CN115425104A - Solar energy IBC battery pack with hidden bus bar - Google Patents
Solar energy IBC battery pack with hidden bus bar Download PDFInfo
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- CN115425104A CN115425104A CN202211094797.7A CN202211094797A CN115425104A CN 115425104 A CN115425104 A CN 115425104A CN 202211094797 A CN202211094797 A CN 202211094797A CN 115425104 A CN115425104 A CN 115425104A
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- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 2
- 210000004027 cell Anatomy 0.000 description 82
- 229910000679 solder Inorganic materials 0.000 description 8
- 238000003466 welding Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 230000008901 benefit Effects 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 101001073212 Arabidopsis thaliana Peroxidase 33 Proteins 0.000 description 1
- 101001123325 Homo sapiens Peroxisome proliferator-activated receptor gamma coactivator 1-beta Proteins 0.000 description 1
- 102100028961 Peroxisome proliferator-activated receptor gamma coactivator 1-beta Human genes 0.000 description 1
- 210000003850 cellular structure Anatomy 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002994 raw material 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
- H01L31/0516—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 specially adapted for interconnection of back-contact solar cells
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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
- 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
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/30—Electrical components
- H02S40/36—Electrical components characterised by special electrical interconnection means between two or more PV modules, e.g. electrical module-to-module connection
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/10—Photovoltaic [PV]
-
- 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
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- Condensed Matter Physics & Semiconductors (AREA)
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Photovoltaic Devices (AREA)
Abstract
The invention discloses a solar IBC battery assembly with a hidden bus bar. The solar IBC battery assembly comprises two solar IBC battery series subassemblies and a first bus bar arranged on the back of a battery, wherein the first bus bar connects the two solar IBC battery series subassemblies in parallel, each solar IBC battery series subassembly comprises a plurality of series IBC battery string groups, each IBC battery string group comprises two series IBC battery string units, and each IBC battery string unit comprises a plurality of series half IBC batteries. The bus bar connecting the half IBC battery string unit and the battery string group is arranged on the back of the half IBC battery, so that the size of the module can be reduced, the conversion efficiency of the module can be improved, the blank of the conventional IBC module is eliminated or reduced, and the appearance attractiveness of the module is improved; due to the fact that the size of the model is reduced, the cost of component materials is reduced, and new products and choices are provided for building and component type selection of the distributed photovoltaic power station.
Description
Technical Field
The invention belongs to the technical field of photovoltaic modules, and particularly relates to a solar IBC battery module with a hidden bus bar.
Background
With the development of photovoltaic module technology, photovoltaic modules are widely used at present. In the construction process of the distributed photovoltaic power station, due to the fact that the usable area of a roof or a factory building top is limited, users mostly select high-power and high-conversion-efficiency photovoltaic products with attractive and elegant appearance when the components are selected. The existing market still has a high share of PERC battery components, and the problems of white (waist line) in the middle of the appearance of the components and the like exist, so that the final benefit and the optimal ornamental value of a distributed photovoltaic power station are influenced; especially, in a household distributed photovoltaic power station, a photovoltaic component and a building need to be integrally designed and built in the future, and more severe requirements are provided for the appearance of the photovoltaic component.
As shown in fig. 1, a bus bar (shown in an oval area) is arranged in the middle area of a photovoltaic module in the prior art to converge the current of upper and lower battery plates, so that the gap between the middle areas is large, the bus bar can be seen from the front side of the battery module, that is, the middle of the module appearance is blank, which affects the appearance.
Disclosure of Invention
(I) technical problems to be solved by the invention
The technical problem solved by the invention is as follows: how to improve the appearance aesthetic measure of the photovoltaic cell component.
(II) the technical scheme adopted by the invention
A solar IBC cell assembly with hidden bus bars, the solar IBC cell assembly comprises two solar IBC cell series subassemblies and a first bus bar arranged on the back of a cell, the first bus bar connects the two solar IBC cell series subassemblies in parallel, each solar IBC cell series subassembly comprises a plurality of IBC cell string groups connected in series, each IBC cell string group comprises two IBC cell string units connected in series, and each IBC cell string unit comprises a plurality of half IBC cells connected in series.
Preferably, half IBC cells of each IBC cell string unit are distributed in a row, and the IBC cell string units in each solar IBC cell series subassembly are arranged side by side.
Preferably, the first bus bar is located between two solar IBC cell series subassemblies, and the two solar IBC cell series subassemblies are symmetrically distributed with the first bus bar as a symmetry axis.
Preferably, the series connection between each IBC cell string group in each solar IBC cell series subassembly is realized through the first bus bar.
Preferably, each pair of IBC cell string groups located on both sides of the first bus bar shares the first bus bar.
Preferably, each IBC battery string group further includes a second bus bar disposed at a rear surface of the battery, the second bus bar connecting the IBC battery string units in each IBC battery string group in series; the second bus bar and the first bus bar are respectively positioned at two opposite ends of the IBC battery string unit.
Preferably, the solar IBC cell series subassembly further comprises a plurality of insulating bars, a portion of the insulating bars being disposed between the first bus bars and the cell back side, and another portion of the insulating bars being disposed between the second bus bars and the cell back side.
Preferably, the solar IBC cell series subassembly further includes bypass diodes connected in parallel with each of the IBC cell series groups in a one-to-one correspondence, and the bypass diodes are disposed at a middle position of the back surface of the subassembly.
Preferably, each bypass diode is connected in parallel with the IBC cell string through the first bus bar.
(III) advantageous effects
The invention discloses a solar energy IBC battery component with a hidden bus bar, which has the following technical effects compared with the prior art:
on the basis of the original half IBC battery assembly mechanism, the bus bar connecting the half IBC battery string unit and the battery string group is arranged on the back of the half battery, so that the size of the assembly model can be reduced, the conversion efficiency of the assembly is improved, the blank (waist line) of the conventional IBC assembly is eliminated, and the appearance attractiveness of the assembly is improved; due to the fact that the size of the model is reduced, the cost of component materials is reduced, and new products and choices are provided for building and component type selection of the distributed photovoltaic power station.
Drawings
FIG. 1 is a schematic view of a photovoltaic module according to the prior art;
fig. 2 is a schematic diagram of a solar IBC cell module with a hidden bus bar according to a first embodiment of the present invention;
fig. 3 is a schematic diagram of an IBC battery string according to a first embodiment of the present invention;
FIG. 4 is an enlarged view of a portion of FIG. 3 at A;
fig. 5 is a partially enlarged view of fig. 2 at B.
Reference numerals:
100-solar IBC cell series subassembly, 200-first bus bar, 10-IBC cell string, 11-IBC cell string unit, 12-second bus bar, 110-half IBC cell, 30-solder strip, 40-insulating strip, 50-bypass diode mounting position.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Before describing in detail various embodiments of the present application, the technical concepts of the present application are first briefly described: the middle area of the photovoltaic module is provided with the bus bar to realize the bus bar of the upper cell and the lower cell in the prior art, and the gap of the middle area is large, so that the blank can be caused, and the appearance is influenced. Therefore, the solar IBC battery pack with the hidden bus bar provided by the application is provided with two solar IBC battery series subassemblies in parallel through the first bus bar arranged on the back surface of the battery, so that under the premise of playing the effect of the existing middle bus bar, the blank is avoided, and the attractiveness of the photovoltaic module is improved.
Specifically, as shown in fig. 2, the solar IBC cell module with hidden bus bars according to the first embodiment includes two solar IBC cell series subassemblies 100 and a first bus bar 200 disposed on the back surface of the cell, where the first bus bar 200 connects the two solar IBC cell series subassemblies 100 in parallel, each solar IBC cell series subassembly 100 includes a plurality of IBC cell string groups 10 connected in series, each IBC cell string group 10 includes two IBC cell string units 11 connected in series, and each IBC cell string unit includes a plurality of half IBC cells 110 connected in series.
As shown in fig. 3, all the half IBC cells 110 of each IBC cell string unit 11 are distributed in a row, wherein every two adjacent half IBC cells 110 in each IBC cell string unit 11 are connected in series by stitch welding or in series by non-stitch welding. When the stitch welding series connection mode is adopted, the stitch welding width L2 is 0.5 mm to 1 mm, and when the non-stitch welding series connection mode is adopted, the gap width L1 of the two adjacent half IBC cells 110 is 0.5 mm to 1.5 mm.
Further, as shown in fig. 4, each IBC battery string group 10 further includes a second bus bar 12 disposed on the rear surface of the battery, and the second bus bar 12 connects the IBC battery string cells 11 in each IBC battery string group 10 in series.
Illustratively, the first bus bar 200 is located between the two solar IBC cell series subassemblies 100, and the two solar IBC cell series subassemblies 100 are symmetrically distributed with the first bus bar 200 as a symmetry axis. As shown in fig. 5, the central portion of the first bus bar 200 covers the gap L3 of the two solar IBC cell series subassemblies 100, and both sides of the first bus bar 200 overlap the edges of the two solar IBC cell series subassemblies 100, respectively.
Further, the IBC cell string groups 10 in each solar IBC cell series subassembly 100 are connected in series through the first bus bar 200. On the other hand, since both sides of the first bus bar 200 overlap with the edges of the two solar IBC cell series subassemblies 100, respectively, each pair of IBC cell string groups located on both sides of the first bus bar 200 share the first bus bar.
Illustratively, the first bus bar 200 is conducted with the grid line of the corresponding half IBC battery 110 through the solder strip 30, so as to realize the bus of the battery piece, and at the same time, the first bus bar 200 is fixed on the half IBC battery 110 through the solder strip 30. As shown, the half IBC cells 110 in the solar IBC cell series subassembly 100 on the upper half side are connected to the first bus bar 200 by the solder ribbon 30, with the ends of the solder ribbon 30 at the center of the first bus bar 200; the half IBC cells 110 in the solar IBC cell series subassembly 100 on the lower half are connected to the first bus bars 200 by the solder ribbons 30, with the ends of the solder ribbons 30 at the center of the first bus bars 200 and with the solder ribbons 30 connecting the upper and lower half IBC cells 110 being staggered.
Because the half IBC cells 110 of upper and lower both sides share first busbar 200, can reduce the clearance of the half IBC cell 110 of upper and lower both sides, can play the effect of hiding first busbar 200, avoid leaving white in the middle of the photovoltaic module, make the whole size of the solar IBC cell module of hiding the area of converging simultaneously reduce, reduced the subassembly area to promote conversion efficiency.
The position of the first bus bar 200 is optional and not limited. In other embodiments, the first bus bar 200 may be disposed on the back side of one of the solar IBC cell series subassemblies 100, which also achieves the parallel and series effects described above, and also achieves the hiding effect of the first bus bar 200. In addition, the number of the first bus bars 200 is determined according to the number of the IBC cell string groups 10.
Further, the first bus bars 200 and the second bus bars 12 are respectively located at two opposite ends of the IBC battery string unit 11, and all the first bus bars 200 are located on the same straight line, and all the second bus bars 12 are located on the same straight line.
Further, the solar IBC cell module with the hidden bus bars further includes a plurality of insulation bars 40, a portion of the insulation bars 40 is disposed between the first bus bar 200 and the back surface of the cell, another portion of the insulation bars 40 is disposed between the second bus bar 12 and the back surface of the cell, and the first bus bar 200 and the second bus bar 12 can be isolated from the back surface of the cell by the insulation bars 40.
Further, the solar IBC cell module with the hidden bus bars further includes bypass diodes (not shown) connected in parallel with each IBC cell string group 10 in a one-to-one correspondence, and the bypass diodes are disposed at a middle position on the back surface of the module. Illustratively, each bypass diode is connected in parallel with the IBC cell string 10 by a first bus bar 200, as shown in fig. 2 and 5, and 50 denotes a mounting position of the bypass diode. Each bypass diode controls a certain number of half IBC batteries, so that mismatch loss caused by series resistance can be reduced, assembly short-circuit current is reduced, and hot spot risk and internal loss are lower.
Illustratively, each solar IBC cell series subassembly 100 in the solar IBC cell assembly of the hidden bus bar in fig. 2 includes 3 IBC cell series groups 10, each IBC cell series unit 11 includes 10 half IBC cells 110 connected in series, adjacent half IBC cells 110 are connected in series by stitch welding, the stitch welding width is 0.5 mm, the gap width L3 of two adjacent rows of IBC cell series units 11 is 2 mm, and the gap width of the solar IBC cell series subassembly 100 is 2 mm.
The solar IBC battery component with the hidden bus bar has the following advantages:
1. according to the solar IBC battery assembly with the hidden bus bars, the middle bus bars are arranged on the back of the battery, so that the blank influence caused by the middle bus bars of the original half IBC assembly structure is eliminated, and the assembly is better in appearance consistency, more exquisite and more elegant;
2. according to the solar IBC battery module with the hidden bus bars, the size of the module is reduced, the area is reduced by 2.8%, and the conversion efficiency is improved by 0.8%;
3. the solar IBC battery module with the hidden bus bar has the advantages that the size of a plate is reduced, the number of used raw materials is less, and the cost is reduced by about 0.01 yuan/W.
Although a few embodiments of the present invention have been shown and described, it would be appreciated by those skilled in the art that changes may be made in this embodiment without departing from the principles and spirit of the invention, the scope of which is defined in the claims and their equivalents.
Claims (9)
1. A solar IBC battery assembly with hidden bus strips is characterized in that the solar IBC battery assembly with hidden bus strips comprises two solar IBC battery series subassemblies and a first bus bar arranged on the back of a battery, the first bus bar connects the two solar IBC battery series subassemblies in parallel, each solar IBC battery series subassembly comprises a plurality of IBC battery string groups connected in series, each IBC battery string group comprises two IBC battery string units connected in series, and each IBC battery string unit comprises a plurality of half IBC batteries connected in series.
2. The solar IBC cell assembly of a hidden bus bar of claim 1, wherein the half IBC cells of each IBC cell string unit are distributed in a row, and the individual IBC cell string units within each solar IBC cell series subassembly are arranged side by side.
3. The solar IBC cell assembly of hidden bus bars as claimed in claim 2, wherein the first bus bar is located between two solar IBC cell series subassemblies, and the two solar IBC cell series subassemblies are symmetrically distributed with the first bus bar as a symmetry axis.
4. The solar IBC cell assembly of hidden bus bars of claim 3, wherein series connection between individual IBC cell string groups within each solar IBC cell series subassembly is achieved through the first bus bar.
5. The solar IBC cell assembly of hidden bus bars of claim 3, wherein each pair of IBC cell string groups on both sides of the first bus bar share the first bus bar.
6. The solar IBC cell assembly with hidden bus bars according to claim 2, wherein each IBC cell string group further comprises a second bus bar disposed on the back side of the cell, the second bus bar connecting the IBC cell string units in each IBC cell string group in series; the second bus bar and the first bus bar are respectively located at two opposite ends of the IBC battery string unit.
7. The solar IBC cell module with hidden bus bars according to claim 6, wherein the solar IBC cell series subassembly further comprises a plurality of insulating bars, one portion of the insulating bars being disposed between the first bus bars and the cell back side, and another portion of the insulating bars being disposed between the second bus bars and the cell back side.
8. The solar IBC cell module with hidden bus bars as claimed in claim 1, wherein the solar IBC cell series subassembly further comprises bypass diodes disposed in parallel with each of the IBC cell string groups in a one-to-one correspondence, and the bypass diodes are disposed at a middle position on the back surface of the module.
9. The solar IBC cell assembly of hidden bus bars of claim 8, wherein each bypass diode is connected in parallel with the IBC cell string group through the first bus bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211094797.7A CN115425104A (en) | 2022-09-08 | 2022-09-08 | Solar energy IBC battery pack with hidden bus bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211094797.7A CN115425104A (en) | 2022-09-08 | 2022-09-08 | Solar energy IBC battery pack with hidden bus bar |
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| CN115425104A true CN115425104A (en) | 2022-12-02 |
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| CN202211094797.7A Pending CN115425104A (en) | 2022-09-08 | 2022-09-08 | Solar energy IBC battery pack with hidden bus bar |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116504863A (en) * | 2023-06-28 | 2023-07-28 | 国家电投集团黄河上游水电开发有限责任公司 | Full-black back contact solar cell module and preparation method thereof |
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2022
- 2022-09-08 CN CN202211094797.7A patent/CN115425104A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116504863A (en) * | 2023-06-28 | 2023-07-28 | 国家电投集团黄河上游水电开发有限责任公司 | Full-black back contact solar cell module and preparation method thereof |
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