CN105280862A - Preparation method of cooled lithium battery diaphragm - Google Patents
Preparation method of cooled lithium battery diaphragm Download PDFInfo
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- CN105280862A CN105280862A CN201510587385.0A CN201510587385A CN105280862A CN 105280862 A CN105280862 A CN 105280862A CN 201510587385 A CN201510587385 A CN 201510587385A CN 105280862 A CN105280862 A CN 105280862A
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- fiber
- lithium battery
- polymer nanofiber
- barrier film
- nanofiber material
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4235—Safety or regulating additives or arrangements in electrodes, separators or electrolyte
-
- 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
- H01M50/411—Organic material
-
- 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
- H01M50/44—Fibrous material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2200/00—Safety devices for primary or secondary batteries
- H01M2200/10—Temperature sensitive devices
-
- 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 preparation method of a cooled lithium battery diaphragm. The preparation method comprises the following steps of taking a polymer nanofiber material and ethylene-propylene side by side (ES) fiber as raw materials, and sequentially carrying out processes of opening, mixing, mechanically carding, hot rolling and winding to prepare the cooled lithium battery diaphragm with a surface density of 20 to 35 g/cm<2>, wherein the proportion of the polymer nanofiber material and the ES fiber in the diaphragm is 3:7 or 5:5 or 7:3. The preparation method of the cooled lithium battery diaphragm, disclosed by the invention, has the characteristics of simplicity in process flow and convenience in operation, and the prepared lithium battery diaphragm has favorable heat dissipation performance.
Description
Technical field
The present invention relates to a kind of preparation method of heat-dissipating type lithium battery barrier film.
Background technology
Lithium ion battery is primarily of positive electrode, negative material, electrolyte, the large material composition of barrier film four.Its septation is the microporous film be placed between battery plus-negative plate, and it makes lithium ion freely pass through, and blocks the direct contact of both positive and negative polarity with preventing short circuit simultaneously.
And automatically shut down a kind of safeguard protection performance that protective value is lithium ion battery separator, be the effective ways that lithium ion battery limit temperature raised and prevented short circuit.The closed pore temperature of barrier film and melt fracture temperature are the major parameters of this performance.Closed pore temperature refer to external short circuit or improper big current by time the heat that produces make diaphragm micro-hole inaccessible time temperature.Melt fracture temperature refers to and heats, barrier film when temperature exceedes temperature when sample fusing point makes sample break.Because battery short circuit makes internal temperature of battery raise, when battery isolating film temperature arrives closed pore temperature, micropore obturation blocking-up electric current passes through, but thermal inertia can make temperature rise further, likely reaches melt fracture temperature and causes membrane ruptures, battery short circuit.Therefore, closed pore temperature and melt fracture temperature difference are the bigger the better, and now the fail safe of battery is better.
But in the microporous polyolefin film that commercial Li-ion battery barrier film adopts at present, the closed pore temperature of polyethene microporous membrane is 130 DEG C ~ 140 DEG C, if temperature continues to rise, because its melt fracture temperature is very low, fail safe is not high enough, easily blasts.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provides a kind of preparation method of heat-dissipating type lithium battery barrier film.The preparation method of a kind of heat-dissipating type lithium battery barrier film of the present invention, have technological process simple, easy to operate, obtained lithium battery diaphragm has the feature of good heat dispersion.
In order to achieve the above object, technical scheme of the present invention is:
A kind of preparation method of heat-dissipating type lithium battery barrier film, comprise with polymer nanofiber material (RaytheonCompany Ray Thcon, 20 ~ 30nm) and ES fiber (Cixi Feng Yuan chemical fibre Co., Ltd, PE/PP) be raw material, successively by shredding, mixing, mechanical carding, hot rolling, Lap Technology, obtained a kind of surface density is 20 ~ 35g/m
2heat-dissipating type lithium battery barrier film; Polymer nanofiber material in wherein said barrier film and the proportioning of ES fiber are: 3:7 or 5:5 or 7:3.
Described opening adopts Thibeau(France Thibeau) opener by polymer nanofiber material and ES fiber reinforced cement composite, make polymer nanofiber material and ES fiber become fritter or pencil by tearing; Described hybrid technique adopts the multi-mixer of Thibeau to make after opening in fritter or the polymer nanofiber material of pencil and ES fiber Homogeneous phase mixing; Described mechanical carding technique adopts the carding machine of Thibeau, further shredding is carried out and removal of impurities to the polymer nanofiber material after hybrid technique and ES fiber, polymer nanofiber material is mixed further with ES fiber, bulk polymer nano-fiber material and ES fiber are carded to pencil, be carded to single fiber shape again, fiber carding the most at last, wherein doffer speed is 90 ~ 110m/min; Described hot rolling technology adopts the hot-rolling mill of Thibeau to be reinforced by the fleece of carding, and make ES fibers melt, cooling, entanglement by hot roll, play the effect of reinforcing, hot-rolled temperature is wherein 130 ~ 145 DEG C; Described Lap Technology adopts the up-coiler of Thibeau by hot rolling lithium battery diaphragm winding packing out.
Described polymer nanofiber Heat Conduction Material is a kind of nanofiber of hollow, and its diameter is 20-30nm, has good insulating properties, at 200 DEG C, still has extreme high reliability; Described ES fiber is a kind of core-skin type composite bicomponent fiber, and cortex is PE, and its fusing point is 130 DEG C, and sandwich layer is PP, and its fusing point is 165 DEG C, and component ratio is 50:50, and its fineness is 1.3D ~ 1.5D.
The invention has the beneficial effects as follows: the preparation method of a kind of heat-dissipating type lithium battery barrier film of the present invention, with polymer nanofiber material and ES fiber for raw material, proportioning between the content of feed change and raw material, dissimilar lithium battery diaphragm can be obtained, obtained lithium battery diaphragm has different surface densities, shows different mechanical performances and heat conductivility; By hot rolling technology, obtained a kind of heat-dissipating type lithium battery barrier film.When lithium battery external short circuit or improper big current pass through, a large amount of heats can be produced, when the ES fiber in its (fusing point of ES fiber is 130 DEG C) after reaching 130 DEG C carries out melting closed pore; When temperature rises further, heat conduction in lithium battery can effectively be gone out by the polymer nanofiber material in this barrier film, now temperature rising slowly or is no longer risen and (is produced heat in lithium battery, if heat production is few, heat conduction can be gone out by polymer nanofiber material, and temperature can not rise; If heat production is many, but polymer nanofiber material heat conduction is limited, can not be instant be all conducted by heat, temperature can slowly rise), delay or avoid the time of lithium battery diaphragm generation membrane ruptures, battery short circuit, play good security performance; Usually in barrier film, polymer nanofiber material is 200 DEG C time, or stable, and the situation such as membrane ruptures, battery short circuit can not occur, and (polymer nanofiber material is 200 DEG C time, stable, melting can not occur, so barrier film can not break, battery can not short circuit); Relative to traditional TPO barrier film, this lithium battery diaphragm, technological process is simple, and easy to operate, obtained lithium battery diaphragm has good heat dispersion.
Embodiment
Embodiment 1
The preparation method of a kind of heat-dissipating type lithium battery barrier film of the present embodiment, the polymer nanofiber material in this barrier film and the proportioning of ES fiber are 3:7.The diameter of polymer nanofiber Heat Conduction Material is the fineness of 20nm, ES fiber is 1.3D.First adopting the opener of Thibeau by polymer nanofiber material and ES fiber reinforced cement composite, making polymer nanofiber material and ES fiber become fritter or pencil by tearing; Then the multi-mixer of Thibeau is adopted to make polymer nanofiber material and the ES fiber Homogeneous phase mixing of fritter or pencil; Adopt the carding machine of Thibeau again, further shredding polymer nanofiber material is with ES fiber and removal of impurities, mixed further by polymer nanofiber material, bulk polymer nano-fiber material and ES fiber are carded to pencil with ES fiber, then is carded to single fiber shape, by fiber carding; Wherein doffer speed is 90m/min; Then adopt the hot-rolling mill of Thibeau to be reinforced by combing fibre web out, make ES fibers melt, cooling, entanglement by hot roll, obtained surface density is 20g/m
2lithium battery diaphragm, hot-rolled temperature is wherein 130 DEG C; Finally adopt the up-coiler of Thibeau by hot rolling lithium battery diaphragm winding packing out.
The preparation method of a kind of heat-dissipating type lithium battery barrier film of the present embodiment, with polymer nanofiber material and ES fiber for raw material, proportioning between the content of feed change and raw material, dissimilar lithium battery diaphragm can be obtained, obtained lithium battery diaphragm has different surface densities, shows different mechanical performances and heat conductivility; By hot rolling technology, obtained a kind of heat-dissipating type lithium battery barrier film.When lithium battery external short circuit or improper big current pass through, a large amount of heats being produced, carrying out melting closed pore when reaching 130 DEG C of later ES fibers wherein; When temperature rises further, heat conduction in lithium battery can effectively be gone out by the polymer nanofiber material in this barrier film, now temperature rising slowly or is no longer risen, and delays or avoids the time of lithium battery diaphragm generation membrane ruptures, battery short circuit, play good security performance; Usually in barrier film, polymer nanofiber material is 200 DEG C time, or stable, and the situation such as membrane ruptures, battery short circuit can not occur; Relative to traditional TPO barrier film, this lithium battery diaphragm, technological process is simple, and easy to operate, obtained lithium battery diaphragm has good heat dispersion.
Embodiment 2
The preparation method of a kind of heat-dissipating type lithium battery barrier film of the present embodiment, the polymer nanofiber material in this barrier film and the proportioning of ES fiber are 5:5.The diameter of polymer nanofiber Heat Conduction Material is the fineness of 25nm, ES fiber is 1.4D.First adopting the opener of Thibeau by polymer nanofiber material and ES fiber reinforced cement composite, making polymer nanofiber material and ES fiber become fritter or pencil by tearing; Then the multi-mixer of Thibeau is adopted to make polymer nanofiber material and the ES fiber Homogeneous phase mixing of fritter or pencil; Adopt the carding machine of Thibeau again, further shredding polymer nanofiber material is with ES fiber and removal of impurities, mixed further by polymer nanofiber material, bulk polymer nano-fiber material and ES fiber are carded to pencil with ES fiber, then is carded to single fiber shape, by fiber carding; Wherein doffer speed is 100m/min; Then adopt the hot-rolling mill of Thibeau to be reinforced by combing fibre web out, make ES fibers melt, cooling, entanglement by hot roll, obtained surface density is 30g/m
2lithium battery diaphragm, hot-rolled temperature is wherein 140 DEG C; Finally adopt the up-coiler of Thibeau by hot rolling lithium battery diaphragm winding packing out.
The preparation method of a kind of heat-dissipating type lithium battery barrier film of the present embodiment, with polymer nanofiber material and ES fiber for raw material, proportioning between the content of feed change and raw material, dissimilar lithium battery diaphragm can be obtained, obtained lithium battery diaphragm has different surface densities, shows different mechanical performances and heat conductivility; By hot rolling technology, obtained a kind of heat-dissipating type lithium battery barrier film.When lithium battery external short circuit or improper big current pass through, a large amount of heats being produced, carrying out melting closed pore when reaching 130 DEG C of later ES fibers wherein; When temperature rises further, heat conduction in lithium battery can effectively be gone out by the polymer nanofiber material in this barrier film, now temperature rising slowly or is no longer risen, and delays or avoids the time of lithium battery diaphragm generation membrane ruptures, battery short circuit, play good security performance; Usually in barrier film, polymer nanofiber material is 200 DEG C time, or stable, and the situation such as membrane ruptures, battery short circuit can not occur; Relative to traditional TPO barrier film, this lithium battery diaphragm, technological process is simple, and easy to operate, obtained lithium battery diaphragm has good heat dispersion.
Embodiment 3
The preparation method of a kind of heat-dissipating type lithium battery barrier film of the present embodiment, the polymer nanofiber material in this barrier film and the proportioning of ES fiber are 7:3.The diameter of polymer nanofiber Heat Conduction Material is the fineness of 30nm, ES fiber is 1.5D.First adopting the opener of Thibeau by polymer nanofiber material and ES fiber reinforced cement composite, making polymer nanofiber material and ES fiber become fritter or pencil by tearing; Then the multi-mixer of Thibeau is adopted to make polymer nanofiber material and the ES fiber Homogeneous phase mixing of fritter or pencil; Adopt the carding machine of Thibeau again, further shredding polymer nanofiber material is with ES fiber and removal of impurities, mixed further by polymer nanofiber material, bulk polymer nano-fiber material and ES fiber are carded to pencil with ES fiber, then is carded to single fiber shape, by fiber carding; Wherein doffer speed is 110m/min; Then adopt the hot-rolling mill of Thibeau to be reinforced by combing fibre web out, make ES fibers melt, cooling, entanglement by hot roll, obtained surface density is 35g/m
2lithium battery diaphragm, hot-rolled temperature is wherein 145 DEG C; Finally adopt the up-coiler of Thibeau by hot rolling lithium battery diaphragm winding packing out.
The preparation method of a kind of heat-dissipating type lithium battery barrier film of the present embodiment, with polymer nanofiber material and ES fiber for raw material, proportioning between the content of feed change and raw material, dissimilar lithium battery diaphragm can be obtained, obtained lithium battery diaphragm has different surface densities, shows different mechanical performances and heat conductivility; By hot rolling technology, obtained a kind of heat-dissipating type lithium battery barrier film.When lithium battery external short circuit or improper big current pass through, a large amount of heats being produced, carrying out melting closed pore when reaching 130 DEG C of later ES fibers wherein; When temperature rises further, heat conduction in lithium battery can effectively be gone out by the polymer nanofiber material in this barrier film, now temperature rising slowly or is no longer risen, and delays or avoids the time of lithium battery diaphragm generation membrane ruptures, battery short circuit, play good security performance; Usually in barrier film, polymer nanofiber material is 200 DEG C time, or stable, and the situation such as membrane ruptures, battery short circuit can not occur; Relative to traditional TPO barrier film, this lithium battery diaphragm, technological process is simple, and easy to operate, obtained lithium battery diaphragm has good heat dispersion.
Claims (3)
1. a preparation method for heat-dissipating type lithium battery barrier film, is characterized in that: comprise with polymer nanofiber material and ES fiber for raw material, and successively by shredding, mixing, mechanical carding, hot rolling, Lap Technology, obtained a kind of surface density is 20 ~ 35g/m
2heat-dissipating type lithium battery barrier film; Polymer nanofiber material in wherein said barrier film and the proportioning of ES fiber are: 3:7 or 5:5 or 7:3.
2. the preparation method of a kind of heat-dissipating type lithium battery barrier film as claimed in claim 1, it is characterized in that: described opening adopts the opener of Thibeau by polymer nanofiber material and ES fiber reinforced cement composite, makes polymer nanofiber material and ES fiber become fritter or pencil by tearing; Described hybrid technique adopts the multi-mixer of Thibeau to make after opening in fritter or the polymer nanofiber material of pencil and ES fiber Homogeneous phase mixing; Described mechanical carding technique adopts the carding machine of Thibeau, further shredding is carried out and removal of impurities to the polymer nanofiber material after hybrid technique and ES fiber, polymer nanofiber material is mixed further with ES fiber, bulk polymer nano-fiber material and ES fiber are carded to pencil, be carded to single fiber shape again, fiber carding the most at last, wherein doffer speed is 90 ~ 110m/min; Described hot rolling technology adopts the hot-rolling mill of Thibeau to be reinforced by the fleece of carding, and make ES fibers melt, cooling, entanglement by hot roll, play the effect of reinforcing, hot-rolled temperature is wherein 130 ~ 145 DEG C; Described Lap Technology adopts the up-coiler of Thibeau by hot rolling lithium battery diaphragm winding packing out.
3. the preparation method of a kind of heat-dissipating type lithium battery barrier film as claimed in claim 1 or 2, it is characterized in that: described polymer nanofiber Heat Conduction Material is a kind of nanofiber of hollow, and its diameter is 20-30nm, has good insulating properties, at 200 DEG C, still there is extreme high reliability; Described ES fiber is a kind of core-skin type composite bicomponent fiber, and cortex is PE, and its fusing point is 130 DEG C, and sandwich layer is PP, and its fusing point is 165 DEG C, and component ratio is 50:50, and its fineness is 1.3D ~ 1.5D.
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| CN201510587385.0A CN105280862A (en) | 2015-09-16 | 2015-09-16 | Preparation method of cooled lithium battery diaphragm |
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| CN201510587385.0A CN105280862A (en) | 2015-09-16 | 2015-09-16 | Preparation method of cooled lithium battery diaphragm |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111341977A (en) * | 2020-03-23 | 2020-06-26 | 成都新柯力化工科技有限公司 | Diaphragm for new energy automobile power lithium battery and preparation method |
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| CN101153429A (en) * | 2006-09-25 | 2008-04-02 | 天津工业大学 | Method for producing septum substrate cloth of nickel-hydrogen battery with sulphonation method and septum substrate cloth of nickel-hydrogen battery |
| CN102496464A (en) * | 2011-12-09 | 2012-06-13 | 莱州联友金浩新型材料有限公司 | Super capacitance battery diaphragm, preparing method thereof and application thereof |
| CN103469484A (en) * | 2013-09-13 | 2013-12-25 | 仪征市荣胜电池隔膜有限公司 | Nickel-metal hydride battery diaphragm base material production method |
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2015
- 2015-09-16 CN CN201510587385.0A patent/CN105280862A/en active Pending
Patent Citations (4)
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| CN101153429A (en) * | 2006-09-25 | 2008-04-02 | 天津工业大学 | Method for producing septum substrate cloth of nickel-hydrogen battery with sulphonation method and septum substrate cloth of nickel-hydrogen battery |
| CN1952240A (en) * | 2006-11-17 | 2007-04-25 | 刘畅 | Composite felt made of waste wool, waste terylene, and composite fiber |
| CN102496464A (en) * | 2011-12-09 | 2012-06-13 | 莱州联友金浩新型材料有限公司 | Super capacitance battery diaphragm, preparing method thereof and application thereof |
| CN103469484A (en) * | 2013-09-13 | 2013-12-25 | 仪征市荣胜电池隔膜有限公司 | Nickel-metal hydride battery diaphragm base material production method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111341977A (en) * | 2020-03-23 | 2020-06-26 | 成都新柯力化工科技有限公司 | Diaphragm for new energy automobile power lithium battery and preparation method |
| CN111341977B (en) * | 2020-03-23 | 2021-08-27 | 李龙德 | Diaphragm for new energy automobile power lithium battery and preparation method |
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