WO2023048950A1 - Éléments de batterie dotés de languettes au niveau d'angles droits - Google Patents

Éléments de batterie dotés de languettes au niveau d'angles droits Download PDF

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Publication number
WO2023048950A1
WO2023048950A1 PCT/US2022/042874 US2022042874W WO2023048950A1 WO 2023048950 A1 WO2023048950 A1 WO 2023048950A1 US 2022042874 W US2022042874 W US 2022042874W WO 2023048950 A1 WO2023048950 A1 WO 2023048950A1
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WO
WIPO (PCT)
Prior art keywords
current collector
housing
cathode
anode
battery
Prior art date
Application number
PCT/US2022/042874
Other languages
English (en)
Inventor
Christopher T. Campbell
Nivay Anandarajah
William A. Braff
Oskar DONDELEWSKI
Russell A. Mclellan
Original Assignee
Apple Inc.
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
Priority claimed from US17/448,808 external-priority patent/US11942661B2/en
Priority claimed from US17/448,793 external-priority patent/US11870100B2/en
Priority claimed from US17/448,799 external-priority patent/US11929522B2/en
Application filed by Apple Inc. filed Critical Apple Inc.
Priority to CN202280062588.6A priority Critical patent/CN117999678A/zh
Publication of WO2023048950A1 publication Critical patent/WO2023048950A1/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
    • H01M50/543—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
    • H01M10/052—Li-accumulators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • 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
    • 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
    • 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
    • H01M50/183—Sealing members
    • H01M50/186—Sealing members characterised by the disposition of the sealing members
    • H01M50/188—Sealing members characterised by the disposition of the sealing members the sealing members being arranged between the lid and terminal
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/463—Separators, membranes or diaphragms characterised by their shape
    • H01M50/466—U-shaped, bag-shaped or folded
    • 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
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/54—Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges
    • 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
    • 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
    • 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
    • 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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/202—Casings or frames around the primary casing of a single cell or a single battery
    • 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

  • the present technology relates to batteries . More specifically, the present technology relates to batteries where the current collector tabs may be formed at right angles to one another.
  • Batteries are used in many devices. As devices in which batteries are housed reduce in size and require increased energy density, the available space for battery cells and associated system materials may challenge battery operation.
  • Batteries according to embodiments of the present technology may include a housing including a first terminal disposed on a first side of the housing and a second terminal disposed on the first side of the housing.
  • the batteries may include an electrode stack positioned within the housing.
  • the electrode stack may include an anode current collector.
  • the anode current collector may define an anode tab along a first side of the anode current collector.
  • the anode tab may extend towards the first side of the housing.
  • the anode tab may be electrically coupled with the first terminal.
  • the electrode stack may include a cathode current collector.
  • the cathode current collector may be characterized by a first side facing the first side of the housing.
  • the cathode current collector may define a cathode tab along a second side of the cathode current collector.
  • the cathode tab may extend from the cathode current collector in a direction normal to a direction the anode tab extends from the anode current collector.
  • the cathode tab may be electrically coupled with the second terminal.
  • the cathode current collector may define a plurality of cathode tabs extending from the second side of the cathode current collector.
  • the plurality of cathode tabs may be distributed along the second side of the cathode current collector with a non-uniform spacing between each cathode tab of the plurality of cathode tabs.
  • the batteries may include a busbar coupled with each cathode tab of the plurality of cathode tabs.
  • the busbar may be electrically coupled with the housing.
  • the busbar may be coupled with a cap disposed on a second side of the housing opposite the first side of the housing.
  • the first terminal may be electrically isolated from the housing.
  • the housing and second terminal may be maintained at cathode potential.
  • the anode current collector may include a plurality of anode current collectors. Each anode current collector of the plurality of anode current collectors may define an anode tab extending from a first side of the anode current collector. Each anode tab from the plurality of anode current collectors may be coupled together.
  • the cathode current collector may include a plurality of cathode current collectors. Each cathode current collector of the plurality of cathode current collectors may define a cathode tab extending from a second side of the cathode current collector. Each cathode tab from the plurality of cathode current collectors may be coupled together.
  • the batteries may include a separator.
  • the separator may be a continuous separator folded between each current collector of the plurality of anode current collectors and the plurality of cathode current collectors.
  • the separator may wrap about a second side adjacent a first side of each anode current collector.
  • the separator may wrap about a third side opposite a second side of each cathode current collector.
  • the anode current collector may be or include copper
  • the cathode current collector may be or include aluminum.
  • the housing may be or include aluminum.
  • Some embodiments of the present technology may encompass batteries.
  • the batteries may include a housing including a first terminal disposed on a first side of the housing and a second terminal disposed on the first side of the housing.
  • the housing may be characterized by a second side opposite the first side and a third side extending between the first side and the second side.
  • the batteries may include an electrode stack positioned within the housing.
  • the electrode stack may include a first current collector characterized by a first side facing the first side of the housing, a second side opposite the first side, a third side extending between the first side and the second side, and a fourth side opposite the third side.
  • the first current collector may define a first current collector tab along the first side of the first current collector.
  • the first current collector tab may extend towards the first side of the housing.
  • the first current collector tab may be electrically coupled with the first terminal.
  • the electrode stack may include a second current collector characterized by a first side facing the first side of the housing, a second side opposite the first side, a third side extending between the first side and the second side, and a fourth side opposite the third side.
  • the second current collector may define a second current collector tab along the third side of the second current collector.
  • the second current collector tab may be electrically coupled with the second terminal.
  • the first current collector may include an anode current collector.
  • the second current collector may include a cathode current collector.
  • the second current collector may define a plurality of second current collector tabs extending from the second side of the second current collector.
  • the batteries may include a busbar coupled with each second current collector tab of the plurality of second current collector tabs.
  • the busbar may be electrically coupled with the housing.
  • the busbar may be electrically coupled with the housing at the second side of the housing.
  • the batteries may include a separator, wherein the separator is a continuous separator extending between the first current collector and the second current collector. The separator may be folded over the second side of the first current collector and folded over the fourth side of the second current collector.
  • the first terminal may be electrically isolated from the housing.
  • the housing and second terminal may be maintained at an electrical potential of the second current collector.
  • Some embodiments of the present technology may encompass batteries.
  • the batteries may include a housing including a first terminal disposed on a first side of the housing and a second terminal disposed on the first side of the housing. The first terminal may be electrically isolated from the housing.
  • the batteries may include an electrode stack positioned within the housing.
  • the electrode stack may include an anode current collector characterized by a first side facing the first side of the housing, a second side opposite the first side, and a third side extending between the first side and the second side.
  • the anode current collector may define an anode tab along the first side of the anode current collector.
  • the anode tab may be electrically coupled with the first terminal.
  • the electrode stack may include a cathode current collector characterized by a first side facing the first side of the housing, a second side opposite the first side, and a third side extending between the first side and the second side.
  • the cathode current collector may define a cathode tab along the third side of the cathode current collector.
  • the cathode tab may be electrically coupled with the housing.
  • the present batteries may afford limited increases in resistance while providing increased battery energy density.
  • the battery components may be coupled together to accommodate a range of configurations and sizes, while controlling mass and volume increases of the battery.
  • FIG.2 shows a schematic view of a battery according to some embodiments of the present technology.
  • FIGS.3A-3B show schematic views of batteries encompassed by some embodiments of the present technology.
  • FIG.4 shows a schematic view of a battery according to some embodiments of the present technology.
  • FIG.5 shows a schematic view of battery components according to some embodiments of the present technology.
  • the battery cells may be designed with a balance of characteristics in mind. For example, including larger batteries may provide increased usage between charges, however, the larger batteries may require larger housing, or increased space within the device. As device designs and configurations change, especially in efforts to reduce device sizes, the available space for additional battery system components may be constrained. These constraints may include restrictions in available volume as well as the geometry of such a volume. Additionally, for devices requiring increased energy availability between charging or replacement, batteries may be increasing in one or more dimensions, which may cause resistance increases across components. [0020] For example, batteries for large devices may be characterized by an extended length or depth, which may extend for a meter or more in length. Additionally, the number of battery cells within the housing of the battery may be increased, which may cause space constraints.
  • the housing may still include terminals at the same end of the battery.
  • Many battery configurations include tabs extending from each current collector, which may be joined together, and then connected with the battery terminals, where the joined anode tabs may be connected with an anode terminal, and the joined cathode tabs may be connected with the cathode terminal.
  • the headspace may not be sufficient to accommodate all the tabs and connections at the same end.
  • Conventional technologies have been unable to overcome these issues. [0021] The present technology may overcome these challenges by adjusting the tab locations on one of the current collectors or current collector sets.
  • While one set of collectors may include tabs extending from a surface in a first direction, the other set of collectors may include tabs extending from a surface substantially perpendicular to the first direction. This may not only address issues with space constraints, but may also provide improvements in resistance across the cell components, which can improve the efficiency of the battery. [0022] Although the remaining portions of the description will reference lithium-ion batteries, it will be readily understood by the skilled artisan that the technology is not so limited. The present techniques may be employed with any number of battery or energy storage devices, including other rechargeable and primary battery types, as well as secondary batteries, or electrochemical capacitors.
  • FIG.1 depicts a schematic cross-sectional view of an energy storage device or battery cell 100 according to embodiments of the present technology.
  • Battery cell 100 may be or include a battery cell, and may be one of a number of cells coupled together to form a battery structure.
  • battery cell 100 includes a first current collector 105 and a second current collector 110.
  • the current collectors may include a metal or a non-metal material, such as a polymer or composite that may include a conductive material.
  • the first current collector 105 and second current collector 110 may be different materials in embodiments.
  • the first current collector 105 may be a material selected based on the potential of an anode active material 115, and may be or include copper, stainless steel, or any other suitable metal, as well as a non-metal material including a polymer.
  • the second current collector 110 may be a material selected based on the potential of a cathode active material 120, and may be or include aluminum, stainless steel, or other suitable metals, as well as a non-metal material including a polymer.
  • the materials for the first and second current collectors can be selected based on electrochemical compatibility with the anode and cathode active materials used, and may be any material known to be compatible.
  • the metals or non-metals used in the first and second current collectors may be the same or different.
  • the materials selected for the anode and cathode active materials may be any suitable battery materials operable in rechargeable as well as primary battery designs.
  • the anode active material 115 may be silicon, graphite, carbon, a tin alloy, lithium metal, a lithium-containing material, such as lithium titanium oxide (LTO), or other suitable materials that can form an anode in a battery cell.
  • the cathode active material 120 may be a lithium-containing material.
  • the lithium-containing material may be a lithium metal oxide, such as lithium cobalt oxide, lithium manganese oxide, lithium nickel manganese cobalt oxide, lithium nickel cobalt aluminum oxide, or lithium titanate, while in other embodiments the lithium-containing material can be a lithium iron phosphate, or other suitable materials that can form a cathode in a battery cell.
  • the first and second current collectors as well as the active materials may have any suitable thickness.
  • a separator 125 may be disposed between the electrodes, and may be a polymer film or a material that may allow lithium ions to pass through the structure while not otherwise conducting electricity. Active materials 115 and 120 may additionally include an amount of electrolyte in a completed cell configuration.
  • the electrolyte may be a liquid including one or more salt compounds that have been dissolved in one or more solvents.
  • the salt compounds may include lithium-containing salt compounds in embodiments, and may include one or more lithium salts including, for example, lithium compounds incorporating one or more halogen elements such as fluorine or chlorine, as well as other non-metal elements such as phosphorus, and semimetal elements including boron, for example.
  • the salts may include any lithium-containing material that may be soluble in organic solvents.
  • the solvents included with the lithium-containing salt may be organic solvents, and may include one or more carbonates.
  • the solvents may include one or more carbonates including propylene carbonate, ethylene carbonate, ethyl methyl carbonate, dimethyl carbonate, diethyl carbonate, and fluoroethylene carbonate.
  • Combinations of solvents may be included, and may include for example, propylene carbonate and ethyl methyl carbonate as an exemplary combination. Any other solvent may be included that may enable dissolving the lithium-containing salt or salts as well as other electrolyte component, for example, or may provide useful ionic conductivities.
  • battery cell 100 may be any number of layers.
  • the cell may be composed of one layer each of anode and cathode material as sheets, the layers may also be formed into a jelly roll design, or folded design, prismatic design, or any form such that any number of layers may be included in battery cell 100.
  • tab portions of each anode current collector may be coupled together, as may be tab portions of each cathode current collector.
  • a pouch, housing, or enclosure may be formed about the cell to contain electrolyte and other materials within the cell structure, as will be described below. Terminals may extend from the enclosure to allow electrical coupling of the cell for use in devices, including an anode and cathode terminal.
  • FIG.1 is included as an exemplary cell that may be incorporated in battery systems according to the present technology. It is to be understood, however, that any number of battery and battery cell designs and materials that may include charging and discharging capabilities similarly may be encompassed by the present technology.
  • FIG.2 shows a schematic view of a battery 200 according to some embodiments of the present technology. Battery 200 may include any aspect of battery cell 100, and may include any number of battery cells, which may be stacked or incorporated in any number of ways.
  • Battery 200 may include a housing 205, as well as one or more battery cells within the housing.
  • the battery cells may include any feature, component, or characteristic of battery cells described previously, and may include multiple battery cells incorporated as an electrode stack within the housing.
  • the electrode stack may include any number of battery cells or battery cell components, in some embodiments the electrode stack may include at least one anode electrode, and at least one cathode electrode, although the stack may include tens or hundreds of electrodes in embodiments according to the present technology.
  • each electrode may include a current collector, which may provide a path for current to flow to or from the electrode.
  • the battery 200 is illustrated showing an anode current collector 210 and a cathode current collector 215, although the figure and any other figure may also encompass the opposite configuration where the cathode current collector is coupled at the terminals, and the anode current collector is coupled with the housing.
  • the current collectors may each include a tab, which may be a region of the current collector where active material may not be disposed. When multiple battery cells are included, the current collectors at similar potential may be welded together, and then electrically connected with the terminals.
  • Housing 205 may include a first terminal 207 and a second terminal 209, which may both be disposed on a first surface of the housing.
  • battery 200 may include tabs on the current collectors extending from opposite ends.
  • anode current collector 210 may include an electrode tab 212 extending from a first side of the current collector, such as a side proximate or facing the first side of the housing.
  • cathode current collector 215 may include an electrode tab 214 extending from a second side of the current collector, such as a side opposite the first side.
  • any side of a housing or a current collector may be termed first, second, third, or fourth, and it is to be understood that the sides of each component may be in the same direction or different directions in embodiments encompassed by the present technology.
  • the couplings between electrode tabs and terminals or the housing may be formed by any number of materials. For example, a direct welding or coupling may be formed between the tab and the terminal, or an electrical leg may extend between the components.
  • the cathode current collectors may include tabs facing the opposite direction of the terminals, the tabs may be electrically connected with the housing itself, which may operate as a channel to deliver current between the second electrode and the second terminal 209.
  • the housing 205 of the battery may be conductive and may be at the potential of one of the electrodes, such as the cathode, although the housing may also be maintained at anode potential.
  • the second electrode terminal 209 may represent the electrode terminal of the potential at which the housing is maintained. Accordingly, the terminal may be a contact, tab, or access of the housing.
  • the first electrode terminal 207 may be at the opposite potential of the housing and/or the second electrode terminal 209, and may be maintained or electrically isolated from the rest of the housing. Accordingly, by connecting the cathode current collector tab to the housing, the tab may be electrically coupled with the second terminal 209.
  • FIGS.3A-3B are shown schematic views of batteries encompassed by some embodiments of the present technology.
  • battery 300 may include a housing 305, which may include a first terminal 307 and a second terminal 309 extending from a first surface of the housing. Additionally, the battery may include an anode current collector 310 and a cathode current collector 315. The anode current collector may define a tab 312 extending from a first surface of the anode current collector, such as towards the first surface of the housing. The anode tab may be electrically coupled with the first terminal.
  • Cathode current collector 315 may define one or more tabs 317, which may not extend from the first surface in some embodiments. While cathode current collector 315 may be characterized by a first surface facing the first surface of the housing, as well as a second surface opposite the first surface, cathode current collector 315 may have tabs extending from a third surface extending between the first surface and the second surface as illustrated. Accordingly, the tabs on the cathode current collector may extend in a direction substantially perpendicular to a direction in which the tabs on the anode current collector extend. By substantially, it is to be understood that based on manufacturing tolerances, as well as physical movement within the housing, the tabs may not be exactly 90° from one another.
  • Each cathode current collector may also include more than one tab extending from the current collector.
  • a length of each current collector, such as along the third side, may be greater than the width, such as greater than or about two times the width, greater than or about five times the width, greater than or about ten times the width, greater than or about twenty times the width, greater than or about fifty times the width, greater than or about one hundred times the width, or more. Accordingly, by including more than one tab, a more uniform current density may be distributed from the current collector.
  • the tabs 317 may be uniformly spaced along the current collector, in some embodiments the spacing may be non-uniform, which may ensure that current is more uniformly distributed from areas further from the housing terminal.
  • the cathode current collector tabs may be electrically coupled with a busbar 320, which may extend along the housing.
  • the busbar may be made of the same or different material as the current collector, and may be characterized by a thickness that may more readily distribute current.
  • the busbar may be electrically coupled with the second terminal 309.
  • resistance may be greatly reduced from a configuration in which all current must travel the length of the current collector, and then back along an equivalent length of the housing.
  • each current collector may include multiple tabs, which may be joined, welded, bonded, or otherwise coupled together at each location before being connected with the busbar.
  • FIG.3B illustrates an additional embodiment in which both the anode current collectors and the cathode current collectors may be connected with busbars.
  • battery 350 as illustrated may include any component as previously described, as well as any feature or characteristic of batteries, or electrode stacks, as discussed above.
  • Cathode current collector 355, or any number of cathode current collectors may include a number of tabs, which may be coupled with a first busbar 357 as previously described.
  • anode current collector 360 may include a similar configuration.
  • the anode current collector may include any number of tabs, which may be in the same or a different orientation or location as the cathode current collector tabs.
  • anode current collectors may be formed of a material characterized by lower resistance than a material used for cathode current collectors, as previously described. Accordingly, the resistance gains of including the busbar for the anode may not be greater than a potential loss of volume due to the incorporation of the busbar.
  • FIG.4 shows a schematic view of a battery 400 according to some embodiments of the present technology, and which may provide additional benefits over other designs.
  • Battery 400 may include any component, feature, or characteristic of batteries discussed throughout the present disclosure, including housings, electrode stacks, current collectors, or any other feature or component. It is to be understood that any concept or feature discussed previously may be included in battery 400 in some embodiments of the present technology.
  • battery 400 may include a housing 405, in which a battery cell or a number of battery cells as an electrode stack may be included.
  • Housing 405 may include a first terminal 407 disposed on a first side of the housing, and may include a second terminal 409 disposed on the first side of the housing.
  • the housing 405 may be maintained at the potential of one of the electrodes, such as cathode potential, and thus, first terminal 407 may be electrically isolated from the housing as illustrated.
  • a spacer 406 may extend circumferentially about the first electrode terminal through the housing of battery, including along the first surface of housing 405.
  • An electrode stack may be disposed within the housing, and may include any number of components or battery cells in embodiments of the present technology.
  • each of the housing, anode current collector, and cathode current collector may be characterized by a first side, such as the first side of the housing in which the terminals are positioned.
  • the components may include a second side opposite the first side, a third side extending between the first side and the second side, and a fourth side opposite the third side.
  • each side of each component may be the same or different between components.
  • the electrode stack may also include a cathode current collector 415, which may define one or more cathode tabs 417 along the third side of the cathode current collector. These tabs may extend in a direction normal to the direction of the anode tab 412 as previously described. Cathode tabs 417 may be characterized by any of the features or characteristics as previously described, such as the number and/or arrangement of tabs across each cathode current collector, and the cathode tabs may be electrically coupled with the second terminal 409.
  • each cathode current collector may define a plurality of cathode tabs extending from the length of the current collector, and which may be distributed in a uniform or non-uniform spacing along each current collector. Additionally, the cathode current collector tabs may be similarly sized or be formed to different sizes in some embodiments.
  • Each cathode current collector tab may be electrically coupled with a busbar 420, which may include any feature or characteristic of busbars discussed above. Additionally, in some embodiments, busbar 420 may be coupled with the housing at one or more locations as illustrated. [0041] For example, in some embodiments busbar 420 may be coupled with housing 405 along the third surface of housing 405 at any number of locations, which may facilitate electrical coupling.
  • busbar 420 may extend to one or both ends of the housing, and may be electrically coupled with one or both of the first side and/or the second side of the housing 405.
  • the electrical coupling may include welding, bonding, or otherwise connecting the components, which may allow the current collectors to transfer current to the busbar, which may transfer current to the housing for distribution to the second terminal.
  • the busbar and housing may be the same material as the cathode current collectors, and may be any of the materials previously described. By including one or more electrical connections, the resistance for the cathode current collector may be minimized in embodiments of the present technology. This may allow more efficient current transfer along longer current collectors, while minimizing volume use within the housing.
  • FIG.5 shows a schematic view of battery components 500 according to some embodiments of the present technology, and may illustrate an example of coupling current collectors to a busbar encompassed by the present technology.
  • the components illustrated may be included in any battery as previously described, and may illustrate a configuration of components for any of the batteries discussed above.
  • the figure may show a number of cathode current collectors coupled along the third surface as previously explained.
  • Any number of battery cells may be included in embodiments of the present technology, and FIG.5 is intended only to show how components may be coupled, regardless of how many specific components are included.
  • a number of cathode current collectors 505 may extend further in one direction than the anode current collectors 510, which may extend further in a perpendicular direction such as in or out of the page according to this figure. Because the components may extend in different directions, incorporating a separator 515 may be performed to accommodate the extension of each current collector, such as in a first direction, such as from the first side for each anode current collector, and in a second direction, such as from the third side for each cathode current collector.
  • a separator 515 which may be a continuous, wrapped separator in some embodiments, may extend about the fourth side of each cathode current collector, and about the third side of each anode current collector associated with the side of the cathode current collectors from which the tabs extend, and which may be coupled with a busbar. Accordingly, separator 515 may protect the anode current collectors from the coupled cathode current collectors as illustrated.
  • the cathode current collector tabs 507 may be joined together and bonded or welded into a single conductive component at each tab location, as illustrated.
  • a busbar 520 may be coupled with an end of the current collector tabs at each location, and then folded back to limit the height extension within the housing.
  • a spacer 525 may be included between the folded portions of the cathode current collector tabs as shown, which may maintain similar spacing across the length of the electrode stack, and which may facilitate contact with the housing at one or more locations.
  • any narrower range between any stated values or unstated intervening values in a stated range and any other stated or intervening value in that stated range is encompassed.
  • the upper and lower limits of those smaller ranges may independently be included or excluded in the range, and each range where either, neither, or both limits are included in the smaller ranges is also encompassed within the technology, subject to any specifically excluded limit in the stated range.
  • the stated range includes one or both of the limits, ranges excluding either or both of those included limits are also included.
  • any range encompassing or based on any of those values is similarly specifically disclosed.
  • references to “a material” includes a plurality of such materials
  • reference to “the cell” includes reference to one or more cells and equivalents thereof known to those skilled in the art, and so forth.
  • the words “comprise(s)”, “comprising”, “contain(s)”, “containing”, “include(s)”, and “including”, when used in this specification and in the following claims, are intended to specify the presence of stated features, integers, components, or operations, but they do not preclude the presence or addition of one or more other features, integers, components, operations, acts, or groups.

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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)
  • Materials Engineering (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

L'invention concerne des batteries comprenant un boîtier comprenant une première borne disposée sur un premier côté du boîtier et une seconde borne disposée sur le premier côté du boîtier. Les batteries comprennent un empilement d'électrodes positionné à l'intérieur du boîtier. L'empilement d'électrodes comprend un collecteur de courant d'anode. Le collecteur de courant d'anode définit une languette d'anode le long d'un premier côté du collecteur de courant d'anode, et est électriquement couplé à la première borne. L'empilement d'électrodes comprend un collecteur de courant de cathode. Le collecteur de courant de cathode définit une languette de cathode le long d'un second côté du collecteur de courant de cathode. La languette de cathode s'étend à partir du collecteur de courant de cathode dans une direction où la languette d'anode s'étend à partir du collecteur de courant d'anode. La languette de cathode est électriquement couplée à la seconde borne.
PCT/US2022/042874 2021-09-24 2022-09-08 Éléments de batterie dotés de languettes au niveau d'angles droits WO2023048950A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202280062588.6A CN117999678A (zh) 2021-09-24 2022-09-08 具有成直角的极耳的电池单元

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US17/448,808 US11942661B2 (en) 2021-09-24 2021-09-24 Battery cells with tabs at right angles
US17/448,799 2021-09-24
US17/448,793 US11870100B2 (en) 2021-09-24 2021-09-24 Battery cells with tabs at right angles
US17/448,799 US11929522B2 (en) 2021-09-24 2021-09-24 Battery cells with tabs at right angles
US17/448,793 2021-09-24
US17/448,808 2021-09-24

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WO2023048950A1 true WO2023048950A1 (fr) 2023-03-30

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100203380A1 (en) * 2002-12-31 2010-08-12 O'phelan Michael J Batteries including a flat plate design
US20200052265A1 (en) * 2016-10-24 2020-02-13 Sanyo Electric Co., Ltd. Rectangular secondary battery
US20210175567A1 (en) * 2017-06-01 2021-06-10 Samsung Sdi Co., Ltd. Secondary battery having cathode terminal-integrated cap plate

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100203380A1 (en) * 2002-12-31 2010-08-12 O'phelan Michael J Batteries including a flat plate design
US20200052265A1 (en) * 2016-10-24 2020-02-13 Sanyo Electric Co., Ltd. Rectangular secondary battery
US20210175567A1 (en) * 2017-06-01 2021-06-10 Samsung Sdi Co., Ltd. Secondary battery having cathode terminal-integrated cap plate

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