Device for preventing crystallization of rear acid spraying rod in lithium battery copper foil production

Abstract

The utility model discloses a device for preventing crystallization of a rear acid spraying rod in lithium battery copper foil production, which relates to the technical field of lithium battery copper foils and comprises an acid spraying rod and a sleeve, the sleeve is coaxially sleeved on the acid spraying rod, a flow channel is formed between the inner wall of the sleeve and the outer wall of the acid spraying rod, and a liquid spraying device is arranged in the flow channel. The liquid spraying device can spray electrolyte in the acid spraying rod out of the sleeve; the device for preventing the crystallization of the rear acid spraying rod in the lithium battery copper foil production can effectively avoid the crystallization of the spraying holes, eliminate the non-uniform color difference on the surface of the copper foil, improve the product quality, reduce the rejection rate, reduce the labor intensity of personnel and improve the production efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery copper foil, in particular to a device for preventing post-acid spraying rod crystallization in the production of lithium battery copper foil. Background Art

[0002] In the foil production process, in order to prevent the electrolyte from leaving traces on the surface of the cathode roller and affecting the surface quality of the copper foil, the electrolyte is usually sprayed at the entrance of the foil production machine tank body, which is commonly known as post-acid spraying in the industry. The function of post-acid spraying is to wash away the copper ions on the surface of the cathode roller, making the surface of the copper foil smooth and flat, and it is also conducive to the overflow of gas and prevent the generation of bubbles.

[0003] The post-acid spraying device is generally composed of an acid spray rod and an acid spray tube. The acid spray rod is a hollow metal tube with one end blocked and the other end open, connected to the electrolyte supply mechanism. The acid spray tube is a thin metal tube with one end extending into the acid spray rod and the other end penetrating the tube wall of the acid spray rod to form a spray hole. Multiple acid spray tubes are distributed in a ring shape on the acid spray rod. When the electrolyte flows from the acid spray rod into the acid spray tube, it will spray out from the spray hole to form a spray area covering the surface of the cathode roller.

[0004] However, due to the material properties of the additives used, foam is easily accumulated at the entrance of the titanium roller, which affects the overflow of gas on the one hand and makes the surface of the copper foil rough on the other hand. Both of these may leave marks of electrolyte on the surface of the cathode roller. Some deeper marks will form fingernail marks, affecting the appearance quality of the copper foil. In addition, during use, since the solution in the rear acid spray rod is mostly a dynamic liquid with high copper concentration, low pressure and slow flow rate; within a production cycle, due to small displacement and high copper concentration, the spray holes on the acid spray rod are prone to crystallization, making the solution unevenly covered on the cathode roller surface, and obvious light and dark color differences appear on the foil surface, resulting in waste. In order to solve this problem, it is usually necessary to shut down the machine regularly to clean the crystals on the acid spray rod, which increases the labor intensity of personnel and reduces production efficiency. Utility Model Content

[0005] The utility model aims to provide a device for preventing crystallization of post-acid spraying rods in the production of lithium battery copper foil. The device for preventing crystallization of post-acid spraying rods in the production of lithium battery copper foil can effectively avoid crystallization of spray holes, eliminate uneven color difference on the surface of copper foil, improve product quality, reduce scrap rate, reduce labor intensity, and improve production efficiency.

[0006] The above-mentioned optimized structure of the utility model is realized through the following technical scheme: a device for preventing crystallization of a post-acid spraying rod in the production of lithium battery copper foil, comprising an acid spraying rod and a sleeve, wherein the sleeve is coaxially sleeved on the acid spraying rod, and a flow channel is formed between the inner wall of the sleeve and the outer wall of the acid spraying rod, and deionized water with a certain temperature flows in the flow channel. A liquid spray device is arranged in the flow channel, and the liquid spray device can spray the electrolyte in the acid spraying rod to the outside of the sleeve.

[0007] In some embodiments, the liquid spraying device includes at least two spraying units, and the spraying unit includes at least three spraying pipes, one end of the spraying pipe extends into the acid spraying rod, and the other end passes through the sleeve, and the multiple spraying pipes are distributed in a ring shape.

[0008] In some embodiments, the distance between the inner wall of the sleeve and the outer wall of the acid spray rod is smaller than the inner radius of the acid spray rod.

[0009] In some embodiments, a heat insulation layer is provided outside the sleeve.

[0010] In some embodiments, the diameter of the spray pipe gradually decreases along the direction of the sleeve.

[0011] In some embodiments, the length of the sleeve is greater than the length of the acid spray rod.

[0012] In some embodiments, the acid spray rod includes a blocked end and an open end, and the open end is connected to an infusion device, and the infusion device can transport electrolyte into the acid spray rod.

[0013] In some embodiments, a temperature measuring device is provided on one side of the acid spray rod close to the blocking end.

[0014] In some embodiments, the inner diameter of the acid spray rod gradually decreases along the blocking end.

[0015] In summary, the utility model has the following beneficial effects:

[0016] The device for preventing the post-acid spray rod from crystallizing in the production of lithium battery copper foil is configured by setting a sleeve outside the acid spray rod to form a flow channel, and passing deionized water with a certain temperature into the flow channel, so that the acid spray rod is in a water bath state, thereby preventing the electrolyte from forming crystals to block the spray port, and making the electrolyte sprayed onto the surface of the cathode roller uneven, thereby avoiding light and dark color differences on the surface of the copper foil, thereby improving product quality; at the same time, it avoids regular shutdown to clean the crystals on the acid spray rod, thereby improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural diagram of the first perspective of the utility model;

[0018] Figure 2 This is a structural diagram of the second perspective of the utility model;

[0019] Figure 3 It is a side view of the utility model;

[0020] Figure 4 It is a cross-sectional view of the utility model along the AA line.

[0021] In the figure: 1, acid spray rod; 11, plugging end; 12, open end; 2, casing; 3, flow channel; 4, liquid spray device; 41, spray pipe. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] refer to Figure 1-4 A device for preventing post-acid spraying rod crystallization in lithium battery copper foil production comprises an acid spraying rod 1, a sleeve 2, and a liquid spraying device 4. The acid spraying rod 1 comprises a blocking end 11 and an open end 12. The inner diameter of the acid spraying rod 1 gradually decreases along the blocking end 11, which can increase the flow rate of electrolyte flowing out of the acid spraying rod 1; the open end 12 is connected with an infusion device, which can transport the electrolyte into the acid spraying rod 1; the sleeve 2 is coaxially sleeved on the acid spraying rod 1, and a flow channel 3 is formed between the inner wall of the sleeve 2 and the outer wall of the acid spraying rod 1. Both ends of the sleeve 2 are connected with a deionized water circulation device, which can pass deionized water with a certain temperature through the flow channel 3, so that the acid spraying rod 1 is in a water bath state, the temperature of the acid spraying rod 1 and the internal electrolyte is increased, and the electrolyte is prevented from forming crystals to block the spray port, so that the electrolyte sprayed onto the surface of the copper foil is uneven, thereby avoiding light and dark color difference on the surface of the copper foil, thereby improving product quality. A liquid spray device 4 is provided in the flow channel 3. The liquid spray device 4 can spray the electrolyte in the acid spray rod 1 to the outside of the sleeve 2. The liquid spray device 4 includes at least two spray units. The spray unit includes at least three spray pipes 41. The multiple spray pipes 41 are distributed in a ring shape. There can be four spray pipes 41, so that the sprayed electrolyte is more uniform; at the same time, it can serve as a fixed connection between the acid spray rod 1 and the sleeve 2, so that the force between the acid spray rod 1 and the sleeve 2 is more uniform; one end of the spray pipe 41 extends into the acid spray rod 1, and the other end passes through the sleeve 2, so that the electrolyte in the acid spray rod 1 is sprayed out from the spray port of the spray pipe 41.

[0024] In some embodiments, the distance between the inner wall of the sleeve 2 and the outer wall of the acid spray rod 1 is smaller than the inner radius of the acid spray rod 1, which can shorten the path of the electrolyte in the spray pipe 41 and enhance the force of the electrolyte spray.

[0025] In some embodiments, a heat insulating layer is provided outside the casing 2 to prevent the outside from affecting the temperature inside the casing 2, thereby affecting the water bath state of the acid spray rod 1 and further affecting the anti-clogging of the electrolyte at the spray port.

[0026] In some embodiments, the diameter of the spray pipe 41 gradually decreases along the direction of the sleeve 2, which can increase the speed of the spray pipe 41 spraying the electrolyte.

[0027] In some embodiments, the length of the sleeve 2 is greater than that of the acid spray rod 1, so that the acid spray rod 1 can be placed entirely in flowing deionized water, thereby ensuring the anti-clogging effect of the spray port.

[0028] In some embodiments, a temperature measuring device is provided on the side of the acid spray rod 1 close to the plugging end 11 to detect the temperature at the plugging end 11 so as to timely adjust the temperature of the deionized water when the temperature is too low to ensure the water bath temperature of the acid spray rod 1 and the temperature of the electrolyte.

[0029] The specific working principle is as follows:

[0030] Aim the spray port of the spray pipe 41 at the surface of the cathode roller, connect the infusion device with the open end 12, connect the deionized water circulation device in the sleeve 2, start the deionized water circulation device, and allow deionized water with a certain temperature to pass through the flow channel 3, so that the acid spray rod 1 is in a water bath state, and the deionized water and the acid spray rod 1 undergo heat exchange to increase the temperature of the acid spray rod 1. Start the infusion device, input the electrolyte into the acid spray rod 1, and the temperature of the electrolyte rises and is sprayed out through the spray pipe 41 to form a spray area, covering the surface of the cathode roller, and the acid spraying operation is completed.

[0031] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for preventing post-acid spraying rod crystallization in the production of lithium battery copper foil, comprising an acid spraying rod (1), Features: The invention also comprises a sleeve (2), wherein the sleeve (2) is coaxially sleeved on the acid spray rod (1), and a flow channel (3) is formed between the inner wall of the sleeve (2) and the outer wall of the acid spray rod (1), and deionized water with a certain temperature flows in the flow channel (3). A liquid spray device (4) is arranged in the flow channel (3), and the liquid spray device (4) can spray the electrolyte in the acid spray rod (1) to the outside of the sleeve (2).

2. A device for preventing post-acid spray rod crystallization in the production of lithium battery copper foil according to claim 1, Features: The liquid spraying device (4) comprises at least two spraying units, and the spraying unit comprises at least three spraying pipes (41). One end of the spraying pipe (41) extends into the acid spraying rod (1), and the other end passes through the sleeve (2). The plurality of spraying pipes (41) are distributed in a ring shape.

3. A device for preventing post-acid spray rod crystallization in the production of lithium battery copper foil according to claim 1, Features: The distance between the inner wall of the sleeve (2) and the outer wall of the acid spraying rod (1) is smaller than the inner radius of the acid spraying rod (1).

4. A device for preventing post-acid spray rod crystallization in the production of lithium battery copper foil according to claim 1, Features: The sleeve (2) is provided with a heat insulation layer outside.

5. A device for preventing post-acid spray rod crystallization in the production of lithium battery copper foil according to claim 2, Features: The diameter of the spray pipe (41) gradually decreases along the direction of the sleeve (2).

6. A device for preventing post-acid spray rod crystallization in the production of lithium battery copper foil according to claim 1, Features: The length of the sleeve (2) is greater than the length of the acid spray rod (1).

7. A device for preventing post-acid spray rod crystallization in the production of lithium battery copper foil according to claim 1, Features: The acid spray rod (1) comprises a blocking end (11) and an open end (12), wherein the open end (12) is connected to an infusion device, and the infusion device can transport electrolyte into the acid spray rod (1).

8. A device for preventing post-acid spray rod crystallization in the production of lithium battery copper foil according to claim 7, Features: A temperature measuring device is provided on one side of the acid spray rod (1) close to the blocking end (11).

9. A device for preventing post-acid spray rod crystallization in the production of lithium battery copper foil according to claim 7, Features: The inner diameter of the acid spray rod (1) gradually decreases along the direction of the blocking end (11).

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