CN105406004A - Diaphragm for lithium-ion battery roll core - Google Patents
Diaphragm for lithium-ion battery roll core Download PDFInfo
- Publication number
- CN105406004A CN105406004A CN201510879103.4A CN201510879103A CN105406004A CN 105406004 A CN105406004 A CN 105406004A CN 201510879103 A CN201510879103 A CN 201510879103A CN 105406004 A CN105406004 A CN 105406004A
- Authority
- CN
- China
- Prior art keywords
- ion battery
- barrier film
- lithium ion
- coil core
- film
- 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
-
- 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
-
- 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
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/431—Inorganic material
-
- 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
Abstract
The invention discloses a diaphragm for a lithium-ion battery roll core. A ceramic membrane is adopted; a preparation method of the diaphragm for the lithium-ion battery roll core comprises the following production processes of: extracting a thin-film for producing the diaphragm for the lithium-ion battery roll core in an extracting agent; and drying the extracted thin film. By the diaphragm for the lithium-ion battery roll core in the technical scheme, the ceramic membrane prepared through a wet process is taken as the diaphragm for a lithium-ion battery; the apertures of micropores in the diaphragm are effectively reduced; and distribution of the micropores is relatively uniform, so that a short circuit of the diaphragm due to the fact that metal fragments are embedded into the micropores when the lithium-ion battery is used is avoided; and the short circuit ratio of the lithium-ion battery roll core is controlled.
Description
Technical field
The present invention relates to a kind of cell internal components, especially a kind of lithium ion battery coil core barrier film.
Background technology
Barrier film in lithium ion battery coil core is one of lithium ion battery necessary parts in the course of the work, and it directly affects the service behaviour of lithium ion battery.Existing barrier film is with in lithium ion battery use procedure, and metal fragment can occur often, and to embed barrier film inner, and at least short circuit phenomenon appears in barrier film, and then causes lithium ion battery normally to work; Meanwhile, the impact of its physical attribute received by existing barrier film, and its working strength Shortcomings, makes barrier film in use very easily be damaged.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of lithium ion battery coil core barrier film, and it effectively can improve the working strength of barrier film, and barrier film short circuit phenomenon is controlled.
For solving the problems of the technologies described above, the present invention relates to a kind of lithium ion battery coil core barrier film, it adopts ceramic membrane, and the preparation method of lithium ion battery coil core barrier film includes following production technology:
1) by fixed mixing ratio, feeding is carried out to lithium ion battery coil core barrier film raw material and pore former, and by extruder, mixed processing is extruded to the barrier film raw material of fixed mixing ratio and pore former;
2) by sharp cooling roll, material mixed in step 1) is cooled and slab process, make it form sheet material;
3) to step 2) in sheet material carry out synchronous bidirectional stretching, with make sheet material formed film, and by stretch after film collect rolling;
4) film completing stretching in step 3) is placed in the extraction that extractant carries out pore former;
5) drying and processing is carried out, until extractant evaporates completely to the film completing extraction in step 4);
6) to completing steps 5) film that processes processes by demand size, makes it be formed to be suitable for the barrier film of lithium ion battery coil core.
In above-mentioned production technology, described barrier film raw material adopts polyethylene and alundum (Al2O3), and wherein polyethylene is material resin, and alundum (Al2O3) is ceramic base material; Described pore former adopts white oil, and extractant adopts carrene.
As a modification of the present invention, after described lithium ion battery coil core barrier film completes processing, under hyperbaric environment, charging process need be carried out to it.
Adopt the lithium ion battery coil core barrier film of technique scheme, its ceramic membrane by wet-layer preparation is as the barrier film of lithium ion battery, barrier film internal capillary aperture is effectively reduced, and its distribution is more even, thus avoid barrier film with lithium ion battery in use, cause barrier film short circuit because metal fragment embeds in micropore, and then the short circuit ratio of lithium ion battery coil core is controlled.Meanwhile, the preparation method of the application's septation makes the tensile strength of barrier film and anti-puncture intensity be improved, and avoids barrier film in use breakage to occur.
Embodiment
Below in conjunction with embodiment, illustrate the present invention further, following embodiment should be understood and be only not used in for illustration of the present invention and limit the scope of the invention.
A kind of lithium ion battery coil core barrier film, it adopts ceramic membrane, and the preparation method of lithium ion battery coil core barrier film includes following production technology:
1) by fixed mixing ratio, feeding is carried out to lithium ion battery coil core barrier film raw material and pore former, and by extruder, mixed processing is extruded to the barrier film raw material of fixed mixing ratio and pore former;
2) by sharp cooling roll, material mixed in step 1) is cooled and slab process, make it form sheet material;
3) to step 2) in sheet material carry out synchronous bidirectional stretching, with make sheet material formed film, and by stretch after film collect rolling;
4) film completing stretching in step 3) is placed in the extraction that extractant carries out pore former;
5) drying and processing is carried out, until extractant evaporates completely to the film completing extraction in step 4);
6) to completing steps 5) film that processes processes by demand size, makes it be formed to be suitable for the barrier film of lithium ion battery coil core.
In above-mentioned production technology, described barrier film raw material adopts polyethylene and alundum (Al2O3), and wherein polyethylene is material resin, and alundum (Al2O3) is ceramic base material; Described pore former adopts polyvinylpyrrolidone, and extractant adopts carrene.
As a modification of the present invention, after described lithium ion battery coil core barrier film completes processing, under hyperbaric environment, charging process need be carried out to it; Described hyperbaric environment is carry out work under the limiting voltage of lithium ion battery.
Adopt the lithium ion battery coil core barrier film of technique scheme, its ceramic membrane by wet-layer preparation is as the barrier film of lithium ion battery, barrier film internal capillary aperture is effectively reduced, and its distribution is more even, thus avoid barrier film with lithium ion battery in use, cause barrier film short circuit because metal fragment embeds in micropore, and then the short circuit ratio of lithium ion battery coil core is controlled.Meanwhile, the preparation method of the application's septation makes the tensile strength of barrier film and anti-puncture intensity be improved, and avoids barrier film in use breakage to occur.
Claims (2)
1. a lithium ion battery coil core barrier film, is characterized in that, described lithium ion battery coil core barrier film adopts ceramic membrane, and the preparation method of lithium ion battery coil core barrier film includes following production technology:
1) by fixed mixing ratio, feeding is carried out to lithium ion battery coil core barrier film raw material and pore former, and by extruder, mixed processing is extruded to the barrier film raw material of fixed mixing ratio and pore former;
2) by sharp cooling roll, material mixed in step 1) is cooled and slab process, make it form sheet material;
3) to step 2) in sheet material carry out synchronous bidirectional stretching, with make sheet material formed film, and by stretch after film collect rolling;
4) film completing stretching in step 3) is placed in the extraction that extractant carries out pore former;
5) drying and processing is carried out, until extractant evaporates completely to the film completing extraction in step 4);
6) to completing steps 5) film that processes processes by demand size, makes it be formed to be suitable for the barrier film of lithium ion battery coil core.
2. according to lithium ion battery coil core barrier film according to claim 1, it is characterized in that, after described lithium ion battery coil core barrier film completes processing, under hyperbaric environment, charging process need be carried out to it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510879103.4A CN105406004A (en) | 2015-12-05 | 2015-12-05 | Diaphragm for lithium-ion battery roll core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510879103.4A CN105406004A (en) | 2015-12-05 | 2015-12-05 | Diaphragm for lithium-ion battery roll core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105406004A true CN105406004A (en) | 2016-03-16 |
Family
ID=55471372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510879103.4A Pending CN105406004A (en) | 2015-12-05 | 2015-12-05 | Diaphragm for lithium-ion battery roll core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105406004A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109817890A (en) * | 2019-01-25 | 2019-05-28 | 东莞市创明电池技术有限公司 | The preparation method of lithium ion battery positive electrode |
| CN113506950A (en) * | 2021-07-09 | 2021-10-15 | 陕西科技大学 | Preparation method of pore-foaming agent regulated and controlled micro-nano porous structure aramid fiber nanofiber-based battery diaphragm |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102683628A (en) * | 2011-03-09 | 2012-09-19 | 天津东皋膜技术有限公司 | Co-extruded composite diaphragm containing nano pre-crosslinked rubber micropowder and lithium ion battery using co-extruded composite diaphragm |
| CN102709589A (en) * | 2012-02-17 | 2012-10-03 | 深圳新宙邦科技股份有限公司 | Lithium ion battery and electrolyte thereof |
| CN103928649A (en) * | 2014-04-10 | 2014-07-16 | 佛山市金辉高科光电材料有限公司 | Novel modified non-woven fabric lithium-ion battery diaphragm and preparation method thereof |
| CN104617248A (en) * | 2015-02-09 | 2015-05-13 | 刘会会 | Method for preparing nanometer ceramic particle doped PE diaphragm |
-
2015
- 2015-12-05 CN CN201510879103.4A patent/CN105406004A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102683628A (en) * | 2011-03-09 | 2012-09-19 | 天津东皋膜技术有限公司 | Co-extruded composite diaphragm containing nano pre-crosslinked rubber micropowder and lithium ion battery using co-extruded composite diaphragm |
| CN102709589A (en) * | 2012-02-17 | 2012-10-03 | 深圳新宙邦科技股份有限公司 | Lithium ion battery and electrolyte thereof |
| CN103928649A (en) * | 2014-04-10 | 2014-07-16 | 佛山市金辉高科光电材料有限公司 | Novel modified non-woven fabric lithium-ion battery diaphragm and preparation method thereof |
| CN104617248A (en) * | 2015-02-09 | 2015-05-13 | 刘会会 | Method for preparing nanometer ceramic particle doped PE diaphragm |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109817890A (en) * | 2019-01-25 | 2019-05-28 | 东莞市创明电池技术有限公司 | The preparation method of lithium ion battery positive electrode |
| CN113506950A (en) * | 2021-07-09 | 2021-10-15 | 陕西科技大学 | Preparation method of pore-foaming agent regulated and controlled micro-nano porous structure aramid fiber nanofiber-based battery diaphragm |
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Legal Events
| Date | Code | Title | Description |
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| 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 |
Application publication date: 20160316 |
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| RJ01 | Rejection of invention patent application after publication |