CN101655363A - Method for testing size changing rate of battery diaphragm - Google Patents
Method for testing size changing rate of battery diaphragm Download PDFInfo
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- CN101655363A CN101655363A CN200910192073A CN200910192073A CN101655363A CN 101655363 A CN101655363 A CN 101655363A CN 200910192073 A CN200910192073 A CN 200910192073A CN 200910192073 A CN200910192073 A CN 200910192073A CN 101655363 A CN101655363 A CN 101655363A
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- China
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- sample
- changing rate
- size
- size changing
- testing
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- 238000012360 testing method Methods 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 9
- 230000006978 adaptation Effects 0.000 claims abstract description 5
- 238000005259 measurement Methods 0.000 claims description 8
- 238000010998 test method Methods 0.000 claims description 8
- 241000272165 Charadriidae Species 0.000 claims description 4
- 230000001737 promoting effect Effects 0.000 claims description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 abstract description 4
- 229910001416 lithium ion Inorganic materials 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 description 3
- 241000156302 Porcine hemagglutinating encephalomyelitis virus Species 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
-
- 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
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Secondary Cells (AREA)
Abstract
The invention aims at providing a method for testing a size changing rate of a battery diaphragm, which can conveniently, quickly and accurately measure the size changing rate of the battery diaphragmand ensure the use safety of a lithium ion battery. The method comprises the following steps: A. intercepting a sample on a diaphragm material to be tested; B. cutting the sample according to a scheduled shape; C. testing the original size of the sample under the condition of the initial environment, and recording the original size; D. testing the scheduled time of the sample which is placed in atest environment; E. taking the sample out of the test environment, carrying out climate adaptation treatment, and measuring a final size; and F. calculating the size changing rate according to the original size and the final size of the tested sample. The method for testing the size changing rate of the battery diaphragm has simple steps and low test condition requirements, can conveniently andquickly test the size changing rate of the battery diaphragm by a comparison test of two environments; in addition, the method adopts a plurality of measures to reduce measuring errors and ensure theaccuracy of test data.
Description
Technical field
The invention belongs to PHEV manufacturing technology field, specially refer to the measuring technology of the used lithium ion battery separator of PHEV.
Background technology
The topmost function of lithium ion battery separator is to stop the direct electronics contact of positive and negative electrode in battery, guarantees that ion can freely pass through.Because battery diaphragm is a macromolecular material, in process, the molecule of long-chain is stretched and freezes, after the energy of activation of molecule improves, make segment that curling to a certain degree be arranged, thereby make the size of goods that to a certain degree variation take place, represent (also being the dimensional contraction rate) with size changing rate usually.The size changing rate of battery diaphragm is excessive, can cause membrane ruptures or electrode exposed, thereby causes the internal short-circuit of battery phenomenon to take place.Therefore before battery diaphragm is applied to product, must accurately measure its size changing rate, prevent that above-mentioned situation from taking place.Also there is not at present ripe method of testing to utilize.
Summary of the invention
The objective of the invention is to propose a kind of method of testing of size changing rate of battery diaphragm, with convenient, fast, measure the size changing rate of battery diaphragm exactly, guarantee the safe in utilization of lithium ion battery.
The method of testing key of size changing rate of battery diaphragm of the present invention is to comprise the steps:
A: on diaphragm material to be measured, intercept sample;
B: press reservation shape cutting sample;
C: the original size of test sample and record under the initial environment condition;
D: sample is placed the schedule time test under test environment;
E: sample is taken out from test environment, and the promoting the circulation of qi of going forward side by side is waited to adapt to and is handled, and measures its final size then;
F: calculate its size changing rate according to sample original size that records and final size.
Be the planarization of assurance sample, and then guarantee the accuracy of test, in the above-mentioned A step, should be from the planimetric position intercepting sample of diaphragm material to be measured.
For making things convenient for choosing and calculating of follow-up test direction, the reservation shape described in the above-mentioned B step is preferably rectangle or circle.
For the material character that guarantees sample is stablized, and then guarantee that the measurement of its original size is accurate, in above-mentioned C step, preferably sample is tested more than 24 hours in placement under the initial environment condition again.
Texturized under test environment for preventing sample, influence follow-up measurement, preferably sample is lain on the stilt in the above-mentioned D step, and then under test environment, place the schedule time and test.
In the above-mentioned E step, described climatic adaptation is treated at 23 ℃～40 ℃ and placed at least 30 minutes down, can guarantee that like this sample takes out its material character of back and tends towards stability from test environment, reduces measuring error.
In the above-mentioned F step, the computing formula of size changing rate is as follows: S=100* (L
0-L
1)/L
0, L wherein
0Be the initial length of sample at measurement direction, L
1Be the final lengths of sample at measurement direction, S is the size changing rate of sample at measurement direction, and its unit is %.
The method of testing step of size changing rate of battery diaphragm of the present invention is simple, test condition requires low, by the contrast test under two environment, can record the size changing rate of battery diaphragm quickly and easily, method of testing of the present invention in addition also adopts stilt to support, increase step such as climatic adaptation processing to reduce measuring error by setting in special sample reservation shape, the test process, guarantee test data accurately.
Description of drawings
Fig. 1 is the battery diaphragm specimen shape synoptic diagram of embodiment 1;
Fig. 2 is the battery diaphragm specimen shape synoptic diagram of embodiment 2.
Embodiment
Describe the present invention in detail below in conjunction with specific embodiments and the drawings.
Embodiment 1:
The method of testing step of present embodiment is as follows:
A: at the planimetric position of diaphragm material to be measured intercepting sample;
B: as shown in Figure 1, sample is cut into rectangle;
C:, placed 24 hours the original length L0 of test sample and original width W0 (measure and average for three times) then, and record under the initial environment condition of relative humidity 50% 23 ℃ of temperature;
D: according to test request temperature of oven is heightened 100 ℃ of predetermined temperatures, treat sample to be lain in behind the oven interior temperature stabilization on the stilt of regulation and put into baking oven, arrive the schedule time (being generally one hour) back standing time and take out;
E: sample is taken out from test environment, and under 30 ℃, place and carried out the climatic adaptation processing at least in 30 minutes, measure its final lengths L1 and final width W 1 then;
F: calculate its size changing rate according to sample original size that records and final size, the computing formula of size changing rate is as follows:
S
1＝100*(L
0-L
1)/L
0 (1)
S
2＝100*(W
0-W
1)/W
0 (2)
In the formula: S
1---specimen length rate of change, unit are (%);
S
2---specimen width rate of change, unit are (%);
L
0---sample original length, unit are (mm);
L
1---the final lengths behind the specimen test, unit is (mm);
W
0---sample original width, unit are (mm);
W
1---the final width behind the specimen test, unit are (mm).
Each sample is with maximum changing value result of calculation, and the arithmetic mean value of getting three samples is usually shunk on the occasion of expression as test findings.
Embodiment 2:
As shown in Figure 2, as different from Example 1, in the present embodiment, sample is cut into circle, and test sample is at the green diameter of a plurality of directions (Φ 1～Φ 5) and the final diameter after the corresponding test, to obtain the size changing rate of sample on above-mentioned a plurality of directions.
Claims (7)
1, a kind of method of testing of size changing rate of battery diaphragm is characterized in that comprising the steps:
A: on diaphragm material to be measured, intercept sample;
B: press reservation shape cutting sample;
C: the original size of test sample and record under the initial environment condition;
D: sample is placed the schedule time test under test environment;
E: sample is taken out from test environment, and the promoting the circulation of qi of going forward side by side is waited to adapt to and is handled, and measures its final size then;
F: calculate its size changing rate according to sample original size that records and final size.
2, the method for testing of size changing rate of battery diaphragm according to claim 1 is characterized in that in the A step, from the planimetric position intercepting sample of diaphragm material to be measured.
3, the method for testing of size changing rate of battery diaphragm according to claim 1 is characterized in that in the B step that described reservation shape is rectangle or circle.
4, the method for testing of size changing rate of battery diaphragm according to claim 1 is characterized in that in the C step, and sample is tested more than 24 hours in placement under the initial environment condition again.
5, the method for testing of size changing rate of battery diaphragm according to claim 1 is characterized in that in the D step sample being lain on the stilt, and then places the schedule time and test under test environment.
6, the method for testing of size changing rate of battery diaphragm according to claim 1 is characterized in that in the E step, and described climatic adaptation is treated at 23 ℃～40 ℃ and placed at least 30 minutes down.
7, the method for testing of size changing rate of battery diaphragm according to claim 1 is characterized in that in the F step, the computing formula of size changing rate is as follows: S=100* (L
0-L
1)/L
0, L wherein
0Be the initial length of sample at measurement direction, L
1Be the final lengths of sample at measurement direction, S is the size changing rate of sample at measurement direction.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910192073A CN101655363A (en) | 2009-09-04 | 2009-09-04 | Method for testing size changing rate of battery diaphragm |
| PCT/CN2010/076556 WO2011026431A1 (en) | 2009-09-04 | 2010-09-02 | Testing method for battery diaphragm size change rate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910192073A CN101655363A (en) | 2009-09-04 | 2009-09-04 | Method for testing size changing rate of battery diaphragm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101655363A true CN101655363A (en) | 2010-02-24 |
Family
ID=41709745
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910192073A Pending CN101655363A (en) | 2009-09-04 | 2009-09-04 | Method for testing size changing rate of battery diaphragm |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101655363A (en) |
| WO (1) | WO2011026431A1 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011026431A1 (en) * | 2009-09-04 | 2011-03-10 | 奇瑞汽车股份有限公司 | Testing method for battery diaphragm size change rate |
| CN104280418A (en) * | 2014-10-29 | 2015-01-14 | 华南理工大学 | Safety monitoring method for internal diaphragm of lithium-ion power battery |
| CN105066813A (en) * | 2015-08-06 | 2015-11-18 | 江苏安瑞达新材料有限公司 | Method for measuring neck-in ratio of polypropylene microporous membrane in manufacturing process |
| CN108445037A (en) * | 2018-01-23 | 2018-08-24 | 上海恩捷新材料科技股份有限公司 | A kind of test method of stress in thin films |
| CN110360980A (en) * | 2019-07-31 | 2019-10-22 | 宁波瑞凌新能源科技有限公司 | A kind of thin-film material thermal deformation test method and test device |
| CN110568004A (en) * | 2019-10-14 | 2019-12-13 | 上海第二工业大学 | method for testing thermal shrinkage rate of battery diaphragm |
| CN112129805A (en) * | 2020-09-24 | 2020-12-25 | 上海紫东尼龙材料科技有限公司 | Method for testing thermal shrinkage of biaxially oriented nylon film |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6245272B1 (en) * | 1999-02-19 | 2001-06-12 | Tonen Chemical Corporation | Polyolefin microporous film and method for preparing the same |
| CN100395542C (en) * | 2004-11-22 | 2008-06-18 | 上海利浦应用科学技术研究所 | Image testing method for chemical fibre thermal contraction rate and testing apparatus thereof |
| CN101655363A (en) * | 2009-09-04 | 2010-02-24 | 奇瑞汽车股份有限公司 | Method for testing size changing rate of battery diaphragm |
-
2009
- 2009-09-04 CN CN200910192073A patent/CN101655363A/en active Pending
-
2010
- 2010-09-02 WO PCT/CN2010/076556 patent/WO2011026431A1/en active Application Filing
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011026431A1 (en) * | 2009-09-04 | 2011-03-10 | 奇瑞汽车股份有限公司 | Testing method for battery diaphragm size change rate |
| CN104280418A (en) * | 2014-10-29 | 2015-01-14 | 华南理工大学 | Safety monitoring method for internal diaphragm of lithium-ion power battery |
| CN104280418B (en) * | 2014-10-29 | 2017-01-11 | 广东省标准化研究院 | Safety monitoring method for internal diaphragm of lithium-ion power battery |
| CN105066813A (en) * | 2015-08-06 | 2015-11-18 | 江苏安瑞达新材料有限公司 | Method for measuring neck-in ratio of polypropylene microporous membrane in manufacturing process |
| CN108445037A (en) * | 2018-01-23 | 2018-08-24 | 上海恩捷新材料科技股份有限公司 | A kind of test method of stress in thin films |
| CN110360980A (en) * | 2019-07-31 | 2019-10-22 | 宁波瑞凌新能源科技有限公司 | A kind of thin-film material thermal deformation test method and test device |
| CN110360980B (en) * | 2019-07-31 | 2020-05-19 | 宁波瑞凌新能源科技有限公司 | Thin film material thermal deformation testing method and testing device |
| CN110568004A (en) * | 2019-10-14 | 2019-12-13 | 上海第二工业大学 | method for testing thermal shrinkage rate of battery diaphragm |
| CN112129805A (en) * | 2020-09-24 | 2020-12-25 | 上海紫东尼龙材料科技有限公司 | Method for testing thermal shrinkage of biaxially oriented nylon film |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2011026431A1 (en) | 2011-03-10 |
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Application publication date: 20100224 |