Laminated battery

Abstract

The utility model relates to the technical field of batteries, and discloses a laminated battery, which comprises a first back plate and a second back plate, the thin film battery is arranged on the first back plate, and the orthographic projection of the thin film battery on the first back plate is located in the range of the first back plate; the first adhesive film is stacked on the thin film battery; the crystalline silicon assembly is stacked on the first adhesive film, the crystalline silicon assembly comprises a plurality of battery piece sets, each battery piece set is formed by connecting a plurality of sub battery pieces in series, and every two adjacent sub battery pieces are arranged in an end-to-end staggered and overlapped mode. According to the utility model, the first adhesive film is additionally arranged between the crystalline silicon assembly and the thin film battery, so that the thin film battery can be effectively prevented from being damaged by the crystalline silicon assembly, and meanwhile, gaps of the crystalline silicon assembly can be filled through the meltability of the first adhesive film, so that the crystalline silicon assembly is prevented from being broken in the laminating process; according to the laminated battery, the sub-battery pieces are staggered and overlapped end to end, so that more sub-battery pieces can be arranged in the battery piece group, the power generation area is increased, the light loss is reduced, and the power generation efficiency of the laminated battery is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and particularly relates to a laminated battery. Background Art

[0002] A solar cell is a device that directly converts light energy into electrical energy through the photovoltaic effect or the photochemical effect. Solar cells include perovskite solar cells, crystalline silicon solar cells, etc. At present, the photoelectric conversion efficiency of perovskite solar cells can be comparable to that of crystalline silicon solar cells with crystalline silicon components. In addition, since the perovskite bandgap is adjustable and can be made into a semi-transparent component, after combining perovskite with a crystalline silicon component to form a laminated battery, the photoelectric conversion efficiency of the laminated battery can be increased by more than 30%.

[0003] In the related art, due to the existence of solder joints and wires on the surface of the crystalline silicon component, when laminating and encapsulating the laminated battery, it is easy to damage the thin-film battery. Moreover, the current arrangement method of the crystalline silicon component is an array arrangement of multiple battery chips, and the distance between the battery chips is relatively large, resulting in too small an actual power generation area of the crystalline silicon component in the laminated battery and certain light loss, thus making the power generation efficiency of the laminated battery low. Summary of the Utility Model

[0004] In view of this, the utility model provides a laminated battery to solve the problems that the solder joints and wires on the surface of the crystalline silicon component damage the thin-film battery, and the power generation area of the crystalline silicon component in the laminated battery is too small and there is light loss.

[0005] The utility model provides a laminated battery, comprising:

[0006] A first backplane;

[0007] A thin-film battery, which is arranged on the first backplane, and the orthographic projection of the thin-film battery on the first backplane is located within the range of the first backplane;

[0008] A first adhesive film, which is stacked on the thin-film battery;

[0009] A crystalline silicon component, which is stacked on the first adhesive film. The crystalline silicon component includes several groups of battery chip groups, and each group of battery chip groups is composed of several sub-battery chips connected in series, and adjacent two sub-battery chips are arranged in a head-to-tail staggered overlapping manner.

[0010] Beneficial effects: First, a first backplane is provided, and the thin-film battery is disposed on the first backplane, and the size of the thin-film battery is smaller than that of the first backplane; then the first adhesive film and the crystalline silicon component are sequentially stacked on the thin-film battery. By adding the first adhesive film between the crystalline silicon component and the thin-film battery, it can effectively prevent the crystalline silicon component from damaging the thin-film battery. At the same time, the molten property of the first adhesive film can be used to fill the gaps of the crystalline silicon component, preventing the crystalline silicon component from cracking during lamination, thereby affecting the performance of the laminated component. The crystalline silicon component includes several groups of battery cell groups, and each group of battery cell groups is composed of several sub-battery cells connected in series, and adjacent two sub-battery cells are arranged in a head-to-tail staggered overlapping manner. By arranging the sub-battery cells in a head-to-tail staggered overlapping manner, light loss can be reduced, and more sub-battery cells can be arranged in the battery cell group or the area of the sub-battery cells can be increased to increase the power generation area, thereby improving the power generation efficiency of the laminated battery; at the same time, due to the overlapping arrangement of the sub-battery cells, the solder joints in the sub-battery cells can be kept away from the thin-film battery, thereby avoiding damage to the thin-film battery by the solder joints during lamination and improving the overall reliability and product yield.

[0011] In an optional embodiment, polar ends are respectively provided on the top end face and the bottom end face of the sub-battery cell; the polar end at the top of one sub-battery cell is electrically connected to the polar end at the bottom of another adjacent overlapping sub-battery cell.

[0012] Beneficial effects: By respectively providing polar ends on the top end face and the bottom end face of the sub-battery cell to determine the inflow direction and the outflow direction of the current in the sub-battery cell, and the polar ends can be used to effectively connect and combine the sub-battery cell with other sub-battery cells or an external circuit. Electrically connecting the polar end at the top of one sub-battery cell to the polar end at the bottom of another adjacent overlapping sub-battery cell enables the current to be sequentially transmitted between the sub-battery cells in the battery cell group, thereby forming a complete circuit, which can improve the performance, efficiency and reliability of the laminated battery.

[0013] In an optional embodiment, the polar end is disposed within the overlapping area of two adjacent sub-battery cells.

[0014] Beneficial effects: In the crystalline silicon component, the sub-battery cells in each group of battery cell groups are closely arranged. By disposing the polar end within the overlapping area of two adjacent sub-battery cells, the usage space of the sub-battery cells can be better utilized, making the structure of the entire crystalline silicon component more compact. At the same time, disposing the polar end within the overlapping area of two adjacent sub-battery cells can increase the aesthetic property of the crystalline silicon component.

[0015] In an optional embodiment, the polar end is disposed outside the overlapping area of two adjacent sub-battery cells.

[0016] Beneficial effects: By setting the polar ends outside the overlapping regions of adjacent sub-cell wafers, it is beneficial to connect the polar ends to the sub-cell wafers, increasing the convenience of operation.

[0017] In an alternative embodiment, the polar ends are one or more solder joints.

[0018] Beneficial effects: In crystalline silicon solar cells, each sub-cell wafer itself includes a number of electrode sub-grid lines and electrode main-grid lines. The electrode grid lines of adjacent sub-cell wafers can be directly electrically connected in one-to-one correspondence, or the main-grid lines of adjacent sub-cell wafers can be electrically connected to each other.

[0019] In an alternative embodiment, several groups of the cell wafer groups are arranged at intervals, and adjacent two groups of the cell wafer groups are connected in series.

[0020] Beneficial effects: By arranging several groups of cell wafer groups at intervals, heat conduction between the cell wafer groups can be reduced, preventing local overheating, thereby improving the stability and reliability of the entire laminated solar cell; moreover, it can also provide space for wiring and connection, facilitating the connection between each cell wafer group. Connecting adjacent two groups of cell wafer groups in series enables the current to pass through each cell wafer group in sequence, increasing the output voltage of the laminated solar cell to meet the requirements of specific loads.

[0021] In an alternative embodiment, it further includes a second encapsulant film, laminated on the crystalline silicon module;

[0022] A second backsheet, laminated on the second encapsulant film, and the orthographic projection of the second backsheet on the first backsheet coincides with the first backsheet.

[0023] Beneficial effects: By laminating the second encapsulant film on the crystalline silicon module, the second encapsulant film is in full contact with the crystalline silicon module, so as to better protect the crystalline silicon module and ensure the performance and stability of the crystalline silicon module. Further laminating the second backsheet on the second encapsulant film and making the size of the second backsheet match that of the first backsheet, so that it can completely cover the crystalline silicon module and other components, can provide mechanical support and protection for the crystalline silicon module, improving the reliability and performance of the laminated solar cell.

[0024] In an alternative embodiment, it further includes a sealant, the sealant is arranged between the first backsheet and the second backsheet, and the sealant is arranged in the edge regions of the first backsheet and the second backsheet. The first backsheet, the second backsheet and the sealant together form a sealing cavity for sealing the thin-film solar cell, the first encapsulant film, the crystalline silicon module and the second encapsulant film.

[0025] Beneficial effects: The sealant is disposed between the first backplane and the second backplane and at the edge regions of the first backplane and the second backplane, thereby filling the gap between the first backplane and the second backplane and ensuring that impurities such as moisture and oxygen in the external environment do not enter the laminated cell. A sealing cavity for sealing the thin-film battery, the first encapsulant film, the crystalline silicon component, and the second encapsulant film is formed by the first backplane, the second backplane, and the sealant, which can effectively prevent impurities such as moisture and dust in the external environment from entering the laminated cell, thereby protecting the thin-film battery, the first encapsulant film, the crystalline silicon component, and the second encapsulant film from damage, effectively improving the reliability and stability of the laminated cell, and extending its service life.

[0026] In an alternative embodiment, the thickness of the first encapsulant film is greater than the thickness of the sub-cell.

[0027] Beneficial effects: When the laminated cell is slightly impacted, the thicker first encapsulant film can better buffer the external impact force, reduce the direct impact on the sub-cell, and reduce the risk of damage to the sub-cell; moreover, it can also improve the bonding strength with the sub-cell and other components, contributing to improving the overall performance and reliability of the laminated cell; at the same time, since several sub-cells are stacked, steps will be generated at the overlapping positions. The thicker first encapsulant film can completely fill the steps and avoid damage to the underlying thin-film battery by the cell.

[0028] In an alternative embodiment, the thin-film battery includes any one of a perovskite thin-film battery, a copper indium gallium selenide thin-film battery, and a cadmium telluride thin-film battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0030] Figure 1 A schematic diagram of a laminated cell according to an embodiment of the present invention;

[0031] Figure 2 A schematic diagram of the stacking of the crystalline silicon components in a laminated cell according to an embodiment of the present invention;

[0032] Figure 3 A schematic diagram of the distribution and arrangement of the crystalline silicon components in a laminated cell according to an embodiment of the present invention;

[0033] Figure 4 A schematic diagram of the thin-film battery in a laminated cell according to an embodiment of the present invention.

[0034] Description of the reference numerals in the drawings:

[0035] 100, the first backplane; 200, the thin-film battery; 210, the transparent conductive layer; 220, the first charge transport layer; 230, the perovskite layer; 240, the second charge transport layer; 250, the back electrode layer; 300, the first encapsulant film; 400, the crystalline silicon module; 410, the cell group; 411, the sub-cell; 412, the polar end; 413, the wire; 414, the connecting wire; 500, the second encapsulant film; 600, the second backplane; 700, the sealant. Specific embodiments

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0037] The following will be combined with Figures 1 to 4 to describe the embodiments of the present utility model.

[0038] According to an embodiment of the present utility model, on the one hand, with reference to Figures 1 to 3 there is provided a laminated battery, including: a first backplane 100; a thin-film battery 200 disposed on the first backplane 100, and the orthographic projection of the thin-film battery 200 on the first backplane 100 is within the range of the first backplane 100; a first encapsulant film 300 laminated on the thin-film battery 200; a crystalline silicon module 400 laminated on the first encapsulant film 300, and the crystalline silicon module 400 includes a plurality of groups of cell groups 410, and each group of cell groups 410 is composed of a plurality of sub-cells 411 connected in series, and adjacent two sub-cells 411 are arranged in a head-to-tail staggered overlapping manner.

[0039] In this embodiment, the first backplane 100 may be a first glass backplane; the thin-film battery 200 is coated on the first glass backplane to integrally form the thin-film battery 200 with the first glass backplane; so that the thin-film battery 200 is tightly combined with the first glass backplane, and the overall structure is more stable. Then, laser edge cleaning is performed around the first glass backplane according to a preset edge cleaning distance to remove the excess materials and impurities around the thin-film battery 200, ensuring that the edge of the thin-film battery 200 is neat and smooth, improving the appearance quality and performance stability of the thin-film battery 200, and also ensuring that the orthographic projection of the thin-film battery 200 on the first glass backplane is within the range of the first glass backplane. Among them, the edge cleaning distance can be set according to actual use requirements and will not be specifically limited here.

[0040] Further stack the first adhesive film 300 and the crystalline silicon component 400 on the thin-film battery 200 in sequence. Among them, the size of the first adhesive film 300 is larger than the sizes of the crystalline silicon component 400 and the thin-film battery 200. By adding the first adhesive film 300 between the crystalline silicon component 400 and the thin-film battery 200, it can effectively prevent the crystalline silicon component 400 from damaging the thin-film battery 200. At the same time, it can also fill the gaps of the crystalline silicon component 400 through the fusibility of the first adhesive film 300 to prevent the crystalline silicon component 400 from cracking during the lamination process, thereby affecting the performance of the laminated component. The crystalline silicon component 400 is composed of several groups of battery chip groups 410. Each group of battery chip groups 410 is composed of several sub-battery chips 411 connected in series, and the adjacent two sub-battery chips 411 are arranged in a head-to-tail offset and overlapping manner. Among them, the specific number of the battery chip groups 410 can be 2 groups, 3 groups, 4 groups, etc.; the number of sub-battery chips 411 in each group of battery chip groups 410 can be 2, 3, 4, etc.; the number of the battery chip groups 410 and the number of sub-battery chips 411 in each group of battery chip groups 410 can be determined according to the actual usage requirements, and no specific restrictions are imposed thereon. By arranging the sub-battery chips 411 in a head-to-tail offset and overlapping manner, the utilization of sunlight can be made more concentrated. Compared with the non-overlapping welding method, the overlapping welding arrangement of the sub-battery chips 411 can have a higher utilization rate of solar energy and a smaller light conversion efficiency, reducing light loss. Moreover, through the overlapping welding method, more sub-battery chips 411 can be arranged in the battery chip group 410 or the area of the sub-battery chips 411 can be increased to increase the power generation area, thereby also improving the power generation efficiency of the laminated battery; at the same time, due to the overlapping arrangement of the sub-battery chips 411, the solder joints in the sub-battery chips 411 can be kept away from the thin-film battery 200, thereby avoiding damage to the thin-film battery 200 by the solder joints during lamination and improving the overall reliability and product yield.

[0041] In other embodiments, the thin-film battery 200 is connected in series or in parallel with the crystalline silicon component 400.

[0042] In this embodiment, when the thin-film battery 200 is connected in series with the crystalline silicon component 400, first determine the positive and negative poles of the thin-film battery 200 and the crystalline silicon component 400, and then use a conductive material to connect the positive pole of the thin-film battery 200 to the negative pole of the crystalline silicon component 400 to form a continuous circuit, so as to realize the electrical connection between the thin-film battery 200 and the crystalline silicon component 400 in a series manner. By connecting the thin-film battery 200 and the crystalline silicon component 400 in series, the total output voltage of the laminated battery can be increased, which is suitable for occasions with high voltage requirements.

[0043] When the thin-film battery 200 is connected in parallel with the crystalline silicon module 400, first determine the positive and negative electrodes of the thin-film battery 200 and the crystalline silicon module 400, and then use a conductive material to connect the positive electrode of the thin-film battery 200 and the positive electrode of the crystalline silicon module 400 together, and at the same time connect the negative electrodes of the thin-film battery 200 and the crystalline silicon module 400 together, so as to realize the electrical connection between the thin-film battery 200 and the crystalline silicon module 400 in a parallel manner. By connecting the thin-film battery 200 and the crystalline silicon module 400 electrically in parallel, the total output current in the stacked battery can be increased, which is suitable for occasions with high requirements for current. At the same time, if any one of the thin-film battery 200 and the crystalline silicon module 400 fails, the other can still continue to work, improving the reliability of the stacked battery.

[0044] In other realizable ways, the thin-film battery 200 and the crystalline silicon module 400 are not electrically connected to each other, and electrode terminals are respectively led out from the thin-film battery 200 and the crystalline silicon module 400. The thin-film battery 200 and the crystalline silicon module 400 are electrically independent of each other in the circuit, so that the thin-film battery 200 is connected to the external circuit through its own positive and negative electrodes, and at the same time the crystalline silicon module 400 is also connected to the external circuit through its own positive and negative electrodes, thereby realizing independent energy output respectively, providing greater flexibility for the design of the stacked battery.

[0045] Combined with referring to Figure 3 , in one embodiment, polar ends 412 are respectively provided on the top end face and the bottom end face of the sub-cell 411; the polar end 412 at the top of one sub-cell 411 is electrically connected to the polar end 412 at the bottom of another adjacent and overlapping sub-cell 411.

[0046] In this embodiment, polar ends 412 are respectively arranged on the top end face and the bottom end face of the sub-cell 411 to determine the inflow direction and the outflow direction of the current in the sub-cell 411, and the sub-cell 411 can be effectively connected and combined with other sub-cells 411 or the external circuit through the polar ends 412. Lead the wire 413 out from the polar end 412 at the top of one sub-cell 411 and connect it to the polar end 412 at the bottom of another adjacent and overlapping sub-cell 411, so that two adjacent sub-cells 411 are electrically connected in series, so that the current is sequentially transmitted between the sub-cells 411 in the cell group 410, thereby forming a complete circuit, which can improve the performance, efficiency and reliability of the stacked battery. Moreover, the wiring length of the wire 413 can be effectively reduced, saving the manufacturing cost.

[0047] Combined with referring to Figure 2 、 Figure 3 , in one embodiment, the polar end 412 is arranged in the overlapping area of two adjacent sub-cells 411.

[0048] In this embodiment, since two adjacent sub-cell pieces 411 are arranged with their heads and tails misaligned and overlapped, there is an overlapping part between two adjacent sub-cell pieces 411, that is, an overlapping area; a polarity terminal 412 is provided on the sub-cell piece 411, and the polarity terminal 412 is hidden in the overlapping area between two adjacent sub-cell pieces 411. At the same time, the wire 413 for electrically connecting two adjacent sub-cell pieces 411 is also hidden in the overlapping area, so as to make better use of the usage space of the sub-cell piece 411, make the structure of the entire crystalline silicon component 400 more compact, and can increase the aesthetics of the crystalline silicon component 400.

[0049] In one embodiment, the polarity terminal 412 is provided outside the overlapping area between two adjacent sub-cell pieces 411.

[0050] In this embodiment, by setting the polarity terminal 412 outside the overlapping area between two adjacent sub-cell pieces 411, the operation convenience can be improved when welding the polarity terminal 412 on the sub-cell piece 411 and using the wire 413 to electrically connect two adjacent sub-cell pieces 411, which is convenient for the arrangement of the wire 413. Whether to set the polarity terminal 412 inside or outside the overlapping area between two adjacent sub-cell pieces 411 can be selected according to actual usage requirements.

[0051] In one embodiment, the polarity terminal 412 is one or more solder joints.

[0052] In this embodiment, the polarity terminal 412 is set in the form of solder joints to facilitate the electrical connection between the sub-cell pieces 411. According to specific circuit designs and usage requirements, the polarity terminals 412 on the top end face and the bottom end face of the sub-cell piece 411 can each be composed of one or more solder joints. In a crystalline silicon solar cell, each sub-cell piece 411 itself includes a number of electrode sub-grid lines and electrode main grid lines. The electrode grid lines of adjacent sub-cell pieces 411 can be directly electrically connected through solder joints one by one, or the main grid lines of adjacent sub-cell pieces 411 can be electrically connected to each other through solder joints.

[0053] In one embodiment, several groups of cell piece groups 410 are arranged at intervals, and two adjacent groups of cell piece groups 410 are connected in series.

[0054] In this embodiment, several groups of cell groups 410 can be arranged at intervals on the same plane, where the interval distance can be set according to actual usage requirements. By arranging several groups of cell groups 410 at intervals, heat conduction between the cell groups 410 can be reduced, preventing local overheating, thereby improving the stability and reliability of the entire laminated battery; moreover, it can also provide space for wiring and connection, facilitating the connection between each cell group 410. Further, the wires 413 for connecting each sub-cell 411 are all connected to the connection line 414, and the adjacent two cell groups 410 are connected in series through the connection line 414, enabling the current to pass through each cell group 410 in sequence, increasing the output voltage of the laminated battery to meet the requirements of a specific load.

[0055] In one embodiment, it further includes a second encapsulant film 500 laminated on the crystalline silicon component 400; and a second backsheet 600 laminated on the second encapsulant film 500, and the orthographic projection of the second backsheet 600 on the first backsheet 100 coincides with the first backsheet 100.

[0056] In this embodiment, the second backsheet 600 can be a second glass backsheet; the second encapsulant film 500 and the second glass backsheet are sequentially laminated on the crystalline silicon component 400; by laminating the second encapsulant film 500 between the crystalline silicon component 400 and the second glass backsheet, the second encapsulant film 500 is in full contact with the crystalline silicon component 400, and the voids of the crystalline silicon component 400 are filled by the fusibility of the second encapsulant film 500, further preventing the crystalline silicon component 400 from cracking during the lamination process, so as to better protect the crystalline silicon component 400 and ensure the performance and stability of the crystalline silicon component 400. The orthographic projection of the second glass backsheet on the first glass backsheet coincides with the first glass backsheet, that is, the size of the second glass backsheet matches that of the first backsheet 100, so that it can completely cover the crystalline silicon component 400 and other components, and can provide mechanical support and protection for the crystalline silicon component 400, improving the reliability and performance of the laminated battery.

[0057] In one embodiment, it further includes a sealant 700 disposed between the first backsheet 100 and the second backsheet 600, and the sealant 700 is disposed in the edge region between the first backsheet 100 and the second backsheet 600. The first backsheet 100, the second backsheet 600 and the sealant 700 together form a sealing cavity for sealing the thin-film battery 200, the first encapsulant film 300, the crystalline silicon component 400 and the second encapsulant film 500.

[0058] In this embodiment, the sealant 700 can be butyl rubber; the butyl rubber is disposed between the first backsheet 100 and the second backsheet 600 and in the edge area around the first backsheet 100 and the second backsheet 600, that is, the butyl rubber is disposed at a preset edge clearing distance of the first backsheet 100, so as to fill the gap between the first backsheet 100 and the second backsheet 600, and ensure that impurities such as moisture and oxygen in the external environment do not enter the laminated battery. The first backsheet 100, the second backsheet 600 and the butyl rubber together form a sealed cavity, and the thin-film battery 200, the first adhesive film 300, the crystalline silicon component 400 and the second adhesive film 500 are all disposed in the sealed cavity, so as to effectively prevent impurities such as moisture and dust in the external environment from entering the laminated battery, thereby protecting the thin-film battery 200, the first adhesive film 300, the crystalline silicon component 400, the second adhesive film 500, etc. from being damaged, effectively improving the reliability and stability of the laminated battery, and extending its service life.

[0059] In one embodiment, the thickness of the first adhesive film 300 is greater than the thickness of the sub-cell 411.

[0060] In this embodiment, the thickness of the first adhesive film 300 is set to be greater than the thickness of the sub-cell 411. When the first adhesive film 300 is melted, it can fully fill the voids of the crystalline silicon component 400; and when the laminated battery is slightly impacted, the thicker first adhesive film 300 can better buffer the impact force from the outside, reduce the direct impact on the sub-cell 411, and reduce the risk of damage to the sub-cell 411; moreover, it can also improve the bonding strength with the sub-cell 411 and other components, which helps to improve the overall performance and reliability of the laminated battery; at the same time, because a plurality of sub-cells 411 are stacked, steps will be generated at the overlapping portion. Through the thicker first adhesive film 300, the steps can be completely filled, avoiding damage to the underlying thin-film battery 200 by the sub-cell 411.

[0061] In one embodiment, the thin-film battery 200 includes any one of a perovskite thin-film battery, a copper indium gallium selenide thin-film battery, and a cadmium telluride thin-film battery.

[0062] In this embodiment, the thin-film battery 200 in the laminated battery can be selected from any one of a perovskite thin-film battery, a copper indium gallium selenide thin-film battery, and a cadmium telluride thin-film battery according to the usage requirements. Of course, other thin-film batteries other than the above three thin-film batteries can also be selected, for example, a copper indium selenide thin-film battery, a copper zinc tin sulfide thin-film battery, etc.; the selection of the thin-film battery 200 is not specifically limited.

[0063] Among them, as Figure 4As shown, the specific structure of the perovskite thin film battery is a transparent conductive layer 210, a first charge transport layer 220, a perovskite layer 230, a second charge transport layer 240, and a back electrode layer 250 stacked in sequence. Among them, the transparent conductive layer 210 corresponds to the side where the first backplane 100 is located. The perovskite material has a high light absorption coefficient and carrier mobility, enabling the perovskite thin film battery to achieve a high photoelectric conversion efficiency at a relatively thin thickness.

[0064] The specific structure of the copper indium gallium selenide thin film battery is a metal grid electrode, an antireflection film, a window layer, a transition layer, a light absorption layer, a metal back electrode, and a glass substrate stacked in sequence. The copper indium gallium selenide thin film battery has a high conversion efficiency and stability, is insensitive to the illumination angle, and is suitable for use under various environmental conditions.

[0065] The specific structure of the cadmium telluride thin film battery is a glass substrate, a transparent conductive oxide layer, a cadmium sulfide window layer, a cadmium telluride absorption layer, a back contact layer, and a back electrode stacked in sequence. The cadmium telluride thin film battery has a high conversion efficiency, stability, and reliability, and moreover, the preparation process is relatively mature and the cost is relatively low.

[0066] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A stacked battery, characterized in that, Comprising: A first backplane (100); A thin-film battery (200), the thin-film battery (200) being disposed on the first backplane (100), and the orthographic projection of the thin-film battery (200) on the first backplane (100) being within the range of the first backplane (100); A first encapsulant film (300), laminated on the thin-film battery (200); A crystalline silicon module (400), laminated on the first encapsulant film (300), the crystalline silicon module (400) comprising a plurality of groups of cell groups (410), each group of cell groups (410) being composed of a plurality of sub-cells (411) connected in series, and adjacent two of the sub-cells (411) being arranged in a head-to-tail staggered and overlapping manner.

2. The stacked battery according to claim 1, wherein Polarity terminals (412) are respectively provided on the top end face and the bottom end face of the sub-cell (411); the polarity terminal (412) at the top of one sub-cell (411) is electrically connected to the polarity terminal (412) at the bottom of another adjacent and overlapping sub-cell (411).

3. The stacked battery according to claim 2, wherein The polarity terminal (412) is disposed within the overlapping region between two adjacent sub-cells (411).

4. The stacked battery according to claim 2, characterized in that, The polarity terminal (412) is disposed outside the overlapping region between two adjacent sub-cells (411).

5. The stacked battery according to claim 2, characterized in that, The polarity terminal (412) is one or more solder joints.

6. The stacked battery according to claim 1, characterized in that, The plurality of groups of cell groups (410) are spaced apart, and adjacent two groups of cell groups (410) are connected in series.

7. The stacked battery according to claim 1, wherein, It further includes a second encapsulant film (500), laminated on the crystalline silicon module (400); A second backplane (600), laminated on the second encapsulant film (500), and the orthographic projection of the second backplane (600) on the first backplane (100) coincides with the first backplane (100).

8. The stacked battery according to claim 7, characterized in that, It further includes a sealant (700), the sealant (700) being disposed between the first backplane (100) and the second backplane (600), and the sealant (700) being disposed in the edge region of the first backplane (100) and the second backplane (600), and the first backplane (100), the second backplane (600) and the sealant (700) together form a sealing cavity for sealing the thin-film battery (200), the first encapsulant film (300), the crystalline silicon module (400) and the second encapsulant film (500).

9. The stacked battery according to claim 1, wherein The thickness of the first encapsulant film (300) is greater than the thickness of the sub-cell (411).

10. The stacked battery according to claim 1, characterized in that, The thin-film battery (200) includes any one of a perovskite thin-film battery, a copper indium gallium selenide thin-film battery, and a cadmium telluride thin-film battery.

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