Portable self-folding solar cell charging device

Abstract

The utility model discloses a portable self-folding solar cell charging device. The portable self-folding solar cell charging device comprises a self-folding mechanism, a flexible solar cell module and a charging connector, the self-folding mechanism comprises a mounting shell and a connecting rod, the two ends of the connecting rod are mounted in the mounting shell in a relatively rotating manner, one end of the flexible solar cell module is fixedly connected to the connecting rod, and a self-folding spring is embedded between at least one end of the connecting rod and the mounting shell; the flexible photovoltaic module can be automatically folded and manually unfolded without arranging a driving device, the installation weight and the occupied installation size are obviously reduced, the folding and unfolding ratio is large, a large-plane storage space needed by a folding module is not needed, and the flexible photovoltaic module is portable and easy to store and store; meanwhile, during actual implementation and use, the device can achieve the quick charging of a product, can also form a high-power power supply device, and solves the problem of difficulty in outdoor power utilization.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic applications, specifically to a portable self-closing solar cell charging device. Background Technology

[0002] The continuous development of mobile electronic products has brought many conveniences to people's daily lives, especially with the widespread adoption of 4G / 5G mobile networks, making the Internet of Things and real-time monitoring a reality. However, the reception, transmission, and use of any intended function of mobile electronics all rely on energy supply. Without power, these products become useless. To ensure the "lifespan" of electronic products, one can increase their battery capacity or use portable power banks for secondary charging. However, both electronic product batteries and power banks are consumed in a single use, posing a significant challenge for outdoor activities such as hiking, camping, exploration, observation, and emergency response.

[0003] Therefore, the market needs energy replenishment devices that can be used for a long time to meet the energy supply of mobile electronic products, and solar cell charging devices have emerged to meet this need; however, existing solar cell charging devices generally have the disadvantages of being bulky, taking up a lot of space, and having a small expansion-to-contraction ratio, which makes them inconvenient to carry.

[0004] Therefore, based on the inventor's many years of focused research experience in this field, the applicant has decided to seek technical solutions to address the above-mentioned technical problems. Summary of the Invention

[0005] In view of this, the purpose of this utility model is to provide a portable self-folding solar cell charging device that can realize the self-folding and manual unfolding of flexible photovoltaic modules without the need for a drive device, significantly reducing the installation weight and volume occupied. It also has a large unfolding ratio, eliminating the need for the large flat storage space required for folding modules, making it portable and easy to store. At the same time, this utility model also directly connects a charging connector to the flexible solar cell module to achieve a convenient fast charging effect. In practical use, this application can realize fast charging of 3C products and can also form a high-power power supply device to solve the problem of outdoor power supply difficulties.

[0006] The technical solution adopted in this utility model is as follows:

[0007] A portable self-closing solar cell charging device includes a self-closing mechanism, a flexible solar cell module mounted on the self-closing mechanism, and a charging connector electrically connected to the flexible solar cell module. The self-closing mechanism includes a mounting housing and connecting rods at both ends of which are rotatably mounted within the mounting housing. One end of the flexible solar cell module is fixedly connected to the connecting rod, and a self-closing spring is embedded between at least one end of the connecting rod and the mounting housing to achieve the self-closing effect of the flexible solar cell module on the connecting rod.

[0008] Preferably, at least one end of the connecting rod is fitted with a selectively insertable locking buckle between it and the mounting housing.

[0009] Preferably, the two ends of the connecting rod are rotatably mounted in the mounting housing via a left end bearing and a right end bearing, respectively.

[0010] Preferably, both the left and right end bearings are made of metal, ceramic, or plastic.

[0011] Preferably, a lock buckle that can be selectively inserted is installed between the left end bearing and / or the right end bearing and the mounting housing.

[0012] Preferably, the self-closing spring is any one of a spiral spring, a constant force spring, and a torsion spring.

[0013] Preferably, the flexible solar cell module includes a front encapsulation section, a flexible crystalline silicon solar cell string, and a back encapsulation section that are encapsulated as a single unit.

[0014] Preferably, the flexible crystalline silicon solar cell string includes a plurality of crystalline silicon solar cells, wherein the crystalline silicon solar cells are flexible monocrystalline silicon solar cells, and their edges are selectively rounded, such that the radius of curvature of the pyramidal valleys on the front, back and sides of the edges is greater than 50 nm; the radius of curvature of the edges, protrusions and grooves on the sides is greater than 25 nm, and the distance from the rounded edge area to the edge of the flexible monocrystalline silicon solar cell is no greater than 5 mm.

[0015] Preferably, the charging connector is disposed at the other end of the flexible solar cell module, including connector positive and negative connection ports that are respectively connected to the positive and negative output terminals of the flexible solar cell module; wherein, the charging connector is further provided with a voltage output port, and a voltage adjustment plate that is electrically connected to the connector positive and negative connection ports respectively, and the voltage is adjusted by the voltage adjustment plate and then connected to the voltage output port.

[0016] Preferably, the voltage output port includes a USB output terminal and / or a Type-C output terminal and / or a Lightning output terminal; the output voltage range of the voltage output port is preferably 5-20V.

[0017] This invention proposes embedding a self-closing spring between at least one end of the connecting rod and the mounting housing. This self-closing spring enables the flexible solar cell module to retract onto the connecting rod, achieving both self-closing and manual unfolding of the flexible photovoltaic module without the need for a drive device. This significantly reduces installation weight and volume, and offers a large retraction / expansion ratio, eliminating the need for the large surface storage space required for foldable modules, making it portable and easy to store. Furthermore, this invention allows for direct connection of a charging connector to the flexible solar cell module, enabling convenient fast charging. In practical use, this application can facilitate fast charging of 3C products and can also form a high-power power supply device, solving outdoor power shortages. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the portable self-closing solar cell charging device according to a specific embodiment of this application;

[0019] Figure 2 This is a structural schematic diagram (with perspective effect) of the self-retracting mechanism under a specific embodiment of this application;

[0020] Figure 3 This is a schematic diagram of the packaging structure of a flexible solar cell module according to a specific embodiment of this application;

[0021] Figure 4 This is a schematic diagram of the structure of the charging connector according to a specific embodiment of this application. Detailed Implementation

[0022] Please refer to the above. Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, this embodiment proposes a portable self-folding solar cell charging device, including a self-folding mechanism 10, a flexible solar cell module 20 mounted on the self-folding mechanism, and a charging connector 30 electrically connected to the flexible solar cell module 20. The self-folding mechanism 10 includes a mounting housing 11 and connecting rods 12 whose two ends are rotatably mounted within the mounting housing 11. One end of the flexible solar cell module 20 is fixedly connected to the connecting rod 12, and a self-folding spring 13 is embedded between at least one end of the connecting rod 12 and the mounting housing 11 to achieve the self-folding effect of the flexible solar cell module 20 on the connecting rod 12. Preferably, to achieve free unfolding of the flexible solar cell module 20, in this embodiment, a selectively insertable locking buckle 14 is installed between at least one end of the connecting rod 12 and the mounting housing 11. In actual use, the flexible solar cell module 20 can be manually unfolded and then locked using the locking buckle 14 to prevent the self-folding spring 13 from folding the flexible solar cell module 20.

[0023] Preferably, in this embodiment, the two ends of the connecting rod 12 are respectively rotatably mounted in the mounting housing 11 via a left end bearing 15a and a right end bearing 15b; more preferably, in this embodiment, the left end bearing 15a and the right end bearing 15b are both made of metal bearings, ceramic bearings, and plastic bearings; more preferably, in this embodiment, a lock buckle 14 that can be selectively inserted is installed between the left end bearing 15a and / or the right end bearing 15b and the mounting housing 11.

[0024] Specifically, in this embodiment, a self-closing spring 13 is embedded between the left end of the connecting rod 12 and the mounting housing 11; a lock buckle 14 that can be selectively inserted is installed between the left end bearing 15a and the mounting housing 11.

[0025] Preferably, in this embodiment, the self-closing spring 13 is any one of a spiral spring, a constant force spring, and a torsion spring; preferably, in this embodiment, the mounting housing 11 is made of any one of metal, plastic, and fiber.

[0026] Preferably, in this embodiment, the flexible solar cell module 20 includes a front encapsulation portion, a flexible crystalline silicon solar cell string 21, and a back encapsulation portion, all encapsulated together. More preferably, in this embodiment, the front encapsulation portion includes a front film 22 and a hot melt adhesive film 23; the back encapsulation portion includes a hot melt adhesive film 24 and a back film 25. The front film 22, hot melt adhesive films 23 and 24, and back film 25 can all be any known front film, hot melt adhesive film, or back film in the prior art, and this application does not impose a single limitation during implementation. Specifically, in this embodiment, the front film 22 can be any one of PET, ETFE, CETFE, PVDF, and CPI; the hot melt adhesive films 23 and 24 can be any one of EVA, POE, and EPE; and the back film 25 can be any one of flexible materials such as PET, ETFE, CETFE, PVDF, CPI, glass fiber, fabric, bamboo curtain, metal sheet, and metal mesh.

[0027] It should be noted that the meanings of the English abbreviations used in this application are shown in Table 1 below:

[0028]

[0029] Preferably, in this embodiment, the flexible crystalline silicon solar cell string 21 includes a plurality of crystalline silicon solar cells, wherein the crystalline silicon solar cell is a flexible monocrystalline silicon solar cell, the edge portion of which is selectively rounded, such that the radius of curvature of the pyramid valley of the front, back and side of the edge is greater than 50nm; the radius of curvature of the edge corners, protrusions and grooves is greater than 25nm, and the distance from the rounded edge area to the edge of the flexible monocrystalline silicon solar cell is no greater than 5mm; the flexible monocrystalline silicon solar cell scheme used in this application embodiment can be further referred to in the relevant schemes of the prior published patent applications: CN202211090758X, CN202310136324.7, CN202310175757.3. In order to save space, this application will not elaborate further;

[0030] The flexible solar cell module 20 provided in this embodiment has an extreme bending diameter of up to 30 mm and an areal density of less than 500 g / m³. 2 This solves the problems of heavy weight and space occupation of solar cell modules; and the photoelectric conversion efficiency of 21 flexible crystalline silicon solar cell strings reaches 24%, with an energy density of more than 230W per square meter, resulting in high power generation efficiency.

[0031] Preferably, in this embodiment, the charging connector 30 is disposed at the other end of the flexible solar cell module 20, including connector positive and negative connection ports 31 that are respectively connected to the positive and negative output terminals of the flexible solar cell module 20; wherein, the charging connector 30 is also provided with a voltage output port, and a voltage adjustment plate (not shown in the figure, which can be specifically set according to the voltage conversion needs by those skilled in the art, and its content itself is not the innovative content of this application) connected to the voltage output port after voltage adjustment by the voltage adjustment plate.

[0032] Preferably, in this embodiment, the voltage output port includes a USB output terminal 32 and / or a Type-C output terminal 33 and / or a Lightning output terminal 34, which can realize supercharging, fast charging, and slow charging effects according to the connected load; the output voltage range of each voltage output port is preferably 5-20V; specifically, preferably, in this embodiment, the voltage output port includes a USB output terminal 32, a Type-C output terminal 33, and a Lightning output terminal 34; the voltage of the positive and negative connection ports 31 is determined by the design of the flexible solar cell module 20, and its range is preferably 5-36V.

[0033] In practical applications, this embodiment can directly achieve fast charging of 3C products, or connect a single portable self-closing solar cell charging device in series and / or in parallel via connecting cables to form a high-power power supply network, solving the problem of outdoor power supply difficulties.

[0034] 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.

[0035] To further illustrate the implementation process and effects of this application, based on the above implementation scheme, this application further proposes the following embodiments:

[0036] Example 1: See also Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, this embodiment provides a portable self-folding solar cell charging device that enables outdoor charging of mobile phones. It includes a self-folding mechanism 10, a flexible solar cell module 20, and a charging connector 30. The mounting housing 11 of the self-folding mechanism 110 is made of aluminum alloy with a wall thickness of 1 mm and an outer diameter of 50 mm. The left end bearing 15a and the right end bearing 15b are both composed of PE (polyethylene) plastic bearings.

[0037] The flexible crystalline silicon solar cell string 21 is composed of flexible monocrystalline silicon solar cells, arranged in a 14-in-1-parallel configuration. The front film 22 is made of ETFE, the hot melt adhesive films 23 and 24 are made of POE, and the back film 25 is made of PET. The flexible monocrystalline silicon solar cells are prepared using the method disclosed in the invention patent that utilizes monocrystalline silicon to transform it from brittle to flexible (CN202211090758X, CN202310136324.7, CN202310175757.3). After lamination and encapsulation, a flexible solar cell module 20 is obtained. The flexible solar cell module 20 has a size of 500mm*900mm. Under standard conditions, the module has an open-circuit voltage output of 10.50V, a short-circuit current of 8.7A, and a nominal power of 75W.

[0038] In this embodiment, the encapsulated flexible solar cell module 20 is installed and connected to the self-tightening mechanism 10. The specific method is as follows:

[0039] The flexible solar cell module 20 passes through the opening of the mounting housing 11, and one end of it is fixed to the connecting rod 12. The right end of the connecting rod 12 is installed and connected to the right end bearing 15b, and the left end is installed and connected to the self-closing spring 13 and the left end bearing 15a respectively. The spring tension is adjusted according to the length of the flexible solar cell module 20 to complete the assembly.

[0040] The encapsulated flexible solar cell module 20 is assembled and spliced ​​with the charging connector 30. The specific method is as follows:

[0041] The positive and negative output terminals of the flexible solar cell module 20 are electrically connected to the positive and negative connection ports 31 of the connector (pre-reserved) respectively. The charging connector 30 is equipped with a voltage adjustment board, and the output terminals of the voltage adjustment board are electrically connected to the USB output terminal 32, the Type-C output terminal 33, and the Lightning output terminal 34 respectively.

[0042] After the above assembly is completed, the flexible solar cell module 20 of the device can be automatically retracted. After the flexible solar cell module 20 is pulled out and unfolded, pressing the locking buckle 14 can extend it to any length and lock it. After releasing the locking buckle 14, the flexible solar cell module 20 can be automatically rolled into the self-retracting mechanism 10.

[0043] The portable self-closing solar cell charging device described in this embodiment was tested for outdoor charging:

[0044] Outdoor location: Shanghai; Weather: Sunny, light breeze; Time: 10:00-14:00; Verification results are shown in Table 2 below:

[0045]

[0046] Example 2: The remaining technical solutions of Example 2 are the same as those of Example 1, except that six portable self-closing solar cell charging devices provided in Example 1 are connected in series and networked through the wiring ports in the charging connectors 30 (the charging connectors 30 on each portable self-closing solar cell charging device are connected in series by connecting wires, specifically through the positive and negative connection ports 31 of the connectors). The outdoor output characteristics are shown in Table 3 below:

[0047] Outdoor location: Shanghai; Weather: Sunny, no wind; Time: 12:10;

[0048]

[0049] By connecting the above series-connected network structure to a portable inverter via connecting cables, a "mobile" mini power station function can be realized, which can directly power electrical appliances such as fans, electric ovens, refrigerators, stereos, and charging guns.

[0050] 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.

[0051] 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 portable self-folding solar cell charging device, characterized in that, The device includes a self-closing mechanism, a flexible solar cell module mounted on the self-closing mechanism, and a charging connector electrically connected to the flexible solar cell module. The self-closing mechanism includes a mounting housing and connecting rods at both ends of which are rotatably mounted in the mounting housing. One end of the flexible solar cell module is fixedly connected to the connecting rod, and a self-closing spring is embedded between at least one end of the connecting rod and the mounting housing to achieve the self-closing effect of the flexible solar cell module on the connecting rod.

2. The portable self-closing solar cell charging device according to claim 1, characterized in that, At least one end of the connecting rod is fitted with a selectively insertable locking buckle between it and the mounting housing.

3. The portable self-closing solar cell charging device according to claim 1, characterized in that, The two ends of the connecting rod are respectively rotatably mounted in the mounting housing via a left end bearing and a right end bearing.

4. The portable self-closing solar cell charging device according to claim 3, characterized in that, Both the left and right end bearings are made of any one of metal bearings, ceramic bearings, and plastic bearings.

5. The portable self-closing solar cell charging device according to claim 3, characterized in that, A selectively insertable locking buckle is installed between the left end bearing and / or the right end bearing and the mounting housing.

6. The portable self-closing solar cell charging device according to claim 1, characterized in that, The self-closing spring can be any one of a spiral spring, a constant force spring, or a torsion spring.

7. The portable self-closing solar cell charging device according to claim 1, characterized in that, The flexible solar cell module includes a front encapsulation section, a flexible crystalline silicon solar cell string, and a back encapsulation section, all encapsulated as a single unit.

8. The portable self-closing solar cell charging device according to claim 7, characterized in that, The flexible crystalline silicon solar cell string includes several crystalline silicon solar cells, wherein the crystalline silicon solar cells are flexible monocrystalline silicon solar cells with selectively rounded edges, such that the radius of curvature of the pyramidal valleys on the front, back, and sides of the edges is greater than 50 nm; the radius of curvature of the edges, protrusions, and grooves on the sides is greater than 25 nm; and the distance from the rounded edge area to the edge of the flexible monocrystalline silicon solar cell is no greater than 5 mm.

9. The portable self-closing solar cell charging device according to claim 1, characterized in that, The charging connector is located at the other end of the flexible solar cell module, including connector positive and negative connection ports that are respectively connected to the positive and negative output terminals of the flexible solar cell module; wherein, the charging connector is also provided with a voltage output port, and a voltage adjustment plate that is electrically connected to the connector positive and negative connection ports respectively, and the voltage is adjusted by the voltage adjustment plate and then connected to the voltage output port.

10. The portable self-closing solar cell charging device according to claim 9, characterized in that, The voltage output port includes a USB output terminal and / or a Type-C output terminal and / or a Lightning output terminal; the output voltage range of the voltage output port is preferably 5-20V.

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