CN105118945B - A kind of winding core for being available for lithium ion battery separator freely to be breathed in storage - Google Patents
A kind of winding core for being available for lithium ion battery separator freely to be breathed in storage Download PDFInfo
- Publication number
- CN105118945B CN105118945B CN201510569724.2A CN201510569724A CN105118945B CN 105118945 B CN105118945 B CN 105118945B CN 201510569724 A CN201510569724 A CN 201510569724A CN 105118945 B CN105118945 B CN 105118945B
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- Prior art keywords
- barrier film
- lithium ion
- ion battery
- core
- freely
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- 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
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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)
- Cell Separators (AREA)
Abstract
The invention belongs to lithium ion battery barrier film production technical field, specifically related to a kind of winding core for being available for lithium ion battery separator freely to be breathed in storage, including cylindric hard core, the ventilative bed course of long tubular prepared by poromerics is arranged with the side wall of the cylindric hard core, the poromerics is by MDI types or TDI type polyurethane micropore elastomer materials, and its density is 0.4~0.7g/cm3, aperture is 0.5~8 μm.Beneficial effects of the present invention are, the ventilative bed course of long tubular prepared by poromerics is arranged in the lateral wall of hard core, wind after barrier film, internal layer barrier film can be connected by the microcellular structure for bed course of breathing freely with outside air, can free " breathing " air, ensure during internal layer barrier film long-term storage diaphragm micro-hole will not to be caused to close with air contact because of difficult, it is ensured that the performance of barrier film is not reduced because of resting period length.
Description
Technical field
The invention belongs to lithium ion battery barrier film production technical field, and in particular to one kind is available for lithium ion battery separator to exist
The winding core freely breathed during storage.
Background technology
Although the performance quality of lithium ion battery separator is somewhat dependent on its property of raw material and film production work
The advance of skill, but barrier film is in process of production, particularly how to ensure that properties of product are not reduced during following process
It is one of core technology of lithium ion battery separator production.In existing barrier film production procedure, barrier film is after the completion of drilling
Location mode, processing mode etc. are the main cause of separator product performance reduction, according to incompletely statistics, lithium ion battery separator
It is because the mode of follow-up processing and storage is unreasonable that the reason for having 80%, which can be reduced,.Therefore, the architectural feature of refill is wound
It is to influence one of key technology of lithium battery diaphragm properties of product.
Winding core used in traditional lithium ion battery separator production is generally the paper roll core of high intensity, to paper roll core
The roughness on surface, concentricity of paper roll core etc. have strict requirements, therefore general paper roll wicking surface can all carry out waxing throwing
Light and core dynamic balancing detection etc..Production process septation is tightly wrapped in bright and clean paper tube surface, causes what is contacted with paper roll
Barrier film can not make do not have enough air in diaphragm micro-hole with air contact.Barrier film in this state overlong time when will
Form the damage that can not recover；If the concentricity of paper roll core is not enough, circular runout can be produced in membrane winding, barrier film is caused
Winding tension is inconsistent, during membrane winding, sometimes tightly, sometimes loose, barrier film can also produce in this case damage or cause every
Film properties it is inconsistent.After paper roll core use time is longer, its surface wax is worn and torn and causes core rough surface uneven, Jin Erzao
Into diaphragm injury.Several aspects can cause the decline of barrier film quality and performance above.
The content of the invention
For above technical problem, the present invention provide a kind of lithium ion battery with high resiliency and highly-breathable bed course every
Film winds core, and at least part of solution prior art is not enough.
It is to be available for lithium ion battery separator in storage there is provided one kind that the present invention, which solves the not enough technical scheme of prior art,
It is arranged with the winding core freely breathed, including cylindric hard core, the side wall of the cylindric hard core by micropore material
The ventilative bed course of long tubular prepared by material.
On the basis of above-mentioned technical proposal, the present invention can do technological improvement further below.
Further, the poromerics is polyurethane micropore elastomer material.
Further, the polyurethane micropore elastomer material is MDI types or TDI types, and its density is 0.4~0.7g/cm3,
Its aperture is 0.5~8 μm.
Further, the thickness of the ventilative bed course is 0.25~2cm.
Further, the section of the cylindric hard core radially is annular.
Further, the cylindric hard core is made up of paper or stainless steel.
Beneficial effects of the present invention are that the long tubular air-permeable mattress prepared by poromerics is arranged in the lateral wall of hard core
Layer, winding barrier film after, internal layer barrier film can by breathe freely bed course microcellular structure be connected with outside air, can freely " breathing " sky
Gas, it is ensured that diaphragm micro-hole will not be caused to close with air contact because of difficult during internal layer barrier film long-term storage, so that the property of barrier film
It can decline；Microporous polyurethane elastomeric material is common conventional porous structural material, and it is manufactured and moulding process is ripe；Density is
0.4~0.7g/cm3And the MDI types or TDI type polyurethane elastic materials with voids that aperture is 0.5~8 μm, with high resiliency, height thoroughly
Gas and suitable intensity, by the elasticity of the ventilative bed course of its making, it is ensured that free shrink or stretching, extension when barrier film is deposited, it is ensured that
The smooth and uniformity of barrier film film surface in following process；Polyurethane material is wear-resistant and surface relative smooth, can eliminate core
Because of the uneven damage to barrier film of rough surface；Polyurethane material is wear-resistant and has certain intensity, can eliminate paper roll core concentricity
Circular runout in not caused enough wrapup procedure.
Brief description of the drawings
Fig. 1 winds the structural representation of core for the barrier film for being arranged ventilative bed course that the present invention is provided；
Fig. 2 is the structural representation after the barrier film winding core winding lithium ion battery separator shown in Fig. 1.
In accompanying drawing, the list of parts representated by each label is as follows：
1st, hard core, 2, ventilative bed course, 3, lithium ion battery separator.
Embodiment
The principle and feature of the present invention are described below in conjunction with accompanying drawing, the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the present invention.
As shown in Figures 1 and 2, the present invention provides a kind of winding for being available for lithium ion battery separator freely to be breathed in storage
The long cylinder prepared by poromerics is arranged with core, including cylindric hard core 1, the side wall of the cylindric hard core 1
Shape is breathed freely bed course 2, and lithium ion battery separator 3 can be wound on the ventilative bed course 2 when using.
On the basis of above-mentioned technical proposal, the present invention can do technological improvement further below.
Further, the poromerics is polyurethane micropore elastomer material.
Further, the polyurethane micropore elastomer material is MDI types or TDI types, and its density is 0.4~0.7g/cm3,
Its aperture is 0.5~8 μm.
Further, the thickness of the ventilative bed course is 0.25~2cm.
Further, the section of the cylindric hard core 1 radially is annular.
Further, the cylindric hard core 1 is made up of paper or stainless steel.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc. should be included in the scope of the protection.
Claims (4)
1. a kind of winding core for being available for lithium ion battery separator freely to be breathed in storage, including cylindric hard core (1), its
It is characterised by, the ventilative bed course of long tubular prepared by poromerics is arranged with the side wall of the cylindric hard core (1)
(2), the poromerics is polyurethane micropore elastomer material, and the polyurethane micropore elastomer material is MDI types or TDI
Type, its density is 0.4~0.7g/cm3, its aperture is 0.5~8 μm, after winding barrier film, and internal layer barrier film can pass through bed course of breathing freely
(2) connected with outside air.
2. the winding core according to claim 1 for being available for lithium ion battery separator freely to be breathed in storage, its feature exists
In the thickness of the ventilative bed course (2) is 0.25~2cm.
3. the winding core that lithium ion battery separator is freely breathed in storage is available for according to any one of claim 1~2,
Characterized in that, the section of the cylindric hard core (1) radially is annular.
4. the winding core that lithium ion battery separator is freely breathed in storage is available for according to any one of claim 1~2,
Characterized in that, the cylindric hard core (1) is made up of paper or stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510569724.2A CN105118945B (en) | 2015-09-09 | 2015-09-09 | A kind of winding core for being available for lithium ion battery separator freely to be breathed in storage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510569724.2A CN105118945B (en) | 2015-09-09 | 2015-09-09 | A kind of winding core for being available for lithium ion battery separator freely to be breathed in storage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105118945A CN105118945A (en) | 2015-12-02 |
| CN105118945B true CN105118945B (en) | 2017-11-03 |
Family
ID=54666882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510569724.2A Active CN105118945B (en) | 2015-09-09 | 2015-09-09 | A kind of winding core for being available for lithium ion battery separator freely to be breathed in storage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105118945B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106601961B (en) * | 2017-02-20 | 2023-08-08 | 南通耐维特电源有限公司 | Lithium battery convenient for exhausting of battery core coiled material |
| CN111196869A (en) * | 2018-11-19 | 2020-05-26 | 北京市建筑工程研究院有限责任公司 | Three-dimensional microporous breathable template for concrete and preparation method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5918586B2 (en) * | 2012-03-26 | 2016-05-18 | 長岡産業株式会社 | Winding core |
| CN203048322U (en) * | 2012-11-15 | 2013-07-10 | 昆山市健侑科技有限公司 | Tube core with buffer material thin film |
| CN204927393U (en) * | 2015-09-09 | 2015-12-30 | 武汉惠强新能源材料科技有限公司 | Can supply lithium ion battery diaphragm respiratory rolling core of freedom when depositing |
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2015
- 2015-09-09 CN CN201510569724.2A patent/CN105118945B/en active Active
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| Publication number | Publication date |
|---|---|
| CN105118945A (en) | 2015-12-02 |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| GR01 | Patent grant | ||
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A winding core for lithium ion battery diaphragm to breathe freely during storage Effective date of registration: 20220622 Granted publication date: 20171103 Pledgee: Bank of China Limited Wuhan Jianghan sub branch Pledgor: HUIQIANG (WUHAN) NEW ENERGY MATERIAL TECHNOLOGY CO.,LTD. Registration number: Y2022420000176 |