WO2008106835A1 - An improved battery mouth-sealing assembly and a battery including the same - Google Patents

An improved battery mouth-sealing assembly and a battery including the same Download PDF

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Publication number
WO2008106835A1
WO2008106835A1 PCT/CN2007/001513 CN2007001513W WO2008106835A1 WO 2008106835 A1 WO2008106835 A1 WO 2008106835A1 CN 2007001513 W CN2007001513 W CN 2007001513W WO 2008106835 A1 WO2008106835 A1 WO 2008106835A1
Authority
WO
WIPO (PCT)
Prior art keywords
explosion
proof
insulating member
sealing
battery
Prior art date
Application number
PCT/CN2007/001513
Other languages
English (en)
French (fr)
Inventor
Huanyu Mao
Fuyong Liu
Junfeng Zhao
Original Assignee
Shenzhen Bak Battery 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 Shenzhen Bak Battery Co., Ltd filed Critical Shenzhen Bak Battery Co., Ltd
Priority to JP2009551091A priority Critical patent/JP2010520579A/ja
Priority to US12/529,520 priority patent/US20100233530A1/en
Priority to EP07721086A priority patent/EP2133936A4/en
Publication of WO2008106835A1 publication Critical patent/WO2008106835A1/zh

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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
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/107—Primary casings; Jackets or wrappings characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
    • 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
    • H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
    • H01M50/169—Lids or covers characterised by the methods of assembling casings with lids by welding, brazing or soldering
    • 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
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • H01M50/117—Inorganic material
    • H01M50/119—Metals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
    • H01M50/171—Lids or covers characterised by the methods of assembling casings with lids using adhesives or sealing agents
    • 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
    • H01M2200/00—Safety devices for primary or secondary batteries
    • H01M2200/10—Temperature sensitive devices
    • H01M2200/106—PTC
    • 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
    • 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 battery sealing assembly and battery having a safety device. - Background technique
  • an explosion-proof device (also referred to as an explosion-proof assembly) capable of discharging gas by opening the valve body when the internal pressure of the battery exceeds a set value has been designed.
  • the explosion-proof cover assembly having the above-mentioned explosion-proof device and the battery container are sealed by mechanical flange fastening.
  • the battery in which the above-mentioned explosion-proof device can be used is a battery of a battery container having high mechanical strength, and the most common one is a cylindrical steel-shell battery container.
  • the mechanical flange is not suitable for sealing, the above-mentioned explosion-proof device cannot be applied to a battery container made of a soft material such as aluminum or aluminum alloy. battery.
  • batteries having a low mechanical strength of the current battery container do not use a mechanical flanged seal, but a welded seal is used, and no safety device is provided on the cover assembly of the battery. Therefore, such batteries have safety concerns.
  • the existing explosion-proof device and the other components constituting the explosion-proof cap assembly are not structurally independent, the explosion-proof device cannot be separately fabricated in advance, which causes assembly difficulties and influences. Assembly work efficiency.
  • the object of the present invention is to overcome the technical drawbacks of the above prior art that an explosion-proof device cannot be provided on a cap assembly having a small mechanical strength of a battery container, and to provide a battery container having high mechanical strength, such as a steel-shell battery container. Still strong against machinery A lower battery container, such as a battery container made of aluminum, aluminum alloy, or the like, can be used with a full-device battery sealing assembly.
  • another object of the present invention is to provide a battery sealing assembly including a sealing seat and an explosion-proof assembly, and the structures of the sealing seat and the explosion-proof assembly are independent and complete, respectively, and are convenient for independent processing and manufacturing, thereby reducing processing costs. Improve the installation efficiency, and the second is to make the sealing seat and explosion-proof components widely applicable to battery containers of various shapes.
  • An improved battery sealing assembly includes an explosion-proof assembly and a sealing plate.
  • the sealing plate is provided with a downwardly extending cylindrical body.
  • the outer side of the sealing plate has a connecting portion that continues to protrude outward relative to the cylindrical body, and the cylindrical body is formed to receive a cavity of the explosion-proof assembly, the lower portion of the cylinder body is bent inwardly to form a bent portion to insulate and seal the explosion-proof component in the cylinder body, and the center of the bent portion has a first through hole
  • the first through hole introduces an electrode to the explosion-proof component, and the sealing plate on the top of the cylinder has a second through hole through which the electrode is taken out from the explosion-proof component.
  • the explosion-proof assembly includes an insulating member, a cap with a hole, a first explosion-proof film and a pull plate that match the inner wall of the cavity, and the insulating member further extends toward the first through hole to form a third through hole.
  • the outer side of the insulating member supports the mesa, the periphery of the cap is electrically connected to the periphery of the first explosion-proof membrane, and is tightly fixed in the annular sealing groove formed between the sealing plate and the bent portion in the cylinder by the insulating member,
  • a pressure relief chamber is formed in the middle between the cap and the first explosion-proof membrane, and the middle portion of the first explosion-proof membrane is electrically connected to the pull plate on the outer support platform of the insulating member via the third through hole.
  • a protrusion is vertically extended at a side wall of the second through hole of the outer support surface of the insulating member adjacent to the sealing plate, and the pull plate and the sealing plate are separated by the protrusion.
  • the explosion-proof assembly includes a first insulating member, a perforated cap, a first explosion-proof membrane, an annular insulating member and a pull plate that match an inner wall of the cavity, the first insulating member having a hollow inner cavity and An inner surface of the inner cavity of the insulating member has an annular sealing groove, the periphery of the perforated cap, the periphery of the first explosion-proof membrane, the periphery of the annular insulating member and the pulling plate are sequentially overlapped, and are tightly pressed into the annular sealing groove.
  • the periphery of the cap is electrically connected to the periphery of the first explosion-proof membrane, and the cap and the explosion-proof membrane form a pressure relief chamber in the middle, and the middle portion of the first explosion-proof membrane is electrically connected to the pull plate through the annular insulating member.
  • the explosion-proof assembly includes a first insulating member, a perforated cap, a first explosion-proof film, a second explosion-proof film, a fastener, and a second insulating member that match an inner wall of the cavity, the first insulation
  • the second insulating member and the fastener each have a hollow inner cavity and have annular sealing grooves on the side walls of the respective inner cavities, and the periphery of the cap is electrically connected to the periphery of the first explosion-proof membrane and is closely pressed and then pressed tightly.
  • a pressure relief chamber is formed in the middle between the cap and the first explosion-proof membrane, and the annular sealing groove of the fastener contains and securely fixes the first An insulating member and a periphery of the second explosion-proof film located at a lower portion of the first insulating member, the first explosion-proof film and the middle portion of the second explosion-proof film are electrically connected, and the annular sealing groove of the second insulating member is contained and tightly fixed The outer portion of the annular seal groove of the fastener.
  • a positive temperature coefficient element is also connected in series between the periphery of the cap and the periphery of the first explosion-proof membrane by press-fitting.
  • the pull plate is provided with a vent hole.
  • Each of the explosion-proof membranes is provided with a score.
  • a battery includes a container, a battery unit housed in the container, and a battery sealing assembly for sealing and discharging current from the battery unit, wherein the battery sealing assembly includes an explosion-proof assembly and a sealing plate, and the sealing plate is disposed downwardly
  • An extended cylinder having a cavity for accommodating the explosion-proof component, wherein a lower portion of the cylinder is bent inwardly to form a bent portion to insulate and seal the explosion-proof component in the cylinder, the bent portion
  • the center has a first through hole through which the electrode is introduced into the explosion-proof component, and the sealing plate on the top of the cylinder has a second through hole through which the electrode is taken out from the explosion-proof component, the sealing plate
  • the outer side has a connecting portion that continues to project outwardly relative to the barrel, and is sealed and fixedly connected to the container by the outwardly projecting connecting portion.
  • the explosion-proof assembly includes an insulating member, a cap with a hole, a first explosion-proof film and a pull plate that match the inner wall of the cavity, and the insulating member further extends toward the first through hole to form a third through hole.
  • the outer side of the insulating member supports the mesa, the periphery of the cap is electrically connected to the periphery of the first explosion-proof membrane, and is tightly fixed in the annular sealing groove formed between the sealing plate and the bent portion in the cylinder by the insulating member,
  • a pressure relief chamber is formed in the middle between the cap and the first explosion-proof membrane, and the middle portion of the first explosion-proof membrane is electrically connected to the pull plate on the outer support platform of the insulating member via the third through hole.
  • a protrusion extending along a side wall of the second through hole on the sealing plate extends perpendicularly from the outer support surface of the insulating member, and the pull plate and the sealing plate are separated by the protrusion.
  • the explosion-proof assembly includes a first insulating member, a perforated cap, a first explosion-proof membrane, a ring-shaped insulating member and a pull plate that match an inner wall of the cavity, the first insulating member having a hollow inner cavity and The side wall of the inner cavity of the first insulating member has an annular sealing groove, and the insulating member further extends toward the first through hole to form an outer supporting surface of the insulating member having the third through hole, the periphery of the perforated cap, the first explosion-proof film
  • the periphery of the annular insulating member and the pull plate are sequentially pressed and tightly pressed into the annular sealing groove, and the periphery of the cap is electrically connected with the periphery of the first explosion-proof film, and the cap is formed between the cap and the explosion-proof film in the middle.
  • the pressure relief chamber, the middle portion of the first explosion-proof membrane is electrically connected to the pull plate through the annular insulating member.
  • the explosion-proof assembly includes a first insulating member, a perforated cap, a first explosion-proof film, a second explosion-proof film, a fastener, and a second insulating member that match an inner wall of the cavity, the first insulation
  • the second insulating member and the fastener each have a hollow inner cavity and have annular sealing grooves on the side walls of the respective inner cavities, and the periphery of the cap is electrically connected to the periphery of the first explosion-proof membrane and is closely pressed and then pressed tightly.
  • a pressure relief chamber is formed in the middle between the cap and the first explosion-proof membrane, and the annular sealing groove of the fastener contains and tightly fixes the first An insulating member and a periphery of the second explosion-proof film located at a lower portion of the first insulating member, the first explosion-proof film and the middle portion of the second explosion-proof film are electrically connected, and the annular sealing groove of the second insulating member is contained and tightly fixed The outer portion of the annular seal groove of the fastener.
  • a positive temperature coefficient element is also connected in series between the periphery of the cap and the periphery of the first explosion-proof membrane by press-fitting.
  • the pull plate is provided with a vent hole.
  • Each of the explosion-proof membranes is provided with a score.
  • the beneficial technical effects of the present invention are: 1.
  • the sealing seat By installing the sealing seat, the explosion-proof component is sealed in the cavity of the sealing seat.
  • the material of the sealing seat can be flexibly controlled according to the needs, and the sealing seat and the battery container of the suitable material can be selected according to the battery container of different materials. Seal or seal by mechanical flange. Therefore, the present invention is suitable for installation on a battery container (such as a steel case) having a high mechanical strength, and is also suitable for mounting a battery container (such as aluminum, aluminum alloy, etc.) having a low mechanical strength.
  • the invention is applicable to batteries of various battery containers, and is not limited by the strength of the battery mechanical container and the shape of the battery, such as a cylindrical aluminum shell battery, a square aluminum shell battery, a cylindrical steel shell electric battery, a square steel shell electric battery, and the like.
  • the explosion-proof component is insulated and sealingly fastened in the sealing seat.
  • the explosion-proof component and the sealing seat are independent and complete structures, one is convenient for independent processing and manufacturing, and, because of the simple structure of the sealing seat, The technology is quite mature, the price is low, the processing cost is low, and the explosion-proof assembly is conveniently and quickly assembled, and the assembly and installation efficiency of the explosion-proof component is greatly improved.
  • the pulling plate is abutted on the outer supporting surface of the insulating member, and the pulling plate is not directly supported on the sealing seat, thereby making the explosion-proof assembly simple and convenient. A separate and complete structure relative to the sealing seat is achieved.
  • the sealing seat adopts a sealing plate and a cylindrical structure extending vertically upward on the sealing plate, and the sealing container is connected through a connecting portion protruding from the outer surface of the sealing plate.
  • the structure of the sealing seat is simpler, which is more convenient for assembling the anti-explosion component conveniently and quickly.
  • the sealing plate structure does not affect the appearance of the sealed battery.
  • the sealing seat adopts a sealing plate and a cylindrical structure extending vertically downward on the sealing plate.
  • the sealing plate is facilitated by the cylindrical body extending into the container. Positioning and convenient welding with the container.
  • the second is to expose the sealing plate instead of exposing the bent part, and the battery has a flatter appearance, providing another novel appearance.
  • the sealing seat can be conveniently designed into any shape, which is the best in round shape, and the circular shape is convenient for processing and manufacturing, and the assembly is convenient.
  • the wall thickness of the sealing seat can be easily adjusted to ensure a good seal in the cavity.
  • DRAWINGS Figure 1 is a block diagram of an improved battery closure assembly.
  • Figure 2 is a structural view of the sealing plate of Figure 1.
  • Figure 3 is a structural view of the explosion-proof assembly of Figure 1.
  • Fig. 4 is a view showing the structure of a battery using the battery sealing assembly of Fig. 1.
  • FIG. 5 is a block diagram of another improved battery closure assembly.
  • Figure 6 is a structural view of the sealing plate of Figure 5.
  • Figure 7 is a diagram showing the structure of a battery using the battery sealing assembly of Figure 5.
  • FIG. 8 is a block diagram of yet another improved battery closure assembly.
  • Figure 9 is a structural view of the cylinder of Figure 8.
  • Fig. 10 is a view showing the structure of a battery using the battery sealing assembly of Fig. 8.
  • Figure 11 is a structural view of an explosion-proof assembly.
  • FIGS. 1-4 An improved battery sealing assembly and battery, as shown in FIGS. 1-4, a battery sealing assembly includes a sealing seat and an explosion-proof assembly, and the sealing seat includes a sealing plate 1 extending upward on the sealing plate 1.
  • the outer surface of the sealing plate 1 has a connecting portion 10 extending outwardly relative to the cylindrical body 11.
  • the cavity 11 defines a cavity 16 therein.
  • the cavity 16 houses an explosion-proof assembly, and the sealing plate in the cylindrical body 11 A support surface 14 is formed, and the sealing plate 1 has a first through hole 15 for introducing an electrode.
  • the end of the cylindrical body 11 is bent toward the center of the cylindrical body 1 to form a bent portion 12 having a second through hole 13 through the second through hole. 13 Take the electrode out of the explosion-proof assembly.
  • An annular seal groove 17 is formed between the bent portion 12 and the support table 14. The explosion-proof assembly is as shown in FIG. 3.
  • the explosion-proof assembly includes an insulating member 6 that matches the inner wall of the cylinder 11, a cap 4 with a hole 41, a positive temperature coefficient element 5, a first explosion-proof membrane 3, and a pull plate 2,
  • the function of the positive temperature coefficient element 5 is to achieve the effect of reducing or cutting off the discharge current when the battery temperature reaches a predetermined temperature, and the insulating member 6 further extends toward the first through hole 15 to form an outer support of the insulator having the third through hole 62.
  • the table 61, the periphery of the cap 4 contained in the insulating member 6, and the positive temperature coefficient element 5 are electrically connected to the periphery of the first explosion-proof film 3.
  • the explosion-proof film 3 can be made of aluminum. Or a conductive material such as copper, the explosion-proof membrane 3 is provided with a score 31, and the cracking performance of the first explosion-proof membrane 3 can be precisely controlled by changing the depth of the score 31, and the cap 4 and the first explosion-proof membrane 3 are in the middle.
  • a pressure relief chamber 42 is formed.
  • the middle portion of the first explosion-proof membrane 3 is welded to the pull plate 2 abutting on the outer support surface 61 of the insulating member 6 via the third through hole 62.
  • the insulating member 6 is provided with a protruding portion 63.
  • the blasting membrane 3 is provided with a venting hole 21 on the pulling plate 2. If necessary, the venting hole 21 may not be provided on the pulling plate 2, for example, the contact position between the pulling plate 2 and the insulating member 6 is set to be uneven, so that the air pressure can be Balanced by the gap between them.
  • the insulating member 6 is tightly fixed in the annular seal groove 17 formed between the bent portion 12 and the support table 14. A battery fabricated by using the above battery sealing assembly, as shown in FIG.
  • the structure of the battery sealing assembly includes a sealing seat and an explosion-proof assembly. As shown in FIG.
  • the sealing seat includes a sealing plate 1 a cylindrical body 11 extending downwardly on the sealing plate 1.
  • the outer side surface of the sealing plate 1 has a connecting portion 10 extending outwardly with respect to the cylindrical body 11, and a cavity 16 is formed in the cylindrical body 11, and the cavity 16 is received therein.
  • the explosion-proof assembly the lower portion of the cylinder 11 is bent inwardly to form the bent portion 12 to insulate and seal the explosion-proof assembly into the cylindrical body 11.
  • the center of the bent portion 12 has a first through hole 15 through The first through hole 15 introduces an electrode to the explosion-proof assembly, and the sealing plate 1 at the top of the cylindrical body 11 has a second through hole 13 through which the electrode is taken out from the explosion-proof assembly.
  • An annular seal groove 17 is formed between the sealing plate 1 having the second through hole 13 and the bent portion 12.
  • the structure of the explosion-proof assembly is the same as that of the embodiment 1.
  • Fig. 7 shows a battery fabricated by using the above battery sealing assembly, comprising an aluminum casing container 7, a battery unit 8 housed in the aluminum casing container 7, a battery sealing assembly for sealing the container 7 and drawing current from the battery unit 8, and a lower portion.
  • the cover plate 9 is mounted on the lower cover 9 via the insulating member 91.
  • the structure of the battery sealing assembly is as shown in Figs. 5 and 6, and the aluminum shell container 7 and the outer side of the sealing plate 1 are convexly connected. 10 Welding, one electrode 81 of the battery unit 8 is electrically connected to the pull plate 2, and the other electrode 81 of the battery unit 8 is electrically connected to the pole 91.
  • the battery sealing assembly of this embodiment is substantially in an "inverted" configuration of the battery sealing assembly of the first embodiment from the viewpoint of the outer shape.
  • this "inverted" structure has the following beneficial effects: 1. When sealing and welding with the battery container, since the cylindrical body 11 protrudes into the container 7, the positioning between the sealing plate 1 and the container 7 is facilitated and the connection is facilitated. . 2. The sealing plate 1 is exposed, instead of the exposed portion 12, the battery has a flatter appearance and provides another novel appearance.
  • Embodiment 3 another improved battery sealing assembly and battery, as shown in FIGS.
  • the structure of the battery sealing assembly comprises a sealing seat 1 and an explosion-proof assembly
  • the sealing seat 1 comprises a cylinder 11 having a cavity 16, a cylinder
  • the upper portion of the body 11 is bent inwardly to form a bent portion 12, and a lower portion of the tubular body 11 extends inwardly perpendicular to the tubular body 11 to form a support table surface 14, and an annular seal groove 17 is formed between the bent portion 12 and the support table 14.
  • the explosion-proof assembly is insulated and sealingly fastened into the cylinder 11 through the annular sealing groove 17, and the center of the bottom of the cylinder 11 has a first through hole 15 through which the electrode is introduced to the explosion-proof assembly, the top of the cylinder 11 There is a second through hole 13 through which the electrode is taken out from the explosion-proof assembly, and a central portion of the outer surface of the cylindrical body 11 has a convex annular connecting portion 10.
  • the structure of the explosion-proof assembly is the same as that of the embodiment 1.
  • the 10 is a battery fabricated by using the above battery sealing assembly, 'comprising an aluminum casing container 7, a battery unit 8 housed in the aluminum casing container 7, a battery sealing assembly for sealing the container 7 and drawing current from the battery unit 8,
  • the lower cover 9 and the pole 91 are mounted on the lower cover 9 through the insulating member 91.
  • the structure of the battery sealing assembly is as shown in FIGS. 8 and 9.
  • the aluminum casing 7 and the outer surface of the sealing plate 1 are convexly ring-shaped.
  • the connecting portion 10 is soldered, and one electrode 81 of the battery unit 8 is electrically connected to the pull plate 2, and the other electrode 81 of the battery unit 8 is electrically connected to the pole 91.
  • the first insulating member 234 has a hollow inner cavity and has an annular sealing groove on the sidewall of the inner cavity of the first insulating member 234, a periphery of the cap 233 with the hole 210, a periphery of the first explosion-proof film 225, and an annular insulation.
  • the periphery of the member 240 and the pull plate 224 are sequentially pressed and tightly pressed into the annular seal groove of the first insulating member, and the periphery of the cap 233 is electrically connected to the periphery of the first explosion-proof film 225, the cap 233 and the explosion-proof film.
  • a pressure relief chamber 226 is formed in the middle of the 225, and a venting hole 2241 is formed in the pulling plate 224.
  • the pulling plate 224 abuts against the insulating member 240 and is weldedly connected to the center of the first explosion-proof membrane 225.
  • the explosion-proof membrane 225 has a score 227, and the cracking performance of the first explosion-proof membrane 225 can be precisely controlled by changing the depth of the score 227.
  • This embodiment provides an explosion-proof assembly which is simple in structure and easy to manufacture, and can be easily assembled in the sealing seat described in each of the foregoing embodiments.
  • Embodiment 5 another explosion-proof assembly, as shown in FIG. 12, includes a first insulating member 423, a cap 437 with a hole 4271, a positive temperature coefficient original 424, a first explosion-proof film 421 having a notch 421b, and an engraved
  • the second explosion-proof membrane 422, the fastener 428, the second insulator 430, the first insulator 423, the second insulator 430, and the fastener 428 of the trace 422b each have a hollow inner cavity and are on the side of the respective inner cavity
  • the wall has an annular sealing groove, wherein the periphery of the cap 437, the periphery of the positive temperature coefficient original 424, and the periphery of the first explosion-proof membrane 421 are sequentially laminated and electrically connected and overlapped to tightly press the first insulating member contained in the cylindrical structure.
  • a pressure relief chamber 440 is formed in the middle between the cap 437 and the first explosion-proof membrane 421, and the first insulation member 423 and the periphery of the second explosion-proof membrane 422 located at the lower portion of the first insulation member 423 are tightly contained.
  • the first explosion-proof membrane 421 is fixedly connected to the second explosion-proof membrane 422 through its connecting portion 422a through its connecting portion 421a, and the fastener 428 is processed by mechanical flange cutting.
  • One 423 wherein the fastening the shaped insulating member, the outer circumference of the cylindrical fastener 428 is a second insulating member 430 accommodating the insulation pack.
  • This embodiment further improves the reliability and safety of the explosion-proof assembly by the protection of the first and second double-stage explosion-proof membranes.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Gas Exhaust Devices For Batteries (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Description

一种改进的电池封口组件及电池 技术领域
本发明涉及具有安全装置的电池封口组件及电池。 - 背景技术
随着音频、 摄像机设备、 个人计算机等电子设备向轻便化、 可移动化方向的急速发展， 高 容量化的以各种碱性电池、 锂二次电池为代表的非水解液二次电池成为这些电子设备驱动电源 之首选。
由于这种髙容量电池密闭在一封闭容器内， 当充电器出现过分充电或误使用等故障时， 常 会在电池内部产生异常气体， 异常气体的聚集会使电池内部产生过大的压力， 从而存在因电池 破裂给电子设备或人带来损伤之类的危险。 为防止上述事故的发生， 人们已在这种电池上设计 有当电池内部压力超过设定值时， 能够通过打开阀体排出气体的防爆装置 (又称防爆组件)。
中国专利 CN2411578Y (圆柱型锂离子电池防爆盖）、 CN1142601C (封闭电池）、 CN1144302C (封闭式电池用防爆封口板及其制造方法）和 CN1156037C σ方爆安全阀装置及采用它的封闭 式二次电池） 公开了多种不同结构的具有防爆功能、 用于密封电池的防爆装置， 采用上述防爆 装置的电池当内部压力上升时， 可以切断电流； 切断电流后，如果电池内部压力仍然持续升高， 当压力超过防爆膜能够承受的预定压力时， 防爆膜撕裂， 电池泄压， 从而避免电池爆炸。
目前， 具有上述防爆装置的防爆盖组件与电池容器之间都是采用机械翻边扣合方式完成密 封。 但是， 遗憾的是， 由于电池容器的壁厚受到一定限制， 能够采用上述防爆装置的电池均为 机械强度高的电池容器的电池， 最为普遍的是圆柱形钢壳电池容器。 而对于采用机械强度小的 如铝、 铝合金等材质制作电池容器的电池， 由于不宜采用机械翻边方式封口， 因此上述防爆装 置无法应用于以铝、 铝合金等质软材质制作的电池容器的电池。
由于上述原因， 目前电池容器机械强度小的电池不采用机械翻边的封口， 而采用焊 接封口， 在这种电池的盖板组件上没有设置安全装置。 因此， 此类电池存在安全上的隐 患。
此外， 由于现有防爆装置与构成防爆盖组件的其它组成部分（如用于密封电池容器 的密封件） 之间在结构上不具有相互独立性， 防爆装置不能预先单独制作， 造成装配困 难， 影响装配工作效率。
发明内容
' 本发明的目的意在克服上述现有技术不能在电池容器机械强度小的盖组件上设置防爆装置 的技术缺陷， 提供一种无论对机械强度高的电池容器， 如： 采用钢壳电池容器， 还是对机械强 度较低的电池容器， 如采用铝、 铝合金等制作的电池容器， 都能够适用的具有 全装置的电池 封口组件。
进一步地，本发明的另一目的在于提出一种包括封口座和防爆组件的电池封口组件， 且该封口座和防爆组件的结构各自独立、 完整， 一是便于各自独立加工制造， 降低加工 成本， 提高安装效率， 二是使封口座和防爆组件都能广泛适用于各种形状的电池容器。
实现上述目的的技术方案：
一种改进的电池封口组件， 包括防爆组件和封口板， 在封口板上设置有向下延伸的 筒体， 封口板的外侧面相对于筒体具有继续向外凸出的连接部， 筒体内形成容纳所述防 爆组件的空腔， 所述筒体的下部通过向内弯折形成弯折部从而将防爆组件绝缘、 密封地 紧固于筒体内， 弯折部的中心具有第一通孔， 通过所述第一通孔向防爆组件引入电极， 所述筒体内顶部的封口板上具有第二通孔， 通过所述第二通孔从防爆组件引出电极。
所述防爆组件包括与所述空腔的内壁相吻合的绝缘件、 带孔的帽盖、 第一防爆膜和 拉板， 绝缘件向第一通孔的方向进一步延伸形成具有第三通孔的绝缘件外侧支撑台面， 所述帽盖的周边与第一防爆膜的周边电连接且通过绝缘件紧密固定在所述筒体内的封口 板与弯折部之间形成的环形密封槽内，所述帽盖与第一防爆膜之间在中部形成一泄压室， 所述第一防爆膜的中部经第三通孔与抵顶在绝缘件外侧支撑台上的拉板电连接。
所述绝缘件外侧支撑台面上靠近封口板的第二通孔的侧壁处垂直延伸出有凸起， 通 过所述凸起隔离拉板和封口板。
所述防爆组件包括与所述空腔的内壁相吻合的第一绝缘件、 带孔的帽盖、 第一防爆 膜、 环形绝缘件和拉板， 第一绝缘件具有中空的内腔及在第一绝缘件内腔的侧壁上具有 环形密封槽， 带孔帽盖的周边、 第一防爆膜的周边、 环形绝缘件和拉板的周边依顺序重 叠后紧密压合在所述环形密封槽内， 帽盖的周边与第一防爆膜的周边电连接， 帽盖与防 爆膜之伺在中部形成泄压室， 所述第一防爆膜的中部穿过环形绝缘件与拉板电连接。
所述防爆组件包括与所述空腔的内壁相吻合的第一绝缘件、 带孔的帽盖、 第一防爆 膜、 第二防爆膜、 紧固件和第二绝缘件， 所述第一绝缘件、 第二绝缘件和紧固件都具有 中空的内腔且在各自内腔的侧壁上具有环形密封槽， 所述帽盖的周边与第一防爆膜的周 边电连接且重叠后紧密压合在所述第一绝缘件的环形密封槽内， 所述帽盖与第一防爆膜 之间在中部形成泄压室， 所述紧固件的环形密封槽内包容并 ^密固定所述第一绝缘件和 位于第一绝缘件下部的第二防爆膜的周边，所述第一防爆膜和第二防爆膜的中部电连接， 所述第二绝缘件的环形密封槽内包容并紧密固定所述紧固件的环形密封槽的外部。
在帽盖的周边与第一防爆膜的周边之间还通过压合的方式串联有正温度系数原件。
所述拉板上设置有透气孔。 所述各防爆膜上设置有刻痕。
一种电池， 包括容器、 容纳于容器内的电池单元、 和用于密封容器并从电池单元引 出电流的电池封口组件， 其中电池封口组件包括防爆组件和封口板， 在封口板上设置有 向下延伸的筒体， 筒体内形成容纳所述防爆组件的空腔， 所述筒体的下部通过向内弯折 形成弯折部从而将防爆组件绝缘、 密封地紧固于筒体内， 弯折部的中心具有第一通孔， 通过所述第一通孔向防爆组件引入电极， 所述筒体内顶部的封口板上具有第二通孔， 通 过所述第二通孔从防爆组件引出电极， 封口板的外侧面相对于筒体具有继续向外凸出的 连接部， 通过所述向外凸出的连接部与所述容器密封固定连接。
所述防爆组件包括与所述空腔的内壁相吻合的绝缘件、 带孔的帽盖、 第一防爆膜和 拉板， 绝缘件向第一通孔的方向进一步延伸形成具有第三通孔的绝缘件外侧支撑台面， 所述帽盖的周边与第一防爆膜的周边电连接且通过绝缘件紧密固定在所述筒体内的封口 板与弯折部之间形成的环形密封槽内，所述帽盖与第一防爆膜之间在中部形成一泄压室， 所述第一防爆膜的中部经第三通孔与抵顶在绝缘件外侧支撑台上的拉板电连接。
所述绝缘件外侧支撑台面上垂直延伸出有沿着封口板上的第二通孔侧壁的凸起， 通 过所述凸起隔离拉板和封口板。
所述防爆组件包括与所述空腔的内壁相吻合的第一绝缘件、 带孔的帽盖、 第一防爆 膜、.环形绝缘件和拉板， 第一绝缘件具有中空的内腔及在第一绝缘件内腔的侧壁上具有 环形密封槽， 绝缘件向第一通孔的方向进一步延伸形成具有第三通孔的绝缘件外侧支撑 台面， 带孔帽盖的周边、 第一防爆膜的周边、 环形绝缘件和拉板的周边依顺序重叠后紧 密压合在所述环形密封槽内， 帽盖的周边与第一防爆膜的周边电连接， 帽盖与防爆膜之 间在中部形成泄压室， 所述第一防爆膜的中部穿过环形绝缘件与拉板电连接。
所述防爆组件包括与所述空腔的内壁相吻合的第一绝缘件、 带孔的帽盖、 第一防爆 膜、 第二防爆膜、 紧固件和第二绝缘件， 所述第一绝缘件、 第二绝缘件和紧固件都具有 中空的内腔且在各自内腔的侧壁上具有环形密封槽， 所述帽盖的周边与第一防爆膜的周 边电连接且重叠后紧密压合在所述第一绝缘件的环形密封槽内， 所述帽盖与第一防爆膜 之间在中部形成泄压室， 所述紧固件的环形密封槽内包容并紧密固定所述第一绝缘件和 位于第一绝缘件下部的第二防爆膜的周边，所述第一防爆膜和第二防爆膜的中部电连接， 所述第二绝缘件的环形密封槽内包容并紧密固定所述紧固件的环形密封槽的外部。
在帽盖的周边与第一防爆膜的周边之间还通过压合的方式串联有正温度系数原件。 所述拉板上设置有透气孔。
所述各防爆膜上设置有刻痕。
采用上述技术方案， 本发明有益的技术效果在于： 1、 通过设置封口座， 将防爆组件密封于封口座的空腔中， 封口座的材质可根据需要 灵活掌握，可根据不同材质的电池容器，选择适合材质的封口座与电池容器通过焊接的方 式进行封口或通过机械翻边方式封口。因此，本发明既适用于安装在机械强度高的电池容 器（如钢壳）上、 也适用于安装机械强度较低的电池容器（如铝、 铝合金等）上。本发明 适用于各种电池容器的电池，不受电池机械容器强度、及电池形状的限制，如圆柱形铝壳 电池、 方形铝壳电池、 圆柱形钢壳电电池、 方形钢壳电电池等。
2、 通过设置封口座， 将防爆组件被绝缘、 密封地紧固于封口座内， 防爆组件与封口 座为各自独立的完整结构，一是便于各自独立加工制造， 而且， 由于封口座结构简单， 技 术上已相当成熟， 价格低廉， 加工成本低， 而且便于方便、迅速地装配防爆组件， 大大提 高了防爆组件的装配安装效率。二是由于封口座和防爆组件各自独立的完整，因此都能更 广泛地适用于各种形状的电池容器。
3、 通过在绝缘件上设置具有第三通孔的绝缘件外侧支撑台面， 将拉板抵顶在绝缘件 外侧支撑台面上，拉板不直接支撑在封口座上，从而使防爆组件简单方便地实现了相对于 封口座的独立完整结构。
4、 封口座采用封口板及在封口板上垂直向上延伸出的筒体结构， 并通过封口板外侧 面凸出的连接部连接密封容器。一是封口座的结构更简单，更有利于方便、迅速地装配防 爆组件； 二是封口板结构不影响密封后的电池外观。
.5、'封口座采用封口板及在封口板上垂直向下延伸出的筒体结构， 一是使得封口板在 与电池容器进行密封焊接时， 由于筒体伸入容器内，有利于封口板与容器之间的定位和方 便焊接。二是将封口板外露， 而不是将弯折部外露， 电池外观更平整， 提供了另一种新颖 的外观。
6、 通过在封口座的筒体的外侧面中部设置凸起的环形连接部结构， 当封口座与电池 容器进行密封焊接时， 由于既有部分筒体伸入容器内， 有利于封口板与容器之间的定位;. 由于有部分筒体外露在容器外， 焊接操作更容易， 又方便了封口板与容器之间的焊接。
7、 根据需要， 封口座可方便地设计成任意形状， 以圆形最佳， 圆形方便加工制造， 装配较方便。
8、 通过设置环形绝缘件， 保证了第一防爆膜只通过其中部与拉板电性连接。
9、通过设置第一防爆膜、第二防爆膜和紧固件， 可实现安全、可靠的二级防爆保护。
10、 封口座的壁厚可方便调整， 以保证空腔内的良好密封。
11、 防爆膜上设置刻痕， 能更精确的设定防爆膜的破裂压力值。 附图说明 图 1是一种改进的电池封口组件的结构图。
图 2是图 1中封口板的结构图。
图 3是图 1中防爆组件的结构图。
图 4是釆用图 1电池封口组件的电池结构图。
图 5是另一种改进的电池封口组件的结构图。
图 6是图 5中封口板的结构图。
图 7是釆用图 5电池封口组件的电池结构图。
图 8是又一种改进的电池封口组件的结构图。
图 9是图 8中筒体的结构图。
图 10是釆用图 8电池封口组件的电池结构图。
图 11是一种防爆组件的结构图。
图 12是另一种防爆组件的结构图。 具体实施方式 实施例 1、 一种改进的电池封口组件及电池， 如图 1-4所示， 电池封口组件包括封口 座和防爆组件， 封口座包括封口板 1、在封口板 1上向上延伸出的筒体 11，封口板 1的外 侧面相对于筒体 11具有继续向外凸出的连接部 10，筒体 11内形成空腔 16,空腔 16内容 纳防爆组件， 筒体 11内的封口板形成支撑台面 14， 封口板 1上有用于引入电极的第一通 孔 15， 筒体 11的末端向筒体 1中心弯折形成具有第二通孔 13的弯折部 12， 通过第二通 孔 13从防爆组件引出电极。 弯折部 12与支撑台面 14之间构成环形密封槽 17。 防爆组件 如图 3所示， 防爆组件包括与所述筒体 11的内壁相吻合的绝缘件 6、 带孔 41的帽盖 4、 正温度系数原件 5、 第一防爆膜 3和拉板 2， 正温度系数原件 5的作用是实现当电池温度 达到预定温度时减小或切断放电电流的作用， 绝缘件 6向第一通孔 15的方向进一步延伸 形成具有第三通孔 62的绝缘件外侧支撑台面 61， 包容在绝缘件 6内的帽盖 4的周边、 正 温度系数原件 5与第一防爆膜 3的周边电连接，为了进一步精确设置防爆膜 3的破裂性能， 防爆膜 3可采用铝质或铜质等导电材质制作， 防爆膜 3上设置有刻痕 31， 通过改变刻痕 31的深度可精确控制第一防爆膜 3的破裂性能， 帽盖 4与第一防爆膜 3之间在中部形成 一泄压室 42， 第一防爆膜 3的中部经第三通孔 62与抵顶在绝缘件 6的外侧支撑台面 61 上的拉板 2焊接连接， 绝缘件 6上设置有凸出部 63， 以便能更紧密地压合固定第一防爆 膜 3， 在拉板 2上设置有透气孔 21， 根据需要， 可以不在拉板 2上设置透气孔 21， 如将 拉板 2与绝缘件 6的接触位置设置成凹凸不平的结构使气压可通过之间的空隙保持平衡。 绝缘件 6紧密固定在弯折部 12和支撑台面 14之间形成的环形密封槽 17内。 采用上述电池封口组件制作的电池， 如图 4所示， 包括钢壳容器 7、容纳于钢壳容器 7内的电池单元 8、用于密封容器 7并从电池单元 8引出电流的电池封口组件、 下盖板 9、 通过绝缘件 91装设在下盖板 9上的极柱 91， 电池封口组件的结构如图 1-3所示， 钢壳容 器 7与封口板 1的外侧面凸出的连接部 10焊接，电池单元 8的一电极 81与拉板 2电连接， 电池单元 8的另一电极 81与极柱 91电连接。 实施例 2、 另一种改进的电池封口组件及电池， 如图 5-7所示， 电池封口组件的结构 包括封口座和防爆组件， 如图 5、 图 6所示， 封口座包括封口板 1、 在封口板 1上向下延 伸出的筒体 11， 封口板 1的外侧面相对于筒体 11具有继续向外凸出的连接部 10， 筒体 11内形成空腔 16， 空腔 16内容纳防爆组件， 筒体 11的下部通过向内弯折形成弯折部 12 从而将防爆组件绝缘、 密封地紧固于筒体 11内， 弯折部 12的中心具有第一通孔 15， 通 过所述第一通孔 15向防爆组件引入电极， 筒体 11内顶部的封口板 1上具有第二通孔 13 , 通过第二通孔 13从防爆组件引出电极。 具有第二通孔 13的封口板 1与弯折部 12之间构 成环形密封槽 17。 防爆组件的结构同实施例 1。
图 7所示是采用上述电池封口组件制作的电池， 包括铝壳容器 7、 容纳于铝壳容器 7 内的电池单元 8、 用于密封容器 7并从电池单元 8引出电流的电池封口组件、 下盖板 9、 通过绝缘件 91装设在下盖板 9上的极柱 91， 电池封口组件的结构如图 5、 图 6所示， 铝 壳容器 7与封口板 1的外侧面凸出的连接部 10焊接， 电池单元 8的一电极 81与拉板 2 电连接， 电池单元 8的另一电极 81与极柱 91电连接。
从外形结构上来看，虽然本实施例电池封口组件基本呈实施例 1电池封口组件的"倒 置"结构。但这种"倒置"结构具有如下有益的效果： 1、在与电池容器进行密封焊接时， 由 于筒体 11伸入容器 7内， 有利于封口板 1与容器 7之间的定位和方便捍接。 2、封口板 1 外露， 而不是弯折部 12外露， 电池外观更平整， 而且提供了另一种新颖的外观。 实施例 3、 又一种改进的电池封口组件及电池， 如图 8、 9所示， 电池封口组件的结 构包括封口座 1和防爆组件， 封口座 1包括具空腔 16的筒体 11， 筒体 11的上部通过向 内弯折形成弯折部 12, 筒体 11的下部垂直于筒体 11向内延伸形成支撑台面 14， 弯折部 12与支撑台面 14之间构成环形密封槽 17。 通过环形密封槽 17将防爆组件绝缘、 密封地 紧固于筒体 11内， 筒体 11底部的中心具有第一通孔 15， 通过第一通孔 15向防爆组件引 入电极， 筒体 11的顶部具有第二通孔 13， 通过第二通孔 13从防爆组件引出电极， 筒体 11外表面的中部具有凸起的环形连接部 10。 防爆组件的结构同实施例 1。 图 10所示是采用上述电池封口组件制作的电池，'包括铝壳容器 7、 容纳于铝壳容器 7内的电池单元 8、用于密封容器 7并从电池单元 8引出电流的电池封口组件、下盖板 9、 通过绝缘件 91装设在下盖板 9上的极柱 91， 电池封口组件的结构如图 8、 9所示， 铝壳 容器 7与封口板 1的外侧面中部凸起的环形连接部 10焊接， 电池单元 8的一电极 81与 拉板 2电连接， 电池单元 8的另一电极 81与极柱 91电连接。
通过在筒体 11的外侧面中部设置凸起的环形连接部 10的好处是在与电池容器进行 密封焊接的过程中， 由于既有部分筒体 11伸入容器 7内， 这有利于封口板 1与容器 7之 间的定位，又有部分筒体 11外露在容器 7外，这又方便了封口板 1与容器 7之间的焊接。 实施例 4、一种防爆组件，如图 Ι ί所示，包括第一绝缘件 234、带孔 210的帽盖 233、 正温度系数原件 238、 第一防爆膜 225、 环形绝缘件 240和拉板 224， 第一绝缘件 234具 有中空的内腔及在第一绝缘件 234内腔的侧壁上具有环形密封槽， 带孔 210的帽盖 233 的周边、 第一防爆膜 225的周边、 环形绝缘件 240和拉板 224的周边依顺序重叠后紧密 压合在所述第一绝缘件的环形密封槽内， 帽盖 233的周边与第一防爆膜 225的周边电连 接， 帽盖 233与防爆膜 225之间在中部形成泄压室 226，拉板 224上开设有透气孔 2241， 拉板 224抵顶在绝缘件 240上且与第一防爆膜 225的中心焊接连接。 防爆膜 225上有刻 痕 227， 通过改变刻痕 227的深度可精确控制第一防爆膜 225的破裂性能。
本实施例提供一种结构简单、 容易制作的防爆组件， 可方便地装配于前述各个实施 例所述的封口座中。
实施例 5、 另一种防爆组件， 如图 12所示， 包括第一绝缘件 423、 带孔 4271的帽 盖 437、 正温度系数原件 424、 具有刻痕 421b的第一防爆膜 421、 具有刻痕 422b的第二 防爆膜 422、 紧固件 428、 第二绝缘件 430， 第一绝缘件 423、'第二绝缘件 430和紧固件 428都具有中空的内腔且在各自内腔的侧壁上具有环形密封槽， 其中帽盖 437的周边、 正温度系数原件 424的周边、 第一防爆膜 421的周边依次层叠设置电连接且重叠后紧密 压合包容在筒形结构的第一绝缘件 423的环形密封槽内， 帽盖 437与第一防爆膜 421之 间在中部形成泄压室 440，第一绝缘件 423和位于第一绝缘件 423下部的第二防爆膜 422 的周边紧固包容于具有透气孔 4281的紧固件 428中，第一防爆膜 421通过其连接部 421a 与第二防爆膜 422通过其连接部 422a固定连接，紧固件 428是通过机械翻边的加工方式 将第一筒形绝缘件 423紧固其中的， 紧固件 428的外圆周被第二筒形绝缘件 430绝缘包 容。
本实施例通过第一、 第二双级防爆膜保护， 进一步提高了防爆组件的可靠性和安全 性。

Claims

权利 要 求
1、 一种改进的电池封口组件， 包括防爆组件， 其特征是： 还包括封口板， 在封口板上' 设置有向下延伸的筒体， 封口板的外侧面相对于筒体具有继续向外凸出的连接部， 筒体内 形成容纳所述防爆组件的空腔， 所述筒体的下部通过向内弯折形成弯折部从而将防爆组件 绝缘、 密封地固定于筒体内， 弯折部的中心具有第一通孔， 能通过所述第一通孔向防爆组 件引入电极， 所述筒体内顶部的封口板上具有第二通孔， 能通过所述第二通孔从防爆组件 引出电极。
2、 根据权利要求 1所述的改进的电池封口组件， 其特征是： 所述防爆组件包括与所述 空腔的内壁相吻合的绝缘件、 带孔的帽盖、 第一防爆膜和拉板， 绝缘件向第一通孔的方向 进一步延伸形成具有第三通孔的绝缘件外侧支撑台面， 所述帽盖的周边与第一防爆膜的周 边电连接且通过绝缘件紧密固定在所述筒体内的封口板与弯折部之间形成的环形密封槽 内， 所述帽盖与第一防爆膜之间在中部形成一泄压室， 所述第一防爆膜的中部经第三通孔 与抵顶在绝缘件外侧支撑台上的拉板电连接。
3、 根据权利要求 2所述的改进的电池封口组件， 其特征是： 所述绝缘件外侧支撑台面 上靠近封口板的第二通孔的侧壁处垂直延伸出有凸起， 通过所述凸起隔离拉板和封口板。
4、 根据权利要求 1所述的改进的电池封口组件， 其特征是： 所述防爆组件包括与所述 空腔的内壁相吻合的第一绝缘件、 带孔的帽盖、 第一防爆膜、 环形绝缘件和拉板， 第一绝 缘件具有中空的内腔及在第一绝缘件内腔的侧壁上具有环形密封槽， 带孔帽盖的周边、 第 一防爆膜的周边、 环形绝缘件和拉板的周边依顺序重叠后紧密压合在所述环形密封槽内， 帽盖的周边与第一防爆膜的周边电连接， 帽盖与防爆膜之间在中部形成泄压室， 所述第一 防爆膜的中部穿过环形绝缘件与拉板电连接。
5、 根据权利要求 1所述的改进的电池封口组件， 其特征是： 所述防爆组件包括与所述 空腔的内壁相吻合的第一绝缘件、 带孔的帽盖、 第一防爆膜、 第二防爆膜、 紧固件和第二 绝缘件， 所述第一绝缘件、 第二绝缘件和紧固件都具有中空的内腔且在各自内腔的侧壁上 具有环形密封槽， 所述帽盖的周边与第一防爆膜的周边电连接且重叠后紧密压合在所述第 一绝缘件的环形密封槽内， 所述帽盖与第一防爆膜之间在中部形成泄压室， 所述紧固件的 环形密封槽内包容并紧密固定所述第一绝缘件和位于第一绝缘件下部的第二防爆膜的周 边， 所述第一防爆膜和第二防爆膜的中部电连接， 所述第二绝缘件的环形密封槽内包容并 固定所述紧固件的环形密封槽的外部。
6、 根据权利要求 2-5任意一项所述的改进的电池封口组件， 其特征是： 在帽盖的周边 与第一防爆膜的周边之间还通过压合的方式串联有正温度系数原件。
7、 根据权利要求 2-5任意一项所述的改进的电池封口组件， 其特征是： 所述拉板上设 置有透气孔。
8、根据权利要求 6所述的改进的电池封口组件，其特征是：所述拉板上设置有透气孔。
9、 根据权利要求 2-5任意一项所述的改进的电池封口组件， 其特征是： 所述各防爆膜 上设置有刻痕。
10、 根据权利要求 8所述的改进的电池封口组件， 其特征是： 所述各防爆膜上设置有 刻痕。
11、 一种电池， 包括容器、 容纳于容器内的电池单元、 和用于密封容器并从电池单元 引出电流的电池封口组件， 其中电池封口组件包括防爆组件， 其特征是： 电池封口组件还 包括封口板， 在封口板上设置有垂直向下延伸的筒体， 筒体内形成容纳所述防爆组件的空 腔， 所述筒体的下部通过向内弯折形成弯折部从而将防爆组件绝缘、密封地紧固于筒体内， 弯折部的中心具有第一通孔， 通过所述第一通孔向防爆组件引入电极， 所述筒体内顶部的 封口板上具有第二通孔， 通过所述第二通孔从防爆组件引出电极， 封口板的外侧面相对于 筒体具有继续向外凸出的连接部， 通过所述向外凸出的连接部与所述容器密封固定连接。
12、 根据权利要求 11所述的电池， 其特征是： 所述防爆组件包括与所述空腔的内壁相 吻合的绝缘件、 带孔的帽盖、 第一防爆膜和拉板， 绝缘件向第一通孔的方向进一步延伸形 成具有第三通孔的绝缘件外侧支撑台面， 所述帽盖的周边与第一防爆膜的周边电连接且通 过绝缘件紧密固定在所述筒体内的封口板与弯折部之间形成的环形密封槽内， 所述帽盖与 第一防爆膜之间在中部形成一泄压室， 所述第一防爆膜的中部经第三通孔与抵顶在绝缘件 外侧支撑台上的拉板电连接。
13、 根据权利要求 12所述的电池， 其特征是： 所述绝缘件外侧支撑台面上垂直延伸出 有沿着封口板上的第二通孔侧壁的凸起， 通过所述凸起隔离拉板和封口板。
14、 根据权利要求 11所述的电池， 其特征是： 所述防爆组件包括与所述空腔的内壁相 吻合的第一绝缘件、 带孔的帽盖、 第一防爆膜、 环形绝缘件和拉板， 第一绝缘件具有中空 的内腔及在第一绝缘件内腔的侧壁上具有环形密封槽， 绝缘件向第一通孔的方向进一步延 伸形成具有第三通孔的绝缘件外侧支撑台面， 带孔帽盖的周边、 第一防爆膜的周边、 环形 绝缘件和拉板的周边依顺序重叠后紧密压合在所述环形密封槽内， 帽盖的周边与第一防爆 膜的周边电连接， 帽盖与防爆膜之间在中部形成泄压室， 所述第一防爆膜的中部穿过环形 绝缘件与拉板电连接。
15、 根据权利要求 11所述的电池， 其特征是： 所述防爆组件包括与所述空腔的内壁相 吻合的第一绝缘件、 带孔的帽盖、 第一防爆膜、 第二防爆膜、 紧固件和第二绝缘件， 所述 第一绝缘件、 第二绝缘件和紧固件都具有中空的内腔且在各自内腔的侧壁上具有环形密封 槽， 所述帽盖的周边与第一防爆膜的周边电连接且重叠后紧密压合在所述第一绝缘件的环 形密封槽内，. 所述帽盖与第一防爆膜之间在中部形成泄压室， 所述紧固件的环形密封槽内 包容并紧密固定所述第一绝缘件和位于第一绝缘件下部的第二防爆膜的周边， 所述第一防 爆膜和第二防爆膜的中部电连接， 所述第二绝缘件的环形密封槽内包容并紧密固定所述紧 固件 β勺环形密封槽的外部。
16、根据权利要求 12-15任意一项所述的电池， 其特征是： 在帽盖的周边与第一防爆膜 的周边之间还通过压合的方式串联有正温度系数原件。
17、 根据权利要求 12-15任意一项所述的电池， 其特征是： 所述拉板上设置有透气 孔。
18、 根据权利要求 16所述的改进的电池， 其特征是： 所述拉板上设置有透气孔。
19、根据权利要求 12-15任意一项所述的改进的¾池， 其特征是： 所述各防爆膜上设置 有刻痕。
20、 根据权利要求 18所述的改进的电池， 其特征是： 所述各防爆膜上设置有刻痕。
PCT/CN2007/001513 2007-03-02 2007-05-08 An improved battery mouth-sealing assembly and a battery including the same WO2008106835A1 (en)

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CN113328213B (zh) * 2021-04-27 2023-07-11 宁波超霸能源有限公司 圆柱型锂电池的制作方法
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KR20100014663A (ko) 2010-02-10
JP2010520579A (ja) 2010-06-10
HK1121588A1 (en) 2009-04-24
EP2133936A4 (en) 2012-10-10
EP2133936A1 (en) 2009-12-16
CN101257097B (zh) 2012-03-14
CN101257097A (zh) 2008-09-03

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