Lamination mechanism and production line

Abstract

The invention discloses a lamination mechanism and a production line. The lamination mechanism is used for arranging lamination roll materials and pole pieces in a laminated manner so as to process and form a battery cell. The laminated roll material comprises a laminated section and a cache section. The lamination mechanism comprises a lamination table and a film drawing assembly. The lamination table is provided with a supporting face used for supporting the lamination piece, and the lamination table is configured to move in a reciprocating mode in the first direction parallel to the supporting face. And the film drawing assembly is used for guiding the buffer section to the lamination table, and the film drawing assembly is configured to be capable of reciprocating in the first direction. Wherein the film drawing assembly and the lamination table are opposite in movement direction. According to the lamination mechanism and the production line, the relative movement speed of the lamination table and the film drawing assembly can be effectively increased, the lamination efficiency is improved, the lamination quality is guaranteed, the model selection difficulty of a motor is reduced, and the stability of lamination operation is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and particularly relates to a laminating mechanism and a production line. Background Art

[0002] The laminator processes laminated battery cells by using a Z-shaped laminating method. Specifically, the laminator stacks prefabricated positive and negative electrode sheets alternately with a separator in a Z shape to form a battery cell.

[0003] In related technologies, during the laminating process, the laminator uses a stacking table or a film pulling assembly to reciprocate to achieve the Z-shaped swing of the separator. To improve the laminating efficiency, when the stacking table movement method is adopted, that is, the movement speed of the stacking table needs to be increased, which requires higher requirements for the motor used to drive the movement of the stacking table, resulting in difficult motor selection and increased costs. Additionally, since the laminated battery cell is located on the stacking table, when the movement speed and acceleration of the stacking table increase, the electrode sheets will slip between the electrode sheets during the action of the stacking table, resulting in an out-of-tolerance lamination alignment. When the film pulling assembly movement method is adopted, to maintain the rigidity of the film pulling assembly itself, the self-weight of the film pulling assembly needs to be increased, which will also lead to difficult motor selection and increased driving costs. Summary of the Invention

[0004] The main object of the present invention is to propose a laminating mechanism and a production line, aiming to solve the technical problems of difficult motor selection and electrode sheet slippage during lamination.

[0005] To achieve the above object, a first aspect embodiment of the present invention proposes a laminating mechanism for laminating a laminated coil material and electrode sheets to form a battery cell by processing. The laminated coil material includes a laminating section and a buffer section. The laminating mechanism includes:

[0006] A stacking table including a support surface for supporting the laminating section, and the stacking table is configured to be able to reciprocate in a first direction parallel to the support surface;

[0007] A film pulling assembly for guiding the buffer section to the stacking table, and the film pulling assembly is configured to be able to reciprocate in the first direction;

[0008] Wherein, the movement direction of the film pulling assembly is opposite to that of the stacking table.

[0009] In some embodiments, the laminating mechanism includes a plurality of buffer components, and each buffer component includes a first fixed roller and a first moving roller. At least a part of the buffer section is wound around the first fixed roller and the first moving roller; when the stacking table and the film pulling assembly approach each other in the first direction, the first moving roller approaches the first fixed roller in the first direction.

[0010] In some embodiments, the film pulling assembly includes a first pair of rollers and a second pair of rollers arranged opposite to each other in a second direction, and the stacked segment is adapted to pass through a first gap between the first pair of rollers and a second gap between the second pair of rollers, and the second direction is perpendicular to the first direction.

[0011] In some embodiments, the stacking mechanism further includes a first driving portion, the first driving portion is connected to the film pulling assembly, and the first driving portion is used to drive the film pulling assembly to reciprocate in the first direction so as to lay the stacked segment on the support surface.

[0012] In some embodiments, the stacking mechanism further includes a second driving portion, the second driving portion is connected to the stacking table, and the second driving portion is adapted to drive the stacking table to reciprocate in the first direction so as to lay the stacked segment on the support surface.

[0013] In some embodiments, the stacking mechanism further includes a sliding assembly, the sliding assembly includes a slider and a slide rail connected to each other, and the slider is connected to the stacking table to enable the stacking table to slide on the slide rail.

[0014] In some embodiments, a first limiting member and a second limiting member are provided on the slide rail, and the first limiting member and the second limiting member are arranged opposite to each other and spaced apart in the first direction;

[0015] The sliding assembly is configured to have a first extreme position and a second extreme position. At the first extreme position, the slider abuts against the first limiting member, and the film pulling assembly is located on one side of the stacking table in the first direction; at the second extreme position, the slider abuts against the second limiting member, and the film pulling assembly is located on the other side of the stacking table in the first direction.

[0016] In some embodiments, the stacking mechanism further includes a third driving portion, the third driving portion is connected to each of the buffer assemblies, each of the first driving rollers has an axis extending in a third direction, and the third driving portion is adapted to drive each of the first driving rollers to rotate around each axis to guide the buffer segment to the stacking table, and the third direction is perpendicular to the first direction.

[0017] In some embodiments, the stacking mechanism includes a fixing portion, the fixing portion includes a second fixed roller and a third fixed roller arranged opposite to each other, and there is a third gap between the second fixed roller and the third fixed roller, and the buffer segment passes through the third gap.

[0018] An embodiment of the second aspect of the present invention provides a production line, including the stacking mechanism as described in the above embodiments.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] In the technical solution of the present invention, the laminating mechanism includes a laminating table and a film pulling assembly. Compared with the prior art solution that only uses the laminating table or the film pulling assembly to reciprocate in the first direction for laminating operation. The laminating table in this solution can reciprocate in the first direction parallel to the support surface, the film pulling assembly can reciprocate in the first direction, and the moving direction of the film pulling assembly is opposite to that of the laminating table, that is, this solution can effectively increase the relative speed between the laminating table and the film pulling assembly. Therefore, when the driving power of the motor is certain, the laminating efficiency of the laminating mechanism in this solution is higher. In the case where the preset laminating speed is certain, the laminating mechanism in this solution has lower requirements for the power of the driving motor, that is, it can effectively reduce the difficulty of selecting the motor and save costs. Further, this solution has lower requirements for the moving speed and acceleration of the laminating table, so it can reduce the situation of slippage of the pole piece in the laminating table and prevent the laminating alignment from exceeding the tolerance. Additionally, this solution can also reduce the rigidity requirement for the film pulling assembly and reduce the driving cost of the film pulling assembly. And, because the laminating table and the film pulling assembly move together, this solution can also change the movement path of the laminating coil, reduce the convex change of its speed and acceleration, ensure the stability of the tension control of the laminating coil, and thus improve the stability of the laminating operation. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0022] Figure 1 Schematic diagram of the laminating mechanism in an embodiment of the present invention; wherein, the laminating mechanism is at time T0, and the film pulling assembly is located at the first extreme position;

[0023] Figure 2 Schematic diagram of the laminating mechanism in an embodiment of the present invention; wherein, the laminating mechanism is at time T1, and along the second direction, one end of the film pulling assembly coincides with the laminating table in the first direction;

[0024] Figure 3 Schematic diagram of the laminating mechanism in an embodiment of the present invention; wherein, the laminating mechanism is at time T2, and along the second direction, the film pulling assembly coincides with the fixing part;

[0025] Figure 4 Schematic diagram of the laminating mechanism in an embodiment of the present invention; wherein, the laminating mechanism is at time T3, and the film pulling assembly is located at the second extreme position;

[0026] Figure 5Schematic structural diagram of a lamination mechanism in an embodiment of the present invention;

[0027] Figure 6 Schematic structural diagram of the lamination mechanism in an embodiment of the present invention in another direction;

[0028] Figure 7 Schematic diagram of a lamination mechanism in the prior art; wherein, the lamination mechanism is at time T0, and the film pulling assembly is located at the first limit position;

[0029] Figure 8 Schematic diagram of a lamination mechanism in the prior art; wherein, the lamination mechanism is at time T1, and along the second direction, the film pulling assembly coincides with one end of the lamination table along the first direction;

[0030] Figure 9 Schematic diagram of a lamination mechanism in the prior art; wherein, the lamination mechanism is at time T2, and along the second direction, the film pulling assembly coincides with the fixing part;

[0031] Figure 10 Schematic diagram of a lamination mechanism in the prior art; wherein, the lamination mechanism is at time T3, and the film pulling assembly is located at the second limit position.

[0032] Explanation of reference numerals in the drawings:

[0033] Lamination mechanism 10;

[0034] Lamination table 100; Support surface 110;

[0035] Film pulling assembly 200; First pair of rollers 210; First gap 211; Second pair of rollers 220; Second gap 221;

[0036] Buffer assembly 300; First fixed roller 310; First moving roller 320; Axis 321;

[0037] First driving part 400;

[0038] Second driving part 500;

[0039] Sliding assembly 600; Slide block 610; Slide rail 620; First limiting member 621; Second limiting member 622;

[0040] Third driving part 700;

[0041] Fixing part 800; Second fixed roller 810; Third fixed roller 820; Third gap 830;

[0042] Lamination coil 20; Lamination section 201; Buffer section 202;

[0043] First direction X; Second direction Y; Third direction Z.

[0044] The implementation, functional features, and advantages of the present invention will be further described in conjunction with embodiments with reference to the accompanying drawings. Detailed Embodiments

[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0046] In the related art, during the lamination process, the laminator uses the reciprocating movement of the lamination table or the film pulling assembly to achieve the Z-shaped swing of the diaphragm. To improve the lamination efficiency, when the lamination table movement method is adopted, that is, the movement speed of the lamination table needs to be increased, so the requirements for the motor used to drive the lamination table movement are relatively high, which will lead to difficulties in motor selection and increase costs. Additionally, since the laminated battery cells are located on the lamination table, when the movement speed and acceleration of the lamination table increase, the electrodes of the battery cells will slip during the lamination table operation, resulting in an out-of-tolerance lamination alignment. When the film pulling assembly movement method is adopted, to maintain the rigidity of the film pulling assembly itself, the self-weight of the film pulling assembly needs to be increased, which will also lead to difficulties in motor selection and increase the driving cost.

[0047] In view of this, the first aspect embodiment of the present invention proposes a lamination mechanism 10. The lamination mechanism 10 is used to laminate the lamination roll material 20 and the electrode sheets to process and form a battery cell. The lamination roll material 20 includes a lamination segment 201 and a buffer segment 202. It should be noted that the lamination segment 201 is the roll material segment for the lamination operation on the lamination table 100, and the buffer segment 202 is the roll material segment cached on the buffer assembly 300. During the unrolling process of the buffer assembly 300, the buffer segment 202 can be guided to the lamination table 100 to become the lamination segment 201.

[0048] The following will refer to Figures 1 to 6 to introduce the lamination mechanism 10 of the embodiments of the present application. Specifically, the lamination mechanism 10 includes a lamination table 100 and a film pulling assembly 200.

[0049] The lamination table 100 is used for the lamination operation. The lamination table 100 includes a support surface 110 for supporting the lamination segment 201, and the specific size of the support surface 110 can be determined according to the actual situation. To facilitate the description and understanding of the specific movement process of the lamination table 100, a first direction X is defined. The lamination table 100 is configured to be able to reciprocate in a first direction X parallel to the support surface 110 to achieve the lamination operation. Taking Figure 5 the orientation therein as a reference, the first direction X can be the left-right direction, that is, the lamination table 100 can reciprocate in the left-right direction.

[0050] The film pulling assembly 200 is used to guide the buffer section 202 of the stacked film coil 20 to the stacking table 100. The film pulling assembly 200 is configured to be reciprocally movable along the first direction X so as to Figure 5 take the orientation in

[0051] as a reference, that is, the film pulling assembly 200 can reciprocally move in the left-right direction. Figure 5 It should be noted that the moving direction of the film pulling assembly 200 is opposite to that of the stacking table 100. Taking the orientation in

[0052] as a reference, specifically, in some embodiments, when the film pulling assembly 200 moves in the direction from left to right, the stacking table 100 moves in the direction from right to left. In other embodiments, when the film pulling assembly 200 moves in the direction from right to left, the stacking table 100 moves in the direction from left to right.

[0053] Referring to Figures 7 to 10, the applicant makes the following analysis and description of the motion process of the existing lamination mechanism 10. The lamination mechanism 10 uses a film pulling assembly 200 to reciprocate and is provided with a single buffer assembly 300. This analysis takes a single lamination process as an example. It is set that: the acceleration of the film pulling assembly 200 is a; t is the time for the lamination table 100 to move from the first extreme position to the second extreme position; T is the total cycle of the movement of the film pulling assembly 200; S is the total stroke of the movement of the film pulling assembly 200. It should be noted that in this analysis process, it is set that the unwinding is uniform, and the following factors are not considered: air resistance, deformation of the diaphragm (lamination coil 20), acceleration addition, separation of the diaphragm from the roller, acceleration fluctuation of the diaphragm unwinding, pressing knife action of the lamination table 100, air resistance, slipping between the roller and the diaphragm, etc.

[0054] It should be noted that in the description of this article, with Figure 1 the orientation in it as a reference, L1 is the horizontal distance from the left edge of the lamination table 100 to the film pulling assembly 200 (center of the double rollers) along the first direction X; L2 is the horizontal distance from the fixed part 800 (center of the double rollers) to the film pulling assembly 200 (center of the double rollers) along the first direction X; H1 is the vertical distance from the lamination table 100 to the film pulling assembly 200 (center of the double rollers) along the second direction Y; H2 is the vertical distance from the fixed part 800 (center of the double rollers) to the film pulling assembly 200 (center of the double rollers) along the second direction Y.

[0055] Referring to Figure 7 and Figure 8 , from T0 to T1, during this process, the film pulling assembly 200 moves to the right, and the length of the tape between the buffer assembly 300 and the lamination table 100 becomes shorter. At this time, the first moving roller 320 of the buffer assembly 300 moves to the right. During this process, the length change of the tape caused by the rightward movement of the film pulling assembly 200 is all absorbed or released by the buffer assembly 300. During the process of T0 - T1:

[0056]

[0057] Among them, S 缓 : Buffer assembly position, m; V 放 : Diaphragm unwinding speed, m / s;

[0058] Referring to Figure 8 and Figure 9 , from T1 to T2, during this process, the film pulling assembly 200 continues to move to the right, the length of the tape between the buffer assembly 300 and the lamination table 100 begins to become longer, the tape below the film pulling assembly 200 becomes longer, and the tape above the film pulling assembly 200 becomes shorter. At this time, the buffer assembly 300 moves slowly to the left. During this process, the length change of the tape caused by the rightward movement of the film pulling assembly 200 is all absorbed or released by the buffer. During the process of T1 - T2:

[0059] Among them, S 缓 : Position of the buffer component (the first driving roller), m; V 放 : Diaphragm unwinding speed, m / s; S1: Position where the buffer is located at time T1, m;

[0060] Referring to Figure 3 and Figure 4 , from T2 to T3, the film pulling component 200 continues to move to the right, the length of the strip between the buffer component 300 and the lamination table 100 starts to increase, the strip below the film pulling component 200 becomes longer, the strip above the film pulling component 200 becomes longer, and at this time the buffer component 300 moves quickly to the right. During this process, all the length changes of the strip caused by the rightward movement of the film pulling component 200 are absorbed or released by the buffer component 300. During the process of T2 - T3:

[0061] Among them, S 缓 : Position of the buffer shaft, m; V 放 : Diaphragm unwinding speed, m / s; S2: Position where the buffer is located at time T2, m; S: Total stroke of the film pulling shaft movement, m.

[0062] From the movement process of the existing lamination mechanism above, it can be seen that: the maximum acceleration of the buffer shaft of the buffer component is at the moment of T1 - T2, and at this time the film pulling component is in the commutation stage, and the acceleration of the film pulling component reaches the maximum. At this time, the pressure on the buffer motor and the buffer component is very large. Therefore, the applicant considers setting up a multi - level buffer for the lamination mechanism to solve these problems.

[0063] Referring to Figures 1 to 4 , the applicant makes the following analysis and description of the movement process of the lamination mechanism 10 of an embodiment of the present application. This analysis takes a single lamination process as an example. It is set that: the acceleration of the film pulling component 200 is a, t is the time for the lamination table 100 to move from the first limit position to the second limit position; T is the total cycle of the movement of the film pulling component 200; S is the total stroke of the movement of the film pulling component 200. It should be noted that in this analysis process, it is set that the unwinding of the buffer component 300 is uniform, and the following factors are not considered: air resistance, deformation of the diaphragm (lamination coil 20), acceleration addition, separation of the diaphragm from the roller, acceleration fluctuation of the diaphragm unwinding, pressing knife action of the lamination table 100, air resistance, slipping between the roller and the diaphragm (lamination coil 20), etc.

[0064] Referring to Figure 1 and Figure 2 , from T0 to T1, during this process, the film pulling component 200 moves to the right, the length of the strip between the buffer component 300 and the lamination table 100 becomes shorter, and at this time the buffer component 300 moves to the right. During this process, all the length changes of the strip caused by the rightward movement of the film pulling component 200 are absorbed or released by the buffer component 300. During the process of T0 - T1:

[0065] Among them, S 缓 : Position of the buffer component (first driving roller), m; V 放 : Unwinding speed of the diaphragm (laminated strip), m / s; N: Number of buffer rollers of the buffer component; A: Acceleration of the movement of the lamination table.

[0066] Referring to Figure 2 and Figure 3 From T1 to T2, during this process, the intermediate film pulling component 200 continuously moves to the right. The length of the strip between the buffer component 300 and the lamination table 100 starts to increase. The strip below the film pulling component 200 becomes longer, and the strip above the film pulling component 200 becomes shorter. At this time, the buffer component 300 slowly moves to the left. During this process, the change in the length of the strip caused by the rightward movement of the film pulling component 200 is all absorbed or released by the buffer component 300. During the T1 - T2 process:

[0067]

[0068] Among them, S 缓 : Buffer component position, m; V 放 : Unwinding speed of the diaphragm, m / s; S1: Position of the buffer component at time T1, m; N: Number of buffer rollers of the buffer component; A: Acceleration of the movement of the lamination table.

[0069] Referring to Figure 3 and Figure 4 From T2 to T3, during this process, the intermediate film pulling component 200 continues to move to the right and decelerates, and the lamination table 100 continues to move to the right and decelerates. The length of the strip between the buffer component 300 and the lamination table 100 continues to increase. At this time, the buffer component 300 quickly moves to the right. During this process, the change in the length of the strip caused by the rightward movement of the film pulling component 200 is all absorbed or released by the buffer component 300. During the T2 - T3 process:

[0070] Among them, S 缓 : Buffer component position, m; V 放 : Unwinding speed of the diaphragm, m / s; S2: Position of the buffer component at time T2, m; S: Total stroke of the movement of the film pulling component, m; N: Number of buffer rollers of the buffer component; A: Acceleration of the movement of the lamination table.

[0071] From the movement process of the lamination mechanism 10 of an embodiment of the present application above, it can be seen that the movement curve of the first moving roller 320 of the buffer assembly 300 is related to N (the number of buffer rollers of the buffer assembly 300), a (the acceleration of the film pulling assembly 200), and A (the acceleration of the movement of the lamination table 100). After setting N-level buffering in this solution, the speed position change of the buffer shaft of the buffer assembly 300 is inversely proportional to the number of buffer rollers, so the pressure on the motor of the buffer assembly 300 and the buffer assembly 300 can be effectively reduced. Further, after the lamination table 100 and the film pulling shaft move simultaneously in this solution, the position of the maximum speed and maximum acceleration of the buffer shaft (the first moving roller 320) of the buffer assembly 300 during the time period from T1 to T2 can change the movement curve of the buffer shaft by adjusting the acceleration A of the lamination table 100, which can make the movement curve of the buffer shaft smoother, thereby ensuring the stability of the lamination operation.

[0072] Referring to Figure 1 and Figure 5 , in some embodiments, the lamination mechanism 10 includes a plurality of buffer assemblies 300, and the specific number of buffer assemblies 300 provided can be determined according to actual situations. Each buffer assembly 300 includes a first fixed roller 310 and a first moving roller 320. It can be understood that the axis 321 of the first fixed roller 310 can be arranged parallel to the axis 321 of the first moving roller 320. It should be noted that the axis 321 of each roller body of the buffer assembly 300 can be perpendicular to the first direction X. Additionally, each buffer assembly 300 can be arranged opposite to and spaced apart from each other along the second direction Y.

[0073] The buffer section 202 of the laminated web 20 is at least partially wound around the first fixed roller 310 and the first moving roller 320, that is, the buffer section 202 can be tensioned and the winding or unwinding operation can be realized. When the lamination table 100 and the film pulling assembly 200 approach each other along the first direction X, the first moving roller 320 approaches the first fixed roller 310 along the first direction X. Taking Figure 1 the orientation in

[0074] as a reference, when the lamination table 100 and the film pulling assembly 200 approach each other along the left-right direction, that is, the first moving roller 320 approaches the first fixed roller 310 along the left-right direction, the unwinding operation can be realized. Figure 1 , Figure 5 and Figure 6 , the following introduces the specific settings of the film pulling assembly 200. To facilitate the description and understanding of the structural arrangement of the film pulling assembly 200, the second direction Y is defined. In some embodiments, the film pulling assembly 200 includes a first pair of rollers 210 and a second pair of rollers 220 arranged opposite to each other along the second direction Y. The second direction Y is perpendicular to the first direction X. Taking Figure 5Taking the orientation in [the figure] as a reference, the first pair of rollers 210 and the second pair of rollers 220 are arranged in the up-and-down direction. It should be noted that the first pair of rollers 210 and the second pair of rollers 220 can be unpowered guide rollers or powered guide rollers. Some embodiments of the present application will be described by taking the first pair of rollers 210 and the second pair of rollers 220 both being unpowered guide rollers as an example.

[0075] Referring to Figure 1 , there is a first gap 211 between the first roller and the second roller in the first pair of rollers 210. There is a second gap 221 between the third roller and the fourth roller in the second pair of rollers 220. It can be understood that the size of the first gap 211 can be the same as or different from that of the second gap 221. The laminated segment 201 of the laminated strip 20 can pass through the first gap 211 of the first pair of rollers 210 and the second gap 221 of the second pair of rollers 220, that is, the film pulling assembly 200 can drive the laminated strip 20 to move stably along a specific path.

[0076] Referring to Figure 5 , in some embodiments, the laminating mechanism 10 further includes a first driving part 400. The first driving part 400 is connected to the film pulling assembly 200. In some embodiments, the first driving part 400 can be directly connected to the film pulling assembly 200. In some other embodiments, the first driving part 400 can also be indirectly connected to the film pulling assembly 200, that is, the first driving part 400 can drive an intermediate member, and the intermediate member drives the film pulling assembly 200 to move. The specific driving manner of the first driving part 400 can be determined according to the actual situation. The first driving part 400 can drive the film pulling assembly 200 to reciprocate in the first direction X, so as to lay the laminated segment 201 on the support surface 110.

[0077] Referring to Figure 5 , in some embodiments, the laminating mechanism 10 further includes a second driving part 500, and the second driving part 500 is connected to the laminating table 100. Specifically, in some embodiments, the second driving part 500 can be directly connected to the laminating table 100. In some other embodiments, the second driving part 500 can be indirectly connected to the laminating table 100, that is, the second driving part 500 can drive a connecting member, and the connecting member drives the laminating table 100 to reciprocate in the first direction X. The second driving part 500 is adapted to drive the laminating table 100 to reciprocate in the first direction X, so as to lay the laminated segment 201 on the support surface 110.

[0078] Referring to Figure 6, in some embodiments, the lamination mechanism 10 further includes a sliding assembly 600 for driving the lamination table 100 to move. The sliding assembly 600 includes a slider 610 and a slide rail 620 connected to each other. Specifically, in some embodiments, the slider 610 includes a chute, and the slide rail 620 includes a protrusion that can pass through the chute so that the slider 610 slides on the slide rail 620. In this solution, the slider 610 is connected to the lamination table 100, that is, the slider 610 can drive the lamination table 100 to slide on the slide rail 620 to achieve the lamination operation, ensuring the stability of lamination.

[0079] Refer to Figure 6 , in some embodiments, a first limiting member 621 and a second limiting member 622 are provided on the slide rail 620, and the limiting members are used to limit the sliding range of the slider 610. The first limiting member 621 and the second limiting member 622 are arranged opposite to and spaced apart from each other along the first direction X. The first limiting member 621 can be the same as or different from the setting of the second limiting member 622, depending on the actual situation.

[0080] It should be noted that the sliding assembly 600 is configured to have a first extreme position and a second extreme position. Refer to Figure 1 , at the first extreme position. The slider 610 abuts against the first limiting member 621, so the first limiting member 621 can limit the movement range of the slider 610, that is, the lamination table 100 can be stably maintained at the first extreme position. At this time, the film pulling assembly 200 is located on one side of the lamination table 100 along the first direction X, facilitating the lamination pressing knife of the lamination mechanism 10 to press the pole piece or the lamination segment 201.

[0081] Refer to Figure 4 , at the second extreme position, the slider 610 abuts against the second limiting member 622, so the second limiting member 622 can inhibit the movement range of the slider 610, that is, the lamination table 100 can be stably maintained at the second extreme position. At this time, the film pulling assembly 200 is located on the other side of the lamination table 100 along the first direction X, facilitating the lamination pressing knife of the lamination mechanism 10 to press the pole piece or the lamination segment 201.

[0082] Refer to Figure 5 , in some embodiments, the lamination mechanism 10 further includes a third driving part 700. To facilitate the description and understanding of the movement process of the buffer assembly 300, a third direction Z is defined. The third direction Z is perpendicular to the first direction X. With Figure 5Taking the orientation in it as a reference, the third direction Z is the front-back direction. The third driving part 700 is connected to each buffer component 300, and each first driving roller 320 has an axis 321 extending along the third direction Z. The third driving part 700 can drive each first driving roller 320 to rotate around each axis 321 to guide the buffer section 202 to the lamination table 100. After setting multiple levels of buffering in this solution, the pressure on the buffer component 300 can be reduced, that is, the selection difficulty of the third driving part 700 can be reduced, and the cost can be reduced. Additionally, the movement speed and movement acceleration of the laminated coil 20 can also be reduced, effectively reducing the inertial force of the roller passing, and greatly reducing the tension fluctuation of the laminated coil 20.

[0083] Reference Figure 1 、 Figure 5 And Figure 6 , in some embodiments, the lamination mechanism 10 includes a fixing part 800, and the fixing part 800 includes a second fixed roller 810 and a third fixed roller 820 arranged oppositely. There is a third gap 830 between the second fixed roller 810 and the third fixed roller 820, and the buffer section 202 passes through the third gap 830. It can be understood that the size of the third gap 830 can be equal to that of the above-mentioned first gap 211 and second gap 221. It should be noted that the second fixed roller 810 and the third fixed roller 820 can be arranged at intervals along the first direction X. Setting the fixing part 800 in this solution can improve the stability of the tension control of the laminated coil 20 and ensure that the lamination operation can be carried out continuously and stably.

[0084] In the second aspect of the embodiments of the present invention, a production line is proposed, and the production line includes the lamination mechanism 10 as described in the above embodiments. The production line of this solution can effectively increase the relative speed between the lamination table 100 and the film pulling assembly 200, improve the lamination efficiency, and can also effectively reduce the selection difficulty of the motor, save costs, and can reduce the situation of the pole piece slipping in the lamination table, prevent the lamination alignment from exceeding the tolerance, and ensure the yield rate of the battery cell. Additionally, this solution can also change the movement path of the laminated coil, reduce the convex change of its speed and acceleration, and ensure the stability of the tension control of the laminated coil 20, thereby improving the stability of the lamination operation.

[0085] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, then the directional indications are only used to explain the relative position relationship and movement conditions between components in a certain specific posture. If this specific posture changes, then the directional indications will also change accordingly.

[0086] In addition, if the embodiments of the present invention involve descriptions such as "first" and "second", the descriptions of "first", "second", etc. are for descriptive purposes only, and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or", "and / or", or "and / or" appear throughout the text, their meanings include three parallel scenarios. Taking "A and / or B" as an example, it includes Scenario A, or Scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0087] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A lamination mechanism (10) for laminating a lamination coil (20) and electrode sheets to form a battery cell by processing, wherein the lamination coil (20) includes a lamination segment (201) and a buffer segment (202), characterized in that, The lamination mechanism (10) includes: A lamination table (100), including a support surface (110) for supporting the lamination segment (201), and the lamination table (100) is configured to be reciprocally movable in a first direction parallel to the support surface (110); A film pulling assembly (200) for guiding the buffer segment (202) to the lamination table (100), and the film pulling assembly (200) is configured to be reciprocally movable in the first direction; Wherein, the moving direction of the film pulling assembly (200) is opposite to that of the lamination table (100).

2. The lamination mechanism (10) according to claim 1, wherein The lamination mechanism (10) includes a plurality of buffer assemblies (300), each of the buffer assemblies (300) includes a first fixed roller (310) and a first movable roller (320), and the buffer segment (202) is at least partially wound around the first fixed roller (310) and the first movable roller (320); when the lamination table (100) and the film pulling assembly (200) approach each other in the first direction, the first movable roller (320) approaches the first fixed roller (310) in the first direction.

3. The lamination mechanism (10) according to claim 1, wherein The film pulling assembly (200) includes a first pair of rollers (210) and a second pair of rollers (220) arranged oppositely in a second direction, and the lamination segment (201) is adapted to pass through a first gap (211) of the first pair of rollers (210) and a second gap (221) of the second pair of rollers (220), and the second direction is perpendicular to the first direction.

4. The lamination mechanism (10) according to claim 1, wherein The lamination mechanism (10) further includes a first driving part (400), the first driving part (400) is connected to the film pulling assembly (200), and the first driving part (400) is used to drive the film pulling assembly (200) to reciprocally move in the first direction so as to lay the lamination segment (201) on the support surface (110).

5. The lamination mechanism (10) according to claim 1, wherein The lamination mechanism (10) further includes a second driving part (500), the second driving part (500) is connected to the lamination table (100), and the second driving part (500) is adapted to drive the lamination table (100) to reciprocally move in the first direction so as to lay the lamination segment (201) on the support surface (110).

6. The lamination mechanism (10) according to claim 1, wherein The lamination mechanism (10) further includes a sliding assembly (600), the sliding assembly (600) includes a slider (610) and a slide rail (620) connected to each other, and the slider (610) is connected to the lamination table (100) so that the lamination table (100) slides on the slide rail (620).

7. The lamination mechanism (10) according to claim 6, wherein A first limiting member (621) and a second limiting member (622) are provided on the slide rail (620), and the first limiting member (621) and the second limiting member (622) are arranged opposite to and spaced apart from each other along the first direction; The sliding assembly (600) is configured to have a first extreme position and a second extreme position. At the first extreme position, the slider (610) abuts against the first limiting member (621), and the film pulling assembly (200) is located on one side of the laminating table (100) along the first direction; at the second extreme position, the slider (610) abuts against the second limiting member (622), and the film pulling assembly (200) is located on the other side of the laminating table (100) along the first direction.

8. The laminating mechanism (10) according to claim 2, wherein The laminating mechanism (10) further includes a third driving part (700). The third driving part (700) is connected to each of the buffer assemblies (300). Each of the first driving rollers (320) has an axis (321) extending in a third direction. The third driving part (700) is adapted to drive each of the first driving rollers (320) to rotate around each of the axes (321) to guide the buffer section (202) to the laminating table (100), and the third direction is perpendicular to the first direction.

9. The laminating mechanism (10) according to claim 1, wherein The laminating mechanism (10) includes a fixing part (800). The fixing part (800) includes a second fixed roller (810) and a third fixed roller (820) arranged opposite to each other. A third gap (830) is formed between the second fixed roller (810) and the third fixed roller (820), and the buffer section (202) passes through the third gap (830).

10. A production line, characterized in that, It includes the laminating mechanism (10) according to any one of claims 1-9.

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