WO2016072618A1 - Coin type secondary battery having anode plate welding structure - Google Patents

Coin type secondary battery having anode plate welding structure Download PDF

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Publication number
WO2016072618A1
WO2016072618A1 PCT/KR2015/010152 KR2015010152W WO2016072618A1 WO 2016072618 A1 WO2016072618 A1 WO 2016072618A1 KR 2015010152 W KR2015010152 W KR 2015010152W WO 2016072618 A1 WO2016072618 A1 WO 2016072618A1
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WO
WIPO (PCT)
Prior art keywords
plate
cap
negative electrode
secondary battery
type secondary
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Application number
PCT/KR2015/010152
Other languages
French (fr)
Korean (ko)
Inventor
홍지준
김인중
정영호
Original Assignee
주식회사 루트제이드
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Publication of WO2016072618A1 publication Critical patent/WO2016072618A1/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
    • 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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0422—Cells or battery with cylindrical casing
    • H01M10/0427—Button 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/109—Primary casings; Jackets or wrappings characterised by their shape or physical structure of button or coin shape
    • 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
    • H01M50/147—Lids or covers
    • H01M50/148—Lids or covers characterised by their shape
    • H01M50/153—Lids or covers characterised by their shape for button or coin cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/105—Pouches or flexible bags
    • 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
    • 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 invention relates to a coin-type secondary battery having a negative electrode plate welding structure. Specifically, a negative electrode welding structure configured to easily perform electrical bonding or connection between a can accommodating an electrode body of a secondary battery and a negative electrode plate of an electrode body. It relates to a coin-type secondary battery having a.
  • the coin-type secondary battery 1 includes an electrode body 10 in which a plurality of positive electrode plates 11 and negative electrode plates 12 are alternately stacked, and seals the electrode body 10. It may be configured as an exterior case 20.
  • the exterior case 20 may include a can 21 accommodating the electrode body 10 and a cap 22 that blocks or covers an open upper portion of the can 21.
  • the negative electrode plates 12 may be disposed at upper and lower ends of the electrode body 10 to stably occlude cations emitted from the positive electrode plate 11.
  • the coin-type secondary battery 1 configured as described above may perform its function only when the positive electrode plate 11 and the negative electrode plate 12 of the electrode body 10 are electrically connected to the exterior case 20.
  • the operation of connecting the positive electrode lead 11a protruding from the positive electrode plate 11 and the bottom surface of the can 21 should be performed, and ultrasonic welding or the like as the operation method. Welding method or ultrasonic welding method may be used.
  • the anode lead 11a of the positive electrode plate 11 is opened on the bottom surface of the can 21 through the open upper portion of the can 21. It can be bonded by ultrasonic welding or ultrasonic welding method. At this time, the positive electrode leads 11a of the plurality of stacked positive electrode plates 11 are gathered together to weld the inner bottom of the can 21 to electrically connect the positive electrode plate 11 and the can 21 to each other.
  • the welding electrode or the welding electrode joins the positive electrode lead 11a of the positive electrode plate 11 to the bottom surface of the can 21, the welding electrode or the welding electrode passes through the open upper portion of the can 21. 21 could be inserted into the inner space.
  • the welding electrode or the welding electrode joins the negative electrode lead 12a of the negative electrode plate 12 with the bottom surface of the cap 22, the open upper portion of the can 21 is opened by the cap 22. This is because it cannot be inserted into the can 21 because it is blocked or covered.
  • the welding electrode or the welding electrode is inserted into the inner space of the can 21 when the anode lead 11a of the anode plate 11 is joined to the bottom surface of the can 21.
  • the positive electrode lead 11a of the can and the bottom surface of the can 21 can be pressed in the vertical direction, but the positive electrode lead 11a of the positive electrode plate 11 is electrically connected to the bottom surface of the can 21 by welding or the like.
  • the negative electrode lead 12a of the negative electrode plate 12 is bonded to the bottom of the cap 22 in the bonded state, the negative electrode lead 12a of the negative electrode plate 12 and the bottom of the cap 22 are perpendicular to each other. It cannot be pressed in the direction.
  • the bottom surface of the cap 22 is simply brought into simple contact with the negative electrode plate 12 disposed at the top of the electrode body 10. Method was used.
  • the simple contact method as described above causes a phenomenon in which contact resistance is increased between the negative electrode plate 12 and the bottom surface of the cap 22, thereby providing a problem in that the performance of the coin-type secondary battery is degraded.
  • the present invention has been made to solve the above problems, and electrically conductive to the cap by welding or welding a conductor that is raised to the uppermost negative electrode plate of the bottom surface of the cap not coupled to the can and the negative electrode plate of the electrode body accommodated in the can.
  • the cap When the cap is coupled to the can, the cap may be deformed in the same horizontal position as the negative electrode plate to provide a conductor that can be accommodated in the can.
  • a plurality of positive electrode plate and the negative electrode plate are alternately stacked, the upper and lower electrode body each disposed with the negative electrode plate;
  • a can accommodating the electrode body and the electrolyte and having an open top;
  • a cap coupled to an upper end of the can to block an open top of the can;
  • the conductor may include a first joining piece bonded to a negative electrode plate disposed on an upper end of the electrode body; A plate placed on an upper portion of a negative electrode plate disposed on an upper end of the electrode body in a state of being connected to the first joining piece, and being pivotable to an open upper portion of the can; An incision formed in the plate; And a second joining piece disposed in a region formed by the cutout and protruding or pivoting on a plate pivoting to an open top of the can to be joined to a bottom surface of the cap.
  • the cutout may be formed by continuously rotating in the circumferential direction of the plate.
  • the second joining piece may protrude helically on the plate to be electrically joined or connected to the bottom surface of the cap.
  • the second bonding piece may protrude on the plate toward a direction opposite to the center of the can with respect to the center of the can.
  • the cutout may be formed in any one of a c shape or an arc shape on the plate.
  • the second joining piece may protrude on the plate while being pivoted in a space formed by the cutout to be electrically connected to or connected to a bottom surface of the cap.
  • the direction in which the second joining piece is pivoted in the space formed by the cutout and the direction of protruding from the plate with respect to the center of the can may vary depending on the formation position of the cutout and the arrangement direction of the cap. have.
  • the top and bottom surfaces of the second joining piece may contact the bottom surface of the cap and the top surface of the negative electrode plate disposed on the top of the electrode body, respectively.
  • the negative electrode plate of the electrode body accommodated in the can and the cap blocking the open top of the can can be connected by welding or welding by a conductor, the contact resistance generated between the cap and the negative electrode plate is prevented. There is an effect of extending the life of the battery.
  • the present invention has an effect that the work method of electrically connecting the conductor with the negative electrode plate and the cap of the electrode body by welding or welding method is easy, thereby improving the work efficiency of the operator and increasing the productivity of the secondary battery.
  • the conductor that connects the negative electrode plate and the cap of the electrode body by welding or welding method is deformed into a plate shape having a plane so as to have the same shape as the stacked negative plate when the cap is coupled to the can inside the can Since it can be accommodated in, the remaining space is not formed inside the can has the effect of maintaining the energy density per volume.
  • FIG. 1 is a cross-sectional view of a coin-type secondary battery according to the prior art.
  • FIG. 2 is a cross-sectional view of a coin-type secondary battery having a negative electrode plate welding structure according to an embodiment of the present invention.
  • FIG. 3 is a cross-sectional view illustrating a state in which a first bonding piece of a conductor is bonded to a negative electrode plate by a welding terminal or a welding terminal in the secondary battery of FIG. 2.
  • FIG. 4 is a perspective view of the conductor according to FIG. 2;
  • FIG. 5 is a perspective view illustrating a state in which the second bonding piece protrudes from a plate in the conductor shown in FIG. 4.
  • FIG. 6 is a cross-sectional view showing a state in which the second bonding piece of the conductor according to FIG. 4 is bonded to the bottom of the cap.
  • FIG. 7 is a perspective view of a conductor according to another embodiment of the present invention.
  • FIG. 8 is a perspective view illustrating a state in which the second bonding piece protrudes from a plate in the conductor shown in FIG. 7.
  • FIG. 8 is a perspective view illustrating a state in which the second bonding piece protrudes from a plate in the conductor shown in FIG. 7.
  • FIG. 9 is a cross-sectional view illustrating a state in which the second bonding piece of the conductor illustrated in FIG. 7 is bonded to the bottom surface of the cap.
  • FIG. 10 is a plan view showing a state in which the bonding piece of the conductor according to another embodiment of the present invention is rotated forward or backward to protrude on the plate.
  • the coin-type secondary battery 100 having a negative electrode terminal welding structure according to an embodiment of the present invention
  • a plurality of positive electrode plate 111 and the negative electrode plate 113 are alternately stacked cap
  • an electrode body 110 in which the negative electrode plate 113 is disposed and a can receiving the electrode body 110 and the electrolyte and having an open top ( 120 and a cap 130 coupled to an upper end of the can 120 to block an open upper portion of the can 120 and accommodated in the can 120 with an upper portion of the can 120 opened.
  • the cathode plate 113 and the cap 130 of the electrode body 110 are electrically connected to each other.
  • the electrode 130 may be disposed at the upper end of the electrode body 110.
  • a conductor 140 that is deformed into the same flat shape as the disposed negative electrode plate 113.
  • the plurality of positive electrode plates 111 and the negative electrode plates 113 constituting the electrode body 110 may have a shape or size that can be accommodated in the can 120 and have a substantially circular, elliptical or track shape. .
  • the positive lead 111a and the negative lead 113b may protrude from the plurality of positive electrode plates 111 and the negative electrode plates 113, respectively.
  • Each of the plurality of positive electrode leads 111a formed on the plurality of positive electrode plates 111 may be electrically connected to the bottom surface of the can 120 by welding or welding, as described in the description of the background of the present disclosure. Can be bonded.
  • the plurality of negative electrode leads 113a formed in the plurality of negative electrode plates 113 may protrude toward the upper side of the can 120.
  • the can 120 may have a cylindrical shape with an open top, and may serve as a positive electrode terminal of the electrode body 110.
  • the cap 130 may be coupled to an upper end of the can 120 to block an open upper portion of the can 120, and serve as a negative terminal of the electrode body 110.
  • the conductor 140 is interposed between the negative electrode plate 113 disposed at the top of the electrode body 110 and the cap 130 to electrically connect the cap 130 and the negative electrode plate 113. Can be bonded. To this end, the conductor 140 may be bonded to the cap 130 by welding or welding.
  • the conductor 140 may be made of copper metal or nickel metal having excellent conductivity, and as shown in FIG. 4, a first electrode bonded to the negative electrode plate 113 disposed at the top of the electrode body 110.
  • Bonding piece 141 A plate 143 disposed on an upper portion of the negative electrode plate 113 disposed on an upper end of the electrode body 110 in a state of being connected to the first bonding piece 141, and pivotable to an open upper portion of the can 120; An incision 145 formed in the plate 143; And a second joining piece disposed in an area formed by the cutout 145 and protruding or pivoting on a plate 143 pivoting to an open upper portion of the can 120 to be joined to a bottom surface of the cap 130. 147).
  • the first joining piece 141 is connected to a welding terminal or a welding terminal in a state of being in contact with the negative electrode lead 113a of the negative electrode plate 113 disposed on the upper end of the electrode body 110.
  • the cathode lead 113a may be electrically bonded to each other by a welding method or a welding method.
  • the upper portion of the can 120 may be opened so that the welding terminal or the welding terminal may be inserted into the inner space of the can 120. Should be.
  • the plate 143 may be placed on an upper surface of the negative electrode plate 113 disposed at the top of the electrode body 110.
  • the plate 143 is preferably the same as the size and shape of the positive electrode plate 111 or the negative electrode plate 113, but is not limited thereto. That is, if the size that can be included in the area formed by the positive electrode plate 112 or the negative electrode plate 113 and the upper and lower surfaces thereof have parallel horizontal planes, they may be manufactured in various shapes.
  • the plate 143 may be pivoted on the first bonding piece 141 bonded to the cathode lead 113a to be exposed to the open top of the can 120.
  • the cutout 145 may be formed by continuously rotating along the circumferential direction of the plate 143 as shown in FIG. 4. That is, the cutout 145 may be formed in a spiral shape toward the center of the plate 143 at one side edge of the plate 143.
  • the cutout 145 may be formed to have a slit shape in the conductor 140 as well as to have a predetermined width or a gap. When the cutout 145 is formed in a slit shape, only a cut line is formed on the conductor 145. However, when the cutout 145 is formed to have a predetermined width or a gap, a portion corresponding to the width or the gap of the cutout 145 is formed. It may be in the form without a conductor 145.
  • the second bonding piece 147 may be formed on the plate 143 as the cutout 145 is formed. That is, the second joining piece 147 is a portion where the cutout 145 is not formed on the plate 143, and may protrude in a spiral shape on the plate 145 as shown in FIG. 5. have.
  • the second bonding piece 147 has the cap 130 with the plate 143 placed on the negative electrode plate 113 of the electrode body 110 turned toward the cap 130. ) May protrude in the direction in which it is disposed.
  • the plate 143 is preferably erected at an angle of at least 90 degrees to stand.
  • the plate 143 is pivoted at an angle of less than 90 degrees, the operator should join the second joining piece 147 and the cap 130 with the welding terminal or the welding terminal tilted, and thus In an uncomfortable welding or welding operation posture, the second joining piece 147 and the cap 130 may be incorrectly joined.
  • the second joining piece 147 protrudes from the plate 143 toward the opposite direction of the center of the can 120 based on the center of the can 120.
  • the second bonding piece 147 is preferably formed to protrude in the direction from the bottom of the can 120 toward the top.
  • the cap 130 joined to the second joining piece 147 may be attached to the can ( It should be disposed on the upper side of the 120, in this state, one end in the longitudinal direction of the cap 130 is interfered with the electrode body 110 accommodated in the can 120, the operator is the second bonding piece 147 This is because the joining operation of the cap 130 and the cap 130 cannot be easily performed.
  • the second bonding piece in a state where the cap 130 is disposed outside the can 120 without completely coupling the cap 130 and the can 120.
  • the operator can easily perform the joining operation of the second joining piece 147 and the cap 130.
  • the second joining piece 147 having a spiral shape protruding toward the cap 130 may have an upper end contacting the center of the bottom surface of the cap 130. In this state, the second joining piece 147 may be a welding terminal or a welding terminal. The bonding piece 147 and the cap 130 may be sequentially pressed to allow the second bonding piece 147 to bond the cap 130 to each other.
  • the second bonding piece 147 is the bottom surface of the cap 130. 2
  • the upper surface and the lower surface of the conductor 140 may be accommodated on the plate 143 to have the same plane as the plate 143, as shown in FIG. 2.
  • the lower surface of the 130 and the upper surface of the negative electrode plate 113 disposed on the upper end of the electrode body 110 may be in contact with each other. Therefore, no residual space remains inside the can 120.
  • the cutout 145 is formed in the plate 143 in a spiral shape, and accordingly, the second joining piece 147 is formed in a spiral shape and protrudes from the plate 143. It has been described as, but not limited to.
  • a cutout 145 ' having a C shape or an arc shape may be formed in the plate 143, and thus, the second joining piece 147' is formed in a space formed by the cutout 145 '. This can be arranged.
  • the second bonding piece 147 ′ is disposed in a space formed by the cutout 145 ′, and the plate 143 placed on the negative electrode plate 113 pivots through an open upper portion of the can 110. 8 and 9, the cutting unit 145 may pivot in the space formed by the cutout 145 ′ to protrude on the plate 143.
  • the second joining piece 147 ′ pivoted on the plate 143 is welded or welded to the bottom surface of the cap 130 that is not coupled to the top of the can 120. Can be bonded.
  • the angle at which the second joining piece 147 'is pivoted on the plate 143 is preferably at least 90 degrees. This is because, in the process of the worker joining the second joining piece 147 'and the cap 130 with a welding terminal or a welding terminal, the second joining piece ( 147 'and the bottom surface of the cap 130 must be sequentially pressed so that the second joining piece 147' and the cap 130 can be accurately bonded.
  • the second joining piece 147 ' is pivoted at an angle of less than 90 degrees, the operator is inclined to the welding terminal or the welding terminal, and the bottom surface of the second joining piece 147' and the cap 130 is inclined. Therefore, the welding or welding work posture of the operator is inconvenient, and thus the bottom surface of the second joining piece 147 ′ and the cap 130 may be incorrectly joined.
  • the direction in which the second joining piece 147 'is pivoted in the space formed by the cutout 145' and the direction in which the second joining piece 147 'protrudes on the plate 143 based on the center of the can 110 are: It may be variously selected according to the formation position of the cutout 145 ′, and may also be variously selected according to the arrangement direction of the cap 130.
  • the second bonding piece 147 ′ may be pivoted upward on the plate 143 pivoted to the open upper portion of the can 120 to protrude in an outward direction of the can 120.
  • the plate 143 may be pivoted upward or downward on the plate 143 pivoted to the open top of the can 120, as shown in FIG. 10. It can be pivoted forward or backward in the phase.
  • the direction in which the second bonding piece 147 ′ protrudes from the plate 143 based on the center of the can 120 may also protrude in the center of the can 120 or in a direction opposite to the center thereof.
  • the second joining piece 147 ′ may protrude in the direction opposite to the center of the can 120 on the plate 143.
  • the second joining piece 147 ′ is formed on the bottom surface of the cap 130. While being pressurized, as shown in FIG. 2, the cutout 145 ′ may be accommodated into a space defined by the cutout 145 ′ to have the same plane as the plate 143.
  • the negative electrode plate 113 and the cap 130 of the electrode body 110 accommodated in the can 120 through the conductor 140 by a welding or welding method rather than a simple contact method. It can be electrically connected to each other.
  • the conductor 140 is welded or welded to each of the negative electrode plate 113 and the cap 130 of the electrode body 110. Since the operation method of joining in the manner is easy, the work efficiency of the operator is improved, there is an effect that the productivity of the secondary battery is increased.
  • the conductor 140 since the conductor 140 is deformed into a plate shape having a plane when the cap 130 is coupled to the can 120, the conductor 140 may be accommodated inside the can 120. Since no residual space is formed inside the can 120, there is an effect of maintaining energy density per volume.
  • the present invention can be applied to a variety of electronic devices such as smartphones, cameras, notebooks, and can be sold to consumers or sold separately along with the electronic devices.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Secondary Cells (AREA)

Abstract

The present invention relates to a coin type secondary battery having an anode plate welding structure and, more particularly, to a coin type secondary battery formed to easily join a can accommodating an electrode body of the secondary battery and an anode plate of the electrode body, and can comprise: an electrode body in which a plurality of cathode plates and anode plates are alternately stacked wherein the anode plates are disposed respectively at the upper end and the lower end thereof; a can accommodating the electrode body and an electrolyte and having an open upper portion; a cap coupled to the upper end of the can so as to close the open upper portion of the can; and a conductor electrically connecting the electrode body, which is accommodated in the can, and the cap in a state in which the upper portion of the can is open, and changed so as to have the same horizontal posture as that of the anode plate disposed at the upper end of the electrode body when the upper portion of the can is covered or blocked by the cap.

Description

음극판 용접 구조를 갖는 코인형 이차전지Coin-Type Secondary Battery with Negative Plate Welding Structure
본 발명은 음극판 용접 구조를 갖는 코인형 이차전지에 관한 것으로서, 구체적으로는, 이차전지의 전극체를 수용하는 캔과 전극체의 음극판 간의 전기적 접합 또는 접속을 용이하게 실시할 수 있도록 구성된 음극판 용접 구조를 갖는 코인형 이차전지에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coin-type secondary battery having a negative electrode plate welding structure. Specifically, a negative electrode welding structure configured to easily perform electrical bonding or connection between a can accommodating an electrode body of a secondary battery and a negative electrode plate of an electrode body. It relates to a coin-type secondary battery having a.
일반적으로 도 1에 도시된 바와 같이, 코인형 이차전지(1)는 복수개의 양극판(11)과 음극판(12)이 교대로 적층된 전극체(10)와, 상기 전극체(10)를 밀봉하는 외장 케이스(20)로 구성될 수 있다.In general, as shown in FIG. 1, the coin-type secondary battery 1 includes an electrode body 10 in which a plurality of positive electrode plates 11 and negative electrode plates 12 are alternately stacked, and seals the electrode body 10. It may be configured as an exterior case 20.
또한, 상기 외장 케이스(20)는, 상기 전극체(10)를 수용하는 캔(21)과 상기 캔(21)의 개방된 상부를 차단하거나 덮는 캡(22)으로 구성될 수 있다.In addition, the exterior case 20 may include a can 21 accommodating the electrode body 10 and a cap 22 that blocks or covers an open upper portion of the can 21.
그리고, 상기 전극체(10)의 상단 및 하단에는 상기 양극판(11)에서 방출하는 양이온을 안정적으로 흡장할 수 있도록 상기 음극판(12)이 각각 배치될 수 있다.The negative electrode plates 12 may be disposed at upper and lower ends of the electrode body 10 to stably occlude cations emitted from the positive electrode plate 11.
상기와 같이 구성된 코인형 이차전지(1)는, 상기 전극체(10)의 양극판(11)과 음극판(12)이 상기 외장 케이스(20)와 전기적으로 연결되어야 제 기능을 수행할 수 있다.The coin-type secondary battery 1 configured as described above may perform its function only when the positive electrode plate 11 and the negative electrode plate 12 of the electrode body 10 are electrically connected to the exterior case 20.
따라서, 상기 코인형 이차전지를 제조하기 위해서는, 상기 양극판(11)에서 돌출 형성된 양극리드(11a)를 상기 캔(21)의 바닥면과 연결시키는 작업을 수행해야 하며, 그 작업 방식으로 초음파 용접 등의 용접방식 또는 초음파 용착방식이 사용될 수 있다.Therefore, in order to manufacture the coin-type secondary battery, the operation of connecting the positive electrode lead 11a protruding from the positive electrode plate 11 and the bottom surface of the can 21 should be performed, and ultrasonic welding or the like as the operation method. Welding method or ultrasonic welding method may be used.
즉, 상기 전극체(10)를 상기 캔(21)에 수용한 상태에서 상기 캔(21)의 개방된 상부를 통하여 상기 양극판(11)의 양극리드(11a)를 상기 캔(21)의 바닥면에 초음파 용접 또는 초음파 용착방식으로 접합시킬 수 있다. 이 때, 적층된 다수개의 양극판(11)의 양극리드(11a)들을 모두 한 군데 모아서 캔(21)의 내측 바닥에 용접 등을 하여 양극판(11)과 캔(21)을 전기적으로 연결하게 된다.That is, in the state in which the electrode body 10 is accommodated in the can 21, the anode lead 11a of the positive electrode plate 11 is opened on the bottom surface of the can 21 through the open upper portion of the can 21. It can be bonded by ultrasonic welding or ultrasonic welding method. At this time, the positive electrode leads 11a of the plurality of stacked positive electrode plates 11 are gathered together to weld the inner bottom of the can 21 to electrically connect the positive electrode plate 11 and the can 21 to each other.
그러나, 상기와 같은 작업 후에는 초음파 용접 또는 초음파 용착방식으로 상기 음극판(12)에서 돌출 형성된 음극리드(12a)를 상기 캡(22)의 저면에 접합시키는 작업이 매우 어렵다.However, after the above operation, it is very difficult to bond the negative electrode lead 12a protruding from the negative electrode plate 12 to the bottom surface of the cap 22 by ultrasonic welding or ultrasonic welding.
왜냐하면, 용접전극 또는 용착전극이, 상기 양극판(11)의 양극리드(11a)를 상기 캔(21)의 바닥면에 접합시킬 시에는, 상기 캔(21)의 개방된 상부를 통과하여 상기 캔(21)의 내부공간에 삽입될 수 있었다. 하지만, 상기 용접 전극 또는 용착전극이 상기 음극판(12)의 음극리드(12a)를 상기 캡(22)의 저면과 접합시킬 시에는 상기 캔(21)의 개방된 상부가 상기 캡(22)에 의해 차단되거나 덮인 상태이기 때문에 상기 캔(21)의 내부로 삽입될 수 없기 때문이다.When the welding electrode or the welding electrode joins the positive electrode lead 11a of the positive electrode plate 11 to the bottom surface of the can 21, the welding electrode or the welding electrode passes through the open upper portion of the can 21. 21 could be inserted into the inner space. However, when the welding electrode or the welding electrode joins the negative electrode lead 12a of the negative electrode plate 12 with the bottom surface of the cap 22, the open upper portion of the can 21 is opened by the cap 22. This is because it cannot be inserted into the can 21 because it is blocked or covered.
즉, 상기 용접 전극 또는 용착 전극은, 양극판(11)의 양극리드(11a)를 상기 캔(21)의 바닥면에 접합시킬 시에는, 상기 캔(21)의 내부공간으로 삽입되어 상기 양극판(11)의 양극리드(11a) 및 상기 캔(21)의 바닥면을 수직방향으로 가압할 수 있으나, 상기 양극판(11)의 양극리드(11a)가 상기 캔(21)의 바닥면에 용접 등에 의해서 전기적으로 접합된 상태에서 상기 음극판(12)의 음극리드(12a)를 상기 캡(22)의 저면에 접합시킬 시에는 상기 음극판(12)의 음극리드(12a) 및 상기 캡(22)의 저면을 수직방향으로 가압할 수가 없다.That is, the welding electrode or the welding electrode is inserted into the inner space of the can 21 when the anode lead 11a of the anode plate 11 is joined to the bottom surface of the can 21. The positive electrode lead 11a of the can and the bottom surface of the can 21 can be pressed in the vertical direction, but the positive electrode lead 11a of the positive electrode plate 11 is electrically connected to the bottom surface of the can 21 by welding or the like. When the negative electrode lead 12a of the negative electrode plate 12 is bonded to the bottom of the cap 22 in the bonded state, the negative electrode lead 12a of the negative electrode plate 12 and the bottom of the cap 22 are perpendicular to each other. It cannot be pressed in the direction.
이에 따라, 종래에는, 상기 캡(22)이 캔(21)의 개방된 상부를 덮을 때 상기 캡(22)의 저면을 상기 전극체(10)의 최상단에 배치된 음극판(12)과 단순 접촉시키는 방식이 사용되었다.Accordingly, in the related art, when the cap 22 covers the open top of the can 21, the bottom surface of the cap 22 is simply brought into simple contact with the negative electrode plate 12 disposed at the top of the electrode body 10. Method was used.
하지만, 위와 같은 단순 접촉방식은 상기 음극판(12)과 상기 캡(22)의 저면 사이에 접촉저항이 증가되는 현상을 유발하고 결국 코인형 이차전지의 성능이 저하되는 문제점을 제공한다.However, the simple contact method as described above causes a phenomenon in which contact resistance is increased between the negative electrode plate 12 and the bottom surface of the cap 22, thereby providing a problem in that the performance of the coin-type secondary battery is degraded.
상기와 같은 문제점을 해결하기 위하여 유연성을 갖는 전선의 일단 및 타단을 상기 음극판(12) 및 상기 캡(22)의 저면에 각각 용접 또는 용착 방식으로 접하는 방식이 제안되었으나, 위와 같은 방식은 상기 캡(22)을 상기 캔(21)의 상단에 결합하는 과정에서 발생되는 전선의 얽힘이나 뒤틀림을 감안하여 상기 캔(21)을 공간을 늘려야 되는 문제점이 있으며, 이에 따라, 캔(21)의 내부에 잔여공간이 형성되어 코인형 이차전지의 부피당 에너지 밀도가 떨어질 수 있다.In order to solve the above problems, a method of contacting one end and the other end of the flexible wire with the bottom surface of the negative electrode plate 12 and the cap 22 by welding or welding has been proposed, but the above method is the cap ( In view of the entanglement or twisting of the wires generated in the process of coupling 22 to the upper end of the can 21, there is a problem in that the space of the can 21 needs to be increased, and thus, the inside of the can 21 remains. The space may be formed to decrease the energy density per volume of the coin-type secondary battery.
따라서, 본 출원인은 상기와 같은 문제점을 해결하기 위하여 본 발명을 개발하게 되었으며, 이와 관련된 선행기술문헌으로는 대한민국 공개특허공보 공개번호 10-2008-0029840호의 '코인형 전지'가 있다.Therefore, the present applicant has developed the present invention to solve the above problems, there is a related art 'coin-type battery' of the Republic of Korea Patent Publication No. 10-2008-0029840.
본 발명은 상기와 같은 문제점을 해결하기 위한 것으로서, 캔에 결합되지 않은 캡의 저면과 상기 캔에 수용된 전극체의 음극판 중 가장 위쪽에 있는 음극판에 높이는 도전체를 용접 또는 용착방식으로 캡에 전기적으로 연결하되 상기 캡이 캔에 결합 될 시에는 상기 음극판과 동일한 수평적 자세로 변형되어 상기 캔에 수용될 수 있는 도전체를 제공할 수 있다.The present invention has been made to solve the above problems, and electrically conductive to the cap by welding or welding a conductor that is raised to the uppermost negative electrode plate of the bottom surface of the cap not coupled to the can and the negative electrode plate of the electrode body accommodated in the can. When the cap is coupled to the can, the cap may be deformed in the same horizontal position as the negative electrode plate to provide a conductor that can be accommodated in the can.
본 발명은, 복수개의 양극판과 음극판이 교대로 적층되되 상단과 하단에는 상기 음극판이 각각 배치되는 전극체; 상기 전극체 및 전해액을 수용하며, 상부가 개방된 캔; 상기 캔의 상단에 결합되어 상기 캔의 개방된 상부를 차단하는 캡; 및 상기 캔의 상부가 개방된 상태에서 상기 캔에 수용된 전극체와 상기 캡을 전기적으로 연결하며, 상기 캡에 의해 상기 캔의 상부가 덮이거나 차단되면 상기 전극체의 상단에 배치된 음극판과 동일한 수평자세로 변형되는 도전체;를 포함할 수 있다.The present invention, a plurality of positive electrode plate and the negative electrode plate are alternately stacked, the upper and lower electrode body each disposed with the negative electrode plate; A can accommodating the electrode body and the electrolyte and having an open top; A cap coupled to an upper end of the can to block an open top of the can; And an electrical connection between the electrode body accommodated in the can and the cap while the upper portion of the can is open, and when the upper portion of the can is covered or blocked by the cap, the same level as that of the negative electrode plate disposed on the upper portion of the electrode body It may include a conductor deformed in a posture.
또한, 상기 도전체는, 상기 전극체의 상단에 배치된 음극판과 접합되는 제1접합편; 상기 제1접합편에 연결된 상태로 상기 전극체의 상단에 배치된 음극판 상부에 놓여지며, 상기 캔의 개방된 상부로 선회 가능한 플레이트; 상기 플레이트에 형성되는 절개부; 및 상기 절개부가 형성하는 영역에 배치되며, 상기 캔의 개방된 상부로 선회되는 플레이트 상에서 돌출 또는 선회되어 상기 캡의 저면과 접합되는 제2접합편;을 포함할 수 있다.In addition, the conductor may include a first joining piece bonded to a negative electrode plate disposed on an upper end of the electrode body; A plate placed on an upper portion of a negative electrode plate disposed on an upper end of the electrode body in a state of being connected to the first joining piece, and being pivotable to an open upper portion of the can; An incision formed in the plate; And a second joining piece disposed in a region formed by the cutout and protruding or pivoting on a plate pivoting to an open top of the can to be joined to a bottom surface of the cap.
또한, 상기 절개부는, 상기 플레이트의 둘레방향을 따라 연속적으로 회전되어 형성될 수 있다.In addition, the cutout may be formed by continuously rotating in the circumferential direction of the plate.
또한, 상기 제2접합편은, 상기 플레이트 상에서 나선형으로 돌출되어 상기 캡의 저면과 전기적으로 접합되거나 접속될 수 있다.In addition, the second joining piece may protrude helically on the plate to be electrically joined or connected to the bottom surface of the cap.
또한, 상기 제2접합편은, 상기 캔의 중심을 기준으로 상기 캔의 중심 반대 방향을 향해 상기 플레이트 상에서 돌출 형성될 수 있다.In addition, the second bonding piece may protrude on the plate toward a direction opposite to the center of the can with respect to the center of the can.
또한, 상기 절개부는, 상기 플레이트 상에서 ㄷ 형상 또는 아크 형상 중 어느 하나의 형상으로 형성될 수 있다.In addition, the cutout may be formed in any one of a c shape or an arc shape on the plate.
또한, 상기 제2접합편은, 상기 절개부가 형성하는 공간 내에서 선회된 상태로 상기 플레이트 상에서 돌출되어 상기 캡의 저면과 전기적으로 접합되거나 접속될 수 있다.In addition, the second joining piece may protrude on the plate while being pivoted in a space formed by the cutout to be electrically connected to or connected to a bottom surface of the cap.
또한, 상기 제2접합편이 상기 절개부가 형성하는 공간 내에서 선회되는 방향 및 상기 캔의 중심을 기준으로 상기 플레이트 상에서 돌출되는 방향은, 상기 절개공의 형성위치 및 상기 캡의 배치방향에 따라 달라질 수 있다.In addition, the direction in which the second joining piece is pivoted in the space formed by the cutout and the direction of protruding from the plate with respect to the center of the can may vary depending on the formation position of the cutout and the arrangement direction of the cap. have.
또한, 상기 캔에 상기 캡이 결합되면, 상기 제2접합편의 윗면 및 저면은 상기 캡의 저면 및 상기 전극체의 상단에 배치된 음극판의 윗면과 각각 접촉될 수 있다.In addition, when the cap is coupled to the can, the top and bottom surfaces of the second joining piece may contact the bottom surface of the cap and the top surface of the negative electrode plate disposed on the top of the electrode body, respectively.
본 발명은, 캔에 수용된 전극체의 음극판과 상기 캔의 개방된 상부를 차단하는 캡이 도전체에 의해 용접 또는 용착방식에 의해 연결될 수 있으므로, 상기 캡과 음극판 사이에 발생되는 접촉저항이 방지되어 전지의 수명이 연장되는 효과가 있다.According to the present invention, since the negative electrode plate of the electrode body accommodated in the can and the cap blocking the open top of the can can be connected by welding or welding by a conductor, the contact resistance generated between the cap and the negative electrode plate is prevented. There is an effect of extending the life of the battery.
또한, 본 발명은, 도전체를 전극체의 음극판 및 캡 각각과 용접 또는 용착방식으로 전기적 접합하는 작업방식이 용이하기 때문에, 작업자의 작업능률이 향상되어 이차전지의 생산성이 증가되는 효과가 있다.In addition, the present invention has an effect that the work method of electrically connecting the conductor with the negative electrode plate and the cap of the electrode body by welding or welding method is easy, thereby improving the work efficiency of the operator and increasing the productivity of the secondary battery.
또한, 본 발명은, 전극체의 음극판 및 캡을 용접 또는 용착방식으로 연결하는 도전체가 상기 캡이 캔에 결합될 시에는 적층된 음극판과 동일한 모양이 되도록 평면을 갖는 판 형상으로 변형되어 상기 캔 내부에 수용될 수 있기 때문에, 상기 캔 내부에 잔여공간이 형성되지 않아 부피당 에너지 밀도를 유지할 수 있는 효과가 있다.In addition, the present invention, the conductor that connects the negative electrode plate and the cap of the electrode body by welding or welding method is deformed into a plate shape having a plane so as to have the same shape as the stacked negative plate when the cap is coupled to the can inside the can Since it can be accommodated in, the remaining space is not formed inside the can has the effect of maintaining the energy density per volume.
도 1은 종래기술에 따른 코인형 이차전지의 단면도.1 is a cross-sectional view of a coin-type secondary battery according to the prior art.
도 2는 본 발명의 일 실시예에 따른 음극판 용접 구조를 갖는 코인형 이차전지의 단면도.2 is a cross-sectional view of a coin-type secondary battery having a negative electrode plate welding structure according to an embodiment of the present invention.
도 3은 도 2에 따른 이차전지에 있어서 용접단자 또는 용착단자에 의해 도전체의 제1접합편이 음극판에 접합되는 모습을 보여주는 단면도.3 is a cross-sectional view illustrating a state in which a first bonding piece of a conductor is bonded to a negative electrode plate by a welding terminal or a welding terminal in the secondary battery of FIG. 2.
도 4는 도 2에 따른 도전체의 사시도.4 is a perspective view of the conductor according to FIG. 2;
도 5는 도 4에 도시된 도전체에서 제2접합편이 플레이트 상에서 돌출된 상태를 보여주는 사시도.FIG. 5 is a perspective view illustrating a state in which the second bonding piece protrudes from a plate in the conductor shown in FIG. 4. FIG.
도 6은 도 4에 따른 도전체의 제2접합편이 캡의 저면과 접합되는 모습을 보여주는 단면도.6 is a cross-sectional view showing a state in which the second bonding piece of the conductor according to FIG. 4 is bonded to the bottom of the cap.
도 7은 본 발명의 다른 실시예에 따른 도전체의 사시도.7 is a perspective view of a conductor according to another embodiment of the present invention.
도 8은 도 7에 도시된 도전체에서 제2접합편이 플레이트 상에서 돌출된 상태를 보여주는 사시도.FIG. 8 is a perspective view illustrating a state in which the second bonding piece protrudes from a plate in the conductor shown in FIG. 7. FIG.
도 9는 도 7에 도시된 도전체의 제2접합편이 캡의 저면과 접합되는 모습을 보여주는 단면도.FIG. 9 is a cross-sectional view illustrating a state in which the second bonding piece of the conductor illustrated in FIG. 7 is bonded to the bottom surface of the cap. FIG.
도 10은 본 발명의 다른 실시예에 따른 도전체의 접합편이 전방 또는 후방으로 선회되어 플레이트 상에서 돌출된 모습을 보여주는 평면도.10 is a plan view showing a state in which the bonding piece of the conductor according to another embodiment of the present invention is rotated forward or backward to protrude on the plate.
본 발명의 이점 및 특징, 그리고 그것들을 달성하는 방법은 첨부되는 도면과 함께 상세하게 후술되어 있는 실시예들을 참조하면 명확해질 것이다.Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings.
그러나, 본 발명은 이하에서 개시되는 실시예들에 한정되는 것이 아니라 서로 다른 다양한 형태로 구현될 것이며, 단지 본 실시예들은 본 발명의 개시가 완전하도록 하며, 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에게 발명의 범주를 완전하게 알려주기 위해 제공되는 것이며, 본 발명은 청구항의 범주에 의해 정의될 뿐이다.However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, only the present embodiments to make the disclosure of the present invention complete, and common knowledge in the art to which the present invention pertains. It is provided to fully inform the person having the scope of the invention, which is defined only by the scope of the claims.
이하, 도 2 내지 도 10을 참조하여 본 발명의 실시예에 따른 음극판 용접구조를 갖는 코인형 이차전지가 상세하게 설명된다. 본 발명을 설명함에 있어, 관련된 공지기능 혹은 구성에 대한 구체적인 설명은 발명의 요지를 모호하지 않게 하기 위하여 생략된다.Hereinafter, a coin-type secondary battery having a negative electrode plate welding structure according to an embodiment of the present invention will be described in detail with reference to FIGS. 2 to 10. In describing the present invention, specific descriptions of related well-known functions or configurations are omitted in order not to obscure the subject matter of the present invention.
도 2 내지 도 6에 도시된 바와 같이 본 발명의 일 실시예에 따른 음극단자 용접구조를 갖는 코인형 이차전지(100)는, 복수개의 양극판(111)과 음극판(113)이 교대로 적층되되 캡(130)과 마주 보는 상단과 캔(120)과 마주 보는 하단에는 상기 음극판(113)이 각각 배치되는 전극체(110)와, 상기 전극체(110) 및 전해액을 수용하며 상부가 개방된 캔(120)과, 상기 캔(120)의 상단에 결합되어 상기 캔(120)의 개방된 상부를 차단하는 캡(130) 및 상기 캔(120)의 상부가 개방된 상태에서 상기 캔(120)에 수용된 전극체(110) 중 음극판(113)과 상기 캡(130)을 전기적으로 연결하며, 상기 캡(130)에 의해 상기 캔(120)의 상부가 덮이거나 차단되면 상기 전극체(110)의 상단에 배치된 음극판(113)과 동일한 평평한 모양으로 변형되는 도전체(140);를 포함할 수 있다.2 to 6, the coin-type secondary battery 100 having a negative electrode terminal welding structure according to an embodiment of the present invention, a plurality of positive electrode plate 111 and the negative electrode plate 113 are alternately stacked cap On the top facing the 130 and the bottom facing the can 120, an electrode body 110 in which the negative electrode plate 113 is disposed, and a can receiving the electrode body 110 and the electrolyte and having an open top ( 120 and a cap 130 coupled to an upper end of the can 120 to block an open upper portion of the can 120 and accommodated in the can 120 with an upper portion of the can 120 opened. The cathode plate 113 and the cap 130 of the electrode body 110 are electrically connected to each other. When the upper portion of the can 120 is covered or blocked by the cap 130, the electrode 130 may be disposed at the upper end of the electrode body 110. And a conductor 140 that is deformed into the same flat shape as the disposed negative electrode plate 113.
상기 전극체(110)를 구성하는 복수개의 양극판(111) 및 음극판(113)은 상기 캔(120)에 수용될 수 있는 형상 또는 크기를 가지며, 대략적으로 원형, 타원형 또는 트랙(track) 모양으로 이루어진다.The plurality of positive electrode plates 111 and the negative electrode plates 113 constituting the electrode body 110 may have a shape or size that can be accommodated in the can 120 and have a substantially circular, elliptical or track shape. .
그리고, 상기 복수개의 양극판(111) 및 음극판(113)에는 양극 리드(111a) 및 음극 리드(113b)가 각각 돌출 형성될 수 있다.The positive lead 111a and the negative lead 113b may protrude from the plurality of positive electrode plates 111 and the negative electrode plates 113, respectively.
상기 복수개의 양극판(111)에서 각각 형성된 복수개의 양극 리드(111a)들은, 본 명세서 발명의 배경이 되는 기술란에서 설명된 바와 같이, 용접 또는 용착 방식으로 상기 캔(120)의 저면에 전기적으로 접속되거나 접합될 수 있다. 그리고, 상기 복수개의 음극판(113)에서 각각 형성된 복수개의 음극 리드(113a)들은, 상기 캔(120)의 상부 측으로 돌출될 수 있다.Each of the plurality of positive electrode leads 111a formed on the plurality of positive electrode plates 111 may be electrically connected to the bottom surface of the can 120 by welding or welding, as described in the description of the background of the present disclosure. Can be bonded. In addition, the plurality of negative electrode leads 113a formed in the plurality of negative electrode plates 113 may protrude toward the upper side of the can 120.
상기 캔(120)은, 상부가 개방된 원통의 형상을 가질 수 있으며, 상기 전극체(110)의 양극 단자 역할을 할 수 있다.The can 120 may have a cylindrical shape with an open top, and may serve as a positive electrode terminal of the electrode body 110.
상기 캡(130)은 상기 캔(120)의 개방된 상부를 차단할 수 있도록 상기 캔(120)의 상단에 결합되며, 상기 전극체(110)의 음극 단자 역할을 할 수 있다.The cap 130 may be coupled to an upper end of the can 120 to block an open upper portion of the can 120, and serve as a negative terminal of the electrode body 110.
상기 도전체(140)는, 상기 전극체(110) 중 가장 상단에 배치된 음극판(113)과 상기 캡(130) 사이에 개재되어 상기 캡(130) 및 상기 음극판(113)을 전기적으로 접속하거나 접합할 수 있다. 이를 위해서 도전체(140)는 캡(130)과 용접 또는 용착 방식으로 접합될 수 있다.The conductor 140 is interposed between the negative electrode plate 113 disposed at the top of the electrode body 110 and the cap 130 to electrically connect the cap 130 and the negative electrode plate 113. Can be bonded. To this end, the conductor 140 may be bonded to the cap 130 by welding or welding.
상기 도전체(140)는 도전성이 우수한 구리금속 또는 니켈금속으로 제작될 수 있으며, 도 4에 도시된 바와 같이, 상기 전극체(110)의 가장 상단에 배치된 음극판(113)과 접합되는 제1접합편(141); 상기 제1접합편(141)에 연결된 상태로 상기 전극체(110)의 상단에 배치된 음극판(113) 상부에 놓여지며, 상기 캔(120)의 개방된 상부로 선회 가능한 플레이트(143); 상기 플레이트(143)에 형성되는 절개부(145); 및 상기 절개부(145)가 형성하는 영역에 배치되며, 상기 캔(120)의 개방된 상부로 선회되는 플레이트(143) 상에서 돌출 또는 선회되어 상기 캡(130)의 저면과 접합되는 제2접합편(147);을 포함할 수 있다.The conductor 140 may be made of copper metal or nickel metal having excellent conductivity, and as shown in FIG. 4, a first electrode bonded to the negative electrode plate 113 disposed at the top of the electrode body 110. Bonding piece 141; A plate 143 disposed on an upper portion of the negative electrode plate 113 disposed on an upper end of the electrode body 110 in a state of being connected to the first bonding piece 141, and pivotable to an open upper portion of the can 120; An incision 145 formed in the plate 143; And a second joining piece disposed in an area formed by the cutout 145 and protruding or pivoting on a plate 143 pivoting to an open upper portion of the can 120 to be joined to a bottom surface of the cap 130. 147).
상기 제1접합편(141)은, 도 3에 도시된 바와 같이, 상기 전극체(110)의 상단에 배치된 음극판(113)의 음극 리드(113a)와 접촉된 상태에서 용접단자 또는 용착단자에 의해 상기 음극 리드(113a)와 용접 방식 또는 용착 방식으로 전기적으로 서로 접합될 수 있다.As shown in FIG. 3, the first joining piece 141 is connected to a welding terminal or a welding terminal in a state of being in contact with the negative electrode lead 113a of the negative electrode plate 113 disposed on the upper end of the electrode body 110. By the cathode lead 113a may be electrically bonded to each other by a welding method or a welding method.
상기 제1접합편(141)이 상기 음극 리드(113a)와 접합되기 위해서는, 당연히 상기 용접단자 또는 용착단자가 상기 캔(120)의 내부공간으로 삽입될 수 있도록 상기 캔(120)의 상부가 개방되어 있어야 한다. In order for the first joining piece 141 to be joined to the negative electrode lead 113a, the upper portion of the can 120 may be opened so that the welding terminal or the welding terminal may be inserted into the inner space of the can 120. Should be.
상기 플레이트(143)는 상기 전극체(110)의 최상단에 배치된 음극판(113)의 상면에 놓여질 수 있다. 그리고, 상기 플레이트(143)는 상기 양극판(111) 또는 음극판(113)의 크기 및 형상과 동일한 것이 바람직하나, 이에 한정되는 것은 아니다. 즉, 상기 양극판(112) 또는 음극판(113)이 형성하는 면적에 포함될 수 있는 크기 및 그 상면 및 저면이 평행한 수평면을 갖는다면 다양한 형상으로 제작될 수 있다.The plate 143 may be placed on an upper surface of the negative electrode plate 113 disposed at the top of the electrode body 110. The plate 143 is preferably the same as the size and shape of the positive electrode plate 111 or the negative electrode plate 113, but is not limited thereto. That is, if the size that can be included in the area formed by the positive electrode plate 112 or the negative electrode plate 113 and the upper and lower surfaces thereof have parallel horizontal planes, they may be manufactured in various shapes.
상기 플레이트(143)는 상기 음극 리드(113a)와 접합된 제1접합편(141)에서 선회되어 상기 캔(120)의 개방된 상부로 노출될 수 있다.The plate 143 may be pivoted on the first bonding piece 141 bonded to the cathode lead 113a to be exposed to the open top of the can 120.
그리고, 상기 절개부(145)는 도 4에 도시된 바와 같이, 상기 플레이트(143)의 둘레방향을 따라 연속적으로 회전되어 형성될 수 있다. 즉, 상기 절개부(145)는 상기 플레이트(143)의 일측 테두리부에서 상기 플레이트(143)의 중심을 향해 나선형의 형상으로 형성될 수 있다.In addition, the cutout 145 may be formed by continuously rotating along the circumferential direction of the plate 143 as shown in FIG. 4. That is, the cutout 145 may be formed in a spiral shape toward the center of the plate 143 at one side edge of the plate 143.
한편, 절개부(145)는 도전체(140)에 슬릿(slit) 형태로 형성될 뿐만 아니라 일정한 폭 또는 갭(gap)을 가지도록 형성될 수 있다. 절개부(145)가 슬릿 형태로 형성되는 경우에는 도전체(145)에 컷팅된 라인만 형성되지만, 일정한 폭 또는 갭을 가지도록 형성되는 경우에는 절개부(145)의 폭이나 갭에 해당하는 부분에는 도전체(145)가 없는 형태가 될 수 있다.The cutout 145 may be formed to have a slit shape in the conductor 140 as well as to have a predetermined width or a gap. When the cutout 145 is formed in a slit shape, only a cut line is formed on the conductor 145. However, when the cutout 145 is formed to have a predetermined width or a gap, a portion corresponding to the width or the gap of the cutout 145 is formed. It may be in the form without a conductor 145.
상기 제2접합편(147)은, 상기 절개부(145)가 형성됨에 따라 상기 플레이트(143) 상에서 형성될 수 있다. 즉, 상기 제2접합편(147)은 상기 플레이트(143) 상에서 상기 절개부(145)가 형성되지 않은 부분이며, 도 5에 도시된 바와 같이 상기 플레이트(145) 상에서 나선형의 형상으로 돌출될 수 있다.The second bonding piece 147 may be formed on the plate 143 as the cutout 145 is formed. That is, the second joining piece 147 is a portion where the cutout 145 is not formed on the plate 143, and may protrude in a spiral shape on the plate 145 as shown in FIG. 5. have.
상기 제2접합편(147)은, 도 6에 도시된 바와 같이, 상기 전극체(110)의 음극판(113)에 놓여져 있던 플레이트(143)가 캡(130) 쪽으로 선회된 상태에서 상기 캡(130)이 배치된 방향으로 돌출될 수 있다. 여기서, 상기 플레이트(143)는 적어도 90도의 각도로 선회되어 세워지는 것이 바람직하다.As shown in FIG. 6, the second bonding piece 147 has the cap 130 with the plate 143 placed on the negative electrode plate 113 of the electrode body 110 turned toward the cap 130. ) May protrude in the direction in which it is disposed. Here, the plate 143 is preferably erected at an angle of at least 90 degrees to stand.
왜냐하면, 작업자가, 상기 제2접합편(147)과 상기 캡(130)을 용접단자 또는 용착단자로 접합하는 과정에서, 상기 용접단자 또는 용착단자를 수평으로 눕힌 상태로 상기 제2접합편(147)과 상기 캡(130)을 순차적으로 가압하여야 상기 제2접합편(147)과 상기 캡(130)이 정확하게 접합될 수 있기 때문이다.This is because, in the process of joining the second joining piece 147 and the cap 130 with a welding terminal or a welding terminal, an operator lays the welding terminal or the welding terminal horizontally, and the second bonding piece 147 This is because the second bonding piece 147 and the cap 130 may be accurately bonded only when the cap 130 and the cap 130 are sequentially pressed.
만약, 상기 플레이트(143)가 90도 미만의 각도로 선회된다면, 작업자는 상기 용접단자 또는 용착단자를 기울인 상태로 상기 제2접합편(147)과 상기 캡(130)을 접합시켜야 하며, 이에 따라, 작업자의 용접 또는 용착 작업 자세가 불편해져 기 제2접합편(147)과 상기 캡(130)이 부정확하게 접합될 수 있다.If the plate 143 is pivoted at an angle of less than 90 degrees, the operator should join the second joining piece 147 and the cap 130 with the welding terminal or the welding terminal tilted, and thus In an uncomfortable welding or welding operation posture, the second joining piece 147 and the cap 130 may be incorrectly joined.
그리고, 상기 제2접합편(147)은, 도 6에 도시된 바와 같이, 상기 캔(120)의 중심을 기준으로 상기 캔(120)의 중심 반대 방향을 향해 상기 플레이트(143) 상에서 돌출되는 것이 바람직하다. 즉, 제2접합편(147)은 캔(120)의 바닥에서부터 상부를 향하는 방향으로 돌출 형성되는 것이 바람직하다.As shown in FIG. 6, the second joining piece 147 protrudes from the plate 143 toward the opposite direction of the center of the can 120 based on the center of the can 120. desirable. That is, the second bonding piece 147 is preferably formed to protrude in the direction from the bottom of the can 120 toward the top.
만약, 상기 제2접합편(147)이 상기 캔(120)의 중심 방향을 향해 상기 플레이트(143) 상에서 돌출되면, 상기 제2접합편(147)과 접합되는 상기 캡(130)을 상기 캔(120)의 상부 측에 배치시켜야 하며, 이와 같은 상태에서는 상기 캡(130)의 길이방향 일단이 상기 캔(120)에 수용된 전극체(110)에 간섭을 받게 되어 작업자가 상기 제2접합편(147)과 상기 캡(130)의 접합작업을 용이하게 실시할 수 없기 때문이다.If the second joining piece 147 protrudes from the plate 143 toward the center direction of the can 120, the cap 130 joined to the second joining piece 147 may be attached to the can ( It should be disposed on the upper side of the 120, in this state, one end in the longitudinal direction of the cap 130 is interfered with the electrode body 110 accommodated in the can 120, the operator is the second bonding piece 147 This is because the joining operation of the cap 130 and the cap 130 cannot be easily performed.
이에 따라, 도 6에 도시된 바와 같이, 상기 캡(130)과 상기 캔(120)을 완전히 결합하지 않고 상기 캡(130)을 상기 캔(120)의 외측에 배치시킨 상태에서 상기 제2접합편(147)을 상기 캡(130)이 배치된 방향으로 돌출시키면, 작업자가 상기 제2접합편(147)과 상기 캡(130)의 접합작업을 용이하게 실시할 수 있다.Accordingly, as shown in FIG. 6, the second bonding piece in a state where the cap 130 is disposed outside the can 120 without completely coupling the cap 130 and the can 120. When projecting the 147 in the direction in which the cap 130 is disposed, the operator can easily perform the joining operation of the second joining piece 147 and the cap 130.
상기 캡(130)을 향해 돌출된 나선형 형상의 제2접합편(147)은 그 상단이 상기 캡(130)의 저면 중앙과 접촉될 수 있고, 이와 같은 상태에서 용접단자 또는 용착단자로 상기 제2접합편(147)과 상기 캡(130)을 순차적으로 가압하여 상기 제2접합편(147)이 상기 캡(130)을 서로 접합될 수 있다.The second joining piece 147 having a spiral shape protruding toward the cap 130 may have an upper end contacting the center of the bottom surface of the cap 130. In this state, the second joining piece 147 may be a welding terminal or a welding terminal. The bonding piece 147 and the cap 130 may be sequentially pressed to allow the second bonding piece 147 to bond the cap 130 to each other.
그리고, 상기 캔(120)의 개방된 상부를 덮거나 차단하기 위하여 상기 캡(130)을 상기 캔(120)의 상단에 결합하면, 상기 제2접합편(147)은 상기 캡(130)의 저면에 의해 가압을 받으면서, 도 2에 도시된 바와 같이, 상기 플레이트(143) 상에 수용되어 상기 플레이트(143)와 동일한 평면을 갖게 되고, 결국 상기 도전체(140)의 윗면 및 저면은 상기 캡(130)의 저면 및 상기 전극체(110)의 상단에 배치된 음극판(113)의 윗면과 각각 접촉될 수 있다. 따라서, 상기 캔(120)의 내부에는 잔여공간이 남지 않게 된다.Then, when the cap 130 is coupled to the upper end of the can 120 to cover or block the open top of the can 120, the second bonding piece 147 is the bottom surface of the cap 130. 2, the upper surface and the lower surface of the conductor 140 may be accommodated on the plate 143 to have the same plane as the plate 143, as shown in FIG. 2. The lower surface of the 130 and the upper surface of the negative electrode plate 113 disposed on the upper end of the electrode body 110 may be in contact with each other. Therefore, no residual space remains inside the can 120.
참고로, 본 발명의 실시예에서는 상기 플레이트(143)에 상기 절개부(145)가 나선형으로 형성되고 이에 따라, 상기 제2접합편(147) 또한 나선형으로 형성되어 상기 플레이트(143) 상에서 돌출 가능한 것으로 설명되었으나 이에 한정되는 것은 아니다.For reference, in the embodiment of the present invention, the cutout 145 is formed in the plate 143 in a spiral shape, and accordingly, the second joining piece 147 is formed in a spiral shape and protrudes from the plate 143. It has been described as, but not limited to.
즉, 상기 플레이트(143)에 ㄷ자 형상 또는 호의 형상을 갖는 절개부(145')가 형성될 수 있고, 이에 따라, 상기 절개부(145')가 형성하는 공간 내에 제2접합편(147')이 배치될 수 있다.That is, a cutout 145 'having a C shape or an arc shape may be formed in the plate 143, and thus, the second joining piece 147' is formed in a space formed by the cutout 145 '. This can be arranged.
상기 제2접합편(147')은 상기 절개부(145')가 형성하는 공간 내에 배치되며, 상기 음극판(113)에 놓여져 있던 플레이트(143)가 상기 캔(110)의 개방된 상부를 통하여 선회되면, 도 8 및 도 9에 도시된 바와 같이, 상기 절개부(145')가 형성하는 공간 내에서 선회되어 상기 플레이트(143) 상에서 돌출될 수 있다.The second bonding piece 147 ′ is disposed in a space formed by the cutout 145 ′, and the plate 143 placed on the negative electrode plate 113 pivots through an open upper portion of the can 110. 8 and 9, the cutting unit 145 may pivot in the space formed by the cutout 145 ′ to protrude on the plate 143.
상기 플레이트(143) 상에서 선회되어 돌출된 제2접합편(147')은 도 9에 도시된 바와 같이 상기 캔(120)의 상단과 결합되지 않은 상기 캡(130)의 저면과 용접 또는 용착 방식으로 접합될 수 있다.As shown in FIG. 9, the second joining piece 147 ′ pivoted on the plate 143 is welded or welded to the bottom surface of the cap 130 that is not coupled to the top of the can 120. Can be bonded.
그리고, 상기 제2접합편(147')이 상기 플레이트(143) 상에서 선회되는 각도는 적어도 90도 이상인 것이 바람직하다. 왜냐하면, 작업자가, 상기 제2접합편(147')과 상기 캡(130)을 용접단자 또는 용착단자로 접합하는 과정에서, 상기 용접단자 또는 용착단자를 수직으로 세운 상태로 상기 제2접합편(147')과 상기 캡(130)의 저면을 순차적으로 가압하여야 상기 제2접합편(147')과 상기 캡(130)이 정확하게 접합될 수 있기 때문이다.The angle at which the second joining piece 147 'is pivoted on the plate 143 is preferably at least 90 degrees. This is because, in the process of the worker joining the second joining piece 147 'and the cap 130 with a welding terminal or a welding terminal, the second joining piece ( 147 'and the bottom surface of the cap 130 must be sequentially pressed so that the second joining piece 147' and the cap 130 can be accurately bonded.
만약, 상기 제2접합편(147')이 90도 미만의 각도로 선회된다면, 작업자는 상기 용접단자 또는 용착단자를 기울인 상태로 상기 제2접합편(147')과 상기 캡(130)의 저면을 접합시켜야 하며, 이에 따라, 작업자의 용접 또는 용착 작업 자세가 불편해져 상기 제2접합편(147')과 상기 캡(130)의 저면이 부정확하게 접합될 수 있다.If the second joining piece 147 'is pivoted at an angle of less than 90 degrees, the operator is inclined to the welding terminal or the welding terminal, and the bottom surface of the second joining piece 147' and the cap 130 is inclined. Therefore, the welding or welding work posture of the operator is inconvenient, and thus the bottom surface of the second joining piece 147 ′ and the cap 130 may be incorrectly joined.
그리고, 상기 제2접합편(147')이 상기 절개부(145')가 형성하는 공간 내에서 선회되는 방향 및 상기 캔(110)의 중심을 기준으로 상기 플레이트(143) 상에서 돌출되는 방향은, 상기 절개부(145')의 형성위치에 따라 다양하게 선택될 수 있고, 또한, 상기 캡(130)의 배치방향에 따라 다양하게 선택될 수도 있다.In addition, the direction in which the second joining piece 147 'is pivoted in the space formed by the cutout 145' and the direction in which the second joining piece 147 'protrudes on the plate 143 based on the center of the can 110 are: It may be variously selected according to the formation position of the cutout 145 ′, and may also be variously selected according to the arrangement direction of the cap 130.
즉, 상기 제2접합편(147')이, 상기 캔(120)의 개방된 상부로 선회된 상기 플레이트(143) 상에서 상부로 선회되어 상기 캔(120)의 외측 방향으로 돌출되는 것으로 설명 및 도면상에 도시되었으나 이에 한정되는 것은 아니며, 상기 캔(120)의 개방된 상부로 선회된 상기 플레이트(143) 상에서 상부 또는 하부 방향으로 선회될 수 있고, 도 10에 도시된 바와 같이 상기 플레이트(143) 상에서 전방 또는 후방 방향으로 선회될 수 있다.That is, the second bonding piece 147 ′ may be pivoted upward on the plate 143 pivoted to the open upper portion of the can 120 to protrude in an outward direction of the can 120. Although shown in the above, but not limited thereto, the plate 143 may be pivoted upward or downward on the plate 143 pivoted to the open top of the can 120, as shown in FIG. 10. It can be pivoted forward or backward in the phase.
그리고, 상기 제2접합편(147')이 상기 캔(120)의 중심을 기준으로 상기 플레이트(143) 상에서 돌출되는 방향 또한 상기 캔(120)의 중심 또는 중심 반대 방향으로 돌출될 수 있다.In addition, the direction in which the second bonding piece 147 ′ protrudes from the plate 143 based on the center of the can 120 may also protrude in the center of the can 120 or in a direction opposite to the center thereof.
이때, 상기 제2접합편(147')은 상기 플레이트(143) 상에서 상기 캔(120)의 중심 반대 방향으로 돌출되는 것이 바람직하다.In this case, the second joining piece 147 ′ may protrude in the direction opposite to the center of the can 120 on the plate 143.
왜냐하면, 상기 제2접합편(147')이 상기 플레이트(143) 상에서 상기 캔(120)의 중심 방향으로 돌출되면, 상기 캡(130)이 필연적으로 상기 캔(120)의 상부에 배치되기 때문이다. 좀더 구체적으로 설명하면, 상기 캔(120)과 상기 캡(130) 사이에 형성되는 공간에서 작업자가 용접단자 또는 용착단자를 이용하여 상기 제2접합편(147')과 상기 캡(130)의 저면을 접합시키는 작업이 수행하기에는 그 공간이 매우 협소하기 때문이다.This is because when the second joining piece 147 ′ protrudes toward the center of the can 120 on the plate 143, the cap 130 is inevitably disposed on the top of the can 120. . In more detail, in the space formed between the can 120 and the cap 130, a worker uses a welding terminal or a welding terminal to form a bottom surface of the second joining piece 147 ′ and the cap 130. This is because the space is very small for the joining operation.
그리고, 상기 캔(120)의 개방된 상부를 차단하기 위하여 상기 캡(130)을 상기 캔(120)의 상단에 결합하면, 상기 제2접합편(147')은 상기 캡(130)의 저면에 가압을 받으면서, 도 2에 도시된 바와 같이, 상기 절개부(145')가 형성하는 공간 내로 수용되어 상기 플레이트(143)와 동일한 평면을 가질 수 있게 된다.In addition, when the cap 130 is coupled to the upper end of the can 120 to block the open upper portion of the can 120, the second joining piece 147 ′ is formed on the bottom surface of the cap 130. While being pressurized, as shown in FIG. 2, the cutout 145 ′ may be accommodated into a space defined by the cutout 145 ′ to have the same plane as the plate 143.
위와 같은 상태가 되면, 상기 캔(120)에 수용된 전극체(110)의 음극판(113)과 상기 캡(130)은 상기 도전체(140)를 매개로 하여 단순 접촉방식이 아닌 용접 또는 용착 방식으로 서로 전기적으로 연결될 수 있다. When the state as described above, the negative electrode plate 113 and the cap 130 of the electrode body 110 accommodated in the can 120 through the conductor 140 by a welding or welding method rather than a simple contact method. It can be electrically connected to each other.
상기와 같이 구성을 갖는, 본 발명의 실시예에 따른 음극판 용접구조를 갖는 코인형 이차전지(100)는, 캔(120)에 수용된 전극체(110)의 음극판(113)과 상기 캔(120)의 개방된 상부를 차단하는 캡(130)이 도전체(140)를 매개로 하여 용접 또는 용착방식에 의해 전기적으로 연결될 수 있으므로, 상기 캡(130)과 음극판(113) 사이에 발생되는 접촉저항이 방지되어 전지의 수명이 연장될 수 있다.Coin-type secondary battery 100 having a negative electrode plate welding structure according to an embodiment of the present invention having the configuration as described above, the negative electrode plate 113 and the can 120 of the electrode body 110 accommodated in the can 120 Since the cap 130 blocking the open upper portion of the cap 130 may be electrically connected by welding or welding through the conductor 140, the contact resistance generated between the cap 130 and the negative electrode plate 113 may be reduced. Can prevent the battery life.
또한, 본 발명의 실시예에 따른 음극판 용접구조를 갖는 코인형 이차전지(100)는, 도전체(140)를 전극체(110)의 음극판(113) 및 상기 캡(130) 각각과 용접 또는 용착방식으로 접합하는 작업방식이 용이하기 때문에, 작업자의 작업능률이 향상되어 이차전지의 생산성이 증가되는 효과가 있다.In addition, in the coin-type secondary battery 100 having a negative electrode plate welding structure according to an embodiment of the present invention, the conductor 140 is welded or welded to each of the negative electrode plate 113 and the cap 130 of the electrode body 110. Since the operation method of joining in the manner is easy, the work efficiency of the operator is improved, there is an effect that the productivity of the secondary battery is increased.
또한, 본 발명은, 상기 도전체(140)가 상기 캡(130)이 캔(120)에 결합될 시에는 평면을 갖는 판 형상으로 변형되어 상기 캔(120) 내부에 수용될 수 있기 때문에, 상기 캔(120) 내부에 잔여공간이 형성되지 않아 부피당 에너지 밀도를 유지할 수 있는 효과가 있다.In addition, according to the present invention, since the conductor 140 is deformed into a plate shape having a plane when the cap 130 is coupled to the can 120, the conductor 140 may be accommodated inside the can 120. Since no residual space is formed inside the can 120, there is an effect of maintaining energy density per volume.
지금까지 본 발명에 따른 구체적인 실시예에 관하여 설명하였으나, 본 발명의 범위에서 벗어나지 않는 한도 내에서는 여러 가지 변형이 가능함은 물론이다.While specific embodiments of the present invention have been described so far, various modifications are possible without departing from the scope of the present invention.
그러므로, 본 발명의 범위는 설명된 실시예에 국한되어 정해져서는 안되며, 후술하는 특허 청구의 범위뿐 아니라 이 특허 청구의 범위와 균등한 것들에 의해 정해져야 한다.Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the claims below, but also by the equivalents of the claims.
본 발명은 스마트폰, 카메라, 노트북 등 다양한 전자기기에 적용될 수 있으며, 전자기기와 함께 소비자에게 판매되거나 별도로 판매될 수 있다.The present invention can be applied to a variety of electronic devices such as smartphones, cameras, notebooks, and can be sold to consumers or sold separately along with the electronic devices.

Claims (9)

  1. 복수개의 양극판과 음극판이 교대로 적층되되 상단과 하단에는 상기 음극판이 각각 배치되는 전극체;An electrode body in which a plurality of positive electrode plates and negative electrode plates are alternately stacked, and the negative electrode plates are disposed at upper and lower ends, respectively;
    상기 전극체 및 전해액을 수용하며, 상부가 개방된 캔;A can accommodating the electrode body and the electrolyte and having an open top;
    상기 캔의 상단에 결합되어 상기 캔의 개방된 상부를 차단하는 캡; 및A cap coupled to an upper end of the can to block an open top of the can; And
    상기 캔의 상부가 개방된 상태에서 상기 캔에 수용된 전극체와 상기 캡을 전기적으로 연결하며, 상기 캡에 의해 상기 캔의 상부가 덮이거나 차단되면 상기 전극체의 최상단에 배치된 음극판과 동일한 수평자세로 변형되는 도전체;The cap is electrically connected to the electrode body accommodated in the can while the upper part of the can is opened. When the upper part of the can is covered or blocked by the cap, the same horizontal position as that of the negative electrode plate disposed at the top of the electrode body. A conductor deformed into;
    를 포함하는 것을 특징으로 하는 음극판 용접 구조를 갖는 코인형 이차전지.Coin-type secondary battery having a negative electrode plate welding structure comprising a.
  2. 제 1 항에 있어서,The method of claim 1,
    상기 도전체는,The conductor,
    상기 전극체의 최상단에 배치된 음극판과 접합되는 제1접합편;A first joining piece joined to a negative electrode plate disposed at an uppermost end of the electrode body;
    상기 제1접합편에 연결된 상태로 상기 전극체의 최상단에 배치된 음극판 상부에 놓여지며, 상기 캔의 개방된 상부로 선회 가능한 플레이트;A plate disposed on an upper portion of a negative electrode plate disposed at an uppermost end of the electrode body in a state of being connected to the first joining piece, the plate being pivotable to an open top of the can;
    상기 플레이트에 형성되는 절개부; 및An incision formed in the plate; And
    상기 절개부가 형성하는 영역에 배치되며, 상기 캔의 개방된 상부로 선회되는 플레이트 상에서 돌출 또는 선회되어 상기 캡의 저면과 접합되는 제2접합편;A second joining piece disposed in an area defined by the cutout and protruding or pivoting on a plate pivoting to an open top of the can to be joined to a bottom surface of the cap;
    을 포함하는 것을 특징으로 하는 음극판 용접 구조를 갖는 코인형 이차전지.Coin-type secondary battery having a negative electrode welding structure comprising a.
  3. 제 2 항에 있어서,The method of claim 2,
    상기 절개부는,The cut portion,
    상기 플레이트의 둘레방향을 따라 연속적으로 회전되어 형성되는 것을 특징으로 하는 음극판 용접 구조를 갖는 코인형 이차전지.The coin-type secondary battery having a negative electrode plate welding structure, characterized in that is formed to be continuously rotated along the circumferential direction of the plate.
  4. 제 3 항에 있어서,The method of claim 3, wherein
    상기 제2접합편은,The second joining piece,
    상기 플레이트 상에서 나선형으로 돌출되어 상기 캡의 저면과 전기적으로 접합되거나 접속되는 것을 특징으로 하는 음극판 용접 구조를 갖는 코인형 이차전지.The coin-type secondary battery having a negative electrode welding structure, characterized in that the spiral projecting on the plate is electrically bonded or connected to the bottom surface of the cap.
  5. 제 4 항에 있어서,The method of claim 4, wherein
    상기 제2접합편은,The second joining piece,
    상기 캔의 중심을 기준으로 상기 캔의 중심 반대 방향을 향해 상기 플레이트 상에서 돌출되는 것을 특징으로 하는 음극판 용접 구조를 갖는 코인형 이차전지.The coin-type secondary battery having a negative electrode welding structure, characterized in that protruding on the plate toward the direction opposite to the center of the can with respect to the center of the can.
  6. 제 2 항에 있어서,The method of claim 2,
    상기 절개부는,The cut portion,
    상기 플레이트 상에서 ㄷ 형상 또는 아크 형상 중 어느 하나의 형상으로 형성되는 것을 특징으로 하는 음극판 용접 구조를 갖는 코인형 이차전지.The coin-type secondary battery having a negative electrode plate welding structure, characterized in that formed on the plate in the shape of any one of c shape or arc shape.
  7. 제 6 항에 있어서,The method of claim 6,
    상기 제2접합편은,The second joining piece,
    상기 절개부가 형성하는 공간 내에서 선회된 상태로 상기 플레이트 상에서 돌출되어 상기 캡의 저면과 전기적으로 접합되거나 접속되는 것을 특징으로 하는 음극판 용접 구조를 갖는 코인형 이차전지.The coin-type secondary battery having a negative electrode welding structure, characterized in that it is projected on the plate in a state of turning in the space formed by the cut portion is electrically bonded or connected to the bottom surface of the cap.
  8. 제 7 항에 있어서,The method of claim 7, wherein
    상기 제2접합편이 상기 절개부가 형성하는 공간 내에서 선회되는 방향 및 상기 캔의 중심을 기준으로 상기 플레이트 상에서 돌출되는 방향은, 상기 절개부의 형성위치 또는 상기 캡의 배치방향에 따라 달라지는 것을 특징으로 하는 음극판 용접 구조를 갖는 코인형 이차전지.The direction in which the second joining piece is pivoted in the space formed by the cutout and the direction of projecting on the plate with respect to the center of the can is different depending on the position at which the cutout is formed or the arrangement direction of the cap. Coin-type secondary battery having a negative electrode plate welding structure.
  9. 제 2 항에 있어서,The method of claim 2,
    상기 캔에 상기 캡이 결합되면, When the cap is coupled to the can,
    상기 제2접합편의 윗면 및 저면은 상기 캡의 저면 및 상기 전극체의 최상단에 배치된 음극판의 윗면과 각각 접촉되는 것을 특징으로 하는 음극판 용접 구조를 갖는 코인형 이차전지.The upper surface and the bottom surface of the second bonding piece is in contact with the bottom surface of the cap and the top surface of the negative electrode plate disposed on the top of the electrode body, respectively, the coin-type secondary battery having a negative electrode plate welding structure.
PCT/KR2015/010152 2014-11-06 2015-09-25 Coin type secondary battery having anode plate welding structure WO2016072618A1 (en)

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KR1020140153407A KR101690688B1 (en) 2014-11-06 2014-11-06 Coin type secondary battery having negative electrode plate welded structure

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