WO2023121260A1 - 안전성이 향상된 배터리 팩 - Google Patents
안전성이 향상된 배터리 팩 Download PDFInfo
- Publication number
- WO2023121260A1 WO2023121260A1 PCT/KR2022/020891 KR2022020891W WO2023121260A1 WO 2023121260 A1 WO2023121260 A1 WO 2023121260A1 KR 2022020891 W KR2022020891 W KR 2022020891W WO 2023121260 A1 WO2023121260 A1 WO 2023121260A1
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- WO
- WIPO (PCT)
- Prior art keywords
- fire extinguishing
- tank
- cover
- battery pack
- extinguishing tank
- Prior art date
Links
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- 230000008859 change Effects 0.000 claims abstract description 18
- 239000012530 fluid Substances 0.000 claims description 74
- 230000007423 decrease Effects 0.000 claims description 14
- 238000004146 energy storage Methods 0.000 claims description 12
- 238000012423 maintenance Methods 0.000 abstract description 6
- 239000007789 gas Substances 0.000 description 45
- 230000001079 digestive effect Effects 0.000 description 43
- 238000013022 venting Methods 0.000 description 25
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- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
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Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/16—Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C35/00—Permanently-installed equipment
- A62C35/02—Permanently-installed equipment with containers for delivering the extinguishing substance
-
- 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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
-
- 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
- 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
-
- 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
- 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
-
- 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
- H01M50/383—Flame arresting or ignition-preventing means
-
- 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
- H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
- H01M50/673—Containers for storing liquids; Delivery conduits therefor
-
- 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
Definitions
- the present invention relates to a battery, and more particularly, to a battery pack having improved safety and durability, and an energy storage system including the same.
- a lithium secondary battery mainly use lithium-based oxides and carbon materials as positive electrode active materials and negative electrode active materials, respectively.
- a lithium secondary battery includes an electrode assembly in which a positive electrode plate and a negative electrode plate coated with such a positive electrode active material and a negative electrode active material are disposed with a separator therebetween, and an exterior material that seals and houses the electrode assembly together with an electrolyte, that is, a battery case.
- lithium secondary batteries can be classified into a can-type secondary battery in which an electrode assembly is embedded in a metal can and a pouch-type secondary battery in which an electrode assembly is embedded in a pouch of an aluminum laminate sheet, depending on the shape of an exterior material.
- a plurality of battery cells are included in various battery packs, including those used in such residential ESSs, to increase capacity and/or output.
- a plurality of battery cells are often arranged in a dense state in a very narrow space.
- one of the typically important issues is safety.
- a thermal event occurs in one battery cell among a plurality of battery cells included in a battery pack
- propagation of the event to other battery cells needs to be suppressed.
- a venting gas may be ejected from a battery cell in which thermal runaway occurs, and the venting gas may cause thermal runaway of other battery cells, resulting in thermal propagation.
- a thermal event of a specific battery cell is not properly suppressed, this causes a chain of events in several battery cells included in the battery pack, which may cause a bigger problem such as ignition or explosion of the entire battery pack.
- ignition or explosion generated in the battery pack may cause great damage to nearby lives or property.
- a thermal event generated in a battery cell included in a battery pack needs to be quickly and effectively suppressed.
- a typical method is to suppress fire or heat using a fire extinguishing fluid.
- the extinguishing fluid may be stored in a sealed storage space (tank), and the state of the extinguishing fluid may change depending on various circumstances, such as the installation environment of the battery pack or the type of liquid.
- the battery pack is installed outdoors, in situations where the outdoor temperature is low, such as in an arctic region or winter, there is a possibility that the fire extinguishing fluid freezes.
- the pressure inside the tank changes, and there is a possibility that the tank may be damaged or damage such as cracks may occur.
- the tank may be configured in a sealed state, and due to this sealing, a problem in that the digestive fluid is not smoothly discharged to the outside of the tank may occur.
- the extinguishing fluid is reduced inside the tank due to fire suppression or evaporation, maintenance such as replenishment of the extinguishing fluid needs to be well performed.
- an object of the present invention is to provide a battery pack that is advantageous in maintenance and management together with effective control of thermal events.
- a battery pack according to an aspect of the present invention for achieving the above object includes a battery module including one or more battery cells; a fire extinguishing tank holding a fire extinguishing liquid, disposed above the battery module and having a through hole; and a cover member installed in the through hole of the fire extinguishing tank and configured to open or close the through hole according to a change in internal pressure of the fire extinguishing tank.
- the fire extinguishing tank may be configured to be ruptured under a predetermined condition, and may include an rupture member configured to allow the outflow of the extinguishing liquid when ruptured.
- the battery pack according to the present invention may further include a control module connected to the battery module and configured to manage the battery module, and the fire extinguishing tank may be mounted between the battery module and the control module.
- cover member may be configured to perform an opening and closing operation in a direction compensating for a pressure change inside the fire extinguishing tank.
- the cover member may have a first cover configured to be opened when the pressure inside the fire extinguishing tank increases.
- first cover may be configured to be openable in an outward direction.
- the fire extinguishing tank includes an inner tank for holding the fire extinguishing liquid in an inner space, and an outer tank at least partially surrounding an outer side of the inner tank, and the first cover may be mounted on the outer tank.
- the first cover may be located on the side of the fire extinguishing tank.
- cover member may have a second cover configured to be opened when the pressure inside the fire extinguishing tank decreases.
- the second cover may be configured to be openable in an inward direction.
- the fire extinguishing tank includes an inner tank for holding the fire extinguishing liquid in an inner space, and an outer tank at least partially surrounding an outer side of the inner tank, and the second cover may be mounted on the inner tank.
- the second cover may be located on the upper side of the fire extinguishing tank.
- the cover member may be configured to switch from an open state to a closed state when a pressure difference between the pressure inside the fire tank and the external air pressure falls within a certain level.
- an energy storage system for achieving the above object includes a battery pack according to the present invention.
- a battery pack with improved safety may be provided.
- a thermal event such as a thermal runaway situation occurs in a battery cell or the like
- the propagation of the thermal runaway situation is prevented through the injection of a fire extinguishing liquid, thereby causing a larger problem such as fire or explosion. can reduce the likelihood of occurrence.
- the extinguishing fluid when the extinguishing fluid is discharged from the inside of the extinguishing tank to the battery cell, the extinguishing fluid can be smoothly discharged.
- the durability of the components in which the digestive fluid is stored can be improved.
- the fire extinguishing tank can be prevented from being damaged or damaged even in a situation where the fire extinguishing fluid is frozen.
- a battery pack particularly a fire extinguishing tank
- maintenance of a battery pack may be convenient and advantageous in cost reduction.
- FIG. 1 is a perspective view showing the configuration of a battery pack according to an embodiment of the present invention.
- FIG. 2 is an exploded perspective view of the configuration of FIG. 1 .
- FIG. 3 is an enlarged view of portion A1 in FIG. 2 .
- FIG. 4 is a perspective view of a configuration of a fire extinguishing tank viewed from the bottom according to an embodiment of the present invention.
- FIG. 5 is a perspective view showing a fire extinguishing tank according to an embodiment of the present invention in isolation.
- FIG. 6 is an enlarged cross-sectional view of a portion of a fire extinguishing tank according to an embodiment of the present invention.
- FIG. 7 is a schematic diagram showing an example of a configuration for injecting a digestive fluid into a battery pack according to an embodiment of the present invention.
- FIG. 8 is an enlarged cross-sectional view of another portion of a fire extinguishing tank according to an embodiment of the present invention.
- FIG. 1 is a perspective view showing the configuration of a battery pack according to an embodiment of the present invention.
- FIG. 2 is an exploded perspective view of the configuration of FIG. 1
- FIG. 3 is an enlarged view of portion A1 of FIG. 2 .
- the battery pack according to the present invention includes a battery module 100, a fire extinguishing tank 200, and a cover member 300.
- the battery module 100 may include one or more battery cells.
- each battery cell may mean a secondary battery.
- a secondary battery may include an electrode assembly, an electrolyte, and a battery case.
- the battery cells included in the battery module 100 may be pouch-type secondary batteries.
- other types of secondary batteries such as cylindrical batteries or prismatic batteries, may also be employed in the battery module 100 of the present invention.
- the battery module 100 may include a module case for accommodating battery cells.
- the module case may have an empty space therein so that a plurality of battery cells may be accommodated in the empty space.
- the module case as shown in FIG. 1, may be formed in a substantially rectangular parallelepiped shape and erected in a vertical direction (Z-axis direction) perpendicular to the ground.
- the fire extinguishing tank 200 may hold fire extinguishing fluid, that is, fire extinguishing agent in a liquid state.
- fire extinguishing fluid various substances capable of suppressing or suppressing fire or lowering the temperature may be employed.
- the digestive fluid may be water or a liquid containing water.
- the fire extinguishing tank 200 may include a tank housing for holding such fire extinguishing fluid in an internal space.
- the fire extinguishing tank 200 may be disposed above the battery module 100.
- the fire extinguishing tank 200 may be configured to be detachable.
- the tank housing of the fire extinguishing tank 200 may be configured to be mounted on and detached from the top of the module case of the battery module 100 .
- the fire extinguishing tank 200 may be formed with a through hole.
- This through hole H may be configured to communicate between the internal space and the external space of the fire extinguishing tank 200.
- the through hole H may be located at a higher position than the water level of the digestive fluid stored in the internal space of the digestive tank 200.
- the cover member 300 may be installed in the through hole H of the fire extinguishing tank 200. Also, the cover member 300 may be configured to open or close the through hole H of the fire extinguishing tank 200.
- the cover member 300 is hinged at a portion indicated by I in FIG. 3, and the through hole H of the fire extinguishing tank 200 can be opened and closed through hinge rotation. That is, as shown in FIG. 3, in a state in which one end of the cover member 300 is attached to the fire extinguishing tank 200 in a hinged manner, the other end is separated from the through hole H in the direction indicated by arrow B1 By doing so, it is possible to open the through hole (H).
- the cover member 300 may close the through hole H by rotating in the opposite direction of the arrow B1 in FIG. 3 so that the other end covers the through hole H.
- a sealing material such as rubber or silicon may be provided in a portion of the cover member 300 that closes the through hole H in order to secure sealing property.
- the cover member 300 may also be located at a higher level than the water surface of the digestive fluid.
- the cover member 300 may be configured to open and close the through hole H according to a change in internal pressure of the fire extinguishing tank 200. That is, the cover member 300 may be configured to be automatically opened and closed when the internal pressure of the fire extinguishing tank 200 is higher or lower than a predetermined pressure. In addition, the cover member 300 may be configured to be opened and closed manually in addition to automatically.
- the safety of the battery pack can be greatly improved by the fire extinguishing tank 200 located on the upper side of the battery module 100.
- the fire may be suppressed or the fire may be extinguished through the extinguishing liquid.
- a thermal runaway situation or an overheating situation may be prevented. Therefore, it is possible to prevent an increase in risk of fire or explosion to other parts outside the battery pack due to an abnormal situation such as a fire or overheating situation of the battery pack.
- the injection of digestive fluid can be made more smoothly.
- the cover member 300 is automatically opened and closed according to the change in internal pressure, so that breakage or damage due to the change in internal pressure of the fire extinguishing tank 200 can be prevented. Accordingly, durability of the fire extinguishing tank 200 and the battery pack including the same can be greatly improved.
- the fire extinguishing tank 200 may be configured such that the fire extinguishing fluid freely falls toward the battery module 100.
- the fire extinguishing tank 200 is located on the upper side of the battery module 100, a separate power source is not required to move the fire extinguishing fluid to the battery module 100 side, and the fire extinguishing fluid can be quickly injected.
- the extinguishing fluid is injected into the battery module 100, and this injection process may be performed naturally in a free fall manner. Therefore, according to this embodiment of the present invention, it is possible to efficiently thermally control a battery cell whose temperature has risen due to thermal runaway or the like.
- the fire extinguishing tank 200 may include a tearing member 210. This will be described in more detail with further reference to FIG. 4 .
- Figure 4 is a perspective view of the configuration of the fire extinguishing tank 200 according to an embodiment of the present invention viewed from the bottom.
- a rupture member 210 may be provided under the fire extinguishing tank 200. This rupturable member 210 may be ruptured under certain conditions. And, when the rupture member 210 ruptures, it may be configured to allow the outflow of digestive fluid.
- the rupture member 210 may be configured to communicate with the inner space of the fire extinguishing tank 200.
- the fire extinguishing tank 200 may be formed in a substantially sealed form, and an input hole may be formed.
- the rupture member 210 may be inserted into the input hole to close the input hole.
- the input hole is opened, and the extinguishing liquid contained in the extinguishing tank 200 may be discharged to the outside.
- the fire extinguishing fluid may be injected into the battery module 100 in a free fall manner.
- At least one rupture member 210 may be provided in one fire extinguishing tank 200 .
- four rupture members 210 may be provided in one fire extinguishing tank 200 .
- the rupturable member 210 may be configured to be broken by conditions such as temperature or pressure.
- the rupturable member 210 may be configured to rupture under conditions of a certain temperature or higher and/or a certain pressure or higher.
- the rupture member 210 may be configured to be ruptured by venting gas. That is, when an event such as thermal runaway occurs in the battery module 100 , venting gas may be generated and discharged from the battery module 100 .
- the rupture member 210 may be formed of a material or shape capable of being ruptured by heat or pressure of the venting gas.
- the rupture member 210 may be implemented as a glass bulb.
- an input hole may be formed in the fire extinguishing tank 200, and the glass bulb may be inserted into and fastened to the input hole.
- the glass bulb may be damaged when in contact with the venting gas, so that the fire extinguishing fluid inside the fire extinguishing tank 200 is ejected to the outside, particularly to the battery module 100 side.
- the fire extinguishing tank 200 and the battery pack including the fire extinguishing tank 200 are simply configured, and the fire extinguishing liquid is injected into the battery module 100 side more smoothly.
- a configuration in which the rupture member 210 is ruptured by the venting gas generated from the battery module 100 can be more easily provided.
- the rupturable member 210 may be implemented in various materials or shapes capable of rupturing according to changes in conditions such as heat or pressure.
- the rupture member 210 may be implemented in the form of a vinyl material or an injection molding product.
- An opening may be formed in the battery module 100 to communicate with an internal space.
- the battery module 100 may have an opening formed at an upper end thereof. Also, these openings O1 may communicate with the inner space of the module case where the battery cells are located.
- the rupture member 210 may be inserted into the opening O1 of the battery module 100 .
- the rupturable member 210 may be inserted into the inner space of the battery module 100 through the opening O1.
- the digestive fluid can easily flow into the inner space of the battery module 100 . Accordingly, it is possible to more effectively respond to thermal events occurring inside the battery module 100, such as thermal runaway, gas ejection, fire, and the like. Furthermore, a battery cell that is a direct target of a thermal event may be located in the inner space of the battery module 100 . Therefore, according to the above embodiment, the extinguishing fluid may be directly injected into the battery cells. Therefore, it can be more advantageous for suppression or prevention of fire or the like.
- the rupturable member 210 such as a glass bulb can more quickly respond to the venting gas. That is, when venting gas is generated in the inner space of the battery module 100, the venting gas may be discharged to the outside of the battery module 100 through the opening O1.
- the opening O1 may function as a venting gas outlet in the battery module 100 .
- a large amount of venting gas may be discharged toward the opening O1 located on the upper side.
- the glass bulb may be quickly ruptured when the venting gas is generated. Therefore, when a thermal event occurs, a more rapid input of the digestive fluid may be possible. Moreover, a separate operating power source or control configuration may not be required for the injection of the digestive fluid. In addition, in this case, since the extinguishing liquid may be directly injected into the venting gas, the temperature of the venting gas may be lowered and discharge of an external ignition source such as a flame or spark included in the venting gas may be suppressed.
- an external ignition source such as a flame or spark included in the venting gas may be suppressed.
- the opening O1 formed in the battery module 100 may not necessarily be provided for discharging a venting gas or the like.
- the opening O1 provided at the top of the battery module 100 shown in FIG. 2 may be provided for carrying the battery module 100 . That is, the opening O1 may be configured to provide a space in which a worker or a carrying device can insert and grip a finger or a gripping tool when the battery module 100 is transported.
- the opening O1 may be provided with a configuration for inserting a control module 400 or a fire extinguishing tank 200 described later.
- the battery pack according to the present invention may further include a control module 400 .
- the control module 400 may be electrically connected to the battery module 100 . Also, the control module 400 may be configured to manage the battery module 100 . In particular, the control module 400 may be configured to control a charging operation or a discharging operation of the battery module 100 . In addition, the control module 400 may be configured to measure, calculate, receive, or control various electrical, physical, and chemical characteristics of the battery module 100, a battery cell included therein, or its surrounding environment. For example, the control module 400 may measure, calculate, or control voltage, current, temperature, state of charge (SOC), state of health (SOH), internal resistance, etc. of the battery cell or battery module 100. can
- the control module 400 may receive operating power from the battery module 100 to manage the battery module 100 .
- the control module 400 may exchange various data with the battery module 100 or other external devices through a wired or wireless communication network.
- the control module 400 may include various electric components such as a battery management system (BMS), a relay, and a current sensor.
- BMS battery management system
- the control module 400 may include a control housing for accommodating such electrical components.
- control module 400 may include a pack terminal. These pack terminals may be configured to be connected to a battery pack and an external charging or discharging device.
- the pack terminal may include an outlet, a plug, or a connector to be connected to commercial power or a load.
- the control module 400 may have a power path for exchanging charging power and discharging power with the battery module 100 . This power path may function as a path for exchanging charging and discharging power between the pack terminal and the battery module 100 .
- the fire extinguishing tank 200 may be mounted between the battery module 100 and the control module 400.
- the battery module 100 may be located under the control module 400 .
- the fire extinguishing tank 200 may be located above the battery module 100 and below the control module 400 .
- the fire extinguishing tank 200 may be configured to be coupled to the battery module 100 and the control module 400.
- the lower end of the fire extinguishing tank 200 may be fastened and fixed to the upper end of the battery module 100 by bolting or hooking.
- the upper end of the fire extinguishing tank 200 may be fastened and fixed to the lower end of the control module 400 by bolting or hooking.
- the fire extinguishing tank 200 may include a connection member for connecting the battery module 100 and the control module 400.
- the fire extinguishing tank 200 may include a cable extending in a vertical direction, and connection connectors may be provided at both ends of the cable.
- the connection connector provided at the upper end of the cable may be connected to the connector of the control module 400, and the connection connector provided at the lower end of the cable may be connected to the connector of the battery module 100.
- the cable may allow electrical connection to be made between the battery module 100 and the control module 400 through this connection.
- the fire extinguishing tank 200 is interposed between the battery module 100 and the control module 400, so that the battery Thermal event response for both module 100 and control module 400 may be possible.
- the cover member 300 may be configured to open and close in a direction compensating for a pressure change inside the fire extinguishing tank 200. That is, when a change occurs in the internal pressure of the fire extinguishing tank 200, the cover member 300 may be opened and closed in a direction to reduce the pressure change.
- the cover member 300 may be opened and closed so that the internal pressure of the fire extinguishing tank 200 decreases again when a pressure change occurs in a direction in which the internal pressure of the fire extinguishing tank 200 increases.
- the cover member 300 may be opened and closed so that the internal pressure of the fire extinguishing tank 200 increases again when a pressure change occurs in a direction in which the internal pressure of the fire extinguishing tank 200 decreases.
- the pressure change inside the fire extinguishing tank 200 may not exceed a certain level. Therefore, it is possible to prevent breakage or damage of the fire extinguishing tank 200 due to a change in pressure inside the fire extinguishing tank 200, and to enable smooth discharge of the fire extinguishing fluid.
- the cover member 300 may include one or multiple unit covers. Moreover, when the cover member 300 includes a plurality of unit covers, through holes H corresponding to each unit cover may be formed in the fire extinguishing tank 200 .
- the cover member 300 may include a first cover 310 as a unit cover.
- the first cover 310 may be configured to be opened when the pressure inside the fire extinguishing tank 200 increases.
- a first hole H1 may be formed as a through hole H at one side of the fire extinguishing tank 200 .
- the first cover 310 may be configured to open or close the first hole H1.
- the first cover 310 may remain closed to the first hole H1.
- the first cover 310 may rotate in the direction of arrow B1 in FIG. 3 . At this time, the first hole H1 may be opened.
- the gas inside the fire extinguishing tank 200 may be discharged to the outside through the first hole H1.
- a situation in which the digestive fluid is frozen may occur due to a decrease in external temperature, and in this freezing situation, the volume of the digestive fluid such as water may increase.
- the internal pressure of the fire extinguishing tank 200 may increase, and the gas inside the fire extinguishing tank 200 may be discharged to the outside by the first cover 310 opening the first hole H1. Therefore, by preventing the internal pressure of the fire extinguishing tank 200 from continuously increasing, problems in which the fire extinguishing tank 200 is damaged, broken, or exploded can be prevented.
- battery packs used in residential energy storage systems and the like are generally used outdoors. Therefore, a freezing situation of fire extinguishing fluid may occur depending on the usage environment such as winter season or polar region. can be prevented
- the first cover 310 may be configured to be openable in an outward direction.
- the first cover 310 may be configured to open outward, as indicated by arrow B1 in FIG. 3 . And, through this opening operation, gas inside the fire extinguishing tank 200 may be discharged to the outside.
- the opening operation of the first cover 310 can be made more smoothly. That is, the first cover 310 may be opened to allow gas inside the fire extinguishing tank 200 to be discharged to the outside due to an increase in the internal pressure of the fire extinguishing tank 200. The operation can be performed more easily. In addition, in this case, gas inside the fire extinguishing tank 200 may not be hindered by the first cover 310 while entering the first hole H1. Therefore, the internal gas can be more smoothly discharged to the outside.
- the fire extinguishing tank 200 may include a plurality of unit tanks. This will be described in more detail with further reference to FIGS. 5 and 6 .
- FIG. 5 is a perspective view showing the fire extinguishing tank 200 according to an embodiment of the present invention in isolation.
- 6 is an enlarged cross-sectional view of a portion of the fire extinguishing tank 200 according to an embodiment of the present invention. For example, it can be said that FIG. 6 shows the right side of the cross-sectional configuration along line A2-A2' in FIG. 1 .
- the fire extinguishing tank 200 may include an inner tank 201 and an outer tank 202.
- the inner tank 201 has an empty space therein, and can directly hold the digestive fluid as indicated by L in this inner space.
- the inner tank 201 may be configured in a sealed form to accommodate the digestive fluid (L).
- the inner tank 201 may be configured to have an airtight performance of IP grade 55 or higher so that the fire extinguishing liquid L or the like does not leak under normal conditions.
- the outer tank 202 may be larger than the inner tank 201 and configured to accommodate the inner tank 201 in the inner space. Therefore, it can be said that the fire extinguishing tank 200 is, at least partially, composed of a double structure.
- the outer tank 202 may be configured to at least partially enclose the outside of the inner tank 201 .
- the outer tank 202 may cover all or part of the inner tank 201 from the outside.
- the first cover 310 may be mounted on the external tank 202 .
- the first cover 310 may be mounted on the right side of the external tank 202 .
- the first cover 310 is mounted on the outer surface of the outer tank 202 and can be opened by pivoting the hinge outward as indicated by arrow B1'.
- the volume of the digestive fluid may expand as indicated by arrow B3 in FIG. 6 .
- the first cover 310 may be opened while the pressure of the upper portion of the digestive fluid in the inner tank 201 increases.
- gas inside the fire extinguishing tank 200 may be discharged to the outside. That is, in the direction indicated by arrow B3' in FIG. 6, the gas inside the fire extinguishing tank 200 may be discharged to the external space.
- opening of the first cover 310 can be made easily. Therefore, when the internal pressure of the fire extinguishing tank 200 is increased, gas can be discharged quickly and smoothly.
- the first hole H1 which is the through hole H to which the first cover 310 is mounted, may be configured to communicate with each other in the inner tank 201 and the outer tank 202.
- the first hole H1 may include a first inner hole formed in the inner tank 201 and a first outer hole formed in the outer tank 202 .
- the first inner hole and the first outer hole may be connected to each other as one hole.
- a connection portion between the first inner hole and the first outer hole may be sealed with an O-ring made of a material such as rubber or silicon.
- one pipe may pass through the first inner hole and the first outer hole, and the inner space of the pipe may function as the first hole H1.
- the pipe may be made of various materials such as polymer or rubber.
- the gas inside the fire extinguishing tank 200 passes through the first hole H1 formed by connecting the first inner hole and the first outer hole, as indicated by arrow B3' in FIG. 6, It may be discharged to the outside of the fire extinguishing tank 200.
- the first cover 310 may be configured such that the digestive fluid is injected into the internal space of the digestive tank 200 from the outside. This will be described in more detail with further reference to FIG. 7 .
- FIG. 7 is a schematic diagram showing an example of a configuration for injecting a digestive fluid into a battery pack according to an embodiment of the present invention.
- the digestive juice may be injected into the first hole H1.
- the first cover 310 can be manually opened regardless of the change in the internal pressure of the fire extinguishing tank 200, particularly the internal pressure of the internal tank 201.
- one end of the hose C is connected to the first hole H1 so that the fire extinguishing liquid can be injected into the fire extinguishing tank 200.
- the replenishment of the digestive fluid may be performed in the form of injecting the digestive fluid in the opposite direction of the arrow B3' in the exemplary embodiment of FIG. 6 .
- replenishment of the digestive fluid may be performed outside the external tank 202, and the first external hole and the first internal hole may be connected to each other in a sealed state. Therefore, the digestive fluid injected through the first outer hole may flow into the inner space of the inner tank 201 through the first inner hole.
- the extinguishing fluid when the extinguishing fluid is used or becomes insufficient in the internal space of the fire extinguishing tank 200 due to evaporation or leakage, the extinguishing fluid may be replenished through the first cover 310 . Accordingly, maintenance of the battery pack may be more easily performed. In addition, by ensuring that the fire extinguishing fluid is always held at a certain level or higher, the state of ensuring safety by the fire extinguishing tank 200 can be continuously maintained.
- first cover 310 may be located on the side of the fire extinguishing tank 200.
- first cover 310 may be located on the right side of the external tank 202 as shown in various drawings.
- first cover 310 may be located in a portion exposed to the outside in the fire extinguishing tank 200.
- the internal gas discharge process as shown in FIG. 6 can be made more smoothly.
- the process of injecting the digestive fluid as shown in FIG. 7 can be made more conveniently.
- the fire extinguishing tank 200 may have other components, such as the battery module 100 or the control module 400, at the top and/or bottom. Therefore, when the first cover 310 is located on the side of the fire extinguishing tank 200, the process of discharging the internal gas to the outside or pouring the fire extinguishing liquid can be easily performed without being hindered by these other components.
- first hole H1 opened and closed by the first cover 310 in FIG. 6, it may have a form extending in the horizontal direction (X-axis direction), but the present invention is necessarily such a first hole ( It is not limited to the form of H1).
- the first hole H1 may be inclined at a predetermined angle with respect to the horizontal direction.
- the first hole H1 may include an inclined portion configured to decrease in position from the outside to the inside.
- the outer inlet of the first hole H1 may be positioned higher than the inner inlet.
- the battery pack according to the present invention may further include an observation window.
- an observation window W may be provided on one side of the fire extinguishing tank 200, for example, on the side.
- the observation window W may be made of a transparent or translucent material, and may be provided to observe the digestive fluid held in the internal space of the digestive tank 200.
- the observation window W is provided in both the inner tank 201 and the outer tank 202, corresponding to each other. position can exist.
- the present invention by directly checking the level or state of the digestive fluid, it is possible to grasp or predict in advance the point in time when replenishment of the digestive fluid is required.
- the cover member 300 may include a second cover 320 as a unit cover.
- the second cover 320 may be configured to open when the pressure inside the fire extinguishing tank 200 decreases. This will be described in more detail with reference to FIG. 8 .
- FIG. 8 is an enlarged cross-sectional view of another portion of the fire extinguishing tank 200 according to an embodiment of the present invention.
- FIG. 8 shows the right side of the cross-sectional configuration along the line A3'-A3' in FIG.
- a second hole H2 may be formed as a through hole H at one side of the fire extinguishing tank 200 .
- the second hole H2 may be formed at a location different from that of the first hole H1.
- the second cover 320 may be configured to open or close the second hole H2.
- the second cover 320 may maintain the second hole H2 closed. However, when the internal pressure of the fire extinguishing tank 200 decreases below a certain level, the second cover 320 may pivot as shown by arrow B4 in FIG. 8 . At this time, the second hole H2 may be opened.
- gas outside the fire extinguishing tank 200 may be introduced into the inside through the second hole H2. That is, as indicated by arrow B5 in FIG. 8 , gas outside the fire extinguishing tank 200 may flow into the fire extinguishing tank 200 through the second hole H2.
- the fire extinguishing liquid L is injected into the battery module 100 as indicated by arrow B2 in FIG. 2,
- the water level inside the fire extinguishing tank 200 may be lowered as indicated by B6 in FIG. 8 .
- the pressure inside the fire extinguishing tank 200 may decrease, and this pressure decrease may reduce the rate at which the fire extinguishing liquid L is injected into the battery module 100 or may interfere with the injection itself.
- the second cover 320 may be configured to be openable in an inward direction.
- the second cover 320 may be mounted on the inner surface of the fire extinguishing tank 200. And, when the internal pressure of the fire extinguishing tank 200 decreases, the second cover 320 may be configured to open toward the inner space of the fire extinguishing tank 200, as indicated by arrow B4 in FIG. 8 . And, through this opening operation, gas outside the fire extinguishing tank 200 may flow into the inner space.
- the opening operation of the second cover 320 can be made more smoothly. That is, the second cover 320 may be opened to allow gas outside the fire extinguishing tank 200 to flow into the inside due to the decrease in internal pressure of the fire extinguishing tank 200. When opened in the inward direction, the opening operation can be done more easily. In addition, in this case, when external gas flows into the second hole H2, it is not hindered by the second cover 320, so that the external gas can flow more smoothly.
- fire extinguishing tank 200 may have an inner tank 201 and an outer tank 202, as described above.
- the second cover 320 may be mounted on the inner tank 201 .
- the second cover 320 may be configured to be mounted on an inner surface of the inner tank 201 and open in an inward direction.
- a portion of the inner tank 201 where the second cover 320 is located that is, a portion where the second hole H2 is formed may not be covered by the outer tank 202 .
- the outer tank 202 may be formed with an open inner space, as indicated by E in FIG. 5 .
- a portion of the inner tank 201 where the second cover 320 is provided may be located at a portion of the outer tank 202 where the open space E is formed.
- the opening operation of the second cover 320 and the inflow of external gas can be made more easily.
- the second cover 320 can open well in the inward direction.
- the structure of the fire extinguishing tank 200 becomes simpler, and it can contribute to weight reduction of the battery pack.
- the second hole H2 only needs to be formed in the inner tank 201 and may not be separately formed in the outer tank 202 . In this configuration, when the second cover 320 mounted inside the inner tank 201 is opened, outside air may flow into the inner tank 201 immediately.
- the second cover 320 may be located on the upper side of the fire extinguishing tank 200.
- the second hole H2 and the second cover 320 attached thereto may be located on the upper surface side of the fire extinguishing tank 200.
- the first cover 310 and the second cover 320 are provided as the cover member 300, the first cover 310 is provided on the side of the fire extinguishing tank 200, and the second cover 320 ) may be provided on the upper surface of the fire extinguishing tank 200.
- the positions of the first cover 310 and the second cover 320 are formed differently, so that the opening and closing operations of the first cover 310 and the second cover 320 do not interfere with each other.
- the external air is supplied from the upper side to the inside of the fire extinguishing tank 200, so that the pressure of the gas can be evenly distributed in the direction of the fire extinguishing fluid from the upper part of the fire extinguishing fluid. Therefore, even if the digestive fluid is discharged through the glass bulb provided at any location, the digestive fluid can be smoothly discharged.
- the venting gas flows from the lower side of the fire extinguishing tank 200, it is possible to prevent the venting gas from flowing into the fire extinguishing tank 200 through the side of the second cover 320.
- the second It may not be obstructed by the cover 320 .
- the battery pack is installed on an inclined surface, so that even if the water level is inclined in the internal space of the inner tank 201, the leakage of the fire extinguishing fluid to the outside through the second hole H2 is prevented. It can be.
- the inner tank 201 and the outer tank 202 may be configured to be at least partially spaced apart.
- the outer tank 202 surrounds the four side surfaces (left side, right side, front side, and rear side) of the inner tank 201, except for the upper and lower surfaces. may consist of
- a portion where the inner tank 201 is covered by the outer tank 202 may be configured such that the inner tank 201 and the outer tank 202 are spaced apart from each other.
- side surfaces of the inner tank 201 and the outer tank 202 may be spaced apart from each other, at least partially, in the left and right directions.
- an empty space may be formed between the right wall of the inner tank 201 and the right wall of the outer tank 202 .
- the fire extinguishing fluid inside the fire extinguishing tank 200 can be held more safely.
- the transmission of the shock can be alleviated by the double structure of the outer tank 202 and the inner tank 201 and the empty space formed therebetween. Therefore, by preventing the fire extinguishing tank 200, particularly the inner tank 201, from being damaged by shock or vibration, it is possible to prevent the fire extinguishing liquid from leaking abnormally.
- the space between the inner tank 201 and the outer tank 202 may function as a venting path.
- the venting gas discharged from the battery module 100 to the lower portion of the fire extinguishing tank 200 flows along the lower surface of the fire extinguishing tank 200 and then flows between the side of the inner tank 201 and the outer tank 202. It can be discharged to the outside while flowing through the spaced space of the In this case, a venting path is formed inside the fire extinguishing tank 200, so that the venting direction can be controlled.
- the cover member 300 may be configured to switch from an open state to a closed state when the pressure difference between the internal pressure of the fire extinguishing tank 200 and the external air pressure falls within a certain level.
- the first cover 310 when the water level of the digestive fluid rises as indicated by the arrow B3 due to the freezing of the digestive fluid stored in the inner tank 201, the first cover 310 is moved in the direction indicated by the arrow B1 ', That is, it may rotate counterclockwise to be in an open state. And, when the air in the inner tank 201 escapes as shown by arrow B3', and the air pressure difference between the inside and outside of the inner tank 201 becomes the same or comes within a certain level, the first cover 310 is opened again as indicated by arrow B1'. It can be rotated in the opposite direction, i.e. clockwise, to a closed state.
- the cover member 300 may include an elastic body.
- a spring particularly a torsion spring, may be mounted on a hinge portion indicated by I1 in FIG. 6 .
- the first cover 310 may be opened.
- the first cover 310 may be closed.
- the second cover 320 when the extinguishing fluid stored in the internal tank 201 is injected into the battery module 100 and the water level of the extinguishing fluid decreases as shown by arrow B6, the second cover 320 is moved to the arrow B4 It can be opened by rotating in the direction indicated by , that is, clockwise. And, after external air enters the inner tank 201 to a certain extent, the second cover 320 rotates in the opposite direction of the arrow B4, that is, counterclockwise, to be in a closed state.
- an elastic body such as a spring may be mounted on the second cover 320 as well.
- a torsion spring may be mounted on a hinge portion indicated by I2 in FIG. 8 .
- the second cover 320 may be opened.
- the second cover 320 may be closed.
- a configuration in which the cover member 300 is automatically opened and closed according to the pressure change inside the fire extinguishing tank 200 can be easily achieved.
- a separate power source or control is not required in the closing operation as well as in the opening operation of the cover member 300 .
- the cover member 300 is automatically and quickly closed, so that the outflow of fire extinguishing liquid through the through hole H It is possible to more reliably prevent the inflow of external foreign substances.
- An energy storage system includes one or more battery packs according to the present invention described above.
- the energy storage system according to the present invention may further include general components included in the energy storage system in addition to the battery pack.
- the energy storage system according to the present invention may be a housing (building) energy storage system used to store energy in houses or buildings.
- H1 first hole
- H2 second hole
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- General Chemical & Material Sciences (AREA)
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- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Engineering & Computer Science (AREA)
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- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Health & Medical Sciences (AREA)
- Battery Mounting, Suspending (AREA)
- Filling, Topping-Up Batteries (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
Description
Claims (14)
- 하나 이상의 배터리 셀을 구비하는 배터리 모듈;소화액을 보유하며 상기 배터리 모듈의 상부에 배치되고 관통홀이 형성된 소화 탱크; 및상기 소화 탱크의 상기 관통홀에 설치되어 상기 소화 탱크의 내부 압력 변화에 따라 상기 관통홀을 개방 또는 폐쇄시키도록 구성된 커버 부재를 포함하는 것을 특징으로 하는 배터리 팩.
- 제1항에 있어서,상기 소화 탱크는, 소정 조건에서 파열 가능하도록 구성되어, 파열 시 상기 소화액의 유출이 가능하도록 구성된 파열 부재를 구비하는 것을 특징으로 하는 배터리 팩.
- 제1항에 있어서,상기 배터리 모듈과 연결되어 상기 배터리 모듈을 관리하도록 구성된 제어 모듈을 더 포함하며,상기 소화 탱크는, 상기 배터리 모듈과 상기 제어 모듈 사이에 장착된 것을 특징으로 하는 배터리 팩.
- 제1항에 있어서,상기 커버 부재는, 상기 소화 탱크 내부의 압력 변화를 보상하는 방향으로 개폐 동작이 이루어지록 구성된 것을 특징으로 하는 배터리 팩.
- 제1항에 있어서,상기 커버 부재는, 상기 소화 탱크 내부의 압력이 증가할 때 개방되도록 구성된 제1 커버를 구비하는 것을 특징으로 하는 배터리 팩.
- 제5항에 있어서,상기 제1 커버는, 외측 방향으로 개방 가능하도록 구성된 것을 특징으로 하는 배터리 팩.
- 제6항에 있어서,상기 소화 탱크는, 내부 공간에 상기 소화액을 보유하는 내부 탱크, 및 상기 내부 탱크의 외측을 적어도 부분적으로 감싸는 외부 탱크를 구비하며,상기 제1 커버는, 상기 외부 탱크에 장착된 것을 특징으로 하는 배터리 팩.
- 제5항에 있어서,상기 제1 커버는, 상기 소화 탱크의 측부에 위치하는 것을 특징으로 하는 배터리 팩.
- 제1항에 있어서,상기 커버 부재는, 상기 소화 탱크 내부의 압력이 감소할 때 개방되도록 구성된 제2 커버를 구비하는 것을 특징으로 하는 배터리 팩.
- 제9항에 있어서,상기 제2 커버는, 내측 방향으로 개방 가능하도록 구성된 것을 특징으로 하는 배터리 팩.
- 제10항에 있어서,상기 소화 탱크는, 내부 공간에 상기 소화액을 보유하는 내부 탱크, 및 상기 내부 탱크의 외측을 적어도 부분적으로 감싸는 외부 탱크를 구비하며,상기 제2 커버는, 상기 내부 탱크에 장착된 것을 특징으로 하는 배터리 팩.
- 제9항에 있어서,상기 제2 커버는, 상기 소화 탱크의 상부 측에 위치하는 것을 특징으로 하는 배터리 팩.
- 제1항에 있어서,상기 커버 부재는, 상기 소화 탱크 내부의 압력과 외부 기압의 압력 차가 일정 수준 이내로 들어오는 경우, 개방 상태에서 폐쇄 상태로 전환되도록 구성된 것을 특징으로 하는 배터리 팩.
- 제1항 내지 제13항 중 어느 한 항에 따른 배터리 팩을 포함하는 것을 특징으로 하는 에너지 저장 시스템.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP22911893.0A EP4290679A1 (en) | 2021-12-22 | 2022-12-20 | Battery pack with improved safety |
JP2023556842A JP2024511347A (ja) | 2021-12-22 | 2022-12-20 | 安全性が向上したバッテリーパック |
US18/276,144 US20240097238A1 (en) | 2021-12-22 | 2022-12-20 | Battery pack having improved safety |
AU2022421902A AU2022421902A1 (en) | 2021-12-22 | 2022-12-20 | Battery pack having improved safety |
CN202280017697.6A CN116918169A (zh) | 2021-12-22 | 2022-12-20 | 具有改进安全性的电池组 |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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KR20210185390 | 2021-12-22 | ||
KR10-2021-0185390 | 2021-12-22 | ||
KR1020220146362A KR20230095799A (ko) | 2021-12-22 | 2022-11-04 | 안전성이 향상된 배터리 팩 |
KR10-2022-0146362 | 2022-11-04 |
Publications (1)
Publication Number | Publication Date |
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WO2023121260A1 true WO2023121260A1 (ko) | 2023-06-29 |
Family
ID=86903426
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/KR2022/020891 WO2023121260A1 (ko) | 2021-12-22 | 2022-12-20 | 안전성이 향상된 배터리 팩 |
Country Status (5)
Country | Link |
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US (1) | US20240097238A1 (ko) |
EP (1) | EP4290679A1 (ko) |
JP (1) | JP2024511347A (ko) |
AU (1) | AU2022421902A1 (ko) |
WO (1) | WO2023121260A1 (ko) |
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EP2159894A1 (en) * | 2008-03-11 | 2010-03-03 | Panasonic Corporation | Power apparatus and electronic apparatus using the same |
KR20100072176A (ko) * | 2008-03-04 | 2010-06-30 | 파나소닉 주식회사 | 전력 기기와 그것을 이용한 전자 기기와 전력 공급 소자 검사 설비 |
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JP5618641B2 (ja) * | 2010-06-07 | 2014-11-05 | 能美防災株式会社 | 消火装置 |
KR101616506B1 (ko) * | 2015-11-13 | 2016-04-28 | 이경로 | 미분무 소화가 가능한 원유 저장탱크용 브리더밸브 |
KR20220146362A (ko) | 2021-04-23 | 2022-11-01 | 주식회사 엘지에너지솔루션 | 이차 전지의 제조 방법 |
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- 2022-12-20 AU AU2022421902A patent/AU2022421902A1/en active Pending
- 2022-12-20 JP JP2023556842A patent/JP2024511347A/ja active Pending
- 2022-12-20 WO PCT/KR2022/020891 patent/WO2023121260A1/ko active Application Filing
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KR20100072176A (ko) * | 2008-03-04 | 2010-06-30 | 파나소닉 주식회사 | 전력 기기와 그것을 이용한 전자 기기와 전력 공급 소자 검사 설비 |
EP2159894A1 (en) * | 2008-03-11 | 2010-03-03 | Panasonic Corporation | Power apparatus and electronic apparatus using the same |
JP5618641B2 (ja) * | 2010-06-07 | 2014-11-05 | 能美防災株式会社 | 消火装置 |
KR20130028023A (ko) * | 2011-09-08 | 2013-03-18 | 주식회사 엘지화학 | 배터리 팩 화재진압 장치 |
KR101616506B1 (ko) * | 2015-11-13 | 2016-04-28 | 이경로 | 미분무 소화가 가능한 원유 저장탱크용 브리더밸브 |
KR20220146362A (ko) | 2021-04-23 | 2022-11-01 | 주식회사 엘지에너지솔루션 | 이차 전지의 제조 방법 |
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EP4290679A1 (en) | 2023-12-13 |
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