Coaxial integrated lamination device and lamination machine

Abstract

The utility model discloses a coaxial integrated lamination device and a lamination machine, and relates to the technical field of battery core lamination production equipment. The coaxial integrated lamination device comprises a machine table, a driving mechanism, a lamination mechanism and a discharging mechanism. The machine table is provided with a lamination table; the driving mechanism is arranged on the machine table and provided with a guide rail. The lamination mechanism is arranged on the guide rail and is used for transporting the positive plate and the negative plate to the lamination table; and the discharging mechanism is arranged on the guide rail and is used for discharging the battery cell structure from the lamination table. According to the technical scheme provided by the utility model, the deviation of the diaphragm is avoided, so that the packaging effect of the battery cell is ensured.

Description

Technical Field

[0001] This utility model relates to the technical field of battery cell stacking production equipment, and in particular to a coaxial integrated stacking device and stacking machine. Background Technology

[0002] In the lithium battery manufacturing process, the cell stacking process uses a separator to separate the positive and negative electrode plates, which are then stacked alternately to form the cell structure. The separator not only separates the positive and negative electrode plates to prevent short circuits but also allows lithium ions to pass through, thus ensuring the battery functions properly.

[0003] In existing wafer stacking machines, a positive electrode sheet is first picked up and placed on the stacking table. A separator folding mechanism then moves the separator forward and lays it on the surface of the positive electrode sheet. Next, a negative electrode sheet is picked up and placed on the separator surface. The separator folding mechanism then moves the separator in the opposite direction and lays it on the surface of the negative electrode sheet. This cycle is repeated to form the battery cell structure. After the cells are stacked, the separator needs to be wound around the surface of the cell structure to encapsulate and protect it. A robotic arm then transports the cell structure to the winding position. During this transport, the separator needs to be pulled out to a certain length to ensure it is wound onto the cell structure.

[0004] However, since the winding and stacking operations are performed by two separate devices, the separator is prone to misalignment after the unloading robot stretches it, which affects the cell packaging effect. Utility Model Content

[0005] The main purpose of this invention is to propose a coaxial integrated stacking device and stacking machine, which aims to avoid diaphragm misalignment and ensure the effect of cell packaging.

[0006] To achieve the above objectives, this utility model proposes a coaxial integrated stacking device, which includes:

[0007] The machine tool is equipped with a stacking table;

[0008] A drive mechanism is provided on the machine base, and the drive mechanism is provided with a guide rail;

[0009] A stacking mechanism, disposed on the guide rail, is used to transport positive and negative electrode sheets to the stacking stage to form a cell structure on the stacking stage; and

[0010] A feeding mechanism is provided on the guide rail and is used to feed the battery cell structure from the stacking table.

[0011] In one embodiment, the driving mechanism includes a base and a driving module. The base is disposed on the machine platform, the driving module is disposed on the base, the guide rail is disposed on the base, and the stacking mechanism and the unloading mechanism are both connected to the driving module.

[0012] In one embodiment, the feeding mechanism includes:

[0013] A transfer base, which is slidably disposed on the guide rail;

[0014] A vertical drive unit, wherein the vertical drive unit is disposed on the transfer base;

[0015] A clamping base is slidably disposed on the transfer base and connected to the output end of the vertical drive component;

[0016] A clamping drive member is disposed on the clamping base; and

[0017] A clamping structure is provided on the clamping base and connected to the output end of the clamping drive member. The clamping structure forms a clamping space for clamping the battery cell structure.

[0018] The vertical drive unit drives the clamping base to move relative to the stacking stage, and the clamping drive unit drives the clamping space to open or close in order to clamp or release the battery cell structure.

[0019] In one embodiment, the clamping structure includes:

[0020] A first gripper, the first gripper being disposed on the gripping base; and

[0021] The second gripper is connected to the output end of the clamping drive, and the clamping space is formed between the first gripper and the second gripper.

[0022] The clamping drive unit drives the second gripper to move relative to the first gripper, so as to open or close the clamping space.

[0023] In one embodiment, the coaxial integrated stacking device further includes a diaphragm tail winding assembly; the diaphragm tail winding assembly is disposed on the machine base and corresponds to the guide rail, the diaphragm tail winding assembly includes a flipping space, the flipping space is used to clamp or release the cell structure so that the diaphragm is wound around the surface of the cell structure;

[0024] The diaphragm tail winding assembly includes two clamping and flipping mechanisms disposed on the machine tool along a first direction. Each clamping and flipping mechanism includes a translation drive, a moving base, a flipping drive, and a clamping member. The translation drive is disposed on the machine tool, the moving base is movably disposed on the machine tool and connected to the output end of the translation drive, the flipping drive is disposed on the moving base, and the clamping member is connected to the output end of the flipping drive. The two clamping members cooperate to form the flipping space, which is used to clamp or release the cell structure. The first direction is consistent with the extension direction of the guide rail.

[0025] The two translational drive members drive the two moving seats to move closer or further apart along the first direction to clamp and fix the cell structure, and the two flipping drive members drive the two clamping members to flip synchronously so that the diaphragm is wound around the surface of the cell structure.

[0026] In one embodiment, the machine platform is provided with a first transport channel, a first correction space, a stacking channel, a second correction space, and a second transport channel at intervals along a first direction. The first transport channel is used to transport positive electrode sheets, the first correction space is used to correct the position of the positive electrode sheets, the second transport channel is used to transport negative electrode sheets, and the second correction space is used to correct the position of the negative electrode sheets. The stacking channel is formed on the surface of the stacking platform, and the first direction is consistent with the extension direction of the guide rail.

[0027] The stacking mechanism includes a first adsorption module, a second adsorption module, a translation module, and a lifting module. The first adsorption module and the second adsorption module are arranged along the first direction. The first adsorption module is used to adsorb the positive electrode sheet, and the second adsorption module is used to adsorb the negative electrode sheet. The translation module is disposed on the driving mechanism, and the lifting module is slidably disposed on the guide rail and connected to the output end of the translation module. There are two of each of the first adsorption module and the second adsorption module, and both of the two first adsorption modules and the two second adsorption modules are connected to the output end of the lifting module.

[0028] The translation module drives the lifting module to move along the first direction, and drives the two first adsorption modules and the two second adsorption modules to move synchronously. The lifting module drives the two first adsorption modules and the two second adsorption modules to move synchronously up and down along a direction perpendicular to the plane where the stacked channel is located.

[0029] In one embodiment, the stacking mechanism further includes four transfer bases slidably disposed on the guide rail, all four transfer bases being connected to the output end of the translation module, and the lifting module including four lifting drive components, each of the transfer bases being provided with one lifting drive component, and the output ends of the four lifting drive components being respectively connected to two first adsorption modules and two second adsorption modules.

[0030] The translation module drives the four transfer bases to move synchronously along the first direction, and the four lifting modules drive the two first adsorption modules and the two second adsorption modules to move synchronously along a direction perpendicular to the plane where the stacked channel is located.

[0031] In one embodiment, both the first adsorption module and the second adsorption module include:

[0032] An adsorption base, one end of each adsorption base is connected to the output end of a lifting drive component, the adsorption base extends along a second direction, the second direction being perpendicular to the first direction;

[0033] A negative pressure element, disposed on the adsorption base, is used to provide negative pressure; and

[0034] An adsorption plate is located at the end of the adsorption base away from the lifting drive component and is connected to the negative pressure component. The side of the adsorption plate facing away from the adsorption base forms an adsorption surface, which is used to adsorb the positive electrode sheet or the negative electrode sheet.

[0035] In one embodiment, the coaxial integrated stacking device further includes a diaphragm folding-back assembly, which is disposed on the stacking mechanism. The diaphragm passes through the diaphragm folding-back assembly and falls into the stacking channel. The diaphragm folding-back assembly is used to drive the diaphragm to reciprocate along the first direction so that the diaphragm is stacked on the positive electrode and the negative electrode in the stacking channel.

[0036] The diaphragm folding-back assembly includes two limiting modules, which are respectively located on the side of the two middle adsorption plates facing the adsorption base. Each limiting module includes at least one limiting roller, and a limiting channel is formed between the limiting rollers of the two limiting modules. The diaphragm enters the stacking channel through the limiting channel.

[0037] In one embodiment, the two first adsorption modules and the two second adsorption modules are arranged at equal intervals along the first direction, and the interval is a first distance;

[0038] The first transport channel, the first correction space, the stacking channel, the second correction space, and the second transport channel are arranged at equal intervals along the first direction, with the interval being the second distance.

[0039] This utility model also proposes a stacking machine, which includes the above-mentioned coaxial integrated stacking device.

[0040] The coaxial integrated stacking device in this invention transports the positive and negative electrode sheets to the stacking table via a stacking mechanism to complete the assembly of the battery cell structure. Simultaneously, a feeding mechanism feeds the battery cell structure from the stacking table along the extension direction of the guide rail and transfers it to other components for final winding. Because the stacking mechanism and the feeding mechanism are located on the same guide rail, the diaphragm stretching path and the stacking path are ensured to be collinear during final winding, preventing diaphragm misalignment due to path deviation. This solves the problem of diaphragm misalignment caused by separation of the final winding and stacking in traditional stacking machines, improving battery cell packaging quality and production stability. Furthermore, this design simplifies the equipment layout, resulting in a compact and clean design on the machine. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0042] Figure 1 This is a schematic diagram of the structure of an embodiment of the stacking machine provided by this utility model;

[0043] Figure 2 for Figure 1 A schematic diagram of the coaxial integrated lamination device in the first position;

[0044] Figure 3 for Figure 1 A schematic diagram of the coaxial integrated lamination device in the second position;

[0045] Figure 4 for Figure 1 Schematic diagram of the layout structure of the intermediate machine platform;

[0046] Figure 5 for Figure 1 Another layout diagram of the intermediate machine tool;

[0047] Figure 6 for Figure 1 A partial structural schematic diagram of a coaxial integrated lamination device;

[0048] Figure 7 for Figure 1 Schematic diagram of the intermediate lamination mechanism;

[0049] Figure 8 for Figure 1 A schematic diagram of the feeding mechanism.

[0050] Explanation of icon numbers:

[0051] 100. Coaxial integrated stacking device; 1. Machine base; 11. First transport channel; 111. First conveyor belt; 12. First correction space; 121. First correction table; 13. Stacking channel; 131. Stacking table; 14. Second correction space; 141. Second correction table; 15. Second transport channel; 151. Second conveyor belt; 2. Base; 21. Guide rail; 3. Stacking mechanism; 31. First adsorption module; 311. Adsorption base; 312. Negative pressure component; 313. Adsorption plate; 32. Second adsorption module; 33. Lifting drive component; 34. Rotary... 4. Diaphragm folding assembly; 41. Limiting module; 411. Limiting roller; 412. Limiting channel; 5. Diaphragm tail roll assembly; 51. Clamping and turning mechanism; 511. Moving seat; 512. Turning drive; 513. Clamping component; 6. Diaphragm unwinding assembly; 61. Discharge port; 7. Unloading mechanism; 71. Transfer base; 72. Vertical drive; 73. Clamping base; 74. Clamping drive; 75. Clamping structure; 751. Clamping space; 752. First gripper; 753. Second gripper; 81. Upper cutting assembly; 200. Stacking machine.

[0052] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0053] 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. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0054] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0055] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0056] In the lithium battery manufacturing process, the cell stacking process uses a separator to separate the positive and negative electrode plates, which are then stacked alternately to form the cell structure. The separator not only separates the positive and negative electrode plates to prevent short circuits but also allows lithium ions to pass through, thus ensuring the battery functions properly.

[0057] In existing wafer stacking machines, a positive electrode sheet is first picked up and placed on the stacking table. A separator folding mechanism then moves the separator forward and lays it on the surface of the positive electrode sheet. Next, a negative electrode sheet is picked up and placed on the separator surface. The separator folding mechanism then moves the separator in the opposite direction and lays it on the surface of the negative electrode sheet. This cycle is repeated to form the battery cell structure. After the cells are stacked, the separator needs to be wound around the surface of the cell structure to encapsulate and protect it. A robotic arm then transports the cell structure to the winding position. During this transport, the separator needs to be pulled out to a certain length to ensure it is wound onto the cell structure.

[0058] However, since the winding and stacking operations are performed by two separate devices, the separator is prone to misalignment after the unloading robot stretches it, which affects the cell packaging effect.

[0059] The main purpose of this invention is to propose a coaxial integrated stacking device 100 and a stacking machine 200, which aims to improve the avoidance of diaphragm misalignment and ensure the effect of cell packaging.

[0060] Please see Figures 1 to 8In one embodiment of this utility model, the coaxial integrated stacking device 100 includes a machine base 1, a drive mechanism, a stacking mechanism 3, and a feeding mechanism 7. The machine base 1 is provided with a stacking platform for alternately stacking positive and negative electrode sheets to form a cell structure. The drive mechanism is located on the machine base 1 and is provided with a guide rail 21. The stacking mechanism 3 is located on the guide rail 21 and is used to transport the positive and negative electrode sheets to the stacking platform. The feeding mechanism 7 is located on the guide rail 21 and is used to unload the cell structure from the stacking platform.

[0061] The coaxial integrated stacking device 100 in this invention transports the positive and negative electrode sheets to the stacking table 131 via the stacking mechanism 3 to complete the assembly of the battery cell structure. Simultaneously, the unloading mechanism 7 unloads the battery cell structure from the stacking table 131 along the extension direction of the guide rail 21 and transfers it to other components for final winding. Since all components are located on the same guide rail 21, the diaphragm stretching path and the stacking path are ensured to be collinear during final winding, preventing diaphragm misalignment due to path deviation. This solves the diaphragm misalignment problem caused by the separation of final winding and stacking in the traditional stacking machine 200, improving battery cell packaging quality and production stability. Furthermore, this design simplifies the equipment layout, making the structure on the machine 1 compact and the layout clean and simple.

[0062] In one embodiment, the drive mechanism includes a base 2 and a drive module. The base 2 is disposed on the machine base 1, the drive module is disposed on the base, the guide rail 21 is disposed on the base 2, and the stacking mechanism 3 and the unloading mechanism 7 are both connected to the drive module.

[0063] In this embodiment, the base 2 serves as the structural foundation, supporting the stacking mechanism 3 and the unloading mechanism 7 to move stably on the guide rail, while the drive module provides power for the movement of the stacking mechanism 3 and the unloading mechanism 7. Optionally, the drive mechanism may also consist of only one base, and the stacking mechanism 3 and the unloading mechanism 7 can move along the extension direction of the guide rail 21 through their own drive system.

[0064] In one implementation, please refer to Figure 8 The unloading mechanism 7 includes a transfer base 71, a vertical drive member 72, a clamping base 73, a clamping drive member 74, and a clamping structure 75. The transfer base 71 is slidably mounted on a slide rail. The vertical drive member 72 is mounted on the transfer base 71. The clamping base 73 is slidably mounted on the transfer base 71 and connected to the output end of the vertical drive member 72. The clamping drive member 74 is mounted on the clamping base 73. The clamping structure 75 is mounted on the clamping base 73 and connected to the output end of the clamping drive member 74. The clamping structure 75 forms a clamping space 751 for clamping the battery cell structure. The vertical drive member 72 drives the clamping base 73 to move relative to the stacking stage 131, and the clamping drive member 74 drives the clamping space 751 to open or close, thereby clamping or releasing the battery cell structure.

[0065] In this embodiment, the transfer base 71 is slidably mounted on the guide rail 21, providing a moving base for the entire unloading mechanism 7, allowing it to move along the axis of the guide rail 21 to adapt to the transfer requirements at different positions. A vertical drive unit 72 is mounted on the transfer base 71 and connected to the clamping base 73 via its output end, enabling the clamping base 73 to move up and down, thereby adjusting the position of the clamping structure 75 relative to the stacking channel 13 to ensure accurate clamping of the battery cell structure. A clamping drive unit 74 is mounted on the clamping base 73, driving the clamping space 751 in the clamping structure 75 to open or close, realizing the clamping or releasing operation of the battery cell structure. This allows the unloading mechanism 7 to flexibly and accurately complete the transfer task of the battery cell structure, improving the automation level and operating efficiency of the stacking equipment.

[0066] In one implementation, please refer to Figure 8 The clamping structure 75 includes a first gripper 752 and a second gripper 753. The first gripper 752 is disposed on the clamping base 73, and the second gripper 753 is connected to the output end of the clamping drive member 74, forming a clamping space 751 between the first gripper 752 and the second gripper 753. The clamping drive member 74 drives the second gripper 753 to move relative to the first gripper 752 to open or close the clamping space 751.

[0067] In this embodiment, the first gripper 752 is fixed on the clamping base 73, and the second gripper 753 is connected to the output end of the clamping drive 74. Driven by the clamping drive 74, the second gripper 753 can move relative to the first gripper 752, thereby opening or closing the clamping space 751.

[0068] Optionally, the first gripper 752 and the second gripper 753 can also be connected to the output end of the clamping drive 74 at the same time. Driven by the clamping drive 74, the first gripper 752 and the second gripper 753 can move closer to each other or further away from each other at the same time, thereby opening or closing the clamping space 751. This structure is common in the prior art and will not be described in detail here.

[0069] In one implementation, please refer to Figure 1The coaxial integrated stacking device 100 also includes a diaphragm tail winding assembly 5, which is mounted on the machine base 1 and corresponds to the guide rail 21. The diaphragm tail winding assembly 5 includes a flipping space for clamping or releasing the battery cell structure so that the diaphragm is wound around the surface of the battery cell structure. The diaphragm tail winding assembly 5 includes two clamping and flipping mechanisms 51 mounted on the machine base 1 along a first direction. Each clamping and flipping mechanism 51 includes a translation drive, a moving seat 511, a flipping drive 512, and a clamping member 513. The translation drive is mounted on the machine base 1. The moving seat 511 is movably mounted on the machine base 1 and connected to the output end of the translation drive. The flipping drive 512 is mounted on the moving seat 511. The clamping member 513 is connected to the output end of the flipping drive 512. The two clamping members 513 cooperate to form a flipping space for clamping or releasing the battery cell structure. The unloading mechanism 7 is located between the diaphragm shearing assembly and the diaphragm tail winding assembly 5, and is used to transfer the cell structure from the stacking channel 13 to the flipping space of the diaphragm tail winding assembly 5. Two translational drive members drive two moving seats 511 to move closer or further apart along a first direction to clamp and fix the cell structure. Two flipping drive members 512 drive two clamping members 513 to flip synchronously so that the diaphragm is wound around the surface of the cell structure. The first direction is consistent with the extension direction of the guide rail 21.

[0070] In this embodiment, the unloading mechanism 7 is used to transfer the stacked cell structure from the stacking channel 13 to the diaphragm tail winding assembly 5. The diaphragm tail winding assembly 5 clamps one end of the cell structure through two clamping and flipping mechanisms 51, winding the diaphragm around the surface of the cell structure to achieve encapsulation and protection of the cell structure, thereby improving the safety and stability of the cell structure. The two translational drive members in the two clamping and flipping mechanisms 51 drive the two moving seats 511 to move closer or further apart along the first direction to accommodate cell structures of different sizes. They can stably clamp both sides of the cell structure and flip it so that the diaphragm is wound around the cell structure.

[0071] Optionally, the diaphragm tail winding assembly 5 may also be equipped with a hot pressing device for appropriately heating the wound cell structure, so that the diaphragm fits the cell structure better and improves the encapsulation effect.

[0072] In one implementation, please refer to Figures 2 to 4The machine platform 1 is provided with a first transport channel 11, a first correction space 12, a stacking channel 13, a second correction space 14, and a second transport channel 15 at intervals along a first direction. The first transport channel 11 is used to transport positive electrode sheets, the first correction space 12 is used to correct the position of the positive electrode sheets, the second transport channel 15 is used to transport negative electrode sheets, and the second correction space 14 is used to correct the position of the negative electrode sheets. The surface of the stacking stage 131 forms the stacking channel 13. The stacking mechanism 3 includes a first adsorption module 31, a second adsorption module 32, a translation module, and a lifting module. The first adsorption module 31 and the second adsorption module 32 are arranged along the first direction. The first adsorption module 31 is used to adsorb positive electrode sheets, and the second adsorption module 32 is used to adsorb negative electrode sheets. The translation module is located on the drive mechanism, and the lifting module is slidably located on the guide rail 21 and connected to the output end of the translation module. There are two of each of the first adsorption module 31 and the second adsorption module 32, and both the two first adsorption modules 31 and the two second adsorption modules 32 are connected to the output end of the lifting module. The translation module drives the lifting module to move along the first direction, and drives the two first adsorption modules 31 and the two second adsorption modules 32 to move synchronously. The lifting module drives the two first adsorption modules 31 and the two second adsorption modules 32 to move synchronously along the plane perpendicular to the stacked channel 13.

[0073] In this embodiment, the translation module drives the lifting module to move along a first direction, and simultaneously moves the two first adsorption modules 31 and the two second adsorption modules 32, which have a first position and a second position. The lifting module drives the two first adsorption modules 31 and the two second adsorption modules 32 to move synchronously up and down along a direction perpendicular to the plane of the stacking channel 13. In the first position, the two first adsorption modules 31 correspond to the first transport channel 11 and the first correction space 12, respectively, and the two second adsorption modules 32 correspond to the stacking channel 13 and the second correction space 14, respectively. In the second position, the two first adsorption modules 31 correspond to the first correction space 12 and the stacking channel 13, respectively, and the two second adsorption modules 32 correspond to the second correction space 14 and the second transport channel 15, respectively.

[0074] In this embodiment, the first transport channel 11, the first correction space 12, the stacking channel 13, the second correction space 14, and the second transport channel 15 are arranged sequentially and at intervals along the machine base 1. Therefore, the positive electrode and the negative electrode are directly fed from both sides of the stacking channel 13 to the first correction space 12 and the second correction space 14, respectively. The structure is more compact, which improves the efficiency of feeding and stacking, and reduces the number of times the positive electrode and the negative electrode are handled, effectively preventing the electrode from being damaged during handling.

[0075] In this embodiment, the positive and negative electrode sheets will experience a certain angular offset during transport through the first transport channel 11 and the second transport channel 15. Therefore, the positions of the positive and negative electrode sheets are corrected by the first correction space 12 and the second correction space 14 to ensure that the positive and negative electrode sheets have accurate positions and orientations before entering the stacking channel 13, thereby improving the stacking quality. The first correction space 12 and the second correction space 14 can be equipped with pushers and limiting blocks. The pushers push the positive and negative electrode sheets to resist the limiting blocks, thereby ensuring that the positive and negative electrode sheets are in accurate positions.

[0076] Understandably, the correction space can employ a visual inspection system combined with a pusher. A camera captures the position information of the positive and negative electrodes in real time, and the control system uses this information to drive the pusher to fine-tune the electrodes, ensuring they are always transported along the correct path. The application of correction spaces is quite common in existing technologies; therefore, the specific structures of the first correction space 12 and the second correction space 14 are not limited here.

[0077] In one implementation, please refer to Figure 1 The machine base 1 is also equipped with a diaphragm unwinding assembly 6, which is arranged adjacent to the base 2. The diaphragm unwinding assembly 6 has a discharge port 61, which is located above the stacking channel 13. The diaphragm unwinding assembly 6 is used to supply diaphragms. The diaphragm flows out from the discharge port 61, passes through the diaphragm folding assembly 4, and enters the stacking channel 13.

[0078] In this embodiment, the diaphragm unwinding assembly 6 ensures a stable and continuous supply of the diaphragm to the stacking channel 13. Furthermore, the discharge port 61 is located above the stacking channel 13, allowing the diaphragm to flow in naturally under gravity. The diaphragm is guided and positioned by the diaphragm folding assembly 4, ensuring the diaphragm accurately enters the stacking channel 13 and is positioned between the positive and negative electrode sheets, further improving the accuracy and efficiency of the stacking process. The diaphragm unwinding assembly 6 can also be equipped with a tension control roller to adjust the diaphragm tension in real time, ensuring the diaphragm remains flat during transport and preventing deformation or breakage due to uneven tension.

[0079] Understandably, the diaphragm unwinding assembly 6 is quite common in the prior art. Therefore, the specific structure of the diaphragm unwinding assembly 6 is not limited here, but it is necessary to ensure that the diaphragm can enter the stacking channel 13 from the diaphragm folding assembly 4.

[0080] In one implementation, please refer to Figure 1 , Figure 6 and Figure 8The stacking mechanism 3 also includes four transfer bases 34 slidably disposed on the guide rail 21. Each of the four transfer bases 34 is connected to the output end of the translation module. The lifting module includes four lifting drive components 33, with one lifting drive component 33 provided on each transfer base 34. The output ends of the four lifting drive components 33 are respectively connected to two first adsorption modules 31 and two second adsorption modules 32. The translation module drives the four transfer bases 34 to move synchronously along a first direction, and the four lifting modules drive the two first adsorption modules 31 and the two second adsorption modules 32 to move synchronously along a direction perpendicular to the plane of the stacking channel 13.

[0081] In this embodiment, the guide rail 21 of the base 2 provides stable support and precise guidance for the movement of the stacking mechanism 3. The translation module drives the four transfer bases 34 to move synchronously, ensuring that the stacking mechanism 3 can switch between the first and second positions. It is understood that since all components are mounted on the same guide rail 21, their movement can be controlled by a unified drive system, ensuring consistency in movement between components. For example, the translation module can use a linear motor, with the four transfer bases 34 directly mounted on the linear motor. This facilitates controlling the synchronous movement of the four transfer bases 34, making the structure more compact, simplifying the connections between components, reducing the risk of failure due to complex connections, and further reducing errors in the production process. The four lifting drive components 33 respectively drive the corresponding first adsorption module 31 or second adsorption module 32, enabling the first adsorption module 31 and the second adsorption module 32 to move relative to the machine base 1, realizing the adsorption and release of positive and negative electrode sheets. It is understood that the lifting drive components 33 can be cylinders or electric push rods. The first adsorption module 31 and the second adsorption module 32 can be moved synchronously along a direction perpendicular to the stacked channel 13 through program control.

[0082] Alternatively, only one transfer base 34 can be provided, and only one lifting drive 33 can be provided on the transfer base 34. The output end of the lifting drive 33 is connected to both first adsorption modules 31 and two second adsorption modules 32 at the same time, so that the synchronous movement of the first adsorption module 31 or the second adsorption module 32 can also be achieved.

[0083] In one implementation, please refer to Figure 6 and Figure 7Both the first adsorption module 31 and the second adsorption module 32 include an adsorption base 311, a negative pressure component 312, and an adsorption disk 313. One end of each adsorption base 311 is connected to the output end of a lifting drive component 33. The adsorption base 311 extends along a second direction, which is perpendicular to the first direction. The negative pressure component 312 is disposed on the adsorption base 311 and is used to provide negative pressure. The adsorption disk 313 is disposed at the end of the adsorption base 311 away from the lifting drive component 33 and is in communication with the negative pressure component 312. The side of the adsorption disk 313 facing away from the adsorption base 311 forms an adsorption surface, which is used to adsorb positive or negative electrode sheets.

[0084] In this embodiment, the first adsorption module 31 and the second adsorption module 32 generate negative pressure through the negative pressure component 312, which is connected to the adsorption disk 313, thereby enabling the adsorption disk 313 to adsorb the positive and negative electrode sheets.

[0085] In one implementation, please refer to Figure 2 , Figure 6 and Figure 7 The coaxial integrated stacking device 100 also includes a diaphragm folding-back assembly 4, which is disposed on the stacking mechanism 3. The diaphragm passes through the diaphragm folding-back assembly 4 and falls into the stacking channel 13. The diaphragm folding-back assembly 4 is used to drive the diaphragm to reciprocate along a first direction so that the diaphragm is stacked on the positive electrode and the negative electrode in the stacking channel 13. The diaphragm folding-back assembly 4 includes two limiting modules 41, which are respectively disposed on the side of the two middle adsorption disks 313 facing the adsorption base 311. Each limiting module 41 includes at least one limiting roller 411. A limiting channel 412 is formed between the limiting rollers 411 of the two limiting modules 41. The diaphragm enters the stacking channel 13 through the limiting channel 412.

[0086] In this embodiment, each limiting module 41 includes two limiting rollers 411, and the limiting rollers 411 of one limiting module 41 correspond one-to-one with the limiting rollers 411 of the other limiting module 41. The limiting rollers 411 are used to push the diaphragm to move. The two limiting modules 41 respectively push the diaphragm to achieve reciprocating movement of the diaphragm, allowing the diaphragm to continuously adjust its position as the positive and negative electrode sheets are stacked, ensuring that the positive and negative electrode sheets are separated by the diaphragm, thereby improving the stability of the cell structure, reducing waiting time, and increasing efficiency. It is understood that each limiting module 41 is provided with multiple limiting rollers 411 to enhance stability and ensure smooth pushing during the diaphragm pushing process; therefore, the specific number of limiting rollers 411 is not limited.

[0087] Optionally, each limiting module 41 may also include only one limiting roller 411, so that the diaphragm is clamped and moved back and forth by two limiting rollers 411 to achieve the stacking of the diaphragm.

[0088] Understandably, the surface of the limiting roller 411 can be specially treated, such as by adding a wear-resistant coating or elastic material, to further reduce wear on the diaphragm and improve the diaphragm's passage.

[0089] Understandably, the coaxial integrated stacking device 100 drives two first adsorption modules 31 and two second adsorption modules 32 to move synchronously along a direction perpendicular to the stacking channel 13 via a lifting module, so as to simultaneously place or lift the positive electrode and negative electrode on the machine base 1. At the same time, the translation module drives the two first adsorption modules 31, the separator folding-back assembly 4, and the two second adsorption modules 32 to move synchronously along a first direction on the guide rail 21, forming a first position and a second position. When changing from the first position to the second position, the separator folding-back assembly 4 moves the separator to be stacked on the stacking channel 13, and the first adsorption modules 31 adsorb the positive electrode and place it on the stacking channel 13, adhering to the separator. When changing from the second position to the first position, the separator folding-back assembly 4 moves the separator to be stacked on the stacking channel 13, and the second adsorption modules 32 adsorb the negative electrode and place it on the stacking channel 13, adhering to the separator. This cycle is repeated to form a cell structure in which the positive and negative electrode are stacked alternately. This allows the stacking of positive and negative electrode plates to be carried out synchronously, maintaining consistency, improving precision, and effectively solving the problem of error accumulation caused by independent operation of each part, thereby significantly improving the quality of the cell structure.

[0090] In one implementation, please refer to Figure 2 and Figure 3 Two first adsorption modules 31 and two second adsorption modules 32 are arranged at equal intervals along a first direction, with the interval being a first distance. A first transport channel 11, a first correction space 12, a stacking channel 13, a second correction space 14, and a second transport channel 15 are arranged at equal intervals along the first direction, with the interval being a second distance.

[0091] In this embodiment, by precisely controlling the distance between the first adsorption module 31 and the second adsorption module 32, as well as the distance between the first transport channel 11, the first correction space 12, the stacking channel 13, the second correction space 14 and the second transport channel 15, electrode offset or stacking error caused by uneven adsorption position can be effectively avoided, thereby improving the accuracy and efficiency of stacking.

[0092] In one implementation, please refer to Figure 2 and Figure 3 The first distance is equal to the second distance.

[0093] In this embodiment, the first distance being equal to the second distance ensures that when the first adsorption module 31 and the second adsorption module 32 move along the first direction, they can be accurately aligned with the corresponding transport channels or correction spaces, ensuring that the positions of the positive and negative electrode sheets remain consistent during the adsorption, transport, and stacking process, thereby further improving the accuracy and efficiency of stacking.

[0094] In one implementation, please refer to Figure 2 and Figure 3 Along the first direction, the machine 1 is provided with a first conveyor belt 111, a first correction table 121, a stacking table 131, a second correction table 141 and a second conveyor belt 151 arranged at intervals.

[0095] In this embodiment, the machine base 1 serves as the foundation of the entire lamination equipment and is used for other components. The surface of the first conveyor belt 111 forms a first transport channel 11, the surface of the first alignment table 121 forms a first alignment space 12, the surface of the second conveyor belt 151 forms a second transport channel 15, and the surface of the second alignment table 141 forms a second alignment space 14. A lamination channel 13 is formed on the side of the lamination table 131 facing away from the machine base 1. The lamination channel 13 on the lamination table 131 is used for stacking positive and negative electrode sheets to form a cell structure. Along the second direction, the first conveyor belt 111, the first alignment table 121, the lamination table 131, the second alignment table 141, and the second conveyor belt 151 are sequentially and spaced apart on the machine base 1.

[0096] Optionally, please refer to Figure 4 The first conveyor belt 111 and the second conveyor belt 151 can simultaneously transport multiple positive and negative electrode sheets to improve production efficiency. In this embodiment, the first conveyor belt 111 and the second conveyor belt 151 simultaneously transport two positive electrode sheets or two negative electrode sheets along a first direction, wherein electrode sheets of the same polarity are arranged along a second direction, which is perpendicular to the first direction. Alternatively, please refer to... Figure 5 The first conveyor belt 111 and the second conveyor belt 151 can continuously transport single positive and negative electrode sheets along the second direction. After two positive electrode sheets or two negative electrode sheets are transported to the designated position, the two positive electrode sheets or two negative electrode sheets are simultaneously transported to the first correction stage 121 or the second correction stage 141.

[0097] Optionally, the machine 1 may also be equipped with a protective cover and a safety door to protect the safety of the operators and reduce the noise generated during the operation of the stacking equipment.

[0098] In one implementation, please refer to Figure 1 and Figure 6The coaxial integrated stacking device 100 also includes a shearing drive, a lower cutter, and an upper cutting assembly 81. The shearing drive is located on the machine base 1 and is adjacent to the stacking channel 13. The lower cutter is located on the machine base 1 and is connected to the output end of the shearing drive. The upper cutting assembly 81 is slidably mounted on the guide rail 21 and is equipped with an upper cutter, with a limiting groove formed on the side of the upper cutter facing the lower cutter. The shearing drive drives the lower cutter to move relative to the upper cutter and insert it into the limiting groove to shear the diaphragm located between the lower cutter and the upper cutter.

[0099] In this embodiment, a shearing drive unit moves the lower cutter relative to the upper cutter, and a limiting groove is used to shear the diaphragm, ensuring that the cell structure has a diaphragm section of the required length for subsequent winding operations. The shearing drive unit can be a high-speed cylinder or an electric linear actuator to improve shearing speed and response capability, meeting the demands of high-speed production.

[0100] Please see Figure 1 The present invention also proposes a stacking machine 200, which includes a coaxial integrated stacking device 100. The specific structure of the coaxial integrated stacking device 100 is as described in the above embodiments. Since the stacking machine 200 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0101] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A coaxial integrated lamination device, characterized in that, The coaxial integrated stacking device includes: The machine tool is equipped with a stacking table; A drive mechanism is provided on the machine base, and the drive mechanism is provided with a guide rail; A stacking mechanism, disposed on the guide rail, is used to transport positive and negative electrode sheets to the stacking stage to form a cell structure on the stacking stage; and A feeding mechanism is provided on the guide rail and is used to feed the battery cell structure from the stacking table.

2. The coaxial integrated stacking device as described in claim 1, characterized in that, The driving mechanism includes a base and a driving module. The base is disposed on the machine platform, the driving module is disposed on the base, the guide rail is disposed on the base, and the stacking mechanism and the unloading mechanism are both connected to the driving module.

3. The coaxial integrated stacking device as described in claim 1, characterized in that, The feeding mechanism includes: A transfer base, which is slidably disposed on the guide rail; A vertical drive unit, wherein the vertical drive unit is disposed on the transfer base; A clamping base is slidably disposed on the transfer base and connected to the output end of the vertical drive component; A clamping drive member is disposed on the clamping base; and A clamping structure is provided on the clamping base and connected to the output end of the clamping drive member. The clamping structure forms a clamping space for clamping the battery cell structure. The vertical drive unit drives the clamping base to move relative to the stacking stage, and the clamping drive unit drives the clamping space to open or close in order to clamp or release the battery cell structure.

4. The coaxial integrated stacking device as described in claim 3, characterized in that, The clamping structure includes: A first gripper, the first gripper being disposed on the gripping base; and The second gripper is connected to the output end of the clamping drive, and the clamping space is formed between the first gripper and the second gripper. The clamping drive unit drives the second gripper to move relative to the first gripper, so as to open or close the clamping space.

5. The coaxial integrated stacking device as described in claim 1, characterized in that, The coaxial integrated stacking device further includes a diaphragm tail winding assembly; the diaphragm tail winding assembly is disposed on the machine base and corresponds to the guide rail, the diaphragm tail winding assembly includes a flipping space, the flipping space is used to clamp or release the cell structure so that the diaphragm is wound around the surface of the cell structure; The diaphragm tail winding assembly includes two clamping and flipping mechanisms disposed on the machine tool along a first direction. Each clamping and flipping mechanism includes a translation drive, a moving base, a flipping drive, and a clamping member. The translation drive is disposed on the machine tool, the moving base is movably disposed on the machine tool and connected to the output end of the translation drive, the flipping drive is disposed on the moving base, and the clamping member is connected to the output end of the flipping drive. The two clamping members cooperate to form the flipping space, which is used to clamp or release the cell structure. The first direction is consistent with the extension direction of the guide rail. The two translational drive members drive the two moving seats to move closer or further apart along the first direction to clamp and fix the cell structure, and the two flipping drive members drive the two clamping members to flip synchronously so that the diaphragm is wound around the surface of the cell structure.

6. The coaxial integrated stacking device as described in claim 1, characterized in that, The machine platform is provided with a first transport channel, a first correction space, a stacking channel, a second correction space, and a second transport channel at intervals along a first direction. The first transport channel is used to transport positive electrode sheets, the first correction space is used to correct the position of the positive electrode sheets, the second transport channel is used to transport negative electrode sheets, and the second correction space is used to correct the position of the negative electrode sheets. The stacking channel is formed on the surface of the stacking platform, and the first direction is consistent with the extension direction of the guide rail. The stacking mechanism includes a first adsorption module, a second adsorption module, a translation module, and a lifting module. The first adsorption module and the second adsorption module are arranged along the first direction. The first adsorption module is used to adsorb the positive electrode sheet, and the second adsorption module is used to adsorb the negative electrode sheet. The translation module is disposed on the driving mechanism, and the lifting module is slidably disposed on the guide rail and connected to the output end of the translation module. There are two of each of the first adsorption module and the second adsorption module, and both of the two first adsorption modules and the two second adsorption modules are connected to the output end of the lifting module. The translation module drives the lifting module to move along the first direction, and drives the two first adsorption modules and the two second adsorption modules to move synchronously. The lifting module drives the two first adsorption modules and the two second adsorption modules to move synchronously up and down along a direction perpendicular to the plane where the stacked channel is located.

7. The coaxial integrated stacking device as described in claim 6, characterized in that, The stacking mechanism further includes four transfer bases slidably disposed on the guide rail. All four transfer bases are connected to the output end of the translation module. The lifting module includes four lifting drive components. Each transfer base is provided with one lifting drive component. The output ends of the four lifting drive components are respectively connected to two first adsorption modules and two second adsorption modules. The translation module drives the four transfer bases to move synchronously along the first direction, and the four lifting modules drive the two first adsorption modules and the two second adsorption modules to move synchronously along a direction perpendicular to the plane where the stacked channel is located.

8. The coaxial integrated stacking device as described in claim 7, characterized in that, Both the first adsorption module and the second adsorption module include: An adsorption base, one end of each adsorption base is connected to the output end of a lifting drive component, the adsorption base extends along a second direction, the second direction being perpendicular to the first direction; A negative pressure element, disposed on the adsorption base, is used to provide negative pressure; and An adsorption plate is located at the end of the adsorption base away from the lifting drive component and is connected to the negative pressure component. The side of the adsorption plate facing away from the adsorption base forms an adsorption surface, which is used to adsorb the positive electrode sheet or the negative electrode sheet.

9. The coaxial integrated stacking device as described in claim 8, characterized in that, The coaxial integrated stacking device further includes a diaphragm folding-back assembly, which is disposed on the stacking mechanism. The diaphragm passes through the diaphragm folding-back assembly and falls into the stacking channel. The diaphragm folding-back assembly is used to drive the diaphragm to reciprocate along the first direction so that the diaphragm is stacked on the positive electrode and the negative electrode in the stacking channel. The diaphragm folding-back assembly includes two limiting modules, which are respectively located on the side of the two middle adsorption plates facing the adsorption base. Each limiting module includes at least one limiting roller, and a limiting channel is formed between the limiting rollers of the two limiting modules. The diaphragm enters the stacking channel through the limiting channel.

10. The coaxial integrated stacking device as described in claim 6, characterized in that, Two first adsorption modules and two second adsorption modules are arranged at equal intervals along the first direction, with the interval being a first distance; The first transport channel, the first correction space, the stacking channel, the second correction space, and the second transport channel are arranged at equal intervals along the first direction, with the interval being the second distance.

11. A stacking machine, characterized in that, The stacking machine includes the coaxial integrated stacking device as described in any one of claims 1 to 10.

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