Cover structure for taking electrolyte, closed bottle and electrolyte barrel

Abstract

The utility model provides a cover structure for taking electrolyte, a closed bottle and an electrolyte barrel, the cover structure comprises a cover body, a liquid inlet pipe and an exhaust pipe are inserted on the cover body, and the outer walls of the liquid inlet pipe and the exhaust pipe are sealed with the cover body; the liquid inlet pipe comprises a first liquid inlet pipe, a second liquid inlet pipe and a third liquid inlet pipe which are sequentially connected, one end of the first liquid inlet pipe penetrates through the cover body, the other end of the first liquid inlet pipe is bent, so that the second liquid inlet pipe is arranged downwards, and a first sealing ball is movably arranged in the second liquid inlet pipe; the volume of the first sealing ball is larger than that of a connecting port between the second liquid inlet pipe and the third liquid inlet pipe, so that the first sealing ball can seal the connecting port under the action of gravity; the diameter of the exhaust pipe is gradually increased from bottom to top, a second sealing ball is movably arranged in the exhaust pipe, and the second sealing ball can seal the exhaust pipe under the action of gravity. According to the utility model, the influence of moisture in environment humidity can be eliminated without manually controlling the opening and closing of the valve, and the operation convenience is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrolyte extraction, in particular to a cap structure for electrolyte extraction, a closed bottle and an electrolyte barrel. Background Art

[0002] At present, commercial electrolytes contain lithium hexafluorophosphate and organic carbonate solvents, which have good electrochemical stability. However, lithium hexafluorophosphate has poor hydrolysis stability, which limits its application fields. During the liquid injection process of existing soft-pack batteries, the environmental requirements are relatively high, and the liquid injection volume is less than that of square batteries. Each time, the electrolyte barrel needs to be moved into the liquid injection workshop, which is inconvenient to operate and affects the experimental process. When the electrolyte barrel is placed in a room temperature or low-temperature warehouse with high environmental air humidity, directly using a conventional aluminum bottle to extract the electrolyte is likely to inhale moisture, which has an adverse effect on the battery core.

[0003] The Chinese invention patent with the authorization announcement number CN102255104B discloses a method for the negative pressure preparation, storage, use and repair of batteries or capacitors. The method adopts a channel connected with a negative pressure pipe and a pipeline, and valves are arranged on both the negative pressure pipe and the pipeline. By switching the valves, the negative pressure preparation, storage, use and repair of batteries or capacitors can be realized. The specific structure of the valve is not disclosed in this invention patent. Whether a manual valve or an electric control valve is adopted, the cost of this structure will be increased, and the opening and closing of the valve need to be manually operated. Summary of the Utility Model

[0004] The purpose of the utility model is to aim at the defects of the prior art, and provide a cap structure for electrolyte extraction, a closed bottle and an electrolyte barrel, which can eliminate the influence of moisture in the environmental humidity without manually controlling the opening and closing of the valve, effectively reduce the hydrolysis of lithium hexafluorophosphate, and improve the operation convenience.

[0005] To solve the above technical problems, in the first aspect, the utility model provides a cap structure for electrolyte extraction, which includes a cap body. An inlet pipe and an exhaust pipe are inserted into the cap body, and the outer walls of the inlet pipe and the exhaust pipe are hermetically arranged with the cap body.

[0006] The inlet pipe includes a first inlet pipe, a second inlet pipe and a third inlet pipe which are connected in sequence. One end of the first inlet pipe passes through the cap body, and the other end of the first inlet pipe is bent so that the second inlet pipe is arranged downward. A first sealing ball is movably arranged in the second inlet pipe. The volume of the first sealing ball is larger than the connection port between the second inlet pipe and the third inlet pipe, so that the first sealing ball can close the connection port under the action of gravity.

[0007] The diameter of the exhaust pipe gradually increases from bottom to top. A second sealing ball is movably arranged in the exhaust pipe, and the second sealing ball can seal the exhaust pipe under the action of gravity.

[0008] Further, the diameters of the first liquid inlet pipe and the third liquid inlet pipe are both smaller than the diameter of the second liquid inlet pipe.

[0009] Further, the diameter of the first liquid inlet pipe is smaller than the diameter of the first sealing ball.

[0010] Further, the diameter of the second liquid inlet pipe is twice the diameter of the first sealing ball.

[0011] Further, the connection port is arranged near the lowest part of the second liquid inlet pipe.

[0012] Further, both the first sealing ball and the second sealing ball include a steel ball and polytetrafluoroethylene wrapped outside the steel ball.

[0013] Further, the diameter of the second sealing ball is equal to the diameter of the middle part of the exhaust pipe.

[0014] Further, the first liquid inlet pipe is a rigid pipe body.

[0015] In a second aspect, the present utility model provides a closed bottle, which includes a bottle body. The cover body is sealingly connected to the bottle body, and the lower ends of the liquid inlet pipe and the exhaust pipe are both inserted into the bottle body.

[0016] In a third aspect, the present utility model provides an electrolyte barrel, which includes a barrel body. The cover body is sealingly connected to the barrel body, and the lower ends of the liquid inlet pipe and the exhaust pipe are both inserted into the barrel body.

[0017] The beneficial effects of the present utility model are as follows:

[0018] 1. In the present utility model, one end of the first liquid inlet pipe is bent so that the second liquid inlet pipe faces downward. As a result, the first sealing ball in the second liquid inlet pipe closes the connection port between the second liquid inlet pipe and the third liquid inlet pipe under the action of gravity, thereby sealing the liquid inlet pipe. When injecting electrolyte into the container corresponding to the cover body, the first sealing ball will be reopened by the electrolyte, thus opening the liquid inlet pipe to achieve the injection of electrolyte. Therefore, the first sealing ball can control the automatic opening and closing of the liquid inlet pipe without the need for an additional control structure. By arranging a second sealing ball in the exhaust pipe, the second sealing ball closes the exhaust pipe under the action of gravity, thereby sealing the exhaust pipe. When injecting electrolyte into the container corresponding to the cover body, the gas in the container will push the second sealing ball upward to discharge the container. Therefore, the second sealing ball can control the automatic opening and closing of the exhaust pipe. Through the automatic opening and closing functions of the first sealing ball and the second sealing ball, the influence of moisture in the ambient humidity on the electrolyte in the container can be effectively excluded, and there is no need for manual operation to open and close the liquid inlet pipe and the exhaust pipe.

[0019] 3. The diameter of the first liquid inlet pipe of the present utility model is smaller than the diameter of the first sealing ball, which can prevent the first sealing ball from entering the container through the first liquid inlet pipe or getting stuck in the first liquid inlet pipe.

[0020] 6. Both the first sealing ball and the second sealing ball of the present utility model include a steel ball and polytetrafluoroethylene wrapped around the steel ball, which can ensure that the sealing ball has sufficient weight while not reacting with the electrolyte.

[0021] 9. The diameter of the second liquid inlet pipe of the present utility model is twice the diameter of the first sealing ball, so that there is a sufficient flow channel after the electrolyte pushes the first sealing ball open, preventing the first sealing ball from blocking at the connection between the first liquid inlet pipe and the second liquid inlet pipe.

[0022] 12. The cover body of the present utility model can be used to seal a bottle or an electrolyte barrel. When used to seal a bottle, the sealed bottle can be used as an intermediate container for taking electrolyte, which is convenient to operate and not easily affected by moisture. When used for an electrolyte barrel, it is convenient to inject electrolyte into the electrolyte barrel and can ensure sealed storage. Description of the Drawings

[0023] Figure 1 is a schematic structural diagram of the present utility model.

[0024] Reference Numerals: 1 - liquid inlet pipe; 11 - first liquid inlet pipe; 12 - second liquid inlet pipe; 13 - third liquid inlet pipe; 2 - first sealing ball; 3 - exhaust pipe; 4 - second sealing ball; 5 - cover body; 6 - bottle body. Detailed Embodiments

[0025] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application clearer and more understandable, the following further details this application in combination with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not used to limit this application.

[0026] As Figure 1 shown, this embodiment provides a closed bottle, which includes a bottle body 6 and a cover body 5 hermetically arranged at the top of the bottle body 6. An inlet pipe 1 and an exhaust pipe 3 are inserted into the cover body 5, and the outer walls of the inlet pipe 1 and the exhaust pipe 3 are hermetically arranged with the cover body 5.

[0027] The inlet pipe 1 includes a first inlet pipe 11, a second inlet pipe 12 and a third inlet pipe 13 connected in sequence. The diameters of the first inlet pipe 11 and the third inlet pipe 13 are both smaller than the diameter of the second inlet pipe 12. One end of the first inlet pipe 11 passes through the cover body 5, and the other end of the first inlet pipe 11 is bent. In this embodiment, the bending angle of the first inlet pipe 11 is 40°. The second inlet pipe 12 and the third inlet pipe 13 are both straight pipes. Therefore, the second inlet pipe 12 and the third inlet pipe 13 are both arranged downward. A first sealing ball 2 is movably arranged in the second inlet pipe 12. The volume of the first sealing ball 2 is larger than the connection port between the second inlet pipe 12 and the third inlet pipe 13, so that the first sealing ball 2 can seal the connection port under the action of gravity. The diameter of the second inlet pipe 12 is twice the diameter of the first sealing ball 2, so that there is enough flow passage after the electrolyte pushes the first sealing ball 2 open, preventing the first sealing ball 2 from blocking at the connection of the first inlet pipe 11 and the second inlet pipe 12.

[0028] In this embodiment, the first inlet pipe 11 is a rigid pipe body, which can prevent the sealing failure of the first sealing ball 2 caused by the change of the bending angle or the shaking of the first inlet pipe 11.

[0029] In this embodiment, the second inlet pipe 12 can also adopt a pipe body with other shapes such as a square pipe.

[0030] In this embodiment, the diameter of the first inlet pipe 11 is smaller than the diameter of the first sealing ball 2, which can prevent the first sealing ball 2 from entering the container through the first inlet pipe 11 or getting stuck in the first inlet pipe 11.

[0031] In this embodiment, the connection port of the second inlet pipe 12 and the third inlet pipe 13 is arranged near the lowest part of the second inlet pipe 12.

[0032] As Figure 1 shown, the diameter of the exhaust pipe 3 gradually increases from the end inserted into the bottle body 6 to the other end. A second sealing ball 4 is movably arranged in the exhaust pipe 3. The diameter of the second sealing ball 4 is equal to the diameter of the middle part of the exhaust pipe 3. The second sealing ball 4 can be blocked in the middle part of the exhaust pipe 3 under the action of gravity, thereby closing the exhaust pipe 3.

[0033] In this embodiment, both the first sealing ball 2 and the second sealing ball 4 include steel balls and polytetrafluoroethylene wrapped outside the steel balls, which can prevent the electrolyte from reacting with the steel balls.

[0034] The usage method of this closed bottle is as follows: In the static state, the first sealing ball 2 and the second sealing ball 4 seal the liquid inlet pipe 1 and the exhaust pipe 3. The bottle body 6 can be pre-filled with inert gas. When using the closed bottle to take the electrolyte, connect the outlet of the adapter of the electrolyte barrel to the third liquid inlet pipe 13. The negative-pressure electrolyte in the electrolyte barrel will lift the first sealing ball 2, so that the electrolyte can enter the bottle body 6 through the liquid inlet pipe 1. During the process of injecting the electrolyte, the second sealing ball 4 is lifted by the gas in the bottle body 6, so that the gas in the bottle body 6 is discharged. After being filled with the electrolyte, the first sealing ball 2 returns to the connection port of the second liquid inlet pipe 12 and the third liquid inlet pipe 13 due to gravity, and the first sealing ball 2 seals the exhaust pipe 3 again, thereby automatically sealing the bottle body 6 again.

[0035] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included within the protection scope of the present application.

Claims

1. A cover structure for electrolyte extraction, characterized in that: It includes a cover body (5), an inlet pipe (1) and an exhaust pipe (3) are inserted into the cover body (5), and a sealing arrangement is provided between the outer walls of the inlet pipe (1) and the exhaust pipe (3) and the cover body (5); The inlet pipe (1) includes a first inlet pipe (11), a second inlet pipe (12) and a third inlet pipe (13) connected in sequence. One end of the first inlet pipe (11) passes through the cover body (5), and the other end of the first inlet pipe (11) is bent so that the second inlet pipe (12) is arranged downward. A first sealing ball (2) is movably arranged in the second inlet pipe (12). The volume of the first sealing ball (2) is larger than the connection port between the second inlet pipe (12) and the third inlet pipe (13), so that the first sealing ball (2) can close the connection port under the action of gravity; the diameter of the first inlet pipe (11) is smaller than the diameter of the first sealing ball (2); The diameter of the exhaust pipe (3) gradually increases from bottom to top. A second sealing ball (4) is movably arranged in the exhaust pipe (3), and the second sealing ball (4) can close the exhaust pipe (3) under the action of gravity.

2. The cap structure for electrolyte extraction according to claim 1, wherein: The diameters of the first inlet pipe (11) and the third inlet pipe (13) are both smaller than the diameter of the second inlet pipe (12).

3. The cover structure for electrolyte extraction according to claim 1, wherein: The diameter of the second inlet pipe (12) is twice the diameter of the first sealing ball (2).

4. The cover structure for taking electrolyte according to claim 1, characterized in that: The connection port is arranged near the lowest part of the second inlet pipe (12).

5. The cover structure for electrolyte extraction according to any one of claims 1 to 4, characterized in that: Both the first sealing ball (2) and the second sealing ball (4) include a steel ball and polytetrafluoroethylene wrapped outside the steel ball.

6. The cover structure for electrolyte extraction according to any one of claims 1 to 4, characterized in that: The diameter of the second sealing ball (4) is equal to the diameter of the middle part of the exhaust pipe (3).

7. The cap structure for electrolyte extraction according to any one of claims 1 to 4, characterized in that: The first inlet pipe (11) is a rigid pipe body.

8. A closed bottle comprising the cap structure for electrolyte extraction according to any one of claims 1 to 7, characterized in that: It includes a bottle body (6). The cover body (5) is sealingly connected to the bottle body (6), and the lower ends of the inlet pipe (1) and the exhaust pipe (3) are both inserted into the bottle body (6).

9. An electrolyte bucket including the cap structure for electrolyte extraction according to any one of claims 1 to 7, characterized in that: It includes a barrel body. The cover body (5) is sealingly connected to the barrel body, and the lower ends of the inlet pipe (1) and the exhaust pipe (3) are both inserted into the barrel body.

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