Integrated dry method electrode piece manufacturing device

Abstract

The utility model discloses an integrated dry-method electrode piece manufacturing device. The integrated dry-method electrode piece manufacturing device sequentially comprises a feeding unit, an internal mixing unit, an infrared heating assembly, a tab extension mechanism and a rolling thickness measuring unit in the material circulation direction. According to the integrated dry method electrode piece manufacturing device, the stability of the surface density process is improved by controlling the distance between the transfer roller and the scraper, meanwhile, the infrared heating mechanism is integrated to further remove water and enhance the electrode density and conductivity, the tab extension / rolling / thickness measuring mechanism avoids belt breakage of a high-extension electrode material, and the production efficiency is improved. Therefore, rapid and stable preparation of the dry-method electrode plate is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of electrode piece processing equipment, in particular to an integrated dry-process electrode piece manufacturing device. Background Art

[0002] Dry-process electrodes, due to their simple processing, require no solvents and can eliminate the need for a coating oven compared to wet coating, significantly reducing production costs. The binder's internal fiber mesh structure eliminates the risk of binder baking and delamination during wet coating. This effectively reduces electrode internal resistance, improves battery cell rate performance, increases electrode compaction, and enhances battery cell energy density, offering promising application prospects. However, insufficient process stability limits the further development of dry-process electrodes. The solvent-free system leaves room for improvement in the dispersion of dry-process components and the ability to control process density. The preparation of dry-process electrodes places even more stringent requirements on both process and equipment. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides an integrated dry-process electrode pole piece manufacturing device, which can effectively improve the uniformity of electrode components, coating consistency, and process continuity, and realize the rapid and stable preparation of dry-process electrode pole pieces.

[0004] The technical solutions provided by this utility model are as follows:

[0005] An integrated dry-process electrode plate manufacturing device comprises a feeding unit, a mixing unit, an infrared heating component, a tab extension mechanism and a roller pressure thickness measurement unit in the direction of material flow.

[0006] Preferably, there are two mixing units which are arranged opposite to each other to achieve synchronous compression molding of the A / B surfaces of the current collector.

[0007] Preferably, the feeding unit includes a current collector unwinding mechanism, a feeding bin and a screw extrusion mechanism.

[0008] Preferably, the mixing unit includes a mixing roller, a transfer roller and a composite roller, the mixing roller and the transfer roller are arranged opposite to each other and rotate in opposite directions, and the transfer roller and the composite roller are arranged opposite to each other and rotate in opposite directions; the discharge end of the feeding unit is located above the gap formed between the mixing roller and the transfer roller.

[0009] Preferably, the mixing unit further comprises a mixing tank, the mixing roller is arranged in the mixing tank, a scraper is provided in the mixing tank, and the scraper is connected to a position-adjustable mechanism for adjusting the distance between the transfer roller and the scraper.

[0010] Preferably, a winding mechanism is provided at the discharge end of the roller thickness measuring unit.

[0011] Preferably, the rolling thickness measuring unit includes a rolling mechanism and a thickness measuring mechanism.

[0012] The utility model has the following advantages over the prior art:

[0013] The integrated dry electrode plate manufacturing device of this embodiment improves the uniformity of dry electrode components by adding a mixing tank; improves the surface density process stability by controlling the distance between the transfer roller and the scraper, and integrates an infrared heating mechanism to further remove water and enhance the electrode density and conductivity. The tab extension / rolling / thickness measurement mechanism avoids the breakage of high-extensibility electrode materials, thereby realizing the rapid and stable preparation of dry electrode plates. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 This is a schematic structural diagram of an integrated dry-process electrode plate manufacturing device in an embodiment of the present utility model.

[0016] Reference numerals:

[0017] 1. Infrared heating assembly; 2. Tab extension mechanism; 3. Roller pressing thickness measuring unit; 31. Roller pressing mechanism; 32. Thickness measuring mechanism; 4. Collector unwinding mechanism; 5. Feeding bin; 6. Screw extrusion mechanism; 7. Mixing roller; 8. Transfer roller; 9. Composite roller; 10. Mixing tank; 11. Rewinding mechanism. DETAILED DESCRIPTION

[0018] In order to help those skilled in the art better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention are clearly and completely described below. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0019] like Figure 1As shown, an embodiment of the present invention provides an integrated dry-process electrode plate manufacturing device, which includes a feeding unit, a mixing unit, an infrared heating component 1, a tab extension mechanism 2, a roller thickness measurement unit 3 and a winding mechanism 11 in order according to the material flow direction. There are two mixing units and they are arranged relative to each other to achieve synchronous pressing and forming of the A / B surfaces of the current collector. The feeding unit includes a current collector unwinding mechanism 4, a feeding bin 5 and a screw extrusion mechanism 6. The mixing unit includes a mixing roller 7, a transfer roller 8, a composite roller 9 and a mixing tank 10. The mixing roller 7 is arranged opposite to the transfer roller 8 and rotates in opposite directions. The transfer roller 8 is arranged opposite to the composite roller 9 and rotates in opposite directions. The discharge end of the feeding unit is located above the gap formed between the mixing roller 7 and the transfer roller 8. The mixing roller 7 is arranged in the mixing tank 10. A scraper is provided in the mixing tank 10. The scraper is connected to a position-adjustable mechanism to adjust the distance between the transfer roller 8 and the scraper.

[0020] In this embodiment, the rolling thickness measuring unit 3 includes a rolling mechanism 31 and a thickness measuring mechanism 32 .

[0021] In this embodiment, the infrared heating assembly 1, the tab extension mechanism 2, the winding mechanism 11, the current collector unwinding mechanism 4, the screw extrusion mechanism 6, the rolling mechanism 31 and the thickness measuring mechanism 32 are respectively structures that have been disclosed in the prior art and can realize corresponding functions.

[0022] In this embodiment, the positive / negative electrode powder, conductive carbon, and binder components are added from the left and right feed bins 5, respectively, mixed and extruded into a mixing tank 10 via a screw extruder 6. The mixing rollers 7 and transfer rollers 8 continuously rotate relative to each other, further kneading and dispersing the electrode materials while simultaneously raising the electrode temperature for easier processing. The amount of electrode material transferred is adjusted by varying the spacing between the transfer rollers 8 and the scrapers on the mixing tank 10, enabling precise control of the coating density. The positive / negative electrodes are then simultaneously pressed and formed on their A / B surfaces by a composite roller and the current collector fed by the current collector unwinding mechanism 4. The pressed electrode sheets are then passed through an infrared heating mechanism 1 to further remove moisture from the electrodes and enhance their density and conductivity, while also increasing the electrode temperature for improved subsequent rolling processability. After infrared heating, the tabs are stretched by a tab stretching mechanism 2, effectively mitigating foil buckling, wrinkling, cracking, and breakage caused by mismatches in the elongation of the electrode material and the current collector. Finally, the electrodes undergo rolling and thickness measurement, completing the winding process.

[0023] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An integrated dry electrode sheet manufacturing device, characterized in that: The device comprises, in order of material flow direction, a feeding unit, a mixing unit, an infrared heating component (1), a tab extension mechanism (2) and a roller pressure thickness measuring unit (3).

2. The integrated dry electrode sheet manufacturing device according to claim 1, characterized in that: There are two mixing units which are arranged opposite to each other to achieve synchronous compression molding of the A / B surfaces of the current collector.

3. The integrated dry-process electrode sheet manufacturing device according to claim 1, characterized in that: The feeding unit comprises a current collector unwinding mechanism (4), a feeding bin (5) and a screw extrusion mechanism (6).

4. The integrated dry-process electrode sheet manufacturing device according to claim 1, characterized in that: The mixing unit comprises a mixing roller (7), a transfer roller (8) and a composite roller (9); the mixing roller (7) and the transfer roller (8) are arranged opposite to each other and rotate in opposite directions; the transfer roller (8) and the composite roller (9) are arranged opposite to each other and rotate in opposite directions; the discharge end of the feeding unit is located above the gap formed between the mixing roller (7) and the transfer roller (8).

5. The integrated dry-process electrode sheet manufacturing device according to claim 4, characterized in that: The mixing unit further comprises a mixing tank (10), the mixing roller (7) is arranged in the mixing tank (10), a scraper is provided in the mixing tank (10), and the scraper is connected to a position-adjustable mechanism for adjusting the distance between the transfer roller (8) and the scraper.

6. The integrated dry-process electrode sheet manufacturing device according to any one of claims 1 to 5, characterized in that: A winding mechanism (11) is provided at the discharge end of the roller pressure thickness measuring unit (3).

7. The integrated dry-process electrode sheet manufacturing device according to any one of claims 1 to 5, characterized in that: The rolling thickness measuring unit (3) comprises a rolling mechanism (31) and a thickness measuring mechanism (32).

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