Anode plate and anode tank for electrolytic copper foil with thickened edge part and variable proportion

Abstract

The utility model discloses an anode plate and an anode tank for an electrolytic copper foil with a thickened edge part and a variable proportion. The anode plate comprises an anode plate body (1), the two lug bosses (2) are formed on the edges of the two sides of the anode plate; and the insulating layer (3) is laid on the surface of the anode plate body between the two convex parts, and the insulating layer and the two convex parts are kept on the same horizontal plane. The anode plate for the electrolytic copper foil has the advantages that the thickness of the edge portion is increased by 10%-30% compared with the thickness of a normal foil face, continuous foil production of the ultra-thin copper foil is achieved, the rice number, rolling and the yield are improved, and the edge portion thickening proportion can be adjusted by setting the number of the anode plates for the electrolytic copper foil with different edge portion thickening variable proportions.

Description

TECHNICAL FIELD

[0001] The utility model relates to electrolytic copper foil technical field especially relates to a thickening variable proportion's anode plate and anode groove for electrolytic copper foil of edge part. BACKGROUND

[0002] High energy density, high power, high safety, low cost and other performances are the main trend of the development of lithium ion batteries for power and energy storage. By reducing the thickness of the negative electrode current collector copper foil, more space can be released to increase the amount of active material, thereby improving the energy density of the battery. At the same time, the reduction of copper foil weight can reduce the cost of the battery. Therefore, lithium copper foil is transitioning from the mainstream 8 microns, 6 microns to 3-5 microns ultra-thin copper foil. Ultra-thin copper foil is expected to become the application direction of the next generation of products, with broad research and development prospects. In the electrolytic foil production process, the edge of the copper foil is affected by uneven electric field, O-ring aging and deformation, four fluorine sealing, cathode roller edge oxidation, and other factors. The edge of the copper foil is extremely complex during the electrolysis process, and it is prone to breakage, copper plating, and tearing of the edge. The phenomenon of powder edge tearing greatly reduces the continuous foil yield and increases the overall cost.

[0003] Chai Zuqiang, Feng Qing, He Bin, et al. in Chinese invention patent [a kind of 2.5~6 μm ultra-thin electrolytic copper foil production anode plate] (CN114941162A) discloses an anode plate with edge treatment. The protrusions on the edge reduce the distance between the anode plates on both sides of the anode tank and the cathode roller, greatly improving the Faraday current efficiency. Under the same electroplating conditions, the generated copper foil is relatively thick, improving the mechanical properties of the copper foil edge and thereby suppressing the tearing of the edge during winding. This patent thickens the copper foil edge by changing the distance between the anode plate and the cathode roller. The thickness of the copper foil edge cannot be adjusted. UTILITY MODEL CONTENTS

[0004] The problem to be solved by the utility model is that the thickness of the copper foil cannot be adjusted. Therefore, a kind of anode plate with variable thickness of the edge of the electrolytic copper foil is provided.

[0005] The technical scheme of the utility model is as follows: a kind of anode plate with variable thickness of the edge of the electrolytic copper foil, comprising: an anode plate body; two protrusions, the two protrusions are formed on the two side edges of the anode plate; an insulating layer, the insulating layer is laid on the surface of the anode plate body between the two protrusions and kept on the same horizontal plane with the two protrusions.

[0006] In the above-mentioned scheme, the insulating layer is fixed to the anode plate body by an insulating nut.

[0007] In the above-mentioned scheme, the insulating layer is made of CPVC material.

[0008] An anode slot for electrolytic copper foil with variable proportion of thickened edge portion, comprising a plurality of anode plates, some of which are anode plates for electrolytic copper foil with variable proportion of thickened edge portion as described above.

[0009] The utility model discloses the beneficial effect is to make the edge position thickening 10%-30% than normal foil face thickness, realizes the continuous production of very thin copper foil, improves the rice number winding and the yield, can adjust the proportion of thickening of edge portion through setting the number of anode plate for electrolytic copper foil with variable proportion of thickened edge portion of different edge portion. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is the anode plate body schematic diagram of the utility model;

[0011] Figure 2 It is Figure 1 side view;

[0012] Figure 3 It is the anode slot schematic diagram of the utility model;

[0013] In the drawing, 1, anode plate body, 2, protruding portion, 3, insulating layer, 4, insulating nut, 5, ordinary anode plate. DETAILED DESCRIPTION

[0014] The utility model will be further described below in combination with the drawings.

[0015] As Figures 1-2 shown, an anode plate for electrolytic copper foil with variable proportion of thickened edge portion, comprising: anode plate body 1, two protruding portions 2, two protruding portions are formed at both side edges of the anode plate, and an insulating layer 3 is laid on the surface of the anode plate body between the two protruding portions and kept on a horizontal plane with the two protruding portions.

[0016] According to the Faraday plating principle, the protruding portion surface of the anode plate body is powered on, the protruding portion conductive position is locally reserved 15mm-30mm, the edge portion electric field effect is increased, so that the edge portion thickness is increased, the edge portion thickening is realized 5%-55%, the best thickening range value is 25%-40%, so that the continuous production of very thin copper foil is realized.

[0017] The production process is as follows: determine the thickness of electrolytic copper foil, install the number of anode plate bodies, and develop electrolytic foil. The insulating layer is not conductive, and the protruding portion surface is reserved 15mm normal conduction.

[0018] Requirements:

[0019] 1. The insulating layer and the protruding portion are flat, and the insulating nut has no obvious protrusion, the insulating layer and the conductive anode plate body are closely attached, and no electrolyte penetrates;

[0020] 2、Insulating layer thickness and material can be negotiated, require acid and alkali, high life, the thickness of the insulating layer can be 1mm, the base thickness of the anode plate body is 5mm, the height of the convex part is 1mm;

[0021] 3、The width of the conductive layer is 15±5mm, and the difference between the two sides is not more than 1mm;

[0022] 4、The insulating layer material is CPVC material;

[0023] 5、The insulating nut is made of insulating and temperature-resistant material;

[0024] 6、When working, according to the thickness of the raw foil, the number of such anode plates is 2-8.

[0025] As Figure 3 shown, example 1: foil on a 1380mm cathode roller foil machine, anode plate width 1384mm, anode plate body number 2, the rest is ordinary anode plate, foil 4.5 microns, average gram weight range 40.45g / m 2 , the actual gram weight at the convex part of 15mm is 43.95g / m 2 , the edge thickening is 8.65%, and the continuous rolling length is more than 30000m, accounting for 80%.

[0026] Example 2: foil on a 1380mm cathode roller foil machine, anode plate width 1384mm, anode plate body number 3, the rest is ordinary anode plate, foil 4.5 microns, average gram weight range 40.45g / m 2 , the actual gram weight at the convex part of 15mm is 45.35g / m 2 , the edge thickening is 12.11%, and the continuous rolling length is more than 30000m, accounting for 87%.

[0027] Example 3: foil on a 1380mm cathode roller foil machine, anode plate width 1384mm, anode plate body number 4, the rest is ordinary anode plate, foil 4.5 microns, average gram weight range 40.45g / m 2 , the actual gram weight at the convex part of 15mm is 47.8g / m 2 , the edge thickening is 18.17%, and the continuous rolling length is more than 30000m, accounting for 92%.

[0028] Example 4: foil on a 1380mm cathode roller foil machine, anode plate width 1384mm, anode plate body number 5, the rest is ordinary anode plate, foil 4.5 microns, average gram weight range 40.45g / m 2 , the actual gram weight at the convex part of 15mm is 50.35g / m 2, the edge thickening is 24.47%, and the continuous rolling length of more than 30,000 meters is 98%.

[0029] Example 5: Foil is produced on a 1380mm cathode roller foil machine, the anode plate width is 1384mm, the anode plate body number is 6, the rest is ordinary anode plate, the foil is 4.5 microns, and the average gram weight range is 40.45g / m 2 , the actual protrusion part is 15mm, and the gram weight is 53.35g / m 2 , the edge thickening is 31.89%, and the continuous rolling length of more than 30,000 meters is 98%.

[0030] Example 6: Foil is produced on a 1380mm cathode roller foil machine, the anode plate width is 1384mm, the anode plate body number is 7, the rest is ordinary anode plate, the foil is 4.5 microns, and the average gram weight range is 40.45g / m 2 , the actual protrusion part is 15mm, and the gram weight is 56.67g / m 2 , the edge thickening is 40.1%, and the continuous rolling length of more than 30,000 meters is 99%.

[0031] Example 7: Foil is produced on a 1380mm cathode roller foil machine, the anode plate width is 1384mm, the anode plate body number is 6, the rest is ordinary anode plate, the foil is 4.5 microns, and the average gram weight range is 40.45g / m 2 , the actual protrusion part is 15mm, and the gram weight is 61.21g / m 2 , the edge thickening is 51.3%, and the continuous rolling length of more than 30,000 meters is 92%.

[0032] The parameters of examples 1-7 are shown in the following table:

[0033]

[0034] It can be seen that by setting different anode plate body numbers, the proportion of copper foil edge thickening can be flexibly adjusted.

[0035] In the drawings, the positional relationship is only used for exemplary illustration, and cannot be understood as a limitation on the utility model; obviously, the above examples of the utility model are only examples for clearly illustrating the utility model, and are not a limitation on the implementation mode of the utility model. For ordinary skilled persons in the art, other different forms of changes or changes can be made on the basis of the above description. Here, it is not necessary and impossible to exhaust all the implementation modes. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. An anode plate for electrolytic copper foil production with a variable ratio of edge thickening, characterized by: The utility model relates to an electrolytic copper foil anode plate, comprising: an anode plate body (1); two convex parts (2) formed at the two side edges of the anode plate; an insulating layer (3) laid on the surface of the anode plate body between the two convex parts and kept in the same horizontal plane with the two convex parts.

2. The anode plate for electrolytic copper foil with variable proportion of thickened edge portion according to claim 1, characterized by: The insulating layer is fixed on the anode plate body by an insulating nut (4).

3. The anode plate for electrolytic copper foil with variable ratio of thickened edge portion according to claim 1, characterized by: The insulating layer is made of CPVC material.

4. An anode tank for electrolytic copper foil with a variable ratio of thickened edges, characterized by: The utility model relates to an electrolytic copper foil anode plate, comprising: an anode plate body (1); two convex parts (2) formed at the two side edges of the anode plate; an insulating layer (3) laid on the surface of the anode plate body between the two convex parts and kept in the same horizontal plane with the two convex parts. The insulating layer is fixed on the anode plate body by an insulating nut (4). The insulating layer is made of CPVC material. The utility model relates to an electrolytic copper foil anode plate, comprising: an anode plate body (1); two convex parts (2) formed at the two side edges of the anode plate; an insulating layer (3) laid on the surface of the anode plate body between the two convex parts and kept in the same horizontal plane with the two convex parts. The insulating layer is fixed on the anode plate body by an insulating nut (4). The insulating layer is made of CPVC material. The utility model relates to an electrolytic

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