CN107645018A - A kind of electrode assemblie - Google Patents
A kind of electrode assemblie Download PDFInfo
- Publication number
- CN107645018A CN107645018A CN201610572989.2A CN201610572989A CN107645018A CN 107645018 A CN107645018 A CN 107645018A CN 201610572989 A CN201610572989 A CN 201610572989A CN 107645018 A CN107645018 A CN 107645018A
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- Prior art keywords
- electric
- electrode assemblie
- battery
- barrier film
- electrode
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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
-
- 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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- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Battery Electrode And Active Subsutance (AREA)
- Secondary Cells (AREA)
Abstract
Embodiment of the present invention provides electrode assemblie, the electrode assemblie is with the structure wound with the state that wherein multiple element cells with stacked structure are arranged on sheet type barrier film, the electrode assemblie includes the element cell constructed with two or more electrode materials, wherein covering material and sheet type barrier film covering material with cladding on one side thereof of the partition being stacked on the element cell with stacked structure with cladding on both sides.It improves processability prepared by battery and with the electrode assemblie of the battery life suitable with conventional batteries while initial resistance is reduced during the preparation of battery, and includes the lithium secondary battery of the electrode assemblie.
Description
Technical field
The present invention relates to a kind of lithium secondary battery of electrode assemblie.
Background technology
The increase of technological development and demand now with various portable power source devices, to the demand of secondary cell also drastically
Increase.In the secondary battery, by with high-energy-density and working voltage and the lithium of excellent preservation and life characteristics
Secondary cell is widely used as the energy of various electronic products and various mobile devices.
Lithium secondary battery uses metal oxide such as LiCoO as positive electrode active materials and uses carbon material to be lived as negative pole
Property material, porous polymer partition is arranged between negative pole and positive pole, and the nonaqueous electrolytic solution containing lithium salts such as LiPh is used as
The medium that wherein lithium ion moves between negative pole and positive pole.The lithium secondary battery must be in the range of the working voltage of battery
It is basicly stable, it is necessary to have high charge-discharge efficiencies, and must have the ability that ion is migrated under sufficiently high speed.
The lithium secondary battery that voltage is operated above with 3.6V is used as the power supply of portable electron device or by multiple lithiums
Secondary cell is connected in series in high power motor vehicle driven by mixed power.Because the working voltage of lithium secondary battery is nickel-cadmium electricity
The three times of the working voltage of pond or ni-MH battery and the energy density characteristics of per unit weight are also excellent, institute
There is the trend being widely used with lithium secondary battery.In the lithium secondary battery, polymer septum can be coated with
The bonding to electrode is improved while the security, high-temperature storage performance and high temperature cyclic performance that keep monocell.However, this meeting
Cause the raising of battery initial resistance.
The content of the invention
The present invention provides a kind of processability that battery preparation is improved while initial resistance is reduced during the preparation of battery
And the electrode assemblie with the battery life suitable with conventional batteries, and include the lithium secondary battery of the electrode assemblie.
Embodiment of the present invention provides electrode assemblie, and the electrode assemblie is with wherein by with the more of stacked structure
Individual element cell is arranged in the structure of the state winding on sheet type barrier film, and the electrode assemblie, which includes, has two or more electricity
The element cell of pole material construction, wherein the partition being stacked on the element cell with stacked structure is with being coated on its both sides
On covering material and sheet type barrier film there is cladding covering material on one side thereof.
Brief description of the drawings
Including accompanying drawing to provide further understanding for the present invention, the accompanying drawing is incorporated in this specification and forms this explanation
A part for book.Accompanying drawing shows the exemplary embodiment of the present invention, and for explaining original of the invention together with specification
Reason.In the drawing：
Fig. 1 shows the electrode assemblie of the present invention.
Embodiment
Below with reference to the accompanying drawings the preferred embodiments of the invention are described in detail.However, the present invention can be with
Multi-form is implemented and should not be construed as being limited to embodiment specifically described herein.And be to provide these embodiments with
So that present disclosure is detailed and complete, and it will fully convey the scope of the invention to those skilled in the art.
The present invention relates to electrode assemblie 10 and the lithium secondary battery of the electrode assemblie 10 is included, the electrode assemblie 10 has
There is the structure wound with the state that wherein multiple element cells with stacked structure are arranged on sheet type barrier film 40, it is described
Electrode assemblie includes the element cell constructed with two or more electrode materials, wherein being stacked on the unit with stacked structure
Partition 30 on battery is (specific with its side is coated on the covering material and sheet type barrier film 40 coated on both sides
Ground, there is the side of multiple element cells being disposed thereon) on covering material.
Hereinafter, the present invention will be described in more detail.
The present invention relates to electrode assemblie 10 and the lithium secondary battery of the electrode assemblie 10 is included, the electrode assemblie 10 has
Have so that wherein by size, the multiple cell electrodes i.e. positive pole and negative pole corresponding with the size of monocell is alternately stacked and incited somebody to action respectively
Multiple element cells with stacked structure are arranged in the structure of the state winding on sheet type barrier film 40.
The partition 30 being all wrapped by by using both sides to carry out the unit battery in electrode assemblie 10 of the present invention
Cladding.Its reason can be promoted in electrode adhesion to partition 30 and can be while security is kept by property retention
As former state.The thickness of covering material for coating both sides can be in the range of about 0.001um~about 100um.When cladding thickness
When within the above range, the increase of cell thickness can be prevented and the reduced minimum of battery performance can be made.
The electrode assemblie 10 of the present invention has stack/folding-typed structure, wherein double cell (bi-cell) and/or full battery
(fullcell) (such as double cell) is formed by a small amount of element cell in stacking method and multiple is arranged in sheet type barrier film 40
On, subsequent sequential volume is around to generally form as plate profile structure.
The double cell be with the element cell for being arranged in identical electrodes on monocell both sides, such as positive pole/partition/
The cellular construction of negative pole/partition/positive pole and the cellular construction of negative pole/partition/positive pole/partition/negative pole.In order to by using above-mentioned
Double cell forms the electrochemistry single cell for including secondary cell, it is necessary to multiple double cells are stacked, so that with positive pole/every
The double cell of the structure of piece/negative pole/partition/positive pole and with negative pole/partition/positive pole/partition/negative pole structure double cell with it
Between be disposed with the state of barrier film 40 and face each other.In addition, positive terminal 11 and negative terminal 12 project to unit battery
It is outside.
, can be true according to the type and thickness of the electrode material of cladding on the current collector in the electrode assemblie 10 of the present invention
The construction of fixed electrode material.The specific configuration of electrode material is not limited to the typical construction of electrode assemblie 10.
For example, in the case of the positive electrode during the electrode material with different configuration is preferred embodiment, in order to prepare
The electrode assemblie 10 of the present invention, can be carried out to the electrode assemblie 10 formed by first module battery 21 and second unit battery 22
Construction.
Generally, the capacity of secondary cell, life characteristic and high power charging-discharging characteristic may depend on positive electrode active materials
Or the type and thickness of negative active core-shell material.
Therefore, in the case of the positive electrode during the electrode material with different configuration is preferred embodiment, first module
Battery 21 can include one or more materials in lithium and cobalt oxides, lithium manganese oxide and lithium nickel oxide, and second is single
First battery 22 can be included in lithium manganese cobalt/cobalt oxide, lithium nickel manganese oxide, lithium nickel cobalt oxides and lithium manganese nickel cobalt oxide
One or more materials.
The partition 30 being all wrapped by by using both sides is entered come the unit battery in the electrode assemblie 10 to the present invention
Row cladding.Its reason is can to promote in electrode adhesion to partition 30 and will can to protect performance while security is kept
Hold as former state.The thickness of covering material for coating both sides can be in the range of about 0.001~about 100.When cladding thickness exists
When in above range, the reduced minimum of battery performance while preventing cell thickness from increasing, can be made.
Covering material for coating both sides can be selected from lead titanate-zirconate (PZT；Pb (Zr, Ti) O^, lead lanthanum zirconate titanate
(PLZT；Pb1-xLaxZr1-yTiyO3)、Pb(Mg3Nb2/3)O3-PbTiO3(P]MN-PT)、BaTiO3, hafnium oxide (HfO2)、
SrTiO3、TiO2、Al2O3、ZrO2、SnO2、CeO2, MgO, CaO, ZnO and Y2O3In one or more materials.
Double cell can be used as the element cell with stacked structure.Its reason is that have the element cell of higher capacity
Huge advantage be that can use the double cell while cell shapes of double cell are kept, and can also reduce in electricity
Physical size deviation during the preparation process in pond.
So that multiple element cells with stacked structure wherein are arranged in into state on sheet type barrier film 40 to the present invention
Electrode assemblie 10 be wound, and now, the length of sheet type barrier film 40 is not limited to can be used during the winding of monocell
Length.
The barrier film 40 being coated on side is used as to the sheet type barrier film during the folding of the electrode assemblie 10 of the present invention.Make
With the piece type barrier film 40 with the covering material being coated on its side, the decline of cost thus can be realized.Further, since conduct
The content of the covering material of insulator can decline as much as possible, it is possible to further improve battery electrical conductivity and electrically
Can, and multiple electrodes component 10 can be included, thus, it is possible to make maximum capacity and can prevent from being caused by the partition 40 of battery
Output decline.The thickness of covering material for coating side can be in the range of about 0.001ym~about 100ym.When
When coating thickness within the above range, battery performance can be kept intact while cell thickness increase is prevented.
Specifically, the covering material for coating side can be selected from lead titanate-zirconate (PZT), lead lanthanum zirconate titanate
(PLZT)、Pb(Mg3Nb2/3)O3-PbTiO3(P]MN-PT)、BaTiO3, hafnium oxide (HfO2)、SrTiO3、TiO2、Al2O3、ZrO2、
SnO2、CeO2, MgO, CaO, ZnO and Y2O3In one or more materials.
In sheet type barrier film 40, the side for being coated with covering material is with the multiple element cells being disposed thereon
Side.Its reason be can promote by electrode adhesion to partition and can while security is kept by property retention as former state.
The electrode assemblie 10 of the present invention can be used for lithium secondary battery, and when electrical connection and include the two or more secondary electricity of lithium
Chi Shi, battery module or battery pack can be used it for for medium-sized and large-scale plant power supply.Specifically, medium-sized and large-scale dress
The example put can be electric tool；Including electric automobile, hybrid electric vehicle (ffiV) and plug-in hybrid electric vehicle
(PffiV) electric vehicle (EV)；Electric two-wheel vehicle including electric bicycle and Electric Scooter；Electric golf
Car；Electric truck；And electric commercial vehicle (electriccommercialvehicle) or power storage system.
In the present invention, electrode assemblie 10 can be prepared according to typical method as known in the art and by the electrode assemblie
10 lithium secondary batteries formed.
Hereinafter, will according to specific embodiment, the present invention is described in detail, but provide following examples be only used for example
Show the present invention.It should be apparent to those skilled in the art that under conditions of without departing substantially from the subject or scope of the present invention, energy
It is enough to complete various variants and change in the present invention.Thus it is intended that the present invention includes variant and the change of the present invention, as long as
They are in the range of appended claims and its equivalent.
Embodiment 1
(preparing positive pole)
By by lithium and cobalt oxides, carbon black and polyvinylidene fluoride (PVDF) be dispersed in METHYLPYRROLIDONE (NMP) come
Prepare slurry and then the both sides of aluminium foil are coated using the slurry.Coated aluminium foil is carried out fully to dry and right
Afterwards by being suppressed coated aluminium foil to prepare positive pole.
(preparing negative pole)
Prepare slurry by the way that graphite, acetylene black and PVDF are dispersed in NMP and and then utilize the slurry to the two of copper foil
Side is coated.Coated copper foil is carried out fully to dry and and then negative to prepare by suppressing coated copper foil
Pole.
(partition and barrier film)
The both sides of partition be coated with using PZT under about 30um thickness and prepare double cell, thereafter, by double at 13
During the winding of battery electrode group is prepared under about 30um thickness using the barrier film (using PLZT) being coated on side
Part.
Experimental example 2
1) initial resistance：By pressure drop when double of rechargeable battery (SOC50) is discharged under constant current (50A), calculate
Initial resistance, and compared with the monocell with being prepared by using typical method, resistance have dropped about 3%.
2) battery life：When resistance improves 30% during being defined as battery life to store wherein under constant high temperature
Between when, the life-span of monocell of the battery life with being prepared by using typical method is suitable.
As described above, can confirm, electrode assemblie of the invention improves the processability of battery preparation, while reduces initial
Resistance simultaneously has excellent battery life.
Claims (5)
1. a kind of electrode assemblie, including strip barrier film, anode unit, GND unit, it is characterised in that the electricity
Pond positive pole unit and GND unit are respectively separated the both sides for being arranged on strip barrier film, are carried out by the way of folding
Stack.
2. electrode assemblie as claimed in claim 1, wherein the thickness of the sheet type barrier film is in about 0.001ym about 100um
In the range of.
3. electrode assemblie as claimed in claim 1, wherein the strip barrier film is to be selected from lead titanate-zirconate（PZT), zirconium metatitanic acid
Lead lanthanum (PLZT), Pb (Mg3Nb2/3)O3-PbTiO3(P]MN-PT)、BaTi03, hafnium oxide (HfO2)、SrTiO3、TiO2、Al2O3、
ZrO2、SnO2、CeO2, MgO, CaO, ZnO and Y2O3In one or more materials.
4.-kind it is used for medium-sized and the battery module or battery pack of the power supply of large-scale plant, the battery module or battery pack include
The lithium secondary battery of at least two electrical connections.
5. the battery module or battery pack of claim 4, wherein described medium-sized and large-scale plant is：Electric tool；Including electronic vapour
Car, hybrid electric vehicle（) and plug-in hybrid electric vehicle ffiV（PffiV electric vehicle)（EV);Including electric bicycle
With the electric two-wheel vehicle of Electric Scooter；Electric golf cart；Electric truck；Electric commercial vehicle；Or electric power storage system
System.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610572989.2A CN107645018A (en) | 2016-07-20 | 2016-07-20 | A kind of electrode assemblie |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610572989.2A CN107645018A (en) | 2016-07-20 | 2016-07-20 | A kind of electrode assemblie |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107645018A true CN107645018A (en) | 2018-01-30 |
Family
ID=61108877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610572989.2A Pending CN107645018A (en) | 2016-07-20 | 2016-07-20 | A kind of electrode assemblie |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107645018A (en) |
-
2016
- 2016-07-20 CN CN201610572989.2A patent/CN107645018A/en active Pending
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180130 |
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| WD01 | Invention patent application deemed withdrawn after publication |