CN101916841A - Battery - Google Patents

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Publication number
CN101916841A
CN101916841A CN2010102763108A CN201010276310A CN101916841A CN 101916841 A CN101916841 A CN 101916841A CN 2010102763108 A CN2010102763108 A CN 2010102763108A CN 201010276310 A CN201010276310 A CN 201010276310A CN 101916841 A CN101916841 A CN 101916841A
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China
Prior art keywords
conductive
negative electrode
battery
electrode collector
conductive plate
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Granted
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CN2010102763108A
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Chinese (zh)
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CN101916841B (en
Inventor
山村裕一郎
堀江英明
岛村修
柳原康宏
宫竹一希
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Nissan Motor Co Ltd
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Nissan Motor Co Ltd
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Publication of CN101916841A publication Critical patent/CN101916841A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/54—Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges
    • 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
    • H01M10/0413—Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/64—Carriers or collectors
    • H01M4/66—Selection of materials
    • H01M4/665—Composites
    • H01M4/667—Composites in the form of layers, e.g. coatings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/64—Carriers or collectors
    • H01M4/66—Selection of materials
    • H01M4/668—Composites of electroconductive material and synthetic resins
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Composite Materials (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Secondary Cells (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Cell Electrode Carriers And Collectors (AREA)

Abstract

A kind of battery, it comprises electrode and electrode terminal, this electrode comprises: multilayer collector body assembly, this multilayer collector body assembly has multilayer portion and conductive part, this multilayer portion comprises insulating barrier and is arranged in two conductive layers of the opposition side of insulating barrier, this conductive part is made by electric conducting material, is connected with two conductive layers and further extends towards the side of electrode than the side of insulating barrier from described two conductive layers, thereby be electrically connected with described electrode terminal; And a pair of active material layer, it is disposed in the opposition side of multilayer portion, and insulating barrier extends to the set bend of multilayer collector body assembly.

Description

Battery
The application's application number that to be applicant Nissan Motor propose on July 11st, 2008 is 200810132330.0, denomination of invention is divided an application for the patent application of " laminate type battery ".
Technical field
The present invention relates to a kind of battery, more particularly, relate to the capacity of laminate type battery and the improvement of durability.
Background technology
In auto industry, in recent years, the research and development that are used for the large-scale lithium rechargeable battery of motor vehicle (EV) and hybrid electric vehicle (HEV) in vogue, and attempted increasing the energy density and the output of battery.In order to increase energy density, it is effective making collector body as the component part of battery thinner, known following collector body: the opposition side that this collector body is formed at the resin bed lighter than metal level is furnished with ion conductive layer, thereby the collector body that forms is thinner than the collector body that is only formed by metal.The example of this collector body is disclosed in Japanese kokai publication hei 11-102711 communique and Te Kai 2001-297795 communique.
Summary of the invention
Yet, if ion conductive layer is arranged in the opposition side of resin bed, then collector body be used for when the electrode terminal of outside projected current is connected, being difficult between ion conductive layer, to obtain contact fully, thereby may cause that contact resistance increases and battery capacity reduces.
Therefore, the purpose of this invention is to provide a kind of battery, this battery can obtain excellent capacity under the situation that does not reduce volume energy density.
To achieve these goals, a kind of battery is provided according to an aspect of the present invention, it comprises electrode and electrode terminal, this electrode comprises: multilayer collector body assembly, this multilayer collector body assembly has multilayer portion and conductive part, this multilayer portion comprises insulating barrier and is arranged in two conductive layers of the opposition side of insulating barrier, conductive part is made by electric conducting material, be connected with two conductive layers, and further extend from the side of two conductive layers, to be electrically connected with electrode terminal towards the side of electrode than insulating barrier; And a pair of active material layer, it is disposed in the opposition side of multilayer portion, conductive part comprises that conductive plate is electrically connected with electrode terminal at the one end as the conductive plate that is independent of the parts of multilayer portion, and is connected with the surface electrical separately of two conductive layers in the mode of the other end with face-face contact.
A kind of battery is provided according to a second aspect of the invention, it comprises electrode and electrode terminal, this electrode comprises: multilayer collector body assembly, this multilayer collector body assembly has multilayer portion and conductive part, this multilayer portion comprises insulating barrier and is arranged in two conductive layers of the opposition side of insulating barrier that conductive part is made by electric conducting material, is connected with two conductive layers, and further extend from the side of two conductive layers, to be electrically connected with electrode terminal towards the side of electrode than insulating barrier; And a pair of active material layer, it is disposed in the opposition side of multilayer portion, and insulating barrier extends to the set bend of multilayer collector body assembly.
According to a further aspect in the invention, provide a kind of laminate type battery, this laminate type battery comprises: electrode terminal; And electrode, it is electrically connected with electrode terminal at side, and has multilayer collector body assembly, wherein, multilayer collector body assembly comprises multilayer portion and conductive part, this multilayer portion has insulating barrier and is arranged in two conductive layers of the opposition side of insulating barrier, this conductive part is made by electric conducting material, and between each conductive layer and electrode terminal, extend so that each conductive layer is electrically connected with electrode terminal, thereby conductive part is tabular and contacts with conductive layer along the whole width horizontal expansion of conductive layer, and electrode also comprises a pair of active material layer of the opposition side that is arranged in multilayer portion.
Description of drawings
Fig. 1 is the schematic cross sectional views of the cell device of lithium rechargeable battery according to an embodiment of the invention.
Fig. 2 A and Fig. 2 B constitute the lithium rechargeable battery of first embodiment and the stereogram of engaged negative pole and ion guide electroplax, and wherein, Fig. 2 A is the view before engaging, and Fig. 2 B is the view after engaging.
Fig. 3 A and Fig. 3 B constitute according to the lithium rechargeable battery of second embodiment and the stereogram of engaged negative pole and ion guide electroplax, and wherein, Fig. 3 A is the view before engaging, and Fig. 3 B is the view after engaging;
Fig. 4 A and Fig. 4 B constitute the lithium rechargeable battery of the 3rd embodiment and the stereogram of engaged negative pole and ion guide electroplax, and wherein, Fig. 4 A is the view before engaging, and Fig. 4 B is the view after engaging;
Fig. 5 A and Fig. 5 B constitute according to the lithium rechargeable battery of the 4th embodiment and the stereogram of engaged negative pole and ion guide electroplax, and wherein, Fig. 5 A is the view before engaging, and Fig. 5 B is the view after engaging;
Fig. 6 A and Fig. 6 B constitute according to the lithium rechargeable battery of the 5th embodiment and the stereogram of engaged negative pole and ion guide electroplax, and wherein, Fig. 6 A is the view before engaging, and Fig. 6 B is the view after engaging;
Fig. 7 A and Fig. 7 B constitute according to the lithium rechargeable battery of the 6th embodiment and the stereogram of engaged negative pole and ion guide electroplax, and wherein, Fig. 7 A is the view before engaging, and Fig. 7 B is the view after engaging;
Fig. 8 A and Fig. 8 B constitute according to the lithium rechargeable battery of the 7th embodiment and the stereogram of engaged negative pole and ion guide electroplax, and wherein, Fig. 8 A is the view before engaging, and Fig. 8 B is the view after engaging;
Fig. 9 A and Fig. 9 B constitute according to the lithium rechargeable battery of the 8th embodiment and the stereogram of engaged negative pole and ion guide electroplax, and wherein, Fig. 9 A is the view before engaging, and Fig. 9 B is the view after engaging;
Figure 10 is the schematic cross sectional views according to the cell device of the lithium rechargeable battery of the 9th embodiment;
Figure 11 is the schematic cross sectional views according to the lithium rechargeable battery of the tenth embodiment; And
Figure 12 is the stereogram of negative pole of the lithium rechargeable battery of example according to a modification of this invention.
Specific embodiment
Hereinafter, embodiments of the invention are described with reference to the accompanying drawings, wherein, represent identical parts, and omit its repeat specification with identical Reference numeral.In addition, in the accompanying drawings, the size relationship between some parts is different with actual relationship, and for convenience of description, a bit exaggeration.
First embodiment
As shown in Figure 1, the laminate type battery 1 of first embodiment is a lithium rechargeable battery for example, and is configured to comprise electric power producing component or the cell device 2 that is sealed in as in the aluminum laminate sheet 3 of shell.Cell device 2 comprises single cell units 11, and this single cell units 11 is by constituting with the lower part: anodal (electrode) 6, and it has positive electrode collector 4 and is formed on the surface of positive electrode collector 4 and comprises the anode active material layer 5 of positive electrode active materials; Dielectric substrate 7, it comprises electrolyte; And negative pole (electrode) 10, it has negative electrode collector 8 and is formed on the surface of negative electrode collector 8 and comprises the anode active material layer 9 of negative active core-shell material.Positive pole 6, dielectric substrate 7 and negative pole 10 are stacked in order.In addition, dielectric substrate 7 has and is suitable for keeping the barrier film of electrolyte and remains on electrolyte in the barrier film.The positive electrode collector 4 of cell device 2 is electrically connected with the positive terminal (electrode terminal) 12 that is used for to outside projected current, and negative electrode collector 8 is electrically connected with the negative terminal (electrode terminal) 14 that is used for to outside projected current by means of conductive plate (conductive part) 13.Positive terminal 12 and negative terminal 14 engage by ultrasonic wave and engage with positive electrode collector 4 and conductive plate 13.In the embodiment in figure 1, cell device 2 is made up of four battery units 11.In addition, because in this embodiment, negative pole 10 is arranged to constitute the outermost layer of cell device 2, therefore has three negative electrode collectors 8 and two positive electrode collectors 4.Simultaneously, though the embodiment of Fig. 1 illustrates three negative electrode collectors 8 and two positive electrode collectors 4 are stacked, this only is for graphic convenience, is actually seven negative electrode collectors 8 and seven positive electrode collectors 4 are stacked.Battery 1 has smooth rectangular shape and is of a size of: length is that 210mm, width are that 95mm and thickness are 5mm.Yet the quantity of battery unit 11 is unrestricted, but can consider the battery capacity of expectation and battery output and suitably determine.
The negative electrode collector of the lithium rechargeable battery 1 of present embodiment (multilayer portion) 8 is configured to have sandwich construction, in this sandwich construction, the opposition side that the first conductive layer 16A that is made by electric conducting material and the second conductive layer 16B are disposed in the insulating barrier of being made by insulating material 15, thus insulating barrier 15 is placed between the first conductive layer 16A and the second conductive layer 16B.Negative electrode collector 8 makes to have the facing surfaces part at folded up portion 17 places in the distolateral folded up portion 17 that is formed with that contacts with conductive plate 13, forms the space between this facing surfaces part.In addition, conductive plate 13 also in the distolateral folded up portion 18 that is formed with that contacts with negative electrode collector 8, makes to have the facing surfaces part at folded up portion 18 places, forms the space between this facing surfaces part.Collector body folded up portion 17 and conductive plate folded up portion 18 be by being bonded on one of them folded up portion in the space of another folded up portion, thereby make their face-face contacts and being engaged each other.Like this, conductive plate 13 is contacted with the first conductive layer 16A with the equal face-face of the second conductive layer 16B, win conductive layer 16A and the second conductive layer 16B are electrically connected to each other by means of conductive plate 13.In addition, by the ultrasonic wave joint conductive plate 13 and negative electrode collector 8 are engaged at face-face contact site place, thereby form junction surface 19 (with reference to Fig. 2 B).In the present embodiment, by conductive plate (conductive part) 13 and negative electrode collector (laminated section) 8 are bonded together, constituted single multilayer collector body assembly.
When conductive plate 13 engages with negative electrode collector, shown in Fig. 2 A, negative electrode collector 8 is formed with folded up portion 17 and 18 respectively with conductive plate 13, thereafter, makes two folded up portion overlapped in the mode in the space that one of them folded up portion is bonded on with locking another folded up portion.By wave welding head of ultrasonic wave (ultrasonic horn) with overlapping portion under pressure engaged to butt and to overlapping portion apply ultrasonic vibration, as Fig. 2 B shown in form junction surface 19 thereafter.Though form three independent junction surfaces 19 in the present embodiment, the quantity at junction surface 19 is unrestricted, but junction surface 19 forms to have and engages width d and bonding length L.Simultaneously, joint method is not limited to ultrasonic wave and engages, but can be as other joint methods such as laser welding and electric resistance weldings.Face to face-and the face contact site, be resistance value between the face-face contact site of conductive plate 13 in the present embodiment and negative electrode collector 8 when low, can obtain the excellent more battery of battery capacity, and resistance value is preferably below the 0.5M Ω.
To positive electrode collector 4 used thicknesses are aluminium foils of 15 μ m, and the first conductive layer 16A of anticathode collector body 8 and the second conductive layer 16B used thickness are the Copper Foils of 3 μ m.In addition, constitute negative electrode collector 8 and the gross thickness of the three-decker be made up of the first conductive layer 16A, insulating barrier 15 and the second conductive layer 16B is 31 μ m.Simultaneously, the electric conducting material that is used for collector body 4 and 8 is unrestricted, but can use as electric conducting materials such as aluminium foil, Copper Foil and stainless steel (SUS) paper tinsels.Along with the first conductive layer 16A and the second conductive layer 16B are thinner, can obtain the excellent more battery of battery capacity, and the thickness of the preferred first conductive layer 16A and the second conductive layer 16B is positioned at the scope of 0.1 μ m～5 μ m.
Insulating barrier 15 used thicknesses of anticathode collector body 8 are polyimide films of 25 μ m.Simultaneously, though, can use insulating material such as other resin material for the polyimides of insulating barrier 15 expectation excellent heat resistances.Owing to, can obtain the excellent more battery of durability and resistance to vibration, so the thickness of insulating barrier 15 is preferably more than the 5 μ m along with insulating barrier 15 is thicker.
Though conductive plate 13 is used Copper Foil, also can use as other electric conducting material such as aluminium foil and stainless steel (SUS) paper tinsel to replace Copper Foil.
Though hereinafter will carry out brief description to other member of the lithium rechargeable battery that constitutes present embodiment, this explanation is not for the purpose that limits, but can adopt other known structure to replace these members.
[active material layer]
Active material layer contains active material, and also contains additive as required.
Anode active material layer 5 contains positive electrode active materials.LiMn is provided 2O 4As positive electrode active materials, make it have the thickness of 70 μ m.Simultaneously, positive electrode active materials is not limited to LiMn 2O 4, but can use as LiNiO 2Replace LiMn Deng lithium-transition metal oxide, lithium-transition metal phosphide, lithium-transient metal sulfide 2O 4Occasion at needs can be used two or more positive electrode active materials jointly.Simultaneously, much less can use positive electrode active materials except above-mentioned material.
Negative electrode active layer 9 contains negative active core-shell material.Provide graphite as negative active core-shell material, make it have the thickness of 12 μ m.Simultaneously, negative active core-shell material is not limited to graphite, replaces graphite but can use for example to wait as material with carbon element, above-mentioned lithium-transistion metal compound, metal material, lithium-metal alloys such as graphite, soft carbon and hard carbons.Occasion at needs can be used two or more negative active core-shell materials jointly.Simultaneously, much less can use negative active core-shell material except above-mentioned material.
Be not limited to particular value although be included in the average grain diameter of the active material in each active material layer 5 and 9, its value is positioned at the scope of about 0.1 μ m～about 100 μ m usually, and is preferably placed in the scope of 1 μ m to 20 μ m.Yet, certainly adopt average grain diameter to be positioned at active material outside the preferable range.
As the example that is included in the additive in anode active material layer 5 and the anode active material layer 9, can mention adhesive, conductive auxiliary agent, electrolytic salt (lithium salts) etc.
As the example of adhesive, can mention polyvinylidene fluoride (PVDF), synthetic rubber binder etc.
Conductive auxiliary agent refers to be included in the additive that is used to improve conductivity in anode active material layer 5 and the anode active material layer 9.As the example of conductive auxiliary agent, can mention graphite, gas-phase growth of carbon fibre etc.
As the example of electrolytic salt (lithium salts), can mention Li (C 2F 5SO 2) 2N, LiPF 6, LiBF 4, LiClO 4, LiAsF 6, LiCF 3SO 3Deng.
As the example of ionic-conductive polymer, can mention poly(ethylene oxide) (PEO) polymer, PPOX (PPO) polymer etc.
The mixing ratio that is included in the composition in anode active material layer 5 and the anode active material layer 9 is unrestricted.Can suitably adjust mixing ratio about the Given information of rechargeable nonaqueous electrolytic battery by reference.
[dielectric substrate]
As mentioned above, the dielectric substrate 7 in the lithium rechargeable battery 1 of present embodiment is made up of the electrolyte of barrier film and injection barrier film.
Barrier film has the function that makes positive pole and anode active material layer separate and prevent the short circuit between positive pole and the anode active material layer.Barrier film is made up of polyolefinic pore film such as for example polyethylene and polypropylene etc.In the occasion of needs, barrier film can be made by the particle of nonwoven fabrics or similar material.
Without any special restriction, but can consider that the required performance characteristic of battery suitably sets the thickness of barrier film to the thickness of barrier film.Particularly, the thickness of barrier film preferably below the 20 μ m, is more preferably below the 10 μ m, further preferably below the 5 μ m.On the other hand, although to the thickness of barrier film without any special lower limit, but from preventing the viewpoint of the short circuit between anode active material layer and the anode active material layer effectively, the thickness of barrier film is preferably more than the 0.1 μ m, be more preferably more than the 0.5 μ m, and further preferably more than the 1 μ m.Yet,, can utilize thickness to be positioned at barrier film outside the above-mentioned scope in the occasion of needs.
In addition, barrier film has the electrolytical function of maintenance.As the electrolyte in the barrier film in the lithium rechargeable battery 1 that remains on present embodiment, can mention liquid electrolyte and gel electrolyte.
Liquid electrolyte comprises the nonaqueous solvents (organic solvent) as plasticizer and is dissolved in the lithium salts as supporting electrolyte in the nonaqueous solvents.As nonaqueous solvents and lithium salts, can use as ethylene carbonate (EC) and propylene carbonate carbonic esters such as (PC) and as LiBF4 (LiBF 4) waiting compound, this compound also can be added to the active material layer of electrode.
Gel electrolyte comprises matrix polymer of being made by ionic-conductive polymer and the aforesaid liquid electrolyte that injects this matrix polymer.Ionic-conductive polymer as matrix polymer can use as poly(ethylene oxide) (PEO), PPOX polymer such as (PPO), and this polymer also can be added to the active material layer of electrode.
Simultaneously, when the matrix polymer of gel electrolyte is prepared to when having cross-linked structure, the matrix polymer of gel electrolyte can show excellent mechanical strength.In order to form matrix polymer with cross-linked structure, use suitable polymerization initiator and as aggregation processing such as thermal polymerization, polymerizable ultraviolet, ray polymerization, electron beam polymerization matrix polymer is carried out polymerization just enough, this aggregation processing is determined according to the influencing factor of polymerization initiator.
Although below understood in detail to comprise the dielectric substrate that keeps electrolytical barrier film, the electrolyte of dielectric substrate 7 that constitutes the cell device 2 of lithium rechargeable battery 1 can be a polymer dielectric.Polymer dielectric does not need barrier film, and comprises the matrix polymer of being made by ionic-conductive polymer and remain on the lithium salts as electrolytic salt in the matrix polymer.Owing to can use above-mentioned form similarly with the concrete form of lithium salts and the matrix polymer that constitutes polymer dielectric,, omit its repeat specification therefore for for simplicity.
[electrode terminal]
In lithium rechargeable battery 1, for to the outside batteries projected current, from laminated sheet 3 extraction electrode terminals (positive terminal 12 and negative terminal 14).
Without any restriction, can use the known materials that has been used for the electrode terminal of battery usually to the material that constitutes electrode terminal (positive terminal 12 and negative terminal 14).As the examples of material that constitutes electrode terminal, can mention the alloy of aluminium, copper, titanium, nickel, stainless steel (SUS), above-mentioned metal etc.Simultaneously, can use identical materials or different materials to positive terminal and negative terminal.
[external packing]
In lithium rechargeable battery 1, be not subjected in use from the outside its impact that applies and the influence that is not subjected to the environment deterioration in order to protect battery 1, expectation is contained in cell device 2 in the external packing such as laminated sheet.To external packing without any the restriction and can use known external packing.Transmit heat effectively and inside battery promptly is heated to the viewpoint of battery operated temperature range to battery from the thermal source of motor vehicles, preferably use the polymer-metal composite laminate of excellent thermal conductivity etc.
Though below with reference to description of drawings lithium rechargeable battery according to a preferred embodiment of the invention, the invention is not restricted to the foregoing description.
According to the lithium rechargeable battery 1 of first embodiment, conductive plate 13 is contacted with the equal face-face of the second conductive layer 16B with the first conductive layer 16A of negative electrode collector 8.In this connected, the conductive plate 13 that should note constituting the conductive part of multilayer collector body 8 was tabular and along the whole width horizontal expansion of conductive layer 16A and 16B, thereby contacts with 16B with conductive layer 16A.This makes and can obtain sufficient contact area between the conductive plate 13 and the first conductive layer 16A and between the conductive plate 13 and the second conductive layer 16B.Therefore, can when between the first conductive layer 16A and the second conductive layer 16B, keeping sufficient conductivity, realize having the thin collector body of sandwich construction by the wide contact area between the first conductive layer 16A and the second conductive layer 16B, therefore can reduce contact resistance not causing under the situation that the volume of battery energy density reduces, thereby obtain excellent battery capacity.
In addition, owing in folded up portion 17 and 18 places junction surface 19 is set, therefore acquisition face contact more reliably.
In addition, owing to be disposed between negative terminal 14 and the negative electrode collector 8 as the conductive plate 13 that is independent of the parts of negative terminal 14 and negative electrode collector 8, therefore conductive plate 13 can absorb the vibration of transmitting to negative electrode collector 8 from negative terminal 14 effectively, thereby makes and can improve durability and vibration resistance.Especially, because in the present embodiment, therefore folded up portion 17 and 18 overlapping in the mode in the space that one of them folded up portion is joined to another folded up portion can obtain excellent strength reliability.
In addition, though negative electrode collector has the insulating barrier of being made by insulating material and is placed in first conductive layer made by electric conducting material and the sandwich construction between second conductive layer in the present embodiment, positive electrode collector also can have similar sandwich construction.
Second embodiment
With reference to the lithium rechargeable battery of Fig. 3 A and Fig. 3 B explanation according to second embodiment.
The difference of the lithium rechargeable battery of the lithium rechargeable battery of second embodiment and first embodiment is: conductive plate 21 is formed with conductor folded up portion 22, thereby it is two-layer on the whole.That is to say, folding as the paper tinsel of the material of conductive plate 21 as shown in Figure 3A at central portion, make two side ends provide relative under the state in space betwixt in a side that is used for negative electrode collector 8 contacts, one of them side end has the table inboard of upset.Shown in Fig. 3 B, negative electrode collector 8 has the side end in the space of folded up portion of being bonded on 22, thereby negative electrode collector 8 is contacted with folded up portion 22.Like this, the facing surfaces that makes conductive plate 21 and the first conductive layer 16A and the second conductive layer 16B of negative electrode collector 8 the two the surface all face-face contact, win conductive layer 16A and the second conductive layer 16B are electrically connected to each other by means of conductive plate 21.In addition, conductive plate 21 and negative electrode collector 8 are engaged contiguously at folded up portion 22 place's face-faces, thereby form junction surface 23 by engaging with the similar ultrasonic wave of first embodiment.In the present embodiment, conductive plate (conductive part) 21 is bonded together with negative electrode collector (multilayer portion) 8, to form single multilayer collector body assembly.
Simultaneously, because except said structure, the lithium rechargeable battery of present embodiment has substantially the same structure with the lithium rechargeable battery of first embodiment,, omit its explanation therefore for for simplicity.
Can reduce contact resistance not causing under the situation that the volume of battery energy density reduces according to the lithium rechargeable battery of second embodiment, thereby obtain excellent battery capacity, can absorb the vibration of transmitting by means of conductive plate 21 simultaneously, thereby improve durability and resistance to vibration from negative terminal 14.
In addition, owing at folded up portion 22 places junction surface 23 is set, therefore acquisition face contact more reliably.
The 3rd embodiment
Except the negative electrode collector 8 shown in Fig. 4 A is provided with the opening 32, the 3rd embodiment and second embodiment are substantially similar.Opening 32 is formed on the position corresponding with junction surface 33, make junction surface 33 only by the passing through folding conductive plate 31 of conductive plate 31 toward each other and the part for preparing that is bonded together constitute.In the present embodiment, conductive plate (conductive part) 31 and negative electrode collector (multilayer portion) 8 is bonded together to form single collector body assembly.By this structure, make conductive plate 31 surface and the first conductive layer 16A and the second conductive layer 16B the two contact at the equal face-face in folded up portion 34 places, thereby the first conductive part 16A and the second conductive part 16B are electrically connected to each other by means of conductive plate 31.
Simultaneously, except said structure, the lithium rechargeable battery of present embodiment has substantially the same structure with the lithium rechargeable battery of first embodiment, for for simplicity, omits its repeat specification.
Can reduce contact resistance not causing under the situation that the volume of battery energy density reduces according to the lithium rechargeable battery of the 3rd embodiment, thereby obtain excellent battery capacity, and also can absorb the vibration of transmitting, thereby improve durability and resistance to vibration by means of conductive plate 31 from negative terminal 14.
In addition, owing to junction surface 33 is set, therefore can obtain face-face contact more reliably at folded up portion 34 places.
The 4th embodiment
With reference to the lithium rechargeable battery of Fig. 5 A and Fig. 5 B explanation according to the 4th embodiment.In the lithium rechargeable battery of the 4th embodiment, negative electrode collector 8 is formed with to make and is folded into the folded up portion 42 that surfaces opposite to each other contact with each other.In addition, conductive plate 41 does not have to form the folded up portion as first embodiment, and makes a side contacts of the formation folded up portion 42 of side of conductive plate 41 and negative electrode collector 8.In addition, conductive plate 41 is not only contacted with folded up portion 42, and the contact-making surface (non-folded up portion) 43 of a side that with the inboard that is positioned at folded up portion 42, promptly is positioned at the more close active material layer 9 of folded up portion 42 contact.Like this, conductive plate 41 is contacted with the equal face-face of the second conductive layer 16B with the first conductive layer 16A of negative electrode collector 8, thereby the first conductive layer 16A and the second conductive layer 16B are electrically connected to each other by means of conductive plate 41.In addition, by the ultrasonic wave joint conductive plate 41 and negative electrode collector 8 are engaged at folded up portion 42 places, thereby form first junction surface 44.In addition, by the ultrasonic wave joint conductive plate 41 and negative electrode collector 8 are engaged at contact-making surface 43 places, thereby form second junction surface 45.In the present embodiment, conductive plate (conductive part) 41 engages to form single multilayer collector body assembly with negative electrode collector (multilayer portion) 8.
Simultaneously, except said structure, the lithium rechargeable battery of present embodiment has substantially the same structure with the lithium rechargeable battery of first embodiment, for for simplicity, omits its repeat specification.
Similar with first embodiment, can reduce contact resistance not causing under the situation that the volume of battery energy density reduces according to the lithium rechargeable battery of the 4th embodiment, thereby obtain excellent battery capacity, and also can absorb the vibration of transmitting, thereby improve durability and resistance to vibration by means of conductive plate 41 from negative terminal 14.
In addition, owing to junction surface 44 and 45 are set, therefore can obtain face-face contact more reliably in folded up portion 42 and contact-making surface 43 places.
The 5th embodiment
With reference to the lithium rechargeable battery of Fig. 6 A and Fig. 6 B explanation according to the 5th embodiment.
In the lithium rechargeable battery of the 5th embodiment, as shown in Figure 6A, the distolateral otch 52 that is formed with from terminal longitudinal extension that conductive plate 51 is contacting with negative electrode collector 8.Negative electrode collector 8 is not formed with any folding or otch.Shown in Fig. 6 B, at the side that is formed with otch 52, conductive plate 51 is contacted with a surface (upper surface) of negative electrode collector 8 in a side of otch 52 (nearside among Fig. 6 A and Fig. 6 B), and contact with another surface (lower surface) of positive electrode collector 8 at the opposite side of otch 51 (among Fig. 6 A and Fig. 6 B than the distally).Like this, formation makes negative electrode collector 8 and conductive plate 51 mutual stacked laminated sections 53.Therefore, conductive plate 51 is contacted with the two equal face-face of the second conductive layer 16B with the first conductive layer 16A, thereby the first conductive layer 16A and the second conductive layer 16B are electrically connected to each other by means of conductive plate 51.In addition, similar with first embodiment, by the ultrasonic wave joint that applies ultrasonic energy conductive plate 51 and negative electrode collector 8 are engaged at laminated section 53 places, thereby form junction surface 54.In the present embodiment, conductive plate (conductive part) 51 engages to form single multilayer collector body assembly with negative electrode collector (multilayer portion) 8.
Simultaneously, except said structure, this lithium rechargeable battery has substantially the same structure with the lithium rechargeable battery of first embodiment, for for simplicity, omits its repeat specification.
Similar with first embodiment, can reduce contact resistance not causing under the situation that the volume of battery energy density reduces according to the lithium rechargeable battery of the 5th embodiment, thereby obtain excellent battery capacity, and also can absorb the vibration of transmitting, thereby improve durability and resistance to vibration by means of conductive plate 51 from negative terminal 14.
In addition, owing to be disposed between negative terminal 14 and the negative electrode collector 8 as the conductive plate 51 that is independent of the parts of negative terminal 14 and negative electrode collector 8, therefore conductive plate 51 can absorb the vibration of transmitting to negative electrode collector 8 from negative terminal 14, thereby makes and can improve durability and resistance to vibration.
The 6th embodiment
With reference to the lithium rechargeable battery of Fig. 7 A and Fig. 7 B explanation according to the 6th embodiment.
In the lithium rechargeable battery of the 6th embodiment, shown in Fig. 7 A, the distolateral otch 62 that is formed with from terminal longitudinal extension that negative electrode collector 8 is contacting with conductive plate 61.In addition, conductive plate 61 is not formed with any folding or otch.Shown in Fig. 7 B, at the side that is formed with otch 62, conductive plate 61 is contacted with a surface (upper surface) of positive electrode collector 8 in a side of otch 62 (nearside among Fig. 7 A and Fig. 7 B), and contact with another surface (lower surface among the figure) of negative electrode collector 8 at the opposite side of otch 62 (among Fig. 7 A and Fig. 7 B than the distally).Like this, formation makes negative electrode collector 8 and conductive plate 61 mutual stacked laminated sections 63.Therefore, conductive plate 61 is contacted with the two equal face-face of the second conductive layer 16B with the first conductive layer 16A, thereby the first conductive layer 16A and the second conductive layer 16B are electrically connected to each other by means of conductive plate 61.In addition, similar with first embodiment, by the ultrasonic wave joint that applies ultrasonic energy conductive plate 61 and negative electrode collector 8 are engaged at laminated section 63 places, thereby form junction surface 64.In the present embodiment, conductive plate (conductive part) 61 engages to form single multilayer collector body assembly with negative electrode collector (multilayer portion) 8.
Simultaneously, except said structure, this lithium rechargeable battery has substantially the same structure with the lithium rechargeable battery of first embodiment, for for simplicity, omits its repeat specification.
Similar with first embodiment, can reduce contact resistance not causing under the situation that the volume of battery energy density reduces according to the lithium rechargeable battery of the 6th embodiment, thereby obtain excellent battery capacity, and also can absorb the vibration of transmitting, thereby improve durability and resistance to vibration by means of conductive plate 61 from negative terminal 14.
In addition and since make conductive plate 61 and negative electrode collector 8 each other the laminated section 63 that contact of face-face be formed with junction surface 64, therefore can obtain face-face more reliably and contact.
The 7th embodiment
With reference to the lithium rechargeable battery of Fig. 8 A and Fig. 8 B explanation according to the 7th embodiment.
In the lithium rechargeable battery of the 7th embodiment, shown in Fig. 8 A, conductive plate 71 with distolateral being formed with of negative electrode collector 8 contact from two of terminal longitudinal extension parallel otch 72.Like this, the insertion tongue piece 73 of terminad extension longitudinally is set between two otch 72, and sidepiece tongue piece 74 is set at the opposition side that inserts tongue piece 73.In addition, the distolateral patchhole 75 that is formed with the seam shape form of cut or cuts of side direction or horizontal expansion that contacting with conductive plate 71 of negative electrode collector 8.Shown in Fig. 8 B, will insert tongue piece 73 and insert in this patchhole 75 from a side (upside Fig. 8 A and Fig. 8 B).Like this, a surface (upper surface among Fig. 8 A and Fig. 8 B) face-face of sidepiece tongue piece 74 and negative electrode collector 8 is contacted, make and insert tongue piece 73 and another surface (lower surface among Fig. 8 A and Fig. 8 B) face-face and contact.Like this, formation makes negative electrode collector 8 and conductive plate 71 mutual stacked laminated sections 76.Thereby, conductive plate 71 is contacted with the two equal face-face of the second conductive layer 16B with the first conductive layer 16A of negative electrode collector 8, thereby the first conductive layer 16A and the second conductive layer 16B are electrically connected to each other by means of conductive plate 71.In addition, similar with first embodiment, by the ultrasonic wave joint conductive plate 71 and negative electrode collector 8 are engaged at laminated section 76 places, thereby form junction surface 77.In the present embodiment, conductive plate (conductive part) 71 engages to form single multilayer collector body assembly with negative electrode collector (multilayer portion) 8.
Simultaneously, except said structure, this lithium rechargeable battery has substantially the same structure with the lithium rechargeable battery of first embodiment, for for simplicity, omits its repeat specification.
Similar with first embodiment, can reduce contact resistance not causing under the situation that the volume of battery energy density reduces according to the lithium rechargeable battery of the 7th embodiment, thereby obtain excellent battery capacity, and also can absorb the vibration of transmitting, thereby improve durability and resistance to vibration by means of conductive plate 71 from negative terminal 14.
In addition and since make conductive plate 71 and negative electrode collector 8 each other the laminated section 76 that contact of face-face be formed with junction surface 77, therefore can obtain face-face more reliably and contact.
The 8th embodiment
With reference to the lithium rechargeable battery of Fig. 9 A and Fig. 9 B explanation according to the 8th embodiment.
In the lithium rechargeable battery of the 8th embodiment, shown in Fig. 9 A, negative electrode collector 8 with distolateral being formed with of conductive plate 81 contact from two of terminal longitudinal extension parallel otch 82.The insertion tongue piece 83 of terminad extension longitudinally is set between two otch 82, and sidepiece tongue piece 84 is set at the opposition side that inserts tongue piece 83.In addition, the distolateral patchhole 85 that is formed with the seam shape form of cut or cuts of side direction or horizontal expansion that contacting with negative electrode collector 8 of conductive plate 81.Shown in Fig. 9 B, will insert tongue piece 83 and insert this patchhole 85 from a side (upside Fig. 9 A and Fig. 9 B).Like this, a surface (upper surface among Fig. 9 A and Fig. 9 B) face of sidepiece tongue piece 84 and conductive plate 81 is contacted, insert tongue piece 83 and another surface (lower surface among Fig. 9 A and Fig. 9 B) face and contact and make.Like this, formation makes negative electrode collector 8 and conductive plate 81 mutual stacked laminated sections 86.Thereby, conductive plate 81 is contacted with the two equal face-face of the second conductive layer 16B with the first conductive layer 16A of negative electrode collector 8, thereby the first conductive layer 16A and the second conductive layer 16B are electrically connected to each other by means of conductive plate 81.In addition, similar with first embodiment, by the ultrasonic wave joint conductive plate 81 and negative electrode collector 8 are engaged at laminated section 86 places, thereby form junction surface 87.In the present embodiment, conductive plate (conductive part) 81 engages to form single multilayer collector body assembly with negative electrode collector (multilayer portion) 8.
Simultaneously, except said structure, this lithium rechargeable battery has substantially the same structure with the lithium rechargeable battery of first embodiment, for for simplicity, omits its repeat specification.
Similar with first embodiment, can reduce contact resistance not causing under the situation that the volume of battery energy density reduces according to the lithium rechargeable battery of the 8th embodiment, thereby obtain excellent battery capacity, and also can absorb the vibration of transmitting, thereby improve durability and resistance to vibration by means of conductive plate 81 from negative terminal 14.
In addition and since make conductive plate 81 and negative electrode collector 8 each other the laminated section 86 that contact of face-face be formed with junction surface 87, therefore can obtain face-face more reliably and contact.
The 9th embodiment
With reference to the lithium rechargeable battery 101 of Figure 10 explanation according to the 9th embodiment.
In the lithium rechargeable battery 101 of the 9th embodiment, as shown in figure 10, negative electrode collector 102 comprises three layers of laminated section 105 and the conductive part 106 that is made of the first conductive layer 103A, insulating barrier 104 and the second conductive layer 103B.Conductive part 106 is configured to further extend and only made by electric conducting material towards the side of negative electrode collector 102 than the side of insulating barrier 104, thereby forms as one with the first conductive layer 103A and the second conductive layer 103B.That is to say that different with first to the 8th embodiment in the present embodiment, conductive plate (conductive part) 106 is not to be set to independently parts, but is configured to the part of negative electrode collector 102.Therefore, though in first to the 8th embodiment, construct single multilayer collector body assembly as the negative electrode collector 8 and the conductive plate 13 of individual components by engaging, but the negative electrode collector 102 among the 9th embodiment has formed laminated section 105 and conductive part 106, makes negative electrode collector 102 self form multilayer collector body assembly.
At least one negative electrode collector 102 is formed with bend 107 at side, to be connected with negative terminal 14.Insulating barrier 104 is arranged in the inboard (side of more close structure cell device) of bend 107.Conductive part 106 piles up mutually and is connected with negative terminal 14.In addition, conductive part 106 can be connected respectively with negative terminal 14, need not stacked mutually.
Lithium rechargeable battery 101 for the 9th embodiment, because not being provided with the conductive part 106 of any insulating barrier 104 and the first conductive layer 103A and the second conductive layer 103B forms as one, therefore do not need as first to the 8th embodiment, conductive part 106 to be connected with conductive plate, conductive part 106 can be connected with negative terminal 14 under the situation that does not increase contact resistance, simultaneously between the first conductive layer 103A and the second conductive layer 103B fully acquisition be electrically connected.In addition, present embodiment makes it possible to achieve thin multilayer collector body assembly and reduces contact resistance, thereby is not causing the battery capacity that obtains excellence under the situation that the volume of battery energy density reduces.
The tenth embodiment
With reference to the lithium rechargeable battery 111 of Figure 11 explanation according to the tenth embodiment.
Except insulating barrier 112 form extend than the example end of bend 113 more close negative electrode collectors, the lithium rechargeable battery of the lithium rechargeable battery of the tenth embodiment and the 9th embodiment is substantially similar.
For the lithium rechargeable battery 111 of the tenth embodiment, can obtain the effect identical with the effect of the 9th embodiment.In addition,, therefore increased the intensity of bend 113, thereby made and to improve durability and resistance to vibration because insulating barrier 112 forms at bend 113 places and also exists.
Variation
With reference to the routine according to a modification of this invention lithium rechargeable battery of Figure 12 explanation.
In the lithium rechargeable battery according to this variation, as shown in figure 12, negative electrode collector 8 is folding by two foldings along same direction of rotation at side, thereby constitutes three layers of folded up portion 91.Like this, the first conductive layer 16A of negative electrode collector 8 is contacted with the direct each other ground-face of the second conductive layer 16B.That is to say that the first conductive layer 16A and the second conductive layer 16B are from playing the function of conductive part in folded up portion 91 places and being electrically connected to each other.In addition, the folded up portion 91 of anticathode collector body 8 is carried out the ultrasonic wave joint to form junction surface 92.
For lithium ion collector body, the direct each other ground-face of the first conductive layer 16A and the second conductive layer 16B is contacted, thereby between the first conductive layer 16A and the second conductive layer 16B, obtain sufficient contact area according to variation.Therefore, can realize the multilayer collector body assembly that approaches, between the first conductive layer 16A and the second conductive layer 16B, realize being electrically connected fully by between the first conductive layer 16A and the second conductive layer 16B, realizing big contact area simultaneously, make and to reduce contact resistance not causing under the situation that the volume of battery energy density reduces, thereby make and to obtain excellent battery capacity.
In addition and since make the first conductive layer 16A and the second conductive layer 16B each other the folded up portion 91 that contact of face-face be provided with junction surface 92, therefore can obtain face-face reliably and contact.
In addition, owing between negative terminal 14 (with reference to Fig. 1) and negative electrode collector 8 folded up portion 91 is set, so folded up portion 91 can absorb the vibration of transmitting to negative electrode collector 8 from negative terminal, thereby feasiblely can improve durability and resistance to vibration.
Experimental test
Prepare the test piece 1 to 9 corresponding, and test piece 1 to 9 is carried out the test of tension test and measurement damping ratio with first to the 8th embodiment and variation.Shown in Fig. 2 B to Fig. 9 B, each in the test piece 1 to 8 is by constituting to constitute according to a negative pole and a conductive plate of selecting in the negative pole of the lithium rechargeable battery of each embodiment first to the 8th embodiment and the conductive plate from being bonded together.As shown in figure 12, test piece 9 is folded into three layers and a selected negative pole being bonded together by side and constitutes.In the test piece 1 to 9 any all is multilayer collector body paper tinsels (multilayer collector body assembly) that insulating barrier 15, Copper Foil that polyimides is used for negative electrode collector 8 are used for the first conductive layer 16A and the second conductive layer 16B.The conductive plate 13,21,31,41,51,61,71 and 81 of test piece 1 to 8 is Copper Foils.In the ultrasonic wave of arbitrary test piece engages, wave welding head of ultrasonic wave pressure contact test part under 13 to 15psi pressure is that 20KHz, output are that 70 to 80J ultrasonic wave formed that to engage width d be that 4mm, bonding length L are the junction surfaces 19,23,33,44,45,54,64,77 and 87 and junction surface 92 of 40mm in 0.5～0.7 second by apply frequency to testpieces.
In tension test, conductive plate 13,21,31,41,51,61,71 under the situation of test piece 1 to 8 with 81 and the end that is provided with collector body folded up portion 91 of negative pole 10 under the situation of test piece 9 along the direction that they are separated with negative pole 10 (along the left-hand of Fig. 2 A, Fig. 2 B to Figure 10 A, Figure 10 B to) be pulled with the hauling speed of 10mm/min, to measure load with respect to stroke (stroke).Result shown in the table 1.
Table 1
Intensity [N/mm]
Test piece 1 113
Test piece 2 118
Test piece 3 107
Test piece 4 98
Test piece 5 90
Test piece 6 95
Test piece 7 92
Test piece 8 89
Test piece 9 111
In the test of measuring damping ratio, 10 places are provided with acceleration transducer at negative pole, thereby can measure along with the acceleration of the direction of the Surface Vertical of negative pole 10, the conductive plate 13,21,31,41,51,61,71 under the situation of test piece 1 to 8 and 81 and the end that is provided with collector body folded up portion 91 of the negative pole under the situation of sample 9 use jump bit (impulse hammer) it to be vibrated perpendicular to its surface.Obtain vibration signal and response signal at this moment by jump bit and acceleration transducer, and this vibration signal and response signal are input to the fast fourier transform analyzer to calculate frequency response function.In addition, calculate damping ratio by frequency response function.Result shown in the table 2.
Table 2
Damping ratio [%]
Test piece 1 1.80
Test piece 2 1.89
Test piece 3 2.08
Test piece 4 1.82
Test piece 5 1.52
Test piece 6 1.60
Test piece 7 1.63
Test piece 8 1.55
Test piece 9 1.78
By the result of table 1, can confirm that any test piece all can obtain sufficiently high bond strength.In addition, by measuring the result of the test of damping ratio, confirm that any test piece all can obtain sufficiently high damping ratio and can have high-durability and high resistance to vibration.In addition, confirm that these test pieces, particularly corresponding with first to the 3rd embodiment test piece 1 to 3 can realize high bond strength, durability and resistance to vibration.
The full content of Japanese patent application P2007-182542 (submission on July 11st, 2007) and P2008-064318 (submission on March 13rd, 2008) is contained in this by reference.
Although the present invention has been described, has the invention is not restricted to the foregoing description with reference to specific embodiment of the present invention.Those skilled in the art can be out of shape the foregoing description and revises according to above-mentioned teaching.For example, though illustrated multilayer collector body assembly is used for negative electrode collector 8, this multilayer collector body assembly can be used for positive electrode collector 4.In addition, in the 9th sample, the folded up portion 91 of negative electrode collector 8 is folding along same direction of rotation to be enough more than twice, and for example this folded up portion 91 can be more than four layers.In addition, laminate type battery is not limited to lithium rechargeable battery.Scope of the present invention is limited by appended claims.

Claims (9)

1. battery, it comprises electrode and electrode terminal, this electrode comprises:
Multilayer collector body assembly, it has multilayer portion and conductive part, described multilayer portion comprises insulating barrier and is arranged in two conductive layers of the opposition side of described insulating barrier, described conductive part is made by electric conducting material, be connected with described two conductive layers, and further extend from the side of described two conductive layers, to be electrically connected with described electrode terminal towards the side of described electrode than described insulating barrier; And
A pair of active material layer, it is arranged in the opposition side of described multilayer portion,
Described insulating barrier extends to the set bend of described multilayer collector body assembly.
2. battery according to claim 1 is characterized in that, described conductive part and described two conductive layers form as one.
3. battery according to claim 2 is characterized in that, described conductive part and described multilayer portion have formed negative electrode collector, and described bend is formed on the side of described negative electrode collector.
4. battery according to claim 3 is characterized in that, the side that described insulating barrier forms than the more close described negative electrode collector of described bend extends.
5. according to each described battery among the claim 1-4, it is characterized in that described conductive part is a conductive plate.
6. according to each described battery among the claim 1-4, it is characterized in that described conductive part piles up mutually and is connected with negative terminal.
7. according to each described battery among the claim 1-4, it is characterized in that described conductive part is connected, need not overlapped respectively with negative terminal.
8. battery according to claim 1 is characterized in that, described multilayer portion is a negative electrode collector, and the electric conducting material that is used for described negative electrode collector is a copper.
9. battery according to claim 1 is characterized in that, the described insulating barrier of described multilayer portion is made by polyimides.
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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EP4080644A4 (en) * 2020-08-03 2023-09-20 LG Energy Solution, Ltd. Electrode assembly comprising disconnection prevention layer, and preparation method thereof

Families Citing this family (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102077392B (en) * 2009-01-26 2013-08-28 丰田自动车株式会社 Positive electrode for lithium secondary battery and use thereof
JP5124506B2 (en) * 2009-02-13 2013-01-23 シャープ株式会社 Secondary battery and method for manufacturing secondary battery
JP5474466B2 (en) * 2009-09-18 2014-04-16 三洋電機株式会社 Stacked battery
TWI466356B (en) 2010-02-17 2014-12-21 Toshiba Kk Battery and its manufacturing method
US20110206976A1 (en) * 2010-02-19 2011-08-25 Kyung-Mo Yoo Electrode assembly and secondary battery using the same
JP5690575B2 (en) * 2010-12-16 2015-03-25 シャープ株式会社 Non-aqueous secondary battery
JP5937969B2 (en) * 2011-01-07 2016-06-22 シャープ株式会社 Non-aqueous secondary battery
JP5693982B2 (en) * 2011-01-25 2015-04-01 シャープ株式会社 Non-aqueous secondary battery
KR101955414B1 (en) * 2011-01-28 2019-03-07 삼성에스디아이 주식회사 Secondary battery having lead member with cut portion
JP2013016321A (en) * 2011-07-01 2013-01-24 Sharp Corp Collector and nonaqueous secondary battery
JP5667537B2 (en) * 2011-08-22 2015-02-12 Ｊｍエナジー株式会社 Power storage device
JP6212846B2 (en) * 2011-10-04 2017-10-18 株式会社Ｇｓユアサ Electrochemical equipment
CN102437378A (en) * 2011-12-29 2012-05-02 广东国光电子有限公司 Winding forming method of lithium ion battery
EP2772978B1 (en) * 2012-05-23 2018-12-26 LG Chem, Ltd. Electrode assembly and electrochemical device comprising same
DE112013004251B4 (en) 2012-08-28 2021-01-28 Kabushiki Kaisha Toyota Jidoshokki Electricity storage device
EP2892097B1 (en) * 2012-08-30 2018-06-06 Kaneka Corporation Current collector for battery and battery using same
KR101561735B1 (en) * 2013-09-25 2015-10-19 주식회사 엘지화학 Method for electrode assembly
KR101876614B1 (en) * 2015-03-26 2018-07-09 주식회사 엘지화학 Electrode Assembly of Combination Structure
WO2017038042A1 (en) * 2015-08-31 2017-03-09 パナソニックＩｐマネジメント株式会社 Laminated battery
CN105355806B (en) * 2015-10-28 2018-02-23 广东烛光新能源科技有限公司 Electrochemical battery packaging material, battery using packaging material and preparation method of battery
JP6796256B2 (en) * 2017-02-23 2020-12-09 トヨタ自動車株式会社 Lithium ion secondary battery
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KR20210143234A (en) * 2019-03-22 2021-11-26 소테리아 배터리 이노베이션 그룹 인크. Battery connections and metallized film components in energy storage devices with internal fuses
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CN210805919U (en) * 2019-10-16 2020-06-19 宁德时代新能源科技股份有限公司 Secondary battery, electrode member for secondary battery, battery module, and device using secondary battery
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CN113066986A (en) * 2021-03-16 2021-07-02 珠海冠宇电池股份有限公司 Current collector, preparation method thereof and pole piece
JP7323055B2 (en) * 2021-03-31 2023-08-08 Tdk株式会社 Electrode for power storage device, power storage device and secondary battery
CN115995562A (en) * 2021-10-20 2023-04-21 华为技术有限公司 First electrode plate, bare cell, battery and electronic equipment
WO2023123500A1 (en) * 2021-12-31 2023-07-06 东莞新能源科技有限公司 Battery and electronic device
CN114373886A (en) * 2021-12-31 2022-04-19 东莞新能源科技有限公司 Battery and electronic equipment
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Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09120842A (en) * 1995-10-26 1997-05-06 Sony Corp Lithium ion secondary battery
JPH10255754A (en) * 1997-03-12 1998-09-25 Japan Storage Battery Co Ltd Connecting structure between current collector of electrode plate for battery and lead, and battery
JP4026993B2 (en) * 1999-08-10 2007-12-26 三洋電機株式会社 Non-aqueous electrolyte secondary battery

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CN110291658A (en) * 2017-02-03 2019-09-27 罗伯特·博世有限公司 Battery unit and battery module
CN110291658B (en) * 2017-02-03 2022-06-17 罗伯特·博世有限公司 Battery unit and battery module
EP4080644A4 (en) * 2020-08-03 2023-09-20 LG Energy Solution, Ltd. Electrode assembly comprising disconnection prevention layer, and preparation method thereof
CN113708018A (en) * 2021-09-02 2021-11-26 北京卫蓝新能源科技有限公司 Composite current collector tab welding structure, welding method and battery
CN113708018B (en) * 2021-09-02 2023-10-20 北京卫蓝新能源科技有限公司 Welding structure and welding method for composite current collector tab and battery
CN114497912A (en) * 2022-01-27 2022-05-13 北京卫蓝新能源科技有限公司 Tab structure, welding method and battery
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CN101916841B (en) 2013-01-02
JP5353032B2 (en) 2013-11-27
JP2009038004A (en) 2009-02-19
CN101345322B (en) 2011-07-27
KR20090006765A (en) 2009-01-15
KR101001841B1 (en) 2010-12-15
DE602008000179D1 (en) 2009-11-12

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