CN110829976A - Photovoltaic module bus bar mounting system and mounting method - Google Patents
Photovoltaic module bus bar mounting system and mounting method Download PDFInfo
- Publication number
- CN110829976A CN110829976A CN201911310787.0A CN201911310787A CN110829976A CN 110829976 A CN110829976 A CN 110829976A CN 201911310787 A CN201911310787 A CN 201911310787A CN 110829976 A CN110829976 A CN 110829976A
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- CN
- China
- Prior art keywords
- bus bar
- photovoltaic module
- insulating heat
- junction box
- shrinkable sleeve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 9
- 238000003466 welding Methods 0.000 claims abstract description 14
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052802 copper Inorganic materials 0.000 claims abstract description 11
- 239000010949 copper Substances 0.000 claims abstract description 11
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 claims description 15
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 15
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 15
- 239000011521 glass Substances 0.000 claims description 6
- 239000003292 glue Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000002313 adhesive film Substances 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims description 2
- 238000010248 power generation Methods 0.000 abstract description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 1
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- UIPVMGDJUWUZEI-UHFFFAOYSA-N copper;selanylideneindium Chemical compound [Cu].[In]=[Se] UIPVMGDJUWUZEI-UHFFFAOYSA-N 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229920006342 thermoplastic vulcanizate Polymers 0.000 description 1
Images
Classifications
-
- 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
- H02S40/34—Electrical components comprising specially adapted electrical connection means to be structurally associated with the PV module, e.g. junction boxes
-
- 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
Landscapes
- Photovoltaic Devices (AREA)
Abstract
The invention provides a photovoltaic module junction belt mounting system and a photovoltaic module junction belt mounting method.A heat-insulating shrink sleeve is sleeved at one end of a junction belt led out from a photovoltaic module, one end of the heat-insulating shrink sleeve extends into a photovoltaic module backboard and is fused with an EVA backboard of the photovoltaic module into a whole, then the heat-insulating shrink sleeve penetrates through a slit of a junction box together, and the end part of the junction belt is welded and fixed with a copper plate terminal welding area in a box body; or the electrical safety requirement under the environment of higher voltage application is met under the condition that the junction box is not changed, so that the existing junction box can be applied to a photovoltaic module with higher power generation efficiency, a new junction box does not need to be redesigned and produced, and the production cost is reduced.
Description
Technical Field
The invention relates to the technical field of solar photovoltaic power generation, in particular to a photovoltaic module bus bar mounting system and a photovoltaic module bus bar mounting method capable of improving electrical safety performance.
Background
In order to solve the increasingly severe problem of environmental pollution caused by the use of traditional fossil energy, the green renewable energy industry has been rapidly developed in recent years, and a solar cell power generation technology for generating power by using the photovoltaic effect is an important green energy technology. The solar cell is made of materials capable of generating photovoltaic effect, such as silicon, gallium arsenide, indium selenium copper and the like, and can convert light energy into electric energy. At present, a photovoltaic module formed by combining a plurality of solar cells is widely applied to various photovoltaic power generation systems of buildings as a basic photovoltaic power generation unit, or a transparent film module is used as a curtain wall material of the buildings to build an energy-saving environment-friendly building. In order to improve the power generation efficiency per unit area, various photovoltaic modules with novel efficient structures are continuously developed and applied, for example, modules capable of generating power on two sides, shingle modules and the like are already in large-scale use.
In practical use, the junction box is required to lead out the electric energy generated by the photovoltaic module to be connected with an external load. Therefore, the photovoltaic module junction box is a key component of the photovoltaic module for constructing various power generation systems, and is generally directly attached to the surface of the module. For the novel double-glass photovoltaic module with higher power generation efficiency, the module is greatly influenced by the coverage of the box body area of the junction box, and the area of the module needs to be reduced as much as possible to reduce the influence on the power generation performance of the module; in addition, while the area of the junction box is reduced as much as possible, the problem that the junction box needs to meet the requirement of the high-power generation assembly for excessive current needs to be considered.
For the electrical safety of the photovoltaic module, the creepage distance of the junction box is strictly limited in the product standard, as shown in fig. 1, in the current photovoltaic module, a module bus bar penetrates into the junction box 10 from the back of the module, and is welded and connected with a welding area 12 of a copper plate terminal in the junction box 10, the shortest distance (vertical distance) d from the edge of the welding area 12 (i.e. the edge of the bus bar) to the side edge of the junction box 10 is the creepage distance of the junction box, for the modules with different specifications, such as 1000V or 1500V, the lower limit value of the creepage distance d is generally different, and the creepage distance d is required to be larger as the voltage is higher. In current technical scheme, in order to solve creepage distance problem under the big electric environment, generally all set up some and cut off the structure in the terminal box, but this kind of mode can cause terminal box volume or area to increase, is unsuitable high-efficient dual glass assembly terminal box, especially the less split type terminal box of volume. Therefore, for the high-efficiency double-glass assembly which is applied more at present, on one hand, the area of the junction box is reduced as much as possible, and the effective power generation area of the assembly is increased; on the other hand, the safety requirement of the electrical performance of the assembly is required to be met.
Disclosure of Invention
In view of the application requirements of the existing high-efficiency photovoltaic module, the invention aims to provide a photovoltaic module busbar mounting system and a photovoltaic module busbar mounting method, which meet the requirements of reducing the volume of a junction box and electrical safety performance of the module.
In order to achieve the purpose of the invention, the photovoltaic module bus bar mounting system comprises a photovoltaic module and a bus bar led out from a back plate of the photovoltaic module, wherein an insulating heat-shrinkable sleeve is sleeved on the lower part of a leading-out part of the bus bar, one end of the insulating heat-shrinkable sleeve extends into the back plate of the photovoltaic module and is fused with an EVA (ethylene vinyl acetate) back plate of the photovoltaic module into a whole, and the end part of the bus bar extends out of the other end of the insulating heat-shrinkable sleeve by a set length; the insulating heat-shrinkable sleeve is tightly sleeved with the bus bar after being heated and penetrates through the slit of the junction box together, and the part of the bus bar extending out of the insulating heat-shrinkable sleeve is welded with the copper plate terminal welding area in the junction box.
Preferably, the length of the bus bar led out from the back plate of the photovoltaic module is 10-12mm, and the length of the insulating heat-shrinkable sleeve is 5-7 mm.
According to another purpose of the invention, the method for installing the bus bar of the photovoltaic module comprises the following steps:
battery pieces are connected in series by using a bus bar, and then a battery string array required by the assembly is laid;
sleeving an insulating heat-shrinkable sleeve on a leading-out end of the bus bar, wherein the end part of the bus bar extends out of the insulating heat-shrinkable sleeve by a set length;
bonding and fusing the cell piece, the glass, the EVA adhesive film and the TPT back plate together under the set temperature, pressure and vacuum conditions, wherein one end of the insulating heat-shrinkable sleeve extends into the photovoltaic module back plate and is fused with the EVA back plate of the photovoltaic module into a whole;
leading out the bus bar tightly combined with the insulating heat-shrinkable sleeve, and inserting the bus bar into the junction box through the slit of the junction box;
welding and connecting the part of the bus bar extending out of the insulating heat-shrinkable sleeve with a copper plate terminal welding area in the junction box; and the number of the first and second groups,
and (5) pouring glue and sealing the junction box.
Preferably, the length of the bus bar led out from the back plate of the photovoltaic module is 10-12mm, and the length of the insulating heat-shrinkable sleeve is 5-7 mm.
According to the photovoltaic module bus bar mounting system, the end, led out from the photovoltaic module, of the bus bar is sleeved with the insulating heat-shrinkable sleeve, one end of the insulating heat-shrinkable sleeve extends into the photovoltaic module backboard and is fused with the EVA backboard of the photovoltaic module into a whole, then the insulating heat-shrinkable sleeve and the EVA backboard penetrate through the slit of the junction box together, the end part of the bus bar is welded and fixed with the copper plate terminal welding area in the junction box body, the insulating length of the bus bar is prolonged by the insulating heat-shrinkable sleeve, the creepage distance of the junction box can be obviously increased under the condition that the structure of the junction box body is not changed, and the area and the volume of the junction box can be reduced under the condition that the; or the electrical safety requirement under the environment of larger voltage application can be met under the condition that the junction box is not changed.
Drawings
The foregoing and other objects, features, and advantages of the invention will be apparent from the following detailed description taken in conjunction with the accompanying drawings. Wherein:
fig. 1 is a schematic view illustrating a creepage distance of a conventional photovoltaic module junction box;
FIG. 2 is a schematic structural diagram of a photovoltaic module bus bar mounting system according to the present invention;
fig. 3 is an enlarged schematic view of an assembly structure of a bus bar and a heat shrinkage bush of the photovoltaic module bus bar mounting system according to the present invention;
FIG. 4 is a schematic view of a mounting structure of a bus bar and a junction box of the bus bar mounting system of the photovoltaic module of the present invention;
fig. 5 is a schematic diagram showing a creepage distance of the bus bar mounting system of the photovoltaic module according to the present invention.
The main element names and labels in the figures are as follows:
10-a junction box; 100-a photovoltaic module; 102-a bus bar; 103-a slit; 104-insulating heat shrink tubing;
106-bus bar welding area.
Detailed Description
The technical contents and advantages of the invention are described in detail below with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 and 2, the photovoltaic module bus bar mounting system of the invention includes a photovoltaic module 100, a bus bar 102 led out from a back plate of the photovoltaic module 100, wherein an insulating heat shrink sleeve 104 is sleeved on a lower portion of a leading-out portion of the bus bar 102, one end of the insulating heat shrink sleeve 104 extends into the back plate of the photovoltaic module and is fused with an EVA back plate 110 of the photovoltaic module to form an end insulating protection structure integrally, and an end of the bus bar 102 extends out of the other end of the insulating heat shrink sleeve 104 by a set length; referring to fig. 4, the insulating heat shrink 104 is heated and then tightly sleeved with the bus bar, and the bus bar passes through the slit 103 of the junction box 10, and the portion of the bus bar 102 extending out of the insulating heat shrink is welded to the copper plate terminal land 106 in the junction box 10.
In a preferred embodiment, the length of the bus bar 102 led out from the back plate of the photovoltaic module is 10-12mm, and the length of the insulating heat shrink 104 is 5-7 mm.
According to the photovoltaic module bus bar mounting system, the photovoltaic module bus bar mounting method comprises the following steps:
battery pieces are connected in series by using the bus bar 102, and then a battery string array required by the assembly is laid;
an insulating heat-shrinkable sleeve 104 is sleeved on the leading-out end of the converging belt 102, and the end of the converging belt 102 extends out of the insulating heat-shrinkable sleeve 104 by a set length;
bonding and fusing the cell, glass, an EVA (ethylene vinyl acetate) back plate and a TPT (thermoplastic vulcanizate) back plate together under the set conditions of temperature, pressure and vacuum, wherein one end of an insulating heat-shrinkable sleeve 104 extends into the photovoltaic module back plate and is fused with the EVA back plate 100 of the photovoltaic module into a whole;
leading out the bus bar 102 tightly combined with the insulating heat-shrinkable sleeve 104, and inserting the bus bar into the junction box through the slit 103 of the junction box 10;
welding and connecting the part of the bus bar 102 extending out of the insulating heat-shrinkable sleeve with a copper plate terminal welding area 106 in the junction box 10; and the number of the first and second groups,
and (5) pouring glue and sealing the junction box.
In a preferred embodiment, the length of the bus bar 102 led out from the back plate of the photovoltaic module is 10-12mm, and the length of the insulating heat shrink 104 is 5-7 mm.
Referring to fig. 5, in the bus bar installation system of the photovoltaic module of the invention, an insulating heat-shrinkable sleeve is sleeved at one end of the bus bar led out from the photovoltaic module, one end of the heat-shrinkable sleeve extends into the photovoltaic module backboard and is fused with the EVA backboard of the photovoltaic module to form an integral end insulating protection structure, the other end of the heat-shrinkable sleeve and the bus bar pass through a slit of the junction box together, the end of the bus bar is welded and fixed with a copper plate terminal welding area in the box body, because the insulating thermal shrinkage bush prolongs the insulating length of the bus bar and extends upwards from the back plate to the copper plate terminal in the box body, i.e., distance d 'in the drawing, the creepage distance of the junction box can be changed from the original d to (d + d'), i.e., the creepage distance of the junction box is obviously increased under the condition of not changing the box body structure of the junction box, and the area and the volume of the junction box can be reduced under the condition of meeting the creepage distance required by the existing voltage environment; or the electrical safety requirement under the environment of higher voltage application is met under the condition that the junction box is not changed, so that the existing junction box can be applied to a photovoltaic module with higher power generation efficiency, a new junction box does not need to be redesigned and produced, and the production cost is reduced.
The present invention is not limited to the embodiments described above, and those skilled in the art may make modifications or changes within the scope of the disclosure without departing from the spirit of the present invention, so that the scope of the present invention is defined by the appended claims.
Claims (4)
1. A photovoltaic module bus bar mounting system is characterized by comprising a photovoltaic module and a bus bar led out from a back plate of the photovoltaic module, wherein an insulating heat-shrinkable sleeve is sleeved on the lower part of a leading-out part of the bus bar, one end of the insulating heat-shrinkable sleeve extends into the back plate of the photovoltaic module and is fused with an EVA (ethylene vinyl acetate) back plate of the photovoltaic module into a whole, and the end part of the bus bar extends out of the other end of the insulating heat-shrinkable sleeve by a set length; the insulating heat-shrinkable sleeve is tightly sleeved with the bus bar after being heated and penetrates through the slit of the junction box together, and the part of the bus bar extending out of the insulating heat-shrinkable sleeve is welded with the copper plate terminal welding area in the junction box.
2. The bus bar mounting system for photovoltaic modules according to claim 1, wherein the length of the bus bar led out from the back plate of the photovoltaic module is 10-12mm, and the length of the insulating heat-shrinkable sleeve is 5-7 mm.
3. A photovoltaic module bus bar installation method is characterized by comprising the following steps:
battery pieces are connected in series by using a bus bar, and then a battery string array required by the assembly is laid;
sleeving an insulating heat-shrinkable sleeve on a leading-out end of the bus bar, wherein the end part of the bus bar extends out of the insulating heat-shrinkable sleeve by a set length;
bonding and fusing the cell piece, the glass, the EVA adhesive film and the TPT back plate together under the set temperature, pressure and vacuum conditions, wherein one end of the insulating heat-shrinkable sleeve extends into the photovoltaic module back plate and is fused with the EVA back plate of the photovoltaic module into a whole;
leading out the bus bar tightly combined with the insulating heat-shrinkable sleeve, and inserting the bus bar into the junction box through the slit of the junction box;
welding and connecting the part of the bus bar extending out of the insulating heat-shrinkable sleeve with a copper plate terminal welding area in the junction box; and the number of the first and second groups,
and (5) pouring glue and sealing the junction box.
4. The method for mounting the bus bar of the photovoltaic module as claimed in claim 3, wherein the length of the bus bar led out from the back plate of the photovoltaic module is 10-12mm, and the length of the insulating heat-shrinkable sleeve is 5-7 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911310787.0A CN110829976A (en) | 2019-12-18 | 2019-12-18 | Photovoltaic module bus bar mounting system and mounting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911310787.0A CN110829976A (en) | 2019-12-18 | 2019-12-18 | Photovoltaic module bus bar mounting system and mounting method |
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| Publication Number | Publication Date |
|---|---|
| CN110829976A true CN110829976A (en) | 2020-02-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911310787.0A Pending CN110829976A (en) | 2019-12-18 | 2019-12-18 | Photovoltaic module bus bar mounting system and mounting method |
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| Country | Link |
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| CN (1) | CN110829976A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114799525A (en) * | 2022-05-28 | 2022-07-29 | 苏州快可光伏电子股份有限公司 | Photovoltaic module bus bar and junction box rapid welding process and photovoltaic module |
-
2019
- 2019-12-18 CN CN201911310787.0A patent/CN110829976A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114799525A (en) * | 2022-05-28 | 2022-07-29 | 苏州快可光伏电子股份有限公司 | Photovoltaic module bus bar and junction box rapid welding process and photovoltaic module |
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