Battery screen printing plate, battery piece and photovoltaic module

Abstract

The utility model discloses a battery screen printing plate, a battery piece and a photovoltaic module. The battery screen printing plate comprises a screen printing plate main body, the number of the electrode printing structures is an even number and is at least six, the electrode printing structures are arranged on the screen printing plate body and distributed on the surface of the screen printing plate body at intervals in the first direction, and a first slitting area extending in the second direction is formed between every two adjacent electrode printing structures; the first direction is perpendicular to the second direction, the number of the first slitting areas is 2N + 1, and N is a positive integer. Therefore, the battery screen printing plate can produce two or more slices, the multi-cutting requirement can be met, the screen printing plate does not need to be replaced frequently, due to the fact that the battery screen printing plate can be compatible with production of a plurality of slices, the direction of the slices of a welding machine does not need to be adjusted during welding, the welding efficiency is improved while the welding effect is guaranteed, and meanwhile the production cost is reduced. Therefore, the efficiency of welding the multiple slices can be improved.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic technology, and in particular to a battery grid, battery cell and photovoltaic module. Background Technology

[0002] Photovoltaic modules are generally made up of cells cut into two pieces. For the same size, cutting the cells into multiple pieces can reduce the module current and thus reduce resistance loss, thereby increasing the power of the photovoltaic module.

[0003] In existing technologies, when using multi-cutting, it is necessary to redraw new battery screens and adjust the tooling of the welding machine accordingly, which is a great waste of effort and resources. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a battery screen that can produce two or more slices, thus meeting the needs of multiple slices without frequent screen replacements. Because this battery screen can accommodate the production of multiple slices, the direction of the slices on the welding machine does not need to be adjusted during welding, thereby improving the efficiency of welding multiple slices while ensuring welding quality.

[0005] This utility model further proposes a battery cell.

[0006] This utility model also proposes a photovoltaic module.

[0007] According to a first aspect of the present invention, a battery screen printing plate includes: a screen printing plate body; a plurality of electrode printing structures, wherein the electrode printing structures are disposed on the screen printing plate body and are spaced apart along a first direction on the surface of the screen printing plate body, and a first slitting region extending along a second direction is formed between two adjacent electrode printing structures, wherein the first direction and the second direction are perpendicular, and the number of the first slitting regions is 2N+1, where N is a positive integer.

[0008] Therefore, this battery screen can produce two or more slices, which can meet the needs of multiple slices without frequent screen replacement. Since this battery screen can be compatible with the production of multiple slices, there is no need to adjust the direction of the slices during welding. This ensures the welding effect and improves the efficiency of welding multiple slices.

[0009] According to some embodiments of the present invention, the width of the first slicing area is d1, and d1 satisfies the following relationship: 1.5mm≤d1≤2.5mm; and / or N is 1, 2, 3, 4 or 5.

[0010] According to some embodiments of the present invention, the screen body has an inwardly recessed slit at the end of the first slitting area.

[0011] According to some embodiments of the present invention, the electrode printing structure includes: a plurality of main gate printing lines, which extend along the first direction and are spaced apart in the second direction; a plurality of sub-gate printing lines, which extend along the second direction and are spaced apart in the first direction, and the plurality of main gate printing lines and the plurality of sub-gate printing lines are arranged intersectingly; wherein, the plurality of main gate printing lines of two adjacent electrode printing structures are arranged opposite to each other with respect to the first slitting region.

[0012] According to some embodiments of the present invention, the width of the end of the main grid printed line is d2, and d2 satisfies the relationship: 5um≤d2≤12um; and / or the width of the middle part of the main grid printed line is d3, and d3 satisfies the relationship: 20um≤d3≤48um.

[0013] According to some embodiments of the present invention, the distance between two adjacent sub-gate printing lines is d4, and d4 satisfies the relationship: 1mm≤d4≤2mm.

[0014] According to some embodiments of the present invention, the electrode printing structure includes: a plurality of pads, and each of the main gate printing lines is provided with at least two pads spaced apart along its length.

[0015] According to some embodiments of the present invention, the multiple electrode printing structures have the same structure; and / or the length and width of the multiple first slitting regions are the same.

[0016] A battery cell according to a second aspect of the present invention includes: a substrate; a plurality of electrode structures, wherein the number of the plurality of electrode structures is even and at least six, the electrode structures are disposed on the substrate and spaced apart along a first direction on the surface of the substrate, and a second slit region extending along a second direction is formed between two adjacent electrode structures, the first direction and the second direction being perpendicular, and the number of the second slit regions being 2N+1, where N is a positive integer.

[0017] A photovoltaic module according to a third aspect of the present invention includes: a plurality of said sub-cells formed by dividing the aforementioned cells through a second slitting section.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0020] Figure 1 This is a schematic diagram of the structure of the battery mesh according to an embodiment of the present utility model;

[0021] Figure 2 This is a structural schematic diagram of the width of the middle part and the middle section of the main grid printing line according to an embodiment of the present utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the battery screen according to an embodiment of the present invention, which can produce two battery cells;

[0023] Figure 4 This is a schematic diagram of the structure of the battery screen according to an embodiment of the present invention, which can produce three battery cells;

[0024] Figure 5 This is a schematic diagram of the structure of a battery screen according to an embodiment of the present invention, which can produce six battery cells.

[0025] Figure label:

[0026] 100. Battery network version;

[0027] 10. Electrode printing structure; 101. Main grid printing line; 102. Sub-grid printing line;

[0028] 20. First dividing zone; 21. Dividing incision;

[0029] 30. Solder pads; 40. Screen printing plate body; 41. Battery cells. Detailed Implementation

[0030] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention are described in detail below.

[0031] The following is for reference. Figures 1-4 Description of battery mesh version 100 according to an embodiment of the present utility model.

[0032] Reference Figure 1 As shown, the battery screen 100 of the first aspect embodiment of the present invention includes: a screen body 40 and a plurality of electrode printing structures 10. The electrode printing structures 10 are disposed on the screen body 40 and are distributed at intervals along a first direction on the surface of the screen body 40. A first slitting region 20 extending along a second direction is formed between two adjacent electrode printing structures 10. The first direction and the second direction are perpendicular. The number of first slitting regions 20 is 2N+1, where N is a positive integer.

[0033] Specifically, the screen printing body 40 is provided with multiple electrode printing structures 10, and a first slitting area 20 extending in the second direction is formed between two adjacent electrode printing structures 10. That is to say, the first slitting area 20 between two adjacent electrode printing structures 10 is not provided with an electrode printing structure 10.

[0034] Since there are multiple electrode printing structures 10, and these multiple electrode printing structures 10 are distributed at intervals along the first direction, which is the length direction of the battery screen 100, multiple first slitting areas 20 can be formed. The setting of the first slitting areas 20 can not only provide a cutting path for the cutting of the battery cell 41, but also avoid the impact on the electrode structure on the battery cell 41 during cutting.

[0035] Depending on the actual number of slices required for the battery cell 41, the battery cell 41 can be cut along the extension direction of the first cutting area 20 corresponding to the battery screen 100. The extension direction of the first cutting area 20 is the second direction, thereby forming multiple slices.

[0036] Furthermore, the number of the first slitting regions 20 is 2N+1, where N is a positive integer, meaning the number of the first slitting regions 20 is odd. This results in an even number of corresponding multiple electrode printed structures 10. As needed, the battery cell 41 can be cut into two or more slices, thus meeting the requirements for multiple cuts without frequent screen replacements. Moreover, since the battery screen 100 can accommodate multiple slices, the direction of the welding machine slices does not need to be adjusted during welding. This ensures the welding effect while improving the efficiency of welding multiple slices.

[0037] Furthermore, when the number of battery screens 100 is m, if the battery cell 41 corresponding to the entire battery screen 100 needs to be cut into two slices, the number of slices produced is 2m. If the battery cell 41 corresponding to the entire battery screen 100 needs to be cut into three slices, the number of slices produced is 3m. If the battery cell 41 corresponding to the entire battery screen 100 needs to be cut into six slices, the number of slices produced is 6m. The value of m ranges from 32 to 78. When m takes the minimum value of 32, if the battery cell 41 corresponding to the entire battery screen 100 needs to be set as two slices, 64 slices can be produced, thus satisfying the required number of slices.

[0038] Therefore, the battery screen 100 can produce two or more slices, which can meet the needs of multiple slices without frequent screen replacement. Since the battery screen can be compatible with the production of multiple slices, the direction of the slices of the welding machine does not need to be adjusted during welding. This ensures the welding effect and improves the efficiency of welding multiple slices.

[0039] According to some embodiments of this utility model, such as Figure 1 As shown, the width of the first slicing region 20 is d1, and d1 satisfies the relationship: 1.5mm≤d1≤2.5mm, where N is 1, 2, 3, 4 or 5.

[0040] When the width d1 of the first slitting area 20 is less than 1.5mm, it is easy to come into contact with the electrode during the cutting process, which may cause damage to the electrode. Therefore, the width d1 of the first slitting area 20 is set to be no less than 1.5mm.

[0041] Furthermore, the width d1 of the first slicing zone 20 can be set to 1.5mm, which can improve the accuracy of slicing and reduce the wear of the battery screen 100.

[0042] Furthermore, when the width d1 of the first slitting area 20 is greater than 2.5mm, the width of the first slitting area 20 is relatively large, which can easily reduce the arrangement space of the electrode printing structure 10 and cause waste of the first slitting area 20. Therefore, the width d1 of the first slitting area 20 is set to be no greater than 2.5mm.

[0043] Furthermore, when N is 1, the number of the first slitting regions 20 is 3, and the number of the corresponding electrode printing structures 10 is four. The battery sheet 41 corresponding to the battery screen 100 can be uniformly cut into two slices along the first slitting region 20, or the battery sheet 41 corresponding to the battery screen 100 can be uniformly cut into four slices along the first slitting region 20. In this way, the battery screen 100 can be compatible with the production of two slices or four slices.

[0044] When N is 2, the number of first slitting regions 20 is 5, and the number of corresponding electrode printing structures 10 is six. The battery sheet 41 corresponding to the battery screen 100 can be uniformly cut into two slices along the first slitting region 20, and the two slices are the same size. Alternatively, the battery sheet 41 corresponding to the battery screen 100 can be uniformly cut into three slices along the first slitting region 20, and the three slices are the same size. Or, the battery sheet 41 corresponding to the battery screen 100 can be uniformly cut into six slices along the first slitting region 20, and the six slices are the same size. In this way, the battery screen 100 can be compatible with the production of two slices, three slices, or six slices.

[0045] When N is 3, the number of first slitting regions 20 is 7, and the number of corresponding electrode printing structures 10 is eight. The battery sheet 41 corresponding to the battery screen 100 can be uniformly cut into two slices along the first slitting region 20, or the battery sheet 41 corresponding to the battery screen 100 can be uniformly cut into four slices along the first slitting region 20, or the battery sheet 41 corresponding to the battery screen 100 can be uniformly cut into eight slices along the first slitting region 20. In this way, the battery screen 100 can be compatible with the production of two slices, four slices, or eight slices.

[0046] When N is 4, the number of first slitting regions 20 is 9, and the corresponding number of electrode printing structures 10 is ten. The battery sheet 41 corresponding to the battery screen 100 can be uniformly cut into two slices along the first slitting region 20, or the battery sheet 41 corresponding to the battery screen 100 can be uniformly cut into five slices along the first slitting region 20, or the battery sheet 41 corresponding to the battery screen 100 can be uniformly cut into ten slices along the first slitting region 20. In this way, the battery screen 100 can be compatible with producing two slices, five slices, and ten slices, exhibiting good adaptability.

[0047] When N is 5, the number of first slitting regions 20 is 11, corresponding to twelve electrode printing structures 10. The battery sheet 41 corresponding to the battery screen 100 can be uniformly cut into two slices along the first slitting region 20, or into six slices, or into twelve slices. This allows the battery screen 100 to be compatible with producing two, six, and twelve slices, demonstrating good adaptability.

[0048] According to some embodiments of this utility model, such as Figure 1 As shown, the width of the first slicing region 20 is d1, and d1 satisfies the relationship: 1.5mm≤d1≤2.5mm.

[0049] When the width d1 of the first slitting area 20 is less than 1.5mm, it is easy to come into contact with the electrode during the cutting process, which may cause damage to the electrode. Therefore, the width d1 of the first slitting area 20 is set to be no less than 1.5mm.

[0050] Furthermore, the width d1 of the first slicing zone 20 can be set to 1.5mm, which can improve the accuracy of slicing and reduce the wear of the battery screen 100.

[0051] Furthermore, when the width d1 of the first slitting area 20 is greater than 2.5mm, the width of the first slitting area 20 is relatively large, which can easily reduce the arrangement space of the electrode printing structure 10 and cause waste of the first slitting area 20. Therefore, the width d1 of the first slitting area 20 is set to be no greater than 2.5mm.

[0052] According to some embodiments of this utility model, such as Figure 1 As shown, the screen printing body 40 has an inwardly recessed slit 21 formed at the end of the first slit area 20.

[0053] The slit 21 is recessed inward, and the battery cell 41 is also provided with a slit. This not only serves as a cutting and positioning tool, but also as a tool to avoid damage to the end of the corresponding first slit area 20 of the battery cell 41 during cutting.

[0054] According to some embodiments of this utility model, such as Figure 1 As shown, the electrode printing structure 10 includes: a plurality of main gate printing lines 101 and a plurality of sub-gate printing lines 102. The plurality of main gate printing lines 101 extend along a first direction and are spaced apart in a second direction. The plurality of sub-gate printing lines 102 extend along the second direction and are spaced apart in the first direction. The plurality of main gate printing lines 101 and the plurality of sub-gate printing lines 102 are arranged intersectingly. The plurality of main gate printing lines 101 of two adjacent electrode printing structures 10 are arranged opposite each other with respect to the first slitting region 20.

[0055] Among them, multiple main grid printed lines 101 extend along the first direction. The main grid printed lines 101 correspond to the main grid lines on the solar cell 41. The main grid lines can effectively collect the current generated by the photovoltaic cell and transmit it to the external circuit.

[0056] Furthermore, the multiple main grid printed lines 101 are spaced apart in the second direction, which can reduce the shading of light by the main grid lines 101 corresponding to the main grid printed lines, thereby improving the power generation efficiency.

[0057] Furthermore, by increasing the number of sub-gate printed lines 102, which are printed to form sub-gate lines, the distance that current travels from the photogenerated carrier generation location to the main gate line can be shortened, thereby reducing resistance. Moreover, the multiple sub-gate printed lines 102 are spaced apart in the first direction, and the multiple sub-gate lines corresponding to the multiple sub-gate printed lines 102 can reduce the obstruction of incident light. This not only increases the effective illumination area but also further improves the photoelectric conversion efficiency of the cell screen 100.

[0058] Furthermore, by intersecting the main gate printed lines 101 and the sub-gate printed lines 102, the main gate lines and sub-gate lines can be printed in an intersecting manner. This shortens the distance of photogenerated carriers from the generation location to the nearest electrode, thereby reducing resistance and energy loss. Moreover, the intersecting main gate lines and sub-gate lines can evenly distribute heat, thus preventing localized overheating.

[0059] Furthermore, the multiple main gate printed lines 101 of two adjacent electrode printed structures 10 are arranged opposite to each other with respect to the first slitting region 20. For example, a first main gate printed line is provided on one side of the first slitting region 20, and a second main gate printed line is provided on the other side of the first slitting region 20. In this way, the first main gate printed line and the second main gate printed line are arranged opposite to each other and are located on the same straight line. Thus, the first main gate printed line can be easily printed to form the first main gate line, and the second main gate printed line can be easily printed to form the second main gate line. This makes it easy to connect the first main gate line to the second main gate line through solder ribbon, thereby realizing the electrical connection between the first main gate line and the second main gate line.

[0060] According to some embodiments of this utility model, such as Figure 2 As shown, the width of the end of the main grid printed line 101 is d2, and d2 satisfies the relationship: 5um≤d2≤12um.

[0061] The end of the main grid printed line 101 is a single track. The main grid printed line 101 can be easily printed to form the main grid line. The end of the main grid line is a single-track main grid. In this way, the end of the main grid line only serves the function of current collection and conduction, and does not serve the function of welding.

[0062] When the width d2 of the end of the main grid printed line 101 is less than 5um, the width of the end of the main grid printed line 101 is small. As a result, the width of the end of the printed main grid line is small, and the end of the main grid line with a smaller width is more likely to generate heat accumulation. Under high current conditions, local overheating will not only affect the battery performance, but may also accelerate the aging of materials and shorten their service life. Therefore, the width of the end of the main grid printed line 101 is set to be no less than 5um.

[0063] Furthermore, the width d2 of the end of the main grid printed line 101 can be set to 5um. This can ensure the consistency of the end width of the main grid printed line 101 and reduce the amount of silver paste consumed.

[0064] When the width d2 of the end of the main grid printed line 101 is greater than 12um, the width of the end of the main grid printed line 101 is large. The large width of the main grid printed line 101 increases the consumption of silver paste, resulting in increased cost. Therefore, the width of the end of the main grid printed line 101 is set to be no greater than 12um.

[0065] According to some embodiments of this utility model, such as Figure 2 As shown, the width of the middle part of the main grid printing line 101 is d3, and d3 satisfies the relationship: 20um≤d3≤48um.

[0066] When the width d3 of the middle part of the main grid printed line 101 is less than 20um, the width of the middle part of the main grid printed line 101 is small. This makes it difficult to carry a high current density, thus failing to meet the high power requirements of the battery cell 41. Therefore, the width d3 of the middle part of the main grid printed line 101 is not less than 20um.

[0067] Furthermore, the width d3 of the middle part of the main grid printed line 101 can be set to 20um. Since the cross-sectional area of ​​the main grid line is inversely proportional to the resistance of the main grid line, setting the width d3 of the middle part of the main grid printed line 101 to 20um and the width d3 of the middle part of the printed main grid line to 20um can significantly reduce the resistance, thereby reducing the energy loss in the current transmission process and improving the overall conversion efficiency of the battery screen 100.

[0068] Furthermore, the width d3 of the middle part of the main gate printed line 101 is 20um, which allows the middle part of the main gate printed line 101 to have a large cross-sectional area, and the middle part of the printed main gate line has a large cross-sectional area, thereby being able to carry a high current density.

[0069] When the width d3 of the middle part of the main grid printed line 101 is greater than 48um, the larger width of the middle part of the main grid printed line 101 will lead to the use of more precious metals (such as silver paste) or other conductive materials, which will increase the material cost and increase the light-blocking area, resulting in a decrease in the photoelectric conversion efficiency of the solar cell 41. Therefore, the width d3 of the middle part of the main grid printed line 101 is set to be no greater than 48um.

[0070] According to some embodiments of this utility model, such as Figure 2 As shown, the distance between two adjacent sub-gate printed lines 102 is d4, and d4 satisfies the relationship: 1mm≤d4≤2mm.

[0071] Specifically, when the distance d4 between two adjacent sub-gate printed lines 102 is less than 1 mm, the smaller distance d4 means that more sub-gate lines occupy the surface of the solar cell 41, reducing the effective illumination area. This blocked light cannot be absorbed by the silicon wafer and converted into electrical energy, resulting in a decrease in photoelectric conversion efficiency. Therefore, the distance between two adjacent sub-gate printed lines 102 should be no less than 1 mm.

[0072] Furthermore, the distance d4 between two adjacent sub-gate printed lines 102 can be set to 2mm. This not only reduces light shading but also increases the number of sub-gate printed lines 102, thereby increasing the number of printed sub-gate lines and improving the photoelectric conversion efficiency of the solar cell 41.

[0073] When the distance d4 between two adjacent sub-gate printed lines 102 is greater than 2 mm, the distance between the two sub-gate printed lines 102 becomes too large. This large spacing can lead to uneven current distribution on the surface of the cell 41, with some areas having excessively high current density while others have excessively low current density. This non-uniformity affects the formation of the electric field inside the cell 41, thus affecting the effective separation and rapid transport of charge carriers. Therefore, the distance d4 between two sub-gate printed lines 102 is set to be no greater than 2 mm.

[0074] According to some embodiments of this utility model, such as Figure 1 As shown, the electrode printing structure 10 includes a plurality of pads 30, and each main gate printing line 101 is provided with at least two pads 30 spaced apart along its length.

[0075] Among them, pad point 30, also known as PAD point, is used for welding solder strip. The setting of pad point 30 can provide a welding position for welding and play a role in accurate welding positioning. Through welding, the solder strip can be firmly attached to the main grid line, which can reduce the risk of loosening or falling off due to vibration or other external factors.

[0076] If the number of solder pads 30 is less than two, that is, if there are fewer than two soldering positions, it is easy to cause the solder ribbon to loosen or fall off. For example, each main grid printing line 101 can be set with three solder pads 30, which can ensure the soldering quality while also reducing the consumption of silver paste.

[0077] According to some embodiments of this utility model, such as Figure 1 As shown, the multiple electrode printing structures 10 have the same structure, and the length and width of the multiple first slitting regions 20 are the same.

[0078] Among them, multiple electrode printed structures 10 have the same structure, which can improve the manufacturing efficiency of electrode printed structures 10 and thus increase production volume.

[0079] Furthermore, since the length and width of the multiple first cutting zones 20 are all the same, this not only improves the accuracy of cutting the battery cell 41, but also increases the cutting efficiency. It eliminates the need to adjust the cutting parameters and path, and also ensures that the battery cell 41 is cut more evenly.

[0080] According to a second aspect embodiment of the present invention, a battery cell 41 includes a substrate and a plurality of electrode structures. The electrode structures are disposed on the substrate and are spaced apart on the surface of the substrate along a first direction. A second slit region extending along a second direction is formed between two adjacent electrode structures. The first direction and the second direction are perpendicular. The number of second slit regions is 2N+1, where N is a positive integer.

[0081] The multiple electrode structures are formed by printing multiple electrode printing structures 10. The battery screen 100 is used in the manufacturing process of the battery cell 41 to print and form the electrode structures on the surface of the battery cell 41 during the screen printing process.

[0082] Furthermore, multiple electrode structures are spaced apart along the first direction, which can form multiple second cutting zones. The setting of the second cutting zones can not only provide a cutting path for the cutting of the battery cell 41, but also avoid the impact on the electrode structure on the battery cell 41 during cutting.

[0083] Since the position of the second slitting area corresponds to the first slitting area 20 of the battery mesh 100, the battery cell 41 can be cut along the extension direction of the second slitting area according to the actual number of slices required by the battery cell 41. The extension direction of the second slitting area is the second direction, thereby forming multiple slices.

[0084] Moreover, since the number of electrode structures is even when the number of the second slicing regions is 2N+1, the battery cell 41 can be cut into two or more slices as needed, which can meet the needs of multiple cuts and avoid frequent screen replacements.

[0085] A photovoltaic module according to a third aspect of the present invention includes: a plurality of sub-cells, wherein the plurality of sub-cells are formed by dividing the cell 41 of the above embodiment through a second slitting section.

[0086] Specifically, when the number of electrode structures is six, the battery cell 41 can be evenly cut into two sub-battery cells along the second slitting region, with the two sub-battery cells being the same size; or the battery cell 41 can be evenly cut into three sub-battery cells along the second slitting region, with the three sub-battery cells being the same size; or the battery cell 41 can be evenly cut into six sub-battery cells along the second slitting region, with the six sub-battery cells being the same size. In this way, the battery grid 100 can be compatible with the production of two sub-battery cells, three sub-battery cells, or six sub-battery cells.

[0087] Similarly, when the number of electrode structures is eight, the battery cell 41 can be evenly cut into two sub-cells along the second slitting section, or into four sub-cells, or into eight sub-cells. This allows the battery grid 100 to be compatible with the production of two, four, or eight sub-cells. Multiple sub-cells are connected by solder ribbons to meet the power requirements of different scenarios.

[0088] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0089] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0090] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery screen, characterized in that, include: Web version main body; Multiple electrode printing structures are disposed on the screen body and spaced apart along a first direction on the surface of the screen body. A first slitting area extending along a second direction is formed between two adjacent electrode printing structures. The first direction and the second direction are perpendicular. The number of the first slitting areas is 2N+1, where N is a positive integer.

2. The battery screen according to claim 1, characterized in that, The width of the first slicing region is d1, and d1 satisfies the following relationship: 1.5mm ≤ d1 ≤ 2.5mm; and / or N is 1, 2, 3, 4 or 5.

3. The battery screen according to claim 1, characterized in that, The main body of the screen printing plate has an inwardly recessed slit at the end of the first slit area.

4. The battery screen according to claim 1, characterized in that, The electrode printing structure includes: Multiple main gate printed lines, wherein the multiple main gate printed lines extend along the first direction and are spaced apart in the second direction; Multiple sub-gate printed lines extend along the second direction and are spaced apart in the first direction; multiple main gate printed lines and multiple sub-gate printed lines are arranged intersectingly. In this configuration, the multiple main grid printed lines of two adjacent electrode printed structures are arranged relative to each other with respect to the first slitting region.

5. The battery screen according to claim 4, characterized in that, The width of the end of the main grid printed line is d2, and d2 satisfies the relationship: 5um ≤ d2 ≤ 12um; and / or The width of the middle part of the main grid printing line is d3, and d3 satisfies the relationship: 20um≤d3≤48um.

6. The battery screen according to claim 4, characterized in that, The distance between two adjacent sub-gate printed lines is d4, and d4 satisfies the relationship: 1mm≤d4≤2mm.

7. The battery screen according to claim 4, characterized in that, The electrode printing structure includes: Multiple pads, each of the main gate printed lines is provided with at least two pads spaced apart along its length.

8. The battery screen according to claim 1, characterized in that, Multiple electrode printing structures have the same structure; and / or The length and width of the multiple first segmented regions are all the same.

9. A battery cell, characterized in that, include: substrate; Multiple electrode structures are disposed on the substrate and spaced apart along a first direction on the surface of the substrate. A second slit region extending along a second direction is formed between two adjacent electrode structures. The first direction and the second direction are perpendicular. The number of the second slit regions is 2N+1, where N is a positive integer.

10. A photovoltaic module, characterized in that, include: Multiple sub-cells, wherein the multiple sub-cells are formed by dividing the cell of claim 9 by the second slitting section.

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