Assembly equipment and battery device production line

Abstract

The embodiment of the utility model provides assembly equipment and a production line of a battery device. The assembly equipment is used for assembling an end cover of a single battery to a shell and comprises a carrier, a correction mechanism, a flaring mechanism and a press fitting mechanism. The carrier is used for bearing the shell, the correcting mechanism is used for correcting the position of the shell, the flaring mechanism is used for enabling the shell to expand along an opening in the first direction, the first direction is perpendicular to the large face of the battery single body, the large face is the face with the largest area in all the surfaces of the battery single body, and the press fitting mechanism is used for assembling the end cover to the shell through the opening. According to the assembly equipment and the production line of the battery device, the assembly qualification rate of the battery monomers can be improved.

Description

Technical Field

[0001] Embodiments of the present application relate to the field of battery technology, and more particularly to an assembly equipment and a production line for battery devices. Background Art

[0002] The outer shell of a battery cell includes a shell and an end cap, and the end cap is welded to the shell. Taking the end cap with a step structure as an example, in the actual assembly process, the step structure of the end cap needs to be installed into the shell, and then welded. The assembly qualification rate directly affects the welding quality. The assembly qualification rate of the assembly equipment provided in the related art is low. Utility Model Content

[0003] In view of this, the embodiments of the present application are intended to provide an assembly device and a production line of battery devices with a high assembly qualification rate.

[0004] A first aspect of an embodiment of the present application provides an assembly device for assembling an end cover of a battery cell to a shell, the assembly device comprising: a carrier for carrying the shell and the end cover; a correction mechanism for correcting the relative positions of the shell and the end cover; an expansion mechanism for expanding the opening of the shell along a first direction, wherein the first direction is perpendicular to a large surface of the shell, the large surface being the surface with the largest area among all surfaces of the shell; and a press-fitting mechanism for assembling the end cover to the shell via the opening.

[0005] The assembly equipment of the embodiment of the present application is provided with an expansion mechanism to expand the opening of the shell in a direction perpendicular to the large surface of the shell, that is, to move the two long sides of the shell outward, thereby effectively expanding the area of ​​the opening, reducing the difficulty of aligning the end cap with the shell, improving the smoothness of the end cap when it is installed into the shell, and ultimately improving the assembly quality. In particular, when the shell is thin (for example, the shell thickness is 0.2mm) and / or the size of the step structure of the end cap is small (for example, the size of the step structure along the distribution direction of the end cap and the shell is 0.35mm), the assembly success rate and qualified rate can be significantly improved.

[0006] In some embodiments, the carrier includes a positioning member and a limiting member arranged on one side of the positioning member, the positioning member is used to fix the end cover, the limiting member and the positioning member are arranged to form an activity space for the shell to move, and the limiting member is used to constrain the shell within the activity space.

[0007] In the related art, the pressing mechanism on the top side of the shell drives the end cover to move toward the shell to achieve assembly. In the actual assembly process, both the shell and the end cover need to move, which results in low assembly efficiency, and the errors when the two move will accumulate, resulting in a decrease in the qualified assembly rate. In this embodiment, the end cover is fixed by a positioning member, and the shell can move in the movable space on one side of the end cover, so that only the shell needs to be moved for press-fitting, without moving the end cover, thereby improving assembly efficiency and qualified assembly rate.

[0008] In some embodiments, the limiting member includes two limiting columns and at least two limiting arms, the limiting columns are arranged on the top side of the positioning member and extend along the height direction, the two limiting columns are distributed along the second direction, and the first direction, the second direction and the height direction are perpendicular to each other; at least one limiting arm is arranged on the side of each limiting column facing the other limiting column, and each limiting arm includes two limiting plates arranged at intervals in the first direction.

[0009] In this embodiment, the limiting column and the limiting arm are used to limit the position of the shell in the first direction and the second direction, so that the structure of the limiting member can be simplified. On the other hand, in this embodiment, the limiting of the shell in the first direction is achieved by the limiting arm, which makes the large surface of the shell basically completely exposed to the limiting member, making it easier for the correction mechanism and the expansion mechanism to apply force to the large surface of the shell to achieve position correction of the shell and expansion of the opening.

[0010] In some embodiments, the carrier further includes a fixing member and a locking member, wherein the fixing member is movably connected to the limiting column, and the locking member can operably lock the fixing member in a position against the shell to maintain the relative position of the shell and the end cover.

[0011] In the related art, after the end cap is assembled to the shell, the relative position of the shell and the end cap is usually maintained by means of tape, and then the two are transferred to a welding station for welding. During the welding process, the tape needs to be torn off. The process of applying and tearing off the tape reduces production efficiency, and the residual glue marks after the tape is torn off may affect the quality of subsequent welding. In this embodiment, after the assembly is completed, the relative position of the shell and the end cap can be maintained by the fixing parts of the carrier, so that the carrier and the shell and the end cap carried by the carrier can be directly transferred to the subsequent station for welding, thereby improving production efficiency and welding effect.

[0012] In some embodiments, the expansion mechanism includes two connecting modules, which are respectively arranged on opposite sides of the carrier along the first direction, each of the connecting modules includes at least one suction nozzle and a vacuum generator connected to the suction nozzle, and the vacuum generator is used to generate negative pressure in the suction nozzle so that the suction nozzle can be adsorbed on the large surface.

[0013] In this embodiment, the opening expansion is achieved by the cooperation of the suction nozzle and the vacuum generator, which helps to simplify the structure of the expansion mechanism and improve its operation efficiency. In addition, the force provided by the suction nozzle is relatively small, which can reduce the probability of plastic deformation of the shell during the expansion process and the deformation amount when plastic deformation occurs.

[0014] In some embodiments, the pressing mechanism includes: a pressing head and a driving member connected to the pressing head, the driving member is used to drive the pressing head to move toward the shell, and a surface of one side of the pressing head facing the carrier is recessed to form a positioning groove, and the positioning groove can accommodate the shell and form a clearance fit with the shell.

[0015] It can be understood that in the actual assembly process, the press-fitting mechanism will not be activated until the flaring mechanism expands the opening, and the forces applied to the two large surfaces of the shell when the flaring mechanism expands the opening may not be exactly the same, causing the shell to tilt in the first direction. In this embodiment, a positioning groove that can fit with the shell clearance is provided on the side of the pressure head facing the shell, so that during the press-fitting process, the direction of the shell can be corrected to a certain extent, thereby further improving the assembly success rate and qualified rate.

[0016] In some embodiments, the correction mechanism includes two correction modules, which are respectively arranged on opposite sides of the carrier along the first direction, each of the correction modules includes a base, and a first correction block and a second correction block arranged on the base, the first correction block can move relative to the base along the first direction, and the second correction block can move relative to the base along the second direction, and the first direction, the second direction and the height direction are perpendicular to each other.

[0017] In this embodiment, the first correction blocks of the two correction modules can move toward each other and abut against the opposite side surfaces (large surfaces) of the shell along the first direction, thereby realizing the position adjustment of the shell along the first direction, and the second correction blocks of the two correction modules can move toward each other and abut against the opposite side surfaces of the shell along the second direction, thereby realizing the position adjustment of the shell along the second direction. This correction method has high precision and is easy to control.

[0018] On the other hand, in this embodiment, since the correction blocks on both sides can simultaneously apply forces to the shell, the correction blocks can correct the position of the shell and also perform certain shaping on the shell, thereby further improving the assembly qualification rate. For example, assuming that the opening of the shell fails to fully recover after the end cover is assembled to the shell, but is still in an expanded state, the two first correction blocks can be driven to move toward each other and apply forces toward each other to the large surface of the shell to recover the opening.

[0019] In some embodiments, the second calibration block is disposed on a side of the first calibration block away from the base and is slidably matched with the first calibration block along the second direction. In the direction pointing to the carrier, the second calibration block exceeds the end surface of the first calibration block.

[0020] In this embodiment, the second correction block is slidably matched with the first correction block. In this way, in actual use, when the first correction block moves relative to the base, it can drive the second correction block to move relative to the base, thereby improving the operation efficiency of the correction mechanism and further improving the assembly efficiency.

[0021] In some embodiments, each of the correction modules includes two second correction blocks, which are respectively disposed on opposite sides of the first correction block along the second direction.

[0022] In this embodiment, two second correction blocks are provided on each correction module, that is to say, each correction module can independently realize the position adjustment of the shell in the second direction. In this way, the position adjustment of the shell along the second direction can be completed even when the position of the shell along the first direction is not adjusted into place (in this case, it is possible that only the second correction block of one of the correction modules can come into contact with the shell).

[0023] In some embodiments, the expansion mechanism is disposed on the first correction block.

[0024] In this embodiment, the expanding mechanism is arranged on the first correction block, so that the first correction block can drive the expanding mechanism to move along the first direction toward the carrier, without setting up an independent power mechanism to drive the expanding mechanism to move relative to the carrier, thereby simplifying the overall structure of the assembly equipment, improving the operation efficiency of the expanding mechanism, and thereby improving the assembly efficiency.

[0025] In some embodiments, the assembly equipment further includes a transport mechanism for transporting the carrier.

[0026] In this embodiment, a transfer mechanism is provided to transfer the carrier, so that streamlined operations can be achieved in the production process, and the assembly equipment does not need to perform pre-assembly, welding and other processes, thereby improving the efficiency of batch assembly.

[0027] A second aspect of the embodiments of the present application provides a production line for a battery device, wherein the production line for the battery device comprises the assembly equipment according to the first aspect of the embodiments of the present application.

[0028] The production line of the battery device of the embodiment of the present application has all the advantages of the assembly equipment described in any of the above embodiments, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1This is a schematic diagram of the structure of the assembly equipment of an embodiment of the present application;

[0030] Figure 2 A schematic diagram of the cooperation between the carrier and the housing and end cover of the battery cell according to an embodiment of the present application;

[0031] Figure 3 A schematic diagram of the structure of a carrier according to an embodiment of the present application;

[0032] Figure 4 A schematic diagram of the structure of the connection module of an embodiment of the present application;

[0033] Figure 5 This is a schematic diagram of the structure of the pressure head of an embodiment of the present application;

[0034] Figure 6 This is a schematic diagram of the structure of the correction module of an embodiment of the present application;

[0035] Figure 7 This is a schematic diagram of the coordination between the correction module and the connection module according to an embodiment of the present application.

[0036] Description of Reference Numerals

[0037] 1. Carrier; 11. Positioning member; 12. Limiting member; 121. Limiting column; 122. Limiting arm; 1221. Limiting plate; 13. Fixing member; 14. Locking member; 2. Correction mechanism; 21. Correction module; 211. Base; 212. First correction block; 2121. Main body; 2122. Raised portion; 213. Second correction block; 214. First power member; 215. Second power member; 3. Expanding mechanism; 31. Connecting module; 311. Suction nozzle; 312. Vacuum generator; 4. Pressing mechanism; 41. Press head; 41a. Positioning groove; 42. Driving member; 5. Bracket; X. Shell; Y. End cover. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0039] The various specific technical features described in the specific embodiments can be combined in any suitable manner without contradiction, for example, different embodiments and technical solutions can be formed by combining different specific technical features. In order to avoid unnecessary repetition, the various possible combinations of the specific technical features in the utility model will not be described separately.

[0040] In the following description, the terms "first\second\..." are only used to distinguish different objects, and do not mean that the objects have the same or related points. It should be understood that the directions "above", "below", "outside" and "inside" are all directions in normal use, and the directions "left" and "right" refer to the left and right directions shown in the specific corresponding schematic diagrams, which may be the left and right directions in normal use or not.

[0041] It should be noted that the terms "comprises", "includes" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element. "Multiple" means greater than or equal to two.

[0042] In the description of the present application, the orientations or positional relationships of “first direction”, “second direction” and “height direction” are based on the orientations or positional relationships shown in the accompanying drawings, wherein the “first direction” is the direction indicated by the arrow L1 in the accompanying drawings, the “second direction” is the direction indicated by the arrow L2 in the accompanying drawings, and the “height direction” is the direction indicated by the arrow L3 in the accompanying drawings. It should be understood that these orientation terms are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply 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.

[0043] In the description of the embodiments of the present application, the orientation or position relationship indicated by technical terms such as "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", and "circumferential" are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0044] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like 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 or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0045] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and may be direct contact or contact through an intermediate medium layer. It may be contact with essentially no interaction force between the two contacting parties, or it may be contact with interaction force between the two contacting parties.

[0046] An embodiment of the present application provides an assembly device for assembling an end cover of a battery cell to a housing.

[0047] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0048] The battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc., which is not limited in the embodiments of the present application.

[0049] The battery cell may include a shell, which may be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell), etc. The shell includes an end cover and a shell body, the shell body is provided with an opening, and the end cover is provided to cover the opening. The shell body may be provided with one or more openings. One or more end covers may also be provided.

[0050] In some embodiments, the end cap may have a step structure, and the step structure is located inside the shell. In some embodiments, the thickness of the shell may be less than or equal to 0.4 mm, such as 0.2 mm, 0.25 mm, 0.3 mm, 0.35 mm, 0.4 mm, etc., and the size of the step structure of the end cap along the distribution direction of the end cap and the shell may be less than or equal to 0.5 mm, such as 0.3 mm, 0.35 mm, 0.4 mm, 0.45 mm, 0.5 mm, etc. Reducing the thickness of the shell and the size of the step structure helps to increase the capacity of the battery cell.

[0051] In some other embodiments, the outer periphery of the end cap is connected to the inner periphery of the shell.

[0052] The assembly qualification rate of the assembly equipment provided in the related art is low, especially when the shell is thin (for example, the shell thickness is 0.2 mm) and / or the size of the step structure of the end cover is small (for example, the size of the step structure along the distribution direction of the end cover and the shell is 0.35 mm). In the assembly process, problems such as shell deformation, large gap between the shell and the end cover, and end cover offset may occur, resulting in the outward expansion of the step structure and the edge of the shell in the subsequent welding process, and ultimately leading to problems such as broken welds and pinholes.

[0053] In view of the above problems, the assembly equipment of the present application is proposed, which is used to assemble the end cover of the battery cell to the shell. The assembly equipment specifically includes a carrier, a correction mechanism, an expansion mechanism and a press-fitting mechanism. The carrier is used to carry the shell. The correction mechanism is used to correct the position of the shell. The expansion mechanism is used to expand the shell along the opening in a first direction. The first direction is perpendicular to the large surface of the battery cell. The large surface is the surface with the largest area among the surfaces of the battery cell. The press-fitting mechanism is used to assemble the end cover to the shell through the opening.

[0054] The assembly equipment of the embodiment of the present application is provided with an expansion mechanism to expand the opening of the shell in a direction perpendicular to the large surface of the shell, that is, to move the two long sides of the shell outward, thereby effectively expanding the area of ​​the opening, reducing the difficulty of aligning the end cap with the shell, improving the smoothness of the end cap when it is installed into the shell, and ultimately improving the assembly quality. In particular, when the shell is thin (for example, the shell thickness is 0.2mm) and / or the size of the step structure of the end cap is small (for example, the size of the step structure along the distribution direction of the end cap and the shell is 0.35mm), the assembly success rate and qualified rate can be significantly improved.

[0055] Reference Figure 1 The assembly device of the embodiment of the present application includes a carrier 1, a correction mechanism 2, an expansion mechanism 3 and a press-fit mechanism 4. The carrier 1 is used to carry the shell X and the end cover Y. The correction mechanism 2 is used to correct the relative position of the shell X and the end cover Y. The expansion mechanism 3 is used to expand the shell X along the opening in a first direction, and the first direction is perpendicular to the large surface of the battery cell, and the large surface is the surface with the largest area among the surfaces of the battery cell. The press-fit mechanism 4 is used to assemble the end cover Y to the shell X through the opening.

[0056] The specific structures of the carrier 1 and the correction mechanism 2 are not limited. As an example, the carrier 1 can be configured to allow at least one of the end cap Y and the shell X carried thereon to move relative to it within a certain range, and the correction mechanism 2 can push the shell X and / or the end cap Y to move relative to the carrier 1 to correct the relative position between the two. As another example, the carrier 1 may include a first part for fixing the shell X and a second part for fixing the end cap Y, the first part can move relative to the second part, and the correction mechanism 2 can push the first part and / or the second part to move to correct the relative position of the shell X and the end cap Y.

[0057] The expansion mechanism 3 is used to expand the opening of the shell X along a first direction, which is a direction perpendicular to the large surface of the shell X, that is, a direction perpendicular to the long side of the opening of the shell X. It can be understood that the expansion of the opening along the cover direction will effectively increase the area of ​​the opening, making it easier to install the end cover Y into the shell X.

[0058] It should be noted that the orientation of the large surface of the shell X may change during the actual assembly process, and the first direction here is determined based on the orientation of the large surface of the shell X after the shell X is assembled in a desired manner.

[0059] The specific structure of the expansion mechanism 3 is not limited, as long as it can achieve the above functions. As an example, the expansion mechanism 3 can apply forces away from each other along the first direction to the two large surfaces of the shell X, so that the opening expands along the first direction. The expansion mechanism 3 can be connected to the large surface from the outside of the shell X to apply the above force, or it can extend into the inside of the shell X and connect to the large surface to apply the above force.

[0060] The specific structure of the press-fitting mechanism 4 can refer to the relevant technology in the art. As an example, the press-fitting mechanism 4 can be arranged on one side of the distribution direction of the end cap Y and the shell X. When the correction mechanism 2 aligns the shell X with the end cap Y, and the expansion mechanism 3 expands the opening of the shell X along the first direction, the press-fitting structure can apply a force to the shell X and / or the end cap Y along the distribution direction of the end cap Y and the shell X, so that the two move toward each other, thereby realizing the assembly of the end cap Y to the shell X through the opening.

[0061] In the actual assembly process, the housing X and the end cap Y can be placed on the carrier 1 first, and then the correction mechanism 2 is controlled to correct the relative position between the two so that the two are aligned. Next, the expansion mechanism 3 is controlled to expand the opening along the first direction, and then the press-fitting mechanism 4 is controlled to assemble the end cap Y to the housing X through the expanded opening.

[0062] The assembly device of the embodiment of the present application is provided with an expansion mechanism 3 to expand the opening of the shell X in a direction perpendicular to the large surface of the shell X, that is, to move the two long sides of the shell X outward, thereby effectively expanding the area of ​​the opening, reducing the difficulty of aligning the end cover Y with the shell X, improving the smoothness of the end cover Y when it is installed into the shell X, and finally improving the assembly quality. In particular, when the shell X is thin (for example, the thickness of the shell X is 0.2 mm) and / or the size of the step structure of the end cover Y is small (for example, the size of the step structure along the distribution direction of the end cover Y and the shell X is 0.35 mm), the assembly success rate and qualified rate can be significantly improved.

[0063] In some embodiments, reference Figure 2 and Figure 3The carrier 1 includes a positioning member 11 and a limiting member 12 arranged on one side of the positioning member 11. The positioning member 11 is used to fix the end cover Y. The limiting member 12 and the positioning member 11 are surrounded to form an activity space for the shell X to move. The limiting member 12 is used to constrain the shell X in the activity space.

[0064] The specific structure of the positioning member 11 is not limited. As an example, the positioning member 11 may be provided with a matching structure for matching and connecting with the end cover Y, so that the positioning member 11 can position the end cover Y. In this embodiment, the positioning member 11 can be configured to fix the end cover Y after positioning, or can be configured to only limit the end cover Y without fixing it. Those skilled in the art can make specific determinations according to actual use requirements.

[0065] In some embodiments, the end cover Y is provided with structures such as poles and pressure relief structures, and the positioning member 11 may have an avoidance structure for avoiding the above structures. For example, the positioning member 11 may be partially hollowed out, partially thinned, etc. at a position corresponding to the above structure.

[0066] The specific structure of the limiting member 12 is not limited, as long as it can be surrounded by the positioning member 11 to form an activity space and constrain the housing X within the activity space. The specific shape and volume of the activity space determine the activity range of the housing X. These parameters can be specifically determined by those skilled in the art according to the action range of the correction mechanism 2, the expansion mechanism 3, the press-fitting mechanism 4 and other mechanisms, and are not limited in this embodiment.

[0067] Constraining the shell X in the activity space can be understood as that, in the absence of external force, the shell X cannot leave the activity space after being placed in the activity space.

[0068] In the related art, the end cover is driven by the pressing mechanism on the top side of the shell to move toward the shell to achieve assembly. In the actual assembly process, both the shell and the end cover need to be moved, the assembly efficiency is low, and the errors when the two move will accumulate, resulting in a decrease in the qualified assembly rate. In this embodiment, the end cover Y is fixed by the positioning member 11, and the shell X can move in the movable space on one side of the end cover Y, so that only the shell X needs to be moved to perform press-fitting, without moving the end cover Y, thereby improving the assembly efficiency and qualified assembly rate.

[0069] In some embodiments, reference Figure 3 The limiting member 12 includes two limiting columns 121 and at least two limiting arms 122. The limiting columns 121 are arranged on the top side of the positioning member 11 and extend along the height direction. The two limiting columns 121 are distributed along the second direction. The first direction, the second direction and the height direction are perpendicular to each other. At least one limiting arm 122 is arranged on one side of each limiting column 121 facing the other limiting column 121, and each limiting arm 122 includes two limiting plates 1221 arranged at intervals in the first direction.

[0070] The specific height to which the limiting column 121 extends is not limited. The distance between the top of the limiting column 121 and the positioning member 11 can be greater than or equal to the height of the shell X, or can be less than the height of the shell X.

[0071] The limiting column 121 can be connected to the positioning member 11 by welding, bonding, clamping, threaded connection, etc., or can be formed into an integrated structure with the positioning member 11, which is not limited.

[0072] The two limiting posts 121 are arranged at intervals along the second direction, so that the housing X can be constrained between the two along the second direction. In order to enable the housing X to enter the activity space and move in the activity space, the distance D1 between the two limiting posts 121 should be greater than the length D2 of the long side of the housing X. For example, the difference between the two (D1-D2) can be 1-6 cm. Those skilled in the art can specifically determine the difference according to actual use requirements.

[0073] It should be noted that the distance between the two limiting posts 121 herein refers to the minimum distance between the surfaces of the two limiting posts 121 facing each other.

[0074] The limiting arm 122 includes two limiting pieces 1221 spaced apart along the first direction, so that the housing X can be constrained between the two limiting pieces 1221 along the first direction. Similarly, in order to allow the housing X to enter the activity space and move in the activity space, and in order to allow the opening to expand along the first direction, the distance D3 between the two limiting pieces 1221 of the same limiting arm 122 should be greater than the length D4 of the short side of the housing X, for example, the difference between the two (D3-D4) can be 0.2-2 cm. Those skilled in the art can specifically determine the difference according to actual use requirements.

[0075] It should be noted that the distance between the two limiting plates 1221 herein refers to the distance between the surfaces of the two limiting plates 1221 facing each other.

[0076] Furthermore, along the second direction, the distance D5 that the end of the limiting piece 1221 extends beyond the limiting column 121 should be greater than the general difference between D1 and D2, that is, D5>(D1-D2) / 2, so that no matter where the shell X is in the activity space, the projection of each limiting piece 1221 along the second direction overlaps with the large surface of the shell X.

[0077] Only one limiting arm 122 may be provided on the side of each limiting column 121 facing the other limiting column 121, or multiple limiting arms 122 may be provided in the height direction. The number of limiting arms 122 on the two limiting columns 121 may be the same or different. The limiting arms 122 on the two limiting columns 121 may be aligned in the height direction or staggered in the height direction, and there is no limitation on this.

[0078] In this embodiment, the limiting column 121 and the limiting arm 122 are used to limit the housing X in the first direction and the second direction, so that the structure of the limiting member 12 can be simplified. On the other hand, in this embodiment, the limiting of the housing X in the first direction is achieved by the limiting arm 122, which makes the large surface of the housing X basically completely exposed to the limiting member 12, making it easier for the correction mechanism 2 and the expansion mechanism 3 to apply a force to the large surface of the housing X to achieve position correction of the housing X and expansion of the opening.

[0079] Those skilled in the art will appreciate that the structure of the limit member 12 is not limited thereto. For example, the limit member 12 may also be a cylindrical structure. In this case, a hollow portion may be formed on the limit member 12 so that the correction mechanism 2, the expansion mechanism 3, the pressing mechanism 4, etc. may contact the shell X.

[0080] In some embodiments, the carrier 1 further includes a fixing member 13 and a locking member 14 . The fixing member 13 is movably connected to the limiting column 121 . The locking member 14 can operably lock the fixing member 13 in a position against the shell X to maintain the relative position of the shell X and the end cover Y.

[0081] Maintaining the relative position of the housing X and the end cover Y here should be understood as preventing relative movement between the housing X and the end cover Y. In actual use, after assembly is completed, the locking member 14 and the fixing member 13 can be operated to maintain the relative position of the housing X and the end cover Y, and then the carrier 1 is moved to a subsequent station, such as a welding station, for processing.

[0082] The specific structures of the fixing member 13 and the locking member 14 are not limited. As an example, the fixing member 13 may be a block structure or a plate structure. The fixing member 13 may be connected to the top of the limiting column 121 and may rotate relative to the limiting column 121 around the axis of the first direction. The number of fixing members 13 may be two, which are respectively arranged at the tops of the two limiting columns 121. In this embodiment, the locking member 14 may be a mechanical locking structure arranged at the rotation connection between the fixing member 13 and the limiting column 121, which can limit the rotation of the fixing member 13 relative to the limiting column 121 to achieve locking. Alternatively, the locking member 14 may be a power structure such as an electric cylinder, which can provide power to keep the fixing member 13 in a position against the housing X to achieve locking.

[0083] Of course, the structures of the fixing member 13 and the locking member 14 are not limited thereto, as long as the two cooperate to maintain the relative positions of the housing X and the end cover Y.

[0084] In the related art, after the end cover Y is assembled to the shell X, the relative position of the shell X and the end cover Y is usually maintained by means of tape, etc., and then the two are transferred to a welding station for welding. During the welding process, the tape needs to be torn off. The process of applying and tearing off the tape reduces the production efficiency, and the residual glue marks after the tape is torn off may affect the quality of subsequent welding. In this embodiment, after the assembly is completed, the relative position of the shell X and the end cover Y can be maintained by the fixing member 13 of the carrier 1, so that the carrier 1 and the shell X and the end cover Y carried by the carrier 1 can be directly transported to the subsequent station for welding, thereby improving the production efficiency and welding effect.

[0085] In some embodiments, reference Figure 1 and Figure 4 The expansion mechanism 3 includes two connection modules 31, which are respectively arranged on opposite sides of the carrier 1 along the first direction. Each connection module 31 includes at least one suction nozzle 311 and a vacuum generator 312 connected to the suction nozzle 311. The vacuum generator 312 is used to generate negative pressure in the suction nozzle 311 so that the suction nozzle 311 can be adsorbed on the large surface.

[0086] The specific structure of the suction nozzle 311 is not limited, as long as it can be adsorbed on the large surface of the shell X. Each connection module 31 may include only one suction nozzle 311, or may include multiple suction nozzles 311. Those skilled in the art may specifically determine the number of suction nozzles 311 based on the force required for the opening to expand and the suction force that the suction nozzle 311 can provide. In the case where the connection module 31 includes multiple suction nozzles 311, at least a portion of the multiple suction nozzles 311 may be distributed along the second direction, or at least a portion of the multiple suction nozzles 311 may be distributed along the height direction. The connection module 31 including multiple suction nozzles 311 helps to disperse the force on the large surface of the shell X and reduce the possibility of local deformation of the large surface of the shell X during the expansion process.

[0087] The specific structure of the vacuum generator 312 can refer to the relevant technology in the field, and will not be repeated here.

[0088] The connection module 31 can be configured to move relative to the carrier 1 along the first direction, so that after the suction nozzle 311 is adsorbed onto the large surface, the connection module 31 can be controlled to move away from the carrier 1 along the first direction to pull the two large surfaces apart, so that the opening expands. Alternatively, the connection module 31 can also be set to be fixed, and the suction force of the suction nozzle 311 is used to pull the two large surfaces apart.

[0089] It can be understood that the suction force provided by the suction nozzle 311 may affect the movement of the housing X toward the end cap Y. Therefore, in the embodiment where the press-fitting mechanism 4 pushes the housing X toward the end cap Y to complete the assembly, after the press-fitting mechanism 4 abuts against the housing X, the vacuum generator 312 can be turned off to break the vacuum, thereby completing the assembly. Alternatively, the press-fitting mechanism 4 can also apply a force to move the housing X relative to the suction nozzle 311, thereby breaking the vacuum inside the suction nozzle 311.

[0090] In this embodiment, the opening expansion is achieved by the cooperation of the suction nozzle 311 and the vacuum generator 312, which helps to simplify the structure of the expansion mechanism 3 and improve its operation efficiency. In addition, the force provided by the suction nozzle 311 is relatively small, which can reduce the probability of plastic deformation of the shell X during the expansion process and the deformation amount when plastic deformation occurs.

[0091] Of course, the structure of the expansion mechanism 3 is not limited thereto. For example, the expansion mechanism 3 can also be configured to be able to extend into the shell X (for example, extend into the shell X through an opening) and apply forces away from each other to the two large surfaces of the shell X to expand the opening.

[0092] In some embodiments, reference Figure 1 and Figure 4 The pressing mechanism 4 includes a pressing head 41 and a driving member 42 connected to the pressing head 41. The driving member 42 is used to drive the pressing head 41 to move toward the shell X. The surface of the pressing head 41 on one side facing the carrier 1 is recessed to form a positioning groove 41a. The positioning groove 41a can accommodate the shell X and form a clearance fit with the shell X.

[0093] Taking the carrier 1 including the positioning member 11 and the limiting member 12 arranged on the top side of the positioning member 11 as an example, the assembly equipment may include a bracket 5, the carrier 1 is arranged on the bottom side of the bracket 5, and the pressing mechanism 4 is installed on the bracket 5.

[0094] The specific structures of the pressure head 41 and the driving member 42 are not limited. As an example, the pressure head 41 can be a plate-like structure, and the driving member 42 can be a cylinder, an oil cylinder, a motor, etc. The output end of the driving member 42 can be directly connected to the pressure head 41, and can also be connected to the pressure head 41 through a switching mechanism, and there is no limitation to this.

[0095] The positioning groove 41a here can accommodate the shell X and form a clearance fit with the shell X. It should be understood that a part of the shell X can enter the positioning groove 41a, and there is a gap between the outer periphery of the part of the shell X entering the positioning groove 41a and the inner periphery of the positioning groove 41a, and it is not completely fitted.

[0096] It can be understood that in the actual assembly process, the press-fitting mechanism 4 is activated only after the flaring mechanism 3 expands the opening, and the forces applied to the large surfaces on both sides of the shell X by the flaring mechanism 3 when expanding the opening may not be completely the same, resulting in the shell X being tilted in the first direction. In this embodiment, a positioning groove 41a capable of gap-matching with the shell X is provided on the side of the pressing head 41 facing the shell X, so that during the press-fitting process, the orientation of the shell X can be corrected to a certain extent, thereby further improving the assembly success rate and qualified rate.

[0097] In some embodiments, reference Figure 1 and Figure 6 The correction mechanism 2 includes two correction modules 21, which are respectively arranged on opposite sides of the carrier 1 along the first direction. Each correction module 21 includes a base 211, and a first correction block 212 and a second correction block 213 arranged on the base 211. The first correction block 212 can move relative to the base 211 along the first direction, and the second correction block 213 can move relative to the base 211 along the second direction. The first direction, the second direction and the height direction are perpendicular to each other.

[0098] The specific structures of the base 211, the first calibration block 212 and the second calibration block 213 and the connection method therebetween are not limited.

[0099] As an example, the first correction block 212 may include a main body portion 2121 and two raised portions 2122 protruding from the main body portion 2121 along a first direction, the two raised portions 2122 are spaced apart along a second direction, and the gap between the two raised portions 2122 can be used to avoid the expansion mechanism 3.

[0100] The first correction block 212 and the second correction block 213 may both be connected to the base 211, or the first correction block 212 and the second correction block 213 may be connected to the base 211, and the second correction block 213 may be connected to the first correction block. For example, the first correction block 212 is connected to the base 211, and the second correction block 213 is connected to the first correction block 212. The first correction block 212 can move relative to the base 211 along a first direction and drive the second correction block 213 to move together, and the second correction block 213 can move relative to the first correction block 212 and the base 211 along a second direction.

[0101] Taking the example that the first correction block 212 is connected to the base 211 and the second correction block 213 is connected to the first correction block 212, the base 211 has a first slide rail extending in the first direction on one side surface facing the first correction block 212, and the first correction block 212 and the first slide rail slide together in the first direction, so as to achieve movement relative to the base 211 in the first direction. The connection module 31 may include a first power member 214 disposed on the base 211 and connected to the first correction block 212, and the first power member 214 is used to drive the first correction block 212 to move relative to the base 211 in the first direction. The first power member 214 may be an electric cylinder, an oil cylinder, a pneumatic cylinder, etc.

[0102] A second slide rail extending in the second direction may be provided on a side surface of the first correction block 212 away from the base 211, and the second correction block 213 slides and cooperates with the second slide rail in the second direction, thereby realizing movement relative to the base 211 in the second direction. The connection module 31 may also include a second power member 215 provided on the first correction block 212 and connected to the second correction block 213, and the second power member 215 is used to drive the second correction block 213 to move relative to the base 211 and the first correction block 212 in the second direction. The second power member 215 may be an electric cylinder, an oil cylinder, a pneumatic cylinder, etc.

[0103] In this embodiment, the first correction blocks 212 of the two correction modules 21 can move toward each other and abut against the opposite side surfaces (large surfaces) of the shell X along the first direction, thereby realizing the position adjustment of the shell X along the first direction, and the second correction blocks 213 of the two correction modules 21 can move toward each other and abut against the opposite side surfaces of the shell X along the second direction, thereby realizing the position adjustment of the shell X along the second direction. This correction method has high accuracy and is easy to control.

[0104] On the other hand, in this embodiment, since the correction blocks on both sides can simultaneously apply forces to the housing X, the correction blocks can correct the position of the housing X and also perform certain shaping on the housing X, thereby further improving the qualified assembly rate. For example, assuming that the opening of the housing X fails to fully recover after the end cover Y is assembled to the housing X, but is still in an expanded state, the two first correction blocks 212 can be driven to move toward each other and apply forces toward each other to the large surface of the housing X to recover the opening.

[0105] It should be noted that the implementation of the correction mechanism 2 is not limited thereto. For example, the correction mechanism 2 may include one or more mechanical arms, which can clamp the shell X and drive the shell X to move so as to correct the relative position of the shell X and the end cover Y.

[0106] In some embodiments, reference Figure 6The second calibration block 213 is disposed on a side of the first calibration block 212 away from the base 211 and is slidably matched with the first calibration block 212 along the second direction. In the direction pointing to the carrier 1 , the second calibration block 213 exceeds the end surface of the first calibration block 212 .

[0107] The direction pointing to the carrier 1 here is parallel to the first direction. The second correction block 213 exceeds the end face of the first correction block 212 along this direction, so that the second correction block 213 can be in contact with the opposite side surfaces of the shell X along the second direction to avoid interference with the first correction block 212.

[0108] The specific implementation of the sliding cooperation between the second correction block 213 and the first correction block 212 can refer to the description of the relevant parts above, which will not be repeated here.

[0109] In this embodiment, the second correction block 213 is slidably matched with the first correction block 212. In this way, in actual use, when the first correction block 212 moves relative to the base 211, it can drive the second correction block 213 to move relative to the base 211, thereby improving the movement efficiency of the correction mechanism 2 and further improving the assembly efficiency.

[0110] In some embodiments, reference Figure 6 Each correction module 21 includes two second limit blocks, which are respectively arranged on opposite sides of the first correction block 212 along the second direction.

[0111] In this embodiment, the two second correction blocks 213 can be configured to move synchronously relative to the base 211. Taking the correction module 21 mentioned above as an example, the second power member 215 can be connected to the two second correction blocks 213 at the same time with the help of a transmission mechanism, so that it can drive the two second correction blocks 213 to move synchronously toward or away from each other.

[0112] Alternatively, the two second correction blocks 213 may also be configured to be able to move independently relative to the base 211. Taking the correction module 21 mentioned above including the second power member 215 as an example, the second power member 215 may include two sub-power members, which are respectively connected to the two second correction modules 21.

[0113] In this embodiment, two second correction blocks 213 are provided on each correction module 21, that is, each correction module 21 can independently realize the position adjustment of the shell X in the second direction. In this way, when the position of the shell X along the first direction is not adjusted to the right position (in this case, only the second correction block 213 of one of the correction modules 21 may be able to come into contact with the shell X), the position adjustment of the shell X along the second direction can also be completed.

[0114] In some embodiments, reference Figure 1 and Figure 7 , the expansion mechanism 3 is arranged on the first correction block 212 .

[0115] Taking the above-mentioned expansion mechanism 3 including two connection modules 31 as an example, the two connection modules 31 can be respectively arranged on the two first correction blocks 212 .

[0116] The connection module 31 can be arranged on the side of the first correction block 212 facing the base 211, or on the side of the first correction block 212 away from the base 211, or on other directions of the first correction block 212, without limitation. The expansion mechanism 3 can be configured to be fixedly connected to the first correction block 212, or to be slidably connected to the first correction block 212 along the first direction, and those skilled in the art can make a specific determination based on the actual working mode of the expansion mechanism 3.

[0117] In this embodiment, the expanding mechanism 3 is arranged on the first correction block 212, so that the first correction block 212 can drive the expanding mechanism 3 to move along the first direction toward the carrier 1, without setting up an independent power mechanism to drive the expanding mechanism 3 to move relative to the carrier 1, thereby simplifying the overall structure of the assembly equipment, improving the operation efficiency of the expanding mechanism 3, and thus improving the assembly efficiency.

[0118] In some embodiments, the transfer equipment also includes a transport mechanism (not shown in the figure) for transporting the carrier 1.

[0119] The specific structure of the transfer mechanism is not limited, as long as it can transfer the carrier 1. As an example, the transfer mechanism can be a conveyor belt, a robotic arm, etc. In the actual production process, the assembly equipment can be set at the assembly station, and a pre-assembly station can be set upstream of the assembly station for assembling the shell X and the end cover Y into the carrier 1. A welding station can be set downstream of the assembly station. The welding station can specifically include a pre-welding station for pre-welding the shell X and the end cover Y and a full welding station for fully welding the shell X and the end cover Y. The transfer mechanism can be used to transfer the carrier 1 between the pre-assembly station, the assembly station and the welding station.

[0120] In this embodiment, a transfer mechanism is provided to transfer the carrier 1, so that the production process can be streamlined, and the assembly equipment does not need to perform pre-assembly, welding and other processes, thereby improving the efficiency of batch assembly.

[0121] The following will provide a more detailed and specific description of the assembly equipment involved in one or more of the above implementation modes in conjunction with a specific embodiment.

[0122] Reference Figure 1-Figure 7 The assembly equipment of the embodiment of the present application includes a carrier 1, a correction mechanism 2, a flaring mechanism 3 and a press-fitting mechanism 4.

[0123] The carrier 1 is used to carry the shell X and the end cover Y. The carrier 1 specifically includes a bottom plate and a limiter 12 arranged on the top side of the bottom plate, the positioning member 11 is used to fix the end cover Y, the limiter 12 and the positioning member 11 are arranged to form an activity space for the shell X to move, and the limiter 12 is used to constrain the shell X in the activity space.

[0124] The limiting member 12 includes two limiting posts 121 and at least two limiting arms 122. The limiting posts 121 are arranged on the top side of the positioning member 11 and extend in the height direction. The two limiting posts 121 are distributed along the second direction. At least one limiting arm 122 is arranged on one side of each limiting post 121 facing the other limiting post 121. Each limiting arm 122 includes two limiting pieces 1221 arranged at intervals in the first direction.

[0125] The first direction, the second direction and the height direction are perpendicular to each other. Here, the first direction is perpendicular to the large surface of the shell X. The large surface of the shell X refers to the surface with the largest area among the surfaces of the shell X. It should be noted that the orientation of the large surface of the shell X may change during the actual assembly process. The first direction here is determined based on the orientation of the large surface after the shell X is assembled in a desired manner.

[0126] The carrier 1 further includes a fixing member 13 and a locking member 14 . The fixing member 13 is movably connected to the limiting column 121 . The locking member 14 can operably lock the fixing member 13 at a position against the housing X so as to maintain the relative positions of the housing X and the end cover Y.

[0127] The correction mechanism 2 includes two correction modules 21, which are respectively arranged on opposite sides of the carrier 1 along the first direction. Each correction module 21 includes a base 211, and a first correction block 212 and a second correction block 213 arranged on the base 211. The first correction block 212 is slidably matched with the base 211 along the first direction, and the second correction block 213 is arranged on the side of the first correction block 212 away from the base 211 and is slidably matched with the first correction block 212 along the second direction. In the direction pointing to the carrier 1, the second correction block 213 exceeds the end face of the first correction block 212. Each correction module 21 includes two second limit blocks, which are respectively arranged on opposite sides of the first correction block 212 along the second direction.

[0128] The expansion mechanism 3 includes two connecting modules 31, which are respectively arranged on opposite sides of the carrier 1 along the first direction, and are respectively connected to the first correction blocks 212 of the two correction modules 21. Each connecting module 31 includes at least one suction nozzle 311 and a vacuum generator 312 connected to the suction nozzle 311. The vacuum generator 312 is used to generate negative pressure in the suction nozzle 311 so that the suction nozzle 311 can be adsorbed on a large surface.

[0129] The pressing mechanism 4 includes a pressing head 41 and a driving member 42 connected to the pressing head 41. The driving member 42 is used to drive the pressing head 41 to move toward the shell X. The surface of the pressing head 41 on one side facing the carrier 1 is recessed to form a positioning groove 41a. The positioning groove 41a can accommodate the shell X and form a clearance fit with the shell X.

[0130] In some embodiments, the assembly equipment further includes a transfer mechanism (not shown in the figure) for transferring the carrier 1 .

[0131] The assembly steps of the assembly equipment of the embodiment of the present application are as follows.

[0132] First, the end cover Y and the housing X are loaded into the carrier 1. This step can be completed manually or by a robot.

[0133] Next, the second correction blocks 213 are controlled to move toward each other along the second direction to correct the position of the housing X along the second direction, so that the housing X, the end cover Y, and the pressing head 41 are aligned in the second direction.

[0134] Next, the two first calibration blocks 212 are controlled to move toward the shell X, so that the suction nozzle 311 is close to the large surface of the shell X, and then the vacuum generator 312 is turned on, and the suction nozzle 311 is adsorbed on the large surface of the shell X to expand the opening of the shell X along the first direction. Optionally, after the suction nozzle 311 is adsorbed on the large surface of the shell X, the suction nozzle 311 can be controlled to move relative to the first calibration block 212 along the first direction, or the first calibration block 212 and the suction nozzle 311 can be controlled to move relative to the base 211 along the first direction to adjust the degree of expansion.

[0135] Next, the driving member 42 is controlled to drive the pressure head 41 to move toward the shell X. After the shell X enters the positioning groove 41a and abuts against the groove wall of the positioning groove 41a, the vacuum generator 312 is closed, and the pressure head 41 is continuously controlled to move toward the shell X, so that the shell X moves toward the end cover Y, thereby assembling the end cover Y into the shell X.

[0136] Next, the first correction block 212 is controlled to continue to move toward the shell X to correct the position of the shell X along the first direction. The correction here is mainly to make the distances between the opposite side edges of the end cover Y in the first direction and the opposite side edges of the shell X in the first direction substantially the same. Furthermore, in this step, while correcting, the large surface of the shell X can also be reshaped, reducing the probability that the large surface of the shell X is deformed by the expansion mechanism 3.

[0137] Finally, the locking member 14 is operated to lock the fixing member 13 at a position against the end surface of the housing X that is away from the end cover Y, so as to maintain the relative positions of the housing X and the end cover Y.

[0138] An embodiment of the present application further provides a production line for a battery device, which includes the assembly equipment described in any of the above embodiments.

[0139] The production line of the battery device of the embodiment of the present application has all the advantages of the assembly equipment described in any of the above embodiments, which will not be described in detail here.

[0140] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In the present application, the schematic representation of the above terms is not necessarily for 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. In addition, those skilled in the art may combine different embodiments or examples described in the present application and the features of different embodiments or examples without contradiction.

[0141] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An assembly device for assembling an end cover of a battery cell to a housing, characterized in that: The assembly equipment comprises: A carrier, used for carrying the shell and the end cover; A correction mechanism, used for correcting the relative position of the housing and the end cover; an expansion mechanism, used to expand the opening of the shell along a first direction, wherein the first direction is perpendicular to a large surface of the shell, the large surface being a surface with the largest area among all surfaces of the shell; and A press-fitting mechanism is used to assemble the end cover to the housing through the opening.

2. The assembly equipment according to claim 1, characterized in that The carrier includes a positioning member and a limiting member arranged on one side of the positioning member, the positioning member is used to fix the end cover, the limiting member and the positioning member are arranged to form an activity space for the shell to move, and the limiting member is used to constrain the shell within the activity space.

3. The assembly equipment according to claim 2, characterized in that: The limiting member includes two limiting columns and at least two limiting arms. The limiting column is arranged on the top side of the positioning member and extends along the height direction, the two limiting columns are distributed along the second direction, and the first direction, the second direction and the height direction are perpendicular to each other; At least one limiting arm is arranged on a side of each limiting column facing another limiting column, and each limiting arm includes two limiting pieces spaced apart in the first direction.

4. The assembly equipment according to claim 3, characterized in that The carrier further comprises a fixing member and a locking member, wherein the fixing member is movably connected to the limiting column, and the locking member can operably lock the fixing member in a position against the shell so as to maintain the relative position of the shell and the end cover.

5. The assembly equipment according to any one of claims 1 to 4, characterized in that: The expansion mechanism includes two connecting modules, which are respectively arranged on opposite sides of the carrier along the first direction. Each of the connecting modules includes at least one suction nozzle and a vacuum generator connected to the suction nozzle. The vacuum generator is used to generate negative pressure in the suction nozzle so that the suction nozzle can be adsorbed on the large surface.

6. The assembly equipment according to any one of claims 1 to 4, characterized in that: The press-fitting mechanism includes: a press head and a driving member connected to the press head, wherein the driving member is used to drive the press head to move toward the shell, and a surface of one side of the press head facing the carrier is recessed to form a positioning groove, and the positioning groove can accommodate the shell and form a clearance fit with the shell.

7. The assembly equipment according to any one of claims 1 to 4, characterized in that: The correction mechanism includes two correction modules, which are respectively arranged on opposite sides of the carrier along the first direction. Each of the correction modules includes a base, and a first correction block and a second correction block arranged on the base. The first correction block can move relative to the base along the first direction, and the second correction block can move relative to the base along the second direction. The first direction, the second direction and the height direction are perpendicular to each other.

8. The assembly device according to claim 7, characterized in that The second calibration block is disposed on a side of the first calibration block away from the base and is slidably matched with the first calibration block along the second direction. In the direction pointing to the carrier, the second calibration block exceeds the end surface of the first calibration block.

9. The assembly equipment according to claim 7, characterized in that Each of the correction modules includes two second correction blocks, which are respectively arranged on two opposite sides of the first correction block along the second direction.

10. The assembly equipment according to claim 7, characterized in that The expansion mechanism is arranged on the first correction block.

11. The assembly device according to any one of claims 1 to 4, characterized in that: The assembly equipment further comprises a transfer mechanism for transferring the carrier.

12. A production line for battery devices, characterized in that: The production line of battery devices comprises the assembly equipment according to any one of claims 1-11.

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