Laminated photovoltaic module

Abstract

The utility model discloses a laminated photovoltaic assembly which comprises a first battery layer, a second battery layer and at least one anti-reflux device, a first output anode of the first battery layer is connected with an anode output end of the laminated photovoltaic assembly, and a second output anode of the second battery layer is connected with an anode output end of the laminated photovoltaic assembly. A first output negative electrode of the first battery layer is connected with a negative electrode output end of the laminated photovoltaic module; the first battery layer and the second battery layer are arranged in parallel; the anti-reflux device is connected in series between a second output positive electrode of the second battery layer and the positive electrode output end or between a first output positive electrode of the first battery layer and a second output positive electrode of the second battery layer; the anti-countercurrent device is connected in series between the second output negative electrode and the negative electrode output end or between the first output negative electrode and the second output negative electrode. According to the utility model, by arranging the anti-reflux device, reverse flow of current in the laminated photovoltaic module is prevented, and the power loss of the laminated photovoltaic module is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of photovoltaic module technology, specifically relating to a multilayer photovoltaic module. Background Technology

[0002] Existing perovskite / crystalline silicon tandem photovoltaic modules include crystalline silicon and perovskite cell layers. The output voltages of the crystalline silicon and perovskite cell layers are mismatched, requiring the design of four lead-out electrodes (two positive and two negative) on the tandem photovoltaic module to connect the positive and negative output electrodes of the crystalline silicon cell layer to the positive and negative output electrodes of the perovskite cell layer, respectively, which increases the system cost.

[0003] In addition, after long-term outdoor operation, the perovskite cell layer of the perovskite / crystalline silicon tandem photovoltaic module degrades faster than the crystalline silicon cell layer. The output voltage of the perovskite cell layer is also lower than that of the crystalline silicon cell layer, causing reverse current flow within the perovskite cell layer and resulting in power loss.

[0004] Therefore, in order to address the aforementioned technical problems, it is necessary to provide a tandem photovoltaic module. Utility Model Content

[0005] The purpose of this invention is to provide a tandem photovoltaic module that can prevent reverse current flow in the tandem photovoltaic module and reduce module power loss.

[0006] To achieve the above objectives, the technical solution provided by a specific embodiment of this utility model is as follows:

[0007] A tandem photovoltaic (PV) module includes a first battery layer, a second battery layer, and at least one anti-reverse current device. The PV module includes a positive output terminal and a negative output terminal. The first battery layer includes a first positive output terminal and a first negative output terminal. The second battery layer includes a second positive output terminal and a second negative output terminal.

[0008] The first positive output terminal is connected to the positive output terminal of the tandem photovoltaic module, and the first negative output terminal is connected to the negative output terminal of the tandem photovoltaic module.

[0009] The first battery layer and the second battery layer are connected in parallel. The anti-reverse current device is connected in series between the second positive output terminal and the positive output terminal of the tandem photovoltaic module or between the first positive output terminal and the second positive output terminal, and / or; the anti-reverse current device is connected in series between the second negative output terminal and the negative output terminal of the tandem photovoltaic module or between the first negative output terminal and the second negative output terminal.

[0010] In one or more embodiments of this utility model, the anti-reverse current device includes a first anti-reverse current diode, the anode of the first anti-reverse current diode is connected to the second output positive terminal, and the cathode of the first anti-reverse current diode is connected to the first output positive terminal or the positive output terminal.

[0011] In one or more embodiments of this utility model, the anti-reverse current device includes a second anti-reverse current diode, the anode of the second anti-reverse current diode is connected to the first output negative terminal or the negative output terminal, and the cathode of the second anti-reverse current diode is connected to the second output negative terminal.

[0012] In one or more embodiments of this utility model, the initial voltage difference between the first output positive terminal and the first output negative terminal is equal to the initial voltage difference between the second output positive terminal and the second output negative terminal.

[0013] In one or more embodiments of the present invention, the first battery layer includes multiple battery strings connected in series between the first output positive electrode and the first output negative electrode, and the stacked photovoltaic module includes multiple bypass diodes;

[0014] The anode of the bypass diode is directly or indirectly connected to the negative terminal of a battery string, and the cathode is directly or indirectly connected to the positive terminal of the same battery string.

[0015] In one or more embodiments of the present invention, the stacked photovoltaic module further includes a plurality of third anti-reverse current diodes connected in series between the first output positive terminal and the first output negative terminal;

[0016] The anode of the third anti-reverse current diode is connected to the positive terminal of a group of battery strings, and the cathode is connected to the cathode of the bypass diode corresponding to the same group of battery strings.

[0017] In one or more embodiments of this utility model, the first battery layer includes a first set of battery strings, a second set of battery strings, and a third set of battery strings; the stacked photovoltaic module includes a first bypass diode, a second bypass diode, and a third bypass diode; three third anti-reverse current diodes are provided, each corresponding to one of the first set of battery strings, one of the second set of battery strings, and one of the third set of battery strings, respectively; wherein,

[0018] The positive terminal of the first group of battery strings is the first output positive terminal, and the negative terminal of the third group of battery strings is the first output negative terminal.

[0019] The anode of the first bypass diode is connected to the negative terminal of the first battery string, and the cathode is connected to the cathode of the third anti-reverse current diode corresponding to the first battery string. The anode of the third anti-reverse current diode corresponding to the first battery string is connected to the positive terminal of the first battery string.

[0020] The anode of the second bypass diode is connected to the negative terminal of the second battery string, and the cathode is connected to the cathode of the third anti-reverse current diode corresponding to the second battery string. The anode of the third anti-reverse current diode corresponding to the second battery string is connected to the positive terminal of the second battery string.

[0021] The anode of the third bypass diode is connected to the negative terminal of the third battery string, and the cathode is connected to the cathode of the third anti-reverse current diode corresponding to the third battery string. The anode of the third anti-reverse current diode corresponding to the third battery string is connected to the positive terminal of the third battery string.

[0022] In one or more embodiments of this utility model, the third anti-reverse current diode and the bypass diode are disposed inside the photovoltaic junction box.

[0023] In one or more embodiments of the present invention, the first battery layer is a crystalline silicon battery layer, comprising a plurality of arrayed crystalline silicon battery cells;

[0024] The second battery layer is a perovskite battery layer, comprising multiple perovskite battery cells arranged in an array.

[0025] In one or more embodiments of this utility model, the stacked photovoltaic module further includes a front glass, a first encapsulating film, a second encapsulating film, and a back glass; wherein,

[0026] The front glass is located above the perovskite solar cell layer;

[0027] The first encapsulating film is located between the perovskite solar cell layer and the crystalline silicon solar cell layer;

[0028] The second encapsulating film is located between the crystalline silicon cell layer and the back glass;

[0029] The back glass is located below the crystalline silicon cell layer.

[0030] Compared with the prior art, the stacked photovoltaic module of this utility model, by setting an anti-reverse current device, prevents the reverse current flow between the first and second battery layers when the output voltage of the second battery layer is less than the output voltage of the first battery layer, thereby reducing the power loss of the stacked photovoltaic module.

[0031] By connecting the first and second battery layers in parallel and matching the output voltage of the first and second battery layers, only two electrodes are needed on the tandem photovoltaic module, namely the positive output terminal and the negative output terminal, thereby reducing the system cost of the tandem photovoltaic module.

[0032] By connecting a third anti-reverse current diode in series between two adjacent battery strings in the first battery layer, when the first battery layer is partially blocked, the current from the second battery layer is prevented from flowing into the first battery layer, and the reverse flow of current within the first battery layer is also prevented, thereby reducing power loss. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is the equivalent circuit diagram of the tandem photovoltaic module in Embodiment 1 of this utility model;

[0035] Figure 2 This is a schematic diagram of the stacked photovoltaic module in Embodiment 1 of this utility model;

[0036] Figure 3 This is the equivalent circuit diagram of the tandem photovoltaic module in Embodiment 2 of this utility model;

[0037] Figure 4 This is the equivalent circuit diagram of the tandem photovoltaic module in Embodiment 3 of this utility model;

[0038] Figure 5 This is the equivalent circuit diagram of the tandem photovoltaic module in Embodiment 3 of this utility model;

[0039] Figure 6 This is the equivalent circuit diagram of the tandem photovoltaic module in Embodiment 4 of this utility model. Detailed Implementation

[0040] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0041] Example 1:

[0042] like Figure 1 As shown, the stacked photovoltaic module in this embodiment includes a first battery layer 10, a second battery layer 20, and two anti-reverse current devices. The stacked photovoltaic module includes a positive output terminal 30 and a negative output terminal 40. The first battery layer 10 includes a first output positive electrode 11 and a first output negative electrode 12. The second battery layer 20 includes a second output positive electrode 21 and a second output negative electrode 22.

[0043] The first positive output terminal 11 is connected to the positive output terminal 30 of the tandem photovoltaic module, and the first negative output terminal 12 is connected to the negative output terminal 40 of the tandem photovoltaic module.

[0044] In this embodiment, the first battery layer 10 and the second battery layer 20 are connected in parallel, the anti-reverse current device is connected in series between the first output positive electrode 11 and the second output positive electrode 21, and the anti-reverse current device is connected in series between the first output negative electrode 12 and the second output negative electrode 22.

[0045] like Figure 1 As shown, the anti-reverse current device in this embodiment includes a first anti-reverse current diode D1 and a second anti-reverse current diode D2. The anode of the first anti-reverse current diode D1 is connected to the second output positive terminal 21, and the cathode of the first anti-reverse current diode D1 is connected to the first output positive terminal 11. The anode of the second anti-reverse current diode D2 is connected to the first output negative terminal 12, and the cathode of the second anti-reverse current diode D2 is connected to the second output negative terminal 22.

[0046] Furthermore, in this embodiment, the initial voltage difference between the first output positive terminal 11 and the first output negative terminal 12 is equal to the initial voltage difference between the second output positive terminal 21 and the second output negative terminal 22.

[0047] Furthermore, in this embodiment, the first battery layer 10 is a crystalline silicon battery layer, comprising a plurality of arrayed crystalline silicon battery cells 13. The second battery layer 20 is a perovskite battery layer, comprising a plurality of arrayed perovskite battery cells 23. It is understood that in this embodiment, the initial voltage difference between the first output positive electrode 11 and the first output negative electrode 12 and the initial voltage difference between the second output positive electrode 21 and the second output negative electrode 22 can be made equal by setting the number of crystalline silicon battery cells 13 and perovskite battery cells 23.

[0048] Understandably, by setting the first battery layer 10 and the second battery layer 20 in parallel, the tandem photovoltaic module only needs two lead-out electrodes, namely the positive output terminal 30 and the negative output terminal 40, which will not increase the system cost of the tandem photovoltaic module.

[0049] After prolonged outdoor operation, the voltage difference between the first positive output electrode 11 and the first negative output electrode 12 of the crystalline silicon cell layer will be less than the initial voltage difference. Similarly, the voltage difference between the second positive output electrode 21 and the second negative output electrode 22 of the perovskite cell layer will also be less than the initial voltage difference. However, since the decay rate of the perovskite cell is faster than that of the crystalline silicon cell, the voltage difference between the second positive output electrode 21 and the second negative output electrode 22 of the perovskite cell layer is less than the voltage difference between the first positive output electrode 11 and the first negative output electrode 12 of the crystalline silicon cell layer. Therefore, this invention connects the first anti-reverse current diode D1 and the second anti-reverse current diode D2 in series at both ends of the perovskite cell layer, and then connects them in parallel with the crystalline silicon cell layer to prevent the reverse flow of current between the perovskite cell layer and the crystalline silicon cell layer, thereby reducing power loss.

[0050] like Figure 2 As shown, the tandem photovoltaic module in this embodiment also includes a front glass 50, a first encapsulating film 60, a second encapsulating film 70, and a back glass 80. The front glass 50 is located above the perovskite cell layer 20; the first encapsulating film 60 is located between the perovskite cell layer 20 and the crystalline silicon cell layer 10; the second encapsulating film 70 is located between the crystalline silicon cell layer 10 and the back glass 80; and the back glass 80 is located below the crystalline silicon cell layer 10.

[0051] Example 2:

[0052] like Figure 3 As shown, the stacked photovoltaic module in this embodiment includes a first battery layer 10, a second battery layer 20, and two anti-reverse current devices. The stacked photovoltaic module includes a positive output terminal 30 and a negative output terminal 40. The first battery layer 10 includes a first output positive electrode 11 and a first output negative electrode 12. The second battery layer 20 includes a second output positive electrode 21 and a second output negative electrode 22.

[0053] The first positive output 11 is connected to the positive output terminal 30 of the tandem photovoltaic module, and the first negative output 12 is connected to the negative output terminal 40 of the tandem photovoltaic module. In this embodiment, the first battery layer 10 and the second battery layer 20 are arranged in parallel.

[0054] The difference between this embodiment and Embodiment 1 is that the anti-reverse current device is connected in series between the first output positive terminal 11 and the positive output terminal 30 of the tandem photovoltaic module, and the anti-reverse current device is connected in series between the second output negative terminal 22 and the negative output terminal 40 of the tandem photovoltaic module.

[0055] Furthermore, the anti-reverse current device includes a first anti-reverse current diode D1 and a second anti-reverse current diode D2. The anode of the first anti-reverse current diode D1 is connected to the second output positive terminal 21, and the cathode of the first anti-reverse current diode D1 is connected to the positive output terminal 30 of the tandem photovoltaic module. The anode of the second anti-reverse current diode D2 is connected to the negative output terminal 40 of the tandem photovoltaic module, and the cathode of the second anti-reverse current diode D2 is connected to the second output negative terminal 22.

[0056] Example 3:

[0057] The difference between this embodiment and Embodiment 1 is that the tandem photovoltaic module includes an anti-reverse current device.

[0058] like Figure 4 As shown, the anti-reverse current device includes a first anti-reverse current diode D1. The anode of the first anti-reverse current diode D1 is connected to the second output positive terminal 21, and the cathode of the first anti-reverse current diode D1 is connected to the first output positive terminal 11 or the positive output terminal 30. Or as... Figure 5 As shown, the anti-reverse current device includes a second anti-reverse current diode D2. The anode of the second anti-reverse current diode D2 is connected to the first output negative terminal 12 or the negative output terminal 40, and the cathode of the second anti-reverse current diode D2 is connected to the second output negative terminal 22.

[0059] Example 4:

[0060] like Figure 6 As shown, in this embodiment, the first battery layer includes multiple battery strings connected in series between the first output positive electrode 11 and the first output negative electrode 12. The tandem photovoltaic module includes multiple bypass diodes, wherein the anode of the bypass diode is directly or indirectly connected to the negative electrode of a battery string, and the cathode is directly or indirectly connected to the positive electrode of the same battery string.

[0061] Preferably, the first battery layer 10 includes a first battery string 14, a second battery string 15 and a third battery string 16 connected in series between the first output positive electrode 11 and the first output negative electrode 12, and the stacked photovoltaic module includes a first bypass diode D31, a second bypass diode D32 and a third bypass diode D33.

[0062] The positive terminal of the first battery string 14 is the first output positive terminal 11, and the negative terminal of the third battery string 16 is the first output negative terminal 12. The anode of the first bypass diode D31 is directly or indirectly connected to the negative terminal of the first battery string 14, and the cathode of the first bypass diode D31 is directly or indirectly connected to the positive terminal of the first battery string 14. The anode of the second bypass diode D32 is directly or indirectly connected to the negative terminal of the second battery string 15, and the cathode of the second bypass diode D32 is directly or indirectly connected to the positive terminal of the second battery string 15. The anode of the third bypass diode D33 is directly or indirectly connected to the negative terminal of the third battery string 16, and the cathode of the third bypass diode D33 is directly or indirectly connected to the positive terminal of the third battery string 16.

[0063] Furthermore, the first battery layer 10 in this embodiment also includes a first busbar and a second busbar; wherein, the negative terminal of the first battery string 14 and the positive terminal of the second battery string 15 are connected through the first busbar, and the negative terminal of the second battery string 15 and the positive terminal of the third battery string 16 are connected through the second busbar.

[0064] like Figure 6 As shown, the difference between this embodiment and Embodiment 1 is that the tandem photovoltaic module further includes several third anti-reverse current diodes connected in series between the first output positive electrode 11 and the first output negative electrode 12.

[0065] The anode of the third anti-reverse current diode is connected to the positive terminal of a battery string, and the cathode is connected to the cathode of the corresponding bypass diode in the same battery string.

[0066] In this embodiment, three third anti-reverse current diodes are provided, including third anti-reverse current diode D41, third anti-reverse current diode D42 and third anti-reverse current diode D43, which correspond to the first battery string 14, the second battery string 15 and the third battery string 16 respectively.

[0067] The anode of the third anti-reverse current diode D41 is connected to the positive terminal of the first battery string 14, and the cathode of the third anti-reverse current diode D41 is connected to the cathode of the first bypass diode D31. The anode of the third anti-reverse current diode D42 is connected to the positive terminal of the second battery string 15, and the cathode of the third anti-reverse current diode D42 is connected to the cathode of the second bypass diode D32. The anode of the third anti-reverse current diode D43 is connected to the positive terminal of the third battery string 16, and the cathode of the third anti-reverse current diode D43 is connected to the cathode of the third bypass diode D33.

[0068] When one or more crystalline silicon solar cells malfunction or are shaded, the malfunctioning or shaded cells will cause a voltage drop, potentially even causing the bypass diodes to conduct. In this situation, the voltage difference between the first positive output terminal 11 and the first negative output terminal 12 of the crystalline silicon solar cell layer will be less than the initial voltage difference, while the voltage difference between the second positive output terminal 21 and the second negative output terminal 22 of the perovskite solar cell layer will be greater than the voltage difference between the first positive output terminal 11 and the first negative output terminal 12. Connecting a third anti-reverse current diode D41, D42, and D43 in series within the crystalline silicon solar cell layer prevents current from flowing from the perovskite solar cell layer into the crystalline silicon solar cell layer under these conditions, and also prevents reverse current flow within the crystalline silicon solar cell layer, thus reducing power loss.

[0069] Taking the first battery string 14 being blocked as an example: the output voltage of the second battery layer 20 is higher than the output voltage of the first battery layer 10, the first bypass diode D31 is turned on, and based on the third anti-reverse current diode D42, the current of the second battery layer 20 is prevented from flowing to the second battery string 15 and the third battery string 16 of the first battery layer 10.

[0070] Furthermore, in this embodiment, the crystalline silicon solar cells 13 in each group of battery strings are connected by photovoltaic solder strips. In this embodiment, the photovoltaic solder strips can be tin-plated copper strips. The busbar in this embodiment is also called a laminated busbar, which is a power module electrical connection component with a multi-layer laminated structure.

[0071] In this embodiment, each battery string includes two rows of crystalline silicon solar cells 13. The positive terminal of each battery string is the positive electrode of the first crystalline silicon solar cell connected in series in that string, and the negative terminal is the negative electrode of the last crystalline silicon solar cell connected in series in that string. The two rows of crystalline silicon solar cells in each battery string are connected by a busbar.

[0072] Furthermore, the first anti-reverse current diode D1, the second anti-reverse current diode D2, the third anti-reverse current diode D41, the third anti-reverse current diode D42, the third anti-reverse current diode D43, the first bypass diode D31, the second bypass diode D32, and the third bypass diode D33 are disposed inside the photovoltaic junction box.

[0073] As can be seen from the above technical solutions, this utility model has the following beneficial effects:

[0074] The tandem photovoltaic module of this invention, by setting an anti-reverse current device, prevents the reverse current flow between the first and second battery layers when the output voltage of the second battery layer is less than the output voltage of the first battery layer, thereby reducing the power loss of the tandem photovoltaic module.

[0075] By connecting the first and second battery layers in parallel and matching the output voltage of the first and second battery layers, only two electrodes are needed on the tandem photovoltaic module, namely the positive output terminal and the negative output terminal, thereby reducing the system cost of the tandem photovoltaic module.

[0076] By connecting a third anti-reverse current diode in series between two adjacent battery strings in the first battery layer, when the first battery layer is partially blocked, the current from the second battery layer is prevented from flowing into the first battery layer, and the reverse flow of current within the first battery layer is also prevented, thereby reducing power loss.

[0077] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0078] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A multilayer photovoltaic module, characterized in that, The tandem photovoltaic module includes a first battery layer, a second battery layer, and at least one anti-reverse current device. The tandem photovoltaic module includes a positive output terminal and a negative output terminal. The first battery layer includes a first positive output terminal and a first negative output terminal, and the second battery layer includes a second positive output terminal and a second negative output terminal. The first positive output terminal is connected to the positive output terminal of the tandem photovoltaic module, and the first negative output terminal is connected to the negative output terminal of the tandem photovoltaic module. The first battery layer and the second battery layer are connected in parallel. The anti-reverse current device is connected in series between the second positive output terminal and the positive output terminal of the tandem photovoltaic module or between the first positive output terminal and the second positive output terminal, and / or; the anti-reverse current device is connected in series between the second negative output terminal and the negative output terminal of the tandem photovoltaic module or between the first negative output terminal and the second negative output terminal.

2. The tandem photovoltaic module according to claim 1, characterized in that, The anti-reverse current device includes a first anti-reverse current diode, the anode of which is connected to the second output positive terminal, and the cathode of which is connected to the first output positive terminal or the positive output terminal.

3. The tandem photovoltaic module according to claim 1, characterized in that, The anti-reverse current device includes a second anti-reverse current diode, the anode of which is connected to the first output negative terminal or the negative output terminal, and the cathode of which is connected to the second output negative terminal.

4. The tandem photovoltaic module according to claim 1, characterized in that, The initial voltage difference between the first positive output terminal and the first negative output terminal is equal to the initial voltage difference between the second positive output terminal and the second negative output terminal.

5. The tandem photovoltaic module according to claim 1, characterized in that, The first battery layer includes multiple battery strings connected in series between the first output positive terminal and the first output negative terminal, and the stacked photovoltaic module includes multiple bypass diodes; The anode of the bypass diode is directly or indirectly connected to the negative terminal of a battery string, and the cathode is directly or indirectly connected to the positive terminal of the same battery string.

6. The tandem photovoltaic module according to claim 5, characterized in that, The stacked photovoltaic module also includes several third anti-reverse current diodes connected in series between the first output positive terminal and the first output negative terminal; The anode of the third anti-reverse current diode is connected to the positive terminal of a group of battery strings, and the cathode is connected to the cathode of the bypass diode corresponding to the same group of battery strings.

7. The tandem photovoltaic module according to claim 6, characterized in that, The first battery layer includes a first set of battery strings, a second set of battery strings, and a third set of battery strings. The stacked photovoltaic module includes a first bypass diode, a second bypass diode, and a third bypass diode. Three third anti-reverse current diodes are provided, each corresponding to one of the first, second, and third battery strings, respectively. The positive terminal of the first group of battery strings is the first output positive terminal, and the negative terminal of the third group of battery strings is the first output negative terminal. The anode of the first bypass diode is connected to the negative terminal of the first battery string, and the cathode is connected to the cathode of the third anti-reverse current diode corresponding to the first battery string. The anode of the third anti-reverse current diode corresponding to the first battery string is connected to the positive terminal of the first battery string. The anode of the second bypass diode is connected to the negative terminal of the second battery string, and the cathode is connected to the cathode of the third anti-reverse current diode corresponding to the second battery string. The anode of the third anti-reverse current diode corresponding to the second battery string is connected to the positive terminal of the second battery string. The anode of the third bypass diode is connected to the negative terminal of the third battery string, and the cathode is connected to the cathode of the third anti-reverse current diode corresponding to the third battery string. The anode of the third anti-reverse current diode corresponding to the third battery string is connected to the positive terminal of the third battery string.

8. The tandem photovoltaic module according to claim 6, characterized in that, The third anti-reverse current diode and the bypass diode are located inside the photovoltaic junction box.

9. The tandem photovoltaic module according to claim 1, characterized in that, The first battery layer is a crystalline silicon battery layer, comprising multiple arrayed crystalline silicon battery cells; The second battery layer is a perovskite battery layer, comprising multiple perovskite battery cells arranged in an array.

10. The tandem photovoltaic module according to claim 9, characterized in that, The stacked photovoltaic module further includes a front glass, a first encapsulating film, a second encapsulating film, and a back glass; wherein... The front glass is located above the perovskite solar cell layer; The first encapsulating film is located between the perovskite solar cell layer and the crystalline silicon solar cell layer; The second encapsulating film is located between the crystalline silicon cell layer and the back glass; The back glass is located below the crystalline silicon cell layer.

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