CN106159315A - Flexible battery and preparation method thereof - Google Patents
Flexible battery and preparation method thereof Download PDFInfo
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- CN106159315A CN106159315A CN201510183721.5A CN201510183721A CN106159315A CN 106159315 A CN106159315 A CN 106159315A CN 201510183721 A CN201510183721 A CN 201510183721A CN 106159315 A CN106159315 A CN 106159315A
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- Prior art keywords
- collector
- receiving space
- flexible battery
- pole piece
- packaging plastic
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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
-
- 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
-
- 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)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Secondary Cells (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention provides a kind of flexible battery and preparation method thereof.Flexible battery includes the first pole piece, the first packaging plastic, the second pole piece, the second packaging plastic, isolating membrane and non-solid electrolyte.First pole piece includes: the first collector, folds and formed at least one receiving space；Primary diaphragm, is arranged on relative two inner surfaces forming each receiving space of the first collector.First packaging plastic is around corresponding primary diaphragm and covers the inner surface at the first collector.Second pole piece and the first pole piece electric polarity are contrary, and each second pole piece includes: the second collector, are inserted in a corresponding receiving space；Secondary diaphragm, is arranged on two inner surfacies of the second collector.Second packaging plastic is around secondary diaphragm and covers on the inner surface of the second collector.Isolating membrane is inserted in each receiving space, and the isolating membrane that each receiving space is corresponding is bonding with the first corresponding packaging plastic and the second packaging plastic.Non-solid electrolyte-impregnated primary diaphragm, secondary diaphragm and isolating membrane.
Description
Technical field
The present invention relates to energy storage device field, particularly relate to a kind of flexible battery and preparation method thereof.
Background technology
Owing to lithium ion battery has plurality of advantages, such as voltage is high, volume is little, light weight, specific capacity
Height, memory-less effect, pollution-free, self discharge is little and has extended cycle life so that it is led in mobile device
The application in territory has obtained unprecedented development, including mobile phone, video camera, notebook computer and other
Portable electronics etc..Along with to the technological development of mobile convenience devices and the growth of its demand, as the energy
The demand sharp increase of secondary cell.In such secondary cell, to having high-energy-density and electric discharge
The research of the lithium secondary battery of voltage is extensively carried out, and has the most obtained extensively application.
Along with the inclination of consumer, electronic equipment gradually tends to miniaturization, slimming, abnormal shapeization.At this
In class battery design, need the shape making battery to realize variation with the shape of equipment, and need
Being efficiently used the inner space of equipment, therefore many batteries need to design in the way of having flexibility.
It is the special of CN103247768A in Chinese patent application publication No. disclosed in 14 days Augusts in 2013
Profit document discloses a kind of electric energy feeding unit and ceramic separating layer thereof, and described ceramic separating layer is located at first
Between electrode base board and the second electrode base board, plural number ceramic particle stick together shape by double solid systems
Becoming, double solid systems comprise linear polymeric and bridge formation macromolecule.This ceramic separating layer is used to be equivalent to
Solid electrolyte, can effectively prevent positive and negative electrode from contacting the short circuit caused, but be substantially reduced simultaneously
The dynamic performance of battery so that active ion is difficult to migrate back and forth；And it is difficult to ceramic separating layer
Carrying out bonding with colloid, reason is pottery predominantly metal-oxide Al2O3, it is difficult to and colloid forms model
De Huali or effective chemical bond, thus cause the inefficacy of encapsulation.
On July 10th, 2013, the Chinese patent application Authorization Notice No. of Granted publication was
The patent documentation of CN203056029U discloses a kind of thin film flexible lithium battery electric core, and it includes by up to
Under the lithium diaphragm, insulation diaphragm sheet and the anode diaphragm that are sequentially stacked, and lithium diaphragm and anode film
Sheet side is connected with cathode tab and anode lug respectively, and uses solid electrolyte.This structure maximum
Shortcoming is outer to connect lug, causes the loss of energy density and material and the waste of process cost.
Summary of the invention
In view of problem present in background technology, it is an object of the invention to provide a kind of flexible battery and
Preparation method, it can improve the package strength of flexible battery.
Another object of the present invention is to provide a kind of flexible battery and preparation method thereof, it can improve flexibility
The dynamic performance of battery and energy density.
It is still another object of the present invention to provide a kind of flexible battery and preparation method thereof, it can improve flexibility
The continuous production of battery, reduction cost, simplification operation.
To achieve these goals, in first aspect, the invention provides a kind of flexible battery, it includes
First pole piece, the first packaging plastic, the second pole piece, the second packaging plastic, isolating membrane and non-solid electrolyte.
First pole piece includes: the first collector, folds and formed at least one receiving space；And primary diaphragm,
It is arranged on relative two inner surface forming each receiving space of the first collector.First packaging plastic
Around corresponding primary diaphragm and cover on the inner surface of the first collector.Second pole piece and the first pole
Plate electrode is contrary, corresponding with receiving space quantity in quantity, and each second pole piece includes: the second afflux
Body, is inserted in a corresponding receiving space；And secondary diaphragm, it is arranged on two interior tables of the second collector
On face.Second packaging plastic is around corresponding secondary diaphragm and covers the inner surface at the second corresponding collector
On.Isolating membrane be inserted in each receiving space and by the first pole piece in each receiving space and the second pole piece every
Open, and isolating membrane corresponding to each receiving space first packaging plastic corresponding with this receiving space and the second encapsulation
Gluing connect.Non-solid electrolyte is used for impregnating primary diaphragm, secondary diaphragm and isolating membrane.
To achieve these goals, in second aspect, the invention provides the preparation side of a kind of flexible battery
Method, for the flexible battery that preparation is described according to a first aspect of the present invention, it includes step: determine first
The quantity being bent to form receiving space of collector；The corresponding receiving space that will be formed, at the first collector
Corresponding inner surface on primary diaphragm is set off and on, to form the first pole piece；Correspondence is by formation
Receiving space, arranges secondary diaphragm on two inner surfacies of each second collector, to form the second pole piece；
Whole first pole pieces, whole isolating membrane, whole second pole piece are dried except water；At the first collector
Corresponding inner surface on cover the first packaging plastic around each primary diaphragm；Correspondence at the second collector
Inner surface on cover the second packaging plastic around each secondary diaphragm；It is compound to isolating membrane be provided with the first film
Sheet and covering on the first collector of the first packaging plastic, and carry out hot pressing and become complex；Make non-solid
Electrolyte-impregnated primary diaphragm and isolating membrane；Complex is folded and institute at the interval of the first collector
State the number of times that the quantity of the receiving space determined is corresponding, to form the receiving space of described quantification；Will
Each second collector of being provided with secondary diaphragm and cover the second packaging plastic is corresponding is inserted into a collecting
Space, and carry out hot-rolling pressure；And be melted into, make flexible battery.
Beneficial effects of the present invention is as follows:
According in the flexible battery of the present invention, the first packaging plastic and the second packaging plastic cover respectively in correspondence
The first collector and the second collector on, for bonding isolating membrane, because isolating membrane contains hole, with
The contact surface area of the first packaging plastic and the second packaging plastic is bigger even forms the convered structure that is connected, and significantly carries
Rise the bonding force between object, thus improve the package strength of flexible battery；Use non-solid electrolyte phase
Than in using solid electrolyte, can improve flexible battery dynamic performance and energy density, and energy
Reduce cost；Additionally, also and can improve flexible battery continuous production, reduce cost, simplify operation.
Accompanying drawing explanation
Fig. 1 is the axonometric chart of an embodiment of the flexible battery according to the present invention；
Fig. 2 is the sectional view made along A～the A line of Fig. 1；
Fig. 3 is the exploded perspective view of Fig. 1；
Fig. 4 is the axonometric chart of an embodiment of the flexible battery according to the present invention；
Fig. 5 is the axonometric chart of an embodiment of the flexible battery according to the present invention；
Fig. 6 is the axonometric chart of an embodiment of the flexible battery according to the present invention.
Wherein, description of reference numerals is as follows:
1 first pole piece 31 second collector
11 first collector 311 inner surfacies
111 receiving space 32 secondary diaphragms
112 inner surface 4 second packaging plastics
113 outer surface 5 isolating membrane
12 primary diaphragm W widths
2 first packaging plastic L length directions
3 second pole piece T thickness directions
Detailed description of the invention
Describe flexible battery according to the present invention and preparation method thereof with reference to the accompanying drawings in detail.
First flexible battery according to a first aspect of the present invention is described.
Referring to figs. 1 through Fig. 6, flexible battery according to a first aspect of the present invention includes: the first pole piece 1,
First packaging plastic the 2, second pole piece the 3, second packaging plastic 4, isolating membrane 5 and non-solid electrolyte are (not
Illustrate).First pole piece 1 includes: the first collector 11, folds and formed at least one receiving space
111；And primary diaphragm 12, be arranged on the first collector 11 forms the relative of each receiving space 111
Two inner surfaces 112 on.First packaging plastic 2 is around corresponding primary diaphragm 12 and covers right
On the inner surface 112 of the first collector 11 set by primary diaphragm 12 answered.Second pole piece 3 with
First pole piece 1 electric polarity is contrary, corresponding with receiving space 111 quantity in quantity, and each second pole piece 3
Including: the second collector 31, it is inserted in a corresponding receiving space 111；And secondary diaphragm 32, if
Put on two inner surfacies 311 of the second collector 31.Second packaging plastic 4 is around the second corresponding film
Sheet 32 also covers on the inner surface 311 of the second collector 31 set by corresponding secondary diaphragm 32.
Isolating membrane 5, is inserted in each receiving space 111, and by the first pole piece 1 He in each receiving space 111
Second pole piece 3 separates and by the primary diaphragm 12 of the first pole piece 1 and the first packaging plastic 2 and the second pole piece 3
Secondary diaphragm 32 and the second packaging plastic 4 separate, the isolating membrane of each receiving space 111 correspondence 5 with should
First packaging plastic 2 of receiving space 111 correspondence and the second packaging plastic 4 are bonding.Described non-solid electrolyte
For impregnating primary diaphragm 12, secondary diaphragm 32 and isolating membrane 5.Described herein, inner side table
Face 112 is all for relative receiving space 111 with inner surface 311, because the first collector 11 shape
Become at least one receiving space 111, and the second collector 31 is inserted in a corresponding receiving space 111.
According in the flexible battery of the present invention, the first packaging plastic 2 and the second packaging plastic 4 cover respectively
On the first corresponding collector 11 and the second collector 31, for bonding isolating membrane 5, because isolating membrane
5 contain hole, are even formed more greatly with the contact surface area of the first packaging plastic 2 and the second packaging plastic 4
Be connected convered structure, the bonding force being greatly improved between object, thus improves the package strength of flexible battery；
Use non-solid electrolyte compared to use solid electrolyte, can improve flexible battery kinetics
Energy and energy density, and cost can be reduced；Additionally, also can improve the seriality of the production of flexible battery,
Reduce cost, simplify operation.
In an embodiment of flexible battery according to a first aspect of the present invention, in each receiving space 111
Isolating membrane 5 can be one or more, can be single or multiple lift, can select depending on practical situation.
In an embodiment of flexible battery according to a first aspect of the present invention, referring to figs. 1 through Fig. 3, figure
4, Fig. 5, the first collector 11 is collapsible and forms a receiving space 111, and the second pole piece 3 exists
In quantity it is one.It should be noted that at this, the present invention is to the first collector 11 collapsible and is formed
The quantity of receiving space 111 and the quantity of the second pole piece 3 do not limit, and the first collector 11 is collapsible
And the quantity of the quantity of the receiving space 111 formed and the second pole piece 3 can do adaptability as required and change
Become, such as, in the example shown in Fig. 6, the first collector 11 is collapsible and forms two collecting skies
Between on 111, and the second pole piece 3 quantity be two, in like manner, the first collector 11 is collapsible and is formed
The quantity of receiving space 111 is alternatively more than three, and accordingly, the quantity of the second pole piece 3 is three
Above.Certainly, for flexible battery, it is desirable to the thinnest (through-thickness the most in the drawings of flexible battery
T), then required receiving space 111 quantity formed is the fewest, time the thinnest, uses a receiving space 111.
In an embodiment of flexible battery according to a first aspect of the present invention, the thickness of the first collector 11
Degree can be 20 μm～100 μm.When the thickness of the first collector 11 is less than 20 μm, due to the first afflux
Body 11, containing hole, can make the steam in air enter, cause the final flatulence of flexible battery to lose efficacy.When
When the thickness of the first collector 11 is more than 100 μm, the first collector 11 pliability is not enough and shadow
Ring energy density, be not suitable for for making flexible battery.
In an embodiment of flexible battery according to a first aspect of the present invention, referring to figs. 1 through Fig. 3, figure
4, Fig. 5, the outer surface 113 of the first collector 11 of folding can be used as the first lug.Thus this
The flexible battery of invention need not external first lug, by using the first collector 11 directly to be formed
First lug, can improve energy density, and can according to product need advantageously select the first lug
Position, size, shape, improve the adaptability of product.
In an embodiment of flexible battery according to a first aspect of the present invention, in each receiving space 111
Primary diaphragm 12 is not less than 2mm apart from each edge of the inner surface 112 of corresponding first collector 11.
This distance can be the corresponding width of the first packaging plastic 2, this distance not less than 2mm primarily to give the
One packaging plastic 2 reserves enough spaces, it is ensured that the reliability of encapsulation.
In an embodiment of flexible battery according to a first aspect of the present invention, the first collector 11 can be
One in aluminium foil, Copper Foil, 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
Just can be, the active material in primary diaphragm 12 be in cobalt acid lithium, LiFePO4, ternary system extremely
Few one.Certainly, primary diaphragm 12 may also include other material, such as conductive agent, binding agent etc..
In an embodiment of flexible battery according to a first aspect of the present invention, the first packaging plastic 2 can be third
At least one in olefin(e) acid esters glue, epoxy resin glue, silicone 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
Degree can be 20 μm～100 μm.When the thickness of the second collector 31 is less than 20 μm, due to the second afflux
Body 31, containing hole, can make the steam in air enter, cause the final flatulence of flexible battery to lose efficacy.When
When the thickness of the second collector 31 is more than 100 μm, the pliability of the second collector 31 is not enough and affects
Energy density, is not suitable for for making flexible battery.
In an embodiment of flexible battery according to a first aspect of the present invention, referring to figs. 1 through Fig. 2, figure
4 and Fig. 6, the second collector 31 part can be inserted in a corresponding receiving space 111 so that this second
Collector 31 part (in the drawings, the position of exposed parts is along width W direction) exposes and is used as second
Lug.Thus the flexible battery of this invention need not external second lug, by using the second collector
31 the second lugs directly formed, can improve energy density, and can according to product need advantageously select
Select the position of the second lug, size, shape, improve the adaptability of product.At this it should be noted that
When using the flexible battery shown in Fig. 6, each second collector 31 all has exposed parts, the most permissible
As the second lug, and need between them to be electrically connected.Certainly, in figure 6, each second
The exposed parts of collector 31 can also be arranged along length L direction, consequently facilitating be electrically connected at homonymy
Connect.
In an embodiment of flexible battery according to a first aspect of the present invention, in each receiving space 111
Secondary diaphragm 32 is not less than 2mm apart from each edge of the inner surface 311 of corresponding second collector 31.Should
Distance can be the corresponding width of the second packaging plastic 4, this distance not less than 2mm primarily to give second
Packaging plastic 4 reserves enough spaces, it is ensured that the reliability of encapsulation.
In an embodiment of flexible battery according to a first aspect of the present invention, the second collector 31 can be
One in aluminium foil, Copper Foil, 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 active material of secondary diaphragm 32 be at least one in native graphite, Delanium.When
So, secondary diaphragm 32 may also include other material, such as conductive agent, binding agent etc..
In an embodiment of flexible battery according to a first aspect of the present invention, the second packaging plastic 4 can be third
At least one in olefin(e) acid esters glue, epoxy resin glue, silicone glue, hot melt class glue.
In an embodiment of flexible battery according to a first aspect of the present invention, isolating membrane 5 can be polyolefin
Base material, surface scribble at least one in the polyolefin base material of bonding agent.Compared to prior art, this
Bright isolating membrane 5 does not contains ceramic coating, thus, it is possible to improve isolating membrane 5 and the first packaging plastic 2 and
The reliability that second packaging plastic 4 is bonding.In one embodiment, described bonding agent can be SBR, PVDF
In one.
In an embodiment of flexible battery according to a first aspect of the present invention, non-solid electrolyte can be to contain
There is LiPF6Liquid electrolyte or containing LiPF6Gel electrolyte in one.
In an embodiment of flexible battery according to a first aspect of the present invention, referring to figs. 1 through Fig. 3, figure
4, Fig. 5, Fig. 6, the outline of described flexible battery can form step by W in the width direction.Need at this
Illustrating, the outline of the flexible battery of the present invention is not limited to this, can according to the design of the present invention and
Spirit makes change, forms the special-shaped flexible battery of arbitrary shape.
In an embodiment of flexible battery according to a first aspect of the present invention, with reference to Fig. 4, described flexibility
The outline of battery can be respectively formed step by W and length direction L in the width direction.It should be noted that at this,
The outline of the flexible battery of the present invention is not limited to this, can make more according to the design of the present invention and spirit
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, with reference to Fig. 5, described flexibility
The outline of battery W in the width direction and length direction L is all formed without step.
Next the preparation method of explanation flexible battery according to a second aspect of the present invention.
The preparation method of flexible battery according to a second aspect of the present invention is for preparing according to the present invention first
Flexible battery described in aspect, it includes step: determine the first collector 11 is bent to form collecting sky
Between 111 quantity；The corresponding receiving space 111 that will be formed, in the corresponding inner side of the first collector 11
Primary diaphragm 12 is set on surface 112 off and on, to form the first pole piece 1；The corresponding collecting that will be formed
Space 111, arranges secondary diaphragm 32, with shape on two inner surfacies 311 of each second collector 31
Become the second pole piece 3；Whole first pole pieces 1, whole isolating membrane 5, whole second pole piece 3 are dried
Except water；The corresponding inner surface 112 of the first collector 11 covers around each primary diaphragm 12 and (is coated with
Cover or paste) the first packaging plastic 2；Around each the on the corresponding inner surface 311 of the second collector 31
Two diaphragms 32 cover (coat or paste) second packaging plastic 4；It is compound to be provided with first by isolating membrane 5
Diaphragm 12 and covering on the first collector 11 of the first packaging plastic 2, and carry out hot pressing and become complex；
Make non-solid electrolyte-impregnated primary diaphragm 12, secondary diaphragm 32 and isolating membrane 5；Complex is existed
The number of times corresponding with the quantity of the described receiving space 111 determined is folded at the interval of the first collector 11,
To form the receiving space 111 of described quantification；Secondary diaphragm 32 will be provided with and covered the second envelope
Each second collector 31 correspondence of dress glue 4 is inserted into a receiving space 111, and carries out hot-rolling pressure；With
And be melted into, make flexible battery.Described herein, inner surface 112 and inner surface 311 are equal
For being relative receiving space 111, because the first collector 11 forms at least one receiving space 111,
And the second collector 31 is inserted in a corresponding receiving space 111.
In the preparation method of flexible battery according to a second aspect of the present invention, it is dried except the temperature of water can be
60 DEG C～90 DEG C, it is dried except the time of water can be 4h～12h.Be dried except water temperature and be dried except water time
Between be reciprocal influence factor, when temperature and time is the most too low, except water is insufficient, cause flexible battery
Flatulence lost efficacy；Contraction and diaphragm (i.e. primary diaphragm when temperature and time is the most too high, to isolating membrane 5
12 and secondary diaphragm 32) performance all have an impact.
In the preparation method of flexible battery according to a second aspect of the present invention, it is dried except the humidity of water is not
More than 2%RH.Steam can be avoided to enter in diaphragm (i.e. primary diaphragm 12 and/or secondary diaphragm 32),
Ultimately result in flexible battery flatulence to lose efficacy.
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, hot pressing pressure can be 0.2MPa～1MPa, and hot pressing time can be 1s～10s.Temperature, pressure and
Time is interactional factor, and when temperature, pressure, time are too low, (i.e. temperature is less than 90 DEG C, hot pressing
Pressure is less than 1s less than 0.2MPa, hot pressing time) time, not only the laminating degree at interface is tight, also
The packaging effect that can make packaging area (i.e. first packaging plastic 2 and the second packaging plastic 4) is the best；When temperature,
Pressure, time too high (i.e. temperature is more than 90 DEG C, hot pressing pressure is more than 1MPa, hot pressing time is more than 10s)
Time, isolating membrane 5 easily shrinks, and has the risk of short circuit, and diaphragm (i.e. primary diaphragm 12 and/or the
Two diaphragms 32) granule can come off, affect the performance of capacity.
In the preparation method of flexible battery according to a second aspect of the present invention, the non-solid electrolyte of spraying
Amount can be 0.0020g/mAh～0.0030g/mAh.When the amount of non-solid electrolyte is less than 0.0030g/mAh
Time, make the dynamic performance of flexible battery reduce, it is difficult to give play to enough capacity；When non-solid is electrolysed
When the amount of matter is more than 0.0030g/mAh, too much non-solid electrolyte can destroy between barrier film and diaphragm
Laminating degree, makes 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 be interactional because of
Element, when temperature, hypotony (i.e. temperature less than 70 DEG C, pressure is less than 0.2MPa), not only boundary
The laminating degree in face is not tight, can make packaging area (i.e. first packaging plastic 2 and the second packaging plastic 4) yet
Packaging effect the best；When temperature, hypertonia (i.e. temperature more than 90 DEG C, pressure is more than 1MPa)
Time, isolating membrane 5 easily shrinks, and has the risk of short circuit, and diaphragm (i.e. primary diaphragm 12 and/or the
Two diaphragms 32) granule can come off, affect 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 for being not more than
0.1C.When the electric current of chemical conversion is more than 0.1C, electric current density heterogeneity, can cause this flexible battery to exist
When using the non-solid electrolyte containing lithium, local analysis lithium, also can 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
The method of primary diaphragm 12, secondary diaphragm 32 and isolating membrane 5 can be: at the primary diaphragm of complex
Non-solid electrolyte is sprayed on the isolating membrane 5 of 12 correspondences or secondary diaphragm 32.It should be noted that at this,
Described non-solid electrolyte need to be avoided being sprayed onto on the first packaging plastic 2 and the second packaging plastic 4.
The flexible battery of the present invention can apply on watchband, ornament, wearable dress ornament, easy to carry,
Merrily and lightheartedly.
Next the embodiment of preparation method of flexible battery according to the present invention, comparative example, test are described
Process and test result.
Embodiment 1
The quantity being bent to form receiving space 111 determining the first collector 11 is 1；
Interval on the corresponding inner surface 112 of the first collector 11 (Copper Foil) that thickness is 20 μm
Ground coating arranges primary diaphragm 12 (active material is native graphite) at two, to form the first pole piece 1；
On two inner surfacies 311 of the second collector 31 (aluminium foil) that thickness is 20 μm, coating is arranged
Secondary diaphragm 32 (active material is cobalt acid lithium), to form the second pole piece 3；
First pole piece 1, isolating membrane 5 (polyolefin base material), the second pole piece 3 are dried except water,
It is dried except the temperature of water is 60 DEG C, is dried except the time of water is 4h, is dried except the humidity of water is 2%RH；
The corresponding inner surface 112 of the first collector 11 coats first around each primary diaphragm 12
Packaging plastic 2 (epoxy resin glue)；
The corresponding inner surface 311 of the second collector 31 coats the second envelope around each secondary diaphragm 32
Dress glue 4 (epoxy resin glue)；
It is compound to isolating membrane 5 to coat and is provided with primary diaphragm 12 and covers the of the first packaging plastic 2
On one collector 11, and carrying out hot pressing and become complex, hot pressing temperature is 70 DEG C, hot pressing pressure is
0.2MPa, hot pressing time are 1s；
Primary diaphragm 12 region spraying corresponding on isolating membrane 5 is containing LiPF6Liquid electrolyte, electricity
The amount solving liquid is 0.0020g/mAh, so that electrolyte dipping primary diaphragm 12 and isolating membrane 5；
Complex is folded once at the interval of the first collector 11, to form described quantification
Receiving space 111；
Coating is provided with secondary diaphragm 32 and covers the second collector 31 correspondence of the second packaging plastic 4
Being inserted into this receiving space 111, and carry out hot-rolling pressure, the temperature of hot-rolling pressure is 70 DEG C, the pressure of hot-rolling pressure
Power is 0.2MPa；And
The electric current using 0.1C is melted into, and makes flexible battery.
Embodiment 2
The quantity being bent to form receiving space 111 determining the first collector 11 is 1；
Corresponding inner surface 112 at the first collector 11 (stainless steel foil) that thickness is 100 μm
On off and on coating primary diaphragm 12 (active material is Delanium) at two is set, to form the first pole
Sheet 1；
Two inner surfacies 311 of the second collector 31 (aluminium foil) that thickness is 100 μm are coated with and cover
Put secondary diaphragm 32 (active material is LiFePO4), to form the second pole piece 3；
By the first pole piece 1, the isolating membrane 5 polyolefin base material of PVDF bonding agent (surface scribble),
Two pole pieces 3 are dried except water, be dried except the temperature of water be 90 DEG C, be dried except the time of water be 12h,
It is dried except the humidity of water is 0.5%RH；
The corresponding inner surface 112 of the first collector 11 coats first around each primary diaphragm 12
Packaging plastic 2 (esters of acrylic acid glue)；
The corresponding inner surface 311 of the second collector 31 coats the second envelope around each secondary diaphragm 32
Dress glue 4 (esters of acrylic acid glue)；
It is compound to isolating membrane 5 to coat and is provided with primary diaphragm 12 and covers the of the first packaging plastic 2
On one collector 11, and carrying out hot pressing and become complex, hot pressing temperature is 90 DEG C, hot pressing pressure is
1MPa, hot pressing time are 10s；
Primary diaphragm 12 region spraying corresponding on isolating membrane 5 is containing LiPF6Gel state electrolyte,
The amount of electrolyte is 0.0030g/mAh so that electrolyte dipping primary diaphragm 12, secondary diaphragm 32 with
And isolating membrane 5；
Complex is folded once at the interval of the first collector 11, to form described quantification
Receiving space 111；
Coating is provided with secondary diaphragm 32 and covers the second collector 31 correspondence of the second packaging plastic 4
Being inserted into this receiving space 111, and carry out hot-rolling pressure, the temperature of hot-rolling pressure is 90 DEG C, the pressure of hot-rolling pressure
Power is 1MPa；And
The electric current using 0.01C is melted into, and makes flexible battery.
Embodiment 3
The quantity being bent to form receiving space 111 determining the first collector 11 is 1；
Interval on the corresponding inner surface 112 of the first collector 11 (aluminium foil) that thickness is 60 μm
Ground coating arranges primary diaphragm 12 (active material is ternary material) at two, to form the first pole piece 1；
On two inner surfacies 311 of the second collector 31 (Copper Foil) that thickness is 60 μm, coating is arranged
Secondary diaphragm 32 (active material is Delanium), to form the second pole piece 3；
By the first pole piece 1, the isolating membrane 5 polyolefin base material of SBR bonding agent (surface scribble), second
Pole piece 3 is dried except water, is dried except the temperature of water is 75 DEG C, is dried except the time of water is 8h, does
The dry humidity except water is 1%RH；
The corresponding inner surface 112 of the first collector 11 coats first around each primary diaphragm 12
Packaging plastic 2 (silicone glue)；
The corresponding inner surface 311 of the second collector 31 coats the second envelope around each secondary diaphragm 32
Dress glue 4 (silicone glue)；
It is compound to isolating membrane 5 to coat and is provided with primary diaphragm 12 and covers the of the first packaging plastic 2
On two collectors 31, and carrying out hot pressing and become complex, hot pressing temperature is 80 DEG C, hot pressing pressure is
0.6MPa, hot pressing time are 6s；
In the spraying of secondary diaphragm 32 region containing LiPF6Gel state electrolyte, the amount of electrolyte is
0.0025g/mAh, so that electrolyte dipping primary diaphragm 12, secondary diaphragm 32 and isolating membrane 5；
Complex is folded once at the interval of the first collector 11, to form described quantification
Receiving space 111；
Coating is provided with secondary diaphragm 32 and covers the second collector 31 correspondence of the second packaging plastic 4
Being inserted into this receiving space 111, and carry out hot-rolling pressure, the temperature of hot-rolling pressure is 80 DEG C, the pressure of hot-rolling pressure
Power is 0.6MPa；And
The electric current using 0.05C is melted into, and makes flexible battery.
Comparative example 1
In addition to the polyolefin base material that isolating membrane 5 uses surface to contain ceramic coating, remaining and embodiment 1
Identical.
Test process
The flexible battery of embodiment 1～3 being numbered, number consecutively is S1～S3, soft by comparative example 1
Property battery numbering, numbered D1.S1～S3 and D1 is carried out capacity and encapsulation performance test.
Capacity test method is: first flexible battery group is stood 3min；Then with the charged electrical of 0.5C
Stream constant-current charge is to 4.3V, then constant-voltage charge is to 0.05C, obtains charging capacity AGC0；Stand 3min；
Again with the discharge current constant-current discharge of 0.5C to 3.0V, obtain discharge capacity D0 first；Stand 3min
Complete volume test afterwards.
Packaging and testing method is: stored 7 days by flexible battery constant temperature at 85 DEG C.Finally observe flexibility
Whether battery has leakage and the phenomenon ruptured, and tests the adhesive strength at the seal after storage.
Table 1 volume test and the test result of packaging and testing
As it can be seen from table 1 the capacity of S1～S3 is completely or almost completely played, and flexible electrical
Pond does not has leakage and situation about rupturing to occur after storage, and the adhesive strength at seal is the best.
Illustrate to use the preparation method of the flexible battery of the present invention, the flexible electrical that encapsulation performance is good can be made
Pond, the package strength of raising flexible battery.And the preparation method of the flexible battery of the present invention is very suitable for
Actual production operates.
Although the capacity of D1 is played the most completely, but capacity plays poor compared with Example 1
A bit, and D1 there occurs leakage, and ceramic coating is contained on predominantly isolating membrane surface, and ceramic coating is described
It is difficult to and the first packaging plastic and the second packaging plastic (epoxy resin glue) form Van der Waals force or effective
Chemical bond, thus cause the inefficacy of encapsulation.
Claims (10)
1. a flexible battery, it is characterised in that including:
First pole piece (1), including:
First collector (11), folds and is formed at least one receiving space (111)；And
Primary diaphragm (12), is arranged on each receiving space of the formation (111) of the first collector (11)
Relative two inner surface (112) on；
First packaging plastic (2), around corresponding primary diaphragm (12) and cover in the first collector (11)
Inner surface (112) on；
Second pole piece (3) is contrary with the first pole piece (1) electric polarity, with receiving space (111) in quantity
Quantity is corresponding, and each second pole piece (3) including:
Second collector (31), is inserted in a corresponding receiving space (111)；And
Secondary diaphragm (32), is arranged on (31) two inner surfacies (311) of the second collector；
Second packaging plastic (4), around corresponding secondary diaphragm (32) and cover at the second corresponding collection
On the inner surface (311) of fluid (31)；And
Isolating membrane (5), is inserted in each receiving space (111), and by each receiving space (111)
The first pole piece (1) and the second pole piece (3) separate, and the isolation that each receiving space (111) is corresponding
The first packaging plastic (2) and the second packaging plastic (4) that film (5) is corresponding with this receiving space (111) glue
Connect；
Non-solid electrolyte, is used for impregnating primary diaphragm (12), secondary diaphragm (32) and isolating membrane
(5)。
Flexible battery the most according to claim 1, it is characterised in that the first collector (11) is rolled over
Fold and form a receiving space (111), and the second pole piece (3) is quantitatively one.
Flexible battery the most according to claim 1, it is characterised in that first collector (11) of folding
Outer surface (113) be used as the first lug.
Flexible battery the most according to claim 1, it is characterised in that in each receiving space (111)
Primary diaphragm (12) apart from each edge of the inner surface (112) of corresponding first collector (11)
Not less than 2mm.
Flexible battery the most according to claim 1, it is characterised in that the second collector (31) portion
Divide and insert in a corresponding receiving space (111) so that this second collector (31) part exposes and uses
Make the second lug.
Flexible battery the most according to claim 1, it is characterised in that in each receiving space (111)
Secondary diaphragm (32) apart from each edge of the inner surface (311) of corresponding second collector (31) not
Less than 2mm.
Flexible battery the most according to claim 1, it is characterised in that isolating membrane (5) is polyolefin
Base material, surface scribble at least one in the polyolefin base material of bonding agent.
Flexible battery the most according to claim 1, it is characterised in that the foreign steamer of described flexible battery
Exterior feature (W) in the width direction forms step.
Flexible battery the most according to claim 1, it is characterised in that the foreign steamer of described flexible battery
Exterior feature (W) in the width direction and length direction (L) are respectively formed step.
10. a preparation method for flexible battery, for preparation according to according to any one of claim 1～9
Flexible battery, it is characterised in that include step:
Determine the quantity being bent to form receiving space (111) of the first collector (11)；
The corresponding receiving space (111) that will be formed, at the corresponding inner side table of the first collector (11)
Primary diaphragm (12) is set on face (112) off and on, to form the first pole piece (1)；
The corresponding receiving space (111) that will be formed, at two inner surfacies of each second collector (31)
(311) secondary diaphragm (32) is set on, to form the second pole piece (3)；
Whole first pole pieces (1), whole isolating membrane (5), whole second pole piece (3) are done
Dry except water；
Around each primary diaphragm (12) on the corresponding inner surface (112) of the first collector (11)
Cover the first packaging plastic (2)；
Around each secondary diaphragm (32) on the corresponding inner surface (311) of the second collector (31)
Cover the second packaging plastic (4)；
It is compound to isolating membrane (5) be provided with primary diaphragm (12) and covered the first packaging plastic (2)
The first collector (11) on, and carry out hot pressing and become complex；
Make non-solid electrolyte-impregnated primary diaphragm (12) and isolating membrane (5)；
Complex is folded at the interval of the first collector (11) and the described receiving space (111) determined
Number of times corresponding to quantity, to form the receiving space (111) of described quantification；
Secondary diaphragm (32) will be provided with and cover each second collector (31) of the second packaging plastic (4)
Correspondence is inserted into a receiving space (111), and carries out hot-rolling pressure；And
It is melted into, makes flexible battery.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510183721.5A CN106159315B (en) | 2015-04-17 | 2015-04-17 | Flexible battery and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510183721.5A CN106159315B (en) | 2015-04-17 | 2015-04-17 | Flexible battery and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108695545A (en) * | 2017-04-10 | 2018-10-23 | 纳米及先进材料研发院有限公司 | Flexible foldable lithium ion battery |
| 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 |
| CN113632283A (en) * | 2020-09-30 | 2021-11-09 | 宁德新能源科技有限公司 | Liquid battery and electronic device with same |
| 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 |
| CN116544523A (en) * | 2023-07-04 | 2023-08-04 | 宁德新能源科技有限公司 | Electrochemical device and power consumption terminal |
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| 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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| US6461762B1 (en) * | 2000-04-20 | 2002-10-08 | Industrial Technology Research Institute | Rechargeable battery structure having a stacked structure of sequentially folded cells |
| JP2005174653A (en) * | 2003-12-09 | 2005-06-30 | Sanyo Electric Co Ltd | Lithium secondary battery and manufacturing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108695545A (en) * | 2017-04-10 | 2018-10-23 | 纳米及先进材料研发院有限公司 | Flexible foldable lithium ion battery |
| CN113632283A (en) * | 2020-09-30 | 2021-11-09 | 宁德新能源科技有限公司 | Liquid battery and electronic device with same |
| CN113632283B (en) * | 2020-09-30 | 2024-05-17 | 宁德新能源科技有限公司 | Liquid battery and electronic device with 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 |
| CN116544523A (en) * | 2023-07-04 | 2023-08-04 | 宁德新能源科技有限公司 | Electrochemical device and power consumption terminal |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106159315B (en) | 2018-12-04 |
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