WO2023224384A1 - 각형 이차전지 - Google Patents
각형 이차전지 Download PDFInfo
- Publication number
- WO2023224384A1 WO2023224384A1 PCT/KR2023/006678 KR2023006678W WO2023224384A1 WO 2023224384 A1 WO2023224384 A1 WO 2023224384A1 KR 2023006678 W KR2023006678 W KR 2023006678W WO 2023224384 A1 WO2023224384 A1 WO 2023224384A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- secondary battery
- cooling unit
- case
- heat
- battery cell
- Prior art date
Links
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- 238000013022 venting Methods 0.000 claims abstract description 32
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- WABPQHHGFIMREM-AKLPVKDBSA-N lead-210 Chemical compound [210Pb] WABPQHHGFIMREM-AKLPVKDBSA-N 0.000 description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 3
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- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- 229920002873 Polyethylenimine Polymers 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
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- CYKDLUMZOVATFT-UHFFFAOYSA-N ethenyl acetate;prop-2-enoic acid Chemical compound OC(=O)C=C.CC(=O)OC=C CYKDLUMZOVATFT-UHFFFAOYSA-N 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
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- 150000004678 hydrides Chemical class 0.000 description 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
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- 239000007769 metal material Substances 0.000 description 1
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 description 1
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- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- 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
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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- H01M10/60—Heating or cooling; Temperature control
- H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
- H01M10/647—Prismatic or flat cells, e.g. pouch cells
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- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6553—Terminals or leads
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- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
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- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6569—Fluids undergoing a liquid-gas phase change or transition, e.g. evaporation or condensation
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- 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
- H01M50/211—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for pouch cells
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- 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
- H01M50/222—Inorganic material
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- 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
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- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/271—Lids or covers for the racks or secondary casings
- H01M50/273—Lids or covers for the racks or secondary casings characterised by the material
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- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/308—Detachable arrangements, e.g. detachable vent plugs or plug systems
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- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/342—Non-re-sealable arrangements
- H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
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- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
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- H01M50/394—Gas-pervious parts or elements
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- H—ELECTRICITY
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
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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
- H01M2200/00—Safety devices for primary or secondary batteries
- H01M2200/10—Temperature sensitive devices
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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
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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
- H01M50/30—Arrangements for facilitating escape of gases
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- 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 prismatic secondary battery that can suppress the heat propagation phenomenon in which other secondary batteries around it continuously overheat when thermal runaway occurs.
- secondary batteries can be recharged and have been extensively researched and developed in recent years due to their small size and high capacity.
- Secondary batteries are classified into coin-shaped batteries, cylindrical batteries, square-shaped batteries, and pouch-shaped batteries, depending on the shape of the battery case.
- the electrode assembly mounted inside the battery case in a secondary battery is a power generating element capable of charging and discharging consisting of a stacked structure of electrodes and a separator.
- Patent Document 1 Korean Patent No. 10-1270796 (announced on June 5, 2013)
- the purpose of the present invention is to provide a secondary battery that can effectively suppress and prevent heat propagation due to thermal runaway occurring in the secondary battery.
- the present invention relates to a prismatic secondary battery, and in one example, a case made of metal, at least one battery cell accommodated in the case, a cooling unit disposed on at least one side of the case, and the cooling unit is fixed and the battery It includes a fixed body with a venting hole formed to guide the gas generated in the cell and passing through the cooling unit to the outside of the case.
- the cooling unit includes an absorbent material impregnated with a liquid that is vaporized by heat generated from the battery cell, and a heat-conducting body having an insertion hole into which the absorbent material is inserted.
- the absorbent material is a superabsorbent matrix
- the superabsorbent matrix may include superabsorbent polymer (SAP) or superabsorbent fiber (SAF).
- the liquid impregnated in the absorbent material may be water.
- the cooling unit may include a cover that is joined to the front and rear of the heat-conducting body in the flow direction of the gas generated in the battery cell and moves to the venting hole, and melted by the heat of the gas.
- the battery cell is a pouch-type battery cell with an electrode lead protruding to the outside, and the electrode lead may protrude in one direction of the case where the cooling unit is disposed.
- the prismatic secondary battery of the present invention may include a side case coupled to one end of the case and covering the fixed body, and a bus bar provided between the fixed body and the side case and electrically connected to the electrode lead. there is.
- a bus bar hole is formed in the bus bar that communicates with the venting hole and is open toward the outside of the side case.
- the cooling unit is disposed on at least one of the front and rear of the heat-conducting body with respect to the flow direction of the gas generated in the battery cell and moving to the venting hole, and is disposed on the gas.
- a filter that filters particles of a certain size or larger.
- venting hole of the fixed body may be provided with an end filter that filters particles of a predetermined size or larger contained in the gas that has passed through the cooling unit.
- the end filter may be broken or separated from the venting hole when a pressure exceeding a predetermined value is applied.
- the prismatic secondary battery of the present invention having the above configuration, high-temperature gases and particles generated by thermal runaway phenomenon are discharged to the outside through a cooling unit containing a cooling liquid. Therefore, the prismatic secondary battery of the present invention greatly reduces the risk of heat propagation by discharging the high-temperature ignition source emitted from the overheated battery cell after it is cooled inside the case.
- the rectangular secondary battery can effectively suppress the risk of external fire caused by the ignition source of high-temperature particles by installing a filter that filters out particles exceeding a certain size in the cooling unit and venting hole.
- FIG. 1 is a perspective view of a prismatic secondary battery according to an embodiment of the present invention.
- Figure 2 is an exploded perspective view of the square secondary battery of Figure 1.
- FIG. 3 is a diagram illustrating a cooling unit included in the square secondary battery of FIG. 1.
- Figure 4 is a diagram showing the cooling action of the cooling unit in a thermal runaway state.
- FIG. 5 is a diagram showing a cooling unit in another embodiment of the present invention.
- Figure 6 is a diagram showing an end filter provided in a venting hole in another embodiment of the present invention.
- Figure 7 is a side perspective view showing a venting hole equipped with a cooling unit and an end filter.
- Figure 8 is a diagram showing a structure in which an end filter can be separated due to excessive internal pressure.
- the gig-type secondary battery of the present invention includes a case made of metal, at least one battery cell accommodated in the case, a cooling unit disposed on at least one side of the case, And it includes a fixed body in which a venting hole is formed to secure the cooling unit and guide gas generated from the battery cell and passing through the cooling unit to the outside of the case.
- the cooling unit includes an absorbent material impregnated with a liquid that is vaporized by heat generated from the battery cell, and a heat-conducting body having an insertion hole into which the absorbent material is inserted.
- FIG. 1 is a perspective view of a prismatic secondary battery 10 according to an embodiment of the present invention
- FIG. 2 is an exploded perspective view of the prismatic secondary battery 10 of FIG. 1 .
- the square secondary battery 10 of the present invention includes a case made of metal and at least one battery cell 200 accommodated in the case.
- the battery cell 200 in the illustrated embodiment is a pouch-type battery cell 200 with a bi-directional terminal in which electrode leads 210 each protrude on both sides in the width direction, and is comprised of two pouch-type battery cells. (200) is stored in the case.
- Cases can be made by extruding metal materials such as aluminum, stainless steel, or alloys containing them.
- the case in consideration of the easy storage of the battery cells 200 and the cost of extrusion molding, the case is coupled to the main case 110, which has a cross-section in the shape of the lowercase letter "n" of the English alphabet, and the lower opening. It consists of a lower plate 130.
- the prismatic secondary battery 10 of the present invention includes a cooling unit 300 disposed on at least one side of the case, and a fixing body 400 that fixes the cooling unit 300 to the case.
- the cooling unit 300 is used to cool the high-temperature gas generated from the battery cell 200, which is overheated due to thermal runaway, to below the ignition temperature before discharging it to the outside.
- the cooling unit 300 operates in an emergency situation where high-temperature gas occurs due to thermal runaway, and must fully maintain the cooling function in normal conditions.
- the cooling unit 300 includes an absorbent material 310 impregnated with a liquid that is vaporized by the heat generated from the battery cell 200, and a heat-conducting body 320 formed with an insertion hole 322 into which the absorbent material 310 is inserted.
- the heat-conducting body 320 which embeds the absorber 310 in the insertion hole 322, is a structure that supports the absorber 310 and at the same time serves to dissipate heat absorbed by the absorber 310 to the surroundings. As the heat-conducting body 320 radiates heat to the surroundings, the time for the liquid in the absorber 310 to vaporize is delayed, and thus the heat absorption effect of the liquid lasts for a long time.
- the fixed body 400 serves to fix the cooling unit 300 to the case, and has a venting hole 410 that guides the gas generated from the battery cell 200 and passed through the cooling unit 300 to the outside of the case. It is equipped with The front and rear of the cooling unit 300 fixed to the fixed body 400 (based on the flow direction of the high-temperature gas) are not blocked, and the rear and venting holes of the cooling unit 300 that enter the inside of the fixed body 400 ( 410) There is a gap between them so the flow of gas is not interrupted.
- the absorbent material 310 is an absorbent material 310 comprising a superabsorbent matrix, for example, Super Absorbent Polymer (SAP) or Super Absorbent Fiber (SAF). You can.
- the highly absorbent matrix is porous or fibrous and can absorb a large amount of liquid by exhibiting capillary action, and the superabsorbent fiber can be manufactured in the form of a fiber such as a non-woven fabric by processing a superabsorbent polymer.
- the specific type of the superabsorbent polymer and the superabsorbent fiber produced therefrom is not particularly limited, and any type that has an excellent absorption ability for fluid, especially water, can be used without limitation.
- examples of superabsorbent polymers include polyacrylic acid, polyacrylate, polyacrylate graft polymer, starch, cross-linked carboxymethylated cellulose, acrylic acid copolymer, hydrolyzed starch-acrylnitrile graft copolymer, and starch-acrylic acid graft.
- Copolymer saponified vinyl acetate-acrylic acid ester copolymer, hydrolyzed acrylonitrile copolymer, hydrolyzed acrylamide copolymer, ethylene-maleic anhydride copolymer, isobutylene-maleic anhydride copolymer, polyvinylsulfonic acid , polyvinylphosphonic acid, polyvinyl phosphoric acid, polyvinyl sulfate, sulfonated polystyrene, polyvinylamine, polydialkylaminoalkyl (meth)acrylamide, polyethyleneimine, polyallylamine, polyallylguanidine, polydimethyldiallylammonium hydride.
- One or more selected from the group consisting of salts, crosslinked polyacrylic acid, and crosslinked acrylic acid hollow polymers may be included, but are not limited thereto.
- the type of acrylic acid copolymer used as the superabsorbent polymer in the present invention is not particularly limited, but is preferably acrylic acid monomer and maleic acid, itaconic acid, acrylamide, 2-acrylamide-2-methylpropanesulfonic acid, 2-(meth ) It may be a copolymer containing one or more comonomers selected from the group consisting of acryloylethanesulfonic acid, 2-hydroxyethyl (meth)acrylate, and styrenesulfonic acid.
- the superabsorbent polymer may have a water absorption amount of 10 g/g to 500 g/g, preferably 50 g/g to 200 g/g, but is not limited thereto. That is, 10 g to 500 g of water, preferably 50 g to 200 g, can be absorbed per 1 g of superabsorbent polymer.
- the greater the amount of water absorbed by the superabsorbent polymer the longer the cooling effect can be improved.
- it exceeds 500 g/g the fluidity of the superabsorbent polymer increases and it is difficult to maintain its shape, making effective cooling impossible.
- it is less than 10 g/g the duration of the cooling effect may be too short and ineffective.
- the liquid impregnated in the absorbent material 310 may be water.
- Water is the substance with the greatest sensible and latent heat among readily available liquids. Therefore, the water contained in the absorbent material 310 is suitable for application to the cooling unit 300 of the present invention because it absorbs a large amount of heat during the phase change process from the liquid state to gas.
- the cooling unit 300 is a cover attached to the front and rear of the heat-conducting body 320 with respect to the flow direction of the gas generated in the battery cell 200 and moving to the venting hole 410 of the fixed body 400.
- 330 may be included.
- the cover 330 is a membrane member to prevent the liquid impregnated in the absorbent material 310 from being lost through natural evaporation, and is melted by the heat of the gas flowing into the cooling unit 300 to expose the absorbent material 310 at an appropriate time. I do it.
- the electrode lead 210 of the battery cell 200 may protrude toward one side of the case where the cooling unit 300 is disposed. Since the electrode lead 210 is a part where current is concentrated and overheating is likely to occur, arranging the electrode lead 210 to face the cooling unit 300 has an advantage in that cooling and discharge of high-temperature gas occurs immediately. .
- the prismatic secondary battery 10 of the present invention includes a side case 120 that is coupled to one end of the case, that is, the side of the main case 110 and covers the fixed body 400, the fixed body 400, and the side case 120. ) may include a bus bar 500 provided between the.
- the bus bar 500 is a component electrically connected to the electrode lead 210, and a portion of it is exposed to the outside through a cut in the side case 120.
- the bus bar 500 When the bus bar 500 is placed in the side case 120, the bus bar 500 may block the venting hole 410 of the fixed body 400.
- a bus bar hole 510 that communicates with the venting hole 410 and is open to the outside of the side case 120 is formed in the bus bar 500.
- FIG. 5 is a diagram showing the cooling unit 300 in the second embodiment of the present invention
- Figure 6 is a state in which the end filter 420 is provided in the venting hole 410 in the second embodiment of the present invention. This is a drawing showing.
- the second embodiment of the present invention prevents particles contained in high-temperature gas from being discharged to the outside by installing a filter means inside the square secondary battery 10. Particles of a certain size or larger that are not sufficiently cooled even after passing through the cooling unit 300 may become a high-temperature ignition source and cause an external fire.
- the second embodiment of the present invention reduces the risk of fire caused by such high-temperature particles.
- the second embodiment includes at least one of two filter means.
- the cooling unit 300 is disposed on at least one of the front and rear sides of the heat-conducting body 320 with respect to the flow direction of the gas generated in the battery cell 200 and moving to the venting hole 410, and is included in the gas. It includes a filter 340 that filters particles of a predetermined size or larger.
- the filter 340 is installed in front and/or behind the heat-conducting body 320 and filters particles in the gas flowing into and out of the cooling unit 300.
- the filter 340 may be integrally laminated with a membrane member to prevent loss of the liquid impregnated in the absorbent material 310, and the membrane member, like the cover 330 described above, is resistant to heat from the gas. It can be melted and removed.
- an end filter 420 that filters particles of a predetermined size or larger contained in the gas that has passed through the cooling unit 300 may be provided in the venting hole 410 of the fixed body 400.
- the cooling unit 300 is provided with a filter 340
- the end filter 420 of the venting hole 410 serves to secondary filter particles.
- the filter 340 of the cooling unit 300 and the end filter 420 of the venting hole 410 may be designed so that the sizes of particles they filter are different. there is.
- the filter 340 of the cooling unit 300 which has a relatively large area, can be configured to filter particles of relatively smaller size.
- FIG. 7 is a side perspective view showing the cooling unit 300 and the venting hole 410 provided with the end filter 420.
- the embodiment of FIG. 7 shows the filter 340 and the venting hole 410 of the cooling unit 300.
- Figure 7 shows the state in which the end filter 420 is fully equipped.
- Figure 7 shows a heat absorbing pouch 600 interposed between two pouch-type battery cells 200.
- the heat absorbing pouch 600 has an absorbent material that is the same or similar to the absorbent material 310 provided in the cooling unit 300 built into the pouch, and generates a heat absorbing action by directly contacting the battery cell 200.
- the heat absorbing pouch 600 may have weak portions with local low strength (joint strength, tensile strength, etc.). The liquid in the absorbent absorbs heat and is evaporated, and the weak part is broken by the internal pressure raised by the gas, causing a strong cooling and/or extinguishing effect by spewing out high-pressure gas.
- the end filter 420 may be broken, or the end filter 420 may be separated from the venting hole 410. . If the end filter 420, which has a relatively narrow filtering area, is clogged, the structure of the square secondary battery 10 may collapse as the pressure inside the case rises beyond the limit.
- FIG. 8 is a diagram illustrating a structure in which the end filter 420 can be separated due to excessive internal pressure.
- venting hole 420 end filter
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Abstract
Description
Claims (13)
- 금속 재질의 케이스;상기 케이스 내에 수용된 적어도 하나 이상의 전지 셀;상기 케이스의 적어도 일측에 배치된 쿨링부; 및상기 쿨링부를 고정시키고, 상기 전지 셀에서 발생하여 상기 쿨링부를 통과한 가스를 상기 케이스의 외부로 안내하는 벤팅 홀이 형성된 고정 바디;를 포함하는 각형 이차전지.
- 제1항에 있어서,상기 쿨링부는,상기 전지 셀에서 발생하는 열에 의해 기화되는 액체가 함침된 흡수재; 및상기 흡수재가 삽입되는 삽입홀이 형성된 열전도 바디;를 포함하는 각형 이차전지.
- 제2항에 있어서,상기 흡수재는,고흡수성 매트릭스인 것을 특징으로 하는 각형 이차전지.
- 제3항에 있어서,상기 고흡수성 매트릭스는 고흡수성 폴리머(SAP) 또는 고흡수성 섬유(SAF)를 포함하는 것을 특징으로 하는 각형 이차전지.
- 제4항에 있어서,상기 액체는 물인 것을 특징으로 하는 각형 이차전지.
- 제1항에 있어서,상기 쿨링부는,상기 전지 셀에서 발생하여 상기 벤팅 홀로 이동하는 가스의 유동방향에 대해 상기 열전도 바디의 전방 및 후방에 접합되고, 상기 가스의 열에 의해 용융되는 커버를 포함하는 각형 이차전지.
- 제1항에 있어서,상기 전지 셀은,전극 리드가 외부로 돌출된 파우치형 전지 셀인 것을 특징으로 하는 각형 이차전지.
- 제7항에 있어서,상기 전극 리드는,상기 쿨링부가 배치된 상기 케이스의 일측 방향으로 돌출된 것을 특징으로 하는 각형 이차전지.
- 제8항에 있어서,상기 케이스의 일측 단부에 결합되며, 상기 고정 바디를 덮는 사이드 케이스; 및상기 고정 바디와 상기 사이드 케이스의 사이에 구비되고, 상기 전극 리드와 전기적으로 연결된 버스바;를 포함하는 각형 이차전지.
- 제9항에 있어서,상기 버스바에는 상기 벤팅 홀과 연통되어 상기 사이드 케이스의 외부를 향해 개방된 버스바 홀이 형성된 것을 특징으로 하는 각형 이차전지.
- 제1항에 있어서,상기 쿨링부는,상기 전지 셀에서 발생하여 상기 벤팅 홀로 이동하는 가스의 유동방향에 대해 상기 열전도 바디의 전방과 후방 중 적어도 어느 한 쪽에 배치되고, 상기 가스에 포함된 소정 크기 이상의 파티클을 여과하는 필터를 포함하는 각형 이차전지.
- 제11항에 있어서,상기 고정 바디의 벤팅 홀에는,상기 쿨링부를 통과한 가스에 포함된 소정 크기 이상의 파티클을 여과하는 엔드 필터가 구비된 각형 이차전지.
- 제12항에 있어서,상기 엔드 필터는,사전에 정해진 값을 초과하는 압력이 작용하면 파단되거나 또는 상기 벤팅 홀에서 분리되는 것을 특징으로 하는 각형 이차전지.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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EP23807903.2A EP4336626A1 (en) | 2022-05-20 | 2023-05-17 | Prismatic secondary battery |
CN202380012391.6A CN117501516A (zh) | 2022-05-20 | 2023-05-17 | 棱柱形二次电池 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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KR10-2022-0061752 | 2022-05-20 | ||
KR1020220061752A KR20230162850A (ko) | 2022-05-20 | 2022-05-20 | 각형 이차전지 |
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WO2023224384A1 true WO2023224384A1 (ko) | 2023-11-23 |
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PCT/KR2023/006678 WO2023224384A1 (ko) | 2022-05-20 | 2023-05-17 | 각형 이차전지 |
Country Status (4)
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EP (1) | EP4336626A1 (ko) |
KR (1) | KR20230162850A (ko) |
CN (1) | CN117501516A (ko) |
WO (1) | WO2023224384A1 (ko) |
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KR101270796B1 (ko) | 2011-06-20 | 2013-06-05 | 세방전지(주) | 안전장치가 구비된 배터리 |
KR20150031611A (ko) * | 2013-09-16 | 2015-03-25 | 주식회사 엘지화학 | 가스의 선택적 투과를 위한 벤팅 부재를 포함하고 있는 전지팩 |
KR20180006150A (ko) * | 2016-07-08 | 2018-01-17 | 주식회사 엘지화학 | 안전성이 개선된 셀 모듈 어셈블리 및 이를 위한 팩 구조물 |
KR20180017695A (ko) * | 2016-08-10 | 2018-02-21 | 주식회사 엘지화학 | 냉각 구조가 개선된 배터리 팩 |
EP3493295A1 (en) * | 2017-12-04 | 2019-06-05 | Kabushiki Kaisha Toshiba | Battery |
US10629869B2 (en) * | 2015-10-28 | 2020-04-21 | Murata Manufacturing Co., Ltd. | Electronic apparatus case and battery pack including the same |
KR20220061752A (ko) | 2020-11-06 | 2022-05-13 | 삼성전자주식회사 | 플렉서블 디스플레이를 제어하는 방법 및 전자 장치 |
-
2022
- 2022-05-20 KR KR1020220061752A patent/KR20230162850A/ko unknown
-
2023
- 2023-05-17 EP EP23807903.2A patent/EP4336626A1/en active Pending
- 2023-05-17 CN CN202380012391.6A patent/CN117501516A/zh active Pending
- 2023-05-17 WO PCT/KR2023/006678 patent/WO2023224384A1/ko active Application Filing
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
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KR101270796B1 (ko) | 2011-06-20 | 2013-06-05 | 세방전지(주) | 안전장치가 구비된 배터리 |
KR20150031611A (ko) * | 2013-09-16 | 2015-03-25 | 주식회사 엘지화학 | 가스의 선택적 투과를 위한 벤팅 부재를 포함하고 있는 전지팩 |
US10629869B2 (en) * | 2015-10-28 | 2020-04-21 | Murata Manufacturing Co., Ltd. | Electronic apparatus case and battery pack including the same |
KR20180006150A (ko) * | 2016-07-08 | 2018-01-17 | 주식회사 엘지화학 | 안전성이 개선된 셀 모듈 어셈블리 및 이를 위한 팩 구조물 |
KR20180017695A (ko) * | 2016-08-10 | 2018-02-21 | 주식회사 엘지화학 | 냉각 구조가 개선된 배터리 팩 |
EP3493295A1 (en) * | 2017-12-04 | 2019-06-05 | Kabushiki Kaisha Toshiba | Battery |
KR20220061752A (ko) | 2020-11-06 | 2022-05-13 | 삼성전자주식회사 | 플렉서블 디스플레이를 제어하는 방법 및 전자 장치 |
Also Published As
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EP4336626A1 (en) | 2024-03-13 |
KR20230162850A (ko) | 2023-11-29 |
CN117501516A (zh) | 2024-02-02 |
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