WO2013005922A1 - Batterie secondaire - Google Patents

Batterie secondaire Download PDF

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Publication number
WO2013005922A1
WO2013005922A1 PCT/KR2012/003842 KR2012003842W WO2013005922A1 WO 2013005922 A1 WO2013005922 A1 WO 2013005922A1 KR 2012003842 W KR2012003842 W KR 2012003842W WO 2013005922 A1 WO2013005922 A1 WO 2013005922A1
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WO
WIPO (PCT)
Prior art keywords
cap
sealing
secondary battery
flange
battery
Prior art date
Application number
PCT/KR2012/003842
Other languages
English (en)
Korean (ko)
Inventor
김영덕
정영호
최승호
Original Assignee
주식회사 루트제이드
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
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Application filed by 주식회사 루트제이드 filed Critical 주식회사 루트제이드
Publication of WO2013005922A1 publication Critical patent/WO2013005922A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/155—Lids or covers characterised by the material
    • H01M50/157—Inorganic material
    • H01M50/159—Metals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/116—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
    • H01M50/169—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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to a secondary battery, and more particularly, to a secondary battery in which a can and a cap are joined using two kinds of joints having different bonding strengths in a structure or a method of sealing a can and a cap forming a case of the secondary battery. It relates to a battery.
  • batteries that can be repeatedly charged / discharged that is, secondary batteries are classified into nickel cadmium batteries, nickel hydrogen batteries, nickel zinc batteries, lithium secondary batteries, and the like.
  • lithium secondary batteries are generally used in consideration of their lifetime and capacity. It is becoming.
  • the lithium secondary battery is classified into a lithium metal battery using a liquid electrolyte, a lithium ion battery, and a lithium polymer battery using a polymer solid electrolyte according to the type of electrolyte.
  • Lithium polymer batteries are classified into fully solid lithium polymer batteries containing no organic electrolyte at all and lithium ion polymer batteries using a gel polymer electrolyte containing organic electrolyte according to the type of polymer solid electrolyte.
  • Lithium ion secondary batteries have improved energy density and repeated service life characteristics compared to conventional secondary battery products, and these advantages have steadily increased demand and usage range.
  • the lithium ion secondary battery maintains a more stable performance against the change and risk factors of the external environment due to the high energy density, and in the abnormal situation, the contents of the electrode leak out of the case (pack) to violate the safety. To prevent this from happening, it is necessary to introduce fundamental safety measures in the product design.
  • the existing metal exterior material is generally composed of a can (container) for accommodating the contents of the battery and a cap (cover) covering the material, and the material is iron, stainless steel, aluminum and other metals, or These alloys are used.
  • the welding method ensures stable sealing of the battery because the base material (can and cap) is directly melted and mixed at the joint and then solidified to form a permanent bond at the joint.
  • Welding of such a metal sheath has been used, for example, laser welding, arc welding, plasma welding, electrical resistance welding, and the like, and related prior art may refer to various patents filed by the applicant (Patent Application No. 2000-0021513; Patent Application No. 2000-0014318; Patent Application No. 2000-0044179; Patent Application No. 2003-0065237)
  • the metal sheath which is permanently bonded and / or sealed by welding, not only provides the reliability of long-term use of the battery, but also protects the contents of the battery from external environmental factors such as pressure and mechanical shock, temperature and humidity changes, and at the same time It effectively prevents harmful chemicals from leaking out.
  • the conventional sealing method of welding a can and a cap of a battery by a method such as welding by applying a metal exterior material has the following problems.
  • the present applicant has proposed a technique for bonding or sealing the can and the cap by using a fusion bonding member having a melting point lower than that of the can and the cap (see Patent Application No. 2009-0064395).
  • the can and the cap may be simultaneously sealed and the pressure release mechanism such as the vent may be provided, but the secondary battery may be formed at random or randomly because the pressure is released.
  • the pressure release mechanism such as the vent may be provided, but the secondary battery may be formed at random or randomly because the pressure is released.
  • the molten bonding member melts or tears, and a portion sealed by the molten bonding member opens, and when the gas formed inside the packaging material is discharged to the exterior of the packaging material through such a gap, Since a portion of the gas is randomly formed, there is a problem in that the peripheral electronic device or the component in which the secondary battery is used is degraded by the gas discharged or the performance is deteriorated by a chemical reaction.
  • the electrolyte when the battery is normally used, the electrolyte is caused to undergo electrical or chemical side reactions as the use time elapses, and gas is generated inside the exterior of the battery due to the side reaction.
  • gas When gas is generated, the packaging material expands and the degree of vacuum inside the packaging material decreases.
  • the inside of the battery is expanded in this way, the adhesion between the electrode plates is lowered, the electrolyte is depleted, and the performance of the battery is deteriorated.
  • the battery had to be discarded when the electrolyte was depleted and the battery performance decreased.
  • the present invention has been conceived to improve the problems of the prior art as described above, using a fusion bonding member that is melted at a temperature lower than the melting point of the packaging material (eg, 600 ° C. or less) to bond a portion of the packaging material to the remainder.
  • the part melt dissolves an exterior material and directly bonds together exterior materials, and provides the secondary battery which can easily form a vent part as well as sealing of an exterior material.
  • the present invention provides a secondary battery in which the vent action site can be selected according to design matters by selecting a site where a fusion bonding member is applied or provided.
  • the present invention provides a secondary battery capable of discharging the gas generated inside the packaging material due to an increase in temperature or pressure inside the packaging material to the outside of the packaging material through a portion in which the fusion bonding member is formed, and selecting a portion from which the gas is discharged.
  • the present invention provides a secondary battery capable of adjusting the sealing strength by adjusting the composition or the amount of coating of the melt bonding member.
  • the present invention provides a secondary battery in which a vent mechanism capable of releasing the battery at a specific temperature or pressure by appropriate composition or material selection of the melt bonding member is integrated with the sealing and / or junction of the battery. This object is focused on the ease of controlling the coating amount and the bonding area of the melt bonding member, it is possible to implement a secondary battery having a vent-integrated sealing design that can control the pressure durability.
  • the present invention provides a secondary battery that can prevent the battery from exploding while ensuring the sealing property of the battery by adjusting the area provided with the molten bonding member according to the design conditions, such as the capacity of the battery.
  • the present invention provides a secondary battery that can replenish and reuse the electrolyte when the electrolyte is depleted by using the battery. At this time, the electrolyte may be injected into the packaging material through the fusion bonding member.
  • a secondary battery including a metallic can including an accommodating part and an open part accommodating an electrode assembly and an electrolyte solution; A metallic cap positioned in the opening of the can to seal the can; A first sealing portion formed between a flange of the can and a flange of the cap to bond the can and the cap to each other; And a second sealing portion formed between the flange of the can and the flange of the cap to bond the can and the cap to each other, wherein bonding strengths of the first sealing portion and the second sealing portion are different from each other.
  • the sealing or bonding strength between the can and the cap may be adjusted by the area or melting point of the second sealing portion.
  • the second sealing part may be formed in at least one of portions except for one side adjacent to the electrode tab of the electrode assembly provided in the accommodating part.
  • the second sealing part may be formed in at least one of portions except for one side adjacent to the battery control system BMS provided outside of the accommodating part to protect the electrode assembly.
  • the first sealing part may be formed while the can and the cap are locally heated by locally heating the can and the cap, and the second sealing part may be formed without changing the state of the can and the cap.
  • the first sealing portion may directly bond the can and the cap, and the second sealing portion may indirectly bond the can and the cap by placing a fusion bonding member between the can and the cap.
  • the first sealing portion directly heats the can and the cap to the melting point of the can and the cap, and directly bonds the can and the cap, and the second sealing portion is an alloy of a nonferrous metal or a nonferrous metal having a lower melting point than the can and the cap.
  • the can and the cap may be joined by melting and solidifying the melt bonding member including a.
  • the second sealing part is melted when the temperature of the accommodating part rises to release the sealing state of the can and the cap, or the pressure greater than the joint fracture strength determined by the composition or the coating amount of the melted joint member is increased.
  • the inside of the can can be released from the can seal the cap.
  • the secondary battery according to the present invention for achieving the above object is a metallic can including an accommodating portion and an open portion accommodated together with the electrode assembly; A metallic cap positioned in the opening of the can to seal the can; A sealing portion formed between the flange of the can and the flange of the cap to seal the can and the cap by bonding to each other; And an explosion-proof portion formed between a flange of the can and a flange of the cap to bond the can and the cap to each other and to release a sealing state of the can and the cap. It can be formed by a molten bonding member comprising a non-ferrous metal or an alloy of non-ferrous metal having a melting point lower than the melting point of the cap.
  • the sealing part may be formed by directly joining the melted can and the cap by heating the can and the cap above the melting point of the can and the cap.
  • the explosion-proof part is melted when the temperature of the accommodating part rises to release the sealing state of the can and the cap, or a pressure greater than the bond breaking strength determined by the composition or the coating amount of the molten joint member is applied to the inside of the accommodating part. When it occurs in the can and the can seal the state of the cap can be released.
  • the explosion-proof part may be formed continuously with the sealing part to serve as a joint part for joining the can and the cap.
  • the explosion-proof part may be formed in at least one of portions except for one side adjacent to the electrode tab of the electrode assembly provided in the accommodation part.
  • the explosion-proof part may be formed in at least one of portions except for one side adjacent to the battery control system BMS provided outside of the accommodating part to protect the electrode assembly.
  • the molten bonding member has a melting point of 600 ° C. or less, preferably 400 ° C. or less, and may include any one selected from the group consisting of lead, tin, zinc, aluminum, silver, or an alloy thereof.
  • a secondary battery according to the present invention for achieving the above object is a metallic can including an electrode unit and an accommodating portion and an opening that is accommodated together with the electrolyte; A metallic cap positioned in the opening of the can to seal the can; A sealing portion formed between the flange of the can and the flange of the cap to seal the can and the cap by bonding to each other; And an electrolyte replenishment part formed between the flange of the can and the flange of the cap to bond and seal the can and the cap, and the electrolyte replenishment part formed to enable replenishment of the electrolyte solution, if necessary. And a molten bonding member including a nonferrous metal or an alloy of nonferrous metal having a melting point lower than the melting point of the can and the cap so as to serve as a joint for joining the can and the cap.
  • the electrolyte replenishment part is melted when the temperature of the accommodating part rises to release the sealing state of the can and the cap, or a pressure greater than the joint fracture strength determined by the composition or the coating amount of the molten joint member is increased. When it is generated inside, it is possible to release the sealed state of the can and the cap.
  • the molten bonding member may be melted and resolidified so as to replenish the electrolyte into the accommodating part to reseal the can and the cap.
  • the sealing part may be formed by directly joining the melted can and the cap by heating the can and the cap above the melting point of the can and the cap.
  • the molten bonding member has a melting point of 600 ° C. or less, preferably 400 ° C. or less, and may include any one selected from the group consisting of lead, tin, zinc, aluminum, silver, or an alloy thereof.
  • the electrolyte replenishment unit may be formed at at least one of portions except for one side adjacent to the electrode tab of the electrode assembly provided in the accommodation unit.
  • the electrolyte replenishment part may be formed in at least one of the portions except for one side adjacent to the battery control system BMS provided outside of the accommodating part to protect the electrode assembly.
  • At least one of the can or the cap may be formed with nickel or copper plating on the surface of the flange to improve bonding to the melt bonding member or wettability of the melt bonding member.
  • the flange of the can and the flange of the cap are formed in the same size, and the fusion bonding member may be provided between the flanges.
  • the flange end of the cap is bent toward the can, and the melt joint member may be provided between the flange of the can and the flange of the cap.
  • the secondary battery according to the present invention bonds the exterior materials to each other by using two types of bonding or sealing with different bonding strengths, the secondary battery can be easily formed while ensuring the sealing of the battery.
  • the secondary battery according to the present invention can easily set the temperature or pressure at which the vent operates by adjusting the application amount or composition of the melt bonding member.
  • the secondary battery according to the present invention can adjust the position or direction in which the gas generated by the temperature or the pressure rise is discharged by selecting the site where the molten bonding member is provided.
  • the secondary battery according to the present invention can adjust the position or direction in which the gas is discharged, it is possible to prevent damage to the components around the secondary battery.
  • the secondary battery according to the present invention seals a part of the packaging material by using a fusion bonding member having a lower melting point than the packaging material, it is possible to prevent deterioration of battery internal components to some extent.
  • the secondary battery according to the present invention can be changed to various positions according to design conditions instead of fixing the vent operation position to a specific position by selecting a portion provided with the molten bonding member.
  • the secondary battery according to the present invention can extend the service life of the battery because it can replenish the electrolyte that is depleted as a normal use of the battery. At this time, since the electrolyte can be injected through the portion provided with the fusion bonding member, the sealing of the battery can be maintained even after replenishing the electrolyte and the vent function can be secured in the same manner.
  • FIG. 1 is a perspective view illustrating a rechargeable battery according to an exemplary embodiment of the present invention.
  • FIG. 2 is a perspective view illustrating a modified example of the rechargeable battery of FIG. 1.
  • FIG. 3 is a cross-sectional view taken along the cutting line "III-III" in FIG.
  • FIG. 4 is a cross-sectional view taken along the line “IV-IV” of FIG. 1.
  • FIG. 5 is a cross-sectional view illustrating an interior of a rechargeable battery according to an exemplary embodiment of the present invention.
  • FIG. 6 is a plan view illustrating an interior of a rechargeable battery of FIG. 5.
  • FIG. 7 is a cross-sectional view illustrating an interior of a rechargeable battery according to another exemplary embodiment of the present invention.
  • FIG. 8 is a plan view illustrating an interior of a rechargeable battery according to FIG. 7.
  • FIG. 9 is a cross-sectional view illustrating an example of an operating state of a rechargeable battery according to FIG. 7.
  • FIG. 10 is a cross-sectional view illustrating an interior of a rechargeable battery according to another exemplary embodiment of the present invention.
  • FIG. 11 is a plan view illustrating an interior of a rechargeable battery according to FIG. 10.
  • FIG. 12 is a cross-sectional view illustrating an example of an operating state of a rechargeable battery according to FIG. 10.
  • FIG. 13 to 15 are cross-sectional views showing the shape of a flange provided with a fusion bonding member of the flange shape of the secondary battery according to the present invention.
  • FIG. 1 is a perspective view of a rechargeable battery according to an exemplary embodiment of the present invention
  • FIG. 2 is a perspective view illustrating a modified example of the rechargeable battery according to FIG. 1
  • FIG. 3 is a cut line “III-III” of FIG. 1.
  • 4 is a cross-sectional view taken along the cutting line “IV-IV” of FIG. 1
  • FIG. 5 is a cross-sectional view showing the inside of a secondary battery according to an embodiment of the present invention
  • FIG. 6 is a inside of the secondary battery shown in FIG. 5.
  • 7 is a cross-sectional view illustrating an interior of a secondary battery according to another exemplary embodiment of the present invention
  • FIG. 8 is a plan view illustrating an interior of a secondary battery according to FIG. 7, and FIG.
  • FIG. 9 is a secondary battery according to FIG. 7.
  • 10 is a cross-sectional view showing an example of an operating state of the battery
  • FIG. 10 is a cross-sectional view showing the inside of a secondary battery according to another embodiment of the present invention
  • FIG. 11 is a plan view showing the inside of the secondary battery according to FIG. 12
  • 15 is a cross-sectional view showing the shape of a flange provided with a fusion bonding member of the flange shape of the secondary battery according to the present invention.
  • a rechargeable battery 100 may include an outer material including a metallic can 110 and a metallic cap 120, and an exterior of the can 110 and the cap 120.
  • the packaging materials may be bonded to each other by bonding or sealing formed between the flanges 113 and 123.
  • the can 110 has an accommodating portion 111 for accommodating the components of the battery including the electrode assembly 130 and the electrolyte 140, and has an opening 112 open at one end thereof.
  • the can 110 may itself function as an electrode terminal.
  • the can 110 is illustrated as a hexagonal battery having an open side on one side, but may be deformed to the required dimensions in the industry, such as a cylindrical battery or any other type of battery. Will be easily understood.
  • the electrolyte 140 fills the internal space between the can 110 and the cap 120, so that the inside of the battery can be maintained in a vacuum state.
  • the housing 111 of the can 110 is schematically illustrated in a rectangular shape as a space for accommodating / receiving the electrode assembly 130 and the electrolyte 140, the shape of the electrode assembly 130 is actually assembled. Or it may be changed to a shape corresponding to the shape.
  • the opening 112 of the can 110 is covered by the cap 120 and is not particularly limited in shape and size.
  • the can 110 has a flange 113 protruding by a predetermined length in an outward direction that is substantially orthogonal from a sidewall forming a predetermined thickness or height.
  • This flange 113 is to ensure a stable bonding area with respect to the thickness of the can (110).
  • the total area of the flange 113 may be formed to be 10% or less of the area of the accommodating part 111 of the can 110.
  • the width of the flange 113 may be formed to be 20mm or less, preferably 10mm or less. That is, the flange 113 has a sufficient area to ensure sufficient sealing or joining of the can 110 and the cap 120 and to prevent heat generated when joining by welding or the like to be transmitted to the electrode assembly or the like. It is preferably formed.
  • the cap 120 also includes a flange 123 and may have the same shape or size as the flange 113 of the can 110. However, as shown in FIG. 15, the flange 123 of the cap 120 may have a larger width or protrude outward than the flange 113 of the can 110.
  • the can 110 may include an electrode tab accommodating part 180 in which the electrode tab 132 of the electrode assembly 130 is located.
  • the electrode tab receiving part 180 may be formed to form a step with the receiving part 111 of the can 110, and an electrode terminal electrically connected to the electrode tab 132 on an outer surface of the electrode tab receiving part 180.
  • 190 may be provided.
  • the electrode terminal 190 may include a positive electrode terminal 191 connected to the electrode tab of the positive electrode plate and a negative electrode terminal 192 connected to the electrode tab of the negative electrode plate of the electrode assembly 130.
  • an electrolyte injection hole (not shown) for injecting an electrolyte may be formed in any one of the electrode terminals 190.
  • the electrode tab receiving portion 180 may be provided with a battery control system 134.
  • the Battery Management System (BMS) monitors the condition of the battery and automatically manages the battery system for optimal maintenance and use, predicts when the battery will be replaced, finds the battery in advance, etc. Can perform the function of.
  • the battery control system 134 may perform a function of a battery protection circuit, and when the battery control system 134 is provided, the electrode terminal 190 may be hidden by the battery control system 134 and may not be visible.
  • the battery control system 134 is preferably provided on the same side as the electrode tab 132 of the electrode assembly 130.
  • the can 110 and / or the cap 120 may prevent the contents such as the electrode assembly 130 and the electrolyte 140 contained in the receiving unit from leaking out or introducing outside air. And a material that ensures airtightness to the extent that the contents can operate normally against the pressure difference, physical, chemical, and climatic environmental impact between the inside and the outside.
  • can 110 and / or cap 120 has a thermal conductivity of about 10 kcal / mh ° C. (20 ° C.) or more, a tensile strength of about 5 kgf / mm 2 or more, and a thickness of about 30 ⁇ m or more.
  • the can 110 and / or the cap 120 may be formed of a single metal including iron, aluminum, copper, or an alloy including brass, bronze, and stainless steel.
  • the electrode assembly 130 has a structure in which a cathode plate / separator / cathode plate is sequentially disposed (eg, a lamination type in which a plurality of unit electrodes are stacked or a jelly-roll type in which unit electrodes are wound), and an overall appearance thereof is a hexahedron or coin type. It can be variously modified as follows.
  • the positive electrode plate has a structure in which a positive electrode active material containing lithium-based oxide as a main component is applied to at least one side of the positive electrode current collector of an aluminum thin plate, and the negative electrode plate has at least one side of the negative electrode current collector of a copper thin plate. It is a structure to which the negative electrode active material which has a carbon material as a main component was apply
  • the positive electrode plate and the negative electrode plate each have a positive electrode tab and a negative electrode tab.
  • the positive electrode tab and the negative electrode tab may be disposed at different positions according to polarity, and the positive electrode tab and the negative electrode tab portion protruding from the positive electrode plate and the negative electrode plate may be attached with an insulating tape to prevent a short circuit between the electrode plates.
  • the separator uses a porous polymer film for separating the positive electrode plate and the negative electrode plate.
  • the structure of the electrode assembly 130 composed of the positive plate / separator / cathode plate may be modified by any person skilled in the art.
  • the secondary battery 100 according to an embodiment of the present invention should seal or bond the flanges of the can 110 and the cap 120 to each other to maintain the interior of the battery in a vacuum state.
  • the secondary battery 100 according to the present invention is characterized in that the flanges are bonded to each other by using two types of bonding or sealing methods different in type or different in bonding strength when the flanges are bonded to each other.
  • the can and the cap are sealed to each other by using two types of bonding or sealing methods having different bonding strengths, thereby ensuring airtightness of the battery and pressure inside the battery.
  • a vent function may be secured to prevent the battery from exploding due to a temperature increase, and in some cases, the battery may be replenished with electrolyte that is depleted as the battery is used, thereby extending the service life of the battery.
  • a bonding structure of the can 110 and the cap 120 of the battery 100 according to the present invention will be described with reference to the drawings.
  • the secondary battery 100 includes an accommodating part 111 and an opening part 112 in which the electrode assembly 130 and the electrolyte 140 are stored together.
  • Metal can 110 including a metallic cap 120, the can 110 and the cap 120 is located in the opening 112 of the can 110 to seal the can 110
  • the first sealing portion 150 formed between the flange 113 of the can 110 and the flange 123 of the cap 120 and the can 110 and the cap 120 to each other.
  • the second sealing part 160 may be formed between the flange 113 of the can 110 and the flange 123 of the cap 120 to be bonded.
  • the first and second sealing parts 150 and 160 should be formed continuously so that the inside of the can 110 and the cap 120 may be completely blocked from the outside and sealed. That is, as shown in FIG. 6, when the flange 113 of the can 110 is viewed with the cap 120 removed, the region S1 and the second sealing portion 160 in which the first sealing portion 150 is formed are formed. The region S2 in which is formed is to be formed continuously without breaking. If the first sealing part 150 and the second sealing part 160 are not formed continuously, the vacuum state inside the battery may be destroyed or the electrolyte may leak out through the discontinuous portions.
  • the secondary battery 100 according to the exemplary embodiment of the present invention is formed such that the first and second sealing parts 150 and 160 for bonding and sealing the can 110 and the cap 120 have different sealing strengths or bonding strengths. do.
  • the bonding strength of the first sealing portion 150 is greater than the bonding strength of the second sealing portion 160.
  • the first sealing unit 150 may be formed by welding the flanges 113 and 123 of the can 110 and the cap 120 by melting the can 110 and the cap 120 directly.
  • the second sealing portion 160 does not directly join the can 110 and the cap 120, but provides a separate filler material or a welding additive for welding between the can 110 and the cap 120. It may be formed by welding indirectly joining the can 110 and the cap 120 by melting the filler material or the welding additive. That is, the first sealing part 150 may be formed by direct welding, and the second sealing part 160 may be formed by indirect welding.
  • the can 110 and the cap 120 are heated by melting the can 110 and the cap 120 above the melting point of the can 110 and the cap 120.
  • any welding may be included as long as it is a local heating method instead of heating the entire surface.
  • laser welding, electric resistance welding, ultrasonic welding, plasma welding and the like can be used.
  • the first sealing part 150 applies a predetermined pressure in a state change of the can 110 and the cap 120, that is, the state in which the can 110 and the cap 120 are melted, without additional filler material.
  • the can 110 and the cap 120 may be directly bonded.
  • the first sealing part 150 formed by the direct welding method is preferably not sealed by using a battery. That is, unlike the second sealing part 160, the sealing state of the first sealing part 150 is not released even when the temperature inside the can 110 and the cap 120 increases or the pressure increases. It may be formed to a degree of bonding strength that is not.
  • the second sealing part 160 having a smaller bonding strength than the first sealing part 150 firmly seals the can 110 and the cap 120 in the normal operation state of the battery, but the internal temperature of the battery is increased.
  • the battery may be prevented from exploding by providing a vent function to release the sealed state of the can 110 and the cap 120.
  • the second sealing part 160 is preferably formed by an indirect bonding method in order for the second sealing part 120 to be vented under operating conditions in which temperature or pressure increases. That is, the second sealing unit 160 is not directly connected between the can 110 and the cap 120, but between the can 110 and the cap 120 (more precisely, the flange 113 of the can and the flange of the cap). (123 between) and the melt bonding member 162 having a melting point lower than the melting point of the can 110 and the cap 120, the melt bonding member 162 is melted to the can 110 and the cap 120 It can be formed to indirectly bond.
  • the second sealing unit 160 does not use the state change of the can 110 and the cap 120 or melt the can 110 and the cap 120, but is disposed between the can 110 and the cap 120.
  • the can 110 and the cap 120 may be bonded by melting the melt bonding member 162 corresponding to the welding additive.
  • the can 110 and the cap 120 by joining the molten fusion joining member 162 and the flange 113 of the can 110, and joining the molten joining member 162 and the flange 123 of the cap 120. ) Can be sealed.
  • the fusion bonding member 162 forming the second sealing portion 160 is lower than the melting point of the can 110 and the cap 120, and has a melting point without fear of transferring heat to the inside of the battery. 110) and / or excellent bonding or wettability with the cap 120, it is possible to expect sufficient bonding strength, taking into account external factors such as cost, environmental friendliness, and reaching a certain temperature or pressure
  • the lower surface may be selected from various kinds of nonferrous metals or alloys or compounds of nonferrous metals in consideration of the property of melting and release of the battery.
  • the reason for using an alloy of nonferrous metal as the fusion bonding member 162 can lower the melting point than the single metal, improve the mechanical strength, lower the price and can be expected to bond affinity with the can / cap It can have a variety of liquidus-solidus temperature range.
  • composition and melting point of the melt bonding member 162 that can be used in the secondary battery 100 according to the embodiment of the present invention are as shown in Table 1 (Type 1 of the melt bonding member).
  • the fusion bonding member 162 that can be used in the secondary battery 100 according to an embodiment of the present invention includes silver (Ag), tin (Sn), or lead (Pb). It will be apparent to those skilled in the art that a lead or an alloy thereof may not be selected in consideration of environmentally friendly factors.
  • the melt bonding member 162 that may be used in the secondary battery 100 according to the exemplary embodiment of the present invention may have a melting point of about 600 ° C. or less, preferably 400 ° C. or less, more preferably 250 ° C. or less.
  • the fusion bonding member 162 has a low temperature that can be melted, preferably avoiding a high heat source being disposed in the process, and using general purpose equipment (eg, heaters). , Jig and the like).
  • the melt bonding member 162 is not released or weakened in the general operating range of the secondary battery 100 (eg, less than 80 ° C.), and the generalized heat resistance harsh test standard (UL standard for lithium ion batteries: 130 °C), a positive electrode material known to pose a fatal risk to the safety of the battery, unless the internal pressure is rapidly increased (in the range where the insulation of the separator is not broken so that internal short circuit does not occur).
  • the seal can be sufficiently released before reaching the internal thermal runaway onset temperature of (eg, about 200 ° C.). For this reason, in the general vent mechanism of the conventional secondary battery (bent means are provided in some narrow area of the exterior material), even if the vent mechanism is operated, the discharge through a sufficient area compared to the ejection pattern of the internal material is prevented. It is difficult, and moreover, the vent hole is clogged by the ejecting material.
  • the intended wide area can be utilized as a vent mechanism, and the temperature and the endurance pressure can be easily adjusted within such a range.
  • the melt bonding member 162 illustrated in Table 1 has a melting point of about 100 ° C. to about 450 ° C., but is largely different from a general operating temperature range (less than 80 ° C.) of the secondary battery 100. There is also some difference from the thermal runaway onset temperature (200 ° C.) of the positive electrode material. Accordingly, the present invention may use a melt bonding member 162 having a lower melting point and having a different composition in addition to the melt bonding member 162 of the composition shown in Table 1 above.
  • the melt bonding member 162 according to the present invention may be melted at 10 ° C to 120 ° C. If the melt bonding member 162 is melted at 10 ° C. to 120 ° C., the melt bonding member 162 may be formed even before the thermal runaway start temperature of the positive electrode material is reached or even slightly higher than the general operating temperature range of the secondary battery 100. 162 may be melted. However, even in the case of having such a melting point, it is preferable to exclude the melt bonding member 162 having a melting point lower than the general operating temperature range of the secondary battery 100.
  • the molten bonding member 162 having a low melting point is formed of gallium (Ga), indium (In), cadmium (Cd), or bismuth (Bi), as illustrated in Table 2 below (Type 2 of the melting bonding member). It may include at least one.
  • the melt bonding member 162 may be formed by using a reflow method used for surface mounting technology (SMT). Can dissolve.
  • SMT surface mounting technology
  • the sealing or bonding strength between the can 110 and the cap 120 may be adjusted by the area or melting point of the second sealing portion 160. That is, the bonding strength by the second sealing unit 160 may be adjusted by selecting an appropriate melting point according to the coating area or the composition of the fusion bonding member 162 forming the second sealing unit 160.
  • the second sealing unit 160 properly selects the bonding strength to seal the can 110 and the cap 120 in the normal state, but the sealing is performed in the abnormal state in which the temperature or the pressure inside the battery increases.
  • the gas generated inside the battery may be released to the outside of the battery. That is, when the temperature of the accommodating part 111 rises, the second sealing part 160 melts the fusion bonding member 162 to release the sealing state between the can 110 and the cap 120, or Between the can 110 and the cap 120 when a pressure greater than the strength that breaks the bonding or sealing determined by the composition or application amount of the molten bonding member 162 occurs inside the accommodating portion 111. Can be torn or released to release the battery's seal.
  • the solidified melt bonding member 162 and the can 110 are bonded or the solidified melt bonding member 162 and the cap 120 are bonded to each other. While broken, the sealed state of the can 110 and the cap 120 may be released.
  • the second sealing unit 160 is preferably formed by the fusion bonding member 162 having a suitable coating area or composition so as to have a bonding strength that can be released before the battery explodes.
  • the fusion bonding member 162 may select a composition that can be melted by local heating. Do.
  • a method of locally heating the molten bonding member 162 may include contact resistance, high frequency sealing, laser, light beam, pulse heat, or hot-ram. It should be noted that either method can be used and is not necessarily limited to this method.
  • the secondary battery 100 may freely select a position where the first sealing unit 150 and the second sealing unit 160 are formed. That is, the position of the electrode tab 132 of the electrode assembly 130 provided inside the secondary battery 100, the environment in which the battery 100 is used, or a kind of peripheral electronic component used in conjunction with the battery 100 may be used. Accordingly, the formation position or area of the first sealing unit 150 and the second sealing unit 160 may be adjusted. In particular, by adjusting the position where the second sealing unit 160 is formed or the area of the second sealing unit 160, the position or the size at which the sealing of the second sealing unit 160 is released by the temperature or the pressure rise of the battery is adjusted. I can regulate it.
  • the position or direction in which the high temperature or high pressure gas generated inside the battery is discharged may be adjusted. Since the position or direction of the gas discharge can be adjusted, the vacuum of the battery can be prevented, thereby preventing secondary damage to the surrounding structures or components in which the battery is used and reducing the risk of the battery exploding.
  • the second sealing part 160 is formed in at least one portion S2 except for one side S1 adjacent to the electrode tab 132 of the electrode assembly 130 provided in the accommodating part 111.
  • the second sealing part 160 may be formed at a portion S2 other than the portion facing the electrode tab 132. That is, the second sealing part 160 may be formed over the entire three surfaces S2 that are not adjacent to the electrode tab 132, or may be formed on any one portion or multiple portions of the three surfaces S2.
  • the first sealing part 150 in which the sealing is not released may be formed in the portion S1 adjacent to the electrode tab 132.
  • the second sealing part 160 is a part S2 except for one side S1 adjacent to the battery control system BMS 134 provided outside the accommodating part 111 to protect the electrode assembly 130. It may be formed in at least one place. Similarly, the second sealing unit 160 may be formed over the entire three surfaces S2 that are not adjacent to the battery control system 134, or may be formed on any one portion or multiple portions of the three surfaces S2. In this case, the first sealing part 150 in which the sealing is not released may be formed in the portion S1 adjacent to the battery control system 134.
  • the second sealing part 160 is formed to be positioned at a portion S2 that is not adjacent to the electrode tab 132 or the battery control system 134 so that the sealing of the second sealing part 160 is released to obtain a high temperature or
  • the electrode tab 132 may be prevented from being damaged or exploded by the gas, and the battery control system 134 may be prevented from being damaged.
  • the position of the second sealing unit 160 may be adjusted so that the gas is not discharged toward the component. That is, the site where the parts easily damaged or exploded can be sealed by using the first sealing part 150 to prevent the gas from being discharged in such a direction.
  • the secondary battery 100 may have different bonding strengths between the first sealing part 150 and the second sealing part 160, and may be applied to the first and second sealing parts 150 and 160.
  • By adjusting the sealed position, direction or area, etc. it is possible to easily prevent damage or explosion of the battery or components around the battery.
  • the vent function is effectively performed, and the battery is sealed using a single bond having a similar bond strength to the second sealing portion.
  • the secondary battery 100 according to an embodiment of the present invention has an advantage that can solve this disadvantage have.
  • the secondary battery 200 may include a metallic can including an accommodating part 211 and an opening part 112 (see FIG. 5) for accommodating the electrode assembly 230 and the electrolyte 240. 210, a metal cap 220 positioned at the opening 112 of the can 210 to seal the can 210, the can 210 to bond and seal the can 210 and the cap 220 with each other.
  • the sealing portion 250 formed between the flange 213 of the cap 220 and the flange 223 of the cap 220 and the flange 213 of the can 210 and the flange 223 of the cap 220 can
  • An explosion-proof portion 260 may be attached to each other and the cap 220 may be bonded to each other and the sealing state of the can 210 and the cap 220 may be released.
  • the explosion-proof unit 260 bonds the can 210 and the cap 220 to each other under normal operation of the battery, but seals the can 210 and the cap 220 in an abnormal state to release the sealed state of the battery 200. ) Can be prevented from exploding.
  • the explosion-proof part 260 preferably has a smaller bond strength than the sealing part 250.
  • the explosion-proof part 260 has a melting point lower than the melting point of the can 210 and the cap 220, or an alloy of nonferrous metal or nonferrous metal. It may be formed by the melt bonding member 262 including.
  • sealing unit 250 is the same as the first sealing unit 150 of the secondary battery 100 according to the exemplary embodiment, repeated description thereof will be omitted.
  • the explosion-proof part 260 is formed continuously with the sealing part 250 so that the sealing of the can 210 and the cap 220 should not be released under normal operation.
  • the area S3 (parts indicated by hatches) and the area where the explosion-proof parts 260 are formed (S4, areas indicated by dots) must be formed in succession to maintain the vacuum state inside the battery and to the outside of the electrolyte. Leakage can be prevented.
  • the explosion-proof part 260 of the secondary battery 200 may be said to have a greater function of preventing the explosion of the battery 200 by releasing the sealed state of the can 210 and the cap 220.
  • Explosion-proof portion 260 may prevent the explosion of the battery by using a melt bonding member 262 having a melting point lower than the melting point of the can 210 and the cap 220, the secondary according to another embodiment of the present invention
  • the explosion-proof portion 260 of the battery 200 may serve as a joint portion that performs a vent function to prevent the explosion of the battery and is continuously formed with the sealing portion 250 to bond the can 210 and the cap 220.
  • the junction part and the vent part are separately formed, whereas the secondary battery 200 according to another embodiment of the present invention has a difference in that the junction part and the vent part are integrally formed by the explosion-proof part 260. have.
  • the secondary battery 200 includes an explosion-proof part 260 which functions as a junction, a sealing, and a vent, thereby eliminating the inconvenience of having to provide a vent separately.
  • an explosion-proof part 260 which functions as a junction, a sealing, and a vent, thereby eliminating the inconvenience of having to provide a vent separately.
  • the molten bonding member 262 of the explosion-proof part 260 includes any one selected from the group consisting of lead (Pb), tin (Sn), zinc (Zn), aluminum (Al), silver (Ag), or alloys thereof. It may be formed by, and may have a composition as shown in Table 1 above.
  • the melt bonding member 262 that may be used in the secondary battery 200 according to another embodiment of the present invention has a melting point of about 600 ° C. or less, preferably 400 ° C. or less, more preferably 250 ° C. or less. Can be.
  • the melt bonding member 262 of the secondary battery 200 according to another embodiment of the present invention has the same physical or chemical properties as the melt bonding member 162 of the secondary battery 100 according to the above-described embodiment. It is desirable to have.
  • the fusion bonding member 262 forming the explosion-proof portion 260 is melted when the temperature of the accommodating portion 211 rises to release the sealing state of the can 210 and the cap 220 or the fusion bonding member 262.
  • a pressure greater than the bond breaking strength determined by the composition or the amount of coating is generated inside the accommodating portion 211, the sealed state of the can 210 and the cap 220 may be released.
  • the fusion bonding member 262 of the explosion-proof portion 260 is melted, and thus the bonding state between the can 210 and the cap 220 is changed.
  • the hot or high pressure gas generated in the inside of the battery 200 may be discharged to the outside through the gap between the can 210 and the cap 220 in which the sealing is released. As described above, by expelling the gas to the outside, it is possible to prevent the battery 200 from exploding in advance.
  • melt bonding member 262 and the can 210 or the cap 220 may be used. ), The seal may be released as the bond of the) is broken.
  • the melt bonding member 262 of the secondary battery 200 according to another embodiment of the present invention is more than the melt bonding member 162 of the secondary battery 100 according to the embodiment of the present invention described above for the explosion-proof function. Bond strength can be formed to be weak and have a lower melting point.
  • the explosion-proof part 262 may be formed in at least one of the portion (S4) except the one side (S3) adjacent to the electrode tab 232 of the electrode assembly 230 provided in the receiving portion 211.
  • the explosion-proof portion 260 may be formed at a portion S4 other than the portion facing the electrode tab 232. That is, the explosion-proof part 260 may be formed over the entire three surfaces S4 that are not adjacent to the electrode tab 232, or may be formed on any one portion or multiple portions of the three surfaces S4.
  • a sealing portion 250 having a high bonding strength may be formed in the portion S3 adjacent to the electrode tab 232 so that the sealing is not released.
  • the explosion-proof unit 260 is at least one of the portion S4 except for the one side (S3) adjacent to the battery control system 234 (BMS) provided outside the housing 211 to protect the electrode assembly 230. Where it can be formed.
  • the explosion-proof part 260 may be formed over the entirety of three surfaces S4 that are not adjacent to the battery control system 234, or may be formed on any one portion or multiple portions of the three surfaces S4.
  • a sealing portion 250 may be formed in the portion S3 adjacent to the battery control system 234 and has a greater bonding strength than the explosion-proof portion 260 and does not release the sealing.
  • the explosion-proof portion 260 is formed in a portion S4 not adjacent to the electrode tab 232 or the battery control system 234 to release the sealing of the explosion-proof portion 260 so that the gas of high temperature or high pressure is released.
  • the electrode tab 232 can be prevented from being damaged or exploded by the gas
  • the battery control system 234 can be prevented from being damaged
  • the explosion of the battery 200 itself can be prevented.
  • the position of the explosion-proof portion 260 may be adjusted so that the gas is not discharged toward the component. That is, the site where the parts easily damaged or exploded may be sealed by using the sealing unit 250 to prevent the gas from being discharged in such a direction.
  • the secondary battery 200 can easily select the bonding strength or the position of the explosion-proof portion 260, and through such selection, the secondary battery 200 is excessive in the battery due to abnormal operation of the battery. It is possible to prevent pressure or overheating, and to prevent damage to components around the battery due to high temperature or high pressure gas discharged to the outside of the battery.
  • the secondary battery 300 may include a metallic can including an accommodating part 311 and an opening part 112 (see FIG. 5) in which the electrode assembly 320 and the electrolyte 340 are stored together.
  • a metallic can including an accommodating part 311 and an opening part 112 (see FIG. 5) in which the electrode assembly 320 and the electrolyte 340 are stored together.
  • the metallic cap 320 located in the opening 112 of the can 310 to seal the can 310, the can 310 to bond and seal the can 310 and the cap 320 with each other.
  • the flange 313 of the can 310 and the seal 310 formed between the flange 313 of the cap 320 and the flange 323 of the cap 320 and the cap 310 and the cap 320 to be bonded and sealed.
  • the sealing unit 350 is formed in the same manner as the sealing unit 250 of the first sealing unit 150 of the secondary battery 100 or the secondary battery 200 according to another embodiment described above. Can be.
  • the secondary battery 300 can increase the service life of the battery because it is possible to replenish the electrolyte when necessary.
  • the electrolyte 340 filled in the battery may cause side reactions. Due to the side reaction of the electrolyte solution 340, gas is generated inside the battery, and the inside of the battery is expanded due to the gas. When the battery is expanded, the gap between the positive electrode plate and the negative electrode plate constituting the electrode assembly 330 is poor, the adhesion between the electrode plate is worsened, the degree of vacuum inside the battery is reduced. Degradation of the adhesion of the electrode plate or deterioration of the vacuum may adversely affect the performance of the battery, and when the electrolyte 340 reacts sideways, the electrolyte 340 gradually decreases.
  • the secondary battery 300 may replenish the depleted electrolyte solution 340 through the electrolyte replenishment unit 360. Can extend the lifespan.
  • the electrolyte replenisher 360 may be continuously formed with the sealing unit 350 to serve as a junction for joining the can 310 and the cap 320. That is, the electrolyte replenishing part 360 functions as a joint part for joining the can 310 and the cap 320 to each other in a normal state, but when it is necessary to replenish the electrolyte solution, the electrolyte replenishment part 360 is released and the electrolyte solution is filled through the part. Can be injected into the cell.
  • the electrolyte is injected through an electrolyte injection hole (not shown) formed in an electrode terminal or a can or a cap, and the electrolyte injection hole is sealed to make the inside of the battery into a vacuum state.
  • electrolyte injection hole not shown
  • electrolyte solution cannot be replenished through electrolyte injector.
  • Electrolyte replenishment portion 360 of the secondary battery 300 is a melt bonding member including a non-ferrous metal or an alloy of non-ferrous metal having a melting point lower than the melting point of the can 310 and the cap 320 It may be formed by 362.
  • the melt bonding member 362 of the electrolyte replenishing part 360 may have a melting point of 600 ° C. or lower, preferably 400 ° C. or lower, more preferably 250 ° C. or lower, and lead, tin, zinc, aluminum It may be formed by including any one selected from the group consisting of, silver or alloys thereof.
  • the melt bonding member 362 of the electrolyte replenishing part 360 is melted to release the sealing state of the can 310 and the cap 320.
  • the battery can be sealed by replenishing the electrolyte through the released portion and solidifying the melt bonding member 362 again.
  • a pressure greater than the bond breaking strength determined by the composition or the coating amount of the melt bonding member 362 is generated inside the accommodating portion 311, the melt bonding member 362 and the can 310 and / or the cap are formed.
  • the sealing state may be released as the bonding of the 320 is broken, and the battery may be sealed by solidifying the molten bonding member 362 again after replenishing the electrolyte through the portion where the sealing is released.
  • the electrolyte replenishing part 360 normally operates as a joint part for joining the can 310 and the cap 320, and needs to be replenished, or abnormally, the electrolyte replenishing part 360 is released and the electrolyte leaks. If so, it can be used to replenish the electrolyte.
  • the electrolyte may be replenished through the electrolyte replenisher 360 even when the sealing of the electrolyte replenisher 360 is not released due to an abnormal state of the battery.
  • the melt bonding member 362 of the electrolyte replenishing unit 360 is artificially melted and the can 310
  • the battery may be resealed by releasing the seal of the cap 320 and replenishing the electrolyte through the portion thereof, and then resolidifying the melt bonding member 362 in a state in which a vacuum is formed in the battery.
  • the sealing unit 350 and the electrolyte replenishing unit 360 may have different bonding strengths to replenish the electrolyte, and the sealing unit 350 Should have greater intensity.
  • the battery may explode.
  • the battery may be prevented by implementing a vent function through the electrolyte replenishing part 360.
  • the electrolyte replenishing part 360 may be formed in at least one of the portions S6 except for one side S5 adjacent to the electrode tab 334 of the electrode assembly 330 provided in the accommodating part 311. As illustrated in FIG. 11, the electrolyte replenishing part 360 may be formed at a portion S6 other than the portion facing the electrode tab 332. That is, the electrolyte replenishment part 360 may be formed over the entirety of three surfaces S6 that are not adjacent to the electrode tab 332, or may be formed on any one portion or multiple portions of the three surfaces S6. In this case, a sealing portion 350 having a high bonding strength may be formed in the portion S5 adjacent to the electrode tab 332 so that the sealing is not released.
  • the electrolyte refilling unit 360 may include at least one of the portions S6 except for one side S5 adjacent to the battery control system 334 (BMS) provided outside the housing 311 to protect the electrode assembly 330. It can be formed in one place.
  • the electrolyte replenisher 360 may be formed over the entirety of three surfaces S6 that are not adjacent to the battery control system 334, or may be formed on any one or multiple portions of the three surfaces S6.
  • a sealing portion 350 may be formed at a portion S5 adjacent to the battery control system 334 and having a greater bonding strength than that of the electrolyte replenishing portion 360 and the sealing of which is not released.
  • the electrolyte replenishment portion 360 is formed to be positioned at a portion S6 not adjacent to the electrode tab 332 or the battery control system 334 to release the sealing of the electrolyte replenishment portion 360 to obtain a high temperature or high pressure.
  • the electrode tab 332 can be prevented from being damaged or exploded by the gas, the battery control system 334 can be prevented from being damaged, and the explosion of the battery 300 itself can be prevented. have.
  • the position of the electrolyte replenishing part 360 may be adjusted so that the gas is not discharged toward the component. That is, the site where the parts easily damaged or exploded may be sealed by using the sealing unit 350 to prevent the gas from being discharged in such a direction.
  • the secondary battery 300 can easily select the bonding strength or the position of the electrolyte replenishing part 360, and through such selection, the battery inside due to abnormal operation of the battery. It is possible to prevent excessive pressure or overheating, and damage to components around the battery due to high temperature or high pressure gas discharged to the outside of the battery.
  • the sealing of the electrolyte replenishing part 360 is not released to prevent the explosion of the battery 300, and the electrolyte replenishing part 360 is melted to replenish the electrolyte, regardless of the explosion of the battery 300.
  • the electrolyte replenishing part 360 is formed at one side S5 facing or close to the electrode tab 332 or the battery control system 334, the sealing is released to replenish the electrolyte. It may be necessary to open the flange 313 of the can 310. In this case, when the force is applied to the can 310 to increase the space where the sealing is released, the battery control system 334 may be damaged or the electrode tab 332 may be broken.
  • the electrolyte replenishing part 360 is preferably formed at a portion S6 where the electrode tab 332 or the battery control system 334 is not located.
  • the rechargeable battery 300 uses an fusion bonding member 362 having a melting point lower than that of the can 310 and / or the cap 320.
  • the can 310 and the cap 320 may be bonded to each other, and at the same time, the seal may be released as needed, the electrolyte may be replenished through the released portion, and the can 310 and the cap 320 may be sealed again. have.
  • At least one of the cans 110, 210, 310, or caps 120, 220, and 320 of the secondary batteries 100, 200, and 300 according to the present invention may be formed on the surface of the flange to improve adhesion to the melt bonding members 162, 262, 362 or wettability of the melt bonding members 162, 262, 362.
  • Nickel or copper plating may be formed.
  • the flange 113 of the can 110 and the flange 123 of the cap 120 may be improved to improve bonding between the melt bonding member 162 and the can 110 and the cap 120.
  • Receiving grooves 114 and 124 for accommodating the molten bonding member 162 may be formed. By forming the receiving grooves 114 and 124, the contact area between the can 110 and the cap 120 and the melt bonding member 162 can be increased when the coating amount of the melt bonding member 162 is the same. It can increase.
  • the flange 113 of the can 110 and the flange 123 of the cap 120 may be formed in the same size, and the fusion bonding member 162 may be provided between the flanges 113 and 123.
  • the melt bonding member 162 is provided in the same size as the flanges 113 and 123 (Fig. 14 (a)), or provided in a smaller size than the flanges 113 and 123 (Fig. 14 (b)), It may be provided to protrude out of the flanges 113 and 123 (FIG. 14C).
  • the molten fusion bonding member 162 may also seal side surfaces of the flanges 113 and 123, and thus may have greater bonding strength.
  • an end 125 of the flange 123 of the cap 120 is bent toward the can 110, and the fusion bonding member 162 is the flange 113 and the cap 120 of the can 110. May be provided between the flanges 123.
  • one end of the flange 113 of the can 110 is formed to be in contact with the bent end 125 of the cap 120 flange 123 and between the flanges 113 and 123 with the same size as the melt bonding member ( 162 may be provided (FIG. 15A).
  • one end of the flange 113 of the can 110 may be formed so as not to contact the end 125 of the flange 120 of the cap 120.
  • the fusion bonding member 162 may obtain a desired bonding strength by varying the width or thickness. That is, the shape of the flanges 113 and 123 or the application shape of the melt bonding member 162 may be variously changed according to the desired bonding strength or the desired sealing release condition.
  • the present invention can be applied to secondary batteries or energy storage devices.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

La présente invention se rapporte à une batterie secondaire comprenant : un boîtier métallique, qui comporte une partie de stockage qui contient un ensemble d'électrodes ainsi qu'un électrolyte, et une partie ouverte ; un couvercle métallique, qui est placé sur la partie ouverte du boîtier et qui assure la fermeture hermétique du boîtier ; une première partie de scellage hermétique, qui est formée entre un rebord du boîtier et un rebord du couvercle, et qui sert à coupler le boîtier et le couvercle l'un à l'autre ; et une seconde partie de scellage hermétique, qui est formée entre le rebord du boîtier et le rebord du couvercle, et qui sert à coupler le boîtier et le couvercle l'un à l'autre, la première partie de scellage hermétique et la seconde partie de scellage hermétique ayant des forces de couplage différentes.
PCT/KR2012/003842 2011-07-04 2012-05-16 Batterie secondaire WO2013005922A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2011-0065952 2011-07-04
KR1020110065952A KR20130004724A (ko) 2011-07-04 2011-07-04 이차 전지

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112467260A (zh) * 2019-09-09 2021-03-09 苹果公司 金属壳电池
CN113363616A (zh) * 2021-06-17 2021-09-07 中国第一汽车股份有限公司 一种压力可调的液冷板、动力电池总成和车辆
US11165126B2 (en) * 2014-08-08 2021-11-02 Techtronic Cordless Gp Battery pouch, battery cell and method of making a pouch or battery cell
EP3800686A4 (fr) * 2018-12-29 2021-11-24 Contemporary Amperex Technology Co., Limited Batterie secondaire et module batterie
US11186422B2 (en) 2014-02-07 2021-11-30 Yeti Coolers, Llc Insulating device and method for forming insulating device
US11201366B2 (en) 2018-02-27 2021-12-14 Tti (Macao Commercial Offshore) Limited Pouch battery with safety protection function
WO2023138586A1 (fr) * 2022-01-21 2023-07-27 宁德新能源科技有限公司 Boîtier de batterie, batterie et dispositif électronique

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003007266A (ja) * 2001-06-25 2003-01-10 Toyota Motor Corp 電極体の封止構造
KR20030053092A (ko) * 2001-12-22 2003-06-28 한국 파워셀 주식회사 리튬이온 이차전지의 음극단자 형성방법
KR20060087185A (ko) * 2005-01-28 2006-08-02 삼성에스디아이 주식회사 파우치형 리튬 이차 전지 및 그의 제조 방법
KR20080064916A (ko) * 2007-01-06 2008-07-10 주식회사 엘지화학 발화 및 폭발에 대한 안전성이 개선된 리튬 이차전지
KR20110006826A (ko) * 2009-07-15 2011-01-21 주식회사 루트제이드 이차 전지 및 에너지 저장 장치

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003007266A (ja) * 2001-06-25 2003-01-10 Toyota Motor Corp 電極体の封止構造
KR20030053092A (ko) * 2001-12-22 2003-06-28 한국 파워셀 주식회사 리튬이온 이차전지의 음극단자 형성방법
KR20060087185A (ko) * 2005-01-28 2006-08-02 삼성에스디아이 주식회사 파우치형 리튬 이차 전지 및 그의 제조 방법
KR20080064916A (ko) * 2007-01-06 2008-07-10 주식회사 엘지화학 발화 및 폭발에 대한 안전성이 개선된 리튬 이차전지
KR20110006826A (ko) * 2009-07-15 2011-01-21 주식회사 루트제이드 이차 전지 및 에너지 저장 장치

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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US11165126B2 (en) * 2014-08-08 2021-11-02 Techtronic Cordless Gp Battery pouch, battery cell and method of making a pouch or battery cell
US11201366B2 (en) 2018-02-27 2021-12-14 Tti (Macao Commercial Offshore) Limited Pouch battery with safety protection function
EP3800686A4 (fr) * 2018-12-29 2021-11-24 Contemporary Amperex Technology Co., Limited Batterie secondaire et module batterie
CN112467260A (zh) * 2019-09-09 2021-03-09 苹果公司 金属壳电池
EP3790105A1 (fr) * 2019-09-09 2021-03-10 Apple Inc. Batterie à boîtier métallique
CN113363616A (zh) * 2021-06-17 2021-09-07 中国第一汽车股份有限公司 一种压力可调的液冷板、动力电池总成和车辆
WO2022262254A1 (fr) * 2021-06-17 2022-12-22 中国第一汽车股份有限公司 Plaque de refroidissement de liquide à pression réglable, ensemble batterie de traction et véhicule
WO2023138586A1 (fr) * 2022-01-21 2023-07-27 宁德新能源科技有限公司 Boîtier de batterie, batterie et dispositif électronique

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