Electrode rolling processing equipment and processing technology

Abstract

The present invention relates to the field of electrode sheet manufacturing technology, and proposes an electrode rolling processing equipment and processing technology, including a machine tool; a first pressing roller, a second pressing roller and a third pressing roller are arranged on the machine tool in sequence; a first forming gap is between the first pressing roller and the second pressing roller, and a first transfer gap is between the second pressing roller and the third pressing roller, the first transfer gap is smaller than the width of the first forming gap, and the first transfer gap and the first forming width are configured so that the electrode diaphragm is pressed when passing through the first forming gap and the thickness becomes thinner after passing through, and the thickness remains unchanged after passing through the first transfer gap. Through the above technical solution, the problem of uneven powder thickness distribution in the prior art is solved, which causes the electrode diaphragms in adjacent gaps to become thinner, resulting in uneven thickness and reducing the consistency and stability of the product.

Description

Technical Field

[0001] The present invention relates to the technical field of electrode sheet manufacturing, and in particular to an electrode rolling processing device and a processing technology. Background Art

[0002] In the existing field of dry electrode rolling technology, the rolling forming process of electrode membranes often relies on the coordinated operation of multiple rollers. The ultimate goal is to shape an electrode membrane with precise and constant thickness. In this complex process, the spacing between each roller is gradually reduced. The electrode membrane moves along the gap between two adjacent rollers, accompanied by the rotation and extrusion of the rollers. In this process, the thickness of the membrane gradually decreases to meet the expected specifications. However, it must be pointed out that since the raw material used for rolling is lithium battery dry powder material, this material often has uneven distribution during the feeding process. Specifically, when the feeding operation is carried out, the dry powder material may accumulate more in some areas and be relatively scarce in other areas, resulting in a significant difference in the thickness of the powder entering the gap between two adjacent rollers.

[0003] This uneven distribution of powder thickness directly causes the uneven stress state of the roller. The deviation of pressure will cause the roller to deform, and the originally set adjacent gap will be reduced. As a result, the electrode membrane passing through the adjacent gap will become thinner and cannot meet the expected thickness standard, thus causing the problem of uneven thickness, which not only reduces the consistency and stability of the product, but may also cause a series of safety hazards and performance problems in the subsequent battery assembly and use. Summary of the invention

[0004] The present invention proposes an electrode rolling processing device and processing technology, which solves the problem of uneven powder thickness distribution in the related art, causing the electrode membranes in adjacent gaps to become thinner, resulting in uneven thickness and reducing the consistency and stability of the product.

[0005] The technical solution of the present invention is as follows: an electrode rolling processing equipment, used for rolling forming of electrode membranes, comprising:

[0006] machine tool;

[0007] A first pressing roller, a second pressing roller and a third pressing roller, wherein the first pressing roller, the second pressing roller and the third pressing roller are sequentially arranged at intervals on the machine tool;

[0008] The first forming gap is between the first pressing roller and the second pressing roller, and the first transfer gap is between the second pressing roller and the third pressing roller.

[0009] The first transfer gap is smaller than the width of the first molding gap, and the widths of the first transfer gap and the first molding gap are configured so that the electrode membrane is pressed and becomes thinner when passing through the first molding gap, and is pressed and remains unchanged in thickness when passing through the first transfer gap.

[0010] Optionally, a difference between the widths of the first transfer gap and the first molding gap / a width of the first molding gap is a, and a≤8%.

[0011] Optionally, the first pressing roller, the second pressing roller and the third pressing roller together constitute a first rolling assembly, the first rolling assembly has two groups, the third pressing rollers of the two groups of the first rolling assemblies are adjacent to each other to form a first composite gap, and the width difference ratio of the first transfer gap and the first forming gap to the difference between the first composite gap and the first transfer gap is in the range of b, b=1: (5~20).

[0012] Optionally, the third pressing roller of one of the first rolling assemblies is rotatably arranged on the machine tool, and the first pressing roller and the second pressing roller are both movably and rotatably arranged on the machine tool, and another of the first rolling assemblies is movably and rotatably arranged on the machine tool.

[0013] Optionally, it also includes:

[0014] A fourth pressing roller, a second forming gap is formed between the fourth pressing roller and the third pressing roller, the second forming gap is smaller than the width of the first transfer gap, and the ratio of the width difference between the second forming gap and the first transfer gap to the width difference between the first transfer gap and the first forming gap is in the range of c, c=1:(5~20).

[0015] Optionally, it also includes:

[0016] A fifth pressing roller, a second transfer gap is formed between the fifth pressing roller and the fourth pressing roller, the second transfer gap is smaller than the width of the second forming gap, the width difference between the second transfer gap and the second forming gap / the second forming gap is d, d≤8%.

[0017] Optionally, the first pressing roller, the second pressing roller, the third pressing roller, the fourth pressing roller and the fifth pressing roller together constitute a second rolling assembly, and the second rolling assembly has two groups, and the fifth pressing rollers of the two groups of the second rolling assemblies are adjacently arranged to form a second composite gap.

[0018] Optionally, the ratio of the difference between the width of the second transfer gap and the second molding gap to the difference between the width of the second composite gap and the second transfer gap is in the range of e, e=1:(5~20).

[0019] Optionally, the fifth pressing roller of one of the second rolling assemblies is fixedly and rotatably arranged on the machine tool, and the first pressing roller, the second pressing roller, the third pressing roller and the fourth pressing roller are all movably and rotatably arranged on the machine tool, and another of the second rolling assemblies is movably and rotatably arranged on the machine tool.

[0020] An electrode rolling process, using the electrode rolling processing equipment to carry out processing and production, comprises the following steps:

[0021] S1: Fix one of the third pressing rollers or the fifth pressing roller and adjust the positions of the remaining pressing rollers;

[0022] S2: Roll-pressing the lithium battery dry powder material using two first rolling assemblies or two second rolling assemblies;

[0023] S3: The product is roll-formed by two third rollers or a fifth roller.

[0024] The working principle and beneficial effects of the present invention are:

[0025] In the present invention, the lithium battery dry powder material is placed at the feed end of the machine tool. As the equipment is running, the lithium battery dry powder material first enters the first forming gap. Due to the width setting of the first forming gap and the extrusion of the first pressing roller and the second pressing roller, the lithium battery dry powder material will be subjected to a large pressure when passing through this gap, and will be formed into an electrode membrane with a certain thickness, thereby achieving preliminary roll forming.

[0026] After being processed by the first forming gap, the electrode diaphragm continues to move forward and enters the first transfer gap. Although the first transfer gap is smaller than the first forming gap, due to the special configuration of its width and pressure, the electrode diaphragm maintains pressure balance when passing through the gap, thereby achieving smooth transfer without changing the thickness.

[0027] For example, when an electrode diaphragm passes through a gap with a thickness difference of ≥50μm, it will exceed its elastic variation range and be squeezed and thinned. (In the actual electrode sheet rolling process, it is a more complicated issue to determine the range within which the electrode diaphragm width will not change, because this is affected by many factors, such as the properties of the electrode material, the initial thickness, the accuracy and performance of the rolling equipment, and the control of process parameters. Here, only a practically measurable value is provided for reference).

[0028] Taking the width of the first molding gap as 200μm as an example, the thickness of the electrode membrane passing through the first molding gap must be greater than 200μm, and the width of the first transfer gap can be set to 190-195μm, which is slightly smaller than the width of the first molding gap, and the difference with the first molding width is 5-10μm, where a=(5~10) / 200=2.5%~5%.

[0029] This example only provides a numerical reference in a specific process production process. Specifically, the numerical setting can be adjusted within the range of a≤8% according to different processes. The purpose is to make the electrode membrane only subject to the transfer force when passing through the first transfer gap, without being subject to the extrusion force or being subject to a slight extrusion force (which does not cause the thickness of the electrode membrane to change);

[0030] With a uniform range of 100μm, the uneven thickness range of lithium battery dry powder materials is about 80μm or less (usually smaller), and the thickness of the electrode diaphragm greater than the range of the first forming gap is: 100-180μm. By default, an electrode roller with a higher hardness and better rigidity is used, with a larger diameter and a stable support structure, and the local deformation may be around 10μm. That is, the width of the first transfer gap is about 180-185μm. At this time, a=7.5%-10%, the width difference between the first transfer gap and the first forming gap is ≤20μm, and <50μm, and will not cause compression on the thickness of the electrode diaphragm. For this reason, during the working process, the second roller only participates in the extrusion of the electrode diaphragm on the side close to the first roller, and the other side only plays the role of transferring the electrode diaphragm. Even if one side is deformed due to uneven material, the uniformity of the material transferred on the other side can still be guaranteed. The transferred electrode diaphragm can be further formed in the next forming part.

[0031] By setting the forming gap and transfer gap with different functions, the thickness change of the electrode membrane during the rolling process can be controlled more accurately, thereby improving the thickness consistency and quality stability of the product. Reasonable gap configuration enables continuous and efficient processing of the electrode membrane during the rolling process, reduces rework and scrap caused by improper thickness adjustment, and improves overall production efficiency. Precise thickness control reduces material waste and improves product qualification rate, thereby reducing production costs. In actual production, this electrode rolling processing equipment can produce electrode membranes with uniform thickness and excellent performance to meet the needs of high-end battery manufacturing. Compared with traditional rolling equipment, its product qualification rate has increased by 15% and production efficiency has increased by 20%, bringing significant economic benefits to the company. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0033] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0034] Figure 2 This is a schematic diagram of the structure of Example 2 of the present invention.

[0035] In the figure: 1. first pressing roller; 2. second pressing roller; 3. third pressing roller; 4. fourth pressing roller; 5. fifth pressing roller; 6. first forming gap; 7. first transfer gap; 8. second forming gap; 9. second transfer gap; 10. first composite gap; 11. second composite gap; 12. machine tool; 13. first rolling assembly; 14. second rolling assembly. DETAILED DESCRIPTION

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0037] In order to simplify the drawings, only the parts related to the invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0038] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0040] Example 1

[0041] Reference Figure 1, an electrode rolling processing equipment is proposed, which is used for roll-forming of electrode membranes, including: a machine tool 12; a first rolling roller 1, a second rolling roller 2 and a third rolling roller 3, the first rolling roller 1, the second rolling roller 2 and the third rolling roller 3 are arranged on the machine tool 12 in sequence; a first forming gap 6 is formed between the first rolling roller 1 and the second rolling roller 2, and a first transfer gap 7 is formed between the second rolling roller 2 and the third rolling roller 3, the first transfer gap 7 is smaller than the width of the first forming gap 6, and the widths of the first transfer gap 7 and the first forming gap 6 are configured such that the electrode membrane is pressed when passing through the first forming gap 6 and its thickness becomes thinner after passing through, and is pressed when passing through the first transfer gap 7 and its thickness remains unchanged after passing through.

[0042] The difference in width between the first transfer gap 7 and the first molding gap 6 / the width of the first molding gap 6 is a, and a≤8%.

[0043] In this embodiment, the lithium battery dry powder material is placed at the feed end of the machine tool 12. As the equipment is running, the lithium battery dry powder material first enters the first forming gap 6. Due to the width setting of the first forming gap 6 and the extrusion of the first pressing roller 1 and the second pressing roller 2, the lithium battery dry powder material will be subjected to a large pressure when passing through this gap, and will be formed into an electrode membrane with a certain thickness, thereby achieving preliminary roll forming.

[0044] The electrode diaphragm processed by the first forming gap 6 continues to move forward and enters the first transfer gap 7. Although the first transfer gap 7 is smaller than the first forming gap 6, the electrode diaphragm can still maintain pressure balance when passing through the gap, that is, it is not subjected to a transfer force that can change the thickness, thereby achieving a smooth transfer.

[0045] Taking the example that when the electrode diaphragm passes through a gap with a thickness difference of ≥50μm, it will exceed its elastic variation range and be squeezed and thinned. For example, the width of the first molding gap 6 is 200μm. The thickness of the electrode diaphragm passing through the first molding gap 6 must be greater than 200μm. The width of the first transfer gap 7 can be set to 190-195μm, which is slightly smaller than the width of the first molding gap 6. The difference with the width of the first molding gap 6 is 5-10μm, where a=(5~10) / 200=2.5%~5%.

[0046] (The change in the width of the electrode membrane is affected by many factors, such as the properties of the electrode material, the initial thickness, the accuracy and performance of the rolling equipment, and the control of the process parameters, etc. Here, only a numerical value used in actual measurement is provided for reference.) The value of a can be adjusted within the range of a≤8% according to different processes, and its purpose is to make the electrode membrane only subject to the transfer force when passing through the first transfer gap 7, without being subject to the squeezing force or being subject to a slight squeezing force (which does not cause the thickness of the electrode membrane to change);

[0047] With a uniform range of 100μm, the uneven thickness range of lithium battery dry powder material is about 80μm or less (usually smaller), and the thickness of the electrode membrane greater than the range of the first forming gap 6 is: 100-180μm. By default, the electrode roller is made of a material with higher hardness and better rigidity, with a larger diameter and a stable supporting structure, and the local deformation may be around 10μm. That is, the width of the first transfer gap 7 is about 180-185μm. At this time, a=7.5%-10%, the width difference between the first transfer gap 7 and the first forming gap 6 is ≤20μm, and <50μm, and it will not exceed its elastic variation range, causing the thickness of the electrode membrane to become thinner after extrusion. Because of this, during the operation, the second roller 2 only participates in the extrusion of the electrode membrane on the side close to the first roller 1, and the other side only plays the role of transferring the electrode membrane. Even if one side of the second roller 2 (the first forming gap 6) is deformed due to uneven material, it can still be ensured that the other side of the second roller 2 (the first transfer gap 7) will not cause deformation and thinning of the material, and only plays a transfer role. The transferred electrode membrane can be further formed at the next forming position.

[0048] By setting the forming gap and transfer gap with different functions, the thickness change of the electrode diaphragm during the rolling process can be controlled more accurately, thereby improving the thickness consistency and quality stability of the product. Reasonable gap configuration enables continuous and efficient processing of the electrode diaphragm during the rolling process, reducing rework and scrap caused by improper thickness adjustment, and improving overall production efficiency. Accurate thickness control reduces material waste and improves product qualification rate, thereby reducing production costs. In actual production, the use of this electrode rolling processing equipment can produce electrode diaphragms with uniform thickness and excellent performance to meet the needs of high-end battery manufacturing. Compared with traditional rolling equipment, its product qualification rate has increased by 15% and production efficiency has increased by 20%.

[0049] Furthermore, the first pressing roller 1, the second pressing roller 2 and the third pressing roller 3 together constitute a first rolling assembly 13, and the first rolling assembly 13 has two groups. The third pressing rollers 3 of the two groups of first rolling assemblies 13 are arranged adjacent to each other to form a first composite gap 10, and the width difference ratio interval of the first transfer gap 7 and the first molding gap 6 and the difference between the first composite gap 10 and the first transfer gap 7 is b, b=1: (5~20).

[0050] In this embodiment, a dry electrode rolling device is used, and two groups of first rolling assemblies 13 are installed. The third pressing rollers 3 of the two groups of first rolling assemblies 13 are arranged adjacent to each other to form a first composite gap 10. During the processing, the lithium battery dry powder material is loaded at the first pressing rollers 1 of the two first rolling assemblies 13 respectively, and an electrode membrane is formed after passing through the first molding machine gap. The electrode membrane enters the first composite gap 10 after passing through the first transfer gap 7. In the first composite gap 10, the electrode membrane transferred by the two first rolling assemblies 13 is further rolled by two adjacent third pressing rollers 3 (in the actual production process, a feeding roller is usually arranged on the upper part of the first composite gap 10, and the feeding roller can feed materials according to different production products, such as positive electrode: graphite; negative electrode: ternary lithium and lithium iron phosphate, etc.), and the two electrode membranes are rolled together with the positive electrode / negative electrode to form the final product.

[0051] In actual operation, the width of each gap is strictly measured and controlled. Assuming that the width difference between the first transfer gap 7 and the first forming gap 6 is X, the width difference between the first composite gap 10 and the first transfer gap 7 is between 5X and 20X. These gaps are precisely adjusted through high-precision adjustment devices and measuring tools. By reasonably setting the gap width difference ratio, the electrode sheet can be gradually and finely rolled, effectively improving the uniformity and consistency of the rolling, thereby improving the performance and quality of the electrode sheet. Different width difference ratio ranges provide more options for the production of electrode sheets of different specifications and requirements, so that the production process can adapt to diverse market demands.

[0052] Furthermore, the third pressing roller 3 of one of the first rolling assemblies 13 is fixedly and rotatably arranged on the machine tool 12, and the first pressing roller 1 and the second pressing roller 2 are both movably and rotatably arranged on the machine tool 12, and the other first rolling assembly 13 is movably and rotatably arranged on the machine tool 12.

[0053] In this embodiment, during the assembly of the equipment, the third roller 3 of one of the first roller pressing assemblies 13 is firmly mounted on the machine tool 12, and it is ensured that it can rotate smoothly. At the same time, the first roller 1 and the second roller 2 in the assembly are mounted on the machine tool 12 through a specific moving device, so that they can rotate and move as needed. For the other first roller pressing assembly 13, the whole is mounted on the machine tool 12 through a moving mechanism, so that the position can be adjusted while rotating.

[0054] In actual operation, the position of the movable pressure roller is flexibly controlled according to the rolling requirements of the electrode diaphragm. For example, when the rolling gap needs to be adjusted, the first pressure roller 1 and the second pressure roller 2 are accurately moved by the corresponding driving device, or the other first rolling assembly 13 is moved as a whole to achieve the ideal rolling effect. The movable pressure roller can adjust its position in real time according to the actual situation and control the rolling gap more accurately, thereby improving the rolling accuracy and quality of the electrode diaphragm. The position of the pressure roller can be easily adjusted to meet the processing requirements of electrode diaphragms of different thicknesses, widths and other specifications, thereby increasing the versatility of the equipment. When the equipment needs to be maintained, cleaned or debugged, the pressure roller can be flexibly moved to make its operation more convenient. By quickly and accurately adjusting the position of the pressure roller, the production interruption time caused by adjusting the equipment is reduced, and the overall production efficiency is improved.

[0055] Example 2

[0056] Reference Figure 2 , which is the second embodiment of the present invention, compared with embodiment 1, further includes: a fourth pressing roller 4, a second forming gap 8 is formed between the fourth pressing roller 4 and the third pressing roller 3, the second forming gap 8 is smaller than the width of the first transfer gap 7, and the width difference between the second forming gap 8 and the first transfer gap 7 is in the range of c, c=1: (5~20);

[0057] The fifth pressing roller 5 forms a second transfer gap 9 between the fifth pressing roller 5 and the fourth pressing roller 4. The second transfer gap 9 is smaller than the width of the second forming gap 8. The width difference between the second transfer gap 9 and the second forming gap 8 / the second forming gap 8 is d, and d≤8%.

[0058] The first pressing roller 1 , the second pressing roller 2 , the third pressing roller 3 , the fourth pressing roller 4 and the fifth pressing roller 5 together constitute a second rolling assembly 14 . The second rolling assembly 14 has two groups. The fifth pressing rollers 5 of the two groups of second rolling assemblies 14 are adjacently arranged to form a second composite gap 11 .

[0059] Furthermore, the fifth pressing roller 5 of one of the second rolling assemblies 14 is fixedly and rotatably arranged on the machine tool 12, and the first pressing roller 1, the second pressing roller 2, the third pressing roller 3 and the fourth pressing roller 4 are all movably and rotatably arranged on the machine tool 12, and the other second rolling assembly 14 is movably and rotatably arranged on the machine tool 12.

[0060] In this embodiment, a "ten-roll process" is provided. Compared with embodiment 1, a fourth pressing roller 4 and a fifth pressing roller 5 are added. The same principle is adopted, which will not be described in detail here. Through multiple rolling, the physical properties of the electrode membrane are significantly improved. Its thickness is more precise, the surface is more flat and smooth, and the internal structure is more compact and uniform. This series of improvements directly improves the quality and performance of the electrode membrane, so that it can show better electrochemical performance, stability and service life in subsequent battery assembly and use.

[0061] An electrode rolling process, using an electrode rolling processing device for processing and production, includes the following steps:

[0062] S1: fix one of the third pressing rollers 3 or the fifth pressing rollers 5, and adjust the positions of the remaining pressing rollers (the remaining pressing rollers refer to all the pressing rollers except one third pressing roller 3 in the two first pressing roller assemblies or except one fifth pressing roller 5 in the two second pressing roller assemblies);

[0063] S2: Roll-pressing the lithium battery dry powder material using two first rolling assemblies 13 or two second rolling assemblies 14;

[0064] S3: The product is roll-formed by two third pressing rollers 3 or two fifth pressing rollers 5 .

[0065] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An electrode rolling processing equipment, characterized in that: Used for roll forming of electrode membranes, including: Machine tools (12); A first pressing roller (1), a second pressing roller (2) and a third pressing roller (3), wherein the first pressing roller (1), the second pressing roller (2) and the third pressing roller (3) are sequentially arranged at intervals on the machine tool (12); A first forming gap (6) is formed between the first pressing roller (1) and the second pressing roller (2), and a first transfer gap (7) is formed between the second pressing roller (2) and the third pressing roller (3). The first transfer gap (7) is smaller than the width of the first forming gap (6), and the widths of the first transfer gap (7) and the first forming gap (6) are configured such that the electrode membrane is pressed when passing through the first forming gap (6) and its thickness becomes thinner after passing through, and is pressed when passing through the first transfer gap (7) and its thickness remains unchanged after passing through; The difference between the width of the first transfer gap (7) and the first molding gap (6) / the width of the first molding gap (6) is a, and a≤8%.

2. The electrode rolling processing equipment according to claim 1, characterized in that: The first pressing roller (1), the second pressing roller (2) and the third pressing roller (3) together constitute a first rolling assembly (13). The first rolling assembly (13) has two groups. The third pressing rollers (3) of the two groups of the first rolling assemblies (13) are arranged adjacent to each other to form a first composite gap (10). The width difference ratio between the first transfer gap (7) and the first forming gap (6) and the width difference ratio between the first composite gap (10) and the first transfer gap (7) is in the range of b, b=1:(5~20), and the width of the first composite gap (10) is configured such that the electrode diaphragm is pressed when passing through the first composite gap (10) and its thickness becomes thinner after passing through.

3. The electrode rolling processing equipment according to claim 2, characterized in that: The third pressing roller (3) of one of the first rolling assemblies (13) is fixedly and rotatably arranged on the machine tool (12), and the first pressing roller (1) and the second pressing roller (2) are both movably and rotatably arranged on the machine tool (12), and the other first rolling assembly (13) is movably and rotatably arranged on the machine tool (12).

4. The electrode rolling processing equipment according to claim 3, characterized in that: Also includes: A fourth pressing roller (4), a second forming gap (8) is formed between the fourth pressing roller (4) and the third pressing roller (3), the second forming gap (8) is smaller than the width of the first transfer gap (7), the width difference between the second forming gap (8) and the first transfer gap (7) is in the range of c to the width difference between the first transfer gap (7) and the first forming gap (6), c=1:(5~20), and the width of the second forming gap (8) is configured such that the electrode diaphragm is pressed when passing through the second forming gap (8) and its thickness becomes thinner after passing through.

5. The electrode rolling processing equipment according to claim 4, characterized in that: Also includes: A fifth pressing roller (5), wherein a second transfer gap (9) is formed between the fifth pressing roller (5) and the fourth pressing roller (4), wherein the second transfer gap (9) is smaller than the width of the second forming gap (8), and the width difference between the second transfer gap (9) and the second forming gap (8) / the second forming gap (8) is d, d≤8%, and the width of the second transfer gap (9) is configured such that the electrode diaphragm is pressed when passing through the second transfer gap (9) and the thickness thereof remains unchanged after passing through the second transfer gap (9).

6. The electrode rolling processing equipment according to claim 5, characterized in that: The first pressing roller (1), the second pressing roller (2), the third pressing roller (3), the fourth pressing roller (4) and the fifth pressing roller (5) together constitute a second rolling assembly (14). The second rolling assembly (14) has two groups. The fifth pressing rollers (5) of the two groups of the second rolling assemblies (14) are arranged adjacent to each other to form a second composite gap (11). The width of the second composite gap (11) is configured such that the electrode membrane is pressed when passing through the second composite gap (11) and its thickness becomes thinner after passing through the second composite gap (11).

7. The electrode rolling processing equipment according to claim 6, characterized in that: The ratio of the width difference between the second transfer gap (9) and the second molding gap (8) to the width difference between the second composite gap (11) and the second transfer gap (9) is in the range of e, e=1:(5-20).

8. The electrode rolling processing equipment according to claim 7, characterized in that: The fifth pressing roller (5) of one of the second pressing assemblies (14) is rotatably arranged on the machine tool (12), and the first pressing roller (1), the second pressing roller (2), the third pressing roller (3) and the fourth pressing roller (4) are all movably and rotatably arranged on the machine tool (12), and the other second pressing assembly (14) is movably and rotatably arranged on the machine tool (12).

9. An electrode rolling process, characterized in that: The electrode rolling processing equipment according to claim 8 is used for processing and production, comprising the following steps: S1: fixing one of the third pressing rollers (3) or the fifth pressing roller (5), and adjusting the positions of the remaining pressing rollers; S2: using two sets of first rolling assemblies (13) or two sets of second rolling assemblies (14) to roll-press the lithium battery dry powder material; S3: The product is roll-formed by two third pressing rollers (3) or two fifth pressing rollers (5).

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