Battery piece and photovoltaic module

Abstract

The utility model provides a battery piece and a photovoltaic assembly. The battery piece comprises a substrate and a metal electrode arranged on the surface of one side of the substrate. The substrate comprises a first edge region, a middle region and a second edge region which are sequentially arranged along a first direction; the metal electrode comprises a plurality of longitudinal grid lines which extend in the first direction and are arranged at intervals in the second direction perpendicular to the first direction, and a plurality of transverse grid lines which extend in the second direction and are arranged at intervals in the first direction; the longitudinal grid lines extend from the first edge area to the second edge area, the transverse grid lines are at least partially connected with the longitudinal grid lines, and the multiple transverse grid lines comprise the first transverse grid lines arranged in the first edge area and the second transverse grid lines arranged in the second edge area. The problem that in the prior art, a photovoltaic cell piece assembly is poor in capacity of collecting currents in all cell pieces is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic cells, and in particular to a cell sheet and a photovoltaic assembly. Background Art

[0002] The iteration of photovoltaic module technology is changing with each passing day. Under the industry trend of reducing costs and increasing efficiency, more and more companies are beginning to make improvements on batteries and their components.

[0003] The photovoltaic cell components in the prior art have the following problems:

[0004] (1) The battery cell is electrically connected to other battery cells through the main grid lines on it, but its current collection ability is poor.

[0005] (2) The connection methods of shingled modules, gap film modules and negative spacing modules are prone to cause chip short circuits, chip cracks and other undesirable phenomena, thus affecting the working efficiency of the battery modules. Utility Model Content

[0006] The main purpose of the utility model is to provide a cell and a photovoltaic module to solve the problem that the photovoltaic cell module in the prior art has a poor ability to collect current in each cell.

[0007] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a battery cell is provided, comprising: a substrate and a metal electrode arranged on a surface of one side of the substrate; the substrate comprises a first edge region, a middle region and a second edge region arranged in sequence along a first direction; the metal electrode comprises a plurality of longitudinal grid lines extending along the first direction and spaced apart along a second direction perpendicular to the first direction, and a plurality of transverse grid lines extending along the second direction and spaced apart along the first direction; the longitudinal grid lines extend from the first edge region to the second edge region, the transverse grid lines are at least partially connected to the longitudinal grid lines, and the plurality of transverse grid lines comprise a first transverse grid line arranged in the first edge region and a second transverse grid line arranged in the second edge region; wherein the first edge region and / or the second edge region comprise a hollow partition.

[0008] Further, there are multiple hollow partitions in the first edge region and / or the second edge region, wherein the multiple hollow partitions are sequentially connected along the second direction; or the multiple hollow partitions are spaced apart along the second direction.

[0009] Furthermore, the longitudinal grid lines and the transverse grid lines in two adjacent hollow partitions are arranged in the same or different manners.

[0010] Furthermore, two corners on the side of the first edge region away from the middle region are right angles, and two corners on the side of the second edge region away from the middle region are chamfered; wherein, the multiple longitudinal grid lines in the first edge region and the multiple longitudinal grid lines in the middle region are connected one by one; and the number of transverse grid lines in the first edge region is less than the number of transverse grid lines in the second edge region.

[0011] Further, the number of longitudinal grid lines in the first edge region ranges from 9 to 150; and / or the number of first transverse grid lines in the first edge region ranges from 1 to 20; and / or the number of longitudinal grid lines in the middle region ranges from 9 to 150; and / or the number of longitudinal grid lines in the second edge region ranges from 9 to 150; and / or the number of second transverse grid lines in the second edge region ranges from 10 to 50; and / or the width of each longitudinal grid line ranges from 0.01 mm to 0.2 mm; and / or the width of each transverse grid line ranges from 0.01 mm to 0.2 mm.

[0012] Further, the number of the longitudinal grid lines in the first edge region ranges from 100 to 150; and / or the number of the longitudinal grid lines in the middle region ranges from 100 to 150.

[0013] According to another aspect of the utility model, a photovoltaic assembly is provided, comprising: a plurality of battery cells, the plurality of battery cells are arranged at intervals along a first direction to form a plurality of battery intervals, and each of the battery cells is the above-mentioned battery cell; a plurality of connecting components, the plurality of connecting components are arranged in a one-to-one correspondence with the plurality of battery intervals, and each connecting component is used to connect two battery cells adjacent to a corresponding battery interval.

[0014] Furthermore, the connecting component includes a conductive metal foil layer, a first adhesive glue layer, a second adhesive glue layer, a first polyethylene film layer, a second polyethylene film layer, a first glue film layer and a second glue film layer, and the conductive metal foil layer includes a first conductive part, an intermediate conductive part and a second conductive part connected in sequence; wherein, a first side of the first conductive part is connected to a first side of a battery cell adjacent thereto, and a second side of the first conductive part is connected to the first polyethylene film layer through the first adhesive glue layer; a first side of the second conductive part is connected to the second polyethylene film layer through the second adhesive glue layer, and a second side of the second conductive part is connected to a second side of a battery cell adjacent thereto; a first side of the intermediate conductive part is connected to the first glue film layer, and a second side of the intermediate conductive part is connected to the second glue film layer.

[0015] Furthermore, the connecting component includes a welding strip and a first adhesive film layer and a second adhesive film layer respectively located on opposite sides of the welding strip, and the welding strip includes a first welding strip portion, an intermediate welding strip portion and a second welding strip portion which are connected in sequence; wherein, the first side of the first welding strip portion is connected to the first side of the battery cell adjacent thereto, and the second side of the first welding strip portion is connected to the first adhesive film layer; the first side of the second welding strip portion is connected to the second adhesive film layer, and the second side of the second welding strip portion is connected to the second side of the battery cell adjacent thereto; the first side of the intermediate welding strip portion is connected to the first adhesive film layer, and the second side of the intermediate welding strip portion is connected to the second adhesive film layer.

[0016] Furthermore, there are multiple welding strips in the connecting component, and the multiple welding strips are arranged at intervals along the second direction.

[0017] Applying the technical solution of the utility model, the cell of the utility model comprises: a substrate and a metal electrode arranged on a surface of one side of the substrate; the substrate comprises a first edge region, a middle region and a second edge region arranged in sequence along a first direction; the metal electrode comprises a plurality of longitudinal grid lines extending along the first direction and arranged at intervals along a second direction perpendicular to the first direction and a plurality of transverse grid lines extending along the second direction and arranged at intervals along the first direction; the longitudinal grid lines extend from the first edge region to the second edge region, the transverse grid lines are at least partially connected to the longitudinal grid lines, and the plurality of transverse grid lines comprise a first transverse grid line arranged in the first edge region and a second transverse grid line arranged in the second edge region; wherein the first edge region and / or the second edge region comprise a hollow partition. In this way, the cell of the utility model solves the problem that the photovoltaic cell assembly in the prior art has a poor ability to collect current in each cell, by removing the transverse grid lines in the middle region and arranging a plurality of longitudinal grid lines and a plurality of transverse grid lines crisscrossing in both the first edge region and the second edge region, thereby improving the energy utilization rate of the solar panel having the cell of the utility model. In addition, the utility model provides hollow partitions in the first edge region and / or the second edge region, thereby reducing the cost of slurry, thereby ensuring the convergence effect and achieving both the production cost and aesthetics of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0019] Figure 1 A front view of an embodiment of a battery cell according to the utility model is shown;

[0020] Figure 2 Shows Figure 1 The structural schematic diagram of the first embodiment of the hollow partition of the battery sheet shown;

[0021] Figure 3 Shows Figure 1 A schematic structural diagram of a second embodiment of a hollow partition of a battery sheet shown;

[0022] Figure 4 Shows Figure 1 A schematic structural diagram of a third embodiment of a hollow partition of a battery sheet shown;

[0023] Figure 5 Shown include Figure 1 A schematic structural diagram of a first embodiment of a photovoltaic assembly of a cell shown;

[0024] Figure 6 Shows Figure 5 A schematic diagram of the structure of the connection components of the photovoltaic module shown;

[0025] Figure 7 Shown include Figure 1 A schematic structural diagram of a second embodiment of a photovoltaic module of a cell shown;

[0026] Figure 8 Shows Figure 7 Schematic diagram of the structure of the connecting components of the photovoltaic module shown.

[0027] The above drawings include the following reference numerals:

[0028] 100, battery cell; 200, connecting component; 300, battery spacer;

[0029] 1. substrate; 10. metal electrode; 11. first edge region; 12. middle region; 13. second edge region; 14. hollow partition;

[0030] 2, longitudinal grid line; 21, first longitudinal grid line; 22, second longitudinal grid line; 23, third longitudinal grid line; 24, fourth longitudinal grid line; 25, fifth longitudinal grid line; 26, sixth longitudinal grid line; 201, sixth grid line segment; 202, seventh grid line segment; 203, eighth grid line segment;

[0031] 3, horizontal gate line; 31, first horizontal gate line; 32, second horizontal gate line; 301, first gate line segment; 302, second gate line segment; 303, third gate line segment; 304, fourth gate line segment; 305, fifth gate line segment;

[0032] 4. conductive metal foil layer; 41. first conductive portion; 42. middle conductive portion; 43. second conductive portion;

[0033] 51. a first bonding glue layer; 52. a second bonding glue layer;

[0034] 61. a first polyethylene film layer; 62. a second polyethylene film layer;

[0035] 71. a first adhesive film layer; 72. a second adhesive film layer;

[0036] 8. Welding strip; 81. First welding strip portion; 82. Middle welding strip portion; 83. Second welding strip portion. DETAILED DESCRIPTION

[0037] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0038] like Figures 1 to 4 As shown, the utility model provides a battery cell, comprising: a substrate 1 and a metal electrode 10 arranged on a side surface of the substrate 1; the substrate 1 comprises a first edge region 11, a middle region 12 and a second edge region 13 arranged in sequence along a first direction; the metal electrode 10 comprises a plurality of longitudinal grid lines 2 extending along the first direction and spaced apart along a second direction perpendicular to the first direction, and a plurality of transverse grid lines 3 extending along the second direction and spaced apart along the first direction; the longitudinal grid lines 2 extend from the first edge region 11 to the second edge region 13, the transverse grid lines 3 are at least partially connected to the longitudinal grid lines 2, and the plurality of transverse grid lines 3 comprise a first transverse grid line 31 arranged in the first edge region 11 and a second transverse grid line 32 arranged in the second edge region 13; wherein the first edge region 11 and / or the second edge region 13 comprise a hollow partition 14.

[0039] In this way, the cell of the utility model solves the problem of poor current collection ability of the photovoltaic cell assembly in the prior art for each cell by removing the transverse grid lines 3 in the middle area 12 and setting a plurality of crisscross longitudinal grid lines 2 and a plurality of transverse grid lines 3 in the first edge area 11 and the second edge area 13, thereby improving the energy utilization rate of the solar panel with the cell of the utility model. In addition, the utility model sets a hollow partition 14 in the first edge area 11 and / or the second edge area 13, thereby reducing the cost of the slurry, ensuring the convergence effect, and having both the production cost and aesthetics of the cell.

[0040] Specifically, the battery cell of the present invention is a rectangular cell.

[0041] In the battery cell of the present invention, there are multiple hollow partitions 14 in the first edge region 11 and / or the second edge region 13, wherein the multiple hollow partitions 14 are sequentially connected along the second direction; or the multiple hollow partitions 14 are spaced apart along the second direction.

[0042] Optionally, the longitudinal grid lines 2 and the transverse grid lines 3 in two adjacent hollow partitions 14 are arranged in the same or different manners.

[0043] Specifically, the two corners on the side of the first edge region 11 away from the middle region 12 are both right angles, and the two corners on the side of the second edge region 13 away from the middle region 12 are both chamfered; wherein, the multiple longitudinal grid lines 2 in the first edge region 11 and the multiple longitudinal grid lines 2 in the middle region 12 are connected one by one; the number of transverse grid lines 3 in the first edge region 11 is less than the number of transverse grid lines 3 in the second edge region 13.

[0044] Preferably, the number of longitudinal grid lines 2 in the first edge area 11 ranges from 9 to 150; and / or the number of transverse grid lines 3 in the first edge area 11 ranges from 1 to 20; and / or the number of longitudinal grid lines 2 in the middle area 12 ranges from 9 to 150; and / or the number of longitudinal grid lines 2 in the second edge area 13 ranges from 9 to 150; and / or the number of transverse grid lines 3 in the second edge area 13 ranges from 10 to 50; and / or the width of each longitudinal grid line 2 ranges from 0.01 mm to 0.2 mm; and / or the width of each transverse grid line 3 ranges from 0.01 mm to 0.2 mm.

[0045] Further preferably, the number of the longitudinal grid lines 2 in the first edge region 11 ranges from 100 to 150; and / or the number of the longitudinal grid lines 2 in the middle region 12 ranges from 100 to 150.

[0046] like Figure 1 and Figure 2 As shown, at least one hollow partition 14 includes: M longitudinal grid lines 2 and N transverse grid lines 3; wherein M=4, N≥5; the M longitudinal grid lines 2 include a first longitudinal grid line 21, a second longitudinal grid line 22, a third longitudinal grid line 23 and a fourth longitudinal grid line 24 which are sequentially arranged at intervals; the first transverse grid line 3, the second transverse grid line 3, the N-1th transverse grid line 3 and the Nth transverse grid line 3 each include a first grid line segment 301, a second grid line segment 302 and a third grid line segment 303 which are sequentially connected. The grid line segment 303; the transverse grid line 3 located between the second transverse grid line 3 and the N-1th transverse grid line 3 includes a first grid line segment 301 and a third grid line segment 303; wherein the two ends of the first grid line segment 301 are respectively connected to the first longitudinal grid line 21 and the second longitudinal grid line 22, the two ends of the second grid line segment 302 are respectively connected to the second longitudinal grid line 22 and the third longitudinal grid line 23, and the two ends of the third grid line segment 303 are respectively connected to the third longitudinal grid line 23 and the fourth longitudinal grid line 24. In this way, the convergence is ensured, and the cost and aesthetics can be achieved.

[0047] like Figure 1 and Figure 3 As shown, at least one hollow partition 14 includes: A longitudinal grid lines 2 and B transverse grid lines 3; wherein A=6, B≥5; the A longitudinal grid lines 2 include first longitudinal grid lines 21, second longitudinal grid lines 22, third longitudinal grid lines 23, fourth longitudinal grid lines 24, fifth longitudinal grid lines 25 and sixth longitudinal grid lines 26 which are arranged in sequence; the first longitudinal grid lines 21, the second longitudinal grid lines 22, the fifth longitudinal grid lines 25 and the sixth longitudinal grid lines 26 each include the first longitudinal grid lines 21, the second longitudinal grid lines 22, the fifth longitudinal grid lines 25 and the sixth longitudinal grid lines 26 which are connected in sequence. The sixth grid line segment 201, the seventh grid line segment 202 and the eighth grid line segment 203; the third longitudinal grid line 23 and the fourth longitudinal grid line 24 both include the sixth grid line segment 201; the first transverse grid line 3, the second transverse grid line 3, the B-1th transverse grid line 3 and the Bth transverse grid line 3 all include the first grid line segment 301, the second grid line segment 302 and the third grid line segment 303, the fourth grid line segment 304 and the fifth grid line segment 305 connected in sequence; the second transverse grid line 3 and the B-1th transverse grid line 3 are connected to each other in sequence. -1 transverse gate lines 3 include a first gate line segment 301 and a fifth gate line segment 305; wherein, two ends of the first gate line segment 301 are respectively connected to the first longitudinal gate line 21 and the second longitudinal gate line 22, two ends of the second gate line segment 302 are respectively connected to the second longitudinal gate line 22 and the third longitudinal gate line 23, two ends of the third gate line segment 303 are respectively connected to the third longitudinal gate line 23 and the fourth longitudinal gate line 24, two ends of the fourth gate line segment 304 are respectively connected to the fourth longitudinal gate line 24 and the fifth longitudinal gate line 25, two ends of the fifth gate line segment 305 are respectively connected to the fifth longitudinal gate line 25 and the sixth longitudinal gate line 26; two ends of the sixth gate line segment 201 are respectively connected to the first transverse gate line 3 and the second transverse gate line 3, two ends of the seventh gate line segment 202 are respectively connected to the second transverse gate line 3 and the B-1th transverse gate line 3, and two ends of the eighth gate line segment 203 are respectively connected to the B-1th transverse gate line 3 and the Bth transverse gate line 3. In this way, convergence is guaranteed while cost and aesthetics are taken into consideration.

[0048] like Figure 1 and Figure 4As shown, at least one hollow partition 14 includes: X longitudinal grid lines 2 and Y transverse grid lines 3; wherein X=6, Y≥8; the X longitudinal grid lines 2 include a first longitudinal grid line 21, a second longitudinal grid line 22, a third longitudinal grid line 23, a fourth longitudinal grid line 24, a fifth longitudinal grid line 25 and a sixth longitudinal grid line 26 which are arranged in sequence; the first transverse grid line 3, the second transverse grid line 3, the Y-2nd transverse grid line 3, the Y-1st transverse grid line 3 and the Yth transverse grid line 3 all include a first grid line segment 301, a second grid line segment 302 and a third grid line segment 303, a fourth grid line segment 304 and a fifth grid line segment 305 which are connected in sequence; the third transverse grid line 3 and the Y-3rd transverse grid line 3 all include a first grid line segment 301, a second grid line segment 302 and a third grid line segment 303, a fourth grid line segment 304 and a fifth grid line segment 305 which are connected in sequence; The grid line segment 302, the fourth grid line segment 304 and the fifth grid line segment 305; the transverse grid lines 3 located between the third transverse grid line 3 and the Y-3 transverse grid line 3 all include the first grid line segment 301 and the fifth grid line segment 305; wherein, the two ends of the first grid line segment 301 are respectively connected to the first longitudinal grid line 21 and the second longitudinal grid line 22, the two ends of the second grid line segment 302 are respectively connected to the second longitudinal grid line 22 and the third longitudinal grid line 23, the two ends of the third grid line segment 303 are respectively connected to the third longitudinal grid line 23 and the fourth longitudinal grid line 24, the two ends of the fourth grid line segment 304 are respectively connected to the fourth longitudinal grid line 24 and the fifth longitudinal grid line 25, and the two ends of the fifth grid line segment 305 are respectively connected to the fifth longitudinal grid line 25 and the sixth longitudinal grid line 26. In this way, the convergence is ensured, and the cost and aesthetics can be achieved.

[0049] like Figures 5 to 8 As shown, the utility model also provides a photovoltaic module, including: a plurality of battery cells 100, the plurality of battery cells 100 are arranged in intervals along a first direction to form a plurality of battery intervals 300, and each battery cell 100 is the above-mentioned battery cell; a plurality of connecting components 200, the plurality of connecting components 200 are arranged in a one-to-one correspondence with the plurality of battery intervals 300, and each connecting component 200 is used to connect two battery cells 100 adjacent to the corresponding battery interval 300.

[0050] like Figure 5 and Figure 6As shown, the connecting component 200 includes a conductive metal foil layer 4, a first adhesive glue layer 51, a second adhesive glue layer 52, a first polyethylene film layer 61, a second polyethylene film layer 62, a first glue film layer 71 and a second glue film layer 72, and the conductive metal foil layer 4 includes a first conductive portion 41, an intermediate conductive portion 42 and a second conductive portion 43 connected in sequence; wherein a first side of the first conductive portion 41 is connected to a first side of an adjacent battery cell 100, and a second side of the first conductive portion 41 is connected to the first polyethylene film layer 61 through the first adhesive glue layer 51; a first side of the second conductive portion 43 is connected to the second polyethylene film layer 62 through the second adhesive glue layer 52, and a second side of the second conductive portion 43 is connected to a second side of an adjacent battery cell 100; a first side of the intermediate conductive portion 42 is connected to the first glue film layer 71, and a second side of the intermediate conductive portion 42 is connected to the second glue film layer 72.

[0051] In this way, it is possible to prevent short circuits between the cells during operation and to prevent displacement of the conductive metal foil layer 4 during the manufacturing process of the photovoltaic panel.

[0052] Specifically, the sum of the thicknesses of the first conductive part 41, the first adhesive glue layer 51 and the first polyethylene film layer 61 is 50um to 150um, and the sum of the thicknesses of the second conductive part 43, the second adhesive glue layer 52 and the second polyethylene film layer 62 is 50um to 150um; the first adhesive film layer 71 and the second adhesive film layer 72 are general photovoltaic adhesive films such as POE and EVA, which need to be pre-cross-linked to achieve a fixing effect. The thickness of the first adhesive film layer 71 and the second adhesive film layer 72 is 10um to 100um.

[0053] like Figure 7 and Figure 8 As shown, the connecting component 200 includes a welding strip 8 and a first adhesive film layer 71 and a second adhesive film layer 72 respectively located on opposite sides of the welding strip 8, and the welding strip 8 includes a first welding strip portion 81, an intermediate welding strip portion 82 and a second welding strip portion 83 which are connected in sequence; wherein, a first side of the first welding strip portion 81 is connected to a first side of an adjacent battery cell 100, and a second side of the first welding strip portion 81 is connected to the first adhesive film layer 71; a first side of the second welding strip portion 83 is connected to the second adhesive film layer 72, and a second side of the second welding strip portion 83 is connected to a second side of an adjacent battery cell 100; a first side of the intermediate welding strip portion 82 is connected to the first adhesive film layer 71, and a second side of the intermediate welding strip portion 82 is connected to the second adhesive film layer 72.

[0054] There are multiple welding strips 8 in the connecting component 200, and the multiple welding strips 8 are arranged at intervals along the second direction.

[0055] Specifically, the first adhesive film layer 71 and the second adhesive film layer 72 are general photovoltaic adhesive films such as POE and EVA, which need to be pre-cross-linked to achieve a fixing effect. The thickness of the first adhesive film layer 71 and the second adhesive film layer 72 is about 50-200um; the number of welding strips 8 in the connecting component 200 is multiple, and the multiple welding strips 8 are arranged at intervals along the length direction of the battery cell 100.

[0056] Preferably, the number of the welding ribbons 8 is 5 to 50.

[0057] In this way, the welding strip 8 is overlapped on the metal electrode 10 of the battery cell 100, and the first adhesive film layer 71 and the second adhesive film layer 72 can not only fix the welding strip 8, but also play a buffering role, fundamentally solving the problem caused by the short distance between the battery cells, eliminating the contact welding points, and greatly saving the cost required for brushing silver paste on the battery.

[0058] From the above description, it can be seen that the above embodiments of the utility model achieve the following technical effects:

[0059] Applying the technical solution of the utility model, the battery cell of the utility model includes: a substrate 1 and a metal electrode 10 arranged on a surface of one side of the substrate 1; the substrate 1 includes a first edge area 11, a middle area 12 and a second edge area 13 arranged in sequence along a first direction; the metal electrode 10 includes a plurality of longitudinal grid lines 2 extending along the first direction and spaced apart along a second direction perpendicular to the first direction, and a plurality of transverse grid lines 3 extending along the second direction and spaced apart along the first direction; the longitudinal grid lines 2 extend from the first edge area 11 to the second edge area 13, the transverse grid lines 3 are at least partially connected to the longitudinal grid lines 2, and the plurality of transverse grid lines 3 include a first transverse grid line 31 arranged in the first edge area 11 and a second transverse grid line 32 arranged in the second edge area 13; wherein the first edge area 11 and / or the second edge area 13 include a hollow partition 14. In this way, the cell of the utility model solves the problem of poor current collection ability of the photovoltaic cell assembly in the prior art for each cell by removing the transverse grid lines 3 in the middle area 12 and setting a plurality of crisscross longitudinal grid lines 2 and a plurality of transverse grid lines 3 in the first edge area 11 and the second edge area 13, thereby improving the energy utilization rate of the solar panel with the cell of the utility model. In addition, the utility model sets a hollow partition 14 in the first edge area 11 and / or the second edge area 13, thereby reducing the cost of the slurry, ensuring the convergence effect, and having both the production cost and aesthetics of the cell.

[0060] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0061] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0062] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0063] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0064] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0065] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A battery cell, characterized in that: include: A substrate (1) and a metal electrode (10) arranged on a surface of one side of the substrate (1); The substrate (1) comprises a first edge region (11), a middle region (12) and a second edge region (13) which are sequentially arranged along a first direction; The metal electrode (10) comprises a plurality of longitudinal grid lines (2) extending along a first direction and arranged at intervals along a second direction perpendicular to the first direction, and a plurality of transverse grid lines (3) extending along the second direction and arranged at intervals along the first direction; the longitudinal grid lines (2) extend from the first edge region (11) to the second edge region (13), the transverse grid lines (3) are at least partially connected to the longitudinal grid lines (2), and the plurality of transverse grid lines (3) comprise a first transverse grid line (31) arranged in the first edge region (11) and a second transverse grid line (32) arranged in the second edge region (13); Therein, the first edge region (11) and / or the second edge region (13) comprises a hollow partition (14).

2. The battery cell according to claim 1, characterized in that: The number of the hollow partitions (14) in the first edge region (11) and / or the second edge region (13) is plural, wherein: A plurality of the hollow partitions (14) are connected in sequence along the second direction; or A plurality of the hollow partitions (14) are arranged at intervals along the second direction.

3. The battery cell according to claim 2, characterized in that: The longitudinal grid lines (2) and the transverse grid lines (3) in two adjacent hollow partitions (14) are arranged in the same or different manners.

4. The battery cell according to claim 1, characterized in that: The two corners of the first edge region (11) on the side away from the middle region (12) are both right angles, and the two corners of the second edge region (13) on the side away from the middle region (12) are both chamfered; wherein: The plurality of longitudinal grating lines (2) in the first edge region (11) and the plurality of longitudinal grating lines (2) in the middle region (12) are connected in a one-to-one correspondence; The number of the first transverse gate lines (31) in the first edge region (11) is less than the number of the second transverse gate lines (32) in the second edge region (13).

5. The battery cell according to claim 1, characterized in that: The number of the longitudinal grid lines (2) in the first edge region (11) ranges from 9 to 150; and / or The number of the first transverse gate lines (31) in the first edge region (11) ranges from 1 to 20; and / or The number of the longitudinal grid lines (2) in the middle area (12) ranges from 9 to 150; and / or The number of the longitudinal grid lines (2) in the second edge region (13) ranges from 9 to 150; and / or The number of the second transverse gate lines (32) in the second edge region (13) ranges from 10 to 50; and / or The width of each of the longitudinal grid lines (2) is in the range of 0.01 mm to 0.2 mm; and / or The width of each of the transverse grid lines (3) is in the range of 0.01 mm to 0.2 mm.

6. The battery cell according to claim 1, characterized in that: The number of the longitudinal grid lines (2) in the first edge region (11) ranges from 100 to 150; and / or The number of the longitudinal grid lines (2) in the middle area (12) ranges from 100 to 150.

7. A photovoltaic module, characterized in that: include: A plurality of battery cells (100), wherein the plurality of battery cells (100) are arranged at intervals along the first direction to form a plurality of battery intervals (300), and each of the battery cells (100) is a battery cell according to any one of claims 1 to 6; A plurality of connecting components (200) are provided in one-to-one correspondence with the plurality of battery compartments (300), and each connecting component (200) is used to connect two battery sheets (100) adjacent to a corresponding battery compartment (300).

8. The photovoltaic module according to claim 7, characterized in that: The connecting component (200) comprises a conductive metal foil layer (4), a first adhesive glue layer (51), a second adhesive glue layer (52), a first polyethylene film layer (61), a second polyethylene film layer (62), a first adhesive film layer (71) and a second adhesive film layer (72); the conductive metal foil layer (4) comprises a first conductive part (41), an intermediate conductive part (42) and a second conductive part (43) which are connected in sequence; wherein: The first side of the first conductive part (41) is connected to the first side of the battery cell (100) adjacent thereto, and the second side of the first conductive part (41) is connected to the first polyethylene film layer (61) via the first adhesive glue layer (51); The first side of the second conductive part (43) is connected to the second polyethylene film layer (62) via the second adhesive glue layer (52), and the second side of the second conductive part (43) is connected to the second side of the battery cell (100) adjacent thereto; The first side of the intermediate conductive part (42) is connected to the first adhesive film layer (71), and the second side of the intermediate conductive part (42) is connected to the second adhesive film layer (72).

9. The photovoltaic module according to claim 7, characterized in that: The connecting component (200) comprises a welding strip (8) and a first adhesive film layer (71) and a second adhesive film layer (72) respectively located on opposite sides of the welding strip (8), the welding strip (8) comprising a first welding strip portion (81), an intermediate welding strip portion (82) and a second welding strip portion (83) connected in sequence; wherein a first side of the first welding strip portion (81) is connected to a first side of the battery cell (100) adjacent thereto, and a second side of the first welding strip portion (81) is connected to the first adhesive film layer (71); The first side of the second welding strip portion (83) is connected to the second adhesive film layer (72), and the second side of the second welding strip portion (83) is connected to the second side of the battery cell (100) adjacent thereto; The first side of the middle welding strip portion (82) is connected to the first adhesive film layer (71), and the second side of the middle welding strip portion (82) is connected to the second adhesive film layer (72).

10. The photovoltaic module according to claim 9, characterized in that: The number of the welding strips (8) in the connecting component (200) is multiple, and the multiple welding strips (8) are arranged at intervals along the second direction.

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