CN105352804A - Method for detecting service life of tensioned dry method uniaxial tension diaphragm - Google Patents
Method for detecting service life of tensioned dry method uniaxial tension diaphragm Download PDFInfo
- Publication number
- CN105352804A CN105352804A CN201510856887.9A CN201510856887A CN105352804A CN 105352804 A CN105352804 A CN 105352804A CN 201510856887 A CN201510856887 A CN 201510856887A CN 105352804 A CN105352804 A CN 105352804A
- Authority
- CN
- China
- Prior art keywords
- detection method
- batten
- barrier film
- cupping machine
- described step
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
- G01N3/066—Special adaptations of indicating or recording means with electrical indicating or recording means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/403—Manufacturing processes of separators, membranes or diaphragms
-
- 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
- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- General Health & Medical Sciences (AREA)
- Pathology (AREA)
- Immunology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Biochemistry (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Manufacturing & Machinery (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Electrochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention mainly aims at providing a method for detecting the service life of a tensioned dry method uniaxial tension diaphragm. Bases are provided for the actual production process, and waves, tippets and other later changes in the diaphragm production process are reduced. A tensile testing machine is adopted. According to the method for detecting the service life of the tensioned dry method uniaxial tension diaphragm, the tensile testing machine is adopted, the bases are provided for the actual production process, and the situation that waves, tippets and other later changes are caused in the diaphragm production process due to the fact that placing time is insufficient is avoided.
Description
Technical field
The invention belongs to the preparation field of lithium battery dry method unilateral stretching barrier film, particularly a kind of detection method of the rear Use Limitation that stretches for dry method unilateral stretching barrier film
Background technology
Lithium battery has that open-circuit voltage is high, high energy ratio and feature capacious, the electrokinetic cell of Dou Shi new-energy automobile manufacturer favor all the time.Due to electric automobile it is desirable that high-power power, in actual use, thousands of battery cores are often used to be connected into electric battery to ensure the supply of energy.According to relevant industry report measuring and calculating, pure electric automobile needs positive electrode and the electrolytic solution of 40 kilograms ~ 50 kilograms, is about 10,000 times of single battery of mobile phone consumption.Therefore, the rise of electric automobile industry brings the demand growth of decades of times to undoubtedly domestic lithium battery industry.
Barrier film is as one of the four large materials of lithium battery, have also been obtained very large opportunity to develop, but also on consistency of performance and flat appearance degree, be suggested more higher requirements simultaneously, the quality of barrier film will directly affect usability and the security performance of lithium battery, its Wave, flap are the key issue points affecting barrier film flat appearance degree, the technical barrier of Ye Shige macromesenterium manufacturer earnestly seeking breakthrough always.
Present Domestic dry method unilateral stretching barrier film production Technology is ripe, and through extruding, curtain coating, annealing in process, unilateral stretching, finished product the link manufacture such as to cut.Find after deliberation, when barrier film has just stretched, inner internal stress is large, need static certain hour of placing to eliminate internal stress, and the barrier film later stage such as wave, the flap change after finished product is cut that there is larger internal stress will obviously aggravate.In current actual production process, not clear and definite method is not determined that the large film after stretching need be placed and how long can be dropped into finished product and cut, and this considerably increases the uncertainty in actual production process.
Summary of the invention
For the problems referred to above, the detection method that fundamental purpose of the present invention stretches rear Use Limitation for providing a kind of dry method unilateral stretching barrier film, for actual production process provides foundation, reduces the later stage such as wave, the flap change in barrier film production run.Use equipment is cupping machine.
The object of the invention is to by using cupping machine, the detection method of Use Limitation after providing a kind of dry method unilateral stretching barrier film to stretch, for actual production process provides foundation, eliminate the cosmetic variation such as wave, flap because placing in the barrier film production run that causes of underaging.
Above-mentioned technical purpose of the present invention can be achieved through the following technical solutions:
A, the rectangular specimens cut along the longitudinal direction of draw direction;
B, get a batten, use cupping machine to clamp batten two;
Tensile stress situation of change in c, this process of computer record of being connected by cupping machine, and production tension variation curve, record duration is 10 ~ 60min;
D, every 0.5 ~ 12h, repeat step b and c;
Two tension curves before and after e, contrast, until two tension curves overlap substantially.
Preferably, the barrier film sampled in above-mentioned steps a is the barrier film just stretched.
Preferably, the position sampled in above-mentioned steps a is 2 ~ 3m from the termination of barrier film.
Preferably, batten width preferably 10 ~ 20mm in above-mentioned steps a.
Preferably, in above-mentioned steps a, cut out the centre position that sample is taken at barrier film, and the quantity of once cutting out sample should be no less than 5.Better can ensure the consistance of cutting out sample like this.
Preferably, in above-mentioned steps b, the length of cupping machine clamping batten is 100 ~ 200mm.
Preferably, in above-mentioned steps c, the tensile elongation of cupping machine is 5% ~ 8% of clamping length.
Preferably, in above-mentioned steps c, the record duration of cupping machine is 30 ~ 40min.
Preferably, in above-mentioned steps d, interval time is preferably 2 ~ 8h.
Preferably, in above-mentioned steps d, interval time is preferably 6 ~ 8h.
This forwarding method has following advantage:
(1) pick-up unit is simple and easy, and detect operating process simple, efficiency is high;
(2) confirmed standard of barrier film timeliness, is applicable to different manufacturing process and unlike material product.
The invention provides a kind of dry method unilateral stretching barrier film stretch after the detection method of Use Limitation, for actual production process provides foundation, eliminate the cosmetic variation such as wave, flap because placing in barrier film production run that underaging causes.
Accompanying drawing explanation
Fig. 1 the present invention 16 μ product difference places the stress relaxation contrast of timeliness;
Fig. 2 the present invention longitudinally cuts out batten design sketch;
Fig. 3 cupping machine front elevation of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further illustrated.
Embodiment 1
Be below the concrete case study on implementation of this method:
A, the 16 μ products just stretched are got one deck sample, the length of pull-out barrier film is about 2m; Use sanction sample equipment to cut batten along the longitudinal direction of draw direction, batten width is 15mm, and quantity is 10;
B, get a batten, use and newly think carefully cupping machine, clamp batten both sides with chuck, the batten length between chuck is 100mm.
C, setting tensile elongation are 5mm, and keep this stretch position, the tensile stress situation of change in this process of the computer record connected by cupping machine, and record duration is 30min;
D, the batten got every 6h in step a, repeat step b and c;
E, obtain 6 tension curves, comparing result, until as shown in Figure 1, two tension curves overlap substantially.
As shown in Figure 1, it places timeliness is that the later stress relaxation curve of 18h overlaps substantially, thus 16 μ products stretch after Use Limitation be 18h.
Embodiment 2
Be below the concrete case study on implementation of this method:
A, the 32 μ products just stretched are got one deck sample, the length of pull-out barrier film is about 3m; Use sanction sample equipment to cut batten along the longitudinal direction of draw direction, batten width is 10mm, and quantity is 5;
B, get a batten, use and newly think carefully cupping machine, clamp batten both sides with chuck, the batten length between chuck is 150mm.
C, setting tensile elongation are 5mm, and keep this stretch position, the tensile stress situation of change in this process of the computer record connected by cupping machine, and record duration is 10min;
D, the batten got every 0.5h in step a, repeat step b and c;
E, obtain 6 tension curves, until two tension curves overlap substantially.
Embodiment 3
Be below the concrete case study on implementation of this method:
A, the 50 μ products just stretched are got one deck sample, the length of pull-out barrier film is about 2m; Use sanction sample equipment to cut batten along the longitudinal direction of draw direction, batten width is 20mm, and quantity is 10;
B, get a batten, use and newly think carefully cupping machine, clamp batten both sides with chuck, the batten length between chuck is 200mm.
C, setting tensile elongation are 5mm, and keep this stretch position, the tensile stress situation of change in this process of the computer record connected by cupping machine, and record duration is 60min;
D, the batten got every 12h in step a, repeat step b and c;
E, obtain 6 tension curves, until two tension curves overlap substantially.
Comparative example 1
Be below the comparative example explanation of clamping length:
A, set different winding tensions (all needing rolling rolling in barrier film production run), make the deformation quantity of wrapup procedure septation (namely tensile elongation is clamping length), be respectively 2%, 4%, 5%, 7%, 8%, 9%, 10%;
Rolling quality after b, observation rolling complete;
The rolling quality that table 1 different rolling deformation quantity is corresponding
| Deformation quantity | Rolling quality | Remarks |
| 2％ | Serious loose winding | Product is defective |
| 4％ | Slight loose winding | Product is defective |
| 5％ | Without exception | Product is qualified |
| 7％ | Without exception | Product is qualified |
| 8％ | Without exception | Product is qualified |
| 9％ | Film volume cosmetic variation is serious | Product is defective |
| 10％ | Film volume cosmetic variation is serious | Product is defective |
C, as can be seen from Table 1, be adapt to actual production, the deformation quantity the best in wrapup procedure is 5%-8%.In wrapup procedure lower than this deformation quantity then film roll out existing loose winding, product is defective; Then can damage barrier film higher than this deformation quantity in wrapup procedure, make barrier film occur serious cosmetic variation.Institute thinks corresponding production run, and tensile elongation is that clamping length is set as 5%-8%.
The foregoing is only preferred embodiment of the present invention, be in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.All any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. a detection method for the rear Use Limitation of dry method unilateral stretching barrier film stretching, comprises the following steps:
A, the rectangular specimens cut along the longitudinal direction of draw direction;
B, get a batten, use cupping machine to clamp batten two;
Tensile stress situation of change in c, this process of computer record of being connected by cupping machine, record duration is 10 ~ 60min;
D, every 0.5 ~ 12h, repeat step b and c;
Two tension curves before and after e, contrast, until two tension curves overlap substantially.
2. detection method according to claim 1, it is characterized in that, the position sampled in described step a is 2 ~ 3m from the termination of barrier film.
3. detection method according to claim 1, is characterized in that, batten width preferably 10 ~ 20mm in described step a.
4. detection method according to claim 1, it is characterized in that, cut out the centre position that sample is taken at barrier film in described step a, and the quantity of once cutting out sample should be no less than 5.
5. detection method according to claim 1, is characterized in that, in described step b, the length of cupping machine clamping batten is 100 ~ 200mm.
6. detection method according to claim 1, it is characterized in that, in described step c, the tensile elongation of cupping machine is 5% ~ 8% of clamping length.
7. detection method according to claim 1, it is characterized in that, in described step c, the record duration of cupping machine is 30 ~ 40min.
8. detection method according to claim 1, it is characterized in that, in described steps d, interval time is preferably 2 ~ 8h.
9. detection method according to claim 8, it is characterized in that, in described steps d, interval time is preferably 6 ~ 8h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510856887.9A CN105352804A (en) | 2015-11-30 | 2015-11-30 | Method for detecting service life of tensioned dry method uniaxial tension diaphragm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510856887.9A CN105352804A (en) | 2015-11-30 | 2015-11-30 | Method for detecting service life of tensioned dry method uniaxial tension diaphragm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105352804A true CN105352804A (en) | 2016-02-24 |
Family
ID=55328811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510856887.9A Pending CN105352804A (en) | 2015-11-30 | 2015-11-30 | Method for detecting service life of tensioned dry method uniaxial tension diaphragm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105352804A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107340182A (en) * | 2016-09-29 | 2017-11-10 | 哈尔滨理工大学 | Weigh the measuring method of soft package lithium battery punching press packaging bag security |
| DE102018100986A1 (en) | 2018-01-17 | 2019-07-18 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Galvanic cell |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08108467A (en) * | 1994-10-11 | 1996-04-30 | Teijin Ltd | Relaxation heat treatment for oriented film |
| CN1379713A (en) * | 1999-10-15 | 2002-11-13 | 3M创新有限公司 | Conformable multilayer films |
| CN1537134A (en) * | 2001-08-01 | 2004-10-13 | �����Ű�̩��Ƭ�ϻ�������˾ | Conformable copolyester film |
| CN101463114A (en) * | 2002-03-27 | 2009-06-24 | Dsmip财产有限公司 | Curable liquid resin composition |
| CN102408844A (en) * | 2010-09-20 | 2012-04-11 | 日东电工株式会社 | Pressure-sensitive adhesive sheet |
| CN202229985U (en) * | 2011-06-30 | 2012-05-23 | 江苏明珠试验机械有限公司 | Novel tester for testing rubber tensile stress relaxation performance |
| CN104476774A (en) * | 2014-11-29 | 2015-04-01 | 安徽美翔塑业有限公司 | Production process of BOPET (Biaxially Oriented Polyester) film |
| WO2015052931A1 (en) * | 2013-10-10 | 2015-04-16 | Panasonic Intellectual Property Management Co., Ltd. | Electorically conductive film |
-
2015
- 2015-11-30 CN CN201510856887.9A patent/CN105352804A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08108467A (en) * | 1994-10-11 | 1996-04-30 | Teijin Ltd | Relaxation heat treatment for oriented film |
| CN1379713A (en) * | 1999-10-15 | 2002-11-13 | 3M创新有限公司 | Conformable multilayer films |
| CN1537134A (en) * | 2001-08-01 | 2004-10-13 | �����Ű�̩��Ƭ�ϻ�������˾ | Conformable copolyester film |
| CN101463114A (en) * | 2002-03-27 | 2009-06-24 | Dsmip财产有限公司 | Curable liquid resin composition |
| CN102408844A (en) * | 2010-09-20 | 2012-04-11 | 日东电工株式会社 | Pressure-sensitive adhesive sheet |
| CN202229985U (en) * | 2011-06-30 | 2012-05-23 | 江苏明珠试验机械有限公司 | Novel tester for testing rubber tensile stress relaxation performance |
| WO2015052931A1 (en) * | 2013-10-10 | 2015-04-16 | Panasonic Intellectual Property Management Co., Ltd. | Electorically conductive film |
| CN104476774A (en) * | 2014-11-29 | 2015-04-01 | 安徽美翔塑业有限公司 | Production process of BOPET (Biaxially Oriented Polyester) film |
Non-Patent Citations (2)
| Title |
|---|
| 中华人民共和国国家质量监督检验检疫总局等: "《GB/T 9781-2008 硫化橡胶或热塑性橡胶老化性能的测定 拉伸应力松弛试验》", 1 April 2008, 中国标准出版社 * |
| 袁明珍: "《电气用塑料薄膜试验方法》", 3 July 1992, 中国标准出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107340182A (en) * | 2016-09-29 | 2017-11-10 | 哈尔滨理工大学 | Weigh the measuring method of soft package lithium battery punching press packaging bag security |
| DE102018100986A1 (en) | 2018-01-17 | 2019-07-18 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Galvanic cell |
| DE102018100986B4 (en) | 2018-01-17 | 2022-08-11 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Galvanic cell |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103018566A (en) | Lithium ion battery direct current internal resistance testing method and battery screening method | |
| CN105352804A (en) | Method for detecting service life of tensioned dry method uniaxial tension diaphragm | |
| CN104409780A (en) | Forming method of lithium titanate battery | |
| CN108226806B (en) | Charge self-discharge detection method and battery detection device | |
| CN204966525U (en) | Improve volume production device of photic decay of P type crystal silicon battery fast | |
| CN103513171A (en) | Power-frequency voltage-withstand testing equipment and method for composite post insulator | |
| CN103915643A (en) | Method for improving performance of square aluminum-shell battery | |
| CN105710050B (en) | Battery cell method for separating | |
| CN205228960U (en) | Lithium cell explosion -proof cover pressure test machine | |
| CN103558516A (en) | Method of testing alternating current voltage resistance performance of multi-core cable | |
| CN112379277A (en) | Lithium ion battery capacity prediction method | |
| CN105479765A (en) | Preparation method of high-liquid-absorptivity/high-liquid-maintainability dry one-way stretching diaphragm | |
| CN101581766A (en) | Method for detecting invalid detecting point of cell detecting cabinet | |
| KR101528005B1 (en) | Battery aging method | |
| CN203502443U (en) | Chip solid capacitor test fixture | |
| CN204349922U (en) | A kind of EL test circuit with protection assembly | |
| CN204465342U (en) | A kind of two-way ultralow pressure DC/DC converter | |
| CN104716388A (en) | Treatment method of lithium ion battery | |
| CN110459644A (en) | A method of cell piece, which is repaired, using electrical pumping equipment aoxidizes | |
| CN103308742B (en) | The checking of lead-acid accumulator constant-current discharge current parameters and method of testing | |
| CN203164238U (en) | Shorten disengagement deionized water terminal for cable partial discharge test | |
| CN110888055A (en) | High-efficient dry battery tests electric installation | |
| CN207198311U (en) | A kind of automobile lighting module reliability tester | |
| CN103645373B (en) | A kind of method of monitoring dark current | |
| CN101931104B (en) | Manufacture method of winding battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160224 |