CN110380107A - Ultra-thin lithium cell - Google Patents
Ultra-thin lithium cell Download PDFInfo
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- CN110380107A CN110380107A CN201910774980.3A CN201910774980A CN110380107A CN 110380107 A CN110380107 A CN 110380107A CN 201910774980 A CN201910774980 A CN 201910774980A CN 110380107 A CN110380107 A CN 110380107A
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 52
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 52
- 239000010410 layer Substances 0.000 claims abstract description 105
- 229910052751 metal Inorganic materials 0.000 claims abstract description 32
- 239000002184 metal Substances 0.000 claims abstract description 32
- 238000004806 packaging method and process Methods 0.000 claims abstract description 26
- 239000011248 coating agent Substances 0.000 claims abstract description 19
- 238000000576 coating method Methods 0.000 claims abstract description 19
- 230000007797 corrosion Effects 0.000 claims abstract description 19
- 238000005260 corrosion Methods 0.000 claims abstract description 19
- 239000012785 packaging film Substances 0.000 claims abstract description 19
- 229920006280 packaging film Polymers 0.000 claims abstract description 19
- 239000011241 protective layer Substances 0.000 claims abstract description 10
- 238000012856 packing Methods 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 31
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 13
- 239000011889 copper foil Substances 0.000 claims description 12
- 238000002844 melting Methods 0.000 claims description 11
- 239000005030 aluminium foil Substances 0.000 claims description 10
- 238000005520 cutting process Methods 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 5
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 4
- 239000010931 gold Substances 0.000 claims description 4
- 229910052737 gold Inorganic materials 0.000 claims description 4
- 239000004677 Nylon Substances 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 239000011888 foil Substances 0.000 claims 2
- 239000004411 aluminium Substances 0.000 claims 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims 1
- 229910052802 copper Inorganic materials 0.000 claims 1
- 239000010949 copper Substances 0.000 claims 1
- 239000003292 glue Substances 0.000 claims 1
- 210000004027 cell Anatomy 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 3
- 238000003466 welding Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 210000003684 theca cell Anatomy 0.000 abstract description 2
- 239000011259 mixed solution Substances 0.000 description 4
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- NROKBHXJSPEDAR-UHFFFAOYSA-M potassium fluoride Chemical compound [F-].[K+] NROKBHXJSPEDAR-UHFFFAOYSA-M 0.000 description 2
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- JHWIEAWILPSRMU-UHFFFAOYSA-N 2-methyl-3-pyrimidin-4-ylpropanoic acid Chemical compound OC(=O)C(C)CC1=CC=NC=N1 JHWIEAWILPSRMU-UHFFFAOYSA-N 0.000 description 1
- DDFHBQSCUXNBSA-UHFFFAOYSA-N 5-(5-carboxythiophen-2-yl)thiophene-2-carboxylic acid Chemical compound S1C(C(=O)O)=CC=C1C1=CC=C(C(O)=O)S1 DDFHBQSCUXNBSA-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 150000008064 anhydrides Chemical class 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 229910000423 chromium oxide Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009459 flexible packaging Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- KMUONIBRACKNSN-UHFFFAOYSA-N potassium dichromate Chemical compound [K+].[K+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O KMUONIBRACKNSN-UHFFFAOYSA-N 0.000 description 1
- 235000003270 potassium fluoride Nutrition 0.000 description 1
- 239000011698 potassium fluoride Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 235000013024 sodium fluoride Nutrition 0.000 description 1
- 239000011775 sodium fluoride Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
-
- 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
- H01M4/665—Composites
- H01M4/667—Composites in the form of layers, e.g. coatings
-
- 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
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
-
- 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
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/102—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure
- H01M50/105—Pouches or flexible bags
-
- 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
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/116—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material
-
- 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
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/116—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material
- H01M50/124—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material having a layered structure
-
- 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
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/116—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material
- H01M50/124—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material having a layered structure
- H01M50/1243—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material having a layered structure characterised by the internal coating on the casing
-
- 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
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/183—Sealing members
- H01M50/186—Sealing members characterised by the disposition of the sealing members
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
-
- 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
Abstract
A kind of ultra-thin lithium cell; including battery and packaging diaphragm; the packaging diaphragm includes the anode packaging diaphragm with anode ear and the cathode packaging diaphragm with negative electrode lug; lithium battery packaging film is combined by outer protective layer and interior metal layer; it is at least equipped in the inner surface of metal layer through chemically treated corrosion-resistant coating, the metal layer for packing diaphragm, which had not only been used as lithium battery collector but also had drawn, forms tab.Present invention employs completely new packaging film structures, first is that without theca interna；Second is that using using the inner surface of metal as the collector of lithium battery and drawing directly as tab, the welding procedure between traditional tab and collector is eliminated, the thickness of lithium battery is greatly reduced.The manufacture craft of thickness ultrathin is realized, inexpensive, battery energy density is big.Battery has certain flexibility, can be bent, and is more convenient later for drawing the application field and range that can greatly expand lithium battery in the structure design of electronic product.
Description
Technical field
The present invention relates to a kind of lithium battery technology, especially a kind of ultra-thin lithium cell.
Background technique
Traditional lithium battery is by collector and battery pole in outside flexible package aluminum-plastic composite membrane, lithium cell core, battery core
Ear is composed by heat-sealing, and flexible package aluminum-plastic composite membrane is both needed to cold stamping shaped depth 1mm or more and these batteries hold
Measure larger, whens charge and discharge and use, which can generate heat, generates high temperature etc., and this cold punching depth performance and high temperature resistance determine existing lithium
The structure design of battery flexible packaging film is unable to satisfy the needs of ultra-thin lithium cell.Collector and battery pole ear welding, pass in battery core
Tab metal tape of uniting is all relatively thick, and is designed with upper layer and lower layer gel, and gel is plastic-aluminum combined with two layers of flexible package again
Film is sealed, this will seriously affect the overall thickness and energy density of battery.
Summary of the invention
The technical problems to be solved in view of the defects of the present invention is to propose a kind of energy densities it is big, low at
This ultra-thin lithium cell.
The technical problem to be solved by the present invention is to what is be achieved through the following technical solutions, a kind of ultra-thin lithium cell is special
Point is: including battery and diaphragm is packed,
The packaging diaphragm is that the packaging diaphragm of anode made of being die cut as lithium battery packaging film and/or cathode pack diaphragm,
The lithium battery packaging film is combined by outer protective layer and interior metal layer, is at least set in the inner surface of metal layer
Have through chemically treated corrosion-resistant coating,
The polar material layer of the battery is attached to the inner surface of the corrosion-resistant coating of packaging diaphragm metal layer, packs the gold of diaphragm
Belong to collector of the layer as lithium battery；
The metal layer strip as battery pole ear directly reserved when the avris portion for packing diaphragm is equipped with cross cutting,
It is equipped with hot-melting sealed cushion rubber between two packaging diaphragms of battery surrounding, it is viscous for the heat-sealing between two packaging diaphragms
It closes, forms lithium battery.
The technical problem to be solved in the present invention can also further realize by the following technical programs, the battery packet
One or more groups of chips are included, every group of chip includes positive polarity material layer, medial septum layer and negative polarity material layer；The battery
When core is multiple groups chip, the same polarity material layer between adjacent chips is oppositely arranged, and is equipped between two same polarity material layers
Current collector material layer with tab.
The technical problem to be solved in the present invention can also further realize by the following technical programs, the collector material
Copper foil layer is used when the bed of material is cathode, with a thickness of 5 ~ 20 μm.
The technical problem to be solved in the present invention can also further realize by the following technical programs, in the copper foil layer
Two surfaces are equipped with through chemically treated corrosion-resistant coating.
The technical problem to be solved in the present invention can also further realize by the following technical programs, the collector material
Aluminium foil layer is used when the bed of material is anode, with a thickness of 7 ~ 20 μm.
The technical problem to be solved in the present invention can also further realize by the following technical programs, in the aluminium foil layer
Two surfaces are equipped with through chemically treated corrosion-resistant coating.
The technical problem to be solved in the present invention can also further realize by the following technical programs, lithium battery packaging film
Outer protective layer and interior metal layer between be equipped with adhesive phase.
The technical problem to be solved in the present invention can also further realize by the following technical programs, the lithium battery pack
The outer protective layer for filling film is pet layer or nylon layer, with a thickness of 8 ~ 20 μm.
The technical problem to be solved in the present invention can also further realize by the following technical programs, the cathode packaging
Copper foil layer that the metal layer of diaphragm is 10 ~ 30 μm of thickness or using with a thickness of 6 ~ 20 μm of stainless steel layer；The anode packaging film
The aluminium foil layer that the metal layer of piece is 16 ~ 30 μm of thickness.
The technical problem to be solved in the present invention can also further realize by the following technical programs, the hot-melting sealed
Cushion rubber is modified PE cushion rubber or MODIFIED PP cushion rubber.
The technical problem to be solved in the present invention can also further realize by the following technical programs, the corrosion-resistant coating
With a thickness of 0.01 ~ 0.1 μm.
Present invention employs completely new packaging film structures, first is that reducing cell thickness without theca interna；Second is that by metal
Inner surface used as the collector of lithium battery, eliminate two layers of collector altogether, and greatly reduce the thickness of battery；Third is that
Metal layer cross cutting is drawn and is used directly as tab, had not only saved the cost of traditional tab, but also do not account for the thickness of battery,
Also eliminate the welding procedure between traditional tab and collector.Compared with prior art, the present invention realizes thickness ultrathin
Manufacture craft, low cost, battery energy density are big.Due to ultra-thin design structure, battery has certain flexibility, can be curved
Bent camber or S-shaped etc. are more convenient later in the structure design of electronic product, answering for lithium battery can be greatly expanded by drawing
With field and range.
Detailed description of the invention
Fig. 1 is structure diagram of the invention；
Fig. 2 is one schematic diagram of lithium battery packaging film structure；
Fig. 3 is two schematic diagram of lithium battery packaging film structure；
Fig. 4 is single group chip battery structure chart；
Fig. 5 is double group chip battery structure charts；
Fig. 6 is three groups of chip battery structure charts.
Specific embodiment
The specific technical solution of the present invention described further below, in order to which those skilled in the art is further understood that
The present invention, without constituting the limitation to its right.
A kind of ultra-thin lithium cell, including battery and packaging diaphragm,
The packaging diaphragm 1 is that the packaging diaphragm of anode made of being die cut as lithium battery packaging film and/or cathode pack diaphragm,
The lithium battery packaging film is combined by outer protective layer 7 and interior metal layer 9, at least in the inner surface of metal layer
Equipped with by chemically treated corrosion-resistant coating 10,
The polar material layer of the battery is attached to the inner surface of the corrosion-resistant coating of packaging diaphragm metal layer, packs the gold of diaphragm
Belong to collector of the layer as lithium battery；
The metal layer strip 2 as battery pole ear directly reserved when the avris portion for packing diaphragm is equipped with cross cutting,
It is equipped with hot-melting sealed cushion rubber 6 between two packaging diaphragms of battery surrounding, it is viscous for the heat-sealing between two packaging diaphragms
It closes, forms lithium battery.
The battery includes one or more groups of chips, and every group of chip includes positive polarity material layer 3, medial septum layer 4
With negative polarity material layer 5；When the battery is multiple groups chip, the same polarity material layer between adjacent chips is oppositely arranged, and
The current collector material layer with tab is equipped between two same polarity material layers.
Copper foil layer is used when the current collector material layer is cathode, with a thickness of 5 ~ 20 μm.
It is equipped on two surfaces of the copper foil layer through chemically treated corrosion-resistant coating.
Aluminium foil layer is used when the current collector material layer is anode, with a thickness of 7 ~ 20 μm.
It is equipped on two surfaces of the aluminium foil layer through chemically treated corrosion-resistant coating.
Adhesive phase 8 is equipped between the outer protective layer and interior metal layer of lithium battery packaging film.
The outer protective layer of the lithium battery packaging film is pet layer or nylon layer, with a thickness of 8 ~ 20 μm.
Copper foil layer that the metal layer of cathode packaging diaphragm is 10 ~ 30 μm of thickness or using stainless with a thickness of 6 ~ 20 μm
Steel layer；The aluminium foil layer that the metal layer of the anode packaging diaphragm is 16 ~ 30 μm of thickness.
The hot-melting sealed cushion rubber is modified PE cushion rubber or MODIFIED PP cushion rubber.
The corrosion-resistant coating is with a thickness of 0.01 ~ 0.1 μm.
The hot-melting sealed cushion rubber is modified PE cushion rubber or MODIFIED PP cushion rubber.The thickness of hot-melting sealed cushion rubber be less than or
Equal to the thickness summation of battery, the width of hot-melting sealed cushion rubber frame is 1 ~ 2mm.
The medial septum layer of the chip is anhydride modified PE or PP, can have very heat-flash to melt Nian Jie make with metal
With.Above-mentioned medial septum layer can be directly used as the use of hot-melting sealed cushion rubber.
Hot-melting sealed cushion rubber can be divided into upper layer and lower layer.
Lithium battery peripheral sealing, the edge exposed part after cutting paint suitable insulating cement, prevent external contact short
Road.
By lithium battery packaging film by being die cut, metal layer is drawn to be used packaging diaphragm directly as tab.
The surface of metal layer is to use the mixed solution of chromic salts, acid, fluoride to gold by chemically treated corrosion-resistant coating
Belong to layer surface to be chemically treated, in the compact metal oxide film layer that layer on surface of metal is formed, with a thickness of 0.2 μm -1.2 μm；
The chromic salts is one or any two kinds of mixing of potassium bichromate, chromium oxide, sodium dichromate, and chromic salts is in mixed solution
Mass percent concentration is 0.2%-1.2%；The acid is one or any two kinds of mixing of hydrochloric acid, sulfuric acid, phosphoric acid, and acid exists
Mass percent concentration in mixed solution is 3%-15%；The fluoride be ammonium fluoride, potassium fluoride, sodium fluoride one kind or
Any two kinds of mixing of person, mass percent concentration of the fluoride in mixed solution is 0.1%-1%.
Fig. 4 is single group chip battery structure chart；
Fig. 5 is double group chip battery structure charts；Copper foil layer is used when the current collector material layer is cathode, with a thickness of 5 ~ 20 μm.
It is described to can be set on two surfaces of copper foil layer through chemically treated corrosion-resistant coating.Tab is extended by current collector material layer
Item.
Fig. 6 is three groups of chip battery structure charts.Copper foil layer is used when the current collector material layer is cathode, with a thickness of 5 ~ 20
μm.It is described to be equipped on two surfaces of copper foil layer through chemically treated corrosion-resistant coating.When the current collector material layer is anode
Using aluminium foil layer, with a thickness of 7 ~ 20 μm.It is described to be equipped on two surfaces of aluminium foil layer through chemically treated corrosion-resistant coating.By collecting
Fluid material layer extends tab item.
Due to ultra-thin design structure, battery has certain flexibility, can be bent camber or S-shaped etc., is more convenient
Later for drawing the application field and range that can greatly expand lithium battery in the structure design of electronic product.
Claims (10)
1. a kind of ultra-thin lithium cell, it is characterised in that: including battery and diaphragm is packed,
The packaging diaphragm is that the packaging diaphragm of anode made of being die cut as lithium battery packaging film and/or cathode pack diaphragm,
The lithium battery packaging film is combined by outer protective layer and interior metal layer, is at least set in the inner surface of metal layer
Have through chemically treated corrosion-resistant coating,
The polar material layer of the battery is attached to the inner surface of the corrosion-resistant coating of packaging diaphragm metal layer, packs the gold of diaphragm
Belong to collector of the layer as lithium battery；
The metal layer strip as battery pole ear directly reserved when the avris portion for packing diaphragm is equipped with cross cutting,
It is equipped with hot-melting sealed cushion rubber between two packaging diaphragms of battery surrounding, it is viscous for the heat-sealing between two packaging diaphragms
It closes, forms lithium battery.
2. ultra-thin lithium cell according to claim 1, it is characterised in that: the battery includes one or more groups of chips,
Every group of chip includes positive polarity material layer, medial septum layer and negative polarity material layer；When the battery is multiple groups chip, phase
Same polarity material layer between adjacent chip is oppositely arranged, and the current collector material with tab is equipped between two same polarity material layers
Layer.
3. ultra-thin lithium cell according to claim 2, it is characterised in that: use copper when the current collector material layer is cathode
Layers of foil, with a thickness of 5 ~ 20 μm.
4. ultra-thin lithium cell according to claim 3, it is characterised in that: be equipped with and pass through on two surfaces of the copper foil layer
Chemically treated corrosion-resistant coating.
5. ultra-thin lithium cell according to claim 2, it is characterised in that: use aluminium when the current collector material layer is anode
Layers of foil, with a thickness of 7 ~ 20 μm.
6. ultra-thin lithium cell according to claim 5, it is characterised in that: be equipped with and pass through on two surfaces of the aluminium foil layer
Chemically treated corrosion-resistant coating.
7. ultra-thin lithium cell according to claim 1, it is characterised in that: the outer protective layer and internal layer of lithium battery packaging film
Adhesive phase is equipped between metal layer.
8. ultra-thin lithium cell according to claim 1, it is characterised in that: the outer protective layer of the lithium battery packaging film is
Pet layer or nylon layer, with a thickness of 8 ~ 20 μm.
9. ultra-thin lithium cell according to claim 1, it is characterised in that: the metal layer of the cathode packaging diaphragm is thickness
10 ~ 30 μm of copper foil layer or using the stainless steel layer with a thickness of 6 ~ 20 μm；It is described anode packaging diaphragm metal layer be thickness 16 ~
30 μm of aluminium foil layer.
10. ultra-thin lithium cell according to claim 1, it is characterised in that: the hot-melting sealed cushion rubber is modified PE glue
Circle or MODIFIED PP cushion rubber.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910774980.3A CN110380107A (en) | 2019-08-21 | 2019-08-21 | Ultra-thin lithium cell |
| JP2022600013U JP3238559U (en) | 2019-08-21 | 2019-12-25 | ultra-thin lithium battery |
| KR1020217034410A KR20210143861A (en) | 2019-08-21 | 2019-12-25 | Ultra-thin lithium battery |
| PCT/CN2019/128355 WO2021031494A1 (en) | 2019-08-21 | 2019-12-25 | Ultrathin lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910774980.3A CN110380107A (en) | 2019-08-21 | 2019-08-21 | Ultra-thin lithium cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110380107A true CN110380107A (en) | 2019-10-25 |
Family
ID=68260133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910774980.3A Pending CN110380107A (en) | 2019-08-21 | 2019-08-21 | Ultra-thin lithium cell |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP3238559U (en) |
| KR (1) | KR20210143861A (en) |
| CN (1) | CN110380107A (en) |
| WO (1) | WO2021031494A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2021031494A1 (en) * | 2019-08-21 | 2021-02-25 | 连云港德立信电子科技有限公司 | Ultrathin lithium battery |
| WO2021249341A1 (en) * | 2020-06-08 | 2021-12-16 | 华为技术有限公司 | Lithium ion battery and terminal device comprising lithium ion battery |
| WO2022092614A1 (en) * | 2020-10-27 | 2022-05-05 | 주식회사 엘지에너지솔루션 | Secondary battery having anti-corrosion layer on inner surface of battery case |
| CN115275458A (en) * | 2022-07-22 | 2022-11-01 | 深圳新源柔性科技有限公司 | Flip thin-film battery and preparation method thereof |
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- 2019-12-25 KR KR1020217034410A patent/KR20210143861A/en active IP Right Grant
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- 2019-12-25 WO PCT/CN2019/128355 patent/WO2021031494A1/en active Application Filing
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Also Published As
| Publication number | Publication date |
|---|---|
| KR20210143861A (en) | 2021-11-29 |
| JP3238559U (en) | 2022-08-03 |
| WO2021031494A1 (en) | 2021-02-25 |
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