Method for producing battery assembly, frame and battery assembly

Abstract

The application provides a battery assembly production method, a frame and a battery assembly, and relates to the technical field of solar photovoltaic technology. The battery assembly production method comprises the following steps: providing a laminated precursor; the laminated precursor comprises a frame and a front cover plate, a front adhesive film, a battery piece, a rear adhesive film and a rear cover plate which are sequentially stacked; the frame comprises a first frame body and a second frame body, and the first frame body and the second frame body both comprise intersecting side walls and horizontal walls; the side walls of the first frame body are oppositely distributed with the side walls of the front cover plate, the horizontal walls of the first frame body are oppositely distributed with the light-receiving surface of the front cover plate, the side walls of the second frame body are oppositely distributed with the side walls of the rear cover plate, the horizontal walls of the second frame body are oppositely distributed with the back light surface of the rear cover plate, and the side walls of the first frame body and the side walls of the second frame body are mutually engaged; laminating the laminated precursor; and the frame does not deform under the laminating environment. The frame position accuracy can be guaranteed without placing a pressing frame and removing the pressing frame, and parallel connection caused by scratching the lead-out wire can be avoided.

Description

Technical Field

[0001] This invention relates to the field of solar photovoltaic technology, and in particular to a method for producing a battery module, a frame, and a battery module. Background Technology

[0002] In the production of battery modules, the existing process is roughly as follows: providing a module precursor, which includes a front cover plate, a front adhesive film, battery cells, a rear adhesive film, and a rear cover plate stacked in sequence; placing a pressure frame around the module precursor; laminating; removing the pressure frame; and installing the frame.

[0003] During their research on the aforementioned prior art, the inventors discovered that the production process of battery components involves numerous steps and has low production efficiency. Summary of the Invention

[0004] This invention provides a method for producing battery components, a frame, and a battery component, aiming to solve the problems of numerous processes and low production efficiency in the production of battery components.

[0005] According to a first aspect of the present invention, a method for manufacturing a battery assembly is provided, comprising the following steps:

[0006] A lamination precursor is provided; the lamination precursor includes: a frame, and a front cover plate, a front adhesive film, a battery cell, a rear adhesive film, and a rear cover plate stacked sequentially; the frame includes: a first frame and a second frame, both the first frame and the second frame including intersecting sidewalls and horizontal walls; in the lamination precursor: the sidewalls of the first frame are opposite to the sidewalls of the front cover plate, the horizontal walls of the first frame are opposite to the light-facing surface of the front cover plate, the sidewalls of the second frame are opposite to the sidewalls of the rear cover plate, the horizontal walls of the second frame are opposite to the backlight surface of the rear cover plate, and the sidewalls of the first frame and the sidewalls of the second frame interlock with each other;

[0007] The lamination precursor is laminated; the frame does not deform under lamination conditions.

[0008] In this embodiment of the invention, the frame includes a first frame and a second frame. Both the first and second frames include intersecting sidewalls and horizontal walls. In the pre-lamination body, the sidewalls of the first frame are opposite to the sidewalls of the front cover plate, and the horizontal walls of the first frame are opposite to the light-facing surface of the front cover plate. The sidewalls of the second frame are opposite to the sidewalls of the rear cover plate, and the horizontal walls of the second frame are opposite to the backlight surface of the rear cover plate. The sidewalls of the first and second frames interlock with each other, and the frame does not deform under lamination conditions. The above-mentioned structure and performance of the frame enable it to be used in a lamination environment. The frame is set in the pre-lamination body before lamination. In addition to the function of the frame in the prior art, the frame also replaces the function of the pressure frame in the prior art. This embodiment of the invention eliminates the need for placing and removing the pressure frame, reducing the number of processes, improving the production efficiency of the battery assembly, and reducing production costs by eliminating the need for the pressure frame in the entire production process. Meanwhile, compared with the frame in the prior art, the frame in the embodiment of the present invention usually has no displacement or very small displacement between it and the other objects in the laminating precursor, which helps to ensure the accuracy of the frame position and prevents the lead wires from being scratched and causing parallel connection, thereby producing a higher yield of battery components.

[0009] Optionally, the step of providing the lamination precursor includes:

[0010] The first frame is fixed to the front cover plate;

[0011] A front adhesive film, a battery cell, a rear adhesive film, and a rear cover are sequentially laid on the backlight side of the front cover.

[0012] The second frame is fixed on the backlight side of the rear cover plate, and the side walls of the first frame and the second frame interlock with each other to obtain the lamination precursor.

[0013] Optionally, the step of providing the lamination precursor includes:

[0014] A component precursor is provided; the component precursor includes a front cover plate, a front adhesive film, a battery cell, a rear adhesive film, and a rear cover plate stacked sequentially.

[0015] The first frame and the second frame are fixed to the component front body, and the side walls of the first frame and the side walls of the second frame interlock with each other to obtain the laminated front body.

[0016] Optionally, double-sided tape can be used to attach the first frame to the front cover plate;

[0017] And / or, using double-sided tape, attach the second frame to the rear cover plate.

[0018] According to a second aspect of the present invention, a frame is provided, comprising: a first frame and a second frame, wherein both the first frame and the second frame include intersecting sidewalls and horizontal walls;

[0019] The side walls of the first frame and the side walls of the second frame can interlock with each other; after the side walls of the first frame and the side walls of the second frame interlock with each other, the horizontal wall of the first frame and the horizontal wall of the second frame are distributed relative to each other;

[0020] The frame does not deform under lamination conditions.

[0021] Optionally, at least one of the side walls of the first frame and the second frame has at least one vent hole.

[0022] Optionally, the sidewalls of the first frame and the second frame have at least one pair of oppositely distributed vents in the interlocking position.

[0023] Optionally, after the sidewalls of the first frame and the sidewalls of the second frame interlock, each pair of relatively distributed vent holes are spliced ​​together to form a circular vent hole or an elliptical vent hole.

[0024] Optionally, the side walls of the first frame are enclosed to form a closed side wall, and / or the side walls of the second frame are enclosed to form a closed side wall.

[0025] Optionally, if the sidewall of the first frame has sharp edges, the vent is positioned to avoid the sharp edges;

[0026] And / or, if the sidewall of the second frame has an edge, the vent is positioned to avoid the edge.

[0027] Optionally, the height of both the first frame and the second frame is 3.65-4.25mm; the height of the first frame is the dimension of the first frame in the direction perpendicular to the horizontal wall of the first frame.

[0028] Optionally, the diameter of the vent hole is 1-2 mm.

[0029] Optionally, both the first frame and the second frame are at least one of galvanized steel frame, titanium alloy frame, and thermosetting plastic frame.

[0030] Optionally, the first frame and the second frame have the same structure.

[0031] Optionally, the thickness of the horizontal wall of the first frame, the horizontal wall of the second frame, the side wall of the first frame, and the side wall of the second frame are all 0.6-1.2 mm; the thickness of the horizontal wall of the first frame is the dimension of the horizontal wall of the first frame in the direction perpendicular to the horizontal wall of the first frame, and the thickness of the side wall of the first frame is the dimension of the side wall of the first frame in the direction perpendicular to the side wall of the first frame.

[0032] According to a third aspect of the present invention, a battery assembly is provided, the battery assembly including an assembly front body and any of the aforementioned frame edges; the assembly front body includes a front cover plate, a front adhesive film, a battery cell, a rear adhesive film, and a rear cover plate arranged in sequence.

[0033] The side walls of the first frame and the second frame are arranged around the front of the component, and the side walls of the first frame and the second frame interlock with each other. The horizontal wall of the first frame is distributed opposite to the light-facing surface of the front cover, and the horizontal wall of the second frame is distributed opposite to the backlight surface of the rear cover.

[0034] Optionally, the battery assembly is a double-glass battery assembly.

[0035] The aforementioned frame and battery assembly have the same or similar beneficial effects as the aforementioned battery assembly production method, and will not be repeated here to avoid repetition. Attached Figure Description

[0036] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 A flowchart illustrating the steps of a first method for producing a battery assembly according to an embodiment of the present invention is shown.

[0038] Figure 2 A schematic diagram of the structure of a border in an embodiment of the present invention is shown;

[0039] Figure 3 A schematic diagram of the structure of a first frame or a second frame according to an embodiment of the present invention is shown;

[0040] Figure 4 A partial structural schematic diagram of a lamination precursor according to an embodiment of the present invention is shown;

[0041] Figure 5 A partial structural schematic diagram of another lamination precursor in an embodiment of the present invention is shown.

[0042] Explanation of the attached drawing numbers:

[0043] 11-First frame, 12-Second frame, 111-Side wall of the first frame, 112-Horizontal wall of the first frame, 115-Ventilation hole, 121-Side wall of the second frame, 122-Horizontal wall of the second frame, 21-Front cover, 22-Front adhesive film, 23-Battery cell, 24-Rear adhesive film, 25-Rear cover, 13-Double-sided tape. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] Figure 1 A flowchart illustrating the steps of a first method for manufacturing a battery assembly according to an embodiment of the present invention is shown. (Refer to...) Figure 1 As shown, the method specifically includes the following steps:

[0046] Step S1, providing a lamination precursor; the lamination precursor includes: a frame, and a front cover plate, a front adhesive film, a battery cell, a rear adhesive film, and a rear cover plate stacked sequentially; the frame includes: a first frame and a second frame, both the first frame and the second frame including intersecting sidewalls and horizontal walls; in the lamination precursor: the sidewalls of the first frame are opposite to the sidewalls of the front cover plate, the horizontal walls of the first frame are opposite to the light-facing surface of the front cover plate, the sidewalls of the second frame are opposite to the sidewalls of the rear cover plate, the horizontal walls of the second frame are opposite to the backlight surface of the rear cover plate, and the sidewalls of the first frame and the second frame interlock with each other.

[0047] In this embodiment of the invention, the materials of the front cover, front adhesive film, rear adhesive film, and rear cover are not specifically limited. The battery cell is a unit in the battery assembly used for separating, transmitting, and collecting charge carriers. Optionally, in addition to the aforementioned frame, front cover, front adhesive film, battery cell, rear adhesive film, and rear cover, the battery assembly may also include solder strips, junction boxes, etc. This embodiment of the invention does not specifically limit these components.

[0048] Figure 2 A schematic diagram of a frame structure according to an embodiment of the present invention is shown. (Refer to...) Figure 2 As shown, the border may include a first frame 11 and a second frame 12. Figure 3 A structural schematic diagram of a first frame or a second frame according to an embodiment of the present invention is shown. (Refer to...) Figure 2 , Figure 3As shown, both the first frame 11 and the second frame 12 include intersecting sidewalls and horizontal walls. Specifically, the first frame 11 includes intersecting sidewalls 111 and horizontal walls 112, which can intersect perpendicularly. The second frame 12 also includes intersecting sidewalls 121 and horizontal walls 122, which can also intersect perpendicularly. The sidewalls 111 of the first frame 11 and 121 of the second frame 12 can interlock. After the sidewalls 111 of the first frame 11 and 121 of the second frame 12 interlock, the horizontal walls 112 of the first frame 11 and 122 of the second frame 12 are distributed opposite each other.

[0049] Figure 4 A partial structural schematic diagram of a lamination precursor according to an embodiment of the present invention is shown. Figure 5 A partial structural schematic diagram of another lamination precursor according to an embodiment of the present invention is shown. (Refer to...) Figure 4 , Figure 5 As shown, in the pre-laminated assembly: the sidewalls of the first frame 11 and the front cover 21 are distributed opposite each other, and the horizontal wall of the first frame 11 is distributed opposite to the light-facing surface of the front cover 21. The light-facing surface of the front cover 21 is the surface of the front cover 21 that receives light in the battery assembly. The sidewalls of the second frame 12 and the rear cover 25 are distributed opposite each other, and the horizontal wall of the second frame 12 is distributed opposite to the backlight surface of the rear cover 25. The sidewalls of the first frame 11 and the second frame 12 interlock with each other. The backlight surface of the rear cover 25 is the surface of the rear cover 25 that is away from light in the battery assembly. Alternatively, the backlight surface of the rear cover 25 is the surface of the rear cover 25 that is away from the back adhesive film 24 in the battery assembly.

[0050] Step S2: Laminate the lamination precursor; the frame does not deform under lamination conditions.

[0051] In this embodiment of the invention, the frame includes a first frame 11 and a second frame 12. Both the first frame 11 and the second frame 12 include intersecting sidewalls and horizontal walls. In the lamination precursor, the sidewall 111 of the first frame 11 is distributed opposite to the sidewall of the front cover plate 21, the horizontal wall 112 of the first frame 11 is distributed opposite to the light-facing surface of the front cover plate 21, the sidewall 121 of the second frame 12 is distributed opposite to the sidewall of the rear cover plate 25, and the horizontal wall 122 of the second frame 12 is distributed opposite to the backlight surface of the rear cover plate 25. The sidewalls 111 of the first frame 11 and the sidewalls 121 of the second frame 12 interlock with each other, and the frame does not deform under lamination conditions. The above-mentioned structure and performance of the frame allow it to be used in a lamination environment. The frame is set in the lamination precursor before lamination. The main function of the pressure frame in the prior art is to restrict the flow range of the front adhesive film 22 and the rear adhesive film 24 during the lamination process. In this embodiment of the invention, the frame, in addition to its function as a frame in the prior art, also replaces the role of the pressure frame in the prior art. During the lamination process, the frame can restrict the flow range of the front adhesive film 22 and the rear adhesive film 24. Therefore, this embodiment of the invention eliminates the need for placing and removing the pressure frame, reducing processes, improving the production efficiency of the battery assembly, and reducing production costs by eliminating the need for the pressure frame throughout the entire production process.

[0052] Meanwhile, the inventors discovered that in the prior art, the pressure frame needs to be removed after lamination. To facilitate this removal, during the placement of the pressure frame before lamination, there are gaps between the pressure frame and the side walls of the front cover plate, adhesive film, etc., which hinders accurate positioning of the pressure frame and consequently affects the restriction effect on the flow range of the front adhesive film 22 and the rear adhesive film 24 during lamination. Furthermore, due to the gaps between the pressure frame and the side walls of the front cover plate, adhesive film, etc., the pressure frame is prone to rubbing against the lead wires, leading to parallel connections, and may also cause lamination defects or even explosions. Compared to the pressure frame in the prior art, the frame in the embodiment of this invention typically has no or very little displacement between itself and the other components in the lamination precursor, which helps ensure the accuracy of the frame's position and prevents rubbing against the lead wires, thus resulting in a higher yield rate for the produced battery modules.

[0053] This invention does not specifically limit the pressure, temperature, etc., during the lamination process. The frame does not deform under lamination conditions, and the frame can effectively restrict the flow range of the front adhesive film 22 and the rear adhesive film 24 during the lamination process. At the same time, the frame does not affect the lamination process, and the frame can still be used normally after lamination.

[0054] Optionally, step S1 may include steps S11 to S13. Step S11: Fix the first frame to the front cover plate. Step S12: Sequentially lay a front adhesive film, a battery cell, a rear adhesive film, and a rear cover plate on the backlight side of the front cover plate. Step S13: Fix the second frame to the backlight side of the rear cover plate, with the sidewalls of the first frame and the second frame interlocking to form a laminated precursor.

[0055] Specifically, the lamination precursor is sequentially arranged from the light-facing side to the back-facing side of the battery module. The first frame 11 is fixed to the front cover plate 21, specifically, the first frame 11 is fixed to the light-facing side of the front cover plate 21. A front adhesive film 22, a battery cell 23, a rear adhesive film 24, and a rear cover plate 25 are sequentially laid on the back-facing side of the front cover plate 21. Then, a second frame 12 is fixed to the back-facing side of the rear cover plate 25, with the sidewalls 111 of the first frame 11 and 121 of the second frame 12 interlocking to obtain the lamination precursor. This embodiment of the invention expands the battery module manufacturing methods, making battery module manufacturing more diversified.

[0056] Optionally, step S1 may further include steps S14 to S15. Step S14: Provide a component precursor; the component precursor includes a front cover plate, a front adhesive film, a battery cell, a rear adhesive film, and a rear cover plate stacked sequentially. Step S15: Fix the first frame and the second frame onto the component precursor, with the sidewalls of the first frame and the sidewalls of the second frame interlocking to obtain a laminated precursor.

[0057] Specifically, the lamination precursor is formed by treating the module precursor as a whole and then fitting a first frame and a second frame around the module precursor. The module precursor includes a front cover plate 21, a front adhesive film 22, a battery cell 23, a rear adhesive film 24, and a rear cover plate 25 stacked sequentially. The first frame 11 and the second frame 12 are fixed to the module precursor, and the side walls 111 of the first frame 11 and the side walls 121 of the second frame 12 interlock with each other to form the lamination precursor.

[0058] Optionally, in the above-described step of providing the lamination precursor, the first frame can be fixed to the light-facing surface of the front cover plate and the second frame can be fixed to the back-facing surface of the rear cover plate by adhesive bonding. The specific adhesive bonding method is not limited. For example, liquid adhesive can be directly applied to the corresponding surfaces of the first frame, front cover plate, second frame, and rear cover plate, or liquid adhesive can be applied to the corresponding surfaces of the first frame, front cover plate, second frame, and rear cover plate using an adhesive applicator.

[0059] Optionally, double-sided tape can be used to attach the first frame to the front cover plate; and / or, double-sided tape can be used to attach the second frame to the rear cover plate. Compared to the existing technology that uses silicone to set the frame, the process time for bonding double-sided tape is shorter, requiring only a few minutes, and there is no need for silicone curing, saving process time and improving production efficiency by more than 50%. Furthermore, there is no need for overflow grooves in the frame, simplifying the frame structure and reducing the space occupied by the frame in the battery assembly. At the same time, there is no need to wipe off excess liquid adhesive, reducing process steps, alleviating the labor intensity of production personnel, and avoiding problems such as scratches from the frame while wiping adhesive or adhesive residue on clothing that is difficult to clean.

[0060] Specifically, you can first apply double-sided tape to the inside of the first frame near the front cover, flatten the tape using a roller, then attach the front cover to the tape and press it down with the roller to ensure a firm bond. Similarly, apply double-sided tape to the surface of the rear cover near the second frame, flatten it using a roller, then attach the second frame to the tape and press it down with the roller to ensure a firm bond.

[0061] For example, refer to Figure 4 , Figure 5 As shown, double-sided tape 13 is used to attach the first frame 11 to the light-facing surface of the front cover 21, and double-sided tape 13 is used to attach the second frame 12 to the backlight-facing surface of the rear cover 25.

[0062] In this embodiment of the invention, the double-sided tape exhibits good adhesive properties and a certain degree of elasticity, and does not deform under lamination conditions. This embodiment of the invention does not specifically limit the type of double-sided tape. For example, the double-sided tape may have the following characteristics: it provides a good connection and seal with the first frame, front cover plate, second frame, and rear cover plate. For instance, if the first and second frames are galvanized steel frames, and the front and rear cover plates are glass covers, then the double-sided tape has good adhesion to both the galvanized steel and the glass, providing a good connection and seal. The first frame, front cover plate, second frame, and rear cover plate are permanently bonded, making it simple and quick to use, with high strength and long-term durability, suitable for both indoor and outdoor applications. The double-sided tape can be a pressure-sensitive adhesive system, providing immediate bonding strength. The thickness can be relatively thin, and the almost concealed fastening method keeps the bonding surface smooth. The color of the double-sided tape is not specifically limited.

[0063] For example, the double-sided tape can be white and 0.025-0.062 inches (0.60-1.60 mm) thick, the thickness being the dimension of the double-sided tape in the overlapping direction of the front cover and the front adhesive film. The double-sided tape can use a modified acrylic adhesive with an easy-to-apply foam core, easily achieving bonding of low surface energy materials without a primer. Compared to existing technologies, the use of double-sided tape to fix the first frame and the front cover, and to fix the second frame and the rear cover in this embodiment of the invention, can replace many mechanical fastening methods, such as rivets, welding, screws, or liquid adhesives, minimizing drilling, grinding, repair, riveting, welding, and cleaning. Simultaneously, it can improve production efficiency, reduce production costs, achieve refined processing, and enable low-temperature operation, achieving good initial tack on frost-free surfaces down to 0°C.

[0064] The above-mentioned battery module production method may also include steps such as connecting battery cells in series to form a battery string, arranging the battery strings, and welding busbars, but the embodiments of the present invention do not specifically limit these steps.

[0065] This invention also provides a frame that can refer to the frame-related description in the aforementioned battery assembly production method and has the same or similar beneficial effects as the aforementioned battery assembly production method.

[0066] Specifically, refer to Figure 2 , Figure 3 As shown, the frame includes a first frame 11 and a second frame 12. Both the first frame 11 and the second frame 12 include intersecting sidewalls and horizontal walls. The first frame 11 includes intersecting sidewalls 111 and horizontal walls 112, which can intersect perpendicularly. The second frame 12 also includes intersecting sidewalls 121 and horizontal walls 122, which can also intersect perpendicularly. The sidewalls 111 of the first frame 11 and 121 of the second frame 12 can interlock. After the sidewalls 111 of the first frame 11 and 121 of the second frame 12 interlock, the horizontal walls 112 of the first frame 11 and 122 of the second frame 12 are distributed opposite each other. The frame does not deform under lamination conditions.

[0067] Optionally, both the first and second frames can be at least one of galvanized steel frames, titanium alloy frames, and thermosetting plastic frames. On the one hand, the first and second frames made of these materials will not deform under lamination conditions and have lower costs; on the other hand, the first and second frames made of these materials have good weather resistance and durability, making them suitable for both indoor and outdoor use. For example, both the first and second frames can be galvanized steel frames of grade Q215A, Q215B, or Q235A.

[0068] Optional, refer to Figure 2 , Figure 3 , Figure 5 As shown, at least one of the sidewalls 111 of the first frame 11 and 121 of the second frame 12 has at least one vent hole 115, which can discharge gas during the lamination process. The vent hole 115 can be located on either the sidewall 111 of the first frame 11, the sidewall 121 of the second frame 12, or both. The number of vent holes 115 in the frame is not specifically limited.

[0069] The shape of the vent 115 is not specifically limited. For example, refer to... Figure 2 , Figure 3 , Figure 5 As shown, the vent 115 is semi-circular in shape. Alternatively, the vent 115 can also be circular or elliptical. Circular vents, elliptical vents, or vents that can be joined together after engagement to form a circular or elliptical vent, all result in less turbulence and smoother exhaust during the exhaust process.

[0070] Optionally, the diameter of the vent hole is 1-2 mm. Within this size range, the vent hole facilitates smooth airflow without affecting the mechanical properties of the first and second frames. For example, if the vent hole on the first frame is semi-circular, its diameter is 1-2 mm. As another example, if the vent hole is circular, its diameter is 1-2 mm.

[0071] Optional, refer to Figure 2 , Figure 5 As shown, the sidewall 111 of the first frame 11 and the sidewall 121 of the second frame 12 have at least a pair of vents that are distributed opposite each other at the interlocking position. Normally, the interlocking position of the first frame 11 and the second frame 12 is basically the centerline of the battery assembly in the height direction. Most of the gas in the lamination process will be discharged from the centerline position of the battery assembly in the height direction. The sidewall 111 of the first frame 11 and the sidewall 121 of the second frame 12 have at least a pair of vents that are distributed opposite each other at the interlocking position, so that the path of gas movement in the battery assembly is shorter and it is easier to discharge gas.

[0072] Optional, refer to Figure 2 , Figure 5As shown, the sidewall 111 of the first frame 11 and the sidewall 121 of the second frame 12 have at least one pair of relatively distributed vent holes in the interlocking position. After the sidewall 111 of the first frame 11 and the sidewall 121 of the second frame 12 interlock, each pair of relatively distributed vent holes is spliced ​​into a circular vent hole or an elliptical vent hole. The splicing of two relatively distributed vent holes into a circular vent hole or an elliptical vent hole results in less turbulence and smoother exhaust during the exhaust process.

[0073] Optional, refer to Figure 2 , Figure 3 As shown, the sidewalls 111 of the first frame 11 enclose a closed sidewall, and / or the sidewalls 121 of the second frame 12 enclose a closed sidewall. Compared with the prior art where the frame is divided into four sides (front, back, left, and right), in this embodiment of the invention, the first frame 11 and the second frame 12 can be pressed together vertically during the frame installation process, which is convenient for installation and accurate positioning, and further improves the production quality of the battery assembly.

[0074] Optional, refer to Figure 2 , Figure 3 As shown, when the side wall 111 of the first frame 11 has an edge, the vent 115 is positioned to avoid the edge; and / or, when the side wall 121 of the second frame 12 has an edge, the vent 115 is positioned to avoid the edge. The vent 115 does not affect the mechanical properties of the frame and facilitates smooth exhaust. For example, the distance between the vent 115 and the edge can be between 80-100 mm.

[0075] Optional, refer to Figure 2 , Figure 3 As shown, the height h1 of the first frame 11 is 3.65-4.25 mm, and the height of the first frame 11 is the dimension of the first frame 11 in the direction perpendicular to the horizontal wall 112 of the first frame 11. The height h2 of the second frame 12 is 3.65-4.25 mm, and the height of the second frame 12 is the dimension of the second frame 12 in the direction perpendicular to the horizontal wall 122 of the second frame 12. The first frame 11 and the second frame 12 are within the above-mentioned height range, which is conducive to lamination.

[0076] Optionally, the first frame and the second frame have the same structure. In the process of producing the first frame and the second frame, only one set of production equipment or mold is needed to process the first frame and the second frame at the same time, which saves production costs and improves production efficiency.

[0077] Optionally, the thickness of the horizontal wall 112 of the first frame 11, the horizontal wall 122 of the second frame 12, the side wall 111 of the first frame 11, and the side wall 121 of the second frame 12 are all 0.6-1.2mm. Figure 3In this design, the thickness d of the sidewall 121 of the second frame 12 is 0.6-1.2 mm. The thickness of the horizontal wall 112 of the first frame 11 is the dimension of the horizontal wall 112 of the first frame 11 in the direction perpendicular to the horizontal wall 112 of the first frame 11, and the thickness of the sidewall 111 of the first frame 11 is the dimension of the sidewall 111 of the first frame 11 in the direction perpendicular to the sidewall 111 of the first frame 11. The thickness of the horizontal wall 122 of the second frame 12 is the dimension of the horizontal wall 122 of the second frame 12 in the direction perpendicular to the horizontal wall 122 of the second frame 12, and the thickness of the sidewall 121 of the second frame 12 is the dimension of the sidewall 121 of the second frame 12 in the direction perpendicular to the sidewall 121 of the second frame 12. The thickness of the horizontal wall 112 of the first frame 11, the thickness of the horizontal wall 122 of the second frame 12, the thickness of the side wall 111 of the first frame 11, and the thickness of the side wall 121 of the second frame 12 are within the above-mentioned size range, which not only ensures that the frame has good mechanical properties and is conducive to lamination, but also avoids waste.

[0078] This invention also provides a battery assembly, which includes a front body and any of the aforementioned frame components. The front body includes a front cover, a front adhesive film, a battery cell, a rear adhesive film, and a rear cover, all stacked sequentially. In the battery assembly, the sidewalls of the first frame and the second frame are disposed around the front body, and the sidewalls of the first and second frames interlock with each other. The horizontal wall of the first frame is distributed opposite to the light-facing surface of the front cover, and the horizontal wall of the second frame is distributed opposite to the backlight surface of the rear cover. This battery assembly can also be produced by any of the aforementioned battery assembly manufacturing methods. This battery assembly has the same or similar beneficial effects as the aforementioned battery manufacturing methods and frame components; to avoid repetition, these will not be described further here.

[0079] Optionally, the battery module can be a double-glass battery module. Specifically, in a double-glass battery module, the flowability of the pre-coating film and the post-coating film is usually stronger, and it is more necessary to restrict the flowability of the pre-coating film and the post-coating film during the lamination process.

[0080] It should be noted that the battery assembly production method, frame, and battery assembly provided in the embodiments of the present invention can be referenced to each other, and the three can achieve the same or similar beneficial effects.

[0081] The installation method of the battery module in the power station provided in this embodiment of the invention is the same as or similar to the installation method of the battery module in the power station provided in the prior art, and both can be installed by bolts or clamps. When using bolt installation, M6 or M8 bolts can be selected. The torque range for tightening M6 bolts is 8 N·m-12 N·m. The torque range for tightening M8 bolts is 14 N·m-18 N·m. When using clamp installation, the length of the clamp block is ≥40mm. The bolt installation method for the double-glass battery module can be external four-hole bolt installation (crossbeam parallel to the long frame, crossbeam perpendicular to the long frame), internal four-hole bolt installation, or 400-hole bolt installation.

[0082] It should be noted that, for the sake of simplicity, the method embodiments are all described as a series of actions. However, those skilled in the art should understand that the embodiments of the present invention are not limited to the described order of actions, because according to the embodiments of the present invention, some steps can be performed in other orders or simultaneously. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are all preferred embodiments, and the actions involved are not necessarily essential to the embodiments of the present invention.

[0083] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A method for producing a battery module, characterized in that, Includes the following steps: A lamination precursor is provided; the lamination precursor includes: a frame, and a front cover plate, a front adhesive film, a battery cell, a rear adhesive film, and a rear cover plate stacked sequentially; the frame includes: a first frame and a second frame, both the first frame and the second frame including intersecting sidewalls and horizontal walls; at least one sidewall of the first frame and the second frame has at least one vent hole; in the lamination precursor: the sidewall of the first frame is opposite to the sidewall of the front cover plate, the horizontal wall of the first frame is opposite to the light-facing surface of the front cover plate, the sidewall of the second frame is opposite to the sidewall of the rear cover plate, the horizontal wall of the second frame is opposite to the backlight surface of the rear cover plate, and the sidewalls of the first frame and the second frame interlock with each other; The lamination precursor is laminated; the frame does not deform under lamination conditions; During the lamination process, the gas produced during the lamination process is discharged through at least one vent on the side wall of the first frame and / or the second frame, the vent being located at the interlocking position of the side wall of the first frame and the side wall of the second frame.

2. The method for producing a battery module according to claim 1, characterized in that, The step of providing the lamination precursor includes: The first frame is fixed to the front cover plate; A front adhesive film, a battery cell, a rear adhesive film, and a rear cover are sequentially laid on the backlight side of the front cover. The second frame is fixed on the backlight side of the rear cover plate, and the side walls of the first frame and the second frame interlock with each other to obtain the lamination precursor.

3. The method for producing a battery module according to claim 1, characterized in that, The step of providing the lamination precursor includes: A component precursor is provided; the component precursor includes a front cover plate, a front adhesive film, a battery cell, a rear adhesive film, and a rear cover plate stacked sequentially. The first frame and the second frame are fixed to the component front body, and the side walls of the first frame and the side walls of the second frame interlock with each other to obtain the laminated front body.

4. The method for producing a battery assembly according to claim 2 or 3, characterized in that, The first frame is attached to the front cover plate using double-sided tape; And / or, using double-sided tape, attach the second frame to the rear cover plate.

5. A frame, characterized in that, The frame includes: a first frame and a second frame, both of which include intersecting sidewalls and horizontal walls; The side walls of the first frame and the side walls of the second frame can interlock with each other; after the side walls of the first frame and the side walls of the second frame interlock with each other, the horizontal wall of the first frame and the horizontal wall of the second frame are distributed relative to each other; The frame does not deform under lamination conditions; At least one of the side walls of the first frame and the second frame has at least one vent hole located at the interlocking position of the side walls of the first frame and the second frame.

6. The frame according to claim 5, characterized in that, It has at least one pair of vents that are oppositely distributed.

7. The frame according to claim 6, characterized in that, After the sidewalls of the first frame and the second frame interlock, each pair of relatively distributed vent holes are spliced ​​together to form a circular vent hole or an elliptical vent hole.

8. The frame according to claim 5, characterized in that, The side walls of the first frame form a closed side wall, and / or the side walls of the second frame form a closed side wall.

9. The frame according to any one of claims 5-7, characterized in that, When the side wall of the first frame has sharp edges, the vent is positioned to avoid the sharp edges; And / or, if the sidewall of the second frame has an edge, the vent is positioned to avoid the edge.

10. The frame according to any one of claims 5-8, characterized in that, The height of both the first frame and the second frame is 3.65-4.25mm; the height of the first frame is the dimension of the first frame in the direction perpendicular to the horizontal wall of the first frame.

11. The frame according to any one of claims 5-7, characterized in that, The diameter of the vent is 1-2 mm.

12. The frame according to any one of claims 5-8, characterized in that, Both the first frame and the second frame are at least one of galvanized steel frame, titanium alloy frame, and thermosetting plastic frame.

13. The frame according to any one of claims 5-8, characterized in that, The first frame and the second frame have the same structure.

14. The frame according to any one of claims 5-8, characterized in that, The thickness of the horizontal wall of the first frame, the horizontal wall of the second frame, the side wall of the first frame, and the side wall of the second frame are all 0.6-1.2mm; the thickness of the horizontal wall of the first frame is the dimension of the horizontal wall of the first frame in the direction perpendicular to the horizontal wall of the first frame, and the thickness of the side wall of the first frame is the dimension of the side wall of the first frame in the direction perpendicular to the side wall of the first frame.

15. A battery assembly, characterized in that, The battery assembly includes a front body and a frame as described in any one of claims 5-14; the front body includes a front cover plate, a front adhesive film, a battery cell, a rear adhesive film, and a rear cover plate stacked sequentially. The side walls of the first frame and the second frame are disposed around the front of the component, and the side walls of the first frame and the second frame interlock with each other. The horizontal wall of the first frame is distributed opposite to the light-facing surface of the front cover, and the horizontal wall of the second frame is distributed opposite to the backlight surface of the rear cover. At least one side wall of the first frame and the second frame has at least one vent hole, which is located at the interlocking position of the side walls of the first frame and the second frame.

16. The battery assembly according to claim 15, characterized in that, The battery module is a double-glass battery module.

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