Galvanic cell preparation device

Abstract

The utility model discloses a primary battery preparation device which comprises two electrodes, two electrolyte containers, two hollow pipes and a salt bridge, electrolyte solution is contained in the electrolyte containers, hooks are arranged on the side walls of the hollow pipes, the side walls of the electrolyte containers are detachably connected with the hooks, and the salt bridge is arranged on the hollow pipes. An electrode mounting tube is mounted in the hollow tube in a sliding manner; and the salt bridge comprises a three-way glass tube, a semi-permeable membrane and a silicone tube. The device has the beneficial effects that the treated electrode is placed in the closed space formed by the electrode mounting tube and the hollow tube, the electrode is protected by inert gas, the electrode is prevented from being oxidized by air after an experiment is finished, the electrode can be subjected to a next experiment without being subjected to surface treatment, and the experiment efficiency is improved. Meanwhile, the semi-permeable membrane is fixed to the lower pipe opening of the three-way glass pipe through the silica gel pipe and serves as a salt bridge medium, a semi-permeable membrane salt bridge is convenient to add filling liquid and does not deteriorate, and the semi-permeable membrane is very convenient to replace.

Description

Technical Field

[0001] The utility model relates to the technical field of analytical chemistry and electrochemical instruments, in particular to a primary battery preparation device. Background Art

[0002] In the experiment of measuring the electromotive force of a primary cell, the preparation device of the primary cell often appears. Before the experiment, the electrode needs to be processed to remove the surface oxide to avoid the potential deviation and instability caused by electrode factors. Usually the electrode can be used many times, but the surface treatment must be carried out before each use. The processing process is cumbersome and the initial processing time is too long.

[0003] The salt bridges in the preparation device of the primary cell are mostly agar salt bridges and bisque-fired porcelain salt bridges. The potential deviation measured by the agar salt bridge is large and the salt bridge is prone to deterioration and failure. The bisque-fired porcelain salt bridge is almost inconvenient to replace the dielectric material due to the fixing method of the device. If it is stained with hydrophobic substances such as grease during use, it is very easy to cause poor conductivity of the salt bridge, thereby causing the primary cell circuit to be short. Utility Model Content

[0004] In view of the above-mentioned prior art, the utility model provides a primary battery preparation device to solve the problems existing in the above-mentioned background technology.

[0005] To achieve the above purpose, the technical solution of the embodiment of the utility model is implemented as follows:

[0006] A primary battery preparation device comprises two electrodes, two electrolyte containers, two hollow tubes and a salt bridge, wherein the electrolyte container contains an electrolyte solution, a hook is provided on the side wall of the hollow tube, and the side wall of the electrolyte container is detachably connected to the hook, an electrode mounting tube is slidably installed in the hollow tube, a terminal post, an air inlet pipe and an exhaust pipe are provided at the top of the electrode mounting tube, a limit plate is provided on the outer wall of the electrode mounting tube, the electrode is fixedly installed in the electrode mounting tube through the terminal post, the air pipe is connected to a gas tank filled with inert gas, an air inlet valve is provided on the air inlet pipe, an exhaust valve is provided on the exhaust pipe, two opposite through holes are provided at the bottom of the side wall of the electrode mounting tube, the length of the electrode mounting tube is greater than that of the hollow tube, and the salt bridge comprises a three-way glass tube, a semipermeable membrane and a silicone tube, and the semipermeable membrane is fixedly installed at the bottom pipe opening of the three-way glass tube through the silicone tube.

[0007] Preferably, the inner diameter of the silicone tube is slightly smaller than the outer diameter of the bottom tube opening of the three-way glass tube.

[0008] Preferably, it further includes a bottom plate and a support plate. A card slot is provided on the bottom plate, and the inner diameter of the card slot is equal to the outer diameter of the electrolyte container. The support plate is fixedly connected to the bottom plate and perpendicular to each other. A support frame is provided on the support plate, and the support frame is fixedly connected to the three-way glass tube by clamping.

[0009] Preferably, the electrode mounting tube and the hollow tube have a rectangular cross-section.

[0010] Preferably, the through hole is rectangular, and its bottom edge is connected to the bottom plate of the electrode mounting tube.

[0011] Preferably, a handle is provided at the top of the electrode mounting tube.

[0012] Preferably, the electrode mounting tube includes a tube body and an upper cover. An opening is provided at the top of the tube body, and the upper cover is detachably connected to the opening.

[0013] The beneficial effects of the present invention are as follows: The processed electrode is placed in the closed space formed by the electrode mounting tube and the hollow tube, and the electrode is protected by inert gas to prevent the electrode from being oxidized by air after the experiment. The electrode can be used in the next experiment without surface treatment. At the same time, a silica gel tube is used to fix the semi-permeable membrane at the lower nozzle of the three-way glass tube to act as a salt bridge medium. The semi-permeable membrane salt bridge is convenient for adding filling liquid and will not deteriorate, and it is very convenient to replace the semi-permeable membrane. Description of the Drawings

[0014] Figure 1 is a schematic structural diagram of a primary battery preparation device in an embodiment of the present application;

[0015] Figure 2 is Figure 1 an enlarged schematic diagram of part A in

[0016] Figure 3 is Figure 1 an enlarged schematic diagram of part B in

[0017] Figure 4 is a schematic structural diagram of the electrode mounting tube in Embodiment 2 of the present application;

[0018] Explanation of the Reference Numerals in the Drawings:

[0019] 1. Electrode; 2. Electrolyte container; 3. Hollow tube; 4. Salt bridge; 401. Three-way glass tube; 402. Semi-permeable membrane; 403. Silica gel tube; 5. Hook; 6. Electrode mounting tube; 601. Tube body; 602. Upper cover; 7. Terminal; 8. Air pipe; 9. Gas tank; 10. Through hole; 11. Bottom plate; 12. Support plate; 13. Card slot; 14. Support frame; 15. Handle; 16. Limiting plate; 17. Intake valve; 18. Exhaust valve; 19. Exhaust pipe. Detailed Embodiments

[0020] The technical solution of the present utility model will be further elaborated in detail below in conjunction with the accompanying drawings of the specification and specific embodiments. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the specification of the present utility model herein are only for the purpose of describing specific embodiments, and are not intended to limit the present utility model. In the following description, the expression "some embodiments" describes a subset of all possible embodiments. However, it should be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments, and can be combined with each other without conflict.

[0021] It should be further noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "inner", "outer", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.

[0022] Embodiment 1

[0023] Please refer to Figures 1-3 This application provides a primary battery preparation device, including two electrodes 1, two electrolyte containers 2, two hollow tubes 3 and a salt bridge 4. The electrolyte containers 2 are filled with electrolyte solutions. Hooks 5 are provided on the side walls of the hollow tubes 3, and the side walls of the electrolyte containers 2 are detachably connected to the hooks 5. An electrode mounting tube 6 is slidably installed in the hollow tube 3. A terminal 7, an air inlet pipe 8 and an exhaust pipe 18 are provided at the top of the electrode mounting tube 6. A limiting plate 16 is provided on the outer wall of the electrode mounting tube 6. The electrode 1 is fixedly installed in the electrode mounting tube 6 through the terminal 7. The air inlet pipe 8 is communicated with a gas tank 9 filled with inert gas. An air inlet valve 17 is provided on the air inlet pipe 8, and an exhaust valve 18 is provided on the exhaust pipe 19. Two opposite through holes 10 are provided at the bottom of the side wall of the electrode mounting tube 6. The length of the electrode mounting tube 6 is greater than the length of the hollow tube 3. The salt bridge 4 includes a three-way glass tube 401, a semi-permeable membrane 402 and a silica gel tube 403. The semi-permeable membrane 402 is fixedly installed at the bottom pipe orifice of the three-way glass tube 401 through the silica gel tube 403.

[0024] Before the experiment starts, the intake valve 17 and the exhaust valve 18 are in the closed state. The electrode 1 after surface treatment is fixedly installed in the electrode installation tube 6 through the terminal 7. Open the intake valve 17 on the intake pipe 8, and introduce the inert gas in the gas tank 9 into the electrode installation tube 6 through the intake pipe 8 to prevent the electrode 1 from being oxidized. Subsequently, insert the electrode installation tube 6 into the hollow tube 3 to form a sealed space, and close the intake valve 17 to prevent the leakage of inert gas and isolate the electrode 1 at the same time. Inject the electrolyte solution into the electrolyte container 2, fix the hollow tube 3 on the side wall of the electrolyte container 2 through the hook 5, press the electrode installation tube 6 to expose the through hole 10 at the bottom of the side wall of the electrode installation tube 6 in the electrolyte solution, and slowly open the exhaust valve 18 on the exhaust pipe 19 to discharge the inert gas in the electrode installation tube 6, thereby adjusting the liquid level height of the electrolyte solution in the electrode installation tube 6 to make the electrolyte solution contact the electrode 1, ensuring that the electrode 1 will not contact air and be oxidized before contacting the electrolyte solution, which affects the measurement of the electromotive force. After adjusting the liquid level height of the electrolyte solution in the electrode installation tube 6, close the exhaust valve 18 to prevent air from entering and oxidizing the electrode 1. The limiting plate 16 on the outer wall of the electrode installation tube 6 serves to ensure that the electrode installation tube 6 can be fixed in the hollow tube 3 and will not slip out of the hollow tube 3, and at the same time ensure that the through hole 10 is completely exposed in the electrolyte solution, enabling the electrode 1 to contact the electrolyte solution and facilitating the smooth progress of subsequent experiments. Drop the saturated salt bridge 4 solution into the three-way glass tube 401 through a dropper until the liquid level of the salt bridge 4 solution exceeds the three-way junction to form the salt bridge 4. The semi-permeable membrane 402 at the bottom nozzle of the three-way glass tube 401 allows ions to diffuse unidirectionally from the saturated salt bridge 4 solution to the electrolyte solution. At the same time, since the migration rates of positive and negative ions in the salt bridge 4 solution are approximately equal, the potential difference generated at the contact surface between the salt bridge 4 and the electrolyte solution is very small, and the potential differences generated between the two electrolyte solutions and the salt bridge 4 cancel each other out. Thus, while the salt bridge 4 with the semi-permeable membrane 402 conducts electricity stably, it also has the function of reducing the liquid junction potential. The silica gel tube 403 serves to fix the semi-permeable membrane 402 at the bottom nozzle of the three-way glass tube 401, with good sealing and convenient replacement of the semi-permeable membrane 402, and the operation is convenient. Insert the two bottom nozzles of the three-way glass tube 401 filled with the saturated salt bridge 4 solution into the two electrolyte containers 2 containing the electrolyte solution respectively to ensure the connection between the saturated salt bridge 4 solution and the electrolyte solution. Finally, connect the digital potential difference comprehensive tester to the two terminals 7 to measure the electromotive force of the experimental device. After the experiment ends, lift the electrode installation tube 6 upward until the through hole 10 fits against the inner side wall of the hollow tube 3, and at the same time all the electrolyte solution leaks out of the electrode installation tube 6 to prevent the electrode 1 from being oxidized by air after the experiment ends. The electrode 1 can be reused multiple times without surface treatment.

[0025] Further, the inner diameter of the silica gel tube 403 is slightly smaller than the outer diameter of the bottom nozzle of the three-way glass tube 401. The inner diameter of the silica gel tube 403 is designed to be smaller than the outer diameter of the bottom nozzle of the three-way glass tube 401, so as to better wrap the semi-permeable membrane 402 on the side of the bottom nozzle of the three-way glass tube 401 by using the elasticity of the silica gel tube 403. While having good sealing performance, it is convenient to replace the semi-permeable membrane 402, and the operation is convenient.

[0026] Further, it further includes a bottom plate 11 and a support plate 12. A card slot 13 is provided on the bottom plate 11, and the inner diameter of the card slot 13 is equal to the outer diameter of the electrolyte container 2. The support plate 12 is fixedly connected to the bottom plate 11 and is perpendicular to each other. A support frame 14 is provided on the support plate 12, and the support frame 14 is fixedly connected to the three-way glass tube 401 by clamping. Placing the electrolyte container 2 in the card slot 13 on the bottom plate 11 plays a good fixing role, and the support frame 14 on the support plate 12 can fix the three-way glass tube 401, facilitating the salt bridge 4 to be stably suspended above the electrolyte container 2 and communicate with the electrolyte solution.

[0027] Further, the cross-sections of the electrode installation tube 6 and the hollow tube 3 are rectangular. The cross-section of the electrode installation tube 6 is rectangular, which is convenient for opening through holes 10 on the side wall. For the hollow tube 3 to be slidably connected to the electrode installation tube 6, the cross-section of the hollow tube 3 is also designed to be rectangular.

[0028] Further, the through hole 10 is rectangular, and its bottom edge is connected to the bottom plate 11 of the electrode installation tube 6. A rectangular through hole 10 is opened at the bottom of the side wall of the electrode installation tube 6, and the bottom edge is connected to the bottom plate 11 of the electrode installation tube 6, ensuring that the electrolyte solution can completely leak out from the electrode installation tube 6.

[0029] Embodiment 2

[0030] Please refer to Figures 1-4 In this embodiment, the difference from Embodiment 1 is that a handle 15 is provided at the top of the electrode installation tube 6. The handle 15 at the top of the electrode installation tube 6 facilitates the experimenter to move the electrode installation tube 6 up and down, control the height of the electrode installation tube 6, and control the entry or leakage of the electrolyte solution into or out of the electrode installation tube 6.

[0031] Further, the electrode installation tube 6 includes a tube body 601 and an upper cover 602. An opening is provided at the top of the tube body 601, and the upper cover 602 is detachably connected to the opening. The electrode installation tube 6 is designed with a structure of a tube body 601 and an upper cover 602. After the experiment, the upper cover 602 can be opened to rinse the electrode 1 and the inside of the electrode installation tube 6, avoiding the influence of the residual solution on the results of the next experiment.

[0032] The above are only the specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model can easily conceive of changes or substitutions, which should all be covered within the protection scope of the present utility model. The protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims

1. A primary battery preparation device, characterized in that, It includes two electrodes, two electrolyte containers, two hollow tubes and a salt bridge. The electrolyte containers are filled with electrolyte solutions. Hooks are provided on the side walls of the hollow tubes, and the side walls of the electrolyte containers are detachably connected to the hooks. An electrode mounting tube is slidably installed inside the hollow tube. A terminal post, an air inlet pipe and an exhaust pipe are provided at the top of the electrode mounting tube. A limiting plate is provided on the outer wall of the electrode mounting tube. The electrode is fixedly installed inside the electrode mounting tube through the terminal post. The air inlet pipe is communicated with a gas tank filled with inert gas. An air inlet valve is provided on the air inlet pipe, and an exhaust valve is provided on the exhaust pipe. Two opposite through holes are provided at the bottom of the side wall of the electrode mounting tube. The length of the electrode mounting tube is greater than the length of the hollow tube. The salt bridge includes a three-way glass tube, a semipermeable membrane and a silica gel tube. The semipermeable membrane is fixedly installed at the bottom nozzle of the three-way glass tube through the silica gel tube.

2. The primary battery preparation device according to claim 1, wherein The inner diameter of the silica gel tube is slightly smaller than the outer diameter of the bottom nozzle of the three-way glass tube.

3. The primary battery preparation device according to claim 1, characterized in that, It further includes a bottom plate and a support plate. A clamping groove is provided on the bottom plate, and the inner diameter of the clamping groove is equal to the outer diameter of the electrolyte container. The support plate is fixedly connected to the bottom plate and perpendicular to each other. A support frame is provided on the support plate, and the support frame is fixedly connected to the three-way glass tube by clamping.

4. A primary battery preparation device according to claim 1, characterized in that, The cross sections of the electrode mounting tube and the hollow tube are rectangular.

5. A primary battery preparation device according to claim 1, characterized in that, The through hole is rectangular, and its bottom edge is connected to the bottom plate of the electrode mounting tube.

6. The primary battery preparation device according to claim 1, wherein, A handle is provided at the top of the electrode mounting tube.

7. A primary battery preparation device according to claim 1, characterized in that, The electrode mounting tube includes a tube body and an upper cover. An opening is provided at the top of the tube body, and the upper cover is detachably connected to the opening.

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