厚度为0.15-1.5mm。
在实际应用中，防护基板3011可以为铜箔基板，也可以为PET板(Polyethylene terephthalate板，聚酯板)，PET板具有较好的机械强度、刚度、硬度。且滑动性能和耐磨强度好，电气绝缘性好，可以对汇流条30起到防氧化及防水汽的作用。另外，与第一导电胶膜202一样，所述第二导电胶膜3012也为粘合剂和导电颗粒的结合体，此处对于第二导电胶膜3012的具体材质不再赘述。
现以汇流条30连接电池串40端部的焊带50为例，对汇流条30的连接过程进行说明。参见图3，示出了本公开实施例提供的汇流条粘接前的结构示意图，参见图4，示出了本公开实施例提供的汇流条粘接后的结构示意图。如图3所示，汇流条30与电池串40端部的焊带50连接前，可以先将焊带50夹设在“V”字型汇流条30的第一翻折部302和第二翻折部301之间，先将第二翻折部301的第二导电胶膜3012与焊带50粘接连接，以进行对位，然后可以通过压合工装60，将第一翻折部302朝焊带50压合，使第一翻折部302的第一导电胶膜202与焊带50粘接连接，此时，汇流条30变形为“U”字型汇流条30，如图4所示。从而达到连接汇流条30和电池串40的焊带50的目的，参照图5，示出了本公开实施例提供的汇流条与电池串的连接结构示意图。
在实际应用中，焊带50也可以先与第一翻折部302的第一导电胶膜202 粘接连接来对位，整个操作过程无需高温，且操作工艺简单，提供了加工效率，节约了成本。其中，焊带50除过是普通组件中的焊带50，也可以是叠瓦组件中的打孔焊带50。
综上，本公开实施例提供的汇流条具有以下优点：
本公开实施例提供的汇流条，在连接的过程中，只需要将被连接件夹设在第一翻折部和第二翻折部之间并捏合后粘接连接即可，无需高温环境，也无需其他的复杂操作，从而降低了加工成本，并且通过第一导电胶膜或者第二导电胶膜可以进行初步对位，为之后的贴合操作提供了便利。同时，操作过程中，不会产生焊锡渣，也不存在溢胶的问题，简化了加工工序，提高了加工效率，提升了光伏组件的制程良率。
参照图6，示出了本公开实施例提供的一种光伏组件的结构示意图。如图6所示，本公开实施例还提供了一种光伏组件，具体可以包括：电池串40、焊带50和上述的汇流条30；其中，所述焊带50的一端与所述电池串40的端部连接，所述焊带50的另一端与所述汇流条30粘接连接。
另外，所述电池串40包括多个电池片10，相邻的所述电池片10之间可以通过导电连接件20粘接连接，电池串40的端部也可以通过导电连接件20与焊带50粘接连接。
本公开实施例中，通过导电连接件20粘接连接相邻的电池片10得到电池串40，再通过导电连接件20粘接连接电池串40的端部和焊带50，最后通过上述的汇流条30与焊带50粘接连接，相邻的电池串40之间也可以通过导电连接件20粘接连接，最终获得所述光伏组件。
在实际应用中，所述焊带50可以为用于普通光伏组件的焊带50，也可以是用于叠瓦组件的打孔焊带，相邻的所述电池片10之间可以通过所述导电连接件20以叠瓦的方式粘接连接。
综上，本公开实施例提供的光伏组件具有以下优点：
本公开实施例提供的光伏组件，在加工过程中，均是通过导电连接件和汇流条连接，即通过第一导电胶膜或者第二导电胶膜粘接连接，整个过程无需高温环境，也无需其他的复杂操作，从而降低了加工成本，避免了因高温 导致的应力使电池片产生隐裂及破片的情况发生。同时，也不会存在溢胶的问题。并且通过第一导电胶膜或者第二导电胶膜可以进行初步对位，为之后的贴合操作提供了便利，简化了加工工序，提高了加工效率，同时，操作过程中，不会产生焊锡渣，提升了光伏组件的制程良率。
参照图7，示出了本公开实施例提供的一种电池串的连接方法的步骤流程图。如图7所示，本公开实施例提供的电池串的连接方法，用于连接上述实施例所述的光伏组件中的电池串，所述连接方法具体可以包括：
步骤S01：连接电池串和焊带的边缘部分；其中，一个所述电池串的一端连接一个所述焊带。
在实际操作过程中，可以在常温条件下，通过导电连接件粘接连接电池串和焊带的边缘部分。并且，每个电池串的两端分别连接一个所述焊带。
步骤S02：在常温条件下，将多个所述焊带顺次粘接连接在汇流条的第一翻折部或第二翻折部上。
通过将多个焊带顺次粘接连接在汇流条的第一翻折部上，或者，通过将多个焊带顺次粘接连接在汇流条的第二翻折部上，可以起到初步对位的作用，以便于后面焊带与汇流条的连接。
步骤S03：相对折叠所述第一翻折部和所述第二翻折部，以使多个所述焊带均与所述第一翻折部和所述第二翻折部粘接连接，以连接多个所述电池串。
在本公开的实施例中，通过相对折叠所述第一翻折部和所述第二翻折部，可以将焊带夹设在第一翻折部和第二翻折部之间，并且焊带会与第一导电胶膜和第二导电胶膜粘接连接，从而可以固定在汇流条中间，从而通过汇流条可以达到连接多个电池串的目的。并且，汇流条还可以对多个电池片实现电连接，达到传递电流的目的。
其中，多个电池串之间可以是并联，也可以是串联。在并联的情况下，只需要将每个电池串同极的焊带与同一个汇流条连接即可。在串联的情况下，只需要将相邻的两个电池串不同极的焊带与同一个汇流条连接即可。
在本公开的实施例中，通过上述汇流条实现了多个电池串的电连接，整 个操作过程简单，无需高温环境，也无需其他的复杂操作，并且通过第一导电胶膜或者第二导电胶膜可以进行初步对位，为之后的贴合操作提供了便利。同时，操作过程中，不会产生焊锡渣，也不存在溢胶的问题，简化了加工工序，提高了加工效率，提升了光伏组件的制程良率。
本说明书中的各个实施例均采用递进的方式描述，每个实施例重点说明的都是与其他实施例的不同之处，各个实施例之间相同相似的部分互相参见即可。
尽管已描述了本公开实施例的优选实施例，但本领域内的技术人员一旦得知了基本创造性概念，则可对这些实施例做出另外的变更和修改。所以，所附权利要求意欲解释为包括优选实施例以及落入本公开实施例范围的所有变更和修改。
需要说明的是，在本文中，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者装置不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者装置所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括该要素的过程、方法、物品或者装置中还存在另外的相同要素。
最后，还需要说明的是，在本文中，诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来，而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者终端设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者终端设备所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括所述要素的过程、方法、物品或者终端设备中还存在另外的相同要素。
上面结合附图对本公开的实施例进行了描述，但是本公开并不局限于上述的具体实施方式，上述的具体实施方式仅仅是示意性的，而不是限制性的， 本领域的普通技术人员在本公开的启示下，在不脱离本公开宗旨和权利要求所保护的范围情况下，还可做出很多形式，均属于本公开的保护之内。
以上所描述的装置实施例仅仅是示意性的，其中所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部模块来实现本实施例方案的目的。本领域普通技术人员在不付出创造性的劳动的情况下，即可以理解并实施。
本文中所称的“一个实施例”、“实施例”或者“一个或者多个实施例”意味着，结合实施例描述的特定特征、结构或者特性包括在本公开的至少一个实施例中。此外，请注意，这里“在一个实施例中”的词语例子不一定全指同一个实施例。
在此处所提供的说明书中，说明了大量具体细节。然而，能够理解，本公开的实施例可以在没有这些具体细节的情况下被实践。在一些实例中，并未详细示出公知的方法、结构和技术，以便不模糊对本说明书的理解。
在权利要求中，不应将位于括号之间的任何参考符号构造成对权利要求的限制。单词“包含”不排除存在未列在权利要求中的元件或步骤。位于元件之前的单词“一”或“一个”不排除存在多个这样的元件。本公开可以借助于包括有若干不同元件的硬件以及借助于适当编程的计算机来实现。在列举了若干装置的单元权利要求中，这些装置中的若干个可以是通过同一个硬件项来具体体现。单词第一、第二、以及第三等的使用不表示任何顺序。可将这些单词解释为名称。
最后应说明的是：以上实施例仅用以说明本公开的技术方案，而非对其限制；尽管参照前述实施例对本公开进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本公开各实施例技术方案的精神和范围。

Claims (9)

  1. 一种汇流条，其特征在于，包括：可相对折叠的第一翻折部和第二翻折部；其中，
    所述第一翻折部的一端和所述第二翻折部的一端相连；
    所述第一翻折部包括：导电基板和第一导电胶膜，所述导电基板上贴合有所述第一导电胶膜；
    所述第二翻折部包括防护基板和第二导电胶膜，所述防护基板上贴合有所述第二导电胶膜。
  2. 根据权利要求1所述的汇流条，其特征在于，所述导电基板靠近所述第二翻折部的一面贴合有所述第一导电胶膜；
    所述防护基板靠近所述第一翻折部的一面贴合有所述第二导电胶膜。
  3. 根据权利要求1所述的汇流条，其特征在于，所述第一翻折部的一端和所述第二翻折部的一端通过所述第一导电胶膜和所述第二导电胶膜相连。
  4. 根据权利要求1所述的汇流条，其特征在于，所述导电基板为铜箔基板，所述防护基板为PET板或铜箔基板，所述第一导电胶膜、所述第二导电胶膜均为粘合剂和导电颗粒的结合体。
  5. 根据权利要求4所述的汇流条，其特征在于，所述粘合剂为亚敏导电胶或亚克力胶，所述导电颗粒为银粉颗粒。
  6. 根据权利要求1所述的汇流条，其特征在于，所述导电基板的厚度为0.1-1mm，所述第一翻折部的厚度为0.15-1.5mm；
    所述防护基板的厚度为0.1-1mm，所述第二翻折部的厚度为0.15-1.5mm。
  7. 一种光伏组件，其特征在于，包括：电池串、焊带、如权利要求1-6任一项所述的汇流条；其中，
    所述焊带的一端与所述电池串的端部连接，所述焊带的另一端与所述汇流条粘接连接。
  8. 根据权利要求7所述的光伏组件，其特征在于，所述焊带为打孔焊带。
  9. 一种电池串的连接方法，所述电池串是权利要求7-8任一项所述的光伏组件中的电池串，其特征在于，所述连接方法包括：
    连接电池串和焊带的边缘部分；其中，一个所述电池串的一端连接一个所述焊带；
    在常温条件下，将多个所述焊带顺次粘接连接在汇流条的第一翻折部或第二翻折部上；
    相对折叠所述第一翻折部和所述第二翻折部，以使多个所述焊带均与所述第一翻折部和所述第二翻折部粘接连接，以连接多个所述电池串。
PCT/CN2020/131857 2020-07-08 2020-11-26 汇流条、光伏组件及电池串的连接方法 WO2022007313A1 (zh)

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