Electrolytic bath

Abstract

The utility model discloses an electrolytic bath. The electrolytic bath comprises a reaction tank, and a cathode plate and an anode plate are arranged in the reaction tank and are oppositely arranged; the reaction tank is provided with a reaction tank liquid inlet, and the reaction tank liquid inlet is located on a bottom plate of the reaction tank or located on the side face of the reaction tank and close to the bottom face of the reaction tank; a liquid inlet of the reaction tank is arranged between the cathode plate and the anode plate; the electrolytic bath further comprises a liquid storage tank and a liquid pump; the liquid storage tank is provided with a liquid storage tank liquid outlet, and the liquid pump is provided with a liquid pump liquid inlet and a liquid pump liquid outlet; the liquid inlet of the reaction tank is connected with the liquid outlet of the liquid pump through a first liquid pipe, and the liquid inlet of the liquid pump is connected with the liquid outlet of the liquid storage tank through a second liquid pipe. According to the utility model, the plate-type anode and cathode are adopted, and the reaction tank and the liquid storage tank form a circulating system, so that the stability of electrolyte components is ensured under the condition that the equipment is simple, and the structure property of the copper foil can be accurately reflected.

Description

TECHNICAL FIELD

[0001] The utility model relates to an electrolytic cell. BACKGROUND

[0002] As a key material of lithium ion battery negative electrode current collector, copper foil is crucial for improving the energy density, cycle stability and other performance indicators of the battery. With the sharp growth of the demand for lithium battery market, especially the wide application in the fields of 3C products, new energy power vehicles, two-wheeled electric vehicles, aerospace and medical equipment, the demand for copper foil not only increases greatly in quantity, but also becomes increasingly strict in quality requirements. In order to meet the requirements of high-performance lithium battery on energy density and cycle life, copper foil needs to be optimized in terms of lightness, glossiness and mechanical strength.

[0003] At present, the electrolytic cell equipment adopted in industry is complex in connection and large in size, which is inconvenient for exploring process parameters. Hall tank is often used in laboratory exploration to explore process parameters. However, Hall tank has limitations in reflecting the organizational performance of copper foil, which is difficult to accurately evaluate. UTILITY MODEL CONTENTS

[0004] The technical problem to be solved by the utility model is to overcome the defects of complex connection, large size or difficulty in accurately evaluating the organizational performance of copper foil in the prior art electrolytic cell for electrolytic copper foil, and to provide an electrolytic cell. The utility model adopts plate-type anode and cathode, and simultaneously forms a circulating system with the reaction tank (1) and the liquid storage tank (2), so that the stability of the electrolyte composition is ensured under the condition of simple equipment, and the organizational performance of the copper foil can be accurately reflected.

[0005] The utility model solves the above technical problems through the following technical solutions:

[0006] The utility model provides a kind of electrolytic cell, including reaction tank (1), the cathode plate (12) and anode plate (13) are equipped in the reaction tank (1), the cathode plate (12) and the anode plate (13) are oppositely arranged;The reaction tank (1) is equipped with reaction tank liquid inlet (11), and the reaction tank liquid inlet (11) is located on the bottom plate (7) of the reaction tank (1), or is located on the side of the reaction tank (1), near the position of the bottom surface of reaction tank (1);Reaction tank liquid inlet (11) is located between cathode plate (12) and anode plate (13);

[0007] The electrolytic cell further comprises a liquid storage tank (2) and a liquid pump (3); the liquid storage tank (2) is provided with a liquid storage tank liquid outlet (21), and the liquid pump (3) is provided with a liquid pump liquid inlet (31) and a liquid pump liquid outlet (32); the reaction tank liquid inlet (11) and the liquid pump liquid outlet (32) are connected through a first liquid pipe (5), and the liquid pump liquid inlet (31) and the liquid storage tank liquid outlet (21) are connected through a second liquid pipe (6).

[0008] In the utility model, the cathode and the anode can all adopt the plate type, and by controlling the position relationship of the cathode plate and the anode plate and the liquid inlet direction of the electrolyte, the even and ultra-thin copper foil can be prepared.

[0009] In the utility model, preferably, the electrolytic cell further comprises a first side plate (14) and a second side plate (15), the first side plate (14) and the second side plate (15) are oppositely arranged, the first side plate (14) is sealingly connected to one end side edge of the cathode plate (12) and the anode plate (13), and the second side plate (15) is sealingly connected to the other end side edge of the cathode plate (12) and the anode plate (13); the cathode plate (12), the anode plate (13), the first side plate (14) and the second side plate (15) surround to form a reaction cavity with an open top end.

[0010] Preferably, the first side plate (14) and the second side plate (15) are arranged in parallel.

[0011] Preferably, the height of the first side plate (14) or the second side plate (15) is less than the height of the cathode plate (12) or the anode plate (13).

[0012] Preferably, the width of the first side plate (14) or the second side plate (15) is not less than the distance between the cathode plate (12) and the anode plate (13).

[0013] Preferably, the size of the first side plate (14) or the second side plate (15) is 200mm*100mm*10mm.

[0014] Preferably, the bottom ends of the cathode plate (12), the anode plate (13), the first side plate (14) and the second side plate (15) respectively abut against the bottom plate (7). The reaction tank is divided into two chambers, a reaction cavity and an outer cavity, and the electrodeposition reaction mainly occurs in the reaction cavity.

[0015] Preferably, at least one through hole (71) is arranged on the outer side of the reaction cavity on the bottom plate (7) to flow the overflowed electrolyte back to the liquid storage tank (2).

[0016] Preferably, the reaction tank inlet (11) is arranged on the bottom plate (7) and located inside the reaction cavity.

[0017] Generally, the liquid pump (3) is used to deliver the electrolyte in the liquid storage tank (2) to the reaction tank (1), and the electrolyte enters from the bottom of the reaction cavity, and when the volume exceeds the volume of the reaction cavity, the electrolyte overflows from above the first side plate (14) and the second side plate (15), flows to the outer cavity, and flows to the liquid storage tank (2) through the through hole (71), forming a circulation system.

[0018] Preferably, the first side plate (14) or the second side plate (15) is made of polypropylene PP or acrylic PMMA.

[0019] In the utility model, preferably, the cathode plate (12) and the anode plate (13) are arranged in parallel.

[0020] In the utility model, preferably, the distance between the cathode plate (12) and the anode plate (13) is 50-200mm.

[0021] In the utility model, preferably, the cathode plate (12) is made of titanium plate.

[0022] In the utility model, preferably, the surface roughness Ra of the cathode plate (12) is 0.03-0.08 μm.

[0023] In the utility model, preferably, the glossiness of the cathode plate (12) is 250-350GU.

[0024] In the utility model, preferably, the anode plate (13) is made of titanium plate with iridium tantalum coating.

[0025] In the utility model, preferably, the size of the cathode plate (12) or the anode plate (13) is height x width x thickness, which is 250mm x 100mm x 2mm.

[0026] Preferably, the effective area of the cathode plate (12) is height x width, which is 100mm x 80mm.

[0027] In the utility model, preferably, the reaction tank (1) is located above the liquid storage tank (2), and the reaction tank (1) is adjacent to the liquid storage tank (2).

[0028] In the utility model, preferably, the volume of the reaction tank (1) is 1-3L, for example, 2L.

[0029] In the utility model, preferably, the volume of the liquid storage tank (2) is 40-60L, for example, 50L. In the utility model, the volume of the liquid storage tank (2) can be flexibly regulated.

[0030] In the utility model, preferably, the liquid outlet (21) of the liquid storage tank is arranged on the side of the liquid storage tank (2) and is close to the bottom.

[0031] In the utility model, preferably, the material of the reaction tank (1) or the liquid storage tank (2) is selected from polypropylene (PP) or acrylic (PMMA).

[0032] In the utility model, preferably, the direct current power supply (4) is arranged outside the reaction tank (1); the positive pole of the direct current power supply (4) is connected with the anode plate (13), and the negative pole of the direct current power supply (4) is connected with the cathode plate (12).

[0033] The utility model has the positive progress effect that:

[0034] The utility model adopts the plate type anode and cathode, and simultaneously the reaction tank (1) and the liquid storage tank (2) constitute a circulating system, so that the stability of the electrolyte composition is ensured under the condition that the equipment is simple, and the organization performance of the copper foil can be accurately reflected. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 It is the structural schematic view of the electrolytic tank of example 1.

[0036] Mark explanation:

[0037] Reaction tank 1

[0038] Reaction tank liquid inlet 11

[0039] Cathode plate 12

[0040] Anode plate 13

[0041] First side plate 14

[0042] Second side plate 15

[0043] Liquid storage tank 2

[0044] Liquid storage tank liquid outlet 21

[0045] Liquid pump 3

[0046] Liquid pump liquid inlet 31

[0047] Liquid pump liquid outlet 32

[0048] DC power supply 4

[0049] First liquid tube 5

[0050] Second liquid tube 6

[0051] Base plate 7

[0052] Hole 71 Detailed Implementation

[0053] The present invention will be described more clearly and completely below with reference to the accompanying drawings, using a preferred embodiment.

[0054] Example 1 Electrolytic Cell

[0055] like Figure 1 As shown. The electrolytic cell includes a liquid tank, a liquid pump 3, and a DC power supply 4. The liquid tank includes an upper reaction tank 1 and a lower storage tank 2.

[0056] The reaction tank 1 is equipped with a cathode plate 12, an anode plate 13, a first side plate 14, and a second side plate 15. The bottom ends of the cathode plate 12, anode plate 13, first side plate 14, and second side plate 15 abut against the bottom plate 7 of the reaction tank 1. The cathode plate 12 and anode plate 13 are arranged in parallel, as are the first side plate 14 and second side plate 15. The first side plate 14 connects to one side of the cathode plate 12 and anode plate 13, and the second side plate 15 connects to the other side of the cathode plate 12 and anode plate 13. The cathode plate 12, anode plate 13, first side plate 14, and second side plate 15 form a reaction chamber.

[0057] The bottom of the reaction tank 1 is provided with a reaction tank inlet 11, which is located between the anode plate 13 and the cathode plate 12. The bottom of the storage tank 2 is provided with a storage tank outlet 21. The liquid pump 3 is provided with a liquid pump inlet 31 and a liquid pump outlet 32. The reaction tank inlet 11 and the liquid pump outlet 32 ​​are connected by a first liquid pipe 5, and the liquid pump inlet 31 and the storage tank outlet 21 are connected by a second liquid pipe 6. The reaction tank 1 and the storage tank 2 are separated by a bottom plate 7, and a hole 71 is provided on the bottom plate 7 on the outside of the reaction chamber.

[0058] The electrolyte in the storage tank 2 is pumped by the liquid pump 3 into the reaction chamber of the reaction tank 1. When the volume of the electrolyte exceeds the volume of the reaction chamber, the electrolyte overflows from above the first side plate 14 and the second side plate 15, and the overflowing electrolyte flows back into the storage tank 2 through the hole 71. Thus, the electrolyte in the reaction tank 1 and the storage tank 2 form a circulation system.

[0059] The material of the reaction tank 1, the liquid storage tank 2, the first side plate 14, the second side plate 15 and the bottom plate 7 is polypropylene (PP). The volume of the reaction tank 1 is 2L, and the volume of the liquid storage tank 2 is 50L. The cathode plate 12 is a titanium plate with a surface roughness Ra of 0.05 μm and a glossiness of 300GU, and the anode plate 13 is a titanium plate coated with iridium tantalum. The distance between the cathode plate 12 and the anode plate 13 is 100mm, and the size of each of them is 250mm×100mm×2mm in height×width×thickness. The effective area of the cathode plate 12 is 100mm×80mm in height×width, and the effective area of the anode plate 13 is 250mm×100mm in height×width. The size of each of the first side plate 14 and the second side plate 15 is 200mm×100mm×10mm in height×width×thickness.

[0060] The liquid pump 3 is an acid and alkali resistant magnetic pump with a flow parameter of 30L / min.

[0061] The direct current power supply 4 is arranged outside the reaction tank 1, and the parameters of the power supply are adjustable voltage 0-12V and adjustable current 0-200A. The positive electrode of the direct current power supply 4 is connected with the anode plate 13, and the negative electrode is connected with the cathode plate 12.

Claims

1. An electrolytic cell comprising a reaction tank (1) in which a cathode plate (12) and an anode plate (13) are provided, characterized in that, The cathode plate (12) and the anode plate (13) are oppositely arranged; the reaction tank (1) is provided with a reaction tank liquid inlet (11), the reaction tank liquid inlet (11) is located on the bottom plate (7) of the reaction tank (1), or is located on the side of the reaction tank (1) and is close to the bottom surface of the reaction tank (1); the reaction tank liquid inlet (11) is arranged between the cathode plate (12) and the anode plate (13). The electrolytic tank further comprises a liquid storage tank (2) and a liquid pump (3); the liquid storage tank (2) is provided with a liquid storage tank liquid outlet (21), and the liquid pump (3) is provided with a liquid pump liquid inlet (31) and a liquid pump liquid outlet (32); the reaction tank liquid inlet (11) and the liquid pump liquid outlet (32) are connected through a first liquid pipe (5), and the liquid pump liquid inlet (31) and the liquid storage tank liquid outlet (21) are connected through a second liquid pipe (6).

2. The electrolytic cell of claim 1, wherein, The electrolytic tank further comprises a first side plate (14) and a second side plate (15), the first side plate (14) and the second side plate (15) are oppositely arranged; one end side of the first side plate (14) is sealingly connected to the cathode plate (12) and the anode plate (13), and the other end side of the second side plate (15) is sealingly connected to the cathode plate (12) and the anode plate (13); the cathode plate (12), the anode plate (13), the first side plate (14) and the second side plate (15) form a reaction cavity with an open top end.

3. The electrolytic cell of claim 2, wherein, The first side plate (14) and the second side plate (15) are arranged in parallel relative to each other; And / or, the height of the first side plate (14) or the second side plate (15) is less than the height of the cathode plate (12) or the anode plate (13); And / or, the width of the first side plate (14) or the second side plate (15) is not less than the distance between the cathode plate (12) and the anode plate (13).

4. The electrolytic cell of claim 3, wherein, The size of the first side plate (14) or the second side plate (15) is height x width x thickness, which is 200mm x 100mm x 10mm.

5. The electrolytic cell of claim 2, wherein, The bottom ends of the cathode plate (12), the anode plate (13), the first side plate (14) and the second side plate (15) respectively abut against the bottom plate (7).

6. The electrolytic cell of claim 2, wherein, At least one through hole (71) is arranged on the bottom plate (7) outside the reaction cavity, for flowing the overflowed electrolyte back into the liquid storage tank (2); And / or, the reaction tank liquid inlet (11) is arranged on the bottom plate (7) and located inside the reaction cavity.

7. The electrolytic cell of claim 1, wherein, The cathode plate (12) and the anode plate (13) are arranged in parallel relative to each other; And / or, the distance between the cathode plate (12) and the anode plate (13) is 50-200mm; And / or, the surface roughness Ra of the cathode plate (12) is 0.03-0.08μm; And / or, the glossiness of the cathode plate (12) is 250-350GU; And / or, the size of the cathode plate (12) or the anode plate (13) is height x width x thickness, which is 250mm x 100mm x 2mm.

8. The electrolytic cell of claim 7, wherein, The effective area of the cathode plate (12) is 100mm*80mm in height*width.

9. The electrolytic cell of claim 1, wherein, The reaction tank (1) is located above the liquid storage tank (2), and the reaction tank (1) is adjacent to the liquid storage tank (2). And / or, the volume of the reaction tank (1) is 1-3L; And / or, the volume of the liquid storage tank (2) is 40-60L; And / or, the liquid outlet (21) of the liquid storage tank (2) is arranged on the side of the liquid storage tank (2) and is close to the bottom.

10. The electrolytic cell of claim 1, wherein, The direct current power supply (4) is arranged outside the reaction tank (1); the positive electrode of the direct current power supply (4) is connected with the anode plate (13), and the negative electrode of the direct current power supply (4) is connected with the cathode plate (12).

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