Lamination device

Abstract

The utility model relates to the technical field of lamination equipment, and discloses a lamination device which comprises at least two flattening mechanisms, a lamination table and a battery cell lifting mechanism, the output end of the battery cell lifting mechanism is connected with the lamination table, so that the working plane position of the lamination is fixed; the at least two flattening mechanisms are arranged on the two opposite sides of the lamination table, each flattening mechanism comprises a flattening piece and an XZ-axis assembly, and the output end of each XZ-axis assembly is connected with one flattening piece so as to flatten the diaphragms on the lamination table. At least two flattening mechanisms are arranged, and the positions of flattening pieces are adjusted from the horizontal direction and the vertical direction through an X-Z axis assembly, so that the left side and the right side of the diaphragm can be better pressed, and a better pressing effect is achieved; and by combining the lifting effect of the battery cell lifting mechanism, the movement stroke of the flattening piece is fixed, and the stability during downward pressing is better, so that the lamination can be effectively prevented from wrinkling, the alignment degree of the pole pieces is ensured, the service life and the energy density of the battery are ensured, and safety accidents are avoided.

Description

Technical Field

[0001] This utility model belongs to the technical field of stacking equipment, and specifically relates to a stacking device. Background Technology

[0002] Lithium-ion batteries, currently the mainstream battery with high energy density and long lifespan, will undoubtedly continue to dominate the market for a long time to come. The manufacturing process of lithium-ion batteries utilizes integrated cutting and stacking machines.

[0003] One of the technical challenges of current integrated cutting and stacking machines on the market is the stacking of electrodes. During stacking, positive electrode sheets, negative electrode sheets, and separators need to be stacked to form a structure of one layer of separator and one layer of positive electrode sheet, and one layer of separator and one layer of negative electrode sheet. Therefore, if wrinkles appear in the separator during the stacking process, the alignment between the electrodes will not meet the corresponding precision requirements. This will not only seriously affect the battery's lifespan and energy density, but may also potentially cause safety accidents. Utility Model Content

[0004] To address the shortcomings of the prior art, this utility model provides a stacking device.

[0005] The technical effects to be achieved by this utility model are realized through the following technical aspects:

[0006] A stacking device includes: at least two flattening mechanisms, a stacking table, and a cell lifting mechanism for driving the stacking table to rise or fall;

[0007] The output end of the cell lifting mechanism is connected to the stacking table so that the working plane position of the stacking is fixed.

[0008] At least two of the flattening mechanisms are disposed on opposite sides of the stacking table. Each flattening mechanism includes a flattening member and an XZ axis assembly for driving the flattening member toward or away from the stacking table in a horizontal and vertical direction. The output end of each XZ axis assembly is connected to one of the flattening members to flatten the diaphragm on the stacking table.

[0009] In some embodiments, in each of the flattening mechanisms, the number of the XZ axis assemblies and the number of the flattening elements are set to at least two.

[0010] In some embodiments, the XZ axis assembly includes an X-axis unit and a Z-axis unit, the output end of the X-axis unit is connected to the Z-axis unit, and the output end of the Z-axis unit is connected to the flattening member.

[0011] In some embodiments, the X-axis unit includes an X-axis linear motor and an X-axis slide rail. The output end of the X-axis linear motor is connected to the Z-axis unit, and the Z-axis unit is slidably disposed on the X-axis slide rail to move closer to or further away from the stacking stage.

[0012] In some embodiments, the flattening member is provided with a pressure sensor for detecting the downward pressure value of the flattening member.

[0013] In some embodiments, the flattening member is configured as a pressure claw.

[0014] In some embodiments, the cell lifting mechanism includes a cell lifting linear motor, the output end of which is connected to the stacking table.

[0015] In some embodiments, the system further includes a frame and a stacking lifting mechanism for driving the frame to rise or fall, wherein the cell lifting mechanism and each of the flattening mechanisms are disposed on the frame, and the output end of the stacking lifting mechanism is connected to the frame.

[0016] In some embodiments, the stacking platform lifting mechanism includes a stacking platform lifting linear motor and a stacking platform lifting slide rail. The output end of the stacking platform lifting linear motor is connected to the frame, and the frame is slidably mounted on the stacking platform lifting slide rail.

[0017] In some embodiments, a pressing mechanism is further included, the pressing mechanism including a pressing knife and a pressing driver for driving the pressing knife toward or away from the stacking stage, the output end of the pressing driver being connected to the pressing knife.

[0018] In summary, this utility model has at least the following advantages:

[0019] The stacking device provided by this utility model allows positive and negative electrode sheets to be transported to the stacking table during the stacking process. A separator roller drives the separator to move back and forth sequentially, stacking it onto the electrode sheets to form a structure of alternating layers of separator and positive and negative electrode sheets. The cell lifting assembly lowers the stacking table by one stack stroke per stack, ensuring the working plane of the stacked sheets remains at the same height. After stacking, this height is maintained, allowing the cells to be removed from the stacked position without the need for additional stacking table retrieval. During this process, at least two flattening mechanisms are provided, and the XZ axis assembly adjusts the position of the flattening components horizontally and vertically, ensuring each flattening component can flatten the separator on the stacking table. This better compresses the left and right sides of the separator, achieving a superior clamping effect. Combined with the lifting action of the cell lifting mechanism, the movement stroke of the flattening components is fixed, resulting in better stability during pressing. This effectively prevents wrinkles in the stacked sheets, ensures electrode alignment, guarantees battery life and energy density, and avoids safety accidents. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural schematic diagram of the stacking device according to an embodiment of this application;

[0021] Figure 2 for Figure 1 A magnified view of part A;

[0022] Figure 3 This is a side view of the stacking device according to an embodiment of this application;

[0023] Figure 4 This is a top view of the stacking device according to an embodiment of this application;

[0024] Figure 5 This is a side view of the stacking device according to an embodiment of this application.

[0025] Marked in the image:

[0026] 10. Stacking device;

[0027] 100. Stacking table;

[0028] 200. Flattening mechanism; 210. Flattening component; 220. XZ axis assembly; 221. X-axis unit; 2211. X-axis linear motor; 2212. X-axis slide rail; 222. Z-axis unit;

[0029] 300. Battery cell lifting mechanism;

[0030] 400. Leveling mechanism;

[0031] 500. Pressing mechanism; 510. Pressing knife;

[0032] 600. Stacking platform lifting mechanism; 610. Stacking platform lifting linear motor; 620. Stacking platform lifting slide rail;

[0033] 700, battery cell. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are some, but not all, of the embodiments of this utility model.

[0035] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0036] In the following embodiments and accompanying drawings, reference is made to Figure 1 The coordinate system is defined with the direction of the arrow pointing to the X-axis as right, the direction of the arrow pointing to the Y-axis as front, and the direction of the arrow pointing to the Z-axis as up.

[0037] Example 1:

[0038] like Figures 1 to 4 As shown, in this embodiment, a stacking device 10 is provided, including: at least two flattening mechanisms 200, a stacking table 100, and a cell lifting mechanism 300 for driving the stacking table 100 to rise or fall; the output end of the cell lifting mechanism 300 is connected to the stacking table 100 so that the working plane position of the stacking is fixed; at least two flattening mechanisms 200 are disposed on opposite sides of the stacking table 100, and the flattening mechanism 200 includes a flattening member 210 and an XZ axis assembly 220 for driving the flattening member 210 to approach or move away from the stacking table 100 from the horizontal and vertical directions, and the output end of each XZ axis assembly 220 is connected to a flattening member 210 to flatten the diaphragm on the stacking table 100.

[0039] Specifically, the stacking stage 100 is used to carry the battery cells 700 for stacking. The battery cell lifting mechanism 300 is driven to the stacking stage 100 to drive the stacking stage 100 to move along the Z-axis. The number of flattening mechanisms 200 is optional, but not limited to two, and they are arranged on the left and right sides of the stacking stage 100. In each flattening mechanism 200: the XZ axis assembly 220 is spaced apart from the stacking stage 100, and the XZ axis assembly 220 is driven to the flattening member 210.

[0040] It is worth noting that when a stacking process is required, the positive and negative electrode sheets can be transported to the stacking table 100. The diaphragm swing roller drives the diaphragm to move back and forth sequentially and stack it on the electrode sheets, forming a structure of one layer of diaphragm and one layer of positive electrode sheet, and one layer of diaphragm and one layer of negative electrode sheet. The cell 700 lifting component drives the stacking table 100 to descend by one stack stroke for each stack. In this way, the working plane of the stacking is always at the same height. After the stacking is completed, this height can be maintained and the cell 700 can be removed at the stacking completion position without the need to raise the stacking table 100 for material removal. During this process, by setting at least two flattening mechanisms 200, the XZ axis assembly 220 adjusts the position of the flattening component 210 in the horizontal and vertical directions, so that each flattening component 210 can flatten the separator on the stacking table 100, thereby better pressing the left and right sides of the separator and achieving a better pressing effect. Combined with the lifting action of the cell lifting mechanism 300, the movement stroke of the flattening component 210 is fixed, and the stability during pressing is better, thereby effectively preventing wrinkles from forming in the stack, ensuring the alignment of the electrode sheets, ensuring the service life and energy density of the battery, and avoiding the occurrence of safety accidents.

[0041] Example 2

[0042] This embodiment is a further implementation of embodiment 1. In this embodiment, as follows: Figure 1 As shown, in each flattening mechanism 200, the number of XZ axis assemblies 220 and the number of flattening parts 210 are set to at least two.

[0043] Specifically, the number of XZ axis assemblies 220 and the number of flattening components 210 can be selected, but not limited to two. By including multiple XZ axis assemblies 220 and multiple flattening components 210 in each flattening mechanism 200, the left and right sides of the diaphragm can be subjected to multiple downward pressures, resulting in better anti-wrinkle effect.

[0044] To achieve better diaphragm compression, such as Figures 1 to 3 As shown, in some embodiments, the flattening member 210 is provided with a pressure sensor for detecting the downward pressure value of the flattening member 210.

[0045] Specifically, by providing a pressure sensor on the flattening member 210, the force exerted by the flattening member 210 when pressing down on the diaphragm is fed back to the control system, reducing the risk of wrinkles in the stacked diaphragm. The method by which the pressure sensor detects the pressure value of the flattening member 210 when it presses down and provides feedback to the control system is known to those skilled in the art and is achievable, and will not be described in detail here.

[0046] To facilitate the use of the flattening component 210, such as Figure 2 As shown, in some embodiments, the flattening member 210 is configured as a pressure claw.

[0047] Specifically, the flattening member 210 may optionally include, but is not limited to, pressure claws, for pressing the diaphragm to prevent it from wrinkling during stacking. The pressure claws are plate-shaped so that they can hold and press the diaphragm.

[0048] To facilitate the movement of the cell lifting mechanism 300 and the stacking table 100, such as Figure 1 and Figure 3 As shown, in some embodiments, the cell lifting mechanism 300 includes a cell lifting linear motor, the output end of which is connected to the stacking table 100.

[0049] Specifically, the cell lifting linear motor is connected to the stacking table 100 via a connecting rod, thereby driving the stacking table 100 to descend during stacking, ensuring that the working plane of the stacking remains constant. Compared to ordinary motors driving belts, the cell lifting linear motor offers advantages such as higher torque, more compact structure, and higher control precision. Furthermore, the method by which the cell lifting linear motor drives the stacking table 100 to rise and fall is known to those skilled in the art and is feasible, and will not be described in detail here.

[0050] To facilitate adaptation to production lines with different height requirements, such as Figure 1 and Figure 3 As shown, in some embodiments, the stacking device 10 further includes a frame and a stacking lifting mechanism 600 for driving the frame to rise or fall. The cell lifting mechanism 300 and each flattening mechanism 200 are disposed on the frame, and the output end of the stacking lifting mechanism 600 is connected to the frame.

[0051] Specifically, the stacking platform lifting mechanism 600 is mounted on the base and can raise the entire frame according to the on-site assembly and adjustment accuracy, thereby facilitating the adjustment of the overall platform height to adapt to production lines with different height requirements. The cell lifting mechanism 300 is mounted on the frame, and the XZ axis assembly 220 is mounted on the frame, so that the frame can be used to support the flattening mechanism 200, the cell lifting mechanism 300, and the stacking table 100.

[0052] To facilitate the overall raising and lowering of the frame, such as Figure 1 and Figure 3 As shown, in some embodiments, the stacking lifting mechanism 600 includes a stacking lifting linear motor 610 and a stacking lifting slide rail 620. The output end of the stacking lifting linear motor 610 is connected to the frame, and the frame is slidably mounted on the stacking lifting slide rail 620.

[0053] Specifically, the platform lifting slide rail 620 is vertically mounted on the base along the Z-axis. The number of platform lifting slide rails 620 is optional, but not limited to four. The platform lifting linear motor 610 is mounted on the base and drives the frame to slide on the platform lifting slide rail 620, thereby enabling the entire mechanism above the frame to be raised and lowered. It is understood that the platform lifting linear motor 610 has advantages over ordinary motor-driven belt systems, including higher torque, more compact structure, and higher control precision. Furthermore, the method by which the platform lifting linear motor 610 drives the frame to slide on the platform lifting slide rail 620 is known to those skilled in the art and is feasible, and will not be described in detail here.

[0054] To facilitate the use of the stacking device 10, such as Figures 1 to 3 As shown, in some embodiments, the stacking device 10 further includes a pressing mechanism 500, which includes a pressing knife 510 and a pressing driver for driving the pressing knife 510 closer to or further away from the stacking stage 100. The output end of the pressing driver is connected to the pressing knife 510.

[0055] Specifically, the terminals of the electrode sheet protrude, and the pressing mechanism 500 is used to hold and press down the terminals of the diaphragm and the electrode sheet. The number of pressing mechanisms 500 is optional, but not limited to two. The pressing driver is mounted on the frame, and the pressing driver is optional, but not limited to a cylinder. The pressing driver is arranged adjacent to the stacking table 100 so that the pressing knife 510 can press down the terminals of the diaphragm and the electrode sheet on the stacking table 100. This further ensures the normal operation of the stacking process.

[0056] To facilitate the gripping of the diaphragm, such as Figures 1 to 3 As shown, in some embodiments, the stacking table 100 is provided with a gripper groove, and the frame is provided with a leveling mechanism 400 for filling the gripper groove. The leveling mechanism 400 is movably disposed in the gripper groove.

[0057] Specifically, the gripper groove is for a robotic arm to insert and grasp the stacked battery cell 700. However, during the stacking process, when the separator is placed on the stacking table 100, the separator may be recessed into the gripper groove, causing problems such as separator wrinkling and collapse during stacking. Therefore, this application uses a leveling mechanism 400 to dynamically level the gripper groove, which can facilitate the gripper to remove the battery cell 700 while ensuring the normal progress of the stacking process.

[0058] To facilitate the use of the leveling mechanism 400, such as Figure 1 middle Figure 3 As shown, in some embodiments, the leveling mechanism 400 includes a leveling plate and a leveling driver, with the output of the leveling driver connected to the leveling plate.

[0059] Specifically, the replacement driver can be, but is not limited to, a cylinder. The number and shape of the replacement plate are matched with the number and shape of the gripper grooves. The replacement plate is driven to rise and fall by the replacement driver, which facilitates the normal operation of the stacking process.

[0060] It is understood that the number of supplementary plates and the number of supplementary drivers can be selected, but are not limited to, ten.

[0061] Example 3

[0062] This embodiment is a further implementation of embodiment 1 or embodiment 2, such as... Figure 5 As shown, in this embodiment, the XZ axis assembly 220 includes an X-axis unit 221 and a Z-axis unit 222. The output end of the X-axis unit 221 is connected to the Z-axis unit 222, and the output end of the Z-axis unit 222 is connected to the flattening member 210.

[0063] Specifically, the X-axis unit 221 drives the Z-axis unit 222 to move along the X-axis direction, thereby causing the flattening member 210 to move closer to or away from the stacking table 100 in the horizontal direction. The Z-axis unit 222 drives the flattening member 210 to move along the Z-axis direction, thereby causing the flattening member 210 to move closer to or away from the stacking table 100 in the vertical direction.

[0064] To facilitate the use of the X-axis unit 221, such as Figure 5 As shown, in some embodiments, the X-axis unit 221 includes an X-axis linear motor 2211 and an X-axis slide rail 2212. The output end of the X-axis linear motor 2211 is connected to the Z-axis unit 222. The Z-axis unit 222 is slidably disposed on the X-axis slide rail 2212 to move closer to or further away from the stacking stage 100.

[0065] Specifically, the X-axis slide rail 2212 is mounted on the frame, and the X-axis linear motor 2211 is also mounted on the frame. The X-axis linear motor 2211 drives the Z-axis unit 222 to slide on the X-axis slide rail 2212, thereby allowing the flattening component 210 to horizontally approach the stacking table 100. It is understood that the X-axis linear motor 2211, compared to a conventional motor-driven belt system, offers advantages such as higher torque, more compact structure, and higher control precision. Furthermore, the method by which the X-axis linear motor 2211 drives the Z-axis unit 222 to slide on the X-axis slide rail 2212 is known to those skilled in the art and is feasible; therefore, it will not be described in detail here.

[0066] To facilitate the use of the Z-axis unit 222, such as Figure 5 As shown, in some embodiments, the Z-axis unit includes a Z-axis driver, the output of which is connected to the flattening member.

[0067] Specifically, the Z-axis driver is slidably connected to the X-axis slide rail 2212 via a slider. The Z-axis driver can be, but is not limited to, a cylinder. The method of the cylinder driving the flattening member 210 to press down is known to those skilled in the art and is feasible, and will not be described in detail here.

[0068] Example 4

[0069] This embodiment is similar to embodiment 3, except that the output end of the Z-axis unit 222 is connected to the X-axis unit 221, and the output end of the X-axis unit 221 is connected to the flattening member 210.

[0070] Example 5

[0071] This embodiment is similar to embodiment 3, except that in each flattening mechanism 200: the number of XZ axis assembly 220 and flattening component 210 is set to one, the output end of X axis unit 221 is connected to the pressure driver, and the distance between flattening component 210 and stacking table 100 is less than the distance between pressure knife 510 and stacking table 100. Flattening component 210 is set as pressure plate, and the width of pressure plate is less than the width of diaphragm.

[0072] Specifically, because the X-axis unit 221 drives the pressing driver to move horizontally closer to the stacking stage 100, the flattening member 210 and the pressing knife 510 can move horizontally synchronously. Furthermore, because the flattening member 210 is closer to the stacking stage 100, its position can be offset from that of the pressing knife 510. Therefore, the flattening member 210 can press down on the diaphragm as a whole, further preventing wrinkles. The width of the pressing plate can be two-thirds of the diaphragm width.

[0073] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0074] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0075] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0076] In this invention, unless otherwise expressly specified and limited, "above or below" the first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" the first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0077] Although the description of this utility model has been given in conjunction with the specific embodiments described above, it is obvious to those skilled in the art that many substitutions, modifications, and variations can be made based on the above description. Therefore, all such substitutions, modifications, and variations are included within the spirit and scope of the appended claims.

Claims

1. A stacking device, characterized in that, include: At least two flattening mechanisms (200), a stacking table (100), and a cell lifting mechanism (300) for driving the stacking table (100) to rise or fall; The output end of the cell lifting mechanism (300) is connected to the stacking table (100) so that the working plane position of the stacking is fixed. At least two of the flattening mechanisms (200) are disposed on opposite sides of the stacking stage (100). Each flattening mechanism (200) includes a flattening member (210) and an XZ axis assembly (220) for driving the flattening member (210) closer to or away from the stacking stage (100) in the horizontal and vertical directions. The output end of each XZ axis assembly (220) is connected to one of the flattening members (210) to flatten the diaphragm on the stacking stage (100).

2. The stacking device according to claim 1, characterized in that, In each of the flattening mechanisms (200), the number of the XZ axis assemblies (220) and the number of the flattening elements (210) are set to at least two.

3. The stacking device according to claim 1, characterized in that, The XZ axis assembly (220) includes an X-axis unit (221) and a Z-axis unit (222). The output end of the X-axis unit (221) is connected to the Z-axis unit (222), and the output end of the Z-axis unit (222) is connected to the flattening member (210).

4. The stacking device according to claim 3, characterized in that, The X-axis unit (221) includes an X-axis linear motor (2211) and an X-axis slide rail (2212). The output end of the X-axis linear motor (2211) is connected to the Z-axis unit (222). The Z-axis unit (222) is slidably disposed on the X-axis slide rail (2212) to move closer to or further away from the stacking stage (100).

5. The stacking apparatus according to claim 1, characterized in that, The flattening component (210) is provided with a pressure sensor for detecting the downward pressure value of the flattening component (210).

6. The stacking apparatus according to claim 1, characterized in that, The flattening component (210) is configured as a pressure claw.

7. The stacking apparatus according to claim 1, characterized in that, The cell lifting mechanism (300) includes a cell lifting linear motor, the output end of which is connected to the stacking table (100).

8. The stacking apparatus according to claim 1, characterized in that, It also includes a frame and a stacking lifting mechanism (600) for driving the frame to rise or fall. The battery cell lifting mechanism (300) and each of the flattening mechanisms (200) are disposed on the frame, and the output end of the stacking lifting mechanism (600) is connected to the frame.

9. The stacking apparatus according to claim 8, characterized in that, The stacking platform lifting mechanism (600) includes a stacking platform lifting linear motor (610) and a stacking platform lifting slide rail (620). The output end of the stacking platform lifting linear motor (610) is connected to the frame, and the frame is slidably mounted on the stacking platform lifting slide rail (620).

10. The stacking apparatus according to claim 1, characterized in that, It also includes a pressing mechanism (500), which includes a pressing knife (510) and a pressing driver for driving the pressing knife (510) closer to or further away from the stacking stage (100), the output of the pressing driver being connected to the pressing knife (510).

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