CN209709068U - A kind of lithium ion battery separator resistant to high temperature - Google Patents
A kind of lithium ion battery separator resistant to high temperature Download PDFInfo
- Publication number
- CN209709068U CN209709068U CN201920388294.8U CN201920388294U CN209709068U CN 209709068 U CN209709068 U CN 209709068U CN 201920388294 U CN201920388294 U CN 201920388294U CN 209709068 U CN209709068 U CN 209709068U
- Authority
- CN
- China
- Prior art keywords
- lithium ion
- high temperature
- resistant
- ion battery
- heat
- 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.)
- Active
Links
Classifications
-
- 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
Landscapes
- Cell Separators (AREA)
- Secondary Cells (AREA)
Abstract
The utility model belongs to battery diaphragm technical field, more particularly to a kind of lithium ion battery separator resistant to high temperature, including fiber pedestal, membrane body and fiber grid layer, the fiber grid layer is adhered to the surface of the membrane body, the membrane body and the fiber grid layer are fixedly connected with the inner wall of the pedestal, the membrane body includes polyimide base film, heat resistant ceramic coatings and heat conducting ceramic coating have been respectively coated in two surfaces of the polyimide base film, the polyimide base film, heat resistant ceramic coatings and heat conducting ceramic coating are provided with the arc micropore between several arc micropores and every layer and correspond and be mutually communicated, the inner wall surface of the arc micropore is provided with ptc layer, the utility model has heat-resisting quantity strong, safety coefficient is high, the advantages of stable mechanical performance.
Description
Technical field
The utility model belongs to battery diaphragm technical field, and in particular to a kind of lithium ion battery separator resistant to high temperature.
Background technique
The efficient green energy of the lithium ion battery as a new generation, because it is high with energy density, self discharge is small, output is electric
The advantages that pressure is high, without memory, and be widely used in every profession and trade, the electric car especially quickly grown in recent years, more
It is to become its main power output, at the same time, the safety issue of lithium ion battery is also the weight that people pay close attention to always
Point.Wherein, the diaphragm that compartmentation is played to the anode of battery and cathode plays very important work to the safety of battery
With.
Traditional lithium battery diaphragm generallys use the materials such as polyethylene (PE) and polypropylene (PP) as basement membrane, but these
The fusing point of material is all relatively low, is generally no more than 180 °C, and when the ambient temperature of battery work is excessively high or interior
The overtension or overlong time of portion's charge and discharge can all cause to generate excessive heat in closed battery system, to make base
Film is likely to occur fusing；On the other hand, the mechanical performance of existing battery diaphragm is not good enough, assembling process, expanded by heating all
It is easy to happen fold, influences battery performance, and be also easy breakage in collision.
In view of this, being improved it is necessory to the battery diaphragm to the prior art, to improve the high temperature resistance of battery
And mechanical performance.
Utility model content
The purpose of this utility model is that: a kind of lithium ion battery resistant to high temperature provided in view of the deficiencies of the prior art
Diaphragm, the diaphragm have the advantages that heat-resisting quantity is strong, safety coefficient is high, stable mechanical performance.
In order to achieve the above object, the utility model uses following technical scheme:
A kind of lithium ion battery separator resistant to high temperature, including fiber pedestal, membrane body and fiber grid layer, the fiber grid
Layer is adhered to the surface of the membrane body, and the membrane body and the fiber grid layer are fixedly connected with the inner wall of the pedestal, institute
Stating membrane body includes polyimide base film, and heat resistant ceramic coatings and thermally conductive have been respectively coated in two surfaces of the polyimide base film
Ceramic coating, the polyimide base film, heat resistant ceramic coatings and heat conducting ceramic coating be provided with several arc micropores and
The arc micropore between every layer is corresponded and is mutually communicated, and the inner wall surface of the arc micropore is provided with ptc material
Layer.
As the improvement of lithium ion battery separator resistant to high temperature described in the utility model, the thickness of the polyimide base film
Degree is 8 ~ 20um.If polyimide base film is too thin, it is be easy to cause breakage, is unfavorable for improving the heat resistance of diaphragm；If polyamides is sub-
Amido film is too thick, then can reduce the energy density of battery.
As the improvement of lithium ion battery separator resistant to high temperature described in the utility model, the thickness of the heat resistant ceramic coatings
Degree is 1 ~ 10um.If the too thin heat resistance for being unfavorable for improving diaphragm of heat resistant ceramic coatings；It will affect the energy of battery if too thick
Metric density.
As the improvement of lithium ion battery separator resistant to high temperature described in the utility model, the thickness of the heat conducting ceramic coating
Degree is 1.5 ~ 10um.If heat conducting ceramic coating is too thin effectively to be conducted heat and be dispersed；It will affect if too thick
The energy density of battery.
As the improvement of lithium ion battery separator resistant to high temperature described in the utility model, the thickness of the ptc layer
For 0.08 ~ 0.2um.If ptc layer is too thin, effectively arc micropore cannot be closed；It can if ptc layer is too thick
Reduce the shuttle rate of lithium ion.
As the improvement of lithium ion battery separator resistant to high temperature described in the utility model, the heat resistant ceramic coatings include
Heat-stable ceramic particle, binder and dispersing agent, the heat-stable ceramic particle are aluminium oxide, zirconium oxide or silica.
As the improvement of lithium ion battery separator resistant to high temperature described in the utility model, the heat conducting ceramic coating includes
Thermal conductive ceramic particle, binder and dispersing agent, thermal coefficient >=80W/ (mK) of the thermal conductive ceramic particle.
As the improvement of lithium ion battery separator resistant to high temperature described in the utility model, the thermal conductive ceramic particle is carbon
SiClx, beryllium oxide or aluminium nitride.
As the improvement of lithium ion battery separator resistant to high temperature described in the utility model, the fusing of the ptc layer
Temperature is 100 ~ 120 °C.
Compared with the prior art, the utility model has the beneficial effects that:
1) the utility model has selected polyimides more resistant to high temperature as basement membrane, it is ensured that basement membrane is long-term at high temperature
It uses, in addition, being also coated with one layer of heat resistant ceramic coatings in polyimide base film, further improves the resistance to height of diaphragm entirety
Warm ability effectively prevent polyimide base film to melt at high temperature and leads to short circuit, improves the safety of battery；
2) the utility model is coated with heat conducting ceramic coating, heat conducting ceramic coating on the another side of polyimide base film
Heat can be conducted to rapidly when hot-spot occurs and is distributed to entire diaphragm in battery, restrained effectively diaphragm and locally send out
Heat is shunk, and the risk of battery short circuit is reduced；
3) by opening up arc micropore in polyimide base film, heat resistant ceramic coatings and heat conducting ceramic coating, improve every
The extension liquid ability of film, while also more expanded by heating spaces are provided for membrane body；
4) by the way that ptc layer is arranged on the surface of arc micropore, PTC is the semiconductor material with positive temperature coefficient,
It can be melted when the temperature of diaphragm is more than fusing point, arc micropore is closed, prevent electrolyte and electrode generation electrochemistry anti-
It answers, improves the safety of battery；
5) also the spatial stability and planarization of membrane body are improved, is prevented by setting fiber pedestal and fiber grid layer
There is fold in membrane body, while membrane body also being avoided to cause breakage in expanded by heating, enhances the service life of membrane body.
Detailed description of the invention
Attached drawing described herein is used to provide a further understanding of the present invention, and constitutes one of the utility model
Point, the exemplary embodiment and its explanation of the utility model are not constituted for explaining the utility model to the utility model
Improper restriction.In the accompanying drawings:
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the cross section structure schematic diagram of the utility model；
Wherein, 1- fiber pedestal；2- membrane body；3- fiber grid layer；4- polyimide base film；5- heat resistant ceramic coatings；6-
Heat conducting ceramic coating；7- arc micropore；8-PTC material layer.
Specific embodiment
As used some vocabulary to censure specific components in the specification and claims.Those skilled in the art answer
It is understood that hardware manufacturer may call the same component with different nouns.This specification and claims are not with name
The difference of title is as the mode for distinguishing component, but with the difference of component functionally as the criterion of differentiation.Such as logical
The "comprising" of piece specification and claim mentioned in is an open language, therefore should be construed to " include but do not limit
In "." substantially " refer within an acceptable error range, those skilled in the art can within a certain error range solve described in
Technical problem basically reaches the technical effect.
In the description of the present invention, it should be understood that term " on ", "lower", "front", "rear", "left", "right",
The orientation or positional relationship of the instructions such as level " is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description originally
Utility model and simplified description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific
Orientation construction and operation, therefore should not be understood as limiting the present invention.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood as the case may be
Concrete meaning in the present invention.
The utility model is described in further detail below in conjunction with attached drawing, but not as the restriction to the utility model.
As shown in Figure 1 and 2, a kind of lithium ion battery separator resistant to high temperature, including fiber pedestal 1, membrane body 2 and fiber grid
Layer 3, fiber grid layer 3 is adhered to the surface of membrane body 2, and membrane body 2 and fiber grid layer 3 are fixedly connected with the inner wall of pedestal 1, fine
Wiki frame 1 and fiber grid layer 3 are effectively guaranteed the spatial stability and planarization of membrane body 2, prevent membrane body 2 from fold occur,
It also avoids membrane body 2 from causing breakage in expanded by heating simultaneously, the service life of membrane body 2 is enhanced, in addition, membrane body 2 further includes gathering
Heat resistant ceramic coatings 5 and heat conducting ceramic coating 6 have been respectively coated in two surfaces of acid imide basement membrane 4, polyimide base film 4, lead
Heat can be conducted and be distributed to entire diaphragm by thermal Ceramics coating 6, thus prevent diaphragm due to caused by local pyrexia heat receive
Contracting phenomenon, and heat resistant ceramic coatings 5 can then further strengthen the heat resistance of polyimide base film 4, make it steadily in high temperature
Under worked normally, it is micro- that polyimide base film 4, heat resistant ceramic coatings 5 and heat conducting ceramic coating 6 are provided with several arcs
Arc micropore 7 between hole 7 and every layer is corresponded and is mutually communicated, and in actual operation, arc micropore 7 not only can be improved
The extension liquid ability of diaphragm, moreover it is possible to certain expansion space, the inner wall surface setting of arc micropore 7 are provided when heated for membrane body 2
There is ptc layer 8.
Preferably, polyimide base film 4 with a thickness of 8 ~ 20um, this thickness range can guarantee the heat-resisting of battery diaphragm
Performance reaches most preferably, if polyimide base film 4 is too thin, it is poor to will lead to mechanical performance, be easy to cause breakage；If polyimide-based
Film 4 is too thick, then can occupy more battery space, to reduce the energy density of battery.
Preferably, heat resistant ceramic coatings 5 with a thickness of 1 ~ 10um, which can further strengthen the heat-resisting of diaphragm
Property, if the too thin heat resistance for being unfavorable for improving diaphragm of heat resistant ceramic coatings 5；Battery space can be occupied if too thick, influences electricity
The energy density in pond.
Preferably, heat conducting ceramic coating 6 with a thickness of 1.5 ~ 10um, which can make leading for heat conducting ceramic coating 6
Thermal effect reaches most preferably, cannot effectively heat be conducted and be dispersed if heat conducting ceramic coating 6 is too thin；And thermal conductive ceramic
Certain battery space can be also occupied if coating 6 is too thick, influences the energy density of battery.
Preferably, ptc layer 8 with a thickness of 0.08 ~ 0.2um, the fusion temperature of ptc layer 8 is 100 ~ 120 °C,
If ptc layer 8 is too thin, when temperature is more than its fusing point, will lead to it cannot be closed arc micropore 7 in fusing,
Electrolyte and electrode cannot be effectively blocked to continue that electrochemical reaction occurs；Arc micropore can be occupied if ptc layer 8 is too thick
7 space, reduces the shuttle rate of lithium ion, to reduce the performance of battery.
Preferably, heat resistant ceramic coatings 5 include heat-stable ceramic particle, binder and dispersing agent, and heat-stable ceramic particle is oxygen
Change aluminium, zirconium oxide or silica.
Preferably, heat conducting ceramic coating 6 includes thermal conductive ceramic particle, binder and dispersing agent, wherein thermal conductive ceramic particle
For silicon carbide, beryllium oxide or aluminium nitride, thermal coefficient >=80W/ (mK) of thermal conductive ceramic particle, ensure that battery heating compared with
When fast or local pyrexia, heat can quickly be conducted to and is distributed to entire diaphragm, diaphragm is restrained effectively and locally occur
It is heat-shrinked, reduces the risk of battery short circuit.
Several preferred embodiments of the utility model have shown and described in above description, but as previously described, it should be understood that
The utility model is not limited to forms disclosed herein, and is not to be taken as the exclusion to other embodiments, and can be used for
Other combinations, modifications, and environments, and above-mentioned introduction or correlation can be passed through within the scope of the inventive concept described herein
The technology or knowledge in field are modified.And changes and modifications made by those skilled in the art do not depart from the spirit of the utility model
And range, then it all should be in the protection scope of the appended claims for the utility model.
Claims (9)
1. a kind of lithium ion battery separator resistant to high temperature, it is characterised in that: including fiber pedestal (1), membrane body (2) and fiber grid
Layer (3), the fiber grid layer (3) are adhered to the surface of the membrane body (2), the membrane body (2) and the fiber grid layer (3)
It is fixedly connected with the inner wall of the pedestal (1), the membrane body (2) includes polyimide base film (4), the polyimide base film
(4) two surfaces have been respectively coated heat resistant ceramic coatings (5) and heat conducting ceramic coating (6), the polyimide base film (4),
Heat resistant ceramic coatings (5) and heat conducting ceramic coating (6) are provided with the arc between several arc micropores (7) and every layer
Micropore (7) is corresponded and is mutually communicated, and the inner wall surface of the arc micropore (7) is provided with ptc layer (8).
2. lithium ion battery separator resistant to high temperature according to claim 1, it is characterised in that: the polyimide base film
(4) with a thickness of 8 ~ 20um.
3. lithium ion battery separator resistant to high temperature according to claim 1, it is characterised in that: the heat resistant ceramic coatings
(5) with a thickness of 1 ~ 10um.
4. lithium ion battery separator resistant to high temperature according to claim 1, it is characterised in that: the heat conducting ceramic coating
(6) with a thickness of 1.5 ~ 10um.
5. lithium ion battery separator resistant to high temperature according to claim 1, it is characterised in that: the ptc layer (8)
With a thickness of 0.08 ~ 0.2um.
6. lithium ion battery separator resistant to high temperature according to claim 1, it is characterised in that: the heat resistant ceramic coatings
It (5) include heat-stable ceramic particle, binder and dispersing agent, the heat-stable ceramic particle is aluminium oxide, zirconium oxide or silica.
7. lithium ion battery separator resistant to high temperature according to claim 1, it is characterised in that: the heat conducting ceramic coating
It (6) include thermal conductive ceramic particle, binder and dispersing agent, thermal coefficient >=80W/ (mK) of the thermal conductive ceramic particle.
8. lithium ion battery separator resistant to high temperature according to claim 7, it is characterised in that: the thermal conductive ceramic particle is
Silicon carbide, beryllium oxide or aluminium nitride.
9. lithium ion battery separator resistant to high temperature according to claim 1, it is characterised in that: the ptc layer (8)
Fusion temperature is 100 ~ 120 °C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920388294.8U CN209709068U (en) | 2019-03-25 | 2019-03-25 | A kind of lithium ion battery separator resistant to high temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920388294.8U CN209709068U (en) | 2019-03-25 | 2019-03-25 | A kind of lithium ion battery separator resistant to high temperature |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209709068U true CN209709068U (en) | 2019-11-29 |
Family
ID=68645459
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920388294.8U Active CN209709068U (en) | 2019-03-25 | 2019-03-25 | A kind of lithium ion battery separator resistant to high temperature |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209709068U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114300808A (en) * | 2021-12-31 | 2022-04-08 | 珠海冠宇电池股份有限公司 | Diaphragm and battery comprising same |
| CN114976473A (en) * | 2022-06-08 | 2022-08-30 | 派恩(中山)科技有限公司 | Modified cellulose membrane used for high-temperature lithium ion battery diaphragm |
-
2019
- 2019-03-25 CN CN201920388294.8U patent/CN209709068U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114300808A (en) * | 2021-12-31 | 2022-04-08 | 珠海冠宇电池股份有限公司 | Diaphragm and battery comprising same |
| CN114976473A (en) * | 2022-06-08 | 2022-08-30 | 派恩(中山)科技有限公司 | Modified cellulose membrane used for high-temperature lithium ion battery diaphragm |
| CN114976473B (en) * | 2022-06-08 | 2024-05-07 | 派恩(中山)科技有限公司 | Modified cellulose membrane for high-temperature lithium ion battery separator |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106684458B (en) | A kind of lithium ion battery and preparation method thereof improving low temperature charge-discharge performance | |
| JP6451506B2 (en) | Electrode manufacturing method | |
| CN209709068U (en) | A kind of lithium ion battery separator resistant to high temperature | |
| KR100971345B1 (en) | Electrode assembly and rechargeable battery comprising the same | |
| CN105470523A (en) | Lithium ion power battery with high safety performance | |
| CN110416490A (en) | A kind of based lithium-ion battery positive plate that can provide dual security protection for taking into account energy density | |
| JP2004327183A (en) | Battery and its manufacturing method | |
| JP2019185883A (en) | Fuel cell | |
| JP5665209B1 (en) | Membrane electrode assembly, method for producing the same, and polymer electrolyte fuel cell | |
| CN108615590B (en) | Composite thermistor material, thermistor lug and lithium ion battery | |
| WO1999067836A9 (en) | Cell and method of producing the same | |
| WO2012137618A1 (en) | Molten salt cell | |
| CN209571500U (en) | A kind of lithium ion battery | |
| CN109860951A (en) | A kind of core strueture of the electric storage device of high efficiency and heat radiation | |
| CN109256499A (en) | A kind of glass-sealed seal assembly of aluminum hull power battery electrode pole and its method for sealing | |
| CN113013546A (en) | Organic/inorganic particle coating composite diaphragm, preparation method and battery | |
| CN209571475U (en) | A kind of compound tab and lithium ion battery | |
| CN109888357A (en) | A kind of solid oxide fuel cell power generating system and its application method | |
| CN205810930U (en) | The lithium battery diaphragm of improvement | |
| CN106252747B (en) | A kind of shell structure and preparation method thereof for liquid metal cell | |
| CN205543116U (en) | Overbrushing layer negative pole polymer lithium ion secondary cell | |
| WO2022067511A1 (en) | Electrode assembly and manufacturing method therefor, and lithium battery | |
| US20010036575A1 (en) | Battery and method for preparing the same | |
| CN209401799U (en) | A kind of core strueture of the electric storage device of high efficiency and heat radiation | |
| CN209045627U (en) | A kind of glass-sealed seal assembly of aluminum hull power battery electrode pole |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |