Dry-process electrode film edge cutting waste recovery device

Abstract

This utility model relates to the field of battery manufacturing, specifically to a device for recycling waste material from dry-process electrode film trimming. It includes a cyclone separator, the air inlet of which is connected to the outlet of a secondary crusher, and the inlet of the secondary crusher is connected to the outlet of a primary crusher. The air outlet of the cyclone separator is connected to the air inlet of a dust collector, and the air outlet of the dust collector is connected to a vortex air pump. A hopper is fixedly installed at the lower end of the cyclone separator, and a discharge pipe for discharging solid materials is provided at the lower end of the hopper. Two valves are installed at intervals on the discharge pipe, and the lower end of the discharge pipe is connected to the inlet of a tertiary crusher. Through multi-stage crushing technology, efficient and low-cost recycling of dry-process electrode waste is achieved.

Description

Technical Field

[0001] This utility model relates to the field of battery manufacturing, specifically to a device for recycling waste material from the trimming of dry electrode films. Background Technology

[0002] In the dry electrode preparation process, the calendering process is a process in which heated binder electrode powder containing a three-dimensional network structure is passed through the gap between one or more pairs of horizontally rotating rollers, so that the material is subjected to extrusion and stretching, and becomes a self-supporting electrode film with a certain thickness, width and smooth surface.

[0003] During calendering, when the binder passes through the roller gap, the rollers apply significant lateral pressure to the powder material. Combined with the weight of the rollers themselves, the powder undergoes both viscous flow and elastic deformation during film formation, resulting in wavy edges on the self-supporting electrode film, rendering it unusable in subsequent processes. Therefore, a trimming device is typically added after the electrode film has been formed and shaped, but before winding, to trim the irregular edges. This portion of the material cannot be directly reused and is usually discarded or simply incinerated, leading to resource waste and environmental pollution. Utility Model Content

[0004] The purpose of this invention is to provide a dry electrode film trimming waste recycling device, which achieves efficient and low-cost recycling of dry electrode waste through multi-stage crushing technology, thereby solving the defects mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A dry electrode film trimming waste recycling device includes a cyclone separator. The air inlet of the cyclone separator is connected to the discharge port of a secondary crusher, and the feed inlet of the secondary crusher is connected to the discharge port of a primary crusher. The air outlet of the cyclone separator is connected to the air inlet of a dust collector, and the air outlet of the dust collector is connected to a vortex air pump. A hopper is fixedly installed at the lower end of the cyclone separator. The lower end of the hopper is provided with a discharge pipe for discharging solid materials. Two valves are installed at intervals on the discharge pipe, and the lower end of the discharge pipe is connected to the feed inlet of a tertiary crusher.

[0006] As a preferred technical solution, both the primary crusher and the secondary crusher include a casing. Two parallel rotating shafts are rotatably installed inside the casing. Multiple sets of cutters are fixedly installed on the rotating shafts, evenly spaced along their length, and the cutters on the two rotating shafts are staggered. Meshing gears are fixedly installed on the two rotating shafts, and one of the rotating shafts is connected to a drive motor.

[0007] As a preferred technical solution, the feed inlet of the primary crusher is connected to a collection hood via a pipeline.

[0008] As a preferred technical solution, the valve is a pneumatic butterfly valve.

[0009] As a preferred technical solution, the three-stage crusher includes a cylindrical barrel, the top of which is detachably fitted with a top cover. The top cover is provided with a feed inlet for the three-stage crusher, which is connected to the lower end of the discharge pipe. A crushing motor is installed at the bottom of the barrel, and the motor shaft of the crushing motor extends into the barrel and is fixedly installed with a central shaft coaxially arranged with the barrel. Multiple crushing blades are fixedly installed on the central shaft and evenly distributed.

[0010] As a preferred technical solution, a three-stage crusher discharge port is provided on one side of the lower end of the barrel, and the three-stage crusher discharge port is connected to the collection barrel through a discharge pipe; a wall scraper is also fixedly installed on the central shaft, and the wall scraper has a horizontal part that contacts the bottom wall of the inner cavity of the barrel, and the end of the horizontal part has a vertical part that contacts the peripheral wall of the inner cavity of the barrel.

[0011] Compared with the prior art, the beneficial effects of this utility model are: 1. This application achieves efficient and low-cost recycling of dry electrode waste through multi-stage crushing technology, solving industry pain points and having significant economic and environmental benefits. It is suitable as a standard equipment for battery manufacturing companies. 2. The process described in this application is simple, low-cost, and free from secondary pollution, thus meeting the demand for efficient and continuous production of dry electrode processes; 3. This application adopts a fully enclosed design, which can reduce dust leakage during the crushing process. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model; Figure 2 This is a schematic diagram of the structure of the primary pulverizer according to an embodiment of the present invention; Figure 3 This is a structural schematic diagram of a three-stage pulverizer according to an embodiment of the present invention.

[0014] In the diagram: 1-Cyclone separator; 2-Primary crusher; 3-Secondary crusher; 4-Chassis; 5-Collection hood; 6-Dry electrode calender roller; 7-Slitting knife; 8-Rotating shaft; 9-Individual cutter; 10-Gear; 11-Drive motor; 12-Dust collector; 13-Vortex air pump; 14-Ash hopper; 15-Discharge pipe; 16-Pneumatic butterfly valve; 18-Tertiary crusher; 19-Barrel body; 20-Handwheel hinge; 21-Top cover; 22-Tertiary crusher inlet; 23-Crushing motor; 24-Central shaft; 25-Crushing blade; 26-Tertiary crusher outlet; 27-Discharge pipe; 28-Collection barrel; 29-Wall scraper. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] like Figures 1 to 3 As shown, the dry electrode film trimming waste recycling device includes a cyclone separator 1, a primary crusher 2, and a secondary crusher 3. The primary crusher 2 is located above the secondary crusher 3. Both the primary crusher 2 and the secondary crusher 3 include a casing 4. The casing 4 has a feed inlet at the top and a discharge outlet at the bottom. The discharge outlet of the primary crusher 2 is connected to the feed inlet of the secondary crusher 3 via a pipeline. The top of the cyclone separator 1 has an air inlet, which is connected to the discharge outlet of the secondary crusher 3 via a pipeline. The feed inlet of the primary crusher 2 is connected to a collection hood 5 via a pipeline. Slitting blades 7 for trimming the electrode films are located on both sides of the dry electrode calender roller 6. The collection hood 5 is mounted behind the slitting blades 7, allowing the waste generated from trimming the electrode films to be easily sucked into the primary crusher 2. Figure 2 As shown, two parallel rotating shafts 8 are rotatably mounted inside the housing 4 via bearings. The rotating shafts 8 are horizontally positioned, and multiple sets of cutters are fixedly mounted on each shaft 8, evenly spaced along its length. Each set of cutters includes multiple individual cutters 9 evenly spaced around the circumference of the rotating shaft 8, extending radially along the shaft 8. The cutters on the two rotating shafts 8 are staggered. Meshing gears 10 are fixedly mounted on the two rotating shafts 8, and the end of one of the rotating shafts 8 is connected to the motor shaft of a drive motor 11 via a coupling. The drive motor 11 is bolted to the outer wall of the housing 4. When the drive motor 11 operates, it drives the two rotating shafts 8 to rotate in opposite directions under the action of the gears 10, thus performing a high-speed shearing and crushing operation on the electrode diaphragm waste material via the cutters on the two rotating shafts 8. Before entering the cyclone separator 1, the electrode diaphragm waste will be crushed in two stages by a primary crusher 2 and a secondary crusher 3, which will crush the flaky or strip-shaped material into fragments.

[0017] The top side of the cyclone separator 1 is provided with an air outlet, which is connected to the air inlet of the dust collector 12 through a pipeline. The dust collector 12 is equipped with a filter bag, which can filter the fine dust generated by the primary crusher 2 and the secondary crusher 3. The air outlet of the dust collector 12 is connected to the vortex air pump 13 through a pipeline. The vortex air pump 13 is the power device for the negative pressure of the entire system. The negative pressure generated draws the waste generated by the cutting edge of the electrode diaphragm into the cyclone separator 1.

[0018] A hopper 14 is bolted to the lower end of the cyclone separator 1. A discharge pipe 15 for discharging solid materials is located at the lower end of the hopper 14. Two valves, specifically pneumatic butterfly valves 16, are installed on the discharge pipe 15 at intervals. The lower end of the discharge pipe 15 connects to the feed inlet of the tertiary crusher 18. The crushed material from the primary crusher 2 and the secondary crusher 3 enters the cyclone separator 1 and is temporarily stored in the hopper 14. First, the upper pneumatic butterfly valve 16 is opened and the lower pneumatic butterfly valve 16 is closed. Under gravity, a certain amount of crushed material in the hopper 14 falls downwards into the discharge pipe 15 between the two pneumatic butterfly valves 16. Then, the upper pneumatic butterfly valve 16 is closed and the lower pneumatic butterfly valve 16 is opened, causing a fixed amount of crushed material to fall downwards into the tertiary crusher 18 for further crushing.

[0019] The three-stage pulverizer 18 is located below the cyclone separator 1, such as... Figure 3 As shown, the three-stage crusher 18 includes a cylindrical barrel 19 that extends vertically. A top cover 21 is detachably mounted on the top of the barrel 19 via multiple handwheel hinges 20, facilitating the removal of the top cover 21 for cleaning the interior of the barrel 19. The top of the top cover 21 is provided with a three-stage crusher inlet 22, which is connected to the lower end of the discharge pipe 15. A crushing motor 23 is bolted to the bottom of the barrel 19. The motor shaft of the crushing motor 23 extends into the barrel 19 and is fixedly mounted with a central shaft 24 coaxial with the barrel 19 via a coupling. Multiple evenly distributed crushing blades 25 are welded onto the central shaft 24, which extends radially along the central shaft 24. The crushing motor 23 drives the central shaft 24 to rotate, and the central shaft 24 drives the crushing blades 25 to further crush the shredded electrode film waste.

[0020] A three-stage pulverizer outlet 26 is provided on one side of the lower end of the barrel 19. The three-stage pulverizer outlet 26 is connected to the collection barrel 28 through the discharge pipe 27, which is equipped with a discharge valve. A scraper blade 29 is also welded onto the central shaft 24. The scraper blade 29 has a horizontal part that contacts the bottom wall of the inner cavity of the barrel 19. The horizontal part is used to scrape the material on the bottom wall of the inner cavity of the barrel 19. The end of the horizontal part away from the central shaft 24 has a vertical part that is integrally formed and contacts the peripheral wall of the inner cavity of the barrel 19. The vertical part is used to scrape the material at the lower end of the inner peripheral wall of the barrel 19. After the pulverizer blade 25 pulverizes the material to the target particle size, the discharge valve on the discharge pipe 27 is opened. Driven by the scraper blade 29, the material in the barrel 19 is thrown out to the three-stage pulverizer outlet 26 and transferred to the collection barrel 28 for collection through the discharge pipe 27.

[0021] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A dry electrode film edge trim scrap recovery apparatus, characterized by: The device includes a cyclone separator, the air inlet of which is connected to the discharge port of a secondary pulverizer, the air inlet of which is connected to the discharge port of a primary pulverizer; the air outlet of the cyclone separator is connected to the air inlet of a dust collector, and the air outlet of the dust collector is connected to a vortex air pump; a hopper is fixedly installed at the lower end of the cyclone separator, and a discharge pipe for discharging solid materials is provided at the lower end of the hopper, with two valves spaced apart on the discharge pipe, and the lower end of the discharge pipe is connected to the feed port of a tertiary pulverizer.

2. The dry electrode web trim scrap recycling apparatus of claim 1, wherein: Both the primary pulverizer and the secondary pulverizer include a casing. Two parallel rotating shafts are rotatably mounted inside the casing. Multiple sets of cutters are fixedly mounted on the rotating shafts, evenly spaced along their length, and the cutters on the two rotating shafts are staggered. Meshing gears are fixedly mounted on the two rotating shafts, and one of the rotating shafts is connected to a drive motor.

3. The dry electrode web trim scrap recycling apparatus of claim 1, wherein: The feed inlet of the primary crusher is connected to a collection hood via a pipeline.

4. The dry electrode web trim scrap recycling apparatus of claim 1, wherein: The valve is a pneumatic butterfly valve.

5. The dry electrode web trim scrap recycling apparatus of claim 1, wherein: The three-stage crusher includes a cylindrical barrel with a detachable top cover. The top cover has a feed inlet for the three-stage crusher, which is connected to the lower end of the discharge pipe. A crushing motor is installed at the bottom of the barrel. The motor shaft of the crushing motor extends into the barrel and is fixedly mounted with a central shaft coaxial with the barrel. Multiple evenly distributed crushing blades are fixedly mounted on the central shaft.

6. The dry electrode web trim scrap recycling apparatus of claim 5, wherein: The lower end of the barrel is provided with a three-stage crusher outlet, which is connected to a collection barrel through a discharge pipe; a wall scraper is also fixedly installed on the central shaft, the wall scraper has a horizontal part that contacts the bottom wall of the inner cavity of the barrel, and the end of the horizontal part has a vertical part that contacts the peripheral wall of the inner cavity of the barrel.

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