Battery piece, battery string, photovoltaic module and photovoltaic power generation system

Abstract

The utility model discloses a battery piece, a battery string with the same, a photovoltaic module and a photovoltaic power generation system. The battery piece comprises a battery piece body, a plurality of first grid lines, a plurality of second grid lines, a first collection grid line, a second collection grid line and a connection grid line. Through the arrangement of the connecting grid lines, electric connection between the multiple second grid lines close to the first edge grid lines and electric connection between the multiple first grid lines close to the second edge grid lines can be achieved, and collection of currents on the first grid lines and the second grid lines is guaranteed; and the collection grid lines and the edge grid lines are arranged to ensure the reliable output and collection of the current and the utilization rate of the current on the battery piece, so that the arrangement of insulation paste can be avoided, the structure of the battery piece can be simplified, the processing efficiency of the battery piece can be improved, and the cost of the battery piece can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaics, in particular to a battery sheet, a battery string, a photovoltaic component and a photovoltaic power generation system. Background Art

[0002] In the prior art, the connection between the welding strip and the fine grid line in the back contact battery needs to be arranged with insulating glue to avoid connection with the grid line of different polarity, that is, when the welding strip is connected to the positive grid line, it is necessary to overcome the contact between the negative grid line and the welding strip, which increases the arrangement of insulating glue. In addition, the reliability of the connection between the welding strip and the fine grid line is low, and the structure of the back contact battery is relatively complicated. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a battery cell, which has a simpler structure for electrical connection between each grid line and the welding strip, thereby improving the processing efficiency of the battery cell.

[0004] The second objective of the present invention is to provide a battery string, comprising the battery cells described in the above embodiment.

[0005] The third object of the present utility model is to provide a photovoltaic assembly, comprising the battery sheet or battery string described in the above embodiment.

[0006] The fourth objective of the present invention is to provide a photovoltaic power generation system, comprising the battery cell or battery string or photovoltaic module described in the above embodiments.

[0007] According to the first aspect of the utility model, the battery cell comprises: a battery cell body, a plurality of first grid lines, a plurality of second grid lines, a first collecting grid line, a second collecting grid line and a connecting grid line. The plurality of first grid lines and the plurality of second grid lines are alternately arranged in the battery cell body, each of the first grid lines comprises a plurality of first grid line segments, two adjacent first grid line segments are spaced apart from each other to define a first opening, each of the second grid lines comprises a plurality of second grid line segments, two adjacent second grid line segments are spaced apart from each other to define a second opening, the first grid lines and the second grid lines have different polarities, at least one of the plurality of first grid lines located at the edge of the battery cell body is a first edge grid line, and at least one of the plurality of second grid lines located at the edge of the battery cell body is a second edge grid line.

[0008] The first collecting gate line and the second collecting gate line are respectively arranged at the two ends of the plurality of first gate lines and the plurality of second gate lines, the first collecting gate line is connected to the ends of the plurality of first gate lines, the second collecting gate line is connected to the ends of the plurality of second gate lines, the first edge gate line is continuous at the first opening of the first collecting gate line adjacent to the remaining first gate lines, and the second edge gate line is continuous at the second opening of the second collecting gate line adjacent to the remaining second gate lines.

[0009] The connecting gate lines include at least one first connecting gate line and at least one second connecting gate line, wherein the first connecting gate line is connected between the first gate line adjacent to the second edge gate line and at least one remaining first gate line, and the second connecting gate line is connected between the second gate line adjacent to the first edge gate line and at least one remaining second gate line.

[0010] According to the battery cell of the embodiment of the utility model, the first collecting gate line and the second collecting gate line are respectively arranged at the two ends of the plurality of the first gate lines and the plurality of the second gate lines, and the connecting gate lines are arranged to enable electrical connection between the plurality of the second gate lines close to the first edge gate lines, and electrical connection between the plurality of the first gate lines close to the second edge gate lines, thereby ensuring the collection of current on each first gate line and each second gate line. By arranging the collecting gate lines and the edge gate lines to ensure the reliable output and collection of current and the utilization rate of the current on the battery cell, the arrangement of insulating glue can be avoided, the battery cell structure can be simplified, the processing efficiency of the battery cell can be improved, and the cost of the battery cell can be effectively reduced.

[0011] In some embodiments, the first connecting gate line is located at the second opening, and the second connecting gate line is located at the first opening.

[0012] In some embodiments, the first gate line adjacent to the second edge gate line is disconnected at the second opening adjacent to the second collecting gate line to form two adjacent first gate line segments, and there are two first connecting gate lines, and the two first connecting gate lines are respectively connected between the two adjacent first gate line segments and at least one remaining first gate line; the second gate line adjacent to the first edge gate line is disconnected at the first opening adjacent to the first collecting gate line to form two adjacent second gate line segments, and there are two second connecting gate lines, and the two second connecting gate lines are respectively connected between the two adjacent second gate line segments and at least one remaining second gate line.

[0013] In some embodiments, the distance between the two first connecting gate lines gradually decreases along a direction away from the second edge gate line; and the distance between the two second connecting gate lines gradually decreases along a direction away from the first edge gate line.

[0014] In some embodiments, along a direction away from the second edge gate line, the two first connection gate lines extend obliquely toward each other; along a direction away from the first edge gate line, the two second connection gate lines extend obliquely toward each other.

[0015] In some embodiments, the first connecting gate line is connected between the first gate line adjacent to the second edge gate line and a plurality of adjacent first gate lines; the second connecting gate line is connected between the second gate line adjacent to the first edge gate line and a plurality of adjacent second gate lines.

[0016] In some embodiments, the first connecting gate line is perpendicular to the first gate line; and the second connecting gate line is perpendicular to the second gate line.

[0017] In some embodiments, at least one of the remaining first gate lines has a first thickened segment, the first thickened segment is located at the second opening of the first gate line adjacent to the second collecting gate line, and the first connecting gate line is connected between the first gate line adjacent to the second edge gate line and the first thickened segment; at least one of the remaining second gate lines has a second thickened segment, the second thickened segment is located at the first opening of the second gate line adjacent to the first collecting gate line, and the second connecting gate line is connected between the second gate line adjacent to the first edge gate line and the second thickened segment.

[0018] In some embodiments, the width of the second opening of the first edge gate line at least located at the first collection gate line and adjacent to the first collection gate line is greater than the width of the rest of the first edge gate line; the width of the first opening of the second edge gate line at least located at the second collection gate line and adjacent to the second collection gate line is greater than the width of the rest of the second edge gate line.

[0019] In some embodiments, the distance between the center of the second opening adjacent to the first collecting grid line and the corresponding side of the battery cell body is a, and the distance between the center of the second opening adjacent to the first collecting grid line and the center of the adjacent first opening is b, wherein a and b satisfy: a+b≤12mm, or 0.04≤a / b≤1.

[0020] In some embodiments, a and b respectively satisfy: 0.5mm≤a≤6mm, 6mm≤b≤11.5mm.

[0021] The battery string according to the second aspect of the present invention comprises: a plurality of battery cells and a plurality of interconnection structures, wherein the battery cells are battery cells according to the first aspect of the present invention; and the plurality of battery cells are connected by the plurality of interconnection structures.

[0022] In some embodiments, the plurality of interconnecting structures include: a plurality of first interconnecting structures and a plurality of second interconnecting structures, wherein the plurality of first interconnecting structures are respectively connected to the plurality of first grid lines of the battery cell, the first interconnecting structure adjacent to the edge of the battery cell is a first edge interconnecting structure, and one end of the first edge interconnecting structure adjacent to the edge of the battery cell is located on a side of the first grid line adjacent to the second edge grid line of the battery cell away from the second edge grid line; the plurality of second interconnecting structures are respectively connected to the plurality of second grid lines of the battery cell, the second edge interconnecting structure adjacent to the edge of the battery cell is a second edge interconnecting structure, and one end of the second edge interconnecting structure adjacent to the edge of the battery cell is located on a side of the second grid line adjacent to the first edge grid line of the battery cell away from the first edge grid line.

[0023] In some embodiments, the method further comprises: a plurality of first adhesive members, wherein the first adhesive members are arranged on a side of the interconnection structure away from the battery cell, and the plurality of first adhesive members are arranged at intervals along the length direction of the interconnection structure.

[0024] In some embodiments, it further includes: a plurality of second adhesive members, the plurality of second adhesive members include a first sub-adhesive member and a second sub-adhesive member, the first sub-adhesive member is arranged between the first interconnecting structure member and the battery cell, the first sub-adhesive member is located at the second opening, the second sub-adhesive member is arranged between the second interconnecting structure member and the battery cell, and the second sub-adhesive member is located at the first opening.

[0025] In some embodiments, it further includes: multiple first gate line connecting lines and multiple second gate line connecting lines, along the length direction of the first interconnection structure, the multiple first gate line connecting lines are respectively connected between two adjacent first gate lines on both sides of the first sub-adhesive member; along the length direction of the second interconnection structure, the multiple second gate line connecting lines are respectively connected between two adjacent second gate lines on both sides of the second sub-adhesive member.

[0026] The photovoltaic assembly according to the third aspect of the present invention comprises the battery cell according to the first aspect of the present invention, or the battery string according to the second aspect of the present invention.

[0027] The photovoltaic power generation system according to the fourth aspect of the utility model comprises the battery cell according to the first aspect of the utility model, or the battery string according to the second aspect of the utility model, or the photovoltaic module according to the third aspect of the utility model.

[0028] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0030] Figure 1 It is a schematic diagram of a photovoltaic assembly according to an embodiment of the utility model.

[0031] Figure 2 yes Figure 1 An enlarged schematic diagram of the P region in the figure.

[0032] Figure 3 yes Figure 1 Another enlarged schematic diagram of the P region in the middle.

[0033] Figure 4 yes Figure 1 Schematic enlargement of the mid-Q region.

[0034] Figure 5 It is a schematic diagram of a photovoltaic assembly according to another embodiment of the utility model.

[0035] Figure 6 yes Figure 5 Schematic diagram of the enlarged M region.

[0036] Figure 7 yes Figure 5 Enlarged schematic diagram of the middle N region.

[0037] Figure 8 is a schematic diagram of a photovoltaic assembly according to another embodiment of the utility model.

[0038] Fig. 9 yes Figure 8 An enlarged schematic diagram of an embodiment of the R region.

[0039] Fig.10 yes Figure 8 An enlarged schematic diagram of another embodiment of the middle R region.

[0040] Reference numerals:

[0041] 100. Battery cell;

[0042] 10. Cell body; 11. First grid line; 111. First grid line segment; 112. First opening; 113. First thickened segment; 12. Second grid line; 121. Second grid line segment; 122. Second opening; 123. Second thickened segment;

[0043] 20. First collecting grid line; 21. Second collecting grid line;

[0044] 30. a first connecting grid line; 31. a second connecting grid line;

[0045] 40, first edge gate line; 401, first sub-edge gate line segment; 402, second sub-edge gate line segment; 41, second edge gate line; 411, third sub-edge gate line segment; 412, fourth sub-edge gate line segment;

[0046] 200, battery string;

[0047] 50. Interconnection structure; 501. First interconnection structure; 502. Second interconnection structure;

[0048] 60, first adhesive member; 62, second adhesive member; 622, first sub-adhesive member; 623, second sub-adhesive member;

[0049] 70. a first gate line connection line; 71. a second gate line connection line;

[0050] A. First direction; B. Second direction. DETAILED DESCRIPTION

[0051] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Figure 1-Figure 10 A cell 100 according to an embodiment of the present invention is described. The cell 100 includes a cell body 10, a plurality of first grid lines 11, a plurality of second grid lines 12, a first collecting grid line 20, a second collecting grid line 21 and connecting grid lines.

[0052] Specifically, if Figure 1-Figure 7As shown, a plurality of first grid lines 11 and a plurality of second grid lines 12 are alternately arranged in the battery cell body 10, each first grid line 11 includes a plurality of first grid line segments 111, and two adjacent first grid line segments 111 are spaced apart from each other to define a first opening 112, each second grid line 12 includes a plurality of second grid line segments 121, and two adjacent second grid line segments 121 are spaced apart from each other to define a second opening 122, and the polarities of the first grid lines 11 and the second grid lines 12 are different. For example, a plurality of first grid lines 11 and a plurality of second grid lines 12 are provided on at least one side in the thickness direction of the battery cell body 10, and the plurality of first grid lines 11 and the second grid lines 12 extend along the first direction A and are alternately arranged along the second direction B. The first gate line 11 includes a plurality of first gate line segments 111 arranged at intervals along the first direction A, and a first opening 112 is defined between two adjacent first gate line segments 111. The second gate line 12 includes a plurality of second gate line segments 121 arranged at intervals along the first direction A, and a second opening 122 is defined between two adjacent second gate line segments 121. The first opening 112 and the second opening 122 are staggered along the second direction B. That is, the first opening 112 is opposite to the second gate line segment 121 along the second direction B, and the second opening 122 is opposite to the first gate line segment 111 along the second direction B. Among them, one of the first gate line 11 and the second gate line 12 is a positive gate line, and the other of the first gate line 11 and the second gate line 12 is a negative gate line. The first direction A is perpendicular to the second direction B.

[0053] At least one of the plurality of first gate lines 11 located at the edge of the battery cell body 10 is a first edge gate line 40, and at least one of the plurality of second gate lines 12 located at the edge of the battery cell body 10 is a second edge gate line 41. In this embodiment, the first edge gate line 40 and the second edge gate line 41 are respectively arranged on both sides of the remaining first gate lines 11 and the second gate lines 12 along the second direction B, that is, the first edge gate line 40 and the second edge gate line 41 are respectively arranged on both side edges of the battery cell body 10 along the second direction B.

[0054] The first collecting gate line 20 and the second collecting gate line 21 are respectively arranged at both ends of the plurality of first gate lines 11 and the plurality of second gate lines 12. In the present embodiment, the first collecting gate line 20 and the second collecting gate line 21 are respectively arranged at both side edges of the battery cell body 10 along the first direction A. The first collecting gate line 20 is electrically connected to the first edge gate line 40, and the second collecting gate line 21 is electrically connected to the second edge gate line 41. The first collecting gate line 20 is connected to the ends of the plurality of first gate lines 11, and the second collecting gate line 21 is connected to the ends of the plurality of second gate lines 12. The first edge gate line 40 is continuous at the first opening 112 adjacent to the first collecting gate line 20 corresponding to the remaining first gate lines 11, and the second edge gate line 41 is continuous at the second opening 122 adjacent to the second collecting gate line 21 corresponding to the remaining second gate lines 12. Here, the first edge gate line 40 is taken as an example. The first edge gate line 40 is arranged uninterruptedly. The first edge gate line 40 is opposite to the first openings 112 arranged on the other multiple first gate lines 11 along the second direction B, that is, the first edge gate line 40 is continuous at the position corresponding to the first opening 112 along the second direction B, so that the first edge gate line 40 can be electrically connected to the first collection gate line 20 to realize the collection of current on the first collection gate line 20 at at least one end of the battery cell body 10 along the second direction B.

[0055] Combination Figure 2-Figure 4 , the connecting gate lines include at least one first connecting gate line 30 and at least one second connecting gate line 31, the first connecting gate line 30 is connected between the first gate line 11 adjacent to the second edge gate line 41 and at least one of the remaining first gate lines 11, and the second connecting gate line 31 is connected between the second gate line 12 adjacent to the first edge gate line 40 and at least one of the remaining second gate lines 12. In this embodiment, taking the second connecting gate line 31 as an example, one end of the second connecting gate line 31 is connected to the second gate line 12 adjacent to the first edge gate line 40, and the other end of the second connecting gate line 31 is connected to at least one of the remaining second gate lines 12. That is, the second connecting gate line 31 is connected to at least two second gate lines 12, or three second gate lines 12, or more near the first edge gate line 40 along the second direction B, which will not be described in detail here.

[0056] According to the battery cell 100 of the embodiment of the utility model, the connection grid lines are arranged to enable electrical connection between multiple second grid lines 12 close to the first edge grid line 40, and electrical connection between multiple first grid lines 11 close to the second edge grid line 41, thereby ensuring the collection of current on each first grid line 11 and each second grid line 12. By arranging the collecting grid lines and the edge grid lines to ensure the reliable output and collection of current and the utilization rate of the current on the battery cell 100, the arrangement of insulating glue can be avoided, the structure of the battery cell 100 can be simplified, the processing efficiency of the battery cell 100 can be improved, and the cost of the battery cell 100 can be effectively reduced.

[0057] According to some embodiments of the present invention, Figure 2 and Figure 4 As shown, the first connecting gate line 30 is located at the second opening 122 , and the second connecting gate line 31 is located at the first opening 112 .

[0058] That is, multiple first gate lines 11 and multiple second gate lines 12 are arranged alternately at intervals, one end of the first connecting gate line 30 is connected to the first gate line 11 adjacent to the second edge gate line 41, the other end of the first connecting gate line 30 is connected to at least one remaining first gate line 11, and is located between two adjacent second gate line segments 121, that is, at the second opening 122, one end of the second connecting gate line 31 is connected to the second gate line 12 adjacent to the first edge gate line 40, the other end of the second connecting gate line 31 is connected to at least one remaining second gate line 12, and is located at the first opening 112 between two adjacent first gate line segments 111.

[0059] Therefore, if the first connecting gate line 30 is connected to the second gate line 12, or the second connecting gate line 31 is connected to the first gate line 11, a short circuit will be caused because the current on the first gate line 11 and the current on the second gate line 12 have opposite polarities. By setting the first opening 112 and the second opening 122, the first connecting gate line 30 can be accurately connected to the first gate line 11, and the second connecting gate line 31 can be accurately connected to the second gate line 12. At the same time, the first connecting gate line 30 is prevented from being connected to the adjacent second gate line 12, and the second connecting gate line 31 is prevented from being connected to the adjacent first gate line 11, thereby improving the safety of the battery cell 100.

[0060] According to some embodiments of the present invention, Figure 2 and Figure 4 As shown, the first gate line 11 adjacent to the second edge gate line 41 is disconnected at the second opening 122 adjacent to the second collection gate line 21 to form two adjacent first gate line segments 111, there are two first connecting gate lines 30, and the two first connecting gate lines 30 are respectively connected between the two adjacent first gate line segments 111 and at least one remaining first gate line 11; the second gate line 12 adjacent to the first edge gate line 40 is disconnected at the first opening 112 adjacent to the first collection gate line 20 to form two adjacent second gate line segments 121, there are two second connecting gate lines 31, and the two second connecting gate lines 31 are respectively connected between the two adjacent second gate line segments 121 and at least one remaining second gate line 12.

[0061] In view of the fact that the first connection grid line 30 and the second connection grid line 31 are arranged in this embodiment, except for the different positions, the structure and principle of the connection are the same. In this embodiment, the arrangement of the second connection grid line 31 is taken as an example. The second grid line 12 adjacent to the first edge grid line 40 is disconnected to form two second grid line segments 121, and one end of the two second grid line segments 121 adjacent to each other is respectively connected to a second connection grid line 31, that is, one end of the two second connection grid lines 31 is respectively connected to the two second grid line segments 121 of the second grid line 12 close to the edge of the battery cell body 10, and the other ends of the two second connection grid lines 31 extend in a direction away from the first edge grid line 40 and are connected to at least one of the remaining second grid lines 12. Thereby, the electrical connection between the multiple second grid lines 12 adjacent to the edge of the battery cell body 10 is realized.

[0062] Therefore, the setting and connection position of the first connecting gate line 30 and the second connecting gate line 31 can facilitate the connection of multiple adjacent first gate lines 11 or second gate lines 12, so that multiple first gate lines 11 close to the edge are electrically connected, and multiple second gate lines 12 are electrically connected, ensuring the collection of current on multiple gate lines. At the same time, it is convenient to reduce the requirements for the welding strip when setting it, avoiding the contact between the welding strip that collects the current of the first gate line 11 and the second gate line 12, and similarly avoiding the contact between the welding strip that collects the current of the second gate line 12 and the first gate line 11.

[0063] Combination Figure 3 Taking the second connection gate line 31 as an example, when the second connection gate line 31 is connected to a plurality of second gate lines 12, at least one second gate line 12 is opposite to the first opening 112 along the second direction B, that is, at least one of the plurality of second gate lines 12 connected to the second connection gate line 31 is thickened at a position opposite to the first opening 112 to facilitate the connection between two adjacent second connection gate lines 31. The other second gate lines 12 connected to the second connection gate line 31 are cut off at the second connection gate line 31, and the current on the plurality of second gate lines 12 is collected through the uncut second gate lines 12 and the second connection gate line 31.

[0064] According to some embodiments of the present invention, Figure 1-Figure 4 As shown, along the direction away from the second edge gate line 41, that is, along the second direction B towards the first edge gate line 40, the distance between the two first connecting gate lines 30 gradually decreases; along the direction away from the first edge gate line 40, that is, along the second direction B towards the second edge gate line 41, the distance between the two second connecting gate lines 31 gradually decreases.

[0065] Thus, the distance between the two second connecting gate lines 31 along the second direction B from the first edge gate line 40 toward the first gate line 11 adjacent thereto gradually decreases, and the distance between the two first connecting gate lines 30 along the second direction B toward the direction away from the second edge gate line 41 gradually decreases, which can facilitate the arrangement of the first connecting gate line 30 and the second connecting gate line 31, further avoid contact between the first connecting gate line 30 and the other second gate lines 12 and between the second connecting gate line 31 and the other first gate lines 11, and can increase the connection area when the welding strip is connected to the corresponding gate line, thereby increasing the reliability of the connection.

[0066] Furthermore, if Figure 2 and Figure 4 As shown, along the direction away from the second edge grid line 41, the two first connection grid lines 30 extend obliquely toward the direction close to each other; along the direction away from the first edge grid line 40, the two second connection grid lines 31 extend obliquely toward the direction close to each other. For the two first connection grid lines 30, the ends of the two first connection grid lines 30 away from the second edge grid line 41 extend obliquely toward each other, so that the distance between the two first connection grid lines 30 is gradually reduced, and for the two second connection grid lines 31, the ends of the two second connection grid lines 31 away from the first edge grid line 40 extend obliquely toward each other, so that the distance between the two second connection grid lines 31 is gradually reduced.

[0067] That is, at the second opening 122 of the second gate line 12 adjacent to the first edge gate line 40, two second connecting gate lines 31 are formed along the direction away from the first edge gate line 40, and the two second connecting gate lines 31 extend obliquely toward each other; at the first opening 112 of the first gate line 11 adjacent to the second edge gate line 41, two first connecting gate lines 30 are formed along the direction away from the second edge gate line 41, and the two first connecting gate lines 30 extend obliquely toward each other.

[0068] Thus, the two first connecting gate lines 30 and the two second connecting gate lines 31 are tilted toward each other in the direction of the corresponding edge gate lines, which facilitates the arrangement of the first connecting gate lines 30 and the second connecting gate lines 31, improves their production efficiency, avoids the formation of short circuits, improves the safety of the battery cell 100, and extends the service life of the battery cell 100.

[0069] According to some embodiments of the present invention, Figure 2 and Figure 4 As shown, the first connecting gate line 30 is connected between the first gate line 11 adjacent to the second edge gate line 41 and the adjacent plurality of first gate lines 11 ; the second connecting gate line 31 is connected between the second gate line 12 adjacent to the first edge gate line 40 and the adjacent plurality of second gate lines 12 .

[0070] That is, one end of the two second connection grid lines 31 is respectively connected to one end of two second grid line segments 121 adjacent to the first edge grid line 40 and defining the second opening 122, and the second connection grid lines 31 are located at the first opening 112 and are spaced apart from the two first grid line segments 111 defining the first opening 112. Due to the arrangement of the second connection grid lines 31, when the second connection grid lines 31 are welded to the welding strip, the length of the welding strip in the second direction B can be reduced, thereby avoiding the situation where the welding strip contacts the first edge grid line 40 and causes a short circuit.

[0071] Thus, the two first connecting grid lines 30 and the two second connecting grid lines 31 are respectively connected between the multiple first grid lines 11 and the second grid lines 12 to form a harpoon shape, so as to increase the distance between the welding strip and the second edge grid line 41 and the first edge grid line 40 at the corresponding ends in the second direction B, so as to avoid the end of the welding strip being connected to the second edge grid line 41 or the first edge grid line 40 with different polarities to cause a short circuit, thereby reducing the processing accuracy of the welding strip and improving the safety of the battery cell 100 to ensure the safety of relevant personnel.

[0072] According to some embodiments of the present invention, Figure 5-Figure 7 As shown, the first connecting gate line 30 is perpendicular to the first gate line 11 ; and the second connecting gate line 31 is perpendicular to the second gate line 12 .

[0073] That is, a plurality of first connecting grid lines 30 are respectively arranged between a plurality of adjacent first grid lines 11, the plurality of first connecting grid lines 30 are perpendicular to the plurality of first grid lines 11, and are located at the second openings 122 of the plurality of second grid lines 12 without contacting the adjacent second grid lines 12; a plurality of second connecting grid lines 31 are respectively arranged between a plurality of adjacent second grid lines 12, the plurality of second connecting grid lines 31 are perpendicular to the plurality of second grid lines 12, and are located at the first openings 112 of the plurality of first grid lines 11. That is, at least one second connecting grid line 31 is arranged perpendicular to the plurality of second grid lines 12, and the second connecting grid line 31 at least connects two adjacent second grid lines 12. When the welding strip is welded to the plurality of second grid lines 12 at the first opening 112, the welding strip can collect the current on the second grid lines 12 at the edge without contacting the second grid lines 12 adjacent to the first edge grid lines 40, thereby reducing the requirements for the manufacturing precision of the welding strip and achieving a better current collection effect.

[0074] According to some embodiments of the present invention, Figure 6 and Figure 7As shown, at least one of the remaining first gate lines 11 has a first thickened section 113, which is located at the second opening 122 of the first gate line 11 adjacent to the second collection gate line 21, and the first thickened section 113 of the first gate line 11 is opposite to the second opening 122 along the second direction B, and the first connecting gate line 30 is connected between the first gate line 11 adjacent to the second edge gate line 41 and the first thickened section 113. At least one of the remaining second gate lines 12 has a second thickened section 123, which is located at the first opening 112 of the second gate line 12 adjacent to the first collection gate line 20, and the second thickened section 123 of the second gate line 12 is opposite to the first opening 112 along the second direction B. The second connecting gate line 31 is connected between the second gate line 12 adjacent to the first edge gate line 40 and the second thickened section 123.

[0075] That is, at least one first thickened section 113 is located at the second opening 122 of the first grid line 11 adjacent to the second collecting grid line 21; at least one second thickened section 123 is located at the first opening 112 of the second grid line 12 adjacent to the first collecting grid line 20. One end of the second connecting grid line 31 is connected to the second grid line 12 adjacent to the first edge grid line 40, and the other end of the second connecting grid line 31 is connected to at least one of the other multiple second grid lines 12 except the second grid line 12 adjacent to the first edge grid line 40, and the end of the second connecting grid line 31 away from the first edge grid line 40 is connected to the second thickened section 123 of the second grid line 12. Therefore, the first grid line 11 and the second grid line 12 are provided with thickened sections, so that the grid lines can increase the contact area with the welding strip when connected to the welding strip, increase the strength of the connection between the welding strip and the grid lines, and effectively prevent the welding strip from shifting during the lamination process to cause a short circuit, thereby improving the quality of the battery cell 100.

[0076] The cross-sectional shape of the first thickened section 113 and the second thickened section 123 is a polygon or a circle. When the cross-sectional shape of the first thickened section 113 and the second thickened section 123 is a polygon, the polygon may be a rectangle, a rhombus, or a triangle. In this embodiment, the cross-sectional shape of the thickened section is not specifically limited and may be any polygon.

[0077] According to some embodiments of the present invention, Figure 6 and Figure 7 As shown, the width of the second opening 122 of the first edge gate line 40, at least located at the first collection gate line 20 and adjacent to the first collection gate line 20, is greater than the width of the rest of the first edge gate line 40; the width of the first opening 112 of the second edge gate line 41, at least located at the second collection gate line 21 and adjacent to the second collection gate line 21, is greater than the width of the rest of the second edge gate line 41.

[0078] In the present embodiment, the first edge grid line 40 may include a first sub-edge grid line segment 401 and a second sub-edge grid line segment 402, wherein one end of the first sub-edge grid line segment 401 is connected to the first collection grid line 20, and the other end of the first sub-edge grid line segment 401 is connected to the second sub-edge grid line segment 402, and the cross-sectional area of ​​the first sub-edge grid line segment 401 is greater than the cross-sectional area of ​​the second sub-edge grid line. The length of the first sub-edge grid line along the first direction A is at least equal to the distance between the first collection grid line 20 connected thereto and the second opening 122 adjacent to the first collection grid line 20. That is, the first sub-edge grid line can connect the first collection grid line 20 and the adjacent welding strip for connecting the first grid line 11. Similarly, the second edge grid line 41 may also include two sub-edge grid line segments with different cross-sectional areas, wherein the sub-edge grid line segment with a larger cross-sectional area is connected to the second collection grid line 21.

[0079] Therefore, by thickening the first edge gate line 40 connected to the first collecting gate line 20 and the second edge gate line 41 connected to the second collecting gate line 21, the edge gate line can derive the current on the collecting gate line, ensure the stable output of the current, and improve the reliability of the current output.

[0080] According to some embodiments of the present invention, Figure 2 and Figure 6 As shown, the distance between the center of the second opening 122 adjacent to the first collecting grid line 20 and the corresponding side of the battery cell body 10 is a, and the distance between the center of the second opening 122 adjacent to the first collecting grid line 20 and the center of the adjacent first opening 112 is b, where a and b satisfy: a+b≤12mm, or 0.04≤a / b≤1.

[0081] That is, if the distance between the center of the second opening 122 adjacent to the first collecting grid line 20 and the corresponding side of the cell body 10 along the first direction A is greater than 12 mm, the distance between the welding strip for welding the first grid line 11 and the edge of the adjacent cell body 10 may be longer, and the path through which the current flows may be longer, which may easily cause current loss, and the welding strip may have a poor effect of collecting current, thereby affecting the output power of the cell 100. Further, in this embodiment, a+b>0, so that the thickened first edge grid line 40 can be set to a reasonable length, and while collecting the current on the first collecting grid line 20, the cost and the process difficulty of setting each grid line on the cell 100 are reduced, and the structure of the cell 100 is optimized. For example, a+b=10 mm.

[0082] Optionally, if the ratio of the distance between the center of the first opening 112 adjacent to the first collecting gate line 20 and the corresponding side of the battery cell body 10 to the distance between the center of the second opening 122 adjacent to the first collecting gate line 20 and the center of the adjacent first opening 112 is less than 0.04, it may be because the edge of the first opening 112 and the adjacent battery cell body 10 is smaller, and the distance between the second opening 122 and the first opening 112 along the first direction A is longer, which is not conducive to the setting of the gate line on the battery cell body 10, and increases the difficulty of setting the first gate line 11 or the second gate line 12 adjacent to the first collecting gate line 20. If the ratio of the distance between the center of the first opening 112 adjacent to the first collecting grid line 20 and the corresponding side of the cell body 10 to the distance between the center of the second opening 122 adjacent to the first collecting grid line 20 and the center of the adjacent first opening 112 is greater than 1, that is, the distance between the first opening 112 and the edge of the corresponding cell body 10 is greater than the distance between the second opening 122 and the edge of the corresponding cell body 10, the solder strip connected to the second grid line 12 may contact the first edge grid line 40 and cause a short circuit. a / b=0.5.

[0083] Thus, the distances between the first opening 112 and the second opening 122 adjacent to the first collecting grid line 20 and the corresponding edges of the battery cell body 10 are limited to simplify the structure of the battery cell 100, facilitate the arrangement of each grid line, and simultaneously realize effective collection of the current on the battery cell body 10, thereby improving the output power of the battery cell 100.

[0084] Specifically, Figure 2 and Figure 4 As shown, a and b respectively satisfy: 0.5mm≤a≤6mm, 6mm≤b≤11.5mm.

[0085] That is, if the distance between the center of the first opening 112 adjacent to the first collecting grid line 20 and the corresponding side of the cell body 10 is less than 0.5 mm, the distance between the center of the first opening 112 adjacent to the first collecting grid line 20 and the corresponding side of the cell body 10 is too small, which may cause the second connecting grid line 31 to be connected to the first collecting grid line 20, and the first connecting grid line 30 to be connected to the second collecting grid line 21, thereby causing a short circuit in the cell 100, and reducing the safety of the cell 100. The length of the first grid line segment 111 adjacent to the first collecting grid line 20 is short, which is not conducive to setting, and relatively easy to cause the length of another first grid line segment 111 adjacent to it to be too long, which has a poor effect on current collection. If the distance between the center of the first opening 112 adjacent to the first collecting grid line 20 and the corresponding side of the cell body 10 is greater than 6 mm, the first collecting grid line 20 collects too much current, and the requirements for the first edge grid line 40 are high, which increases the difficulty of design. For example, a=2 mm.

[0086] The distance between the center of the second opening 122 adjacent to the first collecting grid line 20 and the center of the adjacent first opening 112 is less than 6 mm. If the distance between the center of the second opening 122 adjacent to the first collecting grid line 20 and the center of the adjacent first opening 112 is too small, the length of the grid line between the first opening 112 and the second opening 122 may be shorter, the number of grid line segments set on the battery cell 100 is increased, and the increase in the process is not conducive to the arrangement and production of the battery cell 100. If the distance between the center of the second opening 122 adjacent to the first collecting grid line 20 and the center of the adjacent first opening 112 is greater than 11.5 mm, the distance between the center of the second opening 122 adjacent to the first collecting grid line 20 and the center of the adjacent first opening 112 is too large, which may result in a longer length of the second grid line 12 adjacent to the first collecting grid line 20, or a longer length of the first grid line 11 set adjacent to the second collecting grid line 21, making it difficult to achieve safe collection of the current on the battery cell body 10, which may easily cause the loss of current and inability to fully utilize it. For example, b = 10 mm.

[0087] Thus, the distance between the center of the first opening 112 adjacent to the first collecting grid line 20 and the corresponding side of the battery cell body 10 is defined, and the distance between the center of the second opening 122 adjacent to the first collecting grid line 20 and the center of the adjacent first opening 112 is defined, so as to better optimize the structure of the battery cell 100, facilitate the arrangement of the first grid line 11, the second grid line 12, the collecting grid line and the edge grid line, etc., improve the collection of the current generated by the battery cell body 10, help to increase the power of the battery cell 100, reduce the possibility of short circuit inside the battery cell 100, and increase the service life of the battery cell 100.

[0088] According to the battery string 200 of the second embodiment of the utility model, Figure 8 As shown, it includes: a plurality of battery cells 100 and a plurality of interconnecting structures 50, the battery cell 100 is a battery cell 100 according to the embodiment of the first aspect of the utility model; the plurality of battery cells 100 are connected by a plurality of interconnecting structures 50. In this embodiment, the interconnecting structure 50 is a welding strip. The plurality of battery cells 100 are arranged in a second direction B and connected by the interconnecting structure 50 to form a battery string 200, and the plurality of battery strings 200 are arranged along the first direction A.

[0089] According to some embodiments of the present invention, Figure 8 and Fig. 9As shown, the multiple interconnection structures 50 include: multiple first interconnection structures 501 and multiple second interconnection structures 502. The multiple first interconnection structures 501 are respectively connected to multiple first grid lines 11 of the battery cell 100. The first interconnection structure 501 adjacent to the edge of the battery cell 100 is a first edge interconnection structure. One end of the first edge interconnection structure adjacent to the edge of the battery cell 100 is located on the side of the first grid line 11 of the second edge grid line 41 adjacent to the battery cell 100, away from the second edge grid line 41.

[0090] Multiple second interconnecting structures 502 are respectively connected to multiple second grid lines 12 of the battery cell 100. The second edge interconnecting structure is adjacent to the edge of the battery cell 100 along the first direction A, and one end of the second edge interconnecting structure adjacent to the edge of the battery cell 100 along the second direction B is located on the side of the second grid line 12 of the first edge grid line 40 adjacent to the battery cell 100, away from the first edge grid line 40.

[0091] The second edge interconnection structure is arranged at the first opening 112 adjacent to the first collecting grid line 20, so as to connect a plurality of second grid lines 12. When the second edge interconnection structure is arranged, at least one end of the second interconnection structure 502 along the second direction B is located on the side of the second grid line 12 adjacent to the first edge grid line 40 away from the first edge grid line 40, and the second edge interconnection structure is arranged at intervals from the first edge grid line 40 at the corresponding end. Thus, the second edge interconnection structure is arranged at intervals from the first edge grid line 40 at the edge of the corresponding battery cell body 10, so as to avoid the second edge interconnection structure from contacting the first grid line 11 and causing a short circuit. The arrangement of the first interconnection structure 501 is the same as that of the second interconnection structure 502, and will not be repeated here.

[0092] According to some embodiments of the present invention, Fig.10 As shown, it further includes: a plurality of first adhesive members 60 , which are arranged on a side of the interconnection structure 50 away from the battery cell 100 , and the plurality of first adhesive members 60 are arranged at intervals along the length direction of the interconnection structure 50 .

[0093] A plurality of first adhesive members 60 are disposed on a side of the interconnection structure 50 away from the battery cell body 10, that is, after the interconnection structure 50 is arranged along the first direction A on the battery cell body 10, the first adhesive members 60 are disposed. The interconnection structure 50 and the battery cell body 10 are bonded to each other through the disposition of the first adhesive members 60, thereby increasing the reliability of the connection between the interconnection structure 50 and the battery cell body 10.

[0094] According to some embodiments of the present invention, Fig. 9As shown, it further includes: a plurality of second adhesive members 62, the plurality of second adhesive members 62 include a first sub-adhesive member 622 and a second sub-adhesive member 623, the first sub-adhesive member 622 is arranged between the first interconnecting structure member 501 and the battery cell 100, and the first sub-adhesive member 622 is located at the second opening 122, the second sub-adhesive member 623 is arranged between the second interconnecting structure member 502 and the battery cell 100, and the second sub-adhesive member 623 is located at the first opening 112.

[0095] The plurality of second adhesive members 62 include a second sub-adhesive member 623 disposed at the first opening 112 and a first sub-adhesive member 622 disposed at the second opening 122, and the plurality of first sub-adhesive members 622 and the plurality of second sub-adhesive members 623 are disposed between the interconnection structure 50 and the battery cell body 10 to fix the interconnection structure 50 on the battery cell body 10. The second sub-adhesive member 623 does not contact the adjacent first grid line 11, and the first sub-adhesive member 622 does not contact the adjacent second grid line 12.

[0096] Therefore, the provision of the plurality of second adhesive members 62 facilitates the fixation of the interconnection structure 50 before welding the interconnection structure 50 to the battery cell body 10, ensures the accuracy of the welding position during welding, and improves the welding quality.

[0097] According to some embodiments of the present invention, Figure 5 and Fig. 9 As shown, it further includes: a plurality of first gate line connecting lines 70, along the length direction of the first interconnection structure 501, the plurality of first gate line connecting lines 70 are respectively connected between two adjacent first gate lines 11 on both sides of the first sub-adhesive 622; a plurality of second gate line connecting lines 71, along the length direction of the second interconnection structure 502, the plurality of second gate line connecting lines 71 are respectively connected between two adjacent second gate lines 12 on both sides of the second sub-adhesive 623.

[0098] That is, a plurality of first gate line connection lines 70 extend along the second direction B of the battery cell 100, and at least connect two adjacent first gate lines 11. A plurality of second gate line connection lines 71 extend along the second direction B of the battery cell 100, and at least connect two adjacent second gate lines 12. The number of first gate lines 11 or second gate lines 12 connected by the first gate line connection lines 70 and the second gate line connection lines 71 is not limited to two adjacent gate lines. For example, the first gate line 11 connector can connect three or more first gate lines 11 along the second direction B, and the second gate line connection line 71 can connect three or more second gate lines 12 along the second direction B.

[0099] Taking the second gate line connection line 71 as an example, when the second adhesive 62 is set, the second adhesive 62 is located at the first opening 112. When the second edge interconnection structure is connected to the battery cell body 10, a force is applied to the second adhesive 62, and the second adhesive 62 is deformed and extends in all directions, which may contact the adjacent second gate line 12. That is, part of the second adhesive 62 is located between the second edge interconnection structure and the second gate line 12, resulting in the second edge interconnection structure not establishing an electrical connection with the second gate line 12, and failing to collect the current on the corresponding second gate line 12. By setting the second gate line connection line 71, the second gate line 12 that is not connected to the second edge interconnection structure can also be connected to the second edge interconnection structure through other second gate lines 12 connected thereto, thereby collecting the current of the corresponding second gate line 12.

[0100] Thus, the provision of the first gate line connection line 70 and the second gate line connection line 71 can increase the current collection on the corresponding first gate line 11 and the second gate line 12, increase the current output on the interconnection structure 50, and improve the connection strength between the interconnection structure 50 and the corresponding gate line.

[0101] The photovoltaic assembly according to the third embodiment of the utility model includes the battery cell 100 according to the first embodiment of the utility model, or the battery string 200 according to the second embodiment of the utility model.

[0102] According to the photovoltaic module of the utility model, the special structure design of the edge grid lines adjacent to the cell 100 is adopted to facilitate the electrical connection between the interconnection structure 50 and the corresponding grid lines, while avoiding the electrical connection between the interconnection structure 50 and the edge grid lines with opposite polarities, thereby reducing the precision requirement for the interconnection structure 50. At the same time, due to the different positions of the edge grid lines, the setting of the insulation in the prior art is eliminated, so that the current on the grid lines of the corresponding polarity can be collected without the use of insulation glue on the cell 100 and the short circuit will not occur, so that the photovoltaic module with the cell 100 has good quality and high processing efficiency, and improves the yield rate and service life of the photovoltaic module.

[0103] The photovoltaic power generation system according to the fourth aspect of the present invention comprises the battery cell 100 according to the first aspect of the present invention, or the battery string 200 according to the second aspect of the present invention, or the photovoltaic module according to the third aspect of the present invention.

[0104] 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 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0105] In the description of the present utility model, "first feature" and "second feature" may include one or more of the features. In the description of the present utility model, "plurality" means two or more. In the description of the present utility model, the first feature "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact not directly but through another feature between them. In the description of the present utility model, the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.

[0106] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0107] 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 spirit 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; A plurality of first grid lines and a plurality of second grid lines, wherein the plurality of first grid lines and the plurality of second grid lines are alternately arranged in the battery cell body, each of the first grid lines comprises a plurality of first grid line segments, two adjacent first grid line segments are spaced apart from each other to define a first opening, each of the second grid lines comprises a plurality of second grid line segments, two adjacent second grid line segments are spaced apart from each other to define a second opening, the first grid lines and the second grid lines have different polarities, at least one of the plurality of first grid lines located at an edge of the battery cell body is a first edge grid line, and at least one of the plurality of second grid lines located at an edge of the battery cell body is a second edge grid line; a first collecting gate line and a second collecting gate line, wherein the first collecting gate line and the second collecting gate line are respectively arranged at two ends of a plurality of the first gate lines and a plurality of the second gate lines, the first collecting gate line is connected to ends of the plurality of the first gate lines, the second collecting gate line is connected to ends of the plurality of the second gate lines, the first edge gate line is continuous at the first opening adjacent to the first collecting gate line corresponding to the remaining first gate lines, and the second edge gate line is continuous at the second opening adjacent to the second collecting gate line corresponding to the remaining second gate lines; The connecting gate lines include at least one first connecting gate line and at least one second connecting gate line, wherein the first connecting gate line is connected between the first gate line adjacent to the second edge gate line and at least one of the remaining first gate lines, and the second connecting gate line is connected between the second gate line adjacent to the first edge gate line and at least one of the remaining second gate lines.

2. The battery cell according to claim 1, characterized in that: The first connecting gate line is located at the second opening, and the second connecting gate line is located at the first opening.

3. The battery cell according to claim 1, characterized in that: The first gate line adjacent to the second edge gate line is disconnected at the second opening adjacent to the second collecting gate line to form two adjacent first gate line segments, there are two first connecting gate lines, and the two first connecting gate lines are respectively connected between the two adjacent first gate line segments and at least one remaining first gate line; The second gate line adjacent to the first edge gate line is disconnected at the first opening adjacent to the first collecting gate line to form two adjacent second gate line segments. There are two second connecting gate lines, and the two second connecting gate lines are respectively connected between the two adjacent second gate line segments and at least one remaining second gate line.

4. The battery cell according to claim 3, characterized in that: Along the direction away from the second edge gate line, the distance between the two first connection gate lines gradually decreases; Along the direction away from the first edge gate line, the distance between the two second connection gate lines gradually decreases.

5. The battery cell according to claim 4, characterized in that: Along a direction away from the second edge gate line, the two first connection gate lines extend obliquely toward each other; Along a direction away from the first edge gate line, the two second connection gate lines extend obliquely toward each other.

6. The battery cell according to claim 1, characterized in that: The first connecting gate line is connected between the first gate line adjacent to the second edge gate line and a plurality of adjacent first gate lines; The second connecting gate line is connected between the second gate line adjacent to the first edge gate line and a plurality of adjacent second gate lines.

7. The battery cell according to claim 6, characterized in that: The first connecting gate line is perpendicular to the first gate line; The second connecting gate line is perpendicular to the second gate line.

8. The battery cell according to claim 1, characterized in that: At least one of the remaining first gate lines has a first thickened section, the first thickened section is located at the second opening of the first gate line adjacent to the second collecting gate line, and the first connecting gate line is connected between the first gate line adjacent to the second edge gate line and the first thickened section; At least one of the remaining second gate lines has a second thickened section, which is located at the first opening of the second gate line adjacent to the first collecting gate line, and the second connecting gate line is connected between the second gate line adjacent to the first edge gate line and the second thickened section.

9. The battery cell according to claim 1, characterized in that: The width of the second opening of the first edge gate line at least located at the first collecting gate line and adjacent to the first collecting gate line is greater than the width of the remaining portion of the first edge gate line; The width of at least the first opening of the second edge gate line located at the second collecting gate line and adjacent to the second collecting gate line is greater than the width of the remaining portion of the second edge gate line.

10. The battery cell according to any one of claims 1 to 9, characterized in that: The distance between the center of the second opening adjacent to the first collecting grid line and the corresponding side of the battery cell body is a, and the distance between the center of the second opening adjacent to the first collecting grid line and the center of the adjacent first opening is b, wherein a and b satisfy: a+b≤12mm, or 0.04≤a / b≤1.

11. The battery cell according to claim 10, characterized in that: The a and b respectively satisfy: 0.5mm≤a≤6mm, 6mm≤b≤11.5mm.

12. A battery string, characterized in that: include: A plurality of battery cells, wherein the battery cells are battery cells according to any one of claims 1 to 11; A plurality of interconnecting structural members, wherein the plurality of battery cells are connected by the plurality of interconnecting structural members.

13. The battery string according to claim 12, characterized in that: The plurality of interconnected structural members include: A plurality of first interconnecting structural members, wherein the plurality of first interconnecting structural members are respectively connected to a plurality of first grid lines of the battery cell, the first interconnecting structural member adjacent to the edge of the battery cell is a first edge interconnecting structural member, and one end of the first edge interconnecting structural member adjacent to the edge of the battery cell is located on a side of a first grid line adjacent to a second edge grid line of the battery cell away from the second edge grid line; A plurality of second interconnecting structural members are respectively connected to a plurality of second grid lines of the battery cell, a second edge interconnecting structural member is adjacent to the edge of the battery cell, and one end of the second edge interconnecting structural member adjacent to the edge of the battery cell is located on a side of a second grid line adjacent to a first edge grid line of the battery cell away from the first edge grid line.

14. The battery string according to claim 13, characterized in that: Further including: A plurality of first adhesive members are provided on a side of the interconnection structure away from the battery cell, and the plurality of first adhesive members are arranged at intervals along a length direction of the interconnection structure.

15. The battery string according to claim 13, characterized in that: Further including: A plurality of second adhesive members, the plurality of second adhesive members include a first sub-adhesive member and a second sub-adhesive member, the first sub-adhesive member is arranged between the first interconnection structure member and the battery cell, the first sub-adhesive member is located at the second opening, the second sub-adhesive member is arranged between the second interconnection structure member and the battery cell, and the second sub-adhesive member is located at the first opening.

16. The battery string according to claim 15, characterized in that: Further including: A plurality of first gate line connection lines, along the length direction of the first interconnection structure, the plurality of first gate line connection lines are respectively connected between two adjacent first gate lines on both sides of the first sub-adhesive member; A plurality of second gate line connection lines are respectively connected between two adjacent second gate lines on both sides of the second sub-adhesive member along the length direction of the second interconnection structure.

17. A photovoltaic module, characterized in that: The method comprises a battery cell according to any one of claims 1 to 11, or a battery string according to any one of claims 12 to 16.

18. A photovoltaic power generation system, characterized in that: The invention comprises the solar cell according to any one of claims 1 to 11, or the solar cell string according to any one of claims 12 to 16, or the photovoltaic module according to claim 17.

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