Electrode rolling machining equipment

Abstract

The utility model relates to the technical field of electrode plate manufacturing, and provides electrode rolling processing equipment, which is used for rolling forming of an electrode diaphragm and comprises two composite rollers, a first roller, a second roller and a third roller, a composite gap is formed between the two composite rollers, and the two composite rollers are used for rolling composite forming of the electrode diaphragm; the number of the re-pressing rollers is two, the re-pressing rollers are located below the two composite rollers, a pressing gap is formed between the two re-pressing rollers, and the width of the pressing gap is smaller than that of the composite gap. According to the technical scheme, the problems that in the prior art, a traditional compounding machine usually does not carry out further rolling operation after compounding, the thickness of an electrode plate possibly exceeds the specification requirement, and the energy density and the cycle life of a battery are affected are solved.

Description

Technical Field

[0001] This utility model relates to the field of electrode sheet manufacturing technology, specifically to an electrode rolling processing equipment. Background Technology

[0002] Traditional electrode processing equipment, such as ten-roll or six-roll laminating machines, plays a crucial role in the lithium-ion battery manufacturing process. These machines are mainly used to laminate electrode active materials (positive or negative electrode) with current collectors (usually copper or aluminum foil) to form electrode films.

[0003] However, existing equipment and technologies have some limitations and shortcomings that may affect the quality and performance of the electrode sheets. During the lamination process, the adhesion between the active material and the current collector may be insufficient, leading to delamination of the electrode sheets in subsequent processing steps. Uneven pressure distribution during lamination may result in insufficient bonding strength in localized areas. Traditional laminating machines typically do not perform further rolling operations after lamination, meaning the thickness of the electrode sheets depends primarily on the initial settings during the lamination process. This may result in electrode sheet thickness exceeding specifications, affecting the battery's energy density and cycle life. Utility Model Content

[0004] This invention proposes an electrode rolling processing equipment, which solves the problem that traditional composite machines in related technologies usually do not perform further rolling operations after composite, which may lead to the electrode sheet thickness exceeding the specification requirements, affecting the energy density and cycle life of the battery.

[0005] The technical solution of this utility model is as follows: An electrode rolling processing equipment for rolling forming of electrode films, comprising:

[0006] The composite roller has two components, with a composite gap formed between the two composite rollers. The two composite rollers are used to roll-press and composite the electrode film.

[0007] The compound pressure roller has two rollers located below the two composite rollers, and there is a pressing gap between the two compound pressure rollers. The width of the pressing gap is smaller than the width of the composite gap.

[0008] Optionally, it also includes:

[0009] A forming roller is arranged adjacent to the composite roller, and a transfer gap is formed between the forming roller and the composite roller. The width of the transfer gap is greater than the width of the composite gap. The transfer gap is configured such that the electrode film is pressed when it passes through the transfer gap and its thickness remains unchanged after passing through.

[0010] Optionally, the forming rollers are at least two, arranged adjacent to each other and forming a pressing gap between them. The width of the pressing gap is greater than the width of the transfer gap. The pressing gap is configured such that the electrode film is pressed and becomes thinner after passing through the pressing gap.

[0011] Optionally, it also includes:

[0012] machine tool;

[0013] The bearing housing has multiple bearing housings and is movably arranged on the machine tool. The bearing housing has several abutting inclined surfaces, which are arranged on the side of the bearing housing along the moving direction of the bearing housing. The composite roller and the forming roller are respectively rotatably arranged on different bearing housings.

[0014] A fastener is movably mounted on the machine tool, and after being moved, it abuts against the inclined surface.

[0015] Optionally, it also includes:

[0016] A wedge, wherein the wedge is disposed on one side of the bearing housing;

[0017] An adjusting wedge is provided, which is raised and lowered on the machine tool and slides against the inclined surface of the wedge iron of the adjacent bearing seat.

[0018] Optionally, it also includes:

[0019] The guide block is disposed on one side of the bearing seat, and there are two guide blocks. The two guide blocks are spaced apart and form a guide space between the two guide blocks. The adjusting inclined block is raised and lowered within the guide space.

[0020] Optionally, the adjusting wedge has a threaded groove, the machine tool has a plurality of strip-shaped fixing holes, and further includes:

[0021] A screw, which passes through one of the strip-shaped fixing holes and is threadedly connected to the threaded groove;

[0022] A rotation drive component is movably mounted on the machine tool to drive the screw to rotate.

[0023] Optionally, the diameter of the strip-shaped fixing hole is larger than the diameter of the screw.

[0024] Optionally, the bearing housing has a mounting groove and further includes:

[0025] A heating ring is disposed within the mounting groove for heating the bearing housing.

[0026] Optionally, the mounting groove is arranged around the periphery of the bearing housing.

[0027] The working principle and beneficial effects of this utility model are as follows:

[0028] In this invention, a composite gap is formed between two composite rollers, which is used for the initial composite of the electrode active material and the current collector. The design of the composite rollers takes into account surface texture and material to ensure good adhesion between the active material and the current collector. By precisely controlling the size of the composite gap, the uniform distribution of the active material on the current collector can be effectively guaranteed, thereby avoiding delamination. Two additional pressing rollers are arranged below the composite rollers, with a narrower pressing gap between them. The width of the pressing gap is smaller than the width of the composite gap, which allows for further pressure on the electrode film after the initial composite, further enhancing the adhesion between the active material and the current collector. The use of the additional pressing rollers helps improve the thickness uniformity and surface flatness of the electrode film, thereby ensuring the energy density and cycle life of the battery.

[0029] The combined action of the composite roller and the re-pressing roller enhances the adhesion between the active material and the current collector, reducing the risk of electrode delamination. The application of the re-pressing roller allows for more precise control over the final thickness of the electrode film, ensuring the product meets stringent specifications and improving overall battery performance. The re-pressing roller further smooths the electrode film surface, reducing micro-defects and thus improving the overall quality of the electrode film. Through two rolling processes, the mechanical properties of the electrode film are significantly improved, which helps enhance the stability and reliability of the battery under various environmental conditions. Attached Figure Description

[0030] The preferred embodiments will be described below in a clear and easy-to-understand manner, in conjunction with the accompanying drawings, to further explain the above-mentioned characteristics, technical features, advantages and implementation methods of this utility model.

[0031] Figure 1 This is a schematic diagram of the structure of this utility model;

[0032] Figure 2 This is a partial structural diagram of the present utility model.

[0033] In the diagram: 1. Composite roller; 101. Composite gap; 2. Pressing roller; 201. Pressing gap; 3. Forming roller; 4. Transfer gap; 5. Machine tool; 501. Strip-shaped fixing hole; 6. Bearing seat; 601. Abutting inclined surface; 602. Mounting groove; 7. Fastener; 8. Wedge; 9. Adjusting inclined block; 10. Guide block; 11. Screw; 12. Rotation drive component; 13. Heating ring. Detailed Implementation

[0034] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0035] To keep the drawings concise, only the parts relevant to the utility model are shown schematically in each drawing; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0036] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0038] Reference Figures 1-2 An electrode roll forming equipment is proposed for roll forming of electrode films, comprising: a composite roller 1, having two composite rollers 1 with a composite gap 101 between them, the two composite rollers 1 being used to roll and form the electrode films; and a secondary pressing roller 2, having two secondary pressing rollers 2 located below the two composite rollers 1, with a pressing gap 201 between them, the width of the pressing gap 201 being smaller than the width of the composite gap 101.

[0039] In this embodiment, a composite gap 101 is formed between the two composite rollers 1, which is used for the initial composite of the electrode active material and the current collector. The design of the composite rollers 1 takes into account surface texture and material to ensure good adhesion between the active material and the current collector. By precisely controlling the size of the composite gap 101, the uniform distribution of the active material on the current collector can be effectively guaranteed, thereby avoiding delamination. Two repressing rollers 2 are arranged below the composite rollers 1, with a narrower pressing gap 201 between them. The width of the pressing gap 201 is smaller than the width of the composite gap 101, which allows for further pressing of the electrode film on the basis of the initial composite, further enhancing the adhesion between the active material and the current collector. The use of the repressing rollers 2 helps to improve the thickness uniformity and surface flatness of the electrode film, thereby ensuring the energy density and cycle life of the battery.

[0040] The combined action of composite roller 1 and re-pressing roller 2 enhances the adhesion between the active material and the current collector, reducing the risk of electrode delamination. The application of re-pressing roller 2 allows for more precise control of the final electrode film thickness, ensuring the product meets stringent specifications and improving overall battery performance. Re-pressing roller 2 further smooths the electrode film surface, reducing micro-defects and thus improving the overall quality of the electrode film. Through two rolling processes, the mechanical properties of the electrode film are significantly improved, which helps enhance the stability and reliability of the battery under various environmental conditions.

[0041] Furthermore, it also includes: a forming roller 3, of which there are at least two forming rollers 3 arranged adjacent to each other, forming a pressing gap 201 between them; the forming roller 3 and the composite roller 1 arranged adjacent to each other, forming a transfer gap 4 between the forming roller 3 and the composite roller 1; the width of the transfer gap 4 is greater than the width of the composite gap 101; the width of the pressing gap 201 is greater than the width of the transfer gap 4; the pressing gap 201 is configured such that the electrode film is pressed when passing through the pressing gap 201 and its thickness becomes thinner after passing through it; the transfer gap 4 is configured such that the electrode film is pressed when passing through the transfer gap 4 and its thickness remains unchanged after passing through it; the electrode film passes through the pressing gap 201, the transfer gap 4 and the composite gap 101 in sequence.

[0042] In this embodiment, the pressing gap 201 can further adjust the thickness of the electrode diaphragm to ensure it meets the final specifications. The electrode diaphragm first undergoes initial thickness adjustment through the pressing gap 201, then undergoes slight flattening while maintaining the thickness through the transfer gap 4, and finally completes the lamination process through the composite gap 101. The electrode diaphragm first passes through the pressing gap 201, becoming thinner; then it passes through the transfer gap 4, where the thickness remains essentially unchanged, but the surface quality is improved; finally, the lamination process is completed through the composite gap 101. The final thickness of the electrode diaphragm can be adjusted very precisely to meet the processing requirements of electrode diaphragms of different thicknesses. More precise thickness control helps reduce the scrap rate due to thickness non-compliance, thereby improving the yield and production efficiency. Through multiple rolling processes, the surface quality of the electrode diaphragm is further optimized, reducing minor defects and improving the overall quality of the electrode diaphragm.

[0043] Furthermore, it also includes: a machine tool 5; a bearing housing 6, of which there are multiple bearing housings 6 and which are movably arranged on the machine tool 5, the bearing housing 6 having several abutting inclined surfaces 601, the abutting inclined surfaces 601 being arranged on the side of the bearing housing 6 along the moving direction of the bearing housing 6, the composite roller 1 and the forming roller 3 being rotatably arranged on different bearing housings 6; and a fastener 7, which is movably arranged on the machine tool 5, and after the fastener 7 moves, it abuts against the abutting inclined surfaces 601.

[0044] In this embodiment, the machine tool 5 serves as the basic platform for the entire equipment, used to support and fix other components. Multiple bearing seats 6 are movably arranged on the machine tool 5, each bearing seat 6 having several abutment ramps 601 arranged on its side along the direction of movement of the bearing seat 6. The composite roller 1 and the forming roller 3 are rotatably mounted on different bearing seats 6, each roller having its own bearing seat 6 for support. Fasteners 7 are movably mounted on the machine tool 5 and can be adjusted in position as needed. When the fasteners 7 move and abut against the abutment ramps 601 on the bearing seat 6, the position of the bearing seat 6 can be changed, thereby adjusting the position of the composite roller 1 or the forming roller 3.

[0045] By adjusting the position of fastener 7, the bearing seat 6 can be fixed or unfixed. After unfixing, its position can be adjusted by pushing it with a drive component, such as an electric push rod or a hydraulic cylinder. After adjustment, the movable fastener 7 contacts the abutting inclined surface 601, generating a thrust perpendicular to the inclined surface, thereby fixing the position of the bearing seat 6. The distance between the composite roller 1 and the forming roller 3 can be adjusted very precisely to accommodate the processing requirements of electrode films of different thicknesses.

[0046] Furthermore, it also includes: a wedge 8, which is disposed on one side of the bearing seat 6; an adjusting wedge 9, which is raised and lowered on the machine tool 5 and slides against the inclined surface of the wedge 8 of the adjacent bearing seat 6; and a guide block 10, which is disposed on one side of the bearing seat 6, and there are two guide blocks 10, which are spaced apart and form a guide space between the two guide blocks 10, and the adjusting wedge 9 is raised and lowered within the guide space.

[0047] In this embodiment, the wedge 8 is disposed on one side of the bearing seat 6 and is used to cooperate with the adjusting wedge block 9. The wedge 8 has an inclined surface that matches the moving direction of the adjusting wedge block 9. The adjusting wedge block 9 is raised and lowered on the machine tool 5 and slides against the inclined surface of the wedge 8 on the adjacent bearing seat 6. By adjusting the raising and lowering of the wedge block 9, its contact state with the wedge 8 can be changed, thereby adjusting the position of the bearing seat 6. Two guide blocks 10 are disposed on one side of the bearing seat 6 and are spaced apart to form a guide space. The wedge block is raised and lowered within the guide space to ensure that the adjusting wedge block 9 moves along a predetermined direction during the raising and lowering process, avoiding offset or shaking of the adjusting wedge block 9 during movement and improving the adjustment accuracy.

[0048] Furthermore, the adjusting wedge 9 has a threaded groove, the machine tool 5 has several strip-shaped fixing holes 501, and also includes: a screw 11, the screw 11 passes through one of the strip-shaped fixing holes 501 and is threadedly connected to the threaded groove, the diameter of the strip-shaped fixing hole 501 is larger than the diameter of the screw 11; a rotation drive 12, the rotation drive 12 is movably mounted on the machine tool 5, and drives the screw 11 to rotate.

[0049] In this embodiment, the screw 11 passes through a strip-shaped fixing hole 501 in the machine tool 5 and is threadedly connected to the threaded groove on the adjusting wedge block 9. The screw 11 is designed so that when it rotates, it can push the adjusting wedge block 9 to move in a predetermined direction, thereby changing the position of the bearing seat 6. A rotation drive 12 is movably mounted on the machine tool 5 to drive the screw 11 to rotate. The rotation drive 12 can be an electric motor or other form of power source, capable of precisely controlling the rotation speed and direction of the screw 11. The machine tool 5 has several strip-shaped fixing holes 501, and the screw 11 passes through one of the strip-shaped fixing holes 501 and is connected to the threaded groove of the adjusting wedge block 9. The diameter of the strip-shaped fixing hole 501 is larger than the diameter of the screw 11, so that the screw 11 can adapt to the position adjustment changes of the bearing seat 6, and also facilitates the installation and removal of the screw 11.

[0050] Furthermore, the bearing housing 6 has a mounting groove 602 arranged around the periphery of the bearing housing 6, and also includes a heating ring 13 disposed within the mounting groove 602 for heating the bearing housing 6.

[0051] In this embodiment, the heating ring 13 is disposed within the mounting groove 602 of the bearing housing 6, which surrounds the periphery of the bearing housing 6. The design of the heating ring 13 allows it to heat the bearing housing 6 uniformly, thereby ensuring that the composite roller 1 and the forming roller 3 maintain appropriate temperatures during processing. The design of the mounting groove 602 ensures that the heating ring 13 fits tightly against the bearing housing 6, thereby effectively transferring heat. The heating ring 13 is heated by electricity or other heat sources to transfer heat to the bearing housing 6. The heating ring 13 may be equipped with a temperature control system to ensure that the bearing housing 6 is maintained within its optimal operating temperature range.

[0052] For example, when production stops at night, the electrode roller pressing equipment is shut down. After a night of shutdown, the roller temperature usually drops to around 30°C. When processing resumes the next day, the roller needs to be reheated to the standard processing temperature of around 130°C. During reheating, heat transfer occurs because the roller rotates on the bearing housing 6, with some heat transferred to the bearing housing 6 until the heat transfer reaches equilibrium. At this point, the temperature of the bearing housing 6 is approximately 70-80°C. In summary, the heat transfer between the bearing housing 6 and the roller during reheating significantly prolongs the heating equilibrium time, usually requiring more than 1 hour. The heating ring 13 can maintain the temperature of the bearing housing 6 during the night shutdown, keeping it at 70-80°C. This maintains the temperature of the bearing housing 6 and slightly increases the temperature of the roller. As a result, when the machine is restarted the next day, the bearing housing 6 is already at an equilibrium temperature, greatly accelerating the time to heat the roller to the standard processing temperature by approximately 30 minutes, thus significantly improving processing efficiency.

[0053] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An electrode rolling processing device, characterized in that, Roll forming for electrode films includes: Composite roller (1), having two composite rollers (1), forming a composite gap (101) between the two composite rollers (1), the two composite rollers (1) are used to roll-press and composite the electrode film; Two compound pressure rollers (2) are located below the two composite rollers (1). There is a pressing gap (201) between the two compound pressure rollers (2). The width of the pressing gap (201) is smaller than the width of the composite gap (101).

2. The electrode rolling processing equipment according to claim 1, characterized in that, Also includes: A forming roller (3) is arranged adjacent to the composite roller (1). A transfer gap (4) is formed between the forming roller (3) and the composite roller (1). The width of the transfer gap (4) is greater than the width of the composite gap (101). The transfer gap (4) is configured such that the electrode film is pressed when it passes through the transfer gap (4) and its thickness remains unchanged after passing through.

3. The electrode rolling processing equipment according to claim 2, characterized in that, The forming roller (3) has at least two, and the two forming rollers (3) are arranged adjacent to each other to form a pressing gap (201). The width of the pressing gap (201) is greater than the width of the transfer gap (4). The pressing gap (201) is configured such that the electrode film is pressed and becomes thinner after passing through the pressing gap (201).

4. The electrode rolling processing equipment according to claim 2, characterized in that, Also includes: Machine tools (5); A bearing housing (6) is provided, and multiple bearing housings (6) are movably arranged on the machine tool (5). The bearing housing (6) has several abutting inclined surfaces (601). The abutting inclined surfaces (601) are arranged on the side of the bearing housing (6) along the moving direction of the bearing housing (6). The composite roller (1) and the forming roller (3) are rotatably arranged on different bearing housings (6). Fastener (7) is movably mounted on the machine tool (5) and abuts against the abutting inclined surface (601) after it moves.

5. The electrode rolling processing equipment according to claim 4, characterized in that, Also includes: An inclined iron (8) is disposed on one side of the bearing housing (6); Adjusting slant block (9), which is raised and lowered on the machine tool (5) and slides against the inclined surface of the slant iron (8) of the adjacent bearing seat (6).

6. The electrode rolling processing equipment according to claim 5, characterized in that, Also includes: Guide block (10), the guide block (10) is disposed on one side of the bearing seat (6), there are two, the two guide blocks (10) are spaced apart, and a guide space is formed between the two guide blocks (10), and the adjusting inclined block (9) is raised and lowered in the guide space.

7. The electrode rolling processing equipment according to claim 5, characterized in that, The adjusting wedge (9) has a threaded groove, and the machine tool (5) has several strip-shaped fixing holes (501), and also includes: A screw (11) passes through one of the strip-shaped fixing holes (501) and is threadedly connected to the threaded groove; A rotation drive (12) is movably mounted on the machine tool (5) to drive the screw (11) to rotate.

8. The electrode rolling processing equipment according to claim 7, characterized in that, The diameter of the strip-shaped fixing hole (501) is larger than the diameter of the screw (11).

9. The electrode rolling processing equipment according to claim 4, characterized in that, The bearing housing (6) has a mounting groove (602) and further includes: A heating ring (13) is disposed in the mounting groove (602) for heating the bearing seat (6).

10. The electrode rolling processing equipment according to claim 9, characterized in that, The mounting groove (602) is arranged around the periphery of the bearing housing (6).

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