EP2389696A1 - Pile galvanique pourvue d'une enveloppe ii - Google Patents

Pile galvanique pourvue d'une enveloppe ii

Info

Publication number
EP2389696A1
EP2389696A1 EP10701205A EP10701205A EP2389696A1 EP 2389696 A1 EP2389696 A1 EP 2389696A1 EP 10701205 A EP10701205 A EP 10701205A EP 10701205 A EP10701205 A EP 10701205A EP 2389696 A1 EP2389696 A1 EP 2389696A1
Authority
EP
European Patent Office
Prior art keywords
molded part
electrode stack
galvanic cell
sheath
galvanic
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Withdrawn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
EP10701205A
Other languages
German (de)
English (en)
Inventor
Claus-Rupert Hohenthanner
Jens Meintschel
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
Priority to EP10701205A priority Critical patent/EP2389696A1/fr
Publication of EP2389696A1 publication Critical patent/EP2389696A1/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Withdrawn legal-status Critical Current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
    • 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
    • H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
    • H01M50/529—Intercell connections through partitions, e.g. in a battery casing
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/4235—Safety or regulating additives or arrangements in electrodes, separators or electrolyte
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
    • H01M10/647—Prismatic or flat cells, e.g. pouch cells
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/654—Means for temperature control structurally associated with the cells located inside the innermost case of the cells, e.g. mandrels, electrodes or electrolytes
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/409—Separators, membranes or diaphragms characterised by the material
    • H01M50/446—Composite material consisting of a mixture of organic and inorganic materials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/409—Separators, membranes or diaphragms characterised by the material
    • H01M50/449—Separators, membranes or diaphragms characterised by the material having a layered structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/409—Separators, membranes or diaphragms characterised by the material
    • H01M50/449—Separators, membranes or diaphragms characterised by the material having a layered structure
    • H01M50/451—Separators, membranes or diaphragms characterised by the material having a layered structure comprising layers of only organic material and layers containing inorganic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/409—Separators, membranes or diaphragms characterised by the material
    • H01M50/449—Separators, membranes or diaphragms characterised by the material having a layered structure
    • H01M50/454—Separators, membranes or diaphragms characterised by the material having a layered structure comprising a non-fibrous layer and a fibrous layer superimposed on one another
    • 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
    • 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
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
    • 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
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
    • H01M50/557—Plate-shaped terminals
    • 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
    • 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
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49108—Electric battery cell making

Definitions

  • the present invention relates to a galvanic cell for a battery.
  • the invention will be described in the context of lithium-ion batteries for the supply of motor vehicle drives. It is pointed out that the invention can also be used independently of the chemistry, the type of galvanic cell or independently of the type of drive supplied.
  • Batteries with a plurality of galvanic cells for supplying motor vehicle drives are known from the prior art. During the operation of such a battery irreversible chemical reactions also occur in the galvanic cells. These irreversible reactions lead to a reduced charge capacity of the galvanic cells.
  • the invention has for its object to obtain the charging capacity of the galvanic cells of a battery over a higher number of charging cycles. This is achieved according to the invention by the subject matters of the independent claims. Preferred developments of the invention are the subject of the dependent claims.
  • a galvanic cell according to the invention in particular of a substantially prismatic shape, has at least one first electrode stack.
  • a first current collector is connected to a first electrode stack.
  • the galvanic cell has an enclosure which at least partially surrounds the first electrode stack. In this case, the first current drain extends ladder partially out of the cladding.
  • the galvanic cell has a second electrode stack and a second current collector.
  • the envelope has at least a first molded part and a second molded part.
  • One of the moldings has a higher thermal conductivity than the other moldings.
  • the molded parts are provided to at least partially enclose at least one electrode stack.
  • a galvanic cell Under a galvanic cell is in the present case to understand a device which also serves to deliver electrical energy.
  • the galvanic cell stores the energy in chemical form. Before delivering an electric current, the chemical energy is converted into electrical energy. Under certain circumstances, the galvanic cell is also suitable for receiving electrical energy, convert it into chemical energy and store it. This is called a rechargeable galvanic cell.
  • the conversion from electrical to chemical energy or vice versa is lossy and accompanied by irreversible chemical reactions.
  • the irreversible chemical reactions mean that areas of the galvanic cell are no longer available for energy storage and energy conversion.
  • the storage capacity or charging capacity of the galvanic cell decreases with increasing number of discharging and charging cycles. Even with increasing operating temperature of a galvanic cell, the irreversible chemical reactions increase.
  • the shape of a galvanic cell can be selected depending on the available space at the site.
  • the galvanic cell is formed substantially cylindrical or prismatic.
  • an electrode stack is to be understood as meaning the arrangement of at least two electrodes and an electrolyte arranged therebetween.
  • the electrolyte may be partially absorbed by a separator. Then the separator separates the electrodes.
  • at least one electrode more preferably at least one cathode, comprises a compound having the formula LiMPO 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.
  • At least one electrode comprises a lithium manganate, preferably LiMn 2 O 4 VOm spinel type, a lithium cobaltate, preferably LiCoO 2 , or a lithium nickelate, preferably LiNiO 2 , or a mixture two or three of these oxides, or a lithium mixed oxide containing manganese, cobalt and nickel on.
  • a lithium manganate preferably LiMn 2 O 4 VOm spinel type
  • a lithium cobaltate preferably LiCoO 2
  • a lithium nickelate preferably LiNiO 2
  • a mixture two or three of these oxides preferably LiNiO 2
  • the negative and positive electrodes are separated by one or more separators.
  • separator materials may, for example, also consist of porous inorganic materials which are such that a mass transport through the separator can take place perpendicular to the separator layer, whereas a mass transport parallel to the separator layer is hindered or even suppressed.
  • separator materials which consist of a porous inorganic material which is interspersed with particles or has particles at least on its surface which melt when a temperature threshold is reached or exceeded and at least locally reduce or close the pores of the separator layer.
  • Such particles may preferably be made of a material selected from a group of materials comprising polymers or mixtures of polymers, waxes or mixtures of these materials.
  • the separator layer is designed such that its pores fill due to a capillary action with the mobile component, which is involved as reactant in the chemical reaction, so that outside of the pores of the separator layer only a relatively small portion of the total amount of the mobile component present in the galvanic cell.
  • the electrolyte present in the galvanic cell or one of its chemical constituents or a mixture of such constituents is a particularly preferred starting material which according to a particularly preferred embodiment of the invention is as far as possible the entire porous one
  • a separator which is not or only poorly electron-conducting, and which consists of an at least partially permeable carrier.
  • the carrier is preferably coated on at least one side with an inorganic material.
  • at least partially permeable carrier is preferably an organic material is used, which preferably designed as a non-woven fabric is.
  • 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.
  • PET polyethylene terephthalate
  • 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.
  • the electrode stack also serves to store chemical energy and convert it into electrical energy.
  • the electrode stack is also capable of converting from electrical to chemical energy.
  • the electrodes are plate-shaped or foil-like.
  • the electrode stack may also be wound up and have a substantially cylindrical shape. One speaks then rather of an electrode winding.
  • the term electrode stack is also used for electrode windings.
  • a first electrode stack and a second electrode stack are preferably formed identically.
  • the electrode stack may also comprise lithium or another alkali metal in ionic form.
  • a current conductor means a device which also allows the flow of electrons from one electrode in the direction of another electrically active device, in particular an electrical consumer.
  • the current conductor also works in the opposite direction of the current.
  • a current collector is electrically connected to an electrode stack.
  • a current conductor can be connected to a connection cable.
  • the figure a Stromableiters is adapted to the shape of the galvanic cell or an electrode stack.
  • a current collector is plate-shaped and / or foil-like.
  • a first current conductor partially extends from the enclosure.
  • a second current collector may partially extend from the enclosure or may form a conductive connection between two electrode stacks.
  • Each electrode of the electrode stack preferably has its own current conductor or electrodes of the same polarity are connected to a common current conductor.
  • a current conductor is partially coated, wherein the coating is in particular designed to be electrically insulating.
  • the enclosure means a device which also prevents the escape of chemicals from the electrode stack into the environment. Furthermore, the sheath protects the chemical components of the electrode stack from undesirable interaction with the environment. For example, the sheath protects the electrode stack from the ingress of water or water vapor from the environment.
  • the envelope may be formed like a film. The envelope should affect the passage of heat energy as little as possible.
  • the enclosure has at least two molded parts. The casing is preferably at least partially adapted to the shape of the electrode stacks.
  • a molded part is to be understood as a solid which is adapted to the shape of an electrode stack. Under some circumstances, a molded part only acquires its shape in cooperation with a further molded part and / or an electrode stack. In the case of a cuboid electrode stack, the molded parts can be cut substantially rectangular. In this case, some dimensions of the molded part are preferably selected larger than certain dimensions of an electrode stack. When two moldings are placed around the electrode stack, the moldings partially protrude beyond the electrode stack and partially form a protruding edge. A border area a molded part preferably touches an edge region of a further molded part, preferably flat.
  • a molded part is formed as a flat plate, while another molded part nestles around the electrode stack to the first molded part.
  • a molding has a higher thermal conductivity than the other moldings and touches at least one electrode stack partially and thermally conductive.
  • heat energy is transferred out of an electrode stack or in an electrode stack.
  • a molded part is arranged between two electrode stacks and touches both electrode stacks heat-conducting.
  • the term "enclosing” is to be understood as meaning that a molded part can be brought into contact with another molded part in certain areas. At least one electrode stack comes to lie between the moldings involved. After enclosing, at least two shaped parts contact each other areally, preferably at least along a delimiting edge or an edge region of a molded part involved.
  • the battery is temporarily removed from high electrical currents, which can lead to a noticeable heating of the galvanic cells of a battery.
  • irreversible chemical reactions also increase in a galvanic cell.
  • the sheath of the galvanic cell is formed with a molded part, which is distinguished from the other parts of the sheath by a markedly increased thermal conductivity.
  • the thermal resistance can be markedly reduced and the heat flow in an electrode stack or from an electrode stack can be increased.
  • a heating power can be dissipated in a galvanic cell with a smaller temperature difference.
  • connection is, for example, non-positively or preferably cohesively.
  • these are joined together, for example by gluing or welding.
  • ultrasonic welding or laser welding can be used to connect at least two molded parts.
  • a pretreatment or activation of at least one of the surfaces of a molded part involved may be useful.
  • a non-positive or cohesive connection connects molded parts such that preferably a circumferential strip-shaped connection seals the space between the molded parts relative to the environment.
  • inserted strips can also be used, for example a sealing strip.
  • at least two molded parts are in particular connected in a first connection region in a materially bonded manner. This first connection region preferably extends along an edge region of a participant
  • the first connection region is strip-shaped. It is not necessary for the first connection area to wrap completely along the bounding edges of the molding. Before the connection of the moldings involved, further inserts can be arranged such that they are likewise connected to the moldings in a non-positive or cohesive manner. In particular, current conductors are inserted so that they partially extend from the enclosure. Thus, the envelope is gas-tight in the areas of the current collector against the environment.
  • at least one molded part of the envelope has a heat transfer region. This heat transfer region also serves to improve the heat transfer into or out of an electrode stack.
  • the heat transfer area of a first Tempe- riermitte! flows and / or is in heat-conducting contact with a tempering.
  • a heat transfer region of a molded part can also correspond to a predominant part of the surface of the molded part.
  • the heat transfer region can simultaneously serve for fastening the galvanic cell to a tempering element, for example by screwing, riveting, gluing or welding.
  • At least one molded part of the envelope is rigid.
  • This molding can hold an electrode stack, protect the electrode stack from mechanical damage or serve the mechanical connection of the galvanic cell with a receiving device.
  • this molding is formed as a metal plate or sheet metal.
  • the molded part can be stiffened, for example, by beads, raised edges or ribs.
  • At least one molded part of the envelope is made thin-walled.
  • the wall thickness for adapting the at least one molded part to a mechanical, electrical or thermal stress is formed.
  • the wall thickness does not have to be uniform.
  • a region of a thin-walled molded part with increased wall thickness can act as a heat sink or heat reservoir and thus contribute to heat energy being removed from or transported into the electrode stack.
  • the thin-walled design of a molded part also saves weight and space.
  • at least one molded part is formed as a film, particularly preferably as a composite film.
  • the materials used for the composite film include metals or plastics.
  • at least one molding of the sheath at least partially on a coating.
  • This coating also serves to adapt to stresses to which the molded part is exposed.
  • the coating is used for electrical insulation, to protect the molded part against the chemicals of the galvanic cell, to improve the adhesion of an adhesive bond, to improve the thermal conductivity or to protect against harmful effects from the environment.
  • a coating can cause chemical activation of the surface of the molding.
  • a coating is preferably made of a material that deviates from the material of the molded part.
  • the at least one molded part can also have a plurality of different coatings, which can also be arranged at different locations of the molded part. If a molded part is in electrical contact with an electrode stack, then a current collector is preferably electrically insulated from this molded part.
  • At least one molded part of the envelope has a recess, in particular a shell.
  • the molded part also gains an increased area moment of inertia or bending stiffness.
  • this recess at least partially accommodates an electrode stack. This also serves to protect an electrode stack.
  • the wall thickness of a molded part with a recess is preferably adapted to the stress.
  • Shaped parts of the sheath may have recesses which together form a space for receiving an electrode stack.
  • a molded part is formed as a deep-drawn or kaltf jetgepresstes sheet metal.
  • a molded part is formed as a deep-drawn plastic plate, composite film or plastic film.
  • a molded part of the envelope with a recess additionally has at least one first connecting region, which is provided for connection to a further molded part.
  • At least one molding advantageously has a second connection region.
  • the second connection area also serves to attach the galvanic Cell, for example, in a housing, in a frame or on a base plate.
  • a second connection region is formed such that the connection of the relevant molding with another body takes place only in a predetermined manner.
  • a second connection region has a geometric shape that corresponds to a region of another body.
  • a connection between the molding and the further body may be possible only in a predetermined manner.
  • the arrangement of through holes or threads may allow a connection only in a predetermined manner.
  • a second connection region is spatially separated from a first connection region.
  • At least one molded part of the sheath preferably has a plurality of separate second connecting regions.
  • the connection of the molded part with another body takes place, for example, by means of riveting, screwing, welding or gluing.
  • a second connection region of a molded part and a heat transfer region of the same molded article coincide.
  • the molded part is connected to, for example, a tempering element, a frame or a base plate of the battery housing.
  • At least two electrode stacks of a galvanic cell according to the invention are electrically conductively connected to one another.
  • the electrically conductive connection can be produced indirectly via the current conductors of the electrode stacks.
  • the connection can bring about an electrical series connection of the electrode stacks or their parallel connection.
  • a first current collector is connected to a first electrode stack and a second current collector is connected to a second electrode stack.
  • the electrically conductive connection of the current conductors or the electrode stacks can take place outside the enclosure.
  • two current conductors protrude beyond the edge of a molded part.
  • at least one current conductor itself extend in the direction of another Stromableiters and touch this partially electrically conductive or connected.
  • at least one current conductor can be coated in a partially electrically insulating manner.
  • At least one molded part has at least one breakthrough in particular within the covering.
  • a breakthrough is limited by edges, which preferably coated electrically insulating.
  • a second current collector is guided through a breakthrough of a molded part.
  • a second current collector is designed to seal a breakthrough and / or partially coated electrically insulating.
  • a region of a second current collector is at least partially electrically conductive with a first
  • At least two electrode stacks are electrically connected in series.
  • a galvanic cell with two electrode stacks can also have only two outgoing current conductors of different polarity.
  • At least two galvanic cells are grouped into a battery.
  • the at least two galvanic cells are preferably arranged parallel to one another.
  • Prismatic or cuboidal cells are preferably brought into contact with one another flatly and can form a substantially parallelepipedic packet.
  • the battery is assigned at least one tempering.
  • the tempering element has a predetermined temperature, which may be variable in time.
  • the temperature of the tempering element is preferably selected as a function of the temperature of an electrode stack of a galvanic cell.
  • a predetermined temperature gradient causes a heat flow in this electrode stack into or out of this electrode stack.
  • the tempering element exchanges heat energy with an electrode stack via at least one molded part or its heat transfer region, which is in contact with the tempering element.
  • the existing galley vanische cells in particular non-positively or cohesively be connected via a second connection region with the tempering.
  • the tempering element advantageously also has at least one first channel for the division of a predetermined temperature of the tempering element.
  • this channel is filled with a second temperature control.
  • a second temperature control medium flows through this at least one channel.
  • the flowing second temperature control leads to the tempering heat energy or dissipates heat energy.
  • the at least one tempering element is preferably operatively connected to a heat exchanger.
  • the heat exchanger dissipates heat energy from this tempering element or supplies heat energy to this tempering element, in particular by means of the second tempering means.
  • the heat exchanger or the temperature control can also interact with the air conditioning of a motor vehicle.
  • the heat exchanger may have an electric heater.
  • a battery is operated with at least two galvanic cells so that at least one molded part of a galvanic cell is flown by a first temperature control.
  • a first temperature control For example, ambient air or a refrigerant of the air conditioning system of the vehicle is used as the first temperature control medium.
  • the first temperature control means may have a higher or lower temperature than the at least one molding, its heat transfer region or as an electrode stack.
  • a galvanic cell according to the invention is produced in such a way that initially at least two molded parts of the envelope are combined around an electrode stack.
  • the current conductors of the galvanic cell can be inserted.
  • the two mold parts are then in particular materially connected to each other, so that a particular circumferential connection of at least two moldings is generated.
  • a gas-tight enclosure is preferably produced around the electrode stack.
  • at least one molded part is transferred by bending, in particular by raising at least one edge region of the molded part in a deformed state.
  • the first connection region is at least partially folded.
  • a dimension of the at least one molded part can be reduced.
  • the raised areas of the molding cause additional mechanical protection of the electrode stack.
  • an elevated edge region increases the area moment of inertia of the relevant molded part.
  • Fig. 1 is a perspective view of a galvanic cell according to the invention with two electrode stacks.
  • FIG. 2 shows an exploded view of a galvanic cell according to the invention with two electrode stacks.
  • Fig. 3 is a side view and a section through a galvanic cell according to the invention with two electrode stacks.
  • FIG 4 shows an enlarged section through a galvanic cell according to the invention with two electrode stacks.
  • FIG. 5 shows a perspective view of a galvanic cell according to the invention with two electrode stacks with connected current conductors.
  • 6 shows an enlarged section through a galvanic cell according to the invention with two electrode stacks and connected current conductors.
  • Fig. 7 shows a galvanic cell according to the invention with two electrode stacks, which are internally connected electrically in series.
  • FIG. 9 is a perspective view of a molded part with breakthrough of the galvanic cells of Figures 7 and 8.
  • FIG. 10 shows an enlarged detail of a galvanic cell according to the invention with two electrode stacks and internal series connection.
  • FIG. 1 shows a galvanic cell according to the invention with two electrode stacks.
  • Form part 5a is formed as a metal sheet. Along the lower edge of the molded part 5a is partially bent. The superscript area acts as a heat transfer area 7 and as a second attachment area 12.
  • an electrode stack (not shown) is arranged in each case.
  • the first current collector 3, 3a are connected to the first electrode stack. These extend in part from the envelope 4.
  • the envelope 4 further comprises two further mold parts 5, 5b, which are connected by means of a first connection region 6 with the interposed therebetween mold part 5a cohesively. The electrode stacks are secured against slipping.
  • Form 5a supports the electrode stack.
  • the molded part 5a serves to exchange heat energy with the electrode stacks of the galvanic cell.
  • a tempering with which the molded part 5a by means of the second connection region 12 is materially connected in a heat-conducting manner and by means of the heat transfer region 7.
  • FIG. 2 shows a galvanic cell according to the invention with two electrode stacks 2, 2 a before the enclosure is closed. It is also shown that sealing strips 16 are placed together with the current conductors 3, 3a between the molded parts 5, 5a, 5b prior to the production of the integral connection.
  • FIG. 3 shows a side view of a galvanic cell according to the invention with two electrode stacks according to FIG. 1.
  • the sectional view of the figure shows the electrode stacks 2, 2a. These each have a plurality of anode layers, cathode layers and separator layers. Of the Separator Anlagenen the electrolyte is partially absorbed.
  • FIG. 4 shows an enlargement of a part of the galvanic cell of FIG. 3. It is shown that an electrode stack has numerous anodes and cathodes, which are connected via current bands to the first current conductors 3, 3a. In this case, the connection is generated by welding. It is also shown that the electrodes 2, 2 a are arranged on both sides of the molded part 5 a and contact this molded part 5 a in a heat-conducting manner.
  • FIG. 5 shows a galvanic cell according to the invention with two electrode stacks, which are electrically interconnected.
  • the second current conductors 18, 18a are connected to one another cohesively and electrically conductively outside the enclosure 4.
  • the electrode stacks are connected in series.
  • FIG. 6 shows an enlarged section of the galvanic cell from FIG. 5. It is shown that the second current conductors 18, 18a are angled above the molded part 5a in such a way that they contact each other in a planar and electrically conductive manner.
  • FIG. 7 shows a galvanic cell according to the invention with electrode stacks which are interconnected. From the envelope 4 protrude only two first Current conductor 3, 3a of different polarity. It is not shown that the two electrode stacks are electrically connected within the enclosure 4 by means of a second current collector and connected in series. Also, the interconnection can be performed as a parallel connection.
  • FIG. 8 shows the galvanic cell from FIG. 7 prior to closing of the sheath 4.
  • the molded part 5a arranged in the center and designed as a metal sheet has an opening 9. The edges of this opening are coated electrically insulating 10.
  • the second current collector 18, 18 a are formed so that they touch each other in the region of the window of opening 9 electrically conductive. In this case, the second current conductors 18, 18a do not protrude from the enclosure 4.
  • FIG. 9 shows an enlarged detail of the flexurally rigid molded part 5a with a breakthrough 9.
  • the areal coating 10 of the molded part 5a is also shown along the edges of the aperture 9.
  • This coating 10 is made of a polymer material that is electrically insulating.
  • FIG. 10 shows an alternative embodiment of the galvanic cell according to FIG. 7. Shown is an enlarged section in the region of the opening 9 in the molded part 5a.
  • the two electrode stacks 2, 2 a are welded to a second current conductor 18 via discharge lugs.
  • the second current collector 18 is disposed within the aperture 9.
  • the second current conductor 18 is electrically separated from the molded part 5 a by the insulating coating 10.
  • the coating 10 and the second current conductor 18 are matched in terms of their dimensions to one another that the second current collector 18 also seals the opening 9.
  • the two spaces of the enclosure 4, which receive the electrode stacks 2, 2 a, can each be hermetically sealed.

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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)
  • Inorganic Chemistry (AREA)
  • Composite Materials (AREA)
  • Materials Engineering (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Battery Electrode And Active Subsutance (AREA)
  • Secondary Cells (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Cell Separators (AREA)

Abstract

L'invention concerne une pile galvanique, en particulier de forme sensiblement prismatique, présentant au moins un premier empilement d'électrodes. Un premier élément de dérivation de courant est relié à un premier empilement d'électrodes. Cette pile galvanique présente en outre une enveloppe qui entoure au moins partiellement un premier empilement d'électrodes. Un premier élément de dérivation de courant s'étend partiellement à partir de l'enveloppe. La pile galvanique présente par ailleurs un second empilement d'électrodes et un second élément de dérivation de courant. L'enveloppe comprend au moins une première pièce façonnée et une deuxième pièce façonnée. Une des pièces façonnées présente une conductivité thermique supérieure à celle des autres pièces façonnées. Les pièces façonnées sont destinées à entourer au moins partiellement au moins un empilement d'électrodes.
EP10701205A 2009-01-21 2010-01-18 Pile galvanique pourvue d'une enveloppe ii Withdrawn EP2389696A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10701205A EP2389696A1 (fr) 2009-01-21 2010-01-18 Pile galvanique pourvue d'une enveloppe ii

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE200910005497 DE102009005497A1 (de) 2009-01-21 2009-01-21 Galvanische Zelle mit Umhüllung II
EP20090012981 EP2221901A1 (fr) 2009-01-21 2009-10-14 Cellule galvanique dotée d'une enveloppe II
EP10701205A EP2389696A1 (fr) 2009-01-21 2010-01-18 Pile galvanique pourvue d'une enveloppe ii
PCT/EP2010/000257 WO2010083973A1 (fr) 2009-01-21 2010-01-18 Pile galvanique pourvue d'une enveloppe ii

Publications (1)

Publication Number Publication Date
EP2389696A1 true EP2389696A1 (fr) 2011-11-30

Family

ID=42077023

Family Applications (2)

Application Number Title Priority Date Filing Date
EP20090012981 Withdrawn EP2221901A1 (fr) 2009-01-21 2009-10-14 Cellule galvanique dotée d'une enveloppe II
EP10701205A Withdrawn EP2389696A1 (fr) 2009-01-21 2010-01-18 Pile galvanique pourvue d'une enveloppe ii

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP20090012981 Withdrawn EP2221901A1 (fr) 2009-01-21 2009-10-14 Cellule galvanique dotée d'une enveloppe II

Country Status (8)

Country Link
US (1) US20110318613A1 (fr)
EP (2) EP2221901A1 (fr)
JP (1) JP2012516004A (fr)
KR (1) KR20110122131A (fr)
CN (1) CN102292845A (fr)
BR (1) BRPI1006931A2 (fr)
DE (1) DE102009005497A1 (fr)
WO (1) WO2010083973A1 (fr)

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Publication number Priority date Publication date Assignee Title
KR101259757B1 (ko) * 2009-12-04 2013-05-07 주식회사 엘지화학 우수한 냉각 효율성과 콤팩트한 구조의 전지모듈 및 중대형 전지팩
DE102011011432A1 (de) * 2011-02-16 2012-08-16 Francesco Furlanetto Batteriezelle und Batterie für Elektrofahrzeuge
JP2012248381A (ja) * 2011-05-27 2012-12-13 Murata Mfg Co Ltd 電池
WO2013016426A1 (fr) 2011-07-25 2013-01-31 A123 Systems, Inc. Matières mélangées pour cathodes
DE102011109218A1 (de) * 2011-08-02 2013-02-07 Daimler Ag Einzelzelle und Batterie aus einer Mehrzahl von Einzelzellen
DE102012016022A1 (de) * 2012-08-13 2014-03-13 Li-Tec Battery Gmbh Wandlerzelle mit einem Zellgehäuse, Batterie mit wenigstens zwei dieser Wandlerzellen und Verfahren zum Herstellen einer Wandlerzelle
DE102012018035A1 (de) * 2012-09-13 2014-03-13 Daimler Ag Batterieeinzelzelle in Form einer bipolaren Rahmenflachzelle
JP6020920B2 (ja) * 2013-04-09 2016-11-02 株式会社デンソー 蓄電素子
US10115997B2 (en) * 2016-05-12 2018-10-30 Bosch Battery Systems Llc Prismatic electrochemical cell
DE102016008190A1 (de) 2016-07-05 2017-02-09 Daimler Ag Verfahren zur Herstellung eines elektrochemischen Energiespeichers
CN112886144B (zh) * 2019-11-30 2023-06-20 华为技术有限公司 一种分隔膜、电池组合及用电设备
CN114631221A (zh) * 2020-09-27 2022-06-14 宁德新能源科技有限公司 一种电化学装置及包含该电化学装置的电子装置
DE102022134076A1 (de) 2022-12-20 2024-06-20 Volkswagen Aktiengesellschaft Batterie mit optimierter Temperierbarkeit

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JP3727840B2 (ja) * 2000-09-29 2005-12-21 株式会社東芝 電池パック及び携帯用電子機器
JP4053802B2 (ja) * 2002-03-28 2008-02-27 Ｔｄｋ株式会社 電気化学デバイス
US20050255379A1 (en) * 2004-05-12 2005-11-17 Michael Marchio Battery assembly with heat sink
JP4830302B2 (ja) * 2005-01-25 2011-12-07 トヨタ自動車株式会社 二次電池
JP4890795B2 (ja) * 2005-06-16 2012-03-07 日本電気株式会社 フィルム外装電池及びそれが集合した組電池
JP2007018917A (ja) * 2005-07-08 2007-01-25 Nissan Motor Co Ltd 積層型電池および組電池

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Also Published As

Publication number Publication date
US20110318613A1 (en) 2011-12-29
EP2221901A1 (fr) 2010-08-25
CN102292845A (zh) 2011-12-21
DE102009005497A1 (de) 2010-07-22
KR20110122131A (ko) 2011-11-09
WO2010083973A1 (fr) 2010-07-29
BRPI1006931A2 (pt) 2016-09-06
JP2012516004A (ja) 2012-07-12

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