Small experimental equipment for preparing electrolytic copper foil for lithium ion battery

Abstract

The utility model discloses small experimental equipment for preparing electrolytic copper foil for a lithium ion battery, relates to the technical field of copper foil preparation experimental equipment, and solves the technical problem that the produced copper foil cannot be subjected to anti-oxidation treatment. Comprising a liquid storage barrel, and an L-shaped heating rod is arranged in the liquid storage barrel; the electrolytic bath is connected with the liquid storage barrel, and a first anode plate is arranged in the electrolytic bath; the electroplating bath is connected with the electrolytic bath, and a second anode plate is arranged in the electroplating bath; the electric control box is electrically connected with the heating rod and is electrically connected with the rectifier; the electroplating bath is used for solving the problem that the copper foil prepared by the existing electrolytic copper foil test equipment is easy to oxidize, the research test requirements on the anti-oxidation process of the copper foil are met, the temperature of the electrolyte is uniform, controllable and stable due to the arrangement of the heating rod, the stability and reliability of electrolyte parameters in the test process are improved, and the service life of the electrolyte is prolonged. And the consistency and repeatability of test samples are ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of copper foil preparation test equipment, in particular to a small-scale experimental equipment for preparing electrolytic copper foil for lithium ion batteries. Background Art

[0002] In the manufacture of lithium-ion batteries, electrolytic copper foil, a key material for the battery's negative electrode, has a quality that directly impacts the battery's electrochemical performance, cycle life, and safety. The preparation process for electrolytic copper foil includes copper dissolution, foil production, surface treatment, and slitting and packaging, with the first three steps being crucial for determining foil quality. To optimize the performance of electrolytic copper foil, researchers need to thoroughly explore the effects of different additive systems and electrolysis parameters on the foil's properties. Therefore, designing a scientifically sound, fully functional experimental setup is crucial to achieving this goal.

[0003] For example, Chinese Patent Authorization Publication No. CN214496508U discloses an electrolytic copper foil testing device for lithium-ion batteries, comprising: a low-level tank, an upper-level tank, an electrolytic cell, a ball valve, and a filter. The upper-level tank is connected to the lower-level tank, the filter is connected between the lower-level tank and the upper-level tank, the electrolytic cell is connected to the upper-level tank, the ball valve is connected between the upper-level tank and the bottom of the electrolytic cell, and a cathode roller is adapted to fit within the electrolytic cell. This utility model not only allows for studying the effects of flow rate on copper foil properties but also allows for the adsorption of additives, allowing for repeated experiments and improving experimental efficiency. Another example is Chinese Patent Authorization Publication No. CN209276654U, which discloses an electrolytic copper foil testing device. The device primarily consists of an electrolytic cell, a liquid storage tank, and a power supply. The electrolytic cell is equipped with electrode plates and connected to the power supply via a cable. The liquid supply port of the liquid storage tank is connected to the electrolyte inlet of the electrolytic cell via a liquid supply pipeline, which is equipped with an inlet valve and an anti-corrosion pump to ensure accurate electrolyte supply. Specifically, the liquid supply line from the anti-corrosion pump to the electrolyte inlet of the electrolytic cell is connected to the return port of the liquid storage tank via a flow control line. This flow control line is equipped with a bypass valve to regulate the circulation and flow of the electrolyte. Furthermore, the electrolyte circulation outlet of the electrolytic cell is connected to the electrolyte circulation inlet of the liquid storage tank via a return line, forming a closed circulation system. This structural design enables precise control of the electrolyte feed rate, ensuring uniform circulation of the electrolyte throughout the experiment, thereby simulating actual production conditions.

[0004] While the aforementioned utility model has improved the efficiency and reliability of electrolytic copper foil experiments to a certain extent, there is still room for improvement in simulating real-world production conditions. Specifically, the difficulty in achieving real-time monitoring and precise adjustment of electrolyte parameters, as well as the inability to perform anti-oxidation treatment on the produced copper foil, severely impact the efficiency and reliability of the experiments. Therefore, there is an urgent need for a more comprehensive electrolytic copper foil experimental device that can fully simulate an industrial production environment, address the shortcomings of existing experimental equipment, and promote the further development of electrolytic copper foil preparation technology. Utility Model Content

[0005] The utility model aims to solve at least one of the technical problems existing in the prior art; to this end, the utility model provides a small experimental device for preparing electrolytic copper foil for lithium ion batteries.

[0006] A small experimental device for preparing electrolytic copper foil for lithium-ion batteries, comprising:

[0007] A liquid storage barrel, wherein an L-shaped heating rod is provided inside the liquid storage barrel;

[0008] an electrolytic cell connected to the liquid storage tank, wherein a first anode plate is provided inside the electrolytic cell;

[0009] an electroplating tank connected to the electrolytic tank, wherein a second anode plate is provided inside the electroplating tank;

[0010] An electric control box is electrically connected to the heating rod, and the electric control box is electrically connected to the rectifier.

[0011] Preferably, the head end of the heating rod extends from the top of the liquid storage barrel and is connected to the electric control box through a cable.

[0012] Preferably, the liquid supply port of the liquid storage barrel is connected to the liquid inlet at the lower end of the side of the electrolytic cell through a liquid supply pipe, and the liquid supply pipe is sequentially provided with an anti-corrosion pump, a liquid inlet valve and an activated carbon filter tank along the direction of electrolyte flow.

[0013] Preferably, the liquid supply pipe is connected to the top of the liquid storage barrel, and a bypass valve is provided on the liquid separation pipeline between the two.

[0014] Preferably, the electrolyte circulation outlet of the electrolytic cell is connected to the electrolyte circulation inlet of the liquid storage barrel through a pipeline.

[0015] Preferably, the electrolytic cell, electroplating cell and rectifier are all arranged on a supporting platform, and the electric control box is independently arranged on the wall.

[0016] Preferably, the liquid storage barrel is a cylindrical barrel structure consisting of an upper cover plate, an inner plate and a bottom plate, the upper cover plate is provided with a detachable half-moon cover plate, and the inner plate is provided with scale lines.

[0017] Preferably, the electrolytic cell is a shell structure with a cavity formed by a first side plate and a first bottom plate, and the cavity includes a liquid inlet chamber, a pole plate fixing groove and an overflow groove. The inner wall of the liquid inlet chamber is provided with a vertical downward slide groove, the inner wall of the pole plate fixing groove is provided with a card groove, and the overflow groove is arranged on the outer periphery of the upper side of the liquid inlet chamber.

[0018] Preferably, the electroplating tank is a shell structure with two cavities consisting of a second side plate, a middle partition plate and a second bottom plate. The left cavity is a pickling chamber, and the right cavity is an anti-oxidation tank chamber. The inner wall of the anti-oxidation tank chamber is provided with a vertical downward slide groove.

[0019] Preferably, a stirring device is provided on the top of the liquid storage barrel, a stirring rod is connected below the stirring device, and a stirring blade is provided at the end of the stirring rod.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] (1) The utility model uses an electroplating tank to solve the problem that the copper foil prepared by the existing electrolytic copper foil testing equipment is easy to oxidize, and also meets the research and testing needs of the copper foil anti-oxidation process. The setting of the heating rod makes the temperature of the electrolyte uniform, controllable and stable, improves the stability and reliability of the electrolyte parameters during the test, and ensures the consistency and repeatability of the test samples. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of the copper foil preparation experimental equipment of the utility model;

[0023] Figure 2 For this utility model Figure 1 Schematic diagram of the structure of the electrolytic cell;

[0024] Figure 3 For this utility model Figure 1 Schematic diagram of the structure of the electroplating tank;

[0025] In the figure: 1. Liquid storage tank; 2. Stirring motor; 3. Heating rod; 4. Anti-corrosion pump; 5. Activated carbon filter tank; 6. Flow meter; 7. Electrolytic cell; 8. Electroplating cell; 9. Rectifier; 10. Electric control box; 11. Cable; 12. Butterfly valve; 13. Support platform; 14. Base; 15. First anode plate; 16. Titanium alloy plate; 17. Plate fixing groove; 18. Liquid supply pipe; 19. Liquid inlet chamber; 20. Overflow tank; 21. Pickling chamber; 22. Anti-oxidation tank chamber; 23. Second anode plate; 24. Circulation pump; 25. Return pipe. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] Example 1

[0028] See also Figure 1 - Figure 3 The present application provides a small experimental device for preparing electrolytic copper foil for lithium-ion batteries, comprising:

[0029] A liquid storage barrel 1, an L-shaped heating rod 3 is provided inside the liquid storage barrel 1, and a butterfly valve 12 is provided on the liquid discharge pipe provided at the bottom of the liquid storage barrel 1;

[0030] An electrolytic cell 7 connected to the liquid storage tank 1, wherein a first anode plate 15 is provided inside the electrolytic cell 7, and a titanium alloy plate 16 is further provided inside the electrolytic cell 7, and the first anode plate 15 is connected to the rectifier 9 via a cable 11;

[0031] An electroplating tank 8 connected to the electrolytic tank 7, wherein a second anode plate 23 is provided inside the electroplating tank 8, and the second anode plate 23 is connected to the rectifier 9 via a cable 11;

[0032] The electric control box 10 is electrically connected to the heating rod 3 , and the electric control box 10 is electrically connected to the rectifier 9 .

[0033] In this embodiment, preferably, the head end of the heating rod 3 extends from the top of the liquid storage barrel 1 and is connected to the electric control box 10 through the cable 11. After power is turned on, the heating rod 3 can monitor the electrolyte temperature in real time, and convert it into a numerical value through the PLC controller and display it in real time on the display screen of the electric control box 10. The heating rod 3 can also heat up according to the set temperature, thereby heating the electrolyte temperature to the specified temperature.

[0034] In this embodiment, preferably, the liquid supply port of the liquid storage barrel 1 is connected to the liquid inlet at the lower end of the side of the electrolytic cell 7 through a liquid supply pipe 18. The pipeline of the liquid supply pipe 18 entering the inside of the electrolytic cell 7 is provided with multiple spray holes. The liquid supply pipe 18 is provided with an anti-corrosion pump 4, a liquid inlet valve and an activated carbon filter tank 5 in sequence along the direction of the electrolyte flow. The activated carbon filter tank 5 filters the electrolyte.

[0035] In summary, the drain pipe at the bottom of the electrolytic cell 7 is connected to the liquid inlet pipeline on the right side of the anti-corrosion pump 4 through a hose. The liquid inlet valve and the bypass valve of the liquid separation pipeline are opened, and the valve on the liquid outlet pipeline on the lower side of the liquid storage barrel 1 and the valve on the liquid supply pipe 18 between the anti-corrosion pump 4 and the activated carbon filter tank 5 are closed respectively. A pipeline for the electrolyte to flow from the electrolytic cell 7 to the liquid storage barrel 1 in one direction can be formed. After the test is completed, all the electrolyte can be conveniently collected in the liquid storage barrel 1.

[0036] In this embodiment, preferably, the liquid storage barrel 1 is a cylindrical barrel structure consisting of an upper cover plate, an inner plate and a bottom plate. A detachable half-moon cover plate is provided on the upper cover plate, and scale lines are provided on the inner plate to mark the depth of the electrolyte.

[0037] In this embodiment, preferably, the electrolytic cell 7 is a shell structure with a cavity formed by a first side plate and a first bottom plate, and the cavity includes a liquid inlet chamber 19, a plate fixing groove 17 and an overflow groove 20. The inner wall of the liquid inlet chamber 19 is provided with a vertical downward slide groove, and the inner wall of the plate fixing groove 17 is provided with a card groove for installing the plate, and the overflow groove 20 is arranged on the outer periphery of the upper side of the liquid inlet chamber 19.

[0038] In this embodiment, preferably, the electroplating tank 8 is a shell structure with two cavities composed of a second side plate, a middle partition plate and a second bottom plate. The left cavity is a pickling chamber 21, and the right cavity is an anti-oxidation tank chamber 22. The inner wall of the anti-oxidation tank chamber 22 is provided with a vertical downward slide groove for inserting the electrode fixing groove 17.

[0039] In this embodiment, preferably, a stirring motor 2 is provided on the top of the liquid storage barrel 1, a stirring rod is connected to the bottom of the stirring motor 2, and a stirring blade is provided at the end of the stirring rod. The stirring motor 2 is connected to the electrical control box 10 through a cable 11. When powered on, it drives the stirring rod and the stirring blade to rotate, and is converted into a numerical value by the PLC controller and displayed in real time on the display screen of the electrical control box 10.

[0040] In this embodiment, preferably, the electrolytic copper foil experimental equipment further includes a flow meter 6 , which is arranged at any position from the activated carbon filter tank 5 to the liquid inlet of the electrolytic cell 7 .

[0041] In this embodiment, preferably, the liquid supply pipe 18 is connected to the top of the liquid storage barrel 1, and a bypass valve is provided on the liquid separation pipeline between the two.

[0042] In summary, the setting of the liquid supply pipe 18 and the liquid storage barrel 1 liquid separation pipeline forms a closed self-circulation system. When the copper ion concentration of the electrolyte is too low, thin copper wire can be added to the liquid storage barrel 1, and the electrolyte is sprayed down from the top of the liquid storage barrel 1 through the liquid separation pipeline, which truly simulates the copper dissolving process in actual production and provides more operability for the experiment.

[0043] In this embodiment, preferably, the electrolyte circulation outlet of the electrolytic cell 7 is connected to the electrolyte circulation inlet of the liquid storage barrel 1 through a pipeline to facilitate electrolyte circulation.

[0044] In this embodiment, preferably, the electrolytic cell 7, the electroplating cell 8 and the rectifier 9 are all arranged on the supporting platform 13, and the electric control box 10 is independently arranged on the wall.

[0045] In this embodiment, preferably, drainage pipelines are provided at the bottom of the electrolytic tank 7 and the electroplating tank 8, and drainage valves are provided on the drainage pipelines.

[0046] In this embodiment, preferably, the lower side and the upper side of the electroplating tank 8 are connected through a return pipe 25 , and a circulation pump 24 is provided on the return pipe 25 .

[0047] In this embodiment, preferably, a base 14 is provided under the liquid storage barrel 1, the anti-corrosion pump 4 and the support platform 13, a universal wheel is provided under the base 14, the anti-corrosion pump 4 is a horizontal centrifugal pump made of stainless steel, and the current provided by the rectifier 9 is direct current.

[0048] In summary, the drain pipe at the bottom of the electrolytic cell 7 is connected to the liquid inlet pipe on the right side of the anti-corrosion pump 4 through a hose. The liquid inlet valve and the valve on the liquid supply pipe 18 between the anti-corrosion pump 4 and the activated carbon filter tank 5 are opened, and the valve on the liquid outlet pipe on the lower side of the liquid storage barrel 1 and the bypass valve of the liquid separation pipe are closed respectively, so as to form a self-circulating system of the electrolytic cell 7. After the test is completed, clean water is injected into the electrolytic cell 7, and the anti-corrosion pump 4 is turned on to clean the pump body, the activated carbon filter tank 5, and the liquid supply pipe 18. After completion, the anti-corrosion pump 4 is turned off, and the hose between the drain pipe at the bottom of the electrolytic cell 7 and the liquid inlet pipe on the right side of the anti-corrosion pump 4 is disconnected, and the sewage is discharged through the drain pipe at the bottom of the electrolytic cell 7, which solves the problem that similar electrolytic copper foil test equipment is difficult to clean or the cleaning effect is poor after the experiment is completed.

[0049] Example 2

[0050] See also Figure 1 - Figure 3 When in use, the electrolyte is injected into the liquid storage barrel 1 through the anti-corrosion pump 4, and the electrolyte in the liquid storage barrel 1 enters the electrolytic cell 7 through two activated carbon filter tanks 5. The titanium alloy plate 16 is inserted into the electrolytic cell 7 and powered on. In conjunction with the first anode plate 15, a layer of copper foil will be formed on the surface of the titanium alloy plate 16. The titanium alloy plate 16 with copper foil is taken out and placed in the electroplating tank 8 for power treatment, forming an anti-oxidation film on the surface of the copper foil, thereby solving the problem that the copper foil prepared by the existing electrolytic copper foil testing equipment is easy to oxidize.

[0051] The above embodiments are only used to illustrate the technical method of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical method of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the present invention.

Claims

1. A small experimental device for preparing electrolytic copper foil for lithium ion batteries, characterized in that: include: A liquid storage barrel (1), wherein an L-shaped heating rod (3) is provided inside the liquid storage barrel (1); an electrolytic cell (7) connected to the liquid storage barrel (1), wherein a first anode plate (15) is provided inside the electrolytic cell (7); an electroplating tank (8) connected to the electrolytic tank (7), wherein a second anode plate (23) is provided inside the electroplating tank (8); An electric control box (10) is electrically connected to the heating rod (3), and the electric control box (10) is electrically connected to the rectifier (9).

2. A small-scale experimental device for preparing electrolytic copper foil for lithium-ion batteries according to claim 1, characterized in that: The head end of the heating rod (3) extends from the top of the liquid storage barrel (1) and is connected to the electric control box (10) via a cable (11).

3. A small-scale experimental device for preparing electrolytic copper foil for lithium-ion batteries according to claim 1, characterized in that: The liquid supply port of the liquid storage barrel (1) is connected to the liquid inlet at the lower end of the side of the electrolytic cell (7) through a liquid supply pipe (18), and an anti-corrosion pump (4), a liquid inlet valve and an activated carbon filter tank (5) are sequentially arranged on the liquid supply pipe (18) along the direction of electrolyte flow.

4. A small-scale experimental device for preparing electrolytic copper foil for lithium-ion batteries according to claim 3, characterized in that: The liquid supply pipe (18) is connected to the top of the liquid storage barrel (1), and a bypass valve is provided on the liquid separation pipeline between the two.

5. The small-scale experimental equipment for preparing electrolytic copper foil for lithium-ion batteries according to claim 1, characterized in that: The electrolyte circulation outlet of the electrolytic cell (7) is connected to the electrolyte circulation inlet of the liquid storage barrel (1) through a pipeline.

6. The small-scale experimental equipment for preparing electrolytic copper foil for lithium-ion batteries according to claim 1, characterized in that: The electrolytic cell (7), electroplating cell (8) and rectifier (9) are all arranged on a supporting platform (13), and the electric control box (10) is independently arranged on a wall.

7. The small-scale experimental equipment for preparing electrolytic copper foil for lithium-ion batteries according to claim 1, characterized in that: The liquid storage barrel (1) is a cylindrical barrel structure consisting of an upper cover plate, an inner side plate and a bottom plate; a detachable half-moon cover plate is provided on the upper cover plate, and scale lines are provided on the inner side plate.

8. The small-scale experimental equipment for preparing electrolytic copper foil for lithium-ion batteries according to claim 1, characterized in that: The electrolytic cell (7) is a shell structure with a cavity formed by a first side plate and a first bottom plate. The cavity includes a liquid inlet chamber (19), a plate fixing groove (17) and an overflow groove (20). The inner wall of the liquid inlet chamber (19) is provided with a vertical downward sliding groove, the inner wall of the plate fixing groove (17) is provided with a clamping groove, and the overflow groove (20) is arranged on the outer periphery of the upper side of the liquid inlet chamber (19).

9. The small-scale experimental equipment for preparing electrolytic copper foil for lithium-ion batteries according to claim 1, characterized in that: The electroplating tank (8) is a shell structure with two cavities consisting of a second side plate, a middle partition plate and a second bottom plate. The left cavity is a pickling chamber (21) and the right cavity is an anti-oxidation tank chamber (22). The inner wall of the anti-oxidation tank chamber (22) is provided with a vertical downward sliding groove.

10. The small-scale experimental equipment for preparing electrolytic copper foil for lithium-ion batteries according to claim 1, characterized in that: A stirring motor (2) is provided on the top of the liquid storage barrel (1), a stirring rod is connected below the stirring motor (2), and a stirring blade is provided at the end of the stirring rod.

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