Solar cell panel and manufacturing method therefor, and smart wearable device

Abstract

Provided in the present invention are a solar cell panel and a manufacturing method therefor, and a smart wearable device. A solar cell comprises, arranged on a substrate, a plurality of power generation regions and connection parts, the connection parts being used for enabling mutual electric connection between the plurality of power generation regions, each power generation region comprising a solar cell epitaxial structure and a gate line structure arranged on the surface of the solar cell epitaxial structure, and the gate line structures making contact with the connection parts; furthermore, the solar cell panel is provided with the plurality of power generation regions, all the power generation regions being connected into a ring shape by means of the corresponding connection parts. On this basis, by means of a splicing mode, a ring-shaped solar cell panel can be obtained without the need for hollowing out the interior, which reduces waste of raw materials and improves the material utilization, thus reducing the cost. Additionally, by configuring gate line structures to make contact with connection parts, the connection parts can diversify output voltage / current on the basis of requirements of application environments on the voltage and / or current.

Description

Solar cell panel, manufacturing method thereof and wearable smart device

[0001] The present application claims priority to the Chinese patent application No. CN202410626358.9, filed on May 20, 2024, and entitled "Solar cell panel, manufacturing method thereof and wearable smart device", and to the Chinese patent application No. CN202421100925.9, filed on May 20, 2024, and entitled "Solar cell panel and wearable smart device", the contents of which are incorporated herein by reference in their entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of solar cells, in particular to a solar cell panel, a manufacturing method thereof and a wearable smart device. BACKGROUND

[0003] The wearable smart device has gradually entered the vision of the mass consumers due to its small size, portability and multiple functions, and its market size is further expanding. However, due to its small size, the battery capacity that can be carried is necessarily not too large, which brings the defect of short endurance time, especially in the outdoor environment without sufficient charging, and the power supply at any time becomes a great limiting point of the wearable smart device.

[0004] The solar cell can directly convert solar energy into electric energy, which is the most effective form of clean energy. Applying the solar cell to the outdoor wearable smart device is an excellent power supply measure and can improve the endurance time of the device. At present, a mature solution is the solar cell watch of the outdoor high-end watch manufacturer G-Shock, which has a relatively wide market in the field of outdoor smart devices.

[0005] Therefore, the present application provides a solar cell panel, a manufacturing method thereof and a wearable smart device. SUMMARY

[0006] The present application aims to provide a solar cell panel, a manufacturing method thereof and a wearable smart device to solve the problem of power supply of the wearable smart device.

[0007] In order to achieve the above-mentioned purpose, the technical solution adopted by the present application is as follows:

[0008] A solar cell panel has a solar cell, which includes a plurality of power generation areas and a connecting portion arranged above a substrate, the connecting portion being used to electrically connect the plurality of power generation areas to each other; the power generation area includes a solar cell epitaxial structure and a grid line structure arranged on the surface of the solar cell epitaxial structure, and the grid line structure is in contact with the connecting portion.

[0009] Preferably, the solar cell panel has a plurality of the power generation areas, and all the power generation areas form a ring shape through the connection corresponding to the connection part.

[0010] Preferably, the grid line structure comprises a main grid line connecting the connection part at both ends of the power generation area, and a sub-grid line arranged in cross with the main grid line.

[0011] Preferably, along the direction of the center of the ring shape pointing to the edge of the solar cell panel, the width of the main grid line gradually increases, or the spacing between adjacent two main grid lines gradually decreases.

[0012] Preferably, the grid line structure comprises a transparent electrode or a metal electrode; wherein the transparent electrode comprises one or more of ITO electrode, IZO electrode, IGZO electrode, AZO electrode and graphene electrode; the metal electrode comprises one or more of Ag electrode, Au electrode, Cu electrode and Au / Ag alloy electrode.

[0013] Preferably, the width of the metal electrode is not greater than 15 μm.

[0014] Preferably, the solar cell comprises a flexible multi-junction gallium arsenide solar cell or a flexible single-junction gallium arsenide solar cell, in particular, can comprise a flexible double-junction solar cell or a flexible triple-junction solar cell or a flexible single-junction gallium arsenide solar cell.

[0015] Preferably, the substrate comprises a flexible substrate.

[0016] Preferably, the flexible substrate comprises a polyimide substrate or a Cu substrate.

[0017] Preferably, the connection part comprises a metal connection layer.

[0018] Preferably, the connection part comprises an Ag connection layer and / or a Cu connection layer.

[0019] Preferably, the solar cell panel has 4 power generation areas.

[0020] Preferably, 60 equally divided lines in a first direction are formed on the surface of the solar cell panel, starting from the center point of the junction of adjacent two power generation areas; wherein the first direction is from the center of the ring shape to the edge of the solar cell panel, and the equally divided lines on the surface of the power generation area constitute the sub-grid line.

[0021] Preferably, among all the equally divided lines, the width of the 5th, 10th, 15th, 20th, 25th, 30th, 35th, 40th, 45th, 50th, 55th, 60th equally divided line starting from the center point of the junction of adjacent two power generation areas is relatively thicker than the width of other equally divided lines.

[0022] The application also provides a manufacturing method of a solar cell panel, for manufacturing the solar cell panel according to any one of the above, the manufacturing method comprising the following steps:

[0023] S01, providing a solar cell epitaxial structure laminated on the surface of a growth substrate;

[0024] S02, transferring the solar cell epitaxial structure to a substrate and peeling off the growth substrate to expose the bottom surface of the solar cell epitaxial structure;

[0025] S03, forming a transparent electrode or a metal electrode on the exposed surface of the solar cell epitaxial structure, wherein the transparent electrode or the metal electrode is a grid line structure;

[0026] S04, forming an isolation groove by etching process, the isolation groove extending from the surface of the solar cell epitaxial structure to the surface of the substrate, so that the solar cell epitaxial structure forms a plurality of independent sub-units;

[0027] S05, dividing the sub-units into a plurality of independent power generation areas by laser cutting;

[0028] S06, connecting the power generation areas through the connection of the connection part to form a ring shape.

[0029] Preferably, the grid line structure comprises a main grid line connecting the connection part of the two ends of the power generation area, and a secondary grid line arranged in cross with the main grid line.

[0030] Preferably, the solar cell panel has four power generation areas; the center points of the junctions of adjacent two power generation areas are taken as the starting points to form 60 equal division lines in a first direction on the surface of the solar cell panel; wherein the first direction is directed from the center of the ring to the edge of the solar cell panel, and the equal division lines on the surface of the power generation area constitute the secondary grid line.

[0031] Preferably, among all the equal division lines, the widths of the 5th, 10th, 15th, 20th, 25th, 30th, 35th, 40th, 45th, 50th, 55th and 60th equal division lines from the center points of the junctions of adjacent two power generation areas are relatively thicker than the widths of other equal division lines.

[0032] The application also provides a wearable smart device, comprising a watch face and a control circuit board arranged below the surface, the edge of the watch face is a solar cell panel according to any one of the above, and at least one of the connection parts is connected with the control circuit board.

[0033] Preferably, the equal division lines are used as the second / minute hand indication lines; and among all the equal division lines, the 5th, 10th, 15th, 20th, 25th, 30th, 35th, 40th, 45th, 50th, 55th, 60th equal division lines, whose widths are relatively thicker than those of other equal division lines, are used as the hour hand indication lines.

[0034] Preferably, the equal division lines extend from the side of the solar cell panel close to the dial to the edge of the solar cell panel.

[0035] According to the technical solution described above, the solar cell panel provided by the application comprises a plurality of power generation areas and a connecting portion arranged above a substrate, the connecting portion is used to electrically connect the plurality of power generation areas to each other, each power generation area comprises a solar cell epitaxial structure and a grid line structure arranged on the surface of the solar cell epitaxial structure, the grid line structure is in contact with the connecting portion, and the solar cell panel has a plurality of the power generation areas, and all the power generation areas are connected in a ring shape through the connecting portion. In this way, the ring-shaped solar cell panel can be obtained by splicing, and the interior of the solar cell panel does not need to be hollowed out, so that the waste of raw materials can be reduced, the utilization rate of materials can be improved, and the cost can be reduced. Meanwhile, the grid line structure is in contact with the connecting portion, and based on this, the connecting portion can select series / parallel connection of adjacent two power generation areas according to the requirements of voltage and / or current of the application environment, so that the diversification of output voltage / current can be realized.

[0036] Secondly, the width of the main grid line gradually increases or the distance between adjacent two main grid lines gradually decreases in the direction from the center of the ring to the edge of the solar cell panel. Based on this setting, the current collection effect of the edge of the solar cell panel can be increased, so that the photoelectric conversion efficiency of the solar cell panel can be effectively improved.

[0037] Further, the flexible multi-junction gallium arsenide solar cell with high quality specific power is used, so that the output power of the solar cell panel can be improved and the weight of the solar cell panel can be greatly reduced, which is helpful for the application of the solar cell panel as a power supplement component of a smart device, in particular a portable device.

[0038] The application also provides a manufacturing method of the solar cell panel, which has the above-mentioned beneficial effects, and the manufacturing process is simple and convenient for productization.

[0039] The application also provides a wearable smart device, which comprises a dial and a control circuit board arranged below the dial, the edge of the dial is the solar cell panel according to any one of the above-mentioned embodiments, and at least one connecting portion is connected to the control circuit board. The smart device can realize the power supplement by using the above-mentioned solar cell panel, and also has the beneficial effects of the solar cell.

[0040] Further, by setting the solar cell panel to have 4 power generation areas, and taking the center point of the intersection of two adjacent power generation areas as a starting point, 60 equally divided lines in a first direction are formed on the surface of the solar cell panel, wherein the equally divided lines on the surface of the power generation area constitute the auxiliary grid lines, and the widths of the 5th, 10th, 15th, 20th, 25th, 30th, 35th, 40th, 45th, 50th, 55th, and 60th equally divided lines from the starting point are relatively thicker than the widths of the other equally divided lines. When the solar cell panel is applied to a wearable smart device, the equally divided lines can be used as second / minute hand indication lines, and the widths of the 5th, 10th, 15th, 20th, 25th, 30th, 35th, 40th, 45th, 50th, 55th, and 60th equally divided lines from the starting point are relatively thicker than the widths of the other equally divided lines, which can be used as hour hand indication lines. Thus, the current density of the grid line structure battery is improved to improve the battery efficiency, and the equally divided lines can also be used as hour / minute / second hand indication lines, based on the setting, without the need to additionally manufacture indication lines on the dial, the manufacturing process of the wearable smart device is reduced, and the manufacturing cost is effectively reduced. BRIEF DESCRIPTION OF DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor based on the provided drawings.

[0042] FIG. 1 is a top view of a solar cell panel according to an embodiment of the present application;

[0043] FIG. 2 is a structural schematic diagram of a solar cell according to an embodiment of the present application;

[0044] FIG. 3 and FIG. 4 are structural schematic diagrams corresponding to the manufacturing method of a solar cell panel according to an embodiment of the present application;

[0045] FIG. 5 is a structural schematic diagram of a wearable smart device to which a solar cell panel according to an embodiment of the present application is applied;

[0046] Explanation of symbols in the figures: S0, growth substrate; S1, solar cell epitaxial structure; S2, substrate; S3, sub-grid line; S4, main grid line; S5, power generation area; S6 / S7: connection portion; S8, circuit board; S9, protective layer; S10, first indicator line; S11, second indicator line; 10, dial; 11, InGaAs bottom cell; 12, GaAs middle cell; 13, GaInP top cell; 14, tunnel junction; 15, ohmic contact layer; 16, etching stop layer. DETAILED DESCRIPTION

[0047] In order to make the content of the present application clearer, the content of the present application will be further described below in combination with the drawings. The present application is not limited to this specific embodiment. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present application.

[0048] As shown in FIG. 1 and FIG. 2, a solar cell panel has a solar cell, which includes a plurality of power generation areas S5 and connection portions (S6 / S7) arranged above a substrate, the connection portions (S6 / S7) being used to electrically connect the plurality of power generation areas S5 to each other; the power generation area S5 includes a solar cell epitaxial structure S1 and a grid line structure arranged on the surface of the solar cell epitaxial structure S1, the grid line structure being in contact with the connection portions (S6 / S7).

[0049] Based on the above content, in an embodiment of the present application, the solar cell panel has a plurality of the power generation areas S5, and all the power generation areas S5 form a ring shape through the connection of the corresponding connection portions (S6 / S7). Specifically, the ring shape can include a circular shape, an elliptical shape, a horseshoe shape, etc., which are not limited in the present application.

[0050] Based on the above content, in an embodiment of the present application, the grid line structure includes a main grid line S4 connecting the connection portions (S6 / S7) at both ends of the power generation area S5, and a sub-grid line S3 arranged in cross with the main grid line S4.

[0051] Based on the above content, in an embodiment of the present application, along the direction from the center of the ring shape to the edge of the solar cell panel, the width of the main grid line S4 gradually increases, or the spacing between adjacent two main grid lines S4 gradually decreases.

[0052] Based on the above, in an embodiment of the present application, the gate line structure comprises a transparent electrode or a metal electrode; wherein the transparent electrode comprises one or more of ITO electrode, IZO electrode, IGZO electrode, AZO electrode and graphene electrode; the metal electrode comprises one or more of Ag electrode, Au electrode, Cu electrode and Au / Ag alloy electrode.

[0053] Based on the above, in an embodiment of the present application, in order to realize the aesthetic degree of human eyes and avoid the light shielding of the metal electrode, the width of the metal electrode is not greater than 15 μm.

[0054] Based on the above, in an embodiment of the present application, the solar cell comprises a flexible multi-junction gallium arsenide solar cell or a flexible single-junction gallium arsenide solar cell, and specifically can comprise a flexible double-junction solar cell or a flexible triple-junction solar cell or a flexible single-junction gallium arsenide solar cell.

[0055] Based on the above, in an embodiment of the present application, the substrate comprises a flexible substrate.

[0056] Based on the above, in an embodiment of the present application, the flexible substrate comprises a polyimide substrate or a Cu substrate.

[0057] Based on the above, in an embodiment of the present application, the connecting part (S6 / S7) comprises a metal connecting layer.

[0058] Based on the above, in an embodiment of the present application, the connecting part (S6 / S7) comprises an Ag connecting layer and / or a Cu connecting layer.

[0059] Based on the above, in an embodiment of the present application, the solar panel has 4 power generation areas S5.

[0060] Based on the above, in an embodiment of the present application, 60 equidivisions in a first direction are formed on the surface of the solar panel, with the center point of the intersection of two adjacent power generation areas S5 as the starting point; wherein the first direction is from the ring center to the edge of the solar panel, and the equidivisions on the surface of the power generation area S5 constitute the secondary gate line S3.

[0061] Based on the above, in an embodiment of the present application, in all the equidivisions, the 5th, 10th, 15th, 20th, 25th, 30th, 35th, 40th, 45th, 50th, 55th and 60th equidivisions from the center point of the intersection of two adjacent power generation areas S5 are relatively thicker than the other equidivisions.

[0062] The application further provides a manufacturing method of a solar cell panel, used for manufacturing the solar cell panel described in any one of the above aspects, and comprising the following steps:

[0063] S01, providing a solar cell epitaxial structure S1 laminated on a surface of a growth substrate S0;

[0064] Specifically, the solar cell epitaxial structure S1 can include a flexible multi-junction gallium arsenide solar cell or a flexible single-junction gallium arsenide solar cell, such as a flexible double-junction solar cell or a flexible triple-junction solar cell or a flexible single-junction gallium arsenide solar cell, etc. Based on this, in an embodiment of the application, in order to obtain the flexible cell, the growth substrate S0 is a GaAs substrate.

[0065] Based on the above, in a preferred embodiment of the application, in order to obtain a flexible triple-junction solar cell, as shown in FIG. 3, the solar cell epitaxial structure S1 includes, in sequence, an etching stop layer 16, an ohmic contact layer 15, a GaInP top cell 13, a tunnel junction 14, a GaAs middle cell 12, a tunnel junction 14, an InGaAs bottom cell 11 and an ohmic contact layer 15 laminated on the surface of the GaAs substrate S0; the application does not make any limitation in this regard.

[0066] S02, transferring the solar cell epitaxial structure S1 to a substrate S2 and peeling off the growth substrate S0, so that the bottom surface (i.e. the ohmic contact layer 15 close to the GaInP top cell 13) of the solar cell epitaxial structure S1 is exposed; thereby obtaining a structure as shown in FIG. 4.

[0067] Based on the above, in an embodiment of the application, the substrate S2 includes a flexible substrate.

[0068] Specifically, the flexible substrate can be a polyimide substrate or Cu, and the thickness of the polyimide substrate or Cu is 20-50 μm.

[0069] Based on the above, in an embodiment of the application, the transfer of the solar cell epitaxial structure S1 is realized by a bonding or electroplating process.

[0070] S03, forming a transparent electrode or a metal electrode on the exposed surface of the solar cell epitaxial structure S1, wherein the transparent electrode or the metal electrode is in a grid line structure;

[0071] The transparent electrode includes one or more of an ITO electrode, an IZO electrode, an IGZO electrode, an AZO electrode and a graphene electrode; and the metal electrode includes one or more of an Ag electrode, an Au electrode, a Cu electrode and an Au / Ag alloy electrode.

[0072] Further, in order to realize the aesthetic appearance of human eyes and avoid the light shielding of the metal electrode, the width of the metal electrode is not greater than 15 μm.

[0073] S04, forming an isolation groove by an etching process, the isolation groove extending from the surface of the solar cell epitaxial structure S1 to the surface of the substrate S2, so that the solar cell epitaxial structure S1 forms a plurality of independent sub-units;

[0074] Specifically, the isolation groove is made by ICP dry etching or solution wet etching or dry-wet etching process.

[0075] S05, the sub-units are divided into a plurality of independent power generation areas S5 by laser cutting;

[0076] S06, as shown in FIG. 1, the power generation areas S5 are connected to form a ring through the connection of the connecting parts (S6 / S7).

[0077] Based on the above, in an embodiment of the present application, the grid line structure includes a main grid line S4 connecting the connecting parts (S6 / S7) at both ends of the power generation area S5, and a sub-grid line S3 arranged in cross with the main grid line S4.

[0078] Specifically, the line width of the main grid line S4 is 4-15 μm, and the grid line spacing is 120-140 μm. The line width of the sub-grid line S3 is 8-12 μm.

[0079] Based on the above, in an embodiment of the present application, along the direction of the center of the ring pointing to the edge of the solar cell panel, the width of the main grid line gradually increases, or the spacing of adjacent two main grid lines gradually decreases.

[0080] Based on the above, in an embodiment of the present application, the solar cell panel has 4 power generation areas S5; taking the intersection center point of adjacent two power generation areas S5 as the starting point, 60 equal division lines in a first direction are formed on the surface of the solar cell panel; wherein the first direction is from the center of the ring to the edge of the solar cell panel, and the equal division lines on the surface of the power generation area S5 constitute the sub-grid line S3.

[0081] Based on the above, in an embodiment of the present application, among all the equal division lines, the widths of the 5th, 10th, 15th, 20th, 25th, 30th, 35th, 40th, 45th, 50th, 55th, and 60th equal division lines from the intersection center point of adjacent two power generation areas S5 are relatively thicker than the widths of other equal division lines.

[0082] The application also provides a wearable smart device, comprising a watch face and a control circuit board S8 arranged below the surface, the edge of the watch face is the solar cell panel according to any one of the above, and at least one of the connecting parts (S6 / S7) is connected with the control circuit board S8.

[0083] It should be noted that, in order to make full use of the space of the wearable smart device and reduce its volume, in an embodiment of the application, the shape of the solar cell panel matches the watch face, that is, when the watch face is circular, elliptical, horseshoe-shaped or square, the solar cell panel is correspondingly circular ring, elliptical ring, horseshoe-shaped ring or square ring.

[0084] Among them, the bisector S13 above the connecting part (S6 / S7) can be realized by additional processing technology, and the bisector on the surface of the power generation area S5 is directly composed of the auxiliary grid line S3.

[0085] As an embodiment of the application, as shown in Figure 5, the watch face is circular, and the solar cell panel is correspondingly circular ring, and the solar cell panel has four power generation areas S5 in the form of circular arc. Assuming that the circumference of the circular ring is L, the bisector falls on the circular arc position of every L / 60, and the width of the bisector at the circular arc position of every L / 12 is relatively thick.

[0086] Based on the above, in an embodiment of the application, the bisector is used as the second hand / minute hand indication line (first indication line S10); and among all the bisectors, the width of the 5th, 10th, 15th, 20th, 25th, 30th, 35th, 40th, 45th, 50th, 55th and 60th bisectors from the center point of the junction of adjacent two power generation areas S5 as the starting point is relatively thick compared with the width of other bisectors, which is used as the hour hand indication line (second indication line S11). In addition, the surface of each connecting part (S6 / S7) is covered with a protective layer S9 consistent in color with the power generation area S5.

[0087] Based on the above, in an embodiment of the application, the bisector extends from the side of the solar cell panel close to the watch face to the edge of the solar cell panel.

[0088] Via the technical scheme, the solar cell panel provided by the application has the solar cell comprising a plurality of power generation areas S5 and connecting parts (S6 / S7) arranged above a substrate, the connecting parts (S6 / S7) are used to electrically connect the plurality of power generation areas S5 to each other, the power generation area S5 comprises a solar cell epitaxial structure S1 and a grid line structure arranged on the surface of the solar cell epitaxial structure S1, the grid line structure is in contact with the connecting part (S6 / S7), further, the solar cell panel has a plurality of the power generation areas S5, and all the power generation areas S5 form a ring through the connection of the connecting parts (S6 / S7). Based on this, the ring-shaped solar cell panel can be obtained by splicing, without hollowing out the inside, which can reduce the waste of raw materials, improve the utilization rate of materials, and thus reduce the cost. At the same time, by arranging the grid line structure in contact with the connecting part (S6 / S7), based on this, the connecting part (S6 / S7) can select series / parallel connection of adjacent two power generation areas S5 according to the requirements of voltage and / or current of the application environment, to realize the diversification of output voltage / current.

[0089] Secondly, in the direction of the center of the ring pointing to the edge of the solar cell panel, the width of the main grid line gradually increases, or the spacing between adjacent two main grid lines gradually decreases. Based on this setting, the current collection effect of the edge of the solar cell panel can be increased, thereby effectively improving the photoelectric conversion efficiency of the solar cell panel.

[0090] Further, the flexible multi-junction gallium arsenide solar cell with high quality specific power is used, thereby greatly reducing the weight of the solar cell panel on the basis of improving the output power of the solar cell panel, which is helpful for the application of the solar cell panel as a power supplement component of a smart device, in particular a portable device.

[0091] The application further provides a manufacturing method of a solar cell panel, which has the above-mentioned beneficial effects, and the manufacturing process is simple and beneficial to productization.

[0092] The application further provides a wearable smart device comprising a watch face and a control circuit board S8 arranged below the surface, the edge of the watch face is the solar cell panel according to any one of the above-mentioned embodiments, and at least one connecting part (S6 / S7) is connected with the control circuit board S8. The device can realize the power supplement by the above-mentioned solar cell panel, and also realize the beneficial effects of the solar cell.

[0093] Further, by setting the solar cell panel to have 4 power generation areas S5, 60 equidivisions in a first direction are formed on the surface of the solar cell panel, with the center point of the intersection of two adjacent power generation areas S5 as the starting point, wherein the equidivisions on the surface of the power generation area S5 constitute the secondary grid lines S3; and in all the equidivisions, the 5th, 10th, 15th, 20th, 25th, 30th, 35th, 40th, 45th, 50th, 55th, and 60th equidivisions from the center point of the intersection of two adjacent power generation areas S5 as the starting point are relatively thicker than the other equidivisions. When the solar cell panel is applied to a wearable smart device, the equidivisions can be used as the second / minute hand indication lines; and in all the equidivisions, the 5th, 10th, 15th, 20th, 25th, 30th, 35th, 40th, 45th, 50th, 55th, and 60th equidivisions from the center point of the intersection of two adjacent power generation areas S5 as the starting point are relatively thicker than the other equidivisions, which can be used as the hour hand indication lines. Thus, the current density of the grid line structure battery is improved to improve the battery efficiency, and the equidivisions can also be used as the hour / minute / second hand indication lines, based on the setting, without the need to additionally make indication lines on the dial, reducing the manufacturing process of the wearable smart device, and effectively reducing the manufacturing cost. Each of the embodiments in the specification is described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between the embodiments can be mutually referred to.

[0094] It is also necessary to point out that in this document, the relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such article or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another identical element in the article or device including the above element.

[0095] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to the embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A solar panel provided with solar cells, characterized in that, The solar cell includes a plurality of power generation regions and a connecting portion arranged above a substrate, the connecting portion being used to electrically connect the plurality of power generation regions to each other; the power generation region includes a solar cell epitaxial structure and a grid line structure arranged on the surface of the solar cell epitaxial structure, the grid line structure being in contact with the connecting portion.

2. The solar panel of claim 1, wherein, The solar cell panel has a plurality of the power generation regions, and all the power generation regions are connected in a ring shape through the connecting portions.

3. The solar panel of claim 2, wherein, The grid line structure includes main grid lines connected to the connecting portions at both ends of the power generation region, and sub-grid lines arranged in a cross shape with the main grid lines.

4. The solar panel of claim 3, wherein, In a direction from the center of the ring shape to the edge of the solar cell panel, the width of the main grid lines gradually increases, or the distance between adjacent two main grid lines gradually decreases.

5. The solar panel of claim 3, wherein, The grid line structure includes a transparent electrode or a metal electrode; wherein the transparent electrode includes one or more of an ITO electrode, an IZO electrode, an IGZO electrode, an AZO electrode, and a graphene electrode; and the metal electrode includes one or more of an Ag electrode, an Au electrode, a Cu electrode, and an Au / Ag alloy electrode.

6. The solar panel of claim 5, wherein, The width of the metal electrode is not greater than 15 μm.

7. The solar panel of claim 1, wherein, The solar cell includes a flexible multi-junction gallium arsenide solar cell or a flexible single-junction gallium arsenide solar cell.

8. The solar panel of claim 7, wherein, The substrate includes a flexible substrate.

9. The solar panel of claim 8, wherein, The flexible substrate includes a polyimide substrate or a Cu substrate.

10. The solar panel of claim 1, wherein, The connecting portion includes a metal connecting layer.

11. The solar panel of claim 1, wherein, The connecting portion includes an Ag connecting layer and / or a Cu connecting layer.

12. The solar panel of claim 3, wherein, The solar cell panel has 4 power generation regions.

13. The solar panel of claim 12, wherein, Starting from the center points of the junctions of adjacent two power generation regions, 60 equally divided lines in a first direction are formed on the surface of the solar cell panel; wherein the first direction is from the center of the ring shape to the edge of the solar cell panel, and the equally divided lines on the surface of the power generation region constitute the sub-grid lines.

14. The solar panel of claim 13, wherein, Among all the equally divided lines, the widths of the 5th, 10th, 15th, 20th, 25th, 30th, 35th, 40th, 45th, 50th, 55th, and 60th equally divided lines from the center points of the junctions of adjacent two power generation regions are relatively thicker than the widths of other equally divided lines.

15. A method for manufacturing a solar panel according to any one of claims 1-10, c h a r a c t e r i s e d i n that The manufacturing method includes the following steps: S01, providing a solar cell epitaxial structure stacked on the surface of a growth substrate; S02, transferring the solar cell epitaxial structure to a substrate and peeling off the growth substrate to expose the bottom surface of the solar cell epitaxial structure; S03, forming a transparent electrode or a metal electrode on the exposed surface of the solar cell epitaxial structure, wherein the transparent electrode or the metal electrode is a grid line structure; S04, forming an isolation groove through an etching process, the isolation groove extending from the surface of the solar cell epitaxial structure to the surface of the substrate, so that the solar cell epitaxial structure forms a plurality of independent sub-units; S05, dividing the sub-units into a plurality of independent power generation regions through laser cutting; S06, connecting the power generation regions in a ring shape through the connecting portions.

16. The method of claim 15, wherein, The grid line structure includes main grid lines connected to the connecting portions at both ends of the power generation region, and sub-grid lines arranged in a cross shape with the main grid lines.

17. The method for manufacturing a solar panel according to claim 16, characterized in that, The solar panel has 4 power generation areas; with the center point of the junction of two adjacent power generation areas as the starting point, 60 equal division lines in the first direction are formed on the surface of the solar panel; wherein the first direction is from the center of the ring to the edge of the solar panel, and the equal division lines on the surface of the power generation area constitute the auxiliary grid lines.

18. The method of claim 17, wherein, In all the equal division lines, the width of the 5th, 10th, 15th, 20th, 25th, 30th, 35th, 40th, 45th, 50th, 55th, and 60th equal division lines from the center point of the junction of two adjacent power generation areas is relatively thicker than the width of other equal division lines.

19. A wearable smart device comprising a watch face and a control circuit board disposed beneath the surface, wherein, The dial edge is the solar panel according to any one of claims 1-14, and at least one of the connection parts is connected with the control circuit board.

20. The smart wearable device of claim 19, wherein, The equal division lines are used as the second / minute hand indication lines; and in all the equal division lines, the width of the 5th, 10th, 15th, 20th, 25th, 30th, 35th, 40th, 45th, 50th, 55th, and 60th equal division lines from the center point of the junction of two adjacent power generation areas is relatively thicker than the width of other equal division lines, which are used as the hour hand indication lines.

21. The smart wearable device of claim 19, wherein, The equal division lines extend from the side of the solar panel close to the dial to the edge of the solar panel.

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