Test fixture for crosslinking degree of lithium battery diaphragm

Abstract

The utility model discloses a lithium battery diaphragm crosslinking degree test fixture, including container, connecting pipe and screen mesh, the container has the accommodation cavity, connecting pipe is provided in the accommodation cavity, the connecting pipe is provided with the through hole, the through hole can be used for the test liquid in the accommodation cavity to enter the connecting pipe, the outer surface of container is provided with at least one opening, the opening is communicated with one end of the connecting pipe, and the other end of the connecting pipe is communicated with the screen mesh. The screen is used for wrapping a sample to be tested, the screen can be placed into the connecting pipe from the opening, and the screen is in close fit connection with the connecting pipe, so that the screen and the sample to be tested can be prevented from floating upwards by means of close fit connection of the screen and the connecting pipe, and the test result is more accurate.

Description

Technical Field

[0001] This utility model relates to the field of crosslinking degree testing fixture technology, specifically to a lithium battery separator crosslinking degree testing fixture. Background Technology

[0002] Traditional lithium-ion battery separators are typically made of polyolefin, which generally has poor heat resistance. Therefore, cross-linking is often used to improve the heat resistance of the separator. A battery separator cross-linking degree testing fixture is a tool used to test the cross-linked ethylene plastic gel content of the battery separator. During the test, the operator lowers a sieve containing the sample to be tested into a flask using a thin thread, allowing the test solution in the flask to contact the sample for cross-linking degree testing. However, because the sieve and the sample float upwards during the test due to buoyancy, the test results are inaccurate. Utility Model Content

[0003] This invention addresses the shortcomings of existing technologies by providing a lithium battery separator crosslinking degree testing fixture. It utilizes a sieve and a connecting tube in a tight fit to prevent the sieve and the sample to be tested from floating, thus making the test results more accurate.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A lithium battery separator crosslinking degree testing fixture includes a container, a connecting tube, and a sieve. The container has a receiving cavity, and the connecting tube is disposed in the receiving cavity. The connecting tube has a through hole, which allows the test liquid in the receiving cavity to enter the connecting tube. The outer surface of the container has at least one opening, which communicates with one end of the connecting tube. The sieve is used to wrap the sample to be tested. The sieve can be inserted into the connecting tube through the opening, and the sieve can be tightly fitted to the connecting tube.

[0006] By setting up a container, a connecting tube, and a sieve, the connecting tube is placed in the accommodating cavity inside the container and has a through hole. The outer surface of the container has an opening that communicates with one end of the connecting tube. During testing, the sieve containing the sample to be tested is placed into the connecting tube through the opening and the sieve is tightly fitted to the connecting tube. The test liquid in the accommodating cavity enters the connecting tube through the through hole and immerses the sieve, allowing the test liquid to contact the sample to be tested for crosslinking degree testing. The tight fit between the sieve and the connecting tube prevents the sieve and the sample to be tested from floating, making the test results more accurate.

[0007] In one embodiment, the connecting pipe is an arc-shaped connecting pipe with a downwardly recessed middle section, and the through hole is located in the middle section of the arc-shaped connecting pipe.

[0008] In one embodiment, there are two openings, and the two openings are respectively connected to the two ends of the arc-shaped connecting pipe.

[0009] In one embodiment, the container is a three-necked bottle, the outer surface of which has a condenser tube and two extension tubes. The condenser tube is connected to the accommodating cavity, and the upper ends of the two extension tubes are provided with openings. The two ends of the arc-shaped connecting tube are respectively connected to the corresponding extension tubes.

[0010] In one embodiment, the container and the connecting tube are integrally formed from glass.

[0011] In one embodiment, the through-hole comprises a plurality of spaced mesh openings.

[0012] In one embodiment, the screen is a metal screen.

[0013] In one embodiment, the screen is a flexible screen.

[0014] In one embodiment, a push rod and a pull hook are also included. The push rod can push the sieve containing the sample to be tested from the opening into the connecting tube, and the pull hook can hook the sieve and pull the sieve out of the connecting tube.

[0015] In one embodiment, a heating jacket is also included, which is worn over the outside of the container during use.

[0016] Compared with the prior art, this utility model has significant advantages and beneficial effects. Specifically, by setting up a container, a connecting tube, and a sieve, the connecting tube is set in the accommodating cavity inside the container and has a through hole. The outer surface of the container has an opening that communicates with one end of the connecting tube. During testing, the sieve containing the sample to be tested is placed into the connecting tube through the opening and the sieve is tightly fitted to the connecting tube. The test liquid in the accommodating cavity enters the connecting tube through the through hole and immerses the sieve, allowing the test liquid to contact the sample to be tested for crosslinking degree testing. The tight fit between the sieve and the connecting tube can prevent the sieve and the sample to be tested from floating, making the test results more accurate.

[0017] To more clearly illustrate the structural features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments: Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the assembly structure of an embodiment of the present utility model;

[0019] Figure 2 This is a schematic diagram of the connecting pipe structure according to an embodiment of the present utility model;

[0020] Figure 3 This is a schematic diagram of the usage state of an embodiment of this utility model.

[0021] Explanation of reference numerals in the attached diagram:

[0022] 10-Container, 11-Cavity, 12-Opening, 13-Test liquid, 14-Extension tube, 15-Condenser tube, 20-Connecting tube, 21-Through hole, 22-Mesh, 30-Sieve, 40-Heating jacket. Detailed Implementation

[0023] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the position or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] like Figure 1-3 As shown, this utility model discloses a lithium battery separator crosslinking degree testing fixture, including a container 10, a connecting tube 20, and a sieve 30.

[0026] The container 10 has a receiving cavity 11, and the connecting tube 20 is disposed in the receiving cavity 11. The connecting tube 20 has a through hole 21, which allows the test liquid 13 in the receiving cavity 11 to enter the connecting tube 20. The outer surface of the container 10 has at least one opening 12, which is connected to one end of the connecting tube 20. The sieve 30 is used to wrap the sample to be tested. The sieve 30 can be inserted into the connecting tube 20 through the opening 12, and the outer wall of the sieve 30 can be tightly connected to the inner wall of the connecting tube 20. The test liquid 13 is decahydronaphthalene or xylene. The outer diameter of the sieve 30 is slightly larger than the inner diameter of the connecting tube 20. Specifically, the difference between the outer diameter of the sieve 30 and the inner diameter of the connecting tube 20 can be 0.1 mm to 0.2 mm.

[0027] This utility model also includes a push rod (not shown), a pull hook (not shown), and a heating sleeve 40. In use, the push rod can push the sieve 30 containing the sample to be tested from the opening 12 into the connecting tube 20, and the pull hook can hook the sieve 30 and pull it out of the connecting tube 20. The heating sleeve 40 is fitted over the outside of the container 10. By setting the push rod and the pull hook, the push rod can be used to easily push the sieve 30 into the connecting tube 20, and the pull hook can be used to easily pull the sieve 30 out of the connecting tube 20, making it convenient to use.

[0028] It should be noted that the push rod and the hook can be set as two separate tools, or they can be integrated into the same tool.

[0029] The connecting tube 20 is an arc-shaped connecting tube 20 with a downwardly recessed middle section. The through hole 21 is located in the middle section of the arc-shaped connecting tube 20, specifically, the through hole is located on the lower surface of the middle section of the arc-shaped connecting tube 20. By using the arc-shaped connecting tube 20, the sieve 30 containing the sample to be tested is placed in the recessed middle section of the arc-shaped connecting tube 20. The inner top wall of the arc-shaped connecting tube 20 abuts against the sieve 30, which can effectively prevent the sieve 30 from floating up, thus providing good practicality.

[0030] Two openings 12 are provided, and the two openings 12 are respectively connected to the two ends of the arc-shaped connecting tube 20. By providing two openings 12, the sieve 30 containing the sample to be tested can be put into the connecting tube 20 from either opening 12, which is convenient to use.

[0031] The container 10 is a three-necked bottle. The outer surface of the three-necked bottle has a condenser tube 15 and two extension tubes 14. The condenser tube 15 is connected to the accommodating cavity 11. The upper ends of the two extension tubes 14 are provided with the opening 12. The two ends of the arc-shaped connecting tube 20 are respectively connected to the corresponding extension tubes 14.

[0032] The container 10 and the connecting pipe 20 are integrally formed from glass.

[0033] The through-hole 21 includes a plurality of spaced mesh holes 22.

[0034] The screen 30 is a metal screen 30, specifically, the metal screen 30 can be formed from a corrosion-resistant metal material.

[0035] The screen 30 is a soft screen 30; by using a soft screen 30, the soft screen 30 is easy to push into or take out of the connecting pipe 20 due to its flexibility, and the soft screen 30 can also maintain a good tight fit between the outer wall of the soft screen 30 and the inner wall of the connecting pipe 20.

[0036] How to use this utility model:

[0037] First, push the sieve 30 containing the sample to be tested from one of the openings 12 into the recessed position in the middle of the arc-shaped connecting tube 20 using the push rod. After the sieve 30 remains stationary, remove the push rod.

[0038] Then, the test solution 13 is poured from the condenser tube 15 into the accommodating cavity 11. The test solution 13 flows from the mesh 22 into the arc-shaped connecting tube 20, so that the sieve 30 is completely immersed in the test solution 13. The test solution 13 comes into contact with the sample to be tested and dissolves the uncrosslinked part of the sample to be tested.

[0039] Then restart the heating jacket 40 to heat the container 10 for a certain period of time;

[0040] Finally, use the hook to grab the screen 30 and pull it out of the arc-shaped connecting pipe 20 to remove it.

[0041] In summary, this utility model, by setting up a container 10, a connecting tube 20, and a sieve 30, with the connecting tube 20 disposed in the accommodating cavity 11 within the container 10 and having a through hole 21, and the outer surface of the container 10 having an opening 12 communicating with one end of the connecting tube, allows the sieve 30 containing the sample to be tested to be placed into the connecting tube 20 through the opening 12 during testing, ensuring a tight fit between the sieve 30 and the connecting tube 20. The test liquid 13 in the accommodating cavity 11 enters the connecting tube 20 through the through hole 21, immersing the sieve 30 and allowing the test liquid to contact the sample for crosslinking degree testing. The tight fit between the sieve 30 and the connecting tube 20 prevents the sieve 30 and the sample from floating, resulting in more accurate test results.

[0042] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Therefore, any modifications, equivalent substitutions, improvements, etc., made to the above embodiments based on the actual technical aspects of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A test fixture for testing the crosslinking degree of a lithium battery separator, characterized in that, The container, the connecting pipe and the screen are included. The container has a containing cavity, the connecting pipe is arranged in the containing cavity, a through hole is arranged on the connecting pipe, the through hole is used for allowing the test liquid in the containing cavity to enter the connecting pipe, at least one opening is arranged on the outer surface of the container, the opening is communicated with one end of the connecting pipe, the screen is used for wrapping the sample to be tested, the screen can be put into the connecting pipe from the opening, and the screen can be tightly connected with the connecting pipe.

2. The lithium battery separator crosslinking degree test fixture of claim 1, wherein, The connecting pipe is an arc-shaped connecting pipe, the middle part of the arc-shaped connecting pipe is concave downward, and the through hole is arranged in the middle part of the arc-shaped connecting pipe. 3.The lithium battery separator crosslinking degree test fixture of claim 2, wherein, The opening is provided with two openings, and the two openings are respectively communicated with two ends of the arc-shaped connecting pipe. 4.The lithium battery separator crosslinking degree test fixture of claim 2, wherein, The container is a three-necked flask, the outer surface of the three-necked flask has a condenser pipe and two extension pipes, the condenser pipe is communicated with the containing cavity, the upper ends of the two extension pipes are respectively provided with the openings, and the two ends of the arc-shaped connecting pipe are respectively connected with the corresponding extension pipes. 5.The lithium battery separator crosslinking degree test fixture of claim 1, wherein, The container and the connecting pipe are integrally formed by glass material. 6.The lithium battery separator crosslinking degree test fixture of claim 1, wherein, The through hole includes a plurality of mesh holes which are spaced apart. 7.The lithium battery separator crosslinking degree test fixture of claim 1, wherein, The screen is a metal screen. 8.The lithium battery separator crosslinking degree test fixture of claim 1, wherein, The screen is a soft screen. 9.The lithium battery separator crosslinking degree test fixture of claim 1, wherein, A push rod and a pull hook are further included, the push rod can push the screen wrapped with the sample to be tested into the connecting pipe from the opening, and the pull hook can hook the screen and pull the screen out of the connecting pipe.

10. The lithium battery separator crosslinking degree test fixture according to any one of claims 1-9, wherein, A heating sleeve is further included, and the heating sleeve is sleeved on the outer side of the container during use.

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