CN216354236U - SE battery piece and photovoltaic module - Google Patents
SE battery piece and photovoltaic module Download PDFInfo
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- CN216354236U CN216354236U CN202122734595.1U CN202122734595U CN216354236U CN 216354236 U CN216354236 U CN 216354236U CN 202122734595 U CN202122734595 U CN 202122734595U CN 216354236 U CN216354236 U CN 216354236U
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E10/547—Monocrystalline silicon PV cells
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Abstract
The utility model discloses an SE battery piece and a photovoltaic module, wherein the SE battery piece is provided with a grid line and a first laser processing area, the grid line is arranged in the first laser processing area, the grid line is provided with a first end, a second end and a middle part, the first end and the second end are arranged in a back-to-back mode, the middle part is positioned between the first end and the second end, the width of the first laser processing area at the first end is larger than that of the first laser processing area at the middle part, and the width of the first laser processing area at the second end is larger than that of the first laser processing area at the middle part. By adopting the SE cell and the photovoltaic module, the problem that the laser processing area and the metal grid line electrode are easy to deviate, so that the product is unqualified can be solved.
Description
Technical Field
The utility model relates to the technical field of solar power generation equipment, in particular to an SE (selective emitter) cell and a photovoltaic module.
Background
The SE (Selective Emitter) cell is characterized in that heavy doping is carried out on the contact part of a metal grid line electrode and a silicon substrate, and light doping is carried out on the position between the electrodes. The SE cell needs to be subjected to laser doping through laser processing, and then metal grid line electrodes are printed in a laser processing area through screen printing. Deviation easily appears at the tip in the laser processing process, and the mesh also easily takes place to warp at the tip on the half tone, can cause regional and the metal grid line electrode of laser processing to appear shifting easily to lead to the product unqualified.
Disclosure of Invention
The utility model discloses an SE battery piece, which aims to solve the problem that a laser processing area and a metal grid line electrode are easy to deviate, so that a product is unqualified.
In order to solve the problems, the utility model adopts the following technical scheme:
the SE battery piece is provided with a grid line and a first laser processing area, the grid line is arranged in the first laser processing area, the grid line is provided with a first end, a second end and a middle part, the first end and the second end are arranged in an opposite mode, the middle part is located between the first end and the second end, the width of the first laser processing area at the first end is larger than that of the first laser processing area at the middle part, and the width of the first laser processing area at the second end is larger than that of the first laser processing area at the middle part.
Optionally, the width of the first laser processed region gradually increases from the middle portion to the first end, and the width of the first laser processed region gradually increases from the middle portion to the second end.
Optionally, the width of the first laser processing area increases in a step shape from the middle portion to the first end, and the width of the first laser processing area increases in a step shape from the middle portion to the second end.
Optionally, the first laser processing region is provided with a widening region at both the first end and the second end.
Optionally, the width of the first laser processed area at the first end is equal to the width of the first laser processed area at the second end, and the distance from the middle portion to the first end is equal to the distance from the middle portion to the second end.
Optionally, the first laser processing area is in the range of the width of the middle part is 100um ~ 120um, the first laser processing area is in the width of the first end and the first laser processing area is in the range of the width of the second end is 120um ~ 140 um.
Optionally, the SE battery piece is provided with a plurality of the gate lines and a plurality of the first laser processing regions, the plurality of the first laser processing regions and the plurality of the gate lines correspond to each other one to one, and the plurality of the first laser processing regions are uniformly distributed on the SE battery piece.
Optionally, the SE battery piece is further provided with a second laser processing region, the grid lines are disposed in both the first laser processing region and the second laser processing region, and the width of the second laser processing region is equal from the first end to the middle portion and from the middle portion to the second end.
Optionally, the SE battery piece is provided with a plurality of grid lines, a plurality of first laser processing regions and a plurality of second laser processing regions, the SE battery piece has a first side and a second side, the first side and the second side are arranged opposite to each other, and in the plurality of first laser processing regions, a first portion of the first laser processing regions is close to the first side, a second portion of the first laser processing regions is close to the second side, and a plurality of the second laser processing regions are located at the first portion of the first laser processing regions and the second portion of the second laser processing regions between the first laser processing regions, and are a plurality of the first laser processing regions and a plurality of the second laser processing regions are uniformly distributed on the SE battery piece.
A photovoltaic module comprises the SE battery piece.
The technical scheme adopted by the utility model can achieve the following beneficial effects:
by adopting the SE battery piece and the photovoltaic module, the width of the first laser processing area at the first end is larger than that of the first laser processing area at the middle part, and the width of the first laser processing area at the second end is larger than that of the first laser processing area at the middle part, so that a certain space is reserved at the first end and the second end of the first laser processing area, even if deviation occurs in the laser processing process, the laser processing area and the metal grid line electrode are not easy to deviate, the probability that the laser processing area and the metal grid line electrode are easy to deviate is reduced, the product percent of pass is improved, and after a certain space is reserved at the first end and the second end of the first laser processing area, the precision requirement on meshes on the screen plate is reduced, so that even if the meshes on the screen plate are deformed, the screen plate can still be used within an allowable range, therefore, the service life of the screen plate is prolonged.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and not to limit the utility model. In the drawings:
FIG. 1 is a structural diagram of an SE cell in an embodiment of the utility model;
fig. 2 is a schematic structural view of a first laser processing region and a gate line in an embodiment of the utility model;
FIG. 3 is a schematic view of another structure of the first laser processing region and the gate line according to the embodiment of the utility model;
FIG. 4 is a schematic view of another structure of the first laser processing region and the gate line in the embodiment of the utility model;
fig. 5 is a schematic structural diagram of a second laser processing region and a gate line in an embodiment of the utility model.
Description of reference numerals:
100-SE battery piece,
110-gate line, 111-first end, 112-second end, 113-middle part,
120-a first laser processing zone, 121-a widening zone,
130-second laser processing area,
140-a first side edge,
150-second side.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the utility model, and not restrictive of the full scope of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The technical solutions disclosed in the embodiments of the present invention are described in detail below with reference to the accompanying drawings.
As shown in fig. 1 to 5, the SE cell 100 provided by the present invention is formed by heavily doping a contact portion between a metal gate line electrode and a silicon substrate, and lightly doping a position between the metal gate line electrodes, such a structure can reduce the recombination of a diffusion layer, reduce the contact resistance between a light receiving surface metal electrode and the silicon substrate, and improve the short circuit current, the open circuit voltage, and the fill factor of the SE cell 100, thereby improving the photoelectric conversion efficiency.
The SE battery piece 100 is provided with a grid line 110 and a first laser processing region 120, wherein the grid line 110 is a metal grid line, and can be used as a metal grid line electrode, for example, a silver grid line. The first laser processing region 120 is a region where the SE cell piece 100 is laser-doped by laser processing. It should be noted that, the laser doping of the SE cell 100 by laser processing may refer to the related art, and will not be described in detail here.
The grid lines 110 are disposed in the first laser processing region 120, and the grid lines 110 may be printed on the first laser processing region 120 of the SE battery piece 100 by using a screen printing technique, and it should be noted that, reference is made to the related art for printing the grid lines 110 on the first laser processing region 120 of the SE battery piece 100 by using a screen printing technique, and details thereof are not described herein.
In the preparation of the SE battery piece 100, laser doping is performed on the SE battery piece 100 through laser processing, then the grid lines 110 are printed on the first laser processing area 120 of the SE battery piece 100 through a screen printing technology by using a screen printing plate, when printing is performed, meshes of the screen printing plate are opposite to the first laser processing area 120, metal slurry is applied on the screen printing plate, then the metal slurry is extruded, the metal slurry is extruded to penetrate through the meshes and reach the first laser processing area 120 of the SE battery piece 100, and the metal grid lines are formed in the first laser processing area 120 of the SE battery piece 100.
The gate line 110 has a first end 111, a second end 112, and a middle portion 113, the first end 111 being opposite to the second end 112, the middle portion 113 being located between the first end 111 and the second end 112, a width of the first laser processing region 120 at the first end 111 being greater than a width of the first laser processing region 120 at the middle portion 113, and a width of the first laser processing region 120 at the second end 112 being greater than a width of the first laser processing region 120 at the middle portion 113. Herein, the gate line 110 extends in a length direction, and the width refers to a dimension perpendicular to the length direction of the gate line 110.
That is, the widths of the two ends of the first laser processing region 120 are greater than the width of the middle, and a certain space is reserved at the first end 111 and the second end 112 of the first laser processing region 120, so that even if deviation occurs in the laser processing process, the deviation does not easily occur in the laser processing region and the metal gate line electrode, the probability that the deviation easily occurs in the laser processing region and the metal gate line electrode is reduced, and the product yield is improved.
Moreover, after a certain space is left between the first end 111 and the second end 112 of the first laser processing area 120, the precision requirement on the mesh on the screen is reduced, so that even if the mesh on the screen is deformed, the screen can still be used within an allowable range, and therefore, the service life of the screen is prolonged.
Therefore, by adopting the SE battery piece 100 in the embodiment of the present invention, the processing accuracy of the laser processing area and the mesh on the screen is reduced, and meanwhile, since a certain space is left at both the first end 111 and the second end 112 of the first laser processing area 120, the mesh in a certain deformation range can be accepted, even if the mesh on the screen is deformed, the screen can still be used under the condition that the deformation is within the preset range, thereby prolonging the service life of the screen.
In the embodiment of the present invention, the width of the first laser processing region 120 gradually increases from the middle portion 113 to the first end 111, and the width of the first laser processing region 120 gradually increases from the middle portion 113 to the second end 112. That is, the sides of the first laser processed region 120 are inclined to gradually approach the center line from the first end 111 to the middle portion 113. In this embodiment, the width of the first laser processing region 120 gradually increases from the middle portion 113 to the first end 111, and the width of the first laser processing region 120 gradually increases from the middle portion 113 to the second end 112, so that the profile of the side edge of the first laser processing region 120 can be relatively simple, thereby simplifying the laser processing process.
In the embodiment of the utility model, the width of the first laser processing region 120 increases in a step shape from the middle portion 113 to the first end 111, and the width of the first laser processing region 120 increases in a step shape from the middle portion 113 to the second end 112. That is, the sides of the first laser-treated region 120 are stepped, the stepped sides being sequentially distant from the centerline from the middle portion 113 to the first end 111, and the stepped sides being sequentially distant from the centerline from the middle portion 113 to the second end 112. In this embodiment, the width of the first laser processing region 120 increases in a step shape from the middle portion 113 to the first end 111, and the width of the first laser processing region 120 increases in a step shape from the middle portion 113 to the second end 112, so that the profiles of the side edges of the first laser processing region 120 are parallel or perpendicular to the center line, and the positioning is easier.
In an embodiment of the present invention, the first laser processing region 120 is provided with a widening region 121 at both the first end 111 and the second end 112. In the case where the width of the first laser processed region 120 is gradually increased from the middle portion 113 to the first end 111, and the width of the first laser processed region 120 is gradually increased from the middle portion 113 to the second end 112, the widened region 121 may be triangular. In the case where the width of the first laser processed region 120 increases in a stepwise manner from the middle portion 113 to the first end 111, and the width of the first laser processed region 120 increases in a stepwise manner from the middle portion 113 to the second end 112, the widened region 121 may have a stepwise or square shape.
The first laser processing region 120 may include a main processing region and a widened region 121, the main processing region is in a shape of a bar, the widened region 121 is in a shape of a triangle or a step or a square, and the widened region 121 is disposed at the first end 111 and the second end 112 to increase the width of the first end 111 and the second end 112. Thereby allowing the laser processing area and the mesh on the screen to have certain deviation or deformation, so as to reduce the processing precision of the laser processing area and the mesh on the screen, and simultaneously, even if the mesh on the screen is deformed, because the first end 111 and the second end 112 of the first laser processing area 120 both leave certain space, the mesh in a certain deformation range can be accepted, and under the condition that the mesh has a certain deformation range, the screen can still be used, thereby prolonging the service life of the screen
In an embodiment of the present invention, the width of the first laser processed region 120 at the first end 111 is equal to the width of the first laser processed region 120 at the second end 112. The distance from the middle portion 113 to the first end 111 is equal to the distance from the middle portion 113 to the second end 112. The first end 111 and the second end 112 of the first laser processed region 120 are symmetrical, and thus, the shapes of the laser processed regions of the first end 111 and the second end 112 are unified, thereby simplifying processing.
Optionally, the width of the first laser processing region 120 at the middle portion 113 ranges from 100um to 120um, and both the width of the first laser processing region 120 at the first end 111 and the width of the first laser processing region 120 at the second end 112 range from 120um to 140 um. The width of the range can ensure that the first laser processing areas 120 and the meshes of the screen are easily aligned, and the space between the adjacent first laser processing areas 120 is not influenced.
Optionally, the width of the first laser processed region 120 at the intermediate portion 113 ranges from 110 um. The width of the first laser processed region 120 at the first end 111 and the width of the first laser processed region 120 at the second end 112 are both 130 um.
In the embodiment of the present invention, the SE battery piece 100 is provided with a plurality of gate lines 110 and a plurality of first laser processing regions 120, the plurality of first laser processing regions 120 and the plurality of gate lines 110 are in one-to-one correspondence, and the plurality of first laser processing regions 120 are uniformly distributed on the SE battery piece 100.
Specifically, the SE battery piece 100 has a first side 140 and a second side 150, the first side 140 and the second side 150 are disposed opposite to each other, the plurality of first laser processing regions 120 are uniformly distributed on the SE battery piece 100, and the plurality of first laser processing regions 120 are uniformly distributed between the first side 140 and the second side 150.
In this embodiment of the present invention, the SE battery piece 100 is further provided with a second laser processing region 130, the first laser processing region 120 and the second laser processing region 130 are both provided with gate lines 110, and the width of the second laser processing region 130 is equal from the first end 111 to the middle portion 113 to the second end 112. The second laser processing region 130 is in a shape of a stripe, and the width of the second laser processing region 130 is not changed in the length extending direction.
The SE battery piece 100 is provided with a plurality of gate lines 110, a plurality of first laser processing regions 120 and a plurality of second laser processing regions 130, the SE battery piece 100 has a first side edge 140 and a second side edge 150, in the plurality of first laser processing regions 120, a first portion of the first laser processing regions 120 is close to the first side edge 140, a second portion of the first laser processing regions 120 is close to the second side edge 150, the plurality of second laser processing regions 130 are located between the first portion of the first laser processing regions 120 and the second portion of the first laser processing regions 120, and the plurality of first laser processing regions 120 and the plurality of second laser processing regions 130 are uniformly distributed on the SE battery piece 100.
That is, a plurality of laser processing areas are uniformly distributed on the SE cell 100 from the first side edge 140 to the second side edge 150, wherein a first portion of the first laser processing area 120 is close to the first side edge 140, a second portion of the first laser processing area 120 is close to the second side edge 150, and the second laser processing area 130 is located in the middle.
The second laser processed region 130 has a uniform width from the first end 111 to the middle portion 113 to the second end 112, and is a regular square. The second laser treated region 130 is easier to machine than the first laser treated region 120. The mesh on the screen is easy to deform at the edge, so that only the laser processing areas near the first side edge 140 and the second side edge 150 are set as the first laser processing area 120, and the laser processing area in the middle is set as the second laser processing area 130, so that the mesh can be opposite to the laser processing area even if the mesh deforms, and the laser processing process can be simplified as much as possible.
Therefore, with the SE battery piece 100 according to the embodiment of the present invention, a certain space is left at both the first end 111 and the second end 112 of the first laser processing region 120, so that even if a deviation occurs during a laser processing process, the laser processing region and the metal grid line 110 electrode are not easily deviated, and the probability that the laser processing region and the metal grid line 110 electrode are easily deviated is reduced, thereby improving a product yield, and after a certain space is left at both the first end 111 and the second end 112 of the first laser processing region 120, the precision requirement for the mesh on the screen is reduced, so that even if the mesh on the screen is deformed, the screen can still be used within an allowable range, thereby prolonging the service life of the screen.
And a second laser processing region 130 is further provided, the width of the second laser processing region 130 is equal from the first end 111 to the middle portion 113 to the second end 112. The laser processing process can be simplified as much as possible at unnecessary places, thereby improving the production efficiency.
The embodiment of the utility model further provides a photovoltaic module, which includes the above-mentioned SE cell 100, where the SE cell 100 is provided with a gate line 110 and a first laser processing region 120, the gate line 110 is provided in the first laser processing region 120, the gate line 110 has a first end 111, a second end 112 and a middle portion 113, the first end 111 and the second end 112 are disposed opposite to each other, the middle portion 113 is located between the first end 111 and the second end 112, the width of the first laser processing region 120 at the first end 111 is greater than the width of the first laser processing region 120 at the middle portion 113, and the width of the first laser processing region 120 at the second end 112 is greater than the width of the first laser processing region 120 at the middle portion 113.
The photovoltaic module includes a plurality of SE cells 100, and the plurality of SE cells 100 are electrically connected to each other to provide a desired voltage and current, and may be connected in series and then in parallel, for example.
Of course, the photovoltaic module further comprises other structural members such as a frame, tempered glass, a back plate and an EVA (ethylene vinyl acetate) adhesive film. For example, the tempered glass, the EVA film, the SE cell sheet 100, the EVA film, and the back sheet are sequentially laminated and packaged together to form the photovoltaic module.
By adopting the photovoltaic module in the embodiment of the utility model, the widths of the first end 111 and the second end 112 of the first laser processing area 120 are both larger than the width of the middle part 113, so that a certain space is reserved between the first end 111 and the second end 112 of the first laser processing area 120, even if deviation occurs in the laser processing process, the deviation does not easily occur in the laser processing area and the metal grid line electrode, the probability that the deviation easily occurs in the laser processing area and the metal grid line electrode is reduced, and the product yield is improved. Meanwhile, the precision requirement on the meshes on the screen printing plate is reduced, so that even if the meshes on the screen printing plate are deformed, the screen printing plate can still be used within an allowable range, and the service life of the screen printing plate is prolonged.
In the above embodiments of the present invention, the difference between the embodiments is mainly described, and different optimization features between the embodiments can be combined to form a better embodiment as long as they are not contradictory, and further description is omitted here in view of brevity of the text.
The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (10)
1. A SE battery piece (100), characterized in that the SE battery piece (100) is provided with grid lines (110) and a first laser processing area (120), the gate line (110) is arranged in the first laser processing region (120), the gate line (110) has a first end (111), a second end (112) and an intermediate portion (113), the first end (111) being located opposite the second end (112), the intermediate portion (113) being located between the first end (111) and the second end (112), the width of the first laser-treated region (120) at the first end (111) is greater than the width of the first laser-treated region (120) at the middle portion (113), the width of the first laser processed region (120) at the second end (112) is greater than the width of the first laser processed region (120) at the middle portion (113).
2. The SE cell (100) of claim 1, wherein the width of the first laser processed region (120) gradually increases from the middle portion (113) to the first end (111), and the width of the first laser processed region (120) gradually increases from the middle portion (113) to the second end (112).
3. The SE cell (100) of claim 1, wherein the first laser processed region (120) increases in width in a step from the middle portion (113) to the first end (111), and wherein the first laser processed region (120) increases in width in a step from the middle portion (113) to the second end (112).
4. The SE cell (100) of claim 1, wherein the first laser processed region (120) is provided with a widened region (121) at both the first end (111) and the second end (112).
5. The SE cell (100) of claim 1, wherein the width of the first laser processed area (120) at the first end (111) is equal to the width of the first laser processed area (120) at the second end (112), and the distance of the middle portion (113) to the first end (111) is equal to the distance of the middle portion (113) to the second end (112).
6. The SE cell (100) of claim 1, wherein the width of the first laser processed region (120) at the middle portion (113) ranges from 100um to 120um, and wherein the width of the first laser processed region (120) at the first end (111) and the width of the first laser processed region (120) at the second end (112) both range from 120um to 140 um.
7. The SE cell (100) according to claim 1, wherein the SE cell (100) is provided with a plurality of the grid lines (110) and a plurality of the first laser processing regions (120), the plurality of the first laser processing regions (120) and the plurality of the grid lines (110) are in one-to-one correspondence, and the plurality of the first laser processing regions (120) are uniformly distributed on the SE cell (100).
8. The SE cell (100) according to claim 1, wherein the SE cell (100) is further provided with a second laser processed region (130), wherein the grid lines (110) are provided in both the first laser processed region (120) and the second laser processed region (130), and wherein the width of the second laser processed region (130) is equal from the first end (111) to the middle portion (113) and from the middle portion (113) to the second end (112).
9. The SE cell (100) according to claim 8, wherein the SE cell (100) is provided with a plurality of grid lines (110), a plurality of first laser processing regions (120) and a plurality of second laser processing regions (130), the SE cell (100) has a first side edge (140) and a second side edge (150), the first side edge (140) and the second side edge (150) are oppositely disposed, a first portion of the first laser processing regions (120) is close to the first side edge (140) and a second portion of the first laser processing regions (120) is close to the second side edge (150) in the plurality of first laser processing regions (120), a plurality of the second laser processing regions (130) is located between the first portion of the first laser processing regions (120) and the second portion of the first laser processing regions (120), and the plurality of the first laser processing regions (120) and the plurality of the second laser processing regions (130) are uniformly distributed on the first laser processing regions (120) and the plurality of the second laser processing regions (130) SE battery piece (100).
10. A photovoltaic module, characterized by comprising a SE cell (100) according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122734595.1U CN216354236U (en) | 2021-11-09 | 2021-11-09 | SE battery piece and photovoltaic module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122734595.1U CN216354236U (en) | 2021-11-09 | 2021-11-09 | SE battery piece and photovoltaic module |
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| Publication Number | Publication Date |
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| CN216354236U true CN216354236U (en) | 2022-04-19 |
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| CN202122734595.1U Active CN216354236U (en) | 2021-11-09 | 2021-11-09 | SE battery piece and photovoltaic module |
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| CN (1) | CN216354236U (en) |
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2021
- 2021-11-09 CN CN202122734595.1U patent/CN216354236U/en active Active
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