A kind of lithium copper foil production prevents foil face color difference and sprays acid rod device after
Patent Information
- Application Number
- CN202522041317.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-23
- Publication Date
- 2026-09-04
- Estimated Expiration
- 2035-09-23
AI Technical Summary
[0005]本实用新型技术方案针对现有技术解决方案过于单一的技术问题，提供了显著不同于现有技术的解决方案，主要提供了一种锂电铜箔生产中防止箔面色差的后喷酸杆装置，用以解决上述背景技术中提出的电解液在喷酸杆长度方向上的流速分布不均，导致阴极辊表面的电解液覆盖不均匀以及电解液中的微小颗粒容易在孔内沉积的技术问题
本实用新型通过采用圆柱形中空腔体的喷酸杆设计，使电解液在腔内均匀分布，通过径向对称的喷淋嘴向阴极辊表面喷射，确保电解液覆盖无死角，喷淋嘴孔径从杆体中部向两端逐渐增大，补偿因流体压力损失导致的边缘流量衰减，实现全幅宽均匀喷淋，同时设置加热管以及隔温壳提升喷酸杆内部电解液温度，避免电解液形成结晶堵塞喷淋嘴，在喷淋嘴内壁设置锥形导流面也可以进一步减少颗粒物滞留。
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Figure CN224716699U_ABST
Abstract
Description
Technical Field
[0001] This utility model mainly relates to the field of lithium battery copper foil manufacturing technology, specifically a post-acid spraying rod device for preventing color difference on the foil surface during lithium battery copper foil production. Background Technology
[0002] In the electrolytic deposition process of lithium-ion battery copper foil, the uniform distribution of electrolyte on the cathode roller surface has a crucial impact on the crystallization quality and surface color consistency of the copper foil. To prevent uneven traces of electrolyte on the cathode roller surface, which would affect the surface quality of the copper foil, an electrolyte spraying operation is usually performed at the inlet of the foil forming machine tank. This step is commonly referred to in the industry as post-acid spraying. The main function of post-acid spraying is to wash away copper ions on the cathode roller surface, making the surface of the copper foil smooth and flat. Traditional post-acid spraying devices mainly consist of an acid spraying rod and an acid spraying pipe.
[0003] However, traditional acid spraying rod designs often employ a flat tubular structure, with spray nozzles typically arranged in a straight line or simple array. Due to the uneven distribution of electrolyte flow velocity along the length of the acid spraying rod, the electrolyte coverage on the cathode roller surface is uneven, resulting in localized concentration differences. These concentration differences directly affect the crystallization process of the copper foil, ultimately leading to color difference issues. Simultaneously, tiny particles in the electrolyte are prone to depositing within the holes, which not only affects the stability of the spray flow rate but may also cause nozzle blockage, further impacting the uniformity of the spray.
[0004] Therefore, a post-acid spraying rod device is proposed to prevent color difference on the foil surface during the production of lithium battery copper foil. Utility Model Content
[0005] This utility model provides a solution that is significantly different from existing technologies, addressing the problem that existing solutions are too simplistic. It mainly provides a post-acid spraying rod device to prevent color difference on the foil surface during lithium battery copper foil production. This device solves the technical problems mentioned in the background art, such as uneven distribution of electrolyte flow rate along the length of the acid spraying rod, resulting in uneven electrolyte coverage on the cathode roller surface and easy deposition of tiny particles in the electrolyte within the holes.
[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: A post-acid spraying rod device for preventing color difference on the foil surface in the production of lithium battery copper foil includes an acid spraying rod. The acid spraying rod adopts a cylindrical hollow cavity, and several sets of spray nozzles are radially symmetrically arranged on the outer side of the acid spraying rod. The diameter of the spray nozzles gradually increases from the middle of the acid spraying rod to both ends. The inner wall of the spray nozzles is provided with a conical guide surface. A heating tube is installed in the middle of the acid spraying rod, and the acid spraying rod is located inside a heat insulation shell. A liquid storage cavity is formed between the heat insulation shell and the acid spraying rod, and the liquid storage cavity is filled with heat insulation liquid.
[0007] Preferably, the acid spraying rod is connected at both ends by quick-release flanges.
[0008] Preferably, the middle part of the acid spraying rod is connected to an external delivery pipe.
[0009] Preferably, the spray nozzle's spray end is located on the outside of the insulation shell.
[0010] Preferably, the conical guide surface has an inclination angle of 15°-30°.
[0011] Preferably, the heat insulation shell includes an outer shell, and a heat insulation layer and a corrosion-resistant inner lining layer are fixedly disposed on the inner side of the outer shell.
[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention employs a cylindrical hollow cavity design for the acid spraying rod, ensuring uniform distribution of the electrolyte within the cavity. The electrolyte is then sprayed onto the cathode roller surface through radially symmetrical nozzles, guaranteeing complete coverage without dead zones. The nozzle orifice diameter gradually increases from the middle of the rod towards both ends to compensate for edge flow attenuation caused by fluid pressure loss, achieving uniform spraying across the entire width. Simultaneously, a heating element and a heat insulation shell are incorporated to raise the electrolyte temperature inside the acid spraying rod, preventing electrolyte crystallization and nozzle blockage. A tapered guide surface on the inner wall of the nozzle further reduces particulate matter retention.
[0013] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the internal structure of this utility model; Figure 2 This is a three-dimensional schematic diagram of the present invention; Figure 3 This is a frontal cross-sectional view of the present invention. Figure 4 This is a schematic diagram of the thermal insulation shell structure of this utility model.
[0015] Numbering on the map: 1. Acid spraying rod; 2. Spray nozzle; 3. Heating tube; 4. Insulation shell; 401. Outer shell; 402. Insulation layer; 403. Corrosion-resistant inner lining layer; 5. Liquid storage chamber; 6. External delivery pipe. Detailed Implementation
[0016] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the disclosure of the utility model more thorough and comprehensive.
[0017] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.
[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly associated with those skilled in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0019] Please refer to the appendix carefully. Figure 1-4 A post-acid spraying rod device for preventing color difference on the foil surface in the production of lithium battery copper foil. The acid spraying rod 1 adopts a cylindrical hollow cavity. The cylindrical hollow cavity can make the electrolyte evenly distributed in the cavity. Several sets of spray nozzles 2 (orifice diameter 0.5-2.0mm) are radially symmetrically arranged on the outer side of the acid spraying rod 1.
[0020] The nozzle 2 has an orifice diameter that gradually increases from the middle of the acid spraying rod 1 to both ends (e.g., 1.0 mm in the middle and 1.5 mm at both ends) to compensate for the edge flow attenuation caused by fluid pressure loss and achieve uniform spraying across the entire width. The inner wall of the nozzle 2 is provided with a conical guide surface or a chamfer. The conical guide surface has an inclination angle of 15°-30°. The conical guide surface or chamfer can reduce particulate matter retention, extend the maintenance cycle, and enhance process adaptability.
[0021] A heating tube 3 is installed in the middle of the acid spraying rod 1. The heating tube 3 can raise the temperature of the electrolyte inside the acid spraying rod 1, preventing the electrolyte from crystallizing and clogging the spray nozzle 2. The acid spraying rod 1 is located inside the heat insulation shell 4, and the spraying end of the spray nozzle 2 is located outside the heat insulation shell 4. A sealing structure is provided between the spray nozzle 2 and the heat insulation shell 4 to prevent the heat insulation liquid from flowing out from around the spray nozzle 2. A liquid storage chamber 5 is formed between the heat insulation shell 4 and the acid spraying rod 1. The liquid storage chamber 5 is filled with heat insulation liquid. The heat insulation liquid should be a liquid medium with a high specific heat capacity, such as silicone oil or ethylene glycol aqueous solution, to enhance the heat buffering capacity of the liquid storage chamber 5. The heat insulation liquid itself should have a low thermal conductivity to avoid forming a heat conduction path. The heat insulation liquid should be compatible with the material of the liquid storage chamber 5 to avoid corrosion or deterioration during long-term use.
[0022] The heat insulation shell 4 includes an outer shell 401, and an insulation layer 402 and an anti-corrosion inner lining layer 403 are fixedly provided on the inner side of the outer shell 401. The insulation layer 402 is made of a high thermal resistance material, which can effectively block the transfer of heat and reduce the impact of changes in external ambient temperature on the acid spraying rod 1.
[0023] The acid spraying rod 1 is connected at both ends by quick-release flanges. The middle part of the acid spraying rod 1 is connected to the external delivery pipe 6. The quick-release flange facilitates the quick replacement or adjustment of the spray nozzle 2 layout, and is compatible with cathode rollers of different widths of 600-1500mm. Electrolyte is delivered into the acid spraying rod 1 through the external delivery pipe 6.
[0024] The specific operating procedure of this utility model is as follows: After the electrolyte enters the acid spraying rod 1 through the external delivery pipe 6, it is evenly sprayed out through the spray nozzle 2 under pressure, covering the surface of the cathode roller. The conical guide surface helps to guide the electrolyte to spray out smoothly, reducing the risk of blockage. The heating tube 3 is used to regulate the temperature of the electrolyte. By precisely controlling the power of the heating tube 3, it can be ensured that the electrolyte reaches a suitable temperature range before spraying, thereby optimizing the spraying effect and reducing crystal formation. The setting of the heat insulation shell 4 and the heat insulation liquid reduces the influence of the external environment on the electrolyte temperature and improves the stability of temperature control.
[0025] The present invention has been described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.
Claims
1. A post-acid spraying rod device for preventing color difference on the foil surface during lithium battery copper foil production, comprising an acid spraying rod (1), characterized in that: The acid spraying rod (1) adopts a cylindrical hollow cavity, and several sets of spray nozzles (2) are radially symmetrically arranged on the outer side of the acid spraying rod (1). The diameter of the spray nozzles (2) gradually increases from the middle of the acid spraying rod (1) to both ends. The inner wall of the spray nozzles (2) is provided with a conical guide surface. A heating tube (3) is installed in the middle of the acid spraying rod (1), and the acid spraying rod (1) is located inside the heat insulation shell (4). A liquid storage cavity (5) is formed between the heat insulation shell (4) and the acid spraying rod (1). The liquid storage cavity (5) is filled with heat insulation liquid.
2. The post-acid spraying rod device for preventing color difference on the foil surface in the production of lithium battery copper foil according to claim 1, characterized in that: The acid spraying rod (1) is connected at both ends by quick-release flanges.
3. The post-acid spraying rod device for preventing color difference on the foil surface in the production of lithium battery copper foil according to claim 1, characterized in that: The middle part of the acid spraying rod (1) is connected to the external delivery pipe (6).
4. The post-acid spraying rod device for preventing color difference on the foil surface in the production of lithium battery copper foil according to claim 1, characterized in that: The spray nozzle (2) has its spray end located outside the insulation shell (4).
5. The post-acid spraying rod device for preventing color difference on the foil surface in the production of lithium battery copper foil according to claim 1, characterized in that: The conical guide surface has an inclination angle of 15°-30°.
6. The post-acid spraying rod device for preventing color difference on the foil surface in the production of lithium battery copper foil according to claim 1, characterized in that: The heat insulation shell (4) includes an outer shell (401), and a heat insulation layer (402) and an anti-corrosion inner lining layer (403) are fixedly provided on the inner side of the outer shell (401).