Nail pressing apparatus, electrolyte injection device, and battery production system

Abstract

A nail pressing apparatus, an electrolyte injection device, and a battery production system. The nail pressing apparatus comprises a mounting frame (10), a pressure applying part (20), a first driving part (30) and an elastic part (40). The pressure applying part (20) is movably connected to the mounting frame (10) in a first direction. The first driving part (30) is connected to the mounting frame (10) and comprises a driver (31) and a cam (32), wherein the driver (31) is connected to the cam (32) and is used for driving the cam (32) to rotate. The elastic part (40) is connected to the mounting frame (10) and the pressure applying part (20), is used for applying an elastic force to the pressure applying part (20) so that the pressure applying part (20) abuts against the cam (32), and is configured to move in the first direction when the cam (32) rotates.

Description

Nail pressing device, liquid injection equipment and battery production system

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese Patent Application No. 202420364952.0, filed on February 27, 2024, entitled “Nail Pressing Device, Liquid Injection Equipment and Battery Production System,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application relates to the field of battery technology, and in particular to a nail pressing device, liquid injection equipment and a battery production system. Background Art

[0004] With the development of new energy technology, batteries are used more and more widely, for example, in mobile phones, laptops, electric vehicles, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes and power tools.

[0005] During battery production, after electrolyte is injected into a battery cell through an injection hole, a sealing nail is installed in the injection hole using a nailing device to prevent leakage of the electrolyte inside the battery cell. The nailing yield of the nailing device directly affects the economic benefits of the battery. Therefore, how to effectively improve the nailing yield of the nailing device is a pressing issue in battery technology.

[0006] Summary of the Invention

[0007] In view of the above problems, the present application provides a nail pressing device, a liquid injection device and a battery production system, which can effectively improve the nail pressing yield of the nail pressing device.

[0008] In a first aspect, embodiments of the present application provide a nail pressing device, comprising a mounting frame, a pressure member, a first driving member, and an elastic member. The pressure member is movably connected to the mounting frame along a first direction. The first driving member is connected to the mounting frame and includes a driver and a cam. The driver is connected to the cam and is configured to drive the cam to rotate. The elastic member is connected to the mounting frame and the pressure member, and is configured to apply an elastic force to the pressure member to cause the pressure member to abut against the cam. The pressure member is configured to move along the first direction when the cam rotates.

[0009] The above technical solution achieves rapid linear movement of the pressure component along the first direction through the coordinated work between the first driving component and the elastic component, so that the pressure component can quickly and continuously perform multiple-frequency nail pressing operations, significantly shortening the working cycle and greatly improving the frequency of nail pressing per unit time, thereby improving the success rate of qualified sealing nails pressed into the injection hole. More noteworthy is that the efficient multiple-frequency nail pressing operation of the pressure component enables the device to accurately press sealing nails into the injection hole even when dealing with sealing nails with a certain degree of skewness. Overall, the nail pressing device of the above technical solution can effectively improve the nail pressing yield of the nail pressing device.

[0010] In some embodiments of the first aspect, the pressing device further includes a positioning member connected to the mounting frame, wherein a side of the positioning member facing away from the mounting frame is configured to abut against the battery cell. The positioning member defines a clearance hole extending through the positioning member in a first direction, and at least a portion of the pressing member is movably disposed within the clearance hole.

[0011] The above technical solution can not only improve the positioning accuracy and positioning efficiency of the nail pressing device by providing the positioning component, but also improve the stability and reliability of the entire nail pressing operation process, thereby further improving the nail pressing yield of the nail pressing device.

[0012] In some embodiments of the first aspect, the positioning component includes a buffer portion of the main body, the buffer portion is connected to a side of the main body away from the mounting bracket, and the stiffness of the buffer portion is less than the stiffness of the main body.

[0013] This technical solution utilizes a positioning component comprised of a main body and a buffer. The main body provides sturdy support, ensuring stability and reliability throughout the entire nailing process. Simultaneously, the buffer, with its low rigidity, effectively reduces mechanical impact and potential damage to the battery cells. Furthermore, the buffer's flexible construction allows for fine-tuning of positioning, significantly improving positioning accuracy. This cleverly balances the positioning component's structural stability with operational reliability.

[0014] In some embodiments of the first aspect, the cam includes a wheel body and a plurality of protrusions, the protrusions protruding from a circumferential sidewall of the wheel body, and the plurality of protrusions are spaced apart along the circumference of the wheel body.

[0015] The above technical solution can improve the nail pressing rhythm of the nail pressing device by arranging multiple convex parts on the cam, thereby facilitating the improvement of the nail pressing efficiency of the nail pressing device.

[0016] In some embodiments of the first aspect, the cam further includes a plurality of recessed portions, the recessed portions being recessed relative to a circumferential sidewall of the wheel body, and the plurality of recessed portions and the plurality of convex portions being alternately distributed along the circumference of the wheel body.

[0017] The above technical solution can increase the difference between the high point and the low point of the cam by introducing the recess. In other words, it can increase the amplitude of the cam, which is beneficial to increase the pressure applied by the pressure component to the sealing nail, thereby improving the nail pressing effect of the nail pressing device.

[0018] In some embodiments of the first aspect, the pressure-applying component includes a body and a roller, the roller is connected to the body and abuts against the cam, the roller is configured to rotate when the cam rotates, and the rotation axis of the roller is parallel to the rotation axis of the cam.

[0019] The above technical solution can reduce the direct friction between the pressure component and the cam by introducing the roller, thereby reducing the wear of the contact part between the pressure component and the cam. It can not only extend the service life of the nail pressing device and reduce maintenance costs, but also improve the smoothness of the nail pressing operation of the nail pressing device.

[0020] In some embodiments of the first aspect, the mounting frame includes a first bracket, the first bracket includes a first part and a second part, the pressure component and the first driving component are connected to the first part, the second part is provided with a guide hole, the guide hole passes through the second part along the first direction, and at least part of the pressure component can be movably passed through the guide hole.

[0021] The above technical solution divides the first bracket into structures according to different functions. The first part is used to carry the pressure component and the first driving component, and the second part is used to provide guidance for the pressure component. This not only improves the overall structural stability of the nail pressing device, but also optimizes the accuracy of the linear movement of the pressure component along the first direction.

[0022] In some embodiments of the first aspect, the nail pressing device further includes a first slide rail assembly extending in a first direction, and the pressure member is movably connected to the first portion via the first slide rail assembly. The slide rail assembly has high sliding precision and smoothness, thereby improving the consistency and accuracy of each nail pressing operation of the pressure member and reducing vibration and deviation during movement of the pressure member.

[0023] In some embodiments of the first aspect, the mounting bracket further includes a second bracket, and the first bracket is movably connected to the second bracket along the first direction.

[0024] The movable design of the first bracket in the above technical solution increases the operational flexibility of the nail pressing device, enabling it to easily adapt to work requirements at different heights or angles, thereby significantly improving the adaptability and flexibility of the nail pressing device.

[0025] In some embodiments of the first aspect, the nail pressing device further includes a second slide rail assembly extending in the first direction, and the first bracket is movably connected to the second bracket via the second slide rail assembly. The slide rail assembly has high sliding precision and smoothness, thereby improving the consistency and accuracy of each movement of the first bracket and reducing vibration and deviation during movement of the first bracket.

[0026] In some embodiments of the first aspect, the nail pressing device further includes a second driving component, which is connected to the first bracket and is used to drive the first bracket to move along the first direction.

[0027] By providing a second driving component to drive the first bracket to move, the position of the first bracket can be adjusted quickly and accurately, which reduces the work preparation time and improves the overall operating efficiency of the nail pressing device.

[0028] In some embodiments of the first aspect, the cam is provided with a plurality of openings, the openings extending along the axial direction of the cam, and the plurality of openings are arranged at intervals along the circumference of the cam.

[0029] The above technical solution provides an opening on the cam. On the one hand, during the assembly process of the cam, the relevant assembly tools can clamp the cam through the opening, thereby improving the convenience and efficiency of the cam assembly; on the other hand, the opening can also release stress, thereby improving the structural strength and service life of the cam; on the other hand, the opening can also reduce the overall weight of the cam. The lightweight cam is conducive to reducing the energy required by the nail pressing device during operation, which helps to reduce energy consumption and operating costs in long-term use.

[0030] In some embodiments of the first aspect, the elastic component includes a spring and a guide post, and the guide post is inserted into the spring.

[0031] The above technical solution combines a spring and a guide column in the elastic component to improve the linear movement and stability of the spring, reduce the radial displacement and distortion of the spring during compression and release, and improve the stability and accuracy of the movement of the pressure component, thereby further improving the nail pressing yield of the nail pressing device.

[0032] In a second aspect, the present application provides a liquid injection device, which includes a liquid injection device and a nail pressing device. The liquid injection device is used to inject electrolyte into the interior of the battery cell through the liquid injection hole, and the nail pressing device is used to press the sealing nail into the liquid injection hole.

[0033] In a third aspect, the present application provides a battery production system, which includes the liquid injection equipment provided by any embodiment of the second aspect.

[0034] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference symbols are used throughout the drawings to represent the same components. In the drawings:

[0036] FIG1 is a schematic diagram of the three-dimensional structure of a nail pressing device provided in some embodiments of the present application;

[0037] FIG2 is a schematic structural diagram of a nail pressing device provided by some embodiments of the present application from a first direction perspective;

[0038] FIG3 is a schematic structural diagram of a cam of a nail pressing device provided in some embodiments of the present application;

[0039] FIG4 is a schematic diagram of a partially enlarged structure of point H in FIG1 .

[0040] The figure numbers in the specific implementation manner are as follows: 10, mounting frame; 11, first bracket; 111, first part; 112, second part; 1121, guide hole; 12, second bracket; 20, pressure component; 21, main body; 22, roller; 30, first driving component; 31, driver; 32, cam; 321, wheel body; 322, convex part; 323, concave part; 324, opening; 40, elastic component; 41, spring; 42, guide column; 50, positioning component; 51, avoidance hole; 52, main body; 53, buffer part; 60, first slide rail assembly; 70, second slide rail assembly; 80, second driving component; X, first direction. DETAILED DESCRIPTION

[0041] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0042] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0043] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments.

[0044] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0045] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0046] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of this application, as well as the overall thickness, length, width, and other dimensions of the integrated device shown in the drawings are merely illustrative and should not constitute any limitation on this application.

[0047] The term "plurality" used in this application refers to two or more (including two).

[0048] In this application, the term "parallel" includes not only the absolutely parallel situation, but also the roughly parallel situation conventionally recognized in engineering; at the same time, "vertical" also includes not only the absolutely vertical situation, but also the roughly vertical situation conventionally recognized in engineering.

[0049] In this application, battery cells may include lithium-ion secondary battery cells, lithium-ion primary battery cells, lithium-sulfur battery cells, sodium-lithium-ion battery cells, sodium-ion battery cells, or magnesium-ion battery cells, and the embodiments of this application are not limited thereto. Battery cells may be cylindrical, flat, rectangular, or in other shapes, and the embodiments of this application are not limited thereto.

[0050] The battery mentioned in the embodiments of the present application may include one or more battery cells to provide a single physical module with higher voltage and capacity. When there are multiple battery cells, the multiple battery cells are connected in series, in parallel or in hybrid through a busbar.

[0051] In some embodiments, the battery may be a battery module; when there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module.

[0052] In some embodiments, the battery may be a battery pack, which includes a case and battery cells, wherein the battery cells or battery modules are housed in the case.

[0053] In some embodiments, the box body can be used as a part of the chassis structure of the vehicle. For example, part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0054] In some embodiments, the battery may be an energy storage device, including an energy storage container, an energy storage cabinet, and the like.

[0055] With the development of new energy technology, batteries are used more and more widely, for example, in mobile phones, laptops, electric vehicles, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes and power tools.

[0056] During the battery production process, after the electrolyte is injected into the battery cell through the injection hole, a sealing nail needs to be assembled in the injection hole through a nail pressing device to prevent the electrolyte inside the battery cell from leaking. The nail pressing yield of the nail pressing device will directly affect the economic benefits of the battery.

[0057] At present, a sealing nail is usually pre-installed on the liquid injection hole of the battery cell. Then, the pressure-applying component of the nail pressing device moves in a direction close to the sealing nail and applies pressure to the sealing nail to press the sealing nail into the liquid injection hole. Then, the pressure-applying component moves in a direction away from the sealing nail to return to the initial position, thereby completing a work cycle.

[0058] However, when pre-installed on the battery cell's injection hole, the sealant nail often becomes skewed to varying degrees. Furthermore, the sealant nail has a certain degree of elasticity, making it difficult for the nail pressing device to properly press the sealant nail into the injection hole in a single cycle. Furthermore, the pressing component in current nail pressing devices is typically driven by an electric cylinder for linear motion. This long and time-consuming process results in a long path for the pressing component in each cycle. Therefore, using multiple cycles to complete a single sealant nail pressing operation results in reduced efficiency for the entire nail pressing device.

[0059] Based on the above considerations, the present application designs a nail pressing device, which includes a mounting frame, a pressure component, a first driving component, and an elastic component. The pressure component is movably connected to the mounting frame along a first direction. The first driving component is connected to the mounting frame and includes a driver and a cam. The driver is connected to the cam and is used to drive the cam to rotate. The elastic component is connected to the mounting frame and the pressure component, and is used to apply elastic force to the pressure component to cause the pressure component to contact the cam. The pressure component is configured to move along the first direction when the cam rotates.

[0060] The driver drives the cam to rotate rapidly. During the rotation of the cam, when the position where the cam and the pressure component are in contact with each other moves from a low point to a high point, the cam can push the pressure component to move in a direction close to the sealing nail; when the position where the cam and the pressure component are in contact with each other moves from a high point to a low point, the elastic force exerted by the elastic component on the pressure component can drive the pressure component to move in a direction away from the sealing nail, so that the pressure component is reset.

[0061] In this way, through the coordinated work between the first driving component and the elastic component, the pressure component can achieve rapid linear movement along the first direction, so that the pressure component can quickly and continuously perform multiple-frequency nail pressing operations, the working cycle is significantly shortened, and the frequency of nail pressing per unit time is greatly improved, so that the success rate of qualified sealing nails pressed into the injection hole is improved. What is more noteworthy is that the efficient multiple-frequency nail pressing operation of the pressure component enables the device to accurately press the sealing nail into the injection hole even when dealing with a certain degree of skewness. In summary, the nail pressing device of the above technical solution can effectively improve the nail pressing yield of the nail pressing device.

[0062] The following first introduces the nail pressing device provided by the embodiments of the present application with reference to the accompanying drawings. Figure 1 is a schematic structural diagram of the nail pressing device provided by some embodiments of the present application.

[0063] As shown in FIG1 , an embodiment of the present application provides a nail pressing device, which includes a mounting frame 10, a pressure member 20, a first driving member 30, and an elastic member 40. The pressure member 20 is movably connected to the mounting frame 10 along a first direction X. The first driving member 30 is connected to the mounting frame 10 and includes a driver 31 and a cam 32. The driver 31 is connected to the cam 32 and is used to drive the cam 32 to rotate. The elastic member 40 is connected to the mounting frame 10 and the pressure member 20. The elastic member 40 is used to apply an elastic force to the pressure member 20 so that the pressure member 20 and the cam 32 are opposed. The pressure member 20 is configured to move along the first direction X when the cam 32 rotates.

[0064] For example, the mounting frame 10 serves as the foundation of the nailing device, primarily connecting various components of the device, such as the pressure member 20, the first drive member 30, and the elastic member 40, to provide a stable working foundation for the components. The mounting frame 10 can be made of, but is not limited to, metal or non-metallic materials. For example, metal materials can include copper, aluminum, or stainless steel; non-metallic materials can include polyethylene, polypropylene, polyvinyl chloride, or wood. For example, the mounting frame 10 can be made of a high-strength alloy to enhance structural strength and service life.

[0065] The function of the pressure component 20 is to apply pressure directly to the sealant nail. The pressure component 20 and the mounting frame 10 can be removably connected by providing a guide rail system, a ball screw, or a slider and a slot. As an example, when the pressure component 20 and the mounting frame 10 are removably connected by a slider and a slot, the pressure component 20 can be provided with a slider and the mounting frame 10 can be provided with a slot that matches the slider; alternatively, the pressure component 20 can be provided with a slot and the mounting frame 10 can be provided with a slider that matches the slot.

[0066] Optionally, the pressure member 20 may be made of, but is not limited to, metal or non-metal materials. For example, metal materials may be copper, aluminum, or stainless steel; non-metal materials may be polyethylene, polypropylene, polyvinyl chloride, or wood. As an example, the pressure member 20 may be made of a high-strength alloy material to improve performance stability.

[0067] The first driving component 30 drives the pressure component 20 to move along the first direction X, so that the pressure component 20 can apply pressure to the sealant nail. The cam 32 can be detachably connected to the driver 31 or integrally provided on the driver 31. The cam 32 can be directly connected to the driver 31 or restrained to the driver 31 by other components. By way of example, the connection between the cam 32 and the driver 31 can be, but is not limited to, bolting, welding, riveting, clamping, or bonding.

[0068] Optionally, the driver 31 may be, but is not limited to, a DC motor, an AC motor, a servo motor, or a stepper motor.

[0069] Optionally, the cam 32 may be made of, but is not limited to, metal or non-metal materials. For example, the metal material may be copper, aluminum, or stainless steel, and the non-metal material may be polyethylene, polypropylene, polyvinyl chloride, or wood. As an example, the cam 32 may be made of a high-strength alloy material to improve structural strength and service life.

[0070] The elastic member 40 provides the necessary restoring force for the pressure member 20, enabling the pressure member 20 to quickly and accurately return to its original position after each nail pressing operation. The elastic member 40 can apply a tensile stress to the pressure member 20 to cause the pressure member 20 to abut against the cam 32, or it can apply a compressive stress to cause the pressure member 20 to abut against the cam 32.

[0071] The elastic component 40 can be detachably connected to the mounting frame 10 and the pressure component 20, or it can be fixedly mounted on the mounting frame 10 and the pressure component 20. The elastic component 40 can be directly connected to the mounting frame 10 and the pressure component 20, or it can be restrained to the mounting frame 10 and the pressure component 20 by other components. As an example, the connection between the elastic component 40 and the mounting frame 10 and the connection between the elastic component 40 and the pressure component 20 can be, but are not limited to, bolting, welding, riveting, clamping, or bonding. Alternatively, the elastic component 40 can be, but is not limited to, a spring 41 or an elastic strip.

[0072] The pressure component 20 is configured to move in a first direction X when the cam 32 rotates. The driver 31 drives the cam 32 to rotate rapidly. During the rotation of the cam 32, as the position where the cam 32 abuts against the pressure component 20 moves from a low point to a high point, the cam 32 can push the pressure component 20 to move in a direction closer to the sealant nail. As the position where the cam 32 abuts against the pressure component 20 moves from a high point to a low point, the elastic force exerted by the elastic component 40 on the pressure component 20 can drive the pressure component 20 to move in a direction away from the sealant nail, thereby restoring the pressure component 20.

[0073] It should be noted that the high and low points of the cam 32 refer to the highest and lowest positions on the cam 32 profile. At the high point of the cam 32, the cam 32 pushes the pressure member 20 to its furthest position; at the low point of the cam 32, the pressure member 20 is closest to the axis of the cam 32. The difference between the high and low points of the cam 32 is the amplitude of the cam 32, which determines the total stroke length of the pressure member 20 in the first direction X.

[0074] In this way, the above technical solution achieves rapid linear movement of the pressure component 20 along the first direction X through the coordinated work between the first driving component 30 and the elastic component 40, so that the pressure component 20 can quickly and continuously perform multiple-frequency nail pressing operations, the working cycle is significantly shortened, and the frequency of nail pressing per unit time is greatly improved, so that the success rate of qualified sealing nails pressed into the injection hole is improved. More noteworthy is that the efficient multiple-frequency nail pressing operation of the pressure component 20 enables the device to accurately press the sealing nail into the injection hole even when dealing with a certain degree of skewness. In summary, the nail pressing device of the above technical solution can effectively improve the nail pressing yield of the nail pressing device.

[0075] FIG2 is a schematic structural diagram of a nail pressing device provided in some embodiments of the present application, viewed from a first direction.

[0076] Continuing with FIG. 2 , in some embodiments, the pressing device further includes a positioning member 50 connected to the mounting bracket 10 . The side of the positioning member 50 facing away from the mounting bracket 10 is configured to abut against the battery cell. The positioning member 50 defines a clearance hole 51 that extends through the positioning member 50 along the first direction X. At least a portion of the pressure member 20 is movably disposed within the clearance hole 51 .

[0077] For example, after the battery cell reaches the station where the nail pressing device is located, the positioning component 50 moves close to the battery cell and is close to the surface around the liquid injection port of the battery cell. The liquid injection port and the sealing nail pre-installed on the liquid injection port are located in the avoidance hole 51 of the positioning component 50. The portion of the pressure-applying component 20 that passes through the avoidance hole 51 can perform a nail pressing operation on the sealing nail. By aligning the avoidance hole 51 of the positioning component 50 with the liquid injection port on the battery cell and the sealing nail pre-installed on the liquid injection port, the positioning accuracy and efficiency of the nail pressing device on the battery cell can be improved. Moreover, the positioning component 50 can also abut against the battery cell to reduce the risk of the battery cell moving due to vibration during the nail pressing operation, which can improve the stability and reliability of the entire nail pressing operation.

[0078] The positioning member 50 can be detachably connected to the mounting frame 10 or fixedly mounted on the mounting frame 10. The elastic member 40 can be directly connected to the mounting frame 10 or secured to the mounting frame 10 by other components. For example, the connection between the elastic member 40 and the mounting frame 10 can be, but is not limited to, bolting, welding, riveting, clamping, or bonding.

[0079] Optionally, the positioning member 50 may be made of, but is not limited to, metal or non-metal materials. For example, metal materials may include copper, aluminum, or stainless steel; non-metal materials may include polyethylene, polypropylene, polyvinyl chloride, or wood. For example, the positioning member 50 may be made of a wear-resistant, high-strength material, such as steel or cemented carbide, to reduce the risk of damage or deformation due to repeated mechanical contact and increase its service life.

[0080] The dimension of the avoidance hole 51 in a direction perpendicular to the first direction X is slightly larger than the dimension of the pressure member 20 in a direction perpendicular to the first direction X, so as to improve the smoothness of movement of the pressure member 20 within the avoidance hole 51. The inner wall of the avoidance hole 51 can also be made smooth and wear-resistant to reduce friction with the pressure member 20 and minimize the risk of debris generation during operation.

[0081] The above technical solution can not only improve the positioning accuracy and positioning efficiency of the nail pressing device by providing the positioning component 50, but also improve the stability and reliability of the entire nail pressing operation process, thereby further improving the nail pressing yield of the nail pressing device.

[0082] In some embodiments, the positioning component 50 includes a buffer portion 53 of the main body 52 . The buffer portion 53 is connected to a side of the main body 52 away from the mounting bracket 10 . The rigidity of the buffer portion 53 is smaller than that of the main body 52 .

[0083] Exemplarily, the main body 52 is the supporting and connecting structure of the positioning member 50 and is connected to the mounting frame 10. The main body 52 can be made of a high-strength material, such as hardened steel or a high-performance alloy, to enhance rigidity and durability, resist various forces that may occur during the nailing process, and improve the connection strength between the positioning member 50 and the mounting frame 10.

[0084] The buffer portion 53 is the part of the positioning component 50 that is used to abut against the battery cell. The rigidity of the buffer portion 53 is less than that of the main body 52. ​​It can provide a certain degree of flexibility and buffering capacity when the positioning component 50 contacts the battery cell. During the nail pressing process, the damage of the positioning component 50 to the battery cell can be reduced.

[0085] The buffer portion 53 can be made of rubber, silicone, or other highly elastic materials, which effectively absorb shock and reduce potential damage to the workpiece caused by hard contact. Furthermore, the elastic properties of the buffer portion 53 allow for slight adjustments in its structure when contacting the battery cell, allowing it to more closely conform to the actual structure and shape of the battery cell's liquid injection port, further improving positioning accuracy.

[0086] The buffer portion 53 can be detachably connected to the main body 52 or fixedly mounted on the main body 52. ​​The buffer portion 53 can be directly connected to the main body 52 or secured to the main body 52 via other components. For example, the connection between the buffer portion 53 and the main body 52 can be, but is not limited to, bolting, welding, riveting, clamping, or bonding.

[0087] The above technical solution configures the positioning component 50 to include a main body 52 and a buffer portion 53. The main body 52 provides sturdy support, ensuring the stability and reliability of the positioning component 50 throughout the nailing process. Simultaneously, the buffer portion 53, with its low rigidity, effectively reduces mechanical impact and potential damage to the battery cells. Furthermore, the buffer portion's flexible construction allows for fine-tuning of positioning, significantly improving positioning accuracy. This cleverly balances the structural stability and operational reliability of the positioning component 50.

[0088] FIG3 is a schematic structural diagram of a cam of a nail pressing device provided in some embodiments of the present application.

[0089] 3 , in some embodiments, the cam 32 includes a wheel body 321 and a plurality of protrusions 322 . The protrusions 322 protrude from the circumferential sidewall of the wheel body 321 . The plurality of protrusions 322 are spaced apart along the circumference of the wheel body 321 .

[0090] For example, the wheel body 321 is connected to the driver 31, and the protrusion 322 is a portion protruding from the circumferential sidewall of the wheel body 321. The highest point of the cam 32 is the highest position of the protrusion 322. The cam 32 contacts the pressure member 20 via its protrusion 322, converting the rotational motion of the driver 31 into linear motion of the pressure member 20.

[0091] The number of protrusions 322 can be two, three, four, or more. Each protrusion 322, when passing over the pressure member 20, pushes the pressure member 20 in the first direction X to perform one nail pressing operation. Thus, the number of nail pressing operations that the cam 32 can push the pressure member 20 to perform per one rotation is positively correlated with the number of protrusions 322. For example, if there are four protrusions 322, one rotation of the cam 32 can push the pressure member 20 to perform four nail pressing operations.

[0092] Optionally, the wheel body 321 and the protrusion 322 are integrally formed. This simplifies the manufacturing process by eliminating the need for an additional joining process. Furthermore, the integral structure provides a stronger connection between the wheel body 321 and the protrusion 322 than would be achieved by a separate joining process.

[0093] Optionally, the profile of the protrusion 322 may be arc-shaped, so that the amplitude of the cam 32 can change smoothly, thereby improving the smoothness of the linear movement of the pressure member 20 .

[0094] The above technical solution can improve the nail pressing rhythm of the nail pressing device by providing a plurality of protrusions 322 on the cam 32, thereby facilitating the improvement of the nail pressing efficiency of the nail pressing device.

[0095] In some embodiments, the cam 32 further includes a plurality of recesses 323 , which are recessed relative to the circumferential sidewall of the wheel body 321 . The plurality of recesses 323 and the plurality of protrusions 322 are alternately distributed along the circumference of the wheel body 321 .

[0096] For example, the recess 323 is a portion recessed from the circumferential sidewall of the wheel body 321, and the lowest point of the cam 32 is the lowest point of the recess 323. As the cam 32 rotates, the pressure member 20 passes through the protrusion 322 and gradually enters the recess 323. The elastic force exerted by the elastic member 40 on the pressure member 20 drives the pressure member 20 away from the sealant nail, thereby returning the pressure member 20 to its original position.

[0097] The number of the concave portions 323 may be two, three, four or more. As an example, the number of the concave portions 323 matches the number of the convex portions 322 .

[0098] Optionally, the profile of the recess 323 may be arc-shaped, so that the amplitude of the cam 32 can change smoothly, thereby improving the smoothness of the linear movement of the pressing component 20 .

[0099] The above technical solution can increase the difference between the high point and the low point of the cam 32 by introducing the recess 323. In other words, it can increase the amplitude of the cam 32, which is beneficial to increase the pressure applied by the pressure component 20 to the sealing nail, thereby improving the nail pressing effect of the nail pressing device.

[0100] In some embodiments, the pressure component 20 includes a body 21 and a roller 22 . The roller 22 is connected to the body 21 and abuts against the cam 32 . The roller 22 is configured to rotate when the cam 32 rotates, and the rotation axis of the roller 22 is parallel to the rotation axis of the cam 32 .

[0101] For example, the body 21 of the pressure component 20 is the main structure that applies pressure to the sealant nail. The roller 22 is connected to the body 21 and directly contacts the cam 32. When the cam 32 rotates, the roller 22 itself rotates under the action of the rotation of the cam 32. The rotation of the roller 22 can reduce the direct friction between the pressure component 20 and the cam 32, thereby reducing the wear of the contact portion between the pressure component 20 and the cam 32. This not only extends the service life of the nail pressing device, but also improves the smoothness of the nail pressing operation of the nail pressing device.

[0102] The rotation axis of the roller 22 is parallel to the rotation axis of the cam 32. This design improves the smoothness of the interaction between the roller 22 and the cam 32, so that the roller 22 can rotate accordingly according to the rotation of the cam 32, thereby effectively transmitting pressure to the body 21.

[0103] The roller 22 can be detachably connected to the body 21 or fixedly mounted on the body 21. The roller 22 can be directly connected to the body 21 or secured to the body 21 via other components. For example, the connection between the roller 22 and the body 21 can be, but is not limited to, bolting, welding, riveting, clamping, or bonding.

[0104] Optionally, the roller 22 may be made of, but is not limited to, metal or non-metal materials. For example, metal materials may include copper, aluminum, or stainless steel; non-metal materials may include polyethylene, polypropylene, polyvinyl chloride, or wood. For example, the roller 22 may be made of a material with high wear resistance and load-bearing capacity, such as hardened steel or an alloy with a wear-resistant coating, to reduce the risk of damage or deformation due to repeated mechanical contact and increase its service life.

[0105] The above technical solution can reduce the direct friction between the pressure component 20 and the cam 32 by introducing the roller 22, thereby reducing the wear of the contact part between the pressure component 20 and the cam 32. It can not only extend the service life of the nail pressing device and reduce maintenance costs, but also improve the smoothness of the nail pressing operation of the nail pressing device.

[0106] In some embodiments, the mounting frame 10 includes a first bracket 11, the first bracket 11 includes a first part 111 and a second part 112, the pressure component 20 and the first driving component 30 are connected to the first part 111, the second part 112 is provided with a guide hole 1121, the guide hole 1121 passes through the second part 112 along the first direction X, and at least part of the pressure component 20 can be movably passed through the guide hole 1121.

[0107] For example, the first portion 111 is a base structure connecting the pressure component 20 and the first driving component 30, providing a stable working foundation for the pressure component 20 and the first driving component 30. The second portion 112 is provided with a guide hole 1121, so that the main function of the second portion 112 is to provide guidance for the pressure component 20. During the linear motion of the pressure component 20 along the first direction X, the guide hole 1121 can limit the portion of the pressure component 20 located within the guide hole 1121 in a direction perpendicular to the first direction X, thereby reducing the amount of deflection of the pressure component 20 in a direction perpendicular to the first direction X during movement.

[0108] The second portion 112 can be detachably connected to the first portion 111 or integrally provided on the first portion 111. The second portion 112 can be directly connected to the first portion 111 or secured to the first portion 111 via other components. For example, the connection between the second portion 112 and the first portion 111 can be, but is not limited to, bolting, welding, riveting, clamping, or bonding.

[0109] Optionally, the first portion 111 and the second portion 112 are integrally formed. This simplifies the manufacturing process by eliminating the need for an additional joining process. Furthermore, compared to joining the first portion 111 and the second portion 112 through an additional joining process, the integral structure provides a stronger connection between the first portion 111 and the second portion 112.

[0110] The dimension of the guide hole 1121 in a direction perpendicular to the first direction X is slightly larger than the dimension of the pressure member 20 in a direction perpendicular to the first direction X, so as to improve the smoothness of movement of the pressure member 20 in the guide hole 1121. The inner wall of the guide hole 1121 can also be made smooth and wear-resistant to reduce friction with the pressure member 20 and minimize the risk of debris generation during operation.

[0111] The above technical solution divides the first bracket 11 into structures according to different functions. The first part 111 is used to carry the pressure component 20 and the first driving component 30, and the second part 112 is used to provide guidance for the pressure component 20. This not only improves the overall structural stability of the nail pressing device, but also optimizes the accuracy of the linear motion of the pressure component 20 along the first direction X.

[0112] In some embodiments, the nail pressing device further includes a first slide rail assembly 60 extending along a first direction X. The pressure member 20 is movably connected to the first portion 111 via the first slide rail assembly 60. The slide rail assembly has high sliding precision and smoothness, which can improve the consistency and accuracy of each nail pressing operation of the pressure member 20 and reduce vibration and deviation during the movement of the pressure member 20.

[0113] In some embodiments, the mounting bracket 10 further includes a second bracket 12 , and the first bracket 11 is movably connected to the second bracket 12 along the first direction X.

[0114] For example, after a battery cell reaches the press-stitching station, the first bracket 11 moves, driving the pressure component 20 and the first drive component 30 toward the battery cell, ensuring that the relative position and distance between the pressure component 20 and the sealant meet the requirements. The movable connection between the first bracket 11 and the second bracket 12 can be achieved, but is not limited to, through a mechanical structure such as a guide rail system, a slider, or a ball screw.

[0115] Optionally, the second bracket 12 may be made of, but is not limited to, a metal or non-metal material. For example, the metal material may be copper, aluminum, or stainless steel; the non-metal material may be polyethylene, polypropylene, polyvinyl chloride, or wood. As an example, the first bracket 11 and the second bracket 12 may be made of the same material to simplify the manufacturing process and reduce costs.

[0116] The movable design of the first bracket 11 in the above technical solution increases the operational flexibility of the nail pressing device, enabling it to easily adapt to work requirements at different heights or angles, thereby significantly improving the adaptability and flexibility of the nail pressing device.

[0117] In some embodiments, the nail pressing device further includes a second slide rail assembly 70 extending along the first direction X. The first bracket 11 is movably connected to the second bracket 12 via the second slide rail assembly 70. The slide rail assembly has high sliding precision and smoothness, which can improve the consistency and accuracy of each movement of the first bracket 11 and reduce vibration and deviation during the movement of the first bracket 11.

[0118] In some embodiments, the nail pressing device further includes a second driving component 80 , which is connected to the first bracket 11 and is used to drive the first bracket 11 to move along the first direction X.

[0119] For example, the second driving component 80 may be, but is not limited to, an electric cylinder, a DC motor, an AC motor, a stepping motor, or a servo motor.

[0120] By providing the second driving component 80 to drive the first bracket 11 to move, the position of the first bracket 11 can be adjusted quickly and accurately, which reduces the work preparation time and improves the overall operating efficiency of the nail pressing device.

[0121] In some embodiments, the cam 32 is provided with a plurality of openings 324 . The openings 324 extend along the axial direction of the cam 32 . The plurality of openings 324 are spaced apart along the circumference of the cam 32 .

[0122] For example, the opening 324 may extend through the cam 32 along its axis, or may be recessed into at least one of the axially opposed surfaces of the cam 32. The number of openings 324 may be, but is not limited to, two, three, four, or more, and may be selected based on the actual application environment.

[0123] Optionally, the projection of the opening 324 along the axial direction of the cam 32 may be, but is not limited to, a circle, a triangle, a rectangle, a trapezoid, or an ellipse.

[0124] The above technical solution provides an opening 324 on the cam 32. On the one hand, during the assembly process of the cam 32, relevant assembly tools can clamp the cam 32 through the opening 324, thereby improving the assembly convenience and efficiency of the cam 32; on the other hand, the opening 324 can also release stress, thereby improving the structural strength and service life of the cam 32; on the other hand, the opening 324 can also reduce the overall weight of the cam 32. The lightweight cam 32 is conducive to reducing the energy required by the nail pressing device during operation, which helps to reduce energy consumption and operating costs in long-term use.

[0125] FIG4 is a schematic diagram of a partially enlarged structure of point H in FIG1 .

[0126] Continuing to refer to FIG. 4 , in some embodiments, the elastic component 40 includes a spring 41 and a guide post 42 , and the guide post 42 is inserted into the spring 41 .

[0127] For example, spring 41 serves as the primary elastic element in elastic component 40, providing the necessary restoring force for pressure component 20. A guide post 42 is inserted into spring 41. Its primary function is to enhance the linear motion and stability of spring 41, thereby reducing radial displacement and distortion of spring 41 during compression and release, thereby improving the stability and precision of the motion of pressure component 20.

[0128] The guide post 42 is connected to the mounting frame 10. The guide post 42 may be detachably connected to the mounting frame 10 or integrally mounted on the mounting frame 10. The guide post 42 may be directly connected to the mounting frame 10 or secured to the mounting frame 10 via other components. For example, the connection between the guide post 42 and the mounting frame 10 may be, but is not limited to, bolting, welding, riveting, clamping, or bonding.

[0129] Optionally, the guide post 42 may be made of, but is not limited to, a metal or non-metal material. For example, the metal material may be copper, aluminum, or stainless steel; the non-metal material may be polyethylene, polypropylene, polyvinyl chloride, or wood. As an example, the guide post 42 may be made of a high-strength alloy material to improve structural strength and service life.

[0130] The above technical solution combines the spring 41 and the guide column 42 in the elastic component 40 to improve the linear movement and stability of the spring 41, reduce the radial displacement and distortion of the spring 41 during compression and release, and improve the stability and accuracy of the movement of the pressure component 20, thereby further improving the nail pressing yield of the nail pressing device.

[0131] According to some embodiments of the present application, the present application also provides a liquid injection device, which includes a liquid injection device and a nail pressing device of any of the above schemes. The liquid injection device is used to inject electrolyte into the interior of the battery cell through the liquid injection hole, and the nail pressing device is used to press the sealing nail into the liquid injection hole.

[0132] According to some embodiments of the present application, the present application also provides a battery production system, including the liquid injection equipment of any of the above solutions.

[0133] In order to better understand the nail pressing device provided in the embodiment of the present application, based on the same inventive concept, an embodiment of the above-mentioned nail pressing device in actual application is provided here for illustration.

[0134] The present application provides a nail pressing device, comprising a mounting frame 10, a pressure member 20, a first driving member 30, an elastic member 40, a positioning member 50, and a second driving member 80. The mounting frame 10 comprises a first bracket 11 and a second bracket 12, wherein the first bracket 11 is movably connected to the second bracket 12 via a second slide rail assembly 70. The first bracket 11 comprises a first portion 111 and a second portion 112, wherein the pressure member 20 is movably connected to the first portion 111 via a first slide rail assembly 60. The first driving member 30 is fixedly connected to the first portion 111, and the second portion 112 defines a guide hole 1121 extending through the second portion 112 along a first direction X. At least a portion of the pressure member 20 is movably disposed within the guide hole 1121. The first slide rail assembly 60 and the second slide rail assembly 70 both extend along the first direction X. The second driving member 80 is connected to the first bracket 11 and is configured to drive the first bracket 11 to move along the first direction X.

[0135] The pressure member 20 includes a body 21 and a roller 22 . The roller 22 is connected to the body 21 and abuts against the cam 32 . The roller 22 is configured to rotate when the cam 32 rotates. The rotation axis of the roller 22 is parallel to the rotation axis of the cam 32 .

[0136] The first driving component 30 is connected to the mounting frame 10 and includes a driver 31 and a cam 32. The driver 31 is connected to the cam 32 and is used to drive the cam 32 to rotate. The cam 32 includes a wheel body 321, a plurality of protrusions 322, and a plurality of recesses 323. The protrusions 322 protrude from the circumferential sidewall of the wheel body 321, and the recesses 323 are recessed relative to the circumferential sidewall of the wheel body 321. The plurality of recesses 323 and the plurality of protrusions 322 are alternately distributed along the circumference of the wheel body 321.

[0137] The elastic component 40 is connected to the mounting frame 10 and the pressure component 20. The elastic component 40 is used to apply elastic force to the pressure component 20 so that the pressure component 20 is against the cam 32. The elastic component 40 includes a spring 41 and a guide column 42. The guide column 42 is inserted into the spring 41. The pressure component 20 is configured to move along the first direction X when the cam 32 rotates.

[0138] The positioning member 50 is connected to the mounting frame 10. The side of the positioning member 50 facing away from the mounting frame 10 is configured to abut against the battery cell. The positioning member 50 defines a clearance hole 51 that extends through the positioning member 50 along the first direction X. At least a portion of the pressure member 20 is movably disposed within the clearance hole 51.

[0139] In this way, through the coordinated work between the first driving component 30 and the elastic component 40, the pressure component 20 can achieve rapid linear movement along the first direction X, so that the pressure component 20 can quickly and continuously perform multiple-frequency nail pressing operations, the working cycle is significantly shortened, and the frequency of nail pressing per unit time is greatly improved, so that the success rate of qualified sealing nails pressed into the injection hole is improved. More noteworthy is that the efficient multiple-frequency nail pressing operation of the pressure component 20 enables the device to accurately press the sealing nail into the injection hole even when dealing with a certain degree of skewness. In summary, the nail pressing device of the above technical solution can effectively improve the nail pressing yield of the nail pressing device.

[0140] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0141] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A nail pressing device, comprising: Mounting rack; a pressure member movably connected to the mounting bracket along a first direction; a first driving component connected to the mounting bracket, the first driving component comprising a driver and a cam, the driver being connected to the cam and configured to drive the cam to rotate; An elastic component is connected to the mounting bracket and the pressure component, and is used to apply elastic force to the pressure component so that the pressure component and the cam are pressed against each other. The pressure component is configured to move along the first direction when the cam rotates.

2. The nail pressing device according to claim 1, wherein: The nail pressing device further includes a positioning component connected to the mounting frame, wherein a side of the positioning component away from the mounting frame is used to abut against the battery cell; The positioning component is provided with an avoidance hole, which penetrates the positioning component along the first direction, and at least a portion of the pressure component is movably disposed in the avoidance hole.

3. The nail pressing device according to claim 2, wherein: The positioning component includes a buffer portion of the main body, the buffer portion is connected to a side of the main body away from the mounting bracket, and the rigidity of the buffer portion is smaller than the rigidity of the main body.

4. The nail pressing device according to any one of claims 1 to 3, wherein: The cam includes a wheel body and a plurality of protrusions. The protrusions protrude from a circumferential side wall of the wheel body. The plurality of protrusions are spaced apart along the circumference of the wheel body.

5. The nail pressing device according to claim 4, wherein: The cam further includes a plurality of recessed portions, the recessed portions being recessed relative to a circumferential side wall of the wheel body, and the plurality of recessed portions and the plurality of convex portions being alternately distributed along the circumference of the wheel body.

6. The nail pressing device according to any one of claims 1 to 5, wherein: The pressure component includes a body and a roller, the roller is connected to the body and abuts against the cam, the roller is configured to rotate when the cam rotates, and a rotation axis of the roller is parallel to a rotation axis of the cam.

7. The nail pressing device according to any one of claims 1 to 6, wherein: The mounting frame includes a first bracket, the first bracket includes a first part and a second part, the pressure component and the first driving component are connected to the first part, the second part is provided with a guide hole, the guide hole passes through the second part along the first direction, and at least part of the pressure component can be movably passed through the guide hole.

8. The nail pressing device according to claim 7, wherein: The nail pressing device further includes a first slide rail assembly, which is extended along the first direction. The pressure component is movably connected to the first part through the first slide rail assembly.

9. The nail pressing device according to claim 7, wherein: The mounting bracket further includes a second bracket, and the first bracket is movably connected to the second bracket along a first direction.

10. The nail pressing device according to claim 9, wherein: The nail pressing device further includes a second slide rail assembly, which is extended along the first direction, and the first bracket is movably connected to the second bracket through the second slide rail assembly.

11. The nail pressing device according to claim 9, wherein: The nail pressing device further includes a second driving component, which is connected to the first bracket and is used to drive the first bracket to move along the first direction.

12. The nail pressing device according to any one of claims 1 to 11, wherein: The cam is provided with a plurality of openings, the openings extending along the axial direction of the cam, and the plurality of openings are arranged at intervals along the circumferential direction of the cam.

13. The nail pressing device according to any one of claims 1 to 12, wherein: The elastic component includes a spring and a guide post, and the guide post is inserted into the spring.

14. A liquid injection device comprising: A liquid injection device, used to inject electrolyte into the interior of the battery cell through the liquid injection hole; The nail pressing device according to any one of claims 1 to 13 is used to press the sealing nail into the injection hole.

15. A battery production system comprising the liquid injection device according to claim 14.

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