CN106848157A - A kind of electrode assemblie - Google Patents

A kind of electrode assemblie Download PDF

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Publication number
CN106848157A
CN106848157A CN201510884870.4A CN201510884870A CN106848157A CN 106848157 A CN106848157 A CN 106848157A CN 201510884870 A CN201510884870 A CN 201510884870A CN 106848157 A CN106848157 A CN 106848157A
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China
Prior art keywords
electrode assemblie
electric
barrier film
battery
electrode
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CN201510884870.4A
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Chinese (zh)
Inventor
唐忠相
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Individual
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Individual
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Priority to CN201510884870.4A priority Critical patent/CN106848157A/en
Publication of CN106848157A publication Critical patent/CN106848157A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/46—Separators, membranes or diaphragms characterised by their combination with electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H01M10/0583—Construction or manufacture of accumulators with folded construction elements except wound ones, i.e. folded positive or negative electrodes or separators, e.g. with "Z"-shaped electrodes or separators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Battery Electrode And Active Subsutance (AREA)
  • Secondary Cells (AREA)

Abstract

Embodiment of the present invention provides electrode assemblie, the electrode assemblie has the structure wound with the state that wherein the 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 the partition being stacked on the element cell with stacked structure has cladding covering material on one side thereof with the covering material and sheet type barrier film for coating on both sides.It improves the battery processability for preparing and the electrode assemblie with the battery life suitable with conventional batteries, and the lithium secondary battery comprising the electrode assemblie while initial resistance is reduced during the preparation of battery.

Description

A kind of electrode assemblie
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, the demand to secondary cell is also sharply increased.In the secondary battery, the lithium secondary battery with high-energy-density and working voltage and excellent preservation and life characteristics 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 as negative active core-shell 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 is moved between negative pole and positive pole.The lithium secondary battery must be basicly stable in the range of the working voltage of battery, 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 will be operated above with 3.6V is used as the power supply of portable electron device or multiple lithium secondary batteries is connected in series in high power motor vehicle driven by mixed power.Because the working voltage of lithium secondary battery is the three times of the working voltage of nickel-cadmium cell or ni-MH battery and the energy density characteristics of per unit weight are also excellent, so lithium secondary battery has the trend being widely used.In the lithium secondary battery, the bonding improved while security, high-temperature storage performance and the high temperature cyclic performance of monocell is kept to electrode can be coated with to polymer septum.However, this can cause the raising of battery initial resistance.
The content of the invention
The present invention provides a kind of electrode assemblie for improving the battery processability for preparing and having the battery life suitable with conventional batteries while initial resistance is reduced during the preparation of battery, and the lithium secondary battery comprising the electrode assemblie.
Embodiment of the present invention provides electrode assemblie, the electrode assemblie has the structure wound with the state that wherein the 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 the partition being stacked on the element cell with stacked structure has cladding covering material on one side thereof with the covering material and sheet type barrier film for coating on both sides.
Brief description of the drawings
Including accompanying drawing with provide it is of the invention further understand, the accompanying drawing is incorporated in this specification and the part of this specification is constituted.Accompanying drawing shows exemplary embodiment of the invention, and is used to explain principle of the invention together with specification.In the drawing：
Fig. 1 shows electrode assemblie of the invention.
Specific embodiment
Below with reference to the accompanying drawings the preferred embodiments of the invention are described in detail.However, the present invention can in different forms implement and should not be construed as being limited to embodiment specifically described herein.And be to provide these embodiments to cause present disclosure detailed and complete, and will fully convey the scope of the invention to those skilled in the art.
Lithium secondary battery the present invention relates to electrode assemblie 10 and comprising the electrode assemblie 10, the electrode assemblie 10 has the structure wound with the state that wherein the multiple element cells with stacked structure are arranged on sheet type barrier film 40, the electrode assemblie includes the element cell constructed with two or more electrode materials, the partition 30 being wherein stacked on the element cell with stacked structure has a cladding covering material on both sides and sheet type barrier film 40 has and is coated on its side (specifically, side with the multiple element cells being disposed thereon) on covering material.
Hereinafter, the present invention will be described in more detail.
Lithium secondary battery the present invention relates to electrode assemblie 10 and comprising the electrode assemblie 10, the electrode assemblie 10 has wherein to be the structure of the state winding that positive pole and negative pole are alternately stacked and are arranged in the multiple element cells with stacked structure on sheet type barrier film 40 by size multiple cell electrodes corresponding with the size of monocell respectively.
The partition 30 that is all wrapped by by using both sides is coated to the unit battery in electrode assemblie of the present invention 10.Its reason be can promote by electrode adhesion to partition 30 and can keep security while by property retention as former state.Thickness for coating the covering material of both sides can be in the range of about 0.001um~about 100um.When thickness is coated within the above range, the increase of cell thickness can be prevented and the reduced minimum of battery performance can be made.
Electrode assemblie of the invention 10 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 on sheet type barrier film 40, subsequent sequential volume is around being plate profile structure to generally form.
The double cell is the element cell with the identical electrodes being arranged on monocell both sides, such as cellular construction of the cellular construction of positive pole/partition/negative pole/partition/positive pole and negative pole/partition/positive pole/partition/negative pole.Include the electrochemistry single cell of secondary cell to be formed by using above-mentioned double cell, multiple double cells must be stacked, so that the double cell of the structure with positive pole/partition/negative pole/partition/positive pole and the double cell with negative pole/partition/positive pole/partition/negative pole structure are faced each other to be disposed with the state of barrier film 40 therebetween.Additionally, positive terminal 11 and negative terminal 12 project to the outside of unit battery.
In electrode assemblie of the invention 10, according to the type and thickness of cladding electrode material on the current collector, it may be determined that the construction of 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 positive electrode in being preferred embodiment in the electrode material with different configuration, in order to prepare electrode assemblie of the invention 10, can be constructed to the electrode assemblie 10 formed by first module battery 21 and second unit battery 22.
Generally, the capacity of secondary cell, life characteristic and high power charging-discharging characteristic may depend on the type and thickness of positive electrode active materials or negative active core-shell material.
Therefore, in the case of positive electrode in being preferred embodiment in the electrode material with different configuration, first module battery 21 can be included selected from one or more material in lithium and cobalt oxides, lithium manganese oxide and lithium nickel oxide, and second unit battery 22 can be included selected from one or more material in lithium manganese cobalt/cobalt oxide, lithium nickel manganese oxide, lithium nickel cobalt oxides and lithium manganese nickel cobalt oxide.
The partition 30 that is all wrapped by by using both sides is coated to the unit battery in electrode assemblie of the invention 10.Its reason be can promote by electrode adhesion to partition 30 and can keep security while by property retention as former state.Thickness for coating the covering material of both sides can be in the range of about 0.001~about 100.When thickness is coated within the above range, the reduced minimum of battery performance can be made while preventing cell thickness from increasing.
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 material.
Double cell can be used as the element cell with stacked structure.Its reason is that the huge advantage of the element cell with higher capacity can be that the double cell is used while the cell shapes of double cell are kept, and can also reduce the physical size deviation during the preparation process of battery.
To be wherein wound the state that the multiple element cells with stacked structure are arranged on sheet type barrier film 40 to electrode assemblie of the invention 10, and now, the length of sheet type barrier film 40 is not limited to the length that be can be used during the winding of monocell.
The barrier film 40 that will be coated on side is used as the sheet type barrier film during the folding of electrode assemblie of the invention 10.Using the piece type barrier film 40 of the covering material with cladding on one side thereof, the decline of cost thus can be realized.In addition, because the content of the covering material as insulator can decline as much as possible, it is possible to further improve the electrical conductivity and electrical property of battery, and multiple electrodes component 10 can be included, thus, it is possible to make the decline of the output that maximum capacity and can preventing causes by the partition 40 of battery.Thickness for coating the covering material of side can be in the range of about 0.001ym~about 100ym.When thickness is coated within the above range, battery performance can be kept intact while preventing cell thickness from increasing.
Specifically, can be selected from lead titanate-zirconate (PZT), lead lanthanum zirconate titanate (PLZT), Pb (Mg for coating the covering material of side3Nb2/3)O3-PbTiO3(P]MN-PT)、BaTiO3, hafnium oxide (HfO2)、SrTiO3、TiO2、Al2O3、ZrO2、SnO2、CeO2, MgO, CaO, ZnO and Y2O3In one or more material.
In sheet type barrier film 40, the side for being coated with covering material is the side with the multiple element cells being disposed thereon.Its reason be can promote by electrode adhesion to partition and can keep security while by property retention as former state.
Electrode assemblie of the invention 10 can be used for lithium secondary battery, and when electrically connecting and comprising two or more lithium secondary batteries, can use it for battery module or battery pack for medium-sized and large-scale plant power supply.Specifically, medium-sized and large-scale plant example can be electric tool；Electric vehicle (EV) including electric automobile, hybrid electric vehicle (ffiV) and plug-in hybrid electric vehicle (PffiV)；Electric two-wheel vehicle including electric bicycle and Electric Scooter；Electric golf cart；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 the lithium secondary battery that is formed by the electrode assemblie 10.
Hereinafter, will according to specific embodiment, the present invention is described in detail, but provide following examples be only used for illustrate 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, can in the present invention complete various variants and change.Thus it is intended that the present invention includes variant of the invention and change, as long as they are in the range of appended claims and its equivalent.
Embodiment 1
(preparing positive pole)
Slurry is prepared by the way that lithium and cobalt oxides, carbon black and polyvinylidene fluoride (PVDF) are dispersed in METHYLPYRROLIDONE (NMP) and then using the slurry both sides of aluminium foil is coated.Coated aluminium foil is fully dried and then by being suppressed coated aluminium foil positive pole is prepared.
(preparing negative pole)
Slurry is prepared by the way that graphite, acetylene black and PVDF are dispersed in NMP and then using the slurry both sides of Copper Foil is coated.Coated Copper Foil is fully dried and then by being suppressed coated Copper Foil negative pole is prepared.
(partition and barrier film)
The both sides of partition be coated with using PZT under the thickness of about 30um and prepare double cell, thereafter, by during 13 windings of double cell under the thickness of about 30um using the barrier film (using PLZT) being coated on side, be prepared for electrode assemblie.
Experimental example 2
1) initial resistance：By pressure drop when double rechargeable battery (SOC50) is discharged under constant current (50A), initial resistance is calculated, and compared with the monocell prepared by using typical method, resistance have dropped about 3%.
2) battery life：When battery life to be defined as the time of memory period resistance raising 30% wherein under constant high temperature, battery life is suitable with the life-span of the monocell prepared by using typical method.
As described above, can confirm, electrode assemblie of the invention improves the processability of battery preparation, while reducing initial resistance and having 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 anode unit and GND unit are respectively separated the both sides for being arranged on strip barrier film, are stacked by the way of folding.
2. electrode assemblie as claimed in claim 1, wherein the thickness of the sheet type barrier film is in the range of about 0.001ym about 100um.
3. electrode assemblie as claimed in claim 1, wherein the strip barrier film is selected from lead titanate-zirconate（PZT), lead lanthanum zirconate titanate (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 material.
4.-kind for medium-sized and large-scale plant power supply battery module or battery pack, the lithium secondary batteries of the battery module or battery pack comprising 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 electric automobile, hybrid electric vehicle（) and plug-in hybrid electric vehicle ffiV（PffiV electric vehicle)（EV);Electric two-wheel vehicle including electric bicycle and Electric Scooter；Electric golf cart；Electric truck；Electric commercial vehicle；Or power storage system.
CN201510884870.4A 2015-12-05 2015-12-05 A kind of electrode assemblie Withdrawn CN106848157A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510884870.4A CN106848157A (en) 2015-12-05 2015-12-05 A kind of electrode assemblie

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510884870.4A CN106848157A (en) 2015-12-05 2015-12-05 A kind of electrode assemblie

Publications (1)

Publication Number Publication Date
CN106848157A true CN106848157A (en) 2017-06-13

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Country Status (1)

Country Link
CN (1) CN106848157A (en)

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Application publication date: 20170613

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