Stacking machine

Abstract

The present application relates to a stacking machine, comprising a stacking platform, a feeding mechanism, a stacking mechanism, a deviation rectification platform and a conveying mechanism, wherein the deviation rectification platform can be moved between the stacking platform and the conveying mechanism; during the transfer of an electrode sheet to the stacking platform, the feeding mechanism acquires the electrode sheet on the conveying mechanism and moves toward the deviation rectification platform, the deviation rectification platform moves toward the conveying mechanism, and when moving above the deviation rectification platform, the feeding mechanism can place the electrode sheet on the deviation rectification platform; next, the feeding mechanism returns, and the deviation rectification platform moves toward the stacking platform while performing deviation rectification on the electrode sheet; meanwhile, the stacking mechanism moves toward the deviation rectification platform, and the stacking mechanism can acquire the electrode sheet on the deviation rectification platform when moving above the deviation rectification platform; and the stacking mechanism places the acquired electrode sheet onto the stacking platform, and the deviation rectification platform moves toward the conveying mechanism so as to prepare for the transfer of the next electrode sheet. It can be seen therefrom that the strokes of the feeding mechanism and the stacking mechanism can be significantly shortened, so that the electrode-sheet stacking tempo can be greatly accelerated, thereby improving the production efficiency of battery cells.

Description

stacking machine Technical Field

[0001] The present application relates to the technical field of lithium battery equipment, and in particular to a stacking machine. Background Art

[0002] Lamination is a common process in lithium-ion battery cell production. A battery cell is formed by alternately stacking positive and negative electrode sheets on a lamination table with a separator placed between them. Since the electrodes may shift during the incoming material processing, they are typically first placed on a deflection correction table by a feeding robot. Once the correction is complete, the lamination robot then places them back on the lamination table. Furthermore, the robot's long travel distance results in low cell production efficiency.

[0003] Application Contents

[0004] Based on this, it is necessary to provide a stacking machine that can improve the production efficiency of battery cells to address the above problems.

[0005] A stacking machine includes a stacking table, a blanking mechanism, a stacking mechanism, a deflection correction table and a conveying mechanism. The deflection correction table is used to carry and perform deflection correction operations on the electrodes. The conveying mechanism is used to convey the electrodes. The deflection correction table can move between the stacking table and the conveying mechanism. The blanking mechanism can obtain the electrodes on the conveying mechanism and place the electrodes on the deflection correction table. The stacking mechanism can obtain the electrodes on the deflection correction table and place the electrodes on the stacking table.

[0006] In one embodiment, the electrode sheets include positive electrode sheets and negative electrode sheets, and two conveying mechanisms are provided to convey the positive electrode sheets and the negative electrode sheets respectively. The two conveying mechanisms are respectively located on both sides of the stacking table, and two unloading mechanisms, stacking mechanisms and correction tables are each provided to cooperate with the two conveying mechanisms respectively.

[0007] In one embodiment, it also includes a diaphragm tension control device for conveying the diaphragm material strip to the lamination table, and the diaphragm tension control device can drive the diaphragm material strip to swing back and forth along the first direction, so that the diaphragm material strip is laid in a Z shape on the lamination table and arranged between two adjacent pole pieces.

[0008] In one embodiment, the diaphragm tension control device includes a tension maintaining mechanism, the tension maintaining mechanism including a first tension roller, a second tension roller, and a drive assembly, and the diaphragm material strip passing through the diaphragm tension control device can pass between the first tension roller and the second tension roller;

[0009] In which, the diaphragm material strip can be supported by the first tension roller and the second tension roller during the reciprocating swing along the first direction, the driving component can provide the first tension roller and the second tension roller with a supporting force acting on the diaphragm material strip, and the supporting force provided by the driving component is adjustable to tighten the diaphragm material strip and maintain a preset tension.

[0010] In one embodiment, the tension maintaining mechanism further includes a mounting bracket, a first swing arm and a second swing arm, one end of the first swing arm and the second swing arm are rotatably mounted on the mounting bracket, and the other end is respectively mounted with the first tension roller and the second tension roller, and the driving assembly transmits the supporting force to the first tension roller and the second tension roller respectively through the first swing arm and the second swing arm.

[0011] In one embodiment, the driving assembly includes a first driving member and a second driving member, wherein the first driving member and the second driving member are respectively connected to the first swing arm and the second swing arm, and provide supporting force for the first tension roller and the second tension roller respectively.

[0012] In one embodiment, the diaphragm tension control device also includes a swing roller mechanism, which is arranged downstream of the tension maintaining mechanism. The diaphragm material strip output by the tension maintaining mechanism can pass through the swing roller mechanism, and the swing roller mechanism can move back and forth along the first direction and drive the diaphragm material strip to swing back and forth along the first direction.

[0013] In one embodiment, the diaphragm tension control device further includes a tension sensor, which is capable of detecting the tension of the diaphragm material strip passing through the tension maintaining mechanism.

[0014] In one embodiment, the diaphragm tension control device further includes a buffer mechanism located on the upstream side of the tension maintaining mechanism, and the buffer mechanism is capable of buffering or releasing the diaphragm material strip.

[0015] In one embodiment, the diaphragm tension control device also includes an unwinding mechanism and a tensioning mechanism, wherein the tensioning mechanism is located between the unwinding mechanism and the cache mechanism, the unwinding mechanism can unwind the diaphragm material strip, and the tensioning mechanism can tension the diaphragm material strip between the unwinding mechanism and the cache mechanism.

[0016] In one embodiment, the tensioning mechanism includes a base, a rocker arm and a tensioning roller, one end of the rocker arm is rotatably mounted on the base, the tensioning roller is mounted on the end of the rocker arm away from the base, and the diaphragm material strip can pass around the tensioning roller.

[0017] In one embodiment, the diaphragm tension control device also includes a tension isolation mechanism located between the cache mechanism and the tensioning mechanism, and the diaphragm material strip passes through the tension isolation mechanism, and the tension isolation mechanism can isolate the tension of the diaphragm material strip between the cache mechanism and the tensioning mechanism.

[0018] In one embodiment, the tension-breaking mechanism includes a main drive roller and a pressure roller, and the diaphragm material strip can pass through and be clamped between the main drive roller and the pressure roller. The main drive roller can provide driving force to transport the diaphragm material strip to the cache mechanism.

[0019] In the above-mentioned stacking machine, during the process of transferring the electrode conveyed by the conveying mechanism to the stacking table for stacking, the unloading mechanism obtains the electrode on the conveying mechanism and moves toward the deflection correction table, and the deflection correction table then moves toward the conveying mechanism. When the unloading mechanism moves to the deflection correction table, the electrode can be placed on the deflection correction table. Then, the unloading mechanism returns to its position, and the deflection correction table moves toward the stacking table while correcting the electrode. At the same time, the stacking mechanism moves toward the deflection correction table, and when the stacking mechanism moves to the deflection correction table, the electrode on the deflection correction table can be obtained. The stacking mechanism places the obtained electrode on the stacking table, and the deflection correction table moves toward the conveying mechanism to prepare for the transfer of the next electrode. It can be seen from this that the stroke of the unloading mechanism and the stacking mechanism can be significantly shortened, so the stacking beat of the electrode can be significantly accelerated, thereby improving the production efficiency of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0021] FIG1 is a schematic structural diagram of a laminating machine in a preferred embodiment of the present application;

[0022] FIG2 is a schematic structural diagram of a diaphragm tension control device in the laminating machine shown in FIG1 ;

[0023] FIG3 is a schematic structural diagram of a tension maintaining mechanism in the diaphragm tension control device shown in FIG2 ;

[0024] FIG4 is a top view of the tension maintaining mechanism shown in FIG3 . DETAILED DESCRIPTION

[0025] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0026] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0028] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0029] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0030] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0031] 1 , a laminating machine 10 in a preferred embodiment of the present application includes a laminating table 200 , a material unloading mechanism 300 , a laminating mechanism 400 , a deflection correction table 500 , and a conveying mechanism 600 .

[0032] The conveying mechanism 600 is used to convey the electrode 12. The electrode 12 can be a single electrode or a composite electrode composed of multiple single electrode sheets and a separator. Specifically, in this embodiment, the electrode 12 is a single electrode and includes a positive electrode and a negative electrode.

[0033] The deflection correction platform 500 is used to carry the electrode 12 and perform deflection correction operations on the electrode 12. Specifically, the deflection correction platform 500 can drive the electrode 12 to translate and rotate, thereby adjusting the position and angle of the electrode 12. The deflection correction platform 500 generally also includes a deflection correction camera (not shown) to obtain image information of the electrode 12 to determine whether the electrode 12 is deflected.

[0034] The unloading mechanism 300 can take the electrode sheets 12 from the conveying mechanism 600 and place them on the deflection correction table 500. After the deflection correction table 500 corrects the electrode sheets 12, the stacking mechanism 400 can take the electrode sheets 12 from the deflection correction table 500 and place them on the stacking table 200. The stacking table 200 is used to support the separator and electrode sheets 12. After the required number of electrode sheets 12 are stacked on the stacking table 200, a battery cell is obtained.

[0035] Furthermore, the deflection correction platform 500 is capable of moving between the lamination platform 200 and the conveying mechanism 600. Specifically, a guide rail may be provided between the conveying mechanism 600 and the lamination platform 200, and the deflection correction platform 500 is mounted on the guide rail and is capable of sliding back and forth along the guide rail, so that the deflection correction platform 500 can move back and forth between the lamination platform 200 and the conveying mechanism 600.

[0036] When the unloading mechanism 30 transfers the electrode piece 12 from the conveying mechanism 600 to the deflection correction platform 500, the deflection correction platform 500 moves toward the conveying mechanism 600, and the unloading mechanism 300, after receiving the electrode piece 12 from the conveying mechanism 600, moves toward the deflection correction platform 500. When the unloading mechanism 300 moves above the deflection correction platform 500, it can place the electrode piece 12 on the deflection correction platform 500. After the unloading mechanism 300 places the electrode piece 12, the unloading mechanism 300 returns to its original position and prepares to receive the next electrode piece 12. It can be seen that during the process of transferring the electrode piece 12 to the deflection correction platform 500, since the deflection correction platform 500 and the unloading mechanism 300 move toward each other, the stroke of the unloading mechanism 300 can be reduced.

[0037] After the pole piece 12 is transferred to the deflection correction table 500, the deflection correction table 500 corrects the pole piece 12. At the same time, the deflection correction table 200 will turn around and move toward the stacking table 200, and the stacking mechanism 400 will move toward the deflection correction table 200 at the same time. When the stacking mechanism 400 moves above the deflection correction table 500, the pole piece 12 that has been deflected on the deflection correction table 500 can be obtained. After obtaining the pole piece 12, the stacking mechanism 400 moves toward the stacking table 200 and places the pole piece 12 on the stacking table 200. The deflection correction table 500 turns around again and moves toward the conveying mechanism 600 to prepare to receive the next pole piece 12. It can be seen that in the process of transferring the pole piece 12 to the stacking table 200, since the deflection correction table 500 and the stacking mechanism 400 move toward each other, the stroke of the stacking mechanism 400 can also be reduced.

[0038] In this cycle, as the deflection correction platform 500 reciprocates between the conveyor mechanism 600 and the laminating platform 200, multiple electrode sheets 12 are sequentially transferred to the laminating platform 200 for stacking, thereby producing a battery cell. Furthermore, because the travel of the unloading mechanism 300 and the laminating mechanism 400 can be significantly shortened during the laminating process, the cycle time of the unloading mechanism 300 and the laminating mechanism 400 can be significantly accelerated, thereby improving the production efficiency of the battery cells.

[0039] In this embodiment, two conveying mechanisms 600 are provided and respectively convey the positive electrode sheets and the negative electrode sheets. The two conveying mechanisms 600 are respectively located on both sides of the stacking table 200. There are two unloading mechanisms 300, stacking mechanisms 400 and correction tables 500 and they respectively cooperate with the two conveying mechanisms 600.

[0040] Taking Figure 1 as an example, two conveying mechanisms 600 are located on the left and right sides of the laminating table 200, respectively. The conveying mechanism 600 on the left is used to convey positive electrode sheets, and the conveying mechanism 600 on the right is used to convey negative electrode sheets. The unloading mechanism 300, which cooperates with the conveying mechanism 600 on the left, can first transfer the positive electrode sheets to the deflection correction table 500 on the left, and then the laminating mechanism 400 on the left transfers the positive electrode sheets from the deflection correction table 500 to the laminating table 200. The unloading mechanism 300, which cooperates with the conveying mechanism 600 on the right, can first transfer the negative electrode sheets to the deflection correction table 500 on the right, and then the laminating mechanism 400 on the right transfers the negative electrode sheets from the deflection correction table 500 to the laminating table 200.

[0041] The two stacking structures 400 alternately place electrode sheets 20 onto the stacking table 200. This allows positive and negative electrode sheets to be alternately stacked on the stacking table 200 to produce battery cells. Furthermore, because the positive and negative electrode sheets are transported and transferred independently, using separate mechanisms, mixing up the positive and negative electrode sheets is effectively avoided.

[0042] It should be noted that in other embodiments, only one set of the unloading mechanism 300, the laminating mechanism 400, the deflection correction platform 500, and the conveying mechanism 600 may be provided to convey and transfer the positive and negative electrode sheets. In this case, the positive and negative electrode sheets can be pre-alternated on the conveying mechanism 600, and the conveying mechanism 600 can then alternately convey the positive and negative electrode sheets to a position where they can be picked up by the unloading mechanism 300, thereby alternately placing them on the laminating platform 200.

[0043] Positive and negative electrode sheets are alternately stacked on the lamination table 200, with adjacent electrode sheets 12 separated by a separator. Furthermore, in this embodiment, the lamination machine 100 further includes a separator tension control device 100 for conveying a separator strip 11 to the lamination table 200. The separator tension control device 100 is capable of driving the separator strip 11 to swing back and forth in a first direction, so that the separator strip 11 is laid in a Z-shape on the lamination table 200 and positioned between adjacent electrode sheets 12.

[0044] While the diaphragm strip 11 is being laid in a Z shape, the stacking mechanism 400 can alternately place the positive and negative electrode sheets on the stacking table 200, and the diaphragm strip 11 is folded once each time a electrode sheet 12 is placed, so that adjacent electrode sheets 12 are separated by the diaphragm; the above operation is repeated until the stacked electrode sheets 12 reach the required number of layers to complete the preparation of a battery cell, and the diaphragm strip 11 laid on the stacking table 200 is folded into a "Z" shape.

[0045] The Z-shaped folding method is used to arrange the diaphragm, which can improve processing efficiency. It should be noted that in other embodiments, the diaphragm can also be cut into diaphragm sheets, and a layer of diaphragm sheet is placed on each electrode 12, so that two adjacent electrode pieces 12 can be separated by a diaphragm.

[0046] Please also refer to FIG. 2 . In this embodiment, the diaphragm tension control device 100 includes a buffer mechanism 110 and a tension maintaining mechanism 120 .

[0047] The membrane strip 11 used for lamination can sequentially pass through the buffer mechanism 110 and the tension maintaining mechanism 120. The buffer mechanism 110 can buffer or release the membrane strip 11. The buffer mechanism 110 generally includes multiple buffer rollers 111, and the relative positions of the multiple buffer rollers 111 can be adjusted. The membrane strip 11 passing through the buffer mechanism 110 can be sequentially wound around the multiple buffer rollers 111. The multiple buffer rollers 111 can buffer or release the membrane strip 11 by adjusting their relative positions.

[0048] When there is a surplus of membrane strip 11, the buffer mechanism 110 can buffer the excess membrane strip 11. When there is a shortage of membrane strip 11, the buffer mechanism 110 can release membrane strip 11 to compensate for the shortage. This prevents the membrane strip 11 from becoming loose or breaking. Obviously, in other embodiments, if the fluctuation of the membrane strip 11 during actual operation is minimal, the buffer mechanism 110 can be omitted.

[0049] 3 and 4 , the tension maintaining mechanism 120 includes a first tension roller 121 , a second tension roller, and a driving assembly 123 . The membrane strip 11 passing through the tension maintaining mechanism 120 can pass between the first tension roller 121 and the second tension roller 122 .

[0050] During the lamination process, the membrane strip 11 is delivered by the tension-maintaining mechanism 120 and laid in a Z-shape on the lamination table 200. During this process, the membrane strip 11 reciprocates in a first direction relative to the lamination table 200 and between the first tension roller 121 and the second tension roller 122. Furthermore, during this reciprocating swing, the membrane strip 11 is supported by the first tension roller 121 and the second tension roller 122, thereby keeping the membrane strip 11 taut.

[0051] In this embodiment, the diaphragm tension control device 100 also includes a swing roller mechanism 170, which is arranged downstream of the tension maintaining mechanism 120. The diaphragm material strip 11 output by the tension maintaining mechanism 120 can pass through the swing roller mechanism 170. The swing roller mechanism 170 can move back and forth along the first direction and drive the diaphragm material strip 11 to swing back and forth along the first direction.

[0052] Specifically, the swing roller mechanism 170 generally includes two opposing clamping rollers, between which the membrane strip 11 outputted by the tension maintaining mechanism 120 passes. As the swing roller mechanism 170 reciprocates in a first direction, it drives the membrane strip 11 to swing back and forth in the first direction and achieve Z-shaped folding.

[0053] Furthermore, the drive assembly 123 can provide support force for the first tension roller 121 and the second tension roller 122 to act on the diaphragm material strip 11. The support force provided by the drive assembly 123 is adjustable to tighten the diaphragm material strip 11 and maintain a preset tension. When the diaphragm material strip 11 swings toward the first tension roller 121, the first tension roller 121 can abut against the diaphragm material strip 11 and tighten it; when the diaphragm material strip 11 swings toward the second tension roller 122, the second tension roller 122 can abut against the diaphragm material strip 11 and tighten it.

[0054] Taking Figure 2 as an example, the first direction refers to the left and right direction. The first tension roller 121 is located on the left and the second tension roller 122 is located on the right, and the diaphragm strip 11 swings left and right during the lamination process. When the diaphragm strip 11 swings to the left, the first tension roller 121 can abut against the diaphragm strip 11 and tension it; when the diaphragm strip 11 swings to the right, the second tension roller 122 can abut against the diaphragm strip 11 and tension it. Moreover, the first tension roller 121 and the second tension roller 122 can move under the drive of the drive assembly 123, thereby adjusting the tensioning degree of the diaphragm strip 11. Therefore, by controlling the supporting force of the first tension roller 121 and the second tension roller 122 in real time, the preset tension can be maintained by controlling the tensioning degree of the diaphragm strip 11.

[0055] More specifically, when the diaphragm material strip 11 swings to the left and is tensioned by the first tension roller 121, if it is detected that the tension of the diaphragm material strip 11 is greater than the preset tension, the driving component 123 can reduce the supporting force of the first tension roller 121 on the diaphragm material strip 11, thereby reducing the tensioning degree of the diaphragm material strip 11, so that the tension of the diaphragm material strip 11 is reduced and approaches the preset tension; if it is detected that the tension of the diaphragm material strip 11 is less than the preset tension, the driving component 123 can increase the supporting force of the first tension roller 121 on the diaphragm material strip 11, thereby increasing the tensioning degree of the diaphragm material strip 11, so that the tension of the diaphragm material strip 11 is increased and approaches the preset tension.

[0056] Similarly, when the diaphragm material strip 11 swings to the right and is tensioned by the second tension roller 122, if it is detected that the tension of the diaphragm material strip 11 is greater than the preset tension, the driving component 123 can reduce the supporting force of the second tension roller 122 on the diaphragm material strip 11, thereby reducing the tension on the diaphragm material strip 11; and if it is detected that the tension of the diaphragm material strip 11 is less than the preset tension, the driving component 123 can increase the supporting force of the second tension roller 122 on the diaphragm material strip 11, thereby increasing the tension on the diaphragm material strip 11.

[0057] Specifically, in this embodiment, the diaphragm tension control device 100 further includes a tension sensor 130 capable of detecting the tension of the diaphragm web 11 passing through the buffer mechanism 110 and the tension maintaining mechanism 120. The tension sensor 130 can monitor the tension of the diaphragm web 11 in real time, thereby facilitating the drive assembly 123 to dynamically adjust the supporting force of the first tension roller 121 and the second tension roller 122 based on the real-time tension, thereby precisely controlling the tension of the diaphragm web 11.

[0058] Furthermore, if the diaphragm strip 11 becomes redundant or insufficient during its swinging process, the buffer mechanism 110 can buffer or release the diaphragm strip 11, thereby preventing the diaphragm strip 11 from becoming loose or breaking. Thus, with the cooperation of the buffer mechanism 110 and the tension-maintaining mechanism 120, the tension of the diaphragm strip 11 can be maintained stable during the lamination process, thereby preventing problems such as wrinkling or shrinkage of the diaphragm strip 11 and improving the quality of the battery cell.

[0059] In this embodiment, the tension maintaining mechanism 120 also includes a mounting bracket 124, a first swing arm 125 and a second swing arm 126. One end of the first swing arm 125 and the second swing arm 126 are rotatably mounted on the mounting bracket 124, and the other end is respectively mounted with a first tension roller 121 and a second tension roller 122. The driving component 123 transmits the supporting force to the first tension roller 121 and the second tension roller 122 through the first swing arm 125 and the second swing arm 126.

[0060] Specifically, the mounting bracket 124 is provided with a first rotating shaft 127 and a second rotating shaft 128 that are parallel to each other, and the first swing arm 125 and the second swing arm 126 are respectively mounted on the first rotating shaft 127 and the second rotating shaft 128. The first rotating shaft 127 and the second rotating shaft 128 can rotate around their own axes, thereby allowing the first swing arm 125 and the second swing arm 126 to swing.

[0061] In this way, the positions of the first tension roller 121 and the second tension roller 122 can also be changed under the influence of the separator strip 11. For example, when the tension of the separator strip 11 suddenly increases, the reaction force exerted by the separator strip 11 on the first tension roller 121 and the second tension roller 122 will be greater than the supporting force, forcing the first tension roller 121 and the second tension roller 122 to retreat, thereby acting as a buffer and preventing the separator strip 11 from breaking. Moreover, the retreat of the first tension roller 121 and the second tension roller 122 drives the first swing arm 125 and the second swing arm 126 to swing, and the movement trajectory of the first tension roller 121 and the second tension roller 122 is circular, thereby reducing the friction between the first tension roller 121 and the second tension roller 122 and the separator strip 11.

[0062] Specifically, in this embodiment, the first tension roller 121 and the second tension roller 122 are rotatably mounted on the first swing arm 125 and the second swing arm 126, respectively, and are capable of rotating about their respective axes. Thus, when the first tension roller 121 and the second tension roller 122 abut against the diaphragm strip 11, they can roll along the surface of the diaphragm strip 11, thereby preventing scratches on the diaphragm strip 11.

[0063] Furthermore, in this embodiment, the driving assembly 123 includes a first driving member 1231 and a second driving member 1232. The first driving member 1231 and the second driving member 1232 are respectively connected to the first swing arm 125 and the second swing arm 126, and provide support force for the first tension roller 121 and the second tension roller 122 respectively.

[0064] Since the first driving member 1231 and the second driving member 1232 can provide supporting force for the first tension roller 121 and the second tension roller 122 respectively, the supporting force of the first tension roller 121 and the second tension roller 122 acting on the diaphragm material strip 11 can be controlled and adjusted individually, thereby improving the accuracy of tension control for the diaphragm material strip 11.

[0065] Specifically, both the first and second drive members 1231, 1232 can be pneumatic cylinders, controlled in real time by an electrical proportional valve. Based on the real-time tension of the diaphragm strip 11, a control signal is generated. The electrical proportional valve controls the air intake and output of the cylinders based on this control signal, thereby adjusting the supporting force provided by the first and second drive members 1231, 1232 to the first and second tension rollers 121, 122 in real time, ensuring that the diaphragm strip 11 maintains a preset tension.

[0066] It should be noted that, in other embodiments, the first driving member 1231 and the second driving member 1232 may also be springs, which are pre-compressed to generate the supporting force provided to the first tension roller 121 and the second tension roller 122. Moreover, the supporting force of the first tension roller 121 and the second tension roller 122 can be adjusted by controlling the pre-compression amount of the springs in real time.

[0067] Referring again to FIG. 2 , in this embodiment, the diaphragm tension control device 100 further includes an unwinding mechanism 140 and a tensioning mechanism 150 . The tensioning mechanism 150 is located between the unwinding mechanism 140 and the buffer mechanism 110 . The unwinding mechanism 140 can unwind the diaphragm strip 11 , and the tensioning mechanism 150 can tighten the diaphragm strip 11 between the unwinding mechanism 140 and the buffer mechanism 110 .

[0068] The unwinding mechanism 140 may include a tensioning shaft, on which the roll of the membrane material strip 11 may be pre-clamped. The tensioning mechanism 150 can maintain a certain tension on the membrane material strip 11 unwound by the unwinding mechanism 140 to ensure a smooth unwinding process.

[0069] Furthermore, in this embodiment, the tensioning mechanism 150 includes a base 151, a rocker arm 152 and a tensioning roller 153. One end of the rocker arm 152 is rotatably mounted on the base 151, and the tensioning roller 153 is mounted on the end of the rocker arm 152 away from the base 151. The diaphragm material strip 11 can pass around the tensioning roller 153.

[0070] The rocker arm 152 can be connected to components such as a cylinder and an elastic member, thereby applying a pre-tightening force to the tensioning roller 153 so that the tensioning roller 153 tensions the diaphragm material strip 11 .

[0071] In this embodiment, the diaphragm tension control device 100 also includes a tension isolation mechanism 160 located between the cache mechanism 110 and the tensioning mechanism 150. The diaphragm material strip 11 passes through the tension isolation mechanism 160, and the tension isolation mechanism 160 can isolate the tension of the diaphragm material strip 11 between the cache mechanism 110 and the tensioning mechanism 150.

[0072] In other words, the tension of the diaphragm strip 11 on either side of the tension isolation mechanism 160 can differ. The tension isolation mechanism 160 can isolate the unwinding tension, preventing tension fluctuations during the unwinding process from being transmitted to the isolation buffer mechanism 110 and the tension maintaining mechanism 120. This prevents tension fluctuations during the unwinding process from interfering with the diaphragm strip 11 during the lamination process, thereby further improving the stability of the tension of the diaphragm strip 11 during the lamination process.

[0073] Specifically, in this embodiment, the tension isolation mechanism 160 includes a main drive roller 161 and a pressure roller 162. The diaphragm material strip 11 can pass through and be clamped between the main drive roller 161 and the pressure roller 162. The main drive roller 161 can provide driving force to transport the diaphragm material strip 11 to the cache mechanism 110.

[0074] The clamping force between the main drive roller 161 and the pressure roller 162 effectively separates the two sides of the membrane strip 11, thereby isolating the unwinding tension. Furthermore, driven by the main drive roller 161, the membrane strip 11 is smoothly conveyed to the buffer mechanism 110, thereby continuously supplying the membrane strip 11 for the lamination process.

[0075] In addition, the diaphragm tension control device 100 generally further includes a large plate 180 . Components such as the buffer mechanism 110 , the tension maintaining mechanism 120 , the tension sensor 130 , the unwinding mechanism 140 , the tensioning mechanism 150 , and the tension interrupting mechanism 160 can all be mounted on the large plate 180 .

[0076] In the stacking machine 10, when transferring the electrode 12 conveyed by the conveying mechanism 600 to the stacking table 200 for stacking, the unloading mechanism 300 retrieves the electrode from the conveying mechanism 600 and moves toward the deflection correction table 500. The deflection correction table 500 then moves toward the conveying mechanism 600. When the unloading mechanism 300 moves onto the deflection correction table 500, the electrode 12 can be placed on the deflection correction table 500. Then, the unloading mechanism 300 returns to its original position, and the deflection correction table 500 moves toward the stacking table 200 while correcting the deflection of the electrode 12. At the same time, the stacking mechanism 400 moves toward the deflection correction table 500. When the stacking mechanism 400 moves onto the deflection correction table 500, the electrode 12 can be retrieved from the deflection correction table 500. The stacking mechanism 400 places the retrieved electrode 12 on the stacking table 200, and the deflection correction table 500 moves toward the conveying mechanism 600 to prepare for the transfer of the next electrode 12. It can be seen from this that the strokes of the unloading mechanism 300 and the laminating mechanism 400 can be significantly shortened, so the laminating cycle of the electrode sheets 12 can be significantly accelerated, thereby improving the production efficiency of the battery cell.

[0077] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0078] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A laminating machine, comprising a laminating table, a feeding mechanism, a laminating mechanism, a deflection correction table and a conveying mechanism, wherein the deflection correction table is used to carry and correct the pole pieces, and the conveying mechanism is used to convey the pole pieces, characterized in that: The deflection correction table can move between the stacking table and the conveying mechanism; the unloading mechanism can obtain the pole piece on the conveying mechanism and place the pole piece on the deflection correction table; the stacking mechanism can obtain the pole piece on the deflection correction table and place the pole piece on the stacking table.

2. The laminating machine according to claim 1, characterized in that: The electrode sheets include positive electrode sheets and negative electrode sheets. Two conveying mechanisms are provided and respectively convey the positive electrode sheets and the negative electrode sheets. The two conveying mechanisms are respectively located on both sides of the stacking table. Two unloading mechanisms, the stacking mechanisms and the deviation correction table are provided and respectively cooperate with the two conveying mechanisms.

3. The laminating machine according to claim 1, characterized in that: It also includes a diaphragm tension control device for conveying the diaphragm material strip to the lamination table, and the diaphragm tension control device can drive the diaphragm material strip to swing back and forth along a first direction, so that the diaphragm material strip is laid in a Z shape on the lamination table and arranged between two adjacent pole pieces.

4. The laminating machine according to claim 3, characterized in that: The diaphragm tension control device comprises a tension holding mechanism, and the tension holding mechanism comprises a first tension roller, a second tension roller and a driving assembly, and the diaphragm material strip passing through the diaphragm tension control device can pass between the first tension roller and the second tension roller; In which, the diaphragm material strip can be supported by the first tension roller and the second tension roller during the reciprocating swing along the first direction, the driving component can provide the first tension roller and the second tension roller with supporting force acting on the diaphragm material strip, and the supporting force provided by the driving component is adjustable to tighten the diaphragm material strip and maintain a preset tension.

5. The laminating machine according to claim 4, characterized in that: The tension maintaining mechanism also includes a mounting bracket, a first swing arm and a second swing arm, one end of the first swing arm and the second swing arm are rotatably mounted on the mounting bracket, and the other end is respectively mounted with the first tension roller and the second tension roller, and the driving component transmits the supporting force to the first tension roller and the second tension roller respectively through the first swing arm and the second swing arm.

6. The laminating machine according to claim 5, characterized in that: The driving assembly includes a first driving member and a second driving member, wherein the first driving member and the second driving member are respectively connected to the first swing arm and the second swing arm, and respectively provide supporting force for the first tension roller and the second tension roller.

7. The laminating machine according to claim 4, characterized in that: The diaphragm tension control device also includes a swing roller mechanism, which is arranged downstream of the tension maintaining mechanism. The diaphragm material strip output by the tension maintaining mechanism can pass through the swing roller mechanism. The swing roller mechanism can move back and forth along the first direction and drive the diaphragm material strip to swing back and forth along the first direction.

8. The laminating machine according to claim 4, characterized in that: The diaphragm tension control device also includes a tension sensor, which can detect the tension of the diaphragm material strip passing through the tension maintaining mechanism.

9. The laminating machine according to any one of claims 4 to 8, characterized in that: The diaphragm tension control device further comprises a buffer mechanism located at an upstream side of the tension holding mechanism, and the buffer mechanism is capable of buffering or releasing the diaphragm material strip.

10. The laminating machine according to claim 9, characterized in that: The diaphragm tension control device also includes an unwinding mechanism and a tensioning mechanism. The tensioning mechanism is located between the unwinding mechanism and the cache mechanism. The unwinding mechanism can unwind the diaphragm material strip, and the tensioning mechanism can tension the diaphragm material strip between the unwinding mechanism and the cache mechanism.

11. The laminating machine according to claim 10, characterized in that: The tensioning mechanism includes a base, a rocker arm and a tensioning roller. One end of the rocker arm is rotatably mounted on the base. The tensioning roller is mounted on one end of the rocker arm away from the base. The diaphragm material strip can pass around the tensioning roller.

12. The laminating machine according to claim 10, characterized in that: The diaphragm tension control device also includes a tension isolation mechanism located between the buffer mechanism and the tensioning mechanism. The diaphragm material strip passes through the tension isolation mechanism, and the tension isolation mechanism can isolate the tension of the diaphragm material strip between the buffer mechanism and the tensioning mechanism.

13. The laminating machine according to claim 12, characterized in that: The tension isolation mechanism includes a main driving roller and a pressure roller, and the diaphragm material strip can pass through and be clamped between the main driving roller and the pressure roller. The main driving roller can provide a driving force to transport the diaphragm material strip to the buffer mechanism.

Images