WO2017048020A1 - Battery pack - Google Patents

Battery pack Download PDF

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Publication number
WO2017048020A1
WO2017048020A1 PCT/KR2016/010271 KR2016010271W WO2017048020A1 WO 2017048020 A1 WO2017048020 A1 WO 2017048020A1 KR 2016010271 W KR2016010271 W KR 2016010271W WO 2017048020 A1 WO2017048020 A1 WO 2017048020A1
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WO
WIPO (PCT)
Prior art keywords
case
battery
inner case
battery cell
battery pack
Prior art date
Application number
PCT/KR2016/010271
Other languages
French (fr)
Korean (ko)
Inventor
송한갑
Original Assignee
주식회사 엘지화학
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 KR1020160116357A external-priority patent/KR101983639B1/en
Application filed by 주식회사 엘지화학 filed Critical 주식회사 엘지화학
Priority to CN201680022339.9A priority Critical patent/CN108140762B/en
Priority to JP2018504667A priority patent/JP6486552B2/en
Priority to US15/563,236 priority patent/US10454081B2/en
Priority to EP16846841.1A priority patent/EP3264519B1/en
Publication of WO2017048020A1 publication Critical patent/WO2017048020A1/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
    • H01M50/20—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
    • H01M50/231—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 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
    • 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
    • H01M10/659—Means for temperature control structurally associated with the cells by heat storage or buffering, e.g. heat capacity or liquid-solid phase changes or transition
    • 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, and more particularly, to a battery pack including a battery case excellent in cooling.
  • a rechargeable battery refers to a battery that can be charged and discharged unlike a primary battery that is not rechargeable.
  • Such secondary batteries include low-capacity battery packs used in portable electronic devices such as mobile phones, notebook computers, and camcorders, and high-capacity battery packs used for power sources for driving motors such as hybrid vehicles.
  • the battery pack includes a battery module provided with a plurality of battery cells and a battery case in which the battery module is built.
  • the battery pack according to the prior art has a problem that the performance greatly decreases when the battery module rises above the set temperature.
  • the present invention was invented to solve the above problems, an object of the present invention is to provide a battery case with excellent cooling can prevent the temperature rise of the battery module, thereby improving the performance of the battery module To provide a pack.
  • Battery pack according to the present invention for achieving the above object is a battery cell; And a battery case accommodating the battery cell, wherein the battery case is provided between an inner case accommodating the battery cell, an outer case provided outside the inner case, and the inner and outer cases, and the inner and outer sides. It may include a cooling member for indirectly cooling the battery cell to the cold generated by cooling the case.
  • the cooling member may have a thickness smaller than that of the inner case and the outer case.
  • the thickness of the cooling member may be 1nm to 1mm.
  • the cooling member may be provided with a phase change material (PCM).
  • PCM phase change material
  • the phase change material may be any one or a mixture of two or more selected from the group consisting of an inorganic substance, a paraffinic hydrocarbon, and an organic acid in the form of a hydrate.
  • the outer case may be provided to surround an outer circumferential surface of the inner case, and the cooling member may be provided as a coolant stored in a sealed space between the inner case and the outer case.
  • the battery case further includes a cutting member for cutting the inner case so that the cooling member is introduced into the inner case when the battery cell rises above the set temperature, the cooling member introduced into the inner case While directly contacting the battery cells can be cooled.
  • the cutting member includes a cutout provided on a surface of the inner case, and an expansion material provided between the inner case and the outer case and pressurized to cut the incision while expanding by high temperature heat transferred from the battery cell. can do.
  • the cutout may be formed as a cutout groove.
  • the expandable material may be a shape-memory alloy.
  • Both ends of the expansion material may be attached to the inner case and the outer case, respectively.
  • At least one cutting member may be provided on the entire wall surface of the battery case in which the cooling member is stored.
  • Battery pack according to the present invention for achieving the above object is a battery cell; And a battery case accommodating the battery cell, wherein the battery case is provided between an inner case accommodating the battery cell, an outer case provided outside the inner case, and the inner and outer cases, and the inner and outer sides. It may include a cooling member for indirectly cooling the battery cell to the cold generated by cooling the case.
  • the cooling member may have a thickness smaller than that of the inner case and the outer case.
  • the thickness of the cooling member may be 1 nm to 1 mm.
  • the cooling member may be provided with a phase change material (PCM).
  • PCM phase change material
  • the phase change material may be any one or a mixture of two or more selected from the group consisting of an inorganic substance, a paraffinic hydrocarbon, and an organic acid in the form of a hydrate.
  • the outer case may be provided to surround an outer circumferential surface of the inner case, and the cooling member may be provided as a coolant stored in a sealed space between the inner case and the outer case.
  • the battery case further includes a cutting member for cutting the inner case so that the cooling member is introduced into the inner case when the battery cell rises above the set temperature, the cooling member introduced into the inner case While directly contacting the battery cells can be cooled.
  • the cutting member includes a cutout provided on a surface of the inner case, and an expansion material provided between the inner case and the outer case and pressurized to cut the incision while expanding by high temperature heat transferred from the battery cell. can do.
  • the cutout may be formed as a cutout groove.
  • the expandable material may be a shape-memory alloy.
  • Both ends of the expansion material may be attached to the inner case and the outer case, respectively.
  • At least one cutting member may be provided on the entire wall surface of the battery case in which the cooling member is stored.
  • FIG. 1 is a view showing a battery pack according to a first embodiment of the present invention.
  • Figure 2 is an enlarged view 'A' portion shown in FIG.
  • FIG 3 is a view showing a battery pack according to a second embodiment of the present invention.
  • FIG. 4 is an enlarged view of a portion 'B' shown in FIG. 3;
  • FIG. 5 and 6 are views showing the incision from the inside of the battery case
  • FIG. 5 is a partial cutaway view showing a cut having a band shape
  • Figure 6 is a partial cutaway view showing a cut having a ring shape. being.
  • FIG. 7 is a view showing an operating state of a battery pack according to a second embodiment of the present invention.
  • the battery pack 100 includes one or more battery cells 110 and a battery case 120 accommodating the battery cells 110.
  • the battery cell 110 includes an electrode assembly in which a first electrode, a separator, and a second electrode are sequentially stacked, and a case assembly accommodating an electrolyte solution together with the electrode assembly.
  • a first electrode tab is provided on the first electrode
  • a second electrode tab is provided on the second electrode
  • a first electrode terminal is coupled to the first electrode tab
  • a second electrode terminal is coupled to the second electrode tab.
  • the first electrode is an anode and the second electron is a cathode.
  • the case assembly may include a can containing an electrode assembly and an electrolyte, and a cap assembly mounted in an opening of the can.
  • the battery case 120 is for accommodating one or more battery cells 110, and accommodates the battery cell 110 and the electrolyte therein, and forms an inner wall 121 and an inner case 121. It includes an outer case 122 provided on the outer side of the outer wall surface.
  • the battery cell 110 generates heat during charging and discharging.
  • the heat gradually accumulates inside the sealed battery case 120, thereby rapidly increasing the temperature of the battery cell 110 and the electrolyte, and thus, the battery cell ( There is a problem that the performance degradation of the battery cell 110 occurs due to the rapid temperature rise of 110.
  • the battery pack 100 includes a cooling member 123 having excellent cooling property between the inner case 121 and the outer case 122 of the battery case 120, and the cooling is performed.
  • the member 123 cools the inner case 121 and the outer case 122, and is accumulated in the battery case 120 by cold generated by cooling the inner case 121 by the cooling member 123.
  • the heat can be absorbed and cooled, and the temperature of the battery cell 110 can be suppressed while the internal temperature of the battery case 120 decreases, thereby improving performance.
  • the battery pack 100 of the present invention indirectly cools the battery cell 110 with cold generated by cooling the inner and outer cases 121 and 122 through the cooling member 123 having excellent cooling property.
  • the performance of the battery cell 110 may be prevented from rising.
  • the cooling member 123 has a thickness smaller than the inner case 121 and the outer case 122.
  • the cooling member 123 may be formed to have a thickness smaller than that of the inner case 121 and the outer case 122, thereby improving productability, and minimizing deformation of the inner case 121 or the outer case 122.
  • the thickness of the cooling member 123 may be 1 nm to 1 mm. That is, when the thickness of the cooling member 123 is 1 nm or less, the cooling efficiency is greatly reduced due to the thickness being too thin.
  • the thickness of the cooling member 123 is 1 mm or more, the inner case 121 and the outer case 122 are bent in the direction of the cooling member 123. As the angle increases, deformation may occur.
  • the cooling member 123 is provided with a phase change material (PCM).
  • PCM phase change material
  • the phase change material accumulates a large amount of thermal energy or emits thermal energy through the phase change process. That is, the phase change material is changed from one state to another, such as solid to liquid, liquid to solid, liquid to gas, and gas to liquid. Using changing physical processes, the heat is absorbed or released.
  • the phase change material may be used by mixing any one or two or more selected from the group consisting of inorganic materials, paraffinic hydrocarbons and organic acids in the form of a hydrate so as to absorb a large amount of heat emitted from the battery cell 110. do.
  • the battery pack 100 may absorb a large amount of heat emitted from the battery cell 110 by including the cooling member 123 which is a phase change material in the battery case 120.
  • the performance of the battery cell 110 may be improved by preventing the temperature rise of the battery cell 110.
  • the battery pack 100 includes one or more battery cells 110 and a battery case 120 accommodating the battery cells 110.
  • the battery case 120 is provided between an inner case 121 accommodating the battery cell 110, an outer case 122 provided outside the inner case 121, and inner and outer cases 121 and 122.
  • a cooling member 123 which indirectly cools the battery cell 110 with cold generated by cooling the inner and outer cases 121 and 122.
  • the outer case 122 is provided in a form surrounding the outer circumferential surface of the inner case 121, thereby forming a sealed space between the inner case 121 and the outer case 122, the cooling member ( While the 123 is stored, external exposure or leakage of the cooling member 123 may be prevented.
  • the cooling member 123 is provided with a coolant that is stored in a sealed space between the inner case 121 and the outer case 122, and thus the cooling member 123, which is a coolant, is an outer case (inside the inner case 121).
  • the contact force with 122 can be raised, and the outer case 122 of the inner case 121 can be cooled effectively.
  • the battery pack 100 has a limit in lowering the temperature of the battery cell 110 only by indirect cooling of the cooling member 123 when charging (overcharge) exceeding the rated capacity greatly occurs, and thus As the temperature gradually rises, it may explode or ignite.
  • the battery pack 100 when the battery cell 110 rises above the set temperature, the cooling member 123, which is a coolant inside the inner case 121 By flowing in, the battery cell 110 contained in the inner case 121 is directly cooled. This can prevent the temperature rise of the battery cell 110, it can be prevented from explosion or fire.
  • the cooling member 123 flows into the inner case 121. It further includes a cutting member 124 for cutting the inner case 121 so that the cooling member 123, which is a coolant introduced into the inner case 121, directly cools the battery cell 110 while being in contact with the battery cell 110. The temperature of 110 can be lowered.
  • the cutting member 124 is provided between the cutout 124a provided on the surface of the inner case 121 and the inner case 121 and the outer case 122 where the cutout 124a is positioned and the battery cell 110.
  • the expansion part 124b pressurizes the cutout 124a in the inner direction of the inner case 121 while expanding by the high temperature heat transmitted from the bottom surface.
  • the cutout 124a is formed as a cutout groove on the surface of the inner case 121. That is, as shown in FIG. 5, the cutout 124a has a band shape in which both ends thereof face in opposite directions to each other, and the expanded material 124b presses the cutout 124a directly while pressing the cutout 124a. Incision In addition, as shown in FIG. 6, the cutout 124a has a ring shape in which both ends are connected to each other, and the expanded material 124b presses the center of the ring-shaped cutout 124a while cutting the cutout 124a. Incision At this time, the circular case is formed in the inner case 121, so that the cooling member 123 can be introduced more effectively.
  • the inflated material 124b is supported by the inner case 121 having the inner end thereof with the cutout 124a and the outer end of the expanded material 124b at the position corresponding to the cutout 124a.
  • the inner and outer ends of the inflating material 124b are adhered to the inner case 121 and the outer case 122, respectively, thereby stably inflating the inflating material 124b between the inner case 121 and the outer case 122.
  • the set temperature may be 80 ⁇ 100 °C.
  • the expansion material 124b is made of a shape-memory alloy. That is, the shape memory alloy refers to a metal that remembers the original shape even when deformation occurs due to high temperature, and then restores its original state when the temperature decreases.
  • shape memory alloys include nickel-titanium alloys, copper-zinc alloys, gold-cadmium alloys, and indium thallium alloys.
  • the expanded material 124b which is a shape memory alloy
  • the expanded material 124b which is a shape memory alloy
  • the expanded material 124b returns to its original form unless the battery cell 110 rises above the set temperature.
  • At least one cutting member 124 is provided on the entire wall surface of the battery case 120 in which the cooling member 123 is stored. That is, a cutting member 124 is provided between the inner and outer cases 121 and 122 provided at the front, rear, right and left sides of the battery case 120 in which the cooling member 123 is stored, and thus the front and rear of the inner case 121.
  • the cooling member 123 may be introduced in left, right, up and down directions, thereby improving cooling of the battery cell 110.
  • the temperature of the battery cell 110 accommodated in the battery case 120 increases during charging and discharging of the battery pack 100.
  • the cooling member 123 of the battery case 120 to suppress the temperature rise of the battery cell 110, thereby preventing the performance degradation of the battery cell 110.
  • the battery cell 110 accommodated in the battery case 120 rises above the set temperature.
  • the inflating material 124b of the cutting member 124 is expanded by the heat source transmitted from the battery cell 110 while pressing the incision 124a provided in the inner case 121 to cut, and the inner case 121
  • the cooling member 123 flows into the cut portion of the battery cell 110, the battery cell 110 is directly cooled to suppress the temperature rise of the battery cell 110.
  • the battery pack 100 directly cools the battery cell 110 through the cooling member 123 stored in the battery case 120 when the battery cell 110 rises above the set temperature.
  • the battery cell 110 may be cooled effectively, and thus explosion or fire of the battery pack 100 may be prevented.

Abstract

A battery pack of the present invention comprises: a battery cell; and a battery case for accommodating the battery cell, wherein the battery case comprises: an inner case for accommodating the battery cell; an outer case provided outside the inner case; and a cooling member, provided between the inner and outer cases, for indirectly cooling the battery cell by means of cold air generated as the inner and outer cases are cooled.

Description

전지팩Battery pack
관련출원과의 상호인용Citation with Related Applications
본 출원은 2015년 09월 18일자 한국특허출원 제10-2015-0132621호 및 2016년 09월 09일자 한국특허출원 제10-2016-0116357호에 기초한 우선권의 이익을 주장하며, 해당 한국특허출원의 문헌에 개시된 모든 내용은 본 명세서의 일부로서 포함된다.This application claims the benefit of priority based on Korean Patent Application No. 10-2015-0132621 dated September 18, 2015 and Korean Patent Application No. 10-2016-0116357 dated September 09, 2016. All content disclosed in the literature is included as part of this specification.
기술분야Technical Field
본 발명은 전지팩에 관한 것으로서, 특히 냉각성이 우수한 전지 케이스가 포함된 전지팩에 관한 것이다.The present invention relates to a battery pack, and more particularly, to a battery pack including a battery case excellent in cooling.
일반적으로 이차 전지(rechargeable battery)는 충전이 불가능한 일차전지와는 달리 충전 및 방전이 가능한 전지를 말한다. Generally, a rechargeable battery refers to a battery that can be charged and discharged unlike a primary battery that is not rechargeable.
이러한 이차 전지는 휴대폰이나 노트북 컴퓨터 및 캠코더와 같이 휴대가 가능한 소형 전자기기에 사용되는 저용량 전지팩과, 하이브리드 자동차 등의 모터 구동용 전원에 사용되는 대용량 전지팩이 있다.Such secondary batteries include low-capacity battery packs used in portable electronic devices such as mobile phones, notebook computers, and camcorders, and high-capacity battery packs used for power sources for driving motors such as hybrid vehicles.
전지팩은 복수개의 전지셀로 마련되는 전지모듈과, 상기 전지모듈이 내장되는 전지 케이스를 포함한다.The battery pack includes a battery module provided with a plurality of battery cells and a battery case in which the battery module is built.
그러나 종래기술에 따른 전지팩은 상기 전지모듈이 설정 온도 이상 상승하면 성능이 크게 떨어뜨리는 문제가 있었다.However, the battery pack according to the prior art has a problem that the performance greatly decreases when the battery module rises above the set temperature.
본 발명은 상기와 같은 문제점을 해결하기 위해 발명된 것으로, 본 발명의 목적은 냉각성이 우수한 전지 케이스를 마련함으로써 전지모듈의 온도 상승을 방지할 수 있으며, 이에 전지모듈의 성능을 향상시킬 수 있는 전지팩을 제공하는데 있다.The present invention was invented to solve the above problems, an object of the present invention is to provide a battery case with excellent cooling can prevent the temperature rise of the battery module, thereby improving the performance of the battery module To provide a pack.
상기와 같은 목적을 달성하기 위한 본 발명에 따른 전지팩은 전지셀; 상기 전지셀을 수용하는 전지 케이스를 포함하며, 상기 전지 케이스는 상기 전지셀을 수용하는 내측 케이스와, 상기 내측 케이스 외측에 구비되는 외측 케이스, 및 상기 내측 및 외측 케이스 사이에 구비되고 상기 내측 및 외측 케이스를 냉각함에 따라 발생하는 냉기로 상기 전지셀을 간접 냉각하는 냉각부재를 포함할 수 있다.Battery pack according to the present invention for achieving the above object is a battery cell; And a battery case accommodating the battery cell, wherein the battery case is provided between an inner case accommodating the battery cell, an outer case provided outside the inner case, and the inner and outer cases, and the inner and outer sides. It may include a cooling member for indirectly cooling the battery cell to the cold generated by cooling the case.
상기 냉각부재는 상기 내측 케이스 및 상기 외측 케이스 보다 작은 두께를 가질 수 있다.The cooling member may have a thickness smaller than that of the inner case and the outer case.
상기 냉각부재의 두께는 1nm 내지 1mm일 수 있다.The thickness of the cooling member may be 1nm to 1mm.
상기 냉각부재는 상변화 물질(phase change material, PCM)로 마련될 수 있다.The cooling member may be provided with a phase change material (PCM).
상기 상변화 물질은 수화물 형태의 무기물, 파라핀계 탄화수소 및 유기산으로 이루어진 군으로부터 선택되는 어느 하나 또는 2종 이상의 혼합물일 수 있다.The phase change material may be any one or a mixture of two or more selected from the group consisting of an inorganic substance, a paraffinic hydrocarbon, and an organic acid in the form of a hydrate.
상기 외측 케이스는 상기 내측 케이스의 외주면을 감싸는 형태로 구비되고, 상기 냉각부재는 상기 내측 케이스와 상기 외측 케이스 사이의 밀폐된 공간에 저장되는 냉각액으로 마련될 수 있다.The outer case may be provided to surround an outer circumferential surface of the inner case, and the cooling member may be provided as a coolant stored in a sealed space between the inner case and the outer case.
상기 전지케이스는 상기 전지셀이 설정 온도 이상 상승하면, 상기 냉각부재가 상기 내측 케이스의 내부로 유입되도록 상기 내측 케이스를 절개하는 절개부재를 더 포함하며, 상기 내측 케이스의 내부로 유입된 상기 냉각부재는 상기 전지셀을 접촉되면서 직접 냉각할 수 있다.The battery case further includes a cutting member for cutting the inner case so that the cooling member is introduced into the inner case when the battery cell rises above the set temperature, the cooling member introduced into the inner case While directly contacting the battery cells can be cooled.
상기 절개부재는 상기 내측 케이스의 표면에 구비되는 절개부, 및 상기 내측 케이스와 상기 외측 케이스 사이에 구비되고 상기 전지셀로부터 전달되는 고온의 열에 의해 팽창하면서 상기 절개부를 가압하여 절개시키는 팽창물질을 포함할 수 있다.The cutting member includes a cutout provided on a surface of the inner case, and an expansion material provided between the inner case and the outer case and pressurized to cut the incision while expanding by high temperature heat transferred from the battery cell. can do.
상기 절개부는 절개홈으로 형성될 수 있다.The cutout may be formed as a cutout groove.
상기 팽창물질은 형상 기억 합금(shape-memory alloy)일 수 있다.The expandable material may be a shape-memory alloy.
상기 팽창물질의 양 단부는 상기 내측 케이스와 상기 외측 케이스에 각각 접착될 수 있다.Both ends of the expansion material may be attached to the inner case and the outer case, respectively.
상기 절개부재는 상기 냉각부재가 저장된 상기 전지케이스의 벽면 전체에 적어도 하나 이상 구비될 수 있다.At least one cutting member may be provided on the entire wall surface of the battery case in which the cooling member is stored.
상기와 같은 목적을 달성하기 위한 본 발명에 따른 전지팩은 전지셀; 상기 전지셀을 수용하는 전지 케이스를 포함하며, 상기 전지 케이스는 상기 전지셀을 수용하는 내측 케이스와, 상기 내측 케이스 외측에 구비되는 외측 케이스, 및 상기 내측 및 외측 케이스 사이에 구비되고 상기 내측 및 외측 케이스를 냉각함에 따라 발생하는 냉기로 상기 전지셀을 간접 냉각하는 냉각부재를 포함할 수 있다.Battery pack according to the present invention for achieving the above object is a battery cell; And a battery case accommodating the battery cell, wherein the battery case is provided between an inner case accommodating the battery cell, an outer case provided outside the inner case, and the inner and outer cases, and the inner and outer sides. It may include a cooling member for indirectly cooling the battery cell to the cold generated by cooling the case.
상기 냉각부재는 상기 내측 케이스 및 상기 외측 케이스 보다 작은 두께를 가질 수 있다.The cooling member may have a thickness smaller than that of the inner case and the outer case.
상기 냉각부재의 두께는 1 nm 내지 1 mm일 수 있다.The thickness of the cooling member may be 1 nm to 1 mm.
상기 냉각부재는 상변화 물질(phase change material, PCM)로 마련될 수 있다.The cooling member may be provided with a phase change material (PCM).
상기 상변화 물질은 수화물 형태의 무기물, 파라핀계 탄화수소 및 유기산으로 이루어진 군으로부터 선택되는 어느 하나 또는 2종 이상의 혼합물일 수 있다.The phase change material may be any one or a mixture of two or more selected from the group consisting of an inorganic substance, a paraffinic hydrocarbon, and an organic acid in the form of a hydrate.
상기 외측 케이스는 상기 내측 케이스의 외주면을 감싸는 형태로 구비되고, 상기 냉각부재는 상기 내측 케이스와 상기 외측 케이스 사이의 밀폐된 공간에 저장되는 냉각액으로 마련될 수 있다.The outer case may be provided to surround an outer circumferential surface of the inner case, and the cooling member may be provided as a coolant stored in a sealed space between the inner case and the outer case.
상기 전지케이스는 상기 전지셀이 설정 온도 이상 상승하면, 상기 냉각부재가 상기 내측 케이스의 내부로 유입되도록 상기 내측 케이스를 절개하는 절개부재를 더 포함하며, 상기 내측 케이스의 내부로 유입된 상기 냉각부재는 상기 전지셀을 접촉되면서 직접 냉각할 수 있다.The battery case further includes a cutting member for cutting the inner case so that the cooling member is introduced into the inner case when the battery cell rises above the set temperature, the cooling member introduced into the inner case While directly contacting the battery cells can be cooled.
상기 절개부재는 상기 내측 케이스의 표면에 구비되는 절개부, 및 상기 내측 케이스와 상기 외측 케이스 사이에 구비되고 상기 전지셀로부터 전달되는 고온의 열에 의해 팽창하면서 상기 절개부를 가압하여 절개시키는 팽창물질을 포함할 수 있다.The cutting member includes a cutout provided on a surface of the inner case, and an expansion material provided between the inner case and the outer case and pressurized to cut the incision while expanding by high temperature heat transferred from the battery cell. can do.
상기 절개부는 절개홈으로 형성될 수 있다.The cutout may be formed as a cutout groove.
상기 팽창물질은 형상 기억 합금(shape-memory alloy)일 수 있다.The expandable material may be a shape-memory alloy.
상기 팽창물질의 양 단부는 상기 내측 케이스와 상기 외측 케이스에 각각 접착될 수 있다.Both ends of the expansion material may be attached to the inner case and the outer case, respectively.
상기 절개부재는 상기 냉각부재가 저장된 상기 전지케이스의 벽면 전체에 적어도 하나 이상 구비될 수 있다.At least one cutting member may be provided on the entire wall surface of the battery case in which the cooling member is stored.
도 1은 본 발명의 제1 실시예에 따른 전지팩을 도시한 도면.1 is a view showing a battery pack according to a first embodiment of the present invention.
도 2는 도 1에 표시된 'A'부분 확대도.Figure 2 is an enlarged view 'A' portion shown in FIG.
도 3은 본 발명의 제2 실시예에 따른 전지팩을 도시한 도면.3 is a view showing a battery pack according to a second embodiment of the present invention.
도 4는 도 3에 표시된 'B'부분 확대도.4 is an enlarged view of a portion 'B' shown in FIG. 3;
도 5 및 도 6은 절개부를 전지 케이스 내부에서 바라본 모습을 도시한 도면으로, 도 5는 띠 형태를 가지는 절개부를 도시한 부분절개 도면이고, 도 6은 링 형태를 가지는 절개부를 도시한 부분절개 도면임.5 and 6 are views showing the incision from the inside of the battery case, FIG. 5 is a partial cutaway view showing a cut having a band shape, Figure 6 is a partial cutaway view showing a cut having a ring shape. being.
도 7은 본 발명의 제2 실시예에 따른 전지팩의 작용상태를 도시한 도면.7 is a view showing an operating state of a battery pack according to a second embodiment of the present invention.
아래에서는 첨부한 도면을 참조하여 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자가 용이하게 실시할 수 있도록 본 발명의 실시예를 상세히 설명한다. 그러나 본 발명은 여러 가지 상이한 형태로 구현될 수 있으며 여기에서 설명하는 실시예에 한정되지 않는다. 그리고 도면에서 본 발명을 명확하게 설명하기 위해서 설명과 관계없는 부분은 생략하였으며, 명세서 전체를 통하여 유사한 부분에 대해서는 유사한 도면 부호를 붙였다.DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.
[본 발명의 제1 실시예][First embodiment of the present invention]
본 발명의 제1 실시예에 따른 전지팩(100)은 하나 이상의 전지셀(110), 및 전지셀(110)을 수용하는 전지 케이스(120)를 포함한다.The battery pack 100 according to the first embodiment of the present invention includes one or more battery cells 110 and a battery case 120 accommodating the battery cells 110.
전지셀(110)은 제1 전극, 분리막 및 제2 전극이 순차적으로 적층되는 전극조립체와 상기 전극조립체와 함께 전해액을 수용하는 케이스 조립체를 포함한다. 그리고 상기 제1 전극에는 제1 전극탭이, 제2 전극에는 제2 전극탭이 각각 구비되고, 상기 제1 전극탭에는 제1 전극단자가, 제2 전극탭에는 제2 전극단자가 결합된다. 한편, 제1 전극은 양극이고, 제2 전자는 음극이다. 물론 반대일 수도 있다. 또한, 상기 케이스 조립체는 전극조립체 및 전해액을 수용하는 캔과, 캔의 개구부에 실장되는 캡 조립체를 포함한다.The battery cell 110 includes an electrode assembly in which a first electrode, a separator, and a second electrode are sequentially stacked, and a case assembly accommodating an electrolyte solution together with the electrode assembly. A first electrode tab is provided on the first electrode, a second electrode tab is provided on the second electrode, and a first electrode terminal is coupled to the first electrode tab, and a second electrode terminal is coupled to the second electrode tab. On the other hand, the first electrode is an anode and the second electron is a cathode. Of course, the opposite may be true. In addition, the case assembly may include a can containing an electrode assembly and an electrolyte, and a cap assembly mounted in an opening of the can.
전지 케이스(120)는 하나 이상의 전지셀(110)을 수용하기 위한 것으로, 내부에 전지셀(110) 및 전해액을 수용하는 한편, 내벽면을 형성하는 내측 케이스(121)와, 내측 케이스(121)의 외측에 구비되고 외벽면을 형성하는 외측 케이스(122)를 포함한다.The battery case 120 is for accommodating one or more battery cells 110, and accommodates the battery cell 110 and the electrolyte therein, and forms an inner wall 121 and an inner case 121. It includes an outer case 122 provided on the outer side of the outer wall surface.
여기서 전지셀(110)은 충방전시 열이 발생하며, 이 열은 밀폐된 전지 케이스(120)의 내부에 점차 축적되면서 전지셀(110) 및 전해액의 온도를 급격하게 상승시키고, 이에 전지셀(110)의 급격한 온도 상승으로 전지셀(110)의 성능 저하가 발생하는 문제가 있다.Here, the battery cell 110 generates heat during charging and discharging. The heat gradually accumulates inside the sealed battery case 120, thereby rapidly increasing the temperature of the battery cell 110 and the electrolyte, and thus, the battery cell ( There is a problem that the performance degradation of the battery cell 110 occurs due to the rapid temperature rise of 110.
이와 같은 문제를 해결하기 위해 본 발명에 따른 전지팩(100)은 전지 케이스(120)의 내측 케이스(121)와 외측 케이스(122) 사이에 냉각성이 우수한 냉각부재(123)를 구비하며, 이 냉각부재(123)는 내측 케이스(121)와 외측 케이스(122)를 냉각하게 되는데, 이때 냉각부재(123)에 의해 내측 케이스(121)를 냉각함에 따라 발생하는 냉기로 전지 케이스(120) 내부에 축적되는 열을 흡수하여 냉각할 수 있고, 전지 케이스(120)의 내부 온도가 내려가면서 전지셀(110)의 온도 상승을 억제하여 성능을 높일 수 있다.In order to solve this problem, the battery pack 100 according to the present invention includes a cooling member 123 having excellent cooling property between the inner case 121 and the outer case 122 of the battery case 120, and the cooling is performed. The member 123 cools the inner case 121 and the outer case 122, and is accumulated in the battery case 120 by cold generated by cooling the inner case 121 by the cooling member 123. The heat can be absorbed and cooled, and the temperature of the battery cell 110 can be suppressed while the internal temperature of the battery case 120 decreases, thereby improving performance.
즉, 본 발명의 전지팩(100)은 냉각성이 우수한 냉각부재(123)를 통해 내측 및 외측 케이스(121)(122)를 냉각함에 따라 발생하는 냉기로 전지셀(110)을 간접 냉각하며, 이에 전지셀(110)의 온도 상승을 방지하여 성능을 높일 수 있다.That is, the battery pack 100 of the present invention indirectly cools the battery cell 110 with cold generated by cooling the inner and outer cases 121 and 122 through the cooling member 123 having excellent cooling property. The performance of the battery cell 110 may be prevented from rising.
한편, 냉각부재(123)는 내측 케이스(121)와 외측 케이스(122) 보다 작은 두께를 가진다.On the other hand, the cooling member 123 has a thickness smaller than the inner case 121 and the outer case 122.
즉, 냉각부재(123)의 두께가 내측 케이스(121)와 외측 케이스(122)의 두께 보다 크면, 전지 케이스(120)의 두께 증대로 인해 제품성이 떨어지며, 특히 냉각부재로 액체를 사용할 경우 상기 공간으로 내측 케이스(121) 또는 외측 케이스(122)의 변형이 발생할 수 있다. 이에 냉각부재(123)를 내측 케이스(121)와 외측 케이스(122) 보다 작은 두께로 형성하여 제품성을 높일 수 있고, 내측 케이스(121) 또는 외측 케이스(122)의 변형을 최소화할 수 있다. That is, when the thickness of the cooling member 123 is greater than the thickness of the inner case 121 and the outer case 122, the productability is lowered due to the increase in the thickness of the battery case 120, in particular when the liquid is used as the cooling member Deformation of the inner case 121 or the outer case 122 may occur into the space. Accordingly, the cooling member 123 may be formed to have a thickness smaller than that of the inner case 121 and the outer case 122, thereby improving productability, and minimizing deformation of the inner case 121 or the outer case 122.
한편, 냉각부재(123)의 두께는 1 nm 내지 1 mm일 수 있다. 즉, 냉각부재(123)의 두께가 1 nm 이하이면 너무 얇은 두께로 인해 냉각 효율이 크게 떨어지며, 1 mm 이상이면 냉각부재(123) 방향으로 내측 케이스(121) 및 외측 케이스(122)가 굽혀지는 각도가 커지면서 변형이 발생할 수 있다.On the other hand, the thickness of the cooling member 123 may be 1 nm to 1 mm. That is, when the thickness of the cooling member 123 is 1 nm or less, the cooling efficiency is greatly reduced due to the thickness being too thin. When the thickness of the cooling member 123 is 1 mm or more, the inner case 121 and the outer case 122 are bent in the direction of the cooling member 123. As the angle increases, deformation may occur.
한편, 냉각부재(123) 상변화 물질(phase change material, PCM)로 마련된다. 상변화물질은 상변화과정을 통하여 많은 양의 열에너지를 축적하거나 열에너지를 방출하며, 즉, 상변화물질은 고체에서 액체, 액체에서 고체, 액체에서 기체, 기체에서 액체 등 하나의 상태에서 다른 상태로 변하는 물리적 변화과정을 이용하여 열을 흡수하거나 또는 흡수한 열을 방출한다.On the other hand, the cooling member 123 is provided with a phase change material (PCM). The phase change material accumulates a large amount of thermal energy or emits thermal energy through the phase change process. That is, the phase change material is changed from one state to another, such as solid to liquid, liquid to solid, liquid to gas, and gas to liquid. Using changing physical processes, the heat is absorbed or released.
여기서 상변화물질은 전지셀(110)로부터 발산되는 많은 양의 열을 흡수할 수 있도록 수화물 형태의 무기물, 파라핀계 탄화수소 및 유기산으로 이루어진 군으로부터 선택되는 어느 하나 또는 이들 중 2종 이상을 혼합하여 사용한다.Here, the phase change material may be used by mixing any one or two or more selected from the group consisting of inorganic materials, paraffinic hydrocarbons and organic acids in the form of a hydrate so as to absorb a large amount of heat emitted from the battery cell 110. do.
따라서 본 발명의 제1 실시예에 따른 전지팩(100)은 전지 케이스(120)에 상변화 물질인 냉각부재(123)를 구비함으로써 전지셀(110)로부터 발산되는 많은 양의 열을 흡수할 수 있으며, 이에 전지셀(110)의 온도 상승을 방지하여 전지셀(110)의 성능을 높일 수 있다.Therefore, the battery pack 100 according to the first embodiment of the present invention may absorb a large amount of heat emitted from the battery cell 110 by including the cooling member 123 which is a phase change material in the battery case 120. In this case, the performance of the battery cell 110 may be improved by preventing the temperature rise of the battery cell 110.
이하, 본 발명에 따른 다른 실시예를 설명함에 있어 전술한 제1 실시예와 동일한 기능을 가지는 구성에 대해서는 동일한 구성부호를 사용하며, 중복되는 설명은 생략한다.Hereinafter, in describing other embodiments according to the present invention, the same reference numerals are used for components having the same function as the above-described first embodiment, and overlapping descriptions are omitted.
[본 발명의 제2 실시예][Second embodiment of the present invention]
본 발명의 제2 실시예에 따른 전지팩(100)은 도 3에 도시되어 있는 것과 같이, 하나 이상의 전지셀(110), 및 전지셀(110)을 수용하는 전지 케이스(120)를 포함하며, 전지 케이스(120)는 전지셀(110)을 수용하는 내측 케이스(121)와, 내측 케이스(121) 외측에 구비되는 외측 케이스(122), 및 내측 및 외측 케이스(121)(122) 사이에 구비되고 내측 및 외측 케이스(121)(122)를 냉각함에 따라 발생하는 냉기로 전지셀(110)을 간접 냉각하는 냉각부재(123)를 포함한다.As shown in FIG. 3, the battery pack 100 according to the second embodiment of the present invention includes one or more battery cells 110 and a battery case 120 accommodating the battery cells 110. The battery case 120 is provided between an inner case 121 accommodating the battery cell 110, an outer case 122 provided outside the inner case 121, and inner and outer cases 121 and 122. And a cooling member 123 which indirectly cools the battery cell 110 with cold generated by cooling the inner and outer cases 121 and 122.
여기서 외측 케이스(122)는 내측 케이스(121)의 외주면을 감싸는 형태로 구비되며, 이에 내측 케이스(121)와 외측 케이스(122) 사이에 밀폐된 공간을 형성되고, 상기 밀폐된 공간에 냉각부재(123)가 저장되면서 냉각부재(123)의 외부 노출 또는 유출을 방지할 수 있다.The outer case 122 is provided in a form surrounding the outer circumferential surface of the inner case 121, thereby forming a sealed space between the inner case 121 and the outer case 122, the cooling member ( While the 123 is stored, external exposure or leakage of the cooling member 123 may be prevented.
또한, 냉각부재(123)는 내측 케이스(121)와 외측 케이스(122) 사이의 밀폐된 공간에 저장되는 냉각액으로 마련되며, 이에 냉각액인 냉각부재(123)는 내측 케이스(121)의 외측 케이스(122)와의 접촉력을 높일 수 있고, 내측 케이스(121)의 외측 케이스(122)을 효과적으로 냉각할 수 있다.In addition, the cooling member 123 is provided with a coolant that is stored in a sealed space between the inner case 121 and the outer case 122, and thus the cooling member 123, which is a coolant, is an outer case (inside the inner case 121). The contact force with 122 can be raised, and the outer case 122 of the inner case 121 can be cooled effectively.
한편, 전지팩(100)은 정격용량을 크게 초과한 충전(과충전)이 발생할 경우 냉각부재(123)의 간접 냉각만으로는 전지셀(110)의 온도를 낮추는데 한계가 있으며, 이에 전지셀(110)의 온도가 점차 급상승하면서 폭발하거나 또는 발화가 발생할 수 있다.On the other hand, the battery pack 100 has a limit in lowering the temperature of the battery cell 110 only by indirect cooling of the cooling member 123 when charging (overcharge) exceeding the rated capacity greatly occurs, and thus As the temperature gradually rises, it may explode or ignite.
이와 같은 문제를 해결하기 위해 본 발명의 제2 실시예에 따른 전지팩(100)은 전지셀(110)이 설정 온도 이상 상승하면, 냉각액인 냉각부재(123)를 내측 케이스(121)의 내부에 유입시켜서 내측 케이스(121)에 수용된 전지셀(110)을 직접 냉각한다. 이에 전지셀(110)의 온도 상승을 방지할 수 있고, 폭발하거나 또는 발화를 방지할 수 있다.In order to solve such a problem, the battery pack 100 according to the second embodiment of the present invention, when the battery cell 110 rises above the set temperature, the cooling member 123, which is a coolant inside the inner case 121 By flowing in, the battery cell 110 contained in the inner case 121 is directly cooled. This can prevent the temperature rise of the battery cell 110, it can be prevented from explosion or fire.
즉, 본 발명의 제2 실시예에 따른 전지팩(100)의 전지케이스(120)는 전지셀(110)이 설정 온도 이상 상승하면, 냉각부재(123)가 내측 케이스(121)의 내부로 유입되도록 내측 케이스(121)를 절개하는 절개부재(124)를 더 포함하며, 내측 케이스(121)의 내부로 유입된 냉각액인 냉각부재(123)는 전지셀(110)에 접촉되면서 직접 냉각하여 전지셀(110)의 온도를 낮출 수 있다.That is, in the battery case 120 of the battery pack 100 according to the second embodiment of the present invention, when the battery cell 110 rises above the set temperature, the cooling member 123 flows into the inner case 121. It further includes a cutting member 124 for cutting the inner case 121 so that the cooling member 123, which is a coolant introduced into the inner case 121, directly cools the battery cell 110 while being in contact with the battery cell 110. The temperature of 110 can be lowered.
여기서 절개부재(124)는 내측 케이스(121)의 표면에 구비되는 절개부(124a), 및 절개부(124a)가 위치한 내측 케이스(121)와 외측 케이스(122) 사이에 구비되고 전지셀(110)로부터 전달되는 고온의 열에 의해 팽창하면서 절개부(124a)를 내측 케이스(121)의 내부 방향으로 가압하여 절개시키는 팽창물질(124b)을 포함한다.Here, the cutting member 124 is provided between the cutout 124a provided on the surface of the inner case 121 and the inner case 121 and the outer case 122 where the cutout 124a is positioned and the battery cell 110. The expansion part 124b pressurizes the cutout 124a in the inner direction of the inner case 121 while expanding by the high temperature heat transmitted from the bottom surface.
한편, 절개부(124a)는 내측 케이스(121)의 표면에 절개홈으로 형성된다. 즉, 절개부(124a)는 도 5에 도시되어 있는 것과 같이, 양 끝단이 서로 반대방향을 향하는 띠 형태를 가지며, 팽창물질(124b)은 절개부(124a)에 직접 가압하면서 절개부(124a)를 절개시킨다. 또한 절개부(124a)는 도 6에 도시되어 있는 것과 같이, 양 끝단이 서로 연결되는 링 형태를 가지며, 팽창물질(124b)은 링 형태의 절개부(124a) 중앙을 가압하면서 절개부(124a)를 절개시킨다. 이때 내측 케이스(121)에는 원형의 절개홀이 형성되면서 냉각부재(123)를 보다 효과적으로 유입시킬 수 있다.On the other hand, the cutout 124a is formed as a cutout groove on the surface of the inner case 121. That is, as shown in FIG. 5, the cutout 124a has a band shape in which both ends thereof face in opposite directions to each other, and the expanded material 124b presses the cutout 124a directly while pressing the cutout 124a. Incision In addition, as shown in FIG. 6, the cutout 124a has a ring shape in which both ends are connected to each other, and the expanded material 124b presses the center of the ring-shaped cutout 124a while cutting the cutout 124a. Incision At this time, the circular case is formed in the inner case 121, so that the cooling member 123 can be introduced more effectively.
그리고 팽창물질(124b)은 내측단이 절개부(124a)가 구비된 내측 케이스(121)에 지지되고, 외측단이 절개부(124a)와 대응하는 위치에서 외측 케이스(122)에 의해 지지된다. 특히 팽창물질(124b)의 내측단과 외측단은 각각 내측 케이스(121)와 외측 케이스(122)에 접착되며, 이에 팽창물질(124b)을 내측 케이스(121)와 외측 케이스(122) 사이에 안정적으로 고정할 수 있다.The inflated material 124b is supported by the inner case 121 having the inner end thereof with the cutout 124a and the outer end of the expanded material 124b at the position corresponding to the cutout 124a. In particular, the inner and outer ends of the inflating material 124b are adhered to the inner case 121 and the outer case 122, respectively, thereby stably inflating the inflating material 124b between the inner case 121 and the outer case 122. Can be fixed
한편, 상기 설정 온도는 80~100℃일 수 있다.On the other hand, the set temperature may be 80 ~ 100 ℃.
한편, 팽창물질(124b)은 형상 기억 합금(shape-memory alloy)으로 마련된다. 즉, 형상 기억 합금은 고열에 의해 변형이 발생하더라도 원래의 형태를 기억하고 있다가 온도가 내려가면 원상태로 복원되는 금속을 말한다. 이와 같은 형상 기억 합금은 니켈-티탄 합금, 동-아연 합금, 금-카드뮴 합금 및 인듐-탈륨 합금 등이 있다.On the other hand, the expansion material 124b is made of a shape-memory alloy. That is, the shape memory alloy refers to a metal that remembers the original shape even when deformation occurs due to high temperature, and then restores its original state when the temperature decreases. Such shape memory alloys include nickel-titanium alloys, copper-zinc alloys, gold-cadmium alloys, and indium thallium alloys.
이에, 형상 기억 합금인 팽창물질(124b)은 전지셀(110)의 온도 변화에 의해 형상이 변형되면서 상기 절개부(124a)를 가압하여 절개할 수 있다. 한편, 형상 기억 합금인 팽창물질(124b)은 전지셀(110)이 설정된 온도 이상으로 상승하지 않으면 다시 원래의 형태로 복귀한다.Accordingly, the expanded material 124b, which is a shape memory alloy, may be cut by pressing the cutout 124a while the shape is deformed by the temperature change of the battery cell 110. On the other hand, the expanded material 124b, which is a shape memory alloy, returns to its original form unless the battery cell 110 rises above the set temperature.
이와 같이 형상 기억 합금으로 팽창물질(124b)를 마련함으로써 전지셀(110)의 온도 변화에 빠른 대응이 가능하며, 이에 전지팩(100)의 안전성을 높일 수 있다.By providing the expansion material 124b with the shape memory alloy as described above, it is possible to respond quickly to the temperature change of the battery cell 110, thereby increasing the safety of the battery pack 100.
한편, 절개부재(124)는 냉각부재(123)가 저장된 전지 케이스(120)의 벽면 전체에 적어도 하나 이상 구비된다. 즉, 냉각부재(123)가 저장된 전지 케이스(120)의 전후좌우상하에 구비된 내측 및 외측 케이스(121)(122) 사이에 절개부재(124)를 구비하며, 이에 내측 케이스(121)의 전후좌우상하 방향으로 냉각부재(123)를 유입할 수 있어 전지셀(110)의 냉각성을 높일 수 있다.On the other hand, at least one cutting member 124 is provided on the entire wall surface of the battery case 120 in which the cooling member 123 is stored. That is, a cutting member 124 is provided between the inner and outer cases 121 and 122 provided at the front, rear, right and left sides of the battery case 120 in which the cooling member 123 is stored, and thus the front and rear of the inner case 121. The cooling member 123 may be introduced in left, right, up and down directions, thereby improving cooling of the battery cell 110.
이하, 이와 같은 구성을 가진 본 발명의 제2 실시예에 따른 전지팩(100)의 사용상태를 설명한다.Hereinafter, a state of use of the battery pack 100 according to the second embodiment of the present invention having such a configuration will be described.
도 7에 도시되어 있는 것과 같이, 전지팩(100)의 충방전시 전지 케이스(120) 내부에 수용된 전지셀(110)의 온도가 상승한다. 이때 전지 케이스(120)의 냉각부재(123)에 의해 전지셀(110)을 간접 냉각하여 전지셀(110)의 온도 상승을 억제하며, 이에 전지셀(110)의 성능저하를 방지한다.As shown in FIG. 7, the temperature of the battery cell 110 accommodated in the battery case 120 increases during charging and discharging of the battery pack 100. At this time, by indirectly cooling the battery cell 110 by the cooling member 123 of the battery case 120 to suppress the temperature rise of the battery cell 110, thereby preventing the performance degradation of the battery cell 110.
한편, 전지팩(100)의 충방전시 과충전이 발생하면, 전지 케이스(120) 내부에 수용된 전지셀(110)이 설정 온도 이상 상승한다. 이때 전지셀(110)로부터 전달되는 열원에 의해 절개부재(124)의 팽창물질(124b)이 팽창하면서 내측 케이스(121)에 구비된 절개부(124a)를 가압하여 절개시키고, 내측 케이스(121)의 절개 부분으로 냉각부재(123)가 유입되면서 전지셀(110)을 직접 냉각하여 전지셀(110)의 온도 상승을 억제한다.On the other hand, when overcharge occurs during the charge and discharge of the battery pack 100, the battery cell 110 accommodated in the battery case 120 rises above the set temperature. At this time, the inflating material 124b of the cutting member 124 is expanded by the heat source transmitted from the battery cell 110 while pressing the incision 124a provided in the inner case 121 to cut, and the inner case 121 As the cooling member 123 flows into the cut portion of the battery cell 110, the battery cell 110 is directly cooled to suppress the temperature rise of the battery cell 110.
따라서 본 발명의 제2 실시예에 따른 전지팩(100)은 전지셀(110)이 설정 온도 이상 상승하면 전지 케이스(120)에 저장된 냉각부재(123)를 통해 전지셀(110)을 직접 냉각함으로써 전지셀(110)을 효과적으로 냉각할 수 있고, 이에 전지팩(100)의 폭발 또는 발화를 방지할 수 있다.Therefore, the battery pack 100 according to the second embodiment of the present invention directly cools the battery cell 110 through the cooling member 123 stored in the battery case 120 when the battery cell 110 rises above the set temperature. The battery cell 110 may be cooled effectively, and thus explosion or fire of the battery pack 100 may be prevented.
본 발명의 범위는 상기 상세한 설명보다는 후술하는 특허청구범위에 의하여 나타내어지며, 특허청구범위의 의미 및 범위 그리고 그 균등 개념으로부터 도출되는 다양한 실시 형태가 본 발명의 범위에 포함되는 것으로 해석되어야 한다.The scope of the present invention is shown by the following claims rather than the above detailed description, and it should be construed that various embodiments derived from the meaning and scope of the claims and equivalent concepts thereof are included in the scope of the present invention.

Claims (12)

  1. 전지셀;Battery cell;
    상기 전지셀을 수용하는 전지 케이스를 포함하며,A battery case accommodating the battery cell,
    상기 전지 케이스는 상기 전지셀을 수용하는 내측 케이스와, 상기 내측 케이스 외측에 구비되는 외측 케이스, 및 상기 내측 및 외측 케이스 사이에 구비되고 상기 내측 및 외측 케이스를 냉각함에 따라 발생하는 냉기로 상기 전지셀을 간접 냉각하는 냉각부재를 포함하는 것을 특징으로 하는 전지팩.The battery case is provided between an inner case for accommodating the battery cell, an outer case provided outside the inner case, and the inner and outer cases, and the battery cell is cooled by cooling the inner and outer cases. A battery pack comprising a cooling member for indirect cooling.
  2. 청구항 1에 있어서,The method according to claim 1,
    상기 냉각부재는 상기 내측 케이스 및 상기 외측 케이스 보다 작은 두께를 가지는 것을 특징으로 하는 전지팩.The cooling member has a battery pack, characterized in that having a thickness smaller than the inner case and the outer case.
  3. 청구항 2에 있어서,The method according to claim 2,
    상기 냉각부재의 두께는 1nm 내지 1mm인 것을 특징으로 하는 전지팩.The thickness of the cooling member is a battery pack, characterized in that 1nm to 1mm.
  4. 청구항 1에 있어서,The method according to claim 1,
    상기 냉각부재는 상변화 물질(phase change material, PCM)로 마련되는 것을 특징으로 하는 전지팩.The cooling member is a battery pack, characterized in that provided with a phase change material (PCM).
  5. 청구항 4에 있어서,The method according to claim 4,
    상기 상변화 물질은 수화물 형태의 무기물, 파라핀계 탄화수소 및 유기산으로 이루어진 군으로부터 선택되는 어느 하나 또는 2종 이상의 혼합물인 것을 특징으로 하는 전지팩.The phase change material is a battery pack, characterized in that any one or a mixture of two or more selected from the group consisting of inorganic materials, paraffinic hydrocarbons and organic acids in the form of a hydrate.
  6. 청구항 1에 있어서,The method according to claim 1,
    상기 외측 케이스는 상기 내측 케이스의 외주면을 감싸는 형태로 구비되고,The outer case is provided in a form surrounding the outer peripheral surface of the inner case,
    상기 냉각부재는 상기 내측 케이스와 상기 외측 케이스 사이의 밀폐된 공간에 저장되는 냉각액으로 마련되는 것을 특징으로 하는 전지팩.The cooling member is a battery pack, characterized in that provided with a cooling liquid stored in a sealed space between the inner case and the outer case.
  7. 청구항 6에 있어서,The method according to claim 6,
    상기 전지 케이스는 상기 전지셀이 설정 온도 이상 상승하면, 상기 냉각부재가 상기 내측 케이스의 내부로 유입되도록 상기 내측 케이스를 절개하는 절개부재를 더 포함하며,The battery case further includes a cutting member for cutting the inner case so that the cooling member is introduced into the inner case when the battery cell rises above the set temperature,
    상기 내측 케이스의 내부로 유입된 상기 냉각부재는 상기 전지셀에 접촉되면서 상기 전지셀을 직접 냉각하는 것을 특징으로 하는 전지팩.The cooling member introduced into the inner case is a battery pack, characterized in that for direct contact with the battery cell to cool the battery cell directly.
  8. 청구항 7에 있어서,The method according to claim 7,
    상기 절개부재는 상기 내측 케이스의 표면에 구비되는 절개부, 및 상기 내측 케이스와 상기 외측 케이스 사이에 구비되고 상기 전지셀로부터 전달되는 고온의 열에 의해 팽창하면서 상기 절개부를 가압하여 절개시키는 팽창물질을 포함하는 것을 특징으로 하는 전지팩.The cutting member includes a cutout provided on a surface of the inner case, and an expansion material provided between the inner case and the outer case and pressurized to cut the incision while expanding by high temperature heat transferred from the battery cell. Battery pack characterized in that.
  9. 청구항 8에 있어서,The method according to claim 8,
    상기 절개부는 절개홈으로 형성되는 것을 특징으로 하는 전지팩.The cutout battery pack, characterized in that formed in the cut groove.
  10. 청구항 8에 있어서,The method according to claim 8,
    상기 팽창물질은 형상 기억 합금(shape-memory alloy)인 것을 특징으로 하는 전지팩.The expansion material is a battery pack, characterized in that the shape-memory alloy (shape-memory alloy).
  11. 청구항 8에 있어서,The method according to claim 8,
    상기 팽창물질의 양 단부는 상기 내측 케이스와 상기 외측 케이스에 각각 접착되는 것을 특징으로 하는 전지팩.Battery packs, characterized in that both ends of the expansion material are bonded to the inner case and the outer case, respectively.
  12. 청구항 8에 있어서,The method according to claim 8,
    상기 절개부재는 상기 냉각부재가 저장된 상기 전지 케이스의 벽면 전체에 적어도 하나 이상 구비되는 것을 특징으로 하는 전지팩.The battery pack, characterized in that at least one cutting member is provided on the entire wall surface of the battery case in which the cooling member is stored.
PCT/KR2016/010271 2015-09-18 2016-09-12 Battery pack WO2017048020A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN201680022339.9A CN108140762B (en) 2015-09-18 2016-09-12 Battery pack
JP2018504667A JP6486552B2 (en) 2015-09-18 2016-09-12 Battery pack
US15/563,236 US10454081B2 (en) 2015-09-18 2016-09-12 Battery pack
EP16846841.1A EP3264519B1 (en) 2015-09-18 2016-09-12 Battery pack

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KR10-2015-0132621 2015-09-18
KR20150132621 2015-09-18
KR1020160116357A KR101983639B1 (en) 2015-09-18 2016-09-09 Battery pack
KR10-2016-0116357 2016-09-09

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KR20060048991A (en) * 2004-08-06 2006-05-18 주식회사 엘지화학 Battery system containing phase change material-containing capsules in interior configuration thereof
KR100946580B1 (en) * 2005-09-02 2010-03-09 주식회사 엘지화학 Battery Pack Having Temperature-Controlling Endothermic Sheet
KR101097226B1 (en) * 2010-02-01 2011-12-21 에스비리모티브 주식회사 Battery pack
KR20140129449A (en) * 2013-04-29 2014-11-07 주식회사 엘지화학 Lithium secondary battery including phase change material
KR20140143854A (en) * 2013-06-07 2014-12-18 주식회사 엘지화학 Battery Pack Having Improved Safety against Leakage of Liquid Refrigerant

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KR20060048991A (en) * 2004-08-06 2006-05-18 주식회사 엘지화학 Battery system containing phase change material-containing capsules in interior configuration thereof
KR100946580B1 (en) * 2005-09-02 2010-03-09 주식회사 엘지화학 Battery Pack Having Temperature-Controlling Endothermic Sheet
KR101097226B1 (en) * 2010-02-01 2011-12-21 에스비리모티브 주식회사 Battery pack
KR20140129449A (en) * 2013-04-29 2014-11-07 주식회사 엘지화학 Lithium secondary battery including phase change material
KR20140143854A (en) * 2013-06-07 2014-12-18 주식회사 엘지화학 Battery Pack Having Improved Safety against Leakage of Liquid Refrigerant

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