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WO2014178569A1 - Battery pack case for vehicle - Google Patents

Battery pack case for vehicle Download PDF

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Publication number
WO2014178569A1
WO2014178569A1 PCT/KR2014/003568 KR2014003568W WO2014178569A1 WO 2014178569 A1 WO2014178569 A1 WO 2014178569A1 KR 2014003568 W KR2014003568 W KR 2014003568W WO 2014178569 A1 WO2014178569 A1 WO 2014178569A1
Authority
WO
WIPO (PCT)
Prior art keywords
pack case
battery pack
case
battery
present
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/KR2014/003568
Other languages
French (fr)
Korean (ko)
Inventor
김성종
조재양
안순호
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LG Chem Ltd
Original Assignee
LG Chem Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020130063092A external-priority patent/KR101520902B1/en
Application filed by LG Chem Ltd filed Critical LG Chem Ltd
Priority to JP2015547878A priority Critical patent/JP6066386B2/en
Priority to US14/421,670 priority patent/US9865845B2/en
Publication of WO2014178569A1 publication Critical patent/WO2014178569A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—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
    • 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
    • H01M50/296—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by terminals of battery packs
    • 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
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/213—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/218—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
    • H01M50/22—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
    • H01M50/227—Organic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • 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 pack case, and more particularly to a battery pack case for a vehicle having a waterproof and drainage structure.
  • the secondary battery has high applicationability and high electrical energy characteristics such as high energy density according to the product group, and is not only a portable device but also an electric vehicle (EV) or a hybrid electric vehicle (HEV) driven by an electric driving source. It is applied universally.
  • the secondary battery is attracting attention as a new energy source for improving eco-friendliness and energy efficiency in that not only the primary advantage of drastically reducing the use of fossil fuels is generated but also no by-products of energy use are generated.
  • Types of secondary batteries currently widely used include lithium ion batteries, lithium polymer batteries, nickel cadmium batteries, nickel hydrogen batteries, nickel zinc batteries, and the like.
  • the operating voltage of the unit secondary battery cell is about 2.5V to 4.2V. Therefore, when a higher output voltage is required, a plurality of secondary battery cells may be connected in series to configure a battery pack.
  • the battery pack may be configured by connecting a plurality of secondary battery cells in parallel according to charge and discharge capacity required for the battery pack. Therefore, the number of secondary battery cells included in the battery pack may be variously set according to the required output voltage or charge and discharge capacity.
  • the present invention has been made in view of the prior art as described above, and an object thereof is to provide a pack case included in a battery pack for an automobile.
  • a battery pack case comprising a battery module assembly having four battery modules having a plurality of cylindrical secondary battery cells (hereinafter 'cell') is electrically connected in series, An upper pack case formed with a hole for exposing an electrode post electrically connected to the battery module assembly to the outside; A lower pack case having a lower frame and a side frame; An electrode terminal surrounding the externally exposed electrode post; A case sealing part interposed between the lower pack case and the upper pack case to prevent fluid from being introduced from the outside; And a terminal sealing part interposed between the electrode terminal and the upper pack case to prevent fluid from flowing from the outside, wherein the lower frame has a flow path formed in an area adjacent to the side frame.
  • the battery module assembly support portion (hereinafter referred to as 'support portion') having a step of a predetermined height from a frame is formed.
  • two support passages are formed in the support portion and connect the opposite flow paths passing through the center of the support portion, and the two drain passages vertically intersect.
  • the upper pack case and the lower pack case is made of a polymer material.
  • the polymer material polycarbonate (PolyCarbonate),
  • It may be an acrylonitrile-butadiene-styrene resin or a mixture of an acrylonitrile-butadiene-styrene resin (ABS) and a polycarbonate (PC) free of halogenated elements.
  • ABS acrylonitrile-butadiene-styrene resin
  • PC polycarbonate
  • the electrode terminal is brass.
  • the fluid present therein can be induced in the drainage path to be spatially separated from the battery module assembly included in the battery pack.
  • FIG. 1 is a perspective view illustrating a battery pack including a battery pack case according to an embodiment of the present invention.
  • FIG. 2 is an exploded perspective view of a battery pack including a pack case according to an embodiment of the present invention.
  • Figure 4 is a perspective view showing a state in which the upper pack case is mounted on the lower pack case according to an embodiment of the present invention.
  • FIG. 5 is an enlarged view of a cut surface of the battery pack illustrated in FIG. 1 taken along a line AA ′.
  • FIG. 7 is a plan view of a lower case according to an embodiment of the present invention.
  • FIG. 1 is a perspective view illustrating a battery pack 1 including battery pack cases 10 and 70 (hereinafter, 'pack case') according to an embodiment of the present invention.
  • the battery pack 1 illustrated in FIG. 1 is an automotive battery pack 1 that may be mounted on an automobile, a hybrid vehicle (HEV), an electric vehicle (EV), and the like.
  • HEV hybrid vehicle
  • EV electric vehicle
  • the size of the battery pack 1 is in accordance with the standard of the automotive standard battery. Therefore, the battery pack 1 may have a hexahedron shape as a whole.
  • the pack case 10, 70 may also have a size to comply with the standard of the automotive standard battery.
  • sizes of the battery pack 1 and the pack cases 10 and 70 are not limited to the above examples, and the length of the battery pack 1 and the pack cases 10 and 70 may vary depending on the embodiment.
  • FIG. 2 is an exploded perspective view of a battery pack 1 including pack cases 10 and 70 according to an embodiment of the present invention.
  • the battery pack 1 may have an operating voltage of 12V for an automobile.
  • the secondary battery cell 62 according to an embodiment of the present invention may have an operating voltage of 3V. Therefore, the four battery modules 60 may be connected in series to form the battery module assembly 50.
  • the battery module assembly 50 and the inner case 30 are embedded between the upper pack case 10 and the lower pack case 70 to constitute the battery pack 1.
  • the pack cases 10 and 70 according to an embodiment of the present invention include an upper pack case 10 and a lower pack case 70.
  • the upper pack case 10 is provided with a hole 11 to allow the electrode post 33 electrically connected to the battery module assembly to be exposed to the outside.
  • the externally exposed electrode post 33 is wrapped by the electrode terminal 12.
  • the material of the electrode terminal 12 is brass.
  • the lower pack case 70 has a lower frame 71 and a side frame 72.
  • a case sealing part 73 is interposed between the lower pack case 70 and the upper pack case 10 according to an embodiment of the present invention.
  • FIG 3 is a perspective view showing a state in which the battery module assembly 50 and the inner case 30 are mounted in the lower pack case 70 according to an embodiment of the present invention.
  • the terminal sealing part 13 is interposed between the electrode terminal 33 and the upper pack case 10 according to the exemplary embodiment of the present invention.
  • FIG 4 is a perspective view showing a state in which the upper pack case 10 is mounted on the lower pack case 70 according to an embodiment of the present invention.
  • terminal sealing part 13 is interposed around the hole 11 formed in the upper pack case 10 so that the electrode post 33 can be exposed to the outside.
  • FIG. 5 is an enlarged view of a cut surface of the battery pack 1 shown in FIG. 1 taken along the line AA ′.
  • case sealing part 73 serves to prevent fluid from flowing into the battery pack 1 from the outside.
  • terminal sealing part 13 serves to prevent fluid from flowing into the battery pack 1 from the outside through the hole 11.
  • the case sealing portion 73 and the terminal sealing portion 13 are made of silicon.
  • the case sealing portion 73 and the terminal sealing portion 13 is not limited to such a silicone material, and of course, may be replaced with a variety of known materials that can prevent the flow of fluid or moisture from the outside. .
  • the case sealing part 33 and the terminal sealing part 13 are combined with the upper pack case 10 and the lower pack case 70 through vibration welding.
  • the present invention is not limited by the above coupling method.
  • FIG. 6 is a cross-sectional view of the lower frame 70 obtained by cutting the battery pack 1 shown in FIG. 1 along a line AA ′.
  • the lower frame 71 has a flow path 74 formed in an area adjacent to the side frame 72.
  • the lower frame 71 is formed with a battery module assembly support unit 75 (hereinafter referred to as a support unit) having a step height of a predetermined height from the lower frame 71.
  • the pack case according to an embodiment of the present invention prevents fluid or moisture from penetrating from the outside, but a small amount may enter. Moreover, the electrolyte solution contained in a secondary battery cell may flow out. Therefore, it is necessary to collect the moisture or the fluid present therein to one side so as not to affect the battery module assembly 50.
  • FIG. 7 is a plan view of the lower case 70 according to an embodiment of the present invention.
  • FIG. 7 since it is a plan view of the lower case 70, an inner surface of the lower case 70, that is, an upper surface of the lower frame 71 is illustrated.
  • the support part 75 is provided with a drainage path 76 passing through the center of the support part 75 and connecting the opposing flow path 74.
  • the support part 75 may be formed with two drainage channels 76 connecting the opposite flow paths 74 passing through the center of the support part 75, wherein the two drainage channels 76 are vertical. Can cross.
  • a drainage path 76 passing through the center of the support part 75 may be formed and guided to flow toward the flow path 74.
  • the drainage channel 76 may have an inclination that increases as the center of the support 75 is closer to the center of the support 75.
  • the upper pack case 10 and the lower pack case 70 is made of a polymer material.
  • the polymer material may include polycarbonate, acrylonitrile-butadiene-styrene resin, or polycarbonate (PC) and acrylonitrile-butadiene-styrene resin containing no halogenated elements ( ABS).
  • the present invention it is possible to provide a stable and economical pack case including a plurality of secondary battery cells.
  • the plurality of secondary battery cells can be protected from the fluid flowing from the outside.
  • the fluid present therein may be induced in the drainage path so as to be spatially separated from the battery module assembly included in the battery pack.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

The present invention discloses a pack case included in a battery pack for a vehicle. According to the present invention, the stable and economical pack case comprising a plurality of secondary battery cells can be provided.

Description

자동차용 배터리 팩 케이스Car Battery Pack Case

본 발명은 배터리 팩 케이스에 관한 것으로서, 더욱 상세하게는 방수 및 배수 구조를 가진 자동차용 배터리 팩 케이스에 관한 것이다.The present invention relates to a battery pack case, and more particularly to a battery pack case for a vehicle having a waterproof and drainage structure.

본 출원은 2013년 4월 29일자로 출원된 한국 특허출원 번호 제10-2013-0047475호 및 2013년 5월 31일자로 출원된 한국 특허출원 번호 제10-2013-0063092호에 대한 우선권주장출원으로서, 해당 출원의 명세서 및 도면에 개시된 모든 내용은 인용에 의해 본 출원에 원용된다.This application is a priority application for Korean Patent Application No. 10-2013-0047475, filed April 29, 2013, and Korean Patent Application No. 10-2013-0063092, filed May 31, 2013. All the contents disclosed in the specification and drawings of this application are incorporated in this application by reference.

제품 군에 따른 적용 용이성이 높고, 높은 에너지 밀도 등의 전기적 특성을 가지는 이차전지는 휴대용 기기뿐만 아니라 전기적 구동원에 의하여 구동하는 전기차량(EV, Electric Vehicle) 또는 하이브리드 차량(HEV, Hybrid Electric Vehicle) 등에 보편적으로 응용되고 있다. 이러한 이차전지는 화석 연료의 사용을 획기적으로 감소시킬 수 있다는 일차적인 장점뿐만 아니라 에너지의 사용에 따른 부산물이 전혀 발생되지 않는다는 점에서 친환경 및 에너지 효율성 제고를 위한 새로운 에너지원으로 주목 받고 있다.The secondary battery has high applicationability and high electrical energy characteristics such as high energy density according to the product group, and is not only a portable device but also an electric vehicle (EV) or a hybrid electric vehicle (HEV) driven by an electric driving source. It is applied universally. The secondary battery is attracting attention as a new energy source for improving eco-friendliness and energy efficiency in that not only the primary advantage of drastically reducing the use of fossil fuels is generated but also no by-products of energy use are generated.

현재 널리 사용되는 이차전지의 종류에는 리튬 이온 전지, 리튬 폴리머 전지, 니켈 카드늄 전지, 니켈 수소 전지, 니켈 아연 전지 등이 있다. 이러한 단위 이차전지 셀의 작동 전압은 약 2.5V~4.2V이다. 따라서, 이보다 더 높은 출력 전압이 요구될 경우, 다수의 이차전지 셀을 직렬로 연결하여 배터리 팩을 구성하기도 한다. 또한, 배터리 팩에 요구되는 충방전 용량에 따라 다수의 이차전지 셀을 병렬 연결하여 배터리 팩을 구성하기도 한다. 따라서, 상기 배터리 팩에 포함되는 이차전지 셀의 개수는 요구되는 출력 전압 또는 충방용량에 따라 다양하게 설정될 수 있다.Types of secondary batteries currently widely used include lithium ion batteries, lithium polymer batteries, nickel cadmium batteries, nickel hydrogen batteries, nickel zinc batteries, and the like. The operating voltage of the unit secondary battery cell is about 2.5V to 4.2V. Therefore, when a higher output voltage is required, a plurality of secondary battery cells may be connected in series to configure a battery pack. In addition, the battery pack may be configured by connecting a plurality of secondary battery cells in parallel according to charge and discharge capacity required for the battery pack. Therefore, the number of secondary battery cells included in the battery pack may be variously set according to the required output voltage or charge and discharge capacity.

한편 다수의 이차전지 셀을 직렬/병렬로 연결하여 배터리 팩을 구성할 경우, 배터리 팩에 포함된 이차전지 셀들은 전기적 및 기계적으로 견고하게 연결될 필요가 있다. 따라서, 이와 같이 이차 전지 셀들의 연결이 견고하게 이루어질 수 있도록 하는 안정적이고 경제적인 배터리 팩 케이스 디자인이 요구된다.Meanwhile, when a plurality of secondary battery cells are connected in series / parallel to configure a battery pack, the secondary battery cells included in the battery pack need to be electrically and mechanically connected. Therefore, there is a need for a stable and economical battery pack case design that enables the connection of secondary battery cells to be securely made.

본 발명은 상기와 같은 종래 기술을 인식하여 안출된 것으로서, 자동차용 배터리 팩에 포함되는 팩 케이스를 제공하는데 그 목적이 있다.The present invention has been made in view of the prior art as described above, and an object thereof is to provide a pack case included in a battery pack for an automobile.

상기 기술적 과제를 달성하기 위한 본 발명에 따른 배터리 팩 케이스는, 다수의 원통형 이차전지 셀(이하 '셀')를 가진 4개의 배터리 모듈이 전기적으로 직렬 연결된 배터리 모듈 집합체를 포함하는 배터리 팩 케이스로서, 상기 배터리 모듈 집합체와 전기적으로 연결된 전극 포스트가 외부로 노출 될 수 있도록 하는 구멍이 형성된 상부 팩 케이스; 하부 프레임, 측면 프레임을 가진 하부 팩 케이스; 상기 외부로 노출된 전극 포스트를 감싸는 전극 터미널; 상기 하부 팩 케이스 및 상기 상부 팩 케이스 사이에 개재되어 외부로부터 유체가 유입되는 것을 방지하는 케이스 실링부; 및 상기 전극 터미널 및 상기 상부 팩 케이스 사이에 개재되어 외부로부터 유체가 유입되는 것을 방지하는 터미널 실링부;를 포함하며, 상기 하부 프레임에는, 상기 측면 프레임과 인접한 영역에 유로가 형성되어 있으며, 상기 하부 프레임으로부터 미리 설정된 높이의 단차를 가진 상기 배터리 모듈 집합체 지지부(이하 '지지부')가 형성되어 있다.The battery pack case according to the present invention for achieving the above technical problem, a battery pack case comprising a battery module assembly having four battery modules having a plurality of cylindrical secondary battery cells (hereinafter 'cell') is electrically connected in series, An upper pack case formed with a hole for exposing an electrode post electrically connected to the battery module assembly to the outside; A lower pack case having a lower frame and a side frame; An electrode terminal surrounding the externally exposed electrode post; A case sealing part interposed between the lower pack case and the upper pack case to prevent fluid from being introduced from the outside; And a terminal sealing part interposed between the electrode terminal and the upper pack case to prevent fluid from flowing from the outside, wherein the lower frame has a flow path formed in an area adjacent to the side frame. The battery module assembly support portion (hereinafter referred to as 'support portion') having a step of a predetermined height from a frame is formed.

본 발명의 일 실시예에 따르면, 상기 지지부에는 상기 지지부의 중심을 지나며 상기 마주보는 유로를 연결하는 배수로가 형성되어 있다.According to an embodiment of the present invention, the support portion is formed with a drain passage passing the center of the support portion and connecting the opposite flow path.

본 발명의 일 실시예에 따르면, 상기 지지부에는 상기 지지부의 중심을 지나며 상기 마주보는 유로를 연결하는 두 개의 배수로가 형성되어 있으며, 상기 두 개의 배수로는 수직으로 교차한다.According to an embodiment of the present invention, two support passages are formed in the support portion and connect the opposite flow paths passing through the center of the support portion, and the two drain passages vertically intersect.

바람직하게, 상기 배수로는 상기 지지부의 중심에 가까울 수록 높아지는 경사를 가진다.Preferably, the drainage channel has an inclination that increases as it gets closer to the center of the support part.

본 발명의 일 실시예에 따르면, 상기 상부 팩 케이스 및 상기 하부 팩 케이스는 고분자 물질로 이루어 진다. 상기 고분자 물질은, 폴리카보네이트(PolyCarbonate),According to one embodiment of the invention, the upper pack case and the lower pack case is made of a polymer material. The polymer material, polycarbonate (PolyCarbonate),

아크릴로니트릴-부타디엔-스타이렌 수지(Aacrylonitrile-Butadiene-Styrene resin) 또는 할로겐족 원소가 포함되지 않은 폴리카보네이트(PC)와 아크릴로니트릴-부타디엔-스타이렌 수지(ABS)의 혼합물이 될 수 있다.It may be an acrylonitrile-butadiene-styrene resin or a mixture of an acrylonitrile-butadiene-styrene resin (ABS) and a polycarbonate (PC) free of halogenated elements.

본 발명의 일 실시예에 따르면, 상기 전극 터미널은 황동이다.According to one embodiment of the invention, the electrode terminal is brass.

본 발명의 일 실시예에 따르면, 상기 케이스 실링부 및 터미널 실링부는 실리콘 재질이다. 이때, 상기 케이스 실링부 및 터미널 실링부는 진동 융착을 통해서 상기 상부 팩 케이스 및 하부 팩 케이스와 결합될 수 있다. According to an embodiment of the present invention, the case sealing portion and the terminal sealing portion are made of silicon. In this case, the case sealing part and the terminal sealing part may be combined with the upper pack case and the lower pack case through vibration welding.

본 발명의 일 측면에 따르면, 다수의 이차전지 셀을 포함하는 안정적이고 경제적인 팩 케이스를 제공할 수 있다.According to an aspect of the present invention, it is possible to provide a stable and economical pack case including a plurality of secondary battery cells.

본 발명의 다른 측면에 따르면, 다수의 이차전지 셀을 외부에서 유입되는 유체로부터 보호할 수 있다.According to another aspect of the present invention, a plurality of secondary battery cells can be protected from the fluid flowing from the outside.

본 발명의 또 다른 측면에 따르면, 내부에 존재하는 유체를 배수로에 유도하여 배터리 팩에 포함된 배터리 모듈 집합체와 공간적으로 분리할 수 있다. According to another aspect of the present invention, the fluid present therein can be induced in the drainage path to be spatially separated from the battery module assembly included in the battery pack.

본 명세서에 첨부되는 다음의 도면들은 본 발명의 바람직한 실시예를 예시하는 것이며, 후술하는 발명의 상세한 설명과 함께 본 발명의 기술사상을 더욱 이해시키는 역할을 하는 것이므로, 본 발명은 그러한 도면에 기재된 사항에만 한정되어 해석되어서는 아니 된다.The following drawings attached to this specification are illustrative of preferred embodiments of the present invention, and together with the detailed description of the invention to serve to further understand the technical spirit of the present invention, the present invention is a matter described in such drawings It should not be construed as limited to.

도 1은 본 발명의 일 실시예에 따른 배터리 팩 케이스를 포함하는 배터리 팩을 나타내는 사시도이다.1 is a perspective view illustrating a battery pack including a battery pack case according to an embodiment of the present invention.

도 2는 본 발명의 일 실시예에 따른 팩 케이스를 포함하는 배터리 팩의 분해 사시도이다.2 is an exploded perspective view of a battery pack including a pack case according to an embodiment of the present invention.

도 3은 본 발명의 일 실시예에 따른 하부 팩 케이스 내부에 배터리 모듈 집합체 및 내부 케이스가 장착된 모습을 나타낸 사시도이다.3 is a perspective view showing a state in which the battery module assembly and the inner case is mounted in the lower pack case according to an embodiment of the present invention.

도 4는 본 발명의 일 실시예에 따른 하부 팩 케이스 위에 상부 팩 케이스가 장착된 모습을 나타낸 사시도이다.Figure 4 is a perspective view showing a state in which the upper pack case is mounted on the lower pack case according to an embodiment of the present invention.

도 5는 도 1에 도시된 배터리 팩을 A-A' 절단선을 따라 절단한 절단면의 확대도이다.FIG. 5 is an enlarged view of a cut surface of the battery pack illustrated in FIG. 1 taken along a line AA ′.

도 6은 도 1에 도시된 배터리 팩을 A-A' 절단선을 따라 절단한 하부 프레임의 절단면도이다.6 is a cross-sectional view of the lower frame obtained by cutting the battery pack illustrated in FIG. 1 along a line AA ′.

도 7은 본 발명의 일 실시예에 따른 하부 케이스의 평면도이다.7 is a plan view of a lower case according to an embodiment of the present invention.

이하, 첨부된 도면을 참조하여 본 발명의 바람직한 실시예를 상세히 설명하기로 한다. 이에 앞서, 본 명세서 및 청구범위에 사용된 용어나 단어는 통상적이거나 사전적인 의미로 한정해서 해석되어서는 아니되며, 발명자는 그 자신의 발명을 가장 최선의 방법으로 설명하기 위해 용어의 개념을 적절하게 정의할 수 있다는 원칙에 입각하여 본 발명의 기술적 사상에 부합하는 의미와 개념으로 해석되어야만 한다. 따라서, 본 명세서에 기재된 실시예와 도면에 도시된 구성은 본 발명의 가장 바람직한 일 실시예에 불과할 뿐이고 본 발명의 기술적 사상을 모두 대변하는 것은 아니므로, 본 출원시점에 있어서 이들을 대체할 수 있는 다양한 균등물과 변형 예들이 있을 수 있음을 이해하여야 한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the specification and claims should not be construed as having a conventional or dictionary meaning, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention. Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

도 1은 본 발명의 일 실시예에 따른 배터리 팩 케이스(10, 70, 이하 ' 팩 케이스')를 포함하는 배터리 팩(1)을 나타내는 사시도이다.1 is a perspective view illustrating a battery pack 1 including battery pack cases 10 and 70 (hereinafter, 'pack case') according to an embodiment of the present invention.

도 1에 도시된 배터리 팩(1)은 자동차, 하이브리드차(HEV), 전기차(EV) 등에 장착될 수 있는 자동차용 배터리 팩(1)이다.The battery pack 1 illustrated in FIG. 1 is an automotive battery pack 1 that may be mounted on an automobile, a hybrid vehicle (HEV), an electric vehicle (EV), and the like.

바람직하게, 상기 배터리 팩(1)의 크기는 자동차용 표준 배터리의 규격을 따른다. 따라서, 상기 배터리 팩(1)은 전체적으로 육면체의 형상을 가질 수 있다.Preferably, the size of the battery pack 1 is in accordance with the standard of the automotive standard battery. Therefore, the battery pack 1 may have a hexahedron shape as a whole.

또한 바람직하게, 상기 팩 케이스(10, 70) 역시 자동차용 표준 배터리의 규격을 따르기 위한 크기를 가질 수 있다. 그러나, 상기 배터리 팩(1) 및 팩 케이스(10, 70)의 크기는 상기 예시에 제한되지 않으며 실시예에 따라 가로, 세로, 높이의 길이는 다양할 수 있다.Also, preferably, the pack case 10, 70 may also have a size to comply with the standard of the automotive standard battery. However, sizes of the battery pack 1 and the pack cases 10 and 70 are not limited to the above examples, and the length of the battery pack 1 and the pack cases 10 and 70 may vary depending on the embodiment.

도 2는 본 발명의 일 실시예에 따른 팩 케이스(10, 70)을 포함하는 배터리 팩(1)의 분해 사시도이다.2 is an exploded perspective view of a battery pack 1 including pack cases 10 and 70 according to an embodiment of the present invention.

본 발명의 일 실시예에 따른 배터리 팩(1)은 자동차용으로서 12V의 작동 전압을 가질 수 있다. 그리고, 본 발명의 일 실시예에 따른 이차전지 셀(62)은 3V의 작동 전압을 가질 수 있다. 따라서, 4개의 배터리 모듈(60)은 직렬로 연결되어 배터리 모듈 집합체(50)를 구성할 수 있다.The battery pack 1 according to an embodiment of the present invention may have an operating voltage of 12V for an automobile. In addition, the secondary battery cell 62 according to an embodiment of the present invention may have an operating voltage of 3V. Therefore, the four battery modules 60 may be connected in series to form the battery module assembly 50.

그리고, 상기 배터리 모듈 집합체(50)와 내부 케이스(30)가 상부 팩 케이스(10)와 하부 팩 케이스(70) 사이에 내장되어, 배터리 팩(1)을 구성한다.In addition, the battery module assembly 50 and the inner case 30 are embedded between the upper pack case 10 and the lower pack case 70 to constitute the battery pack 1.

이하 상기 배터리 팩(1)에 포함되는 팩 케이스(10, 70)에 대해서 설명하도록 한다.Hereinafter, the pack cases 10 and 70 included in the battery pack 1 will be described.

도 2를 참조하면, 본 발명의 일 실시예에 따른 팩 케이스(10, 70)는 상부 팩 케이스(10) 및 하부 팩 케이스(70)를 포함한다.2, the pack cases 10 and 70 according to an embodiment of the present invention include an upper pack case 10 and a lower pack case 70.

상기 상부 팩 케이스(10)에는 상기 배터리 모듈 집합체와 전기적으로 연결된 전극 포스트(33)가 외부로 노출될 수 있도록 하는 구멍(11)이 형성되어 있다. 상기 외부로 노출된 전극 포스트(33)는 전극 터미널(12)에 의해서 감싸진다. 본 발명의 일 실시예에 따르면, 상기 전극 터미널(12)의 재질은 황동이다.The upper pack case 10 is provided with a hole 11 to allow the electrode post 33 electrically connected to the battery module assembly to be exposed to the outside. The externally exposed electrode post 33 is wrapped by the electrode terminal 12. According to one embodiment of the invention, the material of the electrode terminal 12 is brass.

상기 하부 팩 케이스(70)는 하부 프레임(71) 및 측면 프레임(72)을 가진다.The lower pack case 70 has a lower frame 71 and a side frame 72.

본 발명의 일 실시예에 따른 상기 하부 팩 케이스(70) 및 상기 상부 팩 케이스(10) 사이에는 케이스 실링부(73)가 개재된다.A case sealing part 73 is interposed between the lower pack case 70 and the upper pack case 10 according to an embodiment of the present invention.

도 3은 본 발명의 일 실시예에 따른 하부 팩 케이스(70) 내부에 배터리 모듈 집합체(50) 및 내부 케이스(30)가 장착된 모습을 나타낸 사시도이다.3 is a perspective view showing a state in which the battery module assembly 50 and the inner case 30 are mounted in the lower pack case 70 according to an embodiment of the present invention.

본 발명의 일 실시예에 따른 상기 전극 터미널(33) 및 상기 상부 팩 케이스(10) 사이에는 터미널 실링부(13)가 개재된다.The terminal sealing part 13 is interposed between the electrode terminal 33 and the upper pack case 10 according to the exemplary embodiment of the present invention.

도 4는 본 발명의 일 실시예에 따른 하부 팩 케이스(70) 위에 상부 팩 케이스(10)가 장착된 모습을 나타낸 사시도이다.4 is a perspective view showing a state in which the upper pack case 10 is mounted on the lower pack case 70 according to an embodiment of the present invention.

도 4를 참조하면, 상기 상부 팩 케이스(10)에 전극 포스트(33)가 외부로 노출 될 수 있도록 형성된 구멍(11) 주위에 터미널 실링부(13)가 개재된 것을 확인할 수 있다.Referring to FIG. 4, it can be seen that the terminal sealing part 13 is interposed around the hole 11 formed in the upper pack case 10 so that the electrode post 33 can be exposed to the outside.

도 5는 도 1에 도시된 배터리 팩(1)을 A-A' 절단선을 따라 절단한 절단면의 확대도이다.FIG. 5 is an enlarged view of a cut surface of the battery pack 1 shown in FIG. 1 taken along the line AA ′.

도 5를 참조하면, 본 발명의 일 실시예에 따른 상부 팩 케이스(10)와 하부 팩 케이스(70)가 접한 부분을 중심으로 절단된 모습을 확인할 수 있다.Referring to FIG. 5, it can be seen that the upper pack case 10 and the lower pack case 70 are cut in contact with the contact portion of the present invention.

여기서, 상기 케이스 실링부(73)는 외부로부터 유체가 배터리 팩(1) 내부로 유입되는 것을 방지하는 역할을 한다. 그리고, 상기 터미널 실링부(13)는 외부로부터 유체가 상기 구멍(11)을 통해서 배터리 팩(1) 내부로 유입되는 것을 방지하는 역할을 한다.Here, the case sealing part 73 serves to prevent fluid from flowing into the battery pack 1 from the outside. In addition, the terminal sealing part 13 serves to prevent fluid from flowing into the battery pack 1 from the outside through the hole 11.

본 발명의 일 실시예에 따르면, 상기 케이스 실링부(73) 및 터미널 실링부(13)의 재질은 실리콘이다. 그러나, 상기 케이스 실링부(73) 및 터미널 실링부(13)는 이러한 실리콘 재질에 한정되지 않으며, 외부로부터 유체 또는 습기가 유입되는 것을 방지할 수 있는 공지의 다양한 재질로 대체될 수 있음은 물론이다.According to an embodiment of the present invention, the case sealing portion 73 and the terminal sealing portion 13 are made of silicon. However, the case sealing portion 73 and the terminal sealing portion 13 is not limited to such a silicone material, and of course, may be replaced with a variety of known materials that can prevent the flow of fluid or moisture from the outside. .

본 발명의 일 실시예에 따르면, 상기 케이스 실링부(33) 및 터미널 실링부(13)는 진동 융착을 통해서 상기 상부 팩 케이스(10) 및 하부 팩 케이스(70)와 결합된다. 그러나 본 발명이 상기 결합 방식에 의해 제한되는 것은 아니다.According to an embodiment of the present invention, the case sealing part 33 and the terminal sealing part 13 are combined with the upper pack case 10 and the lower pack case 70 through vibration welding. However, the present invention is not limited by the above coupling method.

도 6은 도 1에 도시된 배터리 팩(1)을 A-A' 절단선을 따라 절단한 하부 프레임(70)의 절단면도이다. FIG. 6 is a cross-sectional view of the lower frame 70 obtained by cutting the battery pack 1 shown in FIG. 1 along a line AA ′.

도 6을 참조하면, 본 발명의 일 실시예에 따른 상기 하부 프레임(71)에는 상기 측면 프레임(72)과 인접한 영역에 유로(74)가 형성되어 있다. 그리고, 상기 하부 프레임(71)에는 상기 하부 프레임(71)으로부터 미리 설정된 높이의 단차를 가진 배터리 모듈 집합체 지지부(75, 이하 '지지부')가 형성되어 있다.Referring to FIG. 6, the lower frame 71 according to the exemplary embodiment of the present invention has a flow path 74 formed in an area adjacent to the side frame 72. In addition, the lower frame 71 is formed with a battery module assembly support unit 75 (hereinafter referred to as a support unit) having a step height of a predetermined height from the lower frame 71.

본 발명의 일 실시예에 따른 팩 케이스는 외부로부터 유체나 습기가 침투하는 것을 방지하지만, 적은 양이 들어올 가능성이 있다. 또한, 이차전지 셀에 포함된 전해액이 흘러나올 가능성도 있다. 따라서, 내부에 존재하는 습기 또는 유체를 한 쪽으로 모아서, 상기 배터리 모듈 집합체(50)에 영향을 미치지 않게 할 필요가 있다.The pack case according to an embodiment of the present invention prevents fluid or moisture from penetrating from the outside, but a small amount may enter. Moreover, the electrolyte solution contained in a secondary battery cell may flow out. Therefore, it is necessary to collect the moisture or the fluid present therein to one side so as not to affect the battery module assembly 50.

상기 지지부(75)는 미리 설정된 높이의 단차를 가져서, 유체나 습기가 아래로 모이게 유도할 수 있다. 따라서, 배터리 팩(1) 내부에 존재하는 유체는 상기 유로(74)에 모이게 된다. 상기 유로(74)의 폭은 다양하게 설계될 수 있으며, 상기 지지부(75)의 높이 역시 다양하게 설계될 수 있다.The support portion 75 may have a step of a predetermined height, thereby inducing fluid or moisture to collect downward. Therefore, the fluid present in the battery pack 1 is collected in the flow path (74). The width of the flow path 74 may be variously designed, and the height of the support 75 may also be variously designed.

도 7은 본 발명의 일 실시예에 따른 하부 케이스(70)의 평면도이다.7 is a plan view of the lower case 70 according to an embodiment of the present invention.

도 7을 참조하면, 상기 하부 케이스(70)의 평면도이기 때문에, 상기 하부 케이스(70)의 내부 즉, 상기 하부 프레임(71)의 상단면이 도시되어 있다.Referring to FIG. 7, since it is a plan view of the lower case 70, an inner surface of the lower case 70, that is, an upper surface of the lower frame 71 is illustrated.

본 발명의 일 실시예에 따르면, 상기 지지부(75)에는 상기 지지부(75)의 중심을 지나며, 상기 마주보는 유로(74)를 연결하는 배수로(76)가 형성된다.According to an embodiment of the present invention, the support part 75 is provided with a drainage path 76 passing through the center of the support part 75 and connecting the opposing flow path 74.

바람직하게, 상기 지지부(75)에는, 상기 지지부(75)의 중심을 지나며 상기 마주보는 유로(74)를 연결하는 두 개의 배수로(76)가 형성될 수 있으며, 상기 두 개의 배수로(76)는 수직으로 교차할 수 있다.Preferably, the support part 75 may be formed with two drainage channels 76 connecting the opposite flow paths 74 passing through the center of the support part 75, wherein the two drainage channels 76 are vertical. Can cross.

상기 배터리 모듈 집합체(50)에서 유출된 전해액 등의 유체는 반드시 상기 배터리 모듈 집합체(50)의 외부면을 따라 흐른다는 보장이 없다. 일 예로, 상기 배터리 모듈 집합체(50) 내부에서 전해액 등의 유체가 흘러나올 수 있다. 따라서, 상기 지지부(75)의 중심을 지나는 배수로(76)를 형성하여 상기 유로(74)쪽으로 흐르도록 유도할 수 있다. 이를 위해, 상기 배수로(76)는 상기 지지부(75)의 중심에 가까울 수록 높아지는 경사를 가질 수 있다.There is no guarantee that fluid such as electrolyte flowing out of the battery module assembly 50 necessarily flows along the outer surface of the battery module assembly 50. For example, a fluid such as an electrolyte may flow out of the battery module assembly 50. Therefore, a drainage path 76 passing through the center of the support part 75 may be formed and guided to flow toward the flow path 74. To this end, the drainage channel 76 may have an inclination that increases as the center of the support 75 is closer to the center of the support 75.

본 발명의 일 실시예에 따르면, 상기 상부 팩 케이스(10) 및 상기 하부 팩 케이스(70)는 고분자 물질로 이루어 진다. 상기 고분자 물질은 폴리카보네이트(PolyCarbonate), 아크릴로니트릴-부타디엔-스타이렌 수지(Aacrylonitrile-Butadiene-Styrene resin) 또는 할로겐족 원소가 포함되지 않은 폴리카보네이트(PC)와 아크릴로니트릴-부타디엔-스타이렌 수지(ABS)의 혼합물이 될 수 있다.According to one embodiment of the invention, the upper pack case 10 and the lower pack case 70 is made of a polymer material. The polymer material may include polycarbonate, acrylonitrile-butadiene-styrene resin, or polycarbonate (PC) and acrylonitrile-butadiene-styrene resin containing no halogenated elements ( ABS).

본 발명에 따르면, 다수의 이차전지 셀을 포함하는 안정적이고 경제적인 팩 케이스를 제공할 수 있다. 또한, 다수의 이차전지 셀을 외부에서 유입되는 유체로부터 보호할 수 있다. 나아가, 내부에 존재하는 유체를 배수로에 유도하여 배터리 팩에 포함된 배터리 모듈 집합체와 공간적으로 분리할 수 있다. According to the present invention, it is possible to provide a stable and economical pack case including a plurality of secondary battery cells. In addition, the plurality of secondary battery cells can be protected from the fluid flowing from the outside. Furthermore, the fluid present therein may be induced in the drainage path so as to be spatially separated from the battery module assembly included in the battery pack.

이상에서 본 발명은 비록 한정된 실시예와 도면에 의해 설명되었으나, 본 발명은 이것에 의해 한정되지 않으며 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에 의해 본 발명의 기술사상과 아래에 기재될 특허청구범위의 균등범위 내에서 다양한 수정 및 변형이 가능함은 물론이다.Although the present invention has been described above by means of limited embodiments and drawings, the present invention is not limited thereto and will be described below by the person skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of the claims.

Claims (11)

다수의 원통형 이차전지 셀(이하 '셀')를 가진 4개의 배터리 모듈이 전기적으로 직렬 연결된 배터리 모듈 집합체를 포함하는 배터리 팩 케이스에 있어서,A battery pack case comprising four battery modules having a plurality of cylindrical secondary battery cells (hereinafter, 'cells') including a battery module assembly electrically connected in series, 상기 배터리 모듈 집합체와 전기적으로 연결된 전극 포스트가 외부로 노출 될 수 있도록 하는 구멍이 형성된 상부 팩 케이스;An upper pack case formed with a hole for exposing an electrode post electrically connected to the battery module assembly to the outside; 하부 프레임, 측면 프레임을 가진 하부 팩 케이스;A bottom pack case having a bottom frame and side frames; 상기 외부로 노출된 전극 포스트를 감싸는 전극 터미널; An electrode terminal surrounding the externally exposed electrode post; 상기 하부 팩 케이스 및 상기 상부 팩 케이스 사이에 개재되어 외부로부터 유체가 유입되는 것을 방지하는 케이스 실링부; 및A case sealing part interposed between the lower pack case and the upper pack case to prevent fluid from being introduced from the outside; And 상기 전극 터미널 및 상기 상부 팩 케이스 사이에 개재되어 외부로부터 유체가 유입되는 것을 방지하는 터미널 실링부;를 포함하며And a terminal sealing part interposed between the electrode terminal and the upper pack case to prevent fluid from being introduced from the outside. 상기 하부 프레임에는, 상기 측면 프레임과 인접한 영역에 유로가 형성되어 있으며, 상기 하부 프레임으로부터 미리 설정된 높이의 단차를 가진 상기 배터리 모듈 집합체 지지부(이하 '지지부')가 형성되어 있는 것을 특징으로 하는 배터리 팩 케이스.In the lower frame, a flow path is formed in an area adjacent to the side frame, and the battery pack assembly support portion (hereinafter referred to as a 'support portion') having a step of a predetermined height from the lower frame is formed. case. 제1항에 있어서,The method of claim 1, 상기 지지부에는, 상기 지지부의 중심을 지나며 상기 마주보는 유로를 연결하는 배수로가 형성되어 있는 것을 특징으로 하는 배터리 팩 케이스.The support part, characterized in that the battery pack case characterized in that the drain passage for connecting the facing flow path passing through the center of the support. 제1항에 있어서,The method of claim 1, 상기 지지부에는, 상기 지지부의 중심을 지나며 상기 마주보는 유로를 연결하는 두 개의 배수로가 형성되어 있으며,In the support portion, two drainage passages connecting the opposite flow path passing through the center of the support portion are formed, 상기 두 개의 배수로는 수직으로 교차하는 것을 특징으로 하는 배터리 팩 케이스.The battery pack case, characterized in that the two drains cross vertically. 제2항 또는 제3항에 있어서,The method according to claim 2 or 3, 상기 배수로는, 상기 지지부의 중심에 가까울수록 높아지는 경사를 가진 것을 특징으로 하는 배터리 팩 케이스.The drainage passage, the battery pack case characterized in that it has a slope that increases as the closer to the center of the support. 제1항에 있어서,The method of claim 1, 상기 상부 팩 케이스 및 상기 하부 팩 케이스는, 고분자 물질로 이루어 진 것을 특징으로 하는 배터리 팩 케이스.The upper pack case and the lower pack case, the battery pack case, characterized in that made of a polymeric material. 제5항에 있어서,The method of claim 5, 상기 고분자 물질은, 폴리카보네이트(PolyCarbonate)인 것을 특징으로 하는 배터리 팩 케이스.The polymer material is a battery pack case, characterized in that the polycarbonate (PolyCarbonate). 제5항에 있어서,The method of claim 5, 상기 고분자 물질은, 아크릴로니트릴-부타디엔-스타이렌 수지(Aacrylonitrile-Butadiene-Styrene resin)인 것을 특징으로 하는 배터리 팩 케이스.The polymer material is a battery pack case, characterized in that the acrylonitrile-butadiene-styrene resin (Aacrylonitrile-Butadiene-Styrene resin). 제5항에 있어서,The method of claim 5, 상기 고분자 물질은, 할로겐족 원소가 포함되지 않은 폴리카보네이트(PC)와 아크릴로니트릴-부타디엔-스타이렌 수지(ABS)의 혼합물인 것을 특징으로 하는 배터리 팩 케이스.The polymer material is a battery pack case, characterized in that the mixture of polycarbonate (PC) and acrylonitrile-butadiene-styrene resin (ABS) that does not contain a halogen group element. 제1항에 있어서,The method of claim 1, 상기 전극 터미널은, 황동인 것을 특징으로 하는 배터리 팩 케이스.The electrode terminal is a battery pack case, characterized in that the brass. 제1항에 있어서,The method of claim 1, 상기 케이스 실링부 및 터미널 실링부는, 실리콘 재질인 것을 특징으로 하는 배터리 팩 케이스.The case sealing part and the terminal sealing part, the battery pack case, characterized in that the silicon material. 제10항에 있어서,The method of claim 10, 상기 케이스 실링부 및 터미널 실링부는, 진동 융착을 통해서 상기 상부 팩 케이스 및 하부 팩 케이스와 결합된 것을 특징으로 하는 배터리 팩 케이스.The case sealing unit and the terminal sealing unit, the battery pack case, characterized in that coupled to the upper pack case and the lower pack case through vibration welding.
PCT/KR2014/003568 2013-04-29 2014-04-23 Battery pack case for vehicle Ceased WO2014178569A1 (en)

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