Liquid mixing device of electrolytic copper foil crude foil engine

Abstract

The utility model discloses a liquid mixing device of an electrolytic copper foil crude foil engine, which comprises a shell connected with a liquid inlet pipe and a liquid outlet pipe. A partition plate is arranged in the shell, and the inner space of the shell is divided into an upstream mixing area and a downstream flow equalizing area through the partition plate. A plurality of flow equalizing holes are formed in the partition plate, and the upstream mixing area is communicated with the downstream flow equalizing area through the flow equalizing holes; the liquid inlet pipe is connected with the downstream flow equalizing area, the liquid outlet pipe is connected with the upstream mixing area, and a baffling mechanism is arranged in the downstream flow equalizing area. Therefore, the mixing efficiency and the mixing uniformity of the mixer are remarkably improved, the flow equalizing precision is greatly improved, and the standard flow deviation of each branch pipe is less than or equal to 1.618; meanwhile, no extra power device is needed, liquid mixing and flow equalizing are achieved according to the hydrodynamic principle, more energy is saved, the environment is protected, and cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to electrolytic copper foil auxiliary production equipment technical field especially relates to a kind of electrolytic copper foil foil machine liquid mixing device. BACKGROUND

[0002] Lithium battery copper foil in foil electrolysis process, due to additive mixing in electrolyte is not sufficient, will lead to additive concentration imbalance in bath, causes plating layer thickness difference or rough, forms abnormal copper plating point, such as copper powder shedding, local crystalline thick. Bath composition imbalance (such as copper ion concentration is too high or acidity is insufficient) can exacerbate the unevenness of plating layer, even lead to surface appear dark spot or scratch quality problem.For this reason, industry uses liquid mixer to improve the composition imbalance problem of electrolyte, such as Figure 1 As shown in the prior art, the more common liquid mixer is a cylindrical pipe with a large diameter as a cylindrical shell 1', which is placed horizontally, and the circumferential front surface is connected to the inlet pipe 2, and the top is connected to several outlet pipes 3. This liquid mixer has small internal flow disturbance to the liquid, low mixing efficiency and insufficient flow uniformity, resulting in uneven mixing of electrolyte, internal pressure imbalance, and uneven flow of each outlet pipe, which leads to poor mixing effect. This in turn leads to local imbalance of copper ion concentration and acidity in the plating bath, affecting the uniform deposition of electrolyte, forming plating layer thickness fluctuation (such as local thin or thick), and uneven distribution of anode current density exacerbating plating layer crystallization thickening or loosening, reducing the tensile strength and elongation of copper foil. At the same time, the existing liquid mixer relies on external power source or only adjusts the flow by changing the pipe diameter, which has high energy consumption and poor stability, and cannot meet the strict requirements of high-end lithium battery copper foil for electrolyte uniformity. SUMMARY

[0003] The utility model provides a kind of electrolytic copper foil foil machine liquid mixing device for the shortcomings of prior art, which has more reasonable structure design, can produce effective flow disturbance to electrolyte, improve mixing efficiency and flow uniformity, and has better mixing effect.

[0004] To solve the above technical problems, the utility model adopts the following technical scheme: a kind of electrolytic copper foil foil machine liquid mixing device, including shell, the shell is connected with inlet pipe and outlet pipe;A partition is arranged in the shell, the internal space of the shell is divided into two parts by the partition, the upper part is upstream mixing zone, and the lower part is downstream flow uniformity zone;A plurality of flow uniformity holes are arranged on the partition, and the upstream mixing zone is communicated with the downstream flow uniformity zone through the flow uniformity holes;The inlet pipe is connected with the downstream flow uniformity zone, and the outlet pipe is connected with the upstream mixing zone;A baffle mechanism is arranged in the downstream flow uniformity zone, and the baffle mechanism is opposite to the inlet pipe.

[0005] Further, the cross section of the shell is trapezoidal structure, and the top width is smaller than the bottom width.

[0006] Preferably, the partition is arranged at 2 / 3 of the height of the shell.

[0007] Further, the aperture of the flow equalizing holes gradually increases from the middle to the two ends, the flow deflector is arranged at the middle position of the downstream flow equalizing area, and the liquid inlet pipe is arranged at the middle position of the lower part of the shell.

[0008] Further, the apertures of the flow equalizing holes are combined as φ12, φ15, φ18 and φ20, the apertures gradually increase from the middle to the two sides along the center of the partition, and the number of flow equalizing holes with various apertures is basically equivalent.

[0009] Preferably, the cross section of the shell is isosceles trapezoidal structure.

[0010] Further, the flow deflector comprises a plurality of flow deflectors, each flow deflector is divided into a plurality of rows, the flow deflectors of adjacent rows are arranged in a staggered manner, and each flow deflector is arranged with one of the edges facing forward.

[0011] Further, the main body of the flow deflector adopts a triangular prism, a V-shaped groove is arranged on the side wall of the triangular prism, and the V-shaped groove is arranged in the transverse direction; a support head is arranged at the top end of the triangular prism, and the support head supports the partition.

[0012] Further, the flow deflector comprises a single-groove flow deflector and a double-groove flow deflector, one V-shaped groove is arranged on each of the left and right side walls of the single-groove flow deflector, two V-shaped grooves are arranged on each of the left and right side walls of the double-groove flow deflector, each V-shaped groove is arranged in the transverse direction, and the angle of the V-shaped groove is 135 degrees.

[0013] Preferably, the first row is provided with a single-groove flow deflector, the front edge of the single-groove flow deflector is opposite to the center line of the liquid inlet pipe; the second row and the fourth row are opposite to each other and are provided with two double-groove flow deflectors, and the third row is provided with three single-groove flow deflectors.

[0014] Compared with the existing mixing device, the mixing device has the following advantages: 1. The mixing efficiency is significantly improved: the V-shaped flow deflector is used to build a gradient shear flow field, so that the uniformity of the additive mixing is improved by more than 60%, the occurrence rate of abnormal copper plating points on the surface of the plating layer is reduced by 75%, the bubble yarn defect is effectively improved, and the flatness of the copper foil surface is improved. 2. The flow equalizing precision is greatly improved: the flow equalizing partition with holes is combined with the trapezoidal cavity structure, so that the standard deviation of the flow of each branch pipe is less than or equal to 1.618 (the standard deviation of the prior art is greater than 5), the copper ion concentration fluctuation range in the plating tank is reduced to ± 2%, the acidity fluctuation is less than or equal to ± 1.5%, the plating layer thickness uniformity is improved by 40%, and the tensile strength and elongation are increased by 15% and 12% respectively.

[0015] Energy consumption and cost optimization: without additional power device, relying on the principle of liquid dynamics to realize the mixing liquid uniform flow, more than 30% energy saving than traditional device; yield from 85% to more than 95%, significantly reducing the waste of raw materials and post-processing cost.

[0016] Lithium battery performance enhancement: uniform plating structure can extend the cycle life of lithium battery by 10%-15%, reduce the risk of battery short circuit and fire caused by copper foil defects, meet the stringent requirements of high-end power lithium battery on liquid collecting materials. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The existing technology is a schematic diagram of a mixing liquid device;

[0018] Figure 2 The structure of the utility model is a schematic diagram;

[0019] Figure 3 The internal structure of the utility model is a schematic diagram;

[0020] Figure 4 The internal structure of the utility model after the partition is removed is a schematic diagram;

[0021] Figure 5 The arrangement of the baffle is a schematic diagram;

[0022] Figure 6 The structure of the single-slot baffle is a schematic diagram;

[0023] Figure 7 The structure of the double-slot baffle is a schematic diagram;

[0024] Figure 8 The liquid finite element analysis simulation cloud chart of the utility model is a schematic diagram;

[0025] Figure 9 The outflow pipe flow fitting analysis curve diagram of the utility model is a schematic diagram.

[0026] In the figure, 1' is a cylindrical shell, 1 is a shell, 2 is an inlet pipe, 3 is an outlet pipe, 4 is a partition, 51 is a single-slot baffle, 52 is a double-slot baffle, 53 is a triangular prism, 54 is a V-shaped groove, and 55 is a support head. DETAILED DESCRIPTION

[0027] In this embodiment, refer to Figures 1-7The electrolytic copper foil raw foil machine mixing device, comprising a shell 1, the shell 1 is connected with liquid inlet pipe 2 and liquid outlet pipe 3;A partition 4 is arranged in the shell 1, the internal space of the shell 1 is divided into two parts by the partition 4, the upper part is the upstream mixing zone, and the lower part is the downstream flow equalization zone;A plurality of flow equalization holes are arranged on the partition 4, and the upstream mixing zone is communicated with the downstream flow equalization zone through the flow equalization holes;The liquid inlet pipe 2 is connected with the downstream flow equalization zone, and the liquid outlet pipe 3 is connected with the upstream mixing zone;A baffle mechanism is arranged in the downstream flow equalization zone, and the baffle mechanism is opposite to the liquid inlet pipe 2.

[0028] The cross section of the shell 1 is trapezoidal structure, preferably isosceles trapezoidal structure, the top width is less than the bottom width.

[0029] The partition 4 is arranged at about 2 / 3 of the height of the shell 1, the hole diameter of the flow equalization hole gradually increases from the middle to both ends, the baffle mechanism is arranged at the middle position of the downstream flow equalization zone, and the liquid inlet pipe 2 is arranged at the middle position of the lower part of the shell 1.

[0030] The hole diameter of the flow equalization hole is φ12, φ15, φ18 and φ20, the hole diameter increases step by step along the center of the partition 4 to both sides, and the number of flow equalization holes with various hole diameters is basically equivalent.

[0031] The baffle mechanism comprises a plurality of baffles, each baffle is divided into a plurality of rows, the baffles of adjacent rows are arranged in a staggered manner, and each baffle is arranged with one edge facing forward.

[0032] The main body of the baffle is a triangular prism 53, a V-shaped groove 54 is arranged on the side wall of the triangular prism 53, and the V-shaped groove 54 is arranged in the transverse direction;A support head 55 is arranged at the top end of the triangular prism 53, and the support head 55 abuts against the partition 4.

[0033] The baffle comprises a single-groove baffle 51 and a double-groove baffle 52, a V-shaped groove 54 is arranged on the left and right side walls of the single-groove baffle 51 respectively, and two V-shaped grooves 54 are arranged on the left and right side walls of the double-groove baffle 52 respectively, each V-shaped groove 54 is arranged in the transverse direction, and the angle of the V-shaped groove 54 is 135 degrees.

[0034] The first row is provided with a single-groove baffle 51, the front edge of which is opposite to the center line of the liquid inlet pipe 2, so as to form a structure for separating the liquid inlet to both sides;The second row and the fourth row are opposite to each other and are provided with two double-groove baffles 52, and the third row is provided with three single-groove baffles 51.

[0035] Working principle

[0036] 1. Turbulent flow reinforced mixing: the electrolyte enters the housing 1 from the inlet pipe 2, first impacting the baffle, the baffle cuts the liquid through the 135-degree V-shaped groove 54 (cut) for directional cutting, forcing the liquid to change direction and speed, inducing strong turbulence and shear force, significantly increasing the contact area and collision frequency of liquid molecules, accelerating the diffusion and dissolution of additives in the copper sulfate solution, and achieving uniform mixing.

[0037] Static pressure balance control: the mixed liquid after the baffle enters the baffle plate 4 with flow holes, and the baffle plate 4 adjusts the resistance of each flow passage through the pore size gradient distribution to make the static pressure in the mixer uniformly distributed along the horizontal direction, and finally realizes the flow standard deviation of each outlet pipe 3 ≤1.618, ensuring the high consistency of the electrolyte concentration, acidity and flow in the plating tank, as shown in Figure 9 .

[0038] Flow field optimization design: the trapezoidal cavity structure of the housing 1 is optimized through liquid finite element analysis, effectively suppressing boundary layer separation and vortex formation, cooperating with the baffle and flow distribution baffle, and building a "impact mixing-turbulent diffusion-static pressure balance" three-level flow field regulation system, which can realize efficient mixing and precise flow distribution without external power source. As shown in Figure 8 , the liquid finite element simulation analysis of the mixer shows the internal static pressure distribution and flow field optimization effect of the housing 1.

[0039] The above has made a detailed description of the utility model, the above is only a preferred embodiment of the utility model, which cannot limit the scope of the utility model, that is, any equivalent changes and modifications made within the scope of the application shall still fall within the scope of the utility model.

Claims

1. An electrolytic copper foil production machine liquid mixing device, comprising a housing, the housing being connected with a liquid inlet pipe and a liquid outlet pipe, characterized in that: A partition is arranged in the shell, and the interior space of the shell is divided into two parts by the partition, i.e. an upstream mixing zone and a downstream flow-equalizing zone; a plurality of flow-equalizing holes are arranged on the partition, and the upstream mixing zone and the downstream flow-equalizing zone are communicated through the flow-equalizing holes; a liquid inlet pipe is connected to the downstream flow-equalizing zone, and a liquid outlet pipe is connected to the upstream mixing zone; a baffle mechanism is arranged in the downstream flow-equalizing zone, and the baffle mechanism is opposite to the liquid inlet pipe.

2. The electrolytic copper foil jelly roll apparatus of claim 1, wherein: The cross section of the shell is in trapezoidal structure, and the top width is smaller than the bottom width.

3. The electrolytic copper foil jelly roll apparatus of claim 1, wherein: The partition is arranged at 2 / 3 of the height of the shell.

4. The electrolytic copper foil jelly roll apparatus according to claim 1 or 3, wherein: The hole diameter of the flow-equalizing holes gradually increases from the middle to the two ends, the baffle mechanism is arranged at the middle position of the downstream flow-equalizing zone, and the liquid inlet pipe is arranged at the middle position of the lower part of the shell.

5. The electrolytic copper foil jelly roll apparatus of claim 4, wherein: The hole diameters of the flow-equalizing holes are φ12, φ15, φ18 and φ20, the hole diameters increase in steps along the center of the partition to the two sides, and the number of flow-equalizing holes with various hole diameters is basically the same.

6. The electrolytic copper foil jelly roll apparatus of claim 2, wherein: The cross section of the shell is in isosceles trapezoidal structure.

7. The electrolytic copper foil jelly roll apparatus of claim 1, wherein: The baffle mechanism comprises a plurality of baffles, each baffle is divided into a plurality of front and rear rows, the baffles of adjacent rows are arranged in mutual staggered manner, and each baffle is arranged in structure with one edge facing forward.

8. The electrolytic copper foil jelly roll apparatus of claim 7, wherein: The main body of the baffle is a triangular prism, a V-shaped groove is arranged on the side wall of the triangular prism, and the V-shaped groove is arranged in the transverse direction; a support head is arranged at the top end of the triangular prism, and the support head supports the partition.

9. The electrolytic copper foil jelly roll apparatus of claim 8, wherein: The baffle comprises a single-groove baffle and a double-groove baffle, one V-shaped groove is arranged on each of the left and right side walls of the single-groove baffle, two V-shaped grooves are arranged on each of the left and right side walls of the double-groove baffle, each V-shaped groove is arranged in the transverse direction, and the angle of the V-shaped groove is 135 degrees.

10. The electrolytic copper foil jelly roll apparatus of claim 9, wherein: The first row is provided with one single-groove baffle, and the front edge thereof is opposite to the center line of the liquid inlet pipe; the second row and the fourth row are mutually adjusted and each is provided with two double-groove baffles, and the third row is provided with three single-groove baffles.

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