CN105938889A - Battery cell, battery module, battery group and device comprising battery group - Google Patents
Battery cell, battery module, battery group and device comprising battery group Download PDFInfo
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- CN105938889A CN105938889A CN201610118324.4A CN201610118324A CN105938889A CN 105938889 A CN105938889 A CN 105938889A CN 201610118324 A CN201610118324 A CN 201610118324A CN 105938889 A CN105938889 A CN 105938889A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
- B60L50/64—Constructional details of batteries specially adapted for electric vehicles
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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
- H01M50/461—Separators, membranes or diaphragms characterised by their combination with electrodes with adhesive layers between electrodes and separators
-
- 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
-
- 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
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/202—Casings or frames around the primary casing of a single cell or a single battery
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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
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/247—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for portable devices, e.g. mobile phones, computers, hand tools or pacemakers
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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
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
-
- 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
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/443—Particulate material
-
- 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
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/446—Composite material consisting of a mixture of organic and inorganic materials
-
- 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
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/449—Separators, membranes or diaphragms characterised by the material having a layered structure
- H01M50/451—Separators, membranes or diaphragms characterised by the material having a layered structure comprising layers of only organic material and layers containing inorganic material
-
- 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
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/449—Separators, membranes or diaphragms characterised by the material having a layered structure
- H01M50/457—Separators, membranes or diaphragms characterised by the material having a layered structure comprising three or more layers
-
- 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
- H01M50/489—Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties
- H01M50/491—Porosity
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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
- 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
Abstract
The invention discloses a battery cell, a battery module, a battery group and a device comprising the battery group. The present invention relates to a battery cell having an electrode assembly embedded in a battery case, the electrode assembly comprising a cathode, an anode, and a separator interposed between the cathode and the anode, wherein the separator comprises a porous polymer substrate and an organic/inorganic porous coating layer formed on at least one surface of the porous polymer substrate, the organic/inorganic porous coating layer comprises inorganic particles comprising a mixture of a metal oxide and a metal hydroxide, and a mixture of a PVdF-HFP polymer binder ("PHFP high") having a high hexafluoropropylene (HFP) content and a PVdF-HFP polymer binder ("PHFP low") having a low HFP content, and the adhesive strength of the separator and the cathode or the anode is 15 gf/25 mm or more. The battery module comprises the battery cell which serves as an elementary battery. The battery group comprises the above battery module.
Description
Cross-Reference to Related Applications
This application claims the Korean Patent Shen submitted on March 5th, 2015 to Korean Intellectual Property Office
Please the priority of No.10-2015-0030848, the disclosure of this application is by way of reference with it
It is integrally incorporated herein.
Technical field
The present invention relates to include having the battery cell of the separator of the bonding force of enhancing.
Background technology
Along with mobile device technology sustainable development and the demand about it continue to increase, secondary electricity
Pond quickly increases as the demand of energy source.In these secondary cells, present high-energy-density
With running voltage, have long cycle life and have low self-discharge rate lithium secondary electricity
Pond is commercially available and is widely used.
But, such lithium secondary battery has and has problem in safety, and thus,
It is attempt to solve these problems.
Especially, when bonding force between electrode and separator is low, due to battery charging/
During electric discharge, the slip of separator and electrode may be short-circuited in-between the electrodes.In the case,
The electric current local flow of excess and thus generation heat.Therefore, battery may be lighted or explode.
Additionally, when bonding force is low, owing to the gap between electrode and electrode bending may make interface
Resistance may increase, thus causes safety issue.
Therefore, in order to solve the problem about safety, it is proposed that a kind of separator, Qi Zhongtong
Cross and the slurry including a large amount of inorganic particle and polymeric binder is coated in that to have multiple hole many
Porous coat is formed at least side of hole substrate.But, such separator also in
There is on now enough with electrode bonding forces problem, and thus, porous coat should be by thicker
Ground is formed to present enough bonding forces.In the case, all-in resistance increases and electrode assemblie
The volume of self increases, thus reduces capacity for volume.
Recently, new battery cell is needed according to the trend towards slim type or design
Type.
The battery list with new structure is manufactured in order to consider the design of device that battery applied
Body, the capacity of battery cell should be reduced or plant bulk should increase.
Therefore, in order to solve these problems, some prior aries are by being laminated various sizes of electricity
Pond monomer constitutes set of cells.But, owing to such set of cells has the battery cell of lamination,
So battery cell does not the most share electrochemical reaction so that the thickness of set of cells increases,
And thus, the capacity of battery is likely to reduced.Additionally, due to such design amendment, it is electrically connected
Connect and become complicated, and therefore, it is difficult to manufacture the battery cell meeting desired conditions.
Accordingly, there exist the needs developing following atypia battery cell, at atypia battery list
In body, the shape of electrode assemblie depends on the shape of the device that battery cell applied and changes.
In order to manufacture such battery cell, must be according to various shapes after laminated electrode and separator
Shape cutting separator.But, in the case, the bonding force between electrode and separator is low
Time, when cutting separator, separator slides, and therefore, it is difficult to accurately cuts separator.
Additionally, be as noted previously, as generation separator sliding phenomenon during cutting, in-between the electrodes
Short circuit be further exacerbated by.
Accordingly, there exist being come by the bonding force further enhancing between electrode and separator
Solve described problem battery cell in the urgent need to.
Summary of the invention
Technical problem
Therefore, the present invention is made to solve problem above Buddhist monk other technical problem unsolved.
As various further investigations and the result of various experiment, the present inventor confirms, when
When using following separator, wherein inorganic particle and porous organic and inorganic coat are formed on many
On at least side of pore polymer substrate, wherein inorganic particle includes metal-oxide and metallic hydrogen
Hopcalite, and porous organic and inorganic coat includes wherein hexafluoropropene (HFP)
PVdF-HFP polymeric binder (the P that content is highHFP high) with wherein hexafluoropropene (HFP)
PVdF-HFP polymeric binder (the P that content is lowHFP low) mixture, even if then when separate
When the porous organic and inorganic coat more unfertile land of thing is coated in porous polymer substrate, also present
The bonding force excellent with electrode and prevent the thermal contraction of separator, thus completes the present invention.
Technical solution
Therefore, include battery container according to the battery cell of the present invention, including anelectrode, negative electricity
Pole and the electrode assemblie of separator being placed between anelectrode and negative electrode are built in this battery case
In body, wherein,
Separator includes porous polymer substrate and is formed at least side of porous polymer substrate
On porous organic and inorganic coat,
Porous organic and inorganic coat include inorganic particle and wherein hexafluoropropene (HFP) contain
Measure high PVdF-HFP polymeric binder (PHFP high) with wherein hexafluoropropene (HFP)
PVdF-HFP polymeric binder (the P that content is lowHFP low) mixture, inorganic particle includes
Metal-oxide and the mixture of metal hydroxides, and
Bonding force between separator and anelectrode or negative electrode is 15gf/25mm or bigger.
Here, cross section based on porous polymer substrate can be by porous organic and inorganic coat
Be formed as the thickness of 0.5 micron to 5 microns, the in particular thickness of 1 micron to 3 microns.
When porous organic and inorganic coat thickness within the range time, battery cell inside electricity
Resistance does not increases and can preferably provide the thermal resistance to separator.Outside this range, when many
When the thickness of hole organic and inorganic coat is the thinnest, it is impossible to the thermal resistance to separator is provided and obtains
The bonding force of expected value or bigger.On the other hand, when porous organic and inorganic coat thickness too
Time thick, cumulative volume increases, and thus, reduce relative to the capacity of volume, in thus causing
Resistance.
As defined above, the present inventor confirms, is using the separation according to the present invention
During the electrode laminate of thing, i.e. in described separator, in porous polymer substrate at least
Have on side the mixture including metal-oxide and metal hydroxides inorganic particle and
Porous organic and inorganic coat, this porous organic and inorganic coat includes wherein hexafluoropropene
(HFP) the PVdF-HFP polymeric binder (P that content is highHFP high) with wherein hexafluoro third
PVdF-HFP polymeric binder (the P that alkene (HFP) content is lowHFP low) mixture, i.e.
Make when the thickness of porous organic and inorganic coat is thinly formed, between separator and electrode
Bonding force can increase to 15gf/25mm or bigger, and 15gf/25mm is extremely in particular
30gf/25mm, and therefore, it is possible to solve the sliding phenomenon of separator, thus strengthen battery list
The safety of body.
Additionally, metal-oxide and metal hydroxides are used together.As a result, granule has
Two kinds of different sizes, thus the encapsulation of per unit area is maximized.Therefore, it is possible to enter one
Step prevents the thermal contraction of separator.
In this manual, statement " PVdF-HFP polymeric binder " refer to include from
The component units of vinylidene fluoride (VdF) and the component units from hexafluoropropene (HFP)
Tetrafluoroethylene vinylidene fluoride copolymer.PVdF-HFP polymeric binder according to the present invention
Molecular weight can be 100000 to 1000000g/mol, in particular 200000 to
700000g/mol。
Additionally, in this manual, " P is statedHFP high" refer to the content phase of wherein HFP
To high PVdF-HFP polymeric binder.Especially, PHFP highBased on PHFP highWeight
The HFP of weight fraction 8% to 20% can be included, more particularly include weight fraction 12% to
The HFP of 20%.
Additionally, in this manual, " P is statedHFP low" refer to the content phase of wherein HFP
To low PVdF-HFP polymeric binder.Especially, PHFP lowCan wrap based on its weight
Include the HFP of weight fraction 3% to 15%, more particularly include the HFP of weight fraction 3% to 8%.
Certainly, according in the mixture of the present invention, PHFP highIn HFP content and PHFP low
In HFP content in the range of described, and PHFP highIn HFP content higher than PHFP low
In HFP content.Preferably, PHFP highIn HFP content compare PHFP lowIn HFP contain
Measure the weight fraction of high 5% or bigger.
Work as PHFP highAnd PHFP lowBetween HFP content difference less than 5% weight fraction time,
Increased by the desired bonding force that two kinds of PVdF-HFP polymeric binder type hybrid are obtained
Potent fruit, i.e. the bonding force of 15gf/25mm or bigger may not present.
PHFP highAnd PHFP lowCan be with the content of 1:3 to 1:20 than mixing based on its weight.
Outside this range, P is worked asHFP lowContent the lowest time, the aeration time of separator degenerates,
And therefore resistance increases, and thus battery performance becomes negatively affected.Work as PHFP lowContent too
Gao Shi, the bonding force between separator and electrode reduces, and thus, due to filling at battery
Sliding phenomenon when electricity/electric discharge or the cutting of separator is short-circuited in-between the electrodes.
And, except above-mentioned PVdF-HFP polymeric binder, porous organic and inorganic coat
Other organic polymeric binder can be included, as long as meeting the purpose of the present invention.Such as, may be used
To include or the mixture of more selected from following group, this group is by polyvinylidene fluoride-co-
Trichloro ethylene, polymethyl methacrylate, butyl polyacrylate, polyacrylonitrile, polyethylene pyrrole
Pyrrolidone, polyvinyl acetate, polyethylene-co-vinyl acetate, poly(ethylene oxide), polyarylate,
Cellulose acetate, cellulose acetate-butyrate, cellulose-acetate propionate, cyanoethyl pullulan,
Cyanoethyl polyvinylalcohol, cyanethyl cellulose, cyanoethyl sucrose, amylopectin and carboxymethyl are fine
Dimension element composition.Here, based on the polymeric binder being included in porous organic and inorganic coat
Gross weight, other polymeric binder of the amount of weight fraction 0 to 30% can be included.
Meanwhile, as other composition of formation porous organic and inorganic coat, inorganic particle is permissible
It it is the mixture of metal-oxide and metal hydroxides.Here, can be with every mole metal oxygen
The amount of compound 0.01mol to 0.3mol includes metal hydroxides.
Outside this range, when the content of metal hydroxides is less than every metal oxide
During 0.01mol, desired enough bonding forces of the present invention may not be obtained.
Metal-oxide and metal hydroxides can include identical metal or different metals,
The most identical one or more of metals.Here, metal is unrestricted, if permissible
Form solid oxide and hydroxide.Such as, metal can be one in following group
Or more, described group by Al, Ti, Sn, Ni, Mg, Ce, Sn, Sr, Pb, Si, Zn,
Zr, Ca and Ba form.Especially, when metal is Al, metal-oxide can be Al2O3
And metal hydroxides can be AlOOH.
The average diameter of the metal-oxide in inorganic particle can be 300 to 500 μm, and
The average diameter of the metal hydroxides in inorganic particle can be 150 to 400 μm.Wherein
Inorganic particle as above includes metal-oxide and the metal hydroxides with different-diameter
Time, the encapsulation of per unit area is maximized, and prevents the thermal contraction of separator the most further.
In order to obtain the effect according to the present invention, it is therefore preferable that include metal at inorganic particle
Oxide and metal hydroxides.
Can gross weight based on porous organic and inorganic coat include weight fraction 50% to
The inorganic particle of 95%, the in particular inorganic particle of weight fraction 60% to 95%.
Outside this scope, when including the inorganic particle less than weight fraction 50%, polymer
The content of binding agent excessively increases, and thus space between inorganic particle reduce.Therefore,
Hole dimension and porosity reduce, and thus, battery performance may be degenerated.When including more than weight
During the inorganic particle of amount mark 95%, the content of polymeric binder is the lowest and thus inorganic material
Bonding force between material reduces, and thus the mechanical performance of separator self may be degenerated.
As it has been described above, include the porous of inorganic particle and PVdF-HFP polymeric binder organic-
The structure of inorganic coat is unrestricted, but can be filled at inorganic particle and contact with each other
By bonding and there is between inorganic particle clearance body by organic polymeric binder under state
Long-pending.Here, the interstitial volume between inorganic particle represent by inorganic particle tightly packed (or
Dense accumulation) structure in due to substantial contact inorganic particle limit space.
Meanwhile, can use by using the solvent together with inorganic particle and polymeric binder to prepare
In the slurry of porous coat, and then, on the upper berth, at least side of porous polymer substrate
Exhibition dry slurry form porous organic and inorganic coat.Especially, it is possible to use by
The polymeric binder being dissolved in its good solvent (such as acetone) adds polymeric binder
The separated effect of poor solvent (such as, ethanol), and then by porous polymer
It is dried after the mixture that substrate upper berth spread becomes and forms porous coat.Typically, root
The porous organic and inorganic coat obtained according to such method has excellent profit in battery operated period
Moist and low-resistance advantage.On the other hand, porous organic and inorganic coat has in battery system
Expand and the shortcoming of bonding force reduction after such as during making.But, in the present invention,
The PVdF-HFP polymeric binder of mixing used as discussed above and the inorganic particle of mixing,
And thus, even if also presenting excellent bonding when porous organic and inorganic coat unfertile land is sprawled
Power.And, the encapsulation of per unit area is maximized, thus prevents the thermal contraction of separator.
Additionally, additive usually used in this field can be further added to be coated with for porous
The slurry of coating.Additive can be such as further enhancing scattered point of inorganic particle
Powder.Dispersant makes inorganic filler maintain uniform dispersity in binding resin, and
Can be selected from oil-soluble polyamine, oil-soluble amine compound, fatty acid, fatty alcohol and dehydration mountain
Pears alcohol fatty acid ester, particularly has any one in the polyamine amide carboxylic acid of high molecular.
The content of such dispersant inorganic particle based on 100 weight portions can be 1 to 10 weight portion.
When inorganic particles based on 100 weight portions include the dispersant less than the amount of 1 weight portion, nothing
Machine filler easily precipitates.On the other hand, include being more than when inorganic particles based on 100 weight portions
During the dispersant of the amount of 10 weight portions, porous organic and inorganic coat and porous polymer substrate
Bonding force reduces, or, when secondary cell manufactures, generate miscellaneous by reacting with electrolyte
Matter.
Meanwhile, the porous polymer substrate used in the present invention can be by various polymer shapes
The perforated membrane become, or the nonwoven that plate-like porous polymeric substrates such as generally uses in the battery
Fabric.It is, for example possible to use be typically used as the polyolefin-based many of separator in the lithium secondary battery
Pore membrane, the adhesive-bonded fabric etc. being made up of pet fiber.Porous polymer
Texture or shape can depend on use object and change.
Can by use such as polyethylene such as high density polyethylene (HDPE), linear low density polyethylene,
Low Density Polyethylene or ultra-high molecular weight polyethylene and polyolefin based polymer such as polypropylene, poly-
Butylene or the most poly-penta or its mixture Polyolefin-based porous film is formed as polymer.Also may be used
By using polyolefin based polymer or there is than polyolefin based polymer the polymerization of higher thermal resistance
Adhesive-bonded fabric is prepared as fiber by thing.
The thickness of porous polymer substrate be not particularly limited and can be 1 μm to 100 μm,
5 μm are to 50 μm in particular.Additionally, there are hole in porous polymer substrate size and
Porosity is not particularly limited.Porosity is preferably 10% to 95%, and hole dimension is (straight
Footpath) it is preferably 0.1 μm to 50 μm.When being smaller in size than 0.1 μm and porosity less than 10%
Time, porous polymer substrate can serve as resistive layer.When size is big more than 50 μm and porosity
In 95% time, it is difficult to maintain mechanical performance.
As it has been described above, separator prepared in accordance with the present invention is placed between anelectrode and negative electrode,
And present enough bonding forces.It is therefore prevented that the slip of separator, and thus, can
To prevent the short circuit between anelectrode and negative electrode.
Therefore, the battery cell including the separator according to the present invention is not particularly limited and can
To be applied to all of battery cell shape and type.But, when farther including separator
When cutting process is to manufacture atypia battery cell as above, between electrode and separator
Bonding force weak time separator slide when separator cutting process, and thus be difficult to accurately cut
Cut.Additionally, due to the slip of the separator occurred during Qie Ge, between anelectrode and negative electrode
Short circuit deteriorate further.Therefore, separator is by more preferred with at atypia battery cell
In.
Especially, can have relative to dashing forward at electrode terminal according to the battery cell of the present invention
On outgoing direction through battery cell center line (longitudinal centre line) dissymmetrical structure or
Relative to extending perpendicularly through the line at center of battery cell on the projected direction of electrode terminal
The dissymmetrical structure of (horizontal center line), or the inside of battery cell can run through and have aperture.
Alternatively, the battery cell according to the present invention can be relative to longitudinal centre line and horizontal center line
The most asymmetric.
In order to easy to understand, Fig. 1 to 7 shows have said structure according to the present invention's
The example of battery cell.But, the invention is not restricted to this.
Meanwhile, battery cell can be secondary cell, in particular lithium secondary battery such as lithium gold
Belong to secondary cell, lithium rechargeable battery, lighium polymer secondary battery or lithium ion polymer two
Primary cell.
Other composition of battery cell according to the present invention is described below.
Can be by the mixture of active positive electrode material, conductive material and binding agent be spread over
On anelectrode current collector, and then it is dried and manufactures anelectrode.As required,
This mixture may further include filler.
Active positive electrode material includes that two or more transition metal such as lithium transition-metal aoxidizes
Thing, and can be such as that layered compound such as substitutes with one or more of transition metal
Lithium and cobalt oxides (LiCoO2), lithium nickel oxide (LiNiO2) etc.；With one or more of
The lithium manganese oxide that transition metal substitutes；By molecular formula LiNi1-yMyO2(wherein M include Co,
At least one in Mn, Al, Cu, Fe, Mg, B, Cr, Zn and Ga, and 0.01≤y≤0.7)
The lithium nickel-based oxide represented；By molecular formula Li1+zNibMncCo1-(b+c+d)MdO(2-e)Ae(wherein
-0.5≤z≤0.5,0.1≤b≤0.8,0.1≤c≤0.8,0≤d≤0.2,0≤e≤0.2 and b+c+d < 1,
M is Al, Mg, Cr, Ti, Si or Y, and A is F, P or Cl) such as
Li1+zNi1/3Co1/3Mn1/3O2、Li1+zNi0.4Mn0.4Co0.2O2Lithium nickel cobalt manganese composite oxygen Deng expression
Compound；By chemical formula Li1+xM1-yM'yPO4-zXz(wherein M is transition metal, preferably
Fe, Mn, Co or Ni, M' is Al, Mg or Ti, and X is F, S or N ,-0.5≤x≤+ 0.5,
0≤y≤0.5 and 0≤z≤0.1) the Fructus Canarii albi ground mass lithium metal phosphates that represents；Like this, but
The invention is not restricted to this.
Positive electrode collector is typically made into the thickness of 3 μm to 500 μm.Positive electrode collector is not
It is particularly limited, as long as it does not cause chemical change in manufactured secondary cell and has
High conductivity.Such as, positive electrode collector can be by rustless steel, aluminum, nickel, titanium, sintering carbon
Or carry out surface-treated aluminum or rustless steel etc. with carbon, nickel, titanium, silver.Positive electrode collector
Tiny concaveconvex shape can be had to increase active positive electrode material and anelectrode in its surface
Bonding force between current collector.Furthermore, it is possible to include in a variety of forms film, sheet, paper tinsel,
Any one in net, loose structure, foam and adhesive-bonded fabric uses positive electrode collector.
It is commonly angled relative to include the gross weight of the mixture of active positive electrode material with 1wt% extremely
The amount of 50wt% adds conductive material.Conductive material is not particularly limited, as long as it is made
The secondary cell made does not causes chemical change and there is high conductivity.The example of conductive material
The most natural or the Delanium including graphite；White carbon black such as white carbon black, acetylene black, Ketjen black, groove
Black, furnace black, dim and thermal black；Conductive fiber such as carbon fiber and metallic fiber；Metal powder
Such as it is fluorinated carbon dust, aluminium powder and nikel powder；Electric conductivity whisker such as zinc oxide and potassium titanate；Conduction
Property metal-oxide such as titanium oxide；And polyphenylene derivant.
Bonding that binding agent is to aid between active material and conductive material and electrode active material
Component to the bonding of electrode current collector.It is commonly angled relative to include the mixing of active positive electrode material
The gross weight of thing adds binding agent with the amount of 1wt% to 50wt%.The example of binding agent includes poly-inclined
Difluoroethylene, polyvinyl alcohol, carboxymethyl cellulose (CMC), starch, hydroxypropyl cellulose,
Regenerated cellulose, polyvinylpyrrolidone, tetrafluoroethene, polyethylene, polypropylene, ethylene-the third
Alkene-diene terpolymer (EPDM), the EPDM of sulfonation, SBR styrene butadiene rubbers,
Fluorubber and various copolymer.
The component that filler optionally is used as suppressing anelectrode to expand.Filler is not particularly limited,
As long as it is the fibrous material not causing chemical change in manufactured battery.The example of filler
Including olefin-based polymer such as polyethylene and polypropylene；And fibrous material such as glass fibre
And carbon fiber.
By negative electrode active material is coated on negative electrode current collector, it is dried and extruding
Manufacture negative electrode, and as required, can optionally farther include conductive material,
Binding agent, filler etc..
Negative electrode active material according to the present invention can be that such as carbon and graphite material is the most natural
Graphite, Delanium, expansible graphite, carbon fiber, hard carbon, white carbon black, CNT, richness
Strangle alkene and activated carbon；Can with the metal of lithium alloyage such as Al, Si, Sn, Ag, Bi, Mg,
Zn, In, Ge, Pb, Pd, Pt and Ti and include the compound of these elements；Metal and it
The complex of compound and the complex of carbon and graphite material；And the nitride Han lithium.
Wherein, carbon-based active material, silicon-based active material, tin-based active material or silico-carbo base activity material
Material is it is furthermore preferred that and can be used alone or with two of which or the form of more combination
Use.
Negative electrode current collector is typically manufactured to 3 μm thickness to 500 μm.Negative electrode current collection
Device is not particularly limited, if it does not cause in manufactured secondary cell chemical change and
There is high conductivity.Such as, negative electrode current collector can by copper, rustless steel, aluminum, nickel, titanium,
Sinter carbon, carry out surface-treated copper or rustless steel etc. with carbon, nickel, titanium or silver.With positive electricity
Pole current collector be similar to, negative electrode current collector can have in its surface tiny concaveconvex shape with
Strengthen the bonding force between negative electrode active material and negative electrode current collector.Furthermore, it is possible to respectively
The form planting various kinds includes in film, sheet, paper tinsel, net, loose structure, foam and adhesive-bonded fabric
Any one uses negative electrode current collector.
Meanwhile, the electricity of the electrode assemblie including anelectrode, negative electrode and separator wherein it is embedded with
Pond housing can be the pouch type battery housing being made up of laminate, and laminate includes being gathered by weatherability
External skin, the inner containment layer being made up of hot-melt polymer that compound is constituted and outside being placed in
Barrier layer between portion's coating and inner containment layer.Especially, the barrier layer of pouch-shaped battery case
Can be made up of aluminum (Al) laminate.
Additionally, in addition to electrode assemblie, the battery cell according to the present invention can also be further
Including the nonaqueous electrolytic solution containing lithium salts.Especially, can have according to the battery cell of the present invention
Wherein by the structure of the nonaqueous electrolytic solution impregnated electrode assembly containing lithium salts.
Nonaqueous electrolytic solution containing lithium salts is made up of nonaqueous electrolytic solution and lithium salts, and nonaqueous electrolytic solution
Example include non-aqueous organic solvent, organic solid electrolyte, inorganic solid electrolyte etc., but
The invention is not restricted to this.
The example of non-aqueous organic solvent includes non-proton organic solvent such as N-methyl-2-pyrrolidine
Ketone, Allyl carbonate, ethylene carbonate, butylene carbonate, dimethyl carbonate, carbonic acid diethyl
Ester, gamma-butyrolacton, 1,2-dimethoxy-ethane, oxolane, 2-methyltetrahydrofuran, diformazan
Sulfoxide, 11,3-dioxolanes, Methanamide, dimethylformamide, dioxolanes, acetonitrile, nitre
Methylmethane, methyl formate, methyl acetate, phosphotriester, trimethoxy-methane, dioxolanes
Derivant, sulfolane, methyl sulfolane, 1,3-dimethyl-2-imidazolidinone, propylene carbonate spread out
Biology, tetrahydrofuran derivatives, ether, methyl propionate, ethyl propionate etc..
The example of organic solid electrolyte includes but not limited to polythene derivative, poly(ethylene oxide)
Derivant, poly propylene oxide derivative, phosphate ester polymer, poly-stirring lysine, polyester sulfur
Compound, polyvinyl alcohol, polyvinylidene fluoride and the polymer containing ionic dissociation groups.
The example of inorganic solid electrolyte includes but not limited to the nitride of lithium (Li), halogenide
With sulfate such as Li3N、LiI、Li5NI2、Li3N-LiI-LiOH、LiSiO4、
LiSiO4-LiI-LiOH、Li2SiS3、Li4SiO4、Li4SiO4-LiI-LiOH、Li3PO4-Li2S-SiS2。
Lithium salts is a kind of material being easily dissolved in nonaqueous electrolytic solution and its example includes but not
It is limited to LiCl, LiBr, LiI, LiClO4、LiBF4、LiB10Cl10、LiPF6、LiCF3SO3、
LiCF3CO2、LiAsF6、LiSbF6、LiAlCl4、CH3SO3Li、(CF3SO2)2NLi, chlorine
Borine lithium, lower alphatic carboxylic acid lithium, tetraphenylboronic acid lithium and amide.
Additionally, in order to improve charge/discharge characteristics and fire resistance, example can be added to electrolyte
As pyridine, NSC 5284, triethanolamine, cyclic ethers, ethylenediamine, positive glyme,
Six phosphoric triamides, nitrobenzene derivative, sulfur, quinoneimine dye, N-substituted oxazoline alkanone, N, N-
Substituted imidazole alkane, glycol dialkyl ether, ammonium salt, pyrroles, 2-methyl cellosolve, aluminum chloride.
If it is required, in order to give incombustibility, it is all that electrolyte can farther include halogen-containing solvent
Such as carbon tetrachloride and trifluoro-ethylene.And, in order to strengthen high-temperature storage characteristics, electrolyte can enter
One step include carbon dioxide, fluorine ethylene carbonate (FEC), propene sultone (PRS),
Fluorine Allyl carbonate (FPC) etc..
In a preferred embodiment, can be by including as high dielectric solvent and cyclic carbonate
EC or PC of ester and as low viscosity solvent and DEC, DMC or EMC of linear carbonate
Mixed solvent add lithium salts such as LiPF6,LiClO4,LiBF4Or LiN (SO2CF3)2Prepare
Nonaqueous electrolytic solution containing lithium salts.
Additionally, the invention provides a kind of include battery cell as element cell battery module,
A kind of set of cells including this battery module and a kind of device including this set of cells.
The particular example of device includes electric vehicle and electrical storage device, described electric vehicle and electric power storage
Device include mobile phone, portable computer, smart phone, tablet personal computer (PC),
Intelligent flat, netbook computer, wearable device, lightweight electric powered vehicles (LEV), electronic
Vehicle (EV), hybrid electric vehicle (HEV), plug-in hybrid electric vehicle (PHEV)
Deng.
Battery module and the structure of set of cells and manufacture method, and the structure of device and manufacturer
Method is well known in the present art, and thus, omit it and describe in detail.
Accompanying drawing explanation
Fig. 1 is to illustrate the center relative to passing battery cell on the projected direction of electrode terminal
Line (longitudinal centre line) be upward through electricity with in the side vertical with the projected direction of electrode terminal
The line (horizontal center line) at the center of pond monomer has the irregular battery cell of dissymmetrical structure
The view of example；
Fig. 2 is to illustrate to be upward through electricity relative in the side vertical with the projected direction of electrode terminal
The line (horizontal center line) at the center of pond monomer has the irregular battery cell of dissymmetrical structure
The view of example, wherein the lower limb of separator is cut；
Fig. 3 is to illustrate the center relative to passing battery cell on the projected direction of electrode terminal
Line (longitudinal centre line) there is the view of example of irregular battery cell of dissymmetrical structure；
Fig. 4 is to illustrate to be upward through electricity relative in the side vertical with the projected direction of electrode terminal
The line (horizontal center line) at the center of pond monomer has the irregular battery cell of dissymmetrical structure
The view of another example；
Fig. 5 is to illustrate to be upward through electricity relative in the side vertical with the projected direction of electrode terminal
The line (horizontal center line) at the center of pond monomer has the irregular battery cell of dissymmetrical structure
The view of another example；
Fig. 6 is to illustrate the center relative to passing battery cell on the projected direction of electrode terminal
Line (longitudinal centre line) be upward through electricity with in the side vertical with the projected direction of electrode terminal
The line (horizontal center line) at the center of pond monomer has the irregular battery cell of dissymmetrical structure
The view of another example；And
Fig. 7 is to illustrate the center relative to passing battery cell on the projected direction of electrode terminal
Line (longitudinal centre line) be upward through electricity with in the side vertical with the projected direction of electrode terminal
The line (horizontal center line) at the center of pond monomer has the irregular battery cell of dissymmetrical structure
The view of another example.
Detailed description of the invention
Now, the present invention will be more fully described with reference to the example below.These examples are only provided
For the explanation of the present invention and be understood not to limit scope and spirit of the present invention.
<manufacturing example 1>
In order to manufacture polymer bonding agent solution, prepare with the weight ratio of 1:7.5 and include weight fraction
The PVdF-HFP polymeric binder (" HFP18 ") of the HFP of 18% and include weight fraction
The PVdF-HFP polymeric binder (" HFP5 ") of the HFP of 5%, and acetone is being added
Under the state of polymeric binder, polymeric binder is made to dissolve about 12 hours at 50 DEG C.
Al2O3Powder and ALOOH powder are mutually mixed with the molecular proportion of 1:0.1 as inorganic particle, and
Add this mixture to polymer bonding agent solution so that polymeric binder is to inorganic particle
Weight ratio be 10:90.The polymer of cyanoethyl polyvinylalcohol based on weight fraction 2% is glued
Knot agent solution adds polymer bonding agent solution to, and uses ball-milling method to be crushed by inorganic particle
With the organic-inorganic porous slurry that dispersion is used for coating for 12 hours with manufacture.Use deep cladding process
The organic-inorganic porous slurry being used for coating is applied to by (deep coating method) to be had
9 μ m thick are as the contrary surface of the polyolefin porous membrane of substrate so that for having of coating
Machine-inorganic porous slurry has the thickness of 2.5 μm, and be then dried at 70 DEG C in stove with
Manufacture separator.
<example 1>
LiCoO as 90 weight portions of active positive electrode material2, as the 5 of conductive material
The acetylene black of weight portion and the PVDF as the weight fraction 5% of binding agent are mixed and add
To NMP (METHYLPYRROLIDONE) to manufacture anelectrode slurry.Anelectrode slurry is applied in
To aluminum (Al) current collector and be then dried to manufacture anelectrode.
As negative electrode active material 95 weight portions graphite and as 5 weight portions of binding agent
SBR be added to distilled water to manufacture negative electrode slurry.Negative electrode slurry is applied to copper
(Cu) current collector and be then dried to manufacture negative electrode.
LiPF6It is dissolved in anhydrous solvent and makes LiPF6Concentration be 1M, this anhydrous solvent
Including the ethylene carbonate (EC) mixed with the ratio of 1:2 and Ethyl methyl carbonate (EMC),
And as polymerization initiator, the trimethylolpropane trimethacrylate of 5 weight portions and 0.15
The benzoyl peroxide (BPO) of weight portion is added to the solution of 100 weight portions to manufacture electrolysis
Liquid compositions.
According to manufacture the separator that example 1 manufactures be respectively placed on multiple anelectrode and negative electrode it
Between so that anelectrode, negative electrode and separator are stacked as having anelectrode/separator/negative electrode
/ separator/anelectrode/separator/negative electrode structure is to manufacture electrode assemblie.Electrolyte composition quilt
It is injected in electrode assemblie, and under electrode assemblie is wrapped state under vacuo wherein,
Electrode assemblie is at room temperature placed 15 hours.Subsequently, electrode assemblie is polymerized at 80 DEG C 4
Hour to manufacture battery cell.
<example 2>
In addition to preparing HFP18 and HFP5 with the weight ratio of 0.5:7.0, with manufacture example
1 identical mode manufactures separator.Additionally, except use the separator that manufactures according to this example it
Outward, in the way of identical with example 1, battery cell is manufactured.
<example 3>
In addition to preparing HFP18 and HFP5 with the weight ratio of 2.0:6.0, with manufacture example
1 identical mode manufactures separator.Additionally, except use the separator that manufactures according to this example it
Outward, in the way of identical with example 1, battery cell is manufactured.
<comparative example 1>
In addition to preparing HFP18 and HFP5 with the weight ratio of 0:8.5, with manufacture example 1
Identical mode manufactures separator.Additionally, the separation manufactured according to this comparative example except use
Outside thing, in the way of identical with example 1, manufacture battery cell.
<comparative example 2>
In addition to preparing HFP18 and HFP5 with the weight ratio of 8.5:0, with manufacture example 1
Identical mode manufactures separator.Additionally, the separation manufactured according to this comparative example except use
Outside thing, in the way of identical with example 1, manufacture battery cell.
<comparative example 3>
Except the polyolefin porous membrane with 14 μ m thick is used as in addition to separator, with show
The mode that example 1 is identical manufactures battery cell.
<experimental example 1>
Strong according to example 1 to 3 and the thickness of the separator of comparative example 1 to 3 manufacture and bonding
Degree is manufactured.Result is as shown in table 1.For the bonding strength of separator, manufacture and just had
The unit cell of electrode/separator/negative electrode structure, and use stretching strength measurement apparatus measures
The bonding strength of separator in unit cell.
[table 1]
With reference to table 1, it can be seen that at PHFP highContent low time separator bonding strength reduce,
And according to not containing PHFP highAnd/or PHFP lowComparative example 1 and 2 manufacture separator
Ratio is containing PHFP highAnd PHFP lowBoth separators have lower bonding strength.
<experimental example 2>
In order to check how many separators when cutting separator to slide, the lower limb of separator is cut
Cut so that forming the battery manufactured according to example 1 and comparative example 1,2 and 3 as shown in Figure 2
The electrode of monomer, and then check the ratio of defects of separator.Result is as shown in table 2.Based on
10 battery cells check the ratio of defects of separator, make positive electricity to determine owing to separator slides
Whether do not have separator between pole and negative electrode inserts it may happen that short circuit.
[table 2]
| Defect counts | |
| Example 1 | 0 |
| Comparative example 1 | 2 |
| Comparative example 2 | 3 |
| Comparative example 3 | 8 |
With reference to table 2, it can be seen that the ratio of defects of the battery cell manufactured according to example 1 is 0%,
The ratio of defects of the battery cell according to comparative example 1 and 2 manufacture is about 10 to 30%, and root
The ratio of defects of battery cell manufactured according to comparative example 3 is about 80%, and this discloses and shows according to comparing
The separator that example 1,2 and 3 manufactures has low bonding strength, causes the separator can not be the most attached
Receive electrode.
Although referring to the drawings and experimental data describes the exemplary embodiment of the present invention, but
It is to it will be understood by those skilled in the art that the model without departing substantially from the invention disclosed in claims
Enclose with spirit in the case of, various amendments, to increase and substitute be possible.
Industrial applicibility
As it has been described above, include the following separator used according to the battery cell of the present invention, its
Middle inorganic particle and porous organic and inorganic coat are formed at least side of porous polymer substrate
On, wherein inorganic particle includes the mixture of metal-oxide and metal hydroxides, and many
Hole organic and inorganic coat includes that the PVdF-HFP that wherein hexafluoropropene (HFP) content is high gathers
Compound binding agent (PHFP high) PVdF-HFP low with wherein hexafluoropropene (HFP) content
Polymeric binder (PHFP low) mixture, and thus, even if when the porous of separator
When organic and inorganic coat more unfertile land is coated in porous polymer substrate, also can present and electrode
Excellent bonding force.Therefore, can effectively prevent according to charge/discharge short circuit in-between the electrodes,
It is possible to prevent the thermal contraction of separator, and separator can be manufactured by more unfertile land, thus have all
Such as high power capacity and the battery performance of density and the safety improving battery.
It is additionally, since separator and there is bonding force sufficient with electrode, so manufacturing wherein electricity
The shape of pole assembly self depend on the shape of device and change atypia battery cell time,
The slip being possible to prevent separator during separator cutting process according to various device shapes is existing
As, and thus, more accurate cutting is possible, and prevented also from due to sliding phenomenon
The short circuit in-between the electrodes caused, thus further enhances the safety of battery cell.
Claims (23)
1. a battery cell, described battery cell includes battery container, at described battery container
In be built-in with electrode assemblie, described electrode assemblie includes anelectrode, negative electrode and is arranged in institute
State the separator between anelectrode and described negative electrode, wherein,
Described separator includes porous polymer substrate and is formed at described porous polymer substrate
At least porous organic and inorganic coat on side,
Described porous organic and inorganic coat includes: inorganic particle, and described inorganic particle includes gold
Belong to oxide and the mixture of metal hydroxides；And wherein hexafluoropropene content is high
PVdF-HFP polymeric binder PHFP highThe PVdF-HFP low with wherein hexafluoropropene content
Polymeric binder PHFP lowMixture, and
Bonding force between described separator and described anelectrode or described negative electrode is
15gf/25mm or bigger.
Battery cell the most according to claim 1, wherein, based on described PVdF-HFP
Polymeric binder PHFP highWeight, described PVdF-HFP polymeric binder PHFP high
Hexafluoropropene including weight fraction 8% to 20%.
Battery cell the most according to claim 1, wherein, based on described PVdF-HFP
Polymeric binder PHFP lowWeight, described PVdF-HFP polymeric binder PHFP lowBag
Include the hexafluoropropene of weight fraction 3% to 15%.
Battery cell the most according to claim 1, wherein, described PVdF-HFP is polymerized
Thing binding agent PHFP highWith described PVdF-HFP polymeric binder PHFP lowBetween hexafluoro third
Alkene content difference weight based on every kind of polymeric binder is the weight fraction of 5% or bigger.
Battery cell the most according to claim 1, wherein, described PVdF-HFP is polymerized
Thing binding agent PHFP highWith described PVdF-HFP polymeric binder PHFP lowBased on its weight with
The content of 1:3 to 1:20 is than mixing.
Battery cell the most according to claim 1, wherein, described metal-oxide and institute
State metal hydroxides and include identical metal types.
Battery cell the most according to claim 6, wherein, described metal is selected from as follows
One or more of in group: Al, Ti, Sn, Ni, Mg, Ce, Sn, Sr, Pb, Si,
Zn, Zr, Ca and Ba.
Battery cell the most according to claim 6, wherein, described metal-oxide is
Al2O3, and described metal hydroxides is AlOOH.
Battery cell the most according to claim 1, wherein, based on described porous organic-
The gross weight of inorganic coat includes described inorganic particle with the amount of weight fraction 50% to 95%.
Battery cell the most according to claim 1, wherein, based on described porous polymeric
Described porous organic and inorganic coat is formed as 0.5 micron to 5 microns by the cross section of thing substrate
Thickness.
11. battery cells according to claim 1, wherein, described porous polymer matrix
The end is Polyolefin-based porous film or the on-woven being made up of pet fiber
Thing.
12. battery cells according to claim 1, wherein, described separator is with described
Bonding force between anelectrode or described negative electrode is 15gf/25mm to 30gf/25mm.
13. battery cells according to claim 1, wherein, described battery cell is relative
Longitudinal centre line tool in the center passing described battery cell on the projected direction of electrode terminal
There is dissymmetrical structure.
14. battery cells according to claim 1, wherein, described battery cell is relative
Horizontal centre in the center extending perpendicularly through described battery cell with the projected direction of electrode terminal
Line has dissymmetrical structure.
15. battery cells according to claim 1, wherein, described battery cell interior
Portion is run through aperture.
16. battery cells according to claim 1, wherein, described battery cell is lithium
Secondary cell.
17. 1 kinds of battery modules, according to claim 1 including as element cell
Battery cell.
18. 1 kinds of set of cells, including battery module according to claim 17.
19. 1 kinds of devices including set of cells according to claim 18.
20. devices according to claim 19, wherein, described device is selected from following group:
Mobile phone, portable computer, tablet personal computer, Intelligent flat, net book calculate
Machine, wearable device, lightweight electric powered vehicles, electric vehicle, hybrid electric vehicle, insert
Electric-type hybrid electric vehicle and electrical storage device.
21. 1 kinds of battery cells, including:
Battery container；
Electrode assemblie, described electrode assemblie include anelectrode, negative electrode and be arranged in described just
Separator between electrode and described negative electrode, described electrode assemblie is built in described housing,
Wherein,
Described separator includes porous polymer substrate and is formed at described porous polymer substrate
At least porous organic and inorganic coat on side, and
Wherein, described battery cell is relative to passing described electricity on the projected direction of electrode terminal
The longitudinal centre line at the center of pond monomer has dissymmetrical structure, or described battery cell is relative
Horizontal centre in the center extending perpendicularly through described battery cell with the projected direction of electrode terminal
Line has dissymmetrical structure.
22. battery cells according to claim 21, wherein, described battery cell is relative
Longitudinal centre line tool in the center passing described battery cell on the projected direction of electrode terminal
There is dissymmetrical structure.
23. battery cells according to claim 21, wherein, described battery cell is relative
Horizontal centre in the center extending perpendicularly through described battery cell with the projected direction of electrode terminal
Line has dissymmetrical structure.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20150030848 | 2015-03-05 | ||
| KR10-2015-0030848 | 2015-03-05 |
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| CN201620160614.0U Active CN205406621U (en) | 2015-03-05 | 2016-03-02 | Battery monomer |
| CN201610118324.4A Pending CN105938889A (en) | 2015-03-05 | 2016-03-02 | Battery cell, battery module, battery group and device comprising battery group |
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| CN201620160614.0U Active CN205406621U (en) | 2015-03-05 | 2016-03-02 | Battery monomer |
Country Status (3)
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| KR (1) | KR20160108116A (en) |
| CN (2) | CN205406621U (en) |
| WO (1) | WO2016140454A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| HUE064825T2 (en) | 2017-02-13 | 2024-04-28 | Lg Energy Solution Ltd | Separation film for lithium secondary battery having adhesive layer |
| EP3605655B1 (en) * | 2017-09-29 | 2021-08-04 | Toray Industries, Inc. | Porous composite film, separator for battery, battery, and porous composite film production method |
| WO2019078649A1 (en) * | 2017-10-20 | 2019-04-25 | 주식회사 엘지화학 | Electrode assembly and electrochemical device comprising electrode assembly |
| KR102270120B1 (en) * | 2017-12-01 | 2021-06-28 | 주식회사 엘지에너지솔루션 | Electrode and electrode-assembly |
| WO2019108017A1 (en) | 2017-12-01 | 2019-06-06 | 주식회사 엘지화학 | Electrode and electrode assembly |
| KR102419160B1 (en) | 2019-05-09 | 2022-07-08 | 주식회사 엘지에너지솔루션 | Separator for secondary battery comprising dispersing agent and manufacturing method thereof |
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| CN101002347A (en) * | 2004-09-02 | 2007-07-18 | 株式会社Lg化学 | Organic/inorganic composite porous film and electrochemical device prepared thereby |
| CN101662041A (en) * | 2008-08-29 | 2010-03-03 | 深圳市比克电池有限公司 | Method for preparing gel polymer lithium ion battery |
| CN102623658A (en) * | 2012-03-12 | 2012-08-01 | 宁德新能源科技有限公司 | Diaphragm and preparation method thereof, and lithium ion battery |
| US20130224553A1 (en) * | 2012-02-29 | 2013-08-29 | Ki Chul HONG | Separator including coating layer and battery including the same |
| CN104377342A (en) * | 2013-08-14 | 2015-02-25 | 三星Sdi株式会社 | Negative electrode for rechargeable lithium battery and rechargeable lithium battery including the same |
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|---|---|---|---|---|
| JP5286844B2 (en) * | 2007-03-23 | 2013-09-11 | 住友化学株式会社 | Separator |
| KR101515357B1 (en) * | 2012-02-29 | 2015-04-28 | 제일모직주식회사 | Separator containing mixture coating layer of inorganics and organics, and battery using the separator |
| KR20130105271A (en) * | 2012-03-16 | 2013-09-25 | 주식회사 엘지화학 | Battery cell of asymmetric structure and battery pack employed with the same |
| KR101662638B1 (en) * | 2012-10-22 | 2016-10-05 | 주식회사 엘지화학 | Separator having binder layer, electrochemical device comprising the separator, and method of preparing the separator |
| JP6070421B2 (en) * | 2013-05-31 | 2017-02-01 | ソニー株式会社 | Batteries, battery packs, electronic devices, electric vehicles, power storage devices, and power systems |
-
2015
- 2015-11-17 KR KR1020150161110A patent/KR20160108116A/en unknown
-
2016
- 2016-02-23 WO PCT/KR2016/001737 patent/WO2016140454A1/en active Application Filing
- 2016-03-02 CN CN201620160614.0U patent/CN205406621U/en active Active
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Patent Citations (5)
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|---|---|---|---|---|
| CN101002347A (en) * | 2004-09-02 | 2007-07-18 | 株式会社Lg化学 | Organic/inorganic composite porous film and electrochemical device prepared thereby |
| CN101662041A (en) * | 2008-08-29 | 2010-03-03 | 深圳市比克电池有限公司 | Method for preparing gel polymer lithium ion battery |
| US20130224553A1 (en) * | 2012-02-29 | 2013-08-29 | Ki Chul HONG | Separator including coating layer and battery including the same |
| CN102623658A (en) * | 2012-03-12 | 2012-08-01 | 宁德新能源科技有限公司 | Diaphragm and preparation method thereof, and lithium ion battery |
| CN104377342A (en) * | 2013-08-14 | 2015-02-25 | 三星Sdi株式会社 | Negative electrode for rechargeable lithium battery and rechargeable lithium battery including the same |
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| Publication number | Publication date |
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| CN205406621U (en) | 2016-07-27 |
| KR20160108116A (en) | 2016-09-19 |
| WO2016140454A1 (en) | 2016-09-09 |
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