CN208738357U - A kind of lithium ion battery micropore collector - Google Patents
A kind of lithium ion battery micropore collector Download PDFInfo
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- CN208738357U CN208738357U CN201820986773.5U CN201820986773U CN208738357U CN 208738357 U CN208738357 U CN 208738357U CN 201820986773 U CN201820986773 U CN 201820986773U CN 208738357 U CN208738357 U CN 208738357U
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- micropore
- collector
- foil
- ion battery
- lithium ion
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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
Abstract
The utility model discloses a kind of lithium ion battery micropore collectors, the collector is made of the foil ontology for offering multiple micropores, it is characterized in that, micropore on the foil ontology is arranged in Z-shaped, and the micropore size is 0.2~0.4mm, pitch of holes 3-4mm, porosity are 10%~20%.The utility model is applied in lithium ion battery using micropore collector, guarantee that anode and cathode slurry can be coated uniformly on micropore collector, and coating is non-leakage, pole piece flexibility is good, and the use of micropore collector can mitigate foil weight on the basis of the foil of equivalent specifications, promote battery core energy density, the design of micropore can effectively promote the wetting efficiency of lithium-ion battery electrolytes, while reduce the internal resistance of foil, promote high rate performance.
Description
Technical field
The utility model relates to technical field of lithium ion, specifically a kind of lithium ion battery micropore collector.
Background technique
In recent ten years, lithium ion battery with its superior chemical property the quilt on portable device and power battery
It is widely applied, but the energy density and power density of existing lithium ion battery are unable to satisfy people to electric car, mixing
The requirement of electric vehicle, the use by reducing auxiliary material industrial at present, Lai Tigao energy density, such as using thinner diaphragm,
Mitigate copper aluminum foil weights, improves dosage of main material etc., positive and negative anodes collector generally uses copper aluminium foil, traditional electrode pole at present
Piece production method be directly active material by the attachment of a certain amount of binder on a current collector, active material and collector
Combination belongs to simple mechanical bond, and effective contact area of active material is limited, to increase active material and collection
The contact internal resistance of fluid.
As people are while mitigating the weight of foil, start to study novel collector, such as in phosphoric acid
The carbon-coated aluminum foils applied in iron lithium, the technology that exactly battery conductive substrate is surface-treated using functional coating,
The surface of aluminium foil applies and is covered with one layer of conductive nano graphite, it can provide splendid static conductive performance, reduces positive electrode sum aggregate
Contact internal resistance between fluid.Micropore collector is also of interest by researcher, through chemically or physically method on common foil
It prepares micropore, under the foil of same specification, alleviates the weight of foil, promote the energy density of battery, while passing through shape between hole
At " work " type occlusion, promoted copper foil, aluminium foil surface cohesive force.
Utility model content
The purpose of this utility model is to provide a kind of lithium ion battery micropore collectors, to solve above-mentioned background technique
The problem of middle proposition.
To achieve the above object, the utility model provides the following technical solutions:
A kind of lithium ion battery micropore collector, the collector are made of the foil ontology for offering multiple micropores,
Micropore on the foil ontology is arranged in Z-shaped.
Further, the micropore size is 0.2~0.4mm, pitch of holes 3-4mm, porosity are 10%~20%.
Further, the foil ontology is copper foil ontology or aluminium foil ontology.
Further, the micropore on the foil ontology is made by the way of machining.
Further, the copper foil ontology with a thickness of 6-8um.
Further, the aluminium foil ontology with a thickness of 12-16um.
Compared with prior art, the utility model has the beneficial effects that
The utility model plus plate current-collecting body uses micropore aluminium foil, and negative current collector uses micropore copper foil, and the micropore is in Z-shaped
Arrangement, in the case where copper foil or certain aluminium foil internal resistance, keeps drilling cost minimum.
Micropore on the utility model foil ontology is made by way of machining, and the object of foil ontology is maintained
Reason and chemical property are constant, while can keep higher elongation and tensile strength.
The utility model is applied in lithium ion battery using micropore collector, guarantees that anode and cathode slurry can be coated uniformly
On micropore collector, and coating is non-leakage, and pole piece flexibility is good, and the use of micropore collector can be in the foil of equivalent specifications
On the basis of, mitigate foil weight, improve battery core energy density, the design of micropore can effectively promote lithium-ion battery electrolytes
Wetting efficiency, while the internal resistance of foil is reduced, the DC internal resistance of battery reduces by 23%, and multiplying power charging performance improves, in big multiplying power
Under 8C charging, capacity retention ratio improves 20%.
Detailed description of the invention
In order to illustrate more clearly of the technical solution of the utility model embodiment, embodiment or the prior art will be retouched below
Attached drawing needed in stating is briefly described, it should be apparent that, the accompanying drawings in the following description is only the utility model
Some embodiments for those of ordinary skill in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is the utility model lithium ion battery micropore current collector aluminum foil structural schematic diagram.
In figure, 1- aluminium foil ontology, 3- micropore
Fig. 2 is the utility model lithium ion battery micropore copper foil of affluxion body structural schematic diagram.
In figure, 2- copper foil ontology, 3- micropore
Fig. 3 is lithium ion battery direct-current internal resistance comparison diagram.
Fig. 4 is lithium ion battery multiplying power charging performance curve.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without creative efforts
Every other embodiment obtained, fall within the protection scope of the utility model.
Embodiment 1
As shown in Figure 1, a kind of lithium ion battery micropore collector, the collector is by offering the aluminium of multiple micropores 3
Foil ontology 1 is constituted, and the micropore 3 on the aluminium foil ontology 1 is arranged in Z-shaped.
Micropore 3 on the aluminium foil ontology 1 is made by the way of mechanical hole fabrication, before drilling, first with ultrasonic wave to aluminium
Foil ontology is cleaned, and the remaining chemical substance on surface is removed.
3 aperture of micropore is 0.2~0.4mm, pitch of holes 3-4mm, porosity are 10%~20%.
The aluminium foil ontology 1 with a thickness of 12-16um.
Embodiment 2
As shown in Fig. 2, a kind of lithium ion battery micropore collector, the collector is by offering the copper of multiple micropores 3
Foil ontology 2 is constituted, and the micropore 3 on the copper foil ontology 2 is arranged in Z-shaped.
Micropore 3 on the copper foil ontology 2 is made by the way of mechanical hole fabrication, before drilling, first with ultrasonic wave to copper
Foil ontology is cleaned, and the remaining chemical substance on surface is removed.
3 aperture of micropore is 0.2~0.4mm, pitch of holes 3-4mm, porosity are 10%~20%.
The copper foil ontology 2 with a thickness of 6-8um.
The preparation of lithium ion battery:
Lithium ion battery is equipped with anode, cathode, diaphragm and electrolyte, and the positive electrode is nickel cobalt manganese material, cathode
Material is artificial graphite, and the electrolyte is made of solvent, electrolyte and additive, and the solvent is that organic solvent can be carbon
Vinyl acetate, propene carbonate, butylene, diethyl carbonate, dimethyl carbonate, methyl ethyl carbonate, methyl propyl carbonate, second
At least one of acetoacetic ester etc., electrolyte are that lithium salts can be lithium hexafluoro phosphate, lithium perchlorate, lithium nitrate, LiBF4
At least one of Deng, additive can be selected from vinylene carbonate, vinylethylene carbonate, fluorinated ethylene carbonate etc. extremely
Few one kind.
(2) preparation of anode pole piece
By nickel cobalt manganese material, conductive agent (super p) and binder (PVDF) 9:0.3:0.2 in mass ratio, it is sufficiently mixed
It uniformly carries out oil system to size mixing, according to the viscosity of the porosity of micropore adjusting slurry within 6000-9000mPas, porosity exists
Within 10%-15%, suitable slurry viscosity is between 6000-7500mPas, and porosity is within 15%-20%, suitable slurry
Viscosity between 7500-9000mPas, by this slurry as cladding process be uniformly coated on embodiment 1 made from micropore aluminium foil,
After drying roll-in, it is die-cut to electrode slice.
(1) preparation of cathode pole piece
By graphite, conductive agent (super p), dispersing agent (CMC) and binder (SBR, 40%) 9:0.2 in mass ratio:
0.2:0.1 is sufficiently mixed uniformly progress water system and sizes mixing, adjusts the viscosity of slurry in 3000- according to the porosity of micropore
Within 6000mPas, porosity is within 10%-15%, and between 3000-4500mPas, porosity exists suitable slurry viscosity
Within 15%-20%, suitable slurry viscosity is uniformly coated on reality by cladding process between 4500-6000mPas, by this slurry
Apply on micropore copper foil made from example 2, after drying roll-in, be die-cut to electrode slice, be welded into after positive plate lamination shell, fluid injection,
Encapsulation is prepared into soft-package battery.
The DC internal resistance for the lithium ion battery being prepared is as shown in figure 3, test proof, identical positive and negative anodes, electrolyte
Chemical system under using micropore collector battery core than using common collector battery core DC internal resistance (DCR) reduce by 23%.
Porosity on foil has a certain impact to performance of lithium ion battery, within porosity 10%-20%, with
The high rate performance of the raising of foil porosity, lithium ion battery is obviously improved, foil porosity 10%, and 15%, 20% is corresponding
4C multiplying power charging capacity conservation rate is respectively 81%, 84%, 88%.
The high rate performance curve of charge and discharge under different multiplying for the lithium ion battery being prepared is as shown in figure 4, charge and discharge
Piezoelectric voltage range is 2.8-4.2V, uses charging of the battery of micropore copper aluminium foil in the case where multiplying power is 1C, 2C, 3C, 4C, 5C, 6C, 8C
Capacity retention ratio is respectively 89.7%, 84.2%, 80.8%, 78.0%, 75.2%, 71.9%, 63.5%, using micropore copper aluminium
The battery multiplying power charging performance of foil is substantially better than ordinary copper aluminium foil, especially under big multiplying power, under the charging of 8C multiplying power, and micropore copper aluminium
The battery charge capacity conservation rate of foil is higher by 20% than using the battery capacity conservation rate of ordinary copper aluminium foil, preferable high rate performance table
The collector internal resistance of bright micropore copper aluminium foil during high current charge-discharge is small, and the electric conductivity of battery improves.
Above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations；Although referring to aforementioned reality
Example is applied the utility model is described in detail, those skilled in the art should understand that: it still can be to preceding
Technical solution documented by each embodiment is stated to modify or equivalent replacement of some of the technical features；And these
It modifies or replaces, the spirit and model of various embodiments of the utility model technical solution that it does not separate the essence of the corresponding technical solution
It encloses.
Claims (6)
1. a kind of lithium ion battery micropore collector, the collector is made of the foil ontology for offering multiple micropores,
It is characterized in that, the micropore on the foil ontology is arranged in Z-shaped.
2. lithium ion battery according to claim 1 micropore collector, which is characterized in that the micropore size is 0.2
~0.4mm, pitch of holes 3-4mm, porosity are 10%~20%.
3. lithium ion battery according to claim 1 micropore collector, which is characterized in that the foil ontology is copper foil
Ontology or aluminium foil ontology.
4. lithium ion battery according to claim 1 micropore collector, which is characterized in that micro- on the foil ontology
Hole is made by the way of machining.
5. lithium ion battery according to claim 3 micropore collector, which is characterized in that the thickness of the copper foil ontology
For 6-8um.
6. lithium ion battery according to claim 3 micropore collector, which is characterized in that the thickness of the aluminium foil ontology
For 12-16um.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201820986773.5U CN208738357U (en) | 2018-06-26 | 2018-06-26 | A kind of lithium ion battery micropore collector |
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| CN201820986773.5U CN208738357U (en) | 2018-06-26 | 2018-06-26 | A kind of lithium ion battery micropore collector |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110661036A (en) * | 2019-09-03 | 2020-01-07 | 河南豫清新能源产业有限公司 | Manufacturing method of high-specific energy power lithium ion battery |
| CN115799443A (en) * | 2023-02-06 | 2023-03-14 | 中自环保科技股份有限公司 | Sodium ion battery microporous aluminum foil electrode and preparation method thereof |
| CN114551787B (en) * | 2022-02-18 | 2024-04-26 | 星恒电源股份有限公司 | Lithium battery positive plate and preparation method thereof |
-
2018
- 2018-06-26 CN CN201820986773.5U patent/CN208738357U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110661036A (en) * | 2019-09-03 | 2020-01-07 | 河南豫清新能源产业有限公司 | Manufacturing method of high-specific energy power lithium ion battery |
| CN114551787B (en) * | 2022-02-18 | 2024-04-26 | 星恒电源股份有限公司 | Lithium battery positive plate and preparation method thereof |
| CN115799443A (en) * | 2023-02-06 | 2023-03-14 | 中自环保科技股份有限公司 | Sodium ion battery microporous aluminum foil electrode and preparation method thereof |
| CN115799443B (en) * | 2023-02-06 | 2023-05-12 | 中自环保科技股份有限公司 | Microporous aluminum foil electrode of sodium ion battery and preparation method thereof |
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Effective date of registration: 20230426 Granted publication date: 20190412 |