Battery cell assembly and photovoltaic device

Abstract

The present application provides a battery cell assembly and a photovoltaic device. The battery cell assembly comprises: battery cells, wherein the battery cells can convert light energy into electric energy; a frame, wherein the frame is provided with an accommodating recess, the battery cells are arranged in the accommodating recess, and at least one part of the frame comprises a reinforced fiber material and a polyurethane material.

Description

Solar cell modules and photovoltaic devices

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on February 1, 2024, with application number 202410158996.2 and application name “Solar Cell Assembly and Photovoltaic Device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of photovoltaic equipment, and in particular to a cell assembly and a photovoltaic device. Background Art

[0003] With the rise of the camping economy, people have an increasing demand for portable outdoor solar power supplies and portable solar photovoltaic modules. At present, portable solar panels in related technologies are usually encapsulated with glass fiber epoxy resin composite panels or aluminum alloy panels on the back, or, in order to reduce their own weight, adopt a frameless design.

[0004] However, portable solar panels accumulate significant heat after prolonged exposure to sunlight. Frameless solar photovoltaic products are prone to warping and deformation, making them difficult to store and fold properly. Furthermore, because crystalline silicon solar cells have a low curvature and are fragile, they can easily break if the product is deformed or dropped, reducing or even eliminating the power generation performance of the portable solar panel.

[0005] In addition, the back side is encapsulated with a glass fiber epoxy resin composite board or an aluminum alloy board, which is heavy and inconvenient to carry.

[0006] Application Contents

[0007] The embodiments of the present application are intended to solve at least one of the technical problems existing in the prior art.

[0008] To this end, a first aspect of an embodiment of the present application provides a battery cell assembly.

[0009] A second aspect of the embodiments of the present application provides a photovoltaic device.

[0010] In view of this, according to the first aspect of an embodiment of the present application, a battery cell assembly is provided, which includes: battery cells, which can convert light energy into electrical energy; a frame, which is provided with a receiving groove, and the battery cells are arranged in the receiving groove; wherein, at least a portion of the frame includes reinforced fiber material and polyurethane material.

[0011] The battery cell assembly provided in the embodiment of the present application includes a battery cell and a frame. Specifically, the frame is provided with a receiving groove, and the battery cell is arranged in the receiving groove. That is, the frame is provided on the periphery of the battery cell.

[0012] Solar cells convert light energy into electricity. Under prolonged sunlight, the cell surface area exposed to heat increases, leading to significant heat accumulation. The inclusion of a frame around the cell provides structural strength to the cell assembly, significantly reducing the risk of bending and deformation under prolonged sunlight, ensuring the assembly's power generation performance.

[0013] For portable battery cell assemblies, it can effectively improve the situation where the battery cell assembly cannot be properly stored and folded due to thermal deformation, thereby improving the convenience of user operation.

[0014] As you can understand, cells are typically crystalline silicon solar cells, which have a small curvature and are fragile. Providing a frame around the cell's perimeter reduces the risk of cell breakage due to thermal deformation of the cell assembly, extending the life of the cell assembly and ensuring the power generation efficiency of the photovoltaic device.

[0015] In addition, compared with the related art of using glass fiber epoxy resin composite panels or aluminum alloy panels on the back of solar panels, it can reduce the weight of the battery cell assembly while ensuring that the battery cell assembly has a certain structural strength, thereby improving the convenience of user carrying and use.

[0016] At least a portion of the frame comprises a reinforced fiber material and a polyurethane material. This means the frame is made of these materials, resulting in excellent acid, alkali, and salt resistance, increased structural strength and toughness, and excellent bending strength and elastic modulus. This provides a stable structure and good thermal stability, making it less susceptible to bending and deformation under sunlight exposure. This meets the mechanical performance requirements for portable battery cell module frames, thereby reducing deformation of the battery cell module under prolonged sunlight exposure. Furthermore, the frame is relatively lightweight, making it easy for users to carry and use.

[0017] Optionally, the polyurethane material includes a polyurethane resin. Specifically, polyester polyol as a soft segment, diisocyanate as a hard segment, and a small molecule polyol as a chain extender, wherein the polyester polyol, diisocyanate, and small molecule polyol are alternately connected and copolymerized to form a block copolymer, i.e., the polyurethane resin.

[0018] In addition, the battery cell assembly provided by the above technical solution of this application also has the following additional technical features:

[0019] In some technical solutions, optionally, the mass fraction of the reinforcing fiber material is 70% to 80%, and the mass fraction of the polyurethane material is 20% to 30%.

[0020] In this technical solution, it can be understood that if the mass fraction of the reinforcing fiber material is large, that is, the mass fraction of the reinforcing fiber material is greater than 80%, the mass fraction of the polyurethane material will be reduced accordingly, and the reinforcing fiber material cannot be effectively filled, resulting in an uneven appearance of the frame and affecting the aesthetics.

[0021] Moreover, since the polyurethane material cannot effectively fill the reinforcing fiber material, it can also lead to uneven overall structural strength and toughness of the frame, affecting the service life of the frame.

[0022] If the mass fraction of the reinforcing fiber material is small, that is, the mass fraction of the reinforcing fiber material is less than 70%, the overall structural strength of the frame is poor, and it is easy to deform under long-term light conditions of the battery cell assembly, affecting the storage of the battery cell assembly, and easily causing the battery cell to break, affecting the power generation performance of the battery cell assembly.

[0023] By limiting the mass fraction of the reinforcing fiber material and the polyurethane material, the frame can have a certain toughness while ensuring the strength of the frame structure, thereby extending the service life of the frame and the battery cell assembly.

[0024] In some technical solutions, optionally, the reinforcing fiber material includes a plurality of fiber yarn bundles; wherein the diameter d of at least one fiber yarn bundle satisfies 16 mm ≤ d ≤ 24 mm; and / or the linear density p of at least one fiber yarn bundle satisfies 1200 tex / (g / km) ≤ p ≤ 4800 tex / (g / km); and / or the gram weight G of at least one fiber yarn bundle satisfies 150 g / m 2 ≤G≤300g / m 2 .

[0025] In this technical solution, the reinforcing fiber material is defined as including multiple fiber yarn bundles. Specifically, the diameter of at least one fiber yarn bundle is between 16 mm and 24 mm, thereby ensuring that the polyurethane material can effectively fill and penetrate into the fiber yarn bundle to fix the fiber yarn bundle and form a whole, further improving the structural strength and toughness of the frame.

[0026] The linear density of at least one fiber yarn bundle is between 1200tex / (g / km) and 4800tex / (g / km), thereby ensuring that the polyurethane material can effectively fill and penetrate into the fiber yarn bundle to fix the fiber yarn bundle and form a whole, further improving the structural strength and toughness of the frame.

[0027] At least one fiber bundle has a weight of 150g / m 2 Up to 300g / m 2 .

[0028] In some technical solutions, optionally, the reinforcing fiber material includes glass fiber.

[0029] In some technical solutions, optionally, the glass fibers include untwisted alkali-free continuous glass fiber yarn bundles.

[0030] In this technical solution, the glass fiber is defined to include untwisted alkali-free continuous glass fiber yarn bundles, which can further enable the prepared frame to have good mechanical properties, prevent the frame from deformation, and thereby reduce the risk of deformation of the battery cell assembly under long-term lighting conditions, extend the service life of the battery cell assembly, and ensure the power generation effect of the battery cell assembly.

[0031] In some technical solutions, optionally, the polyurethane material includes a thermosetting polyurethane resin.

[0032] In some technical solutions, optionally, the frame includes a plurality of frame strips, which are sequentially connected end to end to enclose and form a receiving groove; wherein, at least one frame strip includes reinforced fiber material and polyurethane material.

[0033] In this technical solution, it is defined that the frame includes a plurality of frame bars. Specifically, the plurality of frame bars are sequentially connected end to end, so that the plurality of frame bars enclose and form a receiving groove to provide installation space for the battery cell.

[0034] At least one frame strip comprises a reinforced fiber material and a polyurethane material. This ensures excellent acid, alkali, and salt resistance, increases the strip's structural strength and toughness, and provides it with good flexural strength and flexural modulus. This provides a stable structure and good thermal stability, making it less susceptible to bending and deformation under sunlight exposure. This meets the mechanical performance requirements for portable battery module frames, thereby reducing deformation of the battery module under prolonged sunlight exposure. Furthermore, the strip is relatively lightweight, making it easy for users to carry and use.

[0035] In some technical solutions, optionally, the multiple frame bars include at least adjacent first and second frame bars; wherein, one of the first and second frame bars is provided with a protrusion, and the other of the first and second frame bars is provided with a slot, and the protrusion can be inserted into the slot.

[0036] This technical solution defines a plurality of frame bars, including at least a first and second adjacent frame bar. Specifically, the first frame bar is provided with a protrusion, and the second frame bar is provided with a slot. When connecting the first and second frame bars, the protrusion on the first frame bar is inserted into the slot of the second frame bar. In other words, any two adjacent frame bars in the plurality of frame bars are connected using a male and female mortise and tenon joint, which interlocks internally and prevents loosening, thereby ensuring the structural stability of the frame and the secure assembly.

[0037] It can be understood that the assembly reference surfaces of the battery cells are all facing the interior of the receiving groove.

[0038] Optionally, at least one frame strip is provided with a protrusion and a slot, which are respectively located at two ends of the frame strip, wherein the protrusion cooperates with the slot on an adjacent frame strip, and the slot cooperates with the protrusion on another adjacent frame strip.

[0039] Optionally, at least one frame strip is provided with two protrusions, and the two protrusions are respectively located at two ends of the frame strip.

[0040] Optionally, at least one frame strip is provided with two slots, which are respectively located at two ends of the frame strip. Specific arrangements can be made according to actual needs.

[0041] In some technical solutions, optionally, the frame includes a first frame and a second frame; wherein either the first frame or the second frame can rotate relative to the other, so that the battery cell assembly can switch between an expanded state and a folded state.

[0042] In this technical solution, the frame is defined to include a first frame and a second frame. Specifically, either the first frame or the second frame can be rotated relative to the other to place the battery cell assembly in an expanded state or a folded state. This ensures the power generation efficiency of the battery cell assembly while facilitating the carrying and use of the battery cell assembly, enabling the folding and storage of the battery cell assembly, and thereby improving user convenience.

[0043] According to the second aspect of the present application, a photovoltaic device is provided, comprising a cell assembly as provided by any of the above technical solutions, thereby possessing all the beneficial technical effects of the cell assembly, which will not be described in detail here.

[0044] Furthermore, the photovoltaic device also includes a first plate; a first adhesive film layer, arranged between the light-receiving side of the cell assembly and the first plate; a second adhesive film layer and a second plate, the second adhesive film layer being arranged between the backlight side of the cell assembly and the second plate.

[0045] The photovoltaic device provided in the embodiments of the present application includes a cell assembly, a first plate, a second plate, a first adhesive film layer, and a second adhesive film layer. Specifically, the first adhesive film layer is located between the first plate and the light-receiving side of the cell assembly, and the second adhesive film layer is located between the second plate and the backlight side of the cell assembly. In other words, along the thickness direction of the cell assembly, the first plate, the first adhesive film layer, the cell assembly, the second adhesive film layer, and the second plate are stacked in sequence.

[0046] In addition, the photovoltaic device provided by the above technical solution of this application also has the following additional technical features:

[0047] In some technical solutions, optionally, the photovoltaic device further includes a handle, which is provided on the frame and at least partially exposed from the first plate and the second plate.

[0048] In this technical solution, it is defined that the photovoltaic device also includes a handle. Specifically, the handle is arranged on the frame, and at least a portion of the handle is exposed from the first plate and the second plate, so that the user can fold, store and carry the battery cell assembly by operating the handle, further improving the user's convenience in using the battery cell assembly.

[0049] Optionally, the handle and the frame are an integrated structure.

[0050] Additional aspects and advantages of the present application will be given in the following description, and in part will become obvious from the following description, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0052] FIG1 shows one of the structural schematic diagrams of a battery cell assembly according to an embodiment of the present application;

[0053] FIG2 shows a cross-sectional view of a frame according to an embodiment of the present application;

[0054] FIG3 shows a second structural schematic diagram of a battery cell assembly according to an embodiment of the present application;

[0055] FIG4 shows a schematic structural diagram of a frame according to an embodiment of the present application;

[0056] FIG5 shows one of the structural schematic diagrams of a frame strip according to an embodiment of the present application;

[0057] FIG6 shows a second structural schematic diagram of a frame strip according to an embodiment of the present application;

[0058] FIG7 shows a third structural schematic diagram of a frame strip according to an embodiment of the present application;

[0059] FIG8 shows a fourth structural schematic diagram of a frame strip according to an embodiment of the present application;

[0060] FIG9 shows a schematic structural diagram of a photovoltaic device according to an embodiment of the present application.

[0061] Among them, the correspondence between the figure marks and component names in Figures 1 to 9 is: 100 battery cell assembly, 110 battery cell, 120 frame, 121 receiving groove, 122 reinforcing fiber material, 123 polyurethane material, 124 fiber yarn bundle, 130 frame bar, 131 first frame bar, 132 second frame bar, 140 protrusion, 150 slot, 160 first frame body, 170 second frame body, 300 photovoltaic device, 310 first plate body, 320 first film layer, 330 second film layer, 340 second plate body, 350 handle. DETAILED DESCRIPTION

[0062] In order to more clearly understand the above-mentioned objects, features and advantages of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other in the absence of conflict.

[0063] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0064] The following describes a cell assembly 100 and a photovoltaic device 300 provided according to some embodiments of the present application with reference to FIG. 1 to FIG. 9 .

[0065] In one embodiment of the present application, as shown in Figures 1, 2 and 4, a battery cell assembly 100 is proposed, which includes: a battery cell 110, which can convert light energy into electrical energy; a frame 120, which is provided with a receiving groove 121, and the battery cell 110 is arranged in the receiving groove 121; wherein, at least a portion of the frame 120 includes a reinforced fiber material 122 and a polyurethane material 123.

[0066] The battery cell assembly 100 provided in the embodiment of the present application includes a battery cell 110 and a frame 120 . Specifically, the frame 120 is provided with a receiving groove 121 , and the battery cell 110 is disposed in the receiving groove 121 . That is, the frame 120 is provided on the periphery of the battery cell 110 .

[0067] The cell 110 converts light energy into electrical energy. Under prolonged sunlight, the cell 110's large surface area receives heat, leading to significant heat accumulation. The frame 120 provided around the cell 110 provides structural strength to the cell assembly 100, significantly reducing the risk of bending or deformation under prolonged sunlight, ensuring the cell assembly's power generation performance.

[0068] For the portable battery cell assembly 100, the problem of the battery cell assembly 100 being unable to be normally stored and folded due to thermal deformation can be effectively improved, thereby improving the convenience of user operation.

[0069] It is understood that the cell 110 is generally a crystalline silicon solar cell, which has a small curvature and is fragile. Providing a frame 120 around the periphery of the cell 110 can also reduce the risk of cell 110 breakage due to thermal deformation of the cell assembly 100, thereby extending the service life of the cell assembly 100 and ensuring the power generation efficiency of the photovoltaic device 300.

[0070] In addition, compared with the related art of using glass fiber epoxy resin composite board or aluminum alloy board on the back of the solar panel, it can reduce the weight of the battery cell assembly 100 while ensuring that the battery cell assembly 100 has a certain structural strength, thereby improving the convenience of user carrying and use.

[0071] At least a portion of the frame 120 includes a reinforced fiber material 122 and a polyurethane material 123. This means that the frame 120 is made of the reinforced fiber material 122 and the polyurethane material 123, resulting in excellent acid, alkali, and salt resistance. This increases the structural strength and toughness of the frame 120, providing it with good bending strength and flexural modulus. This results in a stable structure and good thermal stability, making it less susceptible to bending and deformation under sunlight exposure. This meets the mechanical performance requirements for the frame 120 of the portable battery cell assembly 100 under operating conditions, thereby reducing deformation of the battery cell assembly 100 under prolonged sunlight exposure. Furthermore, the frame 120 is relatively lightweight, making it easy for users to carry and use.

[0072] Optionally, the polyurethane material 123 includes a polyurethane resin, specifically, polyester polyol as a soft segment, diisocyanate as a hard segment, and a small molecule polyol as a chain extender, wherein the polyester polyol, diisocyanate, and small molecule polyol are alternately connected and copolymerized to form a block copolymer, i.e., the polyurethane resin.

[0073] In some embodiments, optionally, the mass fraction of the reinforcing fiber material 122 is 70% to 80%, and the mass fraction of the polyurethane material 123 is 20% to 30%.

[0074] In this embodiment, it can be understood that if the mass fraction of the reinforcing fiber material 122 is large, that is, the mass fraction of the reinforcing fiber material 122 is greater than 80%, the mass fraction of the polyurethane material 123 is correspondingly reduced, and the reinforcing fiber material 122 cannot be effectively filled, resulting in an uneven appearance of the frame 120, affecting the aesthetics.

[0075] Moreover, since the polyurethane material 123 cannot effectively fill the reinforcing fiber material 122 , it may also lead to uneven overall structural strength and toughness of the frame 120 , affecting the service life of the frame 120 .

[0076] If the mass fraction of the reinforcing fiber material 122 is small, that is, the mass fraction of the reinforcing fiber material 122 is less than 70%, the overall structural strength of the frame 120 is poor, and it is easy to deform under long-term light conditions of the battery cell assembly 100, affecting the storage of the battery cell assembly 100, and easily causing the battery cell 110 to break, affecting the power generation performance of the battery cell assembly 100.

[0077] By limiting the mass fractions of the reinforcing fiber material 122 and the polyurethane material 123 , the frame 120 can have a certain toughness while ensuring the structural strength of the frame 120 , thereby extending the service life of the frame 120 and the battery cell assembly 100 .

[0078] In some embodiments, optionally, the reinforcing fiber material 122 includes a plurality of fiber yarn bundles 124; wherein the diameter d of at least one fiber yarn bundle 124 satisfies 16 mm ≤ d ≤ 24 mm; and / or the linear density p of at least one fiber yarn bundle 124 satisfies 1200 tex / (g / km) ≤ p ≤ 4800 tex / (g / km); and / or the gram weight G of at least one fiber yarn bundle 124 satisfies 150 g / m 2 ≤G≤300g / m 2 .

[0079] In this embodiment, the reinforced fiber material 122 is defined to include multiple fiber yarn bundles 124. Specifically, the diameter of at least one fiber yarn bundle 124 is between 16 mm and 24 mm, thereby ensuring that the polyurethane material 123 can effectively fill and penetrate into the fiber yarn bundle 124 to fix the fiber yarn bundle 124 and form a whole, thereby further improving the structural strength and toughness of the frame 120.

[0080] The linear density of at least one fiber yarn bundle 124 is between 1200 tex / (g / km) and 4800 tex / (g / km), thereby ensuring that the polyurethane material 123 can effectively fill and penetrate into the fiber yarn bundle 124 to fix the fiber yarn bundle 124 and form a whole, further improving the structural strength and toughness of the frame 120.

[0081] At least one fiber yarn bundle 124 has a gram weight of 150 g / m 2 Up to 300g / m 2 .

[0082] In some embodiments, the reinforcing fiber material 122 optionally includes glass fibers.

[0083] In a specific embodiment, the specific preparation process of the frame is as follows:

[0084] Step 1: The glass reinforced fiber is pulled into the yarn guide plate;

[0085] Step 2: Inject liquid polyurethane resin into the plastic box to impregnate the glass fiber;

[0086] The third step: the glass fiber impregnated with polyurethane enters the mold and undergoes high-temperature preforming and curing;

[0087] Step 4: Pre-shape and form the cured polyurethane fiberglass composite material;

[0088] Step 5: Cutting, processing and cleaning the polyurethane glass fiber composite material to form a frame of a portable solar panel.

[0089] In this embodiment, specifically, the continuous glass fiber yarn is passed through the yarn guide plate and is pulled into the glue injection box, and the polyurethane resin is injected into the glue injection penetration area of ​​the glue injection box at high pressure, so that the glass fiber located in the glue injection penetration area is completely soaked by the high-pressure polyurethane resin, and then enters the mold. The mold includes a preforming area and a curing area. The head of the glass fiber moves under the traction of the traction device, so that the glass fiber soaked in the polyurethane resin moves to the preforming area under the traction action for heating to obtain a preformed glass fiber reinforced composite material; with the continuous traction force generated by the traction device, the preformed glass fiber reinforced composite material is cured and formed in the curing area and then pulled out to the outside of the mold for pre-forming, and continues to be pulled forward, and then cut, and finally processed and cleaned according to the requirements of the portable solar module frame design drawing.

[0090] The polyurethane glass fiber composite pultruded profile is integrally formed, with low production energy consumption and no exhaust gas discharge. The polyurethane glass fiber composite pultruded profile has excellent acid, alkali and salt resistance, which ensures the service life of the composite material frame.

[0091] The polyurethane glass fiber composite pultruded profile is reinforced with glass fiber in the extension direction of the frame and toughened with polyurethane resin. Its force direction and force intensity can be freely designed, so that the polyurethane glass fiber composite pultruded profile has better bending strength and bending elastic modulus, meeting the mechanical performance requirements of the working conditions of the portable solar panel frame and achieving the optimal material ratio.

[0092] In some embodiments, the glass fibers optionally include untwisted alkali-free continuous glass fiber yarn bundles 124 .

[0093] In this embodiment, the glass fiber is defined to include an untwisted alkali-free continuous glass fiber yarn bundle 124, which can further enable the prepared frame 120 to have good mechanical properties, prevent the frame 120 from deformation, and thereby reduce the risk of deformation of the battery cell assembly 100 under long-term lighting conditions, extend the service life of the battery cell assembly 100, and ensure the power generation effect of the battery cell assembly 100.

[0094] In some embodiments, the polyurethane material 123 optionally includes a thermosetting polyurethane resin.

[0095] As shown in Figures 4, 5, 6, 7 and 8, in some embodiments, optionally, the frame 120 includes a plurality of frame strips 130, and the plurality of frame strips 130 are sequentially connected end to end to enclose a receiving groove 121; wherein, at least one frame strip 130 includes a reinforced fiber material 122 and a polyurethane material 123.

[0096] In this embodiment, the frame 120 is defined to include a plurality of frame bars 130 . Specifically, the plurality of frame bars 130 are sequentially connected end to end, so that the plurality of frame bars 130 enclose a receiving groove 121 to provide an installation space for the battery cell 110 .

[0097] At least one frame strip 130 includes a reinforcing fiber material 122 and a polyurethane material 123. This means that the at least one frame strip 130 is made of the reinforcing fiber material 122 and the polyurethane material 123, resulting in excellent acid, alkali, and salt resistance. This increases the structural strength and toughness of the frame strip 130, resulting in excellent bending strength and flexural modulus. This provides a stable structure and good thermal stability, making it less susceptible to bending and deformation under sunlight exposure. This meets the mechanical performance requirements of the portable battery cell assembly 100 frame 120 under operating conditions, thereby reducing deformation of the battery cell assembly 100 under prolonged sunlight exposure. Furthermore, the frame strip 130 is relatively lightweight, making it easy for users to carry and use.

[0098] As shown in Figure 4, in some embodiments, optionally, multiple frame strips 130 include at least adjacent first frame strips 131 and second frame strips 132; wherein, one of the first frame strip 131 and the second frame strip 132 is provided with a protrusion 140, and the other of the first frame strip 131 and the second frame strip 132 is provided with a slot 150, and the protrusion 140 can be inserted into the slot 150.

[0099] In this embodiment, the plurality of frame strips 130 are defined as comprising at least a first adjacent frame strip 131 and a second adjacent frame strip 132. Specifically, the first frame strip 131 is provided with a protrusion 140, and the second frame strip 132 is provided with a slot 150. When the first frame strip 131 and the second frame strip 132 are connected, the protrusion 140 on the first frame strip 131 is inserted into the slot 150 of the second frame strip 132. In other words, any two adjacent frame strips 130 among the plurality of frame strips 130 are connected using a male and female mortise and tenon connection method, with the internal rings interlocking and not easily loosened, thereby ensuring the structural stability of the frame 120 and the firmness of the assembly.

[0100] It is understandable that the assembly reference surfaces of the battery cell 110 are all facing the interior of the receiving groove 121 .

[0101] Optionally, at least one frame strip 130 is provided with a protrusion 140 and a slot 150, which are respectively located at both ends of the frame strip 130, wherein the protrusion 140 cooperates with the slot 150 on the adjacent frame strip 130, and the slot 150 cooperates with the protrusion 140 on another adjacent frame strip 130.

[0102] Optionally, at least one frame strip 130 is provided with two protrusions 140 , and the two protrusions 140 are respectively located at two ends of the frame strip 130 .

[0103] Optionally, at least one frame strip 130 is provided with two slots 150, and the two slots 150 are respectively located at two ends of the frame strip 130. The specific arrangement can be made according to actual needs.

[0104] As shown in Figures 1, 3 and 4, in some embodiments, optionally, the frame 120 includes a first frame body 160 and a second frame body 170; wherein, either the first frame body 160 and the second frame body 170 can be rotated relative to the other so that the battery cell assembly 100 can be switched between an unfolded state and a folded state.

[0105] In this embodiment, the frame 120 is defined to include a first frame body 160 and a second frame body 170. Specifically, either the first frame body 160 or the second frame body 170 can be rotated relative to the other to place the battery cell assembly 100 in an unfolded state or a folded state. This ensures the power generation efficiency of the battery cell assembly 100 while facilitating the carrying and use of the battery cell assembly 100, thereby enabling the folding and storage of the battery cell assembly 100 and improving user convenience.

[0106] According to the second aspect of the present application, a photovoltaic device 300 is provided, comprising a cell assembly 100 as provided in any of the above embodiments, and thus possessing all the beneficial technical effects of the cell assembly 100, which will not be described in detail here.

[0107] As shown in Figure 9, the photovoltaic device 300 further includes a first plate 310; a first adhesive film layer 320, which is arranged between the light-receiving side of the battery cell assembly 100 and the first plate 310; a second adhesive film layer 330 and a second plate 340, and the second adhesive film layer 330 is arranged between the backlight side of the battery cell assembly 100 and the second plate 340.

[0108] The photovoltaic device 300 provided in the embodiment of the present application includes a cell assembly 100, a first plate 310, a second plate 340, a first adhesive film layer 320, and a second adhesive film layer 330. Specifically, the first adhesive film layer 320 is located between the first plate 310 and the light-receiving side of the cell assembly 100, and the second adhesive film layer 330 is located between the second plate 340 and the backlight side of the cell assembly 100. In other words, along the thickness direction of the cell assembly 100, the first plate 310, the first adhesive film layer 320, the cell assembly 100, the second adhesive film layer 330, and the second plate 340 are stacked in sequence.

[0109] As shown in FIG. 1 , FIG. 3 , FIG. 4 and FIG. 8 , in some embodiments, optionally, the photovoltaic device 300 further includes a handle 350 , which is provided on the frame 120 and at least partially exposed from the first plate 310 and the second plate 340 .

[0110] In this embodiment, it is defined that the photovoltaic device 300 also includes a handle 350. Specifically, the handle 350 is provided on the frame 120, and at least a portion of the handle 350 is exposed from the first plate 310 and the second plate 340, so that the user can fold, store and carry the battery cell assembly 100 by operating the handle 350, thereby further improving the user's convenience in using the battery cell assembly 100.

[0111] Optionally, the handle 350 and the frame 120 are an integral structure.

[0112] In this specification, the terms "connect," "install," and "fix" should be understood broadly. For example, "connect" can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a direct connection or an indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0113] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0114] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A battery cell assembly, characterized in that: include: A cell capable of converting light energy into electrical energy; A frame, wherein the frame is provided with a receiving groove, and the battery cell is arranged in the receiving groove; Wherein, at least a portion of the frame includes reinforced fiber material and polyurethane material.

2. The battery cell assembly according to claim 1, wherein: The mass fraction of the reinforcing fiber material is 70% to 80%, and the mass fraction of the polyurethane material is 20% to 30%.

3. The battery cell assembly according to claim 1, wherein: The reinforcing fiber material includes a plurality of fiber yarn bundles; The diameter d of at least one of the fiber yarn bundles satisfies 16 mm ≤ d ≤ 24 mm; and / or the linear density p of at least one of the fiber yarn bundles satisfies 1200 tex / (g / km) ≤ p ≤ 4800 tex / (g / km); and / or the gram weight G of at least one of the fiber yarn bundles satisfies 150 g / m 2 ≤G≤300g / m 2 .

4. The battery cell assembly according to claim 1, wherein: The reinforcing fiber material includes glass fiber.

5. The battery cell assembly according to claim 4, characterized in that: The glass fibers include untwisted alkali-free continuous glass fiber yarn bundles.

6. The battery cell assembly according to claim 1, wherein: The polyurethane material includes a thermosetting polyurethane resin.

7. The battery cell assembly according to any one of claims 1 to 6, characterized in that: The frame includes a plurality of frame strips, and the plurality of frame strips are sequentially connected end to end to enclose and form the receiving groove; Wherein, at least one of the frame strips comprises the reinforcing fiber material and the polyurethane material.

8. The battery cell assembly according to claim 7, characterized in that: The plurality of frame strips include at least a first frame strip and a second frame strip that are adjacent to each other; Wherein, one of the first frame bar and the second frame bar is provided with a protrusion, and the other of the first frame bar and the second frame bar is provided with a slot, and the protrusion can be inserted into the slot.

9. The battery cell assembly according to any one of claims 1 to 6, characterized in that: The frame includes a first frame body and a second frame body; Wherein, either the first frame or the second frame can rotate relative to the other, so that the battery cell assembly can be switched between an unfolded state and a folded state.

10. A photovoltaic device, characterized in that: include: The battery cell assembly according to any one of claims 1 to 9; a first plate; A first adhesive film layer is provided between the light-receiving side of the cell assembly and the first plate; A second adhesive film layer and a second plate body, wherein the second adhesive film layer is provided between the backlight side of the battery cell assembly and the second plate body.

11. The photovoltaic device according to claim 10, characterized in that: Also includes: A handle is provided on the frame and is at least partially exposed from the first plate body and the second plate body.

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