CN208189691U - A kind of lithium ion battery separator - Google Patents
A kind of lithium ion battery separator Download PDFInfo
- Publication number
- CN208189691U CN208189691U CN201820211996.4U CN201820211996U CN208189691U CN 208189691 U CN208189691 U CN 208189691U CN 201820211996 U CN201820211996 U CN 201820211996U CN 208189691 U CN208189691 U CN 208189691U
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- Prior art keywords
- lithium ion
- ion battery
- battery separator
- substrate
- utility
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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 ion battery separator, substrate, and the side or two sides of the substrate are coated with adhesive layer, and the adhesive layer is made of several spaced apart cohesive bodies；Micropore is provided on the substrate.The adhesive layer of the utility model is made of several spaced apart cohesive bodies, the structure it is possible to prevente effectively from pole piece and during diaphragm hot-pressing cementitious material by the completely plugged formation dead zone of diaphragm micro-hole.
Description
Technical field
The utility model relates to lithium ion battery separator fields, more particularly, to a kind of lithium ion battery separator.
Background technique
Lithium ion battery have the characteristics that energy density is high, operating voltage is high, memory-less effect and have extended cycle life and by
It is widely used as the power supply of various mobile devices.Lithium ion battery generally includes anode, cathode, diaphragm and electrolyte, diaphragm conduct
Barrier between positive and negative anodes plays the role of performance that is vital, therefore passing through improvement diaphragm to the performance of lithium ion battery
It is received more and more attention to improve the research of the safety of lithium ion battery, usability, craftsmanship.
Country requires to be continuously improved to lithium ion battery energy density, to improve battery energy density, selects ternary nickelic
Positive electrode is inexorable trend, must match corresponding high-energy negative electrode material using high energy positive electrode, electric in this system
Core easily deforms in charge and discharge process, at the same cathode pole piece rebound it is larger and with cycle-index it is continuous accumulation have by
Increase tendency is walked, to solve this problem, industry technical field proposes sticky diaphragm concept, and positive/negative plate is passed through certain condition
It bonds together, purpose is exactly not influence battery performance to effectively control battery core deformation and inhibit cathode pole piece rebound
Under the premise of play bonding positive/negative plate function.
Utility model content
Aiming at the problems existing in the prior art, the primary and foremost purpose of the utility model be to provide a kind of lithium ion battery every
Film has good caking property and ion permeability, effectively improves the security performance and service performance of lithium ion battery；This is practical
Novel secondary objective is to provide a kind of preparation method of lithium ion battery separator.
In order to solve the above technical problems, a kind of lithium ion battery separator provided by the utility model, comprising: substrate, it is described
The side or two sides of substrate are coated with adhesive layer, and the adhesive layer is made of several spaced apart cohesive bodies；
Micropore is provided on the substrate.
Further, the cohesive body is to wait gaps arrangement or stochastic backlash arrangement.
Further, the cohesive body is made of single caking property particle.
Further, the cohesive body is made of multiple caking property particles.
Further, the cohesive body is irregular aggregation shape.
Cohesive body described further is crateriform, and the crateriform is intermediate low, the high structure of surrounding.
The above-mentioned technical proposal of the utility model has the advantages that the adhesive layer of the utility model by several intervals
The cohesive body of arrangement forms, and the structure is it is possible to prevente effectively from cementitious material is by diaphragm micro-hole during pole piece and diaphragm hot-pressing
Completely plugged formation dead zone.
Detailed description of the invention
It below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art
Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below
In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art
Under the premise of labour, it is also possible to obtain other drawings based on these drawings.
FIG. 1 is a schematic structural view of the utility model；
Fig. 2 is the first example structure schematic diagram of the utility model；
Fig. 3 is second of example structure schematic diagram of the utility model；
Fig. 4 is the third example structure schematic diagram of the utility model；
Fig. 5 is that cohesive body is crateriform apparent form electron scanning imaging figure (SEM figure) in the third embodiment.
Specific embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described
Embodiment is the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, originally
Field those of ordinary skill every other embodiment obtained without making creative work belongs to practical
Novel protected range.
It is in the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only
For ease of description the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have it is specific
Orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.In addition, term " the
One ", " second ", " third " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
The concrete meaning of language in the present invention.
As shown in Figure 1, a kind of lithium ion battery separator described in the present embodiment, comprising: substrate 1, the side of substrate 1 or
Two sides are coated with adhesive layer 2, and adhesive layer 2 is made of several spaced apart cohesive bodies 21；
Micropore 11 is provided on substrate 1.
Substrate 1 both can be the microporous barrier of single layer, or band coating microporous barrier is polyolefin, fragrant adoption
The microporous barrier and its coating modified product of amide or non-woven fabrics material.
Gaps arrangement or the stochastic backlash arrangements such as cohesive body 21 is.
As shown in Fig. 2, cohesive body 21 is made of single caking property particle 211.
As shown in Figure 3-4, cohesive body 21 is made of multiple caking property particles 211.
As shown in figure 3, cohesive body 21 is irregular aggregation shape.
As shown in figure 4, cohesive body 21 is crateriform, crateriform is that centre is low, and the high structure of surrounding is distributed in the fire
The quantity of the caking property particle 211 of the mountain pass sunken part of shape structure centre is less than 21 surrounding convex portion of crateriform cohesive body；
The grain diameter of caking property particle 211 is in 0.1-20 μ m, and particle of the partial size greater than 5 μm accounts for total particle quantity
60% or more.
Caking property particle 211 are as follows: Kynoar, vinylidene fluoride-hexafluoropropylene copolymer, polyacrylonitrile, poly- methyl-prop
One of e pioic acid methyl ester powder；Partial size is in 0.1-20 μ m.
In figure: 3 be above-mentioned gap.
The used caking property polymer material of the utility model has good imbibition, liquid-keeping property, and battery core can be improved
Cycle performance.
Finally, it should be noted that the above various embodiments is only to illustrate the technical solution of the utility model, rather than it is limited
System；Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should
Understand: it is still possible to modify the technical solutions described in the foregoing embodiments, or to some or all of
Technical characteristic is equivalently replaced；And these are modified or replaceed, it does not separate the essence of the corresponding technical solution, and this is practical new
The range of each embodiment technical solution of type.
Claims (5)
1. a kind of lithium ion battery separator characterized by comprising substrate, the side or two sides of the substrate are coated with viscous
Layer is tied, the adhesive layer is made of the cohesive body that several gaps are arranged；
Micropore is provided on the substrate.
2. a kind of lithium ion battery separator according to claim 1, it is characterised in that: the cohesive body is to wait gaps arrangement
Or stochastic backlash arrangement.
3. a kind of lithium ion battery separator according to claim 1, it is characterised in that: the cohesive body is by single caking property
Particle composition.
4. a kind of lithium ion battery separator according to claim 1, it is characterised in that: the cohesive body is by multiple caking property
Particle composition.
5. a kind of lithium ion battery separator according to claim 4, it is characterised in that: the cohesive body is crateriform,
The crateriform is intermediate low, the high structure of surrounding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820211996.4U CN208189691U (en) | 2018-02-07 | 2018-02-07 | A kind of lithium ion battery separator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820211996.4U CN208189691U (en) | 2018-02-07 | 2018-02-07 | A kind of lithium ion battery separator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208189691U true CN208189691U (en) | 2018-12-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820211996.4U Active CN208189691U (en) | 2018-02-07 | 2018-02-07 | A kind of lithium ion battery separator |
Country Status (1)
| Country | Link |
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| CN (1) | CN208189691U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110635091A (en) * | 2019-08-19 | 2019-12-31 | 安徽理工大学 | Lithium battery composite diaphragm and preparation method thereof |
-
2018
- 2018-02-07 CN CN201820211996.4U patent/CN208189691U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110635091A (en) * | 2019-08-19 | 2019-12-31 | 安徽理工大学 | Lithium battery composite diaphragm and preparation method thereof |
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