CN120818867A - Copper foil production equipment - Google Patents

Abstract

The present invention discloses a copper foil production device, which relates to the technical field of copper foil production, comprising: an electrolyte cell, an outer wall of which is provided with a plurality of parallel and spaced anode conductive bars, wherein the extension direction of the anode conductive bars is parallel to the extension direction of the cathode roller; the negative pole of a power module group is electrically connected to the end of the cathode roller, and the positive pole of the power module group is electrically connected to the middle position of the anode conductive bar. According to the technical solution of the present invention, since the positive pole of the power module group is electrically connected to the middle position of the anode conductive bar, the paths of all currents from the positive pole of the power module group to the anode conductive bar, through the electrolyte to the cathode roller, and finally to the negative pole of the power module group are basically the same, so that copper ions are more evenly adsorbed on the cathode roller, thereby ultimately improving the uniformity of the copper foil thickness, reducing the difference in copper foil thickness, and improving the quality of copper foil products.

Description

Copper foil production facility

Technical Field

The invention relates to the technical field of copper foil production, in particular to copper foil production equipment.

Background

The foil producing machine is a core device for producing electrolytic copper foil, and the electrolytic deposition process of the foil producing machine comprises the steps that copper sulfate electrolyte continuously flows through an electrolytic area between an anode plate (anode) and a cathode roller (cathode) under the driving of a circulating system, a high-frequency switching power supply supplies direct current, cu ²⁺ in the electrolyte migrates to the surface of the cathode roller under the action of an electric field to obtain electrons, then the electrons are reduced to metallic copper (Cu ²⁺+2e^- =Cu), the metallic copper is gradually deposited to form copper foil, the cathode roller rotates at a constant speed, a new surface continuously enters the electrolytic area to be continuously deposited, the deposited copper foil is rotated out of the electrolytic area along with a roller body, and the deposited copper foil is peeled off by a peeling knife and then enters a subsequent treatment procedure.

The integrated structure of the power supply for the foil forming machine disclosed in the Chinese patent document CN217948302U comprises a foil forming machine and a plurality of power supply module groups, wherein the power supply module groups are uniformly distributed on the side edges of the foil forming machine, each power supply module group is arranged at an angle beta with the foil forming machine, the positive electrode of each power supply module group is connected with the positive electrode of the foil forming machine, and the negative electrode of each power supply module group is connected with the negative electrode of the foil forming machine.

In the scheme, the thickness of the copper foil is determined by the current density (current intensity of unit area) and the rotating speed of the cathode roller, namely, the thickness (mum) is approximately equal to (current density multiplied by time multiplied by electrochemical equivalent of copper)/the density of the copper, so that the target thickness (such as the common thickness of the lithium-ion copper foil of 3-12 μm) is realized by precisely controlling the two parameters.

However, in actual production, the current density at both ends of the cathode roll is high, so that the produced copper foil has the problems of thin middle and thick both sides.

Disclosure of Invention

In view of the above, the present invention provides a copper foil production apparatus to solve the problem of uneven thickness of the produced copper foil.

The invention provides copper foil production equipment, which comprises the following components:

the device comprises an electrolyte tank, wherein a rotatable cathode roller is arranged on the electrolyte tank, a plurality of anode conductive bars which are arranged in parallel at intervals are arranged on the outer wall of the electrolyte tank, and the extending direction of the anode conductive bars is parallel to the extending direction of the cathode roller;

the negative electrode of the power module group is electrically connected with the end part of the cathode roller, and the positive electrode of the power module group is electrically connected with the middle position of the anode conductive bar;

The positive electrode of the power module group is provided with a plurality of electric connection loops with equal path lengths from the anode conducting bar to the negative electrode of the power module group.

According to the technical scheme, the anodes of the power module groups are electrically connected with the middle position of the anode conducting bar, so that all currents flow from the anodes of the power module groups to the anode conducting bar, flow through electrolyte to the cathode roller and finally flow to the cathodes of the power module groups, paths of the same current paths mean that electrical parameters such as resistance and inductance are consistent in all current paths. This results in a more uniform distribution of current across the anode conductor bars, which in turn creates a more uniform electric field in the electrolyte. In the copper foil production process, the uniform electric field can guide copper ions to uniformly move towards the cathode roller, so that copper ions are more uniformly adsorbed onto the cathode roller, the uniformity of the thickness of the copper foil is finally improved, the thickness difference of the copper foil is reduced, and the quality of copper foil products is improved.

Optionally, the anode conductive bars are provided with a plurality of groups corresponding to the anode conductive bars one by one, the conductive copper bars are provided with extension plates attached to the anode conductive bars, and electric connection plates connected to the extension plates, and the electric connection plates are positioned in the middle of the anode conductive bars.

Optionally, each group of the conductive copper bars has two conductive members symmetrically arranged, wherein the first conductive member has a first electrical connection plate and a first extension plate, the second conductive member has a second electrical connection plate and a second extension plate, the first electrical connection plate and the second electrical connection plate are both located at a middle position of the anode conductive bar, and the first extension plate and the second extension plate extend towards opposite directions respectively.

In the above scheme, since the first extension plate and the second extension plate extend in opposite directions and are attached to the anode conductive bars, respectively, the current can be more uniformly spread on the anode conductive bars. This helps to create a more uniform electric field in the electrolyte area between the anode conductor bars and the cathode roll, directing the copper ions to move more uniformly toward the cathode roll and adsorb, further improving the uniformity of the copper foil thickness.

Optionally, the first electrical connection plate and the second electrical connection plate are connected against each other. That is, each group of conductive copper bars is composed of two conductive members symmetrically arranged, and among the two conductive members, the first electric connection plate and the second electric connection plate are connected in an abutting manner. The arrangement is such that the current output from the positive pole of the power module group can be uniformly distributed to the two conductive members.

Optionally, the power module group has multiple groups, and multiple groups of power module groups are symmetrically arranged relative to an X axis perpendicular to the rotation axis of the cathode roller. By the arrangement, when current flows from the symmetrical power module group to the cathode roller, symmetrical and uniform current distribution is formed on the surface of the cathode roller, and the uniform current distribution enables the deposition rate of copper ions on the surface of the cathode roller to be consistent. In the copper foil production process, the condition that the copper foil is thick on one side and thin on one side due to current non-uniformity can be effectively avoided, the uniformity of the thickness of the copper foil is obviously improved, and the quality of copper foil products is improved.

Optionally, the power module groups are symmetrically arranged relative to a Y-axis coaxial with the rotation axis of the cathode roller. The power supply modules are symmetrically arranged to form a redundant structure. If a certain power module group cannot work normally due to failure, other power module groups at symmetrical positions can share the power supply task, so that the current supply of the cathode roller is maintained, and the continuous production of the copper foil is ensured. The fault tolerance of the system is greatly enhanced, the probability of production interruption caused by the failure of a single power module group is reduced, the production loss is reduced, and the production efficiency is improved.

Optionally, there is a power module group at each of four corners of the cathode roll. By the arrangement, current can flow to the cathode roller from four different directions, and more uniform current coverage on the surface of the cathode roller is realized. Because the four corners are relatively dispersed and symmetrically distributed, the current can ensure the uniformity of the current density on the surface of the cathode roller to a large extent. In the copper foil production process, the uniform current density is beneficial to uniform deposition of copper ions on the surface of the cathode roller, so that the uniformity of the thickness of the copper foil is improved.

Optionally, the power module group is provided with a plurality of power modules arranged side by side, anodes of the power modules are connected through positive plates, and the positive plates are electrically connected with the anode conductive bars through conductive plates. So set up, increased power module quantity in the limited space to promoted the whole electric quantity reserves of power module group.

Optionally, the positive plate is provided with a plurality of positive electrode interfaces, and the positive electrode interfaces are electrically connected with the anode conductive bars in a one-to-one correspondence. So configured, current is precisely transferred to each anode lead via these interfaces so that the electric field between the anode lead and the cathode roll is more uniform and stable. The uniform and stable electric field can guide copper ions to move to the cathode roller more orderly and deposit, and further improve the quality and performance of the copper foil.

Optionally, the number of positive interfaces is greater than the number of power modules. The multiple positive interfaces enable the current to be distributed more uniformly on the anode conductive bars, and are helpful for constructing a more uniform electric field.

Alternatively, the negative electrodes of the plurality of power supply modules are connected by a negative electrode plate electrically connected to the end of the cathode roller. By the arrangement, a stable and unified current loop is constructed for the whole copper foil production system. In the loop, current reaches the cathode roller from the anode of the power module group through the conductive copper bar, the anode conductive bar and the electrolyte, and then is connected with the cathode of the power module through the negative plate to form a closed loop. The stable current loop ensures smooth flow of electrons and provides continuous and stable electric energy support for deposition of copper ions on the surface of the cathode roller.

Alternatively, the lengths of the two conductive plates symmetrical with respect to the Y axis coaxial with the rotation axis of the cathode roller are equal, and the lengths of the two conductive plates symmetrical with respect to the X axis perpendicular to the rotation axis of the cathode roller are equal. The conductive plates with equal lengths can ensure that the electric field is kept uniform in a symmetrical area, and avoid the quality problem of copper foil caused by distortion of the electric field, such as local excessive thickness or excessive thinness, uneven surface and the like.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 is a perspective view of a copper foil production apparatus according to an embodiment of the present invention;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a side view of FIG. 1;

FIG. 4 is a perspective view of one of the power modules of FIG. 3;

FIG. 5 is a perspective view of one of the anode conductive bars and the conductive copper bar of FIG. 3;

fig. 6 is a top view of a copper foil production apparatus according to an embodiment of the present invention.

Reference numerals illustrate:

1. an electrolyte bath; 2, a cathode roller, 3, a power module group, 4, a power module, 5, a positive plate, 6, a negative plate, 7, a positive electrode interface, 8, a negative electrode interface, 9, an anode conductive row, 10, a conductive plate, 11, a first conductive piece, 12, a first electric connection plate, 13, a first extension plate, 14, a second conductive piece, 15, a second electric connection plate, 16 and a second extension plate.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, or may be directly connected or indirectly connected via an intermediate medium. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.

As shown in fig. 1 and 2, a specific implementation manner of the copper foil production equipment provided in this embodiment includes an electrolyte tank 1, a cathode roller 2 and a power module group 3, wherein the cathode roller 2 is rotatably disposed on the electrolyte tank 1, and the power module 4 has a plurality of power modules disposed around the cathode roller 2 in a plan view. By doing so, it is possible to realize an omnibearing and more uniform current supply to the cathode roll 2. Specifically, the negative electrode of the power module group 3 is electrically connected to the end of the cathode roller 2.

As shown in fig. 3, the outer wall of the electrolyte tank 1 is provided with a plurality of anode conductive bars 9 arranged in parallel at intervals, and the extending direction of the anode conductive bars 9 is parallel to the extending direction of the cathode roller 2. That is, a plurality of anode conductive bars 9 are distributed on the outer wall of the electrolytic bath 1, and the anode conductive bars 9 are arranged in parallel with each other at a distance, and the extending direction thereof is consistent with the extending direction of the cathode roller 2. This arrangement allows the current to be injected uniformly into the electrolyte.

As shown in fig. 2, a plurality of electrical connection loops with equal path lengths are arranged between the positive electrode of the power module group 3 and the negative electrode of the power module group 3 through the anode conductive bar 9. By the arrangement, the density of all currents is consistent along the extending direction of the anode conductive bars 9, and the thickness of the copper foil is uniform. As shown in fig. 2, since any point of the anode conductive strip 9 reaches the cathode roller 2 via the electrolyte perpendicular to the anode conductive strip 9, there are a plurality of electrical connection paths, each of which may be a section of one electrical connection loop. The electric connection loop refers to a total loop in which the positive electrode of the power module group 3 reaches the negative electrode of the power module group 3 through any one electric connection path.

In this embodiment, the anode of the power module group 3 is electrically connected with the middle position of the anode conductive bar 9, so that under the condition that the power module group 3 outputs, the voltage that the anode conductive bar 9 reaches the cathode roller 2 through the electrical connection path is the same at any point, the electric field received by copper ions at each point is the same, and therefore copper ions migrate to the surface of the cathode roller 2 under the action of the electric field to be uniform, the uniformity of the thickness of copper foil is finally improved, the difference of the thickness of copper foil is reduced, and the quality of copper foil products is improved.

As shown in fig. 3 and 5, the anode conductive bars 9 are provided with conductive copper bars in a one-to-one correspondence manner, each conductive copper bar is provided with an extension plate attached to the anode conductive bar 9, and an electric connection plate connected to the extension plate and located in the middle of the anode conductive bar 9, and the electric connection plate of each conductive copper bar is electrically connected with the positive electrode of the power module group 3. That is, the anode conductive bars 9 are each provided with a conductive copper bar. The conductive copper bar comprises an extension plate attached to the anode conductive bar 9, and an electric connection plate is connected to the middle of the extension plate and electrically connected to the anode of the power module group 3.

Of course, the above description is not limiting, and in some alternative embodiments, the conductive copper bar may be omitted, and the positive electrode of the power module group 3 may be directly electrically connected to the middle position of the anode conductive bar 9.

The intermediate position is a position in the width direction in which the electrolytic solution tank 1 extends along the cathode roller 2, and the corresponding position is located at the right middle in the width direction. That is, the position of the anode electrode row 9 and the corresponding middle on the extension plate with respect to the width direction in which the electrolytic bath 1 extends along the cathode roller 2 is referred to as "intermediate position".

According to the technical scheme of the embodiment, as the electric connection plate is connected to the middle position of the extension plate, all currents flow from the positive electrode of the power module group 3 to the anode conductive bar 9, flow through the electrolyte to the cathode roller 2 and finally flow to the negative electrode of the power module group 3, the paths of the same current paths mean that the electric parameters such as resistance and inductance are relatively consistent in all current paths. This results in a more uniform distribution of the current over the anode conductor bars 9 and thus in a more uniform electric field in the electrolyte. In the copper foil production process, the uniform electric field can guide copper ions to uniformly move towards the cathode roller 2, so that copper ions are more uniformly adsorbed onto the cathode roller 2, the uniformity of the thickness of the copper foil is finally improved, the thickness difference of the copper foil is reduced, and the quality of copper foil products is improved.

As shown in fig. 5, in the present embodiment, each group of the conductive copper bars has two conductive members symmetrically disposed, wherein the first conductive member 11 has a first electrical connection plate 12 and a first extension plate 13, the second conductive member 14 has a second electrical connection plate 15 and a second extension plate 16, the first electrical connection plate 12 and the second electrical connection plate 15 are connected to each other in a abutting manner, and the first extension plate 13 and the second extension plate 16 extend in opposite directions, respectively.

That is, each group of conductive copper bars is composed of two conductive members symmetrically disposed, and the first and second electric connection plates 12 and 15 are connected to each other so that the current outputted from the positive electrode of the power module group 3 can be uniformly distributed to the two conductive members. Since the first extension plate 13 and the second extension plate 16 extend in opposite directions and are attached to the anode conductive strip 9, respectively, the current is more uniformly spread over the anode conductive strip 9. This helps to create a more uniform electric field in the electrolyte area between the anode conductor bar 9 and the cathode roll 2, guiding the copper ions to move more uniformly toward the cathode roll 2 and adsorb, thereby further improving the uniformity of the copper foil thickness.

Of course, the above description is not limiting, and in some alternative embodiments, the conductive copper bar may be provided with an entire extension board and an electrical connection board connected at a middle position of the entire extension board. Alternatively, the first electrical connection plate 12 and the second electrical connection plate 15 of the two conductive elements may not be connected in a contact-tight manner, i.e. may be arranged at a distance.

As shown in fig. 2, in this embodiment, there is one power module group 3 at each of four corners of the cathode roll 2. By the arrangement, current can flow to the cathode roller 2 from four different directions, and the surface of the cathode roller 2 is uniformly covered with the current. Because the four corners are relatively dispersed and symmetrically distributed, the current can ensure the uniformity of the current density on the surface of the cathode roller 2 to a large extent. During the copper foil production process, the uniform current density facilitates uniform deposition of copper ions on the surface of the cathode roll 2, thereby improving the uniformity of the copper foil thickness.

As shown in fig. 6, in some embodiments, the power module group 3 has a plurality of groups symmetrically arranged with respect to an X-axis perpendicular to the rotation axis of the cathode roll 2. That is, the distribution of the power module group 3 exhibits a vertically symmetrical state with respect to the X-axis. By this arrangement, it is possible to ensure that when current flows from the symmetrical power module group 3 to the cathode roll 2, symmetrical and uniform current distribution is formed on the surface of the cathode roll 2, and the uniform current distribution makes the deposition rate of copper ions tend to be uniform throughout the surface of the cathode roll 2. In the copper foil production process, the condition that the copper foil is thick on one side and thin on one side due to current non-uniformity can be effectively avoided, the uniformity of the thickness of the copper foil is obviously improved, and the quality of copper foil products is improved.

As shown in fig. 6, in some embodiments, the power module groups 3 are symmetrically disposed with respect to the Y-axis coaxial with the rotation axis of the cathode roll 2. That is, the power module groups 3 are symmetrically distributed with the Y-axis as the symmetry axis.

The power module groups 3 which are symmetrically arranged form a redundant structure. If a certain power module group 3 cannot work normally due to failure, the power module groups 3 at other symmetrical positions can share the power supply task, so that the current supply of the cathode roller 2 is maintained, and the continuous production of the copper foil is ensured. The fault tolerance of the system is greatly enhanced, the probability of production interruption caused by the faults of the single power module group 3 is reduced, the production loss is reduced, and the production efficiency is improved.

In addition, it should be noted that each of the power module groups 3 has a redundant design, that is, when one of the power modules 4 fails, the other power modules 4 of the group can typically supplement the loss by increasing power. Only when the power module group 3 cannot meet the power requirement, the power damage is supplemented by adopting the mode of improving the power of the power module group 3 on the symmetrical side.

As shown in fig. 4, in some embodiments, the power module group 3 has a plurality of power modules 4 disposed side by side, specifically three, and three power modules 4 are disposed side by side in the height direction. The positive electrodes of the plurality of power modules 4 are connected by positive plates 5, and the positive plates 5 and the anode conductive bars 9 are electrically connected by conductive plates 10. So set up, increased power module 4 quantity in the limited space to promoted the whole electric quantity reserves of power module group 3.

As shown in fig. 4, in some embodiments, the positive electrode plate 5 has a plurality of positive electrode interfaces 7 thereon, and the positive electrode interfaces 7 are electrically connected to the anode conductive bars 9 in a one-to-one correspondence. So arranged, the current is precisely transferred to the respective anode conductor bars 9 through these interfaces, so that the electric field between the anode conductor bars 9 and the cathode roll 2 is more uniform and stable. The uniform and stable electric field can guide copper ions to move to the cathode roller 2 more orderly and deposit, and further improve the quality and performance of the copper foil.

In this embodiment, the number of the positive electrode interfaces 7 is greater than the number of the power modules 4. The plurality of positive interfaces 7 makes the current more evenly distributed over the anode conductor bars 9, helping to build up a more uniform electric field.

As shown in fig. 4, the negative electrodes of the plurality of power modules 4 are connected by negative electrode plates 6, and the negative electrode plates 6 are electrically connected to the ends of the cathode roller 2. By the arrangement, a stable and unified current loop is constructed for the whole copper foil production system. In this circuit, the current reaches the cathode roller 2 from the positive electrode of the power module group 3 through the conductive copper bar, the anode conductive bar 9 and the electrolyte, and then is connected with the negative electrode of the power module 4 through the negative plate 6 to form a closed circuit. The stable current loop ensures a smooth flow of electrons, providing a continuous and stable electrical energy support for the deposition of copper ions on the surface of the cathode roll 2.

As shown in fig. 3 and 4, in some embodiments, the lengths of the two conductive plates 10 symmetrical with respect to the Y axis coaxial with the rotation axis of the cathode roll 2 are equal, and the lengths of the two conductive plates 10 symmetrical with respect to the X axis perpendicular to the rotation axis of the cathode roll 2 are equal. The conductive plates 10 having equal lengths can ensure that the electric field is maintained uniformly in the symmetrical region, and avoid the quality problems of the copper foil caused by distortion of the electric field, such as local excessive thickness or excessive thinness, uneven surface, and the like.

Working principle:

As shown in fig. 2, the current flows from the positive electrode of the power module group 3 to the anode conductive bar 9, and the current at the middle position on the anode conductive bar 9 enters the electrolyte tank 1 and then reaches the end of the cathode roller 2, and the current at the two sides reaches the end of the cathode roller 2 at the same distance.

The arrangement makes the current on the surface of the cathode roller 2 consistent, thereby realizing that copper ions are more uniformly adsorbed on the cathode roller 2 and avoiding the problem that copper ions are gathered at one end.

Although the embodiments of the present invention have been described with reference to the accompanying drawings, various modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope of the invention as defined by the claims.

Claims (11)

1. A copper foil production apparatus, comprising:

The device comprises an electrolyte tank (1), wherein a rotatable cathode roller (2) is arranged on the electrolyte tank (1), a plurality of anode conductive bars (9) which are arranged in parallel at intervals are arranged on the outer wall of the electrolyte tank (1), and the extending direction of the anode conductive bars (9) is parallel to the extending direction of the cathode roller (2);

The cathode of the power module group (3) is electrically connected with the end part of the cathode roller (2), and the anode of the power module group (3) is electrically connected with the middle position of the anode conducting bar (9);

The positive electrode of the power module group (3) is provided with a plurality of electric connection loops with equal path lengths from the anode conducting bar (9) to the negative electrode of the power module group (3).

2. The copper foil production equipment according to claim 1, further comprising a conductive copper bar having a plurality of groups corresponding to the anode conductive bars (9) one by one, the conductive copper bar having an extension plate attached to the anode conductive bars (9), and an electric connection plate connected to the extension plate, the electric connection plate being located at a middle position of the anode conductive bars (9).

3. Copper foil production facility according to claim 2, wherein each set of said conductive copper bars has two conductive members arranged symmetrically, wherein a first conductive member (11) has a first electrical connection plate (12) and a first extension plate (13), a second conductive member (14) has a second electrical connection plate (15) and a second extension plate (16), said first electrical connection plate (12) and said second electrical connection plate (15) being located in intermediate positions of said anode conductive bars (9), said first extension plate (13) and said second extension plate (16) extending towards opposite directions, respectively.

4. A copper foil production facility according to claim 3, wherein the first electrical connection board (12) and the second electrical connection board (15) are connected against each other.

5. Copper foil production equipment according to claim 1, wherein the power module group (3) has a plurality of groups, and a plurality of groups of the power module group (3) are symmetrically arranged with respect to an X-axis perpendicular to the rotation axis of the cathode roll (2).

6. The copper foil production apparatus according to claim 5, wherein a plurality of the power module groups (3) are symmetrically arranged with respect to a Y-axis coaxial with the rotation axis of the cathode roll (2).

7. The copper foil production apparatus according to claim 4, wherein each of four corners of the cathode roll (2) has a power module group (3).

8. Copper foil production facility according to any one of claims 1-7, wherein the power module group (3) has a plurality of power modules (4) arranged side by side, the anodes of the plurality of power modules (4) being connected by a positive plate (5), the positive plate (5) being electrically connected with the anode conductor bar (9) by a conductive plate (10).

9. The copper foil production equipment according to claim 8, wherein the positive plate (5) is provided with a plurality of positive electrode interfaces (7), and the positive electrode interfaces (7) are electrically connected with the anode conductive bars (9) in a one-to-one correspondence.

10. The copper foil production apparatus according to claim 8, wherein the negative electrodes of the plurality of power supply modules (4) are connected by a negative electrode plate (6), and the negative electrode plate (6) is electrically connected with an end portion of the cathode roll (2).

11. Copper foil production plant according to claim 8, wherein the lengths of the two conductive plates (10) symmetrical with respect to the Y axis coaxial with the rotation axis of the cathode roll (2) are equal, and the lengths of the two conductive plates (10) symmetrical with respect to the X axis perpendicular to the rotation axis of the cathode roll (2) are equal.