Battery cell multi-layer lamination positioning device for lithium ion battery processing

Abstract

The invention discloses a battery cell multi-layer lamination positioning device for lithium ion battery processing, and relates to the technical field of battery manufacturing. The device comprises a transfer assembly and an overlapping assembly; the transferring assembly comprises a transferring frame, a transferring platform, a first conveying frame, a second conveying frame, a support, an air cylinder and a suction cup installed at the telescopic end of the air cylinder. The overlapping assembly comprises an overlapping frame, a lead screw, a lifting seat matched with the lead screw, an overlapping platform fixed to the lifting seat, a cross beam fixed to the top of the overlapping frame, a top plate fixed to the lower portion of the cross beam, a motor fixed to the upper portion of the top plate, a rack connected with the output end of the motor through a gear, and a bottom plate fixed to the lower side face of the rack. The adsorption seat is fixed in the middle of the lower side surface of the bottom plate. The transfer assembly and the overlapping assembly are integrated in the same equipment, so that the whole-process closed-loop operation from grabbing to overlapping of the battery cells is realized, the process path is shortened, intermediate caching and manual intervention are reduced, and the automation degree is improved.

Description

Technical Field

[0001] This invention belongs to the field of battery manufacturing technology, and in particular relates to a multi-layer stacking and positioning device for lithium-ion battery processing. Background Technology

[0002] In the manufacturing process of lithium-ion batteries, especially high-energy-density pouch batteries, the multi-layer stacking of cells is one of the key steps in the electrode assembly stage. This process requires the precise stacking of multiple positive electrodes, negative electrodes, and separators in a specific order to form a well-structured and highly aligned cell unit. The stacking accuracy directly affects the battery's internal resistance consistency, cycle life, and safety.

[0003] Currently, the industry generally adopts a step-by-step process: first, a separate handling or robotic arm device picks up individual battery cells from the conveyor line and transfers them to a temporary storage station, and then another stacking or lamination mechanism completes the layer-by-layer positioning and stacking. However, this traditional solution has obvious drawbacks: on the one hand, the separation of the handling and lamination functions leads to a lengthy process flow, slow cycle time, and large equipment footprint; on the other hand, during multiple handovers, positioning deviations, unstable adsorption, or mechanical vibrations can easily cause battery cell displacement, wrinkles, or even damage, especially for thin and soft pouch cells, where the problem is more prominent.

[0004] To address this issue, we provide a multi-layer stacking and positioning device for lithium-ion battery processing to solve the aforementioned problems. Summary of the Invention

[0005] The purpose of this invention is to provide a multi-layer stacking and positioning device for lithium-ion battery processing. By integrating the cell transfer and multi-layer stacking functions into the same device and adopting a modular layout and high-precision positioning mechanism, it solves the problems of the prior art, such as the separation of cell transfer and stacking processes, long process flow, low positioning accuracy, easy damage or displacement of soft-pack cells, and difficulty in achieving efficient, stable and automated multi-layer stacking.

[0006] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0007] This invention relates to a multi-layer stacking and positioning device for lithium-ion battery processing, comprising a transfer assembly and a stacking assembly adjacent to the transfer assembly; the transfer assembly includes a transfer frame, a transfer platform fixed to the upper part of the transfer frame, a first conveyor frame fixed to the top of the transfer frame, a second conveyor frame installed on the upper part of the first conveyor frame, a bracket mounted on the second conveyor frame, a cylinder fixed to the outside of the bracket, and a suction cup installed on the telescopic end of the cylinder; the stacking assembly includes a stacking frame fixed to the transfer frame, a lead screw mounted on the middle position of the side of the stacking frame via a shaft seat, a motor for driving the lead screw, a lifting seat cooperating with the lead screw, a stacking platform fixed to the lifting seat, a crossbeam fixed to the top of the stacking frame, a top plate fixed to the lower part of the crossbeam, a motor fixed to the upper part of the top plate, a rack connected to the output end of the motor via a gear, a base plate fixed to the lower side of the rack, and an adsorption seat fixed to the middle position of the lower side of the base plate.

[0008] The present invention is further configured such that both the first conveyor frame and the second conveyor frame are equipped with conveyor belts, wherein the conveyor belt in the first conveyor frame is connected to the outer frame of the second conveyor frame, and the conveyor belt in the second conveyor frame is connected to the support.

[0009] The invention is further configured such that the motor is fixed above the end of the crossbeam, and a guide rod is provided between the lower end of the crossbeam and the bottom of the stacking frame, the guide rod passing through the side of the lifting seat.

[0010] The present invention is further configured such that there are two guide rods, symmetrically arranged on the left and right sides of the lead screw, the upper end of each guide rod is fixed to the lower side of the crossbeam, and the lower end is fixed to the bottom of the stacking frame, and the side of the lifting seat is provided with a guide hole that slides with the guide rod.

[0011] The present invention is further configured such that a slider is fixed on the upper side of the base plate, and the slider and the guide rail fixed on the lower side of the top plate form a sliding pair;

[0012] There are two guide rails, which are fixed in parallel on the left and right sides of the lower side of the top plate. Each guide rail is slidably engaged with the slider on the corresponding side. The slider is fixedly connected to the upper side of the bottom plate by screws.

[0013] The present invention is further configured such that the height of the stacking platform is lower than that of the transfer platform, the adsorption seat is located above the stacking platform, and the adsorption seat can move back and forth above the transfer platform and the stacking platform by a motor-driven rack and pinion to drive the base plate.

[0014] The present invention is further configured such that the adsorption seat has a vacuum chamber inside, and a plurality of evenly distributed suction holes are opened on its lower side, the suction holes being connected to the vacuum chamber, and the upper side of the adsorption seat being connected to an external vacuum pipeline through a flange joint.

[0015] The present invention is further configured such that the center line of the adsorption seat is collinear with the center line of the stacking platform, and the minimum distance between the lower side of the adsorption seat and the upper side of the stacking platform is not greater than twice the thickness of a single layer of the battery cell.

[0016] The present invention has the following beneficial effects:

[0017] 1. This invention integrates the transfer component and the stacking component into the same device, realizing a closed-loop operation of the entire process from cell picking to stacking, shortening the process path, reducing intermediate buffers and manual intervention, improving the degree of automation, and reducing the equipment footprint and maintenance costs.

[0018] 2. This invention achieves high-precision reciprocating transfer of the adsorption seat between the transfer platform and the stacking platform by setting a motor-driven rack to drive the base plate to move horizontally along the guide rail, and by cooperating with the sliding pair formed by the slider and the guide rail.

[0019] 3. This invention achieves fine adjustment of the battery cell gripping position in the horizontal direction by setting up a two-stage conveying adjustment mechanism consisting of a first conveyor frame and a second conveyor frame in the transfer component. It can flexibly adapt to battery cells of different sizes or arrangements, ensuring that the suction cup is always accurately aligned with the center of the battery cell, avoiding adsorption failure or uneven force on the edges due to misalignment, thereby improving the gripping success rate and operational stability.

[0020] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0022] Figure 1 This is a schematic diagram of the left front of a multi-layer stacking positioning device for lithium-ion battery cells.

[0023] Figure 2 This is a schematic diagram of the right front of a multi-layer stacking and positioning device for lithium-ion battery cells.

[0024] Figure 3 A schematic diagram of the left rear of a multi-layer stacking positioning device for lithium-ion battery cells.

[0025] Figure 4 This is a schematic diagram of the right rear of a multi-layer stacking and positioning device for lithium-ion battery cells.

[0026] Figure 5 A front view of a multi-layer stacking and positioning device for lithium-ion battery cells.

[0027] Figure 6 Rear view of a multi-layer stacking and positioning device for lithium-ion battery cells.

[0028] The attached diagram lists the components represented by each number as follows:

[0029] 1. Transfer assembly; 11. Transfer frame; 12. Transfer platform; 13. First conveyor frame; 14. Second conveyor frame; 15. Support; 16. Cylinder; 17. Suction cup; 2. Stacking assembly; 21. Stacking frame; 22. Lead screw; 23. Guide rod; 24. Lifting seat; 25. Stacking platform; 26. Motor; 27. Crossbeam; 28. Motor; 29. ​​Top plate; 210. Rack; 211. Slider; 212. Base plate; 213. Guide rail; 214. Adsorption seat. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0031] Example

[0032] Please see Figure 1-6 This invention relates to a multi-layer stacking and positioning device for lithium-ion battery processing, comprising a transfer component 1 and a stacking component 2 adjacent to the transfer component 1; by integrating the cell transfer and multi-layer stacking functions into the same device and adopting a modular layout, the process flow path is effectively shortened; wherein:

[0033] The transfer assembly 1 includes a transfer frame 11, a transfer platform 12 fixed to the upper part of the transfer frame 11, a first conveyor frame 13 fixed to the top of the transfer frame 11, a second conveyor frame 14 installed on the upper part of the first conveyor frame 13, a bracket 15 mounted on the second conveyor frame 14, a cylinder 16 fixed to the outside of the bracket 15, and a suction cup 17 installed on the telescopic end of the cylinder 16. The transfer assembly 1 adjusts the left and right gripping positions through the first conveyor frame 13 and the second conveyor frame 14. The suction cup 17 can be vertically pressed down to adsorb the battery cell under the drive of the cylinder 16. The bracket 15 serves as a rigid support to ensure that there is no shaking when the cylinder 16 moves, thereby achieving non-destructive and stable picking up of thin soft-pack battery cells and preventing them from falling or deflecting due to weak adsorption.

[0034] The stacking assembly 2 includes a stacking frame 21 fixed to the transfer frame 11, a lead screw 22 mounted on the middle of the side of the stacking frame 21 via a bearing, a motor 26 for driving the lead screw 22, a lifting seat 24 cooperating with the lead screw 22, a stacking platform 25 fixed to the lifting seat 24, a crossbeam 27 fixed to the top of the stacking frame 21, a top plate 29 fixed to the lower part of the crossbeam 27, a motor 28 fixed to the upper part of the top plate 29, a rack 210 connected to the output end of the motor 28 via a gear, a base plate 212 fixed to the lower side of the rack 210, and an adsorption seat 214 fixed to the middle of the lower side of the base plate 212. The lead screw 22 and the motor 26 constitute a Z-axis adjustment system for lifting the stacked battery cells layer by layer to ensure that the new layer of battery cells always falls on a fixed height reference plane. The motor 28 drives the rack 210 to move the adsorption seat 214 in the X-axis to achieve precise transfer from the transfer area to the stacking area. The two work together to complete a closed-loop operation, meeting the requirements for automatic stacking of multi-layer cells.

[0035] Specifically, the adsorption seat 214 has a vacuum chamber inside, and multiple evenly distributed suction holes are opened on its lower side to form a large area of ​​negative pressure adsorption area, so that the adsorption force is evenly distributed on the entire surface of the battery cell, effectively maintaining its flatness. The suction holes are connected to the vacuum chamber, and the upper side of the adsorption seat 214 is connected to the external vacuum pipeline through a flange joint for easy maintenance and switching. The center line of the adsorption seat 214 is collinear with the center line of the stacking platform 25, and the minimum distance from the lower side of the adsorption seat 214 to the upper side of the stacking platform 25 is no more than twice the thickness of a single layer of the battery cell, ensuring that each layer of battery cell can be accurately placed on the same center line.

[0036] Furthermore, the height of the stacking platform 25 is lower than that of the transfer platform 12, and the adsorption seat 214 is located above the stacking platform 25. The adsorption seat 214 can drive the rack 210 to move the base plate 212 reciprocally above the transfer platform 12 and the stacking platform 25 via the motor 28. A slider 211 is fixed on the upper side of the base plate 212. The slider 211 and the guide rail 213 fixed on the lower side of the top plate 29 form a sliding pair, which effectively suppresses vibration and sway. There are two guide rails 213, which are fixed parallel to each other on the left and right sides of the lower side of the top plate 29. Each guide rail 213 is slidably engaged with the slider 211 on the corresponding side. The slider 211 is fixedly connected to the upper side of the base plate 212 by screws.

[0037] Both the first conveyor frame 13 and the second conveyor frame 14 are equipped with conveyor belts. The conveyor belt in the first conveyor frame 13 is connected to the outer frame of the second conveyor frame 14, and the conveyor belt in the second conveyor frame 14 is connected to the support 15. The motor 26 is fixed above the end of the crossbeam 27. A guide rod 23 is provided between the lower end of the crossbeam 27 and the bottom of the stacking frame 21. The guide rod 23 passes through the side of the lifting seat 24 to ensure that it does not twist or tilt during vertical movement. There are two guide rods 23, symmetrically arranged on the left and right sides of the lead screw 22. The upper end of each guide rod 23 is fixed to the lower side of the crossbeam 27, and the lower end is fixed to the bottom of the stacking frame 21. The side of the lifting seat 24 is provided with guide holes that slide with the guide rods 23.

[0038] The operation process of this embodiment is as follows: First, the left and right gripping positions are adjusted by the first conveyor frame 13 and the second conveyor frame 14; then, the cylinder 16 drives the suction cup 17 to move downward and close to the upper surface of the battery cell, and the external vacuum system forms a negative pressure adsorption on the battery cell through the suction cup 17 to complete the gripping; then the cylinder 16 retracts and the positions are readjusted by the first conveyor frame 13 and the second conveyor frame 14 to transfer the battery cell to the transfer platform 12; at this time, the motor 28 starts, and drives the rack 210 and the base plate 212 fixed thereto to move horizontally along the guide rail 213 through the gear, so that the adsorption seat 214 moves from above the stacking platform 25 to directly above the transfer platform 12; when the adsorption seat 214 is gripped by the suction cup 17 After the battery cells are aligned, they are attracted and fixed by the suction seat 214 through the suction holes on its lower side. Then, the motor 28 rotates in reverse, driving the suction seat 214 to return to the top of the stacking platform 25 with the battery cells. At the same time, the motor 26 drives the lead screw 22 to rotate, so that the lifting seat 24 descends smoothly along the guide rod 23, driving the stacking platform 25 down to the preset initial stacking height. After the suction seat 214 is in place, it releases the vacuum adsorption and accurately places the battery cells on the stacking platform 25. After one layer is placed, the motor 26 drives the lead screw 22 again to lower the stacking platform 25 by the thickness of one battery cell, preparing for the next layer to be stacked. The above cycle is repeated until the set number of stacking layers is reached.

[0039] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A multi-layer stacking and positioning device for lithium-ion battery processing, comprising a transfer assembly (1) and a stacking assembly (2) adjacent to the transfer assembly (1); characterized in that: The transfer assembly (1) includes a transfer frame (11), a transfer platform (12) fixed to the upper part of the transfer frame (11), a first conveyor frame (13) fixed to the top of the transfer frame (11), a second conveyor frame (14) installed on the upper part of the first conveyor frame (13), a bracket (15) mounted on the second conveyor frame (14), a cylinder (16) fixed to the outside of the bracket (15), and a suction cup (17) installed on the telescopic end of the cylinder (16). The stacking assembly (2) includes a stacking frame (21) fixed to the transfer frame (11), a lead screw (22) mounted on the middle position of the side of the stacking frame (21) via a shaft seat, a motor (26) for driving the lead screw (22), a lifting seat (24) cooperating with the lead screw (22), a stacking platform (25) fixed to the lifting seat (24), a crossbeam (27) fixed to the top of the stacking frame (21), a top plate (29) fixed to the lower part of the crossbeam (27), a motor (28) fixed to the upper part of the top plate (29), a rack (210) connected to the output end of the motor (28) via a gear, a base plate (212) fixed to the lower side of the rack (210), and an adsorption seat (214) fixed to the middle position of the lower side of the base plate (212).

2. The lithium-ion battery cell multilayer stacking and positioning device according to claim 1, characterized in that, Both the first conveyor frame (13) and the second conveyor frame (14) are equipped with conveyor belts. The conveyor belt in the first conveyor frame (13) is connected to the outer frame of the second conveyor frame (14), and the conveyor belt in the second conveyor frame (14) is connected to the support frame (15).

3. The lithium-ion battery cell multilayer stacking and positioning device according to claim 1, characterized in that, The motor (26) is fixed above the end of the crossbeam (27), and a guide rod (23) is provided between the lower end of the crossbeam (27) and the bottom of the stacking frame (21). The guide rod (23) passes through the side of the lifting seat (24).

4. The lithium-ion battery cell multilayer stacking and positioning device according to claim 3, characterized in that, The guide rods (23) are two in number and are symmetrically arranged on the left and right sides of the lead screw (22). The upper end of each guide rod (23) is fixed to the lower side of the crossbeam (27), and the lower end is fixed to the bottom of the stacking frame (21). The lifting seat (24) has a guide hole on its side that slides with the guide rod (23).

5. The lithium-ion battery cell multilayer stacking and positioning device according to claim 1, characterized in that, A slider (211) is fixed to the upper side of the base plate (212), and the slider (211) and the guide rail (213) fixed to the lower side of the top plate (29) form a sliding pair; There are two guide rails (213), which are fixed in parallel on the left and right sides of the lower side of the top plate (29). Each guide rail (213) is slidably engaged with the corresponding slider (211). The slider (211) is fixedly connected to the upper side of the bottom plate (212) by screws.

6. The lithium-ion battery cell multilayer stacking and positioning device according to claim 1, characterized in that, The height of the stacking platform (25) is lower than that of the transfer platform (12). The adsorption seat (214) is located above the stacking platform (25). The adsorption seat (214) can move back and forth above the transfer platform (12) and the stacking platform (25) by driving the rack (210) with the motor (28) to drive the base plate (212).

7. The lithium-ion battery cell multilayer stacking and positioning device according to claim 1, characterized in that, The adsorption seat (214) has a vacuum chamber inside, and a plurality of evenly distributed suction holes are opened on its lower side. The suction holes are connected to the vacuum chamber, and the upper side of the adsorption seat (214) is connected to an external vacuum pipeline through a flange joint.

8. The lithium-ion battery cell multilayer stacking and positioning device according to claim 1, characterized in that, The centerline of the adsorption seat (214) is collinear with the centerline of the stacking platform (25), and the minimum distance between the lower side of the adsorption seat (214) and the upper side of the stacking platform (25) is no more than twice the thickness of a single cell layer.

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