Battery piece, photovoltaic module and photovoltaic power generation system
By setting intersecting gate line body and connecting gate lines on the cell, the welding alignment offset problem is solved, welding reliability and current collection ability are improved, photoelectric conversion efficiency and component performance are improved.
Patent Information
- Application Number
- CN202422381014.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-29
- Publication Date
- 2025-09-02
- Estimated Expiration
- 2034-09-29
AI Technical Summary
In the prior art, there is a problem of alignment offset between the gate lines and welding tapes of the battery cells, which leads to high difficulty in welding and affects the production difficulty of the battery cells and the photoelectric conversion efficiency.
Set the gate line body and the connecting gate line on the cell to make them intersect, increase the gate line area, reduce the difficulty of welding alignment, and optimize the current collection path through interlaced or relatively arranged connecting gate lines.
It improves welding reliability and current collection ability, reduces production difficulty, and improves photoelectric conversion efficiency and overall performance of components.
Smart Images
Figure CN223297985U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of photovoltaic components, in particular to a battery cell, a photovoltaic component and a photovoltaic power generation system. Background Art
[0002] In the existing technology, battery cells need to use insulating glue and solder paste to achieve insulation and welding. In stacked-grid batteries, the grid line is a continuous line segment from one side to the other. Because the welding ribbon and the grid line are very thin, there is an alignment offset problem between the welding ribbon and the grid line, which makes welding the welding ribbon and the grid line more difficult. Utility Model Content
[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the first object of the present invention is to provide a cell that can reduce the difficulty of producing the cell and enhance the photoelectric conversion efficiency of the cell.
[0004] The second object of the present invention is to provide a photovoltaic module, comprising the solar cell described in the above embodiment.
[0005] The third object of the present invention is to provide a photovoltaic power generation system, comprising the photovoltaic assembly described in the above embodiment.
[0006] According to the embodiment of the first aspect of the present invention, the battery cell includes: a battery cell body and a grid line, wherein the grid line is arranged on the battery cell body, the grid line includes a grid line body and at least one connecting grid line, the connecting grid line is connected to the grid line body, and the grid line body and the connecting grid line are arranged to intersect.
[0007] According to the solar cell of the embodiment of the present invention, the gate line includes a gate line body and at least one connecting gate line, and the gate line body and the connecting gate line are arranged to intersect. The arrangement of the connecting gate line can increase the gate line area, thereby reducing the difficulty of alignment when welding the conductive connector and the gate line, making the welding process easier and more reliable, reducing the production difficulty of the solar cell, and also enabling the gate line to more effectively collect the current generated on the surface of the solar cell body, thereby improving the photoelectric conversion efficiency of the solar cell.
[0008] In some embodiments, the connecting gate line is vertically connected to the gate line body.
[0009] In some embodiments, the connecting gate lines disposed on two adjacent gate lines are spaced apart from each other.
[0010] In some embodiments, the connecting gate lines arranged on two adjacent gate lines are arranged relative to each other along an extension direction perpendicular to the gate line body; and / or, the connecting gate lines arranged on two adjacent gate lines are staggered along an extension direction perpendicular to the gate line body.
[0011] In some embodiments, the connecting gate line includes a first gate line segment, one end of the first gate line segment is connected to the gate line body, and the other end of the first gate line segment extends in a direction away from the gate line body.
[0012] In some embodiments, the connecting gate line further includes: a second gate line segment, the second gate line segment and the first gate line segment are respectively arranged on both sides of the gate line body, one end of the second gate line segment is connected to one end of the first gate line segment, and the other end of the second gate line segment extends in a direction away from the first gate line segment.
[0013] In some embodiments, the length of the first gate line segment is L1, and L1 satisfies: 0<L1≤1mm; and / or the length of the second gate line segment is L2, and L2 satisfies: 0<L2≤1mm.
[0014] In some embodiments, there are a plurality of connecting gate lines, and the plurality of connecting gate lines are arranged at intervals along the extension direction of the gate line body.
[0015] In some embodiments, there are multiple gate lines, including positive gate lines and negative gate lines, and the positive gate lines and the negative gate lines are arranged in an alternating manner; there are multiple connecting gate lines, and the multiple connecting gate lines are respectively connected to the positive gate lines and the negative gate lines.
[0016] In some embodiments, the positive grid line includes multiple positive grid line segments, and the multiple positive grid line segments are arranged at intervals along the extension direction of the positive grid line segments; the negative grid line includes multiple negative grid line segments, and the multiple negative grid line segments are arranged at intervals along the extension direction of the negative grid line segments; and the multiple connecting grid lines are respectively connected to the positive grid line segments and the negative grid line segments.
[0017] In some embodiments, a first opening is formed between two adjacent positive grid line segments, and a second opening is formed between two adjacent negative grid line segments, and the first opening and the second opening are relatively arranged along an extension direction perpendicular to the positive grid line segment; and / or the first opening and the second opening are staggered along an extension direction perpendicular to the positive grid line segment.
[0018] The photovoltaic assembly according to the second embodiment of the present invention includes the solar cell according to the first embodiment of the present invention.
[0019] A photovoltaic power generation system according to an embodiment of the third aspect of the present invention includes a photovoltaic assembly according to an embodiment of the second aspect of the present invention.
[0020] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:
[0022] Figure 1 is a schematic diagram of a first embodiment of a battery cell according to an embodiment of the present utility model;
[0023] Figure 2 is a schematic diagram of a second embodiment of a battery cell according to an embodiment of the present utility model;
[0024] Figure 3 is a schematic diagram of a third embodiment of a battery cell according to an embodiment of the present utility model;
[0025] Figure 4 yes Figure 3 Enlarged schematic diagram of the middle P region;
[0026] Figure 5 is a schematic diagram of a fourth embodiment of a battery cell according to an embodiment of the present utility model;
[0027] Figure 6 yes Figure 5 Schematic enlargement of the mid-Q region.
[0028] Reference numerals:
[0029] 100. Battery cell;
[0030] 10. Battery body;
[0031] 20, gate line; 21, gate line body; 22, connecting gate line; 23, first gate line segment; 24, second gate line segment; 25, positive gate line; 251, positive gate line segment; 252, first opening; 26, negative gate line; 261, negative gate line segment; 262, second opening;
[0032] A. First direction; B. Second direction. DETAILED DESCRIPTION
[0033] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Figures 1-6 A cell 100 according to an embodiment of the present invention is described, including a cell body 10 and a gate line 20 . The cell 100 has a first direction A and a second direction B.
[0034] Specifically, if Figures 1-6As shown, the gate line 20 is provided on the battery cell body 10 , and the gate line 20 includes a gate line body 21 and at least one connecting gate line 22 . The connecting gate line 22 is connected to the gate line body 21 , and the gate line body 21 and the connecting gate line 22 are arranged to intersect.
[0035] Combine Figures 1-6 The grid line 20 is provided on at least one side of the cell body 10 along the thickness direction. The grid line 20 is used to collect current generated from the surface of the cell 100 and direct it to the external circuit. The connecting grid line 22 intersects and connects with the grid line body 21. The cell 100 also includes at least one conductive connector. The conductive connector extends along the first direction A of the cell 100. The conductive connector is provided on the side of the grid line 20 away from the cell body 10 along the thickness direction of the cell body 10. The conductive connector is suitable for welding to the grid line 20.
[0036] According to the battery cell 100 of the embodiment of the present invention, the gate line 20 includes a gate line body 21 and at least one connecting gate line 22, and the gate line body 21 and the connecting gate line 22 are arranged to intersect. The arrangement of the connecting gate line 22 can increase the area of the gate line 20, thereby reducing the difficulty of alignment when welding the conductive connector and the gate line 20, making the welding process easier and more reliable, reducing the production difficulty of the battery cell 100, and also enabling the gate line 20 to more effectively collect the current generated on the surface of the battery cell body 10, thereby improving the photoelectric conversion efficiency of the battery cell 100.
[0037] According to some embodiments of the present invention, Figures 1-6 As shown, the connecting grid lines 22 are perpendicularly connected to the grid line body 21. The grid line body 21 extends along the first direction A of the cell 100, and the connecting grid lines 22 extend along the second direction B of the cell 100. The connecting grid lines 22 and the grid line body 21 intersect perpendicularly, forming a "cross" structure. As a result, the provision of the connecting grid lines 22 can increase the area of the grid line 20 in the second direction B, thereby reducing the difficulty of aligning the conductive connector and the grid line 20 during welding, making the welding process easier and more reliable, and reducing the difficulty of manufacturing the cell 100.
[0038] According to some embodiments of the present invention, Figure 1-Figure 4 As shown, the connecting grid lines 22 provided on two adjacent grid lines 20 are spaced apart from each other. A plurality of grid lines 20 are formed on the cell body 10, and the plurality of grid lines 20 are evenly spaced along the second direction B of the cell body 10. Adjacent grid lines 20 have different polarities, and the connecting grid lines 22 provided on two adjacent grid lines 20 are spaced apart from each other in the second direction B of the cell body 10. Therefore, the spacing of the connecting grid lines 22 provided on two adjacent grid lines 20 helps avoid the risk of short circuits between the two adjacent grid lines 20, reduces the difficulty of welding the conductive connectors, and further improves the reliability of the cell 100.
[0039] According to some embodiments of the present invention, Figure 1 and Figure 2 As shown, the connecting grid lines 22 provided on two adjacent grid lines 20 are arranged relative to each other along an extension direction perpendicular to the grid line body 21, that is, the connecting grid lines 22 on the two adjacent grid lines 20 are located on the same straight line along the first direction A of the battery cell 100. Alternatively, the connecting grid lines 22 provided on two adjacent grid lines 20 are staggered along an extension direction perpendicular to the grid line body 21, that is, the connecting grid lines 22 on the two adjacent grid lines 20 are spaced apart along the first direction A of the battery cell 100. Alternatively, the connecting grid lines 22 provided on at least some of the adjacent two grid lines 20 on the battery cell 100 are arranged relative to each other along an extension direction perpendicular to the grid line body 21, and the connecting grid lines 22 provided on at least some of the adjacent two grid lines 20 on the battery cell 100 are staggered along an extension direction perpendicular to the grid line body 21.
[0040] Therefore, the relative or staggered arrangement of the connecting gate lines 22 on adjacent gate lines 20 helps to optimize the space utilization of the surface of the battery cell body 10, and when the connecting gate lines 22 set on two adjacent gate lines 20 are staggered along the extension direction perpendicular to the gate line body 21, the connecting gate lines 22 located at both ends of the gate line 20 along the first direction A can be longer in the first direction A than the connecting gate lines 22 located in the middle of the gate line 20, so as to increase the area of the gate line 20 and improve the photoelectric conversion efficiency of the battery cell 100.
[0041] According to some embodiments of the present invention, Figure 1 and Figure 2 As shown, the connecting grid line 22 includes a first grid line segment 23, one end of which is connected to the grid line body 21, and the other end of the first grid line segment 23 extends in a direction away from the grid line body 21. That is, the first grid line segment 23 extends along the second direction B of the solar cell 100, one end of the first grid line segment 23 along the second direction B is connected to the grid line body 21, and the other end of the first grid line segment 23 along the second direction B extends in a direction away from the grid line body 21. As a result, the first grid line segment 23 can increase the area of the grid line 20, improve the grid line 20's ability to collect current on the surface of the solar cell 100, and also increase the connection area between the grid line 20 and the conductive connector, reducing the difficulty of welding.
[0042] According to some embodiments of the present invention, Figure 1 and Figure 2 As shown, the connecting gate line 22 also includes: a second gate line segment 24, the second gate line segment 24 and the first gate line segment 23 are respectively arranged on both sides of the gate line body 21, one end of the second gate line segment 24 is connected to one end of the first gate line segment 23, and the other end of the second gate line segment 24 extends in a direction away from the first gate line segment 23.
[0043] The second gate line segment 24 extends along the second direction B of the battery cell 100, and the first gate line segment 23 and the second gate line segment 24 are respectively located on both sides of the gate line body 21 along the second direction B of the battery cell 100. The end of the first gate line segment 23 connected to the gate line body 21 along the second direction B is suitable for being connected to the end of the second gate line segment 24 connected to the gate line body 21 along the second direction B. The other end of the first gate line segment 23 along the second direction B and the other end of the second gate line segment 24 along the second direction B extend in a direction away from each other along the second direction B, that is, the first gate line segment 23 and the second gate line segment 24 are symmetrically distributed along the second direction B.
[0044] Therefore, the arrangement and position distribution of the first gate line segment 23 and the second gate line segment 24 can improve the reliability and stability of the connection between the conductive connector and the gate line 20 , thereby improving the overall structural strength and reliability of the cell 100 .
[0045] According to some embodiments of the present invention, Figure 1 As shown, the length of the first gate line segment 23 is L1, and L1 satisfies: 0<L1≤1mm; or, the length of the second gate line segment 24 is L2, and L2 satisfies: 0<L2≤1mm; or, the length of the first gate line segment 23 is L1, and the length of the second gate line segment 24 is L2, and L1 and L2 respectively satisfy: 0<L1≤1mm, 0<L2≤1mm. If the length of the first gate line segment 23 or the second gate line segment 24 is greater than 1mm, the length of the first gate line segment 23 or the second gate line segment 24 is too long, which may cause the first gate line segment 23 or the second gate line segment 24 to contact the adjacent gate line 20 and cause a short circuit.
[0046] Therefore, by limiting the length range of the first gate line segment 23 and the second gate line segment 24 , the current collection capability of the cell 100 can be enhanced, and the photoelectric conversion efficiency of the cell 100 can be improved while improving the reliability and stability of the cell 100 .
[0047] According to some embodiments of the present invention, Figure 1 As shown, there are multiple connecting grid lines 22, and the multiple connecting grid lines 22 are arranged at intervals along the extension direction of the grid line body 21. The multiple connecting grid lines 22 are arranged at equal intervals or unequal intervals along the first direction A. Therefore, the design of multiple connecting grid lines 22 can effectively increase the area of the grid line 20 and improve the ability of the grid line 20 to collect current. The multiple connecting grid lines 22 arranged at intervals along the first direction A of the battery cell 100 can also improve the connection strength between the grid line 20 and the conductive connector at different positions in the first direction A, thereby improving the overall reliability and stability of the battery cell 100.
[0048] According to some embodiments of the present invention, Figures 1-6As shown, there are multiple grid lines 20, including positive grid lines 25 and negative grid lines 26, which are arranged in an alternating manner. There are multiple connecting grid lines 22, and the multiple connecting grid lines 22 are respectively connected to the positive grid lines 25 and the negative grid lines 26. Along the first direction A of the battery cell 100, the multiple grid lines 20 are evenly spaced, and the positive grid lines 25 and the negative grid lines 26 are alternately spaced. Each positive grid line 25 is provided with multiple connecting grid lines 22, and each negative grid line 26 is provided with multiple connecting grid lines 22. Therefore, the staggered arrangement of the positive grid lines 25 and the negative grid lines 26 helps to further optimize current collection, improve the uniformity of current collection, and reduce internal resistance and energy loss.
[0049] According to some embodiments of the present invention, Figure 3-Figure 6 As shown, the positive grid line 25 includes a plurality of positive grid line segments 251, and the plurality of positive grid line segments 251 are arranged at intervals along the extension direction of the positive grid line segments 251; the negative grid line 26 includes a plurality of negative grid line segments 261, and the plurality of negative grid line segments 261 are arranged at intervals along the extension direction of the negative grid line segments 261; and the plurality of connecting grid lines 22 are respectively connected to the positive grid line segments 251 and the negative grid line segments 261.
[0050] The positive gridline segments 251 extend along the first direction A of the cell 100, with multiple positive gridline segments 251 spaced apart along the first direction A of the cell 100, and multiple positive gridline segments 251 face each other along the first direction A of the cell 100. The negative gridline segments 261 extend along the first direction A of the cell 100, with multiple negative gridline segments 261 spaced apart along the first direction A of the cell 100, and multiple negative gridline segments 261 face each other along the first direction A of the cell 100. Thus, the spacing of the positive and negative gridline segments 251 and 261 along their respective extension directions helps reduce the light-shielding area, improves photoelectric conversion efficiency, and facilitates more uniform current distribution across the entire cell 100.
[0051] According to some embodiments of the present invention, Figure 3-Figure 6As shown, a first opening 252 is formed between two adjacent positive grid segments 251, and a second opening 262 is formed between two adjacent negative grid segments 261. The first opening 252 and the second opening 262 are arranged relative to each other along an extension direction perpendicular to the positive grid segments 251, that is, the first opening 252 and the second opening 262 are arranged relative to each other along the second direction B of the battery cell 100; or, the first opening 252 and the second opening 262 are staggered along the extension direction perpendicular to the positive grid segments 251, that is, the first opening 252 and the second opening 262 are staggered along the second direction B of the battery cell 100; or, the first opening 252 formed between at least some of the adjacent two positive grid segments 251 on the battery cell 100 is arranged relative to the second opening 262 formed between at least some of the adjacent two negative grid segments 261, and the first opening 252 formed between at least some of the adjacent two positive grid segments 251 is staggered with the second opening 262 formed between at least some of the adjacent two negative grid segments 261.
[0052] Therefore, the relative or staggered arrangement of the first opening 252 and the second opening 262 helps to further optimize the current collection path, improve the photoelectric conversion efficiency, and optimize the utilization space of the battery cell 100 surface, which helps to distribute the current more evenly across the entire battery cell 100 .
[0053] The photovoltaic assembly according to the second embodiment of the present invention includes the solar cell 100 according to the first embodiment of the present invention.
[0054] The photovoltaic module according to the embodiment of the present invention can effectively enhance the reliability and stability of the overall structure of the photovoltaic module by applying the cell 100 described in the above embodiment, improve the photoelectric conversion efficiency of the photovoltaic module, simplify the manufacturing process of the photovoltaic module, and help improve the overall performance of the photovoltaic module.
[0055] A photovoltaic power generation system according to an embodiment of the third aspect of the present invention includes a photovoltaic assembly according to an embodiment of the second aspect of the present invention.
[0056] The photovoltaic power generation system according to the embodiment of the present invention, by applying the photovoltaic components in the above embodiment, helps to improve the overall power generation efficiency of the photovoltaic power generation system, reduce the production cost of the photovoltaic power generation system, and enhance the reliability of the photovoltaic power generation system.
[0057] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.
[0058] In the description of the present invention, "first feature" and "second feature" may include one or more of the features. In the description of the present invention, "plurality" means two or more. In the description of the present invention, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may also include the first and second features not being in direct contact but being in contact via another feature between them. In the description of the present invention, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.
[0059] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.
[0060] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.
Claims
1. A battery cell, characterized in that: include: Battery cell body; The gate line is arranged on the battery cell body, and the gate line includes a gate line body and at least one connecting gate line, the connecting gate line is connected to the gate line body, and the gate line body and the connecting gate line are arranged to intersect.
2. The battery cell according to claim 1, wherein: The connecting gate line is vertically connected to the gate line body.
3. The battery cell according to claim 1, wherein: The connecting gate lines arranged on two adjacent gate lines are spaced apart from each other.
4. The battery cell according to claim 3, characterized in that: The connecting grid lines arranged on two adjacent grid lines are arranged opposite to each other along an extension direction perpendicular to the grid line body; and / or, The connecting gate lines arranged on two adjacent gate lines are staggered along an extension direction perpendicular to the gate line body.
5. The battery cell according to claim 1, characterized in that: The connecting grid lines include: A first gate line segment, one end of which is connected to the gate line body, and the other end of which extends in a direction away from the gate line body.
6. The battery cell according to claim 5, characterized in that: The connecting grid line further includes: The second gate line segment and the first gate line segment are respectively arranged on both sides of the gate line body, one end of the second gate line segment is connected to one end of the first gate line segment, and the other end of the second gate line segment extends in a direction away from the first gate line segment.
7. The battery cell according to claim 6, characterized in that: The length of the first gate line segment is L1, and L1 satisfies: 0<L1≤1mm; and / or, The length of the second gate line segment is L2, and L2 satisfies: 0<L2≤1mm.
8. The battery cell according to claim 1, wherein: There are a plurality of connecting gate lines, and the plurality of connecting gate lines are arranged at intervals along the extending direction of the gate line body.
9. The battery cell according to any one of claims 1 to 8, characterized in that: There are a plurality of gate lines, the plurality of gate lines include positive gate lines and negative gate lines, and the positive gate lines and the negative gate lines are arranged in a staggered manner; There are a plurality of connecting grid lines, and the plurality of connecting grid lines are respectively connected to the positive grid line and the negative grid line.
10. The battery cell according to claim 9, characterized in that: The positive electrode grid line includes a plurality of positive electrode grid line segments, and the plurality of positive electrode grid line segments are arranged at intervals along the extension direction of the positive electrode grid line segments; The negative electrode grid line includes a plurality of negative electrode grid line segments, and the plurality of negative electrode grid line segments are arranged at intervals along the extension direction of the negative electrode grid line segments; The plurality of connecting grid lines are respectively connected to the positive grid line segment and the negative grid line segment.
11. The battery cell according to claim 10, characterized in that: A first opening is formed between two adjacent positive grid line segments, and a second opening is formed between two adjacent negative grid line segments. The first opening and the second opening are arranged opposite to each other along a direction perpendicular to the extension direction of the positive grid line segment; and / or, The first opening and the second opening are staggered along an extension direction perpendicular to the positive grid line segment.
12. A photovoltaic module, characterized in that: The invention comprises a battery cell according to any one of claims 1 to 11.
13. A photovoltaic power generation system, characterized in that: The photovoltaic module according to claim 12 is included.