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WO2018043889A1 - Batterie secondaire - Google Patents

Batterie secondaire Download PDF

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Publication number
WO2018043889A1
WO2018043889A1 PCT/KR2017/006562 KR2017006562W WO2018043889A1 WO 2018043889 A1 WO2018043889 A1 WO 2018043889A1 KR 2017006562 W KR2017006562 W KR 2017006562W WO 2018043889 A1 WO2018043889 A1 WO 2018043889A1
Authority
WO
WIPO (PCT)
Prior art keywords
flame
vent
cap plate
hole
plate
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/KR2017/006562
Other languages
English (en)
Korean (ko)
Inventor
이현수
변상원
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 WO2018043889A1 publication Critical patent/WO2018043889A1/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
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/383—Flame arresting or ignition-preventing means
    • 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
    • H01M50/30—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
    • H01M50/317—Re-sealable arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2200/00—Safety devices for primary or secondary batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—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 that minimizes the emission of a flame to the outside when a cell event occurs.
  • 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 includes 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, and an electrode terminal installed on the cap plate and electrically connected to the electrode assembly.
  • 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 notch of the vent plate is cut open to open the vent hole to discharge the internal pressure.
  • a flame generated inside the secondary battery may be ejected to the outside through the cut vent plate and the vent hole. Outgoing flames can cause secondary events, reducing cell safety.
  • One aspect of the present invention is to provide a secondary battery that minimizes external ejection of a flame even when a cell event occurs.
  • a secondary battery includes an electrode assembly for charging and discharging a current, a case accommodating the electrode assembly, a cap plate coupled to an opening of the case, and the cap plate electrically connected to the electrode assembly.
  • the flame control member is provided in correspondence with the inner surface of the cap plate at the vent hole to partially eject the flame, and spaced apart from the first flame vent member at a first interval in the vent hole.
  • the second flame vent member may be installed to partially eject the flame.
  • the first flame vent member and the second flame vent member may form a jet path that is shifted from each other with respect to the plane of the vent plate.
  • the vent plate may be spaced apart from the first flame vent member at a second interval in the vent hole.
  • the vent plate may be installed to correspond to an outer surface of the cap plate.
  • the vent hole may be formed on the inner surface of the cap plate in a stepped manner to weld and support the first flame vent member, and the second flame vent member spaced apart at the first interval from the first stage hole. It may include a second end hole for welding support.
  • the vent hole may further include a third end hole spaced apart from the second end hole by the second interval to weld-support the vent plate.
  • the third end hole may be formed larger than the second end hole in a size set in the length direction of the cap plate.
  • the first flame vent member is connected to the first blocking portion to partially block the first end hole at the first side in the longitudinal direction of the cap plate, and to the first blocking portion at the second side in the longitudinal direction. It may include a first opening for partially opening the first end hole.
  • the second flame vent member may include: a second blocking portion partially blocking the second end hole in response to the first opening portion on the second side, and in response to the first blocking portion on the first side; It may include a second opening for partially opening the second end hole.
  • a first boundary line set between the first blocking portion and the first opening portion may be disposed to be offset by the first distance from the center in the longitudinal direction to the second side.
  • the second boundary line set between the second blocking portion and the second opening portion in the second flame vent member may be disposed to be offset by the second distance from the center in the longitudinal direction to the first side.
  • the first open part and the second open part may include a plurality of holes.
  • the first flame vent member is connected to the first blocking portion to partially block the first end hole on the first side in the width direction of the cap plate, and to the first blocking portion on the second side in the width direction. It may include a first opening for partially opening the first end hole.
  • the second flame vent member may include: a second blocking portion partially blocking the second end hole in response to the first opening portion on the second side, and in response to the first blocking portion on the first side; It may include a second opening for partially opening the second end hole.
  • a twenty-first boundary line set between the first blocking portion and the first opening portion in the first flame vent member may be disposed to be offset by the 21st distance from the center in the width direction to the second side.
  • a twenty-second boundary line set between the second blocking portion and the second opening portion in the second flame vent member may be disposed to be offset by the twenty-second distance from the center of the width direction to the first side.
  • the vent hole is provided with a vent plate and a flame control member, and when the cell event occurs, the flame control member partially blocks and opens the flame, thereby controlling the path length of the flame that is ejected. . Therefore, external blowout of the flame can be minimized and cell safety can be increased.
  • FIG. 1 is a perspective view of a rechargeable battery according to a first exemplary embodiment of the present invention.
  • FIG. 2 is another cross-sectional view along the line II-II of FIG. 1.
  • FIG. 3 is an exploded perspective view illustrating the vent hole, the vent plate, and the first and second flame vent members of the cap plate in FIG. 2.
  • FIG. 4 is a cross-sectional view taken along the line IV-IV of FIG. 3.
  • FIG. 5 is a plan view illustrating an arrangement relationship between a blocking part and an opening part in the first and second flame vent members of FIG. 4.
  • FIG. 6 is a plan view illustrating an arrangement relationship between a blocking part and an opening part in the first and second flame vent members in the rechargeable battery according to the second exemplary embodiment of the present invention.
  • FIG. 1 is a perspective view of a rechargeable battery according to a first exemplary embodiment of the present invention
  • FIG. 2 is another cross-sectional view taken along line II-II of FIG. 1.
  • the secondary battery includes an electrode assembly 10 for charging and discharging a current, a case 15 containing the electrode assembly 10, and a cap plate 20 coupled to an opening of the case 15. ), And first and second electrode terminals (negative and positive terminal) 21 and 22 provided on the cap plate 20.
  • the secondary battery may further include an external short circuit portion 40 on the negative electrode terminal 21 side.
  • 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.
  • the cathode 11, the separator 13, and the anode 12 may be formed by winding or stacking them in a jelly roll state.
  • the negative electrode 11 and the positive electrode 12 each include coating portions 11a and 12a in which the active material is applied to the current collector of the metal plate, and plain portions 11b and 12b formed of the current collector exposed by not applying the active material. do.
  • the uncoated portion 11b of the negative electrode 11 is formed at one end of the negative electrode 11 along the negative electrode 11 to be wound or laminated.
  • the uncoated portion 12b of the anode 12 is formed at one end of the anode 12 along the anode 12 to be wound or stacked.
  • the uncoated portions 11b and 12b may be disposed at both ends of the electrode assembly 10, respectively.
  • the uncoated parts may be arranged side by side at one end of the electrode assembly.
  • the case 15 is formed of a substantially rectangular parallelepiped 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 of the case 15.
  • the case 15 and the cap plate 20 may be made of aluminum and welded to each other.
  • the cap plate 20 further includes terminal holes H1 and H2, an electrolyte injection hole 29, and a vent hole 24.
  • the positive electrode terminals 21 and 22 are electrically and mechanically connected to the electrode assembly 10 and are installed in the terminal holes H1 and H2 of the cap plate 20.
  • the positive and negative terminals 21 and 22 are electrically connected to the negative and positive electrodes 11 and 12 of the electrode assembly 10, respectively. Therefore, the electrode assembly 10 is drawn out of the case 15 through the negative and positive terminals 21 and 22.
  • the positive and negative terminals 21 and 22 are rivet terminals 21a and 22a respectively installed in the terminal holes H1 and H2 of the cap plate 20, and the rivet terminals 21a and 22a inside the cap plate 20.
  • Flanges 21b and 22b which are integrally formed at the wide ends of the cap plate 20 and plate terminals 21c and 22c which are disposed outside the cap plate 20 and are connected by riveting or welding to the rivet terminals 21a and 22a.
  • the negative and positive gaskets 36 and 37 are provided between the rivet terminals 21a and 22a of the negative and positive terminal 21 and 22 and the inner surfaces of the terminal holes H1 and H2, respectively. Between the rivet terminals 21a and 22a of the 22 and the cap plate 20 is sealed and electrically insulated.
  • the anode gaskets 36 and 37 are further installed between the flanges 21b and 22b and the inner surface of the cap plate 20 to further seal and electrically connect between the flanges 21b and 22b and the cap plate 20. Insulate. That is, the positive and negative gaskets 36 and 37 are provided with the negative and positive terminals 21 and 22 in the cap plate 20 to prevent leakage of the electrolyte through the terminal holes H1 and H2.
  • the negative lead tabs 51 and 52 electrically and mechanically connect the negative and positive terminals 21 and 22 to the negative and positive electrodes 11 and 12 of the electrode assembly 10, respectively.
  • the positive and negative lead tabs 51 and 52 are coupled to the lower ends of the rivet terminals 21a and 22a to caulk the lower ends so that the negative and positive lead tabs 51 and 52 are connected to the flanges 21b and 22b. While being supported, it is connected to the lower ends of the rivet terminals 21a and 22a.
  • the negative and positive insulating members 61 and 62 are provided between the negative and positive lead tabs 51 and 52 and the cap plate 20, respectively. Insulate electrically.
  • the negative and positive electrode insulating members 61 and 62 are coupled to the cap plate 20 on one side, and the negative and positive lead tabs 51 and 52 and the rivet terminals 21a and 22a and the flanges 21b and 22b on the other side. It wraps around and stabilizes their connection structure.
  • the external short circuit portion 40 on the side of the negative electrode terminal 21 includes a short circuit tab 41 and a short circuit member 43 spaced apart or shorted according to internal pressure that may be generated during overcharging.
  • the shorting tab 41 is electrically connected to the rivet terminal 21a of the negative electrode terminal 21 and disposed outside the cap plate 20 via the insulating member 31.
  • the insulating member 31 is installed between the short tab 41 and the cap plate 20 to electrically insulate the short tab 41 and the cap plate 20. That is, the cap plate 20 is maintained in an electrically insulated state from the negative terminal 21.
  • the shorting tab 41 and the plate terminal 21c are coupled to the upper end of the rivet terminal 21a. Therefore, the short tab 41 and the plate terminal 21c are fixed to the cap plate 20 with the insulating member 31 interposed therebetween.
  • the short circuit member 43 is installed in the short circuit hole 42 formed in the cap plate 20 to seal the short circuit hole 42 to receive the internal pressure of the secondary battery.
  • the shorting tab 41 is connected to the negative electrode terminal 21 and extends along the outside of the shorting member 43. Therefore, the short circuit tab 41 and the short circuit member 43 correspond to the short circuit holes 42, maintain the spaced apart state (solid line state) to face each other, and invert the short circuit member 43 when the internal pressure of the secondary battery rises.
  • a short circuit state (virtual line state) can be formed.
  • 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.
  • the rivet terminal 22a is electrically connected to the top plate 46 via the plate terminal 22c. That is, the cap plate 20 is connected to the positive terminal 22 and charged with the positive electrode.
  • the short circuit tab 41 charged with the negative electrode and the short circuit member 43 charged with the positive electrode form an external short circuit with an increase in internal pressure generated during overcharging, thereby safely discharging the current charged in the electrode assembly 10 from the outside. You can.
  • 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.
  • the rechargeable battery of the exemplary embodiment further includes a vent plate 25 installed in the vent hole 24 and a flame control member 26 installed in the vent hole 24 inside the vent plate 25.
  • the flame control member 26 is configured to control the path length of the flame ejected from the inside of the cap plate 20 to the outside during the cell event of the secondary battery, thereby minimizing the flame ejected through the vent hole 24.
  • the vent plate 25 is installed to seal the vent hole 24 to discharge the internal pressure of the secondary battery. That is, when the internal pressure reaches the set pressure, the vent plate 25 is cut open to open the vent hole 24.
  • the vent plate 25 has a notch 25a for inducing an incision.
  • FIG. 3 is an exploded perspective view illustrating the vent hole, the vent plate, and the first and second flame vent members of the cap plate in FIG. 2, and FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. 3.
  • the flame control member 26 is disposed in a plurality along the thickness direction (z-axis direction) of the cap plate 20 in the vent hole 24, and blows while alternately forming the blocking and opening. Increasing the path length of the flame is minimized to minimize flame ejection.
  • the flame control member 26 includes two first flame vent members 261 and a second flame vent member 262.
  • the first flame vent member 261 is installed in the vent hole 24 to correspond to the inner surface of the cap plate 20 to primarily control the flame generated by the cell event. That is, the first flame vent member 261 is configured to partially block the flame generated by the cell event and to eject only a part of the flame.
  • the second flame vent member 262 is installed at the vent hole 24 to be spaced apart from the first flame vent member 261 and the first interval G1, so that the flame passing through the first flame vent member 261 is secondarily. To control. That is, the second flame vent member 262 is configured to partially block the flame passing through the first flame vent member 261 and to eject only a part of the flame.
  • the first flame vent member 261 and the second flame vent member 262 form a jet path that is shifted from each other with respect to the plane (xy plane) of the vent plate 25. That is, the first and second flame vent members 261 and 262 have partial blowout and partial shutoff on different sides while maintaining the first interval G1.
  • the vent plate 25 is spaced apart from the vent hole 24 by the first flame vent member 261 and the second gap G2. At this time, the vent plate 25 is installed corresponding to the outer surface of the cap plate 20. In the thickness direction (z-axis direction) of the cap plate 20 of the vent hole 24, an installation range of the first and second flame vent members 261 and 262 can be secured.
  • the vent hole 24 includes a first end hole 241, a second end hole 242, and a third end hole 243.
  • the first end hole 241 is formed in the inner surface of the cap plate 20 with a step to support the welding of the first flame vent member 261.
  • the second end hole 242 is spaced apart from the first end hole 241 by the first interval G1 to support the welding of the second flame vent member 262.
  • the third end hole 243 is spaced apart from the second end hole 242 by the second interval G2 to support the welding of the vent plate 25.
  • the third end hole 243 is formed larger than the second end hole 242 in the size set in the longitudinal direction (x-axis direction) of the cap plate 20. Therefore, the flame passing through the second flame vent member 262 acts on the entire area of the vent plate 25 to enable stable cutting of the notch 25a.
  • the first flame vent member 261 includes a first blocking portion 263 and a first opening portion 264.
  • the first blocking portion 263 partially blocks the first end hole 241 at the first side (left side, FIG. 4) in the longitudinal direction (x-axis direction) of the cap plate 20.
  • the first opening portion 264 is connected to the first blocking portion 263 at the second side (right side, FIG. 4) in the longitudinal direction (x-axis direction) to partially open the first end hole 241.
  • the first opening part 264 has a plurality of holes.
  • the second flame vent member 262 includes a second blocking portion 265 and a second opening portion 266.
  • the second blocking part 265 partially blocks the second end hole 242 at the second side (right side, see FIG. 4) corresponding to the first opening part 264.
  • the second open portion 266 partially opens the second end hole 242 at the first side (left side, see FIG. 4) corresponding to the first blocking portion 263.
  • the second open part 266 includes a plurality of holes.
  • FIG. 5 is a plan view illustrating an arrangement relationship between a blocking part and an opening part in the first and second flame vent members of FIG. 4. 4 and 5, a first boundary line B1 is set between the first blocking portion 263 and the first opening portion 264 in the first flame vent member 261.
  • the first boundary line B1 is disposed to be offset by the first distance L1 from the center in the longitudinal direction (x-axis direction) to the second side (right side, see FIGS. 4 and 5).
  • a second boundary line B2 is set between the second blocking portion 265 and the second opening portion 266.
  • the second boundary line B2 is disposed to be biased by the second distance L2 from the center in the longitudinal direction (x-axis direction) to the first side (right side, see FIGS. 4 and 5).
  • the flame generated inside the cell event is partially blocked by the first blocking portion 263 of the first flame vent member 261 and is ejected through the first opening portion 264.
  • the flame ejected to the first open portion 264 of the first flame vent member 261 moves in the longitudinal direction (x-axis direction) by the sum distance L1 + L2 of the first and second distances L1 and L2. do.
  • the moved flame is partially blocked by the second blocking portion 265 of the second flame vent member 262 and is ejected through the second open portion 266.
  • the path length of the flame ejected by the sum distance L1 + L2 becomes long. Therefore, the flame is blocked at the first and second blocking portions 263 and 265 a lot, and the first and second openings 264 and 266 may be partially blown out through the cut vent plate 25. have. As such, when the cell event occurs, the external ejection of the flame through the vent hole 24 is minimized, thereby increasing the cell safety.
  • FIG. 6 is a plan view illustrating an arrangement relationship between a blocking part and an opening part in the first and second flame vent members in the rechargeable battery according to the second exemplary embodiment of the present invention.
  • the first flame vent member 361 includes a first blocking part 363 and a first opening part 364.
  • the first blocking portion 363 partially recesses the first end hole 241 (see FIG. 4 below) on the first side (upper side, see FIG. 6) in the width direction (y-axis direction) of the cap plate 20. Block it.
  • the first opening portion 364 is connected to the first blocking portion 363 at the second side (lower side, see FIG. 6) in the width direction (y-axis direction) to partially open the first end hole 241.
  • the second flame vent member 362 includes a second blocking portion 365 and a second opening portion 366.
  • the second blocking part 365 partially blocks the second end hole 242 (see FIG. 4) in response to the first opening part 364 at the second side (lower side, see FIG. 6).
  • the second open portion 366 partially opens the second end hole 242 at the first side (upper side, see FIG. 6) corresponding to the first blocking portion 363.
  • the twenty-first boundary line B21 is set between the first blocking portion 363 and the first opening portion 364 in the first flame vent member 361.
  • the twenty-first boundary line B21 is disposed to be offset by the twenty-first distance L21 from the center in the width direction (y-axis direction) to the second side (lower side, see FIG. 6).
  • the twenty-second boundary line B22 is set between the second blocking portion 365 and the second opening portion 366.
  • the twenty-second boundary line B22 is disposed to be offset by the twenty-second distance L22 from the center in the width direction (y-axis direction) to the first side (upper side, see FIG. 6).
  • the flame generated inside the cell event is partially blocked by the first blocking portion 363 of the first flame vent member 361 and is ejected through the first opening 364.
  • the flame ejected to the first open portion 364 of the first flame vent member 361 moves in the width direction (y-axis direction) by the sum distance L21 + L22 of the twenty-first and twenty-second distances L21 and L22. do.
  • the moved flame is partially blocked by the second blocking portion 365 of the second flame vent member 362 and is ejected through the second open portion 366.
  • the path length of the flame ejected by the sum distance L21 + L22 becomes long. Therefore, the flame is largely blocked at the first and second blocking parts 363 and 365, and the first and second opening parts 364 and 366 are combined to pass through the cut vent plate 25 (see FIG. 4). Only part of it can be ejected to the outside. As such, during the cell event, external blowout of the flame through the vent hole 24 (see FIG. 4) is minimized, thereby increasing cell safety.
  • electrode assembly 11 first electrode (cathode)
  • vent plate 26 flame control member
  • B1 and B21 First and 21st boundary lines
  • B2 and B22 Second and 22nd boundary lines
  • G1, G2 first and second intervals H1, H2: terminal hole
  • L1 L21: 1st, 21st distance L2, L22: 2nd, 22nd distance

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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)
  • Gas Exhaust Devices For Batteries (AREA)

Abstract

Selon un mode de réalisation de la présente invention, une batterie secondaire comprend : un ensemble électrode pour charger et décharger le courant ; un boîtier pour recevoir l'ensemble électrode ; une plaque de capuchon couplée à une ouverture du boîtier ; une borne d'électrode connectée électriquement à l'ensemble d'électrode et tirée vers l'extérieur à travers la plaque de capuchon ; une plaque de mise à l'air libre disposée dans un trou d'évent de la plaque de capuchon ; et un élément de commande de flamme disposé dans le trou d'évent à l'intérieur de la plaque d'évent de façon à commander la longueur de trajet de l'écoulement de flamme depuis l'intérieur de la plaque de capuchon vers l'extérieur.
PCT/KR2017/006562 2016-08-31 2017-06-22 Batterie secondaire Ceased WO2018043889A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020160111823A KR102249891B1 (ko) 2016-08-31 2016-08-31 이차 전지
KR10-2016-0111823 2016-08-31

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WO2018043889A1 true WO2018043889A1 (fr) 2018-03-08

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Cited By (2)

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CN114765286A (zh) * 2021-01-15 2022-07-19 株式会社Lg新能源 电池模块及电池组
JPWO2022181601A1 (fr) * 2021-02-25 2022-09-01

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Publication number Priority date Publication date Assignee Title
KR102752394B1 (ko) 2020-05-07 2025-01-13 에스케이온 주식회사 배터리 셀 운송 박스
WO2025017399A1 (fr) * 2023-07-14 2025-01-23 Tyco Fire Products Lp Procédé permettant d'atténuer des effets de gaz libérés à partir de composants de batterie

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