WO2021051929A1 - 切片光伏组件 - Google Patents

切片光伏组件 Download PDF

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Publication number
WO2021051929A1
WO2021051929A1 PCT/CN2020/098780 CN2020098780W WO2021051929A1 WO 2021051929 A1 WO2021051929 A1 WO 2021051929A1 CN 2020098780 W CN2020098780 W CN 2020098780W WO 2021051929 A1 WO2021051929 A1 WO 2021051929A1
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Prior art keywords
battery
battery string
string
series
jumper
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PCT/CN2020/098780
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English (en)
French (fr)
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郭俊盼
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天合光能股份有限公司
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Publication of WO2021051929A1 publication Critical patent/WO2021051929A1/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
    • H01L31/044—PV modules or arrays of single PV cells including bypass diodes
    • 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 invention belongs to the technical field of solar energy, and specifically relates to a novel sliced photovoltaic module.
  • the present invention provides a new type of sliced photovoltaic module.
  • sliced cells and circuit design it can increase the number of cells and increase the power while avoiding the substantial increase in the Voc of the module due to the increase in the number of cells, and at the same time reduce the number of solar cells.
  • the power loss of the module can improve the power loss of the hot spot of the solar cell module.
  • a new type of sliced photovoltaic module includes one or more battery cells (4) connected in series.
  • the battery cell (4) includes one or more battery string series (3) connected in series or parallel. (3) It includes one or more battery strings (2) connected in parallel through a bus bar, and the battery string includes a plurality of slice batteries (1) connected in series through an interconnection bar (10); wherein:
  • the slicing cell (1) is a conventional solar cell sheet which is laser-cut into 2-4 independent small sheet cells of the same specification.
  • Each battery chip has a positive electrode and a back electrode, and each of the positive electrode and the back electrode has a positive electrode and a back electrode. The positions coincide with each other; the sliced batteries are connected in series via the interconnection bar (10) to form a battery string (2).
  • the battery unit (4) includes one or more battery string series (3) connected in series, and the battery string series (3) is a continuous same string.
  • the battery string of the string forms two symmetrical upper and lower parts, which are the upper battery string (5) and the lower battery string (6).
  • the battery strings of the upper battery string (5) are connected in parallel with each other, and the battery strings of the lower battery string (6) are connected in parallel with each other.
  • the upper battery string (5) and the lower battery string (6) pass through the middle bus bar ( 11) Connect in parallel, and the battery slices at the connection have the same polarity; the upper battery string (5) in one battery cell is connected in series with the same upper battery string (5) in the adjacent battery cell, and one battery cell The lower part of the battery string (6) in the battery cell is connected in series with the same lower part of the battery string (6) in the adjacent battery cells; each battery cell is connected in parallel with a bypass diode (7), the bypass diode (7) A jumper wire is drawn from the bus bar connected in series between the battery unit and the battery unit to intersect with the middle bus bar.
  • the bypass diode (7) is at the middle position of the component in the longitudinal direction
  • the jumper wire (8) has two jumpers, namely the first jumper wire (8A) and the second jumper wire (8B).
  • the first jumper (8A) can be arranged between the battery string and the battery string, or the back of the battery string;
  • the second jumper (8B) can be arranged between the battery string and the edge of the glass, between the battery string and the Between the battery strings, or the back of the battery string; when placed between the battery string and the edge of the glass, the battery string of the battery cell connected to the second jumper (8B) and the poles of the battery string of the adjacent battery cell
  • the battery string of the battery unit connected to the second jumper (8B) and the battery string of the adjacent battery unit have the same polarity;
  • the first jumper (8A) When the component is in normal working state, it does not transmit current, and only used to bypass the transmission current when the component has hot spots and the bypass diode is working; the
  • bypass diode two bypass diodes adjacent to each other can be integrated into one line box or each integrated into two line boxes, and the other diode is integrated into the line box separately.
  • the battery unit (4) includes two or more battery strings (2) connected in parallel, and the battery strings (2) in the same battery unit are parallel to each other and have the same polarity.
  • the battery cells (4) are connected in series by a bus bar, and each battery cell (4) is connected in parallel with a bypass diode (7), and the battery cells (4) work independently of each other, the bypass diode (7) It is connected to a series bus bar between adjacent battery cells through a jumper (8), one end of the bypass diode is connected to the positive or negative electrode of the battery cell, and the other end is connected to the connected jumper.
  • the jumper wire (8) is arranged at a position between two adjacent battery cells; or, the back of the battery string is isolated by insulating material.
  • the jumper (8) does not transmit current when the component is in a normal state.
  • bypass diodes are respectively arranged on the two long side edges of the component, where two bypass diodes are adjacent to each other and can be integrated in one line box or each integrated in two line boxes, and the other one is next to each other.
  • the road diode is separately integrated in the wire box.
  • the present invention has the following beneficial effects:
  • the existing solar cells of conventional size (156 ⁇ 300mm) are laser cut into 2-4 independent small cells of the same specification, and then through circuit design, the above-mentioned several small cells are connected in series and parallel to form in sequence Battery strings, battery string series, and battery cells are formed on this basis to form battery components.
  • the circuit design By optimizing the circuit design, the power of the components can be increased, and the Voc of the components can be reduced without greatly increasing the Isc of the component.
  • a single branch of the system can be connected in series. More components, reducing system-side BOS costs.
  • a jumper wire is used to connect the parallel bypass diode, which is convenient for operation.
  • the bypass function can be realized when the shadow is blocked, so as to avoid overheating and damaging the components.
  • Fig. 1 is a circuit diagram in embodiment 1 of the present invention
  • Figure 2 is a connection mode of the battery string series in embodiment 1 of the present invention.
  • 3A and 3B are another connection mode of the battery string series in Embodiment 1 of the present invention.
  • Figure 4 is another circuit diagram in Embodiment 1 of the present invention.
  • FIG. 5 is a circuit diagram of Embodiment 2 of the present invention.
  • Fig. 6 is a connection mode of the battery string in embodiment 2 of the present invention.
  • 1 is a small piece of battery
  • 2 is a battery string
  • 3 is a battery string series
  • 4 is a battery unit
  • 5 is the upper part of the battery string
  • 6 is the lower part of the battery string
  • 7 is a bypass diode
  • 8 is a jumper
  • 8A is The first jumper
  • 8B is the second jumper
  • 9 is the bus bar
  • 10 is the interconnection bar
  • 11 is the middle bus bar.
  • the existing solar cells of conventional size are laser-cut into four independent small cells 1 of the same specification, and each small cell has a positive Electrodes and back electrodes, and the positions of each positive electrode and back electrode coincide with each other.
  • the cut small pieces of batteries 1 are connected in series through interconnecting strips 10 to form a battery string 2.
  • the two battery strings 2 are connected in parallel through the interconnection bar, and the battery string in which the two battery strings 2 are connected in parallel is a battery string series 3.
  • Two battery string series 3 are connected by a bus bar to form a battery unit 4.
  • Three battery cells 4 are connected in series to form the sliced photovoltaic module of this embodiment, as shown in FIG. 1.
  • the battery string series 3 can be a continuous same string, instead of being spliced by two battery strings; as shown in Figure 2, it can be changed by changing the direction of the interconnection bar 10 at the middle position of the battery string series. Way, that is: the interconnection direction of a certain cell and the interconnection bar changes during the interconnection, and there will be a larger gap between the two cells where the interconnection direction changes. The larger gap is relative to other small cells. In terms of spacing.
  • the polarity of the small piece of battery 1 in the battery string series from top to bottom is negative, positive, negative, positive...positive, negative, positive, negative or positive, negative, positive, negative...negative, positive, negative, Positive, the interconnection direction of one of the cells changes and the distance between the two cells is larger than that of the other cells.
  • Fig. 3A shows two battery strings
  • Fig. 3B shows the rotation of the battery strings to keep the two battery strings in opposite interconnection directions
  • Splicing is performed on the bus bar 9 to form a battery string series.
  • the large distance is relative to the distance of other small cells, for example, it can be 10-30 mm.
  • the polarity of the battery string, from top to bottom is: negative, positive, negative...positive, negative, positive or positive, negative, positive...negative, positive, negative.
  • the polarity of the spliced battery string series from top to bottom is: negative, positive, negative, positive...positive, negative, positive, negative or positive, negative, positive, negative...negative, positive, negative, positive.
  • the battery string series 3 forms two symmetrical upper and lower parts, which are named the upper battery string 5 and the lower battery string 6 respectively.
  • the two upper battery strings 5 are connected in parallel with each other, the two lower battery strings 6 are connected in parallel with each other, and the upper battery string 5 and the lower battery string 6 are connected in parallel.
  • Parallel connection is made through the middle bus bar 11, and the battery slices at the connection have the same polarity; the upper part of the battery string 5 in one battery cell is the same as the adjacent battery cell.
  • the upper part of the battery string 5 is connected in series through the bus bar 9
  • the lower part of the battery string 6 in one battery cell is connected in series with the same lower part of the battery string 6 in the adjacent battery cell through the bus bar 9.
  • each battery cell 4 is connected in parallel with a bypass diode 7, and each battery cell works independently of each other.
  • the bypass diode 7 intersects with the middle bus bar 11 by leading a jumper 8 from the bus bar 9 connected in series between the battery cell and the battery cell.
  • two jumpers are provided, which are respectively named as the first jumper 8A and the second jumper 8B.
  • the bypass diode 7 is in the middle position of the component in the longitudinal direction, and the first jumper 8A can be installed between the battery string and the battery string, or on the back of the battery string.
  • the second jumper 8B can be arranged between the battery string and the edge of the glass Between the battery string and the battery string, or the back of the battery string.
  • the battery string of the battery cell connected to the second jumper 8B and the battery string of the adjacent battery cell have opposite polarities, as shown in Figure 1; when set in the battery string When it is between, the battery string of the battery unit connected to the second jumper 8B and the battery string of the adjacent battery unit have the same polarity, as shown in Figure 4; when it is installed on the back of the battery string, an insulating material is required Isolate the jumper.
  • the first jumper 8A does not transmit current when the component is in normal working condition, and is only used to bypass the transmission current when the component has hot spots and the bypass diode is working.
  • the second jumper 8B is used to transmit current when the component is in normal working condition.
  • bypass diodes 7 when two bypass diodes 7 are adjacent to each other, they can be integrated in one line box or each in two line boxes, and the other diode is integrated in the line box separately.
  • the battery unit 4 includes an upper battery string 5 connected in parallel and a lower battery string 6 connected in parallel, and the upper battery string 5 and the lower battery string 6 are also connected in parallel with each other.
  • the battery string is increased.
  • the number of parallel connections is based on the same principle of parallel Voc. While increasing the number of batteries and increasing power, it can avoid the substantial increase in component Voc due to the increase in the number of batteries.
  • the number of circuits in parallel increases, and the overall series resistance of the components is also reduced to a certain extent, thereby reducing Power loss.
  • each battery unit is connected to a bypass diode, which enables the battery string to achieve a bypass function when it is shaded by shadows, avoiding overheating and damaging components.
  • this embodiment is the horizontal arrangement of the battery strings.
  • the existing conventional size (156-300mm) solar cell is laser-cut into two or four independent small cells 1 of the same specification, each small cell There are positive electrodes and back electrodes on them, and the positions of each positive electrode and back electrode coincide with each other.
  • the cut small pieces of batteries 1 are connected in series through interconnecting strips 10 to form a battery string 2.
  • Battery strings 2 are connected in parallel to form a battery unit 4.
  • Three battery cells 3 are connected in series to form the sliced photovoltaic module of this embodiment.
  • each battery string is connected in parallel via a bus bar, two or more battery strings 2 connected in parallel can also be regarded as one battery string series 3.
  • the battery strings 2 are parallel to each other and have the same polarity.
  • the battery cells 4 and the battery cells 4 are connected in series by a bus bar 9, and each battery cell 4 is connected in parallel with a bypass diode 7, and each battery cell 4 works independently of each other.
  • the bypass diode 7 is connected to a series bus bar 9 between adjacent battery cells through a jumper 8.
  • One end of the bypass diode 7 is connected to the positive or negative electrode of the battery cell, and the other end is connected to the jumper 8.
  • the jumper 8 is arranged at the position between the battery unit 4 and the battery unit 4 or on the back of the battery string. When placed on the back, the jumper 8 needs to be isolated by insulating material.
  • the jumper 8 does not transmit current when the component is in normal working condition, and is only used to bypass the transmission current when the component has hot spots and the bypass diode is working.
  • bypass diodes 7 are arranged on the two long side edges of the assembly. Two bypass diodes are adjacent to each other and can be integrated in one junction box or each in two junction boxes, and the other bypass diode is integrated online separately. In the box.
  • the four battery strings 2 in the battery unit 4 are connected in parallel to each other, which increases the number of battery strings and parallel connections.
  • parallel Voc while increasing the number of batteries and increasing the power, it can avoid the component Voc caused by the increase in the number of batteries.
  • the introduction of parallel circuits also increases the number of battery series and parallel connections, and the overall series resistance of the components is also reduced to a certain extent, thereby reducing power loss.
  • Each battery cell 4 is connected with a bypass diode, which enables the battery string to achieve a bypass function when it is shaded by shadows, and avoids overheating and damaging the components.
  • bus bar 9 and the middle bus bar 11 may be the same substance, and the two are distinguished only for the convenience of description, and there is no difference in essence.

Abstract

一种切片光伏组件，包括一个或多个串联连接的电池单元（4），电池单元（4）包括一个或多个串联或并联连接的电池串系列（3），电池串系列（3）包括一个或多个通过汇流条（9）并联连接的电池串（2），电池串（2）包括多个通过互联条（10）串联连接的切片电池；其中：切片电池为常规太阳能电池片经激光切割成2-4个独立的相同规格的小片电池（1），每块电池小片（1）上均有正电极和背电极，且每个正电极和背电极的位置相互重合；切片电池经互联条（10）串联形成一个电池串（2）。可解决因电池数量增加而带来组件Voc的大幅增加，同时有效地降低太阳能电池组件的功率损耗，改善太阳能电池组件热斑功率损失。

Description

[根据细则37.2由ISA制定的发明名称]　切片光伏组件 技术领域
本发明属于太阳能技术领域，具体涉及一种新型切片光伏组件。
背景技术
随着硅片尺寸逐渐变大，使用现在电路设计组件内放置电池片数量越来越受限制。同时，随着市场对高功率组件需求持续提升，在现有电池技术提效受限的情况下，提升组件功率最快捷的方法主要是通过增加电池片数量。但是，电池片数量的大幅增加会带来了组件Voc(开路电压)的提升，同时组件Voc的提升造成系统端每个支路串联组件数量减少，相应增加了线缆、支架、汇流箱等，导致系统BOS成本提高，进而影响LCOE。因此，需要设计一种光伏组件，在增加电池数量提升功率的同时，解决因电池数量增加而带来组件Voc的大幅提升，同时通过切片数量与电路设计匹配,降低太阳能电池组件的功率损耗，改善太阳能电池组件热斑功率损失。
发明内容
为了解决上述问题，本发明提供了一种新型切片光伏组件，通过采用切片电池以及电路设计，在增加电池数量提升功率的同时避免因电池数量增加而带来组件Voc的大幅提升，同时降低太阳能电池组件的功率损耗，改善太阳能电池组件热斑功率损失。
为此，本发明采用如下技术方案：
一种新型切片光伏组件，包括一个或多个串联连接的电池单元(4)，所述电池单元(4)包括一个或多个串联或并联连接的电池串系列(3)，所述电池串系列(3)包括一个或多个通过汇流条并联连接的电池串(2)，所述电池串包括多个通过互联条(10)串联连接的切片电池(1)；其中：
所述切片电池(1)为常规太阳能电池片经激光切割成2-4个独立的相同规格的小片电池，每块电池小片上均有正电极和背电极，且每个正电极和背电极的位置相互重合；切片电池经互联条(10)串联形成一个电池串(2)。
作为一种具体的实施方式，所述电池单元(4)包括一个或多个串联连接的电池串系列(3)，所述电池串系列(3)为连续的同一串，在该串电池串的中部位置，通过互联条(10)方向改变或旋转电池串的方式使该串电池串形成上、下对称的两部分，分别为上部分电池串(5)，和下部分电池串(6)，上部分电池串(5)的电池串之间彼此并联，下部分电池串(6)的电池串之间彼此并联，上部分电池串(5)和下部分电池串(6)通过中间汇流条(11)进行并联连接，且该连接处的电池片极性相同；一个电池单元中的上部分电池串(5)与相邻电池单元中的同为上部分电池串(5)串联，一个电池单元中的下部分电池串(6)与相邻电池单元中的同为下部分电池串(6)串联；每个电池单元均并联有一个旁路二极管(7)，所述旁路二极管(7)通过从电池单元和电池单元之间串联的汇流条引出跳线与中间汇流条相交接入。
作为一种具体的实施方式，所述旁路二极管(7)处于组件纵向中间位置，所述跳线(8)具有两根，分别为第一跳线(8A)和第二跳线(8B)，所述第一跳线(8A)可设置于电池串与电池串之间，或者电池串的背面；所述第二跳线(8B)可设置于电池串与玻璃边缘之间、电池串与电池串之间，或者，电池串的背面；当设置于电池串与玻璃边缘之间时，与第二跳线(8B)连接的电池单元的电池串和与其相邻电池单元的电池串的极性相反；当设置于电池串之间时，与第二跳线(8B)连接的电池单元的电池串和与其相邻的电池单元的电池串的极性相同；所述第一跳线(8A)在组件正常工作状态时不传输电流，仅在组件出现热斑、旁路二极管工作时才用于旁路传输电流；所述第二跳线(8B)在组件正常工作状态时用于传输电流。
进一步地，所述旁路二极管中，两个旁路二极管彼此相邻的可集成在一个线盒或者各自集成在两个线盒中，另外一个二极管单独集成在线盒。
作为另一种具体的实施方式，所述电池单元(4)包括并联的两个或两个以上的电池串(2)，在同一电池单元内的电池串(2)彼此平行，且极性相同，电池单元(4)之间通过汇流条串联连接，且每个电池单元(4)均并联有旁路二极管(7)，电池单元(4)之间彼此之间独立工作，所述旁路二极管(7)通过跳线(8)与相邻电池单元之间的串联的汇流条连接，旁路二极管一端与 电池单元正极或者负极相连，另一端与连接的跳线连接。
进一步地，所述跳线(8)设置于相邻两电池单元之间的位置；或者，电池串的背面，并采用绝缘材料进行隔离。
进一步地，所述跳线(8)在组件正常状态下不传输电流。
进一步地，所述旁路二极管分别被布置在于组件的两个长边边缘，其中有两个旁路二极管彼此相邻的可集成在一个线盒或者各自集成在两个线盒中，另外一个旁路二极管单独集成在线盒中。
与现有技术相比，本发明具有如下有益效果：
本发明中将现有常规尺寸(156～300mm)的太阳能电池片经过激光切割成2-4个独立的相同规格的小片电池，然后通过电路设计，将上述若干电池小片进行串联、并联，依次形成电池串、电池串系列以及电池单元，在此基础上再形成电池组件，通过优化电路设计，从而在不大幅增加组件Isc的前提下，提升组件功率，降低组件Voc，系统端单个支路可串联更多组件，降低系统端BOS成本。
经过激光切割后的小片电池，Isc变成切片数分之一；经过优化电路设计实现多个并联电路，组件电阻进一步降低，根据P＝I 2*R，可大幅降低组件功率损耗。
通过电路设计，采用跳线接入并联旁路二极管，方便操作，同时在出现阴影遮挡时可实现旁路功能，避免产生过热损坏组件。
附图概述
图1为本发明实施例1中的一种电路图；
图2为本发明实施例1中电池串系列的一种连接方式；
图3A和图3B为本发明实施例1中电池串系列的另一种连接方式；
图4为本发明实施例1中的另一种电路图；
图5为本发明实施例2的电路图；
图6为本发明实施例2中电池串的连接方式；
其中：1为小片电池，2为电池串，3为电池串系列，4为电池单元，5为 上部分电池串，6为下部分电池串，7为旁路二极管，8为跳线，8A为第一跳线，8B为第二跳线，9为汇流条，10为互联条，11为中间汇流条。
本发明的较佳实施方式
实施例1
如图1-4所示，本实施例中，将现有常规尺寸(156～300mm)的太阳能电池片经过激光切割成四个独立的相同规格的小片电池1，每个小片电池上都有正电极和背电极，且每个正电极和背电极位置相互重合。将切割好的小片电池1经过互联条10串联形成电池串2。通过互联条将两个电池串2并联起来，该串由两个电池串2并联的电池串即为一个电池串系列3。两个电池串系列3通过汇流条连接形成一个电池单元4。三个电池单元4串联形成本实施例的切片光伏组件，如图1所示。
本实施例中，电池串系列3可以为连续的同一串，而不是由两串电池串拼接；如图2所示，可以通过在该串电池串系列的中部位置，通过互联条10方向改变的方式，即：分别在互联中某片电池片与互联条互联方向发生改变,同时互联方向发生改变的这两片之间会有较大的间距，该较大的间距为相对于其他小片电池的间距而言。该电池串系列中的小片电池1的极性从上至下依次是负、正、负、正……正、负、正、负或者正、负、正、负……负、正、负、正，在其中某一片电池互联方向发生改变且这两片之间间距较其它片间距偏大。
或者，通过旋转电池串2的方式，如图3A和图3B所示，其中，图3A示出了两个电池串；图3B示出了通过旋转电池串使两串电池串保持相反的互联方向并在汇流条9上进行拼接，组成一个电池串系列，同时拼接时两串之间会有大间距，该大间距为相对于其他小片电池的间距而言,如可以为10-30mm。此时，电池串的极性，由上至下依次为：负、正、负……正、负、正或者正、负、正……负、正、负。拼接后的电池串系列，极性由上至依次为：负、正、负、正……正、负、正、负或者正、负、正、负……负、正、负、正。
电池串系列3经过上述操作后，形成上、下对称的两部分，分别命名为上部分电池串5，和下部分电池串6。如图1所示，在同一个电池单元内，两个 上部分电池串5之间彼此并联，两个下部分电池串6之间彼此并联，上部分电池串5和下部分电池串6之间通过中间汇流条11进行并联连接，且该连接处的电池片极性相同；一个电池单元中的上部分电池串5与相邻电池单元总的同为上部分电池串5通过汇流条9进行串联，同样地，一个电池单元中的下部分电池串6与相邻电池单元中的同为下部分电池串6通过汇流条9进行串联。
如图1所示，每个电池单元4均并联有旁路二极管7，每个电池单元彼此独立地工作。所述旁路二极管7通过从电池单元与电池单元之间串联的汇流条9引出跳线8与中间汇流条11相交接入。在本实施例中，设置了两根跳线，在此分别命名为第一跳线8A，和第二跳线8B，具体地，所述旁路二极管7处于组件纵向中间位置，第一跳线8A可设置于电池串与电池串之间，或者电池串的背面，当设置于电池串背面时，需要采用绝缘材料对跳线进行隔离；第二跳线8B可设置于电池串与玻璃边缘之间、电池串与电池串之间，或者，电池串的背面。当设置于电池串与玻璃边缘之间时，与第二跳线8B连接的电池单元的电池串和与其相邻电池单元的电池串的极性相反，如图1所示；当设置于电池串之间时，与第二跳线8B连接的电池单元的电池串和与其相邻的电池单元的电池串的极性相同，如图4所示；当设置于电池串背面时，需要采用绝缘材料对跳线进行隔离。第一跳线8A在组件正常工作状态时不传输电流，仅在组件出现热斑、旁路二极管工作时才用于旁路传输电流。第二跳线8B在组件正常工作状态时用于传输电流。
如图1，图4所示，当两个旁路二极管7彼此相邻时，可集成在一个线盒或者各自集成在两个线盒中，另外一个二极管单独集成在线盒。
本发明中，电池单元4包括并联的上部分电池串5，和并联的下部分电池串6，且上部分电池串5和下部分电池串6也彼此并联，通过引入并联电路，增加了电池串并联的数量，根据并联Voc相同原理，在增加电池数量提升功率的同时，可避免因电池数量增加而带来组件Voc的大幅提升，同时电路并联数量增加，组件整体串阻也有一定降低，进而降低功率损耗。同时，每个电池单元均接入旁路二极管，可使电池串在受到阴影遮挡时实现旁路功能，避免产生过热损坏组件。
实施例2
区别于实施例1中电池串的竖向排列的方式，本实施例为电池串横向排列的方式。
如图5，图6所示，本实施例中，将现有常规尺寸(156～300mm)的太阳能电池片经过激光切割成两个或四个独立的相同规格的小片电池1，每个小片电池上都有正电极和背电极，且每个正电极和背电极位置相互重合。将切割好的小片电池1经过互联条10串联形成电池串2。四串电池串2并联形成一个电池单元4。三个电池单元3串联形成本实施例的切片光伏组件。本实施例中，由于各电池串均通过汇流条并联，也可以将两个或两个以上的上述并联的电池串2视为一个电池串系列3。
如图5所示，在同一电池单元4内，电池串2之间彼此平行且极性相同。电池单元4与电池单元4之间通过汇流条9串联连接，且每个电池单元4均并联有一个旁路二极管7，每个电池单元4彼此之间独立工作。旁路二极管7通过跳线8与相邻电池单元之间的串联的汇流条9连接，旁路二极管7的一端与电池单元正极或者负极相连，另一端与跳线8连接。跳线8被布置在电池单元4与电池单元4之间的位置或者电池串背面，当置于背面时需要用绝缘材料将跳线进行隔离。跳线8在组件正常工作状态时不传输电流，仅在组件出现热斑、旁路二极管工作时才用于旁路传输电流。
旁路二极管7被布置在于组件的两个长边边缘，其中有两个旁路二极管彼此相邻的可集成在一个线盒或者各自集成在两个线盒中，另外一个旁路二极管单独集成在线盒中。
本实施例中，电池单元4中4个电池串2彼此并联，增加了电池串并联数量，根据并联Voc相同原理，在增加电池数量提升功率的同时，可避免因电池数量增加而带来组件Voc的大幅提升，引入并联电路同时增加了电池串并联数量，组件整体串阻也有一定降低，进而降低功率损耗。每个电池单元4接入旁路二极管，可使电池串在受到阴影遮挡时实现旁路功能，避免产生过热损坏组件。
本发明中，汇流条9，和中间汇流条11，可以为同一种物质，仅仅为描述 的方便而对两者进行了区分，本质上并无区别。
应当指出，本文中所描述的具体实施例仅仅是对本发明精神作举例说明。本发明所属技术领域的技术人员可以对所描述的具体实施例做各种各样的修改或补充或采用类似的方式替代，但并不会偏离本发明的精神或者超越所附权利要求书所定义的范围。根据本发明提供的小片电池以及并联电池串的设计方案，可根据需要，设置电池片的片数，达到最佳的技术效果。

Claims (8)

  1. 一种新型切片光伏组件，其特征在于：包括一个或多个串联连接的电池单元(4)，所述电池单元(4)包括一个或多个串联或并联连接的电池串系列(3)，所述电池串系列(3)包括一个或多个通过汇流条并联连接的电池串(2)，所述电池串包括多个通过互联条(10)串联连接的切片电池(1)；其中：所述切片电池(1)为常规太阳能电池片经激光切割成2-4个独立的相同规格的小片电池，每块电池小片上均有正电极和背电极，且每个正电极和背电极的位置相互重合；切片电池经互联条(10)串联形成一个电池串(2)。
  2. 根据权利要求1所述的新型切片光伏组件，其特征在于：所述电池单元(4)包括一个或多个串联连接的电池串系列(3)，所述电池串系列(3)为连续的同一串，在该串电池串的中部位置，通过互联条(10)方向改变或旋转电池串的方式使该串电池串形成上、下对称的两部分，分别为上部分电池串(5)，和下部分电池串(6)，上部分电池串(5)的电池串之间彼此并联，下部分电池串(6)的电池串之间彼此并联，上部分电池串(5)和下部分电池串(6)通过中间汇流条(11)进行并联连接，且该连接处的电池片极性相同；一个电池单元中的上部分电池串(5)与相邻电池单元中的同为上部分电池串(5)串联，一个电池单元中的下部分电池串(6)与相邻电池单元中的同为下部分电池串(6)串联；每个电池单元均并联有一个旁路二极管(7)，所述旁路二极管(7)通过从电池单元和电池单元之间串联的汇流条引出跳线与中间汇流条相交接入。
  3. 根据权利要求2所述的新型切片光伏组件，其特征在于：所述旁路二极管(7)处于组件纵向中间位置，所述跳线(8)具有两根，分别为第一跳线(8A)和第二跳线(8B)，所述第一跳线(8A)可设置于电池串与电池串之间，或者电池串的背面；所述第二跳线(8B)可设置于电池串与玻璃边缘之间、电池串与电池串之间，或者，电池串的背面；当设置于电池串与玻璃边缘之间时，与第二跳线(8B)连接的电池单元的电池串和与其相邻电池单元的电池串的极性相反；当设置于电池串之间时，与第二跳线(8B)连接的电池单元的电 池串和与其相邻的电池单元的电池串的极性相同；所述第一跳线(8A)在组件正常工作状态时不传输电流，仅在组件出现热斑、旁路二极管工作时才用于旁路传输电流；所述第二跳线(8B)在组件正常工作状态时用于传输电流。
  4. 根据权利要求2所述的新型切片光伏组件，其特征在于：所述旁路二极管中，两个旁路二极管彼此相邻的可集成在一个线盒或者各自集成在两个线盒中，另外一个二极管单独集成在线盒。
  5. 根据权利要求1所述的新型切片光伏组件，其特征在于：所述电池单元(4)包括并联的两个或两个以上的电池串(2)，在同一电池单元内的电池串(2)彼此平行，且极性相同，电池单元(4)之间通过汇流条串联连接，且每个电池单元(4)均并联有旁路二极管(7)，电池单元(4)之间彼此之间独立工作，所述旁路二极管(7)通过跳线(8)与相邻电池单元之间的串联的汇流条连接，旁路二极管一端与电池单元正极或者负极相连，另一端与连接的跳线连接。
  6. 根据权利要求5所述的新型切片光伏组件，其特征在于：所述跳线(8)设置于相邻两电池单元之间的位置；或者，电池串的背面，并采用绝缘材料进行隔离。
  7. 根据权利要求5或6所述的新型切片光伏组件，其特征在于：所述跳线(8)在组件正常状态下不传输电流。
  8. 根据权利要求5或6所述的新型切片光伏组件，其特征在于：所述旁路二极管分别被布置在于组件的两个长边边缘，其中有两个旁路二极管彼此相邻的可集成在一个线盒或者各自集成在两个线盒中，另外一个旁路二极管单独集成在线盒中。
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CN107275420A (zh) * 2017-07-12 2017-10-20 无锡尚德太阳能电力有限公司 一种半切片光伏组件电路及半切片光伏组件
CN208422933U (zh) * 2018-06-21 2019-01-22 苏州阿特斯阳光电力科技有限公司 光伏组件
CN208923172U (zh) * 2018-09-28 2019-05-31 泰州隆基乐叶光伏科技有限公司 光伏组件
CN110047963A (zh) * 2019-04-19 2019-07-23 泰州隆基乐叶光伏科技有限公司 光伏组件电路单元、光伏组件电路及光伏组件
CN110165009A (zh) * 2019-05-05 2019-08-23 泰州隆基乐叶光伏科技有限公司 一种光伏组件及组件串
CN110459637A (zh) * 2019-09-18 2019-11-15 天合光能股份有限公司 一种新型切片光伏组件

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