Lithium salt container convenient for sampling

Abstract

The utility model provides a lithium salt container convenient for sampling, which relates to the technical field of lithium batteries, and comprises a container main body for storing lithium salt; the top of the container main body is provided with a feed port, and the bottom is provided with a discharge port; the vacuumizing interface is arranged on the container main body; the replacement interface is arranged on the container main body and is used for introducing inert gas into the container main body; the shielding gas interface is arranged on the container main body and is used for filling shielding gas into the container main body; the sampling interface is connected with the container main body, and a first sampling valve is arranged on the sampling interface; the sampling containers are in one-to-one correspondence with the sampling interfaces and are detachably connected with the sampling interfaces in a sealing manner; an accommodating cavity capable of being opened and closed is formed in the sampling container; and a second sampling valve is arranged on the sampling container. When the sample in the accommodating cavity needs to be taken away, only the first sampling valve and the second sampling valve need to be closed, and the sampling container is detached from the sampling interface, so that the sampling container does not need to be replaced again, and the sampling process is simpler and more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, in particular to a lithium salt container convenient for sampling. Background Art

[0002] With the rapid development of new energy vehicles, the consumption of lithium salts, which are the main raw materials of lithium secondary batteries, is also increasing. These lithium salts, such as lithium hexafluorophosphate, are powder materials. When exposed to air, they will undergo a violent decomposition reaction with the moisture in the air, thus releasing corrosive white smoke. Therefore, it is strictly prohibited for lithium salts to come into contact with air.

[0003] At present, the operation of sampling lithium salts from a stainless-steel lithium salt storage barrel (with nitrogen protection) is as follows: First, an external vacuum pumping device and a nitrogen source are connected to make the inside of the tank container for sampling in a nitrogen atmosphere, and then the tank container is connected to the discharge port of the stainless-steel lithium salt storage barrel for sampling.

[0004] Although the above operation can effectively ensure the safety of the operation process and the quality of the sample, it is necessary to separately perform multiple vacuum pumping and nitrogen replacement operations on the tank container to ensure that the inside of the tank container is in a nitrogen atmosphere. The sampling process is a bit cumbersome and needs to be improved. Summary of the Utility Model

[0005] In view of the above situation, the utility model provides a lithium salt container convenient for sampling, aiming to solve the technical problem that the existing sampling process is a bit cumbersome.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] The utility model provides a lithium salt container convenient for sampling, including:

[0008] A container body for storing lithium salts; the top of the container body has a feed inlet, and the bottom has a discharge outlet;

[0009] A vacuum pumping interface provided on the container body;

[0010] A replacement interface provided on the container body for introducing an inert gas into the container body;

[0011] A protective gas interface provided on the container body for filling a protective gas into the container body;

[0012] A sampling interface connected to the container body, and a first sampling valve is provided on the sampling interface;

[0013] A sampling container corresponding to the sampling interface one by one, the two are hermetically connected and detachable; the sampling container has an openable and closable accommodation cavity; a second sampling valve is provided on the sampling container, and the second sampling valve is used to control the opening and closing of the accommodation cavity.

[0014] In some embodiments of the present utility model, there are multiple sampling interfaces.

[0015] In some embodiments of the present utility model, the multiple sampling interfaces are arranged at intervals in the vertical direction.

[0016] In some embodiments of the present utility model, three sampling interfaces are respectively connected to the upper, middle and lower parts of the container body.

[0017] In some embodiments of the present utility model, the volume of the accommodating cavity is adjustable.

[0018] In some embodiments of the present utility model, there is a cavity in the sampling container, and a sealing plug is slidably and sealingly fitted in the cavity; the cavity, the sealing plug and the second sampling valve jointly define a space to form the accommodating cavity.

[0019] In some embodiments of the present utility model, the lower end of the cavity is open.

[0020] In some embodiments of the present utility model, the sealing plug is connected with a driving rod, and the driving rod is located outside the cavity.

[0021] In some embodiments of the present utility model, a end cover is detachably connected to the open lower end of the cavity, and the driving rod movably penetrates through the end cover.

[0022] In some embodiments of the present utility model, the driving rod is threadedly connected with the end cover, the driving rod is rotatably connected with a connecting rod, and the connecting rod is connected with the sealing plug.

[0023] The embodiments of the present utility model have at least the following advantages or beneficial effects:

[0024] When it is necessary to take away the sample in the accommodating cavity, only need to close the first sampling valve and the second sampling valve, and detach the sampling container from the sampling interface, without the need to replace the sampling container again, and the sampling process is simpler and more convenient.

[0025] Other features and advantages of the present utility model will be described in the subsequent specification, and, in part, will be obvious from the specification, or will be understood by implementing the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0027] Figure 1 Structural schematic diagram of a lithium salt container for facilitating sampling;

[0028] Figure 2 Structural schematic diagram of a sampling container.

[0029] Icons: 1 - container body, 11 - feed inlet, 12 - discharge outlet, 2 - vacuum pumping interface, 3 - replacement interface, 4 - protective gas interface, 5 - sampling interface, 51 - first sampling valve, 6 - sampling container, 61 - accommodation cavity, 62 - second sampling valve, 63 - cavity, 64 - sealing plug, 65 - driving rod, 66 - end cover, 67 - connecting rod, 68 - convex ring, 69 - annular groove. Detailed implementation manners

[0030] In the following, only some exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the embodiments of the present invention.

[0031] In the description of the embodiments of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for facilitating the description of the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the embodiments of the present invention.

[0032] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0033] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be directly connected or indirectly connected through an intermediate medium, and can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific situations.

[0034] The embodiments of the present invention will be described in detail below with reference to the drawings.

[0035] Embodiment

[0036] See Figures 1 to 2 , this embodiment provides a lithium salt container convenient for sampling, including a container body 1, a vacuum pumping interface 2, a replacement interface 3, a protective gas interface 4, a sampling interface 5 and a sampling container 6.

[0037] The container body 1 is used for storing lithium salt; the top of the container body 1 has a feed inlet 11 and the bottom has a discharge outlet 12. A feed valve is provided on the feed inlet 11 and a discharge valve is provided on the discharge outlet 12.

[0038] The vacuum pumping interface 2 is arranged on the upper part of the container body 1 and is used for connecting with vacuum pumping equipment such as a vacuum pump. A vacuum pumping valve is provided on the vacuum pumping interface 2.

[0039] The replacement interface 3 is arranged on the upper part of the container body 1 and is used for introducing inert gases such as nitrogen into the container body 1. A replacement valve is provided on the replacement interface 3.

[0040] The protective gas interface 4 is arranged on the upper part of the container body 1 and is used for supplementing inert gases such as nitrogen into the container body 1 as protective gas. A protective gas valve is provided on the protective gas interface 4.

[0041] The sampling interface 5 is connected to the container body 1, and a first sampling valve 51 is provided on the sampling interface 5. In this embodiment, there are multiple sampling interfaces 5, and the multiple sampling interfaces 5 are arranged at intervals in the vertical direction to expand the sampling range. In a specific implementation scenario, three sampling interfaces 5 are respectively connected to the upper, middle and lower parts of the container body 1.

[0042] The sampling container 6 corresponds to the sampling interface 5 one by one, and the two are hermetically connected by a flange and are detachable. The sampling container 6 has an openable and closable accommodation cavity 61, and the accommodation cavity 61 is used for accommodating samples; a second sampling valve 62 is provided on the sampling container 6, and the second sampling valve 62 is used to control the opening and closing of the accommodation cavity 61.

[0043] Each of the foregoing valves can be a manual valve or a solenoid valve.

[0044] Before introducing the lithium salt into the container body 1, connect the vacuum interface 2 to a vacuum device such as a vacuum pump to evacuate the air, and then introduce an inert gas such as nitrogen into the container body 1 through the replacement interface 3. Repeat this process several times to replace the air in the container body 1. Then, the lithium salt can be introduced into the container body 1 through the feed port 11 for storage. That is to say, before storing the lithium salt, the container body 1 needs to be replaced. During the process of replacing the air in the container body 1, keep the first sampling valve 51 and the second sampling valve 62 open, so that the gas atmosphere in the accommodation cavity 61 of the sampling container is the same as that in the container body 1, and the lithium salt introduced into the container body 1 can also enter the accommodation cavity 61 of the sampling container. When it is necessary to take away the sample in the accommodation cavity 61, just close the first sampling valve 51 and the second sampling valve 62, and remove the sampling container 6 from the sampling interface 5. There is no need to replace the sampling container 6 again, and the sampling process is simpler and more convenient.

[0045] To facilitate adjusting the sampling amount, the volume of the accommodation cavity 61 is adjustable. Specifically, there is a cavity 63 in the sampling container 6, and a sealing plug 64 is slidably and sealingly fitted in the cavity 63. The cavity 63, the sealing plug 64 and the second sampling valve 62 together define a space to form the accommodation cavity 61. Moving the sealing plug 64 up and down can adjust the volume of the accommodation cavity 61. In this embodiment, before installing the sampling container 6, first adjust the volume of the accommodation cavity 61.

[0046] In this embodiment, the lower end of the cavity 63 is open, and the sealing plug 64 is connected with a driving rod 65, and the driving rod 65 is located outside the cavity 63. The setting of the driving rod 65 facilitates moving the sealing plug 64.

[0047] Furthermore, a end cap 66 is detachably connected to the open lower end of the cavity 63 by screws, and the driving rod 65 movably penetrates through the end cap 66. The setting of the end cap 66 can, on the one hand, prevent dust from entering the cavity 63, and on the other hand, play a guiding role for the movement of the driving rod 65.

[0048] Furthermore, the driving rod 65 is threadedly connected to the end cap 66, and the driving rod 65 is rotatably connected with a connecting rod 67, and the connecting rod 67 is connected to the sealing plug 64. Rotating the driving rod 65 can move the sealing plug 64 up and down. The driving rod 65 is connected to the sealing plug 64 through the connecting rod 67, and the driving rod 65 can rotate relative to the connecting rod 67. In this way, the sealing plug 64 only needs to move up and down without rotating, and the wear is small.

[0049] In this embodiment, the driving rod 65 and the connecting rod 67 are rotatably connected in the following way: one end of the driving rod 65 has a convex ring 68, and one end of the connecting rod 67 has an annular groove 69 matching the convex ring 68, and the convex ring 68 is rotatably fitted in the annular groove 69.

[0050] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and changes. Without conflict, the embodiments of this application and the features in the embodiments can be combined arbitrarily. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A lithium salt container convenient for sampling, characterized in that: include: A container body, used for storing lithium salt; the container body has a feed inlet at the top and a discharge outlet at the bottom; A vacuum extraction interface, arranged on the container body; A replacement interface, provided on the container body, for introducing an inert gas into the container body; A protective gas interface, provided on the container body, for filling the container body with protective gas; A sampling interface connected to the container body, wherein a first sampling valve is provided on the sampling interface; The sampling container corresponds to the sampling interface one by one, and the two are sealed and detachable; the sampling container has an openable and closable accommodating cavity; the sampling container is provided with a second sampling valve, and the second sampling valve is used to control the opening and closing of the accommodating cavity.

2. The lithium salt container for easy sampling according to claim 1, characterized in that: There are multiple sampling interfaces.

3. The lithium salt container for easy sampling according to claim 2, characterized in that: The plurality of sampling interfaces are arranged at intervals in the vertical direction.

4. The lithium salt container for easy sampling according to claim 1, characterized in that: The three sampling interfaces are respectively connected to the upper part, the middle part and the lower part of the container body.

5. The lithium salt container for easy sampling according to any one of claims 1 to 4, characterized in that: The volume of the accommodating chamber is adjustable.

6. The lithium salt container for easy sampling according to claim 5, characterized in that: The sampling container has a cavity in it, and a sealing plug is slidingly sealed in the cavity; the cavity, the sealing plug and the second sampling valve jointly define a space to form the accommodating chamber.

7. The lithium salt container for easy sampling according to claim 6, characterized in that: The lower end of the cavity is open.

8. The lithium salt container for easy sampling according to claim 7, characterized in that: The sealing plug is connected with a driving rod, and the driving rod is located outside the cavity.

9. The lithium salt container for easy sampling according to claim 8, characterized in that: An end cover is detachably connected to the open lower end of the cavity, and the driving rod movably passes through the end cover.

10. The lithium salt container for easy sampling according to claim 9, characterized in that: The driving rod is threadedly connected to the end cover, the driving rod is rotatably connected to a connecting rod, and the connecting rod is connected to the sealing plug.

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