CN109612780B - Lithium battery electrolyte sampling device and using method thereof - Google Patents
Lithium battery electrolyte sampling device and using method thereof Download PDFInfo
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- CN109612780B CN109612780B CN201811337035.9A CN201811337035A CN109612780B CN 109612780 B CN109612780 B CN 109612780B CN 201811337035 A CN201811337035 A CN 201811337035A CN 109612780 B CN109612780 B CN 109612780B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/14—Suction devices, e.g. pumps; Ejector devices
Abstract
The invention discloses a lithium battery electrolyte sampling device and a using method thereof, wherein the lithium battery electrolyte sampling device comprises a sampling tube, a first rubber pad is movably arranged on the inner side of the sampling tube, a cylindrical hole is formed in the top of the first rubber pad, a probe tube is fixedly adhered to the side wall of the cylindrical hole, the bottom end of the probe tube penetrates through the sampling tube and extends to the lower part of the sampling tube, a first hole is formed in the inner wall of one side of the cylindrical hole, a second hole matched with the first hole in position is formed in the inner wall of one side of the sampling tube, the first hole is communicated with the second hole, a liquid outlet tube is rotatably arranged in the second hole, and a liquid storage bottle is arranged on one side of the sampling tube. The liquid storage bottle has the advantages of reasonable design, convenience in operation and control and high practicability, and can be used for extracting air in the liquid storage bottle, so that electrolyte in the lithium battery can be sucked into the liquid storage bottle, the sampling operation of the electrolyte is facilitated, the probe can be stored, and the probe is prevented from being polluted.
Description
Technical Field
The invention relates to the technical field of lithium battery electrolyte sampling, in particular to a lithium battery electrolyte sampling device and a using method thereof.
Background
The energy crisis is increasingly prominent, so that the research and development and application of new energy materials are particularly important, wherein lithium ion batteries are widely applied as new energy materials in the current society, and lithium ion battery electrolyte is an important component of the lithium ion battery electrolyte. Through the retrieval, application number 201721329529.3's patent document discloses a lithium cell electrolyte sampling device, including the sampling tube that is equipped with well cavity, the sampling tube bottom be equipped with the sample connection of well cavity intercommunication, be equipped with on the sampling tube and control sample connection shutoff or open control mechanism, control mechanism passes through elasticity mechanism elasticity with the sampling tube and links to each other, be equipped with on the sampling tube and drive control mechanism's actuating mechanism, control mechanism is including the chock plug that can shutoff sample connection or open sample connection under actuating mechanism's effect under the effect of elasticity mechanism. Set up control mechanism, elasticity mechanism and actuating mechanism in the sampling tube, after the staff applyed the effort to actuating mechanism, the chock plug on the control mechanism is under the effect of drive power with the sample connection separation, opens the sample connection promptly for electrolyte can get into well cavity through the sample connection, and after the staff withdrawed the effort of applying actuating mechanism, the chock plug resets under the elasticity effect of elasticity mechanism, the shutoff sample connection promptly.
However, the above design still has the disadvantages that the electrolyte sampling device of the above design is inconvenient to extract the air in the liquid storage bottle, so that the electrolyte in the lithium battery is inconvenient to absorb, the sampling operation of the electrolyte is relatively troublesome, and the time consumption is long, so that the lithium battery electrolyte sampling device and the use method thereof are provided for solving the problems.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a lithium battery electrolyte sampling device and a using method thereof.
The invention provides a lithium battery electrolyte sampling device which comprises a sampling tube, wherein a first rubber pad is movably arranged on the inner side of the sampling tube, a cylindrical hole is formed in the top of the first rubber pad, a probe tube is fixedly adhered to the side wall of the cylindrical hole, the bottom end of the probe tube penetrates through the sampling tube and extends to the lower part of the sampling tube, a first hole is formed in the inner wall of one side of the cylindrical hole, a second hole matched with the first hole is formed in the inner wall of one side of the sampling tube, the first hole is communicated with the second hole, a liquid outlet tube is rotatably arranged in the second hole, a liquid storage bottle is arranged on one side of the sampling tube, the liquid outlet tube is in threaded connection with the liquid storage bottle, and the liquid outlet tube is communicated with the interior of the liquid storage bottle;
the sampling tube is characterized in that an annular groove is formed in the side wall of the cylindrical hole, a rotary disc is installed in the annular groove in a rotating mode, a screw rod is welded at the top of the rotary disc, a second rubber pad is sleeved on the outer side of the screw rod in a threaded mode, the first rubber pad and the second rubber pad are connected with the inner side of the sampling tube in a movable and sealed mode, a first joint is arranged on the top side of the liquid storage bottle, a second joint is fixedly connected to the inner wall of one side of the sampling tube, a liquid guide tube is fixedly connected to the first joint and the second joint, the second joint is located between the first rubber pad and the second rubber pad, the second joint is communicated with the inside of the sampling tube, the first joint is communicated with the inside of the liquid storage bottle, a first tube is fixedly connected to one side of the.
Preferably, the outer side of the liquid outlet pipe is fixedly sleeved with a bearing, and an outer ring of the bearing is welded with the inner wall of the second hole.
Preferably, a sealing ring is fixedly adhered to the inner wall of the second hole, and the inner side of the sealing ring is in rotary sealing connection with the outer side of the liquid outlet pipe.
Preferably, the inner wall of the liquid storage bottle is provided with a first threaded hole, and the outer side of the liquid outlet pipe is in threaded connection with the first threaded hole.
Preferably, a second threaded hole is formed in the top of the second rubber pad, and the screw is in threaded connection with the second threaded hole.
Preferably, the top end of the probe tube moves to the upper part of the first hole and is welded with the baffle plate.
Preferably, the top end of the screw rod extends to the upper part of the sampling tube and is welded with a knob.
Preferably, the inner wall of the bottom side of the sampling tube is provided with a through hole matched with the probe tube, and the probe tube is movably connected with the through hole.
Preferably, the cross section of the first rubber pad, the cross section of the second rubber pad and the cross section of the sampling tube are all rectangular structures.
The invention also provides a lithium battery electrolyte sampling device, which comprises the following steps:
s1: firstly, aligning one end of a liquid outlet pipe, which is positioned outside a sampling pipe, to the position of a first threaded hole on a liquid storage bottle, inserting the liquid outlet pipe into the first threaded hole, rotating the liquid outlet pipe in a second hole through a bearing, arranging a sealing ring between the second hole and the liquid outlet pipe, ensuring the sealing property between the liquid outlet pipe and the second hole while rotating the liquid outlet pipe, and connecting the liquid storage bottle to the liquid outlet pipe until the liquid outlet pipe is screwed into the liquid storage bottle;
s2: inserting the bottom end of the probe tube into electrolyte in the lithium battery, rotating the knob, driving the rotary disc to rotate by the knob through the screw rod, driving the second rubber pad to move upwards when the screw rod rotates due to the fact that the screw rod is in threaded connection with the second rubber pad, and enabling the second rubber pad to move upwards on the inner side of the sampling tube at the moment, so that the distance between the second rubber pad and the first rubber pad is increased;
s3: because the stock solution bottle is through first joint, the second connects, the catheter is linked together with the inside of sampling tube, air will enter into in the stock solution bottle this moment, because the stock solution bottle is through first hole, the second hole, the drain pipe, first pipe is linked together with visiting the pipe, visit intraductal air will enter into the stock solution bottle gradually this moment, visit intraductal atmospheric pressure and reduce, electrolyte in the lithium cell will enter into in visiting the pipe under the effect of atmospheric pressure, continue the rotating knob, make electrolyte in the lithium cell loop through visiting the pipe, enter into in the stock solution bottle behind the drain pipe, be convenient for take a sample to electrolyte in the lithium cell, and after the sample, upwards carry and draw the knob, can accomodate visiting the pipe in the sampling tube, avoid visiting the pipe and receive the pollution.
Compared with the prior art, the invention has the beneficial effects that:
(1) the liquid storage bottle is characterized in that the liquid storage bottle is provided with a first threaded hole, a second threaded hole, a liquid outlet pipe, a liquid storage bottle, a first threaded hole, a bearing and a sealing ring, wherein the first threaded hole is arranged at the outer side of the liquid outlet pipe;
(2) the bottom end of the probe tube is inserted into electrolyte in the lithium battery through the matching of the annular groove, the rotary table, the screw rod, the second rubber pad, the second threaded hole and the knob, the knob is rotated, the rotary table is driven to rotate through the screw rod, the rotary table rotates in the annular groove at the moment, the screw rod is in threaded connection with the second rubber pad, the second rubber pad is driven to move upwards when the screw rod rotates, the second rubber pad moves upwards on the inner side of the sampling tube, and the distance between the second rubber pad and the first rubber pad is increased;
(3) through the matching of the sampling tube, the first rubber pad, the cylindrical hole, the probe tube, the first joint, the second joint, the liquid guide tube, the first tube, the clapboard and the through hole, because the liquid storage bottle is communicated with the interior of the sampling tube through the first connector, the second connector and the liquid guide tube, the air in the liquid storage bottle enters the sampling tube, because the liquid storage bottle is communicated with the probe tube through the first hole, the second hole, the liquid outlet tube and the first tube, air in the probe tube gradually enters the liquid storage bottle, the air pressure in the probe tube is reduced, electrolyte in the lithium battery enters the probe tube under the action of atmospheric pressure, the knob is continuously rotated, the electrolyte in the lithium battery enters the liquid storage bottle after sequentially passing through the probe tube and the liquid outlet tube, the sampling of the electrolyte in the lithium battery is convenient, and after the sample, to lifting pull knob, can accomodate the probe tube in the sample tube, avoid the probe tube to receive the pollution.
The liquid storage bottle has the advantages of reasonable design, convenience in operation and control and high practicability, and can be used for extracting air in the liquid storage bottle, so that electrolyte in the lithium battery can be sucked into the liquid storage bottle, the sampling operation of the electrolyte is facilitated, the probe can be stored, and the probe is prevented from being polluted.
Drawings
FIG. 1 is a schematic structural diagram of a lithium battery electrolyte sampling device according to the present invention;
FIG. 2 is a schematic structural diagram of part A of a lithium battery electrolyte sampling device according to the present invention;
FIG. 3 is a schematic structural diagram of a portion B of a lithium battery electrolyte sampling device according to the present invention;
FIG. 4 is a schematic structural diagram of a portion C of a lithium battery electrolyte sampling device according to the present invention;
fig. 5 is a schematic perspective view of a second rubber pad in the lithium battery electrolyte sampling device according to the present invention.
In the figure: the sampling tube 1, the first rubber pad 2, the cylindrical hole 3, the probe tube 4, the first hole 5, the second hole 6, the liquid outlet tube 7, the liquid storage bottle 8, the annular groove 9, the rotary disc 10, the screw rod 11, the second rubber pad 12, the first joint 13, the second joint 14, the liquid guide tube 15, the first threaded hole 16, the second threaded hole 17, the knob 18, the bearing 19, the first tube 20, the partition plate 21, the through hole 22 and the sealing ring 23.
Detailed Description
The present invention will be further illustrated with reference to the following specific examples.
Examples
Referring to fig. 1-5, the embodiment provides a lithium battery electrolyte sampling device, including a sampling tube 1, a first rubber pad 2 is movably mounted on an inner side of the sampling tube 1, a cylindrical hole 3 is formed in a top portion of the first rubber pad 2, a probe tube 4 is fixedly adhered to a side wall of the cylindrical hole 3, a bottom end of the probe tube 4 penetrates through the sampling tube 1 and extends to a lower portion of the sampling tube 1, a first hole 5 is formed in an inner wall of one side of the cylindrical hole 3, a second hole 6 matched with the first hole 5 in position is formed in an inner wall of one side of the sampling tube 1, the first hole 5 is communicated with the second hole 6, a rotary liquid outlet tube 7 is mounted in the second hole 6, a liquid storage bottle 8 is arranged on one side of the sampling tube 1, the liquid outlet tube 7 is in threaded connection with the liquid storage bottle 8, and the liquid outlet tube 7 is communicated with an; an annular groove 9 is formed in the side wall of the cylindrical hole 3, a rotary disc 10 is rotatably mounted in the annular groove 9, a screw rod 11 is welded at the top of the rotary disc 10, a second rubber pad 12 is sleeved on the outer side thread of the screw rod 11, the first rubber pad 2 and the second rubber pad 12 are both movably and hermetically connected with the inner side of the sampling tube 1, a first joint 13 is arranged on the top side of the liquid storage bottle 8, a second joint 14 is fixedly connected onto the inner wall of one side of the sampling tube 1, a liquid guide pipe 15 is fixedly connected onto the first joint 13 and the second joint 14, the second joint 14 is positioned between the first rubber pad 2 and the second rubber pad 12, the second joint 14 is communicated with the interior of the sampling tube 1, the first joint 13 is communicated with the interior of the liquid storage bottle 8, a first tube 20 is fixedly connected onto one side of the probe tube 4, two ends of the first tube 20 are respectively communicated with the first hole 5 and the probe tube 4, and, Under the cooperation of the liquid storage bottle 8, the first threaded hole 16, the bearing 19 and the sealing ring 23, one end of the liquid outlet pipe 7, which is positioned at the outer side of the sampling pipe 1, is aligned with the position of the first threaded hole 16 on the liquid storage bottle 8, the liquid outlet pipe 7 is inserted into the first threaded hole 16, the liquid outlet pipe 7 is rotated, the liquid outlet pipe 7 rotates in the second hole 6 through the bearing 19, the sealing ring 23 is arranged between the second hole 6 and the liquid outlet pipe 7, the sealing performance between the liquid outlet pipe 7 and the second hole 6 can be ensured when the liquid outlet pipe 7 rotates, until the liquid outlet pipe 7 is screwed into the liquid storage bottle 8, and the liquid storage bottle 8 can be connected onto the liquid outlet pipe 7; under the matching of the annular groove 9, the rotary table 10, the screw rod 11, the second rubber pad 12, the second threaded hole 17 and the knob 18, the bottom end of the probe tube 4 is inserted into electrolyte in the lithium battery, the knob 18 is rotated, the knob 18 drives the rotary table 10 to rotate through the screw rod 11, at the moment, the rotary table 10 rotates in the annular groove 9, the screw rod 11 is in threaded connection with the second rubber pad 12, the screw rod 11 drives the second rubber pad 12 to move upwards when rotating, the second rubber pad 12 moves upwards on the inner side of the probe tube 1, and the distance between the second rubber pad 12 and the first rubber pad 2 is increased; under the matching of the sampling tube 1, the first rubber pad 2, the cylindrical hole 3, the probe tube 4, the first joint 13, the second joint 14, the liquid guide tube 15, the first tube 20, the partition plate 21 and the through hole 22, because the liquid storage bottle 8 is communicated with the interior of the sampling tube 1 through the first joint 13, the second joint 14 and the liquid guide tube 15, the air in the liquid storage bottle 8 enters the sampling tube 1, because the liquid storage bottle 8 is communicated with the probe tube 4 through the first hole 5, the second hole 6, the liquid outlet tube 7 and the first tube 20, the air in the probe tube 4 gradually enters the liquid storage bottle 8, the pressure in the probe tube 4 is reduced, the electrolyte in the lithium battery enters the probe tube 4 under the action of atmospheric pressure, the knob 18 is continuously rotated, so that the electrolyte in the lithium battery enters the liquid storage bottle 8 after passing through the probe tube 4 and the liquid outlet tube 7 in sequence, the sampling of the electrolyte in the lithium battery is convenient, and after the sampling is finished, the sampling device has the advantages that the sampling device is reasonable in design, convenient to operate and control, high in practicability and capable of extracting air in the liquid storage bottle 8, so that electrolyte in the lithium battery can be sucked into the liquid storage bottle 8, the sampling operation of the electrolyte is convenient to carry out, the probe tube 4 can be accommodated, and the probe tube 4 is prevented from being polluted.
In this embodiment, a bearing 19 is fixedly sleeved on the outer side of the liquid outlet pipe 7, the outer ring of the bearing 19 is welded with the inner wall of the second hole 6, a sealing ring 23 is fixedly adhered on the inner wall of the second hole 6, the inner side of the sealing ring 23 is rotatably and hermetically connected with the outer side of the liquid outlet pipe 7, a first threaded hole 16 is formed in the inner wall of the liquid storage bottle 8, the outer side of the liquid outlet pipe 7 is in threaded connection with the first threaded hole 16, a second threaded hole 17 is formed in the top of the second rubber pad 12, the screw rod 11 is in threaded connection with the second threaded hole 17, the top end of the probe 4 is moved to the position above the first hole 5 and welded with a partition plate 21, the top end of the screw rod 11 is extended to the position above the sampling tube 1 and welded with a knob 18, a through hole 22 matched with the probe 4 is formed in the inner wall of the bottom side of the sampling tube 1, the probe 4 is movably connected with the through hole 22, under the cooperation of the first hole 5, the second hole 6, the liquid outlet pipe 7, the liquid storage bottle 8, the first threaded hole 16, the bearing 19 and the sealing ring 23, one end of the liquid outlet pipe 7, which is positioned at the outer side of the sampling pipe 1, is aligned with the position of the first threaded hole 16 on the liquid storage bottle 8, the liquid outlet pipe 7 is inserted into the first threaded hole 16, the liquid outlet pipe 7 is rotated, the liquid outlet pipe 7 rotates in the second hole 6 through the bearing 19, the sealing ring 23 is arranged between the second hole 6 and the liquid outlet pipe 7, the sealing performance between the liquid outlet pipe 7 and the second hole 6 can be ensured when the liquid outlet pipe 7 rotates, and the liquid storage bottle 8 can be connected to the liquid outlet pipe 7 until the liquid outlet pipe 7 is screwed into the liquid storage bottle 8; under the matching of the annular groove 9, the rotary table 10, the screw rod 11, the second rubber pad 12, the second threaded hole 17 and the knob 18, the bottom end of the probe tube 4 is inserted into electrolyte in the lithium battery, the knob 18 is rotated, the knob 18 drives the rotary table 10 to rotate through the screw rod 11, at the moment, the rotary table 10 rotates in the annular groove 9, the screw rod 11 is in threaded connection with the second rubber pad 12, the screw rod 11 drives the second rubber pad 12 to move upwards when rotating, the second rubber pad 12 moves upwards on the inner side of the probe tube 1, and the distance between the second rubber pad 12 and the first rubber pad 2 is increased; under the matching of the sampling tube 1, the first rubber pad 2, the cylindrical hole 3, the probe tube 4, the first joint 13, the second joint 14, the liquid guide tube 15, the first tube 20, the partition plate 21 and the through hole 22, because the liquid storage bottle 8 is communicated with the interior of the sampling tube 1 through the first joint 13, the second joint 14 and the liquid guide tube 15, the air in the liquid storage bottle 8 enters the sampling tube 1, because the liquid storage bottle 8 is communicated with the probe tube 4 through the first hole 5, the second hole 6, the liquid outlet tube 7 and the first tube 20, the air in the probe tube 4 gradually enters the liquid storage bottle 8, the pressure in the probe tube 4 is reduced, the electrolyte in the lithium battery enters the probe tube 4 under the action of atmospheric pressure, the knob 18 is continuously rotated, so that the electrolyte in the lithium battery enters the liquid storage bottle 8 after passing through the probe tube 4 and the liquid outlet tube 7 in sequence, the sampling of the electrolyte in the lithium battery is convenient, and after the sampling is finished, the sampling device has the advantages that the sampling device is reasonable in design, convenient to operate and control, high in practicability and capable of extracting air in the liquid storage bottle 8, so that electrolyte in the lithium battery can be sucked into the liquid storage bottle 8, the sampling operation of the electrolyte is convenient to carry out, the probe tube 4 can be accommodated, and the probe tube 4 is prevented from being polluted.
This embodiment has still provided a lithium cell electrolyte sampling device, includes following step:
s1: firstly, aligning one end of the liquid outlet pipe 7, which is positioned at the outer side of the sampling pipe 1, with the position of a first threaded hole 16 on the liquid storage bottle 8, inserting the liquid outlet pipe 7 into the first threaded hole 16, rotating the liquid outlet pipe 7 in a second hole 6 through a bearing 19 at the moment, arranging a sealing ring 23 between the second hole 6 and the liquid outlet pipe 7, ensuring the sealing property between the liquid outlet pipe 7 and the second hole 6 when the liquid outlet pipe 7 rotates, and connecting the liquid storage bottle 8 to the liquid outlet pipe 7 until the liquid outlet pipe 7 is screwed into the liquid storage bottle 8;
s2: inserting the bottom end of the probe tube 4 into an electrolyte in a lithium battery, turning a knob 18, wherein the knob 18 drives a rotary table 10 to rotate through a screw rod 11, at the moment, the rotary table 10 rotates in an annular groove 9, and due to the fact that the screw rod 11 is in threaded connection with a second rubber pad 12, the screw rod 11 drives the second rubber pad 12 to move upwards when rotating, at the moment, the second rubber pad 12 moves upwards on the inner side of the sampling tube 1, and the distance between the second rubber pad 12 and a first rubber pad 2 is increased;
s3: because stock solution bottle 8 is through first joint 13, the second connects 14, catheter 15 is linked together with sampling tube 1's inside, air will enter into sampling tube 1 in the stock solution bottle 8 this moment, because stock solution bottle 8 is through first hole 5, second hole 6, drain pipe 7, first pipe 20 is linked together with visiting pipe 4, visit pipe 4 interior air will enter into in the stock solution bottle 8 gradually this moment, visit pipe 4 internal gas pressure reduction, electrolyte in the lithium cell will enter into in visiting pipe 4 under the effect of atmospheric pressure, continue rotating knob 18, make electrolyte in the lithium cell loop through visiting pipe 4, enter into in the stock solution bottle 8 behind the drain pipe 7, be convenient for take a sample to the electrolyte in the lithium cell, and after the sample, upwards lift knob 18, can accomodate visiting pipe 4 in sampling tube 1, avoid visiting pipe 4 to receive the pollution.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (3)
1. The lithium battery electrolyte sampling device comprises a sampling tube (1) and is characterized in that a first rubber pad (2) is movably mounted on the inner side of the sampling tube (1), a cylindrical hole (3) is formed in the top of the first rubber pad (2), a probe tube (4) is fixedly adhered to the side wall of the cylindrical hole (3), the bottom end of the probe tube (4) penetrates through the sampling tube (1) and extends to the lower part of the sampling tube (1), a first hole (5) is formed in the inner wall of one side of the cylindrical hole (3), a second hole (6) matched with the first hole (5) in position is formed in the inner wall of one side of the sampling tube (1), the first hole (5) is communicated with the second hole (6), a liquid outlet tube (7) is rotatably mounted in the second hole (6), a liquid storage bottle (8) is arranged on one side of the sampling tube (1), and the liquid outlet tube (7) is in threaded connection with the liquid storage bottle (8), and the liquid outlet pipe (7) is communicated with the inside of the liquid storage bottle (8);
the side wall of the cylindrical hole (3) is provided with an annular groove (9), a rotary disc (10) is rotatably installed in the annular groove (9), a screw rod (11) is welded at the top of the rotary disc (10), a second rubber pad (12) is sleeved on the outer side thread of the screw rod (11), the first rubber pad (2) and the second rubber pad (12) are both movably and hermetically connected with the inner side of the sampling tube (1), a first joint (13) is arranged on the top side of the liquid storage bottle (8), a second joint (14) is fixedly connected on the inner wall of one side of the sampling tube (1), liquid guide pipes (15) are fixedly connected on the first joint (13) and the second joint (14), the second joint (14) is positioned between the first rubber pad (2) and the second rubber pad (12), the second joint (14) is communicated with the inner part of the sampling tube (1), and the first joint (13) is communicated with the inner part of the liquid storage bottle (8), a first pipe (20) is fixedly connected to one side of the probe pipe (4), and two ends of the first pipe (20) are respectively communicated with the first hole (5) and the probe pipe (4);
a bearing (19) is fixedly sleeved on the outer side of the liquid outlet pipe (7), and the outer ring of the bearing (19) is welded with the inner wall of the second hole (6);
a sealing ring (23) is fixedly adhered to the inner wall of the second hole (6), and the inner side of the sealing ring (23) is in rotary sealing connection with the outer side of the liquid outlet pipe (7);
a first threaded hole (16) is formed in the inner wall of the liquid storage bottle (8), and the outer side of the liquid outlet pipe (7) is in threaded connection with the first threaded hole (16);
a second threaded hole (17) is formed in the top of the second rubber pad (12), and the screw rod (11) is in threaded connection with the second threaded hole (17);
the top end of the probe tube (4) moves to the position above the first hole (5) and is welded with a partition plate (21);
the top end of the screw rod (11) extends to the upper part of the sampling tube (1) and is welded with a knob (18);
the cross section of the first rubber pad (2), the cross section of the second rubber pad (12) and the cross section of the sampling tube (1) are all rectangular structures.
2. The lithium battery electrolyte sampling device according to claim 1, wherein the inner wall of the bottom side of the sampling tube (1) is provided with a through hole (22) matched with the probe tube (4), and the probe tube (4) is movably connected with the through hole (22).
3. A sampling method of a lithium battery electrolyte sampling device according to claim 1 or 2, characterized by comprising the steps of:
s1: firstly, aligning one end of a liquid outlet pipe (7) positioned at the outer side of a sampling pipe (1) with the position of a first threaded hole (16) on a liquid storage bottle (8), inserting the liquid outlet pipe (7) into the first threaded hole (16), rotating the liquid outlet pipe (7) in a second hole (6) through a bearing (19), arranging a sealing ring (23) between the second hole (6) and the liquid outlet pipe (7), ensuring the sealing property between the liquid outlet pipe (7) and the second hole (6) when the liquid outlet pipe (7) rotates until the liquid outlet pipe (7) is screwed into the liquid storage bottle (8), and connecting the liquid storage bottle (8) on the liquid outlet pipe (7);
s2: inserting the bottom end of the probe tube (4) into electrolyte in a lithium battery, rotating a knob (18), wherein the knob (18) drives a rotary disc (10) to start rotating through a screw rod (11), at the moment, the rotary disc (10) rotates in an annular groove (9), and due to the fact that the screw rod (11) is in threaded connection with a second rubber pad (12), the screw rod (11) drives the second rubber pad (12) to move upwards when rotating, and at the moment, the second rubber pad (12) moves upwards in the inner side of the sampling tube (1), and the distance between the second rubber pad (12) and a first rubber pad (2) is increased;
s3: because the liquid storage bottle (8) is communicated with the interior of the sampling tube (1) through the first connector (13), the second connector (14) and the liquid guide tube (15), air in the liquid storage bottle (8) enters the sampling tube (1), because the liquid storage bottle (8) is communicated with the probe tube (4) through the first hole (5), the second hole (6), the liquid outlet tube (7) and the first tube (20), air in the probe tube (4) gradually enters the liquid storage bottle (8), the pressure in the probe tube (4) is reduced, electrolyte in the lithium battery enters the probe tube (4) under the action of atmospheric pressure, the knob (18) is continuously rotated, so that the electrolyte in the lithium battery enters the liquid storage bottle (8) after passing through the probe tube (4) and the liquid outlet tube (7) in sequence, the sampling of the electrolyte in the lithium battery is convenient, and after the sampling is finished, the knob (18) is lifted upwards, can accomodate probe (4) in sampling tube (1), avoid probe (4) to receive the pollution.
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