Horizontal electroplating cathode conductive roller and horizontal electroplating device

Abstract

The utility model relates to the technical field of solar cell plating, and specifically discloses a horizontal plating cathode conductive roller and a horizontal plating device, the conductive roller comprises a roller main body, the side wall of the roller main body is recessed to form an avoidance groove along the axis direction close to the conductive roller, a plurality of avoidance grooves are arranged along the axis direction of the roller main body at intervals, and a contact part for contacting a battery piece to be processed is arranged between adjacent avoidance grooves, wherein, in the axis direction of the roller main body, the distance between the ends of adjacent avoidance grooves away from each other is greater than the width of the battery piece to be processed, and the distance between the ends of adjacent avoidance grooves close to each other is less than the width of the battery piece to be processed. The conductive roller of the utility model can effectively avoid problems such as silicon peeling, fragmentation and hidden cracking of the edge of the battery piece during the horizontal plating process, and improves the product yield.

Description

Technical Field

[0001] This utility model relates to the field of solar cell electroplating technology, and in particular to a horizontal electroplating cathode conductive roller and a horizontal electroplating device. Background Technology

[0002] In existing technologies, horizontal electroplating equipment is commonly used for metallization electroplating of solar cells. During the horizontal electroplating process, the solar cells are transported horizontally and come into contact with the cathode conductive rollers. Current is transferred to the solar cells through the cathode conductive rollers, and the anode is simultaneously powered to form a closed circuit. The main body of the existing cathode conductive rollers is a conventional cylindrical structure, which can easily damage the edges of the solar cells during use, causing problems such as edge silicon detachment, fragmentation, and microcracks, thus affecting product yield. Utility Model Content

[0003] The purpose of this invention is to provide a horizontal electroplating cathode conductive roller and a horizontal electroplating device, addressing the current state of the technology.

[0004] The conductive roller of this invention can effectively avoid problems such as silicon detachment, fragmentation, and microcracks that easily occur at the edges of battery cells during horizontal electroplating, thereby improving product yield.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] On the one hand, this utility model provides a horizontal electroplating cathode conductive roller, including a roller body, the side wall of the roller body is recessed along the axial direction close to the conductive roller to form a relief groove, the roller body is provided with a plurality of relief grooves at intervals along its axial direction, and a contact portion for contacting the battery cell to be processed is provided between adjacent relief grooves.

[0007] In the axial direction of the roller body, the distance between the ends of adjacent clearance grooves that are far apart from each other is greater than the width of the battery cell to be processed, and the distance between the ends of adjacent clearance grooves that are close to each other is less than the width of the battery cell to be processed.

[0008] In some embodiments, the distance between adjacent clearance slots at one end away from each other is:

[0009] L1 = L2 + 60mm

[0010] In the formula, L1 is the distance between the ends of adjacent clearance slots that are far apart from each other, and L2 is the distance between the ends of adjacent clearance slots that are close to each other.

[0011] And / or, the distance between adjacent clearance slots at one end is:

[0012] L2 = W - 2L a ,

[0013] In the formula, L2 is the distance between the two ends of adjacent clearance slots, W is the width of the battery cell to be processed, and L... a The first axial distance is the distance from the edge of the corresponding side of the battery cell to the end of the clearance groove near the battery cell in the axial direction of the roller body.

[0014] In some embodiments, in the axial direction of the roller body, the distance between the clearance groove and its adjacent battery cell to be processed, from the edge of the corresponding side of the battery cell to be processed to the end of the clearance groove near the battery cell to be processed, is a first axial distance, and the first axial distance is at least 5 mm.

[0015] In some embodiments, the first axial distance is 5mm to 10mm.

[0016] In some embodiments, the opening width of the clearance groove is 20mm to 40mm in the axial direction of the roller body.

[0017] In some embodiments, the distance from the opening of the clearance groove to the axis of the roller body is a first radial distance, and the ratio between the depth of the clearance groove and the first radial distance does not exceed 20%.

[0018] In some embodiments, the depth of the clearance groove is at least 0.5 mm.

[0019] In some embodiments, the depth of the clearance groove is 0.5 mm to 2 mm.

[0020] In some embodiments, the axial cross-sectional profile of the clearance groove on one side of the axis of the roller body is any one of a rectangle, a trapezoid, or a circular arc.

[0021] On the other hand, this utility model provides a horizontal electroplating apparatus, including the above-mentioned horizontal electroplating cathode conductive roller.

[0022] The beneficial effects of this utility model are as follows:

[0023] In this invention, recessed clearance grooves are provided on the roller body along the axis close to the conductive roller, and contact portions are formed between adjacent clearance grooves. This creates a height difference between the roller body and the clearance grooves and the contact portions, and the distance between the ends of adjacent clearance grooves that are furthest from each other (first distance L1) is greater than the width W of the battery cell to be processed, while the distance between the ends of adjacent clearance grooves that are closest to each other (second distance L2) is less than the width W of the battery cell to be processed. As a result, during the electroplating process, when the battery cell to be processed is horizontally conveyed along the vertical direction of the conductive roller axis, the projections of the two sides of the battery cell to be processed located between adjacent clearance grooves on the conductive roller fall exactly on the corresponding clearance grooves. The height difference between the clearance grooves and the contact portions prevents the edges of the battery cell to be processed from contacting the sidewalls of the conductive roller, effectively avoiding problems such as silicon detachment, fragmentation, and microcracks that are prone to occur at the edges of the battery cell during horizontal electroplating, thus improving product yield. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of a horizontal electroplated cathode conductive roller according to an embodiment of the present invention.

[0025] Figure 2 This is a perspective view of a horizontal electroplated cathode conductive roller according to an embodiment of the present invention.

[0026] Figure 3 This is a side view of a horizontal electroplated cathode conductive roller according to an embodiment of the present invention.

[0027] Figure 4 This is a side view of a horizontal electroplated cathode conductive roller (the axial cross-sectional profile of the clearance groove on one side of the axis of the roller body is rectangular) according to an embodiment of the present invention.

[0028] Figure 5 This is a side view of a horizontal electroplated cathode conductive roller (the axial cross-sectional profile of the clearance groove on one side of the axis of the roller body is trapezoidal) according to an embodiment of the present invention.

[0029] Figure 6 This is a side view of a horizontal electroplated cathode conductive roller (the axial cross-sectional profile of the clearance groove on one side of the axis of the roller body is arc-shaped) according to an embodiment of the present utility model.

[0030] Figure 7 This is a schematic diagram of a horizontal electroplating apparatus according to an embodiment of the present invention.

[0031] In the picture:

[0032] Conductive roller 1; roller body 11; clearance groove 12; opening 121; groove bottom 122; contact part 13; rotating shaft section 14;

[0033] Anode assembly 2;

[0034] Electroplating tank 3;

[0035] 4. Battery cells to be processed. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model. Furthermore, it should be understood that the specific embodiments described herein are merely for explaining this utility model and are not intended to limit this utility model.

[0037] In the description of this utility model, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," etc., may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "multiple" or "several" means two or more, unless otherwise explicitly specified.

[0038] In the description of this utility model, unless otherwise expressly specified and limited, the first feature "above" or "below" the second feature may include the first feature and the second feature being in direct contact, or the first feature and the second feature not being in direct contact but being in contact through another feature between them.

[0039] See Figures 1 to 3 As shown, this utility model embodiment discloses a horizontal electroplating cathode conductive roller, including a roller body 11. The side wall of the roller body 11 is recessed along the axial direction close to the conductive roller 1 to form a relief groove 12. The roller body 11 is provided with a plurality of relief grooves 12 at intervals along its axial direction. A contact portion 13 for contacting the battery cell 4 to be processed is provided between adjacent relief grooves 12.

[0040] In the axial direction of the roller body 11, the distance between the ends of adjacent clearance grooves 12 that are far apart from each other (first distance L1) is greater than the width W of the battery cell 4 to be processed, and the distance between the ends of adjacent clearance grooves 12 that are close to each other (second distance L2) is less than the width W of the battery cell 4 to be processed.

[0041] In this invention, a recessed clearance groove 12 is provided on the roller body 11 along the axial direction close to the conductive roller 1, and a contact portion 13 is formed between adjacent clearance grooves 12. This results in a height difference between the roller body 11 and the clearance groove 12 and the contact portion 13, and the distance between the ends of adjacent clearance grooves 12 that are far apart from each other (first distance L1) is greater than the width W of the battery cell 4 to be processed, and the distance between the ends of adjacent clearance grooves 12 that are close to each other (second distance L2) is less than the width W of the battery cell 4 to be processed. As a result, during the electroplating process, when the battery cell 4 to be processed is horizontally conveyed along the vertical direction of the axis of the conductive roller 1, the projections of the two sides of the battery cell 4 to be processed located between adjacent clearance grooves 12 on the conductive roller 1 fall exactly on the corresponding clearance groove 12. The height difference between the clearance groove 12 and the contact portion 13 prevents the edge of the battery cell 4 to be processed from contacting the side wall of the conductive roller 1, effectively avoiding problems such as silicon detachment, fragmentation, and microcracks that are prone to occur at the edge of the battery cell during horizontal electroplating, and improving the product yield.

[0042] Understandably, in the axial direction of the roller body 11, the width of the opening 121 of the clearance groove 12 and the width of the groove bottom 122 of the clearance groove 12 can be the same or different. When the width of the opening 121 of the clearance groove 12 and the width of the groove bottom 122 of the clearance groove 12 are different, the first distance L1 and the second distance L2 are based on the width of the opening 121 of the clearance groove 12. That is, the distance between the ends of adjacent clearance grooves 12 that are far away from each other (the first distance L1) is the distance between the ends of the openings 121 of adjacent clearance grooves 12 that are far away from each other, and the distance between the ends of adjacent clearance grooves 12 that are close to each other (the second distance L2) is the distance between the ends of the openings 121 of adjacent clearance grooves 12 that are close to each other, so as to better ensure that the edge of the battery cell 4 to be processed does not contact the side wall of the conductive roller 1 and improve the product yield.

[0043] Understandable, see Figure 1 and Figure 4 As shown, the number of clearance grooves 12 on the roller body 11 can be set according to actual needs. For example, the number of clearance grooves 12 on the roller body 11 can be 2, 3, 4 or 5, but is not limited to this.

[0044] In some embodiments, see Figure 1 and Figure 3 As shown, the distance (first distance L1) between the ends of adjacent clearance slots 12 that are far apart from each other is:

[0045] L1 = L2 + 60mm

[0046] In the formula, L1 is the distance between the ends of adjacent clearance slots 12 that are far apart from each other, and L2 is the distance between the ends of adjacent clearance slots 12 that are close to each other.

[0047] And / or, the distance between adjacent clearance slots 12 at one end is:

[0048] L2 = W - 2L a ,

[0049] In the formula, L2 is the distance between the two ends of adjacent clearance grooves 12, W is the width of the battery cell 4 to be processed, and L a The first axial distance is the distance from the edge of the corresponding side of the battery cell 4 to the end of the clearance groove 12 near the battery cell 4 in the axial direction of the roller body 11.

[0050] During the conveying process, the battery cell 4 to be processed may have a slight deviation along the vertical direction of the conveying (that is, the axial direction of the conductive roller 1). If the first distance L1 is too small relative to the width W of the battery cell 4 to be processed, it is easy to increase the risk that the edge of the battery cell 4 to be processed will come into contact with the side wall of the conductive roller 1. If the first distance L1 is too large relative to the width W of the battery cell 4 to be processed, it is easy to cause unnecessary waste of electroplating solution and energy.

[0051] Understandably, L2 < W, therefore, L2 = W - 2L a In the middle, L a >0.

[0052] In some embodiments, see Figure 1 and Figure 3 As shown, in the axial direction of the roller body 11, the distance from the edge of the corresponding side of the battery cell 4 to the end of the clearance groove 12 near the battery cell 4 is the first axial distance L between the clearance groove 12 and the adjacent battery cell 4 to be processed. a First axial distance L a The thickness is at least 5mm, which can effectively ensure that the edge of the battery cell 4 to be processed will not come into contact with the side wall of the conductive roller 1, and effectively avoid problems such as silicon detachment, fragmentation, and microcracks that are prone to occur at the edge of the battery cell during the horizontal electroplating process.

[0053] In some embodiments, preferably, the first axial distance L a It is 5mm to 10mm.

[0054] For example, the first axial distance L a The thickness can be 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm, 8mm, 8.5mm, 9mm, 9.5mm or 10mm, but is not limited to these.

[0055] In some embodiments, preferably, the width of the opening 121 of the clearance groove 12 in the axial direction of the roller body 11 is 20mm to 40mm.

[0056] For example, the width of the opening 121 of the clearance groove 12 is 20mm, 22mm, 25mm, 28mm, 30mm, 32mm, 35mm, 38mm or 40mm, but is not limited thereto.

[0057] Within this range, the clearance groove 12 has a sufficient opening 121 width to effectively ensure that the edge of the battery cell 4 to be processed will not come into contact with the side wall of the conductive roller 1, effectively avoiding problems such as silicon detachment, fragmentation, and microcracks that are prone to occur at the edge of the battery cell during horizontal electroplating. At the same time, it can prevent the opening 121 from being too large, resulting in a large distance between adjacent battery cells 4 to be processed, thus causing unnecessary waste of electroplating solution and energy.

[0058] In some embodiments, see Figure 1 and Figure 3 As shown, the distance from the opening 121 of the clearance groove 12 to the axis of the roller body 11 is a first radial distance R. The ratio between the depth H of the clearance groove 12 and the first radial distance R does not exceed 20%. This ensures that the roller body 11 has sufficient strength based on the clearance groove 12. For example, the ratio between the depth H of the clearance groove 12 and the first radial distance R can be 2%, 5%, 8%, 10%, 12%, 15%, 18%, or 20%, but is not limited to these. Preferably, the ratio between the depth H of the clearance groove 12 and the first radial distance R does not exceed 5%.

[0059] In some embodiments, see Figure 1 and Figure 3 As shown, the depth H of the clearance groove 12 is at least 0.5 mm.

[0060] Understandably, the depth H of the clearance groove 12 refers to the distance from the opening 121 of the clearance groove 12 to the bottom 122 of the clearance groove 12.

[0061] In some embodiments, preferably, the depth H of the clearance groove 12 is 0.5 mm to 2 mm.

[0062] For example, the depth H of the clearance groove 12 is 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm or 2.0mm, but is not limited thereto.

[0063] In some embodiments, see Figures 3 to 6 As shown, the axial cross-sectional profile of the clearance groove 12 on one side of the axis of the roller body 11 is any one of rectangle, trapezoid, or arc.

[0064] It is understandable that the shapes of the multiple clearance grooves 12 on the same conductive roller 1 can be the same or different.

[0065] In some embodiments, the material of the roller body 11 may be stainless steel, copper, copper alloy, titanium, titanium alloy, etc., but is not limited thereto.

[0066] In some embodiments, the roller body 11 includes a base and a covering layer covering the outside of the base.

[0067] For example, the substrate material can be stainless steel, copper, copper alloy, titanium, titanium alloy, etc., but is not limited to these, so that the conductive roller 1 has better conductivity and strength.

[0068] By covering the substrate with a coating layer, the conductivity, corrosion resistance, and cushioning performance of the roller body 11 are improved, thereby enhancing the overall performance of the conductive roller 1.

[0069] For example, the coating layer can be a metal plating or a conductive polymer coating, but is not limited to these. Among them, the metal plating can be a chromium plating, nickel plating, platinum plating, rhodium plating, etc. By setting a metal plating, the conductive roller 1 can be given better corrosion resistance.

[0070] The conductive polymer coating can be a conductive rubber layer or a conductive polytetrafluoroethylene (PTFE) coating. By introducing conductive fillers such as graphene and metal fibers into the coating, the rubber coating or PTFE coating can acquire better conductivity. The addition of a conductive rubber layer or conductive PTFE coating can alleviate contact stress and reduce the risk of fragmentation and microcracks.

[0071] On the other hand, see Figure 7 As shown, this utility model provides a horizontal electroplating apparatus, including the aforementioned horizontal electroplating cathode conductive roller 1.

[0072] In some embodiments, in a horizontal electroplating apparatus, a plurality of conductive rollers 1 are arranged at intervals along the conveying direction of the battery cells, and the conveying direction of the battery cells is perpendicular to the axial direction of the conductive rollers 1.

[0073] In some embodiments, the roller body 11 has shaft sections 14 at both ends in the axial direction for connecting a rotating power component. Specifically, the rotating power component may be a motor.

[0074] Understandably, in a horizontal electroplating apparatus, several conductive rollers 1 are arranged along the conveying direction of the battery to be processed, and the axial direction of the conductive rollers 1 is set along the vertical direction of the conveying of the battery to be processed.

[0075] Understandably, the horizontal electroplating apparatus also includes an electroplating tank 3 and an anode assembly 2. The conductive roller 1 and the anode assembly 2 are located in the electroplating tank 3. For example, the anode assembly 2 can be located below the conductive roller 1.

[0076] In the description of this specification, references to terms such as "some embodiments," "exemplary," "example," or "for example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0077] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A horizontally electroplated cathode conductive roller, comprising a roller body, characterized in that, The sidewall of the roller body is recessed along the axial direction close to the conductive roller to form a relief groove. The roller body has a plurality of relief grooves arranged at intervals along its axial direction. A contact portion for contacting the battery cell to be processed is provided between adjacent relief grooves. In the axial direction of the roller body, the distance between the ends of adjacent clearance grooves that are far apart from each other is greater than the width of the battery cell to be processed, and the distance between the ends of adjacent clearance grooves that are close to each other is less than the width of the battery cell to be processed.

2. The horizontal electroplating cathode conductive roller according to claim 1, characterized in that, The distance between the two adjacent clearance slots at their furthest ends is: L1 = L2 + 60mm In the formula, L1 is the distance between the ends of adjacent clearance slots that are far apart from each other, and L2 is the distance between the ends of adjacent clearance slots that are close to each other. And / or, the distance between adjacent clearance slots at one end is: L2=W-2L a , In the formula, L2 is the distance between the adjacent clearance slots at one end, W is the width of the battery cell to be processed, and L... a The first axial distance is the distance from the edge of the corresponding side of the battery cell to the end of the clearance groove near the battery cell in the axial direction of the roller body.

3. The horizontal electroplating cathode conductive roller according to claim 1, characterized in that, In the axial direction of the roller body, the distance from the edge of the corresponding side of the battery cell to the end of the clearance groove near the battery cell to be processed between the clearance groove and the adjacent battery cell to be processed is the first axial distance, and the first axial distance is at least 5mm.

4. A horizontal electroplated cathode conductive roller according to claim 3, characterized in that, The first axial distance is 5mm to 10mm.

5. A horizontal electroplated cathode conductive roller according to claim 1, characterized in that, In the axial direction of the roller body, the opening width of the clearance groove is 20mm to 40mm.

6. A horizontal electroplated cathode conductive roller according to claim 1, characterized in that, The distance from the opening of the clearance groove to the axis of the roller body is a first radial distance, and the ratio between the depth of the clearance groove and the first radial distance does not exceed 20%.

7. A horizontal electroplated cathode conductive roller according to claim 1, characterized in that, The depth of the clearance groove is at least 0.5 mm.

8. A horizontal electroplated cathode conductive roller according to claim 7, characterized in that, The depth of the clearance groove is 0.5mm to 2mm.

9. A horizontal electroplated cathode conductive roller according to claim 1, characterized in that, The axial cross-sectional profile of the clearance groove on one side of the axis of the roller body is any one of rectangular, trapezoidal, or circular arc.

10. A horizontal electroplating apparatus, characterized in that, Includes the horizontal electroplated cathode conductive roller according to any one of claims 1 to 9.

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