Classifications

• • 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
  • H01M10/0436—Small-sized flat cells or batteries for portable equipment
• • 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
  • H01M10/049—Processes for forming or storing electrodes in the battery container
• • 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
  • H01M50/10—Primary casings; Jackets or wrappings
  • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
  • H01M50/105—Pouches or flexible bags
• • 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
  • H01M50/10—Primary casings; Jackets or wrappings
  • H01M50/172—Arrangements of electric connectors penetrating the casing
  • H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
  • H01M50/178—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for pouch or flexible bag cells
• • 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
• • 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
  • H01M50/564—Terminals characterised by their manufacturing process
• • 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 method for producing an electrochemical cell, in particular a flat battery cell, as well as an electrochemical cell produced by such a method.
• DE 600 29 123 T2 shows a galvanic cell.
• an electric cell is received in the form of a roll pack within a metal sleeve.
• a positive and a negative current collector which are connected to electrodes of the roll pack.
• An annular plastic element is provided which electrically isolates the positive pole from the metal can.
• the invention has for its object to provide an improved method for producing an electrochemical cell.
• the electrochemical cell according to the invention comprises or has an electrode stack with at least two electrodes, which are separated from one another by a separator. Furthermore, the electrochemical cell has an enclosure consisting of at least two parts, which is liquid-tight. is closed. At least two current conductors are provided, which are electrically connected to the electrodes and extend through the enclosure to the outside.
• the current conductors are connected to a molded part by a shaping process.
• the molding is connected to the enclosure.
• the current collector preferably penetrates the enclosure in an opening of the enclosure.
• the opening of the envelope is preferably formed at an interface between the at least two parts of the envelope.
• the molded part can in particular seal together with the current collector the opening of the enclosure.
• the molding is connected to an opening of the enclosure with the enclosure, in particular connected to the opening such that the molding in particular closes together with the current collector the opening completely and / or liquid-tight. It can be made a cohesive connection between the molding and the parts of the enclosure.
• a current conductor means a device which also controls the flow of electrons from an electrode in the direction of a
• a current collector may be electrically connected to an electrode or active electrode mass of an electrode stack and further to a connection cable.
• the shape of the current conductor can be adapted to the shape of the electrode stack.
• a current collector is plate-shaped or foil-like.
• each electrode of an electrode stack has its own current conductor or electrodes of the same polarity are connected to a common current conductor.
• the envelope is preferably gas and liquid tight, so that aterial metal with the environment can not take place.
• the electrode stack is disposed within the enclosure. At least one Current conductors, in particular two current conductors, extend out of the enclosure and serve to connect the electrode stack. However, a plurality of current conductors can also extend out of the enclosure, in particular two or four current conductors.
• the outwardly extending current conductors preferably represent the positive pole connection and the negative pole connection of the electrochemical cell.
• an electrode stack is to be understood as a device which, as an assembly of a galvanic or electrochemical cell, also serves to store chemical energy and to deliver electrical energy.
• the electrode stack has a plurality of plate-shaped
• Electrodes at least two electrodes, namely an anode and a cathode, and a separator which at least partially receives the electrolyte.
• at least one anode, a separator and a cathode are stacked or stacked, wherein the separator is at least partially disposed between the anode and the cathode.
• This sequence of anode, separator and cathode can be repeated as often as desired within the electrode stack.
• the plate-shaped elements are wound into an electrode winding.
• electrode stack is also used for electrode windings
• the electrode stack has a plurality of electrode pairs and separators. Particularly preferably, some electrodes are connected to each other in particular electrically.
• the shaping process comprises at least one casting process, in particular an injection molding process.
• the casting process is an injection molding process.
• as the casting material is an insulating
• the molding can be made in particular of a material which has a certain hardness after the casting process. Closing the enclosure of an electrochemical cell is often associated with pressure applied to seams. Since the pressure can also be applied to a molded part, molded parts that have a certain hardness, more robust against the stresses of the manufacturing process.
• at least one current conductor is at least partially enclosed or encapsulated by the molded part during the shaping process. Under at least partially enclosed or partially encapsulated is to be understood in particular that the current conductor is at least annularly enclosed by the molding during the molding process or
• the current collector is preferably enclosed by at least two, in particular on all sides of a preferably one-piece molded part at least.
• the molded part preferably forms an annularly closed sheath, which can serve in particular as a support surface for the opening of the enclosure of the electrochemical cell.
• the molded part is preferably designed to form an insulating layer between a current conductor and at least a part of the envelope, in particular in the region of the opening of the envelope.
• ends of the current collector can protrude out of the molded part during and after the casting process.
• the protruding ends in particular represent a region of the current conductor which is arranged in a finished electrochemical cell within the enclosure of an electrochemical cell.
• another projecting end of the current conductor represents the region of the current conductor which is arranged on the finished electrochemical cell outside the envelope of the electrochemical cell.
• the molding process is a casting process, in particular an injection molding process
• the current conductor of the Molded part to be encapsulated during the molding process.
• a current conductor, in particular two or more current conductors are placed in a mold and then at least partially enclosed by a casting material, in particular encapsulated.
• At least two current conductors are at least partially enclosed, in particular encapsulated, by the same molded part during the casting process. Furthermore, further, in particular all current conductors of an electrochemical cell can be at least partially enclosed by the same molded part.
• the same molded part is to be understood in particular as meaning that the molded part forms a single body, namely a one-piece molded part
• a single molded part preferably encloses at least two current conductors
• the molded part may preferably hold the two current collectors at a distance from one another and thus act as spacers
• a molded part can be fixedly connected to two current conductors
• the molded part is in the form of a sealing band
• the molded part may be designed in the form of a sealing strip.
• a sealing strip encloses in particular two or more current conductors and these in each case preferably annularly, and in particular forms a circumferential surface which can serve to abut an opening of an enclosure of the electrochemical cell. Due to the fact that the sealing strip can enclose a plurality of current conductors, a narrowing, in particular at a fastening flange of the envelope, in the region between two adjacent current conductors can be avoided. Furthermore, the preparation of previously individually executed sealant can be summarized.
• the molded part can be designed in the form of a circumferential sealing frame.
• a sealing frame encloses in particular two or more current conductors.
• the sealing band is preferably firmly connected to two current conductors, in particular materially connected.
• the sealing frame itself has a circumferentially closed shape, on which two halves of an envelope can each be flanged from two different sides.
• the sealing frame preferably represents the interface of two, in particular shell-shaped, wrapping halves or shells.
• the molding is formed as an injection molded part.
• the molded part encloses at least one of the current conductors at least partially, in particular in the region of the arrester leadthrough.
• the molding preferably projects beyond the enclosure at least in the sealing area.
• protrusion means in particular that the shaped part extends in the direction along the current conductor in a direction from the cell interior to the cell exterior further in the direction of the cell exterior than the enclosure. It can be provided that in the region of an opening, the molding is generally designed to be longer than in another area of the enclosure. In this case, the molded part has a portion which is arranged outside the opening and is not in contact with a part of the enclosure.
• the envelope in the region of an opening, is made shorter than in another region of the envelope.
• the term longer or shorter refers in the present case to the expansion of the envelope or of the molded part in the direction from the cell interior to the cell exterior, ie in the direction of breakthrough of the opening.
• FIG. 1 shows an inventive electrochemical cell in a first embodiment
• FIG. 1 shows an inventive electrochemical cell 1 in a first embodiment.
• the electrochemical cell has an electrode stack 5, which is arranged within a casing 2. To the electrodes of the electrode stack 5, two current conductors 3 are connected, which penetrate the sheath 2 and thus represent the outer terminals of the electrochemical cell 1.
• the envelope 2 is formed from two counterparts shaped envelope parts, namely shells 4.
• Each shell 4 has a circumferential mounting flange 15. At the mounting flange 15, the two shells 4 are attached to each other and attached to each other. It can be seen that the shells 4 each have two recesses 10 on the mounting flange 15. In the assembled state of the shells 4, the two recesses 10 are in coincidence with each other, so that in each case an opening 11 of the enclosure 2 results.
• Enclosure 2 on which the openings 1 are provided, is referred to as sealing area 9.
• sealing area 9 Through the openings 1, the current conductors 3 extend from the inside of the cell to the outside.
• the current conductors 3 in the sealing area 9 have molded parts which, in the present embodiment, each have a shape
• Siegelbandes 6 configured.
• the sealing strip 6 is made of plastic and attached to the current collector 3 in an injection molding process, namely sprayed around the current conductor around. First, the current conductor was placed in a mold and then encapsulated by the injection molding material. For each
• Current conductor 3 is a separate sealing strip 6 is provided which surrounds the Stromabieiter annular.
• the sealing strip 6 fills together with the current collector 3 each have an opening 11 and it closes an annular space between the recesses 10 of the shells 4 and the current conductor.
• the shell 4 is made of a multilayer material and has a first layer 12 made of aluminum.
• a second layer 13, which is provided within the aluminum layer 12, is made of plastic and thus one
• the shell 4 may have been made by deep drawing.
• the sealing band 6 projects beyond the shells 4 along a
• Breakthrough direction which is parallel to the orientation of the Stromableiters 3.
• the sealing strip 6 extends further out of the opening 11 than the shell 4. This causes an improved insulation between the current conductor 3 and 4 shell.
• FIG. 2 shows a second embodiment of the electrochemical cell 1 according to the invention, which essentially corresponds to the first embodiment. Therefore, only the differences from the first embodiment will be discussed below.
• the molded part is shown in the form of a sealing strip 7, which is arranged around both current conductors 3 as an injection-molded part.
• the sealing strip 7 surrounds the current conductor 3 in each case in a ring.
• the sealing strip 7 electrically isolates the current conductor 3 from the shells 4.
• the sealing strip 7 fills together with the two Stromableitem 3, the opening 11. Since only one opening is provided, through which both current conductors 3 extend at the same time, no restriction 14 between two openings 11 is provided in the enclosure 2 according to the second embodiment. Also in the second embodiment, the sealing strip 7 projects beyond the shell 4 in the region of the opening 11.
• FIG. 3 shows an inventive electrochemical cell 1 in a third embodiment.
• the third embodiment largely corresponds to the second embodiment, wherein in the following only the differences from the second embodiment will be discussed.
• the sealing means are shown in the form of a circumferential sealing frame 8, which has a constant cross-sectional thickness D over the entire frame region.
• the sealing frame 8 encloses the two current conductors 3 annularly.
• the sealing frame 8 has a circumferentially closed shape, on each of which the two shells 4 are flanged with their respective mounting flanges 15 from two different sides.
• the sealing frame 8 has over its entire circumference on a constant cross-sectional thickness D. On the shells 4, which are brought into contact with the sealing frame 8, therefore, no recesses are provided, which form openings.
• a circumferential opening 11 is formed between the shells 4 of the sheath 5, which is represented by a constant gap between the two shells 4.
• the gap has a constant over the entire circulation cross-sectional thickness D and is completely closed by the rotating seal frame 8.
• the sealing frame 8 is identical in its dimensions to the expansions of the mounting flange 15 of Enclosure 2 configured and is disposed over the entire region of the circumferential mounting flange 15 between the two shells 4 of the enclosure 2.
• a circumferential opening 11 between the fastening shells 4 is produced by a spaced arrangement of the two shells 4 to each other, which is filled by the sealing frame 8 and by the sealed frame 8 current conductor 3.

Landscapes

• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Electrochemistry (AREA)
• General Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Manufacturing & Machinery (AREA)
• Sealing Battery Cases Or Jackets (AREA)
• Connection Of Batteries Or Terminals (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=42989842

Family Applications (1)

Country Status (8)

Families Citing this family (5)

Citations (1)

Family Cites Families (8)

• 2009
  • 2009-08-18 DE DE102009037849A patent/DE102009037849A1/de not_active Withdrawn
• 2010
  • 2010-08-17 EP EP10744891A patent/EP2467887A1/de not_active Withdrawn
  • 2010-08-17 WO PCT/EP2010/005042 patent/WO2011020595A1/de active Application Filing
  • 2010-08-17 KR KR1020127007049A patent/KR20120089464A/ko not_active Application Discontinuation
  • 2010-08-17 BR BR112012003773A patent/BR112012003773A2/pt not_active IP Right Cessation
  • 2010-08-17 CN CN2010800369393A patent/CN102484225A/zh active Pending
  • 2010-08-17 US US13/390,555 patent/US20120208077A1/en not_active Abandoned
  • 2010-08-17 JP JP2012525084A patent/JP2013502676A/ja active Pending

Patent Citations (1)

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