WO2021072906A1 - 一种光伏组件 - Google Patents

一种光伏组件 Download PDF

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Publication number
WO2021072906A1
WO2021072906A1 PCT/CN2019/119923 CN2019119923W WO2021072906A1 WO 2021072906 A1 WO2021072906 A1 WO 2021072906A1 CN 2019119923 W CN2019119923 W CN 2019119923W WO 2021072906 A1 WO2021072906 A1 WO 2021072906A1
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Prior art keywords
solar cell
photovoltaic module
interconnection
interconnection bar
length
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PCT/CN2019/119923
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English (en)
French (fr)
Inventor
郭志球
陶武松
李婷婷
张延炎
王路闯
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浙江晶科能源有限公司
晶科能源有限公司
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Priority claimed from CN201921738818.8U external-priority patent/CN210246656U/zh
Priority claimed from CN201910983835.6A external-priority patent/CN110677101A/zh
Application filed by 浙江晶科能源有限公司, 晶科能源有限公司 filed Critical 浙江晶科能源有限公司
Publication of WO2021072906A1 publication Critical patent/WO2021072906A1/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
    • H01L31/04—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
    • 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
    • H02S20/00—Supporting structures for PV modules
    • 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 invention relates to the technical field of photovoltaic power generation, in particular to a photovoltaic module.
  • the photovoltaic module is composed of multiple cells, and the cells are connected in series through interconnection bars.
  • the interconnection bars pass over one cell and enter under the next cell, and connect the cells in sequence.
  • the edges of the battery slices are usually arranged overlapping in the prior art, that is, the battery slices are alternately distributed above and below the interconnection bar, and the edges of the battery slices overlap. Because the interconnection bar itself has a certain diameter, the edges of two adjacent battery slices overlap, and the interconnection bar is located between the two, creating a gap between the edges of the two. Gravity, wind pressure, and other external pressures act on the surface of the cell to generate pressure on the surface of the cell, and the pressure at the location of the interconnection bar is concentrated, which may easily cause the cell to crack and reduce the yield of photovoltaic modules.
  • the object of the present invention is to provide a photovoltaic module, the solar cells of which are provided with interconnecting strips located in the relief groove, so that the edges of two adjacent solar cells can be attached to each other without the support of interconnecting strips, thereby avoiding solar energy.
  • the cell is cracked.
  • the present invention provides a photovoltaic module, comprising solar cells and interconnecting bars for connecting two adjacent solar cells. At least one of the two adjacent solar cells is provided with The giving way slot for the interconnection bar to give way.
  • the shape of the relief groove is U-shaped, and extends from the edge of the solar cell sheet to the inner side along the axial direction of the interconnecting bar for a predetermined length.
  • the preset length is 1-20 mm, and the width of the relief groove is 0.1-20 mm.
  • At least 5 of the solar cell sheets are connected in series to form a battery string.
  • the length of the solar cell sheet is not less than 150mm, and the width is not less than 10mm.
  • both ends of the solar cell sheet corresponding to the interconnection bar are provided with the relief grooves.
  • the length of the interconnection bar is greater than the length of the solar cell sheet.
  • a protective cover for protecting the interconnection bar is embedded in the relief groove.
  • the photovoltaic module provided by the present invention includes a solar cell and an interconnection bar for connecting two adjacent solar cells. At least one of the two adjacent solar cells is provided with the interconnection bar. Bit give way slot.
  • the solar cell sheet is provided with a recess for the interconnection bar.
  • the interconnection bar is located in the relief slot, so the edges of the two solar cells can be attached to each other, and the upper solar cell is supported by the lower solar cell.
  • the area of the intermediate support is increased to avoid stress concentration, thereby preventing the solar cell from cracking, and improving the yield of photovoltaic modules.
  • Figure 1 is a schematic diagram of the structure of a photovoltaic module provided by the present invention.
  • FIG. 1 is a schematic diagram of the structure of the photovoltaic module provided by the present invention.
  • the photovoltaic module provided by the present invention includes a solar cell 1 and an interconnection bar 2.
  • the solar cell 1 is provided with a fine grid for collecting charges generated at various parts, and the interconnection bar 2 is vertical fine grid, Used to derive the charge collected by the fine grid.
  • Two adjacent solar cells 1 in the length direction are connected in series by interconnecting bars 2 to form a battery string.
  • the number of solar cells 1 in the battery string is greater than or equal to 5, and the solar cells 1 are alternately distributed above and above the interconnecting bars 2.
  • Below. In order to increase the effective power generation area, the edges of adjacent solar cell sheets 1 will overlap each other, thereby eliminating the gap between the two.
  • the interconnection bar 2 is located between the overlapping parts of the solar cell 1.
  • the interconnection bar 2 occupies a certain height in the vertical direction, so that the edge of the solar cell 1 located above is supported by the interconnection bar 2, which results in the solar cell
  • the edge of the sheet 1 is prone to stress concentration.
  • the solar cell sheet 1 is provided with a relief slot 3 located on the periphery of the intersection of the interconnection bar 2 and the solar cell sheet 1.
  • the length of the relief slot 3 is longer than two solar cells The width of the overlapped portion of the cell 1.
  • the interconnection bar 2 After the solar cell 1 is installed, the interconnection bar 2 enters the relief slot 3 before reaching the overlapped part of the two solar cells 1 to avoid the interconnection bar 2 from adhering to the edges of the upper and lower solar cell 1 to form an obstacle , Improve the contact area between the two and avoid the occurrence of stress concentration.
  • the interconnection bar 2 and the thin grid can also extend in other directions, which is not limited here.
  • the relief groove 3 is located on the side of the solar cell 1 intersecting with the interconnection bar 2, and the solar cell 1 is generally rectangular.
  • a relief groove 3 is provided on one width side of the solar cell sheet 1 and no relief groove 3 is provided on the other side.
  • the width side with the relief groove 3 is connected to the width side without the relief groove 3, and the side without the relief groove 3 is usually overlapped with the relief groove 3 3 above the side.
  • This embodiment can further increase the effective power generation area of the photovoltaic module.
  • the two width sides of the solar cell 1 are provided with relief grooves 3, and there is no need to adjust the direction of the solar cell 1 when installing the photovoltaic module, which improves the installation efficiency of the photovoltaic module. .
  • the shape of the relief groove 3 is U-shaped. As shown in FIG. 1, the relief groove 3 extends from the edge of the solar cell sheet 1 along the axial direction of the interconnection bar 2 to the inner side of the solar cell sheet 1 for a predetermined length. There are fine grids on the outer circumference of the relief groove 3 and between the relief groove 3 to ensure that the charge generated in the area between the relief grooves 3 can be effectively collected, thereby ensuring that the area between the relief grooves 3 is effectively used .
  • the optional range of the preset length of the relief slot 3 is 1-20mm, and the optional range of the width of the relief slot 3 is 0.1-20mm.
  • the user can also set the preset length and the width of the relief slot 3 according to needs, and can also choose other shapes of relief slots 3, such as rectangular, triangular, or trapezoidal.
  • the solar cell 1 is provided with a relief groove 3, and the interconnection bar 2 is located in the relief groove 3 without occupying additional space in the vertical direction, so that the sides of the solar cell 1 can be attached to each other to avoid The occurrence of the stress concentration phenomenon avoids the problem of cracks in the solar cell 1.
  • the length of the solar cell 1 is not less than 150 mm
  • the width is not less than 10 mm
  • the length of the interconnection bar 2 is greater than or equal to the length of the solar cell 1.
  • a wedge-shaped bevel can be provided on one side edge of the relief groove 3, that is, the cross section of the edge of the solar cell 1 is wedge-shaped, so that it is above or above the edge of the solar cell 1
  • An inclined surface is generated below, and the inclined surfaces on opposite sides are respectively located on the upper surface and the lower surface of the solar cell sheet 1.
  • the two wedge-shaped inclined surfaces are attached to each other, which further increases the contact area between the two solar cells 1 and reduces the pressure on the contact surface to prevent the solar cell 1 from cracking.
  • a protective cover is also embedded in the relief groove 3.
  • the protective cover can be made of thermosetting plastic and other materials. The protective cover is set above the interconnection bar 2 to prevent the interconnection bar 2 from growing. Rust causes an increase in electrical resistance.
  • the length of the interconnection bar 2 is greater than or equal to the length of the solar cell 1, which prevents the stress generated by the interconnection bar 2 from being applied to the solar cell 1 after welding.
  • the edge of the solar cell 1 is provided with a wedge-shaped slope. If the interconnection bar 2 produces stress due to thermal expansion and contraction, the solar cell 1 can move along the wedge-shaped slope to avoid direct stress on the solar cell 1. This reduces the risk of the solar cell 1 cracking.

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  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • 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)
  • Photovoltaic Devices (AREA)

Abstract

一种光伏组件，包括太阳能电池片和用以导通相邻两块所述太阳能电池片的互联条，相邻两块太阳能电池片中至少一块设有用以为互联条让位的让位槽。太阳能电池片上设有为互联条让位的让位槽。当两块太阳能电池片相连时，二者边缘重叠，互联条位于让位槽中，因而两块太阳能电池片的边缘能够相互贴合，上方的太阳能电池片通过下方的太阳能电池片支撑，二者间支撑面积增大，避免了应力集中现象，进而避免了太阳能电池片产生隐裂，提高了光伏组件的良率。

Description

一种光伏组件
本申请要求于2019年10月16日提交中国专利局、申请号为201910983835.6、发明名称为“一种光伏组件”以及申请号为201921738818.8、实用新型名称为“一种光伏组件”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
本发明涉及光伏发电技术领域，特别涉及一种光伏组件。
背景技术
随着太阳能光伏电池及组件技术的发展，市场对高效组件的需求愈来愈迫切。在当下光伏大环境下，如何提升单位面积发电量称为光伏企业所关注的焦点。想要提高单位面积发电量，一方面可以提高光伏电池的发电效率，另一方面可以提高有效的发电面积。
光伏组件由多块电池片构成，电池片之间通过互联条串联，互联条由一块电池片上方经过，进入下一块电池片的下方，依次连接电池片。为消除电池片之间的缝隙，现有技术中电池片的边缘通常重叠设置，即电池片交替分布在互联条的上方和下方，电池片的边缘重叠。由于互联条自身具有一定直径，两块相邻的电池片的边缘重叠，互联条位于二者之间，使二者边缘间产生空隙。重力、风压以及其他外界压力作用在电池片表面对电池片表面产生压力，而互联条所在位置压力集中分布，容易造成电池片隐裂，导致光伏组件良率降低。
因此，如何避免电池片发生隐裂是本领预计的技术问题。
发明内容
本发明的目的是提供一种光伏组件，其太阳能电池片设有为互联条位于让位槽中，从而使相邻两块太阳能电池片的边缘可相互贴合，无需互联条支撑，进而避免太阳能电池片发生隐裂。
为实现上述目的，本发明提供一种光伏组件，包括太阳能电池片和用以导通相邻两块所述太阳能电池片的互联条，相邻两块所述太阳能电池片中至少一块设有用以为所述互联条让位的让位槽。
优选地，所述让位槽的形状呈U型，并从所述太阳能电池片的边缘沿所述互联条的轴向向内侧延伸预设长度。
优选地，所述预设长度为1～20mm，所述让位槽的宽度为0.1～20mm。
优选地，至少5片所述太阳能电池片串联形成电池串。
优选地，所述太阳能电池片的长度不小于150mm，宽度不小于10mm。
优选地，所述太阳能电池片对应所述互联条的两端均设有所述让位槽。
优选地，所述互联条的长度大于所述太阳能电池片的长度。
优选地，所述让位槽中还嵌有用以保护所述互联条的防护罩。
本发明所提供的光伏组件，包括太阳能电池片和用以导通相邻两块所述太阳能电池片的互联条，相邻两块所述太阳能电池片中至少一块设有用以为所述互联条让位的让位槽。
太阳能电池片上设有为互联条让位的让位槽。当两块太阳能电池片相连时，二者边缘重叠，互联条位于让位槽中，因而两块太阳能电池片的边缘能够相互贴合，上方的太阳能电池片通过下方的太阳能电池片支撑，二者间支撑面积增大，避免了应力集中现象，进而避免了太阳能电池片产生隐裂，提高了光伏组件的良率。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术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发明的实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据提供的附图获得其他的附图。
图1为本发明所提供的光伏组件的结构示意图；
其中，图1中的附图标记为：
太阳能电池片1、互联条2、让位槽3。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
为了使本技术领域的技术人员更好地理解本发明方案，下面结合附图和具体实施方式对本发明作进一步的详细说明。
请参考图1，图1为本发明所提供的光伏组件的结构示意图。
本发明所提供的光伏组件，如图1所示，包括太阳能电池片1和互联条2，太阳能电池片1上设有用于收集各部位所产生的电荷的细栅，互联条2垂直细栅、用于将细栅所收集的电荷导出。长度方向上相邻的两片太阳能电池片1通过互联条2串联形成电池串，通常电池串中太阳能电池片1的数量大于或等于5片，太阳能电池片1交替分布在互联条2的上方和下方。为提高有效发电面积，相邻的太阳能电池片1的边缘会相互重叠，进而消除二者之间的间隙。互联条2位于太阳能电池片1的重叠部分之间，现有技术中互联条2在竖直方向上占据一定高度，使得位于上方的太阳能电池片1边缘由互联条2支撑，这就导致太阳能电池片1的边缘容易发生应力集中现象。为消除互联条2在竖直方向所占的空间，太阳能电池片1上设有位于互联条2与太阳能电池片1侧边交点外周的让位槽3，让位槽3的长度长于两块太阳能电池片1重叠部分的宽度。太阳能电池片1安装完成后，互联条2在到达两块太阳能电池片1重叠部分之前先进入让位槽3中，避免了互联条2对上下两块太阳能电池片1的边缘相互贴合形成阻碍，提高了二者之间的接触面积，避免了应力集中现象的发生。当然，互联条2和细栅也可沿其他方向延伸，在此不做限定。
可选的，让位槽3位于与互联条2相交的太阳能电池片1的侧边，太阳能电池片1通常呈矩形。本申请的一种具体实施方式中，太阳能电池片1的一条宽度侧边上设置让位槽3，另一侧不设置让位槽3。两块太阳能电池片1相连时，设有让位槽3的宽度侧边与未设让位槽3的宽度侧边相连， 未设置让位槽3的侧边通常搭接在设有让位槽3的侧边上方。本具体实施方式可进一步增加光伏组件的有效发电面积。
本申请的另外一种具体实施方式中，太阳能电池片1的两条宽度侧边均设有让位槽3，在安装光伏组件时无需调整太阳能电池片1的方向，提高了光伏组件的安装效率。
可选的，让位槽3的形状呈U型，如图1所示，让位槽3从太阳能电池片1的边缘沿互联条2的轴向向太阳能电池片1的内侧延伸预设长度，让位槽3的外周和让位槽3之间均设有细栅，保证让位槽3之间的区域所产生的电荷能够被有效收集，进而保证让位槽3之间的区域得到有效利用。让位槽3的预设长度可选的范围为1～20mm，让位槽3宽度的可选范围为0.1～20mm。当然，用户也可根据需要设置预设长度和让位槽3的宽度，也可选用其他形状的让位槽3，如矩形、三角形或梯形等。
本实施例中，太阳能电池片1上设置了让位槽3，互联条2位于让位槽3中无需额外占用竖直方向上的空间，使太阳能电池片1的侧边能够相互贴合，避免应力集中现象的发生，避免了太阳能电池片1发生隐裂的问题。
可选的，太阳能电池片1的长度不小于150mm，宽度不小于10mm，互联条2的长度大于或等于太阳能电池片1的长度。互联条2相连时，其长度方向不会产生拉应力，因而不会增加两块太阳能电池片1的重叠部位上的压力，降低了太阳能电池片1发生隐裂的风险。
另外，为进一步提高太阳能电池片1承受应力的能力，让位槽3所在的一侧边缘可设置楔形斜面，即太阳能电池片1边缘的横截面呈楔形，从而在太阳能电池片1边缘的上方或下方产生斜面，相对两侧边的斜面分别位于太阳能电池片1的上表面和下表面。两块太阳能电池片1相连时两楔形斜面相贴合，进一步增加了两块太阳能电池片1间的接触面积，降低接触面上的压强，避免太阳能电池片1发生隐裂。此外，为避免互联条2被雨水等腐蚀，让位槽3中还嵌有防护罩，防护罩可具体为热固性塑料等材质制成，防护罩罩设在互联条2上方，避免互联条2生锈导致电阻增加。
本实施例中，互联条2长度大于或等于太阳能电池片1的长度，避免 了互联条2焊接后产生的应力作用在太阳能电池片1上。同时太阳能电池片1的边缘设置了楔形斜面，如果互联条2因热胀冷缩等原因产生应力作用时，太阳能电池片1能够沿楔形斜面移动，避免应力直接作用在太阳能电池片1上，避免了太阳能电池片1发生隐裂的风险。
需要说明的是，在本说明书中，诸如第一和第二之类的关系术语仅仅用来将一个实体与另外几个实体区分开来，而不一定要求或者暗示这些实体之间存在任何这种实际的关系或者顺序。
以上对本发明所提供的光伏组件进行了详细介绍。本文中应用了具体个例对本发明的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本发明的方法及其核心思想。应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以对本发明进行若干改进和修饰，这些改进和修饰也落入本发明权利要求的保护范围内。

Claims (8)

  1. 一种光伏组件，其特征在于，包括太阳能电池片(1)和用以导通相邻两块所述太阳能电池片(1)的互联条(2)，相邻两块所述太阳能电池片(1)中至少一块设有用以为所述互联条(2)让位的让位槽(3)。
  2. 根据权利要求1所述的光伏组件，其特征在于，所述让位槽(3)的形状呈U型，并从所述太阳能电池片(1)的边缘沿所述互联条(2)的轴向向内侧延伸预设长度。
  3. 根据权利要求2所述的光伏组件，其特征在于，所述预设长度为1～20mm，所述让位槽(3)的宽度为0.1～20mm。
  4. 根据权利要求1所述的光伏组件，其特征在于，至少5片所述太阳能电池片(1)串联形成电池串。
  5. 根据权利要求4所述的光伏组件，其特征在于，所述太阳能电池片(1)的长度不小于150mm，宽度不小于10mm。
  6. 根据权利要求1至5任意一项所述的光伏组件，其特征在于，所述太阳能电池片(1)对应所述互联条(2)的两端均设有所述让位槽(3)。
  7. 根据权利要求1至5任意一项所述的光伏组件，其特征在于，所述互联条(2)的长度大于所述太阳能电池片(1)的长度。
  8. 根据权利要求1至5任意一项所述的光伏组件，其特征在于，所述让位槽(3)中还嵌有用以保护所述互联条(2)的防护罩。
PCT/CN2019/119923 2019-10-16 2019-11-21 一种光伏组件 WO2021072906A1 (zh)

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CN105932084A (zh) * 2016-05-06 2016-09-07 协鑫集成科技股份有限公司 太阳能电池组件及其制备方法
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CN208848913U (zh) * 2018-06-08 2019-05-10 苏州阿特斯阳光电力科技有限公司 太阳能电池片及光伏组件
CN110112244A (zh) * 2019-04-19 2019-08-09 泰州隆基乐叶光伏科技有限公司 太阳电池片、太阳电池串及太阳电池组件
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