EP2494632A1 - Collecteur de courant comportant une zone de passage - Google Patents

Collecteur de courant comportant une zone de passage

Info

Publication number
EP2494632A1
EP2494632A1 EP10776307A EP10776307A EP2494632A1 EP 2494632 A1 EP2494632 A1 EP 2494632A1 EP 10776307 A EP10776307 A EP 10776307A EP 10776307 A EP10776307 A EP 10776307A EP 2494632 A1 EP2494632 A1 EP 2494632A1
Authority
EP
European Patent Office
Prior art keywords
current conductor
energy storage
substance
storage device
contact body
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP10776307A
Other languages
German (de)
English (en)
Inventor
Andreas Gutsch
Tim Schaefer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Li Tec Battery GmbH
Original Assignee
Li Tec Battery GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Li Tec Battery GmbH filed Critical Li Tec Battery GmbH
Publication of EP2494632A1 publication Critical patent/EP2494632A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • H01M4/70—Carriers or collectors characterised by shape or form
    • 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
    • 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
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/409—Separators, membranes or diaphragms characterised by the material
    • H01M50/449—Separators, membranes or diaphragms characterised by the material having a layered structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/46—Separators, membranes or diaphragms characterised by their combination with electrodes
    • 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

Definitions

  • the present invention relates to a current conductor, an electrode with this current collector, an electrochemical energy storage device with two of these electrodes, a battery with at least one such electrochemical energy storage device and a method for producing an electrode.
  • the invention will be described in the context of lithium-ion batteries. It should be noted that the invention may also be used regardless of the type of battery or regardless of the type of powered drive. Batteries having a plurality of electrochemical energy storage devices are known from the prior art. Some types have in common that their respective power density (kW / kg) is considered too low.
  • the invention is therefore based on the object to increase the power density of such a battery. This is achieved according to the invention by the teaching of the independent claims. Preferred developments of the invention are the subject of the dependent claims.
  • An inventive current conductor is provided for an electrode of an electrochemical energy storage device.
  • the current conductor has in particular a substantially prismatic shape.
  • the current conductor points at least one passage region through which electrons can enter the current conductor or exit from the current conductor.
  • the current conductor is characterized in that at least one of its passage regions has at least one plurality of first contact bodies.
  • At least one first contact body is substantially rod-shaped.
  • At least one first contact body has a free end and a bound end. The bound end is intended to be connected to the passageway area.
  • At least one first contact body extends from the at least one first passage region into the environment.
  • Under a current conductor in the context of the invention is a device to understand, which serves in particular the conduction of electrons.
  • the current conductor is used in particular for heat conduction.
  • the current conductor is preferably connected to an active electrode mass (or active material) and / or indirectly to an electrical consumer, in particular by means of a supply line or connecting cable.
  • the current conductor temporarily exchanges electrons with the active electrode mass and / or with the electrical load.
  • the current conductor preferably temporarily exchanges thermal energy with the active electrode mass and / or with the supply line.
  • the current conductor preferably has at least one electrically conductive material. Particularly preferably, at least one material of the current conductor is taken from a group which comprises carbon, aluminum, copper, nickel or any other metal.
  • An electrode in the sense of the invention is to be understood as meaning a device which serves in particular for receiving and delivering electrons.
  • the electrode serves to receive and deliver ions.
  • Electrode has a current collector and at least one active electrode mass.
  • one electrode is in electrical interaction with another electrode of opposite polarity by means of an electrolyte.
  • active electrode mass in the sense of the invention is to be understood as meaning a device which in particular serves to convert electrical energy into chemical energy and vice versa.
  • an active electrode material is used for storing energy in chemical form.
  • An electrochemical energy storage device in the sense of the invention means a device which serves in particular for receiving, discharging and / or storing electrical energy.
  • the electrochemical energy storage device has at least two electrodes of different polarity as well as an electrolyte.
  • the electrodes of different polarity are preferably separated from a separator.
  • the separator absorbs at least part of the electrolyte, is in particular ion-conducting, but not electron-conducting.
  • the electrochemical energy storage device has a plurality of electrodes, which are put together together with a plurality of separators to form an electrode stack. In this case, a separator between two electrodes of different polarity is arranged.
  • the current conductor has a substantially prismatic shape.
  • the shape of the current conductor is adapted to the geometry of the electrode, the electrochemical energy storage device and / or the associated battery.
  • the current conductor is designed as a thin-walled plate or foil.
  • the current conductor preferably has a connection region for connection, in particular with a supply line.
  • the current conductor preferably has a passage region, in particular for contacting an active electrode mass and for the passage of electrons.
  • a connection region and a passage region are assigned to a lateral surface of the current conductor.
  • a current conductor preferably has at least two passage regions.
  • a passage region in the sense of the invention means a region of a lateral surface of the current conductor.
  • the passage area adjoins, on the one hand, the core region of the current collector and, on the other hand, the environment of the current conductor.
  • a passage region preferably extends at least over the larger part of a lateral surface of the current conductor.
  • An inventive current conductor preferably has at least two passage regions. If the current conductor is designed as a thin-walled plate having two largest, mutually opposite lateral surfaces, at least one passage region is assigned to one of these largest lateral surfaces. Each of these largest lateral surfaces preferably has a passage region in each case.
  • a first contact body is to be understood as meaning a solid which, in particular, serves to conduct electrons.
  • a first contact body is preferably connected in an electrically conductive manner to a passage region of the current conductor.
  • electrons flow from an active electrode mass through this at least one first contact body into the current collector or flow in the opposite direction.
  • the first contact body in particular causes an enlargement of the contact area between the current conductor and the active electrode mass.
  • the first contact body has a bound end, which is in particular connected in a stock-locked manner to a passage region of the current conductor.
  • a first contact body has a free end, which lies opposite the bound end and extends into the environment.
  • a first contact body extends at an angle between 0 ° and 90 ° from a passage region.
  • the free end of a first contact body extends into an active electrode mass.
  • a passage region has a plurality, particularly preferably a multiplicity of first contact bodies.
  • a passage region is covered predominantly with first contact bodies. It is not necessary for a first contact body to extend along an axis of symmetry.
  • a first contact body has preferably an irregular, in particular production-related shape.
  • a first contact body is bent, kinked and / or twisted, at least in some areas.
  • a first contact body is substantially rod-shaped.
  • a first contact body preferably has the shape of a flat elevation similar to a hill, the shape of a flag, a rod or a tube.
  • a first contact body has a thickness of between 0.01 and 1 micrometer, more preferably between 0.01 and 0.1 micrometer.
  • a first contact body has a length between 0.1 to 100 microns, more preferably between 0.1 to 10 microns.
  • a first contact body has at least one electrically conductive material.
  • a first contact body comprises a material which is taken from a group comprising carbon, aluminum, nickel, copper, potassium titanate, titanium, carbide, silicon carbide, titanium dioxide, zinc oxide, magnesium oxide, tin oxide, indium oxide and also aluminum carbide.
  • a first contact body and a current conductor have at least one identical material.
  • a material is selected for a first contact body, which forms a durable chemical and / or physical bond with carbon, a component of the active electrode mass and / or forms a part of the separator or received.
  • first contact body With the lateral surfaces of the electrically conductive first contact body, electrons are available in comparison to the bare surface of the passage area enlarged passage area. In particular, current density and electrical resistance are reduced. Thus, the permeability of a lateral surface or a passage region of a current conductor for electrons is increased, the power density of the associated electrode and the associated battery cell is increased and the underlying object is achieved. Furthermore, a first contact body by means of a chemical and / or physical bond particularly improves the cohesion of the current conductor and the active electrode mass.
  • an inventive current conductor is at least partially covered by a first substance.
  • the passage region of the current collector is at least partially covered with a first substance.
  • the first substance has particles.
  • the first substance or its particles is electrically conductive.
  • the first substance or its particles is thermally conductive.
  • a passage region of the current collector is completely covered with a first substance.
  • the layer thickness of the first substance is preferably smaller than the wall thickness of the current conductor.
  • the coating with the first substance is formed so that only a few of its particles are arranged one above the other in it.
  • the particles are substantially spherically shaped.
  • the particles of the first substance are geometrically indeterminate and irregular.
  • the shape of the particles of the first substance is formed as chips.
  • the first substance is first powdered.
  • the diameter of a particle of the first substance is less than the wall thickness of the current conductor and / or less than the thickness of the coating with the first substance.
  • the diameter of a particle of the first substance is less than the length of a first contact body.
  • the first substance preferably has at least one electrically conductive material, particularly preferably carbon.
  • the first substance is a mixture which also has a constituent of an active electrode mass.
  • the first substance is a mixture which also has a constituent of the separator.
  • the coating with the first substance is a so-called hardcarbon layer.
  • the first substance covers a predetermined portion of a passage area.
  • the first substance is in the form of circular areas or spaced strips.
  • the active ve electrode mass applied to the first substance, so that the first substance is at least partially disposed between the current collector and the active electrode mass.
  • At least one first contact body advantageously extends into the first substance.
  • at least one first contact body extends through the first substance and projects, in particular with its free end, out of the first substance.
  • a first contact body is chemically and / or physically connected to the first substance or at least one of its particles.
  • the contact between the first substance and the at least one first contact body is designed such that at times a flow of electrons from an active electrode mass through this first contact body takes place in the current conductor. The flow of electrons can also be done in the opposite direction.
  • a first contact body acts in particular to increase the surface of the current conductor.
  • the tops of the first contact bodies are formed as mentioned above.
  • At least two of the first contact bodies are advantageously connected to one another.
  • their free ends are connected to each other.
  • the free ends of two first contact bodies are preferably connected to one another.
  • the connection of at least two first contact guides preferably takes place by knotting, crosslinking, weaving, braiding, mutual wrapping of the free ends.
  • two first bodies form a loop by means of connection of their free ends.
  • at least three first contact bodies are connected as mentioned above.
  • the passage region preferably has a multiplicity of interconnected first contact bodies.
  • most of the first contact bodies are each connected to at least one further first contact body.
  • the connections of at least two first contact bodies preferably take place unevenly and / or in dependence on the manufacturing method used.
  • first contact bodies are each with at least one connected further contact body.
  • An electrode which is intended in particular for an electrochemical energy storage device, advantageously has a current conductor according to the invention. Furthermore, the electrode has at least one active electrode mass.
  • the active electrode material is used to store energy, to deliver energy and / or to exchange electrons with the current collector. Furthermore, the active electrode material is used in particular for the conversion of electrical energy into chemical energy and vice versa.
  • the active electrode material is applied to the current collector.
  • the active electrode material is applied to a passage region of the current conductor.
  • a first substance is at least partially disposed between the active electrode mass and the current conductor.
  • At least some first contact bodies preferably extend into the active electrode mass.
  • particles of the active electrode mass are chemically and / or physically connected to some of the first contact bodies.
  • an active electrode mass intermittently exchanges electrons with the current collector, wherein this exchange takes place in particular within a passage region of the current conductor.
  • the shape of the electrode preferably corresponds substantially to the geometry of the current conductor.
  • the active electrode composition is pasty.
  • the layer thickness of the active electrode mass is preferably less than the wall thickness of the current conductor, as long as attention is paid to low electrical resistance and good heat transfer during the formation of the electrode.
  • the layer thickness of the active electrode mass is preferably greater than the wall thickness of the current conductor, in particular if attention is paid to the high energy density of the electrode.
  • the substantially plate-shaped current collector has two passage areas, which face each other.
  • an active electrode mass is applied to both passage regions.
  • the material of the active electrode masses preferably have the same composition.
  • the layer thicknesses of the two active electrode masses are preferably different. Thus, one active electrode mass is formed in terms of high power density, the other active electrode mass for a high energy density.
  • an electrochemical energy storage device has at least two electrodes, each with a current conductor according to the invention, as well as a separator.
  • one of the electrodes serves as a negative electrode or anode, while the second electrode serves as a positive electrode or cathode.
  • Said separator is ion-conducting and at least partially absorbs the electrolyte or the electrolyte solution.
  • the separator is not designed to conduct electrons.
  • the separator is arranged between the electrodes of different polarity such that the active electrode masses of the electrodes touch different contact areas of the separator. These contact areas are arranged on the lateral surfaces of the separator.
  • a separator of an electrochemical energy storage device has a contact region which is equipped with a plurality of substantially rod-shaped second contact bodies.
  • the second contact bodies differ in particular in that the latter can not conduct electrons.
  • the second contact bodies are each formed from an electrically non-conductive material.
  • the second contact bodies are longer and thicker than the first contact bodies.
  • the second contact bodies are only slightly shorter than the layer thickness of the adjacent active electrode mass.
  • a second contact body has an irregular shape, which in particular by surface enlarging depressions and / or Surveys.
  • a second contact body is formed with at least one undercut surface.
  • a battery has at least one electrochemical energy storage device with a current conductor according to the invention.
  • a battery has two or more of the aforementioned electrochemical energy storage devices.
  • the number of electrochemical energy storage devices of the battery is integer and divisible by four without remainder.
  • the electrochemical energy storage devices of the battery are electrically connected in series and / or parallel connection.
  • the battery has multiple groups of 4 or more series connected electrochemical energy storage devices. Preferably, these groups are connected to each other in series and / or in parallel.
  • a separator is preferably used which is not or only poorly electron-conducting, and which consists of an at least partially permeable carrier.
  • the support is preferably coated on at least one side with an inorganic material.
  • an organic material is preferably used, which is preferably designed as a non-woven fabric.
  • the organic material which preferably comprises a polymer and particularly preferably a polyethylene terephthalate (PET), is coated with an inorganic, preferably ion-conducting material, which is more preferably ion-conducting in a temperature range from -40 ° C to 200 ° C.
  • the inorganic material preferably comprises at least one compound from the group of oxides, phosphates, sulfates, titanates, silicates, aluminosilicates with at least one of the elements Zr, Al, Li, particularly preferably zirconium oxide.
  • the inorganic, ion-conducting material preferably has particles with a largest diameter below 100 nm. Such a separator is marketed, for example, under the trade name "Separion" by Evonik AG in Germany.
  • At least one electrode of the electrochemical energy storage device comprises a compound having the formula L 1 MPO 4 , where M is at least one transition metal cation of the first row of the Periodic Table of the Elements.
  • the transition metal cation is preferably selected from the group consisting of Mn, Fe, Ni and Ti or a combination of these elements.
  • the compound preferably has an olivine structure, preferably parent olivine, with Fe being particularly preferred.
  • At least one electrode of the electrochemical energy storage device comprises a lithium manganate, preferably spinel-type LiMn 2 O 4 , a lithium cobaltate, preferably LiCoO 2 , or a lithium nickelate, preferably LiNiO 2 , or a mixture of two or three of these oxides, or a lithium mixed oxide containing manganese, cobalt and nickel.
  • the cathodic electrode comprises at least one active electrode material or active material, wherein the active material comprises a mixture of a lithium nickel manganese cobalt mixed oxide (NMC), which is not in a spinel structure, with a lithium manganese oxide (LMO) in spinel structure.
  • NMC lithium nickel manganese cobalt mixed oxide
  • the active material comprises at least 30 mol%, preferably at least 50 mol% NMC and at least 10 mol%, preferably at least 30 mol% LMO, in each case based on the total moles of the active material of the cathodic electrode (ie not based on the cathodic electrode as a whole, which in addition to the active material may also comprise conductivity additives, binders, stabilizers, etc.).
  • NMC and LMO together account for at least 60 mole% of the active material, more preferably at least 70 mole%, more preferably at least 80 mole%, even more preferably at least 90 mole%, each based on the total moles of active material of the cathodic electrode (ie not based on the cathodic electrode in total, which in addition to the active material may also comprise conductivity additives, binders, stabilizers, etc.). It is further preferred that the active material consists essentially of NMC and LMO, that contains no other active materials in an amount of more than 2 mol%.
  • the material applied to the support is substantially active material, ie, 80 to 95% by weight of the cathodic electrode deposited material is said active material, more preferably 86 to 93% by weight, based on the total weight of the material Materials (ie, based on the cathodic electrode without a carrier in total, which in addition to the active material may still comprise conductivity additives, binders, stabilizers, etc.).
  • NMC NMC
  • NMC 3 (LMO) up to 3 (NMC): 7 (LMO)
  • 6 (NMC): 4 (LMO) up to 4 (NMC): 6 (LMO) being more preferred.
  • an electrode is produced using a current conductor according to the invention.
  • an inventive current conductor is first provided.
  • a first substance is applied to the current conductor, in particular to its passage region.
  • the first substance or its particles enter into a chemical and / or physical connection with a multiplicity of the first contact bodies.
  • the first substance is preferably applied in a predetermined pattern to the passage region of the current conductor.
  • the passage region of the current collector is advantageously covered only to a predetermined proportion with the first substance.
  • the first substance is applied with a layer thickness which is less than the wall thickness of the current conductor.
  • an active electrode mass is applied to the passage region of the current conductor.
  • the first substance is arranged at least in regions between the active electrode mass and the passage region of the current conductor.
  • the first substance is preferably a mixture which Carbon, a material of the active electrode material and / or a material of the separator.
  • a battery is provided with at least one current collector according to the invention for supplying a motor vehicle drive.
  • FIG. 1 shows a current conductor according to the invention in a side view (Fig.1a) and in a perspective view (Fig. B),
  • Fig. 2 shows an electrode with a current collector according to the invention with two
  • FIG. 3 shows an electrochemical energy storage device with two current conductors according to the invention and electrodes in an exploded view.
  • FIG. 1a shows a current conductor 1 according to the invention in a side view, not to scale, in section.
  • the current collector 1 has two passage regions 2, which are assigned to opposite lateral surfaces of the current collector 1.
  • a passage region 2 extends over the largest part of a lateral surface of the current collector 1.
  • Each of these passage regions 2 has a multiplicity of first contact bodies 3.
  • These first contact bodies 3 each have a free end 4.
  • the first contact bodies 3 extend from a passage region 2 into the surroundings of the current conductor 1.
  • a first contact body 3 has an irregular geometry.
  • the average diameter of the first contact bodies 3 is 20 to 30 nm Length of the individual first contact body 3 is less than the wall thickness of the current collector 1.
  • the first contact body 3 have predominantly aluminum carbide.
  • the current collector 1 has predominantly aluminum. It can be seen from the figure that some first contact bodies 3 are connected to at least one further first contact body 3 and in some cases also form loops. Other first contact body 3 are individually.
  • FIG. 1 shows a perspective view of a current conductor 1 with a passage region 2 shown hatched.
  • This passage region 2 is assigned to a lateral surface of the current conductor 1 and extends over the largest part of the lateral surface.
  • the same lateral surface is also assigned a connection region 9.
  • the passage area 2 is shown for simplified representation without first contact body. It is also not shown that the current conductor 1 is connected in the connection area 9 with a connection cable.
  • FIG. 2 shows an electrode 6 with a current conductor 1 according to the invention with two passage areas 2, 2a and with connection area 9, with two layers with first substance 5, 5a and with two active electrode masses 7, 7a in a side view.
  • a connecting cable 8 is screwed in the connection area 9 of the current collector 1.
  • the passage areas 2, 2 a are assigned to different and opposite lateral surfaces of the current conductor 1. From these passage regions 2, 2 a, first contact bodies 3 extend
  • the active electrode masses 7, 7a have a mixture of carbon and electrochemically active constituents.
  • FIG. 2 the thicknesses of the individual layers are shown only schematically and not to scale.
  • the layers of first substance 5, 5a have particles of different sizes. Only for a simplified representation of the particles are drawn as circles. In fact, the particles are irregular in shape, the shape of which is due to the manufacturing process used.
  • the active electrode material 7, 7a comprises a mixture of a lithium-nickel-manganese-cobalt mixed oxide (NMC), which is not in a spinel structure, with a lithium manganese oxide (LMO) in spinel structure.
  • NMC lithium-nickel-manganese-cobalt mixed oxide
  • LMO lithium manganese oxide
  • FIG. 3 shows an electrochemical energy storage device 10 with two electrodes 6, 6a and a separator 11.
  • the construction of the electrodes 6, 6a essentially corresponds to the structure of FIG. 2.
  • the separator 11 has second contact bodies 12, 12a, 12b. These second contact bodies 12, 12a, 12b extend from the contact areas 13, 13a into the surroundings.
  • the material of the separator 1 1 and the second contact body 12, 12 a, 12 b is substantially equal.
  • the second contact bodies 12, 12b are irregularly shaped. Only to illustrate an alternative embodiment, the second contact body 12a are shown. These extend substantially straight from the contact areas 13, 13a.
  • the second contact bodies 12, 12a, 2b extend into the respectively adjacent active electrode mass or active material.
  • the separator 11 contains a part of the electrolyte, in this case lithium ions.
  • the separator 1 1 was soaked with an electrolyte solution and the solvent evaporated.
  • the separator is made of Separion.
  • the pasty, active electrode mass 7 has LiFePO 4 in an olive structure and acts as a cathode or positive electrode.
  • the active electrode mass 7a acts as an anode and has an amorphous carbon modification, which is formed as a hardcarbon layer.

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

Abstract

Collecteur de courant (1) pour une électrode d'un dispositif d'accumulation d'énergie électrochimique, en particulier de forme sensiblement prismatique, comportant une zone de passage (2, 2a) à travers laquelle les électrons peuvent pénétrer dans le collecteur de courant (1) ou sortir de ce dernier.
EP10776307A 2009-10-29 2010-10-25 Collecteur de courant comportant une zone de passage Withdrawn EP2494632A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009051214A DE102009051214A1 (de) 2009-10-29 2009-10-29 Stromableiter mit einem Durchgangsbereich
PCT/EP2010/006509 WO2011050936A1 (fr) 2009-10-29 2010-10-25 Collecteur de courant comportant une zone de passage

Publications (1)

Publication Number Publication Date
EP2494632A1 true EP2494632A1 (fr) 2012-09-05

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP10776307A Withdrawn EP2494632A1 (fr) 2009-10-29 2010-10-25 Collecteur de courant comportant une zone de passage

Country Status (8)

Country Link
US (1) US20120321957A1 (fr)
EP (1) EP2494632A1 (fr)
JP (1) JP2013509676A (fr)
KR (1) KR20120093987A (fr)
CN (1) CN102640323A (fr)
BR (1) BR112012010065A2 (fr)
DE (1) DE102009051214A1 (fr)
WO (1) WO2011050936A1 (fr)

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WO2014003034A1 (fr) 2012-06-27 2014-01-03 東洋アルミニウム株式会社 Électrode positive destinée à des batteries secondaires, batterie secondaire, et procédé de fabrication d'une électrode positive destinée à des batteries secondaires

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JP3364968B2 (ja) * 1992-09-01 2003-01-08 株式会社デンソー 電 池
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CN102640323A (zh) 2012-08-15
BR112012010065A2 (pt) 2016-05-31
WO2011050936A8 (fr) 2012-06-07
US20120321957A1 (en) 2012-12-20
WO2011050936A1 (fr) 2011-05-05
KR20120093987A (ko) 2012-08-23
JP2013509676A (ja) 2013-03-14
DE102009051214A1 (de) 2011-05-12

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