WO2024099782A1 - Enroulement d'électrode pour une cellule de stockage d'énergie, cellule de stockage d'énergie et procédé de production - Google Patents

Enroulement d'électrode pour une cellule de stockage d'énergie, cellule de stockage d'énergie et procédé de production Download PDF

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Publication number
WO2024099782A1
WO2024099782A1 PCT/EP2023/079863 EP2023079863W WO2024099782A1 WO 2024099782 A1 WO2024099782 A1 WO 2024099782A1 EP 2023079863 W EP2023079863 W EP 2023079863W WO 2024099782 A1 WO2024099782 A1 WO 2024099782A1
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WO
WIPO (PCT)
Prior art keywords
electrode
ions
region
current conductor
energy storage
Prior art date
Application number
PCT/EP2023/079863
Other languages
German (de)
English (en)
Inventor
Roland Jung
Original Assignee
Bayerische Motoren Werke Aktiengesellschaft
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 Bayerische Motoren Werke Aktiengesellschaft filed Critical Bayerische Motoren Werke Aktiengesellschaft
Publication of WO2024099782A1 publication Critical patent/WO2024099782A1/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
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/64—Carriers or collectors
    • H01M4/70—Carriers or collectors characterised by shape or form
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—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
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators

Definitions

  • the present invention relates to an electrode winding for an energy storage cell, an energy storage cell and a method, in particular a computer-implemented method, for producing an electrode winding.
  • the present invention further relates to a battery module with such energy storage cells and a motor vehicle with such a battery module.
  • battery cells especially battery cells, especially lithium-ion battery cells
  • Battery cells for storing electrical energy play a central role in the field of so-called electromobility, both in vehicles with purely electric drives and in vehicles with hybrid drives.
  • a battery module for a 12V starter battery can have four battery cells, whereas a high-voltage storage device can have several battery modules.
  • Cylindrical lithium-ion battery cells can have an electrode winding in which the electrodes including the separator are wound spirally around a winding core in the sequence separator-anode-separator-cathode.
  • the electrodes can contain a mixture of active material, binder and conductive additives. This mixture can be applied as a thin layer to both sides of a current collector.
  • the coating can be applied to both sides with either an identical load (symmetrical coating) or a slightly different load (asymmetrical coating). It is necessary that the ratio of the capacity per area (in mAh/cm 2 ) from anode to cathode (N/P ratio) is greater than 1 in order to prevent so-called "lithium plating". At the same time, the N/P ratio should not be too large in order to keep irreversible lithium losses due to so-called SEI (solid electrolyte interface) formation on the anode as low as possible.
  • SEI solid electrolyte interface
  • the outer electrode Due to the spiral winding of the electrode coil, the outer electrode can deliver or absorb a larger capacity than the inner electrode opposite it due to the larger radius. This leads to a deviation from a desired N/P ratio. For purely geometric reasons, the deviation from this N/P ratio is greatest in the innermost turns.
  • the front and back of at least one electrode can be coated with slightly different loading (asymmetrical coating).
  • an asymmetrical coating is more complex to produce than a symmetrical coating because the loading on the front and back must be different and the two sides should always be clearly identifiable. This assignment is difficult to make, for example, by visual inspection.
  • an electrode winding according to claim 1 an energy storage cell, a battery module with such energy storage cells, a motor vehicle with such a battery module and a method for producing an electrode winding.
  • a first aspect of the solution relates to an electrode coil for an energy storage cell, comprising: (i) a first electrode with a first current conductor, which has a first electrically conductive material that is impermeable to ions during operation of the energy storage cell; (ii) wherein the first current conductor has two opposite sides, each coated with a first active material in which ions, in particular lithium ions, can be stored; (iii) a second electrode with a second current conductor, which has a second electrically conductive material that is impermeable to ions during operation of the energy storage cell; (iv) wherein the second current conductor has two opposite sides, each coated with a second active material in which the ions can be stored; (v) a separator arranged between the first electrode and the second electrode, whereby the first electrode and the second electrode are electrically insulated from one another; (vi) wherein the first current conductor has a first region which is designed to be permeable to ions, so that the ions can pass from one side to the
  • a condition A or B is satisfied by one of the following conditions: A is true (or exists) and B is false (or not exists), A is false (or not exists) and B is true (or exists), and both A and B are true (or exists).
  • the term “configured” or “set up” to fulfil a specific function (and respective variations thereof) as used here is to be understood as meaning that the corresponding device is already in a configuration or setting in which it can carry out the function or it is at least adjustable - i.e. configurable - so that it can carry out the function after the corresponding setting.
  • the configuration can be carried out, for example, by setting parameters of a process sequence or switches or similar to activate or deactivate functionalities or settings.
  • the device can have several predetermined configurations or operating modes so that configuration can be done by selecting one of these configurations or operating modes.
  • electrode coil refers in particular to a device which, as an assembly of a galvanic cell, in particular a battery cell, also serves to store chemical energy and release electrical energy.
  • the electrode coil has at least two electrodes, namely an anode and a cathode, and a separator, in particular an electrically insulating separator, which can at least partially accommodate an electrolyte.
  • the anode, separator and cathode are wound around an axis to form an electrode coil.
  • the separator is arranged between the anode and the cathode so that the anode and cathode are electrically insulated from one another.
  • the electrodes can have a current conductor, in particular made of Al for the cathode and of Cu for the anode, wherein a thin layer made of a mixture of an active material, binder (e.g. PVDF, PTFE, CMC, SBR, Li-PAA, PAA, etc.) and conductive additives (carbon black, CNTs, carbon fibers, etc.) can be applied to both sides of the current conductor.
  • the current conductor can in particular be designed as a film.
  • active material refers in particular to a material that can be electrochemically active and that is suitable for coating electrodes for electrode windings for battery cells and in which ions, in particular lithium ions, can be stored.
  • the active material for the cathode can in particular comprise NMC, NCA, NCMA, LCO, LFP, LMFP, LMO, LNMO or another material.
  • the active material for the anode can in particular comprise graphite, SiOx, SiC, Si, Sn, SnOx or another material.
  • separatator layer or a “separator” as used here is to be understood in particular as an electrically insulating device which separates and spaced apart an anode from a cathode.
  • a Separator layer applied to an anode layer and/or a cathode layer.
  • the separator layer is designed as an independent body.
  • the separator layer or the separator can also at least partially accommodate an electrolyte, wherein the electrolyte preferably contains lithium ions.
  • the electrolyte can also be electrochemically connected to adjacent layers of an electrode stack or electrode coil.
  • the shape of a separator essentially corresponds to the shape of an anode of the electrode stack.
  • a separator is designed to be thin-walled, particularly preferably as a microporous film.
  • the separator layer or the separator is wetted with an additive, which also increases the mobility of the separator layer or the separator.
  • the separator can have a ceramic coating, in particular a base film, the polyethylene and one-sided or two-sided coating with, for example, Al2O3, as well as a so-called binder.
  • the wetting is carried out with an ionic additive.
  • the separator layer or the separator extends at least in some areas over a boundary edge of at least one electrode. Particularly preferably, the separator layer or the separator extends beyond all boundary edges of adjacent electrodes.
  • electrolyte refers to a liquid or solid material through which ions can be conducted, thereby enabling current to be transported between electrodes of a battery, in particular between a cathode and an anode.
  • the electrolyte must be ionically conductive, i.e. conduct the electrical current by transporting charged atoms or molecules (ions).
  • the electrolyte is advantageously chemically stable against decomposition in a wide temperature window and electrochemically stable in the largest possible voltage window. Ideally, it is non-toxic and non-flammable and has at least a high flash point and low heat of combustion. Liquid systems may be preferred over polymer and solid electrolytes due to better conductivity.
  • the electrode winding according to the first aspect it can be achieved that during operation of the energy storage cell using an electrolyte, ions are transferred from one side to the other side of the opposite sides of the first current conductor can pass through the permeable first region. This allows an unequal existing capacity of the opposite sides to be balanced out, caused by an unequal area of a surface arranged radially further inwards in relation to the longitudinal axis compared to a surface arranged radially further outwards.
  • the first region is formed at a first end region of the first current conductor, radially adjacent to the longitudinal axis. This can increase the effect of the compensation, since the ratio of the areas in the first end region is larger than in areas arranged radially further outwards.
  • the first end region has a first edge region for electrical contacting, which is designed to be impermeable to ions.
  • the first edge region has additional material compared to a permeable region and can therefore be better connected electrically to another component, in particular by welding.
  • the first end region has a first edge region for electrical contacting, which is designed to be permeable to ions. This allows the first end region to be manufactured uniformly throughout.
  • the first region has recesses, in particular recesses with a circular or square cross-section. This makes it possible for the ions to pass through the first current conductor.
  • the second current conductor has a second region which is designed to be permeable to ions, so that the ions can pass from one to the other of the two opposite sides of the second current conductor.
  • This can ensure that during operation of the energy storage cell under Use of an electrolyte allows ions to pass from one side to the other side of the opposite sides of the second current conductor through the permeable first region.
  • This allows an unequal existing capacitance of the opposite sides to one another, caused by an unequal area of a surface arranged radially further inwards in relation to the longitudinal axis to a surface arranged radially further outwards, to be balanced out.
  • this creates an ion-permeable region in both the first current conductor and the second current conductor, whereby the capacitances between the electrodes can be better balanced.
  • the second region is formed at a second end region of the second current conductor, radially adjacent to the longitudinal axis. This can increase the effect of the compensation, since the ratio of the areas in the second end region is larger than in areas arranged radially further outwards.
  • the second end region has a second edge region for electrical contacting, which is designed to be impermeable to ions.
  • the second edge region has additional material compared to a permeable region and can therefore be better connected electrically to another component, in particular by welding.
  • the second end region has a second edge region for electrical contacting, which is designed to be permeable to ions. This allows the second end region to be manufactured uniformly throughout.
  • the second region has recesses, in particular recesses with a circular or square cross-section. This makes it possible for the ions to pass through the second current conductor.
  • a second aspect of the solution relates to an energy storage cell, in particular a lithium-ion battery cell, comprising a cylindrical cell housing in which an electrode coil according to the first aspect is arranged.
  • a third aspect of the solution concerns a battery unit with several energy storage cells according to the second aspect.
  • a fourth aspect of the solution relates to a system with an electric drive and a battery unit according to the third aspect.
  • the system can comprise a motor vehicle, a mobile device or also a stationary device, such as a charging storage unit in a building.
  • a fifth aspect of the solution relates to a method for producing an electrode coil for an energy storage cell, with the following steps: (i) producing a first electrode comprising the step of coating opposite sides of a first current conductor with a first active material in which ions can be stored, wherein the first current conductor has a first electrically conductive material that is impermeable to ions during operation of the energy storage cell and wherein the first current conductor has a first region that is permeable to ions so that the ions can pass from one to the other of the two opposite sides of the first current conductor; (ii) producing a second electrode comprising the step of coating opposite sides of a second current conductor with a second active material in which the ions can be stored, wherein the second current conductor (165) has a second electrically conductive material that is impermeable to ions during operation of the energy storage cell (100); (iii) arranging a separator, the first electrode and the second electrode in a sequence separator, first electrode, separator, second electrode; (
  • the first current collector is separated from a current collector roll provided for a plurality of current collectors for a plurality of electrode coils in a manufacturing step prior to coating, the current collector roll having a first region permeable to the ions at equal intervals.
  • Fig. 1 schematically shows a battery cell according to an embodiment
  • Figs. 2A to 2B each show schematically a section of a coated first electrode of an embodiment
  • Figs. 2C to 2D each schematically show a section of a coated second electrode of an embodiment
  • Fig. 3 is a flow chart illustrating a preferred embodiment of a method.
  • FIG. 1 shows a schematic of a battery cell 100 according to an embodiment.
  • the battery cell 100 has an electrically conductive cell housing 110.
  • An electrode coil 120 is arranged in the cell housing 110.
  • the electrode coil 120 has an electrode with a first, positive, polarity 140 and an electrode with a second, negative, polarity 160.
  • the electrode coil 120 and the battery cell 100 could also be constructed such that the first polarity is negative and the second polarity is positive.
  • the electrode coil 120 is arranged in the cell housing 110 such that electrodes with positive polarity 140 and negative polarity 160 are arranged alternately in the radial direction to a longitudinal axis L of the cell housing 110 or the electrode coil 120.
  • a separator 130 is arranged between the positively polarized electrode 140 and the negatively polarized electrode 160, which has an electrically insulating material so that the differently polarized electrodes 140, 160 are electrically insulated from one another.
  • the positively polarized electrode 140 has a first current conductor 145, which is coated on both sides with a first electrochemical active material 150.
  • the negatively polarized electrode 160 has a second current conductor 165, which is coated on both sides with a second electrochemical active material 170.
  • the first current conductor 145 and the second current conductor 165 can each be designed as a foil. In this context, a current conductor designed as a foil is also referred to below as a conductor foil.
  • the electrode winding 120 is arranged within the cell housing 110 such that the negative electrode 160 is electrically connected to the cell housing 110.
  • the electrode coil 120 is arranged within the cell housing 110 in an electrically insulating inner housing (not shown here), which electrically insulates the electrode coil 120 from the cell housing 110.
  • the positively polarized electrode 140 is electrically connected to a first metal plate 180.
  • the negatively polarized electrode 160 is electrically connected to a second metal plate 190.
  • the battery cell 100 schematically has an electrode winding 120 with only two turns.
  • the electrode winding 120 can also have significantly more turns, in particular between 20 and 100 turns.
  • an unfavorable ratio of the electrochemical active material 145 and the ions stored therein between the electrode of positive polarity 140 and the electrode of negative polarity 160 can arise. This is due to the fact that a surface of the first conductor foil 145 that is located radially further outward in relation to the longitudinal axis L has a larger surface than another surface that is located inward, whereby different capacitances can be formed on the respective surfaces.
  • the first conductor foil 145 has, in an innermost turn with respect to the longitudinal axis L, a first region 230 which is perforated and is thus permeable to ions. This allows the ratio of the stored ions between two opposite sides of the first conductor foil 145 to be adjusted. Embodiments of sections of the first conductor foil 145 and the first region 230 are described in more detail below in Figures 2A to 2B.
  • the second conductor foil 165 has, in an innermost turn with respect to the longitudinal axis L, a second region 260 which is perforated and is thus permeable to ions. This allows the ratio of the stored ions between two opposite sides of the second conductor foil 165 to be adjusted. Embodiments of sections of the second conductor foil 165 and the second region 260 are described in more detail below in Figures 2C to 2D.
  • Figures 2A to 2B show embodiments of a section of a first electrode 140 with positive polarity.
  • FIG 2A shows a schematic section 200 of a first electrode with positive polarity 140 of the electrode coil 120 from Figure 1 of a first embodiment.
  • the first electrode 140 has a first conductor foil 145 made of an electrically conductive material, in particular aluminum.
  • the first conductor foil 145 is coated on both sides with a first electrochemical active material 150, in which ions, in particular lithium ions, can be stored during operation of the battery cell.
  • a first edge region 235 protruding towards the coated regions is formed at an end region of the first conductor foil 145.
  • An electrical connection can be made at this first edge region 235, in particular by welding, to a first metal plate 180, via which an electrical contact can be made through a cell housing wall with an electrical consumer.
  • the first edge region 235 has no perforation and is impermeable to ions.
  • the first conductor foil 145 has a first region 230 that is permeable to the ions.
  • the first region 230 has a hole structure or a perforation that is designed such that ions can pass from one side of the first conductor foil 145 through the hole structure to the other side of the first conductor foil 145. This allows the ratio of the stored ions between two opposite sides of the first conductor foil 145 to be adjusted in the installed state.
  • Figure 2B shows a schematic section 210 of a coated first electrode with positive polarity 140 of a second embodiment.
  • the conductor foil 145 has a first region 230 with a hole structure.
  • the perforated first region 230 extends beyond the coated region, so that the first edge region 235 of the first conductor foil 145 is also perforated. This allows the electrical connection of the first metal plate 180 to a perforated edge region 235.
  • Figures 2C to 2D show embodiments of a section of a second electrode 160 with negative polarity.
  • FIG 2C shows a schematic section 240 of a second electrode with negative polarity 160 of the electrode coil 120 from Figure 1 of a first embodiment.
  • the second electrode 160 has a second conductor foil 165 made of an electrically conductive material, in particular copper.
  • the second conductor foil 165 is coated on both sides with a second electrochemical active material 170, in which ions, in particular lithium ions, can be stored during operation of the battery cell.
  • a second edge region 265 protruding towards the coated regions is formed at an end region of the second conductor foil 165.
  • An electrical connection can be made at this second edge region 265, in particular by welding, to a second metal plate 190, via which an electrical contact can be made through a cell housing wall with an electrical consumer.
  • the second edge region 265 has no perforation and is impermeable to ions.
  • the second conductor foil 165 has a second region 260 that is permeable to the ions.
  • the second region 260 has a hole structure or a perforation that is designed such that ions can pass from one side of the second conductor foil 165 through the hole structure to the other side of the second conductor foil 165. This allows the ratio of the stored ions between two opposite sides of the second conductor foil 165 to be adjusted in the installed state.
  • Figure 2D shows a schematic section 250 of a coated second electrode with negative polarity 160 of a second embodiment.
  • the second conductor foil 165 has, as in Figure 2C, a second region 260 with a hole structure.
  • the perforated second region 260 extends over the coated area, so that the second edge area 265 of the second conductor foil 165 is also perforated. This allows the electrical connection of the second metal plate 190 to a perforated edge area 265.
  • the first region 230 and/or second region 260 permeable to ions can be formed on one or more radially inner or innermost turns of the corresponding first conductor foil 145 or the second conductor foil with respect to the longitudinal axis L.
  • the first region 230 and/or second region 260 can be formed on turns that are arranged radially further away from the longitudinal axis L.
  • a perforated foil or expanded metal can be used as a conductor foil to reduce mechanical stresses in a winding core that arise as a result of the expansion/contraction of the active material during charge/discharge cycles.
  • Figure 3 shows a flow chart to illustrate a preferred embodiment of a method for producing an electrode coil 120.
  • a first electrode 140 is manufactured, comprising the step of coating opposite sides of a first current conductor 145 with a first active material 150 in which ions can be stored, wherein the first current conductor 145 has a first electrically conductive material that is impermeable to ions during operation of the energy storage cell 100 and wherein the first current conductor has a first region 230 that is permeable to ions so that the ions can pass from one to the other of the two opposite sides of the first current conductor 145.
  • a second electrode 165 is manufactured, comprising the step of coating opposite sides of a second current conductor 165 with a second active material 170 into which the ions can be stored, wherein the second current conductor 165 has a second electrically conductive material that is impermeable to ions during operation of the energy storage cell 100.
  • a separator 130, the first electrode 140 and the second electrode 160 are arranged in a sequence separator 130, first electrode 140, separator 130, second electrode 160.
  • this arrangement is wound around a longitudinal axis L.
  • the distance between the perforated areas is selected so that the roll can be cut to fit several planned electrode windings 120.
  • the length of the perforated area in the rolling direction is based on how many turns are to be in the area of the perforated foil.

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

Abstract

L'invention concerne un enroulement d'électrode conçu pour une cellule de stockage d'énergie, comprenant : (i) une première électrode comprenant un premier conducteur de courant qui comprend un premier matériau électroconducteur qui est imperméable aux ions pendant le fonctionnement de la cellule de stockage d'énergie ; (ii) le premier conducteur de courant comprenant deux côtés opposés qui sont respectivement revêtus d'un premier matériau actif dans lequel des ions, en particulier des ions lithium, peuvent être stockés ; (iii) une deuxième électrode comprenant un deuxième conducteur de courant qui comprend un deuxième matériau électroconducteur qui est imperméable aux ions pendant le fonctionnement de la cellule de stockage d'énergie ; (iv) le deuxième conducteur de courant comprenant deux côtés opposés qui sont respectivement revêtus d'un deuxième matériau actif dans lequel les ions peuvent être stockés ; (v) un séparateur disposé entre la première électrode et la deuxième électrode, isolant ainsi électriquement la première électrode et la deuxième électrode l'une de l'autre ; (vi) le premier conducteur de courant comportant une première zone qui est rendue perméable aux ions, de sorte que les ions puissent passer de l'un à l'autre des deux côtés opposés du premier conducteur de courant.
PCT/EP2023/079863 2022-11-08 2023-10-26 Enroulement d'électrode pour une cellule de stockage d'énergie, cellule de stockage d'énergie et procédé de production WO2024099782A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102022129522.2A DE102022129522A1 (de) 2022-11-08 2022-11-08 Elektrodenwickel für eine Energiespeicherzelle, Energiespeicherzelle und Verfahren zur Herstellung
DE102022129522.2 2022-11-08

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WO2024099782A1 true WO2024099782A1 (fr) 2024-05-16

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0917221A1 (fr) * 1997-11-18 1999-05-19 SANYO ELECTRIC Co., Ltd. Accumulateur alcalin cylindrique et sa méthode de fabrication
JP2010238680A (ja) * 2009-03-13 2010-10-21 Jm Energy Corp 蓄電デバイス用電極およびその製造方法並びにリチウムイオンキャパシタ
EP1742279B1 (fr) * 2005-07-08 2012-06-27 Greatbatch Ltd. Pile électrochimique comprenant un séparateur en forme de poche
WO2021255238A1 (fr) * 2020-06-19 2021-12-23 Varta Microbattery Gmbh Pile lithium-ion à haute densité d'énergie spécifique

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6037662A (ja) 1983-08-09 1985-02-27 Sanyo Electric Co Ltd 亜鉛極
DE112011100008T5 (de) 2010-04-06 2012-06-28 Nec Tokin Corp. Elektrische Speichervorrichtung
US9356294B2 (en) 2012-03-02 2016-05-31 Samsung Sdi Co., Ltd. Secondary battery including collectors with pores and manufacturing method thereof
US10593988B2 (en) 2013-06-20 2020-03-17 GM Global Technology Operations LLC Electrochemical cell for lithium-based batteries

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0917221A1 (fr) * 1997-11-18 1999-05-19 SANYO ELECTRIC Co., Ltd. Accumulateur alcalin cylindrique et sa méthode de fabrication
EP1742279B1 (fr) * 2005-07-08 2012-06-27 Greatbatch Ltd. Pile électrochimique comprenant un séparateur en forme de poche
JP2010238680A (ja) * 2009-03-13 2010-10-21 Jm Energy Corp 蓄電デバイス用電極およびその製造方法並びにリチウムイオンキャパシタ
WO2021255238A1 (fr) * 2020-06-19 2021-12-23 Varta Microbattery Gmbh Pile lithium-ion à haute densité d'énergie spécifique

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