Crude foil equipment

Abstract

The utility model provides crude foil equipment. The crude foil equipment at least comprises an electrolytic bath and a cathode roller, at least part of the cathode roller is located in the electrolytic bath, and electrolyte is arranged between the surface of the side, facing the electrolytic bath, of the cathode roller and the electrolytic bath; the device further comprises an auxiliary cathode plate; the auxiliary cathode plate is fixed with the electrolytic bath, and the auxiliary cathode plate is made of titanium alloy. According to the utility model, the technical problem that copper is easy to deposit on the surface of the auxiliary cathode in the production process and the auxiliary cathode needs to be replaced regularly in the prior art can be avoided, so that the production cost can be reduced and the working efficiency can be improved at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to foil production equipment. Background Art

[0002] In the copper foil production industry, the production process of electrolytic copper foil mainly includes copper dissolution, foil production, surface treatment and slitting. Specifically, the copper dissolution process is to put the copper raw material into an acidic environment to dissolve it into copper sulfate electrolyte, while the foil production process is to use electrolytic reaction to convert copper ions in the electrolyte solution into copper element and deposit it on the titanium cathode roller, which is then peeled off to form copper foil.

[0003] In the production process of electrolytic copper foil, auxiliary cathode plays a vital role. Specifically, during the production process, the cathode roller is prone to copper growth and edge tearing due to excessive electroplating on the edge of the copper foil. In the relevant technology, "U"-shaped copper wire is generally used as an auxiliary cathode to deposit copper on the edge of the tank to ensure the product quality of the copper foil.

[0004] However, in the above solution, copper is easily deposited on the surface of the auxiliary cathode during the production process, and the auxiliary cathode needs to be replaced regularly. Utility Model Content

[0005] In view of the above problems, an embodiment of the utility model provides a foil production device, which can avoid the technical problem in the related art that copper is easily deposited on the surface of the auxiliary cathode during the production process and the auxiliary cathode needs to be replaced regularly, thereby reducing production costs while improving work efficiency.

[0006] In order to achieve the above purpose, the embodiment of the utility model provides the following technical solutions:

[0007] The utility model provides a foil production device, which at least comprises: an electrolytic cell and a cathode roller;

[0008] At least part of the cathode roller is located in the electrolytic cell, and electrolyte is present between a surface of the cathode roller facing the electrolytic cell and the electrolytic cell;

[0009] It also includes: an auxiliary cathode plate; the auxiliary cathode plate is fixed to the electrolytic cell, and the material used for the auxiliary cathode plate is titanium alloy.

[0010] In an optional embodiment, the auxiliary cathode plate is made of a titanium alloy material formed by combining titanium metal, tantalum metal and iridium metal.

[0011] In an optional embodiment, the auxiliary cathode plate includes: a substrate portion and a coating disposed on a surface of the substrate portion;

[0012] The material used for the substrate is titanium metal, and the material used for the coating is tantalum-iridium oxide formed by tantalum metal and iridium metal.

[0013] In an optional embodiment, a plurality of lyophobic holes are provided on the surface of the auxiliary cathode plate, and the lyophobic holes are used to allow electrolyte to flow through.

[0014] In an optional embodiment, a plurality of the liquid-repellent holes are evenly spaced apart on the surface of the auxiliary cathode plate.

[0015] In an optional embodiment, the inner diameter of each of the liquid-repellent holes is 3.5 mm-5 mm.

[0016] In an optional embodiment, the auxiliary cathode plate has a thickness of 1 mm-3 mm.

[0017] In an optional embodiment, it further includes: a power supply component; the power supply component is electrically connected to the auxiliary cathode plate.

[0018] In an optional implementation, the power supply component includes: a rectifier and a relay;

[0019] One end of the rectifier is connected to AC power, and the other end of the rectifier is connected to one end of the relay. The AC power enters the relay after being converted into DC power by the rectifier, and the other end of the relay is electrically connected to the auxiliary cathode plate.

[0020] In an optional implementation, the power supply component further includes: an external power supply; the external power supply is electrically connected to the relay.

[0021] The foil production equipment provided by the embodiment of the utility model has the following advantages:

[0022] The foil production equipment provided by the embodiment of the utility model at least comprises an electrolytic cell and a cathode roller, at least part of the cathode roller is located in the electrolytic cell, and there is electrolyte between the surface of the cathode roller facing the electrolytic cell and the electrolytic cell, by arranging an auxiliary cathode plate in the foil production equipment, the auxiliary cathode plate is fixed to the electrolytic cell, a positive reaction occurs on the surface of the auxiliary cathode plate, and copper ions are deposited on the surface of the auxiliary cathode plate, which can ensure uniform electroplating of the edge of the cathode roller and prevent defects such as copper particles. By designing the material used for the auxiliary cathode plate to be titanium alloy, the surface of the auxiliary cathode plate is easy to clean after copper is deposited, and the auxiliary cathode plate can be reused, thereby avoiding the technical problem of needing to regularly replace the auxiliary cathode plate.

[0023] Therefore, the utility model can avoid the technical problem in the related art that copper is easily deposited on the surface of the auxiliary cathode during the production process and the auxiliary cathode needs to be replaced regularly, thereby reducing production costs while improving work efficiency.

[0024] In addition to the technical problems solved by the embodiments of the utility model described above, the technical features that constitute the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions, other technical problems that can be solved by the batteries and electronic devices provided by the embodiments of the utility model, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail in the specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 A schematic structural diagram of a foil production device provided in an embodiment of the utility model.

[0027] Description of reference numerals:

[0028] 100-Foil production equipment;

[0029] 110-electrolyzer;

[0030] 120- cathode roller;

[0031] 130- auxiliary cathode plate;

[0032] 131- lyophobic hole;

[0033] 132-fixing hole;

[0034] 140-power supply component;

[0035] 141- alternating current;

[0036] 142-rectifier;

[0037] 143-direct current;

[0038] 144-Relay;

[0039] 145-External power supply. DETAILED DESCRIPTION

[0040] With the rapid development of the electronic information industry, the use of copper foil is increasing. Copper foil products are widely used in aerospace, communication equipment, lithium-ion batteries, new energy vehicles and other fields. Copper foil is divided into lithium battery copper foil and standard copper foil. Lithium battery copper foil, as an important component of the battery, acts as a carrier of negative electrode active materials and negative electrode current collector in the lithium battery structure. Standard copper foil is an important component of copper clad laminates and printed circuit boards.

[0041] In the copper foil production industry, the production process of electrolytic copper foil mainly includes copper dissolution, foil production, surface treatment and slitting. Among them, the copper dissolution process mainly involves placing the copper raw material into an acidic environment to dissolve into copper sulfate electrolyte, while the foil production process uses electrolytic reaction to convert copper ions in the electrolyte solution into copper element and deposit it on the titanium cathode roller, which is then peeled off to form copper foil.

[0042] At present, copper foil is generally produced by passing electrolyte into an anode tank equipped with an anode plate and applying electricity to electrolyze the electrolyte in the anode tank to form raw foil on the surface of a cathode roller body.

[0043] In the production process of electrolytic copper foil, auxiliary cathode plays a vital role. For example, during the production process, the cathode roller is prone to defects such as edge copper growth and edge tearing due to excessive electroplating on the edge of the copper foil.

[0044] Specifically, the copper foil production equipment is generally divided into two parts: the anode and the cathode. Electrolyte, such as copper sulfate solution, is placed in the electrolytic cells of the anode and the cathode. Through electrolysis, under the action of large direct current, metallic copper will be continuously precipitated and attached to the surface of the cathode roller. In this way, the copper foil can be continuously peeled off from the rotating cathode roller surface and rolled up by the winding roller.

[0045] However, since the copper on the side of the cathode roller cannot be stripped off, it will accumulate and become crystallized, seriously damaging the cathode roller. In addition, when making thin copper foil, the copper crystals accumulated on the side often cause the edge of the copper foil to crack and break.

[0046] In the related art, a "U"-shaped copper wire is generally used as an auxiliary cathode to deposit copper at the edge of the tank to ensure the product quality of the copper foil.

[0047] However, copper is easily deposited on the surface of the auxiliary cathode during the production process, and the auxiliary cathode needs to be replaced regularly.

[0048] Therefore, there is a need for a new foil production equipment that can improve the performance of the foil production equipment and solve the technical problems of the foil production equipment in the prior art.

[0049] After repeated thinking and verification, the inventor of the present application designed a new foil production equipment to solve the shortcomings of the relevant technology.

[0050] Specifically, the embodiment of the utility model provides a new foil production equipment, wherein the foil production equipment at least includes an electrolytic cell and a cathode roller, at least part of the cathode roller is located in the electrolytic cell, and there is electrolyte between the surface of the cathode roller facing the electrolytic cell and the electrolytic cell, and also includes: an auxiliary cathode plate; the auxiliary cathode plate is fixed to the electrolytic cell, and the material used for the auxiliary cathode plate is titanium alloy. The utility model can avoid the technical problem in the related art that copper is easily deposited on the surface of the auxiliary cathode during the production process, and the auxiliary cathode needs to be replaced regularly, thereby reducing production costs while improving work efficiency.

[0051] In order to make the above-mentioned purposes, features and advantages of the embodiments of the utility model more obvious and easy to understand, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0052] Figure 1 A schematic structural diagram of a foil production device provided in an embodiment of the utility model.

[0053] Reference Figure 1 As shown, an embodiment of the utility model provides a foil production device 100, which may include at least: an electrolytic cell 110 and a cathode roller 120, wherein at least a portion of the cathode roller 120 is located in the electrolytic cell 110, and an electrolyte is present between a side surface of the cathode roller 120 facing the electrolytic cell 110 and the electrolytic cell 110.

[0054] In the embodiment of the present invention, the foil production equipment 100 may further include: an auxiliary cathode plate 130 , wherein the auxiliary cathode plate 130 may be fixed to the electrolytic cell 110 .

[0055] In a possible implementation, the auxiliary cathode plate 130 may be disposed on one side of the electrolytic cell 110 , or the auxiliary cathode plate 130 may be disposed on both sides of the electrolytic cell 110 .

[0056] In addition, the auxiliary cathode plate 130 may be provided with a fixing hole 132 , and a fastener may pass through the fixing hole 132 to fix the auxiliary cathode plate 130 on the electrolytic cell 110 .

[0057] By setting an auxiliary cathode plate 130 in the foil production equipment 100, the auxiliary cathode plate 130 is fixed to the electrolytic cell 110, and a positive reaction occurs on the surface of the auxiliary cathode plate 130, and copper ions are deposited on the surface of the auxiliary cathode plate 130, which can ensure uniform electroplating on the edge of the cathode roller 120 and prevent defects such as copper particles.

[0058] It should be noted that, in some embodiments, the material used for the auxiliary cathode plate 130 may be titanium alloy.

[0059] By designing the auxiliary cathode plate 130 to be made of titanium alloy, the surface of the auxiliary cathode plate 130 can be easily cleaned after copper is deposited, so that the auxiliary cathode plate 130 can be reused, thereby avoiding the technical problem of requiring regular replacement of the auxiliary cathode plate 130 .

[0060] Specifically, during the production process, the cathode roller 120 serves as the cathode, the anode plate serves as the anode, and a certain flow of electrolyte such as copper sulfate electrolyte that has been filtered through multiple stages is continuously introduced into the electrolytic cell 110, and the cathode and cathode and the electrolyte therebetween form an electrolytic cell with the same inter-electrode distance.

[0061] After power is applied, copper ions, under the influence of the external electric field and additives, obtain electrons and become copper, which is deposited on the surface of the cathode roller 120 to form copper foil. 2+ +2e - =Cu, since the current density at the edge of the cathode roller 120 is higher, the edge is prone to copper growth to form single-sided copper particles. In the embodiment of the utility model, auxiliary cathode plates 130 are arranged on both sides of the electrolytic cell 110 to perform reduction reaction to precipitate Cu element, thereby balancing the copper growth at the edge caused by the high current density at the edge of the cathode roller 120.

[0062] Specifically, in the embodiment of the present invention, the auxiliary cathode plate 130 is made of a titanium alloy material formed by combining titanium metal, tantalum metal and iridium metal.

[0063] In the embodiment of the utility model, the auxiliary cathode plate 130 may include: a substrate portion and a coating disposed on the surface of the substrate portion, wherein the substrate portion may be made of titanium metal, and the coating may be made of tantalum-iridium oxide formed by tantalum metal and iridium metal.

[0064] It should be noted that, in some embodiments, the proportion of tantalum metal in the coating may be 44%, and the proportion of iridium metal may be 56%.

[0065] Of course, in some other embodiments, the relative proportions of tantalum metal and iridium metal in the coating of the auxiliary cathode plate 130 may also be other proportions, and the embodiments of the present invention are not limited to this, nor are they limited to the above examples.

[0066] In addition, it can be understood that, in the auxiliary cathode plate 130, the coating can be provided on one of the surfaces of the substrate portion, or the coating can also be provided on both surfaces of the substrate portion, and the embodiment of the present invention is not limited to this.

[0067] Continue to refer to Figure 1 As shown, in the embodiment of the present invention, a plurality of liquid-repelling holes 131 may be further provided on the surface of the auxiliary cathode plate 130 , and the liquid-repelling holes 131 may be used to allow electrolyte to flow through.

[0068] It should be noted that the plurality of liquid-repellent holes 131 may be evenly spaced apart on the surface of the auxiliary cathode plate 130 .

[0069] In the embodiment of the present invention, the inner diameter of each lyophobic hole 131 may be 3.5 mm-5 mm. For example, the inner diameter of each lyophobic hole 131 may be 3.5 mm, 4 mm, 4.5 mm or 5 mm, etc. The embodiment of the present invention is not limited to this, nor is it limited to the above examples.

[0070] In the embodiment of the present invention, the thickness of the auxiliary cathode plate 130 may be 1 mm to 3 mm. For example, the thickness of the auxiliary cathode plate 130 may be 1 mm, 1.5 mm, 2 mm, 2.5 mm or 3 mm, etc., and the embodiment of the present invention is not limited to this, nor is it limited to the above examples.

[0071] It should be noted here that the numerical values ​​and numerical ranges involved in this application are approximate values. Due to the influence of the manufacturing process, there may be a certain range of errors, which can be considered negligible by those skilled in the art.

[0072] It is understandable that the related art uses a "U"-shaped copper wire as an auxiliary cathode. The effective reaction contact area of ​​the "U"-shaped copper wire is small. In the embodiment of the utility model, by setting Figure 1 The auxiliary cathode plate 130 shown has a relatively large effective reaction contact area, which can improve the reaction efficiency. In addition, the auxiliary cathode plate 130 has a relatively large effective reaction contact area, which can more effectively solve the copper growth problem at the edge of the cathode roller 120 caused by the edge current density.

[0073] In some embodiments, the orthographic projection area of ​​the auxiliary cathode plate 130 on the side wall of the electrolytic cell 110 may account for more than 30% of the area of ​​the side wall corresponding to the electrolytic cell 110. For example, the orthographic projection area of ​​the auxiliary cathode plate 130 on the side wall of the electrolytic cell 110 may account for 30%, 35%, 40%, 45% or 50% of the area of ​​the side wall corresponding to the electrolytic cell 110.

[0074] In addition, it is understandable that the specific length and specific width of the auxiliary cathode plate 130 can also be flexibly designed according to the actual size of the electrolytic cell 110, and the embodiment of the utility model does not limit this.

[0075] In the embodiment of the present invention, the foil production equipment 100 may further include: a power supply component 140, wherein the power supply component 140 is electrically connected to the auxiliary cathode plate 130. The power supply component 140 is used to supply power to the auxiliary cathode plate 130.

[0076] Specifically, Figure 1 As shown, in an embodiment of the utility model, the power supply component 140 may include: a rectifier 142 and a relay 144, wherein one end of the rectifier 142 is connected to the alternating current 141, and the other end of the rectifier 142 is connected to one end of the relay 144, so that the alternating current 141 is converted into direct current 143 by the rectifier 142 and then enters the relay 144.

[0077] In the embodiment of the present utility model, Figure 1 As shown, the other end of the relay 144 is electrically connected to the auxiliary cathode plate 130 , so that the direct current 143 further enters the auxiliary cathode plate 130 after passing through the relay 144 to supply power to the auxiliary cathode plate 130 .

[0078] It is understandable that, in the embodiment of the present utility model, the power supply component 140 may further include: an external power supply 145 , wherein the external power supply 145 is electrically connected to the relay 144 .

[0079] It should be noted that the external power source 145 may be an external foil production equipment current module. In other words, the relay 144 is also electrically connected to the external foil production equipment current module.

[0080] In the embodiment of the utility model, the voltage applied to the auxiliary cathode plate 130 may be 5V-10V. For example, the voltage applied to the auxiliary cathode plate 130 may be 5V, 6V, 7V, 8V, 9V or 10V.

[0081] The current applied to the auxiliary cathode plate 130 may be 12A-18A. For example, the current applied to the auxiliary cathode plate 130 may be 12A, 13A, 14A, 15A, 16A, 17A or 18A.

[0082] Here, the working principle of the foil production device 100 provided in the embodiment of the utility model is described.

[0083] During the production process, the cathode roller 120 rotates for electroplating, and the alternating current 141 is converted into direct current 143 by the rectifier 142 and then enters the relay 144. One end of the relay 144 is connected to the auxiliary cathode plate 130, and the other end of the relay 144 is connected to the external foil production equipment current module. A forward reaction occurs on the surface of the auxiliary cathode plate 130, and copper ions are deposited on the surface of the auxiliary cathode plate 130, ensuring uniform electroplating on the edge of the cathode roller 120 and preventing defects such as copper particles.

[0084] In addition, during the surface polishing or up and down rolling process of the cathode roller 120 in the foil production equipment 100, the reverse current is replaced by controlling the switch of the relay 144, and a reverse reaction occurs on the surface of the auxiliary cathode plate 130. During normal production, the copper deposited on the surface of the auxiliary cathode plate 130 is dissolved and returned to the electrolyte.

[0085] In this way, during the surface polishing and roll changing interval of the cathode roller 120, the auxiliary cathode plate 130 is self-dissolved by reverse current. Compared with the related art, the embodiment of the utility model does not need to regularly replace the auxiliary cathode plate 130, which can reduce the purchase and recycling cost of the auxiliary cathode plate 130.

[0086] It should be noted that the forward reaction of the auxiliary cathode plate 130 is Cu 2+ +e - →Cu, the reverse reaction of the auxiliary cathode plate 130 is Cu-e - →Cu 2+ .

[0087] The foil production equipment 100 provided in the embodiment of the utility model may at least include an electrolytic cell 110 and a cathode roller 120, wherein at least a portion of the cathode roller 120 is located in the electrolytic cell 110, and an electrolyte is present between the surface of the cathode roller 120 facing the electrolytic cell 110 and the electrolytic cell 110. By arranging an auxiliary cathode plate 130 in the foil production equipment 100, the auxiliary cathode plate 130 is fixed to the electrolytic cell 110, a forward reaction occurs on the surface of the auxiliary cathode plate 130, and copper ions are deposited on the surface of the auxiliary cathode plate 130, thereby ensuring uniform electroplating of the edge of the cathode roller 120 and preventing defects such as copper particles.

[0088] By designing the auxiliary cathode plate 130 to be made of titanium alloy, the surface of the auxiliary cathode plate 130 can be easily cleaned after copper is deposited, so that the auxiliary cathode plate 130 can be reused, thereby avoiding the technical problem of requiring regular replacement of the auxiliary cathode plate 130 .

[0089] Therefore, the utility model can avoid the technical problem in the related art that copper is easily deposited on the surface of the auxiliary cathode during the production process and the auxiliary cathode needs to be replaced regularly, thereby reducing production costs while improving work efficiency.

[0090] The various embodiments or implementation methods in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other.

[0091] In the description of this specification, the description of reference terms such as "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0092] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents, and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A foil production device, characterized in that: At least: Electrolytic cell and cathode roller; At least part of the cathode roller is located in the electrolytic cell, and electrolyte is present between a surface of the cathode roller facing the electrolytic cell and the electrolytic cell; Also included: an auxiliary cathode plate; The auxiliary cathode plate is fixed to the electrolytic cell, and the material used for the auxiliary cathode plate is titanium alloy.

2. The foil production equipment according to claim 1, characterized in that: The auxiliary cathode plate comprises: a substrate portion and a coating disposed on a surface of the substrate portion; The material used for the substrate is titanium metal, and the material used for the coating is tantalum-iridium oxide formed by tantalum metal and iridium metal.

3. The foil production equipment according to claim 1, characterized in that: A plurality of lyophobic holes are disposed on the surface of the auxiliary cathode plate, and the lyophobic holes are used to allow electrolyte to flow through.

4. The foil production equipment according to claim 3, characterized in that: A plurality of the liquid-repelling holes are evenly spaced and arranged on the surface of the auxiliary cathode plate.

5. The foil production equipment according to claim 3, characterized in that: The inner diameter of each of the liquid-repellent holes is 3.5 mm to 5 mm.

6. The foil production equipment according to any one of claims 1 to 5, characterized in that: The thickness of the auxiliary cathode plate is 1 mm-3 mm.

7. The foil production equipment according to any one of claims 1 to 5, characterized in that: Also includes: A power supply component; the power supply component is electrically connected to the auxiliary cathode plate.

8. The foil production equipment according to claim 7, characterized in that: The power supply component includes: a rectifier and a relay; One end of the rectifier is connected to AC power, and the other end of the rectifier is connected to one end of the relay. The AC power enters the relay after being converted into DC power by the rectifier, and the other end of the relay is electrically connected to the auxiliary cathode plate.

9. The foil production equipment according to claim 8, characterized in that: The power supply component also includes: an external power supply; the external power supply is electrically connected to the relay.

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