A cylindrical battery sealing and welding device

Abstract

The utility model discloses a cylindrical battery sealing welding device, it includes the carrier plate, is arranged in the front pressure head and rear pressure head for clamping the both ends of cylindrical battery on the carrier plate, wherein the front pressure head is installed on the first vertical board with the fixed carrier plate, wherein the rear pressure head is installed on the second vertical board with the sliding cooperation of carrier plate, is equipped with the telescopic drive mechanism for driving second vertical board under the carrier plate, and the front pressure head and rear pressure head are rotated and are cooperated in respective corresponding vertical board, is equipped with the rotating motor for driving the rotation of front pressure head on the first vertical board, the end face of front pressure head and rear pressure head is equipped with the clamping groove matched with the positive pole and negative pole column on cylindrical battery respectively, is equipped with the positioning mechanism for limiting the circumferential rotation position of rear pressure head on the second vertical board, is equipped with a plurality of support wheels on the carrier plate and is in contact with the outside wall of cylindrical battery. The utility model provides a cylindrical battery sealing welding device, and the positive pole and negative pole column of cylindrical battery both ends can keep consistent before welding.

Description

Technical Field

[0001] This utility model relates to the technical field of battery sealing and welding equipment, specifically a cylindrical battery sealing and welding device. Background Technology

[0002] With the rapid development of the global new energy industry, lithium batteries, as a highly efficient and environmentally friendly energy storage solution, are receiving increasing attention. Whether in electric vehicles, portable electronic devices, or energy storage systems, the widespread application of lithium batteries has driven continuous technological advancements. Lithium battery assembly is a crucial step in the entire battery production process, and its quality directly affects battery performance and safety. The assembly process of lithium batteries can be divided into several key steps, including flattening or pressing the cells, welding the current collector, overmolding, bottom penetration welding, sidewall welding, and sealing welding. Among these, sealing welding is extremely important. Existing sealing welding machines use laser welding to weld the negative electrode cover of the cylindrical battery to the cylindrical shell, creating a sealed state for the entire shell (leaving only the injection hole). However, the orientation of the negative electrode post on the negative electrode cover is uncertain in this existing technology. Therefore, direct welding will result in inconsistencies in the orientation of the positive and negative electrode posts at both ends of the cylindrical battery, thus affecting subsequent processes such as electrolyte injection, formation, and sealing pin welding. Utility Model Content

[0003] The present invention aims to at least partially solve one of the technical problems in the related art: to provide a cylindrical battery sealing and welding device that enables the positive and negative terminals at both ends of the cylindrical battery to maintain the same orientation before welding.

[0004] Therefore, one objective of this utility model is to provide a cylindrical battery sealing and welding device, which includes a carrier plate, a front pressure head and a rear pressure head arranged on the carrier plate for clamping both ends of the cylindrical battery. The front pressure head is mounted on a first upright plate fixed to the carrier plate, and the rear pressure head is mounted on a second upright plate that slides with the carrier plate. A telescopic drive mechanism for driving the second upright plate is provided below the carrier plate. The front pressure head and the rear pressure head are rotatably engaged with their respective first and second upright plates. A rotary motor for driving the front pressure head to rotate is provided on the first upright plate. The opposite end faces of the front pressure head and the rear pressure head are respectively provided with slots that match the positive and negative terminals on the ends of the cylindrical battery. A positioning mechanism for limiting the circumferential rotation position of the rear pressure head is provided on the second upright plate. The carrier plate is provided with several support wheels that abut against the outer side wall of the cylindrical battery. The positioning mechanism can limit the circumferential rotation position of the rear pressure head, so that the slots on the rear pressure head face vertically upwards before each clamping of the cylindrical battery to be welded, thereby ensuring that the positive and negative terminals at both ends of the welded cylindrical battery face the same direction.

[0005] According to an example of this utility model, the positioning mechanism includes a telescopic cylinder located below the rear pressure head and fixed to a second vertical plate. A locking block is provided on the piston rod of the telescopic cylinder. The outer wall of the rear pressure head has a notch that matches the locking block. When the rear pressure head rotates to a vertical position where the locking groove on the rear pressure head is vertical, the notch on the outer wall of the rear pressure head is located at the bottom of the rear pressure head and corresponds to the position of the locking block, allowing the telescopic cylinder to drive the locking block upwards into the notch or downwards out of the notch. Before each clamping of the cylindrical battery to be welded, the telescopic cylinder drives the locking block into the notch. The insertion of the locking block into the notch forces the position of the rear pressure head to be reset and corrected, correcting the offset of the rear pressure head after the previous welding, thereby ensuring that the negative electrode cover of each cylindrical battery is aligned with the positive electrode.

[0006] The rear pressure head is provided with a rotating shaft, which is rotatably engaged with a bearing hole on the second vertical plate, and the end of the rotating shaft opposite to the rear pressure head extends to the outside of the second vertical plate. The notch is located on the outer wall of the rotating shaft, and the telescopic cylinder is arranged below the rotating shaft and corresponds to the notch.

[0007] According to one example of this utility model, the locking block is a triangular structure that is smaller at the top and larger at the bottom. The triangular structure of the locking block provides two inclined surfaces. When it mates with a notch of the same shape, the inclined surfaces act as guides, thereby causing the rear pressure head to be repositioned to a vertically upward-facing position within the slot by the force exerted by the inclined surfaces.

[0008] According to one example of this utility model, the support wheels on the carrier plate are in at least two sets, each set including two support wheels. The two support wheels in the same set are arranged along the width direction on both sides of the cylindrical battery to support the cylindrical battery and allow the cylindrical battery to rotate around its own axis. The two sets of support wheels allow the cylindrical battery to be placed directly laterally on the support wheels, ensuring that the centerline of the cylindrical battery is aligned with the axes of the two pressure heads.

[0009] According to one example of this utility model, there are two sets of support wheels on the carrier plate.

[0010] According to one example of this utility model, the two support wheels in the same group include a fixed wheel and a movable wheel. The fixed wheel is fixed to the carrier plate by a bracket, and the bracket is provided with a slider that slides along the width direction. The movable wheel is mounted on the slider, and the bracket is provided with an adjustment mechanism for driving the slider to reciprocate. By using one fixed wheel and one movable wheel, the debugging personnel can first install the fixed wheel in place, and then adjust the movable wheel to its proper position using the adjustment mechanism, thereby making the adjustment process of the support wheel position more convenient.

[0011] According to an example of the present invention, the adjustment mechanism includes a first lead screw arranged along the width direction and a nut threadedly driven to the first lead screw. The nut is fixed to the slider. One end of the first lead screw is exposed outside the bracket, and the exposed end of the first lead screw is provided with a handle for driving the first lead screw to rotate.

[0012] According to one example of the present invention, both the front pressure head and the rear pressure head are made of copper or copper-containing metal.

[0013] The above technical solution has the following advantages or beneficial effects: First, the rear pressure head has a slot that matches the negative terminal, and the rear pressure head can correct its circumferential rotation position through a positioning mechanism before clamping the cylindrical battery each time, thereby ensuring that the orientation of the negative terminal inserted into the slot of the rear pressure head is consistent with the orientation of the positive terminal of the cylindrical battery. Therefore, after the cylindrical battery is welded, the terminals at both ends maintain the same orientation, which facilitates subsequent processing. Second, the method of using a telescopic cylinder to drive the clamping block into the notch on the outer wall of the rear pressure head is not only simple in structure, but also applies a force to the rear pressure head during the process of the clamping block being inserted into the notch, thereby allowing the rear pressure head, which has undergone a small-angle displacement, to... The system is designed to be reset, and before each cylindrical battery welding, the circumferential position is calibrated using this clip to ensure that the orientation of the terminals at both ends of each cylindrical battery is within the allowable error range after welding. Secondly, the cylindrical battery to be welded is supported by at least two sets of support wheels, which not only facilitates the placement of the cylindrical battery but also ensures that the center line of the cylindrical battery is well aligned with the axis of the two pressure heads, improving the processing efficiency of the cylindrical battery. Finally, the two support wheels in the same set are divided into fixed wheels and movable wheels, and the movable wheel is adjusted by using a first lead screw and a slider, thus making the installation and adjustment of the two support wheels in the same set more efficient.

[0014] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0015] Figure 1 This is an isometric view of the cylindrical battery sealing and welding device of this utility model.

[0016] Figure 2 for Figure 1 A disassembly diagram showing the separation of the cylindrical battery.

[0017] Figure 3 for Figure 1 A front view schematic diagram of the sealing and welding device for a cylindrical battery.

[0018] Figure 4 for Figure 1Right view schematic diagram of the sealing and welding device for the cylindrical battery.

[0019] Figure 5 for Figure 1 A top view of the sealing and welding device for a cylindrical battery.

[0020] Figure 6 for Figure 5 A cross-sectional view along the "AA" direction.

[0021] Figure 7 for Figure 5 A cross-sectional view along the "BB" direction.

[0022] Figure 8 for Figure 7 A three-dimensional schematic diagram of the mid-section view.

[0023] The components include: 1. Carrier plate; 2. Front pressure head; 3. Rear pressure head; 3.1. Rotating shaft; 3.2. Notch; 4. First upright plate; 5. Second upright plate; 5.1. Bearing hole; 6. Telescopic drive mechanism; 6.1. Lead screw motor; 6.2. Second lead screw; 6.3. Lead screw nut; 7. Rotary motor; 8. Cylindrical battery; 8.1. Positive terminal; 8.2. Negative terminal; 9. Slot; 10. Positioning mechanism; 10.1. Telescopic cylinder; 10.2. Locking block; 11. Support wheel; 11.1. Fixed wheel; 11.2. Movable wheel; 12. Bracket; 13. Slider; 14. First lead screw; 15. Nut; 16. Handle. Detailed Implementation

[0024] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0025] The cylindrical battery sealing and welding device according to an embodiment of the present invention will now be described in detail with reference to the accompanying drawings.

[0026] Example 1 This utility model provides a cylindrical battery sealing and welding device, as shown in the figure. It includes a carrier plate 1, on which a clamping mechanism is provided for clamping both ends of a cylindrical battery and driving the clamped cylindrical battery to rotate around its own axis. The clamping mechanism includes two coaxially arranged pressure heads, which are mounted on their respective vertical plates and connected to the carrier plate 1 below. The extension lines of the axes of the two pressure heads are collinear, and the two pressure heads are rotatably engaged with their respective vertical plates. One pressure head is driven by a motor as the active pressure head, and the other pressure head is the driven pressure head. The improvement of this embodiment is that the vertical plate corresponding to the driven pressure head is provided with a positioning mechanism 10 for limiting the rotation position of the driven pressure head. The positioning mechanism 10 ensures that when the driven pressure head covers the negative electrode cover of the cylindrical battery at the end of the cylindrical battery casing, the orientation of the negative electrode post on the negative electrode cover is consistent with the orientation of the positive electrode post on the other end.

[0027] Example 2 Based on the preferred embodiment of the above, the carrier plate 1 is provided with a first upright plate 4 and a second upright plate 5 spaced apart along the length direction. The lower end of the first upright plate 4 is fixedly connected to the carrier plate 1, and the lower end of the second upright plate 5 is slidably engaged with the carrier plate 1 along the length direction. A telescopic drive mechanism 6 for driving the second upright plate 5 to slide along the length direction is provided below the carrier plate 1. A front pressure head 2 is provided at the upper end of the first upright plate 4, and a rear pressure head 3 is provided at the upper end of the second upright plate 5. The two pressure heads are arranged horizontally along the length direction, and the extension lines of the axes of the two pressure heads are collinear. The two pressure heads are rotatably engaged with their respective upright plates. A rotary motor 7 for driving the front pressure head 2 to rotate is provided on the first upright plate 4. The front pressure head 2 and the rear pressure head 3 are respectively provided with slots 9 that match the positive and negative terminals 8.2 on the end of the cylindrical battery 8. In this embodiment, the casing of the cylindrical battery 8 with the positive terminal is placed between two upright plates, and the positive terminal is engaged in the slot 9 of the front pressure head 2. The rotating motor 7 can drive the orientation of the slot 9, thereby keeping the positive terminal vertically upward. Then, the negative terminal cover plate with the negative terminal is placed on the negative terminal end of the cylindrical battery 8. At the same time, the telescopic drive mechanism 6 can drive the rear pressure head 3 to press the negative terminal cover plate. During this process, the positioning mechanism 10 can restrict the circumferential position of the rear pressure head 3, thus ensuring that the slot 9 on the rear pressure head 3 also remains vertically upward, thereby making the negative terminal engaged in the slot 9 of the rear pressure head 3 also vertically upward. Finally, after the cylindrical battery is rotated and welded, the orientation of its positive and negative terminals is consistent, which is beneficial for subsequent processing steps.

[0028] Preferably, in this embodiment, the rotational engagement between the two pressure heads, namely the front pressure head 2 and the rear pressure head 3, and their respective corresponding upright plates can be achieved by having bearing holes respectively opened at corresponding positions on the first upright plate 4 and the second upright plate 5. Each bearing hole is fitted with a bearing seat, and the front pressure head 2 and the rear pressure head 3 can rotate freely through the bearing seats on their respective upright plates. Of course, in actual production, the cylindrical battery 8 may have a steel shell or an aluminum shell. To improve the versatility of the sealing device in this embodiment, the pressure head and its corresponding upright plate are preferably detachable. It should be understood that the detachable arrangement of the cylindrical pressure head and the upright plate during rotational engagement is a conventional installation method for shaft components in the mechanical field; therefore, this method will not be elaborated upon in this embodiment.

[0029] Furthermore, the rotating motor 7 is preferably a servo motor.

[0030] Example 3 Based on one preferred example of the positioning mechanism 10 in the above embodiments: the positioning mechanism 10 includes a telescopic cylinder 10.1 located below the rear pressure head 3 and fixed on the second vertical plate 5. The telescopic cylinder 10.1 is vertically arranged so that the piston rod on the telescopic cylinder 10.1 can move telescopically in the vertical direction. The piston rod of the telescopic cylinder 10.1 is provided with a locking block 10.2. The outer wall of the rear pressure head 3 is provided with a notch 3.2 at the position corresponding to the locking block 10.2, and the shape of the notch 3.2 is set to match the locking block 10.2. Thus, when the rear pressure head 3 drives the locking groove 9 on the rear pressure head 3 to rotate to the vertical position, the notch 3.2 on the outer wall of the rear pressure head 3 is located at the bottom of the rear pressure head 3 and corresponds to the position of the locking block 10.2, so that the telescopic cylinder 10.1 can drive the locking block 10.2 to move upward into the notch 3.2 or downward to the outside of the notch 3.2. In this embodiment, after the previous cylindrical battery 8 has completed sealing welding and unloading, the rear pressure head 3 basically maintains its current position without being subjected to additional force, that is, the slot 9 remains vertically upward. Even if a small amount of vibration is generated due to the operation of the equipment, it will only cause a slight deviation in the rotation angle of the rear pressure head 3. At this time, when the telescopic cylinder 10.1 drives the locking block 10.2 to engage in the notch 3.2, it will drive the locking block 10.2 to fit against the notch 3.2, thereby correcting the deviation in the rotation angle of the rear pressure head 3. After the telescopic drive mechanism 6 retracts, causing the front pressure head 2 and the rear pressure head 3 to move relative to each other to clamp the shell and negative electrode cover of the cylindrical battery 8, the telescopic cylinder 10.1 retracts and resets, thereby allowing the locking block 10.2 to disengage from the notch 3.2. Finally, the rotating motor 7 drives the entire cylindrical battery 8 to rotate while completing the sealing welding. In this embodiment, the rotation angle deviation of the rear pressure head 3 caused by various influencing factors after each welding is automatically corrected by the alignment and bonding between the next clamping block 10.2 and the notch 3.2. This ensures that the sealing device in this embodiment can continuously perform sealing operations and keeps the orientation of the positive and negative terminals at both ends of the welded cylindrical battery basically consistent. Even if there is a certain degree of deviation, the angle deviation can be controlled within the range allowed by the process, ensuring the stability and reliability of the welding process.

[0031] Preferably, such as Figures 1-4As shown, the rear pressure head 3 is provided with a rotating shaft 3.1 at its rear end opposite to the front pressure head 2. One end of the rotating shaft 3.1 is fixedly connected to the rear pressure head 3, and the other end extends along its own axial direction and passes through a bearing hole on the second vertical plate 5. The rotating shaft 3.1 and the bearing hole 5.1 on the second vertical plate 5 are rotatably engaged by a rotating bearing. Further, the end of the rotating shaft 3.1 away from the rear pressure head 3 extends outside the second vertical plate 5, so that a portion of the rotating shaft 3.1 is exposed outside the second vertical plate 5, and a notch 3.2 is formed by inward cutting the portion of the outer wall of the rotating shaft 3.1 that is exposed outside the second vertical plate 5. The telescopic cylinder 10.1 is arranged below the rotating shaft 3.1 and is vertically arranged, so that the locking block 10.2 on the telescopic cylinder 10.1 corresponds to the notch 3.2.

[0032] Furthermore, such as Figure 4 As shown, the locking block 10.2 has a triangular structure that is smaller at the top and larger at the bottom, while the notch 3.2 has an inverted triangular structure that is wider at the outside and narrower at the inside. In this embodiment, the two inclined surfaces on the triangular locking block 10.2 and the inclined surface on the notch 3.2 can play a guiding role. During the process of the locking block 10.2 being inserted into the notch 3.2, the force exerted by the locking block 10.2 on the inner wall of the notch 3.2 can drive the rear pressure head 3, which has shifted in angle, to return to the vertically downward position of the notch 3.2.

[0033] It should be understood that even if the notch 3.2 is subjected to an unexpected force and undergoes a large-angle rotational deviation, making it impossible for the locking block 10.2 to be inserted into the notch 3.2, the rear pressure head 3 can be rotated manually to a position where its notch 3.2 is roughly facing downwards. Then, the locking block 10.2 can be inserted into the notch 3.2, and finally the position of the rear pressure head 3 can be reset to the standard process position.

[0034] Furthermore, the second upright plate 5 is also equipped with an infrared sensor or a Hall sensor for detecting the position of the notch. When the notch 3.2 is subjected to an unexpected force and undergoes a large-angle rotational deviation, the aforementioned sensor sends a detection signal to immediately stop the telescopic cylinder 10.1, preventing the jamming block 10.2 from making hard contact with the part of the rotating shaft 3.1 outside the notch 3.2 and causing damage. Specifically, when using an infrared sensor, a reflective plane can be set at the position corresponding to the notch to reflect the detection light of the infrared sensor, while other positions of the rotating shaft 3.1 are arc-shaped, allowing the detection light to be reflected, thereby determining whether the rotation angle has exceeded the travel limit. Alternatively, a Hall sensor can be used, with a sensing block set on the rotating shaft at the position of the notch, to determine whether the angle at the position of the notch deviates from the allowable angle range.

[0035] Example 4 Based on the second preferred embodiment of the positioning mechanism 10 in the above embodiments: the positioning mechanism 10 aims to make the rotation angle of the rear pressure head 3 controllable, so that the slot 9 on the rear pressure head 3 can remain vertically upward. Thus, during the welding process, the orientation of the slot 9 on the front pressure head 2 and the rear pressure head 3 is consistent, ultimately ensuring that the positive and negative terminals of the cylindrical battery at both ends are aligned after welding. In the above embodiment 3, the telescopic cylinder combined with the locking block has the advantages of simple structure, low cost, and stable and reliable structure. However, there is still a problem that the locking block 10.2 cannot be inserted into the notch 3.2 after the rear pressure head 3 deflects too far, resulting in failure. Therefore, the improvement of this embodiment is that: an auxiliary motor is provided on the second upright plate 5, and a rubber wheel is provided on the output shaft of the auxiliary motor. The rubber wheel and the rear pressure head 3 are connected by frictional transmission. Furthermore, an angle sensor for detecting the rotation angle of the rear pressure head 3 is provided on the second upright plate 5. The angle information of the rear pressure head 3 detected by the angle sensor can be fed back to the auxiliary motor, which drives the rear pressure head 3 to rotate to the required position. The advantage of this embodiment compared to embodiment 3 is that the rear pressure head 3 can be reset to the vertically upward position of the slot 9 by the auxiliary motor, regardless of its rotational position. However, this embodiment requires the addition of an auxiliary motor and an angle sensor, which not only increases the cost but also requires information exchange between the angle sensor and the auxiliary motor, thus increasing the control difficulty and the probability of equipment failure.

[0036] Example 5 In the above embodiment, the position of the cylindrical battery casing to be welded between the two pressure heads needs to ensure that the center line of the casing is collinear with the axis of the two pressure heads. Therefore, in this embodiment, the carrier plate 1 is provided with a supporting component that can support the cylindrical battery 8 and allow the cylindrical battery 8 to rotate freely around its own axis.

[0037] Preferably, the supporting component is a plurality of support wheels 11 disposed on the carrier plate 1 and between the two upright plates, and all the support wheels 11 are configured such that when the cylindrical battery 8 to be processed is placed horizontally on each support wheel 11, the center line of the cylindrical battery 8 is collinear with the axis of the two pressure heads.

[0038] Specifically, the support wheels 11 on the carrier plate 1 are in at least two sets, with each set of support wheels 11 spaced apart along the length direction. Each set of support wheels 11 includes two support wheels 11, and the two support wheels 11 in the same set are arranged along the width direction on both sides of the cylindrical battery 8 to support the cylindrical battery 8, i.e. Figure 7 The two support wheels 11 in the same group shown abut against the lower left and lower right positions on the cross-section of the cylindrical battery 8, respectively, and each support wheel 11 is able to rotate around its own axis. Therefore, each support wheel 11 does not restrict the cylindrical battery 8 from rotating around its own axis.

[0039] Further preferably, the support wheels 11 on the carrier plate 1 are in two sets.

[0040] Based on the preferred method for adjusting the position of the two support wheels 11 within the same group in the above embodiment, see [reference]. Figures 7-8 As shown, the two support wheels 11 in the same group include a fixed wheel 11.1 and a movable wheel 11.2. The fixed wheel 11.1 is fixed to the carrier plate 1 by a transversely arranged bracket 12. Here, "fixed" refers to the fixed position of the fixed wheel 11.1. The fixed wheel 11.1 should be able to rotate around its own axis. The bracket 12 is provided with a slider 13 that slides along the width direction. The movable wheel 11.2 is mounted on the slider 13. The relative position of the movable wheel 11.2 and the slider 13 is fixed, but the movable wheel 11.2 should be able to rotate around its own axis. The bracket 12 is provided with an adjustment mechanism for driving the slider 13 to reciprocate. In this embodiment, the adjustment mechanism can drive the slider 13 and the movable wheel 11.2 on the slider 13 to reciprocate along the width direction, thereby facilitating the adjustment of the position of the movable wheel 11.2. Of course, the adjustment mechanism should be able to lock the current position of the slider 13 after adjustment.

[0041] Based on the preferred embodiment of the above-described adjustment mechanism, the adjustment mechanism includes a first lead screw 14 arranged along the width direction and a nut 15 threadedly driven to the first lead screw 14. The nut 15 is fixed to the slider 13. One end of the first lead screw 14 protrudes outside the bracket 12, and a handle 16 is provided at the exposed end of the first lead screw 14 for rotating the first lead screw 14. Thus, the operator can synchronously change the position of the slider 13 by rotating the handle 16, thereby adjusting the position of the movable wheel 11.2 on the slider 13. Once the position of the movable wheel 11.2 is adjusted to the correct position, it is only necessary to lock the handle 16 in its current position. It should be understood that for various types of handles, locking or unlocking the handle using a locking device is a conventional basic function, and such locking devices are also commercially available products; therefore, they will not be described in detail in this embodiment.

[0042] Example 6 In a preferred embodiment of the above, both the front pressure head 2 and the rear pressure head 3 are made of copper or copper-containing metals, and are also known in the industry as copper pressure heads.

[0043] Example 7 like Figure 3As shown, the telescopic drive mechanism 6 in the above embodiment includes a lead screw motor 6.1, a second lead screw 6.2, and a lead screw nut 6.3. The lead screw motor 6.1 is arranged below the carrier plate 1 and is fixedly connected to the carrier plate 1. The second lead screw 6.2 is arranged horizontally along the length direction of the carrier plate 1, and the second lead screw 6.2 is mounted below the carrier plate 1 through a bearing seat and can rotate around its own axis. The left end of the second lead screw 6.2 is connected to the lead screw motor 6.1 or through a coupling. The lead screw nut 6.3 is sleeved on the second lead screw 6.2 and threadedly driven by the second lead screw 6.2. The bottom of the second vertical plate 5 is fixedly connected to the lead screw nut 6.3. Thus, the lead screw motor 6.1 can drive the second lead screw 6.2 to rotate, thereby driving the lead screw nut 6.3 and the second vertical plate 5 on the lead screw nut 6.3 to translate along the length direction.

[0044] It should be noted that in the description of this utility model, the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0045] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0046] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0047] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0048] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0049] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

[0050] For those skilled in the art, various changes and modifications will undoubtedly be apparent after reading the above description. Therefore, the appended claims should be considered as covering all changes and modifications that encompass the true intent and scope of this utility model. Any and all equivalent scope and content within the scope of the claims should be considered as still falling within the intent and scope of this utility model.

Claims

1. A cylindrical battery sealing and welding device, comprising a carrier plate (1), a front pressure head (2) and a rear pressure head (3) arranged on the carrier plate (1) for clamping both ends of a cylindrical battery (8), wherein the front pressure head (2) is mounted on a first upright plate (4) fixed to the carrier plate (1), and the rear pressure head (3) is mounted on a second upright plate (5) that slides with the carrier plate (1), wherein a telescopic drive mechanism (6) for driving the second upright plate (5) is provided below the carrier plate (1), characterized in that: The front pressure head (2) and the rear pressure head (3) are rotatably fitted on their respective first vertical plate (4) and second vertical plate (5). The first vertical plate (4) is provided with a rotating motor (7) for driving the front pressure head (2) to rotate. The front pressure head (2) and the rear pressure head (3) are respectively provided with slots (9) that match the positive and negative terminals on the end of the cylindrical battery (8). The second vertical plate (5) is provided with a positioning mechanism (10) for limiting the circumferential rotation position of the rear pressure head (3). The carrier plate (1) is provided with a plurality of support wheels (11) that abut against the outer side wall of the cylindrical battery (8).

2. The cylindrical battery sealing and welding device according to claim 1, characterized in that: The positioning mechanism (10) includes a telescopic cylinder (10.1) located below the rear pressure head (3) and fixed on the second vertical plate (5). The piston rod of the telescopic cylinder (10.1) is provided with a locking block (10.2). The outer side wall of the rear pressure head (3) has a notch (3.2) that matches the locking block (10.2). When the rear pressure head (3) rotates to the position of the locking groove (9) on the rear pressure head (3) in a vertical state, the notch (3.2) on the outer side wall of the rear pressure head (3) is located at the bottom of the rear pressure head (3) and corresponds to the position of the locking block (10.2), so that the telescopic cylinder (10.1) can drive the locking block (10.2) to move upward into the notch (3.2) or downward to the outside of the notch (3.2).

3. The cylindrical battery sealing and welding device according to claim 2, characterized in that: The rear pressure head (3) is provided with a rotating shaft (3.1), which is rotatably engaged with the bearing hole (5.1) on the second vertical plate (5) and the end of the rotating shaft (3.1) extends away from the rear pressure head (3) to the outside of the second vertical plate (5). The notch (3.2) is located on the outer wall of the rotating shaft (3.1), and the telescopic cylinder (10.1) is arranged below the rotating shaft (3.1) and corresponds to the notch (3.2).

4. The cylindrical battery sealing and welding device according to claim 3, characterized in that: The card block (10.2) has a triangular structure that is smaller at the top and larger at the bottom.

5. The cylindrical battery sealing and welding device according to claim 1, characterized in that: The support wheels (11) on the carrier plate (1) are at least two sets, each set of support wheels (11) includes two support wheels (11). The two support wheels (11) in the same set are arranged on both sides of the cylindrical battery (8) along the width direction to support the cylindrical battery (8) and enable the cylindrical battery (8) to rotate around its own axis.

6. The cylindrical battery sealing and welding device according to claim 5, characterized in that: The support wheels (11) on the carrier plate (1) are in two sets.

7. The cylindrical battery sealing and welding device according to claim 5, characterized in that: The two support wheels (11) in the same group include a fixed wheel (11.1) and a movable wheel (11.2). The fixed wheel (11.1) is fixed to the carrier plate (1) by a bracket (12). The bracket (12) is provided with a slider (13) that slides along the width direction. The movable wheel (11.2) is mounted on the slider (13). The bracket (12) is provided with an adjustment mechanism for driving the slider (13) to reciprocate.

8. The cylindrical battery sealing and welding device according to claim 7, characterized in that: The adjustment mechanism includes a first lead screw (14) arranged along the width direction and a nut (15) threadedly driven by the first lead screw (14). The nut (15) is fixed to the slider (13). One end of the first lead screw (14) is exposed outside the bracket (12), and the exposed end of the first lead screw (14) is provided with a handle (16) for driving the first lead screw (14) to rotate.

9. The cylindrical battery sealing and welding apparatus according to any one of claims 1-8, characterized in that: Both the front pressure head (2) and the rear pressure head (3) are made of copper or copper-containing metal.

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