Battery assembly and photovoltaic system

Abstract

The utility model is suitable for the technical field of solar cells, and provides a cell module and a photovoltaic system. The battery assembly comprises a battery laminating piece and an injection molding structure, the injection molding structure is formed based on an injection molding process and is connected with the battery laminating piece into a whole based on the injection molding process, and the injection molding structure is located outside the battery laminating piece and packages the battery laminating piece. Therefore, since the injection molding structure is formed based on the injection molding process and is connected with the battery laminated piece into a whole based on the injection molding process, the packaging of the battery laminated piece can be realized by utilizing the injection molding structure formed by curing based on the injection molding process, so that the packaging process is simpler and more convenient, and the improvement of the manufacturing efficiency of the battery assembly is facilitated.

Description

Technical Field

[0001] The present application belongs to the technical field of solar cells, and in particular to a battery assembly and a photovoltaic system. Background Art

[0002] Solar cell power generation is a sustainable source of clean energy. It uses the photovoltaic effect of semiconductor pn junction to convert sunlight into electrical energy.

[0003] A plurality of solar cells are connected to form a battery string, and the battery string is laminated together with a front plate, a back plate and an adhesive film to form a battery laminate. The battery laminate is packaged to form a battery assembly. However, the packaging process of the battery assembly in the related art is relatively cumbersome, resulting in low production efficiency of the battery assembly.

[0004] Based on this, how to design battery components to improve the manufacturing efficiency of battery components has become an urgent problem to be solved. Utility Model Content

[0005] The present application provides a battery assembly and a photovoltaic system, aiming to solve the problem of how to design the battery assembly to improve the manufacturing efficiency of the battery assembly.

[0006] The battery assembly provided in the present application includes a battery laminate and an injection molding structure. The injection molding structure is formed based on an injection molding process and is integrated with the battery laminate based on the injection molding process. The injection molding structure is located outside the battery laminate and encapsulates the battery laminate.

[0007] Specifically, the injection molding structure includes a parts portion, and the parts portion includes at least one of a frame, a mounting bracket, and a mounting block.

[0008] Specifically, the battery assembly includes an accessory, and the injection molding structure includes a connecting portion, which is at least partially located between the battery laminate and the accessory to fix the relative position of the battery laminate and the accessory.

[0009] Specifically, the accessories include at least one of a junction box, an inverter, and an optimizer.

[0010] Specifically, a connecting layer is provided between the connecting area on the surface of the accessory and the connecting portion.

[0011] Specifically, the injection molding structure includes a thermoplastic packaging structure, and the thermoplastic injection molding structure includes a polypropylene structure, a polyamide structure, a polyphenylene ether structure or a polyphenylene sulfide structure;

[0012] Alternatively, the connecting portion comprises a thermosetting encapsulation structure, and the thermosetting injection molding structure comprises a polyurethane structure.

[0013] Specifically, the battery assembly includes a buffer structure, which is at least partially located between the injection molded structure and the battery laminate.

[0014] Specifically, a protective coating is provided on the surface of the package.

[0015] The photovoltaic system provided in the present application includes any one of the above-mentioned battery components.

[0016] The battery assembly and photovoltaic system of the embodiments of the present application have an injection molding structure formed based on an injection molding process and connected to the battery laminate based on the injection molding process. Therefore, the battery laminate can be packaged using the injection molding structure formed by curing based on the injection molding process, which makes the packaging process simpler and helps to improve the production efficiency of the battery assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic flow chart of a method for manufacturing a battery assembly according to an embodiment of the present application;

[0018] Figure 2 is a schematic structural diagram of a battery assembly manufactured by a method for manufacturing a battery assembly according to an embodiment of the present application;

[0019] Figure 3 is a schematic flow chart of a method for manufacturing a battery assembly according to an embodiment of the present application;

[0020] Figure 4 is a schematic flow chart of a method for manufacturing a battery assembly according to an embodiment of the present application;

[0021] Figure 5 yes Figure 2 Schematic diagram of the structure of part A of a battery assembly;

[0022] Figure 6 is a schematic flow chart of a method for manufacturing a battery assembly according to an embodiment of the present application;

[0023] Figure 7 is a schematic flow chart of a method for manufacturing a battery assembly according to an embodiment of the present application;

[0024] Figure 8 is a schematic flow chart of a method for manufacturing a battery assembly according to an embodiment of the present application;

[0025] Fig. 9 is a schematic flow chart of a method for manufacturing a battery assembly according to an embodiment of the present application;

[0026] Fig.10 is a schematic flow chart of a method for manufacturing a battery assembly according to an embodiment of the present application;

[0027] Fig.11is a schematic structural diagram of a battery assembly manufactured by a method for manufacturing a battery assembly according to an embodiment of the present application;

[0028] Fig.12 is a schematic flow chart of a method for manufacturing a battery assembly according to an embodiment of the present application;

[0029] Description of main component symbols:

[0030] Battery assembly 100 , battery laminate 10 , injection molding structure 20 , component portion 21 , connection portion 22 , accessory 30 , buffer structure 40 . DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. 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 with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be construed as limiting the present application. In addition, it should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application.

[0032] In the description of the present application, it should be understood that the terms "length", "width", "up", "down", "left", "right", "horizontal", "top", "bottom", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to 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 application.

[0033] 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. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0034] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0035] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0036] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, and does not indicate the relationship between the various embodiments and / or settings discussed in itself. In addition, the various specific processes and examples of materials provided by the present application, but those of ordinary skill in the art can be aware of the application of other processes and / or the use scenarios of other materials.

[0037] In the present application, since the injection molding structure is formed based on the injection molding process and is connected to the battery laminate based on the injection molding process, the injection molding structure formed by curing based on the injection molding process can be used to realize the packaging of the battery laminate, making the packaging process simpler and helping to improve the manufacturing efficiency of the battery assembly.

[0038] Embodiment 1

[0039] See also Figure 1 and Figure 2 The manufacturing method of the battery assembly 100 of the embodiment of the present application includes:

[0040] Step S11: providing a battery laminate 10;

[0041] Step S12: placing the battery laminate 10 into a mold;

[0042] Step S16: injecting the first flow dynamic material into the mold;

[0043] Step S17: solidify the first flow dynamic material, form an injection molding structure 20 outside the battery laminate 10, encapsulate the battery laminate 10, and form a battery assembly 100.

[0044] In the manufacturing method of the battery assembly 100 of the embodiment of the present application, since the injection molding structure 20 is formed based on the injection molding process and is connected with the battery laminate 10 based on the injection molding process, the injection molding structure 20 formed by curing based on the injection molding process can be used to realize the packaging of the battery laminate 10, making the packaging process simpler and helping to improve the manufacturing efficiency of the battery assembly 100.

[0045] Specifically, before step S11, the battery cells may be welded with welding tape to form a battery string, which is then laminated together with the front plate, the back plate and the adhesive film to form the battery laminate 10. It is understood that in other embodiments, the welding tape, the battery cells, the front plate, the back plate and the adhesive film may be laminated together, and the welding tape and the battery cells may be welded during lamination to form the battery laminate 10.

[0046] Specifically, in step S11, the battery laminate 10 may be a rigid laminate or a flexible laminate. The specific form of the battery laminate 10 is not limited herein.

[0047] Specifically, in step S12, the battery laminate 10 can be placed in the mold cavity. In this way, the battery laminate 10 is positioned by the mold cavity to prevent the battery laminate 10 from moving during the injection molding process, so that the formed injection molding structure 20 can package the battery laminate 10 more accurately.

[0048] Specifically, in step S16, the first flow state material includes at least one of a thermoplastic material and a thermosetting material.

[0049] Specifically, in step S17 , the injection-molded structure 20 refers to a structure formed based on an injection molding process.

[0050] Specifically, in step S17, the injection molding structure 20 encapsulates the battery laminate 10, and the injection molding structure 20 may encapsulate the battery laminate 10 by replacing other parts of the battery assembly 100; the injection molding structure 20 may encapsulate the battery laminate 10 by connecting the accessories 30 of the battery laminate 10; or the injection molding structure 20 may encapsulate the battery laminate 10 by covering a part or all of the battery laminate 10. In other words, as long as a solid injection molding structure 20 is formed outside the battery laminate 10, the encapsulation of the battery laminate 10 can be achieved, regardless of the position of the injection molding structure 20 outside the battery laminate 10, the size of the injection molding structure 20, and the function of the injection molding structure 20. The specific manner in which the injection molding structure 20 encapsulates the battery laminate 10 is not limited herein.

[0051] It can be understood that encapsulating the battery laminate 10, or in other words, setting the encapsulated structure outside the battery laminate 10, at least two steps are required: determining the position of the structure in the battery laminate 10 and fixing the structure to the battery laminate 10. In the present application, since the injection molded structure 20 is formed by the injection molding process, the injection molded structure 20 can be formed on the outside of the battery laminate 10 only by curing after injecting the fluidized material, without the need to use manual or mechanical means to position the injection molded structure 20 in the battery laminate 10 and fix the injection molded structure 20 to the battery laminate 10, which can reduce the participation of manual or complex machinery, making the encapsulation more convenient, and is conducive to improving the efficiency of the battery assembly 100. Moreover, there are usually multiple structures for encapsulating the battery laminate 10. The present application can use the injection molding process to form the injection molded structure 20 at one time, replacing the multiple structures for encapsulating the battery laminate 10 in the related art, so that each structure used for encapsulation does not need to be positioned and fixed, which can further improve the efficiency of making the battery assembly 100.

[0052] Embodiment 2

[0053] See also Figure 3 In some embodiments, the injection molding structure 20 includes a part portion 21, the mold includes a part cavity, and step S16 includes:

[0054] Step S161: injecting a first flow dynamic material into the part cavity;

[0055] Step S17 includes:

[0056] Step S171 : solidifying the first flow dynamic material in the component cavity to form the component portion 21 .

[0057] In this way, there is no need to assemble independent parts to the battery laminate 10 , but the part portion 21 formed by injection molding and connected to the battery laminate 10 as a whole by injection molding is used as a part, which is beneficial to improving the manufacturing efficiency of the battery assembly 100 .

[0058] Specifically, the component part 21 refers to a portion of the injection molding structure 20 that is a component of the battery assembly 100. The component part 21 is part or all of the injection molding structure 20 in structure, and realizes the function of a component of the battery assembly 100 in function.

[0059] Specifically, the number of the component parts 21 may be 1, 2, 3 or other numbers. It is understood that when there are multiple component parts 21, multiple component parts 21 may be formed by a single injection molding process. In this way, multiple component parts 21 may be integrated into one injection molding structure 20 to form an integral part at one time, which is conducive to further improving the manufacturing efficiency of the battery assembly 100.

[0060] Specifically, the part cavity refers to a cavity in the mold corresponding to the part portion 21. The first flow material contained in the part cavity forms the part portion 21 after solidification.

[0061] Specifically, in step S161, the first fluid material may be directly injected into the part cavity through an injection port provided in the part cavity, or may be injected through an injection port of a mold, and the injected first fluid material flows into the part cavity.

[0062] Specifically, in step S171, the first flow dynamic material in the part cavity may be cured alone or together with other first flow dynamic materials, which is not limited here.

[0063] Embodiment 3

[0064] In some embodiments, the component part 21 includes at least one of a frame, a mounting bracket, and a mounting block. In other words, the component part 21 includes one or more of a frame, a mounting bracket, and a mounting block.

[0065] In this way, various forms of parts 21 are provided, which can replace various parts of the battery assembly 100, which is conducive to adapting to more actual production scenarios.

[0066] In one example, the component part 21 includes a frame; in another example, the component part 21 includes a frame and a mounting block; in yet another example, the component part 21 includes a frame, a mounting bracket, and a mounting block. The specific form of the component part 21 is not limited here.

[0067] exist Figure 2 In the example of , the part 21 includes a frame, and the frame surrounds the battery laminate 10. In this way, the frame is formed by injection molding, and there is no need to fix the frame in the related art to the battery laminate 10 by screws, etc., so that the packaging efficiency of the battery laminate 10 is higher.

[0068] Embodiment 4

[0069] See also Figure 4 , Figure 2 and Figure 5 In some embodiments, the injection molding structure 20 includes a connecting portion 22, and the mold includes a connecting cavity. Before step S16, the manufacturing method includes:

[0070] Step S141: providing an accessory 30 of a battery laminate 10;

[0071] Step S143: placing the accessory 30 into the mold;

[0072] Step S16 includes:

[0073] Step S162: injecting a first flow dynamic material into the connecting cavity;

[0074] Step S17 includes:

[0075] Step S172 : solidifying the first fluid dynamic material to form a connecting portion 22 , wherein the connecting portion 22 is at least partially located between the battery laminate 10 and the accessory 30 to fix the relative position of the battery laminate 10 and the accessory 30 .

[0076] In this way, the connection portion 22 of the injection-molded structure 20 formed by solidification can be used to fix the battery laminate 10 and the accessory 30 , without manually fixing the accessory 30 to the battery laminate 10 , which is beneficial to improving the manufacturing efficiency of the battery assembly 100 .

[0077] Specifically, the number of the accessories 30 may be one or more. In the case where the number of the accessories 30 is multiple, the multiple accessories 30 may be placed in a mold, and the connection portion 22 between the battery laminate 10 and the multiple accessories 30 may be formed at one time by an injection molding process, thereby reducing assembly steps and further improving manufacturing efficiency.

[0078] Specifically, the accessory 30 may be placed in the mold first, and then the battery laminate 10 may be placed in the mold; the battery laminate 10 may be placed in the mold first, and then the accessory 30 may be placed in the mold; or the accessory 30 and the battery laminate 10 may be placed in the mold at the same time. The order of step S143 and step S12 is not limited here.

[0079] Specifically, the connection portion 22 refers to a portion of the injection molded structure 20 that connects the battery laminate 10 and the accessory 30 of the battery laminate 10. The connection portion 22 may be part or all of the injection molded structure 20 in structure and functionally realizes the function of connection.

[0080] Specifically, the number of the connecting parts 22 may be 1, 2, 3 or other numbers. It is understood that when there are multiple connecting parts 22, multiple connecting parts 22 may be formed by a single injection molding process. In this way, multiple connecting parts 22 may be integrated into one injection molding structure 20 to form an integral part at one time, which is conducive to further improving the manufacturing efficiency of the battery assembly 100.

[0081] Specifically, the connection portion 22 is at least partially located between the battery laminate 10 and the accessory 30 , which means that part of the connection portion 22 is located between the battery laminate 10 and the accessory 30 , or the entire connection portion 22 is located between the battery laminate 10 and the accessory 30 .

[0082] Embodiment 5

[0083] In some embodiments, the accessory 30 includes at least one of a junction box, an inverter, and an optimizer. In other words, the accessory 30 includes one or more of a junction box, an inverter, and an optimizer.

[0084] In this way, various forms of accessories 30 that can be fixed to the battery laminate 10 using the connection portion 22 of the injection molding structure 20 are provided, which is conducive to adapting to more actual production scenarios.

[0085] For example, accessory 30 includes a junction box; in another example, accessory 30 includes a junction box and an inverter; in another example, accessory 30 includes a junction box, an inverter, and an optimizer.

[0086] exist Figure 2 In the example, the accessory 30 includes 3 junction boxes, Figure 5 Shown in FIG. 1 is one of the junction boxes.

[0087] Embodiment 6

[0088] See also Figure 6 In some embodiments, before step S143, the manufacturing method includes:

[0089] Step S142 : a connection layer is provided in the connection area on the surface of the accessory 30 , wherein the connection layer connects the accessory 30 and the connection portion 22 .

[0090] In this way, the surface of the accessory 30 is modified by using the connection layer, so that the accessory 30 and the connection portion 22 of the injection molding structure 20 are better bonded, which is beneficial to improving the sealing performance at the interface.

[0091] Specifically, the connection layer may be provided in a partial area of ​​the connection area, or in the entire area of ​​the connection area, and the connection layer may also extend beyond the connection area. The specific positional relationship between the connection layer and the connection area is not limited herein.

[0092] In some embodiments, a connection film may also be provided in the connection area on the surface of the battery laminate 10, and the connection film connects the battery laminate 10 and the component part 21. In this way, the battery laminate 10 and the component part 21 of the injection molding structure 20 are better bonded by the connection film, which is conducive to improving the sealing at the interface.

[0093] Specifically, the connection film may be provided in a partial area of ​​the connection region, or in the entire area of ​​the connection region, or the connection film may extend beyond the connection region. The specific positional relationship between the connection film and the connection region is not limited herein.

[0094] Embodiment 7

[0095] See also Figure 7 In some embodiments, step S142 includes:

[0096] Step S1421: applying adhesive to the connection area;

[0097] Step S1422: curing the adhesive to form a connecting layer.

[0098] In this way, by coating and curing the adhesive, a connection layer can be efficiently provided in the connection area on the surface of the accessory 30, which is beneficial to improving the production efficiency of the assembly and improving the bonding and sealing effects at the interface.

[0099] Specifically, in step S1421, the adhesive may be applied to a partial area of ​​the connection area, or may be applied to the entire area of ​​the connection area.

[0100] Specifically, in step S1421, the adhesive includes at least one of a silane coupling agent and a polyurethane. For example, the adhesive includes a silane coupling agent and a polyurethane; for another example, the adhesive includes a silane coupling agent; for another example, the adhesive includes a polyurethane.

[0101] Specifically, in step S1422, the accessory 30 coated with the adhesive may be placed for 3-30 minutes, such as 3 minutes, 5 minutes, 8 minutes, 10 minutes, 12 minutes, 15 minutes, 20 minutes, 25 minutes, and 30 minutes. In this way, the solvent evaporates, and no other treatment is required for the accessory 30, which is conducive to reducing costs.

[0102] Specifically, in step S1422, the adhesive may be heated. The heating temperature is 40°C-80°C. For example, 40°C, 42°C, 50°C, 60°C, 70°C, 78°C, 80°C. The heating time is 30s-5min. For example, 30s, 40s, 1min, 1.2min, 2min, 2.5min, 3min, 4min, 5min. In this way, curing can be accelerated, further improving the production efficiency of the assembly.

[0103] Embodiment 8

[0104] See also Figure 8 In some embodiments, the first fluid dynamic material comprises a thermoplastic material, and step S17 comprises:

[0105] Step S173 : Cooling the thermoplastic material in the mold to form an injection-molded structure 20 .

[0106] In this way, the thermoplastic material is used for injection molding, and the injection-molded structure 20 is formed by cooling, so that the solidification of the injection-molded structure 20 is relatively simple and does not require much processing, which is beneficial to improving the manufacturing efficiency of the component.

[0107] Specifically, before step S16, that is, before injecting the first fluid material into the mold, the thermoplastic material is heated so that the thermoplastic material becomes fluid and is easy to inject into the mold.

[0108] Embodiment 9

[0109] In some embodiments, the thermoplastic material includes at least one of polypropylene (PP), polyamide (PA), polyphenylene oxide (PPO) and polyphenylene sulfide (PPS). In other words, the thermoplastic material includes one or more of polypropylene (PP), polyamide (PA), polyphenylene oxide (PPO) and polyphenylene sulfide (PPS).

[0110] Thus, various forms of thermoplastic materials are provided, which is conducive to adapting to more actual production scenarios. Moreover, such thermoplastic materials make the injection molded structure 20 formed after curing have appropriate strength and connectivity, so that the injection molded structure 20 has a better packaging effect on the battery laminate 10.

[0111] For example, the thermoplastic material includes PP, and for another example, the thermoplastic material includes PA. For another example, the thermoplastic material includes PPO and PPS. The specific form of the thermoplastic material is not limited here.

[0112] Embodiment 10

[0113] See also Fig. 9 In some embodiments, the first fluid dynamic material includes a thermosetting material, and the thermosetting material includes isocyanate and polyol. Before step S16, the manufacturing method includes:

[0114] Step S15: mixing isocyanate and polyol to form a first-flow dynamic material.

[0115] In this way, curing is achieved through the reaction of isocyanate and polyol, and heating is not required to form the first-flow dynamic material, which is more convenient. Moreover, mixing the two thermosetting materials before injecting the first-flow dynamic material can avoid the difficulty in mixing or insufficient mixing of the materials after injecting them into the mold, so that the two thermosetting materials are mixed more fully, thereby ensuring the effect of reaction curing.

[0116] It will be appreciated that the injection molded structure 20 thus formed comprises a polyurethane structure.

[0117] Embodiment 11

[0118] See also Fig.10 and Fig.11 In some embodiments, before step S16, the manufacturing method includes:

[0119] Step S131: injecting a second flow material into the mold;

[0120] Step S132 : solidifying the second flow state material to form a buffer structure 40 , wherein the buffer structure 40 is at least partially located between the injection molding structure 20 and the battery laminate 10 .

[0121] In this way, the injection molding process can be used to form a buffer structure 40 between the battery laminate 10 and the injection molding structure 20. The buffer structure 40 can be used to relieve the stress of the battery laminate 10 and the injection molding structure 20, reduce the risk of structural damage, and help improve reliability.

[0122] In this embodiment, the mold for injecting the first fluid material and the mold for injecting the second fluid material are the same. In other words, after curing the second fluid material, it is not necessary to remove the battery laminate 10 with the buffer structure 40 from the mold and then inject the first fluid material into the mold.

[0123] It is understood that in other embodiments, the molds for injecting the first fluid material and the molds for injecting the second fluid material may be different. In other words, after the second fluid material is cured, the battery laminate 10 provided with the buffer structure 40 may be taken out of the mold, put into another mold, and then the first fluid material may be injected into the other mold.

[0124] Specifically, in step S131, the second fluid material may be a liquid material, a molten material, or a mixture of a liquid material and a molten material.

[0125] Specifically, in step S131, the second flow dynamic material includes at least one of TPU, TPE, and PVC.

[0126] Specifically, in step S131, the second fluid material is a soft material, and the buffer structure 40 formed by solidification is a soft structure, so that stress can be better relieved and the risk of structural damage can be reduced.

[0127] Specifically, in step S132, the explanation and description of curing the second fluid dynamic material may refer to the explanation and description of curing the first fluid dynamic material in the foregoing text, and will not be repeated here to avoid redundancy.

[0128] Specifically, in step S132 , the buffer structure 40 is at least partially located between the injection molded structure 20 and the battery laminate 10 , which means that part of the buffer structure 40 is located between the injection molded structure 20 and the battery laminate 10 , or the entire buffer structure 40 is located between the injection molded structure 20 and the battery laminate 10 .

[0129] Embodiment 12

[0130] See also Fig.12 In some embodiments, after step S17, the manufacturing method includes:

[0131] Step S18: providing a protective coating on the surface of the injection-molded structure 20 .

[0132] In this way, the protective coating can be used to protect the injection molded structure 20, which is beneficial to improving the reliability of the component.

[0133] Specifically, the protective coating includes at least one of a polyurethane coating and a fluorocarbon coating. In this way, the protective coating can block ultraviolet rays and protect the injection molded structure 20.

[0134] Specifically, the protective coating covers the entire area of ​​the surface of the injection molded structure 20 exposed from the battery laminate 10. In this way, the protective coating is as wide as possible and the protective effect is improved as much as possible. It is understood that the protective coating may also cover a partial area of ​​the surface of the injection molded structure 20 exposed from the battery laminate 10.

[0135] Embodiment 13

[0136] The battery assembly 100 of the embodiment of the present application is manufactured using the manufacturing method of the battery assembly 100 of any one of the first to twelfth embodiments.

[0137] The battery assembly 100 of the embodiment of the present application is manufactured by placing the battery laminate 10 into a mold, injecting the first flow dynamic material into the mold and curing it. Therefore, the battery laminate 10 can be packaged using the injection molding structure 20 formed by curing, which makes the packaging process simpler and helps to improve the manufacturing efficiency of the battery assembly 100.

[0138] In this embodiment, multiple solar cells in the battery assembly 100 can be connected in series in sequence to form a battery string, thereby realizing the series bus output of current. For example, the series connection of battery cells can be realized by setting welding strips (bus bars, interconnecting strips), conductive backplanes, etc.

[0139] It is understandable that in such an embodiment, the battery assembly 100 may also include a metal frame, a back plate, photovoltaic glass and an adhesive film. The adhesive film may be filled between the front and back of the solar cell and the photovoltaic glass, adjacent cells, etc. As a filler, it may be a transparent colloid with good light transmittance and aging resistance. For example, the adhesive film may be an EVA adhesive film or a POE adhesive film. The specific selection may be based on actual conditions and is not limited here.

[0140] Photovoltaic glass can cover the adhesive film on the front of the solar cell. The photovoltaic glass can be ultra-white glass, which has high light transmittance, high transparency, and excellent physical, mechanical and optical properties. For example, the light transmittance of ultra-white glass can reach more than 92%, which can protect the solar cell without affecting the efficiency of the solar cell as much as possible. At the same time, the adhesive film can bond the photovoltaic glass and the solar cell together. The presence of the adhesive film can seal and insulate the solar cell and make it waterproof and moisture-proof.

[0141] The backplane can be attached to the adhesive film on the back of the solar cell. The backplane can protect and support the solar cell and has reliable insulation, water resistance and aging resistance. There are multiple options for the backplane, which can usually be tempered glass, organic glass, aluminum alloy TPT composite adhesive film, etc. It can be set according to the specific situation and is not limited here. The whole composed of the backplane, solar cell, adhesive film and photovoltaic glass can be set on a metal frame. The metal frame serves as the main external support structure of the entire battery assembly 100 and can provide stable support and installation for the battery assembly 100. For example, the battery assembly 100 can be installed at the required installation position through the metal frame. The metal frame can also be omitted, for example, the injection molding structure including the frame is manufactured by the manufacturing method of this embodiment.

[0142] Embodiment 14

[0143] The battery assembly 100 of the embodiment of the present application includes a battery laminate 10 and an injection molding structure 20. The injection molding structure 20 is formed based on an injection molding process and is integrated with the battery laminate 10 based on the injection molding process. The injection molding structure 20 is located outside the battery laminate 10 to encapsulate the battery laminate 10.

[0144] In the battery assembly 100 of the embodiment of the present application, since the injection molding structure 20 is formed based on the injection molding process and is connected to the battery laminate 10 based on the injection molding process, the injection molding structure 20 formed by curing based on the injection molding process can be used to realize the packaging of the battery laminate 10, making the packaging process simpler and helping to improve the manufacturing efficiency of the battery assembly 100.

[0145] For the explanations and descriptions in the following text, please refer to the previous text. To avoid redundancy, we will not repeat them here.

[0146] Embodiment 15

[0147] In some embodiments, the injection molding structure 20 includes a component portion 21 , and the component portion 21 includes at least one of a frame, a mounting bracket, and a mounting block.

[0148] Embodiment 16

[0149] In some embodiments, the battery assembly 100 includes an accessory 30 , and the injection molded structure 20 includes a connecting portion 22 , which is at least partially located between the battery laminate 10 and the accessory 30 to fix the relative positions of the battery laminate 10 and the accessory 30 .

[0150] Embodiment 17

[0151] In some embodiments, the accessory 30 includes at least one of a junction box, an inverter, and an optimizer.

[0152] Embodiment 18

[0153] In some embodiments, a connection layer is provided between the connection area on the surface of the accessory 30 and the connection portion 22 .

[0154] Embodiment 19

[0155] In some embodiments, the injection molding structure 20 includes a thermoplastic packaging structure, and the thermoplastic injection molding structure 20 includes a polypropylene structure, a polyamide structure, a polyphenylene ether structure, or a polyphenylene sulfide structure;

[0156] Alternatively, the connection portion 22 includes a thermosetting encapsulation structure, and the thermosetting injection molding structure 20 includes a polyurethane structure.

[0157] Embodiment 20

[0158] In some embodiments, the battery assembly 100 includes a buffer structure 40 at least partially located between the injection molded structure 20 and the battery laminate 10 .

[0159] Embodiment 21

[0160] In some embodiments, the surface of the package is provided with a protective coating.

[0161] Embodiment 10

[0162] The photovoltaic system of the embodiment of the present application includes the battery assembly 100 of any one of the twelfth embodiment or the fourteenth to twenty-first embodiments.

[0163] In the photovoltaic system of the embodiment of the present application, since the battery laminate 10 is placed in a mold, the first flow dynamic material is injected into the mold and solidified when the battery assembly 100 is manufactured, the battery laminate 10 can be packaged using the injection molding structure 20 formed by the solidification, making the packaging process simpler and helping to improve the manufacturing efficiency of the battery assembly 100.

[0164] In this embodiment, the photovoltaic system can be applied to photovoltaic power stations, such as ground power stations, rooftop power stations, water power stations, etc., and can also be applied to equipment or devices that use solar energy to generate electricity, such as user solar power supplies, solar street lights, solar cars, solar buildings, etc. Of course, it can be understood that the application scenarios of the photovoltaic system are not limited to this, that is, the photovoltaic system can be applied in all fields that require solar energy to generate electricity. Taking the photovoltaic power generation system network as an example, the photovoltaic system may include a photovoltaic array, a junction box and an inverter. The photovoltaic array may be an array combination of multiple battery assemblies 100. For example, multiple battery assemblies 100 can form multiple photovoltaic arrays. The photovoltaic array is connected to the junction box. The junction box can converge the current generated by the photovoltaic array. The converged current flows through the inverter and is converted into the alternating current required by the mains power grid and then connected to the mains network to realize solar power supply.

[0165] In the description of this specification, the description with reference to the terms "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0166] In addition, the above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A battery assembly, characterized in that: The invention comprises a battery laminate and an injection molding structure, wherein the injection molding structure is formed based on an injection molding process and is integrated with the battery laminate based on the injection molding process; the injection molding structure is located outside the battery laminate and encapsulates the battery laminate.

2. The battery assembly according to claim 1, characterized in that: The injection molding structure includes a parts portion, and the parts portion includes at least one of a frame, a mounting bracket, and a mounting pressing block.

3. The battery assembly according to claim 1, characterized in that: The battery assembly includes an accessory, and the injection molding structure includes a connecting portion, which is at least partially located between the battery laminate and the accessory to fix the relative position of the battery laminate and the accessory.

4. The battery assembly according to claim 3, characterized in that: The accessories include at least one of a junction box, an inverter, and an optimizer.

5. The battery assembly according to claim 3, characterized in that: A connecting layer is provided between the connecting area on the surface of the accessory and the connecting portion.

6. The battery assembly according to claim 1, characterized in that: The injection molding structure includes a thermoplastic packaging structure, and the thermoplastic injection molding structure includes a polypropylene structure, a polyamide structure, a polyphenylene ether structure or a polyphenylene sulfide structure; Alternatively, the connecting portion comprises a thermosetting encapsulation structure, and the thermosetting injection molding structure comprises a polyurethane structure.

7. The battery assembly according to claim 1, characterized in that: The battery assembly includes a buffer structure at least partially located between the injection molded structure and the battery laminate.

8. The battery assembly according to claim 1, characterized in that: The surface of the package is provided with a protective coating.

9. A photovoltaic system, characterized in that: A battery assembly comprising any one of claims 1 to 8.

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