Solar cell, battery module and battery pack

Abstract

The utility model relates to the field of photovoltaic technology, and provides a solar cell, a cell module and a cell pack, comprising a cell sheet, two resin layers, a fluoroplastic layer and a back film layer. Wherein the two resin layers are respectively positioned on two opposite side surfaces of the battery piece; the fluoroplastic layer and the back film layer are located on the two sides, away from each other, of the two resin layers respectively. Therefore, the battery piece is fixed more firmly, and the power generation conversion efficiency of the solar battery is effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of photovoltaics, and in particular relates to a solar cell, a battery module and a battery pack. Background Art

[0002] The solar foldable charging panel is an environmentally friendly charging device that uses solar energy to charge the 12V lead-acid batteries in electric scooters, cars, trucks, RVs and yachts. It mainly converts solar energy into electrical energy, and connects the external lead wires from the solar foldable panel to the 12V lead-acid battery for charging. It can compensate for the lost electrical energy of the 12V lead-acid battery and prevent the 12V lead-acid battery from discharging its power due to its self-discharge characteristics, thereby extending the battery life of the 12V lead-acid battery.

[0003] At present, the solar foldable charging panels on the market are mainly aluminum frame glass encapsulated solar foldable panels. However, the existing aluminum frame glass encapsulated solar foldable panels are mainly composed of aluminum frame encapsulated glass laminates, which have certain defects when used. The battery cells of the existing solar charging device are easy to deviate, and the overall structure is not stable enough; the power generation conversion efficiency of the solar panel is low. Utility Model Content

[0004] The technical purpose of the utility model is to provide a solar cell, a battery module and a battery pack, so that the battery cells are fixed more firmly and the power generation conversion efficiency of the solar cell is effectively improved.

[0005] In order to solve the above technical problems, the utility model is implemented as follows: the first aspect of the utility model provides a solar cell, including a cell, two resin layers, a fluoroplastic layer and a back film layer; wherein the two resin layers are respectively located on two opposite sides of the cell; the fluoroplastic layer and the back film layer are respectively located on two sides away from each other of the two resin layers.

[0006] Furthermore, two prepreg layers are included; wherein the prepreg layers are located between the battery cell and the resin layer.

[0007] Furthermore, it also includes an adhesive layer; wherein one of the adhesive layers is located between the resin layer and the back film layer; and one of the adhesive layers is located between the resin layer and the fluoroplastic layer.

[0008] Furthermore, the resin layer is a polyethylene terephthalate layer; and the fluoroplastic layer is an ethylene-tetrafluoroethylene copolymer layer.

[0009] Furthermore, the adhesive layer is an ethylene-vinyl acetate copolymer layer.

[0010] Furthermore, the back film layer is a fabric layer; a bracket is provided on the back film layer, and one end of the bracket is hinged to the back film layer; the bracket can form an angle of 0 degree to 180 degrees with the back film layer.

[0011] A second aspect of the utility model provides a battery module, the battery module comprising a plurality of solar cells according to any of the above solutions, the solar cells being electrically connected to each other.

[0012] A third aspect of the present invention provides a battery pack, characterized in that the battery pack comprises a plurality of the above-mentioned battery modules; wherein the plurality of battery modules are connected to each other, and the battery modules can be unfolded or folded in sequence.

[0013] Furthermore, the battery pack includes four battery modules; the battery pack includes a folded state and an unfolded state; wherein, when the battery pack is in the folded state, the four battery modules are connected in sequence and arranged in a row; when the battery pack is in the folded state, two battery modules that are far away from each other can be folded onto two battery modules located in the middle position respectively, and the two battery modules located in the middle position can be folded again so that the four battery modules are folded together.

[0014] Furthermore, the battery pack includes a fluoroplastic surface and a back film surface that are separated from each other; wherein, a reinforcement belt and a fixing part are provided on the back film surface; the reinforcement belt is provided at the edge of the back film surface and the middle position of the back film side, and is used to reinforce the battery pack and form a strip handle when folded; the fixing part is used to lock the battery modules folded against each other when the battery pack is in a folded state.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The embodiment of the utility model provides a solar cell, a battery module and a battery pack, wherein resin layers are arranged on both sides of the cell of the solar cell, and fluoroplastic layers and back film layers are arranged at two ends of the two resin layers that are far from each other. The cell is fixed by the resin layer and the back film layer, so that both sides of the cell are fixed, thereby making the cell more stable and not offset; the fluoroplastic layer can improve the mechanical properties of the solar cell and make the cell more stable, and because it has good light transmittance, it can improve the light transmittance of the solar cell compared with the related technology, thereby improving the power generation efficiency of the solar cell, and effectively improving the power generation conversion efficiency of the solar cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of a solar cell in one embodiment of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of a solar cell and a bracket in one embodiment of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of a battery module in one embodiment of the utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the battery pack in an embodiment of the utility model when it is unfolded;

[0021] Figure 5 is a schematic diagram of the unfolded structure of a battery pack in another embodiment of the utility model;

[0022] Figure 6 is a schematic diagram of the folding structure of a battery pack in another embodiment of the utility model;

[0023] In the accompanying drawings, each reference numeral represents:

[0024] 10. Solar cell; 100. Battery module; 300. Battery pack;

[0025] 1. Battery cells;

[0026] 2. Resin layer;

[0027] 3. Fluoroplastic layer;

[0028] 4. Back film layer;

[0029] 5. Prepreg layer;

[0030] 6. Adhesive layer;

[0031] 7. Bracket;

[0032] 1001, reinforcement belt; 1002, fixing piece; 1100, back film surface; 1200, fluoroplastic surface. DETAILED DESCRIPTION

[0033] The embodiments of the utility model are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the utility model, and cannot be understood as limiting the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the utility model.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "circumferential", "radial" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0036] See also Figure 1 , Figure 1 It is a structural schematic diagram of a solar cell 10 in an embodiment of the utility model; the embodiment of the present application provides a solar cell 10, including a cell 1, two resin layers 2, a fluoroplastic layer 3 and a back film layer 4; wherein the two resin layers 2 are respectively located on two opposite sides of the cell 1; the fluoroplastic layer 3 and the back film layer 4 are respectively located on two sides away from each other of the two resin layers 2.

[0037] The embodiment of the utility model provides a solar cell 10, a battery module 100 and a battery pack 1000. The two sides of the cell 1 of the solar cell 10 are provided with resin layers 2, and the two ends of the two resin layers 2 that are far away from each other are provided with fluoroplastic layers 3 and back film layers 4. The cell 1 is fixed by the resin layer 2 and the back film layer 4, so that both sides of the cell 1 are fixed, thereby making the cell 1 more stable and not offset; the fluoroplastic layer 3 can improve the mechanical properties of the solar cell 10 and make the cell 1 more stable. In addition to having good light transmittance, the fluoroplastic layer 3 can improve the light transmittance of the solar cell 10 compared with the related art, thereby improving the power generation efficiency of the solar cell 10 and effectively improving the power generation conversion efficiency of the solar cell 10.

[0038] In the embodiment of the present application, the resin layer 2 is a resin layer 2 having certain strength and toughness. The fluoroplastic layer 3 is a fluoroplastic layer 3 having good mechanical properties and light transmittance. The two opposite sides of the battery cell 1 can be the upper surface and the lower surface of the battery surface.

[0039] In some embodiments, see Figure 1The solar cell 10 further includes two prepreg layers 5, wherein the prepreg layer 5 is located between the cell sheet 1 and the resin layer 2. The prepreg layer 5 has good light transmittance, and cooperates with the fluoroplastic layer 3 to make the solar cell 10 have good charging performance, that is, the power generation conversion efficiency of the solar cell 10 can be effectively improved.

[0040] In some embodiments, see Figure 1 The solar cell 10 further includes an adhesive layer 6, wherein one adhesive layer 6 is located between the resin layer 2 and the back film layer 4; and one adhesive layer 6 is located between the resin layer 2 and the fluoroplastic layer 3. The presence of the adhesive layer can provide better adhesion between the resin layer 2 and the back film layer 4, and between the resin layer 2 and the fluoroplastic layer 3, thereby better protecting the battery cell 1 in the middle and making the battery cell 1 more stable.

[0041] In some embodiments, see Figure 1 , the resin layer 2 of the solar cell 10 can be a polyethylene terephthalate layer; the fluoroplastic layer 3 can be an ethylene-tetrafluoroethylene copolymer layer. The structure in the solar cell 10 is fixed by using a polyethylene terephthalate layer and high-quality cloth, so that both sides of the cell 1 of the solar cell 10 are fixed, so that the cell 1 is more stable and will not deviate, thereby improving the durability of the product. The use of ethylene-tetrafluoroethylene copolymer as a high-transmittance transparent protective film and a new prepreg improves the transmittance of the flexible component, thereby improving the power generation efficiency of the solar cell component and solving the defect of low power generation conversion efficiency of the original solar cell 10. In addition, a high-strength ethylene-tetrafluoroethylene copolymer layer plus a polyethylene terephthalate layer is used to combine and protect the cell 1 of the solar cell 10. Through a special lamination process, a glass-free packaging technology is realized to replace rigid and bulky glass. The net weight of the solar cell 10 product is 17.4kg, which is 50% lower than that of the aluminum frame component. The solar cell 10 is more solid, not easy to be scratched or damaged, and is light in size and easy to carry.

[0042] In some embodiments, see Figure 1 , the adhesive layer 6 of the solar cell 10 can be an ethylene-vinyl acetate copolymer layer.

[0043] In some embodiments, see Figure 1 and Figure 2; The back film layer 4 of the solar cell 10 is a fabric layer; a bracket 7 is arranged on the back film layer 4, and one end of the bracket 7 is hinged to the back film layer 4; the bracket 7 can form an angle of 0-180 degrees with the back film layer 4. The fabric layer can cooperate with the resin layer 2 to make the solar cell 10 have better flexibility and better mechanical properties, and can well fix and protect the battery cell 1, prevent the battery cell 1 from being damaged or deviated due to external force, and make the overall structure of the solar cell 10 more stable. In addition, through the design of the bracket 7, the solar cell 10 can form a support at any angle with the base surface during use, making the use process more convenient, with angle adjustability, so that the charging performance of the solar cell 10 is better, and the power generation conversion efficiency of the solar cell 10 is effectively improved. For example, the bracket 7 and the bracket 7 drawstring can be sewn on the outside of the fabric package (back film layer 4 or fabric layer) to improve the defects of the original solar cell 10 that the appearance is stiff and the angle cannot be switched at will during charging.

[0044] Compared with conventional solar cell 10 products, the solar cell 10 in the embodiment of the present application can adopt an integrated hot pressing process of back film + adhesive layer 6 + resin layer 2 + prepreg + cell 1 + prepreg + resin layer 2 + adhesive layer 6 + fluoroplastic layer 3 + cloth, and a high-strength substrate is used to protect the cell 1 of the solar cell 10. The packaging through lamination assembly and sewing of cloth makes the assembly more firm, and the cell 1 is not easy to move and be damaged, thereby improving the defect of the cell 1 of the original solar cell 10 being weak.

[0045] In some embodiments, see Figure 3 The battery module 100 includes the solar cells 10 of any of the above embodiments, and the solar cells 10 are electrically connected. The solar cells 10 in the battery module 100 can be connected in parallel or in series. The battery module 100 has a back film surface 1100, and the back film surface 1100 is provided with a bracket 7, and the bracket 7 can make the battery module 100 form an angle of 0 degrees to 180 degrees with the base surface, thereby improving the charging performance of the battery module 100; illustratively, the battery module 100 can form an angle of 60 degrees with the ground.

[0046] In some embodiments, see Figure 4 , Figure 5 and Figure 6 The battery pack 1000 includes a battery module 100 of any of the above embodiments; wherein a plurality of battery modules 100 are connected to each other, and the battery modules 100 can be unfolded or folded in sequence.

[0047] In some embodiments, see Figure 4 , Figure 5 and Figure 6, the battery pack 1000 includes four battery modules 100; the battery pack 1000 includes a folding state and an unfolding state; wherein, when the battery pack 1000 is in the folding state, the four battery modules 100 are connected in sequence and arranged in a row; when the battery pack 1000 is in the folding state, the two battery modules 100 that are far away can be folded onto the two battery modules 100 located in the middle respectively, and the two battery modules 100 located in the middle can be folded again, so that the four battery modules are folded together. Exemplarily, this high-power ultra-light folding battery pack 1000 uses ultra-light hinges to connect 4 ultra-light folding laminates to form a four-fold charging plate (i.e., battery module 100), which can be unfolded for charging or folded for storage, which is convenient for use. When unfolded, the charging plate power reaches 460W, and the maximum power current reaches 24.49A, realizing efficient charging, which can meet the charging requirements of high-power mobile power supplies, and improve the defects of the original battery pack 1000, which has limited charging efficiency and low charging efficiency.

[0048] In some embodiments, the battery pack 1000 uses a process of directly sealing the connection at the output port, and adds a waterproof rubber ring to the inner wall of the junction box used, improving the defects of the original junction box being non-waterproof and easy to weather. Furthermore, a waterproof cloth sewing process and a frameless process are used, and the waterproof level reaches IP65, improving the defects of the original battery pack 1000 product fabric being non-waterproof and the battery pack 1000 being easily damaged by water, and improving the defects of the original aluminum profile package frame being easily scratched, and the appearance being relatively stiff and bulky.

[0049] In some embodiments, the process of laminating and sewing fabrics through each solar cell 10 with built-in conductive copper foil connection is adopted, and different battery modules 100 can use substrates of different shapes, and can also be sewn with fabrics of different colors, which improves the defects of the original aluminum frame glass encapsulated solar folding panel device with a relatively simple shape and appearance and few options. At the same time, a leather-enclosed zipper can be used, which is beautiful and generous, and improves the defects of the original solar cell 10, battery module 100 and battery pack 1000 with a simple appearance.

[0050] In some embodiments, the ethylene-tetrafluoroethylene copolymer film is laminated with Teflon mesh cloth to form a honeycomb shape on the surface of the flexible layer, thereby improving the defects of the original solar cell 10, battery module 100 or battery pack 1000, such as the relatively simple and rigid appearance and limited options of the smooth flexible components.

[0051] In some embodiments, see Figure 4 , Figure 5 and Figure 6The battery pack 1000 includes a fluoroplastic surface 1200 and a back film surface 1100 which are separated from each other; wherein, a reinforcement belt 1001 and a reinforcement belt 1002 are arranged on the back film surface 1100; the reinforcement belt 1001 is arranged at the edge of the back film surface 1100 and the middle position of the back film surface 1100, and is used to reinforce the battery pack 1000 and form a strip handle when folded; the reinforcement belt 1002 is used to lock the battery modules 100 folded with each other when the battery pack 1000 is in a folded state.

[0052] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A solar cell, characterized in that: It includes a battery cell, two resin layers, a fluoroplastic layer and a back film layer; Wherein, the two resin layers are respectively located on two opposite sides of the battery cell; The fluoroplastic layer and the back film layer are respectively located on two sides away from the two resin layers.

2. The solar cell according to claim 1, characterized in that: Also included are two prepreg layers; Wherein, the prepreg layer is located between the battery cell and the resin layer.

3. The solar cell according to claim 1, characterized in that Also comprising an adhesive layer; Wherein, one of the adhesive layers is located between the resin layer and the backing film layer; A said adhesive layer is located between said resin layer and said fluoroplastic layer.

4. The solar cell according to claim 1, characterized in that The resin layer is a polyethylene terephthalate layer; The fluoroplastic layer is an ethylene-tetrafluoroethylene copolymer layer.

5. The solar cell according to claim 3, characterized in that: The adhesive layer is an ethylene-vinyl acetate copolymer layer.

6. The solar cell according to claim 1, characterized in that The back film layer is a fabric layer; A bracket is provided on the back film layer, and one end of the bracket is hinged to the back film layer; The bracket can form an angle of 0 degree to 180 degrees with the backing film layer.

7. A battery module, characterized in that: The battery module comprises a plurality of solar cells according to any one of claims 1 to 6, and the solar cells are electrically connected to each other.

8. A battery pack, characterized in that: The battery pack comprises a plurality of battery modules according to claim 7; The multiple battery modules are connected to each other, and the battery modules can be unfolded or folded in sequence.

9. The battery pack according to claim 8, characterized in that: The battery pack includes four battery modules; The battery pack includes a folded state and an unfolded state; Wherein, when the battery pack is in a folded state, the four battery modules are connected in sequence and arranged in a row; When the battery pack is in a folded state, two battery modules that are far away from each other can be folded onto two battery modules located in the middle respectively, and the two battery modules located in the middle can be folded again, so that the four battery modules are folded together.

10. The battery pack according to claim 9, characterized in that: The battery pack comprises a fluoroplastic surface and a back film surface which are separated from each other; Wherein, a reinforcement belt and a fixing piece are arranged on the back film surface; The reinforcement strip is arranged at the edge of the back film surface and the middle position of the back film surface, and is used to reinforce the battery pack and form a strip handle when folded; The fixing member is used to lock the battery modules folded against each other when the battery pack is in a folded state.

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