CN208383582U - Test the infiltration type device of lithium ion battery separator hygrometric state puncture strength - Google Patents
Test the infiltration type device of lithium ion battery separator hygrometric state puncture strength Download PDFInfo
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- CN208383582U CN208383582U CN201821086315.2U CN201821086315U CN208383582U CN 208383582 U CN208383582 U CN 208383582U CN 201821086315 U CN201821086315 U CN 201821086315U CN 208383582 U CN208383582 U CN 208383582U
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- lithium ion
- ion battery
- fixed ring
- battery separator
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Abstract
The utility model discloses the infiltration type devices of the test lithium ion battery separator hygrometric state puncture strength designed based on common cupping machine, test the infiltration type device of lithium ion battery separator hygrometric state puncture strength, including cupping machine, puncture needle, fixture, the fixture includes compression ring and fixed ring, the compression ring is mounted on the fixed ring upper end, clamping between compression ring and fixed ring has MEMBRANEA sample, the stepped groove for loading electrolyte is equipped in fixed ring, the lower groove of MEMBRANEA sample covering stepped groove, and it is in contact below MEMBRANEA sample with electrolyte, the puncture needle is located above MEMBRANEA sample, and the push rod of puncture needle and cupping machine connects, piercing needle above cupping machine moves downward top thorn diaphragm with certain speed, the puncture strength of lithium ion battery separator can be tested out, for each cell production companies It selects to provide reliable basis when diaphragm.
Description
Technical field
The utility model relates to lithium ion battery separator performance test field, more particularly to test lithium ion battery separator are wet
The infiltration type device of state puncture strength.
Background technique
Diaphragm is one of the interior layer assembly of lithium ion battery key, primarily serves isolation positive and negative anodes and passes through lithium ion
Effect, the performance of diaphragm determine the interfacial structure of battery, internal resistance etc., directly affect capacity, circulation and the security performance of battery
Deng, so, the quality of membrane properties directly influences the comprehensive performance of lithium battery.
In lithium ion battery manufacture and assembling process, since there may be burrs for electrode edge, in addition technique and environment
The horizontal factors such as limited, in battery use process, inside battery may also form dendritic crystal, to pierce through diaphragm, cause office
The faint short circuit in portion, it is seen that diaphragm needs to have certain puncture strength.
A complete lithium ion battery includes positive and negative electrode, diaphragm and electrolyte, so research diaphragm is in the electrolytic solution
Puncture strength is also necessary.Existing diaphragm puncture strength test fixture is only limitted to the test under dry state.
Utility model content
The purpose of this utility model is to overcome above the shortcomings of the prior art, provide test lithium ion battery
The infiltration type device of the infiltration type device of diaphragm hygrometric state puncture strength, this test lithium ion battery separator hygrometric state puncture strength can be surveyed
The puncture strength of diaphragm in the electrolytic solution is tried, and the puncture strength being suitable under the diaphragm hygrometric state of different size, different materials is surveyed
Examination.
The purpose of this utility model is realized by the following technical solution: test lithium ion battery separator hygrometric state puncture strength
Infiltration type device, including cupping machine, puncture needle and fixture, the fixture include compression ring and fixed ring, the compression
Ring is mounted on the fixed ring upper end, and clamping has MEMBRANEA sample between the compression ring and fixed ring, sets in the fixed ring
Have load electrolyte groove, and the MEMBRANEA sample covering stepped groove lower groove, and below MEMBRANEA sample with electrolyte
It is in contact, the puncture needle is located above MEMBRANEA sample, and the push rod of the puncture needle and cupping machine connects.
Preferably, the fixed ring further includes annular portion and mounting portion, and the upper end of the annular portion and mounting portion connects, and
The annular portion and mounting portion are integrally formed.
Preferably, the section of the mounting portion is T-shaped；When performing a test, the mounting portion is installed on the stretching examination
It tests on the carrying platform of machine, can be stably connected with, guarantee that site of puncture is the center of lithium ion battery separator sample, it is ensured that
The accuracy and reliability of data.
Preferably, the groove includes upper annular groove and lower groove, and the upper annular groove is communicated with lower groove, described in face on
Annular groove and lower groove are located at annular portion and mounting portion, while the diameter of the upper annular groove is greater than the diameter of lower groove.
Preferably, it is connected between the fixed ring and compression ring by bolt assembly, there are gap between screw bolt and nut,
Gauffer is generated when can prevent MEMBRANEA sample from installing, guarantees the smooth of diaphragm.
Preferably, the syringe needle of the puncture needle is in spherical, and syringe needle is round and smooth and impulse- free robustness, can ensure the accuracy of experiment.
Preferably, the main diameter of the puncture needle is 0.8-1.2mm, and the needle tip of puncture needle is hemispherical, this wears
The needle tip radius of pricker is the hemispherical of 0.3-0.5mm.
Preferably, the surface of the fixed ring and compression ring is flat and smooth, and the surface of the fixed ring and compression ring
Roughness is Ra < 1.0, can prevent from generating electrostatic influence test result due to fixed ring rough surface.
The method of infiltration type device based on above-mentioned test lithium ion battery separator hygrometric state puncture strength, including following step
It is rapid:
1) MEMBRANEA sample of lithium ion battery is cut to the size to match with suitable fixed ring；
2) by the mounting portion clamping of fixed ring on the carrying platform of cupping machine lower end, electrolyte is filled to groove；
3) fit closely MEMBRANEA sample with fixed ring with compression ring in fixed ring the smooth laying of MEMBRANEA sample, and
Compression ring and fixed ring are fixed using bolt assembly；
4) test parameter of cupping machine is set, puncture speed is (50 ± 5) mm/min, and setting displacement is 10-50mm,
Make puncture needle at the uniform velocity glide downwards, diaphragm is pierced through；
5) peak load that puncture needle penetrates MEMBRANEA sample, as diaphragm puncture intensity are read.
Preferably, the method for the infiltration type device based on above-mentioned test lithium ion battery separator hygrometric state puncture strength is also wrapped
Step 6) is included, step 1)~5 are repeated) at least 5 times, then calculate the average value of so multiple diaphragm puncture intensity data.
The utility model has the advantage that compared with the existing technology
1. the present apparatus can test lithium ion battery separator in electrolyte (such as lithium hexafluoro phosphate and ethylene carbonate and carbonic acid
The mixed liquor of dimethyl ester) in puncture strength, suitable for different size, different materials diaphragm hygrometric state under puncture strength survey
Examination.
2. experimental method can provide clearly reliable foundation for cell production companies and diaphragm demander.
Detailed description of the invention
Fig. 1 is the installation diagram of the infiltration type device of the utility model.
Fig. 2 is the puncture needle of the utility model.
Fig. 3 is the fixed ring of the utility model.
Wherein, 1 is cupping machine, and 2 be puncture needle, and 3 be MEMBRANEA sample, and 4 be bolt assembly, and 5 be compression ring, and 6 be solid
Determine ring, 61 be groove, and 62 be annular portion, and 63 be mounting portion, and 64 be upper annular groove, and 65 be lower groove, and 7 be fixture
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and examples:
The infiltration type device of test lithium ion battery separator hygrometric state puncture strength as shown in Figure 1:, including cupping machine 1,
Puncture needle 2 and fixture 7, the fixture 7 include compression ring 5 and fixed ring 6, and the compression ring 5 is mounted in the fixed ring 6
End, and clamping has MEMBRANEA sample 3 between the compression ring 5 and fixed ring 6, is equipped with the groove 61 for loading electrolyte in fixed ring 6,
MEMBRANEA sample 3 covers groove, and is in contact below the MEMBRANEA sample 3 with electrolyte, and the puncture needle 2 is located at MEMBRANEA sample
3 tops, and the puncture needle 2 is connect with the push rod of cupping machine 1.
As shown in figure 3, the fixed ring 6 further includes annular portion 62 and mounting portion 63, the annular portion and mounting portion it is upper
End connection, and the annular portion and mounting portion are integrally formed.
As shown in Figure 1, Figure 3,62 section of mounting portion is T-shaped, is mounted on the carrying platform of the sample machine 1, can
To be stably connected with, guarantee that site of puncture is the center of lithium ion battery separator sample, it is ensured that the accuracy of data and reliable
Property.
As shown in figure 3, the groove 61 includes upper annular groove and lower groove, the upper annular groove 64 and 65 phase of lower groove
It is logical, upper annular groove 64 and lower groove point 65 described in face not Wei Yu annular portion and mounting portion, while the diameter of the upper annular groove 64
Greater than the diameter of lower groove 65.
As shown in Figure 1, being connected between the fixed ring 6 and compression ring 5 by bolt assembly 5, stayed between screw bolt and nut
There is gap, generate gauffer when can prevent MEMBRANEA sample from installing, guarantees the smooth of diaphragm.
As shown in Fig. 2, the syringe needle 21 of the puncture needle 2 is in spherical, syringe needle is round and smooth and impulse- free robustness, can ensure the accurate of experiment
Property.
As shown in Fig. 2, the main diameter of the puncture needle 2 is 0.8-1.2mm, the needle tip of puncture needle is hemispherical,
The needle tip radius of this puncture needle is the hemispherical of 0.3-0.5mm.
The surface of the fixed ring 6 and compression ring 5 is flat and smooth, and the rough surface of the fixed ring 6 and compression ring 5
Degree is Ra < 1.0, can prevent from generating electrostatic influence test result due to fixed ring rough surface.
The method of infiltration type device based on above-mentioned test lithium ion battery separator hygrometric state puncture strength, including following step
It is rapid:
1) by the MEMBRANEA sample of lithium ion battery 3, to be cut into diameter be 100mm is disk；
2) by the mounting portion clamping of fixed ring 6 on the carrying platform of 2 lower end of cupping machine, lithium is filled to stepped groove 61
Battery electrolyte (such as mitigation mixed solution of lithium hexafluoro phosphate and ethylene carbonate and dimethyl carbonate)；
3) paste MEMBRANEA sample 3 and fixed ring 6 closely with compression ring 5 in fixed ring 6 the smooth laying of MEMBRANEA sample 3
It closes, and is fixed compression ring and fixed ring using bolt assembly.
4) test parameter of cupping machine 1 is set, and puncture speed is (50 ± 5) mm/min, and setting displacement is 10-
50mm makes the at the uniform velocity glide downwards of puncture needle 2, diaphragm is pierced through；
5) peak load that puncture needle 2 penetrates MEMBRANEA sample, as diaphragm puncture intensity are read.
The method of infiltration type device based on above-mentioned test lithium ion battery separator hygrometric state puncture strength further includes step
6) step 1)~5, are repeated) at least 5 times, it removes maximum value and minimum value, the puncture for taking arithmetic average final as sample is strong
Degree evidence can make test data more accurate.
Above-mentioned specific embodiment is the preferred embodiment of the utility model, can not be defined to the utility model,
Other any changes made without departing from the technical solution of the utility model or other equivalent substitute modes, are included in
Within the protection scope of the utility model.
Claims (8)
1. testing the infiltration type device of lithium ion battery separator hygrometric state puncture strength, which is characterized in that including cupping machine, wear
Pricker and fixture, the fixture include compression ring and fixed ring, and the compression ring is mounted on the fixed ring upper end, and the pressure
Clamping between tight ring and fixed ring has MEMBRANEA sample, and the groove for loading electrolyte, the MEMBRANEA sample are equipped in the fixed ring
Groove is covered, and is in contact below the MEMBRANEA sample with electrolyte, the puncture needle is located above MEMBRANEA sample, and described
The connection of the push rod of puncture needle and cupping machine.
2. the infiltration type device of test lithium ion battery separator hygrometric state puncture strength according to claim 1, feature exist
Further include annular portion and mounting portion in, the fixed ring, the upper end of the annular portion and mounting portion connects, and the annular portion with
Mounting portion is integrally formed.
3. the infiltration type device of test lithium ion battery separator hygrometric state puncture strength according to claim 2, feature exist
In the section of the mounting portion is T-shaped；When performing a test, the carrying that the mounting portion is installed on the cupping machine is put down
On platform.
4. the infiltration type device of test lithium ion battery separator hygrometric state puncture strength according to claim 2, feature exist
In the groove includes upper annular groove and lower groove, and the upper annular groove is communicated with lower groove, upper annular groove described in face and recessed
Slot is located at annular portion and mounting portion, while the diameter of the upper annular groove is greater than the diameter of lower groove.
5. the infiltration type device of test lithium ion battery separator hygrometric state puncture strength according to claim 1, feature exist
In, between the fixed ring and compression ring pass through bolt assembly connect.
6. the infiltration type device of lithium ion battery separator hygrometric state puncture strength according to claim 1, which is characterized in that institute
The syringe needle of puncture needle is stated in spherical.
7. the infiltration type device of test lithium ion battery separator hygrometric state puncture strength according to claim 6, feature exist
In the main diameter of the puncture needle is 0.8-1.2mm, and the needle tip of puncture needle is hemispherical, the syringe needle top of this puncture needle
Holding radius is the hemispherical of 0.3-0.5mm.
8. the infiltration type device of test lithium ion battery separator hygrometric state puncture strength according to claim 1, feature exist
In, the surface of the fixed ring and compression ring is flat and smooth, and the fixed ring and the surface roughness of compression ring be Ra <
1.0。
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| CN201821086315.2U CN208383582U (en) | 2018-07-10 | 2018-07-10 | Test the infiltration type device of lithium ion battery separator hygrometric state puncture strength |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109030173A (en) * | 2018-07-10 | 2018-12-18 | 华南理工大学 | Test the infiltration type device and method of lithium ion battery separator hygrometric state puncture strength |
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2018
- 2018-07-10 CN CN201821086315.2U patent/CN208383582U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109030173A (en) * | 2018-07-10 | 2018-12-18 | 华南理工大学 | Test the infiltration type device and method of lithium ion battery separator hygrometric state puncture strength |
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