Composite device
By introducing a repair mechanism into the composite device, the thermal composite defects between the solid electrolyte membrane and the electrode sheet are detected and repaired, the high cost and low efficiency problems caused by the defects in the prior art are solved, and efficient and low-cost battery electrode sheet production is achieved.
Patent Information
- Application Number
- CN202421949391.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-13
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-08-13
AI Technical Summary
In the prior art, defects are easily generated during thermal recombination of solid electrolyte membranes and electrode sheets, such as local cracks or local deletion, which affects battery capacity, life and safety, and has problems with high manufacturing costs.
A composite device is designed, including a repair mechanism, which can detect and repair defects of composite electrode sheets. By filling and leveling the compensation substance, it is combined with a drying mechanism to ensure that the defective materials are consistent with the electrolyte membrane, improving production continuity and reducing scrapping rate.
It improves the production continuity of composite pole sheets, reduces the scrap rate and manufacturing cost of composite pole sheets, and improves the overall performance and production efficiency of the battery.
Smart Images
Figure CN223079158U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of batteries, in particular to a composite device. Background Art
[0002] In the new energy battery manufacturing industry, the traditional wet positive and negative electrode sheets adopt the coating method, which is to mix the positive and negative active materials with conductive agents and binders and coat them on the corresponding foil materials respectively; the solvent content accounts for 30% to 60% of the total weight of the electrode sheet, and drying a large amount of solvent requires a large amount of energy, resulting in high process costs, and using a large amount of solvent will cause environmental pollution. With the development of battery production technology, the dry electrode technology has emerged. The dry electrode technology does not require solvent drying and recovery steps, and the manufacturing process is simpler, faster, more economical, and more environmentally friendly.
[0003] The dry electrode sheet technology can make a solid electrolyte membrane made of active materials and an electrode sheet composite without using a solvent, so as to make a battery composite electrode sheet, omitting the process of drying the electrode sheet made by the coating method, saving a large amount of energy, and reducing the process cost.
[0004] Usually, a composite device is used to realize the composite of the solid electrolyte membrane and the electrode sheet. In the prior art, during the thermal composite process of the solid electrolyte membrane and the electrode sheet, defects may occur, such as local cracks or local lack of solid electrolyte, which will affect the battery capacity, life, safety, etc. At present, the electrode sheets with thermal composite defects are scrapped, resulting in high manufacturing costs of qualified electrode sheets and high manufacturing costs of batteries.
[0005] Therefore, there is an urgent need for a composite device to solve the above problems. Summary of the Utility Model
[0006] The purpose of the utility model is to provide a composite device, which compensates for the composite electrode sheets with thermal composite defects on the production line of the composite of the solid electrolyte membrane and the electrode sheet, and completes the preparation of the composite electrode sheets, improves the production continuity, reduces the scrap rate of the composite electrode sheets and reduces the manufacturing cost.
[0007] To achieve the above purpose, the following technical solutions are provided:
[0008] A composite device, comprising:
[0009] A first unwinding mechanism configured to unwind an electrode sheet;
[0010] A second unwinding mechanism configured to unwind a solid electrolyte membrane;
[0011] A first composite mechanism configured to thermally composite the electrode sheet and the solid electrolyte membrane to form a composite electrode sheet; and
[0012] Repair mechanism, configured to detect and repair defects of the composite pole piece.
[0013] As an alternative, the repair mechanism includes:
[0014] Detection piece, configured to detect the type of the defect and obtain the position where the defect is located;
[0015] Repair piece, communicatively connected to the detection piece, and the repair piece is used to repair the defect according to the defect type and the position where the defect is located.
[0016] As an alternative, the repair mechanism further includes:
[0017] Moving piece, communicatively connected to the detection piece, the repair piece is connected to the output end of the moving piece, and the moving piece can drive the repair piece to move to correspond to the position of the defect.
[0018] As an alternative, the composite device further includes:
[0019] Leveling mechanism, along the conveying direction of the composite pole piece, the leveling mechanism is arranged downstream of the repair mechanism, and the leveling mechanism is configured to level the compensation material supplemented at the defect of the composite pole piece.
[0020] As an alternative, the leveling mechanism includes:
[0021] Flattening piece;
[0022] Flattening driving piece, the flattening driving piece is configured to drive the flattening piece to apply pressure to the composite pole piece so that the flattening piece flattens the compensation material increased at the defect of the composite pole piece.
[0023] As an alternative, the composite device further includes:
[0024] Scraper, the scraper is arranged between the repair mechanism and the leveling mechanism, and the scraper is configured to scrape off the excess compensation material at the defect of the composite pole piece.
[0025] As an alternative, the composite device further includes:
[0026] Drying mechanism, the drying mechanism is configured to dry the compensation material supplemented at the defect.
[0027] As an alternative, the drying mechanism includes a hot air gun and / or an infrared lamp.
[0028] As an alternative, the composite device further includes:
[0029] The second composite mechanism is arranged downstream of the repair mechanism, and the second composite mechanism is used for thermally compounding the composite pole piece.
[0030] As an optional solution, the number of the second unwinding mechanisms is two, and the solid electrolyte membranes unwound by the two second unwinding mechanisms are respectively located on both sides of the pole piece;
[0031] The number of the repair mechanisms is also two, and the two repair mechanisms respectively detect and compensate for the defects on both sides of the composite pole piece.
[0032] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0033] The composite device provided by the present utility model includes a repair mechanism, and the repair mechanism is used for detecting and repairing the defects of the composite pole piece. In the production line of compounding the solid electrolyte membrane and the pole piece, the repair mechanism compensates for the composite pole piece with thermal compounding defects, and completes the preparation of the composite pole piece, improves the continuity of production, reduces the rejection rate of the composite pole piece and reduces the manufacturing cost. Description of the Drawings
[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the description of the embodiments of the present utility model. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the content of the embodiments of the present utility model and these drawings.
[0035] Figure 1 It is a schematic structural diagram of the composite device provided by the embodiment of the present utility model.
[0036] Reference Signs:
[0037] 100, composite device;
[0038] 10, first unwinding mechanism;
[0039] 20, second unwinding mechanism;
[0040] 30, first composite mechanism;
[0041] 40, repair mechanism; 41, moving member; 42, repair member; 43, detecting member;
[0042] 50, leveling mechanism; 51, flattening member; 52, flattening driving member;
[0043] 60, scraper;
[0044] 70, drying mechanism;
[0045] 80. Second composite mechanism;
[0046] 90. Rewinding mechanism;
[0047] 200. Electrode tab; 300. Solid electrolyte membrane; 400. Composite electrode tab. Detailed implementation manners
[0048] To make the above objects, features, and advantages of the present application more obvious and understandable, the following describes the detailed implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.
[0049] In the description of the present application, it should be understood that if terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present application.
[0050] In addition, if terms such as "first" and "second" appear, these terms are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.
[0051] In the present application, unless otherwise clearly defined and limited, if terms such as "installation", "connection", "connection", "fixation" appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.
[0052] In this application, unless otherwise clearly specified and defined, if there is a description such as a first feature being "on" or "under" a second feature, the meaning can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature is at a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature is at a lower horizontal height than the second feature.
[0053] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.
[0054] As Figure 1 As shown, this embodiment provides a composite device 100. The composite device 100 includes a first unwinding mechanism 10, a second unwinding mechanism 20 and a first composite mechanism 30. The first unwinding mechanism 10 is used to unwind the electrode sheet 200; the second unwinding mechanism 20 is used to unwind the solid electrolyte membrane 300; the first composite mechanism 30 is used to thermally composite the electrode sheet 200 and the solid electrolyte membrane 300 to form a composite electrode sheet 400. Among them, the first composite mechanism 30 can be a set of thermal composite rollers. By using the composite device 100 to composite the electrode sheet 200 and the solid electrolyte membrane 300, the battery composite electrode sheet 400 is made, saving the drying process of making the electrode sheet 200 by the coating method, saving a large amount of energy and reducing the process cost.
[0055] Optionally, the number of the second unwinding mechanisms 20 is two, and the solid electrolyte membranes 300 unwound by the two second unwinding mechanisms 20 are respectively located on both sides of the electrode sheet 200, realizing double-sided composite of the solid electrolyte membrane 300 on the electrode sheet 200 and improving the composite efficiency.
[0056] The composite device 100 further includes a winding mechanism 90. The winding mechanism 90 is used to wind the composite electrode sheet 400, realizing automatic winding of the composite electrode sheet 400, which helps to improve the production efficiency of the composite electrode sheet 400.
[0057] In the prior art, during the thermal lamination process of the solid electrolyte membrane 300 and the electrode sheet 200, defects will occur on the surface of the product. For example, cracks will appear locally, or the solid electrolyte will not be laminated properly in some areas, which will affect the battery capacity, lifespan, safety, etc. Currently, the defective electrode sheet 200 with thermal lamination defects is scrapped, resulting in a relatively high manufacturing cost for the qualified electrode sheet 200 and a relatively high manufacturing cost for the battery. It can be understood that the defects of the laminated electrode sheet 400 refer to the situation where the local lamination thickness of the solid electrolyte membrane 300 is less than its normal thickness, or there is no solid electrolyte membrane 300 laminated locally, so that the surface of the electrode sheet 200 is directly exposed, the surface of the electrode sheet 200 is not laminated with the solid electrolyte membrane 300, or cracks appear on the surface of the laminated solid electrolyte membrane 300.
[0058] To solve the above problems, as Figure 1 shown, the lamination device 100 provided in this embodiment further includes a repair mechanism 40. The repair mechanism 40 is used to detect and repair the defects of the laminated electrode sheet 400 to repair the defects. On the production line of laminating the solid electrolyte membrane 300 and the electrode sheet 200, the repair mechanism 40 compensates for the defective laminated electrode sheet 400 with thermal lamination defects, and completes the preparation of the laminated electrode sheet 400, improving the production continuity, reducing the scrap rate of the laminated electrode sheet 400 and reducing the manufacturing cost.
[0059] Specifically, as Figure 1 shown, the repair mechanism 40 includes a detection component 43 and a repair component 42. The detection component 43 is used to detect the type of the defects of the laminated electrode sheet 400 and obtain the location of the defects; the repair component 42 is communicatively connected to the detection component 43, and the repair component 42 is used to repair the defects according to the defect type and the location of the defects, realizing the automatic compensation for the defects, which is convenient for improving the automation degree of the lamination device 100.
[0060] It should be noted that the compensation material can be solid powder or liquid slurry. After the compensation material is compensated at the defective part of the laminated electrode sheet 400, it can be consistent with the composition of the solid electrolyte membrane 300.
[0061] In a specific embodiment, the compensation material is solid powder consistent with the composition of the solid electrolyte membrane 300. After the solid powder is compensated at the defective part of the laminated electrode sheet 400, it can be consistent with the composition of the solid electrolyte membrane 300; further, the repair component 42 is an extrusion mechanism, which can extrude the compensation material to the defective part to realize the repair of the defective part.
[0062] In an embodiment, the compensation material is liquid slurry, which is consistent with the composition of the solid electrolyte membrane 300 after being sprayed on the laminated electrode sheet 400 and processed by drying, etc. In a specific embodiment, the repair component 42 is a dispensing mechanism or a spraying mechanism, which can dispense or spray the compensation material at the defective part to realize the repair of the defective part.
[0063] Optionally, the repair mechanism 40 further includes a moving member 41. The moving member 41 is communicatively connected to the detecting member 43, and the repairing member 42 is connected to the output end of the moving member 41. The moving member 41 can drive the repairing member 42 to move to a position corresponding to the defect. It should be noted that "position corresponding" means that the position where the repairing member 42 is located can just satisfy that the compensation material ejected by it can reach the defect. The composite device 100 further includes a control component. The detecting member 43 is electrically connected to the control component. The detecting member 43 transmits the detected position of the defect to the control component, and the control component controls the moving member to transfer the repairing member 42 to the corresponding position, realizing automatic detection and compensation of the defect and improving the automation degree of the composite device 100. It can be understood that the moving member 41 can drive the repairing member 42 to synchronously transfer with the composite pole piece 400 during the transmission of the composite pole piece 400, so that the repairing member 42 compensates the defect of the composite pole piece 400 with the compensation material; it can also be that after the detecting member 43 detects the defect, the composite pole piece 400 stops transmitting, and the moving member 41 drives the repairing member 42 to transfer to the defect position according to the defect position detected by the detecting member 43. Among them, the moving member 41 can be a three-linear driving mechanism or a six-axis manipulator.
[0064] Specifically, the detecting member 43 can be a CCD camera, and the CCD camera identifies whether the composite pole piece 400 has a flaw defect by detecting the color difference. In other embodiments, the detecting member 43 can also be a ranging sensor, and it identifies whether the composite pole piece 400 has a flaw defect by detecting the coating thickness of the compensation material.
[0065] Optionally, the number of the repair mechanisms 40 is two. The two repair mechanisms 40 respectively detect and compensate the defects on both sides of the composite pole piece 400, improving the efficiency of compensating the defects of the composite pole piece 400.
[0066] Optionally, the composite device 100 further includes a leveling mechanism 50. Along the conveying direction of the composite pole piece 400, the leveling mechanism 50 is arranged downstream of the repair mechanism 40. The leveling mechanism 50 is used to level the compensation material supplemented at the defect of the composite pole piece 400. Using the leveling mechanism 50 to level the increased compensation material at the defect of the composite pole piece 400 can make the compensation material fill the defect of the composite pole piece 400 and be flush with the surface of the composite pole piece 400. The number of the leveling mechanisms 50 is two, and the two leveling mechanisms 50 are arranged on both sides of the composite pole piece 400 along the thickness direction of the composite pole piece 400 to realize double-sided leveling of the composite pole piece 400.
[0067] The leveling mechanism 50 includes a flattening member 51 and a flattening driving member 52. The flattening driving member 52 is configured to drive the flattening member 51 to apply pressure to the composite pole piece 400, so that the flattening member 51 flattens the compensation material added at the defective part of the composite pole piece 400. Among them, the flattening driving member 52 can be an electric push rod, a cylinder or a linear motor, etc.
[0068] In this embodiment, the flattening member 51 is plate-shaped. The plate-shaped flattening member 51 has a larger contact area with the defect, which is convenient for leveling the compensation material at the defective part. In other embodiments, the flattening member 51 can be in the form of a pressing roller or the like.
[0069] It should be noted that the repair member 42 can repair dot-shaped defects or long and narrow defects. For different types of defects, the repair member 42 and the leveling mechanism 50 can have different structural forms.
[0070] Optionally, the composite device 100 further includes a scraper 60. The scraper 60 is arranged downstream of the repair mechanism 40 and between the repair mechanism 40 and the leveling mechanism 50. The scraper 60 is used to scrape off the excess compensation material at the defective part of the composite pole piece 400, so that the compensation material supplemented at the defective part is flush with the composite pole piece 400.
[0071] As Figure 1 shown, the composite device 100 further includes a drying mechanism 70. The drying mechanism 70 is used to dry the compensation material supplemented at the defective part. Through the drying mechanism 70, the compensation material can be heated after adding the compensation material to the defective part of the composite pole piece 400, so that the compensation material fully fills the contour shape of the coating defect, and is dried by heat after fully filling the defect of the composite pole piece 400 and is connected as a whole with the solid electrolyte membrane 300 material around the defect of the composite pole piece 400.
[0072] Specifically, the drying mechanism 70 includes a hot air gun and / or an infrared lamp to improve the drying efficiency. In other embodiments, the drying mechanism 70 can also include other forms of heating elements, such as electric heating wires, etc.
[0073] The composite device 100 further includes a second composite mechanism 80. The second composite mechanism 80 is arranged downstream of the leveling mechanism 50. The second composite mechanism 80 is used to perform thermal composite on the composite pole piece 400 after supplementing the compensation material at the defective part, which is convenient for improving the composite effect of the composite pole piece 400 after defect repair. The second composite mechanism 80 can be a set of thermal composite rollers.
[0074] After the electrode sheet 200 and the solid electrolyte membrane 300 are unwound by the first unwinding mechanism 10 and the second unwinding mechanism 20 respectively, they first pass through the first composite mechanism 30 to achieve preliminary thermal composite. The composite electrode sheet 400 passes through the detector 43, the repair member 42, the leveling mechanism 50, the drying mechanism 70 and the second composite mechanism 80 in sequence to realize the preparation and thermal composite compensation of the composite electrode sheet 400. Finally, the winding mechanism 90 winds the composite electrode sheet 400, realizing the repair, leveling and drying of the defective parts of the composite electrode sheet 400 in sequence when the composite electrode sheet 400 is in a traveling state, improving the efficiency of defect repair.
[0075] Note that in the description of this specification, the descriptions referring to the terms "some embodiments", "other embodiments", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.
[0076] The above is only the preferred embodiment of the present invention and the technical principles applied. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein. Various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.
Claims
1. Composite device, characterized in that, Comprising: A first unwinding mechanism (10), configured to unwind a pole piece (200); A second unwinding mechanism (20), configured to unwind a solid electrolyte membrane (300); A first composite mechanism (30), configured to thermally composite the pole piece (200) and the solid electrolyte membrane (300) to form a composite pole piece (400); And A repair mechanism (40), configured to detect and repair defects of the composite pole piece (400).
2. The composite device according to claim 1, wherein The repair mechanism (40) includes: A detection member (43), configured to detect the type of the defect and obtain the position where the defect is located; A repair member (42), communicatively connected to the detection member (43), and the repair member (42) is used to repair the defect according to the defect type and the position where the defect is located.
3. The composite device according to claim 2, wherein The repair mechanism (40) further includes: A moving member (41), communicatively connected to the detection member (43), the repair member (42) is connected to the output end of the moving member (41), and the moving member (41) can drive the repair member (42) to move to correspond to the position of the defect.
4. The composite device according to claim 1, characterized in that, The composite device further includes: A leveling mechanism (50), along the conveying direction of the composite pole piece (400), the leveling mechanism (50) is arranged downstream of the repair mechanism (40), and the leveling mechanism (50) is configured to level the compensation material supplemented at the defect of the composite pole piece (400).
5. The composite device according to claim 4, characterized in that, The leveling mechanism (50) includes: A flattening member (51); A flattening driving member (52), the flattening driving member (52) is configured to drive the flattening member (51) to apply pressure to the composite pole piece (400), so that the flattening member (51) flattens the increased compensation material at the defect of the composite pole piece (400).
6. The composite device according to claim 4, characterized in that, The composite device further includes: A scraper (60), the scraper (60) is arranged between the repair mechanism (40) and the leveling mechanism (50), and the scraper (60) is configured to scrape off the excess compensation material at the defect of the composite pole piece (400).
7. The composite device according to claim 4, wherein The composite device further includes: A drying mechanism (70), the drying mechanism (70) is configured to dry the compensation material supplemented at the defect.
8. The composite device according to claim 7, wherein, The drying mechanism (70) includes a hot air gun and / or an infrared lamp.
9. The composite device according to any one of claims 1-6, characterized in that, The composite device further includes: A second composite mechanism (80), arranged downstream of the repair mechanism (40), and the second composite mechanism (80) is used to thermally composite the composite pole piece (400).
10. The composite device according to any one of claims 1-6, characterized in that, The number of the second unwinding mechanisms (20) is two, and the solid electrolyte membranes (300) unwound by the two second unwinding mechanisms (20) are respectively located on both sides of the pole piece (200); The number of the repair mechanisms (40) is also two, and the two repair mechanisms (40) respectively detect and compensate for the defects on both sides of the composite pole piece (400).