CN219641509U - Diaphragm wetting rate testing arrangement - Google Patents
Diaphragm wetting rate testing arrangement Download PDFInfo
- Publication number
- CN219641509U CN219641509U CN202320280152.6U CN202320280152U CN219641509U CN 219641509 U CN219641509 U CN 219641509U CN 202320280152 U CN202320280152 U CN 202320280152U CN 219641509 U CN219641509 U CN 219641509U
- Authority
- CN
- China
- Prior art keywords
- diaphragm
- fixer
- tested
- wetting rate
- box body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 83
- 238000009736 wetting Methods 0.000 title claims abstract description 22
- 239000007788 liquid Substances 0.000 claims abstract description 26
- 238000005452 bending Methods 0.000 abstract description 4
- 230000005489 elastic deformation Effects 0.000 abstract description 3
- 239000003792 electrolyte Substances 0.000 description 33
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 238000009792 diffusion process Methods 0.000 description 6
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000003028 elevating effect Effects 0.000 description 4
- 239000012528 membrane Substances 0.000 description 4
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 229910013870 LiPF 6 Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000007773 negative electrode material Substances 0.000 description 2
- 239000007774 positive electrode material Substances 0.000 description 2
- 150000001450 anions Chemical class 0.000 description 1
- 239000010405 anode material Substances 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000010406 cathode material Substances 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- -1 lithium hexafluorophosphate Chemical compound 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model relates to a diaphragm wetting rate testing device which comprises a bottom plate (9), a graduated scale (2), a testing box body (4), a right supporting table (6), a diaphragm to be tested (8), a fixed pulley (11) and a torque motor (12), wherein a diaphragm left fixer (1) and a diaphragm right fixer (5) are respectively arranged on the left side and the right side of the testing box body (4), a drip limiter (3) is arranged between the diaphragm left fixer (1) and the diaphragm right fixer (5), a liquid adding device (7) is arranged on the drip limiter (3), the graduated scale (2) is parallel to the diaphragm to be tested (8), and a traction rope (10) is arranged on the right side of the diaphragm right fixer (5). The utility model can avoid the fold and bending of the diaphragm to be tested, and ensure the consistency of the tensile force and the consistency of the elastic deformation of the diaphragm in different tests, thereby improving the test precision.
Description
Technical Field
The utility model relates to the technical field of energy storage device production, in particular to a diaphragm wetting rate testing device for a lithium ion battery.
Background
The lithium ion battery mainly comprises anode and cathode materials, a diaphragm, electrolyte, a shell and other materials, wherein the diaphragm is responsible for separating the anode from the cathode, and the electrolyte plays a role in transporting anions and cations. The wettability of the electrolyte to the separator and the positive and negative electrode active materials is related to the battery performance and the manufacturing cost, wherein the wettability to the separator is generally smaller than that of the positive and negative electrode active materials, so the wettability of the electrolyte to the separator is a key index for measuring the wettability of the electrolyte.
Patent CN215179417U discloses a diaphragm wettability testing arrangement, including test jig and scale, be equipped with left clamping piece and the right clamping piece that is used for the centre gripping to await measuring the diaphragm left and right ends on the test jig, the below between left clamping piece and the right clamping piece is equipped with the electrolyte container that is used for holding the electrolyte, be equipped with the elevating platform that is used for bearing the electrolyte container on the test jig and the lift actuating mechanism of control elevating platform up-and-down activity, be equipped with the capillary that makes the electrolyte upwards permeate on the electrolyte container, the surface of reagent bottle is equipped with annotates the liquid mouth, during the test, the both ends centre gripping is in between left clamping piece and right clamping piece about the diaphragm that awaits measuring, the lower extreme of capillary is immersed in the electrolyte, the upper end of capillary and the lower surface contact of awaiting measuring the diaphragm, the scale transversely locates one side of awaiting measuring the diaphragm. The transverse diffusion speed of the electrolyte can be more uniform in the testing process, the influence of gravity on the diffusion of the electrolyte on the diaphragm is avoided, but the testing result of the device is greatly influenced by the surface tension of the electrolyte and the radius of the capillary, so that the testing precision is not high enough.
Patent CN112858103a discloses a testing device and a testing method for wettability of a lithium ion battery diaphragm, the testing device comprises a sealed shell, a scale is arranged in the sealed shell, a water tank filled with a impregnating solution is arranged on the scale, and a heater is arranged in the water tank; the water tank top is provided with elevating gear, elevating gear is used for carrying the thing of awaiting measuring, still be provided with the watch-dog in the sealed casing, the watch-dog is used for observing the interior situation of sealed casing. The testing method can realize wettability measurement at different temperatures and pressures, but the testing result can be greatly influenced if the diaphragm is curled in the testing process, and the testing precision error is larger.
The existing testing device is complex in structure, the diaphragm cannot be fully stretched or the tension applied to the diaphragm cannot be determined, the deformation condition of the diaphragm is unknown, the repeatability of a testing result is poor, the precision error is large, and the testing effect is not ideal.
Disclosure of Invention
Aiming at the problems existing in the prior art, the utility model provides the diaphragm wetting rate testing device, which can ensure that the diaphragm is completely stretched and the tensile force applied to different diaphragms is basically consistent when different diaphragms are tested, the testing result is less influenced by the bending and deformation of the diaphragm, the electrolyte is more uniformly diffused, the testing precision is higher, and the effect is better.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a diaphragm wetting rate testing arrangement, includes bottom plate (9), scale (2), test box body (4), right branch brace table (6), diaphragm (8) to be tested, fixed pulley (11) and torque motor (12), test box body (4) left and right sides is equipped with diaphragm left side fixer (1) and diaphragm right side fixer (5) respectively, be equipped with dropping liquid stopper (3) between diaphragm left side fixer (1) and diaphragm right side fixer (5), be equipped with liquid feeding device (7) on dropping liquid stopper (3), scale (2) are parallel with diaphragm (8) to be tested, diaphragm right side fixer (5) right side is equipped with haulage rope (10).
During testing, the left end and the right end of the diaphragm (8) to be tested are respectively fixed on the left diaphragm fixer (1) and the right diaphragm fixer (5), and the left diaphragm fixer (1) and the right diaphragm fixer (5) are respectively provided with alignment marks for guaranteeing alignment of the two ends of the diaphragm (8) to be tested, the left diaphragm fixer (1) is fixed on the left side of the test box body (4), and the right diaphragm fixer (5) can move left and right on the test box body (4) and the right fixer supporting table (6) under the action of the torque motor (12) through the traction rope (10).
As a preferable scheme, the center positions of the left diaphragm fixer (1), the drip limiter (3), the right diaphragm fixer (5) and the fixed pulley (11) are positioned on the same horizontal line.
As a preferable scheme, the left diaphragm fixer (1) and the right diaphragm fixer (5) are fixing clamps.
As a preferable scheme, the drip limiter (3) is used for limiting the drip position, can move left and right on the test box body (4) and can measure the diaphragm (8) to be tested for a plurality of times; the liquid adding device (7) is a liquid transferring gun, a liquid injector or a capillary tube. The height of the lower end of the liquid adding device from the diaphragm to be measured is 0.5-5 mm.
As a preferable scheme, the torque motor (12) controls the tensile force of the diaphragm (8) to be tested by adjusting voltage, and the tensile force of the diaphragm to be tested is the same.
Compared with the prior art, the utility model has the following beneficial effects:
1. the utility model can ensure that the diaphragm to be tested is fully stretched and the tensile forces born by the diaphragm are basically consistent in different tests, the test result is less influenced by the bending and deformation of the diaphragm, and the test precision and the test effect are ensured;
2. the drip limiter ensures that the liquid adding position and the height are basically consistent during each test, so that the electrolyte can be uniformly diffused on the diaphragm, the test precision is higher, and the effect is better;
3. the utility model has simple structure, reasonable arrangement and high test precision, and is beneficial to popularization.
Drawings
FIG. 1 is a schematic diagram of a membrane wetting rate testing device according to an embodiment of the utility model.
Detailed Description
The utility model will be further illustrated with reference to the following specific examples, without limiting the utility model to these specific embodiments. It should be noted that several similar variations and modifications could be made by those skilled in the art without departing from the inventive concept, which are also considered to be within the scope of the present utility model.
As shown in fig. 1, the diaphragm wetting rate testing device comprises a bottom plate (9), a graduated scale (2), a testing box body (4), a right supporting table (6), a diaphragm to be tested (8), a fixed pulley (11) and a torque motor (12), wherein a diaphragm left fixer (1) and a diaphragm right fixer (5) are respectively arranged on the left side and the right side of the testing box body (4), a liquid dropping limiter (3) is arranged between the diaphragm left fixer (1) and the diaphragm right fixer (5), a liquid adding device (7) is arranged on the liquid dropping limiter (3), the graduated scale (2) is parallel to the diaphragm to be tested (8), and a traction rope (10) is arranged on the right side of the diaphragm right fixer (5).
During testing, the left end and the right end of the diaphragm (8) to be tested are respectively fixed on the left diaphragm fixer (1) and the right diaphragm fixer (5), and the left diaphragm fixer (1) and the right diaphragm fixer (5) are respectively provided with alignment marks for guaranteeing alignment of the two ends of the diaphragm (8) to be tested, the left diaphragm fixer (1) is fixed on the left side of the test box body (4), and the right diaphragm fixer (5) can move left and right on the test box body (4) and the right fixer supporting table (6) under the action of the torque motor (12) through the traction rope (10). The center positions of the left diaphragm fixer (1), the drip limiter (3), the right diaphragm fixer (5) and the fixed pulley (11) are positioned on the same horizontal straight line.
According to the utility model, the torque motor (12) controls the tensile force of the diaphragm (8) to be tested by adjusting the voltage, so that the tensile force of the diaphragm to be tested is the same, specifically, in each measurement, the tensile force is controlled, so that the stress coefficient k values of the diaphragm to be tested are the same, and the consistency of deformation of the diaphragm to be tested is ensured.
The method for calculating the k value of the stress coefficient of the diaphragm comprises the following steps: according to the formulaCalculating a stress coefficient k value of the diaphragm;
k: the diaphragm stress coefficient per unit area; f: the tension provided by the moment motor is N;
x: the distance between the left diaphragm holder and the right diaphragm holder is mm; d: the width of the diaphragm to be measured is mm.
The utility model relates to a method for testing wettability of a diaphragm, which specifically comprises the following steps:
A1. firstly, a diaphragm left fixer (1) and a diaphragm right fixer (5) are adopted to fix the left end and the right end of a diaphragm (8) to be tested, a moment motor (12) is started, the diaphragm right fixer (5) is pulled to move rightwards through a traction rope (10), and a tensile force F is controlled to enable the diaphragm (8) to be tested to generate certain elastic deformation until the diaphragm (8) to be tested is completely stretched;
A2. an electrolyte is dripped onto the surface of a diaphragm (8) to be detected through a liquid adding device (7) on a drip limiter (3), and the diffusion distance of the electrolyte on the diaphragm in unit time t after the electrolyte is dripped is recorded;
A3. wetting rate determination: by the formulaCalculating to obtain the wetting rate V of the electrolyte to the diaphragm (8) to be tested;
t: diffusion time of electrolyte on the membrane, s; the maximum diffusion diameter of electrolyte on the diaphragm is mm; d: the width of the diaphragm to be measured is mm.
The larger the wetting rate V of the diaphragm (8) to be measured is, the better the wettability of the electrolyte to the diaphragm (8) to be measured is, and the worse the wettability is on the contrary.
Example 1
(1) And (3) preparing a basic electrolyte: in a glove box filled with argon (moisture < 5ppm, oxygen content < 10 ppm), ethylene Carbonate (EC) and ethylmethyl carbonate (EMC) were mixed in mass ratio EC: emc=3:7 was uniformly mixed, and lithium hexafluorophosphate (LiPF 6 ) To LiPF 6 Molar concentration of (2)The degree was 1.0mol/L, to obtain a base electrolyte 1.
(2) Diaphragm wet rate determination:
A1. the diaphragms with the width of 3mm and the length of 200mm are respectively fixed on left and right diaphragm holders of the testing device, a torque motor is started, and the output tension is adjusted to ensure that the stress coefficient k of the diaphragms is 0.02N/mm 2 ；
A2. Dropwise adding 30uL of the basic electrolyte 1 onto a diaphragm through a liquid adding device by adopting a liquid transferring gun, and recording the diffusion distance L of the electrolyte on the diaphragm after 20 seconds;
A3. wetting rate determination: calculating the wetting rate V of the electrolyte to the diaphragm, wherein the test result is recorded as 1, and the specific table 1 shows;
the drip stop was moved 80mm to the left and the operations A2 and A3 were repeated, the test results were recorded as 2, and the results are shown in Table 1;
the diaphragm was replaced, the operations A1 to A3 were repeated, and the test result was recorded as 3, and the results are shown in Table 1.
Example 2
(1) And (3) preparing a basic electrolyte: the operation is identical to example 1, except that: the Ethylene Carbonate (EC) and the methyl ethyl carbonate (EMC) are mixed according to the mass ratio of EC: emc=3:7 was uniformly mixed, and the other operations were unchanged, to obtain a base electrolyte 2.
(2) Diaphragm wet rate determination: the procedure is as in example 1, and the test results are recorded as 4 and are shown in Table 1;
the operations A2 and A3 of example 1 were repeated by moving the drip stop 80mm to the left, and the test results were recorded as 5, as shown in Table 1;
the operations A1 to A3 of example 1 were repeated with the diaphragm replaced, and the test results were recorded as 6, and are specifically shown in Table 1.
The membranes tested in example 1 and example 2 were both identical batches of membranes.
Table 1 test results of example 1 and example 2
By testing the wettability of the separator by two different solvent system electrolytes, it can be found that the wetting effect of EC/EMC/dmc=2/1/7 is significantly better than EC/emc=3/7; the reproducibility of the test result is better and the test precision is higher after the same electrolyte sample is repeatedly tested.
In summary, the diaphragm to be tested is fixed by the left and right diaphragm holders, the right diaphragm holder is pulled to move by the torque motor, so that the diaphragm to be tested is uniformly stressed and is subjected to certain elastic deformation, the diaphragm to be tested is fully stretched, the same tensile force of different test diaphragms is ensured by controlling the voltage of the torque motor, the diaphragm to be tested is fully stretched and the tensile forces of the diaphragms in different tests are basically consistent, the influence of the bending and deformation of the diaphragm on the test result is less, and the test precision and the test effect are ensured; and the height and the position of the dripping liquid are controlled by the dripping limiter, so that the liquid adding position and the height are basically consistent during each test, the electrolyte can be uniformly diffused on the diaphragm, and the influence of factors such as the liquid adding height and the position on the test precision is effectively avoided. In addition, the utility model has simple structure, reasonable arrangement and high test precision, and is beneficial to popularization.
Claims (7)
1. A device for testing the wetting rate of a diaphragm, characterized by: the diaphragm wetting rate testing device comprises a bottom plate (9), a graduated scale (2), a testing box body (4), a right supporting table (6), a diaphragm (8) to be tested, a fixed pulley (11) and a torque motor (12), wherein a diaphragm left fixer (1) and a diaphragm right fixer (5) are respectively arranged on the left side and the right side of the testing box body (4), a liquid dropping limiter (3) is arranged between the diaphragm left fixer (1) and the diaphragm right fixer (5), a liquid adding device (7) is arranged on the liquid dropping limiter (3), the graduated scale (2) is parallel to the diaphragm (8) to be tested, and a traction rope (10) is arranged on the right side of the diaphragm right fixer (5).
2. The separator wetting rate testing device according to claim 1, wherein: during testing, the left end and the right end of the diaphragm (8) to be tested are respectively fixed on the left diaphragm fixer (1) and the right diaphragm fixer (5), and the left diaphragm fixer (1) and the right diaphragm fixer (5) are respectively provided with alignment marks for guaranteeing alignment of the two ends of the diaphragm (8) to be tested, the left diaphragm fixer (1) is fixed on the left side of the test box body (4), and the right diaphragm fixer (5) can move left and right on the test box body (4) and the right fixer supporting table (6) under the action of the torque motor (12) through the traction rope (10).
3. The separator wetting rate testing device according to claim 2, wherein: the left diaphragm fixer (1) and the right diaphragm fixer (5) are fixing clamps.
4. The separator wetting rate testing device according to claim 1, wherein: the liquid adding device (7) is a liquid transferring gun, a liquid injector or a capillary tube.
5. The separator wetting rate testing device according to claim 1, wherein: the height of the lower end of the liquid adding device from the diaphragm to be measured is 0.5-5 mm.
6. The separator wetting rate testing device according to claim 1, wherein: the center positions of the left diaphragm fixer (1), the drip limiter (3), the right diaphragm fixer (5) and the fixed pulley (11) are positioned on the same horizontal straight line.
7. The separator wetting rate testing device according to claim 1, wherein: the torque motor (12) adjusts the tensile force of the diaphragm (8) to be tested through voltage, so that the tensile force of the diaphragm to be tested is the same.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320280152.6U CN219641509U (en) | 2023-02-22 | 2023-02-22 | Diaphragm wetting rate testing arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320280152.6U CN219641509U (en) | 2023-02-22 | 2023-02-22 | Diaphragm wetting rate testing arrangement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219641509U true CN219641509U (en) | 2023-09-05 |
Family
ID=87820139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320280152.6U Active CN219641509U (en) | 2023-02-22 | 2023-02-22 | Diaphragm wetting rate testing arrangement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219641509U (en) |
-
2023
- 2023-02-22 CN CN202320280152.6U patent/CN219641509U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107748132B (en) | Method and device for testing grid corrosion in high-temperature environment | |
| CN111721674A (en) | Testing method and testing device for pole piece infiltration state | |
| CN219641509U (en) | Diaphragm wetting rate testing arrangement | |
| CN110672470B (en) | Pole piece infiltration testing method and device of secondary battery | |
| CN111060434B (en) | Device and method for detecting liquid retention and gas diffusion performance of AGM separator | |
| CN112461714A (en) | Method for detecting infiltration rate of battery coating | |
| CN112179807B (en) | Method for accurately measuring gas yield of silicon cathode of lithium ion battery | |
| CN110133093B (en) | Comprehensive tester for working performance of porous electrode, testing method and application | |
| CN111965023A (en) | Tensile property testing method for proton exchange membranes with different humidity | |
| CN108666502B (en) | Preparation method of hydrophilic heat-resistant lithium battery diaphragm | |
| CN113075094A (en) | Diaphragm wettability testing device and testing method thereof | |
| CN109762113B (en) | Method for rapidly preparing high-quality acrylamide gel film | |
| CN218297934U (en) | System for detecting electrolyte wettability of storage battery | |
| CN112415062A (en) | Electrode system for rapidly detecting ethanol and method for detecting ethanol by using electrode system | |
| CN218727867U (en) | Online quantitative testing device for gas production of soft package battery | |
| CN114088519B (en) | Device and method for testing wet rebound ability of AGM separator under different compression amounts | |
| CN115585735B (en) | Detection device and detection method for microporous coating of membrane electrode gas diffusion layer | |
| CN112461713A (en) | Device and method for testing wettability of lithium ion battery diaphragm | |
| CN213181951U (en) | Lithium battery SOC detection device | |
| CN213181124U (en) | Testing arrangement of lithium cell imbibition rate | |
| CN212321499U (en) | PH meter that facilitates use | |
| CN112129671B (en) | Method for measuring hydrogen diffusion coefficient of solid steel at high temperature | |
| CN214041043U (en) | Device for detecting infiltration rate of battery coating | |
| CN112886107A (en) | Optimized button cell assembling method | |
| CN112179801A (en) | Testing device and testing method for liquid absorption rate of lithium battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A diaphragm wetting rate testing device Granted publication date: 20230905 Pledgee: Industrial and Commercial Bank of China Limited Hangzhou Zhaohui sub branch Pledgor: SINOCHEM LANTIAN Co.,Ltd. Registration number: Y2024330001056 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |