CN117144430B - Electrolytic roll, electrolytic device and battery production system - Google Patents
Electrolytic roll, electrolytic device and battery production system Download PDFInfo
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- CN117144430B CN117144430B CN202311415221.0A CN202311415221A CN117144430B CN 117144430 B CN117144430 B CN 117144430B CN 202311415221 A CN202311415221 A CN 202311415221A CN 117144430 B CN117144430 B CN 117144430B
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- roll
- roller
- electrolytic
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- semi
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 238000005868 electrolysis reaction Methods 0.000 claims description 25
- 230000002093 peripheral effect Effects 0.000 claims description 22
- 239000011810 insulating material Substances 0.000 claims description 13
- 238000002955 isolation Methods 0.000 claims description 11
- 230000008021 deposition Effects 0.000 abstract description 12
- 239000000758 substrate Substances 0.000 description 28
- 238000000576 coating method Methods 0.000 description 27
- 239000011248 coating agent Substances 0.000 description 22
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 11
- 239000000463 material Substances 0.000 description 10
- 239000011889 copper foil Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 239000003792 electrolyte Substances 0.000 description 6
- 239000011159 matrix material Substances 0.000 description 6
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 description 4
- 239000004020 conductor Substances 0.000 description 4
- 229910001431 copper ion Inorganic materials 0.000 description 4
- 239000011149 active material Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 229910000881 Cu alloy Inorganic materials 0.000 description 2
- 239000013543 active substance Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 229910000365 copper sulfate Inorganic materials 0.000 description 2
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 229910001316 Ag alloy Inorganic materials 0.000 description 1
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 1
- 229910002601 GaN Inorganic materials 0.000 description 1
- 229910005540 GaP Inorganic materials 0.000 description 1
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- -1 but not limited to Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- HZXMRANICFIONG-UHFFFAOYSA-N gallium phosphide Chemical compound [Ga]#P HZXMRANICFIONG-UHFFFAOYSA-N 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D1/00—Electroforming
- C25D1/04—Wires; Strips; Foils
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/661—Metal or alloys, e.g. alloy coatings
Abstract
The application relates to an electrolytic roll, electrolytic device and battery production system, including a plurality of roller portions that connect gradually along its axial, a plurality of roller portions connect gradually along the axial of electrolytic roll, and the roll surface of all roller portions sets up in succession, and wherein, electrolytic roll is configured to under the circular telegram state, and the roll surface electric current between two adjacent roller portions is inequality. In the technical scheme of the embodiment of the application, the thickness of the deposition layers deposited on the roller parts is different due to the roller parts with different roller surface currents, and the deposition layers with different thicknesses obtained by deposition are connected into a whole due to the fact that the roller surfaces of the roller parts are continuously arranged, so that the current collectors with different thicknesses can be prepared. When the current collectors with different thicknesses are used for preparing the pole pieces, the current collector part with larger thickness can be used as a blank area, so that the occurrence of the problems of wrinkling, breakage and the like of the current collector can be reduced, and the yield of the pole pieces is improved.
Description
Technical Field
The application relates to the technical field of electrolysis, in particular to an electrolysis roller, an electrolysis device and a battery production system.
Background
Electrolytic processes are a means of producing current collectors (e.g., copper foil) that are relatively simple in process and can be used for continuous and mass production in a roll-to-roll manner with great industrial application potential. At present, most of the existing electrolytic devices only can produce current collectors with uniform thickness, but cannot be suitable for the production of current collectors with uneven thickness.
Disclosure of Invention
In view of the above, the present application provides an electrolytic roll, an electrolytic device, and a battery production system that can be adapted to the production of a current collector having an uneven thickness.
In a first aspect, the present application provides an electrolytic roll comprising a plurality of roll portions connected in sequence along an axial direction thereof, the plurality of roll portions being connected in sequence along the axial direction of the electrolytic roll, roll surfaces of all roll portions being arranged in succession, wherein the electrolytic roll is configured such that, in an energized state, roll surface currents between two adjacent roll portions are unequal.
In the technical scheme of the embodiment of the application, the thickness of the deposition layers deposited on the roller parts is different due to the roller parts with different roller surface currents, and the deposition layers with different thicknesses obtained by deposition are connected into a whole due to the fact that the roller surfaces of the roller parts are continuously arranged, so that the current collectors with different thicknesses can be prepared. When the current collectors with different thicknesses are used for preparing the pole pieces, the current collector part with larger thickness can be used as a blank area, so that the occurrence of the problems of wrinkling, breakage and the like of the current collector can be reduced, and the yield of the pole pieces is improved.
In some embodiments, any two alternate roller sections are configured to have equal roller face currents. At this time, the current collectors with equal thickness between the blank areas and the coating areas and different thickness between the blank areas and the coating areas can be deposited on the electrolytic roller, and when the current collector is manufactured into the pole piece, the thickness of each blank area is larger, so that the probability of fracture and wrinkling of the current collector in the coating process can be further reduced, and the quality of the pole piece is improved.
In some embodiments, the axial widths of the respective roller portions having equal roller surface currents are equal, and the axial width of the roller portion having the larger roller surface current is smaller than the axial width of the roller portion having the smaller roller surface current in the adjacent two roller portions. In practical application, the thicker region is used as a blank area, the width of the blank area is small, the thinner region is used as a coating area, and the width of the coating area is large, so that the coating of active substances on the pole piece is improved, and the energy density of the pole piece is improved.
In some embodiments, all of the roller portions include a plurality of first roller portions disposed adjacent one another in sequence, each first roller portion including a first roller matrix. The first roller substrates of all the first roller sections are arranged in electrical series in the axial direction. At this time, each roller part is electrically connected in series through the first roller base body, and when an external power supply is connected, the connection conduction is shortened, and the electrifying cost is reduced.
In some embodiments, the at least one first roller portion further comprises a first semi-insulating layer overlying the outer peripheral surface of the first roller substrate, the outer surface of the first semi-insulating layer facing away from the first roller substrate acting as a roller surface for the first roller portion. At this time, by providing the first semi-insulating layer on the first roller base body of the first roller portion, the roller surface current of the first roller portion can be made different from the roller surface currents of other first roller portions, and the structure is simple and easy to realize.
In some embodiments, the outer peripheral surfaces of the first roller substrates of the adjacent two first roller portions are respectively provided with first semi-insulating layers having different thicknesses. At this time, when the adjacent two first roller portions each include the first semi-insulating layer, the thickness of each first semi-insulating layer is made different, and the roller surface currents of each first roller portion can be made different.
In some embodiments, the outer circumferential surface of the first roller matrix of at least one first roller section is present as the roller surface of the first roller section where it is located. Therefore, the consumable of the first semi-insulating layer can be reduced, and the preparation cost of the electrolytic roller is reduced.
In some embodiments, the first roller matrix of all of the first roller portions is integrally formed. At this time, each first roller matrix is integrated into one piece, can simplify the course of working of electrolytic roll, need not other means to assist in realizing the electricity series connection setting of each first roller matrix moreover, electrolytic roll's structure is simpler.
In some embodiments, all of the roller portions include a plurality of second roller portions disposed in sequence in an axial direction, each of the second roller portions including a second roller matrix, the second roller matrices of each of the second roller portions being disposed in electrical parallel; and one of any two adjacent second roller parts further comprises an isolation layer, wherein the isolation layer comprises an insulating inner layer and a semi-insulating outer layer, the semi-insulating outer layer is covered on the outer peripheral surface of the insulating inner layer, and the semi-insulating outer layer are connected between the second roller matrixes of the two adjacent second roller parts. At this time, the second roller substrates of the second roller parts are arranged in parallel, the electric isolation between the second roller substrates is realized through the insulating inner layer of the isolating layer, and the continuity of the deposition layer on each second roller substrate is realized through the semi-insulating outer layer, so that current collectors with different thicknesses can be continuously prepared.
In some embodiments, the entire roller portion includes a third roller portion and a fourth roller portion disposed at an intersection in the axial direction, the third roller portion and the fourth roller portion being disposed in electrical parallel, wherein the third roller portion is a piece of semi-insulating material. At this time, a coating region having a small thickness may be deposited on the roll surface of the third roll portion, and a blank region having a large thickness may be deposited on the roll surface of the fourth roll portion, thereby obtaining current collectors having different thicknesses.
In a second aspect, the present application provides an electrolysis apparatus comprising an electrolysis roll as described above.
In a third aspect, the present application provides a battery production system comprising an electrolysis device as described above for preparing a current collector.
The foregoing description is only an overview of the technical solutions of the present application, and may be implemented according to the content of the specification in order to make the technical means of the present application more clearly understood, and in order to make the above-mentioned and other objects, features and advantages of the present application more clearly understood, the following detailed description of the present application will be given.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the accompanying drawings. In the drawings:
FIG. 1 is a schematic view of an electrolytic roll in one or more embodiments;
FIG. 2 is a schematic cross-sectional view of a current collector in one or more embodiments;
FIG. 3 is a schematic cross-sectional view of an electrolytic roll of one or more embodiments;
FIG. 4 is a schematic cross-sectional view of an electrolytic roll of one or more embodiments;
FIG. 5 is a schematic cross-sectional view of an electrolytic roll of one or more embodiments;
FIG. 6 is a schematic cross-sectional view of an electrolytic roll in one or more embodiments.
Reference numerals in the specific embodiments are as follows:
10. an electrolytic roller; 10A, a roller part; 10B, a roll shaft; F. axial direction; m, roller surface; 11. a first roller section; 11a, a first roller base; 11b, a first semi-insulating layer; 12. a second roller section; 12a, a second roller base; 12b, an isolation layer; b1, an insulating inner layer; b2, a semi-insulating outer layer; 13. a third roller section; 14. a fourth roller section; 15. a power receiving member; J. a current collector; j1, a coating area; and J2, leaving a white area.
Detailed Description
Embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical solutions of the present application, and thus are only examples, and are not intended to limit the scope of protection of the present application.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description and claims of the present application and in the description of the figures above are intended to cover non-exclusive inclusions.
In the description of the embodiments of the present application, the technical terms "first," "second," and the like, if any, are used merely to distinguish between different objects and should not be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
In the description of the embodiments of the present application, if the term "and/or" appears as only one association relationship describing the association object, it means that three relationships may exist, for example, a and/or B may be represented: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the associated object is an "or" relationship, if any.
In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two), and similarly, "multiple" refers to two or more (including two), and "multiple" refers to two or more (including two).
In the description of the embodiments of the present application, if any, the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are directional or positional relationships indicated based on the drawings, and are merely for convenience of description and simplicity of 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 therefore should not be construed as limiting the embodiments of the present application.
In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like should be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to the specific circumstances.
In the pole piece coating process, an active material is coated on a coating region of a current collector, and a region where the active material is not coated is called a blank region, and the blank region is used for manufacturing/connecting a tab. In the case of a current collector used for coating, the thickness of the current collector is generally uniform throughout, and if the thickness of the current collector is small, a blank area is liable to be wrinkled or even broken by pulling when the current collector is guided by a pull roll to travel in a coating process. To overcome this problem, if the current collector thickness is increased, the pole piece volume is increased, and the battery energy density is reduced.
In order to reduce the problems of wrinkling, breakage and the like of the blank area of the current collector in the coating process, the thickness of the blank area can be increased, so that the capability of the blank area for resisting wrinkling and breakage can be improved, that is, the problems can be solved by preparing the current collectors with unequal thicknesses of the coating area and the blank area (the section is reviewed, only background information is used, and the prior art is not formed).
Electrolytic processes are a means of producing current collectors (e.g., copper foil) that are relatively simple in process and can be used for continuous and mass production in a roll-to-roll manner with great industrial application potential. At present, most of the existing electrolytic devices only can produce current collectors with uniform thickness, but cannot be suitable for the production of current collectors with uneven thickness.
In order to provide an electrolysis device which can adapt to current collectors with uneven thickness, the embodiment of the application designs an electrolysis roller, the main invention concept is that the electrolysis roller is divided into a plurality of sections of roller parts with unequal roller surface currents in the axial direction of the electrolysis roller, in the electrolysis process, the thickness of the current collector layer deposited on the roller surface of each roller part is uneven within the same time due to the unequal roller surface currents of each section of roller part, so that the current collectors with uneven thickness can be continuously prepared by an electrolysis method, the current collectors with uneven thickness are used as blank areas in thicker areas when pole pieces are prepared by utilizing the current collectors with uneven thickness, and the thickness of the blank areas is larger, so that the pole pieces are not easy to wrinkle and break, and the quality of the pole pieces is improved.
The electrolytic device disclosed in the embodiment of the application is a device for producing a current collector in a roll-to-roll manner based on an electrolytic method. Typically, but not limited to, the electrolytic device includes an anode tank, an electrolyte, and the like in addition to the electrolytic roll provided in the embodiments of the present application as a cathode roll of the electrolytic device. The electrolyte is contained in the anode tank, and the electrolytic roller is at least partially arranged in the anode tank. Taking electrolytic copper foil as an example, the anode tank body can be made of silver alloy, and the electrolyte can be copper sulfate electrolyte. The anode tank body is connected with the positive electrode of the power supply, the electrolytic roll is connected with the negative electrode of the power supply, and in the electrolytic process, copper ions in the electrolyte continuously obtain electrons to crystallize on the surface of the electrolytic roll, and copper foil with required thickness is gradually deposited. Of course, the electrolytic device may also include a device/mechanism for rolling and post-treating the deposited copper foil, and reference may be made to the conventional arrangement of the electrolytic device.
The battery production system disclosed by the embodiment of the application comprises the electrolysis device. The use of an electrolysis device can be used to produce a current collector coil. The current collector may be, but is not limited to, copper foil, aluminum foil, etc. In addition, the battery production system may further include a coating device for coating an active material on the current collector produced by the electrolysis device to prepare a pole piece. Of course, the battery production system may also include the remaining devices, and in particular conventional arrangements may be made.
The electrolytic roll provided in the embodiments of the present application will be described in detail.
FIG. 1 is a schematic view of an electrolytic roll 10 in one or more embodiments.
According to one or more embodiments of the present application, please refer to fig. 1, an electrolytic roll 10 provided in the embodiments of the present application includes a plurality of roll portions 10A sequentially connected along an axial direction F thereof, the plurality of roll portions 10A sequentially connected along the axial direction F of the electrolytic roll 10, and roll surfaces M of all the roll portions 10A are continuously disposed, wherein the electrolytic roll 10 is configured such that, in an energized state, roll surface currents between two adjacent roll portions 10A are unequal.
The electrolytic roll 10 has a substantially cylindrical or cylindrical shape and is rotatable about its axial direction F. Typically the electrolytic roll 10 is applied as a cathode roll in an electrolysis apparatus.
The electrolytic roll 10 is divided along the axial direction F into a plurality of roll portions 10A, and the roll portions 10A are connected to each other in sequence. The roll surface M of the roll portion 10A is an outer circumferential surface provided around the axial direction F of the electrolytic roll 10, and is a circumferential surface. The roll surfaces M of all the roll portions 10A constitute the roll surfaces M of the electrolytic roll 10. The roll surfaces M of all the roll portions 10A are continuously arranged, which means that the roll surfaces M of adjacent roll portions 10A are directly connected and are not spaced apart from each other. It will be appreciated that the projections of the roll surfaces M of the respective roll portions 10A are coincident with each other along the axial direction F of the electrolytic roll 10.
In the energized state, the electrolytic roll 10 is connected to the negative electrode of the power source, and the electric charges are passed through the roll surface M of each roll portion 10A to form an electric current. The current is not equal between the roll surfaces M of the adjacent roll portions 10A. Specifically, but not limited to, the roll surface currents of the respective roll portions 10A in the energized state may be measured using an electric current measuring device (e.g., a multimeter, ammeter), and whether the roll surface currents of the respective roll portions 10A are unequal may be determined based on the measurement results. The roll surface current may be varied between any one or more of the adjacent roll portions 10A.
Taking the electrolyte in the electrolytic device as copper sulfate for example, when copper ions move to the roll surface M of each roll portion 10A of the electrolytic roll 10, the greater the roll surface current, the faster the copper ions deposit on the roll surface M to obtain a copper foil layer, whereas the smaller the roll surface current, the slower the copper ions deposit on the roll surface M to obtain a copper foil layer. Thus, the greater the roll surface current, the greater the thickness of the deposited layer deposited by the roll portion 10A at the same time.
In the electrolytic roll 10, the thickness of the deposited layers deposited on the roll portions 10A is different due to the roll portions 10A having the different roll surface currents, and the deposited layers having the different thicknesses are integrally connected due to the continuous arrangement of the roll surfaces M of the roll portions 10A, so that the current collectors J having the different thicknesses can be produced. When the current collectors J with different thicknesses are used for preparing the pole pieces, the current collector J part with larger thickness can be used as a blank zone J2, so that the occurrence of the problems of wrinkling, breakage and the like of the current collector J can be reduced, and the yield of the pole pieces is improved.
In some embodiments, any two alternate roller sections 10A are configured to have equal roller face currents.
The two alternate roller portions 10A are two roller portions 10A provided adjacently on opposite sides in the axial direction F of the same roller portion 10A. The equal roll surface currents of the two roll portions 10A at any intervals indicate that the thickness of the current collector J deposited on the two roll portions 10A at any intervals is the same during electrolysis. It is understood that the roll surface current of the roll portion 10A located between the two roll portions 10A that are spaced apart is not equal to the roll surface current of the "two roll portions 10A that are spaced apart".
Fig. 2 is a schematic cross-sectional view of a current collector J in one or more embodiments. The cross section of the current collector J shown in fig. 2 is perpendicular to the longitudinal direction thereof. When the roll surface currents of the two roll portions 10A at any interval are equal, a current collector J structure having a cross section as shown in fig. 2 can be deposited on the electrolytic roll 10. In the current collector J structure shown in fig. 2, a region having a smaller thickness is used as the coating region J1, and a region having a larger thickness is used as the blank region J2.
At this time, the current collectors J with equal thickness between the blank areas J2 and the coating areas J1 and unequal thickness between the blank areas J2 and the coating areas J1 can be deposited on the electrolytic roller 10, and when the current collector J is used for manufacturing a pole piece, the thickness of each blank area J2 is larger, so that the probability of fracture and wrinkling of the current collector J in the coating process can be further reduced, and the quality of the pole piece is improved.
In some embodiments, the axial widths of the respective roller portions 10A having equal roller surface currents are equal, and the axial width of the roller portion 10A having a larger roller surface current is smaller than the axial width of the roller portion 10A having a smaller roller surface current in the adjacent two roller portions 10A.
The axial width of the roller portion 10A is the shortest distance between both ends of the roller portion 10A in the axial direction F. In general, both ends in the axial direction F of the roller portion 10A are parallel to each other. The equal axial width of the roll portion 10A with equal roll surface current allows to deposit a current collector J region of equal thickness and width, such as a current collector J of equal thickness and width of the coating region J1.
The axial width of the roll portion 10A with a larger roll surface current is smaller than that of the roll portion 10A with a smaller roll surface current, and a current collector J with a thicker deposited layer having a smaller width than that of the thinner deposited layer can be obtained on the electrolytic roll 10. In practical application, the thicker area is used as the blank area J2 and has a small width, the thinner area is used as the coating area J1 and has a large width, and the coating of active substances on the pole piece is facilitated to be improved, so that the energy density of the pole piece is improved.
FIG. 3 is a schematic cross-sectional view of an electrolytic roll 10 of one or more embodiments.
In some embodiments, referring to fig. 3, all the roller portions 10A include a plurality of first roller portions 11 disposed adjacent to each other in sequence, and each of the first roller portions 11 includes a first roller base 11a. The first roller bodies 11a of all the first roller portions 11 are disposed electrically in series in the axial direction F.
The first roller base 11a is substantially roller-shaped, and is cylindrical and columnar around the axial direction F of the electrolytic roller 10. The respective first roller bases 11a should be rotated synchronously.
The first roller substrates 11a are electrically connected in series, which means that a current flows through each first roller substrate 11a in sequence in the energized state of the electrolytic roller 10. It is understood that each first roller base 11a is a conductor, and the material for preparing the same may be selected from pure copper, copper alloy, etc., and the material for the first roller base 11a is specifically selected according to the material to be deposited, which will not be described herein.
The arrangement of the first roller bodies 11a in electrical series may be, but not limited to, direct electrical connection between the first roller bodies 11a, or electrical series connection between the first roller bodies 11a via wires.
At this time, the roller portions 10A are electrically connected in series by the first roller base 11a, which contributes to shortening the connection conduction and reducing the energizing cost when an external power source is connected.
In some embodiments, the at least one first roller portion 11 further includes a first semi-insulating layer 11b covering the outer peripheral surface of the first roller base 11a, and the outer surface of the first semi-insulating layer 11b facing away from the first roller base 11a serves as the roller surface M of the first roller portion 11.
The first semi-insulating layer 11b is a layer structure formed of a semi-insulating material. The outer peripheral surface of the first roller base 11a is a peripheral surface provided around the axial direction F of the electrolytic roller 10, the first semi-insulating layer 11b is provided around the outer peripheral surface of the first roller base 11a, and the outer surface thereof is configured as a roller surface M of the first roller portion 11. That is, the current of the outer surface of the first semi-insulating layer 11b serves as the roll surface current of the first roll portion 11 where it is located.
The semi-insulating material is a material which is conductive at normal temperature between the conductor and the insulating material, and can be selected from silicon carbide, gallium arsenide, gallium nitride, gallium phosphide and the like. The specific choice of semi-insulating material can be flexibly chosen by a person skilled in the art.
The first semi-insulating layer 11b may be provided on the first roller base 11a by coating, spraying, or the like.
In the energized state, since the first roller substrates 11a are electrically connected in series, the current levels of the first roller substrates 11a are substantially equal, and the first semi-insulating layer 11b has lower conductivity than the first roller substrates 11a, the current levels in the first roller substrates 11a are higher than the current levels of the first semi-insulating layer 11b. In this way, the first semi-insulating layer 11b can make the roll surface current of the first roll portion 11 where the first roll base 11a is located different from the roll surface current of the other first roll portions 11.
At this time, by providing the first semi-insulating layer 11b on the first roller base 11a of the first roller portion 11, the roller surface current of the first roller portion 11 can be made different from the roller surface currents of the other first roller portions 11, and the structure is simple and easy to realize.
Since the material of the first semi-insulating layer 11b is generally high in price, the thickness of the first semi-insulating layer 11b is generally small, and may be selected to be 0-3um (e.g. 0.5um, 1um, 1.5um, 2um, 2.5um, 3 um), which is specifically set according to practical needs.
Fig. 4 is a schematic cross-sectional view of an electrolytic roll 10 of one or more embodiments.
In some embodiments, referring to fig. 4, in two adjacent first roller portions 11, the outer peripheral surface of the first roller base 11a of each first roller portion 11 is provided with a first semi-insulating layer 11b having an unequal thickness.
In some examples, the outer peripheral surface of the first roller base 11a of each first roller portion 11 is covered with the first semi-insulating layer 11b. Further, the materials of the first semi-insulating layers 11b are the same, so that the magnitude of the current of the roll surface M formed by the first semi-insulating layers 11b can be controlled conveniently.
The thickness of the first semi-insulating layer 11b refers to the dimension of the first semi-insulating layer 11b in the radial direction of the electrolytic roll 10. Typically, the thickness of the first semi-insulating layer 11b is uniform throughout.
Since the first roller substrates 11a are conductors and the first roller substrates 11a are electrically connected in series, the magnitude of the current on the outer peripheral surface of each first roller substrate 11a is substantially equal. If the first semi-insulating layers 11b having the same thickness are coated on the first roller base 11a, the roller surface currents formed by the first semi-insulating layers 11b are substantially the same.
At this time, when the adjacent two first roller portions 11 each include the first semi-insulating layer 11b, the thickness of each first semi-insulating layer 11b is made different, and the roller surface currents of each first roller portion 11 can be made different.
In some embodiments, referring to fig. 3, at least an outer peripheral surface of the first roller base 11a of the first roller portion 11 is used as the roller surface M of the first roller portion 11.
That is, the first semi-insulating layer 11b is not provided on the outer peripheral surface of the first roller body 11a of the first roller portion 11, and the outer peripheral surface of the first roller body 11a is directly used as the deposition surface (i.e., the roller surface M).
In this way, the consumable material of the first semi-insulating layer 11b can be reduced, and the manufacturing cost of the electrolytic roll 10 can be reduced.
In some embodiments, referring to fig. 3 and 4, the first roller base 11a of all the first roller portions 11 is integrally formed.
As an example, the electrolytic roll 10 may be produced by roughly forming a plurality of grooves provided around the axial direction F of the felt roll (corresponding to the axial direction F of the electrolytic roll 10) on the felt roll to obtain a base material (the base material is all the first roll base 11a integrally formed); and then semi-insulating material is coated, filled and sprayed in each groove to obtain the electrolytic roll 10.
At this time, the first roller substrates 11a are integrally formed, so that the processing process of the electrolytic roller 10 can be simplified, and the electric serial arrangement of the first roller substrates 11a is realized without the assistance of other means, so that the structure of the electrolytic roller 10 is simpler.
Of course, in other embodiments, the respective first roller bases 11a may be connected to each other by means such as being mounted on the roller shafts 10B.
Fig. 5 is a schematic cross-sectional view of an electrolytic roll 10 of one or more embodiments.
In some embodiments, referring to fig. 5, all the roller portions 10A include a plurality of second roller portions 12 sequentially arranged along the axial direction F, each of the second roller portions 12 includes a second roller base 12a, and the second roller base 12a of each of the second roller portions 12 are electrically connected in parallel; of any two adjacent second roller portions 12, one of the second roller portions 12 further includes an isolation layer 12b, the isolation layer 12b includes an insulating inner layer b1 and a semi-insulating outer layer b2, the semi-insulating outer layer b2 is disposed on the outer peripheral surface of the insulating inner layer b1, and both are connected between the second roller bases 12a of the two adjacent second roller portions 12.
The second roller base 12a is substantially roller-shaped, and is cylindrical and columnar around the axial direction F of the electrolytic roller 10. The respective second roller bases 12a should be rotated synchronously.
The second roller substrates 12a are electrically connected in parallel, that is, a plurality of paths of electric currents flow through the respective second roller substrates 12a in the energized state of the electrolytic roller 10. As an example, referring to fig. 5, the current roller further includes a roller shaft 10B, and all the second roller substrates 12a are sequentially sleeved on the roller shaft 10B. The roll shaft 10B is a hollow shaft, in which a plurality of electric connectors 15 are disposed, and each second roll base 12a is correspondingly connected with one electric connector 15. In practice, a plurality of wires connected in parallel may be inserted into the roller shaft 10B and connected to the respective power receiving members 15, so as to realize the electrically parallel arrangement of the respective second roller substrates 12a. Of course, the manner of achieving the arrangement of the respective second roller bases 12a in electrical parallel connection is not limited to the above-described one, and a person skilled in the art can make a conventional design.
Between two adjacent second roller portions 12, one of the second roller portions 12 includes a separator 12b. The isolation layer 12b includes an insulating inner layer b1 and a semi-insulating outer layer b2. The insulating inner layer b1 is a layered structure formed of an insulating material including, but not limited to, ceramics, plastics, insulating glue, and the like. The semi-insulating inner layer b1 is a ring-shaped structure formed of a semi-insulating material, and is provided on the outer peripheral surface of the insulating inner layer b 1. The choice of semi-insulating material may be described with reference to the above. The insulating inner layer b1 and the semi-insulating outer layer b2 may be provided on the second roller base 12a where they are provided by coating, spraying, or the like.
Between two adjacent second roller portions 12, an insulating inner layer b1 is disposed between the two second roller bases 12a in an electrically isolated manner, and the junctions between the second roller bases 12a are electrically connected by a semi-insulating outer layer b2, the outer peripheral surface of the semi-insulating outer layer b2 constitutes a partial roller surface M of the second roller portion 12 where a deposition layer of a certain thickness can be deposited on, and the deposition layers deposited on the two second roller bases 12a can be continuously connected by the deposition layer. It will be appreciated that the radial dimension of the insulating inner layer b1 is greater than the radial dimension of the semi-insulating outer layer b2, i.e. the thickness of the semi-insulating outer layer b2 is smaller.
Normally, the second roller substrates 12a of the second roller sections 12 arranged alternately are equal in current which is fed in, and the second roller substrates 12a are equal in axial width. The second roller substrates 12a of the adjacent two second roller sections 12 are different in current. Further, the second roller base 12a having a larger axial length F receives a smaller current to form a coating region J1 having a larger width and a smaller thickness of the current collector J.
At this time, the second roller substrates 12a of the second roller portion 12 are arranged in parallel, and the electrical isolation between the respective second roller substrates 12a is achieved by the insulating inner layer b1 of the isolation layer 12b, and the continuity of the deposition layer on the respective second roller substrates 12a is achieved by the semi-insulating outer layer b2, so that the current collectors J having unequal thicknesses can be continuously prepared.
Fig. 6 is a schematic cross-sectional view of an electrolytic roll 10 in one or more embodiments.
In some embodiments, referring to fig. 6, all the roller portions 10A include a third roller portion 13 and a fourth roller portion 14 disposed at the intersection along the axial direction F, and the third roller portion 13 and the fourth roller portion 14 are disposed in electrical parallel, wherein the third roller portion 13 is a semi-insulating material.
The third roller portion 13 and the fourth roller portion 14 are electrically connected in parallel, which means that the third roller portion 13 and the fourth roller portion 14 are connected to one-way point current, respectively. As shown in fig. 6, the current roller further includes a roller shaft 10B, and a third roller portion 13 and a fourth roller portion 14 are sequentially fitted over the roller shaft 10B. The roll shaft 10B is a hollow shaft, in which a plurality of electric connectors 15 are disposed, and each third roll portion 13 and each fourth roll portion 14 are correspondingly connected with one electric connector 15. In actual operation, a plurality of wires connected in parallel may be inserted into the roller shaft 10B and connected to the respective power receiving members 15, so as to realize the electrical parallel arrangement of the respective third roller portion 13 and fourth roller portion 14. Of course, the manner of achieving the arrangement of the respective third roller portions 13 and fourth roller portions 14 in electrical parallel is not limited to the above-described one, and a person skilled in the art can make a conventional design.
The third roller portion 13 is a piece of semi-insulating material, with reference to the above description regarding the choice of semi-insulating material. Typically, the material used for each third roller portion 13 is the same. The fourth roller portion 14 is a conductor, and may be a metal member, specifically, pure copper, copper alloy, or the like, and is specifically selected as needed.
When the third roller portion 13 and the fourth roller portion 14 are electrically connected in parallel, the roller surface current of the third roller portion 13 is generally smaller than the roller surface current of the fourth roller portion 14, and in actual application, the currents connected to the third roller portion 13 and the fourth roller portion 14 may be the same or different. The current drawn between all third roller sections 13 is typically equal and the current drawn between all fourth roller sections 14 is typically equal. Typically, the axial width of the third roller portion 13 is greater than the axial width of the fourth roller portion 14.
At this time, the coating region J1 having a small thickness may be deposited on the roll surface M of the third roll portion 13, and the blank region J2 having a large thickness may be deposited on the roll surface M of the fourth roll portion 14, thereby obtaining the current collector J having a different thickness.
In an embodiment, referring to fig. 3, all the roller portions 10A are first roller portions 11, and the outer peripheral surface of the first roller base 11a of one of the two adjacent first roller portions 11 is directly used as the roller surface M, the outer peripheral surface of the first roller base 11a of the other first roller portion 11 is covered with the first semi-insulating layer 11b, and the thicknesses of all the first semi-insulating layers 11b in the first roller portions 11 covered with the first semi-insulating layer 11b are the same. Further, the axial direction F length of the first roller base 11a whose outer peripheral surface is directly the roller surface M is smaller than the axial direction F length of the first roller base 11a covered with the first semi-insulating layer 11b.
In another embodiment, referring to fig. 4, all the roller portions 10A are first roller portions 11, the first roller base 11a of each first roller portion 11 is covered with a first semi-insulating layer 11b, the first semi-insulating layer 11b of one of the two adjacent first roller portions 11 is different from the first semi-insulating layer 11b of the other first roller portion 11 in thickness, and the thicknesses of the first semi-insulating layers 11b of the two first roller portions 11 arranged alternately are the same. Further, the axial F length of the first roller base 11a where the first semi-insulating layer 11b having a larger thickness is located is longer than the axial F length of the first roller base 11a where the first semi-insulating layer 11b having a smaller thickness is located.
In addition, the embodiment of the application also provides an electrolysis device, which comprises the electrolysis roller 10 and has all the beneficial effects. In addition, the electrolysis device may further include other structures such as anode plates, which are not described herein with reference to the above description.
In addition, the embodiment of the application also provides a battery production system, which comprises the electrolysis device, wherein the electrolysis device is used for preparing the current collector J. In particular, the electrolytic device may be used, but is not limited to, for producing copper foil.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.
Claims (11)
1. An electrolytic roller (10), characterized in that the electrolytic roller (10) comprises a plurality of roller parts (10A) which are sequentially connected along the axial direction (F) thereof, the roller parts (10A) are sequentially connected along the axial direction (F) of the electrolytic roller (10), and the roller surfaces (M) of all the roller parts (10A) are continuously arranged;
wherein the electrolytic roller (10) is configured such that, in an energized state, the roller surface currents between two adjacent roller portions (10A) are not equal, and the roller surface currents between two arbitrarily-spaced roller portions (10A) are configured to be equal.
2. The electrolytic roll (10) according to claim 1, wherein the axial widths of the respective roll portions (10A) having equal roll surface currents are equal, and the axial width of the roll portion (10A) having a larger roll surface current among the adjacent two roll portions (10A) is smaller than the axial width of the roll portion (10A) having a smaller roll surface current.
3. The electrolytic roll (10) according to claim 1 or 2, characterized in that all the roll portions (10A) comprise a plurality of first roll portions (11) disposed adjacent to one another in sequence, each of the first roll portions (11) comprising a first roll base body (11 a), the first roll base bodies (11 a) of all the first roll portions (11) being disposed electrically in series along the axial direction (F).
4. An electrolytic roll (10) according to claim 3, characterized in that at least one of the first roll portions (11) further comprises a first semi-insulating layer (11 b) covering the outer circumferential surface of the first roll base body (11 a), the outer surface of the first semi-insulating layer (11 b) facing away from the first roll base body (11 a) being the roll surface (M) of the first roll portion (11).
5. The electrolytic roll (10) according to claim 4, wherein the outer peripheral surface of the first roll base body (11 a) of each of the adjacent two first roll portions (11) is covered with the first semi-insulating layer (11 b) having an unequal thickness, respectively.
6. An electrolytic roll (10) according to claim 3, characterized in that an outer peripheral surface of the first roll base body (11 a) of at least one of the first roll portions (11) is present as a roll surface (M) of the first roll portion (11).
7. An electrolytic roll (10) according to claim 3, characterized in that the first roll base body (11 a) of all the first roll portions (11) is integrally formed.
8. The electrolytic roll (10) according to claim 1 or 2, wherein all the roll portions (10A) include a plurality of second roll portions (12) disposed in sequence along the axial direction (F), each of the second roll portions (12) including a second roll base body (12 a), the second roll base bodies (12 a) of the respective second roll portions (12) being disposed in electrical parallel therebetween;
in any adjacent two second roller parts (12), one of the second roller parts (12) further comprises an isolation layer (12 b), the isolation layer (12 b) comprises an insulating inner layer (b 1) and a semi-insulating outer layer (b 2), the semi-insulating outer layer (b 2) is covered on the outer peripheral surface of the insulating inner layer (b 1), and the two are connected between the second roller matrixes (12 a) of the adjacent two second roller parts (12).
9. Electrolytic roll (10) according to claim 1 or 2, characterized in that all the roll sections (10A) comprise third roll sections (13) and fourth roll sections (14) alternately arranged in the axial direction (F), the third roll sections (13) and the fourth roll sections (14) being arranged electrically in parallel;
wherein the third roller part (13) is made of semi-insulating material.
10. An electrolysis device, characterized in that it comprises an electrolysis roller (10) according to any one of claims 1 to 9.
11. A battery production system, characterized by comprising an electrolysis device according to claim 10 for preparing a current collector (J).
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| CN202311415221.0A CN117144430B (en) | 2023-10-30 | 2023-10-30 | Electrolytic roll, electrolytic device and battery production system |
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| CN202311415221.0A CN117144430B (en) | 2023-10-30 | 2023-10-30 | Electrolytic roll, electrolytic device and battery production system |
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| CN117144430B true CN117144430B (en) | 2024-03-22 |
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| CN117144430A (en) | 2023-12-01 |
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