A positive electrode slurry recovery device
By designing an integrated positive electrode slurry recovery device, which uses a box and partition structure and a flow channel to achieve the separate collection of positive electrode slurry and ceramic slurry, the problem of inconvenient disassembly and assembly and difficult separation in the existing technology is solved, thereby improving the purity and economic benefits of slurry recovery.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 天能新能源(湖州)有限公司
- Filing Date
- 2025-07-03
- Publication Date
- 2026-07-07
AI Technical Summary
Existing slurry recovery devices are inconvenient to disassemble and maintain, and are difficult to effectively separate and recover cathode slurry and ceramic slurry, resulting in resource waste and low economic efficiency.
An integrated positive electrode slurry recovery device was designed, which adopts a box and partition structure. The positive electrode slurry and ceramic slurry are collected separately through a guide channel. The width of the guide channel is larger than that of the ceramic slurry extrusion section. Bolts are installed on the outside of the guide channel for easy disassembly and assembly. The box is wider at the top and narrower at the bottom to improve the collection efficiency.
It achieves efficient classification and recycling of slurry, simplifies the disassembly and assembly process of the device, improves the recycling purity and economic benefits of cathode slurry, and reduces maintenance difficulty.
Smart Images
Figure CN224463097U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of slurry spraying technology, and in particular to a positive electrode slurry recovery device used in the discharge of material from the die head of a coating machine. Background Technology
[0002] In the coating process, die feeding is performed in various stages, including normal start-up / roll change feeding, equipment debugging / parameter adjustment feeding, short-term shutdown / fault handling feeding, and line cleaning / type change feeding. However, when coating the positive electrode of the battery, the die sprays both positive electrode slurry and ceramic slurry simultaneously. Therefore, during feeding, the positive electrode slurry and ceramic slurry mix together and can only be disposed of as waste.
[0003] To recycle slurry, existing technologies, such as the patent document with authorization publication number CN221733885U, disclose a diverter block, a slurry recovery device, and a coating spraying device. The diverter block is mounted on the slurry recovery device, which receives slurry overflowing from the coating die. The slurry recovery device includes a first return chamber connected to a first outlet of the coating die and a second return chamber connected to a second outlet of the coating die. The diverter block guides the slurry overflowing from the first outlet into the first return chamber. The diverter block includes a diverter chamber and a slurry overflow outlet. The diverter chamber receives the slurry overflowing from the first outlet, and the slurry overflow outlet is connected to the diverter chamber, allowing the slurry in the diverter chamber to flow from the overflow outlet into the first return chamber. The diverter block prevents the slurry overflowing from the first outlet and the second outlet from mixing.
[0004] However, the aforementioned slurry recovery device still suffers from inconvenience in disassembly, assembly, and maintenance. Utility Model Content
[0005] The purpose of this invention is to solve the problems existing in the prior art and provide a positive electrode slurry recovery device with a simple structure that is easy to disassemble and maintain.
[0006] The objective of this utility model is achieved through the following technical solution:
[0007] A positive electrode slurry recovery device is used in a coating machine. The coating machine is equipped with a die head, and the die head is equipped with an extrusion port. The extrusion port includes multiple ceramic slurry extrusion sections and positive electrode slurry extrusion sections. Each positive electrode slurry extrusion section has ceramic slurry extrusion sections on both sides. The recovery device is equipped with a positive electrode slurry recovery tank and a ceramic slurry recovery tank. The positive electrode slurry recovery tank is located below the extrusion port. A guide channel is provided on the upper part of the positive electrode slurry recovery tank below each ceramic slurry extrusion section. The guide channel is connected to the ceramic slurry recovery tank.
[0008] Preferably, the width of the guide groove is greater than the width of the ceramic slurry extrusion section.
[0009] Preferably, the recycling device includes a box and a partition, with an opening at the top of the box and the partition disposed inside the box to separate the positive electrode slurry recycling tank and the ceramic slurry recycling tank.
[0010] Preferably, the upper end of the partition is provided with a notch, and a bottom plate and two side plates are provided between the edge of the notch and an inner side wall of the box body to form the flow guide channel.
[0011] Preferably, the box has a collection structure that is wider at the top and narrower at the bottom.
[0012] Preferably, the upper part of the box is connected to the coating machine by bolts.
[0013] Preferably, the bolt is located outside the guide groove.
[0014] Preferably, the lower ends of the positive electrode slurry recovery tank and the ceramic slurry recovery tank are each provided with a collection pipe.
[0015] Preferably, the width of the positive electrode slurry recovery tank is greater than the width of the ceramic slurry recovery tank.
[0016] Preferably, the bottom of the guide channel is inclined.
[0017] The advantages of this utility model are:
[0018] 1. The integrated recycling device allows for the separate collection of positive electrode slurry and ceramic slurry, making disassembly and maintenance from the coating machine more convenient;
[0019] 2. By increasing the width of the guide channel, the completeness of its collection of ceramic slurry is ensured, thereby guaranteeing the purity of the recovered cathode slurry;
[0020] 3. The box structure, which is wider at the top and narrower at the bottom, helps to improve the efficiency of slurry collection. Attached Figure Description
[0021] Figure 1 This is a top view of the coating machine provided in the embodiments of this specification;
[0022] Figure 2 for Figure 1 Enlarged structural diagram at point A;
[0023] Figure 3 This is a cross-sectional view of the coating machine provided in the embodiments of this specification;
[0024] Figure 4 This is a schematic diagram of the structure of a positive electrode slurry recovery device provided in the embodiments of this specification;
[0025] In the diagram: 1-Coating machine; 2-Die head; 3-Extrusion port; 41-Positive electrode slurry recovery tank; 42-Ceramic slurry recovery tank; 43-Guide channel; 401-Box body; 402-Separator; 403-Bottom plate; 404-Side plate; 51-Positive electrode slurry; 52-Ceramic slurry; 6-Collection pipe. Detailed Implementation
[0026] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.
[0027] As mentioned in the background section, the slurry recovery device requires the return box and multiple diversion blocks to be installed on the coating machine, making the disassembly and assembly process relatively cumbersome and inconvenient.
[0028] Therefore, such as Figure 1-4 As shown, this embodiment provides a positive electrode slurry recovery device for a coating machine 1. The coating machine is equipped with a die head 2, which has an extrusion port 3. The extrusion port 3 includes multiple ceramic slurry extrusion sections and positive electrode slurry extrusion sections. Each positive electrode slurry extrusion section has ceramic slurry extrusion sections on both sides. In this embodiment, the die head can simultaneously spray four lithium battery positive electrodes, so there are four positive electrode slurry extrusion sections and five ceramic slurry extrusion sections. The recovery device is installed on the coating machine 1 and is located below the extrusion port 3 of the die head 2. Inside the recovery device, along the orientation of the extrusion port 3, there are sequentially arranged positive electrode slurry recovery tanks 41 and ceramic slurry recovery tanks 42, that is, the positive electrode slurry recovery tank 41 is located on the inner side, and the ceramic slurry recovery tank 42 is located on the outer side. The positive electrode slurry recovery tank 41 is located directly below the extrusion port 3. At the same time, a guide channel 43 is provided on the upper part of the positive electrode slurry recovery tank 41 below each ceramic slurry extrusion section, and the guide channel 43 is connected to the ceramic slurry recovery tank 42. In this way, the positive electrode slurry 51 overflowing from the extrusion port 3 will fall directly into the document slurry recycling tank 41, while the ceramic slurry 52 will first fall into the guide channel 43 and then flow into the ceramic slurry recycling tank 42, achieving the separate recycling of the two slurries. Unlike the prior art, the recycling device provided in this embodiment adopts an integrated structure, making the disassembly and assembly process of the entire device with the coating machine more convenient and efficient.
[0029] Specifically, some mixing is inevitable at the interface between the two slurries, making complete separation impossible. Furthermore, the cost of the cathode slurry is significantly higher than that of the ceramic slurry. Therefore, to ensure the purity of the recovered cathode slurry and prevent the mixing of ceramic slurry, the width of the guide channel 43 can be greater than the width of the ceramic slurry extrusion section. In this way, the guide channel 43 will receive all the ceramic slurry and a small portion of the cathode slurry, which will be treated as waste. The cathode slurry recovery tank 41 will receive only the cathode slurry, which can be recycled and reused, improving economic efficiency.
[0030] The entire recycling device has a simple structure and is easy to manufacture. Specifically, it includes a box body 401 and a partition plate 402. The box body 401 has an opening at the top, and the partition plate 402 is located inside the box body 401 to separate the positive electrode slurry recycling tank 41 and the ceramic slurry recycling tank 42. The upper end of the partition plate 402 has a rectangular notch, and a bottom plate 403 and two side plates 404 are provided between the edge of the notch and one inner side wall of the box body 401 to form a guide channel 43.
[0031] To improve the efficiency of slurry recovery and prevent slurry from accumulating and solidifying at the bottom of the recovery tank, the box 401 has a collection structure that is wider at the top and narrower at the bottom. Additionally, a collection pipe 6 is provided at the lower end of both the positive electrode slurry recovery tank 41 and the ceramic slurry recovery tank 43 to facilitate rapid discharge of the slurry.
[0032] In a more conventional manner, the box body 401 is connected to the coating machine 1 by bolts. To avoid a large gap between the upper part of the box body 401 and the coating machine 1, the bolts can be installed on the upper part of the box body, which also facilitates the installation and removal of the bolts. In order to minimize the impact of slurry splashing onto the bolts and affecting their removal, the bolts are installed outside the guide channel 43 to prevent slurry splashed from the higher guide channel from affecting the bolts.
[0033] In addition, since the positive electrode slurry recovery tank 41 and the guide tank 42 directly receive the slurry, and the guide tank 42 is located on the upper part of the positive electrode slurry recovery tank 41, and both have the same width along the direction of the extrusion port, in order to ensure the reliability of slurry reception, the width of the positive electrode slurry recovery tank 41 can be increased while the width of the ceramic slurry recovery tank 43 can be decreased, rather than being equal, while keeping the width of the entire box 401 unchanged.
[0034] To prevent slurry from accumulating in the guide channel 42, the bottom of the guide channel 42 can be tilted, that is, the end near the ceramic slurry recovery tank 43 is lower, so as to improve the efficiency of slurry flowing into the ceramic slurry recovery tank.
[0035] The above are merely preferred embodiments of this utility model, and are implementations based on the overall concept of this utility model. Furthermore, the scope of protection of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.
Claims
1. A positive electrode slurry recovery device for use in a coating machine, the coating machine being equipped with a die head, the die head having an extrusion port, the extrusion port comprising multiple ceramic slurry extrusion sections and a positive electrode slurry extrusion section, each positive electrode slurry extrusion section having ceramic slurry extrusion sections on both sides, characterized in that, The recycling device is equipped with a positive electrode slurry recycling tank and a ceramic slurry recycling tank. The positive electrode slurry recycling tank is located below the extrusion port. A guide channel is provided on the upper part of the positive electrode slurry recycling tank below each ceramic slurry extrusion section, and the guide channel is connected to the ceramic slurry recycling tank.
2. The positive electrode slurry recovery device according to claim 1, characterized in that, The width of the guide channel is greater than the width of the ceramic slurry extrusion section.
3. The positive electrode slurry recovery device according to claim 1, characterized in that, The recycling device includes a box and a partition. The box has an opening at the top, and the partition is located inside the box to separate the positive electrode slurry recycling tank and the ceramic slurry recycling tank.
4. The positive electrode slurry recovery device according to claim 3, characterized in that, The upper end of the partition is provided with a notch, and a bottom plate and two side plates are provided between the edge of the notch and one inner side wall of the box to form the flow channel.
5. The positive electrode slurry recovery device according to claim 3, characterized in that, The box has a collection structure that is wider at the top and narrower at the bottom.
6. The positive electrode slurry recovery device according to claim 3, characterized in that, The upper part of the box is connected to the coating machine by bolts.
7. The positive electrode slurry recovery device according to claim 6, characterized in that, The bolts are located on the outside of the guide groove.
8. The positive electrode slurry recovery device according to claim 1, characterized in that, The lower ends of the positive electrode slurry recovery tank and the ceramic slurry recovery tank are each equipped with a collection pipe.
9. The positive electrode slurry recovery device according to claim 1, characterized in that, The width of the positive electrode slurry recovery tank is greater than the width of the ceramic slurry recovery tank.
10. The positive electrode slurry recovery device according to claim 1, characterized in that, The bottom of the flow guide channel is inclined.