Core combining device

Abstract

The utility model provides a core combining device which comprises a core combining assembly capable of being folded or unfolded, the core combining assembly is used for combining cores of core combining units arranged on the core combining assembly, the core combining device further comprises a shaping assembly, and the shaping assembly is provided with a plurality of shaping ends. The projections of the plurality of shaping ends on the core combining assembly are distributed on the two sides of the folding central surface of the core combining assembly, and the tab of any core combining unit correspondingly abuts against the shaping end so as to perform arc-shaped shaping on the plurality of tabs of the core combining unit in the core combining process of the core combining unit. By adopting the technical scheme provided by the utility model, the shaping component is used for shaping the tabs in the core combining process to change the shapes of the tabs, so that the stress distribution of the tabs in the core combining process is further changed, the stress concentration of the tabs at the boundary surfaces of the tabs and ceramics is avoided, the stress can be uniformly released on the tabs (aluminum foils), and the quality of the tabs is improved. And the risk of tab tearing can be effectively reduced, so that the production yield and the overall performance of the battery are improved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and more specifically, to a battery core assembly device. Background Technology

[0002] In the manufacturing process of lithium-ion batteries, tab tearing has always been one of the key factors affecting battery performance and production yield. As the bridge connecting the battery's internal structure and external circuitry, the integrity and reliability of the tabs directly affect the battery's internal resistance, capacity, and self-discharge rate. When tabs tear, the battery's internal resistance may increase significantly, leading to a decrease in battery capacity and an increase in self-discharge rate, thereby affecting battery pack shipments and overall performance.

[0003] The existing problem of tab tearing mainly occurs in three stages: ultrasonic welding of the tab-adapter plate, the core-coating process, and the installation of the mating core into the shell. To solve these problems, the industry has generally adopted methods such as optimizing the core-coating station structure, improving tooling fixtures, and adjusting the shell-installation process. These measures have reduced the tab tearing problem of traditional electrode sheets without ceramic edges to a certain extent.

[0004] However, with the development of lithium-ion battery technology, in order to improve the stability and reliability of batteries during long-term service, ceramic edges (such as alumina or boehmite) have become commonly coated on the positive electrode to enhance the insulation between the electrodes. While this improvement has enhanced battery performance, it has also introduced new problems—the tabs are prone to tearing at the interface where they contact the ceramic edge, resulting in a defect rate of up to 10%. 3 The tearing is at the ppm level, and the tearing mainly occurs at the base of the tab, that is, at the intersection of the tab and the ceramic edge.

[0005] The introduction of ceramic edges alters the material properties of the electrode. The originally homogeneous electrode becomes composed of two heterogeneous phases, with the ceramic edges exhibiting a much higher hardness than the tab material (such as aluminum foil). During core assembly and casing insertion, when the tab is subjected to external forces, stress concentration easily occurs at the interface with the ceramic edge, leading to tab tearing. Especially when the tab undergoes S-shaped buckling, the increased overall deformation further exacerbates the stress concentration at the interface, significantly increasing the risk of tab tearing. Although solutions exist for tab tearing in traditional electrodes, these solutions have not effectively addressed the tab tearing problem in electrodes with ceramic edges, particularly the stress concentration at the tab-ceramic interface. Utility Model Content

[0006] This invention provides a core-combining device to solve the problem that the tabs are prone to tearing during the core-combining process, such as S-shaped bending.

[0007] To address the aforementioned problems, this utility model provides a core-combining device. The core-combining device includes a foldable or unfoldable core-combining assembly, which is used to combine core-combining units disposed on the core-combining assembly. The core-combining device also includes a shaping assembly, which has multiple shaping ends. The projections of the multiple shaping ends on the core-combining assembly are distributed on both sides of the folded center surface of the core-combining assembly. Each core-combining unit has a corresponding shaping end abutting at its tab, so as to perform arc-shaped shaping on the multiple tabs of the core-combining unit during the core-combining process.

[0008] Furthermore, the multiple tabs of the core unit are symmetrically distributed on both sides of the folded center surface, and the multiple tabs on any side are distributed parallel to the folded center surface. The multiple shaping ends include a first shaping end and a second shaping end. The first shaping end and the second shaping end are symmetrically arranged on both sides of the folded center surface. The first shaping end abuts against the multiple tabs in the core unit located on one side of the folded center surface, and the second shaping end abuts against the multiple tabs in the core unit located on the other side of the folded center surface.

[0009] Furthermore, the core-combining assembly has a core-combining station for placing the core-combining unit, and the shaping assembly includes a first shaping cylinder and a second shaping cylinder arranged opposite to each other. The first shaping cylinder and the second shaping cylinder are parallel to the folding center plane and the surface of the core-combining station. The first shaping cylinder and the second shaping cylinder are symmetrically arranged on both sides of the folding center plane. The portion of the first shaping cylinder that abuts against the electrode tab forms a first shaping end, and the portion of the second shaping cylinder that abuts against the electrode tab forms a second shaping end.

[0010] Furthermore, the first and second shaping cylinders are made of flexible materials.

[0011] Furthermore, both the first shaping cylinder and the second shaping cylinder can be rotatably configured.

[0012] Furthermore, the shaping assembly also includes an adjustment assembly, which is connected to both the first shaping cylinder and the second shaping cylinder to adjust the relative positions of the first shaping cylinder and the second shaping cylinder, and / or to adjust the positions of the first shaping cylinder and the second shaping cylinder relative to the core-combining assembly.

[0013] Furthermore, the adjustment assembly includes a support assembly, a drive component, a drive roller, and a transmission assembly. The drive component and the drive roller are driven together. The drive roller is connected to the first shaping cylinder and the second shaping cylinder through the transmission assembly. The drive component is mounted on the support assembly. The support assembly is used to adjust the position of the adjustment assembly relative to the core-forming assembly. The drive roller and the transmission assembly are driven together to adjust the relative position of the first shaping cylinder and the second shaping cylinder.

[0014] Furthermore, the driving component is a servo motor, and the driving roller is disposed between the first shaping cylinder and the second shaping cylinder and parallel to the first shaping cylinder. The driving roller includes a housing and a roller shaft disposed inside the driving roller. The outer circumference of the roller shaft has a first external thread and a second external thread with opposite directions of rotation along its axial direction. The transmission assembly includes a first adapter rod and a second adapter rod respectively connected to the first shaping cylinder and the second shaping cylinder. The side of the first adapter rod opposite to the first shaping cylinder has a first rack that passes through the bottom of the housing and meshes with the first external thread. The side of the second adapter rod opposite to the second shaping cylinder has a second rack that passes through the bottom of the housing and meshes with the second external thread. The servo motor is driven by the roller shaft to drive the first rack and the second rack to move closer to or further away from each other.

[0015] Furthermore, the shaping component includes a shaping member, which has multiple protruding or retractable abutment protrusions on the side of the shaping member near the core unit. The abutment protrusions abut against the electrode tabs and form shaping ends. The multiple abutment protrusions are distributed on opposite sides of the shaping member on the side of the shaping member near the core unit.

[0016] Furthermore, the core-combining unit includes a first and a second mating battery symmetrically arranged on both sides of the folding center plane. Multiple tabs of the first mating battery are connected to multiple tabs of the second mating battery through multiple connecting plates. The center lines of the multiple connecting plates are all located on the folding center plane. When the first and second mating batteries are combined, the tabs of the first mating battery, the connecting plates, and the tabs of the second mating battery connected in sequence are generally in a C-shaped bend.

[0017] The present invention provides a core-combining device, which includes a foldable or unfoldable core-combining assembly for core-combining core units disposed on the core-combining assembly. The core-combining device also includes a shaping assembly with multiple shaping ends. The projections of the multiple shaping ends on the core-combining assembly are distributed on both sides of the folded center surface of the core-combining assembly. Each core unit has a corresponding shaping end abutting at its tab, so as to perform arc-shaped shaping on the multiple tabs of the core unit during the core-combining process.

[0018] This solution uses a shaping component to reshape the tabs during the core-gathering process, changing their shape and thus altering their stress distribution. This avoids stress concentration at the interface between the tabs and the ceramic, allowing stress to be evenly released onto the tabs (aluminum foil). This effectively reduces the risk of tab tearing, thereby improving battery production yield and overall performance. Attached Figure Description

[0019] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments and descriptions of this utility model are used to explain this utility model and do not constitute an undue limitation thereof. In the drawings:

[0020] Figure 1 A schematic diagram of the application structure of the shaping component of the core-combining device provided in an embodiment of the present invention is shown;

[0021] Figure 2 It shows Figure 1 A front view of the core-combining device;

[0022] Figure 3 It shows Figure 1 A three-dimensional view of the application of the shaping components of the core-combining device;

[0023] Figure 4 A schematic diagram of the core-combining unit after core-combining with the assistance of the core-combining device provided in this embodiment is shown.

[0024] The above figures include the following reference numerals:

[0025] 10. Shaping assembly; 11. First shaping cylinder; 12. Second shaping cylinder; 13. Adjustment assembly;

[0026] 20. Core unit; 21. Electrode; 22. First mating cell; 23. Second mating cell; 24. Connecting plate;

[0027] 301. Fold the center plane. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0029] like Figures 1 to 4 As shown, an embodiment of this utility model provides a core-combining device. The core-combining device includes a foldable or unfoldable core-combining assembly. The core-combining assembly is used to combine core-combining units 20 disposed on the core-combining assembly. The core-combining device also includes a shaping assembly 10, which has multiple shaping ends. The projections of the multiple shaping ends on the core-combining assembly are distributed on both sides of the folding center surface 301 of the core-combining assembly. Each tab 21 of any core-combining unit 20 is correspondingly abutted by a shaping end to perform arc-shaped shaping of the multiple tabs 21 of the core-combining unit 20 during the core-combining process.

[0030] In this embodiment, the shaping component 10 shapes the tab 21 during the core-gathering process, thereby changing the shape of the tab 21 and thus changing its stress distribution during the core-gathering process. This avoids stress concentration at the interface between the tab 21 and the ceramic, allowing the stress to be evenly released on the tab 21 (aluminum foil). This effectively reduces the risk of the tab 21 tearing, thereby improving the production yield and overall performance of the battery.

[0031] The core-combining unit 20 includes a first mating cell 22 and a second mating cell 23 symmetrically arranged on both sides of the folding center plane 301. Multiple tabs 21 of the first mating cell 22 are connected one-to-one with multiple tabs 21 of the second mating cell 23 via multiple connecting plates 24. The centerlines of the multiple connecting plates 24 are all located on the folding center plane 301. When the first mating cell 22 and the second mating cell 23 are combined, the tabs 21 of the first mating cell 22, the connecting plates 24, and the tabs 21 of the second mating cell 23, connected sequentially, form a C-shaped bend. By making the tabs 21 exhibit a C-shaped bend during the core-combining process, stress concentration at the ceramic interface, such as S-shaped bends, can be effectively avoided, preventing the tabs 21 from tearing. This improves the battery's production yield and overall performance, and reduces the risk of increased internal resistance and decreased capacity due to tab tearing.

[0032] like Figures 1 to 3 As shown, multiple tabs 21 of the core-combining unit 20 are symmetrically distributed on both sides of the folded center surface 301, and the multiple tabs 21 on either side are distributed parallel to the folded center surface 301. Multiple shaping ends include a first shaping end and a second shaping end, which are symmetrically arranged on both sides of the folded center surface 301. The first shaping end abuts against the multiple tabs 21 located on one side of the folded center surface 301 in the core-combining unit 20, and the second shaping end abuts against the multiple tabs 21 located on the other side of the folded center surface 301 in the core-combining unit 20. This arrangement, through the symmetrical and synchronous shaping of the multiple tabs 21 on both sides of the folded center surface 301 by the first and second shaping ends, improves the accuracy and consistency of shaping the multiple tabs 21 during the core-combining process, further ensuring the uniform distribution of stress on the multiple tabs 21 during the core-combining process, reducing the risk of tab tearing, and significantly improving the manufacturing quality and production efficiency of the battery.

[0033] Specifically, the core-combining assembly has a core-combining station for placing the core-combining unit 20. The shaping assembly 10 includes a first shaping cylinder 11 and a second shaping cylinder 12 arranged opposite to each other. The first shaping cylinder 11 and the second shaping cylinder 12 are parallel to the folding center plane 301 and the surface of the core-combining station. The first shaping cylinder 11 and the second shaping cylinder 12 are symmetrically arranged on both sides of the folding center plane 301. The portion of the first shaping cylinder 11 that abuts against the tab 21 forms a first shaping end, and the portion of the second shaping cylinder 12 that abuts against the tab 21 forms a second shaping end.

[0034] In this embodiment, multiple tabs 21 are symmetrically arranged at the same height before core bonding. The first shaping cylinder 11 and the second shaping cylinder 12 are symmetrically arranged and synchronously bond the multiple tabs 21 to ensure the consistency of core bonding and the reliability of shaping the multiple tabs 21. The outer periphery of the first shaping cylinder 11 abuts against the multiple tabs 21 located on one side of the folding center surface 301 in the core bonding unit 20 to form multiple first shaping ends. The outer periphery of the second shaping cylinder 12 abuts against the multiple tabs 21 located on the other side of the folding center surface 301 in the core bonding unit 20 to form multiple second shaping ends. It can be understood that in this embodiment, the multiple first shaping ends are distributed at intervals along the axial direction of the first shaping cylinder 11 on the outer periphery of the first shaping cylinder 11, and the multiple second shaping ends are distributed at intervals along the axial direction of the second shaping cylinder 12 on the outer periphery of the second shaping cylinder 12. With this configuration, the outer periphery of the first shaping cylinder 11 and the second shaping cylinder 12 can directly abut against the tab 21 to form the shaping end. There is no need to set other structures corresponding to the position of the tab 21 as the shaping end. Moreover, a single shaping cylinder can form multiple shaping ends on the same side, which is beneficial to improving the convenience of processing and shaping efficiency.

[0035] Preferably, the first shaping cylinder 11 and the second shaping cylinder 12 are made of flexible materials. The use of flexible materials ensures that the tab 21 experiences uniform pressure during the shaping process, avoiding localized stress concentration. This makes the shaping process of the tab 21 gentler, reducing the possibility of damage to the tab 21, improving battery manufacturing quality and production efficiency, and lowering equipment maintenance costs. For example, the materials of the first shaping cylinder 11 and the second shaping cylinder 12 include, but are not limited to, soft materials such as foam.

[0036] Preferably, both the first shaping cylinder 11 and the second shaping cylinder 12 are rotatably configured. It is understood that the position of the first shaping end on the first shaping cylinder 11 will be adjusted according to the rotation of the first shaping cylinder 11, and the same applies to the second shaping end and the second shaping cylinder 12. This configuration further relieves the stress on the tab 21 during the shaping process, avoiding tearing of the tab 21 caused by hard contact friction between the shaping roller and the tab 21, making the tab 21 move more smoothly during the shaping process and reducing the risk of tab 21 tearing.

[0037] It is understood that the shaping assembly 10 also includes an adjustment assembly 13, which is connected to both the first shaping cylinder 11 and the second shaping cylinder 12 to adjust the relative positions of the first shaping cylinder 11 and the second shaping cylinder 12, and / or adjust the positions of the first shaping cylinder 11 and the second shaping cylinder 12 relative to the core-forming assembly. This configuration allows for precise control of the shaping position of the tab 21 by adjusting the positions of the first shaping cylinder 11 and the second shaping cylinder 12 relative to the tab 21, enabling operators to adjust the shaping position of the tab 21 relative to the first shaping cylinder 11 and the second shaping cylinder 12 according to actual conditions, ensuring uniform stress distribution of the tab 21 during the core-forming process, improving the adjustability and consistency of the shaping accuracy of the tab 21, and reducing the risk of tearing of the tab 21.

[0038] Preferably, the adjusting component 13 includes a support component, a driving component, a driving roller, and a transmission component. The driving component and the driving roller are drivenly connected. The driving roller is connected to the first shaping cylinder 11 and the second shaping cylinder 12 through the transmission component. The driving component is disposed on the support component. The support component is used to adjust the position of the adjusting component 13 relative to the core-forming component. The driving roller and the transmission component are drivenly engaged to adjust the relative position of the first shaping cylinder 11 and the second shaping cylinder 12.

[0039] In this embodiment, as Figure 2 As shown, the positions of the first shaping cylinder 11 and the second shaping cylinder 12 in the vertical direction can be adjusted by the support assembly. Figure 1 and Figure 2 As shown, the relative positions of the first shaping cylinder 11 and the second shaping cylinder 12 in the horizontal direction can be adjusted by the driving component, the driving roller, and the transmission assembly, thereby achieving the abutment and shaping adjustment of the first shaping cylinder 11 and the second shaping cylinder 12 at different positions relative to the tab 21. This configuration, where the positions of the first shaping cylinder 11 and the second shaping cylinder 12 in different directions are adjusted by the support assembly and the driving component respectively, avoids the difficulty in controlling the adjustment accuracy when using a single drive for multi-degree-of-freedom motion, thus improving the convenience and accuracy of the adjustment.

[0040] It is understood that in other embodiments not shown in the figures, the adjusting component 13 can simultaneously adjust the relative positions of the first shaping cylinder 11 and the second shaping cylinder 12 as well as the positions of the first shaping cylinder 11 and the second shaping cylinder 12 relative to the core-forming component.

[0041] Preferably, the driving component is a servo motor. The driving roller is disposed between the first shaping cylinder 11 and the second shaping cylinder 12 and parallel to the first shaping cylinder 11. The driving roller includes a housing and a roller shaft disposed inside the driving roller. The outer circumference of the roller shaft has a first external thread and a second external thread with opposite directions of rotation along its axial direction. The transmission assembly includes a first adapter rod and a second adapter rod respectively connected to the first shaping cylinder 11 and the second shaping cylinder 12. The side of the first adapter rod opposite to the first shaping cylinder 11 has a first rack that passes through the bottom of the housing and meshes with the first external thread. The side of the second adapter rod opposite to the second shaping cylinder 12 has a second rack that passes through the bottom of the housing and meshes with the second external thread. The servo motor is driven by the roller shaft to drive the first rack and the second rack to move closer to or further away from each other.

[0042] In this embodiment, both the first and second adapter rods are L-shaped rods. The first and second racks are located on the segments of the L-shaped rods whose axes are perpendicular to the axes of the first shaping cylinder 11 and the second shaping cylinder 12. When it is necessary to adjust the relative position between the first shaping cylinder 11 and the second shaping cylinder 12, the operator can turn on the servo motor. The servo motor rotates and drives the roller shaft to rotate. Since the first rack meshes with the first external thread, the second rack meshes with the second external thread, and the first and second external threads rotate in opposite directions, the first and second racks will move closer or further apart under the action of the rotation of the roller shaft and the meshing (preferably, the shaping component 10 is first adjusted to a designated position, and after the core-joining component performs a certain angle of core-joining on the core-joining unit 20, the first shaping cylinder 11 and the second shaping cylinder 12 of the shaping component 10 can move slightly in the opposite direction of core-joining, or in other words, in a direction away from each other, to ensure the shaping effect. After the shaping is completed, the shaping component 10 is reset), thereby driving the first shaping cylinder 11 and the second shaping cylinder 12 to move closer or further apart. This configuration, through precise control of the servo motor, ensures that the relative positions of the first shaping cylinder 11 and the second shaping cylinder 12 are adjusted to the optimal state, avoiding damage to the tab 21 during the shaping process and guaranteeing adjustment and shaping accuracy.

[0043] Preferably, the first shaping cylinder 11 can be adjusted by multiple sets of transmission components, and the second shaping cylinder 12 can be adjusted in the same way. This helps to ensure the reliability and stability of the relative movement of the first shaping cylinder 11 and the second shaping cylinder 12, and avoids situations where the first shaping cylinder 11 and the second shaping cylinder 12 are prone to deflection during the adjustment process, which may lead to inconsistent shaping positions of multiple tabs 21.

[0044] Furthermore, a limiting component can be set to provide auxiliary support for the first and second adapter rods, so as to ensure the reliability of the meshing between the rack and the external thread, as well as the reliability and stability of the rack movement, thereby ensuring the reliability of the relative position adjustment of the first shaping cylinder 11 and the second shaping cylinder 12.

[0045] It is understood that the structure of the shaping component 10 for shaping the tab 21 includes, but is not limited to, a pair of first shaping cylinders 11 and second shaping cylinders 12. That is, the number of sets of first shaping cylinders 11 and second shaping cylinders 12 can be adaptively adjusted according to actual conditions. The composition and transmission method of the shaping component 10 can also be adaptively adjusted according to actual conditions. That is, the structure for shaping the tab 21 can be other structures. For example, in another embodiment of this utility model (not shown), the shaping component 10 includes a shaping member. The shaping member has multiple protruding or retractable abutment protrusions on the side near the core unit 20. The abutment protrusions abut against the tab 21 and form a shaping end. The multiple abutment protrusions are distributed on opposite sides of the shaping member on the side near the core unit 20. In this embodiment, the shaping member can be a block structure with a bowl-shaped lower cross section. It has multiple sets of protrusions symmetrically arranged on both sides of the folding center surface 301. Each set of protrusions corresponds to the number of tabs 21 located on one side of the folding center surface 301 and has multiple abutment protrusions. With this configuration, when the shaping position of the tab 21 needs to be adjusted, it is only necessary to adjust the height of the shaping component and extend the corresponding abutment protrusion at the desired shaping position. This configuration allows the shaping component to adapt to tabs 21 of different sizes and shapes, enhancing the versatility and flexibility of the shaping component 10.

[0046] In summary, this utility model provides a core-combining device, which modifies the original core-combining assembly by adding a shaping component 10 containing a first shaping cylinder 11 and a second shaping cylinder 12. After the core-combining unit 20 is placed on the core-combining station of the core-combining component, the two shaping cylinders (the first shaping cylinder 11 and the second shaping cylinder 12) are advanced to their respective positions by the adjusting component 13 (including a servo motor, etc.) and then core-combining is performed. It can be understood that the optimal position of the shaping cylinder is determined by the redundant length of the tab 21 during the core-combining process (the existence of the redundant length of the tab 21 ensures that the soft contact near the core will not cause the tab to tear) and the size of the shaping cylinder. Furthermore, the two shaping cylinders make soft contact with the tab 21 (for example, by covering the metal roller or the rigid plastic roller with foam) to reduce the possibility of pressure damage. At the same time, the fixed-axis movement of the shaping cylinder can also release some of the stress when the roller contacts the tab, further reducing the risk of tab tearing. On the other hand, this utility model is a modification based on the original core-combining component. The modification is convenient. It only requires adding a shaping component 10 and rewriting the PLC control program of the core-combining mechanism to realize automatic shaping control in the core-combining process. Moreover, the components and operating logic are simple and easy to maintain.

[0047] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0048] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0049] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0050] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0051] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0052] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A splicing device, comprising a foldable or unfoldable splicing assembly for splicing splicing units (20) arranged on the splicing assembly, characterized in that, The core combining device further comprises a shaping assembly (10) having a plurality of shaping ends, projections of the plurality of shaping ends on the core combining assembly are distributed on both sides of the core combining assembly folding center plane (301), and each of the tabs (21) of any one of the core combining units (20) corresponds to abut the shaping end to arc shape the plurality of tabs (21) of the core combining unit (20) during the core combining process.

2. The splicing device of claim 1, wherein The plurality of tabs (21) of the core combining unit (20) are symmetrically distributed on both sides of the folding center plane (301), and the plurality of tabs (21) on each side are parallel to the folding center plane (301), the plurality of shaping ends include first shaping ends and second shaping ends, the first shaping ends and the second shaping ends are symmetrically arranged on both sides of the folding center plane (301), the first shaping ends abut the plurality of tabs (21) of the core combining unit (20) located on one side of the folding center plane (301), and the second shaping ends abut the plurality of tabs (21) of the core combining unit (20) located on the other side of the folding center plane (301).

3. The splicing device of claim 2, wherein The core combining assembly has a core combining station for placing the core combining units (20), the shaping assembly (10) includes oppositely arranged first shaping cylinders (11) and second shaping cylinders (12), the first shaping cylinders (11) and the second shaping cylinders (12) are parallel to the folding center plane (301) and the surface of the core combining station, the first shaping cylinders (11) and the second shaping cylinders (12) are symmetrically arranged on both sides of the folding center plane (301), the portion of the first shaping cylinders (11) abutting the tabs (21) forms the first shaping ends, and the portion of the second shaping cylinders (12) abutting the tabs (21) forms the second shaping ends.

4. The splicing device of claim 3, wherein The first shaping cylinders (11) and the second shaping cylinders (12) are made of flexible material.

5. The splicing device of claim 3, wherein The first shaping cylinders (11) and the second shaping cylinders (12) are rotatably arranged.

6. The splicing device of claim 3, wherein The shaping assembly (10) further comprises an adjusting assembly (13) connected with the first shaping cylinders (11) and the second shaping cylinders (12) to adjust the relative positions of the first shaping cylinders (11) and the second shaping cylinders (12), and / or adjust the positions of the first shaping cylinders (11) and the second shaping cylinders (12) relative to the core combining assembly.

7. The splicing device of claim 6, wherein The adjusting assembly (13) comprises a supporting assembly, a driving member, a driving roller and a transmission assembly, the driving member and the driving roller are drivingly connected, the driving roller is connected with the first shaping cylinders (11) and the second shaping cylinders (12) through the transmission assembly, the driving member is arranged on the supporting assembly, the supporting assembly is used to adjust the position of the adjusting assembly (13) relative to the core combining assembly, and the driving roller and the transmission assembly are transmissionally matched to adjust the relative positions of the first shaping cylinders (11) and the second shaping cylinders (12).

8. The splicing device of claim 7, wherein The driving member is a servo motor, the driving roller is arranged between the first shaping cylinder (11) and the second shaping cylinder (12) and parallel to the first shaping cylinder (11), the driving roller comprises a shell and a roller shaft arranged in the driving roller, the outer periphery of the roller shaft has a first outer thread and a second outer thread with opposite rotation directions along the axial direction thereof, the transmission assembly comprises a first adapter rod and a second adapter rod connected with the first shaping cylinder (11) and the second shaping cylinder (12) respectively, the first adapter rod has a first rack penetrating through the bottom of the shell and engaged with the first outer thread on the side away from the first shaping cylinder (11), the second adapter rod has a second rack penetrating through the bottom of the shell and engaged with the second outer thread on the side away from the second shaping cylinder (12), and the servo motor is drivingly connected with the roller shaft to drive the first rack and the second rack to move close to or away from each other.

9. The splicing device of claim 1, wherein The shaping assembly (10) comprises a shaping member, the shaping member has a plurality of protrudable or retractable abutting protrusions on the side close to the core combining unit (20), the abutting protrusions abut against the tabs (21) and form the shaping end, and the abutting protrusions are distributed on opposite sides of the side of the shaping member close to the core combining unit (20).

10. The splicing device of claim 1, wherein The core combining unit (20) comprises a first matched battery cell (22) and a second matched battery cell (23) symmetrically arranged on both sides of the folding center surface (301), a plurality of tabs (21) of the first matched battery cell (22) are connected with a plurality of tabs (21) of the second matched battery cell (23) one by one through a plurality of connecting plates (24), the center lines of the connecting plates (24) are located on the folding center surface (301), and in the case that the first matched battery cell (22) and the second matched battery cell (23) are combined, the tabs (21) of the first matched battery cell (22), the connecting plates (24) and the tabs (21) of the second matched battery cell (23) connected in sequence are integrally C-shaped curved.

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