CN103028535A - Membrane gluing method - Google Patents
Membrane gluing method Download PDFInfo
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- CN103028535A CN103028535A CN2012105390616A CN201210539061A CN103028535A CN 103028535 A CN103028535 A CN 103028535A CN 2012105390616 A CN2012105390616 A CN 2012105390616A CN 201210539061 A CN201210539061 A CN 201210539061A CN 103028535 A CN103028535 A CN 103028535A
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- membrane
- barrier film
- gluing
- glued
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- 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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Abstract
The invention relates to the technical field of a lithium ion battery and particularly discloses a membrane gluing method. The membrane gluing method comprises the following steps of firstly sufficiently wetting a membrane to be glued in an easily-volatilized solvent and then gluing the wetted membrane; and then drying the glued membrane so as to finish the gluing operation. According to the membrane gluing method disclosed by the invention, one procedure of wetting the membrane to be glued in the easily-volatilized solvent is added on the basis of a traditional glue coating manner, so that the membrane is wetted before being glued and pores of the membrane are fully filled with the easily-volatilized solvent; then the wetted membrane is glued and a solution in the membrane can be volatilized from the pores of the membrane in a drying process, so as to have a certain pore forming effect and prevent a surface glue layer from covering the pores of the membrane; and therefore, the covering of a membrane surface gap by the surface glue layer can be effectively reduced, the ion conduction rate of the membrane is improved and the performance of a polymer battery is further improved.
Description
Technical field
The present invention relates to technical field of lithium ion, be specifically related to a kind of barrier film glue spreading method.
Background technology
Lithium ion battery have voltage height, specific energy high, recycle often, the advantage such as memory time is long, not only on portable electric appts, be used widely such as mobile phone, DV and laptop computer, and be widely used in the big-and-middle-sized electrical equipment aspects such as electric automobile, electric bicycle and electric tool, therefore more and more higher to the safety requirements of lithium ion battery.
Barrier film is the important component part of lithium ion battery, barrier film can prevent the lithium ion battery plus-negative plate short circuit, be lithium ion at the passage of both positive and negative polarity motion, in lithium ion battery, play vital effect; Polymer Li-ion battery adopts flexible package, and for making the pole piece typing, the employed membrane surface of polymer Li-ion battery scribbles one deck glue-line; What the conventional membrane gluing adopted is infusion process, be about to barrier film by behind the certain density glue, make membrane surface be stained with a certain amount of glue, make glue be fixed on membrane surface after the oven dry, the parameters such as solid content by control coating speed, glue are controlled the thickness of membrane surface glue-line, i.e. coating amount.
Behind membrane surface coating one deck glue-line, the glue-line of membrane surface can cover a part of space of membrane surface, thereby the passage of blocking-up lithium ion, the ion guide passband of barrier film is reduced, and then the increase internal resistance of cell, the performance of lithium ion battery is decreased, and the barrier film glue-line of thick coating amount is particularly serious.
Summary of the invention
The object of the present invention is to provide a kind of barrier film glue spreading method, can effectively reduce the membrane surface glue-line to the covering in membrane surface space, and then rate promotes the performance of polymer Li-ion battery.
For realizing above-mentioned purpose, the technical solution adopted in the present invention is as follows:
A kind of barrier film glue spreading method, the barrier film of in advance treating gluing in the effumability solvent fully infiltrates, and then the barrier film after infiltrating is carried out gluing, afterwards to the oven dry of the barrier film behind the gluing, thereby finishes the gluing operation.
Solvent phase in the gluing solution that described effumability profit is molten and gluing is used together.
Described effumability solvent is acetone.
The present invention infiltrates first barrier film by increase the infiltration operation of the effumability solvent for the treatment of together the gluing barrier film on tradition coating glue mode basis to barrier film before gluing, make in the hole of barrier film to be full of the effumability solvent; Barrier film after the infiltration carries out gluing again, the solution of barrier film inside evaporates from the barrier film hole during oven dry, can play certain pore-creating effect, prevent that surperficial glue-line is to the covering of barrier film hole, thereby can effectively reduce the membrane surface glue-line to the covering in membrane surface space, improve the ion guide passband of barrier film, and then promote the performance of polymer battery.
Description of drawings
Figure 1 shows that the schematic diagram of the barrier film glue spreading method that the embodiment of the invention provides;
Among the figure: 1, unreel end, 2, immersion slot, 3, coating groove, 4, baking zone, 5, the rolling end, 6, barrier film, 7, guide roller.
The specific embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing, the present invention is further elaborated.
The present invention is achieved in that a kind of barrier film glue spreading method, and the barrier film of in advance treating gluing in the effumability solvent fully infiltrates, and then the barrier film after infiltrating is carried out gluing, afterwards to the oven dry of the barrier film behind the gluing, thereby finishes the gluing operation.
Solvent phase in the gluing solution that described effumability profit is molten and gluing is used together.
Described effumability solvent is acetone.
Referring to Fig. 1, first barrier film 6 is held 1 through corresponding guide roller from unreeling of glue spreading apparatus, at first enter the effumability solvent is housed in the immersion slot 2(), make the hole of barrier film 6 infiltrate full described effumability solvent, enter again coating groove 3 through the barrier film 6 after the infiltration processing by corresponding guide roller and carry out the gluing operation, enter baking zone 4 oven dry behind a certain amount of glue of barrier film 6 surface adhesion behind the gluing, in baking zone 4 drying courses, when the intrapore easy volatile solvent of barrier film 6 is volatilized, the glue-line on barrier film 6 surfaces is played to a certain degree pore-creating effect, and the barrier film 6 after the oven dry enters rolling end 5 through corresponding guide roller and finishes the gluing operation.
Barrier film of the present invention is usually being made by PP or PE material under the prior art, or is cancellated battery separator by the surface that PE, PP Material cladding are made together.
To be coated with sol solution be that a certain amount of PVDF is dissolved in the organic solvent of a certain amount of effumability and forms (this concentration that is coated with sol solution need to be determined according to the coating amount of the required glue-line that will apply) because the gluing process is employed, therefore, the used solvent of impregnation process of the present invention is effumability, and preferably select with dispose solvent phase that gluing solution uses with solvent, be coated with sol solution in order to avoid pollute, such as using acetone.As for barrier film profit with the infiltrating time in the solvent without specific requirement, only need fully to infiltrate barrier film and just can.
The present invention infiltrates operation together by increasing on tradition coating glue mode basis, even barrier film infiltrates barrier film first before entering the glue groove, makes to be full of the effumability solvent in the barrier film hole; Barrier film after the infiltration is again by carrying out gluing in the glue groove, the solution of barrier film inside evaporates from the barrier film hole during oven dry, can play to the glue-line of membrane surface certain pore-creating effect, prevent that surperficial glue-line is to the covering of barrier film hole, increased the passage that lithium ion moves, can reduce the internal resistance of cell simultaneously, thereby can effectively reduce the membrane surface glue-line to the covering in membrane surface space, improve the ion guide passband of barrier film, and then promote the performance of polymer battery.
The above only is preferred embodiment of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (3)
1. a barrier film glue spreading method is characterized in that, the barrier film of in advance treating gluing in the effumability solvent fully infiltrates, and then the barrier film after infiltrating is carried out gluing, afterwards to the oven dry of the barrier film behind the gluing, thereby finishes the gluing operation.
2. barrier film glue spreading method according to claim 1 is characterized in that, the solvent phase in the gluing solution that described effumability profit is molten and gluing is used together.
3. according to claim or 1 or 2 described barrier film glue spreading methods, it is characterized in that described effumability solvent is acetone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105390616A CN103028535A (en) | 2012-12-11 | 2012-12-11 | Membrane gluing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105390616A CN103028535A (en) | 2012-12-11 | 2012-12-11 | Membrane gluing method |
Publications (1)
| Publication Number | Publication Date |
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| CN103028535A true CN103028535A (en) | 2013-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012105390616A Pending CN103028535A (en) | 2012-12-11 | 2012-12-11 | Membrane gluing method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105436054A (en) * | 2015-11-25 | 2016-03-30 | 合肥国轩高科动力能源有限公司 | Gluing method for lithium secondary battery diaphragm |
| CN105845868A (en) * | 2016-03-23 | 2016-08-10 | 珠海光宇电池有限公司 | Diaphragm glue-coating solvent, and application thereof in preparation of lithium battery diaphragm |
| CN105895845A (en) * | 2014-11-21 | 2016-08-24 | 深圳市天和顺科技有限公司 | Preparation methods of gel electrolyte separator and lithium ion battery |
| CN108015925A (en) * | 2017-12-28 | 2018-05-11 | 东莞联茂电子科技有限公司 | Secondary pre- immersion prepreg dipping device and its impregnation method |
| CN111370622A (en) * | 2020-03-18 | 2020-07-03 | 江苏厚生新能源科技有限公司 | Coating area-controllable gluing diaphragm and preparation method thereof, gluing layer and lithium battery |
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| CN101434708A (en) * | 2008-12-19 | 2009-05-20 | 成都中科来方能源科技有限公司 | Aqueous polymer modified micropore polyolefin barrier diaphragm, and preparation and use thereof |
| CN101656306A (en) * | 2008-08-22 | 2010-02-24 | 比亚迪股份有限公司 | Composite membrane and preparation method thereof and battery comprising composite membrane |
| US20110045338A1 (en) * | 2008-03-04 | 2011-02-24 | Lg Chem, Ltd. | Separator having porous coating layer and electrochemical device containing the same |
| CN102329594A (en) * | 2011-06-14 | 2012-01-25 | 刘继福 | Two-component urethane resin adhesive for polymer lithium ion battery flexible package film |
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2012
- 2012-12-11 CN CN2012105390616A patent/CN103028535A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110045338A1 (en) * | 2008-03-04 | 2011-02-24 | Lg Chem, Ltd. | Separator having porous coating layer and electrochemical device containing the same |
| CN101656306A (en) * | 2008-08-22 | 2010-02-24 | 比亚迪股份有限公司 | Composite membrane and preparation method thereof and battery comprising composite membrane |
| CN101434708A (en) * | 2008-12-19 | 2009-05-20 | 成都中科来方能源科技有限公司 | Aqueous polymer modified micropore polyolefin barrier diaphragm, and preparation and use thereof |
| CN102329594A (en) * | 2011-06-14 | 2012-01-25 | 刘继福 | Two-component urethane resin adhesive for polymer lithium ion battery flexible package film |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105895845A (en) * | 2014-11-21 | 2016-08-24 | 深圳市天和顺科技有限公司 | Preparation methods of gel electrolyte separator and lithium ion battery |
| CN105436054A (en) * | 2015-11-25 | 2016-03-30 | 合肥国轩高科动力能源有限公司 | Gluing method for lithium secondary battery diaphragm |
| CN105845868A (en) * | 2016-03-23 | 2016-08-10 | 珠海光宇电池有限公司 | Diaphragm glue-coating solvent, and application thereof in preparation of lithium battery diaphragm |
| CN108015925A (en) * | 2017-12-28 | 2018-05-11 | 东莞联茂电子科技有限公司 | Secondary pre- immersion prepreg dipping device and its impregnation method |
| CN108015925B (en) * | 2017-12-28 | 2024-06-07 | 东莞联茂电子科技有限公司 | Secondary presoaked prepreg impregnation device and impregnation method thereof |
| CN111370622A (en) * | 2020-03-18 | 2020-07-03 | 江苏厚生新能源科技有限公司 | Coating area-controllable gluing diaphragm and preparation method thereof, gluing layer and lithium battery |
| CN111370622B (en) * | 2020-03-18 | 2022-01-28 | 江苏厚生新能源科技有限公司 | Coating area-controllable gluing diaphragm and preparation method thereof, gluing layer and lithium battery |
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Application publication date: 20130410 |