CN218536012U - Screen combination and solar cell - Google Patents
Screen combination and solar cell Download PDFInfo
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- CN218536012U CN218536012U CN202222761945.8U CN202222761945U CN218536012U CN 218536012 U CN218536012 U CN 218536012U CN 202222761945 U CN202222761945 U CN 202222761945U CN 218536012 U CN218536012 U CN 218536012U
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Abstract
The application provides a half tone combination and solar cell belongs to photovoltaic technical field. The screen combination comprises a first printing screen, a second printing screen and a third printing screen. The printing part of the first printing screen plate comprises a plurality of auxiliary grid printing structures; the printing part of the second printing screen plate comprises a plurality of main grid welding point printing structures which are distributed at intervals, and the main grid welding point printing structures are configured to be used for printing main grid welding points which are formed on two sides in a first preset direction and are connected with the auxiliary grids on two sides in the extending direction of the auxiliary grids; the printing part of the third printing screen comprises a plurality of anti-breaking grid printing structures for printing a plurality of anti-breaking grids connected between the auxiliary grids, and the screen combination can reduce the preparation cost of the grid lines and improve the light conversion efficiency of the prepared solar cell.
Description
Technical Field
The application relates to the technical field of photovoltaics, in particular to a screen combination and a solar cell.
Background
In the prior art, a screen printing plate is needed for preparing a grid line of a solar cell, but the grid line obtained by using the existing screen printing plate has the problems of large silver consumption and large shading area, so that the preparation cost of the grid line is high, and the conversion efficiency of the prepared solar cell to light is low due to the large shading area of the grid line.
SUMMERY OF THE UTILITY MODEL
An object of the application is to provide a half tone combination and solar cell, can improve the conversion efficiency of the solar cell who obtains of preparation to light when reducing grid line preparation cost.
The embodiment of the application is realized as follows:
in a first aspect, an embodiment of the present application provides a screen combination, including a first printing screen, a second printing screen, and a third printing screen. The printing part of the first printing screen comprises a plurality of auxiliary grid printing structures which are distributed side by side along a first preset direction, and the first preset direction is vertical to the extending direction of the auxiliary grid printing structures; the printing part of the second printing screen plate comprises a plurality of main grid welding point printing structures which are distributed at intervals, and the main grid welding point printing structures are configured to be used for printing main grid welding points which are formed on two sides in a first preset direction and are connected with the auxiliary grids on two sides in the extending direction of the auxiliary grids; the printing part of the third printing screen comprises a plurality of anti-breaking grid printing structures used for printing a plurality of anti-breaking grids connected between the auxiliary grids.
In the technical scheme, the first printing screen is used for forming the auxiliary grid, the second printing screen is used for forming the main grid welding point, and the third printing screen is used for forming the anti-breaking grid. The second printing screen is only used for forming a main grid welding point, and compared with a conventional screen for printing a main grid (the conventional main grid screen directly forms a complete main grid through silver paste), the second printing screen can save the using amount of the silver paste and reduce the preparation cost of grid lines on the one hand, and can reduce the shielding area of the grid lines on the solar cell on the other hand, so that the absorption area of the solar cell to light is increased, and the conversion efficiency of the prepared solar cell to light is increased.
In addition, in the process of preparing the grid lines, multiple groups of screen printing plates are adopted for step-by-step printing, because the preparation processes of the main grid welding points and the auxiliary grids are not completely the same, and multiple screen printing plates are respectively used for printing corresponding grid lines, compared with the mode that one screen printing plate is adopted for carrying out uniform printing, the printing of the main grid welding points and the auxiliary grids is conveniently completed through different printing processes, and therefore the electrical performance of the prepared battery piece can be improved.
In some alternative embodiments, the main grid solder joint printing structure is configured to enable printing: in first direction of predetermineeing, the main bars welding point includes the welding point main part and is located the linkage segment of welding point main part both sides, and in adjacent three vice bars, the both sides of welding point main part in first direction of predetermineeing all are connected with the vice bars in the middle, and the one end that the welding point main part was kept away from to two linkage segments is connected with the vice bars of both sides respectively, and on the extending direction of vice bars, the width of linkage segment is less than the width of welding point main part.
Among the above-mentioned technical scheme, configure into main grid welding point printed structure and realize that can print: in a first preset direction, the welding point main body is connected with the auxiliary grid through connecting sections with smaller widths on two sides; in the extending direction of the auxiliary grid, two sides of the welding point main body are connected with the auxiliary grid instead of the auxiliary grid penetrating through the welding point main body, and the silver consumption of the grid line preparation and the shielding area of the grid line on the battery piece can be further reduced by adjusting the structures of the main grid welding point and the auxiliary grid in two directions.
In some alternative embodiments, the main grid solder joint printing structure is configured to enable printing: the interior of the weld body has a cavity.
In the above technical solution, the main grid solder joint printing structure is configured to be capable of printing: the cavity is formed in the welding point main body, and compared with the formed welding point main body which is of a solid structure, the silver consumption of grid line preparation and the shielding area of the grid line on the solar cell can be reduced to a greater extent.
In some alternative embodiments, the main grid pad printing structures are divided into a plurality of groups, each group of main grid pad printing structures being configured to enable printing: in a first preset direction, a plurality of main grid welding points are arranged in a collinear mode.
In the above technical solution, the main grid solder joint printing structure is configured to be capable of printing: a plurality of main bars welding point collineation setting in first predetermined direction compares in a plurality of main bars welding point non-collineation settings, and the printing of the main bars welding point printed structure of being convenient for forms a plurality of main bars welding point simultaneously.
In some alternative embodiments, the break-preventing grid printing structure is configured to enable printing to: in the extending direction of the auxiliary grids, a plurality of anti-breaking grids are arranged in the area between two corresponding adjacent auxiliary grids of each anti-breaking grid, and the anti-breaking grids are distributed side by side.
In the above technical solution, the anti-breaking grid printing structure is configured to be capable of printing: in the extending direction of the auxiliary grids, a plurality of anti-breaking grids are arranged in the area between two corresponding adjacent auxiliary grids of each anti-breaking grid, and compared with the arrangement of only one anti-breaking grid, the arrangement can play a role in conducting electricity through the rest anti-breaking grids after part of the anti-breaking grids are damaged or broken, so that the normal operation of the battery is ensured.
In some alternative embodiments, the break-preventing grid printing structure is configured to enable printing to: in the area between any two adjacent main grid welding points, any two adjacent anti-breaking grids in the extending direction of the auxiliary grid are arranged in a staggered mode in the first preset direction.
In the above technical solution, the anti-breaking grid printing structure is configured to be capable of printing: in the area between any two adjacent main grid welding points, any two adjacent anti-breaking grids are arranged in a staggered mode in the first preset direction in the extending direction of the auxiliary grid, and compared with collinear arrangement of any two adjacent anti-breaking grids in the first preset direction, the arrangement can reduce the number of the anti-breaking grids, so that the functions of reducing the silver consumption of grid line preparation and the shielding area of the grid line to the solar cell can be achieved.
In some alternative embodiments, the break-preventing grid printing structure is configured to enable printing to: in the first preset direction, in the area between any two adjacent main grid welding points, the distance between any two adjacent anti-breaking grids in the extending direction of the auxiliary grid is equal.
In the above technical solution, the anti-breaking grid printing structure is configured to be capable of printing: in the first preset direction, in the area between any two adjacent main grid welding points, the distance between any two adjacent anti-breaking grids in the extending direction of the auxiliary grid is equal, compared with the difference between the distances between any two adjacent anti-breaking grids in the extending direction of the auxiliary grid, the arrangement is convenient for the anti-breaking grid printing structure to simultaneously print to form a plurality of anti-breaking grids.
In some alternative embodiments, the main grid solder joint print structure is configured to enable printing: in the extending direction of the auxiliary grids, a plurality of main grid welding points are arranged in the area between two corresponding adjacent auxiliary grids of each main grid welding point, and the main grid welding points are distributed side by side.
In the above technical solution, the main grid solder joint printing structure is configured to be capable of printing: in the extending direction of the auxiliary grids, a plurality of main grid welding points are arranged in the area between two corresponding adjacent auxiliary grids of each main grid welding point, and compared with the arrangement of only one main grid welding point, the arrangement can play a role in conducting electricity through other main grid welding points after part of the main grid welding points are damaged or failed, so that the normal operation of the battery is ensured.
In some alternative embodiments, the break-preventing grid printing structure is configured to enable printing to: and in the extending direction of the auxiliary grids, an anti-breaking grid is arranged between any two adjacent main grid welding points.
In the above technical solution, the anti-breaking grid printing structure is configured to be capable of printing: in the extending direction of the auxiliary grid, the anti-breaking grid is arranged between any two adjacent main grid welding points, and compared with the mode of only setting the main grid welding points, the anti-breaking grid can play a role in conducting electricity after the main grid welding points are damaged or failed, so that the normal operation of the battery is ensured.
In a second aspect, the present invention provides a solar cell, wherein the front surface of the solar cell has a sub-grid, a main grid solder point and an anti-breaking grid corresponding to the printing portion of the screen combination provided in the first aspect.
In the above technical solution, the front surface of the solar cell has the sub-grid, the main grid solder point and the anti-breaking grid corresponding to the printing portion of the screen combination provided in the embodiment of the first aspect, and compared with the solar cell with a conventional structure, the solar cell has the advantages of low preparation cost of the grid line and high conversion efficiency to light.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
Fig. 1 is a schematic structural diagram of a first printing screen provided in an embodiment of the present application;
fig. 2 is a schematic structural diagram of a second printing screen provided in the embodiment of the present application;
fig. 3 is a schematic structural view of a third printing screen provided in an embodiment of the present application;
fig. 4 is a schematic structural diagram of a solar cell according to an embodiment of the present disclosure;
fig. 5 is an enlarged view of the structure of the main grid pad in fig. 4.
Icon: 10, combining screen printing plates; 110-a first printing screen; 111-sub-gate printed structures; 120-a second printing screen; 121-main grid solder joint printing structure; 130-a third printing screen; 131-an anti-breaking grid printing structure; 20-a solar cell; 210-main gate pad; 211-a solder joint body; 212-a connecting segment; 220-a sub-gate; 230-a breaking-proof grid;
a-a first preset direction; b-the direction of extension of the sub-grid printed structure.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. 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 application.
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, it need not be further defined and explained in subsequent figures.
In the description of the present application, it is to be noted that the terms "upper", "lower", "vertical", "inside", "outside", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally laid out when products of the application are used, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another, and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or vertical, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present application, it should also be noted that, unless expressly stated or limited otherwise, the terms "disposed" and "connected" are to be construed broadly, and may for example be fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
In the prior art, the existing main grid obtained by screen printing is usually a complete main grid, and the main grid of the type has the problems of large silver consumption and large shading area of a solar cell, so that the preparation cost of the grid line is correspondingly high, and the prepared solar cell has low conversion efficiency on light.
The inventor researches and discovers that the light conversion efficiency of the prepared solar cell can be improved while the preparation cost of the grid line is reduced by adjusting the structure of the main grid screen plate, namely replacing the complete main grid by a plurality of main grid welding points distributed at intervals.
Referring to fig. 1 to 3, in a first aspect, an embodiment of the present application provides a screen assembly 10, which includes a first printing screen 110, a second printing screen 120, and a third printing screen 130. The printing part of the first printing screen 110 includes a plurality of sub-grid printing structures 111, the plurality of sub-grid printing structures 111 are distributed side by side along a first preset direction a, and the first preset direction a is perpendicular to an extending direction b of the sub-grid printing structures; the printing part of the second printing screen 120 includes a plurality of main grid solder printing structures 121, the plurality of main grid solder printing structures 121 are distributed at intervals, and the main grid solder printing structures 121 are configured to be used for printing main grid solder points 210 formed on both sides in the first preset direction a and both sides in the extending direction of the auxiliary grid 220 and connected with the auxiliary grid 220; the printing portion of the third printing screen 130 includes a plurality of anti-breaking grid printing structures 131 for printing a plurality of anti-breaking grids 230 connected between the sub-grids 220.
In the present application, the first printing screen 110 is used to form the sub-grid 220, the second printing screen 120 is used to form the main grid welding points 210, and the third printing screen 130 is used to form the anti-breaking grid 230. Wherein, second printing half tone 120 is only used for forming main grid welding point 210, for the screen version that is used for printing the main grid of conventionality (conventional main grid screen version directly forms a complete main grid through silver thick liquid), can practice thrift the quantity of silver thick liquid on the one hand, reduces the preparation cost of grid line, and on the other hand can reduce the area of sheltering from of grid line to solar cell 20 to improve the absorption area that solar cell 20 was set a camera, and then improve the conversion efficiency that solar cell 20 that the preparation obtained was set a camera.
In addition, in the process of preparing the grid lines, multiple sets of screen printing plates are adopted for step-by-step printing, because the preparation processes of the main grid welding points 210 and the auxiliary grids 220 are not completely the same, and multiple screen printing plates are respectively used for printing corresponding grid lines, compared with the mode that one screen printing plate is adopted for carrying out unified printing, the printing of the main grid welding points 210 and the auxiliary grids 220 can be conveniently completed through different printing processes, and therefore the electrical performance of the prepared solar cell 20 can be improved.
It should be noted that, in the process of manufacturing the gate line, the specific manufacturing sequence is not limited, and may be performed according to a conventional manner in the art.
As an example, in the process of preparing the gate line, the main gate pads 210 are prepared by the second printing screen 120, the sub-gates 220 are prepared by the first printing screen 110, and finally the anti-breaking gates 230 are prepared by the third printing screen 130.
It should be noted that, a plurality of main grid welding points 210 distributed at intervals can replace the complete main grid, because the anti-breaking grid 230 also has a conductive function, in the first predetermined direction a, the main grid welding points 210 and the adjacent anti-breaking grid 230 are matched to exert a conductive function equivalent to the complete main grid.
It should be noted that the number of the main grid pads 210 in the first preset direction a is not limited (that is, the number of the main grid pads 210 divided by one main grid is not limited), and may be adjusted according to actual conductive requirements.
As an example, the number of the main gate pads 210 is 3 to 40 in the first preset direction a.
It should be noted that, in the first predetermined direction a, the distance between any two adjacent main gate pads 210 is not limited.
As an example, in the first preset direction a, the distance between any two adjacent main grid pads 210 is 5 to 50mm.
It should be noted that the specific form of the main grid pad 210 is not limited.
As an example, the main grid solder joint printing structure 121 is configured to enable printing: in a first preset direction a, the main grid welding point 210 includes a welding point main body 211 and connection sections 212 located at two sides of the welding point main body 211, in three adjacent auxiliary grids 220, two sides of the welding point main body 211 in the first preset direction a are all connected with the intermediate auxiliary grid 220, one ends of the two connection sections 212 far away from the welding point main body 211 are respectively connected with the auxiliary grids 220 at two sides, and in the extending direction of the auxiliary grids 220, the width of the connection sections 212 is smaller than that of the welding point main body 211.
In this embodiment, the main grid pad printing structure 121 is configured to enable printing: in the first preset direction a, the welding point main body 211 is connected with the auxiliary grid 220 through the connecting sections 212 with smaller widths at two sides; in the extending direction of the sub-grid 220, two sides of the pad body 211 are connected to the sub-grid 220, but the sub-grid 220 does not penetrate through the pad body 211, and the silver consumption for preparing the grid lines and the shielding area of the grid lines to the solar cell 20 can be further reduced by adjusting the structures of the main grid pad 210 and the sub-grid 220 in two directions.
Note that the spatial configuration of the welding point main body 211 is not particularly limited.
As an example, the pad body 211 may be any one of square, rectangular, triangular, circular, and oval.
It should be noted that the size of the solder joint body 211 is not limited in particular, and can be adjusted according to the actual conductive requirement.
It should be noted that the three-dimensional configuration of the connecting segment 212 is not particularly limited.
As an example, the connection section 212 may be any one of a cylinder and a rectangular parallelepiped.
It should be noted that the size of the connecting segment 212 is not particularly limited, and may be adjusted according to actual conductive requirements.
As an example, the main grid pad printing structure 121 is configured to enable printing: the interior of the pad body 211 has a cavity.
In this embodiment, the main grid pad printing structure 121 is configured to enable printing: the cavity is formed in the welding point main body 211, and compared with the welding point main body 211 which is formed in a solid structure, the silver consumption of the grid line preparation and the shielding area of the grid line to the solar cell 20 can be reduced to a greater extent.
It should be noted that, in the first preset direction a, the distribution manner of the plurality of pad bodies 211 is not particularly limited, that is, the plurality of main grid pads 210 may be arranged collinearly, or the plurality of main grid pads 210 may be arranged non-collinearly.
As an example, the main gate pad printed structures 121 are divided into a plurality of groups, each group of main gate pad printed structures 121 being configured to enable printing: in the first predetermined direction a, a plurality of main grid pads 210 are arranged in a common line.
In this embodiment, the main grid pad printing structure 121 is configured to enable printing: the plurality of main grid welding points 210 are arranged in a collinear manner in the first preset direction a, and compared with the non-collinear arrangement of the plurality of main grid welding points 210, the main grid welding point printing structure 121 can be conveniently printed to form the plurality of main grid welding points 210 at the same time.
As an example, the break-gate-resistant printed structure 131 is configured to enable printing to: in the extending direction of the sub-grids 220, a plurality of the breakage-proof grids 230 are arranged in the area between two corresponding adjacent sub-grids 220 of each breakage-proof grid 230, and the breakage-proof grids 230 are distributed side by side.
In this embodiment, the break-gate-resistant printed structure 131 is configured to enable printing to: in the extending direction of the sub-grids 220, a plurality of anti-breaking grids 230 are arranged in the area between two corresponding adjacent sub-grids 220 of each anti-breaking grid 230, and compared with the arrangement of only one anti-breaking grid 230, the arrangement can play a role of conducting electricity through the rest of the anti-breaking grids 230 after part of the anti-breaking grids 230 are damaged or broken, so that the normal operation of the battery is ensured.
It should be noted that, in the extending direction of the sub-gates 220, the number of the anti-breaking gates 230 in the corresponding region of each anti-breaking gate 230 is not particularly limited, and may be adjusted according to the actual conductive requirement.
As an example, 3 to 40 breakage preventing barriers 230 are provided in the corresponding region of each breakage preventing barrier 230 in the extending direction of the sub-barrier 220.
It should be noted that, in the extending direction of the sub-grid 220, the distance between any two adjacent anti-breaking grids 230 is not limited.
As an example, the distance between any two adjacent breaking prevention fences 230 is 5 to 50mm in the extending direction of the sub-fence 220.
As an example, the anti-breaking gate printing structure 131 is configured to enable printing to: in the region between any two adjacent main gate pads 210, any two adjacent breakage prevention gates 230 are staggered in the first preset direction a in the extending direction of the sub-gate 220.
In this embodiment, the anti-breaking gate printing structure 131 is configured to enable printing to: in the region between any two adjacent main grid welding points 210, any two adjacent anti-breaking grids 230 are arranged in a staggered manner in the first preset direction a in the extending direction of the auxiliary grid 220, and compared with the collinear arrangement in the first preset direction a of any two adjacent anti-breaking grids 230, the arrangement can reduce the number of the anti-breaking grids 230, so that the functions of reducing the silver consumption of grid line preparation and reducing the shielding area of the grid lines to the solar cell 20 can be exerted.
It should be noted that, in the first predetermined direction a, in the region between any two adjacent main grid pads 210, the distance between any two adjacent anti-breaking grids 230 in the extending direction of the auxiliary grid 220 is not particularly limited, and may be set in a form of equal distance or a form of unequal distance.
As an example, the anti-breaking gate printing structure 131 is configured to enable printing to: in the first preset direction a, in the region between any two adjacent main gate pads 210, the spacing between any two adjacent breakage prevention gates 230 in the extending direction of the sub-gate 220 is equal.
In this embodiment, the anti-breaking gate printing structure 131 is configured to enable printing to: in the first preset direction a, in the region between any two adjacent main grid welding points 210, the distance between any two adjacent anti-breaking grids 230 in the extending direction of the auxiliary grid 220 is equal, compared with the distance between any two adjacent anti-breaking grids 230 in the extending direction of the auxiliary grid 220 being unequal, this arrangement facilitates the anti-breaking grid printing structure 131 to simultaneously print and form a plurality of anti-breaking grids 230.
As an example, the main grid solder joint printing structure 121 is configured to enable printing: in the extending direction of the auxiliary gate 220, a plurality of main gate pads 210 are disposed in a region between two corresponding adjacent auxiliary gate 220 of each main gate pad 210, and the plurality of main gate pads 210 are distributed side by side.
In this embodiment, the main grid pad printing structure 121 is configured to enable printing: in the extending direction of the auxiliary gates 220, a plurality of main gate welding points 210 are arranged in the region between two corresponding adjacent auxiliary gates 220 of each main gate welding point 210, and compared with the arrangement of only one main gate welding point 210, the arrangement can play a role in conducting electricity through the rest main gate welding points 210 after part of the main gate welding points 210 are damaged or failed, so that the normal operation of the battery is ensured.
It should be noted that, in the extending direction of the sub-gate 220, the number of the main gate pads 210 in the corresponding region of each main gate pad 210 is not particularly limited, and may be adjusted according to actual conductive requirements.
As an example, 3 to 40 main gate pads 210 are disposed in a corresponding region of each main gate pad 210 in an extending direction of the sub-gate 220.
It should be noted that, in the extending direction of the sub-gate 220, the distance between any two adjacent main gate pads 210 is not limited.
As an example, the distance between any two adjacent main gate pads 210 is 5 to 50mm in the extending direction of the sub-gate 220.
As an example, the anti-breaking gate printing structure 131 is configured to enable printing to: in the extending direction of the sub-gate 220, a breaking prevention gate 230 is disposed between any two adjacent main gate pads 210.
In this embodiment, the anti-breaking gate printing structure 131 is configured to enable printing to: in the extending direction of the auxiliary grid 220, the anti-breaking grid 230 is arranged between any two adjacent main grid welding points 210, and compared with the mode of only arranging the main grid welding points 210, the arrangement can play a role in conducting electricity through the arranged anti-breaking grid 230 after the main grid welding points 210 are damaged or failed, so that the normal operation of the battery is ensured.
It should be noted that, in the extending direction of the sub-grid 220, the distribution manner of the two adjacent anti-breaking grids 230 is not particularly limited, and may be arranged side by side, or may be arranged in a staggered distribution (i.e. in a form of one over another).
As an example, in the extending direction of the sub-gates 220, two adjacent breaking prevention gates 230 are staggered.
In this embodiment, two adjacent anti-breaking grids 230 are staggered in the extending direction of the secondary grid 220, and compared with the side-by-side distribution of two adjacent anti-breaking grids 230, the normal operation of the solar cell 20 can be better ensured after the main grid welding point 210 is damaged or failed.
Referring to fig. 4 and 5, in a second aspect, the present application provides a solar cell 20, and the front surface of the solar cell 20 has a sub-grid 220, a main grid solder joint 210, and an anti-breaking grid 230 corresponding to the printing portion of the screen assembly 10 provided in the first aspect.
Specifically, the solar cell 20 includes a plurality of sub-grids 220, a plurality of main grid pads 210, and a plurality of breakage prevention grids 230. The plurality of auxiliary grids 220 are distributed side by side along a first preset direction a, and the first preset direction a is vertical to the extending direction of the auxiliary grids 220; the plurality of main grid welding points 210 are distributed at intervals along the first preset direction a, and both sides of the main grid welding points 210 in the first preset direction a and both sides of the main grid welding points 210 in the extending direction of the auxiliary grid 220 are connected with the auxiliary grid 220; in the region between any two adjacent main grid welding points 210, a plurality of anti-breaking grids 230 are distributed at intervals along the first preset direction a, and both sides of each anti-breaking grid 230 in the first preset direction a are connected with the auxiliary grid 220.
Further, regarding the further structural design of the secondary grid 220, the main grid welding point 210 and the anti-breaking grid 230, see the description of the first aspect for details, which will not be described herein again.
In the present application, the front surface of the solar cell 20 has the sub-grids 220, the main grid pads 210 and the anti-breaking grids 230 corresponding to the printing portions of the screen combination 10 provided in the embodiment of the first aspect, and compared with the solar cell 20 with the conventional structure, the solar cell 20 has the advantages of low manufacturing cost of the grid lines and high conversion efficiency to light.
Test examples
Electrical Performance testing of the solar cell 20
The test method comprises the following steps:
the front-side solar cell 20 prepared by the screen combination 10 provided by the application is used as an experimental group, the front-side solar cell 20 prepared by the conventional screen combination 10 is used as a control group, then the corresponding front-side solar cell 20 is assembled into a complete cell, and then the cell is respectively contacted with the main grid welding points 210 on the front side of the cell through the palm control pins, so that the electrical property of the cell is tested.
It should be noted that, in consideration of the accuracy and representativeness of the test results, a plurality of batches of front-side solar cells 20 are simultaneously prepared in the experimental group and the control group, then, the corresponding solar cells 20 are correspondingly assembled into a complete cell structure, and then, the electrical performance of the plurality of cells is tested, that is, the final results are all average values.
Table 1 electrical property test results of the battery
| Name of sample | Eta(％) | Uoc(％) | Isc(％) | FF(％) |
| Control group | 23.11 | 0.6934 | 13.598 | 80.92 |
| Experimental group | 23.17 | 0.6938 | 13.624 | 80.93 |
Referring to table 1, as can be seen from the results of electrical performance tests of the experimental group and the comparative group, compared with the conventional screen combination 10, the solar cell 20 prepared by using the screen combination 10 provided in the embodiment of the present application has improved performance in Eta, uoc, isc, FF, and the like, which indicates that the screen combination 10 provided in the embodiment of the present application can improve the electrical performance of the solar cell 20 while saving the manufacturing cost of the gate line.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A screen combination, comprising:
the printing part of the first printing screen comprises a plurality of auxiliary grid printing structures which are distributed side by side along a first preset direction, and the first preset direction is vertical to the extending direction of the auxiliary grid printing structures;
the printing part of the second printing screen comprises a plurality of main grid welding point printing structures which are distributed at intervals and are configured to be used for printing main grid welding points which are formed on two sides in the first preset direction and are connected with the auxiliary grids on two sides in the extending direction of the auxiliary grids; and
and the printing part of the third printing screen plate comprises a plurality of anti-breaking grid printing structures for printing a plurality of anti-breaking grids connected between the auxiliary grids.
2. The screen combination of claim 1, wherein the main grid solder joint printing structure is configured to enable printing of: in the first direction of predetermineeing, the main grid welding point includes the welding point main part and is located the linkage segment of welding point main part both sides is adjacent three in the vice bars, the welding point main part is in first both sides in the direction of predetermineeing all with the centre vice bars are connected, two the linkage segment is kept away from the one end of welding point main part is respectively with both sides vice bars are connected, just are in on the first direction of predetermineeing, the orthographic projection of linkage segment is located in the orthographic projection of welding point main part.
3. The screen combination of claim 2, wherein the main grid solder joint printing structure is configured to enable printing: the interior of the welding point main body is provided with a cavity.
4. The screen combination of any one of claims 1 to 3, wherein the main grid solder joint printing structures are divided into a plurality of groups, each group of main grid solder joint printing structures being configured to enable printing: in the first preset direction, a plurality of main grid welding points are arranged in a collinear mode.
5. The screen combination of any one of claims 1 to 3, wherein the break-bar printing structure is configured to enable printing to: in the extending direction of the auxiliary grids, a plurality of the anti-breaking grids are arranged in the area between two corresponding adjacent auxiliary grids of each anti-breaking grid, and the anti-breaking grids are distributed side by side.
6. The screen combination of any one of claims 1 to 3, wherein the break-bar printing structure is configured to enable printing to: in the area between any two adjacent main grid welding points, any two adjacent anti-breaking grids in the extension direction of the auxiliary grid are arranged in a staggered mode in the first preset direction.
7. The screen combination of claim 6, wherein the break-preventing grid printing structure is configured to enable printing to: in the first preset direction, in the area between any two adjacent main grid welding points, the distance between any two adjacent anti-breaking grids in the extending direction of the auxiliary grid is equal.
8. The screen combination of any one of claims 1 to 3, wherein the main grid solder joint printing structure is configured to enable printing: in the extending direction of the auxiliary grids, a plurality of main grid welding points are arranged in the region between two corresponding adjacent auxiliary grids of each main grid welding point, and the main grid welding points are distributed side by side.
9. The screen combination of claim 8, wherein the break-bar printing structure is configured to enable printing to: and in the extending direction of the auxiliary grids, the anti-breaking grids are arranged between any two adjacent main grid welding points.
10. A solar cell, characterized in that the front surface of the solar cell has the sub-grid, the main grid pads, and the breakage preventing grid corresponding to the printing portion of the screen combination according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222761945.8U CN218536012U (en) | 2022-10-18 | 2022-10-18 | Screen combination and solar cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222761945.8U CN218536012U (en) | 2022-10-18 | 2022-10-18 | Screen combination and solar cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218536012U true CN218536012U (en) | 2023-02-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222761945.8U Active CN218536012U (en) | 2022-10-18 | 2022-10-18 | Screen combination and solar cell |
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| Country | Link |
|---|---|
| CN (1) | CN218536012U (en) |
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2022
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