CN205723715U - Flexible packing lithium ion battery - Google Patents
Flexible packing lithium ion battery Download PDFInfo
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- CN205723715U CN205723715U CN201620707570.9U CN201620707570U CN205723715U CN 205723715 U CN205723715 U CN 205723715U CN 201620707570 U CN201620707570 U CN 201620707570U CN 205723715 U CN205723715 U CN 205723715U
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- lithium ion
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The application relates to flexible packing lithium ion battery.Soft Roll includes naked battery core, outer packaging bag and some bonds, described naked battery core includes thin web, described thin web wraps up described naked battery core, described naked battery core is encapsulated in described outer packaging bag, described thin web is bonding by described bond with described outer packaging bag, each described bond all from the side of described naked battery core around to the opposite side of described naked battery core, each described bond all includes the first adhesive linkage and the second adhesive linkage, described first adhesive linkage is bonding with described thin web, described second adhesive linkage is bonding with described outer packaging bag, and the viscosity of described first adhesive linkage is less than the viscosity of described second adhesive linkage.Use the technical scheme of the application, rupturing and the incidence rate of damage of battery of thin web can be reduced.
Description
Technical field
The application relates to technical field of lithium ion, particularly relates to a kind of flexible packing lithium ion battery.
Background technology
In flexible packing lithium ion battery, naked battery core is generally wound by anode pole piece and cathode pole piece/is formed by stacking.At volume
At the ending that/superposition completes, adhesive tape is utilized naked battery core and outer packaging bag to be adhesively fixed.The end of two kinds of pole pieces is from each
Extend out on the matrix of pole piece thin web, and two kinds of pole pieces, after winding/superposition completes, are generally wrapped in naked battery core by thin web
Outside, adhesive tape actually adhesive tape bonding with naked battery core is bonding with thin web.
In correlation technique, the adhesive tape for bonding outer packaging bag Yu thin web generally uses hot melt adhesive adhesive tape, and this is brood lac
The viscosity of band is strong, and bonding force is big.During flexible packing lithium ion battery falls, can produce relatively between thin web and packaging bag
Big mastication forces.Firmly and thin web self-strength ratio again is relatively low due to bonding between thin web and outer packaging bag, therefore,
This can cause thin web to rupture under the effect of mastication forces, causes the damage of flexible packing lithium ion battery.
It is, therefore, desirable to provide a kind of improved plan solves drawbacks described above.
Utility model content
This application provides a kind of flexible packing lithium ion battery, in battery falling process, can effectively slow down thin web
Mastication forces, reduce thin web and rupture the incidence rate with cell damage.
This application provides a kind of flexible packing lithium ion battery, including naked battery core, outer packaging bag and some bonds,
Described naked battery core includes thin web, and described thin web wraps up described naked battery core,
Described naked battery core is encapsulated in described outer packaging bag, and described thin web and described outer packaging bag are by described bond
It is bonding,
Each described bond all from the side of described naked battery core around to the opposite side of described naked battery core,
Each described bond all includes the first adhesive linkage and the second adhesive linkage, described first adhesive linkage and described thin film
Plate is bonding, and described second adhesive linkage is bonding with described outer packaging bag, and the viscosity of described first adhesive linkage is less than described second
The viscosity of adhesive linkage.
Preferably, described naked battery core includes head and afterbody, described bond from the side of described naked battery core through institute
State head and/or the described afterbody opposite side around to described naked battery core.
Preferably, the described bond zone line from the side of described naked battery core is through described head and/or described tail
Portion is around to the zone line of the opposite side of described naked battery core.
Preferably, in some described bonds, having is the first bond at least partially, and also having is second at least partially
Bond, described first bond walks around from described head, and described second bond is walked around from described afterbody, described first bonding
Between part and described second bond, all leave gap in the same side of described naked battery core.
Preferably, described first bond is oppositely arranged with described second bond.
Preferably, the quantity of described first bond and described second bond is multiple.
Preferably, multiple described first bonds are arranged side by side along the width of described naked battery core, and multiple described second
Bond is arranged side by side along the width of described naked battery core.
Preferably, each described bond also includes base layer, described first adhesive linkage, described base layer and described
Two adhesive linkages are cascading.
Preferably, described base layer is PP layer or pet layer.
Preferably, each described bond also includes that the first matrix processes layer and the second matrix processes layer, and described first glues
Connect layer, described first matrix processes layer, described base layer, described second matrix process layer and described second adhesive linkage layer successively
Folded setting.
The technical scheme that the application provides can reach following beneficial effect:
Flexible packing lithium ion battery provided herein, have employed the double-sided adhesive fitting that viscosity is different, and viscosity is less
The first adhesive linkage bonding with the thin web in naked battery core, reduce the bonding force between bond and thin web with this.First, when
When using the first adhesive linkage of less viscosity bonding with thin web, bonding force between the two can be relatively small.Fall at battery
During falling, and under less bonding force, there will be relative displacement between the two.When battery falls, this relative displacement energy
Enough slow down the mastication forces that thin web is caused.But, owing to battery is to fall moment, even if bonding force is relatively small, this is relative
Displacement also can cause stress to concentrate in the bonding site of thin web, and this stress can cause thin web rupturing in various degree equally.
Therefore, also need bond from the side of naked battery core around to the opposite side of naked battery core, so that bond forms U-shaped structure, this U-shaped
Naked battery core can be formed and support by the bottom of structure, and consequent support force can reduce naked battery core in outer packaging bag
Amount of movement, thus reduce the relative displacement between bond and thin web, reduce rupturing and the damage of battery of thin web with this
Bad incidence rate.
It should be appreciated that it is only exemplary that above general description and details hereinafter describe, can not be limited this
Application.
Accompanying drawing explanation
The sectional view I of the naked battery core that Fig. 1 is provided by the embodiment of the present application；
The sectional view II of the naked battery core that Fig. 2 is provided by the embodiment of the present application；
The sectional view III of the naked battery core that Fig. 3 is provided by the embodiment of the present application；
The sectional view of the bond that Fig. 4 is provided by the embodiment of the present application.
Reference:
The naked battery core of 10-；
101-lug；
102-thin web；
20-outer packaging bag；
30-bond；
301-the first adhesive linkage；
302-the second adhesive linkage；
303-base layer.
Accompanying drawing herein is merged in description and constitutes the part of this specification, it is shown that meet the enforcement of the application
Example, and for explaining the principle of the application together with description.
Detailed description of the invention
Below by specific embodiment and combine accompanying drawing the application is described in further detail.
This application provides a kind of flexible packing lithium ion battery, including naked battery core 10, outer packaging bag 20 and bond 30.Naked
Battery core 10 is encapsulated in outer packaging bag 20, and naked battery core 10 is bonded together with outer packaging bag 20 by bond 30.
As it is shown in figure 1, naked battery core 10 generally includes pole piece, lug 101 and thin web 102.Pole piece through winding/superposition,
And wrapped up by thin web 102, lug 101 is connected on pole piece and stretches out from naked battery core 10, and naked battery core 10 is stretched
The one end going out lug 101 is defined as the head of naked battery core 10, and the other end is defined as the afterbody of naked battery core 10.In the present embodiment, thin
Lamina membranacea 102, as the parent plate of pole piece, belongs to a part for pole piece.In other examples, thin web 102 can also be selected
Individually thin film class part.
Bond 30 is around to the opposite side of naked battery core 10 and thin by be wrapped in outside naked battery core 10 from the side of naked battery core 10
Lamina membranacea 102 is bonding with outer packaging bag 20.Bond 30 includes the first adhesive linkage 301 and the second adhesive linkage 302, the first adhesive linkage
The viscosity of 301 is less than the viscosity of the second adhesive linkage 302, and is glued with thin web 102 by the first adhesive linkage 301 of less viscosity
Connecing, the second adhesive linkage 302 that viscosity is bigger is bonding with outer packaging bag 20.
First, when the first adhesive linkage 301 using less viscosity is bonding with thin web 102, bonding force between the two
Can be relatively small.During battery falls, and under less bonding force, there will be relative displacement between the two.Electricity
When pond is fallen, this relative displacement can slow down the mastication forces causing thin web 102.But, owing to battery is to fall, i.e. moment
Making bonding force relatively small, this relative displacement also can cause stress to concentrate in the bonding site of thin web 102, and this stress equally can
Cause thin web 102 rupturing in various degree.Therefore, also need bond 30 from the side of naked battery core 10 around to naked battery core 10
Opposite side, so that bond 30 forms U-shaped structure, naked battery core 10 can be formed and support by the bottom of this U-shaped structure, and thus produces
Raw support force can reduce the naked battery core 10 amount of movement in outer packaging bag 20, thus reduces bond 30 and thin web 102
Between relative displacement, reduce rupturing and the incidence rate of damage of battery of thin web 102 with this.
The size of the viscosity of the first adhesive linkage 301 and the second adhesive linkage 302 can be come by selecting the viscose glue of unlike material
Realize.It addition, the first adhesive linkage 301 can be viscous due to cause after being soaked by electrolyte inside flexible packing lithium ion battery
Degree reduces.Second tack coat 302 can make its viscosity increase by the mode such as heat treatment or chemical reaction.
It is to be appreciated that bond 30 along where to from the side of naked battery core 10 around to naked battery core 10 opposite side and
The usage quantities of bond 30 etc. can select to arrange according to practical situation, and this is not construed as limiting by the application.
In the present embodiment, bond 30 is preferably as follows three kinds of embodiments:
Embodiment one
As it is shown in figure 1, by some bonds 30 from the side of naked battery core 10 through the head of naked battery core 10 around to naked battery core
The opposite side of 10.In the actual application of flexible packing lithium ion battery, tear at corresponding naked battery core 10 head on thin web 102
More serious, and the consequence thereby resulted in would generally directly result in the inefficacy of soft guarantee lithium ion battery.Pass through embodiment
One, can effectively reduce flexible packing lithium ion battery crash rate in actual applications, improve reliability during its application.
Further, according to the structure of flexible packing lithium ion battery, the part of its corresponding naked battery core 10 head is weak point
Position.On the one hand, when electrolyte is poured in outer packaging bag 20, generally at a side packing of naked battery core 10 head；The opposing party
Face, lug 101 is connected to the head of naked battery core 10.When using embodiment one, it is external that bond 30 can reduce naked battery core 10
The impact at the top of packaging bag 20, the incidence rate of the defects such as reduction causes closedtop to wash open and lug fractures.
Embodiment two
As in figure 2 it is shown, by some bonds 30 from the side of naked battery core 10 through the afterbody of naked battery core 10 around to naked battery core
The opposite side of 10.In the actual application of flexible packing lithium ion battery, some defect breaking from naked battery core 10 afterbody
Damage.In order to reduce the generation of drawbacks described above, embodiment two can be used, the generation damaged to reduce the appearance of naked battery core 10 afterbody
Rate.
In two kinds of above-mentioned embodiments, in different application occasion, cause defect for flexible packing lithium ion battery
Position is different, and bond 30 is arranged on the diverse location of naked battery core 10 selectively, to the protection of naked battery core 10 more
Targetedly.And use any one in both embodiments above-mentioned, the manufacturing process of naked battery core 10 can be simplified.
Embodiment three
As it is shown on figure 3, bond 30 includes several, wherein some bond 30 is the first bond, also one
Part is the second bond.First bond from the side of naked battery core 10 through another around to naked battery core 10 of the head of naked battery core 10
Side；Second bond from the side of naked battery core 10 through the afterbody of naked battery core 10 around to the opposite side of naked battery core 10.According to
On description be not difficult to find out, embodiment three is embodiment one and embodiment two a combination of both, by embodiment one He
Embodiment two combines, and naked battery core 10 and head and afterbody can be made all to be protected, further reduce thin web 102 and exist
The incidence rate of falling process tear, improves the functional reliability of flexible packing lithium ion battery.
In three of the above embodiment, when bond 30 from the side of naked battery core 10 through head and/or afterbody around to
During the opposite side of naked battery core 10, two ends of bond 30 can be arranged on optional position.Such as, bond can be from naked electricity
The head zone of the side of core 10 through head and/or afterbody around to the head zone of the opposite side of naked battery core 10, bond 30
Can also from the tail region of the side of naked battery core 10 through head and/or afterbody around to the tailer of the opposite side of naked battery core 10
Territory etc..
In the embodiment of the present embodiment, preferably bond 30 from the zone line of naked battery core 10 through head and/or tail
Portion is around to the zone line of the opposite side of naked battery core, and this mode can ensure that have between bond 30 and thin web 102 enough
Connecting length, both avoided the coming off of causing due to relative displacement bigger between bond 30 and thin web 102, kept away again
Exempt from the waste of the bond 30 caused owing to connecting length is relatively big.
Additionally, in embodiment three, still further preferably the first bond and the second bond are oppositely arranged.According to this
One embodiment, bonding with the outer packaging bag 20 respectively bonding plane in naked battery core 10 both sides is symmetrical, so that between the two
Bonding force Relatively centralized.Therefore, the naked battery core 10 connective stability in outer packaging bag 20 can be further strengthened.
And further, in the same side of naked battery core 10, between the first bond and the second bond, all it is reserved with gap.
This gap makes the first bond and the second bond separate predeterminable range, will not send out when both are bonding with naked battery core 10 respectively
Raw interference, it is to avoid cause bonding unstable defect owing to interfering.
In three of the above embodiment, it can be one that some bonds 30 refer to bond 30, it is also possible to be many
Individual.The quantity of bond 30 is arranged according to actual needs, and this is not construed as limiting by the application.
Such as, in certain embodiments, when selecting multiple bond 30, multiple bonds 30 can be along naked battery core 10
Width (direction of vertical paper in Fig. 1～Fig. 3) be arranged side by side.
As shown in Figure 4, bond 30 further preferably includes base layer 303.When bond 30 includes base layer 303, first
Adhesive linkage 301, base layer 303 and the second adhesive linkage 302 are cascading.Use the program, can be different viscosities
Elastomeric-type pressure sensitive adhesive or resin pressure sensitive adhesive are uniformly coated on base layer 303 so that the simplified manufacturing process of bond 30.
The material of base layer 303 has multiple choices, and in the present embodiment, base layer 303 is preferably provided to PP (polypropylene layer) layer or PET
(poly terephthalic acid class plastics) layer.
Further, bond 30 can also include that the first matrix processes layer and the second matrix processes layer.Work as bond
30 include that when the first matrix processes layer and the second matrix process layer, first adhesive linkage the 301, first matrix processes layer, base layer
303, the second matrix processes layer and the second adhesive linkage 302 is cascading.First matrix processes layer can increase base layer
303 firmness being connected with the first adhesive linkage 301.In like manner, the second matrix process layer can facilitate base layer 303 bonding with second
The firmness that layer 302 connects so that the performance of bond 30 is more excellent.
In this application, in order to verify the beneficial effect of technical scheme provided herein further, after improving
Technical scheme make flexible packing lithium ion battery test sample 1#～3#, and according to prior art make flexible-packaged lithium from
The test sample 4# of sub-battery, and both are compared test.
Test sample 1#
The preparation of anode pole piece:
By positive active material cobalt acid lithium (LiCoO2), conductive agent conductive carbon (Super P), binding agent Kynoar
(PVDF) it is blended in solvent N-methyl pyrilidone (NMP) according to the mass ratio of 96:2:2, stirs, obtain positive pole slurry
Material.The anode sizing agent obtained is coated on the plus plate current-collecting body that thickness is 12um, and through being dried, colds pressing, obtain being compacted close
Degree is the pole piece of 3.8g/cm3.Anode pole piece is through cut-parts, and welds positive pole ear, obtains anode pole piece.
The preparation of cathode pole piece:
By negative electrode active material graphite, conductive agent conductive carbon (Super P), binding agent butadiene-styrene rubber (SBR) and thickening agent
Sodium carboxymethyl cellulose (CMC) is blended in aqueous solvent according to the mass ratio of 94:2:2:2, stirs, and obtains negative pole slurry
Material.Obtained cathode size is coated on the negative current collector that thickness is 10um, and through being dried, colds pressing, obtain compacted density
Pole piece at 1.6g/cm3.Cathode pole piece is through cut-parts, and welds negative lug, obtains cathode pole piece.
The preparation of electrolyte:
Ethyl methyl carbonate (EMC), diethyl carbonate (DEC), ethylene carbonate (EC), Allyl carbonate (PC) according to 1:
The ratio mix homogeneously of 1:1:1, adds lithium hexafluoro phosphate (LiPF6) as solute, and the concentration making lithium hexafluoro phosphate (LiPF6) is
1M, makes electrolyte.
The preparation of flexible packing lithium ion battery:
By the anode pole piece completed, cathode pole piece and barrier film by being wound into naked battery core 10 successively, anode pole piece is with negative
Pole pole piece is separated by barrier film, and barrier film can use 16um PP/PE/PP film, and outer packaging bag 20 uses aluminum-plastic packaging bag.
Bond 30 from the side of naked battery core 10 through head around to the opposite side of naked battery core 10, with outer packaging bag 20 by naked
Battery core 10 encapsulates, and leaves liquid injection port.Under the conditions of 85 DEG C, carry out hot pressing process with 0.5Mpa pressure, be then passed through perfusion electrolysis
The operations such as liquid, chemical conversion, capacity make flexible packing lithium ion battery.
Test sample 2#
The preparation of anode pole piece:
By positive active material cobalt acid lithium (LiCoO2), conductive agent conductive carbon (Super P), binding agent Kynoar
(PVDF) it is blended in solvent N-methyl pyrilidone (NMP) according to the mass ratio of 96:2:2, stirs, obtain positive pole slurry
Material.The anode sizing agent obtained is coated on the plus plate current-collecting body that thickness is 12um, through being dried, colds pressing, obtain compacted density
Pole piece for 3.8g/cm3.Anode pole piece is through cut-parts, and welds positive pole ear, obtains anode pole piece.
The preparation of cathode pole piece:
By negative electrode active material graphite, conductive agent conductive carbon (Super P), binding agent butadiene-styrene rubber (SBR) and thickening agent
Sodium carboxymethyl cellulose (CMC) is blended in aqueous solvent according to the mass ratio of 94:2:2:2, stirs, and obtains negative pole slurry
Material.Obtained cathode size is coated on the negative current collector that thickness is 10um, through being dried, colds pressing, obtains compacted density and exist
The pole piece of 1.6g/cm3.Cathode pole piece is through cut-parts, and welds negative lug, obtains cathode pole piece.
The preparation of electrolyte:
Ethyl methyl carbonate (EMC), diethyl carbonate (DEC), ethylene carbonate (EC), Allyl carbonate (PC) according to 1:
The ratio mix homogeneously of 1:1:1, adds lithium hexafluoro phosphate (LiPF6) as solute, and the concentration making lithium hexafluoro phosphate (LiPF6) is
1M, makes electrolyte.
The preparation of flexible packing lithium ion battery:
By the anode pole piece obtained, cathode pole piece and barrier film by being wound into naked battery core 10 successively, barrier film uses 16um PP/
PE/PP film, outer packaging bag 20 uses aluminum-plastic packaging bag.
Bond 30 from the side of naked battery core 10 through afterbody around to the opposite side of naked battery core 10, with outer packaging bag 20 by naked
Battery core encapsulates, and leaves liquid injection port.Under the conditions of 85 DEG C, carry out hot pressing process with 0.5Mpa pressure, be then passed through irrigate electrolyte,
The operations such as chemical conversion, capacity make flexible packing lithium ion battery.
Test sample 3#
The preparation of anode pole piece:
By positive active material cobalt acid lithium (LiCoO2), conductive agent conductive carbon (Super P), binding agent Kynoar
(PVDF) it is blended in solvent N-methyl pyrilidone (NMP) according to the mass ratio of 96:2:2, stirs, obtain positive pole slurry
Material.The anode sizing agent obtained is coated on the plus plate current-collecting body that thickness is 12um, through being dried, colds pressing, obtain compacted density
Pole piece for 3.8g/cm3.Anode pole piece is through cut-parts, and welds positive pole ear, obtains anode pole piece.
The preparation of cathode pole piece:
By negative electrode active material graphite, conductive agent conductive carbon (Super P), binding agent butadiene-styrene rubber (SBR) and thickening agent
Sodium carboxymethyl cellulose (CMC) is blended in aqueous solvent according to the mass ratio of 94:2:2:2, stirs, and obtains negative pole slurry
Material.Obtained cathode size is coated on the negative current collector that thickness is 10um, through being dried, colds pressing, obtains compacted density and exist
The pole piece of 1.6g/cm3.Cathode pole piece is through cut-parts, and welds negative lug, obtains cathode pole piece.
The preparation of electrolyte:
Ethyl methyl carbonate (EMC), diethyl carbonate (DEC), ethylene carbonate (EC), Allyl carbonate (PC) according to 1:
The ratio mix homogeneously of 1:1:1, adds lithium hexafluoro phosphate (LiPF6) as solute, and the concentration making lithium hexafluoro phosphate (LiPF6) is
1M, makes electrolyte.
The preparation of lithium ion battery:
By the anode pole piece obtained, cathode pole piece and barrier film by being wound into naked battery core 10 successively, barrier film uses 16um PP/
PE/PP film, outer packaging bag 20 uses aluminum-plastic packaging bag.
First bond from the side of naked battery core 10 through head around to the opposite side of naked battery core 10, the second bond is from naked
Naked battery core 10 around to the opposite side of naked battery core 10 through afterbody, is encapsulated with outer packaging bag 20, leaves fluid injection by the side of battery core 10
Mouthful.Under the conditions of 85 DEG C, carry out hot pressing process with 0.5Mpa pressure, be then passed through irrigating the operation systems such as electrolyte, chemical conversion, capacity
Become flexible packing lithium ion battery.
Test sample 4#
The preparation of anode pole piece:
By positive active material cobalt acid lithium (LiCoO2), conductive agent conductive carbon (Super P), binding agent Kynoar
(PVDF) it is blended in solvent N-methyl pyrilidone (NMP) according to the mass ratio of 96:2:2, stirs, obtain positive pole slurry
Material.The anode sizing agent obtained is coated on the plus plate current-collecting body that thickness is 12um, through being dried, colds pressing, obtain compacted density
Pole piece for 3.8g/cm3.Anode pole piece is through cut-parts, and welds positive pole ear, obtains anode pole piece.
The preparation of cathode pole piece:
By negative electrode active material graphite, conductive agent conductive carbon (Super P), binding agent butadiene-styrene rubber (SBR) and thickening agent
Sodium carboxymethyl cellulose (CMC) is blended in aqueous solvent according to the mass ratio of 94:2:2:2, stirs, and obtains negative pole slurry
Material.Obtained cathode size is coated on the negative current collector that thickness is 10um, through being dried, colds pressing, obtains compacted density and exist
The pole piece of 1.6g/cm3.Cathode pole piece is through cut-parts and welds negative lug, obtains cathode pole piece.
The preparation of electrolyte:
Ethyl methyl carbonate (EMC), diethyl carbonate (DEC), ethylene carbonate (EC), Allyl carbonate (PC) according to 1:
The ratio mix homogeneously of 1:1:1, adds lithium hexafluoro phosphate (LiPF6) as solute, and the concentration making lithium hexafluoro phosphate (LiPF6) is
1M, makes electrolyte.
The preparation of flexible packing lithium ion battery:
By the anode pole piece obtained, cathode pole piece and barrier film by being wound into naked battery core 10 successively, barrier film uses 16um PP/
PE/PP film, outer packaging bag 20 uses aluminum-plastic packaging bag.
Naked battery core 10, by hot melt adhesive adhesive tape bonding, is encapsulated by naked battery core 10 and outer packaging bag 20 with outer packaging bag 20,
Leave liquid injection port.Under the conditions of 85 DEG C, carry out hot pressing process with 0.5Mpa pressure, be then passed through irrigating electrolyte, chemical conversion, capacity
Flexible packing lithium ion battery is made etc. operation.
Fall simulation test
Test equipment: battery mould, circuit tester.
Method of testing: measure flexible packing lithium ion battery open-circuit voltage with circuit tester, by flexible packing lithium ion battery with strong
Power adhesive tape is fixed on battery mould.Battery mould highly drops to rigid ground from 1.5 meters, along the direction in 6 faces of battery, often
6 times, individual face, 36 times altogether.Complete drop test, after standing 1h.
(1) outer packaging bag 20 of observation flexible packing lithium ion battery whether wash open by closedtop；
(2) measure whether flexible packing lithium ion battery voltage decreases beyond 10mV；
(3) whether positive pole ear and the negative lug of disassembling the flexible packing lithium ion battery naked battery core 10 of observation rupture；
(4) whether the thin web 102 taking flexible packing lithium ion battery naked battery core 10 outer cladding of observation apart tears.
Test result is shown in Table 1, and table 1 is the test data of test sample 1#～4#.
Table 1
| Group | Closedtop is washed open | Voltage drop > 10mV | Lug ruptures | Thin web tears | Result |
| Test sample 1# | 0 | 0 | 0 | 0 | Pass |
| Test sample 2# | 0 | 0 | 0 | 0 | Pass |
| Test sample 3# | 0 | 0 | 0 | 0 | Pass |
| Test sample 4# | 0 | 0 | 0 | 9 | Fail |
According to the test data in table 1, the flexible packing lithium ion battery that the application provides can significantly reduce thin film
The incidence rate that the tear of plate 102 and flexible packing lithium ion battery destroy, improves the flexible packing lithium ion battery peace when falling
Quan Xing.
The foregoing is only the preferred embodiment of the application, be not limited to the application, for the skill of this area
For art personnel, the application can have various modifications and variations.All within spirit herein and principle, that is made any repaiies
Change, equivalent, improvement etc., within should be included in the protection domain of the application.
Claims (10)
1. a flexible packing lithium ion battery, including naked battery core, outer packaging bag and some bonds,
Described naked battery core includes thin web, and described thin web wraps up described naked battery core,
Described naked battery core is encapsulated in described outer packaging bag, and described thin web is glued by described bond with described outer packaging bag
Connect, it is characterised in that
Each described bond all from the side of described naked battery core around to the opposite side of described naked battery core,
Each described bond all includes that the first adhesive linkage and the second adhesive linkage, described first adhesive linkage glue with described thin web
Connecing, described second adhesive linkage is bonding with described outer packaging bag, and the viscosity of described first adhesive linkage is second bonding less than described
The viscosity of layer.
Flexible packing lithium ion battery the most according to claim 1, it is characterised in that described naked battery core includes head and tail
Portion, described bond from the side of described naked battery core through described head and/or described afterbody around to another of described naked battery core
Side.
Flexible packing lithium ion battery the most according to claim 2, it is characterised in that described bond is from described naked battery core
The zone line of side through described head and/or described afterbody around to the zone line of the opposite side of described naked battery core.
Flexible packing lithium ion battery the most according to claim 2, it is characterised in that in some described bonds, have at least
A part is the first bond, and also having is the second bond at least partially, and described first bond is walked around from described head, institute
State the second bond to walk around from described afterbody, between described first bond and described second bond, in described naked battery core
The same side all leave gap.
Flexible packing lithium ion battery the most according to claim 4, it is characterised in that described first bond and described second
Bond is oppositely arranged.
Flexible packing lithium ion battery the most according to claim 4, it is characterised in that described first bond and described second
The quantity of bond is multiple.
Flexible packing lithium ion battery the most according to claim 6, it is characterised in that multiple described first bonds are along described
The width of naked battery core is arranged side by side, and multiple described second bonds are arranged side by side along the width of described naked battery core.
Flexible packing lithium ion battery the most according to claim 1, it is characterised in that each described bond also includes matrix
Layer, described first adhesive linkage, described base layer and described second adhesive linkage are cascading.
Flexible packing lithium ion battery the most according to claim 8, it is characterised in that described base layer is PP layer or pet layer.
Flexible packing lithium ion battery the most according to claim 8 or claim 9, it is characterised in that each described bond also includes
First matrix processes layer and the second matrix and processes layer, described first adhesive linkage, described first matrix process layer, described base layer,
Described second matrix processes layer and described second adhesive linkage is cascading.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620707570.9U CN205723715U (en) | 2016-07-06 | 2016-07-06 | Flexible packing lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620707570.9U CN205723715U (en) | 2016-07-06 | 2016-07-06 | Flexible packing lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205723715U true CN205723715U (en) | 2016-11-23 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110071320A (en) * | 2018-01-22 | 2019-07-30 | 宁德新能源科技有限公司 | Battery core and battery |
| CN110379942A (en) * | 2018-04-12 | 2019-10-25 | 宁德新能源科技有限公司 | Battery core component and electrochemical appliance |
| CN113451631A (en) * | 2020-03-27 | 2021-09-28 | 宁德新能源科技有限公司 | Battery structure and electronic device using same |
| CN113795968A (en) * | 2020-12-31 | 2021-12-14 | 宁德新能源科技有限公司 | Battery cell and electronic device using same |
| CN113939952A (en) * | 2021-01-29 | 2022-01-14 | 宁德新能源科技有限公司 | Electrochemical device and electronic apparatus |
| CN114270621A (en) * | 2021-01-29 | 2022-04-01 | 宁德新能源科技有限公司 | Electrochemical device and electronic apparatus |
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2016
- 2016-07-06 CN CN201620707570.9U patent/CN205723715U/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110071320A (en) * | 2018-01-22 | 2019-07-30 | 宁德新能源科技有限公司 | Battery core and battery |
| CN110379942A (en) * | 2018-04-12 | 2019-10-25 | 宁德新能源科技有限公司 | Battery core component and electrochemical appliance |
| CN113451631A (en) * | 2020-03-27 | 2021-09-28 | 宁德新能源科技有限公司 | Battery structure and electronic device using same |
| CN113795968A (en) * | 2020-12-31 | 2021-12-14 | 宁德新能源科技有限公司 | Battery cell and electronic device using same |
| WO2022141339A1 (en) * | 2020-12-31 | 2022-07-07 | 宁德新能源科技有限公司 | Battery cell, and electronic device using battery cell |
| CN113795968B (en) * | 2020-12-31 | 2024-02-23 | 宁德新能源科技有限公司 | Battery cell and electronic device using same |
| CN113939952A (en) * | 2021-01-29 | 2022-01-14 | 宁德新能源科技有限公司 | Electrochemical device and electronic apparatus |
| CN114270621A (en) * | 2021-01-29 | 2022-04-01 | 宁德新能源科技有限公司 | Electrochemical device and electronic apparatus |
| WO2022160273A1 (en) * | 2021-01-29 | 2022-08-04 | 宁德新能源科技有限公司 | Electrochemical device and electronic apparatus |
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