Manufacturing equipment, manufacturing method and application of single-sided electrochemical current collector
By designing equipment and methods for manufacturing single-sided electrochemical current collectors, the problems of resource waste and high costs were solved, and efficient production of two rolls of single-sided etched electrochemical current collectors was achieved to meet the needs of supercapacitors.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-31
- Publication Date
- 2026-03-24
AI Technical Summary
In existing technologies, the electrode foil used in single-sided coated supercapacitors is usually double-sided electrochemically etched current collector, which leads to resource waste and high production efficiency and cost.
Design a device for manufacturing single-sided electrochemical current collectors. Aluminum foil is unwound by first and second unwinding devices and tightly bonded under the guidance of guide rollers. It then enters the pressing roller group for single-sided perforation, followed by etching in an electrochemical tank. Finally, it is cleaned with pure water, coated, and dried to produce two rolls of single-sided etched electrochemical current collectors.
It achieves double the production of products at the same production speed and energy consumption, reducing production costs while meeting product performance requirements.
Smart Images
Figure CN121726243A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of single-sided electrochemical current collector manufacturing, in particular to a single-sided electrochemical current collector manufacturing device, method and application. BACKGROUND
[0002] Super capacitors have a wide range of applications as a new type of energy storage device. The electrode foil for super capacitors usually needs to go through the process steps of oil stain cleaning, electrochemical etching, pure water cleaning, film plating, and drying. The electrode foil for super capacitors usually has single-sided coating and double-sided coating, and the electrode foil for single-sided coating super capacitors on the market is usually double-sided electrochemical etching current collector, which causes resource waste. SUMMARY
[0003] The present application aims to overcome the shortcomings of the prior art, and provide a single-sided electrochemical current collector manufacturing device, method and application, which can produce two rolls of single-sided etching electrochemical current collectors simultaneously, improve production efficiency, and reduce production cost.
[0004] The present application is implemented by the following technical scheme: a single-sided electrochemical current collector manufacturing device, comprising a rack, a first unwinding device, a first winding device, a second unwinding device, a second winding device, a pre-treatment tank, an electrochemical tank, and a post-treatment device. A plurality of first guide roller groups are arranged on the outer side of the rack. A plurality of second guide roller groups are arranged on the inner side of the rack. The first unwinding device and the second unwinding device are located on the left side outside the rack. The first winding device and the second winding device are located on the right side outside the rack. The pre-treatment tank and the electrochemical tank are located inside the rack. The post-treatment device is arranged on the rack and located downstream of the electrochemical tank. A first conveying roller group and a second conveying roller group are arranged in the pre-treatment tank, and the second conveying roller group is located below the first conveying roller group. A pressing roller group is arranged in the electrochemical tank. The post-treatment device has a first treatment channel and a second treatment channel. The first unwinding device is used to unwind a first aluminum foil. The second unwinding device is used to unwind a second aluminum foil. The first aluminum foil passes through the first guide roller groups, the first conveying roller group, the pressing roller group, and the first treatment channel in sequence under the guidance of the first guide roller groups, and is finally wound on the first winding device. The second aluminum foil passes through the second guide roller groups, the second conveying roller group, the pressing roller group, and the second treatment channel in sequence under the guidance of the second guide roller groups, and is finally wound on the second winding device. When the first aluminum foil and the second aluminum foil pass through the pressing roller group, the opposite faces of the first aluminum foil and the second aluminum foil are tightly attached.
[0005] Further, the pressing roller group is provided with two groups, and the two groups of pressing roller groups are arranged side by side and spaced apart. Each group of pressing roller groups is arranged in the electrochemical tank through a guide roller frame.
[0006] Further, each of the pressing roller groups comprises an upper guide roller group, a middle guide roller group, and a lower guide roller group, and the middle guide roller group is provided with two or more groups.
[0007] Further, the upper guide roller group, the middle guide roller group, and the lower guide roller group have the same structure and each comprises a left rotating roller and a right rotating roller, the surfaces of the left rotating roller and the right rotating roller are tangent to each other, a left bearing seat and a right bearing seat are arranged on the guide roller frame, a left long circular groove is arranged in the left bearing seat, a right long circular groove is arranged in the right bearing seat, and the left long circular groove and the right long circular groove are inclined downward in a direction of approaching each other, end shafts at both ends of the left rotating roller are rotatably installed in the left long circular groove, and end shafts at both ends of the right rotating roller are rotatably installed in the right long circular groove.
[0008] Further, two guide rollers are arranged below the two pressing roller groups and are spaced apart and parallel.
[0009] Further, the first guide roller group comprises, in sequence according to the conveying direction of the first aluminum foil, a first output roller, a first transition roller, a first lead-in roller, a first lead-out roller, a first lead-in roller, a first lead-out roller, a second transition roller, and a first winding roller, the first lead-in roller and the first lead-out roller correspond to the first conveying roller group, the first lead-in roller and the first lead-out roller correspond to the pressing roller group, and the first lead-out roller and the second transition roller are located on both sides of the first processing channel.
[0010] Further, the second guide roller group comprises, in sequence according to the conveying direction of the second aluminum foil, a second output roller, a third transition roller, a second lead-in roller, a second lead-out roller, a second lead-in roller, a second lead-out roller, a fourth transition roller, and a second winding roller, the second lead-in roller and the second lead-out roller correspond to the second conveying roller group, the second lead-in roller and the second lead-out roller correspond to the pressing roller group, and the second lead-out roller and the fourth transition roller are located on both sides of the second processing channel.
[0011] Further, the first conveying roller group is composed of three rotating rollers arranged in a triangular shape, and the second conveying roller group is composed of two rotating rollers arranged in parallel with a spacing.
[0012] A manufacturing method of a single-sided electrochemical current collector, which is manufactured by using the manufacturing equipment of the single-sided electrochemical current collector as described above, and comprises the following steps: S1. The first unwinding device unwinds the first aluminum foil, and the second unwinding device unwinds the second aluminum foil; S2. The first aluminum foil is sequentially guided into the front processing tank through the first output roller, the first transition roller, the first introduction roller and the first conveying roller group, and the second aluminum foil is sequentially guided into the front processing tank through the second output roller, the third transition roller, the second introduction roller and the second conveying roller group. The first aluminum foil and the second aluminum foil are cleaned of impurities such as oil in the front processing tank. After cleaning, the first aluminum foil is guided out of the front processing tank through the first guide-out roller, and the second aluminum foil is guided out of the front processing tank through the second guide-out roller. S3. The first aluminum foil is guided into one of the pressing roller groups through the first introduction roller, and then is guided into the other pressing roller group through the guide roller. Meanwhile, the second aluminum foil is guided into one of the pressing roller groups through the second introduction roller, and then is guided into the other pressing roller group through the guide roller. Under the action of the pressing roller groups and the guide roller, the opposite faces of the first aluminum foil and the second aluminum foil are tightly attached, and the first aluminum foil and the second aluminum foil are arranged with holes in the electrochemical tank to obtain the first electrochemical current collector foil and the second electrochemical current collector foil with single-sided etching. S4. After the first electrochemical current collector foil is guided out of the electrochemical tank through the first guide-out roller, the first electrochemical current collector foil is cleaned with pure water, coated with a film, and then is guided into the first processing channel for drying. Meanwhile, after the second electrochemical current collector foil is guided out of the electrochemical tank through the second guide-out roller, the second electrochemical current collector foil is cleaned with pure water, coated with a film, and then is guided into the second processing channel for drying. S5. The first electrochemical current collector foil is guided into the first winding device for winding through the second transition roller. The second electrochemical current collector foil is guided into the second winding device for winding through the fourth transition roller.
[0013] The current collector prepared by the method for manufacturing single-sided electrochemical current collector has the advantages that: Compared with the prior art, the method has the following advantages: The first aluminum foil is wound by the first winding device, the second aluminum foil is wound by the second winding device, the first aluminum foil is guided into the first conveying roller group and the pressing roller group under the guidance of the first guide roller group, the second aluminum foil is guided into the second conveying roller group and the pressing roller group under the guidance of the second guide roller group, the first aluminum foil and the second aluminum foil are tightly attached to each other under the action of the pressing roller group, the first aluminum foil and the second aluminum foil are separated under the guidance of the first guide roller group and the second guide roller group after being arranged with holes in the electrochemical tank, and the first aluminum foil and the second aluminum foil are wound in the first winding device and the second winding device respectively. Therefore, one device can produce two single-sided etching electrochemical current collectors, the production is doubled under the same production speed and energy consumption, the product performance is met, and the production cost is reduced. BRIEF DESCRIPTION OF DRAWINGS
[0014] Fig. 1 FIG. 1 is a structural schematic diagram of a device for manufacturing single-sided electrochemical current collector according to the present application; Fig. 2 Structure diagram of the pressing roller group of the manufacturing equipment of the single-sided electrochemical current collector of the present application; Fig. 3 Structure diagram of the upper guide roller group of the manufacturing equipment of the single-sided electrochemical current collector of the present application.
[0015] Legend: 1-frame, 2-first unwinding device, 3-first winding device, 4-second unwinding device, 5-second winding device, 6-pre-treatment tank, 7-electrochemical tank, 8-post-treatment device, 9-first guide roller group, 10-second guide roller group, 11-first conveying roller group, 12-second conveying roller group, 13-pressing roller group, 14-first processing channel, 15-second processing channel, 16-guide roller frame, 17-guide roller, 18-upper guide roller group, 19-intermediate guide roller group, 20-lower guide roller group, 21-left rotating roller, 22-right rotating roller, 23-left long circular groove, 24-right long circular groove, 25-first output roller, 26-first transition roller, 27-first leading-in roller, 28-first leading-out roller, 29-first leading-in roller, 30-first leading-out roller, 31-second transition roller, 32-first winding roller, 33-second output roller, 34-third transition roller, 35-second leading-in roller, 36-second leading-out roller, 37-second leading-in roller, 38-second leading-out roller, 39-fourth transition roller, 40-second winding roller, 41-first aluminum foil, 42-second aluminum foil. DETAILED DESCRIPTION
[0016] REFERENCE Figs. 1 to 3The application discloses a manufacturing device for single-sided electrochemical current collector, which comprises a frame 1, a first unwinding device 2, a first winding device 3, a second unwinding device 4, a second winding device 5, a pretreatment tank 6, an electrochemical tank 7, a post-treatment device 8, a plurality of first guide roller groups 9 are arranged on the outer side of the frame 1 at intervals, a plurality of second guide roller groups 10 are arranged on the inner side of the frame 1 at intervals, the first unwinding device 2 and the second unwinding device 4 are located on the left side outside the frame, the first winding device 3 and the second winding device 5 are located on the right side outside the frame 1, the pretreatment tank 6 and the electrochemical tank 7 are located in the frame 1, the post-treatment device 8 is arranged on the frame 1 and located downstream of the electrochemical tank 7, the first conveying roller group 11 and the second conveying roller group 12 are arranged in the pretreatment tank 6, and the second conveying roller group 12 is located below the first conveying roller group 11, the pressing roller group 13 is arranged in the electrochemical tank 7, the post-treatment device 8 has the first treatment channel 14 and the second treatment channel 15, the first unwinding device 2 is used for unwinding the first aluminum foil 41, the second unwinding device 4 is used for unwinding the second aluminum foil 42, the first aluminum foil 41 passes through the first conveying roller group 11, the pressing roller group 13 and the first treatment channel 14 under the guidance of the first guide roller group 9 in sequence and is finally wound on the first winding device 3, the second aluminum foil 42 passes through the second conveying roller group 12, the pressing roller group 13 and the second treatment channel 15 under the guidance of the second guide roller group 10 in sequence and is finally wound on the second winding device 5, and the first aluminum foil 41 and the second aluminum foil 42 are tightly attached to each other when passing through the pressing roller group 13.
[0017] The pressing roller group 13 is provided with two groups, and the two groups of pressing roller groups 13 are arranged side by side at intervals.
[0018] Two guide rollers 17 are arranged below the two pressing roller groups 13 and are arranged in parallel at intervals.
[0019] Each group of pressing roller groups 13 comprises an upper guide roller group 18, an intermediate guide roller group 19 and a lower guide roller group 20, and the intermediate guide roller group 19 is provided with two groups or more groups.
[0020] The upper guide roller group 18, the two or more groups of intermediate guide roller groups 19 and the lower guide roller group 20 are arranged, and the first aluminum foil 41 and the second aluminum foil 42 are pressed by the multiple groups of guide rollers, so that the attachment efficiency of the first aluminum foil 41 and the second aluminum foil 42 is improved.
[0021] The upper guide roller group 18, the middle guide roller group 19 and the lower guide roller group 20 have the same structure, including a left rotating roller 21 and a right rotating roller 22 respectively. The surfaces of the left rotating roller 21 and the right rotating roller 22 are tangent. A left bearing seat and a right bearing seat are provided on the guide roller frame 16. A left elongated oval groove 23 is provided in the left bearing seat and a right elongated oval groove 24 is provided in the right bearing seat. The left elongated oval groove 23 and the right elongated oval groove 24 tend to be inclined downward in the direction of approaching each other. The end shafts at both ends of the left rotating roller 21 are rotatably installed in the left elongated oval groove 23, and the end shafts at both ends of the right rotating roller 22 are rotatably installed in the right elongated oval groove 24.
[0022] By tilting the left elongated groove 23 and the right elongated groove 24 downwards towards each other, the end shaft of the left rotating roller 21 is installed in the left elongated groove 23, and the end shaft of the right rotating roller 22 is installed in the right elongated groove 24. When the left rotating roller 21 and the right rotating roller 22 rotate, they fall under the rotational driving force and their own gravity, increasing the pre-tightening pressure of the left rotating roller 21 and the right rotating roller 22. This causes the first aluminum foil 41 and the second aluminum foil 42 to be tightly bonded together under the mutual clamping of the left rotating roller 21 and the right rotating roller 22, so that the bonding surface of the first aluminum foil 41 and the second aluminum foil 42 is not perforated, thereby achieving single-sided etching of the first aluminum foil 41 and the second aluminum foil 42.
[0023] The first guide roller group 9 includes a first output roller 25, a first transition roller 26, a first inlet roller 27, a first outlet roller 28, a first inlet roller 29, a first lead-out roller 30, a second transition roller 31, and a first take-up roller 32, which are distributed sequentially in the conveying direction of the first aluminum foil 41. The first inlet roller 27 and the first outlet roller 28 correspond to the first conveying roller group 11, and the first inlet roller 29 and the first lead-out roller 30 correspond to the pressing roller group 13. The first lead-out roller 30 and the second transition roller 31 are located on both sides of the first processing channel 14.
[0024] The second guide roller group 10 includes a second output roller 33, a third transition roller 34, a second inlet roller 35, a second outlet roller 36, a second inlet roller 37, a second outlet roller 38, a fourth transition roller 39, and a second take-up roller 40, which are distributed sequentially in the conveying direction of the second aluminum foil 42. The second inlet roller 35 and the second outlet roller 36 correspond to the second conveying roller group 12, and the second inlet roller 37 and the second outlet roller 38 correspond to the pressing roller group 13. The second outlet roller 38 and the fourth transition roller 39 are located on both sides of the second processing channel 15.
[0025] The first conveyor roller group 11 consists of three rotating rollers arranged in a triangle, and the second conveyor roller group 12 consists of two rotating rollers arranged in parallel at intervals.
[0026] A method for fabricating a single-sided electrochemical current collector, using the aforementioned equipment, includes the following steps: S1. At the same time as the first unwinding device unwinds the first aluminum foil, the second unwinding device unwinds the second aluminum foil.
[0027] S2. The first aluminum foil enters the pretreatment tank sequentially through the first output roller, the first transition roller, the first inlet roller, and the first conveying roller group. At the same time, the second aluminum foil enters the pretreatment tank sequentially through the second output roller, the third transition roller, the second inlet roller, and the second conveying roller group. The first and second aluminum foils are cleaned of oil stains and other impurities in the pretreatment tank. After cleaning, the first aluminum foil is discharged from the pretreatment tank through the first outlet roller, and the second aluminum foil is discharged from the pretreatment tank through the second outlet roller.
[0028] S3. The first aluminum foil enters one set of pressing rollers via the first introducing roller, and then enters another set of pressing rollers around the guide roller. At the same time, the second aluminum foil enters one set of pressing rollers via the second introducing roller, and then enters another set of pressing rollers around the guide roller. Under the action of the pressing rollers and the guide roller, the opposite surfaces of the first and second aluminum foils are tightly bonded together, and holes are formed in the electrochemical tank to obtain a first electrochemical current collector foil and a second electrochemical current collector foil with single-sided etching.
[0029] S4. After the first electrochemical current collector foil is exited from the electrochemical tank via the first lead-out roller, it is washed with pure water, coated, and then enters the first processing channel for drying. Simultaneously, the second electrochemical current collector foil is exited from the electrochemical tank via the second lead-out roller, washed with pure water, coated, and then enters the second processing channel for drying. S5. The first electrochemical current collector foil enters the first winding device via the second transition roller for winding, and the second electrochemical current collector foil enters the second winding device via the fourth transition roller for winding.
[0030] Specifically, the pure water cleaning and coating device has the same structure as the pretreatment tank, and its location is between the electrochemical tank and the post-treatment device. In this embodiment, the structure of the pure water cleaning and coating device will not be described in detail.
[0031] The current collector prepared using the above-described method for fabricating a single-sided electrochemical current collector is applied to a single-sided coated supercapacitor.
[0032] The above detailed description is a specific description of feasible embodiments of the present invention. These embodiments are not intended to limit the patent scope of the present invention. All equivalent implementations or modifications that do not depart from the present invention should be included in the patent scope of this case.
Claims
1. A device for fabricating a single-sided electrochemical current collector, characterized in that: The assembly includes a frame, a first unwinding device, a first winding device, a second unwinding device, a second winding device, a pretreatment tank, an electrochemical tank, and a post-treatment device. Multiple spaced-apart first guide roller groups are arranged on the outer side of the frame, and multiple spaced-apart second guide roller groups are arranged on the inner side of the frame. The first and second unwinding devices are located on the left side outside the frame, and the first and second winding devices are located on the right side outside the frame. The pretreatment tank and the electrochemical tank are located inside the frame. The post-treatment device is mounted on the frame and located downstream of the electrochemical tank. A first conveyor roller group and a second conveyor roller group are arranged within the pretreatment tank, and the second conveyor roller group is located downstream of the first conveyor roller group. Below the feeding roller group, a pressing roller group is provided in the electrochemical tank. The post-processing device has a first processing channel and a second processing channel. The first unwinding device is used to unwind the first aluminum foil, and the second unwinding device is used to unwind the second aluminum foil. Under the guidance of the first guide roller group, the first aluminum foil passes through the first conveying roller group, the pressing roller group, and the first processing channel in sequence, and is finally wound up in the first winding device. Under the guidance of the second guide roller group, the second aluminum foil passes through the second conveying roller group, the pressing roller group, and the second processing channel in sequence, and is finally wound up in the second winding device. When the first aluminum foil and the second aluminum foil pass through the pressing roller group, the opposing surfaces of the first aluminum foil and the second aluminum foil are tightly bonded together.
2. The fabrication equipment for a single-sided electrochemical current collector according to claim 1, characterized in that: There are two sets of pressing rollers, which are arranged side by side with intervals. Each set of pressing rollers is set in the electrochemical tank through a guide roller frame.
3. The apparatus for fabricating a single-sided electrochemical current collector according to claim 2, characterized in that: Each set of pressing rollers includes an upper guide roller set, an intermediate guide roller set, and a lower guide roller set, and the intermediate guide roller set is provided in two or more sets.
4. The apparatus for fabricating a single-sided electrochemical current collector according to claim 3, characterized in that: The upper guide roller group, the middle guide roller group, and the lower guide roller group have the same structure, each including a left rotating roller and a right rotating roller. The surfaces of the left rotating roller and the right rotating roller are tangent. The guide roller frame is provided with a left bearing seat and a right bearing seat. The left bearing seat has a left elongated oval groove, and the right bearing seat has a right elongated oval groove. The left elongated oval groove and the right elongated oval groove are inclined downwards in a direction that tends to approach each other. The end shafts at both ends of the left rotating roller are rotatably installed in the left elongated oval groove, and the end shafts at both ends of the right rotating roller are rotatably installed in the right elongated oval groove.
5. The apparatus for fabricating a single-sided electrochemical current collector according to claim 3, characterized in that: Below the two sets of pressing rollers, there are two parallel guide rollers spaced apart.
6. The apparatus for fabricating a single-sided electrochemical current collector according to claim 5, characterized in that: The first guide roller group includes a first output roller, a first transition roller, a first inlet roller, a first outlet roller, a first introductory roller, a first outgoing roller, a first introductory roller, a first outgoing roller, a second transition roller, and a first take-up roller, which are distributed sequentially in the conveying direction of the first aluminum foil. The first introductory roller and the first outgoing roller correspond to the first conveying roller group, and the first introductory roller and the first outgoing roller correspond to the pressing roller group. The first outgoing roller and the second transition roller are located on both sides of the first processing channel.
7. The apparatus for fabricating a single-sided electrochemical current collector according to claim 6, characterized in that: The second guide roller group includes a second output roller, a third transition roller, a second inlet roller, a second outlet roller, a second introductory roller, a second lead-in roller, a second lead-out roller, a fourth transition roller, and a second take-up roller, which are distributed sequentially in the conveying direction of the second aluminum foil. The second introductory roller and the second outlet roller correspond to the second conveying roller group, and the second introductory roller and the second lead-out roller correspond to the pressing roller group. The second lead-out roller and the fourth transition roller are located on both sides of the second processing channel.
8. The apparatus for fabricating a single-sided electrochemical current collector according to claim 7, characterized in that: The first conveying roller group consists of three rotating rollers arranged in a triangle, and the second conveying roller group consists of two rotating rollers arranged in parallel at intervals.
9. A method for fabricating a single-sided electrochemical current collector, comprising fabricating the current collector using the fabrication equipment described in any one of claims 1-8, characterized in that, Includes the following steps: S1. At the same time as the first unwinding device unwinds the first aluminum foil, the second unwinding device unwinds the second aluminum foil; S2. The first aluminum foil enters the pretreatment tank sequentially through the first output roller, the first transition roller, the first inlet roller, and the first conveying roller group. At the same time, the second aluminum foil enters the pretreatment tank sequentially through the second output roller, the third transition roller, the second inlet roller, and the second conveying roller group. The first and second aluminum foils are cleaned of oil and other impurities in the pretreatment tank. After cleaning, the first aluminum foil is discharged from the pretreatment tank through the first outlet roller, and the second aluminum foil is discharged from the pretreatment tank through the second outlet roller. S3. The first aluminum foil enters one set of pressing rollers via the first introducing roller, and then enters another set of pressing rollers around the guide roller. At the same time, the second aluminum foil enters one set of pressing rollers via the second introducing roller, and then enters another set of pressing rollers around the guide roller. Under the action of the pressing rollers and the guide roller, the opposite surfaces of the first aluminum foil and the second aluminum foil are tightly bonded together, and holes are formed in the electrochemical tank to obtain a first electrochemical current collector foil and a second electrochemical current collector foil with single-sided etching. S4. After the first electrochemical current collector foil is led out of the electrochemical tank by the first lead-out roller, it is washed with pure water, coated, and then enters the first processing channel for drying. At the same time, after the second electrochemical current collector foil is led out of the electrochemical tank by the second lead-out roller, it is washed with pure water, coated, and then enters the second processing channel for drying. S5. The first electrochemical current collector foil enters the first winding device for winding via the second transition roller, and the second electrochemical current collector foil enters the second winding device for winding via the fourth transition roller.
10. The current collector prepared by the method of claim 9 for single-sided electrochemical current collector is applied to a single-sided coated supercapacitor.