Lithium battery tab copper strip coating uniform distribution device

Abstract

The invention belongs to the technical field of lithium battery tab copper strips, and particularly relates to a lithium battery tab copper strip coating uniform distribution device which comprises an electroplating pool and a conveying belt arranged in the electroplating pool, the electroplating pool is used for electroplating a copper strip, and the conveying belt conveys the copper strip; clamping mechanisms are arranged on the two sides of the conveying belt and used for clamping a copper strip. The clamping mechanism comprises a clamping plate and a distance adjusting assembly arranged on the clamping plate, a plating groove in the conveying direction of the conveying belt is formed in the middle of the clamping plate, and the distance adjusting assembly is used for adjusting the distance between the electroplating groove holes. The uniform distribution device for the copper strip plating layer of the lithium battery tab has the effects of reducing deposition at two ends, improving the surface smoothness of a copper sheet and improving the yield.

Description

Technical Field

[0001] The invention belongs to the technical field of lithium battery tab copper strips, and in particular relates to a lithium battery tab copper strip plating uniform distribution device. Background Art

[0002] Lithium batteries are a type of battery that uses lithium metal or lithium alloy as positive / negative electrode materials and non-aqueous electrolyte solutions. Due to the highly active chemical properties of lithium metal, the processing, storage, and use of lithium metal have very high environmental requirements. With the development of science and technology, lithium batteries have become mainstream.

[0003] The tab is a raw material for lithium-ion polymer battery products. For example, mobile phone batteries, Bluetooth batteries, laptop batteries, etc. that we use in our lives all need tabs. Batteries are divided into positive and negative poles, and the tabs are metal conductors that lead the positive and negative poles out of the battery core. Generally speaking, the tabs at the positive and negative poles of the battery are the contact points during charging and discharging. This contact point is not the copper sheet we see on the outside of the battery, but a connection inside the battery. The tabs are divided into three types of materials. The positive electrode of the battery uses aluminum (Al) material, and the negative electrode uses nickel (Ni) material. The negative electrode also has copper-plated nickel (Ni-Cu) material. They are all composed of two parts: film and metal strip, as shown in the attached figure. Figure 1 .

[0004] The existing Chinese patent with the announcement number CN114141984A discloses a lithium battery and its negative electrode sheet, and a method for preparing the negative electrode sheet. In the present invention, the negative electrode sheet of the lithium battery includes: a negative electrode functional layer, including: a negative electrode current collector with a plurality of pores, a lithium-philic layer and a lithium-phobic layer, the negative electrode current collector has a first plating surface and a second plating surface that are relatively arranged, and the pores penetrate the negative electrode current collector from the first plating surface to the second plating surface; the lithium-philic layer is arranged on the first plating surface, and the lithium-phobic layer is arranged on the second plating surface; and an electrolyte layer, coated on the surface of the negative electrode functional layer, and at least part of the electrolyte layer is located in the pores.

[0005] Although this soft-pack lithium battery tab material can improve the volume energy density and mass energy density of the battery and extend the cycle life of the battery, in actual use, because lithium metal is deposited on the side where the lithium-philic layer is located through the electrolyte in the pores, it is easy to deposit on both ends of the copper sheet, resulting in bulging surfaces at both ends of the copper sheet, forming defective products. Summary of the invention

[0006] The purpose of the present invention is to provide a device for uniformly distributing the plating layer of a lithium battery tab copper strip, so as to solve the technical problem that deposition is easily carried out at both ends of a copper sheet, resulting in surface protrusions at both ends of the copper sheet and the formation of defective products, so as to achieve the purpose of reducing deposition at both ends, improving the surface smoothness of the copper sheet and improving the yield rate.

[0007] In order to solve the above technical problems, the present invention provides a lithium battery tab copper strip plating uniform distribution device, comprising:

[0008] An electroplating tank and a conveyor belt arranged in the electroplating tank, wherein the electroplating tank is used to electroplate a copper strip, and the conveyor belt conveys the copper strip;

[0009] Clamping mechanisms are provided on both sides of the conveyor belt, and the clamping mechanisms are used to clamp the copper belt;

[0010] The clamping mechanism includes a clamping plate and a spacing adjustment component arranged on the clamping plate. A plating groove along the conveying direction of the conveyor belt is opened in the middle of the clamping plate, and the spacing adjustment component is used to adjust the spacing of the plating groove holes.

[0011] Furthermore, the clamping plate is made of PVC plastic.

[0012] Furthermore, the spacing adjustment component includes an adjustment plate placed in contact with the clamping plate, the length of the adjustment plate is not less than the length of the electroplating slot hole, a fixing piece is arranged between the adjustment plate and the bonding plate, a waist-shaped hole is opened on the adjustment plate, and a fixing piece is arranged in the waist-shaped hole.

[0013] Furthermore, the fixing member is a bolt.

[0014] The beneficial effects of the present invention are:

[0015] 1. The clamping plate can clamp the upper and lower sides of the copper sheet, thereby reducing the accumulation of electroplating layers on the upper and lower sides of the copper sheet and improving the yield rate.

[0016] 2. Through the upper and lower spacing adjustment plate, it can be suitable for copper sheets of different specifications.

[0017] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of a lithium battery tab copper strip plating uniform distribution device of the present invention;

[0020] Figure 2It is a structural schematic diagram of a spacing adjustment component of a lithium battery tab copper strip plating uniform distribution device of the present invention;

[0021] Figure 3 is Table 2 of the present invention;

[0022] Figure 4 It is Table 3 of the present invention.

[0023] In the figure:

[0024] 1. Electroplating tank; 11. Conveyor belt;

[0025] 2. Clamping mechanism; 21. Clamping plate; 22. Coating tank;

[0026] 3. Spacing adjustment component; 31. Adjustment plate; 32. Waist-shaped hole; 33. Fixing piece. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Example:

[0029] like Figures 1 to 4 As shown, a device for uniformly distributing the plating layer of a lithium battery tab copper strip comprises: an electroplating cell 1 and a conveyor belt 11 arranged in the electroplating cell 1, wherein the electroplating cell 1 is used to electroplate the copper strip, and the conveyor belt 11 conveys the copper strip; clamping mechanisms 2 are arranged on both sides of the conveyor belt 11, and the clamping mechanisms 2 are used to clamp the copper strip.

[0030] The clamping mechanism 2 includes a clamping plate 21 and a spacing adjustment component 3 arranged on the clamping plate 21. A plating slot 22 along the conveying direction of the conveyor belt 11 is opened in the middle of the clamping plate 21. The spacing adjustment component 3 is used to adjust the spacing of the plating slot holes.

[0031] In this embodiment, the clamping plate 21 is made of PVC plastic so as not to affect the electroplating of the copper sheet.

[0032] The spacing adjustment component 3 includes an adjustment plate 31 placed on the clamping plate 21, the length of the adjustment plate 31 is not less than the length of the electroplating slot hole, a fixing part 33 is arranged between the adjustment plate 31 and the laminating plate, and a waist-shaped hole 32 is provided on the adjustment plate 31, and the length direction of the waist-shaped hole 32 is the width direction of the plating slot 22. The fixing part 33 is arranged in the waist-shaped hole 32, and the user can fix the adjustment plate 31 on the clamping plate 21 through the fixing part 33, and adjust the position of the copper sheet plating by covering a part of the plating slot 22 with the adjustment plate 31. When the width of the plated copper sheet is relatively large, loosen the fixing part 33, increase the part of the adjustment plate 31 covering the plating slot 22, and then tighten the fixing part 33.

[0033] Furthermore, the fixing member 33 may be, but is not limited to, a bolt.

[0034] The coating thickness process capability control is shown in the following table:

[0035] Table 1:

[0036]

[0037] like Figure 3 and Figure 4 As shown in Table 2 and Table 3, Table 2 and Table 3 are extended from the data in Table 1. The data in the embodiment are the data of the present application, and the comparative example is the data without using the clamping mechanism 2.

[0038] In summary, the clamping plate 21 can clamp the upper and lower sides of the copper sheet, thereby reducing the accumulation of electroplating layers on the upper and lower sides of the copper sheet and improving the yield rate. The upper and lower spacing adjustment plate 31 can be used for copper sheets of different specifications.

[0039] The various devices selected in this application are all universal standard parts or parts known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0040] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0042] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A lithium battery tab copper strip coating uniform distribution device, characterized in that: include: An electroplating bath (1) and a conveyor belt (11) disposed in the electroplating bath (1), wherein the electroplating bath (1) is used to electroplate a copper strip, and the conveyor belt (11) conveys the copper strip; Clamping mechanisms (2) are provided on both sides of the conveyor belt (11), and the clamping mechanisms (2) are used to clamp the copper belt; The clamping mechanism (2) comprises a clamping plate (21) and a spacing adjustment component (3) arranged on the clamping plate (21); a plating groove (22) is opened in the middle of the clamping plate (21) along the conveying direction of the conveyor belt (11); and the spacing adjustment component (3) is used to adjust the spacing of the plating groove holes.

2. A lithium battery tab copper strip plating uniform distribution device as claimed in claim 1, characterized in that: The clamping plate (21) is made of PVC plastic.

3. A lithium battery tab copper strip plating uniform distribution device as claimed in claim 2, characterized in that: The spacing adjustment component (3) comprises an adjustment plate (31) placed in contact with the clamping plate (21), the length of the adjustment plate (31) being not less than the length of the electroplating slot hole, a fixing member (33) being arranged between the adjustment plate (31) and the contact plate, a waist-shaped hole (32) being provided on the adjustment plate (31), and a fixing member (33) being arranged in the waist-shaped hole (32).

4. A lithium battery tab copper strip plating uniform distribution device as claimed in claim 3, characterized in that: The fixing member (33) is a bolt.

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