Cutting and stacking integrated system

Abstract

The utility model relates to the technical field of battery production, and particularly discloses a cutting and stacking integrated system which comprises a pole piece diaphragm composite assembly section, a single-sided pole piece forming section, a double-sided pole piece forming section and a stacking platform, the pole piece diaphragm composite assembly section, the single-sided pole piece forming section and the double-sided pole piece forming section are distributed side by side at intervals; and the pole piece diaphragm composite assembly section, the single-sided pole piece forming section and the double-sided pole piece forming section are all connected to the lamination platform. According to the cutting and stacking integrated system provided by the scheme, each working section is directly connected to the stacking platform, the unwinding, compounding and stacking processes of splitting and integrating can be realized, the coordination difficulty of synchronous production of materials is reduced, the transfer frequency of the materials is reduced, and thus the generation efficiency is improved; meanwhile, the first pole piece and the diaphragm can be compounded by the pole piece and diaphragm compound assembly section, so that hot air is quickly removed to enable the material pieces to be compact, and the risk of secondary displacement of the material pieces in the lamination process is reduced.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing technology, and in particular to a cutting and stacking integrated system. Background Technology

[0002] The production process of electrode cells involves multiple steps, including cutting positive electrode sheets, cutting negative electrode sheets, cutting separators, stacking, and hot pressing. Among these steps, because stacking requires combining multiple layers of sheets of different materials and types, secondary displacement of the sheets in different layers can occur, affecting the stacking effect.

[0003] Meanwhile, the production system has multiple unwinding stations, such as positive electrode unwinding, negative electrode unwinding, and diaphragm unwinding, and the materials need to be transferred multiple times during the process; therefore, it is difficult to coordinate the production pace of different materials in the existing production system. Utility Model Content

[0004] In view of this, the purpose of this application is to provide a cutting and stacking integrated system to solve some or all of the above-mentioned problems.

[0005] To achieve the above technical objectives, this application provides a cutting and stacking integrated system, comprising: an electrode-diaphragm composite assembly section, a single-sided electrode forming section, a double-sided electrode forming section, and a stacking platform;

[0006] The electrode-diaphragm composite assembly section, the single-sided electrode forming section, and the double-sided electrode forming section are arranged side by side at intervals.

[0007] The electrode-diaphragm composite assembly section, the single-sided electrode forming section, and the double-sided electrode forming section are all connected to the stacking platform.

[0008] Furthermore, the electrode-diaphragm composite assembly section includes: a first electrode unwinding mechanism, a first electrode forming mechanism, a diaphragm unwinding mechanism, and a composite mechanism;

[0009] The first electrode unwinding mechanism unwinds the first electrode;

[0010] The first electrode forming mechanism is used to form the first electrode.

[0011] The diaphragm unwinding mechanism is used to unwind the upper and lower diaphragms; the first electrode unwinding mechanism, the first electrode forming mechanism, the diaphragm unwinding mechanism, and the composite mechanism are arranged in a straight line along the conveying direction.

[0012] Furthermore, the composite mechanism includes: a primary composite component;

[0013] The primary composite assembly is used to perform a primary hot pressing of the first electrode and the upper diaphragm.

[0014] Furthermore, the composite mechanism includes: a secondary composite component;

[0015] The secondary composite component is used to perform a secondary hot-pressing of the material and the lower diaphragm after the primary hot pressing.

[0016] Furthermore, the electrode-diaphragm composite assembly section also includes: a first electrode correction mechanism, a composite defect detection mechanism, and a composite cutting and positioning mechanism;

[0017] The first electrode unwinding mechanism, the first electrode forming mechanism, the first electrode correction mechanism, the diaphragm unwinding mechanism, the composite mechanism, the composite defect detection mechanism, and the composite cutting and positioning mechanism are arranged sequentially along the conveying direction.

[0018] Furthermore, the single-sided electrode forming section includes: a single-sided electrode unwinding mechanism, a single-sided electrode cutting mechanism, and a single-sided electrode forming mechanism;

[0019] The single-sided electrode unwinding mechanism, the single-sided electrode cutting mechanism, and the single-sided electrode forming mechanism are arranged in a straight line along the conveying direction.

[0020] Furthermore, the double-sided electrode forming section includes: a double-sided electrode unwinding mechanism, a double-sided electrode forming mechanism, and a conveying mechanism;

[0021] The double-sided electrode unwinding mechanism, the double-sided electrode forming mechanism, and the conveying mechanism are arranged in a straight line along the conveying direction.

[0022] Furthermore, the conveying mechanism is a magnetic levitation conveyor belt.

[0023] Furthermore, it also includes: a hot pressing platform;

[0024] The hot pressing platform is located behind the stacking platform along the conveying direction.

[0025] Furthermore, a first maintenance channel is provided between the single-sided electrode forming section and the double-sided electrode forming section;

[0026] A second maintenance passage is provided on the side of the stacking platform.

[0027] As can be seen from the above technical solutions, this application provides a cutting and stacking integrated system, including: an electrode-diaphragm composite assembly section, a single-sided electrode forming section, a double-sided electrode forming section, and a stacking platform; the electrode-diaphragm composite assembly section, the single-sided electrode forming section, and the double-sided electrode forming section are arranged side by side with intervals; the electrode-diaphragm composite assembly section, the single-sided electrode forming section, and the double-sided electrode forming section are all connected to the stacking platform.

[0028] In the integrated cutting and stacking system provided in this solution, each section is directly connected to the stacking platform, enabling the unwinding, lamination, and stacking processes to be integrated, reducing the coordination difficulty of synchronous material production and reducing the number of material transfers, thereby improving production efficiency; at the same time, the electrode-diaphragm composite assembly section can combine the first electrode with the diaphragm, achieving rapid removal of hot air to make the sheets denser, reducing the risk of secondary displacement of the sheets during the stacking process. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the layout structure of a cutting and stacking integrated system provided in an embodiment of this application;

[0031] In the picture:

[0032] 10. Electrode and diaphragm composite assembly section; 11. First electrode unwinding mechanism; 12. First electrode forming mechanism; 13. First electrode correction mechanism; 14. Diaphragm unwinding mechanism; 15. Composite mechanism; 151. Primary composite assembly; 152. Secondary composite assembly; 16. Composite defect detection mechanism; 17. Composite cutting and positioning mechanism; 171. Diaphragm bottom cutting assembly; 172. Buffer feeding assembly; 18. Transfer robot;

[0033] 20. Single-sided electrode forming section; 21. Single-sided electrode unwinding mechanism; 22. Single-sided electrode cutting mechanism; 23. Single-sided electrode forming mechanism; 24. Single-sided electrode flipping mechanism; 25. Laser marking mechanism; 26. Second transfer robot arm;

[0034] 30. Double-sided electrode forming section; 31. Double-sided electrode unwinding mechanism; 32. Double-sided electrode forming mechanism; 33. Third transfer robot; 34. Conveying mechanism;

[0035] 40. Stacking platform; 41. Stacking robot; 42. Stacking correction assembly;

[0036] 50. Hot pressing platform; 51. Appearance inspection components;

[0037] 61. First maintenance access; 62. Second maintenance access; 63. Third maintenance access; 64. Fourth maintenance access;

[0038] 70. Material unloading platform;

[0039] 80. Feeding channel;

[0040] X-axis direction: first direction; Y-axis direction: second direction. Detailed Implementation

[0041] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments in this application specification, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection claimed in this application.

[0042] In the description of the embodiments of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0043] In the description of the embodiments of this application, 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 a fixed connection, a replaceable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0044] Please see Figure 1 The present application provides a cutting and stacking integrated system, including: an electrode-diaphragm composite assembly section 10, a single-sided electrode forming section 20, a double-sided electrode forming section 30, and a stacking platform 40.

[0045] The three sections—electrode-diaphragm composite assembly section 10, single-sided electrode forming section 20, and double-sided electrode forming section 30—are arranged side-by-side and spaced apart; specifically, these three sections can be arranged in parallel and spaced apart along a second direction; the second direction is... Figure 1 The Y-axis direction. The second direction is perpendicular to the first direction; the first direction is... Figure 1 The X-axis direction in the diagram also represents the conveying direction of materials such as electrodes and diaphragms in the process section. For ease of explanation, the positive direction of the X-axis will be referred to as the rear, and the negative direction of the X-axis will be referred to as the front.

[0046] The electrode-diaphragm composite assembly section 10, the single-sided electrode forming section 20, and the double-sided electrode forming section 30 are all connected to the stacking platform 40, so that the materials of the three can be transferred to the stacking platform 40 for stacking, reducing the number of material transfers and thus improving production efficiency.

[0047] Specifically, in this embodiment, the electrode-diaphragm composite assembly section 10 is used to unwind the first electrode and the diaphragm, and then composite the first electrode and the diaphragm, so that the first electrode and the diaphragm are quickly bonded together without secondary displacement. The single-sided electrode forming section 20 is used to unwind the single-sided electrode and form the single-sided electrode; the double-sided electrode forming section 30 is used to unwind the double-sided electrode and form the double-sided electrode. The single-sided electrode and the double-sided electrode can both be negative electrodes, and the first electrode is the positive electrode. In actual production, the electrodes of the first electrode and the single-sided electrode are opposite, while the electrodes of the single-sided electrode and the double-sided electrode are the same.

[0048] In a more specific embodiment, the electrode-diaphragm composite assembly section 10 includes: a first electrode unwinding mechanism 11, a first electrode forming mechanism 12, a diaphragm unwinding mechanism 14, and a composite mechanism 15. The first electrode unwinding mechanism 11, the first electrode forming mechanism 12, the diaphragm unwinding mechanism 14, and the composite mechanism 15 are arranged in a straight line along the conveying direction. In this embodiment, the composite mechanism 15 can be located in front of the diaphragm unwinding mechanism 14, or it can be located behind the diaphragm unwinding mechanism 14. The diaphragm unwinding mechanism 14 can also be located within the composite mechanism 15.

[0049] The first electrode unwinding mechanism 11 is used to unwind the first electrode, which is then formed by the first electrode forming mechanism 12. The first electrode forming mechanism 12 can form the first electrode by one or more of the following steps: electrode cutting, electrode compaction, and electrode dust removal. All of the above steps can be performed by equipment in the prior art, and therefore will not be described in detail in this embodiment.

[0050] The diaphragm unwinding mechanism 14 is used to unwind the diaphragm, and then the diaphragm and the first electrode are conveyed to the composite mechanism 15 for composite, and then conveyed to the stacking platform 40.

[0051] In one embodiment, the diaphragm unwinding mechanism 14 unwinds an upper diaphragm and a lower diaphragm.

[0052] The composite mechanism 15 includes a primary composite component 151; the primary composite component 151 is used to perform a primary hot-pressing of the first electrode and the upper separator. By performing a primary hot-pressing of the first electrode and the upper separator, the active material in the first electrode can be better attached to the current collector, improving the electronic conductivity of the local area of ​​the first electrode. Simultaneously, the primary hot-pressing makes the bonding structure between the first electrode and the upper separator more compact, reducing internal voids and contact resistance.

[0053] Furthermore, the composite mechanism 15 includes: a secondary composite component 152; the secondary composite component 152 is used to perform a secondary hot pressing on the material and the lower diaphragm after the primary hot pressing.

[0054] The material after the first hot pressing refers to the upper diaphragm and the first electrode after the first hot pressing. Both the first and second hot pressing can be partial or full hot pressing. In the embodiments provided in this application, the first and second hot pressing are preferably partial hot pressing, which is more efficient and has a better bonding effect.

[0055] Specifically, the diaphragm unwinding mechanism 14 is positioned between the primary composite assembly 151 and the secondary composite assembly 152. During application, the diaphragm unwinding mechanism 14 first releases the upper diaphragm to the primary composite assembly 151 for primary hot pressing, then releases the lower diaphragm, and introduces both the material after primary hot pressing and the lower diaphragm into the secondary composite assembly 152 for secondary hot pressing. Through primary and secondary hot pressing, the first electrode and the diaphragm can be tightly bonded, preventing loosening or delamination between them, thereby avoiding secondary displacement of the sheet material during subsequent stacking.

[0056] In a more specific embodiment, the electrode-diaphragm composite assembly section 10 further includes: a first electrode correction mechanism 13, a composite defect detection mechanism 16, and a composite cutting and positioning mechanism 17; the first electrode unwinding mechanism 11, the first electrode forming mechanism 12, the first electrode correction mechanism 13, the diaphragm unwinding mechanism 14, the composite mechanism 15, the composite defect detection mechanism 16, and the composite cutting and positioning mechanism 17 are arranged in a straight line along the conveying direction.

[0057] The first electrode correction mechanism 13 is disposed in the first electrode forming mechanism 12 and is used to perform CCD positioning correction and AT detection on the formed first electrode.

[0058] The composite defect inspection agency 16 is used to inspect the finished product after the first electrode and the diaphragm are laminated, in order to detect defective products such as exposed foil, coating stains, damage or scratches, material loss, unqualified electrode tab length, and unqualified adhesive tape position. The composite defect inspection agency 16 can use inspection methods such as visual inspection and X-ray inspection.

[0059] The composite cutting and positioning mechanism 17 may be equipped with a diaphragm bottom cutting component 171 and a buffer feeding component 172 in front of it. The diaphragm bottom cutting component 171 is used to cut the bottom of the composite diaphragm to remove the excess part of the bottom of the diaphragm, and the cutting method can be laser cutting. The buffer feeding component 172 can temporarily store the cut material. The composite cutting and positioning mechanism 17 may be equipped with a steel belt conveyor component, a dust removal component, and a detection component. The steel belt conveyor component transports the material through the steel belt, so that the material can be cut directly on the steel belt. The dust removal component is used to remove dust from the steel belt and the material. The detection component is used to perform electrode positioning and SAS (Surface Analysis System) detection on the cut material. Among them, chassis positioning refers to ensuring that the diaphragm can completely cover the first electrode. SAS detection is used to detect the composition and chemical state of the surface active material of the first electrode, as well as the chemical structure changes of the coating or treatment on the diaphragm surface.

[0060] After being cut, positioned, and inspected by the composite cutting and positioning mechanism 17, NG products enter the NG box, and finished products are transferred to the stacking platform 40 by the transfer robot 18.

[0061] In one embodiment, the single-sided electrode forming section 20 includes: a single-sided electrode unwinding mechanism 21, a single-sided electrode cutting mechanism 22, and a single-sided electrode forming mechanism 23; the single-sided electrode unwinding mechanism 21, the single-sided electrode cutting mechanism 22, and the single-sided electrode forming mechanism 23 are arranged in a straight line along the conveying direction.

[0062] The single-sided electrode unwinding mechanism 21 is used to unwind the single-sided electrode. The single-sided electrode then enters the single-sided electrode cutting mechanism 22 for cutting. After sheet material inspection and correction on the single-sided electrode cutting mechanism 22, it enters the single-sided electrode forming mechanism 23 for forming. In this embodiment, the cutting and forming processes of the incoming single-sided electrode can be completed using existing equipment, and therefore will not be described in detail in this embodiment.

[0063] Behind the single-sided electrode forming mechanism 23, a single-sided electrode flipping mechanism 24, a laser marking mechanism 25, and a second transfer robot 26 can be arranged in sequence; the single-sided electrode flipping mechanism 24 is used to flip the single-sided electrode; the laser marking mechanism 25 is used to mark on the single-sided electrode; the second transfer robot 26 is used to transfer the single-sided electrode to the stacking platform 40.

[0064] In one embodiment, the double-sided electrode forming section 30 includes: a double-sided electrode unwinding mechanism 31, a double-sided electrode forming mechanism 32, and a conveying mechanism 34; the double-sided electrode unwinding mechanism 31, the double-sided electrode forming mechanism 32, and the conveying mechanism 34 are arranged in a straight line along the conveying direction.

[0065] The double-sided electrode unwinding mechanism 31 is used to unwind double-sided electrodes; the electrodes of the double-sided electrodes are the same as those of the single-sided electrodes. The double-sided electrode forming mechanism 32 is used to cut and form the unwound double-sided electrodes. The double-sided electrode forming mechanism 32 can also perform double-sided dust removal and CT inspection on the double-sided electrodes. Afterwards, a third transfer robot 33 transfers the double-sided electrodes to the conveying mechanism 34, and then the conveying mechanism 34 transfers them to the stacking platform 40.

[0066] Optionally, the conveying mechanism 34 is a magnetic levitation conveyor belt; using a magnetic levitation conveyor belt can reduce the impact of dust generated by structural wear in the conveying structure on the electrode sheet, and also helps to achieve high-precision positioning of the electrode sheet.

[0067] In one embodiment, the stacking platform 40 is equipped with a stacking robot 41 and a stacking correction component 42. Through the primary and secondary composite processes of the composite mechanism 15, the material is less likely to undergo secondary displacement during the stacking process, and the expansion heat of the sheets is removed during the composite process, allowing the sheets to adhere more tightly during the stacking process.

[0068] In one embodiment, the system further includes a hot-pressing platform 50, which is positioned behind the stacking platform 40 along the conveying direction. The hot-pressing platform 50 is used to hot-press the stacked material (cell) for subsequent casing insertion; the hot-pressed material is then conveyed to the unloading platform 70 for unloading. The hot-pressing platform 50 is equipped with an appearance inspection component 51, capable of performing appearance inspection on the material before and after hot-pressing.

[0069] In one embodiment, a first maintenance channel 61 is provided between the single-sided electrode forming section 20 and the double-sided electrode forming section 30; a second maintenance channel 62 is provided on the side of the stacking platform 40.

[0070] Specifically, the second maintenance channel 62 can be located in front of the stacking platform 40. A third maintenance channel 63 can also be located beside the stacking platform 40 and the hot pressing platform 50 along the Y-axis. A fourth maintenance channel 64 can be located beside the magnetic levitation conveyor belt, that is, beside the conveying mechanism 34.

[0071] In the embodiments provided in this application, the electrode-diaphragm composite assembly section 10 is composed of a double-sided electrode forming section 30 and a single-sided electrode forming section 20 along the Y direction; a feeding channel 80 can be provided between the electrode-diaphragm composite assembly section 10 and the double-sided electrode forming section 30, which can be used for mold trolley to pass through for AGV (Automated Guided Vehicle) feeding and diaphragm feeding.

[0072] In this embodiment, the three sections are closely arranged with the stacking platform 40 to achieve a high energy density production layout structure; in addition, multiple materials can be produced and transported simultaneously during the production process, improving the production efficiency of the battery, and the maintenance channels mentioned above facilitate the inspection and maintenance by the staff.

[0073] The above are merely preferred embodiments of this application and are not intended to limit the present invention. Although the present application has been described in detail with reference to examples, those skilled in the art can still modify the technical solutions described in the foregoing examples or make equivalent substitutions for some of the technical features. However, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A cutting and stacking integrated system, characterized in that, include: The electrode-diaphragm composite assembly section (10), the single-sided electrode forming section (20), the double-sided electrode forming section (30), and the stacking platform (40) are all included. The electrode-diaphragm composite assembly section (10), the single-sided electrode forming section (20), and the double-sided electrode forming section (30) are arranged side by side at intervals; The electrode-diaphragm composite assembly section (10), the single-sided electrode forming section (20), and the double-sided electrode forming section (30) are all connected to the stacking platform (40).

2. The integrated cutting and stacking system according to claim 1, characterized in that, The electrode-diaphragm composite assembly section (10) includes: a first electrode unwinding mechanism (11), a first electrode forming mechanism (12), a diaphragm unwinding mechanism (14), and a composite mechanism (15); The first electrode unwinding mechanism (11) is used to unwind the first electrode; The first electrode forming mechanism (12) is used to form the first electrode; The diaphragm unwinding mechanism (14) is used to unwind the diaphragm; The first electrode unwinding mechanism (11), the first electrode forming mechanism (12), the diaphragm unwinding mechanism (14), and the composite mechanism (15) are arranged in a straight line along the conveying direction.

3. The integrated cutting and stacking system according to claim 2, characterized in that, The composite mechanism (15) includes: a primary composite component (151); The diaphragm unwinding mechanism (14) is used to unwind the upper diaphragm and the lower diaphragm; The primary composite component (151) is used to perform a primary hot pressing of the first electrode and the upper diaphragm.

4. The integrated cutting and stacking system according to claim 3, characterized in that, The composite mechanism (15) includes: a secondary composite component (152); The secondary composite component (152) is used to perform a secondary hot-pressing of the material after the first hot pressing with the lower diaphragm.

5. The integrated cutting and stacking system according to claim 2, characterized in that, The electrode-diaphragm composite assembly section (10) further includes: a first electrode correction mechanism (13), a composite defect detection mechanism (16), and a composite cutting and positioning mechanism (17); The first electrode unwinding mechanism (11), the first electrode forming mechanism (12), the first electrode correction mechanism (13), the diaphragm unwinding mechanism (14), the composite mechanism (15), the composite defect detection mechanism (16), and the composite cutting and positioning mechanism (17) are arranged in a straight line along the conveying direction.

6. The integrated cutting and stacking system according to claim 1, characterized in that, The single-sided electrode forming section (20) includes: a single-sided electrode unwinding mechanism (21), a single-sided electrode cutting mechanism (22), and a single-sided electrode forming mechanism (23); The single-sided electrode unwinding mechanism (21), the single-sided electrode cutting mechanism (22), and the single-sided electrode forming mechanism (23) are arranged in a straight line along the conveying direction.

7. The integrated cutting and stacking system according to claim 1, characterized in that, The double-sided electrode forming section (30) includes: a double-sided electrode unwinding mechanism (31), a double-sided electrode forming mechanism (32), and a conveying mechanism (34); The double-sided electrode unwinding mechanism (31), the double-sided electrode forming mechanism (32), and the conveying mechanism (34) are arranged in a straight line along the conveying direction.

8. The integrated cutting and stacking system according to claim 7, characterized in that, The conveying mechanism (34) is a magnetic levitation conveyor belt.

9. The integrated cutting and stacking system according to claim 1, characterized in that, Also includes: Hot press platform (50); The hot pressing platform (50) is located behind the stacking platform (40) along the conveying direction.

10. The integrated cutting and stacking system according to claim 1, characterized in that, A first maintenance channel (61) is provided between the single-sided electrode forming section (20) and the double-sided electrode forming section (30); A second maintenance passage (62) is provided on the side of the stacking platform (40).

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