Piece making device and cutting and stacking all-in-one machine

Abstract

The utility model relates to a flaking device and a cutting and stacking all-in-one machine. The flaking device comprises a first die cutting mechanism, a conveying mechanism and a switching mechanism. The first die cutting mechanism comprises a first lower die and a first upper die, the first upper die is pressed downwards relative to the first lower die, a pole piece material belt conveyed to the position between the first lower die and the first upper die by the conveying mechanism can be cut into pole pieces, and the pole pieces are cut on the first upper die through the interval of lifting and pressing downwards relative to the first lower die. And the discharging transfer assembly can move the pole piece on the first lower die out of the first die cutting mechanism. When the first upper die is lifted up, the first upper die can avoid the discharging transfer assembly, so that the position of the first lower die can be kept fixed, the first upper die is alternately pressed down and lifted up according to the preset frequency, the pole piece material belt can be sequentially cut into the pole pieces, and the pole piece production takt time can be remarkably improved. In addition, a plurality of pole pieces can be obtained by cutting through one-time pressing of the first upper die. Therefore, the tablet production efficiency of the tablet production device and the cutting and stacking all-in-one machine is remarkably improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery equipment, and particularly relates to a sheet making device and a slitting and laminating integrated machine. Background Art

[0002] As a storage element with excellent performance, lithium batteries have been widely used in fields such as electric vehicles and digital products. The battery core of a lithium battery is formed by laminating pole pieces and diaphragms. In the process of preparing the battery core by using a slitting and laminating integrated machine, it is necessary to first cut the pole piece strip into pole pieces, and then stack the pole pieces and the diaphragms. At present, the pole piece strip is generally cut into pole pieces in a one-piece punching and cutting manner. However, with the increasing demand for battery cores, the efficiency of the above sheet making method is relatively low and it is difficult to meet the demand. Summary of the Utility Model

[0003] Based on this, it is necessary to provide a sheet making device and a slitting and laminating integrated machine that can improve the sheet making efficiency in view of the above problems.

[0004] A sheet making device includes:

[0005] A conveying mechanism for conveying a pole piece strip;

[0006] A first die cutting mechanism including a first lower die and a first upper die. The first upper die can be lifted and pressed down relative to the first lower die. The pole piece strip can enter between the first lower die and the first upper die under the conveyance of the conveying mechanism, and each time the first upper die is pressed down, the pole piece strip can be cut into a plurality of pole pieces; and

[0007] A transfer mechanism including a discharge transfer assembly and a discharge conveying assembly. The discharge transfer assembly can grab the pole pieces located in the first lower die at the interval between the lifting and pressing down of the first upper die, and move out the plurality of pole pieces obtained by pressing down the first upper die once.

[0008] In one embodiment, it further includes a second die cutting mechanism. The second die cutting mechanism is arranged upstream of the conveying mechanism. The pole piece strip can pass through the second die cutting mechanism under the traction of the conveying mechanism. The second die cutting mechanism can process pole ears and round corners at the edges of the pole piece strip, and the first upper die can be pressed down to cut the pole piece strip to obtain pole pieces.

[0009] In one embodiment, the second die cutting mechanism includes two relatively arranged second dies. The two side edges in the width direction of the pole piece strip passing through the second die cutting mechanism can respectively pass through the two second dies, and the distance between the two second dies is adjustable.

[0010] In one embodiment, the first upper die includes a plurality of cutting blades arranged in parallel and at equal intervals. When the first upper die presses down, a pole piece can be cut out between two adjacent cutting blades.

[0011] In one embodiment, the distance between the plurality of cutting blades is adjustable.

[0012] In one embodiment, adsorption holes communicating with the negative pressure chamber are formed on the surface of the first lower die.

[0013] In one embodiment, the transfer mechanism further includes a discharging conveying assembly, and the discharging transfer assembly can transfer the pole piece located on the first lower die to the discharging conveying assembly.

[0014] In one embodiment, the transfer mechanism further includes a visual detection assembly, and the visual detection assembly is used to obtain image information of the pole piece on the discharging conveying assembly.

[0015] In one embodiment, the transfer mechanism further includes a variable-spacing transfer assembly, a positioning platform and a blanking transfer assembly. The variable-spacing transfer assembly is used to transfer the pole piece on the discharging conveying assembly to the positioning platform and increase the distance between two adjacent pole pieces. The blanking transfer assembly is used to grab the pole piece on the positioning platform and blank it.

[0016] In one embodiment, it further includes a blanking conveying mechanism and an NG bin. The blanking transfer assembly can blank the pole piece grabbed from the positioning platform to the blanking conveying mechanism or the NG bin.

[0017] In one embodiment, the transfer mechanisms are respectively arranged on two opposite sides of the first die-cutting mechanism, and the discharging transfer assemblies of the two transfer mechanisms on both sides can alternately grab the pole pieces located on the first lower die.

[0018] A slitting and laminating integrated machine includes the sheet-making device according to any one of the above preferred embodiments.

[0019] In the above sheet-making device and slitting and laminating integrated machine, the first upper die can cut the pole piece strip conveyed by the conveying mechanism between the first lower die and the first upper die into pole pieces by pressing down relative to the first lower die. During the interval when the first upper die lifts and presses down relative to the first lower die, the discharging transfer assembly can move the pole piece on the first lower die out of the first die-cutting mechanism. When the first upper die lifts, it can avoid the discharging transfer assembly. Therefore, the first lower die can keep its position fixed. By alternately pressing down and lifting the first upper die at a preset frequency, the pole piece strip can be successively cut into pole pieces, thereby significantly improving the sheet-making beat. Moreover, multiple pole pieces can be cut out by one press-down of the first upper die. Therefore, the sheet-making efficiency of the above sheet-making device and slitting and laminating integrated machine is significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 It is a top view of the film-making device in the preferred embodiment of the present utility model;

[0022] Figure 2 is Figure 1 the front view of the shown film-making device. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] In order to make the above objects, features and advantages of the present utility model more obvious and understandable, the following will make a detailed description of the specific embodiments of the present utility model in conjunction with the drawings. Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein. Those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0024] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model.

[0025] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0026] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "linkage", "fixation", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral one; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature is at a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature is at a lower horizontal height than the second feature.

[0028] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.

[0029] Please refer to Figure 1 , the present utility model provides a sheet making device 100 and a slitting and laminating integrated machine (not shown in the figure). Among them, the above-mentioned slitting and laminating integrated machine includes the sheet making device 100.

[0030] The sheet making device 100 is capable of preparing electrode sheets, and the prepared electrode sheets can be positive electrode sheets or negative electrode sheets. The above-mentioned slitting and laminating integrated machine generally further includes a laminating device (not shown in the figure), and the laminating device is capable of alternately laminating the electrode sheets prepared by the sheet making device 100 and the separator to obtain an electric core.

[0031] Please refer to together Figure 2 , in a preferred embodiment of the present utility model, the sheet making device 100 includes a conveying mechanism 110, a first die cutting mechanism 120 and a transfer mechanism 130.

[0032] The conveying mechanism 110 can traction the pole piece strip 20 and convey the pole piece strip 20 to the first die-cutting mechanism 120. Specifically, in this embodiment, the conveying mechanism 110 uses two pinch rollers to clamp the pole piece strip 20, and one of the pinch rollers is the main area roller. Driven by the main area roller, the clamped pole piece strip 20 can be conveyed to the downstream first die-cutting mechanism 120.

[0033] The first die-cutting mechanism 120 includes a first lower die 121 and a first upper die 122. Among them, the first upper die 122 can be lifted and pressed down relative to the first lower die 121, and the pole piece strip 20 can enter between the first lower die 121 and the first upper die 122 under the conveyance of the conveying mechanism 110. Moreover, each time the first upper die 122 is pressed down, the pole piece strip 20 can be cut into a plurality of pole pieces 21.

[0034] A die-cutting plate with a required shape is pre-formed on the first lower die 121 or the first upper die 122. When the first upper die 122 is pressed down, the pole piece strip 20 can be pressed against the first lower die 121, and the pole piece strip 20 can be cut into pole pieces 21 through the die-cutting plate. When the first upper die 122 is lifted, the cut pole pieces 21 remain on the surface of the first lower die 121.

[0035] Specifically in this embodiment, the surface of the first lower die 121 is provided with suction holes (not shown in the figure) communicating with the negative pressure cavity. The suction holes can form a negative pressure on the surface of the first lower die 121 to adsorb the cut pole pieces 21, thereby preventing the pole pieces 21 from adhering to the first upper die 122 and moving up with it. In addition, waste materials, dust, etc. generated by cutting can be sucked away through the suction holes, thereby preventing the die-cutting space from being contaminated and affecting the cutting accuracy.

[0036] In addition, in this embodiment, the sheet making device 100 further includes a second die-cutting mechanism 140. The second die-cutting mechanism 140 is arranged upstream of the conveying mechanism 110, and the pole piece strip 20 can pass through the second die-cutting mechanism 140 under the traction of the conveying mechanism 110. The second die-cutting mechanism 140 can process pole ears and rounded corners on the edge of the pole piece strip 20, and the first upper die 122 can be pressed down to cut the pole piece strip 20 to obtain the pole pieces 21.

[0037] The pole piece 21 formed by die-cutting twice by the first die-cutting mechanism 120 and the second die-cutting mechanism 140 includes at least one tab, and at least one top angle is a rounded corner. Preferably, all four top angles are rounded corners. The rounded corners enable the pole piece 21 to have no sharp edges and corners, which can avoid piercing the separator during the subsequent stacking process of preparing the battery cell, thereby improving the safety of the battery cell. Further, since the pole piece 21 is formed in two steps, and its tabs and rounded corners are formed by the second die-cutting mechanism 140, the first die-cutting mechanism 120 only needs to cut the pole piece strip 20 during die-cutting. This simplifies the die structures of both the first die-cutting mechanism 120 and the second die-cutting mechanism 140 compared to the die structure of one-piece punching and cutting, thus contributing to improving the forming accuracy of the pole piece 21.

[0038] Moreover, the degrees of wear of the die during the processing of the tabs and the cutting of the pole piece strip 20 are different. Therefore, if a die for one-piece punching and cutting is used to simultaneously process the tabs and cut the pole piece strip 20, it will cause uneven wear of the die, resulting in the need to replace the entire die. By using the first die-cutting mechanism 120 and the second die-cutting mechanism 140 to separately cut the pole piece strip 20 and form the tabs, the dies of the first die-cutting mechanism 120 and the second die-cutting mechanism 140 can achieve uniform wear during use, which is beneficial to extending the service life of the die.

[0039] In addition, when the die of either the first die-cutting mechanism 120 or the second die-cutting mechanism 140 is severely worn, it can be replaced or repaired separately, and the other can be used normally. Further, since the die structures of the first die-cutting mechanism 120 and the second die-cutting mechanism 140 are simpler than the die structure of one-piece punching and can be repaired separately, the difficulty of die repair can be significantly reduced.

[0040] Specifically, in this embodiment, the second die-cutting mechanism 140 includes two relatively arranged second dies 141. The two side edges in the width direction of the pole piece strip 20 passing through the second die-cutting mechanism 140 can respectively pass through the two second dies 141, and the distance between the two second dies 141 is adjustable.

[0041] The second die 141 is similar in structure to the first die-cutting mechanism 120 and also includes an upper die and a lower die. The two second dies 141 can respectively perform die-cutting on the two edges in the width direction, thereby processing tabs and / or rounded corners on the two edges. Specifically, one second die 141 in this embodiment is used to process a rounded corner on one side edge of the pole piece strip 20, and the other second die 141 is used to process a rounded corner on the other side edge of the pole piece strip 20 and also process a tab. Moreover, by adjusting the distance between the two second dies 141, the length of the finally formed pole piece 21 can be controlled, thereby ensuring the accuracy of the length dimension of the pole piece 21.

[0042] Furthermore, in this embodiment, the first upper mold 122 includes a plurality of cutters 1221 arranged in parallel and at equal intervals. The first upper mold 122 is pressed downward to cut out a pole piece 21 between two adjacent cutters 1221 .

[0043] for example, Figure 1 The first upper mold 122 shown includes three cutters 1221, so the first upper mold 122 can cut two pole pieces 21 by pressing down once. The cutters 1221 extend along the width direction of the pole piece strip 20. When the first upper mold 122 is pressed down, multiple cuts extending along the width direction can be formed on the pole piece strip 20, and the pole piece 21 can be obtained between two adjacent cuts. The distance between two adjacent cuts (or the distance between two adjacent cutters 1221) is equal to the width of a single pole piece 21 cut. Since the spacing between two adjacent cutters 1221 is determined each time the first upper mold 122 is pressed down, the consistency of the width of the multiple pole pieces 21 cut can be ensured.

[0044] Furthermore, in this embodiment, the distance between the multiple cutters 1221 is adjustable. Therefore, by adjusting the spacing between the cutters 1221, the width of the final formed pole piece 21 can be controlled, thereby ensuring the accuracy of the width dimension of the pole piece 21. Moreover, when the spacing between the cutters 1221 is different, pole pieces 21 of different widths can be cut, so that the manufacturing device 100 is suitable for processing pole pieces 21 of different models.

[0045] The transfer mechanism 130 includes a discharge transfer assembly 131 and a discharge conveying assembly 132. The discharge transfer assembly 131 can grab the electrode piece 21 located in the first lower mold 121 in the interval between the lifting and pressing of the first upper mold 122, and transfer the multiple electrode pieces 21 obtained by pressing the first upper mold 122 once to the discharge conveying assembly 132. The discharge transfer assembly 131 can be a manipulator with a suction cup at the end, a multi-axis mobile platform or a multi-axis robot, etc., and the suction cup can absorb the electrode piece 21. The discharge conveying assembly 132 can be a vacuum belt, which can absorb the received electrode piece 21 and convey it downstream.

[0046] When the first upper mold 122 is lifted, it can avoid the discharge transfer assembly 131, so the discharge transfer assembly 131 can transfer the pole piece 21 on the first lower mold 121 to the discharge conveying assembly 132 in the gap between the lifting and pressing of the first upper mold 122. Therefore, the first lower mold 121 can keep its position fixed, and the first upper mold 122 can press down and lift up alternately at a preset frequency to cut the pole piece strip 20 into pole pieces 21 in sequence, thereby significantly improving the production cycle. Moreover, since the first upper mold 122 can cut multiple pole pieces 21 at a time, more pole pieces 21 can be produced per unit time.

[0047] In this embodiment, transfer mechanisms 130 are respectively arranged on two opposite sides of the first die-cutting mechanism 120, and the blanking transfer assemblies 131 of the two transfer mechanisms 130 on both sides can alternately grasp the pole pieces 21 located on the first lower die 121.

[0048] Since the first upper die 122 can cut multiple pole pieces 21 in one downward press, a single blanking transfer assembly 131 may not be able to take away multiple pole pieces 21 at one time in time, resulting in the need to extend the lifting time of the first upper die 122. By arranging transfer mechanisms 130 on both sides, the two blanking transfer assemblies 131 can act alternately, so as to quickly take away the pole pieces 21 on the first lower die 121, which helps to further improve the production beat of the pole pieces.

[0049] Alternatively, a single blanking transfer assembly 131 can grasp multiple pole pieces 21 at the same time. After one of the blanking transfer assemblies 131 moves the multiple pole pieces 21 obtained by one downward press of the first upper die 122 out of the first lower die 121, the first upper die 122 can perform the next downward press and obtain multiple pole pieces 21 without waiting for the blanking transfer assembly 131 to return. At this time, the multiple pole pieces 21 obtained by the next downward press can be transferred by the other blanking transfer assembly 131. In this way, it also helps to further improve the beat of the first die-cutting mechanism 120.

[0050] In addition, in this embodiment, the transfer mechanism 130 further includes a visual detection component 133, and the visual detection component 133 is used to obtain the image information of the pole pieces 21 on the blanking conveying assembly 132. The visual detection component 133 can adopt a CCD camera, which can be arranged above the blanking conveying assembly 132, and the pole pieces 21 conveyed by the blanking conveying assembly 132 can successively pass through the detection range of the visual detection component 133. By comparing the image information obtained by the visual detection component 133 with the reference information, it can be judged whether there are defects in the pole pieces 21.

[0051] Further, the transfer mechanism 130 further includes a variable pitch transfer component 134, a positioning platform 135 and a blanking transfer component 136. The variable pitch transfer component 134 is used to transfer the pole pieces 21 on the blanking conveying assembly 132 to the positioning platform 135 and increase the distance between adjacent two pole pieces 21, and the blanking transfer component 136 is used to grasp the pole pieces 21 on the positioning platform 135 and blank them.

[0052] A visual module (not marked in the figure) is arranged above the positioning platform 135, which can obtain the position information of the pole pieces 21 on the positioning platform 135, and the positioning platform 135 corrects the position of the pole pieces 21 according to the position information provided by the visual module to ensure that the blanking transfer component 136 can successfully grasp the pole pieces 21 on the positioning platform 135. Specifically, the positioning platform 135 can drive the carried pole pieces 21 to translate in at least two directions and rotate to achieve the purpose of deviation correction and positioning.

[0053] The variable-distance transfer assembly 134 can grab multiple pole pieces 21 at a time, and place the multiple pole pieces 21 on the positioning platform 135 after the distance between the pole pieces 21 is pulled apart. Generally, the number of pole pieces 21 grabbed by the variable-distance transfer assembly 134 at a time is equal to the number of pole pieces 21 obtained by each downward pressing of the first upper mold 122. By increasing the distance between two pole pieces 21, the edges of adjacent pole pieces 21 can be prevented from interfering with each other, thereby ensuring that the visual module above the positioning platform 135 can accurately obtain the position information of the pole pieces 21.

[0054] The material transfer component 136 may be a multi-axis robot, the end of which is equipped with a suction cup for sucking the pole piece 21. After grabbing the pole piece 21, the material transfer component 136 can drop the pole piece 21 to a specified position according to the detection structure of the visual detection component 133.

[0055] Furthermore, in this embodiment, the film making device 100 also includes a material unloading conveying mechanism 150 and an NG material box 160 , and the material unloading transfer component 136 can unload the electrode 21 grasped from the positioning platform 135 to the material unloading conveying mechanism 150 or the NG material box 160 .

[0056] The unloading conveying mechanism 150 may also use a vacuum belt, which can absorb the received electrode 21. Specifically, for the electrode 21 that has passed the inspection, the unloading transfer component 136 unloads it to the unloading conveying mechanism 150, and the unloading conveying mechanism 150 conveys it to the subsequent process. For the electrode 21 that has failed the inspection, the unloading transfer component 136 unloads it to the NG material box 160 for scrapping.

[0057] Obviously, in other embodiments, when the pole piece 21 does not need to be immediately involved in the next process, the material transfer component 136 can also discharge the pole piece 21 grabbed from the positioning platform 135 into the corresponding material box for storage according to different types.

[0058] In the above-mentioned sheet manufacturing device 100 and the slitting, folding and stacking integrated machine, the first upper die 122 can cut the pole piece strip 20 conveyed by the conveying mechanism 110 to the pole piece 21 between the first lower die 121 and the first upper die 122 by pressing down relative to the first lower die 121. During the interval when the first upper die 122 is lifted relative to the first lower die 121 and then pressed down, the discharging and transferring assembly 131 can transfer the pole piece 21 on the first lower die 121 out of the first die-cutting machine 120. When the first upper die 122 is lifted, it can avoid the discharging and transferring assembly 131. Therefore, the first lower die 121 can keep its position fixed. By alternately pressing down and lifting the first upper die 122 at a preset frequency, the pole piece strip 20 can be successively cut into pole pieces 21, thus significantly improving the sheet manufacturing beat. Moreover, multiple pole pieces 21 can be obtained by one pressing down of the first upper die 122. Therefore, the sheet manufacturing efficiency of the above-mentioned sheet manufacturing device 100 and the slitting, folding and stacking integrated machine is significantly improved.

[0059] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0060] The above-described embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the utility model patent shall be subject to the appended claims.

Claims

1. A film production device, characterized in that, Comprising: A conveying mechanism for conveying a pole piece strip; A first die-cutting mechanism, including a first lower die and a first upper die, the first upper die being capable of lifting and pressing down relative to the first lower die, and the pole piece strip being capable of entering between the first lower die and the first upper die under the conveyance of the conveying mechanism, and each time the first upper die presses down, the pole piece strip can be cut into a plurality of pole pieces; And A transfer mechanism, including a discharge transfer assembly, the discharge transfer assembly being capable of grasping the pole pieces located in the first lower die at intervals between the lifting and pressing down of the first upper die, and removing the plurality of pole pieces obtained by one-time pressing down of the first upper die.

2. The film production device according to claim 1, wherein It further includes a second die-cutting mechanism, the second die-cutting mechanism being arranged upstream of the conveying mechanism, the pole piece strip being capable of passing through the second die-cutting mechanism under the traction of the conveying mechanism, the second die-cutting mechanism being capable of processing pole ears and rounded corners on the edges of the pole piece strip, and the first upper die pressing down being capable of cutting off the pole piece strip to obtain pole pieces.

3. The film production device according to claim 2, characterized in that, The second die-cutting mechanism includes two relatively arranged second dies, and both sides of the pole piece strip in the width direction passing through the second die-cutting mechanism can respectively pass through the two second dies, and the distance between the two second dies is adjustable.

4. The film production device according to claim 2, wherein The first upper die includes a plurality of parallel and equally spaced cutting knives, and when the first upper die presses down, a pole piece can be cut out between adjacent two of the cutting knives.

5. The film production device according to claim 4, characterized in that, The distance between the plurality of cutting knives is adjustable.

6. The film production device according to claim 1, characterized in that, The surface of the first lower die is provided with adsorption holes communicated with a negative pressure cavity.

7. The film production device according to claim 1, characterized in that, The transfer mechanism further includes a discharge conveying assembly, and the discharge transfer assembly is capable of transferring the pole pieces located in the first lower die to the discharge conveying assembly.

8. The film production device according to claim 7, characterized in that, The transfer mechanism further includes a visual detection assembly for acquiring image information of the pole pieces on the discharge conveying assembly.

9. The film production device according to claim 7, characterized in that, The transfer mechanism further includes a pitch-changing transfer assembly, a positioning platform and a blanking transfer assembly, the pitch-changing transfer assembly being used for transferring the pole pieces on the discharge conveying assembly to the positioning platform and increasing the pitch between adjacent two pole pieces, and the blanking transfer assembly being used for grasping the pole pieces on the positioning platform and blanking.

10. The film production device according to claim 9, characterized in that, It further includes a blanking conveying mechanism and an NG bin, and the blanking transfer assembly is capable of blanking the pole pieces grabbed from the positioning platform to the blanking conveying mechanism or the NG bin.

11. The film production device according to claim 1, characterized in that, The transfer mechanisms are respectively arranged on opposite sides of the first die-cutting mechanism, and the discharge transfer assemblies of the transfer mechanisms on both sides can alternately grasp the pole pieces located in the first lower die.

12. A cutting and folding integrated machine, characterized in that, Including the sheet-making device according to any one of claims 1 to 11 above.

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