Rapid sampling joint device for lithium battery electrolyte

Abstract

The utility model provides a lithium battery electrolyte quick sampling joint device which comprises a sampling pipe, a sampling head is arranged at the bottom of the sampling pipe, an opening is formed in the top of the sampling pipe, a push-pull rod is arranged at the opening of the sampling pipe, a push block is arranged at the bottom of the push-pull rod, a liquid outlet pipe is arranged on the side edge of the sampling pipe, and a liquid outlet is formed in the liquid outlet pipe. The liquid outlet pipe is connected with a liquid storage bottle, the top of the liquid storage bottle is communicated with a telescopic corrugated pipe, a connecting rod is arranged at the top of the corrugated pipe, and the connecting rod is connected with the push-pull rod after being transversely bent. According to the device, the corrugated pipe connected with the push-pull rod is arranged, the push-pull rod is pulled to suck the electrolyte into the sampling pipe, and meanwhile, the corrugated pipe is stretched to reduce the internal air pressure, so that the electrolyte in the sampling pipe can be quickly sucked into the liquid storage bottle under the dual action of the air pressure and gravity, and the risk of exposure is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electrolyte sampling, in particular to a lithium battery electrolyte quick sampling connector device. Background Art

[0002] Lithium battery electrolytes are the carriers of ion transport within the battery, conducting ions between the positive and negative electrodes. They are typically formulated under specific conditions and proportions using high-purity organic solvents, lithium electrolyte salts, and necessary additives. Electrolytes have very stringent requirements for moisture content, as the lithium hexafluorophosphate (LFP) salt that makes up the electrolyte is highly deliquescent. Exposure to even trace amounts of water in the air will rapidly decompose, releasing PF5 and producing white smoke.

[0003] Publication No. CN109612780B discloses a lithium battery electrolyte sampling device and its use method. Two rubber pads are placed inside the sampling tube to create a space. This space is then increased to reduce pressure, thereby drawing air from the sampling bottle and allowing electrolyte to enter the bottle. However, this device, which increases the space by turning a knob, is slow and increases the risk of electrolyte exposure. Therefore, a lithium battery electrolyte rapid sampling connector device was proposed to address this issue. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the utility model provides a lithium battery electrolyte rapid sampling connector device, which has the advantage of being able to quickly absorb electrolyte and solves the technical problem that slow electrolyte absorption may lead to exposure and deliquescence.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A lithium battery electrolyte quick sampling connector device includes a sampling tube, a sampling head is provided at the bottom of the sampling tube, the top of the sampling tube is open, a push-pull rod is provided at the opening of the sampling tube, a pushing block is provided at the bottom of the push-pull rod, a liquid outlet pipe is provided on the side of the sampling tube, the liquid outlet pipe is connected to a liquid storage bottle, the top of the liquid storage bottle is connected to a retractable bellows, a connecting rod is provided on the top of the bellows, and the connecting rod is connected to the push-pull rod after being bent laterally.

[0007] Furthermore, the pushing block is in close contact with the wall of the sampling tube, and a valve is provided on the liquid outlet pipe.

[0008] Furthermore, the liquid storage bottle is filled with inert dry gas, and the top of the bellows is closed.

[0009] Furthermore, when the bellows is compressed, the pushing block is located at the bottom of the sampling tube.

[0010] Compared with the existing technology, the technical solution of this application has the following beneficial effects:

[0011] 1. This lithium battery electrolyte quick sampling connector device is equipped with a bellows connected to a push-pull rod. When the push-pull rod is pulled to suck the electrolyte into the sampling tube, the bellows is pulled open, sucking in the air in the liquid storage bottle. After the valve is opened, the liquid storage bottle can quickly suck the electrolyte in the sampling tube, reducing the risk of exposure. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 This is a cross-sectional view of the utility model before use;

[0014] Figure 3 This is a cross-sectional view of the use process of this utility model.

[0015] In the figure: 1- sampling tube; 11- sampling head; 12- push-pull rod; 13- pushing block; 14- liquid outlet pipe; 141- valve;

[0016] 2-Liquid storage bottle;

[0017] 3- bellows; 31- connecting rod. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0019] See also Figure 1-2 In this embodiment, a lithium battery electrolyte quick sampling connector device includes a sampling tube 1, a sampling head 11 is provided at the bottom of the sampling tube 1, the top of the sampling tube 1 is open, a push-pull rod 12 is provided at the opening of the sampling tube 1, a pushing block 13 is provided at the bottom of the push-pull rod 12, a liquid outlet pipe 14 is provided on the side of the sampling tube 1, the liquid outlet pipe 14 is connected to the liquid storage bottle 2, the top of the liquid storage bottle 2 is connected to a retractable bellows 3, a connecting rod 31 is provided on the top of the bellows 3, and the connecting rod 31 is connected to the push-pull rod 12 after being bent horizontally.

[0020] See Figure 3 After inserting the sampling head 11 into the electrolyte, the electrolyte is sucked into the sampling tube 1 by pulling the push-pull rod 12. At the same time, the bellows 3 is stretched through the connecting rod 31, so that the bellows 3 sucks in the air in the liquid storage bottle 2. After opening the valve 141, under the dual action of air pressure and gravity, the liquid storage bottle 2 quickly sucks in the electrolyte in the sampling tube 1, and then the liquid storage bottle 2 is removed for testing, reducing the risk of exposure.

[0021] Furthermore, the pushing block 13 is in close contact with the wall of the sampling tube 1 , and a valve 141 is provided on the liquid outlet pipe 14 .

[0022] The close contact increases the airtightness of the device, and the valve 141 prevents the electrolyte from entering the liquid storage bottle 2 at the beginning, which increases the risk of exposure.

[0023] Furthermore, the liquid storage bottle 2 is filled with dry gas, and the top of the bellows 3 is closed.

[0024] The electrolyte is filled with dry gas to prevent it from coming into contact with water vapor and reacting. The top of the bellows 3 is closed so that the internal air pressure can be controlled.

[0025] Furthermore, when the bellows 3 is compressed, the pushing block 13 is located at the bottom of the sampling tube 1 .

[0026] After the push-pull rod 12 is pulled, the bellows 3 can be stretched better, thereby increasing the liquid-absorbing speed of the liquid storage bottle 2.

[0027] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lithium battery electrolyte quick sampling connector device, comprising a sampling tube (1), characterized in that: The sampling tube (1) is provided with a sampling head (11) at the bottom, the sampling tube (1) is open at the top, a push-pull rod (12) is provided at the opening of the sampling tube (1), a pushing block (13) is provided at the bottom of the push-pull rod (12), a liquid outlet pipe (14) is provided on the side of the sampling tube (1), the liquid outlet pipe (14) is connected to a liquid storage bottle (2), the top of the liquid storage bottle (2) is connected to a retractable bellows (3), a connecting rod (31) is provided at the top of the bellows (3), and the connecting rod (31) is connected to the push-pull rod (12) after being bent transversely.

2. A lithium battery electrolyte quick sampling connector device according to claim 1, characterized in that: The pushing block (13) is in close contact with the wall of the sampling tube (1), and a valve (141) is provided on the liquid outlet tube (14).

3. The lithium battery electrolyte quick sampling connector device according to claim 1, characterized in that: The liquid storage bottle (2) is filled with dry gas, and the top of the bellows (3) is closed.

4. The lithium battery electrolyte quick sampling connector device according to claim 1, characterized in that: When the bellows (3) is compressed, the pushing block (13) is located at the bottom of the sampling tube (1).

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