WO2018004158A1 - Secondary battery module - Google Patents

Secondary battery module Download PDF

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Publication number
WO2018004158A1
WO2018004158A1 PCT/KR2017/006220 KR2017006220W WO2018004158A1 WO 2018004158 A1 WO2018004158 A1 WO 2018004158A1 KR 2017006220 W KR2017006220 W KR 2017006220W WO 2018004158 A1 WO2018004158 A1 WO 2018004158A1
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WO
WIPO (PCT)
Prior art keywords
vent
terminal
cap plate
plate
electrode
Prior art date
Application number
PCT/KR2017/006220
Other languages
French (fr)
Korean (ko)
Inventor
권민형
Original Assignee
삼성에스디아이 주식회사
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Filing date
Publication date
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Publication of WO2018004158A1 publication Critical patent/WO2018004158A1/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
    • H01M50/543—Terminals
    • H01M50/564—Terminals characterised by their manufacturing process
    • H01M50/567—Terminals characterised by their manufacturing process by fixing means, e.g. screws, rivets or bolts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • 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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted 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
    • H01M50/30—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
    • H01M50/342—Non-re-sealable arrangements
    • H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/505—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising a single busbar
    • 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
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/588—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries outside the batteries, e.g. incorrect connections of terminals or busbars
    • 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
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
    • H01M50/593—Spacers; Insulating plates
    • 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 disclosure relates to a secondary battery module for connecting a plurality of unit cells including a vent plate to a vent hole of a cap plate by a bus bar.
  • 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 used as a single cell as in a small electronic device, or may be used in a module state in which a plurality of unit cells are electrically connected as in a motor driving. That is, the secondary battery module includes a bus bar electrically connecting the plurality of unit cells and the unit cells.
  • the unit cells are configured to couple the gap plate to the opening of the case that houses the electrode assembly, and to provide a vent plate in the vent hole of the cap plate so that the vent plate may be cut open according to the internal pressure of the secondary battery to open the vent hole. have.
  • the unit cells are provided with a vent plate and a vent hole to ensure primary safety in each cell, and at the same time have an external short circuit to induce an external short in the overcharge mode to discharge the current charged in the electrode assembly to secure the secondary safety. have.
  • One embodiment of the present invention to provide a secondary battery module that simplifies the configuration to ensure the safety of the unit cells.
  • One embodiment of the present invention is to provide a secondary battery module that ensures the safety of the neighboring unit cells when the vent plate is cut in the unit cell to open the vent hole.
  • a secondary battery module includes an electrode assembly including a first electrode and a second electrode in a case, seals the opening of the case with a cap plate, and vents the vent hole of the cap plate.
  • a plurality of unit cells including a plate, a first electrode terminal connected to the first electrode passing through the cap plate, and electrically connecting the cap plate to the second electrode, and an outer side of the vent plate And a bus bar disposed at the breaker to disconnect electrical connections of the unit cells when the vent plate is cut.
  • the bus bar may electrically connect the cap plate and the first electrode terminal to the outside of the unit cells.
  • the bus bar may include a terminal connection part connected to the first electrode terminal of a first unit cell among the unit cells, and a second unit cell adjacent to the first unit cell, the outer side of the cap plate corresponding to the vent hole. It is connected to the surface, and includes a vent connection for disconnecting the electrical connection when the vent plate incision.
  • the vent connection part may include a first connection line electrically connected to the cap plate at an opposite surface of the vent plate at an outer surface of the cap plate corresponding to the vent hole.
  • the vent connection part may include a second connection line connected to the cap plate in an insulating structure at the vent connection part side at an outer surface of the cap plate corresponding to the vent hole.
  • the vent connection part may be provided between the first connection line and the second connection line, and may have a first notch that is cut when the vent plate is cut.
  • the first electrode may be electrically connected to the first electrode terminal through a first lead tab
  • the second electrode may be electrically connected to the cap plate through a second lead tab.
  • the unit cells may further include a second electrode terminal connected to the second electrode and penetrating the cap plate.
  • the second electrode terminal is a rivet terminal installed in the terminal hole of the cap plate, a flange formed integrally wide with the rivet terminal inside the cap plate, and disposed outside the cap plate is connected to the rivet terminal, It may include a plate terminal connected to the terminal connection portion of the bus bar.
  • the bus bar may further include a vent corresponding part corresponding to the vent hole of the first unit cell between the terminal connection part and the vent connection part.
  • the bus bar may include a second notch provided between the terminal connection part and the vent corresponding part to be cut when the vent plate of the first unit cell is cut.
  • a bus bar connecting unit cells is disposed outside the vent plate, and thus, when the vent plate is cut, the bus bar is broken to disconnect electrical units of neighboring unit cells, thereby simplifying safety of neighboring unit cells. Can be secured.
  • the venting connection part provided in the busbar is broken when the vent plate is cut in one unit cell (second unit cell) to open the vent hole, and is broken by the discharge pressure through the vent hole, so that the neighboring unit cell (first unit cell) Because the electrical connection of the disconnection can ensure the safety of the other unit cell (first unit cell) neighboring.
  • FIG. 1 is an exploded perspective view of a rechargeable battery module according to a first exemplary embodiment of the present invention.
  • FIG. 2 is a plan view illustrating the rechargeable battery module of FIG. 1.
  • FIG. 2 is a plan view illustrating the rechargeable battery module of FIG. 1.
  • FIG. 3 is a perspective view of a unit cell applied to FIG. 1.
  • FIG. 4 is a cross-sectional view taken along the line IV-IV of FIG. 3.
  • FIG. 5 is a partial perspective view of a state before and after the operation of the first notch provided in the bus bar of FIG.
  • FIG. 6 is an exploded perspective view of a rechargeable battery module according to a second exemplary embodiment of the present invention.
  • FIG. 7 is a plan view illustrating the secondary battery module of FIG. 6.
  • FIG. 8 is a perspective view of a unit cell applied to FIG. 6.
  • FIG. 9 is a cross-sectional view taken along the line VII-VII of FIG. 8.
  • FIG. 10 is a plan view illustrating a secondary battery module in accordance with a third embodiment of the present invention.
  • FIG. 1 is an exploded perspective view of a rechargeable battery module according to a first exemplary embodiment of the present invention
  • FIG. 2 is a plan view of the combined rechargeable battery module of FIG. 1.
  • the secondary battery module 1 of the first embodiment includes a plurality of unit cells 100 (for example, first and second unit cells 101 and 102) and first and second cells. It includes a bus bar 200 for electrically connecting the two unit cells (101, 102).
  • the first and second unit cells 101 and 102 are formed of secondary batteries and are disposed adjacent to each other in the first direction (x-axis direction), and electrically and mechanically connected to each other to form the secondary battery module 1.
  • the bus bar 200 is disposed above the secondary battery module 1 to electrically connect the first and second unit cells 101 and 102.
  • FIG. 3 is a perspective view of a unit cell applied to FIG. 1, and FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. 3.
  • the unit cell 100 is formed of a secondary battery that charges and discharges a current.
  • the first and second unit cells 101 and 102 are formed in the same structure, hereinafter, for convenience, the second unit cell 102 will be described as an example.
  • the second unit cell 102 includes an electrode assembly 10 for charging and discharging, a case 15 containing the electrode assembly 10, a cap plate 20 coupled to an opening of the case 15, and a cap plate ( A first electrode terminal (hereinafter referred to as " cathode terminal ") 21, which is provided at 20).
  • the electrode assembly 10 has a first electrode (hereinafter referred to as "cathode”) 11 and a second electrode (hereinafter referred to as “anode”) 12 on both sides of the separator 13 as an insulator. And the cathode 11, the separator 13, and the anode 12 are formed in a jellyroll state.
  • the negative electrode 11 and the positive electrode 12 each have coating portions 11a and 12a coated with an active material on a current collector of a thin metal plate, and uncoated portions 11b and 12b formed of an exposed current collector without applying an active material. Include.
  • the uncoated portion 11b of the cathode 11 is formed at one end of the cathode 11 to be wound.
  • the uncoated portion 12b of the anode 12 is formed at one end of the anode 12 to be wound. That is, um, the uncoated portions 11b and 12b of the anodes 11 and 12 are disposed at both ends of the electrode assembly 10, respectively.
  • the case 15 is formed of an approximately rectangular parallelepiped space to set a space for accommodating the electrode assembly 10 and the electrolyte therein, and forms an opening connecting the external and internal spaces on one surface of the rectangular parallelepiped. The opening allows insertion of the electrode assembly 10 into the case 15.
  • the cap plate 20 is installed in the opening of the case 15 to seal the opening.
  • the case 15 and the cap plate 20 may be made of aluminum and welded to each other.
  • the cap plate 20 includes an electrolyte injection hole 29, a vent hole 24, and a terminal hole H1.
  • the electrolyte injection hole 29 couples the cap plate 20 to the case 15, and then injects the electrolyte into the case 15. After the electrolyte injection, the electrolyte injection opening 29 is sealed with a sealing stopper 27.
  • vent hole 24 is closed by the vent plate 25 to discharge the internal pressure of the second unit cell 102.
  • the vent plate 25 is cut along the notch 25a to open the vent hole 24.
  • the negative electrode terminal 21 is installed in the terminal hole H1 of the cap plate 20 and is electrically connected to the electrode assembly 10. That is, the negative electrode terminal 21 is electrically connected to the negative electrode 11 of the electrode assembly 10 and drawn out of the case 15.
  • the cap plate 20 is electrically connected to the anode 12 of the electrode assembly 10. Accordingly, the cap plate 20 in the second unit cell 102 has a positive polarity and functions as a substantially positive terminal.
  • the negative terminal 21 has a rivet terminal 21a installed in the terminal hole H1 of the cap plate 20, a flange 21b integrally formed in the rivet terminal 21a inside the cap plate 20, and And a plate terminal 21c disposed outside the cap plate 20 and connected to the rivet terminal 21a by riveting or welding.
  • the negative electrode gasket 36 is provided between the rivet terminal 21a of the negative electrode terminal 21 and the inner surface of the terminal hole H1 to seal between the rivet terminal 21a of the negative electrode terminal 21 and the cap plate 20. And electrically insulate.
  • the negative electrode gasket 36 extends further between the flange 21b and the inner surface of the cap plate 20 to further seal and electrically insulate between the flange 21b and the cap plate 20. That is, the negative electrode gasket 36 prevents the electrolyte from leaking through the terminal hole H1 by providing the negative electrode terminal 21 in the cap plate 20.
  • the negative lead tabs 51 and 52 electrically connect the negative terminal 21 and the cap plate 20 to the negative and positive ends 11b and 12b of the electrode assembly 10, respectively. .
  • the negative lead tab 51 By coupling the negative lead tab 51 to the lower end of the rivet terminal 21a and caulking the lower end, the negative lead tab 51 is connected to the lower end of the rivet terminal 21a while being supported by the flange 21b.
  • the positive lead tab 52 is bent and welded to the inner surface of the cap plate 20 in a large area is electrically connected.
  • the negative electrode insulating member 61 is installed between the negative electrode lead tab 51 and the cap plate 20 to electrically insulate the negative electrode lead tab 51 and the cap plate 20.
  • the negative electrode insulating member 61 is coupled to the cap plate 20 on one side and surrounds the negative lead tab 51, the rivet terminal 21 a and the flange 21 b on the other side, the connection structure thereof is firmly stabilized. .
  • the plate terminal 21c of the negative electrode terminal 21 is electrically connected to the rivet terminal 21a and is disposed outside the cap plate 20 via the insulating member 31.
  • the insulating member 31 electrically insulates the plate terminal 21c from the cap plate 20.
  • FIG. 5 is a partial perspective view of a state before and after the operation of the first notch provided in the bus bar of FIG. 1, 2 and 5, the bus bar 200 is disposed outside the vent plate 25, so that when the vent plate 25 is cut, the first unit cell 101 and the second unit cell ( 102) is configured to break the electrical connection.
  • the bus bar 200 is configured to electrically connect the cap plate 20 having the polarity and the cathode terminal 21 to the outside of the first and second unit cells 101 and 102.
  • a series connection of unit cells 100 is illustrated.
  • the bus bar 200 may include a terminal connector 210 and a venting connector 220.
  • the terminal connector 210 is connected to the first electrode terminal (cathode terminal 21) of the first unit cell 101 among the unit cells 100.
  • the terminal connection unit 210 may be connected to the plate terminal 21c of the negative electrode terminal 21 by welding.
  • the vent connection portion 220 is connected to the outer surface of the cap plate 20 in correspondence with the vent hole 24 in the second unit cell 102 adjacent to the first unit cell 101, and the vent plate 25. It is formed to cut off the electrical connection at the time of incision.
  • the terminal connection portion 210 is bent to have a height difference in the z-axis direction. Can be formed.
  • the terminal connecting portion 210 is formed at a lower side of the venting connecting portion 220 and higher at the negative terminal 21 side, so that the height between the negative terminal 21 and the cap plate 20 is high. You can overcome the differences.
  • the vent connection 220 has a first connection line 221 electrically connected to the cap plate 20.
  • the first connection line 221 may be formed as a welding line on the opposite side of the vent connecting portion 220 on the outer surface of the cap plate 20 corresponding to the vent hole 24. Therefore, the vent connecting part 220 is electrically connected to the cap plate 20 through the first connection line 221.
  • the vent connection 220 has a second connection line 222 that is electrically connected to the cap plate 20.
  • the second connection line 222 may be formed as an adhesive line on the vent connection portion 220 side at the outer surface of the cap plate 20 corresponding to the vent hole 24. Therefore, the vent connection 220 is electrically insulated from the cap plate 20 by the second connection line 222.
  • the vent connection part 220 includes a first notch 223 (solid line state of FIG. 5) between the first connection line 221 and the second connection line 222, so that the vent hole 25 may be opened when the vent plate 25 is cut. It is cut through the first notch 223 by the discharge pressure through the 24. Since the first notch 223 is cut (a virtual line state of FIG. 5), the vent connection part 220 is separated into the first connection line 221 and the second connection line 222.
  • venting connection part 220 of the bus bar 200 is broken at the first notch 223, the cap plate 20 and the second connection line of the second unit cell 102 on the first connection line 221 side are broken.
  • the negative terminal 21 of the first unit cell 101 on the (222) side is electrically disconnected from each other. That is, the second unit cell 102 secures primary safety.
  • the vent plate 25 when the vent plate 25 is cut in the second unit cell 102, the electrical connection between the neighboring first and second unit cells 101 and 102 is cut off, and thus the neighboring vent plate 25 is not cut out.
  • Safety of the unit cells 101 may be secured.
  • the first unit cell 101 may further secure secondary safety.
  • FIG. 6 is an exploded perspective view of a rechargeable battery module according to a second exemplary embodiment of the present invention
  • FIG. 7 is a plan view illustrating a secondary battery module of FIG. 6
  • FIG. 8 is a perspective view of a unit cell applied to FIG. 9 is a cross-sectional view taken along the line VII-VII of FIG. 8.
  • the unit cells 300 may have a second electrode terminal (hereinafter, referred to as a “positive electrode terminal”). 22).
  • the positive terminal 22 has the same structure as the negative terminal 21 and is provided to the rivet terminal 22a installed in the terminal hole H2 of the cap plate 20 and to the rivet terminal 22a from the inside of the cap plate 20.
  • the positive electrode gasket 37 is provided between the rivet terminal 22a of the positive electrode terminal 22 and the inner surface of the terminal hole H2 to seal between the rivet terminal 22a of the positive electrode terminal 22 and the cap plate 20. And electrically insulate.
  • the anode gasket 37 extends further between the flange 22b and the inner surface of the cap plate 20 to further seal and electrically insulate between the flange 22b and the cap plate 20. That is, the positive electrode gasket 37 prevents the electrolyte from leaking through the terminal hole H2 by providing the positive electrode terminal 22 in the cap plate 20.
  • the positive lead tab 52 electrically connects the positive terminal 22 to the positive electrode 12 uncoated portion 12b of the electrode assembly 10. That is, the positive lead tab 52 is coupled to the lower end of the rivet terminal 22a to caulk the lower end so that the positive lead tab 52 is connected to the lower end of the rivet terminal 22a while being supported by the flange 22b. .
  • the positive electrode insulating member 62 is provided between the positive electrode lead tab 52 and the cap plate 20 to electrically insulate the positive electrode lead tab 52 and the cap plate 20.
  • the anode insulation member 62 is coupled to the cap plate 20 on one side and surrounds the anode lead tab 52, the rivet terminal 22a and the flange 22b on the other side, the connection structure thereof is firmly stabilized. .
  • the top plate 46 on the positive terminal 22 side electrically connects the plate terminal 22c and the cap plate 20 of the positive terminal 22.
  • the top plate 46 is interposed between the plate terminal 22c and the cap plate 20 and penetrates the rivet terminal 22a.
  • the top plate 46 and the plate terminal 22c are coupled to the top of the rivet terminal 22a to caulk the top, so that the top plate 46 and the plate terminal 22c are coupled to the top of the rivet terminal 22a.
  • the plate terminal 22c is installed outside the cap plate 20 with the top plate 46 interposed therebetween.
  • the anode gasket 37 is further extended between the rivet terminal 22a and the top plate 46. That is, the anode gasket 37 prevents the rivet terminal 22a and the top plate 46 from being electrically connected directly. That is, the rivet terminal 22a is electrically connected to the top plate 46 through the plate terminal 22c.
  • the bus bar 400 may include a terminal connection part 410 and a vent connection part 220.
  • the terminal connection part 410 is connected to the first electrode terminal (cathode terminal 21) of the first unit cell 301 of the unit cells 300.
  • the terminal connection part 410 may be welded to the plate terminal 21c of the negative electrode terminal 21.
  • the negative terminal 21 is provided in the first and second unit cells 101 and 102 to electrically connect the negative terminal 21 to the cap plate 20 through the busbar 200, the series connection is performed. To facilitate.
  • the first and second unit cells 301 and 302 are provided with negative and positive terminals 21 and 22, and the negative terminal 21 or the positive terminal 22 is connected to the bus bar 400. Is electrically connected to the cap plate 20 to facilitate series connection or parallel connection.
  • the bus bar 500 includes a terminal connection part 510, a venting connection part 220, and a vent corresponding part 530.
  • the vent corresponding part 530 is disposed between the terminal connection part 510 and the venting connection part 220 to correspond to the vent hole 24 of the first unit cell 101.
  • the bus bar 500 includes a second notch 540 between the terminal connection part 510 and the vent counterpart 530.
  • the second notch 540 is cut when the discharge pressure through the vent hole 24 acts on the vent counterpart 530 when the vent plate 25 is cut in the first unit cell 101.
  • the electrical connection of the cells 101 and 102 may be broken.
  • the negative terminal 21 of the first unit cell 101 of the terminal connecting part 510 corresponds to the vent.
  • the cap plate 20 of the second unit cell 102 on the side of the unit 530 is electrically disconnected from each other.
  • the second notch 540 is broken according to the operation of the vent counterpart 530, so that the electrical connection of the neighboring first and second unit cells 101 and 102 is cut off, so that the neighboring vent plate 25 is incised. Safety of the second unit cells 102 that are not yet secured may be secured.
  • vent plate 27 sealing stopper
  • terminal connection 220 venting connection
  • first connection line 222 second connection line
  • first notch 530 vent counterpart

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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)
  • Gas Exhaust Devices For Batteries (AREA)

Abstract

A secondary battery module according to an embodiment of the present invention comprises: a plurality of unit cells in which an electrode assembly having a first electrode and a second electrode is provided in a case, an opening in the case is sealed with a cap plate, a vent plate is provided to a vent hole in the cap plate, a first electrode terminal connected to the first electrode is penetratingly installed in the cap plate, and which electrically connect the cap plate to the second electrode; and a busbar disposed outside the vent plate and electrically disconnecting the unit cells when the vent plate is cut.

Description

이차 전지 모듈Secondary battery module
본 기재는 캡 플레이트의 벤트 홀에 벤트 플레이트를 구비하는 복수의 단위 셀들을 버스바로 연결하는 이차 전지 모듈에 관한 것이다.The present disclosure relates to a secondary battery module for connecting a plurality of unit cells including a vent plate to a vent hole of a cap plate by a bus bar.
이차 전지(rechargeable battery)는 일차 전지와 달리 충전 및 방전을 반복적으로 수행하는 전지이다. 소용량의 이차 전지는 휴대폰이나 노트북 컴퓨터 및 캠코더와 같이 휴대가 가능한 소형 전자기기에 사용되고, 대용량 이차 전지는 하이브리드 자동차 및 전기 자동차의 모터 구동용 전원으로 사용될 수 있다.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.
이차 전지는 소형 전자기기에서와 같이 단일 셀로 사용되거나, 모터 구동용에서와 같이 복수의 단위 셀들을 전기적으로 연결한 모듈 상태로 사용될 수 있다. 즉 이차 전지 모듈은 복수의 단위 셀들과 단위 셀들을 전기적으로 연결하는 버스바(bus bar)를 포함한다.The secondary battery may be used as a single cell as in a small electronic device, or may be used in a module state in which a plurality of unit cells are electrically connected as in a motor driving. That is, the secondary battery module includes a bus bar electrically connecting the plurality of unit cells and the unit cells.
단위 셀들은 전극 조립체를 내장하는 케이스의 개구에 갭 플레이트를 결합하고, 캡 플레이트의 벤트 홀에 벤트 플레이트를 구비하여 이차 전지의 내부 압력에 따라 벤트 플레이트가 절개되어 벤트 홀을 개방할 수 있도록 구성되어 있다.The unit cells are configured to couple the gap plate to the opening of the case that houses the electrode assembly, and to provide a vent plate in the vent hole of the cap plate so that the vent plate may be cut open according to the internal pressure of the secondary battery to open the vent hole. have.
단위 셀들은 벤트 플레이트와 벤트 홀을 구비하여 각 셀에서 1차 안전성을 확보하면서, 동시에 외부 단락부를 구비하여 과충전 모드에서 외부 단락을 유도함으로써 전극 조립체에 충전된 전류를 방전하여 2차 안전성을 확보하고 있다.The unit cells are provided with a vent plate and a vent hole to ensure primary safety in each cell, and at the same time have an external short circuit to induce an external short in the overcharge mode to discharge the current charged in the electrode assembly to secure the secondary safety. have.
본 발명의 일 실시예는 단위 셀들의 안전성을 확보하는 구성을 단순하게 하는 이차 전지 모듈을 제공하는 것이다. One embodiment of the present invention to provide a secondary battery module that simplifies the configuration to ensure the safety of the unit cells.
본 발명의 일 실시예는 단위 셀에서 벤트 플레이트가 절개되어 벤트 홀을 개방할 때, 이웃하는 다른 단위 셀들의 안전성을 확보하는 이차 전지 모듈을 제공하는 것이다.One embodiment of the present invention is to provide a secondary battery module that ensures the safety of the neighboring unit cells when the vent plate is cut in the unit cell to open the vent hole.
본 발명의 일 실시예에 따른 이차 전지 모듈은, 제1전극과 제2전극을 구비하는 전극 조립체를 케이스에 내장하고, 상기 케이스의 개구를 캡 플레이트로 밀폐하며, 상기 캡 플레이트의 벤트 홀에 벤트 플레이트를 구비하고, 상기 제1전극에 연결되는 제1전극단자를 상기 캡 플레이트에 관통하여 설치하며, 상기 캡 플레이트를 상기 제2전극에 전기적으로 연결하는 복수의 단위 셀들, 및 상기 벤트 플레이트의 외측에 배치되어 상기 벤트 플레이트 절개시 상기 단위 셀들의 전기적인 연결을 끊어주는 버스바를 포함한다.A secondary battery module according to an embodiment of the present invention includes an electrode assembly including a first electrode and a second electrode in a case, seals the opening of the case with a cap plate, and vents the vent hole of the cap plate. A plurality of unit cells including a plate, a first electrode terminal connected to the first electrode passing through the cap plate, and electrically connecting the cap plate to the second electrode, and an outer side of the vent plate And a bus bar disposed at the breaker to disconnect electrical connections of the unit cells when the vent plate is cut.
상기 버스바는 상기 단위 셀들의 외부에서 상기 캡 플레이트와 상기 제1전극단자를 전기적으로 연결할 수 있다. The bus bar may electrically connect the cap plate and the first electrode terminal to the outside of the unit cells.
상기 버스바는 상기 단위 셀들 중 제1단위 셀의 상기 제1전극단자에 연결되는 단자 연결부, 및 상기 제1단위 셀에 이웃하는 제2단위 셀에서, 상기 벤트 홀에 대응하여 상기 캡 플레이트의 외표면에 연결되며, 상기 벤트 플레이트 절개시 전기적 연결을 끊어주는 벤팅 연결부를 포함한다.The bus bar may include a terminal connection part connected to the first electrode terminal of a first unit cell among the unit cells, and a second unit cell adjacent to the first unit cell, the outer side of the cap plate corresponding to the vent hole. It is connected to the surface, and includes a vent connection for disconnecting the electrical connection when the vent plate incision.
상기 벤팅 연결부는 상기 벤트 홀에 대응하는 상기 캡 플레이트의 외표면에서 상기 벤팅 연결부의 반대측에서 상기 캡 플레이트에 전기적으로 연결되는 제1연결 라인을 포함할 수 있다.The vent connection part may include a first connection line electrically connected to the cap plate at an opposite surface of the vent plate at an outer surface of the cap plate corresponding to the vent hole.
상기 벤팅 연결부는 상기 벤트 홀에 대응하는 상기 캡 플레이트의 외표면에서 상기 벤팅 연결부 측에서 상기 캡 플레이트에 절연 구조로 연결되는 제2연결 라인을 포함할 수 있다.The vent connection part may include a second connection line connected to the cap plate in an insulating structure at the vent connection part side at an outer surface of the cap plate corresponding to the vent hole.
상기 벤팅 연결부는 상기 제1연결 라인과 상기 제2연결 라인 사이에 구비되어, 상기 벤트 플레이트 절개시 절개되는 제1노치를 구비할 수 있다.The vent connection part may be provided between the first connection line and the second connection line, and may have a first notch that is cut when the vent plate is cut.
상기 제1전극은 제1리드 탭으로 상기 제1전극단자에 전기적으로 연결되고, 상기 제2전극은 제2리드 탭으로 상기 캡 플레이트에 전기적으로 연결될 수 있다.The first electrode may be electrically connected to the first electrode terminal through a first lead tab, and the second electrode may be electrically connected to the cap plate through a second lead tab.
상기 단위 셀들은 상기 제2전극에 연결되어 상기 캡 플레이트에 관통하여 설치되는 제2전극단자를 더 포함할 수 있다.The unit cells may further include a second electrode terminal connected to the second electrode and penetrating the cap plate.
상기 제2전극단자는 상기 캡 플레이트의 단자홀에 설치되는 리벳 터미널, 상기 캡 플레이트의 내측에서 상기 리벳 터미널에 일체로 넓게 형성되는 플랜지, 및 상기 캡 플레이트의 외측에 배치되어 상기 리벳 터미널에 연결되고, 상기 버스바의 상기 단자 연결부에 연결되는 플레이트 터미널을 포함할 수 있다.The second electrode terminal is a rivet terminal installed in the terminal hole of the cap plate, a flange formed integrally wide with the rivet terminal inside the cap plate, and disposed outside the cap plate is connected to the rivet terminal, It may include a plate terminal connected to the terminal connection portion of the bus bar.
상기 버스바는 상기 단자 연결부와 상기 벤팅 연결부 사이에서 상기 제1단위 셀의 벤트 홀에 대응하는 벤트 대응부를 더 포함할 수 있다.The bus bar may further include a vent corresponding part corresponding to the vent hole of the first unit cell between the terminal connection part and the vent connection part.
상기 버스바는 상기 단자 연결부와 상기 벤트 대응부 사이에 구비되어 상기 제1단위 셀의 벤트 플레이트 절개시 절개되는 제2노치를 포함할 수 있다.The bus bar may include a second notch provided between the terminal connection part and the vent corresponding part to be cut when the vent plate of the first unit cell is cut.
본 발명의 일 실시예는 단위 셀들을 연결하는 버스바를 벤트 플레이트의 외측에 배치하여, 벤트 플레이트 절개시 버스바가 파단되어 이웃하는 단위 셀들의 전기적인 연결을 끊으므로 단순한 구성으로 이웃하는 단위 셀들의 안전성을 확보할 수 있다.According to an embodiment of the present invention, a bus bar connecting unit cells is disposed outside the vent plate, and thus, when the vent plate is cut, the bus bar is broken to disconnect electrical units of neighboring unit cells, thereby simplifying safety of neighboring unit cells. Can be secured.
버스바에 구비되는 벤팅 연결부는 일측 단위 셀(제2단위 셀)에서 벤트 플레이트가 절개되어 벤트 홀을 개방할 때, 벤트 홀을 통한 토출 압력으로 파단되어 이웃하는 다른 단위 셀(제1단위 셀)과의 전기적인 연결을 끊어주므로 이웃하는 다른 단위 셀(제1단위 셀)의 안전성을 확보할 수 있다.The venting connection part provided in the busbar is broken when the vent plate is cut in one unit cell (second unit cell) to open the vent hole, and is broken by the discharge pressure through the vent hole, so that the neighboring unit cell (first unit cell) Because the electrical connection of the disconnection can ensure the safety of the other unit cell (first unit cell) neighboring.
도 1은 본 발명의 제1실시예에 따른 이차 전지 모듈을 분해한 사시도이다.1 is an exploded perspective view of a rechargeable battery module according to a first exemplary embodiment of the present invention.
도 2는 도 1의 이차 전지 모듈을 결합한 평면도이다.FIG. 2 is a plan view illustrating the rechargeable battery module of FIG. 1. FIG.
도 3은 도 1에 적용되는 단위 셀의 사시도이다.3 is a perspective view of a unit cell applied to FIG. 1.
도 4는 도 3의 Ⅳ-Ⅳ 선을 따라 자른 단면도이다.4 is a cross-sectional view taken along the line IV-IV of FIG. 3.
도 5는 도 2의 버스바에 구비된 제1노치의 작동 전후 상태의 부분 사시도이다.5 is a partial perspective view of a state before and after the operation of the first notch provided in the bus bar of FIG.
도 6은 본 발명의 제2실시예에 따른 이차 전지 모듈을 분해한 사시도이다.6 is an exploded perspective view of a rechargeable battery module according to a second exemplary embodiment of the present invention.
도 7은 도 6의 이차 전지 모듈을 결합한 평면도이다.FIG. 7 is a plan view illustrating the secondary battery module of FIG. 6.
도 8은 도 6에 적용되는 단위 셀의 사시도이다.8 is a perspective view of a unit cell applied to FIG. 6.
도 9는 도 8의 Ⅸ-Ⅸ 선을 따라 자른 단면도이다.9 is a cross-sectional view taken along the line VII-VII of FIG. 8.
도 10은 본 발명의 제3실시예에 따른 이차 전지 모듈을 결합한 평면도이다.10 is a plan view illustrating a secondary battery module in accordance with a third embodiment of the present invention.
이하, 첨부한 도면을 참고로 하여 본 발명의 실시예에 대하여 본 발명이 속하는 기술 분야에서 통상의 지식을 가진 자가 용이하게 실시할 수 있도록 상세히 설명한다. 본 발명은 여러 가지 상이한 형태로 구현될 수 있으며 여기에서 설명하는 실시예에 한정되지 않는다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.
본 발명을 명확하게 설명하기 위해서 설명과 관계없는 부분은 생략하였으며, 명세서 전체를 통하여 동일 또는 유사한 구성요소에 대해서는 동일한 참조 부호를 붙이도록 한다.In order to clearly describe the present invention, parts irrelevant to the description are omitted, and like reference numerals designate like elements throughout the specification.
또한, 도면에서 나타난 각 구성의 크기 및 두께는 설명의 편의를 위해 임의로 나타내었으므로, 본 발명이 반드시 도시된 바에 한정되지 않는다.In addition, since the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of description, the present invention is not necessarily limited to the illustrated.
명세서 전체에서, 어떤 부분이 다른 부분과 "연결"되어 있다고 할 때, 이는 "직접적으로 연결"되어 있는 경우뿐 만 아니라, 다른 부재를 사이에 두고 "간접적으로 연결"된 것도 포함한다. 또한, 어떤 부분이 어떤 구성요소를 "포함" 한다고 할 때, 이는 특별히 반대되는 기재가 없는 한 다른 구성요소를 제외하는 것이 아니라 다른 구성요소를 더 포함할 수 있는 것을 의미한다.Throughout the specification, when a part is "connected" to another part, it includes not only "directly connected", but also "indirectly connected" between other members. In addition, when a part is said to "include" a certain component, which means that it may further include other components, except to exclude other components unless otherwise stated.
도 1은 본 발명의 제1실시예에 따른 이차 전지 모듈을 분해한 사시도이고, 도 2는 도 1의 이차 전지 모듈을 결합한 평면도이다. 도 1 및 도 2를 참조하면, 제1실시예의 이차 전지 모듈(1)은 복수의 단위 셀들(100)(예를 들면, 제1, 제2단위 셀(101, 102)) 및 제1, 제2단위 셀(101, 102)을 전기적으로 연결하는 버스바(200)를 포함한다.1 is an exploded perspective view of a rechargeable battery module according to a first exemplary embodiment of the present invention, and FIG. 2 is a plan view of the combined rechargeable battery module of FIG. 1. 1 and 2, the secondary battery module 1 of the first embodiment includes a plurality of unit cells 100 (for example, first and second unit cells 101 and 102) and first and second cells. It includes a bus bar 200 for electrically connecting the two unit cells (101, 102).
제1, 제2단위 셀들(101, 102)은 이차 전지로 이루어져 제1방향(x축 방향)으로 이웃하여 배치되고, 전기적 및 기구적으로 서로 연결되어 이차 전지 모듈(1)을 형성한다. 버스바(200)는 이차 전지 모듈(1)의 상방에 배치되어 제1, 제2단위 셀들(101, 102)을 전기적으로 연결한다.The first and second unit cells 101 and 102 are formed of secondary batteries and are disposed adjacent to each other in the first direction (x-axis direction), and electrically and mechanically connected to each other to form the secondary battery module 1. The bus bar 200 is disposed above the secondary battery module 1 to electrically connect the first and second unit cells 101 and 102.
도 3은 도 1에 적용되는 단위 셀의 사시도이고, 도 4는 도 3의 Ⅳ-Ⅳ 선을 따라 자른 단면도이다. 도 3 및 도 4를 참조하면, 단위 셀(100)은 전류를 충전 및 방전하는 이차 전지로 형성된다. 제1, 제2단위 셀(101, 102)은 동일 구조로 형성되며, 이하에서, 편의상 제2단위 셀(102)을 예로 들어 설명한다.3 is a perspective view of a unit cell applied to FIG. 1, and FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. 3. 3 and 4, the unit cell 100 is formed of a secondary battery that charges and discharges a current. The first and second unit cells 101 and 102 are formed in the same structure, hereinafter, for convenience, the second unit cell 102 will be described as an example.
제2단위 셀(102)은 충, 방전 작용하는 전극 조립체(10), 전극 조립체(10)를 내장하는 케이스(15), 케이스(15)의 개구에 결합되는 캡 플레이트(20), 캡 플레이트(20)에 설치되는 제1전극단자(이하 "음극 단자"라 한다)(21)를 포함한다.The second unit cell 102 includes an electrode assembly 10 for charging and discharging, a case 15 containing the electrode assembly 10, a cap plate 20 coupled to an opening of the case 15, and a cap plate ( A first electrode terminal (hereinafter referred to as " cathode terminal ") 21, which is provided at 20).
예를 들면, 전극 조립체(10)는 절연체인 세퍼레이터(13)의 양면에 제1전극(이하, "음극"이라 한다)(11)과 제2전극(이하, "양극"이라 한다)(12)을 배치하고, 음극(11), 세퍼레이터(13) 및 양극(12)을 젤리롤 상태로 귄취하여 형성된다.For example, the electrode assembly 10 has a first electrode (hereinafter referred to as "cathode") 11 and a second electrode (hereinafter referred to as "anode") 12 on both sides of the separator 13 as an insulator. And the cathode 11, the separator 13, and the anode 12 are formed in a jellyroll state.
음극(11) 및 양극(12)은 각각 금속 박판의 집전체에 활물질을 도포한 코팅부(11a, 12a), 및 활물질을 도포하지 않아서 노출된 집전체로 형성되는 무지부(11b, 12b)를 포함한다.The negative electrode 11 and the positive electrode 12 each have coating portions 11a and 12a coated with an active material on a current collector of a thin metal plate, and uncoated portions 11b and 12b formed of an exposed current collector without applying an active material. Include.
음극(11)의 무지부(11b)는 권취되는 음극(11)의 한 쪽 단부에 형성된다. 양극(12)의 무지부(12b)는 권취되는 양극(12)의 한 쪽 단부에 형성된다. 즉 음, 양극(11, 12)의 무지부들(11b, 12b)은 전극 조립체(10)의 양단에 각각 배치된다.The uncoated portion 11b of the cathode 11 is formed at one end of the cathode 11 to be wound. The uncoated portion 12b of the anode 12 is formed at one end of the anode 12 to be wound. That is, um, the uncoated portions 11b and 12b of the anodes 11 and 12 are disposed at both ends of the electrode assembly 10, respectively.
예를 들면, 케이스(15)는 내부에 전극 조립체(10)와 전해액을 수용하는 공간을 설정하도록 대략 직육면체 공간으로 이루어지며, 외부와 내부 공간을 연결하는 개구를 직육면체의 일면에 형성한다. 개구는 전극 조립체(10)를 케이스(15)의 내부로 삽입할 수 있게 한다.For example, the case 15 is formed of an approximately rectangular parallelepiped space to set a space for accommodating the electrode assembly 10 and the electrolyte therein, and forms an opening connecting the external and internal spaces on one surface of the rectangular parallelepiped. The opening allows insertion of the electrode assembly 10 into the case 15.
캡 플레이트(20)는 케이스(15)의 개구에 설치되어 개구를 밀폐한다. 예를 들면, 케이스(15)와 캡 플레이트(20)는 알루미늄으로 형성되어 서로 용접될 수 있다.The cap plate 20 is installed in the opening of the case 15 to seal the opening. For example, the case 15 and the cap plate 20 may be made of aluminum and welded to each other.
또한, 캡 플레이트(20)는 전해액 주입구(29)와 벤트 홀(24) 및 단자홀(H1)을 구비한다. 전해액 주입구(29)는 케이스(15)에 캡 플레이트(20)를 결합한 후, 케이스(15)의 내부로 전해액을 주입할 수 있게 한다. 전해액 주입 후, 전해액 주입구(29)는 밀봉 마개(27)로 밀봉된다.In addition, the cap plate 20 includes an electrolyte injection hole 29, a vent hole 24, and a terminal hole H1. The electrolyte injection hole 29 couples the cap plate 20 to the case 15, and then injects the electrolyte into the case 15. After the electrolyte injection, the electrolyte injection opening 29 is sealed with a sealing stopper 27.
벤트 홀(24)은 제2단위 셀(102)의 내부 압력을 배출할 수 있도록 벤트 플레이트(25)로 밀폐된다. 제2단위 셀(102)의 내부 압력이 설정 압력에 이르면, 벤트 플레이트(25)가 노치(25a)를 따라 절개되어, 벤트 홀(24)을 개방한다.The vent hole 24 is closed by the vent plate 25 to discharge the internal pressure of the second unit cell 102. When the internal pressure of the second unit cell 102 reaches the set pressure, the vent plate 25 is cut along the notch 25a to open the vent hole 24.
음극 단자(21)는 캡 플레이트(20)의 단자홀(H1)에 설치되고 전극 조립체(10)에 전기적으로 연결된다. 즉 음극 단자(21)는 전극 조립체(10)의 음극(11)에 전기적으로 연결되어 케이스(15)의 외부로 인출된다.The negative electrode terminal 21 is installed in the terminal hole H1 of the cap plate 20 and is electrically connected to the electrode assembly 10. That is, the negative electrode terminal 21 is electrically connected to the negative electrode 11 of the electrode assembly 10 and drawn out of the case 15.
그리고 캡 플레이트(20)는 전극 조립체(10)의 양극(12)에 전기적으로 연결된다. 따라서 제2단위 셀(102)에서 캡 플레이트(20)는 양극성을 가지고 실질적인 양극 단자로 작용한다.The cap plate 20 is electrically connected to the anode 12 of the electrode assembly 10. Accordingly, the cap plate 20 in the second unit cell 102 has a positive polarity and functions as a substantially positive terminal.
음극 단자(21)는 캡 플레이트(20)의 단자홀(H1)에 설치되는 리벳 터미널(21a), 캡 플레이트(20)의 내측에서 리벳 터미널(21a)에 일체로 넓게 형성되는 플랜지(21b), 및 캡 플레이트(20)의 외측에 배치되어 리벳 터미널(21a)에 리벳팅 또는 용접으로 연결되는 플레이트 터미널(21c)을 포함한다.The negative terminal 21 has a rivet terminal 21a installed in the terminal hole H1 of the cap plate 20, a flange 21b integrally formed in the rivet terminal 21a inside the cap plate 20, and And a plate terminal 21c disposed outside the cap plate 20 and connected to the rivet terminal 21a by riveting or welding.
음극 개스킷(36)은 음극 단자(21)의 리벳 터미널(21a)과 단자홀(H1)의 내면 사이에 설치되어, 음극 단자(21)의 리벳 터미널(21a)과 캡 플레이트(20) 사이를 실링하고 전기적으로 절연한다.The negative electrode gasket 36 is provided between the rivet terminal 21a of the negative electrode terminal 21 and the inner surface of the terminal hole H1 to seal between the rivet terminal 21a of the negative electrode terminal 21 and the cap plate 20. And electrically insulate.
음극 개스킷(36)은 플랜지(21b)와 캡 플레이트(20)의 내면 사이에 더 연장 설치되어, 플랜지(21b)와 캡 플레이트(20) 사이를 더 실링하고 전기적으로 절연한다. 즉 음극 개스킷(36)은 캡 플레이트(20)에 음극 단자(21)를 설치함으로써 단자홀(H1)을 통하여 전해액이 새는 것(leak)을 방지한다.The negative electrode gasket 36 extends further between the flange 21b and the inner surface of the cap plate 20 to further seal and electrically insulate between the flange 21b and the cap plate 20. That is, the negative electrode gasket 36 prevents the electrolyte from leaking through the terminal hole H1 by providing the negative electrode terminal 21 in the cap plate 20.
음, 양극 리드 탭(51, 52)은 음극 단자(21)와 캡 플레이트(20)를 전극 조립체(10)의 음, 양극(11, 12) 무지부(11b, 12b)에 각각 전기적으로 연결한다. 음극 리드 탭(51)을 리벳 터미널(21a)의 하단에 결합하여 하단을 코킹(caulking)함으로써, 음극 리드 탭(51)은 플랜지(21b)에 지지되면서 리벳 터미널(21a)의 하단에 연결된다. 그리고 양극 리드 탭(52)은 절곡되어 캡 플레이트(20)의 내면에 넓은 면적으로 용접되어 전기적으로 연결된다.The negative lead tabs 51 and 52 electrically connect the negative terminal 21 and the cap plate 20 to the negative and positive ends 11b and 12b of the electrode assembly 10, respectively. . By coupling the negative lead tab 51 to the lower end of the rivet terminal 21a and caulking the lower end, the negative lead tab 51 is connected to the lower end of the rivet terminal 21a while being supported by the flange 21b. And the positive lead tab 52 is bent and welded to the inner surface of the cap plate 20 in a large area is electrically connected.
음극 절연부재(61)는 음극 리드 탭(51)과 캡 플레이트(20) 사이에 설치되어, 음극 리드 탭(51)과 캡 플레이트(20)를 전기적으로 절연시킨다. 또한 음극 절연부재(61)는 일측으로 캡 플레이트(20)에 결합되고 다른 일측으로 음극 리드 탭(51)과 리벳 터미널(21a) 및 플랜지(21b)를 감싸므로 이들의 연결 구조를 견고하게 안정시킨다.The negative electrode insulating member 61 is installed between the negative electrode lead tab 51 and the cap plate 20 to electrically insulate the negative electrode lead tab 51 and the cap plate 20. In addition, since the negative electrode insulating member 61 is coupled to the cap plate 20 on one side and surrounds the negative lead tab 51, the rivet terminal 21 a and the flange 21 b on the other side, the connection structure thereof is firmly stabilized. .
한편, 음극 단자(21)의 플레이트 터미널(21c)은 리벳 터미널(21a)에 전기적으로 연결되고, 절연부재(31)를 개재하여 캡 플레이트(20)의 외측에 배치된다. 절연부재(31)는 플레이트 터미널(21c)과 캡 플레이트(20)를 전기적으로 절연시킨다.On the other hand, the plate terminal 21c of the negative electrode terminal 21 is electrically connected to the rivet terminal 21a and is disposed outside the cap plate 20 via the insulating member 31. The insulating member 31 electrically insulates the plate terminal 21c from the cap plate 20.
도 5는 도 2의 버스바에 구비된 제1노치의 작동 전후 상태의 부분 사시도이다. 도 1, 도 2 및 도 5를 참조하면, 버스바(200)는 벤트 플레이트(25)의 외측에 배치되어, 벤트 플레이트(25) 절개시, 제1단위 셀(101)과 제2단위 셀(102)의 전기적인 연결을 끊어줄 수 있도록 구성된다.5 is a partial perspective view of a state before and after the operation of the first notch provided in the bus bar of FIG. 1, 2 and 5, the bus bar 200 is disposed outside the vent plate 25, so that when the vent plate 25 is cut, the first unit cell 101 and the second unit cell ( 102) is configured to break the electrical connection.
즉, 버스바(200)는 제1, 제2단위 셀들(101, 102)의 외부에서 양극성을 가지는 캡 플레이트(20)와 음극 단자(21)를 전기적으로 연결하도록 구성된다. 편의상, 단위 셀들(100)의 직렬 연결을 예시한다.That is, the bus bar 200 is configured to electrically connect the cap plate 20 having the polarity and the cathode terminal 21 to the outside of the first and second unit cells 101 and 102. For convenience, a series connection of unit cells 100 is illustrated.
일례를 들면, 버스바(200)는 단자 연결부(210)와 벤팅 연결부(220)를 포함한다. 단자 연결부(210)는 단위 셀들(100) 중 제1단위 셀(101)의 제1전극단자(음극 단자(21))에 연결된다. 예를 들면, 단자 연결부(210)는 음극 단자(21)의 플레이트 터미널(21c)에 용접으로 연결될 수 있다.For example, the bus bar 200 may include a terminal connector 210 and a venting connector 220. The terminal connector 210 is connected to the first electrode terminal (cathode terminal 21) of the first unit cell 101 among the unit cells 100. For example, the terminal connection unit 210 may be connected to the plate terminal 21c of the negative electrode terminal 21 by welding.
벤팅 연결부(220)는 제1단위 셀(101)에 이웃하는 제2단위 셀(102)에서, 벤트 홀(24)에 대응하여 캡 플레이트(20)의 외표면에 연결되며, 벤트 플레이트(25) 절개시 전기적 연결을 끊어줄 수 있도록 형성된다.The vent connection portion 220 is connected to the outer surface of the cap plate 20 in correspondence with the vent hole 24 in the second unit cell 102 adjacent to the first unit cell 101, and the vent plate 25. It is formed to cut off the electrical connection at the time of incision.
제1단위 셀(101)의 음극 단자(21)와 제2단위 셀(102)의 캡 플레이트(20)의 높이 차이로 인하여, 단자 연결부(210)는 z축 방향으로 높이 차이를 가지도록 절곡되어 형성될 수 있다.Due to the height difference between the cathode terminal 21 of the first unit cell 101 and the cap plate 20 of the second unit cell 102, the terminal connection portion 210 is bent to have a height difference in the z-axis direction. Can be formed.
도시된 버스바(200)를 참조하면, 단자 연결부(210)는 벤팅 연결부(220) 측에서 낮게 형성되고 음극 단자(21) 측에서 높게 형성되므로 음극 단자(21)와 캡 플레이트(20) 간의 높이 차이를 극복할 수 있다.Referring to the illustrated bus bar 200, the terminal connecting portion 210 is formed at a lower side of the venting connecting portion 220 and higher at the negative terminal 21 side, so that the height between the negative terminal 21 and the cap plate 20 is high. You can overcome the differences.
벤팅 연결부(220)는 캡 플레이트(20)에 전기적으로 연결되는 제1연결 라인(221)을 구비한다. 제1연결 라인(221)은 벤트 홀(24)에 대응하는 캡 플레이트(20)의 외표면에서 벤팅 연결부(220)의 반대측에서 용접 라인으로 형성될 수 있다. 따라서 벤팅 연결부(220)는 제1연결 라인(221)을 통하여 캡 플레이트(20)와 전기적으로 연결된다.The vent connection 220 has a first connection line 221 electrically connected to the cap plate 20. The first connection line 221 may be formed as a welding line on the opposite side of the vent connecting portion 220 on the outer surface of the cap plate 20 corresponding to the vent hole 24. Therefore, the vent connecting part 220 is electrically connected to the cap plate 20 through the first connection line 221.
벤팅 연결부(220)는 캡 플레이트(20)에 전기적인 절연 구조로 연결되는 제2연결 라인(222)를 구비하다. 제2연결 라인(222)는 벤트 홀(24)에 대응하는 캡 플레이트(20)의 외표면에서 벤팅 연결부(220) 측에서 접착 라인으로 형성될 수 있다. 따라서 벤팅 연결부(220)는 제2연결 라인(222)에 의하여 캡 플레이트(20)와 전기적으로 절연된다.The vent connection 220 has a second connection line 222 that is electrically connected to the cap plate 20. The second connection line 222 may be formed as an adhesive line on the vent connection portion 220 side at the outer surface of the cap plate 20 corresponding to the vent hole 24. Therefore, the vent connection 220 is electrically insulated from the cap plate 20 by the second connection line 222.
벤팅 연결부(220)는 제1연결 라인(221)과 제2연결 라인(222) 사이에 제1노치(223)(도 5의 실선 상태)를 구비하여, 벤트 플레이트(25) 절개시 벤트 홀(24)을 통한 토출 압력에 의하여 제1노치(223)를 통하여 절개된다. 제1노치(223)가 절개(도 5의 가상선 상태)되므로 벤팅 연결부(220)는 제1연결 라인(221) 측과 제2연결 라인(222) 측으로 분리된다.The vent connection part 220 includes a first notch 223 (solid line state of FIG. 5) between the first connection line 221 and the second connection line 222, so that the vent hole 25 may be opened when the vent plate 25 is cut. It is cut through the first notch 223 by the discharge pressure through the 24. Since the first notch 223 is cut (a virtual line state of FIG. 5), the vent connection part 220 is separated into the first connection line 221 and the second connection line 222.
이와 같이, 버스바(200)의 벤팅 연결부(220)가 제1노치(223)에서 파단 되므로 제1연결 라인(221) 측 제2단위 셀(102)의 캡 플레이트(20)와 제2연결 라인(222) 측 제1단위 셀(101)의 음극 단자(21)는 전기적으로 서로 끊어진다. 즉 제2단위 셀(102)은 1차 안전성을 확보한다.As such, since the venting connection part 220 of the bus bar 200 is broken at the first notch 223, the cap plate 20 and the second connection line of the second unit cell 102 on the first connection line 221 side are broken. The negative terminal 21 of the first unit cell 101 on the (222) side is electrically disconnected from each other. That is, the second unit cell 102 secures primary safety.
즉 제2단위 셀(102)의 벤트 플레이트(25) 절개시, 이웃하는 제1, 제2단위 셀(101, 102)의 전기적인 연결이 끊어지므로 이웃하는 벤트 플레이트(25)가 절개되지 않은 제1단위 셀들(101)의 안전성이 확보될 수 있다. 제1단위 셀(101)은 2차 안전성을 더 확보할 수 있다.That is, when the vent plate 25 is cut in the second unit cell 102, the electrical connection between the neighboring first and second unit cells 101 and 102 is cut off, and thus the neighboring vent plate 25 is not cut out. Safety of the unit cells 101 may be secured. The first unit cell 101 may further secure secondary safety.
이하 본 발명의 다양한 실시예들에 대하여 설명한다. 다양한 실시예들을 제1실시예 및 기 설명된 실시예와 비교하여, 서로 동일한 구성에 대하여 생략하고 서로 다른 구성에 대하여 설명한다.Hereinafter, various embodiments of the present invention will be described. Compared to the first embodiment and the previously described embodiment, various embodiments will be omitted for the same configuration and will be described with respect to the different configuration.
도 6은 본 발명의 제2실시예에 따른 이차 전지 모듈을 분해한 사시도이고, 도 7은 도 6의 이차 전지 모듈을 결합한 평면도이며, 도 8은 도 6에 적용되는 단위 셀의 사시도이며, 도 9는 도 8의 Ⅸ-Ⅸ 선을 따라 자른 단면도이다.FIG. 6 is an exploded perspective view of a rechargeable battery module according to a second exemplary embodiment of the present invention, FIG. 7 is a plan view illustrating a secondary battery module of FIG. 6, and FIG. 8 is a perspective view of a unit cell applied to FIG. 9 is a cross-sectional view taken along the line VII-VII of FIG. 8.
도 6 내지 도 9를 참조하면, 제2실시예의 이차 전지 모듈(2)에서, 단위 셀들(300)(제1, 제2단위 셀들(301, 302)은 제2전극단자(이하 "양극 단자"라 한다)(22)를 더 포함한다.6 to 9, in the secondary battery module 2 of the second embodiment, the unit cells 300 (the first and second unit cells 301 and 302) may have a second electrode terminal (hereinafter, referred to as a “positive electrode terminal”). 22).
양극 단자(22)는 음극 단자(21)와 같은 구조로, 캡 플레이트(20)의 단자홀(H2)에 설치되는 리벳 터미널(22a), 캡 플레이트(20)의 내측에서 리벳 터미널(22a)에 일체로 넓게 형성되는 플랜지(22b), 및 캡 플레이트(20)의 외측에 배치되어 리벳 터미널(22a)에 리벳팅 또는 용접으로 연결되는 플레이트 터미널(22c)을 포함한다.The positive terminal 22 has the same structure as the negative terminal 21 and is provided to the rivet terminal 22a installed in the terminal hole H2 of the cap plate 20 and to the rivet terminal 22a from the inside of the cap plate 20. An integrally wide flange 22b and a plate terminal 22c disposed outside the cap plate 20 and connected by riveting or welding to the rivet terminal 22a.
양극 개스킷(37)은 양극 단자(22)의 리벳 터미널(22a)과 단자홀(H2)의 내면 사이에 설치되어, 양극 단자(22)의 리벳 터미널(22a)과 캡 플레이트(20) 사이를 실링하고 전기적으로 절연한다.The positive electrode gasket 37 is provided between the rivet terminal 22a of the positive electrode terminal 22 and the inner surface of the terminal hole H2 to seal between the rivet terminal 22a of the positive electrode terminal 22 and the cap plate 20. And electrically insulate.
양극 개스킷(37)은 플랜지(22b)와 캡 플레이트(20)의 내면 사이에 더 연장 설치되어, 플랜지(22b)와 캡 플레이트(20) 사이를 더 실링하고 전기적으로 절연한다. 즉 양극 개스킷(37)은 캡 플레이트(20)에 양극 단자(22)를 설치함으로써 단자홀(H2)을 통하여 전해액이 새는 것(leak)을 방지한다.The anode gasket 37 extends further between the flange 22b and the inner surface of the cap plate 20 to further seal and electrically insulate between the flange 22b and the cap plate 20. That is, the positive electrode gasket 37 prevents the electrolyte from leaking through the terminal hole H2 by providing the positive electrode terminal 22 in the cap plate 20.
양극 리드 탭(52)은 양극 단자(22)를 전극 조립체(10)의 양극(12) 무지부(12b)에 전기적으로 연결한다. 즉 양극 리드 탭(52)을 리벳 터미널(22a)의 하단에 결합하여 하단을 코킹(caulking)함으로써, 양극 리드 탭(52)은 플랜지(22b)에 지지되면서 리벳 터미널(22a)의 하단에 연결된다.The positive lead tab 52 electrically connects the positive terminal 22 to the positive electrode 12 uncoated portion 12b of the electrode assembly 10. That is, the positive lead tab 52 is coupled to the lower end of the rivet terminal 22a to caulk the lower end so that the positive lead tab 52 is connected to the lower end of the rivet terminal 22a while being supported by the flange 22b. .
양극 절연부재(62)는 양극 리드 탭(52)과 캡 플레이트(20) 사이에 설치되어, 양극 리드 탭(52)과 캡 플레이트(20)를 전기적으로 절연시킨다. 또한 양극 절연부재(62)는 일측으로 캡 플레이트(20)에 결합되고 다른 일측으로 양극 리드 탭(52)과 리벳 터미널(22a) 및 플랜지(22b)를 감싸므로 이들의 연결 구조를 견고하게 안정시킨다.The positive electrode insulating member 62 is provided between the positive electrode lead tab 52 and the cap plate 20 to electrically insulate the positive electrode lead tab 52 and the cap plate 20. In addition, since the anode insulation member 62 is coupled to the cap plate 20 on one side and surrounds the anode lead tab 52, the rivet terminal 22a and the flange 22b on the other side, the connection structure thereof is firmly stabilized. .
양극 단자(22) 측의 탑 플레이트(46)는 양극 단자(22)의 플레이트 터미널(22c)과 캡 플레이트(20)를 전기적으로 연결한다. 예를 들면, 탑 플레이트(46)는 플레이트 터미널(22c)과 캡 플레이트(20) 사이에 개재되고 리벳 터미널(22a)을 관통시킨다.The top plate 46 on the positive terminal 22 side electrically connects the plate terminal 22c and the cap plate 20 of the positive terminal 22. For example, the top plate 46 is interposed between the plate terminal 22c and the cap plate 20 and penetrates the rivet terminal 22a.
따라서 탑 플레이트(46)와 플레이트 터미널(22c)을 리벳 터미널(22a)의 상단에 결합하여 상단을 코킹함으로써, 탑 플레이트(46)와 플레이트 터미널(22c)은 리벳 터미널(22a)의 상단에 결합된다. 플레이트 터미널(22c)은 탑 플레이트(46)를 개재한 상태로 캡 플레이트(20)의 외측에 설치된다.Therefore, the top plate 46 and the plate terminal 22c are coupled to the top of the rivet terminal 22a to caulk the top, so that the top plate 46 and the plate terminal 22c are coupled to the top of the rivet terminal 22a. . The plate terminal 22c is installed outside the cap plate 20 with the top plate 46 interposed therebetween.
한편, 양극 개스킷(37)은 리벳 터미널(22a)과 탑 플레이트(46) 사이로 더 연장되어 설치된다. 즉 양극 개스킷(37)은 리벳 터미널(22a)과 탑 플레이트(46)가 전기적으로 직접 연결되는 것을 방지한다. 즉 리벳 터미널(22a)은 플레이트 터미널(22c)을 통하여 탑 플레이트(46)에 전기적으로 연결된다.On the other hand, the anode gasket 37 is further extended between the rivet terminal 22a and the top plate 46. That is, the anode gasket 37 prevents the rivet terminal 22a and the top plate 46 from being electrically connected directly. That is, the rivet terminal 22a is electrically connected to the top plate 46 through the plate terminal 22c.
일례를 들면, 버스바(400)는 단자 연결부(410)와 벤팅 연결부(220)를 포함한다. 단자 연결부(410)는 단위 셀들(300) 중 제1단위 셀(301)의 제1전극단자(음극 단자(21))에 연결된다. 예를 들면, 단자 연결부(410)는 음극 단자(21)의 플레이트 터미널(21c)에 용접으로 연결될 수 있다.For example, the bus bar 400 may include a terminal connection part 410 and a vent connection part 220. The terminal connection part 410 is connected to the first electrode terminal (cathode terminal 21) of the first unit cell 301 of the unit cells 300. For example, the terminal connection part 410 may be welded to the plate terminal 21c of the negative electrode terminal 21.
제1실시예는 제1, 제2단위 셀들(101, 102)에 음극 단자(21)를 구비하여 버스바(200)로 음극 단자(21)를 캡 플레이트(20)에 전기적으로 연결하므로 직렬 연결을 용이하게 한다.In the first embodiment, since the negative terminal 21 is provided in the first and second unit cells 101 and 102 to electrically connect the negative terminal 21 to the cap plate 20 through the busbar 200, the series connection is performed. To facilitate.
이에 비하여, 제2실시예는 제1, 제2단위 셀들(301, 302)이 음, 양극 단자(21, 22)를 구비하여 버스바(400)로 음극 단자(21) 또는 양극 단자(22)를 캡 플레이트(20)에 전기적으로 연결하므로 직렬 연결 또는 병렬 연결을 용이하게 한다.In contrast, in the second embodiment, the first and second unit cells 301 and 302 are provided with negative and positive terminals 21 and 22, and the negative terminal 21 or the positive terminal 22 is connected to the bus bar 400. Is electrically connected to the cap plate 20 to facilitate series connection or parallel connection.
도 10은 본 발명의 제3실시예에 따른 이차 전지 모듈을 결합한 평면도이다. 도 10을 참조하면, 제3실시예의 이차 전지 모듈(3)에서, 버스바(500)는 단자 연결부(510)와 벤팅 연결부(220) 및 벤트 대응부(530)를 포함한다.10 is a plan view illustrating a secondary battery module in accordance with a third embodiment of the present invention. Referring to FIG. 10, in the secondary battery module 3 of the third embodiment, the bus bar 500 includes a terminal connection part 510, a venting connection part 220, and a vent corresponding part 530.
벤트 대응부(530)는 단자 연결부(510)와 벤팅 연결부(220) 사이에서 제1단위 셀(101)의 벤트 홀(24)에 대응하여 배치된다. 그리고 버스바(500)는 단자 연결부(510)와 벤트 대응부(530) 사이에 제2노치(540)를 구비한다. The vent corresponding part 530 is disposed between the terminal connection part 510 and the venting connection part 220 to correspond to the vent hole 24 of the first unit cell 101. The bus bar 500 includes a second notch 540 between the terminal connection part 510 and the vent counterpart 530.
제2노치(540)는 제1단위 셀(101)의 벤트 플레이트(25) 절개시 벤트 홀(24)을 통한 토출 압력이 벤트 대응부(530)에 작용함에 따라 절개되어 제1, 제2단위 셀(101, 102)의 전기적 연결을 끊어줄 수 있다.The second notch 540 is cut when the discharge pressure through the vent hole 24 acts on the vent counterpart 530 when the vent plate 25 is cut in the first unit cell 101. The electrical connection of the cells 101 and 102 may be broken.
이와 같이, 버스바(500)의 벤트 대응부(530)의 작동에 따라 제2노치(540)가 파단 되므로 단자 연결부(510) 측 제1단위 셀(101)의 음극 단자(21)와 벤트 대응부(530) 측 제2단위 셀(102)의 캡 플레이트(20)는 전기적으로 서로 끊어진다.As described above, since the second notch 540 is broken according to the operation of the vent corresponding part 530 of the bus bar 500, the negative terminal 21 of the first unit cell 101 of the terminal connecting part 510 corresponds to the vent. The cap plate 20 of the second unit cell 102 on the side of the unit 530 is electrically disconnected from each other.
즉 벤트 대응부(530)의 작동에 따라 제2노치(540)가 파단되어 이웃하는 제1, 제2단위 셀(101, 102)의 전기적인 연결이 끊어지므로 이웃하는 벤트 플레이트(25)가 절개되지 않은 제2단위 셀들(102)의 안전성이 확보될 수 있다.That is, the second notch 540 is broken according to the operation of the vent counterpart 530, so that the electrical connection of the neighboring first and second unit cells 101 and 102 is cut off, so that the neighboring vent plate 25 is incised. Safety of the second unit cells 102 that are not yet secured may be secured.
이상을 통해 본 발명의 바람직한 실시예에 대하여 설명하였지만, 본 발명은 이에 한정되는 것이 아니고 특허청구범위와 발명의 상세한 설명 및 첨부한 도면의 범위 안에서 여러 가지로 변형하여 실시하는 것이 가능하고 이 또한 본 발명의 범위에 속하는 것은 당연하다.Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications and changes can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings. Naturally, it belongs to the scope of the invention.
- 부호의 설명 -Description of the sign
1, 2, 3: 이차 전지 모듈 10: 전극 조립체1, 2, 3: secondary battery module 10: electrode assembly
11, 12: 제1, 제2전극(음, 양극) 11a, 12a: 코팅부11, 12: 1st, 2nd electrode (negative and anode) 11a, 12a: coating part
11b, 12b: 무지부 13: 세퍼레이터11b, 12b: Plain part 13: Separator
15: 케이스 20: 캡 플레이트15: case 20: cap plate
21: 제1전극단자(음극 단자) 21a, 22a: 리벳 터미널21: first electrode terminal (cathode terminal) 21a, 22a: rivet terminal
21b, 22b: 플랜지 21c, 22c: 플레이트 터미널21b, 22b: flange 21c, 22c: plate terminal
22: 제2전극단자(양극 단자) 24: 벤트 홀22: second electrode terminal (anode terminal) 24: vent hole
25: 벤트 플레이트 27: 밀봉 마개25: vent plate 27: sealing stopper
29: 전해액 주입구 31: 절연부재29: electrolyte injection hole 31: insulating member
36, 37: 음, 양극 개스킷 46: 탑 플레이트36, 37: um, positive gasket 46: top plate
51, 52: 음, 양극 리드 탭 61, 62: 음, 양극 절연부재51, 52: negative, positive lead tab 61, 62: negative, positive electrode insulating member
100, 300: 단위 셀들 101, 301: 제1단위 셀100, 300: unit cells 101, 301: first unit cell
102, 302: 제2단위 셀 200, 400, 500: 버스바102, 302: second unit cell 200, 400, 500: busbar
210, 410, 510: 단자 연결부 220: 벤팅 연결부210, 410, 510: terminal connection 220: venting connection
221: 제1연결 라인 222: 제2연결 라인221: first connection line 222: second connection line
223: 제1노치 530: 벤트 대응부223: first notch 530: vent counterpart
540: 제2노치 H1, H2: 단자홀540: second notch H1, H2: terminal hole

Claims (11)

  1. 제1전극과 제2전극을 구비하는 전극 조립체를 케이스에 내장하고, 상기 케이스의 개구를 캡 플레이트로 밀폐하며, 상기 캡 플레이트의 벤트 홀에 벤트 플레이트를 구비하고, 상기 제1전극에 연결되는 제1전극단자를 상기 캡 플레이트에 관통하여 설치하며, 상기 캡 플레이트를 상기 제2전극에 전기적으로 연결하는 복수의 단위 셀들; 및An electrode assembly including a first electrode and a second electrode in a case, sealing the opening of the case with a cap plate, a vent plate in a vent hole of the cap plate, and connected to the first electrode; A plurality of unit cells that penetrate one electrode terminal through the cap plate and electrically connect the cap plate to the second electrode; And
    상기 벤트 플레이트의 외측에 배치되어 상기 벤트 플레이트 절개시 상기 단위 셀들의 전기적인 연결을 끊어주는 버스바A bus bar disposed outside the vent plate to disconnect electrical connections of the unit cells when the vent plate is cut.
    를 포함하는 이차 전지 모듈.Secondary battery module comprising a.
  2. 제1항에 있어서,The method of claim 1,
    상기 버스바는The bus bar is
    상기 단위 셀들의 외부에서 상기 캡 플레이트와 상기 제1전극단자를 전기적으로 연결하는 이차 전지 모듈.A secondary battery module electrically connecting the cap plate and the first electrode terminal to the outside of the unit cells.
  3. 제1항에 있어서,The method of claim 1,
    상기 버스바는The bus bar is
    상기 단위 셀들 중 제1단위 셀의 상기 제1전극단자에 연결되는 단자 연결부, 및A terminal connection part connected to the first electrode terminal of a first unit cell among the unit cells, and
    상기 제1단위 셀에 이웃하는 제2단위 셀에서, 상기 벤트 홀에 대응하여 상기 캡 플레이트의 외표면에 연결되며, 상기 벤트 플레이트 절개시 전기적 연결을 끊어주는 벤팅 연결부A vent connection part connected to an outer surface of the cap plate corresponding to the vent hole in the second unit cell adjacent to the first unit cell and disconnecting the electrical connection when the vent plate is cut;
    를 포함하는 이차 전지 모듈.Secondary battery module comprising a.
  4. 제3항에 있어서,The method of claim 3,
    상기 벤팅 연결부는The vent connection
    상기 벤트 홀에 대응하는 상기 캡 플레이트의 외표면에서 상기 벤팅 연결부의 반대측에서 상기 캡 플레이트에 전기적으로 연결되는 제1연결 라인을 포함하는 이차 전지 모듈.And a first connection line electrically connected to the cap plate on an outer surface of the cap plate corresponding to the vent hole on the opposite side of the vent connection portion.
  5. 제4항에 있어서,The method of claim 4, wherein
    상기 벤팅 연결부는The vent connection
    상기 벤트 홀에 대응하는 상기 캡 플레이트의 외표면에서 상기 벤팅 연결부 측에서 상기 캡 플레이트에 절연 구조로 연결되는 제2연결 라인을 포함하는 이차 전지 모듈.And a second connection line connected to the cap plate at an outer surface of the cap plate corresponding to the vent hole by an insulating structure at the vent connection portion.
  6. 제5항에 있어서,The method of claim 5,
    상기 벤팅 연결부는The vent connection
    상기 제1연결 라인과 상기 제2연결 라인 사이에 구비되어, 상기 벤트 플레이트 절개시 절개되는 제1노치를 구비하는 이차 전지 모듈.A secondary battery module having a first notch provided between the first connection line and the second connection line and cut when the vent plate is cut.
  7. 제1항에 있어서,The method of claim 1,
    상기 제1전극은 The first electrode
    제1리드 탭으로 상기 제1전극단자에 전기적으로 연결되고,A first lead tab is electrically connected to the first electrode terminal,
    상기 제2전극은 The second electrode
    제2리드 탭으로 상기 캡 플레이트에 전기적으로 연결되는 이차 전지 모듈.A secondary battery module electrically connected to the cap plate with a second lead tab.
  8. 제3항에 있어서,The method of claim 3,
    상기 단위 셀들은The unit cells
    상기 제2전극에 연결되어 상기 캡 플레이트에 관통하여 설치되는 제2전극단자를 더 포함하는 이차 전지 모듈.And a second electrode terminal connected to the second electrode and penetrating through the cap plate.
  9. 제8항에 있어서,The method of claim 8,
    상기 제2전극단자는The second electrode terminal
    상기 캡 플레이트의 단자홀에 설치되는 리벳 터미널, Rivet terminal installed in the terminal hole of the cap plate,
    상기 캡 플레이트의 내측에서 상기 리벳 터미널에 일체로 넓게 형성되는 플랜지, 및A flange integrally formed on the rivet terminal inside the cap plate, and
    상기 캡 플레이트의 외측에 배치되어 상기 리벳 터미널에 연결되고, 상기 버스바의 상기 단자 연결부에 연결되는 플레이트 터미널을 포함하는 이차 전지 모듈.And a plate terminal disposed outside the cap plate and connected to the rivet terminal and connected to the terminal connection portion of the bus bar.
  10. 제3항에 있어서,The method of claim 3,
    상기 버스바는The bus bar is
    상기 단자 연결부와 상기 벤팅 연결부 사이에서 상기 제1단위 셀의 벤트 홀에 대응하는 벤트 대응부를 더 포함하는 이차 전지 모듈.And a vent corresponding part corresponding to the vent hole of the first unit cell between the terminal connection part and the vent connection part.
  11. 제10항에 있어서,The method of claim 10,
    상기 버스바는The bus bar is
    상기 단자 연결부와 상기 벤트 대응부 사이에 구비되어 상기 제1단위 셀의 벤트 플레이트 절개시 절개되는 제2노치를 포함하는 이차 전지 모듈.And a second notch provided between the terminal connection part and the vent corresponding part to cut when the vent plate of the first unit cell is cut.
PCT/KR2017/006220 2016-06-27 2017-06-15 Secondary battery module WO2018004158A1 (en)

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