CN218827164U - Photovoltaic module - Google Patents
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- CN218827164U CN218827164U CN202223206434.6U CN202223206434U CN218827164U CN 218827164 U CN218827164 U CN 218827164U CN 202223206434 U CN202223206434 U CN 202223206434U CN 218827164 U CN218827164 U CN 218827164U
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- 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
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Abstract
The utility model discloses a photovoltaic module, which comprises at least one group of battery strings, wherein each battery string comprises at least two battery pieces, two adjacent battery pieces are connected through a welding strip, and each battery piece comprises a main grid; the welding strip comprises a first area and a second area, and the adjacent first area and the second area are connected through a third area; in the direction perpendicular to the battery piece, the orthographic projection of the first area on the battery piece and the orthographic projection of the main grid on the battery piece are not overlapped, the orthographic projection of the second area on the battery piece and the orthographic projection of the main grid on the battery piece are not overlapped, and the orthographic projection of the third area on the battery piece and the orthographic projection of the main grid on the battery piece are partially overlapped. The utility model provides a photovoltaic module has changed the shrink direction of welding back solder strip stress, has kept the shrink space simultaneously, and then has improved because of the crooked deformation of battery that the solder strip shrink caused, has reduced the piece rate of battery piece, has promoted the product yield when reducing the warpage height behind the battery piece welding.
Description
Technical Field
The utility model relates to a photovoltaic technology field, more specifically relates to a photovoltaic module.
Background
The photovoltaic module is a device for converting solar energy into electric energy, and is a core part in a solar power generation system. The photovoltaic module comprises a plurality of groups of battery strings, and each group of battery strings is formed by welding and connecting battery pieces in series through welding strips. At present, welding wires used in the photovoltaic technical field are mainly straight welding strips, and due to the fact that the thermal expansion coefficient of the welding strips is larger than that of the battery piece, after the welding strips are welded and cooled, the welding strips shrink to easily cause bending deformation of the battery piece and increase the risk of splitting.
Therefore, it is desirable to provide a photovoltaic module, which can solve the bending deformation of the cell caused by the shrinkage of the solder strip and reduce the fragment rate of the cell.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a photovoltaic module, including at least a set of battery cluster, the battery cluster includes at least two battery pieces, and two adjacent battery pieces are connected through the solder strip, and the battery piece includes at least one main grid; the solder strip comprises at least one first area extending along a first direction, the first direction is the extending direction of the main grid, the solder strip also comprises at least one second area extending along the first direction, and the adjacent first areas and the second areas are connected through a third area; in the direction perpendicular to the battery piece, the orthographic projection of the first area on the battery piece and the orthographic projection of the main grid on the battery piece are not overlapped, the orthographic projection of the second area on the battery piece and the orthographic projection of the main grid on the battery piece are not overlapped, and the orthographic projection of the third area on the battery piece and the orthographic projection of the main grid on the battery piece are partially overlapped.
Optionally, a bending angle is formed between the first zone and the third zone, and between the second zone and the third zone, the angle of the bending angle is α, and the value range of α is greater than or equal to 90 ° and less than or equal to 135 °.
Optionally, along a second direction, the first region and the second region are respectively located on two sides of the main gate, and the second direction intersects with the first direction; and along the second direction, the adjacent first welding strip sections and the second welding strip sections are arranged in a staggered mode.
Optionally, the battery piece further comprises at least one fine grid arranged along the first direction and extending along the second direction; in the direction perpendicular to the battery piece, the orthographic projection of the first area on the battery piece and the orthographic projection of the fine grid on the battery piece are partially overlapped, the orthographic projection of the second area on the battery piece and the orthographic projection of the fine grid on the battery piece are partially overlapped, and the orthographic projection of the third area on the battery piece and the orthographic projection of the fine grid on the battery piece are at least partially overlapped.
Optionally, the third region further comprises a bonding region.
Optionally, in a direction perpendicular to the battery piece, an orthographic projection of the welding area on the battery piece and an orthographic projection of the main grid of the battery piece on the battery piece are partially overlapped, and the orthographic projection of the welding area on the battery piece and an orthographic projection of the fine grid of the battery piece on the battery piece are at least partially overlapped.
Optionally, the length extension direction of the weld zone is the same as the length extension direction of the third region.
Optionally, the ratio of the length of the third region to the length of the weld zone is in the range of 2-20.
Optionally, the length of the third zone ranges from 2mm to 6mm.
Optionally, in the second direction, a distance from the main grid to each first region is equal to a distance from the main grid to each second region.
Compared with the prior art, the utility model provides a photovoltaic module has realized following beneficial effect at least:
the utility model provides a photovoltaic module, through taking the bow-shaped solder strip of buckling into with the straight welding, first district and second district are arranged respectively in the both sides of main bars, utilize and the third district that main bars overlapped will weld the area and weld with main bars together, the shrink direction of welding back solder strip stress has been changed, the shrink space has been kept simultaneously, and then the battery bending deformation that the improvement caused because of welding the area shrink, the piece rate of battery piece has been reduced when reducing the warpage height after the battery piece welding, promote the product yield.
Of course, it is not necessary for any product of the present invention to achieve all of the above-described technical effects simultaneously.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic structural diagram of a cell with a solder strip in a photovoltaic module provided by the present invention;
FIG. 2 is a schematic diagram of the structure of region A in FIG. 1;
FIG. 3 is a schematic diagram of a structure of a region B in FIG. 2;
FIG. 4 is a schematic view of another structure of region B in FIG. 2;
fig. 5 is another structure diagram of the region B in fig. 2.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Referring to fig. 1-2, fig. 1 is a schematic structural diagram of a cell with a solder strip in a photovoltaic module according to the present invention; fig. 2 is a schematic structural view of region a in fig. 1. The embodiment provides a photovoltaic module, which comprises at least one group of cell strings, wherein each cell string comprises at least two cell pieces 10, every two adjacent cell pieces 10 are connected through a welding strip 20, and each cell piece 10 comprises at least one main grid 11;
the solder strip 20 comprises at least one first area 21 extending along a first direction X, the first direction X is the extending direction of the main grid 11, the solder strip 20 further comprises at least one second area 22 extending along the first direction X, the adjacent first areas 21 and second areas 22 are connected through a third area 23, the solder strip 20 is used for connecting the battery pieces 10 together, and the output voltage and power of the photovoltaic module can be increased while conducting and collecting electricity;
in the direction perpendicular to the battery piece 10, the orthographic projection of the first region 21 on the battery piece 10 and the orthographic projection of the main grid 11 on the battery piece 10 do not overlap, the orthographic projection of the second region 22 on the battery piece 10 and the orthographic projection of the main grid 11 on the battery piece 10 do not overlap, and the orthographic projection of the third region 23 on the battery piece 10 and the orthographic projection of the main grid 11 on the battery piece 10 partially overlap.
Specifically, the photovoltaic module comprises a group of cell strings, each cell string comprises two cell pieces 10, every two adjacent cell pieces 10 are connected through a welding strip 20, the welding strips 20 can be made of tin-clad copper, the cell pieces 10 can comprise twelve main grids 11, workers can design the number of the main grids 11 according to actual requirements, the number of the main grids is not specifically limited, and the main grids are used for collecting currents led out by fine grids;
the solder ribbon 20 may include eight first areas 21 extending along the first direction X, the number of the first areas 21 may be multiple, eight examples are provided in this embodiment, and a worker may design the number of the first areas 21 according to actual conditions, and the number of the first areas 21 is not specifically limited; the first direction X is an extending direction of the main grid 11, the solder strip 20 may further include seven second regions 22 extending along the first direction X, the number of the second regions 22 may be multiple, this embodiment is exemplified by seven, a worker may design the number of the second regions 22 according to an actual application, and the number of the second regions 22 is not specifically limited; the adjacent first area 21 and the second area 22 are connected through a third area 23, and a worker bends the straight welding strip into an arched welding strip 20 through a bending mechanism;
in the direction perpendicular to the cell piece 10, the orthographic projection of the first region 21 on the cell piece 10 and the orthographic projection of the main grid 11 on the cell piece 10 do not overlap, the orthographic projection of the second region 22 on the cell piece 10 and the orthographic projection of the main grid 11 on the cell piece 10 do not overlap, the orthographic projection of the third region 23 on the cell piece 10 and the orthographic projection of the main grid 11 on the cell piece 10 partially overlap, namely the first region 21 and the second region 22 are respectively positioned on two sides of the main grid 11, and the third region 23 connecting the first region 21 and the second region 22 overlaps with the main grid 11.
During the specific use, the staff uses the mechanism of buckling to buckle into bow-shaped solder strip 20 with the straight solder strip, arranges first district 21 and second district 22 respectively in main bars 11 both sides, and third district 23 and main bars 11 part overlap weld in the part that third district 23 and main bars 11 overlap, makes solder strip 20 and main bars 11 welding together, connects two adjacent battery clusters through same solder strip 20.
Compared with the prior art, the photovoltaic module provided by the embodiment at least realizes the following beneficial effects:
this embodiment provides a photovoltaic module, through buckling into bow-shaped solder strip with the direct welding area, first district and second district are arranged respectively in the both sides of main bars, utilize the third district with main bars overlapping will weld the area and weld with main bars together, the shrink direction of welding the area stress after having changed the welding, the shrink space has been remain simultaneously, and then improve the crooked deformation of battery because of welding the area shrink and cause, the piece rate of battery piece has been reduced when reducing the warpage height behind the battery piece welding, promote the product yield.
In one embodiment, fig. 3 is a schematic diagram of a structure of a region B in fig. 2; FIG. 4 is a schematic view of another structure of region B in FIG. 2; fig. 5 is another structure diagram of the region B in fig. 2. Referring to fig. 3-5, a bending angle is formed between the first region 21 and the third region 23, and between the second region 22 and the third region 23, the bending angle is α, and the value range of α is 90 ° -135 ° -23
Specifically, when the bending angle between the first region 21 and the third region 23 and the bending angle between the second region 22 and the third region 23 are smaller than 90 °, the first region 21 and the second region 22 overlap along the second direction Y, which results in waste of the solder ribbon 20 and increases the production cost, and when the bending angle between the first region 21 and the third region 23 and the bending angle between the second region 22 and the third region 23 are greater than 135 °, the shrinkage stress of the solder ribbon 20 in the first direction X after welding is too large, which easily causes cell warpage, and therefore, the bending angle between the first region 21 and the third region 23 and the bending angle between the second region 22 and the third region 23 are set to 90 ° -135 °, which not only avoids waste of the solder ribbon 20 and reduces the production cost, but also reduces the shrinkage stress of the solder ribbon 20 after welding in the first direction X, and avoids cell warpage; specifically, the bend angle between the first and third regions 21, 23 and the bend angle between the second and third regions 22, 23 can be 90 °, 100 °, 110 °, 120 °, or 135 °.
In an alternative embodiment, with continued reference to fig. 3, the solder ribbon 20 includes at least one first region 21 extending along a first direction X, the first direction X being an extending direction of the main grid 11, and at least one second region 22 extending along the first direction X, and adjacent first regions 21 and second regions 22 are connected by a third region 23; the bending angles between the first area 21 and the third area 23 and between the second area 22 and the third area 23 are both 90 degrees, and the shrinkage direction of the welding strip stress after welding can be better changed by setting the bending angles between the first area 21 and the third area 23 and between the second area 22 and the third area 23 to be both 90 degrees.
In an alternative embodiment, with continued reference to fig. 4, the solder ribbon 20 includes at least one first region 21 extending along a first direction X, the first direction X being an extending direction of the main grid 11, and at least one second region 22 extending along the first direction X, and adjacent first regions 21 and second regions 22 are connected by a third region 23; the bending angles between the first area 21 and the third area 23 and between the second area 22 and the third area 23 are both 120 degrees, and by setting the bending angles between the first area 21 and the third area 23 and between the second area 22 and the third area 23 to be both 120 degrees, the cost can be reduced while changing the shrinkage direction of the welding strip stress after welding.
In an alternative embodiment, as shown with continued reference to fig. 5, the solder ribbon 20 includes at least one first region 21 extending along a first direction X, the first direction X being an extending direction of the main grid 11, and at least one second region 22 extending along the first direction X, and adjacent first regions 21 and second regions 22 are connected by a third region 23; the bend angles between first region 21 and third region 23, and between second region 22 and third region 23 are both 135 deg., and by providing a bend angle of 135 deg. between first region 21 and third region 23, and between second region 22 and third region 23, the cost is better reduced.
In one embodiment, as shown with continued reference to fig. 1-2, the first region 21 and the second region 22 are respectively located on both sides of the main gate 11 along a second direction Y, which intersects the first direction X;
first solder strip sections 24 are formed between every two adjacent third regions 23 and the first region 21 along the first direction X, second solder strip sections 25 are formed between every two adjacent third regions 23 and the second region 22 along the first direction X, and the adjacent first solder strip sections 24 and the second solder strip sections 25 are arranged in a staggered mode along the second direction Y.
Specifically, by respectively arranging the first region 21 and the second region 22 on two sides of the main grid 11, a shrinkage deformation allowance is provided for shrinkage of the welded solder strip 20 along the first direction X, and the solder strip 20 is prevented from being stretched integrally.
In one embodiment, as shown with continued reference to fig. 1-5, the cell 10 further includes at least one fine grid 12 arranged along the first direction X and extending along the second direction Y;
in the direction perpendicular to the cell piece 10, the orthographic projection of the first region 21 on the cell piece 10 and the orthographic projection of the fine grid 12 on the cell piece 10 are partially overlapped, the orthographic projection of the second region 22 on the cell piece 10 and the orthographic projection of the fine grid 12 on the cell piece 10 are partially overlapped, and the orthographic projection of the third region 23 on the cell piece 10 and the orthographic projection of the fine grid 12 on the cell piece 10 are at least partially overlapped.
Specifically, the fine grid 12 is used for guiding out the current generated inside the cell 10; by designing the first region 21 extending along the first direction X to be perpendicular to the fine grid 12 and the second region 22 extending along the first direction X to be perpendicular to the fine grid 12, it can be ensured that the bending angle angles between the first region 21 and the third region 23 and between the second region 22 and the third region 23 are the same, the first region 21 being perpendicular to the fine grid 12 and perpendicular to the fine grid 12 along the second region 22 can save the cost of the solder strip 20, by designing the third region 23 not to be perpendicular to the fine grid 12, the shrinkage direction of the stress of the solder strip 20 after soldering can be changed, and the bending deformation of the battery piece 10 caused by the shrinkage of the solder strip 20 can be improved.
In one embodiment, as shown with continued reference to fig. 3-5, the third region 23 further includes a weld zone 231.
Specifically, the welding with the main grid 11 is realized through the welding region 231 of the third region 23, the part of the third region 23 except the welding region 231 is not welded, and a part of non-welding region is reserved in the third region, so that a margin can be provided for the shrinkage of the third region 23 after welding, and the bending deformation of the third region 23 is avoided.
In one embodiment, as shown with continued reference to fig. 3-5, in a direction perpendicular to the battery piece 10, an orthographic projection of the welding region 231 on the battery piece 10 and an orthographic projection of the main grid 11 of the battery piece 10 on the battery piece 10 partially overlap, and an orthographic projection of the welding region 231 on the battery piece 10 and an orthographic projection of the fine grid 12 of the battery piece 10 on the battery piece 10 at least partially overlap.
Specifically, the welding region 231 is located in the middle of the third region 23, and in the direction perpendicular to the battery piece 10, the orthographic projection of the welding region 231 on the battery piece 10 and the orthographic projection of the main grid 11 of the battery piece 10 on the battery piece 10 partially overlap, the orthographic projection of the welding region 231 on the battery piece 10 and the orthographic projection of the fine grid 12 of the battery piece 10 on the battery piece 10 at least partially overlap, and the welding region 231 is arranged in the middle of the third region 23, so that the welding process is facilitated to be reduced.
In one embodiment, as shown with continued reference to fig. 3-5, the direction of the length extension of the weld zone 231 is the same as the direction of the length extension of the third region 23.
Specifically, when the solder ribbon 20 is soldered to the main grid 11, the soldering direction is the same as the extending direction of the third region 23, so that the length extending direction of the solder region 231 is the same as the length extending direction of the third region 23, and the length extending direction of the solder region 231 is set to be the same as the length extending direction of the third region 23, so that the effect of stress warpage resistance affecting the entire battery piece 10 can be avoided.
In one embodiment, and with continued reference to fig. 3-5, the ratio of the length of the third region 23 to the length of the weld zone 231 ranges from 2 to 20.
Specifically, when the ratio of the length of the third region 23 to the length of the welding region 231 is less than 2, the length of the welding region 231 is too large, which easily causes the battery piece 10 to warp, and when the ratio of the length of the third region 23 to the length of the welding region 231 is greater than 20, the length of the welding region 231 is too small, which is not beneficial to bending and stress dispersion of the welding strip 20, therefore, setting the ratio of the length of the third region 23 to the length of the welding region 231 in the range of 2-20 can not only avoid the battery piece 10 from warping, but also be beneficial to bending and stress dispersion of the welding strip 20; specifically, the ratio of the length of the third region 23 to the length of the weld region 231 may be 2, 7, 12, 17, or 20.
In one embodiment, as shown with continued reference to FIGS. 3-5, the length of the third zone 23 ranges from 2mm to 6mm.
Specifically, when the length of the third area 23 is less than 2mm, the length of the third area 23 is too short, which increases the difficulty of the welding process, and when the length of the third area 23 is greater than 6mm, the length of the third area 23 is too long, which causes the waste of the welding strip 20, so that the length range of the third area 23 is set to 2mm-6mm, which not only reduces the difficulty of the welding process, but also avoids the waste of the welding strip 20; in particular, the length of the third zone 23 may be 2mm, 3mm, 4mm, 5mm or 6mm.
In an embodiment, with continued reference to fig. 1-5, each first region 21 is at the same distance from the main grid 11 as each second region 22 is from the main grid 11, along the second direction Y.
Specifically, the distance from each first region 21 to the main grid 11 is equal to the distance from each second region 22 to the main grid 11, so that the first regions 21 and the second regions 22 are uniformly distributed on two sides of the main grid 11, the length of each third region 23 is equal, and waste of the solder strips 20 is avoided.
According to the above embodiment, the utility model provides a photovoltaic module has realized following beneficial effect at least:
the utility model provides a photovoltaic module, through taking the bow-shaped solder strip of buckling into with the direct welding, first district and second district are arranged respectively in the both sides of main bars, utilize and weld the area with the welding of main bars overlapping third district together, the shrink direction of welding back solder strip stress has been changed, the shrink space has been kept simultaneously, and then improve the crooked deformation of battery because of welding the shrink of area and causing, the piece rate of battery piece has been reduced when reducing the warpage height after the battery piece welding, promote the product yield.
Although some specific embodiments of the present invention have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (10)
1. A photovoltaic module is characterized by comprising at least one group of cell strings, wherein each cell string comprises at least two cell pieces, every two adjacent cell pieces are connected through a welding strip, and each cell piece comprises at least one main grid;
the solder strip comprises at least one first area extending along a first direction, the first direction is the extending direction of the main grid, the solder strip further comprises at least one second area extending along the first direction, and the adjacent first areas and the adjacent second areas are connected through a third area;
along the direction perpendicular to the battery piece, the orthographic projection of the first area on the battery piece and the orthographic projection of the main grid on the battery piece are not overlapped, the orthographic projection of the second area on the battery piece and the orthographic projection of the main grid on the battery piece are not overlapped, and the orthographic projection of the third area on the battery piece and the orthographic projection of the main grid on the battery piece are partially overlapped.
2. The photovoltaic module of claim 1, wherein a bend angle is formed between the first zone and the third zone, and between the second zone and the third zone, wherein the bend angle is α, and wherein α is in a range of 90 ° to 135 °.
3. The photovoltaic module of claim 1, wherein the first and second regions are on opposite sides of the primary grid along a second direction that intersects the first direction;
and a first welding strip section is formed between every two adjacent third areas and the first area along the first direction, a second welding strip section is formed between every two adjacent third areas and the second area along the first direction, and the adjacent first welding strip sections and the adjacent second welding strip sections are arranged in a staggered mode along the second direction.
4. The photovoltaic module of claim 1, wherein the cell sheet further comprises at least one fine grid arranged along the first direction and extending along a second direction, the second direction intersecting the first direction;
along the direction perpendicular to the battery piece, the orthographic projection of the first area on the battery piece and the orthographic projection of the fine grid on the battery piece are partially overlapped, the orthographic projection of the second area on the battery piece and the orthographic projection of the fine grid on the battery piece are partially overlapped, and the orthographic projection of the third area on the battery piece and the orthographic projection of the fine grid on the battery piece are at least partially overlapped.
5. The photovoltaic assembly of claim 1, wherein the third region further comprises a weld zone.
6. The photovoltaic module according to claim 5, wherein, in a direction perpendicular to the cell sheet, an orthographic projection of the welding area on the cell sheet and an orthographic projection of the main grid of the cell sheet on the cell sheet partially overlap, and an orthographic projection of the welding area on the cell sheet and an orthographic projection of the fine grid of the cell sheet on the cell sheet at least partially overlap.
7. Photovoltaic module according to claim 5, characterized in that the direction of extension of the length of the welding zone is the same as the direction of extension of the length of the third zone.
8. The photovoltaic module of claim 7, wherein the ratio of the length of the third zone to the length of the weld zone is in the range of 2-20.
9. The photovoltaic module of claim 8, wherein the length of the third zone is in the range of 2mm to 6mm.
10. A photovoltaic module according to claim 3 or 4, wherein each of the first regions is at the same distance from the main grid as each of the second regions in the second direction.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223206434.6U CN218827164U (en) | 2022-11-30 | 2022-11-30 | Photovoltaic module |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223206434.6U CN218827164U (en) | 2022-11-30 | 2022-11-30 | Photovoltaic module |
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| CN218827164U true CN218827164U (en) | 2023-04-07 |
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| CN202223206434.6U Active CN218827164U (en) | 2022-11-30 | 2022-11-30 | Photovoltaic module |
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