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CN-122013281-A - Copper-feeding-preventing sectional conductive roller for electroplating photovoltaic cell

CN122013281ACN 122013281 ACN122013281 ACN 122013281ACN-122013281-A

Abstract

The invention discloses an anti-copper-feeding sectional type conductive roller for electroplating a photovoltaic cell, which relates to the technical field of electroplating of photovoltaic cells and comprises an insulating roller, wherein a hollow rotating shaft is coaxially fixed inside the insulating roller, a plurality of groups of electric brush groups are annularly arranged inside the insulating roller along the circumferential direction of the insulating roller, each group of electric brush groups consists of a plurality of conductive needles axially arranged along the insulating roller, each conductive needle is radially arranged along the insulating roller, one end of each conductive needle extends to an inner hole of the hollow rotating shaft, the other end of each conductive needle stretches out of the outer surface of the insulating roller in a telescopic manner, conductive plates corresponding to the groups of electric brush groups are arranged in the inner holes of the hollow rotating shaft, and each conductive plate is electrically connected with the conductive needle of the corresponding electric brush group. Above-mentioned a prevent going up copper sectional type conductive roller for photovoltaic cell piece electroplates, through flexible conductive needle physical isolation, self-cleaning and with the accurate cooperation of intermittent type power supply, stopped "on copper" phenomenon from the root, showing the long-term operational reliability and the stability that has promoted equipment.

Inventors

  • YANG YI
  • Weng Guozhou

Assignees

  • 雷泽新能源科技(江苏)有限公司

Dates

Publication Date
20260512
Application Date
20260306

Claims (10)

  1. 1. The copper-loading-preventing segmented conductive roller for electroplating the photovoltaic cell comprises an insulating roller (1) and is characterized in that a hollow rotating shaft (3) is coaxially fixed inside the insulating roller (1), a plurality of groups of brush groups (2) are annularly arranged inside the insulating roller (1) along the circumferential direction of the insulating roller, each group of brush groups (2) is composed of a plurality of conductive pins (201) axially arranged along the insulating roller (1), and each conductive pin (201) is radially arranged along the insulating roller (1); One end of the conductive pin (201) extends to an inner hole (4) of the hollow rotating shaft (3), and the other end of the conductive pin stretches out and draws back the outer surface of the insulating roller (1), conductive plates (5) corresponding to all groups of electric brush groups (2) are arranged in the inner hole (4) of the hollow rotating shaft (3), and all the conductive plates (5) are electrically connected with the conductive pins (201) corresponding to the electric brush groups (2); One end of the hollow rotating shaft (3) is detachably connected with a conductive shaft (6), a plurality of sector electrodes (7) are embedded in the conductive shaft (6) along the radial direction, each sector electrode (7) is connected with a conductive plate (5) of a corresponding electric brush group (2) through an independent wire, and the conductive roller further comprises an intermittent control mechanism (8) for driving the conductive needle (201) to stretch out and draw back along the radial direction.
  2. 2. The copper-feeding-preventing segmented conductive roller for photovoltaic cell electroplating according to claim 1, wherein the outer circumferential surface of the fan-shaped electrode (7) inside the conductive shaft (6) is coplanar with the outer circumferential surface of the conductive shaft (6) and smoothly transits, and the number and the angular arrangement of the fan-shaped electrodes (7) correspond to those of the brush group (2) on the insulating roller (1).
  3. 3. The copper-loading-preventing segmented conductive roller for electroplating of photovoltaic cells according to claim 1, wherein an insulating sleeve (11) is fixedly arranged inside the insulating roller (1) along the radial direction, the insulating sleeve (11) forms a guide channel for sliding insertion of the conductive needle (201), and two ends of the insulating sleeve (11) extend to the inner cavity wall and the outer circumferential surface of the insulating roller (1) respectively.
  4. 4. A copper-loading-preventing segmented conductive roller for electroplating a photovoltaic cell according to claim 3, wherein one end of the conductive needle (201) located in the inner hole (4) of the hollow rotating shaft (3) is provided with a conical end (2011), one end of the conical end (2011) with smaller taper faces the outer side of the insulating roller (1), and one end with larger taper faces the center direction of the hollow rotating shaft (3).
  5. 5. The copper-loading-preventing segmented conductive roller for electroplating of photovoltaic cells according to claim 1, wherein an elastic connecting piece (9) is arranged in an inner hole (4) of the hollow rotating shaft (3), the elastic connecting piece (9) comprises a spring (903) sleeved on a limiting rod (901), the spring (903) acts on the conductive plate (5) and provides an elastic force for enabling the conductive plate (5) to move towards the center direction of the hollow rotating shaft (3).
  6. 6. The copper-loading-preventing segmented conductive roller for electroplating of photovoltaic cells according to claim 5, wherein the limiting rod (901) is arranged on the conductive plate (5) in a penetrating manner, one end of the limiting rod (901) is rigidly connected with the hole wall of the inner hole (4) of the hollow rotating shaft (3), and a nut (902) is arranged at the other end of the limiting rod so as to limit the conductive plate (5) within a range allowing the conductive plate to move along the axial direction of the limiting rod (901).
  7. 7. The copper-loading-preventing segmented conductive roller for electroplating of a photovoltaic cell according to claim 1, wherein the intermittent control mechanism (8) comprises a fixed shaft (801), a rotating frame (802), a cam (803) and a guide column (805), the fixed shaft (801) is arranged at the center of an inner hole (4) of the hollow rotating shaft (3) and coaxially positioned with the inner hole (4) of the hollow rotating shaft (3) through the rotating frame (802), the cam (803) is fixedly sleeved on the fixed shaft (801), and the guide column is fixedly arranged on each conductive plate (5) and is in contact with the outer circumferential surface of the cam (803).
  8. 8. The copper-loading-preventing segmented conductive roller for electroplating of photovoltaic cells according to claim 7, wherein the rotating frame (802) comprises a sleeve (821) and a plurality of fixing rods (822) which are radially and uniformly connected between the outer wall of the sleeve (821) and the inner hole (4) wall of the hollow rotating shaft (3), and the fixing shafts (801) are rotatably supported in the sleeve (821).
  9. 9. The copper-feeding-preventing segmented conductive roller for photovoltaic cell electroplating according to claim 7, wherein a radially-raised protrusion (804) is arranged on the outer circumferential surface of the cam (803), and the protrusion (804) comprises an arc surface concentric with the base circle of the cam (803).
  10. 10. The copper-feeding preventing segmented conductive roller for photovoltaic cell electroplating according to claim 7, wherein the end of the guide post (805) is processed into an arc surface, and the arc surface is kept in contact with the outer circumferential surface of the cam (803).

Description

Copper-feeding-preventing sectional conductive roller for electroplating photovoltaic cell Technical Field The invention relates to the technical field of photovoltaic cell electroplating, in particular to a copper-feeding-preventing sectional type conductive roller for photovoltaic cell electroplating. Background In the continuous electroplating process of the photovoltaic cell, the conductive roller is a core transmission and conductive component, the cell is continuously conveyed through the plating tank, the conductive roller is in contact with the cell through rotation and provides stable cathode current for the cell at a contact point, and therefore efficient deposition of metal is achieved. The rotary contact type electroplating method lays a technical foundation for realizing high-speed and continuous industrial production. However, this integrally conductive rotary design also has an inherent disadvantage in the prior art in that the portion of the conductive roller immersed in the plating solution, although not in contact with the battery, is in an energized state due to the overall conduction, and a parasitic potential is formed in the solution, resulting in unintended deposition of copper ions on its surface, i.e., a "copper-on" phenomenon. The method not only causes unnecessary loss of noble metal, but also causes continuous increase of roller diameter and surface roughening, thereby interfering stable transmission and coating uniformity of the battery piece, finally forcing frequent shutdown and maintenance of the production line, and severely restricting production efficiency and cost control. Therefore, there are still drawbacks and shortcomings in the prior art, and how to provide a copper-feeding-preventing conductive roller is a technical problem to be solved by those skilled in the art. Disclosure of Invention The invention aims to provide an anti-copper-feeding sectional type conductive roller for electroplating a photovoltaic cell, which solves the technical problems of material loss, equipment abrasion and production interruption caused by unexpected electroplating (copper feeding) of a non-contact area immersed in liquid medicine under the action of parasitic potential due to integral conduction of the conductive roller in the existing continuous electroplating process of the photovoltaic cell. In order to achieve the above purpose, the invention provides an anti-copper-loading segmented conductive roller for electroplating a photovoltaic cell, which comprises an insulating roller, wherein a hollow rotating shaft is coaxially fixed inside the insulating roller, a plurality of groups of brush groups are annularly arranged inside the insulating roller along the circumferential direction of the insulating roller, each group of brush groups consists of a plurality of conductive pins axially arranged along the insulating roller, and each conductive pin is radially arranged along the insulating roller; One end of the conductive needle extends to the inner hole of the hollow rotating shaft, and the other end of the conductive needle stretches out of the outer surface of the insulating roller in a telescopic way; One end of the hollow rotating shaft is detachably connected with a conductive shaft, a plurality of sector electrodes are embedded in the conductive shaft along the radial direction, each sector electrode is connected with a conductive plate of a corresponding brush group through an independent wire, and the conductive roller further comprises an intermittent control mechanism for driving the conductive needle to radially stretch. Preferably, the outer circumferential surface of the sector electrode inside the conductive shaft is coplanar with and smoothly transits with the outer circumferential surface of the conductive shaft, and the number and angular arrangement of the sector electrodes correspond to the brush group on the insulating roller. Preferably, an insulating sleeve is fixedly arranged in the insulating roller along the radial direction, the insulating sleeve forms a guide channel for sliding insertion of the conductive needle, and two ends of the insulating sleeve extend to the inner cavity wall and the outer circumferential surface of the insulating roller respectively. Preferably, one end of the conductive needle in the inner hole of the hollow rotating shaft is a conical end, one end of the conical end with smaller taper faces the outer side of the insulating roller, and one end with larger taper faces the center direction of the hollow rotating shaft. Preferably, an elastic connecting piece is arranged in the inner hole of the hollow rotating shaft, the elastic connecting piece comprises a spring sleeved on the limiting rod, the spring acts on the conductive plate, and elastic force for enabling the conductive plate to move towards the center direction of the hollow rotating shaft is provided. Preferably, the limiting rod penetrates through the conducting plate, on