WO2010062037A2 - Procédé de fabrication d’un accumulateur et accumulateur - Google Patents

Procédé de fabrication d’un accumulateur et accumulateur Download PDF

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Publication number
WO2010062037A2
WO2010062037A2 PCT/KR2009/006040 KR2009006040W WO2010062037A2 WO 2010062037 A2 WO2010062037 A2 WO 2010062037A2 KR 2009006040 W KR2009006040 W KR 2009006040W WO 2010062037 A2 WO2010062037 A2 WO 2010062037A2
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WO
WIPO (PCT)
Prior art keywords
negative electrode
positive electrode
separator
plate
tab
Prior art date
Application number
PCT/KR2009/006040
Other languages
English (en)
Korean (ko)
Other versions
WO2010062037A3 (fr
Inventor
김종성
박준용
Original Assignee
(주)엠플러스
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 KR1020090087164A external-priority patent/KR101108118B1/ko
Application filed by (주)엠플러스 filed Critical (주)엠플러스
Priority to US13/131,325 priority Critical patent/US20110244287A1/en
Priority to CN200980147452XA priority patent/CN102272998A/zh
Priority to JP2011538542A priority patent/JP2012513076A/ja
Publication of WO2010062037A2 publication Critical patent/WO2010062037A2/fr
Publication of WO2010062037A3 publication Critical patent/WO2010062037A3/fr
Priority to US14/196,020 priority patent/US20140186671A1/en
Priority to US14/195,980 priority patent/US20140182118A1/en

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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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0431—Cells with wound or folded electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H01M50/553—Terminals adapted for prismatic, pouch 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
    • 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
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/46—Separators, membranes or diaphragms characterised by their combination with electrodes
    • 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
    • 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

  • the present invention relates to a secondary battery manufacturing method and a secondary battery, and more particularly, to simplify the manufacturing process, high-speed mass production is advantageous, and can be expected to improve the safety of the battery and the improvement of battery performance, in particular,
  • the present invention relates to a secondary battery manufacturing method and a secondary battery capable of high rate charge / discharge using a multi-tap portion.
  • battery an apparatus comprising an electro-chemical cell and a collection of cells that supply a potential between at least one set of terminals.
  • the terminals of the battery may be connected to an electrical, eg, direct current (DC) load to provide energy or voltage to that load.
  • Batteries include batteries, wet cells (eg, lead-acid cells), and other devices that convert chemically available electromotive force into current.
  • secondary batteries are manufactured using an electrode assembly having a three-layer structure of a positive electrode plate / separator / anode plate or a multilayer structure of five or more layers of positive electrode plate / separator / cathode plate / separator / anode plate. ", And its capacity is not infinite, but it is possible to repeatedly use the same battery by reversely discharging to some extent.
  • the present invention is to solve the problems as described above, the object of the present invention is to simplify the manufacturing process is a high-speed mass production is advantageous, the new secondary battery manufacturing method that can expect the efficiency, such as improved manufacturing safety and improved battery performance And to provide a secondary battery.
  • the present invention can prevent the tolerance between the positive electrode and the negative electrode (for example, the phenomenon in which the positive electrode and the negative electrode is distorted in place), and fatal battery safety due to foreign matter (particles) and burrs at the time of electrode cutting It is an object of the present invention to provide a secondary battery manufacturing method and secondary battery which can prevent defects and improve battery reliability.
  • the two separators 10 are disposed on the upper and lower sides of the cathode plate 30 and the anode plate 40 is disposed above or below the upper separator 10. And disposing the separator / cathode plate / separator / anode plate to one side of the mandrel 20 along the same feed line with respect to one end of the cathode plate 30 and the cathode plate 40 which are continuously supplied.
  • a plurality of negative electrode tabs 32 are formed on the negative electrode plate 30 at regular intervals (g) by punching one end and / or the other end in the longitudinal direction crossing the conveying direction, and a plurality of positive electrode tabs 42 are formed on the positive electrode plate.
  • a secondary battery manufacturing method comprising the following process of cutting a separator / cathode plate / separator / anode plate using a cutting unit.
  • a plurality of negative electrode tabs 32 are formed on the negative electrode plate 30 at a predetermined interval (g), and the plurality of positive electrode tabs 42 are formed. It is characterized in that the positive electrode tab 42 and the negative electrode tab 32 are provided at one end in the longitudinal direction of the electrode assembly 50 by forming a predetermined interval (g) on the positive electrode plate (40).
  • a plurality of negative electrode tabs 32 are formed at one end of the negative electrode plate 30 at predetermined intervals g, and both sides of the positive electrode plate 40 in a vertical direction.
  • a plurality of positive electrode tabs 42 are formed at the other end of the positive electrode plate 40 at predetermined intervals (g) such that the positive electrode tabs 42 are positioned at the other end opposite to the negative electrode tab 32 of the negative electrode plate 30.
  • the positive electrode tab 42 and the negative electrode tab 32 are respectively provided at both ends in the longitudinal direction of the assembly 50.
  • the two separators 10 are disposed on the upper and lower parts with respect to the negative electrode plate 30, and the positive electrode plate 40 is disposed above the upper separator 10 or below the lower separator 10.
  • It provides a secondary battery manufacturing method comprising a process of putting.
  • Edge cutting portions 57 are formed on the negative electrode tab 32 and the positive electrode tab 42 by cutting horizontal edges of the negative electrode tab 32 and the positive electrode tab 42 of the electrode assembly 50. ) And bonding the positive lead terminal 44 and the negative lead terminal 34 to the negative electrode tab 32 and the positive electrode tab 42, respectively.
  • a process of fusion bonding the pouch 90 to seal the electrode assembly 50 is performed.
  • a plurality of positive electrode tabs and negative electrode tabs are formed on the positive electrode plate and the negative electrode plate by punching while supplying the separator / cathode plate / separator / anode plate along the transfer line, and then a separator / negative plate / separator / anode plate is formed using a mandrel. Winding the laminate to form an electrode assembly, it is possible to quickly form a large amount of electrode assembly in a continuous process, there is an effect that the manufacturing process is simplified compared to the existing laminated type manufacturing process, very high speed mass production It is advantageous and effects such as improvement of manufacturing safety can be obtained.
  • the winding (winding) type of shape can reduce the interfacial resistance between the electrodes to stabilize the distribution of the battery characteristics, it is possible to eliminate foreign matter (particles, etc.) and burrs generated due to the electrode cutting battery safety And it has an effect that greatly contributes to the improvement of assembly yield.
  • the positive electrode tab and the negative electrode tab portion are composed of multi-taps, the electric mobility is improved, thereby improving performance as a high-rate battery, and the positive electrode tab or the negative electrode tab portion is not significantly affected by the position shift phenomenon.
  • the separator / cathode plate / separator / anode plate when the separator / cathode plate / separator / anode plate is supplied along the transfer line and the separator / cathode plate / separator / anode plate laminate is wound without performing a punching process to form the electrode assembly,
  • the positive electrode tab and the negative electrode tab are respectively provided at both ends of the longitudinal direction (ie, the direction perpendicular to the direction in which the separator / cathode plate / separator / positive plate stack is continuously supplied and wound).
  • the embodiment provided with the tab and the negative electrode tab also has a similar effect as described above.
  • the tab tape attached to the negative lead terminal and the positive electrode lead terminal should be larger than the negative electrode and positive electrode lead terminals, and as a result, the finished cell is a laminate.
  • the edge cutting part has a result of increasing energy efficiency per unit area of the finished battery.
  • FIG. 1 is a side view schematically showing a secondary battery manufacturing method according to the present invention
  • FIG. 2 is a plan view illustrating a process of forming a negative electrode tab on a negative electrode plate and a process of forming a positive electrode tab on a positive electrode plate shown in FIG.
  • Figure 3 is a front view showing the state of use of the mandrel used in the present invention
  • FIG. 4 is a plan view of the mandrel shown in FIG.
  • FIG. 5 is a plan view of a secondary battery manufactured according to the present invention.
  • FIG. 6 is a cross-sectional view of FIG.
  • FIG. 7 is a view illustrating a process of welding the positive lead terminal and the negative lead terminal to the positive electrode tab and the negative electrode tab of the electrode assembly illustrated in FIG. 5.
  • FIG. 8 is a plan view illustrating a process of forming a negative electrode tab on a negative electrode plate and a process of forming a positive electrode tab on a positive electrode plate in another embodiment of the present invention.
  • FIG. 9 is a view illustrating a process in which the positive electrode tab and the negative electrode tab of the secondary battery manufactured by another embodiment of the present invention are welded with the positive electrode lead and the negative electrode lead without a shift phenomenon due to the thickness of the electrode during winding.
  • FIG. 10 is a perspective view showing a secondary battery manufactured by a first embodiment of a secondary battery according to the present invention.
  • 11 and 12 illustrate a separator, a negative electrode plate, and a positive electrode plate supplied to form an electrode assembly in a second embodiment of the present invention.
  • FIG. 13 is a plan view showing an electrode assembly manufactured by a winding method in a second embodiment of the present invention.
  • FIG. 14 is a plan view illustrating a state in which a positive lead terminal and a negative lead terminal are bonded to a positive electrode tab and a negative electrode tab of the electrode assembly of FIG. 13.
  • 15 and 16 illustrate a separator, a negative electrode plate, and a positive electrode plate supplied to form an electrode assembly in a third embodiment of the present invention.
  • 17 is a plan view showing an electrode assembly manufactured by the winding method in the third embodiment of the present invention.
  • FIG. 18 is a plan view illustrating a state in which edge cutting portions are formed on the positive electrode tab and the negative electrode tab of the electrode assembly illustrated in FIG. 17.
  • FIG. 19 is a plan view illustrating a state in which a positive lead terminal and a negative lead terminal are bonded to a positive electrode tab and a negative electrode tab of the electrode assembly illustrated in FIG. 18, respectively.
  • FIG. 20 is a plan view illustrating a state in which edge cutting parts having different shapes are formed on the positive electrode tab and the negative electrode tab of the electrode assembly illustrated in FIG. 17.
  • FIG. 21 is a plan view illustrating a state in which a positive lead terminal and a negative lead terminal are bonded to a positive electrode tab and a negative electrode tab of the electrode assembly illustrated in FIG. 20, respectively.
  • FIG. 22 is a plan view conceptually showing a state in which a positive lead terminal and a negative lead terminal are bonded to a positive electrode tab and a negative electrode tab of an electrode assembly according to an exemplary embodiment of the present invention
  • FIG. 23 is a plan view illustrating a state in which a protective tape is attached to positive and negative electrode tab portions of the electrode assembly illustrated in FIG. 22.
  • two separators 10 are disposed on the upper and lower sides of the cathode plate 30, and an anode plate 40 is disposed above the upper separator 10 and below the lower separator 10.
  • the separator / positive plate is supplied to the mandrel 20 side along the same transfer line with respect to one end, and the longitudinal direction intersects with the feeding direction of the negative plate 30 and the positive plate 40 which are continuously supplied. Punching one end and / or the other end forms a plurality of negative electrode tabs 32 at a predetermined interval g on the negative electrode plate 30 and a plurality of positive electrode tabs 42 at a predetermined interval g on the positive electrode plate 40.
  • a plurality of negative electrode tabs 32 and positive electrode tabs 42 are laminated on one side by winding the laminate S of the separator / cathode plate / separator / anode plate together by the mandrel 20.
  • FIG. 1 is a side view schematically showing a method for manufacturing a secondary battery according to the present invention
  • FIG. 2 is a plan view illustrating a process of forming a negative electrode tab on a negative electrode plate and a process of forming a positive electrode tab on a positive electrode plate
  • FIG. 4 is a plan view of the mandrel shown in FIG. 3
  • FIG. 5 is a plan view of a secondary battery manufactured by the present invention
  • FIG. 6 is a sectional view of FIG. 5
  • FIG. 5 is a view illustrating a process of welding a positive lead terminal and a negative lead terminal to a positive electrode tab and a negative electrode tab of the electrode assembly shown in FIG.
  • FIG. 8 illustrates a process of forming a negative electrode tab on a negative electrode plate and a positive electrode on a positive electrode plate according to another embodiment of the present invention.
  • 9 is a plan view illustrating a process of forming a tab, and FIG. 9 illustrates a process of welding a positive lead terminal and a negative lead terminal to a positive electrode tab and a negative electrode tab of an electrode assembly of a secondary battery manufactured by another embodiment of the present invention.
  • FIG. 10 is a view illustrating a process in which a positive electrode tab and a negative electrode tab are welded with a positive electrode lead and a negative electrode lead without a gap due to the thickness of the electrode during the electrode assembly winding operation.
  • FIG. 10 is a view illustrating a process in which a positive electrode tab and a negative electrode tab are welded with a positive electrode lead and a negative electrode lead without a gap due to the thickness of the electrode during the electrode assembly winding operation.
  • FIG. 10 is a view illustrating a first embodiment of a secondary battery according to the present invention.
  • the uppermost positive electrode plate 40, the separator 10, the negative electrode plate 30 below the separator 10, and the separator 10 under the negative electrode plate 30 are sequentially arranged from the upper side.
  • each separator 10 and the negative electrode plate 30 and the positive electrode plate 40 may be continuously supplied along the transfer line by a feed guide such as a separate guide roll.
  • the negative electrode plate 30 has a coating surface 31 coated with an electrolyte material (active material) and one side end in a vertical direction (where the vertical direction means a direction orthogonal to the transfer direction of the negative electrode plate 30).
  • the structure is partitioned by an uncoated surface 33 (i.e., an uncoated surface of an electrolyte material (active material)) provided on the surface of the position, and the positive electrode plate 40 also has a coated surface 41 and an uncoated surface 43 ),
  • the longitudinal width of each separator 10 is the coating surface 41 of the positive electrode plate 40 and the coating surface 31 of the negative electrode plate 30. It is comprised larger than the constant length (usually the separator 10 becomes large size about 0.5 mm-4.0 mm compared with the negative electrode plate 30).
  • the uncoated surface 33 of one side end of the negative electrode plate 30 continuously supplied is punched by a punching unit, respectively.
  • Two negative electrode tabs 32 are formed at regular intervals (g) at one end position in the longitudinal direction of the negative electrode plate 30, and the vertical direction of the positive electrode plate 40 continuously supplied (that is, the horizontal direction in which the positive electrode plate 40 is long conveyed).
  • the non-coated surface 43 at one side end is also formed by a punching unit, each of the plurality of positive electrode tabs 42 at a predetermined interval g at a position in one longitudinal end of the positive electrode plate 40. In this case, as shown in FIG.
  • the negative electrode tab 32 of the negative electrode plate 30 and the positive electrode tab 42 of the positive electrode plate 40 are arranged so as to be arranged at positions shifted from each other with respect to the vertical direction crossing the horizontal conveyance direction. Punching one side of the negative electrode plate 30 and one side of the positive electrode plate 40 by the punching unit. Thus, when forming the electrode assembly 50 to be described later, the negative electrode tab 32 and the positive electrode tab 42 can be formed side by side without overlapping.
  • the folding line fl shown in FIG. 2 means a line that is folded when forming the electrode assembly 50 through a process of winding the stack S to be described later (winding process).
  • the laminate S of the separator / cathode plate / separator / anode plate is wound by the mandrel 20 to form an electrode assembly 50 having the positive electrode tab 42 and the negative electrode tab 32 laminated on one side thereof.
  • the electrode assembly 50 having a structure in which a plurality of layers of the positive electrode plate 40 and the negative electrode plate 30 are stacked between the separators 10 of the plurality of layers, and the positive electrode tab 42 and the negative electrode tab 32 are provided on one side thereof. ) Can be formed.
  • the mandrel 20 is separated from the electrode assembly 50 and drawn out to the outside in the conveying direction, and the electrode assembly 50 is continuously conveyed along the conveying line by the holding unit.
  • the laminate S of the separator / cathode plate / separator / anode plate is connected to the electrode assembly 50.
  • the mandrel 20 enters the portion leading to the electrode assembly 50 formed as described above, and the separator / cathode plate / separator / anode plate is gripped and cut by a cutting unit such as a cutter disposed at the next end of the mandrel 20.
  • the individual electrode assembly 50 is produced by cutting the separator / cathode plate / separator / anode plate of the laminate S that is connected to the electrode assembly 50.
  • a plurality of layers of the positive electrode plate 40 and the negative electrode plate 30 are laminated between the plurality of separators 10, and one side of the positive electrode tab 42 and the negative electrode tab 32 are provided. It is possible to manufacture a large number of electrode assembly 50 of the structure.
  • the mandrel employed in the present invention includes a pair of forward and backward mandrel members and a holding member protruding from opposite surfaces of the mandrel member. As shown in FIG. 3, a pair of mandrel members While retreating, the mandrel itself rotates together to wind the laminate S while the pair of mandrel members are advanced and gripped by the respective holding members, thereby winding the laminate S. ).
  • the positive electrode tab 42 and the negative electrode tab 32 of the electrode assembly 50 are welded to the tabs 32 and 42, respectively, and then the tab 32. Trimming the ends of the 42, to match the end length of each tab (32, 42) equally.
  • the positive electrode lead terminal 44 and the negative electrode lead terminal 34 are welded to the positive electrode tab 42 and the negative electrode tab 32, respectively.
  • a conventional apparatus such as an ultrasonic welding machine can be used.
  • the electrode assembly 50 in which the positive lead terminal 44 and the negative lead terminal 34 are fused to the positive electrode tab 42 and the negative electrode tab 32 is sealed by the pouch 90.
  • the fusion tab tape 70 is first attached to the positive lead terminal 44 and the negative lead terminal 34, and then the electrode assembly 50 is sealed by the pouch 90.
  • the electrode assembly 50 is inserted into the pouch 90 to cover both sides of the electrode assembly 50, and the upper and lower circumferences and the left and right circumferences of the upper, lower, left, and right circumferences of the pouch 90.
  • the right peripheral portion is first fusion-bonded by hot sealing.
  • the left or right circumference of the pouch 90 is sealed while the portion of the upper circumference of the pouch 90 that faces the positive lead terminal 44 and the negative lead terminal 34 is previously attached to the tab tape 70. It is possible to seal sealingly in such a way that the positive lead terminal 44 and the negative lead terminal 34 are integrally fused with each other. That is, since the pouch 90 can be more fusion-bonded to the positive lead terminal 44 and the negative lead terminal 34 through the tab tape 70, the positive and negative lead terminals 34 and the pouch 90 can be welded together more firmly. It is possible to further improve the sealing property between).
  • one of the periphery of the entire peripheral portion of the pouch 90 which is a part constituting the secondary battery of the present invention, injects the electrolyte solution in a state in which an open portion is formed without sealing, and then charge and discharge the secondary battery, After the gas inside the battery is removed, the excess pouch 90 is cut off, and the remaining portion of the pouch 90 is sealed.
  • gas is generated to fill the inside of the pouch 90, and the pouch 90 swells due to this. When gas is collected into a free space inside the pouch 90, the gas is then After removing the internal gas through the degassing operation and cutting the excess pouch 90, the remaining opening of the pouch 90 may be sealed by hot sealing or the like.
  • the junction portion of the positive electrode tab 42 and the positive lead terminal 44 and the junction of the negative electrode tab 32 and the negative lead terminal 34 before the pouch 90 is fusion-bonded.
  • a separate protective tape 80 is further attached to cover the portion, and then the pouch 90 is welded to seal the electrode assembly 50.
  • burrs may occur in the edge cutting unit 57, and an uncoated surface ( The burrs are also generated in the welded portion W (shown in FIG. 22) by welding of the tabs 33 and 43, the tabs 32 and 42, and the lead terminals 34 and 44, and such burrs are made of aluminum in the pouch 90.
  • the occurrence of short or corrosion caused by the interaction with the layer is caused, it is possible to prevent the occurrence of such short or corrosion by the protective tape (80).
  • Corrosion of the pouch 90 with the aluminum layer is caused by corrosion when placed at the same potential as the tab of the cathode potential.
  • the above-described protective tape 80 by further attaching the above-described protective tape 80, it is possible to prevent the occurrence of short circuit or corrosion, thereby obtaining the effect of improving the reliability of the battery and the like.
  • each punching groove formed by punching one side of the negative electrode plate 30 and one side of the positive electrode plate 40 has a rectangular groove shape, and thus, the negative electrode tab 32 and the positive electrode plate ( 40 shows that the positive electrode tab 42 has a rectangular terminal shape, and the negative electrode tab 32 and the positive electrode tab 42 may be formed in a rhombus shape.
  • the negative electrode tab 32 and the positive electrode tab 42 may be formed in various shapes according to various conditions.
  • FIGS. 8 and 9 are views showing another embodiment of the present invention, the present invention according to FIGS. 8 and 9 is a gap (g) of the punching groove formed on one side of the negative electrode plate 30 and one side of the positive electrode plate 40. Gradually widen along the conveying direction so that the distance between the negative electrode tab 32 and the positive electrode tab 42 is gradually increased, and then the laminate S of the separator / cathode plate / separator / anode plate is wound to one side. A plurality of negative electrode tabs 32 and positive electrode tabs 42 are formed on the electrode assembly 50.
  • the distance g of the punching grooves formed on one side of the negative electrode plate 30 and one side of the positive electrode plate 40 is transferred in the conveying direction.
  • the distance between the negative electrode tab 32 and the positive electrode tab 42 may be gradually increased. Therefore, by adjusting the feed rate, the position of the tabs 32 and 42 can be compensated for by the thickness of the negative / positive electrode and the separator during winding.
  • the thickness of the electrode assembly 50 gradually increases, and as the thickness of the electrode assembly 50 gradually increases,
  • the positive electrode tabs 42 and the negative electrode tabs 32 are stacked side by side, and the individual positive electrode tabs 42 and the negative electrode plate 30 of the positive electrode plate 40 are made before the electrode assembly 50 is formed by this winding operation.
  • the gap between the individual negative electrode tabs 32 of each of the negative electrode tabs 32 is gradually adjusted to be widened in advance so that the individual positive electrode tabs 42 and the individual negative electrode tabs 32 are stacked side by side with each other by the thickness of the electrode. Can be prevented. That is, the positive electrode tab 42 and the negative electrode tab 32 may be stacked in a straight line without being shifted laterally.
  • FIG. 8 illustrates a distance g between each of the positive electrode tab 42 and the negative electrode tab 32 of the positive electrode plate 40 and the negative electrode plate 30 in consideration of the thickness of the electrode assembly 50 before the laminate S winding operation.
  • Figure 9 is a positive electrode tab 42 and the negative electrode tab 32 when the electrode assembly 50 is formed by the stack (S) winding operation, The figure shows that the laminated sheets are arranged in a line without being misaligned with each other.
  • the separator 10 is provided between the negative electrode plate 30 having the plurality of negative electrode tabs 32 at one side end position in the longitudinal direction and the positive electrode plate 40 having the plurality of positive electrode tabs 42 at one side end position in the longitudinal direction.
  • the electrode assembly 50 formed in a shape wound through a winding operation, and provided at one end of the electrode assembly 50 in the longitudinal direction, so that the positive lead terminal 44 and the negative lead terminal 34 are disposed.
  • Each of the negative electrode tabs 32 and the positive electrode tabs 42 are to be bonded to each other, and the electrode assembly 50 may be configured by sealing the pouch 90.
  • Pouch 90 is firmly fused to the positive lead terminal 44 and the negative lead terminal 34 via a tab tape 70. As illustrated in FIG. 23, the pouch 90 is fusion bonded.
  • the protective tape 80 is further attached to cover the junction portion of the positive electrode tab 42 and the positive lead terminal 44 and the junction portion of the negative electrode tab 32 and the negative lead terminal 34. The occurrence and corrosion can be prevented more reliably as described above.
  • FIGS. 11 to 14 show another embodiment of the present invention, in which the present invention shown in FIGS. 11 to 14 positions the uncoated surface 43 of the positive electrode plate 40 and the uncoated surface 33 of the negative electrode plate 30.
  • the positive electrode tab 42 and the negative electrode tab 32 are made, and the laminate S of the positive electrode plate / separator / cathode plate / separator 10 is supplied to the mandrel 20 and wound, thereby winding the positive electrode tab 42 at both ends in the longitudinal direction.
  • the negative electrode tab 32 may be provided with a secondary battery. Since the rest of the process is the same as the above embodiment, duplicate description thereof will be omitted.
  • FIG. 15 to 19 show another embodiment of the present invention, according to the present invention shown in Figs. 15 to 19, the lamination of the positive electrode plate / separator / cathode plate / separator 10 without performing the punching processing operation.
  • the sieve S By supplying the sieve S to the mandrel 20 and winding it, it is possible to make a secondary battery each having the positive electrode tab 42 and the negative electrode tab 32 at both ends in the longitudinal direction. That is, the longitudinal width of the separator 10 is wound (wound) the laminate S in a state in which the longitudinal width of the separator plate 31 of the positive electrode plate 40 and the negative electrode plate 30 is increased by a certain size.
  • secondary batteries each having the positive electrode tab 42 and the negative electrode tab 32 provided at both ends in the vertical direction are manufactured.
  • edge cut portion 57 may be configured in the shape of a square groove, as shown in Figure 18, may be configured in an inclined form as shown in Figure 20, may be configured in a variety of other forms. Of course.
  • all the above embodiments basically form the electrode assembly 50 which is the main body of the secondary battery by a winding method, and the electrode assembly 50 is provided with a positive electrode tab 42 and a negative electrode tab 32
  • the positive electrode tab 42 and the negative electrode tab 32 are bonded to the positive lead terminal 44 and the negative lead terminal 34 to manufacture a secondary battery having a structure sealed with a pouch 90.
  • it can be configured to have the configuration of the 70 and the protective tape 80.
  • the present invention is to provide a secondary battery manufacturing method and a secondary battery, the main object is to simplify the manufacturing process, high-speed mass production is advantageous, and can be expected to improve the safety of the battery and improved battery performance, in particular,
  • the present invention relates to a secondary battery manufacturing method and a secondary battery capable of high-rate charging and discharging using a multi-tap portion of a pole plate, and may be used as a useful technique in the art.

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  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Secondary Cells (AREA)

Abstract

La présente invention concerne un procédé de fabrication d’un accumulateur, comportant les étapes consistant à : disposer deux feuilles de séparateurs (10) au-dessus et au-dessous d’une plaque (30) d’électrode négative, disposer une plaque (40) d’électrode positive au-dessus du séparateur supérieur (10) ou au-dessous du séparateur inférieur (10) et amener sous forme allongée chaque extrémité des séparateurs (10), de la plaque (30) d’électrode négative et de la plaque (40) d’électrode positive à un mandrin (20) le long de la même ligne de transfert ; poinçonner chaque extrémité verticale et / ou l’autre extrémité de la plaque (30) d’électrode négative et de la plaque (40) d’électrode positive croisant la direction de transfert de la plaque (30) d’électrode négative et de la plaque (40) d’électrode positive amenées en continu, pour former une pluralité de languettes (32) d’électrode négative sur la plaque (30) d’électrode négative avec un écartement prédéterminé (g) et former une pluralité de languettes (42) d’électrode positive sur la plaque (40) d’électrode positive avec un écartement prédéterminé (g) ; enrouler le corps stratifié (S) séparateur / plaque d’électrode négative / séparateur / plaque d’électrode positive conjointement au moyen du mandrin (20) pour produire un ensemble (50) d’électrode présentant une face sur laquelle la pluralité de languettes (32) d’électrode négative et les languettes (42) d’électrode positive sont superposées ; séparer le mandrin (20) de l’ensemble (50) d’électrode et transférer l’ensemble (50) d’électrode au moyen d’une unité de préhension ; et découper l’assemblage séparateur / plaque d’électrode négative / séparateur / plaque d’électrode positive relié à l’ensemble (50) d’électrode à l’aide d’une unité de découpe. La présente invention empêche les languettes (42) d’électrode positive et les languettes (32) d’électrode négative superposées en couches d’être déviées latéralement par l’épaisseur de l’électrode lorsque les vitesses de transfert des languettes (42) d’électrode positive et des languettes (32) d’électrode négative sont régulées et que le corps stratifié (S) est enroulé pour former l’ensemble (50) d’électrode.
PCT/KR2009/006040 2008-11-27 2009-10-20 Procédé de fabrication d’un accumulateur et accumulateur WO2010062037A2 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US13/131,325 US20110244287A1 (en) 2008-11-27 2009-10-20 Method for manufacturing secondary cell and secondary cell
CN200980147452XA CN102272998A (zh) 2008-11-27 2009-10-20 二次电池的制造方法及二次电池
JP2011538542A JP2012513076A (ja) 2008-11-27 2009-10-20 二次電池の製造方法及び二次電池
US14/196,020 US20140186671A1 (en) 2008-11-27 2014-03-04 Secondary cell
US14/195,980 US20140182118A1 (en) 2008-11-27 2014-03-04 Method for manufacturing secondary cell and secondary cell

Applications Claiming Priority (4)

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KR20080118753 2008-11-27
KR10-2008-0118753 2008-11-27
KR1020090087164A KR101108118B1 (ko) 2008-11-27 2009-09-15 이차전지 제조방법 및 이차전지
KR10-2009-0087164 2009-09-15

Related Child Applications (3)

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US13/131,325 A-371-Of-International US20110244287A1 (en) 2008-11-27 2009-10-20 Method for manufacturing secondary cell and secondary cell
US14/195,980 Division US20140182118A1 (en) 2008-11-27 2014-03-04 Method for manufacturing secondary cell and secondary cell
US14/196,020 Division US20140186671A1 (en) 2008-11-27 2014-03-04 Secondary cell

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WO2010062037A2 true WO2010062037A2 (fr) 2010-06-03
WO2010062037A3 WO2010062037A3 (fr) 2010-08-19

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102487150A (zh) * 2010-12-03 2012-06-06 比亚迪股份有限公司 电池电芯的卷绕方法及装置
CN111525057A (zh) * 2020-03-20 2020-08-11 天津力神电池股份有限公司 一种圆型软包聚合物锂离子电池及装配方法
CN112166519A (zh) * 2019-01-02 2021-01-01 株式会社Lg化学 用于制造具有多个接线片的圆柱形电池的方法和使用该方法制造的圆柱形电池
CN113708010A (zh) * 2021-09-01 2021-11-26 东莞新能安科技有限公司 电化学装置和电子装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5478668A (en) * 1993-11-30 1995-12-26 Bell Communications Research Inc. Rechargeable lithium battery construction
KR20000066307A (ko) * 1999-04-15 2000-11-15 김순택 리튬 이온 폴리머 전지 및 그 제조방법
KR20060085440A (ko) * 2005-01-24 2006-07-27 삼성에스디아이 주식회사 이차 전지용 전극판 권취장치
KR20060111835A (ko) * 2005-04-25 2006-10-30 삼성에스디아이 주식회사 이차 전지용 권취장치

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5478668A (en) * 1993-11-30 1995-12-26 Bell Communications Research Inc. Rechargeable lithium battery construction
KR20000066307A (ko) * 1999-04-15 2000-11-15 김순택 리튬 이온 폴리머 전지 및 그 제조방법
KR20060085440A (ko) * 2005-01-24 2006-07-27 삼성에스디아이 주식회사 이차 전지용 전극판 권취장치
KR20060111835A (ko) * 2005-04-25 2006-10-30 삼성에스디아이 주식회사 이차 전지용 권취장치

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102487150A (zh) * 2010-12-03 2012-06-06 比亚迪股份有限公司 电池电芯的卷绕方法及装置
CN112166519A (zh) * 2019-01-02 2021-01-01 株式会社Lg化学 用于制造具有多个接线片的圆柱形电池的方法和使用该方法制造的圆柱形电池
EP3783714A4 (fr) * 2019-01-02 2021-07-21 Lg Chem, Ltd. Procédé de fabrication d'une batterie cylindrique dotée de multiples languettes, et batterie cylindrique fabriquée selon ledit procédé
US11641047B2 (en) 2019-01-02 2023-05-02 Lg Energy Solution, Ltd. Method for manufacturing cylindrical battery having multiple tabs and cylindrical battery manufactured using the same
CN112166519B (zh) * 2019-01-02 2024-06-04 株式会社Lg新能源 用于制造具有多个接线片的圆柱形电池的方法和使用该方法制造的圆柱形电池
CN111525057A (zh) * 2020-03-20 2020-08-11 天津力神电池股份有限公司 一种圆型软包聚合物锂离子电池及装配方法
CN111525057B (zh) * 2020-03-20 2022-09-06 天津力神电池股份有限公司 一种圆型软包聚合物锂离子电池及装配方法
CN113708010A (zh) * 2021-09-01 2021-11-26 东莞新能安科技有限公司 电化学装置和电子装置

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