KR20200104619A - Battery pack structure - Google Patents

Battery pack structure Download PDF

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Publication number
KR20200104619A
KR20200104619A KR1020190023168A KR20190023168A KR20200104619A KR 20200104619 A KR20200104619 A KR 20200104619A KR 1020190023168 A KR1020190023168 A KR 1020190023168A KR 20190023168 A KR20190023168 A KR 20190023168A KR 20200104619 A KR20200104619 A KR 20200104619A
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South Korea
Prior art keywords
case
battery pack
pack structure
fireproof paint
pressure regulator
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KR1020190023168A
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Korean (ko)
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김길섭
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에이치엘그린파워 주식회사
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Priority to KR1020190023168A priority Critical patent/KR20200104619A/en
Publication of KR20200104619A publication Critical patent/KR20200104619A/en

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    • H01M2/1094—
    • 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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
    • H01M50/24—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries from their environment, e.g. from corrosion
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C2/00—Fire prevention or containment
    • A62C2/06—Physical fire-barriers
    • A62C2/065—Physical fire-barriers having as the main closure device materials, whose characteristics undergo an irreversible change under high temperatures, e.g. intumescent
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
    • A62C3/16—Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6561—Gases
    • H01M10/6566—Means within the gas flow to guide the flow around one or more cells, e.g. manifolds, baffles or other barriers
    • H01M2/1077—
    • H01M2/206—
    • H01M2/345—
    • H01M2/348—
    • 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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • 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
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/574—Devices or arrangements for the interruption of current
    • H01M50/578—Devices or arrangements for the interruption of current in response to pressure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/574—Devices or arrangements for the interruption of current
    • H01M50/581—Devices or arrangements for the interruption of current in response to temperature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2200/00—Safety devices for primary or secondary batteries
    • H01M2200/10—Temperature sensitive devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2200/00—Safety devices for primary or secondary batteries
    • H01M2200/20—Pressure-sensitive devices
    • 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

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

The present invention relates to a battery pack structure comprising: a battery module in which a plurality of cells are embedded; a case containing a plurality of battery modules; and a pressure regulator mounted on the case to circulate air between the inside of the case and the outside of the case. Provided is the battery pack structure in which a foamable fireproof paint is applied inside the pressure regulator and, when a fire occurs inside the battery pack, the foamable fireproof paint is foamed in response to the fire to block air inflow from the outside of the case to the inside of the case, thereby extinguishing the fire generated inside the battery pack.

Description

배터리팩 구조{Battery pack structure}Battery pack structure

본 발명은 배터리팩 구조에 관한 것으로, 내부에 불이 발생하면 외부로부터 유입되던 공기를 차단해 소화하는 배터리팩 구조에 관한 것이다.The present invention relates to a battery pack structure, and to a battery pack structure that blocks and extinguishes air introduced from the outside when a fire occurs inside.

전기자동차에는 배터리팩이 장착된다. 배터리팩은 에너지 용량 증대를 위해 수냉식 냉각방식이 적용되고 있다. 배터리팩 내부에는 복수개의 배터리모듈이 장착되고, 배터리모듈에는 복수개의 배터리셀이 내장된다. 배터리셀과 배터리셀 사이에 냉각수가 흐르도록 배터리모듈에 냉각수가 공급되는 방식으로 수냉식 냉각방식이 적용된다.Electric vehicles are equipped with battery packs. The battery pack uses a water-cooled cooling method to increase energy capacity. A plurality of battery modules are mounted inside the battery pack, and a plurality of battery cells are embedded in the battery module. A water cooling method is applied in such a way that coolant is supplied to the battery module so that coolant flows between the battery cell and the battery cell.

냉각수가 배터리팩 외부로 누출되는 것을 방지하고, 외부 수증기에 의해 냉각수 조성이 변동되는 것을 방지할 수 있도록 배터리팩은 수밀구조를 이루게 된다. 배터리팩이 수밀구조를 이루게 됨에 따라, 배터리팩 내부에 불이 발생할 경우, 소화액을 배터리팩 내부로 주입할 수 없었다.The battery pack has a watertight structure to prevent the coolant from leaking to the outside of the battery pack and to prevent the composition of the coolant from being changed by external water vapor. As the battery pack has a watertight structure, when a fire occurs inside the battery pack, the extinguishing liquid cannot be injected into the battery pack.

대한민국 공개특허공보 제10-2018-0017695호(2018.02.21.)Korean Patent Application Publication No. 10-2018-0017695 (February 21, 2018)

이에 상기와 같은 점을 감안해 발명된 본 발명의 목적은, 배터리팩 내부에 발생된 불을 적극적으로 소화할 수 있는 배터리팩 구조를 제공하는 것이다.Accordingly, an object of the present invention in view of the above points is to provide a battery pack structure capable of actively extinguishing fire generated inside the battery pack.

위와 같은 목적을 달성하기 위해서 본 발명의 일실시예의 배터리팩 구조는, 복수개의 셀이 내장된 배터리모듈과, 복수개의 배터리모듈을 내장하는 케이스와, 케이스의 내부와 케이스의 외부 간에 공기가 순환하도록 케이스에 장착된 압력조정체를 포함하며, 압력조정체의 내부에 발포성 내화도료가 도포된다.In order to achieve the above object, the battery pack structure of an embodiment of the present invention includes a battery module in which a plurality of cells are embedded, a case in which a plurality of battery modules are embedded, and air circulates between the inside of the case and the outside of the case. It includes a pressure regulator mounted on the case, and a foamable fireproof paint is applied to the inside of the pressure regulator.

또한, 케이스의 내부는 복수개의 내부 격벽에 의해 구획되고, 배터리모듈은 복수개의 내부 격벽에 의해 구획된 공간들 각각에 배열되고, 내부 격벽에는 복수개의 내부 격벽에 의해 구획된 공간들 사이에 공기가 순환하도록 순환통로가 형성되고, 순환통로에 발포성 내화도료가 도포될 수 있다.In addition, the interior of the case is partitioned by a plurality of internal partition walls, and the battery module is arranged in each of the spaces partitioned by a plurality of internal partition walls, and air is allowed between the spaces partitioned by a plurality of inner partition walls. A circulation passage is formed to circulate, and a foamable fireproof paint may be applied to the circulation passage.

또한, 복수개의 배터리모듈은 부스바를 통해 연결되고, 부스바에는 임계 전류 인가시 파단되는 단락유도부가 형성되고, 단락유도부에 발포성 내화도료가 도포될 수 있다.In addition, a plurality of battery modules are connected through a bus bar, a short-circuit induction part that is broken when a critical current is applied to the bus-bar is formed, and a foamable fireproof paint may be applied to the short-circuit induction part.

또한, 단락유도부는, 제1 부스바의 단부와 제2 부스바의 단부에 좌우측 단부가 각각 체결된 단락유도체와, 제1 부스바의 단부, 제2 부스바의 단부 및 단락 유도체가 내장되는 하우징을 포함하며, 하우징 내측에 발포성 내화도료가 도포될 수 있다.In addition, the short-circuit induction part includes a short-circuit inducer having left and right ends respectively fastened to the end of the first busbar and the end of the second busbar, and the end of the first busbar, the end of the second busbar, and a housing in which the short-circuiting derivative is embedded It includes, and a foamable fireproof paint may be applied to the inside of the housing.

또한, 케이스에 압력조정체가 장착되는 순환홀이 형성되고, 압력조정체는, 순환홀에 고정되고, 상면 및 하면에 관통홀이 형성된 박스 형상의 바디와, 바디의 상면에 형성된 관통홀을 커버하도록 바디에 부착된 조정판을 포함하며, 바디 내부에 발포성 내화도료가 도포될 수 있다.In addition, a circulation hole in which the pressure regulator is mounted is formed in the case, and the pressure regulator is fixed to the circulation hole and covers a box-shaped body with through holes formed on the upper and lower surfaces, and a through hole formed on the upper surface of the body. It includes a control plate attached to the body, and a foamable fireproof paint may be applied to the inside of the body.

또한, 조정판에는 케이스의 내부와 케이스의 외부 간에 공기가 순환되는 순환홀이 형성되고, 조정판은 케이스 외부에서 케이스 내부로의 수분 이동을 차단할 수 있다.In addition, a circulation hole through which air is circulated between the inside of the case and the outside of the case is formed in the control plate, and the control plate may block the movement of moisture from the outside of the case to the inside of the case.

또한, 배터리모듈을 냉각하기 위해서 케이스에 설치되는 냉각라인을 더 포함할 수 있다.In addition, it may further include a cooling line installed in the case to cool the battery module.

위와 같은 목적을 달성하기 위해서 본 발명의 일실시예의 배터리팩 구조는, 복수개의 수냉식 배터리모듈이 내장된 케이스를 포함하며, 케이스의 내부와 케이스의 외부 간에 공기가 순환하도록 케이스에 순환홀이 형성되고, 케이스 내부에 불이 발생하면 공기의 순환을 차단하도록 순환홀에 발포성 내화도료가 구비된다.In order to achieve the above object, the battery pack structure of an embodiment of the present invention includes a case in which a plurality of water-cooled battery modules are embedded, and a circulation hole is formed in the case so that air circulates between the inside of the case and the outside of the case. , When fire occurs inside the case, a foamable fireproof paint is provided in the circulation hole to block the circulation of air.

또한, 순환홀에 케이스 내부 압력을 일정하게 유지하는 압력조정체가 장착되고, 압력조정체에 발포성 내화도료가 구비될 수 있다.In addition, a pressure regulator for maintaining a constant pressure inside the case may be mounted in the circulation hole, and a foamable fireproof paint may be provided in the pressure regulator.

또한, 복수개의 배터리모듈은 부스바를 통해 연결되고, 부스바에는 임계 전류 인가시 파단되는 단락유도부가 형성되고, 단락유도부에 발포성 내화도료가 도포될 수 있다.In addition, a plurality of battery modules are connected through a bus bar, a short-circuit induction part that is broken when a critical current is applied to the bus-bar is formed, and a foamable fireproof paint may be applied to the short-circuit induction part.

위와 같이 구성되는 본 발명의 일실시예의 배터리팩 구조에 따르면, 배터리팩 내부에 불이 발생할 경우, 발포성 내화도료가 발생된 불에 반응해 발포돼 케이스의 외부에서 케이스 내부로의 공기 유입을 차단하게 된다. 공기 유입이 차단되므로, 배터리팩 내부에 발생된 불은 소화된다. According to the structure of the battery pack according to an embodiment of the present invention configured as described above, when a fire occurs inside the battery pack, the foaming fireproof paint is foamed in response to the generated fire to block air inflow from the outside of the case to the inside of the case. do. Since air inflow is blocked, the fire generated inside the battery pack is extinguished.

특히, 산소 차단을 통해 적극적으로 불이 소화되므로, 화재 전파가 방지된다. 발포성 내화도료를 요소요소에 구비시킴으로써 구조적으로 소화를 유도할 수 있다.In particular, since fire is actively extinguished through oxygen blocking, fire propagation is prevented. It is possible to induce fire extinguishing structurally by providing a foamable fireproof paint to the urea.

또한, 발포성 내화도료는 건물에 널리 사용되므로, 확보가 용이하다.In addition, since the foaming fireproof paint is widely used in buildings, it is easy to secure.

또한, 발포성 내화도료 설치가 도포로 완료되므로, 적용이 간편하다.In addition, since the installation of the foaming fireproof paint is completed by application, it is easy to apply.

또한, 종래 사용되던 수냉식 배터리팩의 구조 변경 없이 적용이 가능하다.In addition, it can be applied without changing the structure of the conventional water-cooled battery pack.

도 1은 본 발명의 일실시예의 배터리팩 구조의 예시도이다.
도 2는 도 1의 배터리팩 구조 내부에 불 발생시의 상태도이다.
도 3은 도 1의 배터리팩 구조 내부에 발생된 불이 소화된 상태도이다.
도 4는 도 1의 배터리팩 구조에 설치된 부스바와 단락유도부의 예시도이다.
도 5는 도 4의 부스바와 단락유도부에 불이 발생되고 연소된 상태도이다.1 is an exemplary diagram of a structure of a battery pack according to an embodiment of the present invention.
FIG. 2 is a state diagram when a fire occurs inside the battery pack structure of FIG. 1.
3 is a diagram illustrating a state in which fire generated inside the battery pack structure of FIG. 1 is extinguished.
4 is an exemplary view of a bus bar and a short induction part installed in the battery pack structure of FIG. 1.
5 is a diagram illustrating a state in which fire is generated and burned in the bus bar and the short induction part of FIG. 4.

이하, 첨부된 도면을 참조로 본 발명의 일실시예의 배터리팩 구조를 설명한다.Hereinafter, a structure of a battery pack according to an embodiment of the present invention will be described with reference to the accompanying drawings.

도 1 내지 도 5에 도시된 바와 같이, 본 발명의 일실시예의 배터리팩 구조는, 복수개의 셀이 내장된 배터리모듈(100)과, 복수개의 배터리모듈(100)을 내장하는 케이스(200)와, 케이스(200)의 내부와 케이스(200)의 외부 간에 공기가 순환하도록 케이스(200)에 장착된 압력조정체(300)를 포함하며, 압력조정체(300)의 내부에 발포성 내화도료(P)가 도포된다. 압력조정체(300)에 의해 케이스(200) 내부 압력이 일정하게 유지된다.1 to 5, the battery pack structure of an embodiment of the present invention includes a battery module 100 in which a plurality of cells are embedded, a case 200 including a plurality of battery modules 100, and , It includes a pressure regulator 300 mounted on the case 200 so that air circulates between the inside of the case 200 and the outside of the case 200, and a foamable fireproof paint (P ) Is applied. The pressure inside the case 200 is kept constant by the pressure regulator 300.

셀은 파우치 형태의 하우징(520)에 젤리롤 형태의 전극 조립체가 내장된 형태로 제공된다. 셀은 배터리 관리 시스템에 의해 상태가 모니터링 된다. 배터리 관리 시스템(BMS; battery management system)은 셀의 충전 및 방전 상태, 열화도 및 열화에 따른 스웰링 발생 정도를 판단하고, 열화 및 스웰링 정도에 따라 작동 유무를 결정한다. The cell is provided in a form in which an electrode assembly in the form of a jelly roll is embedded in a pouch-shaped housing 520. The cell is health monitored by the battery management system. A battery management system (BMS) determines the state of charge and discharge of the cell, the degree of deterioration, and the degree of occurrence of swelling due to deterioration, and determines whether or not to operate according to the degree of deterioration and swelling.

배터리모듈(100)은 수냉식 냉각장치에 의해 냉각된다. 냉각장치는, 셀의 충전 및 방전시 발생되는 열을 배터리팩 외부로 배출한다. 배터리모듈(100) 내부에 복수개의 셀이 미리 정해진 상태로 배열된다. 냉각장치는 냉각수를 셀 사이에 유동시켜 셀의 열을 냉각수에 흡열시킨다. 냉각장치는 냉각수를 배터리모듈(100) 외부로 이동시킨 뒤, 발열시켜 배터리팩 외부로 배출한다.The battery module 100 is cooled by a water cooling type cooling device. The cooling device discharges heat generated during charging and discharging of the cell to the outside of the battery pack. A plurality of cells are arranged in a predetermined state inside the battery module 100. The cooling device absorbs heat from the cell by flowing cooling water between the cells. After moving the cooling water to the outside of the battery module 100, the cooling device generates heat and discharges it to the outside of the battery pack.

케이스(200)에는 냉각수가 유동하는 냉각라인이 형성된다. 냉각라인은 케이스(200) 외부표면에 위치될 수 있다. 케이스(200)의 외부 표면에는 냉각라인의 열 발산을 촉진하는 핀이 구비될 수 있다.A cooling line through which cooling water flows is formed in the case 200. The cooling line may be located on the outer surface of the case 200. Fins for promoting heat dissipation of the cooling line may be provided on the outer surface of the case 200.

케이스(200)에는 압력조정체(300)가 장착되는 순환홀(220)이 형성된다. 압력조정체(300)는, 순환홀(220)에 고정된다. 압력조정체(300)는, 상면 및 하면에 관통홀(311)이 형성된 박스 형상의 바디(310)와, 바디(310)의 상면에 형성된 관통홀(311)을 커버하도록 바디(310)에 부착된 조정판(320)을 포함한다. 바디(310) 내부에 발포성 내화도료(P)가 도포된다. 조정판(320)에는 케이스(200)의 내부와 케이스(200)의 외부 간에 공기가 순환되는 순환홀(220)이 형성된다. 조정판(320)은 케이스(200) 외부에서 케이스(200) 내부로의 수분 이동을 차단한다.The case 200 has a circulation hole 220 in which the pressure regulator 300 is mounted. The pressure regulator 300 is fixed to the circulation hole 220. The pressure regulator 300 is attached to the body 310 so as to cover the box-shaped body 310 with through holes 311 formed on the upper and lower surfaces and the through holes 311 formed on the upper surface of the body 310 It includes an adjustment plate (320). A foamable refractory paint (P) is applied inside the body 310. A circulation hole 220 through which air is circulated between the inside of the case 200 and the outside of the case 200 is formed in the adjustment plate 320. The adjustment plate 320 blocks the movement of moisture from the outside of the case 200 to the inside of the case 200.

케이스(200) 내부에 불이 발생하면, 압력조정체(300)에 도포된 발포성 내화도료(P)가 불에 반응해 발포하게 된다. 발포성 내화도료(P)는 발포될 경우 두께가 20배 이상 증대된다. 발포성 내화도료(P)는 발포됨으로써 탄화층을 형성하게 된다. 발포성 내화도료(P)가 발포돼 20배 이상의 두께가 되면 압력조정체(300)의 바디(310) 내부가 모두 탄화층으로 메워진다. 압력조정체(300)의 바디(310) 내부가 탄화층으로 메워지므로, 외부 공기가 케이스(200) 내부로 유입되지 않게 되고, 산소 부족에 의해 케이스(200) 내부에 발생된 불은 소화된다. When a fire occurs inside the case 200, the foamable refractory paint P applied to the pressure regulator 300 reacts to the fire and foams. When the foamable fireproof paint (P) is foamed, its thickness is increased by more than 20 times. The foamable refractory paint (P) is foamed to form a carbonized layer. When the foamable refractory paint (P) is foamed and has a thickness of 20 times or more, the inside of the body 310 of the pressure regulator 300 is all filled with a carbonized layer. Since the inside of the body 310 of the pressure regulator 300 is filled with a carbonized layer, external air does not flow into the case 200, and the fire generated inside the case 200 due to lack of oxygen is extinguished.

일예에 의하면, 케이스(200)의 내부는 복수개의 내부 격벽(210)에 의해 구획될 수 있다. 또한, 배터리모듈(100)은 복수개의 내부 격벽(210)에 의해 구획된 공간들 각각에 배열된다. 내부 격벽(210)에는 복수개의 내부 격벽(210)에 의해 구획된 공간들 사이에 공기가 순환하도록 순환통로(211)가 형성된다. 순환통로(211)에 발포성 내화도료(P)가 도포된다.According to an example, the interior of the case 200 may be partitioned by a plurality of internal partition walls 210. In addition, the battery module 100 is arranged in each of the spaces partitioned by a plurality of internal partition walls 210. A circulation passage 211 is formed in the inner partition wall 210 to circulate air between the spaces partitioned by the plurality of inner partition walls 210. A foamable fireproof paint (P) is applied to the circulation passage 211.

순환통로(211)에 발포성 내화도료(P)가 도포됨에 따라, 압력조정체(300)와 상대적으로 멀리 떨어진 배터리모듈(100)에 불이 발생한다 하더라도, 순환통로(211)에 도포된 발포성 내화도료(P)가 발생된 불에 의해 발포될 수 있다. 순환통로(211)에 도포된 발포성 내화도료(P)가 발포될 경우, 순환통로(211)는 탄화층에 의해 메워지게 된다. 순환통로(211)가 탄화층에 의해 메워지므로, 불이 발생된 특정 공간으로의 공기 유입이 차단된다. 산소 부족에 의해 특정 공간에 발생된 불은 소화된다. 특히, 특정 공간과 인접한 다른 공간들로 불이 확산되는 것이 방지된다.As the foamable refractory paint (P) is applied to the circulation passage 211, even if a fire occurs in the battery module 100 relatively far from the pressure regulator 300, the foamable refractory applied to the circulation passage 211 The paint (P) may be foamed by the generated fire. When the foamable refractory paint P applied to the circulation passage 211 is foamed, the circulation passage 211 is filled by the carbonized layer. Since the circulation passage 211 is filled by the carbonized layer, air inflow into a specific space where a fire is generated is blocked. Fires generated in specific spaces due to lack of oxygen are extinguished. In particular, fire is prevented from spreading to other spaces adjacent to a specific space.

다른 일예에 의하면, 내부 격벽(210)에 의해 구획된 각각의 공간에 위치된 복수개의 배터리모듈(100)은 부스바(400)를 통해 연결될 수 있다. 또한, 부스바(400)에는 임계 전류 인가시 파단되는 단락유도부(500)가 형성될 수 있다. 단락유도부(500)에 발포성 내화도료(P)가 도포된다. According to another example, a plurality of battery modules 100 positioned in each space partitioned by the inner partition wall 210 may be connected through the bus bar 400. In addition, a short induction part 500 that is broken when a critical current is applied may be formed in the bus bar 400. A foamable refractory paint (P) is applied to the short induction part 500.

단락유도부(500)는, 제1 부스바(400A)의 단부와 제2 부스바(400B)의 단부에 좌우측 단부가 각각 체결된 단락유도체(510)와, 제1 부스바(400A)의 단부, 제2 부스바(400B)의 단부 및 단락 유도체가 내장되는 하우징(520)을 포함한다. 하우징(520) 내측에 발포성 내화도료(P)가 도포된다.The short-circuit induction part 500 includes a short-circuit inducer 510 having left and right ends respectively fastened to an end of the first bus bar 400A and an end of the second bus bar 400B, and an end of the first bus bar 400A, It includes a housing 520 in which an end of the second busbar 400B and a short-circuit inductor are embedded. A foamable refractory paint (P) is applied to the inside of the housing 520.

단락유도체(510)는 길이방향을 따라 복수회 만곡된 형태로 제작된다. 만곡된 제1 부위와 제2 부위에 임계 전류가 인가되면, 피로열이 발생된다. 제1 만곡 부위아 제2 만곡 부위 사이에 해당하는 단락유도체(510)의 중심에는 피로열이 중첩된다. 중첩된 피로열에 의해 단락유도체(510)의 중심은 파단된다. 단락유도체(510) 파단시 열과 아크가 발생된다. 하우징(520) 내부에 도포된 발포성 내화도료(P)는 단락유도체(510) 파단시 발생된 열과 아크에 반응해 발포된다. 발포성 내화도료(P) 발포에 의해 단락유도체(510)의 하우징(520) 내부가 탄화층으로 메워지고, 단락유도체(510) 파단에 의해 발생된 열과 아크가 하우징(520) 밖으로 누출되는 것이 방지된다. The short-circuit inductor 510 is manufactured in a form curved a plurality of times along the length direction. When a critical current is applied to the curved first and second regions, fatigue heat is generated. Fatigue heat is superimposed at the center of the short-circuiting conductor 510 between the first and second curved portions. The center of the shorting conductor 510 is broken by the overlapped fatigue heat. When the short-circuit inductor 510 breaks, heat and arc are generated. The foamable refractory paint (P) applied to the inside of the housing 520 is foamed in response to the heat and arc generated when the shorting conductor 510 is broken. The inside of the housing 520 of the shorting inductor 510 is filled with a carbonized layer by foaming of the foamable refractory paint (P), and the heat and arc generated by the fracture of the shorting inductor 510 are prevented from leaking out of the housing 520 .

위와 같이 구성되는 본 발명의 일실시예의 배터리팩 구조에 따르면, 배터리팩 내부에 불이 발생할 경우, 발포성 내화도료(P)가 발생된 불에 반응해 발포돼 케이스(200)의 외부에서 케이스(200) 내부로의 공기 유입을 차단하게 된다. 공기 유입이 차단되므로, 배터리팩 내부에 발생된 불은 소화된다. According to the structure of the battery pack according to an embodiment of the present invention configured as described above, when a fire occurs inside the battery pack, the foamable refractory paint (P) is foamed in response to the generated fire, and the case 200 is formed from the outside of the case 200. ) It blocks the inflow of air into the interior. Since air inflow is blocked, the fire generated inside the battery pack is extinguished.

특히, 산소 차단을 통해 적극적으로 불이 소화되므로, 화재 전파가 방지된다. 발포성 내화도료(P)를 요소요소에 구비시킴으로써 구조적으로 소화를 유도할 수 있다. 아울러, 발포성 내화도료(P)는 건물에 널리 사용되므로, 확보가 용이하다. 발포성 내화도료(P) 설치가 도포로 완료되므로, 적용이 간편하다. 그리고, 종래 사용되던 수냉식 배터리팩의 구조 변경 없이 적용이 가능하다.In particular, since fire is actively extinguished through oxygen blocking, fire propagation is prevented. It is possible to induce fire extinguishing structurally by providing a foamable refractory paint (P) to the urea. In addition, since the foamable fireproof paint (P) is widely used in buildings, it is easy to secure. Since the installation of the foamable refractory paint (P) is completed by application, it is easy to apply. And, it can be applied without changing the structure of the conventional water-cooled battery pack.

100: 배터리모듈 200: 케이스
210: 내부 격벽 211: 순환통로
220: 순환홀 300: 압력조정체
310: 바디 311: 관통홀
320: 조정판 400: 부스바
400A: 제1 부스바 400B: 제2 부스바
500: 단락유도부 510: 단락유도체
520: 하우징 P: 발포성 내화도료100: battery module 200: case
210: inner bulkhead 211: circulation passage
220: circulation hole 300: pressure regulator
310: body 311: through hole
320: control plate 400: busbar
400A: 1st busbar 400B: 2nd busbar
500: short inductor 510: short inductor
520: housing P: foaming fireproof paint

Claims (10)

복수개의 셀이 내장된 배터리모듈;
복수개의 상기 배터리모듈을 내장하는 케이스;
상기 케이스의 내부와 상기 케이스의 외부 간에 공기가 순환하도록 상기 케이스에 장착된 압력조정체를 포함하며,
상기 압력조정체의 내부에 발포성 내화도료가 도포된 배터리팩 구조.
A battery module in which a plurality of cells are embedded;
A case including a plurality of the battery modules;
And a pressure regulator mounted on the case so that air circulates between the inside of the case and the outside of the case,
A battery pack structure in which a foamable fireproof paint is applied to the inside of the pressure regulator.
제1항에 있어서,
상기 케이스의 내부는 복수개의 내부 격벽에 의해 구획되고,
상기 배터리모듈은 상기 복수개의 내부 격벽에 의해 구획된 공간들 각각에 배열되고,
상기 내부 격벽에는 상기 복수개의 내부 격벽에 의해 구획된 공간들 사이에 공기가 순환하도록 순환통로가 형성되고,
상기 순환통로에 발포성 내화도료가 도포된 배터리팩 구조.
The method of claim 1,
The interior of the case is partitioned by a plurality of internal partition walls,
The battery module is arranged in each of the spaces partitioned by the plurality of internal partition walls,
A circulation passage is formed in the inner partition wall to circulate air between the spaces partitioned by the plurality of inner partition walls,
A battery pack structure in which a foamable fireproof paint is applied to the circulation passage.
제1항 또는 제2항에 있어서,
복수개의 상기 배터리모듈은 부스바를 통해 연결되고,
상기 부스바에는 임계 전류 인가시 파단되는 단락유도부가 형성되고,
상기 단락유도부에 발포성 내화도료가 도포된 배터리팩 구조.
The method according to claim 1 or 2,
The plurality of battery modules are connected through a bus bar,
The busbar is formed with a short-circuit inducing part that is broken when a critical current is applied,
A battery pack structure in which a foamable fireproof paint is applied to the short-circuit induction part.
제3항에 있어서,
상기 단락유도부는,
제1 부스바의 단부와 제2 부스바의 단부에 좌우측 단부가 각각 체결된 단락유도체;
상기 제1 부스바의 단부, 상기 제2 부스바의 단부 및 상기 단락 유도체가 내장되는 하우징을 포함하며,
상기 하우징 내측에 발포성 내화도료가 도포된 배터리팩 구조.
The method of claim 3,
The short-circuit induction part,
A shorting conductor having left and right ends respectively fastened to an end of the first busbar and an end of the second busbar;
An end portion of the first bus bar, an end portion of the second bus bar, and a housing in which the short-circuit derivative is embedded,
A battery pack structure in which a foamable fireproof paint is applied to the inside of the housing.
제1항에 있어서,
상기 케이스에 상기 압력조정체가 장착되는 순환홀이 형성되고,
상기 압력조정체는,
상기 순환홀에 고정되고, 상면 및 하면에 관통홀이 형성된 박스 형상의 바디;
상기 바디의 상면에 형성된 상기 관통홀을 커버하도록 상기 바디에 부착된 조정판을 포함하며,
상기 바디 내부에 발포성 내화도료가 도포된 배터리팩 구조.
The method of claim 1,
A circulation hole in which the pressure regulator is mounted is formed in the case,
The pressure regulator,
A box-shaped body fixed to the circulation hole and having through-holes formed on upper and lower surfaces;
It includes an adjustment plate attached to the body to cover the through hole formed on the upper surface of the body,
A battery pack structure in which a foamable fireproof paint is applied inside the body.
제5항에 있어서,
상기 조정판에는 상기 케이스의 내부와 상기 케이스의 외부 간에 공기가 순환되는 순환홀이 형성되고,
상기 조정판은 상기 케이스 외부에서 상기 케이스 내부로의 수분 이동을 차단하는 배터리팩 구조.
The method of claim 5,
A circulation hole through which air is circulated between the inside of the case and the outside of the case is formed in the control plate,
The control plate is a battery pack structure that blocks the movement of moisture from the outside of the case to the inside of the case.
제1항에 있어서,
상기 배터리모듈을 냉각하기 위해서 상기 케이스에 설치되는 냉각라인을 더 포함하는 배터리팩 구조.
The method of claim 1,
Battery pack structure further comprising a cooling line installed in the case to cool the battery module.
복수개의 수냉식 배터리모듈이 내장된 케이스를 포함하며,
상기 케이스의 내부와 상기 케이스의 외부 간에 공기가 순환하도록 상기 케이스에 순환홀이 형성되고,
상기 케이스 내부에 불이 발생하면 공기의 순환을 차단하도록 상기 순환홀에 발포성 내화도료가 구비된 배터리팩 구조.
It includes a case in which a plurality of water-cooled battery modules are embedded,
A circulation hole is formed in the case so that air circulates between the inside of the case and the outside of the case,
A battery pack structure in which a foamable fireproof paint is provided in the circulation hole to block air circulation when a fire occurs inside the case.
제8항에 있어서,
상기 순환홀에 상기 케이스 내부 압력을 일정하게 유지하는 압력조정체가 장착되고,
상기 압력조정체에 발포성 내화도료가 구비된 배터리팩 구조.
The method of claim 8,
A pressure regulator for maintaining a constant pressure inside the case is mounted in the circulation hole,
Battery pack structure provided with a foamable fireproof paint on the pressure regulator.
제8항에 있어서,
복수개의 상기 배터리모듈은 부스바를 통해 연결되고,
상기 부스바에는 임계 전류 인가시 파단되는 단락유도부가 형성되고,
상기 단락유도부에 발포성 내화도료가 도포된 배터리팩 구조.The method of claim 8,
The plurality of battery modules are connected through a bus bar,
The busbar is formed with a short-circuit inducing part that is broken when a critical current is applied,
A battery pack structure in which a foamable fireproof paint is applied to the short-circuit induction part.
KR1020190023168A 2019-02-27 2019-02-27 Battery pack structure KR20200104619A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102445541B1 (en) * 2022-03-07 2022-09-22 주식회사 서연이화 Battery module preventing thermal runway
KR20220168661A (en) 2021-06-17 2022-12-26 주식회사 인지디스플레이 Eco friendly fireproof coating composition and spray coating method, battery module coated with eco friendly fireproof coating composition

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180017695A (en) 2016-08-10 2018-02-21 주식회사 엘지화학 Battery pack improved in cooling structure

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180017695A (en) 2016-08-10 2018-02-21 주식회사 엘지화학 Battery pack improved in cooling structure

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20220168661A (en) 2021-06-17 2022-12-26 주식회사 인지디스플레이 Eco friendly fireproof coating composition and spray coating method, battery module coated with eco friendly fireproof coating composition
KR102445541B1 (en) * 2022-03-07 2022-09-22 주식회사 서연이화 Battery module preventing thermal runway

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