CN208799783U - Electrode assembly, the secondary cell including it - Google Patents
Electrode assembly, the secondary cell including it Download PDFInfo
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- CN208799783U CN208799783U CN201690000754.XU CN201690000754U CN208799783U CN 208799783 U CN208799783 U CN 208799783U CN 201690000754 U CN201690000754 U CN 201690000754U CN 208799783 U CN208799783 U CN 208799783U
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Secondary Cells (AREA)
Abstract
It is low and high-power electrode assembly, the secondary cell including it can be embodied to provide a kind of impedance.The electrode assembly of the utility model includes: positive plate, has positive electrode collector, positive active material and anode ear；Negative plate has negative electrode collector, negative electrode active material and negative electrode lug；And partition, between the positive plate and the negative plate；At least certain one embodies the ear relative to the collector in both directions in the positive plate and negative plate, and the anode ear and the negative electrode lug constitute an angle of 90 degrees degree.According to the utility model, lead/collector constitutes in both directions relative at least certain one in each electrode, respectively on the basis of positive/negative, flows electric current in both directions, thus reduces cell impedance.
Description
Technical field
The present invention relates to secondary cell and for its electrode assembly, more specifically, be related to a kind of anode ear (tab),
The electrode assembly that negative electrode lug and the lead portion for being connected to them are improved and secondary cell and its manufacturer including it
Method.The application is as the priority master to Korean Patent Application No. the 10-2015-0124322nd filed on September 2nd, 2015
Application is opened, refers to all the elements disclosed in the specification accordingly applied and attached drawing in this application.
Background technique
In general, secondary cell is different from the one-shot battery that can not be charged, it is meant that the battery of energy charge and discharge is used extensively
In the electronic equipments such as mobile phone, laptop, video camera or electric car (EV) etc..Especially lithium secondary battery, operating voltage
About 3.6V has the capacity bigger than the nickel-cadmium cell or nickel-metal hydride battery of the power supply largely as electronics, per unit weight
Energy density it is high, thus its producing level is in rapidly increase trend.
Lithium type oxide and carbon material are mainly used separately as positive active material and negative electrode active material by lithium secondary battery.
Lithium secondary battery has the positive plate that this positive active material and negative electrode active material has been respectively coated and negative plate for partition
The electrode assembly that is configured between being set to, the outer packing that electrode assembly is sealed to storage together with electrolyte, i.e., outside battery
Shell.
Lithium secondary battery can be divided into the secondary electricity of pot that electrode assembly is built in metal can according to the shape of battery case
Pond and electrode assembly are built in the bag type secondary battery of the sack of aluminum laminate sheet.
Recently, the popularity of bag type secondary battery is high.Bag type secondary battery this have the advantage that, lightly, electrolyte
Leakage (leakage) possibility is small, can morphologically have flexibility, can embody identical capacity with smaller volume and quality
Secondary cell.
Fig. 1 and Fig. 2 is the figure for roughly illustrating previous bag type secondary battery.
If referring to FIG. 1 and FIG. 2, previous bag type secondary battery 10,12 has the sack 15 as battery case, storage
It electrode assembly 20 inside sack 15 and is connected to the anode ear 23 of electrode assembly 20 and negative electrode lug 27 and protrudes into
Positive wire 25 and negative wire 30 outside sack 15.Electrode assembly 20 have positive plate/partition/negative plate stacking or
Structure is batched, is built in together with electrolyte inside sack 15.In 4 frames of sack 15, it is formed with the sealing of mutual welding
Portion 35.
Secondary cell 10 as shown in Figure 1 be anode ear 23 and negative electrode lug 27 on the basis of electrode assembly 20 to same to each other
Direction protrusion, the battery for the unidirectional pin configuration that positive wire 25 and negative wire 30 are formed to a direction is shown in Fig. 2
Secondary cell 12 is that anode ear 23 and negative electrode lug 27 are protruded round about on the basis of electrode assembly 20,25 He of positive wire
The battery for the two-way pin configuration that negative wire 30 is formed to mutual opposite direction.
As described above, applying unidirectional lead or two-way lead in the past.In terms of the flowing of electronics, positive wire 25 and negative
The width and thickness of pole lead 30 are bigger, are more conducive to improve power, but if being unable to fully ensure the area of sealing 35, then
It is sealed to problem, thus application is restricted.
Summary of the invention
The technical problem to be solved in the present invention
It is low the subject to be solved by the invention is to provide a kind of impedance and high-power electrode assembly can be embodied.
The invention solves another project to be to provide a kind of include that impedance is low and can embody high-power electrode assembly
Secondary cell.
Technical solution
In order to solve the problem, electrode assembly of the invention includes: positive plate, and it is living to have positive electrode collector, anode
Property substance and anode ear；Negative plate has negative electrode collector, negative electrode active material and negative electrode lug；And partition, between described
Between positive plate and the negative plate；At least certain one is relative to the collector in the positive plate and negative plate, along two
The ear is embodied in direction, and the anode ear and the negative electrode lug constitute an angle of 90 degrees degree.
In one embodiment, the positive plate is attached with each anode ear, the negative plate in opposite counter area
It is convex along 4 directions of the electrode assembly that each negative electrode lug, the anode ear and negative electrode lug are attached in opposite counter area
Out.
At this point it is possible to be the positive electrode collector include each other the parallel 1st while and when the 2nd, the negative electrode collector
Also include each other the parallel 1st while and when the 2nd, the anode ear includes outside by the 1st side of the positive electrode collector
Extended 1st anode ear in side passes through the 2nd side of the positive electrode collector extended 2nd anode ear outward, the negative electrode lug
Including the 1st side by the negative electrode collector outward extended 2nd negative electrode lug, pass through the 2nd of the negative electrode collector the
Side and extended 2nd negative electrode lug outward, the positive electrode collector the 1st while with the negative electrode collector the 1st while vertical phase
It hands over.
In another embodiment, the positive plate is attached with certain one in negative plate in opposite counter area each
Another one is attached with an ear in ear, the positive plate and negative plate, and the ear of the positive plate and the ear of negative plate are along the electricity
It protrudes in 3 directions of pole component.
At this point it is possible to be the positive electrode collector include each other the parallel 1st while and when the 2nd, the negative electrode collector
Also include each other the parallel 1st while and when the 2nd, certain one includes by the collector in the positive plate and negative plate
1st while and outward extended 1st ear, by the collector the 2nd while extended 2nd ear outward, the positive plate
With another one in negative plate include by the 1st side of the collector extended 1st ear outward, the positive electrode collector
1st while and the negative electrode collector the 1st while intersect vertically.
In the present invention, the positive plate, the partition and the cathode board stacking.
The positive plate, the partition and the negative plate can be square form or rectangle form.
In order to solve another project, secondary cell of the invention includes electrode assembly of the invention.
This secondary cell can further include the sack for surrounding the aluminum laminate sheet of the electrode assembly, in the sack
Side, positive wire are engaged in the anode ear, and negative wire is engaged in the negative electrode lug, the lateral of Xiang Suoshu sack.And
And preferably in the positive plate and negative plate, by big two sides of a lateral edge of impedance between the collector and the lead
To embodiment.
Moreover, this secondary cell can be manufactured according to following manufacturing method.
Prepare electrode assembly of the invention, certain one is opposite in the positive plate and negative plate of the electrode assembly
Counter area is attached with each ear, and another one is attached with an ear in the positive plate and negative plate, the ear of the positive plate with
The ear of negative plate is protruded along 3 directions of the electrode assembly.Positive wire is engaged in the anode ear, negative wire is connect
Together in the negative electrode lug.The mode on the outside of the sack of aluminum laminate sheet is extended to the positive wire and negative wire, it will be described
After electrode assembly is built in the sack, to 3 of the sack of the positive wire and negative wire side
Direction outer peripheral surface carries out thermal welding, forms sealing, and the deflation area in non-thermal welding side forms air bag.It is bored on the air bag
Hole after internal gas is discharged, carries out thermal welding to the deflation area and seals.
Beneficial effect
According to the present invention, lead/collector is constituted in both directions relative at least certain one in each electrode, respectively with
It on the basis of positive/negative, flows electric current in both directions, thus reduces cell impedance.
In positive plate and negative plate, the input and output path of electric current can be formed in opposite opposite direction respectively, because
And it is able to suppress the concentration of local pyrexia phenomenon, inhibit battery unit deterioration.It, can be because of lead/current collection when high current charge and discharge
Body impedance reduces and embodies high power.
As described above, according to the present invention it is possible to allowing current to the wiring area maximization of enough flowings, manufacture Low ESR Gao Gong
Rate secondary cell.
Detailed description of the invention
Subsidiary following attached drawing is the example to the preferred embodiment of the present invention in this specification, the content one with aforementioned invention
With the effect for further understanding technical thought of the invention is played, therefore, the present invention must not only be defined in the thing that this attached drawing is recorded
Item explains.
Fig. 1 is the figure of the roughly bag type secondary battery of the previous unidirectional pin configuration of diagram.
Fig. 2 is the figure for roughly illustrating the bag type secondary battery of previous two-way pin configuration.
Fig. 3 is the top view of the electrode assembly of one embodiment of the invention, and Fig. 4 is exploded perspective view.
Fig. 5 is the top view for illustrating the electrode assembly of another embodiment of the present invention.
Fig. 6 is the top view for illustrating the electrode assembly of further embodiment of this invention.
Fig. 7 be include Fig. 3 electrode assembly secondary cell top view.
Fig. 8 to Figure 10 is the figure of the secondary cell and its manufacturing method for illustrating the electrode assembly including Fig. 5.
Specific embodiment
With reference to the accompanying drawings, to a preferred embodiment of the present invention will be described in detail.But the present invention be not limited to
Lower disclosed embodiment can be embodied in the form of mutually different multiplicity, and the present embodiment only makes disclosure of the invention more complete, mentions
For for more completely informing the scope of invention to technical staff.The shape of element in attached drawing is in order to emphasize more specific explanation
And exaggerated, identical appended drawing reference censures identical constituent element.
For the battery of previous unidirectional lead or two-way pin configuration, positive wire and negative wire only respectively have one
It is a, it is restricted in terms of positive wire and negative wire width and thickness in order to ensure the area of sealing, thus there are impedances
Greatly, the bad limitation of heat, current collecting efficiency largely occurs.A kind of structure is prompted in the present invention, along 4 directions (or 3 sides
To) lead is formed, power can be issued to greatest extent.
Fig. 3 is the top view for illustrating the electrode assembly of one embodiment of the invention, and Fig. 4 is exploded perspective view.
As shown in Figures 3 and 4, the electrode assembly 100 of one embodiment of the invention includes having anode ear 124a, 124b
Positive plate 126, the negative plate 146 with negative electrode lug 144a, 144b and between positive plate 126 and negative plate 146 every
Plate 130.
Positive plate 126 includes positive electrode collector 120 and the positive active material 122 coated on positive electrode collector 120.And
And positive plate 126 is attached to positive electrode collector 120 in such a way that anode ear 124a, 124b are to the two-way protrusion of mutual opposite direction.
In addition, negative plate 146 includes negative electrode collector 140 and the negative electrode active material 142 coated on negative electrode collector 140.Moreover, negative
Pole plate 146 is attached to negative electrode collector 140 in such a way that negative electrode lug 144a, 144b are to the two-way protrusion of mutual opposite direction.
As collector 120,140, it is preferable to use stainless steel, aluminium, nickel, titanium, carbon, copper or being carried out with carbon/nickel/titanium/silver
The manufacture such as stainless steel, aluminium-cadmium alloy of surface treatment.Collector 120,140 plays the electrochemistry collected by means of active material
Reaction and the effect of electronics needed for the electronics or supply electrochemical reaction that generate, generally using the metals such as copper or aluminium.Collector
120,140 it is made generally in 3~500 μm of thickness.Moreover, collector 120,140 can also be formed on its surface fine irregularities, mention
The adhesive force of high active substance 122,142, can for film, thin plate, foil (foil), net (mesh), porous plastid, foaming body,
The form of the multiplicity such as non-woven body.Active material 122,142, which plays, makes ion pass through the mobile effect of collector 120,140, this
The movement of a little ions, which is utilized, to be occluded ion from electrolyte and is centrifuged the interaction discharged to electrolyte.
The especially substantially a flat plate form of positive electrode collector 120, can be to select in aluminium foil, aluminium net and its equivalent
The a certain formation selected, but its material is not limited herein.Positive active material 122 is coated on positive electrode collector 120 at least
On one side.The slurry of the positive active material 122 that can occlude, discharge lithium ion, activated carbon, conductive material, sticker etc. will have been cooperated
Material is coated on positive electrode collector 120, can manufacture positive plate 126.As a positive electrode active material 122, it can use spinel-type
The lithium of crystalline textures and the compound chemical combination of transition metal such as three-dimensional crystalline substance, layered-type hexagonal crystal, olivine-type iris, three prismatic crystals
Object.For the viewpoints such as high power, high-energy density or long-life, lithium and nickel, violent, cobalt six side of layered-type can be preferably comprised
It is brilliant.For example, positive active material 122 can be in such as LiCoO2、LiNiO2、LiMn2O4Lithium type oxide and its equivalent
A certain kind of middle selection not limits the invention to this material.For example, positive active material 122 can be by LiCoO2、
LiNiO2、LiMn2O4、LiCoPO4、 LiFePO4、LiNiMnCoO2And LiNi1-x-y-zCoxM1yM2zO2(M1 and M2 are mutually indepedent
A certain kind that ground selects in the group being made of Al, Ni, Co, Fe, Mn, V, Cr, Ti, W, Ta, Mg and Mo, x, y and z are as phase
The atomic fraction of mutual independent oxide component, meets 0≤x < 0.5,0≤y < 0.5,0≤z < 0.5, x+y+z≤1) structure
At group in a certain active material particle that selects or mixture of more than two kinds is constituted in them.
Positive plate 126 especially of the invention with anode ear 124a, 124b to the upper direction of positive electrode collector 120 and under
The mode of portion direction protrusion is adhered to.This anode ear 124a, 124b can be in positive electrode collectors 120, by means of supersonic welding
Connect, laser welding, impedance welding etc. modes, be attached to the gutter of uncoated positive active material 122.But not this hair
The bright adhering mode for being defined in this anode ear 124a, 124b, various ear attachment well known to the application time point of the invention
Technology can be applied to the present invention.Moreover, it is also possible to positive electrode collector 120 and the one-piece type structure of anode ear 124a, 124b
At.That is, the gutter that anode ear 124a, 124b can be positive electrode collector 120 is extended.At this point, being omitted anode ear
The process that 124a, 124b are attached to positive electrode collector 120, thus manufacturing process is reduced, to save manufacturing expense.
The also substantially tabular of negative electrode collector 140, can be by a certain kind for selecting in copper foil, copper mesh and its equivalent
It is formed, but does not limit its material herein.Negative electrode active material 142 is coated on at least one side of negative electrode collector 140.It is this
Negative electrode active material 142 can be by by natural graphite, artificial graphite, carbonaceous material；Titanium composite oxide (LTO) containing lithium,
The metal class (Me) of Si, Sn, Li, Zn, Mg, Cd, Ce, Ni or Fe；The alloy type being made of the metal class (Me)；The gold
Belong to the oxide (MeOx) of class (Me)；And a certain kind selected in the metal class (Me) and the group of the complex composition of carbon is living
Property material grains or mixture of more than two kinds is constituted in them, but simultaneously non-present invention is defined in this material.
Especially negative electrode lug 144a, 144b, as shown, with to the left direction and right direction of negative electrode collector 140
The mode of protrusion is adhered to.This negative electrode lug 144a, 144b are the same as well as anode ear 124a, 124b, can be attached to cathode current collection
The gutter of uncoated negative electrode active material 142 in body 140, can be using such as ultrasonic bonding, laser welding, impedance welding
Various adhering mode of mode, otherwise, negative electrode collector 140 and negative electrode lug 144a, 144b can also be with one-piece type compositions.
Anode ear 124a, 124b are substantially electrically connected in positive electrode collector 120, thus with 120 phase of positive electrode collector
Same or similar material is formed.As an example, anode ear 124a, 124b can be aluminium foil.In addition, negative electrode lug 144a,
144b is also substantially electrically connected in negative electrode collector 140, thus can be and the same or similar material of negative electrode collector 140
Matter.As an example, negative electrode lug 144a, 144b can be copper foil or nickel foil.
Due to the difference of material, if occurred relatively more compared with anode ear 124a, 124b in negative electrode lug 144a, 144b
More heat, then, compared with the length of anode ear 124a, 124b, the length of negative electrode lug 144a, 144b are formed longer, or
Width or thickness are formed bigger by person, the impedance of negative electrode lug 144a, 144b are reduced, to also can reduce in negative electrode lug
The heat that 144a, 144b occur.If negative electrode lug 144a, 144b are easy heat dissipation, by means of this, control secondary cell temperature
Rise, thus battery performance can be kept.That is, as needed, anode ear 124a, 124b and negative electrode lug 144a, 144b can be adopted
With different in width, thickness, length etc..
Partition 130 makes between positive plate 126 and negative plate 146, makes between positive plate 126 and negative plate 146 absolutely
Edge, on the other hand, active material ion can exchange between positive plate 126 and negative plate 146.As partition 130, although not
Its type is limited, but preferably can be used by selected from by ethylene single-polymer, propylene list polymers, ethylene-butene copolymer, ethylene-
The porous substrate of the polyolefin macromolecular manufacture for the group that hexene copolymer and ethylene-methyl acrylate copolymer are constituted；
By selected from by polyester, polyacetals, polyamide, polycarbonate, polyimides, polyether-ether-ketone, polyether sulfone, polyphenylene oxide, polyphenylene sulfide
And the porous substrate of the macromolecule manufacture of the group of polyethylene naphthalenedicarboxylate composition；Or by particles of inorganic material and the high molecular mixing of adhesive
The porous substrate etc. that object is formed.Especially by the polyolefin macromolecular manufacture selected from the group being made of the copolymer
Porous substrate；By selected from by polyester, polyacetals, polyamide, polycarbonate, polyimides, polyether-ether-ketone, polyether sulfone, polyphenyl
The porous substrate of the macromolecule manufacture for the group that ether, polyphenylene sulfide and polyethylene naphthalenedicarboxylate are constituted is that it is preferable to use with non-woven fabrics form
's.
In addition, positive plate 126, partition 130 and negative plate 146 can be quadrangle state, rectangle form and rectangle form
In a certain form do not limit this form but in the present invention.
For positive plate 126, the composition of negative plate 146 and partition 130 or material, manufacturing method etc., except in this specification
Except the content of explanation, the known content of those skilled in the art also can be applied to the present invention, for
This content, description is omitted in this specification.
Positive plate 126, partition 130 and negative plate 146 can be the form of stacking, in the present invention, the component of stacking
Number does not limit.Moreover, in this stepped construction, anode ear 124a, 124b and negative electrode lug 144a, 144b also certain layer
It is folded.The anode ear 124a of stacking can be concentrated and be engaged in a positive wire (not shown).It can will in the opposite direction
The anode ear 124b concentration of stacking is engaged in another positive wire.Even if can also be engaged in negative electrode lug 144a, 144b of stacking
There is each negative wire.
In the present embodiment, anode ear 124a, 124b is attached respectively to counter area opposite in positive plate 126, relatively
It in positive electrode collector 120, embodies in both directions, negative electrode lug 144a, 144b are also attached respectively to phase opposite in negative plate 146
It is embodied in both directions relative to negative electrode collector 140 in anti-region.And, which is characterized in that anode ear 124a, 124b and negative
Tab 144a, 144b mutually constitute an angle of 90 degrees degree.
Anode ear 124a, 124b and negative electrode lug 144a, 144b constitute an angle of 90 degrees degree as described above, and along electrode assembly 100
4 directions protrusion.Therefore, electrode assembly 100 of the invention make by anode ear 124a, 124b and negative electrode lug 144a,
The input and output path of the electric current of 144b is respectively formed in opposite opposite direction, so that it is existing not only to inhibit the fever of part to concentrate
As, and therefore caused battery unit deterioration can be inhibited.
On the other hand, positive plate 126 includes mutual the 1st separated in parallel 121b in 121a and the 2nd.In addition, negative
Pole plate 146 also includes mutual the 1st separated in parallel 141b in 141a and the 2nd.Moreover, substantially, positive plate 126
1st when 121a can be the 1st of positive electrode collector 120 the, and the 2nd side 121b of positive plate 126 can be positive electrode collector 120
The 2nd side.Moreover, substantially, the 1st of negative plate 146 is when 141a can be the 1st of negative electrode collector 140 the, negative plate 146
The 2nd while 141b can be negative electrode collector 140 the 2nd while.
Wherein, anode ear 124a, 124b is properly termed as the 1st anode ear 124a and the 2nd anode ear 124b.More specifically,
Anode ear 124a, 124b include the 1st anode ear for extending predetermined length outward by the 1st side 121a of positive plate 126
124a, the 2nd anode ear 124b for extending predetermined length outward by the 2nd side 121b of the positive plate 126.
In addition, negative electrode lug 144a, 144b are properly termed as the 1st negative electrode lug 144a and the 2nd negative electrode lug 144b.More specifically,
Negative electrode lug 144a, 144b include the 1st negative electrode lug for extending predetermined length outward by the 1st side 141a of negative plate 146
144a, the 2nd negative electrode lug 144b for extending predetermined length outward by the 2nd side 141b of negative plate 146.
The 141a at the with negative plate 146 the 1st 121a of the 1st of positive plate 126 intersects vertically, the 2nd side of positive plate 126
The 2nd side 141b of 121b and negative plate 146 intersect vertically.Certainly, positive plate 126 and negative plate 146 are located at mutually different layer.
That is, positive plate 126 and negative plate 146 is made to constitute an angle of 90 degrees degree, it is laminated together with partition 130 and manufactures electrode assembly 100.By
This, anode ear 124a, 124b and negative electrode lug 144a, 144b constitute an angle of 90 degrees degree.
Therefore, the 1st anode ear 124a in the anode ear of electrode assembly 100 of the present invention extends towards the 1st direction, and described the
2 anode ear 124b extend towards as with the 2nd direction in the 1st contrary direction.Moreover, the 1st cathode in negative electrode lug
Ear 144a extends towards the 3rd direction to intersect vertically with the 1st direction, the 2nd negative electrode lug 144b towards as with the 3rd side
The 4th direction round about extends.Therefore, in some region not in the input and output path set of electric current, but along the 1st side
To and as its opposite direction the 2nd direction and the 3rd direction that intersects vertically with the 1st direction and as the of its opposite direction
The dispersion of 4 directions.Moreover, the side that the difference that ear is placed in positive electrode collector 120 and negative electrode collector 140 is opposite, so as to
Anode ear 124a, 124b and negative electrode lug 144a, 144b provide or provide from them more uniform Charged Couple.
Positive plate 126 and negative plate 146 are subjected to 90 degree of laminations, thus, if referring to Fig. 3, in electrode assembly 100,
As anode ear 124a, 124b to the upper direction of positive electrode collector 120 and lower part direction protrusion, negative electrode lug 144a, 144b to
The structure of left direction and the right direction protrusion of negative electrode collector 140.As described above, anode ear 124a, 124b and negative electrode lug
144a, 144b are on the basis of electrode assembly 100, and vertically the direction of left and right 4 is equipped with, and therefore, in battery pack assembling, generation can
Impedance is reduced to the situation of half according to electrode connection mode.If internal driving reduces, can seek to improve power.And
And anode ear 124a, 124b and negative electrode lug 144a, 144b are on the basis of electrode assembly 100, it is each to be equipped with two or more, therefore, such as
They are freely connected in parallel by fruit, then can obtain the battery for improving energy density, have the capacity that can according to need
And the advantages of designing the structure of any multiplicity.Needs and Low ESR are increased to the capacity of secondary cell it is, therefore, possible to provide meeting
Electrode assembly and secondary cell including it.
As described above, electrode assembly 100 of the invention is suitable for large area compared with small area and small-capacity cells unit
Or the battery unit of large capacity.The especially situation of area battery unit, electric current input and output path diversely exist, thus
The concentration of local pyrexia phenomenon can efficiently be inhibited, the degradation phenomena of battery unit caused by can also efficiently inhibiting thus.
As described above, for one embodiment of the present of invention, relative to positive plate/negative plate, respectively in both directions
The ear for embodying collector is laminated positive plate/negative plate by an angle of 90 degrees degree, assembled battery unit.After so constituting, make electric current edge
The flowing of 4 directions can be with body by means of the minimum resistance that is engaged between lead/collector of ear when high current electric discharge
Existing high power.
Fig. 5 is the top view for illustrating the electrode assembly of another embodiment of the present invention.
As shown in figure 5, the electrode assembly 110 of another embodiment of the present invention includes the anode with anode ear 124a, 124b
Plate 126, the negative plate 146 with a negative electrode lug 144a and the partition between positive plate 126 and negative plate 146 are (in figure
It is not shown).
Identical as one embodiment, anode ear 124a, 124b adhere to respectively in opposite counter area, relative to anode
Collector 120, embodies in both directions, but negative electrode lug 144a only forms one.Anode ear 124a, 124b and negative electrode lug as a result,
144a, which becomes, constitutes an angle of 90 degrees degree and along the structure of 3 directions of electrode assembly 110 protrusion.
Fig. 6 is the top view for illustrating the electrode assembly of further embodiment of this invention.
As shown in fig. 6, the electrode assembly 115 of further embodiment of this invention includes the anode with an anode ear 124a
Plate 126, the negative plate 146 with negative electrode lug 144a, 144b and the partition between positive plate 126 and negative plate 146 are (in figure
It is not shown).
Identical as one embodiment, negative electrode lug 144a, 144b adhere to respectively in opposite counter area, along cathode current collection
The both direction of body 140 embodies, but anode ear 124a only forms one.As a result, anode ear 124a and negative electrode lug 144a, 144b at
To constitute an angle of 90 degrees degree and along the structure of 3 directions of electrode assembly 115 protrusion.
Fig. 5 or structure shown in fig. 6 allow for injecting electrolytic solution and 3 direction lead knots for being vented (degas) process
Structure.If impedance larger part manufacture between the lead/collector engaged with ear in positive plate/negative plate is in pairs to more
Favorably.That is, in the case of fig. 5, positive plate is advantageous when impedance is larger between lead/collector, in the case of fig. 6, bear
Pole plate is advantageous when impedance is larger between lead/collector.
Fig. 7 be include Fig. 3 electrode assembly 100 secondary cell top view.
Wherein, electrode assembly 100 is identical as Fig. 3 and content shown in Fig. 4.Therefore, it omits to this electrode assembly 100
Repeated explanation.
As shown in fig. 7, electrode assembly 100 is surrounded completely by sack 215 in secondary cell 200.Sack 215 can be by
Play the substrate and cutting water that mechanical strength is kept as the polyolefin type resin layer of thermal adhesive layer, performance of sealing material effect
Divide the multilayer being laminated with the nylon layer of the aluminium layer (Al) as metal layer of the effect of oxygen, performance substrate and protective layer effect
Membrane structure is constituted.
For example, sack 215 can be with aluminium pouch-shaped state structure of the aluminium foil between the insulating layer and adhesive layer of polymerizable material
At.The insulating layer of polymerizable material can play the effect of substrate and protective layer, can play and protect inner containment for the first time
The effect that electrode assembly 100 is not influenced by external impact etc..The insulating layer of polymerizable material can be with nylon or such as poly- to benzene
The resin material of naphthalate (Polyethylene terephthalate, PET) is formed, but is not limited to this
Kind substance.Aluminium foil can play the substrate for keeping mechanical strength and prevent the effect of moisture and the barrier layer of oxygen intrusion.In addition to
It, can in order to prevent from improving the function of battery case intensity except the function of preventing the foreign matters such as gas, moisture from flowing into and leaking
To use aluminum or aluminum alloy, as aluminium alloy, such as can for 8079,1N30,8021,3003,3004,3005,3104,
No. 3105 alloys etc., they can individually or two or more is applied in combination.Wherein, 8079,1N30,8021 and 3004 can be special
Barrier layer is not preferably acted as.Adhesive layer is also known as hot welding layer, has heat sealability, can play sealant effect.Bonding
Layer can be formed with the resinous substances of polyolefin (Polyolepin) series.Be commonly used as polyolefin type resin layer has CPP
(Casted Polypropylene, cast polypropylene).In addition, adhesive layer can be gathered with being selected from by the chlorination of polyolefin resin
What propylene, polyethylene, ethylene propylene copolymer, polyethylene and acrylic copolymer and polypropylene and acrylic copolymer were constituted
The substance of group is formed, but is not limited to this substance.The integral thickness of sack 215 is usually 40~120 μm, preferably described exhausted
Edge layer and adhesive layer are 10~40 μm, and aluminium foil is 20~100 μm, but is not limited to this.In the case where the thickness is excessively thin,
Partition decline between the outside of sack 215 and inside, strength reduction, because without recommendation, on the contrary, if the thickness is blocked up,
So, the shortcomings that not only processability declines, but also there are the thickness of sack 215 and weight increases.
In addition, sack 215 includes lower part sack and top sack.In certain one in lower part sack and top sack,
Or it is whole in lower part sack and top sack, the bag cup that can store electrode assembly 100 can be formed with by drawing procedure.It will
After electrode assembly 100 is accommodated between lower part sack and top sack, if lower part sack and top sack stacked, for
The corresponding region in 100 outside of electrode assembly, which is applied, to be heated and pressurizeed, then is bonded as between the polyolefin type resin layer of thermal adhesive layer,
Sealing 235 is formed by means of thermal welding and realizes sealing.
At this point, positive wire 225 is engaged in anode ear 124a, 124b, positive wire 225 can be from the inside of sack 215
Extend outward.Moreover, negative wire 230 is engaged in negative electrode lug 144a, 144b, can prolong from the Inside To Outside of sack 215
It is long.Positive wire 225 and negative wire 230 are used as laminal metal, and one end is attached to each anode ear 124a, 124b or cathode
Ear 144a, 144b, the other end, that is, opposite end is exposed to outside sack 215.At this point, using aluminium as positive wire 225, make
It uses copper or is coated with the copper of nickel as negative wire 230, better effect.Between anode ear 124a, 124b and positive wire 225,
Engagement between negative electrode lug 144a, 144b and negative wire 230 can use ultrasonic bonding etc..
Positive wire 225 can be attached to the top or lower part of anode ear 124a, 124b.Anode ear 124a, 124b with just
The position at the joint portion that pole lead 225 adheres to can be positioned at sealing 235 or than the close electrode assembly 100 of its inside
Position.In the same manner, negative wire 230 can be attached to the top or lower part of negative electrode lug 144a, 144b.Negative electrode lug 144a, 144b
The position at the joint portion adhered to negative wire 230 can be positioned at sealing 235 or than the close electrode assembly of its inside
100 position.
In addition, (can not show in figure there are also band between positive wire 225 and negative wire 230 and sack 215
Out).The positive wire 225 and negative wire 230 of metal material are when being heat fused in the sack 215 of polymerizable material, contact resistance
Resist slightly larger, surface is adjacent to power can be low.But if having between positive wire 225 and negative wire 230 and sack 215
Band can then prevent the low phenomenon of this power of being adjacent to.Additionally, it is preferred that band is insulating properties material, electric current can be cut off
Sack 215 is accessed from positive wire 225 and negative wire 230.Most preferably band is by thin with insulating properties and heat sealability
Film is constituted.Band for example can be by being selected from acid imide (PI:polyimide) polypropylene (PP:polyprophylene), poly- second
Alkene (PE:polyethylene) and polyethylene terephthalate (PET:polyethylene terephthalate) etc.
Material layer (single film or multiple film) more than a certain kind is constituted.
As described above, secondary cell 200 has 4 direction pin configurations, there is identical polar between opposite lead.
Although being accommodated in the inside of sack 215 in liquid electrolyte, polymer moreover, not illustrated in figure at this
The a certain kind selected in electrolyte and its equivalent, this is self-evident.As electrolyte, using corresponding field use i.e.
Can, it is not particularly limited its ingredient.Specifically, electrolyte can be made of nonaqueous electrolytic solution and lithium salts.As nonaqueous electrolytic solution,
N-methyl-2-pyrrolidone, propene carbonate, ethylene carbonate, butylene, dimethyl carbonate, carbon can be used for example
Diethyl phthalate, gamma-butyrolacton, 1,2- dimethoxy-ethane, tetrahydroxy furans (franc), 2- methyltetrahydrofuran, dimethyl are sub-
Sulfone, 1,3- dioxin-pentane, formamide, dimethylformamide, dioxin-pentane, acetonitrile, nitromethane, methyl formate, tumer
Ester, phosphotriester, trimethoxy-methane, dioxolane derivatives, sulfolane, methyl sulfolane, 1,3- dimethyl -2- imidazoline
The non-proton organic solvents such as ketone, propylene carbonate ester derivant, tetrahydrofuran derivatives, ether, methyl propionate, ethyl propionate.
Lithium salts as the substance for being soluble in the nonaqueous electrolyte, can be used for example LiCl, LiBr, LiI,
LiClO4、LiBF4、LiB10Cl10、LiPF6、LiCF3SO3、LiCF3CO2、LiAsF6、 LiSbF6、LiAlCl4、CH3SO3Li、
CF3SO3Li、(CF3SO2)2NLi, chloroboric acid lithium, lower aliphatic lithium carbonate, tetraphenylboronic acid lithium, acid imide etc..In addition, for
Improve charge-discharge characteristic, flame retardancy the purpose of, can also in nonaqueous electrolyte, add for example pyridine, triethyl phosphite,
Triethanolamine, cyclic ethers, ethylenediamine, n- glycol dimethyl ether, hexaphosphoric acid triamide, nitrobenzene derivative, sulphur, quinoneimine dye,
Oxazolidone, the N of N- substitution, N- substituted imidazole alkane, glycol dialkyl ether, ammonium salt, pyrroles, 2-methyl cellosolve, tri-chlorination
Aluminium etc..It according to circumstances, in order to impart nonflammability, can also include carbon tetrachloride, trifluoro-ethylene etc. containing halogen solvent, in order to improve
High temperature storage characteristic can also include carbon dioxide gas.
Fig. 8~Figure 10 is the figure of the secondary cell and its manufacturing method for illustrating the electrode assembly including Fig. 5.
Firstly, if preparing the electrode assembly 110 of Fig. 5 referring to Fig. 8.Positive wire is engaged in anode ear 124a, 124b
225, negative wire 230 is engaged in negative electrode lug 144a.With positive wire 225 and negative wire 230 to 215 lateral of sack
Electrode assembly 110 is built in sack 215 by mode.To the sack 215 of 230 place side of positive wire 225 and negative wire
3 direction outer peripheral surfaces carry out thermal welding, form sealing 235a.Deflation area in non-thermal welding side forms air bag A.That is, making
Part holt melt connects in addition to the deflation area of side in 215 outer peripheral surface position of sack, is sealed, to be equipped with air bag in deflation area
A。
Then, it carries out injecting electrolyte process on the inside of sack 215, if it is desired, also execute and aim to ensure that sack 215 is rigid
The baking (baking) etc. of property.Especially because the electrode assembly 110 of 3 direction pin configurations is utilized, pass through non-thermal welding
Electrolyte can be injected in the deflation area of side, thus very convenient.It can also carry out ageing (aging), the charge and discharge of secondary cell
Electricity, steps necessaries such as (formation) of forming into columns.
Referring next to Fig. 9, implement steps of exhausting.
If in steps of exhausting, drill B on air bag A referring to Fig. 9, make inside the sack 215 occurred in preceding step
Gas discharge.
Then, as shown in Figure 10, also make deflation area thermal welding, form sealing 235b.Then, implement to cut opening portion
The manufacture of secondary cell 210 is completed in disconnected trimming.
As described above, secondary cell 210 has 3 direction pin configurations, polarity having the same between opposite lead.
Due to the electrode assembly 110 using 3 direction pin configurations, so as to advantageously carry out injecting electrolytic solution and deairing step,
Manufacture secondary cell 210.
The preferred embodiment of the present invention is had been shown and described above, but the present invention is not limited to described specific preferred
Embodiment, in the case where the main idea of the present invention requested without departing from claims, the technology of corresponding technical field that the present invention belongs to
Personnel can carry out the deformation implementation of multiplicity, moreover, this change also in the range of claims are recorded.In addition, at this
In specification, upper and lower, left and right etc. has been used to represent the term in direction, but this term simply to illustrate that convenience and
Opposite position is represented, can be different according to the configuration for the position or each component that observer observes, this is this hair
Bright practitioner is self-evident.
Claims (10)
1. a kind of electrode assembly characterized by comprising
Positive plate has positive electrode collector, positive active material and anode ear；
Negative plate has negative electrode collector, negative electrode active material and negative electrode lug；And
Partition, between the positive plate and the negative plate；
At least certain one embodies the ear relative to the collector in both directions in the positive plate and negative plate,
The anode ear and the negative electrode lug constitute an angle of 90 degrees degree.
2. electrode assembly according to claim 1, which is characterized in that
The positive plate is attached with each anode ear in opposite counter area,
The negative plate is attached with each negative electrode lug in opposite counter area,
The anode ear and negative electrode lug are protruded along 4 directions of the electrode assembly.
3. electrode assembly according to claim 2, which is characterized in that
The positive electrode collector include each other the parallel 1st while and when the 2nd,
The negative electrode collector also include each other the parallel 1st while and when the 2nd,
The anode ear include by the 1st side of the positive electrode collector outward extended 1st anode ear, by it is described just
2nd side of electrode current collector and extended 2nd anode ear outward,
The negative electrode lug include by the 1st side of the negative electrode collector outward extended 2nd negative electrode lug, by described negative
2nd side of electrode current collector and extended 2nd negative electrode lug outward,
The 1st of the positive electrode collector while with the negative electrode collector the 1st while intersect vertically.
4. electrode assembly according to claim 1, which is characterized in that
Certain one is attached with each ear in opposite counter area in the positive plate and negative plate,
Another one is attached with an ear in the positive plate and negative plate,
The ear of the positive plate and the ear of negative plate are protruded along 3 directions of the electrode assembly.
5. electrode assembly according to claim 4, which is characterized in that
The positive electrode collector include each other the parallel 1st while and when the 2nd,
The negative electrode collector also include each other the parallel 1st while and when the 2nd,
Certain one includes by the 1st side of the collector extended 1st ear, logical outward in the positive plate and negative plate
The 2nd side of the collector and outward extended 2nd ear are crossed,
In the positive plate and negative plate another one include by the 1st side of the collector extended 1st ear outward,
The 1st of the positive electrode collector while and the negative electrode collector the 1st while intersect vertically.
6. electrode assembly according to claim 1, which is characterized in that the positive plate, the partition and the negative plate
Stacking.
7. electrode assembly according to claim 1, which is characterized in that the positive plate, the partition and the negative plate
It is square form or rectangle form.
8. a kind of secondary cell, which is characterized in that the electrode assembly recorded including any one of claim 1 to 7.
9. secondary cell according to claim 8, which is characterized in that further include the aluminum laminate sheet for surrounding the electrode assembly
Sack, in the inside of the sack, positive wire is engaged in the anode ear, and negative wire is engaged in the negative electrode lug, to
The lateral of the sack.
10. secondary cell according to claim 9, which is characterized in that in the positive plate and negative plate, by the collection
The big side of impedance is embodied in both directions between electric body and the lead.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150124322A KR101900999B1 (en) | 2015-09-02 | 2015-09-02 | Electrode assembly, secondary battery comprising the same and fabrication method thereof |
| KR10-2015-0124322 | 2015-09-02 | ||
| PCT/KR2016/007568 WO2017039143A1 (en) | 2015-09-02 | 2016-07-12 | Electrode assembly, secondary battery comprising same, and manufacturing method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN208799783U true CN208799783U (en) | 2019-04-30 |
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| CN201690000754.XU Active CN208799783U (en) | 2015-09-02 | 2016-07-12 | Electrode assembly, the secondary cell including it |
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|---|---|
| KR (1) | KR101900999B1 (en) |
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| WO (1) | WO2017039143A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113497276A (en) * | 2020-03-19 | 2021-10-12 | 本田技研工业株式会社 | Solid battery cell |
| CN114144911A (en) * | 2020-01-31 | 2022-03-04 | 株式会社Lg新能源 | Irreversible additive contained in positive electrode material for secondary battery, positive electrode material containing same, and secondary battery containing same |
| WO2024016272A1 (en) * | 2022-07-21 | 2024-01-25 | 宁德时代新能源科技股份有限公司 | Battery cell and manufacturing method therefor, and battery and electric device |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019069784A1 (en) * | 2017-10-06 | 2019-04-11 | 日本電気株式会社 | Film-sheathed battery, battery pack and method for producing film-sheathed battery |
| KR102261177B1 (en) * | 2018-08-01 | 2021-06-07 | 주식회사 엘지에너지솔루션 | Secondary battery for testing internal short, method and apparatus for testing internal short of secondary battery using the same |
| JP7461705B2 (en) * | 2020-03-18 | 2024-04-04 | 本田技研工業株式会社 | Secondary battery using bipolar electrodes |
| JP7461765B2 (en) * | 2020-03-19 | 2024-04-04 | 本田技研工業株式会社 | Secondary battery using bipolar electrodes |
| EP4087003A3 (en) * | 2021-05-05 | 2022-12-14 | DarmokTech | Cell, lithium based battery and method for dissembling the battery |
| CN116053605B (en) * | 2022-11-21 | 2024-03-12 | 江苏正力新能电池技术有限公司 | Battery cell, battery cell preparation method and lithium battery |
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| JP4845388B2 (en) | 2005-02-23 | 2011-12-28 | セイコーインスツル株式会社 | Electrochemical cell |
| JP5206657B2 (en) * | 2009-12-08 | 2013-06-12 | 株式会社Ｇｓユアサ | Batteries with stacked pole groups |
| JP5618010B2 (en) * | 2010-12-20 | 2014-11-05 | エルジー・ケム・リミテッド | Lithium secondary battery having multidirectional lead-tab structure |
| JP2012204305A (en) * | 2011-03-28 | 2012-10-22 | Mitsubishi Heavy Ind Ltd | Battery cell |
| JP2013254629A (en) * | 2012-06-06 | 2013-12-19 | Toyota Industries Corp | Power storage device and secondary battery |
| KR20140036437A (en) * | 2012-09-14 | 2014-03-26 | 주식회사 엘지화학 | Fabricating method of secondary battery and electrochemical cell having the secondary battery |
-
2015
- 2015-09-02 KR KR1020150124322A patent/KR101900999B1/en active IP Right Grant
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- 2016-07-12 WO PCT/KR2016/007568 patent/WO2017039143A1/en active Application Filing
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114144911A (en) * | 2020-01-31 | 2022-03-04 | 株式会社Lg新能源 | Irreversible additive contained in positive electrode material for secondary battery, positive electrode material containing same, and secondary battery containing same |
| CN113497276A (en) * | 2020-03-19 | 2021-10-12 | 本田技研工业株式会社 | Solid battery cell |
| WO2024016272A1 (en) * | 2022-07-21 | 2024-01-25 | 宁德时代新能源科技股份有限公司 | Battery cell and manufacturing method therefor, and battery and electric device |
Also Published As
| Publication number | Publication date |
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| WO2017039143A1 (en) | 2017-03-09 |
| KR101900999B1 (en) | 2018-09-20 |
| KR20170027544A (en) | 2017-03-10 |
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Effective date of registration: 20211230 Address after: Seoul, South Kerean Patentee after: LG Energy Solution,Ltd. Address before: Seoul, South Kerean Patentee before: LG CHEM, Ltd. |