CN110071294A - Lithium ion battery structure - Google Patents
Lithium ion battery structure Download PDFInfo
- Publication number
- CN110071294A CN110071294A CN201910373345.4A CN201910373345A CN110071294A CN 110071294 A CN110071294 A CN 110071294A CN 201910373345 A CN201910373345 A CN 201910373345A CN 110071294 A CN110071294 A CN 110071294A
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- China
- Prior art keywords
- electrode active
- collector
- complex
- porous
- lithium ion
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- 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.)
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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
- H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/661—Metal or alloys, e.g. alloy coatings
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/70—Carriers or collectors characterised by shape or form
- H01M4/80—Porous plates, e.g. sintered carriers
- H01M4/808—Foamed, spongy 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
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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
-
- 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)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Secondary Cells (AREA)
Abstract
A kind of lithium ion battery structure, porous aluminium foil and porous copper foil as positive and negative collector are covered each by porous septum both side surface, form collector-diaphragm complex, and the whole duct of collector-diaphragm complex has connectivity；One end of anode ear and negative electrode lug is connected with the collector-diaphragm complex aluminium foil and copper foil respectively；The collector-diaphragm complex separates two sides positive electrode active materials coating and negative electrode active material coating, adjacent intimate surface contact forms the period stepped construction of positive electrode active materials coating-complex-negative electrode active material coating-complex-positive electrode active materials coating.The present invention can promote the performance and manufacturing quality of Current commercial lithium ion battery.
Description
Technical field
The invention belongs to power technique fields, and in particular to arrive a kind of lithium ion battery structure.
Background technique
The advantages that lithium ion battery is with its high-energy density, high power performance, without memory and low self-discharge rate is extensive
Applied to consumer electronics field and new energy field.The energy density of lithium ion battery, power-performance depend not only on internal
Electrode, electrolyte material are also related to the close structure of electro-chemical systems.In terms of cell safety, battery structure also has certainly
Qualitative effect, as 7 explosive incident of Samsung mobile phone Note just because of when battery structure designs, excess compression volume is caused in
Short circuit, to cause thermal runaway and be formed.
Currently, there are mainly three types of the overall configurations of industrial lithium ion battery comparative maturity: cylinder takeup type, rectangular winding
Formula and stacked.Pole piece is presented in a thickness direction and is periodically laminated for the battery core of these three structures, when battery work, electrification
Reaction is learned independently to carry out between each duplicate electrode pair respectively.Electricity is improved to shorten Ion transfer distance for single electrode
Pond multiplying power property, coating layer thickness have the development trend of reduction.This aspect can reduce the energy density of monomer；On the other hand, exist
The more difficult control of the consistency of coating process coating thickness, causes thickness of electrode uneven, influences battery product quality.To reduce
Inert matter accounting, the collector of commercial Li-ion batteries are equally constantly being thinned, especially the biggish copper foil of density.And collect
The excessively thin risk that will increase battery core manufacturing process band of discontinuance of fluid, therefore, this technology path for improving energy density is again backward
It will receive very big restriction.
New lithium ion battery structure and corresponding manufacturing process are the hot spots of world community concern and research.For example moral
Motor corporation, state is researching and developing the bipolar lithium ion battery of big plane energetically, it is contemplated that the volume energy of battery can be substantially improved in the structure
Metric density increases the course continuation mileage of automobile.
Summary of the invention
The present invention is directed to propose a kind of novel lithium ion battery structure, to promote the property of Current commercial lithium ion battery
Energy and manufacturing quality.
The invention proposes a kind of lithium ion battery structure, porous aluminium foil and porous copper foil point as positive and negative collector
It is not covered in porous septum both side surface, forms collector-diaphragm complex, the whole hole stage property of collector-diaphragm complex
There is connectivity；One end of anode ear and negative electrode lug is connected with the collector-diaphragm complex aluminium foil and copper foil respectively；Institute
It states collector-diaphragm complex to separate two sides positive electrode active materials coating and negative electrode active material coating, adjacent surface is tight
Contiguity touching forms positive electrode active materials coating-complex-negative electrode active material coating-complex-positive electrode active materials and applies
The period stepped construction of layer.
The thickness of the porous aluminium foil and porous copper foil selects between 5 μm ~ 10 μm, the average pore size of hole 1 μm ~
It is selected between 100 μm, porosity selects between 50% ~ 80%.
The thickness of the porous septum selects between 10 μm ~ 30 μm.
The positive electrode active materials coating and negative electrode active material coating layer thickness selects between 50 μm ~ 200 μm.
The present invention can make lithium ion battery receive it is following the utility model has the advantages that
1. collector weight saving reduces lithium ion battery inert matter quality accounting, mass energy density is improved.Afflux
Body, diaphragm general thickness also reduce, and reduce inert matter volume accounting, and volume energy density improves.
2. the porous surface of afflux bulk metal layer can more closely be contacted with active material coating, coating and collector are bonded
Intensity improves, and active material is unlikely to be peel off in battery manufacture or use process.
3. positive and negative and active material coating can be general commercial Li-ion electricity in the case where guaranteeing the identical situation of high rate performance
Twice of pond pole piece one-sided coatings thickness, thus coating layer thickness fluctuation is relatively small in coating, consistency is more preferable, can make battery
Possess longer cycle life.
4. the pore network being integrally connected to can make each layer electrode be interconnected to by the electrolyte filled in hole, work as electricity
The inhomogeneities of each layer ion concentration is eased when the work of pond, and lithium ion battery is made to have better charge and discharge performance.
5. each layer porosity communication makes electrolyte wetting efficiency be increased dramatically in fluid injection, manufacture efficiency is improved, from
And production cost reduces.
6. the present invention also largely remains existing structure and manufacturing process while improving structure, therefore realizes
Come relatively easy.
Detailed description of the invention
Fig. 1 is battery core schematic diagram of laminated structure；
Fig. 2 is the Porous Cu film surface image prepared；
Fig. 3 is tab and a kind of connected mode schematic diagram of collector in the present invention；
Fig. 4 is tab and collector another kind connected mode schematic diagram in the present invention；
Fig. 5 is positive and negative plate structural schematic diagram in the present invention.
Specific embodiment
It should be appreciated that specific embodiment described herein is only to illustrate, it is not intended to limit the present invention.Below will
The present invention is described in further detail in conjunction with attached drawing.
Referring to Fig. 1, the invention proposes a kind of lithium ion battery structure, including the porous aluminum as positive and negative collector
Foil 2 and porous copper foil 4, which are covered each by, forms collector-diaphragm complex 10, collector-diaphragm in 3 both side surface of porous septum
The whole duct of complex has connectivity.Anode ear, negative electrode lug one end respectively with the collector-diaphragm complex two sides
Aluminium foil 2 be connected with copper foil 4.The collector-diaphragm complex applies the positive electrode active materials for being located at the left and right sides
Layer 1 and negative electrode active material coating 5 separate, neighboring layers intimate surface contact, form " positive electrode active materials coating 1- complex
The period stepped construction of 10- negative electrode active material coating 5- complex 10- positive electrode active materials coating 1 ".
Please refer to figs. 2 and 3, and the cellular aluminium foil 2 and 4 surface of cellular copper foil are divided into non-porous 7 He of fringe region
Porous dispensing area 8, the porous zone 8 is as shown in Figure 2.For the stacked and wound lithium ion battery of square ring, bear
Tab 6 is that the edge that the negative current collector 4 reserves is cut into (see figure 3).For cylinder takeup type, the negative electrode lug 6
To be fixed on the nickel metal bar (see figure 4) on the negative current collector 4 with adhesive tape.Fig. 3 and Fig. 4 only depicts the case where cathode,
Positive situation is same.
The thickness of the porous aluminium foil 2 and porous copper foil 4 between 5 μm ~ 10 μm, border width after cutting 1 μm ~
Between 2 μm.The pore size distribution of the porous zone 8 is in 1 μm ~ 100 μ ms, and porosity is between 50% ~ 80%.
Referring to Fig. 5, the porous aluminium foil 2 and porous copper foil 4 and the 3 surface gluing of porous septum, pay attention to break
The connectivity in duct between bad three regions, to obtain collector-diaphragm complex.Then, the collector-diaphragm is multiple
Zoarium is used as substrate, and the electrode slurry made is coated on by current electrodes of lithium-ion batteries painting process, different
, the one side of substrate is only coated here.The face positive plate coated with anode sizing agent is negative on one side with what negative electrode slurry coated
Pole piece.After drying, roll-in, cutting, by positive and negative two kinds of pole pieces alternately winding or lamination and obtain battery core, remaining step with work as
Preceding commercial Li-ion batteries manufacturing process is identical, and which is not described herein again, but technological parameter should be done accordingly according to specific actual conditions
Adjustment.
The porous septum 3 uses conventional PP(polypropylene), PE(polyethylene) porous septum, thickness is selected in 10
μm ~ 30 μm between.
The thickness of the positive electrode active materials coating 1 and negative electrode active material coating 5 is each about general commercial Li-ion electricity
Twice of pond pole piece single side coating layer thickness, range are selected at 50 μm ~ 200 μm.
The embodiment that the lithium ion battery with structure of the invention is more specifically illustrated in the present embodiment, but and do not have to
In limitation implementation of the invention.All application lithium ion battery structures proposed by the present invention, are all contained in patent of the invention
Within protection scope.
Claims (4)
1. a kind of lithium ion battery structure, it is characterised in that: porous aluminium foil and porous copper foil as positive and negative collector cover respectively
It is placed on porous septum both side surface, forms collector-diaphragm complex, the whole duct of collector-diaphragm complex, which has, to be connected
The general character；One end of anode ear and negative electrode lug is connected with the collector-diaphragm complex aluminium foil and copper foil respectively；The collection
Fluid-diaphragm complex separates two sides positive electrode active materials coating and negative electrode active material coating, and adjacent surface closely connects
Touching forms positive electrode active materials coating-complex-negative electrode active material coating-complex-positive electrode active materials and applies
The period stepped construction of layer.
2. lithium ion battery structure according to claim 1, it is characterised in that: the thickness of the porous aluminium foil and porous copper foil
Degree selects between 5 μm ~ 10 μm, and the average pore size of hole selects between 1 μm ~ 100 μm, and porosity is selected between 50% ~ 80%
It selects.
3. lithium ion battery structure according to claim 1 or 2, it is characterised in that: the thickness of the porous septum is in 10 μ
It is selected between m ~ 30 μm.
4. lithium ion battery structure according to claim 1 or 2, it is characterised in that: the positive electrode active materials coating and
Negative electrode active material coating layer thickness selects between 50 μm ~ 200 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910373345.4A CN110071294A (en) | 2019-05-07 | 2019-05-07 | Lithium ion battery structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910373345.4A CN110071294A (en) | 2019-05-07 | 2019-05-07 | Lithium ion battery structure |
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| Publication Number | Publication Date |
|---|---|
| CN110071294A true CN110071294A (en) | 2019-07-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910373345.4A Pending CN110071294A (en) | 2019-05-07 | 2019-05-07 | Lithium ion battery structure |
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| Country | Link |
|---|---|
| CN (1) | CN110071294A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113314698A (en) * | 2020-02-27 | 2021-08-27 | 通用汽车环球科技运作有限责任公司 | Composite reference electrode substrate and associated methods |
| CN113451586A (en) * | 2021-05-27 | 2021-09-28 | 天津国安盟固利新材料科技股份有限公司 | Electrode plate of secondary battery, secondary battery and preparation method of secondary battery |
| CN115051112A (en) * | 2022-07-12 | 2022-09-13 | 远景动力技术(江苏)有限公司 | Composite diaphragm and application thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106469825A (en) * | 2015-08-21 | 2017-03-01 | 北京好风光储能技术有限公司 | A kind of high-power high-capacity lithium ion battery and preparation method thereof |
-
2019
- 2019-05-07 CN CN201910373345.4A patent/CN110071294A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106469825A (en) * | 2015-08-21 | 2017-03-01 | 北京好风光储能技术有限公司 | A kind of high-power high-capacity lithium ion battery and preparation method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113314698A (en) * | 2020-02-27 | 2021-08-27 | 通用汽车环球科技运作有限责任公司 | Composite reference electrode substrate and associated methods |
| CN113451586A (en) * | 2021-05-27 | 2021-09-28 | 天津国安盟固利新材料科技股份有限公司 | Electrode plate of secondary battery, secondary battery and preparation method of secondary battery |
| CN115051112A (en) * | 2022-07-12 | 2022-09-13 | 远景动力技术(江苏)有限公司 | Composite diaphragm and application thereof |
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Application publication date: 20190730 |
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