CN217280809U - No main grid photovoltaic module with film - Google Patents
No main grid photovoltaic module with film Download PDFInfo
- Publication number
- CN217280809U CN217280809U CN202220984891.9U CN202220984891U CN217280809U CN 217280809 U CN217280809 U CN 217280809U CN 202220984891 U CN202220984891 U CN 202220984891U CN 217280809 U CN217280809 U CN 217280809U
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- film
- main grid
- welding
- welding strip
- strip
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- 238000003466 welding Methods 0.000 claims abstract description 72
- 229910000679 solder Inorganic materials 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims description 16
- 229910001316 Ag alloy Inorganic materials 0.000 claims description 3
- QKAJPFXKNNXMIZ-UHFFFAOYSA-N [Bi].[Ag].[Sn] Chemical compound [Bi].[Ag].[Sn] QKAJPFXKNNXMIZ-UHFFFAOYSA-N 0.000 claims description 3
- 238000002834 transmittance Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000009467 reduction Effects 0.000 abstract description 4
- 239000010408 film Substances 0.000 description 31
- 239000010410 layer Substances 0.000 description 12
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 9
- 239000005038 ethylene vinyl acetate Substances 0.000 description 8
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 6
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 238000010030 laminating Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 5
- 238000007731 hot pressing Methods 0.000 description 5
- 229910052709 silver Inorganic materials 0.000 description 5
- 239000004332 silver Substances 0.000 description 5
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 229910016331 Bi—Ag Inorganic materials 0.000 description 1
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 description 1
- 229910001128 Sn alloy Inorganic materials 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000002313 adhesive film Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- -1 polyethylene terephthalate Polymers 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 229910001174 tin-lead alloy Inorganic materials 0.000 description 1
- 230000009466 transformation Effects 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 relates to a no main grid photovoltaic module with film, it includes no main grid battery piece (1) of a plurality of array arrangements, the front and the back of no main grid battery piece (1) all are equipped with many solder strips (2), every solder strip (2) crisscross setting is at the front and the back of adjacent no main grid battery piece (1); the placing direction of the welding strip (2) is vertical to the direction of a fine grid without the main grid battery plate (1); the outer side of the welding strip (2) is provided with a layer of film (3), the film (3) covers the welding strip (2), and the welding strip (2) is fixed on the non-main grid battery piece (1) after being hot-pressed through the film (3). The utility model discloses a no main bars design on the battery piece will weld the area and fix and weld on the battery piece through the film, make to weld the area and directly form with thin bars and be connected, play the electric current and collect the effect, reduction in production cost promotes subassembly power, increases subassembly welding effect, promotes the subassembly reliability.
Description
Technical Field
The utility model relates to a photovoltaic cell technical field especially relates to a no main bars photovoltaic module with film.
Background
With the wide application of solar energy, the solar photovoltaic panel industry is also developed vigorously, and the efficiency improvement and cost reduction are the main research and development directions in the current industry; currently, in mainstream photovoltaic module technology, a main grid of a cell and a solder strip are welded through infrared high temperature, and at the same time, a positive electrode and a negative electrode of two adjacent cells are connected into a string, see fig. 1, and then the string is arranged in a certain order and then is connected with a circuit, and then is packaged by using a packaging material to prepare a module. However, this assembly structure causes the following problems:
(1) because the conventional welding usually adopts a welding strip and battery main grid silver paste to carry out high-temperature welding, certain requirements are imposed on the area of the main grid, so that the cost reduction of the silver paste has certain limitations, and the cost of a battery assembly is influenced;
(2) when a battery is designed, a certain number of main grids can be controlled due to cost consideration, the number of main grids in current mainstream design is 9-13, the distance between each main grid and each main grid is large, so that thin grids between the main grids are long, and the line loss during current collection is high, so that the power improvement of the component is influenced;
(3) the existing welding scheme usually uses a certain number of infrared lamp tubes to be arranged to form a high-temperature region for welding, but the high-temperature region usually shows that the temperature of the middle region is far higher than that of the peripheral region due to the arrangement problem of the lamp tubes, the welding effect is difficult to guarantee due to non-uniformity of the temperature, the phenomena of insufficient soldering, over-welding and the like are easy to occur, manual repair is needed, the manufacturing cost is increased, and the reliability of the assembly is influenced;
(4) influenced by the wire diameter of a welding strip and yield strength, a large stress exists between a battery piece and the battery piece in a traditional welding mode, and the assembly is prone to generating hidden cracks under weather conditions such as wind load, snow load and the like, so that the generated energy of the assembly is reduced and the reliability is reduced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the aforesaid not enough, provide a no main bars photovoltaic module with film, reduction in production cost promotes subassembly power and reliability.
The purpose of the utility model is realized like this:
a photovoltaic module without a main grid comprises a plurality of main grid-free battery pieces which are arranged in an array mode, wherein a plurality of welding strips are arranged on the front side and the back side of each main grid-free battery piece, and each welding strip is arranged on the front side and the back side of the adjacent main grid-free battery piece in a staggered mode; the placing direction of the welding strip is vertical to the direction of the fine grid without the main grid battery piece; and a layer of film is arranged on the outer side of the welding strip, the film covers the welding strip, and the welding strip is fixed on the non-main grid battery piece after being hot-pressed by the film.
Further, the thin film is integrally laid on the main grid-free battery plate and the welding strip.
Furthermore, the film is of a strip-shaped structure, and one film is laid on each welding strip, so that the film covers the welding strips.
Further, the width of the film is 0.5-4 mm.
Further, the solder strip is a low temperature solder strip.
Furthermore, the solder strip is made of Sn-Bi-Ag alloy.
Further, the film is made of pure PO materials or EVA materials.
Furthermore, the film comprises an upper layer and a lower layer, wherein the upper layer is made of a material with light transmittance reaching over 75%, and the lower layer is made of a PO (polyethylene oxide) material or an EVA (ethylene vinyl acetate) material.
Drawings
Fig. 1 is a schematic structural diagram of a conventional photovoltaic module.
Fig. 2 is a plan view of embodiment 1 of the present invention.
Fig. 3 is a plan view of embodiment 2 of the present invention.
Fig. 4 is a schematic structural diagram of embodiment 3 of the present invention.
Fig. 5 is a side view of embodiment 3 of the present invention.
Fig. 6 is a top view of step one of embodiment 3 of the present invention.
Fig. 7 is a side view of step one of embodiment 3 of the present invention.
Fig. 8 is a plan view of step two according to embodiment 3 of the present invention.
Fig. 9 is a side view of step two of embodiment 3 of the present invention.
Fig. 10 is a schematic welding diagram of step three in embodiment 3 of the present invention.
Fig. 11 is a schematic view of welding cluster in step four of embodiment 3 of the present invention.
Fig. 12 is a layout diagram of step five according to embodiment 3 of the present invention.
Fig. 13 is a schematic back view of a battery module according to step five of embodiment 3 of the present invention.
Fig. 14 is an electrical diagram of a battery pack according to embodiment 3 of the present invention.
Wherein:
the device comprises a non-main-grid battery piece 1, a welding strip 2, a thin film 3 and a hot-pressing tool 4.
Detailed Description
For better understanding of the technical solution of the present invention, the following detailed description will be made with reference to the accompanying drawings. It should be understood that the following embodiments are not intended to limit the embodiments of the present invention, but only the embodiments of the present invention. It should be noted that the description of the positional relationship of the components, such as the component a is located above the component B, is based on the description of the relative positions of the components in the drawings, and is not intended to limit the actual positional relationship of the components.
Example 1:
referring to fig. 2, fig. 2 depicts a top view of a photovoltaic module without a primary grid of example 1. As shown in the figures, the photovoltaic module without a main grid according to the embodiment 1 includes a main grid-free battery plate 1, wherein a plurality of solder strips 2 are disposed on both the front side and the back side of the main grid-free battery plate 1, and the placement direction of the solder strips 2 is perpendicular to the fine grid direction of the main grid-free battery plate 1; and a layer of film 3 is arranged on the outer side of the welding strip 2, and the film 3 is laid on the non-main grid battery plate 1 and the welding strip 2 in a whole piece manner.
The welding strip 2 is a low-temperature welding strip and is made of tin-bismuth-silver alloy.
The film 3 is made of pure PO material (propylene oxide) or EVA material (ethylene-vinyl acetate copolymer and rubber plastic foaming material made of the ethylene-vinyl acetate copolymer), the film 3 is integrally laid on the welding strip 2 and the non-main grid battery piece 1, and the film 3 can generate cross-linking reaction after being heated and has certain adhesive property to fix the welding strip 2 on the non-main grid battery piece 1.
Example 2:
referring to fig. 3, fig. 3 depicts a top view of a photovoltaic module without a main grid of example 2. As shown in the figure, the difference between the embodiment 2 and the embodiment 1 is that the film 3 is a strip structure, one film 3 is laid on each solder strip 2, so that the film 3 covers the solder strip 2, and the width of the film 3 is 0.5-4 mm.
Example 3:
referring to fig. 4 to 5, fig. 4 is a schematic structural diagram of a photovoltaic module without a main grid according to embodiment 3. As shown in the figure, the difference between this embodiment 3 and this embodiment 2 is that the film 3 includes an upper layer and a lower layer, the upper layer is made of PET (polyethylene terephthalate) or other material with better light transmittance, the lower layer is made of PO or EVA material, the upper layer mainly serves to isolate the PO or EVA film of the inner layer from the adhesive film used for packaging the module, and the solder strip 2 is better fixed on the cell sheet 1 without main gate.
Referring to fig. 6 to 10, the utility model relates to a welding strip welding method for photovoltaic module without main grid, which comprises the following steps:
placing a welding strip 2 on the non-main-grid battery plate 1 in a direction vertical to the fine grid of the non-main-grid battery plate 1 for preliminary positioning, wherein one end of the welding strip 2 falls above the battery plate, and the other end falls below the adjacent battery plate; laying a film 3 on the welding strip 2, wherein the film 3 covers the welding strip 2; and heating and pressurizing the film 3 by using a hot pressing process, so that the welding strip 2 is fixed on the non-main grid battery piece 1 for welding.
Referring to fig. 6 to 14, the present invention relates to a method for manufacturing a photovoltaic module without a main grid, comprising the following steps:
step one, placing a welding strip 2,
placing a welding strip 2 on a battery plate 1 without a main grid in a direction perpendicular to the thin grid of the battery plate for preliminary positioning, wherein one end of the welding strip falls above the battery plate, the other end of the welding strip falls below an adjacent battery plate, and connecting the positive electrode and the negative electrode of the adjacent two battery plates to achieve a circuit connection effect;
step two, laying a film,
the film of the above example 3 was laid on the solder strip 2 so that the film 3 covered the solder strip 2;
step three, hot-press welding is carried out,
the film 3 is heated and pressurized by adopting a hot pressing tool 4 through a hot pressing process, so that the welding strip 2 is fixed on the non-main-grid battery piece 1 for welding, the film 3 on the surface layer of the welding strip 2 is melted and the fine grid of the non-main-grid battery piece 1 forms good alloy contact through a laminating process at a laminating temperature and for a long laminating time, the hot pressing tool 4 adopts a laminating machine, the temperature uniformity in the laminating machine generally reaches +/-1 ℃, and the consistency of the welding temperature is ensured;
step four, welding the materials into a string,
repeating the steps to weld the main-grid-free battery pieces 1 fixed by the welding strip 2 into a battery string;
step five, typesetting and laminating,
typesetting the battery strings according to a laminated drawing, adopting a serial-parallel structure, and connecting the left and right strings in parallel after respectively connecting the left and right strings in series;
step six, a component packaging procedure is carried out,
the assembly is packaged and laminated, and the solder strip 2 and the fine grid of the non-main grid cell chip 1 form good contact through high temperature and vacuum pumping in the lamination;
step seven, connecting a junction box,
and a hole is formed in the back plate on the back surface of the component, and a junction box is arranged at the position of the hole for connection.
The cell piece adopts no main grid design, so that the silver paste can be saved by 30%, and the data is shown in the following table:
the working principle is as follows:
the low-temperature welding strip is adopted in the welding strip, the traditional welding strip is generally made of tin-lead alloy, the melting point is about 180 ℃, the melting point of the coating is reduced by changing the tin alloy components on the surface layer of the welding strip, if the melting point of the tin-bismuth-silver alloy is reduced to about 130 ℃, and the battery piece can be saved by more than 30% by adopting the non-main-grid design silver paste.
Due to the design without the main grid, the number of the welding strips can be increased to 12-30, the transmission distance of the fine grid is reduced, the current collection capacity is enhanced, the power effect of the assembly is improved, meanwhile, due to the fact that the number of the welding strips is increased, the current collection capacity is improved, the number of the auxiliary grids can be reduced in the design of the battery, the silver paste amount is further reduced, the welding strips with thinner wire diameters can be selected, the hidden crack risk caused by the stress of the welding strips between the sheets is reduced, the wire diameter of the welding strips in the traditional mode is 0.25-0.35mm, and the wire diameter of the welding strips can be 0.15-0.3mm due to the design without the main grid.
The above is only a specific application example of the present invention, and does not constitute any limitation to the protection scope of the present invention. All the technical solutions formed by equivalent transformation or equivalent replacement fall within the protection scope of the present invention.
Claims (8)
1. A photovoltaic module without a main grid is characterized in that: the front and back surfaces of the non-main grid battery pieces (1) are provided with a plurality of welding strips (2), and each welding strip (2) is arranged on the front and back surfaces of the adjacent non-main grid battery pieces (1) in a staggered manner; the placing direction of the welding strip (2) is vertical to the direction of a fine grid without the main grid battery plate (1); the outer side of the welding strip (2) is provided with a layer of film (3), the film (3) covers the welding strip (2), and the welding strip (2) is fixed on the non-main grid battery piece (1) after being hot-pressed through the film (3).
2. The photovoltaic module of claim 1, wherein: the film (3) is laid on the non-main grid battery plate (1) and the welding strip (2) in a whole piece mode.
3. A photovoltaic module without a main grid according to claim 1, wherein: the film (3) is of a strip-shaped structure, and one film (3) is laid on each welding strip (2) so that the film (3) covers the welding strips (2).
4. A photovoltaic module without a main grid according to claim 2, wherein: the width of the film (3) is 0.5-4 mm.
5. The photovoltaic module of claim 1, wherein: the welding strip (2) is a low-temperature welding strip.
6. The photovoltaic module of claim 5, wherein: the solder strip (2) is made of tin-bismuth-silver alloy.
7. A photovoltaic module without a main grid according to claim 1, wherein: the film (3) is made of pure PO material or EVA material.
8. A photovoltaic module without a main grid according to claim 1, wherein: the film (3) comprises an upper layer and a lower layer, wherein the upper layer is made of a material with light transmittance reaching over 75%, and the lower layer is made of a PO material or an EVA material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220984891.9U CN217280809U (en) | 2022-04-27 | 2022-04-27 | No main grid photovoltaic module with film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220984891.9U CN217280809U (en) | 2022-04-27 | 2022-04-27 | No main grid photovoltaic module with film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217280809U true CN217280809U (en) | 2022-08-23 |
Family
ID=82879066
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220984891.9U Active CN217280809U (en) | 2022-04-27 | 2022-04-27 | No main grid photovoltaic module with film |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217280809U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114864721A (en) * | 2022-04-27 | 2022-08-05 | 浙江爱康光电科技有限公司 | Main-grid-free photovoltaic module, preparation method thereof and welding strip welding method |
| CN115295655A (en) * | 2022-10-08 | 2022-11-04 | 浙江制能科技有限公司 | IBC battery pack and manufacturing method thereof |
-
2022
- 2022-04-27 CN CN202220984891.9U patent/CN217280809U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114864721A (en) * | 2022-04-27 | 2022-08-05 | 浙江爱康光电科技有限公司 | Main-grid-free photovoltaic module, preparation method thereof and welding strip welding method |
| CN115295655A (en) * | 2022-10-08 | 2022-11-04 | 浙江制能科技有限公司 | IBC battery pack and manufacturing method thereof |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
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Address after: 313100 zheneng Smart Energy Technology Industrial Park, Meishan Town, Changxing County, Huzhou City, Zhejiang Province Patentee after: Zhejiang Aikang Photoelectric Technology Co.,Ltd. Patentee after: Huzhou Aikang Photoelectric Technology Co.,Ltd. Patentee after: Zhejiang Aikang New Energy Technology Co.,Ltd. Address before: 313100 zheneng Smart Energy Technology Industrial Park, Meishan Town, Changxing County, Huzhou City, Zhejiang Province Patentee before: Zhejiang Aikang Photoelectric Technology Co.,Ltd. Patentee before: Huzhou Aikang Photoelectric Technology Co.,Ltd. Patentee before: JIANGYIN AKCOME SCIENCE AND TECHNOLOGY Co.,Ltd. |
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Effective date of registration: 20240624 Granted publication date: 20220823 |