Pole piece covering experiment machine

Abstract

The utility model discloses a pole piece covering experiment machine. Comprising a pole piece unwinding mechanism used for supplying a pole piece, an attached PET unwinding mechanism used for supplying a PET film attached with a foil, a covering mechanism used for covering the foil attached with the PET film on the pole piece, a PET winding mechanism used for recycling the PET film after the foil is stripped, and a thickness measuring mechanism used for measuring the thickness of the pole piece covered with the foil, the product winding mechanism is used for recycling the pole piece coated with the foil, the pole piece unwinding mechanism and the attached material PET unwinding mechanism are arranged on one side of the coating mechanism, the PET winding mechanism, the thickness measuring mechanism and the product winding mechanism are arranged on the other side of the coating mechanism, and the thickness measuring mechanism is arranged between the coating mechanism and the product winding mechanism. According to the utility model, the thickness measuring mechanism is additionally arranged between the covering mechanism and the product winding mechanism, so that the thickness of the foil-covered pole piece can be measured in real time, and the covering thickness of the pole piece is ensured to meet the production requirement.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery production and processing equipment, and specifically to a pole piece lamination testing machine. Background Art

[0002] At present, the lithium battery industry at home and abroad has a good development prospect. Lithium-ion batteries have been widely used in portable appliances such as laptops, cameras, and mobile communications due to their unique performance advantages. At present, large-capacity lithium-ion batteries have been officially used in electric vehicles, becoming one of the main power sources for electric vehicles in the 21st century, and will be used in artificial satellites, aerospace, and energy storage. With the shortage of energy and the pressure of environmental protection in the world, lithium batteries are widely used in the electric vehicle industry, especially the emergence of lithium iron phosphate batteries, which has promoted the development and application of the lithium battery industry.

[0003] In the battery production process, the lithium replenishment process of lithium-ion battery pole pieces is a key technology to increase the capacity of lithium-ion batteries. The key to the lithium replenishment process lies in calendering and coating. The coating process is a process in which the rolled lithium film is transferred to the negative electrode of the battery in sections or continuously according to the characteristics of the pole piece, so that the pole piece forms a lithium-containing pole piece.

[0004] The Chinese utility model patent with patent number CN202022086857.3 discloses a coating mechanism, including a pole piece conveying mechanism, a film material conveying mechanism, a roller mechanism and a pressure mechanism. The roller mechanism includes a fixed roller and a movable roller arranged parallel to each other in the horizontal direction. The pole piece conveying mechanism horizontally feeds the pole piece between the fixed roller and the movable roller. The film material conveying mechanism wraps the traction film attached with the lithium film on the fixed roller and the movable roller. The pressure mechanism drives the movable roller to apply pressure in the direction of the fixed roller. The lithium film is attached to the pole piece under the pressure of the fixed roller and the movable roller. The coating mechanism realizes the coating of the lithium film on the traction film on the pole piece to form a lithium-containing pole piece.

[0005] However, the above-mentioned coating mechanism lacks the function of detecting the thickness of the electrode after coating, and cannot ensure whether the coating thickness meets the production requirements. Utility Model Content

[0006] In order to overcome the problem that the coating mechanism in the prior art lacks the function of detecting the thickness of the electrode after coating and cannot ensure whether the coating thickness meets the production requirements, the utility model provides a electrode coating testing machine.

[0007] The technical solution of the utility model is as follows:

[0008] A pole piece lamination testing machine comprises a pole piece unwinding mechanism for supplying pole pieces, a PET unwinding mechanism for supplying a PET film with a foil attached thereto, a laminating mechanism for laminating the foil attached to the PET film on the pole piece, a PET rewinding mechanism for recovering the PET film after the foil is peeled off, a thickness measuring mechanism for measuring the thickness of the pole piece after the foil is coated, and a product rewinding mechanism for recovering the pole piece after the foil is coated, wherein the pole piece unwinding mechanism and the PET unwinding mechanism are arranged on one side of the laminating mechanism, the PET rewinding mechanism, the thickness measuring mechanism and the product rewinding mechanism are arranged on the other side of the laminating mechanism, and the thickness measuring mechanism is arranged between the laminating mechanism and the product rewinding mechanism.

[0009] As a preferred embodiment of the pole piece lamination testing machine of the utility model, the thickness measuring mechanism is a laser thickness gauge.

[0010] As a preferred embodiment of the electrode lamination testing machine of the utility model, a first tape connecting mechanism is arranged between the electrode unwinding mechanism and the lamination mechanism, and a second tape connecting mechanism is arranged between the thickness measuring mechanism and the lamination mechanism. The electrode passes through the first tape connecting mechanism, the lamination mechanism, the second tape connecting mechanism, and the thickness measuring mechanism in sequence.

[0011] As a preferred embodiment of the pole piece lamination testing machine of the utility model, an iron removal mechanism for removing iron from both sides of the pole piece is arranged between the first connecting mechanism and the lamination mechanism, and the pole piece passes through the first connecting mechanism, the iron removal mechanism and the lamination mechanism in sequence.

[0012] As a preferred embodiment of the pole piece cladding test machine of the utility model, the iron removal mechanism includes two magnetic bars arranged opposite to each other, and the pole piece passes between the two magnetic bars.

[0013] As a preferred embodiment of the pole piece lamination testing machine of the utility model, a first tension adjustment mechanism for adjusting the pole piece tension is arranged between the first connecting mechanism and the laminating mechanism, and a second tension adjustment mechanism for adjusting the pole piece tension after foil lamination is arranged between the laminating mechanism and the second connecting mechanism. The pole piece passes through the first connecting mechanism, the first tension adjustment mechanism, the laminating mechanism, the second tension adjustment mechanism, and the second connecting mechanism in sequence.

[0014] As a preferred embodiment of the electrode lamination testing machine of the utility model, a third tension adjustment mechanism for adjusting the tension of the PET film attached to the foil is arranged between the PET unwinding mechanism and the laminating mechanism, and the PET film attached to the foil passes through the third tension adjustment mechanism and the laminating mechanism in sequence.

[0015] As a preferred embodiment of the pole piece lamination testing machine of the utility model, a peeling angle adjustment roller for adjusting the peeling angle of the PET film is arranged between the lamination mechanism and the PET winding mechanism, and the peeling angle adjustment roller can adjust the position in the horizontal and vertical directions.

[0016] As a preferred embodiment of the electrode lamination testing machine of the utility model, a fourth tension adjustment mechanism for adjusting the tension of the PET film after peeling off the foil is arranged between the lamination mechanism and the PET winding mechanism. After the PET film after peeling off the foil passes through the fourth tension adjustment mechanism, it is wound on the PET winding mechanism.

[0017] As a preferred embodiment of the electrode lamination testing machine of the utility model, an electrostatic eliminator mechanism for eliminating static electricity on the PET film after the foil is peeled off is arranged between the lamination mechanism and the PET winding mechanism. After the foil is peeled off, the PET film passes through the electrostatic eliminator and is wound on the PET winding mechanism.

[0018] As a preferred embodiment of the pole piece lamination testing machine of the utility model, it also includes a thermal insulation film unwinding mechanism for supplying the thermal insulation film, the thermal insulation film unwinding mechanism is arranged above the product winding mechanism, the thermal insulation film supplied by the thermal insulation film unwinding mechanism is located on one side of the pole piece foil and is wound up on the product winding mechanism at the same time as the pole piece after the foil is coated.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] 1. By adding a thickness measuring mechanism between the laminating mechanism and the product winding mechanism, the thickness of the electrode after the foil is coated can be measured in real time, so as to ensure that the laminating thickness of the electrode meets the production requirements. This is crucial to ensure product quality, because the laminating thickness of the electrode directly affects the performance and safety of the battery; through real-time online measurement, problems in the production process can be discovered in time, such as uneven foil adhesion, insufficient laminating pressure, etc., so as to adjust the production parameters in time, such as the spacing and pressure between the upper and lower pressure rollers, to avoid the production of batches of unqualified products and improve production quality;

[0021] 2. By arranging an iron removal mechanism for double-sided iron removal of the pole piece between the first tape connection mechanism and the laminating mechanism, it can be ensured that the foil can be evenly and tightly laminated on the surface of the pole piece, thereby improving the quality and performance of the final product;

[0022] 3. By arranging a peeling angle adjustment roller for adjusting the peeling angle of the PET film between the laminating mechanism and the PET winding mechanism, it can adapt to the changes of different widths and different bonding strengths of materials;

[0023] 4. By arranging an electrostatic elimination mechanism between the laminating mechanism and the PET winding mechanism for eliminating static electricity on the PET film after the foil is peeled off, it is possible to prevent the film from absorbing dust, impurities or curling during winding or subsequent processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 This is a schematic diagram of the structure of an embodiment of the utility model;

[0026] Figure 2 It is a structural schematic diagram of another embodiment of the utility model;

[0027] Figure 3 This is a schematic structural diagram of another embodiment of the utility model.

[0028] In the figure,

[0029] 1. Pole piece unwinding mechanism; 2. PET unwinding mechanism; 3. Laminating mechanism; 301. Upper pressure roller; 302. Lower pressure roller; 4. PET winding mechanism; 5. Thickness measuring mechanism; 6. Product winding mechanism; 7. First belt connecting mechanism; 8. Second belt connecting mechanism; 9. Iron removal mechanism; 10. First tension adjusting mechanism; 11. Second tension adjusting mechanism; 12. Third tension adjusting mechanism; 13. Fourth tension adjusting mechanism; 14. Peeling angle adjustment roller; 15. Static electricity elimination mechanism; 16. Thermal insulation film unwinding mechanism. DETAILED DESCRIPTION

[0030] In order to make the technical problems, technical solutions and beneficial effects to be solved by the utility model more clearly understood, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. At the same time, it is stated that the embodiments described below are only used to explain the utility model and are not used to limit the utility model.

[0031] It should be noted that the terms "install", "set", "connect", "fix" and the like should be understood in a broad sense, for example, they can be fixedly connected, detachably connected, or integrated; they can be mechanically connected or electrically connected; they can be directly connected, or indirectly connected through an intermediate medium, or they can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. The indicated orientation or position relationship is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the application product is usually placed when in use, or the orientation or position relationship commonly understood by those skilled in the art, or the orientation or position relationship in which the application product is usually placed when in use. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. The terms "first", "second", "third" and "fourth" are only used for the purpose of convenience of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features.

[0032] See also Figure 1 This embodiment provides a pole piece laminating test machine, including a pole piece unwinding mechanism 1 for supplying pole pieces, a PET unwinding mechanism 2 for supplying a PET film with a foil attached, a laminating mechanism 3 for laminating the foil attached to the PET film on the pole piece, a PET rewinding mechanism 4 for recovering the PET film after the foil is peeled off, a thickness measuring mechanism 5 for measuring the thickness of the pole piece after the foil is coated, and a product rewinding mechanism 6 for recovering the pole piece after the foil is coated. Among them, the pole piece unwinding mechanism 1 and the PET unwinding mechanism 2 are arranged on one side of the laminating mechanism 3, the PET rewinding mechanism 4, the thickness measuring mechanism 5 and the product rewinding mechanism 6 are arranged on the other side of the laminating mechanism 3, and the thickness measuring mechanism 5 is arranged between the laminating mechanism 3 and the product rewinding mechanism 6.

[0033] During operation, the electrode supplied by the electrode unwinding mechanism 1 and the PET film with attached foil supplied by the attached PET unwinding mechanism 2 enter the laminating mechanism 3 together, wherein the electrode is located on one side of the PET film attached to the foil, and then the laminating mechanism 3 laminates the foil attached to the PET film on the electrode. The laminating mechanism 3 can adjust the spacing and pressure between the upper pressing roller 301 and the lower pressing roller 302 to achieve an ideal counter-pressure laminating effect. After coming out of the laminating mechanism 3, the PET film is peeled off and rolled up and recovered by the PET winding mechanism 4. When the electrode coated with foil passes through the thickness measuring mechanism 5, the thickness measuring mechanism 5 measures the thickness thereof, so as to judge whether the laminating thickness meets the production requirements according to the measurement result, and finally the electrode coated with foil is rolled up and recovered by the electrode unwinding mechanism 1.

[0034] The utility model can perform real-time thickness measurement of the electrode sheet after foil coating by adding a thickness measuring mechanism 5 between the laminating mechanism 3 and the product winding mechanism 6, so as to ensure that the laminating thickness of the electrode sheet meets the production requirements, which is very important for ensuring product quality, because the laminating thickness of the electrode sheet directly affects the performance and safety of the battery; through real-time online measurement, problems in the production process, such as uneven foil adhesion, insufficient laminating pressure, etc., can be discovered in time, so as to adjust the production parameters in time, such as the spacing and pressure between the upper pressing roller 301 and the lower pressing roller 302, to avoid the production of batches of defective products and improve production quality.

[0035] In one embodiment, the thickness measuring mechanism 5 is a laser thickness gauge, which uses laser technology to measure the thickness of various materials non-contactly. The laser thickness gauge has many advantages, such as non-contact measurement, high precision, high speed, real-time online measurement, etc. Compared with the traditional contact thickness gauge, the laser thickness gauge will not lose accuracy due to wear, so it is more suitable for long-term and continuous measurement tasks. In addition, the laser thickness gauge can also realize automatic and intelligent measurement, improve production efficiency and product quality.

[0036] See also Figure 2 In one embodiment, a first belt-joining mechanism 7 is provided between the electrode unwinding mechanism 1 and the laminating mechanism 3, and a second belt-joining mechanism 8 is provided between the thickness measuring mechanism 5 and the laminating mechanism 3. The electrode passes through the first belt-joining mechanism 7, the laminating mechanism 3, the second belt-joining mechanism 8, and the thickness measuring mechanism 5 in sequence. Specifically, the first belt-joining mechanism 7 and the second belt-joining mechanism 8 have the same structure, including a clamping block and a clamping cylinder for clamping the electrode, and the clamping cylinder is drivingly connected to the clamping block for clamping the electrode. The above-mentioned first belt-joining mechanism 7 and the second belt-joining mechanism 8 ensure that the electrode maintains a stable path and tension during the transmission process. This stability is crucial to ensure the accuracy of the subsequent laminating and measurement processes.

[0037] See also Figure 2 In one embodiment, an iron removal mechanism 9 for double-sided iron removal of the pole piece is provided between the first connecting mechanism 7 and the laminating mechanism 3, and the pole piece passes through the first connecting mechanism 7, the iron removal mechanism 9, and the laminating mechanism 3 in sequence. Specifically, the iron removal mechanism 9 includes two magnetic bars arranged opposite to each other, and the pole piece passes between the two magnetic bars. During the production process of the pole piece, iron impurities are easily attached to its surface. These impurities may affect the adhesion and lamination effect between the foil and the pole piece, such as causing defects, bubbles or unevenness on the pole piece after lamination, thereby increasing the defective product rate. By removing these impurities through the above-mentioned iron removal mechanism 9, it can be ensured that the foil can be evenly and tightly laminated on the surface of the pole piece, thereby improving the quality and performance of the final product.

[0038] See also Figure 2In one embodiment, a first tension adjusting mechanism 10 for adjusting the tension of the electrode is provided between the first tape connection mechanism 7 and the laminating mechanism 3, and a second tension adjusting mechanism 11 for adjusting the tension of the electrode after the foil is coated is provided between the laminating mechanism 3 and the second tape connection mechanism 8. During operation, the electrode passes through the first tape connection mechanism 7, the first tension adjusting mechanism 10, the laminating mechanism 3, the second tension adjusting mechanism 11, and the second tape connection mechanism 8 in sequence. Through the first tension adjusting mechanism 10 and the second tension adjusting mechanism 11, the tension of the electrode during the laminating process can be accurately controlled to ensure that the electrode maintains a stable tension state during the transmission process, thereby avoiding problems such as wrinkles, stretching or relaxation of the electrode during the laminating process, which is crucial to ensure the performance and appearance quality of the final product.

[0039] See also Figure 2 In one embodiment, a third tension adjusting mechanism 12 for adjusting the tension of the PET film attached to the foil is provided between the PET unwinding mechanism 2 and the laminating mechanism 3, and a fourth tension adjusting mechanism 13 for adjusting the tension of the PET film after the foil is peeled off is provided between the laminating mechanism 3 and the PET winding mechanism 4. During operation, the PET film attached to the foil passes through the third tension adjusting mechanism 12 and the laminating mechanism 3 in sequence, and the PET film after the foil is peeled off passes through the fourth tension adjusting mechanism 13 and is wound on the PET winding mechanism 4. The third tension adjusting mechanism 12 and the fourth tension adjusting mechanism 13 can ensure that the PET film maintains a stable tension state during the laminating process, avoid excessive relaxation or excessive stretching of the film material, and thus ensure the laminating quality; in addition, it can also ensure that the PET film operates under a suitable tension, prolong the service life of the PET film, and reduce the maintenance cost of the laminating mechanism 3.

[0040] See also Figure 2 In one embodiment, a peeling angle adjustment roller 14 for adjusting the peeling angle of the PET film is provided between the laminating mechanism 3 and the PET winding mechanism 4. The peeling angle adjustment roller 14 can adjust the position in the horizontal and vertical directions. The PET film after the foil is peeled passes through the peeling angle adjustment roller 14 and is wound in the PET winding mechanism 4. The peeling angle adjustment roller 14 can adjust the peeling angle of the PET film by adjusting the position in the horizontal and vertical directions to adapt to the changes in different widths and different adhesion of materials.

[0041] See also Figure 2In one embodiment, an electrostatic eliminator 15 is provided between the laminating mechanism 3 and the PET winding mechanism 4 for eliminating static electricity on the PET film after the foil is peeled off. The PET film after the foil is peeled off passes through the electrostatic eliminator and is then rolled up on the PET winding mechanism 4. Since the PET film after the foil is peeled off may carry electrostatic charge, this may cause the film to absorb dust, impurities or curl during winding or subsequent processing. The electrostatic eliminator 15 can effectively neutralize the electrostatic charge on the PET film, thus avoiding these problems.

[0042] See also Figure 2 In one embodiment, the electrode lamination test machine further includes a heat insulation film unwinding mechanism 16 for supplying a heat insulation film, and the heat insulation film unwinding mechanism 16 is arranged above the product winding mechanism 6. The heat insulation film supplied by the heat insulation film unwinding mechanism 16 is located on one side of the electrode foil and is wound up on the product winding mechanism 6 together with the electrode foil-coated electrode. In order to prevent the upper and lower layers of the coil from affecting each other during high-speed production, the heat insulation film unwinding mechanism 16 is arranged above the product winding mechanism 6, which can effectively isolate the heat transfer between the upper and lower layers of the product.

[0043] See also Figure 3 In one embodiment, if the electrode piece needs to be double-sidedly laminated with foil, a PET unwinding mechanism 2 and a PET rewinding mechanism 4 can be added below. The PET films of the attached foil supplied by the two PET unwinding mechanisms 2 are respectively located on the two sides of the electrode piece and enter the laminating mechanism 3 for pressure lamination at the same time, so that the electrode piece can be laminated with foil at the same time, which can improve production efficiency. Of course, it is also possible not to add the PET unwinding mechanism 2 and the PET rewinding mechanism 4. After the electrode piece is laminated with foil on one side, the electrode piece with single-sided foil is taken from the product rewinding mechanism 6 to the electrode piece unwinding mechanism 1 on the reverse side to complete the action of laminating the foil on the other side. In this way, the electrode piece can be laminated with foil on both sides, and the equipment cost can be further reduced.

[0044] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the claims attached to the utility model.

[0045] The above is an exemplary description of the utility model patent in conjunction with the accompanying drawings. It is obvious that the implementation of the utility model patent is not limited to the above-mentioned method. As long as various improvements are made by adopting the method concept and technical solution of the utility model patent, or the concept and technical solution of the utility model patent are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A pole piece lamination test machine, characterized in that: It includes an electrode unwinding mechanism for supplying an electrode, an attached PET unwinding mechanism for supplying a PET film with an attached foil, a laminating mechanism for laminating the foil attached to the PET film on the electrode, a PET winding mechanism for recovering the PET film after the foil is peeled off, a thickness measuring mechanism for measuring the thickness of the electrode after the foil is coated, and a product winding mechanism for recovering the electrode after the foil is coated. The electrode unwinding mechanism and the attached PET unwinding mechanism are arranged on one side of the laminating mechanism, the PET winding mechanism, the thickness measuring mechanism and the product winding mechanism are arranged on the other side of the laminating mechanism, and the thickness measuring mechanism is arranged between the laminating mechanism and the product winding mechanism.

2. The pole piece lamination testing machine according to claim 1, characterized in that: A first tape connection mechanism is provided between the electrode unwinding mechanism and the laminating mechanism, and a second tape connection mechanism is provided between the thickness measuring mechanism and the laminating mechanism. The electrode passes through the first tape connection mechanism, the laminating mechanism, the second tape connection mechanism, and the thickness measuring mechanism in sequence.

3. The pole piece lamination testing machine according to claim 2, characterized in that: An iron removal mechanism for removing iron from both sides of the pole piece is provided between the first connecting mechanism and the laminating mechanism, and the pole piece passes through the first connecting mechanism, the iron removal mechanism and the laminating mechanism in sequence.

4. The pole piece lamination testing machine according to claim 3, characterized in that: The iron removal mechanism comprises two magnetic bars arranged opposite to each other, and the pole piece passes between the two magnetic bars.

5. The pole piece lamination testing machine according to claim 2, characterized in that: A first tension adjustment mechanism for adjusting the tension of the electrode piece is arranged between the first tape connection mechanism and the laminating mechanism, and a second tension adjustment mechanism for adjusting the tension of the electrode piece after the foil is coated is arranged between the laminating mechanism and the second tape connection mechanism. The electrode piece passes through the first tape connection mechanism, the first tension adjustment mechanism, the laminating mechanism, the second tension adjustment mechanism, and the second tape connection mechanism in sequence.

6. The pole piece lamination testing machine according to claim 1, characterized in that: A third tension adjustment mechanism for adjusting the tension of the PET film attached to the foil is provided between the attached PET unwinding mechanism and the laminating mechanism. The PET film attached to the foil passes through the third tension adjustment mechanism and the laminating mechanism in sequence.

7. The pole piece lamination testing machine according to claim 1, characterized in that: A peeling angle adjustment roller for adjusting the peeling angle of the PET film is arranged between the laminating mechanism and the PET winding mechanism, and the peeling angle adjustment roller can adjust the position in the horizontal and vertical directions.

8. The pole piece lamination testing machine according to claim 1, characterized in that: A fourth tension adjusting mechanism for adjusting the tension of the PET film after the foil is peeled off is provided between the laminating mechanism and the PET winding mechanism. The PET film after the foil is peeled off passes through the fourth tension adjusting mechanism and is then wound on the PET winding mechanism.

9. The pole piece lamination testing machine according to claim 1, characterized in that: An anti-static mechanism for eliminating static electricity on the PET film after the foil is peeled off is arranged between the laminating mechanism and the PET winding mechanism. The PET film after the foil is peeled off passes through the anti-static machine and is then rolled up on the PET winding mechanism.

10. The pole piece lamination testing machine according to claim 1, characterized in that: It also includes an insulation film unwinding mechanism for supplying insulation film, wherein the insulation film unwinding mechanism is arranged above the product winding mechanism, and the insulation film supplied by the insulation film unwinding mechanism is located on one side of the pole piece foil and is wound up on the product winding mechanism at the same time as the pole piece after the foil is coated.

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