CN211125669U - High-reliability crystalline silicon solar cell packaging assembly - Google Patents
High-reliability crystalline silicon solar cell packaging assembly Download PDFInfo
- Publication number
- CN211125669U CN211125669U CN201921940495.0U CN201921940495U CN211125669U CN 211125669 U CN211125669 U CN 211125669U CN 201921940495 U CN201921940495 U CN 201921940495U CN 211125669 U CN211125669 U CN 211125669U
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- CN
- China
- Prior art keywords
- copper foil
- battery piece
- glued membrane
- solar cell
- eva
- Prior art date
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- 229910021419 crystalline silicon Inorganic materials 0.000 title claims abstract description 12
- 238000004806 packaging method and process Methods 0.000 title claims description 4
- 239000011889 copper foil Substances 0.000 claims abstract description 56
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 55
- 238000003466 welding Methods 0.000 claims abstract description 39
- 239000011521 glass Substances 0.000 claims abstract description 23
- 239000012528 membrane Substances 0.000 claims abstract description 21
- 238000005538 encapsulation Methods 0.000 claims abstract description 4
- 239000000853 adhesive Substances 0.000 claims description 12
- 230000001070 adhesive effect Effects 0.000 claims description 12
- 229910000679 solder Inorganic materials 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 238000003475 lamination Methods 0.000 claims description 5
- 238000009432 framing Methods 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 3
- 238000005476 soldering Methods 0.000 claims 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 29
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 29
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 28
- 239000002313 adhesive film Substances 0.000 description 18
- 239000005357 flat glass Substances 0.000 description 5
- 230000008646 thermal stress Effects 0.000 description 5
- 238000010030 laminating Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
Images
Classifications
-
- 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 utility model discloses a high reliability crystalline silicon solar cell encapsulation subassembly, including backplate glass, EVA glued membrane, a plurality of battery piece and front glass, lay the EVA glued membrane on the backplate glass, lay the battery piece on the EVA glued membrane, laid EVA glued membrane and front glass on the battery piece in proper order, with the EVA glued membrane upper berth that backplate glass hugs closely is equipped with a plurality of copper foils, the coincidence of copper foil and battery piece back, all battery pieces are through welding the area series connection. The utility model discloses place the copper foil between battery piece back and EVA glued membrane, can help battery pack to dispel the heat better.
Description
Technical Field
The utility model belongs to the technical field of crystalline silicon solar module production technology, concretely relates to high reliability crystalline silicon solar module subassembly.
Background
With the development of photovoltaic module technology, the power of the photovoltaic module is continuously improved, and the interconnection mode of the module is also greatly changed. The reliability requirements of users for solar cells are also increasing. At present, a plurality of cells are connected in series in a crystalline silicon photovoltaic module in the industry through a welding strip, the width of the welding strip is generally 0-2mm wider than that of a main grid, and the length of the welding strip is about twice of that of the cells. The drawing force between the welding strip and the main grid of the battery is influenced by multiple factors such as slurry components, welding process, welding strip structure and the like. During the operation of the assembly, the solder strip can generate heat seriously due to the fact that the solder strip transmits large current, and the temperature of the contact area of the battery and the solder strip is obviously higher than that of other areas of the battery. The subassembly is at the outdoor running in-process, because the subassembly is worked daytime, stops evening, consequently the contact between welding strip and the battery can take place to pull out the power and descend because often receive long-time cold and hot circulation, influences the power output of subassembly, and serious meeting leads to the subassembly to become invalid in advance.
The disadvantages existing in the prior art battery interconnection process are as follows: (1) the welding strip is locally contacted with the battery, and thermal stress caused by welding and thermal stress generated by current in the operation of the assembly are too concentrated, so that the early failure of a welding area is easily caused; (2) after high-temperature welding, welding residual thermal stress is unevenly distributed, so that the welding hidden crack risk of the sliced battery is higher, or the reliability of the assembly is reduced. (3) The high-temperature welding causes severe warping of the battery piece, the fragment rate is high, and the hidden crack risk is high.
Disclosure of Invention
The purpose of the invention is as follows: the utility model aims to provide a high reliability crystalline silicon solar cell encapsulation subassembly to prior art not enough.
The technical scheme is as follows: a high reliability crystalline silicon solar cell encapsulation subassembly, including backplate glass, EVA glued membrane, a plurality of battery piece and front glass, lay the EVA glued membrane on the backplate glass, lay the battery piece on the EVA glued membrane, laid EVA glued membrane and front glass on the battery piece in proper order, with the EVA glued membrane upper berth that backplate glass hugs closely is equipped with a plurality of copper foils, the coincidence of copper foil and battery piece back, all battery pieces are through welding the area series connection.
The utility model discloses further preferred technical scheme does, and adjacent battery piece is established ties through welding the area, weld the one end in area and be connected with the battery piece on being located preceding battery piece back electrode, the other end is located and is connected with the battery piece on the positive electrode of back battery piece.
Preferably, the welding strips are respectively connected with the front electrode and the copper foil of the battery piece through a welding process or through conductive adhesive.
Preferably, the EVA adhesive film with the copper foil comprises a thick EVA adhesive film layer and a thin EVA adhesive film layer, the thin EVA adhesive film layer is positioned on the upper layer, the joint of the thin EVA adhesive film layer and the copper foil is hollow, the upper surface of the copper foil and the thin EVA adhesive film layer are positioned on the same plane, and the copper foil is completely attached to the battery piece.
Preferably, the copper foil and the battery piece are bonded through conductive adhesive to realize electrical connection.
Preferably, the size of the copper foil is consistent with that of the battery, the number of the copper foils is equal to that of the battery pieces packaged by the assembly, and the copper foil is a solid copper foil or a carved and hollowed-out copper foil.
Preferably, after the front glass is installed, the assembly is placed into a laminating machine for lamination, and then framing and installing the junction box are carried out after lamination.
The beneficial effects (1) the utility model discloses place the copper foil between crystalline silicon battery piece back and EVA glued membrane, the benefit of placing the copper foil is ①, thin copper foil can effectively help the better heat dissipation of battery piece, reduce the thermal resistance, guarantee battery piece conversion efficiency, prevent that thermal stress concentration from causing local damage, ②, the copper foil is compared and is welded the area and have better current transmission ability, can reduce battery pack internal consumption, increase power output, ③, be connected welding area and copper foil welding or conducting resin, can avoid battery piece back electrode and the direct high temperature welding of welding area, reduce battery piece welding thermal stress and because of hidden fracture and the piece risk that high temperature welding caused, ④, increase battery piece mechanical properties, promote battery pack mechanical properties and reliability.
Drawings
Fig. 1 is a schematic diagram of a battery package assembly according to the present invention;
FIG. 2 is a schematic view of the connection between the battery piece and the copper foil according to the present invention;
fig. 3 is a schematic view of the battery plate and the copper foil set in series connection according to the present invention;
FIG. 4 is a top view of the EVA adhesive film with copper foil according to the present invention;
fig. 5 is a side view of the EVA adhesive film with copper foil of the present invention.
In the figure, 1-EVA adhesive film, 2-copper foil, 3-backboard glass, 4-front glass, 5-conductive adhesive, 6-battery piece, 7-battery piece front electrode and 8-welding strip.
Detailed Description
The technical solution of the present invention is described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the embodiments.
Example (b): a high-reliability crystalline silicon solar cell packaging assembly comprises back plate glass 3, EVA (ethylene vinyl acetate) adhesive films 1, a plurality of cell sheets 6 and front glass 4, wherein 60 cell sheets 6 are 60, the cell sheets are crystalline silicon cell sheets, the 60 cell sheets 6 are uniformly arranged in a matrix, the EVA adhesive film 1 is laid on the back plate glass 3, the cell sheets 6 are laid on the EVA adhesive film 1, the EVA adhesive films 1 and the front glass 4 are sequentially laid on the cell sheets 6, 60 copper foils 2 are laid on the EVA adhesive film 1 tightly attached to the back plate glass 3, the sizes of the copper foils 2 are consistent with the sizes of cells, the laying positions of the copper foils correspond to the positions of the cell sheets 6 packaged by the assembly, the copper foils 2 are solid copper foils or carved and hollowed copper foils, the copper foils 2 are overlapped with the back surfaces of the cell sheets 6, and all the cell sheets 6 are connected in series through solder strips 8; the adjacent battery pieces 6 are connected in series through welding strips 8, one end of each welding strip 8 is positioned on the back electrode of the previous battery piece and connected with the battery piece 6, and the other end of each welding strip 8 is positioned on the front electrode 7 of the next battery piece and connected with the battery piece 6; the welding strip 8 is respectively connected with the battery piece front electrode 7 and the copper foil 2 through a welding process or connected through the conductive adhesive 5.
The utility model discloses further preferred technical scheme does, EVA glued membrane 1 with copper foil 2 includes a thick, a thin two-layer EVA glued membrane 1, and thin EVA membrane is located the upper strata, and it is fretwork with copper foil 2 junction, the upper surface of copper foil 2 and thin EVA membrane are located the coplanar, copper foil 2 and battery piece 6 laminate completely; the copper foil 2 is bonded with the battery piece 6 through the conductive adhesive 5, so that electrical connection is realized; after the front glass 4 is installed, the assembly is placed into a laminating machine for lamination, and after lamination, framing and installation of a junction box are carried out.
The utility model discloses specific installation procedure does:
(1) laying back plate glass;
(2) paving an EVA adhesive film with a copper foil on the back plate glass paved in the step (1);
(3) coating conductive adhesive on the copper foil in the EVA adhesive film laid in the step (2), wherein the position of the conductive adhesive is determined according to the position of an electrode of the battery piece, the battery piece and the copper foil are connected electrically by adopting the conductive adhesive, a welding strip is placed on the copper foil, and the position where the welding strip is placed is kept to be intersected with the position of the electrode of the battery piece and is positioned on the same straight line; the welding strip and the copper foil can be connected through a welding process or through conductive adhesive;
(4) laying battery pieces on the product obtained in the step (3), wherein the back surfaces of the battery pieces are overlapped with the copper foil;
(5) connecting the front electrode of the product battery piece obtained in the step (4) with the back electrode of the adjacent battery piece through a welding strip, wherein the welding strip can be connected with the front electrode of the battery piece and the back electrode of the battery piece through welding or conductive adhesive;
(6) paving an EVA adhesive film on the front surface of the product obtained in the step (5);
(7) paving front glass on the EVA adhesive film of the product obtained in the step (6);
(8) then carrying out appearance inspection on the product obtained in the step (7);
(9) putting the qualified product obtained in the step (8) into a laminating machine for laminating;
(10) and (5) framing and installing a junction box on the product obtained in the step (9).
As mentioned above, although the present invention has been shown and described with reference to certain preferred embodiments, it should not be construed as limiting the invention itself. Various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. The utility model provides a high reliability crystalline silicon solar cell encapsulation subassembly, includes backplate glass, EVA glued membrane, a plurality of battery piece and front glass, lay the EVA glued membrane on the backplate glass, lay the battery piece on the EVA glued membrane, lay EVA glued membrane and front glass on the battery piece in proper order, its characterized in that, with the EVA glued membrane upper berth that backplate glass hugs closely is equipped with a plurality of copper foils, the copper foil coincides with the battery piece dorsal surface, and all battery pieces are through welding the area series connection.
2. The solar cell package assembly of claim 1, wherein adjacent cells are connected in series by solder strips, one end of each solder strip is connected to a cell on the back electrode of a previous cell and the other end of each solder strip is connected to a cell on the front electrode of a next cell.
3. The solar cell package assembly of claim 2, wherein the solder strips are connected to the front electrodes and the copper foil of the cell respectively by a soldering process or by a conductive adhesive.
4. The solar cell packaging assembly according to claim 1, wherein the EVA film with copper foil comprises a thick EVA film and a thin EVA film, the thin EVA film is located on the upper layer, the joint of the thin EVA film and the copper foil is hollow, the upper surface of the copper foil and the thin EVA film are located on the same plane, and the copper foil is completely attached to the cell.
5. The solar cell package assembly of claim 1, wherein the copper foil and the cell sheet are bonded together by a conductive adhesive to realize electrical connection.
6. The solar cell package assembly of claim 1, wherein the copper foil is one of a solid copper foil and an engraved copper foil, and has a size corresponding to that of the cell and the number of the cells is equal to that of the cells packaged by the assembly.
7. The solar cell package assembly of claim 1, wherein the front glass is mounted and then the assembly is placed in a laminator for lamination, and then framing and mounting the junction box are performed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921940495.0U CN211125669U (en) | 2019-11-12 | 2019-11-12 | High-reliability crystalline silicon solar cell packaging assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921940495.0U CN211125669U (en) | 2019-11-12 | 2019-11-12 | High-reliability crystalline silicon solar cell packaging assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211125669U true CN211125669U (en) | 2020-07-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921940495.0U Active CN211125669U (en) | 2019-11-12 | 2019-11-12 | High-reliability crystalline silicon solar cell packaging assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211125669U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113725317A (en) * | 2021-07-22 | 2021-11-30 | 湖北美格新能源科技有限公司 | Preparation method of solar module |
| CN114284369A (en) * | 2021-12-29 | 2022-04-05 | 明冠新材料股份有限公司 | Hollowed-out copper foil and preparation method thereof |
-
2019
- 2019-11-12 CN CN201921940495.0U patent/CN211125669U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113725317A (en) * | 2021-07-22 | 2021-11-30 | 湖北美格新能源科技有限公司 | Preparation method of solar module |
| CN114284369A (en) * | 2021-12-29 | 2022-04-05 | 明冠新材料股份有限公司 | Hollowed-out copper foil and preparation method thereof |
| CN114284369B (en) * | 2021-12-29 | 2023-09-01 | 明冠新材料股份有限公司 | Hollowed-out copper foil and preparation method thereof |
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