Portable folding photovoltaic module
By using metal foil and flexible rigid cover material in the encapsulation design of portable foldable photovoltaic modules, the problems of bending resistance and protection performance of the modules are solved, achieving the effects of lightweighting and cost reduction.
Patent Information
- Application Number
- CN202520174886.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-26
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-01-26
AI Technical Summary
Existing portable foldable photovoltaic modules have poor bending resistance, insufficient waterproof, anti-oxidation and anti-corrosion performance, and complicated production processes with high costs.
Electrical connections between photovoltaic unit panels are made using metal foil (such as copper foil), and encapsulated using flexible and rigid cover materials. Combined with busbars and junction boxes, this simplifies the production process and avoids subsequent sewing connections.
It improves the photovoltaic modules' resistance to bending, water resistance, oxidation resistance, and corrosion resistance, reduces weight and production costs, and simplifies the manufacturing process.
Smart Images
Figure CN223899176U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of photovoltaic module technology, and in particular to a portable foldable photovoltaic module. Background Technology
[0002] Current portable foldable photovoltaic (PV) module designs on the market generally rely on interconnecting multiple small PV unit panels. These connecting lines are located on the back of the unit panels, meaning each panel comes with its own connecting wire, resulting in a large number of wire ends. These wire ends lack adequate waterproofing, and some even have exposed braided wires without a necessary protective layer. When the PV module undergoes frequent folding operations, these exposed connecting lines are highly susceptible to damage and breakage.
[0003] Furthermore, the back of photovoltaic modules is typically wrapped in fabric and secured with sewing, but this method is not ideal for waterproofing. Once the fabric surface becomes stained, cleaning becomes quite difficult. From a manufacturing perspective, the existing production process first manufactures individual panels, then connects them, and finally sews an additional layer of fabric around them. This process is not only cumbersome, but the added fabric wrapping also increases the overall weight and significantly raises manufacturing costs. Utility Model Content
[0004] The technical problem to be solved by this utility model is: in view of the fact that the existing portable foldable photovoltaic modules have poor bending resistance and poor waterproof, anti-oxidation and anti-corrosion performance, this utility model provides a portable foldable photovoltaic module with strong bending resistance and good waterproof, anti-oxidation and anti-corrosion performance.
[0005] The technical solution adopted by this utility model to solve its technical problem is: a portable foldable photovoltaic module, which includes, from top to bottom, a front cover plate, a front encapsulation material, a photovoltaic cell string, a rear encapsulation material, and a rear cover plate, and is divided into multiple module units. Different module units are electrically connected to the photovoltaic cell strings within different module units through metal foil. The metal foil and the photovoltaic cell string are located on the same layer. The front encapsulation material and the rear encapsulation material are in the form of a single sheet, corresponding to the entire module. The front cover plate and the rear cover plate are in the form of separate parts, and each front cover plate and the rear cover plate correspond to a module unit. The gap between the front cover plates is covered with a front cover plate gap material, which is a flexible cover material. The gap between the rear cover plates is covered with a rear cover plate gap material, which is a flexible cover material. The front cover plate and / or the rear cover plate are rigid cover materials.
[0006] Among them, the flexible cover material is very soft, thin and bendable; the rigid cover material has a certain thickness and rigidity, providing rigidity for the module and protecting the photovoltaic cells.
[0007] Alternatively, portable foldable photovoltaic modules are divided into multiple module units. Different module units are electrically connected to the photovoltaic cell strings within the different module units through metal foil. The metal foil and the photovoltaic cell strings are located on the same layer. The front and rear encapsulation materials are in the form of a single sheet, corresponding to the entire module. The front cover is a flexible cover material, and the rear cover is in the form of a rigid cover material, and the rear cover is in the form of a split sheet. Each rear cover corresponds to a module unit. The gaps between the rear covers are covered with a rear cover gap material, which is a flexible cover material.
[0008] Alternatively, portable foldable photovoltaic modules are divided into multiple module units. Different module units are electrically connected to the photovoltaic cell strings within the different module units through metal foil. The metal foil and the photovoltaic cell strings are located on the same layer. The front and rear encapsulation materials are in the form of a single sheet, corresponding to the entire module. The rear cover is a flexible cover material, and the front cover is in the form of a single sheet, corresponding to the entire module. The front cover is a rigid cover material, and the front cover is in the form of a split piece. Each front cover corresponds to a module unit. The gaps between the front covers are covered with a front cover gap material, which is a flexible cover material.
[0009] Furthermore, the photovoltaic cell strings within the module unit are electrically connected to each other via busbars, and are also electrically connected to the metal foil via busbars.
[0010] Furthermore, the photovoltaic module also has a junction box located on the back of one of the module units. The photovoltaic cell strings in the module unit with the junction box draw the current from the module to the junction box through a busbar.
[0011] Furthermore, the metal foil is copper foil.
[0012] Furthermore, the number of component units is two or more, the number of photovoltaic cell strings within a component unit is two or more, and the number of photovoltaic cells within a photovoltaic cell string is one or more.
[0013] The beneficial effects of this utility model are: using metal foil, such as thin copper foil, to connect photovoltaic unit panels, and encapsulating material to encapsulate the copper foil, which has good waterproof, anti-oxidation and anti-corrosion performance, and is protected by the encapsulating material. The copper foil material itself is thin, so it is more resistant to bending; using soft encapsulating material as the connecting material instead of cloth for bending, and laminating and molding in one step, without the need for subsequent sewing and connecting processes, makes the photovoltaic module lightweight and thin, simplifies the production process and reduces production costs. Attached Figure Description
[0014] 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 application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0015] Figure 1 This is a schematic diagram of the unfolded structure of this utility model;
[0016] Figure 2 This is a utility model Figure 1 The circuit diagram;
[0017] Figure 3 This is a utility model Figure 1 A structural diagram from another angle;
[0018] Figure 4 This is an exploded view of Embodiment 1 of this utility model;
[0019] Figure 5 This is a schematic diagram of the semi-expanded structure of this utility model;
[0020] Figure 6 This is a schematic diagram of the structure of this utility model after it is folded up.
[0021] The numbers in the diagram are: 1-front cover gap material, 2-front cover, 3-front encapsulation material, 4-photovoltaic cell string, 5-metal foil, 6-rear encapsulation material, 7-rear cover, 8-rear cover gap material, 9-junction box, 10-module unit, 11-busbar. Detailed Implementation
[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, 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, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0023] Example 1
[0024] Figures 1-6The portable foldable photovoltaic module shown includes, from top to bottom, a front cover plate 2, a front encapsulation material 3, a photovoltaic cell string 4, a rear encapsulation material 6, and a rear cover plate 7. The module is divided into multiple module units 10 according to the folding seam. Different module units 10 are electrically connected to the photovoltaic cell strings 4 within each module unit 10 via a metal foil 5. The metal foil 5 and the photovoltaic cell strings 4 are located on the same layer. The front encapsulation material 3 and the rear encapsulation material 6 are in single sheet form, corresponding to the entire module. The front cover plate 2 and the rear cover plate 7 are in separate form, with each front cover plate 2 and rear cover plate 7 corresponding to one module unit 10. The gap between the front cover plates 2 is covered with a front cover plate gap material 1, which is a flexible cover material. The gap between the rear cover plates 7 is covered with a rear cover plate gap material 8, which is also a flexible cover material. The front cover plate 2 and the rear cover plate 7 are both rigid cover materials.
[0025] The front cover gap material 1 and the rear cover gap material 8 can prevent the front encapsulation material 3 and the rear encapsulation material 6 from overflowing. The flexible cover material is very soft, thin and flexible, allowing the photovoltaic module to be bent and folded at the front cover gap material 1 and the rear cover gap material 8. The rigid cover material has a certain thickness and rigidity, providing rigidity for the module and protecting the photovoltaic cells.
[0026] The metal foil 5 is specifically made of copper foil. The surface of the copper foil may have a tin layer, which makes it easier to solder the copper foil to the busbar. The metal foil 5 is thin and wide. The thinness allows it to be bent, and the width ensures that the cross-sectional area has sufficient current carrying capacity.
[0027] The photovoltaic cell strings 4 in the module unit 10 are electrically connected to each other through the bus bar 11, and are also electrically connected to the metal foil 5 through the bus bar 11.
[0028] The photovoltaic module also has a junction box 9, which is located on the back of one of the module units 10. The photovoltaic cell string 4 in the module unit 10 with the junction box 9 draws the current of the module to the junction box 9 through the bus bar 11.
[0029] The portable foldable photovoltaic module of this embodiment consists of 2-20 module units 10. Each module unit 10 contains 2 strings of photovoltaic cells 4, and each string of photovoltaic cells 4 contains 1-50 cells. The heads of the two strings of photovoltaic cells 4 in the head module unit 10 are led out by a bus bar 11, and the tails of the two strings of photovoltaic cells 4 are connected by the bus bar 11 and then connected to the photovoltaic cells 4 of the next module unit 10 through copper foil. The heads and tails of the two strings of photovoltaic cells 4 in the middle module unit 10 are both connected by the bus bar 11 and then connected to the adjacent photovoltaic cells 4 of the adjacent module unit 10 through copper foil. The heads of the two strings of photovoltaic cells 4 in the tail module unit 10 are connected by the bus bar 11 and then connected to the photovoltaic cells 4 of the previous module unit 10 through copper foil. The tails of the two strings of photovoltaic cells 4 are connected by the bus bar 11, so that the two strings of photovoltaic cells 4 form a series connection.
[0030] exist Figure 1 In this module, there are 4 module units 10, 2 photovoltaic cell strings 4 within module unit 10, and 24 photovoltaic cells within photovoltaic cell strings 4.
[0031] Of course, the photovoltaic cell string 4 in the module unit 10 can actually be 4 strings, with two strings in parallel or all strings in series. Of course, there can be more, such as 6 strings or 8 strings.
[0032] During production, the photovoltaic cell strings 4, which need to be connected via busbars 11 and copper foil, are first connected. Then, the front cover plate 2, front cover plate gap material 1, front encapsulation material 3, photovoltaic cell strings 4, rear encapsulation material 6, rear cover plate 7, and rear cover plate gap material 8 are stacked according to the structure of the photovoltaic module. This is followed by lamination molding, and finally, the junction box 9 is installed. There are no subsequent assembly and sewing processes, making the manufacturing process simple, saving materials, and reducing the weight of the module.
[0033] Example 2
[0034] The process is basically the same as in Example 1, except that: the front cover 2 is made of flexible cover material and is a single sheet, corresponding to the entire assembly, eliminating the need for the front cover gap material 1 covering the gap between the front cover 2.
[0035] Specifically, the portable foldable photovoltaic module of this embodiment 2 is divided into multiple module units 10. Different module units 10 are electrically connected to the photovoltaic cell strings 4 within different module units 10 through metal foil 5. The metal foil 5 and the photovoltaic cell strings 4 are located on the same layer. The front encapsulation material 3 and the rear encapsulation material 6 are in the form of a single sheet, corresponding to the entire module. The front cover plate 2 is a flexible cover plate material, corresponding to the entire module. The rear cover plate 7 is a rigid cover plate material and is in the form of a split sheet. Each rear cover plate 7 corresponds to one module unit 10. The gap between the rear cover plates 7 is covered with a rear cover plate gap material 8, which is a flexible cover plate material.
[0036] Example 3
[0037] The process is basically the same as in Example 1, except that: the rear cover 7 is made of flexible cover material and is a single sheet, corresponding to the entire assembly, eliminating the rear cover gap material 8 that covers the gaps between the rear cover plates 7.
[0038] Specifically, the portable foldable photovoltaic module of this embodiment 3 is divided into multiple module units 10. Different module units 10 are electrically connected to the photovoltaic cell strings 4 within different module units 10 through metal foil 5. The metal foil 5 and the photovoltaic cell strings 4 are located on the same layer. The front encapsulation material 3 and the rear encapsulation material 6 are in the form of a single sheet, corresponding to the entire module. The rear cover plate 7 is a flexible cover plate material and is in the form of a single sheet, corresponding to the entire module. The front cover plate 2 is a rigid cover plate material and is in the form of a split piece. Each front cover plate 2 corresponds to one module unit 10. The gap between the front cover plates 2 is covered with a front cover plate gap material 1, which is a flexible cover plate material.
[0039] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A portable foldable photovoltaic module, comprising, from top to bottom, a front cover plate (2), a front encapsulation material (3), a photovoltaic cell string (4), a rear encapsulation material (6), and a rear cover plate (7), characterized in that: The module is divided into multiple component units (10). The photovoltaic cell strings (4) in different component units (10) are electrically connected through metal foil (5). The metal foil (5) and the photovoltaic cell strings (4) are located on the same layer. The front encapsulation material (3) and the rear encapsulation material (6) are in the form of a whole sheet, corresponding to the whole module. The front cover plate (2) and the rear cover plate (7) are in the form of separate parts. Each front cover plate (2) and the rear cover plate (7) corresponds to a component unit (10). The gap between the front cover plates (2) is covered with front cover plate gap material (1), which is a flexible cover material. The gap between the rear cover plates (7) is covered with rear cover plate gap material (8), which is a flexible cover material. The front cover plate (2) and / or the rear cover plate (7) are rigid cover materials. Alternatively, it can be divided into multiple component units (10). The photovoltaic cell strings (4) in different component units (10) are electrically connected through metal foil (5). The metal foil (5) and the photovoltaic cell strings (4) are located on the same layer. The front encapsulation material (3) and the rear encapsulation material (6) are in the form of a whole sheet, corresponding to the whole component. The front cover plate (2) is a flexible cover plate material. The front cover plate (2) is in the form of a whole sheet, corresponding to the whole component. The rear cover plate (7) is a rigid cover plate material. The rear cover plate (7) is in the form of a split piece. Each rear cover plate (7) corresponds to a component unit (10). The gap between the rear cover plates (7) is covered with rear cover plate gap material (8). The rear cover plate gap material (8) is a flexible cover plate material. Alternatively, it can be divided into multiple component units (10). Different component units (10) are electrically connected to the photovoltaic cell strings (4) within different component units (10) through metal foil (5). The metal foil (5) and the photovoltaic cell strings (4) are located on the same layer. The front encapsulation material (3) and the rear encapsulation material (6) are in the form of a single sheet, corresponding to the entire component. The rear cover plate (7) is a flexible cover plate material, and the rear cover plate (7) is in the form of a single sheet, corresponding to the entire component. The front cover plate (2) is a rigid cover plate material, and the front cover plate (2) is in the form of a split piece. Each front cover plate (2) corresponds to a component unit (10). The gap between the front cover plates (2) is covered with front cover plate gap material (1), and the front cover plate gap material (1) is a flexible cover plate material.
2. A portable foldable photovoltaic module according to claim 1, characterized in that: The photovoltaic cell strings (4) in the component unit (10) are electrically connected to each other through the busbar (11), and are also electrically connected to the metal foil (5) through the busbar (11).
3. A portable foldable photovoltaic module according to claim 1, characterized in that: It also has a junction box (9) located on the back of one of the module units (10), and the photovoltaic cell string (4) in the module unit (10) with the junction box (9) draws the current of the module to the junction box (9) through the bus bar (11).
4. A portable foldable photovoltaic module according to claim 1, characterized in that: The metal foil (5) is copper foil.
5. A portable foldable photovoltaic module according to claim 1, characterized in that: The number of the component units (10) is more than 2, the number of photovoltaic cell strings (4) in the component unit (10) is more than 2, and the number of photovoltaic cells in the photovoltaic cell string (4) is more than 1.