Battery assembly and manufacturing method thereof, power-consuming device, and power generation device

Abstract

The present application discloses a battery assembly and a manufacturing method thereof, an electrical device, and a power generation device, wherein the battery assembly includes: a first substrate, a second substrate, a first battery located between the first substrate and the second substrate, and a second battery located between the first battery and the second substrate; the second substrate has at least one through hole penetrating the second substrate; a plurality of first bus bars electrically connected to the first battery and a plurality of second bus bars electrically connected to the second battery, located between the first substrate and the second substrate; a plurality of first lead wires, one end of the first lead wire is connected to the first bus bar; at least one second lead wire, one end of the second lead wire is connected to the second bus bar, and the other end is led out from the through hole; wherein the other end of the at least one first lead wire is connected to the second bus bar; and / or the other end of the at least one first lead wire is led out from the through hole, and the other end of the first lead wire and the other end of the at least one second lead wire are led out from the same through hole.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to battery components and manufacturing methods thereof, power-consuming devices, and power-generating devices. Background Art

[0002] Since the photoelectric conversion efficiency of crystalline silicon solar cell modules is limited, in order to make full use of the spectrum and energy conversion and break through the photoelectric conversion efficiency, perovskite solar cells can be superimposed on the top layer of crystalline silicon solar cells to form a crystalline silicon-perovskite stacked cell, and the crystalline silicon-perovskite cell stacked cell can be encapsulated between the front glass and the back glass to form a stacked cell module, thereby improving the efficiency of the cell module.

[0003] However, current crystalline silicon-perovskite cell stack modules usually require additional holes to be drilled in the back glass to lead the busbars electrically connected to the perovskite solar cells out of the module. This increases the number of holes in the back glass and reduces the mechanical properties of the module. Summary of the Invention

[0004] In order to solve the above technical problems, the present application provides a battery assembly to reduce the number of holes punched in the second substrate and improve the mechanical properties of the battery assembly.

[0005] This application is implemented through the following technical solutions.

[0006] A first aspect of the present application provides a battery assembly, comprising: a first substrate, a second substrate located on the first substrate, a first battery located between the first substrate and the second substrate, and a second battery located between the first battery and the second substrate; the second substrate having at least one through-hole extending through the second substrate; a plurality of first bus bars electrically connected to the first battery and a plurality of second bus bars electrically connected to the second battery, located between the first substrate and the second substrate; a plurality of first lead wires, one end of the first lead wire being connected to the first bus bar; at least one second lead wire, one end of the second lead wire being connected to the second bus bar, and the other end being led out from the through-hole; wherein the other end of the at least one first lead wire is connected to the second bus bar; and / or the other end of the at least one first lead wire is led out from the through-hole, and the other end of the first lead wire and the other end of the at least one second lead wire are led out from the same through-hole.

[0007] In this technical solution, the battery assembly is a stacked battery assembly consisting of a first battery and a second battery, and a first bus bar electrically connected to the first battery and a second bus bar electrically connected to the second battery are located inside the space formed by the first substrate and the second substrate, wherein at least one first bus bar and the second bus bar are electrically connected inside the battery assembly through a first lead wire. In this way, for the first bus bar electrically connected to the second bus bar, there is no need to additionally set a lead wire that needs to be led out of the assembly to be connected separately, so there is no need to punch additional holes on the second substrate; and / or, the other end of at least one first lead wire connected to the first bus bar and the other end of at least one second lead wire are led out from the same through hole, so there is no need to punch additional holes on the second substrate to lead out the first lead wire separately, thereby improving the mechanical properties of the battery assembly and simplifying the manufacturing process of the battery assembly, which is conducive to the rapid mass production of stacked battery assemblies.

[0008] In any embodiment, at least one second bus bar is disposed on at least one side of the second battery along a first direction parallel to the plane of the first substrate; or,

[0009] The second battery includes a first battery group and a second battery group arranged in a first direction parallel to the plane of the first substrate, and at least one second bus bar is located between the first battery group and the second battery group;

[0010] The battery assembly further includes a first sealing layer located on a side of the second battery and the second bus bar facing the first battery and covering at least a portion of the first battery.

[0011] In this way, the first sealing layer plays a role in electrically isolating the first battery and the second battery.

[0012] In any embodiment, the first sealing layer has at least one opening extending through the first sealing layer; wherein,

[0013] One end of at least one first lead wire is connected to the first bus bar, and the other end is led out from the opening and connected to the second bus bar, so that at least one first bus bar and the second bus bar are interconnected inside the battery assembly; and / or,

[0014] One end of at least one first lead wire is connected to the first bus bar, and the other end is led out from the opening and the through hole, so that at least one first bus bar and the second bus bar are independently arranged inside the battery assembly.

[0015] In any embodiment, at least one first lead includes a first subsection, which is located on a side of the first sealing layer facing the first substrate and connected to the first bus bar, and partially covers the first battery cell. The battery assembly also includes a first insulating layer, which is located on a side of the first subsection facing the first battery cell and covers at least the portion of the first battery cell covered by the first subsection. The first insulating layer is used to separate the first lead from the first battery cell to prevent the risk of short circuit.

[0016] In any embodiment, a plurality of second bus bars extend along a second direction and are spaced apart along the second direction. An opening is located between two adjacent second bus bars. The ends of the two adjacent second bus bars near the opening are connected to a second lead wire. The other end of the second lead wire extending from the opening and the other end of the first lead wire connected to the end of the second bus bar near the opening are led out of the same through-hole. The second direction intersects the first direction and is parallel to the plane of the first substrate. In this way, the first lead wire and the two adjacent second lead wires are led out of the same through-hole, further reducing the number of holes punched in the second substrate and simplifying the battery assembly manufacturing process.

[0017] In any embodiment, in the second direction, at least one side edge of the first sealing layer has a notch, exposing at least a portion of the first busbar. At least one first lead wire is located on a surface of the first sealing layer facing away from the first battery cell, with one end connected to the first busbar exposed by the notch and the other end connected to the second busbar. The second direction intersects the first direction and is parallel to the plane of the first substrate. This eliminates the need to form an opening in the first sealing layer, eliminating the need to insert the first lead wire through the opening. Furthermore, the first lead wire is separated from the first battery cell by the first sealing layer, eliminating the need for a first insulating layer, further simplifying the battery assembly manufacturing process.

[0018] In any embodiment, at least one of the first busbars is located along a second direction on at least one side of the first sealing layer and is spaced apart from the first sealing layer, the second direction intersecting the first direction and being parallel to the plane of the first substrate; the battery assembly further comprises: a second insulating layer, the second insulating layer being located between the first busbar and the first sealing layer and covering a portion of the first battery; at least one of the first lead wires is located on a side of the first sealing layer and the second insulating layer facing away from the first battery, one end of the first lead wire being connected to the first busbar located along the second direction on one side of the first sealing layer, and the other end being connected to the second busbar. In this manner, there is no need to form an opening in the first sealing layer, thus eliminating the need to insert the first lead wire through the opening. The first lead wire is separated from the first battery by the first sealing layer and the second insulating layer, thereby avoiding the risk of a short circuit.

[0019] In any embodiment, at least one first busbar is located along the second direction on at least one side of the first sealing layer and contacts the first sealing layer. At least one first lead wire is located on a side of the first sealing layer facing away from the first battery cell, with one end connected to the first busbar located along the second direction on the side of the first sealing layer and the other end connected to the second busbar. The second direction intersects the first direction and is parallel to the plane of the first substrate. This eliminates the need to form an opening in the first sealing layer, omitting the process of inserting the first lead wire through the opening, and eliminating the need for a second insulating layer, further simplifying the battery assembly manufacturing process.

[0020] In any embodiment, a plurality of second bus bars are arranged along the first direction on one side of the second battery and spaced apart along the second direction, with the orthographic projection of the first lead wire on the plane where the second battery is located and the second bus bar being located on the same side of the second battery in the first direction; or, a plurality of second bus bars are arranged between the first battery pack and the second battery pack and spaced apart along the second direction, with the orthographic projection of the first lead wire on the plane where the second battery is located being located between the first battery pack and the second battery pack; the second direction intersects the first direction and is parallel to the plane of the first substrate. In this manner, it is convenient to lead the first lead wire to the vicinity of the second bus bar, thereby facilitating its connection to the second bus bar, or it is convenient to route the first lead wire and the second lead wire connected to the second bus bar through the same through hole, thereby reducing the processing complexity of the first lead wire and simplifying the manufacturing process of the battery assembly.

[0021] In any embodiment, the first cell comprises a thin-film solar cell, the thin-film solar cell includes a light-absorbing layer, and the light-absorbing layer includes one or more of a perovskite light-absorbing layer, an amorphous silicon light-absorbing layer, a copper indium gallium selenide light-absorbing layer, a cadmium telluride light-absorbing layer, a gallium arsenide light-absorbing layer, and an organic dye light-absorbing layer; and / or the second cell comprises a crystalline silicon solar cell. The light-absorbing layer can be used to prepare a thin-film solar cell with a light-absorbing layer thickness on the micrometer or nanometer scale, thereby expanding the application scenarios of the battery assembly.

[0022] A second aspect of the present application further provides a method for manufacturing a battery assembly, comprising:

[0023] Providing a first substrate, forming a first battery on the first substrate, and forming a plurality of first bus bars and a plurality of first lead wires, wherein the first bus bars are electrically connected to the first battery, and one end of the first lead wire is connected to the first bus bar;

[0024] Providing a second battery, placing the second battery on the first battery, and forming a plurality of second bus bars and at least one second lead wire, wherein the second bus bar is electrically connected to the second battery, and one end of the second lead wire is connected to the second bus bar;

[0025] A second substrate is provided, and the second substrate is disposed on the second battery, wherein the second substrate has at least one through hole penetrating the second substrate, and the other end of the second lead wire is led out from the through hole; wherein,

[0026] Before placing the second substrate on the second battery, connecting the other end of at least one first lead wire to the second bus bar; and / or,

[0027] After the second substrate is disposed on the second battery, the other end of the at least one first lead wire is led out from the through hole, and the other end of the first lead wire and the other end of the at least one second lead wire are led out from the same through hole.

[0028] In the technical solution of the present application, at least one first bus bar and a second bus bar are electrically connected inside the battery assembly through a first lead wire. In this way, for the first bus bar electrically connected to the second bus bar, there is no need to additionally set a lead wire that needs to be led out of the assembly to be connected separately, so there is no need to punch additional holes on the second substrate; and / or, the other end of at least one first lead wire connected to the first bus bar and the other end of at least one second lead wire are led out from the same through hole. In this way, there is no need to punch additional holes on the second substrate to lead out the first lead wire separately, thereby improving the mechanical properties of the battery assembly and simplifying the manufacturing process of the battery assembly, which is conducive to the rapid mass production of laminated battery assemblies.

[0029] In any embodiment, at least one second bus bar is disposed on at least one side of the second battery along a first direction parallel to the plane of the first substrate; or,

[0030] The second battery includes a first battery group and a second battery group arranged in a first direction parallel to the plane of the first substrate, and at least one second bus bar is located between the first battery group and the second battery group;

[0031] Before placing the second battery on the first battery, the method further includes forming a first sealing layer, the first sealing layer being located on a side of the second battery and the second bus bar facing the first battery and covering at least a portion of the first battery. Thus, the first sealing layer electrically isolates the first battery from the second battery.

[0032] In any embodiment, the first sealing layer further covers at least a portion of the first lead wire, and an opening penetrating the first sealing layer is formed on the first sealing layer;

[0033] Connecting the other end of at least one first lead wire to the second bus bar, comprising: leading one end of the first lead wire away from the first bus bar out of the opening and connecting it to the second bus bar, thereby interconnecting the at least one first bus bar and the second bus bar within the battery assembly; and / or,

[0034] Leading the other end of at least one first lead wire out of the through hole includes: leading one end of the first lead wire away from the first bus bar out of the opening and the through hole, so that at least one first bus bar and the second bus bar are independently arranged inside the battery assembly.

[0035] In any embodiment, at least one first lead includes a first subsection;

[0036] Before forming the first sealing layer, the method further includes forming a first insulating layer. The first insulating layer is located on a side of the first sub-section facing the first battery and covers at least a portion of the first battery covered by the first sub-section. After the end of the first lead wire, away from the first bus bar, is led out of the opening, the first sub-section and the first insulating layer are located on a side of the first sealing layer facing the first substrate. The first insulating layer is used to separate the first lead wire and the first battery to prevent the risk of a short circuit.

[0037] In any embodiment, a notch is formed along at least one side edge of the first sealing layer in the second direction, exposing at least a portion of the first bus bar through the notch, and one end of at least one first lead wire is connected to the first bus bar exposed by the notch; connecting the other end of the at least one first lead wire to the second bus bar comprises: leading the first lead wire out of the notch, laying it on a surface of the first sealing layer away from the first battery cell, and connecting the end of the first lead wire away from the notch to the second bus bar. This eliminates the need to form an opening in the first sealing layer, omitting the process of inserting the first lead wire through the opening. Furthermore, the first lead wire is separated from the first battery cell by the first sealing layer, eliminating the need for a first insulating layer, further simplifying the manufacturing process of the battery assembly.

[0038] In any embodiment, at least one of the first busbars is located along a second direction on at least one side of the first sealing layer and is spaced apart from the first sealing layer, the second direction intersecting the first direction and being parallel to the plane of the first substrate. The method further includes: forming a second insulating layer, the second insulating layer being located between the first busbar and the first sealing layer and covering a portion of the first battery cell; at least one first lead wire is formed on a side of the first sealing layer and the second insulating layer facing away from the first battery cell, one end of the first lead wire being connected to the first busbar located along the second direction on one side of the first sealing layer, and the other end being connected to the second busbar. In this manner, there is no need to form an opening in the first sealing layer, thus eliminating the need to insert the first lead wire through the opening. The first sealing layer and the second insulating layer serve to separate the first lead wire from the first battery cell, thereby avoiding the risk of a short circuit.

[0039] In any embodiment, at least one first busbar is located along the second direction on at least one side of the first sealing layer and contacts the first sealing layer. At least one first lead wire is formed on the side of the first sealing layer facing away from the first battery cell, with one end connected to the first busbar located along the second direction on the side of the first sealing layer and the other end connected to the second busbar. The second direction intersects the first direction and is parallel to the plane of the first substrate. This eliminates the need to form an opening in the first sealing layer, omitting the process of inserting the first lead wire through the opening. Furthermore, the first lead wire is separated from the first battery cell by the first sealing layer, eliminating the need for an additional second insulating layer, further simplifying the battery assembly manufacturing process.

[0040] The third aspect of the present application further provides an electrical device, which includes the battery assembly of the first aspect of the present application.

[0041] The fourth aspect of the present application also provides a power generation device, which includes the battery assembly of the first aspect of the present application.

[0042] The details of one or more embodiments of the present disclosure are set forth in the accompanying drawings and the description below. Other features and advantages of the present disclosure will become apparent from the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0044] Figure 1 A schematic block diagram of an electrical device provided in some embodiments of the present application;

[0045] Figure 2 A schematic block diagram of a power generation device provided in some embodiments of the present application;

[0046] Figure 3 A schematic top view of a battery assembly provided in some embodiments of the present application;

[0047] Figure 4 for Figure 3 Enlarged view of the middle Q region;

[0048] Figure 5 For the Figure 3 A schematic diagram of the cross-sectional structure taken along the line connecting A and A';

[0049] Figure 6 For the Figure 3 Schematic diagram of the cross-sectional structure taken along line BB';

[0050] Figure 7 for Figure 3 A schematic top view of the first battery;

[0051] Figure 8 for Figure 7 Schematic diagram of the structure of the first sub-battery;

[0052] Figure 9 for Figure 3 A schematic top view of the second battery;

[0053] Figure 10 for Figure 3 Circuit schematic diagram of the battery assembly;

[0054] Figure 11 A schematic top view of a battery assembly provided in some other embodiments of the present application;

[0055] Figure 12 for Figure 11 Enlarged view of the middle Q region;

[0056] Figure 13 For the Figure 11 A schematic diagram of the cross-sectional structure taken along the line connecting A and A';

[0057] Figure 14 for Figure 11 Circuit schematic diagram of the battery assembly;

[0058] Figure 15 A schematic top view of a battery assembly provided in some other embodiments of the present application;

[0059] Figure 16 for Figure 15 Enlarged view of the middle Q region;

[0060] Figure 17 For the Figure 15 A schematic diagram of the cross-sectional structure taken along the line connecting A and A';

[0061] Figure 18 A schematic top view of a battery assembly provided in some further embodiments of the present application;

[0062] Figure 19 for Figure 18 Enlarged view of the middle Q region;

[0063] Figure 20 For the Figure 18 A schematic diagram of the cross-sectional structure taken along the line connecting A and A';

[0064] Figure 21 A schematic top view of a battery assembly provided in some other embodiments of the present application;

[0065] Figure 22 for Figure 21 Enlarged view of the middle Q region;

[0066] Figure 23 For the Figure 21 A schematic diagram of the cross-sectional structure taken along the line connecting A and A';

[0067] Figure 24 A schematic top view of a battery assembly provided in some other embodiments of the present application;

[0068] Figure 25 and Figure 26 for Figure 24 Different examples of schematic top views of the first battery;

[0069] Figure 27 for Figure 24 A schematic top view of the second battery;

[0070] Figure 28 A flowchart of a method for manufacturing a battery assembly according to some embodiments of the present application;

[0071] Figure 29 Schematic diagram of the structure of the battery assembly during the manufacturing process provided in some embodiments of the present application Figure 1 ;

[0072] Figure 30 Schematic diagram of the structure of the battery assembly during the manufacturing process provided in some embodiments of the present application Figure 2 ;

[0073] Figure 31 Schematic diagram of the structure of the battery assembly during the manufacturing process provided in some embodiments of the present application Figure 3 ;

[0074] Figure 32 Schematic diagram of the structure of the battery assembly during the manufacturing process provided in some embodiments of the present application Figure 4 ;

[0075] Figure 33 Schematic diagram of the structure of the battery assembly during the manufacturing process provided in some embodiments of the present application Figure 5 ;

[0076] Figure 34 Schematic diagram of the structure of the battery assembly during the manufacturing process provided in some embodiments of the present application Figure 6 ;

[0077] Figure 35 Schematic diagram of the structure of the battery assembly during the manufacturing process provided in some embodiments of the present application Figure 7 .

[0078] Description of reference numerals:

[0079] 1. Electricity-consuming device; 2. Power-generating device; 100. Battery assembly; 101. First substrate; 102. Second substrate; 11. First battery; 12. First sub-battery; 121. First electrode layer; 122. Functional layer; 1221. First transmission layer; 1222. Light-absorbing layer; 1223. Second transmission layer; 123. Second electrode layer; 13. First bus bar; 14. First lead wire; 141. First sub-unit; 15. Second battery; 151. Battery pack; Z1. First battery pack; Z2. Second battery pack; 152. Battery string group; 153. Battery string; 16. Second sub-battery; 17. Second bus bar; 18. Second lead wire; 19. Interconnection bar; 21. Third bus bar; 22. First insulating layer; 23. First sealing layer; 24. Second sealing layer; 25. Third sealing layer; 26. Second insulating layer; S1. Opening; S2. Notch; S3. Through hole. DETAILED DESCRIPTION

[0080] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0081] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions.

[0082] In the description of the embodiments of this application, the technical terms "first," "second," "third," etc. are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise specifically defined.

[0083] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0084] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0085] In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", and "circumferential" are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0086] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0087] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and can be direct contact, contact through an intermediate medium layer, contact with essentially no interaction force between the two contacting parties, or contact with interaction force between the two contacting parties.

[0088] Below, this application is described in detail.

[0089] Current crystalline silicon-perovskite stacked cell modules usually require the use of multiple bus bars to electrically connect to the crystalline silicon solar cells and the perovskite solar cells respectively, and the multiple bus bars are led out of the cell module through multiple through holes located on the back panel glass. The bus bars connected to the perovskite solar cells and the bus bars connected to the crystalline silicon solar cells are led out from different through holes. Therefore, additional holes need to be drilled in the back panel glass to lead out the bus bars connected to the perovskite solar cells. This increases the number of openings in the back panel glass and reduces the mechanical properties of the cell module.

[0090] Based on this, the inventors proposed a technical solution, in which the battery assembly is a stacked battery assembly consisting of a first battery and a second battery, and the first bus bar electrically connected to the first battery and the second bus bar electrically connected to the second battery are located inside the space formed by the first substrate and the second substrate, wherein at least one first bus bar and the second bus bar are electrically connected inside the battery assembly through a first lead wire. In this way, for the first bus bar electrically connected to the second bus bar, there is no need to additionally set a lead wire that needs to be led out of the assembly to be connected separately, so there is no need to punch additional holes in the second substrate; and / or, the other end of at least one first lead wire connected to the first bus bar and the other end of at least one second lead wire are led out from the same through hole, so there is no need to punch additional holes in the second substrate to lead out the first lead wire separately, thereby improving the mechanical properties of the battery assembly and simplifying the manufacturing process of the battery assembly, which is conducive to the rapid mass production of stacked battery assemblies.

[0091] The technical solutions described in the embodiments of the present application are applicable to battery assemblies, electrical devices using battery assemblies, and power generation devices using battery assemblies. Figure 1 The schematic block diagram of the electric device 1 provided in some embodiments of the present application includes a battery assembly 100. The electric device 1 may be a vehicle, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, and the like. The vehicle may be a fuel vehicle, a gas vehicle, or a new energy vehicle; the spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, and the like; the electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, and the like; the electric tool may include a metal cutting electric tool, a grinding electric tool, an assembly electric tool, and an electric tool for railway use, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact drill, a concrete vibrator, and an electric planer, and the like. The embodiments of the present application do not impose any special restrictions on the above-mentioned electric device 1.

[0092] Figure 2 This is a schematic block diagram of a power generation device 2 provided in some embodiments of the present application. The power generation device 2 includes a battery assembly 100. The power generation device 2 may also have a control system and a transmission system. The power generation device 2 provided in the present application uses the control system and the transmission system to adjust the electrical energy generated by the battery assembly 100 to electrical energy that can match the electrical equipment.

[0093] Next, refer to 2a to Figure 27 Some embodiments of the present application are described in detail. Figure 3 、 Figure 11 、 Figure 15 、 Figure 18 、 Figure 21 、 Figure 24The second sealing layer, the third sealing layer, the second substrate and other structures are omitted.

[0094] As shown in the figure, the present application provides a battery assembly, comprising: a first substrate 101, a second substrate 102 located on the first substrate 101, a first battery 11 located between the first substrate 101 and the second substrate 102, and a second battery 15 located between the first battery 11 and the second substrate 102; the second substrate 102 has at least one through hole S3 penetrating the second substrate 102; a plurality of first bus bars 13 electrically connected to the first battery 11 and a plurality of second bus bars 17 electrically connected to the second battery 15, located on the first substrate 101. and the second substrate 102; a plurality of first lead-out wires 14, one end of the first lead-out wire 14 is connected to the first bus bar 13; at least one second lead-out wire 18, one end of the second lead-out wire 18 is connected to the second bus bar 17, and the other end is led out from the through hole S3; wherein, the other end of at least one first lead-out wire 14 is connected to the second bus bar 17; and / or, the other end of at least one first lead-out wire 14 is led out from the through hole S3, and the other end of the first lead-out wire 14 and the other end of at least one second lead-out wire 18 are led out from the same through hole S3.

[0095] In some embodiments, the materials of the first substrate 101 and the second substrate 102 may be the same or different. In some embodiments, the first substrate 101 and the second substrate 102 include inorganic substrates made of quartz, sapphire, glass, etc., and transparent plastic substrates made of polyethylene terephthalate, polyethylene naphthalate, polycarbonate, polystyrene, polyethylene, polypropylene, polyphenylene sulfide, polyvinylidene fluoride, tetraacetyl cellulose, brominated phenoxy, aromatic polyamides, polyimides, polystyrenes, polyarylates, polysulfones, polyolefins, etc. In a specific embodiment, both the first substrate 101 and the second substrate 102 may be glass substrates.

[0096] like Figure 6 As shown, in some embodiments, the edges of the first battery 11 and the second battery 15 are indented inward relative to the edges of the first substrate 101 and the second substrate 102. The battery assembly may further include a third sealing layer 25, which is disposed along the edges of the first substrate 101 and the second substrate 102. The second substrate 102 and the first substrate 101 are sealed together by the third sealing layer 25. The material of the third sealing layer 25 includes, but is not limited to, butyl rubber.

[0097] In some embodiments, the first battery 11 may include one or more first sub-batteries 12. When there are multiple first sub-batteries 12, the multiple first sub-batteries 12 may be connected in series, in parallel, or in mixed connection. Figure 7As shown, in some embodiments, the first battery 11 includes a plurality of first sub-batteries 12 arranged along a third direction on the first substrate 101 and extending along a fourth direction intersecting (including perpendicular or oblique) the third direction, and the plurality of first sub-batteries 12 are sequentially connected in series along the third direction.

[0098] like Figure 8 As shown, in some embodiments, the first sub-cell 12 includes a first electrode layer 121 , a functional layer 122 , and a second electrode layer 123 stacked sequentially from bottom to top on the first substrate 101 .

[0099] In some embodiments, the material of the first electrode layer 121 and the second electrode layer 123 can be a transparent electrode material, including but not limited to one or more of indium tin oxide (ITO), aluminum zinc oxide (AZO), tungsten-doped indium oxide (IWO), cerium-doped indium oxide (ICO), fluorine-doped tin oxide (FTO), zinc-doped zinc oxide (IZO) and antimony-doped tin oxide (ATO), such as fluorine-doped tin oxide (FTO), so that light incident from the first substrate 101 can penetrate the first cell 11 and reach the second cell 15.

[0100] In some embodiments, functional layer 122 includes a light-absorbing layer 1222 located between first electrode layer 121 and second electrode layer 123. Light-absorbing layer 1222 may include one or more of a perovskite light-absorbing layer, an amorphous silicon light-absorbing layer, a copper indium gallium selenide light-absorbing layer, a cadmium telluride light-absorbing layer, a gallium arsenide light-absorbing layer, or an organic dye light-absorbing layer. These light-absorbing layers can be used to prepare thin-film solar cells with light-absorbing layer thicknesses in the micrometer or nanometer range, thereby expanding the application scenarios of the solar cell module. Furthermore, light-absorbing layer 1222 may be a perovskite light-absorbing layer, and first cell 11 may comprise a perovskite solar cell.

[0101] In some embodiments, the functional layer 122 further includes a first transport layer 1221 located between the first electrode layer 121 and the light absorbing layer 1222, and / or a second transport layer 1223 located between the light absorbing layer 1222 and the second electrode layer 123, one of the first transport layer 1221 and the second transport layer 1223 is an electron transport layer, and the other is a hole transport layer. The provision of the electron transport layer and / or the hole transport layer helps to extract and transport the electron-hole pairs generated by the light absorbing layer 1222 to the corresponding electrode, thereby improving the carrier transport capacity. Depending on the actual situation, the electron transport layer and the hole transport layer can be respectively provided on both sides of the light absorbing layer 1222, or one of the two can be selected on one side of the light absorbing layer 1222, such as only providing a hole transport layer, which is not limited here.

[0102] like Figure 7As shown, in some embodiments, there can be two first bus bars 13, each of which can be connected to the positive and negative electrodes of the first battery 11, respectively. In some embodiments, the first bus bars 13 are disposed on a surface of the first sub-cell 12 located at both sides of the first battery 11 along the third direction, facing away from the first substrate 101, and extend along the extension direction (fourth direction) of the first sub-cell 12. The first bus bars 13 can be connected to the second electrode layer 123 of the first sub-cell 12 located at the edge along the third direction. However, this is not limiting, and the number of first bus bars 13 can be greater, and the first bus bars 13 can be connected to the first battery 11 in other ways.

[0103] Figure 7 The extending length of the first bus bar 13 in the fourth direction is the same as the extending length of the first battery 11 in the fourth direction, but the present invention is not limited thereto. The extending length of the first bus bar 13 in the fourth direction may also be longer or shorter.

[0104] In some embodiments, the first lead wires 14 are respectively disposed at both side edges of the first battery 11 along the third direction and extend toward the middle region of the first battery 11 .

[0105] In practice, the material of the first busbar 13 may include conductive tape to facilitate bonding to the first sub-cell 12, such as one or more of conductive cloth-based tape, conductive rubber tape, and conductive copper tape. The material of the first lead wire 14 may include one or more of copper, aluminum, silver, gold, tinned copper, or alloys thereof. However, the present invention is not limited thereto. The material of the first busbar 13 may also be the same as that of the first lead wire 14, and the first busbar 13 and the first lead wire 14 may also be integrally formed.

[0106] In some embodiments, the second cell 15 may be a crystalline silicon solar cell, and the side of the second cell 15 facing the first cell 11 may be the front side, and the side facing away from the first cell 11 may be the back side.

[0107] In some embodiments, the second battery 15 may include one battery pack 151 or multiple battery packs 151 distributed at intervals; Figure 9 As shown, in the case where there are multiple battery groups 151, the multiple battery groups 151 may include a first battery group Z1 and a second battery group Z2 that are spaced apart and adjacent to each other along a first direction parallel to the plane of the first substrate 101, and at least one second bus bar 17 is located between the first battery group Z1 and the second battery group Z2; but not limited to this, as shown in FIG. Figure 24 and Figure 27As shown, at least one second bus bar 17 may also be provided along the first direction on at least one side of the second battery 15. In this way, in the vertical direction, the second battery 15 will not block or obstruct the second bus bar 17, making it easier to subsequently lead the first lead wire 14 out from below the plane where the second battery 15 is located, thereby facilitating connection between the first lead wire 14 and the second bus bar 17, or leading the first lead wire 14 out from the through hole S3, and preventing the first lead wire 14 from blocking light to the second battery 15.

[0108] In some embodiments, each battery group 151 may include a plurality of battery string groups 152 (for example, 3) arranged along the second direction and connected in series, and any battery string group 152 may include a plurality of battery strings 153 (for example, two) arranged along the second direction and connected in series, and each battery string 153 may include a plurality of second sub-batteries 16 arranged along the first direction and connected in series, and the second sub-batteries 16 may be a whole cell or a half cell, etc.

[0109] Here, the first direction and the second direction intersect and are both parallel to the plane of the first substrate 101 , and the first direction may be the same as the extension direction of the first sub-cell 12 (ie, the fourth direction), and the second direction may be the same as the arrangement direction of the plurality of first sub-cells 12 (ie, the third direction).

[0110] In some embodiments, the second sub-cell 16 may include a third electrode layer (not shown) located on a side of the second sub-cell 16 facing the first cell 11, and a fourth electrode layer (not shown) located on a side of the second sub-cell 16 facing away from the first cell 11. The third electrode layer may be the negative electrode or positive electrode of the second sub-cell 16, and the fourth electrode layer may be the positive electrode or negative electrode of the second sub-cell 16. In some embodiments, the battery assembly further includes: a plurality of interconnecting bars 19. In each battery string 153, the positive electrode or negative electrode of one of the two adjacent second sub-cells 16 is electrically connected to the negative electrode or positive electrode of the other via the interconnecting bars 19, thereby achieving series connection of the multiple second sub-cells 16 in any battery string 153 along the first direction.

[0111] like Figure 9 and Figure 10As shown, in some embodiments, when the second battery 15 includes a first battery group Z1 and a second battery group Z2, the second sub-battery 16 can be a half-cell battery cell, and a plurality of second bus bars 17 can be arranged between the first battery group Z1 and the second battery group Z2 and arranged at intervals along the second direction. The plurality of battery string groups 152 of the first battery group Z1 and the plurality of battery string groups 152 of the second battery group Z2 are connected in parallel through the second bus bar 17, and two adjacent battery string groups 152 in any battery group 151 in the second direction are connected in series through the second bus bar 17, and the two second bus bars 17 located at the edge along the second direction are electrically connected to the positive and negative poles of the second battery 15, respectively.

[0112] But not limited to this, such as Figure 24 and Figure 27 As shown, in other embodiments of the present application, multiple second bus bars 17 can also be located on one side of the second battery 15 along the first direction and arranged at intervals along the second direction, and the second battery 15 can include a battery pack 151, the second sub-battery 16 in the battery pack 151 can be a whole battery cell, and two adjacent battery string groups 152 in the second direction are connected in series through the second bus bar 17, and the two second bus bars 17 located at the edge along the second direction are electrically connected to the positive and negative poles of the second battery 15, respectively.

[0113] like Figure 9 and Figure 27 As shown, in some embodiments, the battery assembly may further include: a plurality of third bus bars 21 located along the first direction on a side of any battery group 151 away from the plurality of second bus bars 17, and the battery strings 153 of the battery string group 152 are connected in series via the third bus bars 21. In actual operation, the second bus bars 17 and the third bus bars 21 may be electrically connected to the positive or negative electrodes of the corresponding second sub-batteries 16 via the plurality of interconnecting bars 19.

[0114] In actual operation, the materials of the second bus bar 17 , the interconnection bar 19 and the third bus bar 21 may include one or more of copper, aluminum, silver, gold, tinned copper or alloys thereof.

[0115] like Figure 5 and Figure 6 As shown, in some embodiments, the battery assembly further includes: a first sealing layer 23, which is located on the side of the second battery 15 and the second bus bar 17 facing the first battery 11 and covers at least a portion of the first battery 11. The first sealing layer 23 is used to electrically isolate the first battery 11 from the second battery 15. The orthographic projections of the second battery 15 and the second bus bar 17 on the plane of the first substrate 101 fall within the orthographic projection of the first sealing layer 23 on the plane of the first substrate 101. The edge of the first sealing layer 23 can slightly protrude outward from the edge of the second battery 15 to enhance the isolation effect of the first sealing layer 23.

[0116] like Figures 3 to 5 As shown, in some embodiments, the first sealing layer 23 has an opening S1 that passes through the first sealing layer 23; one end of at least one first lead-out line 14 is connected to the first bus bar 13, and the other end is led out from the opening S1 and connected to the second bus bar 17, that is, part of the first lead-out line 14 is located on the side of the first sealing layer 23 away from the first substrate 101 and is connected to the second bus bar 17, so that at least one first bus bar 13 and the second bus bar 17 are interconnected inside the battery assembly.

[0117] In actual operation, the end of the first lead wire 14 away from the first bus bar 13 can be overlapped and welded to the upper surface or side surface of the second bus bar 17. However, the present invention is not limited thereto. The end of the first lead wire 14 away from the first bus bar 13 can also be welded to the lower surface of the second bus bar 17.

[0118] It should be noted that the interior of the battery assembly in this application refers to the interior of the space formed by the first substrate 101 and the second substrate 102; leading out from the opening S1 refers to leading out from the side of the first sealing layer 23 toward the first substrate 101 through the opening S1 to the side of the first sealing layer 23 away from the first substrate 101.

[0119] In some embodiments, the two first lead-out lines 14 are respectively arranged at the two side edges of the first battery 11 along the second direction and extend toward the middle area of the first battery 11, and the two first lead-out lines 14 are respectively connected to the two second bus bars 17 located at the edges along the second direction to realize the parallel connection of the first battery 11 and the second battery 15 inside the battery assembly.

[0120] Figure 5 The opening S1 shown in FIG is located on both sides of the plurality of second bus bars 17 along the second direction. However, the present invention is not limited thereto, and the opening S1 may also be located between two adjacent second bus bars 17, and the end of the first lead wire 14 away from the first bus bar 13 may also be connected to another second bus bar 17 located between two second bus bars 17 at the edge along the second direction.

[0121] In some embodiments, the battery assembly further includes at least one second lead wire 18, one end of which is connected to the second bus bar 17 and the other end of which is led out through the through hole S3. In practice, the second lead wire 18 can be welded to the second bus bar 17, or the second lead wire 18 can be integrally formed with the second bus bar 17. However, the present invention is not limited thereto, and the second lead wire 18 can also be welded to the first lead wire 14 and connected to the second bus bar 17.

[0122] like Figure 3 and Figure 5As shown, in some embodiments, a plurality of second bus bars 17 extend along the second direction and are spaced apart along the second direction, and the two ends of any two adjacent second bus bars 17 that are close to each other are respectively connected to one end of the second lead wire 18, and the other end of the second lead wire 18 connected to the two ends that are close to each other can be led out from the same through hole S3 and introduced into the same junction box.

[0123] It should be noted that, in the present application, “leading out from the through hole S3” means leading the lead wire out from the space formed by the first substrate 101 and the second substrate 102 through the through hole S3 , that is, leading out from the interior of the battery assembly.

[0124] In some embodiments of the present application, a first bus bar 13 electrically connected to the first battery 11 and a second bus bar 17 electrically connected to the second battery 15 are located inside the battery assembly, and at least one of the first bus bar 13 and the second bus bar 17 are electrically connected inside the battery assembly through a first lead wire 14. In this way, for the first bus bar 13 electrically connected to the second bus bar 17, there is no need to additionally set a lead wire that needs to be led out of the assembly to be connected separately thereto, and there is no need to additionally punch holes on the second substrate 102 to lead out the lead wire that is separately connected to the first bus bar 13, thereby improving the mechanical properties of the battery assembly and simplifying the manufacturing process of the battery assembly, which is conducive to the rapid mass production of laminated battery assemblies.

[0125] Figures 3 to 5 The end of the at least one first lead wire 14 extending from the opening S1 is connected to the second bus bar 17, thereby electrically connecting the at least one first bus bar 13 and the second bus bar 17 within the assembly. However, the embodiment is not limited thereto. The end of the at least one first lead wire 14 extending from the opening S1 may also be extended from the through hole S3, so that the at least one first bus bar 13 and the second bus bar 17 are independently arranged within the battery assembly.

[0126] Specifically, such as Figure 11 and Figure 14 As shown, in some embodiments, one end of at least one first lead wire 14 is connected to the first bus bar 13, and the other end is led out from the opening S1 and the through hole S3, so that at least one first bus bar 13 and the second bus bar 17 are independently arranged inside the battery assembly.

[0127] In some embodiments of the present application, at least one first lead-out wire 14 at one end away from the first bus bar 13 and at least one second lead-out wire 18 at one end away from the second bus bar 17 are led out from the same through hole S3. In this way, there is no need to punch additional holes to lead out the first lead-out wire 14 separately, thereby improving the mechanical properties of the battery assembly and simplifying the manufacturing process of the battery assembly, which is conducive to the rapid mass production of laminated battery assemblies.

[0128] In some embodiments, the opening S1 can be located between two adjacent second bus bars 17, and the ends of the two adjacent second bus bars 17 near the opening S1 are respectively connected to the second lead wire 18. The other end of the first lead wire 14 led out from the opening S1 and the other end of the second lead wire 18 connected to the end of the second bus bar 17 near the opening S1 are led out from the same through hole S3. In this way, the first lead wire 14 and the two adjacent second lead wires 18 are led out from the same through hole S3 and can be introduced into the same junction box, further reducing the number of holes punched in the second substrate 102 and simplifying the battery assembly manufacturing process. The first lead wire 14 leading out of the battery assembly can be connected to the second lead wire 18, or it can be set independently of the second lead wire 18.

[0129] like Figures 11 to 14 As shown, in some embodiments, the number of the first lead-out wires 14 is two, one end of the two first lead-out wires 14 is electrically connected to the positive electrode and the negative electrode of the first battery 11 respectively through the first bus bar 13, and the other end is led out from different through holes S3 respectively. In this way, the circuit of the first battery 11 and the circuit of the second battery 15 are independently arranged inside the component.

[0130] However, the present invention is not limited thereto. In some embodiments, the other end of part of the first lead wires 14 can be connected to the second bus bar 17, and the other end of part of the first lead wires 14 can be led out from the through hole S3, which can be used to realize series connection, parallel connection or mixed connection of multiple first sub-batteries 12 and multiple second sub-batteries 16.

[0131] like Figure 5 、 Figure 7 as well as Figure 13 As shown, in some embodiments, at least one first lead-out line 14 includes a first sub-portion 141, which is located on the side of the first sealing layer 23 facing the first substrate 101 and is connected to the first bus bar 13, and the first sub-portion 141 covers a portion of the first battery 11; the battery assembly also includes: a first insulating layer 22, which is located on the side of the first sub-portion 141 facing the first battery 11 and covers at least the portion of the first battery 11 covered by the first sub-portion 141. In this way, the first insulating layer 22 is used to separate the first lead-out line 14 and the first battery 11 to avoid the risk of short circuit.

[0132] In some embodiments, the first sub-portion 141 and the first insulating layer 22 may extend in a straight line along the third direction. However, the present invention is not limited thereto and the first sub-portion 141 and the first insulating layer 22 may also extend in a straight line along other directions, or along a curve or a broken line to increase the applicability of different scenarios.

[0133] However, the present invention is not limited to this, and the first lead-out line 14 may also not be provided with the first sub-portion 141, and the opening S1 may be located above the first bus bar 13, one end of the first lead-out line 14 is located in the opening S1 and connected to the first bus bar 13 located below the opening S1, and the other end is located on the side of the first sealing layer 23 away from the first battery 11, and is connected to the second bus bar 17 or led out from the through hole S3. In this way, the first lead-out line 14 and the first battery 11 are separated by the first sealing layer 23, and there is no need to additionally provide the first insulating layer 22.

[0134] like Figures 3 to 5 as well as Figures 11 to 13 As shown, in some embodiments, the first sealing layer 23 may completely cover the first battery 11, the first bus bar 13, and the first sub-portion 141. The sidewalls of the first sealing layer 23 may be substantially flush with the sidewalls of the first battery 11, or may protrude outward from the sidewalls of the first battery 11. However, the present invention is not limited thereto. The first sealing layer 23 may also partially cover the first battery 11, and in the second direction, at least one side edge of the first sealing layer 23 may be retracted inward relative to the edge of the first battery 11. The first sealing layer 23 may cover a portion of the first bus bar or a portion of the first sub-portion 141.

[0135] like Figure 5 and Figure 6 as well as Figure 13 As shown, in some embodiments, the battery assembly further includes: a second sealing layer 24, the second sealing layer 24 is located between the second battery 15 and the second substrate 102, and covers the first battery 11, the second battery 15, the first bus bar 13 and the second bus bar 17, the first lead wire 14 and / or the second lead wire 18 passes through the second sealing layer 24 in a vertical direction and is led out from the through hole S3.

[0136] In actual operation, the materials of the first sealing layer 23 and the second sealing layer 24 can be the same or different. The materials of the first sealing layer 23 and the second sealing layer 24 can include one or more of butyl rubber, polyisobutylene, polyisoprene, polyolefin elastomer, ethylene-vinyl acetate copolymer, thermoplastic polyurethane elastomer and polyvinyl butyral.

[0137] like Figures 15 to 17As shown, in some other embodiments of the present application, in the second direction, at least one side edge of the first sealing layer 23 has a notch S2, exposing at least a portion of the first bus bar 13 by the notch S2. At least one first lead wire 14 is located on a side of the first sealing layer 23 away from the first battery 11, with one end connected to the first bus bar 13 exposed by the notch S2 and the other end connected to the second bus bar 17. In this manner, there is no need to form an opening S1 in the first sealing layer 23, eliminating the need to insert the first lead wire 14 through the opening S1. Furthermore, the first lead wire 14 is separated from the first battery 11 by the first sealing layer 23, eliminating the need for the first insulating layer 22, further simplifying the manufacturing process of the battery assembly.

[0138] In some embodiments, the notch S2 is located at both side edges of the first sealing layer 23 along the second direction, the first lead wire 14 extends toward the middle area of the first battery 11 along the second direction, and is connected to the second bus bar 17 located at the edge along the second direction.

[0139] In practice, the first bus bar 13 may be a structure that continuously extends along the fourth direction below the first sealing layer 23, with only a portion of the first bus bar 13 exposed by the notch S2. However, the present invention is not limited thereto, and the first bus bar 13 may also be a structure that is disposed within the notch S2 and has a shorter extension length.

[0140] like Figures 18 to 20 As shown, in some further embodiments of the present application, at least one edge of the first sealing layer 23 in the second direction is indented inward relative to the edge of the first battery 11. At least one first bus bar 13 is located on at least one side of the first sealing layer 23 along the second direction and is spaced apart from the first sealing layer 23. The battery assembly further includes a second insulating layer 26, which is located between the first bus bar 13 and the first sealing layer 23 and covers a portion of the first battery 11. At least one first lead wire 14 is located on a surface of the second insulating layer 26 and the first sealing layer 23 facing away from the first battery 11, with one end connected to the first bus bar 13 located on at least one side of the first sealing layer 23 along the second direction and the other end connected to the second bus bar 17. In this manner, there is no need to form an opening S1 in the first sealing layer 23, and the process of inserting the first lead wire 14 through the opening S1 is omitted, further simplifying the manufacturing process of the battery assembly. The first lead wire 14 is separated from the first battery 11 by the first sealing layer 23 and the second insulating layer 26, thereby avoiding the risk of short circuit.

[0141] In some embodiments, in the second direction, both side edges of the first sealing layer 23 are indented inward relative to the edge of the first battery 11, the two first bus bars 13 are located on both sides of the first sealing layer 23 along the second direction, and the two first lead wires 14 are respectively connected to the second bus bars 17 located on the two side edges along the second direction.

[0142] like Figures 21 to 23 As shown, in some embodiments, at least one first bus bar 13 is located on at least one side of the first sealing layer 23 along the second direction and contacts the first sealing layer 23, and at least one first lead wire 14 is located on the side of the first sealing layer 23 away from the first battery 11, with one end connected to the first bus bar 13 located on one side of the first sealing layer 23 along the second direction, and the other end connected to the second bus bar 17; in this way, there is no need to form an opening S1 in the first sealing layer 23, and the process of inserting the first lead wire 14 through the opening S1 is omitted, and the first lead wire 14 is separated from the first battery 11 by the first sealing layer 23, and there is no need to additionally set the second insulating layer 26, which further simplifies the manufacturing process of the battery assembly.

[0143] Figures 3 to 5 、 Figures 15 to 17 、 Figures 18 to 20 as well as Figures 21 to 23 The structure shown provides different connection methods for the first bus bar 13 and the second bus bar 17 respectively. Any first bus bar 13 can be connected to the second bus bar 17 in any method, and multiple first bus bars 13 can be connected to the second bus bar 17 in the same or different methods.

[0144] Figures 3 to 23 In the battery assembly shown, the plurality of second bus bars 17 and the first lead wires 14 are located in the middle area of the battery assembly. Figure 24 and Figure 27 As shown, in some other embodiments of the present application, the plurality of second bus bars 17 and the first lead wires 14 may also be located in the end region of the battery assembly in the first direction.

[0145] Specifically, such as Figures 3 to 23 As shown, in some embodiments, when the plurality of second bus bars 17 are located between the first battery group Z1 and the second battery group Z2, the orthographic projection of the first lead wire 14 on the plane where the second battery 15 is located is located between the first battery group Z1 and the second battery group Z2. Figure 24 and Figure 27As shown, when multiple second bus bars 17 are arranged along the first direction on one side of the second battery 15 in the first direction, the orthographic projection of the first lead wire 14 on the plane where the second battery 15 is located is located on the same side of the second battery 15 in the first direction as the second bus bar 17. That is, in the present application, the first lead wire 14 and the second bus bar 17 are arranged in the same area of the battery assembly. This makes it easy to lead the first lead wire 14 to the vicinity of the second bus bar 17, thereby facilitating its connection with the second bus bar 17, or to facilitate the first lead wire 14 and the second lead wire 18 connected to the second bus bar 17 to pass through the same through hole S3, thereby reducing the process complexity of the first lead wire 14 and simplifying the manufacturing process of the battery assembly.

[0146] Figure 25 The first lead wire 14 shown in FIG is located on the side of the first battery 11 away from the first substrate 101 , and the orthographic projection of the first lead wire 14 on the plane of the first substrate 101 falls within the orthographic projection of the first battery 11 on the plane of the first substrate 101 .

[0147] However, the present invention is not limited thereto, and the first lead wire 14 can also be arranged at other locations. Figure 26 As shown, in some other embodiments of the present application, the first lead wire 14 is arranged on one side of the first battery 11 along the first direction, and part of the first bus bar 13 protrudes from the edge of the first battery 11 along the first direction and is connected to the first lead wire 14.

[0148] In some embodiments of the present application, when multiple second bus bars 17 and the first lead wire 14 are located in the end area of the battery assembly in the first direction, the end of the first lead wire 14 away from the first bus bar 13 can be connected to the second bus bar 17 or led out from the through hole S3 in the same manner as described above, which will not be repeated here.

[0149] The present application also provides a method for manufacturing a solar cell, such as Figure 28 As shown, the manufacturing method includes:

[0150] Step S101: providing a first substrate, forming a first battery on the first substrate, and forming a plurality of first bus bars and a plurality of first lead wires, wherein the first bus bars are electrically connected to the first battery, and one end of the first lead wire is connected to the first bus bar;

[0151] Step S102: providing a second battery, placing the second battery on the first battery, and forming a plurality of second bus bars and at least one second lead wire, wherein the second bus bar is electrically connected to the second battery, and one end of the second lead wire is connected to the second bus bar;

[0152] Step S103: providing a second substrate, setting the second substrate on the second battery, the second substrate having at least one through-hole penetrating the second substrate, and leading the other end of the second lead wire out from the through-hole; wherein, before the second substrate is set on the second battery, the other end of the at least one first lead wire is connected to the second bus bar; and / or, after the second substrate is set on the second battery, the other end of the at least one first lead wire is led out from the through-hole, and the other end of the first lead wire and the other end of the at least one second lead wire are led out from the same through-hole.

[0153] The manufacturing method of the present application is further described in detail below with reference to the accompanying drawings; wherein, Figure 31 Before forming the second sealing layer and the second substrate on the second battery Figure 3 A schematic diagram of the cross-sectional structure taken along the line connecting A and A'; Figure 32 Before forming the second sealing layer and the second substrate on the second battery Figure 11 Schematic diagram of the cross-sectional structure taken by the line connecting A and A'.

[0154] First, if Figure 29 and Figure 8 As shown, step S101 is performed to provide a first substrate 101, form a first battery 11 on the first substrate 101, and form a plurality of first bus bars 13 and a plurality of first lead wires 14, wherein the first bus bar 13 is electrically connected to the first battery 11, and one end of the first lead wire 14 is connected to the first bus bar 13.

[0155] In some embodiments, the first battery 11 may include one or more first sub-batteries 12. When there are multiple first sub-batteries 12, the multiple first sub-batteries 12 may be connected in series, in parallel, or in mixed connection. Figure 29 As shown, in some embodiments, the first battery 11 includes a plurality of first sub-batteries 12 arranged along a third direction on the first substrate 101 and extending along a fourth direction intersecting (including perpendicular or oblique) the third direction, and the plurality of first sub-batteries 12 are sequentially connected in series along the third direction.

[0156] like Figure 8 As shown, in some embodiments, the first sub-cell 12 includes a first electrode layer 121, a functional layer 122, and a second electrode layer 123 stacked sequentially from bottom to top on the first substrate 101. The materials of the first electrode layer 121 and the second electrode layer 123 are as described above and will not be repeated here.

[0157] In some embodiments, functional layer 122 includes a light-absorbing layer 1222 located between first electrode layer 121 and second electrode layer 123. Light-absorbing layer 1222 may include one or more of a perovskite light-absorbing layer, an amorphous silicon light-absorbing layer, a copper indium gallium selenide light-absorbing layer, a cadmium telluride light-absorbing layer, a gallium arsenide light-absorbing layer, or an organic dye light-absorbing layer. These light-absorbing layers can be used to prepare thin-film solar cells with light-absorbing layer thicknesses in the micrometer or nanometer range, thereby expanding the application scenarios of the solar cell module. Furthermore, light-absorbing layer 1222 may be a perovskite light-absorbing layer, and first cell 11 may comprise a perovskite solar cell.

[0158] In some embodiments, the functional layer 122 further includes a first transport layer 1221 located between the first electrode layer 121 and the light absorbing layer 1222, and / or a second transport layer 1223 located between the light absorbing layer 1222 and the second electrode layer 123, one of the first transport layer 1221 and the second transport layer 1223 is an electron transport layer, and the other is a hole transport layer. The provision of the electron transport layer and / or the hole transport layer helps to extract and transport the electron-hole pairs generated by the light absorbing layer 1222 to the corresponding electrode, thereby improving the carrier transport capacity. Depending on the actual situation, the electron transport layer and the hole transport layer can be respectively provided on both sides of the light absorbing layer 1222, or one of the two can be selected on one side of the light absorbing layer 1222, such as only providing a hole transport layer, which is not limited here.

[0159] like Figure 29 As shown, in some embodiments, there can be two first bus bars 13, each of which can be connected to the positive and negative electrodes of the first battery 11, respectively. In some embodiments, the first bus bars 13 are disposed on a surface of the first sub-cell 12 located at both sides of the first battery 11 along the third direction, facing away from the first substrate 101, and extend along the extension direction (fourth direction) of the first sub-cell 12. The first bus bars 13 can be connected to the second electrode layer 123 of the first sub-cell 12 located at the edge along the third direction. However, this is not limiting, and the number of first bus bars 13 can be greater, and the first bus bars 13 can be connected to the first battery 11 in other ways. Figure 29 The extending length of the first bus bar 13 in the fourth direction is the same as the extending length of the first battery 11 in the fourth direction, but the present invention is not limited thereto. The extending length of the first bus bar 13 in the fourth direction may also be longer or shorter.

[0160] In some embodiments, the first lead wires 14 are respectively disposed along the third direction at both side edges of the first battery 11 , one end of which is connected to the first bus bar 13 , and the other end of which extends toward the middle area of the first battery 11 .

[0161] In practice, the material of the first busbar 13 may include conductive tape to facilitate bonding to the first sub-cell 12, such as one or more of conductive cloth-based tape, conductive rubber tape, and conductive copper tape. The material of the first lead wire 14 may include one or more of copper, aluminum, silver, gold, tinned copper, or alloys thereof. However, the present invention is not limited thereto. The material of the first busbar 13 may also be the same as that of the first lead wire 14, and the first busbar 13 and the first lead wire 14 may also be integrally formed.

[0162] Next, step S102 is performed to provide a second battery 15 (see Figure 9 ), the second battery 15 is placed on the first battery 11, and a plurality of second bus bars 17 and at least one second lead wire 18 are formed, the second bus bar 17 is electrically connected to the second battery 15, and one end of the second lead wire 18 is connected to the second bus bar 17, forming a Figure 3 、 Figure 4 and Figure 31 The structure shown.

[0163] In some embodiments, the second cell 15 may be a crystalline silicon solar cell, and the front surface of the second cell 15 may be arranged toward the first cell 11 .

[0164] In some embodiments, the second battery 15 may include one battery pack 151 or multiple battery packs 151 distributed at intervals; Figure 9 As shown, in the case where there are multiple battery groups 151, the multiple battery groups 151 may include a first battery group Z1 and a second battery group Z2 that are spaced apart and adjacent to each other along a first direction parallel to the plane of the first substrate 101, and at least one second bus bar 17 is located between the first battery group Z1 and the second battery group Z2; but not limited to this, as shown in FIG. Figure 24 and Figure 27 As shown, at least one second bus bar 17 may also be provided along the first direction on at least one side of the second battery 15. In this way, in the vertical direction, the second battery 15 will not block or obstruct the second bus bar 17, making it easier to subsequently lead the first lead wire 14 out from below the plane where the second battery 15 is located, thereby facilitating connection between the first lead wire 14 and the second bus bar 17, or leading the first lead wire 14 out from the through hole S3, and preventing the first lead wire 14 from blocking light to the second battery 15.

[0165] like Figure 9As shown, in some embodiments, each battery group 151 may include a plurality of battery string groups 152 (for example, 3) arranged along the second direction and connected in series, any battery string group 152 may include a plurality of battery strings 153 (for example, two) arranged along the second direction and connected in series, each battery string 153 may include a plurality of second sub-batteries 16 arranged along the first direction and connected in series, and the second sub-batteries 16 may be a whole cell or a half cell, etc.

[0166] Here, the first direction and the second direction intersect and are both parallel to the plane of the first substrate 101 , and the first direction may be the same as the extension direction of the first sub-cell 12 (ie, the fourth direction), and the second direction may be the same as the arrangement direction of the plurality of first sub-cells 12 (ie, the third direction).

[0167] In some embodiments, the second sub-cell 16 may include a third electrode layer (not shown) located on a side of the second sub-cell 16 facing the first cell 11, and a fourth electrode layer (not shown) located on a side of the second sub-cell 16 facing away from the first cell 11. The third electrode layer may be the negative electrode or positive electrode of the second sub-cell 16, and the fourth electrode layer may be the positive electrode or negative electrode of the second sub-cell 16. In some embodiments, the battery assembly further includes: a plurality of interconnecting bars 19. In each battery string 153, the positive electrode or negative electrode of one of the two adjacent second sub-cells 16 is electrically connected to the negative electrode or positive electrode of the other via the interconnecting bars 19, thereby achieving series connection of the multiple second sub-cells 16 in any battery string 153 along the first direction.

[0168] like Figure 9 As shown, in some embodiments, when the second battery 15 includes a first battery group Z1 and a second battery group Z2, the second sub-battery 16 can be a half-cell battery cell, and a plurality of second bus bars 17 can be arranged between the first battery group Z1 and the second battery group Z2 and arranged at intervals along the second direction. The plurality of battery string groups 152 of the first battery group Z1 and the plurality of battery string groups 152 of the second battery group Z2 are connected in parallel through the second bus bar 17, and two adjacent battery string groups 152 in any battery group 151 in the second direction are connected in series through the second bus bar 17, and the two second bus bars 17 located at the edge along the second direction are electrically connected to the positive and negative poles of the second battery 15, respectively.

[0169] But not limited to this, such as Figure 24 and Figure 27As shown, in other embodiments of the present application, multiple second bus bars 17 can also be located on one side of the second battery 15 along the first direction and arranged at intervals along the second direction, and the second battery 15 can include a battery pack 151, the second sub-battery 16 in the battery pack 151 can be a whole battery cell, and two adjacent battery string groups 152 in the second direction are connected in series through the second bus bar 17, and the two second bus bars 17 located at the edge along the second direction are electrically connected to the positive and negative poles of the second battery 15, respectively.

[0170] In some embodiments, the battery assembly may further include: a plurality of third bus bars 21 located along the first direction on a side of any battery group 151 away from the plurality of second bus bars 17, and the battery strings 153 of the battery string group 152 are connected in series via the third bus bars 21. In actual operation, the second bus bars 17 and the third bus bars 21 may be electrically connected to the positive or negative electrodes of the corresponding second sub-batteries 16 via the plurality of interconnecting bars 19.

[0171] In actual operation, first, Figure 9 As shown, multiple second sub-cells 16 are arranged and welded to the second bus bar 17, the interconnection bar 19 and the third bus bar 21. Then, the second cell 15 is placed on the first cell 11 to form a circuit as shown in FIG. Figure 3 、 Figure 4 and Figure 31 The second bus bar 17 , the interconnection bar 19 and the third bus bar 21 may be made of one or more materials including copper, aluminum, silver, gold, tinned copper or alloys thereof.

[0172] Continue to see Figure 9 In actual operation, at least one second lead wire 18 can be formed before or after the second battery 15 is placed on the first battery 11, and one end of the second lead wire 18 is electrically connected to the second bus bar 17. The number of second lead wires 18 can also be multiple, and the second bus bars 17 extend along the second direction and are arranged at intervals along the second direction. The two adjacent ends of any two adjacent second bus bars 17 are respectively electrically connected to one end of the second lead wire 18, and the other ends of the second lead wires 18 connected to the two adjacent ends can subsequently be led out from the same through hole S3 and introduced into the same junction box.

[0173] In actual operation, the second lead wire 18 and the second bus bar 17 may be welded together, or the second lead wire 18 and the second bus bar 17 may be formed integrally.

[0174] like Figure 30As shown, in some embodiments, before placing the second cell 15 on the first cell 11, the process further includes forming a first sealing layer 23. The first sealing layer 23 is located on the side of the second cell 15 and the second bus bar 17 facing the first cell 11 and covers at least a portion of the first cell 11. The first sealing layer 23 serves to electrically isolate the first cell 11 from the second cell 15. In some embodiments, the orthographic projections of the second cell 15 and the second bus bar 17 on the plane of the first substrate 101 fall within the orthographic projection of the first sealing layer 23 on the plane of the first substrate 101, and the edges of the first sealing layer 23 may slightly protrude beyond the edges of the second cell 15 to enhance the isolation effect of the first sealing layer 23.

[0175] Next, step S103 is performed to provide a second substrate 102, and the second substrate 102 is placed on the second battery 15. The second substrate 102 has at least one through hole S3 that penetrates the second substrate 102, and the other end of the second lead wire 18 is led out from the through hole S3 to form a Figure 5 and Figure 6 The structure shown.

[0176] In this way, the first battery 11 and the second battery 15 are encapsulated between the first substrate 101 and the second substrate 102. In some embodiments, the materials of the first substrate 101 and the second substrate 102 can be the same or different. In some embodiments, the first substrate 101 and the second substrate 102 include inorganic substrates made of quartz, sapphire, glass, etc., and transparent plastic substrates made of polyethylene terephthalate, polyethylene naphthalate, polycarbonate, polystyrene, polyethylene, polypropylene, polyphenylene sulfide, polyvinylidene fluoride, tetraacetyl cellulose, brominated phenoxy, aromatic polyamides, polyimides, polystyrenes, polyarylates, polysulfones, polyolefins, etc. In a specific embodiment, both the first substrate 101 and the second substrate 102 can be glass substrates.

[0177] In some embodiments, before the second substrate 102 is disposed on the second battery 15 , the other end of the at least one first lead wire 14 is connected to the second bus bar 17 .

[0178] For details, see again Figure 30 In some embodiments, the first sealing layer 23 also covers at least a portion of the first lead 14; the method further includes: forming an opening S1 on the first sealing layer 23 that penetrates the first sealing layer 23; see again Figure 30 、 Figure 3 、 Figure 4 as well as Figure 31Connecting at least one first bus bar 13 to the second bus bar 17 includes: leading the end of at least one first lead wire 14 away from the first bus bar 13 out of the opening S1 and connecting it to the second bus bar 17. That is, a portion of the first lead wire 14 passes through the opening S1, is laid on the side of the first sealing layer 23 away from the first substrate 101, and is connected to the second bus bar 17. In this way, at least one first bus bar 13 and the second bus bar 17 are interconnected within the battery assembly.

[0179] In actual operation, first, Figure 30 Before placing the second battery 15 on the first sealing layer 23, at least one end of the first lead wire 14 away from the first bus bar 13 can be led out from the opening S1; then, after placing the second battery 15 on the first sealing layer 23, the end of the first lead wire 14 away from the first bus bar 13 can be connected to the second bus bar 17 to form a Figure 3 、 Figure 4 as well as Figure 31 The structure shown.

[0180] In practice, the end of the first lead wire 14 away from the first bus bar 13 can be overlapped and welded to the upper surface or side surface of the second bus bar 17. However, the present invention is not limited thereto. The end of the first lead wire 14 away from the first bus bar 13 can also be welded to the lower surface of the second bus bar 17. In some embodiments, the second lead wire 18 can also be welded to the first lead wire 14 and connected to the second bus bar 17.

[0181] In some embodiments, the two first lead-out lines 14 are respectively arranged at the two side edges of the first battery 11 along the second direction and extend toward the middle area of the first battery 11, and the two first lead-out lines 14 are respectively connected to the two second bus bars 17 located at the edges along the second direction to realize the parallel connection of the first battery 11 and the second battery 15 inside the battery assembly.

[0182] Figure 5 The opening S1 shown in FIG is located on both sides of the plurality of second bus bars 17 along the second direction. However, the present invention is not limited thereto, and the opening S1 may also be located between two adjacent second bus bars 17, and the end of the first lead wire 14 away from the first bus bar 13 may also be connected to another second bus bar 17 located between two second bus bars 17 at the edge along the second direction.

[0183] In some embodiments of the present application, a first bus bar 13 electrically connected to the first battery 11 and a second bus bar 17 electrically connected to the second battery 15 are located inside the battery assembly, and at least one of the first bus bar 13 and the second bus bar 17 are electrically connected inside the battery assembly through a first lead wire 14. In this way, for the first bus bar 13 electrically connected to the second bus bar 17, there is no need to additionally set a lead wire that needs to be led out of the assembly to be connected separately thereto, and there is no need to additionally punch holes on the second substrate 102 to lead out the lead wire that is separately connected to the first bus bar 13, thereby improving the mechanical properties of the battery assembly and simplifying the manufacturing process of the battery assembly, which is conducive to the rapid mass production of laminated battery assemblies.

[0184] Figure 31 as well as Figures 3 to 5 The end portion of at least one first lead wire 14 extending from the opening S1 is connected to the second bus bar 17 , so as to realize electrical connection between the at least one first bus bar 13 and the second bus bar 17 inside the assembly.

[0185] But not limited to this, in some embodiments, the method also includes: leading out one end of at least one first lead-out wire 14 away from the first bus bar 13 from the through hole S3, and leading out one end of the first lead-out wire 14 away from the first bus bar 13 and one end of at least one second lead-out wire 18 away from the second bus bar 17 from the same through hole S3, so that at least one first bus bar 13 and the second bus bar 17 are independently arranged inside the battery assembly.

[0186] Specifically, leading the other end of the at least one first lead-out wire 14 out from the through hole S3 includes leading one end of the at least one first lead-out wire 14 away from the first bus bar 13 out from the opening S1 and the through hole S3 .

[0187] In actual operation, first, after the end of the first lead wire 14 away from the first bus bar 13 is led out from the opening S1 of the first sealing layer 23, the second battery 15 is placed on the first battery 11; then, the end of at least one first lead wire 14 away from the first bus bar 13 is led out from the opening S1 to form a Figures 11 to 12 as well as Figure 32 Next, the second substrate 102 is placed on the second battery 15, and the first lead wire 14 is led out from the opening S1 at one end through the through hole S3 to form a Figure 13 The structure shown.

[0188] In some embodiments of the present application, at least one first lead-out wire 14 at one end away from the first bus bar 13 and at least one second lead-out wire 18 at one end away from the second bus bar 17 are led out from the same through hole S3. In this way, there is no need to punch additional holes to lead out the first lead-out wire 14 separately, thereby improving the mechanical properties of the battery assembly and simplifying the manufacturing process of the battery assembly, which is conducive to the rapid mass production of laminated battery assemblies.

[0189] In some embodiments of the present application, at least one first lead-out wire 14 at one end away from the first bus bar 13 and at least one second lead-out wire 18 at one end away from the second bus bar 17 are led out from the same through hole S3. In this way, there is no need to punch additional holes to lead out the first lead-out wire 14 separately, thereby improving the mechanical properties of the battery assembly and simplifying the manufacturing process of the battery assembly, which is conducive to the rapid mass production of laminated battery assemblies.

[0190] In some embodiments, the opening S1 can be located between two adjacent second bus bars 17, and the ends of the two adjacent second bus bars 17 near the opening S1 are respectively connected to the second lead wire 18. The other end of the first lead wire 14 led out from the opening S1 and the other end of the second lead wire 18 connected to the end of the second bus bar 17 near the opening S1 are led out from the same through hole S3. In this way, the first lead wire 14 and the two adjacent second lead wires 18 are led out from the same through hole S3 and can be introduced into the same junction box, further reducing the number of holes punched in the second substrate 102 and simplifying the battery assembly manufacturing process. The first lead wire 14 leading out of the battery assembly can be connected to the second lead wire 18, or it can be set independently of the second lead wire 18.

[0191] like Figures 11 to 14 As shown, in some embodiments, the number of the first lead-out wires 14 is two, one end of the two first lead-out wires 14 is electrically connected to the positive electrode and the negative electrode of the first battery 11 respectively through the first bus bar 13, and the other end is led out from different through holes S3 respectively. In this way, the circuit of the first battery 11 and the circuit of the second battery 15 are independently arranged inside the component.

[0192] However, the present invention is not limited thereto. In some embodiments, the other end of part of the first lead wires 14 can be connected to the second bus bar 17, and the other end of part of the first lead wires 14 can be led out from the through hole S3, which can be used to realize series connection, parallel connection or mixed connection of multiple first sub-batteries 12 and multiple second sub-batteries 16.

[0193] See again Figure 29 In some embodiments, the first lead 14 includes a first sub-portion 141; in some embodiments, the method further includes: forming a first insulating layer 22, the first insulating layer 22 being located on a side of the first sub-portion 141 facing the first battery 11 and covering at least a portion of the first battery 11 covered by the first sub-portion 141; Figure 31 and Figure 32 As shown, after one end of at least one first lead-out wire 14 away from the first bus bar 13 is led out from the opening S1, the first sub-portion 141 is located on the side of the first sealing layer 23 facing the first substrate 101, and the first insulating layer 22 is located between the first sub-portion 141 and the first battery 11. In this way, the first insulating layer 22 electrically isolates the first lead-out wire 14 and the first battery 11 to avoid the risk of short circuit.

[0194] In some embodiments, the first sub-portion 141 and the first insulating layer 22 may extend in a straight line along the third direction. However, the present invention is not limited thereto and the first sub-portion 141 and the first insulating layer 22 may also extend in a straight line along other directions, or along a curve or a broken line to increase the applicability of different scenarios.

[0195] However, the present invention is not limited to this, and the first lead-out line 14 may also not be provided with the first sub-portion 141, and the opening S1 may be located above the first bus bar 13, one end of the first lead-out line 14 is located in the opening S1 and connected to the first bus bar 13 located below the opening S1, and the other end is located on the side of the first sealing layer 23 away from the first battery 11, and is connected to the second bus bar 17 or led out from the through hole S3. In this way, the first lead-out line 14 and the first battery 11 are separated by the first sealing layer 23, and there is no need to additionally provide the first insulating layer 22.

[0196] like Figure 30 As shown, in some embodiments, the first sealing layer 23 may completely cover the first battery 11, the first bus bar 13, and the first sub-portion 141. The sidewalls of the first sealing layer 23 may be substantially flush with the sidewalls of the first battery 11, or may protrude outward from the sidewalls of the first battery 11. However, the present invention is not limited thereto. The first sealing layer 23 may also partially cover the first battery 11, and in the second direction, at least one side edge of the first sealing layer 23 may be retracted inward relative to the edge of the first battery 11. The first sealing layer 23 may cover a portion of the first bus bar or a portion of the first sub-portion 141.

[0197] See again Figure 5 and Figure 6 as well as Figure 13 In some embodiments, after placing the second battery 15 on the first battery 11 and before placing the second substrate 102 on the second battery 15, the method further includes: forming a second sealing layer 24, the second sealing layer 24 is located between the second battery 15 and the second substrate 102, and covers the first battery 11, the second battery 15, the first bus bar 13 and the second bus bar 17, the first lead wire 14 and / or the second lead wire 18 passes through the second sealing layer 24 in a vertical direction and is led out from the through hole S3.

[0198] The materials of the first sealing layer 23 and the second sealing layer 24 are as described above and will not be repeated here.

[0199] Continue to see Figure 5 and Figure 6 as well as Figure 13 In some embodiments, the edges of the first battery 11 and the second battery 15 are indented inward relative to the edges of the first substrate 101 and the second substrate 102. Before placing the second substrate 102 on the second battery 15, the method further includes forming a third sealing layer 25, the third sealing layer 25 being disposed along the edges of the first substrate 101 and the second substrate 102. The third sealing layer 25 seals the second substrate 102 and the first substrate 101 together. The material of the third sealing layer 25 includes, but is not limited to, butyl rubber.

[0200] like Figure 33 As shown, in some other embodiments of the present application, at least one side edge of the first sealing layer 23 has a notch S2, at least part of the first bus bar 13 is exposed by the notch S2, and one end of at least one first lead wire 14 is connected to the first bus bar 13 exposed by the notch S2. Figure 33 The structure shown in FIG. 1 executes step S102 and step S103 to form the following Figures 15 to 17 The structure shown in FIG. Connecting the other end of at least one first lead wire 14 to the second bus bar 17 includes: leading the first lead wire 14 out of the notch S2, laying it on the surface of the first sealing layer 23 on the side away from the first battery 11, and connecting the end of the first lead wire 14 away from the notch S2 to the second bus bar 17. This eliminates the need to form an opening S1 in the first sealing layer 23, omitting the process of inserting the first lead wire 14 through the opening S1. Furthermore, the first lead wire 14 is separated from the first battery 11 by the first sealing layer 23, eliminating the need for the first insulating layer 22, further simplifying the manufacturing process of the battery assembly.

[0201] In some embodiments, the first bus bar 13 may be formed first, followed by forming a first sealing layer 23 having a notch S2 exposing the first bus bar 13 , and then forming a first lead wire 14 on the first sealing layer 23 with one end connected to the first bus bar 13 exposed by the notch S2 .

[0202] In some embodiments, the notch S2 is located at both side edges of the first sealing layer 23 along the second direction, the first lead wire 14 extends toward the middle area of the first battery 11 along the second direction, and is connected to the second bus bar 17 located at the edge along the second direction.

[0203] In practice, the first bus bar 13 may be a structure that continuously extends along the fourth direction below the first sealing layer 23, with only a portion of the first bus bar 13 exposed by the notch S2. However, the present invention is not limited thereto, and the first bus bar 13 may also be a structure that is disposed within the notch S2 and has a shorter extension length.

[0204] like Figure 34 as well as Figures 18 to 20 As shown, in some further embodiments of the present application, in the second direction, at least one side edge of the first sealing layer 23 may be retracted inward relative to the edge of the first battery 11, and at least one first bus bar 13 is located on at least one side of the first sealing layer 23 along the second direction and spaced apart from the first sealing layer 23. The manufacturing method further includes forming a second insulating layer 26, which is located between the first bus bar 13 and the first sealing layer 23 and covers a portion of the first battery 11. At least one first lead wire 14 is formed on a surface of the second insulating layer 26 and the first sealing layer 23 facing away from the first battery 11, with one end connected to the first bus bar 13 located on at least one side of the first sealing layer 23 along the second direction and the other end connected to the second bus bar 17. In this manner, there is no need to form an opening S1 in the first sealing layer 23, and the process of inserting the first lead wire 14 through the opening S1 is omitted, further simplifying the manufacturing process of the battery assembly. The first lead wire 14 is separated from the first battery 11 by the first sealing layer 23 and the second insulating layer 26, thereby avoiding the risk of short circuit.

[0205] Specifically, such as Figure 34 As shown, before or after forming the first sealing layer 23, a first bus bar 13 located on at least one side of the first sealing layer 23 along the second direction and a first lead wire 14 connected to the first bus bar 13 can be formed, and a second insulating layer 26 can be formed under part of the first lead wire 14; then, Figure 34 The structure shown in FIG. 1 executes step S102 and step S103 to form the following Figures 18 to 20 The structure shown.

[0206] In some embodiments, in the second direction, both side edges of the first sealing layer 23 are indented inward relative to the edge of the first battery 11, the two first bus bars 13 are located on both sides of the first sealing layer 23 along the second direction, and the two first lead wires 14 are respectively connected to the second bus bars 17 located on the two side edges along the second direction.

[0207] like Figure 35 as well as Figures 21 to 23As shown, in some embodiments, at least one first bus bar 13 is located on at least one side of the first sealing layer 23 along the second direction and contacts the first sealing layer 23, and at least one first lead wire 14 is formed on the side of the first sealing layer 23 away from the first battery 11, with one end connected to the first bus bar 13 located on one side of the first sealing layer 23 along the second direction, and the other end connected to the second bus bar 17; in this way, there is no need to form an opening S1 in the first sealing layer 23, and the process of inserting the first lead wire 14 through the opening S1 is omitted, and the first lead wire 14 is separated from the first battery 11 by the first sealing layer 23, and there is no need to additionally set the second insulating layer 26, which further simplifies the manufacturing process of the battery assembly.

[0208] Specifically, such as Figure 35 As shown, a first bus bar 13 located at at least one side of the first sealing layer 23 along the second direction and a first lead wire 14 connected to the first bus bar 13 can be formed before or after forming the first sealing layer 23. Figure 35 The structure shown in FIG. 1 executes step S102 and step S103 to form the following Figures 21 to 23 The structure shown.

[0209] Figures 3 to 5 、 Figures 15 to 17 、 Figures 18 to 20 as well as Figures 21 to 23 The structure shown provides different connection methods for the first bus bar 13 and the second bus bar 17 respectively. Any first bus bar 13 can be connected to the second bus bar 17 in any method, and multiple first bus bars 13 can be connected to the second bus bar 17 in the same or different methods.

[0210] Figures 3 to 23 In the battery assembly shown, the plurality of second bus bars 17 and the first lead wires 14 are located in the middle area of the battery assembly. Figure 24 and Figure 27 As shown, in some other embodiments of the present application, the plurality of second bus bars 17 and the first lead wires 14 may also be located in the end region of the battery assembly in the first direction.

[0211] Specifically, such as Figures 3 to 23 As shown, in some embodiments, when the plurality of second bus bars 17 are located between the first battery group Z1 and the second battery group Z2, the orthographic projection of the first lead wire 14 on the plane where the second battery 15 is located is located between the first battery group Z1 and the second battery group Z2. Figure 24 and Figure 27As shown, when multiple second bus bars 17 are arranged along the first direction on one side of the second battery 15 in the first direction, the orthographic projection of the first lead wire 14 on the plane where the second battery 15 is located is located on the same side of the second battery 15 in the first direction as the second bus bar 17. That is, in the present application, the first lead wire 14 and the second bus bar 17 are arranged in the same area of the battery assembly. This makes it easy to lead the first lead wire 14 to the vicinity of the second bus bar 17, thereby facilitating its connection with the second bus bar 17, or to facilitate the first lead wire 14 and the second lead wire 18 connected to the second bus bar 17 to pass through the same through hole S3, thereby reducing the process complexity of the first lead wire 14 and simplifying the manufacturing process of the battery assembly.

[0212] Figure 25 The first lead wire 14 shown in FIG is located on the side of the first battery 11 away from the first substrate 101 , and the orthographic projection of the first lead wire 14 on the plane of the first substrate 101 falls within the orthographic projection of the first battery 11 on the plane of the first substrate 101 .

[0213] However, the present invention is not limited thereto, and the first lead wire 14 can also be arranged at other locations. Figure 26 As shown, in some other embodiments of the present application, the first lead wire 14 is arranged on one side of the first battery 11 along the first direction, and part of the first bus bar 13 protrudes from the edge of the first battery 11 along the first direction and is connected to the first lead wire 14.

[0214] In some embodiments of the present application, when multiple second bus bars 17 and the first lead wire 14 are located in the end area of the battery assembly in the first direction, the end of the first lead wire 14 away from the first bus bar 13 can be connected to the second bus bar 17 or led out from the through hole S3 in the same manner as described above, which will not be repeated here.

[0215] The above embodiments are intended only to illustrate the technical solutions of the present application, and are not intended to limit them. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they may still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. Such modifications or replacements do not deviate from the essence of the corresponding technical solutions within the scope of the technical solutions of the embodiments of the present application, and they should all be included within the scope of the specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments may be combined in any manner.

Claims

1. A battery assembly, characterized in that: include: a first substrate, a second substrate located on the first substrate, a first battery located between the first substrate and the second substrate, and a second battery located between the first battery and the second substrate; The second substrate has at least one through hole penetrating the second substrate; a plurality of first bus bars electrically connected to the first battery and a plurality of second bus bars electrically connected to the second battery, located between the first substrate and the second substrate; a plurality of first lead wires, one end of each of the first lead wires being connected to the first bus bar; at least one second lead wire, one end of the second lead wire being connected to the second bus bar and the other end being led out from the through hole; The orthographic projection of the first lead wire on the plane where the second battery is located and the second bus bar are located on the same side of the second battery in the first direction, or the second battery includes a first battery group and a second battery group arranged at intervals along the first direction, and the orthographic projection of the first lead wire on the plane where the second battery is located and the second bus bar are located between the first battery group and the second battery group; the first direction is parallel to the plane of the first substrate; a first sealing layer, located on a side of the second battery and the second bus bar facing the first battery and covering at least a portion of the first battery, the first sealing layer having at least one opening penetrating the first sealing layer; The opening is located between two adjacent second bus bars; wherein, The other end of at least one of the first lead wires is led out from the opening and connected to the second bus bar; and / or, The other end of at least one of the first lead wires is led out from the opening and the through hole, and the other end of the first lead wire and the other end of at least one of the second lead wires are led out from the same through hole.

2. The battery assembly according to claim 1, wherein: At least one of the first lead wires includes a first sub-portion, the first sub-portion is located on a side of the first sealing layer facing the first substrate and connected to the first bus bar, and the first sub-portion covers a portion of the first battery; The battery assembly further includes a first insulating layer, which is located on a side of the first sub-section facing the first battery and covers at least a portion of the first battery covered by the first sub-section.

3. The battery assembly according to claim 1, wherein: A plurality of second bus bars extend along the second direction and are arranged at intervals along the second direction, and the ends of two adjacent second bus bars near the opening are connected to the second lead wire, and the other end of the second lead wire led out from the opening and the other end of the first lead wire connected to the end of the second bus bar near the opening are led out from the same through hole; the second direction intersects with the first direction and is parallel to the plane of the first substrate.

4. The battery assembly according to claim 1, wherein: In the second direction, at least one side edge of the first sealing layer has a notch, at least part of the first bus bar is exposed by the notch, and at least one first lead wire is located on a surface of the first sealing layer away from the first battery, one end of which is connected to the first bus bar exposed by the notch, and the other end of which is connected to the second bus bar; the second direction intersects with the first direction and is parallel to the first substrate plane.

5. The battery assembly according to claim 1, wherein: At least one of the first bus bars is located on at least one side of the first sealing layer along a second direction and is spaced apart from the first sealing layer, wherein the second direction intersects the first direction and is parallel to the first substrate plane; The battery assembly further comprises: a second insulating layer, wherein the second insulating layer is located between the first bus bar and the first sealing layer and covers a portion of the first battery; at least one first lead wire is located on a side of the first sealing layer and the second insulating layer facing away from the first battery; one end is connected to the first bus bar located on a side of the first sealing layer along the second direction, and the other end is connected to the second bus bar.

6. The battery assembly according to claim 1, wherein: At least one of the first bus bars is located on at least one side of the first sealing layer along the second direction and contacts the first sealing layer, and at least one of the first lead wires is located on a side of the first sealing layer away from the first battery, with one end connected to the first bus bar located on one side of the first sealing layer along the second direction, and the other end connected to the second bus bar; the second direction intersects with the first direction and is parallel to the first substrate plane.

7. The battery assembly according to claim 1, wherein: A plurality of the second bus bars are arranged on one side of the second battery along the first direction and are spaced apart along the second direction; or a plurality of the second bus bars are arranged between the first battery group and the second battery group and are spaced apart along the second direction; The second direction intersects the first direction and is parallel to the first substrate plane.

8. The battery assembly according to claim 1, wherein: The first cell includes a thin-film solar cell, which includes a light-absorbing layer, and the light-absorbing layer includes one or more of a perovskite light-absorbing layer, an amorphous silicon light-absorbing layer, a copper indium gallium selenide light-absorbing layer, a cadmium telluride light-absorbing layer, a gallium arsenide light-absorbing layer, and an organic dye light-absorbing layer; and / or the second cell includes a crystalline silicon solar cell.

9. A method for manufacturing a battery assembly, characterized in that: include: Providing a first substrate, forming a first battery on the first substrate, and forming a plurality of first bus bars and a plurality of first lead wires, wherein the first bus bars are electrically connected to the first battery, and one end of the first lead wire is connected to the first bus bar; Providing a second battery, placing the second battery on the first battery, and forming a plurality of second bus bars and at least one second lead wire, wherein the second bus bar is electrically connected to the second battery, and one end of the second lead wire is connected to the second bus bar; The orthographic projection of the first lead wire on the plane where the second battery is located and the second bus bar are both located on the same side of the second battery in the first direction, or the second battery includes a first battery group and a second battery group arranged at intervals along the first direction, and the orthographic projection of the first lead wire on the plane where the second battery is located and the second bus bar are both located between the first battery group and the second battery group; the first direction is parallel to the plane of the first substrate; forming a first sealing layer, wherein the first sealing layer is located on a side of the second battery and the second bus bar facing the first battery and covers at least a portion of the first battery; An opening penetrating the first sealing layer is formed on the first sealing layer, and the opening is located between two adjacent second bus bars; A second substrate is provided, and the second substrate is disposed on the second battery, wherein the second substrate has at least one through hole penetrating the second substrate, and the other end of the second lead wire is led out from the through hole; wherein, Before placing the second substrate on the second battery, leading the other end of at least one of the first lead wires out from the opening and connecting it to the second bus bar; and / or, After the second substrate is disposed on the second battery, the other end of at least one first lead wire is led out from the opening and the through hole, and the other end of the first lead wire and the other end of at least one second lead wire are led out from the same through hole.

10. The manufacturing method according to claim 9, characterized in that: The first sealing layer also covers at least a portion of the first lead wire.

11. The manufacturing method according to claim 9, characterized in that: At least one of the first leads includes a first subsection; Before forming the first sealing layer, the method further includes: forming a first insulating layer, the first insulating layer being located on a side of the first sub-portion facing the first battery and covering at least a portion of the first battery covered by the first sub-portion, and after leading out the end of the first lead wire away from the first bus bar from the opening, the first sub-portion and the first insulating layer are located on a side of the first sealing layer facing the first substrate.

12. The manufacturing method according to any one of claims 9 to 11, characterized in that: A notch is formed on at least one side edge of the first sealing layer along the second direction, at least a portion of the first bus bar is exposed by the notch, and one end of at least one first lead wire is connected to the first bus bar exposed by the notch; Connecting the other end of at least one of the first lead wires to the second bus bar includes: leading the first lead wire out from the notch, laying it on the surface of the first sealing layer away from the first battery, and connecting the end of the first lead wire away from the notch to the second bus bar.

13. The manufacturing method according to claim 9, characterized in that At least one of the first bus bars is located on at least one side of the first sealing layer along a second direction and is spaced apart from the first sealing layer, wherein the second direction intersects the first direction and is parallel to the first substrate plane; the method further includes: A second insulating layer is formed, where the second insulating layer is located between the first bus bar and the first sealing layer and covers a portion of the first battery. At least one first lead wire is formed on a side of the first sealing layer and the second insulating layer facing away from the first battery, with one end connected to the first bus bar located on one side of the first sealing layer along the second direction, and the other end connected to the second bus bar.

14. The manufacturing method according to claim 9, characterized in that At least one of the first bus bars is located on at least one side of the first sealing layer along the second direction and contacts the first sealing layer, at least the first lead wire is formed on a side of the first sealing layer facing away from the first battery, one end is connected to the first bus bar located on one side of the first sealing layer along the second direction, and the other end is connected to the second bus bar; the second direction intersects with the first direction and is parallel to the first substrate plane.

15. An electrical device, characterized in that: The electrical device comprises the battery assembly according to any one of claims 1 to 8 for providing electrical energy.

16. A power generation device, characterized in that: The power generation device comprises the battery assembly according to any one of claims 1 to 8.

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