CN106159315B - Flexible battery and preparation method thereof - Google Patents
Flexible battery and preparation method thereof Download PDFInfo
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- CN106159315B CN106159315B CN201510183721.5A CN201510183721A CN106159315B CN 106159315 B CN106159315 B CN 106159315B CN 201510183721 A CN201510183721 A CN 201510183721A CN 106159315 B CN106159315 B CN 106159315B
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- accommodating space
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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
- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
-
- 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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/463—Separators, membranes or diaphragms characterised by their shape
-
- 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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- 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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- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Secondary Cells (AREA)
Abstract
The present invention provides a kind of flexible batteries and preparation method thereof.Flexible battery includes the first pole piece, the first packaging plastic, the second pole piece, the second packaging plastic, isolation film and non-solid electrolyte.First pole piece includes: the first collector, folds and forms at least one accommodating space；Primary diaphragm is arranged on opposite two inner surfaces of each accommodating space of formation of the first collector.First packaging plastic surrounds corresponding primary diaphragm and covers the inner surface in the first collector.Second pole piece and the first pole piece electric polarity are inserted in a corresponding accommodating space on the contrary, each second pole piece includes: the second collector；Secondary diaphragm is arranged on two inner surfaces of the second collector.Second packaging plastic is around secondary diaphragm and covers on the inner surface of the second collector.Isolation film is inserted in each accommodating space, the corresponding isolation film of each accommodating space and corresponding first packaging plastic and the second encapsulation glue sticking.Non-solid electrolyte-impregnated primary diaphragm, secondary diaphragm and isolation film.
Description
Technical field
The present invention relates to energy storage device fields more particularly to a kind of flexible battery and preparation method thereof.
Background technique
Since lithium ion battery has many advantages, such as, such as voltage is high, small in size, light weight, specific capacity are high, memoryless effect
Answer, be pollution-free, self discharge is small and has extended cycle life so that its field of mobile equipment application obtained unprecedented development,
Including mobile phone, video camera, laptop and other portable electronics etc..As the technology to mobile convenience devices is opened
The growth of hair and its demand, the demand sharp increase of the secondary cell as the energy.In such secondary cell, to high energy
The research of the lithium secondary battery of metric density and discharge voltage is carried out extensively, has been widely applied at present.
With the inclination of consumer, electronic equipment gradually tends to miniaturization, slimming, abnormal shapeization.In such battery design
In, need to make the shape of battery to realize diversification with the shape of equipment, and the inside for being necessary to effectively use equipment is empty
Between, therefore many batteries are needed by with designing in a manner of flexible.
The Chinese patent application publication No. disclosed on August 14th, 2013 is that the patent document of CN103247768A discloses
A kind of electric energy supply unit and its ceramic separating layer, the ceramic separating layer be set to first electrode substrate and second electrode substrate it
Between, it is sticked together and is formed by double solid systems by plural ceramic particle, double solid systems include linear polymeric and build bridge high
Molecule.It is equivalent to solid electrolyte using the ceramic separating layer, can effectively prevent short circuit caused by positive and negative electrode contact, but
The dynamic performance for but greatly reducing battery simultaneously, so that active ion is difficult to migrate back and forth；And very with ceramic separating layer
Difficult and colloid is bonded, the reason is that ceramics are mainly metal oxide Al2O3, it is difficult to form Van der Waals force with colloid or has
The chemical bond of effect, so as to cause the failure of encapsulation.
On July 10th, 2013, the Chinese patent application Authorization Notice No. of Granted publication was literary for the patent of CN203056029U
Offer and disclose a kind of thin film flexible lithium battery electric core comprising the lithium diaphragm that is from top to bottom sequentially stacked, insulation diaphragm piece and
Anode diaphragm, and lithium diaphragm and anode film piece side are connected with cathode tab and anode tab respectively, and use solid-state
Electrolyte.The disadvantage of structure maximum is that outer tab must be connected, and causes loss and material and the process cost of energy density
Waste.
Summary of the invention
In view of the problems in the background art, the purpose of the present invention is to provide a kind of flexible battery and its preparation sides
Method can improve the package strength of flexible battery.
Another object of the present invention is to provide a kind of flexible batteries and preparation method thereof, can improve the dynamic of flexible battery
Mechanical property and energy density.
A further object of the present invention is to provide a kind of flexible batteries and preparation method thereof, can improve the life of flexible battery
Continuity is produced, cost is reduced, simplifies process.
To achieve the goals above, in a first aspect, the present invention provides a kind of flexible batteries comprising the first pole piece,
First packaging plastic, the second pole piece, the second packaging plastic, isolation film and non-solid electrolyte.First pole piece includes: the first afflux
Body folds and forms at least one accommodating space；And primary diaphragm, each accommodating space of formation of the first collector is set
On two opposite inner surfaces.First packaging plastic surrounds corresponding primary diaphragm and covers the inner surface in the first collector
On.Second pole piece is with the first pole piece electric polarity on the contrary, corresponding with accommodating space quantity in quantity, and each second pole piece includes:
Two collectors are inserted in a corresponding accommodating space；And secondary diaphragm, it is arranged on two inner surfaces of the second collector.The
Two packaging plastics are around corresponding secondary diaphragm and cover on the inner surface of corresponding second collector.Isolation film is inserted in each receipts
Hold space and by each accommodating space the first pole piece and the second pole piece separate, and the corresponding isolation film of each accommodating space and the receipts
Hold corresponding first packaging plastic in space and the second encapsulation glue sticking.Non-solid electrolyte is for impregnating primary diaphragm, secondary diaphragm
And isolation film.
To achieve the goals above, in second aspect, the present invention provides a kind of preparation methods of flexible battery, for making
For the flexible battery described according to a first aspect of the present invention comprising step: determine the first collector is bent to form receiving sky
Between quantity；The corresponding accommodating space by formation, is intermittently arranged the first film on the corresponding inner surface of the first collector
Piece, to form the first pole piece；The corresponding accommodating space by formation, is arranged the second film on two inner surfaces of each second collector
Piece, to form the second pole piece；By all the first pole pieces, whole isolation films, all water removal is dried in the second pole piece；In the first collection
The first packaging plastic is covered around each primary diaphragm on the corresponding inner surface of fluid；In the corresponding inner surface of the second collector
It is upper to cover the second packaging plastic around each secondary diaphragm；Isolation film is combined to and is provided with primary diaphragm and has covered the first packaging plastic
The first collector on, and carry out hot pressing into complex；Make non-solid electrolyte-impregnated primary diaphragm and isolation film；It will answer
Zoarium folds number corresponding with the quantity of the accommodating space of the determination at the interval of the first collector, described true to be formed
The accommodating space of fixed number amount；It will be provided with that secondary diaphragm is corresponding with each second collector of the second packaging plastic is covered to be inserted into one
A accommodating space, and carry out hot-rolling pressure；And be melted into, flexible battery is made.
Beneficial effects of the present invention are as follows:
In flexible battery according to the present invention, the first packaging plastic and the second packaging plastic are covered respectively in corresponding first collection
On fluid and the second collector, for being bonded isolation film, because isolation film contains hole, with the first packaging plastic and the second packaging plastic
Contact surface area it is bigger even form the convered structure that is connected, the bonding force between object is greatly improved, to improve flexible electrical
The package strength in pond；Using non-solid electrolyte compared to solid electrolyte is used, can be improved flexible battery dynamics
Performance and energy density, and cost can be reduced；In addition, also and the continuous production of flexible battery can be improved, reduce cost, simplification
Process.
Detailed description of the invention
Fig. 1 is the perspective view of an embodiment of flexible battery according to the present invention；
Fig. 2 is cross-sectional view made by A~A line along Fig. 1；
Fig. 3 is the exploded perspective view of Fig. 1；
Fig. 4 is the perspective view of an embodiment of flexible battery according to the present invention；
Fig. 5 is the perspective view of an embodiment of flexible battery according to the present invention；
Fig. 6 is the perspective view of an embodiment of flexible battery according to the present invention.
Wherein, the reference numerals are as follows:
1 first pole piece, 31 second collector
11 first collector, 311 inner surface
111 accommodating space, 32 secondary diaphragm
112 inner surface, 4 second packaging plastic
113 outer surface, 5 isolation film
12 primary diaphragm W width directions
2 first packaging plastic L length directions
3 second pole piece T thickness directions
Specific embodiment
It is described in detail flexible battery according to the present invention and preparation method thereof with reference to the accompanying drawings.
Illustrate flexible battery according to a first aspect of the present invention first.
Referring to figs. 1 to Fig. 6, flexible battery according to a first aspect of the present invention include: the first pole piece 1, the first packaging plastic 2,
Second pole piece 3, the second packaging plastic 4, isolation film 5 and non-solid electrolyte (not shown).First pole piece 1 includes: the first afflux
Body 11 folds and forms at least one accommodating space 111；And primary diaphragm 12, the formation that the first collector 11 is arranged in are each
On opposite two inner surface 112 of accommodating space 111.First packaging plastic 2 is around corresponding primary diaphragm 12 and covers
On the inner surface 112 of first collector 11 set by corresponding primary diaphragm 12.1 electrode of second pole piece 3 and the first pole piece
Property is on the contrary, corresponding with 111 quantity of accommodating space in quantity, and each second pole piece 3 includes: the second collector 31, is inserted in correspondence
One accommodating space 111；And secondary diaphragm 32, it is arranged on two inner surfaces 311 of the second collector 31.Second packaging plastic
4 surround corresponding secondary diaphragm 32 and cover the inner surface 311 of second collector 31 set by corresponding secondary diaphragm 32
On.Isolation film 5, is inserted in each accommodating space 111, and by each accommodating space 111 the first pole piece 1 and the second pole piece 3 separate
And by the secondary diaphragm 32 and the second packaging plastic 4 of the primary diaphragm 12 of the first pole piece 1 and the first packaging plastic 2 and the second pole piece 3 every
It opens, the corresponding isolation film 5 of each accommodating space 111 first packaging plastic 2 corresponding with the accommodating space 111 and the second packaging plastic 4 are viscous
It connects.The non-solid electrolyte is for impregnating primary diaphragm 12, secondary diaphragm 32 and isolation film 5.It is described herein to be, inside
Surface 112 and inner surface 311 are to accommodate with respect to for accommodating space 111 because the first collector 11 forms at least one
Space 111, and the second collector 31 is inserted in a corresponding accommodating space 111.
In flexible battery according to the present invention, the first packaging plastic 2 and the second packaging plastic 4 are covered respectively corresponding first
On collector 11 and the second collector 31, for being bonded isolation film 5 because isolation film 5 contains hole, with the first packaging plastic 2 and
The contact surface area of second packaging plastic 4 is bigger even to form the convered structure that is connected, and greatly improves the bonding force between object, thus
Improve the package strength of flexible battery；Using non-solid electrolyte compared to solid electrolyte is used, flexible battery can be improved
Dynamic performance and energy density, and cost can be reduced；In addition, can also improve the continuity of the production of flexible battery, drop
Low cost simplifies process.
In an embodiment of flexible battery according to a first aspect of the present invention, the isolation film 5 in each accommodating space 111 can
Think one or more, can be single-layer or multi-layer, can be selected depending on actual conditions.
In an embodiment of flexible battery according to a first aspect of the present invention, referring to figs. 1 to Fig. 3, Fig. 4, Fig. 5, first
Collector 11 is foldable and forms an accommodating space 111, and the second pole piece 3 is quantitatively one.Herein it should be noted that,
The present invention it is foldable to the first collector 11 and formed accommodating space 111 quantity and the second pole piece 3 quantity with no restrictions,
First collector 11 it is foldable and formed the quantity of accommodating space 111 and the quantity of the second pole piece 3 can adapt to as needed
It sexually revises, for example, the first collector 11 is foldable and forms two accommodating spaces 111, and second in the example shown in Fig. 6
In 3 quantity of pole piece be two, similarly, the first collector 11 it is foldable and formed accommodating space 111 quantity can also be three
More than, and accordingly, the quantity of the second pole piece 3 is three or more.Certainly, for flexible battery, it is desirable that flexible battery is got over
Thin (i.e. the through-thickness T in figure), then required 111 quantity of accommodating space formed is fewer, empty using a receiving when most thin
Between 111.
In an embodiment of flexible battery according to a first aspect of the present invention, the thickness of the first collector 11 can be 20 μm
~100 μm.When the thickness of the first collector 11 is less than 20 μm, since the first collector 11 contains hole, can make in air
Steam enters, and leads to the final flatulence failure of flexible battery.When the thickness of the first collector 11 is greater than 100 μm, the first collector
11 flexibility is insufficient and influences energy density, is not suitable for being used to make flexible battery.
In an embodiment of flexible battery according to a first aspect of the present invention, referring to figs. 1 to Fig. 3, Fig. 4, Fig. 5, fold
The outer surface 113 of the first collector 11 can be used as the first tab.To which the flexible battery that this hair is invented does not need external the
Energy density can be improved by using the first tab that the first collector 11 is directly formed in one tab, and can be according to product
Position, the size, shape for needing advantageously to select the first tab, improve the adaptability of product.
Primary diaphragm in an embodiment of flexible battery according to a first aspect of the present invention, in each accommodating space 111
Each edge of 12 inner surface 112 apart from corresponding first collector 11 is not less than 2mm.The distance can be the first packaging plastic 2
Corresponding width, the distance are not less than 2mm primarily to reserving enough spaces to the first packaging plastic 2, guarantee the reliable of encapsulation
Property.
In an embodiment of flexible battery according to a first aspect of the present invention, the first collector 11 can for aluminium foil, copper foil,
One of stainless steel foil.
In an embodiment of flexible battery according to a first aspect of the present invention, the electric polarity of the first pole piece 1 can be positive, the
Active material in one diaphragm 12 is at least one of cobalt acid lithium, LiFePO4, ternary system.Certainly, primary diaphragm 12 is gone back
It may include other materials, such as conductive agent, binder.
In an embodiment of flexible battery according to a first aspect of the present invention, the first packaging plastic 2 can be esters of acrylic acid
At least one of glue, epoxy resin glue, organic silicon glue, hot melt class glue.
In an embodiment of flexible battery according to a first aspect of the present invention, the thickness of the second collector 31 can be 20 μm
~100 μm.When the thickness of the second collector 31 is less than 20 μm, since the second collector 31 contains hole, can make in air
Steam enters, and leads to the final flatulence failure of flexible battery.When the thickness of the second collector 31 is greater than 100 μm, the second collector
31 flexibility is insufficient and influences energy density, is not suitable for being used to make flexible battery.
In an embodiment of flexible battery according to a first aspect of the present invention, referring to figs. 1 to Fig. 2, Fig. 4 and Fig. 6,
Two collectors, 31 part can be inserted into a corresponding accommodating space 111 so that 31 part of the second collector (the exposed portion in the figure
Point position along the direction width W) it is exposed and be used as the second tab.To which the flexible battery of this hair invention does not need external second pole
Energy density can be improved by using the second tab that the second collector 31 is directly formed in ear, and can be according to the needs of product
Position, the size, shape for advantageously selecting the second tab, improve the adaptability of product.It should be noted that when using
When flexible battery shown in fig. 6, each second collector 31 has exposed parts, may be used as the second tab, and they it
Between need to be electrically connected.Certainly, in Fig. 6, the exposed parts of each second collector 31 can also be set along the direction length L
It sets, consequently facilitating being electrically connected ipsilateral.
Secondary diaphragm in an embodiment of flexible battery according to a first aspect of the present invention, in each accommodating space 111
Each edge of 32 inner surface 311 apart from corresponding second collector 31 is not less than 2mm.The distance can be pair of the second packaging plastic 4
Width is answered, which is not less than 2mm primarily to reserving enough spaces to the second packaging plastic 4, guarantees the reliability of encapsulation.
In an embodiment of flexible battery according to a first aspect of the present invention, the second collector 31 can for aluminium foil, copper foil,
One of stainless steel foil.
In an embodiment of flexible battery according to a first aspect of the present invention, the electric polarity of the second pole piece 3 can be negative, the
The active material of two diaphragms 32 is at least one of natural graphite, artificial graphite.Certainly, secondary diaphragm 32 may also include other
Substance, such as conductive agent, binder.
In an embodiment of flexible battery according to a first aspect of the present invention, the second packaging plastic 4 can be esters of acrylic acid
At least one of glue, epoxy resin glue, organic silicon glue, hot melt class glue.
In an embodiment of flexible battery according to a first aspect of the present invention, isolation film 5 can be polyolefin base material, surface
It is coated at least one of the polyolefin base material of bonding agent.Compared with the prior art, isolation film 5 of the invention is applied without containing ceramics
Layer, thus, it is possible to improve the reliability Nian Jie with the first packaging plastic 2 and the second packaging plastic 4 of isolation film 5.In one embodiment, institute
Stating bonding agent can be one of SBR, PVDF.
In an embodiment of flexible battery according to a first aspect of the present invention, non-solid electrolyte can be containing LiPF6
Liquid electrolyte or contain LiPF6One of gel electrolyte.
In an embodiment of flexible battery according to a first aspect of the present invention, referring to figs. 1 to Fig. 3, Fig. 4, Fig. 5, Fig. 6,
The outer profile of the flexible battery can be W-shaped at step in the width direction.Herein it should be noted that, flexible battery of the invention it is outer
Profile is not limited to this, and according to the present invention can conceive and spirit makes change, form the special-shaped flexible battery of arbitrary shape.
In an embodiment of flexible battery according to a first aspect of the present invention, referring to Fig. 4, the foreign steamer of the flexible battery
Exterior feature W and length direction L can be respectively formed step in the width direction.Herein it should be noted that, the outer profile of flexible battery of the invention
It is not limited to this, according to the present invention can conceive and spirit makes change, form the special-shaped flexible battery of arbitrary shape.
In an embodiment of flexible battery according to a first aspect of the present invention, referring to Fig. 5, the foreign steamer of the flexible battery
It is wide that W and length direction L do not form step in the width direction.
The preparation method of flexible battery according to a second aspect of the present invention will be illustrated next.
The preparation method of flexible battery according to a second aspect of the present invention is used to prepare described according to a first aspect of the present invention
Flexible battery comprising step: determine the quantity for being bent to form accommodating space 111 of the first collector 11；It is corresponding to be formed
Accommodating space 111, primary diaphragm 12 is intermittently set on the corresponding inner surface 112 of the first collector 11, with formed
First pole piece 1；The corresponding accommodating space 111 by formation, is arranged the second film on two inner surfaces 311 of each second collector 31
Piece 32, to form the second pole piece 3；By all the first pole pieces 1, whole isolation films 5, all water removal is dried in the second pole piece 3；?
The first packaging plastic 2 is covered and (coats or paste) around each primary diaphragm 12 on the corresponding inner surface 112 of first collector 11；
The second packaging plastic 4 is covered and (coats or paste) around each secondary diaphragm 32 on the corresponding inner surface 311 of the second collector 31；
Isolation film 5 is combined to and is provided with primary diaphragm 12 and covers on the first collector 11 of the first packaging plastic 2, and carries out hot pressing
Form complex；Make non-solid electrolyte-impregnated primary diaphragm 12, secondary diaphragm 32 and isolation film 5；By complex first
Number corresponding with the quantity of accommodating space 111 of the determination is folded at the interval of collector 11, to form the determining number
The accommodating space 111 of amount；Secondary diaphragm 32 will be provided with and covers the corresponding insertion of each second collector 31 of the second packaging plastic 4
To an accommodating space 111, and carry out hot-rolling pressure；And be melted into, flexible battery is made.It is described herein to be, inside table
For face 112 and inner surface 311 are opposite accommodating space 111, because to form at least one receiving empty for the first collector 11
Between 111, and the second collector 31 is inserted in a corresponding accommodating space 111.
In the preparation method of flexible battery according to a second aspect of the present invention, the temperature of dry water removal can be 60 DEG C~90
DEG C, the time of dry water removal can be 4h~12h.The time of the temperature of dry water removal and dry water removal is reciprocal influence factor,
When temperature and time is too low, water removal is insufficient, and flexible battery flatulence is caused to fail；It is right when temperature and time is excessively high
The contraction of isolation film 5 and the performance of diaphragm (i.e. primary diaphragm 12 and secondary diaphragm 32) have an impact.
In the preparation method of flexible battery according to a second aspect of the present invention, the humidity of dry water removal is no more than 2%
RH.It can be lost to avoid flexible battery flatulence in steam inlet membrane (i.e. primary diaphragm 12 and/or secondary diaphragm 32), is eventually led to
Effect.
In the preparation method of flexible battery according to a second aspect of the present invention, hot pressing temperature can be 70 DEG C~90 DEG C, heat
Pressure pressure can be 0.2MPa~1MPa, and hot pressing time can be 1s~10s.Temperature, pressure and time are interactional factors, when
When temperature, pressure, time too low (i.e. temperature less than 90 DEG C, hot pressing pressure is less than 0.2MPa, hot pressing time is less than 1s), not only boundary
The laminating degree in face is not close, can also make the packaging effect of packaging area (i.e. the first packaging plastic 2 and the second packaging plastic 4) bad；
When temperature, pressure, time excessively high (i.e. temperature is greater than 90 DEG C, hot pressing pressure is greater than 1MPa, hot pressing time is greater than 10s), isolation
Film 5 is easy to shrink, and has the risk of short circuit, and the particle of diaphragm (i.e. primary diaphragm 12 and/or secondary diaphragm 32) can fall off, shadow
Ring the performance of capacity.
In the preparation method of flexible battery according to a second aspect of the present invention, the non-solid amount of electrolyte of spraying can be
0.0020g/mAh~0.0030g/mAh.When the amount of non-solid electrolyte is less than 0.0030g/mAh, make the power of flexible battery
Learn reduced performance, it is difficult to play enough capacity；When the amount of non-solid electrolyte is greater than 0.0030g/mAh, excessive is non-
Solid electrolyte can destroy the laminating degree between diaphragm and diaphragm, make the reduction of pliability of flexible battery.
In the preparation method of flexible battery according to a second aspect of the present invention, the temperature of hot-rolling pressure can be 70 DEG C~90
DEG C, the pressure of hot-rolling pressure can be 0.2MPa~1MPa.Temperature and pressure is interactional factor, when temperature, hypotony (i.e.
Temperature is less than 0.2MPa less than 70 DEG C, pressure) when, not only the laminating degree at interface is not close, can also make packaging area (i.e. first
Packaging plastic 2 and the second packaging plastic 4) packaging effect it is bad；When (i.e. temperature is greater than greater than 90 DEG C, pressure for temperature, hypertonia
When 1MPa), isolation film 5 is easy to shrink, and has the risk of short circuit, and diaphragm (i.e. primary diaphragm 12 and/or secondary diaphragm 32)
Particle can fall off, and influence the performance of capacity.
In the preparation method of flexible battery according to a second aspect of the present invention, the electric current of chemical conversion is no more than 0.1C.When
When the electric current of chemical conversion is greater than 0.1C, current density is inhomogenous, will cause this flexible battery and is using the non-solid electrolysis containing lithium
Lithium is locally analysed when matter, also will affect the performance of capacity.
In the preparation method of flexible battery according to a second aspect of the present invention, make non-solid electrolyte-impregnated primary diaphragm
12, the method for secondary diaphragm 32 and isolation film 5 can are as follows: in the corresponding isolation film 5 or second of primary diaphragm 12 of complex
Non-solid electrolyte is sprayed on diaphragm 32.It should be noted that, the non-solid electrolyte need to avoid being sprayed onto the first packaging plastic 2 herein
On the second packaging plastic 4.
Flexible battery of the invention can be applied to watchband, ornament, on wearable dress ornament, easy to carry, slim and graceful.
Will be illustrated next the embodiment of the preparation method of flexible battery according to the present invention, comparative example, test process and
Test result.
Embodiment 1
The quantity for being bent to form accommodating space 111 for determining the first collector 11 is 1；
The intermittently coating setting two on the corresponding inner surface 112 with a thickness of 20 μm of the first collector 11 (copper foil)
Locate primary diaphragm 12 (active material is natural graphite), to form the first pole piece 1；
The coating setting secondary diaphragm 32 on two inner surfaces 311 with a thickness of 20 μm of the second collector 31 (aluminium foil)
(active material is cobalt acid lithium), to form the second pole piece 3；
Water removal, the temperature of dry water removal is dried in first pole piece 1, isolation film 5 (polyolefin base material), the second pole piece 3
Time for 60 DEG C, dry water removal is 4h, the humidity of dry water removal is 2%RH；
2 (ring of the first packaging plastic is coated around each primary diaphragm 12 on the corresponding inner surface 112 of the first collector 11
Oxygen resinae glue)；
4 (epoxy of the second packaging plastic is coated around each secondary diaphragm 32 on the corresponding inner surface 311 of the second collector 31
Resinae glue)；
Isolation film 5 is combined to coat and is provided with primary diaphragm 12 and covers the first collector 11 of the first packaging plastic 2
On, and carry out hot pressing into complex, hot pressing temperature is 70 DEG C, hot pressing pressure 0.2MPa, hot pressing time 1s；
Corresponding 12 region of primary diaphragm spraying contains LiPF on isolation film 56Liquid electrolyte, the amount of electrolyte is
0.0020g/mAh, so that electrolyte dipping primary diaphragm 12 and isolation film 5；
Complex is folded at the interval of the first collector 11 once, to form the accommodating space of the quantification
111；
The second collector 31 correspondence that coating is provided with secondary diaphragm 32 and covers the second packaging plastic 4 is inserted into the receipts
Hold space 111, and carry out hot-rolling pressure, the temperature of hot-rolling pressure is 70 DEG C, the pressure of hot-rolling pressure is 0.2MPa；And
It is melted into using the electric current of 0.1C, flexible battery is made.
Embodiment 2
The quantity for being bent to form accommodating space 111 for determining the first collector 11 is 1；
It is intermittently coated on the corresponding inner surface 112 with a thickness of 100 μm of the first collector 11 (stainless steel foil)
Primary diaphragm 12 at two (active material is artificial graphite) is set, to form the first pole piece 1；
The coating setting secondary diaphragm 32 on two inner surfaces 311 with a thickness of 100 μm of the second collector 31 (aluminium foil)
(active material is LiFePO4), to form the second pole piece 3；
First pole piece 1, isolation film 5 (polyolefin base material that surface is coated with PVDF bonding agent), the second pole piece 3 are dried
Water removal, the temperature of dry water removal is 90 DEG C, the time of dry water removal is 12h, the humidity of dry water removal is 0.5%RH；
The first packaging plastic 2 (third is coated around each primary diaphragm 12 on the corresponding inner surface 112 of the first collector 11
Olefin(e) acid esters glue)；
4 (propylene of the second packaging plastic is coated around each secondary diaphragm 32 on the corresponding inner surface 311 of the second collector 31
Esters of gallic acid glue)；
Isolation film 5 is combined to coat and is provided with primary diaphragm 12 and covers the first collector 11 of the first packaging plastic 2
On, and carry out hot pressing into complex, hot pressing temperature is 90 DEG C, hot pressing pressure 1MPa, hot pressing time 10s；
Corresponding 12 region of primary diaphragm spraying contains LiPF on isolation film 56Gel state electrolyte, the amount of electrolyte
For 0.0030g/mAh, so that electrolyte dipping primary diaphragm 12, secondary diaphragm 32 and isolation film 5；
Complex is folded at the interval of the first collector 11 once, to form the accommodating space of the quantification
111；
The second collector 31 correspondence that coating is provided with secondary diaphragm 32 and covers the second packaging plastic 4 is inserted into the receipts
Hold space 111, and carry out hot-rolling pressure, the temperature of hot-rolling pressure is 90 DEG C, the pressure of hot-rolling pressure is 1MPa；And
It is melted into using the electric current of 0.01C, flexible battery is made.
Embodiment 3
The quantity for being bent to form accommodating space 111 for determining the first collector 11 is 1；
The intermittently coating setting two on the corresponding inner surface 112 with a thickness of 60 μm of the first collector 11 (aluminium foil)
Locate primary diaphragm 12 (active material is ternary material), to form the first pole piece 1；
The coating setting secondary diaphragm 32 on two inner surfaces 311 with a thickness of 60 μm of the second collector 31 (copper foil)
(active material is artificial graphite), to form the second pole piece 3；
First pole piece 1, isolation film 5 (polyolefin base material that surface is coated with SBR bonding agent), the second pole piece 3 are dried
Water removal, the temperature of dry water removal is 75 DEG C, the time of dry water removal is 8h, the humidity of dry water removal is 1%RH；
Coating the first packaging plastic 2 around each primary diaphragm 12 on the corresponding inner surface 112 of the first collector 11 (has
Machine silicon class glue)；
It is (organic around each secondary diaphragm 32 the second packaging plastic 4 of coating on the corresponding inner surface 311 of the second collector 31
Silicon class glue)；
Isolation film 5 is combined to coat and is provided with primary diaphragm 12 and covers the second collector 31 of the first packaging plastic 2
On, and carry out hot pressing into complex, hot pressing temperature is 80 DEG C, hot pressing pressure 0.6MPa, hot pressing time 6s；
In 32 region of secondary diaphragm, spraying contains LiPF6Gel state electrolyte, the amount of electrolyte is 0.0025g/mAh,
So that electrolyte dipping primary diaphragm 12, secondary diaphragm 32 and isolation film 5；
Complex is folded at the interval of the first collector 11 once, to form the accommodating space of the quantification
111；
The second collector 31 correspondence that coating is provided with secondary diaphragm 32 and covers the second packaging plastic 4 is inserted into the receipts
Hold space 111, and carry out hot-rolling pressure, the temperature of hot-rolling pressure is 80 DEG C, the pressure of hot-rolling pressure is 0.6MPa；And
It is melted into using the electric current of 0.05C, flexible battery is made.
Comparative example 1
In addition to isolation film 5 contains the polyolefin base material of ceramic coating using surface, remaining is same as Example 1.
Test process
The flexible battery of Examples 1 to 3 is numbered, number consecutively is S1~S3, and the flexible battery in comparative example 1 is compiled
Number, number D1.Capacity and encapsulation performance test are carried out to S1~S3 and D1.
Capacity test method are as follows: flexible battery group is stood into 3min first；Then with the charging current constant-current charge of 0.5C
Charging capacity AGC0 is obtained to 0.05C to 4.3V, then constant-voltage charge；Stand 3min；Again with the discharge current constant-current discharge of 0.5C
To 3.0V, discharge capacity D0 for the first time is obtained；It stands 3min and completes volume test later.
Packaging and testing method are as follows: constant temperature stores 7 days at 85 DEG C by flexible battery.Finally whether observation flexible battery has leakage
The phenomenon that liquid and rupture, and test the adhesive strength at the seal after storage.
The test result of table 1 volume test and packaging and testing
As it can be seen from table 1 the capacity of S1~S3 is completely or almost completely played, and flexible battery is by storage
There is no the case where leakage and rupture afterwards, the adhesive strength at seal is all very good.Illustrate using flexible electrical of the invention
The preparation method in pond, the package strength that the good flexible battery of encapsulation performance can be made, improve flexible battery.And the present invention
Flexible battery preparation method be very suitable for actual production operation.
Although the capacity of D1 is also almost played, capacity plays poorer compared with Example 1, and D1 is sent out
Leakage is given birth to, predominantly isolation film surface contains ceramic coating, illustrates that ceramic coating is difficult to encapsulate with the first packaging plastic and second
Glue (epoxy resin glue) forms Van der Waals force or effective chemical bond, so as to cause the failure of encapsulation.
Claims (10)
1. a kind of flexible battery characterized by comprising
First pole piece, comprising:
First collector folds and forms at least one accommodating space；And
Primary diaphragm is arranged on opposite two inner surface of each accommodating space of formation of the first collector；
First packaging plastic around corresponding primary diaphragm and covers on the inner surface of the first collector；
Second pole piece, it is with the first pole piece electric polarity on the contrary, corresponding with accommodating space quantity in quantity, and each second pole piece includes:
Second collector is inserted in a corresponding accommodating space；And
Secondary diaphragm is arranged on two inner surfaces of the second collector, the secondary diaphragm of the second pole piece in each accommodating space
Corresponding primary diaphragm is facing with the first pole piece；
Second packaging plastic around corresponding secondary diaphragm and covers on the inner surface of corresponding second collector；And
Isolation film, is inserted in each accommodating space, and by each accommodating space the first pole piece and the second pole piece separate, and each receiving
The corresponding isolation film in space the first packaging plastic corresponding with the accommodating space and the second encapsulation glue sticking；
Non-solid electrolyte, for impregnating primary diaphragm, secondary diaphragm and isolation film.
2. flexible battery according to claim 1, which is characterized in that the first collector folds and forms a receiving sky
Between, and the second pole piece is quantitatively one.
3. flexible battery according to claim 1, which is characterized in that the outer surface of the first collector of folding is used as the
One tab.
4. flexible battery according to claim 1, which is characterized in that the primary diaphragm in each accommodating space is apart from corresponding
Each edge of the inner surface of one collector is not less than 2mm.
5. flexible battery according to claim 1, which is characterized in that the corresponding receiving of the second collector partial insertion is empty
Between in so that the second afflux body portion it is exposed and be used as the second tab.
6. flexible battery according to claim 1, which is characterized in that the secondary diaphragm in each accommodating space is apart from corresponding
Each edge of the inner surface of two collectors is not less than 2mm.
7. flexible battery according to claim 1, which is characterized in that isolation film is polyolefin base material, surface is coated with bonding
At least one of polyolefin base material of agent.
8. flexible battery according to claim 1, which is characterized in that the outer profile of flexible battery shape in the width direction
At step.
9. flexible battery according to claim 1, which is characterized in that the outer profile of the flexible battery in the width direction and
Length direction is respectively formed step.
10. a kind of preparation method of flexible battery, be used to prepare according to claim 1~any one of 9 described in flexible battery,
Characterized in that it comprises the following steps:
Determine the quantity for being bent to form accommodating space of the first collector；
The corresponding accommodating space by formation, is intermittently arranged primary diaphragm on the corresponding inner surface of the first collector, with
Form the first pole piece；
The corresponding accommodating space by formation, is arranged secondary diaphragm on two inner surfaces of each second collector, to form second
Pole piece；
By all the first pole pieces, whole isolation films, all water removal is dried in the second pole piece；
The first packaging plastic is covered around each primary diaphragm on the corresponding inner surface of the first collector；
The second packaging plastic is covered around each secondary diaphragm on the corresponding inner surface of the second collector；
Isolation film is combined to and is provided with primary diaphragm and covers on the first collector of the first packaging plastic, and carries out hot pressing
At complex；
Make non-solid electrolyte-impregnated primary diaphragm and isolation film；
Complex is folded into number corresponding with the quantity of the accommodating space of the determination at the interval of the first collector, with shape
At the accommodating space of the quantification；
It will be provided with that secondary diaphragm is corresponding with each second collector of the second packaging plastic is covered to be inserted into an accommodating space, and
Carry out hot-rolling pressure；And
It is melted into, flexible battery is made.
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| US10490843B2 (en) * | 2017-04-10 | 2019-11-26 | Nano And Advanced Materials Institute Limited | Flexible battery with 180 degree operational bend radius |
| EP4207425A4 (en) * | 2020-09-30 | 2023-10-25 | Ningde Amperex Technology Ltd. | Liquid battery and electronic device having same |
| CN112803063A (en) * | 2021-03-19 | 2021-05-14 | 国家纳米科学中心 | Flexible lithium ion battery and preparation method and application thereof |
| CN115275326A (en) * | 2022-09-02 | 2022-11-01 | 重庆太蓝新能源有限公司 | Battery cell, preparation method thereof and battery |
| CN116544523B (en) * | 2023-07-04 | 2024-02-27 | 宁德新能源科技有限公司 | Electrochemical device and power consumption terminal |
Citations (3)
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|---|---|---|---|---|
| US6461762B1 (en) * | 2000-04-20 | 2002-10-08 | Industrial Technology Research Institute | Rechargeable battery structure having a stacked structure of sequentially folded cells |
| CN2842758Y (en) * | 2005-09-09 | 2006-11-29 | 东莞新能源电子科技有限公司 | Laminar structure of lithium-ion cell core |
| CN202888312U (en) * | 2012-08-10 | 2013-04-17 | 东莞新能源科技有限公司 | Lithium ion battery electric core and lithium ion battery thereof |
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| JP4744076B2 (en) * | 2003-12-09 | 2011-08-10 | 三洋電機株式会社 | Lithium secondary battery and manufacturing method thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6461762B1 (en) * | 2000-04-20 | 2002-10-08 | Industrial Technology Research Institute | Rechargeable battery structure having a stacked structure of sequentially folded cells |
| CN2842758Y (en) * | 2005-09-09 | 2006-11-29 | 东莞新能源电子科技有限公司 | Laminar structure of lithium-ion cell core |
| CN202888312U (en) * | 2012-08-10 | 2013-04-17 | 东莞新能源科技有限公司 | Lithium ion battery electric core and lithium ion battery thereof |
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