Stacking device and stacking machine

Abstract

This invention relates to a stacking device and a stacking machine. The stacking device includes a stacking table, two sets of pressing mechanisms, two horizontal moving mechanisms, and two vertical moving mechanisms. Each set of pressing mechanisms includes two pressing components located on the left and right sides of the stacking table. Each horizontal moving mechanism includes a moving base and a driving component. The two pressing components in each set of pressing mechanisms are slidably mounted on the corresponding moving base and move towards or away from each other under the drive of the driving component. The power output end of each vertical moving mechanism is connected to the corresponding moving base for driving the moving base to rise and fall. Each pressing component includes a tool holder, a pressing cylinder mounted on the tool holder, and a pressing blade fixed to the output end of the pressing cylinder. The pressing component is slidably connected to the corresponding moving base through the tool holder to obtain the power input for horizontally moving towards or away from each other. The pressing blade is used to contact the battery cells on the stacking table to press them firmly.

Description

Technical Field

[0001] This invention relates to the field of battery manufacturing equipment technology, and in particular to a stacking device and a stacking machine. Background Technology

[0002] Lithium-ion battery stacking technology is a lithium-ion battery manufacturing technology that uses a separator to isolate the positive and negative electrode sheets and stacks them sequentially to form a battery cell. Z-type stacking is a relatively important stacking method in lithium-ion batteries. Its basic principle and working process are as follows: the separator wound on it is released by an unwinding mechanism, and the separator is folded into a Z-shape by the reciprocating movement of the stacking table. At the same time, the positive and negative electrode sheets are alternately placed between the folded separator by a robotic arm, and the positive and negative electrode sheets are separated by the separator. The above process is repeated many times to finally form a lithium-ion battery cell with a certain thickness.

[0003] Typically, to improve cell stability during the stacking process, a pressing mechanism is installed on the stacking table. This mechanism holds the folded semi-finished cells in place, preventing them from scattering under tension changes due to the lack of fixing force, and also preventing displacement of the separator and positive / negative electrode sheets, thus ensuring stacking reliability. However, existing pressing mechanisms suffer from unstable pressing force magnitude and direction, and poor synchronization of the pressing actions of multiple pressing blades. This results in poor pressing stability and reliability of the cells, leading to inconsistent quality of the finished battery products. Summary of the Invention

[0004] The first objective of this invention is to provide a stacking device to solve the technical problem that existing cell stacking mechanisms have unstable pressure force magnitude and direction, poor synchronization of multiple pressing actions, resulting in poor pressing stability and reliability of the cells and poor quality consistency of the finished battery products.

[0005] The stacking device provided by the present invention includes a stacking table, two sets of pressing mechanisms, two horizontal moving mechanisms, and two vertical moving mechanisms. The two horizontal moving mechanisms are used to drive the two sets of pressing mechanisms to move horizontally in a one-to-one correspondence; the two vertical moving mechanisms are used to drive the two sets of pressing mechanisms to move vertically in a one-to-one correspondence.

[0006] Each set of pressing mechanisms includes two pressing components located on the left and right sides of the stacking table. Each horizontal moving mechanism is used to drive the two pressing components in the corresponding pressing mechanism to move towards each other or away from each other.

[0007] Each of the horizontal moving mechanisms includes a moving base and a driving component. Two of the pressing components in each group of pressing mechanisms are slidably mounted on the corresponding moving base and move towards or away from each other under the drive of the driving component.

[0008] The power output end of each of the vertical moving mechanisms is connected to the corresponding moving base, which is used to drive the moving base to rise and fall to drive the two pressing components set on the moving base to rise and fall, thereby pressing the battery cells on the stacking table.

[0009] Each of the pressing assemblies includes a tool holder, a pressing cylinder mounted on the tool holder, and a pressing blade fixed to the output end of the pressing cylinder; wherein, the pressing assembly is slidably connected to the corresponding movable seat through the tool holder to obtain a power input for horizontally moving towards or away from each other; the pressing blade is used to contact the battery cells on the stacking table to press them tightly;

[0010] During the stacking process, the stacking device reciprocates, and during the movement, the diaphragm is laid on the stacking table. When a pressing operation is required, the vertical moving mechanism drives the corresponding moving seat to move the knife holder downward, thereby achieving contact between the pressing knife and the battery cell on the stacking table.

[0011] Furthermore, each of the horizontal moving mechanisms includes a first shaft segment and a second shaft segment pivotally connected to the moving seat, and the driving component is used to drive the first shaft segment and the second shaft segment to rotate;

[0012] Both the first shaft segment and the second shaft segment extend horizontally and are threaded; the two pressing components of each pressing mechanism are respectively threaded to the first shaft segment and the second shaft segment of the corresponding horizontal moving mechanism.

[0013] Furthermore, the horizontal moving mechanism includes a first lead screw pivotally connected to the moving seat. The first lead screw extends in a horizontal direction and has threads with opposite directions at both ends. The two sections of the first lead screw with opposite threads respectively form the first shaft section and the second shaft section. The driving component includes a first driving member that is drivenly connected to the first lead screw.

[0014] The horizontal moving mechanism further includes a first transmission member fixedly connected to the tool holder of the corresponding pressing assembly. The first transmission member is threadedly connected to the first lead screw and slidably connected to the moving seat.

[0015] Furthermore, the horizontal moving mechanism also includes a first slide rail disposed on the moving base, the first slide rail being spaced apart from the first lead screw and extending in the horizontal direction, and the first transmission member being slidably connected to the first slide rail.

[0016] Furthermore, the threads on the first shaft segment and the second shaft segment have the same direction of rotation, and the driving component drives the first shaft segment and the second shaft segment to rotate in opposite directions.

[0017] Furthermore, it also includes a mounting base, on which the stacking stage is mounted.

[0018] Furthermore, the vertical moving mechanism includes a second driving member and a second lead screw disposed on the mounting base, wherein the second lead screw extends in the vertical direction, and the second driving member is throttledly connected to the second lead screw;

[0019] The movable seat is slidably connected to the mounting base, and the vertical moving mechanism further includes a second transmission component fixedly connected to the movable seat, the second transmission component being threadedly connected to the second lead screw.

[0020] Furthermore, the vertical moving mechanism also includes a second slide rail disposed on the mounting base, the second slide rail being spaced apart from the second lead screw and extending in the vertical direction, and the moving base being slidably connected to the second slide rail.

[0021] Furthermore, it also includes a lifting mechanism for raising and lowering the stacking table, the lifting mechanism being mounted on the mounting base.

[0022] Furthermore, the pressing end of the pressing knife is plate-shaped; when a pressing operation is required, under the action of the vertical moving mechanism, the moving seat drives the knife holder to move downward, thereby realizing the contact between the pressing knife and the battery cell on the stacking platform;

[0023] When the pressing knife contacts the battery cell on the stacking platform, the pressing cylinder always outputs a constant pulling force to the pressing knife, thereby causing the pressing knife to apply a constant downward pressure to the battery cell.

[0024] The beneficial effects of the stacking device of the present invention are:

[0025] When the stacking device is working, in each pressing mechanism, driven by the driving component in the horizontal moving mechanism, the pressing components on both sides of the stacking table move in opposite directions, thereby removing the pressing end of the pressing component from the battery cell and thus achieving repositioning relative to the battery cell. Then, the pressing component is raised a certain distance by the vertical moving mechanism, so that the pressing component is above the battery cell. After that, the driving component in the horizontal moving mechanism is used again to drive the pressing components on both sides to move towards each other until they can press the battery cell on the stacking table after they descend. Finally, the pressing component is driven to descend again by the vertical moving mechanism to press the battery cell on the stacking table.

[0026] After a new layer of the separator is laid out, the electrode sheet is placed in. Meanwhile, another set of pressing mechanisms, positioned opposite the aforementioned pressing mechanism in the front-back direction, releases the battery cell. After undergoing the same operational process as the pressing mechanism described above, the battery cell on that side is pressed firmly. Subsequently, the separator continues to lay out, the electrode sheet continues to be placed in, and the pressing mechanism on the other side continues to press the corresponding side of the battery cell according to the above operational process. This process is repeated continuously, achieving the pressing operation during the battery cell stacking process through multiple folds of the separator and multiple placements of the positive and negative electrode sheets. Each pressing mechanism pressing the battery cell can be one set or multiple sets.

[0027] In this stacking device, a vertical moving mechanism drives the pressing assemblies on both sides of the stacking table to rise or fall, causing the pressing blades of the pressing assemblies to separate from or contact the battery cells on the stacking table. When the vertical moving mechanism drives the pressing assemblies on both sides of the stacking table to fall until the pressing blades press the battery cells on the stacking table, the pressure applied by the pressing blades to the battery cells is provided by the pressing cylinder. Furthermore, two pressing assemblies in a set of pressing mechanisms are mounted on the same moving base. A horizontal moving mechanism drives the two pressing assemblies on the moving base to move towards or away from each other, and a vertical moving mechanism drives the moving base to rise and fall, thereby causing the two pressing assemblies on the moving base to rise and fall synchronously. This greatly improves the consistency of the pressing action (i.e., the towards or away movement of the two pressing blades and the rising and falling movement) of the two pressing blades of the same set of pressing assemblies. Therefore, by setting up a pressing cylinder, it is beneficial to control the pressure and direction of the pressing knife on the cell more consistently each time, avoiding instability in the pressure and direction of the pressing knife on the cell each time. By using the same horizontal moving mechanism to drive the two pressing components in a pressing mechanism to move in opposite directions or towards each other, and using the same vertical moving mechanism to drive the two pressing components in a pressing mechanism to move up and down synchronously, it is possible to avoid inconsistent pressing actions of the two pressing knives in the same pressing mechanism. This greatly improves the consistency, stability and reliability of pressing the cell, which is conducive to improving the quality consistency of the finished battery.

[0028] The second objective of this invention is to provide a stacking machine to solve the technical problem that existing stacking machines cannot meet the stacking operation requirements of various types of battery cells.

[0029] The stacking machine provided by the present invention includes the stacking device described above.

[0030] The beneficial effects of the stacking machine of this invention are:

[0031] By incorporating the aforementioned stacking device into the stacking machine, the stacking machine acquires all the advantages of the aforementioned stacking device, which will not be elaborated upon here. Attached Figure Description

[0032] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the front view structure of the stacking device provided in an embodiment of the present invention;

[0034] Figure 2 This is a front view schematic diagram of the stacking device provided in an embodiment of the present invention, with the stacking table and lifting mechanism not shown.

[0035] Figure 3 This is a top view of the stacking device provided in an embodiment of the present invention, with the stacking table and lifting mechanism not shown.

[0036] Figure 4 for Figure 1 A magnified view of a section at point A in the middle;

[0037] Figure 5 This is a schematic diagram of the movement path of the pressing knife and the battery cell during one stacking operation of the stacking device provided in this embodiment of the invention.

[0038] Figure label:

[0039] 100-Stacking table; 200-Pressure assembly; 300-Horizontal moving mechanism; 400-Vertical moving mechanism; 500-Lifting mechanism; 600-Mounting base; 700-Battery cell;

[0040] 210 - Pressure cutter; 220 - Tool holder; 230 - Material clamping cylinder;

[0041] 310 - First slide rail; 320 - First driving component; 330 - First lead screw; 340 - First transmission component; 350 - Moving seat; 360 - First transmission assembly;

[0042] 331 - First axle segment; 332 - Second axle segment;

[0043] 410 - Second slide rail; 420 - Second drive component; 430 - Second lead screw; 440 - Second transmission component; 450 - Mounting plate; 460 - Second transmission assembly;

[0044] 510-Lifting screw nut; 520-Lifting screw; 530-Sleeve; 540-Bearing housing; 550-Guide rail; 560-Support frame;

[0045] 710 - Diaphragm; 720 - Electrode;

[0046] S1 - The distance of the first upward movement of the pressing tool;

[0047] S2 - Second upward movement distance of the pressing tool;

[0048] H - The distance the stacking stage descends each time. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0050] In the description of this invention, it should be noted that the terms "upper," "lower," "horizontal," and "vertical," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are merely for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0051] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection," "installation," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0052] Figure 1 This is a schematic diagram of the front view structure of the stacking device provided in this embodiment. Figure 2 This is a front view of the stacking device provided in this embodiment, where the stacking stage 100 and lifting mechanism 500 are not shown. Figure 3 This is a top view of the stacking apparatus provided in this embodiment, excluding the stacking table 100 and the lifting mechanism 500. Figures 1 to 3 As shown, this embodiment provides a stacking device, including a stacking table 100, a pressing mechanism, a horizontal moving mechanism 300, and a vertical moving mechanism 400. The stacking table 100 is mounted on a mounting base 600.

[0053] Specifically, please continue to refer to Figures 1 to 3The pressing mechanism includes pressing assemblies 200 located on the left and right sides of the stacking table 100. The horizontal moving mechanism 300 includes a moving seat 350, a first shaft segment 331 and a second shaft segment 332 pivotally connected to the moving seat 350, and a driving component for driving the first shaft segment 331 and the second shaft segment 332 to rotate. The first shaft segment 331 and the second shaft segment 332 both extend in the horizontal direction and are both provided with threads. Each pressing assembly 200 is threadedly connected to the first shaft segment 331 and the second shaft segment 332 respectively, and is slidably connected to the moving seat 350 so as to move towards each other or away from each other under the drive of the driving component.

[0054] Please continue to refer to Figures 1 to 3 The power output end of the vertical moving mechanism 400 is connected to the moving base 350, which drives the moving base 350 to rise and fall, thereby driving the pressing assembly 200 to rise and fall, and thus pressing the battery cells 700 on the stacking table 100. There are two sets of pressing mechanisms, specifically, the two sets of pressing mechanisms are arranged at intervals along the front-to-back direction. The number of horizontal moving mechanisms 300 is the same as the number of pressing mechanisms, which are used to drive each set of pressing mechanisms to move in the horizontal direction; the number of vertical moving mechanisms 400 is also the same as the number of pressing mechanisms, which are used to drive each set of pressing mechanisms to move in the vertical direction.

[0055] When the stacking device is working, in a set of pressing mechanisms, driven by the driving component in the horizontal moving mechanism 300, the first shaft segment 331 and the second shaft segment 332 rotate. Under the helical transmission between the first shaft segment 331 / second shaft segment 332 and the pressing assembly 200, and the sliding limit action of the moving seat 350 on the pressing assembly 200, the rotational motion of the first shaft segment 331 and the second shaft segment 332 is converted into the linear feed motion of the pressing assemblies 200 on both sides, so that the pressing assemblies 200 located on both sides of the stacking table 100 move in opposite directions, thereby causing the pressing end of the pressing assembly 200 to move away from the cell 700, and thus realize relative to the cell 700. The pressure assembly 200 is raised a certain distance using the vertical moving mechanism 400, so that the pressure assembly 200 is positioned above the battery cell 700. Then, the driving component in the horizontal moving mechanism 300 is used again to drive the first shaft segment 331 and the second shaft segment 332 to rotate in the opposite direction to their respective rotation directions, so that the pressure assemblies 200 on both sides move towards each other until they can press the battery cell 700 on the stacking table 100 after they descend. Finally, the vertical moving mechanism 400 is used again to drive the pressure assembly 200 to descend and press the battery cell 700 on the stacking table 100.

[0056] After the separator 710 spreads out a new layer, the electrode 720 is placed in. Then, another set of pressing mechanisms, which is arranged opposite to the aforementioned pressing mechanism in the front-back direction, releases the battery cell 700. After the same operation process as the pressing mechanism, the battery cell on that side is pressed. Subsequently, the separator 710 continues to spread out, the electrode 720 continues to be placed in, and the pressing mechanism on the other side continues to press the corresponding side of the battery cell 700 according to the above operation process. The above operation is repeated continuously. During the multiple folding of the separator 710 and the multiple placement of the electrode 720, the pressing operation of the battery cell 700 during the stacking process is realized.

[0057] In this stacking device, the linear feeding of the pressing components 200 on both sides of the stacking table 100 is achieved by utilizing the helical transmission of the horizontal moving mechanism 300. Not only is the feeding stroke controllable, but the feeding stroke is also relatively long, thereby expanding the applicability of the stacking device and enabling it to meet the stacking requirements of various types of battery cells 700. The degree of versatility is greatly improved, and the stacking cost of finished battery cells is reduced to a certain extent.

[0058] It should be noted that in this embodiment, "horizontal direction" refers to the direction of movement of each pressing component 200 in each group of pressing mechanisms in the horizontal plane, including the directions in which the pressing components 200 move towards each other and the directions in which they move away from each other; "front-back direction" refers to the direction in the horizontal plane that is perpendicular to the direction of movement of the pressing components 200, that is: Figure 3 The direction indicated by the arrow mn. Furthermore, "the left and right sides of the stacking stage 100" refers to the two sides of the stacking stage 100 along the moving direction of the pressing assembly 200.

[0059] It should also be noted that when the number of pressing mechanisms is greater than two sets, there can be more than two sets of pressing mechanisms pressing the cell each time. This arrangement ensures that the portion of the cell 700 near the center is pressed simultaneously during the stacking process. This double pressing method prevents the cell 700 from becoming loose due to the failure of one set of pressing mechanisms, thus ensuring the reliability of the stacking device in this embodiment.

[0060] Please continue to refer to Figure 1 In this embodiment, the stacking device may further include a mounting base 600, wherein the stacking stage 100 is mounted on the mounting base 600. This arrangement ensures reliable installation of the stacking stage 100, provides a stable working environment for the stacking of the battery cells 700, and guarantees the reliability of the stacking. Moreover, this arrangement also achieves modularity of the stacking device in this embodiment, facilitating its assembly and fixation in the stacking machine.

[0061] Please continue to refer to Figures 1 to 3In this embodiment, the pressing assembly 200 includes a tool holder 220, a pressing cylinder 230 mounted on the tool holder 220, and a pressing knife 210 fixedly connected to the output end of the pressing cylinder 230. The pressing assembly 200 is threadedly connected to the first shaft segment 331 / second shaft segment 332 through the tool holder 220 and slidably connected to the moving seat 350 through the tool holder 220. The pressing knife 210 is used to contact the battery cell 700 on the stacking stage 100 to press it.

[0062] When a pressing operation is required, the vertical moving mechanism 400 drives the moving seat 350 to move the tool holder 220 downward, thereby achieving contact between the pressing tool 210 and the battery cell 700 on the stacking table 100. The pressing cylinder 230 operates, continuously outputting a constant pulling force to the pressing tool 210, thus applying a constant downward pressure to the battery cell 700 to complete the pressing action.

[0063] Specifically, in this embodiment, the pressing cylinder 230 can be a slide cylinder.

[0064] By setting up the pressing cylinder 230, the pressing knife 210 can apply a constant pressure to the battery cell 700 each time. Furthermore, by using a sliding table cylinder as the pressing cylinder 230 to apply pressure to the battery cell 700, the vertical guiding effect of the sliding table ensures that the pulling force provided by the pressing cylinder 230 to the pressing knife 210 is always vertical and does not wobble, guaranteeing the consistency of the stacked battery cells 700 and thus improving the consistency of the finished lithium battery to a certain extent. Moreover, this pressing structure has high clamping reliability, ensuring the smooth progress of the stacking operation.

[0065] It should be noted that in this embodiment, the pressing assembly 200 can be in the form of applying pressure to the battery cell 700 via the pressing cylinder 230 as described above, but it is not limited to this. Other configurations can also be used, such as placing a tension spring between the tool holder 220 and the pressing blade 210. When the pressing blade 210 contacts the battery cell 700 on the stacking table 100, the tension spring is in a stretched state, and under its elastic restoring force, the battery cell 700 on the stacking table 100 is pressed tightly. Therefore, as long as the pressing assembly 200 can achieve the pressing operation of the battery cell 700 on the stacking table 100, it is acceptable.

[0066] Please continue to refer to Figures 1 to 3 In this embodiment, the pressing end of the pressing knife 210 is plate-shaped and has rounded corners to prevent scratching the battery cell 700.

[0067] By setting the pressure knife 210 to a sheet shape, the contact area between the pressure knife 210 and the battery cell 700 is increased, preventing local warping of the battery cell 700 and thus improving the stacking effect. Furthermore, when the separator 710 is folded again, this sheet-shaped pressure knife 210 configuration reduces the height difference between the electrode 720 and the separator 710, thereby reducing the possibility of the separator 710 becoming too long after folding due to the height of the pressure knife 210. This not only avoids waste of separator 710 material but also ensures the flatness of the battery cell 700 between adjacent electrode 720s after stacking, further improving the stacking effect.

[0068] Furthermore, by setting the pressing end of the pressing knife 210 to a rounded corner, not only is damage to the diaphragm 710 or electrode 720 prevented during the extraction of the pressing knife 210, but the resistance during the extraction of the pressing knife 210 is also reduced, making it easier for the pressing knife 210 to be extracted quickly, thereby improving the working efficiency of the stacking device in this embodiment to a certain extent.

[0069] Please continue to refer to Figures 1 to 3 In this embodiment, the horizontal moving mechanism 300 may include a first lead screw 330 pivotally connected to the moving seat 350. The first lead screw 330 extends horizontally and has threads with opposite directions of rotation at both ends. The two sections of the first lead screw 330 with opposite threads of rotation respectively form a first shaft section 331 and a second shaft section 332. The driving component includes a first driving member 320 that is pulverically connected to the first lead screw 330. Furthermore, the horizontal moving mechanism 300 also includes a first transmission member 340 fixedly connected to the tool holder 220. The first transmission member 340 connected to each tool holder 220 is threadedly connected to both ends of the first lead screw 330 and slidably connected to the moving seat 350.

[0070] When the first driving member 320 drives the first lead screw 330 to rotate, under the helical transmission between the first transmission member 340 and the first lead screw 330 and the sliding limit action of the moving seat 350 on the first transmission member 340, the helical transmission between the first transmission member 340 and the first lead screw 330 is converted into the linear feed motion of the first transmission member 340, so that the tool holders 220 set at both ends of the first lead screw 330 move towards or away from each other at the same time, so as to realize that the two are simultaneously approaching or moving away from the stacking table 100.

[0071] This configuration allows one drive component to simultaneously drive the movement of two pressing assemblies 200, reducing the setup cost of the horizontal moving mechanism 300. Furthermore, this transmission method ensures smooth operation, minimizing adverse effects on the stacking process and further improving the reliability of the stacking device in this embodiment.

[0072] Please continue to refer to Figure 1 and Figure 2In this embodiment, the horizontal moving mechanism 300 may further include a first slide rail 310 disposed on the moving seat 350. Specifically, the first slide rail 310 is spaced apart from the first lead screw 330 and extends in the horizontal direction, and the first transmission member 340 is slidably connected to the first slide rail 310.

[0073] When the first driving member 320 drives the pressing assemblies 200 on both sides to move towards or away from each other in the horizontal direction, the first transmission member 340 slides on the first slide rail 310.

[0074] By setting the first slide rail 310, the first transmission component 340 is slidably connected to the moving seat 350, thereby enabling the horizontal movement of the tool holder 220. Furthermore, this arrangement of the first slide rail 310 is simple in structure, easy to implement, and low in cost.

[0075] Please continue to refer to Figure 1 and Figure 2 In this embodiment, the horizontal moving mechanism 300 may further include a first transmission component 360, wherein the first driving component 320 is connected to the first lead screw 330 through the first transmission component 360.

[0076] The first transmission assembly 360 enables the power transmission from the first driving member 320 to the first lead screw 330. This not only satisfies the various installation requirements of the first driving member 320, making the stacking device in this embodiment more compact and saving floor space, but also, by selecting the appropriate type of the first transmission assembly 360, achieves the purpose of speed reduction and torque increase, ensuring reliable driving of the first lead screw 330.

[0077] Specifically, in this embodiment, the first driving component 320 can be a servo motor, and the first transmission assembly 360 can be a belt drive assembly. The belt drive assembly includes a driving pulley fixedly connected to the output shaft of the servo motor, a driven pulley fixedly sleeved on the first lead screw 330, and a transmission belt sleeved on the driving pulley and the driven pulley. When the output shaft of the servo motor rotates, it drives the driving pulley to rotate, thereby outputting power to the driven pulley through the transmission belt, and ultimately driving the first lead screw 330.

[0078] The method of power transmission using belt drive components is not only simple in structure and easy to assemble, but also requires almost no lubrication, thereby reducing the contamination of the diaphragm 710 and the electrode 720 by lubricant.

[0079] It should be noted that in this embodiment, the first shaft segment 331 and the second shaft segment 332 in the horizontal moving mechanism 300 can be in the form of setting opposite threads at both ends of a first lead screw 330 as described above, but it is not limited to this. Other configuration forms can also be adopted, such as: the first shaft segment 331 and the second shaft segment 332 are two independent shaft segments, and they have threads with the same direction of rotation. The driving component drives the first shaft segment 331 and the second shaft segment 332 to rotate in opposite directions, thereby realizing the opposite or opposite movement of the pressing assemblies 200 on both sides of the stacking table 100.

[0080] Specifically, when the threads on the first shaft segment 331 and the second shaft segment 332 have the same direction of rotation, the first shaft segment 331 and the second shaft segment 332 can be coaxially arranged and spaced apart along the axial direction. In this case, the driving component may include a first bevel gear fixedly sleeved on the first shaft segment 331, a second bevel gear fixedly sleeved on the second shaft segment 332, a power bevel gear that meshes with the first bevel gear and the second bevel gear simultaneously, and a motor for driving the rotation of the aforementioned power bevel gear. The motor is mounted on the movable base 350. When the motor rotates, the power bevel gear rotates, thereby driving the first bevel gear and the second bevel gear meshing with it to rotate, thereby realizing the opposite rotation of the first shaft segment 331 and the second shaft segment 332.

[0081] Of course, the driving of the first shaft segment 331 and the second shaft segment 332 can also be achieved by other driving components, as long as the arrangement of such driving components can enable the first shaft segment 331 and the second shaft segment 332 to rotate in opposite directions. This embodiment does not limit the specific form of the driving component.

[0082] Please continue to refer to Figures 1 to 3 In this embodiment, the vertical moving mechanism 400 may include a second driving member 420 and a second lead screw 430 disposed on the mounting base 600, wherein the second driving member 420 is throttle-connected to the second lead screw 430, and the second lead screw 430 extends in the vertical direction. Furthermore, the movable base 350 is slidably connected to the mounting base 600, and the vertical moving mechanism 400 also includes a second transmission member 440 fixedly connected to the movable base 350, and the second transmission member 440 is threadedly connected to the second lead screw 430.

[0083] When the second driving member 420 drives the second lead screw 430 to rotate, under the helical transmission between the second transmission member 440 and the second lead screw 430 and the sliding limit action of the mounting seat 600 on the second transmission member 440, the helical transmission between the second transmission member 440 and the second lead screw 430 is converted into the linear feed motion of the second transmission member 440, thereby realizing the rising or falling motion of the moving seat 350, and thus realizing the rising or falling motion of the pressing assembly 200.

[0084] This transmission method allows for adjustment of the upward or downward stroke of the pressing assembly 200 according to actual needs, thereby meeting the stacking requirements of various cell models 700. Furthermore, this transmission method is smooth and reliable, reducing vibration and noise during the operation of the stacking device in this embodiment.

[0085] Specifically, the second drive unit 420 is connected to the mounting base 600 via the mounting plate 450.

[0086] Please continue to refer to Figures 1 to 3 In this embodiment, the vertical moving mechanism 400 may also include a second slide rail 410 disposed on the mounting base 600. Specifically, the second slide rail 410 is spaced apart from the second lead screw 430 and extends in the vertical direction, and the moving base 350 is slidably connected to the second slide rail 410.

[0087] When the second drive unit 420 drives the movable seat 350 to rise or fall, the movable seat 350 slides on the second slide rail 410.

[0088] By setting the second slide rail 410, the sliding connection between the movable seat 350 and the mounting seat 600 is realized, that is, the sliding connection between the second transmission component 440 and the mounting seat 600 is achieved. With the help of the screw 430 and the screw drive of the second transmission component 440, the movement of the movable seat 350 in the vertical direction is realized.

[0089] Please continue to refer to Figure 1 and Figure 2 In this embodiment, there can be two second slide rails 410, and the two second slide rails 410 are spaced apart along the length direction (left-right direction in the figure) of the movable seat 350. This arrangement enables simultaneous sliding connection between both ends of the movable seat 350 and the mounting base 600, preventing stress concentration on one side of the second slide rail 410 due to suspension at one end and jamming caused by large overturning forces on the movable seat 350, thereby ensuring the smoothness of the lifting and lowering of the movable seat 350.

[0090] Specifically, a slider adapted to the second slide rail 410 can be fixedly installed on the movable base 350. By utilizing the sliding engagement between the slider and the second slide rail 410, the movable base 350 can be slidably connected to the mounting base 600.

[0091] Please continue to refer to Figure 1 and Figure 2 In this embodiment, the vertical moving mechanism 400 may further include a second transmission assembly 460, wherein the second driving member 420 is connected to the second lead screw 430 through the second transmission assembly 460.

[0092] The second transmission assembly 460 enables the power transmission from the second drive member 420 to the second lead screw 430. This not only satisfies the various installation requirements of the second drive member 420, making the stacking device in this embodiment more compact and saving floor space, but also, by selecting the appropriate type of the second transmission assembly 460, achieves the purpose of speed reduction and torque increase, ensuring reliable driving of the second lead screw 430.

[0093] Specifically, in this embodiment, the second driving component 420 can be a servo motor, and the second transmission assembly 460 can be a belt drive assembly. The belt drive assembly includes a driving pulley fixedly connected to the output shaft of the servo motor, a driven pulley fixedly sleeved on the second lead screw 430, and a transmission belt sleeved on the driving pulley and the driven pulley. When the output shaft of the servo motor rotates, it drives the driving pulley to rotate, thereby outputting power to the driven pulley through the transmission belt, and ultimately driving the second lead screw 430.

[0094] The method of power transmission using belt drive components is not only simple in structure and easy to assemble, but also requires almost no lubrication, thereby reducing the contamination of the diaphragm 710 and the electrode 720 caused by lubricant.

[0095] Please continue to refer to Figure 1 In this embodiment, the stacking device may further include a lifting mechanism 500 for raising and lowering the stacking table 100, wherein the lifting mechanism 500 is mounted on the mounting base 600.

[0096] During the stacking process of the stacking device, after each fold of the diaphragm 710, the lifting mechanism 500 can drive the stacking table 100 to descend a certain distance, so that the highest surface on the stacking table 100 on which the battery cell 700 is placed can always be in the same plane position, thereby ensuring the reliability and consistency of the pressing component 200 pressing the battery cell 700, and thus ensuring the stacking effect.

[0097] It should be noted that in this embodiment, "the highest surface on the stacking stage 100 where the battery cell 700 is placed" refers to the highest surface of the two as a whole after the battery cell 700 is placed on the stacking stage 100, that is, the surface where the top layer of the battery cell 700 is located; while "the same plane position" refers to the same plane position as the stacking stage 100 when the battery cell 700 is not placed.

[0098] Figure 4 for Figure 1 A magnified view of a section at point A. Please continue referring to this. Figure 1 and combined Figure 4In this embodiment, the lifting mechanism 500 includes a bearing seat 540, a lifting nut 510, a lifting screw 520, a sleeve 530, and a support frame 560. Specifically, the bearing seat 540 is fixedly connected to the mounting base 600, and guide rails 550 are provided on both sides of the bearing seat 540. The support frame 560 is slidably connected to the guide rails 550, and the stacking platform 100 is fixedly mounted on the support frame 560. The lifting nut 510 is threadedly connected to the lifting screw 520, wherein the lifting screw 520 is driven to rotate by a lifting drive component (not shown in the figure). The sleeve 530 is sleeved on the lifting screw 520, and its lower end is fixedly connected to the lifting nut 510, and its upper end is fixedly connected to the support frame 560.

[0099] When the stacking table 100 needs to be raised or lowered, the lifting drive is activated to rotate the lifting screw 520. Under the helical transmission of the lifting screw 520 and the lifting nut 510, and the sliding limit action of the guide rail 550, the lifting nut 510 rises or falls. Since the length of the sleeve 530 between the lifting nut 510 and the support frame 560 is fixed, the sleeve 530 drives the support frame 560 to rise or fall during the movement of the lifting nut 510, thereby realizing the raising or lowering of the stacking table 100.

[0100] Figure 5 This is a schematic diagram showing the movement path of the pressing knife 210 and the battery cell 700 during one stacking operation of the stacking device provided in this embodiment. Please continue to refer to... Figure 3 and combined Figure 5After the diaphragm 710 is laid out from n to m along the stacking table 100, the transport mechanism places the electrode 720 on the diaphragm 710. After the electrode 720 is in place, the vertical moving mechanism 400 drives the two pressure knives 210 on the m side to rise (the path of the pressure knives 210 is a) to move slightly away from the electrode 720 below them. Specifically, the stroke of the pressure knives 210 rising can be S1. The horizontal moving mechanism 300 drives the two pressure knives 210 on the m side to move in opposite directions (the path of the pressure knives 210 is b) to remove the pressure knives 210 from the cell 700. The lifting mechanism 500 drives the stacking table 100 to descend a certain stroke (the path of the cell 700 is f). Specifically, the stroke of the stacking table 100 descending can be H to ensure that the cell is placed after the next stacking operation. The highest surface of the stacking table 100 of 700 is always on the same plane; the vertical moving mechanism 400 drives the two pressing knives 210 on the m side to rise again (the path of the pressing knives 210 is c). Specifically, the stroke of the pressing knives 210 this time can be S2 to ensure that the pressing end of the pressing knives 210 is high enough above the highest surface of the stacking table 100 on which the battery cell 700 is placed, so as to achieve avoidance; the horizontal moving mechanism 300 moves again, so that the two pressing knives 210 on the m side move towards each other (the path of the pressing knives 210 is d), so that the pressing knives 210 reach the pressing position for pressing the battery cell 700; the vertical moving mechanism 400 moves again, driving the two pressing knives 210 on the m side to fall (the path of the pressing knives 210 is e), pressing the battery cell 700 that has completed one stacking operation.

[0101] During the movement of the m-side pressing blade 210, the n-side pressing blade 210 remains stationary. Under the action of the pressing cylinder 230, the n-side pressing cylinder 230 applies a constant pulling force to the pressing blade 210, thereby applying a constant pressure to the battery cell 700 to reliably press the battery cell 700 onto the stacking table 100. After the m-side pressing blade 210 completes the pressing action, a new layer of diaphragm 710 is laid along the stacking table 100 from the m-side to the n-side. Then, the transport mechanism places the electrode 720 with the opposite polarity to the aforementioned electrode 720 onto the diaphragm 710. The n-side pressing blade 210 repeats the working process of the m-side pressing blade 210, pressing the end of the battery cell 700 located on the n-side again. This cyclical movement of the m-side and n-side pressing blades ultimately achieves the stacking operation of the battery cell 700.

[0102] Specifically, when the pressure cutter 210 descends along path e, its descent stroke is the sum of S1 and S2, where S1 can be less than S2. In this embodiment, the main purpose of the upward stroke S1 of the pressure cutter 210 is to prevent the pressure cutter 210 from scratching the battery cell 700 during the extraction process; the main purpose of the upward stroke S2 ​​of the pressure cutter 210 is to achieve the avoidance of the battery cell 700 on the stacking stage 100.

[0103] It should be noted that in this embodiment, "one-time folding" refers to: the diaphragm 710 being folded once from the m side to the n side (or from the n side to the m side), and an electrode 720 being placed on the diaphragm 710. That is, H is equal to the sum of the thickness of one layer of diaphragm 710 and one electrode 720.

[0104] It should also be noted that, in this embodiment, the pressing blades 210 on the m and n sides can press the battery cell 700 at its end during the pressing process. This arrangement ensures that the diaphragm 710 to be folded will not be pulled by the next folding action, and at the same time, it also ensures that the battery cell 700 after folding will not loosen or deform, further improving the stacking effect of the stacking device in this embodiment.

[0105] This embodiment also provides a stacking machine, including the stacking device described above.

[0106] By incorporating the aforementioned stacking device into the stacking machine, the stacking machine acquires all the advantages of the aforementioned stacking device, which will not be elaborated upon here.

[0107] Specifically, the stacking machine may also include a control module, which is electrically connected to the first drive unit 320, the second drive unit 420, and the lifting drive unit. This configuration enables automatic stacking of the cells, thereby improving the stacking efficiency of the battery cell 700.

[0108] In addition, the stacking machine may also include a conveying mechanism for transporting the electrode 720 and an unwinding mechanism for releasing the diaphragm 710, wherein the driving components of the conveying mechanism and the unwinding mechanism may both be electrically connected to the control module.

[0109] During the stacking process, the stacking device can be fixed while the unwinding mechanism drives the diaphragm 710 to reciprocate, thereby realizing the stacking operation on the stacking table 100; or the stacking device can reciprocate while the unwinding mechanism remains stationary, and the stacking table 100 can receive the diaphragm released by the unwinding mechanism to realize the stacking operation.

[0110] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A stacking device, characterized in that, It includes a stacking table (100), two sets of pressing mechanisms, two horizontal moving mechanisms (300) and two vertical moving mechanisms (400). The two horizontal moving mechanisms (300) are used to drive the two sets of pressing mechanisms to move horizontally in a one-to-one correspondence; the two vertical moving mechanisms (400) are used to drive the two sets of pressing mechanisms to move vertically in a one-to-one correspondence. Each set of pressing mechanisms includes two pressing components (200) located on the left and right sides of the stacking table (100), and each horizontal moving mechanism (300) is used to drive the two pressing components (200) in the corresponding pressing mechanism to move towards each other or away from each other; Each of the horizontal moving mechanisms (300) includes a moving seat (350) and a driving component. Two of the pressing components (200) in each group of pressing mechanisms are slidably disposed on the corresponding moving seat (350) and move toward each other or away from each other under the drive of the driving component. The power output end of each of the vertical moving mechanisms (400) is connected to the corresponding moving base (350) to drive the moving base (350) to rise and fall, thereby driving the two pressing assemblies (200) set on the moving base (350) to rise and fall, thereby pressing the battery cells (700) on the stacking table (100). Each of the pressing assemblies (200) includes a tool holder (220), a pressing cylinder (230) mounted on the tool holder (220), and a pressing blade (210) fixedly connected to the output end of the pressing cylinder (230); wherein, the pressing assembly (200) is slidably connected to the corresponding moving seat (350) through the tool holder (220) to obtain a power input for horizontally moving towards or away from each other; the pressing blade (210) is used to contact the battery cell (700) on the stacking table (100) to press it; During the stacking process, the stacking device reciprocates and the diaphragm is laid on the stacking table (100) during the movement. When a pressing operation is required, the vertical moving mechanism (400) drives the corresponding moving seat (350) to move the knife holder (220) downward, thereby achieving contact between the pressing knife (210) and the battery cell (700) on the stacking table (100). Under the driving action of the two horizontal moving mechanisms (300) and the two vertical moving mechanisms (400), when the two pressing knives (210) of any one set of pressing mechanisms move horizontally or vertically, the two pressing knives (210) of the other set of pressing mechanisms press the battery cell (700) on the stacking table (100).

2. The stacking device according to claim 1, characterized in that, Each of the horizontal moving mechanisms (300) includes a first shaft segment (331) and a second shaft segment (332) pivotally connected to the moving base (350), and the driving component is used to drive the first shaft segment (331) and the second shaft segment (332) to rotate; The first shaft segment (331) and the second shaft segment (332) both extend in the horizontal direction and are both provided with threads; the two pressing components (200) of each pressing mechanism are respectively threaded to the first shaft segment (331) and the second shaft segment (332) of the corresponding horizontal moving mechanism (300).

3. The stacking device according to claim 2, characterized in that, The horizontal moving mechanism (300) includes a first lead screw (330) pivotally connected to the moving seat (350). The first lead screw (330) extends in a horizontal direction and has threads with opposite directions of rotation at both ends. The two sections of the first lead screw (330) with opposite threads of rotation respectively form the first shaft section (331) and the second shaft section (332). The driving component includes a first driving member (320) that is pulverically connected to the first lead screw (330). The horizontal moving mechanism (300) further includes a first transmission member (340) fixedly connected to the tool holder (220) of the corresponding pressing assembly (200), the first transmission member (340) being threadedly connected to the first lead screw (330) and slidably connected to the moving seat (350).

4. The stacking device according to claim 3, characterized in that, The horizontal moving mechanism (300) further includes a first slide rail (310) disposed on the moving seat (350), the first slide rail (310) being spaced apart from the first lead screw (330) and extending in the horizontal direction, and the first transmission member (340) being slidably connected to the first slide rail (310).

5. The stacking device according to claim 2, characterized in that, The threads on the first shaft segment (331) and the second shaft segment (332) have the same direction of rotation, and the driving component drives the first shaft segment (331) and the second shaft segment (332) to rotate in opposite directions.

6. The stacking apparatus according to any one of claims 1-5, characterized in that, It also includes a mounting base (600), on which the stacking stage (100) is mounted.

7. The stacking apparatus according to claim 6, characterized in that, The vertical moving mechanism (400) includes a second driving member (420) and a second lead screw (430) disposed on the mounting base (600), wherein the second lead screw (430) extends in the vertical direction, and the second driving member (420) is connected to the second lead screw (430) in a transmission connection. The movable seat (350) is slidably connected to the mounting seat (600), and the vertical moving mechanism (400) further includes a second transmission member (440) fixedly connected to the movable seat (350), and the second transmission member (440) is threadedly connected to the second lead screw (430).

8. The stacking apparatus according to claim 7, characterized in that, The vertical moving mechanism (400) further includes a second slide rail (410) disposed on the mounting base (600). The second slide rail (410) is spaced apart from the second lead screw (430) and extends in the vertical direction. The moving base (350) is slidably connected to the second slide rail (410).

9. The stacking apparatus according to claim 6, characterized in that, It also includes a lifting mechanism (500) for raising and lowering the stacking table (100), the lifting mechanism (500) being mounted on the mounting base (600).

10. The stacking apparatus according to claim 1, characterized in that, The pressing end of the pressing knife is plate-shaped; when pressing operation is required, under the action of the vertical moving mechanism (400), the moving seat (350) drives the knife holder (220) to move downward, thereby realizing the contact between the pressing knife (210) and the battery cell (700) on the stacking table (100); When the pressing knife (210) contacts the battery cell (700) on the stacking table (100), the pressing cylinder (230) always outputs a constant pulling force to the pressing knife (210), thereby causing the pressing knife (210) to apply a constant downward pressure to the battery cell (700).

11. A stacking machine, characterized in that, Includes the stacking device according to any one of claims 1-10.

12. The stacking machine according to claim 11, characterized in that, The stacking machine includes a transport mechanism for placing the electrode sheets on a diaphragm laid on the stacking table (100).

13. The stacking machine according to claim 11, characterized in that, The stacking machine also includes an unwinding mechanism for releasing the diaphragm to the stacking table (100).

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