Photovoltaic panels and photovoltaic systems

Abstract

The utility model discloses a photovoltaic module and a photovoltaic system. The photovoltaic module includes a cell and an interconnection member. The cell includes a plurality of fine grid electrodes extending in a second direction and arranged at intervals in a first direction. The fine grid electrodes are electrically connected to the interconnection member extending in the first direction. The first direction intersects with the second direction. The fine grid electrodes overlap with the interconnection member. Along the thickness direction of the cell, at the overlapping position of the fine grid electrodes and the interconnection member, there is a spacer between the interconnection member and the fine grid electrodes, or the interconnection member contacts the fine grid electrodes and is not welded. Or, there is a conductive reinforcement portion between the fine grid electrode and the interconnection member. In the embodiment of the utility model, when the interconnection member is welded to the cell, there is a spacer or reinforcement portion between the interconnection member and the fine grid electrode, thereby reducing the risk of the fine grid electrode being welded off during welding, reducing current loss, and improving the conversion efficiency of the cell.

Description

Technical Field

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

[0002] The gate electrode and pad of the back-contact battery are all arranged on the back side. The gate electrode collects the current and converges the current to the pad, and the pad conducts the current through the soldering tape.

[0003] However, when the welding ribbon is welded to a back-contact battery without a main grid, the welding ribbon will come into contact with a fine grid of the same polarity. The high temperature during welding may cause the fine grid to be at risk of being welded off, and the risk of the fine grid being welded off is aggravated by the downward pressure of the ejector pin during welding. Utility Model Content

[0004] The utility model provides a photovoltaic component and a photovoltaic system, aiming to solve the technical problem of the risk of welding off of fine grids in the prior art.

[0005] In a first aspect, an embodiment of the utility model provides a photovoltaic module, including a cell and an interconnection member, wherein the cell includes a plurality of fine grid electrodes extending along a second direction and arranged at intervals in a first direction; the fine grid electrodes are electrically connected to the interconnection member extending along the first direction; the first direction intersects with the second direction;

[0006] The fine gate electrode overlaps the interconnection member;

[0007] Along the thickness direction of the cell, at the overlapping position of the fine gate electrode and the interconnection member, there is a spacer between the interconnection member and the fine gate electrode, or the interconnection member is in contact with the fine gate electrode without being welded;

[0008] Alternatively, a conductive reinforcement portion is provided between the fine gate electrode and the interconnection member.

[0009] Optionally, the cell is a busbar-less cell, and / or the cell is a back-contact cell.

[0010] Optionally, along the first direction, a spacer is disposed on the upper side and / or the lower side of the fine gate electrode.

[0011] Optionally, the spacer is an insulating spacer, and / or the height of the spacer is greater than the height of the fine gate electrode.

[0012] Optionally, an insulating block is provided between the interconnection member and the fine gate electrode, and the spacer between the interconnection member and the fine gate electrode includes the insulating block.

[0013] Optionally, the fine gate electrode is electrically connected to the interconnection member via a connection portion; along the first direction, the connection portion includes edge connection portions close to both side edges of the battery cell;

[0014] Along the first direction, a horizontal rectangular insulating block, a vertical rectangular insulating block, or a combination of a horizontal rectangular insulating block and a vertical rectangular insulating block is disposed on one side of the edge connecting portion close to the edge of the battery cell.

[0015] Optionally, the width of the insulating block is greater than or equal to the width of the interconnection element.

[0016] Optionally, the fine gate electrode is electrically connected to the interconnection member through a connection portion; the connection portion includes an upper edge connection portion and a lower edge connection portion close to the upper and lower edge positions of the battery cell along the first direction; along the first direction, at least two connection fine gates are arranged on the upper side of the upper edge connection portion and / or on the lower side of the lower edge connection portion, and the fine gate electrode is electrically connected to the upper edge connection portion and / or the lower edge connection portion through the at least two connection fine gates.

[0017] The connecting fine gates are spaced apart and distributed along the second direction, and the covering width of the at least two connecting fine gates is smaller than the width of the interconnection member.

[0018] Optionally, the edge connection portion includes a main body portion and a protruding portion, and the connection fine grid is electrically connected to the main body portion through the protruding portion.

[0019] Optionally, an insulating block is provided between the connecting fine grid and the interconnection member;

[0020] And / or, the thickness of the connecting fine grid is 3 micrometers to 12 micrometers.

[0021] Optionally, the reinforcement portion includes a first reinforcement portion, wherein along a first direction, a width of the first reinforcement portion is greater than a width of the fine gate electrode, and along an extension direction of the fine gate electrode, a length of the first reinforcement portion is greater than or equal to a width of the interconnection member.

[0022] Optionally, the reinforcement portion includes a second reinforcement portion, and the thickness of the second reinforcement portion is greater than that of the fine gate electrode;

[0023] And / or, the reinforcement part includes a third reinforcement part, the material of the third reinforcement part includes silver, and the content of silver is 55%-90%.

[0024] Optionally, the second reinforcement portion covers the fine gate electrode, and the sum of the thickness of the fine gate electrode and the second reinforcement portion is 3 micrometers to 12 micrometers.

[0025] In a second aspect, an embodiment of the utility model further provides a photovoltaic system, comprising a plurality of photovoltaic modules as described in any one of the above items.

[0026] In an embodiment of the utility model, along the thickness direction of the battery cell, at the overlapping position of the fine gate electrode and the interconnection piece, there is a spacer between the interconnection piece and the fine gate electrode, or the interconnection piece is in contact with the fine gate electrode and is not welded; or a conductive reinforcement portion is provided between the fine gate electrode and the interconnection piece. Therefore, when the interconnection piece is welded to the battery cell, there is a spacer or reinforcement portion between the interconnection piece and the fine gate electrode, so that the interconnection piece will not be welded to the fine gate electrode, thereby reducing the risk of the fine gate electrode being welded off during welding, reducing current loss, and improving the conversion efficiency of the battery cell.

[0027] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of the connection structure between a cell and an interconnection member in a photovoltaic module provided by an embodiment of the utility model;

[0029] Figure 2 A schematic diagram of the structure of a cell in a photovoltaic module provided by an embodiment of the utility model;

[0030] Figure 3 for Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0031] Figure 4 A schematic diagram of the connection structure between a cell and an interconnector in another photovoltaic module provided by an embodiment of the utility model;

[0032] Figure 5 A partial structural schematic diagram of a cell in another photovoltaic module provided in an embodiment of the utility model.

[0033] Reference numerals:

[0034] 1-battery cell, 11-connecting part, 111-edge connecting part, 1111-main part, 1112-protruding part, 112-middle connecting part, 12-fine gate electrode, 121-edge fine gate electrode, 122-middle fine gate electrode, 13-heterogeneous fine gate electrode, 131-first heterogeneous fine gate electrode, 132-second heterogeneous fine gate electrode, 14-reinforcement part, 15-insulating block, 151-T-shaped insulating block, 16-pad, 17-strip insulating block, 18-horizontal rectangular insulating block, 19-connecting fine gate, 2-interconnection piece. DETAILED DESCRIPTION

[0035] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0036] First, refer to Figure 1 , Figure 4 and Figure 5 The utility model embodiment discloses a photovoltaic module, including a cell 1 and an interconnection member 2, the cell 1 including a plurality of fine gate electrodes 12 extending along a second direction and arranged at intervals in a first direction; the fine gate electrodes 12 are electrically connected to the interconnection member 2 extending along the first direction; the first direction intersects with the second direction; the fine gate electrodes 12 overlap with the interconnection member 2; along the thickness direction of the cell, at the overlapping position of the fine gate electrodes 12 and the interconnection member 2, there is a spacer between the interconnection member 2 and the fine gate electrodes 12, or the interconnection member 2 is in contact with the fine gate electrodes 12 and is not welded; or there is a conductive reinforcement portion 14 between the fine gate electrodes 12 and the interconnection member 2.

[0037] Specifically, a plurality of cells 1 are connected in series to form a photovoltaic module through an interconnection member 2. The interconnection member 2 may be a welding strip or a film-coated welding strip, wherein the welding strip is a flat welding strip or a round welding strip, and the welding strip may also be set to a welding strip of other shapes according to actual needs. The welding strip may be a tinned welding strip. The cell 1 is welded to the interconnection member 2, and the welding method of the cell 1 and the interconnection member 2 may be infrared welding.

[0038] The first direction can refer to Figure 1 The second direction is preferably perpendicular to the first direction, as shown by the arrow B in FIG. 1 . The fine gate electrode 12 is electrically connected to the interconnection member 2 through the connection portion 11. The connection portion 11 may be a pad, a thickened segment, or a specific portion provided on the fine gate electrode 12. The connection portion 11 includes an edge connection portion 111 close to both side edges of the battery cell 1 along the first direction, and the fine gate electrode 12 includes an edge fine gate electrode 121 located on one side of the edge connection portion 111 close to the edge of the battery cell 1 and an intermediate fine gate electrode 122 located between the edge connection portions 111 on both sides.

[0039] The connection portion 11 further includes an intermediate connection portion 112 located between two edge connection portions 111 spaced apart along the first direction, and the size of the edge connection portion 111 along the first direction is greater than the size of the intermediate connection portion 112 along the second direction. The size of the edge connection portion 111 along the second direction and the size of the intermediate connection portion 112 along the second direction are both greater than the width of the interconnection member 2.

[0040] Along the thickness direction of the battery cell 1, the spacer between the interconnection part 2 and the fine gate electrode 12 may be an insulating block 15. Along the first direction, a spacer 16 may be provided on the upper side and / or the lower side of the fine gate electrode 12. When the interconnection part 2 passes by, the spacer 16 lifts up the interconnection part 2, so that the fine gate electrode 12 is in contact with the interconnection part 2 without being welded. The reinforcing portion 14 is used to reinforce the fine gate electrode 12, and the reinforcing portion 14 is made of a conductive material. It should be noted that the fine gate electrode 12 is in contact with the interconnection part 2 without being welded means that although the fine gate electrode 12 is in contact with the interconnection part 2, the two are not welded together during the welding process. At this time, the fine gate electrode 12 and the interconnection part 2 may only be in contact or a small amount of packaging glue may invade.

[0041] In the embodiment of the utility model, along the thickness direction of the battery cell 1, at the overlapping position of the fine gate electrode 12 and the interconnection member 2, there is a spacer between the interconnection member 2 and the fine gate electrode 12, or the interconnection member 2 is in contact with the fine gate electrode 12 and is not welded; or, there is a conductive reinforcement portion between the fine gate electrode 12 and the interconnection member 2. Therefore, when the interconnection member 2 is welded to the battery cell 1, there is a spacer or reinforcement portion between the interconnection member 2 and the fine gate electrode 12, so that the interconnection member 2 will not be welded to the fine gate electrode 12, thereby reducing the risk of the fine gate electrode 12 being welded off during welding, reducing current loss, and improving the conversion efficiency of the battery cell.

[0042] In a preferred embodiment of the present invention, the battery cell 1 is a busbar-less battery cell, and / or the battery cell 1 is a back-contact battery cell.

[0043] Specifically, the cell 1 can be a busbar-free cell, that is, only a fine grid electrode 12 is provided on the cell 1, the busbar line is removed, and the slurry consumed by the busbar line is saved. The cell 1 can be a back contact cell, the light-receiving surface of the back contact cell has no electrode, and the positive and negative electrodes are both provided on the backlight surface of the cell, thereby reducing the blocking of the light-receiving surface of the cell by the electrode, increasing the light-receiving area of ​​the light-receiving surface of the cell, and improving the energy conversion efficiency of the cell. The cell 1 can specifically be an IBC (Interdigitated Back Contact) cell.

[0044] In a preferred embodiment of the present invention, referring to Figure 4 Along the first direction, a spacer 16 is disposed on the upper side and / or the lower side of the fine gate electrode 12 .

[0045] Specifically, the battery cell 1 further includes a plurality of opposite-sex fine grid electrodes 13 extending along the second direction and arranged at intervals in the first direction. The polarity of the opposite-sex fine grid electrode 13 is opposite to the polarity of the fine grid electrode 12. When the fine grid electrode 12 is positive polarity, the opposite-sex fine grid electrode 13 is negative polarity. When the fine grid electrode 12 is negative polarity, the opposite-sex fine grid electrode 13 is positive polarity.

[0046] The upper side and / or the lower side of the fine gate electrode 12 are both adjacent to the fine gate electrode 13 of the opposite sex, and the spacer 16 can be disposed on the fine gate electrode 13 of the opposite sex. Of course, the spacer 16 can also be disposed between the fine gate electrode 12 and the fine gate electrode 13 of the opposite sex.

[0047] The heterogeneous fine gate electrode 13 includes a first heterogeneous fine gate electrode 131 located on one side of the edge connection portion 111 close to the edge of the battery cell 1 and a second heterogeneous fine gate electrode 132 located between the edge connection portions 111 on both sides. Preferably, a pad 16 is provided on the upper side and / or the lower side of the edge fine gate electrode 121, and the pad 16 is provided on the first heterogeneous fine gate electrode 131.

[0048] In the embodiment of the utility model, a spacer 16 is provided on the upper side and / or the lower side of the fine gate electrode 12. When the interconnection member 2 passes by, the spacer 16 supports the interconnection member 2, so that the fine gate electrode 12 contacts the interconnection member 2 without welding.

[0049] In a preferred embodiment of the present invention, the spacer 16 is an insulating spacer, and / or the height of the spacer 16 is greater than the height of the fine gate electrode 12 .

[0050] Specifically, the insulating spacer may be insulating glue. The width of the spacer 16 is greater than the width of the interconnection 2. Preferably, a spacer 16 is provided between each first heterogeneous fine gate electrode 131 and the interconnection 2. Since the height of the spacer 16 is greater than the height of the fine gate electrode 12, when the interconnection 2 is placed, the spacer 16 will support the interconnection 2, thereby preventing the interconnection 2 from contacting or welding with the fine gate electrode 12. In addition, when the spacer 16 is an insulating spacer, it can also achieve insulation between the interconnection 2 and the heterogeneous fine gate electrode 13.

[0051] In a preferred embodiment of the present invention, referring to Figures 1 to 3 An insulating block 15 is disposed between the interconnection member 2 and the fine gate electrode 12 , and a spacer between the interconnection member 2 and the fine gate electrode 12 includes the insulating block 15 .

[0052] Specifically, the insulating block 15 may be an insulating glue. The insulating block 15 may also cover the heterogeneous fine gate electrode 13 adjacent to the fine gate electrode 12. The insulating block 15 may be rectangular or T-shaped. Preferably, an insulating block 15 is provided between the interconnection member 2 and the edge fine gate electrode 121. When the interconnection member 2 is welded to the battery cell 1, due to the provision of the insulating block 15, the interconnection member 2 will not be in direct contact with the fine gate electrode 12, thereby preventing the fine gate electrode 12 from being welded off.

[0053] In a preferred embodiment of the present invention, referring to Figures 1 to 3, the fine gate electrode 12 is electrically connected to the interconnection member 2 through the connection portion 11; along the first direction, the connection portion 11 includes an edge connection portion 111 close to the two side edges of the battery cell 1; along the first direction, a horizontal rectangular insulating block, a vertical rectangular insulating block, or a combination of a horizontal rectangular insulating block and a vertical rectangular insulating block is provided on one side of the edge connection portion 111 close to the edge of the battery cell.

[0054] Specifically, the upper side and / or the lower side of the edge connection portion 111 is provided with connection fine grids 19 , and the number of connection fine grids 19 connected to each edge connection portion 111 may be one, two, three, four, etc.

[0055] Along the first direction, a horizontal rectangular insulating block 18 may be provided on one side of the edge connection portion 111 close to the edge of the cell, or a vertical rectangular insulating block may be provided, or a combination of a horizontal rectangular insulating block and a vertical rectangular insulating block, such as a T-shaped insulating block 151, may be provided. When the T-shaped insulating block 151 is provided, the T-shaped insulating block 151 preferably covers the fine gate electrode 12. When the T-shaped insulating block 151 covers the fine gate electrode 12, it preferably also covers the heterogeneous fine gate electrode 13 adjacent to the fine gate electrode 12, so as to achieve insulation between the interconnect 2 and the heterogeneous fine gate electrode 13. The T-shaped insulating block 151 preferably covers the first heterogeneous fine gate electrode 131 adjacent to the edge fine gate electrode 121.

[0056] When only the horizontal rectangular insulating block 18 is provided, the horizontal rectangular insulating block 18 preferably covers the fine gate electrode 12 and the heterogeneous fine gate electrode 13. When the T-shaped insulating block 151 and the horizontal rectangular insulating block 18 are provided at the same time, the horizontal rectangular insulating block 18 can be provided between the first heterogeneous fine gate electrode 131 and the interconnection member 2 which do not overlap with the orthographic projection of the T-shaped insulating block 151 on the battery cell 1, so as to achieve insulation between the interconnection member 2 and the heterogeneous fine gate electrode 13. The number of horizontal rectangular insulating blocks 18 on one side of a single edge connection portion 111 can be set according to actual needs, such as being set to one, two, etc. One horizontal rectangular insulating block 18 is preferably provided. The width of the horizontal rectangular insulating block 18 is greater than the width of the interconnection member 2.

[0057] The T-shaped insulating block 151 includes a vertical rectangular insulating portion close to the edge connection portion 111 and a horizontal rectangular insulating portion away from the edge connection portion, the width of the horizontal rectangular insulating portion is greater than the width of the vertical rectangular insulating portion, and the width of the vertical rectangular insulating portion is greater than the width of the interconnection member. The T-shaped insulating block 151 has a large area and can cover more edge fine gate electrodes 121, thereby preventing more edge fine gate electrodes 121 from contacting the interconnection member 2, and can also avoid short circuits or fine gate welding problems caused by the displacement of the head or tail of the interconnection member 2 in the second direction.

[0058] In a preferred embodiment of the present invention, the width of the insulating block 15 is greater than or equal to the width of the interconnection 2. When the width of the insulating block 15 is greater than or equal to the width of the interconnection 2, the edge of the interconnection 2 along its width direction can be prevented from contacting the fine gate electrode 12.

[0059] The thickness of the insulating block 15 may be 18 mm to 50 mm. The thickness of the insulating block 15 is preferably 30 mm to 50 mm. The thickness of the insulating block 15 may be 30 mm, 32 mm, 35 mm, 40 mm, 45 mm, 50 mm, etc. When the thickness of the insulating block 15 is within the above range, the insulating block 15 also acts as a buffer to prevent the cut interconnection member 2 from easily piercing the insulating block 15, thereby preventing the interconnection member 2 from scratching the battery cell 1.

[0060] The insulating block 15 as a spacer between the interconnection member 2 and the fine gate electrode 12 may be an insulating material printed on the surface of the cell 1, or may be an insulating glue intruding between the fine gate electrode 12 and the interconnection member 2 during the lamination process, or may be an insulating material formed between the interconnection member 2 and the fine gate electrode 12 in other ways. It is understandable that the spacer between the interconnection member 2 and the fine gate electrode 12 may be various insulating materials.

[0061] In a preferred embodiment of the present invention, referring to Figure 2 and Figure 3 , the fine gate electrode 12 is electrically connected to the interconnection member 2 through the connection portion 11; the connection portion 11 includes an upper edge connection portion and a lower edge connection portion close to the upper and lower edge positions of the battery cell 1 along the first direction; along the first direction, at least two connecting fine gates 19 are arranged on the upper side of the upper edge connection portion and / or the lower side of the lower edge connection portion, and the fine gate electrode 12 is electrically connected to the upper edge connection portion and / or the lower edge connection portion through at least two connecting fine gates 19; the connecting fine gates 19 are spaced apart along the second direction, and the covering width of at least two connecting fine gates 19 is smaller than the width of the interconnection member 2.

[0062] Specifically, the number of the connecting fine grids 19 provided on the upper side of the upper edge connecting portion and / or the lower side of the lower edge connecting portion can be two, three, four, etc. The number of the connecting fine grids 19 provided on the upper side of the upper edge connecting portion and / or the lower side of the lower edge connecting portion is preferably two. The material of the connecting fine grid 19 is the same as that of the fine grid electrode 12, and the connecting fine grid 19 can be printed and manufactured synchronously with the fine grid electrode 12.

[0063] The covering width of at least two connecting fine grids 19 is smaller than the width of the interconnection member 2. When the interconnection member 2 is positioned accurately, the interconnection member 2 covers at least two connecting fine grids 19. At this time, the interconnection member 2 is in contact with at least two connecting fine grids 19. When one of the connecting fine grids 19 is welded off, the other connecting fine grids 19 can conduct current.

[0064] When at least two connecting fine grids 19 are provided, even if there is a risk of the connecting fine grids 19 being welded off, the risk of at least two connecting fine grids 19 being welded off at the same time can be reduced, and the fine grid electrode 12 can still be electrically connected to the upper edge connecting portion and / or the lower edge connecting portion through the connecting fine grids 19 that are not welded off. In addition, at least two connecting fine grids 19 can collect more current.

[0065] In a preferred embodiment of the present invention, referring to Figure 3 The edge connection portion 111 includes a main body portion 1111 and a protruding portion 1112 , and the connection fine grid 19 is electrically connected to the main body portion 1111 through the protruding portion 1112 .

[0066] Specifically, the number of the protrusions 1112 is preferably equal to the number of the connecting fine grids 19. When two connecting fine grids 19 are provided, two protrusions 1112 are provided accordingly. One end of the connecting fine grid 19 close to the edge connecting portion 111 is electrically connected to the main body 1111 through the protrusions 1112. The width of the protrusions 1112 is greater than the width of the connecting fine grid 19. By providing the protrusions 1112, the connecting fine grid 19 can be prevented from being welded off due to the interconnection member 2 contacting one end of the connecting fine grid 19 close to the edge connecting portion 111, and the insulating block 15 can also be prevented from directly contacting the main body 1111.

[0067] The insulating block 15 preferably does not contact the protrusion 1112. Along the first direction, the distance between the insulating block 15 and the protrusion 1112 is greater than zero. Along the first direction, the distance between the insulating block 15 and the protrusion 1112 is less than or equal to 1.6 mm. Along the first direction, the distance between the insulating block 15 and the protrusion 1112 is preferably less than or equal to 0.7 mm.

[0068] In a preferred embodiment of the present invention, referring to Figure 2 and Figure 3 , an insulating block 15 is provided between the connecting fine gate 19 and the interconnection member 2; and / or, the thickness of the connecting fine gate 19 is 3 micrometers to 12 micrometers.

[0069] In the embodiment of the utility model, the interconnection member 2 is separated from the connection fine grid 19 by the insulating block 15. Therefore, when the interconnection member 2 is welded to the battery cell 1, the interconnection member 2 will not directly contact the connection fine grid 19, thereby avoiding the connection fine grid 19 being welded off during welding.

[0070] The thickness of the connecting fine grid 19 is preferably 5 microns to 10 microns. The thickness of the connecting fine grid 19 can be 5 microns, 6 microns, 7 microns, 8 microns, 9 microns, 10 microns, etc. In the embodiment of the utility model, the thickness of the connecting fine grid 19 is increased, the welding performance thereof is improved, and the risk of the connecting fine grid 19 being welded off is reduced.

[0071] The material of the connecting fine grid 19 includes silver, and the silver content is 55%-90%. The silver content in the connecting fine grid 19 is preferably 60%-80%. The silver content in the connecting fine grid 19 can be 60%, 65%, 70%, 72%, 75%, 80%, etc. In the embodiment of the utility model, the silver content of the connecting fine grid 19 is increased to prevent the connecting fine grid 19 from being broken during the welding process.

[0072] In addition, the weldability of the connecting fine grid 19 can be improved by increasing the density of the connecting fine grid 19, thereby reducing the risk of the connecting fine grid 19 being welded off. The way to increase the density of the connecting fine grid 19 is to make the slurry more corrosive and reduce the honeycomb, thereby increasing the density.

[0073] In a preferred embodiment of the present invention, referring to Figure 5 The reinforcement portion 14 includes a first reinforcement portion. Along the first direction, the width of the first reinforcement portion is greater than the width of the fine gate electrode 12 . Along the extending direction of the fine gate electrode 12 , the length of the first reinforcement portion is greater than or equal to the width of the interconnection member 2 .

[0074] Specifically, the first reinforcement part is used to reinforce the fine gate electrode 12. The first reinforcement part can be a conductive adhesive, a pad, etc. The first reinforcement part is preferably a pad. When the first reinforcement part is a pad, its material is the same as that of the connecting part 11, and the first reinforcement part can be printed and manufactured simultaneously with the connecting part 11.

[0075] The fine gate electrode 12 can be electrically connected to the interconnection member 2 through the first reinforcement portion. Preferably, the edge fine gate electrode 121 is electrically connected to the interconnection member 2 through the first reinforcement portion, so that the edge fine gate electrode 121 can transmit the collected current to the interconnection member 2 through the first reinforcement portion. In the embodiment of the utility model, the length of the first reinforcement portion is greater than the width of the interconnection member 2, thereby preventing the edge of the interconnection member 2 along its width direction from contacting the fine gate electrode 12.

[0076] In a preferred embodiment of the present invention, the reinforcing portion 14 includes a second reinforcing portion, the thickness of the second reinforcing portion is greater than the fine gate electrode; and / or, the reinforcing portion includes a third reinforcing portion, the material of the third reinforcing portion includes silver, and the silver content is 55%-90%.

[0077] Specifically, the material of the second reinforcement portion can be the same as that of the fine gate electrode. The thickness of the second reinforcement portion is greater than that of the fine gate electrode, so that the fine gate electrode 12 and the second reinforcement portion are thicker as a whole, improving the welding performance of the second reinforcement portion and the fine gate electrode 12 and reducing the risk of the fine gate electrode 12 being welded off.

[0078] The reinforcement 14 includes a third reinforcement. The silver content in the third reinforcement is preferably 60%-80%. The silver content in the edge fine gate electrode 121 can be 60%, 65%, 70%, 72%, 75%, 80%, etc. In the embodiment of the utility model, the silver content in the third reinforcement is relatively high, so as to prevent the fine gate electrode from being welded off during the welding process.

[0079] In a preferred embodiment of the present invention, the second reinforcement portion covers the fine gate electrode 12, and the sum of the thickness of the fine gate electrode 12 and the second reinforcement portion is 3 micrometers to 12 micrometers.

[0080] Specifically, the sum of the thickness of the fine gate electrode 12 and the second reinforcement portion is preferably 5 microns to 10 microns. The sum of the thickness of the fine gate electrode 12 and the second reinforcement portion can be 5 microns, 6 microns, 7 microns, 8 microns, 9 microns, 10 microns, etc. When the sum of the thickness of the fine gate electrode 12 and the second reinforcement portion is within the above range, the sum of the thickness of the fine gate electrode 12 and the second reinforcement portion is thicker, which improves the welding performance of the second reinforcement portion and the fine gate electrode 12 and reduces the risk of the fine gate electrode 12 being welded off.

[0081] In addition, the weldability of the fine gate electrode 12 can be improved by increasing its density, thereby reducing the risk of the fine gate electrode 12 being welded off. The density of the fine gate electrode 12 can be increased by making the slurry more corrosive and reducing the honeycomb shape, thereby increasing the density.

[0082] Reference Figures 1 to 4 , a strip insulating block 17 is provided between the second heterosexual fine gate electrode 132 and the interconnection member 2. Specifically, the strip insulating block 17 may be an insulating glue, and the size of the strip insulating block 17 along the second direction is greater than the width of the interconnection member 2, and the size of the strip insulating block 17 along the first direction is greater than the width of the second heterosexual fine gate electrode 132. By implementing the strip insulating block 17, insulation between the interconnection member 2 and the second heterosexual fine gate electrode 132 can be achieved.

[0083] The connection portion 11 further includes an intermediate connection portion 112, which is disposed on the intermediate fine gate electrode 122 and between two edge connection portions 111 spaced apart along the first direction. The size of the intermediate connection portion 112 along the first direction is smaller than that of the edge connection portion 111 along the first direction.

[0084] Along the first direction, the fine gate electrodes 12 and the heterogeneous fine gate electrodes 13 are spaced apart. Along the first direction, when the distance between two adjacent fine gate electrodes 12 and the heterogeneous fine gate electrodes 13 is represented by d1, the size of the edge connection portion 111 along the first direction may be greater than or equal to 2 times d1. The size of the middle connection portion 112 along the first direction may be less than or equal to d1.

[0085] In a second aspect, the embodiment of the utility model further discloses a photovoltaic system, comprising a plurality of photovoltaic modules provided by any one of the above items. Since the photovoltaic system comprises the above photovoltaic modules, it also has the beneficial effects of the above photovoltaic modules, which will not be described in detail here.

[0086] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0087] The embodiments of the utility model are described above in conjunction with the accompanying drawings, but the utility model is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the utility model, ordinary technicians in this field can also make many forms without departing from the scope of protection of the utility model and the claims, which all fall within the protection of the utility model.

Claims

1. A photovoltaic module, characterized in that: The invention comprises a battery cell and an interconnection member, wherein the battery cell comprises a plurality of fine gate electrodes extending in a second direction and arranged at intervals in a first direction; the fine gate electrodes are electrically connected to the interconnection member extending in the first direction; the first direction intersects with the second direction; The fine gate electrode overlaps the interconnection member; Along the thickness direction of the cell, at the overlapping position of the fine gate electrode and the interconnection member, there is a spacer between the interconnection member and the fine gate electrode, or the interconnection member is in contact with the fine gate electrode without being welded; Alternatively, a conductive reinforcement portion is provided between the fine gate electrode and the interconnection member.

2. The photovoltaic module according to claim 1, characterized in that: The cell is a busbar-less cell, and / or the cell is a back-contact cell.

3. The photovoltaic module according to claim 1, characterized in that: Along the first direction, a spacer is disposed on the upper side and / or the lower side of the fine gate electrode.

4. The photovoltaic module according to claim 3, characterized in that: The spacer is an insulating spacer, and / or the height of the spacer is greater than the height of the fine gate electrode.

5. The photovoltaic module according to claim 1, characterized in that: An insulating block is disposed between the interconnection member and the fine gate electrode, and a spacer between the interconnection member and the fine gate electrode includes the insulating block.

6. The photovoltaic module according to claim 5, characterized in that: The fine gate electrode is electrically connected to the interconnection member through a connecting portion; along the first direction, the connecting portion includes edge connecting portions close to both side edges of the battery cell; Along the first direction, a horizontal rectangular insulating block, a vertical rectangular insulating block, or a combination of a horizontal rectangular insulating block and a vertical rectangular insulating block is disposed on one side of the edge connecting portion close to the edge of the battery cell.

7. The photovoltaic module according to claim 5, characterized in that: The width of the insulating block is greater than or equal to the width of the interconnection element.

8. The photovoltaic module according to claim 1, characterized in that: The fine gate electrode is electrically connected to the interconnection member through a connection portion; the connection portion includes an upper edge connection portion and a lower edge connection portion close to the upper and lower edge positions of the battery cell along the first direction; along the first direction, at least two connection fine gates are arranged on the upper side of the upper edge connection portion and / or on the lower side of the lower edge connection portion, and the fine gate electrode is electrically connected to the upper edge connection portion and / or the lower edge connection portion through the at least two connection fine gates; The connecting fine gates are spaced apart and distributed along the second direction, and the covering width of the at least two connecting fine gates is smaller than the width of the interconnection member.

9. The photovoltaic module according to claim 8, characterized in that: The edge connection portion includes a main body portion and a protruding portion, and the connection fine grid is electrically connected to the main body portion through the protruding portion.

10. The photovoltaic module according to claim 8, characterized in that: An insulating block is provided between the connecting fine grid and the interconnection member; And / or, the thickness of the connecting fine grid is 3 micrometers to 12 micrometers.

11. The photovoltaic module according to claim 1, characterized in that: The reinforcing portion includes a first reinforcing portion. Along a first direction, a width of the first reinforcing portion is greater than a width of the fine gate electrode. Along an extending direction of the fine gate electrode, a length of the first reinforcing portion is greater than or equal to a width of the interconnection member.

12. The photovoltaic module according to claim 1, characterized in that: The reinforcing portion includes a second reinforcing portion, the thickness of the second reinforcing portion is greater than that of the fine gate electrode; And / or, the reinforcement part includes a third reinforcement part, the material of the third reinforcement part includes silver, and the content of silver is 55%-90%.

13. The photovoltaic module according to claim 12, characterized in that: The second reinforcement portion covers the fine gate electrode, and the sum of the thickness of the fine gate electrode and the second reinforcement portion is 3 micrometers to 12 micrometers.

14. A photovoltaic system, characterized in that: The invention comprises a plurality of photovoltaic modules according to any one of claims 1 to 13.

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