Photovoltaic module, series structure thereof and power generation device
By introducing anti-reverse charging diodes and bypass diodes into photovoltaic modules, the problems of reverse power supply and incorrect battery connection in photovoltaic systems are solved, thus achieving safe operation of photovoltaic modules and protection of batteries.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGDONG MAILUO ENERGY TECHNOLOGY CO LTD
- Filing Date
- 2024-12-18
- Publication Date
- 2026-04-10
AI Technical Summary
In photovoltaic systems that include battery energy storage, when the battery bus voltage is higher than the controller and photovoltaic module array voltage, backfeeding may occur, leading to energy consumption and module heating. At the same time, reverse or incorrect connection of the top and bottom battery lines in the four-terminal stacked battery can cause current and voltage mismatch and damage the battery.
Design a photovoltaic module including photovoltaic cell units and anti-reverse charging diodes. The circuit is prevented from reverse feeding by series connection, and a bypass diode is connected in parallel on the crystalline silicon cell to avoid hot spot effect. The perovskite cells are separated by laser scribing to form sub-cells and connected to a junction box, and encapsulated in a packaged module.
It effectively prevents reverse feedback in the circuit, avoids damage to photovoltaic modules, prevents current and voltage damage, and prevents hot spot effects from affecting the normal operation of other batteries.
Smart Images
Figure CN224111568U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to solar cell technical field especially relates to a photovoltaic module and its series connection structure and power generation device. BACKGROUND
[0002] In the photovoltaic system containing battery energy storage, when weak light or (night) no light, the battery bus voltage is higher than the controller and photovoltaic component square array voltage, and the access power supply phenomenon occurs, that is, the battery reversely sends power to the photovoltaic component array, and further consumes energy and causes the square array to heat.
[0003] In the four-terminal laminated battery, the top and bottom cells operate as an independent cell, that is, a perovskite cell and a crystalline silicon cell. Because the current and voltage of the top and bottom cells are different, if they are not distinguished when wiring, they are easy to be connected reversely or incorrectly, thereby causing the current and voltage to be mismatched and the battery to be damaged.
[0004] Therefore, it is urgent to develop a new photovoltaic module to overcome the above problems. UTILITY MODEL CONTENT
[0005] Therefore, it is urgent to develop a new photovoltaic module to overcome the above problems.
[0006] A photovoltaic module includes at least one photovoltaic cell unit and at least one anti-reverse charging diode; the anti-reverse charging diode is connected in series with the photovoltaic cell unit.
[0007] The above photovoltaic module can effectively prevent the occurrence of reverse feedback of the circuit, thereby avoiding damage of the photovoltaic module by reverse voltage and current and damage of the electric energy.
[0008] In one embodiment, the photovoltaic cell unit includes at least one of a first cell unit and a second cell unit, the first cell unit includes a perovskite cell sheet, and the second cell unit includes a crystalline silicon cell sheet.
[0009] In one embodiment, the photovoltaic cell unit includes a perovskite cell sheet, the perovskite cell sheet is divided into a plurality of sub-cells by laser scribing inside, and the plurality of sub-cells are electrically connected; the photovoltaic module further includes a junction box, and the positive and negative electrodes of the perovskite cell sheet and the anti-reverse charging diode connected in series are connected with the junction box.
[0010] In one embodiment, the photovoltaic module further includes a packaging assembly, and the perovskite cell sheet and the anti-reverse charging diode are sealed in the packaging assembly.
[0011] In one of the embodiments, the photovoltaic cell unit comprises a crystalline silicon cell; the photovoltaic module further comprises a junction box, and the positive and negative poles of the crystalline silicon cell connected in series with the anti-reverse charging diode are connected to the junction box.
[0012] In one of the embodiments, the photovoltaic module further comprises a packaging assembly, and the crystalline silicon cell and the anti-reverse charging diode are sealed in the packaging assembly.
[0013] In one of the embodiments, the photovoltaic cell unit comprises the first cell unit and the second cell unit, and the first cell unit and the second cell unit are arranged in a stack; the perovskite cell is divided into a plurality of sub-cells by laser scribing inside the perovskite cell, and the plurality of sub-cells are electrically connected; the photovoltaic module further comprises a junction box, and the perovskite cell connected in series with the anti-reverse charging diode is connected in parallel with the crystalline silicon cell, and the positive and negative poles formed after the parallel connection are connected to the junction box.
[0014] In one of the embodiments, the photovoltaic module further comprises a packaging assembly, and the first cell unit, the second cell unit and the anti-reverse charging diode are sealed in the packaging assembly.
[0015] In one of the embodiments, the photovoltaic cell unit comprises the first cell unit and the second cell unit, and the first cell unit and the second cell unit are arranged in a stack; the perovskite cell is divided into a plurality of sub-cells by laser scribing inside the perovskite cell, and the plurality of sub-cells are electrically connected; the photovoltaic module further comprises a first anti-reverse charging diode, a second anti-reverse charging diode, a first junction box and a second junction box; the positive and negative poles of the perovskite cell connected in series with the first anti-reverse charging diode are connected to the first junction box; and the positive and negative poles of the crystalline silicon cell connected in series with the second anti-reverse charging diode are connected to the second junction box.
[0016] In one of the embodiments, the photovoltaic module further comprises a packaging assembly, and the first cell unit, the second cell unit, the first anti-reverse charging diode and the second anti-reverse charging diode are sealed in the packaging assembly.
[0017] In one of the embodiments, the photovoltaic cell unit comprises the first cell unit and the second cell unit, the first cell unit and the second cell unit are arranged in a stack; the perovskite cell sheet is divided into a plurality of sub-cells by laser scribing, and the plurality of sub-cells are electrically connected; the photovoltaic module further comprises a bypass diode, a first junction box and a second junction box; the positive electrode and the negative electrode of the perovskite cell sheet connected in series with the anti-reverse charging diode are connected with the first junction box; the positive electrode and the negative electrode of the crystalline silicon cell sheet connected in parallel with the bypass diode are connected with the second junction box.
[0018] In one of the embodiments, the photovoltaic module further comprises a packaging assembly, and the first cell unit, the second cell unit and the anti-reverse charging diode are sealed in the packaging assembly.
[0019] In one of the embodiments, the photovoltaic cell unit comprises the first cell unit and the second cell unit, the first cell unit and the second cell unit are arranged in a stack; the perovskite cell sheet is divided into a plurality of sub-cells by laser scribing, and the plurality of sub-cells are electrically connected; the photovoltaic module further comprises a bypass diode, a first junction box and a second junction box; the positive electrode and the negative electrode of the perovskite cell sheet connected in series with the anti-reverse charging diode are connected with the first junction box; the positive electrode and the negative electrode of the crystalline silicon cell sheet connected in parallel with the bypass diode are connected with the second junction box.
[0020] The laser scribing mentioned above refers to a groove formed by laser etching of the perovskite cell sheet.
[0021] Parallel connection of the bypass diode on each crystalline silicon cell sheet can avoid the influence of the hot spot effect and the damage of one cell on the normal work of other cells.
[0022] In one of the embodiments, the photovoltaic module further comprises a packaging assembly, and the first cell unit, the second cell unit, the first anti-reverse charging diode and the second anti-reverse charging diode are sealed in the packaging assembly.
[0023] In one of the embodiments, the photovoltaic module is a four-terminal stacked photovoltaic module.
[0024] The utility model further provides a series connection structure of photovoltaic module, including a plurality of photovoltaic module and a plurality of anti-reverse charging diode as described above, the plurality of photovoltaic module is connected in series, and the anti-reverse charging diode is further connected in series between two photovoltaic modules connected in series.
[0025] In one of the embodiments, the first battery unit and the second battery unit are both independent power generation units.
[0026] The utility model also provides a power generation device, including the photovoltaic module as the above.
[0027] The utility model also provides a power consumption equipment, including the photovoltaic module as the above.
[0028] Compared with the prior art, the utility model has the following beneficial effects:
[0029] The photovoltaic module, the series connection structure and the power generation device can effectively prevent the occurrence of reverse feedback of the circuit, thereby avoiding the damage of the photovoltaic module caused by the reverse voltage and current and the damage of the electric energy. BRIEF DESCRIPTION OF DRAWINGS
[0030] Figure 1 It is the structure schematic view of perovskite photovoltaic module in embodiment 1;
[0031] Figure 2 It is the structure schematic view of crystalline silicon photovoltaic module in embodiment 2;
[0032] Figure 3 It is the structure schematic view of laminated photovoltaic module in embodiment 3;
[0033] Figure 4 It is the structure schematic view of four-terminal laminated photovoltaic module in embodiment 4;
[0034] Figure 5 It is the structure schematic view of four-terminal laminated photovoltaic module in embodiment 5;
[0035] Figure 6 It is the structure schematic view of four-terminal laminated photovoltaic module in embodiment 6;
[0036] Figure 7 It is the structure schematic view of four-terminal laminated photovoltaic module in embodiment 7;
[0037] Figure 8 It is the structure schematic view of series connection structure of laminated photovoltaic module in embodiment 8.
[0038] The figure mark explanation: 1, photovoltaic module;11, perovskite cell piece;12, crystalline silicon cell piece;13, prevent reverse charging diode;131, first prevent reverse charging diode;132, second prevent reverse charging diode;14, bypass diode;15, junction box;151, first junction box;152, second junction box;16, encapsulation assembly. DETAILED DESCRIPTION
[0039] For the purpose of facilitating the understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The preferred embodiments of the present application are shown in the drawings. However, the present application can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and fully convey the scope of the present application to those skilled in the art.
[0040] It should be noted that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can also be present.
[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.
[0042] Embodiment 1.
[0043] A photovoltaic module 1, in particular a perovskite photovoltaic module, as shown in Figure 1 includes a perovskite cell sheet 11, an anti-reverse charging diode 13, a junction box 15 and a packaging assembly 16; the perovskite cell sheet 11 is internally separated into multiple sub-cells by laser etching and achieves internal conduction, and forms positive and negative poles; the positive pole of the perovskite cell sheet 11 is connected to the positive pole of the anti-reverse charging diode 13, and the negative pole of the perovskite cell sheet 11 and the negative pole of the anti-reverse charging diode 13 are connected to the junction box 15; the perovskite cell sheet 11 and the anti-reverse charging diode 13 are sealed in the packaging assembly 16.
[0044] Embodiment 2.
[0045] A photovoltaic module 1, in particular a perovskite photovoltaic module, as shown in Figure 2 includes a perovskite cell sheet 11, an anti-reverse charging diode 13, a junction box 15 and a packaging assembly 16; the perovskite cell sheet 11 is internally separated into multiple sub-cells by laser etching and achieves internal conduction, and forms positive and negative poles; the positive pole of the perovskite cell sheet 11 is connected to the positive pole of the anti-reverse charging diode 13, and the negative pole of the perovskite cell sheet 11 and the negative pole of the anti-reverse charging diode 13 are connected to the junction box 15; the perovskite cell sheet 11 and the anti-reverse charging diode 13 are sealed in the packaging assembly 16.
[0046] Embodiment 3.
[0047] A photovoltaic module 1, in particular a perovskite photovoltaic module, as shown in Figure 3As shown, the four-terminal laminated photovoltaic module 1 comprises a perovskite cell sheet 11, a crystalline silicon cell sheet 12, an anti-reverse charging diode 13, a junction box 15 and a packaging assembly 16; the perovskite cell sheet 11 is internally separated into multiple sub-cells by laser etching and achieves internal conduction, and forms positive and negative electrodes; the positive electrode of the perovskite cell sheet 11 is connected with the negative electrode of the anti-reverse charging diode 13, the positive electrode of the anti-reverse charging diode 13 is connected with the positive electrode of the crystalline silicon cell sheet 12 and is integrated into the positive electrode of the laminated photovoltaic module 1, and the negative electrode of the perovskite cell sheet 11 and the negative electrode of the crystalline silicon cell sheet 12 are connected and integrated into the negative electrode of the laminated photovoltaic module 1; the perovskite cell sheet 11, the crystalline silicon cell sheet 12 and the anti-reverse charging diode 13 are sealed in the packaging assembly 16; and the positive and negative electrodes of the laminated photovoltaic module 1 are connected with the junction box 15.
[0048] Embodiment 4.
[0049] A photovoltaic module 1, in particular a four-terminal laminated photovoltaic module, as shown in Figure 4 comprises a first cell unit, a second cell unit, a first anti-reverse charging diode 131, a second anti-reverse charging diode 132, a first junction box 151, a second junction box 152 and a packaging assembly 16. The first cell unit and the second cell unit are arranged in a laminated manner, and the first cell unit and the second cell unit are both independent power generation units.
[0050] The first cell unit is a perovskite cell sheet 11, and the second cell unit is a crystalline silicon cell sheet 12; the perovskite cell sheet 11 is internally separated into multiple sub-cells by laser etching and achieves internal conduction, and forms positive and negative electrodes; the positive electrode of the perovskite cell sheet 11 is connected with the negative electrode of the first anti-reverse charging diode 131, and the negative electrode of the perovskite cell sheet 11 and the positive electrode of the first anti-reverse charging diode 131 are connected with the first junction box 151; the positive electrode of the crystalline silicon cell sheet 12 is connected with the negative electrode of the second anti-reverse charging diode 132, and the negative electrode of the crystalline silicon cell sheet 12 and the positive electrode of the second anti-reverse charging diode 132 are connected with the second junction box 152; and the first cell unit, the second cell unit, the first anti-reverse charging diode 131 and the second anti-reverse charging diode 132 are sealed in the packaging assembly 16.
[0051] Embodiment 5.
[0052] A photovoltaic module 1, in particular a four-terminal laminated photovoltaic module, as shown in Figure 5 comprises a first cell unit, a second cell unit, an anti-reverse charging diode 13, a bypass diode 14, a first junction box 151, a second junction box 152 and a packaging assembly 16. The first cell unit and the second cell unit are arranged in a laminated manner, and the first cell unit and the second cell unit are both independent power generation units.
[0053] The first battery unit is a perovskite battery piece 11, and the second battery unit is a crystalline silicon battery piece 12; the perovskite battery piece 11 is internally divided into multiple sub-batteries by laser etching and achieves internal conduction, and forms positive and negative electrodes; the positive electrode of the perovskite battery piece 11 is connected with the negative electrode of the anti-reverse charging diode 13, and the negative electrode of the perovskite battery piece 11 and the positive electrode of the anti-reverse charging diode 13 are connected with the first junction box 151; the positive electrode of the crystalline silicon battery piece 12 is connected with the positive electrode of the bypass diode 14, the negative electrode of the crystalline silicon battery piece 12 is connected with the negative electrode of the bypass diode 14, and the positive and negative electrodes of the crystalline silicon battery piece 12 and the bypass diode 14 in parallel are connected with the second junction box 152; the first battery unit, the second battery unit and the anti-reverse charging diode 13 are sealed in the packaging assembly 16.
[0054] Embodiment 6.
[0055] A photovoltaic module 1, in particular a four-terminal laminated photovoltaic module, as shown in Figure 6 includes a first battery unit, a second battery unit, an anti-reverse charging diode 13, a bypass diode 14, a first junction box 151, a second junction box 152 and a packaging assembly 16. The first battery unit and the second battery unit are laminated, and the first battery unit and the second battery unit are both independent power generation units.
[0056] The first battery unit is a perovskite battery piece 11, and the second battery unit is a crystalline silicon battery piece 12; the perovskite battery piece 11 is internally divided into multiple sub-batteries by laser etching and achieves internal conduction, and forms positive and negative electrodes; the positive electrode of the perovskite battery piece 11 is connected with the negative electrode of the anti-reverse charging diode 13, and the negative electrode of the perovskite battery piece 11 and the positive electrode of the anti-reverse charging diode 13 are connected with the first junction box 151; the positive electrode of the crystalline silicon battery piece 12 is connected with the positive electrode of the bypass diode 14, the negative electrode of the crystalline silicon battery piece 12 is connected with the negative electrode of the bypass diode 14, and the positive and negative electrodes of the crystalline silicon battery piece 12 and the bypass diode 14 in parallel are connected with the second junction box 152; the first battery unit, the second battery unit and the anti-reverse charging diode 13 are sealed in the packaging assembly 16.
[0057] Embodiment 7.
[0058] A photovoltaic module 1, in particular a four-terminal laminated photovoltaic module, as shown in Figure 7 includes a first battery unit, a second battery unit, an anti-reverse charging diode 13, a bypass diode 14, a first junction box 151, a second junction box 152 and a packaging assembly 16. The first battery unit and the second battery unit are laminated, and the first battery unit and the second battery unit are both independent power generation units.
[0059] The first battery unit is a perovskite battery piece 11, and the second battery unit is a crystalline silicon battery piece 12; the perovskite battery piece 11 is internally divided into a plurality of sub-batteries by laser etching and achieves internal conduction, and forms a positive electrode and a negative electrode; the positive electrode of the perovskite battery piece 11 is connected with the negative electrode of a second anti-reverse charging diode 132, and the negative electrode of the perovskite battery piece 11 is connected with the positive electrode of a first anti-reverse charging diode 131; the positive electrode of the second anti-reverse charging diode 132 and the negative electrode of the first anti-reverse charging diode 131 are connected with a first junction box 151; the positive electrode of the crystalline silicon battery piece 12 is connected with the positive electrode of a bypass diode 14, the negative electrode of the crystalline silicon battery piece 12 is connected with the negative electrode of the bypass diode 14, and the positive electrode and the negative electrode of the crystalline silicon battery piece 12 and the bypass diode 14 in parallel are connected with a second junction box 152; the first battery unit, the second battery unit, the first anti-reverse charging diode 131 and the second anti-reverse charging diode 132 are sealed in a packaging assembly 16.
[0060] Embodiment 8.
[0061] A series structure of a photovoltaic module, as shown in Figure 8 includes a plurality of photovoltaic modules 1, the plurality of photovoltaic modules 1 are connected in series with each other, and an anti-reverse charging diode 13 is installed between adjacent photovoltaic modules 1, the negative electrode of the anti-reverse charging diode 13 is connected with the positive electrode of one photovoltaic module 1, and the positive electrode of the anti-reverse charging diode 13 is connected with the negative electrode of another photovoltaic module 1.
[0062] The technical features of the above-mentioned embodiments can be combined arbitrarily, in order to make the description simple, all possible combinations of the technical features in the above-mentioned embodiments are not described, however, as long as the combination of the technical features does not exist contradictory, it should be considered that it is within the scope of the description.
[0063] The above-mentioned embodiments only express several implementation manners of the utility model, the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the utility model patent. It should be pointed out that for ordinary skilled persons in the art, on the premise of not departing from the concept of the utility model, a number of modifications and improvements can be made, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.
Claims
1. A photovoltaic module, characterized by, The photovoltaic module comprises: a photovoltaic cell unit, the photovoltaic cell unit comprising a first cell unit and a second cell unit, the first cell unit comprising a perovskite cell sheet, and the second cell unit comprising a crystalline silicon cell sheet; the first cell unit and the second cell unit are arranged in a stack; the perovskite cell sheet is divided into a plurality of sub-cells by laser scribing inside the perovskite cell sheet, and the plurality of sub-cells are electrically connected; at least one anti-reverse charging diode, the anti-reverse charging diode being connected in series with the photovoltaic cell unit; further comprising a bypass diode, a first junction box and a second junction box; the photovoltaic module further comprises a junction box, the perovskite cell sheet and the anti-reverse charging diode are connected in series, and then the perovskite cell sheet and the anti-reverse charging diode are connected in parallel with the crystalline silicon cell sheet, the positive electrode and the negative electrode formed after the parallel connection are connected with the junction box; the positive electrode and the negative electrode of the perovskite cell sheet and the anti-reverse charging diode connected in series are connected with the first junction box; the positive electrode and the negative electrode of the crystalline silicon cell sheet and the bypass diode connected in parallel are connected with the second junction box.
2. The photovoltaic module of claim 1, wherein, The anti-reverse charging diode comprises a first anti-reverse charging diode and a second anti-reverse charging diode, the positive electrode and the negative electrode of the perovskite cell sheet, the first anti-reverse charging diode and the second anti-reverse charging diode connected in series are connected with the first junction box.
3. The photovoltaic module of claim 1, wherein, Further comprising a packaging assembly, the first cell unit, the second cell unit, the anti-reverse charging diode and the bypass diode are sealed in the packaging assembly.
4. The photovoltaic module of claim 1, wherein, The photovoltaic module is a four-terminal stacked photovoltaic module.
5. A series connection of photovoltaic modules, characterized in that The photovoltaic module comprises a plurality of photovoltaic modules according to any one of claims 1-4 and a plurality of anti-reverse charging diodes, the plurality of photovoltaic modules are connected in series, and the anti-reverse charging diode is further connected in series between two photovoltaic modules connected in series.
6. A power generation device characterized by comprising: The photovoltaic module comprises a photovoltaic module according to any one of claims 1-4.