WO2008013371A1 - Electrode assembly having electrode tabs of the same size in joint portion thereof and electrochemical cell containing the same - Google Patents

Electrode assembly having electrode tabs of the same size in joint portion thereof and electrochemical cell containing the same Download PDF

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Publication number
WO2008013371A1
WO2008013371A1 PCT/KR2007/003411 KR2007003411W WO2008013371A1 WO 2008013371 A1 WO2008013371 A1 WO 2008013371A1 KR 2007003411 W KR2007003411 W KR 2007003411W WO 2008013371 A1 WO2008013371 A1 WO 2008013371A1
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WIPO (PCT)
Prior art keywords
electrode
tabs
electrode assembly
cathode
leads
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/KR2007/003411
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French (fr)
Inventor
Ji Heon Ryu
Eun Ju Lee
Jeong Hee Choi
Youngjoon Shin
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LG Chem Ltd
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LG Chem Ltd
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Filing date
Publication date
Application filed by LG Chem Ltd filed Critical LG Chem Ltd
Priority to US12/309,548 priority Critical patent/US8846243B2/en
Publication of WO2008013371A1 publication Critical patent/WO2008013371A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/04—Hybrid capacitors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/10—Multiple hybrid or EDL capacitors, e.g. arrays or modules
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/10—Multiple hybrid or EDL capacitors, e.g. arrays or modules
    • H01G11/12—Stacked hybrid or EDL capacitors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/22—Electrodes
    • H01G11/26—Electrodes characterised by their structure, e.g. multi-layered, porosity or surface features
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/22—Electrodes
    • H01G11/26—Electrodes characterised by their structure, e.g. multi-layered, porosity or surface features
    • H01G11/28—Electrodes characterised by their structure, e.g. multi-layered, porosity or surface features arranged or disposed on a current collector; Layers or phases between electrodes and current collectors, e.g. adhesives
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/22—Electrodes
    • H01G11/30—Electrodes characterised by their material
    • H01G11/50—Electrodes characterised by their material specially adapted for lithium-ion capacitors, e.g. for lithium-doping or for intercalation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/74—Terminals, e.g. extensions of current collectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/74—Terminals, e.g. extensions of current collectors
    • H01G11/76—Terminals, e.g. extensions of current collectors specially adapted for integration in multiple or stacked hybrid or EDL capacitors
    • 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
    • H01M10/052—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
    • H01M10/0583—Construction or manufacture of accumulators with folded construction elements except wound ones, i.e. folded positive or negative electrodes or separators, e.g. with "Z"-shaped electrodes or separators
    • 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
    • H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/64—Carriers or collectors
    • H01M4/66—Selection of materials
    • H01M4/661—Metal or alloys, e.g. alloy coatings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • 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
    • H01M50/534—Electrode connections inside a battery casing characterised by the material of the leads or tabs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • 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
    • H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
    • 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
    • H01M50/538—Connection of several leads or tabs of wound or folded electrode stacks
    • 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
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G9/004—Details
    • H01G9/14—Structural combinations or circuits for modifying, or compensating for, electric characteristics of electrolytic capacitors
    • 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
    • H01M2220/10—Batteries in stationary systems, e.g. emergency power source in plant
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • 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
    • Y02E60/13—Energy storage using capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • an object of the present invention to provide an electrode assembly having a structure in which the lengths of electrode tabs at a joint portion between the electrode tabs and an electrode lead are the same while the bending of the electrode tabs is minimized.
  • FIG. 3 is a typical view illustrating the structure of a stacking type electrode assembly according to a preferred embodiment of the present invention.
  • FIG. 4 is an enlarged view illustrating the connection between cathode tabs, joined to each other in a concentrated state, and a cathode lead of the electrode assembly shown in FIG. 3.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Electric Double-Layer Capacitors Or The Like (AREA)
  • Secondary Cells (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

Disclosed herein is a stacking or stacking/folding type electrode assembly of a cathode/separator/anode structure, wherein the electrode assembly is constructed in a structure in which tabs (electrode tabs), having no active material applied thereto, protrude from electrode plates constituting the electrode assembly, electrode leads are located at one-side ends of the stacked electrode tabs such that the electrode leads are electrically connected to the electrode tabs, and protruding lengths of the electrode tabs are gradually increased according to the distances between the electrode leads and the electrode tabs, whereby the lengths of the electrode tabs at joint portions between the electrode tabs and the electrode leads are the same. Also disclosed is an electrochemical cell including the electrode assembly.

Description

ELECTRODE ASSEMBLY HAVING ELECTRODE TABS OF THE
SAME SIZE IN JOINT PORTION THEREOF AND ELECTROCHEMICAL CELL CONTAINING THE SAME
FIELD OF THE INVENTION
The present invention relates to an electrode assembly having electrode tabs of the same size in a joint portion thereof, and, more particularly, to a stacking or stacking/folding type electrode assembly of a cathode/separator/anode structure, wherein the electrode assembly is constructed in a structure in which tabs (electrode tabs), having no active material applied thereto, protrude from electrode plates constituting the electrode assembly, electrode leads are located at one-side ends of the stacked electrode tabs such that the electrode leads are electrically connected to the electrode tabs, and protruding lengths of the electrode tabs are gradually increased according to the distances between the electrode leads and the electrode tabs, whereby the lengths of the electrode tabs at joint portions between the electrode tabs and the electrode leads are the same.
BACKGROUND OF THE INVENTION
As mobile devices have been increasingly developed, and the demand for such mobile devices has increased, the demand for batteries has also sharply increased as an energy source for the mobile devices. Also, much research on batteries satisfying various needs has been carried out.
In terms of the shape of batteries, the demand for prismatic secondary batteries or pouch-shaped secondary batteries, which are thin enough to be applied to products, such as mobile phones, is very high. In terms of the material for batteries, on the other hand, the demand for lithium secondary batteries, such as lithium ion batteries and lithium ion polymer batteries, having high energy density, high discharge voltage, and high output stability, is very high.
Furthermore, secondary batteries may be classified based on the construction of an electrode assembly having a cathode/separator/anode structure. For example, the electrode assembly may be constructed in a jelly-roll (winding) type structure in which long-sheet type cathodes and long-sheet type anodes are wound while separators are disposed respectively between the cathodes and the anodes, a stacking type structure in which pluralities of cathodes and anodes having a predetermined size are successively stacked while separators are disposed respectively between the cathodes and the anodes, or a stacking/folding type structure in which pluralities of cathodes and anodes having a predetermined size are successively stacked while separators are disposed respectively between the cathodes and the anodes to constitute a bi-cell or a full-cell, and then the bi-cell or the full-cell is wound.
FIG. 1 is a side view typically illustrating the general structure of a conventional representative stacking type electrode assembly.
Referring to FIG. 1, the stacking type electrode assembly 10 is constructed in a structure in which cathodes 20, each of which has a cathode active material 22 applied to the opposite major surfaces of a cathode current collector 21, and anodes 30, each of which has an anode active material 32 applied to the opposite major surfaces of an anode current collector 31, are sequentially stacked while separators 70 are disposed respectively between the cathodes 20 and the anodes 30.
From one-side ends of the cathode current collectors 21 and the anode current collectors 31 protrude pluralities of cathode tabs 41 and anode tabs 51, to which an active material is not applied, such that the cathode tabs 41 and the anode tabs 51 are electrically connected to a cathode lead 60 and an anode lead (not shown) constituting electrode terminals of a battery (not shown). The cathode tabs 41 and the anode tabs 51 are joined in a concentrated state, and are then connected to the cathode lead 60 and the anode lead, respectively. This structure is more clearly illustrated in FIG. 2, which is a partially enlarged view typically illustrating the joint portion between the cathode tabs and the cathode lead. FIG. 2 illustrates only the joint portion between the cathode tabs and the cathode lead for convenience of description, although this structure is also applied to the joint portion between the anode tabs and the anode lead.
Referring to FIG. 2, the cathode tabs 40 are brought into tight contact with each other in the direction indicated by an arrow, and are connected to the cathode lead 60. Specifically, the cathode tabs 40 are brought into tight contact with the cathode lead 60 adjacent to the lowermost cathode tab 42 such that the cathode tabs 40 are joined to each other with the smallest bending length. Consequently, the length difference occurs at a joint portion A of the cathode tabs 40 between the lowermost cathode tab 42, which is a short distance from the cathode lead 60, and the uppermost cathode tab 41, which is a long distance from the cathode lead 60, due to the distance difference between the cathode tabs 40 and the cathode lead 60. Of course, this length difference also occurs at a joint portion between the anode tabs and the anode lead. Due to this structure, the areas where the electrode tabs are in contact with the electrode lead are different from each other at the joint portion between the electrode tabs and the electrode lead of the electrode assembly, with the result that the use of electrode leads having more than a necessary size is inevitable. This is because the size of the electrode lead is set based on the electrode tab having the largest contact area so as to fix the electrode tabs, the thickness of which is much less than the electrode lead. In addition, the structural stability of the electrode assembly having the above-described structure is lowered for this reason.
In order to solve the above-mentioned problem, there has been proposed a technology for joining electrode tabs, while the electrode tabs are in tight contact with each other in one direction, and uniformly cutting the electrode tabs using a cutter. When using this technology, however, burrs occur at the cut ends of the electrode tabs, when the electrode tabs are cut. In addition, it is necessary to additionally perform a cutting process.
On the other hand, it is possible to bend the end of the electrode lead to a predetermined angle, the short-distance electrode tab to a large angle, and the longdistance electrode tab to a small angle in order to reduce the length difference between the electrode tabs at the joint portion thereof. In this structure, however, the size of the joint portion between the electrode tabs and the electrode lead is increased due to the bending, with the result that the electrode assembly may move, when external impacts are applied to the electrode assembly, and therefore, a possibility of the occurrence of a short circuit is strong. Especially for a middle- or large-sized battery cell, the thickness of the electrode lead is approximately twice that of a small-sized battery cell, with the result that it is more difficult to apply the above-described structure. Consequently, there is a high necessity for an electrode assembly having an improved structure in which the lengths of the electrode tabs at the joint portion thereof are the same while the bending of the electrode tabs is minimized.
SUMMARY OF THE INVENTION
Therefore, the present invention has been made to solve the above problems, and other technical problems that have yet to be resolved.
Specifically, it is an object of the present invention to provide an electrode assembly having a structure in which the lengths of electrode tabs at a joint portion between the electrode tabs and an electrode lead are the same while the bending of the electrode tabs is minimized.
It is another object of the present invention to provide an electrode assembly having a structure in which the joining between the electrode tabs and the electrode lead is stably performed while the size of the electrode lead is small.
It is a further object of the present invention to provide an electrochemical cell including the electrode assembly.
In accordance with one aspect of the present invention, the above and other objects can be accomplished by the provision of a stacking or stacking/folding type electrode assembly of a cathode/separator/anode structure, wherein the electrode assembly is constructed in a structure in which tabs (electrode tabs), having no active material applied thereto, protrude from electrode plates constituting the electrode assembly, electrode leads are located at one-side ends of the stacked electrode tabs such that the electrode leads are electrically connected to the electrode tabs, and protruding lengths of the electrode tabs are gradually increased according to the distances between the electrode leads and the electrode tabs, whereby the lengths of the electrode tabs at joint portions between the electrode tabs and the electrode leads are the same.
According to the present invention, the electrode leads are not particularly restricted so long as the electrode leads are made of a material that can be electrically connected to the electrode tabs. Preferably, the electrode leads are made of a metal plate. The metal plate may be selected from a group consisting of an aluminum plate, a copper plate, a nickel plate, a copper plate coated with nickel, and a SUS plate.
Also, the electrode leads are not particularly restricted so long as the electrode leads are constructed in a structure in which the electrode leads are easily connected to the electrode tabs. For example, the electrode leads may be formed in the shape of a straight line in vertical section, and the electrode leads are joined to the electrode tabs by welding. The electrode leads may be connected to the electrode tabs in various manners. Preferably, the electrode leads are more stably connected to the electrode tabs by welding. The welding may include ultrasonic welding, laser welding, and resistance welding.
In the present invention, the one-side end of the stacked electrode tabs, where each electrode lead is preferably located, means the upper-side end of the electrode tab located at the uppermost position in the direction in which the electrode tabs are stacked (the uppermost electrode tab) or the lower-side end of the electrode tab located at the lowermost position in the direction in which the electrode tabs are stacked (the lowermost electrode tab). Consequently, the direction in which the protruding lengths of the electrode tabs are increased may be changed depending upon which side end of the stacked electrode tabs each electrode lead is located at. For example, when each electrode lead is located at the upper-side end of the uppermost electrode tab, it is preferable that the protruding lengths of the electrode tabs be gradually increased from the uppermost electrode tab to the lowermost electrode tab.
In accordance with another aspect of the present invention, there is provided an electrochemical cell including the electrode assembly with the above-stated construction.
The electrochemical cell is one that provides electricity through an electrochemical reaction. For example, the electrochemical cell may be an electrochemical secondary battery or an electrochemical capacitor. Especially, the electrochemical cell is preferably applied to a lithium secondary battery.
The secondary battery includes an electrode assembly that can be charged and discharged. Preferably, the secondary battery is constructed in a structure in which an electrode assembly is mounted in a battery case made of a laminate sheet including a metal layer and a resin layer in a sealed state. The secondary battery with the above- described structure may be referred to as a pouch-shaped secondary battery.
Also, the secondary battery is preferably used as a unit cell for high-output, large-capacity battery packs.
BRIEF DESCRIPTION OF THE DRAWINGS
The above and other objects, features and other advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a typical view illustrating the general structure of a conventional stacking type electrode assembly; FIG. 2 is an enlarged view illustrating the connection between cathode tabs, joined to each other in a concentrated state, and a cathode lead of the electrode assembly shown in FIG. 1 ;
FIG. 3 is a typical view illustrating the structure of a stacking type electrode assembly according to a preferred embodiment of the present invention; and
FIG. 4 is an enlarged view illustrating the connection between cathode tabs, joined to each other in a concentrated state, and a cathode lead of the electrode assembly shown in FIG. 3.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
Now, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted, however, that the scope of the present invention is not limited by the illustrated embodiments.
FIG. 3 is a typical view illustrating the structure of a stacking type electrode assembly according to a preferred embodiment of the present invention. The electrode assembly of FIG. 3 is approximately identical to the conventional electrode assembly, which is being generally used, and therefore, only the characteristics of the present invention will be described hereinafter. FIG. 3 illustrates only cathode tabs for convenience of description, although this structure is also applied to anode tabs.
Referring to FIG. 3, the electrode assembly 100 includes cathode plates 200 having cathode tabs 300 the protruding lengths of which are different. The respective cathode tabs 300 protrude from cathode current collectors 210 while a cathode active material 220 is not applied to the respective cathode tabs 300. The cathode plates 200 are stacked in a structure in which a cathode plate 202 having a cathode tab 302, the protruding length of which is the smallest is located at the lowermost position, and a cathode plate 201 having a cathode tab 301, the protruding length of which is the largest is located at the uppermost position, such that the protruding lengths of the cathode tabs 300 are gradually increased from the lowermost position to the uppermost position. At this time, a cathode lead 400, which is joined to the cathode tabs 300, is located adjacent to the bottom of the cathode tab 302 protruding from the cathode plate 202 located at the lowermost position. Consequently, the cathode tabs 300 are brought into tight contact with each other in the direction in which the cathode lead 400 is located such that the cathode tabs 300 are joined to each other with the minimum bending length. This structure is more clearly illustrated in FIG. 4, which is a partially enlarged view typically illustrating the joint portion between the cathode tabs and the cathode lead.
Referring to FIG. 4, the cathode tabs 300 are brought into tight contact with each other in the direction indicated by an arrow, and are then connected to the cathode lead 400. At this time, the cathode tab 302, located at the lowermost position, is little bent, and the bending angle is gradually increased toward the cathode tab 301, located at the uppermost position. Consequently, the cathode tabs 300 have the same joint length L3 at a joint portion B due to the difference between the bending angles, although the cathode tabs 300 have different protruding lengths.
The joint length L3 corresponds to the length of the lowermost cathode tab 302, which is little bent. Consequently, the joint length L3 is less than the joint length L1 set based on the lowermost cathode tab 42 having the largest length at the joint portion A, as shown in FIG. 2. As a result, the length L4 of the cathode lead, corresponding to the joint length L3 of the cathode tabs 300, is also less than the length L2 of the cathode lead as shown in FIG. 2.
On the other hand, the cathode tabs 300 are bent based on the lowermost cathode tab 302, which is little bent, and therefore, the cathode tabs 300 have the smallest bending length L5.
Hereinafter, examples of the present invention will be described in more detail. It should be noted, however, that the scope of the present invention is not limited by the illustrated examples.
[Example 1]
A cathode active material containing lithium and an anode active material containing graphite were applied to opposite major surfaces of an aluminum foil and a copper foil, respectively, and then the aluminum foil and the copper foil were cut such that tab parts, of the cut aluminum foils and the cut copper foils, to which the active materials were not applied, had gradually increased lengths. Subsequently, the cut aluminum foils and the cut copper foils were stacked using separators in the structure shown in FIG. 3. After that, the tab parts of the cut aluminum foils and the cut copper foils were brought into tight contact with each other, as shown in FIG. 4, in the direction in which the cut aluminum foils and the cut copper foils were stacked, and were connected to corresponding electrode leads to manufacture an electrode assembly.
[Comparative example 1]
An electrode assembly was manufactured in the same method as Example 1 except that the aluminum foil and the copper foil were cut such that tab parts, of the cut aluminum foils and the cut copper foils, to which the active materials were not applied, had the same length.
The tab ends of the electrode assembly manufactured according to Example 1 and Comparative example 1 were observed, using a microscope, to inspect the surface state thereof. The observation results revealed that burrs were formed at the cut ends of the electrode assembly according to Comparative example 1 , the electrode tabs of which were cut with the same length. As previously described, the burrs damage the corresponding regions of the battery case, during the assembly or the use of a battery, with the result that a short circuit may occur in the battery or an electrolyte may leak from the battery.
INDUSTRIAL APPLICABILITY
As apparent from the above description, the electrode assembly according to the present invention has the following effects. The electrode assembly is constructed in a structure in which the lengths of electrode tabs at a joint portion between the electrode tabs and an electrode lead are the same while the bending of the electrode tabs is minimized. Furthermore, the electrode assembly is constructed in a structure in which the joining between the electrode tabs and the electrode lead is stably performed while the size of the electrode lead is small.
Although the preferred embodiment of the present invention has been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

Claims

WHAT IS CLAIMED IS:
1. A stacking or stacking/folding type electrode assembly of a cathode/separator/anode structure, wherein the electrode assembly is constructed in a structure in which tabs (electrode tabs), having no active material applied thereto, protrude from electrode plates constituting the electrode assembly, electrode leads are located at one-side ends of the stacked electrode tabs such that the electrode leads are electrically connected to the electrode tabs, and protruding lengths of the electrode tabs are gradually increased according to the distances between the electrode leads and the electrode tabs, whereby the lengths of the electrode tabs at joint portions between the electrode tabs and the electrode leads are the same.
2. The electrode assembly according to claim 1, wherein the electrode leads are made of a metal plate.
3. The electrode assembly according to claim 2, wherein the metal plate is selected from a group consisting of an aluminum plate, a copper plate, a nickel plate, a copper plate coated with nickel, and a SUS plate.
4. The electrode assembly according to claim 1, wherein the electrode leads are formed in the shape of a straight line in vertical section, and the electrode leads are joined to the electrode tabs by welding.
5. An electrochemical cell including an electrode assembly according to any one of claims 1 to 4.
6. The electrochemical cell according to claim 5, wherein the electrochemical cell is a secondary battery or a capacitor.
7. The electrochemical cell according to claim 6, wherein the secondary battery is constructed in a structure in which an electrode assembly is mounted in a battery case made of a laminate sheet including a metal layer and a resin layer in a sealed state.
8. The electrochemical cell according to claim 7, wherein the secondary battery is a unit cell for high-output, large-capacity battery packs.
PCT/KR2007/003411 2006-07-24 2007-07-14 Electrode assembly having electrode tabs of the same size in joint portion thereof and electrochemical cell containing the same Ceased WO2008013371A1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2674999A4 (en) * 2011-06-30 2014-11-26 Lg Chemical Ltd SECONDARY BATTERY HAVING ENHANCED CONTACT RESISTANCE
EP2602845A4 (en) * 2010-09-27 2016-03-23 Lg Chemical Ltd ELECTRODE ROD COMPRISING A CORROSION PROTECTION LAYER, AND RECHARGEABLE BATTERY COMPRISING SAID ELECTRODE ROD
EP2566906B1 (en) 2010-05-06 2019-07-31 Covestro Deutschland AG Polyisocyanate prepolymers and use thereof

Families Citing this family (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2995715B2 (en) 1996-06-07 1999-12-27 三菱電線工業株式会社 Detention part of iron wire sheathing cable
US7875382B2 (en) * 2008-08-28 2011-01-25 International Battery, Inc. Battery
KR101101046B1 (en) * 2009-12-01 2011-12-29 삼성에스디아이 주식회사 Electrode assembly and secondary battery having same
US20110206976A1 (en) 2010-02-19 2011-08-25 Kyung-Mo Yoo Electrode assembly and secondary battery using the same
JP5932997B2 (en) 2011-07-13 2016-06-08 エルジー・ケム・リミテッド BATTERY MODULE WITH IMPROVED CONNECTION RELIABILITY AND MEDIUM AND LARGE BATTERY PACK WITH THE SAME
WO2014027606A1 (en) * 2012-08-14 2014-02-20 株式会社 豊田自動織機 Electrical storage device
KR101482385B1 (en) * 2013-02-08 2015-01-20 주식회사 엘지화학 Stepwise Cell Assembly
US20150136840A1 (en) * 2013-11-21 2015-05-21 Medtronic, Inc. Method of joining stacks of thin metal foil layers
JP2016039041A (en) * 2014-08-07 2016-03-22 株式会社Ｇｓユアサ Storage element and method for manufacturing the same
CN107408659B (en) 2014-10-10 2020-11-13 株式会社Lg化学 Electrode assembly and method of making the same
JP6415959B2 (en) * 2014-12-11 2018-10-31 株式会社東芝 Electrode group, battery, and battery manufacturing method
DE102015201655A1 (en) 2015-01-30 2016-08-04 Robert Bosch Gmbh Battery cell and battery system
DE102015201652A1 (en) 2015-01-30 2016-08-04 Robert Bosch Gmbh Battery cell, method of manufacturing an electrode coil for a battery cell and battery system
DE102015201658A1 (en) 2015-01-30 2016-08-04 Robert Bosch Gmbh Battery cell and battery system
KR101870314B1 (en) * 2015-04-16 2018-06-22 주식회사 엘지화학 Electrode Assembly Comprising Coupling Part between Electrode Tabs and Electrode Lead Located at Space Portion
WO2016177425A1 (en) * 2015-05-06 2016-11-10 Schukra Gerätebau Gmbh Method and apparatus for processing a fiber cushion body
KR102288544B1 (en) 2015-06-29 2021-08-11 삼성에스디아이 주식회사 Secondary Battery And Fabricating Method Thereof
KR102459618B1 (en) 2015-09-23 2022-10-27 삼성에스디아이 주식회사 secondary battery
KR102384021B1 (en) 2015-09-24 2022-04-07 삼성에스디아이 주식회사 Electrode assembly and secondary battery having the same
KR102042999B1 (en) * 2016-02-05 2019-11-11 주식회사 엘지화학 Method for Preparation of Stack and Folding-typed Electrode Assembly Having Electrode Taps with Various-Sized
KR102101010B1 (en) * 2016-03-08 2020-04-14 주식회사 엘지화학 Electrode assembly and secondary battery comprising the same
KR102289692B1 (en) * 2016-09-06 2021-08-13 삼성에스디아이 주식회사 The methode of an electrode tab and a rechargeable battery
KR102234993B1 (en) * 2016-12-21 2021-04-01 주식회사 엘지화학 Battery Cell and Manufacturing Method thereof
KR102570970B1 (en) * 2020-03-20 2023-08-25 삼성에스디아이 주식회사 Electrode assembly
EP4173079A1 (en) 2020-06-25 2023-05-03 Medtronic, Inc. Shaped rechargeable battery electronic interconnect
CN113871807A (en) * 2020-06-30 2021-12-31 比亚迪股份有限公司 Batteries and battery packs
CN111933883B (en) * 2020-08-06 2022-10-14 东莞市万连实业有限公司 Adapter sheet for high-capacity battery and preparation method thereof
CN114204222B (en) * 2020-08-31 2023-11-14 比亚迪股份有限公司 Battery and battery pack
CN114204220B (en) * 2020-08-31 2023-04-07 比亚迪股份有限公司 Battery cell, battery and battery pack
CN112117497A (en) * 2020-10-09 2020-12-22 昆山聚创新能源科技有限公司 Battery cell and battery cell forming method
JP7523315B2 (en) * 2020-10-27 2024-07-26 日産自動車株式会社 All-solid-state battery
WO2022133710A1 (en) * 2020-12-22 2022-06-30 宁德新能源科技有限公司 Electrochemical device and electrical device
KR102819969B1 (en) * 2021-02-17 2025-06-13 주식회사 엘지에너지솔루션 Electrode tab, electrode assembly and secondary battery including the same
WO2023059009A1 (en) * 2021-10-08 2023-04-13 주식회사 엘지에너지솔루션 Secondary battery
JP7798433B2 (en) * 2021-11-29 2026-01-14 エルジー エナジー ソリューション リミテッド Electrode tab welding device, electrode tab welding method, and secondary battery
JP7789719B2 (en) * 2023-06-08 2025-12-22 プライムプラネットエナジー＆ソリューションズ株式会社 Secondary battery and manufacturing method thereof
WO2025095582A1 (en) * 2023-11-01 2025-05-08 주식회사 엘지에너지솔루션 Electrode assembly, battery cell including same, and electrode lead welding method
EP4661143A1 (en) * 2024-06-05 2025-12-10 Renata AG A battery comprising a stack of electrodes with superposed tabs
CN119601571A (en) * 2024-11-21 2025-03-11 湖北亿纬动力有限公司 Electrode, battery cell, battery pack and electrode design method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6423442B1 (en) * 1999-03-04 2002-07-23 Wilson Greatbatch Ltd. Cell stack design with bi-directionally wound slotted electrodes and method for making
JP2003123743A (en) * 2001-10-12 2003-04-25 Sony Corp Solid electrolyte battery and method of manufacturing the same
KR20030095519A (en) * 2002-06-12 2003-12-24 주식회사 코캄엔지니어링 Method for treating eletcrode tab of crude cell for lithium secondary battery & crude cell according to the method & lithium secondary battery therefrom
US6849358B2 (en) * 2001-04-06 2005-02-01 Ngk Spark Plug Co., Ltd. Lithium ion battery

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4098966A (en) * 1977-11-14 1978-07-04 General Motors Corporation Welded battery elements and process
JPH0752827A (en) 1993-08-09 1995-02-28 Nissan Motor Co Ltd instrument panel
JPH08111216A (en) * 1994-10-12 1996-04-30 Sanyo Electric Co Ltd Manufacture of battery
JPH08250103A (en) * 1995-03-13 1996-09-27 Nippondenso Co Ltd Manufacture of square battery
JP3686242B2 (en) * 1997-12-04 2005-08-24 松下電器産業株式会社 Battery stack electrode connection method and battery
US6617074B1 (en) * 1999-06-30 2003-09-09 Mitsubishi Materials Corporation Lithium ion polymer secondary battery and gelatinous polymer electrolyte for sheet battery
JP3729164B2 (en) * 2002-08-05 2005-12-21 日産自動車株式会社 Automotive battery
JP4483162B2 (en) * 2002-08-22 2010-06-16 日産自動車株式会社 Multilayer battery, battery pack, battery module and electric vehicle
JP4211322B2 (en) * 2002-08-26 2009-01-21 日産自動車株式会社 Multilayer battery, battery pack, battery module and electric vehicle
KR20040048295A (en) * 2002-12-02 2004-06-07 히다치 막셀 가부시키가이샤 Battery
US8088516B2 (en) * 2005-11-18 2012-01-03 Acme Aerospace, Inc. Storage battery electrodes with integral conductors
JP5219340B2 (en) * 2006-03-08 2013-06-26 三洋電機株式会社 Negative electrode for lithium secondary battery, method for producing the same, and lithium secondary battery
KR100863730B1 (en) * 2006-09-04 2008-10-16 주식회사 엘지화학 Battery cell having a fine groove formed on the outer surface and a battery pack comprising the same
JP2015123743A (en) * 2013-12-27 2015-07-06 株式会社リコー Solid molding system, solid information processing program, and solid object production method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6423442B1 (en) * 1999-03-04 2002-07-23 Wilson Greatbatch Ltd. Cell stack design with bi-directionally wound slotted electrodes and method for making
US6849358B2 (en) * 2001-04-06 2005-02-01 Ngk Spark Plug Co., Ltd. Lithium ion battery
JP2003123743A (en) * 2001-10-12 2003-04-25 Sony Corp Solid electrolyte battery and method of manufacturing the same
KR20030095519A (en) * 2002-06-12 2003-12-24 주식회사 코캄엔지니어링 Method for treating eletcrode tab of crude cell for lithium secondary battery & crude cell according to the method & lithium secondary battery therefrom

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2566906B1 (en) 2010-05-06 2019-07-31 Covestro Deutschland AG Polyisocyanate prepolymers and use thereof
EP2602845A4 (en) * 2010-09-27 2016-03-23 Lg Chemical Ltd ELECTRODE ROD COMPRISING A CORROSION PROTECTION LAYER, AND RECHARGEABLE BATTERY COMPRISING SAID ELECTRODE ROD
EP2674999A4 (en) * 2011-06-30 2014-11-26 Lg Chemical Ltd SECONDARY BATTERY HAVING ENHANCED CONTACT RESISTANCE
US9136508B2 (en) 2011-06-30 2015-09-15 Lg Chem, Ltd. Secondary battery with enhanced contact resistance

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US8846243B2 (en) 2014-09-30
CN101517807A (en) 2009-08-26
KR100848788B1 (en) 2008-07-30
CN102522519A (en) 2012-06-27
CN102522519B (en) 2015-09-16
JP5846932B2 (en) 2016-01-20
KR20080009351A (en) 2008-01-29
JP2008027891A (en) 2008-02-07
JP2012124171A (en) 2012-06-28
US20100028770A1 (en) 2010-02-04

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