Solar cell modules and battery components

Abstract

The present invention discloses a solar cell module and a battery assembly, wherein the solar cell module comprises a cell sheet and a conductive sheet. The cell sheet comprises a plurality of first grid lines and a plurality of second grid lines, and the conductive sheet comprises a first electrode wire, a second electrode wire, an electrical conduction structure, a first bus wire, a second bus wire and a third bus wire, wherein the first electrode wire is electrically connected to the first grid line, and the second electrode wire is electrically connected to the second grid line through the electrical conduction structure, and the first bus wire spans and is electrically connected to the plurality of first electrode wires corresponding to any grid line area, and the second bus wire spans and is electrically connected to the plurality of second electrode wires, and in any two adjacent grid line areas, the first bus wire corresponding to one grid line area is electrically connected to the second bus wire corresponding to the other grid line area through the third bus wire, and the conductive sheet can converge the electric energy generated by the cell sheet to transmit it to an external circuit without slicing the cell sheet.

Description

Technical Field

[0001] The present invention relates to the technical field of solar cells, and in particular to a solar cell module and a battery assembly. Background Art

[0002] like Figure 1 As shown, in the related art, the battery cell 2' is usually sliced, and then half of the battery cell 2' is flipped over, and the positive grid line 20' and the negative grid line 21' in the two battery cells 2' obtained by slicing are electrically connected through the wire 3', so as to realize the convergence of the electric energy generated by the solar cell formed by the battery cell 2', so that it can be converged and output to the external circuit.

[0003] However, when the cell 2' is sliced, hidden cracks may occur in the cell 2', which increases the scrap rate of the cell 2' and increases the manufacturing cost of the solar cell module 1'. Summary of the invention

[0004] One object of the present invention is to provide a solar cell module that can converge the electric energy generated by the battery cells to output to an external circuit without slicing the battery cells, thereby avoiding hidden cracks in the battery cells, and having a high yield rate of the battery cells and a low manufacturing cost of the solar cell module.

[0005] Another object of the present invention is to provide a battery assembly that, by providing the above-mentioned solar cell module, can output a larger voltage while reducing internal resistance loss and manufacturing costs.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] In a first aspect, a solar cell module is provided, comprising:

[0008] A battery cell, the battery cell comprising a substrate, the substrate having a plurality of gate line regions arranged in sequence, the gate line regions having first gate lines and second gate lines alternately arranged in sequence, and the first gate lines and the second gate lines in any two adjacent gate line regions being mirror-symmetrical; and

[0009] A conductive sheet, the conductive sheet is stacked on the gate line area, the conductive sheet includes an insulating main body, the main body has a first side and a second side opposite to each other, the first side is close to the gate line area, the first side corresponds to any one of the first gate lines and is provided with a first electrode wire electrically connected to the first gate line, the second side corresponds to any one of the second gate lines and is provided with a second electrode wire, and any corresponding second electrode wire is electrically connected to the second gate line through an electrical conduction structure;

[0010] Corresponding to any one of the gate line areas, the conductive sheet also includes a first bus wire and a second bus wire spaced apart from each other, the first bus wire spans across and is electrically connected to a plurality of the first electrode wires, and the second bus wire spans across and is electrically connected to a plurality of the second electrode wires; in any two adjacent gate line areas, the first bus wire corresponding to one of the gate line areas is electrically connected to the second bus wire corresponding to the other gate line area through a third bus wire.

[0011] As a preferred technical solution of the solar cell module, the first bus wire is connected to a side of the first electrode wire facing the second side.

[0012] As a preferred technical solution of the solar cell module, the main body is provided with a first arrangement groove penetrating along the thickness direction, and the electrical conduction structure is at least partially arranged in the first arrangement groove.

[0013] As a preferred technical solution for a solar cell module, the electrical conduction structure includes a plurality of conductive particles and a first conductive adhesive, the plurality of conductive particles are bonded to each other and electrically conductive through the first conductive adhesive, and the plurality of conductive particles are bonded to the groove wall of the first setting groove through the first conductive adhesive, and the first conductive adhesive is elastic.

[0014] As a preferred technical solution of the solar cell module, the main body has a first surface located on the first side, the first electrode wire at least partially protrudes from the first surface, and the protrusion height of the first electrode wire from the first surface is h1;

[0015] The electrical conduction structure has a connection end electrically connected to the second gate line, the connection end protrudes from the first surface, and the protrusion height of the connection end from the first surface is h2;

[0016] h2=h1, or h2>h1, and the electrical conduction structure has elasticity.

[0017] As a preferred technical solution of the solar cell module, the first side of the main body is provided with a first receiving groove, the first bus wire is at least partially arranged in the first receiving groove, and the first bus wire is connected to the side of the first electrode wire facing the second side; and / or,

[0018] The second bus wire is connected to the side of the second electrode wire facing away from the first side, or the second side of the main body is provided with a second setting groove, the second bus wire is at least partially arranged in the second setting groove, and the second bus wire is connected to the side of the second electrode wire facing the first side.

[0019] As a preferred technical solution of the solar cell module, the first bus wire is electrically connected between two ends of the corresponding plurality of first electrode wires, and the second bus wire is electrically connected between two ends of the corresponding plurality of second electrode wires.

[0020] As a preferred technical solution of the solar cell module, the first bus wire is electrically connected to the middle parts of the first electrode wires in the length direction in sequence; and / or,

[0021] The second bus wire is electrically connected to the middle parts of the plurality of second electrode wires in the length direction in sequence.

[0022] As a preferred technical solution of the solar cell module, the main body is further provided with a third arrangement groove extending along the thickness direction, and the third bus wire is at least partially arranged in the third arrangement groove; and\or,

[0023] The first electrode wire is electrically connected and bonded to the corresponding first gate line through a second conductive adhesive, and the electrical conduction structure is electrically connected and bonded to the corresponding second gate line through a third conductive adhesive.

[0024] In a second aspect, a battery assembly is provided, comprising a first encapsulation layer, a second encapsulation layer, a first encapsulation board, a second encapsulation board and the solar cell module as described in the first aspect, wherein the first encapsulation layer covers the side of the substrate facing away from the conductive sheet, the first encapsulation board is stacked on the side of the first encapsulation layer facing away from the substrate, the second encapsulation layer covers the side of the conductive sheet facing away from the battery cell, and the second encapsulation board is stacked on the side of the second encapsulation layer facing away from the conductive sheet.

[0025] The beneficial effects of the present invention are:

[0026] By making the first bus wire span across and electrically connected to multiple first electrode wires, so that the first bus wire spans across and is electrically conductive to multiple first grid lines in the corresponding grid line area, and making the second bus wire span across and electrically connected to multiple second electrode wires, so that the second bus wire spans across and is electrically conductive to multiple second grid lines in the corresponding grid line area, and then by electrically connecting the first bus wire and the adjacent second bus wire through the third bus wire along the sequential arrangement direction of the multiple grid line areas, the first bus wire, the third bus wire and the second bus wire are connected in sequence to form a conductive part, so that the conductive part is a structure spanning two adjacent grid line areas, so that the solar cells in the two adjacent grid line areas can be connected in series. In other words, the electric energy generated by the solar cells in the two adjacent grid line areas can be converged through the conductive part, so that the electric energy generated by the battery cell can be converged through the conductive sheet to be output to the external circuit. At the same time, there is no need to slice the battery cell, which can avoid hidden cracks in the battery cell. The yield rate of the battery cell is high and the manufacturing cost of the solar cell module is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention is further described in detail below based on the accompanying drawings and embodiments.

[0028] Figure 1 A schematic diagram of the manufacturing process of a solar cell module provided by the prior art.

[0029] Figure 2 It is a bottom view schematic diagram of the structure of the solar cell module described in the embodiment.

[0030] Figure 3 for Figure 2 AA section view.

[0031] Figure 4 for Figure 2 Middle BB section view.

[0032] Figure 5 It is a bottom view schematic diagram of the structure of the battery cell described in the embodiment.

[0033] Figure 6 It is a schematic top view of the structure of the conductive sheet described in the embodiment.

[0034] Figure 7 It is a schematic diagram of the three-dimensional structure of the conductive sheet described in the embodiment.

[0035] Figure 8 It is a schematic cross-sectional view of a local structure of the conductive sheet (the first electrode wire and the electrical conductive structure are both protruding from the first surface) described in the embodiment.

[0036] Fig. 9 It is a schematic cross-sectional view of the structure of the battery assembly described in the embodiment.

[0037] Figure 1 middle:

[0038] 1', solar cell module;

[0039] 2', battery cell; 20', positive electrode grid line; 21', negative electrode grid line;

[0040] 3', conductor;

[0041] Figures 2 to 9 middle:

[0042] 1. Solar cell module;

[0043] 2. Cell; 20. Substrate; 200. Gate line area; 21. First gate line; 22. Second gate line;

[0044] 3. Conductive sheet; 30. Main body; 30a. First side; 30b. Second side; 30c. Third side; 30d. Fourth side; 300. First setting groove; 301. First surface; 302. Second surface; 303. Second setting groove; 304. Third setting groove; 31. First electrode wire; 310. First middle part; 311. Second receiving groove; 32. Second electrode wire; 320. Second middle part; 33. Electrical conduction structure; 330. Connection end; 34. First bus wire; 340. First receiving groove; 35. Second bus wire; 36. Third bus wire; 3a. Conductive part;

[0045] 4. Battery assembly; 40. First packaging layer; 41. Second packaging layer; 42. First packaging board; 43. Second packaging board. DETAILED DESCRIPTION

[0046] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0047] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0049] like Figures 2 to 5 As shown, the first aspect of the present invention provides a solar cell module 1, comprising a cell sheet 2 and a conductive sheet 3. The cell sheet 2 comprises a substrate 20, on which a plurality of gridline regions 200 are arranged in sequence, along the arrangement direction S1 of the plurality of gridline regions 200, first gridlines 21 and second gridlines 22 are alternately arranged in sequence in each gridline region 200, the first gridlines 21 and the second gridlines 22 in any two adjacent gridline regions 200 are mirror-symmetrical, one of the first gridline 21 and the second gridline 22 is a positive gridline, and the other is a negative gridline, the conductive sheet 3 is stacked on the gridline region 200, the conductive sheet 3 comprises an insulated main body 30, a plurality of first electrode wires 31, a plurality of second electrode wires 32, a plurality of electrical conduction structures 33, a plurality of first bus wires 34, a plurality of second bus wires 35 and a third bus wire 36, along the thickness direction S2 of the main body 30, the main body 30 has an opposite first side 30a (see Figure 7 ) and the second side 30b (see Figure 7 ), the first side 30a is close to the first gate line 21 and the second gate line 22, a plurality of first electrode wires 31 are respectively arranged on the first side 30a corresponding to the plurality of first gate lines 21, the first electrode wires 31 are electrically connected to the corresponding first gate lines 21, a plurality of second electrode wires 32 are respectively arranged on the second side 30b corresponding to the plurality of second gate lines 22, a plurality of electrical conduction structures 33 are arrayed on the main body 30, and any corresponding second electrode wire 32 is electrically conductive with the second gate line 22 through the electrical conduction structure 33, corresponding to any one gate line area 200, the conductive sheet 3 also includes a first bus wire 34 and a second bus wire 35 spaced apart, the first bus wire 34 spans over and is electrically connected to the plurality of first electrode wires 31, and the second bus wire 35 spans over and is electrically connected to the plurality of second electrode wires 32, in any two adjacent gate line areas 200, the first bus wire 34 corresponding to one gate line area 200 is electrically connected to the second bus wire 35 corresponding to another gate line area 200 through a third bus wire 36. In order to facilitate observation of the array arrangement example of the electrical conduction structure 33, Figure 2The dotted line in FIG. 3 shows the electrical conduction structure 33 blocked by the first electrode wire 31, and in order to distinguish the first gate line 21 from the second gate line 22, Figure 5 The first grid lines 21 are filled with discontinuous line patterns, and the second grid lines 22 are filled with lattice line patterns.

[0050] It can be understood that the cell 2 is a back-contact solar cell, that is, the cell 2 is provided with a first gate line 21 and a second gate line 22 and is in contact with a conductive sheet 3 on the back side, so that the conductive sheet 3 is connected to the cell 2, so that the electric energy generated in the cell 2 is converged to the external circuit through the conductive sheet 3, and the gate line area 200 is a three-dimensional area located on one side of the substrate 20, so that the first gate line 21 and the second gate line 22 are both located as a whole in the gate line area 200.

[0051] By making the first bus wire 34 cross over and electrically connect to the plurality of first electrode wires 31, so that the first bus wire 34 crosses over and electrically conducts to the plurality of first grid lines 21 in the corresponding grid line area 200, and making the second bus wire 35 cross over and electrically connect to the plurality of second electrode wires 32, so that the second bus wire 35 crosses over and electrically conducts to the plurality of second grid lines 22 in the corresponding grid line area 200, and then by making the first bus wire 34 and the adjacent second bus wire 35 electrically connected through the third bus wire 36 along the arrangement direction S1, the solar cells in the two adjacent grid line areas 200 can be connected in series. In other words, the solar cells in the two adjacent grid line areas 200 can be connected in series through the first bus wire 3 4. The third bus conductor 36 and the second bus conductor 35 are electrically connected in sequence to converge the electric energy generated by the solar cells in the two adjacent grid line areas 200, so that the electric energy generated by the battery cell 2 can be converged through the conductive sheet 3 to be output to the external circuit. At the same time, the total output voltage of the solar cell module 1 can be increased, and there is no need to slice the battery cell 2 to make the circuit of the solar cell module 1 equivalent to a circuit in which multiple solar cells are connected in parallel, so as to reduce the resistance loss inside the solar cell module 1 and avoid hidden cracks in the battery cell 2. The yield rate of the battery cell 2 is high and the manufacturing cost of the solar cell module 1 is low.

[0052] Optionally, the solar cell module 1 may further include a conductive portion 3a, which includes a first bus wire 34, a third bus wire 36 and a second bus wire 35 connected in sequence. In other words, the conductive portion 3a may be an integral structure spanning two adjacent grid line areas 200, so as to realize the convergence of electric energy generated by the solar cells in the two adjacent grid line areas 200 through the conductive portion 3a.

[0053] In order to increase the output voltage of the solar cell module while reducing the resistance loss inside the solar cell module, the related technology also usually adopts a method of connecting a plurality of series-connected battery groups formed by connecting some positive grid lines and some negative grid lines in sliced ​​battery cells in series, and then connecting them in parallel to reduce the resistance loss inside the solar cell module.

[0054] By making the first bus wire 34 span across and electrically connected to the multiple first electrode wires 31, so that the first bus wire 34 spans across and is electrically conductive to the multiple first grid lines 21 in the corresponding grid line area 200, it is equivalent to connecting the multiple first grid lines 21 corresponding to the same grid line area 200 in parallel and electrically conductive to the first bus wire 34, and making the second bus wire 35 span across and electrically connected to the multiple second electrode wires 32, so that the second bus wire 35 spans across and is electrically conductive to the multiple second grid lines 22 in the corresponding grid line area 200, which is equivalent to connecting the multiple second grid lines 22 corresponding to the same grid line area 200 in parallel and electrically conductive to the second bus wire 35, thereby reducing the internal resistance of the solar cell module 1 provided in this embodiment, so as to reduce the resistance loss inside the solar cell module 1.

[0055] In addition, by making the first gate line 21 and the second gate line 22 in any two adjacent gate line areas 200 mirror-symmetrical, it is possible to provide two adjacent first gate lines 21 or two adjacent second gate lines 22 at adjacent locations of any two adjacent gate line areas 200. In other words, two gate lines of the same polarity are arranged at adjacent locations of any two adjacent gate line areas 200, thereby preventing current from being directly generated between the gate lines between the two adjacent gate line areas 200, so as to prevent a short circuit from occurring between the two adjacent gate line areas 200 when the solar cells located in the two adjacent gate line areas 200 are connected in series via the first bus wire 34 and the second bus wire 35.

[0056] In order to simplify the bus circuit of the solar cell module, optionally, the first bus wire 34 can be electrically connected to the second bus wire 35 located on one side only through the third bus wire 36. For example, along the arrangement direction S1 of the multiple first electrode wires 31, the main body 30 has a relative third side 30c and a fourth side 30d. Among the two first bus wires 34 and two second bus wires 35 corresponding to any two adjacent gate line areas 200, the first bus wire 34 close to the third side 30c and the second bus wire 35 close to the fourth side 30d are electrically connected through the third bus wire 36.

[0057] It can be understood that the second bus conductor 35 closest to the third side 30c and the first bus conductor 34 closest to the fourth side 30d are used to be electrically connected to an external circuit to transmit the electric energy generated by the solar cell module 1 to the external circuit. At this time, optionally, the first bus conductor 34 closest to the fourth side 30d can extend in a direction away from the third side 30c to protrude from the main body 30, and the second bus conductor 35 closest to the third side 30c can extend in a direction away from the fourth side 30d to protrude from the main body 30, so that the first bus conductor 34 and the second bus conductor 35 are electrically connected to the external circuit.

[0058] Optionally, any adjacent gate lines can be directly connected, or can be arranged at intervals, and the gaps between adjacent gate lines can be filled with silicon material, so that the adjacent gate lines can be electrically conductive, and the silicon material itself can also generate current under the action of light, thereby not affecting the power generation efficiency of the battery cell 2.

[0059] The “any adjacent gate lines” include: any adjacent first gate line 21 and second gate line 22 , any adjacent two first gate lines 21 , and any adjacent two second gate lines 22 .

[0060] Optionally, the surface of the substrate 20 facing the conductive sheet 3 where the first grid line 21 and the second grid line 22 are not provided may be covered with silicon material (not numbered in the figure) to increase the effective solar power generation area of ​​the cell 2 and make the power generation efficiency of the cell 2 higher.

[0061] Optionally, the main body 30 may be a sheet-like insulating material with a certain structural strength, such as a PET (polyethylene glycol terephthalate) sheet, a PP (polypropylene) sheet, etc., so as to facilitate the arrangement of a first electrode wire 31, a second electrode wire 32, an electrical conduction structure 33, a first bus wire 34 and a second bus wire 35 on the main body 30, and facilitate the stacking of the conductive sheet 3 on the battery cell 2 as a whole.

[0062] The first bus wire 34 can be electrically connected to the ends of the corresponding multiple first electrode wires 31, or can be electrically connected between the two ends of the corresponding multiple first electrode wires 31, and the second bus wire 35 can be electrically connected to the ends of the multiple second electrode wires 32, or can be electrically connected between the two ends of the multiple second electrode wires 32.

[0063] Optionally, the first bus conductor 34 spans across and is electrically connected between the two ends of the corresponding multiple first electrode conductors 31, so that the first bus conductor 34 spans across and is electrically conductive between the two ends of the multiple first grid lines 21 in the corresponding grid line area 200, which is equivalent to connecting the two ends of the first grid lines 21 in parallel and electrically conductive to the first bus conductor 34. In other words, it is equivalent to dividing the multiple first grid lines 21 corresponding to the same grid line area 200 into two sections, and connecting the two sections of each first grid line 21 in parallel through the first bus conductor 34, thereby further reducing the internal resistance of the solar cell module 1, so as to further reduce the resistance loss inside the solar cell module 1.

[0064] Optionally, the second bus conductor 35 spans across and is electrically connected between the two ends of the plurality of second electrode conductors 32, so that the second bus conductor 35 spans across and is electrically conductive between the two ends of the plurality of second grid lines 22 in the corresponding grid line area 200, which is equivalent to dividing the plurality of second grid lines 22 corresponding to the same grid line area 200 into two sections, and connecting the two sections of each second grid line 22 in parallel through the second bus conductor 35, thereby further reducing the internal resistance of the solar cell module 1, so as to further reduce the resistance loss inside the solar cell module 1.

[0065] Preferably, the first bus conductor 34 can be made to cross over and be electrically connected between the two ends of the corresponding multiple first electrode conductors 31, and at the same time, the second bus conductor 35 can be made to cross over and be electrically connected between the two ends of the multiple second electrode conductors 32, so as to further reduce the internal resistance of the solar cell module 1, thereby further reducing the resistance loss inside the solar cell module 1.

[0066] Please combine Figure 6 and Figure 7 As shown, it can be understood that when the first grid line 21 is divided into two sections and the two sections of each first grid line 21 are connected in parallel through the first bus wire 34, compared with the circuit formed by dividing the first grid line 21 into two sections of different lengths and connecting them in parallel, the internal resistance reduction effect of the circuit formed by dividing the first grid line 21 into two sections of the same length and connecting them in parallel is better, and since the first grid line 21 corresponds to the first electrode wire 31, the middle part of the first grid line 21 also corresponds to the middle part of the first electrode wire 31. Based on this, preferably, the first electrode wire 31 has a middle part along its length direction (that is, as shown in FIG. Figure 6 and Figure 7The first bus conductor 34 is electrically connected to the first middle portions 310 of the plurality of first electrode conductors 31 in sequence, so that the first bus conductor 34 can be electrically conductive to the first middle portions 310 of the first electrode conductors 31, and electrically conductive to the middle portions of the first grid lines 21, so that the circuit of the solar cell module 1 is equivalent to dividing the plurality of first grid lines 21 corresponding to the same grid line area 200 into two sections of approximately equal length, and connecting the two sections of approximately equal length of each first grid line 21 in parallel through the first bus conductor 34, so that the internal resistance of the solar cell module 1 is better reduced.

[0067] It can be understood that when the second grid line 22 is divided into two sections and the two sections of each second grid line 22 are connected in parallel through the second bus wire 35, the internal resistance reduction effect of the circuit formed by dividing the second grid line 22 into two sections of the same length and connecting them in parallel is better than that of the circuit formed by dividing the second grid line 22 into two sections of different lengths and connecting them in parallel. In addition, since the second grid line 22 corresponds to the second electrode wire 32, the middle part of the second grid line 22 also corresponds to the middle part of the second electrode wire 32. Based on this, preferably, the second electrode wire 32 has a middle part along its length direction (that is, as shown in FIG. 1 ). Figure 7 The second bus conductor 35 is electrically connected to the second middle portions 320 of the plurality of second electrode conductors 32 in sequence, so that the second bus conductor 35 can be electrically connected to the second middle portions 320 of the second electrode conductors 32, and electrically connected to the middle portion of the second grid line 22, so that the circuit of the solar cell module 1 is equivalent to dividing the plurality of second grid lines 22 corresponding to the same grid line area 200 into two sections of approximately equal length, and connecting the two sections of approximately equal length of each second grid line 22 in parallel through the second bus conductor 35, so that the internal resistance reduction effect of the solar cell module 1 is better. Among them, for the convenience of observation, Figure 7 The blocked second electrode conductor 32 is shown with a dotted line, the blocked second bus conductor 35 is shown with a bold dotted line, and the first bus conductor 34 is shown with a bold solid line. At the same time, the size of the main body 30 along the thickness direction S2 is made larger to reduce the blocking of the first bus conductor 34, the electrical conduction structure 33, the second electrode conductor 32 and the second bus conductor 35. The actual size of the conductive sheet 3 along the thickness direction S2 can be smaller.

[0068] More preferably, the first bus wire 34 can be electrically connected to the first middle portions 310 of the plurality of first electrode wires 31 in sequence, and the second bus wire 35 can be electrically connected to the second middle portions 320 of the plurality of second electrode wires 32 in sequence, thereby further improving the internal resistance reduction effect of the solar cell module 1.

[0069] like Figure 3 , Figure 4 and Figure 7 As shown, optionally, the first bus wire 34 is connected to the side of the first electrode wire 31 facing the second side 30b, so as to avoid the first bus wire 34 directly contacting the battery cell 2 and avoiding the first bus wire 34 directly contacting the second gate line 22 to cause a short circuit in the battery cell 2.

[0070] Exemplarily, the main body 30 has a first surface 301 located on the first side 30a, and a first receiving groove 340 can be opened on the first surface 301, and the first bus wire 34 is at least partially arranged in the first receiving groove 340, and then the first bus wire 34 is arranged on the side of the first bus wire 34 facing the battery cell 2, so as to realize that the first bus wire 34 is connected to the side of the first electrode wire 31 facing the second side 30b.

[0071] Specifically, the first bus bar 34 can be clamped in the first receiving groove 340 , or can be bonded to the groove wall of the first receiving groove 340 .

[0072] Optionally, the first bus wire 34 is entirely located in the first receiving groove 340. In other words, the first bus wire 34 does not protrude from the first surface 301, thereby preventing the first bus wire 34 from directly contacting the battery cell 2 and preventing the first bus wire 34 from directly contacting the second grid line 22 and causing a short circuit in the battery cell 2.

[0073] Optionally, the first electrode wire 31 may be disposed on the first surface 301 and the first bus wire 34 corresponding to the first gate line 21 , so that the first electrode wire 31 is disposed in a simple manner.

[0074] In other embodiments, a second receiving groove 311 connected to the first receiving groove 340 may be opened on the first surface 301 , and the first electrode wire 31 may be at least partially disposed in the second receiving groove 311 to electrically connect the first electrode wire 31 to the first bus wire 34 .

[0075] Optionally, the main body 30 is provided with a first setting groove 300 extending through the thickness direction S2, and the electrical conductive structure 33 is at least partially provided in the first setting groove 300, so that the electrical conductive structure 33 can be electrically connected between the second grid line 22 located on the first side 30a and the second bus wire 35 located on the second side 30b.

[0076] Optionally, there are multiple electrical conductive structures 33 electrically connected between a pair of corresponding second electrode wires 32 and the second gate lines 22, so that the flow area between the corresponding second electrode wires 32 and the second gate lines 22 can be increased by increasing the number of electrical conductive structures 33, thereby reducing the resistance loss between the corresponding second electrode wires 32 and the second gate lines 22.

[0077] Optionally, the electrically conductive structure 33 includes a plurality of conductive particles (not shown in the figure) and a first conductive adhesive (not shown in the figure), the plurality of conductive particles are bonded to each other and electrically conductive by the first conductive adhesive, and the plurality of conductive particles are bonded to the groove wall of the first setting groove 300 by the first conductive adhesive, so that the electrically conductive structure 33 has good conductivity and the connection between the electrically conductive structure 33 and the main body 30 is stable.

[0078] Please combine Figure 8 As shown, optionally, the first electrode wire 31 at least partially protrudes from the first surface 301 , so that when the conductive sheet 3 is stacked on the battery sheet 2 , the first electrode wire 31 is easy to abut against the first gate line 21 , so that the first electrode wire 31 can be electrically connected to the first gate line 21 .

[0079] At this time, in order to make the conductive structure 33 easily abut against the second gate line 22 so as to be electrically connected to the second gate line 22 , the conductive structure 33 optionally has a connection end 330 electrically connected to the second gate line 22 , and the connection end 330 protrudes from the first surface 301 .

[0080] The protruding height of the first electrode wire 31 protruding from the first surface 301 is h1, and the protruding height of the connecting end 330 protruding from the first surface 301 is h2, wherein the units of the height h1 and the height h2 are the same. Optionally, h2=h1. In other words, the connecting end 330 is flush with the side of the first electrode wire 31 facing away from the first surface 301, so that the connecting end 330 and the first electrode can easily abut against the surface of the battery cell 2 at the same time, thereby making it easy to electrically connect the connecting end 330 to the second gate line 22 while electrically connecting the first electrode wire 31 to the first gate line 21.

[0081] Alternatively, h2>h1, and the electrically conductive structure 33 is elastic, so that by abutting the conductive sheet 3 against the battery sheet 2, the electrically conductive structure 33 can abut against the second gate line 22 and undergo elastic deformation, thereby simultaneously abutting the first electrode wire 31 against the first gate line 21. At this time, the precision requirement for the protruding height of the electrically conductive structure 33 protruding from the first surface 301 is relatively low, which can reduce the manufacturing difficulty of the conductive sheet 3.

[0082] As in the above technical solution, when the electrical conductive structure 33 includes a plurality of conductive particles and a first conductive adhesive, optionally, the first conductive adhesive has elasticity, thereby enabling the electrical conductive structure 33 to have elasticity.

[0083] Optionally, the first electrode wire 31 and the corresponding first grid line 21 are electrically connected and bonded to each other via a second conductive adhesive (not shown in the figure), and the electrical conduction structure 33 and the corresponding second grid line 22 are electrically connected and bonded to each other via a third conductive adhesive (not shown in the figure), thereby making it possible to make the relative positions of the first electrode wire 31 and the corresponding first grid line 21, and the electrical conduction structure 33 and the corresponding second grid line 22 more stable without affecting the electrical connection between the first electrode wire 31 and the corresponding first grid line 21, and the electrical conduction structure 33 and the corresponding second grid line 22, thereby improving the stability of the use of the solar cell.

[0084] Furthermore, the third conductive adhesive is spaced apart from the second conductive adhesive, thereby preventing the adjacent first gate line 21 and second gate line 22 from being electrically connected via the third conductive adhesive and the second conductive adhesive, thereby preventing a short circuit from occurring.

[0085] like Figure 3 , Figure 4 and Figure 7 As shown, optionally, a second setting groove 303 is opened on the second side 30b of the main body 30, and the second bus wire 35 is at least partially set in the second setting groove 303, so that the effective connection area between the second bus wire 35 and the main body 30 is larger, which can make the connection stability between the second bus wire 35 and the main body 30 better.

[0086] Specifically, the second bus bar 35 can be clamped in the second arrangement groove 303 , or can be bonded to the groove wall of the second arrangement groove 303 .

[0087] In other embodiments, the second bus conductor 35 may also be disposed on the second surface 302 , thereby eliminating the need to open the second disposition groove 303 on the second surface 302 , thereby simplifying the manufacturing process of the conductive sheet 3 .

[0088] Please combine Figure 8 As shown, optionally, the second bus wire 35 is connected to the side of the second electrode wire 32 facing the first side 30a (eg Figure 3 Alternatively, the second bus wire 35 is connected to the side of the second electrode wire 32 away from the first side 30a (as shown in Figure 8 shown).

[0089] Optionally, the main body 30 is further provided with a third arrangement groove 304 extending along the thickness direction S2, and the third bus wire 36 is at least partially arranged in the third arrangement groove 304, wherein, for the convenience of observation, Figure 7 The structure of the third busbar 36 which is shielded is shown by the thick dotted line in FIG.

[0090] Optionally, the first bus wire 34, the third bus wire 36 and the second bus wire 35 which are electrically connected in sequence may be formed as one body. In other words, the conductive portion 3a may be an inseparable structure. For example, the first bus wire 34, the third bus wire 36 and the second bus wire 35 may be three sequentially connected parts of a wire. In this case, the conductive portion 3a is a wire, or the first bus wire 34, the third bus wire 36 and the second bus wire 35 may be fixedly connected to form a whole body by welding, bonding or the like.

[0091] like Fig. 9 As shown, the second aspect of the present invention provides a battery assembly 4, including a first encapsulation layer 40, a second encapsulation layer 41, a first encapsulation board 42, a second encapsulation board 43 and a solar cell module 1 as provided in the above technical solution, wherein the first encapsulation layer 40 covers the substrate 20 (see Figure 3 ) on the side away from the conductive sheet 3, the first packaging board 42 is stacked on the side of the first packaging layer 40 away from the substrate 20, the second packaging layer 41 covers the side of the conductive sheet 3 away from the battery cell 2, and the second packaging board 43 is stacked on the side of the second packaging layer 41 away from the conductive sheet 3. By setting the above-mentioned solar cell module 1, the battery assembly 4 can output a larger voltage while reducing internal resistance loss and reducing manufacturing costs.

[0092] In addition, by clamping the first packaging plate 42 and the second packaging plate 43 on two opposite sides of the solar cell module 1, the overall structural strength of the battery assembly 4 can be improved, and the solar cell module 1 can be protected, thereby reducing the possibility of damage to the solar cell module 1 due to bumps.

[0093] Optionally, the first packaging layer 40 may be formed by curing packaging glue, so that the first packaging layer 40 can not only realize the packaging function of the side of the substrate 20 facing away from the conductive sheet 3 , but also bond the first packaging board 42 to the substrate 20 .

[0094] Preferably, the first packaging layer 40 and the first packaging plate 42 may both be made of transparent materials, thereby reducing light loss when passing through the first packaging layer 40 and the first packaging plate 42 , thereby improving the power generation efficiency of the solar cell 2 .

[0095] Optionally, the second encapsulation layer 41 may be formed by curing the encapsulation glue, so that the second encapsulation layer 41 can not only realize the encapsulation function of the side of the conductive sheet 3 facing away from the battery sheet 2 , but also can bond the second encapsulation board 43 to the conductive sheet 3 .

[0096] In the description herein, it should be understood that the terms "upper", "lower", "left", "right", etc., and the like, are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0097] In the description of this specification, the description with reference to the terms "an embodiment", "example", etc. 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 present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0098] In addition, it should be understood that although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0099] The technical principle of the present invention is described above in conjunction with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanations herein, those skilled in the art can associate other specific implementations of the present invention without paying creative labor, and these methods will fall within the scope of protection of the present invention.

Claims

1. A solar cell module, characterized in that ,include: A battery cell, the battery cell comprising a substrate, the substrate having a plurality of gate line areas arranged in sequence, the gate line areas having first gate lines and second gate lines arranged alternately in sequence, the first gate lines and the second gate lines in any two adjacent gate line areas being mirror-symmetrical, so that two gate lines of the same polarity are arranged adjacent to any two adjacent gate line areas; and A conductive sheet, the conductive sheet is stacked on the gate line area, the conductive sheet includes an insulating main body, the main body has a first side and a second side opposite to each other, the first side is close to the gate line area, the first side corresponds to any one of the first gate lines and is provided with a first electrode wire electrically connected to the first gate line, the second side corresponds to any one of the second gate lines and is provided with a second electrode wire, and any corresponding second electrode wire is electrically connected to the second gate line through an electrical conduction structure; Corresponding to any of the gate line areas, the conductive sheet further comprises a first bus wire and a second bus wire spaced apart from each other, the first bus wire spans across and is electrically connected to a plurality of the first electrode wires, and the second bus wire spans across and is electrically connected to a plurality of the second electrode wires; in any two adjacent gate line areas, the first bus wire corresponding to one of the gate line areas is electrically connected to the second bus wire corresponding to the other of the gate line areas through a third bus wire; The first bus wire is connected to a side of the first electrode wire facing the second side; The main body is provided with a first arrangement groove which penetrates along the thickness direction, and the electrical conduction structure is at least partially arranged in the first arrangement groove.

2. The solar cell module according to claim 1, characterized in that: The electrical conduction structure includes a plurality of conductive particles and a first conductive adhesive. The plurality of conductive particles are bonded to each other and electrically conductive by the first conductive adhesive. Furthermore, the plurality of conductive particles are bonded to the groove wall of the first setting groove by the first conductive adhesive. The first conductive adhesive is elastic.

3. The solar cell module according to claim 1, characterized in that: The main body has a first surface located on the first side, the first electrode wire at least partially protrudes from the first surface, and the protrusion height of the first electrode wire from the first surface is h1; The electrical conduction structure has a connection end electrically connected to the second gate line, the connection end protrudes from the first surface, and the protrusion height of the connection end from the first surface is h2; h2=h1, or h2>h1, and the electrical conduction structure has elasticity.

4. The solar cell module according to claim 1, characterized in that: A first receiving groove is formed on the first side of the main body, the first bus wire is at least partially disposed in the first receiving groove, and the first bus wire is connected to a side of the first electrode wire facing the second side; and / or, The second bus wire is connected to the side of the second electrode wire facing away from the first side, or the second side of the main body is provided with a second setting groove, the second bus wire is at least partially arranged in the second setting groove, and the second bus wire is connected to the side of the second electrode wire facing the first side.

5. The solar cell module according to any one of claims 1 to 4, characterized in that: The first bus wire is electrically connected between two ends of the corresponding plurality of first electrode wires, and the second bus wire is electrically connected between two ends of the corresponding plurality of second electrode wires.

6. The solar cell module according to claim 5, characterized in that: The first bus wire is electrically connected to the middle parts of the first electrode wires in the length direction in sequence; and / or, The second bus wire is electrically connected to the middle parts of the plurality of second electrode wires in the length direction in sequence.

7. The solar cell module according to any one of claims 1 to 4, characterized in that: The main body is further provided with a third arrangement groove extending along the thickness direction, and the third bus wire is at least partially arranged in the third arrangement groove; and\or, The first electrode wire is electrically connected and bonded to the corresponding first gate line through a second conductive adhesive, and the electrical conduction structure is electrically connected and bonded to the corresponding second gate line through a third conductive adhesive.

8. A battery assembly, characterized in that: The solar cell module comprises a first encapsulation layer, a second encapsulation layer, a first encapsulation board, a second encapsulation board and any one of claims 1 to 7, wherein the first encapsulation layer covers the side of the substrate facing away from the conductive sheet, the first encapsulation board is stacked on the side of the first encapsulation layer facing away from the substrate, the second encapsulation layer covers the side of the conductive sheet facing away from the solar cell, and the second encapsulation board is stacked on the side of the second encapsulation layer facing away from the conductive sheet.

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