WO2012169793A2 - 전지팩 안전장치 - Google Patents
전지팩 안전장치 Download PDFInfo
- Publication number
- WO2012169793A2 WO2012169793A2 PCT/KR2012/004487 KR2012004487W WO2012169793A2 WO 2012169793 A2 WO2012169793 A2 WO 2012169793A2 KR 2012004487 W KR2012004487 W KR 2012004487W WO 2012169793 A2 WO2012169793 A2 WO 2012169793A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- battery
- safety device
- battery pack
- conductive sheets
- battery module
- Prior art date
Links
- 238000007789 sealing Methods 0.000 claims abstract description 13
- 238000000926 separation method Methods 0.000 claims description 8
- 230000008961 swelling Effects 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 239000007769 metal material Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052804 chromium Inorganic materials 0.000 claims description 2
- 239000011651 chromium Substances 0.000 claims description 2
- 229910017052 cobalt Inorganic materials 0.000 claims description 2
- 239000010941 cobalt Substances 0.000 claims description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 229910052749 magnesium Inorganic materials 0.000 claims description 2
- 239000011777 magnesium Substances 0.000 claims description 2
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims description 2
- 229910052750 molybdenum Inorganic materials 0.000 claims description 2
- 239000011733 molybdenum Substances 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 230000035515 penetration Effects 0.000 abstract description 5
- 238000012986 modification Methods 0.000 abstract description 2
- 230000004048 modification Effects 0.000 abstract description 2
- 238000004880 explosion Methods 0.000 description 8
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 5
- 230000002159 abnormal effect Effects 0.000 description 5
- 229910052744 lithium Inorganic materials 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000000354 decomposition reaction Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 239000007772 electrode material Substances 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 239000011149 active material Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000012777 electrically insulating material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 229920001690 polydopamine Polymers 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000011076 safety test Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
- B60L50/64—Constructional details of batteries specially adapted for electric vehicles
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
-
- 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
- H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/574—Devices or arrangements for the interruption of current
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/574—Devices or arrangements for the interruption of current
- H01M50/578—Devices or arrangements for the interruption of current in response to pressure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/574—Devices or arrangements for the interruption of current
- H01M50/579—Devices or arrangements for the interruption of current in response to shock
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2200/00—Safety devices for primary or secondary batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2200/00—Safety devices for primary or secondary batteries
- H01M2200/20—Pressure-sensitive devices
-
- 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
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Definitions
- the present invention relates to a battery pack safety device, and more particularly, to be mounted on one side of a battery pack including two or more battery cells or one or more battery modules, and as a device for ensuring safety by short-circuit preferentially when penetrating the needle body.
- a safety device comprising a connection member connected to one of the positive and negative electrodes, respectively.
- Rechargeable batteries are not only used for mobile and wireless electronic devices such as mobile phones, digital cameras, PDAs, laptops, but also as energy sources for power devices such as electric bicycles (EVs), electric vehicles (EVs), and hybrid electric vehicles (HEVs). It is attracting a lot of attention.
- EVs electric bicycles
- EVs electric vehicles
- HEVs hybrid electric vehicles
- Small battery packs are packed with one battery cell for small devices such as mobile phones and cameras, while two or more battery cells (hereinafter sometimes referred to as "multi-cell") are used for medium and large devices such as notebooks and electric vehicles.
- multi-cell Battery cells
- Medium or large battery packs in which battery packs connected in parallel and / or in series are packed are used.
- the lithium secondary battery has a problem of low safety while having excellent electrical characteristics.
- lithium secondary batteries cause decomposition reactions of battery components, such as active materials and electrolytes, under abnormal operating conditions such as overcharge, overdischarge, exposure to high temperatures, and electrical short circuits to generate heat and gas, resulting in high temperature and high pressure.
- the condition of may further accelerate the decomposition reaction, resulting in an air ignition or explosion.
- the safety problem of the lithium secondary battery is more serious in the medium-large battery pack of the multi-cell structure. Due to the large number of battery cells used in a multi-cell battery pack, abnormal operation in some battery cells may cause a chain reaction to other battery cells, and the resulting ignition and explosion may cause a large accident. to be. Accordingly, the medium and large battery packs are equipped with safety systems such as fuses, bimetals, and battery management systems (BMSs) for protecting the battery cells from over discharge, over charge, over current, and the like.
- safety systems such as fuses, bimetals, and battery management systems (BMSs) for protecting the battery cells from over discharge, over charge, over current, and the like.
- the lithium secondary battery is gradually deteriorated in the continuous use, that is, the continuous charging and discharging process, the generator, the electrical connection member, etc.
- the deterioration of the generator is generated by the decomposition of the electrode material, electrolyte, etc. This causes the battery cells (cans, pouch cases) to gradually expand.
- the safety system BMS detects overdischarge, overcharge, overcurrent, and the like, and controls / protects the battery pack.
- the BMS is not operated in an abnormal situation, the risk increases and it becomes difficult to control the battery pack for safety.
- medium and large battery packs generally have a structure in which a plurality of battery cells are fixedly mounted in a predetermined case, each expanded battery cell is further pressurized in a limited case, and there is a risk of fire and explosion under abnormal operating conditions. This greatly increases.
- the battery cell Short may occur between them.
- the present invention aims to solve the problems of the prior art as described above and the technical problems that have been requested from the past.
- An object of the present invention is mounted on one side of the battery pack, when a physical deformation is caused to the battery pack by an external force, or when an event such as the penetration of the needle, such as to provide a safety device that can be short-circuited to ensure safety first do.
- Still another object of the present invention is to provide a battery pack comprising such a safety device.
- a device that is mounted on one side of a battery pack including two or more battery cells or one or more battery modules to ensure safety by short-circuit preferentially when penetrating the needle body,
- a pair of conductive sheets spaced apart from each other;
- An electrically insulating housing in which the conductive sheets are inserted and wrapped around the outer surface except the front surface;
- connection member connecting the conductive sheets to one positive electrode and one negative electrode of the battery cells of the battery module
- the secondary battery has a problem in terms of safety despite the excellent performance.
- a short circuit occurs when the positive electrode and the negative electrode contact each other.
- the temperature rises rapidly by the reaction of the electrode active materials.
- the abnormal operation in some battery cells may cause a chain reaction to the other battery cells, resulting in ignition to explosion.
- the safety device according to the present invention is mounted on one side of the battery pack, the conductive sheets of the safety device with a relatively low resistance when applying a strong external force that causes penetration or physical deformation by the needle like the above The current flows preferentially, causing an intentional short circuit and energizing. Accordingly, the energy flowing between the battery cells can be reduced to prevent ignition and explosion.
- the conductive sheet may be preferably made of a metal material.
- the kind of the conductive sheet is not particularly limited, and for example, at least one material selected from the group consisting of copper, aluminum, cobalt, chromium, copper, iron, magnesium, manganese, molybdenum, nickel, or an optional alloy thereof. Can be.
- each pair of grooves may be formed at the inner top and bottom of the housing so that the pair of conductive sheets can be inserted in a spaced apart state.
- a protrusion having a width corresponding to the separation distance of the grooves may be formed between the grooves so that the conductive sheets may be mounted and fixed in a spaced apart state, and the size of the protrusion is based on the height of the groove. It can be formed to a height of approximately 10 to 20%.
- the mutual separation distance of the conductive sheets may vary depending on design conditions, for example, but may be determined in a range of 0.1 cm to 10 cm, preferably 0.5 cm to 5 cm, but is not limited thereto.
- the sealing member is made of a structure for sealing the open front to block the conductive sheet from the outside, while protecting the conductive sheet from a weak external impact to the extent that safety is not caused, foreign matters inflow, moisture infiltration It acts to prevent back.
- the sealing member may be formed, for example, in a structure that seals a part of the opened front side and the opposite side surface except for the side position through which the connection member passes.
- the sealing member may be implemented in a variety of structures, for example, is mounted to the housing in a sliding manner, in close contact with the front of the housing while elastically deforming the sealing member, or attached to the hinge structure on one side of the housing Or a structure that is mounted in a coupling manner by a predetermined fastening structure.
- a sealing member is preferably made of an insulating material like the housing, but is not limited to such a material.
- connection member has a length capable of electrically connecting the positive electrode and the negative electrode of the conductive sheet and the battery module, respectively.
- the housing may have a structure in which a pair of grooves are formed to correspond to a position where the connection member is connected to the connection member and the conductive sheet.
- the connection member is prevented from being separated from the conductive sheet and the housing in the event of vibration.
- connection member is not particularly limited as long as it is a structure that can easily make an electrical connection with the conductive sheet, for example, may be made of a plate-like strip or a linear wire structure, preferably a plate-like strip structure Can be.
- the safety device when a strong external force that causes penetration or physical deformation by the needle body, current flows preferentially through the conductive sheets, causing an intentional short circuit, thereby reducing the energy flowing between the battery cells It can prevent fire and explosion and improve safety.
- the safety device according to the present invention can be electrically connected to the battery modules, it is possible to design freely to fit the size and capacity of the desired output. Accordingly, the present invention provides a battery pack having a structure for making an electrical connection using the safety device.
- the battery pack may have a structure in which a plurality of battery modules protruding the positive electrode terminal and the negative electrode terminal on the same surface. That is, by forming the positive and negative terminals on the same surface, the space generated by the protrusion of the electrode terminals can be reduced compared to the case where the positive and negative terminals are formed on different surfaces, so that the battery pack is more compact. can do.
- the battery module facing the safety device may be formed with a weak portion of the structure that is disconnected when the electrode terminal connection portion is destroyed when the battery cell is expanded.
- the battery module forms a weak structure against the volume expansion during swelling of the electrode terminal connecting portion of the battery cell, so that when the swelling volume reaches a predetermined value above a threshold, the expansion stress is concentrated on the electrode terminal connecting portion. It is induced to rupture by physical deformation. Due to this rupture of the electrode terminal connection part, the electrical connection inside the battery module is cut off and the charge / discharge process is stopped, thereby preventing the swelling volume of the battery cell or the unit module from further increasing, thereby preventing fire or explosion of the battery module. Can greatly improve the safety of the battery.
- the weak part may be a structure formed as a cutout in the cell cover of the battery module facing the safety device.
- the battery cells constitute a single battery module in a structure surrounded by a high strength cell cover made of synthetic resin or a metal material, and form a cutout in a desired shape on a part of the cell cover adjacent to the electrode terminal connection part, and then swell The expansion stress of the battery cell at the time of ring can be easily induced to concentrate to the cutout of the cell cover.
- the size of the cutout may vary depending on the conditions for setting the break of the electrode terminal connector. Preferably, when the battery cell swelling causes a volume increase of 2 to 5 times based on the thickness of the battery cell, the electrode terminal connector is ruptured. Can be set. This setting range may vary depending on the safety test specification of the desired battery module. However, if the size of the cutout is made too large, it may be difficult to achieve the essential function of supplementing the mechanical rigidity of the battery cell by the cell cover and suppressing the expansion of the battery cell under normal operating conditions. You need to set the size.
- the electrode terminals of the battery modules are preferably arranged on the same line
- the electrode terminal connecting device is mounted on the electrical connection portion of the electrode terminals, respectively, to maintain a safety distance from the outermost side of the battery module
- the device may be mounted.
- the separation distance may be 1 cm to 20 cm, preferably 3 cm to 10 cm, more preferably 3 cm to 7 cm.
- the separation distance When the separation distance is too narrow, it may not be easy to secure the distance of swelling due to overcharging. On the contrary, when the separation distance is too wide, the volume of the battery pack increases, which is not preferable.
- the present invention also provides a vehicle including the battery pack as a power source.
- the vehicle having the above structure can be used as an electric vehicle, a hybrid electric vehicle, or a plug-in hybrid electric vehicle in consideration of mounting efficiency, structural stability, etc. according to a desired power and capacity.
- FIG. 1 is a perspective view of a safety device according to one embodiment of the present invention.
- FIG. 2 is a schematic front view of the housing of FIG. 1; FIG.
- FIG. 3 is a perspective view of a battery pack according to another embodiment of the present invention.
- FIG. 4 is a perspective view of the battery module of FIG. 3.
- FIG. 1 is a perspective view schematically showing a safety device according to an embodiment of the present invention
- Figure 2 is a front schematic view of the housing of FIG.
- the safety member 100 includes a pair of conductive sheets 110 of copper material; An electrically insulating housing 120 having conductive sheets 110 inserted thereinto and surrounding the outer surface except the front surface; Sealing member 130 to cover the front; And a connection member 140 connecting the conductive sheets 110 to one of the positive and negative electrodes of the battery cells of the battery module 200.
- a pair of grooves 121 and 122 are formed on the inner upper and lower ends of the housing 120 so that the pair of conductive sheets 110 can be inserted in a spaced apart state.
- the protrusion 123 having a width w corresponding to the separation distance of the grooves 121 and 122 so that the conductive sheets 110 may be mounted and fixed in a spaced apart state. ) Is formed.
- the sealing member 130 is an electrically insulating material, and seals the opened front and opposite side portions in a '-' shape except for the side position through which the connecting member 140 passes to block the conductive sheet 110 from the outside. Doing.
- connection member 140 has a length for electrically connecting the positive electrode and the negative electrode of the conductive sheet 110 and the battery module, respectively, and has a plate-like strip structure.
- the housing 120 has a pair of grooves 125 are formed corresponding to the position connected to the connection member 140 and the conductive sheet 110 so that the connection member 140 can be mounted.
- FIG 3 is a perspective view schematically showing a battery pack according to another embodiment of the present invention
- Figure 4 is a perspective view of the battery module of Figure 3 schematically.
- the battery pack 300 has a structure in which a plurality of battery modules 200 having a positive electrode terminal and a negative electrode terminal are laminated on the same surface thereof, and the electrode of the battery module 200 is stacked.
- the terminals are all located on one side of the battery pack 300, and maintain a distance (d) of about 5 cm from the outermost battery module 202 and the safety device 100 is mounted.
- FIG. 4 schematically shows the battery module 202 of FIG. 2.
- the battery module 202 has a structure in which battery cells are wrapped with a cell cover, and the battery module facing the safety device 100 among the battery modules 200 ( A cutout 215 is formed in the cell cover 212 of 202.
- the electrode terminal connecting portion 214 protrudes to the cutout 215 and is disconnected, thereby causing electrical connection of the battery module 200. This is broken.
- the safety device according to the present invention is mounted on one side of the battery pack, and is preferentially short-circuited upon application of a strong external force that causes penetration of the needle body or physical deformation, thereby greatly improving safety.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Electrochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Sustainable Energy (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Aviation & Aerospace Engineering (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Battery Mounting, Suspending (AREA)
- Gas Exhaust Devices For Batteries (AREA)
Abstract
Description
Claims (18)
- 둘 이상의 전지셀 또는 하나 이상의 전지모듈을 포함하는 전지팩의 일측에 장착되어 침상체의 관통시 우선적으로 단락되어 안전성을 담보하는 장치로서,상호 이격되어 있는 한 쌍의 도전성 시트들;상기 도전성 시트들이 삽입 장착되고 전면을 제외한 외면을 감싸고 있는 전기절연성의 하우징;상기 전면을 커버하는 밀폐부재; 및상기 도전성 시트들을 전지모듈의 전지셀들 중 하나의 양극 및 음극에 각각 연결하는 접속부재;를 포함하는 것을 특징으로 하는 안전장치.
- 제 1 항에 있어서, 상기 도전성 시트는 금속 소재로 이루어진 것을 특징으로 하는 안전장치.
- 제 2 항에 있어서, 상기 도전성 시트는 구리, 알루미늄, 코발트, 크롬, 구리, 철, 마그네슘, 망간, 몰리브덴 및 니켈로 이루어진 군에서 선택되는 하나 이상의 소재 또는 이들의 둘 이상의 합금으로 이루어진 것을 특징으로 하는 안전장치.
- 제 1 항에 있어서, 상기 하우징의 내측 상단 및 하단에는 한 쌍의 도전성 시트가 이격된 상태로 삽입될 수 있도록, 각각 한 쌍의 그루브들이 형성되어 있는 것을 특징으로 하는 안전장치.
- 제 4 항에 있어서, 상기 그루브들 사이에는, 도전성 시트들이 이격된 상태로 장착 고정될 수 있도록, 그루브들의 이격 거리에 상응하는 폭의 돌기부가 형성되어 있는 것을 특징으로 하는 안전장치.
- 제 1 항에 있어서, 상기 밀폐부재는 상기 도전성 시트를 외부와 차단할 수 있도록 개방된 전면을 밀폐하는 것을 특징으로 하는 안전장치.
- 제 1 항에 있어서, 상기 접속부재는 상기 도전성 시트와 전지모듈의 양극과 음극을 각각 전기적으로 연결할 수 있는 길이를 가지는 것을 특징으로 하는 안전장치.
- 제 7 항에 있어서, 상기 하우징은 접속부재가 장착될 수 있도록, 상기 접속부재와 도전성 시트와 연결된 위치에 대응하여 한 쌍의 홈부가 형성되어 것을 특징으로 하는 안전장치.
- 제 1 항에 있어서, 상기 접속부재는 판상형의 스트립 또는 선형의 와이어 구조로 이루어진 것을 특징으로 하는 안전장치.
- 제 1 항 내지 제 9 항 중 어느 하나에 따른 안전장치를 사용하여 전기적 연결을 이룬 것을 특징으로 하는 전지팩.
- 제 10 항에 있어서, 상기 전지팩은 동일 면에 양극단자와 음극단자가 돌출되어 있는 전지모듈 다수 개를 충적시킨 구조로 이루어진 것을 특징으로 하는 전지팩.
- 제 11 항에 있어서, 안전장치가 대면하고 있는 전지모듈에는 전지셀의 팽창시 전극단자 연결부위가 파괴되면서 단전되는 구조의 취약부가 형성되어 있는 것을 특징으로 하는 전지팩.
- 제 12 항에 있어서, 상기 취약부는 안전장치가 대면하고 있는 전지모듈의 셀 커버에 절취부로 형성되어 있는 것을 특징으로 하는 전지모듈.
- 제 13 항에 있어서, 상기 절취부의 크기는, 전지셀 스웰링이 전지셀의 두께를 기준으로 2 내지 5배의 부피 증가를 초래할 때, 전극단자 연결부위가 파열되도록 설정되어 있는 것을 특징으로 하는 전지모듈.
- 제 11 항에 있어서, 상기 전지모듈들의 전극단자들은 동일 선상에 배열되어 있고, 상기 전극단자들의 전기적 접속부위에 전극단자 연결장치가 각각 장착되어 있으며, 상기 전지모듈의 최외측으로부터 이격 거리를 유지하며 안전장치가 장착되어 있는 것을 특징으로 하는 전지팩.
- 제 15 항에 있어서, 상기 이격 거리는 1 cm 내지 20 cm인 것을 특징으로 하는 전지팩.
- 제 10 항에 따른 전지팩을 전원으로 포함하는 것을 특징으로 하는 차량.
- 제 17 항에 있어서, 상기 차량은 전기자동차, 하이브리드 전기자동차, 또는 플러그-인 하이브리드 전기자동차인 것을 특징으로 하는 차량.
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CN201280026227.2A CN103563129B (zh) | 2011-06-08 | 2012-06-08 | 用于电池组的安全装置 |
JP2014511308A JP5700739B2 (ja) | 2011-06-08 | 2012-06-08 | 電池パック安全装置 |
EP12796274.4A EP2696398B1 (en) | 2011-06-08 | 2012-06-08 | Battery pack safety device |
US14/062,352 US9099733B2 (en) | 2011-06-08 | 2013-10-24 | Safety device for battery pack |
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KR1020110054931A KR101307386B1 (ko) | 2011-06-08 | 2011-06-08 | 전지팩 안전장치 |
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KR (1) | KR101307386B1 (ko) |
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CN112531298B (zh) * | 2020-12-02 | 2022-03-29 | 湖北平安电工科技股份公司 | 防护板板芯以及应用其的电池组防护板和车辆电池防护系统 |
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JP3419272B2 (ja) * | 1997-09-18 | 2003-06-23 | 株式会社デンソー | 電 池 |
JP2001068156A (ja) * | 1999-08-24 | 2001-03-16 | Hitachi Maxell Ltd | 積層形ポリマー電解質電池 |
JP2001068161A (ja) * | 1999-08-24 | 2001-03-16 | Hitachi Maxell Ltd | 積層形ポリマー電解質電池 |
JP2001297795A (ja) * | 2000-04-11 | 2001-10-26 | Mitsubishi Chemicals Corp | 電 池 |
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EP2590242B1 (en) * | 2004-12-24 | 2019-09-18 | LG Chem, Ltd. | Method and device for improving the performance of battery module by leveling voltage |
KR100720820B1 (ko) * | 2005-05-10 | 2007-05-22 | 주식회사 엘지화학 | 전압 레벨링에 의한 전지모듈 성능의 향상 방법 및 이를위한 병렬 접속장치 |
JP2007059170A (ja) * | 2005-08-24 | 2007-03-08 | Matsushita Electric Ind Co Ltd | 電池パック |
KR100866767B1 (ko) | 2006-07-10 | 2008-11-04 | 주식회사 엘지화학 | 이차전지용 안전부재 |
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JP4951547B2 (ja) * | 2008-02-14 | 2012-06-13 | ソニー株式会社 | 電池パック |
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JP2012182022A (ja) * | 2011-03-01 | 2012-09-20 | Hitachi Maxell Energy Ltd | バッテリーパック |
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KR101307386B1 (ko) | 2013-09-11 |
CN103563129B (zh) | 2015-11-25 |
US9099733B2 (en) | 2015-08-04 |
KR20120135988A (ko) | 2012-12-18 |
EP2696398B1 (en) | 2017-03-22 |
EP2696398A4 (en) | 2014-11-05 |
US20140050950A1 (en) | 2014-02-20 |
EP2696398A2 (en) | 2014-02-12 |
CN103563129A (zh) | 2014-02-05 |
WO2012169793A3 (ko) | 2013-02-21 |
JP2014517469A (ja) | 2014-07-17 |
JP5700739B2 (ja) | 2015-04-15 |
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