CN109256515A - A kind of membrane configuration, lithium cell and lithium battery using the membrane configuration - Google Patents
A kind of membrane configuration, lithium cell and lithium battery using the membrane configuration Download PDFInfo
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- CN109256515A CN109256515A CN201811064577.3A CN201811064577A CN109256515A CN 109256515 A CN109256515 A CN 109256515A CN 201811064577 A CN201811064577 A CN 201811064577A CN 109256515 A CN109256515 A CN 109256515A
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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
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/431—Inorganic 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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
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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
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/411—Organic 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
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/446—Composite material consisting of a mixture of organic and inorganic materials
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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
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/449—Separators, membranes or diaphragms characterised by the material having a layered structure
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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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Chemical & Material Sciences (AREA)
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- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
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- Manufacturing & Machinery (AREA)
- Inorganic Chemistry (AREA)
- Composite Materials (AREA)
- Secondary Cells (AREA)
- Cell Separators (AREA)
Abstract
The invention discloses a kind of membrane configuration, use the lithium cell and lithium battery of the membrane configuration.The membrane configuration includes at least be stacked one heat resistance diaphragm and a hole closure diaphragm with hole closure function with heat resistance.In the case where overheat condition occurs for battery, has the characteristics that hole closure function occurs for the hole closure diaphragm of low hole closed temperature, inhibit the accumulation of gentle solution heat.Simultaneously there is the heat resistance diaphragm of high-fire resistance to be able to maintain membrane configuration entirety stability, prevent under overheat because membrane configuration occur thermal contraction due to cause positive and negative anodes directly contact caused by short circuit phenomenon generation, to improve the security performance of battery.
Description
Technical field
The present invention relates to battery technology field more particularly to a kind of membrane configuration, using the lithium cell of the membrane configuration with
And lithium battery.
Background technique
Since lithium ion battery has, energy density is high, voltage is high, have extended cycle life, big multiplying power discharging, self discharge are low, ring
The advantages such as guarantor, have been widely used in the field 3C, electric car and energy storage field.Lithium ion battery technology obtains continuous
Progress, wherein being the main direction of development of lithium ion battery in high-energy density direction.In power battery, from initial phosphorus
Sour lithium iron battery, is gradually transitions the low nickel NCM111 ternary lithium ion battery of higher energy density, then toward more high nickel content
Ternary lithium ion battery development, such as NCM523, NCM622 even NCM811.
However, the lithium ion battery that energy density is higher, security performance are poorer.Lithium ion battery energy density not
While disconnected raising, higher requirements are also raised to security performance by people.Improve the safety of lithium ion battery with high energy density
Performance is one of the key factor for promoting lithium ion battery with high energy density application.
The method for improving of lithium ion battery security usually has material doped modification, material coating modification, mixed security
High positive electrode, introduces flame-retardant electrolyte additive, is explosion-proof using ceramic diaphragm, Package casing pole piece coating cladding
Design etc..Cobalt acid lithium and ternary material, which mix a certain proportion of LiMn2O4, can improve the security performance of battery, but to cycle performance
It has a certain impact with high-temperature behavior.
Summary of the invention
The purpose of the present invention is being directed to the above-mentioned lower defect of lithium battery safety of the existing technology, provide it is a kind of every
Membrane structure, lithium cell and lithium battery using the membrane configuration, to improve the security performance of lithium battery.
The technical solution adopted by the present invention is that a kind of membrane configuration is proposed, for the positive electrode and negative electrode of lithium battery, institute to be isolated
It states membrane configuration and includes at least be stacked the one heat resistance diaphragm with heat resistance and a hole with hole closure function
It is closed diaphragm.
Preferably, the membrane configuration only includes the heat resistance diaphragm with heat resistance being stacked and one has
The hole of hole closure function is closed diaphragm.
Preferably, the heat resisting temperature of the heat resistance diaphragm is greater than 300 DEG C.
Preferably, the heat resistance diaphragm be ceramic diaphragm or apply Kynoar diaphragm or polyimide diaphragm or
One of nonwoven cloth diaphragm or inorganic organic mixing diaphragm.
Preferably, the heat resistance diaphragm is provided with multilayer, and the heat resistance diaphragm is ceramic diaphragm or painting polyvinylidene fluoride
One of alkene diaphragm or polyimide diaphragm or nonwoven cloth diaphragm or inorganic organic mixing diaphragm are a variety of.
Preferably, the hole closed temperature range of the hole closure diaphragm is at 100-130 DEG C.
Preferably, hole closure diaphragm be polyethylene diagrams or Kynoar every mixed with polyethylene diagrams every
One of film.
Preferably, the hole closure diaphragm is provided with multilayer, and the hole closure diaphragm is polyethylene diagrams or polyvinylidene fluoride
Alkene is every one of diaphragm mixed with polyethylene diagrams or a variety of.
Preferably, the heat resistance diaphragm with a thickness of 10-30 microns.
Preferably, hole closure diaphragm with a thickness of 5-10 microns.
Preferably, it is together with each other between the heat resistance diaphragm and hole closure diaphragm.
Preferably, glue is combined by hot binding between the heat resistance diaphragm and hole closure diaphragm or by coating
It is combined.
Preferably, the membrane configuration further includes at least one layer of high strength diaphragm and/or one layer of guarantor's liquid diaphragm.
The present invention also provides a kind of lithium cell, including anode, cathode and membrane configuration simultaneously, and the membrane configuration is upper
State any membrane configuration.
Preferably, the hole closure diaphragm with hole closure function is towards cathode, and the heat resistance diaphragm is towards anode.
The present invention also provides a kind of lithium battery simultaneously comprising as above any membrane configuration.
Compared with prior art, the beneficial effects of the present invention are: membrane configuration of the invention is set due to including at least stacking
One set is closed diaphragm with the heat resistance diaphragm of heat resistance and a hole with hole closure function, and enthusiasm occurred in battery
Under condition, has the characteristics that hole closure function occurs for the hole closure diaphragm of low hole closed temperature, inhibit the accumulation of gentle solution heat.Simultaneously
Heat resistance diaphragm with high-fire resistance is able to maintain the stability of membrane configuration entirety, prevents under overheat because membrane configuration occurs
Be heat-shrinked and cause positive and negative anodes directly contact caused by short circuit phenomenon generation, to improve the security performance of battery.This
Kind can be improved lithium ion battery safety performance from membrane configuration and reach, simple and easy, and structure is simply easy to mass production.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of lithium cell of the present invention.
Fig. 2 is the structural schematic diagram under lithium cell overheated condition of the present invention.
Fig. 3 is schematic diagram on fire under the lithium cell overheated condition of common diaphragm.
Fig. 4 is schematic diagram on fire under the lithium cell overheated condition of common diaphragm.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings and examples.
The invention proposes a kind of membrane configurations, and as shown in Figs. 1-2, the present invention provides a kind of membrane configurations 4, are used for
The positive 1b and cathode 1a of lithium battery is isolated, it is heat-resisting with heat resistance that the membrane configuration 4 includes at least one be stacked
Property diaphragm 42 and one with hole closure function hole be closed diaphragm 41.There is heat resistance due to including at least be stacked one
Heat resistance diaphragm 42 and one with hole closure function hole be closed diaphragm 41, battery occur overheat condition under, have it is low
Hole closure function occurs for the hole closure diaphragm 41 of hole closed temperature feature, inhibits the accumulation of gentle solution heat in this way.Have simultaneously
The heat resistance diaphragm 42 of high-fire resistance is able to maintain the stability of membrane configuration entirety, prevents under overheat because membrane configuration 4 occurs
Be heat-shrinked and cause positive 1b, cathode 1a directly contact caused by short circuit phenomenon generation, to improve the safety of battery
Performance.This from membrane configuration 4 to can be improved lithium ion battery safety performance enough, simple and easy, and structure is simply easy to batch
Metaplasia produces.
In the present embodiment, the heat resisting temperature of the heat resistance diaphragm 42 is greater than 300 DEG C, in this way, diaphragm can be kept
Structure 4 is whole to be still able to maintain structural stability under overheat condition, and avoiding being heat-shrinked causes positive 1b, cathode 1a directly to contact.
As an alternative embodiment, the heat resistance diaphragm 42 can for ceramic diaphragm or apply Kynoar every
Film (PVDF) or one of polyimide diaphragm (PI) or nonwoven cloth diaphragm or inorganic organic mixing diaphragm.
When heat resistance diaphragm 42 has one layer, a kind of optional above-mentioned material is as heat resistance diaphragm, when with multilayer
When, then can with Ceramics diaphragm or apply Kynoar diaphragm (PVDF) or polyimide diaphragm (PI) or non-woven fabrics every
One of film or inorganic organic mixing diaphragm, so that entire membrane configuration is other than with better heat resistance, moreover it is possible to have
The subsidiary sexual function of others, such as improve puncture intensity, promoted and protect liquid measure function.
In the present embodiment, the hole closed temperature range of the hole closure diaphragm 41 is at 100-130 DEG C, at such a temperature,
Hole is closed diaphragm 41 and shrinks in time, can enter cathode in this way to avoid excessive lithium ion and heat is caused largely to accumulate.
As an alternative embodiment, the hole closure diaphragm 41 can be polyethylene diagrams (PE) or polyvinylidene fluoride
Alkene is every one of the diaphragm mixed with polyethylene diagrams.
When hole, closure diaphragm 41 has one layer, a kind of optional above-mentioned material is closed diaphragm as hole, when with multilayer
When, then polyethylene diagrams (PE) or Kynoar can be selected every one of diaphragm mixed with polyethylene diagrams or more
Kind.
For example, for there is two layers of heat resistance diaphragm 42 and two holes closure diaphragm 41, at this point, heat resistance diaphragm can be with
Ceramic diaphragm is respectively adopted and applies Kynoar diaphragm, and hole closure diaphragm can then use polyethylene diagrams and polyvinylidene fluoride
Alkene is every the diaphragm mixed with polyethylene diagrams.
In the present embodiment, the thickness of the heat resistance diaphragm 42 can be selected between 10-30 microns, the thickness in the section
In the case of, heat resistance diaphragm 42 has good heat resistance and structural retention energy.
In the present embodiment, hole closure diaphragm 41 with a thickness of 5-10 microns, under the depth information in the section, hole
Being closed diaphragm 41 has good thermal contraction efficiency, the effective accumulation for inhibiting heat.
In the present embodiment, it is together with each other between the heat resistance diaphragm 42 and hole closure diaphragm 41, this
Sample can keep the structural stability of entire membrane configuration 4, processing easy to produce, meanwhile, it is also convenient in electric core winding, it will be whole
A membrane configuration 4 is wound.
In the present embodiment, by hot binding or can lead between the heat resistance diaphragm 42 and hole closure diaphragm 41
It crosses coating to be combined in conjunction with glue, can be PVDF glue or other glue with binding performance in conjunction with glue, heated after coating
In conjunction with.Hot pressing is combined using heat resistance diaphragm 42 when combining glue effective and hole closure diaphragm 41, and bond strength is good,
Stability is high.
Certainly, with multi-layered property diaphragm 42 or perforated closure diaphragm 41 in the case where, adjacent heat resistance every
It can also be by hot pressing or by being combined in conjunction with glue, likewise, can also between adjacent hole closure diaphragm 41 between film 42
To be combined by hot pressing or by combination glue, in this way, making all heat resistance diaphragms 42 and all hole closure diaphragms
41 all combine, and form the membrane configuration 4 of a stable structure.
As further improvement of this embodiment, the membrane configuration further includes at least one layer of high strength diaphragm and/or one
Layer protects liquid diaphragm.For example, increasing one or more layers following diaphragm: organic material diaphragm, braiding diaphragm, papery diaphragm, non-woven
Cloth diaphragm, non-woven fiberglass diaphragm, synthetic fibers diaphragm etc..
As shown in Figures 1 and 2, the present invention also provides a kind of lithium cell, including positive 1b, cathode 1a and diaphragm knot simultaneously
Structure 4, the membrane configuration 4 are membrane configuration 4 described above.
In this embodiment, the hole closure diaphragm 41 with hole closure function is towards cathode 1a, the heat resistance every
Film 42 is towards positive 1b.In this way, hole closure diaphragm 41 can avoid lithium ion from entering cathode and lead well in overheat contraction
Cause overheat.
Certainly, in the present embodiment, hole is closed diaphragm 41 can also be towards positive 1b.
The present invention also provides a kind of lithium battery simultaneously comprising as above any membrane configuration.
The present invention from the angle of membrane configuration improve lithium ion battery safety, the method generally used be commonly every
Coated ceramic coating on film.The thermal stability of ceramic diaphragm is improved, and can prevent battery when overheating because of membrane configuration
Contraction caused by internal short-circuit phenomenon generation.However, diaphragm itself has while the thermal stability of ceramic diaphragm improves
Some hole closure function failures, in occurring when external short circuit, cannot effectively inhibit the accumulation of heat, eventually lead to thermal runaway.Relatively
In ceramic diaphragm, the present invention guarantees the hole closure of membrane configuration while membrane configuration thermal stability itself improves well
Function.The present invention is guaranteeing diaphragm using the combination with heat resistance and hole closing performance diaphragm from the angle of membrane configuration
While thermal stability, while there is hole closure function at a lower temperature.Diaphragm with high heat resistance is heat-shrinked
Rate is small or does not shrink substantially, plays the diaphragm of hole closure function without conventional percent thermal shrinkage, as its percent thermal shrinkage can be put
It is wide within 10%.Its closed pore temperature can be lower than 130 °C, therefore, to the range of choice of diaphragm without conventional 130 °C or so
It is wide very much.Using the lithium ion battery of this double membrane configurations, the short circuit safety of lithium ion battery is significantly improved.It is this to mention
The method of high-lithium ion battery security is simple and easy, provides a kind of side to improve the safety of lithium ion battery with high energy density
Method.
For making the just high energy density polymer lithium ion battery of extremely NCM622, design capacity is
2800mAh.Anode formula is NCM622:SP(conductive black): PVDF (Kynoar)=96:2:2, cathode formula are artificial
Graphite: SP:CMC(sodium carboxymethylcellulose): SBR(butadiene-styrene rubber)=94.5:2:1.5:2.By preparing positive and negative anodes slurry respectively
Material, positive and negative anodes coating, positive and negative anodes about, positive and negative anodes slitting, film-making, wind, enter shell encapsulation, baking moisture removal, fluid injection, chemical conversion,
After fixture baking, two envelopes and partial volume, forming battery is obtained.The membrane configuration of the present embodiment uses the good ceramic diaphragm of heat resistance
Double membrane configurations of the polyalkenes diaphragm (with a thickness of 5 microns) of (with a thickness of 20 microns) and hole closed temperature lower (about 120 °C).
According to different types of diaphragm, three kinds of different types of batteries are made.
For three kinds of different types of poly-lithium batteries, battery short circuit test, test are carried out after being simultaneously filled with electricity
Structure such as the following table 1:
| Number | 1 | 2 | 3 |
| Voltage/V before testing | 4.17 | 4.169 | 4.177 |
| Internal resistance/m Ω before testing | 28.3 | 27.3 | 27.5 |
| Maximum short circuit current/A | 60 | 57 | 59 |
| Phenomenon | Slightly flatulence | Slightly flatulence | Slightly flatulence |
According to upper table it is found that using the present embodiment membrane configuration lithium battery, maintain good structural stability in testing.
As shown in connection with fig. 2, under overheat condition, heat resistance diaphragm 42 has good structural retention energy, and hole closure diaphragm 41 can
Hole closure protection is carried out in time, is effectively avoided heat accumulation, is reached good hole closing performance.
As the comparison of test, also provided below comparative example one and comparative example two.
Comparative example one
In order to compare the safety of double membrane configurations, the diaphragm that this comparative example one uses for common diaphragm (with a thickness of 7 microns, hole
130-135 °C of closed temperature).Three kinds of different lithium batteries are made also according to the type of diaphragm, such battery carries out short-circuit survey
After examination, there are two batteries, and phenomenon on fire occurs for three batteries, and test result is shown in such as the following table 2:
| Number | 1 | 2 | 3 |
| Voltage/V before testing | 4.18 | 4.178 | 4.177 |
| Internal resistance/m Ω before testing | 28.7 | 28.1 | 27.9 |
| Maximum short circuit current/A | 78 | 76 | 76 |
| Phenomenon | Battery core is burnt | Slightly flatulence | Battery core is burnt |
If Fig. 3 shows the case where one battery core of comparative example is burnt schematic diagram, under overheat condition, common diaphragm 3 is heat-shrinked,
Positive and negative anodes short circuit is caused to occur on fire.
Comparative example two
In order to compare the safety of double membrane configurations, the diaphragm that this comparative example two uses is (thick for the good ceramic diaphragm of heat resistance
Degree is 20 microns).Three batteries are made also according to diaphragm type, after such battery carries out short-circuit test, three batteries have one
Phenomenon on fire occurs for a battery, and test result is shown in such as the following table 3:
| Number | 1 | 2 | 3 |
| Voltage/V before testing | 4.18 | 4.176 | 4.175 |
| Internal resistance/m Ω before testing | 28.1 | 27.6 | 28.9 |
| Maximum short circuit current/A | 54 | 65 | 61 |
| Phenomenon | Flatulence | Flatulence | It burns |
If Fig. 4 shows the case where two battery core of comparative example is burnt schematic diagram, under overheat condition, ceramic diaphragm 2 can keep good
Under good structure saves, however hole closing performance is also influenced simultaneously, cause positive and negative anodes short circuit to occur on fire.
It follows that the membrane configuration 4 in the present embodiment in the case where overheat condition occurs for battery, has low hole closed temperature special
Hole closure function occurs for the hole closure diaphragm 41 of point, inhibits the accumulation of gentle solution heat in this way.There is the resistance to of high-fire resistance simultaneously
Hot diaphragm 42 is able to maintain the stability of membrane configuration entirety, prevents under overheat because membrane configuration 4 occurs to cause due to thermal contraction
Positive 1b, cathode 1a directly contact caused by short circuit phenomenon generation, to improve the security performance of battery.
Above-described embodiment is merely to illustrate a specific embodiment of the invention.It should be pointed out that for the general of this field
For logical technical staff, without departing from the inventive concept of the premise, several deformations and variation can also be made, these deformations and
Variation all should belong to protection scope of the present invention.
Claims (16)
1. a kind of membrane configuration, for the positive electrode and negative electrode of lithium battery to be isolated, which is characterized in that the membrane configuration includes at least
One be stacked is closed diaphragm with the heat resistance diaphragm of heat resistance and a hole with hole closure function.
2. membrane configuration according to claim 1, which is characterized in that the membrane configuration, which includes one layer, has heat resistance
Heat resistance diaphragm and one layer of hole with hole closure function are closed diaphragm.
3. membrane configuration according to claim 1 or 2, which is characterized in that the heat resisting temperature of the heat resistance diaphragm is greater than
300℃。
4. membrane configuration according to claim 2 or 3, which is characterized in that the heat resistance diaphragm is ceramic diaphragm or applies
One of Kynoar diaphragm or polyimide diaphragm or nonwoven cloth diaphragm or inorganic organic mixing diaphragm.
5. membrane configuration according to claim 1 or 3, which is characterized in that the heat resistance diaphragm is provided with multilayer, described
Heat resistance diaphragm is ceramic diaphragm or applies Kynoar diaphragm or polyimide diaphragm or nonwoven cloth diaphragm or inorganic have
One of machine mixing diaphragm is a variety of.
6. membrane configuration according to claim 1, which is characterized in that the hole closed temperature range of the hole closure diaphragm exists
100-130℃。
7. membrane configuration described according to claim 1 or 2 or 6, which is characterized in that hole closure diaphragm be polyethylene every
Film or Kynoar are every one of the diaphragm mixed with polyethylene diagrams.
8. membrane configuration according to claim 1 or 6, which is characterized in that the hole closure diaphragm is provided with multilayer, described
It is polyethylene diagrams or Kynoar every one of diaphragm mixed with polyethylene diagrams or a variety of that hole, which is closed diaphragm,.
9. the membrane configuration stated according to claim 1, which is characterized in that the heat resistance diaphragm with a thickness of 10-30 microns.
10. membrane configuration according to claim 1, which is characterized in that hole closure diaphragm with a thickness of 5-10 microns.
11. membrane configuration according to claim 1, which is characterized in that the heat resistance diaphragm and the hole are closed diaphragm
Between be together with each other.
12. membrane configuration according to claim 11, which is characterized in that the heat resistance diaphragm and the hole are closed diaphragm
Between be combined by hot binding or by coating in conjunction with glue.
13. membrane configuration according to claim 1, which is characterized in that the membrane configuration further includes at least one layer of high-strength
Spend diaphragm and/or one layer of guarantor's liquid diaphragm.
14. a kind of lithium cell, including anode, cathode and membrane configuration, which is characterized in that the membrane configuration is claim
Any membrane configuration of 1-13.
15. lithium cell as claimed in claim 14, which is characterized in that it is described with hole closure function hole closure diaphragm towards
Cathode, the heat resistance diaphragm is towards anode.
16. a kind of lithium battery, which is characterized in that including the membrane configuration as described in claim 1-13 is any.
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| CN201811064577.3A CN109256515A (en) | 2018-09-12 | 2018-09-12 | A kind of membrane configuration, lithium cell and lithium battery using the membrane configuration |
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| CN201811064577.3A CN109256515A (en) | 2018-09-12 | 2018-09-12 | A kind of membrane configuration, lithium cell and lithium battery using the membrane configuration |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110518178A (en) * | 2019-09-05 | 2019-11-29 | 江苏厚生新能源科技有限公司 | Polymer battery separator and preparation method thereof with inierpeneirating network structure |
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| CN85108034A (en) * | 1985-11-04 | 1987-07-22 | 国家建筑材料工业局南京玻璃纤维研究设计院 | Fibreglass diaphragm for lithium cell |
| CN101209609A (en) * | 2006-12-30 | 2008-07-02 | 比亚迪股份有限公司 | Polyolefin composite thin film and preparation and application thereof |
| CN102064300A (en) * | 2010-12-25 | 2011-05-18 | 佛山塑料集团股份有限公司 | Porous composite diaphragm for lithium ion secondary battery and preparation method thereof |
| CN108172746A (en) * | 2017-12-28 | 2018-06-15 | 成都市银隆新能源有限公司 | A kind of lithium battery diaphragm |
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2018
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85108034A (en) * | 1985-11-04 | 1987-07-22 | 国家建筑材料工业局南京玻璃纤维研究设计院 | Fibreglass diaphragm for lithium cell |
| CN101209609A (en) * | 2006-12-30 | 2008-07-02 | 比亚迪股份有限公司 | Polyolefin composite thin film and preparation and application thereof |
| CN102064300A (en) * | 2010-12-25 | 2011-05-18 | 佛山塑料集团股份有限公司 | Porous composite diaphragm for lithium ion secondary battery and preparation method thereof |
| CN108172746A (en) * | 2017-12-28 | 2018-06-15 | 成都市银隆新能源有限公司 | A kind of lithium battery diaphragm |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110518178A (en) * | 2019-09-05 | 2019-11-29 | 江苏厚生新能源科技有限公司 | Polymer battery separator and preparation method thereof with inierpeneirating network structure |
| WO2021042928A1 (en) * | 2019-09-05 | 2021-03-11 | 江苏厚生新能源科技有限公司 | Polymer battery diaphragm having interpenetrating network structure, and preparation method therefor |
| US11901579B2 (en) | 2019-09-05 | 2024-02-13 | Jiangsu Horizon New Energy Tech Co., Ltd. | Polymer battery separator with interpenetrating network structure and preparation method thereof |
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