WO2023103971A1 - Cellule - Google Patents

Cellule Download PDF

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Publication number
WO2023103971A1
WO2023103971A1 PCT/CN2022/136623 CN2022136623W WO2023103971A1 WO 2023103971 A1 WO2023103971 A1 WO 2023103971A1 CN 2022136623 W CN2022136623 W CN 2022136623W WO 2023103971 A1 WO2023103971 A1 WO 2023103971A1
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WO
WIPO (PCT)
Prior art keywords
battery sheet
line
pad
auxiliary
grid lines
Prior art date
Application number
PCT/CN2022/136623
Other languages
English (en)
Chinese (zh)
Inventor
陈红
朱强忠
冯志强
卞强
Original Assignee
天合光能股份有限公司
天合光能（常州）科技有限公司
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 天合光能股份有限公司, 天合光能（常州）科技有限公司 filed Critical 天合光能股份有限公司
Publication of WO2023103971A1 publication Critical patent/WO2023103971A1/fr

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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
    • H01L31/0224—Electrodes
    • 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
    • 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 application relates to the technical field of battery equipment, in particular to a battery sheet.
  • Aluminum wires are generally used as the main grid on the back of the cell, and silver paste pads (pads) are superimposed on the main grid to connect with the soldering strips.
  • the main grid wires mainly play the role of collecting current.
  • the disadvantage of this solution is: during the welding process, both the busbar and the pad points are connected to the solder strips. Due to the height difference between the busbar lines and the pad points, this makes welding more difficult.
  • the welding It is not easy to form a good ohmic contact between the ribbon and the aluminum, resulting in a decrease in the CTM value of the module (Cell To Module, the percentage of the output power of the module and the total power of the cell).
  • the purpose of the present application is to propose a battery sheet, the welding ribbon of the battery sheet is more convenient, and the CTM value is higher.
  • a battery sheet comprising: main grid lines; pads, the pads are used to connect ribbons, and both sides of the pads are provided with the main grid lines; connecting grid lines, the The connecting grid lines are spaced apart from the pads, and the connecting grid lines are connected to the solder strips; the size of the connecting grid lines along the length direction of the main grid lines is smaller than that of the pads along the main grid The dimension in the length direction of the line; the sub-gate line, the sub-gate line is connected to the side of the main gate line away from the pad and the connecting gate line.
  • the battery sheet further includes an auxiliary grid line, the auxiliary grid line is spaced apart from the connection grid line, and the two ends of the auxiliary grid line are respectively connected to the two main grid lines,
  • the material of the auxiliary grid lines is the same as that of the auxiliary grid lines.
  • a first hollow structure is provided on the passivation layer of the battery sheet at a position corresponding to the auxiliary gate line.
  • the auxiliary grid lines are located in the middle of the main grid lines.
  • a second hollow structure is provided on the passivation layer of the battery sheet at a position corresponding to the sub-gate line.
  • the dimension of the connecting gate line along the width direction of the main gate line is smaller than the dimension of the pad along the width direction of the main gate line.
  • the dimension of the connecting gate line along the width direction of the main gate line decreases gradually.
  • the two main gate lines connected to both sides of the pad are arranged in parallel.
  • connection gate lines distributed at intervals are arranged between two adjacent pads.
  • the main grid lines of the battery sheet are located on both sides of the pad, and the pad is also provided with a connecting grid line between the two main grid lines, and there is no height between the main grid line and the pad Poor, very convenient for soldering, and the ribbon and the pad can form a good ohmic contact, thereby improving the CTM value of the cell, and connecting the grid wire can improve the connection strength between the cell and the ribbon.
  • FIG. 1 is a schematic structural view of a battery sheet in Example 1 of the present application.
  • Fig. 2 is a schematic structural view of the battery sheet of Example 2 of the present application.
  • Fig. 3 is a schematic structural diagram of a battery sheet according to Example 3 of the present application.
  • Fig. 4 is a schematic structural diagram of a battery sheet according to Example 4 of the present application.
  • Fig. 5 is a schematic structural view of the battery sheet of Example 5 of the present application.
  • Fig. 6 is a schematic structural diagram of a battery sheet according to Example 6 of the present application.
  • Fig. 7 is a schematic diagram of the flow of electrons on the battery sheet in the embodiment of the present application.
  • connection should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application in specific situations.
  • a battery sheet of the present application includes a main grid line 1 , pads 2 , connecting grid lines 3 and auxiliary grid lines 4 .
  • the pad 2 is used to connect the solder strip
  • the busbar 1 is provided on both sides of the pad 2 .
  • the connecting grid lines 3 are spaced apart from the pads 2, and the connecting grid lines 3 are connected to the welding strips.
  • the size of the connection gate line 3 along the length direction of the busbar line 1 is smaller than the size of the pad 2 along the length direction of the busbar line 1 .
  • the auxiliary gate line 4 is connected to the side of the main gate line 1 away from the pad 2 and the connection gate line 3 .
  • connection grid line 3 between the two main grid lines 1 , and the connection grid line 3 is connected to the welding strip, so that the connection strength between the battery sheet and the welding strip can be improved through the connection grid line 3 .
  • the main grid line 1 is an aluminum grid line
  • the pad 2 is a silver paste pad
  • the connection grid line 3 is a silver grid line
  • the auxiliary grid line is an aluminum grid line.
  • the length and width of the silver paste pad points need to be relatively large, which will increase the silver consumption in the production process of the battery sheet, thereby improving the performance of the battery.
  • the cost of sheet, in the present embodiment, owing to be connected with welding ribbon except pad 2 also has the connection gate line 3 between main grid line 1, compared with prior art only adopts silver paste pad point and welding ribbon
  • the battery sheet of this embodiment can use less silver paste to achieve firm welding of the ribbon and the sheet, which reduces the silver consumption of the battery sheet, thereby reducing the manufacturing cost of the battery sheet.
  • the battery sheet further includes auxiliary grid lines 5 , which are arranged at intervals from the connecting grid lines 3 , and the two ends of the auxiliary grid lines 5 are connected to the two main grid lines respectively.
  • Line 1 is connected.
  • the material of the auxiliary grid lines 5 is the same as that of the auxiliary grid lines 4 , both of which are aluminum grid lines.
  • the aluminum grid lines on the battery sheet are used to collect current. If there are only pads 2 and connecting grid lines 3 between the two main grid lines 1, then the electrons between the two main grid lines 1 It is necessary to flow to the area outside the main gate line 1 from the sub gate line 4 to the main gate line 1 . This prolongs the electron transmission path, which is not conducive to the improvement of the working efficiency of the battery sheet. As shown in FIG.
  • an auxiliary grid line 5 is provided between the two main grid lines 1 , and electrons between the two main grid lines 1 can flow directly from the auxiliary grid lines 5 to the main grid lines 1 .
  • the arrowed solid line illustrates the current path when the auxiliary gate line 5 is present.
  • the passivation layer of the battery sheet is provided with a first hollow structure at a position corresponding to the auxiliary gate line 5 .
  • the auxiliary gate line 5 can pass through the first hollow structure and be electrically connected to the emitter. It can be understood that the first hollow structure reduces the electron transmission distance on the back of the cell (electrons enter the auxiliary gate line 5 through the first hollow structure), thereby reducing series resistance loss and improving efficiency.
  • the auxiliary gate line 5 is located in the middle of the main gate line 1 .
  • the electrons between the two main grid lines 1 can flow from the auxiliary grid line 5 to the main grid line 1 faster, thereby improving the efficiency of the battery sheet.
  • the auxiliary gate line 5 can be arranged at any position between the two main gate lines 1 as required, and is not limited to the middle position in this embodiment.
  • the middle position of the busbar 1 in this application refers to the area near the midpoint in the length direction of the busbar 1, which can be understood as the area between the two ends of the busbar 1 in the length direction and close to the midpoint. .
  • the number of auxiliary gate lines 5 may be different, such as one, two, three and so on.
  • the plurality of auxiliary gate lines 5 are arranged at intervals along the length direction of the main gate lines 1 .
  • the passivation layer of the battery sheet is provided with a second hollow structure at a position corresponding to the sub-gate line 4 .
  • the sub-gate line 4 can pass through the second hollow structure and be electrically connected to the emitter. It can be understood that the second hollow structure is used to reduce the electron transmission distance on the back of the cell, thereby reducing the series resistance loss and improving efficiency.
  • the dimension of the connecting gate line 3 along the width direction of the main gate line 1 is smaller than the dimension of the pad 2 along the width direction of the main gate line 1 . Therefore, on the premise of ensuring the stable connection between the battery sheet and the welding ribbon, the silver consumption in the production process of the battery sheet can be reduced, thereby reducing the manufacturing cost of the battery sheet.
  • the size of the connection gate line 3 along the width direction of the main gate line 1 decreases gradually. Therefore, on the premise of ensuring the stable connection between the battery sheet and the welding ribbon, the silver consumption in the production process of the battery sheet can be reduced, thereby reducing the manufacturing cost of the battery sheet.
  • two main gate lines 1 connected to both sides of the pad 2 are arranged in parallel. Therefore, the busbar 1 can be printed on the battery sheet very conveniently, which reduces the difficulty of manufacturing the battery sheet, thereby reducing the production cost of the battery sheet.
  • the relative positional relationship of the two main gate lines 1 connected to both sides of the pad 2 can be arbitrarily selected according to actual needs, and is not limited to the parallel relationship in this embodiment.
  • a plurality of connecting gate lines 3 distributed at intervals are arranged between two adjacent pads 2 . Therefore, on the premise of ensuring the stable connection between the battery sheet and the welding ribbon, the silver consumption in the production process of the battery sheet can be reduced, thereby reducing the manufacturing cost of the battery sheet.
  • the battery sheet includes main grid lines 1 , pads 2 , connecting grid lines 3 and auxiliary grid lines 4 .
  • the pad 2 is used to connect the solder strip
  • the busbar 1 is provided on both sides of the pad 2 .
  • the connecting grid lines 3 are spaced apart from the pads 2, and the connecting grid lines 3 are connected to the welding strips.
  • the dimension of the connecting gate line 3 along the length direction of the main gate line 1 is smaller than the dimension of the pad 2 along the length direction of the main gate line 1 .
  • the auxiliary gate line 4 is connected to the side of the main gate line 1 away from the pad 2 and the connection gate line 3 .
  • the battery sheet includes main grid lines 1 , pads 2 , connecting grid lines 3 , auxiliary grid lines 4 and auxiliary grid lines 5 .
  • the pad 2 is used to connect the soldering strip, and the two sides of the pad 2 are provided with bus bars 1 .
  • the connecting grid lines 3 are spaced apart from the pads 2, and the connecting grid lines 3 are connected to the welding strips.
  • the size of the connection gate line 3 along the length direction of the busbar line 1 is smaller than the size of the pad 2 along the length direction of the busbar line 1 .
  • the auxiliary gate line 4 is connected to the side of the main gate line 1 away from the pad 2 and the connection gate line 3 .
  • the auxiliary grid lines 5 are spaced apart from the connection grid lines 3 , and both ends of the auxiliary grid lines 5 are respectively connected to the two main grid lines 1 .
  • the battery sheet includes main grid lines 1 , pads 2 , connecting grid lines 3 , auxiliary grid lines 4 and auxiliary grid lines 5 .
  • the pad 2 is used to connect the soldering strip, and the two sides of the pad 2 are provided with bus bars 1 .
  • the connecting grid lines 3 are spaced apart from the pads 2, and the connecting grid lines 3 are connected to the welding strips.
  • the size of the connection grid line 3 along the length direction of the busbar line 1 is smaller than the size of the pad 2 along the length direction of the busbar line 1; The dimension in the width direction of line 1.
  • the auxiliary gate line 4 is connected to the side of the main gate line 1 away from the pad 2 and the connection gate line 3 .
  • the auxiliary grid lines 5 are spaced apart from the connection grid lines 3 , and both ends of the auxiliary grid lines 5 are respectively connected to the two main grid lines 1 .
  • the battery sheet includes main grid lines 1 , pads 2 , connecting grid lines 3 , auxiliary grid lines 4 and auxiliary grid lines 5 .
  • the pad 2 is used to connect the soldering strip, and the two sides of the pad 2 are provided with bus bars 1 .
  • the connecting grid lines 3 are spaced apart from the pads 2, and the connecting grid lines 3 are connected to the welding strips.
  • the size of the connecting grid line 3 along the length direction of the busbar line 1 is smaller than the size of the pad 2 along the length direction of the busbar line 1, and the size of the connecting grid line 3 along the width direction of the busbar line 1 is smaller than that of the pad 2 along the length direction of the busbar line.
  • the auxiliary gate line 4 is connected to the side of the main gate line 1 away from the pad 2 and the connection gate line 3 .
  • the auxiliary grid lines 5 are spaced apart from the connection grid lines 3 , and both ends of the auxiliary grid lines 5 are respectively connected to the two main grid lines 1 . In the direction from the two ends of the busbar 1 towards the middle, the distance between the two busbars 1 decreases gradually.
  • the battery sheet includes main grid lines 1 , pads 2 , connecting grid lines 3 , auxiliary grid lines 4 and auxiliary grid lines 5 .
  • the pad 2 is used to connect the soldering strip, and the two sides of the pad 2 are provided with bus bars 1 .
  • each busbar 1 is formed in a curved shape.
  • the connecting grid lines 3 are spaced apart from the pads 2, and the connecting grid lines 3 are connected to the welding strips.
  • the size of the connecting grid line 3 along the length direction of the busbar line 1 is smaller than the size of the pad 2 along the length direction of the busbar line 1, and the size of the connecting grid line 3 along the width direction of the busbar line 1 is smaller than that of the pad 2 along the length direction of the busbar line.
  • the auxiliary gate line 4 is connected to the side of the main gate line 1 away from the pad 2 and the connection gate line 3 .
  • the auxiliary grid lines 5 are spaced apart from the connection grid lines 3 , and both ends of the auxiliary grid lines 5 are respectively connected to the two main grid lines 1 .
  • the battery sheet includes main grid lines 1 , pads 2 , connecting grid lines 3 , auxiliary grid lines 4 and auxiliary grid lines 5 .
  • the pad 2 is used to connect the soldering strip, and the two sides of the pad 2 are provided with bus bars 1 .
  • each busbar 1 is formed in a curved shape, and the ends of the busbars 1 are respectively connected.
  • the connecting grid lines 3 are spaced apart from the pads 2, and the connecting grid lines 3 are connected to the welding strips.
  • the size of the connecting grid line 3 along the length direction of the busbar line 1 is smaller than the size of the pad 2 along the length direction of the busbar line 1, and the size of the connecting grid line 3 along the width direction of the busbar line 1 is smaller than that of the pad 2 along the length direction of the busbar line.
  • the auxiliary gate line 4 is connected to the side of the main gate line 1 away from the pad 2 and the connection gate line 3 .
  • the auxiliary grid lines 5 are spaced apart from the connection grid lines 3 , and both ends of the auxiliary grid lines 5 are respectively connected to the two main grid lines 1 .

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  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

La présente invention concerne une cellule. La cellule comprend des lignes de grille principales (1), des plots de connexion (2), des lignes de grille de connexion (3) et des lignes de grille secondaires (4). Les plots de connexion (2) sont utilisés pour connecter des bandes de soudure, et les deux côtés des plots de connexion (2) comportent des lignes de grille principales (1) ; les lignes de grille de connexion (3) et les plots de connexion (2) sont disposés à des intervalles et les lignes de grille de connexion (3) sont reliées aux bandes de soudure ; la taille de chaque ligne de grille de connexion (3) le long du sens de la longueur de chaque ligne de grille principale (1) est inférieure à la taille de chaque plot de connexion (2) le long du sens de la longueur de la ligne de grille principale (1) ; les lignes de grille secondaires (4) sont reliées à un côté de la ligne de grille principale (1) opposé aux plots de connexion (2) et aux lignes de grille de connexion (3). Le brasage des bandes de soudure de la cellule est pratique, et une valeur CTM est grande.
PCT/CN2022/136623 2021-12-06 2022-12-05 Cellule WO2023103971A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202123044388.XU CN216389392U (zh) 2021-12-06 2021-12-06 一种电池片
CN202123044388.X 2021-12-06

Publications (1)

Publication Number Publication Date
WO2023103971A1 true WO2023103971A1 (fr) 2023-06-15

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PCT/CN2022/136623 WO2023103971A1 (fr) 2021-12-06 2022-12-05 Cellule

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WO (1) WO2023103971A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117936606A (zh) * 2024-03-21 2024-04-26 晶科能源(海宁)有限公司 太阳能电池及光伏组件

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN216389392U (zh) * 2021-12-06 2022-04-26 天合光能股份有限公司 一种电池片

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203351613U (zh) * 2013-07-16 2013-12-18 保定天威英利新能源有限公司 太阳能电池片的栅线电极、太阳能电池片和太阳能电池板
CN203423196U (zh) * 2013-09-06 2014-02-05 英利集团有限公司 一种太阳能电池组件及其太阳能电池片
CN208189601U (zh) * 2018-06-11 2018-12-04 泰州隆基乐叶光伏科技有限公司 一种多主栅电池的正面主栅结构及太阳能电池
CN214956898U (zh) * 2021-07-08 2021-11-30 天合光能股份有限公司 一种降低银耗的电池片
CN216389392U (zh) * 2021-12-06 2022-04-26 天合光能股份有限公司 一种电池片

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203351613U (zh) * 2013-07-16 2013-12-18 保定天威英利新能源有限公司 太阳能电池片的栅线电极、太阳能电池片和太阳能电池板
CN203423196U (zh) * 2013-09-06 2014-02-05 英利集团有限公司 一种太阳能电池组件及其太阳能电池片
CN208189601U (zh) * 2018-06-11 2018-12-04 泰州隆基乐叶光伏科技有限公司 一种多主栅电池的正面主栅结构及太阳能电池
CN214956898U (zh) * 2021-07-08 2021-11-30 天合光能股份有限公司 一种降低银耗的电池片
CN216389392U (zh) * 2021-12-06 2022-04-26 天合光能股份有限公司 一种电池片

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117936606A (zh) * 2024-03-21 2024-04-26 晶科能源(海宁)有限公司 太阳能电池及光伏组件

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