WO2014129855A1 - Battery case provided with insulation resistance measurement units, pouch-type battery including same, and insulation resistance measurement system - Google Patents

Battery case provided with insulation resistance measurement units, pouch-type battery including same, and insulation resistance measurement system Download PDF

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Publication number
WO2014129855A1
WO2014129855A1 PCT/KR2014/001452 KR2014001452W WO2014129855A1 WO 2014129855 A1 WO2014129855 A1 WO 2014129855A1 KR 2014001452 W KR2014001452 W KR 2014001452W WO 2014129855 A1 WO2014129855 A1 WO 2014129855A1
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WO
WIPO (PCT)
Prior art keywords
insulation resistance
pouch
battery case
battery
resistance measurement
Prior art date
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PCT/KR2014/001452
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French (fr)
Korean (ko)
Inventor
홍영진
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(주)오렌지파워
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Publication of WO2014129855A1 publication Critical patent/WO2014129855A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
    • H01M50/116—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material
    • H01M50/121—Organic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • 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 of a single cell or a single battery
    • H01M50/116—Primary casings, jackets or wrappings of a single cell or a single battery 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 of a single cell or a single battery
    • H01M50/116—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material
    • H01M50/124—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material having a layered structure
    • 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 of a single cell or a single battery
    • H01M50/116—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material
    • H01M50/124—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material having a layered structure
    • H01M50/126—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material having a layered structure comprising three or more layers
    • H01M50/129—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material having a layered structure comprising three or more layers with two or more layers of only organic material
    • 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 of a single cell or a single battery
    • H01M50/131—Primary casings, jackets or wrappings of a single cell or a single battery characterised by physical properties, e.g. gas-permeability or size
    • H01M50/133—Thickness
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/025—Measuring very high resistances, e.g. isolation resistances, i.e. megohm-meters
    • 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 battery case having an insulation resistance measuring unit, a pouch type battery including the same, and an insulation resistance measuring system.
  • the pouch-type battery 100 includes an electrode assembly 300 and a pouch-type battery case 200.
  • the method of manufacturing the pouch-type battery 100 is a method of bonding the pouch raw material having a predetermined size so that the pouch-type battery case 200 surrounds the battery assembly 300 in the upper and lower portions of the electrode assembly 300. Is used.
  • the pouch-type battery case 200 is configured in the form of a metal barrier layer such as an aluminum thin film in order to protect the electrode assembly 300, to improve the electrochemical properties of the electrode assembly 300 and to improve heat dissipation.
  • the aluminum thin film is used in a form in which an insulating material such as polyethylene terephthalate (PET) resin or nylon (nylon) resin is coated.
  • the pouch type case When the pouch type case is used in a form in which the upper pouch and the lower pouch are bonded together, unstretched polypropylene (CPP: Casted PolyPropylene) or polypropylene (PP: PolyPropylene) may be used for adhesion to each other.
  • CPP Casted PolyPropylene
  • PP Polypropylene
  • the sealing portion which is an outer circumferential surface to which the 210 and the lower case 220 are bonded, has a structure of an outer coating layer, which is an insulating layer, a metal foil barrier layer such as aluminum, and an inner adhesive layer.
  • the electrode assembly 300 cannot maintain a steady state voltage. It may cause a low voltage, and may cause a swelling phenomenon. Since such problems may cause chain problems such as explosion of the battery cells, they may be fatal to the user or the equipment to be installed. Therefore, the pouch-type battery 100 may be thoroughly inspected and operated to remove the defective products. desirable.
  • a conventionally used method for inspecting insulation resistance and the like of the pouch-type battery 100 is to contact the electrode lead 410 or 420 with one metering means (probe) 510 electrically and expose the battery to the outside. This is performed by electrically contacting one metering means (probe) 510 to a metal foil barrier layer such as aluminum of the case 210 or 220 and measuring electrical property values between both probes 510.
  • a force is applied for physical contact between the metering means (probe) 510 and a metal foil barrier layer such as aluminum
  • the outer circumferential surface of the battery case 210 or 220 supports the force applied by the material property thereof. It is not easy to be deformed and has a problem that the inspection process becomes difficult.
  • the insulation test of the pouch-type battery 100 has such a problem that the reliability of the pouch-type battery 100 is significantly lowered and the test takes a lot of time. Therefore, it is difficult to remove the defective battery or damage the appearance of the battery case. Exposed.
  • such a conventional method is an obstacle to the automation of insulation inspection due to the above problems.
  • the present invention provides a battery case, a pouch-type battery including the same having a new type of insulation resistance measuring unit.
  • the present invention provides an insulation resistance measurement system including the insulation resistance measurement unit and the meter reading means.
  • the present invention includes an insulation resistance measurement unit protruding from a portion of the pouch-type battery case consisting of a sheet including an outer coating layer, a metal barrier layer, an inner sealant layer in order to solve the above problems, the insulation resistance measurement unit is a pouch type
  • a battery case comprising a probe hole from which an outer covering layer of the battery case is removed.
  • the diameter (d d ) of the probe hole is characterized in that it satisfies 0.5mm ⁇ d d ⁇ 5mm.
  • the battery case is characterized in that it comprises a plurality of the insulation resistance measuring unit.
  • the upper case and the lower case of the battery case is characterized in that each having the insulation resistance measuring unit.
  • it further comprises an interlayer adhesive layer between the outer coating layer and the metal barrier layer.
  • the outer coating layer is characterized by consisting of a first outer coating layer and a second outer coating layer.
  • the present invention also provides a battery case according to the present invention; And meter reading means having a probe part; It provides an insulation resistance measuring system comprising a.
  • the width (d w ) of the probe portion, the diameter (d d ) of the probe hole is characterized in that it satisfies 0.25d d ⁇ d w ⁇ 0.75d d .
  • the thickness of the outer coating layer (d e ), the thickness of the metal barrier layer (d x ) and the thickness of the interlayer adhesive layer (d f ), the length of the probe portion (L) is d e + d f + 0.25 It is characterized by satisfying the relationship of d x ⁇ L ⁇ d e + d f + 0.75d x .
  • the present invention also provides
  • Electrode assembly including anode, cathode, separator:
  • An electrode tab extending from the electrode assembly
  • It provides a pouch-type battery comprising the battery case according to the above to accommodate the electrode assembly, electrode tab and electrode lead.
  • the electrode assembly is characterized in that the stack or stack / folding type structure.
  • the battery is a pouch type battery which is a lithium secondary battery.
  • the present invention also provides a battery pack comprising the pouch-type battery according to the above.
  • the present invention provides a pouch type battery case in which the battery case forms an insulation resistance measurement unit, thereby easily and accurately measuring the insulation resistance measurement value without damaging the battery case protecting the electrode assembly.
  • FIG. 1 is a perspective view of a general structure of a typical representative pouch-type battery.
  • FIG. 2 is a perspective view showing an embodiment of the present invention.
  • FIG. 3 is a perspective view and an enlarged view showing an embodiment of the present invention.
  • Figure 4 is an enlarged view showing an embodiment of the present invention.
  • FIG. 5 is a perspective view showing an embodiment of the present invention.
  • the present invention includes an insulation resistance measurement unit (214, 224) protruding from a portion of the pouch-shaped battery case 200 consisting of a sheet including an outer coating layer (e), a metal barrier layer (x), an inner sealant layer (c).
  • the insulation resistance measuring unit provides a battery case 200 including probe holes 215 and 225 in which an outer coating layer of the pouch type battery case is removed.
  • the pouch-type battery case 200 if the insulation between the metal barrier layer (x) such as aluminum existing in the pouch exterior material and the electrode assembly 300 is not guaranteed, corrosion of the exterior material occurs, which causes leakage of the electrolyte. It is the cause of the accompanying battery 100 defective.
  • the pouch-type battery case 200 may be exposed to the outside of the metal barrier layer (x) through the pouch cutting due to the nature of the process.
  • Insulation resistance measurement unit 214, 224 is connected to a conventional battery case, has a separate form protruding to the outside, the needle surface of the flanges (213, 223) in the battery case 200 Since the probe is not probed, the damage of the battery case 200 itself is prevented.
  • the insulation resistance measuring unit 214, 224 of the present invention has a separate shape protruding from the case, and includes probe holes 215 and 225 from which the outer covering layer e is removed, whereby the probe unit of the metering means 510 Since the metal barrier layer (x) can be penetrated through the metal barrier layer (x) or the extra interlayer adhesive layer (f) left on the metal barrier layer through the probe holes 215 and 225, several layers exist in the battery case. The problem of preventing the stable contact between the means 510 and the metal barrier layer x can be solved, and a stable and accurate insulation resistance measurement can be obtained.
  • the insulation resistance measuring unit 214 or 224 of the present invention is not limited as long as it is added in a separate form protruding from a portion of the battery case 200, and may have various shapes, various connection sites, and various probe hole directions.
  • the electrode case 410 or 420 of the upper case 210 and the lower case 220 may be positioned in a semicircular shape.
  • in the embodiment of the present invention may be located in the shape of a triangle on the opposite side of the electrode leads (410, 420) of the upper case 210 and the lower case 220.
  • in one embodiment of the present invention may be located in the shape of a semi-circle on the side of the upper case 210 and the lower case 220.
  • the outer coating layer (e) is a polymer film, which maintains the mechanical strength of the pouch, forms an appearance, and By insulating function of, polyethylene naphthalate (PEN), polyethylene terephthalate (PET), nylon may be.
  • the metal barrier layer (x) serves to block air and moisture outside the pouch and may be an aluminum foil.
  • the inner sealant layer (c) serves to provide sealing in an embedded state, and may be non-stretched polypropylene (CPP) or polypropylene (PP).
  • the present invention may include an interlayer adhesive layer between the outer coating layer (e) and the metal barrier layer, wherein the interlayer adhesive layer (f) serves to bond the layers of the metal barrier layer (x) and the outer coating layer (e), Polyurethane (PU) series having excellent heat resistance may be used.
  • the interlayer adhesive layer (f) serves to bond the layers of the metal barrier layer (x) and the outer coating layer (e)
  • Polyurethane (PU) series having excellent heat resistance may be used.
  • the present invention also provides an insulation resistance measurement system including a battery case 200 having the insulation resistance measurement units 214 and 224, and a probe unit 510 having a probe unit.
  • the upper case 210 and the lower case 220 according to an embodiment of the present invention, the battery case 200 having the insulation resistance measuring unit (214, 224), the meter reading means 510 having a probe, and the measuring device
  • An insulation resistance measuring system including 500 is schematically illustrated.
  • the diameter d d of the probe holes 215 and 225 satisfies 0.5 mm ⁇ d d ⁇ 5 mm.
  • the width d w of the probe portion of the probe 510 and the diameter d d of the probe holes 215 and 225 satisfy 0.25d d ⁇ d w ⁇ 0.75d d .
  • the probe portion of the probe means 510 is in contact with the metal barrier layer (x), the outer coating layer (e) A sufficient contact area with the metal barrier layer x can be ensured without touching.
  • the thickness of the outer coating layer (d e ), the thickness of the metal barrier layer (d x ), the thickness of the interlayer adhesive layer (d f ) and the length of the probe portion (L) of the extra interlayer remaining on the metal barrier layer Through the adhesive layer f, the length can reach the inside of the metal barrier layer x, but not to reach the inner sealant layer c beyond the metal barrier layer, d e + d f + 0.25 d x ⁇ The relationship of L ⁇ d e + d f + 0.75d x is satisfied.
  • the outer coating layer (e) may be composed of a first outer coating layer (a) and a second outer coating layer (b). Specifically, the relationship d a + d b + d f + 0.25 d x ⁇ L ⁇ d a + d b + d f + 0.75d x is satisfied.
  • the first outer covering layer (a) of the outer covering layer (e) is 12um of PET
  • the second outer covering layer (b) of the outer covering layer (e) is 15um of nylon
  • the metal barrier layer (x) is 40um of aluminum.
  • the interlayer adhesive layer f may be 3 ⁇ m of polyurethane, and the length L of the probe may be 40 ⁇ m to 60 ⁇ m, and may be about 50 ⁇ m.
  • the width d w of the probe may be 0.125 mm to 3.75 mm, 0.25 mm to 1.5 mm, and about 1 mm.
  • the battery case 200 includes a plurality of the insulation resistance measuring unit, in particular, the upper case 210 and the lower case 220 includes the insulation resistance measuring unit (214, 224), respectively. It is possible.
  • the insulation resistance measurement is performed.
  • the part may be located in the upper case 210 or the lower case 220.
  • the metal barrier layer (x) of the upper case 210 and the lower case 220 of the battery case 200 are connected.
  • the insulation resistance measurement unit 214 of the upper case 210 and the insulation resistance measurement unit 224 of the lower case 220 may be provided separately, as shown in the enlarged surface of FIG. Two probe holes 215 and 225 of the upper surface and the lower surface of the lower case 220 may be provided.
  • the present invention also provides an electrode assembly comprising a positive electrode, a negative electrode, a separator 300: electrode tabs (430, 440) extending from the electrode assembly; Electrode leads 410 and 420 connected from the electrode tabs; And it provides a pouch-type battery 100 comprising the battery pouch for accommodating the electrode assembly, electrode tab and electrode lead.
  • the electrode assembly 300 may have a stack type or a stack / fold type structure.
  • the battery may be a lithium secondary battery, but is not limited thereto, and provides a high output large-capacity battery pack including a plurality of pouch-type batteries.
  • the probe means 510 having a probe portion includes a probe hole 410 and 420 of a battery and a probe hole of an insulation resistance measuring unit 214.224 of the battery.
  • the insulation resistance may be inspected from the contacting step of contacting the metal barrier layer (x) through 215 and 225, and the measuring step of measuring electrical property values between the contacted metering means 510.
  • the contacting step may contact the metering means 510 having the probe part with the metal barrier layer x through the probe holes 215 and 225, and may not contact the inner sealant c. .
  • the electrical property value may be composed of one or more of insulation resistance, current, or voltage, and since insulation is typically represented by insulation resistance, the resistance value may be measured.
  • the method may further include a determination step of determining the insulation by comparing the measured electrical characteristic value with a reference value in order to increase the reliability of the insulation inspection and to implement the automation function more efficiently.
  • the insulation may be determined by storing the reference value data of the resistance, the current, or the voltage in advance as a database, and receiving the measured value and comparing the measured value with the reference value data. For example, when the pouch-type battery 100 to be inspected is a good product, the resistance of the pouch-type battery 100 becomes an ideal infinity value, so the reference value for the resistance determining the insulation property is a considerably large value of several hundred M ⁇ or more. If the electrical characteristic value for current or voltage is used, the current value or voltage value that can represent insulation can be set as a reference value. Various examples are possible in the range which the skilled person can apply this example.
  • Top case 210 Ceiling surface 211, Side part 212, Flange 213
  • the present invention provides a pouch type battery case in which the battery case forms an insulation resistance measurement unit, thereby easily and accurately measuring the insulation resistance measurement value without damaging the battery case protecting the electrode assembly.

Abstract

The present invention provides a battery case of a pouch-type battery having insulation resistance measurement units, the pouch-type battery including the same, and an insulation resistance measurement system. The battery case of the present invention comprises insulation resistance measurement units protruding from a part of the pouch-type battery case having a sheet including outer coating layers, metal barrier layers, and inner sealant layers, wherein the insulation resistance measurement units include probe holes from which the outer coating layers of the pouch-type battery case have been removed such that insulation resistance measurement values can be easily and precisely measured without damage to the battery case for protecting an electrode assembly.

Description

절연저항 측정부를 구비하는 전지케이스, 이를 포함하는 파우치형 전지 및 절연저항 측정 시스템Battery case having insulation resistance measuring unit, pouch-type battery and insulation resistance measuring system including the same
본 발명은 절연저항 측정부를 구비하는 전지케이스, 이를 포함하는 파우치형 전지 및 절연저항 측정 시스템에 관한 것이다.The present invention relates to a battery case having an insulation resistance measuring unit, a pouch type battery including the same, and an insulation resistance measuring system.
파우치형 전지의 외형에 대한 사시도인 도 1과 같이 파우치형 전지(100)는 전극조립체(300), 파우치형 전지케이스(200)로 구성된다. 이러한 파우치형 전지(100)가 제조되는 방법은 파우치형 전지케이스(200)가 상기 전지조립체(300)를 감싸도록 소정 크기를 가지는 파우치 원자재를 전극조립체(300)의 상부 및 하부에서 접합시키는 방법이 이용된다. 이러한 파우치형 전지케이스(200)는 전극조립체(300)을 보호하고, 전극조립체(300)의 전기 화학적 성질에 대한 보완 및 방열성 등을 제고하기 위하여 알루미늄 박막과 같은 금속 베리어층의 형태로 구성되며, 상기 전극조립체(300)와 외부와의 절연성을 확보하게 위하여 상기 알루미늄 박막은 폴리에틸렌 테레프탈레이트(PET: PolyEthylene Terephthalate)수지 또는 나일론(nylon)수지 등의 절연물질이 코팅된 형태로 이용된다.As shown in FIG. 1, which is a perspective view of the appearance of the pouch-type battery, the pouch-type battery 100 includes an electrode assembly 300 and a pouch-type battery case 200. The method of manufacturing the pouch-type battery 100 is a method of bonding the pouch raw material having a predetermined size so that the pouch-type battery case 200 surrounds the battery assembly 300 in the upper and lower portions of the electrode assembly 300. Is used. The pouch-type battery case 200 is configured in the form of a metal barrier layer such as an aluminum thin film in order to protect the electrode assembly 300, to improve the electrochemical properties of the electrode assembly 300 and to improve heat dissipation. In order to secure insulation between the electrode assembly 300 and the outside, the aluminum thin film is used in a form in which an insulating material such as polyethylene terephthalate (PET) resin or nylon (nylon) resin is coated.
이러한 파우치형 케이스는 상부 파우치와 하부 파우치가 접합되는 형태로 이용되는 경우 상호 간의 접착을 위하여 무연신 폴리프로필렌(CPP: Casted PolyPropylene) 또는 폴리프로필렌(PP: PolyPropylene)이 사용될 수 있는데 이러한 경우, 상부케이스(210) 및 하부케이스(220)가 접합되는 외주면인 실링부는 절연층인 외부피복층, 알루미늄과 같은 금속박 베리어층 및 내부 접착층의 구조를 가지게 된다. When the pouch type case is used in a form in which the upper pouch and the lower pouch are bonded together, unstretched polypropylene (CPP: Casted PolyPropylene) or polypropylene (PP: PolyPropylene) may be used for adhesion to each other. In this case, the upper case The sealing portion, which is an outer circumferential surface to which the 210 and the lower case 220 are bonded, has a structure of an outer coating layer, which is an insulating layer, a metal foil barrier layer such as aluminum, and an inner adhesive layer.
외부 물리적 충격 등에 의하여 파우치형 전지(100)의 전지케이스(200) 내부 구조가 파손되거나 소손되어 파우치형 전지(100)의 절연성이 파괴되는 경우 전극조립체(300)는 정상상태 전압을 유지할 수 없게 되어 저전압을 유발할 수 있으며, 스웰링(swelling) 현상 등을 초래할 수 있다. 이러한 문제는 전지 셀의 폭발 등 연쇄적인 문제점을 야기할 수 있기 때문에 사용자 또는 장착되는 장비에 치명적일 수 있으므로 상기 파우치형 전지(100)의 절연성이 철저히 검사되어 불량품이 원천적으로 제거될 수 있도록 운용하는 것이 바람직하다.When the internal structure of the battery case 200 of the pouch-type battery 100 is damaged or damaged due to an external physical shock, etc., the insulation of the pouch-type battery 100 is destroyed, the electrode assembly 300 cannot maintain a steady state voltage. It may cause a low voltage, and may cause a swelling phenomenon. Since such problems may cause chain problems such as explosion of the battery cells, they may be fatal to the user or the equipment to be installed. Therefore, the pouch-type battery 100 may be thoroughly inspected and operated to remove the defective products. desirable.
파우치형 전지(100)의 절연저항 등을 검사하기 위하여 종래 일반적으로 사용되는 방법은 전극리드(410 또는 420)에 하나의 검침수단(프로브)(510)를 전기적으로 접촉시키고, 외부로 노출된 전지케이스(210 또는 220)의 알루미늄과 같은 금속박 베리어층에 하나의 검침수단(프로브)(510)를 전기적으로 접촉시키고 양 프로브(510) 간의 전기적 특성값을 측정함으로써 수행된다. 상기와 같은 방법에서는 검침수단(프로브)(510)과 알루미늄과 같은 금속박 베리어층과의 물리적 접촉을 위하여 힘이 가해지는 경우 전지케이스(210 또는 220) 외주면은 그 재질적 특성에 의하여 가해진 힘을 지탱하지 못하고 변형되기 쉬우므로 검사 과정이 어려워지는 문제점을 가진다. 결과적으로 이러한 제반 환경에 의하여 파우치형 전지(100)의 절연성 검사는 신뢰성이 현저히 저하되게 되고 검사에 많은 시간이 소요된다는 문제점을 가지게 되므로 불량 전지 제거의 어려움 또는 전지케이스 외형의 파손 등의 문제점에 그대로 노출되게 된다. 또한, 이러한 종래의 방법은 상기와 같은 문제점에 의하여 절연성 검사의 자동화에 장애 요인이 되고 있다.A conventionally used method for inspecting insulation resistance and the like of the pouch-type battery 100 is to contact the electrode lead 410 or 420 with one metering means (probe) 510 electrically and expose the battery to the outside. This is performed by electrically contacting one metering means (probe) 510 to a metal foil barrier layer such as aluminum of the case 210 or 220 and measuring electrical property values between both probes 510. In the above method, when a force is applied for physical contact between the metering means (probe) 510 and a metal foil barrier layer such as aluminum, the outer circumferential surface of the battery case 210 or 220 supports the force applied by the material property thereof. It is not easy to be deformed and has a problem that the inspection process becomes difficult. As a result, the insulation test of the pouch-type battery 100 has such a problem that the reliability of the pouch-type battery 100 is significantly lowered and the test takes a lot of time. Therefore, it is difficult to remove the defective battery or damage the appearance of the battery case. Exposed. In addition, such a conventional method is an obstacle to the automation of insulation inspection due to the above problems.
상기와 같은 문제를 해결하기 위하여, 본 발명은 새로운 형태의 절연저항 측정부를 구비한 전지케이스, 이를 포함하는 파우치형 전지를 제공한다. In order to solve the above problems, the present invention provides a battery case, a pouch-type battery including the same having a new type of insulation resistance measuring unit.
또한, 본 발명은 상기 절연저항 측정부 및 검침수단을 포함하는 절연저항 측정 시스템을 제공한다.In addition, the present invention provides an insulation resistance measurement system including the insulation resistance measurement unit and the meter reading means.
본 발명은 상기와 같은 과제를 해결하기 위하여 외부 피복층, 금속 베리어층, 내부 실런트층을 포함하는 시트로 이루어지는 파우치형 전지 케이스의 일부분으로부터 돌출되는 절연저항 측정부를 포함하고, 상기 절연저항 측정부는 파우치형 전지 케이스의 외부 피복층이 제거된 탐침홀을 포함하는 것을 특징으로 하는 전지케이스를 제공한다.The present invention includes an insulation resistance measurement unit protruding from a portion of the pouch-type battery case consisting of a sheet including an outer coating layer, a metal barrier layer, an inner sealant layer in order to solve the above problems, the insulation resistance measurement unit is a pouch type Provided is a battery case comprising a probe hole from which an outer covering layer of the battery case is removed.
본 발명에 있어서, 상기 탐침홀의 직경(dd)은 0.5mm ≤ dd ≤ 5mm를 만족하는 것을 특징으로 한다.In the present invention, the diameter (d d ) of the probe hole is characterized in that it satisfies 0.5mm ≤ d d ≤ 5mm.
본 발명에 있어서, 상기 전지케이스는 상기 절연저항 측정부를 복수개 포함하는 것을 특징으로 한다.In the present invention, the battery case is characterized in that it comprises a plurality of the insulation resistance measuring unit.
본 발명에 있어서, 상기 전지케이스의 상부케이스 및 하부케이스가 상기 절연저항 측정부를 각각 가지는 것을 특징으로 한다.In the present invention, the upper case and the lower case of the battery case is characterized in that each having the insulation resistance measuring unit.
본 발명에 있어서, 상기 외부 피복층 및 금속 베리어층 사이에 층간 접착층을 추가로 포함하는 것을 특징으로 한다.In the present invention, it further comprises an interlayer adhesive layer between the outer coating layer and the metal barrier layer.
본 발명에 있어서, 상기 외부 피복층은 제1외부 피복층 및 제2외부 피복층으로 구성되는 것을 특징으로 한다.In the present invention, the outer coating layer is characterized by consisting of a first outer coating layer and a second outer coating layer.
본 발명은 또한, 본 발명에 의한 전지케이스; 및 탐침부를 구비한 검침수단; 을 포함하는 절연저항 측정 시스템을 제공한다.The present invention also provides a battery case according to the present invention; And meter reading means having a probe part; It provides an insulation resistance measuring system comprising a.
본 발명에 있어서, 상기 탐침부의 폭(dw), 상기 탐침홀의 직경(dd)은 0.25dd ≤ dw ≤ 0.75dd를 만족하는 것을 특징으로 한다.In the present invention, the width (d w ) of the probe portion, the diameter (d d ) of the probe hole is characterized in that it satisfies 0.25d d ≤ d w ≤ 0.75d d .
본 발명에 있어서, 상기 외부 피복층의 두께(de), 상기 금속 베리어층의 두께(dx) 및 상기 층간 접착층의 두께(df), 탐침부의 길이(L)은 de + df + 0.25dx ≤ L ≤ de + df + 0.75dx 의 관계를 만족하는 것을 특징으로 한다.In the present invention, the thickness of the outer coating layer (d e ), the thickness of the metal barrier layer (d x ) and the thickness of the interlayer adhesive layer (d f ), the length of the probe portion (L) is d e + d f + 0.25 It is characterized by satisfying the relationship of d x ≤ L ≤ d e + d f + 0.75d x .
본 발명은 또한, The present invention also provides
양극, 음극, 분리막을 포함하는 전극조립체:Electrode assembly including anode, cathode, separator:
상기 전극 조립체로부터 연장된 전극탭;An electrode tab extending from the electrode assembly;
상기 전극탭으로부터 연결된 전극리드;및An electrode lead connected from the electrode tab; and
상기 전극조립체, 전극탭 및 전극리드를 수용하는 상기에 따른 전지케이스를 포함하는 파우치형 전지를 제공한다.It provides a pouch-type battery comprising the battery case according to the above to accommodate the electrode assembly, electrode tab and electrode lead.
본 발명에 있어서, 상기 전극조립체는 스택형 또는 스택/폴딩형 구조인 것을 특징으로 한다. In the present invention, the electrode assembly is characterized in that the stack or stack / folding type structure.
본 발명에 있어서, 상기 전지는 리튬 이차전지인 파우치형 전지인 것을 특징으로 한다.In the present invention, the battery is a pouch type battery which is a lithium secondary battery.
본 발명은 또한, 상기에 따른 파우치형 전지를 포함하고 있는 전지팩을 제공한다.The present invention also provides a battery pack comprising the pouch-type battery according to the above.
본 발명은 전지케이스가 절연저항 측정부를 형성하여, 전극조립체를 보호하는 전지케이스를 손상하지 않으면서도 절연저항 측정값을 용이하고 정확하게 측정하는 파우치형 전지케이스를 제공한다. The present invention provides a pouch type battery case in which the battery case forms an insulation resistance measurement unit, thereby easily and accurately measuring the insulation resistance measurement value without damaging the battery case protecting the electrode assembly.
도 1은 종래의 대표적인 파우치형 전지의 일반적인 구조에 대한 사시도이다.1 is a perspective view of a general structure of a typical representative pouch-type battery.
도 2는 본 발명의 일 실시예를 나타낸 사시도이다.2 is a perspective view showing an embodiment of the present invention.
도 3은 본 발명의 일 실시예를 나타낸 사시도 및 확대도이다.3 is a perspective view and an enlarged view showing an embodiment of the present invention.
도 4는 본 발명의 일 실시예를 나타낸 확대도이다.Figure 4 is an enlarged view showing an embodiment of the present invention.
도 5는 본 발명의 일 실시예를 나타낸 사시도이다. 5 is a perspective view showing an embodiment of the present invention.
본 발명은 외부 피복층(e), 금속 베리어층(x), 내부 실런트층(c)을 포함하는 시트로 이루어지는 파우치형 전지 케이스(200)의 일부분으로부터 돌출되는 절연저항 측정부(214,224)를 포함하고, 상기 절연저항 측정부는 파우치형 전지 케이스의 외부 피복층이 제거된 탐침홀(215,225)을 포함하는 것을 특징으로 하는 전지케이스(200)를 제공한다.The present invention includes an insulation resistance measurement unit (214, 224) protruding from a portion of the pouch-shaped battery case 200 consisting of a sheet including an outer coating layer (e), a metal barrier layer (x), an inner sealant layer (c). The insulation resistance measuring unit provides a battery case 200 including probe holes 215 and 225 in which an outer coating layer of the pouch type battery case is removed.
도 2, 도 3 및 도 5에 본 발명의 일 실시예에 따른 절연저항 측정부(214, 224)를 가지는 전지케이스를 모식적으로 도시하였다. 파우치형 전지케이스(200)의 경우, 파우치 외장재 내부에 존재하는 알루미늄과 같은 금속 베리어층(x)과 전극조립체(300)와의 절연성이 보장되지 않으면, 외장재의 부식이 발생하고 이는 전해액의 누액 발생을 동반하는 전지(100) 불량의 원인이 된다. 특히, 파우치형 전지케이스(200)는 공정의 특성상 파우치 절단을 통하여 금속 베리어층(x)이 외부로 노출될 수 있다. 본 발명에 따른 절연저항 측정부(214, 224)는 종래의 전지케이스에 연결되고, 외부로 돌출된 별도의 형태를 가지며, 전지케이스(200) 내 플랜지부(213, 223)의 실링면을 침상의 탐침부로 탐침하지 않기 때문에, 전지케이스(200) 자체의 손상을 방지한다. 2, 3 and 5 schematically show a battery case having insulation resistance measuring units 214 and 224 according to an embodiment of the present invention. In the case of the pouch-type battery case 200, if the insulation between the metal barrier layer (x) such as aluminum existing in the pouch exterior material and the electrode assembly 300 is not guaranteed, corrosion of the exterior material occurs, which causes leakage of the electrolyte. It is the cause of the accompanying battery 100 defective. In particular, the pouch-type battery case 200 may be exposed to the outside of the metal barrier layer (x) through the pouch cutting due to the nature of the process. Insulation resistance measurement unit 214, 224 according to the present invention is connected to a conventional battery case, has a separate form protruding to the outside, the needle surface of the flanges (213, 223) in the battery case 200 Since the probe is not probed, the damage of the battery case 200 itself is prevented.
또한, 본 발명의 절연저항 측정부(214, 224)는 케이스에 돌출된 별도의 형태를 가지고, 외부 피복층(e)이 제거된 탐침홀(215,225)을 포함함으로써, 검침수단(510)의 탐침부가 탐침홀(215,225)을 통하여 금속 베리어층(x) 또는 금속 베리어층 위에 남겨진 여분의 층간 접착층(f)을 뚫고 금속베리어층(x)에 도달할 수 있으므로, 전지케이스 내부에 여러 층이 존재하여 검침수단(510)과 금속 베리어층(x)의 안정적인 접촉을 방해하는 문제점을 해결하고, 안정하고 정확한 절연저항 측정값을 얻을 수 있다. In addition, the insulation resistance measuring unit 214, 224 of the present invention has a separate shape protruding from the case, and includes probe holes 215 and 225 from which the outer covering layer e is removed, whereby the probe unit of the metering means 510 Since the metal barrier layer (x) can be penetrated through the metal barrier layer (x) or the extra interlayer adhesive layer (f) left on the metal barrier layer through the probe holes 215 and 225, several layers exist in the battery case. The problem of preventing the stable contact between the means 510 and the metal barrier layer x can be solved, and a stable and accurate insulation resistance measurement can be obtained.
본 발명의 절연저항 측정부(214, 224)는 전지케이스(200)의 일부분으로부터 돌출된 별도의 형태로 부가된 것이면 제한되지 아니하고, 다양한 형상, 다양한 연결부위 및 다양한 탐침홀 방향을 가질 수 있다. 도 2를 참조하면, 본 발명의 일 실시예에서 상부케이스(210) 및 하부케이스(220)의 전극리드(410, 420)사이에 반원의 형상으로 위치할 수 있다. 또한, 도 3을 참조하면, 본 발명의 일 실시예에서 상부케이스(210) 및 하부케이스(220)의 전극리드(410, 420)반대편에 삼각형의 형상으로 위치할 수 있다. 또한, 도 5을 참조하면, 본 발명의 일 실시예에서 상부케이스(210) 및 하부케이스(220)의 측면에 반원의 형상으로 위치할 수 있다.The insulation resistance measuring unit 214 or 224 of the present invention is not limited as long as it is added in a separate form protruding from a portion of the battery case 200, and may have various shapes, various connection sites, and various probe hole directions. Referring to FIG. 2, in an embodiment of the present invention, the electrode case 410 or 420 of the upper case 210 and the lower case 220 may be positioned in a semicircular shape. In addition, referring to Figure 3, in the embodiment of the present invention may be located in the shape of a triangle on the opposite side of the electrode leads (410, 420) of the upper case 210 and the lower case 220. In addition, referring to Figure 5, in one embodiment of the present invention may be located in the shape of a semi-circle on the side of the upper case 210 and the lower case 220.
본 발명의 외부 피복층(e), 금속 베리어층(x), 내부 실런트층(c)에 있어서, 상기 외부 피복층(e)은 고분자 필름으로 파우치의 기계적 강도를 유지하고, 외관을 형성하며, 외부와의 절연기능을 하는 것으로, 폴리에틸렌 나프탈레이트(PEN), 폴리에틸렌 테레프탈레이트(PET), 나일론일 수 있다. 상기 금속 베리어층(x)은 파우치 외부의 공기와 수분을 차단하는 역할을 하며, 알루미늄 포일 일 수 있다. 상기 내부 실런트층(c)은 내장한 상태에서 밀봉성을 제공하는 역할을 하며, 무연신 폴리프로필렌(CPP) 또는 폴리프로필렌(PP)일 수 있다. In the outer coating layer (e), the metal barrier layer (x) and the inner sealant layer (c) of the present invention, the outer coating layer (e) is a polymer film, which maintains the mechanical strength of the pouch, forms an appearance, and By insulating function of, polyethylene naphthalate (PEN), polyethylene terephthalate (PET), nylon may be. The metal barrier layer (x) serves to block air and moisture outside the pouch and may be an aluminum foil. The inner sealant layer (c) serves to provide sealing in an embedded state, and may be non-stretched polypropylene (CPP) or polypropylene (PP).
본 발명은 외부 피복층(e) 및 금속 베리어층 사이에 층간 접착층을 포함할 수 있으며, 상기 층간 접착층(f)은 금속 베리어층(x) 및 외부 피복층(e)의 층을 접착하는 역할을 하며, 내열성이 우수한 폴리우레탄(PU) 계열이 사용될 수 있다.The present invention may include an interlayer adhesive layer between the outer coating layer (e) and the metal barrier layer, wherein the interlayer adhesive layer (f) serves to bond the layers of the metal barrier layer (x) and the outer coating layer (e), Polyurethane (PU) series having excellent heat resistance may be used.
본 발명은 또한, 상기 절연저항 측정부(214, 224)를 가지는 전지케이스(200), 및 탐침부를 구비한 검침수단(510)을 포함하는 절연저항 측정 시스템을 제공한다. The present invention also provides an insulation resistance measurement system including a battery case 200 having the insulation resistance measurement units 214 and 224, and a probe unit 510 having a probe unit.
도 5에 본 발명의 일 실시예에 따라 상부케이스(210) 및 하부케이스(220)가 절연저항 측정부(214,224)를 가지는 전지케이스(200), 탐침부를 가지는 검침수단(510), 및 측정장치(500)을 포함하는 절연저항 측정 시스템을 모식적으로 도시하였다. 5, the upper case 210 and the lower case 220 according to an embodiment of the present invention, the battery case 200 having the insulation resistance measuring unit (214, 224), the meter reading means 510 having a probe, and the measuring device An insulation resistance measuring system including 500 is schematically illustrated.
본 발명에 있어서, 상기 탐침홀(215,225)의 직경(dd)은 0.5mm ≤ dd ≤ 5mm를 만족한다.In the present invention, the diameter d d of the probe holes 215 and 225 satisfies 0.5 mm ≤ d d ≤ 5 mm.
본 발명에 있어서, 검침수단(510)의 탐침부의 폭(dw), 상기 탐침홀(215,225)의 직경(dd)은 0.25dd ≤ dw ≤ 0.75dd를 만족한다. 탐침부의 폭(dw)과 상기 탐침홀(215,225)의 직경(dd)이 상기와 같은 범위에서 검침수단(510)의 탐침부가 금속 베리어층(x)에 접촉시, 외부 피복층(e)에 닿지 않으면서 금속 베리어층(x)과의 충분한 접촉 면적을 확보할 수 있다.In the present invention, the width d w of the probe portion of the probe 510 and the diameter d d of the probe holes 215 and 225 satisfy 0.25d d ≦ d w ≦ 0.75d d . When the width of the probe portion (d w ) and the diameter (d d ) of the probe holes (215, 225) in the above range, the probe portion of the probe means 510 is in contact with the metal barrier layer (x), the outer coating layer (e) A sufficient contact area with the metal barrier layer x can be ensured without touching.
본 발명에 있어서, 상기 외부 피복층의 두께(de), 상기 금속 베리어층의 두께(dx), 층간 접착층의 두께(df) 및 탐침부의 길이(L)는 금속 베리어층 위에 남겨진 여분의 층간 접착층(f)을 뚫고 들어가, 그 길이가 금속 베리어층(x) 내부까지 도달할 수 있으나, 금속 베리어층을 넘어 내부 실런트층(c)까지는 도달하지 않도록, de + df + 0.25dx ≤ L ≤ de + df + 0.75dx 의 관계를 만족한다.In the present invention, the thickness of the outer coating layer (d e ), the thickness of the metal barrier layer (d x ), the thickness of the interlayer adhesive layer (d f ) and the length of the probe portion (L) of the extra interlayer remaining on the metal barrier layer Through the adhesive layer f, the length can reach the inside of the metal barrier layer x, but not to reach the inner sealant layer c beyond the metal barrier layer, d e + d f + 0.25 d x ≤ The relationship of L ≤ d e + d f + 0.75d x is satisfied.
본 발명에 있어서, 상기 외부 피복층(e)은 제1외부 피복층(a) 및 제2외부 피복층(b)으로 구성될 수 있다. 상세하게는, da + db + df + 0.25dx ≤ L ≤ da + db + df + 0.75dx 의 관계를 만족한다. 예를 들어, 외부 피복층(e)의 제1외부 피복층(a)은 12um의 PET, 외부 피복층(e)의 제2외부 피복층(b)는 15um의 나일론, 금속 베리어층(x)은 40um의 알루미늄, 층간 접착층(f)은 3um의 폴리우레탄일 수 있고, 이 때, 탐침부의 길이(L) 은 40um 내지 60um일 수 있고, 약 50um일 수 있다. 또한 탐침부의 폭(dw)은 0.125mm 내지 3.75mm일 수 있고, 0.25mm 내지 1.5mm일 수 있으며, 약 1mm일 수 있다.In the present invention, the outer coating layer (e) may be composed of a first outer coating layer (a) and a second outer coating layer (b). Specifically, the relationship d a + d b + d f + 0.25 d x ≤ L ≤ d a + d b + d f + 0.75d x is satisfied. For example, the first outer covering layer (a) of the outer covering layer (e) is 12um of PET, the second outer covering layer (b) of the outer covering layer (e) is 15um of nylon, and the metal barrier layer (x) is 40um of aluminum. The interlayer adhesive layer f may be 3 μm of polyurethane, and the length L of the probe may be 40 μm to 60 μm, and may be about 50 μm. In addition, the width d w of the probe may be 0.125 mm to 3.75 mm, 0.25 mm to 1.5 mm, and about 1 mm.
본 발명에 있어서, 상기 전지케이스(200)는 상기 절연저항 측정부를 복수개 포함하고, 특히, 상부케이스(210) 및 하부케이스(220)가 상기 절연저항 측정부(214, 224)를 각각 포함하는 것이 가능하다. In the present invention, the battery case 200 includes a plurality of the insulation resistance measuring unit, in particular, the upper case 210 and the lower case 220 includes the insulation resistance measuring unit (214, 224), respectively. It is possible.
파우치 한장을 접어서 전지케이스(200)로 사용하는 경우와 같이, 전지케이스(200)의 상부케이스(210) 및 하부케이스(220)의 금속 베리어층(x)이 연결되어 있는 경우, 상기 절연저항 측정부는 상부케이스(210) 또는 하부케이스(220)에 위치할 수 있다. In the case where the pouch is folded and used as the battery case 200, when the metal barrier layer (x) of the upper case 210 and the lower case 220 of the battery case 200 is connected, the insulation resistance measurement is performed. The part may be located in the upper case 210 or the lower case 220.
또한 상부케이스(210) 및 하부케이스(220)를 별도로 구성하여 실링 및 접합하는 경우와 같이, 전지케이스(200)의 상부케이스(210) 및 하부케이스(220)의 금속 베리어층(x)이 연결되어 있지 않은 경우, 상부케이스(210)의 절연저항 측정부(214) 및 하부케이스(220)의 절연저항 측정부(224)를 별도로 구비할 수 있고, 도 3의 확대면과 같이 상부케이스(210)의 상면 및 하부케이스(220)의 하면의 두 개의 탐침홀(215,225)을 구비할 수 있다. In addition, as in the case where the upper case 210 and the lower case 220 are separately configured to seal and bond, the metal barrier layer (x) of the upper case 210 and the lower case 220 of the battery case 200 are connected. If not, the insulation resistance measurement unit 214 of the upper case 210 and the insulation resistance measurement unit 224 of the lower case 220 may be provided separately, as shown in the enlarged surface of FIG. Two probe holes 215 and 225 of the upper surface and the lower surface of the lower case 220 may be provided.
본 발명은 또한, 본 발명은 또한, 양극, 음극, 분리막을 포함하는 전극조립체(300): 상기 전극 조립체로부터 연장된 전극탭(430, 440); 상기 전극탭으로부터 연결된 전극리드(410, 420); 및 상기 전극조립체, 전극탭 및 전극리드를 수용하는 상기의 전지용 파우치를 포함하는 파우치형 전지(100)를 제공한다. 상기 전극조립체(300)는 스택형 또는 스택/폴딩형 구조일 수 있다.The present invention also provides an electrode assembly comprising a positive electrode, a negative electrode, a separator 300: electrode tabs (430, 440) extending from the electrode assembly; Electrode leads 410 and 420 connected from the electrode tabs; And it provides a pouch-type battery 100 comprising the battery pouch for accommodating the electrode assembly, electrode tab and electrode lead. The electrode assembly 300 may have a stack type or a stack / fold type structure.
본 발명에 있어서, 상기 전지는 리튬 이차전지일 수 있으나, 이에 제한되지 않으며, 상기 파우치형 전지를 다수개 포함하고 있는 고출력 대용량의 중대형 전지팩을 제공한다. In the present invention, the battery may be a lithium secondary battery, but is not limited thereto, and provides a high output large-capacity battery pack including a plurality of pouch-type batteries.
*도 5를 참조하면, 본 발명의 일 실시예에서, 탐침부를 가지는 검침수단(510)을 전지의 전극리드(410, 420) 및 상기 전지의 절연저항 측정부(214. 224)의 탐침홀(215,225) 통하여 금속 베리어층(x)에 접촉시키는 접촉단계, 및 상기 접촉된 검침수단(510) 간의 전기적 특성 값을 측정하는 측정단계로부터 절연저항을 검사할 수 있다.Referring to FIG. 5, in one embodiment of the present invention, the probe means 510 having a probe portion includes a probe hole 410 and 420 of a battery and a probe hole of an insulation resistance measuring unit 214.224 of the battery. The insulation resistance may be inspected from the contacting step of contacting the metal barrier layer (x) through 215 and 225, and the measuring step of measuring electrical property values between the contacted metering means 510.
본 발명의 일 실시예에서, 상기 접촉단계는 상기 탐침부를 가지는 검침수단(510)을 탐침홀(215,225)을 통하여 금속 베리어층(x)에 접촉시키고, 내부 실런트(c)에는 접촉시키지 않을 수 있다.In an embodiment of the present disclosure, the contacting step may contact the metering means 510 having the probe part with the metal barrier layer x through the probe holes 215 and 225, and may not contact the inner sealant c. .
또한, 상기 전기적 특성 값은 절연 저항, 전류 또는 전압 중 하나 이상으로 구성될 수 있으며, 통상적으로 절연성은 절연저항으로 대표되므로 저항값을 측정할 수 있다. In addition, the electrical property value may be composed of one or more of insulation resistance, current, or voltage, and since insulation is typically represented by insulation resistance, the resistance value may be measured.
*추가로, 절연성 검사의 신뢰성을 높이고 자동화 기능을 더욱 효율적으로 구현하기 위하여 상기 측정된 전기적 특성 값과 기준 값을 비교하여 상기 절연성을 판단하는 판단단계를 더 포함할 수 있다. 따라서, 저항, 전류 또는 전압에 대한 기준값 데이터를 미리 데이터베이스화하여 저장하고, 측정된 값을 입력받아 상기 기준값 데이터와 비교함으로써 절연성을 판단할 수 있게 된다. 예를 들어, 검사 대상 파우치형 전지(100)가 양품인 경우, 상기 파우치형 전지(100)의 저항은 이상적인 무한대의 값이 되므로 상기 절연성을 판단하는 저항에 대한 기준값은 수백 MΩ이상의 상당히 큰 값으로 설정하며, 만약 전류 또는 전압에 대한 전기적 특성 값을 이용하는 경우에는 절연성을 대표할 수 있는 전류값 또는 전압값을 기준값으로 설정할 수 있다. 이러한 예를 통상의 기술자가 응용 가능한 범위에서 다양한 실시예가 가능함은 물론이다. In addition, the method may further include a determination step of determining the insulation by comparing the measured electrical characteristic value with a reference value in order to increase the reliability of the insulation inspection and to implement the automation function more efficiently. Accordingly, the insulation may be determined by storing the reference value data of the resistance, the current, or the voltage in advance as a database, and receiving the measured value and comparing the measured value with the reference value data. For example, when the pouch-type battery 100 to be inspected is a good product, the resistance of the pouch-type battery 100 becomes an ideal infinity value, so the reference value for the resistance determining the insulation property is a considerably large value of several hundred MΩ or more. If the electrical characteristic value for current or voltage is used, the current value or voltage value that can represent insulation can be set as a reference value. Various examples are possible in the range which the skilled person can apply this example.
상술한 본 발명의 기술적 구성은 본 발명이 속하는 기술분야의 통상의 기술자가 본 발명의 그 기술적 사상이나 필수적 특징을 변경하지 않고서 다른 구체적인 형태로 실시될 수 있다는 것을 이해할 수 있을 것이다. 그러므로 이상에서 기술한 실시예는 모든 면에서 예시적인 것이며 한정적인 것이 아닌 것으로 이해되어야 한다. 아울러, 본 발명의 범위는 상기의 상세한 설명보다는 후술하는 특허청구범위에 의하여 나타내어진다. 또한, 특허청구범위의 의미 및 범위 그리고 그 등가 개념으로부터 도출되는 모든 변경 또는 변형된 형태가 본 발명의 범위에 포함되는 것으로 해석되어야 한다.It will be appreciated that the technical configuration of the present invention described above may be implemented in other specific forms by those skilled in the art without changing the technical spirit or essential features of the present invention. Therefore, it is to be understood that the embodiments described above are exemplary in all respects and not restrictive. In addition, the scope of the present invention is indicated by the appended claims rather than the detailed description above. Also, it is to be construed that all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts are included in the scope of the present invention.
부호의 설명Explanation of the sign
전지 100 Battery 100
전지케이스 200, Battery case 200,
상부케이스 210, 천정면 211, 측면부 212, 플랜지부 213 Top case 210, Ceiling surface 211, Side part 212, Flange 213
하부케이스 220, 저면 221, 측면부 222, 플랜지부 223 Lower case 220, Bottom 221, Side portion 222, Flange 223
상부케이스의 절연저항 측정부 214, 하부케이스의 절연저항 측정부 224Insulation resistance measurement unit 214 of the upper case, insulation resistance measurement unit 224 of the lower case
상부케이스의 탐침홀 215, 하부케이스의 탐침홀 225 Probe hole 215 in the upper case, probe hole 225 in the lower case
전극조립체 300 Electrode Assembly 300
전극리드 410, 420, 전극탭 430, 440Electrode Leads 410, 420, Electrode Tabs 430, 440
500 측정장치, 검침수단(프로브)510500 Measuring device, probe (probe) 510
본 발명은 전지케이스가 절연저항 측정부를 형성하여, 전극조립체를 보호하는 전지케이스를 손상하지 않으면서도 절연저항 측정값을 용이하고 정확하게 측정하는 파우치형 전지케이스를 제공한다. The present invention provides a pouch type battery case in which the battery case forms an insulation resistance measurement unit, thereby easily and accurately measuring the insulation resistance measurement value without damaging the battery case protecting the electrode assembly.

Claims (13)

  1. 외부 피복층, 금속 베리어층, 내부 실런트층을 포함하는 시트로 이루어지는 파우치형 전지 케이스의 일부분으로부터 돌출되는 절연저항 측정부를 구비하고, An insulation resistance measurement part protruding from a portion of the pouch type battery case comprising a sheet including an outer coating layer, a metal barrier layer, and an inner sealant layer,
    상기 절연저항 측정부는 상기 파우치형 전지 케이스의 외부 피복층이 제거된 탐침홀을 포함하는 것을 특징으로 하는 절연저항 측정부를 구비한 전지케이스.And the insulation resistance measuring unit includes a probe hole from which an outer coating layer of the pouch type battery case is removed.
  2. 제 1 항에 있어서, The method of claim 1,
    상기 탐침홀의 직경(dd)은 0.5mm≤ dd ≤5mm를 만족하는 전지케이스.A diameter (d d ) of the probe hole satisfies 0.5mm ≦ d d ≦ 5mm.
  3. 제 1 항에 있어서, The method of claim 1,
    상기 전지케이스는 상기 절연저항 측정부를 복수개 포함하는 것을 특징으로 하는 전지케이스.The battery case is characterized in that it comprises a plurality of insulation resistance measuring unit.
  4. 제 1 항에 있어서, The method of claim 1,
    상기 전지케이스의 상부케이스 및 하부케이스가 각각 상기 절연저항 측정부를 포함하는 것을 특징으로 하는 전지케이스.The battery case, characterized in that the upper case and the lower case of the battery case each comprises the insulation resistance measuring unit.
  5. 제 1 항에 있어서, The method of claim 1,
    상기 외부 피복층 및 상기 금속 베리어층 사이에 층간 접착층을 추가로 포함하는 전지케이스.The battery case further comprises an interlayer adhesive layer between the outer coating layer and the metal barrier layer.
  6. 제 1 항에 있어서, The method of claim 1,
    상기 외부 피복층은 제1 외부 피복층 및 제2 외부 피복층으로 구성되는 전지케이스.The outer coating layer is a battery case consisting of a first outer coating layer and a second outer coating layer.
  7. 제 1 항에 의한 전지케이스; 및 A battery case according to claim 1; And
    탐침부를 구비한 검침수단; 을 포함하는 절연저항 측정 시스템.Meter reading means having a probe section; Insulation resistance measuring system comprising a.
  8. 제 7 항에 있어서, The method of claim 7, wherein
    상기 탐침부의 폭(dw)와 상기 탐침홀의 직경(dd)은 0.25dd ≤ dw ≤ 0.75dd 관계를 만족하는 것을 특징으로 하는 절연저항 측정 시스템.Insulation resistance measuring system characterized in that the width of the probe (d w ) and the diameter of the probe hole (d d ) satisfies the relationship 0.25d d ≤ d w ≤ 0.75d d .
  9. 제 7 항에 있어서,The method of claim 7, wherein
    상기 전지 케이스의 외부 피복층의 두께(de), 상기 금속 베리어층의 두께(dx) 및 상기 층간 접착층의 두께(df), 상기 검침 수단의 탐침부의 길이(L)은 de + df + 0.25dx ≤ L ≤ de + df + 0.75dx 의 관계를 만족하는 절연저항 측정 시스템.The thickness d e of the outer coating layer of the battery case, the thickness d x of the metal barrier layer, the thickness d f of the interlayer adhesive layer, and the length L of the probe of the metering means are d e + d f. Insulation resistance measurement system that satisfies the relationship + 0.25d x ≤ L ≤ d e + d f + 0.75d x .
  10. 양극, 음극, 분리막을 포함하는 전극조립체:Electrode assembly including anode, cathode, separator:
    상기 전극 조립체로부터 연장된 전극탭;An electrode tab extending from the electrode assembly;
    상기 전극탭으로부터 연결된 전극리드; 및An electrode lead connected from the electrode tab; And
    상기 전극조립체, 전극탭 및 전극리드를 수용하는 제 1 항 내지 제 6 항 중 어느 한 항에 의한 전지케이스;를 포함하는 파우치형 전지.Pouch-type battery comprising a; battery case according to any one of claims 1 to 6 for receiving the electrode assembly, electrode tab and electrode lead.
  11. 제 10 항에 있어서, The method of claim 10,
    상기 전극조립체는 스택형 또는 스택/폴딩형 구조인 파우치형 전지.The electrode assembly is a pouch-type battery having a stack type or a stack / folding type structure.
  12. 제 10 항에 있어서, The method of claim 10,
    상기 전지는 리튬 이차전지인 파우치형 전지.The battery is a pouch type battery which is a lithium secondary battery.
  13. 제 10 항 내지 제 12 항 중 어느 한 항에 따른 파우치형 전지를 포함하고 있는 전지팩.A battery pack comprising a pouch-type battery according to any one of claims 10 to 12.
PCT/KR2014/001452 2013-02-22 2014-02-24 Battery case provided with insulation resistance measurement units, pouch-type battery including same, and insulation resistance measurement system WO2014129855A1 (en)

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