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WO2018043890A1 - Batterie secondaire - Google Patents

Batterie secondaire Download PDF

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Publication number
WO2018043890A1
WO2018043890A1 PCT/KR2017/006563 KR2017006563W WO2018043890A1 WO 2018043890 A1 WO2018043890 A1 WO 2018043890A1 KR 2017006563 W KR2017006563 W KR 2017006563W WO 2018043890 A1 WO2018043890 A1 WO 2018043890A1
Authority
WO
WIPO (PCT)
Prior art keywords
vent
plate
electrode
cap plate
area
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2017/006563
Other languages
English (en)
Korean (ko)
Inventor
김종호
김현석
박시동
이병익
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Samsung SDI Co Ltd
Original Assignee
Samsung SDI Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Samsung SDI Co Ltd filed Critical Samsung SDI Co Ltd
Publication of WO2018043890A1 publication Critical patent/WO2018043890A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/148—Lids or covers characterised by their shape
    • H01M50/154—Lid or cover comprising an axial bore for receiving a central current collector
    • 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
    • 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
    • H01M50/15—Lids or covers characterised by their shape for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/155—Lids or covers characterised by the material
    • 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
    • H01M50/30—Arrangements for facilitating escape of gases
    • 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
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/394—Gas-pervious parts or elements
    • 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
    • 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
    • H01M50/155—Lids or covers characterised by the material
    • H01M50/157—Inorganic material
    • H01M50/159—Metals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
    • H01M50/176—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • 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
    • 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
    • H01M50/564—Terminals characterised by their manufacturing process
    • H01M50/566—Terminals characterised by their manufacturing process by welding, soldering or brazing
    • 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 disclosure relates to a secondary battery having an electrode assembly embedded in an inner space set by a case and a cap plate, and including an insulating plate between the electrode assembly and the cap plate.
  • a rechargeable battery is a battery that repeatedly performs charging and discharging, unlike a primary battery.
  • Small capacity secondary batteries can be used in portable electronic devices such as mobile phones, notebook computers and camcorders, and large capacity secondary batteries can be used as power sources for driving motors of hybrid vehicles and electric vehicles.
  • the secondary battery may be installed in an electrode assembly for charging and discharging, a case accommodating the electrode assembly and the electrolyte, a cap plate coupled to the opening of the case, an insulation plate provided between the electrode assembly and the cap plate, and a cap plate. And an electrode terminal electrically connected to the electrode assembly via the insulating plate.
  • the cap plate includes a terminal hole for installing electrode terminals, an electrolyte injection hole for electrolyte injection, and a vent hole for discharging internal pressure. Vent plates are provided in the vent holes to close the vent holes. When the internal pressure reaches the set pressure, the vent plate is cut out of the notch to open the vent hole to lower the internal pressure.
  • Such a secondary battery considers discharge of internal pressure and gas during internal short-circuit, but when penetrating the conductive member, the insulation plate melts due to high temperature to block the vent hole, and thus, the safety of the battery is not considered to be deteriorated. .
  • Neighboring cells that are exposed to high temperatures to the heat transferred can be secondarily chain ignited by internal pressure. That is, the heat accumulated in the first cell may lead to ignition of the entire module.
  • An aspect of the present invention is to provide a secondary battery that improves safety by preventing clogging of a vent hole by an insulating plate, despite a high temperature generated during an internal short circuit.
  • a secondary battery includes an electrode assembly formed by disposing a first electrode and a second electrode on both sides of a separator, a case in which the electrode assembly is embedded, and a vent plate coupled to an opening of the case.
  • a cap plate having a vent hole to be formed, an electrode terminal electrically connected to the electrode assembly and installed in a terminal hole provided in the cap plate, and an insulating plate disposed between the electrode assembly and the cap plate.
  • the insulating plate forms a vent area with holes having an area smaller than that of the vent hole inside the vent hole.
  • the insulation plate may be formed of poly phenylene sulfide (PPS).
  • An area of the vent area may be larger than an area of the vent hole.
  • the vent region may form the holes in a lattice shape.
  • the insulating plate may include first protrusions protruding at a first height toward the cap plate from both sides of the cap plate in the longitudinal direction so as to be supported by the cap plate.
  • the insulating plate may include a second protrusion that protrudes to a second height lower than the first height in the vent region between the first protrusions to form the holes.
  • the second protrusion may be spaced apart from the cap plate at a predetermined interval.
  • the vent area is formed by holes having an area smaller than that of the vent hole in the insulating plate disposed between the electrode assembly and the cap plate, so that the hot gas is vented despite the high temperature generated during the internal short circuit.
  • Members eg, torn separators
  • torn separators separated from the electrode assembly while discharging into the holes in the area can be held in the vent area that is inside the insulating plate.
  • the members separated from the electrode assembly eg, the torn separator
  • the vent hole in the cap plate can be kept open.
  • the members (eg, the torn separator) separated from the electrode assembly may not be ejected to the outside through the vent hole, and propagation of the ignition to the neighboring cell during the internal short circuit may be prevented even in the module state. That is, even if the conductive member penetrates the secondary battery and generates a strong internal short circuit inside the secondary battery, safety of the secondary battery and the module can be ensured.
  • FIG. 1 is a perspective view of a rechargeable battery according to an exemplary embodiment of the present invention.
  • FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1.
  • FIG. 3 is a cross-sectional view taken along line III-III of FIG. 1.
  • FIG. 4 is a perspective view of an electrode assembly applied to FIG. 2.
  • FIG. 5 is a perspective view illustrating the electrode terminal connected to the electrode assembly of FIG. 4 and the insulation plate and the gasket disassembled.
  • FIG. 6 is a cross-sectional view showing a state before the internal short circuit of the vent hole and the vent area corresponding to each other.
  • FIG. 7 is a cross-sectional view illustrating a state after an internal short circuit of the vent hole and the vent region corresponding to each other.
  • FIG. 1 is a perspective view of a rechargeable battery according to an exemplary embodiment of the present invention
  • FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1
  • FIG. 3 is a cross-sectional view taken along line III-III of FIG. 1.
  • a secondary battery includes an electrode assembly 101 and 102 for charging and discharging a current, a case 30 in which the electrode assembly 101 and 102 are embedded, and a case 30.
  • a cap plate 40 coupled to the opening 31 of the cap 31 to seal the opening 31, and electrode terminals 51 and 52 electrically connected to the electrode assemblies 101 and 102.
  • the secondary battery of one embodiment further includes an insulating plate 20 installed between the electrode assemblies 101 and 102 and the cap plate 40.
  • the insulating plate 20 electrically insulates the electrode assemblies 101 and 102 from the cap plate 40 and the electrode terminals 51 and 52.
  • FIG. 4 is a perspective view of an electrode assembly applied to FIG. 2, and FIG. 5 is an exploded perspective view illustrating an electrode terminal connected to the electrode assembly of FIG. 4 and an insulation plate and a gasket disassembled.
  • the electrode assemblies 101 and 102 are formed on both sides of the separator 13, which is an electrical insulating material, and the first electrode 11 (eg, a cathode) and the second electrode 12 (eg, an anode). ), And formed by winding or laminating (not shown) the cathode 11, the separator 13, and the anode 12.
  • the electrode assemblies 101 and 102 are formed in pairs, but may be formed in a larger number.
  • the electrode assemblies 101 and 102 may be formed in a plate shape with both elliptical ends (top and bottom of FIG. 4) to be accommodated in the case 30.
  • the positive electrodes 11 and 12 are coated portions 111 and 121 coated with active materials on current collectors of metal foils (for example, Cu and Al foils), and non-coated portions of current collectors exposed without applying active materials. Forming tabs 112, 122.
  • the tabs 112, 122 are spaced apart from one another at one end of the wound or stacked electrode assembly 101, 102 and at a single winding range T of the electrode assembly 101, 102. That is, the tab 112 of the cathode 11 is disposed at one side of one end of the electrode assembly 101, 102, and the tab 122 of the anode 12 is disposed at a distance D from the same end of the electrode assembly 101, 102. Are spaced apart from each other.
  • the tab 112 of the negative electrode 11 is disposed on the left side at one end (top of FIG. 4) of the electrode assembly 101, 102, and the positive electrode ( The tab 122 of 12 is disposed on the right side at the same stage (top of FIG. 4) of the electrode assemblies 101, 102.
  • the tabs 112 and 122 of the negative and positive electrodes 11 and 12 are disposed on the cap plate 40 side and overlap each other to be electrically connected to each other.
  • the two electrode assemblies 101, 102 are arranged side by side and electrically connected in parallel.
  • the tab 112 of one cathode 11 is bent to face the tab 112 of the other cathode 11 and connected to each other at the first electrode terminal 51.
  • the tab 122 of the one positive electrode 12 is bent to face the tab 122 of the other positive electrode 12 and connected to the second electrode terminal 52.
  • the case 30 may include electrode assemblies 101 and 102 and an insulating plate 20 to form an appearance of a secondary battery and provide mechanical strength to the secondary battery.
  • the case 30 sets a space for accommodating the plate-shaped electrode assemblies 101 and 102.
  • the case 30 is formed in a substantially rectangular parallelepiped, and has a rectangular opening 31 at one side thereof to insert the electrode assemblies 101 and 102.
  • the insulating plate 20 includes tab holes 201 and 202 corresponding to the terminal holes H1 and H2. Accordingly, the tabs 112 and 122 of the electrode assemblies 101 and 102 accommodated in the case 30 are connected to the first and second electrode terminals 51 and 52 through the tab holes 201 and 202.
  • the insulating plate 20 allows the tabs 112 and 122 to be pulled out through the tab holes 201 and 202 while electrically insulating the electrode assemblies 101 and 102 and the cap plate 40.
  • the cap plate 40 is coupled to the opening 31 of the case 30 to seal the case 30 and includes two terminal holes H1 and H2.
  • the first and second electrode terminals 51 and 52 are provided in the terminal holes H1 and H2 and the tab holes 201 and 202.
  • the case 30 and the cap plate 40 may be made of aluminum and welded to each other at the opening 31.
  • the cap plate 40 further includes a vent hole 41 and an electrolyte injection hole 42.
  • the vent hole 41 is closed by the vent plate 411 to discharge the internal pressure caused by the gas generated inside the secondary battery by the charging and discharging action of the electrode assemblies 101 and 102.
  • vent plate 411 may be cut to open the vent hole 41 to discharge the gas and the internal pressure.
  • Vent plate 411 has a notch 412 leading to an incision.
  • the electrolyte injection hole 42 couples and welds the cap plate 40 to the case 30, and then injects the electrolyte into the case 30. After electrolyte injection, the electrolyte injection port 42 is sealed with a sealing stopper 421.
  • the insulating plate 20 has an internal electrolyte injection hole 28.
  • the internal electrolyte injection hole 28 may correspond to the electrolyte injection hole 42 provided in the cap plate 40 so that the electrolyte injected through the electrolyte injection hole 42 may be injected into the insulating plate 20.
  • the first and second electrode terminals 51 and 52 are connected to the tabs 112 and 122 of the electrode assemblies 101 and 102, respectively, to discharge current from the electrode assemblies 101 and 102, or 102) to charge the current.
  • the first and second electrode terminals 51 and 52 are installed through the terminal holes H1 and H2 of the cap plate 40 and the tabs passing through the tap holes 201 and 202 of the insulating plate 20. 112, 122 electrically. In this case, the tabs 112 and 122 are bent in parallel with the cap plate 40 and welded to the first and second electrode terminals 51 and 52.
  • the first and second electrode terminals 51 and 52 may have the same structure.
  • the first and second electrode terminals 51 and 52 include inner plates 511 and 521, pillar portions 512 and 522, and outer plates 513 and 523. .
  • the inner plates 511 and 521 are formed to be wider than the areas of the pillars 512 and 522 and are welded to the tabs 112 and 122 with a large area, and are located between the cap plate 40 and the insulating plate 20. At this time, the tabs 112, 112; 122, 122 in the two electrode assemblies 101 and 102 are bent to face each other and welded to the inner plates 511 and 521.
  • the pillars 512 and 522 are connected to the inner plates 511 and 521 and pass through the terminal holes H1 and H2 together with the gaskets 621 and 622 to protrude out of the cap plate 40.
  • the outer plates 513 and 523 are electrically connected to the column portions 512 and 522 at the outer surface of the cap plate 40.
  • the pillar portions 512, 522 are connected to the outer plates 513, 523 by caulking or welding.
  • the electrode assemblies 101 and 102 may be drawn out of the case 30 through the tabs 112 and 122 and the first and second electrode terminals 51 and 52.
  • the tabs 112 and 122 are directly connected to the first and second electrode terminals 51 and 52, the structure of drawing the electrode assemblies 101 and 102 out of the case 30 is simplified.
  • the gaskets 621 and 622 are interposed between the first and second electrode terminals 51 and 52 and the cap plate 40, so that the first and second electrode terminals 51 and 52 and the cap plate 40 are interposed therebetween. Is electrically insulated and sealed.
  • the gaskets 621 and 622 are disposed between the pillar portions 512 and 522 of the first and second electrode terminals 51 and 52 and the inner surfaces of the terminal holes H1 and H2 of the cap plate 40. Seals and electrically insulates between 512 and 522 and the terminal holes H1 and H2 of the cap plate 40.
  • the column portions 512 and 522 are inserted into the terminal holes H1 and H2 through the gaskets 621 and 622, and the coupling holes of the outer plates 513 and 523 are provided through the external insulating members 631 and 632. After inserting into the 514 and 524, the caulking or welding around the coupling hole 514 and 524, the pillar part 512 and 522 is fixed to the outer plate 513 and 523. As a result, the first and second electrode terminals 51 and 52 may be installed in the cap plate 40.
  • the insulating plate 20 includes a vent area VA having a plurality of holes H3 made of an area smaller than the area of the vent hole 41 inside the vent hole 41. Since the vent area VA corresponds to the vent hole 41 provided in the cap plate 40, the vent hole 41 receives an internal pressure that is increased by the hot gas generated in the electrode assemblies 101 and 102 due to an internal short circuit. To be discharged.
  • the holes H3 in the vent area VA are members separated from the electrode assemblies 101 and 102 while discharging the hot gas and the electrolyte even in the event of the high temperature generated during the internal short circuit of the secondary battery.
  • the torn separator 13 can be held inside the insulating plate 20.
  • the members separated from the electrode assemblies 101 and 102 eg, the torn separator 13
  • the vent area VA of the insulating plate 20 is kept open are vented area VA. Since the state held in the cap plate 40 can be maintained in the vent hole 41 in the open state.
  • the members separated from the electrode assemblies 101 and 102 may not be ejected to the outside through the vent hole 41. Propagation of ignition into the cell can be prevented.
  • the insulating plate 20 may be formed of polyphenylene sulfide (PPS), which is a flame retardant material. That is, the insulation plate 20 may maintain the vent area VA while discharging the hot gas generated during internal short circuit to the holes H3.
  • PPS polyphenylene sulfide
  • the area of the vent area VA is formed larger than the area of the vent hole 41. That is, since the vent area VA is formed to have a larger area than the vent hole 41, the hot gas discharged into the vent hole 41 from the inside of the insulating plate 20 is not blocked in the vent area VA.
  • the holes H3 of the vent area VA are formed to have a smaller area than the vent holes 41, so that the separator 13 separated from the electrode assemblies 101 and 102 blows toward the vent holes 41 during an internal short circuit. Can be prevented more effectively.
  • FIG. 6 is a cross-sectional view showing a state before the internal short-circuit of the vent hole and the vent area corresponding to each other
  • FIG. 7 is a cross-sectional view showing a state after the internal short-circuit of the vent hole and the vent area corresponding to each other.
  • the vent area VA may form the holes H3 in a lattice shape.
  • the first and second protrusions protruding toward the cap plate 40 from both sides of the cap plate 40 in the longitudinal direction (x-axis direction) of the insulating plate 20 to be supported by the cap plate 40 ( 21) (see FIGS. 3 and 5).
  • the insulating plate 20 protrudes from the vent area VA between the first protrusions 21 to the second height H20 lower than the first height H10 to form the holes H3. ). Since the second protrusion 22 has a second height H20 that is higher than other portions on the insulating plate 20, strength of the second protrusion 22 may be improved in the vent area VA.
  • the second protrusion 22 is spaced apart from the cap plate 40 at a predetermined interval G1 at the vent hole 41 side.
  • the separator 13 separated from the electrode assemblies 101 and 102 is filtered through the vent area VA (see FIG. 7).
  • the vent area VA of the insulating plate 20 may be raised to immediately contact the cap plate 40 while removing the gap G1. have.
  • the insulating plate 20 having the second protrusion 22 may not be melted in the vent area VA and may maintain the holes H3 in an open state. Therefore, the hot gas including the electrolyte and the internal pressure may be discharged through the holes H3 of the vent area VA and the vent hole 41 of the cap plate 40.
  • cap plate 41 vent hole
  • vent plate 412 notch
  • sealing stopper 511, 521 inner plate
  • H1 H2: Terminal hole H3: Hole H10: First height

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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)
  • Inorganic Chemistry (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

Une batterie secondaire selon un mode de réalisation de la présente invention comprend : un ensemble d'électrodes formé en disposant une première électrode et une seconde électrode sur les côtés d'un séparateur; un boîtier logeant l'ensemble électrodes; une plaque de capuchon couplée à une ouverture du boîtier et pourvue d'un trou d'évent auquel une plaque d'évent est installée; une borne d'électrode connectée électriquement à l'ensemble d'électrodes et installée sur un trou de borne disposé dans la plaque de capuchon; et une plaque d'isolation disposée entre l'ensemble d'électrodes et la plaque de capuchon, la plaque d'isolation formant une région d'évent à l'intérieur du trou d'évent, avec des trous ayant une surface inférieure à celle du trou d'évent.
PCT/KR2017/006563 2016-09-02 2017-06-22 Batterie secondaire Ceased WO2018043890A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020160113312A KR102260828B1 (ko) 2016-09-02 2016-09-02 이차 전지
KR10-2016-0113312 2016-09-02

Publications (1)

Publication Number Publication Date
WO2018043890A1 true WO2018043890A1 (fr) 2018-03-08

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PCT/KR2017/006563 Ceased WO2018043890A1 (fr) 2016-09-02 2017-06-22 Batterie secondaire

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KR (1) KR102260828B1 (fr)
WO (1) WO2018043890A1 (fr)

Cited By (6)

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WO2019093333A1 (fr) * 2017-11-07 2019-05-16 株式会社 東芝 Batterie et bloc-batterie
US20200091484A1 (en) * 2017-05-22 2020-03-19 Samsung Sdi Co., Ltd. Secondary battery
EP3694013A4 (fr) * 2018-12-29 2020-10-21 Contemporary Amperex Technology Co., Limited Batterie secondaire et module batterie
EP3772759A1 (fr) * 2019-08-07 2021-02-10 Jiangsu Contemporary Amperex Technology Limited Batterie secondaire et bloc-batterie
WO2024112837A1 (fr) * 2022-11-22 2024-05-30 Our Next Energy, Inc. Cellule à structure soudée externe
US12244025B2 (en) 2018-12-29 2025-03-04 Contemporary Amperex Technology (Hong Kong) Limited Secondary battery and battery module

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Publication number Priority date Publication date Assignee Title
JP7128666B2 (ja) * 2018-06-11 2022-08-31 Fdk株式会社 二次電池

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KR20160042244A (ko) * 2014-10-07 2016-04-19 삼성에스디아이 주식회사 이차 전지
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