WO2023208906A1 - Plaque collectrice de courant et cellule secondaire cylindrique pourvue d'une telle plaque collectrice de courant - Google Patents

Plaque collectrice de courant et cellule secondaire cylindrique pourvue d'une telle plaque collectrice de courant Download PDF

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Publication number
WO2023208906A1
WO2023208906A1 PCT/EP2023/060769 EP2023060769W WO2023208906A1 WO 2023208906 A1 WO2023208906 A1 WO 2023208906A1 EP 2023060769 W EP2023060769 W EP 2023060769W WO 2023208906 A1 WO2023208906 A1 WO 2023208906A1
Authority
WO
WIPO (PCT)
Prior art keywords
current collecting
collecting plate
electrolyte flow
flow holes
conductive sheet
Prior art date
Application number
PCT/EP2023/060769
Other languages
English (en)
Inventor
Tetsuya Makino
Kenya Shatani
Original Assignee
Northvolt Ab
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 Northvolt Ab filed Critical Northvolt Ab
Publication of WO2023208906A1 publication Critical patent/WO2023208906A1/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
    • H01M10/0422—Cells or battery with cylindrical 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
    • H01M10/04—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
    • 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
    • H01M10/05—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
    • 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
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
    • H01M50/176—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for prismatic 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
    • H01M50/545—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
    • 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
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • 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
    • H01M50/559—Terminals adapted for cells having curved cross-section, e.g. round, elliptic or button cells

Definitions

  • the present disclosure generally pertains to cylindrical secondary cells and components thereof.
  • the disclosure relates to a current collecting plate and to a cylindrical secondary cell comprising such a current collecting plate.
  • lithium-ion batteries are becoming increasingly popular. They represent a type of rechargeable battery in which lithium ions move from the negative electrode to the positive electrode during discharge and back when charging.
  • a rechargeable battery typically comprises one or more secondary cells electrically connected to each other.
  • the present disclosure aims at providing highly reliable secondary cells that are efficient in manufacture.
  • the number of components is to be reduced and the assembly thereof is to be simplified.
  • a current collecting plate for a cylindrical secondary cell comprises an external terminal and an electrode roll comprising a conductive sheet.
  • the current collecting plate is configured to be arranged in direct electrical contact with the conductive sheet and comprises electrolyte flow holes for allowing an electrolyte to flow through the current collecting plate.
  • the electrolyte flow holes being elongate with their respective axis of elongation oriented essentially towards the center of the current collecting plate.
  • the above electrolyte flow holes may allow a relatively large through-flow area through the current collecting plate, while there is a remaining area for other functions of the current collecting plate.
  • a relatively large through-flow area may be beneficial for the flow of, typically liquid, electrolyte during manufacture.
  • a relatively large through-flow area may in addition be beneficial for through-flow of electrolyte in the event of failure of the cylindrical secondary cell.
  • the remaining area may for example be used for attaching the current collecting plate to the conductive sheet, e.g. by welding such as laser welding.
  • the current collecting plate may be configured to be arranged in direct electrical contact with the external terminal, such that the external terminal and the conductive sheet are efficiently and reliably contacted to one another.
  • direct electrical contact means direct electrical and physical contact.
  • the current collecting plate may be one single component electrically coupled between the conductive sheet and the external terminal. In other words, the current collecting plate may be the only component electrically coupled between the conductive sheet and the external terminal. Thereby, the number of components of the cylindrical secondary cell is kept low, and its manufacture involves few steps.
  • the current collecting plate may have the general shape of a circular disc.
  • the current collecting plate may comprise an outer, e.g. annular, contact region that is adapted to be arranged in direct electrical contact with the conductive sheet.
  • the current collecting plate may comprise an inner, e.g. circular, contact region that is adapted to be arranged in direct electrical contact with the external terminal.
  • the external terminal may be formed by a rivet.
  • the current collecting plate may comprise an outer, e.g. annular, contact region that is adapted to be arranged in direct electrical contact with the external terminal.
  • the external terminal may be formed by a cylindrical enclosure, or can, of the cylindrical secondary cell.
  • the outer contact region may be formed by an outer edge of the current collecting plate.
  • the edge may comprise a flange that forms the outer edge.
  • the outer contact region may be adapted to be arranged in direct electrical contact with a longitudinal side wall of the cylindrical enclosure.
  • the current collecting plate may comprise an inner, e.g. annular, contact region that is adapted to be arranged in direct electrical contact with the conductive sheet.
  • the inner and outer contact regions may be radially separated. There may be no overlap of the inner and outer contact regions.
  • a cylindrical secondary cell comprises a cylindrical enclosure comprising a first enclosure end and a second enclosure end, an electrode roll comprising first and second conductive sheets comprising electrode coatings, the electrode roll being arranged in the cylindrical enclosure.
  • the cylindrical secondary cell further comprises a first external terminal arranged on the first enclosure end and electrically connected to the first conductive sheet, a second external terminal arranged on the first enclosure end and electrically connected to the second conductive sheet via the cylindrical enclosure, and a current collecting plate as described in the present disclosure.
  • the current collecting plate may be arranged in direct electrical contact with the first or the second external terminal.
  • Figure 1 is a plan view of a current collecting plate
  • Figure 2 is a plan view of an alternative current collecting plate
  • Figure 3 is a partly cross-sectional side view of a first end of a cylindrical secondary cell
  • Figure 4 is a partly cross-sectional side view of a second end of a cylindrical secondary cell.
  • Figures 1 and 2 show two examples of current collecting plates 1 according to the present disclosure.
  • the current collecting plates 1 are configured to be used in a cylindrical secondary cell 100 as the one illustrated in figure 3 and 4.
  • Figures 3 and 4 may show the first (here: upper) and second (here: lower) ends of one and the same cylindrical secondary cell 100.
  • the current collecting plates 1 of figures 1 and 2 may be applied in a cylindrical secondary cell 100 that has the upper design shown in figure 3 but another design than the lower design shown in figure 4, and vice versa.
  • the cylindrical secondary cell 100 comprises a cylindrical enclosure 130 comprising a first (here: upper) enclosure end 130a and a second (here: lower) enclosure end 130b, an electrode roll 120 comprising first and second conductive sheets 125, 127 comprising electrode coatings, the electrode roll 120 being arranged in the cylindrical enclosure 130, a first external terminal 110 arranged on the first enclosure end 130a and electrically connected to the first conductive sheet 125, a second external terminal 115 arranged on the first enclosure end 130a and electrically connected to the second conductive sheet 127 via the cylindrical enclosure 130, and a current collecting plate 1.
  • the current collecting plate 1 may comprise a recessed portion.
  • the recessed portion may accommodate the first external terminal 110 here shown as a rivet.
  • the current collecting plate 1 may comprise an outer flange, or bent rim, for improved (e.g. welded) contact to the inner longitudinal side wall 132 of the cylindrical enclosure 130.
  • the flange may increase the contact area.
  • the flange may further facilitate welding the current collecting plate 1 to the longitudinal side wall 132.
  • the current collecting plate 1 is thus configured to be arranged in direct electrical contact (e.g. by welding) with the conductive sheet 125, 127 and may further be configured to be arranged in direct electrical contact with the external terminal 110, 115.
  • the current collecting plate 1 comprises electrolyte flow holes 2 for allowing an electrolyte to flow through the current collecting plate 1, the electrolyte flow holes 2 being elongate with their respective axis of elongation 3 oriented essentially towards the center of the current collecting plate 1.
  • the electrolyte flow holes 2 may be arranged in a pattern on the current collecting plate 1, which pattern allows welding the current collecting plate 1 to the conductive sheet 125, 127 by a plurality of weld lines 50 arranged between the electrolyte flow holes 2, the weld lines 50 being provided to attach the current collecting plate 1 to the conductive sheet 125, 127.
  • the weld lines 50 may be straight.
  • Three adjacent weld lines may be beneficial for electrically contacting and attaching the current collecting plate 1 to the conductive sheet 125, 127, e.g. by welding such as laser welding as disclosed herein.
  • the application of three adjacent weld lines may allow the use of a relatively thin current collecting plate 1.
  • Three adjacent weld lines may provide a rigid connection between the current collecting plate 1 and the conductive sheet 125, 127, and may hinder the current collecting plate 1 from bending and also hinder the layers of conductive sheets 125, 127 of the electrode roll 120 from moving in relation to one another. It is to be apprehended that the herein described application of three adjacent weld lines may be used also in cylindrical secondary cells of other designs than the one shown herein, and together with other current collecting plates.
  • the pattern allows arranging the weld lines 50 essentially towards the center of the current collecting plate 1. As is shown in figures 1 and 2, the weld lines 50 extent from the outer perimeter of the current collecting plate 1 towards its center.
  • the current collecting plate 1 may comprise a center electrolyte flow hole 4 and electrolyte flow holes 2 uniformly distributed around the center electrolyte flow hole 4, see figures 1 and 2.
  • Figure 1 discloses a possible real implementation of the electrolyte flow holes 2.
  • the numbers and relative sizes of the electrolyte flow holes 2 of figure 1 may correspond to a realized product.
  • the number of electrolyte flow holes 2 may be six.
  • each electrolyte flow hole 2 may be approximately 3 percent of the of the area of the current collecting plate 1, a suitable range being is 2 to 6 percent. It is believed that if three electrolyte flow holes 2 are implemented (figure 3), the area of each one of the electrolyte flow holes 2 may be larger than what is illustrated herein.
  • the total area of the electrolyte flow holes may be approximately 18 percent of the area of the current collecting plate 1, a suitable range being 6 to 22 percent, or 15 to 20 percent.
  • the current collecting plate 1 may comprise at least three electrolyte flow holes 2, such as exactly three electrolyte flow holes 2 as is shown in figure 2.
  • the number of electrolyte flow holes 2 may be three.
  • the current collecting plate 1 may comprise at least six electrolyte flow holes 2, such as exactly six electrolyte flow holes 2 as is shown in figure 1.
  • the current collecting plate 1 of figure 1 comprises six electrolyte flow holes 2, wherein the area of the electrolyte flow holes is 15 to 22 percent of the area of the current collecting plate 1.
  • the number of electrolyte flow holes 2 may be six and the area of the electrolyte flow holes may be 15 to 22 percent of the area of the current collecting plate 1.
  • the current collecting plate 1 may comprise a center electrolyte flow hole 4.
  • the area of the center electrolyte flow hole 4 may be approximately 3 percent of the area of the current collecting plate 1, a suitable range being 2 to 5 percent.
  • the number of electrolyte flow holes 2 may be six and there may be in addition be one center electrolyte flow hole 4.
  • the current collecting plate 1 comprises six electrolyte flow holes 2 and a center electrolyte flow hole 4.
  • the area of the electrolyte flow holes 2, 4 amounts to approximately 22 percent of the area of the current collecting plate 1, a suitable range being is 17 to 28 percent.
  • each electrolyte flow hole 2 may have the general shape of a triangle or a trapezoid. Such shapes may be beneficial for providing a large through-flow area while there is a remaining area available for e.g. welding as is apprehended from figure 1 or 2.
  • Each electrolyte flow hole 2 is of an oblong shape.
  • the electrolyte flow holes 2 be of a shape that is not uniform along their axis of elongation 3.
  • the width of the electrolyte flow holes 2 varies along the along the extension of the electrolyte flow holes 2.
  • the radially outer end 2b of the electrolyte flow holes 2 may have a greater with than the radially inner end 2a of the electrolyte flow holes 2, as is illustrated.
  • the inner and outer ends 2a, 2b are denoted in figure 2.
  • Such shapes may be beneficial for providing a large through-flow area while there is a remaining area available for e.g. welding. Such shapes may optimise the use of a circular current collecting plate 1.
  • the electrolyte flow holes 2 illustrated in figures 1 and 2 may be said to be generally trapezoidal with rounded corners, or generally triangular with rounded corners. In both cases, the electrolyte flow holes 2 are elongate with their respective axis of elongation 3 oriented essentially towards the center of the current collecting plate and the radially outer end 2b of the electrolyte flow holes 2 having a greater with than the radially inner end 2a of the electrolyte flow holes 2. Rounded comer may be beneficial for reducing mechanical and electrical stress concentrations.
  • each electrolyte flow hole 2 may comprise, i.e. be defined by, two long sides that extend essentially in the radial direction. These long sides may form an angle a (denoted in figure 2). In the present examples, the angle a equals approximately 15 degrees. Suitable ranges for the angle a are 12 to 20 degrees, or 10 to 30 degrees.
  • the two long sides of the electrolyte flow holes 2 need not be oriented such that their extensions intersect at the center of the current collecting plate 1.
  • the two long sides of the electrolyte flow holes 2 are oriented such that their extensions intersect at the distal side of said center, as seen from the respective electrolyte flow hole 2.
  • the length to width of the electrolyte flow holes 2 is approximately 2.5.
  • the width being measured as a mean width. Suitable ranges are 1.5 to 4, or 2 to 3.
  • the current collecting plate 1 may comprise an annular roll contact region 5r that is adapted to be arranged in direct electrical contact with the conductive sheet 125, 127 of the electrode roll 120.
  • the annular roll contact region 5r is illustrated by the checkered pattern in figure 2.
  • the current collecting plate 1 may further comprise an inner terminal contact region 5t’ that is adapted to be arranged in direct electrical contact with the external terminal 110 (see in particular figure 3).
  • the annular roll contact region 5r is radially separated from the inner terminal contact region 5f .
  • the current collecting plate 1 may comprise an annular terminal contact region 5t that is adapted to be arranged in direct electrical contact with the external terminal 115 (see in particular figure 4).
  • the annular roll contact region 5r is radially separated from the annular terminal contact region 5t.
  • the cylindrical secondary cell 100 may comprise two current collecting plates 1, one for each one of the conductive sheets 125, 127 of the electrode roll 120.
  • the portion of the current collecting plate 1 in which the elongate electrolyte flow holes 2 is made is flat.
  • the entire current collecting plate 1 may be flat.
  • the electrolyte flow holes 2 being elongate means that the length of the holes exceeds the width of the holes, as seen in a plan view (figure 1 or 2). In other words, the holes are not circular or square.
  • Figures 3 and 4 disclose a number of exemplary features that are not of particular importance to the present disclosure that relates to the current collecting plate 1.
  • the first enclosure end 130a may be formed in one piece with the cylindrical enclosure 130 (as illustrated in figure 3) and the second enclosure end 130b may be formed by a separate second enclosure end lid.
  • the present cylindrical secondary cell 100 is of a type that has both a positive terminal 110 and a negative terminal 115 at one and the same end (the top end in figure 3) of the cylindrical secondary cell.
  • the first enclosure end 130a comprises a central terminal through-hole for the positive terminal 110 (in this case in the form of a rivet).
  • the negative terminal 115 is electrically connected to the cylindrical enclosure 130. More precisely, the negative terminal 115 is formed by the top surface of the cylindrical enclosure that surrounds the terminal through-hole. Thus, the entire cylindrical enclosure (apart from the positive terminal at the top end) may be the negative terminal 115.
  • a cylindrical secondary cell having both terminals 110, 115 at one end may bring advantages as regards electrically connecting the cell to a load.
  • Conductors electrically connecting the terminals to the load may be positioned on the same end, the terminal end, of the cell.
  • the opposite end, the electrolyte-filling end, of the cell may be dedicated to electrolyte filling and gas venting.
  • the electrolyte filling end is not described in detail.
  • An overpressure may be generated within the cell during operation, in particular upon malfunction of the cell or of the load connected to the cell. Such malfunction may require a release of gas and/or electrolyte out of the cell, and it may be advantageous to direct the released gas and/or electrolyte away from the conductors.
  • a number of cells may be positioned at a low position in an electric vehicle.
  • the cells may be arranged with the terminal ends directed upwards and the electrolyte-filling ends directed downwards.
  • a release of gas and/or electrolyte from the electrolyte-filling end(s) will be advantageously directed downwards towards the ground beneath the vehicle.
  • the electrode roll 120 comprises a first and a second conductive sheet 125, 127 and separating means (not shown).
  • the separating means may also be termed separator.
  • the conductive sheets and the separating means are rolled to form a circular cylindrical roll defining a central channel (shown in figures 3 and 4).
  • the sheets are coated with electrode coatings and on assembly of the cell the cylindrical enclosure is filled with an electrolyte.
  • the electrolyte may flow through the central channel.
  • the coatings on the conductive sheets act as cathode and anode, respectively.
  • the cathode, anode and electrolyte provide electrochemical energy storage. This principle is known per se, and the electrode roll is commonly referred to as a jellyroll.
  • the sheets of the electrode roll are axially offset in relation to one another, and each comprises an end section that is not coated with electrode coating.
  • figure 3 only the first end of the electrode roll is shown, and at this end the first conductive sheet 125 protrudes axially from the electrode roll.
  • figure 4 of the electrode roll 3 the second conductive sheet 127 protrudes axially.
  • the upper end of the first conductive sheet 125 is not coated with electrode coating.
  • the lower end of the second conductive sheet 127 is not coated with electrode coating.
  • the respective ends of the electrode roll may be efficiently electrically connected to a respective assigned terminal 110, 115 of the cylindrical secondary 100.
  • This design is known per se and commonly referred to as a tabless cell.
  • the cylindrical secondary cell 100 comprises the current collecting plate 1 that is arranged at the upper end of the electrode roll 120 (and, similarly, optionally, at the lower end of the electrode roll 120).
  • the current collecting plate 1 may be in direct electrical contact with the first conductive sheet, more precisely with the non-coated end section of the first conductive sheet.
  • the current collecting plate 1 may be attached, for example welded, for example laser welded, to the first conductive sheet.
  • the cylindrical secondary cell 100 further comprises an external terminal 110.
  • the terminal is rotational symmetric around its longitudinal center axis (not illustrated).
  • the terminal 110 extends through the first enclosure end 130a and has an outer, or first, end (e.g. factory head of rivet) and an inner, or second, end (e.g. shop head of rivet).
  • the terminal 110 may be in direct electrical contact with the current collecting plate 1.
  • the inner end (e.g. shop head) of the terminal may be in direct electrical contact (e.g. welded) with the current collecting plate.
  • the terminal 110 has the shape of a rivet with a head portion, or so-called factory rivet head, and a shaft portion, or rivet shaft.
  • the electrically isolating means surrounds the rivet shaft.
  • the electrically isolating means may be referred to as a rivet gasket.
  • the rivet shaft extends through the through-hole in the first enclosure end 130a and is electrically isolated from the through-hole by the electrically isolating means.
  • the rivet 110 is riveted, thus plastically deformed, such that a portion of the rivet shaft is expanded radially, see figure 3.
  • the rivet shaft is thus deformed to form a so-called shop rivet head.
  • the shop rivet head hinders the rivet 110 (that may be referred to as a terminal rivet) from being pulled out of the through- hole in the first enclosure end 130a.
  • a recessed current collecting plate 1 facilities the use of a rivet as a terminal 110.
  • the shop head will occupy some space within the cell 100, which space may be provided by the recessed current collecting plate.
  • the rivet shop head and the inner contact region may be positioned within the central channel of the electrode roll 120.
  • the current collecting plate 1 may have inner and outer contact regions that are positioned in the same plane.
  • the current collecting plate 1 may have the form of a circular and flat disc.
  • the area of the current collecting plate 1 where welding may be performed to attach the current collecting plate 1 to the conductive sheet 125, 127 of the electrode roll 120 may be flat.

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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)
  • Connection Of Batteries Or Terminals (AREA)
  • Secondary Cells (AREA)

Abstract

La présente divulgation présente une plaque collectrice de courant (1) pour une cellule secondaire cylindrique (100) comprenant une borne externe (110, 115) et un rouleau d'électrode (120) comprenant une feuille conductrice (125, 127), la plaque collectrice de courant (1) étant configurée pour être agencée en contact électrique direct avec la feuille conductrice (125, 127) et comprenant des trous d'écoulement d'électrolyte (2) pour permettre à un électrolyte de s'écouler à travers la plaque collectrice de courant (1), les trous d'écoulement d'électrolyte (2) étant allongés avec leur axe d'allongement respectif (3) orienté essentiellement vers le centre de la plaque collectrice de courant (1). La divulgation présente en outre une cellule secondaire cylindrique (100) comprenant une telle plaque collectrice de courant (1).
PCT/EP2023/060769 2022-04-26 2023-04-25 Plaque collectrice de courant et cellule secondaire cylindrique pourvue d'une telle plaque collectrice de courant WO2023208906A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE2250503A SE2250503A1 (en) 2022-04-26 2022-04-26 A current collecting plate and a cylindrical secondary cell
SE2250503-6 2022-04-26

Publications (1)

Publication Number Publication Date
WO2023208906A1 true WO2023208906A1 (fr) 2023-11-02

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Application Number Title Priority Date Filing Date
PCT/EP2023/060769 WO2023208906A1 (fr) 2022-04-26 2023-04-25 Plaque collectrice de courant et cellule secondaire cylindrique pourvue d'une telle plaque collectrice de courant

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SE (1) SE2250503A1 (fr)
WO (1) WO2023208906A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070298317A1 (en) * 2006-05-09 2007-12-27 Ralph Brodd Secondary electrochemical cell with increased current collecting efficiency
EP2061106A1 (fr) * 2007-11-13 2009-05-20 Hitachi Vehicle Energy, Ltd. Accumulateur à lithium
US8338024B2 (en) * 2006-09-05 2012-12-25 Saft Electrical connection device for an output terminal of a storage battery

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002298906A (ja) * 2001-03-29 2002-10-11 Toshiba Battery Co Ltd ニッケル水素二次電池
KR100589347B1 (ko) * 2004-04-27 2006-06-14 삼성에스디아이 주식회사 이차 전지
KR100684740B1 (ko) * 2006-10-30 2007-02-22 삼성에스디아이 주식회사 이차 전지
JP6228127B2 (ja) * 2012-10-30 2017-11-08 三洋電機株式会社 円筒形蓄電池及び蓄電池モジュール

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070298317A1 (en) * 2006-05-09 2007-12-27 Ralph Brodd Secondary electrochemical cell with increased current collecting efficiency
US8338024B2 (en) * 2006-09-05 2012-12-25 Saft Electrical connection device for an output terminal of a storage battery
EP2061106A1 (fr) * 2007-11-13 2009-05-20 Hitachi Vehicle Energy, Ltd. Accumulateur à lithium

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SE2250503A1 (en) 2023-09-18

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