Multi-channel anode plate conductive copper bar structure of electrolytic copper foil anode tank

Abstract

The utility model discloses a multi-channel type anode plate conductive copper bar structure of an electrolytic copper foil anode tank, which comprises a tank body and an anode plate assembly laid at the bottom of the tank body, a cathode roll shaft is transversely arranged on the upper side of the tank body, at least two sections of conductive areas are arranged on the outer side of the anode plate assembly along the axial direction of the cathode roll shaft, and the conductive areas are arranged on the outer side of the anode plate assembly. At least one group of conductive copper bar components is mounted in each conductive area, a plurality of anode power supply interfaces are dispersedly arranged on the conductive copper bar components, the conductive copper bar components and the plurality of anode power supply interfaces form a multi-channel power supply structure, current distribution is balanced by utilizing multi-channel power supply, the electrolytic efficiency is improved, and the electrolytic efficiency is improved. And the problem of non-uniform current distribution on the surface of the anode plate in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrolytic copper foil equipment, in particular to a multi-channel anode plate conductive copper bar structure of an electrolytic copper foil anode tank. Background Art

[0002] Electrolytic copper foil is an important material for the manufacture of copper clad laminate (CCL), printed circuit board (PCB), and lithium-ion battery. Its preparation process is to rotate the cathode roller connected to the negative pole of the power supply in an electrolytic cell filled with copper sulfate solution. An anode plate connected to the positive pole of the power supply is installed at the bottom of the electrolytic cell. Under the traction of the electric field, copper ions are deposited on the surface of the cathode roller, and then the cathode roller rotates out of the electrolytic cell. The copper foil is peeled off from the cathode roller by a stripping roller, trimmed, and rolled. The existing anode plate is generally composed of multiple anode plates, including a sheet anode plate, an arc bottom plate, a back-pull stud, an arc copper busbar, a normal copper busbar, and an axial copper busbar.

[0003] The conductive copper busbar of the anode plate is a key component in the production of electrolytic copper foil. The performance of the cathode electrodeposited copper foil is related to the current distribution on the surface of the anode plate. High-end electrolytic copper foil requires smaller and smaller performance deviations. However, conventional conductive copper busbars use an equal current transmission mode at both ends. The current is transmitted to the electrolytic cell through the arc copper busbar, normal copper busbar, and axial copper busbar, and then transmitted from the electrolytic cell to the arc bottom plate and anode plate. The current is severely unevenly distributed on the surface of the anode plate, showing a distribution pattern in which the current density is high at the end of the anode plate and low in the middle. This seriously affects the uniformity of the surface density of the finished copper foil and the life of the anode plate, and greatly reduces the current efficiency and energy efficiency of the electrolytic copper foil process. With the rapid development of electronic technology, improving the uniformity of the anode plate current is a key breakthrough point in the advancement of electrolytic copper foil technology. Utility Model Content

[0004] The utility model provides a multi-channel anode plate conductive copper bar structure of an electrolytic copper foil anode tank, which can solve the problem of serious uneven distribution of the anode plate surface caused by the current conductive copper bar power transmission mode.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a multi-channel anode plate conductive copper busbar structure of an electrolytic copper foil anode cell, comprising: a cell body, an anode plate assembly laid on the inner bottom of the cell body, a cathode roller shaft being laterally arranged on the upper side of the cell body, at least two conductive areas being arranged on the anode plate assembly corresponding to the outer side of the cell body along the axial direction of the cathode roller shaft, at least one group of conductive copper busbar assemblies being installed in each conductive area, a plurality of anode power supply interfaces being dispersedly arranged on the conductive copper busbar assembly, the conductive copper busbar assembly and the plurality of anode power supply interfaces forming a multi-channel power supply structure, the multi-channel power supply is utilized to balance the current distribution, thereby improving the electrolysis efficiency, and improving the problem of uneven current distribution on the surface of the anode plate existing in the prior art.

[0006] Preferably, all the conductive copper bar assemblies arranged outside the anode plate assembly are symmetrically arranged about a normal plane passing through the axial center position of the cathode roller, so that the current on each conductive copper bar assembly can be evenly distributed to the anode plate assembly.

[0007] Preferably, the conductive copper bar assembly comprises an axial conductive copper bar connected to the slot body along the axial direction of the cathode roller shaft, normal conductive copper bars bent at both ends of the axial conductive copper bar, and arc-shaped conductive copper bars connecting the normal conductive copper bars, for easy power connection.

[0008] Preferably, the anode power supply interface is arranged on the arc-shaped conductive copper busbar, and the anode power supply interface is located between adjacent normal conductive copper busbars, so that the current input to the anode power supply interface can be quickly separated from the adjacent normal conductive copper busbars and introduced into the anode plate assembly.

[0009] Preferably, two or more conductive areas are evenly arranged on the outer side of the anode plate assembly along the axial direction of the cathode roller shaft, and a group of conductive copper bar assemblies are arranged in each conductive area.

[0010] Preferably, the conductive area can be divided into two types of regional structures: nested and parallel, wherein the nested regional structure includes a primary conductive area arranged along the axial direction of the cathode roller and at least one secondary conductive area arranged inside the primary conductive area, and the conductive copper bar assembly installed in the secondary conductive area is nested with the conductive copper bar assembly installed in the primary conductive area. The parallel regional structure includes two or more conductive areas arranged side by side along the axial direction of the cathode roller shaft, and the above two regional structures are mirror-symmetrical relative to the center plane F of the cathode roller.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The structure is simple and reliable. The conductive copper busbars are respectively arranged in at least two conductive areas. The current is introduced from each area into the anode plate by shunting, so that the current density distribution on the surface of the anode plate is more uniform, the current density in the middle of the anode plate is increased, and the uniformity of the copper foil surface density is improved; at the same time, the smaller current density at the end of the anode plate reduces the loss rate of the precious metal coating and the surface density of the trimmed copper foil, saving raw materials and increasing the power efficiency. Therefore, the multi-channel anode plate conductive copper busbar of this patent has better application prospects and commercial value than the traditional two-end equal current transmission conductive copper busbar. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a three-dimensional structural diagram of a parallel dual-channel embodiment of the utility model;

[0014] Figure 2 for Figure 1 F-side cross-sectional view;

[0015] Figure 3 for Figure 1 A magnified structural diagram;

[0016] Figure 4 This is a bottom view of the structure of the utility model;

[0017] Figure 5 It is a structural schematic diagram of a parallel three-channel embodiment of the utility model;

[0018] Figure 6 for Figure 5 The enlarged structure diagram at B;

[0019] Figure 7 It is a structural schematic diagram of a nested three-channel embodiment of the utility model;

[0020] Figure 8 for Figure 7 The enlarged structure diagram at C;

[0021] Fig. 9 It is a graph of the experimental results of Example 1, Example 2 and the comparative example.

[0022] Reference numerals:

[0023] 1. Trough body, 2. Cathode roller shaft, 3. Anode plate assembly, 4. Conductive copper busbar assembly, 41. Axial conductive copper busbar, 42. Normal conductive copper busbar, 43. Arc-shaped conductive copper busbar, 44. Anode power supply interface, 5. Primary conductive area, 6. Secondary conductive area, F. Normal plane. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0025] The utility model aims to solve the problem that the current conductive copper bar power transmission mode causes serious uneven distribution on the surface of the anode plate. Figure 1-8 As shown, the following technical scheme is provided: a multi-channel anode plate conductive copper busbar structure of an electrolytic copper foil anode cell, comprising: a cell body 1, an anode plate assembly 3 laid on the inner bottom of the cell body 1, a cathode roller shaft 2 being laterally arranged on the upper side of the cell body 1, at least two conductive areas being arranged on the anode plate assembly 3 corresponding to the outer side of the cell body 1 along the axial direction of the cathode roller shaft 2, at least one group of conductive copper busbar assembly 4 being installed in each conductive area, a plurality of anode power supply interfaces 44 being dispersedly arranged on the conductive copper busbar assembly 4, a plurality of conductive copper busbar assemblies 4 forming a multi-channel power supply structure, using multi-channel power supply to balance current distribution, thereby improving electrolysis efficiency and improving the problem of uneven current distribution on the surface of the anode plate in the prior art.

[0026] In this embodiment, if Figure 3 As shown, the conductive copper bar assembly 4 includes an axial conductive copper bar 41 connected to the trough body 1 along the axial direction of the cathode roller shaft 2, normal conductive copper bars 42 bent at both ends of the axial conductive copper bar 41, and an arc-shaped conductive copper bar 43 connecting the normal conductive copper bar 42, for convenient power connection, wherein the normal conductive copper bar 42 and the axial conductive copper bar 41 are an integrally formed structure, which is obtained by stamping and bending a long straight copper bar, wherein the anode power supply interface 44 is arranged on the arc-shaped conductive copper bar 43, and the anode power supply interface 44 is located between adjacent normal conductive copper bars 42, so that the current input to the anode power supply interface 44 can be evenly separated from the adjacent normal conductive copper bars 42 and introduced into the anode plate assembly 3.

[0027] Specifically, the tank body 1, cathode roller shaft 2 and anode plate assembly 3 are all existing structures, the conductive copper bar assembly 4 can be installed and fixed with the tank body 1 by multiple screws, the anode power supply interface 44 is evenly arranged on the arc-shaped conductive copper bar 43 of the conductive copper bar assembly 4, and the anode power supply interface 44 on a single arc-shaped conductive copper bar 43 is powered by the same independent input power supply, the magnitude of the current can be adjusted independently, and any magnitude of current can be applied to the arc-shaped conductive copper bar 43 of each copper bar channel. There is no need to adopt the original method of supplying power equally from both ends of the conductive copper bar.

[0028] In this embodiment, if Figure 1 As shown, all the conductive copper busbar assemblies 4 arranged on the outside of the anode plate assembly 3 are symmetrically arranged about the normal plane F passing through the cathode roller shaft 2 toward the center position, so that the current on each conductive copper busbar assembly 4 can be evenly distributed to the anode plate assembly 3 through the slot body 1, wherein the position of the anode power supply interface 44 is also symmetrically arranged about the normal plane F.

[0029] like Figure 3 As shown, there are four groups of conductive copper busbar assemblies 4 arranged on the outside of the tank body 1, symmetrically arranged with respect to the normal plane F. When power is turned on, the input currents on the arc-shaped conductive copper busbar 43 on the conductive copper busbar assembly 4 close to the normal plane F are the same, and the input current on the arc-shaped conductive copper busbar 43 close to the normal plane F is greater than the input current on the arc-shaped conductive copper busbar 43 away from the normal plane, so that the current input into the anode plate assembly 3 can be ensured to be uniform.

[0030] In this embodiment, if Figure 7-8 As shown, the conductive area includes a primary conductive area arranged along the axial direction of the cathode roller axis and at least two secondary conductive areas arranged inside the primary conductive area, and the conductive copper bar assembly installed in the secondary conductive area is nested with the conductive copper bar assembly installed in the primary conductive area.

[0031] That is to say, the conductive copper bar assembly 4 installed in the secondary conductive area 6 is arranged inside the conductive copper bar assembly 4 in the primary conductive area 5 .

[0032] In this embodiment, 2-3 conductive areas are evenly arranged on the outer side of the tank body 1 along the axial direction of the cathode roller shaft 2, and a group of conductive copper bar components 4 are arranged in each conductive area.

[0033] Specific embodiment 1, such as Figure 1 and 4 As shown, a dual-channel anode plate conductive copper busbar can be used for electrolytic copper foil production. When the total current is 40000A, there are two groups of conductive copper busbar assemblies 4. The anode power supply interfaces 44 on the arc-shaped conductive copper busbars 43 on both sides of each group of conductive copper busbar assemblies 4 have current input. The total currents of the four rows of anode power supply interfaces 44 are 40000 / 6A, 40000 / 3A, 40000 / 3A, and 40000 / 6A, respectively. When the linear speed of the cathode roller 2 is 8m / min, 6μm copper foil is produced. When the flow rate of the liquid inlet is fully open, the surface density distribution of the copper foil from the gear end to the non-gear end is measured. One end of the cathode roller 2 is the gear end, and the other end is the non-gear end.

[0034] Specific embodiment 2, such as Figure 5-6 As shown, a three-channel anode plate conductive copper busbar can be used for electrolytic copper foil production, and three rows of conductive copper busbar assemblies 4 are used, which are also symmetrically arranged with respect to the normal plane F. Also, at a total current of 40000A, there are three groups of conductive copper busbar assemblies 4, and the anode power supply interfaces 44 on the arc-shaped conductive copper busbars 43 on both sides of each group of conductive copper busbar assemblies 4 have current input. The total currents of the six rows of anode power supply interfaces 44 are 5000A, 8000A, 7000A, 7000A, 8000A, and 5000A, respectively. When the linear speed of the cathode roller 2 is 8m / min, 6μm copper foil is produced. When the flow rate of the liquid inlet is fully open, the surface density distribution of the copper foil from the gear end to the non-gear end is measured.

[0035] In contrast, as a comparative example, compared with Examples 1 and 2, other parameters remain unchanged, only a traditional conductive copper bus is used, and a power transmission method with conduction at both ends is adopted. The total current at each end is 20000A, and the surface density distribution of the copper foil from the gear end to the non-gear end is also measured.

[0036] The measurement results of Example 1 and Example 2 are compared with the comparative example. Fig. 9 By comparing Example 1 with the comparative example, it can be found that the surface density of the copper foil end produced by using the patented dual-channel anode plate conductive copper busbar is reduced by about 4g / m 2 The surface density of the middle part increased by about 4g / m 2 , the surface density fluctuation is reduced.

[0037] By comparing Example 2 with the comparative example, it can be found that the surface density of the copper foil end produced by using the three-channel anode plate conductive copper busbar of the present invention is reduced by about 7g / m 2 The surface density of the middle part increased by about 6g / m 2 , the surface density fluctuation is further reduced.

[0038] Therefore, the copper foil prepared by the present invention can reduce the current loss at the edge of the copper foil and effectively distribute it to the middle area, thereby improving the power efficiency of the electrolytic copper foil device and making the copper foil surface density more uniform. The more channels there are, the more uniform the current density distribution is.

[0039] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0040] In addition, in the present invention, the descriptions of "primary", "secondary", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "primary" or "secondary" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0041] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A multi-channel anode plate conductive copper bar structure for an electrolytic copper foil anode cell, comprising: A trough body (1), an anode plate assembly (3) laid on the inner bottom of the trough body (1), a cathode roller shaft (2) being laterally arranged on the upper side of the trough body (1), characterized in that the anode plate assembly (3) is provided with at least two conductive areas along the axial direction of the cathode roller shaft (2) corresponding to the outer side of the trough body (1), at least one group of conductive copper busbar assemblies (4) is installed in each conductive area, and a plurality of anode power supply interfaces (44) are dispersedly arranged on the conductive copper busbar assembly (4).

2. The multi-channel anode plate conductive copper bar structure of the electrolytic copper foil anode cell according to claim 1, characterized in that: All the conductive copper bar assemblies (4) arranged outside the anode plate assembly (3) are symmetrically arranged about a normal plane (F) passing through the axial center position of the cathode roller.

3. The multi-channel anode plate conductive copper bar structure of the electrolytic copper foil anode cell according to claim 1 or 2, characterized in that: The conductive copper bar assembly (4) comprises an axial conductive copper bar (41) connected to the tank body (1) along the axial direction of the cathode roller shaft (2), normal conductive copper bars (42) bent and arranged at both ends of the axial conductive copper bar (41), and an arc-shaped conductive copper bar (43) connecting the normal conductive copper bar (42).

4. The multi-channel anode plate conductive copper bar structure of the electrolytic copper foil anode cell according to claim 3, characterized in that: The anode power supply interface (44) is arranged on the arc-shaped conductive copper busbar (43), and the anode power supply interface (44) is located between adjacent normal conductive copper busbars (42).

5. The multi-channel anode plate conductive copper bar structure of the electrolytic copper foil anode cell according to claim 2, characterized in that: Two or more conductive areas are evenly arranged on the outer side of the anode plate assembly (3) along the axial direction of the cathode roller shaft (2), and a group of conductive copper bar assemblies (4) are arranged in each conductive area.

6. The multi-channel anode plate conductive copper bar structure of the electrolytic copper foil anode cell according to claim 2, characterized in that: The conductive area comprises a primary conductive area (5) arranged along the axial direction of the cathode roller shaft (2) and at least two secondary conductive areas (6) arranged inside the primary conductive area (5); the conductive copper bar assembly (4) installed in the secondary conductive area (6) is nested with the conductive copper bar assembly (4) installed in the primary conductive area (5).

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