Solar cell and solar cell module

Abstract

The utility model discloses a solar cell and a solar cell module. The solar cell comprises a semiconductor substrate and an electrode structure arranged on the semiconductor substrate. The electrode structure comprises a first fine gate electrode, a first auxiliary electrode, a second fine gate electrode and a second auxiliary electrode. The plurality of first fine gate electrodes and the plurality of second fine gate electrodes are adjacently arranged in a first direction and form a spacer region, the first auxiliary electrodes extend to the spacer region from the first fine gate electrodes, and the second auxiliary electrodes extend to the spacer region from the second fine gate electrodes; and the plurality of first auxiliary electrodes and the plurality of second auxiliary electrodes are alternately arranged into columns at intervals in the interval region along the second direction, so that the structural strength of the electrode structure is enhanced, the stability is improved, the wire breakage phenomenon is avoided, the yield and the quality stability are ensured, and the conductivity and the conversion efficiency are improved.

Description

Technical Field

[0001] This application relates to the field of photovoltaic technology, and in particular to a solar cell and a solar cell module. Background Technology

[0002] Fossil fuels cause air pollution and have limited reserves, while solar energy has advantages such as being clean, pollution-free, and abundant. Therefore, solar energy is gradually becoming a core clean energy source to replace fossil fuels, and due to the excellent photoelectric conversion efficiency of solar cell modules, solar cell modules have become the focus of development in clean energy utilization.

[0003] Conventional solar cells have multiple fine grid lines and multiple main grid lines printed on their surface. The fine grid lines collect the current generated after sunlight exposure, while the main grid lines collect the current from the fine grid lines. Multiple solar cells are connected by solder ribbons to form a solar cell module. However, during the production process of solar cells and solar cell modules, the sintering of the fine grid lines, the sintering of the main grid lines, and the welding of the solder ribbons can easily lead to wire breaks at the intersections of the main grid lines and fine grid lines. This results in a reduction in the power of the solar cell and consequently, an overall power loss in the solar cell module. Summary of the Invention

[0004] Therefore, it is necessary to provide a new solar cell and solar cell module to solve the above-mentioned technical problems.

[0005] One technical solution of this application is: a solar cell, comprising a semiconductor substrate and an electrode structure disposed on the semiconductor substrate, the electrode structure comprising a first fine grid electrode, a first auxiliary electrode, a second fine grid electrode, and a second auxiliary electrode; the first fine grid electrode extends along a first direction, a plurality of the first fine grid electrodes are spaced apart along a second direction, the second fine grid electrode extends along the first direction, a plurality of the second fine grid electrodes are spaced apart along the second direction, the plurality of the first fine grid electrodes and the plurality of the second fine grid electrodes are disposed adjacent to each other in the first direction and form a gap region, the first auxiliary electrode extends from the first fine grid electrode to the gap region, the second auxiliary electrode extends from the second fine grid electrode to the gap region, and the plurality of the first auxiliary electrodes and the plurality of the second auxiliary electrodes are alternately spaced apart in the gap region along the second direction.

[0006] In one embodiment, the first auxiliary electrode includes a first inclined segment extending from the first fine gate electrode, and the second auxiliary electrode includes a second inclined segment extending from the second fine gate electrode. A plurality of the first inclined segments and a plurality of the second inclined segments are arranged alternately in the spacing region along a second direction.

[0007] In one embodiment, the width of the first inclined segment is greater than the width of the first fine gate electrode; the width of the first inclined segment is gradually varied; or, the first auxiliary electrode further includes a first transition segment, the first transition segment connecting the first fine gate electrode and the first inclined segment, the width of the first transition segment being gradually varied; the width of the second inclined segment is greater than the width of the second fine gate electrode; the width of the second inclined segment is gradually varied; or, the second auxiliary electrode further includes a second transition segment, the second transition segment connecting the second fine gate electrode and the second inclined segment, the width of the second transition segment being gradually varied.

[0008] In one embodiment, the first auxiliary electrode includes a first inclined segment extending from the first fine gate electrode and a first connecting segment extending from the first inclined segment, and the second auxiliary electrode includes a second inclined segment extending from the second fine gate electrode and a second connecting segment extending from the second inclined segment, wherein a plurality of the first connecting segments and a plurality of the second connecting segments are arranged alternately at intervals along a second direction in the interval region.

[0009] In one embodiment, the first connecting segment extends along a first direction, the second connecting segment extends along a first direction, and the first connecting segment and the second connecting segment are set at equal intervals, arithmetic intervals, or random intervals in the same column.

[0010] In one embodiment, the width of the first connecting segment is greater than the width of the first fine gate electrode, and the width of the first inclined segment is greater than the width of the first fine gate electrode; the width of the second connecting segment is greater than the width of the second fine gate electrode, and the width of the second inclined segment is greater than the width of the second fine gate electrode.

[0011] In one embodiment, the first inclined segment and the second inclined segment extend in opposite directions or at complementary angles, and are symmetrically arranged adjacent to the first inclined segment and adjacent to the second inclined segment.

[0012] In one embodiment, the width of the first auxiliary electrode is greater than the width of the first fine gate electrode, and the first auxiliary electrode and the first fine gate electrode are arranged in a straight line; the width of the second auxiliary electrode is greater than the width of the second fine gate electrode, and the second auxiliary electrode and the second fine gate electrode are arranged in a straight line; the first fine gate electrode and the second fine gate electrode extend in a staggered direction.

[0013] In one embodiment, the electrode structure further includes a main gate electrode that extends along a second direction and is electrically connected to the first auxiliary electrode and the second auxiliary electrode.

[0014] This utility model also discloses a solar cell module, which includes a plurality of solar cells as described above and a connecting strip electrically connecting the plurality of solar cells.

[0015] The beneficial effects of this application are: a plurality of first auxiliary electrodes and a plurality of second auxiliary electrodes are arranged alternately in the interval region along the second direction to enhance the structural strength of the electrode structure, improve stability, avoid wire breakage, thereby ensuring yield and quality stability, and improving conductivity and conversion efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the solar cell in this application;

[0017] Figure 2 for Figure 1 Enlarged view of center circle A;

[0018] Figure 3 This is a schematic diagram of another structure of the solar cell of this application;

[0019] Figure 4 for Figure 3 Enlarged view of center circle B;

[0020] Figure 5 for Figure 3 An enlarged view of the center circle C;

[0021] Figure 6 This is a schematic diagram of another structure of the solar cell of this application;

[0022] Figure 7 This is an enlarged schematic diagram of circle D in circle 6;

[0023] Figure 8 This is a schematic diagram of another structure of the solar cell of this application;

[0024] Figure 9 for Figure 8 Enlarged view of center circle E;

[0025] Figure 10 for Figure 8 A magnified view of the center circle F. Detailed Implementation

[0026] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described below. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this application.

[0027] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0029] This utility model discloses a solar cell, comprising a semiconductor substrate and an electrode structure disposed on the semiconductor substrate. The electrode structure includes a first fine grid electrode, a first auxiliary electrode, a second fine grid electrode, and a second auxiliary electrode. The first fine grid electrode extends along a first direction, and a plurality of first fine grid electrodes are spaced apart along a second direction. The second fine grid electrodes extend along the first direction, and a plurality of second fine grid electrodes are spaced apart along the second direction. The plurality of first fine grid electrodes and the plurality of second fine grid electrodes are arranged adjacent to each other in the first direction and form a gap region. The first auxiliary electrode extends from the first fine grid electrode to the gap region, and the second auxiliary electrode extends from the second fine grid electrode to the gap region. The plurality of first auxiliary electrodes and the plurality of second auxiliary electrodes are alternately spaced in the gap region along the second direction to enhance the structural strength of the electrode structure, improve stability, avoid wire breakage, thereby ensuring yield and quality stability, and improving conductivity and conversion efficiency. The solar cell can be a PERC cell, Topcon cell, HJT cell, HBC cell, SHJ cell, or IBC cell.

[0030] In one embodiment, the first auxiliary electrode includes a first inclined segment extending from the first fine gate electrode by bending, and the second auxiliary electrode includes a second inclined segment extending from the second fine gate electrode by bending. A plurality of first inclined segments and a plurality of second inclined segments are alternately arranged in a row along a second direction in an interval region, resulting in a reasonable distribution and stable structure. The width of the first inclined segment is greater than the width of the first fine gate electrode; the width of the first inclined segment is gradually varied. Alternatively, the first auxiliary electrode further includes a first transition segment connecting the first fine gate electrode and the first inclined segment, with a gradually varied width. The width of the second inclined segment is greater than the width of the second fine gate electrode; the width of the second inclined segment is gradually varied. Alternatively, the second auxiliary electrode further includes a second transition segment connecting the second fine gate electrode and the second inclined segment, with a gradually varied width. This ensures stable conductivity, avoids wire breakage, and improves conversion efficiency.

[0031] In one embodiment, the first auxiliary electrode includes a first inclined segment extending from the first fine gate electrode and a first connecting segment continuing to extend from the first inclined segment. The second auxiliary electrode includes a second inclined segment extending from the second fine gate electrode and a second connecting segment continuing to extend from the second inclined segment. A plurality of first connecting segments and a plurality of second connecting segments are alternately arranged in a row along a second direction in an interval region, resulting in a reasonable distribution and stable structure. The first connecting segments extend along a first direction, and the second connecting segments extend along the first direction. The first connecting segments and the second connecting segments are spaced at equal, arithmetic, or random intervals within the same column. The width of the first connecting segment is greater than the width of the first fine gate electrode, and the width of the first inclined segment is greater than the width of the first fine gate electrode; the width of the second connecting segment is greater than the width of the second fine gate electrode, and the width of the second inclined segment is greater than the width of the second fine gate electrode. The first auxiliary electrode also includes a first transition segment connecting the first fine gate electrode and the first inclined segment, with a gradually changing width. The second auxiliary electrode also includes a second transition segment connecting the second fine gate electrode and the second inclined segment, with a gradually changing width.

[0032] In one embodiment, the first inclined segment and the second inclined segment extend in opposite directions or at complementary angles, and adjacent first inclined segments are symmetrically arranged, and adjacent second inclined segments are symmetrically arranged.

[0033] In one embodiment, the width of the first auxiliary electrode is greater than the width of the first fine gate electrode, and the first auxiliary electrode and the first fine gate electrode are arranged in a straight line. The width of the second auxiliary electrode is greater than the width of the second fine gate electrode, and the second auxiliary electrode and the second fine gate electrode are arranged in a straight line. The first fine gate electrode and the second fine gate electrode extend in a staggered direction.

[0034] In one embodiment, the electrode structure further includes a main gate electrode that extends along a second direction and is electrically connected to a first auxiliary electrode and a second auxiliary electrode to prevent wire breakage, improve conductivity, and increase conversion efficiency.

[0035] This invention also discloses a solar cell module, which includes a plurality of solar cells as described above and connecting strips electrically connecting the plurality of solar cells. The connecting strips are welded to a first auxiliary electrode and a second auxiliary electrode along a second direction, or welded along the main grid electrode, connecting the solar cells to form a solar cell module, which can prevent wire breakage and improve strength, conductivity and solar energy conversion efficiency.

[0036] Please refer to the following: Figures 1 to 10 The following example describes the solar cell of this utility model.

[0037] Please refer to Figure 1 and Figure 2 This utility model discloses a solar cell 100, which includes a semiconductor substrate 101 and an electrode structure 102 disposed on the semiconductor substrate 101. The electrode structure 102 includes a first fine grid electrode 1, a first auxiliary electrode 2, a second fine grid electrode 3, and a second auxiliary electrode 4. The first fine grid electrode 1 extends along a first direction X, and a plurality of first fine grid electrodes 1 are arranged at intervals along a second direction Y perpendicular to the first direction X. The second fine grid electrodes 3 extend along the first direction X, and a plurality of second fine grid electrodes 3 are arranged at intervals along the second direction Y. The plurality of first fine grid electrodes 1 and the plurality of second fine grid electrodes 3 are arranged adjacent to each other in the first direction X and form an interval region. The first auxiliary electrode 2 extends from the first fine grid electrode 1 to the interval region, and the second auxiliary electrode 4 extends from the second fine grid electrode 3 to the interval region. The plurality of first auxiliary electrodes 2 and the plurality of second auxiliary electrodes 4 are arranged alternately at intervals in the interval region along the second direction Y to enhance the structural strength of the electrode structure 102, improve stability, avoid wire breakage, thereby ensuring yield and quality stability, and improving conductivity and conversion efficiency.

[0038] Specifically, the first auxiliary electrode 2 includes a first inclined segment 21 extending from the first fine gate electrode 1 by bending, and a first connecting segment 22 extending further from the first inclined segment 21. The second auxiliary electrode 4 includes a second inclined segment 41 extending from the second fine gate electrode 3 by bending, and a second connecting segment 42 extending further from the second inclined segment 41. The angle between the first inclined segment 21 and the first fine gate electrode 1 is α, and the angle between the second inclined segment 42 and the second fine gate electrode 3 is α, with the angle α ranging from 5° to 85°. The first connecting segment 22 extends along a first direction X, and the second connecting segment 42 extends along the first direction X. The first connecting segment 22 and the second connecting segment 42 are alternately arranged at equal intervals in the same column along a second direction Y. The width of the first connecting segment 22 is greater than the width of the first fine gate electrode 1, and the width of the first inclined segment 21 is greater than the width of the first fine gate electrode 1. The width of the second connecting segment 42 is greater than the width of the second fine gate electrode 3, and the width of the second inclined segment 41 is greater than the width of the second fine gate electrode 3. In this embodiment, the tilt angle α of the first tilted segment 21 and the second tilted segment 41 is the same. In other embodiments, the tilt angle α of the first tilted segment 21 and the second tilted segment 41 may be different. In this embodiment, adjacent first fine gate electrodes 1 and second fine gate electrodes 3 extend in the same straight line in the first direction X. In other embodiments, adjacent first fine gate electrodes 1 and second fine gate electrodes 3 extend parallel to each other in the first direction X at a staggered angle, or the first fine gate electrode 1 and / or the second fine gate electrode 3 extend at an angle, and it is considered that they can extend along the first direction X within ±45° of the first direction X.

[0039] The first auxiliary electrode 2 also includes a first transition section 23, which connects the first fine gate electrode 1 and the first inclined section 21. The width of the first transition section 23 is gradually varied. The second auxiliary electrode 4 also includes a second transition section 43, which connects the second fine gate electrode 3 and the second inclined section 42. The width of the second transition section 43 is gradually varied.

[0040] The first inclined segment 21 and the second inclined segment 41 extend in opposite directions or at complementary angles. Adjacent first inclined segments 21 are symmetrically arranged, either inward or outward; adjacent second inclined segments 42 are symmetrically arranged, either inward or outward.

[0041] Please refer to Figures 3 to 5This utility model discloses another type of solar cell 200, which includes a semiconductor substrate 201 and an electrode structure 202 disposed on the semiconductor substrate 201. The electrode structure 202 includes a first fine grid electrode 51, a second auxiliary electrode 52, a second fine grid electrode 53, a second auxiliary electrode 54, and a main grid electrode 55. The first fine grid electrode 51, the second auxiliary electrode 52, the second fine grid electrode 53, and the second auxiliary electrode 54 have the same structure and arrangement as the first fine grid electrode 1, the second auxiliary electrode 2, the second fine grid electrode 3, and the second auxiliary electrode 4 of the solar cell 100. A plurality of main grid electrodes 55 are arranged at intervals along a first direction X, and the main grid electrodes 55 extend along a second direction Y and are electrically connected to a row of first auxiliary electrodes 52 and second auxiliary electrodes 54. The first auxiliary electrode 52 includes a first connecting segment 521, and the second auxiliary electrode 54 includes a second connecting segment 541. The main grid electrode 55 is perpendicularly crossed and electrically connected to the first connecting segment 521 and the second connecting segment 541 in the same row along the second direction Y. In the first direction X, the first connecting segment 521 or the second connecting segment 541 protrudes from the main gate electrode 55 by a length greater than or equal to 5 μm. A pad 551 is provided on the main gate electrode 55, and the pad 551 overlaps with at least one of the first connecting segments 521 or the second connecting segment 522.

[0042] Please refer to Figure 6 and Figure 7 This utility model discloses another type of solar cell 300, which includes a semiconductor substrate 301 and an electrode structure 302 disposed on the semiconductor substrate 301. The electrode structure 302 includes a first fine grid electrode 61, a first auxiliary electrode 62, a second fine grid electrode 63, and a second auxiliary electrode 64. The first fine grid electrode 61 extends along a first direction X, and a plurality of first fine grid electrodes 61 are arranged at intervals along a second direction Y perpendicular to the first direction X. The second fine grid electrode 63 extends along the first direction X, and a plurality of second fine grid electrodes 63 are arranged at intervals along the second direction Y. A plurality of first fine gate electrodes 61 and a plurality of second fine gate electrodes 63 are arranged adjacently in the first direction X and form a spaced region. A first auxiliary electrode 62 extends from the first fine gate electrode 61 to the spaced region, and a second auxiliary electrode 64 extends from the second fine gate electrode 63 to the spaced region. The plurality of first auxiliary electrodes 62 and the plurality of second auxiliary electrodes 64 are arranged alternately in the spaced region along the second direction Y to strengthen the structural strength of the electrode structure 302, improve stability, avoid wire breakage, thereby ensuring yield and quality stability, and improving conductivity and conversion efficiency.

[0043] The first auxiliary electrode 62 includes a first inclined segment 621 extending from the first fine gate electrode 61 by bending, and the second auxiliary electrode 64 includes a second inclined segment 641 extending from the second fine gate electrode 62 by bending. The first inclined segment 621 and the second inclined segment 641 are arranged alternately in a spacing region along the second direction Y. The width of the first inclined segment 621 is greater than the width of the first fine gate electrode 61, and the width of the first inclined segment 621 is gradually varied. The width of the second inclined segment 641 is greater than the width of the second fine gate electrode 63, and the width of the second inclined segment 641 is gradually varied. The first inclined segment 621 and the second inclined segment 641 have the same inclination angle, and the angle between the first inclined segment 621 and the first direction X is β, and the angle between the second inclined segment 641 and the first direction X is also β. In other embodiments, the inclination angles of the first inclined segment 621 and the second inclined segment 641 are not the same. The extension directions of the first inclined segment 621 and the second inclined segment 641 are opposite or the extension angles are complementary. The adjacent first inclined segments 621 are symmetrically arranged, with an inward or outward octagonal arrangement; the adjacent second inclined segments 641 are symmetrically arranged, with an inward or outward octagonal arrangement.

[0044] In other embodiments, the first auxiliary electrode 62 further includes a first transition section, which connects the first fine gate electrode 61 and the first inclined section 621. The width of the first inclined section 621 is greater than the width of the first fine gate electrode 61 and is uniformly arranged, while the width of the first transition section is gradually varied. The second auxiliary electrode 63 further includes a second transition section, which connects the second fine gate electrode 63 and the second inclined section 641. The width of the second inclined section 641 is greater than the width of the second fine gate electrode 63 and is uniformly arranged, while the width of the second transition section is gradually varied.

[0045] Please refer to Figures 8 to 10This utility model discloses a printing screen 400, which includes a semiconductor substrate 401 and an electrode structure 402 disposed on the semiconductor substrate 401. The electrode structure 402 includes a first fine gate electrode 71, a second auxiliary electrode 72, a second fine gate electrode 73, a second auxiliary electrode 74, and a main gate electrode 75. The first fine gate electrode 71, the second auxiliary electrode 72, the second fine gate electrode 73, and the second auxiliary electrode 74 have the same structure and arrangement as the first fine gate electrode 61, the second auxiliary electrode 62, the second fine gate electrode 63, and the second auxiliary electrode 64 of the solar cell 300. A plurality of main gate electrodes 75 are arranged at intervals along a first direction X, and the main gate electrodes 75 extend along a second direction Y and are electrically connected to a row of first auxiliary electrodes 72 and second auxiliary electrodes 74. The first auxiliary electrode 72 includes a first inclined segment 721, and the second auxiliary electrode 74 includes a second inclined segment 741. The main gate electrode 75 is electrically connected to the first inclined segment 721 and the second inclined segment 741 in the same row along the second direction Y. The first inclined segment 721 or the second inclined segment 741 protrudes from the main gate electrode 75 by a length greater than or equal to 5 μm. A pad 751 is provided on the main gate electrode 75, and the pad 751 overlaps with at least one of the first inclined segments 721 or the second inclined segment 741.

[0046] To make the above-described objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application have been described in detail above with reference to the accompanying drawings. Many specific details have been set forth in the above description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described above, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed above. Furthermore, the technical features of the embodiments described above can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments have been described; however, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification.

[0047] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A solar cell, characterized in that, It includes a semiconductor substrate and an electrode structure disposed on the semiconductor substrate. The electrode structure includes a first fine gate electrode, a first auxiliary electrode, a second fine gate electrode, and a second auxiliary electrode. The first fine gate electrode extends along a first direction, and a plurality of the first fine gate electrodes are spaced apart along a second direction. The second fine gate electrode extends along the first direction, and a plurality of the second fine gate electrodes are spaced apart along the second direction. The plurality of the first fine gate electrodes and the plurality of the second fine gate electrodes are disposed adjacent to each other in the first direction and form a gap region. The first auxiliary electrode extends from the first fine gate electrode to the gap region, and the second auxiliary electrode extends from the second fine gate electrode to the gap region. The plurality of the first auxiliary electrodes and the plurality of the second auxiliary electrodes are alternately spaced apart in the gap region along the second direction.

2. The solar cell according to claim 1, characterized in that, The first auxiliary electrode includes a first inclined segment extending from the first fine gate electrode by bending, and the second auxiliary electrode includes a second inclined segment extending from the second fine gate electrode by bending. A plurality of the first inclined segments and a plurality of the second inclined segments are arranged alternately in the interval region along a second direction.

3. The solar cell according to claim 2, characterized in that, The width of the first inclined segment is greater than the width of the first fine gate electrode; the width of the first inclined segment is gradually changed; or, the first auxiliary electrode further includes a first transition segment, the first transition segment connecting the first fine gate electrode and the first inclined segment, the width of the first transition segment being gradually changed; the width of the second inclined segment is greater than the width of the second fine gate electrode; the width of the second inclined segment is gradually changed; or, the second auxiliary electrode further includes a second transition segment, the second transition segment connecting the second fine gate electrode and the second inclined segment, the width of the second transition segment being gradually changed.

4. The solar cell according to claim 1, characterized in that, The first auxiliary electrode includes a first inclined segment extending from the first fine gate electrode and a first connecting segment extending from the first inclined segment. The second auxiliary electrode includes a second inclined segment extending from the second fine gate electrode and a second connecting segment extending from the second inclined segment. A plurality of the first connecting segments and a plurality of the second connecting segments are arranged alternately in the interval region along the second direction.

5. The solar cell according to claim 4, characterized in that, The first connecting segment extends along a first direction, and the second connecting segment extends along a first direction. The first connecting segment and the second connecting segment are set with equal spacing, arithmetic spacing, or random spacing in the same column.

6. The solar cell according to claim 4, characterized in that, The width of the first connecting segment is greater than the width of the first fine gate electrode, and the width of the first inclined segment is greater than the width of the first fine gate electrode; the width of the second connecting segment is greater than the width of the second fine gate electrode, and the width of the second inclined segment is greater than the width of the second fine gate electrode.

7. The solar cell according to claim 2 or 4, characterized in that, The first inclined segment and the second inclined segment extend in opposite directions or at complementary angles, and are symmetrically arranged adjacent to the first inclined segment and adjacent to the second inclined segment.

8. The solar cell according to claim 1, characterized in that, The width of the first auxiliary electrode is greater than the width of the first fine gate electrode, and the first auxiliary electrode and the first fine gate electrode are arranged in a straight line; the width of the second auxiliary electrode is greater than the width of the second fine gate electrode, and the second auxiliary electrode and the second fine gate electrode are arranged in a straight line; the first fine gate electrode and the second fine gate electrode extend out of alignment in a first direction.

9. The solar cell according to claim 1, characterized in that, The electrode structure further includes a main gate electrode, which extends along a second direction and is electrically connected to the first auxiliary electrode and the second auxiliary electrode.

10. A solar cell module, characterized in that, It includes a plurality of solar cells as claimed in any one of claims 1 to 9 and a connecting strip electrically connecting the plurality of solar cells.

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