CN112436066A - Series packaging method for photovoltaic cells - Google Patents
Series packaging method for photovoltaic cells Download PDFInfo
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- CN112436066A CN112436066A CN202011433955.8A CN202011433955A CN112436066A CN 112436066 A CN112436066 A CN 112436066A CN 202011433955 A CN202011433955 A CN 202011433955A CN 112436066 A CN112436066 A CN 112436066A
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- cell
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- 238000004806 packaging method and process Methods 0.000 title claims abstract description 64
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000005538 encapsulation Methods 0.000 claims abstract description 36
- 238000004519 manufacturing process Methods 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 7
- 239000008393 encapsulating agent Substances 0.000 claims description 10
- 239000002313 adhesive film Substances 0.000 claims description 8
- 239000004020 conductor Substances 0.000 claims description 5
- 239000002131 composite material Substances 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract description 5
- 229910052709 silver Inorganic materials 0.000 abstract description 5
- 239000004332 silver Substances 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000005022 packaging material Substances 0.000 abstract description 2
- 238000012858 packaging process Methods 0.000 abstract description 2
- 238000010248 power generation Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000009517 secondary packaging Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 229920006280 packaging film Polymers 0.000 description 1
- 239000012785 packaging film Substances 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
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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
-
- 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
- H01L31/048—Encapsulation of modules
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Abstract
The invention discloses a series packaging method of photovoltaic cells, which specifically comprises the following steps: step 1: manufacturing a sub-battery packaging layer and a sub-battery conductive pattern to form a patterned sub-battery packaging layer; step 2: connecting the graphical sub-battery packaging layer with the sub-battery; and step 3: manufacturing a series conductive pattern and a series packaging layer to form a graphical series packaging layer; and 4, step 4: the subcell to which the patterned subcell encapsulation layer is connected to the patterned tandem encapsulation layer while connecting the patterned subcell encapsulation layer and the patterned tandem encapsulation layer through the tandem region. The invention has the beneficial effects that: by changing the traditional electrode lead-out material, the use of silver paste is reduced, and the cost of the photovoltaic module is greatly reduced; the bus bars connected in series are changed into conductive patterns and are compounded with the packaging material into a whole, so that the bus bars can be synchronously connected in series in the packaging process, and the process cost is reduced.
Description
Technical Field
The invention relates to a photovoltaic cell, in particular to a series packaging method of a photovoltaic cell.
Background
The main series connection methods of the photovoltaic cells on the market at present mainly comprise: firstly, grid lines are manufactured on the surface by using a silver paste silk-screen method, then bus bars are welded to lead out the positive electrode and the negative electrode and are connected in series, secondly, the positive electrode and the negative electrode are led out by using the silk-screen method and then all the sub-battery pieces are lapped together (CN 103840024), thirdly, a metal thin wire is wound into a fixed shape and then is lapped on the front side and the back side of the battery, and fourthly, the positive electrode and the negative electrode are led out and connected in series by using a front plate and a back plate (CN 110556443A). The method is a main mode of leading out and connecting photovoltaic module electrodes in series at present, but silver paste and a silk-screen process are used in the method, the cost is high, the process is complex, small gaps are inevitably formed between the cells due to the existence of the bus bars, and the effective power generation area is reduced. The method is characterized in that the battery piece has a certain thickness, so that the situation of short circuit of the battery caused by damaging the film layer is easy to occur during lapping, and the cost of silver paste is not favorable for reducing the cost; the method third, because the metal thin wire is a round wire, the contact area is limited in the lapping process, and the condition of component failure caused by poor contact is easy to occur; although the front plate and the back plate are used for improving the contact between the lead-out grid lines and the battery chip, gaps must exist between the sub-batteries, and the series connection region occupies a large area, so that the effective power generation area is reduced.
Disclosure of Invention
The present invention aims to solve the above problems and provide a method for series packaging photovoltaic cells.
A method of series packaging of photovoltaic cells, comprising the steps of:
step 1: manufacturing a sub-battery packaging layer and a sub-battery conductive pattern to form a patterned sub-battery packaging layer;
step 2: connecting the graphical sub-battery packaging layer with the sub-battery;
and step 3: manufacturing a series conductive pattern and a series packaging layer to form a graphical series packaging layer;
and 4, step 4: the subcell to which the patterned subcell encapsulation layer is connected to the patterned tandem encapsulation layer while connecting the patterned subcell encapsulation layer and the patterned tandem encapsulation layer through the tandem region.
Preferably, the sub-battery packaging layer and the series packaging layer are made of a composite material of a weather-resistant material and a photovoltaic adhesive film or are made of a single photovoltaic adhesive film.
Preferably, the contact area between the sub-battery conductive pattern and the sub-battery and the series conductive pattern is provided with a conductive grid line, and the conductive grid line is connected with the conductive grid line in the series area.
Preferably, the patterned sub-battery packaging layer and the patterned serial packaging layer are in direct contact with the sub-battery or are adhered or welded by conductive adhesives.
Preferably, the patterned sub-cell encapsulation layer in step 2 may completely cover the sub-cell or cover a part of the surface of the sub-cell, and the sub-cell conductive pattern has a contact part with the surface of the sub-cell and also has a series part of the unconnected sub-cells.
Preferably, the sub-battery connected with the series conductive pattern in step 4 is a sub-battery directly completing the connection between the patterned sub-battery packaging layer and the sub-battery, or a sub-battery cut after completing the connection between the patterned sub-battery packaging layer and the sub-battery.
Preferably, the series connection region is a place where the patterned sub-battery packaging layer and the patterned series packaging layer are in contact with each other, and the region enables the patterned sub-battery packaging layer and the patterned series packaging layer to be conducted to achieve series connection of the battery pieces.
Preferably, the sub-battery conductive pattern and the series conductive pattern are conductive materials.
The invention has the beneficial effects that: by changing the traditional electrode lead-out material, the use of silver paste is reduced, and the cost of the photovoltaic module is greatly reduced; by changing the series connection mode, the bus bars connected in series are changed into the conductive patterns and are compounded with the packaging material into a whole, so that the series connection can be synchronously realized in the packaging process, the technological process of firstly connecting in series and then packaging in the production process of the traditional assembly is changed, and the technological cost is reduced; if the reliability can not reach the standard, secondary packaging can still be carried out, and the reliability exceeding that of the original packaging method can be realized; in the connection process of the patterned sub-battery packaging layer and the sub-battery, the patterned sub-battery packaging layer can be connected firstly, and then the sub-battery is cut, so that the process flexibility is improved, and the cost is reduced; through the design, no gap can be realized between the sub-batteries, the waste of the area of the assembly due to the series connection area is avoided, the area of an effective power generation area is increased, the short circuit risk caused by the traditional lamination process is also avoided, and the product yield is improved.
Drawings
FIG. 1 is a flow chart of the operation of the present invention.
Fig. 2 is a side view of the package structure of the present invention.
Fig. 3 is a top view of the package structure of the present invention.
In the figure: 1-subcell encapsulation layer, 2-subcell conductive pattern, 3-subcell, 4-series conductive pattern, 5-series encapsulation layer.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1, a series packaging method of photovoltaic cells includes the following steps:
step 1: manufacturing a sub-battery packaging layer and a sub-battery conductive pattern to form a patterned sub-battery packaging layer;
step 2: connecting the graphical sub-battery packaging layer with the sub-battery;
and step 3: manufacturing a series conductive pattern and a series packaging layer to form a graphical series packaging layer;
and 4, step 4: the subcell to which the patterned subcell encapsulation layer is connected to the patterned tandem encapsulation layer while connecting the patterned subcell encapsulation layer and the patterned tandem encapsulation layer through the tandem region.
It should be noted that, in step 1, the sub-battery conductive pattern may be formed and then combined with the sub-battery packaging layer, or the sub-battery conductive pattern may be formed by combining a large-area conductive material with the sub-battery packaging layer and then processing the combination.
It should be noted that the sub-cell conductive pattern may be connected to the sub-cell encapsulant layer before connecting the sub-cells, or may be connected to the sub-cell encapsulant layer while connecting the sub-cells.
It should be noted that, the step 2 of patterning the sub-battery packaging layer may be connected to one sub-battery, or a sub-battery group composed of a plurality of sub-batteries.
It should be noted that, in the step 3, the series conductive pattern may be formed and then combined with the series encapsulation layer, or the large-area conductive material may be combined with the series encapsulation layer and then processed to form the series conductive pattern; the series conductive pattern may be connected to the series encapsulant layer prior to connection with the sub-cell to which the patterned sub-cell encapsulant layer is connected, or may be connected to the sub-cell encapsulant layer while connected to the sub-cell to which the patterned sub-cell encapsulant layer is connected, or may be connected to the sub-cell to which the patterned sub-cell encapsulant layer is connected prior to connection with the series encapsulant layer.
The connected sub-cells connected in the step 4 may be sub-cells (groups) directly connected to the patterned sub-cell packaging layer, or may be sub-cells (groups) cut after the patterned sub-cell packaging layer is connected to the sub-cells.
It should be noted that, in step 4, the series connection conductive pattern may be connected to the sub-cell or the sub-cell conductive pattern, and then the series connection encapsulation layer is connected.
It is to be understood that the subcell is any photovoltaic cell.
It is to be understood that the sub-cell encapsulation layer and the series encapsulation layer are made of a composite material of a weather-resistant material and a photovoltaic adhesive film, or made of a single photovoltaic adhesive film.
It is to be understood that the sub-cell conductive pattern and the series conductive pattern and sub-cell contact regions are provided with conductive grid lines which are connected to the series region conductive grid lines.
Besides the grid lines with the extraction electrodes, the sub-battery packaging layer is also provided with series contacts for connecting with the series contacts on the patterned series packaging layer, the contacts are beyond the range of the sub-batteries, and in the conductive areas, an insulating layer can be arranged according to requirements to prevent the short circuit of the batteries.
It is to be understood that the patterned sub-cell encapsulation layer and the patterned series encapsulation layer are in direct contact with the sub-cells or attached or soldered with a conductive glue.
It is to be understood that the patterned sub-cell encapsulation layer may completely cover the sub-cell or cover a portion of the surface of the sub-cell, and that the sub-cell conductive pattern presents a portion in contact with the surface of the sub-cell, as well as a portion in series that is not connected to the sub-cell.
It is to be understood that the subcell conductive pattern in the series region presents a portion in contact with the subcell surface, as well as a series portion of unconnected subcells.
It is to be understood that the series conductive pattern connects the subcells or sub-cell groups and simultaneously connects the series portions of the other subcell conductive patterns.
It should be noted that the size of the sub-battery packaging layer may be smaller than the sub-battery, or larger than the sub-battery, but it is necessary to completely cover the sub-battery conductive pattern; the tandem encapsulation layer is typically the entire photovoltaic module size, or the tandem cell size.
It should be understood that the series region is where the patterned sub-cell encapsulation layer contacts the conductive region of the patterned series encapsulation layer, and the region enables the patterned sub-cell encapsulation layer to be conducted with the patterned series encapsulation layer to realize the series connection of the cell pieces, and the series region may be located beside the sub-cell pieces, between the cell pieces, or within the cell piece region.
It is to be understood that the subcell conductive pattern and the series conductive pattern are conductive materials.
It should be noted that, after the assembly is completed, whether the secondary packaging is performed or not can be selected according to the requirement, and the front packaging layer: the film is divided into two parts, namely a weather-resistant material (similar to glass or PET and the like) and a photovoltaic adhesive film (similar to EVA, POE and the like), wherein the two parts can be combined into one and can also be mutually independent; back packaging layer: the packaging film is divided into two parts, namely a weather-resistant material (similar to glass or PET and the like) and a photovoltaic adhesive film (similar to EVA, POE and the like), wherein the two parts can be combined into one part or can be mutually independent, and the method for re-packaging can be laminating, cold pressing or hot rolling and the like.
Fig. 2 and 3 are side and top views of the package structure of the present invention.
It should be understood that the package structure includes, from top to bottom, a sub-cell package layer, a sub-cell conductive pattern, a sub-cell, a series conductive pattern, and a series package layer.
Claims (8)
1. A series packaging method of photovoltaic cells is characterized by comprising the following steps:
step 1: manufacturing a sub-battery packaging layer and a sub-battery conductive pattern to form a patterned sub-battery packaging layer;
step 2: connecting the graphical sub-battery packaging layer with the sub-battery;
and step 3: manufacturing a series conductive pattern and a series packaging layer to form a graphical series packaging layer;
and 4, step 4: the subcell to which the patterned subcell encapsulation layer is connected to the patterned tandem encapsulation layer while connecting the patterned subcell encapsulation layer and the patterned tandem encapsulation layer through the tandem region.
2. The series packaging method of photovoltaic cells according to claim 1, wherein the sub-cell packaging layer and the series packaging layer are made of a composite material of a weather-resistant material and a photovoltaic adhesive film or are made of a single photovoltaic adhesive film.
3. A method for series packaging of photovoltaic cells as claimed in claim 1 wherein said subcell conductive pattern and the series conductive pattern and subcell contact areas are provided with conductive grid lines connected to the series region conductive grid lines.
4. A method for series packaging of photovoltaic cells as claimed in claim 1 wherein the patterned sub-cell encapsulant layer and the patterned series encapsulant layer are in direct contact with the sub-cells or are attached or soldered with conductive glue.
5. A method for encapsulating photovoltaic cells in series as claimed in claim 1, wherein the patterned sub-cell encapsulation layer in step 2 can completely cover the sub-cell or cover a portion of the surface of the sub-cell, and the sub-cell conductive pattern has a contact portion with the surface of the sub-cell and a series portion of the unconnected sub-cell.
6. A series connection encapsulation method for photovoltaic cells according to claim 1, wherein the sub-cells connected with the series conductive patterns in step 4 are sub-cells directly completing the patterned sub-cell encapsulation layer and sub-cell connection, or sub-cells trimmed after completing the patterned sub-cell encapsulation layer and sub-cell connection.
7. A series packaging method for photovoltaic cells according to claim 1, wherein the series region is where the patterned sub-cell packaging layer contacts the conductive region of the patterned series packaging layer, and the region enables the patterned sub-cell packaging layer and the patterned series packaging layer to conduct to realize series connection of the cells.
8. A method for series packaging of photovoltaic cells as claimed in claim 1 wherein said sub-cell conductive pattern and series conductive pattern are conductive materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011433955.8A CN112436066A (en) | 2020-12-10 | 2020-12-10 | Series packaging method for photovoltaic cells |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011433955.8A CN112436066A (en) | 2020-12-10 | 2020-12-10 | Series packaging method for photovoltaic cells |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112436066A true CN112436066A (en) | 2021-03-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011433955.8A Pending CN112436066A (en) | 2020-12-10 | 2020-12-10 | Series packaging method for photovoltaic cells |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112436066A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103415990A (en) * | 2010-06-08 | 2013-11-27 | 美亚国际科技公司 | Solar cell interconnection, module, panel and method |
| JP2014154671A (en) * | 2013-02-07 | 2014-08-25 | Nitto Denko Corp | Inter connector |
| CN209515683U (en) * | 2019-05-09 | 2019-10-18 | 苏州城邦达力材料科技有限公司 | Crystalline Silicon PV Module |
-
2020
- 2020-12-10 CN CN202011433955.8A patent/CN112436066A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103415990A (en) * | 2010-06-08 | 2013-11-27 | 美亚国际科技公司 | Solar cell interconnection, module, panel and method |
| JP2014154671A (en) * | 2013-02-07 | 2014-08-25 | Nitto Denko Corp | Inter connector |
| CN209515683U (en) * | 2019-05-09 | 2019-10-18 | 苏州城邦达力材料科技有限公司 | Crystalline Silicon PV Module |
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Application publication date: 20210302 |
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| RJ01 | Rejection of invention patent application after publication |