WO2021120655A1 - Structure d'assemblage de cellules double face - Google Patents

Structure d'assemblage de cellules double face Download PDF

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Publication number
WO2021120655A1
WO2021120655A1 PCT/CN2020/110079 CN2020110079W WO2021120655A1 WO 2021120655 A1 WO2021120655 A1 WO 2021120655A1 CN 2020110079 W CN2020110079 W CN 2020110079W WO 2021120655 A1 WO2021120655 A1 WO 2021120655A1
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WO
WIPO (PCT)
Prior art keywords
battery
double
assembly structure
sided
cell
Prior art date
Application number
PCT/CN2020/110079
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English (en)
Chinese (zh)
Inventor
曹明杰
汪浩楠
邓伟
杨楚峰
Original Assignee
杭州福斯特应用材料股份有限公司
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Publication of WO2021120655A1 publication Critical patent/WO2021120655A1/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
    • H01L31/022408—Electrodes for devices characterised by at least one potential jump barrier or surface barrier
    • H01L31/022425—Electrodes for devices characterised by at least one potential jump barrier or surface barrier for solar cells
    • 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
    • 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 invention relates to the field of photovoltaic technology, in particular to a double-sided battery module structure.
  • shingled modules which cut the whole cell into multiple pieces by laser and mechanical means.
  • the pieces are interconnected by overlapping, and the overlapping area is electrically conductive.
  • the glue realizes the electrical connection of the upper and lower battery slices.
  • This method can eliminate the blank area between the cells of the conventional module, effectively utilize the module area, reduce the current and reduce the resistance loss, and has a great advantage in the power of the module.
  • the sheets are connected by lap joints, and all the cells are not on the same plane. There is a risk of cracking and fragmentation during lamination. At the same time, the overlap area will be blocked and part of the current will be lost.
  • the main purpose of the present invention is to provide a double-sided battery assembly structure to solve the problem that the double-sided battery assembly structure in the prior art cannot avoid overlapping and shielding while effectively using the area of the component.
  • a double-sided battery assembly structure which includes at least one set of battery strings formed by connecting multiple battery pieces.
  • the double-sided battery assembly structure further includes The grid lines on the surface. In the same battery string, the grid lines on the adjacent battery slices are on the same plane, and in the extension direction of the battery string, the grid lines on the previous battery slice and the next battery slice are on the same plane.
  • the gate line is connected.
  • the double-sided battery assembly structure includes a first electrode and a second electrode oppositely arranged on both sides of each battery piece, the surface provided with the first electrode is the first working surface of the battery piece, and the first electrode has a first electrode A grid line, the surface provided with the second electrode is the second working surface of the battery sheet, and the second electrode has a second grid line.
  • the first working surface of each battery sheet is adjacent to the The second working surface of the battery slice is located on the same plane, and the first grid line on the previous battery slice and the second grid line on the latter battery slice are on the same straight line and connected.
  • each cell has a first end and a second end opposite to each other.
  • the first grid line is located at the first end
  • the second grid line is located at the second end
  • the first grid line and the second grid are located at the second end. The line deviates from the setting.
  • first gate line and the second gate line are both main gate lines.
  • the extending directions of the first grid line and the second grid line are both the long side direction of the battery sheet.
  • each battery piece has the same size.
  • the double-sided battery assembly structure includes a plurality of battery strings, and the battery slices in each adjacent battery string are correspondingly arranged.
  • the number of battery pieces in each battery string is the same.
  • the grid lines on the previous battery slice and the grid lines on the next battery slice are connected by a solder ribbon or a conductive film.
  • the conductive film is a resin layer with a conductive medium
  • the conductive medium is conductive particles and/or conductive filaments.
  • the double-sided battery assembly structure further includes an encapsulation film, the encapsulation film wraps the battery string, and the conductive film is compounded on the encapsulation film.
  • a double-sided battery assembly structure which includes at least one battery string formed by connecting multiple battery pieces.
  • the double-sided battery assembly structure also includes grid lines arranged on the surface of each battery piece.
  • the grid lines on the adjacent battery slices are on the same plane, and in the extension direction of the battery string, the grid lines on the previous battery slice are connected to the grid lines on the next battery slice. Because the grid lines connecting adjacent cells in the above arrangement are located on the same plane, components such as solder ribbons do not need to pass through the area between the adjacent cells to achieve the connection between the two, which can shorten the length of the two cells. The distance between the two or directly adjacent to the cell, to achieve full utilization of the module area.
  • FIG. 1 shows a schematic side view of a part of the battery sheet in the double-sided battery assembly structure provided by the embodiment of the present application;
  • FIG. 2 shows a schematic diagram of the arrangement of battery sheets in a double-sided battery assembly structure provided by the embodiment of the present application
  • FIG. 3 shows a schematic diagram of the arrangement of battery pieces in another double-sided battery assembly structure provided by the embodiment of the present application.
  • the shingled assembly in the prior art connects the entire battery slices by overlapping, but the slices are connected by overlapping, and all the battery slices are not in the same way. Plane, there is a risk of cracking and fragmentation during lamination, and the overlap area will be blocked and some current will be lost.
  • the inventor of the present application has studied the above-mentioned problems and proposed a double-sided battery assembly structure, as shown in FIG. 1, including at least one battery string 100 formed by connecting a plurality of battery pieces 10, and the double-sided battery assembly structure is also Including grid lines arranged on the surface of each battery cell 10, in the same string of battery strings 100, the surfaces of the adjacent cell strings 10 on which the grid lines are arranged are located on the same plane, and in the extending direction of the battery string 100, the front The grid lines on one cell 10 are connected to the grid lines on the following cell 10.
  • the double-sided battery assembly structure includes a first electrode and a second electrode that are disposed oppositely on both sides of each battery piece 10, and the surface provided with the first electrode is the first working surface 11 of the battery piece 10.
  • the first electrode has a first grid line 20
  • the surface provided with the second electrode is the second working surface 12 of the battery sheet 10
  • the second electrode has a second grid line 30 in the extending direction of the battery string 100
  • the first working surface 11 of each cell 10 and the second working surface 12 of the adjacent cell 10 are located on the same plane, and the first grid line 20 on the previous cell 10 and the first grid line 20 on the next cell 10 are in the same plane.
  • the two grid lines 30 are on the same straight line and connected, as shown in FIG. 1.
  • the grid lines connecting adjacent cells are conveniently located on the same plane, so that components such as solder ribbons do not need to pass through the area between adjacent cells to achieve two
  • the connection between the two can realize the full utilization of the module area; and, because the grid lines connected between adjacent cells are on the same straight line, the above components can not cause light emission when connecting adjacent cells.
  • the occlusion of the area Therefore, adopting the above-mentioned double-sided battery assembly structure of the present invention can realize effective utilization of the area of the assembly while avoiding overlap and blocking.
  • the above-mentioned double-sided battery assembly structure of the present invention includes a plurality of battery slices 10, the first working surface 11 of each battery slice 10 is provided with a first electrode, the first electrode has a first grid line 20, and the second electrode of each battery slice 10
  • the working surface 12 is provided with a second electrode, and the second electrode has a second grid line 30.
  • the first working surface 11 of each cell 10 and the second working surface of the adjacent cell 10 12 is located on the same plane, it can be understood that the adjacent battery slices 10 are arranged alternately in front and back along the arrangement direction.
  • the first working surface 11 can be the front side of the battery slice 10
  • the second working surface 12 is the reverse side of the battery slice 10. As shown in Figure 1.
  • Each of the above-mentioned battery slices 10 may have a conventional structure in the prior art.
  • the battery slices 10 may be independently selected from double-sided PERC batteries, double-sided N-type PERT batteries, double-sided TOPCon batteries, double-sided HIT batteries, and double-sided IBC batteries. Any one of them, but not limited to the above types, can be reasonably selected by those skilled in the art according to the prior art.
  • Each of the above-mentioned battery slices 10 has opposite first and second ends.
  • the first gate line 20 is located at the first end
  • the second gate line 30 is located at the second end
  • the first gate line 20 and the second gate line 30 are disposed away from each other, as shown in FIGS. 2 and 3.
  • the above-mentioned first gate line 20 and the second gate line 30 are both main gate lines. More preferably, the extending direction of the first grid line 20 and the second grid line 30 is the same as the extending direction of the battery string 100.
  • the first electrode and the second electrode may also include a plurality of thin grid lines arranged in parallel, the thin grid lines are perpendicular to the main grid line, and the thin grid lines collect current to the main grid line and then lead it out. Since the shorter the thin grid lines are, the lower the resistance loss is. Therefore, the above-described arrangement of the present invention can locate the main grid lines in the long side direction of the cell, so that the thin grid lines perpendicular to it are located in the short side direction, and the resistance loss is small.
  • the battery slices 10 in order to make the arrangement of the battery slices 10 easier, preferably, the battery slices 10 have the same size.
  • the above-mentioned double-sided battery assembly structure of the present invention may include a plurality of battery strings 100, and the battery slices 10 in each adjacent battery string 100 are arranged correspondingly, as shown in FIGS. 2 and 3.
  • the number of battery slices 10 in each battery string 100 is the same.
  • the first grid line 20 and the second grid line 30 on the same straight line can be connected by a conventional conductive structure in the prior art, for example, a welding tape is used to connect the first grid line 20 and the second grid line 30.
  • a gate line 20 and a second gate line 30 are connected in a straight line.
  • a conductive film is used to connect the first gate line 20 and the second gate line 30 in the same straight line.
  • the conductive film may be a resin layer with a conductive medium.
  • the above-mentioned conductive medium is conductive particles and/or conductive filaments.
  • adjacent cells are alternately placed front and back, and the grid lines connecting adjacent cells are located on the same plane, so that components such as solder ribbons do not need to pass through the area between adjacent cells.
  • the connection between the two can realize the full use of the module area by shortening the distance between the two or directly adjoining the cells;

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

Abstract

Structure d'assemblage de cellules double face. La structure d'assemblage de cellules double face comprend au moins une série de cellules (100) formée en connectant de multiples plaques de cellule (10). La structure d'assemblage de cellules double face comprend également des lignes de grille prévues sur les surfaces des plaques de cellule (10). Dans une même série de séries de batteries (100), les surfaces des plaques de cellules adjacentes (10) sur lesquelles les lignes de grille sont prévues sont situées au niveau d'un même plan ; en outre, dans la direction d'extension de la série de cellules (100), la ligne de grille sur l'une quelconque des plaques de la cellule (10) précédente est reliée à la ligne de grille sur la plaque de la cellule (10) suivante. Les lignes de grille de plaques de cellules (10) adjacentes dans la disposition décrite se trouvent sur un même plan, des parties telles qu'un ruban de soudure n'ont pas besoin de traverser la zone entre des plaques de cellules (10) adjacentes pour mettre en œuvre la liaison des deux, mettant ainsi en œuvre l'utilisation complète de la zone de l'assemblage en réduisant l'intervalle entre deux plaques de cellules (10) adjacentes ou des plaques de cellules adjacentes.
PCT/CN2020/110079 2019-12-17 2020-08-19 Structure d'assemblage de cellules double face WO2021120655A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201911305039.3 2019-12-17
CN201911305039.3A CN111129175A (zh) 2019-12-17 2019-12-17 双面电池组件结构

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WO2021120655A1 true WO2021120655A1 (fr) 2021-06-24

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111129175A (zh) * 2019-12-17 2020-05-08 杭州福斯特应用材料股份有限公司 双面电池组件结构
CN115207138B (zh) * 2021-04-13 2024-04-26 苏州阿特斯阳光电力科技有限公司 光伏组件、电池串及其制作方法

Citations (8)

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US5667596A (en) * 1994-11-04 1997-09-16 Canon Kabushiki Kaisha Photovoltaic device and manufacturing method of the same
CN104465892A (zh) * 2014-12-31 2015-03-25 中国科学院上海微系统与信息技术研究所 太阳电池串中相邻太阳电池的同侧互联的光伏组件制作方法
CN206907783U (zh) * 2017-04-18 2018-01-19 浙江晶科能源有限公司 一种双面光伏组件
CN108878568A (zh) * 2018-06-20 2018-11-23 晶科能源科技（海宁）有限公司 一种双面太阳能电池组件的串焊结构及方法
CN209729929U (zh) * 2016-05-20 2019-12-03 斯戴勒公司 光伏电池阵列
CN110993716A (zh) * 2019-12-27 2020-04-10 晶科能源科技（海宁）有限公司 一种光伏组件内部半导体元器件连接结构
CN111129175A (zh) * 2019-12-17 2020-05-08 杭州福斯特应用材料股份有限公司 双面电池组件结构
CN111200037A (zh) * 2020-01-13 2020-05-26 任建丽 一种晶硅光伏电池组件中光伏电池的连接方式

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CN102522460A (zh) * 2011-12-31 2012-06-27 巨力新能源股份有限公司 硅基太阳能电池片封装光伏组件的方法
CN105789359A (zh) * 2016-03-29 2016-07-20 晶澳（扬州）太阳能科技有限公司 一种双面太阳能电池组件的制作方法

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5667596A (en) * 1994-11-04 1997-09-16 Canon Kabushiki Kaisha Photovoltaic device and manufacturing method of the same
CN104465892A (zh) * 2014-12-31 2015-03-25 中国科学院上海微系统与信息技术研究所 太阳电池串中相邻太阳电池的同侧互联的光伏组件制作方法
CN209729929U (zh) * 2016-05-20 2019-12-03 斯戴勒公司 光伏电池阵列
CN206907783U (zh) * 2017-04-18 2018-01-19 浙江晶科能源有限公司 一种双面光伏组件
CN108878568A (zh) * 2018-06-20 2018-11-23 晶科能源科技（海宁）有限公司 一种双面太阳能电池组件的串焊结构及方法
CN111129175A (zh) * 2019-12-17 2020-05-08 杭州福斯特应用材料股份有限公司 双面电池组件结构
CN110993716A (zh) * 2019-12-27 2020-04-10 晶科能源科技（海宁）有限公司 一种光伏组件内部半导体元器件连接结构
CN111200037A (zh) * 2020-01-13 2020-05-26 任建丽 一种晶硅光伏电池组件中光伏电池的连接方式

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