Rolling composite device and thermal composite lamination machine
By setting spaced protrusions or grooves on the rolling roller, the problem of decreased diaphragm conductivity caused by traditional rolling rollers is solved, thereby improving the discharge capacity and cycle performance of lithium batteries.
Patent Information
- Application Number
- CN202520177610.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-27
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-01-27
AI Technical Summary
When traditional rollers are used to roll the separator in lithium battery production, the conductivity of the separator to lithium ions decreases, affecting the battery's discharge capacity and cycle performance.
By setting multiple spaced protrusions or grooves on the rolling roller, the contact area between the rolling roller and the diaphragm is reduced, ensuring the stability of the diaphragm's conductivity for lithium ions.
By reducing the contact area between the rolling roller and the separator, the discharge capacity and cycle performance of the lithium battery are improved, and the conductivity of the separator to lithium ions is kept stable.
Smart Images
Figure CN223956604U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to battery preparation technical field, specifically, relate to a kind of rolling compound device and hot compound lamination machine. BACKGROUND
[0002] In new energy automobile power battery industry, high-speed lamination process has developed into a trend in new energy power battery industry, and power battery enters the "laminated era" of 3.0. Compared with winding battery, laminated battery has many advantages such as large capacity, high safety and long service life. However, due to the limitations of technology, process, efficiency and other aspects, laminated battery still faces many problems in the production process.
[0003] For example, in the process of lithium battery production, it is first cut by positive and negative electrode sheet, and three materials are compounded by rolling and hot compounding. Usually, after the negative material is cut and covered by the diaphragm, it needs to be rolled and compounded. After the electrode sheet is cut by the traditional rolling roller assembly, the positive electrode sheet is covered by the diaphragm, and the diaphragm is covered by the negative electrode sheet, and then it is sent to the positive rolling roller for rolling and compounding. Therefore, due to the need of process, the electrode sheet covered by the diaphragm is rolled and compounded, and the traditional rolling roller is usually a smooth roller. When the smooth roller rolls the diaphragm covered electrode sheet, the contact area is large, which can reduce the conductivity of lithium ions of the diaphragm, thereby reducing the discharge capacity, discharge performance and cycle performance of the battery. UTILITY MODEL CONTENTS
[0004] The utility model aims at providing a kind of rolling compound device and hot compound lamination machine, can reduce the contact area of perimeter surface, ensure the conductivity stability of lithium ions of diaphragm, thereby guarantee the discharge capacity, discharge performance and cycle performance of battery.
[0005] The embodiment of the utility model is realized as follows:
[0006] In the first aspect, the utility model embodiment provides a kind of rolling compound device, comprising:
[0007] support frame;
[0008] first rolling roller, the first rolling roller is rotatably arranged on the support frame;
[0009] second rolling roller, the second rolling roller is rotatably arranged on the support frame, and is oppositely arranged with the first rolling roller;
[0010] Wherein, the first rolling roller and the second rolling roller form rolling channel for diaphragm and electrode sheet, and are used for rolling and compounding the diaphragm and the electrode sheet, and the perimeter surface of at least one of the first rolling roller and the second rolling roller is distributed with a plurality of interval arranged convex hull or groove.
[0011] In an optional embodiment, the first rolling roller is a smooth roller, and the circumferential surface of the second rolling roller is provided with a plurality of arrayed protrusions, and a separation groove is formed between adjacent protrusions, wherein the top surface of the protrusion is configured to abut against the surface of the diaphragm or the pole piece.
[0012] In an optional embodiment, the sum of the top surface areas of the plurality of protrusions on the second rolling roller is 5%-60% of the circumferential surface area of the second rolling roller.
[0013] In an optional embodiment, the top surface area of each protrusion on the second rolling roller is between 0.01-0.4mm 2 .
[0014] In an optional embodiment, the circumferential surface of the first rolling roller and the second rolling roller is respectively provided with a plurality of arrayed protrusions, and a separation groove is formed between adjacent protrusions, wherein the top surface of the protrusion is configured to abut against the surface of the diaphragm or the pole piece.
[0015] In an optional embodiment, the sum of the top surface areas of the plurality of protrusions on the first rolling roller and the second rolling roller is 5%-60% of the circumferential surface area of the first rolling roller and the second rolling roller.
[0016] In an optional embodiment, the top surface area of each protrusion on the first rolling roller and the second rolling roller is between 0.01-0.4mm 2 .
[0017] In an optional embodiment, the top surface of each protrusion is circular, rectangular, or diamond-shaped.
[0018] In an optional embodiment, the support frame is further provided with a driving member, the driving member is in transmission connection with the first rolling roller, and is configured to drive the first rolling roller to move closer to or away from the second rolling roller.
[0019] In a second aspect, the utility model embodiment provides a kind of hot composite lamination machine, including cutting mechanism and the aforementioned rolling composite device, and rolling composite device includes support frame, first rolling roller and second rolling roller, and the first rolling roller is rotatably arranged on the support frame;The second rolling roller is rotatably arranged on the support frame, and is oppositely arranged with the first rolling roller;Wherein, the first rolling roller and the second rolling roller form the rolling channel for diaphragm and pole piece to pass between, and are used to roll and composite the diaphragm and the pole piece, and the circumferential surface of at least one of the first rolling roller and the second rolling roller is distributed with a plurality of interval arranged protrusions or grooves.The cutting mechanism is configured to cut pole piece, and the rolling composite device is arranged at the discharging side of the cutting mechanism.
[0020] The embodiment of the utility model has the advantages that:
[0021] The heat compound lamination machine provided by the embodiment of the utility model has the first rolling roller and the second rolling roller rotatably arranged on the support frame, and a rolling channel for the diaphragm and the pole piece to pass through is formed between the first rolling roller and the second rolling roller, and the first rolling roller and the second rolling roller can roll and compound the diaphragm and the pole piece from the upper side and the lower side, wherein the peripheral surface of at least one of the first rolling roller and the second rolling roller is distributed with a plurality of convex blocks or grooves arranged at intervals. In actual rolling and compounding, the first rolling roller and the second rolling roller roll and compound the diaphragm and the pole piece from the upper side and the lower side respectively, and since the peripheral surface of at least one of the first rolling roller and the second rolling roller is distributed with a plurality of convex blocks or grooves arranged at intervals, the peripheral surface of the at least one rolling roller is not a smooth roller, and there is a certain rolling gap, so that the contact area of the peripheral surface is reduced. Compared with the prior art, the rolling and compounding device provided by the embodiment of the utility model can reduce the peripheral surface contact area, reduce the compounding pressure, reduce the compounding short-circuit rate, ensure the stability of the diaphragm to the lithium ion conductivity, and thus ensure the discharge capacity, discharge performance and cycle performance of the battery. BRIEF DESCRIPTION OF DRAWINGS
[0022] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment, and it should be understood that the following drawings only show some embodiments of the utility model, and should not be regarded as the limitation to the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.
[0023] Figure 1 The structure diagram of the rolling and compounding device provided by the embodiment of the utility model is shown in the figure.
[0024] Figure 2 The principle diagram of the rolling and compounding device provided by the embodiment of the utility model is shown in the figure.
[0025] Figure 3 The structure diagram of the second rolling roller in the embodiment of the utility model is shown in the figure. Figure 1
[0026] The structure diagram of the second rolling roller in the embodiment of the utility model is shown in the figure. Figure 4 Figure 3 The structure diagram of another rolling and compounding device provided by the embodiment of the utility model is shown in the figure.
[0027] Figure 5 The structure diagram of another second rolling roller provided by the embodiment of the utility model is shown in the figure.
[0028] Figure 6 The structure diagram of another second rolling roller provided by the embodiment of the utility model is shown in the figure.
[0029] Figure 7 For Figure 6 Cross-sectional view of the second roller.
[0030] Icon:
[0031] 100 - roller compounding device; 110 - support frame; 111 - driving member; 113 - driving motor; 130 - first roller; 131 - first rotation shaft; 150 - second roller; 170 - convex bump; 171 - separation groove; 190 - concave groove; 191 - separation convex; 200 - diaphragm; 300 - pole piece. DETAILED DESCRIPTION
[0032] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.
[0033] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present application.
[0034] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.
[0035] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, or the orientations or positional relationships commonly placed when the product of the present application is used, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third", etc. are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.
[0036] Moreover, the terms "horizontal," "vertical," and the like set forth herein are used with the intent that the components so described can be oriented in any direction of space. Stated differently, the terms "horizontal" and "vertical" are used herein as shorthand notations to more particularly set forth certain orientations (e.g., relative to gravity).
[0037] In the description of the present application, it should be explained that, unless otherwise explicitly specified and limited, the terms "arrange", "mount", "connect", "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0038] As disclosed in the background art, the current high-speed lamination process has developed into a trend in the new energy power battery industry. The lamination process is to cut the positive and negative electrode sheets first, and then to composite the three materials by rolling and hot compounding. Usually, after the negative material is cut and covered by the diaphragm, it needs to be rolled and compounded. After the traditional rolling roller assembly cuts the electrode sheet, the positive electrode sheet is covered with the diaphragm, the diaphragm is covered with the negative electrode sheet, and then it is sent to the positive rolling roller for rolling and compounding. The upper and lower rolling rollers of the positive rolling roller are smooth rolling rollers. Since the smooth roller rolls the diaphragm, the conductivity of the diaphragm to lithium ions will be weakened, thereby reducing the discharge capacity of the battery and the like.
[0039] And the inventor found that as long as the area of the upper and lower rolling rollers in contact with the diaphragm / electrode sheet is less than a certain range, the diaphragm can attract lithium ions, thereby ensuring stable conductivity. Therefore, the present application provides a novel rolling and compounding device and a hot compounding lamination machine, which can effectively solve the technical problems caused by the existing double smooth roller rolling and compounding.
[0040] Referring to Figure 1 and Figure 2 The present application provides a rolling and compounding device 100 and a hot compounding lamination machine, which can reduce the surface contact area, ensure the stable conductivity of the diaphragm 200 to lithium ions, and thereby ensure the discharge capacity, discharge performance and cycle performance of the battery.
[0041] The roller compounding device 100 provided by the embodiment of the utility model, including support frame 110, first roller compounding roller 130 and second roller compounding roller 150, first roller compounding roller 130 rotatably arranged on support frame 110, second roller compounding roller 150 rotatably arranged on support frame 110 and oppositely arranged with first roller compounding roller 130, wherein, first roller compounding roller 130 and second roller compounding roller 150 form roller compounding channel for diaphragm 200 and pole piece 300 and be used for roller compounding diaphragm 200 and pole piece 300, and the periphery of at least one of first roller compounding roller 130 and second roller compounding roller 150 is distributed with multiple interval arranged convex 170 or groove 190.
[0042] It should be noted that first roller compounding roller 130 and second roller compounding roller 150 are distributed on support frame 110, and the two ends of first roller compounding roller 130 are provided with first rotating shaft 131, and the two ends of second roller compounding roller 150 are provided with second rotating shaft, and first rotating shaft 131 and second rotating shaft are rotatably arranged on support frame 110, and support frame 110 is installed on the big board, wherein first roller compounding roller 130 is arranged above second roller compounding roller 150, so that first roller compounding roller 130 and second roller compounding roller 150 can be roller compounded from the upper and lower sides of diaphragm 200 and pole piece 300. Wherein, the coating form of diaphragm 200 and pole piece 300 can refer to the existing lamination technology, and will not be introduced here.
[0043] In actual roller compounding, first roller compounding roller 130 and second roller compounding roller 150 are roller compounded from the upper and lower sides of diaphragm 200 and pole piece 300, and since the periphery of at least one of first roller compounding roller 130 and second roller compounding roller 150 is distributed with multiple interval arranged convex 170 or groove 190, the periphery of at least one roller is not a smooth roller, and there is a certain roller gap, so as to reduce the contact area of the periphery, ensure the stability of the conductivity of diaphragm 200 to lithium ions, and ensure the discharge capacity, discharge performance and cycle performance of the battery. It should be noted that although the contact area is reduced in the embodiment, the whole is still in a face-to-face contact state during roller pressing, and diaphragm 200 or pole piece 300 will not be damaged or deformed.
[0044] Referring to Figure 3 And Figure 4In some embodiments, the first rolling roller 130 is a smooth roller, and the circumferential surface of the second rolling roller 150 is provided with a plurality of arrayed protrusions 170, and a separation groove 171 is formed between adjacent protrusions 170, wherein the top surface of the protrusion 170 is configured to abut the surface of the diaphragm 200 or the pole piece 300. Specifically, the plurality of protrusions 170 are uniformly distributed on the circumferential surface of the second rolling roller 150, so that the second rolling roller 150 forms a spot roller structure. And a separation groove 171 is formed between every two adjacent protrusions 170, which extends a short distance towards the center of the second rolling roller 150, so that when the second rolling roller 150 and the first rolling roller 130 are rolled together, the top surface of the protrusion 170 abuts the surface of the diaphragm 200 and the pole piece 300, and the separation groove 171 exposes part of the surface of the diaphragm 200 and the pole piece 300, thereby reducing the overall contact area.
[0045] Of course, in other preferred embodiments of the present application, the second rolling roller 150 can also be provided as a smooth roller, and the first rolling roller 130 is a spot roller structure. Alternatively, in other preferred embodiments, both the first rolling roller 130 and the second rolling roller 150 are spot roller structures.
[0046] It should be noted that in the present embodiment, the plurality of protrusions 170 are arrayed to form a spot roller structure. In other preferred embodiments of the present application, the plurality of protrusions 170 can also be arranged in a parallel strip structure, which can also form a separation groove 171 to reduce the contact area.
[0047] It is worth noting that in the present embodiment, the smooth roller and the spot roller are combined to achieve rolling compounding, so that the contact area is more controllable, and the electrical conductivity can be further ensured.
[0048] In some embodiments, the top surface of each protrusion 170 is circular, rectangular or rhombic, preferably the top surface of each protrusion 170 is circular, and each protrusion 170 is cylindrical. The top surface of the protrusion 170 refers to the side surface of the protrusion 170 away from the center of the second rolling roller 150. By using a cylindrical protrusion 170, the manufacturing process is less difficult, the production cost is reduced, and the sharp corners or edges are avoided, thereby avoiding damage to the diaphragm 200 or the pole piece 300 during rolling compounding.
[0049] In some embodiments, the sum of the top surface areas of the plurality of protrusions 170 on the second rolling roller 150 is 5%-60% of the circumferential surface area of the second rolling roller 150. By reasonably setting the area ratio of the plurality of protrusions 170, the protrusion area of the roller surface can be effectively controlled within a certain range, so that the diaphragm 200 can attract lithium ions, thereby further ensuring the electrical conductivity.
[0050] In some embodiments, the top surface area of each convex bump 170 on the second rolling roller 150 is between 0.01-0.4mm 2 In particular, the top surface of each convex bump 170 is circular, and the top surface area of each convex bump 170 is preferably 0.2mm 2 While ensuring the reduction of the contact area, the convex bump 170 can avoid damaging the diaphragm 200 or the pole piece 300 due to being too small.
[0051] In some embodiments, the support frame 110 is further provided with a driving member 111, which is in transmission connection with the first rolling roller 130 and is configured to drive the first rolling roller 130 to approach or move away from the second rolling roller 150. In particular, the driving member 111 is a pneumatic cylinder, which can drive the first rolling roller 130 to approach or move away from the second rolling roller 150. Meanwhile, the first rolling roller 130 and / or the second rolling roller 150 can be further provided with a driving motor 113, which is used to realize self-rotation. Preferably, the driving motor 113 can be arranged at one end of the first rolling roller 130 to realize the driving. Of course, the rotation structure and principle of the first rolling roller 130 and the second rolling roller 150 can refer to the existing rolling roller structure.
[0052] Referring to Figure 5 In other preferable embodiments of the utility model, the circumferential surface of the first rolling roller 130 and the second rolling roller 150 is respectively provided with a plurality of arrayed convex bumps 170, and a separation groove 171 is formed between adjacent convex bumps 170, wherein the top surface of the convex bump 170 is configured to abut against the surface of the diaphragm 200 and the pole piece 300.
[0053] In particular, the sum of the top surface areas of the plurality of convex bumps 170 on the first rolling roller 130 and the second rolling roller 150 is 5%-60% of the circumferential surface area of the first rolling roller 130 and the second rolling roller 150.
[0054] Further, the top surface area of each convex bump 170 on the first rolling roller 130 and the second rolling roller 150 is between 0.01-0.4mm 2 Meanwhile, the top surface of each convex bump 170 is circular, rectangular or rhombic.
[0055] It should be noted that the depth of the separation groove 171 between the convex bumps 170 in the embodiment is between 20-30μm.
[0056] Referring to Figure 6 and Figure 7In other preferable embodiments of the present application, the first rolling roller 130 is a smooth roller, and the circumferential surface of the second rolling roller 150 is provided with a plurality of arrayed grooves 190, and a separation protrusion 191 is formed between adjacent grooves 190, wherein the surface of the separation protrusion 191 is configured to abut against the surface of the diaphragm 200 or the pole piece 300. Specifically, the plurality of grooves 190 are uniformly distributed on the circumferential surface of the second rolling roller 150, so that the second rolling roller 150 also forms a spot roller structure. Moreover, each groove 190 is recessed towards the center of the second rolling roller 150, and a separation protrusion 191 is formed between each two adjacent grooves 190, so that when the second rolling roller 150 and the first rolling roller 130 are rolled together, the separation protrusion 191 can abut against the surface of the diaphragm 200 and the pole piece 300, and the groove 190 can expose part of the surface of the diaphragm 200 and the pole piece 300, thereby reducing the overall contact area.
[0057] It should be noted that the plurality of grooves 190 are arrayed in the present embodiment, thereby forming a spot roller structure. However, in other preferable embodiments of the present application, the plurality of grooves 190 can also be arranged in parallel in a strip structure, which can also form a separation protrusion 191 and reduce the contact area.
[0058] In some embodiments, each groove 190 is a circular groove, a rectangular groove or a rhombic groove, and preferably, each groove 190 is a circular groove. Specifically, the groove 190 is a circular groove, which means that the opening shape and the bottom wall shape of the groove 190 are both circular. By using a circular groove 190, the manufacturing process can be relatively simple, the production cost can be reduced, and the damage to the diaphragm 200 or the pole piece 300 during the rolling process can be avoided.
[0059] In some embodiments, the sum of the groove areas of the plurality of grooves 190 is 10%-60% of the surface area of the circumferential surface of the second rolling roller 150. Preferably, the sum of the groove areas of the plurality of grooves 190 is 50% of the surface area of the circumferential surface of the second rolling roller 150. Here, the groove area refers to the opening range of the groove 190, which can represent the area of the groove 190. By reasonably setting the area ratio of the plurality of grooves 190, the protrusion area of the roller surface can be effectively controlled within a specific range, so that the diaphragm 200 can attract lithium ions, thereby further ensuring the conductivity.
[0060] In some embodiments, the groove area of each groove 190 is 0.01-0.4mm 2 between. Specifically, each groove 190 is a circular groove, and the groove area of each groove 190 is preferably 0.2mm 2 While reducing the contact area, the separation protrusion can also avoid damaging the diaphragm 200 or the pole piece 300.
[0061] The utility model embodiment further provides a kind of hot compound lamination machine, including cutting mechanism and the aforementioned rolling compound device 100, rolling compound device 100 includes support frame 110, first rolling roller 130 and second rolling roller 150, first rolling roller 130 is rotatably arranged on support frame 110;Second rolling roller 150 is rotatably arranged on support frame 110, and it is oppositely arranged with first rolling roller 130;Wherein, first rolling roller 130 and second rolling roller 150 between it is formed with the rolling channel for diaphragm 200 and pole piece 300 pass through, and it is used for rolling compound diaphragm 200 and pole piece 300, and the periphery of at least one of first rolling roller 130 and second rolling roller 150 is distributed with multiple spot-shaped interval arrangement's convex 170 or groove 190.Cutting mechanism is configured as cutting pole piece 300, and rolling compound device 100 is set in the discharging side of cutting mechanism.
[0062] It needs to be explained that, the basic structure and working principle of hot compound lamination machine here can refer to the lamination machine in prior art.In actual operation, pole piece 300 is cut after being cut by cutting mechanism, and is sent into the rolling channel formed by first rolling roller 130 and second rolling roller 150 with diaphragm 200, to realize the rolling compound of diaphragm 200 and pole piece 300 by first rolling roller 130 and second rolling roller 150.
[0063] As described above, the rolling compound device 100 and hot compound lamination machine provided by the utility model embodiment, first rolling roller 130 and second rolling roller 150 are rotatably arranged on support frame 110, and the rolling channel for diaphragm 200 and pole piece 300 pass through is formed between first rolling roller 130 and second rolling roller 150, and first rolling roller 130 and second rolling roller 150 can roll compound diaphragm 200 and pole piece 300 from upper and lower sides, wherein the periphery of at least one of first rolling roller 130 and second rolling roller 150 is distributed with multiple interval arrangement's convex 170 or groove 190.In actual rolling compound, first rolling roller 130 and second rolling roller 150 are rolled compound diaphragm 200 and pole piece 300 from upper and lower sides respectively, and since the periphery of at least one of first rolling roller 130 and second rolling roller 150 is distributed with multiple interval arrangement's convex 170 or groove 190, the periphery of at least one rolling roller is not smooth roll, and there is certain roll gap, to reduce the contact area of periphery.Compared with prior art, the rolling compound device 100 provided by the utility model embodiment can reduce the contact area of periphery, reduce compound pressure, reduce compound short-circuit rate, ensure the conductivity stability of diaphragm 200 to lithium ion, to ensure the discharge capacity, discharge performance and cycle performance of battery.
[0064] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A roller compaction apparatus, characterized by, The application relates to a rolling and laminating device, comprising: a support frame; a first rolling roller rotatably arranged on the support frame; a second rolling roller rotatably arranged on the support frame and opposite to the first rolling roller; wherein a rolling channel for passing a diaphragm and a pole piece is formed between the first rolling roller and the second rolling roller, and the rolling channel is used for rolling and laminating the diaphragm and the pole piece, and a plurality of convexes or grooves are arranged on the circumferential surface of at least one of the first rolling roller and the second rolling roller.
2. The roller compaction apparatus of claim 1, wherein, The first rolling roller is a smooth roller, the circumferential surface of the second rolling roller is provided with a plurality of arrayed convexes, and a separation groove is formed between adjacent convexes, wherein the top surface of the convex is configured to abut against the surface of the diaphragm or the pole piece.
3. The roll compounding device of claim 2, wherein The sum of the top surface areas of the plurality of convexes on the second rolling roller is 5%-60% of the circumferential surface area of the second rolling roller.
4. The roll compounding device of claim 3, wherein the top surface area of each of the convexities on the second roller is between 0.01-0.4 mm 2 .
5. The roll compounding device of claim 1, wherein The circumferential surface of the first rolling roller and the second rolling roller is respectively provided with a plurality of arrayed convexes, and a separation groove is formed between adjacent convexes, wherein the top surface of the convex is configured to abut against the surface of the diaphragm or the pole piece.
6. The roll compounding device of claim 5, wherein The sum of the top surface areas of the plurality of convexes on the first rolling roller and the second rolling roller is 5%-60% of the circumferential surface area of the first rolling roller and the second rolling roller.
7. The roll compounding device of claim 5, wherein the top surface area of each of the convexities on the first and second roller compaction rollers is between 0.01-0.4mm 2 .
8. The roll compounding device of claim 1, wherein The top surface of each convex is circular, rectangular or rhombic.
9. The roll compounding device of claim 1, wherein The support frame is further provided with a driving member, the driving member is in transmission connection with the first rolling roller, and is configured to drive the first rolling roller to approach or move away from the second rolling roller.
10. A hot compounding lamination machine characterized by, The application relates to a rolling and laminating device, comprising: a cutting mechanism configured to cut a pole piece, and the rolling and laminating device is arranged on the discharging side of the cutting mechanism.