CN206628549U - Flexible lithium ion battery and electronic product - Google Patents
Flexible lithium ion battery and electronic product Download PDFInfo
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- CN206628549U CN206628549U CN201720372215.5U CN201720372215U CN206628549U CN 206628549 U CN206628549 U CN 206628549U CN 201720372215 U CN201720372215 U CN 201720372215U CN 206628549 U CN206628549 U CN 206628549U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model discloses a kind of flexible lithium ion battery and electronic product.The utility model flexible lithium ion battery includes flexible shell, positive pole, negative pole and the barrier film being laminated between the positive pole and negative pole, wherein, positive pole includes plus plate current-collecting body and segmentation applies some sections of positive electrode material layers for being located at plus plate current-collecting body surface；Negative pole includes negative current collector and segmentation applies some sections of negative electrode material layers for being located at negative current collector surface；And some sections of positive electrode material layers contained by positive pole correspond with some sections of negative electrode material layers contained by negative pole, some sections of positive electrode material layers contained by positive pole form some battery cells connected by the sealing section with some sections of negative electrode material layers contained by the negative pole and flexible shell, and the electrolyte is filled in the battery cell.The utility model flexible lithium ion battery can fold at sealing section, have excellent flexibility, and cell thickness is thin.
Description
Technical field
The utility model belongs to cell art, relates particularly to a kind of flexible lithium ion battery and electronic product.
Background technology
With the development of science and technology all kinds of miniaturization of electronic products trend are increasingly bright while electronic product extreme enrichment
It is aobvious.It is such as electric to the critical component in electronic product particularly in fields such as wearable device, medicine equipment, precision instrumentations
Road plate, battery etc. propose higher requirement.
Such as the prevalence with Intelligent worn device, more and more people select Intelligent worn device, but intelligence wearing is set
Standby the defects of structure to be present, wearable device can not install battery in actuated position, cause Intelligent worn device integral battery door
Energy is relatively low.Existing Intelligent worn device is because majority is to be bonded human design, it is necessary to bending anyway, but existing lithium
Ion secondary battery is not bent repeatedly, so as to particularly intelligently be worn because the limitation of battery seriously constrains flexible electronic product
Wear the development of equipment.
Utility model content
The purpose of this utility model is the above-mentioned deficiency for overcoming prior art, there is provided a kind of flexible thin-film battery, with solution
The deficiency that certainly existing lithium rechargeable battery is not bent repeatedly.
Another object of the present utility model is to provide a kind of electronic product, makes battery not anti-to solve existing electronic product
Bend again and restrict the deficiency of electronics applications.
In order to realize above-mentioned purpose of utility model, one side of the present utility model, there is provided a kind of flexible lithium ion battery.
The flexible lithium ion battery includes flexible shell, the battery core in the housing and electrolyte, and the battery core is by positive pole, negative
Pole and the barrier film being laminated between the positive pole and negative pole are formed；Wherein,
The positive pole includes plus plate current-collecting body and applies the positive electrode material layer for being located at the plus plate current-collecting body surface, the positive pole
Material layer is made up of some sections of positive electrode material layers, has interval section between adjacent two sections of positive electrode material layers；
The negative pole includes negative current collector and applies the negative electrode material layer for being located at the negative current collector surface, the negative pole
Material layer is made up of some sections of negative electrode material layers, has interval section between adjacent two sections of negative electrode material layers；
And some sections of positive electrode material layers contained by the positive pole and some sections of negative electrode material layers contained by the negative pole are one by one
Corresponding, the interval section contained by the positive pole corresponds with the interval section contained by the negative pole；Between contained by the positive pole
Interval section and barrier film and flexible shell between septal area, contained by the negative pole form sealing section, if contained by the positive pole
Dry section positive electrode material layer is formed by the sealing section with some sections of negative electrode material layers contained by the negative pole and flexible shell
Some battery cells of series connection, the electrolyte are filled in the battery cell.
Preferably, the interval section between adjacent two sections of positive electrode material layers contained by the positive pole and negative pole institute
The interval section width between the adjacent two sections of negative electrode material layers contained is 2-6mm.
Preferably, each section of positive electrode material layer contained by the positive pole and each section of negative electrode material layer contained by the negative pole
Length be 8-12mm.
Preferably, the thickness of the positive electrode material layer of the plus plate current-collecting body one side is 55-120 μm.
Preferably, the thickness of the negative electrode material layer of the negative current collector one side is 60-140 μm.
Preferably, the thickness of the barrier film is 9~20 μm.
Specifically, the barrier film is gelatin membrane.
A kind of another aspect of the present utility model, there is provided electronic product.The electronic product is soft with the utility model
Property the flexible lithium ion battery for preparing of lithium ion battery preparation method described in the utility model as power supply.
Compared with prior art, the utility model flexible lithium ion battery is due to containing as the interval section contained by both positive and negative polarity
Sealing section is formed with barrier film and housing, and sealing section series connection is as some sections of positive electrode material layers contained by positive pole and institute
State some sections of negative electrode material layers contained by negative pole and housing forms battery cell, because sealing section does not have electrode material, because
This, the utility model flexible lithium ion battery can fold at sealing section, assign the utility model flexible lithium ion battery
Excellent flexibility that can be folding.Also solve existing flexible lithium ion battery battery pole piece during bending simultaneously easily to fall
The problem of powder, so as to ensure the security performance of the utility model flexible lithium ion battery and cycle performance.In addition, the utility model
Flexible lithium ion battery battery core is that both positive and negative polarity directly is carried out into lamination process, without the core of such as existing lithium ion battery cell
Processing, therefore, the utility model flexible lithium ion battery thickness of thin.
Positive electrode material layer segmentation painting contained by positive pole is located at positive collection by the utility model flexible lithium ion battery preparation method
On fluid, the negative electrode material layer segmentation painting contained by negative pole is located on negative collector, by positive pole and negative pole according to each section of anode electrode
Material layer is corresponded with each section of negative electrode material layer and set, and battery cell is formed after encapsulated；And by contained by both positive and negative polarity
Interval section also corresponds setting, and sealing section is formed after encapsulated, because sealing section does not have electrode material, therefore, envelope
Filling the battery formed can fold at sealing section, assign cell flexible, its thickness of thin.
The utility model electronic product is due to therefore, being carried as power supply using the utility model flexible lithium ion battery
High electronic product bending characteristic, and ensure that the stability of electronic product power source power supply.
Brief description of the drawings
Fig. 1 is the structural representation of battery core contained by the utility model embodiment flexible lithium ion battery；
Fig. 2 is the front view of positive pole contained by the utility model embodiment flexible lithium ion battery；
Fig. 3 is the front view of the structure of positive pole one contained by the utility model embodiment flexible lithium ion battery；
Fig. 4 is the front view of another structure of positive pole contained by the utility model embodiment flexible lithium ion battery；
Fig. 5 is the flexible shell of the utility model embodiment flexible lithium ion battery and the structural representation after battery core encapsulation
Figure；
Fig. 6 is the encapsulation clamp structure schematic diagram for secondary encapsulation the utility model embodiment flexible lithium ion battery；
Fig. 7 is the utility model embodiment flexible lithium ion battery structural representation.
Embodiment
In order that the technical problems to be solved in the utility model, technical scheme and beneficial effect are more clearly understood, below
In conjunction with the embodiments, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only
To explain the utility model, it is not used to limit the utility model.
On the one hand, the utility model embodiment provides a kind of flexible lithium ion battery.The flexible lithium ion battery knot
For structure as shown in Fig. 1 to 5, it includes flexible shell 01, the battery core 02 in the housing and electrolyte 03.
Wherein, the flexible shell 01 contained by above-mentioned flexible lithium ion battery can be the conventional housing of flexible lithium ion battery
Material, such as select but not just for aluminum plastic film.
Electrolyte 03 contained by above-mentioned flexible lithium ion battery can also be the conventional electrolyte of lithium ion battery, for upper
For stating flexible lithium ion battery, electrolyte 03 is not required particularly.
The structure of battery core 02 contained by above-mentioned flexible lithium ion battery as shown in figure 1, it include positive pole 1 and negative pole 2 and
The barrier film 3 being laminated between the positive pole 1 and negative pole 2.
Wherein, as Figure 1-4, it includes plus plate current-collecting body 11 to the above-mentioned structure of positive pole 1 and segmentation painting is located at anode collection
Some sections of positive electrode material layers 12 on the surface of body 11, and there is interval section between adjacent two sections of positive electrode material layers 12.In other words,
Positive electrode material layer 12 contained by above-mentioned positive pole 1 is made up of some sections of positive electrode material layers, it is specific such as positive electrode material layer 121, just
Pole material layer 122, positive electrode material layer 123,, positive electrode material layer 12n (n >=2) composition；Have between adjacent two segment electrodes material layer
Have interval, it is specific as interval 111, interval 112, interval 113,, 11 (n-1) of interval.So, some sections of positive electrode material layers 12
Collector 11 is divided into some sections, is particularly coated with the electrode material layer section of some sections of positive electrode material layers 12, such as just
Pole material layer section 111 ', positive electrode material layer section 112 ', positive electrode material layer section 113 ',, positive electrode material layer section 11n ',
With the interval section in adjacent electrode material layer section, as interval section 111, interval section 112, interval section 113,, spacer region
Between 11 (n-1).
In the above-mentioned embodiment of positive pole 1, as an embodiment of the present utility model, adjacent two sections of positive electrode material layers 12
Between the interval width be 2~6mm.The interval width can assign the battery containing the above-mentioned positive pole can be at the interval
Bent at section, assign above-mentioned flexible lithium ion battery good flexibility.Certainly, the interval width can also be more than 0 and be less than 2,
Such interval is due to smaller, after being assembled into battery core 02 and above-mentioned flexible lithium ion battery, due to the seal area of electrodeless material
Between 04 spacing it is smaller, the amplitude that above-mentioned flexible lithium ion battery can be allowd to bend is relatively small.Certainly, the interval width
6 can be more than, such interval is due to larger, in the case that positive and negative afflux body length is certain, is assembled into battery core 02 and above-mentioned
After flexible lithium ion battery, because the spacing of sealing section 04 of electrodeless material is larger, although can cause above-mentioned flexible lithium from
The amplitude that sub- battery can be bent is relatively large, but can due to assembling the quantity of battery cell 05 containing electrode material layer compared with
It is small so that above-mentioned flexible lithium ion battery energy density is smaller.Therefore, can be answered according to the above-mentioned flexible lithium ion battery of reality
With needs, the interval width being adjusted between adjacent two segment electrodes material layer so that the battery core 02 of assembling and above-mentioned soft
Property the existing rational bending amplitude of lithium ion battery have high energy density again.
In another embodiment, the width of each segment electrode material layer is 8- in some sections of positive electrode material layers 12
12mm, the thickness of the positive electrode material layer 12 are that can be wanted according to the capacity and thickness of above-mentioned flexible lithium ion battery practical application
Ask and be adjusted, if the thickness of the positive electrode material layer 12 of the one side of plus plate current-collecting body 11 is 55-120 μm.By to each section of positive pole
The width and thickness of material layer are controlled, and assign above-mentioned flexible lithium ion battery good chemical property, and such as stable follows
Ring performance and high-energy-density.
In one embodiment, the plus plate current-collecting body 11 contained by above-mentioned positive pole 1 can be the conventional positive pole of lithium ion cell positive
Collector, such as can be aluminium foil, naturally it is also possible to be other conventional positive current collector materials.
Positive electrode material layer 12 contained by above-mentioned positive pole 1 includes positive electrode active materials, conductive agent, positive electrode binder.The positive pole
Active material, conductive agent, the ratio of positive electrode binder content can be the ratios in traditional lithium-ion battery positive-active layer.Its
In, the positive electrode active materials can be with but not just for cobalt acid lithium (such as LC800D), tertiary cathode material (such as PC10), ferric phosphate
At least one of lithium (such as XC-116), LiMn2O4 (such as LMO-HB), the positive electrode binder are PVDF (such as HSV-900), third
At least one of olefin(e) acid ester (such as LA133), the conductive agent are in CNT (CNT-S), conductive carbon black (Super-p)
It is at least one.
In addition, a kind of structure of positive pole 1 shown in Fig. 2 to 4 only above-mentioned positive pole 1, the positive electrode material layer 12 are preferred
Be to be coated with positive electrode material layer 12 on two relative surfaces of plus plate current-collecting body 11 to form above-mentioned positive pole 1.On two surfaces
In the positive electrode material layer 12 being coated with, positive pole material that positive electrode material layer 12 that the one side of plus plate current-collecting body 11 is coated with is coated with another surface
The positions and dimensions that each section of the bed of material 12 are one-to-one, then the simultaneously interval between adjacent two sections of positive electrode material layers 12
The positions and dimensions of interval section between the two sections of positive electrode material layers 12 adjacent with another surface of section are also one-to-one.
The above-mentioned structure of negative pole 2 is enough identical with the positive pole 1 shown in Fig. 2-4, and it includes negative current collector 21 and segmentation painting is located at
Some sections of negative electrode material layers 22 on the surface of negative current collector 21, and there is interval section between adjacent two sections of negative electrode material layers 22.
In other words, the negative electrode material layer 22 contained by above-mentioned negative pole 2 is by some sections of negative electrode material layer 22n (n >=2), adjacent two sections of electricity
There is interval between pole material layer 22.So, negative current collector 21 is divided into some sections by some sections of negative electrode material layers 22, specifically
Be the electrode material layer section and adjacent electrode material layer section that are coated with some sections of negative electrode material layers 22 interval section.
In the above-mentioned embodiment of negative pole 2, as an embodiment of the present utility model, adjacent two sections of negative electrode material layers 22
Between the interval width be such as 2-6mm, preferably 3-6mm.The interval width can assign containing the above-mentioned flexible lithium from
Sub- battery can be bent in the interval, assign above-mentioned flexible lithium ion battery good flexibility.As above-mentioned positive pole 1 is identical,
The interval width size between adjacent two sections of negative electrode material layers 22 contained by the negative pole 2 influences above-mentioned flexible lithium ion battery
Bending amplitude size and energy density, can coordinate interval width contained by positive pole 1 and according to reality battery applications needs, enter
Row adjusts the interval width between adjacent two sections of negative electrode material layers 22 so that the battery core 02 of assembling and above-mentioned flexible lithium ion
The existing rational bending amplitude of battery has high energy density again.
In another embodiment, the width of each segment electrode material layer is 8- in some sections of negative electrode material layers 22
12mm, in a further embodiment, the thickness of the negative electrode material layer 22 is can be actual according to above-mentioned flexible lithium ion battery
The capacity and thickness requirement of application are adjusted, if the thickness of the negative electrode material layer 22 of the one side of negative current collector 21 is 60-140 μ
m.It is controlled by the width to each section of negative electrode material layer and thickness, assigns above-mentioned flexible lithium ion battery good electrification
Learn performance, such as stable cycle performance and high-energy-density.
In one embodiment, the negative current collector 21 contained by above-mentioned negative pole 2 can be the conventional negative pole of negative electrode of lithium ion battery
Collector, such as can be copper foil, naturally it is also possible to be other conventional negative current collector materials.
Negative electrode material layer 22 contained by above-mentioned negative pole 2 includes negative active core-shell material, conductive agent, negative electrode binder.The negative pole
Active material, conductive agent, the ratio of negative electrode binder content can be the ratios in traditional lithium-ion battery negative electrode active layer.Its
In, the negative active core-shell material can be with but not just for Delanium (HSG), native graphite (such as AMU-1), lithium titanate (such as YL-
T104 at least one of), the negative electrode binder be but not just for butadiene-styrene latex (such as SD-6156), acrylate (such as
LA133), at least one of sodium carboxymethylcellulose (such as CRT3000PA), the conductive agent but not just for for CNT
(CNT-S), at least one of conductive carbon black (Super-p).
In addition, the negative electrode material layer 22 contained by above-mentioned negative pole 2 is preferably on two relative surfaces of negative current collector 21
On be coated with negative electrode material layer 22 and form above-mentioned negative pole 2.In the negative electrode material layer 22 being coated with two surfaces, negative current collector 21
The positions and dimensions for each section of the negative electrode material layer 22 that the negative electrode material layer 22 being simultaneously coated with is coated with another surface are one by one
It is corresponding, then simultaneously interval section two sections of negative electrode material layers adjacent with another surface between adjacent two sections of negative electrode material layers 22
The positions and dimensions of interval section between 22 are also one-to-one.
So, after the positive pole 1 of said structure and negative pole 2 are formed into battery core 02 with the stacking of barrier film 3, if contained by positive pole 1
Dry section positive electrode material layer 12 corresponds with some sections of negative electrode material layers 22 contained by negative pole 2 to be set, now, some sections of positive pole materials
22 adjacent two sections of negative electrode material layers of interval region and some sections of negative electrode material layers between 12 adjacent two sections of positive electrode material layers of the bed of material
Between interval region also correspond setting, barrier film 3 is layered between adjacent positive 1 and negative pole 2, stacking form battery core 02
Structure is as shown in Figure 1.
On the basis of each embodiment of above-mentioned battery core 02, the battery core 02 in the various embodiments described above can be following structure：
The first, including a piece of positive pole 1 and a piece of negative pole 2, by being laminated the barrier film 3 combined between the positive pole 1 and negative pole 2
Separate.And some sections of positive electrode material layers 12 contained by positive pole 1 are corresponded with some sections of negative electrode material layers 22 contained by negative pole 2 and set
Put, now, interval region and some sections of negative electrode material layers between 12 adjacent two sections of positive electrode material layers of some sections of positive electrode material layers
Interval region between 22 adjacent two sections of negative electrode material layers also corresponds setting.
Second, including at least a piece of positive pole 1 and at least two panels negative pole 2, and positive pole 1, negative pole 2 are alternately laminated, per adjacent
Separated between positive pole 1 and negative pole 2 by being laminated the barrier film 3 combined.And some sections of positive electrode material layers 12 and negative pole contained by positive pole 1
Some sections of negative electrode material layers 22 contained by 2, which correspond, to be set, now, 12 adjacent two sections of positive electrodes of some sections of positive electrode material layers
Interval region also one a pair between 22 adjacent two sections of negative electrode material layers of interval region and some sections of negative electrode material layers between layer
It should set.
The third, including at least two panels positive pole 1 and at least a piece of negative pole 2, and positive pole 1, negative pole 2 are alternately laminated, per adjacent
Separated between positive pole 1 and negative pole 2 by being laminated the barrier film 3 combined.And some sections of positive electrode material layers 12 and negative pole contained by positive pole 1
Some sections of negative electrode material layers 22 contained by 2, which correspond, to be set, now, 12 adjacent two sections of positive electrodes of some sections of positive electrode material layers
Interval region also one a pair between 22 adjacent two sections of negative electrode material layers of interval region and some sections of negative electrode material layers between layer
It should set.
The barrier film that the barrier film 3 in battery core 02 in the various embodiments described above can be commonly used with lithium ion battery, the thickness of the barrier film 3
Degree can be, but not limited to as 9~20 μm, and barrier film 3 is preferably high-molecular gel barrier film, so, when battery core is in encapsulation, Ke Yizhi
Connect to the interval region and some sections of phases of negative electrode material layer 22 between 12 adjacent two sections of positive electrode material layers of some sections of positive electrode material layers
The direct hot pressing of interval region between adjacent two sections of negative electrode material layers, sealing section 04 is formed together with flexible shell 01, now,
Correspond to set and electricity is formed to some sections of positive electrode material layers 12 and some sections of negative electrode material layers 22 and barrier film 3 and flexible shell 01
Pond monomer 05, and electrolyte 03 is filled in each battery cell 05., can be in barrier film 3 when barrier film 3 is other non-gelatin membranes
It is coated with surface at interval region such as PUR tack coat, adhesive effect is played in encapsulation, so as to forms sealing section 04.This
Sample, if encapsulating the above-mentioned flexible lithium ion battery structure of formation as shown in fig. 7, being the dry cell connected by the sealing section 04
Monomer 05 is formed.Due to not having electrode material between seal area 04, therefore, above-mentioned flexible lithium ion battery can be in sealing section 04
Place folds, and assigning above-mentioned flexible lithium ion battery can be by folding excellent flexibility.So as to efficiently solve existing lithium from
Sub- battery is the easy dry linting of battery pole piece during bending the problem of, so as to ensure the security performance of above-mentioned flexible lithium ion battery
And cycle performance.In addition, above-mentioned lithium ion battery cell is that both positive and negative polarity directly is carried out into lamination process, without such as existing lithium from
The core processing of sub- battery battery core, therefore, the utility model flexible lithium ion battery thickness of thin.
Such as by controlling above-mentioned positive pole 1 and the thickness of negative pole 2 and barrier film 3, such as one layer of thickness of positive pole 1 is arranged to
0.120mm, two layers of the thickness of negative pole 2 are 0.25mm, and the thickness of three-layer membrane 3 is 0.075mm, and two layers of plastic-aluminum film thickness is 0.226, most
0.7mm can be accomplished by ensureing that above-mentioned flexible lithium ion battery is most thin eventually.
Correspondingly, on the basis of flexible lithium ion battery described above, the utility model embodiment additionally provides
A kind of preparation method of literary flexible lithium ion battery.With reference to Fig. 1-5, the preparation method comprises the following steps：
Step S1：Positive electrode material layer 12 is coated with the surface segment of anode collection 11, and causes the positive electrode material layer 12 to be
It is made up of some sections of positive electrode material layers, there is interval section between adjacent two sections of positive electrode material layers；
Step S2：Negative electrode material layer 22 is coated with the surface segment of negative current collector 21, and causes the negative electrode material layer 22
It is made up of some sections of negative electrode material layers, there is interval section between adjacent two sections of negative electrode material layers；
Step S3：Folded be incorporated between the positive pole 1 and the negative pole 2 of membrane layer 3 is formed into battery core 02, and causes positive pole
Some sections of positive electrode material layers 12 contained by 1 correspond with some sections of negative electrode material layers 22 contained by the negative pole 2, the positive pole
Interval section contained by 1 corresponds with the interval section contained by the negative pole 2；
Step S4：The battery core 02 is placed in encapsulation process in flexible shell 01, and injects electrolyte 03 and ripening
Secondary encapsulation processing is carried out afterwards.
Specifically, in above-mentioned steps S1, between plus plate current-collecting body 11, positive electrode material layer 12 and adjacent two sections of positive electrode material layers
With interval section etc. such as positive pole 1 in flexible lithium ion battery above.In above-mentioned steps S2, negative current collector 21, negative pole
Have interval section etc. also as born in flexible lithium ion battery above between material layer 22 and adjacent two sections of negative electrode material layers
Pole 2.In order to save length, will not be repeated here.Wherein, being coated with the method for positive electrode material layer 12 and negative electrode material layer 22 can be
The slurry of positive electrode material layer 12 and the slurry of negative electrode material layer 22 are set to afflux using the corresponding painting such as spraying process or transfer coated method
Body surface face.Wait after being coated with, can be rolled after follow-up two pairs of rollers to PROCESS FOR TREATMENT positive electrodes such as process thickness, film-makings
Layer 12 and negative electrode material layer 22, so as to form positive pole 1 and negative pole 2.In addition, above-mentioned steps S1 and step S2 is not successively suitable
Sequence.
In addition, the above-mentioned positive pole 1 and the method for negative pole 2 of preparing can also directly be coated with big plate electrode material on large stretch of collector
The bed of material, film-making then is carried out to big plate electrode and forms positive pole 1 and negative pole 2.Specific film-making can be conventional tablet making technology, such as adopt
Entire volume can be used to be divided into the technique of rouleau pole piece with separating and cutting process, one piece of pole piece can also be washed into using sheet-punching machine, can also be adopted
With die-cutting machine, pole piece is cut into the mechanism of multi pole ears, as shown in Figures 2 and 3.
In above-mentioned steps S3, the core strueture in the structure of battery core 02 of formation such as flexible lithium ion battery above, in order to save
About length, also repeat no more herein.Wherein, the process for assembling battery core 02 can assemble in special guide groove to carry out in battery core.Should
Special guide groove can a upper end open groove, flexible shell 01 is placed in bottom portion of groove, then pressed on flexible shell 01
Battery core is assembled according to the structure of battery core 02.
In above-mentioned steps S4, the encapsulation process by battery core 02 and flexible shell 01 can be particularly according to lithium ion battery
Soft lithium ion battery conventional sectional processing.The method of injection electrolyte 03 and ripening can also be lithium ion battery routine
Method processing.The battery structure that the encapsulation process of battery core 02 and flexible shell 01 is handled is as shown in Figure 5.
It is to be aged be disposed after, secondary encapsulation processing method or the effect to be reached are carried out to the battery after assembling
It is：Interval section contained by the positive pole 1, the interval section contained by the negative pole 2 and barrier film 3 and flexible shell 01 are formed
Section 04 is sealed, some sections of positive electrode material layers 12 contained by the positive pole 1 and some sections of negative electrode material layers contained by the negative pole 2
22 and flexible shell 01 formed by the battery cell 05 connected of the sealing section 04, as shown in Figure 7.Now, electrolyte 03
It is filled in the battery cell 05.
In one embodiment, the secondary encapsulation processing in step S4 is completed by encapsulation fixture, the packaging clip
06 lamps structure as shown in fig. 6, it includes upper fixture 61 and lower clamp 62, the upper fixture 61 and lower clamp 62 be equipped with it is described
Groove 63 corresponding to some sections of positive electrode material layers 12 or some sections of sizes of negative electrode material layer 22, while the upper fixture 61 and lower folder
Tool 62 is equipped with projection 64 corresponding with the interval section size contained by the interval section or the negative pole 2 contained by the positive pole 1,
And described raised 64 being arranged alternately with the groove 63 of setting of the upper fixture 61 and lower clamp 62, the upper fixture 61 is set
Projection 64 that sets of projection 64 and lower clamp 62 it is relative, to realize the shape for sealing section 04 of above-mentioned flexible lithium ion battery
Into the groove 63 that the upper fixture 61 is set is relative with the groove 63 that lower clamp 62 is set, to realize above-mentioned flexible lithium-ion electric
The formation of the battery cell 05 in pond.In the presence of the packaging clip 06, lead to the interval section contained by raised 64 pairs of positive poles 1 or institute
State the interval section pressure contained by negative pole 2 so that this is electrodeless, and material section is combined together, and is such as coated with by the surface of barrier film 3
Or be directly that the characteristic of gelatin membrane 3 is pressed, such as hot pressing so that interval section or the negative pole 2 contained by positive pole 1
Contained interval section is closely integrated the sealing section 04 to form above-mentioned flexible lithium ion battery, so, positive electrode material layer
For 12 or some sections of negative electrode material layers 22 due to being at the groove 63 of packaging clip 06, it is formed above-mentioned flexible lithium ion automatically
The battery cell 05 of battery, now electrolyte 03 can also be overstock to several battery cells 05, so as to formed as shown in Figure 7
Flexible lithium ion battery.Therefore, packaging clip 06 effectively increase the secondary encapsulation of above-mentioned flexible lithium ion battery efficiency and
The stability of battery.
From the foregoing, the flexible lithium ion battery that above-mentioned flexible lithium ion battery preparation method to prepare has without electricity
Several of pole material and electrolyte 03 seal section 04 and containing several of electrode material and electrolyte battery cells 05, and
Sealing section 04 is arranged alternately with battery cell 05, that is to say the battery cell 05 that the sealing section 04 is connected.So, encapsulate
Therefore sealing section 04 contained by the flexible lithium ion battery of formation, encapsulates formation due to no electrode material and electrolyte
Flexible lithium ion battery can fold at sealing section 04, assign cell flexible, several battery cells 05 then have electric energy
Output function.In addition, above-mentioned flexible lithium ion battery preparation method particularly by means of packaging clip 06, not only cause this method effect
Rate is high, and ensure that flexible lithium ion battery stable performance and security performance that encapsulation is formed.
On the basis of another aspect, flexible lithium ion battery above and preparation method thereof, the utility model embodiment is also
Provide a kind of electronic product.The electronic product it is natural be include circuit board and related electronic component and be
Electronic component provides the power supply of work.Wherein, power supply is flexible lithium ion battery described above.Preferable circuit board is flexible
Circuit board.So, the present embodiment electronic product can be bent repeatedly according to use state.As above-mentioned the utility model battery can be with
It is arranged on inside wrist-watch wrist strap, be also possible to prevent below the electronic product screen for needing to be repeatedly completed etc., effectively facilitate soft
The development of property electronic product.
In conjunction with instantiation, the utility model embodiment flexible lithium ion battery and preparation method thereof is carried out further
Describe in detail.
Embodiment 1
The present embodiment provides a kind of flexible lithium ion battery and preparation method thereof.
The flexible lithium ion battery include being arranged on the battery core being made up of positive pole, negative pole, barrier film in flexible shell and
Electrolyte.Wherein,
Flexible shell is aluminum plastic film, and electrolyte is lithium-ion battery electrolytes；
Positive pole includes aluminum foil current collector, and painting is located at aluminium foil surface positive electrode material layer, and positive electrode be by some sections just
Pole material layer forms, and has interval between adjacent two sections of positive electrode material layers.Wherein, the width of each section of positive electrode material layer is
10mm, thickness are 92 μm, and the interval width between adjacent two sections of positive electrode material layers is 3mm.Positive electrode, conductive agent and
PVDF binding agents, and the mass content ratio of positive electrode, conductive agent and binding agent is 96%：2%：2%.
Negative pole includes copper foil current collector, and painting is located at copper foil surface negative electrode material layer, and negative material is negative by some sections
Pole material layer forms, and has interval between adjacent two sections of negative electrode material layers.Wherein, the width of each section of negative electrode material layer is
12mm, thickness are 102 μm, and the interval width between adjacent two sections of negative electrode material layers is 4mm.Negative electrode material layer includes negative pole
Material, conductive agent and butadiene-styrene latex binding agent and sodium carboxymethylcellulose binding agent, and negative material, conductive agent, carboxymethyl are fine
The mass content ratio for tieing up plain sodium binding agent and butadiene-styrene latex binding agent is 96%：1.0%：1.2%：1.8%.
Barrier film is high-molecular gel barrier film, and it is laminated between the positive pole and negative pole and forms battery core.
The present embodiment flexible lithium ion battery method for packing：
S11：Positive electrode slurry is coated with to the positive pole of positive electrode material layer of the aluminium foil surface preparation with subsection setup, and phase
Adjacent two positive electrode material layers have gap；
S12：Negative material slurry is coated with to the negative pole of negative electrode material layer of the copper foil surface preparation with subsection setup, and phase
Adjacent two negative electrode material layers have gap；
S13：By negative pole prepared by the step S11 positive poles prepared and S12 according to the structural relation shown in Fig. 1 by flexible positive pole
With the alternately laminated combination of flexible negative pole, and between adjacent flexible positive pole and flexible negative pole be laminated gelatin membrane both are separated,
Form flexible battery core.Wherein, in battery core, some sections of positive electrode material layers contained by positive pole and some sections of negative pole materials contained by negative pole
The bed of material, which corresponds, to be set, while the interval region between the adjacent two sections of positive electrode material layers of some sections of positive electrode material layers and some sections
Interval region between the adjacent two sections of negative electrode material layers of negative electrode material layer also corresponds setting；
S14：The battery core is placed in flexible shell and is packaged processing, and injects electrolyte, be then placed on as
Ripening is carried out in encapsulation fixture shown in Fig. 6, then packaging by hot pressing fixture carries out secondary encapsulation processing so that contained by positive pole
Interval section, the interval section contained by the negative pole and barrier film and flexible shell form sealing section, if contained by positive pole
Dry section positive electrode material layer is formed by the sealing section with some sections of negative electrode material layers contained by the negative pole and flexible shell
The battery cell of series connection, the electrolyte are filled in the battery cell.
Embodiment 2
The present embodiment provides a kind of flexible lithium ion battery and preparation method thereof, wherein, the present embodiment flexibility lithium-ion electric
Pool structure is identical with flexible lithium ion battery in embodiment 1.Difference is contained by the present embodiment flexible lithium ion battery positive pole
The width of each section of positive electrode material layer is 12mm, and thickness is 70~78 μm, the interval between adjacent two sections of positive electrode material layers
Width is 2~3mm.Positive electrode material layer includes positive electrode, conductive agent and PVDF binding agents, and positive electrode, conductive agent and viscous
The mass content ratio for tying agent is 97.0%：1.2%：1.8%.
The width of each section of negative electrode material layer contained by negative pole is 14mm, and thickness is 92-100 μm, adjacent two sections of negative pole materials
The interval width between the bed of material is 2~3mm.Negative electrode material layer includes negative material, conductive agent and butadiene-styrene latex binding agent
And sodium carboxymethylcellulose binding agent, and negative material, conductive agent, sodium carboxymethylcellulose binding agent and butadiene-styrene latex binding agent
Mass content ratio be 96.5%：0.5%：1.2%：1.8%.
Embodiment 3
The present embodiment provides a kind of flexible lithium ion battery and preparation method thereof, wherein, the present embodiment flexibility lithium-ion electric
Pool structure is identical with flexible lithium ion battery in embodiment 1.Difference is contained by the present embodiment flexible lithium ion battery positive pole
The width of each section of positive electrode material layer is 6-7mm, and thickness is 79-87 μm, the interval between adjacent two sections of positive electrode material layers
Width is 5-6mm.Positive electrode material layer includes positive electrode, conductive agent and PVDF binding agents, and positive electrode, conductive agent and bonding
The mass content ratio of agent is 96.5%：1.5%：2.0%.
The width of each section of negative electrode material layer contained by negative pole is 10mm, and thickness is 109-117 μm, adjacent two sections of negative pole materials
The interval width between the bed of material is 5-6mm.Negative electrode material layer include negative material, conductive agent and butadiene-styrene latex binding agent and
Sodium carboxymethylcellulose binding agent, and negative material, conductive agent, sodium carboxymethylcellulose binding agent and butadiene-styrene latex binding agent
Mass content ratio is 95.5%：1.0%：1.4%：2.1%.
Embodiment 4
The present embodiment provides a kind of flexible lithium ion battery and preparation method thereof, wherein, the present embodiment flexibility lithium-ion electric
Pool structure is identical with flexible lithium ion battery in embodiment 1.Difference is contained by the present embodiment flexible lithium ion battery positive pole
The width of each section of positive electrode material layer is 6mm, and thickness is 97-105 μm, and the interval between adjacent two sections of positive electrode material layers is wide
Spend for 5~6mm.Positive electrode material layer includes positive electrode, conductive agent and PVDF binding agents, and positive electrode, conductive agent and bonding
The mass content ratio of agent is 95.5%：2.0%：2.5%.
The width of each section of negative electrode material layer contained by negative pole is 8mm, and thickness is 118-126 μm, adjacent two sections of negative pole materials
The interval width between the bed of material is 4-5mm.Negative electrode material layer include negative material, conductive agent and butadiene-styrene latex binding agent and
Sodium carboxymethylcellulose binding agent, and negative material, conductive agent, sodium carboxymethylcellulose binding agent and butadiene-styrene latex binding agent
Mass content ratio is 95.0%：1.5%：1.5%:：2.5%.
Performance test
The flexible lithium ion battery that above-described embodiment 1 to 4 is provided carries out following correlated performance test, and test result is as follows
State shown in table 1.
Table 1
As shown in Table 1, the flexible lithium ion battery that the present embodiment provides is flexible, can be soft shown in sealing section Fig. 7
Property lithium ion battery sealing section 04 at bend repeatedly, if embodiment 1 up to bending 400 times repeatedly, and its energy density
It is excellent with cycle performance.Other the present embodiment flexible lithium ion battery thickness liquid is very thin.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model
All any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (8)
1. a kind of flexible lithium ion battery, including flexible shell, the battery core in the housing and electrolyte, the battery core by
Positive pole, negative pole and the barrier film composition being laminated between the positive pole and negative pole, it is characterised in that：
The positive pole includes plus plate current-collecting body and applies the positive electrode material layer for being located at the plus plate current-collecting body surface, the positive electrode
Layer is made up of some sections of positive electrode material layers, has interval section between adjacent two sections of positive electrode material layers；
The negative pole includes negative current collector and applies the negative electrode material layer for being located at the negative current collector surface, the negative material
Layer is made up of some sections of negative electrode material layers, has interval section between adjacent two sections of negative electrode material layers；
And some sections of positive electrode material layers contained by the positive pole correspond with some sections of negative electrode material layers contained by the negative pole,
Interval section contained by the positive pole corresponds with the interval section contained by the negative pole；Spacer region contained by the positive pole
Between, the interval section contained by the negative pole and barrier film and flexible shell form sealing section, some sections contained by the positive pole
Positive electrode material layer is formed with some sections of negative electrode material layers contained by the negative pole and flexible shell and connected by the sealing section
Some battery cells, the electrolyte is filled in the battery cell.
2. flexible lithium ion battery according to claim 1, it is characterised in that：Adjacent two sections of positive poles contained by the positive pole
The interval section between adjacent two sections of negative electrode material layers contained by the interval section and the negative pole between material layer
Width is 2-6mm.
3. flexible lithium ion battery according to claim 1, it is characterised in that：Each section of positive pole material contained by the positive pole
The width of each section of negative electrode material layer contained by the bed of material and the negative pole is 8-12mm.
4. according to any described flexible lithium ion batteries of claim 1-3, it is characterised in that：The plus plate current-collecting body one side
The thickness of the positive electrode material layer is 55-120 μm.
5. according to any described flexible lithium ion batteries of claim 1-3, it is characterised in that：The negative current collector one side
The thickness of the negative electrode material layer is 60-140 μm.
6. according to any described flexible lithium ion batteries of claim 1-3, it is characterised in that：The thickness of the barrier film is 9-20
μm。
7. flexible lithium ion battery according to claim 6, it is characterised in that：The barrier film is gelatin membrane.
8. a kind of electronic product, it is that power supply is used as using any described flexible lithium ion batteries of claim 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720372215.5U CN206628549U (en) | 2017-04-07 | 2017-04-07 | Flexible lithium ion battery and electronic product |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720372215.5U CN206628549U (en) | 2017-04-07 | 2017-04-07 | Flexible lithium ion battery and electronic product |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107240700A (en) * | 2017-04-07 | 2017-10-10 | 深圳市优特利电源有限公司 | flexible lithium ion battery and preparation method thereof and electronic product |
| CN114094194A (en) * | 2020-08-25 | 2022-02-25 | 比亚迪股份有限公司 | Method and device for preparing pole core |
| WO2023244850A1 (en) * | 2022-06-17 | 2023-12-21 | Meta Platforms Technologies, Llc | Apparatus, system, and method for achieving flexibility and durability in batteries |
-
2017
- 2017-04-07 CN CN201720372215.5U patent/CN206628549U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107240700A (en) * | 2017-04-07 | 2017-10-10 | 深圳市优特利电源有限公司 | flexible lithium ion battery and preparation method thereof and electronic product |
| CN114094194A (en) * | 2020-08-25 | 2022-02-25 | 比亚迪股份有限公司 | Method and device for preparing pole core |
| CN114094194B (en) * | 2020-08-25 | 2024-05-07 | 比亚迪股份有限公司 | Method and device for preparing pole core |
| WO2023244850A1 (en) * | 2022-06-17 | 2023-12-21 | Meta Platforms Technologies, Llc | Apparatus, system, and method for achieving flexibility and durability in batteries |
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