CN207611805U - A kind of lithium manganate battery diaphragm - Google Patents
A kind of lithium manganate battery diaphragm Download PDFInfo
- Publication number
- CN207611805U CN207611805U CN201721861398.3U CN201721861398U CN207611805U CN 207611805 U CN207611805 U CN 207611805U CN 201721861398 U CN201721861398 U CN 201721861398U CN 207611805 U CN207611805 U CN 207611805U
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- layer
- inorganic material
- diaphragm
- battery
- membrane
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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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Abstract
The utility model provides a kind of lithium manganate battery diaphragm, it includes membrane layer, inorganic material layer and bonding film layer, the membrane layer is two, inorganic material layer is set between two membrane layers, the lateral surface of each membrane layer is all provided with there are one being bonded film layer, and the inorganic material layer uses that nano ceramics is made and its thickness is 6~10um；It is using setting inorganic material layer and is bonded the structure of film layer to overcome defect of the prior art there are security risk, the high temperature resistance and adhesion properties of diaphragm can be improved, and the internal resistance of cell can be reduced, improves battery cycle life, overall structure is scientific and reasonable, simple and compact, easy to install and use；It is widely used in lithium battery and matches.
Description
Technical field
The utility model is related to lithium battery equipment more particularly to a kind of lithium manganate battery diaphragms.
Background technology
With the development of modern society, lithium ion battery is high with its energy density, it is excellent with voltage height etc. to have extended cycle life
Electrical property and rapidly developed, be widely used at present the electronics such as mobile phone, portable computer, camera or video camera production
Product field also can be used as the power supply needed for electric vehicle or hybrid electric vehicle.
Lithium battery structure septation is one of the interior layer assembly of key, and diaphragm is the main work between anode and cathode
It with being to separate positive and negative anodes active material, prevents the two poles of the earth short-circuit due to contact, in addition in electrochemical reaction, can keep necessary
Electrolyte with formed ion movement channel；Therefore the performance of diaphragm determines the interfacial structure of battery, internal resistance etc., direct shadow
The characteristics such as capacity, cycle and the security performance of battery are rung, the diaphragm haveing excellent performance has weight to the comprehensive performance for improving battery
The effect wanted.
Currently, it includes polyethylene or polypropylene diaphragm that the lithium battery diaphragm used in the market, which is mainly polyolefin, due to poly-
The fusing point of ethylene is about 140 DEG C, and polyacrylic fusing point is about 160 DEG C, when battery local temperature is increased to its fusing point, it is possible to
Exist when the fusing of diaphragm causes the positive and negative anodes contact due to of battery that short circuit occurs, therefore polyalkene diaphragm uses in lithium battery
Security risk；In addition, since polyalkene diaphragm viscosity is poor, the battery positive/negative plate after battery is made and is easy tod produce between diaphragm
Gap causes to fit closely together between anode, diaphragm, volt cathode three, be brought to the normal use of battery certain
Security risk.
Invention content
For the above situation, the purpose of this utility model is to provide a kind of lithium manganate battery diaphragms, it is using setting nothing
The structure of machine material layer and bonding film layer can improve the high temperature resistant of diaphragm to overcome defect of the prior art there are security risk
Performance and adhesion properties, overall structure is scientific and reasonable, simple and compact, easy to install and use, wide market, convenient for promoting
It uses.
To achieve the goals above, a kind of lithium manganate battery diaphragm, it includes membrane layer, inorganic material layer and adhesive film
Layer, the membrane layer are two, and inorganic material layer is set between two membrane layers, and the lateral surface of each membrane layer is equipped with one
A bonding film layer.
In order to realize that structure, effect optimization, further step be：The membrane layer uses polyethylene or polypropylene material
Material is made, and the thickness of membrane layer is 12~20um.
The inorganic material layer is made of nano ceramics, and the thickness of inorganic material layer is 6~10um.
The thickness of the bonding film layer is 5~8um.
Bonding way is carried out between both the inorganic material layer, membrane layer and bonding film layer are adjacent using painting to be fixedly connected.
The utility model compared with prior art caused by advantageous effect：
(I) the utility model is all provided with using the lateral surface of membrane layer there are one film layer is bonded, and passes through the viscosity on the outside of diaphragm
Substance improves the adhesive effect of battery positive/negative plate and diaphragm, ensures that diaphragm can be fitted closely with positive/negative plate very close to each other,
To prevent that analysis lithium phenomenon occurs during battery use, it can ensure the normal work of battery, and reduce the internal resistance of cell, improve
Battery cycle life and safety；
(II) the utility model using membrane layer lateral surface be all provided with there are one be bonded film layer, can protect diaphragm and enhance every
Film strength can prevent diaphragm from falling off, to avoid the local perforations on diaphragm from causing the micro-short circuit of battery, to improve
The security performance and service life of battery；
(III) the utility model can enhance the machinery of diaphragm itself using inorganic material layer is equipped between two membrane layers
Intensity, while the thermal contraction and fusing of polyalkene diaphragm can be prevented, to avoid battery plus-negative plate contact from causing battery short circuit,
So that damage battery, improves the high temperature protection function of battery diaphragm；
(IV) the utility model using setting inorganic material layer and is bonded the structure of film layer to overcome the prior art to exist
The defect of security risk, can improve the high temperature resistance and adhesion properties of diaphragm, and can reduce the internal resistance of cell, overall structure science
Rationally, simple and compact, it is easy to install and use, there is significant economic benefit and social benefit.
The utility model is widely used in lithium battery and matches.
The utility model is described in further detail with reference to the accompanying drawings and examples.
Description of the drawings
The attached drawing constituted part of this application is used to provide a further understanding of the present invention, the utility model
Illustrative embodiments and their description are not constituted improper limits to the present invention for explaining the utility model.
Fig. 1 is the overall structure diagram of the utility model.
In figure：1- membrane layers, 2- inorganic material layers, 3- are bonded film layer.
Specific implementation mode
Referring to Fig.1, the utility model is realized in this way：A kind of lithium manganate battery diaphragm, it includes membrane layer, inorganic material
The bed of material and bonding film layer, the membrane layer are two, and inorganic material layer is set between two membrane layers, outside each membrane layer
Side is bonded film layer there are one being all provided with.
As shown in Figure 1, inorganic material layer is made of nano ceramics in the utility model, and the thickness of inorganic material layer is excellent
It is selected as 6~10um；Nano ceramic material has excellent high temperature resistance, can effectively prevent the thermal contraction of polyalkene diaphragm, keep away
Exempt from battery plus-negative plate contact and cause battery short circuit, so that cell damage or explosion, improve the high temperature protection function of battery；It is thick simultaneously
The selection of degree can significantly improve the thermal stability and mechanical performance of diaphragm, be unfavorable for changing if the thickness of inorganic material layer is too thin
The thermal stability of kind diaphragm can reduce the energy density of battery when inorganic material layer is too thick.
With reference to figure 1, the utility model interval film layer is made of polyethylene or polypropylene material, and the thickness of membrane layer is excellent
It is selected as 12~20um, the selection of the membrane thicknesses is the safety for considering diaphragm, permeability, thermal contraction and mechanical strength etc.
What performance determined；The thickness of the bonding film layer is preferably 5~8um, by the goo that 5~8um thickness is arranged on membrane layer
The adhesive effect of diaphragm and battery pole piece can be improved in matter, and the local perforations being avoided that on diaphragm lead to the micro-short circuit of battery；It is described
Bonding way is carried out using painting to be fixedly connected, be bonded by being added between both inorganic material layer, membrane layer and bonding film layer are adjacent
Agent or additive etc. make slurry and apply shoe bonding, and the production method is more simple and efficient compared to other methods, while manufactured diaphragm
It is safe, heat-shrinkable is good, contribute to increase battery bulk life time.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, various modifications and changes may be made to the present invention；It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (5)
1. a kind of lithium manganate battery diaphragm, it is characterised in that including membrane layer, inorganic material layer and bonding film layer, the membrane layer
It it is two, inorganic material layer is set between two membrane layers, and the lateral surface of each membrane layer is all provided with that there are one be bonded film layer.
2. a kind of lithium manganate battery diaphragm according to claim 1, it is characterised in that the membrane layer using polyethylene or
Polypropylene material is made, and the thickness of membrane layer is 12~20um.
3. a kind of lithium manganate battery diaphragm according to claim 1, it is characterised in that the inorganic material layer uses nanometer
Ceramics are made, and the thickness of inorganic material layer is 6~10um.
4. a kind of lithium manganate battery diaphragm according to claim 1, it is characterised in that it is described bonding film layer thickness be 5~
8um。
5. a kind of lithium manganate battery diaphragm according to any one of claims 1 to 4, it is characterised in that the inorganic material
Bonding way is carried out between both layer, membrane layer and bonding film layer are adjacent using painting to be fixedly connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721861398.3U CN207611805U (en) | 2017-12-27 | 2017-12-27 | A kind of lithium manganate battery diaphragm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721861398.3U CN207611805U (en) | 2017-12-27 | 2017-12-27 | A kind of lithium manganate battery diaphragm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207611805U true CN207611805U (en) | 2018-07-13 |
Family
ID=62798216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721861398.3U Expired - Fee Related CN207611805U (en) | 2017-12-27 | 2017-12-27 | A kind of lithium manganate battery diaphragm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207611805U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117977115A (en) * | 2024-03-28 | 2024-05-03 | 西北工业大学 | Battery diaphragm capable of inhibiting growth of sodium dendrite and preparation method and application thereof |
-
2017
- 2017-12-27 CN CN201721861398.3U patent/CN207611805U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117977115A (en) * | 2024-03-28 | 2024-05-03 | 西北工业大学 | Battery diaphragm capable of inhibiting growth of sodium dendrite and preparation method and application thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180713 Termination date: 20211227 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |