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

Abstract

The utility model discloses a battery piece assembly, a battery string, a photovoltaic assembly and a photovoltaic power generation system, the battery piece assembly comprises a battery piece, a plurality of interconnection structural members and a plurality of first bonding members, the battery piece is provided with a plurality of grid lines and a plurality of connection grid lines, the connection grid lines are arranged in the edge area of the battery piece and / or the middle area of the battery piece, and the first bonding members are arranged on the connection grid lines. The connecting grid lines intersect and are electrically connected with at least two adjacent grid lines; the plurality of interconnection structural members are arranged at intervals, the interconnection structural members intersect and are electrically connected with the plurality of grid lines, and the interconnection structural members are electrically connected with the connecting grid lines and / or the interconnection structural members are electrically connected with the grid lines connected with the connecting grid lines; the plurality of first bonding members are respectively arranged between the battery piece and the plurality of interconnection structural members, and the first bonding members are located at the connection grid lines. Therefore, the first bonding piece is used for pre-fixing the interconnection structural piece and ensuring the connection between the interconnection structural piece and the battery piece, and the connection grid line is used for increasing the contact area between the interconnection structural piece and the grid line and improving the current collection efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to photovoltaic module technical field especially is related to a kind of cell piece assembly, cell string, photovoltaic module and photovoltaic power generation system. BACKGROUND

[0002] In prior art, first print thermosetting adhesive strip on cell, then place solder strip on thermosetting adhesive strip, by exerting pressure on solder strip, let solder strip squeeze open thermosetting adhesive, and let cell grid line and solder strip weld, to realize the contact of cell grid line and solder strip. However, this method cannot guarantee that solder strip can completely squeeze open thermosetting adhesive, and the residual thermosetting adhesive between cell grid line and solder strip will cause partial cell grid line and solder strip to appear poor contact, affecting the current transmission efficiency of module. SUMMARY

[0003] The utility model aims at at least one of the technical problems existing in prior art. To this end, the first purpose of the utility model is to propose a kind of cell piece assembly, can improve the current collection efficiency of cell piece assembly, improve the structural stability of cell piece assembly.

[0004] The second purpose of the utility model is to propose a kind of cell string, including the cell piece assembly described in the above embodiment.

[0005] The third purpose of the utility model is to propose a kind of photovoltaic module, including the cell piece assembly or cell string described in the above embodiment.

[0006] The fourth purpose of the utility model is to propose a kind of photovoltaic power generation system, including the cell piece assembly, cell string or photovoltaic module described in the above embodiment.

[0007] According to the cell piece assembly of the first aspect embodiment of the utility model, it includes: cell piece, multiple interconnection structural members and multiple first adhesive members, the cell piece is equipped with multiple grid lines and multiple connection grid lines, the connection grid line is located at the edge area of the cell piece and / or the middle area of the cell piece, and the connection grid line intersects and is electrically connected with at least two adjacent grid lines;Multiple interconnection structural members are arranged at intervals, and the interconnection structural member intersects and is electrically connected with multiple grid lines, the interconnection structural member is electrically connected with the connection grid line and / or the grid line connected with the connection grid line is electrically connected with the interconnection structural member;Multiple first adhesive members are respectively arranged between the cell piece and multiple interconnection structural members, and the first adhesive member is located at the connection grid line, and the adjacent at least two grid lines are adapted to be electrically connected with corresponding interconnection structural member through the connection grid line.

[0008] The battery piece is used for collecting sunlight and converting solar energy into electric energy, the interconnection structure member is in contact with the grid line so as to facilitate the collection of the current generated by the battery piece, the first adhesive member is used for pre-fixing the interconnection structure member, and the connection of the interconnection structure member and the battery piece is ensured, the setting of the connecting grid line is used for increasing the contact area between the interconnection structure member and the grid line, the collection path of the current can be further optimized, the connecting grid line connects a plurality of grid lines, the transmission channel of the current is increased, and the efficiency of current collection is improved.

[0009] In some embodiments, the connecting grid line comprises a first connecting grid line and a second connecting grid line which are arranged at intervals along the extension direction of the grid line, and the interconnection structure member and the first adhesive member are arranged between the first connecting grid line and the second connecting grid line.

[0010] In some embodiments, the plurality of grid lines comprises intermittent grid lines and continuous grid lines, the intermittent grid line comprises a plurality of grid line segments, two adjacent grid line segments are separated by the connecting grid line, two ends of the grid line segment are connected with adjacent first connecting grid lines and second connecting grid lines of two adjacent connecting grid lines respectively, and the connecting grid line extends to the continuous grid line, and the first adhesive member is located between two adjacent continuous grid lines.

[0011] In some embodiments, the plurality of connecting grid lines extends along the length direction of the interconnection structure member, and the plurality of first adhesive members are arranged on the side of the plurality of connecting grid lines away from the battery piece.

[0012] In some embodiments, the first adhesive member is arranged between the connecting grid line and the interconnection structure member.

[0013] In some embodiments, the first adhesive member is located between two adjacent grid lines.

[0014] In some embodiments, the height of the interconnection structure member along the thickness direction of the battery piece is greater than or equal to the height of the first adhesive member along the thickness direction of the battery piece.

[0015] In some embodiments, along the thickness direction of the battery piece, the distance between the side surface of the interconnection structure member away from the battery piece and the side surface of the battery piece is H1, along the thickness direction of the battery piece, the height of the distance between the side surface of the first adhesive member away from the battery piece and the side surface of the battery piece is H2, and the H2 satisfies: 0.01mm≤H2≤H1.

[0016] In some embodiments, the first adhesive has a length L1 along the length direction of the interconnection structure, and the L1 satisfies: 0.3mm≤L1≤3mm; and / or, the first adhesive has a length L2 along the width direction of the interconnection structure, and the L2 satisfies: 0.3mm≤L2≤3mm.

[0017] In some embodiments, the distance between the side surface of the interconnection structure away from the battery piece and the side surface of the battery piece along the thickness direction of the battery piece is H1, and the H1 satisfies: 0.1mm≤H1≤0.3mm.

[0018] In some embodiments, at least part of the plurality of first adhesives are arranged adjacent to at least one side edge of the battery piece along the extension direction of the interconnection structure.

[0019] In some embodiments, the battery piece is provided with the first adhesive at both side edges thereof along the extension direction of the interconnection structure, and at least one first adhesive is arranged between the first adhesives at both side edges of the battery piece along the extension direction of the interconnection structure.

[0020] In some embodiments, the application further comprises: a plurality of second adhesives, the second adhesives being arranged on the side of the interconnection structure away from the battery piece, and the interconnection structure being connected to the battery piece through the second adhesives.

[0021] In some embodiments, both ends of the second adhesive extend to the first adhesives adjacent to both sides of the battery piece along the extension direction of the interconnection structure, and the second adhesive is opposite to the interconnection structure along the thickness direction of the battery piece.

[0022] In some embodiments, the diameter of the interconnection structure is D, the length of the second adhesive along the length direction of the grid line is L3, and the L3 satisfies: D≤L3≤3mm; and / or, the height of the second adhesive along the thickness direction of the battery piece is H3, and the H3 satisfies: D≤H3≤0.4mm.

[0023] In some embodiments, the diameter of the interconnection structure is D, and the D satisfies: 0.1mm≤D≤0.3mm.

[0024] In some embodiments, the number of the interconnection structures is N, and the N satisfies: 10≤N≤30.

[0025] In some embodiments, the first adhesive is UV glue or heat-curing glue; and / or, the second adhesive is UV glue or heat-curing glue.

[0026] In some embodiments, the interconnection structure includes a base material and a solder layer provided on an outer circumferential side of the base material, and at least a portion of the gate line is embedded in the solder layer.

[0027] In some embodiments, the connecting gate line and the interconnection structure are both perpendicular to the gate line.

[0028] According to the battery string of the second aspect of the present application, the battery piece assembly of the first aspect of the present application is used.

[0029] According to the photovoltaic module of the third aspect of the present application, the battery piece assembly of the first aspect of the present application or the battery string of the second aspect of the present application is used.

[0030] According to the photovoltaic power generation system of the fourth aspect of the present application, the battery piece assembly of the first aspect of the present application, the battery string of the second aspect of the present application, or the photovoltaic module of the third aspect of the present application is used.

[0031] The additional aspects and advantages of the present application will be partially given in the following description, partially will become obvious from the following description, or will be understood by the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0032] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

[0033] Figure 1 is a schematic view of a first embodiment of a battery piece and a first adhesive according to the present application;

[0034] Figure 2 is a schematic view of a second embodiment of a battery piece and a first adhesive according to the present application;

[0035] Figure 3 is a schematic view of a third embodiment of a battery piece and a first adhesive according to the present application;

[0036] Figure 4 is a schematic view of an interconnection structure according to the present application;

[0037] Figure 5 is a schematic view of an embodiment of a battery piece assembly according to the present application;

[0038] Figure 6 is a schematic view of another embodiment of a battery piece assembly according to the present application;

[0039] Figure 7 is a cross-sectional schematic view of a battery piece, an interconnection structure and a grid line according to an embodiment of the present application;

[0040] Figure 8 is a cross-sectional schematic view of a battery piece assembly according to an embodiment of the present application.

[0041] Reference signs:

[0042] 100, battery piece assembly;

[0043] 10, battery piece; 11, interconnection structure; 111, base material; 112, solder layer; 12, first adhesive; 13, second adhesive; 14, grid line; 15, intermittent grid line; 16, continuous grid line; 17, connecting grid line; 18, first connecting grid line; 19, second connecting grid line;

[0044] A, first direction; B, second direction; C, thickness direction. DETAILED DESCRIPTION

[0045] The embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments described with reference to the accompanying drawings are exemplary, and the following description is made with reference to Figures 1-8 A battery piece assembly 100 according to an embodiment of the present application is described below. The battery piece assembly 100 includes a battery piece 10, a plurality of interconnection structures 11 and a plurality of first adhesives 12, and has a first direction A and a second direction B.

[0046] Specifically, as shown in Figures 1-8 , the battery piece 10 is provided with a plurality of grid lines 14 and a plurality of connecting grid lines 17, the connecting grid lines 17 are arranged at the edge region of the battery piece 10 and / or the middle region of the battery piece 10, the connecting grid lines 17 intersect and are electrically connected with at least two adjacent grid lines 14; the plurality of interconnection structures 11 are arranged at intervals, the interconnection structures 11 intersect and are electrically connected with the plurality of grid lines 14, the interconnection structures 11 are electrically connected with the connecting grid lines 17 and / or the grid lines 14 to which the connecting grid lines 17 are connected are electrically connected with the interconnection structures 11; the plurality of first adhesives 12 are respectively arranged between the battery piece 10 and the plurality of interconnection structures 11, the first adhesives 12 are located at the connecting grid lines 17, and the at least two adjacent grid lines 14 are adapted to be electrically connected with the corresponding interconnection structures 11 through the connecting grid lines 17.

[0047] In combination Figures 1-4 , the grid lines 14 extend along the first direction A of the battery piece assembly 100, and the plurality of grid lines 14 are uniformly and spacedly arranged on one side surface of the battery piece 10 along the thickness direction C.

[0048] The connection grid lines 17 extend along the second direction B, the length of the connection grid lines 17 in the second direction B is short, the connection grid lines 17 are arranged perpendicularly to the grid lines 14, the connection grid lines 17 comprise a plurality, the plurality of connection grid lines 17 are arranged at intervals along the first direction A, and the plurality of connection grid lines 17 are connected with the grid lines 14 located at the edges of the solar cell sheet 10 on both sides in the second direction B.

[0049] The interconnection structure 11 extends along the second direction B, and a plurality of interconnection structures 11 are arranged at intervals along the first direction A of the solar cell sheet assembly 100. Part of the interconnection structure 11 is adapted to be connected with the first adhesive 12, and the interconnection structure 11 is at least partially in direct contact with the plurality of grid lines 14.

[0050] In some embodiments, one interconnection structure 11 corresponds to two connection grid lines 17, the two connection grid lines 17 are respectively connected with both ends of the interconnection structure 11 in the second direction B, and the first adhesive 12 is arranged on the connection grid lines 17 and connected with the interconnection structure 11. In some embodiments, one interconnection structure 11 corresponds to three connection grid lines 17, the three connection grid lines 17 are respectively located at the edge regions of the solar cell sheet 10 on both sides in the second direction B and the middle region of the solar cell sheet 10, and the first adhesive 12 is arranged on the connection grid lines 17 and connected with the interconnection structure 11. The interconnection structure 11 is arranged on the solar cell sheet 10 and in contact with the grid lines 14 on the solar cell sheet 10, for collecting and conducting current.

[0051] According to the solar cell sheet assembly 100 of the embodiment of the present application, the solar cell sheet 10 is used for collecting sunlight and converting solar energy into electrical energy, the interconnection structure 11 is in contact with the grid lines 14 to facilitate the collection of the current generated by the solar cell sheet 10, the first adhesive 12 is used for pre-fixing the interconnection structure 11, and the connection between the interconnection structure 11 and the solar cell sheet 10 is ensured. The connection grid lines 17 are arranged to increase the contact area between the interconnection structure 11 and the grid lines 14, the collection path of the current can be further optimized, the connection grid lines 17 connect the plurality of grid lines 14, the transmission channel of the current is increased, and the efficiency of current collection is improved.

[0052] According to some embodiments of the present application, as shown in Figures 1-4 The connection grid lines 17 extend along the second direction B, the length of the connection grid lines 17 in the second direction B is short, the connection grid lines 17 are arranged perpendicularly to the grid lines 14, the connection grid lines 17 comprise a plurality, the plurality of connection grid lines 17 are arranged at intervals along the first direction A, and the plurality of connection grid lines 17 are connected with the grid lines 14 located at the edges of the solar cell sheet 10 on both sides in the second direction B.

[0053] The first connection grid line 18 and the second connection grid line 19 extend along the second direction B, the first connection grid line 18 and the second connection grid line 19 are arranged at intervals along the first direction A, and the first connection grid line 18 and the second connection grid line are connected with the plurality of grid lines 14.

[0054] Therefore, the arrangement of the first connection grid line 18 and the second connection grid line 19 can more evenly disperse the current and improve the current collection efficiency, the interconnection structure 11 and the first adhesive 12 are arranged between the first connection grid line 18 and the second connection grid line 19, which can facilitate the arrangement of the first adhesive 12 on the battery piece 10, reduce the production difficulty of the battery piece assembly 100, and also reduce the shielding area of the first adhesive 12 to the grid line 14, thereby improving the current collection efficiency.

[0055] According to some embodiments of the present application, as shown in Figures 1-3 The plurality of grid lines 14 include the intermittent grid line 15 and the continuous grid line 16, the intermittent grid line 15 includes a plurality of grid line segments, and the adjacent two grid line segments are separated by the connection grid line 17. The two ends of the grid line segment are connected with the adjacent first connection grid line 18 and the second connection grid line 19 of the adjacent two connection grid lines 17, respectively, and the connection grid line 17 extends to the continuous grid line 16. The first adhesive 12 is located between the adjacent two continuous grid lines 16.

[0056] The intermittent grid line 15 is arranged at least one side edge of the battery piece 10 along the extension direction of the interconnection structure 11, and the continuous grid line 16 is arranged at one side adjacent to the center of the battery piece 10. The plurality of intermittent grid lines 15 are arranged at the two side edges of the battery piece 10 along the second direction B of the battery piece assembly 100, respectively. The plurality of connection grid lines 17 are arranged between the intermittent grid lines 15, and the first adhesive 12 is arranged between the two adjacent continuous grid lines 16.

[0057] Therefore, by arranging the first adhesive 12 between the adjacent two continuous grid lines 16, the contact between the first adhesive 12 and the grid line 14 can be avoided, the contact area between the grid line 14 and the interconnection structure 11 is reduced, the interconnection structure 11 can collect current more effectively, and the overall current collection efficiency is improved. By reasonably arranging the first adhesive 12, the structural stability of the connection between the interconnection structure 11 and the battery piece 10 can be enhanced.

[0058] According to some embodiments of the present application, as shown in Figures 1-4 The plurality of connection grid lines 17 extend along the length direction of the interconnection structure 11, and the plurality of first adhesives 12 are arranged on the side away from the battery piece 10. The first adhesive 12 is suitable for being adhered to the interconnection structure 11 to fix the interconnection structure 11 on the battery piece 10. Therefore, the plurality of first adhesives 12 are arranged on the side away from the battery piece 10, at least part of the surface of the interconnection structure 11 adjacent to the battery piece 10 is in contact with the first adhesive 12, at least part of the surface is suitable for being in contact with the connection grid line 17, the interconnection structure 11 is fixed on the battery piece 10 by the plurality of first adhesives 10, and the connection grid line 17 can improve the current transmission efficiency between the interconnection structure 11 and the battery piece 10.

[0059] According to some embodiments of the present application, as shown in Figures 1-4 The first adhesive 12 is arranged between the connecting grid line 17 and the interconnection structure 11.

[0060] The first adhesive 12 is arranged between the connecting grid line 17 and the interconnection structure 11.

[0061] The first adhesive 12 is arranged between the connecting grid line 17 and the interconnection structure 11.

[0062] According to some embodiments of the present application, as shown in Figures 1-4 The first adhesive 12 is arranged between the connecting grid line 17 and the interconnection structure 11.

[0063] According to some embodiments of the present application, as shown in Figures 1-4 The first adhesive 12 is arranged between the connecting grid line 17 and the interconnection structure 11.

[0064] The first adhesive 12 is arranged between the connecting grid line 17 and the interconnection structure 11.

[0065] According to some embodiments of the present application, as shown in Figures 1-4As shown, the distance between the side surface of the interconnection structure 11 away from the battery sheet 10 and the side surface of the battery sheet 10 along the thickness direction C of the battery sheet 10 is H1, the distance between the side surface of the first adhesive 12 away from the battery sheet 10 and the side surface of the battery sheet 10 along the thickness direction C of the battery sheet 10 is H2, and H2 satisfies: 0.01mm≤H2≤H1. The minimum height of the first adhesive 12 along the thickness direction C of the battery sheet 10 is 0.01mm, which ensures that the first adhesive 12 has sufficient thickness to provide the necessary adhesive force and ensure the mechanical fixation and electrical contact between the interconnection structure 11 and the battery sheet 10. The maximum height of the first adhesive 12 along the thickness direction C of the battery sheet 10 does not exceed the height of the interconnection structure 11 along the thickness direction C of the battery sheet 10, which can avoid the first adhesive 12 sticking to the press used to press the interconnection structure 11 in subsequent processes, reducing the risk of glue residue.

[0066] Thus, by limiting the height range of the first adhesive, the contact surface between the interconnection structure 11 and the grid line 14 can be ensured to be clean, reducing glue residue and improving contact quality. In subsequent processing, since the height of the interconnection structure 11 is higher than that of the first adhesive 12, when the interconnection structure 11 is fixed or compacted using tools such as a press, the first adhesive 12 will not contact these tools, thereby avoiding the problem of sticking.

[0067] According to some embodiments of the present application, as shown in Figures 1-4 As shown, the length of the first adhesive 12 along the length direction of the interconnection structure 11 is L1, and L1 satisfies: 0.3mm≤L1≤3mm; and / or, the length of the first adhesive 12 along the width direction of the interconnection structure 11 is L2, and L2 satisfies: 0.3mm≤L2≤3mm.

[0068] That is, the length or width range of the first adhesive is limited, and the minimum size of 0.3mm ensures that the first adhesive 12 has sufficient area to provide the necessary adhesive force and ensure the mechanical fixation between the interconnection structure 11 and the battery sheet 10. The maximum size of 3mm avoids the first adhesive 12 being too large, reducing material waste, while ensuring that the contact area between the interconnection structure 11 and the grid line 14 is maximized, improving current collection efficiency.

[0069] Thus, by limiting the range of the first adhesive 12 in the length direction and the width direction, the connection strength between the interconnection structure 11 and the battery sheet 10 can be ensured, while avoiding the first adhesive 12 being too large to block the grid line 14, avoiding affecting the current collection efficiency.

[0070] According to some embodiments of the present application, as shown in Figures 1-7As shown, the distance between the side surface of the interconnection structure 11 away from the battery sheet 10 and the side surface of the battery sheet 10 along the thickness direction C of the battery sheet 10 is H1, and H1 satisfies: 0.1mm≤H1≤0.3mm.

[0071] That is, the height of the interconnection structure 11 along the thickness direction C of the battery sheet 10 is H1, if the height of the interconnection structure 11 along the thickness direction C of the battery sheet 10 is less than 0.1mm, the thickness of the interconnection structure 11 is too small, which leads to poor structural strength of the interconnection structure 11, and the interconnection structure 11 is prone to breakage. If the height of the interconnection structure 11 along the thickness direction C of the battery sheet 10 is greater than 0.3mm, the thickness of the interconnection structure 11 is too large, which is not conducive to reducing the material usage.

[0072] Therefore, by limiting the height range of the interconnection structure 11 along the thickness direction C of the battery sheet 10, the transmission efficiency of the current can be ensured while the mechanical strength of the interconnection structure 11 is ensured, and the production cost of the battery sheet assembly 100 is reduced.

[0073] According to some embodiments of the present application, as shown in Figures 1-4 As shown, at least part of the plurality of first adhesive members 12 is arranged adjacent to at least one side edge of the battery sheet 10 along the extension direction of the interconnection structure 11. That is, the first adhesive member 12 is connected to at least one end of the edge of the battery sheet 10 along the extension direction of the interconnection structure 11, which increases the mechanical stability of the connection between the interconnection structure 11 and the edge region of the battery sheet 10, prevents the interconnection structure 11 from loosening or falling off in the edge region, and strengthens the fixation of the edge region, which can improve the reliability of the entire battery sheet assembly 100.

[0074] According to some embodiments of the present application, as shown in Figures 1-4 As shown, the two side edges of the battery sheet 10 along the extension direction of the interconnection structure 11 are respectively provided with first adhesive members 12, and at least one first adhesive member 12 is arranged between the first adhesive members 12 of the two side edges of the battery sheet 10 along the extension direction of the interconnection structure 11.

[0075] In some embodiments, one interconnection structure 11 can correspond to two first adhesive members 12, and the two first adhesive members 12 are respectively connected to both ends of the interconnection structure 11 along the second direction B. In some embodiments, one interconnection structure 11 corresponds to three first adhesive members 12, and the three first adhesive members 12 are arranged at intervals along the second direction B, wherein two first adhesive members 12 are arranged adjacent to the two side edges of the battery sheet 10 along the second direction B, and one first adhesive member 12 is located in the middle of the battery sheet 10 along the second direction B.

[0076] Therefore, the first adhesive 12 is arranged at both side edges of the battery piece 10 along the extension direction of the interconnection structure 11, the fixation of both ends of the interconnection structure 11 can be ensured in the two side edge areas, the mechanical stability of the edge area of the battery piece 10 can be increased, and the interconnection structure 11 in the edge area is prevented from loosening or falling off. The first adhesive 12 between the two side edges of the battery piece 10 along the extension direction of the interconnection structure 11 ensures the fixation of the middle area of the interconnection structure 11, and the overall mechanical stability is improved.

[0077] According to some embodiments of the present application, as shown in Figure 5 and Figure 6 Further comprising: a plurality of second adhesives 13, the second adhesive 13 is arranged on the side of the interconnection structure 11 away from the battery piece 10, and the interconnection structure 11 is connected with the battery piece 10 through the second adhesive 13. The second adhesive 13 is arranged on the side of the interconnection structure 11 away from the battery piece 10, and the second adhesive 13 covers the interconnection structure 11 on both sides along the direction perpendicular to the interconnection structure 11 and is connected with the battery piece 10. The second adhesive 13 extends along the second direction B, the width of the second adhesive 13 along the first direction A is greater than the width of the interconnection structure 11 in the first direction A, the second adhesive 13 is arranged on the side of the interconnection structure 11 away from the battery piece 10 along the thickness direction C of the battery piece 10, and the two side edges of the second adhesive 13 along the second direction B are adapted to be bonded with the surface of the battery piece 10.

[0078] Therefore, the main function of the second adhesive 13 is to further reinforce the connection between the interconnection structure 11 and the battery piece 10. By arranging the second adhesive 13 on the interconnection structure 11, the stability of the connection between the interconnection structure 11 and the battery piece 10 can be increased. The second adhesive 13 can help to distribute the pressure received by the interconnection structure 11, reduce the risk of separation between the interconnection structure 11 and the battery piece 10 caused by external force, improve the overall reliability and service life of the battery piece assembly 100, and the arrangement of the second adhesive 13 can ensure the performance of the assembly under various environmental conditions, thereby improving the overall efficiency of the battery piece assembly 100.

[0079] According to some embodiments of the present application, as shown in Figure 5 and Figure 6 The two ends of the second adhesive 13 extend to the first adhesive 12 adjacent to both sides of the battery piece 10 along the extension direction of the interconnection structure 11, respectively, and the second adhesive 13 is opposite to the interconnection structure 11 along the thickness direction C of the battery piece 10.

[0080] The two ends of the interconnection structure 11 along the second direction B are fixed on the battery sheet 10 by the first adhesive 12, and the second adhesive 13 is arranged between the two first adhesives 12 to fix the part of the interconnection structure 11 between the two first adhesives 12 along the second direction B. The two ends of the second adhesive 13 along the second direction B are arranged adjacent to the first adhesive 12, thereby forming a more stable fixation of the interconnection structure 11 with the first adhesive 12.

[0081] Therefore, the first adhesive 12 is arranged between the interconnection structure 11 and the battery sheet 10 at the two ends along the extension direction of the interconnection structure 11 to preliminarily fix the interconnection structure 11. The second adhesive 13 is arranged on the side of the interconnection structure 11 away from the battery sheet 10 between the first adhesives 12 to further strengthen the connection between the interconnection structure 11 and the battery sheet 10. The double fixation of the first adhesive 12 and the second adhesive 13 ensures the stable connection between the interconnection structure 11 and the grid line 14 and improves the structural stability of the entire assembly. The reasonable layout of the first adhesive 12 and the second adhesive 13 reduces the residual glue between the interconnection structure 11 and the grid line 14 and ensures the smoothness of the current transmission path.

[0082] According to some embodiments of the present application, as shown in Figure 5 and Figure 6 The diameter of the interconnection structure 11 is D, the length of the second adhesive 13 along the length direction of the grid line 14 is L3, and L3 satisfies: D≤L3≤3mm; and / or, the height of the second adhesive 13 along the thickness direction C of the battery sheet 10 is H3, and H3 satisfies: D≤H3≤0.4mm.

[0083] The length of the second adhesive 13 in the length direction of the grid line 14 should be between the diameter D of the interconnection structure 11 and 3mm. The height of the second adhesive 13 in the thickness direction C of the battery sheet 10 should be between the diameter D of the interconnection structure 11 and 0.4mm. The minimum size D ensures that the second adhesive 13 has sufficient area and thickness to cover the interconnection structure 11 to provide the necessary adhesive force and ensure the mechanical fixation between the interconnection structure 11 and the battery sheet 10. The maximum sizes of 3mm and 0.4mm avoid the second adhesive 13 being too large, reducing material waste.

[0084] Therefore, by limiting the size range of the second adhesive 13, the connection between the interconnection structure 11 and the battery sheet 10 is further strengthened, the stability of the connection between the interconnection structure 11 and the battery sheet 10 is increased, and the material of the second adhesive 13 is reduced, thereby reducing the production cost of the battery sheet assembly 100.

[0085] According to some embodiments of the present application, as shown in Figure 4As shown, the diameter of the interconnection structure 11 is D, and D satisfies: 0.1mm≤D≤0.3mm.

[0086] If the diameter of the interconnection structure 11 along the diameter of the battery sheet 10 is less than 0.1mm, the interconnection structure 11 is too thin, and the structural strength of the interconnection structure 11 is poor, which causes the interconnection structure 11 to be prone to breakage. If the diameter of the interconnection structure 11 is greater than 0.3mm, the interconnection structure 11 is too thick, which is not conducive to reducing material usage.

[0087] Therefore, by limiting the range of the diameter of the interconnection structure 11, the transmission efficiency of the current can be ensured while the mechanical strength of the interconnection structure 11 is ensured, and the production cost of the battery sheet assembly 100 is reduced.

[0088] According to some embodiments of the present application, as shown in Figure 4 As shown, the number of interconnection structures 11 is N, and N satisfies: 10≤N≤30.

[0089] Limiting the range of the number of interconnection structures 11 can ensure uniform distribution of current on the battery sheet 10, reduce local current density, avoid hot spot effect, and improve overall current collection efficiency. The plurality of interconnection structures 11 can provide a plurality of low-resistance current transmission paths, reduce resistance loss, and improve the output power of the battery sheet 10. The number of interconnection structures 11 is controlled between 10 and 30, which can realize standardization in the production process, improve production efficiency, and reduce cost.

[0090] According to some embodiments of the present application, the first adhesive 12 is UV glue or heat-curing glue; and / or, the second adhesive 13 is UV glue or heat-curing glue.

[0091] UV glue can be rapidly cured under ultraviolet irradiation and is suitable for production processes that require rapid assembly. UV glue generally has high transparency and does not affect the light absorption of the battery sheet 10. UV glue has good chemical stability and is not easily affected by environmental factors, making it suitable for long-term use. Heat-curing glue is cured under heating conditions and has high strength after curing, making it suitable for applications that require high-strength connections. Heat-curing glue can maintain good adhesive properties in high-temperature environments and is suitable for use of solar panels under various temperature conditions. Heat-curing glue has good anti-aging properties and can maintain adhesion for a long time.

[0092] Therefore, the first adhesive 12 and the second adhesive 13 being UV glue or heat-curing glue can improve the production efficiency of the battery sheet assembly 100, while ensuring the stable fixation of the interconnection structure 11 on the battery sheet 10 and improving the overall performance of the battery sheet assembly 100.

[0093] According to some embodiments of the present application, as shown in Figure 8As shown, the interconnection structure 11 includes a base material 111 and a solder layer 112, which is arranged on the outer circumferential side of the base material 111, and at least part of the grid line 14 is embedded in the solder layer 112.

[0094] The base material 111 is the base material of the interconnection structure 11, which is usually a metal material (such as a copper strip, an aluminum strip, etc.), used to carry the solder layer 112 and provide a current transmission path. The solder layer 112 is arranged on the outer circumferential side of the base material 111, used to form an electrical connection with the grid line 14. The solder layer 112 is usually made of a material that is easy to solder (such as a tin-lead alloy, a lead-free solder, etc.). At least part of the grid line 14 is embedded in the solder layer 112, that is, the connection between the grid line 14 and the interconnection structure 11 is not a simple surface contact, but a closer combination through the solder layer 112.

[0095] Therefore, by embedding part of the grid line 14 in the solder layer 112, good electrical contact between the grid line 14 and the interconnection structure 11 can be ensured, the contact resistance is reduced, and the current transmission efficiency is improved. The solder layer 112 not only provides electrical connection, but also enhances the physical connection between the grid line 14 and the interconnection structure 11, making the entire battery sheet assembly 100 more stable and reducing the risk of loosening or breaking due to external force. The design of the solder layer 112 makes the connection between the grid line 14 and the interconnection structure 11 more reliable, and can maintain stable performance even in long-term use or harsh environments.

[0096] According to some embodiments of the present application, Figures 1-4 As shown, the connection grid line 17 and the interconnection structure 11 are both perpendicular to the grid line 14.

[0097] The interconnection structure 11 and the connection grid line 17 are perpendicular to the grid line 14, which can ensure uniform distribution of current on the battery sheet 10, reduce local current density, avoid hot spot effect, and improve overall current collection efficiency. The vertically arranged interconnection structure 11 and connection grid line 17 provide multiple low-resistance current transmission paths, reduce resistance loss, and improve the output power of the battery sheet 10.

[0098] The battery string according to the second aspect of the present application comprises the battery sheet assembly according to the first aspect of the present application.

[0099] The battery string comprises a plurality of battery sheet assemblies 100, as shown in Figure 5 and Figure 6As shown, the grid lines 14 on one side surface of the battery piece 10 in the battery piece assembly 100 along the thickness direction C are positive grid lines, and the grid lines 14 on the other side surface of the battery piece along the thickness direction C are negative grid lines. The interconnection structure 11 located on one side surface of the battery piece 10 along the thickness direction C is connected with the plurality of positive grid lines, and the interconnection structure 11 extends to the other side surface of the adjacent battery piece 10 along the thickness direction C and is connected with the negative grid lines on the adjacent battery piece 10, and the interconnection structure 11 located on the other side surface of the battery piece 10 along the thickness direction C is connected with the plurality of negative grid lines, and the interconnection structure 11 extends to the one side surface of the adjacent battery piece 10 along the thickness direction C and is connected with the positive grid lines on the adjacent battery piece 10, so that the series connection of the two battery pieces 10 is realized.

[0100] The battery string according to the embodiment of the present application can effectively improve the structural stability of the battery string, improve the current collection effect of the battery string, and further improve the overall performance of the battery string by applying the battery piece assembly 100 in the above embodiment.

[0101] The photovoltaic module according to the third aspect embodiment of the present application comprises the battery piece assembly according to the first aspect embodiment of the present application or the battery string according to the second aspect embodiment of the present application.

[0102] The photovoltaic module according to the embodiment of the present application can effectively improve the current collection efficiency of the photovoltaic module, enhance the structural stability and reliability, improve the processing convenience of the photovoltaic module, and ensure the stable operation of the photovoltaic module under various environments by applying the battery piece assembly 100 or the battery string in the above embodiment.

[0103] The photovoltaic power generation system according to the fourth aspect embodiment of the present application comprises the battery piece assembly according to the first aspect embodiment of the present application, the battery string according to the second aspect embodiment of the present application, or the photovoltaic module according to the third aspect embodiment of the present application.

[0104] The photovoltaic power generation system according to the embodiment of the present application can improve the overall performance and reliability of the photovoltaic power generation system by applying the battery piece assembly 100, the battery string or the photovoltaic module in the above embodiment, and the optimized layout of the interconnection structure 11 helps to ensure the stable operation of the photovoltaic power generation system under various environmental conditions.

[0105] In the description of the utility model, need understanding is, the term "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and so on the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawing, just is for the convenience of describing the utility model and simplifying the description, and not indicate or imply the device or element indicated must have a particular orientation, with a particular orientation configuration and operation, therefore can not be understood as the restriction of the utility model.

[0106] In the description of the utility model, "first feature", "second feature" can include one or more features.In the description of the utility model, "multiple" means two or more than two.In the description of the utility model, the first feature is "on" or "below" the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them.In the description of the utility model, the first feature is "on", "above" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is horizontally higher than the second feature.

[0107] In the description of the specification, the description of the reference terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example" 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 the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example.

[0108] Although the embodiments of the utility model have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the utility model, and the scope of the utility model is defined by the claims and its equivalents.

Claims

1. A battery cell assembly (100), characterized in that, include: A battery cell (10) is provided with a plurality of grid lines (14) and a plurality of connecting grid lines (17). The connecting grid lines (17) are located in the edge region of the battery cell (10) and / or the middle region of the battery cell (10). The connecting grid lines (17) intersect and are electrically connected to at least two adjacent grid lines (14). Multiple interconnecting structures (11) are arranged at intervals, the interconnecting structures (11) intersect and are electrically connected to multiple gate lines (14), the interconnecting structures (11) are electrically connected to the connecting gate lines (17) and / or the interconnecting structures (11) are electrically connected to the gate lines (14) connected to the connecting gate lines (17); A plurality of first adhesive members (12) are respectively disposed between the battery cell (10) and the plurality of interconnecting structures (11), the first adhesive members (12) being located at the connecting grid line (17), and the at least two adjacent grid lines (14) being adapted to be electrically connected to the corresponding interconnecting structure (11) through the connecting grid line (17).

2. The battery cell assembly (100) according to claim 1, characterized in that, The connecting grid line (17) includes a first connecting grid line (17) and a second connecting grid line (17) spaced apart along the extension direction of the grid line (14), and the interconnecting structure (11) and the first adhesive (12) are both disposed between the first connecting grid line (17) and the second connecting grid line (17).

3. The battery cell assembly (100) according to claim 2, characterized in that, The plurality of grid lines (14) include discontinuous grid lines (15) and continuous grid lines (16). The discontinuous grid lines (15) include a plurality of grid line (14) segments. Two adjacent grid line (14) segments are separated by the connecting grid lines (17). The two ends of the grid line (14) segments are respectively connected to the adjacent first connecting grid lines (17) and second connecting grid lines (17) of the two adjacent connecting grid lines (17), and the connecting grid lines (17) extend to the continuous grid lines (16). The first adhesive (12) is located between two adjacent continuous grid lines (16).

4. The battery cell assembly (100) according to claim 1, characterized in that, Multiple connecting grid lines (17) extend along the length direction of the interconnect structure (11), and multiple first adhesive members (12) are respectively disposed on the side of the multiple connecting grid lines (17) away from the battery cell (10).

5. The battery cell assembly (100) according to claim 1, characterized in that, The first adhesive member (12) is disposed between the connecting grid line (17) and the interconnecting structure member (11).

6. The battery cell assembly (100) according to claim 5, characterized in that, The first adhesive (12) is located between two adjacent grid lines (14).

7. The battery cell assembly (100) according to claim 1, characterized in that, The height of the interconnect structure (11) along the thickness direction of the battery cell (10) is greater than or equal to the height of the first adhesive (12) along the thickness direction of the battery cell (10).

8. The battery cell assembly (100) according to claim 1, characterized in that, Along the thickness direction of the battery cell (10), the distance between the side surface of the interconnecting structure (11) away from the battery cell (10) and the side surface of the battery cell (10) is H1. Along the thickness direction of the battery cell (10), the distance between the side surface of the first adhesive (12) away from the battery cell (10) and the side surface of the battery cell (10) is H2. H2 satisfies: 0.01mm≤H2≤H1.

9. The battery cell assembly (100) according to claim 1, characterized in that, The length of the first adhesive member (12) along the length direction of the interconnecting structure member (11) is L1, wherein L1 satisfies: 0.3mm ≤ L1 ≤ 3mm; and / or, The length of the first adhesive member (12) along the width direction of the interconnect structure member (11) is L2, and L2 satisfies: 0.3mm≤L2≤3mm.

10. The battery cell assembly (100) according to claim 1, characterized in that, Along the thickness direction of the battery cell (10), the distance between the side surface of the interconnect structure (11) away from the battery cell (10) and the side surface of the battery cell (10) is H1, and H1 satisfies: 0.1mm≤H1≤0.3mm.

11. The battery cell assembly (100) according to claim 1, characterized in that, At least a portion of the plurality of the first adhesive members (12) are disposed adjacent to at least one side edge of the battery cell (10) along the extension direction of the interconnect structure (11).

12. The battery cell assembly (100) according to claim 11, characterized in that, The battery cell (10) is provided with the first adhesive member (12) at both sides of the edge along the extension direction of the interconnect structure (11), and at least one first adhesive member (12) is provided between the first adhesive members (12) at both sides of the edge along the extension direction of the interconnect structure (11).

13. The solar cell assembly (100) according to any one of claims 1-12, characterized in that, Also includes: Multiple second adhesive members (13) are provided on the side of the interconnect structure (11) away from the battery cell (10), and the interconnect structure (11) is connected to the battery cell (10) through the second adhesive members (13).

14. The battery cell assembly (100) according to claim 13, characterized in that, The two ends of the second adhesive (13) extend along the extension direction of the interconnect structure (11) to the first adhesive (12) on both sides adjacent to the battery cell (10), and the second adhesive (13) is opposite to the interconnect structure (11) along the thickness direction of the battery cell (10).

15. The battery cell assembly (100) according to claim 13, characterized in that, The diameter of the interconnecting structure (11) is D. The second adhesive member (13) has a length L3 along the length direction of the grid line (14), wherein L3 satisfies: D≤L3≤3mm; and / or, The height of the second adhesive (13) along the thickness direction of the battery cell (10) is H3, and H3 satisfies: D≤H3≤0.4mm.

16. The battery cell assembly (100) according to claim 13, characterized in that, The diameter of the interconnecting structure (11) is D, and D satisfies: 0.1mm≤D≤0.3mm.

17. The battery cell assembly (100) according to claim 13, characterized in that, The number of interconnecting structural components (11) is N, where N satisfies: 10≤N≤30.

18. The battery cell assembly (100) according to claim 13, characterized in that, The first adhesive (12) is a UV adhesive or a thermosetting adhesive; and / or, The second adhesive (13) is a UV adhesive or a thermosetting adhesive.

19. The battery cell assembly (100) according to claim 13, characterized in that, The interconnection structure (11) includes: Substrate (111); A solder layer (112) is disposed on the outer periphery of the substrate (111), and at least a portion of the gate line (14) is embedded in the solder layer (112).

20. The battery cell assembly (100) according to claim 13, characterized in that, The connecting grid line (17) and the interconnecting structure (11) are both perpendicular to the grid line (14).

21. A battery string, characterized in that, Includes the cell assembly according to any one of claims 1-20.

22. A photovoltaic module, characterized in that, Includes the cell assembly according to any one of claims 1-20, or the cell string according to claim 21.

23. A photovoltaic power generation system, characterized in that, Includes the cell assembly according to any one of claims 1-20, the cell string according to claim 21, or the photovoltaic module according to claim 22.

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