CN111168270A - Series welding method suitable for HIT - Google Patents

Series welding method suitable for HIT Download PDF

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Publication number
CN111168270A
CN111168270A CN202010093430.8A CN202010093430A CN111168270A CN 111168270 A CN111168270 A CN 111168270A CN 202010093430 A CN202010093430 A CN 202010093430A CN 111168270 A CN111168270 A CN 111168270A
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CN
China
Prior art keywords
welding
method suitable
hit
battery piece
main grid
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.)
Pending
Application number
CN202010093430.8A
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Chinese (zh)
Inventor
谷士斌
周学谦
蔡涔
任明冲
张莹
黄强
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.)
Dongfang Risheng Changzhou New Energy Co ltd
Original Assignee
Dongfang Risheng Changzhou New Energy Co ltd
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
Application filed by Dongfang Risheng Changzhou New Energy Co ltd filed Critical Dongfang Risheng Changzhou New Energy Co ltd
Priority to CN202010093430.8A priority Critical patent/CN111168270A/en
Publication of CN111168270A publication Critical patent/CN111168270A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
    • B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
    • B23K37/0426—Fixtures for other work
    • B23K37/0435—Clamps
    • B23K37/0443—Jigs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/042—PV modules or arrays of single PV cells
    • H01L31/05—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
    • H01L31/0504—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/36—Electric or electronic devices
    • 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

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

Abstract

The invention provides a series welding method suitable for HIT (heterojunction with intrinsic thin layer), belonging to the technical field of photovoltaic cell manufacturing. The method comprises the steps of pressing a tool clamp on a battery piece, exposing a main grid line on the battery piece, placing a welding strip on the main grid line, and welding the welding strip and the main grid line by using a welding head. The arrangement of the tooling fixture can avoid damage to other parts of the battery piece in the welding process and damage to the battery surface structure.

Description

Series welding method suitable for HIT
Technical Field
The invention belongs to the technical field of photovoltaic cell manufacturing, and relates to a series welding method suitable for HIT.
Background
In recent years, solar cell production technology is continuously improved, production cost is continuously reduced, conversion efficiency is continuously improved, and photovoltaic power generation is increasingly widely applied and becomes an important energy source for power supply. At present, low cost and high efficiency become targets pursued by various photovoltaic manufacturers, and the silicon heterojunction battery technology is a novel high-efficiency battery technology. The HIT cell combines the advantages of thin film and crystalline silicon photovoltaic technologies, and is the leading technology which occupies the highest performance in the crystalline silicon cell and has the best power generation effect in all commercial cells at present. Compared with the high temperature of about 1000 ℃ in the crystal silicon process, the HIT only needs about 200 ℃, so that the energy consumption in the production process is greatly reduced, and the energy-saving characteristic is remarkable.
All the processes of the HIT are prepared by adopting low-temperature processes, the integral temperature resistance of the HIT battery is poor, and if the temperature is too high in the processing process, the battery structure can be damaged, and the battery efficiency can be responded.
The existing welding technology mostly adopts an infrared lamp tube to integrally heat the battery, and heating the whole battery piece wastes energy and influences the performance of the HIT battery.
Disclosure of Invention
The invention aims to solve the problems and provides a series welding method suitable for HIT.
In order to achieve the purpose, the invention adopts the following technical scheme:
a series welding method suitable for HIT is characterized in that a tooling fixture is pressed on a battery piece, a main grid line on the battery piece is exposed, a welding strip is placed on the main grid line, and the welding strip and the main grid line are welded by a welding head.
Further, the tool fixture comprises a tool body matched with the battery piece, a plurality of welding grooves in one-to-one correspondence with the main grid lines are formed in the tool body, the welding grooves penetrate through the upper surface and the lower surface of the tool body, when the tool fixture is pressed on the battery piece, the main grid lines on the battery piece are exposed through the welding grooves, and the rest parts of the battery piece are covered by the tool body.
Further, the welding grooves are evenly arranged at intervals, two ends of each welding groove are closed, each welding head comprises a plurality of welding head portions evenly arranged at intervals, and the welding head portions are identical to the welding grooves in number and correspond to the welding grooves in a one-to-one mode.
Furthermore, the cross section of the welding head part is triangular, and the bottom angle of the triangle is 30-75 degrees.
Furthermore, the cross section of the welding head part is triangular, and the bottom angle of the triangle is 40-60 degrees.
Furthermore, the welding head is controlled by a PID temperature control system.
Furthermore, a temperature sensor connected with a PID temperature control system is arranged on the welding head, and the temperature control precision is within +/-2 ℃.
Further, the tool body is rectangular, and the welding groove is rectangular.
Furthermore, in the welding process, the temperature of the welding head is changed, so that the reflection stripes are formed on the surface of the welding strip.
Furthermore, the welding head adopts thermal resistance heating or semiconductor heating.
In the present application, HIT is an abbreviation for Heterojunctionwith Intrasic Thin-layer, i.e., heterojunction solar cell; CTM: the packaging of the cell to the module is lost.
Compared with the prior art, the invention has the advantages that:
1. due to the arrangement of the tool clamp, damage to other parts of the battery piece in the welding process can be avoided, and damage to the battery surface structure is avoided.
2. By changing the welding temperature and accurately controlling the welding temperature, the surface of the welding strip forms a reflection stripe, and the shape can enable light reflected on the welding strip to be reflected back to the surface of the battery piece through glass, so that the performance of the assembly is improved, the CTM of the assembly is reduced, and the efficiency of the assembly is improved.
3. Through the cooperation of soldered connection and welding groove, can once only weld and accomplish a battery piece, provide frock efficiency, reduce energy loss.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a schematic view of a weld head;
FIG. 2 is a schematic view of a tooling fixture;
FIG. 3 is another schematic view of a tooling fixture;
figure 4 is a schematic diagram of the operation of the present invention.
In the figure: the welding fixture comprises a fixture clamp 1, a welding head 2, a fixture body 3, a welding groove 4, a welding head part 5, a welding strip 100 and a battery piece 101.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 4, in a series welding method suitable for HIT, a tooling fixture 1 is pressed on a battery piece 101 to expose a main grid line on the battery piece, a welding strip 100 is placed on the main grid line, and the welding strip 100 and the main grid line are welded by a welding head 2. Contact heating is adopted in the welding process.
In the welding process, due to the shielding of the tool clamp 1, the battery piece 101 only exposes the main grid line to be welded, the welding of the welding strip and the main grid line is ensured, the contact between other parts of the battery piece and the welding head 2 is avoided, and the damage to the battery surface structure is avoided.
As shown in fig. 2 and 3, the tooling fixture 1 includes a fixture body 3 matched with the battery piece, the fixture body 3 is provided with a plurality of welding grooves 4 corresponding to the main grid lines one by one, the welding grooves 4 penetrate through the upper and lower surfaces of the fixture body 3, when the tooling fixture 1 is pressed on the battery piece, the main grid lines on the battery piece are exposed through the welding grooves 4, and the rest of the battery piece is covered by the fixture body.
It can be understood that the welding groove 4 is formed by digging a plurality of hollowed-out grooves on the tool body 3, and the tool body 3 is made of a heat insulating material, such as polytetrafluoroethylene. It fits to be located the battery piece, and frock body 3 sets up to be the rectangle form, and welding groove 4 also is the rectangle, fits with the main grid line.
It should also be understood by those skilled in the art that the size of the fixture body 3 is suitable for different battery plates, the size is not limited, and the number of the welding grooves 4 is also suitable for the number of the main grid lines on the battery plates, so that when different battery plates are welded, the number of the welding grooves 4 is different.
In this embodiment, the even setting in welding groove 4 interval, and the both ends of welding groove 4 are the closure form, combine fig. 1 to show, soldered connection 2 includes the even welding head portion 5 that sets up in a plurality of interval, and the bottom of welding head portion 5 flushes, welding head portion 5 the same and the one-to-one with welding groove 4 quantity to guarantee can once only weld and accomplish, improve work efficiency. It should be understood by those skilled in the art that the number of the welding head portions 5 is different for different tool bodies 3, but the number and the positions of the welding head portions and the welding grooves are required to be the same.
The welding head can be set according to the actual conditions of the process, and in the embodiment, the section of the welding head 5 is triangular, and the angle of the base angle of the triangle is between 30 and 75 degrees. Preferably, the base angle of the triangle is between 40-60 °. In the welding process, the temperature of the welding head 2 is changed, so that the reflection stripes are formed on the surface of the welding strip. The appearance can enable light reflected on the welding strips to be reflected back to the surface of the battery piece through the glass, and the performance of the assembly is improved.
In the present embodiment, the bonding head is heated by thermal resistance or semiconductor heating, and the bonding head is controlled by a PID temperature control system. The welding head is provided with a temperature sensor connected with a PID temperature control system, and the temperature control precision is within +/-2 ℃. The precise control of the temperature is also to ensure that reflective striations are formed during the soldering process.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit of the invention.

Claims (10)

1. A series welding method suitable for HIT is characterized in that a tooling fixture (1) is pressed on a battery piece, a main grid line on the battery piece is exposed, a welding strip is placed on the main grid line, and the welding strip and the main grid line are welded through a welding head (2).
2. The series welding method suitable for the HIT according to claim 1, wherein the tooling fixture (1) comprises a tooling body (3) matched with the battery piece, a plurality of welding grooves (4) corresponding to the main grid lines in a one-to-one mode are formed in the tooling body (3), the welding grooves (4) penetrate through the upper surface and the lower surface of the tooling body (3), when the tooling fixture (1) is pressed on the battery piece, the main grid lines on the battery piece are exposed through the welding grooves (4), and the rest part of the battery piece is covered by the tooling body.
3. A series welding method suitable for HIT according to claim 2, characterized in that the welding grooves (4) are arranged at even intervals, both ends of the welding grooves (4) are closed, the welding head (2) comprises a plurality of welding heads (5) which are arranged at even intervals, and the welding heads (5) are the same in number and correspond to the welding grooves (4) one by one.
4. A series welding method suitable for HIT according to claim 3, characterized in that the cross section of the welding head (5) is triangular, and the angle of the base angle of the triangle is between 30-75 °.
5. A series welding method suitable for HIT according to claim 3, characterized in that the cross section of the welding head (5) is triangular, and the angle of the base angle of the triangle is between 40-60 °.
6. A method of stringer according to claim 1 and adapted for HIT, wherein said bonding head is controlled using a PID temperature control system.
7. A series welding method suitable for HIT according to claim 6, wherein the welding head is provided with a temperature sensor connected with a PID temperature control system, and the temperature control precision is within +/-2 ℃.
8. A series welding method suitable for HIT according to claim 2, characterized in that the tool body (3) is rectangular, and the welding groove (4) is rectangular.
9. A series welding method suitable for HIT according to claim 1, characterized in that, during welding, the temperature of the welding head (2) is changed to form reflection stripes on the surface of the welding strip.
10. A series welding method suitable for HIT as claimed in claim 1, wherein the welding head is heated by thermal resistance or semiconductor heating.
CN202010093430.8A 2020-02-14 2020-02-14 Series welding method suitable for HIT Pending CN111168270A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010093430.8A CN111168270A (en) 2020-02-14 2020-02-14 Series welding method suitable for HIT

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Application Number Priority Date Filing Date Title
CN202010093430.8A CN111168270A (en) 2020-02-14 2020-02-14 Series welding method suitable for HIT

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CN111168270A true CN111168270A (en) 2020-05-19

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202004027U (en) * 2011-04-30 2011-10-05 常州天合光能有限公司 Solar battery module and welding tool for welding solder strip of module
CN202539866U (en) * 2012-03-09 2012-11-21 嘉兴优太太阳能有限公司 Solar battery welding template
CN202667866U (en) * 2012-06-20 2013-01-16 常州天合光能有限公司 Solar energy photovoltaic battery welding template
CN203738184U (en) * 2014-03-14 2014-07-30 河源市中晶太阳能技术有限公司 Welding machine for single solar cell
CN104600158A (en) * 2015-01-13 2015-05-06 福建铂阳精工设备有限公司 Interconnection method of crystalline silicon battery assembly
CN204577445U (en) * 2015-01-28 2015-08-19 印冰 Reflective solder strip
CN105081626A (en) * 2015-07-23 2015-11-25 晶科能源有限公司 Auxiliary welding device and welding method for solar cell
CN105689927A (en) * 2016-01-28 2016-06-22 青岛瑞元鼎泰新能源科技有限公司 Welding table top and welding process
CN110076456A (en) * 2019-05-29 2019-08-02 浙江晶科能源有限公司 A kind of photovoltaic welder, photovoltaic module manufacturing equipment and solar battery

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202004027U (en) * 2011-04-30 2011-10-05 常州天合光能有限公司 Solar battery module and welding tool for welding solder strip of module
CN202539866U (en) * 2012-03-09 2012-11-21 嘉兴优太太阳能有限公司 Solar battery welding template
CN202667866U (en) * 2012-06-20 2013-01-16 常州天合光能有限公司 Solar energy photovoltaic battery welding template
CN203738184U (en) * 2014-03-14 2014-07-30 河源市中晶太阳能技术有限公司 Welding machine for single solar cell
CN104600158A (en) * 2015-01-13 2015-05-06 福建铂阳精工设备有限公司 Interconnection method of crystalline silicon battery assembly
CN204577445U (en) * 2015-01-28 2015-08-19 印冰 Reflective solder strip
CN105081626A (en) * 2015-07-23 2015-11-25 晶科能源有限公司 Auxiliary welding device and welding method for solar cell
CN105689927A (en) * 2016-01-28 2016-06-22 青岛瑞元鼎泰新能源科技有限公司 Welding table top and welding process
CN110076456A (en) * 2019-05-29 2019-08-02 浙江晶科能源有限公司 A kind of photovoltaic welder, photovoltaic module manufacturing equipment and solar battery

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Application publication date: 20200519