Solar cell module, photovoltaic module and preparation method thereof

Abstract

The invention provides a solar cell module, a photovoltaic module and a preparation method thereof. The solar cell module comprises a cell connecting piece and a plurality of solar cell pieces, the cell connecting piece comprises a bearing substrate and a metal conducting layer arranged on the bearing substrate in a stacked mode, and every two adjacent solar cell pieces are electrically connected through the metal conducting layer in the cell connecting piece. The metal conductive layer is arranged between the solar cell and the bearing substrate.

Description

Technical Field

[0001] The present invention relates to the field of photovoltaic technology, and particularly to a solar cell module, a photovoltaic module and a preparation method thereof. Background Art

[0002] A solar cell is a semiconductor device that can receive solar energy and generate electric energy, and has been widely used at present.

[0003] In actual production and application, it is usually necessary to connect and encapsulate multiple solar cells to form a photovoltaic module. In traditional technology, a plurality of solar cells are usually connected into a whole battery module by using a solder ribbon. Currently, the commonly used solder ribbon materials are tin-coated copper strips or tin-coated copper wires. The solder ribbon material can be welded to the grid electrode of the solar cell through the tin metal layer on the surface, so that adjacent solar cells are conducted. Since the material of the solder ribbon is different from that of the solar cell, stress accumulation and stress fatigue are likely to occur under long-term high and low temperature changes, and finally the bonding between the solder ribbon and the solar cell is weakened or even disconnected, resulting in a relatively high failure or safety risk for the solar cell module. Summary of the Invention

[0004] Based on this, in view of the problems in the above background art, it is necessary to provide a solar cell module to ensure the bonding stability of the solar cell module and reduce the failure or safety risk of the solar cell module.

[0005] According to some embodiments of the present disclosure, there is provided a solar cell module, which includes a battery connector and a plurality of solar cells. The battery connector includes a carrier substrate and a metal conductive layer stacked on the carrier substrate. Two adjacent solar cells are electrically connected through the metal conductive layer in the battery connector, and the metal conductive layer is disposed between the solar cell and the carrier substrate.

[0006] In some embodiments of the present disclosure, the difference in the coefficient of thermal expansion between the carrier substrate and the solar cell is less than the difference in the coefficient of thermal expansion between the metal conductive layer and the solar cell.

[0007] In some embodiments of the present disclosure, the hardness of the carrier substrate is greater than the hardness of the metal conductive layer.

[0008] In some embodiments of the present disclosure, the material of the carrier substrate includes one or more of silicon, silicon nitride, silicon carbide, gallium arsenide, conductive metal oxide, quartz, glass, ceramic, and sapphire.

[0009] In some embodiments of the present disclosure, the material of the metal conductive layer includes one or more of silver, copper, aluminum, tin, and lead.

[0010] In some embodiments of the present disclosure, the carrier substrate includes silicon, and the mass content of silicon in the carrier substrate is more than 70%.

[0011] In some embodiments of the present disclosure, the thickness of the carrier substrate is greater than the thickness of the metal conductive layer.

[0012] In some embodiments of the present disclosure, the thickness of the carrier substrate is 50 μm to 300 μm.

[0013] In some embodiments of the present disclosure, the thickness of the metal conductive layer is 1 μm to 50 μm.

[0014] In some embodiments of the present disclosure, the battery connection member further includes a spacer layer disposed between the carrier substrate and the metal conductive layer.

[0015] In some embodiments of the present disclosure, the carrier substrate is a semiconductor, and the battery connection member further includes a conductive enhancement layer disposed on a side of the carrier substrate away from the metal conductive layer.

[0016] In some embodiments of the present disclosure, the solar cell includes a cell substrate and electrodes disposed on the cell substrate, and the solar cell module further includes an adhesive layer disposed between the cell substrate and the carrier substrate, and the adhesive layer is disposed on a side edge of the electrodes, and the carrier substrate is adhered to the cell substrate through the adhesive layer.

[0017] In some embodiments of the present disclosure, the material of the adhesive layer is selected from heat shrinkable materials.

[0018] In some embodiments of the present disclosure, the metal conductive layer is welded to the electrodes in the solar cell; or,

[0019] The solar cell module further includes a conductive adhesion layer disposed between the metal conductive layer and the electrodes in the solar cell, and the metal conductive layer is electrically connected to the electrodes through the conductive adhesion layer.

[0020] In some embodiments of the present disclosure, the solar cell includes a cell substrate and a plurality of electrodes disposed on the back surface of the cell substrate, and the plurality of electrodes include a first electrode and a second electrode with opposite polarities. In two adjacent solar cells, the first electrode on one of the solar cells and the second electrode on the other solar cell form an electrode group, and the first electrode and the second electrode in the electrode group are electrically connected through the battery connection member.

[0021] In some embodiments of the present disclosure, the metal conductive layer includes a linear conductive portion, and the linear conductive portion is connected to one of the electrode groups.

[0022] In some embodiments of the present disclosure, a plurality of the solar cell wafers are arranged in parallel along the extending direction of the electrode, and the extending direction of the linear conductive portion is the same as the extending direction of the electrode.

[0023] In some embodiments of the present disclosure, the linear conductive portion covers a part of the first electrode and a part of the second electrode. The cell connector further includes a first connection segment and a second connection segment located on the carrier substrate, and the first connection segment and the second connection segment are arranged at intervals; the solar cell module includes more than three cell connectors. Among the three consecutive cell connectors, the two ends of the linear conductive portion in the middle cell connector respectively contact the first connection segment in the front-side cell connector and the second connection segment in the rear-side cell connector.

[0024] In some embodiments of the present disclosure, the solar cell wafer further includes an electrode contact pad, and the electrode contact pad is disposed on the electrode and connected to the electrode; the metal conductive layer includes the linear conductive portion, and the cell connector further includes a conductive connection pad corresponding to the electrode contact pad. The conductive connection pad is disposed on the linear conductive portion and connected to the linear conductive portion, and the conductive connection pad contacts the corresponding electrode contact pad.

[0025] In some embodiments of the present disclosure, a plurality of the electrodes are main grid electrodes, and the solar cell wafer further includes fine grid electrodes connected to the main grid electrodes; the metal conductive layer includes the linear conductive portion, and the cell connector further includes conductive branch lines corresponding to the fine grid electrodes. The conductive branch lines are connected to the linear conductive portion, and the conductive branch lines contact the fine grid electrodes.

[0026] In some embodiments of the present disclosure, a plurality of electrode groups are included in two adjacent solar cell wafers, and the metal conductive layer includes a sheet-shaped conductive portion, and the sheet-shaped conductive portion is connected to the plurality of electrode groups.

[0027] In some embodiments of the present disclosure, a plurality of the solar cell wafers are arranged in parallel in a direction intersecting the extending direction of the electrode, and the extending direction of the sheet-shaped conductive portion intersects the extending direction of the electrode;

[0028] The solar cell module further includes a first spacer protruding from the surface of the first electrode and a second spacer protruding from the surface of the second electrode. The sheet-shaped conductive portion is spaced apart from the first electrode and the second electrode. In two adjacent solar cells, the sheet-shaped conductive portion is connected to the first spacer located on one of the solar cells and the second spacer located on the other solar cell.

[0029] In some embodiments of the present disclosure, the battery substrate has a first connection region and a second connection region that are spaced apart. One end of the first electrode is located in the first connection region, and the first electrode is spaced apart from the second connection region. One end of the second electrode is located in the second connection region, and the second electrode is spaced apart from the first connection region.

[0030] The sheet-shaped conductive portion straddles adjacent solar cells. The sheet-shaped conductive portion is disposed on the first connection region in the first solar cell and is connected to the first electrode located therein. The sheet-shaped conductive portion is also disposed on the second connection region in the second solar cell and is connected to the second electrode located therein.

[0031] In some embodiments of the present disclosure, the battery connector further includes a PN junction. Two ends of the PN junction are respectively connected to the positive electrode and the negative electrode in a solar cell, and the P end of the PN junction is electrically connected to the negative electrode, and the N end of the PN junction is electrically connected to the positive electrode.

[0032] In some embodiments of the present disclosure, one end of the PN junction is electrically connected to the metal conductive layer, and the PN junction is electrically connected to the electrode of the solar cell through the metal conductive layer.

[0033] In some embodiments of the present disclosure, the battery connector further includes an auxiliary electrode. The PN junction is electrically connected to the electrode in the solar cell through the auxiliary electrode.

[0034] In some embodiments of the present disclosure, the carrier substrate is a semiconductor, the PN junction is disposed in the carrier substrate, and the PN junction is formed by doping based on the carrier substrate.

[0035] Furthermore, the present disclosure also provides a photovoltaic module, which includes a first support plate, a second support plate, and the solar cell module as described in any of the above embodiments. The solar cell module is disposed between the first support plate and the second support plate.

[0036] Furthermore, the present disclosure also provides a method for manufacturing a photovoltaic module as described in any of the above embodiments, which includes the following steps:

[0037] Align and connect the battery connector to the plurality of solar cells to form the solar cell module; and,

[0038] Dispose the first support plate and the second support plate on both sides of the solar cell module respectively.

[0039] In some embodiments of the present disclosure, the step of aligning and connecting the battery connector to the plurality of solar cells includes:

[0040] Attach the carrier substrate in the battery connector to the first attachment layer, and align and connect the solar cell to the metal conductive layer; or,

[0041] Attach the solar cell to the second attachment layer, and align and connect the battery connector to the electrodes in the solar cell.

[0042] In the solar cell module provided by the present disclosure, the metal conductive layer is disposed on the carrier substrate, the metal conductive layer is fixed by the carrier substrate, and the metal conductive layer is disposed between the carrier substrate and the solar cell module and is electrically connected to adjacent solar cells through the metal conductive layer. Since the metal conductive layer is fixed by the carrier substrate and the solar cell module, the problem of instantaneous deformation can be improved as much as possible during the connection process, and the long-term bonding stability between the metal conductive layer and the solar cell can be better ensured, thereby improving the stability and safety of the solar cell module.

[0043] The above description is only an overview of the technical solution of the present invention. In order to be able to understand the technical means of the present invention more clearly and implement it according to the content of the specification, the following will describe the preferred embodiments of the present invention in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present disclosure. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to these drawings.

[0045] Figure 1 It is a schematic structural diagram of a solar cell module provided by the present disclosure;

[0046] Figure 2 is Figure 1 a schematic cross-sectional structure diagram of the battery connector in

[0047] Figure 3 is a schematic cross-sectional structure diagram of a solar cell module as shown in Figure 1 ;

[0048] Figure 4 is a schematic cross-sectional structure diagram of one type in a solar cell module as Figure 1 shown;

[0049] Figure 5 is a schematic cross-sectional structure diagram of one type in a solar cell module as Figure 1 shown;

[0050] Figure 6 is a schematic top view structure diagram of a battery connector;

[0051] Figure 7 is a schematic top view structure diagram of a battery connector;

[0052] Figure 8 is a schematic top view structure diagram of a battery connector;

[0053] Figure 9 is a schematic top view structure diagram of a battery connector;

[0054] Figure 10 is a schematic top view structure diagram of a battery connector;

[0055] Figure 11 is a schematic top view structure diagram of a battery connector;

[0056] Figure 12 is a schematic surface structure diagram of a solar cell;

[0057] Figure 13 is a schematic structure diagram of a solar cell module including a solar cell as Figure 12 shown and Figure 6 a battery connector as shown;

[0058] Figure 14 is a schematic structure diagram of a solar cell module including a solar cell as Figure 12 shown and Figure 7 a battery connector as shown;

[0059] Figure 15 is a schematic structure diagram of a solar cell module including a solar cell as Figure 12 shown and Figure 8 a battery connector as shown;

[0060] Figure 16 is a schematic structure diagram of a solar cell module including a solar cell as Figure 12 shown and Figure 11 a battery connector as shown;

[0061] Figure 17 is a schematic surface structure diagram of a solar cell;

[0062] Figure 18 It is a schematic structural diagram of a solar cell module including a solar cell chip as shown in Figure 17 and a battery connector as shown in Figure 10 ;

[0063] Figure 19 It is a schematic surface structure diagram of a solar cell chip;

[0064] Figure 20 It is a schematic structural diagram of a solar cell module including Figure 19 the solar cell chip as shown in Figure 6 and a battery connector as shown in

[0065] Figure 21 It is a schematic structural diagram of a solar cell module including a solar cell chip as shown in Figure 19 and a battery connector as shown in Figure 11 ;

[0066] Figure 22 It is a schematic surface structure diagram of a solar cell chip;

[0067] Figure 23 It is a schematic structural diagram of a solar cell module including a solar cell chip as shown in Figure 22 and a battery connector as shown in Figure 9 ;

[0068] Figure 24 It is a schematic structural diagram of a battery connector provided by the present disclosure;

[0069] Figure 25 It is a schematic structural diagram of a solar cell module including a battery connector including Figure 24 and a solar cell chip as shown in Figure 12 ;

[0070] Figure 26 It is a schematic structural diagram of a battery connector provided by the present disclosure;

[0071] Figure 27 It is a schematic structural diagram of a solar cell module including a solar cell chip as shown in Figure 12 and a battery connector as shown in Figure 26 ;

[0072] Figure 28 It is a schematic structural diagram of a battery connector provided by the present disclosure;

[0073] Figure 29 It is a schematic structural diagram of a solar cell module including a battery connector including Figure 28 and a solar cell chip as shown in Figure 19 ;

[0074] Figure 30 It is a schematic cross-sectional structure diagram of a photovoltaic module;

[0075] Among them, the meanings of each reference numeral are as follows:

[0076] 10. Solar cell; 11. First cell; 12. Second cell; 110. Cell substrate; 111. First connection area; 112. Second connection area; 1111. First positive electrode connection area; 1121. First negative electrode connection area; 1112. Second positive electrode connection area; 1122. Second negative electrode connection area; 120. Electrode; 121. First electrode; 122. Second electrode; 1211. First positive electrode; 1221. First negative electrode; 1212. Second positive electrode; 1222. Second negative electrode; 131. First fine grid electrode; 132. Second fine grid electrode; 141. First contact pad; 142. Second contact pad; 20. Cell connector; 21. Intermediate connector; 22. Front-side connector; 23. Rear-side connector; 210. Carrying substrate; 220. Metal conductive layer; 230. Spacer layer; 240. Conductive enhancement layer; 221. Linear conductive part; 2211. Intermediate conductive part; 2212. Front-side conductive part; 2213. Rear-side conductive part; 222. Sheet-like conductive part; 251. First connection segment; 252. Second connection segment; 2511. Intermediate first connection segment; 2521. Intermediate second connection segment; 2522. Front-side second connection segment; 2513. Rear-side first connection segment; 260. Conductive connection pad; 270. Conductive branch line; 280. PN junction; 290. Auxiliary electrode; 310. Conductive adhesion layer; 320. Adhesive layer; 3311. First positive electrode spacer; 3321. First negative electrode spacer; 3312. Second positive electrode spacer; 3322. Second negative electrode spacer; 410. First support plate; 420. Second support plate; 430. First attachment layer; 440. Second attachment layer; 450. Frame. Detailed implementation manners

[0077] To facilitate the understanding of the present disclosure, the present disclosure will be described more comprehensively below with reference to the relevant drawings. Preferred embodiments of the present disclosure are shown in the drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present disclosure more thorough and comprehensive.

[0078] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present disclosure belongs. The terms used in the description of the present disclosure herein are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0079] It should be understood that when an element or layer is referred to as "on", "adjacent to", "connected to" or "coupled to" another element or layer, it can be directly on, adjacent to, connected or coupled to the other element or layer, or there may be intervening elements or layers. In contrast, when an element is referred to as "directly on", "directly adjacent to", "directly connected to" or "directly coupled to" another element or layer, there are no intervening elements or layers. It should be understood that although the terms first, second, third, etc. may be used to describe various elements, components, regions, layers and / or portions, these elements, components, regions, layers and / or portions should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or portion from another element, component, region, layer or portion. Thus, without departing from the teachings of the present disclosure, the first element, component, region, layer or portion discussed below may be referred to as the second element, component, region, layer or portion.

[0080] Spatial relationship terms such as "under", "below", "lower", "beneath", "above", "upper", etc. are used herein for convenience in describing the relationship of one element or feature shown in the figures to other elements or features. It should be understood that, in addition to the orientation shown in the figures, spatial relationship terms are intended to also include different orientations of the device in use and operation. For example, if the device in the figures is flipped, then an element or feature described as "under" or "beneath" or "below" another element or feature will be oriented "on" the other element or feature. Thus, the exemplary terms "under" and "beneath" can include both an upper and a lower orientation. The device may be otherwise oriented (rotated 90 degrees or other orientations) and the spatial descriptors used herein are to be interpreted accordingly.

[0081] The purpose of the terms used herein is only to describe specific embodiments and is not a limitation of the present disclosure. As used herein, the singular forms "a", "an" and "the" are also intended to include the plural forms unless the context clearly dictates otherwise. It should also be understood that the terms "comprising" and / or "including", when used in this specification, identify the presence of features, integers, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups. As used herein, the term "and / or" includes any and all combinations of the associated listed items.

[0082] The disclosed embodiments are described with reference to cross-sectional views that are schematic illustrations of ideal embodiments (and intermediate structures) of the present disclosure. As such, variations from the shown shapes due to, for example, manufacturing techniques and / or tolerances are to be expected. Accordingly, embodiments of the present disclosure should not be limited to the particular shapes of regions shown herein, but include shape deviations resulting from, for example, manufacturing. The regions shown in the figures are substantially schematic, and their shapes are not intended to show the actual shape of the regions of the device and are not intended to limit the scope of the present disclosure.

[0083] Figure 1 FIG. is a schematic structural view of a solar cell module provided by the present disclosure. Referring to Figure 1 as shown, the solar cell module includes a battery connector 20 and a plurality of solar cell wafers 10. Figure 2 FIG. is a schematic cross-sectional view of the battery connector 20. Referring to Figure 2 as shown, the battery connector 20 includes a carrier substrate 210 and a metal conductive layer 220 laminated on the carrier substrate 210. Two adjacent solar cell wafers 10 are electrically connected through the metal conductive layer 220 in the battery connector 20, and the metal conductive layer 220 is disposed between the solar cell wafer 10 and the carrier substrate 210.

[0084] In the solar cell module provided by the present disclosure, the metal conductive layer 220 is disposed on the carrier substrate 210, the metal conductive layer 220 is fixed by the carrier substrate 210, and the metal conductive layer 220 is disposed between the carrier substrate 210 and the solar cell module and is electrically connected to adjacent solar cell wafers 10 through the metal conductive layer 220. Since the metal conductive layer 220 is fixed by the carrier substrate 210 and the solar cell module, the problem of instantaneous deformation can be improved as much as possible during the connection process, and the long-term bonding stability between the metal conductive layer 220 and the solar cell wafer 10 can be better ensured, thereby improving the stability and safety of the solar cell module.

[0085] In some examples of this embodiment, the difference in the coefficient of thermal expansion between the carrier substrate 210 and the solar cell wafer 10 is smaller than the difference in the coefficient of thermal expansion between the metal conductive layer 220 and the solar cell wafer 10. By controlling the difference in the coefficient of thermal expansion between the carrier substrate 210 and the solar cell wafer 10 to be small, the deformation of the carrier substrate 210 during connection and actual use can be relatively small as the temperature changes, and thus the long-term use stability of the battery connector 20 can be better ensured.

[0086] In some examples of this embodiment, the hardness of the carrier substrate 210 is greater than the hardness of the metal conductive layer 220. By setting the hardness of the carrier substrate 210 to be relatively large, the carrier substrate 210 can fix the metal conductive layer 220 and improve the problem of unstable bonding caused by deformation of the metal conductive layer 220.

[0087] In some examples of this embodiment, the density of the carrier substrate 210 is less than the density of the metal conductive layer 220. By selecting the carrier substrate 210 with a smaller density, the product cost can be reduced and the overall weight of the solar cell module can be lightened.

[0088] In some examples of this embodiment, the material of the carrier substrate 210 can be a non-metal material. Further, the material of the carrier substrate 210 can include one or more of semiconductor materials and insulating materials.

[0089] In other examples of this embodiment, the material of the carrier substrate 210 can include one or more of silicon, silicon nitride, silicon carbide, gallium arsenide, conductive metal oxides, quartz, glass, ceramics, and sapphire. Among them, the conductive metal oxides can include, but are not limited to, indium tin oxide, indium zinc oxide, indium gallium zinc oxide, aluminum zinc oxide, or fluorine-doped tin oxide.

[0090] In this embodiment, the material of the carrier substrate 210 can include the substrate material of the solar cell 10. Further, the material of the carrier substrate 210 can be the same as the substrate material of the solar cell 10. For example, if the substrate material of the solar cell 10 is a silicon material, the material of the carrier substrate 210 can also be selected from silicon materials such as single-crystalline silicon or polycrystalline silicon. Further, the material of the carrier substrate 210 can be a doped or undoped silicon material.

[0091] In some examples of this embodiment, the carrier substrate 210 includes silicon, and the mass content of silicon in the carrier substrate 210 can be more than 70%.

[0092] In some examples of this embodiment, the material of the metal conductive layer 220 includes one or more of silver, copper, aluminum, tin, and lead. Further, the material of the metal conductive layer 220 can include a metal elemental material or an alloy material, where the metal element can be selected from silver, copper, aluminum, tin, or lead, and the alloy material can be an alloy material including the metal element.

[0093] In some examples of this embodiment, the thickness of the carrier substrate 210 is greater than the thickness of the metal conductive layer 220. By setting the thickness of the carrier substrate 210 to be greater than the thickness of the metal conductive layer 220, the overall stability of the solar cell module can be ensured as much as possible.

[0094] In some examples of this embodiment, the thickness of the carrier substrate 210 can be 50 μm to 300 μm. For example, the thickness of the carrier substrate 210 can be 50 μm, 70 μm, 100 μm, 120 μm, 150 μm, 200 μm, 250 μm, 300 μm, or the thickness of the carrier substrate 210 can also be between any two of the above thicknesses. By controlling the thickness of the carrier substrate 210 to be 50 μm to 300 μm, the carrier substrate 210 can have a more appropriate strength, and the problem that the overall thickness of the solar module is too thick caused by introducing the carrier substrate 210 can be avoided as much as possible.

[0095] In some examples of this embodiment, the thickness of the metal conductive layer 220 can be 1 μm to 50 μm. For example, the thickness of the metal conductive layer 220 can be 1 μm, 2 μm, 5 μm, 10 μm, 15 μm, 20 μm, 30 μm, 50 μm, or the thickness of the metal conductive layer 220 can also be between any two of the above thicknesses. By controlling the thickness of the metal conductive layer 220 to be 1 μm to 50 μm, its internal stress during use can be reduced while ensuring its conductivity.

[0096] In addition, the solder tapes in the traditional technology are usually tinned copper tapes or tinned copper wires, and their thicknesses are usually above 0.1 mm, which requires significantly more metal materials. In the present disclosure, by disposing the metal conductive layer 220 on the carrier substrate 210, the metal conductive layer 220 can be directly prepared on the carrier substrate 210, so that the thickness of the metal conductive layer 220 can be controlled to be relatively low, which also helps to save the cost of raw materials.

[0097] Refer to Figure 2 As shown, in some examples of this embodiment, the battery connector 20 can further include a spacer layer 230 disposed between the carrier substrate 210 and the metal conductive layer 220. The spacer layer 230 is disposed between the carrier substrate 210 and the metal conductive layer 220, and the material of the spacer layer 230 can be different from that of the carrier substrate 210. By providing the spacer layer 230, the material selection of the carrier substrate 210 can be made more extensive. In some other examples, the battery connector 20 may also not have the spacer layer 230, so that the metal conductive layer 220 is in direct contact with the carrier substrate 210.

[0098] The material of the spacer layer 230 can be selected according to actual needs to achieve different functions and meet different needs. For example, the material of the spacer layer 230 can be a conductive material to improve the conductivity of the metal conductive layer 220, the material of the spacer layer 230 can also be an insulating material to insulate the metal conductive layer 220 and the carrier substrate 210, and the material of the spacer layer 230 can also be an adhesive material to improve the bonding strength between the metal conductive layer 220 and the carrier substrate 210. In some examples of this embodiment, the material of the spacer layer 230 may include silicon nitride, metal conductive oxide or organic matter.

[0099] In some examples of this embodiment, the thickness of the spacer layer 230 may be 0.1 μm to 500 μm. For example, the thickness of the spacer layer 230 may be 0.1 μm, 1 μm, 5 μm, 10 μm, 20 μm, 50 μm, 100 μm, 200 μm, 300 μm, 400 μm, 500 μm, or the thickness of the spacer layer 230 may be between any two of the above thicknesses.

[0100] In some examples of this embodiment, the metal conductive layer 220 can be attached to the carrier substrate 210 by printing, electroplating, chemical plating, bonding, spraying, sputtering or deposition.

[0101] Reference Figure 2 As shown, in some examples of this embodiment, the carrier substrate 210 in the battery connector 20 may be a semiconductor, and the battery connector 20 may further include a conductive reinforcement layer 240 disposed on a side of the carrier substrate 210 away from the metal conductive layer 220. In other examples, the carrier substrate 210 in the battery connector 20 may be an insulator.

[0102] In some examples of this embodiment, the material of the conductive reinforcement layer 240 may be a metal material. The material of the conductive reinforcement layer 240 may include a metal element or an alloy material, wherein the metal element may be selected from silver, copper, aluminum, tin or lead, and the alloy material may be an alloy material including the metal element.

[0103] In this embodiment, the metal conductive layer 220 may cover the entire surface of the carrier substrate 210 close to the solar cell 10 , or the metal conductive layer 220 may be patterned, in which case the metal conductive layer 220 covers a portion of the surface of the carrier substrate 210 .

[0104] In some examples of this embodiment, the solar cell 10 includes a cell substrate 110 and an electrode 120 disposed on the back side of the cell substrate 110 , and the metal conductive layer 220 is electrically connected to the electrode 120 .

[0105] In some examples of this embodiment, the material of the electrode 120 may include one or more of silver, copper, aluminum, tin, or lead.

[0106] Wherein, in this embodiment, the metal conductive layer 220 may be disposed between the solar cell 10 and the carrier substrate 210 in various ways.

[0107] Figure 3 As shown in Figure 1 a schematic cross-sectional structure diagram of a solar cell module. Referring to Figure 3 as shown, the solar cell 10 includes a cell substrate 110 and an electrode 120 disposed on the back surface of the cell substrate 110, and the metal conductive layer 220 may be welded to the electrode 120. It can be understood that when the metal conductive layer 220 is welded to the electrode 120, the material of the electrode 120 and the material of the metal conductive layer 220 may be mixed.

[0108] Furthermore, the method of welding the metal conductive layer 220 to the electrode 120 may include but is not limited to soldering iron heating welding, infrared heating welding, laser heating welding, or electromagnetic heating welding. It can be understood that the heating method can be appropriately selected according to the material of the metal conductive layer 220 and the material of the electrode 120.

[0109] Figure 4 As shown in Figure 1 a schematic cross-sectional structure diagram of a solar cell module. Referring to Figure 4 as shown, the solar cell 10 includes a cell substrate 110 and an electrode 120 disposed on the back surface of the cell substrate 110, and the solar cell module may include a conductive adhesion layer 310. The conductive adhesion layer 310 is disposed between the metal conductive layer 220 and the electrode 120, and the metal conductive layer 220 may be electrically connected to the electrode 120 through the conductive adhesion layer 310. It can be understood that the conductive adhesion layer 310 should have conductivity.

[0110] In some examples of this embodiment, the material of the conductive adhesion layer 310 may be selected from conductive glue or solder paste. For example, when the material of the conductive adhesion layer 310 is selected from conductive glue, the metal conductive layer 220 may be adhered to the electrode 120 through the conductive glue. Another example is that when the material of the conductive adhesion layer 310 is selected from solder paste, the solder paste may be placed on the electrode 120 and heated to melt the solder paste, and then the metal conductive layer 220 is adhered to the solder paste.

[0111] Figure 5 As shown in Figure 1 a schematic cross-sectional structure diagram of a solar cell module, referring to Figure 5As shown, the solar cell 10 includes a cell substrate 110 and electrodes 120 disposed on the cell substrate 110. The solar cell module may include an adhesive layer 320. The adhesive layer 320 may be disposed between the cell substrate 110 and the carrier substrate 210, and the adhesive layer 320 is located on the side of the electrodes 120. The carrier substrate 210 is adhered to the cell substrate 110 through the adhesive layer 320, and the metal conductive layer 220 is fixedly connected to the electrodes 120.

[0112] It can be understood that the adhesive layer 320 is used to bond the cell substrate 110 and the carrier substrate 210 to fix the positions of the carrier substrate 210 and the metal conductive layer 220. In some examples of this embodiment, the material of the adhesive layer 320 may be a conductive material. In some other examples, the material of the adhesive layer 320 may also be an insulating material.

[0113] In some examples of this embodiment, the material of the adhesive layer 320 is selected from heat-shrinkable materials. Among them, the heat-shrinkable material refers to a material that can shrink after heating. Bonding the cell substrate 110 and the substrate with the heat-shrinkable material, heating can cause the adhesive layer 320 to shrink, thereby minimizing the gap between the cell substrate 110 and the substrate and making the contact between the metal conductive layer 220 and the electrodes 120 closer.

[0114] Furthermore, in this embodiment, the metal conductive layer 220 can also be welded to the electrodes 120 in the solar cell 10, or the metal conductive layer 220 can be electrically connected to the electrodes 120 through a conductive adhesive layer 310.

[0115] It can be understood that Figures 3 - 5 The three connection methods provided in the present disclosure can all effectively electrically connect the metal conductive layer 220 to the electrodes 120. In other examples, other reasonable methods can also be used to electrically connect the metal conductive layer 220 to the electrodes 120.

[0116] In some examples of this embodiment, the solar cell 10 includes a cell substrate 110 and a plurality of electrodes 120 disposed on the back surface of the cell substrate 110. The plurality of electrodes 120 include a first electrode 121 and a second electrode 122 with opposite polarities. Among two adjacent solar cells 10, a first electrode 121 of one solar cell 10 and a second electrode 122 of the other solar cell 10 form an electrode group, and the first electrode 121 and the second electrode 122 in the electrode group can be electrically connected through the cell connector 20. It can be understood that since the polarities of the first electrode 121 and the second electrode 122 are opposite, two adjacent solar cells 10 are connected in series. In this embodiment, for the sake of illustration, the first electrode 121 is the positive electrode of the solar cell 10, and the second electrode 122 is the negative electrode of the solar cell 10.

[0117] Further, in some examples of this embodiment, a battery connector 20 may be connected to only one set of electrodes 120, or a battery connector 20 may also be connected to multiple sets of electrodes 120 simultaneously.

[0118] Further, in some examples of this embodiment, a battery connector 20 may also be connected to three or more solar cells 10 simultaneously.

[0119] In some examples of this embodiment, the metal conductive layer 220 may include a linear conductive portion 221, and the linear conductive portion 221 may be connected to one set of electrodes. Further, there may be only one linear conductive portion 221 in the metal conductive layer 220, or there may be multiple linear conductive portions 221 in the metal conductive layer 220, and the multiple linear conductive portions 221 are arranged at intervals.

[0120] In some examples of this embodiment, the metal conductive layer 220 may include a sheet-like conductive portion 222, and the sheet-like conductive portion 222 may be connected to multiple sets of electrodes.

[0121] It can be understood that, in some examples of this embodiment, the metal conductive layer 220 may include both a sheet-like conductive portion 222 and a linear conductive portion 221. The sheet-like conductive portion 222 may be electrically connected to the linear conductive portion 221, or the sheet-like conductive portion 222 may also be arranged at intervals from the linear conductive portion 221.

[0122] The present disclosure's Figure 6 is a top view structural schematic diagram of a battery connector 20. Referring to Figure 6 as shown, in this battery connector 20, the metal conductive layer 220 may include multiple linear conductive portions 221. Among them, each linear conductive portion 221 may be connected to a set of electrodes 120 in two adjacent solar cells 10, so as to conduct electricity between the two solar cells 10. It can be understood that a set of electrodes 120 refers to an electrode 120 in one solar cell 10 and a corresponding electrode 120 in another solar cell 10. For example, a positive electrode in one solar cell 10 and a corresponding negative electrode in another solar cell 10 connected thereto.

[0123] Referring to Figure 6 as shown, in this embodiment, the metal conductive layer 220 may include multiple linearly spaced-apart conductive portions 221, and each of the linear conductive portions 221 may be connected to one set of electrodes in two adjacent solar cells 10. Thus, the metal conductive layer 220 as a whole may be connected to multiple sets of electrodes.

[0124] The present disclosure's Figure 7 is a top view structural schematic diagram of a battery connector 20. Referring to Figure 7As shown, in the battery connector 20, the metal conductive layer 220 may include a linear conductive portion 221. Among them, the linear conductive portion 221 may be connected to a group of electrodes 120 in two adjacent solar cells 10, so that the two solar cells 10 are electrically connected. The linear conductive portion 221 may cover a partial surface of the carrier substrate 210. At this time, the battery connector 20 is only connected to a group of electrodes 120 in two adjacent solar cells 10.

[0125] In some other examples, the linear conductive portion 221 may also cover the entire surface of the carrier substrate 210.

[0126] The present disclosure's Figure 8 is a top view structural schematic diagram of a battery connector 20. Referring to Figure 8 as shown, the metal conductive layer 220 in the battery connector 20 includes a linear conductive portion 221. Further, the battery connector 20 further includes a first connection segment 251 and a second connection segment 252 located on the carrier substrate 210, and the first connection segment 251 and the second connection segment 252 are arranged at intervals.

[0127] Among them, the first connection segment 251 and the second connection segment 252 may extend in the same direction. The carrier substrate 210 has two opposite side edges, and both ends of the linear conductive portion 221 are respectively abutted against the two side edges, and the end of the first connection segment 251 far from the second connection segment 252 and the end of the second connection segment 252 far from the first connection segment 251 are respectively abutted against the two side edges. In actual use, two battery connectors 20 may be used in cooperation. For example, the continuous conductive wire of the first battery connector 20 may be electrically connected to the first connection segment 251 of the second battery connector 20, and the continuous conductive wire in the second battery connector 20 may be electrically connected to the second connection segment 252 of the first battery connector 20.

[0128] The present disclosure's Figure 9 is a top view structural schematic diagram of a battery connector 20. Referring to Figure 9 as shown, the metal conductive layer 220 in the battery connector 20 includes a linear conductive portion 221. Further, the battery connector 20 further includes a conductive connection pad 260, and the conductive connection pad 260 is arranged on the linear conductive portion 221 and connected to the linear conductive portion 221.

[0129] In some examples of this embodiment, the width of the conductive connection pad 260 is greater than the width of the linear conductive portion 221.

[0130] In some examples of this embodiment, the material of the conductive connection pad 260 may be the same as the material of the linear conductive portion 221. In other examples, the material of the conductive connection pad 260 may also be different from the material of the linear conductive portion 221.

[0131] In some examples of this embodiment, the material of the conductive connection pad 260 may be a metallic material.

[0132] In some examples of this embodiment, the surface of the conductive connection pad 260 is flush with the surface of the linear conductive portion 221.

[0133] In Figure 9 In the battery connector 20 as shown, the conductive connection pad 260 can be used to increase the conductivity and adhesion between the conductive wire and the electrode 120 of the solar cell 10, thereby further improving the electrical contact performance and bonding stability between the battery connector 20 and the solar cell 10.

[0134] The Figure 10 is a schematic structural diagram of a battery connector 20. Referring to Figure 10 as shown, the metal conductive layer 220 in the battery connector 20 includes a linear conductive portion 221. The Figure 10 The structure of the battery connector 20 shown is similar to the structure of the battery connector 20 shown in Figure 8 Further, the battery connector 20 further includes conductive branch lines 270. The positions of the conductive branch lines 270 may correspond to the positions of the fine grid electrodes 120 in the solar cell. The conductive branch lines 270 can be connected to the linear conductive portion 221. The conductive branch lines 270 can also be connected to the first connection section 251 and the second connection section 252.

[0135] Wherein, the conductive branch lines 270 can be in contact with the fine grid electrodes 120 in the solar cell to improve the electrical contact performance between the battery connector 20 and the solar cell.

[0136] In some examples of this embodiment, the metal conductive layer 220 includes a plurality of linear conductive portions 221, and a plurality of conductive branch lines 270 are connected to each linear conductive portion 221.

[0137] In some examples of this embodiment, conductive branch lines 270 are provided on both sides of the linear conductive portion 221.

[0138] Figure 11 is a schematic structural diagram of a solar cell 10. Referring to Figure 11As shown, in the battery connector 20, the metal conductive layer 220 may include a sheet-shaped conductive portion 222. The sheet-shaped conductive portion 222 is disposed on a surface of the carrier substrate 210 close to the solar cell 10, and the sheet-shaped conductive portion 222 may cover a partial surface of the carrier substrate 210. Among them, the sheet-shaped conductive portion 222 may be simultaneously connected to multiple groups of electrodes 120 in two adjacent solar cells 10, so that the two solar cells 10 are electrically connected. It can be understood that the multiple groups of electrodes 120 include multiple electrodes 120 in one solar cell 10 and corresponding multiple electrodes 120 in another solar cell 10 connected thereto. For example, multiple positive electrodes in one solar cell 10 and corresponding multiple negative electrodes in another solar cell 10 connected thereto.

[0139] In some other examples, the sheet-shaped conductive portion 222 may also cover the entire surface of the carrier substrate 210.

[0140] In some other examples, the metal conductive layer 220 may also include multiple sheet-shaped conductive portions 222 arranged at intervals.

[0141] In some examples of this embodiment, the sheet-shaped conductive portion 222 may be strip-shaped. Further, the sheet-shaped conductive portion 222 may be rectangular. However, it can be understood that in some other examples, the sheet-shaped conductive portion 222 may also be in other regular shapes, or the shape of the sheet-shaped conductive portion 222 may also be irregular, as long as it can electrically connect two adjacent solar cells 10.

[0142] It can be understood that in the present disclosure, the "linear conductive portion 221" and the "sheet-shaped conductive portion 222" are only used to distinguish the number of electrode groups that can be connected, and do not mean the size relationship between the two. Additionally, Figures 6 - 11 It is only used for illustrative purposes. In addition to the linear conductive portion 221 and the sheet-shaped conductive portion 222, the metal conductive layer 220 may also adopt other reasonable setting methods, and the metal conductive layer 220 may also include other components with auxiliary functions, which can be correspondingly set according to the electrode 120 structure of the corresponding solar cell 10.

[0143] It can be understood that the shape of the metal conductive layer 220 in the battery connector 20 in each of the above embodiments can be selected according to the actual needs of the solar cell 10. To facilitate understanding of the cooperation mode between the battery connector 20 and the solar cell 10, the present disclosure also provides the following embodiments of the solar cell 10 and the corresponding solar cell module.

[0144] Figure 12 It is a schematic diagram of the surface structure of a solar cell 10. Refer to Figure 12As shown, the electrodes 120 of the solar cell 10 include a first electrode 121 and a second electrode 122, where the polarities of the first electrode 121 and the second electrode 122 are opposite. In this embodiment, the first electrode 121 is the positive electrode and the second electrode 122 is the negative electrode.

[0145] In some examples of this embodiment, both the first electrode 121 and the second electrode 122 can have multiple strips, and the multiple first electrodes 121 and the multiple second electrodes 122 are alternately arranged at intervals.

[0146] In some examples of this embodiment, the extending directions of the first electrode 121 and the second electrode 122 are parallel.

[0147] In some examples of this embodiment, in a solar cell module, the juxtaposing direction of multiple solar cells 10 is the same as the extending direction of the first electrode 121 and the second electrode 122, or the juxtaposing direction of multiple solar cells 10 can also intersect with the extending direction of the first electrode 121 and the second electrode 122.

[0148] Figure 13 To include as Figure 12 shown solar cell 10 and Figure 6 shown battery connector 20 of the structural schematic diagram of a solar cell module. For ease of understanding, Figure 13 the carrier substrate 210 in the battery connector 20 is omitted to expose the position of the metal conductive layer 220 therein. Referring to Figure 13 shown, in some examples of this embodiment, in a solar cell module, the juxtaposing direction of multiple solar cells 10 is the same as the extending direction of the first electrode 121 and the second electrode 122. The first electrode 121 of a first solar cell 10 and the second electrode 122 of a second solar cell 10 form an electrode group. The battery connector 20 includes multiple linear conductive portions 221, and each linear conductive portion 221 straddles two adjacent solar cells 10, and each linear conductive portion 221 is electrically connected to an electrode group.

[0149] In some examples of this embodiment, among two adjacent solar cells 10, the two electrodes 120 in an electrode group extend in the same direction. The metal conductive layer 220 includes a linear conductive portion 221, and the extending direction of the linear conductive portion 221 is the same as the extending direction of the two electrodes 120 in the electrode group.

[0150] For ease of description, referring to Figure 13As shown, among two adjacent solar cell chips 10, the first solar cell chip 10 is the first cell chip 11, and the second solar cell chip 10 is the second cell chip 12. The first electrode 121 and the second electrode 122 in the first cell chip 11 are respectively the first positive electrode 1211 and the first negative electrode 1221, and the first electrode 121 and the second electrode 122 in the second cell chip 12 are respectively the second positive electrode 1212 and the second negative electrode 1222. Each linear conductive part 221 is connected to one first positive electrode 1211 and one second negative electrode 1222.

[0151] In some examples of this embodiment, the linear conductive part 221 can partially cover the first positive electrode 1211 and / or the second negative electrode 1222.

[0152] In some examples of this embodiment, the material of the carrier substrate 210 is a semiconductor material, and the battery connector 20 can also include a conductive enhancement layer 240 provided on the side of the carrier substrate 210 away from the metal conductive layer 220. By providing the conductive enhancement layer 240, the conductive ability of the battery connector 20 can be fully ensured.

[0153] In Figure 13 In the structure shown, the electrical connection between the solar cell chip 10 and the battery connector 20 can be achieved through the connection method shown in Figures 3 - 5 shown.

[0154] Figure 14 It is a schematic structural diagram of a solar cell module including the solar cell chip 10 shown in Figure 12 and the battery connector 20 shown in Figure 7 For ease of understanding, Figure 14 the carrier substrate 210 in the battery connector 20 is omitted in Figure 14 to expose the position of the metal conductive layer 220 therein. Referring to Figure 14 shown, in some examples of this embodiment, in the solar cell module, the juxtaposition direction of multiple solar cell chips 10 is the same as the extension direction of the first electrode 121 and the second electrode 122. In this solar cell module, the battery connector 20 includes one linear conductive part 221, and there can be multiple battery connectors 20. The linear conductive part 221 in each battery connector 20 straddles two adjacent solar cell chips 10, and the linear conductive part 221 is electrically connected to a group of electrodes 120.

[0155] For ease of description, refer to Figure 14As shown, among two adjacent solar cell chips 10, the first solar cell chip 10 is the first cell chip 11, and the second solar cell chip 10 is the second cell chip 12. The first electrode 121 and the second electrode 122 in the first cell chip 11 are respectively the first positive electrode 1211 and the first negative electrode 1221, and the first electrode 121 and the second electrode 122 in the second cell chip 12 are respectively the second positive electrode 1212 and the second negative electrode 1222. The linear conductive part 221 in each cell connector 20 is connected to one first positive electrode 1211 and one second negative electrode 1222.

[0156] In some examples of this embodiment, each first electrode 121 and each second electrode 122 are partially covered by the corresponding linear conductive part 221. In some other examples, the linear conductive part 221 can also be partially covered on the first electrode 121 and / or the second electrode 122.

[0157] In some examples of this embodiment, the material of the carrier substrate 210 is a semiconductor material, and the cell connector 20 can also include a conductive enhancement layer 240 provided on the side of the carrier substrate 210 away from the metal conductive layer 220. By providing the conductive enhancement layer 240, the conductive ability of the cell connector 20 can be fully guaranteed.

[0158] In the structure as Figure 14 shown, the electrical connection between the solar cell chip 10 and the cell connector 20 can be achieved through the connection method as Figures 3 - 5 shown.

[0159] Figure 15 For including the solar cell chip 10 as Figure 12 shown and Figure 8 the cell connector 20 as Figure 15 shown is a schematic structural diagram of a solar cell module. For ease of understanding, Figure 15 the carrier substrate 210 in the cell connector 20 is omitted in

[0160] shown to expose the position of the metal conductive layer 220 therein. Referring to Figure 15As shown, the linear conductive part 221 in each battery connector 20 can be disposed across two adjacent solar cells 10, and is connected to the first electrode 121 in one of the solar cells 10 and the second electrode 122 in the other solar cell 10. The first connection section 251 and the second connection section 252 in each battery connector 20 are respectively disposed on the two solar cells 10. Among three consecutive battery connectors 20, both ends of the linear conductive part 221 in the middle battery connector 20 are respectively in contact with the first connection section 251 in the front-side battery connector 20 and the second connection section 252 in the rear-side battery connector 20.

[0161] Further, the second connection section 252 in the middle battery connector 20 can be in contact with the linear conductive part 221 in the front-side battery connector 20, and the first connection section 251 in the middle battery connector 20 can be in contact with the linear conductive part 221 in the rear-side battery connector 20. It can be understood that the linear conductive part 221 can only cover a part of the first electrode 121 and the second electrode 122. By providing the first connection section 251 and the second connection section 252, the electrical contact area can be increased, thereby further enhancing the conductivity between the battery connector 20 and the solar cell 10.

[0162] Specifically, as shown in Figure 15 Among two adjacent solar cells 10, the first solar cell 10 is the first battery cell 11, and the second solar cell 10 is the second battery cell 12. The first electrode 121 and the second electrode 122 in the first battery cell 11 are respectively the first positive electrode 1211 and the first negative electrode 1221, and the first electrode 121 and the second electrode 122 in the second battery cell 12 are respectively the second positive electrode 1212 and the second negative electrode 1222. Three consecutive battery connectors 20 include a middle connector 21, a front-side connector 22, and a rear-side connector 23. The front-side connector 22 and the rear-side connector 23 are respectively disposed on both sides of the middle connector 21. The middle connector 21 is disposed across the first battery cell 11 and the second battery cell 12. The linear conductive part 221, the first connection section 251, and the second connection section 252 in the middle connector 21 are respectively the middle conductive part 2211, the middle first connection section 2511, and the middle second connection section 2521. The linear conductive part 221, the first connection section 251, and the second connection section 252 in the front-side connector 22 are respectively the front-side linear conductive part 221, the front-side first connection section 251, and the front-side second connection section 2522. The linear conductive part 221, the first connection section 251, and the second connection section 252 in the rear-side connector 23 are respectively the rear-side linear conductive part 221, the rear-side first connection section 2513, and the rear-side second connection section 252.

[0163] Referring to Figure 15As shown, both ends of the middle conductive portion 2211 are respectively connected to the first front connection segment 251 and the second rear connection segment 252. The middle second connection segment 2521 is connected to the front linear conductive portion 221, and the middle first connection segment 2511 is connected to the rear linear conductive portion 221. It can be understood that the middle conductive portion 2211 only covers a part of the first positive electrode 1211 and the second negative electrode 1222. By providing the first front connection segment 251 and the second rear connection segment 252, the contact area between the battery connector 20 and the electrode 120 of the solar cell 10 can be increased, thereby further enhancing the electrical conductivity between the battery connector 20 and the solar cell 10.

[0164] In the structure shown in Figure 15 the electrical connection between the solar cell 10 and the battery connector 20 can be achieved by the connection method shown in Figures 3 - 5 .

[0165] Figure 16 It is a schematic structural diagram of a solar cell module including the solar cell 10 shown in Figure 12 and the battery connector 20 shown in Figure 11 . For the sake of easy understanding, the carrier substrate 210 in the battery connector 20 is omitted in Figure 16 to expose the position of the metal conductive layer 220 therein. Referring to Figure 16 shown, in this solar cell module, a plurality of solar cells 10 are arranged in parallel in a direction intersecting the extending direction of the electrode 120. The metal conductive layer 220 includes a sheet-shaped conductive portion 222. The sheet-shaped conductive portion 222 is in a long strip shape, and the extending direction of the sheet-shaped conductive portion 222 also intersects the extending direction of the electrode 120. This solar cell module further includes a first spacer and a second spacer. The first spacer is disposed on the first electrode 121 and protrudes from the surface of the first electrode 121. The second spacer is disposed on the second electrode 122 and protrudes from the surface of the second electrode 122. The materials of the first spacer and the second spacer both include conductive materials.

[0166] Referring to Figure 16 shown, the sheet-shaped conductive portion 222 is connected to the first spacer located on one of the solar cells 10 and the second spacer located on another solar cell 10 to be electrically connected to a set of electrodes 120. It can be understood that since the surface of the first spacer protrudes from the second electrode 122, the sheet-shaped conductive portion 222 will not contact the electrodes 120 with opposite polarities on the same solar cell 10, thereby avoiding short circuit when adjacent two solar cells 10 are conducted.

[0167] For the sake of easy explanation, referring to Figure 16As shown, among two adjacent solar cells 10, the first solar cell 10 is the first cell 11, and the second solar cell 10 is the second cell 12. The first electrode 121 and the second electrode 122 in the first cell 11 are the first positive electrode 1211 and the first negative electrode 1221 respectively, and the first electrode 121 and the second electrode 122 in the second cell 12 are the second positive electrode 1212 and the second negative electrode 1222 respectively. The first spacer and the second spacer disposed on the first cell 11 are the first positive electrode spacer 3311 and the first negative electrode spacer 3321 respectively, and the first spacer and the second spacer disposed on the second cell 12 are the second positive electrode spacer 3312 and the second negative electrode spacer 3322 respectively.

[0168] The sheet-shaped conductive part 222 can be in contact with a plurality of first positive electrode spacers 3311 located on the first cell 11 and in contact with a plurality of second negative electrode spacers 3322 located on the second cell 12 at the same time, so as to realize a series connection between the first cell 11 and the second cell 12. Since the surface of the first positive electrode spacer 3311 protrudes from the first negative electrode 1221 and the surface of the second negative electrode spacer 3322 protrudes from the second positive electrode 1212, the sheet-shaped conductive part 222 will not be short-circuited to the first negative electrode 1221 and the second positive electrode 1212.

[0169] In some examples of this embodiment, the battery connector 20 may include a plurality of sheet-shaped conductive parts 222 arranged at intervals, and each sheet-shaped conductive part 222 can be electrically connected to multiple groups of electrodes 120 to improve the conductivity of the electrodes 120. Further, the extending directions of the respective sheet-shaped conductive parts 222 may be the same.

[0170] In some examples of this embodiment, the electrical connection between the solar cell 10 and the battery connector 20 can be achieved in the manner as Figures 4 - 5 shown. Further, when the electrical connection is achieved in the manner as Figure 4 shown, the above-mentioned first spacer and second spacer can be used as the conductive adhesion layer 310, or first spacers and second spacers with materials different from those of the conductive adhesion layer 310 can be provided.

[0171] Figure 17 It is a schematic diagram of the surface structure of another solar cell 10. Referring to Figure 17 shown, the electrodes 120 of the solar cell 10 include a first electrode 121 and a second electrode 122, and the polarities of the first electrode 121 and the second electrode 122 are opposite. In this embodiment, Figure 17 the structure of the electrodes 120 on the solar cell 10 shown can be the same as that of Figure 12The structures of the electrodes 120 shown are basically the same, and the main difference is that the first electrode 121 and the second electrode 122 are the main gate electrodes 120, and the solar cell 10 also includes a fine gate electrode 120. Among them, the fine gate electrode 120 connected to the first electrode 121 is the first fine gate electrode 131, and the fine gate electrode 120 connected to the second electrode 122 is the second fine gate electrode 132. The extension direction of the first fine gate electrode 131 intersects with the extension direction of the first electrode 121 and the first fine gate electrode 131 is electrically connected to the first electrode 121, and the extension direction of the second fine gate electrode 132 intersects with the extension direction of the second electrode 122 and the second fine gate electrode 132 is electrically connected to the second electrode 122.

[0172] Figure 18 To include Figure 17 The solar cell sheet 10 and Figure 10 The schematic diagram of the structure of the solar cell assembly of the battery connector 20 is shown. For ease of understanding, Figure 18 The carrier substrate 210 in the battery connector 20 is omitted to expose the position of the metal conductive layer 220 therein. Figure 18 As shown, the solar cell sheet 10 in the solar cell assembly and the arrangement of the battery connection assembly can refer to Figure 15 The solar cell components in the are set up.

[0173] and Figure 15 The structure shown is different in that Figure 18 In the solar cell module shown, the solar cell sheet 10 includes a fine grid electrode 120 connected to the main grid electrode 120, the metal conductive layer 220 includes a linear conductive portion 221, and the cell connector 20 also includes a conductive branch line 270 corresponding to the fine grid electrode 120, the conductive branch line 270 is connected to the linear conductive portion 221, and the conductive branch line 270 contacts the fine grid electrode 120. It can be understood that the position of the conductive branch line 270 can correspond to the position of the fine grid electrode 120, so that the conductive branch line 270 can be aligned and contact the fine grid electrode 120. It can be understood that there can be multiple conductive branch lines 270, some of which can contact the first fine grid electrode 131, and some of which can contact the second fine grid electrode 132.

[0174] Figure 19 is a schematic diagram of the surface structure of a solar cell sheet 10, referring to Figure 19As shown, the multiple electrodes 120 of the solar cell 10 include a first electrode 121 and a second electrode 122, where the polarities of the first electrode 121 and the second electrode 122 are opposite. Further, on the cell substrate 110 of the solar cell 10, there are a first connection region 111 and a second connection region 112 arranged at intervals. One end of the first electrode 121 is located in the first connection region 111, and the first electrode 121 is arranged at an interval from the second connection region 112. One end of the second electrode 122 is located in the second connection region 112, and the second electrode 122 is arranged at an interval from the first connection region 111.

[0175] Referring to Figure 19 As shown, in some examples of this embodiment, the cell substrate 110 may include a first side and a second side arranged opposite to each other. The first connection region 111 is arranged between the second connection region 112 and the first side, and the second connection region 112 is arranged between the first connection region 111 and the second side.

[0176] In some examples of this embodiment, in the solar cell module, the juxtaposition direction of the multiple solar cells 10 is the same as the extension direction of the first electrode 121 and the second electrode 122, or alternatively, the juxtaposition direction of the multiple solar cells 10 may also intersect with the extension direction of the first electrode 121 and the second electrode 122.

[0177] Figure 20 For including Figure 19 As shown in the solar cell 10 and as Figure 6 Shown is a schematic structural diagram of a solar cell module including the battery connection member 20. For ease of understanding, Figure 20 In [reference], the carrier substrate 210 in the battery connection member 20 is omitted to expose the position of the metal conductive layer 220 therein. Referring to Figure 20 As shown, in this solar cell module, the juxtaposition direction of the multiple solar cells 10 may be the same as the extension direction of the first electrode 121 and the second electrode 122. The battery connection member 20 includes a plurality of linear conductive portions 221, and each linear conductive portion 221 can contact the first electrode 121 in the first solar cell 10 and the corresponding second electrode 122 in the second solar cell 10, so that two adjacent solar cells 10 are connected in series. It can be understood that the plurality of linear conductive portions 221 can respectively contact the plurality of first electrodes 121 and the corresponding plurality of second electrodes 122.

[0178] For ease of description, referring to Figure 20As shown, among two adjacent solar cells 10, the first solar cell 10 is the first cell 11, and the second solar cell 10 is the second cell 12. The first electrode 121 and the second electrode 122 in the first cell 11 are the first positive electrode 1211 and the first negative electrode 1221 respectively. The first connection region 111 and the second connection region 112 in the first cell 11 are the first positive electrode connection region 1111 and the first negative electrode connection region 1121 respectively. The first electrode 121 and the second electrode 122 in the second cell 12 are the second positive electrode 1212 and the second negative electrode 1222 respectively. The first connection region 111 and the second connection region 112 in the second cell 12 are the second positive electrode connection region 1112 and the second negative electrode connection region 1122 respectively. The first positive electrode connection region 1111 and the second negative electrode connection region 1122 are adjacent. Each linear conductive part 221 can be disposed on the first positive electrode connection region 1111 and the second negative electrode connection region 1122 and connected to a first positive electrode 1211 and a second negative electrode 1222.

[0179] In the structure shown as Figure 20 shown, the electrical connection between the solar cell 10 and the battery connection member 20 can be achieved by the connection method as Figures 3 - 5 shown.

[0180] It can be understood that in some other embodiments, Figure 19 the solar cell 10 shown as Figure 7 shown can also be connected by the battery connection member 20 as Figure 20 shown. The specific connection method can be similar to the solar cell module as

[0181] shown. The difference is that one battery connection member 20 only includes one linear conductive part 221. Correspondingly, one battery connection member 20 is connected to a group of electrodes 120. At this time, adjacent two solar cells 10 need to be connected by a plurality of battery connection members 20. Details are not described herein again. Figure 19 It can be understood that in some other embodiments, Figure 8 the solar cell 10 shown as Figure 15 shown can also be connected by the battery connection member 20 as Figure 15 shown. The specific connection method can be similar to the solar cell module as

[0182] Figure 21 is a schematic structural view of a solar cell module including the solar cell 10 as Figure 19 shown and the battery connection member 20 as Figure 11 shown. For the sake of easy understanding, Figure 21 the carrier substrate 210 in the battery connection member 20 is omitted inFigure 21 As shown, in this solar cell module, the juxtaposition direction of multiple solar cells 10 can be the same as the extending direction of the first electrode 121 and the second electrode 122. Refer to Figure 21 As shown, the sheet-shaped conductive part 222 in the battery connector 20 is disposed on the first connection area 111 of the first solar cell 10 and connected to multiple first electrodes 121. Moreover, the sheet-shaped conductive part 222 in the battery connector 20 is also disposed on the second connection area 112 of the second solar cell 10 and connected to multiple second electrodes 122, so that the first solar cell 10 and the second solar cell 10 are connected in series. It can be understood that the sheet-shaped conductive part 222 can be electrically connected to multiple groups of electrodes 120.

[0183] For the sake of convenience of description, refer to Figure 21 As shown, in two adjacent solar cells 10, the first solar cell 10 is the first cell 11, and the second solar cell 10 is the second cell 12. The first electrode 121 and the second electrode 122 in the first cell 11 are respectively the first positive electrode 1211 and the first negative electrode 1221. The first connection area 111 and the second connection area 112 in the first cell 11 are respectively the first positive electrode connection area 1111 and the first negative electrode connection area 1121. The first electrode 121 and the second electrode 122 in the second cell 12 are respectively the second positive electrode 1212 and the second negative electrode 1222. The first connection area 111 and the second connection area 112 in the second cell 12 are respectively the second positive electrode connection area 1112 and the second negative electrode connection area 1122. The first positive electrode connection area 1111 and the second negative electrode connection area 1122 are adjacent. The sheet-shaped conductive part 222 is disposed on the first positive electrode connection area 1111 and the second negative electrode connection area 1122 and connected to multiple first positive electrodes 1211 and multiple second negative electrodes 1222.

[0184] In the structure as Figure 21 shown, the electrical connection between the solar cell 10 and the battery connector 20 can be achieved through the connection method as Figures 3 - 5 shown.

[0185] It can be understood that in some other embodiments, Figure 19 the solar cell 10 as Figure 11 shown and the battery connector 20 as Figure 16 shown can also be connected with reference to the connection method as Figure 16 shown. Specifically, it can be understood by referring to the structure of the solar cell module as

[0186] Figure 22 is a schematic diagram of the surface structure of a solar cell 10. Refer to Figure 22As shown, the multiple electrodes 120 of the solar cell 10 include a first electrode 121 and a second electrode 122, where the polarities of the first electrode 121 and the second electrode 122 are opposite. Further, on the cell substrate 110 of the solar cell 10, there are a first connection area 111 and a second connection area 112 arranged at intervals. One end of the first electrode 121 is located in the first connection area 111, and the first electrode 121 is arranged at an interval from the second connection area 112. One end of the second electrode 122 is located in the second connection area 112, and the second electrode 122 is arranged at an interval from the first connection area 111.

[0187] Referring to Figure 22 As shown, in some examples of this embodiment, the cell substrate 110 may include a first side and a second side arranged oppositely. The first connection area 111 is arranged between the second connection area 112 and the first side, and the second connection area 112 is arranged between the first connection area 111 and the second side. It can be understood that Figure 22 the solar cell 10 shown in Figure 19 has basically the same electrode 120 structure as the solar cell 10 shown in

[0188] Further, different from Figure 19 the electrode 120 structure of the solar cell 10 shown in

[0189] this solar cell 10 further includes electrode 120 contact pads arranged on the electrode 120. Among them, the electrode 120 contact pad arranged on the first electrode 121 is the first contact pad 141, and the electrode 120 contact pad arranged on the second electrode 122 is the second contact pad 142. The first contact pad 141 and the second contact pad 142 can be respectively used to reduce the contact resistance between the first electrode 121 and the second electrode 122 and the metal conductive layer 220.

[0190] In some examples of this embodiment, the electrode 120 contact pads are arranged between the first connection area 111 and the second connection area 112.

[0191] In some examples of this embodiment, the width of the electrode 120 contact pads can be greater than the width of the electrode 120.

[0192] In some examples of this embodiment, the materials of the first contact pad 141 and the second contact pad 142 can be metal materials.

[0193] In some examples of this embodiment, the surfaces of the first contact pad 141 and the second contact pad 142 are flush with the surface of the electrode 120.

[0194] Figure 23 To include as Figure 22 shown in the solar cell chip 10 and Figure 9 shown in the battery connector 20 of the structural schematic diagram of the solar cell module. Referring to Figure 23 shown, the solar cell module includes a plurality of solar cell chips 10. Among two adjacent solar cell chips 10, the first connection region 111 in the first solar cell chip 10 is adjacent to the second connection region 112 in the second solar cell chip 10. The metal conductive layer 220 straddles two adjacent solar cell chips 10. The metal conductive layer 220 can be disposed on the first connection region 111 in the first solar cell chip 10 and connected to the first electrode 121 on this solar cell chip 10. The metal conductive layer 220 can also be disposed on the second connection region 112 in the second solar cell chip 10 and connected to the second electrode 122 on this solar cell chip 10, so that two adjacent solar cell chips 10 are connected in series. Further, the first contact pad 141 and the second contact pad 142 in the solar cell chip 10 are both in butt contact with the conductive connection pad 260. In this embodiment, by providing the conductive connection pad 260, the conductive performance between the battery connector 20 and the solar cell chip 10 can be further improved.

[0195] For the convenience of description, referring to Figure 23As shown in the figure, among two adjacent solar cells 10, the first solar cell 10 is the first cell 11, and the second solar cell 10 is the second cell 12. The first electrode 121 and the second electrode 122 in the first cell 11 are the first positive electrode 1211 and the first negative electrode 1221 respectively. The first connection region 111 and the second connection region 112 in the first cell 11 are the first positive electrode connection region 1111 and the first negative electrode connection region 1121 respectively. The first electrode 121 and the second electrode 122 in the second cell 12 are the second positive electrode 1212 and the second negative electrode 1222 respectively. The first connection region 111 and the second connection region 112 in the second cell 12 are the second positive electrode connection region 1112 and the second negative electrode connection region 1122 respectively. One first positive electrode 1211 and one second negative electrode 1222 form a group of electrodes 120. The first positive electrode connection region 1111 and the second negative electrode connection region 1122 are adjacent. Each linear conductive part 221 is disposed on the first positive electrode connection region 1111 and the second negative electrode connection region 1122 and is connected to a group of electrodes 120. Both ends of the linear conductive part 221 are connected with conductive contact pads, and these two conductive contact pads respectively cover the first contact pad 141 on the first positive electrode 1211 and the second contact pad 142 on the second negative electrode 1222.

[0196] In the structure shown in Figure 23 the figure, the electrical connection between the solar cell 10 and the battery connector 20 can be achieved through the connection method shown in Figures 3 - 5 the figure.

[0197] It can be understood that the solar cell 10 shown in Figure 22 the figure can also be connected by other battery connectors 20 to form a solar cell module. The corresponding connection method between the battery connector 20 and the solar cell 10 in the above text can be referred to for corresponding settings, which will not be elaborated here.

[0198] The solar cell module of the present disclosure further includes a PN junction 280 disposed on the battery connector 20. Both ends of the PN junction 280 can be electrically connected to the positive electrode and the negative electrode on the same solar cell 10 respectively, and the P end of the PN junction 280 is electrically connected to the negative electrode, and the N end of the PN junction 280 is electrically connected to the positive electrode. It can be understood that the current direction of the PN junction 280 is reverse-biased compared with that of the solar cell 10. When one of the solar cells is shaded, the current can flow through the PN junction 280 instead of being consumed by other solar cells 10, thereby reducing the product quality problems and safety risks caused by the hot spot effect.

[0199] In the traditional technology, when setting a bypass diode, it is usually necessary to set additional circuits and diode devices. In addition, a corresponding junction box needs to be configured, but this setting method requires a relatively large volume.

[0200] In the present disclosure, by providing a PN junction 280 on the battery connection member 20, the PN junction 280 can be directly connected to the electrode 120 of the solar cell 10, thereby effectively saving the volume required for the diode device and the junction box in the conventional technology, and also saving the corresponding additional circuit. In addition, limited by the setting of the circuit and the junction box, usually only one bypass diode can be provided in one solar cell string in the conventional technology, while this method in the present disclosure enables each solar cell 10 to be a setting site for the PN junction 280, so it also helps to increase the number of PN junctions 280, thereby more accurately avoiding the failed or shaded solar cells 10.

[0201] In some embodiments, among two adjacent solar cells 10, the metal conductive layers 220 in the battery connection member 20 are respectively connected to the first electrode 121 in one solar cell 10 and the second electrode 122 in the other solar cell 10. In this embodiment, one end of the PN junction 280 in the battery connection member 20 can be electrically connected to the metal conductive layer 220, and the other end can be electrically connected to the electrode 120 with the opposite polarity in the corresponding solar cell 10. For example, the metal conductive layer 220 can be electrically connected to the positive electrode in one solar cell 10, then the N end of the PN junction 280 can be electrically connected to the metal conductive layer 220, and the P end can be electrically connected to the negative electrode in this solar cell 10; or, the metal conductive layer 220 can be electrically connected to the negative electrode in one solar cell 10, then the P end of the PN junction 280 can be electrically connected to the metal conductive layer 220, and the N end can be electrically connected to the positive electrode in this solar cell 10.

[0202] In some examples of this embodiment, the carrier substrate 210 can be a semiconductor, the PN junction 280 can be provided in the carrier substrate 210, and the PN junction 280 can be formed based on this semiconductor material.

[0203] In some examples of this embodiment, the PN junction 280 can also be provided on the carrier substrate 210 and arranged in the same layer as the metal conductive layer 220.

[0204] In some examples of this embodiment, the carrier substrate 210 can include a conductive material, and the PN junction 280 can also be provided on the back surface of the carrier substrate 210 and electrically connected to the metal conductive layer 220 through the carrier substrate 210.

[0205] In some examples of this embodiment, the battery connection member 20 can include one or more PN junctions 280.

[0206] In some examples of this embodiment, the battery connector 20 may also include an auxiliary electrode 290, and the PN junction 280 is electrically connected to the electrode 120 in the solar cell 10 through the auxiliary electrode 290. For example, one end of the PN junction 280 is electrically connected to the metal conductive layer 220, the other end of the PN junction 280 is electrically connected to the auxiliary electrode 290, and the auxiliary electrode 290 and the metal conductive layer 220 are respectively electrically connected to two electrodes 120 with opposite polarities in a solar cell 10.

[0207] In some examples of this embodiment, the auxiliary electrode 290 may be connected to only one electrode 120 in the solar cell 10, or may be connected to multiple electrodes 120 at the same time. For example, the auxiliary electrode 290 may be connected to only one positive electrode or one negative electrode in the solar cell 10, or may be connected to multiple positive electrodes or multiple negative electrodes at the same time.

[0208] In some examples of this embodiment, there may be one or more auxiliary electrodes 290.

[0209] In some examples of this embodiment, each solar cell 10 in the solar cell module is connected with a PN junction 280.

[0210] Figure 24 The following is a schematic structural diagram of a battery connector 20 provided by the present disclosure. Refer to Figure 24 As shown, in some examples of this embodiment, in the battery connector 20, the metal conductive layer 220 may include a linear conductive portion 221. Among them, the linear conductive portion 221 may be connected to a group of electrodes 120 in two adjacent solar cells 10 to make the two solar cells 10 conduct.

[0211] Furthermore, the battery connector 20 further includes a PN junction 280 and an auxiliary electrode 290. One end of the PN junction 280 is electrically connected to the metal conductive layer 220, and the other end is electrically connected to the auxiliary electrode 290. Refer to Figure 24 As shown, there may be multiple auxiliary electrodes 290, and each auxiliary electrode 290 may be electrically connected to an electrode 120. It can be understood that Figure 24 The battery connector 20 shown can be regarded as additionally provided with a PN junction 280 and an auxiliary electrode 290 on the basis of the battery connector 20 shown in Figure 6 Therefore, the battery connector 20 can be electrically connected to the solar cell 10 in a manner similar to Figure 6 Furthermore, the PN junction 280 may be disposed in the carrier substrate 210 and formed by doping based on the carrier substrate 210.

[0212] Figure 25 For the battery connector 20 including Figure 24 and as shown in Figure 12Schematic structural diagram of a solar cell module with solar cell chips 10. For ease of understanding, Figure 25 the carrier substrate 210 in the battery connector 20 is omitted in Figure 25 to expose the position of the metal conductive layer 220 therein. Referring to Figure 25 as shown, in some examples of this embodiment, in the solar cell module, the juxtaposition direction of multiple solar cell chips 10 is the same as the extension direction of the first electrode 121 and the second electrode 122. The first electrode 121 of a first solar cell chip 10 and the second electrode 122 of a second solar cell chip 10 form a set of electrodes 120. The battery connector 20 includes multiple linear conductive parts 221, and each linear conductive part 221 straddles two adjacent solar cell chips 10, and each linear conductive part 221 is electrically connected to a set of electrodes 120.

[0213] In some examples of this embodiment, in two adjacent solar cell chips 10, the two electrodes 120 in an electrode set extend in the same direction. The metal conductive layer 220 includes a linear conductive part 221, and the extension direction of the linear conductive part 221 is the same as the extension direction of the two electrodes 120 in the electrode set.

[0214] For ease of description, referring to Figure 25 as shown, in two adjacent solar cell chips 10, the first solar cell chip 10 is the first cell chip 11, the second solar cell chip 10 is the second cell chip 12, the first electrode 121 and the second electrode 122 in the first cell chip 11 are respectively the first positive electrode 1211 and the first negative electrode 1221, and the first electrode 121 and the second electrode 122 in the second cell chip 12 are respectively the second positive electrode 1212 and the second negative electrode 1222. The metal conductive layer 220 is electrically connected to the first positive electrode 1211 and the second negative electrode 1222, and correspondingly, the auxiliary electrode 290 is electrically connected to the second positive electrode 1212. It can be understood that the P end of the PN junction 280 is electrically connected to the second negative electrode 1222 by connecting to the metal conductive layer 220, and the N end is electrically connected to the second positive electrode 1212 by connecting to the auxiliary electrode 290, which makes the PN junction 280 reverse-biased with respect to the second cell chip 12.

[0215] Figure 26 Schematic structural diagram of a battery connector 20 provided by the present disclosure. Referring to Figure 26 as shown, the metal conductive layer 220 in this battery connector 20 includes a linear conductive part 221. Further, this battery connector 20 further includes a first connection section 251 and a second connection section 252 located on the carrier substrate 210, and the first connection section 251 and the second connection section 252 are arranged at intervals. It can be understood that Figure 26 the battery connector 20 shown in Figure 8On the basis of the battery connector 20 shown, a PN junction 280 is additionally provided. Moreover, the first connection section 251 and / or the second connection section 252 can serve as an auxiliary electrode 290. The two ends of the PN junction 280 are electrically connected to the linear conductive part 221 and the first connection section 251 respectively. Therefore, the battery connector 20 can be electrically connected to the solar cell 10 in a manner similar to Figure 8 shown.

[0216] Figure 27 It includes, for example, Figure 12 the solar cell 10 shown and Figure 26 the battery connector 20 shown. It is a schematic structural view of a solar cell module. For ease of understanding, Figure 27 the carrier substrate 210 in the battery connector 20 is omitted in Figure 27 to expose the position of the metal conductive layer 220 therein. Referring to Figure 27 shown, in some examples of this embodiment, in the solar cell module, the juxtaposition direction of multiple solar cells 10 is the same as the extension direction of the first electrode 121 and the second electrode 122. The solar cell module includes more than three battery connectors 20, and each battery connector 20 straddles two adjacent solar cells 10.

[0217] Referring to Figure 27 shown, the linear conductive part 221 in each battery connector 20 can straddle two adjacent solar cells 10 and be connected to the first electrode 121 in one solar cell 10 and the second electrode 122 in the other solar cell 10. The first connection section 251 and the second connection section 252 in each battery connector 20 are respectively arranged on two solar cells 10. Among three consecutive battery connectors 20, the two ends of the linear conductive part 221 in the middle battery connector 20 respectively contact the first connection section 251 in the front-side battery connector 20 and the second connection section 252 in the rear-side battery connector 20.

[0218] Specifically, reference can be made to Figure 27As shown, among two adjacent solar cells 10, the first solar cell 10 is the first cell 11, and the second solar cell 10 is the second cell 12. The first electrode 121 and the second electrode 122 in the first cell 11 are the first positive electrode 1211 and the first negative electrode 1221 respectively, and the first electrode 121 and the second electrode 122 in the second cell 12 are the second positive electrode 1212 and the second negative electrode 1222 respectively. Three consecutive cell connectors 20 include an intermediate connector 21, a front-side connector 22, and a rear-side connector 23. The front-side connector 22 and the rear-side connector 23 are respectively arranged on both sides of the intermediate connector 21. The intermediate connector 21 straddles the first cell 11 and the second cell 12. The linear conductive part 221, the first connection segment 251, and the second connection segment 252 in the intermediate connector 21 are the intermediate conductive part 2211, the intermediate first connection segment 2511, and the intermediate second connection segment 2521 respectively. The linear conductive part 221, the first connection segment 251, and the second connection segment 252 in the front-side connector 22 are the front-side linear conductive part 221, the front-side first connection segment 251, and the front-side second connection segment 2522 respectively. The linear conductive part 221, the first connection segment 251, and the second connection segment 252 in the rear-side connector 23 are the rear-side linear conductive part 221, the rear-side first connection segment 2513, and the rear-side second connection segment 252 respectively.

[0219] Referring to Figure 27 As shown, both ends of the intermediate conductive part 2211 are respectively connected to the front-side first connection segment 251 and the rear-side second connection segment 252. The intermediate second connection segment 2521 is connected to the front-side linear conductive part 221, and the intermediate first connection segment 2511 is connected to the rear-side linear conductive part 221.

[0220] The connection mode of the PN junction 280 should be determined by the electrodes 120 actually connected by the linear conductive part 221, the first connection segment 251, and the second connection segment 252. For example, in the case of the intermediate connector 21, the intermediate conductive part 2211 is arranged on the first positive electrode 1211 and the second negative electrode 1222. A PN junction 280 is arranged between the intermediate conductive part 2211 and the intermediate first connection segment 2511. Since the intermediate first connection segment 2511 is connected to the second positive electrode 1212, the N end of the PN junction 280 is connected to the intermediate first connection segment 2511, and the P end of the PN junction 280 is connected to the intermediate conductive part 2211.

[0221] Figure 28 This is a schematic structural diagram of a cell connector 20 provided by the present disclosure. Referring to Figure 28As shown, in some examples of this embodiment, in the battery connector 20, the metal conductive layer 220 may include a sheet-shaped conductive portion 222. The sheet-shaped conductive portion 222 is disposed on a surface of the carrier substrate 210 close to the solar cell 10, and the sheet-shaped conductive portion 222 may cover a partial surface of the carrier substrate 210. Further, the battery connector 20 further includes a PN junction 280 and an auxiliary electrode 290. One end of the PN junction 280 is electrically connected to the metal conductive layer 220, and the other end is electrically connected to the auxiliary electrode 290. Refer to Figure 28 As shown, there may be a plurality of auxiliary electrodes 290, and the plurality of auxiliary electrodes 290 may be respectively electrically connected to the corresponding plurality of electrodes 120. It can be understood that Figure 28 The battery connector 20 shown can be regarded as having a PN junction 280 and an auxiliary electrode 290 provided on the basis of the structure of the battery connector 20 shown in Figure 11 Therefore, the battery connector 20 can be electrically connected to the solar cell 10 in a manner similar to Figure 11 shown.

[0222] Figure 29 is a schematic structural diagram of a solar cell module including the battery connector 20 including Figure 28 and the solar cell 10 including Figure 19 For ease of understanding, Figure 29 the carrier substrate 210 in the battery connector 20 is omitted in Figure 29 to expose the position of the metal conductive layer 220 therein. Refer to Figure 21 As shown, in this solar cell module, the juxtaposed direction of the plurality of solar cells 10 may be the same as the extending direction of the first electrode 121 and the second electrode 122. Refer to Figure 21 As shown, the sheet-shaped conductive portion 222 in the battery connector 20 is disposed on the first connection region 111 in the first solar cell 10 and is connected to the plurality of first electrodes 121. Moreover, the sheet-shaped conductive portion 222 in the battery connector 20 is further disposed on the second connection region 112 in the second solar cell 10 and is connected to the plurality of second electrodes 122, so that the first solar cell 10 and the second solar cell 10 are connected in series. It can be understood that the sheet-shaped conductive portion 222 can be electrically connected to multiple sets of electrodes 120.

[0223] For ease of description, refer to Figure 21As shown, among two adjacent solar cells 10, the first solar cell 10 is the first cell 11, and the second solar cell 10 is the second cell 12. The first electrode 121 and the second electrode 122 in the first cell 11 are the first positive electrode 1211 and the first negative electrode 1221 respectively. The first connection region 111 and the second connection region 112 in the first cell 11 are the first positive electrode connection region 1111 and the first negative electrode connection region 1121 respectively. The first electrode 121 and the second electrode 122 in the second cell 12 are the second positive electrode 1212 and the second negative electrode 1222 respectively. The first connection region 111 and the second connection region 112 in the second cell 12 are the second positive electrode connection region 1112 and the second negative electrode connection region 1122 respectively. The first positive electrode connection region 1111 and the second negative electrode connection region 1122 are adjacent. The sheet-shaped conductive part 222 is disposed on the first positive electrode connection region 1111 and the second negative electrode connection region 1122 and is connected to a plurality of first positive electrodes 1211 and a plurality of second negative electrodes 1222. There can be a plurality of auxiliary electrodes 290, and the plurality of auxiliary electrodes 290 are respectively electrically connected to a plurality of second positive electrodes 1212. It can be understood that the P end of the PN junction 280 is electrically connected to the second negative electrode 1222 by being connected to the sheet-shaped conductive part 222, and the N end is electrically connected to the second positive electrode 1212 by being connected to the auxiliary electrode 290, which makes the PN junction 280 reverse-biased with respect to the second cell 12.

[0224] Furthermore, the present disclosure also provides a photovoltaic module. Figure 30 It is a schematic cross-sectional structure diagram of the photovoltaic module. Refer to Figure 30 As shown, in this embodiment, the photovoltaic module includes a first support plate 410, a second support plate 420, and a solar cell assembly as described in any of the above embodiments. The solar cell assembly is disposed between the first support plate 410 and the second support plate 420.

[0225] In some examples of this embodiment, the electrode 120 in the solar cell 10 is located on the back surface of the solar cell 10, and the battery connector 20 can be disposed on the back surface of the solar cell 10.

[0226] Refer to Figure 30 As shown, in some examples of this embodiment, the photovoltaic module may further include a first adhesion layer 430. The first adhesion layer 430 can be used for the carrier substrate 210 to adhere to. Further, the first adhesion layer 430 can be disposed between the carrier substrate 210 and the first support plate 410.

[0227] Refer to Figure 30As shown, in some examples of this embodiment, the photovoltaic module may further include a second adhering layer 440. The second adhering layer 440 can be used for the solar cell 10 to adhere to. Further, the second adhering layer 440 can be disposed between the solar cell 10 and the second support plate 420.

[0228] Referring to Figure 30 As shown, in some examples of this embodiment, the photovoltaic module may further include a frame 450. The frame 450 can sandwich the first support plate 410 and the second support plate 420 from the sides, and the frame 450 is used to fix the first support plate 410 and the second support plate 420.

[0229] In some examples of this embodiment, the light transmittance of the first adhering layer 430 can be above 90%.

[0230] In some examples of this embodiment, the refractive index of the first adhering layer 430 is 1.3 - 2.

[0231] In some examples of this embodiment, the material of the first adhering layer 430 may include a polymer. The polymer may include, but is not limited to, one or more of ethylene - vinyl acetate copolymer (EVA), thermoplastic elastomer (POE), silicone compound, and polyvinyl butyral.

[0232] In some examples of this embodiment, the light transmittance of the second adhering layer 440 can be above 90%.

[0233] In some examples of this embodiment, the refractive index of the second adhering layer 440 is 1.3 - 2.

[0234] In some examples of this embodiment, the material of the second adhering layer 440 may include a polymer. The polymer may include, but is not limited to, one or more of ethylene - vinyl acetate copolymer (EVA), thermoplastic elastomer (POE), silicone compound, and polyvinyl butyral.

[0235] In some examples of this embodiment, the light transmittance of the first support plate 410 can be above 90%.

[0236] In some examples of this embodiment, the refractive index of the first support plate 410 is 1.3 - 2.

[0237] In some examples of this embodiment, the material of the first support plate 410 may include, but is not limited to, one or more of glass, polyethylene terephthalate, ethylene - tetrafluoroethylene copolymer, polytetrafluoroethylene, polyvinylidene fluoride, and glass fiber polymer composite material.

[0238] In some examples of this embodiment, the light transmittance of the second support plate 420 can be above 90%.

[0239] In some examples of this embodiment, the refractive index of the second support plate 420 is 1.3 to 2.

[0240] In some examples of this embodiment, the material of the second support plate 420 may include, but is not limited to, one or more of glass, polyethylene terephthalate, ethylene-tetrafluoroethylene copolymer, polytetrafluoroethylene, polyvinylidene fluoride, and glass fiber polymer composite.

[0241] In some examples of this embodiment, the material of the frame 450 may include, but is not limited to, one or more of aluminum, iron, and resin glass fiber composite.

[0242] In some examples of this embodiment, the frame 450 and the first support plate 410 and / or the second support plate 420 may be bonded through an adhesive material, and the adhesive material may include, but is not limited to, one or more of silicone and foam tape.

[0243] Further, the present disclosure also provides a method for manufacturing a photovoltaic module. The method for manufacturing the photovoltaic module includes the following steps: connecting the battery connectors 20 in alignment to a plurality of solar cells 10 to form a solar cell assembly; and respectively disposing the first support plate 410 and the second support plate 420 on both sides of the solar cell assembly.

[0244] In some examples of this embodiment, the step of connecting the battery connectors 20 in alignment to a plurality of solar cells 10 includes:

[0245] Attaching the carrier substrate 210 in the battery connector 20 to the first attachment layer 430, and connecting the solar cell 10 in alignment to the metal conductive layer 220; or,

[0246] Attaching the solar cell 10 to the second attachment layer 440, and connecting the battery connector 20 in alignment to the electrode 120 in the solar cell 10.

[0247] In some embodiments of the present disclosure, a method for manufacturing a photovoltaic module may include the following steps:

[0248] Providing battery connectors 20 and a plurality of solar cells 10, connecting the battery connectors 20 in alignment to the solar cells 10 so that two adjacent solar cells 10 are electrically connected through the metal conductive layer 220 in the battery connector 20 to form a solar cell assembly. In some examples of this embodiment, there may be one or more battery connectors 20.

[0249] Then, the second attaching layer 440 is attached to the second support plate 420, and the solar cell module is attached to the second attaching layer 440. In some examples of this embodiment, the side of the solar cell 10 away from the battery connector 20 is attached to the second attaching layer 440.

[0250] Then, the first attaching layer 430 is attached to the solar cell module, and the side of the battery connector 20 away from the solar cell 10 is attached to the first attaching layer 430.

[0251] Then, the first support plate 410 is disposed on the side of the first attaching layer 430 away from the solar cell module.

[0252] In some examples of this embodiment, it may further include a step of laminating the first support plate 410, the second support plate 420, and the solar cell module.

[0253] In some examples of this embodiment, it may further include a step of clamping and fixing the first support plate 410 and the second support plate 420 from the sides by using a frame 450.

[0254] In some embodiments of the present disclosure, a method for preparing a photovoltaic module may include the following steps:

[0255] Provide a battery connector 20, and attach the carrier substrate 210 of the battery connector 20 to the first attaching layer 430. In some examples of this embodiment, there may be multiple battery connectors 20. It can be understood that for the case where there are multiple battery connectors 20, pre-attaching the battery connectors 20 to the first attaching layer 430 can improve the alignment accuracy between the battery connectors 20 and the solar cells 10 while simplifying the operation process.

[0256] However, the side of the first attaching layer 430 away from the battery connector 20 is attached to the first support plate 410. Using a support plate to fix the first attaching layer 430 and the battery connector 20 can improve the alignment accuracy between the solar cell 10 and the battery connector 20.

[0257] Then, a plurality of solar cells 10 are aligned and connected to the first attaching layer 430 to form a solar cell module.

[0258] Then, the second attaching layer 440 is attached to the solar cell module, and the side of the solar cell 10 away from the battery connector 20 is attached to the second attaching layer 440.

[0259] Then, the second support plate 420 is disposed on the side of the second attaching layer 440 away from the solar cell module.

[0260] In some examples of this embodiment, it may further include a step of laminating the first support plate 410, the second support plate 420, and the solar cell assembly.

[0261] In some examples of this embodiment, it may further include a step of clamping and fixing the first support plate 410 and the second support plate 420 from the side with a frame 450.

[0262] In some embodiments of the present disclosure, a method for manufacturing a photovoltaic module may include the following steps:

[0263] Provide a battery connector 20, and attach the bearing base 210 of the battery connector 20 to the first attachment layer 430. In some examples of this embodiment, there may be multiple battery connectors 20. It can be understood that for the case where there are multiple battery connectors 20, pre-attaching the battery connectors 20 to the first attachment layer 430 can simplify the operation process while improving the alignment accuracy between the battery connectors 20 and the solar cells 10.

[0264] However, the side of the first attachment layer 430 away from the battery connector 20 is attached to the first support plate 410. Using the support plate to fix the first attachment layer 430 and the battery connector 20 can improve the alignment accuracy between the solar cells 10 and the battery connectors 20.

[0265] Then, align and connect multiple solar cells 10 to the first attachment layer 430 to form a solar cell assembly.

[0266] Then, attach the second attachment layer 440 to the solar cell assembly, and the side of the solar cell 10 away from the battery connector 20 is attached to the second attachment layer 440.

[0267] Then, arrange the second support plate 420 on the side of the second attachment layer 440 away from the solar cell assembly.

[0268] In some examples of this embodiment, it may further include a step of laminating the first support plate 410, the second support plate 420, and the solar cell assembly.

[0269] In some examples of this embodiment, it may further include a step of clamping and fixing the first support plate 410 and the second support plate 420 from the side with a frame 450.

[0270] Through the above steps, the photovoltaic module in the present disclosure can be manufactured.

[0271] Please note that the above embodiments are for illustrative purposes only and do not imply any limitation to the present disclosure.

[0272] It should be understood that, unless otherwise explicitly stated herein, there is no strict order restriction for the execution of steps, and these steps can be executed in other orders. Moreover, at least some of the steps in the preparation process may include multiple sub-steps or multiple stages. These sub-steps or stages do not necessarily need to be completed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be executed alternately or in turn with at least some of the sub-steps or stages of other steps or other steps.

[0273] Each embodiment in this specification is described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the embodiments, reference can be made to each other.

[0274] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

Claims

1. A solar cell module, characterized in that, it includes a battery connector (20) and a plurality of solar cells (10). The battery connector (20) includes a carrier substrate (210) and a metal conductive layer (220) laminated on the carrier substrate (210). Two adjacent solar cells (10) are electrically connected through the metal conductive layer (220) in the battery connector (20), and the metal conductive layer (220) is disposed between the solar cell (10) and the carrier substrate (210).

2. The solar cell module according to claim 1, characterized in that, the difference in the coefficient of thermal expansion between the carrier substrate (210) and the solar cell (10) is less than the difference in the coefficient of thermal expansion between the metal conductive layer (220) and the solar cell (10).

3. The solar cell module according to claim 1, characterized in that, the hardness of the carrier substrate (210) is greater than the hardness of the metal conductive layer (220).

4. The solar cell module according to claim 1, characterized in that, the material of the carrier substrate (210) includes one or more of silicon, silicon nitride, silicon carbide, gallium arsenide, conductive metal oxide, quartz, glass, ceramic and sapphire.

5. The solar cell module according to claim 4, characterized in that, the material of the metal conductive layer (220) includes one or more of silver, copper, aluminum, tin and lead.

6. The solar cell module according to claim 4, characterized in that, the carrier substrate (210) includes silicon, and the mass content of silicon in the carrier substrate (210) is more than 70%.

7. The solar cell module according to any one of claims 1 to 6, characterized in that, the thickness of the carrier substrate (210) is greater than the thickness of the metal conductive layer (220).

8. The solar cell module according to claim 7, characterized in that, the thickness of the carrier substrate (210) is 50 μm to 300 μm; and / or, the thickness of the metal conductive layer (220) is 1 μm to 50 μm.

9. The solar cell module according to any one of claims 1 to 6, characterized in that, the battery connector (20) further includes a spacer layer (230) disposed between the carrier substrate (210) and the metal conductive layer (220).

10. The solar cell module according to any one of claims 1 to 6, characterized in that, the carrier substrate (210) is a semiconductor, and the battery connector (20) further includes a conductive enhancement layer (240) disposed on the side of the carrier substrate (210) away from the metal conductive layer (220).

11. The solar cell module according to any one of claims 1 to 6, characterized in that, The solar cell (10) includes a cell substrate (110) and electrodes (120) disposed on the cell substrate (110). The solar cell module further includes an adhesive layer (320). The adhesive layer (320) is disposed between the cell substrate (110) and the carrier substrate (210), and the adhesive layer (320) is disposed on the side of the electrodes (120). The carrier substrate (210) is adhered to the cell substrate (110) through the adhesive layer (320).

12. The solar cell module according to claim 11, wherein, the material of the adhesive layer (320) is selected from heat shrinkable materials.

13. The solar cell module according to any one of claims 1 to 6 and 11, wherein, the metal conductive layer (220) is welded to the electrodes (120) in the solar cell (10); or, the solar cell module further includes a conductive adhesion layer (310). The conductive adhesion layer (310) is disposed between the metal conductive layer (220) and the electrodes (120) in the solar cell (10), and the metal conductive layer (220) is electrically connected to the electrodes (120) through the conductive adhesion layer (310).

14. The solar cell module according to any one of claims 1 to 6 and 11, wherein, the solar cell (10) includes a cell substrate (110) and a plurality of electrodes (120) disposed on the back surface of the cell substrate (110). The plurality of electrodes (120) include a first electrode (121) and a second electrode (122) with opposite polarities. Among two adjacent solar cells (10), the first electrode (121) on one of the solar cells (10) and the second electrode (122) on the other solar cell (10) form an electrode (120) group. The first electrode (121) and the second electrode (122) in the electrode (120) group are electrically connected through the cell connector (20).

15. The solar cell module according to claim 14, wherein, the metal conductive layer (220) includes a linear conductive portion (221), and the linear conductive portion (221) is connected to one electrode (120) group.

16. The solar cell module according to claim 15, wherein, the plurality of solar cells (10) are arranged in parallel along the extending direction of the electrodes (120), and the extending direction of the linear conductive portion (221) is the same as the extending direction of the electrodes (120).

17. The solar cell module according to claim 16, wherein, The linear conductive part (221) covers a part of the first electrode (121) and a part of the second electrode (122). The battery connection member (20) further includes a first connection section (251) and a second connection section (252) located on the carrier substrate (210). The first connection section (251) and the second connection section (252) are arranged at intervals. The solar cell module includes three or more battery connection members (20). Among the three consecutive battery connection members (20), both ends of the linear conductive part (221) in the middle battery connection member (20) are respectively in contact with the first connection section (251) in the front-side battery connection member (20) and the second connection section (252) in the rear-side battery connection member (20).

18. The solar cell module according to any one of claims 15 to 17, characterized in that the solar cell (10) further includes an electrode contact pad, and the electrode contact pad is arranged on the electrode (120) and connected to the electrode (120). The battery connection member (20) further includes a conductive connection pad (260) corresponding to the electrode (120) contact pad. The conductive connection pad (260) is arranged on the linear conductive part (221) and connected to the linear conductive part (221). The conductive connection pad (260) is in contact with the corresponding electrode (120) contact pad.

19. The solar cell module according to any one of claims 15 to 17, characterized in that a plurality of the electrodes (120) are main grid electrodes (120), and the solar cell (10) further includes fine grid electrodes (120) connected to the main grid electrodes (120). The battery connection member (20) further includes conductive branch lines (270) corresponding to the fine grid electrodes (120). The conductive branch lines (270) are connected to the linear conductive part (221), and the conductive branch lines (270) are in contact with the fine grid electrodes (120).

20. The solar cell module according to claim 14, characterized in that a plurality of electrode groups are included in two adjacent solar cells (10). The metal conductive layer (220) includes a sheet-shaped conductive part (222), and the sheet-shaped conductive part (222) is connected to the plurality of electrode groups.

21. The solar cell module according to claim 20, characterized in that a plurality of the solar cells (10) are arranged in parallel in a direction intersecting with the extending direction of the electrode (120), and the extending direction of the sheet-shaped conductive part (222) intersects with the extending direction of the electrode (120). The solar cell module further includes a first spacer protruding from the surface of the first electrode (121) and a second spacer protruding from the surface of the second electrode (122). The sheet-shaped conductive portion (222) is spaced apart from the first electrode (121) and the second electrode (122). Among two adjacent solar cells (10), the sheet-shaped conductive portion (222) is connected to the first spacer located on one of the solar cells (10) and the second spacer located on the other solar cell (10).

22. The solar cell module according to claim 20, wherein, the battery substrate (110) has a first connection region (111) and a second connection region (112) which are spaced apart. One end of the first electrode (121) is located in the first connection region (111), and the first electrode (121) is spaced apart from the second connection region (112). One end of the second electrode (122) is located in the second connection region (112), and the second electrode (122) is spaced apart from the first connection region (111); the sheet-shaped conductive portion (222) straddles adjacent solar cells (10). The sheet-shaped conductive portion (222) is disposed on the first connection region (111) in the first solar cell (10) and is connected to the first electrode (121) therein. The sheet-shaped conductive portion (222) is also disposed on the second connection region (112) in the second solar cell (10) and is connected to the second electrode (122) therein.

23. The solar cell module according to any one of claims 1 to 6, 15 to 18, and 21 to 22, wherein, the battery connector (20) further includes a PN junction (280). Both ends of the PN junction (280) are respectively connected to the positive electrode and the negative electrode in one solar cell (10), and the P end of the PN junction (280) is electrically connected to the negative electrode, and the N end of the PN junction (280) is electrically connected to the positive electrode.

24. The solar cell module according to claim 23, wherein, one end of the PN junction (280) is electrically connected to the metal conductive layer (220), and the PN junction (280) is electrically connected to the electrode (120) of the solar cell (10) through the metal conductive layer (220).

25. The solar cell module according to claim 24, wherein, the battery connector (20) further includes an auxiliary electrode (290). The PN junction (280) is electrically connected to the electrode (120) in the solar cell (10) through the auxiliary electrode (290).

26. The solar cell module according to any one of claims 23 to 25, wherein, the carrier substrate (210) is a semiconductor, the PN junction (280) is disposed in the carrier substrate (210), and the PN junction (280) is formed by doping based on the carrier substrate (210).

27. A photovoltaic module, characterized in that, it includes a first support plate (410), a second support plate (420) and the solar cell module according to any one of claims 1 to 26, and the solar cell module is disposed between the first support plate (410) and the second support plate (420).

28. A method for manufacturing the photovoltaic module according to claim 27, characterized in that, it includes the following steps: Aligning and connecting the battery connectors (20) to a plurality of the solar cells (10) to form the solar cell module; and, Respectively disposing the first support plate (410) and the second support plate (420) on both sides of the solar cell module.

29. According to the method for manufacturing the photovoltaic module according to claim 28, characterized in that, the step of aligning and connecting the battery connectors (20) to a plurality of the solar cells (10) includes: Attaching the carrier substrate (210) in the battery connectors (20) to the first attachment layer (430), and aligning and connecting the solar cells (10) to the metal conductive layer (220); or, Attaching the solar cells (10) to the second attachment layer (440), and aligning and connecting the battery connectors (20) to the electrodes (120) in the solar cells (10).

Images