WO2017222260A1 - Batterie rechargeable - Google Patents

Batterie rechargeable Download PDF

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Publication number
WO2017222260A1
WO2017222260A1 PCT/KR2017/006415 KR2017006415W WO2017222260A1 WO 2017222260 A1 WO2017222260 A1 WO 2017222260A1 KR 2017006415 W KR2017006415 W KR 2017006415W WO 2017222260 A1 WO2017222260 A1 WO 2017222260A1
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WO
WIPO (PCT)
Prior art keywords
tab
side wall
shorting
insulating body
cap plate
Prior art date
Application number
PCT/KR2017/006415
Other languages
English (en)
Korean (ko)
Inventor
이현수
Original Assignee
삼성에스디아이 주식회사
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 삼성에스디아이 주식회사 filed Critical 삼성에스디아이 주식회사
Publication of WO2017222260A1 publication Critical patent/WO2017222260A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/148—Lids or covers characterised by their shape
    • H01M50/154—Lid or cover comprising an axial bore for receiving a central current collector
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • 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
    • H01M50/586—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries inside the batteries, e.g. incorrect connections of electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/155—Lids or covers characterised by the material
    • H01M50/157—Inorganic material
    • H01M50/159—Metals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/574—Devices or arrangements for the interruption of current
    • 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
    • H01M50/591—Covers
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the present invention relates to a secondary battery.
  • a rechargeable battery is a battery that repeatedly performs charging and discharging, unlike a primary battery.
  • the secondary battery has an electrode assembly for charging and discharging in a case, and coupled to the opening of the case to the cap plate, the negative and positive terminals connected to the electrode assembly are drawn out of the cap plate, and the negative terminal.
  • the cap plate is formed to allow external shorting at the external shorting section.
  • the cap plate is also electrically connected to the positive terminal, has a positive nature with the case, and is electrically insulated from the negative terminal.
  • the external short circuit portion is electrically connected to the negative terminal at the outside of the cap plate and remains insulated from the cap plate having the positive electrode property.
  • the external short circuit may maintain an insulating state according to the internal pressure of the secondary battery, and may be switched to the short circuit state.
  • the external short circuit portion includes a shorting tab connected to the negative electrode terminal, a shorting member provided in the shorting hole of the cap plate opposite to the shorting tab, and an insulating member containing the shorting tab to electrically insulate the cap plate.
  • the external short circuit part further includes an insulating cover for inserting and installing a shorting tab connected to the negative electrode terminal to the insulating member and covering the shorting tab by being formed of an electrical insulating material on top of the shorting tab and being coupled to the insulating member.
  • the external short circuit forms a structure in which the insulating member and the insulating cover are manufactured as individual components to assemble the negative terminal and the cap plate, the manufacturing cost can be increased due to the increase in the number of components.
  • the external short circuit portion forms a passage between the shorting tab and the insulating cover by providing a step and a gap between the projection of the shorting tab and the projection of the insulating cover, and lengthens the length of the passage, thereby preventing the infiltration of external moisture. Enable discharge.
  • One aspect of the present invention is to provide a secondary battery that can reduce the number of parts in the external short circuit, and stably secure the discharge of the internal air while preventing the penetration of external moisture.
  • a secondary battery for charging and discharging a current
  • a case accommodating the electrode assembly, a first electrode terminal and a second electrode coupled to the opening of the case and connected to the electrode assembly
  • a cap plate withdrawing the terminal to the outside and electrically connected to the second electrode terminal, a shorting tab electrically connected to the first electrode terminal at the outside of the cap plate, and a shorting member in the shorting hole of the cap plate.
  • an external short circuit that short-circuits the short circuit member to the short circuit tab when the pressure resistance is set, wherein the external short circuit part electrically insulates the short circuit tab to block external moisture from entering and discharge air therein.
  • a living hinge connected to the insulating body to block external moisture from flowing between the insulating body and the insulating body. And an insulating cover to be joined.
  • the living hinge may be formed in an extension part extending outward from the insulating body to open and close the insulating cover.
  • the insulating body is disposed in close contact with the outer surface of the cap plate to block the inflow of water from the outside, the first side wall having a first height connected to the living hinge, and the first side wall extending from the first side wall to discharge the air therein. It may include a passage connected to the negative and the discharge hole.
  • the extension part may further include a protrusion that protrudes toward the cap plate at a height set along an outer side of the discharge hole to extend the discharge hole.
  • the insulating cover may further include a second side wall having a second height smaller than the first height so as to block external moisture and being coupled to the inner surface of the first side wall of the insulating body by an outer surface.
  • the insulating body may further include a stepped portion formed along the outer side of the shorting tab in the first side wall to cover the outer side of the shorting tab on the lower side and supporting the second side wall on the upper side.
  • the shorting tab may include a tab protrusion protruding to a height set in an outward direction corresponding to the shorting hole and having a corresponding hole corresponding to the shorting hole.
  • the insulating cover may further include a third side wall that protrudes in succession to the outside of the tab protrusion.
  • the third side wall may include a connection groove connecting the inside and the outside of the third side wall between the tab protrusion and the living hinge to discharge air therein.
  • An inner surface of the third side wall and an outer surface of the tab protrusion may form a gap therebetween to connect the tab protrusion to the connection groove.
  • the third side wall may be in close contact with the shorting tab between the tab protrusion and the first electrode terminal to block external moisture from entering.
  • the insulating cover may include ribs that are formed at a height corresponding to the third side wall in the second side wall to support the shorting tab.
  • the short tab may include a rivet hole coupled to the rivet terminal of the first electrode terminal on the opposite side of the tab protrusion, and may include fixing holes coupled to a fixing protrusion protruding from the insulating body.
  • the first side wall of the insulating body and the third side wall of the insulating cover may primarily block the penetration of external moisture, and the tab protrusion of the shorting tab may secondarily block the penetration of external moisture.
  • the secondary steel member is installed inside the case of the secondary battery, and it is possible to fix the protruding end of the current collecting tab while reinforcing the strength of the case. Therefore, even when an external force is applied from the outside of the case, the lead tab and the electrode assembly are prevented from being deformed and damaged, thereby improving durability of the secondary battery. It blocks the inflow of water and exhausts the air inside, and connects the insulating cover to the insulating body by a living hinge (living hinge), so that the rotation coupling is effective to block the external water inflow between the insulating body.
  • the insulating body and the insulating cover connected to the living hinge can reduce the number of components constituting the external short circuit, and stably ensure the discharge of the internal air while preventing the penetration of external moisture.
  • FIG. 1 is a perspective view of a rechargeable battery according to an exemplary embodiment of the present invention.
  • FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1.
  • FIG. 3 is a partial perspective view illustrating in detail the combination of the external short circuit of FIG.
  • FIG. 4 is a partial perspective view of the outer short circuit of FIG. 3.
  • FIG. 5 is a partial cross-sectional view taken along the line VV of FIG. 3.
  • FIG. 6 is a partial cross-sectional view taken along the line VI-VI of FIG. 4.
  • FIG. 7 is a plan view of a state in which an external short circuit portion is coupled.
  • FIG. 8 is a partial cross-sectional view taken along the line VIII-VIII of FIG. 7.
  • a rechargeable battery according to an embodiment includes an electrode assembly 10 for charging and discharging current, a case 15 containing the electrode assembly 10, and a cap coupled to an opening of the case 15.
  • the first electrode terminal 21 hereinafter referred to as "cathode terminal”
  • the second electrode terminal 22 hereinafter referred to as "anode terminal”
  • the external short circuit portion 40 is provided on the cathode terminal 21 side from the outside of the cap plate 20.
  • the electrode assembly 10 arranges the first electrode 11 (hereinafter referred to as “cathode”) and the second electrode 12 (hereinafter referred to as “anode”) on both sides of the separator 13 as an insulator. Then, the stacked negative electrode 11, separator 13 and positive electrode 12 are rolled off in a jellyroll state.
  • the negative electrode 11 and the positive electrode 12 are coated portions 11a and 12a each of which coated the active material on the current collectors of the metal thin films Cu and Al, and an uncoated portion formed of the current collector exposed by not applying the active material. 11b, 12b).
  • 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.
  • the uncoated portion 12b of the anode 12 is formed at one end of the anode 12 along the anode 12 to be wound.
  • the uncoated portions 11b and 12b are disposed at both ends of the electrode assembly 10, respectively.
  • 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 case 15.
  • 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 terminal holes H1 and H2.
  • 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 vent hole 24 is closed by a vent plate 25 that can be cut to exhaust the internal pressure and air of the secondary battery.
  • a vent plate 25 that can be cut to exhaust the internal pressure and air of the secondary battery.
  • the vent plate 25 has a notch 25a for inducing an incision.
  • the negative electrode terminal 21 and the positive electrode terminal 22 are electrically connected to the negative and positive electrodes 11 and 12 of the electrode assembly 10, respectively, and are installed in the terminal holes H1 and H2 of the cap plate 20, respectively. Therefore, the electrode assembly 10 is electrically drawn out of the cap plate 20 and the case 15 through the negative terminal 21 and the positive terminal 22.
  • the negative terminal 21 and the positive terminal 22 form the same structure with each other inside the cap plate 20, and form different structures with the outside of the cap plate 20. Therefore, the same structures are described together, and the other structures may be described separately, respectively.
  • 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 extending broadly at and the plate terminals 21c and 22c disposed outside the cap plate 20 and 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 prevent leakage of the electrolyte through the terminal holes H1 and H2 even though the negative and positive terminals 21 and 22 are installed in the cap plate 20. .
  • the negative lead tabs 71 and 72 electrically connect the negative and positive terminals 21 and 22 to the uncoated portions 11b and 12b of the negative and positive electrodes 11 and 12 in the electrode assembly 10, respectively. That is, the positive and negative lead tabs 71 and 72 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 71 and 72 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 71 and 72 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 71 and 72, 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 top plate 46 will be described in relation to the rivet terminal 22a and the plate terminal 22c of the positive terminal 22, and the rivet terminal 21a and the plate terminal 21c of the negative terminal 21 will be described.
  • the external short circuit section 40 will be described.
  • the top plate 46 on the positive electrode terminal 22 side is formed of a conductor to electrically connect the plate terminal 22c of the positive electrode terminal 22 and the cap plate 20.
  • the top plate 46 is interposed and electrically insulated between the plate terminal 22c and the cap plate 20 to penetrate 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 positive electrode 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 and the cap plate 20 through the plate terminal 22c. Therefore, the cap plate 20 has an anode property.
  • FIG. 3 is a partial perspective view of the external short circuit of FIG. 1 in detail
  • FIG. 4 is a partial perspective view of the external short circuit of FIG. 3.
  • the external short circuit portion 40 includes a short circuit tab 41 and a short circuit member 43 spaced apart or shorted according to the internal pressure of the secondary battery.
  • the short tab 41 is electrically connected to the rivet terminal 21a of the negative electrode terminal 21 and is disposed in an insulating structure on the outside of the cap plate 20 to have negative electrode properties.
  • the external short circuit portion 40 further includes an insulating body 51 formed of an electrical insulating material, and an insulating cover 53 of an electrical insulating material connected to the insulating body 51 by a living hinge 52.
  • the insulating body 51 is installed between the shorting tab 41 on the outside of the cap plate 20 and is coupled with the insulating cover 53 on the upper side of the shorting tab 41, thereby providing a negative electrode property. Electrically insulate the cap plate 20 having an anode property from the 41 and at the same time protect the short tab 41.
  • the insulating body 51 may be installed on the cap plate 20 via the insulating gasket 55.
  • the shorting tab 41 and the plate terminal are placed on the cap plate 20 by coupling the shorting tab 41 and the plate terminal 21c to the top of the rivet terminal 21a and caulking the top. 21c is coupled to the upper end of the rivet terminal 21a. That is, the shorting tab 41 and the plate terminal 21c are fixed to the cap plate 20 with the insulating body 51 of the external shorting portion 40 interposed therebetween.
  • the short circuit member 43 is installed in the short circuit hole 42 to close the short circuit hole 42 formed in the cap plate 20.
  • the shorting tab 41 is mechanically and electrically connected to the negative terminal 21 and extends along the outside of the shorting member 43.
  • the shorting tab 41 and the shorting member 43 correspond to the shorting holes 42, maintain the spaced apart state (solid line state) to face each other, and invert the shorting member 43 when the internal pressure of the secondary battery rises.
  • a short circuit state (virtual line state) can be formed.
  • the external short circuit portion 40 is connected to the short circuit tab 41 and the short circuit hole 42 of the cap plate 20 that are mechanically and electrically connected to the negative electrode terminal 21 from the outside of the cap plate 20. It is provided with 43, the short circuit member 43 can be reversed and short-circuited to the short-circuit tab 41 at the set withstand pressure action.
  • the insulating body 51 electrically insulates the shorting tab 41 to prevent external moisture from entering the inside of the external shorting part 40 and externally cools the air inside the secondary battery and the external shorting part 40. It is configured to be discharged.
  • the insulating cover 53 is connected to the living hinge 52 provided at one side of the insulating body 51, rotated at the living hinge 52, and coupled to the upper side of the insulating body 51. Therefore, the external moisture is blocked from flowing between the insulating body 51 and the insulating cover 53 and blocked, and the internal pressure and air of the secondary battery may be discharged to the outside through the external short circuit 40.
  • FIG. 5 is a partial cross-sectional view taken along the line VV of FIG. 3
  • FIG. 6 is a partial cross-sectional view taken along the line VI-VI of FIG. 4.
  • the living hinge 52 is integrally formed with an extension part 54 extending outward from the insulating body 51 to open and close the insulating cover 53.
  • the living hinge 52 is connected to and formed by the extension 54 formed integrally with the insulating body 51 and the insulating cover 53, thereby enabling the opening and closing of the insulating cover 53 in the insulating body 51.
  • external moisture may be prevented from penetrating between the insulating body 51 and the insulating cover 53.
  • the insulating body 51 includes a first side wall 511, a passage 512, and a discharge hole 513. Since the first side wall 511 is disposed in close contact with the outer surface of the cap plate 20 with the first height H11, external moisture may be prevented from entering the interior of the insulating body 51. Since the living hinge 52 is connected to and formed by the extension 54 extending outward from the upper end of the first side wall 511, external moisture may be prevented from flowing into the insulating body 51.
  • the passage 512 is formed by connecting the extension portion 54 at the upper end of the first side wall 511 to discharge the air inside the insulating body 51 from the external short circuit portion 40 to the outside.
  • the discharge hole 513 penetrates outwardly from the passage 512 of the extension part 54.
  • the extension part 54 further includes a protrusion 514 protruding toward the cap plate 20 at a height ⁇ H1 set along the outer side of the discharge hole 513.
  • the protrusion 514 further extends the discharge hole 513.
  • protrusion 514 having the discharge hole 513 protrudes toward the cap plate 20 from the side of the first side wall 511, external moisture is removed together with the first side wall 511 and the extension 54. It is possible to more effectively block the flow into the inside of the one side wall 511.
  • the insulation cover 53 further includes a second side wall 531 having a second height H12 to prevent the external moisture from penetrating upward of the external short circuit portion 40 together with the insulation body 51.
  • the second height H12 is smaller than the first height H11.
  • the second side wall 531 is forcibly fitted to the inner surface of the first side wall 511 of the insulating body 51 to the outer surface, the insulating body 51 and the insulating cover 53 are coupled to each other (that is, the outer edge of the insulating cover 51). Moisture permeation can be prevented.
  • the insulating body 51 further includes a stepped portion 516 inside the first side wall 511.
  • the stepped part 516 is formed along the outer side of the shorting tab 41 to cover the outer side of the shorting tab 41 downward and to support the second side wall 531 upward.
  • the insulating body 51 may be molded by insert injection, in which the shorting tab 41 is inserted into a mold and molded.
  • the insulating gasket 55 may be coupled to the lower side of the insulating body 51.
  • the insulating gasket 55 may be interposed on the lower side of the short tab 41 corresponding to the stepped part 516 to improve electrical insulation performance of the short tab 41 and the cap plate 20.
  • the shorting tab 41 further includes a tab protrusion 411 protruding at a height ⁇ H2 set in the outward direction corresponding to the shorting hole 42 of the cap plate 20.
  • the tab protrusion 411 may block the penetration of external moisture.
  • the tab protrusion 411 has a corresponding hole 412 corresponding to the short-circuit hole 42, so that when the short-circuit operation by the inversion of the short-circuit member 43, the internal pressure of the secondary battery and via the cap plate 20 And air may be discharged to the corresponding hole 412.
  • the insulating cover 53 further includes a third side wall 533 which protrudes in succession to the outside of the tab protrusion 411.
  • the third side wall 533 has a connection groove 534 for discharging the air therein.
  • the connecting groove 534 connects the inside and the outside of the third side wall 533 between the tab protrusion 411 and the living hinge 52. That is, the connecting groove 534 sets a passage between the upper surface of the lower short tab 41 and discharges the internal air blown out to the corresponding hole 412 of the short tab 41 to the outside.
  • the inner surface of the third side wall 533 and the outer surface of the tab protrusion 411 form a gap G therebetween to connect the tab protrusion 411 and the corresponding hole 412 to the connection groove 534, thereby Allow the air to escape to the outside.
  • FIG. 7 is a plan view of a state in which an external short circuit unit is coupled
  • FIG. 8 is a partial cross-sectional view taken along the line VIII-VIII of FIG. 7. 3 to 8, the third side wall 533 of the insulating cover 53 is in close contact with the upper surface of the short-circuit tab 41 between the tab protrusion 411 and the negative electrode terminal 21, thereby causing a gap G. Nevertheless, external moisture may be prevented from flowing into the tab protrusion 411.
  • the external short circuit part 40 discharges the internal air through the gap G, the connection groove 534, the passage 512, and the discharge hole 513 (EX) and at the same time, the first of the insulating body 51.
  • the first side wall 533 of the side wall 511 and the insulating cover 53 blocks the ingress of external moisture (B1), and the second protrusion of the external tabs by the tab protrusion 411 of the shorting tab 41.
  • the insulating cover 53 includes ribs 535 formed at a height corresponding to the third side wall 533 in the second side wall 531.
  • the ribs 535 may stably support the shorting tab 41 to the bottom thereof.
  • the shorting tab 41 has a rivet hole 413 and fixing holes 414 on the opposite side of the tab protrusion 411.
  • the rivet hole 413 is coupled to the rivet terminal 21a of the negative terminal 21 to enable the withdrawal of the negative terminal 21.
  • the fixing holes 414 are coupled to the fixing protrusion 515 protruding from the insulating body 51 to firmly fix the shorting tab 41 to the insulating body 51.
  • the insulating cover 53 is provided with a through hole 536 in the adjacent side of the negative electrode terminal 21, it is possible to check the current and resistance through the short-circuit tab 41 in the secondary battery.
  • electrode assembly 11 electrode assembly 11
  • second electrode negative, anode
  • first and second electrode terminals negative and positive terminal
  • vent plate 25a notch
  • fixing protrusion 516 stepped portion
  • H11, H12 first and second heights ⁇ H1, ⁇ H2: heights

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

Selon un mode de réalisation de la présente invention, une batterie rechargeable comprend : un ensemble d'électrodes qui charge et décharge un courant ; un boîtier qui reçoit l'ensemble d'électrodes ; une plaque de recouvrement qui est accouplée à une ouverture du boîtier afin d'exposer, à l'extérieur, une première borne d'électrode et une seconde borne d'électrode connectée à l'ensemble d'électrodes, et qui est électriquement connectée à la seconde borne d'électrode ; et une partie court-circuit externe qui comporte une languette de court-circuit et un élément de court-circuit, la languette de court-circuit étant électriquement connectée à la première borne d'électrode à l'extérieur de la plaque de recouvrement, et l'élément de court-circuit étant dans un trou de court-circuit de la plaque de recouvrement, et qui sépare l'élément de court-circuit de la languette de court-circuit lorsqu'une pression interne prédéfinie est appliquée, la partie court-circuit externe comprenant un corps isolant et un couvercle isolant, le corps isolant recevant la languette de court-circuit afin de l'isoler électriquement, bloquant ainsi l'humidité pénétrant de l'extérieur et évacuant l'air interne, et le couvercle isolant étant accouplé en rotation au corps isolant en étant connecté à ce dernier au moyen d'une charnière mobile afin de bloquer l'humidité de l'extérieur pénétrant entre le corps isolant et le couvercle isolant.
PCT/KR2017/006415 2016-06-24 2017-06-19 Batterie rechargeable WO2017222260A1 (fr)

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KR10-2016-0079651 2016-06-24
KR1020160079651A KR102574484B1 (ko) 2016-06-24 2016-06-24 이차 전지

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WO2017222260A1 true WO2017222260A1 (fr) 2017-12-28

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KR (1) KR102574484B1 (fr)
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CN108428826A (zh) * 2018-01-18 2018-08-21 宁德时代新能源科技股份有限公司 二次电池顶盖组件、二次电池及汽车
CN108428825A (zh) * 2018-01-18 2018-08-21 宁德时代新能源科技股份有限公司 二次电池顶盖组件、二次电池及汽车
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EP3514848A1 (fr) * 2018-01-18 2019-07-24 Contemporary Amperex Technology Co., Limited Ensemble de couvercle de batterie secondaire, batterie secondaire et véhicule
EP3598523A1 (fr) * 2018-01-18 2020-01-22 Contemporary Amperex Technology Co., Limited Ensemble de couvercle de batterie secondaire, batterie secondaire et véhicule
US10756327B2 (en) 2018-01-18 2020-08-25 Contemporary Amperex Technology Co., Limited Secondary battery top cover assembly, secondary battery and vehicle
US10756312B2 (en) 2018-01-18 2020-08-25 Contemporary Amperex Technology Co., Limited Secondary battery top cover assembly, secondary battery and vehicle
CN111799401A (zh) * 2018-01-18 2020-10-20 宁德时代新能源科技股份有限公司 二次电池顶盖组件、二次电池及汽车
CN111916587A (zh) * 2018-01-18 2020-11-10 宁德时代新能源科技股份有限公司 二次电池顶盖组件、二次电池及汽车
CN111916587B (zh) * 2018-01-18 2021-08-03 宁德时代新能源科技股份有限公司 二次电池顶盖组件、二次电池及汽车
CN111799401B (zh) * 2018-01-18 2021-08-17 宁德时代新能源科技股份有限公司 二次电池顶盖组件、二次电池及汽车
US11688914B2 (en) * 2018-01-18 2023-06-27 Contemporary Amperex Technology Co., Limited Secondary battery top cover assembly, secondary battery and vehicle
CN108428826B (zh) * 2018-01-18 2023-12-29 宁德时代新能源科技股份有限公司 二次电池顶盖组件、二次电池及汽车
CN108428825B (zh) * 2018-01-18 2024-01-02 宁德时代新能源科技股份有限公司 二次电池顶盖组件、二次电池及汽车

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