CN101286553B - A method for improving arch amount of lithium ion cell - Google Patents
A method for improving arch amount of lithium ion cell Download PDFInfo
- Publication number
- CN101286553B CN101286553B CN2008100283344A CN200810028334A CN101286553B CN 101286553 B CN101286553 B CN 101286553B CN 2008100283344 A CN2008100283344 A CN 2008100283344A CN 200810028334 A CN200810028334 A CN 200810028334A CN 101286553 B CN101286553 B CN 101286553B
- Authority
- CN
- China
- Prior art keywords
- lithium ion
- ion battery
- heating
- septum
- pressure roller
- 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.)
- Expired - Fee Related
Links
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 15
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims abstract description 28
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- 238000005096 rolling process Methods 0.000 claims abstract description 6
- 230000004888 barrier function Effects 0.000 claims description 18
- 238000005520 cutting process Methods 0.000 claims description 13
- 241001656951 Protheca Species 0.000 claims description 7
- 230000006835 compression Effects 0.000 abstract 4
- 238000007906 compression Methods 0.000 abstract 4
- 238000005259 measurement Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920000098 polyolefin Polymers 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 230000037303 wrinkles Effects 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
- Cell Separators (AREA)
Abstract
The invention discloses a method for improving the arch magnitude of a lithium ion battery septum, which comprises the steps that an already-produced large lithium ion battery septum is rolled into a mother roll which is then divided and cut into a plurality of sections of divided and cut rolls, then, unrolling to the lithium ion battery septum on the divided and cut roll is carried out by utilizing a front set of compression rollers, next, the unrolled strip septum is treated with heating and micro stretching by utilizing a front set of the compression rollers and a back set of the compression rollers and a heating device, afterwards, the septum after the heating and the micro stretching is treated with rolling again by utilizing the back set of the compression rollers. As the measurement that the edge of the bent and transformative septum which generates a bias line is straightened is adopted, the arch magnitude of the lithium ion battery septum is improved; in addition, the wrinkling phenomenon of the surface of the lithium ion battery septum can be reduced by the heating and the micro stretching, and the planeness of the surface is also improved.
Description
Technical field
The present invention relates to the production method of lithium ion battery separator.
Background technology
The barrier film that lithium ion battery uses is the many micro-pore septums of a kind of polyolefin, it be used in effect in the lithium ion battery be can allow lithium ion charging and discharge voltage driving under waltzed through the charging and the discharge of the micropore realization battery on the barrier film, simultaneously can utilize the electrical insulating property of polyolefine material to make the positive and negative polarities of battery to separate again, avoid being short-circuited.
As everyone knows, the one procedure of manufacturer production lithium ion battery separator is that the big lithium ion battery separator of opening that will produce earlier well is rolled into parent roll, then it is cut into the volume of cutting of multistage again, dispatches from the factory.To twist in the strip lithium ion battery separator of cutting on the volume when user uses and unreel, again lithium ion battery separator will be cut into pieces, insert in the battery.The lithium ion battery separator product is arc amount from the important technology index that parent roll cuts into the lithium ion battery separator of cutting volume back formation strip, and promptly the limit of barrier film can produce the flexural deformation of off-straight, and this deflection is called arc amount.Obviously, the arc amount of barrier film is the smaller the better, otherwise it can not be well isolated the positive and negative polarities of battery, easily cause battery short circuit.
The above-mentioned good big lithium ion battery separator of opening of directly will producing is rolled into parent roll, then again it is cut into the processing method of cutting volume of a volume volume, owing to be rolled into the effect of its internal stress of barrier film of parent roll, can make the arch amount of cutting on the volume that cuts out bigger, thereby cause the barrier film rate of finished products that processes lower.
Summary of the invention
The purpose of this invention is to provide a kind of method of improving arch amount of lithium ion cell, to improve the rate of finished products of lithium ion battery separator product.
Method of the present invention is as follows:
A, the big lithium ion battery separator of opening that will produce well are rolled into parent roll, then it are cut into the volume of cutting of multistage, then again
B, utilize the protheca pressure roller that the lithium ion battery separator of cutting on the volume is unreeled, then
C, utilize before and after the different pressure roller of two cover rotating speeds and utilize before and after between two cover pressure rollers heater to the strip barrier film that unreels out heat, little stretching, wherein, the rotating speed of protheca pressure roller is lower than the rotating speed of back cover pressure roller, then
D, utilization back cover pressure roller carry out rolling again to the barrier film through heating and little stretching.
More than as seen, the present invention is owing to taked stretching measure is carried out on the limit of the diastrophic barrier film that produces off-straight, and its arc amount is improved, in addition, can also reduce the phenomenon of wrinkling of sending out on lithium ion battery separator surface by heating and little stretching, its evenness has also been improved.The present invention has improved the rate of finished products of lithium ion battery separator widely.
Embodiment
The invention will be further described below in conjunction with embodiment.
When using the said method of improving arch amount of lithium ion cell of the present invention, can at first one in front and one in back be provided with two cover pressure rollers in order to unreel twisting in the barrier film of cutting on the volume, little stretching and rolling, and the rotating speed of protheca pressure roller is lower than the rotating speed of back pressure roller so that can carry out little stretching to the barrier film that unreels out, the heater of a controllable temperature is set between two cover pressure rollers again, makes by the barrier film after unreeling through being heated behind this heater with convenient by little stretching.The way of having followed after having had these to be provided with is, a, the big lithium ion battery separator of opening that will produce well are rolled into parent roll, then again it is cut into the volume of cutting of multistage, follow b, utilize the protheca pressure roller that the lithium ion battery separator of cutting on the volume is unreeled, then c, utilize before and after two cover pressure rollers and utilize heater that the strip barrier film that unreels is out heated and little stretching, then d, utilize back cover pressure roller that the barrier film through heating and little stretching is carried out rolling again.
Setting in order to unreel twisting in the barrier film of cutting on the volume, two cover pressure rollers of little stretching and rolling, the rotating speed of protheca pressure roller should be lower than the rotating speed of back cover pressure roller so that the barrier film that unreels is out carried out little stretching, and the distance of front and back two cover pressure rollers can be between 1% to 5% at its speed discrepancy under the situation of 50cm.The heater of the controllable temperature that is provided with between two pressure rollers, its heating-up temperature can be set in the scope of 90 degree to 200 degree.
Utilizing said method to improve to send out the arc amount of the waste product lithium ion battery separator of wrinkle, is that 170 ℃, the speed discrepancy of front and back two pair rollers are that its arc quantitative change is 5mm under 4% the situation in heating-up temperature, and evenness becomes medium.
Utilize said method improve arc amount bigger, arc amount is the lithium ion battery separator of 13mm, is that 160 ℃, the speed discrepancy of front and back two pair rollers are that its arc quantitative change is 4.5mm, has improved 188% under 3% the situation in heating-up temperature.
Utilize said method improve arc amount medium, arc amount is the lithium ion battery separator of 7mm, is that 150 ℃, the speed discrepancy of front and back two pair rollers are that its arc quantitative change is 3.5mm, has improved 100% under 2% the situation in heating-up temperature.
Claims (4)
1. a method of improving arch amount of lithium ion cell is characterized in that
A, the big lithium ion battery separator of opening that will produce well are rolled into parent roll, then it are cut into the volume of cutting of multistage, then again
B, utilize the protheca pressure roller that the lithium ion battery separator of cutting on the volume is unreeled, then
C, utilize before and after the different pressure roller of two cover rotating speeds and utilize before and after between two cover pressure rollers heater to the strip barrier film that unreels out heat, little stretching, wherein, the rotating speed of protheca pressure roller is lower than the rotating speed of back cover pressure roller, then
D, utilization back cover pressure roller carry out rolling again to the barrier film through heating and little stretching.
2. the method for improving arch amount of lithium ion cell according to claim 1 is characterized in that, the distance of described front and back two cover pressure rollers is under the situation of 50cm, and its speed discrepancy is between 1% to 5%.
3. the method for improving arch amount of lithium ion cell according to claim 1 and 2, the heating-up temperature that it is characterized in that described heater are set in 90 ℃ to 200 ℃ the scope.
4. the method for improving arch amount of lithium ion cell according to claim 1 is characterized in that the heating-up temperature of described heater is set in 160 ℃, front and back two cover rollers apart from 50cm, its speed discrepancy is 3%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100283344A CN101286553B (en) | 2008-05-27 | 2008-05-27 | A method for improving arch amount of lithium ion cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100283344A CN101286553B (en) | 2008-05-27 | 2008-05-27 | A method for improving arch amount of lithium ion cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101286553A CN101286553A (en) | 2008-10-15 |
| CN101286553B true CN101286553B (en) | 2010-06-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100283344A Expired - Fee Related CN101286553B (en) | 2008-05-27 | 2008-05-27 | A method for improving arch amount of lithium ion cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101286553B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108348957A (en) * | 2015-10-30 | 2018-07-31 | 住友化学株式会社 | Film manufacturing method, film manufacturing device and film |
| CN105870381B (en) * | 2016-04-29 | 2018-08-17 | 宁德卓高新材料科技有限公司 | Improve the heat shrink process of diaphragm rippled edge and its is heat-shrinked device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3947537A (en) * | 1971-07-16 | 1976-03-30 | Exxon Research & Engineering Co. | Battery separator manufacturing process |
| CN1174503C (en) * | 1998-05-28 | 2004-11-03 | 富士电气化学株式会社 | Separator for alkaline cell and method of producing separator |
-
2008
- 2008-05-27 CN CN2008100283344A patent/CN101286553B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3947537A (en) * | 1971-07-16 | 1976-03-30 | Exxon Research & Engineering Co. | Battery separator manufacturing process |
| CN1174503C (en) * | 1998-05-28 | 2004-11-03 | 富士电气化学株式会社 | Separator for alkaline cell and method of producing separator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101286553A (en) | 2008-10-15 |
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| C14 | Grant of patent or utility model | ||
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Owner name: FOSHAN JINHUI HI-TECH. OPTOELECTRONIC MATERIAL CO. Free format text: FORMER OWNER: FOSHAN FSPG HI-TECH. SHARES CO., LTD. Effective date: 20120420 |
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Owner name: FOSHAN FSPG HI-TECH. SHARES CO., LTD. Free format text: FORMER NAME: FOSHAN PLASTIC GROUP CO., LTD. |
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Address after: 528000 No. 82 middle Fenjiang Road, Chancheng District, Guangdong, Foshan Patentee after: FSPG HI-TECH Co.,Ltd. Address before: 528000 No. 82 middle Fenjiang Road, Chancheng District, Guangdong, Foshan Patentee before: Foshan Plastics Group Co.,Ltd. |
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Effective date of registration: 20120420 Address after: 528000 Chancheng City, Foshan Province Light District, No. three road, No. 7, No. Patentee after: FOSHAN JINHUI HIGH-TECH OPTOELECTRONIC MATERIAL Co.,Ltd. Address before: 528000 No. 82 middle Fenjiang Road, Chancheng District, Guangdong, Foshan Patentee before: FSPG HI-TECH Co.,Ltd. |
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Denomination of invention: A method for improving arch amount of lithium ion cell Effective date of registration: 20150630 Granted publication date: 20100602 Pledgee: Guangdong Guangxin Holdings Group Co. Ltd. Pledgor: FOSHAN JINHUI HIGH-TECH OPTOELECTRONIC MATERIAL Co.,Ltd. Registration number: 2015440000010 |
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Date of cancellation: 20161202 Granted publication date: 20100602 Pledgee: Guangdong Guangxin Holdings Group Co. Ltd. Pledgor: FOSHAN JINHUI HIGH-TECH OPTOELECTRONIC MATERIAL Co.,Ltd. Registration number: 2015440000010 |
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Address after: Chancheng District of Guangdong city in Foshan province 528000 quarter of Huayi Road No. 28, a two building 17 layer (residence declaration) Patentee after: Foshan Jinhui Gao Ke photoelectric material Limited by Share Ltd. Address before: 528000 Chancheng City, Foshan Province Light District, No. three road, No. 7, No. Patentee before: FOSHAN JINHUI HIGH-TECH OPTOELECTRONIC MATERIAL Co.,Ltd. |
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Granted publication date: 20100602 |