A battery cell flattening device

Abstract

The cam follower is connected to the bottom surface of the clamping jaws and the bottom surface of the clamping jaws are connected to the bottom surface of the clamping jaws when the turret rotates.

Description

Technical Field

[0001] The present invention belongs to the technical field of lithium battery manufacturing equipment, and in particular relates to a battery cell flattening device. Background Art

[0002] With the rapid development of the lithium battery industry, lithium batteries are increasingly being used in a wide range of applications. Users are also placing increasing demands on battery quality, and lithium battery manufacturing processes must continue to improve to meet these needs. Currently, some lithium battery manufacturing processes have added a tab flattening process. This involves using a flattening wheel to flatten the tabs extending from the ends of the battery cells. After the battery cell clamps and moves them to the flattening station, the flattening wheel performs the flattening. If pneumatic grippers are used to grip the battery cells, cylinders are required to control the opening and closing of the grippers. However, cylinder control requires a long response time, which cannot meet the demand for improved equipment efficiency. Summary of the Invention

[0003] The purpose of the present invention is to provide a high-efficiency and high-precision battery cell flattening device.

[0004] In order to achieve the above objectives, the present invention adopts the following technical solutions:

[0005] The cam follower mounting bracket of the battery pack is mounted on the upper and lower frames, and the cam follower mounting bracket of the battery pack is mounted on the upper and lower frames, and the cam follower mounting bracket of the battery pack is mounted on the upper and lower frames, and the cam follower mounting bracket of the battery pack is mounted on the upper and lower frames, and the cam follower mounting bracket of the battery pack is mounted on the upper and lower frames, and the cam follower mounting bracket of the battery pack is mounted on the upper and lower frames, and the cam follower mounting bracket of the battery pack is mounted on the upper and lower frames, and the cam follower mounting bracket of the battery pack is mounted on the upper and lower frames, and the cam follower mounting bracket of the battery pack is mounted on the upper and lower frames, and the cam follower connecting rod of the battery pack is connected to a driving pressure rod and drives the driving pressure rod to move up and down, and the driving pressure rod is connected to an L-shaped clamping jaw opening and closing transmission swing arm, and the clamping jaw opening and closing transmission swing arm is connected. The closing transmission swing arm can rotate around a horizontal rotating shaft, and the top of the clamping jaw opening and closing transmission swing arm is connected to the driving pressure rod, and the bottom is connected to a horizontally arranged piston rod, and the other end of the piston rod is connected to a pair of L-shaped swing arm push rods arranged on the first mounting frame through a vertical rotating shaft. The front end of each swing arm push rod is respectively connected to one of the clamping jaws, and respectively drives the clamping jaws connected thereto to move horizontally, so that the clamping jaws approach or move away from each other; a clamping jaw cam follower is provided on the top of the first cam follower, and the clamping jaw cam follower contacts with the bottom surface of the clamping jaw opening and closing cam, and moves along the bottom surface of the clamping jaw opening and closing cam when the turret rotates to control the opening and closing of the clamping jaw; the kneading wheel assembly includes a rotating frame and a plurality of groups of kneading wheels arranged on the rotating frame, and the kneading wheels are located below the clamping jaws.

[0006] In some embodiments, the smoothing wheel assembly also includes a lifting slide movably arranged on the module mounting frame, a second follower mounting frame movably arranged up and down, a smoothing cam follower arranged on the second follower mounting frame, and a second cam follower connecting rod connecting the second follower mounting frame and the lifting slide, the second follower mounting frame is located below the lifting slide, and the rotating frame is arranged on the lifting slide through a vertical rotating shaft; a smoothing cam is provided on the bottom plate, and the smoothing cam follower is in contact with the top surface of the smoothing cam and moves along the top surface of the smoothing cam when the turret rotates, thereby controlling the lifting slide to move up and down.

[0007] In some embodiments, the turret is provided with a kneading wheel transmission gear and a plurality of kneading wheel transmission sub-gears meshing with the kneading wheel transmission gear and corresponding to each of the kneading modules, and the kneading wheel transmission sub-gears are located on the periphery of the kneading wheel transmission gear; a kneading wheel transmission shaft is provided on the lifting slide, and the kneading wheel transmission shaft is driven by a belt to rotate the rotating shaft connected to the rotating frame, and the kneading wheel transmission shaft is connected to the transmission shaft connected to the kneading wheel transmission sub-gear, and when the kneading wheel transmission sub-gear rotates, it drives the rotating frame to rotate.

[0008] In some embodiments, the flattening cam has an ascending section, a descending section and a straight section. A guide bar is provided above the flattening cam at the starting position of the descending section. When the flattening cam follower moves to the descending section, it moves between the guide bar and the flattening cam.

[0009] In some embodiments, the first mounting bracket can be movably arranged on the module mounting bracket up and down, the bottom surface of the top plate is provided with a positioning cam, the top plate is provided with a fixed height lifting drive unit, a lifting cam is provided below the fixed height lifting drive unit, the fixed height lifting drive unit can control the lifting cam to move up and down, and the lifting cam is provided with a gradually rising track slope; the module mounting bracket is also provided with a positioning assembly, the positioning assembly includes a lifting cam follower, a positioning cam follower, a third mounting bracket, a third cam follower connecting rod, a fixed height shaft, a guide bearing bracket, a positioning swing arm, a translation slider, a swing arm handle, a first positioning clamp arm, a second positioning clamp arm, a first single-tooth rotating block and a second single-tooth rotating block, the first single-tooth rotating block and the second single-tooth rotating block are respectively provided at the ends of the first positioning clamp arm and the second positioning clamp arm, and the teeth of the first single-tooth rotating block and the second single-tooth rotating block are meshed, the first positioning clamp arm and the second positioning clamp arm The arms are respectively arranged on both sides of the fixed height shaft; the lifting cam follower is arranged on a follower bracket connected to the fixed height shaft, the fixed height shaft is connected to the guide bearing frame, the guide bearing frame is connected to the third cam follower connecting rod, and the third cam follower connecting rod is connected to the first mounting frame; the lifting cam follower cooperates with the lifting cam; the positioning cam follower is arranged at the top of the L-shaped positioning swing arm arranged on the third mounting frame through a rotating shaft, the bottom of the positioning swing arm is connected to the translation slider, and the translation slider is provided with a pair of spaced limit blocks, the interval between the limit blocks forms a track groove, and one end of the positioning swing arm is provided with a cam follower located in the track groove; the positioning cam follower contacts the bottom surface of the positioning cam, and controls the first positioning clamping arm and the second positioning clamping arm to clamp the fixed height shaft or release the fixed height shaft during the process of moving along the bottom surface of the positioning cam when the turret rotates.

[0010] In some embodiments, a bearing seat is provided on the base plate, and a turret transmission shaft that drives the turret to rotate passes through the bearing seat and is connected to the turret; a turret transmission gear is provided below the base plate, and the turret transmission gear is provided at the bottom of the turret transmission shaft. When the turret transmission gear rotates, it drives the turret transmission shaft to rotate.

[0011] In some embodiments, a bearing seat is provided on the base plate, and a turret transmission shaft that drives the turret to rotate passes through the bearing seat and is connected to the turret; a turret transmission gear and a flattening wheel driving unit are provided below the base plate, and the turret transmission gear is provided at the bottom of the turret transmission shaft, and when the turret transmission gear rotates, it drives the turret transmission shaft to rotate; a flattening wheel driving transmission shaft is provided in the turret transmission shaft, and the flattening wheel driving transmission shaft passes through the turret transmission shaft, and the flattening wheel transmission gear and the second gear controlled to rotate by the flattening wheel driving unit are provided at both ends.

[0012] In some embodiments, the top plate and the bottom plate are connected by connecting columns arranged at intervals along the circumference to form a fixed frame.

[0013] In some embodiments, a horizontally extending clamping jaw slide rail is provided on the first mounting frame, and the clamping jaw is provided on the clamping jaw slide rail and can move along the clamping jaw slide rail driven by the swing arm push rod.

[0014] In some embodiments, the kneading wheel assembly further comprises a second mounting frame disposed on the module mounting frame, and the second mounting frame is provided with a guide bearing for guiding the up and down movement of the second follower mounting frame.

[0015] As can be seen from the above technical solution, the present invention is provided with a rotatable turret, and multiple sets of flattening modules are provided on the turret. The flattening modules are used to clamp the battery cells with claws that are mechanically driven by a cam structure. The connecting rod mechanism is combined with the cam track transmission to drive the piston rod to move backward, and the piston rod's backward movement is used to control the closing of the claws. When the battery cells are flattened, the claws are controlled by the cam to maintain the clamping state. After the battery cells are completely flattened, they are handed over to the next workstation. At this time, the connecting rod mechanism is combined with the cam track transmission to drive the piston rod to move forward, and the piston rod's forward movement is used to control the opening of the claws until the handover to the next workstation is completed. This mechanically driven claw mechanism circumvents the limitations of the cylinder control including the response time, improves equipment efficiency, and ensures the accuracy of equipment and products.

[0016] In some embodiments, a positioning assembly is also provided, which also adopts a mechanical drive mode. The connecting rod mechanism is combined with the cam track to lift the clamping claw, and then locks the height setting shaft to complete the height setting and positioning action to improve the flattening accuracy and quality. Moreover, the positioning is a cam-driven mechanical structure, and does not use pneumatic components for control, which can avoid affecting the equipment efficiency due to the increase in reaction time caused by the pneumatic structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 This is a schematic structural diagram of a battery cell flattening device according to an embodiment of the present invention;

[0019] Figure 2 For the Figure 1 Cross-sectional view along line AA;

[0020] Figure 3 This is a structural schematic diagram of the battery cell flattening device from another angle according to an embodiment of the present invention;

[0021] Figure 4 This is a schematic structural diagram of a turret according to an embodiment of the present invention;

[0022] Figure 5 This is a structural diagram of a flattening module according to an embodiment of the present invention;

[0023] Figure 6 This is a structural diagram of the flattening module from another angle according to an embodiment of the present invention;

[0024] Figure 7 This is a schematic structural diagram of a battery cell clamping assembly according to an embodiment of the present invention;

[0025] Figure 8 This is a structural schematic diagram of a battery cell clamping assembly from another angle according to an embodiment of the present invention;

[0026] Figure 9 For the Figure 7 Cross-sectional view along the midline BB;

[0027] Figure 10 This is a schematic structural diagram of a flattening wheel assembly according to an embodiment of the present invention;

[0028] Figure 11 This is a structural schematic diagram of the flattening wheel assembly from another angle according to an embodiment of the present invention;

[0029] Figure 12This is a schematic structural diagram of a positioning component according to an embodiment of the present invention;

[0030] Figure 13 This is a structural schematic diagram of a positioning assembly according to an embodiment of the present invention from another angle;

[0031] Figure 14 This is a schematic diagram of a positioning clamp arm clamping a height-fixing shaft according to an embodiment of the present invention.

[0032] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings. DETAILED DESCRIPTION

[0033] The present invention is described in detail below in conjunction with the accompanying drawings. When describing the embodiments of the present invention in detail, for the convenience of explanation, the drawings showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. It should be noted that the drawings are simplified and all use non-precise scales, which are only used to facilitate and clearly assist in explaining the purpose of the embodiments of the present invention. At the same time, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features; the terms "front", "back", "bottom", "upper", "lower", "front", "back", "left", "right", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, 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, and therefore cannot be understood as limiting the present invention.

[0034] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, it can mean a fixed connection, a detachable connection, or an integral connection; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean internal communication between two components; it can mean a wireless connection or a wired connection. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0035] Reference Figure 1 、 Figure 2 、 Figure 3 and Figure 4The battery cell flattening device of this embodiment includes a top plate 1, a bottom plate 2, a turret 3, a flattening wheel drive unit 5, a fixed height lifting drive unit 6, a flattening cam 7, a clamping jaw opening and closing cam 8, a positioning cam 9, a lifting cam 10 and a flattening module 11. The flattening cam 7, the clamping jaw opening and closing cam 8 and the positioning cam 9 of this embodiment are all in the shape of a ring. The surfaces where each cam and the cam follower contact are processed to different heights according to requirements, so that the cam follower can move up and down when moving along the cam surface, and convert this up and down movement into the action of the corresponding component. The fixed height lifting drive unit 6 is arranged on the top plate 1, and the fixed height lifting drive unit 6 is connected to the lifting cam 10 through a connecting piece, which can control the lifting cam 10 to rise or fall.

[0036] Top plate 1 and bottom plate 2 are spaced apart. In this embodiment, top plate 1 is connected to an equipment rack (not shown) via brackets 12. Connecting columns 13 connect the top and bottom plates 2, forming a fixed frame. Connecting columns 13 are evenly spaced along the circumference, with the tops of connecting columns 13 connected to top plate 1 and the bottoms to bottom plate 2.

[0037] The turret 3 is rotatable around its own axis and is arranged between the top plate 1 and the bottom plate 2. Several groups of kneading modules 11 are arranged along the circumference of the turret 3. When the turret 3 rotates, the kneading modules 11 arranged thereon are driven to rotate together. The turret 3 of this embodiment is a three-layer rotating frame. The components of the kneading modules 11 are correspondingly connected to the layers of the rotating frame, thereby being fixed to the rotating frame. In some embodiments, support rods 3-1 can be set between adjacent layers of the turret 3 to maintain the stability of the rotating frame structure through the support rods 3-1.

[0038] In this embodiment, a bearing seat 14 is provided on the base plate 2. A turret drive shaft 15 passes through the bearing seat 14 and is connected to the turret 3. Rotation of the turret drive shaft 15 drives the turret 3 along with it. In this embodiment, a turret drive gear 4 is provided below the base plate 2 and is mounted on the bottom of the turret drive shaft 15. The turret drive gear 4 rotates under the drive of a turret rotation drive unit (not shown), thereby driving the rotation of the turret 3 via the turret drive shaft 15.

[0039] like Figure 5 and Figure 6As shown, the flattening module 11 of this embodiment includes a module mounting frame 11-1 and a battery cell clamping assembly 11-2, a flattening wheel assembly 11-3 and a positioning assembly 11-4 arranged on the module mounting frame 11-1. The battery cell clamping assembly 11-2 is located above the flattening wheel assembly 11-3 (flattening wheel), and its function is to clamp the battery cell so that the battery cell remains in a fixed position, thereby facilitating the flattening operation of the flattening wheel on the end of the battery cell. The function of the positioning assembly 11-4 is to lift the clamping claws in the battery cell clamping assembly 11-2 to a uniform height before flattening begins, and to maintain the height position of the battery cell clamping assembly 11-2. After the clamping claws that clamp the battery cell are lifted, the clamping claws will be kept at this height for flattening.

[0040] Combine Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 and Figure 9 The battery cell clamping assembly 11-2 of this embodiment includes a clamping jaw 11-2a, a first mounting frame 11-2b, a clamping jaw opening and closing transmission swing arm 11-2c, a driving pressure rod 11-2d, a first cam follower mounting frame 11-2e, a first cam follower connecting rod 11-2f, a piston rod 11-2g, a swing arm push rod 11-2h and a clamping jaw slide rail 11-2i.

[0041] A pair of clamping jaws 11-2a are movably mounted on a first mounting frame 11-2b. When the clamping jaws 11-2a translate, they can move closer together to clamp the battery cell, or farther apart to release the cell. The first mounting frame 11-2b is movably mounted on the module mounting frame 11-1. In this embodiment, a first longitudinal guide rail 11-1a extending vertically is provided on the side panels of the module mounting frame 11-1. The first mounting frame 11-2b is mounted on this first longitudinal guide rail 11-1a and can move up and down along this first longitudinal guide rail 11-1a.

[0042] Cam follower mounting bracket 11-2e is mounted on the top plate of module mounting bracket 11-1, and first cam follower connecting rod 11-2f is mounted on cam follower mounting bracket 11-2e so as to be movable up and down. A jaw cam follower (not shown) is mounted on top of first cam follower connecting rod 11-2f. First cam follower connecting rod 11-2f is connected to driving pressure rod 11-2d via a connector. The jaw cam follower serves as the driving component for controlling the opening and closing of the jaws. It contacts the bottom surface of jaw opening and closing cam 8 fixed to top plate 1. When turret 3 rotates, it drives smoothing module 11 to rotate together. During this rotation, the jaw cam follower contacts the bottom surface of jaw opening and closing cam 8. As it moves along the bottom surface of jaw opening and closing cam 8, it moves up and down following the undulating shape of the bottom surface of jaw opening and closing cam 8, thereby driving first cam follower connecting rod 11-2f to move up and down. When the first cam follower connecting rod 11-2f moves up and down, it also drives the driving pressure rod 11-2d connected to it to move up and down.

[0043] The bottom end of the driving pressure rod 11-2d is connected to the L-shaped clamping jaw opening and closing transmission swing arm 11-2c, and the bottom of the clamping jaw opening and closing rotation swing arm 11-2c is connected to a horizontally arranged piston rod 11-2g. The clamping jaw opening and closing transmission swing arm 11-2c can rotate about a horizontally arranged rotation axis a. When the top of the clamping jaw opening and closing transmission swing arm 11-2c moves up and down, the clamping jaw opening and closing transmission swing arm 11-2c rotates about the rotation axis a. During the rotation, the bottom of the clamping jaw opening and closing transmission swing arm 11-2c moves in the horizontal direction, thereby converting the up and down movement of the driving pressure rod 11-2d into the horizontal forward and backward movement of the piston rod 11-2g.

[0044] The axial direction of the piston rod 11-2g is in the horizontal direction. Figure 9 As shown, the other end of the piston rod 11-2g (the end not connected to the rotating swing arm 11-2c) is connected to a pair of L-shaped swing arm push rods 11-2h. The swing arm push rod 11-2h is set on the first mounting frame 11-2b through the rotating shaft a. When the piston rod 11-2g moves horizontally back and forth, it drives the two swing arm push rods 11-2h to open or close. The front end of each swing arm push rod 11-2h is respectively connected to a clamping claw 11-2a. When the swing arm push rod 11-2h is opened or closed, it drives the clamping claw 11-2a connected thereto to move horizontally, so that the two clamping claws 11-2a move closer to each other or farther away from each other. When they move closer to each other, the clamping claws 11-2a can clamp the battery cell. In a specific application, a horizontally extending clamping claw slide rail 11-2i is provided on the first mounting frame 11-2b, and the clamping claw 11-2a is provided on the clamping claw slide rail 11-2i and moves along the clamping claw slide rail 11-2i driven by the swing arm push rod 11-2h.

[0045] like Figure 10 and Figure 11As shown, the kneading wheel assembly 11-3 of this embodiment includes a kneading cam follower 11-3a, a lifting slide 11-3b, a kneading wheel 11-3c, a second mounting frame 11-3d and a kneading wheel transmission shaft 11-3e. The kneading wheel transmission shaft 11-3e of this embodiment adopts a spline shaft.

[0046] Multiple sets of smoothing wheels 11-3c are mounted on a rotating frame 11-3f, spaced apart along the circumference. The rotating frame 11-3f is attached to the lifting carriage 11-3b via a rotating shaft a. When the rotating frame 11-3f rotates, it drives the multiple sets of smoothing wheels 11-3c mounted thereon to rotate together, smoothing the ends of the battery cells during rotation. In this embodiment, the rotating shaft a is connected to the smoothing wheel drive shaft 11-3e via a belt b. When the smoothing wheel drive shaft 11-3e rotates, the belt b drives the rotating shaft a, which in turn drives the rotating frame 11-3f.

[0047] The lifting carriage 11-3b is slidably mounted on the module mounting frame 11-1. In this embodiment, a second longitudinal guide rail 11-1b extending vertically is mounted on the side panel of the module mounting frame 11-1. The lifting carriage 11-3b is mounted on the second longitudinal guide rail 11-1b and is slidably mounted on the second longitudinal guide rail 11-1b.

[0048] In this embodiment, a second mounting frame 11-3d is mounted on the module mounting frame 11-1. The second mounting frame 11-3d is fixed to the module mounting frame 11-1. A guide bearing 11-3g is provided on the second mounting frame 11-3d. A flattening cam follower 11-3a is mounted on the second follower mounting frame 11-3h. The second follower mounting frame 11-3h is connected to the lifting carriage 11-3b via a second cam follower connecting rod 11-3i. The guide bearing 11-3g guides the vertical movement of the second follower mounting frame 11-3h. The flattening cam follower 11-3a contacts the top surface of the flattening cam 7 fixed to the base plate 2. When the turret 3 rotates, it drives the smoothing module 11 to rotate together. During this rotation, the smoothing cam follower 11-3a contacts the top surface of the smoothing cam 7 and, as it moves along the top surface of the smoothing cam 7, drives the second cam follower connecting rod 11-3i to move up and down along the undulating shape of the top surface of the smoothing cam 7. When the second cam follower connecting rod 11-3i moves up and down, it drives the lifting slide 11-3b to move up and down, so that the smoothing wheel 11-3c can smooth the battery cells up and down.

[0049] To control the vertical movement of the lifting carriage 11-3b, the smoothing cam 7 is machined to have varying heights, including an ascending section, a descending section, and a straight section. The height of the straight section remains constant. When the smoothing cam follower 11-3a moves along the ascending section, it pushes the lifting carriage 11-3b upward. When it moves along the descending section, it pulls the lifting carriage 11-3b downward. When it moves along the straight section, the height of the lifting carriage 11-3b remains constant. When the flattening cam follower 11-3a moves to the descending section of the top surface of the flattening cam 7, in order to ensure that the flattening cam follower 11-3a has a smooth and smooth movement process, preferably, a guide bar 7-1 is provided at the starting position of the descending section of the top surface of the flattening cam 7. The guide bar 7-1 is located above the flattening cam 7 and is correspondingly arranged near the starting position of the descending section. When the flattening cam follower 11-3a moves near the descending section, it will move between the guide bar 7-1 and the top surface of the flattening cam 7. At this time, the guide bar 7-1 can guide the flattening cam follower 11-3a to move along the descending section to prevent the flattening cam follower 11-3a from failing to descend effectively.

[0050] In order to simplify the transmission structure, the rotating frame 11-3f of each flattening module 11 in this embodiment is driven to rotate by the same flattening wheel driving unit 5. Figure 1 、 Figure 2 and Figure 4 As shown, the kneading wheel drive unit 5 of this embodiment is arranged below the base plate 2. The kneading wheel drive unit 5 adopts a motor. The output shaft of the motor is provided with a first gear c. The first gear c and the second gear b are engaged with each other. The second gear b is provided at the bottom end of the kneading wheel drive transmission shaft 16. The motor drives the first gear c to rotate, and the first gear c drives the second gear b engaged with it to rotate, and the second gear b drives the kneading wheel drive transmission shaft 16 to rotate.

[0051] The flattening wheel drive transmission shaft 16 of this embodiment is arranged in the turret transmission shaft 15 through a bearing. The flattening wheel drive transmission shaft 16 passes through the turret transmission shaft 15. A flattening wheel transmission gear 17 is provided at the end of the flattening wheel drive transmission shaft 16 extending out of the turret transmission shaft 15. When the flattening wheel drive shaft 16 rotates, it drives the flattening wheel transmission gear 17 to rotate.

[0052] The flattening wheel transmission gear 17 is meshed with a plurality of flattening wheel transmission sub-gears 18. The flattening wheel transmission sub-gears 18 are located on the periphery of the flattening wheel transmission gear 17. One flattening wheel transmission sub-gear 18 corresponds to the flattening wheel assembly 11-3 of a group of flattening modules 11, and is used to drive the rotation of the rotating frame 11-3f in the flattening wheel assembly 11-3 of the flattening module 11. The flattening wheel transmission sub-gear 18 is arranged on the layer plate of the turret 3. The flattening wheel transmission sub-gear 18 is connected to a spline shaft (drive shaft). The spline shaft and the flattening wheel transmission shaft 11-3e are connected via a coupling. When the flattening wheel transmission sub-gear 18 rotates, the spline shaft drives the rotating frame 11-3f to rotate. This embodiment can drive the flattening wheels in multiple groups of flattening modules to rotate and flatten by using a set of drive units, thereby reducing the number of drive units and simplifying the structure. In addition, the mechanical transmission structure can ensure the synchronous rotation of the flattening wheels of each group of flattening modules.

[0053] like Figure 12 and Figure 13 As shown, the positioning assembly 11-4 of this embodiment includes a lifting cam follower 11-4a, a positioning cam follower 11-4b, a third mounting frame 11-4c, a third cam follower connecting rod 11-4d, a fixed height shaft 11-4e, a guide bearing frame 11-4f, a positioning swing arm 11-4g, a translation slider 11-4h, a swing arm handle 11-4i, a first positioning clamping arm 11-4k, a second positioning clamping arm 11-4l, a first single-tooth rotating block 11-4m and a second single-tooth rotating block 11-4n, and the two single-tooth rotating blocks are respectively arranged at the ends of the two positioning clamping arms 11-4k, and the teeth of the two single-tooth rotating blocks are engaged with each other.

[0054] The lifting cam follower 11-4a is arranged on the follower bracket 11-4q, the follower bracket 11-4b is connected to the fixed height shaft 11-4e, the fixed height shaft 11-4e is connected to the guide bearing frame 11-4f, the guide bearing frame 11-4f is connected to the third cam follower connecting rod 11-4d, and the third cam follower connecting rod 11-4d is connected to the first mounting frame 11-2b of the battery cell clamping assembly 11-2.

[0055] The lifting cam follower 11-4a cooperates with the lifting cam 10 located below the top plate 1 to uniformly raise the cell clamping assemblies 11-2 of each flattening module 11 to a preset height. The lifting cam 10 is machined with a gradually rising track slope. When the lifting cam follower 11-4a rotates with the turret 3 to the position of the lifting cam 10, it moves upward along the track slope. Simultaneously, under the control of the fixed height lifting drive unit 6, the lifting cam 10 also moves upward a certain distance, thereby lifting the cell clamping assemblies 11-2 upward.

[0056] The positioning cam follower 11-4b is arranged at the top of the L-shaped positioning swing arm 11-4g. The positioning swing arm 11-4g is arranged on the third mounting frame 11-4c via the rotating shaft a, and the bottom is connected to the translation slider 11-4h. The positioning cam follower contacts the bottom surface of the positioning cam 9 fixed to the top plate 1. When the turret 3 rotates, it will drive the flattening module 11 to rotate together. The positioning cam follower 11-4b contacts the bottom surface of the positioning cam 9 during this rotation process. As it moves along the bottom surface of the positioning cam 9, it drives the top of the positioning swing arm 11-4g to move up and down along the undulating shape of the bottom surface of the positioning cam 9. Since the positioning swing arm 11-4g is L-shaped, when its top moves up and down, it drives the positioning swing arm 11-4g to rotate around the rotating shaft a, converting the up and down movement of the top to horizontal movement of the bottom, and then drives the translation slider 11-4h to move horizontally on the third mounting frame 11-4c.

[0057] The translating slider 11-4h is provided with a pair of spaced-apart limit blocks 11-4j. The gap between the limit blocks 11-4j forms a track groove. A cam follower e is provided at one end of the positioning swing arm 11-4c. The cam follower e is located within the track groove between the limit blocks 11-4j. When the translating slider 11-4h moves horizontally with the positioning swing arm 11-4g, the positioning swing arm 11-4c also swings accordingly. In this embodiment, a horizontally extending transverse guide rail g is provided on the third mounting frame 11-4c. The translating slider 11-4h is mounted on the transverse guide rail g and can move along the transverse guide rail g.

[0058] like Figure 14 As shown, the first positioning clamp arm 11-4k and the second positioning clamp arm 11-4l are respectively arranged on both sides of the height-fixing shaft 11-4e. The other end of the positioning swing arm 11-4c (the end without the cam follower) is connected to the first single-tooth rotating block 11-4m. When the positioning swing arm 11-4c swings horizontally under the drive of the translation slider 11-4h, it will drive the first single-tooth rotating block 11-4m to rotate. During the rotation, the teeth of the first single-tooth rotating block 11-4m will hit the teeth on the second single-tooth rotating block 11-4n, driving the second single-tooth rotating block 11-4n to rotate. When the two single-tooth rotating blocks rotate, they drive the two positioning clamp arms to open or close. When closed, the positioning clamp arms clamp the height-fixing shaft 11-4e, so that the height-fixing shaft 11-4e cannot move up and down, thereby keeping the raised battery cell clamping assembly 11-2 at the raised height, so that the flattening wheel can flatten the battery cell.

[0059] The operation process of the battery cell flattening device of this embodiment will be described below with reference to the accompanying drawings.

[0060] When the turret 3 rotates, it will drive the flattening modules 11 arranged thereon to pass through the battery cell loading station and the lifting station in sequence. During the rotation process, the flattening wheel assembly 11-3 flattens the battery cells, and at the unloading station, the battery cell clamping assembly 11-3 releases the battery cells.

[0061] Specifically, when the turret transmission gear 4 is driven by the turret rotation drive unit to rotate, it drives the turret transmission shaft 15 to rotate, and the turret transmission shaft 15 drives the turret 3 to rotate together.

[0062] As the turret 3 rotates, the flattening module 11 also rotates. During this process, the jaw cam follower contacts the bottom surface of the jaw opening and closing cam 8 and drives the first cam follower connecting rod 11-2f to move up and down along the shape of the bottom surface of the jaw opening and closing cam 8. The up and down movement of the first cam follower connecting rod 11-2f is transmitted to the piston rod 11-2g through the driving pressure rod 11-2d and the jaw opening and closing transmission swing arm 11-2c, and is converted into horizontal forward and backward movement of the piston rod 11-2g. The piston rod 11-2g drives the jaws 11-2a toward each other through a pair of swing arm push rods 11-2h, thereby clamping the battery cell delivered from the previous workstation. This embodiment controls the opening and closing of the jaws through a mechanical method of cam transmission, solving the problem of pneumatic jaws affecting efficiency due to reaction time. Moreover, the shape of the bottom surface of the jaw opening and closing cam 8 can be used to control the jaw to maintain a clamping state until the battery cell is flattened. The jaw cam follower will then change its movement trajectory as the shape of the bottom surface of the jaw opening and closing cam 8 changes, causing the jaw to release the battery cell.

[0063] As the turret 3 rotates, when the flattening module 11 holding the battery cell comes to the lifting station, the lifting cam follower 11-4a and the lifting cam 10 cooperate, and the lifting cam follower 11-4a moves along the track slope on the lifting cam 10. At the same time, the fixed height lifting drive unit 6 will also control the lifting cam 10 to rise to the preset height, realizing the fixed height lifting of the battery cell clamping assembly 11-3 (grip) to ensure the accuracy of battery cell flattening.

[0064] When the clamping claws that clamp the battery cell complete the lifting action, the two positioning clamping arms in the positioning assembly 11-4 clamp the finalization shaft 11-4e as the positioning cam follower 11-4b moves along the bottom surface of the positioning cam 9, so that the first mounting frame 11-2b connected to the height-fixing shaft 11-4e through the third cam follower connecting rod 11-4d cannot move up and down, but maintains a constant height, so that the flattening wheel can flatten the battery cell, ensure stability during the flattening process, and ensure flattening accuracy.

[0065] The clamping jaws of this embodiment are mechanically driven. The connecting rod mechanism is combined with the cam track transmission to drive the piston rod to move backward. The backward movement of the piston rod is used to control the closing of the clamping jaws. When the battery cell is flattened, the clamping jaws are controlled by the cam to maintain the clamping state. After the battery cell is completely flattened, the battery cell is handed over to the next workstation. At this time, the connecting rod mechanism is combined with the cam track transmission to drive the piston rod to move forward. The forward movement of the piston rod is used to control the opening of the clamping jaws until the handover to the next workstation is completed. This mechanically driven clamping jaw mechanism circumvents the limitations of cylinder control including response time, improves equipment efficiency, and ensures equipment and product accuracy. In some embodiments, a positioning component is provided, and the positioning component is also mechanically driven. The connecting rod mechanism is combined with the cam track to lift the clamping jaws, and then locks the height setting shaft to complete the height setting and positioning action to improve the flattening accuracy and quality. Moreover, the positioning is a cam-driven mechanical structure, and is not controlled by pneumatic components. This can avoid affecting the equipment efficiency due to the increased reaction time of the pneumatic structure.

[0066] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is to be construed in the widest manner consistent with the principles and novel features disclosed herein.

Claims

1. A battery cell flattening device, characterized in that: include: A top plate and a bottom plate are spaced apart from each other, and a clamping jaw opening and closing cam is provided on the bottom surface of the top plate; A turret is rotatably arranged around its own axis between the top plate and the bottom plate, and the turret is provided with multiple groups of kneading dies arranged along the circumference; The flattening module includes a module mounting frame, and a cell clamping assembly and a flattening wheel assembly arranged on the module mounting frame; The cam follower mounting bracket is mounted on the module mounting bracket, and a first cam follower connecting rod is mounted on the cam follower mounting bracket and is movable up and down. The first cam follower connecting rod is connected to a driving pressure rod and drives the driving pressure rod to move up and down. The driving pressure rod is connected to an L-shaped clamping jaw opening and closing transmission swing arm, and the clamping jaw opening and closing transmission swing arm can rotate around a horizontal rotating shaft. The top of the clamping jaw opening and closing transmission swing arm is connected to the driving pressure rod, and the bottom is connected to a horizontally arranged piston rod. The other end of the piston rod is connected to a pair of L-shaped swing arm push rods arranged on the first mounting bracket via a vertical rotating shaft. The front end of each swing arm push rod is respectively connected to one of the clamping jaws, and respectively drives the clamping jaws connected thereto to move horizontally, so that the clamping jaws move closer to or away from each other. A jaw cam follower is provided on the top of the first cam follower, the jaw cam follower contacts the bottom surface of the jaw opening and closing cam, and moves along the bottom surface of the jaw opening and closing cam when the turret rotates to control the opening and closing of the jaw; The kneading wheel assembly includes a rotating frame and a plurality of kneading wheels arranged on the rotating frame, and the kneading wheels are located below the clamping claws.

2. The battery cell flattening device according to claim 1, characterized in that: The smoothing wheel assembly further includes a lifting slide movably mounted on the module mounting frame, a second follower mounting frame movably mounted on the module mounting frame, a smoothing cam follower mounted on the second follower mounting frame, and a second cam follower connecting rod connecting the second follower mounting frame and the lifting slide, wherein the second follower mounting frame is located below the lifting slide, and the rotating frame is mounted on the lifting slide via a vertical rotating shaft; A flattening cam is provided on the bottom plate. The flattening cam follower contacts the top surface of the flattening cam and moves along the top surface of the flattening cam when the turret rotates, thereby controlling the lifting slide to move up and down.

3. The battery cell flattening device according to claim 2, characterized in that: The turret is provided with a kneading wheel transmission gear and a plurality of kneading wheel transmission sub-gears meshing with the kneading wheel transmission gear and corresponding to each of the kneading modules, wherein the kneading wheel transmission sub-gears are located on the periphery of the kneading wheel transmission gear; A flattening wheel transmission shaft is provided on the lifting slide, and the flattening wheel transmission shaft drives the rotating shaft connected to the rotating frame to rotate through a belt. The flattening wheel transmission shaft is connected to the transmission shaft connected to the flattening wheel transmission sub-gear. When the flattening wheel transmission sub-gear rotates, the rotating frame is driven to rotate.

4. The battery cell flattening device according to claim 2, characterized in that: The flattening cam has an ascending section, a descending section and a straight section. A guide bar located above the flattening cam is provided at the starting position of the descending section. When the flattening cam follower moves to the descending section, it moves between the guide bar and the flattening cam.

5. The battery cell flattening device according to claim 1, characterized in that: The first mounting frame is movably mounted on the module mounting frame, the bottom surface of the top plate is provided with a positioning cam, a fixed height lifting drive unit is provided on the top plate, a lifting cam is provided below the fixed height lifting drive unit, the fixed height lifting drive unit can control the lifting cam to move up and down, and the lifting cam is provided with a gradually rising track slope; The module mounting frame is also provided with a positioning assembly, and the positioning assembly includes a lifting cam follower, a positioning cam follower, a third mounting frame, a third cam follower connecting rod, a height-fixing shaft, a guide bearing frame, a positioning swing arm, a translation slider, a swing arm handle, a first positioning clamping arm, a second positioning clamping arm, a first single-tooth rotating block and a second single-tooth rotating block, the first single-tooth rotating block and the second single-tooth rotating block are respectively arranged at the ends of the first positioning clamping arm and the second positioning clamping arm, and the teeth of the first single-tooth rotating block and the second single-tooth rotating block are meshed, and the first positioning clamping arm and the second positioning clamping arm are respectively arranged on both sides of the height-fixing shaft; The lifting cam follower is arranged on a follower bracket connected to the height-fixing shaft, the height-fixing shaft is connected to the guide bearing frame, the guide bearing frame is connected to the third cam follower connecting rod, the third cam follower connecting rod is connected to the first mounting frame; the lifting cam follower cooperates with the lifting cam; The positioning cam follower is arranged on the top of an L-shaped positioning swing arm which is arranged on the third mounting frame via a rotating shaft. The bottom of the positioning swing arm is connected to the translation slider. The translation slider is provided with a pair of spaced limit blocks. The space between the limit blocks forms a track groove. One end of the positioning swing arm is provided with a cam follower located in the track groove. The positioning cam follower contacts the bottom surface of the positioning cam and controls the first positioning clamping arm and the second positioning clamping arm to clamp the height-fixing shaft or release the height-fixing shaft during the process of moving along the bottom surface of the positioning cam when the turret rotates.

6. The battery cell flattening device according to claim 1, characterized in that: A bearing seat is provided on the bottom plate, and a turret transmission shaft that drives the turret to rotate passes through the bearing seat and is connected to the turret; A turret transmission gear is provided below the base plate. The turret transmission gear is provided at the bottom of the turret transmission shaft. When the turret transmission gear rotates, the turret transmission shaft is driven to rotate.

7. The battery cell flattening device according to claim 3, characterized in that: A bearing seat is provided on the bottom plate, and a turret transmission shaft that drives the turret to rotate passes through the bearing seat and is connected to the turret; A turret transmission gear and a flattening wheel driving unit are provided below the bottom plate. The turret transmission gear is provided at the bottom of the turret transmission shaft. When the turret transmission gear rotates, the turret transmission shaft is driven to rotate. A flattening wheel driving transmission shaft is provided in the turret transmission shaft. The flattening wheel driving transmission shaft passes through the turret transmission shaft. The flattening wheel transmission gear and the second gear controlled to rotate by the flattening wheel driving unit are respectively provided at both ends.

8. The battery cell flattening device according to claim 1, characterized in that: The top plate and the bottom plate are connected via connecting columns arranged at intervals along the circumference to form a fixed frame.

9. The battery cell flattening device according to claim 1, characterized in that: The first mounting frame is provided with a horizontally extending clamping claw slide rail, the clamping claw is arranged on the clamping claw slide rail, and can move along the clamping claw slide rail under the drive of the swing arm push rod.

10. The battery cell flattening device according to claim 2, characterized in that: The kneading wheel assembly further comprises a second mounting frame arranged on the module mounting frame, and the second mounting frame is provided with a guide bearing for guiding the up and down movement of the second follower mounting frame.

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