A hot pressing method for laminated battery core

Abstract

The present invention relates to the technical field of battery cell production, and discloses a method for hot pressing laminated battery cells. The method comprises: a battery cell acquisition step, a battery cell transfer step, a hot pressing device loading step, a hot pressing forming step, and a material removal step; in the battery cell acquisition step, the battery cells are positioned on the same axis by front and rear positioning and side positioning; after the battery cells are transferred from the positioning device to a conveying device, the battery cells are positioned on the conveying device by a limiting assembly and a limiting piece, so that the battery cells can be simultaneously moved toward the hot pressing mechanism by a conveyor belt on the conveying device and a conveyor belt on a hot pressing station, and each layer of battery cells can be accurately transferred to a target position of the hot pressing station; at this time, the multiple battery cells on the hot pressing mechanism are on the same axis, so that the pressure applied to the battery cells at each hot pressing station is in the same direction, thereby improving the yield rate of hot pressing forming of the battery cells and increasing the hot pressing efficiency of the battery cells.

Description

Technical Field

[0001] The present invention relates to the technical field of battery core production, and in particular to a hot pressing method for a laminated battery core. Background Art

[0002] In the production process of lithium-ion batteries, after the electrode production is completed, the positive and negative electrode sheets and the separator are assembled and manufactured by winding or stacking. Then, the battery cell is hot-pressed and shaped. On the one hand, the flatness of the lithium-ion battery can be improved, so that the thickness of the battery cell meets the requirements and has a high degree of consistency; on the other hand, the separator wrinkles can be eliminated, the air inside the battery cell can be expelled, and the separator and the positive and negative electrode sheets can be closely fitted together, shortening the diffusion distance of lithium ions and reducing the internal resistance of the battery.

[0003] With the increase in demand for battery cells, the hot pressing efficiency of battery cells is also in urgent need of improvement. However, there are still many problems with the existing battery cell hot pressing equipment. For example, in the technical solution disclosed in the patent application with application number CN202011344100.8 and named “An Automatic Battery Cell Hot Press”, although multiple battery cells can be hot pressed at the same time and the hot pressing efficiency is high, multiple hot press components and the input battery cells to be hot pressed are arranged in a horizontal arrangement. Multiple battery cells need to occupy a large horizontal space during the hot pressing process, which requires a large space in the factory and has poor applicability. On the other hand, the hot press disclosed in the patent cannot accurately place multiple battery cells to be hot pressed in the same position of the hot pressing station when hot pressing multiple battery cells. When the placement of the battery cells to be hot pressed is deviated, each battery cell is subjected to different pressure, resulting in a low yield rate of the battery cells after hot pressing.

[0004] Therefore, a method for hot pressing a laminated battery cell is urgently needed to solve the above problems. Summary of the Invention

[0005] Based on the above, the purpose of the present invention is to provide a method for hot pressing a laminated battery cell to solve the problem of the battery cell hot pressing machine in the prior art having low yield rate after hot pressing of the battery cell.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] The present invention provides a method for hot pressing a laminated battery cell, comprising the following steps:

[0008] S1, the step of obtaining the battery cell, using a manipulator to grab the battery cell to be hot pressed and place it on the positioning device to complete the battery cell material removal;

[0009] S2, the battery cell transfer step: the rotating mechanism rotates the positioning devices carrying the battery cells so that the multiple positioning devices are transformed from a planar parallel posture to a vertical up and down ladder posture. The rotating mechanism moves to the front of the transplanting mechanism so that the positioning devices are flush with the conveying device. The positioning devices and the conveying device cooperate to transfer the battery cells to the conveying device to complete the battery cell transfer;

[0010] S3, hot pressing device loading step, the transplanting mechanism moves the conveying device carrying the battery cells to the front of the hot pressing mechanism and flush with the hot pressing device, and the battery cells are transferred to the hot pressing station through the cooperation of the conveying device and the hot pressing device to complete the loading;

[0011] S4, hot pressing step, driving the hot pressing device by an electric cylinder to press down the battery cell on the hot pressing station to complete the hot pressing process;

[0012] S5, unloading step, the transplanting mechanism moves to the front of the hot pressing mechanism so that the conveying device is flush with the hot pressing device, and the hot pressing device cooperates with the conveying device to transfer the hot-pressed battery cells to the conveying device. The transplanting mechanism moves to the front of the rotating mechanism so that the conveying device is flush with the positioning device and transfers the battery cells to the positioning device. Finally, the robot removes the hot-pressed battery cells on the positioning device to complete the unloading.

[0013] As an optional technical solution for the hot pressing method of laminated battery cells, the step of obtaining the battery cells also includes the front and rear positioning of the battery cells. The lifting plate rises to the top of the conveyor belt, and the robot places the grabbed battery cells on the lifting plate. The lifting plate descends and moves the lower part of the battery cells to the conveyor belt. At this time, the front positioning plate rises, and the conveyor belt moves the battery cells toward the front positioning plate. The battery cells abut against the front positioning plate to complete the front and rear positioning of the battery cells.

[0014] As an optional technical solution for the hot pressing method of stacked battery cells, it also includes side positioning of the battery cells. When the lifting plate descends and moves the bottom of the battery cell to the conveyor belt, the side positioning cylinder drives the side positioning plate to move toward the static positioning plate, thereby pushing the battery cell toward the static positioning plate. When the battery cell abuts the static positioning plate, the battery cell positioning is completed.

[0015] As an optional technical solution for the hot pressing method of laminated battery cells, the transfer battery cell step also includes a positioning device rotation step. The rotating motor drives the rotating plate to rotate 90 degrees, and multiple positioning devices are driven by the connecting rod assembly to rotate and translate their positions, from a planar parallel posture to a vertical up and down step posture.

[0016] As an optional technical solution for the hot pressing method of laminated battery cells, the rotating mechanism moves to the front of the transplanting mechanism through the X-axis module and the Y-axis module. The second adjusting motor receives instructions to drive the conveying device at the bottom layer of the transplanting mechanism to be flush with the positioning device at the bottom layer of the rotating mechanism. The first adjusting motor receives instructions to drive all the conveying devices above the bottom layer of the transplanting mechanism to be flush with all the positioning devices above the bottom layer of the rotating mechanism.

[0017] As an optional technical solution for the hot pressing method of stacked battery cells, when the positioning device is close to and flush with the conveying device, the synchronous belt on the conveying device and the synchronous belt on the positioning device move in the same direction at the same time, transferring the battery cell from the positioning device to the conveying device, completing the transfer of the battery cell.

[0018] As an optional technical solution for the hot pressing method of stacked battery cells, when the battery cells are transferred to the conveying device, the battery cells are first positioned left and right by the limit assemblies on both sides of the conveying device. At this time, the conveyor belt continues to move the battery cells toward the transplanting mechanism, and the front end of the battery cells abuts against the limit parts. The first positioning sensor receives the command, the conveyor belt stops running, and the positioning of the battery cells on the conveying device is completed.

[0019] As an optional technical solution for the hot pressing method of stacked battery cells, in the loading step of the hot pressing device, when the transplanting mechanism moves to the front of the hot pressing mechanism, the second adjusting motor receives an instruction to drive the conveying device at the bottom layer of the transplanting mechanism to be flush with the hot pressing station at the bottom layer of the hot pressing mechanism, and the first adjusting motor receives an instruction to drive all the conveying devices above the bottom layer of the transplanting mechanism to be flush with all the hot pressing stations above the bottom layer of the hot pressing mechanism; at this time, the conveyor belt on the conveyor device and the conveyor belt on the hot pressing station move toward the hot pressing mechanism at the same time, transferring the battery cells from the conveyor device to the hot pressing station, completing the loading of the hot pressing station.

[0020] As an optional technical solution for the hot pressing method of laminated battery cells, in the hot pressing forming step, the hot pressing motor receives instructions, drives the electric cylinder to press down, and then drives the hot pressing device to press down. At this time, the reverse thrust cylinder connected to both sides of the hot pressing station receives instructions to adjust the pressure between each hot pressing device, so that the pressure between the hot pressing device and the hot pressing station of each layer is the same.

[0021] As an optional technical solution for the hot pressing method of laminated battery cells, in the unloading step, after the conveying device transfers the battery cell from the hot pressing station to the positioning device, the side positioning cylinder drives the side positioning plate and then drives the battery cell toward the static positioning plate, so that the battery cell after hot pressing is completed with left and right positioning. At this time, the lifting plate rises to lift the battery cell into the air, and finally the battery cell is taken away by the robot.

[0022] The present invention provides a method for hot pressing a laminated battery cell, which has at least the following beneficial effects:

[0023] 1. Through the battery cell acquisition step and the battery cell transfer step, multiple battery cells to be hot pressed can be transported to the transplanting mechanism in a vertical up and down stepped posture at the same time. Through the hot pressing device loading step, multiple battery cells to be hot pressed are transported to the hot pressing mechanism in a vertical up and down stepped posture, so that the multi-layer stepped hot pressing mechanism can hot press multiple battery cells at the same time, reducing the footprint of the traditional multi-station hot press and improving the battery cell hot pressing efficiency.

[0024] 2. In the step of obtaining the battery cells, the front and rear positioning and side positioning of the battery cells are performed so that multiple battery cells are in the same axial position on the corresponding positioning device. After the battery cells are transferred from the positioning device to the conveying device, the battery cells are positioned left and right and front and rear by the limiting components to complete the positioning of the battery cells on the conveying device. In the step of loading the hot pressing device, the battery cells of each layer can be accurately conveyed to the target position of the hot pressing station when the conveyor belt on the conveyor device and the conveyor belt on the hot pressing station are moved toward the hot pressing mechanism at the same time. At this time, the multiple battery cells on the hot pressing mechanism are on the same axis, so that the pressure on the battery cells at each hot pressing station is in the same direction, which improves the yield rate of hot pressing of the battery cells and increases the hot pressing efficiency of the battery cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the overall structure of a hot pressing device for laminated battery cells according to an embodiment of the present invention;

[0026] Figure 2 Schematic diagram of the structure of the rotating mechanism in an embodiment of the present invention;

[0027] Figure 3 This is a schematic structural diagram of a positioning device in a first viewing angle according to an embodiment of the present invention;

[0028] Figure 4 2 is a schematic structural diagram of a positioning device according to an embodiment of the present invention from a second viewing angle;

[0029] Figure 5 This is a structural diagram of a jacking assembly in an embodiment of the present invention;

[0030] Figure 6 This is a structural diagram of a transplanting mechanism in an embodiment of the present invention;

[0031] Figure 7 for Figure 6 An enlarged schematic diagram of Figure 22;

[0032] Figure 8 Schematic diagram of the structure of the conveying device in an embodiment of the present invention;

[0033] Figure 9 Schematic diagram of the structure of the hot pressing mechanism in an embodiment of the present invention;

[0034] Figure 10 This is a structural diagram of a hot pressing station in an embodiment of the present invention;

[0035] Figure 11 The figure is a flow chart of the hot pressing method of the laminated battery cell of the present invention.

[0036] In the picture:

[0037] 1. Rotating mechanism; 10. First frame; 11. Rotating motor; 12. Rotating plate; 13. Connecting rod assembly; 15. Positioning device; 151. Front stopper positioning assembly; 1511. Front positioning plate; 1512. Front positioning cylinder; 152. Side positioning assembly; 1521. Side positioning cylinder; 1522. Side positioning plate; 153. Lifting assembly; 1531. Bottom plate; 1532. Buffer; 1533. Mounting seat; 1534. Gear rod; 1535. Lifting cylinder; 1536. Driving gear; 1537. Lifting plate; 1538. Lifting mounting plate; 154. First driving motor; 155. Conveying assembly; 1551. Active roller shaft; 1552. Driven roller shaft; 1553. Side stopper; 156. Limit sensor; 157. Static positioning plate;

[0038] 2. Transplanting mechanism; 20. Second frame; 21. Conveying device; 210. Sliding plate; 2101. Limiting member; 211. Side plate; 212. Limiting assembly; 2121. Limiting seat; 2122. Pulley; 22. Adjusting assembly; 221. Adjusting block; 222. First adjusting screw; 223. Second adjusting screw; 23. First adjusting motor; 24. Second adjusting motor; 25. Second driving motor; 26. Driving shaft; 27. Driven shaft; 28. First positioning sensor;

[0039] 3. Hot pressing mechanism; 30. Third frame; 31. Electric cylinder; 32. Hot pressing motor; 33. Hot pressing device; 331. Lower pressing plate; 332. Heat insulation plate; 333. Heating plate; 34. Hot pressing station; 341. Third drive motor; 342. Main reel; 343. Slave reel; 345. Hot pressing conveyor belt; 346. Side connecting plate; 347. Second positioning sensor; 348. Third positioning sensor; 35. Back-thrust cylinder;

[0040] 4. X-axis module; 5. Y-axis module. DETAILED DESCRIPTION

[0041] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0042] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0043] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0044] In the description of this embodiment, the terms "up", "down", "left", "right", etc., and the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0045] In the description of the present invention, unless otherwise specified, "a plurality of" means two or more. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0046] The present invention provides a method for hot pressing a laminated battery cell, such as Figure 11 The laminated battery cell hot pressing method includes: obtaining battery cells, transferring battery cells, loading the hot pressing device, hot pressing and forming, and unloading. The details are as follows:

[0047] S1, the step of obtaining the battery cell, using a manipulator to grab the battery cell to be hot pressed and place it on the positioning device to complete the battery cell material removal;

[0048] S2, the battery cell transfer step: the rotating mechanism rotates the positioning devices carrying the battery cells so that the multiple positioning devices are transformed from a planar parallel posture to a vertical up and down ladder posture. The rotating mechanism moves to the front of the transplanting mechanism so that the positioning devices are flush with the conveying device. The positioning devices and the conveying device cooperate to transfer the battery cells to the conveying device to complete the battery cell transfer;

[0049] S3, hot pressing device loading step, the transplanting mechanism moves the conveying device carrying the battery cells to the front of the hot pressing mechanism and flush with the hot pressing device, and the battery cells are transferred to the hot pressing station through the cooperation of the conveying device and the hot pressing device to complete the loading;

[0050] S4, hot pressing step, driving the hot pressing device by an electric cylinder to press down the battery cell on the hot pressing station to complete the hot pressing process;

[0051] S5, unloading step, the transplanting mechanism moves to the front of the hot pressing mechanism so that the conveying device is flush with the hot pressing device, and the hot pressing device cooperates with the conveying device to transfer the hot-pressed battery cells to the conveying device. The transplanting mechanism moves to the front of the rotating mechanism so that the conveying device is flush with the positioning device and transfers the battery cells to the positioning device. Finally, the robot removes the hot-pressed battery cells on the positioning device to complete the unloading.

[0052] The above-mentioned laminated battery cell hot pressing method can simultaneously transport multiple battery cells to be hot pressed in a vertical up and down stepped posture to the transplanting mechanism through the battery cell obtaining step and the battery cell transfer step, and transport multiple battery cells to be hot pressed in a vertical up and down stepped posture to the hot pressing mechanism through the hot pressing device loading step, so that the multi-layer stepped hot pressing mechanism can hot press multiple battery cells at the same time, reducing the footprint of the traditional multi-station hot press machine and improving the battery cell hot pressing efficiency. In the step of obtaining the battery cells, the front and rear positioning and side positioning of the battery cells are performed so that multiple battery cells are in the same axial position on the corresponding positioning device. After the battery cells are transferred from the positioning device to the conveying device, the battery cells are positioned left and right and front and back by the limiting components to complete the positioning of the battery cells on the conveying device. In the step of loading the hot pressing device, the battery cells of each layer can be accurately conveyed to the target position of the hot pressing station when the conveyor belt on the conveyor device and the conveyor belt on the hot pressing station are moved toward the hot pressing mechanism at the same time. At this time, the multiple battery cells on the hot pressing mechanism are on the same axis, so that the pressure on the battery cells at each hot pressing station is in the same direction, which improves the yield rate of hot pressing forming of the battery cells and increases the hot pressing efficiency of the battery cells.

[0053] In one embodiment, the S1, cell acquisition step also includes front and rear positioning of the cell. The lifting plate rises to above the conveyor belt, and the robot places the grabbed cell on the lifting plate. The lifting plate descends and moves the lower part of the cell to the conveyor belt. At this time, the front positioning plate rises, and the conveyor belt moves the cell toward the front positioning plate. The cell abuts against the front positioning plate to complete the front and rear positioning of the cell.

[0054] In one embodiment, the side positioning of the battery cell is also included. When the lifting plate is lowered to move the battery cell to the conveyor belt, the side positioning cylinder drives the side positioning plate to move toward the static positioning plate, thereby pushing the battery cell toward the static positioning plate. When the battery cell abuts the static positioning plate, the positioning of the battery cell is completed.

[0055] In one embodiment, the S2, transfer cell step also includes a positioning device rotation step, in which the rotating motor drives the rotating plate to rotate 90 degrees, and multiple positioning devices are driven by the connecting rod assembly to rotate and translate the positions, changing from a planar parallel posture to a vertical up and down step posture.

[0056] In one embodiment, when the rotating mechanism moves to the front of the transplanting mechanism through the X-axis module and the Y-axis module, the second adjusting motor receives an instruction to drive the conveying device at the bottom layer of the transplanting mechanism to be flush with the positioning device at the bottom layer of the rotating mechanism, and the first adjusting motor receives an instruction to drive all the conveying devices above the bottom layer of the transplanting mechanism to be flush with all the positioning devices above the bottom layer of the rotating mechanism.

[0057] In one embodiment, when the positioning device is close to and aligned with the conveying device, the conveyor belt on the conveying device and the conveyor belt on the positioning device move simultaneously in the same direction, transferring the battery cells from the positioning device to the conveying device, thereby completing the transfer of the battery cells.

[0058] In one embodiment, after the battery cell is transferred to the conveying device, the battery cell is first positioned left and right by the limit assemblies on both sides of the conveying device. At this time, the conveyor belt continues to move the battery cell toward the transplanting mechanism, and the front end of the battery cell abuts against the limit member. The first positioning sensor receives the instruction, the conveyor belt stops running, and the positioning of the battery cell on the conveying device is completed.

[0059] In one embodiment, in the S3, hot pressing device loading step, when the transplanting mechanism moves to the front of the hot pressing mechanism, the second adjusting motor receives an instruction to drive the conveying device at the bottom layer of the transplanting mechanism to be flush with the hot pressing station at the bottom layer of the hot pressing mechanism, and the first adjusting motor receives an instruction to drive all the conveying devices above the bottom layer of the transplanting mechanism to be flush with all the hot pressing stations above the bottom layer of the hot pressing mechanism; at this time, the conveyor belt on the conveyor device and the conveyor belt on the hot pressing station move toward the hot pressing mechanism at the same time, transferring the battery cells from the conveyor device to the hot pressing station, thereby completing the loading of the hot pressing station.

[0060] In one embodiment, in the S4, hot pressing forming step, the hot pressing motor receives instructions, drives the electric cylinder to press down, and then drives the hot pressing device to press down. At this time, the reverse thrust cylinder connected to both sides of the hot pressing station receives instructions to adjust the pressure between each hot pressing device, so that the pressure between the hot pressing device and the hot pressing station of each layer is the same.

[0061] In one embodiment, in the S5, unloading step, after the conveying device transfers the battery cell from the hot pressing station to the positioning device, the side positioning cylinder drives the side positioning plate and then drives the battery cell toward the static positioning plate, so that the battery cell after hot pressing is completed with left and right positioning. At this time, the lifting plate rises to lift the battery cell into the air, and finally the battery cell is taken away by the robot.

[0062] To further illustrate the hot pressing methods for laminated battery cells according to the above embodiments, the hot pressing methods for laminated battery cells according to the above embodiments are used in conjunction with the following hot pressing equipment for laminated battery cells.

[0063] like Figure 1 As shown, there are two groups of hot pressing mechanisms 3, each group having three units, but not limited to three units; the two groups of hot pressing mechanisms 3 are symmetrically arranged back to back, and a group of transplanting mechanisms 2 is arranged in front of each group of hot pressing mechanisms 3, each group of transplanting mechanisms 2 consists of two units and is arranged on the same axis. A rotating mechanism 1 is provided on each side of the two groups of hot pressing mechanisms 3; wherein, the transplanting mechanism 2 and the rotating mechanism 1 are respectively arranged on the Y-axis module 5, and the bottom of the Y-axis module 5 is connected to the X-axis module 4, that is, the transplanting mechanism 2 and the rotating mechanism 1 can move on the X-axis and Y-axis. wherein, one rotating mechanism 1 is used for loading, and the other rotating mechanism 1 is used for unloading; wherein, one transplanting mechanism 2 in the same group is used for loading, and the other transplanting mechanism 2 is used for unloading.

[0064] In the present invention, Figure 2 As shown, the rotating mechanism 1 includes a first frame 10 that is slidably connected to the Y-axis module 5, a rotating motor 11 is installed on one side of the upper end of the first frame 10, and a rotating plate 12 is installed on the other side of the upper end of the first frame 10. The center of the rotating plate 12 is rotatably connected to the rotating motor 11, and a plurality of positioning devices 15 are installed in parallel on the axis of the rotating plate 12, preferably four positioning devices 15, each positioning device 15 is connected to the rotating plate 12 through a rotating shaft, and a connecting component is further provided between the four positioning devices 15. The connecting component is a multi-link structure that can be linked to each other. When the manipulator places the battery cell to be hot-pressed on the positioning device 15, the rotating motor 11 can drive the rotating plate 12 to rotate 90 degrees, thereby The connecting rod assembly 13 and the positioning device 15 are driven to rotate in conjunction with each other. At this time, the four positioning devices 15 are rotated from a plane parallel arrangement to an upper and lower stacked stepped arrangement, so that the positioning device 15 can maintain the same posture as the conveying device 21 on the transplanting mechanism 2, which is convenient for the transfer and transportation of the battery cells; under the above structure, when the robot needs to pick up and place the battery cells on the positioning device 15, the rotating mechanism 1 rotates the four positioning devices 15 to a horizontal plane state through the rotating motor 11. When the positioning device 15 needs to transfer the battery cells with the conveying device 21, the rotating mechanism 1 rotates the four positioning devices 15 to a stepped state through the rotating motor 11. This structure improves the efficiency of loading and unloading and transferring the battery cells.

[0065] In this embodiment, if Figures 3 to 5 As shown, the positioning device 15 includes: a conveying assembly 155, a first driving motor 154, a lifting assembly 153, a side positioning assembly 152 and two sets of front block positioning assemblies 151.

[0066] Further, such as Figure 3 and Figure 4 As shown, the first drive motor 154 is arranged on one side of the conveying assembly 155 and is connected to the conveying assembly 155; the lifting assembly 153 is mounted in the middle below the conveying assembly 155; the side positioning assembly 152 is arranged above the first drive motor 154, and the side positioning assembly 152 includes a side positioning cylinder 1521 and a side positioning plate 1522. The side positioning cylinder 1521 is arranged on the side baffle, and the side positioning plate 1522 is connected to the driving end of the side positioning cylinder 1521; the top surface of the side baffle 1553 opposite to the side positioning assembly 152 A static positioning plate 157 is provided, and two adjustment grooves are opened on the top surface of the static positioning plate 157, and screws are provided in the adjustment grooves. The static positioning plate 157 can be adjusted or fixed by cooperating with the adjustment grooves and the screws. By adjusting the position of the static positioning plate 157, the size of the placed battery cells can be adjusted; two groups of front block positioning assemblies 151 are respectively arranged in front and behind the jacking assembly 153, and the front block positioning assembly 151 includes a front positioning cylinder 1512 and a front positioning plate 1511, and the front positioning plate 1511 is connected to the driving end of the front positioning cylinder 1512.

[0067] In this embodiment, if Figure 4 As shown, the conveying assembly 155 includes two side baffles 1553, a plurality of synchronous belts, an active roller shaft 1551 and a driven roller shaft 1552. The active roller shaft 1551 and the driven roller shaft 1552 are rotatably arranged between the two side baffles 1553, and the active roller shaft 1551 and the driven roller shaft 1552 are respectively located at the two ends of the side baffles 1553. Both ends of the active roller shaft 1551 and the driven roller shaft 1552 are provided with bearings, and the bearings are embedded in the side baffles 1553. The bearings effectively reduce the friction generated by the rotation of the active roller shaft 1551 and the driven roller shaft 1552. The synchronous belts are evenly spaced around the active roller 1551 and the driven roller 1552. The surfaces of the active roller 1551 and the driven roller 1552 are provided with transverse teeth, and the inner surface of the synchronous belt is provided with matching teeth. The combination of these teeth increases the friction between the synchronous belt and the active roller 1551 and the driven roller 1552, so that the rotation of the active roller 1551 can drive the rotation of the driven roller 1552 through the synchronous belt. Each synchronous belt is located between adjacent lifting plates 1537 and between adjacent protrusions of the front positioning plate 1511. Limit sensors 156 are installed on the top surfaces of both ends of the two side guard plates 1553 to detect the position of the battery cells.

[0068] In this embodiment, if Figure 5As shown, the lifting assembly 153 includes a base plate 1531, a buffer 1532, a mounting seat 1533, a gear rod 1534, a driving gear 1536, a lifting cylinder 1535, a lifting mounting plate 1538 and a lifting plate 1537. The buffer 1532 is provided with multiple buffers and is arranged through the base plate 1531. The top of the buffer 1532 abuts against the bottom of the lifting mounting plate 1538. The buffer 1532 can prevent the battery from bouncing off or leaving its original position due to the lifting force when the battery is lifted. The lifting plate 1537 is vertically installed on the upper end of the lifting mounting plate 1538, the telescopic end of the lifting cylinder 1535 is drive-connected to one end of the gear rod 1534, the mounting seat 1533 is arranged between the two base plates 1531, and the driving gear 1536 is arranged by a crankshaft rotating through the mounting plate, the driving gear 1536 and the gear rod 1534 are meshed and connected, and the other end of the crankshaft is rotatably connected to the bottom of the lifting mounting plate 1538. There are several lifting plates 1537, and the upper end of the lifting plate 1537 has a comb-shaped protrusion.

[0069] When the first drive motor 154 drives the active roller 1551, it can drive the synchronous belt to run and transport the battery cells set on the synchronous belt. At the same time, the front positioning cylinder 1512 in the two sets of front positioning assemblies 151 drive the front positioning plate 1511 to extend above the synchronous belt to position the battery cells front and back, and the side positioning cylinder 1521 drives the side positioning plate 1522 to position the battery cells left and right; the lifting cylinder 1535 drives the lifting plate 1537 to move up and down. When the lifting plate 1537 moves upward, the lifting plate 1537 will protrude from the top surface of the synchronous belt and lift the battery cells to facilitate the robot to pick up and place. Under the above structure, the battery cells can be confined to the grasping range without the need for visual equipment or movement of the grasping equipment. The battery is lifted up in the air by the lifting assembly 153, which will not hinder the robot from grasping the battery cells, preventing the robot from damaging the battery cells due to lack of a suitable angle when grasping the battery cells. At the same time, after the battery cells are positioned front and back and sideways, multiple battery cells are located at the same axial position on the corresponding positioning devices 15, which makes it easier to transfer the battery cells to the conveying device 21 for positioning.

[0070] In the present invention, Figure 6As shown, the transplanting mechanism 2 includes a second frame 20 arranged on the Y-axis module 5, and two slide rails are longitudinally and parallelly provided on both sides of the second frame 20, and a plurality of movable and adjustable conveying devices 21 are provided on the slide rails. The conveying devices 21 are preferably four, and the four conveying devices 21 are slidably arranged on the two slide rails in a stepped manner. Adjustment components 22 are connected on both sides between each conveying device 21, and a first adjusting motor 23 is provided at the top of the second frame 20. The output end of the first adjusting motor 23 is connected to a roller shaft, and the roller shaft is connected to the three conveying devices 21 on the upper layer of the second frame 20 in turn, and the first adjusting motor 23 can drive the three conveying devices 21 on the upper layer to move up and down. A second adjusting motor 24 is also provided near the bottom of the second frame 20, and the output end of the second adjusting motor 24 is drivingly connected to a conveying device 21 on the bottom layer.

[0071] Specifically, such as Figure 7 As shown, the adjusting assembly 22 includes an adjusting block 221, a first adjusting screw 222 and a second adjusting screw 223. The first adjusting screw 222 passes through the bottom of the adjusting block 221 and is provided with a nut on the first adjusting screw 222 above and below the adjusting block 221. The arrangement of the two nuts enables the first adjusting screw 222 to be able to adjust the length of its screw rod extending downward on the mounting block. The first adjusting screw 222 is used to limit the minimum spacing between the upper and lower conveying devices 21; the second adjusting screw 223 passes through the bottom of the adjusting block 221 and at the same time passes through the top of another adjusting block 221 arranged opposite to the bottom. Its screw rod extends to the bottom of the upper end of the other adjusting block 221, and a nut is provided on the screw rod extended therefrom. By adjusting the position of the nut on the screw rod of the second adjusting screw 223, the maximum spacing stroke of the upper and lower conveying devices 21 can be adjusted. The second adjusting screw 223 is used to limit the maximum spacing between the upper and lower conveying devices 21; under the above structure, when When the transplanting mechanism 2 cooperates with the rotating mechanism 1 to transfer the battery cells, the second adjusting motor 24 first drives the conveying device 21 of the bottom layer to be flush with the positioning device 15 of the bottom layer of the rotating mechanism 1, and then the three conveying devices 21 of the upper layer are driven to move up by the first adjusting motor 23 until the second limit screw is limited to the maximum stroke between the upper and lower adjusting blocks 221. At this time, the conveying device 21 of each layer can be flush with the positioning device 15 of each layer, which is convenient for the transfer of the battery cells; when the transplanting mechanism 2 cooperates with the hot pressing mechanism 3 to load and unload, the second adjusting motor 24 first drives the conveying device 21 of the bottom layer to be flush with the hot pressing station 34 of the hot pressing mechanism 3, and then the three conveying devices 21 of the upper layer are driven to move down by the first adjusting motor 23 until the end of the first limit screw abuts against the top of the adjusting block 221 relatively below. At this time, the conveying device 21 of each layer can be flush with the hot pressing station 34 of each layer, which is convenient for the loading and unloading of the battery cells.

[0072] Further, such as Figure 8As shown, the conveying device 21 includes a sliding plate 210 that is slidably connected to the two slide rails on the second frame 20, and side plates 211 are arranged in parallel at both ends of the sliding plate 210. The two ends of the side plate 211 are respectively connected to the driving shaft 26 and the driven shaft 27. The driving shaft 26 and the driven shaft 27 are connected by multiple synchronous belts. One end of the driving shaft 26 is driven by a second driving motor 25. The second driving motor 25 drives the driving shaft 26 and drives the synchronous belt to move. A limit assembly 212 is provided at the top of each of the two side plates 211. The limit assembly 212 includes a limit seat 2121 installed on the side plate 211 and a plurality of pulleys 2122 arranged on the limit seat 2121. The limit seat 2121 is adjustably arranged at the upper end of the side plate 211, and the middle part of the sliding plate 210 faces the driven wheel. A limit piece 2101 is also provided in the direction, and a first positioning sensor 28 is provided at one end of the side plate 211 near the sliding plate 210; under the above structure, when the positioning device 15 is flush with the conveying device 21 and the conveying device 21 is used to convey the battery cells, the battery cells are first positioned left and right through the two limit components 212. When the front end of the battery cell touches the limit piece 2101, the first positioning sensor 28 senses its position and sends a signal to stop the second drive motor 25, thereby making the battery cells on each layer of the conveying device 21 in the same axial position. This structure enables the battery cells of each layer to be uniformly conveyed to the same target position when conveying the battery cells to the hot pressing station 34, and the battery cells can be more accurately delivered to the target position of the hot pressing station 34, thereby improving the hot pressing effect of the battery cells.

[0073] In the present invention, Figure 9 and Figure 10As shown, the hot pressing mechanism 3 includes a third frame 30, an electric cylinder 31, a hot pressing motor 32, a hot pressing device 33 and a hot pressing station 34. The electric cylinder 31 is arranged at the upper end of the third frame 30, and the hot pressing motor 32 is driven and connected to the upper end of the electric cylinder 31. The hot pressing device 33 is provided with a plurality of preferably four but not limited to four. The four hot pressing devices 33 are arranged in an upper and lower stepped manner in the third frame 30, including a lower pressing plate 331, a heat insulation plate 332 and a heating plate 333 connected from top to bottom. A hot pressing station 34 is provided below each hot pressing device 33. The workstation 34 includes side connecting plates 346 on both sides. The two ends of the two side connecting plates 346 are respectively provided with a main winding shaft 342 and a slave winding shaft 343. One end of the main winding shaft 342 is driven and connected to a third driving motor 341. A high-temperature resistant hot pressing conveyor belt 345 is connected between the main winding shaft 342 and the slave winding shaft 343. A heating plate 333 is also provided under the hot pressing conveyor belt 345. The third driving motor 341 can drive the hot pressing conveyor belt 345 to move back and forth. The front and rear ends of the two side connecting plates 346 are respectively opposite to each other. A second positioning sensor 347 and a third positioning sensor 348 are provided, and a reverse thrust cylinder 35 is connected to both sides of the lower pressing plate 331. The hot pressing station 34 is placed on the upper end of the lower pressing plate 331, and the output end of the electric cylinder 31 is connected to the uppermost lower pressing plate 331. Under the above structure, when the conveying device 21 conveys the battery cell to the hot pressing station 34, the third driving motor 341 drives the hot pressing conveyor belt 345 to move and drives the battery cell to move backward. The second positioning sensor 347 and the third positioning sensor 348 sense the battery cell at the hot pressing station. When the battery cell reaches the target position on the conveyor 21, the third positioning sensor 348 sends a signal, and the third drive motor 341 stops working. Since the multiple battery cells to be hot-pressed are located on the same axis on the conveyor 21, the multiple battery cells can be synchronously conveyed to the target position of the hot-pressing station 34. When the electric cylinder 31 presses down, the multiple battery cells are subjected to the same pressure, ensuring that each battery cell can be hot-pressed to a qualified level, improving the hot-pressing effect of the battery cells, and at the same time improving the yield rate of hot-pressing of the battery cells. Since each layer of hot-pressing stations 34 has its own weight, when the electric cylinder 31 presses down, the pressure on the bottom layer of hot-pressing stations 34 is often greater than that on the upper layer. Therefore, when the electric cylinder 31 presses down, the reverse thrust cylinder 35 receives a command to reverse the hot-pressing stations 34 with excessive pressure, ensuring that the pressure on the battery cells on each layer of hot-pressing stations 34 is the same, thereby improving the hot-pressing effect of the battery cells.

[0074] In the present invention, the battery cells to be hot pressed are placed on the positioning device 15 by a robot arm. The positioning device 15 positions the battery cells, rotates to be flush with the conveying device 21, and conveys the battery cells to the conveying device 21. After the battery cells are secondary positioned by the conveying device 21, the battery cells are uniformly conveyed to the target position of the hot pressing station 34, so that multiple battery cells can be conveyed to the hot pressing mechanism 3 at one time, and it can be ensured that multiple battery cells are accurately conveyed to the target position for hot pressing, which not only improves the hot pressing efficiency, but more importantly, the placement position of each battery cell during hot pressing will not deviate, so that the pressure is uniform, which improves the yield rate of the battery cells after hot pressing.

[0075] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention is disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technology of the present invention are all within the scope of the technical solution of the present invention without departing from the content of the technical solution of the present invention.

Claims

1. A hot pressing method for a laminated battery cell, characterized in that: include: S1, the step of obtaining the battery cell, using a manipulator to grab the battery cell to be hot pressed and place it on the positioning device to complete the battery cell material removal; S2, the battery cell transfer step: the rotating mechanism rotates the positioning devices carrying the battery cells so that the multiple positioning devices are transformed from a planar parallel posture to a vertical up and down ladder posture. The rotating mechanism moves to the front of the transplanting mechanism so that the positioning devices are flush with the conveying device. The positioning devices and the conveying device cooperate to transfer the battery cells to the conveying device to complete the battery cell transfer; S3, hot pressing device loading step, the transplanting mechanism moves the conveying device carrying the battery cells to the front of the hot pressing mechanism and flush with the hot pressing device, and the battery cells are transferred to the hot pressing station through the cooperation of the conveying device and the hot pressing device to complete the loading; S4, hot pressing step, driving the hot pressing device by an electric cylinder to press down the battery cell on the hot pressing station to complete the hot pressing process; S5, unloading step, the transfer mechanism moves to the front of the hot pressing mechanism so that the conveying device is flush with the hot pressing device, and the hot pressing device cooperates to transfer the hot-pressed battery cells to the transfer mechanism. The transfer mechanism moves to the front of the rotating mechanism so that the conveying device is flush with the positioning device and transfers the battery cells to the positioning device. Finally, the robot removes the hot-pressed battery cells on the positioning device, completing the unloading; The method implements hot pressing of the battery cells by using a hot pressing device for laminated battery cells, wherein the hot pressing device for laminated battery cells comprises at least two groups of hot pressing mechanisms, each group having at least three units, a group of transfer mechanisms being provided in front of each group of the hot pressing mechanisms, a rotation mechanism being provided on the left and right sides of the hot pressing mechanisms, a Y-axis module being installed at the bottom of the transfer mechanism and the rotation mechanism, and an X-axis module being installed at the bottom of the Y-axis module; The rotating mechanism includes a first frame slidably connected to the Y-axis module, a rotating motor is installed on one side of the upper end of the first frame, and a rotating plate is installed on the other side of the upper end of the first frame. The center of the rotating plate is rotatably connected to the rotating motor. A plurality of positioning devices are installed in parallel on the axis of the rotating plate. Each positioning device is connected to the rotating plate through a rotating shaft. A connecting assembly is also provided between the four positioning devices, and the connecting assembly is a multi-link structure that can be linked to each other. The positioning device includes a conveying assembly, a first driving motor, a jacking assembly, a side positioning assembly and two groups of front block positioning assemblies; the first driving motor is arranged on one side of the conveying assembly and is driven and connected to the conveying assembly; the jacking assembly is mounted in the middle below the conveying assembly; the side positioning assembly is arranged above the first driving motor, the side positioning assembly includes a side positioning cylinder and a side positioning plate, the side positioning cylinder is arranged on the side baffle, and the side positioning plate is connected to the driving end of the side positioning cylinder; the top surface of the side baffle opposite to the side positioning assembly is provided with a static positioning plate, and the top surface of the static positioning plate is provided with two adjusting grooves, and screws are provided in the adjusting grooves; the two groups of front block positioning assemblies are respectively arranged in front and behind the jacking assembly, the front block positioning assembly includes a front positioning cylinder and a front positioning plate, and the front positioning plate is connected to the driving end of the front positioning cylinder; The transplanting mechanism includes a second frame arranged on the Y-axis module, slide rails are provided on both sides of the second frame in parallel in the longitudinal direction, and a plurality of movable and adjustable conveying devices are provided on the slide rails. A first adjusting motor is provided on the top of the second frame, and an output end of the first adjusting motor is connected to a roller shaft, which is sequentially connected to a plurality of conveying devices on the bottom layer of the second frame. A second adjusting motor is also provided near the bottom of the second frame, and an output end of the second adjusting motor is drivingly connected to a conveying device on the bottom layer. The step of obtaining the battery cell also includes front and rear positioning and side positioning of the battery cell. The jacking plate rises to the top of the synchronous belt, and the manipulator places the grabbed battery cell on the jacking plate. The jacking plate descends to move the bottom of the battery cell onto the synchronous belt. At this time, the front positioning plate rises, and the synchronous belt moves the battery cell toward the front positioning plate. The battery cell abuts against the front positioning plate to complete the front and rear positioning of the battery cell; after the jacking plate descends to move the bottom of the battery cell onto the synchronous belt, the side positioning cylinder drives the side positioning plate to move toward the static positioning plate, and then pushes the battery cell to move toward the static positioning plate. When the battery cell abuts against the static positioning plate, the side positioning of the battery cell is completed; The cell transfer step also includes a positioning device rotation step, in which the rotating motor drives the rotating plate to rotate 90 degrees, and the multiple positioning devices are driven by the connecting rod assembly to rotate and translate the positions, and change from a planar parallel posture to a vertical up and down ladder posture; the rotating mechanism moves to the front of the transplanting mechanism through the X-axis module and the Y-axis module, and the second adjustment motor receives a command to drive the conveying device at the bottom layer of the transplanting mechanism to be flush with the positioning device at the bottom layer of the rotating mechanism, and the first adjustment motor receives a command to drive all the conveying devices above the bottom layer of the transplanting mechanism to be flush with all the positioning devices above the bottom layer of the rotating mechanism; when the positioning device and the conveying device are close to and flush with each other, the synchronous belt on the conveying device and the synchronous belt on the positioning device move in the same direction at the same time, transferring the cell from the positioning device to the conveying device, completing the transfer of the cell; when the cell is transferred to the conveying device, the cell is first positioned left and right by the limit assemblies on both sides of the conveying device. At this time, the conveyor belt continues to move the cell toward the transplanting mechanism, and the front end of the cell abuts against the limit member. The first positioning sensor receives a command, and the conveyor belt stops running, completing the positioning of the cell on the conveying device.

2. A hot pressing method for a laminated battery cell according to claim 1, characterized in that: In the loading step of the hot pressing device, when the transplanting mechanism moves to the front of the hot pressing mechanism, the second regulating motor receives an instruction to drive the conveying device at the bottom layer of the transplanting mechanism to be flush with the hot pressing station at the bottom layer of the hot pressing mechanism, and the first regulating motor receives an instruction to drive all the conveying devices above the bottom layer of the transplanting mechanism to be flush with all the hot pressing stations above the bottom layer of the hot pressing mechanism; at this time, the conveyor belt on the conveyor device and the conveyor belt on the hot pressing station move toward the hot pressing mechanism at the same time, transferring the battery cells from the conveyor device to the hot pressing station, and completing the loading of the hot pressing station.

3. The method for hot pressing a laminated battery cell according to claim 1, wherein: During the hot pressing forming step, the hot pressing motor receives instructions, drives the electric cylinder to press down, and then drives the hot pressing device to press down. At this time, the reverse thrust cylinders connected on both sides of the hot pressing station receive instructions to adjust the pressure between each hot pressing device, so that the pressure between the hot pressing device and the hot pressing station of each layer is the same.

4. A laminated battery core hot pressing method according to claim 3, characterized in that: In the unloading step, after the conveying device transfers the battery cell from the hot pressing station to the positioning device, the side positioning cylinder drives the side positioning plate and then drives the battery cell to move toward the static positioning plate, so that the battery cell after hot pressing is completed with left and right positioning. At this time, the lifting plate rises to lift the battery cell into the air, and finally the battery cell is taken away by the robot.

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