CN222509902U - Photovoltaic cell without main grid and photovoltaic module - Google Patents
Photovoltaic cell without main grid and photovoltaic module Download PDFInfo
- Publication number
- CN222509902U CN222509902U CN202420217155.XU CN202420217155U CN222509902U CN 222509902 U CN222509902 U CN 222509902U CN 202420217155 U CN202420217155 U CN 202420217155U CN 222509902 U CN222509902 U CN 222509902U
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- China
- Prior art keywords
- solar cell
- photovoltaic
- welding
- main
- thin grid
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- 238000003466 welding Methods 0.000 claims abstract description 67
- 210000004027 cell Anatomy 0.000 claims abstract description 52
- 210000005056 cell body Anatomy 0.000 claims abstract description 11
- 229910000679 solder Inorganic materials 0.000 claims description 11
- 229920006280 packaging film Polymers 0.000 claims description 8
- 239000012785 packaging film Substances 0.000 claims description 8
- 229910045601 alloy Inorganic materials 0.000 claims description 7
- 239000000956 alloy Substances 0.000 claims description 7
- 239000000758 substrate Substances 0.000 claims description 7
- 238000005476 soldering Methods 0.000 claims 1
- 238000003475 lamination Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 229910052709 silver Inorganic materials 0.000 description 3
- 239000004332 silver Substances 0.000 description 3
- 238000005336 cracking Methods 0.000 description 2
- 229910021419 crystalline silicon Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910001152 Bi alloy Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
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
本实用新型涉及光伏产品技术领域，特别涉及一种无主栅光伏电池及光伏组件，包括太阳能电池片主体、设置于所述太阳能电池片主体上的若干细栅线、设置于所述太阳能电池片主体上与所述细栅线交连的若干焊带，所述太阳能电池片主体与所述焊带之间设置有用于固定所述细栅线的固定结构，所述固定结构包括均匀开设于所述太阳能电池片主体上以用于容纳所述焊带的若干第一安装槽，所述焊带上均匀开设有若干用于卡接所述细栅线的第二安装槽，所述第一安装槽的深度与所述第二安装槽的深度之和大于所述焊带的直径。
The utility model relates to the technical field of photovoltaic products, and in particular to a main-grid-free photovoltaic cell and photovoltaic module, comprising a solar cell body, a plurality of fine grid lines arranged on the solar cell body, and a plurality of welding strips arranged on the solar cell body and interlaced with the fine grid lines, a fixing structure for fixing the fine grid lines is arranged between the solar cell body and the welding strips, the fixing structure comprises a plurality of first mounting grooves uniformly opened on the solar cell body for accommodating the welding strips, a plurality of second mounting grooves uniformly opened on the welding strips for clamping the fine grid lines, and the sum of the depth of the first mounting grooves and the depth of the second mounting grooves is greater than the diameter of the welding strips.
Description
Technical Field
The utility model relates to the technical field of photovoltaic products, in particular to a photovoltaic cell without a main grid and a photovoltaic module.
Background
The power generation matrix of the crystalline silicon solar cell main body (the crystalline silicon cell for short) is a silicon wafer, a plurality of thin grid lines are printed on a conventional cell for collecting current generated by the silicon wafer after the silicon wafer is irradiated, and 5-20 main grid lines are printed on the conventional cell for collecting the current on the thin grid lines. However, the main grid line needs enough line width to realize good welding with the welding strip by using a chemical welding mode, so that a large amount of silver paste is consumed for printing the main grid line, the cost input of the battery piece is greatly improved, moreover, in the chemical welding process, the welding strip is always required to be welded with the welding point on the main grid line in a molten state to ensure the welding effect, hidden cracks and fragments are easily caused in the welding process, the generated energy of the battery piece is reduced, and the product qualification rate of the battery piece is reduced. Therefore, the technology of the battery piece without the main grid line is generated in order to reduce the use amount of silver paste under the promotion of the aim of the battery piece with low cost and high power generation.
The battery piece without the main grid generally removes the main grid and retains the thin grid on the basis of the conventional battery piece, so that the battery piece can greatly reduce the use amount of expensive silver paste on one hand and can increase the effective illumination area of the battery piece because the main grid does not shade sunlight on the surface of the battery piece on the other hand. In actual operation, if only the metal connection between the round welding wire (or copper wire) and the fine grid is relied on, the connection reliability of the fine grid and the welding wire cannot be met, reliability risks such as poor welding are easily caused, and then poor current collection effect is caused. Moreover, after welding, the round welding wires are exposed on the outer surface of the battery piece, so that the height of the welding wire connection points of the battery piece is increased, and stress concentration points are easily formed at the welding wire connection points in the subsequent lamination process of the photovoltaic module, so that the risk of hidden cracking of the battery piece is greatly increased.
Disclosure of utility model
The utility model aims to provide a photovoltaic cell without a main grid and a photovoltaic module.
The utility model is realized by the following technical scheme:
The utility model provides a no main bars photovoltaic cell, includes solar wafer main part, set up in a plurality of thin bars line in the solar wafer main part, set up in a plurality of welding strips of solar wafer main part with thin bars line cross connection, solar wafer main part with be provided with between the welding strip and be used for fixing the fixed knot of thin bars line constructs, fixed knot constructs including evenly set up in on the solar wafer main part in order to be used for holding a plurality of first mounting groove of welding strip, evenly set up a plurality of being used for the joint on the welding strip the second mounting groove of thin bars line, the degree of depth of first mounting groove with the degree of depth sum of second mounting groove is greater than the diameter of welding strip.
As a further improvement of the utility model, the fine grid lines extend along a first direction and are uniformly distributed along a second direction, the welding strips extend along the second direction and are uniformly distributed along the first direction, and the first direction and the second direction are mutually perpendicular.
As a further improvement of the utility model, the first mounting groove is a wire groove which is arranged on the solar cell main body and extends along the second direction to be matched with the welding strip.
As a further improvement of the utility model, the welding strip comprises a conductive substrate and a low-temperature alloy layer coated on the surface of the conductive substrate.
As a further improvement of the present utility model, a first welding portion is provided between the solder strip and the solar cell main body.
As a further improvement of the utility model, a second welding part is arranged between the solar cell main body and the thin grid line.
Based on the same conception, the utility model also provides a photovoltaic module, which comprises a photovoltaic front plate, a first packaging film layer 8, a solar cell layer, a second packaging film layer and a photovoltaic backboard which are sequentially stacked, and is characterized in that the solar cell layer comprises a plurality of solar cell slice main bodies arranged in an array, and the solar cell slice main bodies are the photovoltaic cells without main grids.
The utility model has the beneficial effects that:
1. The welding strip is arranged in the first mounting groove, the thin grid line is connected to the second mounting groove in a clamping mode, so that the overall height (thickness) of the photovoltaic cell without the main grid is reduced, the hidden cracking risk of the surface of the photovoltaic cell without the main grid after subsequent photovoltaic lamination can be effectively reduced, the sum of the depth of the first mounting groove and the depth of the second mounting groove is larger than the diameter (width) of the welding strip, the thin grid line can be attached to the outer surface of the solar cell main body, gaps between the thin grid line and the solar cell main body are avoided, and the current collecting efficiency is improved.
2. The fine grid line is connected to the second mounting groove in a clamping mode, the contact area between the fine grid line and the welding strip can be increased, the stability and the reliability of connection are improved, the problem that poor contact occurs between the welding strip and the fine grid line is effectively avoided, after the contact area is increased, the welding strip can collect current on the fine grid line more effectively, and the current collection capacity is effectively improved.
3. The first mounting groove is matched with the second mounting groove, so that the welding strip and the thin grid line can be fixed, the welding strip and the thin grid line can be prevented from being deviated during mounting or lamination, and further breakage of the thin grid line can be avoided.
Drawings
Preferred embodiments of the present utility model will be described in detail below with reference to the attached drawings, to facilitate understanding of the objects and advantages of the present utility model, wherein:
Fig. 1 is a schematic view of a main structure of a solar cell according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram of a solder strip structure according to an embodiment of the present utility model;
Fig. 3 is a schematic view of an internal structure of a solar cell body according to an embodiment of the present utility model;
FIG. 4 is a partial enlarged view corresponding to the position A in FIG. 3 according to an embodiment of the present utility model;
FIG. 5 is a schematic view of the internal structure of a solder strip according to an embodiment of the present utility model;
fig. 6 is a schematic diagram of an internal structure of a solder strip and a fine grid line according to an embodiment of the present utility model.
Reference numerals in the drawings:
The solar cell comprises a solar cell body 1, thin grid lines 2, welding strips 3, a first mounting groove 4, a second mounting groove 5, a first welding part 6, a second welding part 7, a first packaging film layer 8, a conductive substrate 301 and a low-temperature alloy layer 302.
Detailed Description
The utility model is described in further detail below with reference to the drawings and the examples.
The terms of orientation such as up, down, left, right, front, rear, front, back, top, bottom, etc. mentioned or possible in this specification are defined with respect to the configurations shown in the drawings, and the terms "inner" and "outer" refer to the relative concepts of the terms toward or away from the geometric center of a particular component, respectively, and thus may be changed accordingly depending on the location and use state of the component. These and other directional terms should not be construed as limiting terms.
Referring to fig. 1 to 6, disclosed are embodiments of the present utility model:
The photovoltaic module comprises a photovoltaic front plate, a first packaging film layer 8, a solar cell layer, a second packaging film layer and a photovoltaic backboard which are sequentially stacked, wherein the solar cell layer comprises a plurality of solar cell main bodies 1 which are arranged in an array manner, a plurality of thin grid lines 2 are arranged on the solar cell main bodies 1, a plurality of welding strips 3 which are connected with the thin grid lines 2 in a cross manner are arranged on the solar cell main bodies 1, a fixing structure for fixing the thin grid lines 2 is arranged between the solar cell main bodies 1 and the welding strips 3, the fixing structure comprises a plurality of first mounting grooves 4 which are uniformly formed in the solar cell main bodies 1 and used for accommodating the welding strips 3, a plurality of second mounting grooves 5 which are used for being clamped with the thin grid lines 2 are uniformly formed in the welding strips 3, and the sum of the depth of the first mounting grooves 4 and the depth of the second mounting grooves 5 is larger than the diameter of the welding strips 3; the welding strip 3 is arranged in the first mounting groove 4, the thin grid line 2 is clamped on the second mounting groove 5, so that the integral height (thickness) of the photovoltaic cell without the main grid is reduced, the hidden crack risk of the surface of the photovoltaic cell without the main grid after the subsequent photovoltaic lamination can be effectively reduced, the sum of the depth of the first mounting groove 4 and the depth of the second mounting groove 5 is larger than the width of the welding strip 3, the thin grid line 2 can be attached to the outer surface of the solar cell main body 1, gaps between the thin grid line 2 and the solar cell main body 1 are avoided, the current collecting efficiency is influenced, the thin grid line 2 is clamped on the second mounting groove 5, the contact area between the thin grid line 2 and the welding strip 3 can be increased, the stability and the reliability of connection are improved, the problem of poor contact between the welding strip 3 and the thin grid line 2 is effectively avoided, after the contact area is increased, the welding strip 3 can collect the current on the fine grid line 2 more effectively, the current collection capacity is improved effectively, the first mounting groove 4 is matched with the second mounting groove 5, the welding strip 3 and the fine grid line 2 can be fixed, the fine grid line 2 is prevented from being deviated during mounting or lamination, and further breakage of the fine grid line 2 is avoided.
In this embodiment, the first packaging film layer 8 is a PO film or an EVA film.
The thin grid lines 2 extend along a first direction and are uniformly distributed along a second direction, the welding strips 3 extend along the second direction and are uniformly distributed along the first direction, the first direction is perpendicular to the second direction, the first mounting groove is a wire groove which is formed in the solar cell main body 1 and extends along the second direction and is matched with the welding strips 3, and the welding strips 3 and the thin grid lines 2 are conveniently distributed and mounted through the perpendicular arrangement of the first mounting groove and the second mounting groove.
The solder strip 3 includes a conductive substrate 301, and a low-temperature alloy layer 302 coated on the surface of the conductive substrate 301, specifically a low Wen Xiqian bismuth alloy layer, whose melting point is lower than the lamination temperature, and which will melt when the photovoltaic module performs the lamination process.
A first welding portion 6 is disposed between the solder strip 3 and the solar cell body 1, specifically, the low-temperature alloy layer 302 is melted by lamination and flows into the first mounting groove 4 to contact with the solar cell body 1, so as to form the first welding portion 6 for welding the solder strip 3 in the first mounting groove 4.
A second welding part 7 is arranged between the solar cell main body 1 and the thin grid line 2, specifically, the low-temperature alloy layer 302 overflows the first mounting groove 4 through lamination melting and contacts the thin grid line 2, and/or the low-temperature alloy layer 302 flows into the second mounting groove 5 through lamination melting and contacts the thin grid line 2 to form a second welding part 7 for welding the thin grid line 2 on the welding strip 3, and the connection strength of the thin grid line 2 and the welding strip 3 is further improved through the cooperation of the first welding part 6 and the second welding part.
It should be noted that the above embodiments are merely for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solution described in the above embodiments may be modified or some technical features may be equivalently replaced, and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present utility model.
Claims (7)
1. The photovoltaic cell without the main grid comprises a solar cell main body (1), a plurality of thin grid lines (2) arranged on the solar cell main body (1) and a plurality of welding strips (3) which are arranged on the solar cell main body (1) and are connected with the thin grid lines (2) in a crossing mode, and a fixing structure used for fixing the thin grid lines (2) is arranged between the solar cell main body (1) and the welding strips (3).
2. The photovoltaic cell without main grid according to claim 1, wherein each thin grid line (2) extends along a first direction and is uniformly distributed along a second direction, each solder strip (3) extends along the second direction and is uniformly distributed along the first direction, and the first direction and the second direction are mutually perpendicular.
3. The photovoltaic cell without main grid according to claim 2, wherein the first mounting groove (4) is a wire groove which is arranged on the solar cell main body (1) and extends along the second direction to be matched with the welding strip (3).
4. The photovoltaic cell without main grid according to claim 1, wherein the solder strip (3) comprises a conductive substrate (301) and a low-temperature alloy layer (302) coated on the surface of the conductive substrate (301).
5. The gridless photovoltaic cell of claim 4, wherein a first solder joint (6) is provided between the solder strip (3) and the solar cell body (1).
6. The photovoltaic cell without main grid according to claim 4, characterized in that a second soldering part (7) is arranged between the solar cell body (1) and the thin grid line (2).
7. The photovoltaic module comprises a photovoltaic front plate, a first packaging film layer (8), a solar cell layer, a second packaging film layer and a photovoltaic backboard which are sequentially stacked, and is characterized in that the solar cell layer comprises a plurality of solar cell main bodies (1) which are arranged in an array, and the solar cell main bodies (1) are the photovoltaic cells without main grids according to any one of claims 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420217155.XU CN222509902U (en) | 2024-01-30 | 2024-01-30 | Photovoltaic cell without main grid and photovoltaic module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420217155.XU CN222509902U (en) | 2024-01-30 | 2024-01-30 | Photovoltaic cell without main grid and photovoltaic module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN222509902U true CN222509902U (en) | 2025-02-18 |
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ID=94552971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202420217155.XU Active CN222509902U (en) | 2024-01-30 | 2024-01-30 | Photovoltaic cell without main grid and photovoltaic module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN222509902U (en) |
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2024
- 2024-01-30 CN CN202420217155.XU patent/CN222509902U/en active Active
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| GR01 | Patent grant |