WO2024079507A1 - Batterie et son procédé de fabrication - Google Patents

Batterie et son procédé de fabrication Download PDF

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Publication number
WO2024079507A1
WO2024079507A1 PCT/IB2022/059786 IB2022059786W WO2024079507A1 WO 2024079507 A1 WO2024079507 A1 WO 2024079507A1 IB 2022059786 W IB2022059786 W IB 2022059786W WO 2024079507 A1 WO2024079507 A1 WO 2024079507A1
Authority
WO
WIPO (PCT)
Prior art keywords
current collector
metal case
battery
copper foil
anode plate
Prior art date
Application number
PCT/IB2022/059786
Other languages
English (en)
Inventor
Montree SAWANGPHRUK
Nattanon JORALEECHANCHAI
Thitiphum SANGSANIT
Kan HOMLAMAI
Surat PREMPLUEM
Worapol TEJANGKURA
Nichakarn ANANSUKSAWAT
Original Assignee
Vidyasirimedhi Institute Of Science And Technology
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 Vidyasirimedhi Institute Of Science And Technology filed Critical Vidyasirimedhi Institute Of Science And Technology
Priority to PCT/IB2022/059786 priority Critical patent/WO2024079507A1/fr
Publication of WO2024079507A1 publication Critical patent/WO2024079507A1/fr

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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
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
    • 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
    • H01M10/0431—Cells with wound or folded electrodes
    • 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
    • H01M50/107—Primary casings; Jackets or wrappings characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
    • 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
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • H01M50/117—Inorganic material
    • H01M50/119—Metals
    • 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
    • H01M50/545—Terminals formed by the casing of the 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
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/64—Carriers or collectors
    • H01M4/66—Selection of materials
    • H01M4/661—Metal or alloys, e.g. alloy coatings
    • 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

Definitions

  • a battery especially a cylindrical battery such as an 18650 battery, is regarded as an energy storage device that are widely used commercially since such battery is considered a power source that is potential for applications and provides high capacity and energy density per weight. It also has a longer cycle life than other types of battery.
  • Such battery is used in portable devices such as power banks for mobile phones, and in large electric devices such as plug-in hybrid vehicle or electric vehicle, etc.
  • the cylindrical battery used in these large electric devices require energy storage of about 100 kWh for running. To this end, the battery that has high energy storage value and is safe for use is necessary for satisfying the growing energy demand.
  • a cylindrical battery pack consists of a cap, a metal case and a jellyroll wound electrode assembly, which comprises at least one strip of a cathode plate coated with an active material being a lithium compound, a lithium salt or a phosphate compound such as a lithium nickel cobalt aluminium oxide material (LiNi x Co y Al z O2 : NCA) and a lithium nickel manganese cobalt oxide material (LiNi x Mn y Co z O2 : NMC), etc.; at least one strip of an anode plate coated with a graphite, graphene or carbon compound with at least one strip of a separator being disposed in the center in order to prevent the cathode plate and the anode plate from contacting each other, which would result in a short circuit.
  • an active material being a lithium compound, a lithium salt or a phosphate compound
  • an active material being a lithium nickel cobalt aluminium oxide material (LiNi x Co y Al z
  • the separator allows only the lithium ion to displace.
  • the separator is generally made of a plastic material such as polypropylene (PP) or polyethylene (PE), etc.
  • Such current collectors are made of a conductive material such as aluminium, copper and nickel, etc. They enable the electron to flow outside from the circuit.
  • An electrolyte which is an organic solution of salt having Li+ such as lithium hexafluorophosphate (LiPFe), lithium perchlorate (LiCICU), etc., enabling the passage of the lithium ion, which will be injected into such metal case.
  • US 2021210792 discloses a cylindrical battery comprising a wound electrode body, including at least one strip of the first electrode plate and at least one strip of the second electrode plate that are wound with a separator being disposed in the center.
  • a bottom cylindrical outer covering plate capable of supporting the electrode body and the first polarity terminal attached to an opening portion of an outer cover through a first insulating member to close the opening portion.
  • the electrode plates include a first core formed of a conductive material; and a first active material layer formed on the first core having the edge of the first core on the first polarity terminal side will be removed with respect to the edge of the first active material layer on the first polarity terminal side to create the first led-out portion.
  • the first led-out portion includes a first bent portion that is bent towards the radially inner or outer side of the electrode body.
  • a first surface of a first polarity current collector plate is in contact with the surface of the first bent portion at the first polarity terminal side.
  • the first polarity terminal is connected directly or via a conductive member to the second surface of the first polarity current collector plate.
  • CN 201877518 U discloses a cylindrical battery comprising a group of electrodes, a metal case, and an electrolyte, wherein the group of electrodes are disposed inside the metal case and the electrolyte is loaded into the metal case.
  • the battery further comprises a porous electrolyte storage body, which is disposed in the metal case and the electrolyte is absorbed inside the cavity of the porous electrolyte storage body.
  • the porous electrolyte storage body is inserted inside the cylindrical battery.
  • the porous electrolyte storage body is a porous cylinder that is placed at the center of the group of electrodes or the bottom of the group of electrodes.
  • the porous electrolyte storage body in such cylindrical battery can store more electrolytes and can supply them to the group of eletrodes along with drying the electrolytes in the group of electrodes to help making the turnover life of the cylindrical battery longer.
  • Such body also holds the group of battery electrodes to enable them to maintain the level of an assembly of the group of battery electrodes and keep a good contact with the metal case; thereby helping to reduce internal resistance and improve the stability of the cylindrical battery.
  • CN 214625136 U discloses a cylindrical lithium battery comprising a metal case, a battery cell disposed in the metal case and a cover disposed on the top opening of the metal case.
  • the metal case is welded to the anode of the battery cell.
  • the cover is welded to the positive electrode of the battery cell.
  • the battery cell is formed by winding a negative electrode plate, a diaphragm, and a positive electrode plate.
  • the diaphragm is placed in the metal case.
  • the bottommost edge of the negative electrode plate is a reserved exposed area with a predetermined height. The exposed area is bent towards the center of the battery cell to form the bent portion after the battery cell is welded.
  • the outer surface of the bent portion is in a point connection with the cathode current collector and the cathode current collector is in a point connection with the bottom surface inside of the metal case.
  • the lithium battery having such design is found to have an improved discharge rate, as well as reduced internal resistance and discharge temperature.
  • the present invention discloses a battery comprising: an electrode assembly comprising: an electrode body comprising a first end portion, a second end portion, and a cathode plate, an anode plate, and a separator that are stacked and wound together, with the separator being centered between the cathode plate and the anode plate; at least one strip of a first current collector; and at least two strips of a second current collector, a metal case having one open end for loading the electrode assembly internally; and a closure connected to the electrode assembly and sealing the open end of the metal case.
  • the first current collector has one end which is connected to the cathode plate and is disposed in a central region of the first end portion of the electrode body and another end which is connected to the closure.
  • the second current collector comprises a side current collector having one end which is connected to the anode plate and is disposed at an edge of the first end portion of the electrode body and another end which is connected to an inner surface of a side wall close to an edge of an open end of the metal case, and a bottom current collector having one end which is connected to the anode plate and is disposed at an edge of the second end portion of the electrode body and another end which is connected to an inner surface of a bottom wall of the metal case.
  • the second aspect of the present invention relates to a manufacturing method battery having the aforementioned characteristics, the method comprising:
  • the welding of the electrode assembly to the metal case comprises welding the protruding end of the first current collector to the closure and welding the protruding end of the side current collector of the second current collector to the inner surface of the side wall close to the end of the open end of the metal case and the protruding end of the bottom current collector of the second current collector to the inner surface of the bottom wall of the metal case.
  • the obtained battery can excellently withstand both high and low temperatures, and the internal resistance of the obtained battery is also reduced. This leads to a decrease in the loss of charging energy through the heat as well.
  • Fig. 1 is a vertical cross-section view of an exemplary battery of the present invention.
  • Fig. 2 is a vertical cross-section view of the electrode assembly of an exemplary battery of the present invention.
  • Fig. 3 is a top image showing a welding position of the current collector on the cathode plate according to an embodiment of the battery and the method according to the present invention.
  • Fig. 4 is a top image showing a welding position of the current collector on the anode plate according to an embodiment of the battery and the method according to the present invention.
  • Fig. 5 is a top image showing the back of the anode plate according to an embodiment of the battery and the method according to the present invention.
  • Fig. 6 is a top image showing the arrangement of the components of the electrode body to be wound and the winding direction according to an embodiment of the battery and the method according to the present invention.
  • Fig. 7 is an image of the wound electrode assembly according to an embodiment of the battery and the method according to the present invention.
  • Fig. 8 is a top image showing the welding of the bottom current collector of the anode plate to the inner surface of the bottom wall of the metal case according to an embodiment of the battery and the method according to the present invention.
  • Fig. 9 is a top image showing the welding of the side current collector of the anode plate to the inner surface of the side wall close to the edge of the open end of the metal case according to an embodiment of the battery and the method according to the present invention.
  • Fig. 10 is a side image showing the welding of the current collector of the cathode plate to the closure according to an embodiment of the battery and the method according to the present invention.
  • the present invention relates to a battery, especially a cylindrical battery, and a manufacturing method of said battery.
  • the components of the battery including the arrangement and the assembly of components are illustrated in Figs. 1-10.
  • the battery according to the present invention comprises: an electrode assembly (1) comprising: an electrode body (1.1) comprising a first end portion (1.1.1), a second end portion (1.1.2), and a cathode plate (1.1.3), an anode plate (1.1.4) and a separator (1.1.5) that are stacked and wound together, with the separator (1.1.5) being centered between the cathode plate (1.1.3) and the anode plate (1.1.4), at least one strip of a first current collector (1.2), and at least two strips of a second current collector (1.3); a metal case (2) having one open end for loading the electrode assembly (1) internally; and a closure (3) connected to the electrode assembly (1) and sealing the open end of the metal case (2) wherein the first current collector (1.2) has one end which is connected to the cathode plate (1.1.3) and is disposed in a central region of the first end portion (1.1.1) of the electrode body (1.1) and another end which is connected to the closure (3).
  • an electrode assembly (1) comprising: an electrode body (1.1)
  • the second current collector (1.3) comprises a side current collector (1.3.1) having one end which is welded to the anode plate (1.1.4) and is disposed at an edge of the first end portion (1.1.1) of the electrode body (1.1) and another end which is welded to an inner surface of a side wall close to an edge of the open end of the metal case (2) and a bottom current collector (1.3.2) having one end which is welded to the anode plate (1.1.4) and is disposed at an edge of the second end portion (1.1.2) of the electrode body (1.1) and another end which is welded to the inner surface of a bottom wall of the metal case (2).
  • the anode plate (1.1.4) comprises a copper foil having a coating (1.1.4.1), a front bare copper foil (1.1.4.2) and a back bare copper foil (1.1.4.3), wherein the front bare copper foil (1.1.4.2) and the back bare copper foil (1.1.4.3) are disposed on the same end of the anode plate (1.1.4), where the front bare copper foil (1.1.4.2) is the part where the second current collector (1.3) is welded.
  • the back bare copper foil (1.1.4.3) is the outermost part of the electrode body (1.1) when winding the cathode plate (1.1.3), the anode plate (1.1.4), and the separator (1.1.5) together.
  • the size of the bare copper foil can be adjusted according to the battery and the applications.
  • the front bare copper foil (1.1.4.2) may range from 2-3 cm in length and the back bare copper foil (1.1.4.3) may range from 5-8 cm in length.
  • the side current collector (1.3.1) of the second current collector (1.3) connected to the inner surface of the side wall close to the edge of the open end of the metal case (2) is distanced from the edge of the open end of the metal case (2) in a range from 0.8- 1.0 cm.
  • the battery according to the present invention is a cylindrical battery, of which the electrode body (1.1) and the metal case (2) are shaped as a cylinder, wherein the cathode plate (1.1.3) ranges from 60-100 cm in length and ranges from 5.4-5.8 cm in width, and the anode plate (1.1.4) ranges from 65-105 cm in length and ranges from 5.6-6.0 cm in width, and the separator (1.1.5) ranges from 70-110 cm in length and ranges from 5.8-6.2 cm in width.
  • the cathode plate (1.1.3) ranges from 60-100 cm in length and ranges from 5.4-5.8 cm in width
  • the anode plate (1.1.4) ranges from 65-105 cm in length and ranges from 5.6-6.0 cm in width
  • the separator (1.1.5) ranges from 70-110 cm in length and ranges from 5.8-6.2 cm in width.
  • An example of material suitable for making the first current collector (1.2) is an aluminum strip.
  • the material suitable for making the second current collector (1.3) is a nickel strip.
  • the material suitable for making the separator (1.1.5) is a ceramic film.
  • the metal case (2) may be made of a stainless-steel material and may further comprise grooves (2.1) disposed circumferentially on the outer surface close to the open end of the metal case (2).
  • the battery may further comprise an electrolyte solution (4) provided inside the metal case (2) and comprise an encapsulating portion (5) disposed such that it at least partially encapsulates the metal case (2) and the closure (3).
  • Another aspect of the present invention relates to the manufacturing method of the battery having the characteristics according to the invention as described above.
  • the manufacturing method of the battery according to the present invention comprises:
  • the welding of the electrode assembly (1) to the metal case (2) comprises welding the protruding end of the first current collector (1.2) to the closure (3) and welding the protruding end of the side current collector (1.3.1) of the second current collector (1.3) to the inner surface of the side wall close to the edge of the open end of the metal case (2) and the protruding end of the bottom current collector (1.3.2) of the second current collector (1.3) to the inner surface of the bottom wall of the metal case (2).
  • the anode plate (1.1.4) comprises the copper foil having the coating (1.1.4.1), the front bare copper foil (1.1.4.2) and the back bare copper foil (1.1.4.3), wherein at least two strips of the second current collector (1.3) are welded to the anode plate (1.1.4) in the front bare copper foil (1.1.4.2) region.
  • the front bare copper foil (1.1.4.2) and the back bare copper foil (1.1.4.3) are disposed on the same end of the anode plate (1.1.4).
  • the back bare copper foil (1.1.4.3) is the outermost part of the electrode body (1.1) when winding the cathode plate (1.1.3), the anode plate (1.1.4), and the separator (1.1.5) together, and the separator (1.1.5) is disposed between the cathode plate (1.1.3) and the anode plate (1.1.4).
  • the front bare copper foil ( 1.1.4.2) may range from 2-3 cm in length and the back bare copper foil (1.1.4.3) may range from 5-8 cm in length.
  • the welding of the side current collector (1.3.1) of the second current collector (1.3) to the inner surface of the side wall close to the edge of the open end of the metal case (2) is distanced from the edge of the open end of the metal case (2) in a range from 0.8- 1.0 cm.
  • the winding of the cathode plate (1.1.3), the anode plate (1.1.4), and the separator (1.1.5) together is carried out by using an automatic winding machine to obtain the cylindrical electrode body (1.1), and the metal case (2) is shaped as a cylinder as well.
  • welding the electrode assembly (1) is carried out by using an ultrasonic spot welding with an electric power ranging from 5.0-7.0 kW.
  • the method according to the present invention may further comprise additional steps such as making a circumferential indentation in the metal case (2) on the outer surface close to the open end of the metal case (2) to form the grooves (2.1), adding the electrolyte solution (4) to an inside of the metal case (2), and encapsulating the metal case (2) and the closure (3) at least partially with an encapsulating portion (5) by any suitable methods such as heating at a temperature ranging from 100-140°C.
  • Examples of the cathode plate and the anode plate were prepared by a known method of production.
  • the preparation of the cathode plate and the anode plate is carried out by coating a mixture of an active material, conductive material, and binder in a solution onto a substrate of the cathode plate and the anode plate, drying the coated substrate, and extruding the substrate to obtain a desired thickness.
  • the cathode plate and the anode plate obtained were assembled into an 18650 cylindrical battery.
  • the assembly started with cutting the cathode plate and the anode plate into 5.6 and 5.8 cm in width, respectively, and 60-100 cm in length using an automatic cutter.
  • both the cathode plate and the anode plate were wound together with the separator made of a ceramic film being centered between such two electrodes to prevent a short circuit using an automatic winding machine to obtain the electrode assembly.
  • the bare copper foil side with no current collector welded thereto is disposed on the outermost side when winding the cathode plate, the anode plate, and the separator together.
  • the wound electrodes were then loaded into a metal case.
  • a characteristic welding was performed by welding the protruding end of the side current collector of the anode plate to the inner surface of the side wall close to the edge of the open end of the metal case and the protruding end of the bottom current collector of the anode plate to the inner surface of the bottom wall of the metal case.
  • the cylindrical metal case having the electrode assembly loaded inside was then subjected to a grooving process. Then, a closure was welded to the protruding end of the current collector of the cathode plate.
  • the electrolyte was added in an amount of 5-6.5g per one battery to obtain a total weight of about 40-45 g in an atmosphere-controlled chamber with the humidity and oxygen level lower than 0.1 ppm.
  • the electrolyte solution used was lithium hexafluorophosphate which was dissolved in a mixture of ethyl carbonate, dimethyl carbonate, and ethyl methyl carbonate in a volume ratio of 1:1:1.
  • An additive which is fluoroethylene carbonate was also added in an amount of 4% by volume.
  • the battery was then charged using an automatic battery charger before wrapping the battery with a polyvinyl chloride (PVC) sheet at a temperature of 140°C in a belt oven.
  • PVC polyvinyl chloride
  • the exemplary cylindrical battery prepared from the above method was subjected to a safety test and internal resistance (IR) of the battery by comparing it to the comparative example, which is a conventional battery.
  • IR internal resistance
  • Example 1 The battery examples obtained according to the method of the present invention (Example 1-10) were subjected to a battery safety test using a temperature testing process (thermal test, T2) under the international testing standard UN 38.3.
  • Such temperature testing process was carried out by loading the battery for at least six hours in an environment with a temperature of 75°C and was continuously tested by loading the battery for at least six hours in the environment with a temperature of -40°C. The battery was then loaded for 24 hours in the environment with a temperature of 20°C.
  • Table 1 The test results are summarized in Table 1.
  • Table 1 shows the safety test results of the battery according to the present invention obtained by testing the battery examples of the invention at the temperature (T2) under the international testing standard UN 38.3.
  • the battery that passed the test must comply with requirements. That is, the battery had no weight loss, breakage, leakage, was not flammable, had no detachment, and had a potential difference during open circuit potential (OCV) not below 90% of the value prior to the test. However, the requirements regarding voltage cannot be applied to the sample cell and the battery in the total discharged condition.
  • the purpose of the test is to examine the completion of the battery assembly and the efficiency of the internal electrical connection of the battery obtained from the method of the present invention. From the test results as shown in T able 1 , it was found that the battery obtained from the present invention had a potential difference during the open circuit potential over 90% or over 4.00 volt, which passed the test according to all requirements.
  • Example 1-35 Examples of the battery obtained from the method of the present invention (Example 1-35) and examples of the comparative battery having a conventional internal structure (Comparative example 1-35) were subjected to determination of the internal resistance value.
  • the process of determining the internal resistance of the battery was carried out using the AC conductance test at a frequency of one kilohertz.
  • Table 2 shows the internal resistance value (IR) for examples of battery prepared according to the present invention, and examples of the comparative battery having a conventional general internal structure.
  • the battery having an interior design with the structure according to an embodiment of the present invention can reduce the internal resistance of the battery. This helps increasing the efficiency of the battery, reducing the loss of charging energy through the heat, and can prolong the cycle life of the battery. Also, the manufacturing method of the battery according to the present invention facilitating the battery manufacturing more conveniently and more simply; thereby increasing the opportunity of commercial and industrial applications.
  • the lithium-ion battery and the manufacturing method the same disclosed and claimed in the present invention intend to encompass the aspects of the invention obtained from actions, practices, modifications or alterations of any parameters without substantially different experiments from the present invention, and obtain those having properties, utilities and implementation similar to the aspects of the present invention corresponding to opinions of an ordinary person skilled in the art despite not being specifically identified in the claims. Therefore, what is interchangeable or similar to the aspects of the present invention include any slightly modifications or alterations apparent to an ordinary person skilled in the art should be considered as being under the intention, scope, and concept of the present invention as well.

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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)
  • Secondary Cells (AREA)

Abstract

L'invention concerne une batterie comprenant un ensemble électrode ayant un corps d'électrode comprenant une plaque de cathode, une plaque d'anode et un séparateur qui sont empilés et enroulés ensemble, un premier collecteur de courant et un second collecteur de courant ; un boîtier métallique ; et une fermeture. Le premier collecteur de courant a une extrémité reliée à la plaque de cathode et une autre extrémité reliée à la fermeture. Le second collecteur de courant comprend un collecteur de courant inférieur ayant une extrémité reliée à la plaque d'anode et une autre extrémité reliée à la surface interne du boîtier métallique, et le collecteur de courant inférieur ayant une extrémité reliée à la plaque d'anode et une autre extrémité reliée à la surface interne du boîtier métallique. L'invention concerne en outre le procédé de fabrication d'une telle batterie.
PCT/IB2022/059786 2022-10-12 2022-10-12 Batterie et son procédé de fabrication WO2024079507A1 (fr)

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PCT/IB2022/059786 WO2024079507A1 (fr) 2022-10-12 2022-10-12 Batterie et son procédé de fabrication

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PCT/IB2022/059786 WO2024079507A1 (fr) 2022-10-12 2022-10-12 Batterie et son procédé de fabrication

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6013389A (en) * 1997-12-05 2000-01-11 Matsushita Electric Industrial Co., Ltd. Cylindrical storage battery
US20060019158A1 (en) * 2004-07-21 2006-01-26 Sanyo Electric Co., Ltd. Battery having a collector plate
US20060088759A1 (en) * 2003-01-27 2006-04-27 Whanjin Roh Stacked lithium secondary battery and its fabrication
US20210210792A1 (en) * 2018-04-06 2021-07-08 Sanyo Electric Co., Ltd. Cylindrical battery

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6013389A (en) * 1997-12-05 2000-01-11 Matsushita Electric Industrial Co., Ltd. Cylindrical storage battery
US20060088759A1 (en) * 2003-01-27 2006-04-27 Whanjin Roh Stacked lithium secondary battery and its fabrication
US20060019158A1 (en) * 2004-07-21 2006-01-26 Sanyo Electric Co., Ltd. Battery having a collector plate
US20210210792A1 (en) * 2018-04-06 2021-07-08 Sanyo Electric Co., Ltd. Cylindrical battery

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