CN111446322A - High-power non-hot spot effect assembly - Google Patents
High-power non-hot spot effect assembly Download PDFInfo
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- CN111446322A CN111446322A CN202010220306.3A CN202010220306A CN111446322A CN 111446322 A CN111446322 A CN 111446322A CN 202010220306 A CN202010220306 A CN 202010220306A CN 111446322 A CN111446322 A CN 111446322A
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- 230000000694 effects Effects 0.000 title claims abstract description 24
- 239000004020 conductor Substances 0.000 claims abstract description 52
- 239000011159 matrix material Substances 0.000 claims abstract description 4
- 238000010248 power generation Methods 0.000 abstract description 12
- 238000003466 welding Methods 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 4
- 239000012528 membrane Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 238000005538 encapsulation Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
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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
- 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
- H01L31/0508—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 the interconnection means having a particular shape
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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
- H01L31/054—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means
- H01L31/0547—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means comprising light concentrating means of the reflecting type, e.g. parabolic mirrors, concentrators using total internal reflection
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- 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
- Y02E10/52—PV systems with concentrators
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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)
- Photovoltaic Devices (AREA)
Abstract
The invention relates to a high-power non-hot spot effect assembly which comprises a solar cell, wherein the solar cell is formed by connecting a plurality of strings of cells in a matrix arrangement in series, the plurality of strings of cells are formed by connecting a plurality of cells in series, an electric conductor is electrically connected between two adjacent cells in each string of cells, a reflecting structure is arranged on the electric conductor, and the two adjacent electric conductors are electrically connected through a diode. According to the solar module, the I-shaped electric conductors are arranged between the adjacent battery pieces, the reflecting structures on the electric conductors fully utilize the gap light of the battery piece serial spacing and the battery piece spacing, the module power is improved, the increase of the serial resistance caused by the lengthening of a welding strip due to the increase of the gap is reduced, meanwhile, the risk of the hot spot effect of the solar battery is avoided by the diodes connected with the battery pieces in parallel, and the module power generation efficiency is improved; the diodes are arranged at the two ends of the conductor to carry out double protection on the circuit and prevent the hot spot effect.
Description
Technical Field
The invention relates to the technical field of solar cells, in particular to a high-power component without a hot spot effect.
Background
The photovoltaic module market mainly uses crystal silicon subassembly as the main, and in order to reduce subassembly hot spot effect, the mainstream subassembly is placed three diode in the terminal box, and every two strings of batteries are in series-parallel connection and are had a diode, and when having the battery piece to damage or being sheltered from in these two strings, the diode will open, falls these two strings of bypasses to 4 strings of batteries can also normally work in addition. The generated power of the assembly is reduced only 1/3.
The structure of traditional subassembly from the front to the back is positive glass in proper order, go up encapsulation glued membrane, the battery cluster, lower encapsulation glued membrane, back of the body glass or backplate, between battery piece and the piece, leave the clearance between cluster and the cluster, someone proposes to adopt the reflective membrane to paste and increases the subassembly power in the clearance of subassembly piece interval and cluster interval, but its operation is more difficult, easily cause reflective membrane skew phenomenon in the preparation engineering, the yield is lower, along with the expansion of battery piece and battery piece interval in addition, the interconnection strip also can lengthen thereupon, the resistance of subassembly also can grow thereupon.
Disclosure of Invention
The invention provides a high-power non-hot spot effect assembly for solving the problem of low light utilization rate at a gap of a solar cell, which comprises the solar cell, wherein the solar cell is formed by connecting a plurality of strings of cell strings in a matrix arrangement in series, the plurality of strings of cell strings are formed by connecting a plurality of cell sheets in series, a conductor is electrically connected between two adjacent cell sheets in each cell string, a reflecting structure is arranged on the conductor, and the two adjacent conductors are electrically connected through a diode.
Preferably, the battery pieces are connected in series through interconnection bars, and the electric conductors are electrically connected with the interconnection bars. The electric conductors are welded on the interconnection strips and are conducted with the interconnection strips, and two adjacent electric conductors are connected with the diode in series, so that the diode is connected on the battery piece conducted with the two adjacent electric conductors in parallel, and the hot spot effect is prevented.
Further, in order to prevent two adjacent electric conductors from contacting and causing short circuit, the distance between two adjacent battery strings is 6-26mm, and the distance between two adjacent battery sheets in one battery string is 5.5-25 mm. In the string of the solar cells, the distance between two adjacent solar cells is 5.5-25mm, so that the distance is increased, light in the gap can be fully utilized, and the problem of increased string resistance caused by the increased distance is effectively solved, the power of the solar cells is improved, and the power generation benefit of the whole solar cells is improved.
Preferably, bus bars for connecting a circuit are arranged at two ends of the solar cell, and the reflecting structure is arranged on the bus bars. The reflecting structure on the bus bar reflects one part of light irradiated by solar rays to the glass, then reflects the light to the cell, and reflects the light to the cell between the other parts, so that the utilization rate of the light is improved.
Further, the reflecting structure is a reflecting film.
Preferably, the reflective structure is a zigzag or arc-shaped ridge. The convex reflecting surface corresponds to the position of the battery piece, and the reflecting surface reflects light rays onto the battery piece, so that the light ray utilization rate is improved.
Furthermore, in order to enable the light receiving surface to correspond to the position of the cell slice, the length direction of the convex strip is parallel to the edge of the adjacent cell slice. The reflecting surface of the convex strip is over against the battery piece, so that the reflecting efficiency is improved, and the light utilization rate is finally improved.
Preferably, the conductive body includes a main body portion and two connecting portions respectively disposed at two ends of the main body portion, the main body portion is disposed in a gap between two adjacent battery pieces in one battery string, the connecting portions are disposed in a gap between two adjacent battery strings, the connecting portions at two ends of the adjacent conductive body in one battery string correspond to each other, and the corresponding connecting portions are electrically connected through the diodes, so that a structure is formed in which two diodes are connected in parallel to two sides of each battery piece through the conductive body.
Further, the direction from the anode to the cathode of the diode is opposite to the direction from the anode to the cathode of the battery piece connected with the diode in parallel. In order to prevent the hot spot effect of the battery plate, a diode is connected beside the battery plate in parallel.
Preferably, the electric conductors at two ends of each battery string are U-shaped, and the electric conductors between the battery sheets in each battery string are I-shaped. Two ends of the I-shaped conductor are respectively connected with a diode in series, when one diode is damaged, the other diode can work to carry out double protection on the circuit, and the hot spot effect is effectively prevented.
Has the advantages that: according to the solar module, the I-shaped electric conductors are arranged between the adjacent battery pieces, the reflecting structures on the electric conductors fully utilize the gap light between the series spacing and the piece spacing of the battery pieces, the power of the module is improved, the electric conductors connect the interconnecting strips consisting of five wires in parallel, so that the series resistance is reduced, the problem of increase of the series resistance caused by increase of the gap is solved, meanwhile, the diode connected with the battery pieces in parallel avoids the risk of hot spot effect of the solar battery, and the power generation efficiency of the module is improved; the diodes are arranged at the two ends of the conductor to carry out double protection on the circuit and prevent the hot spot effect.
Drawings
FIG. 1 is a schematic front view of the overall structure of the present invention;
FIG. 2 is a schematic view of the electrical conductor structure of the present invention;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;
FIG. 4 is a cross-sectional view taken along line B-B of FIG. 2;
FIG. 5 is a schematic diagram of a series of battery strings according to the present invention;
1. a battery piece; 2. a bus bar; 3. an electrical conductor; 4. a diode; 5. an interconnection bar; 6. a convex strip; 7. a battery string; 8. a connecting portion; 9. a main body portion.
Detailed Description
Example one
As shown in the figure, the high-power non-hot spot effect assembly comprises a solar cell, wherein the solar cell is formed by connecting a plurality of strings of cell strings 7 which are arranged in a matrix in series, the plurality of strings of cell strings 7 are formed by connecting a plurality of cell sheets 1 in series, two adjacent cell sheets 1 are electrically connected with a conductor 3, the conductor 3 is provided with a reflection structure, and the two adjacent conductor 3 are electrically connected through a diode 4. The cell 1 is connected with the cell 1 in series through an interconnection bar 5, and the conductor 3 is welded on the interconnection bar 5. The distance between two adjacent battery strings 7 is 6-26mm, and in one battery string 7, the distance between two adjacent battery sheets 1 is 5.5-25 mm. The solar cell is characterized in that bus bars 2 used for connecting the cell strings 7 in series are arranged at two ends of the solar cell, and the reflecting structures are arranged on the bus bars 2. The reflecting structure is a reflecting film. The reflecting structure is a sawtooth-shaped or arc-shaped convex strip 6. In the present embodiment, the protruded strips 6 are illustrated as zigzag, and as shown in fig. 2 to 4, the longitudinal direction of the protruded strips 6 is parallel to the edge of the adjacent battery piece 1.
The electric conductor 3 comprises a main body part 9 and two connecting parts 8 respectively arranged at two ends of the main body part 9, the main body part 9 is arranged in a gap between two adjacent battery pieces 1 in one battery string 7, the connecting parts 8 are arranged in a gap between two adjacent battery strings 7, the connecting parts 8 at two ends of the electric conductor 3 adjacent to each other in one battery string 7 correspond to each other, and the corresponding connecting parts 8 are electrically connected through the diodes 4, so that a structure that two diodes 4 are connected in parallel on two sides of each battery piece 1 through the electric conductor 3 is formed. In the prior art, in the same battery string 7, the inter-cell distance between two adjacent battery pieces 1 is generally 2-4mm, the inter-cell distance between two most conventional adjacent battery pieces 1 is 3mm, and the inter-cell distance between two adjacent battery pieces 1 is increased, which can cause the increase of the series resistance, now the series resistance can be reduced only by reducing the inter-cell distance between two adjacent battery pieces 1, the power generation is improved, the reduction of the inter-cell distance causes the light energy in the inter-cell distance to be unavailable, and the inter-cell distance is too small to perform the operations such as welding, the invention reflects the light to the battery pieces 1 by enlarging the piece spacing between two adjacent battery pieces 1 and utilizing the light in the piece spacing between two adjacent battery pieces 1, meanwhile, the electric conductor 3 is connected with the interconnection strip 5 consisting of five wires, and the five wires in the interconnection strip 5 are connected in parallel, so that the series resistance is reduced, and the power generation efficiency and the benefit of the battery piece 1 are improved.
Comparative experiment:
the solar cells were placed in the same place for comparative experiments:
the standard component 1 is the prior art, wherein solar cells are composed of 6 strings of cell strings 7, each string of cell string 7 is composed of 10 cells 1, the distance between two adjacent strings of cell strings 7 is 11mm, the distance between two adjacent cells 1 in the same string of cell string 7 is 11mm, the size of each cell 1 is 156.75 × 156.75.75 mm, no conductor 3 exists between the adjacent cells 1 in the same string of cell string 7, no reflective structure exists at the gap between the adjacent cells 1 and the cell 1, and no diode 4 is connected in parallel on each cell 1.
Standard Module 2 differs from Standard Module 1 in that: the same conductor 3 as the first embodiment is electrically connected to the interconnection strip 5 between the two adjacent battery pieces 1 in the same battery string 7, the two adjacent conductors 3 are not connected, the conductor 3 has a reflection structure (here, an arc-shaped protrusion is used), the diode 4 is not connected in parallel to each battery piece 1, and the others are the same as the standard component 1.
Comparison component 4: the differences compared to the module 1 are: the distance between two adjacent battery plates 1 in the same battery string 7 is replaced by 2mm, and the rest is the same as that of the standard component 1.
Comparison component 5: the differences compared to comparative assembly 4 are: the distance between two adjacent battery plates 1 in the same battery string 7 is 11mm, and the electric conductor 3 which is the same as the above embodiment is electrically connected to the interconnection strip 5 between two adjacent battery plates 1 and the battery plate 1 in the same battery string 7, but the electric conductor 3 has no light reflecting structure, and the diode 4 is not connected in parallel on each battery plate 1.
The test results are given in the following table:
the chart is a comparison analysis of each scheme, and by comparing the standard component 1, the standard component 2 and the comparison component 3, the power gain of the solar cell with the diode 4 is 0.31% compared with the power gain of the solar cell without the diode 4 under the condition of no shielding, and the power gain of the solar cell with the diode 4 is 1.56% compared with the prior art. Under the condition of no shielding, the power generation gain of the solar cell with the diode 4 is 2.11 percent compared with the solar cell without the diode 4, and the power generation gain of the solar cell is 2.46 percent compared with the prior art. Under the condition of shielding one battery, the solar battery with the diode 4 has a power generation gain of 33.85 percent compared with the solar battery without the diode 4, and the power generation gain of the solar battery is 34.5 percent compared with the prior art. Therefore, the diode 4 is connected in parallel on each cell 1, the electric conductor 3 is electrically connected between the adjacent cell 1 and the cell 1 in the same cell string 7, the reflection structure on the electric conductor 3 is beneficial to improving the power generation of the cell,
by comparing the comparison component 4 and the comparison component 5, it can be known that: the power generation amount of the comparison component 4 is the same as that of the comparison component 5 under each condition, so that the scheme of reducing the distance between two adjacent battery pieces 1 in the same battery string 7 and the scheme of electrically connecting the electric conductors 3 on the interconnection strips 5 increase the distance between two adjacent battery pieces 1 in the same battery string 7 have the effect of reducing the series resistance, and the effects are basically consistent. The invention also arranges a reflecting structure on the conductor 3, which can fully utilize the light energy at the gap between the cell 1 and between the cell 7 and the cell 7, and improve the power generation of the cell.
Claims (10)
1. A high power non-speckle effect assembly, comprising: the solar cell comprises a solar cell, wherein the solar cell is formed by connecting a plurality of strings of cell strings (7) which are arranged in a matrix in series, the plurality of strings of cell strings (7) are formed by connecting a plurality of cell sheets (1) in series, each adjacent two of the cell strings (7) are electrically connected with an electric conductor (3) between the cell sheets (1), the electric conductor (3) is provided with a reflection structure, and the adjacent two of the electric conductors (3) are electrically connected through a diode (4).
2. The high power athermal effect assembly of claim 1, wherein: the battery piece (1) is connected with the battery piece (1) in series through an interconnection bar (5), and the electric conductor (3) is electrically connected with the interconnection bar (5).
3. The high power athermal effect assembly of claim 1, wherein: the space between two adjacent battery strings (7) is 6-26mm, and the space between two adjacent battery sheets (1) in one battery string (7) is 5.5-25 mm.
4. The high power athermal effect assembly of claim 1, wherein: the solar cell is characterized in that bus bars (2) used for connecting the cell strings (7) in series are arranged at two ends of the solar cell, and the reflecting structures are arranged on the bus bars (2).
5. The high power athermal assembly of claim 1 or 4, wherein: the reflecting structure is a reflecting film.
6. The high power athermal assembly of claim 1 or 4, wherein: the reflecting structure is a sawtooth-shaped or arc-shaped convex strip (6).
7. The high power athermal effect assembly of claim 6, wherein: the length direction of the convex strip (6) is parallel to the edge of the battery piece (1) adjacent to the conductor (3).
8. The high power athermal effect assembly of claim 1, wherein: the electric conductor (3) comprises a main body part (9) and two connecting parts (8) which are respectively arranged at two ends of the main body part (9), the main body part (9) is arranged in a gap between two adjacent battery sheets (1) in one battery string (7), the connecting parts (8) are arranged in a gap between two adjacent battery strings (7), the connecting parts (8) at two ends of the electric conductor (3) adjacent to each other in one battery string (7) are corresponding, the corresponding connecting parts (8) are electrically connected through the diodes (4), and a structure that two diodes (4) are connected in parallel on two sides of each battery sheet (1) through the electric conductor (3) is formed.
9. The high power athermal effect assembly of claim 8, wherein: the direction from the anode to the cathode of the diode (4) is opposite to the direction from the anode to the cathode of the battery piece (1) connected with the diode (4) in parallel.
10. The high power athermal effect assembly of claim 8, wherein: the electric conductors (3) positioned at two ends of each battery string (7) are U-shaped, and the electric conductors (3) positioned between the battery sheets (1) in each battery string (7) and the battery sheets (1) are I-shaped.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010220306.3A CN111446322A (en) | 2020-03-25 | 2020-03-25 | High-power non-hot spot effect assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010220306.3A CN111446322A (en) | 2020-03-25 | 2020-03-25 | High-power non-hot spot effect assembly |
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| CN111446322A true CN111446322A (en) | 2020-07-24 |
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| CN202010220306.3A Pending CN111446322A (en) | 2020-03-25 | 2020-03-25 | High-power non-hot spot effect assembly |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20150084554A (en) * | 2014-01-14 | 2015-07-22 | 엘지전자 주식회사 | Solar cell module |
| JP2017183651A (en) * | 2016-03-31 | 2017-10-05 | 三菱ケミカル株式会社 | Solar battery module |
| WO2018061789A1 (en) * | 2016-09-29 | 2018-04-05 | パナソニックＩｐマネジメント株式会社 | Solar cell module |
| CN108010978A (en) * | 2018-01-22 | 2018-05-08 | 保定嘉盛光电科技股份有限公司 | BIPV is without hot spot full-glass component and manufacture method |
| CN208190598U (en) * | 2018-05-14 | 2018-12-04 | 阿特斯阳光电力集团有限公司 | Photovoltaic module |
| CN211789055U (en) * | 2020-03-25 | 2020-10-27 | 常州亚玛顿股份有限公司 | High-power non-hot spot effect assembly |
-
2020
- 2020-03-25 CN CN202010220306.3A patent/CN111446322A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20150084554A (en) * | 2014-01-14 | 2015-07-22 | 엘지전자 주식회사 | Solar cell module |
| JP2017183651A (en) * | 2016-03-31 | 2017-10-05 | 三菱ケミカル株式会社 | Solar battery module |
| WO2018061789A1 (en) * | 2016-09-29 | 2018-04-05 | パナソニックＩｐマネジメント株式会社 | Solar cell module |
| CN108010978A (en) * | 2018-01-22 | 2018-05-08 | 保定嘉盛光电科技股份有限公司 | BIPV is without hot spot full-glass component and manufacture method |
| CN208190598U (en) * | 2018-05-14 | 2018-12-04 | 阿特斯阳光电力集团有限公司 | Photovoltaic module |
| CN211789055U (en) * | 2020-03-25 | 2020-10-27 | 常州亚玛顿股份有限公司 | High-power non-hot spot effect assembly |
Non-Patent Citations (1)
| Title |
|---|
| 杨江海;龚露;蒋忠伟;孙小菩;: "热斑效应原理简介及模拟实验", 绿色环保建材, no. 08, 25 August 2017 (2017-08-25) * |
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