Solar cell and photovoltaic module

Abstract

The utility model discloses a solar cell and a photovoltaic assembly, and belongs to the field of photovoltaic technology. The solar cell comprises a cell body; the plurality of insulating strips are arranged on the battery piece body, the plurality of insulating strips extend along a first direction and are distributed at intervals along a second direction, and the second direction intersects with the first direction; wherein the insulating strip comprises a plurality of insulating parts which are arranged at intervals along the first direction; and along the first direction, the ratio of the sum of the lengths of the plurality of insulating parts to the width of the battery piece body is greater than or equal to 55% and less than 100%.

Description

Technical Field

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

[0002] Back-contact solar cells refer to cells whose positive and negative grid lines are both set on the back of the cell to reduce the shading of the positive and negative grid lines on the front of the cell, thereby improving the photoelectric conversion efficiency of the cell. During the processing of photovoltaic modules, it is necessary to connect the positive or negative grid lines of two adjacent back-contact solar cells through welding strips to connect the two adjacent cells in series to form a battery string.

[0003] In order to prevent the welding strip connecting the positive pole grid line from being connected to the negative pole grid line, or the welding strip connecting the negative pole grid line from being connected to the positive pole grid line, which may cause a short circuit in the photovoltaic module, it is usually necessary to coat the surface of the solar cell along the extension direction of the welding strip, so as to prevent the welding strip connecting the positive pole grid line from being connected to the negative pole grid line, or the welding strip connecting the negative pole grid line from being connected to the positive pole grid line.

[0004] However, the conventional coating of insulating adhesive is usually to uniformly coat the surface of the cell along the extension direction of the solder strip. This coating method results in a large amount of insulating adhesive, and further excessive insulating adhesive will cause the cell to warp severely, resulting in higher costs and lower yields of photovoltaic modules. Utility Model Content

[0005] The utility model discloses a solar cell sheet and a photovoltaic module, so as to solve or at least partially solve the problems existing in the prior art that a large amount of insulating glue is used, resulting in serious warping of the cell sheet, high cost of the photovoltaic module and reduced yield.

[0006] In order to solve the above technical problems, the utility model is achieved as follows:

[0007] In a first aspect, the utility model discloses a solar cell, comprising: a cell body; a plurality of insulating strips, wherein the plurality of insulating strips are arranged on the cell body, the plurality of insulating strips extend along a first direction, and are spaced apart along a second direction, and the second direction intersects with the first direction; wherein the insulating strip comprises a plurality of insulating portions spaced apart along the first direction; and along the first direction, the ratio of the sum of the lengths of the plurality of insulating portions to the width of the cell body is greater than or equal to 55% and less than 100%.

[0008] Optionally, the ratio of the sum of the lengths of the multiple insulating parts to the width of the solar cell body is greater than or equal to 65% and less than 100%; and / or the solar cell is a back-contact solar cell; and / or the multiple insulating strips include a first insulating strip and a second insulating strip.

[0009] Optionally, the first insulating strip includes a first insulating portion, a second insulating portion and a third insulating portion, wherein the first insulating portion, the second insulating portion and the third insulating portion are arranged at intervals along the first direction; the second insulating portion is located between the first insulating portion and the third insulating portion or the second insulating portion is located between two adjacent third insulating portions; the third insulating portion is located between two adjacent second insulating portions; and / or, the first insulating portion, the second insulating portion and the third insulating portion are each provided in plurality, and along the first direction, the ratio of the sum of the lengths of the plurality of first insulating portions, the plurality of second insulating portions and the plurality of third insulating portions to the width of the battery cell body is greater than or equal to 50% and less than or equal to 95%.

[0010] Optionally, the first insulating portion includes a first sub-insulating portion, a second sub-insulating portion and a third sub-insulating portion, wherein the first sub-insulating portion has a U-shaped structure; the second sub-insulating portion and the third sub-insulating portion are both strip-shaped structures and extend along the second direction; along the first direction, the middle area of ​​the second sub-insulating portion is connected to one side of the first sub-insulating portion, and there is a gap between the two ends of the second sub-insulating portion and the first sub-insulating portion, and the middle area of ​​the third sub-insulating portion is connected to the other side of the first sub-insulating portion, and there is a gap between the two ends of the third sub-insulating portion and the first sub-insulating portion.

[0011] Optionally, a first connection point is provided on the battery cell body, and the first sub-insulating part surrounds the first connection point; and / or, the first insulating part also includes a first protrusion and a second protrusion, wherein the first protrusion is connected to a side of the second sub-insulating part away from the first sub-insulating part, and the second protrusion is connected to a side of the third sub-insulating part away from the first sub-insulating part.

[0012] Optionally, the second insulating part includes a fifth sub-insulating part and a sixth sub-insulating part, and along the second direction, the fifth sub-insulating part is arranged opposite to the sixth sub-insulating part; the fifth sub-insulating part and the sixth sub-insulating part are each provided with a plurality, and the plurality of the fifth sub-insulating parts and the plurality of the sixth sub-insulating parts are arranged at intervals along the first direction.

[0013] Optionally, along the first direction, the distance between two adjacent fifth sub-insulating portions is p1, and the distance between two adjacent sixth sub-insulating portions is p2, satisfying: 0 mm < p1 ≤ 3 mm, 0 mm < p2 ≤ 3 mm; and / or, the solar cell further includes a fourth sub-insulating portion disposed on the cell body. Along the second direction, the fifth sub-insulating portion and the sixth sub-insulating portion are located on both sides of the fourth sub-insulating portion; along the first direction, the fifth sub-insulating portion and the sixth sub-insulating portion are both arranged in a staggered manner with respect to the fourth sub-insulating portion.

[0014] Optionally, the solar cell further includes a plurality of fourth sub-insulating portions, all of which are disposed on the cell body and are arranged at intervals along the first direction; and / or, along the direction from the fifth sub-insulating portion to the sixth sub-insulating portion, the width of the fifth sub-insulating portion gradually increases; and / or, along the direction from the sixth sub-insulating portion to the fifth sub-insulating portion, the width of the sixth sub-insulating portion gradually increases.

[0015] Optionally, the fourth sub-insulating portion has a strip structure. Along the first direction, the center line of the fourth sub-insulating portion coincides with the symmetry line between two adjacent fifth sub-insulating portions or two adjacent sixth sub-insulating portions.

[0016] Optionally, the third insulating portion includes a first eighth sub-insulating portion and a second eighth sub-insulating portion, and there are a plurality of both the first eighth sub-insulating portion and the second eighth sub-insulating portion; along the first direction, a plurality of the first eighth sub-insulating portions and a plurality of the second eighth sub-insulating portions are both arranged at intervals, and along the second direction, the first eighth sub-insulating portion and the second eighth sub-insulating portion are arranged opposite to each other.

[0017] Optionally, along the first direction, two adjacent first eighth sub-insulating portions are symmetrically distributed, two adjacent second eighth sub-insulating portions are symmetrically distributed, the distance between two adjacent first eighth sub-insulating portions is t1, and the distance between two adjacent second eighth sub-insulating portions is t2, satisfying: 0 mm < t1 ≤ 2 mm, 0 mm < t2 ≤ 2 mm; and / or, both the first eighth sub-insulating portion and the second eighth sub-insulating portion are Z-shaped structures; and / or, the solar cell further includes a seventh sub-insulating portion, there are a plurality of the seventh sub-insulating portions, and they are all in strip structures. A plurality of the seventh sub-insulating portions all extend along the first direction and are arranged at intervals along the first direction; along the second direction, the first eighth sub-insulating portion and the second eighth sub-insulating portion are both located on both sides of one of the seventh sub-insulating portions, and the first eighth sub-insulating portion and the second eighth sub-insulating portion are symmetrically distributed.

[0018] Optionally, the second insulating strip includes a fourth insulating portion, a fifth insulating portion, and a sixth insulating portion. Among them, the fourth insulating portion, the fifth insulating portion, and the sixth insulating portion are arranged at intervals along the first direction; the fifth insulating portion is located between the fourth insulating portion and the sixth insulating portion or the fifth insulating portion is located between two adjacent sixth insulating portions, and the sixth insulating portion is located between two adjacent fifth insulating portions; and / or, there are multiple fourth insulating portions, multiple fifth insulating portions, and multiple sixth insulating portions. Along the first direction, the ratio of the sum of the lengths of the multiple fourth insulating portions, the multiple fifth insulating portions, and the multiple sixth insulating portions to the width of the battery cell body is greater than or equal to 50% and less than or equal to 95%.

[0019] Optionally, the fourth insulating portion includes a first sub-insulating portion, and the first sub-insulating portion has a U-shaped structure. Along the first direction, a plurality of third protrusions are arranged at intervals on the bottom wall of the U-shaped first sub-insulating portion; there are two first sub-insulating portions, and the two first sub-insulating portions are arranged at intervals along the second direction, and the opening of one first sub-insulating portion faces the opening of the other first sub-insulating portion.

[0020] Optionally, both the fifth insulating portion and the sixth insulating portion include multiple groups of second sub-insulating portions arranged at intervals along the first direction. Each group of second sub-insulating portions includes two insulator portions arranged at intervals along the second direction; each insulator portion has a strip structure, and the length direction of the strip structure is the second direction.

[0021] Optionally, in the fifth insulating portion, along the first direction, the interval between two adjacent insulator portions is m1, satisfying: 0mm < m1 ≤ 2mm; and / or, in the sixth insulating portion, along the first direction, the interval between two adjacent insulator portions is m2, satisfying: 0mm < m2 ≤ 2mm; and / or, along the second direction, in the fifth insulating portion, there is a first gap between the two insulator portions in each group of second sub-insulating portions, and in the sixth insulating portion, there is a second gap between the two insulator portions in each group of second sub-insulating portions, where the second gap is greater than the first gap.

[0022] Optionally, the battery cell body is provided with a plurality of main grids, and the plurality of main grids all extend along the first direction; the plurality of main grids include a plurality of first main grids and a plurality of second main grids, and the first main grids and the second main grids are arranged at intervals along the second direction. Along the second direction, the first insulating strip is at least distributed on both sides of the first main grid; the second insulating strip is at least distributed on both sides of the second main grid;

[0023] And / or, the first insulating strip also includes a first end insulating portion and a second end insulating portion, and the second insulating strip also includes a third end insulating portion and a fourth end insulating portion; along the first direction, the second end insulating portion of the first insulating strip on one of the battery cell bodies is arranged opposite to the third end insulating portion of the second insulating strip on another adjacent battery cell body, and the first end insulating portion of the first insulating strip on another adjacent battery cell body is arranged opposite to the fourth end insulating portion of the second insulating strip on one adjacent battery cell body.

[0024] Optionally, the battery cell body is provided with a plurality of main grids, the main grids extend along the first direction, and the plurality of main grids include a first main grid, wherein, on the plane where the battery cell body is located, the projection of the first convex portion and the projection of the second convex portion at least partially overlap with the projection of the first main grid.

[0025] Optionally, the battery cell body is provided with a plurality of main grids, the main grids extend along the first direction, the plurality of main grids include a first main grid, wherein, on the plane where the battery cell body is located, the projection of the fourth sub-insulating part at least partially overlaps with the projection of the first main grid.

[0026] Optionally, the first main grid is a silver main grid; and / or, the second main grid is an aluminum main grid; and / or, the first end insulating portion includes a plurality of spaced end insulating portions one; and / or, the second end insulating portion includes a plurality of spaced end insulating portions two; and / or, the third end insulating portion includes a plurality of spaced end insulating portions three; and / or, the fourth end insulating portion includes a plurality of spaced end insulating portions four.

[0027] In a second aspect, the utility model further discloses a photovoltaic module, which includes a plurality of solar cells as described in any one of the first aspects.

[0028] Optionally, the photovoltaic component further includes a plurality of welding strips, all of which extend along the first direction and are arranged at intervals on the battery cell body along the second direction; along the second direction, the insulating strips are distributed at least on both sides of the welding strips.

[0029] The utility model discloses a solar cell and a photovoltaic module, wherein the solar cell comprises a cell body; a plurality of insulating strips, wherein the plurality of insulating strips are arranged on the cell body, the plurality of insulating strips extend along a first direction, and are distributed at intervals along a second direction, and the second direction intersects with the first direction; wherein the insulating strip comprises a plurality of insulating parts arranged at intervals along the first direction, and the ratio of the sum of the lengths of the plurality of insulating parts to the width of the cell body is greater than or equal to 55% and less than 100%.

[0030] In the utility model, along the first direction, by setting the ratio of the sum of the lengths of multiple insulating parts in the insulating strip to the width of the battery cell body to be greater than or equal to 55% and less than 100%, the amount of insulating glue in the insulating strip is reduced, and the warping of the battery cell after the insulating glue covers the battery cell is reduced, thereby reducing the cost of the photovoltaic module and improving the process yield of the photovoltaic module. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic diagram showing the structure of the solar cell described in the embodiment of the utility model;

[0032] Figure 2 A schematic diagram showing the structure of the first insulating strip in an embodiment of the utility model;

[0033] Figure 3 A schematic diagram showing the structure of the first insulating part in an embodiment of the utility model;

[0034] Figure 4 A schematic diagram showing the structure of the second insulating portion in an embodiment of the utility model;

[0035] Figure 5 A schematic diagram showing the structure of the third insulating portion in an embodiment of the present utility model;

[0036] Figure 6 A schematic diagram showing the structure of the second insulating strip in an embodiment of the utility model;

[0037] Figure 7 A schematic diagram showing the structure of the fourth insulating portion in an embodiment of the utility model;

[0038] Figure 8 A schematic diagram showing the structure of the fifth insulating portion in an embodiment of the utility model;

[0039] Fig. 9 A schematic diagram showing the structure of the sixth insulating portion in an embodiment of the present utility model;

[0040] Fig.10 A schematic diagram showing the structure of the photovoltaic assembly described in an embodiment of the utility model.

[0041] Reference numerals:

[0042] 10: Battery body;

[0043] 21: first main grid; 22: second main grid;

[0044] 30: Insulation strip;

[0045] 31: first insulating strip;

[0046] 311: first insulating portion;

[0047] 311A: first sub-insulating portion; 311B: second sub-insulating portion; 311C: third sub-insulating portion; 311D: first convex portion; 311E: second convex portion;

[0048] 312: second insulating portion;

[0049] 312A: fourth sub-insulating portion; 312B: fifth sub-insulating portion; 312C: sixth sub-insulating portion;

[0050] 313: third insulating part;

[0051] 313A: seventh sub-insulating part;

[0052] 313B1: eighth sub-insulating portion 1; 313B2: eighth sub-insulating portion 2;

[0053] 314: first end insulating portion; 315: second end insulating portion

[0054] 32: second insulating strip;

[0055] 321: fourth insulating portion;

[0056] 321A: Sub-insulating portion 1; 321B: Third protrusion; 321C: Bottom wall

[0057] 322: fifth insulating portion;

[0058] 322A: sub-insulator part 2; 322AA: insulator part;

[0059] 323: sixth insulating portion;

[0060] 324: third end insulating portion; 325: fourth end insulating portion

[0061] 40: welding strip;

[0062] H: first direction; K: second direction. DETAILED DESCRIPTION

[0063] The embodiments of the utility model will be described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0064] The features of the terms "first", "second", "third", "fourth", etc. in the specification and claims of the utility model may explicitly or implicitly include one or more of the features. In the description of the utility model, unless otherwise specified, the meaning of "multiple" is one or two or more, which shall be reasonably understood according to the actual situation. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally indicates that the objects connected before and after are in an "or" relationship.

[0065] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "topmost", "bottommost", "highest", "lowest", "surrounding", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0066] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0067] like Figures 1 to 9 As shown, an embodiment of the utility model discloses a solar cell, which includes a cell body 10; a plurality of insulating strips, wherein the plurality of insulating strips 30 are all arranged on the cell body 10, and the plurality of insulating strips 30 extend along a first direction H and are arranged at intervals along a second direction K, and the second direction K intersects the first direction H; wherein the insulating strip 30 includes a plurality of insulating portions arranged at intervals along the first direction H, and along the first direction, the ratio of the sum of the lengths of the plurality of insulating portions to the width of the cell body 10 is greater than or equal to 55% and less than 100%.

[0068] like Figures 1 to 9 As shown, the solar cell disclosed in the embodiment of the utility model includes a cell body 10, which is the core component of the photovoltaic module and can convert solar energy into electrical energy. The cell body 10 has a light-receiving surface facing the sunlight, also called the front side. The cell body 10 also has a backlight surface facing away from the sunlight, also called the back side.

[0069] It should be noted that the first direction H in the embodiment of the utility model can be the width direction of the battery cell body 10, and the second direction K can be the length direction of the battery cell body 10. The width of the battery cell body at least means the length from the top to the bottom of the battery cell body along the first direction H, or the width of the battery cell body theoretically claimed. The width of the battery cell body can range from 80 to 120 mm, and the length can range from 170 to 230 mm. Of course, the first direction H can also be the length direction of the battery cell body 10, and the second direction K can be the width direction of the battery cell body 10. In this regard, the utility model does not make specific restrictions. In actual applications, technicians can set it as needed. The following will take the first direction H as the width direction of the battery cell body 10 and the second direction K as the length direction of the battery cell body 10 as an example for relevant explanation.

[0070] like Figures 1 to 9 As shown, the insulating strip 30 can be arranged on the front side of the cell body 10 or the insulating strip 30 can be arranged on the back side of the cell body 10, and the insulating strip 30 also extends along the first direction H, and the overall extension length of the insulating strip 30 is adapted to the width of the cell body 10. For example, the overall extension length of the insulating strip 30 is less than or equal to the width of the cell body 10. Thus, the positive and negative electrodes of the solar cell can be blocked by the insulating strip 30, so as to avoid the positive and negative electrodes of the solar cell being turned on, which may cause a short circuit in the photovoltaic module.

[0071] like Figures 1 to 9 As shown, the insulating strip 30 in the embodiment of the utility model includes a plurality of insulating parts arranged at intervals along the first direction H. In the embodiment of the utility model, along the first direction H, the plurality of insulating parts are spaced apart, and the ratio of the sum of the lengths of the plurality of insulating parts to the width of the cell body 10 is set to be greater than or equal to 55% and less than 100%. Through the above-mentioned setting, the amount of insulating glue in the plurality of insulating strips 30 can be reduced, the shrinkage stress of the cell body 10 along the first direction H can be reduced, and the warping of the cell body 10 after the insulating glue covers the cell body 10 can be reduced, thereby reducing the cost of the photovoltaic module and improving the yield rate of subsequent photovoltaic module manufacturing.

[0072] For example, along the first direction H, the ratio of the sum of the lengths of the plurality of insulating portions to the width of the battery cell body 10 can be set to 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, 99% or a pairwise direct value, etc. For example, the ratio of the sum of the lengths of the plurality of insulating portions to the width of the battery cell body 10 can be set to be greater than or equal to 65% and less than 100%. The technician can reasonably set the size of the ratio according to actual needs, and the embodiment of the utility model does not impose too many restrictions on this.

[0073] Alternatively, if Figure 1 As shown, in the embodiment of the utility model, the battery cell body 10 is provided with multiple main grids, and the multiple main grids all extend along the first direction; the multiple main grids include a first main grid 21 and a second main grid 22, and the first main grid 21 and the second main grid 22 are arranged on the battery cell body 10 at intervals along the second direction K.

[0074] like Figures 1 to 9 As shown, it can be understood that a main grid is provided on the front or back of the cell body 10, and preferably, a plurality of main grids are provided on the back of the cell body 10. The main grid extends along the first direction H and is adapted to the width of the cell body 10. For example, the length of the main grid can be equal to the width of the cell body 10, and the length of the main grid can also be slightly less than the length of the cell body 10. In this way, the main grid and the fine grid of the back-contact solar cell are both provided on the back of the cell body 10, so that the main grid and the fine grid can reduce the shielding of the front of the cell body 10, thereby improving the photoelectric conversion efficiency of the photovoltaic module.

[0075] That is to say, the positive and negative grid lines of the solar cell in the embodiment of the utility model are both arranged on the front or back of the cell body 10, preferably on the back. Among them, the positive grid line includes a positive fine grid and a positive main grid, the positive fine grid can collect the current generated by the cell body 10, and the positive main grid can collect the current collected by the positive fine grid. The negative grid line includes a negative fine grid and a negative main grid, the negative fine grid can collect the current generated by the cell body 10, and the negative main grid can collect the current collected by the negative fine grid.

[0076] Furthermore, if Figure 1 As shown, the battery cell body 10 in the embodiment of the utility model is provided with a plurality of main grids, and the plurality of main grids extend along the first direction and are arranged at intervals along the second direction; the plurality of main grids include a first main grid 21 and a second main grid 22, and the first main grid 21 and the second main grid 22 are arranged at intervals along the second direction K on the battery cell body 10. Among them, the first main grid 21 can be a positive main grid, and the second main grid 22 can be a negative main grid. Of course, the first main grid 21 can also be a negative main grid, and the second main grid 22 can be a positive main grid. Exemplarily, the first main grid 21 can be a silver main grid; and / or, the second main grid 22 can be an aluminum main grid. In this regard, the utility model does not make specific restrictions, and in actual applications, technicians can set it as needed.

[0077] Alternatively, if Figure 1 As shown, the solar cell disclosed in the embodiment of the utility model is a back-contact solar cell; and / or, the plurality of insulating strips 30 include a first insulating strip 31 and a second insulating strip 32 .

[0078] Exemplarily, the solar cell disclosed in the embodiment of the utility model is a back-contact solar cell, which can improve the photoelectric conversion efficiency of the photovoltaic module. The multiple insulating strips 30 in the embodiment of the utility model also include a first insulating strip 31 and a second insulating strip 32. Among them, the first insulating strip 31 is distributed at least on both sides of the first main grid 21 along the second direction K, so as to block the positive and negative electrodes around the first main grid 21 through the first insulating strip 31, avoid the connection between the welding strip and the solar cell and / or the positive and negative electrodes between the positive and negative grid lines, resulting in a short circuit in the photovoltaic module. The second insulating strip 32 is distributed at least on both sides of the second main grid 22 along the second direction K, so as to block the positive and negative electrodes around the second main grid 22 through the second insulating strip 32, avoid the connection between the welding strip and the solar cell and / or the positive and negative electrodes between the positive and negative grid lines, resulting in a short circuit in the photovoltaic module.

[0079] Along the first direction H, the first insulating strip 31 of one battery cell is arranged alternately with the second insulating strip 32 of another adjacent battery cell, and the ratio of the sum of the lengths of the multiple insulating parts of the first insulating strip 31 to the width of the battery cell body 10 can be 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, 99%, etc., and the ratio of the sum of the lengths of the multiple insulating parts of the second insulating strip 32 to the width of the battery cell body 10 can also be 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, 99%, etc.

[0080] Accordingly, through the above-mentioned settings, the amount of insulating glue used in the first insulating strip 31 and the second insulating strip 32 of the back contact cell can be reduced, the shrinkage stress of the cell body 10 of the back contact cell along the first direction H can be reduced, and the warping of the cell body 10 after the insulating glue covers the cell body 10 of the back contact cell can be reduced, thereby reducing the cost of photovoltaic modules and improving the yield of subsequent photovoltaic module manufacturing.

[0081] Alternatively, if Figure 2 As shown, the first insulating strip 31 in the embodiment of the utility model includes a first insulating portion 311, a second insulating portion 312 and a third insulating portion 313, wherein the first insulating portion 311, the second insulating portion 312 and the third insulating portion 313 are arranged at intervals along the first direction H; the first insulating portion 311, the second insulating portion 312 and the third insulating portion 313 are each provided with a plurality, and along the first direction H, the ratio of the sum of the lengths of the plurality of first insulating portions 311, the plurality of second insulating portions 312 and the plurality of third insulating portions 313 to the width of the battery body 10 is greater than or equal to 50% and less than or equal to 95%.

[0082] like Figure 2As shown, in an embodiment of the utility model, a plurality of first insulating parts 311, a plurality of second insulating parts 312 and a plurality of third insulating parts 313 are arranged at intervals along a first direction H, and the plurality of first insulating parts 311, a plurality of second insulating parts 312 and a plurality of third insulating parts 313 arranged at intervals can be used to at least form a first insulating strip 31.

[0083] Furthermore, in the embodiment of the utility model, along the first direction H, the ratio of the sum of the lengths of the plurality of first insulating parts 311, the plurality of second insulating parts 312, and the plurality of third insulating parts 313 to the width of the battery body 10 is set to be greater than or equal to 50% and less than or equal to 95%. This reduces the amount of insulating glue in the first insulating strip 31, reduces the warping of the battery body 10 after the insulating glue covers the battery body 10, thereby reducing the cost of the photovoltaic module and improving the yield of subsequent photovoltaic module manufacturing.

[0084] Exemplarily, along the first direction H, the ratio of the sum of the lengths of the plurality of first insulating parts 311, the plurality of second insulating parts 312 and the plurality of third insulating parts 313 to the width of the battery cell body 10 can be set to 50%, 60%, 70%, 80%, 90%, 95%, etc.

[0085] It should be noted that the first insulating portion 311, the second insulating portion 312 and the third insulating portion 313 in the embodiment of the utility model can be provided with multiple. In the embodiment of the utility model, there are no excessive restrictions on the specific arrangement of the multiple first insulating portions 311, the multiple second insulating portions 312 and the multiple third insulating portions 313. Exemplarily, the second insulating portion 312 is located between the first insulating portion 311 and the third insulating portion 313, the second insulating portion 312 is located between two adjacent third insulating portions 313, the third insulating portion 313 is located between two adjacent second insulating portions 312, and the first insulating portion 311, the second insulating portion 312 and the third insulating portion 313 are provided with two, seven and six respectively. In actual applications, technicians can set it as needed.

[0086] Alternatively, if Figure 3As shown, the first insulating portion 311 in the embodiment of the utility model includes a first sub-insulating portion 311A, a second sub-insulating portion 311B and a third sub-insulating portion 311C, wherein the first sub-insulating portion 311A ​​is in a U-shaped structure, the second sub-insulating portion 311B and the third sub-insulating portion 311C are both in a strip structure and extend along the second direction K; along the first direction H, the middle area of ​​the second sub-insulating portion 311B is connected to one side of the first sub-insulating portion 311A, and there is a gap between the two ends of the second sub-insulating portion 311B and the first sub-insulating portion 311A; along the first direction H, the middle area of ​​the third sub-insulating portion 311C is connected to the other side of the first sub-insulating portion 311A, and there is a gap between the two ends of the third sub-insulating portion 311C and the first sub-insulating portion 311A.

[0087] In the embodiment of the utility model, Figure 3 As shown, the first insulating portion 311 in the embodiment of the utility model includes a first sub-insulating portion 311A, a second sub-insulating portion 311B and a third sub-insulating portion 311C. Among them, along the first direction H, the second sub-insulating portion 311B is arranged on one side of the first sub-insulating portion 311A, and the third sub-insulating portion 311C is arranged on the other side of the first sub-insulating portion 311A. The second sub-insulating portion 311B and the third sub-insulating portion 311C are both strip structures, and the second sub-insulating portion 311B and the third sub-insulating portion 311C of the strip structure extend along the second direction K. Along the first direction H, the middle area of ​​the second sub-insulating portion 311B is connected to one side of the first sub-insulating portion 311A, and there is a gap between the two ends of the second sub-insulating portion 311B and the first sub-insulating portion 311A. Along the first direction H, the middle area of ​​the third sub-insulating portion 311C is connected to the other side of the first sub-insulating portion 311A, and there is a gap between the two ends of the third sub-insulating portion 311C and the first sub-insulating portion 311A. Along the first direction H, the second sub-insulating portion 311B, the first sub-insulating portion 311A, and the third sub-insulating portion 311C prevent the welding strip from being connected to the solar cell and / or the positive and negative poles from being connected between the positive and negative pole grid lines, thereby preventing the photovoltaic module from being short-circuited.

[0088] Optionally, a first connection point is provided on the battery cell body 10 in the embodiment of the utility model, and the first sub-insulating portion 311A ​​surrounds the first connection point. Exemplarily, the first connection point can also be a pad. The first connection point is connected to the welding strip 40, so that the current collected by the first main grid 21 is collected and transmitted through the welding strip.

[0089] like Figure 3As shown, the first sub-insulating portion 311A ​​is a U-shaped structure, and the U-shaped first sub-insulating portion 311A ​​surrounds the first connection point. Thus, the U-shaped first sub-insulating portion 311A ​​blocks the positive and negative electrodes around the first connection point, preventing the positive and negative electrodes from being connected when the welding ribbon is interconnected with the solar cell, thereby preventing the photovoltaic module from short-circuiting.

[0090] Alternatively, if Figure 3 As shown, the first insulating portion 311 in the embodiment of the utility model may also include a first convex portion 311D and a second convex portion 311E, wherein the first convex portion 311D is connected to a side of the second sub-insulating portion 311B away from the first sub-insulating portion 311A, and the second convex portion 311E is connected to a side of the third sub-insulating portion 311C away from the first sub-insulating portion 311A. On the plane where the battery cell body 10 is located, the projection of the first convex portion 311D and / or the projection of the second convex portion 311E at least partially overlaps with the projection of the first main grid 21.

[0091] like Figure 3 As shown, in the embodiment of the utility model, the first convex portion 311D is connected to the side of the second sub-insulating portion 311B away from the first sub-insulating portion 311A, and the second convex portion 311E is connected to the side of the third sub-insulating portion 311C away from the first sub-insulating portion 311A. Further, on the plane where the battery cell body 10 is located, the projection of the first convex portion 311D and the projection of the second convex portion 311E are set to at least partially overlap with the projection of the first main grid 21, which can avoid the positive and negative poles between the positive and negative grid lines from being connected, resulting in a short circuit in the photovoltaic module.

[0092] It should be noted that, in the embodiment of the present invention, along the first direction H, the length from the uppermost side of the first convex portion 311D to the lowermost side of the second convex portion 311E, that is, Figure 3 As shown in FIG. 1 , the length L11 is the length from the lowest point A1 on the upper side of the second sub-insulating portion 311B to the highest point A2 on the lower side of the third sub-insulating portion 311C along the first direction H. In other words, Figure 3 As shown in FIG. 1 , the length L12 is the length from the highest point A3 on the upper side of the second sub-insulating portion 311B to the lowest point A4 on the lower side of the third sub-insulating portion 311C along the first direction H. In other words, Figure 3 As shown, the length of L13. Accordingly, it should be noted that the length of the first insulating portion 311 can at least mean: length L11, or length L12, or length L13, or half of the sum of length L11 and length L12, or half of the sum of length L12 and length L13, etc.

[0093] Alternatively, if Figure 4As shown, the second insulating part 312 in the embodiment of the present utility model includes a fifth sub-insulating part 312B and a sixth sub-insulating part 312C. Along the second direction K, the fifth sub-insulating part 312B and the sixth sub-insulating part 312C are arranged oppositely; there are multiple fifth sub-insulating parts 312B and multiple sixth sub-insulating parts 312C, and the multiple fifth sub-insulating parts 312B and the multiple sixth sub-insulating parts 312C are arranged at intervals along the first direction H.

[0094] As Figure 4 As shown, the second insulating part 312 includes a fifth sub-insulating part 312B and a sixth sub-insulating part 312C. Along the second direction K, the fifth sub-insulating part 312B and the sixth sub-insulating part 312C are arranged oppositely; there are multiple fifth sub-insulating parts 312B and multiple sixth sub-insulating parts 312C, and the multiple fifth sub-insulating parts 312B and the multiple sixth sub-insulating parts 312C are arranged at intervals along the first direction H. In this way, the amount of insulating glue in the second insulating part 312 can be reduced, the warping of the battery cell body 10 after the insulating glue covers the battery cell body 10 can be reduced, thereby reducing the cost of the photovoltaic module, and the yield of subsequent photovoltaic module manufacturing can also be improved.

[0095] Optionally, along the first direction H, the interval p1 between two adjacent fifth sub-insulating parts 312B and the interval p2 between two adjacent sixth sub-insulating parts 312C satisfy: 0mm < p1 ≤ 3mm, 0mm < p2 ≤ 3mm.

[0096] Exemplarily, the multiple fifth sub-insulating parts 312B and the multiple sixth sub-insulating parts 312C are arranged at intervals along the first direction H. Along the first direction H, the distance between two adjacent fifth sub-insulating parts 312B is p1, satisfying 0mm < p1 ≤ 3mm, and the distance between two adjacent sixth sub-insulating parts 312C is p2, satisfying 0mm < p2 ≤ 3mm.

[0097] Specifically, p1 can be the maximum interval length or the minimum interval length between two adjacent fifth sub-insulating parts 312B along the first direction H, and p2 can be the maximum interval length or the minimum interval length between two adjacent sixth sub-insulating parts 312C along the first direction H. Specifically, the value of the interval p1 can be 0.5mm, 1.0mm, 1.5mm, 2.0mm, 2.5mm, 3.0mm, and the value of the interval p2 can be 0.5mm, 1.0mm, 1.5mm, 2.0mm, 2.5mm, 3.0mm. In actual applications, technicians can set according to needs.

[0098] Optionally, as Figure 4As shown, the solar cell is also provided with a fourth sub-insulating portion 312A, and the fourth sub-insulating portion 312A is arranged on the cell body 10. Along the second direction K, the fifth sub-insulating portion 312B and the sixth sub-insulating portion 312C are located on both sides of the fourth sub-insulating portion 312A. Along the first direction H, the fifth sub-insulating portion 312B and the sixth sub-insulating portion 312C are staggered with the fourth sub-insulating portion 312A.

[0099] like Figure 4 As shown, the solar cell also includes a fourth sub-insulating portion 312A, which can be arranged on the back of the cell body 10; the fourth sub-insulating portion 312A is provided with a plurality of fourth sub-insulating portions 312A, which are arranged at intervals along the first direction H and are all arranged on the cell body 10. Along the second direction K, the fifth sub-insulating portion 312B is located on one side of the fourth sub-insulating portion 312A, and the sixth sub-insulating portion 312C is located on the other side of the fourth sub-insulating portion 312A. In addition, along the second direction K, a fifth sub-insulating portion 312B can be arranged opposite to a sixth sub-insulating portion 312C, and staggered with a fourth sub-insulating portion 312A. So that the fifth sub-insulating portion 312B and the sixth sub-insulating portion 312C can prevent the welding strip 40 from being connected to the solar cell and / or the positive and negative poles from being connected between the positive and negative pole grid lines, resulting in a short circuit in the photovoltaic module.

[0100] Optionally, on the plane where the cell body 10 is located, the projection of the fourth sub-insulating portion 312A at least partially overlaps with the projection of the first main grid 21 .

[0101] like Figure 4 As shown, the solar cell in the embodiment of the utility model includes a fourth sub-insulating portion 312A. Among them, on the plane where the solar cell body 10 is located, the projection of the fourth sub-insulating portion 312A at least partially overlaps with the projection of the first main grid 21, and correspondingly, the projection of the fourth sub-insulating portion 312A at least partially overlaps with the welding strip 40. In this way, it can be avoided that the positive and negative grid lines are connected and / or the welding strip is connected to the grid line with different polarity, resulting in a short circuit in the photovoltaic module.

[0102] Alternatively, if Figure 4 As shown, in the embodiment of the utility model, along the direction extending from the fifth sub-insulating portion 312B to the sixth sub-insulating portion 312C, the width of the fifth sub-insulating portion 312B gradually increases; along the direction extending from the sixth sub-insulating portion 312C to the fifth sub-insulating portion 312B, the width of the sixth sub-insulating portion 312C gradually increases.

[0103] like Figure 4As shown, along the direction from the fifth sub-insulating portion 312B to the sixth sub-insulating portion 312C, the width of the fifth sub-insulating portion 312B gradually increases. That is to say, along the direction from the sixth sub-insulating portion 312C to the fifth sub-insulating portion 312B, the width of the fifth sub-insulating portion 312B gradually decreases. This is to reduce the amount of insulating glue in the fifth sub-insulating portion 312B and reduce the warping of the battery cell after the insulating glue covers the battery cell, thereby reducing the cost of the photovoltaic module and improving the yield of subsequent photovoltaic module manufacturing. It should be noted that the width of the fifth sub-insulating portion 312B can at least be understood as: the numerical value of the length of the fifth sub-insulating portion 312B along the first direction H.

[0104] like Figure 4 As shown, along the direction from the sixth sub-insulating portion 312C to the fifth sub-insulating portion 312B, the width of the sixth sub-insulating portion 312C gradually increases. That is to say, along the direction from the fifth sub-insulating portion 312B to the sixth sub-insulating portion 312C, the width of the sixth sub-insulating portion 312C gradually decreases. Thus, the amount of insulating glue in the sixth sub-insulating portion 312C can be reduced, and the warping of the battery cell after the insulating glue covers the battery cell can be reduced, thereby reducing the cost of the photovoltaic module and improving the yield of subsequent photovoltaic module manufacturing. It should be noted that the width of the sixth sub-insulating portion 312C can at least be understood as: the numerical value of the length of the sixth sub-insulating portion 312C along the first direction H.

[0105] Alternatively, if Figure 4 As shown, the fourth sub-insulating portion 312A in the embodiment of the utility model is in a strip structure. Along the first direction H, the center line of the fourth sub-insulating portion 312A coincides with the symmetry line between two adjacent fifth sub-insulating portions 312B or two adjacent sixth sub-insulating portions 312C.

[0106] like Figure 4 As shown, in an embodiment of the utility model, the fourth sub-insulating portion 312A can be a strip structure, and along the first direction H, the center line of the fourth sub-insulating portion 312A is set to coincide with the symmetry line between two adjacent fifth sub-insulating portions 312B or two adjacent sixth sub-insulating portions 312C, so as to facilitate the connection of gate lines of two polarities.

[0107] It should be noted that in the present utility model application, the length of the second insulating portion 312 along the first direction H can at least be understood as: the sum of the lengths of multiple fifth sub-insulating portions 312B along the first direction H, or the sum of the lengths of multiple sixth sub-insulating portions 312C along the first direction H. Exemplarily, that is, along the first direction H, the length L211 (e.g., the length of the fifth sub-insulating portion 312B extending from the highest point B1 at the top to the lowest point B2 at the bottom of the fifth sub-insulating portion 312B at the bottom) is Figure 4) minus the length of the corresponding multiple intervals p1 (in this case, p1 may correspond to the minimum interval length p1min) to obtain the length L312B1, or the length L212 (such as the length L212B1 obtained by subtracting the length of the corresponding multiple intervals p1 (in this case, p1 may correspond to the minimum interval length p1min) from the lowest point B3 of the uppermost fifth sub-insulating portion 312B to the highest point B4 of the lowermost fifth sub-insulating portion 312B at the lowermost end) Figure 4 ) minus the length of the corresponding multiple intervals p1 (in this case, p1 may correspond to the maximum interval length p1max) to obtain the length L312B2, or the length L221 (such as the length L221 extending from the highest point C1 of the uppermost sixth sub-insulating portion 312C to the lowest point C2 of the lowermost sixth sub-insulating portion 312C) at the lowermost end. Figure 4 ) minus the length of the corresponding multiple intervals p2 (in this case, p2 may correspond to the minimum interval length p2min) to obtain the length L312C1, or the length L222 (such as the length L222 extending from the lowest point C3 of the uppermost sixth sub-insulating portion 312C to the highest point C4 of the lowermost sixth sub-insulating portion 312C) at the lowermost sixth sub-insulating portion 312C. Figure 4 The length L312C2 obtained by subtracting the length of the corresponding multiple intervals p2 (in this case, p2 may correspond to the maximum interval length p2max) from the length L312B1, that is, the length of the second insulating portion 312 may at least mean: length L312B1, or length L312B2, or length L312C1, or length L312C2, or a value between length L312B2 and length L312B1, or a value between length L312C2 and length L312C1. It should be noted that the number of the above intervals corresponds to the number of the fifth sub-insulating portion 312B or the number of the sixth sub-insulating portion 312C.

[0108] Alternatively, if Figure 5 As shown, the third insulating portion 313 in the embodiment of the utility model includes an eighth sub-insulating portion 1 313B1 and an eighth sub-insulating portion 2 313B2, and the eighth sub-insulating portion 1 313B1 and the eighth sub-insulating portion 2 313B2 are provided in plurality; along the first direction H, the plurality of eighth sub-insulating portions 1 313B1 and the plurality of eighth sub-insulating portions 2 313B2 are arranged at intervals, and along the second direction K, the eighth sub-insulating portion 1 313B1 and the eighth sub-insulating portion 2 313B2 are arranged opposite to each other; the eighth sub-insulating portion 1 313B1 and the eighth sub-insulating portion 2 313B2 are arranged opposite to each other; The second edge portion 313B2 is a Z-shaped structure; and / or, the solar cell is further provided with a seventh sub-insulating portion 313A, and a plurality of the seventh sub-insulating portions 313A are provided, and all are in a strip-shaped structure, and the plurality of seventh sub-insulating portions 313A extend along the first direction H and are arranged at intervals along the first direction H; along the second direction K, the eighth sub-insulating portion 1 313B1 and the eighth sub-insulating portion 2 313B2 are located on both sides of a seventh sub-insulating portion 313A, and the eighth sub-insulating portion 1 313B1 and the eighth sub-insulating portion 2 313B2 are symmetrically distributed.

[0109] Specifically, the third insulating portion 313 includes an eighth sub-insulating portion one 313B1 and an eighth sub-insulating portion two 313B2. The solar cell further includes a seventh sub-insulating portion 313A. There may be two seventh sub-insulating portions 313A, both of which are strip-shaped structures. The two seventh sub-insulating portions 313A both extend along the first direction H and are arranged at intervals along the first direction H. The eighth sub-insulating portion one 313B1 may include two, and the eighth sub-insulating portion two 313B2 may include two, both of which are Z-shaped structures. Along the second direction K, one eighth sub-insulating portion one 313B1 and one eighth sub-insulating portion two 313B2 are located on both sides of one seventh sub-insulating portion 313A, and the other eighth sub-insulating portion one 313B1 and the other eighth sub-insulating portion two 313B2 are located on both sides of the other seventh sub-insulating portion 313A. Along the extension line formed by the two seventh sub-insulating portions 313A, the eighth sub-insulating portion one 313B1 and the eighth sub-insulating portion two 313B2 located on both sides of one seventh sub-insulating portion 313A are symmetrically distributed, and the eighth sub-insulating portion one 313B1 and the eighth sub-insulating portion two 313B2 located on both sides of the other seventh sub-insulating portion 313A are symmetrically distributed.

[0110] Through the above settings, the amount of insulating glue in the third insulating portion 313 can be reduced, thereby reducing the cost of the photovoltaic module. Further, a rectangular frame structure can be formed by enclosing the two seventh sub-insulating portions 313A and the third insulating portion 313. The third insulating portion 313 of the rectangular frame structure can surround a connection point of the first main grid 21, so as to better block the positive and negative electrodes around the connection point, and avoid the positive and negative electrodes being conducted between the solder ribbon and the solar cell connection and / or between the positive and negative electrode grid lines, resulting in a short circuit phenomenon of the photovoltaic module.

[0111] Optionally, along the first direction H, adjacent two eighth sub-insulating portions one 313B1 are symmetrically distributed, adjacent two eighth sub-insulating portions two 313B2 are symmetrically distributed, the interval t1 between adjacent two eighth sub-insulating portions one 313B1 and the interval t2 between adjacent two eighth sub-insulating portions two 313B2 satisfy: 0mm < t1 ≤ 2mm, 0mm < t2 ≤ 2mm.

[0112] Exemplarily, multiple eighth sub-insulating portions one 313B1 and multiple eighth sub-insulating portions two 313B2 are arranged at intervals along the first direction H. Adjacent two eighth sub-insulating portions one 313B1 may be symmetrically distributed up and down, and adjacent two eighth sub-insulating portions two 313B2 may be symmetrically distributed up and down. Along the first direction H, the interval distance t1 between adjacent two eighth sub-insulating portions one 313B1 satisfies 0mm < t1 ≤ 2mm, and the interval distance t2 between adjacent two eighth sub-insulating portions two 313B2 satisfies 0mm < t2 ≤ 2mm.

[0113] Specifically, t1 may be the maximum interval length or the minimum interval length between two adjacent eighth sub-insulating portions 1 313B1 along the first direction H, and t2 may be the maximum interval length or the minimum interval length between two adjacent eighth sub-insulating portions 2 313B2 along the first direction H. Specifically, the interval t1 value may be 0.5 mm, 1.0 mm, 1.5 mm, 2.0 mm, and the interval t2 value may be 0.5 mm, 1.0 mm, 1.5 mm, 2.0 mm. In actual applications, technicians may set it as needed.

[0114] It should be noted that, in the present utility model application, the length of the third insulating portion 313 along the first direction H can at least be understood as: the sum of the lengths of multiple eighth sub-insulating portions 313B1 along the first direction H, or the sum of the lengths of multiple eighth sub-insulating portions 313B2, illustratively, that is, along the first direction H, the length L311 of the highest point D1 of the uppermost eighth sub-insulating portion 313B1 extending to the lowest point D2 of the lowermost eighth sub-insulating portion 313B1 (such as Figure 5 ) minus the length of the corresponding multiple intervals t1 (in this case, it corresponds to one interval, and t1 can correspond to the minimum interval length) to obtain the length L313B11, or the length L312 (such as the length L312 from the lowest point D3 of the uppermost eighth sub-insulating portion 313B1 to the highest point D4 of the lowermost eighth sub-insulating portion 313B1) at the lowermost end. Figure 5 ) minus the length of the corresponding multiple intervals t1 (in this case, it corresponds to one interval, and t1 can correspond to the maximum interval length) to obtain the length L313B12, or the length L321 (such as the length L321 from the highest point E1 of the uppermost eighth sub-insulating portion 313B2 to the lowest point E2 of the lowermost eighth sub-insulating portion 313B2) Figure 5 ) minus the length of the corresponding multiple intervals t2 (in this case, it corresponds to one interval, and t2 may correspond to the minimum interval length) to obtain the length L313B21, or the length L322 (such as the length L322 extending from the lowest point E3 of the uppermost eighth sub-insulating portion 313B2 to the highest point E4 of the lowermost eighth sub-insulating portion 313B2) of the lowermost eighth sub-insulating portion 313B2. Figure 5The length L313B22 is obtained by subtracting the length of the corresponding multiple intervals t2 (in this case, it corresponds to 1 interval, and t2 can correspond to the maximum interval length) from the length L313B11. Accordingly, the length of the third insulating portion 313 can at least mean: length L313B11, or length L313B12, or length L313B21, or length L313B22, or a value between length L313B12 and length L313B11, or a value between length L313B22 and length L313B21. It should be noted that the number of intervals corresponds to the number of the eighth sub-insulating portion 1 313B1 or the eighth sub-insulating portion 2 313B2.

[0115] In some embodiments, based on the above-mentioned lengths of the first insulating portion 311, the second insulating portion 312, and the third insulating portion 313, the length of the first insulating strip 31 at least means: along the first direction H, the sum of the lengths of multiple first insulating portions 311, the lengths of multiple second insulating portions 312, and the lengths of multiple third insulating portions 313, which can be reasonably understood based on actual conditions, such as the above-mentioned situations of being greater than or equal to 55% and less than 100%, greater than or equal to 65% and less than 100%, etc., so that at least the length of the first insulating strip 31 can be clearly determined, thereby facilitating the calculation of the ratio of the length of the first insulating strip 31 to the width of the battery cell body.

[0116] Alternatively, if Figure 6 As shown, the second insulating strip 32 in the embodiment of the utility model includes a fourth insulating part 321, a fifth insulating part 322 and a sixth insulating part 323, wherein the fourth insulating part 321, the fifth insulating part 322 and the sixth insulating part 323 are arranged at intervals along the first direction H; the fourth insulating part 321, the fifth insulating part 322 and the sixth insulating part 323 are each provided with a plurality, and along the first direction H, the ratio of the sum of the lengths of the plurality of fourth insulating parts 321, the plurality of fifth insulating parts 322 and the plurality of sixth insulating parts 323 to the width of the battery cell body 10 is greater than or equal to 50% and less than or equal to 95%.

[0117] like Figure 6As shown, in the embodiment of the utility model, a plurality of fourth insulating parts 321, a plurality of fifth insulating parts 322 and a plurality of sixth insulating parts 323 are arranged at intervals along the first direction H, so that at least the plurality of fourth insulating parts 321, a plurality of fifth insulating parts 322 and a plurality of sixth insulating parts 323 arranged at intervals are used to form a second insulating strip 32. In addition, along the first direction H, the ratio of the sum of the lengths of the plurality of fourth insulating parts 321, a plurality of fifth insulating parts 322 and a plurality of sixth insulating parts 323 to the width of the cell body 10 is set to be greater than or equal to 50% and less than or equal to 95%. In order to reduce the amount of insulating glue in the second insulating strip 32, reduce the warping of the cell body 10 after the insulating glue covers the cell body 10, thereby reducing the cost of the photovoltaic module and improving the yield of subsequent photovoltaic module manufacturing.

[0118] Exemplarily, along the first direction H, the ratio of the sum of the lengths of the plurality of fourth insulating parts 321, the plurality of fifth insulating parts 322 and the plurality of sixth insulating parts 323 to the width of the battery cell body 10 can be set to 50%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, etc.

[0119] It should be noted that the fourth insulating portion 321, the fifth insulating portion 322 and the sixth insulating portion 323 in the embodiment of the utility model can be provided with multiple. In the embodiment of the utility model, there are no excessive restrictions on the specific arrangement of the fourth insulating portion 321, the fifth insulating portion 322 and the sixth insulating portion 323. Specifically, the fifth insulating portion 322 is located between the fourth insulating portion 321 and the sixth insulating portion 323, the fifth insulating portion 322 is located between two adjacent sixth insulating portions 323, the sixth insulating portion 323 is located between two adjacent fifth insulating portions 322, and the fourth insulating portion 321, the fifth insulating portion 322 and the sixth insulating portion 323 are provided with two, seven and six respectively. In actual applications, technicians can set it as needed.

[0120] Alternatively, if Figure 7 As shown, the fourth insulating portion 321 in the embodiment of the utility model includes a sub-insulating portion 321A, the sub-insulating portion 321A is in a U-shaped structure, and a plurality of third protrusions 321B are arranged at intervals on the bottom wall 321C of the U-shaped sub-insulating portion 321A; the sub-insulating portion 321A includes two sub-insulating portions 321A, which are arranged at intervals along the second direction K, and the opening of one sub-insulating portion 321A faces the opening of the other sub-insulating portion 321A.

[0121] like Figure 7As shown, in the embodiment of the utility model, a plurality of third protrusions 321B are arranged at intervals on the bottom wall 321C of the U-shaped sub-insulating portion 1 321A to improve the reliability of the insulation of the sub-insulating portion 1 321A. Furthermore, the amount of insulating glue in the sub-insulating portion 1 321A can be reduced, and the warping of the cell body 10 after the insulating glue covers the cell body 10 can be reduced, thereby reducing the cost of the photovoltaic module.

[0122] In addition, in the embodiment of the utility model, along the second direction K, two sub-insulating parts 321A are spaced apart, and the opening of one sub-insulating part 321A faces the opening of the other sub-insulating part 321A. Thus, the fourth insulating part 321 of the U-shaped structure can be enclosed by the two sub-insulating parts 321A. The fourth insulating part 321 of the U-shaped structure can surround a connection point of the second main grid 22, so as to better block the positive and negative electrodes around the connection point, and prevent the positive and negative electrodes from being turned on, resulting in a short circuit in the photovoltaic module.

[0123] It should be noted that, in the embodiment of the present invention, along the first direction H, the length from the uppermost side of the sub-insulating portion 1 321A to the lowermost side of the sub-insulating portion 1 321A, that is, Figure 7 As shown, the length of L4. Accordingly, the length of the first insulating portion 311 can be the length L4. Of course, similarly, based on the above-mentioned length calculation method of the first insulating portion, the length of the first insulating portion 311 can also be the length value along the first direction H, from the lowest point on the upper side of the sub-insulating portion 1 321A to the highest point on the lower side of the sub-insulating portion 1 321A.

[0124] Alternatively, if Figure 7 and Figure 8 As shown, the fifth insulating part 322 and the sixth insulating part 323 in the embodiment of the utility model both include a plurality of groups of sub-insulating parts 322A arranged at intervals along the first direction H, and each group of sub-insulating parts 322A includes two insulating sub-parts 322AA arranged at intervals along the second direction K; each insulating sub-part 322AA is a strip structure, and the length direction of the strip structure is the second direction K.

[0125] like Figure 7 As shown, in order to reduce the amount of insulating glue in the fifth insulating part 322 and the sixth insulating part 323. In the embodiment of the utility model, the fifth insulating part 322 and the sixth insulating part 323 are both configured to include multiple groups of sub-insulating parts 322A, and the multiple groups of sub-insulating parts 322A are arranged at intervals along the first direction H.

[0126] Among them, each group of sub-insulating parts two 322A includes two insulator parts 322AA arranged at intervals along the second direction K. The two insulator parts 322AA can be exactly the same or completely different. Each insulator part 322AA has a strip structure, and the length direction of the strip-structured insulator part 322AA is the second direction K, so that it can better cover the grid lines (such as fine aluminum grid lines) and avoid leakage caused by fine aluminum grid lines (such as aluminum thorns). At the same time, the two insulator parts 322AA in each group of sub-insulating parts two 322A can also block the positive and negative poles around the second main grid 22, avoiding the conduction of the positive and negative poles between the solder tape and the solar cell and / or between the positive and negative grid lines, resulting in a short circuit phenomenon in the photovoltaic module.

[0127] Optionally, in the fifth insulating part 322, along the first direction H, the distance between two adjacent insulator parts 322AA is m1, satisfying: 0mm < m1 ≤ 2mm; in the sixth insulating part 323, along the first direction H, the distance between two adjacent insulator parts 322AA is m2, satisfying: 0mm < m2 ≤ 2mm.

[0128] Exemplarily, in the fifth insulating part 322 and the sixth insulating part 323, the two insulator parts 322AA arranged at intervals along the second direction K are symmetrically distributed. In the fifth insulating part 322, along the first direction H, the distance between two adjacent insulator parts 322AA is m1, satisfying 0mm < m1 ≤ 2mm. In the sixth insulating part 323, along the first direction H, the distance between two adjacent insulator parts 322AA is m2, satisfying 0mm < m2 ≤ 2mm.

[0129] Specifically, in the fifth insulating part 322 and the sixth insulating part 323, m1 and m2 can both be the maximum or minimum interval length between two adjacent insulator parts 322AA along the first direction H. Specifically, the value of the interval m1 can be 0.5mm, 1.0mm, 1.5mm, 2.0mm, and the value of the interval m2 can be 0.5mm, 1.0mm, 1.5mm, 2.0mm. In actual applications, technicians can set according to needs.

[0130] In the application of the present utility model, along the first direction H, the length of the fifth insulating part 322 can be at least understood as: along the first direction H, the sum of the lengths of multiple insulator parts 322AA. Exemplarily, that is: along the first direction H, the length L51 from the highest point F1 on the uppermost side of the fifth insulating part 322 to the lowest point F2 on the lowermost side of the fifth insulating part 322 (such as Figure 8) minus the length of the corresponding multiple intervals m1 (in this case, m1 may correspond to the minimum interval length) to obtain the length L322A1, or the length L52 (such as the length L52 extending from the lowest point F3 on the upper side of the fifth insulating portion 322 to the highest point F4 on the lower side of the fifth insulating portion 322) Figure 8 The length L322A2 is obtained by subtracting the length of the corresponding multiple intervals m1 (in this case, m1 may correspond to the maximum interval length) from the length L322A1. Accordingly, the length of the fifth insulating portion 322 may at least mean: the length L322A1, or the length L322A2, or a value between the length L322A2 and the length L322A1. It should be noted that in the fifth insulating portion 322, the number of the above intervals corresponds to the number of the insulator portions 322AA.

[0131] In the present utility model application, the length of the sixth insulating portion 323 along the first direction H can be understood as at least: the sum of the lengths of the plurality of insulator portions 322AA along the first direction H, exemplarily, that is, the length L61 extending from the highest point G1 on the upper side of the sixth insulating portion 323 to the lowest point G2 on the lower side of the sixth insulating portion 323 (e.g. Fig. 9 ) minus the length of the corresponding multiple intervals m2 (in this case, m2 may correspond to the minimum interval length) to obtain the length L322A3, or the length L62 (such as the length L62 extending from the lowest point G3 on the upper side of the sixth insulating portion 323 to the highest point G4 on the lower side of the sixth insulating portion 323) Fig. 9 The length L322A4 is obtained by subtracting the length of the corresponding multiple intervals m2 (in this case, m2 may correspond to the maximum interval length) from the length L322A4 of the sixth insulating portion 323. Accordingly, the length of the sixth insulating portion 323 may at least mean: the length L322A3, or the length L322A4, or a value between the length L322A4 and the length L322A3. It should be noted that in the sixth insulating portion 323, the number of the above intervals also corresponds to the number of the insulator portions 322AA.

[0132] Through the above settings, the amount of insulating glue used in each insulator part 322AA can be further reduced, thereby further reducing the warping of the battery cell after the insulating glue covers the battery cell, thereby reducing the cost of the photovoltaic module and improving the yield of subsequent photovoltaic module manufacturing.

[0133] Optionally, along the second direction K, in the fifth insulating part 322, there is a first gap between the two insulator parts 322AA in each group of sub-insulating part two 322A, and in the sixth insulating part 323, there is a second gap between the two insulator parts 322AA in each group of sub-insulating part two 322A, wherein the second gap is larger than the first gap.

[0134] Through the above-mentioned setting, the sixth insulating part 323 can be distributed on both sides of a connection point of the second main grid 22 along the second direction K, so that the sixth insulating part 323 can better block the positive and negative electrodes around the connection point, avoiding the connection between the welding strip and the solar cell and / or the positive and negative electrodes being conductive between the positive and negative grid lines, resulting in a short circuit in the photovoltaic module.

[0135] In some embodiments, based on the above-mentioned lengths of the fourth insulating portion 321, the fifth insulating portion 322, and the sixth insulating portion 323, the length of the second insulating strip 32 at least includes: the sum of the lengths of multiple fourth insulating portions 321, the lengths of multiple fifth insulating portions 322, and the lengths of multiple sixth insulating portions 323, which can be reasonably understood based on actual conditions, such as the above-mentioned situations of being greater than or equal to 55% and less than 100%, greater than or equal to 65% and less than 100%, etc., so that the length of the second insulating strip 32 can be at least clearly determined, thereby facilitating the calculation of the ratio of the length of the second insulating strip 32 to the width of the battery cell body.

[0136] Alternatively, if Figure 1 As shown, the first insulating strip 31 also includes: a first end insulating portion 314 and a second end insulating portion 315, and the second insulating strip 32 may also include: a third end insulating portion 324 and a fourth end insulating portion 325. Along the first direction H, the second end insulating portion 315 of the first insulating strip 31 on one battery cell body 10 is arranged opposite to the third end insulating portion 324 of the second insulating strip 32 on another adjacent battery cell body 10, and the first end insulating portion 314 of the first insulating strip 31 on the other battery cell body 10 is arranged opposite to the fourth end insulating portion 325 of the second insulating strip 32 on the adjacent battery cell body 10.

[0137] The first end insulating portion 314, the second end insulating portion 315, the third end insulating portion 324, and the fourth end insulating portion 325 are at least understood as: insulating portions along the first direction H, close to the edges of the long sides of the battery cell body 10 on both sides. The first insulating strip 31 may also include: a first end insulating portion 314 and a second end insulating portion 315. The second insulating strip 32 may also include: a third end insulating portion 324 and a fourth end insulating portion 325. Along the first direction H, the second end insulating portion 315 of the first insulating strip 31 on one battery cell body 10 is arranged opposite to the third end insulating portion 324 of the second insulating strip 32 on another adjacent battery cell body 10, and the first end insulating portion 314 of the first insulating strip 31 on another battery cell body 10 is arranged opposite to the fourth end insulating portion 325 of the second insulating strip 32 on an adjacent battery cell body 10, which is used to insulate the connection between the welding strip and the battery cell when the welding strip crosses the border to connect two adjacent battery cells.

[0138] In some embodiments, the first end insulating portion 314 includes a plurality of spaced end insulating portions 1; and / or, the second end insulating portion 315 includes a plurality of spaced end insulating portions 2; and / or, the third end insulating portion 324 includes a plurality of spaced end insulating portions 3; and / or, the fourth end insulating portion 325 includes a plurality of spaced end insulating portions 4. In this way, the amount of insulating glue in the first insulating strip 31 and the second insulating strip 32 can be further reduced, and the warping of the cell body 10 after the insulating glue covers the cell body 10 can be reduced, thereby reducing the cost of the photovoltaic module and improving the yield rate of subsequent photovoltaic module manufacturing.

[0139] It should be noted that the lengths of the first end insulating portion 314, the second end insulating portion 315, the third end insulating portion 324, and the fourth end insulating portion 325 at least mean: along the first direction H, the length of the first end insulating portion 314 from the uppermost side to the lowermost side minus the lengths of its own multiple intervals, the length of the second end insulating portion 315 from the uppermost side to the lowermost side minus the lengths of its own multiple intervals, the length of the third end insulating portion 324 from the uppermost side to the lowermost side minus the lengths of its own multiple intervals, and the length of the fourth end insulating portion 325 from the uppermost side to the lowermost side minus the lengths of its own multiple intervals. Accordingly, the lengths of the above-mentioned intervals correspond to: along the first direction H, the maximum value of the interval length of one of two adjacent end insulating portions or the minimum value of the interval length, along the first direction H, the maximum value of the interval length of two adjacent end insulating portions or the minimum value of the interval length, along the first direction H, the maximum value of the interval length of three adjacent end insulating portions or the minimum value of the interval length, and along the first direction H, the maximum value of the interval length of four adjacent end insulating portions. Of course, the length calculation method of the first end insulating part 314, the second end insulating part 315, the third end insulating part 324, and the fourth end insulating part 325 can also be similar to or the same as the principle of the length calculation method of at least one of the second insulating part, the third insulating part, the fifth insulating part, and the sixth insulating part, and the embodiments of the utility model will not be repeated here.

[0140] In some embodiments, the lengths of the first end insulating portion 314, the second end insulating portion 315, the third end insulating portion 324, and the fourth end insulating portion 325 may also be respectively along the first direction H, the length of the first end insulating portion 314 from the uppermost side to the lowermost side, the length of the second end insulating portion 315 from the uppermost side to the lowermost side, the length of the third end insulating portion 324 from the uppermost side to the lowermost side, and the length of the fourth end insulating portion 325 from the uppermost side to the lowermost side.

[0141] In other embodiments, based on the above-mentioned lengths of the first insulating portion 311, the second insulating portion 312, the third insulating portion 313, the first end insulating portion 314, and the second end insulating portion 315, the length of the first insulating strip 31 may at least include: along the first direction H, the sum of the lengths of multiple first insulating portions 311, the lengths of multiple second insulating portions 312, the lengths of multiple third insulating portions 313, the lengths of the first end insulating portion 314, and the lengths of the second end insulating portion 315, which can be reasonably understood based on actual conditions, such as the above-mentioned situation of being greater than or equal to 55% and less than 100%, the above-mentioned situation of being greater than or equal to 50% and less than or equal to 95%, etc., so that at least the length of the first insulating strip 31 can be clearly determined, thereby facilitating the calculation of the ratio of the length of the first insulating strip 31 to the width of the battery cell body.

[0142] In other embodiments, based on the above-mentioned lengths of the fourth insulating portion 321, the fifth insulating portion 322, the sixth insulating portion 323, the third end insulating portion 324, and the fourth end insulating portion 325, the length of the second insulating strip 32 may also at least include: along the first direction H, the sum of the lengths of multiple fourth insulating portions 321, multiple fifth insulating portions 322, multiple sixth insulating portions 323, the third end insulating portion 324, and the fourth end insulating portion 325, which can be reasonably understood according to actual conditions, such as the above-mentioned situation of being greater than or equal to 55% and less than 100%, the above-mentioned situation of being greater than or equal to 50% and less than or equal to 95%, etc., so that the length of the second insulating strip 32 can be at least clearly determined, thereby facilitating the calculation of the ratio of the length of the second insulating strip 32 to the width of the battery cell body.

[0143] like Fig.10 As shown, an embodiment of the utility model further discloses a photovoltaic assembly, which includes the solar cell sheet described in any one of the above embodiments.

[0144] There are a plurality of solar cells, which are arranged at intervals. Along the first direction H, in two adjacent cells, the first insulating strip 31 of one cell is arranged opposite to the second insulating strip 32 of the other cell.

[0145] The photovoltaic module may also include multiple welding strips 40, which can extend from above the first insulating strip 31 in one battery cell to above the second insulating strip 32 in another battery cell. The multiple welding strips 40 all extend along the first direction H and are arranged at intervals on the battery cell body 10 along the second direction K. Along the second direction K, the insulating strips are distributed on at least both sides of the welding strips 40.

[0146] It should be noted that in the embodiment of the utility model, the solar cell included in the photovoltaic module has the same structure as the solar cell described in the above embodiment, and its beneficial effects are also similar, which will not be described in detail here.

[0147] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0148] Although the optional embodiments of the utility model embodiments have been described, those skilled in the art, once knowing the basic creative concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including optional embodiments and all changes and modifications falling within the scope of the utility model embodiments.

[0149] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity from another entity, and do not necessarily require or imply any such actual relationship or order between these entities. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that an article or terminal 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 article or terminal device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the article or terminal device including the elements.

[0150] The technical solution provided by the present invention is introduced in detail above. Specific examples are used in this article to illustrate the principle and implementation method of the present invention. At the same time, for those skilled in the art, according to the principle and implementation method of the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A solar cell, characterized in that: include: Battery cell body; A plurality of insulating strips, each of which is disposed on the battery cell body, each of which extends along a first direction and is spaced apart along a second direction, wherein the second direction intersects the first direction; Wherein, the insulating strip comprises a plurality of insulating portions arranged at intervals along the first direction; Along the first direction, a ratio of the sum of the lengths of the plurality of insulating portions to the width of the battery cell body is greater than or equal to 55% and less than 100%.

2. The solar cell according to claim 1, characterized in that: The ratio of the sum of the lengths of the plurality of insulating parts to the width of the cell body is greater than or equal to 65% and less than 100%; and / or; the solar cell is a back-contact solar cell; and / or, the plurality of insulating strips include a first insulating strip and a second insulating strip.

3. The solar cell according to claim 2, characterized in that: The first insulating strip comprises a first insulating portion, a second insulating portion and a third insulating portion, wherein the first insulating portion, the second insulating portion and the third insulating portion are arranged at intervals along the first direction; The second insulating part is located between the first insulating part and the third insulating part, or the second insulating part is located between two adjacent third insulating parts, and the third insulating part is located between two adjacent second insulating parts; and / or, the first insulating part, the second insulating part and the third insulating part are each provided with a plurality, and along the first direction, the ratio of the sum of the lengths of the plurality of first insulating parts, the plurality of second insulating parts and the plurality of third insulating parts to the width of the battery cell body is greater than or equal to 50% and less than or equal to 95%.

4. The solar cell according to claim 3, characterized in that: The first insulating part includes a first sub-insulating part, a second sub-insulating part and a third sub-insulating part, wherein: The first sub-insulating portion is in a U-shaped structure; The second sub-insulating portion and the third sub-insulating portion are both in a strip-shaped structure and extend along the second direction; Along the first direction, the middle area of ​​the second sub-insulator is connected to one side of the first sub-insulator, and there is a gap between the two ends of the second sub-insulator and the first sub-insulator. The middle area of ​​the third sub-insulator is connected to the other side of the first sub-insulator, and there is a gap between the two ends of the third sub-insulator and the first sub-insulator.

5. The solar cell according to claim 4, characterized in that: A first connection point is provided on the battery cell body, and the first sub-insulating portion surrounds the first connection point; And / or, the first insulating part further includes a first protrusion and a second protrusion, wherein the first protrusion is connected to a side of the second sub-insulating part away from the first sub-insulating part, and the second protrusion is connected to a side of the third sub-insulating part away from the first sub-insulating part.

6. The solar cell according to claim 3, characterized in that: The second insulating portion includes a fifth sub-insulating portion and a sixth sub-insulating portion, and along the second direction, the fifth sub-insulating portion and the sixth sub-insulating portion are arranged opposite to each other; A plurality of the fifth sub-insulating parts and a plurality of the sixth sub-insulating parts are provided, and the plurality of the fifth sub-insulating parts and the plurality of the sixth sub-insulating parts are arranged at intervals along the first direction.

7. The solar cell according to claim 6, characterized in that: Along the first direction, the interval between two adjacent fifth sub-insulating parts is p1, and the interval between two adjacent sixth sub-insulating parts is p2, which satisfies: 0 mm <p1≤3mm,0mm<p2≤3mm; And / or, the solar cell is further provided with a fourth sub-insulating portion, and the fourth sub-insulating portion is arranged on the cell body, wherein along the second direction, the fifth sub-insulating portion and the sixth sub-insulating portion are located on both sides of the fourth sub-insulating portion; along the first direction, the fifth sub-insulating portion and the sixth sub-insulating portion are staggered with the fourth sub-insulating portion.

8. The solar cell according to claim 6, characterized in that: The solar cell is further provided with a plurality of fourth sub-insulating parts, which are all provided on the cell body and arranged at intervals along the first direction; and / or, along a direction extending from the fifth sub-insulating portion to the sixth sub-insulating portion, a width of the fifth sub-insulating portion gradually increases; And / or, along a direction from the sixth sub-insulating portion to the fifth sub-insulating portion, a width of the sixth sub-insulating portion gradually increases.

9. The solar cell according to claim 7, characterized in that: The fourth sub-insulating portion is in a strip-shaped structure, wherein: Along the first direction, a center line of the fourth sub-insulating portion coincides with a symmetry line between two adjacent fifth sub-insulating portions or between two adjacent sixth sub-insulating portions.

10. The solar cell according to claim 3, characterized in that: The third insulating part includes an eighth sub-insulating part 1 and an eighth sub-insulating part 2, and the eighth sub-insulating part 1 and the eighth sub-insulating part 2 are each provided with a plurality; along the first direction, the plurality of the eighth sub-insulating part 1 and the plurality of the eighth sub-insulating part 2 are arranged at intervals, and along the second direction, the eighth sub-insulating part 1 and the eighth sub-insulating part 2 are arranged opposite to each other.

11. The solar cell according to claim 10, characterized in that: Along the first direction, two adjacent eighth sub-insulating portions 1 are symmetrically distributed, two adjacent eighth sub-insulating portions 2 are symmetrically distributed, the interval between two adjacent eighth sub-insulating portions 1 is t1, and the interval between two adjacent eighth sub-insulating portions 2 is t2, satisfying: 0mm <t1≤2mm,0mm<t2≤2mm; And / or, the eighth sub-insulating portion 1 and the eighth sub-insulating portion 2 are both Z-shaped structures; And / or, the solar cell is further provided with a seventh sub-insulating portion, a plurality of the seventh sub-insulating portions are provided, and all are in a strip-shaped structure, and the plurality of the seventh sub-insulating portions all extend along the first direction and are arranged at intervals along the first direction; Along the second direction, the eighth sub-insulating portion 1 and the eighth sub-insulating portion 2 are both located on both sides of one seventh sub-insulating portion, and the eighth sub-insulating portion 1 and the eighth sub-insulating portion 2 are symmetrically distributed.

12. The solar cell according to claim 2, characterized in that: The second insulating strip comprises a fourth insulating portion, a fifth insulating portion and a sixth insulating portion, wherein the fourth insulating portion, the fifth insulating portion and the sixth insulating portion are arranged at intervals along the first direction; The fifth insulating part is located between the fourth insulating part and the sixth insulating part, or the fifth insulating part is located between two adjacent sixth insulating parts, and the sixth insulating part is located between two adjacent fifth insulating parts; and / or, there are multiple fourth insulating parts, fifth insulating parts and sixth insulating parts. Along the first direction, the ratio of the sum of the lengths of the multiple fourth insulating parts, multiple fifth insulating parts and multiple sixth insulating parts to the width of the battery cell body is greater than or equal to 50% and less than or equal to 95%.

13. The solar cell according to claim 12, characterized in that: The fourth insulating part includes a first sub-insulating part, and the first sub-insulating part has a U-shaped structure. Along the first direction, a plurality of third protrusions are arranged at intervals on the bottom wall of the U-shaped first sub-insulating part. There are two first sub-insulating parts, and they are arranged at intervals along the second direction, and the opening of one first sub-insulating part faces the opening of the other first sub-insulating part.

14. The solar cell according to claim 12, characterized in that: Both the fifth insulating part and the sixth insulating part include multiple groups of second sub-insulating parts arranged at intervals along the first direction. Each group of second sub-insulating parts includes two insulator parts arranged at intervals along the second direction; each insulator part has a strip structure, and the length direction of the strip structure is the second direction.

15. The solar cell according to claim 14, characterized in that: In the fifth insulating part, along the first direction, the interval between two adjacent insulator parts is m1, satisfying: 0mm < m1 ≤ 2mm; and / or, in the sixth insulating part, along the first direction, the interval between two adjacent insulator parts is m2, satisfying: 0mm < m2 ≤ 2mm. and / or, along the second direction, in the fifth insulating part, there is a first gap between the two insulator parts in each group of second sub-insulating parts, and in the sixth insulating part, there is a second gap between the two insulator parts in each group of second sub-insulating parts, where the second gap is greater than the first gap.

16. The solar cell according to claim 2, wherein The battery cell body is provided with a plurality of main grids, and the plurality of main grids all extend along the first direction; the plurality of main grids include a plurality of first main grids and a plurality of second main grids, and the first main grids and the second main grids are arranged at intervals along the second direction. Along the second direction, the first insulating strip is at least distributed on both sides of the first main grid; the second insulating strip is at least distributed on both sides of the second main grid. and / or, the first insulating strip further includes a first end insulating part and a second end insulating part, and the second insulating strip further includes a third end insulating part and a fourth end insulating part; along the first direction, the second end insulating part of the first insulating strip on one battery cell body is arranged opposite to the third end insulating part of the second insulating strip on an adjacent other battery cell body, and the first end insulating part of the first insulating strip on the other battery cell body is arranged opposite to the fourth end insulating part of the second insulating strip on an adjacent one battery cell body.

17. The solar cell according to claim 5, characterized in that: The battery cell body is provided with a plurality of main grids, the main grids extend along the first direction, and the plurality of main grids include a first main grid, wherein, on the plane where the battery cell body is located, the projection of the first convex portion and / or the projection of the second convex portion at least partially overlaps with the projection of the first main grid.

18. The solar cell according to claim 7, characterized in that: The cell body is provided with a plurality of main grids extending along the first direction, and the plurality of main grids include a first main grid, wherein, on the plane where the cell body is located, the projection of the fourth sub-insulating portion at least partially overlaps with the projection of the first main grid.

19. The solar cell according to claim 16, characterized in that: The first main grid is a silver main grid; and / or, the second main grid is an aluminum main grid; and / or, the first end insulating portion includes a plurality of spaced end insulating portions one; and / or, the second end insulating portion includes a plurality of spaced end insulating portions two; and / or, the third end insulating portion includes a plurality of spaced end insulating portions three; and / or, the fourth end insulating portion includes a plurality of spaced end insulating portions four.

20. A photovoltaic module, characterized in that: The invention comprises a plurality of solar cells according to any one of claims 1 to 19.

21. The photovoltaic module according to claim 20, characterized in that: The photovoltaic component further includes a plurality of welding strips, which all extend along the first direction and are arranged at intervals on the battery cell body along the second direction; along the second direction, the insulating strips are distributed at least on both sides of the welding strips.

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