Film stacking unit, wafer stacking unit and battery production line

Abstract

The present invention provides a film stacking device, a laminating device, and a battery production line, wherein the film stacking device includes: a feeding mechanism for providing a diaphragm; a cutting mechanism disposed downstream of the feeding mechanism, the cutting mechanism for cutting the diaphragm; a film laying mechanism disposed downstream of the cutting mechanism, the film laying mechanism including a first frame, a roller, a first drive structure, and a second drive structure, the first drive structure for driving the roller to move horizontally relative to the first frame, the roller having a first position close to the cutting mechanism and a second position away from the cutting mechanism, the roller having a film-grabbing state and a release state, and the second drive structure for driving the roller to rotate in the first direction or the second direction. In the above structure, only one feeding mechanism can be disposed on the side of the laminating table to achieve the laying of the diaphragm in two directions, thereby reducing the space occupied by the film stacking device in the horizontal direction and not occupying additional vertical space, making the overall volume of the film stacking device smaller.

Description

Technical Field

[0001] This invention relates to the field of battery production equipment technology, specifically to a film stacking device, a wafer stacking device, and a battery production line. Background Technology

[0002] Stacking is a crucial process in battery production. In stacking, positive electrode sheets, separators, and negative electrode sheets are repeatedly stacked to form a battery cell. During stacking, the unwound separator needs to be laid on a stacking table. In existing stacking technologies, separator laying typically employs two methods: One method involves placing unwinding mechanisms on both sides of the stacking table, with separator clamps holding the separator at each mechanism for reciprocating laying. While this structure offers high laying efficiency, the two unwinding mechanisms occupy significant space, resulting in a larger overall stacking unit. The other method places the unwinding mechanism above the stacking table, unwinding the separator downwards. The separator is laid in a "Z" pattern by the reciprocating movement of oscillating rollers. This structure requires only one unwinding mechanism but occupies space above the stacking table, limiting the flexibility of the stacking unit's layout. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the stacking equipment occupies a large space in the existing battery stacking process, resulting in a large stacking device, thereby providing a stacking device, a stacking device and a battery production line.

[0004] To address the aforementioned problems, the present invention provides a film stacking apparatus, comprising: a feeding mechanism for providing a diaphragm; a cutting mechanism disposed downstream of the feeding mechanism for cutting the diaphragm; and a film laying mechanism disposed downstream of the cutting mechanism. The film laying mechanism includes a first frame, a roller, a first driving structure, and a second driving structure. The first driving structure drives the roller to move horizontally relative to the first frame, and positions the roller in a first position close to the cutting mechanism and a second position away from the cutting mechanism. The roller has a film-grabbing state and a releasing state. The second driving structure drives the roller to rotate in the first or second direction. The movement of the roller from the first position to the second position, or from the second position to the first position, enables the diaphragm to be laid on the stacking table.

[0005] Optionally, the roller includes: a first mounting base connected to the drive end of the second drive structure; a first clamping plate and a second clamping plate, both movably disposed on the first mounting base, the first clamping plate and the second clamping plate being able to move closer to or further away from each other.

[0006] Optionally, the roller further includes a first elastic element and a second elastic element, both of which are disposed on the first mounting base. The first elastic element is adapted to apply an elastic force toward the second clamping plate to the first clamping plate, and the second elastic element is adapted to apply an elastic force toward the first clamping plate to the second clamping plate.

[0007] Optionally, the film stacking device further includes a clamping mechanism, which includes: a second mounting base; a pusher top movably disposed on the second mounting base; and a third drive structure disposed on the second mounting base and used to drive the pusher top to extend or retract, wherein when the pusher top is in the extended state, the pusher top can open the first clamping plate and the second clamping plate so that the roll is in the loosened state.

[0008] Optionally, the roller further includes a first slide plate and a second slide plate, both of which are movably mounted on a first mounting base. A first clamping plate is mounted on the first slide plate, a first elastic element is connected between the first mounting base and the first slide plate, a second clamping plate is mounted on the second slide plate, and a second elastic element is connected between the first mounting base and the second slide plate. A first protrusion is provided on the first slide plate, and a second protrusion is provided on the second slide plate. The first and second protrusions are arranged opposite to each other. The end of the pusher includes a tapered portion. When the pusher is in the extended state, it can drive the first and second protrusions to move away from each other.

[0009] Optionally, the clamping mechanism is located at the first position; or, there are two clamping mechanisms, which are respectively located at the first position and the second position.

[0010] Optionally, there are two film-laying mechanisms. In the direction perpendicular to the diaphragm flow, the two film-laying mechanisms are located on both sides of the feeding mechanism. In the direction of the diaphragm flow, the rolls of the two film-laying mechanisms are arranged opposite to each other. The film-laying mechanism also includes a fourth driving structure for driving the rolls to move vertically relative to the first frame.

[0011] Optionally, the film stacking device also includes a film clamping mechanism, which is located upstream of the cutting mechanism and is capable of clamping or releasing the diaphragm.

[0012] Optionally, the film clamping mechanism includes a third mounting base, a third clamping plate, a fourth clamping plate, and a fifth driving structure. At least one of the third clamping plate and the fourth clamping plate is movably disposed on the third mounting base, and the fifth driving structure is used to drive the third clamping plate and the fourth clamping plate to move closer to each other or further away from each other.

[0013] Optionally, the cutting mechanism includes a fourth mounting base, a cutting strip, and a sixth drive structure. The fourth mounting base is movably mounted on the third mounting base, the cutting strip is mounted on the fourth mounting base and located downstream of the third and fourth clamping plates, and the sixth drive structure drives the fourth mounting base to move vertically.

[0014] Optionally, at least one end of the cutting bar is provided with a seventh drive structure, which is disposed on the fourth mounting base and is used to apply an outward pulling force to the end of the cutting bar.

[0015] Optionally, the film stacking device also includes a web-aligning mechanism, which is disposed between the feeding mechanism and the film clamping mechanism.

[0016] Optionally, along the flow direction of the diaphragm, the correction mechanism includes a guide roller, a detection structure, and a correction roller. The correction mechanism also includes an eighth drive structure for driving the cutting mechanism, the clamping mechanism, and the correction roller to move synchronously along the flow direction perpendicular to the diaphragm.

[0017] Optionally, the film stacking device further includes a second frame, a fifth mounting base, and a ninth drive structure. The fifth mounting base is movably mounted on the second frame, and the ninth drive structure is used to drive the fifth mounting base to move upstream or downstream relative to the second frame along the direction of diaphragm flow. The cutting mechanism, the film clamping mechanism, and the correction mechanism are all mounted on the fifth mounting base.

[0018] Optionally, the membrane stacking device also includes a slitting mechanism located downstream of the cutting mechanism, which is used to cut the diaphragm into multiple strips.

[0019] Optionally, the slitting mechanism includes a sixth mounting base, a seventh mounting base, a blade, a tenth drive structure, and an adjustment structure. The seventh mounting base is movably mounted on the sixth mounting base, the tenth drive structure is mounted on the seventh mounting base, the blade is mounted on the drive end of the tenth drive structure, the tenth drive structure can drive the blade to extend or retract, and the adjustment structure is used to adjust the relative position of the seventh mounting base with respect to the sixth mounting base.

[0020] Optionally, along the flow direction of the diaphragm, the feeding mechanism includes an unwinding roller, a pressure roller, an electrostatic elimination structure, a tensioning structure, and a buffer structure.

[0021] Optionally, the feeding mechanism also includes an eighth mounting base and an eleventh drive structure, wherein the unwinding roller is movably mounted on the eighth mounting base and the eleventh drive structure drives the unwinding roller to move along its axial direction.

[0022] The present invention also provides a stacking apparatus, comprising: a stacking stage; a film stacking device, wherein the film stacking device is the aforementioned film stacking device, and a film laying mechanism is disposed on the side of the stacking stage; a wafer forming mechanism for providing a positive electrode and a negative electrode; and a transport mechanism for transporting the positive electrode and the negative electrode to the stacking stage.

[0023] This application also provides a battery production line, including the aforementioned stacking apparatus.

[0024] The present invention has the following advantages:

[0025] Using the technical solution of this invention, during the membrane laying process, a first driving structure drives a roller to move to a first position, where the roller grips and fixes the membrane. A second driving structure drives the roller to rotate along a first direction to buffer the membrane. Then, the first driving structure drives the roller to move from the first position to a second position and from the second position back to the first position. During this movement, the second driving structure drives the roller to rotate along a second direction, releasing the buffered membrane and laying it on the stacking table. This allows for membrane laying from two directions (from the first position to the second position and from the second position to the first position). In this structure, only one feeding mechanism needs to be provided on the side of the stacking table to achieve membrane laying in two directions, reducing the horizontal space occupied by the stacking device and eliminating the need for additional vertical space, resulting in a smaller overall size of the stacking device. Therefore, the technical solution of this invention solves the problem of large space occupation and large size of the stacking device in the prior art battery stacking process. Attached Figure Description

[0026] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 A schematic diagram of the structure of the film stacking device of the present invention is shown;

[0028] Figure 2 It shows Figure 1 Enlarged view of point A in the middle;

[0029] Figure 3 It shows Figure 1 A schematic diagram of the feeding mechanism of the intermediate film stacking unit;

[0030] Figure 4 It shows Figure 3 A schematic diagram of the unwinding roller, the eighth mounting base, and the eleventh drive structure of the feeding mechanism;

[0031] Figure 5 It shows Figure 1 A schematic diagram of the correction mechanism, clamping mechanism, cutting mechanism and slitting mechanism of the intermediate film stacking device;

[0032] Figure 6 It shows Figure 5 A schematic diagram of the detection structure of the center correction mechanism;

[0033] Figure 7 It shows Figure 5 A schematic diagram of the structure of the interlocking membrane mechanism and the cutting mechanism from one side view;

[0034] Figure 8 It shows Figure 5 A schematic diagram of the structure from another side view of the interlocking membrane mechanism and the cutting mechanism;

[0035] Figure 9 It shows Figure 5 Schematic diagram of the middle cutting mechanism;

[0036] Figure 10 It shows Figure 1 A schematic diagram of the film-laying mechanism in a mid-layer film stacking unit;

[0037] Figure 11 It shows Figure 10 A schematic diagram of the structure of the roll in the mid-film layup structure;

[0038] Figure 12 It shows Figure 1 A schematic diagram of the clamping mechanism and the winding rollers of the intermediate film stacking device;

[0039] Figure 13 It shows Figure 12 Enlarged view of point B in the middle;

[0040] Figure 14 It shows Figure 1 A schematic diagram of the two film-laying mechanisms in the mid-layer film stacking unit;

[0041] Figure 15 A schematic diagram of the stacking stage is shown;

[0042] Figure 16 It shows Figure 1 A schematic diagram of step one of the first membrane laying method in the mid-layer membrane device;

[0043] Figure 17 It shows Figure 1 A schematic diagram of step two of the first method of laying the diaphragm in the mid-layer membrane device;

[0044] Figure 18 It shows Figure 1 A schematic diagram of step three of the first method of laying the diaphragm in the mid-layer membrane device;

[0045] Figure 19 It shows Figure 1 A schematic diagram of step four of the first method of laying the diaphragm in the mid-layer membrane device;

[0046] Figure 20 It shows Figure 1A schematic diagram of step five of the first method of laying the diaphragm in the mid-layer membrane device;

[0047] Figure 21 It shows Figure 1 A schematic diagram of step one of the second diaphragm laying method in the mid-layer membrane device;

[0048] Figure 22 It shows Figure 1 A schematic diagram of step two of the second method for laying the diaphragm in the mid-layer membrane device;

[0049] Figure 23 It shows Figure 1 A schematic diagram of step three of the second diaphragm laying method in the mid-layer membrane device;

[0050] Figure 24 It shows Figure 1 A schematic diagram of step four of the second diaphragm laying method in the mid-layer membrane device;

[0051] Figure 25 It shows Figure 1 A schematic diagram of step five of the second diaphragm laying method in the mid-layer membrane device;

[0052] Figure 26 It shows Figure 1 A schematic diagram of step six of the second diaphragm laying method in the mid-layer membrane device;

[0053] Figure 27 It shows Figure 1 A schematic diagram of step seven of the second diaphragm laying method in the mid-layer membrane device;

[0054] Figure 28 It shows Figure 1 A schematic diagram of step eight of the second method of laying the diaphragm in the mid-layer membrane device.

[0055] Explanation of reference numerals in the attached figures:

[0056] 1. Diaphragm; 2. Stacking table; 10. Feeding mechanism; 11. Unwind roller; 12. Pressure roller; 13. Static elimination structure; 14. Tensioning structure; 15. Buffer structure; 16. Eighth mounting base; 17. Eleventh drive structure; 20. Cutting mechanism; 21. Fourth mounting base; 22. Cutting strip; 23. Sixth drive structure; 24. Seventh drive structure; 30. Film laying mechanism; 31. First frame; 32. Winding roller; 3201. First winding roller; 3202. Second winding roller; 321. First mounting base; 322. First clamping plate; 323. Second clamping plate; 324. First elastic element; 325. Second elastic element; 326. First sliding plate; 3261. First protrusion; 327. Second sliding plate; 327 1. Second protrusion; 33. First drive structure; 34. Second drive structure; 35. Fourth drive structure; 40. Clamping mechanism; 41. Second mounting base; 42. Push top; 421. Conical part; 43. Third drive structure; 50. Film clamping mechanism; 51. Third mounting base; 52. Third clamping plate; 53. Fourth clamping plate; 54. Fifth drive structure; 60. Correction mechanism; 61. Overhead roller; 62. Detection structure; 63. Correction roller; 64. Eighth drive structure; 70. Second frame; 80. Fifth mounting base; 90. Ninth drive structure; 100. Slitting mechanism; 101. Sixth mounting base; 102. Seventh mounting base; 103. Blade; 104. Tenth drive structure; 105. Adjustment structure. Detailed Implementation

[0057] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0058] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0059] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0060] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0061] like Figures 1 to 27 As shown, an embodiment of the film-laminating apparatus according to this application includes a feeding mechanism 10, a cutting mechanism 20, and a film-laying mechanism 30. The feeding mechanism 10 is used to provide the diaphragm 1. The cutting mechanism 20 is located downstream of the feeding mechanism 10 and is used to cut the diaphragm 1. The film-laying mechanism 30 is located downstream of the cutting mechanism 20 and includes a first frame 31, a roller 32, a first drive structure 33, and a second drive structure 34. The first drive structure 33 drives the roller 32 to move horizontally relative to the first frame 31, and positions the roller 32 in a first position close to the cutting mechanism 20 and a second position away from the cutting mechanism 20. The roller 32 has a film-grabbing state and a released state, and the second drive structure 34 drives the roller 32 to rotate in either the first or second direction.

[0062] Furthermore, the roller 32 can move from the first position to the second position, or from the second position to the first position, so that the diaphragm 1 can be laid on the stacking table 2.

[0063] Using the technical solution of this embodiment, when laying the diaphragm, the first driving structure 33 drives the roller 32 to move to the first position, where the roller 32 is in a film-grabbing state and fixes the diaphragm 1. The second driving structure 34 drives the roller 32 to rotate along the first direction to buffer the diaphragm 1. Then, the first driving structure 33 drives the roller 32 to move from the first position to the second position and from the second position to the first position. During the movement, the second driving structure 34 drives the roller 32 to rotate along the second direction, thereby releasing the buffered diaphragm 1 and laying the diaphragm 1 on the stacking table 2. It can also lay the diaphragm 1 from two directions (the direction from the first position to the second position and the direction from the second position to the first position). In the above structure, only one feeding mechanism 10 needs to be provided on the side of the stacking table 2 to lay the diaphragm 1 in two directions, reducing the horizontal space occupied by the stacking device and not occupying additional vertical space, making the overall volume of the stacking device smaller. Therefore, the technical solution of this embodiment solves the defect in the prior art battery stacking process where the stacking equipment occupies a large space, resulting in a large stacking device size.

[0064] Combination Figure 1 and Figure 2 As can be seen, in the film stacking device of this embodiment, the diaphragm 1 passes through the feeding mechanism 10, the correction mechanism 60, the film clamping mechanism 50, the cutting mechanism 20, the slitting mechanism 100, and the film laying mechanism 30 in sequence during its laying. To facilitate understanding of the technical solution of this embodiment, the following will first describe each mechanism in detail according to the sequence of the diaphragm 1's flow process.

[0065] I. Material Supply

[0066] like Figures 1 to 3 As shown, along the flow direction of the diaphragm 1, the feeding mechanism 10 includes an unwinding roller 11, a pressure roller 12, an electrostatic elimination structure 13, a tensioning structure 14, and a buffer structure 15.

[0067] In this embodiment, the feeding mechanism 10 functions to unwind the diaphragm 1 and provide it to the downstream process. (See attached...) Figure 4 As can be seen, the unwinding roller 11 is driven to rotate by a motor. During unwinding, the diaphragm roll is placed on the unwinding roller 11. After the motor is started, it can drive the unwinding roller 11 to rotate, thereby unwinding the diaphragm roll.

[0068] Optionally, the unwinding roller 11 can be directly connected to the motor shaft of the motor, or it can be indirectly connected. Figure 4 In the technical solution, the motor shaft of the motor and the unwinding roller 11 are connected by a synchronous belt, that is, indirectly connected.

[0069] Optionally, the unwinding roller 11 is an air-expanding shaft. By inflating or deflating the unwinding roller 11, the diaphragm roll can be clamped or loosened.

[0070] from Figure 3 As can be seen, the pressure roller 12 is positioned downstream of the unwinding roller 11, and its function is to press the diaphragm 1, that is, to tension the diaphragm 1. Furthermore, the pressure roller 12 can be connected to the drive end of the linear drive mechanism, that is, the position of the pressure roller 12 can be adjusted, thereby adjusting the tension.

[0071] In this embodiment, the function of the static elimination structure 13 is to eliminate static electricity on the surface of the diaphragm 1. Figure 3 As can be seen, the static elimination structure 13 is set as two spaced-apart structures, located on both sides of the diaphragm 1 respectively. The two static elimination structures 13 can eliminate static electricity on both sides of the diaphragm 1.

[0072] In this embodiment, the tensioning structure 14 is used to tension the diaphragm 1. Specifically, the tensioning structure 14 includes a rocker arm, the middle of which is connected to the motor shaft of a motor, and tension rollers are provided at both ends of the rocker arm. The diaphragm 1 passes through the two tension rollers from both sides. When the rocker arm swings, it drives the two tension rollers to swing, thereby achieving a tensioning effect on the diaphragm 1. Furthermore, by controlling the swing angle of the rocker arm, the tension of the tension rollers can be controlled.

[0073] like Figure 3 As shown, a buffer structure 15 is provided downstream of the tensioning structure 14. The function of the buffer structure 15 is to buffer the diaphragm 1 when the downstream production cycle slows down, and to release the buffered diaphragm 1 when the downstream production cycle speeds up. Specifically, the buffer structure 15 includes a buffer roller, which is connected to the drive end of a linear drive mechanism and is movable. In this embodiment, the buffer roller can move along... Figure 3 Move in the left and right directions as shown.

[0074] Specifically, when buffer diaphragm 1 is needed, the buffer roller moves in the direction away from the downstream, that is, towards... Figure 3 The movement is shown to the right. When it is necessary to release diaphragm 1, the buffer roller moves downstream, that is, towards... Figure 3 The device moves to the left as shown. This ensures that the feeding and consumption of the film stacking equipment are matched.

[0075] like Figure 4 As shown, in the technical solution of this embodiment, the feeding mechanism 10 further includes an eighth mounting base 16 and an eleventh driving structure 17. The unwinding roller 11 is movably mounted on the eighth mounting base 16, and the eleventh driving structure 17 drives the unwinding roller 11 to move along its axial direction.

[0076] Specifically, the eleventh drive structure 17 performs the first correction on the unwound diaphragm 1. The mounting bracket of the unwinding roller 11 is slidably mounted on the eighth mounting base 16, specifically, the two are connected by a slide rail and a slider. The sliding direction of the unwinding roller 11 is consistent with the axial direction of the unwinding roller 11, that is, the unwinding roller 11 can slide along the axial direction of the unwinding roller 11 on the eighth mounting base 16. Figure 4 It slides in the left and right directions. The eleventh drive structure 17 drives the unwinding roller 11 to slide relative to the eighth mounting base 16.

[0077] Furthermore, the eleventh drive structure 17 is specifically a motor, the motor shaft of which is connected to the rotating shaft of a lead screw nut, and the slider of the lead screw nut is connected to the mounting bracket of the unwinding roller 11. Therefore, when the motor rotates forward or reverse, the unwinding roller 11 can be driven to slide relative to the eighth mounting base 16 through the slider of the lead screw nut.

[0078] Alternatively, the eleventh drive structure 17 can also be a linear drive mechanism such as a drive cylinder.

[0079] Furthermore, a sensor is installed on the flow path of the diaphragm 1 to detect the degree of deviation of the diaphragm 1. When the sensor detects that the degree of deviation of the diaphragm 1 exceeds a threshold, the control system activates the eleventh drive structure 17, thereby driving the unwinding roller 11 to move on the eighth mounting seat 16 until the sensor detects that the position of the diaphragm 1 has returned to the correct position, thus completing the correction.

[0080] Optionally, in this embodiment, the sensor is positioned between the two electrostatic elimination structures 13.

[0081] In addition, the feeding mechanism 10 includes multiple guide rollers, which restrict the flow path of the diaphragm 1 and change its direction. After the diaphragm 1 passes the last guide roller, it is fed to the subsequent mechanism.

[0082] II. Correction

[0083] After the diaphragm 1 is unwound, it needs to be corrected again to ensure the accuracy of subsequent diaphragm 1 laying. That is, after the diaphragm 1 flows out of the feeding mechanism 10, it needs to enter the correction mechanism 60, which is located between the feeding mechanism 10 and the clamping mechanism 50.

[0084] like Figure 5 As shown, in the technical solution of this embodiment, along the flow direction of the diaphragm 1, the correction mechanism 60 includes a roller 61, a detection structure 62 and a correction roller 63. The correction mechanism 60 also includes an eighth drive structure 64, which is used to drive the cutting mechanism 20, the film clamping mechanism 50 and the correction roller 63 to move synchronously along the flow direction perpendicular to the diaphragm 1.

[0085] from Figure 5As can be seen, the function of the roller 61 is to adjust the direction of the flow of the diaphragm 1 into the correction mechanism 60.

[0086] The function of detection structure 62 is to detect the degree of displacement of diaphragm 1. Its specific structure is as follows: Figure 6 As shown, the detection structure 62 includes a mounting plate with a notch on its side. Two sensors are respectively positioned above and below the notch, one of which is a transmitter and the other a receiver (e.g., emitting and receiving light). The diaphragm 1 flows through this notch, thus partially blocking the sensor. The area of ​​the blocked sensor varies depending on the degree of diaphragm 1's offset. The sensor determines whether the offset of the diaphragm 1 exceeds a threshold by detecting the area of ​​the blocked sensor.

[0087] Of course, other conventional detection sensors can also be used for the detection structure 62.

[0088] like Figure 6 As shown, the function of the alignment roller 63 is to adjust the position of the diaphragm 1, restoring it from an offset position to the normal position. The diaphragm passes through the alignment roller 63, and the aforementioned eighth drive structure 64 can drive the alignment roller 63 to move, thereby causing the alignment roller 63 to move the diaphragm 1 through friction, thus achieving position adjustment.

[0089] Furthermore, the eighth drive structure 64 is a linear drive mechanism such as a linear motor and a drive cylinder. The eighth drive structure 64 can drive the correction roller 63 to move along the flow direction perpendicular to the diaphragm, that is, drive the correction roller 63 to move along its axis.

[0090] When the detection structure 62 detects that the offset of the diaphragm 1 exceeds the threshold, the control system activates the eighth drive structure 64, thereby moving the correction roller 63 along its axial direction until the detection structure 62 detects that the position of the diaphragm 1 has returned to the correct position, thus completing the correction.

[0091] Furthermore, from Figure 5 As can be seen, there are two parallel straightening rollers 63, whose relative positions are fixed and move synchronously. When the diaphragm 1 is running on the belt, from... Figure 2 As can be seen, the diaphragm 1 passes through the upper and lower sides of the two alignment rollers 63, respectively. This arrangement results in a large frictional force applied by the alignment rollers 63 to the diaphragm 1, ensuring that the alignment rollers 63 can move the diaphragm 1 through a large frictional force when they move, thereby achieving the alignment effect.

[0092] Of course, when the surface friction of the alignment roller 63 is high, only one alignment roller 63 can be set. Alternatively, two or more alignment rollers 63 can be set, with the diaphragm 1 passing through each alignment roller 63 in an alternating pattern to apply greater friction.

[0093] In addition, in order to ensure that the diaphragm 1 is also corrected in the downstream position of the correction roller 63, in this embodiment, the eighth drive structure 64 needs to drive the correction roller 63, the downstream clamping mechanism 50 and the cutting mechanism 20 (along the flow direction perpendicular to the diaphragm 1) to move synchronously to ensure the consistency of the diaphragm 1 in the upstream and downstream positions.

[0094] In some embodiments not shown, if the unwinding accuracy of the diaphragm 1 is high enough to ensure its positional accuracy, then it is also feasible to omit the correction mechanism 60.

[0095] After passing through the correction roller 63, the diaphragm flows into the subsequent mechanism.

[0096] III. Film clamping and cutting

[0097] After the diaphragm 1 flows out from the alignment mechanism 60, it needs to pass through the clamping mechanism 50 and the cutting mechanism 20 before being laid. The clamping mechanism 50 is located upstream of the cutting mechanism 20, and it can clamp or release the diaphragm 1. The cutting mechanism 20 can cut the diaphragm 1.

[0098] The function of the clamping mechanism 50 is to clamp the diaphragm 1, thereby fixing the diaphragm 1. The function of the cutting mechanism 20 is to cut the diaphragm 1. The timing of clamping and releasing the diaphragm 1 by the clamping mechanism 50, and the timing of cutting the diaphragm 1 by the cutting mechanism 20, will be described in detail below during the diaphragm 1 laying process. This section first introduces the structure of the clamping mechanism 50 and the cutting mechanism 20.

[0099] like Figure 7 and Figure 8 As shown, in this embodiment, the film clamping mechanism 50 includes a third mounting base 51, a third clamping plate 52, a fourth clamping plate 53, and a fifth driving structure 54. At least one of the third clamping plate 52 and the fourth clamping plate 53 is movably disposed on the third mounting base 51, and the fifth driving structure 54 is used to drive the third clamping plate 52 and the fourth clamping plate 53 to move closer to or further away from each other.

[0100] Specifically, the third clamping plate 52 and the fourth clamping plate 53 are both flat plate-like structures, and they are arranged opposite each other. When the third clamping plate 52 and the fourth clamping plate 53 move closer to each other, they can clamp the diaphragm 1; when the third clamping plate 52 and the fourth clamping plate 53 move further apart, they can loosen the diaphragm.

[0101] The third clamping plate 52 and the fourth clamping plate 53 can be configured on the third mounting base 51 in the following ways: 1. Both the third clamping plate 52 and the fourth clamping plate 53 are movably mounted on the third mounting base 51; 2. The third clamping plate 52 is movably mounted on the third mounting base 51, and the fourth clamping plate 53 is fixedly mounted on the third mounting base 51; 3. The third clamping plate 52 is fixedly mounted on the third mounting base 51, and the fourth clamping plate 53 is movably mounted on the third mounting base 51. This embodiment uses the second configuration.

[0102] from Figure 7 As can be seen, the fifth drive structure 54 is a linear drive structure, which can be a linear motor, drive cylinder, etc. The fifth drive structure 54 is mounted on the third mounting base 51 and located below the third clamping plate 52. The drive end of the fifth drive structure 54 is connected to the third clamping plate 52. Those skilled in the art will understand that when the drive end of the fifth drive structure 54 extends, it drives the third clamping plate 52 to move towards the fourth clamping plate 53, that is, to clamp the diaphragm 1. When the drive end of the fifth drive structure 54 retracts, it drives the third clamping plate 52 away from the fourth clamping plate 53, that is, to release the diaphragm 1.

[0103] like Figure 7 and Figure 8 As shown, in this embodiment, the cutting mechanism 20 includes a fourth mounting base 21, a cutting strip 22, and a sixth driving structure 23. The fourth mounting base 21 is movably mounted on the third mounting base 51, and the cutting strip 22 is mounted on the fourth mounting base 21 and located downstream of the third clamping plate 52 and the fourth clamping plate 53. The sixth driving structure 23 drives the fourth mounting base 21 to move vertically.

[0104] Specifically, the fourth mounting base 21 can be mounted on the third mounting base 51 via a guide rail structure. Figure 8 As can be seen, the sixth drive structure 23 is a linear drive structure, which can be a linear motor, drive cylinder, etc. The drive end of the sixth drive structure 23 is connected to the fourth mounting base 21. Those skilled in the art will understand that when the drive end of the sixth drive structure 23 extends, it can drive the fourth mounting base 21 to move upward relative to the third mounting base 51; when the drive end of the sixth drive structure 23 retracts, it can drive the fourth mounting base 21 to move downward relative to the third mounting base 51. Since the cutting strip 22 is set on the fourth mounting base 21, the sixth drive structure 23 can drive the cutting strip 22 to move in the up and down direction. During the movement, the cutting strip 22 passes through the diaphragm 1 and cuts the diaphragm 1.

[0105] Optionally, the cutting strip 22 can be a metal wire. The metal wire heats up when energized and cuts the diaphragm 1 after passing through it.

[0106] Furthermore, from Figure 7 and Figure 8 It can also be seen that the third mounting base 51 has a plate-like structure. The fourth mounting base 21 is disposed on the first surface of the third mounting base 51, and the sixth drive structure 23 is disposed on the first surface of the fourth mounting base 21. Extension plates are provided on both sides of the fourth mounting base 21, and the ends of the extension plates extend from the side of the third mounting base 51 to the front side of the second surface of the third mounting base 51. The two ends of the cutting strip 22 are respectively connected to the two extension plates. The fifth drive structure is disposed on the second surface of the third mounting base 51.

[0107] This arrangement ensures that the fifth drive structure 54 and the sixth drive structure 23 are located on two different surfaces of the third mounting base 51, and their movement strokes do not interfere with each other. Furthermore, it guarantees that the cutting strip 22 is positioned downstream of the third clamping plate 52 and the fourth clamping plate 53.

[0108] In this embodiment, the first surface of the third mounting base 51 is the surface facing the upstream direction, and the second surface of the third mounting base 51 is the surface facing the downstream direction.

[0109] like Figure 7 and Figure 8 As shown, in the technical solution of this embodiment, at least one end of the cutting strip 22 is provided with a seventh driving structure 24. The seventh driving structure 24 is disposed on the fourth mounting base 21 and is used to apply an outward pulling force to the end of the cutting strip 22.

[0110] Specifically, at higher temperatures, the cutting strip 22 may expand, causing it to deviate from a straight line. This results in uneven cuts when cutting the diaphragm 1, affecting the cell quality. By setting a seventh drive structure 24, the seventh drive structure 24 can apply an outward pulling force to the end of the cutting strip 22, ensuring that the cutting strip 22 remains taut at different temperatures and guaranteeing the cutting quality of the diaphragm 1.

[0111] from Figure 7 and Figure 8 As can be seen, one end of the cutting strip 22 is fixed to one of the aforementioned extension plates. The seventh drive structure 24 is optionally a guide rail cylinder, which is mounted on another extension plate. The other end of the cutting strip 22 is connected to the slider of the guide rail cylinder. The guide rail cylinder always applies an outward pulling force to the end of the cutting strip 22 to keep it in a straight state. The applied pulling force should be such that it does not damage the cutting strip 22.

[0112] Of course, the seventh drive structure 24 can also be a linear motor, drive cylinder or other linear drive mechanism.

[0113] In an embodiment not shown, a seventh drive structure 24 may also be provided on both extension plates. In this case, the two ends of the cutting strip 22 are respectively connected to the drive ends of the two seventh drive structures 24. The tension applied by the two seventh drive structures 24 is in opposite directions, further ensuring that the cutting strip 22 is in a taut state.

[0114] IV. Slicing

[0115] like Figure 5 and Figure 9 As shown, in the technical solution of this embodiment, the film stacking device further includes a slitting mechanism 100, which is located downstream of the cutting mechanism 20. The slitting mechanism 100 is used to cut the diaphragm 1 into multiple strips.

[0116] Specifically, from Figure 15 As can be seen, the stacking stage 2 has two stacking positions, so the stacking device in this embodiment can lay the separator for two rows of cells at one time, which is more efficient. Before laying the separator 1, the separator 1 needs to be cut into two rows by the slitting mechanism 100, and the two rows of separator 1 are laid on the two rows of electrode sheets respectively.

[0117] It should be noted that in some embodiments not shown, if the stacking table has only one stacking position, that is, only one row of electrode sheets needs to be laid with diaphragm 1, then there is no need to cut diaphragm 1, that is, it is also a feasible implementation to not set up cutting mechanism 100.

[0118] like Figure 9 As shown, in this embodiment, the slitting mechanism 100 includes a sixth mounting base 101, a seventh mounting base 102, a blade 103, a tenth drive structure 104, and an adjustment structure 105. The seventh mounting base 102 is movably mounted on the sixth mounting base 101, the tenth drive structure 104 is mounted on the seventh mounting base 102, and the blade 103 is mounted on the drive end of the tenth drive structure 104. The tenth drive structure 104 can drive the blade 103 to extend or retract, and the adjustment structure 105 is used to adjust the relative position of the seventh mounting base 102 with respect to the sixth mounting base 101.

[0119] Specifically, the sixth mounting base 101 and the seventh mounting base 102 are both plate-shaped. The seventh mounting base 102 is movably mounted on the sixth mounting base 101, moving horizontally and along a flow direction perpendicular to the diaphragm 1. The movement of the seventh mounting base 102 is guided by structures such as guide rails, slide rails, linear grooves, and protrusions.

[0120] Optionally, the adjustment structure 105 is a micrometer head, which is fixedly mounted on the sixth mounting base 101. The adjustment head of the micrometer head is connected to the side of the seventh mounting base 102. The operator can rotate the micrometer head to control the extension or retraction of its head, thereby fine-tuning the horizontal position of the seventh mounting base 102. When the seventh mounting base 102 moves, it drives the tenth drive structure 104 and the blade 103 to move synchronously, thereby fine-tuning the horizontal position of the blade 103 and ensuring the cutting accuracy of the diaphragm 1.

[0121] Furthermore, from Figure 9 As can be seen, the tenth drive structure 104 can optionally be a drive cylinder, which is fixedly mounted on the seventh mounting base 102. The push rod of the drive cylinder is connected to the blade 103 through an "L"-shaped plate. Those skilled in the art will understand that when the push rod of the drive cylinder extends, the blade 103 extends, and the diaphragm 1 can be cut at this time. When the push rod of the drive cylinder retracts, the blade 103 retracts, and the diaphragm 1 is not cut at this time.

[0122] Furthermore, a protective cover is also provided on the sixth mounting base 101. When the blade 103 is in the retracted state, the blade 103 is located inside the protective cover, thereby preventing the operator from being cut.

[0123] Furthermore, in this embodiment, the blade 103 is set to one. In some embodiments not shown, when it is necessary to lay diaphragms on more rows of electrodes, the number of blades 103 can be increased accordingly.

[0124] After the diaphragm 1 is cut, the next process can be carried out, that is, the diaphragm 1 is laid on the stacking table 2 by the film laying mechanism 30.

[0125] like Figure 5 As shown, in this embodiment, the film stacking device further includes a second frame 70, a fifth mounting base 80, and a ninth drive structure 90. The fifth mounting base 80 is movably mounted on the second frame 70, and the ninth drive structure 90 drives the fifth mounting base 80 to move upstream or downstream relative to the second frame along the direction of membrane 1 flow. Furthermore, the slitting mechanism 100 (when this mechanism is provided), the cutting mechanism 20, the film clamping mechanism 50, and the correction mechanism 60 are all mounted on the fifth mounting base 80.

[0126] Specifically, the ninth drive structure 90 can be a drive cylinder, and the fifth mounting base 80 is a mounting plate. The drive cylinder can drive the mounting plate to move along the flow direction of the electrode sheet, including moving upstream and downstream. The movement of the mounting plate can move the slitting mechanism 100, the cutting mechanism 20, the film clamping mechanism 50, and the web guiding mechanism 60 synchronously.

[0127] The functions of the ninth drive structure 90 and the fifth mounting base 80 mainly include the following three:

[0128] 1. After the clamping mechanism 50 clamps the diaphragm 1, it is conveyed downstream for a certain distance so that the roller 32 can grab the diaphragm 1.

[0129] 2. Move the cutting mechanism 20 to the edge of the stacking table 2 to cut the diaphragm 1;

[0130] 3. Ensure that each mechanism on the fifth mounting base 80 is at a certain distance from the stacking stage 2 to provide a buffer position.

[0131] The three functions mentioned above will be described in detail in the following section on the diaphragm 1 laying steps.

[0132] V. Film Laying Mechanism

[0133] like Figure 1 and Figure 2 ,as well as Figure 10 As shown above, the film-laying mechanism 30 is located downstream of the cutting mechanism 20, i.e., the slitting mechanism 100. The film-laying mechanism 30 includes a first frame 31, a roll 32, a first drive structure 33, and a second drive structure 34. The first drive structure 33 drives the roll 32 to move horizontally relative to the first frame 31, and positions the roll 32 in a first position close to the cutting mechanism 20 and a second position away from the cutting mechanism 20. The roll 32 has a film-gripping state and a released state. The second drive structure 34 drives the roll 32 to rotate in either the first or second direction.

[0134] Specifically, the roller 32 refers to the roller being able to rotate along its own axis, and the second drive structure 34 is able to drive the roller 32 to rotate in a first direction or a second direction. The first direction and the second direction refer to two opposite directions, including the first direction being clockwise and the second direction being counterclockwise, and the first direction being counterclockwise and the second direction being clockwise.

[0135] Those skilled in the art will understand that when the winding roller 32 rotates in the first direction, the diaphragm 1 can be wound onto the winding roller 32, that is, the buffer diaphragm 1. When the winding roller 32 rotates in the second direction, the buffer diaphragm 1 can be released and laid on the stacking table 2.

[0136] like Figure 1 and Figure 10As shown, the first drive structure 33 can drive the roller 32 to translate horizontally, that is, drive the roller 32 to move closer to the cutting mechanism 20 and drive the roller 32 to move away from the cutting mechanism 20. The movement path of the roller 32 has two extreme positions, namely the first position and the second position. When the roller 32 is in the first position, the roller 32 is closer to the cutting mechanism 20, and when the roller 32 is in the second position, the roller 32 is away from the cutting mechanism 20. The stacking table 2 is located between the first position and the second position, that is, the roller 32 can completely pass over the stacking table 2 whether it moves from the first position to the second position or from the second position to the first position.

[0137] Optionally, both the first drive structure 33 and the second drive structure 34 can be linear drive mechanisms such as linear motors and drive cylinders.

[0138] Furthermore, the roller 32 has a film-gripping state and a release state. The film-gripping state refers to fixing the diaphragm 1 onto the roller 32, and the release state refers to releasing the diaphragm 1 from the roller 32. The roller 32 can switch between the film-gripping state and the release state by setting structures such as clamps and suction holes that can be opened and closed.

[0139] The following describes two film laying methods for roller 32:

[0140] Method 1: The roller 32 stops at the first position, is in a clamping state and grabs the diaphragm 1. The roller 32 rotates in the first direction to buffer the diaphragm 1 until the diaphragm to be laid is buffered. Then the roller 32 starts to move back and forth between the first position and the second position. At the same time, the roller 32 rotates in the second direction to release the buffered diaphragm 1 and lay the diaphragm 1 on the stacking table 2. After the roller 32 has released the buffered diaphragm 1, the roller 32 returns to the first position to buffer the diaphragm 1 again.

[0141] Method 2: The roller 32 is in the first position gripping state and grips the diaphragm 1. Then the roller 32 moves from the first position to the second position, while simultaneously rotating in the first direction to buffer the diaphragm 1. That is, the first layer of diaphragm 1 is laid and buffered at the same time. After the roller moves to the second position, that is, after the first layer of diaphragm 1 is laid, the roller 32 rotates in the second direction and moves in the first direction, that is, the buffered diaphragm 1 is released. Depending on the amount of buffered diaphragm 1, the roller 32 can move to the first position to end one round of laying, or it can move back and forth a certain number of times to complete one round of laying. After the roller 32 has released all the buffered diaphragm 1, the roller 32 returns to the first position to grip the diaphragm 1 again.

[0142] For ease of description, the two methods will be referred to as film laying method one and film laying method two below. Those skilled in the art will understand that, regardless of the method, with the feeding mechanism 10 provided only on one side of the stacking table 2, the rollers can achieve the effect of reciprocating diaphragm laying. Therefore, while reducing the space occupied by the stacking equipment, efficient diaphragm laying can still be guaranteed.

[0143] In this embodiment, the first method of film laying is adopted. Its advantage is that the position of the winding buffer diaphragm 1 of the roller 32 is close to the correction mechanism 60. Therefore, the diaphragm 1 can be wound and buffered after the correction mechanism 60 is completed, thereby ensuring the winding accuracy of the diaphragm 1 on the roller 32, and thus ensuring the accuracy of the subsequent laying of the diaphragm 1 on the stacking table 1.

[0144] like Figure 11 As shown, in this embodiment, the roller 32 includes a first mounting base 321, a first clamping plate 322, and a second clamping plate 323. The first mounting base 321 is connected to the driving end of the second driving structure 34. Both the first clamping plate 322 and the second clamping plate 323 are movably mounted on the first mounting base 321, and can move closer to or further away from each other.

[0145] Specifically, the first mounting base 321 is connected to the drive end of the second drive structure 34, which can be a motor. When the motor shaft rotates, it can drive the first mounting base 321 to rotate, thereby driving the first clamping plate 322 and the second clamping plate 323 to rotate. When the motor rotates forward or in reverse, it can drive the winding roller 32 to rotate in the first direction or in the second direction.

[0146] from Figure 10 and Figure 11 As can be seen, both the first clamping plate 322 and the second clamping plate 323 are elongated structures. The first ends of both the first clamping plate 322 and the second clamping plate 323 are movably mounted on the first mounting base 321, and the second ends of both extend horizontally in a direction away from the first mounting base 321. Furthermore, the mutually facing surfaces of the first clamping plate 322 and the second clamping plate 323 are both planar, so that they can clamp the diaphragm. The mutually opposing surfaces of the first clamping plate 322 and the second clamping plate 323 are both arc-shaped, so that they can form a circular roller structure after being closed, thereby facilitating the winding of the buffer diaphragm 1.

[0147] Furthermore, the first clamping plate 322 and the second clamping plate 323 move in the direction of moving closer to each other and moving further away from each other on the first mounting base 321. The movement of the first clamping plate 322 and the second clamping plate 323 on the first mounting base 321 can be achieved through structures such as guide rails and slide rails. Those skilled in the art will understand that when the first clamping plate 322 and the second clamping plate 323 move closer to each other, they can clamp the diaphragm 1, thereby putting the roller 32 in a film-gripping state. When the first clamping plate 322 and the second clamping plate 323 move further away from each other, they can release the diaphragm 1, thereby putting the roller 32 in a released state.

[0148] like Figure 11 As shown, in the technical solution of this embodiment, the roller 32 further includes a first elastic element 324 and a second elastic element 325. Both the first elastic element 324 and the second elastic element 325 are disposed on the first mounting base 321. The first elastic element 324 is adapted to apply an elastic force toward the second clamping plate 323 to the first clamping plate 322, and the second elastic element 325 is adapted to apply an elastic force toward the first clamping plate 322 to the second clamping plate 323.

[0149] That is, the first elastic element 324 and the second elastic element 325 apply elastic forces toward each other to the first clamping plate 322 and the second clamping plate 323, respectively. When the first clamping plate 322 and the second clamping plate 323 are not subjected to other external forces, the first elastic element 324 and the second elastic element 325 keep the first clamping plate 322 and the second clamping plate 323 in a closed state. When the first clamping plate 322 and the second clamping plate 323 are subjected to an external force that moves them away from each other, the first clamping plate 322 and the second clamping plate 323 can be opened, at which time the first elastic element 324 and the second elastic element 325 are compressed. This external force can be achieved by a driving mechanism or by a pushing structure. When the external force disappears, the first elastic element 324 and the second elastic element 325 release their elastic force, causing the first clamping plate 322 and the second clamping plate 323 to return to a closed state.

[0150] Optionally, the first elastic element 324 and the second elastic element 325 can be springs.

[0151] In some embodiments not shown, the first clamping plate 322 and the second clamping plate 323 can be connected to a linear drive mechanism such as a cylinder (or a linear drive mechanism can be connected between the two), and the moving position of the first clamping plate 322 and the second clamping plate 323 can be controlled by linear drive. In this embodiment, the first elastic element 324 and the second elastic element 325 may also be omitted.

[0152] like Figure 1 , Figure 12 and Figure 13As shown, in this embodiment, the film stacking device further includes a clamping mechanism 40, which includes a second mounting base 41, a pusher 42, and a third driving structure 43. The pusher 42 is movably mounted on the second mounting base 41. The third driving structure 43 is mounted on the second mounting base 41 and is used to drive the pusher 42 to extend or retract. Furthermore, when the pusher 42 is in the extended state, it can open the first clamping plate 322 and the second clamping plate 323, thereby releasing the roll 32.

[0153] It should be noted that when the clamping mechanism 40 is engaged, the first clamping plate 322 and the second clamping plate 323 can be opened when the roller 32 moves to the clamping mechanism 40, thereby releasing the roller 32. Correspondingly, when the roller 32 is not engaged to the clamping mechanism 40, the first elastic element 324 and the second elastic element 325 keep the roller 32 in a closed state, i.e., a film gripping state.

[0154] In the embodiment where the first clamping plate 322 and the second clamping plate 323 are connected to the linear drive mechanism, the clamping mechanism 40 may not be provided.

[0155] like Figure 12 As shown, the second mounting base 41 further includes a support column, which can be positioned where the first clamping plate 322 and the second clamping plate 323 are opened when needed. The third driving structure 43 can be a driving cylinder, which is located at the top of the support column. The push-top 42 is a block structure and is connected to the driving end of the driving cylinder.

[0156] Those skilled in the art will understand that when the winding roller 32 moves to the clamping mechanism 40 and it is necessary to open the first clamping plate 322 and the second clamping plate 323, the third drive structure 43 drives the push top 42 to extend, thereby opening the first clamping plate 322 and the second clamping plate 323. When it is necessary to close the first clamping plate 322 and the second clamping plate 323, the third drive structure 43 drives the push top 42 to retract. At this time, the first elastic element 324 and the second elastic element 325 release their elastic force, so that the first clamping plate 322 and the second clamping plate 323 are in the closed state again.

[0157] like Figure 12 and Figure 13 As shown, in this embodiment, the roller 32 further includes a first sliding plate 326 and a second sliding plate 327, both of which are movably mounted on the first mounting base 321. A first clamping plate 322 is mounted on the first sliding plate 326, a first elastic member 324 is connected between the first mounting base 321 and the first sliding plate 326, a second clamping plate 323 is mounted on the second sliding plate 327, and a second elastic member 325 is connected between the first mounting base 321 and the second sliding plate 327.

[0158] Furthermore, the first slide plate 326 is provided with a first protrusion 3261, and the second slide plate 327 is provided with a second protrusion 3271. The first protrusion 3261 and the second protrusion 3271 are arranged opposite to each other. The end of the push top 42 includes a tapered portion 421. When the push top 42 is in the extended state, it can drive the first protrusion 3261 and the second protrusion 3271 to move away from each other.

[0159] Specifically, the first slide plate 326 and the second slide plate 327 move in the directions in which the first clamping plate 322 and the second clamping plate 323 move closer to each other and further away from each other. The movement of the first slide plate 326 and the second slide plate 327 can be achieved through structures such as guide rails and slide rails. The first clamping plate 322 is fixedly mounted on the first slide plate 326, and the second clamping plate 323 is fixedly mounted on the second slide plate 327. Therefore, when the first slide plate 326 and the second slide plate 327 move, they can drive the first clamping plate 322 and the second clamping plate 323 to move relative to each other.

[0160] from Figure 11 and Figure 12 As can be seen, the first elastic element 324 is disposed on the side of the first slide plate 326 opposite to the second slide plate 327, that is, the first elastic element 324 applies an elastic force to the first slide plate 326 in the direction toward the second slide plate 327. The second elastic element 325 is disposed on the side of the second slide plate 327 opposite to the first slide plate 326, that is, the second elastic element 325 applies an elastic force to the second slide plate 327 in the direction toward the first slide plate 326.

[0161] from Figure 13 As can be seen, the first slide plate 326 has a first protrusion 3261, and the second slide plate 327 has a second protrusion 3271. The first protrusion 3261 and the second protrusion 3271 are arranged opposite each other, and the distance between them is less than the width of the push top 42. When the push top 42 extends, its conical part 421 first extends into the space between the first protrusion 3261 and the second protrusion 3271. As the push top 42 continues to extend forward, the widest position of the push top 42 pushes the first protrusion 3261 and the second protrusion 3271 away from each other, thereby driving the first slide plate 326 and the second slide plate 327 to move away from each other. Therefore, the first clamping plate 322 and the second clamping plate 323 are opened, that is, the winding roller 32 is in the loose state. When the push top 42 retracts, the elastic force of the first elastic element 324 and the second elastic element 325 causes the first slide plate 326 and the second slide plate 327 to move closer to each other until the first clamping plate 322 and the second clamping plate 323 are closed, that is, the winding roller 32 is in the film gripping state.

[0162] Optionally, both the first protrusion 3261 and the second protrusion 3271 are rollers. When the push top 42 extends, the rollers, the inclined surfaces of the conical portion 421, and the two sides of the push top 42 all have low friction, ensuring that the push top 42 can smoothly push open the first slide plate 326 and the second slide plate 327.

[0163] Furthermore, the advantage of the above structure is that the push top 42 does not need to be inserted into the gap between the first clamping plate 322 and the second clamping plate 323 to open the clamp. Instead, it indirectly opens the first clamping plate 322 and the second clamping plate 323 by spreading the first sliding plate 326 and the second sliding plate 327. Therefore, there is no need to provide gaps or clearance grooves on the first clamping plate 322 and the second clamping plate 323, ensuring that the contact surface between the first clamping plate 322 and the second clamping plate 323 is a complete plane, thereby ensuring the degree of clamping of the diaphragm 1.

[0164] Regarding the location of the clamping mechanism 40, as mentioned above, the clamping mechanism 40 can be set at the position where the roller 32 needs to be in the open position, which will be described in detail below.

[0165] First, such as Figure 1 and Figure 2 As shown, since the roller 32 needs to grip the diaphragm 1 at the first position, the first clamping plate 322 and the second clamping plate 323 must be in the open state before the diaphragm 1 can be inserted into the position between the first clamping plate 322 and the second clamping plate 323. Therefore, an opening clamping mechanism 40 needs to be set at the first position. In addition, when the buffer diaphragm 1 on the roller 32 is laid out at the first position (for buffer diaphragms 1 with an odd multiple of the stacking platform 2 length in film laying method one, and buffer diaphragms 1 with an even multiple of the stacking platform 2 length in film laying method two), the roller 32 needs to be in the loosened state at the first position after laying, so as to loosen the tail of the diaphragm.

[0166] Secondly, when the buffer diaphragm 1 on the roll 32 is laid out at the second position (for laying method one, the buffer diaphragm 1 is a multiple of the stacking platform 2 length; for laying method two, the buffer diaphragm 1 is a multiple of the stacking platform 2 length), an opening clamping mechanism 40 needs to be set at the second position. This opening clamping mechanism 40 keeps the roll 32 in a loose state at the second position after laying, thereby releasing the tail of the diaphragm. In this embodiment, two opening clamping mechanisms 40 are provided, one at the first position and one at the second position.

[0167] Of course, those skilled in the art can add an opening mechanism 40 at the position where the roller 32 needs to be in a loose state, according to actual needs.

[0168] Furthermore, in this embodiment, there are two film-laying mechanisms 30, located on opposite sides of the feeding mechanism 10 along the direction perpendicular to the flow of the diaphragm 1. The rollers 32 of the two film-laying mechanisms 30 are arranged opposite each other along the flow direction of the diaphragm 1. The film-laying mechanism 30 also includes a fourth driving structure 35, which drives the rollers 32 to move vertically relative to the first frame 31.

[0169] Specifically, by setting up two film-laying mechanisms 30, the diaphragm 1 laying efficiency of the film-laying apparatus can be further improved. The two film-laying mechanisms 30 have basically the same structure and are arranged in a mirror-symmetrical manner along the stacking table 2. The winding rollers 32 of the two film-laying mechanisms 30 extend in opposite directions and are arranged symmetrically.

[0170] In the two rolls 32 of the two film laying mechanisms 30, at the same time, one roll lays the diaphragm 1 and the other rolls buffer the diaphragm 1. The two rolls 32 alternately lay the diaphragm 1 and buffer the diaphragm 1, so that there is a roll 32 laying the diaphragm 1 at every moment, which greatly improves the laying efficiency of the diaphragm 1.

[0171] Furthermore, in the case of two film-laying mechanisms 30, a fourth drive structure 35 is also required. The fourth drive structure 35 can drive the roll 32 to move vertically. The function of the fourth drive structure 35 is to misalign the two rolls 32 in the vertical direction, so that no positional conflict will occur during their movement between the first position and the second position.

[0172] Optionally, the fourth drive structure 35 can be a linear drive mechanism such as a linear motor or a drive cylinder.

[0173] When two membrane laying mechanisms 30 are set up, how they work together to lay the diaphragm 1 is described in detail in the following membrane laying steps.

[0174] Furthermore, in some embodiments not shown, it is also feasible to provide only one film-laying mechanism 30. Alternatively, in this embodiment where two film-laying mechanisms 30 are provided, it is also feasible to operate only one of the film-laying mechanisms 30 (i.e., the other film-laying mechanism 30 is not started), which is equivalent to providing only one film-laying mechanism 30.

[0175] The above describes the specific structure of the membrane laying device in this embodiment. The following details how to use the membrane laying device in this embodiment to lay the diaphragm.

[0176] VI. Film Laying Steps

[0177] As described above, the film-laying device in this embodiment can use one roller 32 for film laying (set one film-laying mechanism 30, or set two film-laying mechanisms 30 but only start one), or it can use two rollers 32 to lay film together. These will be described separately below.

[0178] 1. Single roll 32 film laying (taking film laying method one as an example)

[0179] Step 1, such as Figure 16 As shown, the roller 32 moves to the first position, and the clamping mechanism 50 and the cutting mechanism 20 move upstream synchronously a distance via the ninth drive structure 90 to make way for the roller 32; the first clamping plate 322 and the second clamping plate 323 are opened by the clamping mechanism 40, the clamping mechanism 50 clamps the diaphragm 1, and moves downward a distance via the ninth drive structure 90 to feed the end of the diaphragm 1 between the first clamping plate 322 and the second clamping plate 323, and then the first clamping plate 322 and the second clamping plate 323 are closed to clamp the diaphragm 1; the clamping mechanism 50 releases the diaphragm, and then the roller 32 rotates in the first direction to buffer the diaphragm 1 on the roller 32 until the preset length of the diaphragm 1 is buffered;

[0180] Step Two, as follows Figure 17 As shown, after the roller 32 has buffered the diaphragm 1, it moves toward the second position and rotates in the second direction while moving, that is, it releases the buffered diaphragm 1 and lays the diaphragm on the stacking table; until the first layer of diaphragm is laid.

[0181] Step 3, as follows Figure 18 As shown, after the first layer of diaphragm is laid by the roller 32, the film clamping mechanism 50 and the cutting mechanism 20 move downstream synchronously a certain distance through the ninth drive structure 90 until the cutting mechanism 20 is at the edge of the stacking table 2; then the film clamping mechanism 50 clamps the diaphragm 1 and the cutting mechanism 20 cuts the diaphragm.

[0182] Step 4, as follows Figure 19 As shown, the clamping mechanism 50 and the cutting mechanism 20 move upstream synchronously a certain distance via the ninth drive structure 90. Simultaneously, the winding roller 32 moves from the second position to the first position, rotating in the second direction while moving, thus releasing the buffered diaphragm 1 and laying the diaphragm on the stacking table. The number of reciprocating movements of the winding roller 32 can be selected based on the length of the buffered diaphragm 1.

[0183] Step 5, as follows Figure 20 As shown, after the roller 32 lays the diaphragm, the first clamping plate 322 and the second clamping plate 323 are opened by the clamping mechanism 40, and the roller 32 releases the tail of the diaphragm; then the roller 32 moves back to the front of the clamping mechanism 50 and the cutting mechanism 20, ready to re-buffer the diaphragm (refer to the content of step one).

[0184] By repeating steps one through five above, high-speed reciprocating diaphragm 1 can be laid.

[0185] It should be noted that if the above-mentioned second method of film laying is adopted, the film laying steps are basically the same as the above steps. The difference is that at the end of step one, the roller 32 rotates in the first direction and moves in the second position at the same time. In step two, the roller 32 buffers the diaphragm 1 and completes the laying of the first layer of diaphragm 1.

[0186] 2. Double-roller 32 film laying

[0187] First, it should be noted that, in order to distinguish between the two rollers 32, the roller 32 in one of the film laying mechanisms 30 is referred to as the first roller 3201, and the roller 32 in the other film laying mechanism 30 is referred to as the second roller 3202.

[0188] Step 1, such as Figure 21 As shown, the first roller 3201 moves to the first position, and the clamping mechanism 50 and the cutting mechanism 20 move upstream a certain distance synchronously through the ninth drive structure 90 to make way for the first roller 3201; the first clamping plate 322 and the second clamping plate 323 of the first roller 3201 are opened by the clamping mechanism 40, the clamping mechanism 50 clamps the diaphragm 1, and moves downstream a certain distance through the ninth drive structure 90 to feed the end of the diaphragm 1 between the first clamping plate 322 and the second clamping plate 323, and then the first clamping plate 322 and the second clamping plate 323 are closed, so that the first roller 3201 clamps the diaphragm 1; the clamping mechanism 50 releases the diaphragm, and then the first roller 3201 rotates in the first direction to buffer the diaphragm 1 on the first roller 3201 until the preset length of the diaphragm 1 is buffered; at this time, the second roller 3202 waits in the upper position to buffer the diaphragm 1, and does not affect the horizontal movement of the first roller 3201;

[0189] Step 2, as follows Figure 22 As shown, after the first roller 3201 buffers the diaphragm 1, it moves toward the second position and rotates in the second direction while moving, that is, it releases the buffered diaphragm 1 and lays the diaphragm on the stacking table; until the first layer of diaphragm is laid.

[0190] Step 3, as follows Figure 23 As shown, after the first roll 3201 lays the first layer of diaphragm, the film clamping mechanism 50 and the cutting mechanism 20 move downstream synchronously a certain distance through the ninth drive structure 90 until the cutting mechanism 20 is at the edge of the stacking table 2; then the film clamping mechanism 50 clamps the diaphragm 1 and the cutting mechanism 20 cuts the diaphragm.

[0191] Step 4, as follows Figure 24As shown, the film clamping mechanism 50 and the cutting mechanism 20 move upstream synchronously a certain distance via the ninth drive structure 90. At the same time, the first roller 3201 moves from the second position to the first position and rotates in the second direction while moving, that is, releasing the buffered diaphragm 1 and laying the diaphragm on the stacking table. The number of times the first roller 3201 moves back and forth can be selected according to the length of the buffered diaphragm 1. At the same time, the second roller 3202 moves to the front of the film clamping mechanism 50 and the cutting mechanism 20 and begins to buffer the diaphragm (the buffering method is the same as the buffering method of the first roller 3201 in step one, and will not be described again).

[0192] Step 5, as follows Figure 25 As shown, after the first roller 3201 lays the diaphragm 1, the first clamping plate 322 and the second clamping plate 323 are opened by the clamping mechanism 40, and the first roller 3201 releases the tail of the diaphragm; and the first roller 3201 moves to the top to wait for the next buffer diaphragm 1; at this time, the second roller 3202 has finished buffering the diaphragm 1 and is ready to lay the diaphragm 1.

[0193] Step Six, as Figure 26 As shown, after the second roller 3202 has buffered the diaphragm 1, it moves toward the second position and rotates in the second direction while moving, that is, it releases the buffered diaphragm 1 and lays the diaphragm on the stacking table; until the first layer of diaphragm is laid.

[0194] Step 7, as follows Figure 27 As shown, after the second roll 3202 lays the first layer of diaphragm 1, the film clamping mechanism 50 and the cutting mechanism 20 move downstream synchronously a certain distance through the ninth drive structure 90 until the cutting mechanism 20 is at the edge of the stacking table 2; then the film clamping mechanism 50 clamps the diaphragm 1 and the cutting mechanism 20 cuts the diaphragm.

[0195] Step 8, as Figure 28 As shown, the film clamping mechanism 50 and the cutting mechanism 20 move upstream synchronously a certain distance via the ninth drive structure 90. At the same time, the second roller 3202 moves from the second position to the first position and rotates in the second direction while moving, that is, releasing the buffered diaphragm 1 and laying the diaphragm on the stacking table. The number of times the second roller 3202 moves back and forth can be selected according to the length of the buffered diaphragm 1. At the same time, the first roller 3201 moves to the front of the film clamping mechanism 50 and the cutting mechanism 20 and begins to buffer the diaphragm (the buffering method is described in step one, which will not be repeated).

[0196] By repeating steps one through eight above, the high-speed reciprocating laying of the diaphragm 1 by the dual rollers 32 can be achieved, ensuring that the rollers 32 are always laying the diaphragm 1, thus greatly improving the laying efficiency.

[0197] It should be noted that if the first roll 3201 and the second roll 3202 adopt the above-mentioned film laying method two, the film laying steps are basically the same as the above steps. The difference is that: at the end of step one, the first roll 3201 rotates in the first direction and moves towards the second position at the same time; in step two, the first roll 3201 buffers the diaphragm 1 while laying the first layer of diaphragm 1; at the end of step six, the second roll 3202 rotates in the first direction and moves towards the second position at the same time; in step seven, the second roll 3202 buffers the diaphragm 1 while laying the first layer of diaphragm 1.

[0198] This application also provides a stacking apparatus, which, according to an embodiment of the stacking apparatus of this application, includes a stacking table 2, the above-mentioned stacking device, a film-making mechanism, and a transport mechanism.

[0199] from Figure 15 As can be seen, the top of the stacking stage 2 is provided with a stacking position, and the side of the stacking position is provided with a positive electrode pressing knife and a negative electrode pressing knife.

[0200] Furthermore, the feeding mechanism 10, the alignment mechanism 60, the clamping mechanism 50, the cutting mechanism 20, and the slitting mechanism 100 of the laminating device are located at the end of the laminating table 2. The two film-laying mechanisms 30 are located on both sides of the laminating table 2.

[0201] In this embodiment, a feeding mechanism 10 is provided only on one side of the stacking table 2.

[0202] The wafer-making mechanism is used to process positive and negative electrode sheets, and the conveying mechanism can reciprocate to transport the positive and negative electrode sheets onto the stacking table.

[0203] Furthermore, the working process of the stacking device is as follows: the conveying mechanism transports a set of positive electrode sheets to the stacking table; the film-laying mechanism 30 lays a layer of separator 1; the conveying mechanism transports a set of negative electrode sheets to the stacking table; the film-laying mechanism 30 lays a layer of separator 1, and so on. After laying one layer of positive electrode sheet and one layer of separator, the positive electrode sheet pressing knife presses down on the material below; after laying one layer of negative electrode sheet and one layer of separator, the negative electrode sheet pressing knife presses down on the material below. The positive electrode sheet pressing knife and the negative electrode sheet pressing knife work alternately.

[0204] In addition, the stacking position of the stacking table 2 can be moved vertically by the drive mechanism. After each layer of material is placed, the stacking position will drop a certain distance, which will also drive all the laid materials to drop a certain distance, thereby ensuring that the topmost material is always kept in a horizontal plane.

[0205] This application also provides a battery production line, which includes the above-described stacking device.

[0206] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A film stacking device, characterized in that, include: A feeding mechanism (10) is used to provide a diaphragm (1); A cutting mechanism (20) is located downstream of the feeding mechanism (10) and is used to cut the diaphragm (1). A film-laying mechanism (30) is located downstream of the cutting mechanism (20) and includes a first frame (31), a roller (32), a first drive structure (33), and a second drive structure (34). The roller (32) includes a first mounting base (321), a first clamping plate (322), a second clamping plate (323), a first sliding plate (326), and a second sliding plate (327). The first mounting base (321) is connected to the drive end of the second drive structure (34). The first sliding plate (326) and the second sliding plate (327) are movably mounted on the first mounting base (321). The first clamping plate (322) is mounted on the first sliding plate (326). The second clamping plate (323) is disposed on the second sliding plate (327). The first clamping plate (322) and the second clamping plate (323) can move closer to or further away from each other. The first sliding plate (326) is provided with a first protrusion (3261), and the second sliding plate (327) is provided with a second protrusion (3271). The first protrusion (3261) and the second protrusion (3271) are disposed opposite to each other. The first driving structure (33) is used to drive the roller (32) to move horizontally relative to the first frame (31), and to make the roller (32) have a first position close to the cutting mechanism (20) and a second position away from the cutting mechanism (20). The roller (32) has a film-gripping state and a released state. The second driving structure (34) drives the roller (32) to rotate in the first direction or the second direction. The roller (32) can move from the first position to the second position or from the second position to the first position to lay the diaphragm (1) on the stacking table (2); The clamping mechanism (40) includes a second mounting base (41), a push top (42), and a third drive structure (43). The push top (42) is movably mounted on the second mounting base (41), and the third drive structure (43) is mounted on the second mounting base (41) for driving the push top (42) to extend or retract. When the push top (42) is in the extended state, it can drive the first protrusion (3261) and the second protrusion (3271) to move away from each other to open the first clamping plate (322) and the second clamping plate (323) so that the roller (32) is in the released state.

2. The film stacking device according to claim 1, characterized in that, The roller (32) further includes a first elastic element (324) and a second elastic element (325), both of which are disposed on the first mounting base (321). The first elastic element (324) is adapted to apply an elastic force toward the second clamping plate (323) to the first clamping plate (322), and the second elastic element (325) is adapted to apply an elastic force toward the first clamping plate (322) to the second clamping plate (323).

3. The film stacking device according to claim 2, characterized in that, The first elastic element (324) is connected between the first mounting base (321) and the first sliding plate (326), and the second elastic element (325) is connected between the first mounting base (321) and the second sliding plate (327). The end of the pusher (42) includes a tapered portion (421).

4. The film stacking device according to claim 1, characterized in that, The clamping mechanism (40) is located at the first position; or, there are two clamping mechanisms (40), which are located at the first position and the second position respectively.

5. The film stacking apparatus according to any one of claims 1 to 4, characterized in that, There are two film-laying mechanisms (30). In the direction of flow perpendicular to the diaphragm (1), the two film-laying mechanisms (30) are located on both sides of the feeding mechanism (10). In the direction of flow of the diaphragm (1), the rollers (32) of the two film-laying mechanisms (30) are arranged opposite to each other. The film-laying mechanism (30) also includes a fourth driving structure (35), which is used to drive the rollers (32) to move vertically relative to the first frame (31).

6. The film stacking apparatus according to any one of claims 1 to 4, characterized in that, The film stacking device further includes a film clamping mechanism (50), which is located upstream of the cutting mechanism (20) and is capable of clamping or releasing the diaphragm (1).

7. The film stacking device according to claim 6, characterized in that, The film clamping mechanism (50) includes a third mounting base (51), a third clamping plate (52), a fourth clamping plate (53), and a fifth driving structure (54). At least one of the third clamping plate (52) and the fourth clamping plate (53) is movably disposed on the third mounting base (51). The fifth driving structure (54) is used to drive the third clamping plate (52) and the fourth clamping plate (53) to move closer to each other or further away from each other.

8. The film stacking apparatus according to claim 7, characterized in that, The cutting mechanism (20) includes a fourth mounting base (21), a cutting strip (22), and a sixth driving structure (23). The fourth mounting base (21) is movably mounted on the third mounting base (51). The cutting strip (22) is mounted on the fourth mounting base (21) and located downstream of the third clamping plate (52) and the fourth clamping plate (53). The sixth driving structure (23) drives the fourth mounting base (21) to move vertically.

9. The film stacking device according to claim 8, characterized in that, At least one end of the cutting strip (22) is provided with a seventh drive structure (24), which is disposed on the fourth mounting base (21) and is used to apply an outward pulling force to the end of the cutting strip (22).

10. The film stacking apparatus according to claim 6, characterized in that, The film stacking device further includes a correction mechanism (60), which is disposed between the feeding mechanism (10) and the film clamping mechanism (50).

11. The film stacking apparatus according to claim 10, characterized in that, Along the flow direction of the diaphragm (1), the correction mechanism (60) includes a guide roller (61), a detection structure (62), and a correction roller (63). The correction mechanism (60) also includes an eighth drive structure (64) for driving the cutting mechanism (20), the clamping mechanism (50), and the correction roller (63) to move synchronously along the flow direction perpendicular to the diaphragm (1).

12. The film stacking apparatus according to claim 10, characterized in that, The film stacking device further includes a second frame (70), a fifth mounting base (80), and a ninth drive structure (90). The fifth mounting base (80) is movably mounted on the second frame (70). The ninth drive structure (90) is used to drive the fifth mounting base (80) to move upstream or downstream relative to the second frame along the direction of the diaphragm (1) flow. The cutting mechanism (20), the film clamping mechanism (50), and the correction mechanism (60) are all mounted on the fifth mounting base (80).

13. The film stacking apparatus according to any one of claims 1 to 4, characterized in that, The film stacking device further includes a slitting mechanism (100), which is located downstream of the cutting mechanism (20) and is used to slit the diaphragm (1) into multiple strips.

14. The film stacking device according to claim 13, characterized in that, The slitting mechanism (100) includes a sixth mounting base (101), a seventh mounting base (102), a blade (103), a tenth drive structure (104), and an adjustment structure (105). The seventh mounting base (102) is movably mounted on the sixth mounting base (101). The tenth drive structure (104) is mounted on the seventh mounting base (102). The blade (103) is mounted on the drive end of the tenth drive structure (104). The tenth drive structure (104) can drive the blade (103) to extend or retract. The adjustment structure (105) is used to adjust the relative position of the seventh mounting base (102) relative to the sixth mounting base (101).

15. The film stacking apparatus according to any one of claims 1 to 4, characterized in that, Along the flow direction of the diaphragm (1), the feeding mechanism (10) includes an unwinding roller (11), a pressure roller (12), an electrostatic elimination structure (13), a tensioning structure (14), and a buffer structure (15).

16. The film stacking apparatus according to claim 15, characterized in that, The feeding mechanism (10) further includes an eighth mounting base (16) and an eleventh drive structure (17). The unwinding roller (11) is movably mounted on the eighth mounting base (16), and the eleventh drive structure (17) drives the unwinding roller (11) to move along its axial direction.

17. A stacking device, characterized in that, include: Stacking table (2); A film stacking device, wherein the film stacking device is any one of claims 1 to 16, and the film laying mechanism (30) is disposed on the side of the stacking table (2); A wafer fabrication mechanism used to provide positive and negative electrode plates; A transport mechanism is used to transport the positive electrode and the negative electrode to the stacking stage (2).

18. A battery production line, characterized in that, Includes the stacking device as described in claim 17.

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